High-pressure gate valve with pressure relief and explosion prevention functions

Abstract

The invention relates to the technical field of high-pressure gate valves, in particular to a high-pressure gate valve with pressure relief and explosion prevention functions, which comprises a valve body, a valve cover is fixed at the top of the valve body through a bolt, a first internal thread bushing is welded at the top of the valve cover, and a screw rod is sleeved in the first internal thread bushing in a penetrating manner; the bottom end, located in the valve body, of the lead screw is connected with a valve element through a bearing, a discharging pipe is welded to one side of the valve body, and a pressure relief assembly is arranged at the top of the discharging pipe. The pressure relief assembly comprises a sleeve arranged at the top of the discharging pipe, and a second inner threaded sleeve is welded to the top of the sleeve; a circular sealing plate in the sleeve is pushed by a second spring to move downwards to be tightly attached to the top of the external thread tooth connecting pipe, when the pressure in the valve body and the pressure in the discharging pipe are large, the circular sealing plate is pushed to move upwards, when the circular sealing plate is higher than the pressure relief pipe, a medium flowing into the sleeve through the external thread tooth connecting pipe is discharged out of the pressure relief pipe, and the pressure relief purpose is achieved. The conditions of leakage, explosion and the like of the valve body are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure gate valves, and in particular to a high-pressure gate valve with pressure relief and explosion-proof functions. Background Art

[0002] A high-pressure gate valve is a pipeline device used to control the flow of high-pressure fluids (such as water, gas, steam, oil, etc.). It is usually used in situations where frequent operation and complete fluid cutoff are required. The main working principle of the gate valve is to open and close the fluid by raising and lowering the gate plate (or valve disc) in the valve body.

[0003] The existing high-pressure gate valve does not have a pressure relief and explosion-proof function. When the internal pressure is greater than the bearing capacity of the gate valve, leakage, explosion, etc. will occur. Therefore, a high-pressure gate valve with a pressure relief and explosion-proof function is proposed. The second spring pushes the circular sealing plate downward to seal the top of the external threaded tooth connecting pipe. When the pressure in the valve body and the discharge pipe is large, the circular sealing plate is pushed up and pressure is pressed down from the pressure relief pipe. Summary of the invention

[0004] In response to the problems in the prior art, the present invention provides a high-pressure gate valve with pressure relief and explosion-proof functions. The second spring pushes the circular sealing plate downward to seal the top of the external threaded tooth connecting pipe. When the pressure in the valve body and the discharge pipe is high, the circular sealing plate is pushed upward and pressed downward from the pressure relief pipe.

[0005] The technical solution adopted by the present invention to solve its technical problem is a high-pressure gate valve with pressure relief and explosion-proof functions, including a valve body, a valve cover is fixed to the top of the valve body by bolts, a first internal threaded sleeve is welded to the top of the valve cover, a screw rod is inserted through the inside of the first internal threaded sleeve, the bottom end of the screw rod located inside the valve body is connected to the valve core through a bearing, a discharge pipe is welded to one side of the valve body, and a pressure relief component is arranged on the top of the discharge pipe;

[0006] The pressure relief assembly includes a sleeve arranged at the top of the discharge pipe, a second internally threaded sleeve is welded on the top of the sleeve, a long screw is inserted through the inside of the second internally threaded sleeve, the bottom end of the long screw located inside the sleeve is connected to a circular layer plate through a bearing, a circular sealing plate is arranged at the bottom of the circular layer plate, and a second spring is fixed between the circular sealing plate and the circular layer plate by bolts.

[0007] By adopting the above technical solution, the rotating screw pushes the gate core down into the valve body through the first internal threaded sleeve to block the medium in the valve body. The second spring pushes the circular sealing plate down to prevent the medium in the discharge pipe from entering the sleeve. When the pressure in the valve body and the discharge pipe is high, the medium flows into the sleeve and is discharged.

[0008] Specifically, an externally threaded connecting pipe is welded at the bottom of the sleeve, the externally threaded connecting pipe is connected to the top of the discharge pipe through a thread groove, and a filter screen is fixed inside the externally threaded connecting pipe by bolts.

[0009] Specifically, a pressure relief pipe is welded on one side of the sleeve, and a limiting ring is welded on the inner side of the sleeve located at the bottom of the circular layer plate.

[0010] Specifically, a rocker plate is fixed to the top of the screw rod via a flat key, and a sealing ring is glued to the bottom of the valve cover.

[0011] Specifically, a limiting assembly is provided at the top of the valve cover on one side of the first internal threaded sleeve, and the limiting assembly includes a pipe sleeve fixed to the top of the valve cover through a flange, a compression spring is provided inside the pipe sleeve, and a telescopic rod is provided at the top end of the pipe sleeve.

[0012] Specifically, the bottom end of the telescopic rod located inside the pipe sleeve is fixed with a limit block by bolts, a reserved groove is opened on one side of the pipe sleeve, and an operating rod is connected to one side of the telescopic rod through a threaded groove, and the operating rod passes through the reserved groove.

[0013] Beneficial effects of the present invention:

[0014] (1) In the high-pressure gate valve with pressure relief and explosion-proof functions described in the present invention, the circular sealing plate in the casing is pushed down by the second spring and pressed against the top of the external threaded tooth connecting pipe. When the medium flows out through the discharge pipe, it will not flow into the casing through the external threaded tooth connecting pipe. When the pressure in the valve body and the discharge pipe is relatively high, the circular sealing plate is pushed up. When the circular sealing plate is higher than the pressure relief pipe, the medium that flows into the casing through the external threaded tooth connecting pipe is discharged from the pressure relief pipe, thereby achieving the purpose of pressure relief and avoiding leakage and explosion of the valve body.

[0015] (2) In the high-pressure gate valve with pressure relief and explosion-proof functions described in the present invention, the compression spring in the pipe sleeve pushes the telescopic rod upward through the limit block. The telescopic rod runs through the rocker and can be limited to prevent the rocker from rotating due to friction, accidental touch, etc. When the rocker needs to be rotated, the operator holds the operating lever to move the telescopic rod downward to rotate the rocker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the valve body and valve cover structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the pressure relief assembly of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0021] In the figure: 1. valve body; 2. valve cover; 3. discharge pipe; 4. pressure relief assembly; 401. sleeve; 402. second internal thread sleeve; 403. long screw; 404. circular layer plate; 405. second spring; 406. circular sealing plate; 407. limit ring; 408. external threaded connecting pipe; 409. filter screen; 410. pressure relief pipe; 5. pressure gauge; 6. limit assembly; 601. sleeve; 602. telescopic rod; 603. compression spring; 604. limit block; 605. reserved groove; 606. operating rod; 7. first internal thread sleeve; 8. screw rod; 9. gate core; 10. feed pipe; 11. rocker; 12. sealing ring. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] The second spring pushes the circular sealing plate downward to seal the top of the external threaded connection pipe. When the pressure in the valve body and the discharge pipe is high, the circular sealing plate is pushed upward and pressed down from the pressure relief pipe. Figure 1-4 As shown, the high-pressure gate valve with pressure relief and explosion-proof functions of the present invention comprises a valve body 1, a valve cover 2 is fixed to the top of the valve body 1 by bolts, a first internal threaded sleeve 7 is welded to the top of the valve cover 2, a screw rod 8 is inserted through the inside of the first internal threaded sleeve 7, and the bottom end of the screw rod 8 located inside the valve body 1 is connected to a valve core 9 through a bearing, a discharge pipe 3 is welded to one side of the valve body 1, and a pressure relief assembly 4 is arranged on the top of the discharge pipe 3;

[0024] The pressure relief assembly 4 includes a sleeve 401 arranged at the top of the discharge pipe 3, a second internal threaded sleeve 402 is welded on the top of the sleeve 401, a long screw 403 is inserted through the inside of the second internal threaded sleeve 402, the bottom end of the long screw 403 located inside the sleeve 401 is connected to a circular layer plate 404 through a bearing, a circular sealing plate 406 is arranged at the bottom of the circular layer plate 404, and a second spring 405 is fixed between the circular sealing plate 406 and the circular layer plate 404 by bolts.

[0025] When in use, the rotating screw 8 pushes the gate core 9 downward into the valve body 1 through the first internal threaded sleeve 7 to block the medium in the valve body 1. The second spring 405 pushes the circular sealing plate 406 downward to prevent the medium in the discharge pipe 3 from entering the sleeve 401. When the pressure in the valve body 1 and the discharge pipe 3 is relatively high, the medium flows into the sleeve 401 and is discharged.

[0026] For example, Figure 3As shown, the present invention also includes that an externally threaded connecting tube 408 is welded at the bottom of the sleeve 401, the externally threaded connecting tube 408 is connected to the top of the discharge pipe 3 through a thread groove, and a filter screen 409 is fixed inside the externally threaded connecting tube 408 by bolts.

[0027] When in use, the sleeve 401 is connected to the top of the discharge pipe 3 through the external threaded connecting pipe 408 and the threaded groove. The filter screen 409 can filter the medium flowing into the sleeve 401 to prevent impurities and the like from entering the sleeve 401.

[0028] For example, Figure 3 As shown, the present invention further includes that a pressure relief pipe 410 is welded to one side of the sleeve 401 , and a limiting ring 407 is welded to the inner side of the sleeve 401 located at the bottom of the circular layer plate 404 .

[0029] When in use, the medium flowing into the sleeve 401 is discharged through the pressure relief pipe 410 , and the limiting ring 407 is provided to limit the circular layer plate 404 .

[0030] For example, Figure 2 As shown, the present invention also includes that a rocker plate 11 is fixed to the top of the screw rod 8 via a flat key, and a sealing ring 12 is glued to the bottom of the valve cover 2.

[0031] When in use, the setting of the rocker 11 facilitates personnel to rotate the screw rod 8 , and the sealing ring 12 is used to seal between the valve cover 2 and the valve body 1 .

[0032] For example, Figure 4 As shown, the present invention also includes that a limiting assembly 6 is provided at the top of the valve cover 2 on one side of the first internal threaded sleeve 7, and the limiting assembly 6 includes a pipe sleeve 601 fixed to the top of the valve cover 2 through a flange, a compression spring 603 is provided inside the pipe sleeve 601, and a telescopic rod 602 is provided at the top of the pipe sleeve 601.

[0033] When in use, the compression spring 603 pushes the telescopic rod 602 to move upward.

[0034] For example, Figure 4 As shown, the present invention also includes that the bottom end of the telescopic rod 602 located inside the pipe sleeve 601 is fixed with a limit block 604 by bolts, a reserved groove 605 is opened on one side of the pipe sleeve 601, and an operating rod 606 is connected to one side of the telescopic rod 602 through a threaded groove, and the operating rod 606 passes through the reserved groove 605.

[0035] When in use, the limit block 604 can prevent the telescopic rod 602 from falling out of the pipe sleeve 601. A person holding the operating rod 606 can move the telescopic rod 602 up and down. The opening of the reserved groove 605 ensures that the pipe sleeve 601 will not affect the up and down movement of the operating rod 606.

[0036] When the present invention is in use, the medium flows into the valve body 1 through the feed pipe 10 and flows out through the discharge pipe 3. A person holds the shaking plate 11 to rotate the screw rod 8, and the screw rod 8 rotates through the first internal thread sleeve 7 to push the valve core 9 downward. The gate core 9 moves downward and is inserted into the valve body 1 to cut off the medium flowing into the valve body 1 through the feed pipe 10;

[0037] The circular sealing plate 406 in the sleeve 401 is pushed down by the second spring 405 and is pressed against the top of the external threaded tooth connection pipe 408. When the medium flows out through the discharge pipe 3, it will not flow into the sleeve 401 through the external threaded tooth connection pipe 408. When the pressure in the valve body 1 and the discharge pipe 3 is relatively high, the circular sealing plate 406 is pushed upward. When the circular sealing plate 406 is higher than the pressure relief pipe 410, the medium that flows into the sleeve 401 through the external threaded tooth connection pipe 408 is discharged from the pressure relief pipe 410, thereby achieving the purpose of pressure relief and avoiding leakage and explosion of the valve body 1.

[0038] The personnel rotate the long screw 403 to push the circular layer plate 404 downward through the second internal threaded sleeve 402, and squeeze the second spring 405, so as to adjust the pressure applied by the second spring 405 on the circular sealing plate 406, thereby adjusting the pressure relief pressure. The setting of the limiting ring 407 is used to limit the circular layer plate 404, to prevent the circular layer plate 404 from moving downward to the side of the pressure relief pipe 410, so as to avoid affecting the upward movement and pressure relief of the circular sealing plate 406;

[0039] The compression spring 603 in the pipe sleeve 601 pushes the telescopic rod 602 upward through the limit block 604. The telescopic rod 602 passes through the rocking plate 11 and can be limited to prevent the rocking plate 11 from rotating due to friction, accidental touch, etc. When the rocking plate 11 needs to be rotated, the person holds the operating lever 606 to move the telescopic rod 602 downward to rotate the rocking plate 11.

[0040] The above shows and describes 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 above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. High-pressure gate valve with pressure relief and explosion-proof function, characterized in that: The valve body (1) comprises a valve cover (2) fixed to the top of the valve body (1) by bolts, a first internal thread sleeve (7) welded to the top of the valve cover (2), a screw rod (8) running through the inside of the first internal thread sleeve (7), the bottom end of the screw rod (8) located inside the valve body (1) is connected to a valve core (9) via a bearing, a discharge pipe (3) is welded to one side of the valve body (1), and a pressure relief assembly (4) is arranged on the top of the discharge pipe (3); The pressure relief assembly (4) comprises a sleeve (401) arranged at the top of the discharge pipe (3), a second internally threaded sleeve (402) is welded on the top of the sleeve (401), a long screw (403) is inserted through the inside of the second internally threaded sleeve (402), the bottom end of the long screw (403) located inside the sleeve (401) is connected to a circular layer plate (404) through a bearing, a circular sealing plate (406) is arranged at the bottom of the circular layer plate (404), and a second spring (405) is fixed between the circular sealing plate (406) and the circular layer plate (404) by bolts.

2. The high-pressure gate valve with pressure relief and explosion-proof function according to claim 1 is characterized in that: An externally threaded connecting pipe (408) is welded to the bottom of the sleeve (401), and the externally threaded connecting pipe (408) is connected to the top of the discharge pipe (3) via a thread groove. A filter screen (409) is fixed inside the externally threaded connecting pipe (408) via bolts.

3. The high-pressure gate valve with pressure relief and explosion-proof function according to claim 1 is characterized in that: A pressure relief pipe (410) is welded to one side of the sleeve (401), and a limiting ring (407) is welded to the inner side of the sleeve (401) located at the bottom of the circular layer plate (404).

4. The high-pressure gate valve with pressure relief and explosion-proof function according to claim 1 is characterized in that: A feed pipe (10) is welded to the side of the valve body (1) away from the discharge pipe (3), and a pressure gauge (5) is connected to the top of the discharge pipe (3) located on one side of the sleeve (401) through a threaded groove.

5. The high-pressure gate valve with pressure relief and explosion-proof function according to claim 1 is characterized in that: A rocker plate (11) is fixed to the top of the screw rod (8) via a flat key, and a sealing ring (12) is glued to the bottom of the valve cover (2).

6. The high-pressure gate valve with pressure relief and explosion-proof function according to claim 1 is characterized in that: A limit assembly (6) is provided at the top of the valve cover (2) on one side of the first internally threaded sleeve (7), and the limit assembly (6) comprises a pipe sleeve (601) fixed to the top of the valve cover (2) via a flange, a compression spring (603) is provided inside the pipe sleeve (601), and a telescopic rod (602) is sleeved on the top of the pipe sleeve (601).

7. The high-pressure gate valve with pressure relief and explosion-proof function according to claim 6 is characterized in that: The bottom end of the telescopic rod (602) located inside the pipe sleeve (601) is fixed to a limit block (604) by means of bolts, a reserved groove (605) is provided on one side of the pipe sleeve (601), an operating rod (606) is connected to one side of the telescopic rod (602) via a threaded groove, and the operating rod (606) passes through the reserved groove (605).

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