Inlet air valve for sewage systems

 

The invention relates to installed in the sewer system inlet air valve, which protects your system water separator (s) and prevents messages sewage system with the surrounding atmosphere, and in the fall it pressure automatically opens and through it into the sewage system enters the ambient air. The technical result is the creation of simple to manufacture while providing an enclosed valve element of the seal of the valve, the maximum resolves the onset of turbulence in flowing through the air flow so as to maximize the effort of lifting the valve element to prevent the accumulation of water inside the valve condensate. The intake air valve has a housing, comprising a pipe through which the valve is connected with the pipe of the Sewerage system and in which the upper part is made in the form of a gradually tapering to the apex of the cone, at least one window through which the internal cavity of the tube is connected with the functional elements of the valve, valve seat and valve element, the cover that is over the top tube and the top wall to the it part of the pipe and the top wall of the cover, when this valve element rests on a valve seat, which has a sealing surface located in a horizontal plane H passing through the vertex of the conical part of the tube, and is free to move upward relative to the seat, and at least one inlet window through which the inside of the valve enters the surrounding air and which is communicated with the lower surface of the valve element, the upper surface of which communicates with the sewer system, at least through one window, resulting in a pressure sewer system, equal to or greater atmospheric, the valve element closes the valve, and when the pressure in the sewer system, less atmospheric, the valve element opens the valve, and when the pressure in the sewer system becomes less than atmospheric, ambient air passes into a connected sewer system pipe. The body is made at least two inlet box and located between at least two Windows, through which air passes into the sewage system, while these Windows are evenly distributed inside the valve in cross section the horizontal plane, prohodjashei the class="ptx">

The technical field,

The present invention relates to installed in the sewer system inlet air valve, which protects your system water separator (s) and prevents messages sewage system with the surrounding atmosphere, and in the fall it pressure automatically opens and through it into the sewage system enters the ambient air.

During normal operation of sewer systems draining and venting the discharge of water into the sewage system of the connected sanitary devices in the Sewerage system there is a sharp drop in water pressure, accompanied by the movement of air in the vertical risers of the system. To protect residential areas from the ingress of sewer systems odorous air each of these sanitary devices are usually equipped with water bolt. Changes in water pressure in the sewer system cause changes in air pressure, which can lead to failure of the water separator (paddles) or by siphonaria arising from unexpected pressure drop in the system or due to air mA the special air intake valves, which open only when the pressure in the sewer system below atmospheric and allow one way or another to solve the aforementioned problems and to waive the need to use vent risers, facing the roof of the building.

Typically, these valves are designed in such a way that the amount of air passing through the open diaphragm valve and entering through the inlet valve into the sewage system, it was possible maximum.

The closest analogue to the claimed invention is an air intake valve, which is connected with the pipe of the Sewerage system and through functional elements which when the pressure in a pipe connected to the sewage system, enters the surrounding air, which protects the existing Sewerage system / water separators - shutters - and prevents the ingress of the surrounding atmosphere of the sewer system which has an unpleasant odor air, with such a valve has a housing (10) comprising a tube (12) through which the valve is connected with the pipe of the Sewerage system and which in the upper part (13) made in the form of gradually tapering to the apex of the cone, at least one window (14), through to the valve element, the cover (40, 50), which is located above the upper part (13) of the pipe (12) and the upper wall of which is at a distance from the upper part (13) of the pipe (12), the valve element (34, 64) located between the upper part (13) of the pipe (12) and the upper wall of the lid (40, 50), while the valve element (34, 64) rests on the seat (24) of the valve, which has a sealing surface located in a horizontal plane H, passing near the top of the conical part of the tube (12), and is free to move upward relative to the seat, and at least one inlet window (30), through which the inside of the valve enters the surrounding air and which is communicated with the lower surface of the valve element (34, 64), the upper surface of which communicates with the sewer system, at least one window (14), resulting in a pressure sewer system, equal to or greater atmospheric, the valve element (34, 64) closes the valve, and when the pressure in the sewer system, less atmospheric, the valve element (34, 64) opens the valve, and when the pressure in the sewer system becomes less than atmospheric, ambient air passes into a connected sewer system pipe - pathetically pipe, has the form of Venturi tubes, which together with the cover forms located at the outer edge of the device inlet for air from the annular valve element when there is vacuum in the pipe bends and vertical riser sewer system arrives fresh air, and when aligning pressure or at a pressure in the sewer system is returned to the closed position, thereby eliminating the possibility of leakage out of the system of sewage contaminated with the unpleasant smell of the air.

This valve device is located at the edge of a circular hole, which when lifting the annular valve element distributes through a device the air and directs it to a vertical pipe connected to the pipe of the Sewerage system. The advantage of this device due to the presence of the vertical pipe, made in the form of Venturi tubes is sufficiently large amount of air entering at the opening of the valve in the sewer system, however, in some cases, in the area between the annular inlet valve and connected to the sewer system pipe turbulence occurs. This turbulently annular valve element, collected in the Central part of the drain pipe, which is due to the smaller compared to the valve diameter and a smaller flow area reduces the throughput of the valve and limits the number of entrants into the sewage system of air.

In the valve device of this type is round, or circular, the valve element is usually overlaps with two concentric valve seat, each of which has a circular sealing surface. When deformation of the valve element or damages arise a number of problems associated with having a sealed overlap at least one of the sealing surfaces of the seat.

In the patent CH 201265 proposed intake air valve of another type. This valve has two diametrically opposite to the inlet, between which the edge of the valve there are two diametrically opposite Windows, connecting the upper surface is made in the form of a circular disk valve element from reaching the sewer system pipe. The amount of air passed through this valve, in particular through two narrow Windows, is extremely limited, and so it can be used when draining water only from a single sanitary communicates with the lower side is made in the form of a disk valve element through a single radial channel. When opening the valve element passing through this channel the air flows into the sewage system. Obviously, the passage of air through such radial channel is accompanied by the appearance in the valve of significant turbulence, which significantly reduces the bandwidth.

Summary of the invention

The present invention was used to develop the automatic air intake valve, which would allow minimizing the occurrence of turbulence in flowing through the air flow by choosing the optimal balance between size located near the functional elements of the valve inlet Windows and the Windows through which the incoming valve air enters connected with the sewer system pipe.

Another object of the invention is to develop a valve with a well balanced due to its shape and form holes in the saddle valve element for ensuring an optimal distribution flow passing through the air valve and allowing you to get the maximum effort of lifting the valve element in one sealing surface of the valve seat and more prolana.

A third object of the invention is to develop a valve on the inner surface of the housing of which there are several devices that prevent the accumulation of water inside the valve condensate and promote his force drain into a connected with the sewer system pipe.

The fourth objective of the invention to provide an air inlet valve, during casting of the housing which are located in the housing inlet open to the air and open for passage of air connected with the sewer system pipe simultaneously fill and grille, while some of the elements of the lattice are protruding inside of the valve sections, which rests on the valve element when the excessive pressure of air or fire in the sewer system pipes.

The fifth objective of the present invention to provide an inlet air valve for sewage systems, which would be simple to manufacture and consisted of only three elements, each of which can be manufactured by casting.

The above problems are solved using the proposed in the invention of the valve, the hallmarks of which are discussed in detail in the claims.

Other otline perform its proposed valve with reference to the accompanying drawings.

Air intake valve, which is connected with the pipe of the Sewerage system and through functional elements which when the pressure in a pipe connected to the sewage system, enters the surrounding air, which protects the existing Sewerage system / water separators - shutters - and prevents the ingress of the surrounding atmosphere of the sewer system which has an unpleasant odor air, with such a valve has a housing (10) comprising a tube (12) through which the valve is connected with the pipe of the Sewerage system and which in the upper part (13) is made in the form of a gradually tapering to the apex of the cone, at least one window (14), through which the internal cavity of the tube is connected with the functional elements (24, 34, 64) of the valve, valve seat and valve element, the cover (40, 50), which is located above the upper part (13) of the pipe (12) and the upper wall of which is at a distance from the upper part (13) of the pipe (12), the valve element (34, 64) located between the upper part (13) of the pipe (12) and the upper wall of the lid (40, 50)when this valve element (34, 64) rests on the seat (24) of the valve, which has a sealing surface located in a horizontal plane H passing the fight, and at least one inlet window (30), through which the inside of the valve enters the surrounding air and which is communicated with the lower surface of the valve element (34, 64), the upper surface of which communicates with the sewer system, at least one window (14), resulting in a pressure sewer system, equal to or greater atmospheric, the valve element (34, 64) closes the valve and when the pressure in the sewer system, less atmospheric, the valve element (34, 64) opens the valve, and when the pressure in the sewer system becomes less than atmospheric, ambient air passes into a connected sewer system pipe, characterized by the presence in the body (10) at least two inlet window (30) and located between at least two Windows (14), through which air passes into the sewage system, while these specified window (30) and (14) are uniformly distributed inside the valve in cross section the horizontal plane passing near plane N, which is the valve seat.

The total area of the channel for the passage of air formed open functional elements (24, 34, 64) of the valve, valve seat and valve element, Ionally elements of the valve in the sewer system.

The total area of the channel for the passage of air formed open functional elements (24, 34, 64) of the valve, valve seat and valve element is essentially equal to the area of the inner bore of the pipe (12).

In the housing (10) of the valve there is a shell (20) and the partition (26), which divides the inner space of the shell into separate cavity with a uniform distribution of the air stream flowing through the valve with exposed functional elements (34, 64) of the valve, valve seat and valve element over the entire inner space of the valve body from the inlet window (30), through which the inside of the valve enters the surrounding air, and to check boxes (14), through which the air passes into a connected sewer system pipe.

In the housing (10) of the valve there is an elongated Cup-shaped shell (20) and the partition (26), which divides the internal volume of the Cup-shaped shell (20) arranged perpendicularly to each other of the pair of the first (18) and second (19) of the camera, with the camera (18) of the first pair are communicated with the surrounding atmosphere through the window (30) in the shell (20) and the chamber (19) of the second pair are connected with the lower tube (12) of the valve body and the sewage system through the Windows (14) in the upper conic the Rog from each other in the cross section of the valve horizontal plane H and provide uniform distribution of air flow, passing through the body (10) of the valve.

The upper conical part (13) of the pipe (12) is made from top closed and has at least two located on each side of the window (14), separated from each other closed areas (28).

Two inlet window (30), through which the inside of the valve hits the air, are located diametrically opposite each other on a line perpendicular to the line connecting the two diametrically opposite the window (14) through which air enters the sewage system.

The inlet window (30), through which the inside of the valve hits the air, made in the cupped shell (20), inside of which is tapered portion (13) of the pipe (12) with an upper edge (22) of the shell (20) is located near the plane H of the valve seat.

Saddle (24) of the valve has a continuous impervious to air, the surface coming down along with the partition (26), which divides into separate chambers of the internal space of the shell (20), respectively, between the Windows (14) and closed areas (28) tapered part (13) of the pipe (12).

Sealing the surface of the functional elements of the valve, i.e. its seat (24) and the corresponding valve element (34, 64), has essentially the form of a "butterfly", located along prodasineura "butterflies" seat (24) of the valve to the total area of the openings between the seat (24) of the valve and the inner surface of the cupped shell (20), forming a zone of possible pressure drop, preferably less than 1, which allows to get the maximum effort of lifting the valve element (34, 64) on the seat (24) of the valve.

Window (30) and (14) are respectively the lattice (36, 16).

On the valve element (34) is there covered by the guide rod (35), which interacts with covering the guide hole (32) made in the housing (10) of the valve.

On the valve element (64) is there covering the routing hole (62), which interacts with a fixed covered in the guide rod (52) located on the cover (50) of the housing (10) of the valve.

On the inner surface of the housing (10) of the valve there is a groove (23), the conical side wall (42) and radially spaced ribs (44), contributing drain valve water condensate.

The valve element (34) is made of two different materials: the main part is made of solid, preferably fire-resistant material, and passing through the outer edge portion (38) is made of soft, elastic material.

Grid (16, 36) consist of elements having in cross section the shape of a teardrop-shaped aerodynamic profile.

The grating (36) consists of Alami, when too much pressure in the sewer system, or in case of fire rests against the valve element (34).

Brief description of drawings

On the appended drawings shows:

in Fig.1 - bitmap image is proposed in the invention of the valve, consisting of three main parts;

in Fig.2 - cut the valve according to Fig.1 in assembled form;

in Fig.3 - the image in an enlarged scale of a fragment of the valve according to Fig.2, which shows the operating elements of the valve and, in particular, its valve element rests on the valve seat;

in Fig.4 is a top view of the lower part of the valve body with two inlet Windows and two Windows, through which the air passes into a connected with the sewer system pipe;

in Fig.5 - one of the parts of the valve body in the cut plane a-a in Fig.4;

in Fig.6 - cut the bottom of the valve body plane In Fig.4;

in Fig.7 is a side view of the lower part of the valve body in the direction shown in Fig.4 arrow P;

in Fig.8 and 9, a separate section of the valve body planes C-C and D-D in Fig.7, respectively; and

in Fig.10 is similar to Fig.2 cut proposed in the invention of the valve in the assembled condition, made by other air intake valve, it is shown in Fig.1 has a housing 10, the lower part of which is made in the form of a vertical pipe 12, which valve is connected with a pipe (not shown), which is part of a sewage system in which water discharged from various sanitary devices.

The upper end of the pipe 12 proposed in the invention of the valve is made in the form of a closed cone tapering up 13 (see also Fig.2). In the upper conical part 13 of the pipe 12 is provided with two diametrically opposite window 14 for the passage of air, which overlapped filled in the valve body bars 16, preventing the entry of sewer system various foreign objects, including various animals or insects.

The upper conical part 13 of the pipe 12 is located inside the elongated having a cupped shell 20, which is adjacent to the upper edge of the tube 12 and the upper edge 22 which lies in a horizontal plane H passing through the top of the conical part 13 of the pipe 12.

The space between the Cup-shaped shell 20 and the conical part 13 of the pipe 12 is divided by a partition 26 into two mutually perpendicular first and second pairs of diametrically opposite chambers.

The camera of the first pair, which are formed by perehara 20.

The camera of the second pair, which is formed by a partition 26 and the Cup-shaped shell 20 are communicated with the lower tube 12 of the valve through the Windows 14 in the conical part 13 of the pipe 12.

The upper edge of the partition 26 is located near the horizontal plane H and forms with the appropriate form of the seat 24 of the valve.

The valve element 34 rests on the upper edge of the partition 26 and in the normal position when the pressure within the Sewerage system at least equal to atmospheric pressure, is pressed against the valve seat 24, hermetically separating the first pair of chambers 18 of the second pair of chambers 19.

When the pressure inside the sewage system below atmospheric valve element 34 is raised or withdraws from the seat 24, and the chamber 18 of the first pair are connected with the chambers 19 of the second pair, and the pipe of the Sewerage system connected with the lower tube 12 of the valve body, through the open intake valve and enters the surrounding air.

The valve element 34 and the saddle 24 preferably have the form of a "butterfly" with the location along the longitudinal axis of the elongated Cup-shaped shell 20.

The holes 30 in the cupped shell also closed bars 36, which exclude the possibility of influence on the valve element 34 to any outsiders PNIs deaf guiding hole 32, which performs the function of covering fixed guide member for the valve element 34, which in turn has a guide rod or shank, 35 (performing the functions covered rolling guide element) whose dimensions match the dimensions of the guide hole 32.

The valve element 34, which, as the seat 24 has the shape of a "butterfly", is made of two different materials: its main or Central part 34 is made of solid plastic, and walking on the outer edge portion 38 is made of soft plastic.

These two parts of the valve element are connected to each other accompanied by the melting of the plastic by heating, preferably by the method described in EP 0701504.

The valve element 34 rests on the saddle 24 only its exterior, made of soft elastic plastic edge 38, which provides the necessary tightness normally held in the closed position (see also Fig.3) valve.

In the proposed invention the valve also has a device that prevents the accumulation and long-term presence in the valve body of water condensate.

As shown in Fig.3 and 4, in the area of the valve, located between Oromo top of him falling in drops of water condensate flow connected to the sewage system pipe 12.

To facilitate the admission of air into the valve grid 36 of the intake window 30 is made, as shown in Fig.8 and 9, of the elements of aerofoil or teardrop-shaped cross-section.

At least two of the ribs 37 of the lattice, it is preferable to perform with protruding into the valve and having a flat upper edge areas, in which when there is too much pressure in the sewer system abuts the valve element 34. In case of fire in the sewer system in the same projections of the ribs 37 of the grating rests and is made of fire-resistant material, the main part of the valve element 34. Obviously, when there is too much pressure in the sewer system, or in case of fire, the valve element 34 with soft and supple outer edge 38 may be lowered into the valve body and stay (in case of fire) on the projections of the edges of the lattice in the plane below the plane of the seat 24 of the valve.

It is obvious that the edges of the grating 16, the closing of the window 14, it is also possible to give in the cross-section of an aerodynamic teardrop shape.

And finally, on top of the housing 10 of the valve is closed by a cover 40, which is tightly pressed against the upper edge 22 of the Cup-shaped shell 20.

water condensate. For the same purpose, and the upper wall of the cover 40 is made slightly rounded on its inner surface has radial ribs 44 on which drops of water condensate flowing to the outer edge (side) of the cover.

When the pressure in the sewer system below atmospheric valve element 34, on the lower surface of which is atmospheric pressure on the higher pressure in the sewer system rises quickly, and atmospheric air through the inlet box 30 and the vertical gap between the seat 24 of the valve and the outer edge 38 of the valve element 34, and through the window 14 of the pipe 12 passes into the pipe of the Sewerage system.

Proposed in the invention of the valve, in particular a valve, in which the working surface of its main functional elements, i.e., the valve element 34 and the seat 24, have a characteristic form of "butterfly" is, on the one hand, a maximum force of lifting the valve element, and on the other hand, a uniform distribution of air flow passing through the valve body.

For uniform distribution of the air flow passing through the valve, it is important that the total area of the channel for the passage of air formed by the exposed functionality of the Oia optimal throughput of the valve is important to the total area of the channel for the passage of air formed open functional elements 24, 34 of the valve, was essentially equal to the total area of the channels 14 for the passage of air in the direction of the sewer system throughout the journey from functional elements of the valve to the window 14, and is also equal to the internal area of the pipe 12.

To improve the efficiency of the valve, in particular for increasing the effort of lifting the valve element 34 from the seat 24, it is important that the ratio of the total area of bore hole bounded by an outer edge of the seat 24, to the total area of the openings between the seat 24 and the inner surface of the bowl-shaped shell 20, forming a zone of possible pressure drop, it is preferably less than 1.

If the valve more than two inlet Windows, or holes located between the outlet Windows, the number of which is equal to the number of inlet boxes, accordingly should be changed and the shape of the valve element, and the shape of the valve seat. In this case, the valve element (and saddle) should be made not in the form of a "butterfly", and in the form of a triangle or trilistnika.

Another option proposed in the invention of the valve with other construction nab is rhna cover 50 is made, at least two protruding guide rod 52 (still covered guiding elements) located in the horizontal plane H of the lower ends of which enter into corresponding guide holes 62 (movable covering guiding elements) made in the appropriate tabs on the main part of the valve element 64.

When lifting the valve element 64 is moved along the guide rods 52 of the top cover 50, which is fixed in the guide hole 62 of the valve element. In this way the valve as it ascends the number passing through the air valve will increase, because the hydraulic resistance placed on its tabs with the guide holes 62 will at least reduce the length of their plots located within the air flow, gradually be reduced.

For the best moving valve element in such a guide device protruding rods 52 of the cover can be made of metal.

In the proposed invention the valve device, guiding the movement of the valve element during its raising and lowering, you can run consisting of either a fixed covering the areas the Yu valve element, or from still covered by the guide elements (rods) 52 and movable covering the guide elements (holes) 62, which is part of the valve element.

Experiments showed that the proposed invention the inlet air valve has compared to existing valves significantly more capacity.

The above options are only illustrative of the invention in the scope of the following claim implies the possibility of making and various other changes and modifications.

The list of entries on drawings:

10 - the valve body

12 - trumpet

13 - upper conical part of the tube 12

14 - open for the passage of air to the upper part of the valve

16 - grille

18 camera first pair of

19 - chamber of the second pair of

20 - elongated bowl-shaped shell

22 - the upper edge of the shell 20

24 - valve seat

23 - trough

26 - partition

28 - closed sections of the conical part 13 of pipe

30 - intake Windows

32 - routing hole

34 - valve

35 - guide rod or shank

36 - grate inlet window

37 - the edge of the lattice, in which abuts the valve element

38 - external is>/p>52 - guide rods

62 - guide holes

64 - valve element

Claims

1. Air intake valve, which is connected with the pipe of the Sewerage system and through functional elements which when the pressure in a pipe connected to the sewage system, enters the surrounding air, which protects the existing Sewerage system / water separators-gates and prevents the ingress of the surrounding atmosphere of the sewer system which has an unpleasant odor air, with such a valve has a housing (10) comprising a tube (12) through which the valve is connected with the pipe of the Sewerage system and which in the upper part (13) is made in the form of a gradually tapering to the apex of the cone, at least one window (14), through which the internal cavity of the tube is connected with the functional elements (24, 34, 64) of the valve, valve seat and valve element, the cover (40, 50), which is located above the upper part (13) of the pipe (12) and the upper wall of which is at a distance from the upper part (13) of the pipe (12), the valve element (34, 64) located between the upper part (13) of the pipe (12) and the upper wall of the lid (40, 50), when this valve El is th plane H, passing near the top of the conical part of the tube (12), and is free to move upward relative to the seat, and at least one inlet window (30), through which the inside of the valve enters the surrounding air and which is communicated with the lower surface of the valve element (34, 64), the upper surface of which communicates with the sewer system at least through one window (14), resulting in a pressure sewer system, equal to or greater atmospheric, the valve element (34, 64) closes the valve, and when the pressure in the sewer system, less atmospheric, the valve element (34, 64) opens the valve, and when the pressure in the sewer system becomes less than atmospheric, ambient air passes into a connected sewer system pipe, characterized by the presence in the body (10) at least two inlet window (30) and located between at least two Windows (14), through which air passes into the sewage system, while these specified window (30) and (14) are uniformly distributed inside the valve in cross section a horizontal plane, passing near plane N, which is the valve seat.

2. The intake air valve under item 1,and elements (24, 34, 64) of the valve, valve seat and valve element is essentially equal to the total area of the inlet window (30) and the total area of the Windows (14) for the passage of air from the functional elements of the valve in the sewer system.

3. The intake air valve on PP.1 and 2, characterized in that the total area of the channel for the passage of air formed open functional elements (24, 34, 64) of the valve, valve seat and valve element is essentially equal to the area of the inner bore of the pipe (12).

4. The intake air valve under item 1, characterized by the presence in the body (10) of the valve shell (20) and a partition (26), which divides the inner space of the shell into separate cavity with a uniform distribution of the air stream flowing through the valve with exposed functional elements (34, 64) of the valve, valve seat and valve element over the entire inner space of the valve body from the inlet window (30), through which the inside of the valve enters the surrounding air, and to check boxes (14), through which the air passes into a connected sewer system pipe.

5. The intake air valve on p. 4, characterized by the presence in the body (10) of the valve outstretched cupped shell (20) and Penghu pair first (18) and second (19) cameras when this camera (18) of the first pair are communicated with the surrounding atmosphere through the window (30) in the shell (20) and the chamber (19) of the second pair are connected with the lower tube (12) of the valve body and the sewage system through the Windows (14) in the upper tapered part (13) of the pipe (12).

6. The intake air valve on p. 5, characterized in that the chamber (18) of the first pair and the camera (19) of the second pair are located at equal distances from each other in the cross section of the valve horizontal plane H and provide an even distribution of airflow through the enclosure (10) of the valve.

7. The intake air valve under item 1, characterized in that the upper tapered portion (13) of the pipe (12) is made from top closed and has at least two located on the sides of the window (14), separated from each other closed areas (28).

8. The intake air valve under item 1, characterized in that the two inlet window (30), through which the inside of the valve hits the air, are located diametrically opposite each other on a line perpendicular to the line connecting the two diametrically opposite the window (14) through which air enters the sewage system.

9. The intake air valve on p. 5, characterized in that the inlet window (30), through ketoret (13) of the pipe (12), the upper edge (22) of the shell (20) is located near the plane H of the valve seat.

10. The intake air valve under item 1, characterized in that the seat (24) of the valve has a continuous impervious to air, the surface coming down along with the partition (26), which divides into separate chambers of the internal space of the shell (20), respectively, between the Windows (14) and closed areas (28) tapered part (13) of the pipe (12).

11. The intake air valve on p. 5, characterized in that the sealing surface of the functional elements of the valve, i.e. its seat (24) and the corresponding valve element (34, 64), has essentially the form of a "butterfly", which is located along the longitudinal axis of the elongated shell (20) of the valve body.

12. The intake air valve on p. 11, characterized in that the ratio of the total area of bore holes having the form of a "butterfly" seat (24) of the valve to the total area of the openings between the seat (24) of the valve and the inner surface of the cupped shell (20), forming a zone of possible pressure drop, preferably less than 1, which allows to get the maximum effort of lifting the valve element (34, 64) on the seat (24) of the valve.

13. The intake air valve under item 1, distinguished by the different presence on the valve element (34) covered the sending kernel (35), which interacts with covering the guide hole (32) made in the housing (10) of the valve.

15. The intake air valve on p. 1, wherein the valve element (64) covering the guide hole (62), which interacts with a fixed covered in the guide rod (52) located on the cover (50) of the housing (10) of the valve.

16. The intake air valve under item 1, characterized by the presence on the inner surface of the housing (10) of the valve trough (23), the conical side wall (42) and radially arranged ribs (44), contributing drain valve water condensate.

17. The intake air valve under item 1, characterized in that the valve element (34) is made of two different materials: the main part is made of solid, preferably fire-resistant material, and passing through the outer edge portion (38) is made of soft, elastic material.

18. The intake air valve on p. 13, characterized in that the grating (16, 36) consist of elements having in cross section the shape of a teardrop-shaped aerodynamic profile.

19. The intake air valve on p. 13, characterized in that the grating (36) consists of elements, at least two of which have virtualsystem sewer, or in case of fire rests against the valve element (34).

 

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The invention relates to the protection of waters, in particular to the prevention of pollution of surface waters by rain water, which is diverted from the urban area

Internal drainage // 2228410
The invention relates to the field of construction, namely, the design of the systems of internal sewer lines buildings
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