RU2702791C1 - Manhole cover with retainer and damping lining of manhole cover - Google Patents

Abstract

FIELD: construction; manufacturing technology.

SUBSTANCE: group of inventions relates mainly to covers of manhole covers of engineering structures, rainwater receptacles, in particular to covers of hatches with retainers, preventing spontaneous opening or displacement of cover from the seat of the manhole when motor transport. Manhole cover of the manhole with retaining device and stiffness ribs located radially on the inner side of the hatch cover and two diametrically opposite lugs for the frame saddles. Manhole cover can contain stiffeners. Cover has a retaining device made in the form of two projections. Projections are made in the form of one-side wedge, with possibility of engagement under frame flange. Note here that one projection is arranged at free end of resilient bracket extending parallel with cover circle nearby its edge. Other end of the bracket is fixed on the stiffness rib, and the second projection is located on the extension of the available stiffness rib located along the lug axis for the frame seat from the opposite elastic bracket of the hatch cover side and is extension of this rib. Existing stiffness rib located along the lug axis of the frame seat on the side of the resilient bracket is made shortened so that between the outer end face of the stiffness rib and the clamp there is a gap restricting the elastic bracket stroke during the hatch cover installation into the frame. To reduce damping loads and to improve coupling of cover and frame surfaces, proposed damping pad gasket of manhole cover with retaining device is applied. Gasket is made in the form of rubber annular cuff of L-shaped section with possibility of installation on surface of horizontal ring platform of inspection well frame.

EFFECT: improved convenience of operation, reduced time of repair of manholes.

3 cl, 2 dwg

Description

The group of inventions relates mainly to manhole covers of inspection wells of engineering structures, storm water inlets, in particular to manhole covers with restraints that prevent spontaneous opening or displacement of the cover from the saddle of the manhole during passage of vehicles.

The presence of holding devices allows you to reliably fix the hatch in the frame of the manhole in order to exclude the possibility of spontaneous opening of the lid during heavy traffic. Such covers can be additionally equipped with locking devices that prevent unauthorized persons from entering the well.

Most manhole covers are made in accordance with GOST 3634-89 from cast iron complete with a body or frame. The frame has at least two diametrically opposite saddles under the response tides of the manhole cover. Covers can be equipped with an elastic soundproofing pad.

In the process of exploitation of manhole covers, damage often occurs, which renders them unusable and theft of covers.

Reconstruction of the manhole requires the replacement of not only the manhole cover, but also its frame. Such repairs require installation work in our place.

The possibility of replacing the manhole cover of the manhole without replacing the frame installed on the manhole allows you to reduce both operating costs and repair time.

Known manhole covers for the manhole with holding devices, from the description of patent CN201078001Y, published 2008.06.25 and patent CN201567591U, published 2010.09.01, which is mounted movably on the frame with the possibility of opening the manhole cover with stiffeners, with spring arcuate brackets located on the bottom the side of the lid between the stiffeners parallel to its plane, with one end of the bracket fixed to the base of the lid, and the other end having a cone-shaped latch interacting with the reciprocal landing element ohms disposed on the frame, and a locking cap when the closure is in the frame.

Fixing the lid on the frame makes it difficult to steal the lid, however, the drawback is that it is necessary to replace the lid complete with the frame during repair work of inspection wells.

The closest in technical essence to the proposed group of inventions is a utility model RU120664, published 09.27.2012. The cover has a locking and holding device, which is two elastic brackets located opposite each other, each with a protrusion in the form of a one-sided wedge made with the possibility of engagement under the frame flange. The protrusion of the bracket is centrally located in the axis of symmetry of the tides of the manhole cover, and the ends of the bracket are connected to the outer ends of the stiffening ribs of the manhole cover, while the stiffener located in the axis of symmetry of the tides of the manhole cover is shortened, so that between the outer end of the stiffener and the bracket there is the gap restricting the movement of the elastic bracket when installing the manhole cover in the frame.

To improve the interface between the cover and the frame body, a rubber gasket is used, which ensures uniform damping of external forces during operation. According to GOST 3634-89, an elastic gasket is made of rubber with a hardness of at least 40 units. along Shore and fixed in the groove of the hatch or frame with special clamps.

The disadvantage is the design complexity, due to the presence of at least two retaining devices in the form of spring brackets, as well as the increased force holding the cover in the hatch frame, creating inconvenience during mounting and dismounting of the cover.

The manhole cover with a retaining device according to patent RU120664 is preferably made of ductile iron, grade VCh40 or VCh50 to provide the necessary elastic properties of the bracket during operation.

These disadvantages are eliminated in the proposed group of inventions.

The problem to be solved by the group of inventions is the creation of a universal manhole cover according to GOST 3634-89 with a retaining or locking-holding device for the manhole cover, which ensures easy repair by installing a manhole in the manhole frame in place without dismantling and reliability cover retention during dynamic loads during operation.

The technical result is the improvement of ease of use, reducing the time of restoration repair of inspection wells.

Another technical result is to improve the mating surfaces of the cover and frame by means of a damping pad.

The task is achieved in that the manhole cover of the manhole with a holding device and stiffening ribs radially arranged on the inside of the manhole cover and two diametrically opposed tides under the frame saddles. The manhole cover may contain 6 or 8 stiffeners.

The cover has a holding device in the form of two protrusions. The protrusions are made in the form of a one-sided wedge, with the possibility of engagement under the frame flange, with one protrusion located on the free end of the elastic bracket, which runs parallel to the circumference of the cover near its edge, the other end of the bracket is fixed to the stiffener, and the second protrusion is located on the continuation of the existing stiffeners located along the axis of the tides under the saddle of the frame with the opposite elastic bracket side of the hatch and is a continuation of this rib.

The existing stiffener, located along the tidal axis under the saddle of the frame on the side of the elastic bracket, is shortened so that there is a gap between the outer end of the stiffener and the bracket that limits the course of the elastic bracket when installing the manhole cover in the frame.

A variant of the material that is preferably used in the manufacture of the manhole cover with a holding device is high-strength cast iron grade VCh40 or VCh50.

Significant differences of the device are:

one . The location of the two wedge-shaped protrusions along the axis of symmetry of the tides of the manhole cover, while the execution of one protrusion is movable on an elastic bracket, and the second is stationary.

2. The use of stiffeners as a stop for an elastic bracket by performing stiffeners located in the axis of symmetry of the tides of the manhole cover shortened, with a gap that limits the course of the elastic bracket when installing the manhole cover in the frame.

Due to signs 1 and 2, an improvement in the convenience of operation is ensured, due to the fact that, when opening and closing the manhole cover, the force from the tool can be applied from either side of the cover in places of tides, because both protrusions are wedge-shaped. The presence of one elastic bracket simplifies the design. The ability to install a cover in any frame made in accordance with GOST 3634-89, reduces the time for restoration repair of inspection wells by eliminating the operation of replacing the frame itself.

The emphasis on the elastic bracket allows you to limit its movement under shock loads and to exclude spontaneous loss of the cover from the frame during operation.

Improved usability is also achieved due to the lower weight of the lid made of ductile iron compared with traditional lids made of cast iron.

The combined use of distinctive features allows to achieve the claimed technical result.

GOST 3634-89 provides for the presence of a shock-absorbing pad for installation in a groove on the hatch or frame cover.

 To reduce damping loads and improve the mating of the surfaces of the lid and frame, the claimed invention uses a damping gasket for the manhole cover of the manhole with a holding device made in the form of a rubber ring cuff of a l-shaped cross section with the possibility of installing a manhole frame on the surface of a horizontal annular platform. Such a gasket has a large contact area, is securely fixed to the frame and can be installed on the frame without a special groove for the gasket.

Significant differences of the device are:

1. Laying in the form of a rubber ring cuff of a l-shaped cross section with the possibility of installing on the surface of the horizontal annular area of the frame of the inspection well.

With this installation, no additional locking elements are required. Installation is possible on the manhole frame of a manhole of any design. Due to the characteristic 1, the necessary mating of the surfaces of the cover and frame is provided, because the cover and frame could be made at different times and from different materials, for example cast iron and high-strength cast iron, a damping pad is required.

The use of a distinctive feature allows to achieve the claimed technical result.

The proposed group of inventions is illustrated by drawings on the example of a manhole cover:

FIG. 1 — manhole cover.

FIG. 2 - manhole cover of a manhole, in a frame with a gasket.

The figure 1 shows the hatch cover 1 of the manhole with a holding device containing an elastic bracket 2, wedge-shaped protrusions 3, stiffeners 4, tides 5.

The figure 2 shows a sectional view of the hatch cover 1 on the frame 6 with a damping pad 7 assembly.

The device operates as follows:

The device closes after placing the cover 1 of the hatch in the frame 6. In this case, the wedge-shaped protrusions 3 located on opposite ends of the cover in the axis of symmetry of the tides 5 of the cover engage under the inner ring flange of the frame, reliably locking the cover in the frame. As a result, the lid is locked in two places.

The device is opened using a tool, such as scrap (not shown in Fig.), Interacting with any tide 5 of the cover (Fig. 1) and frame 6 (Fig. 2), which serves as a stop. The elastic bracket as a result of applying force to the tide of the cover is wrung out and one of the wedge-shaped protrusions 3 of the bracket 2 is disengaged from the frame 6.

The gasket 7 located on the manhole cover reduces damping loads and improves the mating of the surfaces of the cover and frame. The gasket design allows to ensure its retention on the hatch frame of a manhole of any design during operation. If necessary, the gasket can be easily replaced with a new one.

Claims (3)

1. The manhole cover of the manhole with a holding device, stiffening ribs radially located on the inside of the manhole cover and two diametrically opposite tides under the frame seats, characterized in that the manhole cover has a holding device made in the form of two protrusions in the form of a one-sided wedge made with the possibility of engagement under the flange of the frame, while one protrusion is located on the free end of the elastic bracket, which runs parallel to the circumference of the cover near its edge, and the other end of the bracket for mounted on the stiffener, and the second protrusion is located on the continuation of the existing stiffener, located along the tidal axis under the saddle of the frame opposite the elastic bracket of the side of the manhole cover, and is a continuation of this rib, while the existing stiffener located on the tidal axis under the saddle of the frame with side of the elastic bracket, is made shortened, so that between the outer end of the stiffener and the bracket there is a gap restricting the course of the elastic bracket when installing the manhole cover in the frame. 2. The manhole cover of the manhole with a holding device according to claim 1, characterized in that the device is made of ductile iron of the VCh40 or VCh50 brand. 3. The damping gasket of the manhole cover of the manhole with a holding device, characterized in that the gasket is made in the form of a rubber ring cuff of a g-shaped cross-section with the possibility of installing on the surface of the horizontal annular platform of the frame of the manhole.

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