Pressure regulating type gate valve

Abstract

The utility model discloses a pressure regulating type gate valve which comprises a valve body, a valve cover, a valve rod penetrating through the valve cover to reach the interior of the valve body, a gate plate connected with the lower end of the valve rod and a control hand wheel device for regulating the lifting of the valve rod. Sealing plates are fixedly arranged on the two sides of the center of the circulation channel, a center plate is fixedly arranged between the sealing plates, the center plate divides the sealing plates into an inflow area and an outflow area, an inflow port is formed in the position, corresponding to the inflow area, of the sealing plate on one side, and an outflow port is formed in the position, corresponding to the outflow area, of the sealing plate on the other side. A flow-out opening is formed in the position, corresponding to the flow-out area, of the sealing plate on the other side, the flashboard is arranged in the flow-in area, a center hole is formed in the center of the center plate, and a pressure adjusting structure is arranged in the flow-out area; according to the utility model, the adjustment of flow pressure can be effectively realized, so that the throttling of a medium is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, and more specifically to a pressure regulating gate valve. Background Art

[0002] The gate valve's opening and closing parts are gate plates, the movement direction of which is perpendicular to the direction of the fluid. The gate valve can only be fully opened or fully closed, and cannot be adjusted or throttled. The gate valve completes the adjustment of the switch through the valve stem, completing the opening and closing of the gate valve, so that the gate valve can be used.

[0003] In the prior art, there is a pressure-regulating gate valve with a publication number of CN215110528U, which can adjust the flow pressure through a pressure-regulating device, which is beneficial to the use of the gate valve in pipeline connections, avoids the need to add a valve for adjusting the pressure, and greatly saves the installation cost of the pipeline connection; however, the utility model still has the following problems: the flow pressure of the gate valve needs to be adjusted by energizing the solenoid to generate magnetic force and attract the pressure-regulating ball, the gate valve itself is also made of metal, and the internal parts are also made of metal, which will affect the magnetic force, resulting in the inability to accurately control the suction force on the regulating ball, so that the flow pressure of the gate valve does not need to reach a fixed value according to demand, and cannot be effectively adjusted and throttled. In addition, the sealed pressure-regulating ball is located at the upper end of the spring and is not fixed. Under the impact of the medium, there will be a certain offset, which will cause the pressure-regulating ball to be unable to return to its position, and subsequent effective pressure regulation cannot be achieved. Therefore, the utility model proposes a pressure-regulating gate valve. Utility Model Content

[0004] The utility model aims to provide a pressure regulating gate valve, which can effectively adjust the flow pressure and thus realize the throttling of the medium.

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

[0006] A pressure regulating gate valve comprises a valve body, a valve cover, a valve stem penetrating the valve cover and reaching the inside of the valve body, a gate plate connected to the lower end of the valve stem, and a control hand wheel device for adjusting the lifting and lowering of the valve stem. A communicating flow channel is arranged in the valve body, a valve cavity is arranged at the upper end of the flow channel, sealing plates are fixedly arranged on both sides of the center of the flow channel, a center plate is fixedly arranged between the sealing plates, and the center plate divides the sealing plates into an inflow area and an outflow area. The sealing plate on one side is provided with an inflow port at a position corresponding to the inflow area, and the sealing plate on the other side is provided with an inflow port at a position corresponding to the outflow area. An outflow port is provided at the position of the zone, the gate plate is provided in the inflow zone, a center hole is provided in the center of the center plate, a pressure regulating structure is provided in the outflow zone, the pressure regulating structure includes a fixed column, an embedded groove is provided at the upper end of the fixed column, a sealing block is embedded in the embedded groove, the upper end of the sealing block is abutted against the center hole, a push plate is provided at the lower end of the sealing block, a high-elastic spring is fixed between the push plate and the sealing block, a threaded column is rotatably connected to the lower end of the push plate, the threaded column extends to the outside of the valve body, and a scale line is provided at the upper end of the threaded column.

[0007] By adopting the above technical solution, the utility model has the following advantages:

[0008] The sealing block, high-elastic spring, push plate and threaded column of the utility model are arranged so that when the medium flows, the sealing block can be squeezed toward the high-elastic spring, so that the center hole is communicated with the outflow area. At this time, the medium can enter the circulation channel through the center hole and the outflow area for discharge. By driving the threaded column to move inward, the push plate is pushed toward the high-elastic spring to change the pressure of the high-elastic spring, so that the distance that the medium pushes the sealing block is changed, and the flow pressure is adjusted. According to the position of the scale line, the staff can accurately control the value of the flow pressure. In addition, the lower end of the sealing block is clamped in the embedded groove, so that the sealing block can only move up and down and will not be offset by the impact of the medium, so the flow pressure can be effectively adjusted.

[0009] Furthermore, a through groove is provided at the lower end of the valve body corresponding to the position of the fixing column, the lower end of the fixing column is clamped in the through groove, a fixing plate is fixed to the lower end of the valve body by bolts, the threaded column passes through the fixing plate and is screwed to the fixing plate, and a handle is fixed to the lower end of the threaded column.

[0010] By adopting the above technical solution, the utility model has the following advantages:

[0011] The provision of the through slot and the fixing plate of the utility model enables the fixing column to be taken out, which is convenient for subsequent maintenance and replacement.

[0012] Furthermore, sliders are fixedly provided on both sides of the lower end of the sealing block, and sliding grooves are provided at both ends of the embedded groove, and the sliders are clamped in the corresponding sliding grooves.

[0013] By adopting the above technical solution, the utility model has the following advantages:

[0014] The arrangement of the sliding block and the sliding groove of the utility model enables the sealing block to only move up and down without any deviation.

[0015] Furthermore, a protrusion one is provided at the upper end of the sealing block, and the protrusion one is clamped in the center hole.

[0016] By adopting the above technical solution, the utility model has the following advantages:

[0017] The provision of the convex part of the utility model strengthens the sealing performance between the sealing block and the central hole, and can effectively prevent the leakage of the medium.

[0018] Furthermore, a sealing groove is provided at a position of the valve body corresponding to the fixing column, and a sealing ring 1 is embedded in the sealing groove.

[0019] By adopting the above technical solution, the utility model has the following advantages:

[0020] The provision of the sealing ring of the utility model strengthens the sealing performance between the valve body and the fixing column, and can effectively prevent the leakage of the medium.

[0021] Furthermore, a second protrusion is fixedly provided at the lower end of the gate plate, and the second protrusion is clamped in the center hole.

[0022] By adopting the above technical solution, the utility model has the following advantages:

[0023] The provision of the second protrusion of the utility model strengthens the sealing performance between the gate plate and the central hole, and can effectively prevent medium leakage.

[0024] Furthermore, a boss is fixedly provided on the valve body at a position corresponding to the center of the valve cavity, a top plate is clamped on the boss, a sealing portion is provided on the upper end of the top plate, the lower end of the valve stem passes through the sealing portion and the top plate, an inner ring groove is provided at the connection between the valve cover and the inner side of the valve body, an annular clamping portion is provided on the sealing portion at a position corresponding to the inner ring groove, the annular clamping portion is clamped in the inner ring groove, and a sealing ring 2 is clamped on the lower end of the annular clamping portion.

[0025] By adopting the above technical solution, the utility model has the following advantages:

[0026] The arrangement of the sealing part and the top plate of the utility model improves the sealing performance between the valve stem and the valve body and the valve cover, and can effectively prevent the leakage of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1It is a schematic diagram of the cross-sectional structure of the utility model;

[0029] Figure 2 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0030] 1. Valve body; 101. Valve cavity; 102. Circulation channel; 103. Inflow area; 104. Outflow area; 2. Threaded column; 201. Scale line; 202. Push plate; 3. Fixed column; 301. Embedded groove; 302. Slide groove; 4. Sealing block; 401. Sliding block; 402. Protrusion one; 5. Through groove; 501. Sealing groove; 6. Gate; 601. Protrusion two; 7. Center plate; 701. Center hole; 8. Sealing plate; 9. Inflow port; 10. Handle; 11. Outflow port; 12. Valve stem; 13. Top plate; 14. Boss; 15. Sealing part; 16. Sealing ring two; 17. Annular clamp; 18. Valve cover; 19. Inner ring groove; 20. Control hand wheel device; 21. Fixed plate; 22. Sealing ring one; 23. High elastic spring. DETAILED DESCRIPTION

[0031] like Figure 1 to Figure 2As shown, in the specific embodiment, a pressure regulating gate valve includes a valve body 1, a valve cover 18, a valve stem 12 that penetrates the valve cover 18 and reaches the inside of the valve body 1, a gate plate 6 connected to the lower end of the valve stem 12, and a control handwheel device 20 for adjusting the lifting and lowering of the valve stem 12. A communicating flow channel 102 is provided in the valve body 1, and a valve cavity 101 is provided at the upper end of the flow channel 102. Sealing plates 8 are fixedly provided on both sides of the center of the flow channel 102, and a center plate 7 is fixedly provided between the sealing plates 8. The center plate 7 divides the sealing plates 8 into an inflow area 103 and an outflow area 104. The sealing plate 8 on one side is provided at a position corresponding to the inflow area 103. There is an inlet 9, and a flow outlet 11 is provided at a position of the sealing plate 8 on the other side corresponding to the outflow area 104. A gate plate 6 is provided in the inflow area 103, and a center hole 701 is provided in the center of the center plate 7. A pressure regulating structure is provided in the outflow area 104, and the pressure regulating structure includes a fixed column 3, an embedded groove 301 is provided at the upper end of the fixed column 3, and a sealing block 4 is embedded in the embedded groove 301. The upper end of the sealing block 4 is against the center hole 701, and a push plate 202 is provided at the lower end of the sealing block 4. A high-elastic spring 23 is fixed between the push plate 202 and the sealing block 4. A threaded column 2 is rotatably connected at the lower end of the push plate 202, and the threaded column 2 extends to the outside of the valve body 1. The upper end of the threaded column 2 A scale line 201 is provided; a through groove 5 is provided at the position of the fixed column 3 at the lower end of the valve body 1, and the lower end of the fixed column 3 is clamped in the through groove 5. A fixed plate 21 is fixed to the lower end of the valve body 1 by bolts, and the threaded column 2 passes through the fixed plate 21 and is screwed to the fixed plate 21. A handle 10 is fixed at the lower end of the threaded column 2; sliders 401 are fixed on both sides of the lower end of the sealing block 4, and both ends of the embedded groove 301 are connected to each other and provided with slide grooves 302, and the slider 401 is clamped in the corresponding slide groove 302; a raised portion 402 is provided at the upper end of the sealing block 4, and the raised portion 402 is clamped in the center hole 701; a sealing groove 5 is provided at the position of the fixed column 3 of the valve body 1 01, a sealing ring 22 is embedded in the sealing groove 501; a protrusion 601 is fixedly provided at the lower end of the gate plate 6, and the protrusion 601 is clamped in the center hole 701; a boss 14 is fixedly provided at a position corresponding to the center of the valve cavity 101 in the valve body 1, a top plate 13 is clamped on the boss 14, a sealing portion 15 is provided at the upper end of the top plate 13, the lower end of the valve stem 12 passes through the sealing portion 15 and the top plate 13, an inner ring groove 19 is provided at the connection between the valve cover 18 and the inner side of the valve body 1, an annular clamping portion 17 is provided at the position of the sealing portion 15 corresponding to the inner ring groove 19, the annular clamping portion 17 is clamped in the inner ring groove 19, and a sealing ring 16 is clamped at the lower end of the annular clamping portion 17.

[0032] Through the above arrangement, the sealing block 4, the high-elastic spring 23, the push plate 202 and the threaded column 2 of the utility model are arranged so that when the medium flows, the sealing block 4 can be squeezed toward the high-elastic spring 23, so that the center hole 701 is connected with the outflow area 104. At this time, the medium can enter the circulation channel 102 through the center hole 701 and the outflow area 104 for discharge. By driving the threaded column 2 to move inward, the push plate 202 is pushed toward the high-elastic spring 23 to change the pressure of the high-elastic spring 23, so that the distance that the medium pushes the sealing block 4 is changed, and the flow pressure is adjusted. According to the position of the scale line 201, the staff can accurately control the value of the flow pressure. In addition, the lower end of the sealing block 4 is clamped in the embedded groove 301, so that the sealing block 4 can only move up and down and will not be offset by the impact of the medium, so the flow pressure can be effectively adjusted. Section; The setting of the through groove 5 and the fixed plate 21 of the utility model allows the fixed column 3 to be taken out, which is convenient for subsequent maintenance and replacement; the setting of the slider 401 and the slide groove 302 of the utility model allows the sealing block 4 to only move up and down without any offset; the setting of the raised portion 402 of the utility model strengthens the sealing performance between the sealing block 4 and the center hole 701, which can effectively prevent medium leakage; the setting of the sealing ring 22 of the utility model strengthens the sealing performance between the valve body 1 and the fixed column 3, which can effectively prevent medium leakage; the setting of the raised portion 601 of the utility model strengthens the sealing performance between the gate plate 6 and the center hole 701, which can effectively prevent medium leakage; the setting of the sealing portion 15 and the top plate 13 of the utility model increases the sealing performance between the valve stem 12 and the valve body 1 and the valve cover 18, which can effectively prevent medium leakage.

[0033] Working principle: When the gate valve is started, the valve stem 12 is moved upward by controlling the control hand wheel device 20, thereby driving the gate plate 6 to move upward, so that the protrusion 601 of the gate plate 6 leaves the center hole 701. At this time, the medium can enter the inlet 9 through the circulation channel 102 and then enter the inlet area 103, and then pass through the center hole 701 to impact the sealing block 4, squeezing the sealing block 4 to move toward the high elastic spring 23, so that the protrusion 402 of the sealing block 4 leaves the center hole 701. At this time, the medium can enter the outflow area 104 and circulate through the outlet 11. When the flow pressure of the gate valve needs to be adjusted, it can be The handle 10 is rotated as needed to drive the threaded column 2 to rotate, and the scale line 201 is observed to screw the threaded column 2 into a certain position. At this time, the threaded column 2 drives the push plate 202 to move upward to squeeze the high-elastic spring 23, so that the pressure of the high-elastic spring 23 on the sealing block 4 increases. At this time, the impact force of the medium will reduce the distance that the sealing block 4 moves downward, thereby adjusting the flow rate of the medium. The basic structure of the gate valve of the utility model and the principle of controlling the handwheel device 20, the high-elastic spring 23, the valve core and the valve stem 12 are all disclosed in the prior art, so this application will not go into too much detail.

[0034] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A pressure regulating gate valve, comprising a valve body (1), a valve cover (18), a valve stem (12) penetrating the valve cover (18) and reaching the inside of the valve body (1), a gate plate (6) connected to the lower end of the valve stem (12), and a control hand wheel device (20) for regulating the lifting and lowering of the valve stem (12), wherein the valve body (1) is provided with a communicating flow channel (102), and the upper end of the flow channel (102) is communicated with a valve cavity (101), and the characteristics are as follows: Sealing plates (8) are fixedly provided on both sides of the center of the circulation channel (102), a center plate (7) is fixedly provided between the sealing plates (8), and the center plate (7) divides the sealing plates (8) into an inflow area (103) and an outflow area (104). An inflow port (9) is provided on one side of the sealing plate (8) at a position corresponding to the inflow area (103), and an outflow port (11) is provided on the other side of the sealing plate (8) at a position corresponding to the outflow area (104). The gate plate (6) is provided in the inflow area (103), and a center hole (701) is provided in the center of the center plate (7). 104) is provided with a pressure regulating structure, the pressure regulating structure comprising a fixed column (3), the upper end of the fixed column (3) is provided with an embedded groove (301), a sealing block (4) is embedded in the embedded groove (301), the upper end of the sealing block (4) is abutted against the central hole (701), the lower end of the sealing block (4) is provided with a push plate (202), a high elastic spring (23) is fixed between the push plate (202) and the sealing block (4), the lower end of the push plate (202) is rotatably connected with a threaded column (2), the threaded column (2) extends to the outside of the valve body (1), and the upper end of the threaded column (2) is provided with a scale line (201).

2. A pressure regulating gate valve according to claim 1, characterized in that: A through groove (5) is provided at the lower end of the valve body (1) at a position corresponding to the fixing column (3), and the lower end of the fixing column (3) is clamped in the through groove (5). A fixing plate (21) is fixed to the lower end of the valve body (1) by bolts, and the threaded column (2) passes through the fixing plate (21) and is screwed to the fixing plate (21), and a handle (10) is fixed to the lower end of the threaded column (2).

3. A pressure regulating gate valve according to claim 2, characterized in that: Slide blocks (401) are fixedly provided on both sides of the lower end of the sealing block (4), and slide grooves (302) are provided at both ends of the embedded groove (301), and the slide blocks (401) are clamped in the corresponding slide grooves (302).

4. A pressure regulating gate valve according to claim 3, characterized in that: The upper end of the sealing block (4) is provided with a protruding portion 1 (402), and the protruding portion 1 (402) is clamped in the central hole (701).

5. A pressure regulating gate valve according to claim 4, characterized in that: The valve body (1) is provided with a sealing groove (501) at a position corresponding to the fixing column (3), and a sealing ring (22) is embedded in the sealing groove (501).

6. A pressure regulating gate valve according to claim 1, characterized in that: A second protrusion (601) is fixedly provided at the lower end of the gate plate (6), and the second protrusion (601) is clamped in the center hole (701).

7. A pressure regulating gate valve according to claim 6, characterized in that: A boss (14) is fixedly provided in the valve body (1) at a position corresponding to the center of the valve cavity (101); a top plate (13) is clamped on the boss (14); a sealing portion (15) is provided at the upper end of the top plate (13); the lower end of the valve stem (12) passes through the sealing portion (15) and the top plate (13); an inner ring groove (19) is provided at the connection between the valve cover (18) and the inner side of the valve body (1); an annular clamping portion (17) is provided at a position of the sealing portion (15) corresponding to the inner ring groove (19); the annular clamping portion (17) is clamped in the inner ring groove (19); and a second sealing ring (16) is clamped at the lower end of the annular clamping portion (17).

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