A gate valve with easy adjustment

Abstract

The application discloses a gate valve convenient to adjust, which comprises a valve body, a valve cover, a valve plate and a valve rod, a center hole is formed in the valve cover and used for the valve rod to pass through, one end of the valve rod is connected with the valve plate in the valve body, the inner wall of the center hole of the valve cover is symmetrically provided with moving blocks, a moving groove is formed in the valve cover and used for the moving blocks to shrink, a first spring is arranged in the moving groove and used for driving the moving blocks to extend out of the moving groove, the symmetric moving blocks are spliced to form a threaded hole which is threadedly connected with the valve rod, a driving block is protruded on the valve rod, the bottom of the moving block is provided with a wedge-shaped block which is abutted with the driving block, the driving block is moved to contact the wedge-shaped block to drive the moving block to move towards the moving groove, when the valve needs to be opened, the driving block on the valve rod is abutted with the wedge-shaped block to drive the moving block to shrink into the moving groove after the threaded part of the valve rod is rotated and moved upward, at this time, the valve rod is not threadedly connected with the valve cover, the valve plate can be directly lifted to move to the limit position, and the adjusting efficiency of the valve plate is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of valves, and in particular to a gate valve that is easy to adjust. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the transported medium. Based on their function, they can be classified into gate valves, check valves, regulating valves, etc.

[0003] For example, Chinese patent CN105065699B discloses a gate valve with good sealing performance. By replacing the traditional spring between the left and right valve plates with an elastic metal ring, the problem of spring failure leading to loosening between the left and right valve plates after prolonged use can be effectively overcome. Because the elastic metal ring abuts against the inner wall of the receiving cavity and its opening faces upward, this design ensures that the elastic metal ring continuously applies pressure along the axis of the flow channel. Therefore, the left and right valve plates are continuously subjected to elastic force to overcome the problem of insufficient sealing caused by wear of the valve seat or sealing surface. Furthermore, the left and right valve plates are limited and fixed using valve plate sleeves and snap-fit ​​sleeves. The fixing method is simple and reliable, resulting in better sealing performance and a longer service life compared to traditional gate valves.

[0004] In the above solution, when the valve needs to be opened, the valve stem is driven to rotate by turning the handwheel. The valve stem is threadedly connected to the valve cover, which continuously drives the valve plate to move upward to open the valve. When it is necessary to open the valve to the maximum state, the valve plate needs to be raised to the limit. During this process, the handwheel needs to be turned continuously. This results in slow adjustment speed and low adjustment efficiency, which needs to be further improved. Summary of the Invention

[0005] To further improve the efficiency of regulation, this application provides a gate valve that is easy to regulate.

[0006] This application provides a gate valve that is easy to adjust, using the following technical solution:

[0007] An easily adjustable gate valve includes a valve body, a valve cover, a valve plate, and a valve stem. The valve cover has a central hole through which the valve stem passes. One end of the valve stem is connected to the valve plate located inside the valve body. The valve cover has symmetrically arranged movable blocks on both sides of the inner wall corresponding to the central hole. The valve cover has a movable groove for the movable blocks to retract inward. A first spring is installed in the movable groove to drive the movable blocks to extend out of the groove. The symmetrical movable blocks are spliced ​​to form a threaded hole for threaded connection with the valve stem. A driving block protrudes from the valve stem. The bottom of each movable block has a wedge-shaped block that abuts against the driving block. The driving block moves upward to contact the wedge-shaped block, driving the movable block to move inward toward the movable groove.

[0008] By adopting the above technical solution, when the valve needs to be opened, after rotating the threaded part of the valve stem to move it upward, the driving block on the valve stem abuts against the wedge block, driving the moving block to retract into the moving groove. At this time, the valve stem is no longer threadedly connected to the valve cover, and the valve plate can be directly lifted to drive it to the limit position. There is no need to keep rotating to slowly drive the valve plate to move upward, which effectively improves the adjustment efficiency of driving the valve plate to move upward and put the valve in the fully open state.

[0009] Optionally, the drive block is horizontally slidably connected to the valve stem, the valve stem has a groove for the drive block to slide inward, a second spring is provided in the groove to drive the drive block to retract into the groove, and a drive member is provided on the valve stem to drive the drive block to extend outward.

[0010] By adopting the above technical solution, the drive block can be kept in the groove by means of the second spring. At this time, when the valve stem rotates and moves upward, it will not drive the moving block to move. The raising and lowering of the valve plate can still be stably achieved by the rotation of the valve stem connected by the thread. This is suitable for situations where the valve plate does not need to move upward significantly. When it is necessary to drive the drive block to extend out of the valve stem, the drive component is used to achieve this.

[0011] Optionally, the driving component includes a vertical rod slidably connected to the valve stem. The valve stem has a vertical hole at its center for the vertical rod to slide. The top end of the vertical rod extends out of the top of the valve stem to form an operating end. The bottom end of the vertical rod is located in the vertical hole. One end of the driving block is inserted into the vertical hole and has an inclined driving surface at its bottom end. The side wall of the vertical rod located in the vertical hole has a protrusion for abutting against the driving surface to drive the driving block to protrude out of the sliding groove.

[0012] By adopting the above technical solution, the vertical rod is lifted up, and the protrusion on the vertical rod abuts against the driving surface on the driving block, which drives the driving block to extend the valve rod. The structure is simple and the operation is convenient.

[0013] Optionally, the top side wall of the vertical rod is provided with an insertion hole and a limit pin is inserted into the insertion hole. When the insertion hole is higher than the top of the valve rod, the drive block protrudes from the sliding groove.

[0014] By adopting the above technical solution, when the valve stem is lifted so that the drive block is in the state of protruding from the slide groove, the socket is in the state of external leakage. The valve stem can be limited by inserting the limit pin into the socket, without the need for the operator to keep holding the valve stem, which is convenient and labor-saving.

[0015] Optionally, a rod is vertically slidably connected to the valve cover, one end of the rod is inserted into the moving groove, the moving block has a slot that cooperates with the rod, and a linkage is provided between the rod and the vertical rod to move them synchronously.

[0016] By adopting the above technical solution, the cooperation between the insert rod and the slot improves the stability of the moving block and makes the stability of the valve stem threaded connection better. When the valve plate needs to be moved up significantly for rapid adjustment, the vertical rod moves up and drives the insert rod to move up synchronously through the linkage, releasing the limit on the moving block. Only one operation of lifting the vertical rod is needed to simultaneously release the limit on the moving block and drive the block to protrude from the valve stem, making the operation more convenient.

[0017] Optionally, the linkage is a pull rope, one end of which is fixed to the vertical rod and the other end is fixed to the insertion rod.

[0018] By adopting the above technical solution, the insertion rod moves upward synchronously with the help of the pull rope during the upward movement of the vertical rod. When the vertical rod moves downward, the insertion rod will be inserted into the slot under its own gravity to achieve reset. The structure is simple and easy to implement.

[0019] Optionally, the top of the vertical rod has a hand handle, which is arranged radially along the valve rod, and the length of the hand handle is greater than the diameter of the vertical hole.

[0020] By adopting the above technical solution, the handheld lever provides a point of force to facilitate the upward movement of the vertical rod by hand, and the handheld lever can also limit the downward movement of the vertical rod, preventing the top of the vertical rod from retracting into the vertical hole and causing difficulties in operation.

[0021] Optionally, a third spring is provided at the bottom of the vertical hole. One end of the third spring is fixed to the bottom wall of the vertical hole, and the other end is fixed to the vertical rod. The third spring drives the vertical rod to move down and reset until the protrusion separates from the driving surface.

[0022] By adopting the above technical solution, the third spring plays the role of moving the vertical rod downward and resetting it. When no upward driving force is provided to the vertical rod, the vertical rod can be stably positioned in the vertical hole.

[0023] Optionally, the upper part of the central hole is filled with packing material, a packing gland is plugged into the valve cover, a pressure plate is provided on the valve cover to press the packing gland, and mounting grooves are symmetrically opened on the side wall of the valve stem. A limit strip is hinged in the mounting groove. When the limit strip flips out of the mounting groove and is supported on the pressure plate, the valve plate rises to the fully open state.

[0024] By adopting the above technical solution, after the valve plate is fully opened by lifting the valve stem, the limiting strip can be flipped and supported on the pressure plate to maintain the current position of the valve stem, eliminating the need for manual lifting and making the operation more labor-saving and convenient.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When the valve plate needs to be moved up significantly to achieve the fully open state, the vertical rod is lifted up so that the drive block extends out of the valve rod. At this time, when the valve rod is rotated to move up, the drive block will drive the moving block to retract into the moving groove. The valve rod is disconnected from the threaded connection with the valve cover, and the valve rod and valve plate can be lifted directly, which effectively improves the adjustment efficiency.

[0027] 2. The movable block can be stably used with the help of the insert rod and the slot. When it is necessary to disconnect the threaded connection of the valve stem, the insert rod is moved up and out of the slot at the same time when the vertical rod is lifted. No extra operation is required to release the movable block at the same time. The operation is convenient and quick.

[0028] 3. After the vertical rod is lifted, it can be limited by inserting the limit pin into the socket. When the valve rod is lifted to the full opening of the valve plate, the limit strip can be flipped outward and supported on the pressure plate. There is no need to lift it manually all the time, making the operation more labor-saving. Attached Figure Description

[0029] Figure 1 This is an overall structural diagram of an embodiment of this application.

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0031] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Valve plate; 5. Inlet; 6. Outlet; 7. Center hole; 8. Packing gland; 9. Pressure plate; 10. Handwheel; 11. Moving block; 12. Moving groove; 13. Wedge block; 14. Threaded hole; 15. First spring; 16. Drive block; 17. Slide groove; 18. Second spring; 19. Vertical rod; 20. Vertical hole; 21. Drive surface; 22. Protrusion; 23. Insertion hole; 24. Third spring; 25. Hand handle; 26. Insertion rod; 27. Slot; 28. Pull rope; 29. ​​Mounting groove; 30. Limiting strip. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0035] This application discloses a gate valve that is easy to adjust.

[0036] like Figure 1As shown, an easily adjustable gate valve includes a valve body 1, a valve cover 2, a valve stem 3, and a valve plate 4. The valve body 1 has an inlet 5 and an outlet 6 on both sides, respectively. The valve stem 3 is vertically arranged and one end passes through the valve cover 2 and is rotatably connected to the valve plate 4 located on the valve body 1. The valve cover 2 is fixed to the valve body 1 by bolts. A central hole 7 is opened on the valve cover 2 for the valve stem 3 to pass through. The space between the valve stem 3 and the inner wall of the central hole 7 is filled with packing to improve the sealing performance. A packing gland 8 is plugged into the upper end of the central hole 7. The packing gland 8 is used to compact the packing to ensure its sealing performance. A pressure plate 9 is also provided on the valve cover 2 to press the packing gland 8. A handwheel 10 is provided at the top of the valve stem 3 to facilitate the rotation of the valve stem 3 to drive the valve plate 4.

[0037] like Figure 1 and Figure 2 As shown, symmetrical movable blocks 11 are provided on the two side walls of the lower part of the central hole 7. The opposing sides of the movable blocks 11 are concave and spliced ​​together to form threaded holes 14 that are threaded to the valve stem 3. Thus, by rotating the valve stem 3, it can be gradually moved upward. The upward movement of the valve stem 3 drives the valve plate 4 at the bottom to move upward, thereby opening the valve. A movable groove 12 is provided on the valve cover 2 corresponding to the movable block 11 for horizontal sliding. A first spring 15 is provided in the movable groove 12 to drive the movable block 11 to move out of the movable groove 12. With the help of the first spring 15, the two movable blocks 11 are spliced ​​together to form threaded holes 14 and connected to the valve stem 3. One end of the first spring 15 is fixed to the movable block 11, and the other end is fixed to the bottom of the movable groove 12.

[0038] like Figure 1 and Figure 2 As shown, the bottom of the moving block 11 has a wedge-shaped block 13 forming an inclined surface, which is located on the side close to the valve stem 3. At the same time, the bottom end of the valve stem 3 is provided with driving blocks 16 on both sides. The bottom end of the valve stem 3 is provided with grooves 17 for the driving blocks 16 to slide horizontally. The driving blocks 16 can be housed in the grooves 17. A second spring 18 is provided in the grooves 17 to keep the driving blocks 16 retracted in the grooves 17. One end of the second spring 18 is fixed to the driving block 16, and the other end is fixed to the bottom wall of the grooves 17. In addition, a driving member is provided on the valve stem 3 to drive the driving blocks 16 to protrude out of the grooves 17.

[0039] like Figure 2As shown, the driving component includes a vertical rod 19 slidably connected to the valve stem 3. A vertical hole 20 is provided at the center of the valve stem 3 for the vertical rod 19 to slide vertically. The top of the vertical hole 20 is through-hole and the bottom is closed. The top of the vertical rod 19 protrudes from the vertical hole 20 to form an operating end. One end of the driving block 16 is inserted into the vertical hole 20 and has an inclined driving surface 21 at its bottom. A protrusion 22 is provided at the bottom of the vertical rod 19 for abutting against the driving surface 21. When the vertical rod 19 moves upward, the protrusion 22 abuts against the driving surface 21. 1. The end of the drive block 16 protrudes from the slide groove 17; at the same time, an insertion hole 23 is provided on one side of the top of the vertical rod 19. The insertion hole 23 is used to insert the limiting pin. When the vertical rod 19 is raised to the point where the drive block 16 protrudes from the slide groove 17, the position of the insertion hole 23 moves out of the vertical hole 20, so that the limiting pin can be inserted into the insertion hole 23 from the side. Part of the limiting pin is located outside the insertion hole 23 and supported on the top end face of the valve stem 3, so as to limit the vertical rod 19 and keep it stably in the current state.

[0040] like Figure 2 As shown, a third spring 24 is provided at the bottom of the vertical hole 20. One end of the third spring 24 is fixed to the bottom wall of the vertical hole 20, and the other end is fixed to the bottom end of the vertical rod 19. The third spring 24 is used to drive the vertical rod 19 to move down and reset until the protrusion 22 no longer abuts against the driving surface 21, thereby improving the stability of the vertical rod 19 in the vertical hole 20. A hand handle 25 is provided at the top of the vertical rod 19. The hand handle 25 is arranged radially and its length is greater than the diameter of the vertical hole 20. The hand handle 25 provides a point of force for easy lifting and can also prevent the top of the vertical rod 19 from retracting into the vertical hole 20 and becoming difficult to grasp.

[0041] like Figure 2 As shown, a rod 26 is vertically slidably connected to the top side wall of the moving groove 12 inside the valve cover 2. At the same time, a slot 27 that mates with the rod 26 is provided on the top of the moving block 11. The rod 26 and the slot 27 limit the position of the moving block 11, so that the moving block 11 can be stably maintained in its current state, improving the stability of the threaded connection between the valve stem 3 and the threaded hole 14. In addition, a linkage component is provided between the rod 26 and the vertical rod 19 to synchronize the two. In this embodiment, the linkage component includes a pull rope 28. One end of the pull rope 28 is fixed to the vertical rod 19, and the other end is fixed to the vertical rod 19. When the vertical rod 19 moves upward, the pull rope 28 pulls the rod 26 upward, simultaneously releasing the limitation of the rod 26 mates with the slot 27. When the vertical rod 19 moves downward, the rod 26 moves downward under its own weight and is inserted into the slot 27 to reset.

[0042] like Figure 1 and Figure 3As shown, mounting grooves 29 are provided on both symmetrical side walls of the valve stem 3. Limiting strips 30 are provided in the mounting grooves 29. The top center of the limiting strip 30 is rotatably connected to the mounting groove 29. By rotating the limiting strip 30, the bottom end of the limiting strip 30 can protrude out of the side wall of the valve stem 3. In this way, when the valve plate 4 is in the fully open limit position after the valve stem 3 is lifted, the limiting strip 30 can be flipped out and supported on the pressure plate 9 to prevent the valve stem 3 and valve plate 4 from falling. During operation, there is no need to manually lift the valve stem 3 continuously, so that the valve is always in a stable fully open state.

[0043] The working principle of this embodiment is as follows: When it is necessary to partially open the valve plate 4, the valve stem 3 is driven to rotate by turning the handwheel 10. The valve stem 3 and the threaded hole 14 of the valve cover 2 are threaded together and gradually move upward, thereby gradually driving the valve plate 4 to move upward to open the valve. When it is necessary to move the valve plate 4 to the limit position, that is, to make the valve fully open, the vertical rod 19 is lifted. During the upward movement of the vertical rod 19, the protrusion 22 at the bottom abuts against the driving surface 21, causing the driving block 16 to protrude out of the slide groove 17. At the same time, the pull rope 28 pulls the insertion rod 26 upward to the slot. 27. Separation is achieved, the limit of the moving block 11 is released, and then the limit pin is inserted into the socket 23 to limit the vertical rod 19. After the valve rod 3 is rotated appropriately, the driving block 16 abuts against the wedge block 13 to drive the moving block 11 to retract into the moving groove 12. At this time, the valve rod 3 is no longer threadedly connected to the threaded hole 14 of the valve cover 2. The valve rod 3 and the valve plate 4 can be directly lifted to the limit position. Then the limit strip 30 is flipped out and supported on the pressure plate 9 to realize the valve plate 4 to move up quickly to complete the adjustment of the fully open state.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gate valve that is easy to adjust, comprising a valve body (1), a valve cover (2), a valve plate (4), and a valve stem (3), wherein the valve cover (2) has a central hole (7) through which the valve stem (3) passes, and one end of the valve stem (3) is connected to the valve plate (4) located inside the valve body (1), characterized in that: The valve cover (2) has symmetrically arranged movable blocks (11) on both sides of the inner wall corresponding to the central hole (7). The valve cover (2) has a movable groove (12) for the movable blocks (11) to retract. The movable groove (12) is provided with a first spring (15) that drives the movable blocks (11) to extend out of the movable groove (12). The symmetrical movable blocks (11) are spliced ​​to form a threaded hole (14) that is threadedly connected to the valve stem (3). The valve stem (3) has a protruding drive block (16). The bottom of the moving block (11) has a wedge-shaped block (13) that abuts against the driving block (16). The driving block (16) moves upward to contact the wedge-shaped block (13), driving the moving block (11) to move inward toward the moving groove (12). The driving block (16) is horizontally slidably connected to the valve stem (3). The valve stem (3) has a sliding groove (17) for the driving block (16) to slide inward. The sliding groove (17) is provided with a mechanism to drive the driving block (16) to retract into the groove. 17) The second spring (18) is provided on the valve stem (3), and a driving member is provided to drive the driving block (16) to extend outward; the driving member includes a vertical rod (19) that is vertically slidably connected in the valve stem (3), and a vertical hole (20) for the vertical rod (19) to slide is opened in the center of the valve stem (3). The top end of the vertical rod (19) extends out of the top of the valve stem (3) to form an operating end, and the bottom end of the vertical rod (19) is located in the vertical hole (20). One end of the driving block (16) is inserted into the hole. The vertical hole (20) has an inclined driving surface (21) at the bottom. The vertical rod (19) has a protrusion (22) on the side wall inside the vertical hole (20) for abutting the driving surface (21) to drive the driving block (16) to protrude out of the slide groove (17). The top side wall of the vertical rod (19) has an insertion hole (23) and a limit pin is inserted into the insertion hole (23). When the insertion hole (23) is higher than the top of the valve rod (3), the driving block (16) protrudes out of the slide groove (17).

2. The gate valve for easy adjustment according to claim 1, characterized in that: A rod (26) is vertically slidably connected to the valve cover (2). One end of the rod (26) is inserted into the moving groove (12). A slot (27) is provided on the moving block (11) to cooperate with the rod (26). A linkage component is provided between the rod (26) and the vertical rod (19) to move them synchronously.

3. The gate valve for easy adjustment according to claim 2, characterized in that: The linkage component is a pull rope (28), one end of which is fixed to the vertical rod (19) and the other end is fixed to the insertion rod (26).

4. The gate valve for easy adjustment according to claim 1, characterized in that: The top of the vertical rod (19) has a hand handle (25), which is arranged radially along the valve stem (3), and the length of the hand handle (25) is greater than the diameter of the vertical hole (20).

5. The gate valve for easy adjustment according to claim 4, characterized in that: A third spring (24) is provided at the bottom of the vertical hole (20). One end of the third spring (24) is fixed to the bottom wall of the vertical hole (20), and the other end is fixed to the vertical rod (19). The third spring (24) drives the vertical rod (19) to move down and reset until the protrusion (22) separates from the driving surface (21).

6. The gate valve for easy adjustment according to claim 1, characterized in that: The upper part of the central hole (7) is filled with packing material, and a packing gland (8) is plugged into the valve cover (2). A pressure plate (9) is provided on the valve cover (2) to press the packing gland (8). A mounting groove (29) is symmetrically opened on the side wall of the valve stem (3). A limit strip (30) is hinged in the mounting groove (29). When the limit strip (30) flips out from the mounting groove (29) and is supported on the pressure plate (9), the valve plate (4) rises to the fully open state.

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