Bidirectional sealing control plug valve

Abstract

The utility model discloses a bi-directional sealing control plug valve which comprises a valve body pipeline, a valve core, a valve rod and a valve cover, the valve core is installed in the valve body pipeline, a base plate is installed on the valve body pipeline, a flange is arranged on the outer side wall of the valve body pipeline, the flange is connected with the valve cover through a plurality of U-shaped plates, and the U-shaped plates are connected with the valve rod. The multiple U-shaped plates are connected with the flange and the valve cover through inserting rod assemblies, a screwing rod which is arranged on the valve rod in a sleeving mode and rotates synchronously with the valve rod is rotationally connected to the valve cover in a penetrating mode, an annular groove is formed in the upper end of the valve body pipeline, an annular column is fixedly connected to the bottom of the base plate, and the annular column extends into the annular groove. The valve has the advantages that the rotating disc is rotated to enable the screwing rod to rotate, the valve rod can rotate along with the screwing rod, the valve element is driven to rotate, the channel opening in the valve element is communicated with or separated from the channel opening in the valve body pipeline, and the opening or closing action is achieved.

Description

Technical Field

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

[0002] Plug valves are widely used in oilfield mining, transportation and refining equipment, and are widely used in petrochemical, chemical, coal gas, natural gas, liquefied petroleum gas, HVAC industry and general industry; their main functions are to cut off, connect and divert the medium. The existing plug valve includes a valve body, a valve core, a valve seat and a valve stem. The valve stem is connected to the valve core, and the valve seat is located in the channel in the valve body. The valve core and the valve seat of the plug cooperate to form a sealing pair. By rotating the valve stem, the valve core is driven to rotate together, so that the channel port on the valve core is connected or separated with the channel port on the valve body, and the opening or closing action is realized.

[0003] For example, the application document with the publication number: CN110131471B and the application name: Bidirectional sealed control plug valve, includes a valve body, which is provided with a valve body through hole, the valve body through hole includes a fine hole, a frustum hole and an expansion hole from top to bottom, the inner wall of the frustum hole of the valve body is a sealing surface, and the first flow port and the second flow port are symmetrically provided on both sides of the valve body, the first flow port and the second flow port are both connected to the frustum hole; a valve core, the valve core is arranged in the valve body through hole... This application document is the prior art relative to the present application, but in this application document, its structure makes it difficult to remove and replace the valve core, and then when the valve core is damaged, it is not convenient to remove the valve core for inspection, maintenance or replacement. For this reason, we designed a bidirectional sealed control plug valve to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a bidirectional sealing control cock valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A two-way sealed control plug valve comprises a valve body pipe, a valve core, a valve stem and a valve cover, the valve core is installed in the valve body pipe, a gasket is installed on the valve body pipe, the outer wall of the valve body pipe is provided with a flange, the flange and the valve cover are connected by a plurality of U-shaped plates, the plurality of U-shaped plates are connected to the flange and the valve cover by a plug rod assembly, a screw rod is rotatably connected through the valve cover and is sleeved on the valve stem and rotates synchronously with the valve stem, an annular groove is provided at the upper end of the valve body pipe, an annular column is fixedly connected to the bottom of the gasket, the annular column extends into the annular groove, the outer wall of the annular column is wrapped with a rubber sealing layer, and an annular sealing gasket is fixedly connected to the bottom of the gasket which is tightly pressed against the upper end of the valve body pipe.

[0007] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: the U-shaped plate is clamped on the flange and the valve cover, the inner side walls of the upper and lower ends of the U-shaped plate are respectively abutted against the upper end of the valve cover and the bottom of the flange, the U-shaped plate, the valve cover and the flange are all provided with through openings located on the same straight line, the upper end of the U-shaped plate is provided with a support opening, the plug rod assembly includes vertical rods that are slidably inserted into multiple through openings, the upper ends of the vertical rods are fixedly connected to support blocks, and the support blocks are abutted against the inner bottom of the support opening.

[0008] In order to better achieve the above purpose, the utility model adopts a further technical solution: a first annular magnetic block is embedded in the inner bottom of the support port, and a second annular magnetic block is embedded in the bottom of the support block, and the first annular magnetic block and the second annular magnetic block have opposite magnetic poles on the relative side walls.

[0009] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: the cross-section of the valve stem is rectangular, the bottom of the screw rod is provided with a rectangular groove adapted to the valve stem, the valve stem extends into the rectangular groove, and the upper end of the screw rod is fixedly connected to a rotating disk.

[0010] The utility model has the advantages that the vertical rod is pulled out upwards and the U-shaped plate is removed from the valve cover and the flange, so that the valve cover, the gasket and the valve core can be taken out in turn, which is convenient for inspection, maintenance or replacement of the valve core. The valve core can be stably installed in the valve body pipeline by performing the above operations in reverse. The operation is simple and easy to operate. By rotating the rotating disk to rotate the screw rod, the valve stem can rotate with the screw rod, driving the valve core to rotate, so that the channel opening on the valve core is connected or separated from the channel opening on the valve body pipeline, thereby realizing the opening or closing action. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the external three-dimensional structure of the bidirectional sealing control plug valve proposed by the utility model;

[0012] Figure 2 This is a schematic diagram of the top plan structure of the bidirectional sealing control plug valve proposed by the utility model;

[0013] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0014] Figure 4 for Figure 3 A magnified view of the structure at center;

[0015] Figure 5 This is a schematic diagram of the main plan structure of the bidirectional sealing control plug valve proposed by the utility model.

[0016] In the figure: 1. valve body pipeline; 2. valve core; 3. valve stem; 4. annular groove; 5. gasket; 6. annular column; 7. annular sealing gasket; 8. valve cover; 9. flange; 10. U-shaped plate; 11. vertical rod; 12. support block; 13. screw rod; 14. rotating disk. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] Reference Figure 1-Figure 5 As shown, a two-way sealed control plug valve comprises a valve body pipeline 1, a valve core 2, a valve stem 3 and a valve cover 8. The valve core 2 is installed in the valve body pipeline 1, and the valve stem 3 is installed on the valve core 2. The structure of the valve stem 3 and the valve core 2 is the prior art. By rotating the valve stem 3, the valve core 2 is driven to rotate together, so that the channel opening on the valve core 2 is connected or separated from the channel opening on the valve body pipeline 1 to achieve the opening or closing action. This is the prior art and will not be described in detail here. A gasket 5 is installed on the valve body pipeline 1. An annular groove 4 is opened at the upper end of the valve body pipeline 1. The bottom of the gasket 5 An annular column 6 is fixedly connected and extends into the annular groove 4. The outer wall of the annular column 6 is wrapped with a rubber sealing layer to ensure the sealing between the annular column 6 and the annular groove 4. The bottom of the gasket 5 is fixedly connected with an annular sealing gasket 7 which is tightly abutted against the upper end of the valve body pipeline 1 to further ensure the sealing between the gasket 5 and the valve body pipeline 1. A mounting port is opened through the gasket 5, and the valve stem 3 slides through the mounting port, and the inner wall of the mounting port is provided with an annular sealing gasket which abuts against the side wall of the valve stem 3 to ensure the sealing between the valve stem 3 and the gasket 5.

[0019] The outer wall of the valve body pipeline 1 is provided with a flange 9, and the flange 9 is connected to the valve cover 8 by a plurality of U-shaped plates 10. The U-shaped plate 10 is clamped on the flange 9 and the valve cover 8. The inner side walls of the upper and lower ends of the U-shaped plate 10 are respectively against the upper end of the valve cover 8 and the bottom of the flange 9. The inner side walls of the upper and lower sections of the U-shaped plate 10 are inclined to facilitate the clamping of the U-shaped plate 10 on the valve cover 8 and the flange 9. The U-shaped plate 10 can connect the valve cover 8 to the flange 9; the plurality of U-shaped plates 10 are connected to the flange 9 and the valve cover 8 by a plug rod assembly, and the U-shaped plate 10, the valve cover 8 and the flange 9 are all provided with through openings located on the same straight line, and the upper end of the U-shaped plate 10 is provided with a support opening, and the plug rod assembly includes a plurality of plugs that are slidably inserted together The vertical rod 11 in the through-port, the setting of the vertical rod 11 can stably connect the U-shaped plate 10 to the valve cover 8 and the flange 9, so that the U-shaped plate 10 will not fall off, the upper end of the vertical rod 11 is fixedly connected with a support block 12, and the support block 12 is abutted against the inner bottom of the support port, so that the vertical rod 11 will not fall off from the multiple through-ports, the inner bottom of the support port is embedded with a first annular magnetic block, and the bottom of the support block 12 is embedded with a second annular magnetic block, the first annular magnetic block and the second annular magnetic block have opposite magnetic poles on the opposite side walls, when the first annular magnetic block and the second annular magnetic block are opposite, an attractive force can be generated, so that the support block 12 cannot move up and down in a natural state, so that the vertical rod 11 can stably fix the U-shaped plate 10.

[0020] A screw rod 13 is rotatably connected to the valve cover 8 and is sleeved on the valve stem 3 and rotates synchronously therewith. The cross-section of the valve stem 3 is rectangular, and a rectangular groove adapted to the valve stem 3 is provided at the bottom of the screw rod 13. The valve stem 3 extends into the rectangular groove, so that when the screw rod 13 rotates, it can drive the valve stem 3 to rotate. A rotating disk 14 is fixedly connected to the upper end of the screw rod 13. The setting of the rotating disk 14 facilitates the rotation of the screw rod 13.

[0021] When the bidirectional sealing control cock valve of the utility model is in use, the rotating disk 14 is rotated to rotate the screw rod 13, and then the valve stem 3 can rotate together with the screw rod 13, driving the valve core 2 to rotate together, so that the channel opening on the valve core 2 is connected or separated with the channel opening on the valve body pipeline 1, thereby realizing the opening or closing action;

[0022] When the valve core 2 needs to be disassembled, the vertical rod 11 is pushed upward through the bottom of the U-shaped plate 10 to move the support block 12 upward and out of the support port, and then the vertical rod 11 can be pulled out upward, and the U-shaped plate 10 can be pulled out to remove it, and then the valve cover 8, the gasket 5 and the valve core 2 can be taken out in turn, which is convenient for the inspection, maintenance or replacement of the valve core 2; when the valve core 2 needs to be installed, the valve core 2 is moved downward and inserted into the valve body pipeline 1, and the annular column 6 is inserted into the annular groove 4 to install the gasket 5 on the valve body. On the pipeline 1, the valve stem 3 now passes through the gasket 5 and extends to the top of the gasket 5. The annular sealing gasket on the inner wall of the installation opening on the gasket 5 can ensure the sealing between the valve stem 3 and the gasket 5. The annular sealing gasket 7 can ensure the sealing between the gasket 5 and the valve body pipeline 1. The valve cover 8 is covered on the valve body pipeline 1 and the valve stem 3 is inserted into the screw rod 13. The U-shaped plate 10 is clamped on the edge of the valve cover 8 and the flange 9, and the vertical rod 11 is inserted into the corresponding through hole to stabilize and fix the U-shaped plate 10, thereby completing the installation of the valve core 2.

Claims

1. A bidirectional sealed control plug valve, comprising a valve body pipe (1), a valve core (2), a valve stem (3) and a valve cover (8), characterized in that: The valve core (2) is installed in the valve body pipeline (1), and a gasket (5) is installed on the valve body pipeline (1). The outer wall of the valve body pipeline (1) is provided with a flange (9), and the flange (9) is connected to the valve cover (8) by a plurality of U-shaped plates (10). The plurality of U-shaped plates (10) are connected to the flange (9) and the valve cover (8) by a plug rod assembly. A screw rod (13) is rotatably connected to the valve cover (8) and is sleeved on the valve stem (3) and rotates synchronously with the valve stem. An annular groove (4) is provided at the upper end of the valve body pipeline (1), and an annular column (6) is fixedly connected to the bottom of the gasket (5), and the annular column (6) extends into the annular groove (4). The outer wall of the annular column (6) is wrapped with a rubber sealing layer. The bottom of the gasket (5) is fixedly connected to an annular sealing gasket (7) that is tightly pressed against the upper end of the valve body pipeline (1).

2. The bidirectional sealing control plug valve according to claim 1, characterized in that: The U-shaped plate (10) is clamped on the flange (9) and the valve cover (8), and the inner side walls of the upper and lower ends of the U-shaped plate (10) are respectively abutted against the upper end of the valve cover (8) and the bottom of the flange (9), and the U-shaped plate (10), the valve cover (8) and the flange (9) are all provided with through openings located on the same straight line, and the upper end of the U-shaped plate (10) is provided with a support opening, and the plug rod assembly includes vertical rods (11) that are slidably inserted into the multiple through openings, and the upper ends of the vertical rods (11) are fixedly connected to support blocks (12), and the support blocks (12) are abutted against the inner bottom of the support opening.

3. The bidirectional sealing control plug valve according to claim 2, characterized in that: A first annular magnetic block is embedded in the inner bottom of the support opening, and a second annular magnetic block is embedded in the bottom of the support block (12), wherein the first annular magnetic block and the second annular magnetic block have opposite magnetic poles on their relative side walls.

4. The bidirectional sealing control plug valve according to claim 1, characterized in that: The cross section of the valve stem (3) is rectangular, the bottom of the screw rod (13) is provided with a rectangular groove matched with the valve stem (3), the valve stem (3) extends into the rectangular groove, and the upper end of the screw rod (13) is fixedly connected to a rotating disk (14).

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