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IPC classes for russian patent Inspection pit hatch (RU 2280735):
Another patents in same IPC classes:
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Hatch comprises body and lid. The body includes metal frame with ribs and covered with polymeric composition. The lid is made as vertical rod, face panel and base panel and is provided with metal sheets secured to rod, face panel and base panel. The face panel and base panes extend transversely to the rod. The metal sheets taper towards base panel and form removable frame filled with polymeric composition.
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Cover for manhole shaft / 2244069
Cover comprises base, fixed rests and sliding rest located diametrically opposite to fixed rests and having stop and locking device. Fixed and sliding rests are arranged on cover base from support surface side. Movable rest is made as flat cam member with stop groove and key orifices. Cam member has central key orifice corresponding to key orifice formed in cover base. Locking device is made as rotary plate performing rotation around its axis and having short and long shoulders. Rotary plate includes counterweight and stop member arranged on long shoulder from opposite axis sides. Stop member may cooperate with flat cam member groove. Short shoulder may close central key orifice made in cam member when stop member is arranged in cam member groove.
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Access chamber hatch / 2278215
Hatch comprises body and lid. The body includes metal frame with ribs and covered with polymeric composition. The lid is made as vertical rod, face panel and base panel and is provided with metal sheets secured to rod, face panel and base panel. The face panel and base panes extend transversely to the rod. The metal sheets taper towards base panel and form removable frame filled with polymeric composition.
 Inspection pit hatch / 2280735
Hatch comprises support ring with annular groove and reinforced lid with through orifices and lower part converging downwards. Upper lid part also converges downwards. Angle between side surface of upper lid part and vertical line is from 5° to 10°, angle between side surface of lower lid part and vertical line is equal to 25°-30°. Upper and lower lid part height ratio is 1:5 - 1:3. Two through orifices have elliptical cross-sections and are provided with steel pipes closely fitted in the orifices. The orifices are diametrically symmetric about lid center and are located from both sides of the center. Orifice ellipse axes ratio is from 2:3-2.5:3.5 and larger orifice ellipse axis has length equal to 1/15-1/20 of lid diameter. The lid and support ring are formed of high-strength concrete.
 Man-hole / 2293698
Invention relates to facilities designed for servicing high-pressure sealed equipment, such as boilers, collectors, recuperators. Proposed man-hole has oval cover. Said cover is arranged inside reservoir and is attached to movable support welded to inner surface. Central part of cover is made additionally from thin sheet in form of ellipse being pointed by convex surface inside reservoir. Stops and ribs are welded on concave surface of cover perimeter. Detachable oval half-rings provided with slots are arranged on ribs. Pressure ring is arranged on end face of oval collar secured in hole of reservoir. Detachable half-rings are clamped, together with pressure ring, by fasteners and form cover sealing device. Oval gasket is fitted n groove on end face surface of cover.
 Locking device for object to be protected, mainly for inspection pit hatch / 2306387
Locking device for inspection pit hatch, which is installed in orifice made at protected object base, comprises locking member and rotary bolt. The rotary bolt includes rod with key-operated head and locking means connected to opposite end thereof. Orifice made in base of protected object additionally has socket to receive rod head with locking member made as signal member and having shape corresponding to that of the socket so that it be secured to head in axial direction and in direction of head rotation. Signal member is made as plate provided with members cooperating with head for head fixation in axial direction and in direction of head rotation. Plate member, which prevents head rotation, has surface mating to that of key socket. Fixing member is shaped as radial teeth comb in axial direction thereof. The teeth are provided with L-shaped projections created at teeth ends and enclosing the head. Space between head and teeth flange surfaces provide interference fitting thereof. Signal plate is installed to completely close access to key-operated head.
 Inspection well hatch / 2307213
Inspection well hatch comprises support ring with orifice, reinforcing belt extending along inner contour thereof, support base, reinforcing cage and lid. The reinforcing cage includes inner ring of sheet metal and/or profiled metal and round steel rod connected thereto by means of fixedly secured partitions. Lid has support surface and reinforcing cage including outer ring made of sheet metal and/or profiled metal, lower reinforcing mesh fixedly connected thereto, round steel rod and upper reinforcing mesh. The reinforcing cages are filled with non-metal binding material. The round steel rods of support ring and lid are pre-stressed and cooperate with at least 12 reinforcement posts uniformly distributed along annular rod perimeter inside thereof.
 Method for inspection well hatch manufacturing / 2307214
Method involves installing reinforcing cage of support ring and reinforcing cage of lid in mold bottom plate, wherein reinforcing cage of support ring includes inner ring formed of sheet metal and/or profiled metal and round steel rod connected to the inner ring by means of fixedly secured partitions, reinforcing cage of the lid includes outer ring made of sheet metal and/or profiled metal, reinforcing mesh fixedly connected thereto, round steel rod and upper reinforcing mesh; pouring non-metal binding material into the mold bottom plate, wherein above round steel rods of support ring and lid are pre-stressed by heat-treating thereof before filling with binding material and by tightening round steel rods with stretchers, wherein the stretchers are made as at least 12 reinforcement posts uniformly distributed along annular rod perimeter inside thereof and rigidly fastened to mold bottom plates; providing binding material strength generation; removing the ready articles from molds and cutting projected bar ends.
 Inspection well hatch lid / 2310043
Inspection well lid has base, at least one fixed thrust and one movable rotary thrust provided with locking means arranged along a circle from the side of support lid base surface. Locking means is made as indicating member, which retains movable thrust and is damaged during movable thrust rotation. Lid has through orifice and indicating member recess, which are made along movable thrust rotation axis. The recess is formed from outer lid surface. Indicating member conform the recess and is forcedly fitted inside the recess below outer lid surface or is flush therewith. In particular case movable thrust is made as locking plate, which may rotate by key from outer side thereof. The key is inserted from outer lid side in through orifice made in lid. Indicating member is made as plastic plate with members, which prevent indicating member removal from lid and with member and/or members, which cooperate with movable thrust axis to restrict the movable thrust from rotation. Plate blocks access to movable thrust axis. Locking plate may be secured to threaded rod having head to be engaged by wrench with the use of nut. In another particular case lid additionally has orifices for mounting thrust members receiving.
 Locking device for inspection pit hatch locking / 2315838
Locking device comprises rotary rod and locking member installed in orifice made in inspection pit hatch base. Rotary rod has engagement member created in upper end thereof. Locking member is provided with indication means arranged in upper locking member part and adapted to be installed in said orifice to prevent access to engagement member. Engagement member has head to be engaged with key. Indication means is created as plate mating to orifice made in the base. The plate has teeth defining comb structure. The teeth are diametrical about axis of rotation and are spaced a distance providing key installation therefrom. The teeth have L-shaped extensions at teeth ends so that extensions enclose engagement member from below. Rotary rod has control washer to provide space for teeth extension passage and retaining. Indication means may be formed of colored plastic. Plate may have individual number formed on outer plate surface.
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FIELD: road building, particularly covers for manholes or the like.
SUBSTANCE: hatch comprises support ring with annular groove and reinforced lid with through orifices and lower part converging downwards. Upper lid part also converges downwards. Angle between side surface of upper lid part and vertical line is from 5° to 10°, angle between side surface of lower lid part and vertical line is equal to 25°-30°. Upper and lower lid part height ratio is 1:5 - 1:3. Two through orifices have elliptical cross-sections and are provided with steel pipes closely fitted in the orifices. The orifices are diametrically symmetric about lid center and are located from both sides of the center. Orifice ellipse axes ratio is from 2:3-2.5:3.5 and larger orifice ellipse axis has length equal to 1/15-1/20 of lid diameter. The lid and support ring are formed of high-strength concrete.
EFFECT: increased reliability.
2 dwg
The present invention relates to road construction, in particular to the structures manholes inspection chambers.
Known inspection hatch well, made from cast iron castings and including a housing, the bearing surface of the housing and the cover (see, for example, GOST 3634-99 "Manholes inspection chambers and gullies. Appendix A. Rice". This type of hatch is the most common ("hatch General purpose") and installed on thermal, gas and cable networks, water supply and sanitation. However, the cast iron as a structural material is very fragile and poorly perceives tensile stresses, which are mainly experiencing manhole cover.
Also known inspection hatch well, which does not cover all cast iron: it has a recess in the form of spheres for filling with concrete grade not lower than 30 (see ibid. Appendix a, RIA). The disadvantage of this hatch is the difficulty and complexity of manufacturing the hatch covers: the thickness of the concave surface (sphere) than 40-50 mm, which is associated with the need to ensure the high pressure stamping process covers much more complicated.
Closest to the proposed technical solution is the inspection hatch well, including a support ring with an annular groove and a reinforced cover with a through hole and narrowing down the bottom is the art (see, for example, patent RF №1715993, CL E 02 D 29/14, 1989). When exposed to a vertical movable load on hatch last perceives its reinforced lid made with a spherical convex surface. Curving, the cover tends to occupy a horizontal position, clamping the inner surface of the support ring and increasing, thus, a stable position of the cover by reducing the degree of movement of the cover in the horizontal direction. However, made from a polymer material cover can not withstand the impact of significant vertical moving loads.
The purpose of the present invention is to enhance reliability of the hatch observation well.
The technical result is achieved by the fact that the inspection hatch well, including a support ring with an annular groove and a reinforced cover with a through hole and a narrowing down of the lower part, the upper part of the cover is also made tapering downward, and the angle formed by the side surface of the upper part of the cover with a vertical axis, is in the range from 5° to 10°and the lower part of the cover is between 25° to 30°; the ratio of the heights of the upper and lower parts of the cover is in the range from 1:5 to 1:3; two through holes made elliptigo section supplied with steel tubes closely adjacent to the walls of the holes, which are located on the diameter of the cap is symmetrical about its center and on opposite sides thereof. the ratio of the axes ellipse cross-section of the holes is in the range from 2:3 to 2.5:3.5 and the value of the major axis of the ellipse in the range from 1/15 to 1/20 of the diameter of the cover, and made the cover and the support ring made of high-strength concrete grade not lower than the M500.
The essence of the proposed technical solution consists in the following. The manufacture of the cap, the upper part of which as well as the bottom, is made tapering from top to bottom, provides the most stable placement of the cover in the reference case of the hatch. Moreover, the corners formed by the side surfaces of the upper and lower parts of the cover and selected within correspondingly from 5° to 10° (upper part) and from 40° to 45° (bottom), not only provide the necessary performance characteristics of the cover when lifting and planting it in the support ring of the hatch, but also prevent slippage and possible subsequent rolling her when shifted (relative to the center of the cover) vertical load. The use of high-strength concrete grade not less M500 for the manufacture of manhole significantly (more than twice) to increase the rated load on the hatch so that you can install it instead of the expensive cast-iron hatches in the areas of most high vertical loads (on the main roads, airfields, docks and so on).
Figure 1 shows the inspection hatch decks is a, vertical section; figure 2 is a view in plan.
Made of concrete grade not lower than M500 inspection hatch well includes a support ring 1 with the annular groove 2 and the cover 3 made with through-holes 4, intended for installation in them lifting brackets and made ellipse section. Holes supplied with steel tubes closely adjacent to the walls of the holes and located on a diameter of the cover 3 is symmetrical about its center and on different sides of him. The ratio of the axes of the cross section is selected in the range from 2:3 to 2.5:3.5, and the magnitude of the major axis of the ellipse is from 1/15 to 1/20 of the diameter of the cover. The upper edge of the cover 3 and the support ring 1 is made with an annular flange 5, a component with a vertical axis an angle in the range from 40° to 45° and having a width in the range from 0.01 to 0.03 average diameter of the cover and designed to prevent chipping of the edges of the product when installing the hatch cover in the bearing ring. The lower part of the edge can be provided with an annular rubber gasket. The upper part of the cover 3 as well as its lower part, made tapering down. Moreover, the side surface of the upper part of the cap forms a vertical axis angle α size 5° to 10°, the lower part of the cover - corner β a value of 25° to 30°and the ratio of the heights of the upper and lower parts of the cover SEL is given in the range from 1:5 to 1:3. This design of the hatch cover provides reliable and placing it in the support ring, the most satisfactory operational characteristics of the hatch. Manufacturer hatch observation well with parameters beyond that provided in the proposed technical solution, not allow it to achieve its goals.
When exposed to a vertical movable load on the inspection hatch well preemptive load perceives cover 3 hatch. Resulting in the cover tensile stress substantially removed through the use of for making the proposed hatch high-strength reinforced concrete grade not lower than the M500, the tensile strength reaches relatively high values. Rated load on this hatch can be significantly improved in comparison with the load provided by the state standard for the most common cast-iron hatches. When shifted (relative to the center of the cover) vertical load cover tends to roll over. However, in the proposed design of the cover mating upper and lower part are angled relative to each other and thereby form a "lock"to prevent slippage and subsequent turning of the cap, and hence the emergence of an emergency.
Before agema design of the hatch observation wells can significantly improve the reliability of the hatch.
Inspection hatch well, including a support ring with an annular groove and a reinforced cover with a through hole and a narrowing down of the lower part, characterized in that the upper part of the cover is also made tapering downward, and the angle formed by the side surface of the upper part of the cover with a vertical axis, is in the range from 5 to 10°and the lower part of the cover is in the range from 25 to 30°; the ratio of the heights of the upper and lower parts of the cover is in the range from 1:5 to 1:3; two through holes made elliptigo section placed in them steel tubes closely adjacent to the walls of the hole, and located on a diameter of the cap is symmetrical about its center and on opposite sides of it; the ratio of the axes ellipse cross-section of the holes is in the range from 2:3 to 2.5:3.5 and magnitude of the major axis of the ellipse, in the range from 1/15 to 1/20 of the diameter of the cover, and made the cover and the support ring made of high-strength concrete grade not lower than the M500.
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