Adjustable safety valve and pressure adjusting method thereof

Abstract

The invention belongs to the technical field of safety valves, and discloses an adjustable safety valve and a pressure adjusting method thereof.The adjustable safety valve comprises a valve body, a valve element is slidably installed in the valve body, a guide sleeve is fixedly connected to the top end of the valve element, and the outer wall of the guide sleeve is sleeved with a first spring; a pressure relief pipe is fixedly connected to one side of the valve body, second pressure relief holes are evenly formed in the side, close to the valve body, of the pressure relief pipe in an annular array mode, a control panel is installed in the pressure relief pipe, first pressure relief holes are evenly formed in the inner wall of the control panel in an annular array mode, and the control panel is rotationally installed in the pressure relief pipe through an adjusting assembly. The adjusting assembly comprises a rack plate installed on one side of the control plate in a meshed mode, and the rack plate is installed in the valve body in a sliding mode through a driving assembly. When the medium pressure changes, the rack plate can be driven by the driving assembly to move, the rack plate moves to drive the control panel to rotate, the control panel rotates to drive the first pressure relief hole to gradually coincide with the second pressure relief hole, the area of the medium discharging channel is increased, and the system pressure change is adapted.

Description

Technical Field

[0001] The present invention belongs to the technical field of safety valves, and in particular relates to an adjustable safety valve and a pressure regulating method thereof. Background Art

[0002] Safety valves are key safety devices used in the industrial field to protect pressure vessels, piping systems and power equipment from overpressure damage. They are particularly suitable for industrial fields such as petrochemicals, power boilers, and pressure vessels. They are used to automatically release the medium when the system is overpressured to ensure the safe operation of the equipment. After searching, such as patent: CN222255173U, a safety valve with automatic pressure regulation includes a valve body, a sealing gasket is slidably connected inside the valve body, a pressure relief pipe is fixedly connected to the surface of the valve body, a pressure relief hole is provided inside the pressure relief pipe and on the surface of the valve body, the two pressure relief holes are in the same horizontal plane, the sealing gasket is movably fitted with the surface of the pressure relief hole, an air inlet is provided at the bottom of the valve body, the air inlet is connected to the pressure relief hole, a sliding groove is provided inside the valve body, the sealing gasket is slidably connected inside the sliding groove, a sealing gasket is provided, and the sealing gasket is used to seal the junction of the air inlet and the slide groove and the pressure relief hole through the setting of a spring. When the medium pressure is too high, the sealing gasket is impacted to move up, the position of the pressure relief hole is exposed, and the medium is discharged from the pressure relief hole through the pressure relief pipe to complete the pressure relief work without the need for human care and operation; Currently, when excessive pressure occurs, safety valves automatically release pressure by leveraging the medium's pressure to push the valve core upward, compressing the spring and opening the pressure relief hole. However, because the pressure relief hole is fixed in size, the amount of pressure relief cannot be adjusted in real time based on system pressure fluctuations. Consequently, fluctuations in medium pressure can result in over- or under-relief. Summary of the Invention

[0003] The object of the present invention is to provide an adjustable safety valve and a pressure regulation method thereof to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: an adjustable safety valve, comprising a valve body, a valve core slidably mounted inside the valve body, a guide sleeve fixedly connected to the top end of the valve core, and a first spring sleeved on the outer wall of the guide sleeve; A pressure relief pipe is fixedly connected to one side of the valve body, and second pressure relief holes are evenly arranged in an annular array on the side of the pressure relief pipe close to the valve body. A control plate is installed inside the pressure relief pipe, and the inner wall of the control plate is evenly arranged with first pressure relief holes in an annular array. The control plate is rotatably installed inside the pressure relief pipe through an adjustment assembly; The regulating assembly comprises a rack plate meshedly mounted on one side of the control plate, and the rack plate is slidably mounted inside the valve body through the driving assembly.

[0005] As a further technical solution of the present invention, the first pressure relief hole and the second pressure relief hole located at the center of the pressure relief pipe and the control panel always coincide with each other.

[0006] As a further technical solution of the present invention, the drive assembly includes a blade arranged inside the valve body, the inner wall of the blade is fixedly connected to a rotating shaft, the rotating shaft is rotatably mounted on the inner wall of the valve body, one end of the rotating shaft is fixedly connected to a first bevel gear, the top end of the first bevel gear is meshed and connected to a second bevel gear, the top end of the second bevel gear is fixedly mounted on a reciprocating screw, the outer wall of the reciprocating screw is threadedly connected to a piston rod, the top end of the piston rod is fixedly mounted on a piston, a pneumatic plate is provided above the piston, the piston and the pneumatic plate are both slidably mounted on the inside of a slide groove, the slide groove is opened inside the valve body, one side of the slide groove is connected to an air inlet pipe, the top end of the pneumatic plate is fixedly mounted on a connecting plate, and the connecting plate is fixedly mounted on the bottom end of the rack plate.

[0007] As a further technical solution of the present invention, a one-way valve is installed on the outer wall of the air intake pipe.

[0008] As a further technical solution of the present invention, an exhaust hole is provided on one side of the slide groove, and the exhaust hole is opened inside the valve body.

[0009] As a further technical solution of the present invention, the exhaust holes are evenly arranged.

[0010] As a further technical solution of the present invention, a second spring is provided on the top of the pneumatic plate, and the second spring is sleeved on the outer wall of the limiting shaft.

[0011] As a further technical solution of the present invention, an adjustment plate is provided on the top of the first spring, a threaded rod is fixedly installed on the top end of the adjustment plate, and the threaded rod is embedded in the inner wall of the valve body and threadedly connected.

[0012] As a further technical solution of the present invention, the adjustment plate is sleeved on the outer wall of the guide sleeve, and the two are slidably connected.

[0013] A pressure regulating method for an adjustable safety valve comprises the following steps: S1: Before working, first rotate the threaded rod to drive the adjustment plate to move up and down inside the valve body, and adjust the compression distance of the first spring to control the pressure relief pressure; S2: During operation, the blades are driven to rotate by the flow of the medium, and the rotation of the blades drives the rotation of the rotating shaft, and the rotation of the rotating shaft drives the rotation of the first bevel gear, and the rotation of the first bevel gear drives the rotation of the second bevel gear, and the rotation of the second bevel gear drives the rotation of the reciprocating screw, and the rotation of the reciprocating screw drives the piston rod to move back and forth, and the movement of the piston rod drives the piston to move back and forth inside the chute, and the external air is drawn into the chute through the air inlet pipe. When the air pressure inside the chute increases, the pneumatic plate is pushed up, and the movement of the pneumatic plate drives the movement of the limit shaft, and the movement of the limit shaft drives the movement of the connecting plate, thereby driving the rack plate to move up, and the movement of the rack plate drives the control plate to rotate. When the control plate rotates, the first pressure relief hole is driven to gradually coincide with the second pressure relief hole, thereby increasing the area of ​​the medium discharge channel; S3: The medium flowing inside the valve body pushes the valve core to move upward to expose the second pressure relief hole, and the medium is discharged from the second pressure relief hole and the first pressure relief hole to release pressure.

[0014] The beneficial effects of the present invention are as follows: The present invention adjusts the setting of the component. When the medium pressure changes during operation, the rack plate can be driven to move by the driving component. The movement of the rack plate drives the control plate to rotate. When the control plate rotates, the first pressure relief hole is driven to gradually coincide with the second pressure relief hole, thereby increasing the area of ​​the medium discharge channel and adapting to changes in system pressure.

[0015] The present invention is provided with a driving component. When working, the blades are driven to rotate by the flow of the medium. The rotation of the blades drives the rotation of the rotating shaft. The rotation of the rotating shaft drives the rotation of the first bevel gear. The rotation of the first bevel gear drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the reciprocating screw. The rotation of the reciprocating screw drives the piston rod to move back and forth. The movement of the piston rod drives the piston to move back and forth inside the slide groove. External air is drawn into the slide groove through the air intake pipe. When the air pressure inside the slide groove increases, the pneumatic plate is pushed up. The movement of the pneumatic plate drives the movement of the limit shaft. The movement of the limit shaft drives the movement of the connecting plate, thereby driving the rack plate to move up, thereby realizing automatic adjustment of the pressure relief port area.

[0016] The present invention moves the adjustment plate in the valve body. During operation, the adjustment plate can be driven to move by rotating the threaded rod, so that the adjustment plate moves up and down inside the valve body, and the compression distance of the first spring is adjusted to control the pressure relief pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic cross-sectional view of the valve body structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure at center A; Figure 5 This is a schematic diagram of the structure of the blade of the present invention; Figure 6 It is a structural schematic diagram of the control panel of the present invention.

[0018] In the figure: 1. Valve body; 2. Valve core; 3. Guide sleeve; 4. First spring; 5. Pressure relief pipe; 6. Blade; 7. Rotating shaft; 8. First bevel gear; 9. Second bevel gear; 10. Reciprocating screw; 11. Piston rod; 12. Piston; 13. Slide; 14. Inlet pipe; 15. One-way valve; 16. Pneumatic plate; 17. Limit shaft; 18. Connecting plate; 19. Rack plate; 20. Control plate; 21. First pressure relief hole; 22. Second pressure relief hole; 23. Exhaust hole; 24. Second spring; 25. Adjustment plate; 26. Threaded rod. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 6 As shown, in an embodiment of the present invention, an adjustable safety valve includes a valve body 1, a valve core 2 is slidably mounted inside the valve body 1, a guide sleeve 3 is fixedly connected to the top end of the valve core 2, and a first spring 4 is sleeved on the outer wall of the guide sleeve 3; A pressure relief pipe 5 is fixedly connected to one side of the valve body 1. Second pressure relief holes 22 are evenly arranged in an annular array on the side of the pressure relief pipe 5 close to the valve body 1. A control board 20 is installed inside the pressure relief pipe 5. The inner wall of the control board 20 has first pressure relief holes 21 evenly arranged in an annular array. The control board 20 is rotatably installed inside the pressure relief pipe 5 through an adjustment assembly. The regulating assembly includes a rack plate 19 meshingly mounted on one side of the control plate 20 , and the rack plate 19 is slidably mounted inside the valve body 1 through the driving assembly.

[0021] Existing: CN215628772U discloses a safety valve that automatically adjusts pressure. This patent discloses the valve body 1, pressure relief pipe 5 and blade 6 proposed in this application document. This technical means will not be described in detail here; The second pressure relief holes 22 and the control board 20 located inside the pressure relief pipe 5 and the control board 20 are initially staggered except for the second pressure relief holes 22 and the control board 20 at the center of the circle. During operation, when the medium pressure changes, the rack plate 19 can be driven to move by the driving component, and the movement of the rack plate 19 drives the control plate 20 to rotate. When the control plate 20 rotates, it drives the first pressure relief hole 21 to gradually overlap with the second pressure relief hole 22, thereby increasing the area of ​​the medium discharge channel and adapting to the system pressure changes.

[0022] like Figure 2 、 Figure 3 and Figure 6 As shown, the first pressure relief hole 21 and the second pressure relief hole 22 located at the center of the pressure relief pipe 5 and the control panel 20 always coincide with each other.

[0023] In the initial state, the medium inside the valve body 1 can be discharged from the first pressure relief hole 21 and the second pressure relief hole 22 located at the center of the pressure relief pipe 5 and the control plate 20.

[0024] like Figures 2 to 5 As shown, the drive assembly includes a blade 6 arranged inside the valve body 1, the inner wall of the blade 6 is fixedly connected with a rotating shaft 7, the rotating shaft 7 is rotatably mounted on the inner wall of the valve body 1, one end of the rotating shaft 7 is fixedly connected with a first bevel gear 8, the top of the first bevel gear 8 is meshed with a second bevel gear 9, the top of the second bevel gear 9 is fixedly mounted with a reciprocating screw 10, the outer wall of the reciprocating screw 10 is threadedly connected with a piston rod 11, the top of the piston rod 11 is fixedly mounted with a piston 12, a pneumatic plate 16 is provided above the piston 12, the piston 12 and the pneumatic plate 16 are both slidably mounted inside the slide groove 13, the slide groove 13 is opened inside the valve body 1, one side of the slide groove 13 is connected to the air inlet pipe 14, the top of the pneumatic plate 16 is fixedly mounted with a connecting plate 18, and the connecting plate 18 is fixedly mounted on the bottom end of the rack plate 19.

[0025] During operation, the blade 6 is driven to rotate by the flow of the medium, and the rotation of the blade 6 drives the rotation of the rotating shaft 7, and the rotation of the rotating shaft 7 drives the rotation of the first bevel gear 8, and the rotation of the first bevel gear 8 drives the rotation of the second bevel gear 9, and the rotation of the second bevel gear 9 drives the rotation of the reciprocating screw 10, and the rotation of the reciprocating screw 10 drives the piston rod 11 to move back and forth, and the movement of the piston rod 11 drives the piston 12 to move back and forth inside the slide groove 13, and the external air is drawn into the slide groove 13 through the air intake pipe 14. When the air pressure inside the slide groove 13 increases, the pneumatic plate 16 is pushed upward, and the movement of the pneumatic plate 16 drives the movement of the limit shaft 17, and the movement of the limit shaft 17 drives the movement of the connecting plate 18, thereby driving the rack plate 19 to move upward, thereby realizing automatic adjustment of the pressure relief port area.

[0026] like Figure 3 and Figure 4 As shown, a one-way valve 15 is installed on the outer wall of the air intake pipe 14 .

[0027] The one-way valve 15 allows the intake pipe 14 to only allow air to enter.

[0028] As shown in Figure 3 and Figure 4 , one side of the chute 13 is provided with an exhaust hole 23, which is opened in the inside of the valve body 1.

[0029] When the air enters the inside of the chute 13, the pneumatic plate 16 moves up to open the exhaust hole 23, and the air can be discharged through the exhaust hole 23, preventing the piston 12 from continuously moving to saturate the air.

[0030] As shown in Figure 3 and Figure 4 , the exhaust holes 23 are evenly arranged.

[0031] As shown in Figure 3 and Figure 4 , the top of the pneumatic plate 16 is provided with a second spring 24, which is sleeved on the outer wall of the limiting shaft 17.

[0032] When the medium pressure in the valve body 1 increases and drives the pneumatic plate 16 to move up, the second spring 24 deforms to store elastic potential energy, and when the medium pressure in the valve body 1 decreases, the second spring 24 releases the elastic potential energy to make the pneumatic plate 16 move down and reset.

[0033] As shown in Figure 2 and Figure 3 , the top of the first spring 4 is provided with an adjusting plate 25, the top end of the adjusting plate 25 is fixedly installed with a threaded rod 26, the threaded rod 26 is embedded in the inner wall of the valve body 1 and is screw connected.

[0034] In work, the threaded rod 26 can be rotated to drive the adjusting plate 25 to move, so that the adjusting plate 25 moves up and down in the inside of the valve body 1, the compression distance of the first spring 4 is adjusted to control the relief pressure.

[0035] As shown in Figure 2 and Figure 3 , the adjusting plate 25 is sleeved on the outer wall of the guide sleeve 3, and the two are slidingly connected.

[0036] A pressure adjusting method of an adjustable safety valve, comprising the following steps: S1: Before work, first rotate the threaded rod 26 to drive the adjusting plate 25 to move, so that the adjusting plate 25 moves up and down in the inside of the valve body 1, the compression distance of the first spring 4 is adjusted to control the relief pressure; S2: During operation, the blade 6 is driven to rotate by the flow of the medium. The rotation of the blade 6 drives the rotation of the rotating shaft 7. The rotation of the rotating shaft 7 drives the rotation of the first bevel gear 8. The rotation of the first bevel gear 8 drives the rotation of the second bevel gear 9. The rotation of the second bevel gear 9 drives the rotation of the reciprocating screw 10. The rotation of the reciprocating screw 10 drives the piston rod 11 to move back and forth. The movement of the piston rod 11 drives the piston 12 to move back and forth inside the slide groove 13. External air is drawn into the slide groove 13 through the air inlet pipe 14. When the air pressure inside the slide groove 13 increases, the pneumatic plate 16 is pushed upward. The movement of the pneumatic plate 16 drives the movement of the limit shaft 17. The movement of the limit shaft 17 drives the movement of the connecting plate 18, thereby driving the rack plate 19 to move upward. The movement of the rack plate 19 drives the control plate 20 to rotate. When the control plate 20 rotates, it drives the first pressure relief hole 21 to gradually overlap with the second pressure relief hole 22, thereby increasing the area of ​​the medium discharge channel. S3: The medium flowing inside the valve body 1 pushes the valve core 2 to move upward to expose the second pressure relief hole 22 , and the medium is discharged from the second pressure relief hole 22 and the first pressure relief hole 21 to release pressure.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable safety valve, comprising a valve body (1), characterized in that: A valve core (2) is slidably mounted inside the valve body (1), a guide sleeve (3) is fixedly connected to the top end of the valve core (2), and a first spring (4) is sleeved on the outer wall of the guide sleeve (3); A pressure relief pipe (5) is fixedly connected to one side of the valve body (1), and second pressure relief holes (22) are uniformly provided in an annular array on the side of the pressure relief pipe (5) close to the valve body (1). A control plate (20) is installed inside the pressure relief pipe (5), and first pressure relief holes (21) are uniformly provided in an annular array on the inner wall of the control plate (20). The control plate (20) is rotatably installed inside the pressure relief pipe (5) through an adjusting assembly. The regulating assembly comprises a rack plate (19) meshedly mounted on one side of the control plate (20), and the rack plate (19) is slidably mounted inside the valve body (1) via a driving assembly.

2. The adjustable safety valve according to claim 1, characterized in that: The first pressure relief hole (21) and the second pressure relief hole (22) located at the center of the pressure relief pipe (5) and the control plate (20) always coincide with each other.

3. The adjustable safety valve according to claim 1, characterized in that: The driving assembly comprises a blade (6) arranged inside the valve body (1), the inner wall of the blade (6) is fixedly connected to a rotating shaft (7), the rotating shaft (7) is rotatably mounted on the inner wall of the valve body (1), one end of the rotating shaft (7) is fixedly connected to a first bevel gear (8), the top end of the first bevel gear (8) is meshedly connected to a second bevel gear (9), the top end of the second bevel gear (9) is fixedly mounted to a reciprocating screw (10), the outer wall of the reciprocating screw (10) is threadedly connected to a piston rod ( 11), a piston (12) is fixedly mounted on the top of the piston rod (11), a pneumatic plate (16) is provided above the piston (12), the piston (12) and the pneumatic plate (16) are both slidably mounted inside a slide groove (13), the slide groove (13) is opened inside the valve body (1), one side of the slide groove (13) is connected to an air intake pipe (14), a connecting plate (18) is fixedly mounted on the top of the pneumatic plate (16), and the connecting plate (18) is fixedly mounted on the bottom end of the rack plate (19).

4. The adjustable safety valve according to claim 3, characterized in that: A one-way valve (15) is installed on the outer wall of the air inlet pipe (14).

5. The adjustable safety valve according to claim 3, characterized in that: An exhaust hole (23) is provided on one side of the slide groove (13), and the exhaust hole (23) is opened inside the valve body (1).

6. The adjustable safety valve according to claim 5, characterized in that: The exhaust holes (23) are evenly arranged.

7. The adjustable safety valve according to claim 3, characterized in that: A second spring (24) is provided on the top of the pneumatic plate (16), and the second spring (24) is sleeved on the outer wall of the limiting shaft (17).

8. The adjustable safety valve according to claim 1, characterized in that: An adjustment plate (25) is provided on the top of the first spring (4), and a threaded rod (26) is fixedly mounted on the top of the adjustment plate (25). The threaded rod (26) is embedded in the inner wall of the valve body (1) and is threadedly connected.

9. The adjustable safety valve according to claim 8, characterized in that: The adjustment plate (25) is sleeved on the outer wall of the guide sleeve (3), and the two are slidably connected.

10. A method for regulating pressure of an adjustable safety valve, the method being applicable to the adjustable safety valve according to claims 1 to 9, characterized in that: The following steps are involved: S1: Before operation, the adjusting plate (25) is driven to move by rotating the threaded rod (26), so that the adjusting plate (25) moves up and down inside the valve body (1), and the compression distance of the first spring (4) is adjusted to control the pressure relief pressure; S2: During operation, the blade (6) is driven to rotate by the flow of the medium. The rotation of the blade (6) drives the rotation of the rotating shaft (7). The rotation of the rotating shaft (7) drives the rotation of the first bevel gear (8). The rotation of the first bevel gear (8) drives the rotation of the second bevel gear (9). The rotation of the second bevel gear (9) drives the rotation of the reciprocating screw (10). The rotation of the reciprocating screw (10) drives the piston rod (11) to move back and forth. The movement of the piston rod (11) drives the piston (12) to move back and forth inside the slide groove (13). External air is drawn into the chute (13) through the air inlet pipe (14). When the air pressure inside the chute (13) increases, the pneumatic plate (16) is pushed upward. The movement of the pneumatic plate (16) drives the movement of the limit shaft (17). The movement of the limit shaft (17) drives the movement of the connecting plate (18), thereby driving the rack plate (19) upward. The movement of the rack plate (19) drives the control plate (20) to rotate. When the control plate (20) rotates, it drives the first pressure relief hole (21) to gradually overlap with the second pressure relief hole (22), thereby increasing the area of ​​the medium discharge channel. S3: The medium flowing inside the valve body (1) pushes the valve core (2) upward to expose the second pressure relief hole (22), and the medium is discharged from the second pressure relief hole (22) and the first pressure relief hole (21) to release the pressure.

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