A quick-cut blind valve

Abstract

This application relates to the field of valves, and in particular to a quick-change blind plate valve, which includes a left valve body and a right valve body. A working seam is provided at the connection between the left valve body and the right valve body. A switching plate is inserted into the working seam. The surface of the switching plate is provided with flow channel holes and a cut-off area. A clamping seat is provided at the position of the right valve body close to the switching plate. Annular grooves are formed at the edges of the cut-off area on the opposite two surfaces of the switching plate, and annular gaskets are arranged in the annular grooves. A cavity is formed inside the switching plate, and an extrusion assembly for pressing against the annular gasket is installed in the cavity. Linkage holes communicating with the cavity are formed on both surfaces of the switching plate outside the annular grooves. Linkage bars are arranged in the linkage holes, one end of each linkage bar is connected to the extrusion assembly, and the other end passes through the hole opening. When the cut-off area of the switching plate is clamped between the clamping seat and the left valve body, the linkage bars synchronously drive the extrusion assembly to press the annular gasket, which has the advantage of improving the sealing performance at the butt joint position between the switching plate and the clamping device.

Description

Technical Field

[0001] The present application relates to the field of valves, and in particular to a quick-cut blind plate valve. Background Art

[0002] The pipeline quick-cut blind plate valve is a new type of valve product designed and developed for the safe, fast and convenient replacement of pipeline blind plates in pipeline interception, isolation and maintenance processes, and for the problems of lower operating efficiency, large size and heavy weight of ordinary blind plate valves. It can be used in the feed pipelines of devices in the petroleum, chemical industry, steel and other industries, the feed pipelines of transfer warehouses / pump stations, the feed pipelines of reactors, the gas pipelines of metallurgical blast furnace systems, torch systems, etc. It is a reliable cutting device that plays an important role in equipment maintenance, pipeline switching, medium isolation, preventing medium leakage, protecting personnel safety and reducing environmental pollution. It can also be used in various complex industrial and mining conditions such as water, gas (steam, air, natural gas, etc.), petroleum refining, oil products, metallurgical slag, slurry, granular media, dust media and multiphase flow. The pipeline quick-cut blind plate valve can well solve the problems of large safety hazards, low efficiency, high labor intensity of workers, large size and low operating efficiency of ordinary blind plate valves when replacing pipeline blind plates.

[0003] In the related technology, such as the utility model patent with authorization announcement number CN217328742U applied by the applicant on December 27, 2021, a pipeline quick-cut blind plate valve is disclosed, which includes: a valve body, the valve body is provided with a working seam, a switching plate is provided in the working seam, the switching plate is provided with a clamping device, the clamping device includes a clamping seat and a clamping plate, the clamping seat and the clamping plate are movably connected, the clamping plate is provided with a clamping drive mechanism, and the clamping plate is telescopic relative to the clamping seat; and a flow channel hole position and a non-flow channel hole position are provided on the switching plate, and the non-flow channel hole position is used to cut off the flow of the medium in the valve body.

[0004] However, it can be seen from the above technical solution that when the quick-cut blind plate valve uses a non-flow channel position to seal and intercept the pipeline, the sealing is mainly achieved by the clamping force of the clamping device. However, the joint between the switching plate and the valve body will be worn after long-term use. Although the left valve body is isolated from the right valve body, the medium in the valve body will still leak to the external environment, resulting in a poor sealing effect. Summary of the invention

[0005] In order to improve the sealing performance at the docking position between the switching plate and the clamping device, the present application provides a quick-cut blind plate valve.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A quick-cut blind plate valve comprises a left valve body and a right valve body, wherein a working seam is arranged at the connection between the left valve body and the right valve body, a switching plate is inserted in the working seam, a flow channel hole for connecting the left valve body and the right valve body and a flow interception area for cutting off the left valve body and the right valve body are arranged on the surface of the switching plate, a clamping seat is arranged at a position of the right valve body close to the switching plate, annular grooves are arranged on the opposite two side surfaces of the switching plate at the edge of the flow interception area, an annular sealing gasket is arranged in the annular groove, a cavity is arranged inside the switching plate, an extrusion assembly for pressing the annular sealing gasket is installed in the cavity, linkage holes communicating with the cavity are arranged on the outer sides of the annular grooves on the two side surfaces of the switching plate, a linkage strip having one end connected to the extrusion assembly and the other end passing through the orifice is arranged in the linkage hole, and when the flow interception area of ​​the switching plate is clamped between the clamping seat and the left valve body, the linkage strip synchronously drives the extrusion assembly to extrude the annular sealing gasket.

[0008] Optionally, the extrusion assembly includes an extrusion plate and a clamping column. There are multiple extrusion columns, and the multiple extrusion columns are distributed in a circular array along the annular groove. One end of the extrusion column is fixedly connected to the extrusion plate, and the other end passes through the switching plate and extends into the annular groove and abuts against the annular sealing gasket.

[0009] Optionally, two groups of extrusion plates are provided, and the two groups of extrusion plates are parallel to each other. The extrusion columns corresponding to each group of extrusion plates are installed on the side surfaces of the extrusion plates that are opposite to each other. Two groups of linkage holes are also provided, and the two groups of linkage holes are respectively arranged on the side surface of the switching plate facing the clamping seat and the side surface facing the left valve body.

[0010] Optionally, the two groups of linkage holes are arranged on both sides of the interception area of ​​the switching plate in the horizontal direction.

[0011] Optionally, each side surface of the switching plate is provided with at least two groups of concentric annular grooves, and the surface of the extrusion plate corresponding to the annular grooves is provided with two groups of a plurality of corresponding abutment columns distributed in an annular array.

[0012] Optionally, a first sealing ring groove is formed in an area of ​​the left valve body surface facing the annular groove, and a second sealing ring groove is formed in an area of ​​the clamping seat facing the annular groove.

[0013] Optionally, an annular extrusion strip is fixedly disposed in the first sealing ring groove and is used to butt with the end of the corresponding annular sealing gasket.

[0014] Optionally, the annular extrusion strip is arranged at the center of the first sealing ring groove, and the end of the annular extrusion strip is in an arc shape.

[0015] Optionally, a connecting block is fixed to opposite side edges of the two groups of extrusion plates respectively, and the end of the linkage bar is fixedly connected to the connecting block.

[0016] Optionally, a plurality of reset springs are fixedly arranged between the extrusion plate and the inner wall of the cavity. When the reset springs are in the original length state, the end of the linkage bar extends beyond the surface of the switching plate.

[0017] By adopting the above technical solution, when it is necessary for the switching plate to perfectly cut off the left valve body and the right valve body, the cut-off area of the switching plate is aligned with the communication position between the left valve body and the right valve body, and the switching plate is clamped between the left valve body and the clamping seat by using the clamping seat. During the process of clamping the switching plate, the edge position of the valve hole of the left valve body and the clamping seat will both apply pressure to the linkage bar. The linkage bar drives the extrusion plate to move, and the extrusion plate moves through the abutting column, thereby driving the annular rubber pad to move out of the annular groove and finally being extruded into the first sealing ring groove and the second sealing ring groove, so that the sealing effect of the cut-off area of the switching plate is greatly improved.

[0018] In summary, the present application has the following technical effects:

[0019] By arranging an annular groove and an annular sealing pad at the edge of the cut-off area of the switching plate, and arranging an extrusion assembly inside the switching plate, when the cut-off area of the switching plate works, the medium in the valve body will not escape or overflow from the surface of the switching plate, improving the sealing performance at the switching plate;

[0020] By arranging a linkage bar at the edge of the cut-off area of the switching plate, when the switching plate is pressed, the linkage bar can drive the extrusion assembly to push the annular sealing pad into the first sealing ring groove and the second sealing ring groove, further improving the sealing effect of the cut-off area of the switching plate;

[0021] By arranging an annular extrusion strip in the first sealing ring groove, when the annular sealing pad enters the first sealing ring groove, the end of the annular sealing pad is extruded by the annular extrusion strip, so that the annular sealing pad deforms and fills the first sealing ring groove, further improving the sealing effect. Description of the Drawings

[0022] Figure 1 is the overall structural schematic diagram of the quick-cut blind plate valve in the embodiment of the present application;

[0023] Figure 2 is the structural schematic diagram of the switching plate in the embodiment of the present application;

[0024] Figure 3 is the cross-sectional view of the quick-cut blind plate valve in the embodiment of the present application;

[0025] Figure 4 is Figure 3 the partial enlarged schematic diagram at A in

[0026] Figure 5 is the structural schematic diagram of the extrusion assembly in the embodiment of the present application;

[0027] Figure 6 It is another structural schematic diagram of the switching board in the embodiment of the present application.

[0028] In the figure, 1, left valve body; 11, first sealing ring groove; 111, annular extrusion strip; 2, right valve body; 3, switching plate; 31, flow channel hole; 32, interception area; 33, annular groove; 331, annular sealing gasket; 34, cavity; 35, linkage hole; 4, clamping seat; 41, clamping drive mechanism; 42, second sealing ring groove; 5, extrusion assembly; 51, extrusion plate; 511, connecting block; 512, return spring; 52, clamping column; 6, linkage strip. Implementation

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figure 1 , the present application provides a quick-cut blind plate valve, including a left valve body 1, a right valve body 2, a switching plate 3, a clamping seat 4 and a clamping drive mechanism 41. There is a working gap between the left valve body 1 and the right valve body 2. The switching plate 3 is arranged inside the working gap for switching the opening or closing of the left valve body 1. The clamping seat 4 is arranged on the side of the working gap close to the right valve body 2, and the clamping drive mechanism 41 is arranged on the side of the clamping seat 4 away from the left valve body 1. The clamping drive mechanism 41 utilizes a threaded transmission method to drive the clamping seat 4 to move horizontally, thereby realizing the clamping and sealing of the switching plate 3. This is the prior art, which is described in the patent document with the authorization announcement number CN217328742U and the name of a pipeline quick-cut blind plate valve applied by the applicant on December 27, 2021, and will not be repeated here.

[0031] like Figure 2 As shown, the surface of the quick-cut plate is divided into two areas, namely a connecting area and a cut-off area 32. The connecting area is provided with a through flow channel hole 31, and the cut-off area 32 is a closed structure. When in use, the switching plate 3 can move horizontally in the working seam. When the flow channel hole 31 is located between the left valve body 1 and the right valve body 2, the medium in the left valve body 1 and the right valve body 2 can flow smoothly. When the cut-off area 32 is located between the left valve body 1 and the right valve body 2, the valve body is in a closed cut-off state.

[0032] Combination Figure 3 and Figure 4 , annular annular grooves 33 are provided on both side surfaces of the switching plate 3, and the annular grooves 33 are arranged at the edge of the interception area 32. Specifically, at least two groups of concentric annular grooves 33 are provided on each side surface of the switching plate 3. The cross section of the annular grooves 33 is a common rectangular or trapezoidal structure. In this embodiment, the trapezoidal grooves are preferably provided, and the opening size gradually decreases from the inside to the outside. An annular sealing gasket 331 is arranged in the annular groove 33.

[0033] The inside of the switching plate 3 is provided with a cavity 34, and an extrusion assembly 5 is arranged inside the cavity 34. The extrusion assembly 5 includes an extrusion plate 51 and a pressing column 52. In this embodiment, there are two sets of extrusion plates 51, and the two sets of extrusion plates 51 are parallel to each other. The pressing columns 52 are arranged on the surfaces of the two sets of extrusion plates 51 facing away from each other. Combining with Figure 5 it can be known that multiple groups of pressing columns 52 are arranged on the surface of each set of extrusion plates 51, and the number of groups of pressing columns 52 depends on the number of annular grooves 33 opened, that is, it is ensured that the number of groups of pressing columns 52 is equal to the number of annular grooves 33 opened. The multiple pressing columns 52 in each group are also arranged in a circumferential array concentric and of the same diameter as the annular groove 33.

[0034] One end of the pressing column 52 is fixedly connected to the corresponding extrusion plate 51, and the other end passes through the surface of the switching plate 3 and extends into the corresponding annular groove 33. The end of the pressing column 52 penetrating into the annular groove 33 is directly adhesively fixed to the annular sealing groove.

[0035] A plurality of return springs 512 are fixedly arranged on the surface of the extrusion plate 51 facing the inner wall of the cavity 34. One end of the return spring 512 is fixed to the extrusion plate 51, and the other end is fixed to the inner wall of the cavity 34. When the return spring 512 is in its original length state, the pressing column 52 drives the annular sealing gasket 331 to be completely embedded in the annular groove 33.

[0036] Furthermore, combining Figure 4 and Figure 5 , a connecting block 511 is fixed to each of the opposite sides of the two extrusion plates 51 in the horizontal direction. More specifically, for the connecting block 511 connected to the side of the extrusion plate 51 close to the left valve body 1, a linkage bar 6 is fixedly arranged on the surface thereof facing the right valve body 2; and for the connecting block 511 connected to the side of the extrusion plate 51 close to the right valve body 2, a linkage bar 6 is fixedly arranged on the surface thereof facing the left valve body 1, that is, the orientations of the two linkage bars 6 are completely opposite. Linkage holes 35 are opened at positions on the inner wall of the cavity 34 opposite to the linkage bars 6. The ends of the linkage bars 6 all pass through the linkage holes 35. Combining with the elastic force of the return spring 512, in the initial state, the end of the annular sealing gasket 331 is located inside the annular groove 33, while the end of the linkage bar 6 extends beyond the corresponding linkage hole 35. In this case, when the clamping drive mechanism 41 drives the clamping seat 4 to squeeze the switching plate 3, pressure is applied to the linkage bar 6 on the end face of the corresponding left valve body 1 and the end face of the clamping seat 4. Then the linkage bar 6 drives the entire extrusion plate 51 to move. The extrusion plate 51 then pushes the annular sealing gasket 331 out of the annular groove 33 through multiple pressing columns 52, and finally it is squeezed on the surface of the switching plate 3 in the throttling area 32 and undergoes elastic deformation, thereby improving the sealing performance of the switching plate 3 in the throttling area 32.

[0037] In order to further improve the sealing performance of the cut-off area 32 and ensure that the elastic deformation of the annular gasket 331 will not fail due to excessive extrusion deformation, a first sealing groove is provided in the area of the end face of the left valve body 1 facing the annular groove 33, and a second sealing groove is provided in the area of the end face of the clamping seat 4 facing the annular groove 33. Both the first sealing groove and the second sealing groove are of an annular groove structure. When the cut-off area 32 of the switching plate 3 is clamped between the left valve body 1 and the right valve body 2, the linkage bar 6 is pressed into the linkage hole 35, and then the extrusion plate 51 and the abutting column 52 are used to drive the annular gasket 331 to extend out of the annular groove 33 and finally enter the corresponding first sealing groove and the second sealing groove, achieving a further sealing effect.

[0038] In a more preferred embodiment of this example, an annular extrusion bar 111 is fixedly arranged at the bottom of the first sealing groove. The end of the annular extrusion bar 111 is arc-shaped. When the annular gasket 331 is pushed into the first sealing groove, the end of the annular gasket 331 contacts the annular extrusion bar 111, and thus undergoes elastic deformation under the extrusion of the annular extrusion bar 111, so that the annular gasket 331 can be closer to the inner wall of the first sealing groove, further improving the sealing effect.

[0039] As Figure 6 shown, in a more preferred embodiment, the switching plate 3 can be divided into two parts, which are joined together along the thickness direction of itself to ensure the convenience of installing the internal structure of the switching plate 3 during the production and manufacturing process, and the joint seam is sealed and fixed by welding.

[0040] In summary, the present application has at least the following advantages: By providing the extrusion assembly 5 and the linkage bar 6, when the cut-off area 32 of the switching plate 3 is clamped, the linkage bar 6 is synchronously pressed into the linkage hole 35, and then the extrusion assembly 5 is used to drive the annular gasket 331 to be extruded into the first sealing ring groove 11 and the second sealing ring groove 42, so that the edges of the cut-off area 32 can be strengthened in sealing, improving the cut-off sealing effect.

[0041] This specific embodiment is only an explanation of the present application, and it does not limit the present application. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A quick-cut blind plate valve, comprising a left valve body (1) and a right valve body (2). A working seam is provided at the connection between the left valve body (1) and the right valve body (2). A switching plate (3) is inserted into the working seam. A flow passage hole (31) for connecting the left valve body (1) and the right valve body (2) and a cut-off area (32) for cutting off the left valve body (1) and the right valve body (2) are provided on the surface of the switching plate (3). A clamping seat (4) is provided at a position on the right valve body (2) close to the switching plate (3), characterized in that: The switching plate (3) has an annular groove (33) formed on the opposite sides of the switching plate (3) at the edge of the intercepting area (32), and an annular sealing gasket (331) is arranged in the annular groove (33). A cavity (34) is formed inside the switching plate (3), and an extrusion assembly (5) for pressing against the annular sealing gasket (331) is installed in the cavity (34). Linkage holes (35) communicating with the cavity (34) are formed on the outer sides of the annular groove (33) on the surfaces of the switching plate (3) on both sides, and a linkage bar (6) is arranged in the linkage hole (35), one end of which is connected to the extrusion assembly (5) and the other end of which passes through the hole. When the intercepting area (32) of the switching plate (3) is clamped between the clamping seat (4) and the left valve body (1), the linkage bar (6) synchronously drives the extrusion assembly (5) to extrude the annular sealing gasket (331). The extrusion assembly (5) comprises an extrusion plate (51), a pressing column (52), A plurality of the abutting columns (52) are provided, and the plurality of abutting columns (52) are distributed in a circular array along the annular groove (33); one end of the abutting column (52) is fixedly connected to the extrusion plate (51), and the other end passes through the switching plate (3) and then extends into the annular groove (33) and abuts against the annular sealing gasket (331); two groups of extrusion plates (51) are provided, and the two groups of extrusion plates (51) are parallel to each other. The abutting columns (52) corresponding to each group of extrusion plates (51) are installed on the side surfaces of the extrusion plates (51) that are away from each other. Two groups of linkage holes (35) are also provided, and the two groups of linkage holes (35) are respectively provided on the side surface of the switching plate (3) facing the clamping seat (4) and the side surface facing the left valve body (1); a connecting block (511) is fixed to the opposite side edges of the two groups of extrusion plates (51), and the end of the linkage bar (6) is fixedly connected to the connecting block (511).

2. The quick-cut blind plate valve according to claim 1, wherein: The two groups of linkage holes (35) are arranged horizontally on both sides of the interception area (32) of the switching plate (3).

3. The quick-opening blind flange valve according to claim 2, characterized in that: Each side surface of the switching plate (3) is provided with at least two groups of concentric annular grooves (33), and the surface of the extrusion plate (51) corresponding to the annular groove (33) is provided with two groups of a plurality of corresponding abutment columns (52) distributed in an annular array.

4. A quick-cut blind valve according to claim 1, characterized in that: A first sealing ring groove (11) is formed in an area of ​​the surface of the left valve body (1) facing the annular groove (33), and a second sealing ring groove (42) is formed in an area of ​​the clamping seat (4) facing the annular groove (33).

5. The quick-cut blind plate valve according to claim 4, characterized in that: An annular extrusion strip (111) is fixedly arranged in the first sealing ring groove (11) and is used for butting against the end of the corresponding annular sealing gasket (331).

6. The quick-opening blind flange valve according to claim 5, wherein: The annular extrusion strip (111) is arranged at the center of the first sealing ring groove (11), and the end of the annular extrusion strip (111) is in an arc shape.

7. The quick-cut blind plate valve according to claim 2, characterized in that: A plurality of groups of return springs (512) are fixedly arranged between the extrusion plate (51) and the inner wall of the cavity (34), and when the return springs (512) are in an original length state, the end of the linkage bar (6) exceeds the surface of the switching plate (3).

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