A gate valve

Abstract

The utility model discloses a gate valve, including valve body, valve seat, valve core and valve rod, the valve rod one end is connected with valve core, and the other end is connected with hand wheel and is worn out valve body, be provided with the gear box of both's connection between hand wheel and valve rod, hand wheel is vertically arranged, the bottom end of hand wheel is close to valve body and is arranged, be provided with the limiting part for connecting both and limiting between hand wheel and valve body, through vertically setting hand wheel and the major outer diameter of hand wheel, make hand wheel operate more labor saving like this, and hand wheel vertically arranged like this can utilize the space of vertical, do not exist because hand wheel outer diameter amplification and lead to horizontal space occupy the big phenomenon, do not need to operate hand wheel when usually, can limit hand wheel through limiting part to limit, thereby effectively prevent the phenomenon of hand wheel misoperation.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a gate valve. Background Technology

[0002] Gate valves are a common type of linear motion shut-off valve. Their core working principle is that the valve stem drives the gate in the valve body to move up and down perpendicular to the fluid flow direction, thereby changing the flow cross-sectional area between the gate and the valve seat, and realizing the function of connecting, cutting off or regulating the flow of fluid in the pipeline.

[0003] Currently, gate valves mainly use a handwheel horizontally mounted on top to drive the valve stem to rotate, thereby driving the gate to rise and fall to achieve the purpose of opening and closing. Because the handwheel is small, it requires a large force to operate, making it relatively laborious. Enlarging the handwheel would result in it occupying a large horizontal space, which needs further improvement. Utility Model Content

[0004] To further make the operation of the handwheel easier and less strenuous, this application provides a gate valve.

[0005] This application provides a gate valve, which adopts the following technical solution: A gate valve includes a valve body, a valve seat, a valve core, and a valve stem. One end of the valve stem is connected to the valve core, and the other end extends out of the valve body and is connected to a handwheel. A gearbox is provided between the handwheel and the valve stem to connect the two. The handwheel is vertically arranged, and the bottom end of the handwheel is located close to the valve body. A limiting member is provided between the handwheel and the valve body for connecting the two and limiting their movement.

[0006] Optionally, the limiting component includes a limiting rod, one end of which is threaded to the valve body. The handwheel includes spokes and an outer ring, with an annular groove on the side of the outer ring facing the valve body. The end of the limiting rod away from the valve body is located in the annular groove and slides within it.

[0007] Optionally, the end sidewall of the limiting rod is in line contact with the inner wall of the annular groove.

[0008] Optionally, the end of the limiting rod is elastically connected to a limiting block, and the bottom wall of the outer ring corresponding to the ring groove has a limiting hole for engaging with the limiting block. The limiting hole is through-hole, and a plug is threadedly connected to the limiting hole. The end of the plug away from the limiting block has an operating part.

[0009] Optionally, the gearbox is provided with an oil filling port, an oil bag is connected to the oil filling port, the oil bag has an oil storage chamber for storing oil, the oil bag has an oil outlet connected to the oil filling port, and a pressure relief valve is provided at the oil outlet.

[0010] Optionally, the handwheel is connected to an abutment post for pressing against the oil bag.

[0011] Optionally, the handwheel is provided with a threaded hole that is threadedly connected to the abutment post.

[0012] Optionally, the threaded holes are spaced in multiples.

[0013] Optionally, the valve body is provided with a valve cover that is detachable from it, a sealing seat is provided between the valve cover and the valve stem, a sealing packing is provided between the sealing seat and the valve stem, and a pressure cap is provided on the sealing seat for pressing the packing.

[0014] Optionally, the gearbox includes a housing and a rotating sleeve, the rotating sleeve being threadedly connected to the valve stem, the handwheel having a drive end at its center, and the drive end and the rotating sleeve being provided with meshing bevel gears.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting the handwheel vertically and having a larger outer diameter, the handwheel is easier to operate. Moreover, this vertical setting makes efficient use of vertical space and avoids the problem of excessive horizontal space being occupied due to the enlarged outer diameter of the handwheel. When the handwheel is not in use, it can be limited by a limiting component to effectively prevent accidental operation. 2. The end of the limit rod slides into the annular groove on the handwheel. When the handwheel rotates, the limit rod can play a certain guiding role, improve the stability of the handwheel rotation, and reduce the phenomenon of handwheel shaking or deviation. When the handwheel needs to be circumferentially limited, simply rotate the block to move outward to reserve the limit hole. Then rotate the handwheel until the limit block corresponds to the limit hole. The limit can be achieved by the engagement of the limit block and the limit hole, so that the handwheel can no longer rotate, thereby preventing the valve from being opened or closed due to subsequent misoperation of the handwheel. 3. The oil in the oil bag can lubricate the gears in the gearbox. When the handwheel is turned, the oil bag is squeezed by the abutment column, which increases the internal pressure and opens the pressure relief valve. The oil is discharged from the oil outlet and enters the oil inlet, realizing automatic oiling of the gearbox. Attached Figure Description

[0016] Figure 1 This is a perspective view of Example 1.

[0017] Figure 2 This is a cross-sectional view of Example 1.

[0018] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0019] Figure 4 This is a cross-sectional view of Example 2.

[0020] Explanation of reference numerals in the attached figures: 1. Valve body; 2. Valve seat; 3. Valve core; 4. Valve stem; 5. Connecting port; 6. Valve cover; 7. Handwheel; 8. Gearbox; 9. Housing; 10. Rotary sleeve; 11. Drive end; 12. Bevel gear; 13. Spoke; 14. Outer ring; 15. Limit rod; 16. Annular groove; 17. Sliding groove; 18. Limit block; 19. Spring; 20. Limit hole; 21. Plug; 22. Operating part; 23. Sealing seat; 24. Packing; 25. Gland; 26. Pressure plate; 27. Bolt; 28. Oil bag; 29. ​​Oil reservoir; 30. Abutment column; 31. Oil inlet; 32. Oil outlet; 33. Pressure relief valve. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0022] Example 1, a gate valve, such as Figures 1-3 As shown, the valve includes a valve body 1, a valve seat 2, a valve core 3, and a valve stem 4. The valve body 1 has an inlet and an outlet. The valve seat 2 is fixedly installed inside the valve body 1 and has a connecting port 5. The valve core 3 is adapted to the connecting port 5. The valve stem 4 is vertically arranged and its bottom end is fixed to the valve core 3. The top of the valve body 1 has a valve cover 6 that is detachably connected to it. The valve stem 4 is vertically arranged and passes through the valve cover 6. The top of the valve stem 4 is provided with a handwheel 7 connected to it. A gearbox 8 is provided between the handwheel 7 and the valve stem 4 to drive the two. By driving the handwheel 7 to rotate, the valve stem 4 is driven to rise and fall, realizing the vertical rise and fall of the valve stem 4. The rise and fall of the valve stem 4 drives the rise and fall of the valve core 3 to realize the opening and closing of the gate valve.

[0023] like Figure 2 As shown, the gearbox 8 includes a housing 9 and a rotating sleeve 10. The rotating sleeve 10 is rotatably connected inside the housing 9 and threadedly connected to the valve stem 4. The rotation center of the handwheel 7 has a drive end 11. Both the drive end 11 and the rotating sleeve 10 are fixedly provided with meshing bevel gears 12. Power transmission is achieved through the bevel gears 12. In this way, rotating the handwheel 7 can drive the rotating sleeve 10 to rotate, thereby realizing the raising and lowering of the valve stem 4.

[0024] like Figure 1 and Figure 2 As shown, in this embodiment, the handwheel 7 is vertically arranged and has a large overall outer diameter. The bottom end of the handwheel 7 is located close to the surface of the valve body 1. By vertically arranging the handwheel 7 and having a large outer diameter, the handwheel 7 is easier to operate. Moreover, this vertical arrangement of the handwheel 7 can make reasonable use of vertical space and avoid the phenomenon that the horizontal space is occupied by the enlarged outer diameter of the handwheel 7.

[0025] like Figure 1 and Figure 2As shown, the handwheel 7 includes spokes 13 and an outer ring 14. The outer ring 14 connects each spoke 13. Multiple spokes 13 are evenly distributed around the circumference. A limiting component is provided between the handwheel 7 and the valve body 1 to connect the two. The limiting component includes a horizontally arranged limiting rod 15. One end of the limiting rod 15 is threaded to the valve body 1. The outer ring 14 of the handwheel 7 has a concave annular groove 16. The end of the limiting rod 15 away from the valve body 1 is inserted into the annular groove 16 and slides to fit it. In this way, when the handwheel 7 rotates, the limiting rod 15 can play a certain guiding role, improve the stability of the handwheel 7 rotation, and reduce the phenomenon of handwheel 7 shaking or deviating.

[0026] like Figure 2 and Figure 3 As shown, a limiting block 18 is elastically provided at the end of the limiting rod 15 located within the annular groove 16. A sliding groove 17 is provided at the end of the limiting rod 15, and the limiting block 18 is slidably connected within the sliding groove 17. A spring 19 is provided within the sliding groove 17 to drive the limiting block 18 to move outward. At the same time, a limiting hole 20 corresponding to the limiting block 18 is provided on the bottom wall of the annular groove 16. The limiting hole 20 penetrates the outer ring 14, and a matching plug 21 is threadedly connected to the limiting hole 20. The end of the plug 21 away from the limiting block 18 has an operating part 22, which is in the shape of a regular hexagonal prism. The operating part 22 facilitates the rotation of the plug 21. Thus, when the handwheel 7 needs to be circumferentially limited, it is only necessary to rotate the plug 21 to move it outward. With the limiting hole 20 left open, when the handwheel 7 is rotated until the limiting block 18 corresponds to the limiting hole 20, the limiting block 18 and the limiting hole 20 can be engaged to achieve the limiting, preventing the handwheel 7 from rotating further. This prevents the valve from opening or closing due to the lack of operation of the handwheel 7. When it is necessary to rotate the handwheel 7, the blocking block 21 is rotated to close the entire limiting hole 20. The blocking block 21 moves forward to drive the limiting block 18 into the sliding groove 17 to release the limiting. At this time, the handwheel 7 can be rotated, and the limiting rod 15 slides relative to the annular groove 16 of the handwheel 7. In this embodiment, the end side wall of the limiting rod 15 is in line contact with the inner wall of the annular groove 16, which can reduce frictional resistance to a certain extent and facilitate the rotation operation of the handwheel 7.

[0027] like Figure 1 and Figure 2 As shown, a sealing seat 23 is provided between the valve cover 6 and the valve stem 4, and a packing 24 for sealing is provided between the sealing seat 23 and the valve stem 4. A gland 25 for pressing the packing 24 is provided on the sealing seat 23, and a pressure plate 26 for pressing down the gland 25 is sleeved on the valve stem 4. The pressure plate 26 is fixedly connected to the sealing seat 23 by bolts 27. In this way, the packing 24 is pressed by the pressure plate 26 and the gland 25, and the sealing performance at the connection of the valve stem 4 is effectively improved by the packing 24.

[0028] Example 2, a gate valve, such as Figure 4As shown, the main difference between this embodiment and Embodiment 1 is that an oil inlet 31 is provided on the top of the housing 9, and an oil bag 28 is provided at the oil inlet 31. The oil bag 28 has an oil replenishment port for oil replenishment. The oil bag 28 has a certain deformation capacity and can be made of rubber material. The oil bag 28 has an oil storage chamber 29 inside. The oil bag 28 has an oil outlet 32 ​​corresponding to the oil inlet 31, and a pressure relief valve 33 is provided at the oil outlet 32. A handwheel 7 is detachably connected to... The abutment post 30 used to press against the oil bag 28 can replenish oil into the gearbox 8 through the oil inlet 31, which can provide better lubrication for the internal bevel gear 12. In addition, thanks to the design of the abutment post 30, the handwheel 7 can intermittently press against the oil bag 28 during rotation, which increases the internal pressure and causes the pressure relief valve 33 to open. The oil in the oil storage chamber 29 can be injected into the gearbox 8 through the oil inlet 31, realizing automatic oiling of the gearbox 8.

[0029] like Figure 4 As shown, the handwheel 7 has threaded holes for threaded connection of the abutment post 30, and multiple threaded holes are arranged at radial intervals along the handwheel 7. This allows the abutment post 30 to be detached, so that the abutment post 30 can be removed when the gearbox 8 does not need to be lubricated. At the same time, the installation position of the abutment post 30 can be adjusted according to the different heights of the oil bag 28 to ensure the good performance of the abutment post 30.

[0030] 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, characterized in that: The valve includes a valve body (1), a valve seat (2), a valve core (3), and a valve stem (4). One end of the valve stem (4) is connected to the valve core (3), and the other end extends out of the valve body (1) and is connected to a handwheel (7). A gearbox (8) is provided between the handwheel (7) and the valve stem (4) to connect the two. The handwheel (7) is arranged vertically, and the bottom end of the handwheel (7) is located close to the valve body (1). A limiting member is provided between the handwheel (7) and the valve body (1) to connect the two and limit their movement.

2. A gate valve according to claim 1, characterized in that: The limiting component includes a limiting rod (15), one end of which is threaded to the valve body (1). The handwheel (7) includes spokes (13) and an outer ring (14). The outer ring (14) has an annular groove (16) on the side facing the valve body (1). The end of the limiting rod (15) away from the valve body (1) is located in the annular groove (16) and slides therewith.

3. A gate valve according to claim 2, characterized in that: The end sidewall of the limiting rod (15) is in line contact with the inner wall of the annular groove (16).

4. A gate valve according to claim 2, characterized in that: The end of the limiting rod (15) is elastically connected to a limiting block (18). The bottom wall of the outer ring (14) corresponding to the ring groove (16) has a limiting hole (20) for engaging with the limiting block (18). The limiting hole (20) is through-hole. A plug (21) is threadedly connected to the limiting hole (20). The end of the plug (21) away from the limiting block (18) has an operating part (22).

5. A gate valve according to claim 1, characterized in that: The gearbox (8) is provided with an oil inlet (31), and an oil bag (28) is connected to the oil inlet (31). The oil bag (28) has an oil storage chamber (29) for storing oil. The oil bag (28) has an oil outlet (32) connected to the oil inlet (31), and a pressure relief valve (33) is provided at the oil outlet (32).

6. A gate valve according to claim 5, characterized in that: The handwheel (7) is connected to an abutment post (30) for pressing against the oil bag (28).

7. A gate valve according to claim 6, characterized in that: The handwheel (7) is provided with a threaded hole that is threadedly connected to the abutment post (30).

8. A gate valve according to claim 7, characterized in that: The threaded holes are spaced in multiples.

9. A gate valve according to claim 1, characterized in that: The valve body (1) is provided with a valve cover (6) that is detachable from it. A sealing seat (23) is provided between the valve cover (6) and the valve stem (4). A packing material (24) for sealing is provided between the sealing seat (23) and the valve stem (4). A pressure cap (25) for pressing the packing material (24) is provided on the sealing seat (23).

10. A gate valve according to claim 1, characterized in that: The gearbox (8) includes a housing (9) and a rotating sleeve (10). The rotating sleeve (10) is threadedly connected to the valve stem (4). The handwheel (7) has a drive end (11) at its center. The drive end (11) and the rotating sleeve (10) are provided with bevel gears (12) that mesh with each other.

Images