Plug valve structure

Abstract

The utility model relates to the technical field of plug valves, in particular to a plug valve structure. The plug valve structure comprises a valve body, a flow channel transversely penetrating through the valve body is formed in the valve body, a plug cavity is formed in the middle of the flow channel, and a plug rubber bushing and a plug body are installed in the plug cavity. The cock rubber bushing is fixedly embedded in the cock cavity, and the upper side and the lower side of the cock rubber bushing are provided with elastic wrinkled air bag rings which are communicated with each other. According to the plug valve structure provided by the utility model, the two elastic wrinkled air bag rings are respectively extruded by the two pressing discs to be compressed, and after the elastic wrinkled air bag rings are compressed, air in the elastic wrinkled air bag rings flows into the plug rubber bushing to enable the plug rubber bushing to be expanded, so that the sealing effect between the expanded plug rubber bushing and the plug body is improved; in this way, when the plug body is opened and closed, self-sealing is formed between the plug body and the plug rubber bushing, the sealing effect is enhanced, the leakage problem is solved, and therefore the service life of the plug valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a plug valve structure. Background Art

[0002] A plug valve is a rotary valve in the shape of a closing piece or a plunger. It is a valve that can be opened or closed by rotating 90 degrees to connect or separate the channel opening on the valve plug with the channel opening on the valve body. The shape of the valve plug can be cylindrical or conical, corresponding to the rectangular or trapezoidal channel respectively. This design makes the structure of the plug valve light. The plug valve is mainly suitable for cutting off and connecting media and diverting. Sometimes, depending on the nature of the medium and the erosion resistance of the sealing surface, it can also be used for throttling.

[0003] In the existing plug valve, when the valve core flow channel rotates to be aligned with the valve body flow channel, the plug valve opens, and when the valve core flow channel rotates to be perpendicular to the valve body flow channel, the plug valve closes. At this time, sealing is achieved through the pressure at the inlet end, which is prone to loose sealing and leakage, shortening the service life of the plug valve.

[0004] Therefore, it is necessary to provide a new plug valve structure to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a plug valve structure.

[0006] The plug valve structure provided by the utility model comprises a valve body, a flow channel is provided in the valve body and runs through the valve body transversely, a plug cavity is provided in the middle of the flow channel, a plug rubber bushing and a plug body are installed in the plug cavity;

[0007] The plug rubber bushing is fixedly embedded in the plug cavity, and a cavity is arranged inside the plug rubber bushing. The upper and lower sides of the plug rubber bushing are both installed with elastic pleated airbag rings that are interconnected;

[0008] A through cavity is provided on the plug body, and the plug body is installed in the plug cavity and inserted in the plug rubber bushing. A rotating rod is fixedly installed on the plug body, and the rotating rod is rotatably installed in the valve body. The rotating rods on both sides of the plug body are respectively provided with threaded sections with opposite thread directions, and each of the threaded sections is sleeved with a pressing disk for pressing the elastic pleated airbag ring.

[0009] Preferably, installation cavities are opened in the valve body on the upper and lower sides of the plug cavity, the two elastic pleated airbag rings are respectively located in the two installation cavities, and the two elastic pleated airbag rings are respectively connected to the air inlets at the upper and lower ends of the plug rubber bushing through conduits.

[0010] Preferably, a threaded through hole is provided in the middle of the pressing disk, and the pressing disk is threadedly connected to the threaded section provided on the rotating rod through the threaded through hole.

[0011] Preferably, sliding blocks are fixedly mounted on both side walls of the pressing disk, and the two sliding blocks are respectively inserted into limiting grooves provided on the side walls of the cock cavity and are slidably connected to the limiting grooves.

[0012] Preferably, the plug rubber bushing is provided with a transversely arranged through hole.

[0013] Preferably, the rotating rod extends out of the top of the valve body and is fixedly mounted with a rotating column.

[0014] Preferably, connecting flanges are fixedly mounted on both ends of the valve body.

[0015] Compared with the related art, the plug valve structure provided by the utility model has the following beneficial effects:

[0016] When the utility model closes the plug valve, the plug body is reversed to rotate it 90 degrees, so that the through cavity on the plug body is misaligned with the flow channel, and at the same time, the two pressing disks sleeved on the rotating rod slide toward each other along the two threaded sections respectively, so that the two elastic pleated air bag rings are squeezed and compressed by the two pressing disks respectively, and after the elastic pleated air bag ring is compressed, the gas inside the elastic pleated air bag ring flows into the plug rubber bushing to expand it, so that the expanded plug rubber bushing improves the sealing effect with the plug body, so that when the plug body is switched, a self-seal is formed between the plug body and the plug rubber bushing, the sealing effect is enhanced, the leakage problem is solved, and the service life of the plug valve is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a preferred embodiment of the plug valve structure provided by the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the valve body shown;

[0019] Figure 3 for Figure 1 The schematic diagram of the connection structure between the rubber bushing of the plug and the elastic pleated airbag ring is shown;

[0020] Figure 4 for Figure 1 The structural schematic diagram of the plug body shown;

[0021] Figure 5 for Figure 1 A schematic structural diagram of a pressing disc shown;

[0022] Figure 6 for Figure 5Schematic diagram of the installation structure of the pressing disk on the plug body.

[0023] Numbers in the figure: 1, valve body; 1a, flow channel; 1b, plug cavity; 1c, installation cavity; 1d, limit groove; 2, plug rubber bushing; 2a, through hole; 3, elastic pleated air bag ring; 4, plug body; 4a, through cavity; 41, rotating rod; 42, threaded section; 43, rotating column; 5, pressing disk; 51, sliding block; 6, connecting flange. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0026] See also Figures 1 to 6 The utility model provides a plug valve structure in an embodiment, and the plug valve structure includes: a valve body 1, a plug rubber bushing 2, an elastic pleated airbag ring 3 and a plug body 4.

[0027] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The valve body 1 is provided with a flow channel 1a which runs through the valve body 1 transversely, and a plug cavity 1b is provided in the middle of the flow channel 1a, and a plug rubber bushing 2 and a plug body 4 are installed in the plug cavity 1b. Specifically,

[0028] The plug rubber bushing 2 is provided with a transverse through hole 2a, the plug rubber bushing 2 is fixedly embedded in the plug cavity 1b, and a cavity is provided in the plug rubber bushing 2, and the upper and lower sides of the plug rubber bushing 2 are both installed with elastic pleated airbag rings 3 that are interconnected, and the valve body 1 on the upper and lower sides of the plug cavity 1b is provided with installation cavities 1c, the two elastic pleated airbag rings 3 are respectively located in the two installation cavities 1c, and the two elastic pleated airbag rings 3 are respectively interconnected with the air inlets at the upper and lower ends of the plug rubber bushing 2 through conduits;

[0029] The plug body 4 is provided with a through cavity 4a, and the plug body 4 is installed in the plug cavity 1b and inserted in the plug rubber bushing 2. A rotating rod 41 is fixedly installed on the plug body 4, and the rotating rod 41 is rotatably installed in the valve body 1, and the rotating rods 41 on both sides of the plug body 4 are respectively provided with threaded sections 42 with opposite thread directions, and each of the threaded sections 42 is sleeved with a pressing disk 5 for pressing the elastic pleated airbag ring 3, and a threaded through hole is provided in the middle of the pressing disk 5, and the The pressing disk 5 is threadedly connected to the threaded section 42 provided on the rotating rod 41 through a threaded through hole, and sliding blocks 51 are fixedly installed on both side walls of the pressing disk 5. The two sliding blocks 51 are respectively inserted into the limiting grooves 1d provided on the side walls of the plug cavity 1b and are slidably connected to the limiting grooves 1d. Since the pressing disk 5 is threadedly connected to the threaded section 42 and the pressing disk 5 is restricted on both sides by the sliding blocks 51, when the rotating rod 41 is rotated, the two pressing disks 5 can slide toward or away from each other along the two threaded sections 42.

[0030] It should be noted that: when the plug valve is opened, the plug body 4 is rotated so that the through cavity 4a opened on the plug body 4 is consistent with the flow channel 1a, so that the plug valve is opened. At this time, the two pressing plates 5 slide back to back along the two threaded sections 42, so that the two elastic pleated airbag rings 3 are not squeezed by the pressing plates 5;

[0031] When the plug valve needs to be closed, the plug body 4 is reversed to rotate the plug body 4 by 90 degrees, so that the through cavity 4a on the plug body 4 is misaligned with the flow channel 1a. At the same time, the two pressing plates 5 sleeved on the rotating rod 41 slide toward each other along the two threaded sections 42 respectively. Therefore, the two elastic pleated airbag rings 3 are squeezed and compressed by the two pressing plates 5 respectively. After the elastic pleated airbag rings 3 are compressed, the gas inside the elastic pleated airbag rings 3 flows into the plug rubber bushing 2 to expand it, so that the expanded plug rubber bushing 2 improves the sealing effect with the plug body 4. In this way, when the plug body 4 is opened and closed, a self-seal is formed between the plug body 4 and the plug rubber bushing 2, thereby enhancing the sealing effect, solving the leakage problem, and extending the service life of the plug valve.

[0032] The rotating rod 41 extends out of the top of the valve body 1 and is fixedly mounted with a rotating column 43, so that the staff can use a wrench to rotate the rotating rod 41 to open or close the plug body 4;

[0033] Wherein, connecting flanges 6 are fixedly installed at both ends of the valve body 1 to facilitate the connection between the valve body 1 and the pipeline.

[0034] The working principle of the plug valve structure provided by the utility model is as follows:

[0035] When the stopcock is opened, the stopcock body 4 is rotated so that the through cavity 4a opened on the stopcock body 4 is aligned with the flow channel 1a, thereby opening the stopcock. At this time, the two pressing plates 5 slide along the two threaded sections 42 in opposite directions, so that the two elastic pleated airbag rings 3 are not squeezed by the pressing plates 5. When the stopcock needs to be closed, the stopcock body 4 is reversed so that the stopcock body 4 is rotated 90°, so that the through cavity 4a on the stopcock body 4 is misaligned with the flow channel 1a. At the same time, the two pressing plates 5 sleeved on the rotating rod 41 slide along the two threaded sections 42 respectively. The threaded sections 42 slide toward each other, so that the two elastic pleated airbag rings 3 are squeezed and compressed by the two pressing plates 5 respectively, and the gas inside the elastic pleated airbag ring 3 after compression flows into the plug rubber bushing 2 to expand it, so that the expanded plug rubber bushing 2 improves the sealing effect with the plug body 4, so that when the plug body 4 is switched, a self-seal is formed between the plug body 4 and the plug rubber bushing 2, thereby enhancing the sealing effect, solving the leakage problem, and extending the service life of the plug valve.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plug valve structure, characterized in that: The valve body (1) comprises a flow channel (1a) which runs through the valve body (1) transversely, and a plug cavity (1b) is formed in the middle of the flow channel (1a), and a plug rubber bushing (2) and a plug body (4) are installed in the plug cavity (1b); The plug rubber bushing (2) is fixedly embedded in the plug cavity (1b), and a cavity is provided in the plug rubber bushing (2). The upper and lower sides of the plug rubber bushing (2) are both provided with interconnected elastic pleated airbag rings (3); The plug body (4) is provided with a through cavity (4a), and the plug body (4) is installed in the plug cavity (1b) and inserted in the plug rubber bushing (2). A rotating rod (41) is fixedly installed on the plug body (4), and the rotating rod (41) is rotatably installed in the valve body (1). The rotating rods (41) on both sides of the plug body (4) are respectively provided with threaded sections (42) with opposite thread directions, and each of the threaded sections (42) is sleeved with a pressing disk (5) for pressing the elastic pleated airbag ring (3).

2. The plug valve structure according to claim 1, characterized in that: The valve body (1) on the upper and lower sides of the plug cavity (1b) is provided with installation cavities (1c), the two elastic pleated airbag rings (3) are respectively located in the two installation cavities (1c), and the two elastic pleated airbag rings (3) are respectively connected to the air inlets at the upper and lower ends of the plug rubber bushing (2) through conduits.

3. The plug valve structure according to claim 1, characterized in that: A threaded through hole is provided in the middle of the pressing disc (5), and the pressing disc (5) is threadedly connected to a threaded section (42) provided on the rotating rod (41) through the threaded through hole.

4. The plug valve structure according to claim 3, characterized in that: Sliding blocks (51) are fixedly mounted on both side walls of the pressing plate (5), and the two sliding blocks (51) are respectively inserted into limiting grooves (1d) provided on the side walls of the cock cavity (1b) and are slidably connected to the limiting grooves (1d).

5. The plug valve structure according to claim 1, characterized in that: The plug rubber bushing (2) is provided with a transversely arranged through hole (2a).

6. The plug valve structure according to claim 1, characterized in that: The rotating rod (41) extends out of the top of the valve body (1) and is fixedly mounted with a rotating column (43).

7. The plug valve structure according to claim 1, characterized in that: Connecting flanges (6) are fixedly mounted on both ends of the valve body (1).

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