Gasket for fixing reversing valve plate bolt

Abstract

The utility model provides a gasket for fixing a valve plate bolt of a reversing valve, which relates to the field of bolt fixing and comprises a gasket body. The gasket body is provided with a plurality of open holes for lead-in parts of bolts to penetrate through. All the openings are distributed in a circumferential array; when the gasket body is placed on a flange, the open hole coincides with a screw hole of the flange. The edge of the gasket body is further provided with a plurality of extending parts extending towards the outer side of the gasket body. One extending part corresponds to one opening; and the extension parts can be folded towards the corresponding open holes. According to the utility model, the problem of bolt pre-tightening force loss caused by mechanical motion or temperature influence when an object is fixed through a flange and a bolt in the prior art can be solved, and the risk that the bolt is loosened and separated from the flange is reduced.

Description

Technical Field

[0001] The utility model relates to the field of bolt fixing, in particular to a gasket used for fixing the bolts of a valve plate of a reversing valve. Background Art

[0002] The reversing valve includes an air-smoke reversing valve and a coal smoke reversing valve. The air-smoke reversing valve can realize the reversal between air and smoke, and the coal smoke reversing valve can realize the reversal between gas and smoke.

[0003] For example, Chinese patent application No. 201210142544.2 discloses a dual-drive reversing valve for a regenerative combustion furnace, which has a valve plate therein for controlling the communication channel between the smoke chamber and the air chamber. One end of the valve plate is connected to the telescopic shaft of the hydraulic cylinder, and the other end is connected to the rotating shaft.

[0004] In the above patents, when fixing the valve plate and the telescopic shaft, two semicircular flanges are usually used to clamp the telescopic shaft, and the telescopic shaft is tightened and fixed to the valve plate by bolts.

[0005] However, when the valve plate and the telescopic shaft are fixed in the above manner, the telescopic shaft of the hydraulic cylinder on the air-smoke reversing valve is constantly moving and is affected by high temperature, and the pre-tightening force of the bolts will be lost, causing the bolts to loosen from the flange and cause the valve plate to fall off, thereby affecting the use of the air-smoke reversing valve and causing the system to alarm and stop production. Utility Model Content

[0006] In response to the above-mentioned problems, the utility model provides a gasket for fixing the bolts of the valve plate of a reversing valve, which can solve the problem of loss of bolt preload due to mechanical movement or temperature when fixing objects through flanges and bolts in the prior art, thereby reducing the risk of bolts loosening and detaching from the flange.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The utility model provides a gasket for fixing the bolts of a valve plate of a reversing valve, comprising a gasket body; the gasket body is provided with a plurality of openings for the guide parts of the bolts to pass through; all the openings are distributed in a circular array; when the gasket body is placed on a flange, the openings coincide with the screw holes of the flange; the edge of the gasket body is also provided with a plurality of extensions extending toward the outside of the gasket body; one extension corresponds to one opening; and the extension can be folded toward the corresponding opening.

[0009] The utility model provides a gasket for fixing the valve plate bolts of a reversing valve, preferably, the gasket body is in a partial ring shape; the direction toward the inner circle of the gasket body is used as the inner side of the gasket body; all the openings are distributed in a circular array along the outer circle of the gasket body; the extension portion is located on the outer circle of the gasket body.

[0010] The utility model provides a gasket for fixing the valve plate bolts of a reversing valve, preferably, a gap is provided on the extension portion; the gap extends from the outer side of the extension portion to the outer circle of the gasket body; the gap divides the extension portion into a first foldable portion and a second foldable portion.

[0011] The utility model provides a gasket for fixing the valve plate bolts of a reversing valve, preferably, the gap, the center of the opening and the center of the outer circle of the gasket body are all on the same straight line; the first foldable part and the second foldable part are symmetrically arranged according to the gap.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] The utility model provides a gasket for fixing the valve plate bolts of a reversing valve, comprising a gasket body, on which a plurality of openings are provided for the introduction parts of the bolts to pass through. When the introduction parts of the bolts enter the semicircular flanges from the openings and the bolts are tightened on the valve plate, the gasket body can reduce the friction between the heads of the bolts and the semicircular flanges, thereby reducing the wear of the bolts and the semicircular flanges, thereby extending the service life of the bolts and reducing the loss of the pre-tightening force of the bolts; the manner in which all the openings are distributed in a circular array can conform to the arrangement of the screw holes on the flange, thereby improving the usability of the gasket; in order to prevent the bolts from loosening or falling off from the flange, the edges of the gasket body are provided with a plurality of holes. The flange is also provided with a plurality of extensions extending toward the outside of the gasket body, one extension corresponds to an opening, the extension can be folded toward the opening, and the edge of the extension is folded to the head of the bolt. The extension has a certain strength and can provide a certain pressure for the bolt, thereby preventing the bolt from falling off directly from the flange in a loose state, thereby preventing the valve plate from falling from the telescopic shaft; and the folded extension blocks the gap between the bolt near the outside of the gasket body and the gasket body, reducing the impact of the environment on the connection between the bolt and the flange, thereby extending the service life of the bolt, reducing the loss of the bolt preload, and reducing the possibility of bolt loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, but the emphasis is on illustrating the subject matter of the present invention.

[0015] Figure 1 It is a structural schematic diagram of a gasket for fixing the valve plate bolts of a reversing valve provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0017] Embodiment 1:

[0018] like Figure 1 As shown, the gasket for fixing the bolts of the valve plate of a reversing valve provided by Example 1 of the utility model includes a gasket body 0; a plurality of openings 1 for the guide parts of the bolts to pass through are provided on the gasket body 0; all the openings 1 are distributed in a circular array; when the gasket body 0 is placed on the flange, the openings 1 coincide with the screw holes of the flange; the edge of the gasket body 0 is also provided with a plurality of extensions 2 extending toward the outside of the gasket body 0; one extension 2 corresponds to one opening 1; the extension 2 can be folded toward the opening 1.

[0019] When the gasket for fixing the valve plate bolt of the reversing valve provided in Example 1 of the utility model is used, at one end of the air-smoke reversing valve where the valve plate is fixed to the telescopic shaft, the two semicircular flanges can be spliced ​​into a complete flange, the telescopic shaft sleeve is arranged in the two semicircular flanges, and the contraction shaft is stably arranged in the two semicircular flanges by squeezing the two semicircular flanges; a gasket is placed on one side of the semicircular flange, and a valve plate is placed on the other side, so that the opening 1 of the gasket coincides with the screw hole on the semicircular flange, and multiple gaskets can be used simultaneously according to the number of screw holes on the semicircular flange; the introduction part of the bolt is extended into the semicircular flange from one side of the gasket, and further, the bolt is extended into the valve plate, and the bolt fixes the semicircular flange to the valve plate. At this time, the telescopic shaft is fixed to the valve plate; the extension part 2 is folded in the direction of the opening 1, so that the edge of the extension part 2 is folded to the head of the bolt, and the extension part 2 blocks the outer gap between the bolt and the gasket. The semicircular flange here can be the semicircular flange mentioned in Chinese Patent No. 201020518930.3.

[0020] The gasket for fixing the valve plate bolts of the reversing valve provided by Example 1 of the utility model comprises a gasket body 0, on which a plurality of openings 1 are provided for the introduction part of the bolts to pass through. When the introduction part of the bolt enters the semicircular flange from the opening 1 and the bolt is tightened on the valve plate, the gasket body 0 can reduce the friction between the head of the bolt and the semicircular flange, thereby reducing the wear of the bolt and the semicircular flange, thereby extending the service life of the bolt and reducing the loss of the bolt pre-tightening force; the way in which all the openings 1 are distributed in a circular array can match the arrangement of the screw holes on the flange, thereby improving the usability of the gasket; in order to prevent the bolts from loosening or falling off from the flange, the edges of the gasket body 0 are provided with a plurality of openings 1 for the introduction part of the bolts to pass through. The flange is also provided with a plurality of extensions 2 extending toward the outside of the gasket body 0, one extension 2 corresponds to one opening 1, the extension 2 can be folded toward the opening 1, and the edge of the extension 2 is folded to the head of the bolt. The extension 2 has a certain strength and can provide a certain pressure for the bolt, thereby preventing the bolt from falling off directly from the flange in a loose state, thereby preventing the valve plate from falling from the telescopic shaft; and the folded extension 2 blocks the gap between the bolt near the outside of the gasket body 0 and the gasket body 0, reducing the impact of the environment on the connection between the bolt and the flange, thereby extending the service life of the bolt, reducing the loss of the bolt preload, and reducing the possibility of the bolt loosening.

[0021] The gasket for fixing the valve plate bolts of the reversing valve provided in Example 1 of the utility model is preferably designed as a partial ring shape in order to further improve the adaptability of the gasket on the flange, with the direction of the inner circle of the gasket body 0 as the inner side of the gasket body 0, and all the openings 1 are distributed in a circular array along the outer circle of the gasket body 0. The partial ring-shaped gasket is more suitable for flange use, and a plurality of gaskets can be spliced ​​to form a complete ring shape, thereby avoiding space conflicts caused by the use of multiple gaskets; at the same time, the extension portion 2 is located on the outer circle of the gasket body 0, which can avoid the extension portion 2 blocking the central opening of the flange during the use of the gasket, thereby improving the usability of the gasket.

[0022] The gasket for fixing the valve plate bolts of the reversing valve provided in Example 1 of the utility model is preferably provided with a gap 3 on the extension part 2 so that the extension part 2 can press the loose bolts more stably. The gap 3 extends from the outer side of the extension part 2 to the outer circle of the gasket body 0, and the gap 3 divides the extension part 2 into a first foldable part 21 and a second foldable part 22; when the first foldable part 21 and the second foldable part 22 are folded to the top of the bolt respectively, the first foldable part 21 and the second foldable part 22 can provide a clamping force to the bolt from two directions. Compared with the extension part 2 being directly folded to the top of the bolt, the first foldable part 21 and the second foldable part 22 disperse the pressure provided to the bolt, but expand the force application area to the bolt, so that the loose bolt is not easy to fall off from the flange.

[0023] The gasket for fixing the bolts of the valve plate of the reversing valve provided in Example 1 of the utility model is preferably such that the center of the gap 3, the center of the opening 1 and the center of the outer circle of the gasket body 0 are all on the same straight line, and the first foldable portion 21 and the second foldable portion 22 are symmetrically arranged according to the gap 3, so that the first foldable portion 21 and the second foldable portion 22 divided by the gap 3 are opposite to the opening 1. At this time, the extension portion 2 is closest to the opening 1, and the first foldable portion 21 and the second foldable portion 22 are at the same distance from the opening 1. The pressure provided by the first foldable portion 21 and the second foldable portion 22 to the bolt can reach the maximum, thereby reducing the possibility of the bolt falling off from the flange.

[0024] To sum up, the gasket for fixing the valve plate bolts of the reversing valve provided by the utility model can solve the problem of loss of bolt preload due to mechanical movement or temperature influence when fixing objects by flanges and bolts in the prior art, thereby reducing the risk of bolts loosening and detaching from the flange.

[0025] Those skilled in the art should understand that those skilled in the art can implement the above-mentioned variations by combining the prior art and the above-mentioned embodiments, which will not be described in detail here. Such variations do not affect the essential content of the present utility model, and will not be described in detail here.

[0026] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the utility model, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A gasket for fixing a valve plate bolt of a reversing valve, characterized in that: It comprises a gasket body; the gasket body is provided with a plurality of openings for the introduction parts of the bolts to pass through; all the openings are distributed in a circular array; when the gasket body is placed on the flange, the openings coincide with the screw holes of the flange; the edge of the gasket body is also provided with a plurality of extensions extending toward the outside of the gasket body; one extension corresponds to one opening; and the extension can be folded toward the corresponding opening.

2. The gasket for fixing the valve plate bolt of the reversing valve according to claim 1, characterized in that: The gasket body is partially annular; the direction toward the inner circle of the gasket body is taken as the inner side of the gasket body; all the openings are distributed in a circular array along the outer circle of the gasket body; and the extension portion is located on the outer circle of the gasket body.

3. The gasket for fixing the valve plate bolt of the reversing valve according to claim 2, characterized in that: The extending portion is provided with a slit; the slit extends from the outer side of the extending portion to the outer circumference of the gasket body; the slit divides the extending portion into a first foldable portion and a second foldable portion.

4. The gasket for fixing the valve plate bolt of the reversing valve according to claim 3, characterized in that: The gap, the center of the opening and the center of the outer circle of the gasket body are all on the same straight line; the first foldable part and the second foldable part are symmetrically arranged according to the gap.

Images