Combination valve

Abstract

The utility model relates to the technical field of valves, and discloses a combination valve which comprises a connecting pipe, an air inlet pipe is arranged at the bottom of the connecting pipe in a communicated mode, a sleeve is arranged at the top of the connecting pipe in a communicated mode, an air outlet pipe is arranged at the top of the sleeve in a communicated mode, and a pressure relief mechanism is fixedly installed in the sleeve. The pressure relief mechanism comprises a sealing cylinder, a mounting plate is fixedly mounted on the outer wall of the sealing cylinder, the mounting plate is fixedly mounted on the inner wall of the sleeve, a lifting column is slidably arranged on the inner wall of the sealing cylinder, a first pressing plate is fixedly mounted at the bottom end of the lifting column, and a rectangular rod moves upwards or downwards by rotating a lead screw; according to the pressure relief device, the first spring is driven to move upwards or downwards to drive the pushing plate to move upwards or downwards, so that the pushing plate compresses the first spring to different degrees, the force of the first spring pressing the first pressing plate is changed, the set pressure relief pressure threshold value is adjusted, the first spring can be protected through the sealing cylinder, and the first spring is prevented from being eroded by corrosive fluid.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a combination valve. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. However, the existing valves have relatively simple functions, do not have the effects of check and pressure relief, and have relatively single functions.

[0003] The existing Chinese patent CN217898905U discloses a combination valve. When the pressure inside the connecting pipe is too high, the pressure pushes the second sealing plate to move upward along the trajectory of the limit rod, and the second spring is squeezed and deformed, and the pressure is discharged through the air inlet and the sleeve and then through the exhaust hole. When the pressure inside the connecting pipe is stable, the second sealing plate can be pushed to reset through the elastic action of the second spring, thereby sealing the air inlet.

[0004] The above-mentioned combination valve mainly relies on the elastic action of the second spring to reset after pressure relief and control the pressure threshold of minimum pressure relief. However, due to the inconvenience of fixing the distance between the top of the second spring and the inner wall of the top of the sleeve, it is impossible to adjust the pressure threshold of minimum pressure relief. When sufficient pressure is required in the connecting pipeline to transport the fluid medium, the transportation requirements of the fluid medium cannot be met due to the pressure relief structure. Summary of the invention

[0005] The purpose of the utility model is to provide a combination valve to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a combination valve, comprising a connecting pipe, the bottom of the connecting pipe is connected to an air inlet pipe, the top of the connecting pipe is connected to a sleeve, the top of the sleeve is connected to an air outlet pipe, and a pressure relief mechanism is fixedly installed inside the sleeve;

[0007] The pressure relief mechanism comprises a sealing cylinder, a mounting plate is fixedly mounted on the outer wall of the sealing cylinder, the mounting plate is fixedly mounted on the inner wall of the sleeve, a lifting column is slidably arranged on the inner wall of the sealing cylinder, a pressure plate 1 is fixedly mounted on the bottom end of the lifting column, the pressure plate 1 presses on the bottom end port of the sleeve, a spring 1 is fixedly mounted on the top of the lifting column, a push plate is fixedly mounted on the top end of the spring 1, a sealing sleeve is fixedly mounted on the top of the sealing cylinder, a rectangular rod is slidably arranged on the inner wall of the sealing sleeve, the bottom end of the rectangular rod is fixedly connected to the top of the push plate, a screw rod is threadedly connected to the inner wall of the rectangular rod, and the top end of the screw rod passes through the top of the sleeve through a bearing;

[0008] A non-return component is arranged inside the air intake pipe.

[0009] Furthermore, a sealing gasket 1 is fixedly installed on the inner wall of the bottom end of the sleeve, and the upper surface of the sealing gasket 1 contacts the lower surface of the pressure plate 1. A sealing ring 1 is fixedly sleeved on the outer wall of the top end of the lifting column, and the outer side surface of the sealing ring 1 contacts the inner wall of the sealing cylinder.

[0010] Furthermore, an air hole is provided on the top of the push plate, and a voltage-stabilizing tube is provided on the side of the sealing tube, and the right end of the voltage-stabilizing tube extends out of the sleeve.

[0011] Furthermore, a turning handle is fixedly mounted on the top end of the screw rod, and an anti-slip groove is provided on the edge of the turning handle.

[0012] Furthermore, the non-return component includes a connecting sleeve, which is fixedly installed on the inner wall of the intake pipe, a second pressure plate is placed on the top of the connecting sleeve, a telescopic rod is fixedly installed on the bottom of the second pressure plate, the bottom end of the telescopic rod is fixedly connected to the outer wall of the connecting sleeve, and the top of the connecting sleeve and the bottom of the second pressure plate are elastically connected by a second spring.

[0013] Furthermore, a sealing gasket 2 is fixedly installed on the top of the connecting sleeve, the upper surface of the sealing gasket 2 contacts the bottom of the pressing plate 2, a separating sleeve is fixedly installed on the outer wall of the connecting sleeve, a protective sleeve is fixedly installed on the bottom of the pressing plate 2, the separating sleeve is arranged on the protective sleeve, a sealing ring 2 is fixedly installed on the top inner wall of the separating sleeve, and the inner side surface of the sealing ring 2 is pressed on the outer wall of the protective sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] By rotating the screw rod, the rectangular rod is moved up or down, thereby driving the push plate to move up or down, so that the push plate compresses the spring 1 to different degrees, thereby changing the force of the spring 1 pressing on the pressure plate 1, thereby adjusting the set pressure relief pressure threshold, and the sealing cylinder can protect the spring 1 to prevent the corrosive fluid from corroding the spring 1;

[0016] A separation sleeve and a protective sleeve are provided to protect the second spring to prevent the second spring from being corroded after the flow contacts the second spring. A sealing gasket is provided to prevent the fluid from entering the protective sleeve from the gap between the separation sleeve and the protective sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a structural schematic diagram of a front cross-sectional view of the connecting pipe of the utility model;

[0019] Figure 3It is a structural schematic diagram of an exploded view of the pressure relief mechanism of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the pressure relief mechanism of the utility model;

[0021] Figure 5 It is a structural schematic diagram of a front cross-sectional view of the non-return component of the utility model.

[0022] In the figure: 1. connecting pipe; 2. air inlet pipe; 3. sleeve; 4. air outlet pipe; 5. pressure relief mechanism; 501. sealing cylinder; 502. lifting column; 503. pressure plate 1; 504. spring 1; 505. push plate; 506. mounting plate; 507. screw rod; 508. rectangular rod; 509. sealing sleeve; 6. sealing gasket 1; 7. sealing ring 1; 8. voltage-stabilizing tube; 9. turning handle; 10. non-return component; 1001. connecting sleeve; 1002. pressure plate 2; 1003. telescopic rod; 1004. spring 2; 11. separation sleeve; 12. sealing ring 2; 13. sealing gasket 2; 14. protective sleeve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a combined valve, comprising a connecting pipe 1, the bottom of the connecting pipe 1 is connected to an air inlet pipe 2, the top of the connecting pipe 1 is connected to a sleeve 3, the top of the sleeve 3 is connected to an air outlet pipe 4, and a pressure relief mechanism 5 is fixedly installed inside the sleeve 3;

[0025] The pressure relief mechanism 5 includes a sealing cylinder 501, the outer wall of which is fixedly provided with a mounting plate 506, which is fixedly provided on the inner wall of the sleeve 3, a lifting column 502 is slidably provided on the inner wall of the sealing cylinder 501, a pressing plate 503 is fixedly provided on the bottom end of the lifting column 502, which presses on the bottom end port of the sleeve 3, a spring 504 is fixedly provided on the top of the lifting column 502, a pushing plate 505 is fixedly provided on the top of the spring 504, a sealing sleeve 509 is fixedly provided on the top of the sealing cylinder 501, a rectangular rod 508 is slidably provided on the inner wall of the sealing sleeve 509, the bottom end of the rectangular rod 508 is fixedly connected to the top of the pushing plate 505, a screw rod 507 is threadedly connected to the inner wall of the rectangular rod 508, the top end of the screw rod 507 passes through the top of the sleeve 3 through a bearing, and when the fluid pressure in the connecting pipe 1 exceeds the setting pressure, the pressure relief mechanism 5 includes a sealing sleeve 509, a sealing sleeve 509 is fixedly provided on the top of the sealing sleeve 509, a rectangular rod 508 is slidably provided on the inner wall of the sealing sleeve 509, the bottom end of the rectangular rod 508 is fixedly connected to the top of the pushing plate 505, a screw rod 507 is threadedly provided on the inner wall of the rectangular rod 508, and the top end of the screw rod 507 passes through the top of the sleeve 3 through a bearing. When the pressure range is set, the pressure plate 503 is pushed upward by the fluid, thereby driving the lifting column 502 to move upward. The lifting column 502 moves upward to squeeze the spring 504, and the fluid enters the sleeve 3 and is then discharged from the air outlet pipe 4 to maintain the pressure in the connecting pipe 1 within the set range. The rectangular rod 508 is moved upward or downward by rotating the screw rod 507, thereby driving the push plate 505 to move upward or downward, so that the push plate 505 compresses the spring 504 to different degrees, thereby changing the force of the spring 504 pressing on the pressure plate 503, and realizing the adjustment of the set pressure relief pressure threshold. The sealing cylinder 501 can protect the spring 504 to prevent the corrosive fluid from corroding the spring 504. The sealing sleeve 509 is provided to prevent the fluid from entering the sealing cylinder 501 from the gap between the rectangular rod 508 and the sealing cylinder 501.

[0026] A check component 10 is provided inside the air intake pipe 2. The check component 10 includes a connecting sleeve 1001. The connecting sleeve 1001 is fixedly mounted on the inner wall of the air intake pipe 2. A second pressing plate 1002 is placed on the top of the connecting sleeve 1001. A telescopic rod 1003 is fixedly mounted on the bottom of the second pressing plate 1002. The bottom end of the telescopic rod 1003 is fixedly connected to the outer wall of the connecting sleeve 1001. The top of the connecting sleeve 1001 and the bottom of the second pressing plate 1002 are elastically connected by a second spring 1004. When the fluid enters from the air intake pipe 2, the fluid pushes the second pressing plate 1002 open and enters the connecting pipe 1. When the external fluid pressure is less than the fluid pressure in the connecting pipe 1, the second spring 1004 pulls the second pressing plate 1002 downward to re-block the top of the connecting sleeve 1001 to prevent the fluid in the connecting pipe 1 from flowing out.

[0027] A sealing gasket 6 is fixedly installed on the inner wall of the bottom end of the sleeve 3, and the upper surface of the sealing gasket 6 contacts the lower surface of the pressing plate 503. A sealing ring 7 is fixedly sleeved on the outer wall of the top end of the lifting column 502, and the outer side surface of the sealing ring 7 contacts the inner wall of the sealing cylinder 501. The sealing ring 7 is provided to prevent the fluid from entering the upper part of the lifting column 502 from the gap between the lifting column 502 and the sealing cylinder 501;

[0028] An air hole is provided on the top of the push plate 505, and a voltage-stabilizing tube 8 is provided on the side of the sealing cylinder 501. The right end of the voltage-stabilizing tube 8 extends out of the sleeve 3. The air hole and the voltage-stabilizing tube 8 are provided to stabilize the air pressure in the sealing cylinder 501.

[0029] A turning handle 9 is fixedly mounted on the top of the screw rod 507, and an anti-slip groove is provided on the edge of the turning handle 9, so that the hand is not easy to slip when the screw rod 507 is turned;

[0030] A sealing gasket 13 is fixedly installed on the top of the connecting sleeve 1001, and the upper surface of the sealing gasket 13 contacts the bottom of the pressure plate 1002. A separation sleeve 11 is fixedly installed on the outer wall of the connecting sleeve 1001, and a protective sleeve 14 is fixedly installed on the bottom of the pressure plate 1002. The separation sleeve 11 is sleeved on the protective sleeve 14, and a sealing ring 12 is fixedly installed on the top inner wall of the separation sleeve 11, and the inner side surface of the sealing ring 12 is pressed on the outer wall of the protective sleeve 14. The separation sleeve 11 and the protective sleeve 14 are provided to protect the spring 1004 to prevent the spring 1004 from being eroded after the flow contacts the spring 1004. The sealing gasket 13 is provided to prevent the fluid from entering the protective sleeve 14 from the gap between the separation sleeve 11 and the protective sleeve 14.

[0031] Working principle: When in use, the rectangular rod 508 is moved up or down by rotating the screw rod 507, thereby driving the push plate 505 to move up or down, so that the push plate 505 compresses the spring 1 504 to different degrees, thereby changing the force of the spring 1 504 pressing on the pressure plate 1 503, thereby adjusting the set pressure relief pressure threshold. When the fluid pressure in the connecting pipe 1 exceeds the set range, the pressure plate 1 503 is pushed up by the fluid, thereby driving the lifting column 502 to move up. The lifting column 502 moves up to squeeze the spring 1 504, and the fluid enters the sleeve 3 and is then discharged from the air outlet pipe 4 to maintain the pressure in the connecting pipe 1 within the set range.

[0032] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A combination valve, comprising a connecting pipe (1), wherein the bottom of the connecting pipe (1) is connected to an air inlet pipe (2), the top of the connecting pipe (1) is connected to a sleeve (3), and the top of the sleeve (3) is connected to an air outlet pipe (4), characterized in that: A pressure relief mechanism (5) is fixedly installed inside the sleeve (3); The pressure relief mechanism (5) comprises a sealing cylinder (501), a mounting plate (506) is fixedly mounted on the outer wall of the sealing cylinder (501), the mounting plate (506) is fixedly mounted on the inner wall of the sleeve (3), a lifting column (502) is slidably mounted on the inner wall of the sealing cylinder (501), a pressing plate (503) is fixedly mounted on the bottom end of the lifting column (502), the pressing plate (503) is pressed on the bottom end port of the sleeve (3), and a spring (506) is fixedly mounted on the top of the lifting column (502). (504), a push plate (505) is fixedly installed on the top of the spring 1 (504), a sealing sleeve (509) is fixedly installed on the top of the sealing cylinder (501), a rectangular rod (508) is slidably provided on the inner wall of the sealing sleeve (509), the bottom end of the rectangular rod (508) is fixedly connected to the top of the push plate (505), the inner wall of the rectangular rod (508) is threadedly connected to a screw rod (507), and the top end of the screw rod (507) passes through the top of the sleeve (3) through a bearing; A non-return component (10) is provided inside the air intake pipe (2).

2. A combination valve according to claim 1, characterized in that: A sealing gasket 1 (6) is fixedly mounted on the inner wall of the bottom end of the sleeve (3), and the upper surface of the sealing gasket 1 (6) contacts the lower surface of the pressing plate 1 (503). A sealing ring 1 (7) is fixedly sleeved on the outer wall of the top end of the lifting column (502), and the outer side surface of the sealing ring 1 (7) contacts the inner wall of the sealing cylinder (501).

3. A combination valve according to claim 1, characterized in that: An air hole is provided on the top of the push plate (505), and a voltage-stabilizing tube (8) is provided on the side of the sealing cylinder (501), wherein the right end of the voltage-stabilizing tube (8) extends outside the sleeve (3).

4. A combination valve according to claim 1, characterized in that: A turning handle (9) is fixedly mounted on the top end of the screw rod (507), and an anti-slip groove is provided on the edge of the turning handle (9).

5. A combination valve according to claim 1, characterized in that: The non-return component (10) comprises a connecting sleeve (1001), the connecting sleeve (1001) being fixedly mounted on the inner wall of the air intake pipe (2), a second pressing plate (1002) being placed on the top of the connecting sleeve (1001), a telescopic rod (1003) being fixedly mounted on the bottom of the second pressing plate (1002), the bottom end of the telescopic rod (1003) being fixedly connected to the outer wall of the connecting sleeve (1001), and a second spring (1004) being elastically connected between the top of the connecting sleeve (1001) and the bottom of the second pressing plate (1002).

6. A combination valve according to claim 5, characterized in that: A sealing gasket 2 (13) is fixedly mounted on the top of the connecting sleeve (1001), the upper surface of the sealing gasket 2 (13) contacts the bottom of the pressing plate 2 (1002), a separating sleeve (11) is fixedly mounted on the outer wall of the connecting sleeve (1001), a protective sleeve (14) is fixedly mounted on the bottom of the pressing plate 2 (1002), the separating sleeve (11) is sleeved on the protective sleeve (14), a sealing ring 2 (12) is fixedly mounted on the inner wall of the top of the separating sleeve (11), and the inner side surface of the sealing ring 2 (12) is pressed on the outer wall of the protective sleeve (14).

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