Valve unit for heating system

FIELD: heating.

SUBSTANCE: valve unit (1) includes housing with inlet (2) and outlet (3), valve 1 (6) with seat (8) and gate (7) and valve 2 (10) providing stable pressure drop at valve 1 (6). Valve 1 (6) is located in the first part of unit body (A) whereas valve 2 (10) is situated in the second part (B) of unit body. Besides, first part (A) and second part (B) of unit body are interconnected. Pressure transfer channel (28) from outlet (3) to membrane side (24), which is opposite to valve 1 (6) crosses parting surface (C) between the first (A) and second (B) parts of unit body.

EFFECT: simplification of valve unit design.

10 cl, 2 dwg

 

This invention relates to a valve device for heating system. This device includes a housing with inlet and outlet, the first valve seat and the valve and a second valve, maintaining constant the differential pressure at the first valve. The housing comprises first and second parts connected to each other, and the first valve is fully placed only in the first part of the body.

Such a valve device is known from WO 01/13017 A2. In the valve device of this type the second valve is designed to maintain a constant differential pressure at the first valve regardless of the pressure at the inlet and outlet. This allows you to adjust the fluid flow, i.e. the amount of fluid flowing through the second valve, depending on the bore of the valve, in other words, the distance between the valve seat and gate.

This valve device, where the second valve is provided with a constant differential pressure at the first valve, in particular, should be used in Central heating systems, otherwise in these systems, there is a risk that the pressure in the valve radiator negative way to influence the flow in the other radiators. This problem is largely eliminated due to the second valve.

However, this advantage on the present time had to pay those what valve device had a relatively large structural size.

From DE 19824630 A1 known one valve device with the throttle and Governor valve. This device, consisting of three valves, regulating diaphragm, throttle and control valve, designed to control a flow rate and pressure drop. All valves are mounted in a single compact housing. This enclosure consists of two parts connected with each other. One part of the body includes a throttleandregulatorya valve.Regulatoryaperture located axially with respect to the input and output holes placed in both parts of the casing of the valve device.

The basis of the invention lies task is to simplify the construction of the valve device.

Valve device for heating systems mentioned at the beginning, this problem is solved due to the fact that the first valve is installed in the first part of the housing, a second valve in the second part of the housing and the first and second housing parts are connected to each other.

This solution was able to achieve a very compact design of the valve device, i.e. for installation of the valve device requires a relatively small space. In addition, in this case, it is possible to do a relatively small amount of the om components. Manufacturing is simplified because both parts of the case is made separately, together with the corresponding valve. If necessary, these parts can be tested for proper operation. Also simplified the process of picking. This applies both to the production and supply of spare parts. You can easily combine any of the first and second valves. The only prerequisite is that both parts of the housing must be connected to each other. The connection is directly to the parting surface of both parts of the body.

The second valve preferably has an aperture, operate the shutter for regulating the pressure, and the diaphragm is fixed between the first and second housing parts. Aperture has two functions. First, as mentioned above, it actuates a shutter for regulating the pressure, that is, the gate of the second valve. Secondly, the diaphragm seals the connection between the first and second housing parts. This facilitates the manufacturing process of the valve device.

This channel of transmission of pressure from the outlet to the side of the diaphragm that faces towards the second valve, preferably passes through the parting surface between the first and second housing parts. This simplifies the design. There is no need to run outside around the orpus separate channels. Despite the division of the body into two (or more) parts of the transmission channel pressure can be carried out, as is done in ordinary differential pressure regulators.

Preferably the transmission channel pressure outside the diaphragm. Thus, in the diaphragm no holes intended for the transmission channel pressure. Through this aperture retains its original shape. The risk of injury remains small, the service life of the valve device is increased.

Preferably the diaphragm is made centrally symmetric. Despite the presence of the transmit channel load on the diaphragm remain symmetric. Aperture can have, for example, round surface. It also reduces the risk of stress that may occur in unwanted directions, so aperture is relatively long.

Preferably regulating the pressure of the shutter of the second valve are in the form of a hollow cylinder. Thus, the current flowing through the radiator network liquid coolant passes through the regulating shutter. This place provided a relatively large cross-section of flow. This gives the advantage that external throttling element, which is actually the second valve, there is only a small pressure drop. It also reduces the potential for the ity of occurrence of noise.

Preferably the regulating stopper is configured to move inside the insert attached to the second side of the housing. This simplifies the manufacture. The second part of the case is made with relatively large tolerances and yet due to the application of the specified insertion sufficient precision movements of the control gate. Between the gate and insert the installation of the seal. Also provided by the use of seals for securing the insert in the second part of the housing. As the seals can be applied-ring or other sealing ring.

When this insert is preferably screwed into the second part of the housing. The risk that the load acting on the insert is able to rotate. Thus, the screwing of the insert is a relatively simple option, which allows you firmly into the housing in the desired position, including for a long time.

The second valve preferably includes a support valve seat fixed to the protrusion in the second part of the housing. It also simplifies the design of the second part of the housing. In addition, the housing in the area of the valve seat does not require the manufacture of extremely high accuracy. Thanks to this support the valve and valve seat are located relative to each other rises with the great precision.

With this reliance valve seat preferably has a body coated and fastener. Properties of the coating correspond to the nature of the flow. The coating, for example, can be designed in such a way as to reduce noise of the flowing fluid. The case is strong enough to support the valve seat was secured with adequate reliability.

Preferably the first and second housing parts have meet each other apertures through which pass clamping bolts. Thus, the connection of the two housing parts made by bolts, which can be either screwed in one of the two housing parts or are secured with nuts.

Hereinafter the invention is described in more detail based on the example of the preferred design. Description accompanied by the drawings. In the drawings shows the following:

figure 1 - schematic longitudinal section of a valve device for heating systems;

figure 2 - valve device, top view.

Valve device 1 for heating system has a housing consisting of two parts a And C. In the housing has an inlet 2 and outlet 3. To the inlet 2 of the attached pipe 4, through which is fed a liquid coolant, such as hot water from the Central heating system. To the outlet 3 connec the n a radiator 5, the drawing shows only fitting to attach the heat sink.

For controlling the flow of fluid flowing from the inlet 2 to the outlet 3, provides the first valve 6, which has the shutter 7. The shutter 7 is arranged to move relative to the seat 8. The shutter 7 is pre-strained in the direction of opening from the seat 8. In the direction of closing the shutter is actuated by means of the extracted output shaft 9. The rod 9 is made with the possibility of exposure to the temperature-controlled nozzle of a known type, which is not shown in detail here. The first valve is in the first part And the body.

When attaching the specified valve 6 to the pipe 4 of the heating system, which supplies water to a number of radiators, the pressure in the area of the inlet 2 depends, in particular, the degree of opening of the other attached to the pipe 4 heating system radiators. While this pressure affects the flow of coolant between the gate 7 and seat 8.

To exclude the influence is, in the valve device 1 has a second valve 10, a constant differential pressure at the first valve 6. Thus, the second valve 10 is a pressure regulator. This valve is placed in the second part of the hull.

The second valve 10 includes a shutter 11, which interacts with the saddle for 11 made in the form of a hollow cylinder. Thus, the fluid passing through the gap 13 between the shutter 11 and seat 12, enters through the gate 11 into the chamber 14. The camera 14 is located at the entrance to the first valve 6.

The saddle 12 is adjacent to the support 15 attached to the projection 16 of the second part In the housing with the screw 17, which plays the role of the fastening element. Bearing 15 of the valve seat includes a housing 18 with the screw 17 and the cover 19.

Both parts of the housing And joined to each other along the surface of the connector and are connected to each other.

Regulating the pressure of the bolt 11 passing through the insert 20, is screwed into the second part of the housing. Between the insert 20 and the second part In housing provided by the seal 21, for example, in the form of a sealing ring of round section. The seal is also provided between the shutter 11 and the insert 20. Using a pressure spring 23, the shutter 11 is loaded in the direction from the bearing 15 of the valve seat.

Regulating the shutter 11 is connected with a diaphragm 24, permeates through the specified aperture 24, the surface of which is partially adjacent to the base plate 25. The support plate 25 is also connected to the gate 11. Aperture 24 is made with bead 26 on the circumference. The outer edge 27 of the diaphragm is sandwiched between the first and second housing parts. Thus, the aperture 24 performs two tasks. First, it is designed to overcome the force of spring 23, peremeshati shutter 11 then when the pressure in the chamber 14 exceeds the force of the spring 23. Secondly, the aperture 24 is used for the outer seal of the pressure chamber 14, and the connection between the first and second part of the hull.

Aperture 24 is installed in the Central-symmetrically relative to the centerline of the shutter regulating pressure, which is not shown in detail here. Aperture is set so that when a compressive load is, in fact, not having any transverse strain.

The channel 28 of the transfer pressure passes from the outlet 3 to the chamber 29 on the same side of the diaphragm 24, which is the opposite of the camera 14. This channel 28 passes through the surface of the connector C. incidentally, the camera 29 is limited by the diaphragm 24, the control gate 11, the insert 20 and part of the body.

The second valve 10 essentially performs only the function of a regulator of pressure of the first valve 6. Due to the connection with the diaphragm 24, the shutter 11 is the position in which the pressure in the chamber 14, that is, above the diaphragm 24 corresponds to the amount of pressure in the chamber 29, that is, under the diaphragm 24, and the tension force of the spring 23. The pressure in the chamber 14 is the pressure before the first valve 6 and the pressure in the chamber 29 is the pressure at the outlet 3, that is, the first valve 6. Thus, regulating the shutter maintains a constant differential pressure at the first valve 6, according to stuudy the force of the tension spring 23, regardless of the pressure at the inlet 2 and the outlet 3.

In this case, the first valve 6 is, in essence, is a regulating valve that regulates the flow network of the liquid coolant, and a greater or lesser degree of opening of the valve 6 causes an increase or decrease of fluid flow. Pressure control by means of the second valve 10 leads to a rigid connection between the degree of opening and fluid flow, as it maintains a constant differential pressure.

As can be seen from figure 1, the first valve 6 is located only in the first part And the housing, and the second valve 10 is only in the second part of the housing. The corresponding valve device is the result of the connection of the two parts And, In the case. When combining both parts And, on the surface of the connector and they are connected to each other by means of bolts passing through holes 30. The bolts on the drawing in detail is not shown.

When both parts And, In the case disconnected, they are open at the surface of the connector, therefore, to mount these parts together with the inserted them valves 6, 10 is relatively easy. The clamping area free access, it is available also the internal parts of both parts And, In the case. Due to the fact that the diaphragm 24 is clamped between the parts And, In the case, no additional seal.

1. Valve device for heating system, comprising a housing with an inlet and outlet, the first valve seat and the valve and a second valve, maintaining constant the differential pressure at the first valve, and the housing comprises first and second parts connected to each other, and the first valve is fully placed inside the first part of the housing, characterized in that the second valve (10) is entirely located only in the second part (In) the body, and there is a channel (28) transfer of pressure from the outlet (3) to the same side of the diaphragm (24), which is the opposite of the first valve (6)passing through the surface of the connector (S) between the first (a) and second (B) parts of the body.

2. Valve device for heating system according to claim 1, characterized in that the second valve (10) includes a diaphragm (24), resulting in the effect of regulating the pressure of the bolt (11), and aperture (24) is sandwiched between the first (a) and second (B) parts of the body.

3. Valve device for heating system according to claim 3, characterized in that the channel (28) of the pressure transfer is outside the aperture (24).

4. Valve device for heating system according to claim 3, characterized in that the aperture (24) is performed centrally symmetric.

5. Valve device for heating system according to any one of claim 2 to 4, characterized in that the regulating pressure Sato is (11) of the second valve (10) is made in the form of a hollow cylinder.

6. Valve device for heating system according to any one of claim 2 to 4, characterized in that the regulating pressure of the shutter (11) is held inside the insert (20)fixed in the second part (In) the body.

7. Valve device for heating system according to claim 6, characterized in that the insert (20) is screwed into the second part of (In) the body.

8. Valve device for heating system according to any one of claims 1 to 4 or 7, characterized in that the second valve (10) includes a bearing (15) of the valve seat fixed to the protrusion (16) in the second part (In) the body.

9. Valve device for heating system of claim 8, characterized in that the bearing (15) of the second seat valve has a housing (18) with a fastener (17) with a coating (19).

10. Valve device for heating system according to any one of claims 1 to 4, characterized in that the first (a) and second (B) part of the case is made to meet each other holes through which pass clamping bolts.



 

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