A double-seal stop valve for pipes and a quick assembly method thereof

Abstract

The application discloses a pipeline double-seal stop valve and a quick assembling method thereof and belongs to the technical field of sealing stop valves. The pipeline double-seal stop valve comprises a first water pipe, a second water pipe and a sealing stop valve, the first water pipe and the second water pipe are arranged at two ends of the sealing stop valve respectively, a sleeve rod is rotationally connected to the top of the sealing stop valve, a rotating rod is movably connected to the top of the sleeve rod, a first operating disc is arranged at the top end of the rotating rod, a third gear is arranged on the outer surface of the sleeve rod, the first gear and the second gear are meshed with the two sides of the third gear respectively, the bottom of the first gear and the second gear is provided with a valve rod, and the end of the valve rod in the sealing stop valve is provided with a valve. The pipeline double-seal stop valve can better seal the first water pipe and the second water pipe, reduces the pressure that the valve needs to bear, avoids the valve from being affected by the impact of the flowing medium in the first water pipe and the second water pipe, and facilitates the connection of the flange with the first water pipe and the second water pipe.

Description

Technical Field

[0001] This invention relates to the field of sealing shut-off valve technology, and more specifically, to a pipeline double-sealing shut-off valve and its rapid assembly method. Background Technology

[0002] Gate valves, also known as stop valves, are among the most widely used valves. Their popularity stems from the low friction between the sealing surfaces during opening and closing, resulting in durability. They also have a small opening height, are easy to manufacture and maintain, and are suitable for both low and medium pressures as well as high pressures. The closing principle of a gate valve relies on the pressure of the valve stem to ensure a tight seal between the valve disc sealing surface and the valve seat sealing surface, preventing the flow of media. my country's valve standardization regulations once stipulated that the flow direction of gate valves should always be from top to bottom, thus requiring directional installation. Gate valves have a longer structural length than traditional gate valves, and also exhibit higher fluid resistance, leading to less reliable sealing over long-term operation.

[0003] Existing gate valves have a relatively cumbersome structure, and when the valve plate is corroded or damaged, uneven sealing may occur, resulting in poor sealing performance and easy failure to shut off, thus wasting resources. In addition, existing gate valves fix the valve plate through a threaded connection between the valve stem and the valve body. When the valve is subjected to the impact of the medium, the valve plate may rotate, thereby deteriorating its sealing performance. Furthermore, existing gate valves are mostly installed between two pipelines, and the distance between the two pipelines is difficult to adjust, making it inconvenient to connect to the valve body. Summary of the Invention

[0004] 1. Technical problems to be solved The purpose of this invention is to provide a double-sealed shut-off valve for pipelines to solve the problems mentioned in the background art. Existing gate valves have a relatively cumbersome structure, and when the valve plate is corroded or damaged, uneven sealing may occur, resulting in poor sealing performance and easy failure to shut off, thus wasting resources. In addition, existing gate valves fix the valve plate through a threaded connection between the valve stem and the valve body. When the valve is subjected to the impact of the medium, the valve plate may rotate, thereby deteriorating its sealing performance. Furthermore, existing gate valves are mostly installed between two pipelines, and the distance between the two pipelines is difficult to adjust, making it inconvenient to connect to the valve body.

[0005] 2. Technical Solution A double-sealed shut-off valve for pipelines includes a first water pipe, a second water pipe, and a sealing shut-off valve. The first water pipe and the second water pipe are respectively disposed at both ends of the sealing shut-off valve. A sleeve rod is rotatably connected to the top of the sealing shut-off valve, and a rotating rod is movably connected to the top of the sleeve rod. A first operating disc is disposed at the top of the rotating rod. A third gear is disposed on the outer surface of the sleeve rod. A first gear and a second gear are respectively meshed on both sides of the third gear. A valve stem is disposed at the bottom of both the first gear and the second gear. A valve is disposed at the end of the valve stem inside the sealing shut-off valve.

[0006] Preferably, the sleeve rod has a rotating hole inside that matches the rotating rod. The inner wall of the rotating hole has a second slot, and the surface of the rotating rod has a retaining plate that matches the second slot. The rotating rod is slidably connected to the rotating hole through the retaining plate set in the second slot.

[0007] Preferably, the surfaces of the sealing valves on both sides of the sleeve are provided with fixing posts, and the interior of the first operating panel is provided with openings that match the fixing posts.

[0008] Preferably, the top of the fixing column is provided with a first slot, and the surface of the first operating plate on the side of the opening is provided with a fixing block, and the fixing block is movably connected to a locking block that matches the first slot.

[0009] Preferably, the bottom of the fixed block is provided with a movable groove that matches the locking block, the inner wall of the movable groove is provided with a sliding groove, the surface of the locking block is provided with a slider that matches the sliding groove, and the locking block is slidably connected to the movable groove through the slider provided in the sliding groove.

[0010] Preferably, the side surface of the inner wall of the groove is provided with a spring connected to the slider.

[0011] Preferably, both ends of the sealing stop valve are movably connected to flanges, and a collar is provided on one side of the flange. The sealing stop valve is fixedly connected to the first water pipe and the second water pipe through the flanges. A guide plate is provided on the outer surface of the sealing stop valve, and the flanges and collar are slidably connected to the sealing stop valve through the guide plate.

[0012] Preferably, a fixing plate is provided at the bottom of the collar, a U-shaped block is provided at the bottom of the sealing stop valve, a bidirectional screw connected to the fixing plate is provided inside the U-shaped block, a second operating disc is provided on the surface of the bidirectional screw inside the U-shaped block, and a limit plate is provided at the end of the bidirectional screw outside the fixing plate.

[0013] A rapid assembly method for a pipeline double-seal shut-off valve, comprising the following steps: S1: When it is necessary to install this sealing stop valve, first place the sealing stop valve between the first water pipe and the second water pipe; S2: By rotating the second operating disc, the bidirectional lead screw is rotated, which in turn causes the fixed plate on the bidirectional lead screw to drive the collar and flange to move in opposite directions, so that the flange is connected to the ends of the first water pipe and the second water pipe. S3: Connect the flange to the first and second water pipes using bolts.

[0014] 3. Beneficial effects Compared with the prior art, the advantages of this invention are: 1) When using this double-sealed shut-off valve, rotating the first operating disc rotates the rotating rod, which in turn rotates the sleeve rod, causing the third gear to rotate. This, in turn, causes the first and second gears to rotate, which in turn causes the two valve stems to open or close the two valves, thus achieving a double seal on the first and second water pipes and cutting off the flow of the medium inside the first and second water pipes. Simply rotating the first operating disc is enough to open or close both valves simultaneously. When both valves are closed, they can better seal the first and second water pipes, reducing the pressure that the valves need to withstand.

[0015] 2) When using this double-sealed shut-off valve, after operating the valve through the first operating panel, in order to prevent the valve from rotating due to pressure, the first operating panel can be pressed to make the rotating rod enter the rotating hole. At this time, the fixed column enters the opening, and the valve is restricted by the fixed column restricting the first operating panel. This avoids the valve being affected by the impact of the flowing medium inside the first and second water pipes. The first slot and the locking block can better limit the first operating panel.

[0016] 3) When using this double-sealed shut-off valve, place it between the first and second water pipes. Then, rotate the second operating disc to rotate the double-acting screw, which in turn causes the fixing plate on the double-acting screw to move the collar and flange in opposite directions, so that the flange is connected to the ends of the first and second water pipes. Then, connect the flange to the first and second water pipes with bolts. It is convenient and quick. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sealing shut-off valve structure of the present invention; Figure 3 This is a schematic diagram of the flange structure of the present invention; Figure 4 This is a schematic diagram of the first operating panel structure of the present invention; Figure 5 This is a schematic diagram showing the internal cross-section of the fixing block of the present invention.

[0018] The following are the labels in the diagram: 1. First water pipe; 2. Second water pipe; 3. Sealing stop valve; 4. Flange; 5. Collar; 6. Guide plate; 7. First gear; 8. Second gear; 9. Third gear; 10. First operating panel; 11. Fixed column; 12. Fixed block; 13. Rotating rod; 14. Sleeve rod; 15. Locking block; 16. First locking groove; 17. Valve stem; 18. Valve; 19. U-block; 20. Two-way lead screw; 21. Second operating panel; 22. Limiting plate; 23. Fixed plate; 24. Opening; 25. Locking plate; 26. Rotating hole; 27. Second locking groove; 28. Movable groove; 29. ​​Slider; 30. Slide groove; 31. Spring. Detailed Implementation

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example 1: Existing gate valves have a relatively cumbersome structure, and when the valve plate is corroded or damaged, uneven sealing may occur, resulting in poor sealing performance and easy failure to shut off, thus wasting resources. The following solution addresses this problem.

[0023] Please see Figures 1 to 5A double-sealed shut-off valve for pipelines includes a first water pipe 1, a second water pipe 2, and a shut-off valve 3. The first water pipe 1 and the second water pipe 2 are respectively located at both ends of the shut-off valve 3. A sleeve rod 14 is rotatably connected to the top of the shut-off valve 3, and a rotating rod 13 is movably connected to the top of the sleeve rod 14. A first operating disc 10 is provided at the top of the rotating rod 13 for convenient operation. The rotating rod 13 is slidably connected to the sleeve rod 14. A third gear 9 is provided on the outer surface of the sleeve rod 14. The third gear 9 can simultaneously drive the first gear 7 and the second gear 8 to rotate, thereby driving the valve stem 17 to rotate, causing the valve 18 to rotate. The first gear 7 and the second gear 8 are respectively meshed on both sides of the third gear 9. The bottoms of the first gear 7 and the second gear 8 are both... The valve stem 17 is provided, and the end of the valve stem 17 inside the sealing stop valve 3 is provided with a valve 18. By rotating the rotating rod 13 through the first operating disc 10, the sleeve rod 14 is driven to rotate, causing the third gear 9 to rotate, which in turn causes the first gear 7 and the second gear 8 to rotate. This causes the two valve stems 17 to drive the two valves 18 to open or close, thereby achieving a double seal on the first water pipe 1 and the second water pipe 2, and cutting off the flow medium inside the first water pipe 1 and the second water pipe 2. The opening or closing of the two valves 18 can be achieved simultaneously by simply rotating the first operating disc 10. When the two valves 18 are in the closed state, the two valves 18 can better seal the first water pipe 1 and the second water pipe 2, reducing the pressure that the valves 18 need to bear.

[0024] The steps of using this invention are as follows: When using this double-sealed shut-off valve, firstly, the rotating rod 13 is rotated by the first operating disc 10, which in turn drives the sleeve rod 14 to rotate, causing the third gear 9 to rotate, which in turn causes the first gear 7 and the second gear 8 to rotate, thereby causing the two valve stems 17 to drive the two valves 18 to open or close, thus achieving a double seal on the first water pipe 1 and the second water pipe 2, and cutting off the flow medium inside the first water pipe 1 and the second water pipe 2. This solution only requires rotating the first operating disc 10 to simultaneously open or close the two valves 18. When the two valves 18 are in the closed state, the two valves 18 can better seal the first water pipe 1 and the second water pipe 2, reducing the pressure that the valves 18 need to bear.

[0025] Example 2: In existing gate valves, the valve plate is fixed by a threaded connection between the valve stem and the valve body. When the valve is subjected to the impact of the medium, the valve plate may rotate, resulting in a deterioration of its sealing performance. The following solution is used to address this issue.

[0026] Please see Figures 1 to 5The difference from embodiment 1 is that the sleeve rod 14 has a rotating hole 26 inside that matches the rotating rod 13. The inner wall of the rotating hole 26 has a second slot 27. The surface of the rotating rod 13 has a locking plate 25 that matches the second slot 27. The rotating rod 13 is slidably connected to the rotating hole 26 through the locking plate 25 in the second slot 27. Therefore, the rotation of the rotating rod 13 can drive the sleeve rod 14 to rotate. The surfaces of the sealing stop valves 3 on both sides of the sleeve rod 14 are provided with fixing posts 11. The interior of the first operating plate 10 has an opening 24 that matches the fixing posts 11. The insertion of the two fixing posts 11 into the openings 24 prevents the first operating plate 10 from rotating. The top of the fixing post 11 has a first slot 16. The surface of the first operating plate 10 on one side of the opening 24 has a fixing block 12. The interior of the fixing block 12 is movably connected to a locking block 15 that matches the first slot 16. The bottom of the fixing block 12 has a movable groove 28 that matches the locking block 15. The locking block 15 and the first... The first operating plate 10 can be fixed on the fixed post 11 by engaging the first slot 16. The inner wall of the movable groove 28 is provided with a sliding groove 30. The surface of the locking block 15 is provided with a slider 29 that matches the sliding groove 30. The locking block 15 is slidably connected to the movable groove 28 by the slider 29 provided in the sliding groove 30. The side surface of the inner wall of the sliding groove 30 is provided with a spring 31 connected to the slider 29. The spring 31 gives the locking block 15 an elastic force towards the first slot 16. After the valve 18 is operated by the first operating plate 10, in order to prevent the valve 18 from rotating due to pressure, the first operating plate 10 can be pressed to make the rotating rod 13 enter the rotating hole 26. At this time, the fixed post 11 enters the opening 24. The valve 18 is restricted by the restriction of the first operating plate 10 by the fixed post 11, which avoids the valve 18 being affected by the impact of the flowing medium inside the first water pipe 1 and the second water pipe 2. The engagement of the first slot 16 and the locking block 15 can better limit the first operating plate 10.

[0027] The steps of using this invention are as follows: When using this double-sealed shut-off valve, after operating the valve 18 through the first operating disc 10, in order to prevent the valve 18 from rotating due to pressure, the first operating disc 10 can be pressed to make the rotating rod 13 enter the rotating hole 26. At this time, the fixing column 11 enters the opening 24. The valve 18 is restricted by the restriction of the first operating disc 10 by the fixing column 11, which avoids the valve 18 being affected by the impact of the flowing medium inside the first water pipe 1 and the second water pipe 2. The first operating disc 10 can be better limited by the engagement of the first slot 16 and the locking block 15.

[0028] Example 3: In the existing technology, gate valves are mostly installed between two pipelines, but the distance between the two pipelines is difficult to adjust, making it inconvenient to connect to the valve body. The following solution is used to solve this problem.

[0029] Please see Figures 1 to 5 The difference between embodiments 1 and 2 is that both ends of the sealing valve 3 are movably connected to flanges 4, and a collar 5 is provided on one side of the flange 4. The sealing valve 3 is fixedly connected to the first water pipe 1 and the second water pipe 2 through the flanges 4. A guide plate 6 is provided on the outer surface of the sealing valve 3. The flanges 4 and the collar 5 are slidably connected to the sealing valve 3 through the guide plate 6. A fixing plate 23 is provided at the bottom of the collar 5. A U-shaped block 19 is provided at the bottom of the sealing valve 3. A bidirectional screw 20 connected to the fixing plate 23 is provided inside the U-shaped block 19. A screw hole matching the bidirectional screw 20 is provided inside the fixing plate 23. The surface of the bidirectional lead screw 20 inside block 19 is provided with a second operating panel 21, which facilitates the operation of the bidirectional lead screw 20 by the operator. A limit plate 22 is provided at the end of the bidirectional lead screw 20 outside the fixing plate 23. The sealing stop valve 3 is placed between the first water pipe 1 and the second water pipe 2. Then, by rotating the second operating panel 21, the bidirectional lead screw 20 is rotated, which in turn causes the fixing plate 23 on the bidirectional lead screw 20 to drive the collar 5 and flange 4 to move in the opposite direction, so that the flange 4 is connected to the end of the first water pipe 1 and the second water pipe 2. Then, the flange 4 is connected to the first water pipe 1 and the second water pipe 2 by bolts, which is convenient and quick.

[0030] The steps for using this invention are as follows: When using this double-sealed shut-off valve, if the shut-off valve 3 needs to be installed, first place the shut-off valve 3 between the first water pipe 1 and the second water pipe 2. Then, rotate the second operating disc 21 to rotate the bidirectional screw 20, which in turn causes the fixing plate 23 on the bidirectional screw 20 to drive the collar 5 and flange 4 to move in opposite directions, thereby adjusting the position of the flange 4 so that the flange 4 is connected to the end of the first water pipe 1 and the second water pipe 2. Then, the flange 4 is connected to the first water pipe 1 and the second water pipe 2 by bolts, which is convenient and quick.

[0031] A rapid assembly method for a pipeline double-seal shut-off valve, comprising the following steps: S1: When it is necessary to install the sealing stop valve 3, first place the sealing stop valve 3 between the first water pipe 1 and the second water pipe 2. S2: By rotating the second operating disc 21, the bidirectional lead screw 20 is rotated, which in turn causes the fixing plate 23 on the bidirectional lead screw 20 to drive the collar 5 and flange 4 to move in the opposite direction, so that the flange 4 is connected to the end of the first water pipe 1 and the second water pipe 2. S3: Connect flange 4 to the first water pipe 1 and the second water pipe 2 using bolts.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-sealed shut-off valve for pipelines, comprising a first water pipe (1), a second water pipe (2), and a sealing shut-off valve (3), wherein the first water pipe (1) and the second water pipe (2) are respectively disposed at both ends of the sealing shut-off valve (3), characterized in that: The top of the sealing stop valve (3) is rotatably connected to a sleeve rod (14), and the top of the sleeve rod (14) is movably connected to a rotating rod (13). The top of the rotating rod (13) is provided with a first operating disc (10). The outer surface of the sleeve rod (14) is provided with a third gear (9). The third gear (9) is meshed with a first gear (7) and a second gear (8) on both sides. The bottom of the first gear (7) and the second gear (8) are both provided with valve stems (17). The end of the valve stem (17) inside the sealing stop valve (3) is provided with a valve (18). The inside of the sleeve rod (14) is provided with a rotating hole (26) that matches the rotating rod (13). The inner wall of the rotating hole (26) is provided with a second slot (27). The surface of the rotating rod (13) is provided with a card plate (25) that matches the second slot (27). The rotating rod (13) is slidably connected to the rotating hole (26) through the card plate (25) provided in the second slot (27). The surfaces of the sealing valves (3) on both sides of the rod (14) are provided with fixed posts (11). The interior of the first operating plate (10) is provided with an opening (24) that matches the fixed post (11). The top of the fixed post (11) is provided with a first slot (16). The surface of the first operating plate (10) on one side of the opening (24) is provided with a fixed block (12). The interior of the fixed block (12) is movably connected with a locking block (15) that matches the first slot (16). The bottom of the fixed block (12) is provided with a movable groove (28) that matches the locking block (15). The inner wall of the movable groove (28) is provided with a sliding groove (30). The surface of the locking block (15) is provided with a slider (29) that matches the sliding groove (30). The locking block (15) is slidably connected to the movable groove (28) through the slider (29) provided in the sliding groove (30). The side surface of the inner wall of the sliding groove (30) is provided with a spring (31) that connects to the slider (29).

2. The pipeline double-sealed shut-off valve according to claim 1, characterized in that: Both ends of the sealing stop valve (3) are movably connected to flanges (4), and a collar (5) is provided on one side of the flange (4). The sealing stop valve (3) is fixedly connected to the first water pipe (1) and the second water pipe (2) through the flange (4). A guide plate (6) is provided on the outer surface of the sealing stop valve (3). The flange (4) and the collar (5) are slidably connected to the sealing stop valve (3) through the guide plate (6).

3. A pipeline double-sealed shut-off valve according to claim 2, characterized in that: The bottom of the collar (5) is provided with a fixing plate (23), the bottom of the sealing stop valve (3) is provided with a U-shaped block (19), the inside of the U-shaped block (19) is provided with a bidirectional screw (20) connected to the fixing plate (23), the surface of the bidirectional screw (20) inside the U-shaped block (19) is provided with a second operating plate (21), and the end of the bidirectional screw (20) outside the fixing plate (23) is provided with a limit plate (22).

4. A rapid assembly method for a pipeline double-sealed shut-off valve as described in claim 3, characterized in that: The steps are as follows: S1: When it is necessary to install the sealing stop valve (3), first place the sealing stop valve (3) between the first water pipe (1) and the second water pipe (2); S2: By rotating the second operating disc (21), the double-acting screw (20) is rotated, which in turn causes the fixing plate (23) on the double-acting screw (20) to drive the collar (5) and flange (4) to move in opposite directions, so that the flange (4) is connected to the end of the first water pipe (1) and the second water pipe (2); S3: Connect the flange (4) to the first water pipe (1) and the second water pipe (2) by bolts.

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