Pressure relief device
By arranging elastic parts and adjustment blocks in the pressure relief device, the problem of unstable overload of the existing pressure relief device is solved, and precise control of the overload pressure and stable operation of the system are achieved.
Patent Information
- Application Number
- CN202422752966.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The existing pressure relief device is unstable when overloaded, and the overload pressure value cannot be adjusted, resulting in large fluctuations and poor stability in the regulation of the pressurized operation system.
By arranging an elastic part between the adjustment block and the guide column, the elastic part is used to apply a stable elastic force to the guide column, so that the sealing gasket and the sealing surface abut against the sealing channel. When overloaded, the guide column moves to achieve pressure relief, and the overload pressure value is regulated by the adjustment block and the clamping cap.
It achieves precise control of the overload pressure value, reduces the fluctuation of the relief pressure and the closing pressure, and ensures the stability and sealing of the pressurized operation system.
Smart Images
Figure CN223318536U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of overload protection equipment, in particular to a pressure relief device. Background Art
[0002] All pressurized operating systems include overload protection devices. Among them, the pressure relief device is a common type of overload protection device that releases overload pressure. The pressure relief device ensures the stable operation of the equipment and system by releasing overload pressure. It is an indispensable key component in various pressure-bearing systems.
[0003] Existing pressure relief devices generally have the problems of unstable overload and large fluctuations in closing pressure values. In addition, the overload pressure values of existing pressure relief devices are often uncontrollable, which in turn leads to a series of problems such as large fluctuations and poor stability in the control of pressurized operating systems.
[0004] Therefore, developing and designing a pressure relief device that can accurately control the overload pressure value, reduce the fluctuation of the discharge pressure and the closing pressure, and ensure the stable operation of the pressurized operation system is an urgent problem to be solved at this stage. Utility Model Content
[0005] In response to the problems existing in the prior art, the utility model provides a pressure relief device, in which an elastic part is located between an adjusting block and a guide column. The elastic part applies a stable elastic force to the guide column so that the sealing gasket abuts against the sealing surface to seal the channel. When the internal pressure of the pressurized system exerts a force on the guide column that is greater than the elastic force of the elastic part, the guide column can be moved, thereby separating the sealing gasket from the sealing surface to achieve pressure relief; the elastic deformation of the elastic part can be adjusted by rotating the adjusting block threadedly connected to the valve body, thereby being able to accurately control the overload pressure value; and the position of the adjusting block can be positioned by the abutment of the clamping cap against the adjusting block, thereby ensuring that the overload pressure value is stable.
[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:
[0007] The utility model provides a pressure relief device, comprising:
[0008] A valve body having a first end and a second end, a passage connecting the first end and the second end; a sealing surface; and a first internal thread on a wall of the passage near the second end.
[0009] an adjusting block, the adjusting block having a second external thread matching the first internal thread, the adjusting block being threadably connected to the channel;
[0010] A guide post is provided in the channel; a sealing gasket is provided on the guide post, and the sealing gasket is located between the sealing surface and the adjustment block; when the sealing gasket abuts against the sealing surface, the channel can be blocked;
[0011] An elastic member, one end of which abuts against the adjustment block, and the other end of which abuts against the guide column, wherein the elastic member causes the guide column to have a tendency to move away from the adjustment block.
[0012] As a preferred technical solution, it also includes a clamping cap, the outer peripheral surface of the valve body near the second end has a first external thread, the clamping cap has a second internal thread matching the first external thread, the clamping cap is threadedly connected to the valve body; the clamping cap has a clamping surface inside, and the clamping surface abuts against the adjustment block.
[0013] As a preferred technical solution, an exhaust hole connected to the plurality of channels is provided on the outer peripheral surface of the valve body; when the sealing gasket abuts against the sealing surface, the connection between the channels at the first end and the exhaust hole can be cut off.
[0014] As a preferred technical solution, the outer circumferential surface of the valve body close to the first end has a third external thread; the portion of the valve body located between the first external thread and the third external thread has a hexagonal section, and the exhaust hole is provided at the hexagonal section;
[0015] and / or, the exhaust hole extends in the radial direction of the valve body;
[0016] And / or, the diameter of the exhaust hole is set to 2-3 mm;
[0017] And / or, the number of the exhaust holes is three, and the three exhaust holes are evenly distributed along the circumference of the valve body.
[0018] As a preferred technical solution, the channel includes a first section connected to the first end and a second section connected to the second end, and the sealing surface is located between the first section and the second section; the inner diameter of the first section is smaller than the inner diameter of the second section.
[0019] As a preferred technical solution, a sealing boss is provided in the channel, a raised surface of the sealing boss forms the sealing surface, and a gap is provided between the sealing boss and the wall surface of the channel, and the gap forms a groove.
[0020] As a preferred technical solution, the guide column includes a seat located in the second section, the seat is provided with a column, and the column extends into the first section; the sealing gasket is sleeved on the column and abuts against the seat.
[0021] As a preferred technical solution, the seat body is clearance-matched with the second section, and the column body is clearance-matched with the first section;
[0022] And / or, the outer peripheral surface of one end of the column close to the first end is set as a conical surface, the diameter of the conical surface gradually decreases in the direction close to the first end, and the taper of the conical surface is set to 30±5°;
[0023] And / or, at least part of the column is always located in the first section.
[0024] As a preferred technical solution, the clamping cap is provided with a pressure regulating hole, the diameter of which is 2-2.5 mm smaller than the outer diameter of the adjusting block;
[0025] And / or, an adjustment groove is provided on the end surface of the adjustment block away from the valve body.
[0026] As a preferred technical solution, the elastic member is configured as a spring; a guide spring column is provided on the end surface of the adjustment block facing the spring and on the end surface of the guide column facing the spring, and both ends of the spring are sleeved on the guide spring column.
[0027] The beneficial effects of the present invention are as follows:
[0028] 1. The elastic member of the utility model is located between the adjustment block and the guide column. The elastic member is in a compressed state. The elastic member can exert a stable elastic force on the guide column to make the sealing gasket abut against the sealing surface to block the channel. When the internal pressure of the pressurized operating system is overloaded, the force exerted by the internal pressure of the pressurized operating system on the guide column is greater than the elastic force of the elastic member, which can drive the guide column to retreat, thereby separating the sealing gasket from the sealing surface, and the overload pressure is discharged from the channel to achieve pressure relief. The elastic force exerted by the elastic member on the guide column is the overload pressure value; the elastic deformation of the elastic member can be adjusted by rotating the adjustment block threadedly connected to the valve body, thereby accurately controlling the overload pressure value; and the position of the adjustment block can be pressed and positioned by the abutment of the clamping cap with the adjustment block to ensure a stable overload pressure value.
[0029] 2. The channel of the utility model includes a first section and a second section. The guide column includes a seat body located in the first section and a column body extending into the second section. The seat body and the first section, as well as the column body and the second section, are clearance-fitted. During the pressure relief process, at least part of the column body is still located in the second section, which can play a good guiding role and effectively reduce the fluctuations of the relief pressure and closing pressure caused by the pressure bias, thereby ensuring stable pressure relief of the pressurized operating system.
[0030] 3. A sealing boss is provided in the channel of the utility model, and the sealing gasket contacts the convex surface of the sealing boss. The convex surface of the sealing boss forms a sealing surface, and the sealing boss and the wall surface of the channel form a groove, so that impurities can accumulate in the groove without affecting the close fit between the sealing gasket and the sealing surface, thereby preventing leakage and ensuring the pressure stability of the pressurized operation system. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a pressure relief device of the present utility model;
[0032] Figure 2 for Figure 1 Enlarged view of area A in the middle;
[0033] Figure 3 for Figure 1 Top view of .
[0034] In the figure: 1-valve body, 11-first end, 12-second end, 13-channel, 131-sealing surface, 132-first internal thread, 133-first section, 134-second section, 14-first external thread, 15-exhaust hole, 16-third external thread, 17-hexagonal section, 18-empty knife groove, 2-adjusting block, 21-second external thread, 22-adjusting groove, 3-guide column, 31-seat body, 32-column, 321-conical surface, 4-sealing gasket, 5-elastic member, 51-spring guide column, 6-pressing cap, 61-second internal thread, 62-pressing surface, 63-pressure regulating hole, 7-sealing boss, 71-gap, 8-sealing ring. DETAILED DESCRIPTION
[0035] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0036] Please refer to Figure 1-Figure 3, is an embodiment of a pressure relief device provided by the utility model, including a valve body 1, the valve body 1 having a first end 11 and a second end 12, and a channel 13 connecting the first end 11 and the second end 12; the channel 13 has a first internal thread 132 on a wall surface near the second end 12, and the adjustment block 2 has a second external thread 21 matching the first internal thread 132. The adjustment block 2 is threadedly connected to the channel 13, and the position of the adjustment block 2 in the channel 13 can be adjusted by rotating the adjustment block 2, so that the elastic member 5 is in a predetermined compression state; the channel 13 has a sealing surface 131, the guide column 3 is arranged in the channel 13, and a sealing gasket 4 is provided on the guide column 3. The sealing gasket 4 is located between the sealing surface 131 and the adjusting block 2. One end of the elastic member 5 abuts the adjusting block 2, and the other end of the elastic member 5 abuts the guide column 3. The elastic member 5 makes the guide column 3 tend to move away from the adjusting block 2. When the sealing gasket 4 abuts the sealing surface 131, the channel 13 can be blocked. The elastic deformation of the elastic member 5 can be adjusted by rotating the adjusting block 2 threadedly connected to the valve body 1, thereby accurately regulating the overload pressure value.
[0037] For further information, please refer to Figure 1 The valve body 1 has a first external thread 14 on its outer peripheral surface near the second end 12, and the clamping cap 6 has a second internal thread 61 matching the first external thread 14. The clamping cap 6 is threadedly connected to the valve body 1, and a clamping surface 62 is provided inside the clamping cap 6. The clamping surface 62 abuts against the adjustment block 2, which can clamp the adjustment block 2 into position to ensure the stability of the overload pressure value.
[0038] In this embodiment, please refer to Figure 1-Figure 3 In order to ensure that the internal pressure of the pressure operating system is discharged smoothly, the outer peripheral surface of the valve body 1 is provided with exhaust holes 15 connected to a plurality of channels 13. The communication openings between the exhaust holes 15 and the channels 13 are located between the sealing surface 131 and the second end 12 and are arranged as close to the sealing surface 131 as possible. When the sealing gasket 4 abuts the sealing surface 131, the communication between the channels 13 at the first end 11 and the exhaust holes 15 can be cut off, and the pressure is maintained. When the sealing gasket 4 is separated from the sealing surface 131, the channels 13 at the first end 11 are connected to the exhaust holes 15, and the internal pressure can be quickly discharged.
[0039] Based on the above examples, please refer to Figure 1-Figure 3 The valve body 1 has a third external thread 16 on its outer peripheral surface near the first end 11, which can ensure that the present invention is effectively connected to the pressurized operating system through a threaded connection; the valve body 1 has a hexagonal section 17 on the portion between the first external thread 14 and the third external thread 16, and the valve body 1 can be easily rotated through the hexagonal section 17 to thread the valve body 1 to the pressurized operating system.
[0040] For clarification, please refer to Figure 1 and Figure 2 In order to ensure the sealing between the valve body 1 and the pressurized operating system, an empty knife groove 18 is provided on the outside of the valve body 1 at the end of the third external thread 16, and a sealing ring 8 is installed on the empty knife groove 18.
[0041] For details, please refer to Figure 1-Figure 3 The exhaust hole 15 is preferably provided at the hexagonal section 17. The exhaust hole 15 extends radially along the valve body 1. The diameter of the exhaust hole 15 is preferably set to 2-3 mm. There are three exhaust holes 15. The three exhaust holes 15 are evenly distributed along the circumference of the valve body 1, which can ensure smooth pressure relief. In other embodiments, the exhaust hole 15 can also be provided at other positions, the extension direction of the exhaust hole 15 can also be set to other directions, and the number of the exhaust holes 15 can also be set to other values, so as to achieve stable and smooth pressure relief.
[0042] In this embodiment, please refer to Figure 1 and Figure 2 The channel 13 includes a first section 133 connected to the first end 11 and a second section 134 connected to the second end 12. The sealing surface 131 is located between the first section 133 and the second section 134. The inner diameter of the first section 133 is smaller than the inner diameter of the second section 134, ensuring that the position and shape of the sealing surface 131 match the sealing gasket 4, ensuring the sealing effect, and facilitating processing.
[0043] Based on the above examples, please refer to Figure 1 and Figure 2 A sealing boss 7 is provided in the channel 13, and the raised surface of the sealing boss 7 forms a sealing surface 131. There is a gap between the sealing boss 7 and the wall of the channel 13, and the gap can form a groove 71. Impurities in the channel 13 can accumulate in the groove 71 without affecting the close fit between the sealing gasket 4 and the sealing surface 131, thereby preventing leakage and ensuring the pressure stability of the pressurized operation system.
[0044] In this embodiment, please refer to Figure 1 and Figure 2 The guide column 3 includes a seat body 31 located in the second section 134, and a column 32 is provided on the seat body 31. The column 32 extends into the first section 133, and the guide column 3 can move smoothly along the channel 13; the sealing gasket 4 is sleeved on the column 32 and abuts against the seat body 31, thereby achieving fixation and sealing between the sealing gasket 4 and the guide column 3, and ensuring the sealing performance when the sealing gasket 4 abuts against the sealing surface 131.
[0045] Based on the above examples, please refer to Figure 1 and Figure 2In order to improve the guiding effect, the outer peripheral surface of the end of the column 32 close to the first end 11 is preferably set as a tapered surface 321, the diameter of the tapered surface 321 gradually decreases in the direction close to the first end 11, and the taper of the tapered surface 321 is set to 30±5°; further, the minimum diameter of the tapered surface 321 is preferably 0.3-0.5mm smaller than the inner diameter of the sealing gasket 4, which is convenient for fitting and fixing the sealing gasket 4 on the guide column 3 and has good process characteristics.
[0046] Specifically, in order to ensure that the guide column 3 can move smoothly along the channel 13, a clearance fit is set between the seat body 31 and the second section 134, and between the column 32 and the first section 133; at the same time, the column 32 should have a sufficient length so that at least part of the column 32 is always located in the first section 133. When the air is deflated, the column 32 and the first section 133 can still be clearance-fitted, so that the positioning of the guide column 3 can always be maintained.
[0047] In this embodiment, please refer to Figure 1 and Figure 3 , a pressure regulating hole 63 is provided on the clamping cap 6, and correspondingly, an adjusting groove 22 is provided on the end surface of the adjusting block 2 away from the valve body 1. The tool passes through the pressure regulating hole 63 and extends into the adjusting groove 22, so that the adjusting block 2 can be easily rotated; specifically, the diameter of the pressure regulating hole 63 is preferably 2-2.5mm smaller than the outer diameter of the adjusting block 2, ensuring that the pressure regulating hole 63 has a large space for the tool to pass through, while the clamping surface 62 has a large enough area to abut against the adjusting block 2, pressing the adjusting block 2 into position, and effectively ensuring the flexibility of the adjusting block 2 in the non-pressurized state.
[0048] For clarification, please refer to Figure 1 The elastic member 5 is set as a spring; a guide spring column 51 is provided on the end surface of the adjustment block 2 facing the spring and the end surface of the guide column 3 facing the spring, and both ends of the spring are sleeved on the guide spring column 51, which can ensure that the spring will not have serious eccentricity during the compression deformation process, affecting the accuracy of the overload pressure value during pressure relief; in other embodiments, the elastic member 5 can also be a spring sheet, so as to be able to apply a stable elastic force to the guide column 3.
[0049] The specific working process of this utility model is as follows:
[0050] The third external thread 16 on the valve body 1 is connected to the pressurized operating system thread seal;
[0051] Use a tool (such as a screwdriver) to pass through the pressure regulating hole 63 and into the regulating slot 22 to rotate the adjusting block 2, adjust the deformation of the elastic member 5, set the predetermined pressure relief pressure value, tighten the pressing cap 6 so that the pressing surface 62 contacts the adjusting block 2, and press the adjusting block 2 into position;
[0052] When the operating pressure of the pressurized system is not greater than the predetermined pressure relief pressure value, the utility model does not operate; when the operating pressure of the pressurized system is greater than the predetermined pressure relief pressure value, under the action of the operating pressure, the sealing gasket 4 is separated from the sealing surface 131, and the overload pressure is relieved through the channel 13 and the exhaust hole 15. After the pressure relief, the operating pressure of the pressurized system is reduced. When the operating pressure is reduced to the predetermined pressure relief pressure value, under the action of the elastic member 5, the sealing gasket 4 abuts against the sealing surface 131, and the seal is achieved again, completing the pressure relief action of the pressurized system.
[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A pressure relief device, characterized in that: include: A valve body (1), the valve body (1) having a first end (11) and a second end (12), the valve body (1) having a channel (13) in communication with the first end (11) and the second end (12); the channel (13) having a sealing surface (131) in the channel (13), and a first internal thread (132) on a wall surface of the channel (13) near the second end (12); an adjusting block (2), the adjusting block (2) having a second external thread (21) matching the first internal thread (132), the adjusting block (2) being threadably connected to the channel (13); A guide post (3), the guide post (3) being arranged in the channel (13); a sealing gasket (4) being provided on the guide post (3), the sealing gasket (4) being located between the sealing surface (131) and the adjustment block (2); and the channel (13) being blocked when the sealing gasket (4) abuts against the sealing surface (131); An elastic member (5), one end of the elastic member (5) abuts against the adjustment block (2), and the other end of the elastic member (5) abuts against the guide column (3), and the elastic member (5) causes the guide column (3) to have a tendency to move away from the adjustment block (2).
2. A pressure relief device according to claim 1, further comprising a clamping cap (6), wherein the outer peripheral surface of the valve body (1) near the second end (12) has a first external thread (14), and the clamping cap (6) has a second internal thread (61) matching the first external thread (14), and the clamping cap (6) is threadedly connected to the valve body (1); a clamping surface (62) is provided inside the clamping cap (6), and the clamping surface (62) abuts against the adjustment block (2).
3. A pressure relief device according to claim 1, characterized in that: The outer peripheral surface of the valve body (1) is provided with exhaust holes (15) connected to the plurality of channels (13); when the sealing gasket (4) abuts against the sealing surface (131), the communication between the channels (13) at the first end (11) and the exhaust holes (15) can be cut off.
4. A pressure relief device according to claim 3, characterized in that: The valve body (1) has a third external thread (16) on its outer circumferential surface close to the first end (11); the valve body (1) has a first external thread (14) on its outer circumferential surface close to the second end (12); the valve body (1) has a hexagonal section (17) on a portion located between the first external thread (14) and the third external thread (16); and the exhaust hole (15) is provided at the hexagonal section (17); and / or, the exhaust hole (15) extends in the radial direction of the valve body (1); and / or, the diameter of the exhaust hole (15) is set to 2-3 mm; And / or, the number of the exhaust holes (15) is three, and the three exhaust holes (15) are evenly distributed along the circumference of the valve body (1).
5. A pressure relief device according to claim 1, characterized in that: The channel (13) comprises a first section (133) communicating with the first end (11) and a second section (134) communicating with the second end (12); the sealing surface (131) is located between the first section (133) and the second section (134); and the inner diameter of the first section (133) is smaller than the inner diameter of the second section (134).
6. A pressure relief device according to claim 1 or 5, characterized in that: A sealing boss (7) is provided in the channel (13), the raised surface of the sealing boss (7) forms the sealing surface (131), and a gap is provided between the sealing boss (7) and the wall surface of the channel (13), the gap forming a groove (71).
7. A pressure relief device according to claim 5, characterized in that: The guide column (3) includes a seat (31) located in the second section (134), a column (32) is provided on the seat (31), and the column (32) extends into the first section (133); the sealing gasket (4) is sleeved on the column (32) and abuts against the seat (31).
8. A pressure relief device according to claim 7, characterized in that: The seat body (31) and the second section (134) are clearance-fitted, and the column (32) and the first section (133) are clearance-fitted; And / or, the outer peripheral surface of one end of the column (32) close to the first end (11) is set as a conical surface (321), the diameter of the conical surface (321) gradually decreases in a direction close to the first end (11), and the taper of the conical surface (321) is set to 30±5°; And / or, at least a portion of the column (32) is always located in the first section (133).
9. A pressure relief device according to claim 2, characterized in that: The clamping cap (6) is provided with a pressure regulating hole (63), and the diameter of the pressure regulating hole (63) is 2-2.5 mm smaller than the outer diameter of the adjustment block (2); And / or, an adjustment groove (22) is provided on the end surface of the adjustment block (2) away from the valve body (1).
10. The pressure relief device according to claim 1, characterized in that: The elastic member (5) is configured as a spring; a spring guide column (51) is provided on the end surface of the adjustment block (2) facing the spring and on the end surface of the guide column (3) facing the spring, and both ends of the spring are sleeved on the spring guide column (51).