A pressure relief valve and pressure relief method for eliminating continuous pressure fluctuations

Abstract

The present invention relates to the technical field of pressure relief valves, and specifically to a pressure relief valve and a pressure relief method for eliminating continuous pressure fluctuations, including: a valve body, in which a valve plate is disposed; a hinge rod rotatably connected to the valve plate, and an embedded shaft is provided at one end of the hinge rod away from the valve plate; a guide plate fixedly installed inside the valve body, on which a guide groove and a deceleration groove are provided, and the embedded shaft can be guided from the guide groove into the deceleration groove; when the valve plate acts to complete the pressure relief action, the embedded shaft cooperates with the deceleration groove to slow down the reset speed of the valve plate, so as to achieve continuous pressure relief, prevent the sealing performance from decreasing due to the continuous action of the valve plate, and improve durability.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure relief valves, and specifically to a pressure relief valve and a pressure relief method for eliminating continuous pressure fluctuations. Background Art

[0002] An oil tanker is a vehicle specifically designed for transporting liquid fuels such as gasoline and diesel. Its tank body has a unique design and has the ability to safely transport liquid fuels. At the same time, it also plays an important role in storage, temperature control, and environmental protection, and is an indispensable part of the fuel supply chain.

[0003] When the oil tanker starts or stops, the oil in the tank moves towards one side inside the tank due to inertia, forming an impact force, which instantaneously increases the pressure on one side of the tank body; when the oil moves to one side of the tank body, the oil will move in the reverse direction after the impact, thus instantaneously increasing the pressure on the other side of the tank body; this kind of sloshing will cause the oil to impact back and forth inside the tank body, resulting in a periodic pressure change on the tank wall and instantaneously increasing the pressure inside the tank.

[0004] In order to eliminate the influence of the instantaneously increased pressure inside the tank on the tank structure and sealing performance, existing oil tanks are all equipped with pressure relief valves. The working principle of the pressure relief valve is based on the principle of pressure balance. When the pressure inside the tank exceeds the set pressure value of the pressure relief valve, the pressure relief valve will automatically open to release the excessive pressure to protect the tank body and related components from damage; however, during the starting and stopping processes of the oil tanker, the sloshing degree of the oil inside it will gradually decrease periodically, and the generated pressure will also decrease periodically. After the pressure relief valve opens, it can complete the pressure relief action in a short time. At this time, the valve will quickly close. However, the oil inside the tank will still generate a certain pressure inside the tank due to inertia. The generation of this pressure will cause the pressure relief valve to open and close frequently, causing components of the pressure relief valve such as springs, valve cores, and valve stems to bear repeated impact forces, resulting in fatigue damage to these components, shortening the service life of the valve, and even possibly making the valve unable to open or close normally. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure relief valve and a pressure relief method for eliminating continuous pressure fluctuations to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A pressure relief valve for eliminating continuous pressure fluctuations, comprising:

[0008] A valve body, with a valve plate disposed inside the valve body;

[0009] A hinge rod, rotatably connected to the valve plate, and an embedded shaft is provided at one end of the hinge rod away from the valve plate;

[0010] The guiding plate is fixedly installed inside the valve body. A guiding groove and a decelerating groove are arranged on the guiding plate, and the embedded shaft can be guided by the guiding groove into the decelerating groove;

[0011] When the valve plate moves to complete the pressure relief action, the embedded shaft cooperates with the decelerating groove to slow down the reset speed of the valve plate.

[0012] As a further solution of the present invention: it further includes an extension part connected to one end of the valve body and an end cover covering the extension part. A plurality of groups of convex blocks are arranged on the circumferential side of the end cover, and the convex blocks are in contact with a convex ring arranged inside the extension part;

[0013] An annular groove is further arranged inside the extension part, and a detachable locking ring is arranged in the annular groove. The locking ring is in contact with one end of the convex block away from the convex ring.

[0014] As a further solution of the present invention: a valve rod is fixedly installed on the valve plate. The valve rod is slidably connected to the end cover, and a cylindrical spring is sleeved on the valve rod. One end of the cylindrical spring is connected to the valve rod, and the other end is connected to the end cover.

[0015] As a further solution of the present invention: an inner conical surface is formed inside the valve body, and the inner conical surface is adapted to the valve plate;

[0016] At least one sealing gasket is arranged on one side of the valve plate adapted to the inner conical surface.

[0017] As a further solution of the present invention: the guiding groove includes a vertical groove arranged on the guiding plate. A first inclined groove and a second inclined groove are arranged near the end of the vertical groove;

[0018] The guiding groove further includes side connection grooves communicating with a plurality of groups of the vertical grooves and parallel to the second inclined groove. The embedded shaft can enter the decelerating groove through the second inclined groove and the side connection grooves;

[0019] A commutation structure is arranged at the connection of the first inclined groove, the second inclined groove and the side connection grooves with the vertical groove. The commutation structure can guide the embedded shaft to enter the second inclined groove or the side connection groove when moving in the reverse direction.

[0020] As a further solution of the present invention: the commutation structure includes a first switching member rotatably installed at the connection of the first inclined groove and the vertical groove, and a second switching member at the connections of the second inclined groove with the vertical groove and the side connection groove with the vertical groove;

[0021] The first switching member is parallel to the length direction of the first inclined groove, and the second switching member is parallel to the length direction of the vertical groove.

[0022] As a further solution of the present invention: the second inclined groove and the plurality of groups of side connecting grooves are connected to the speed reduction groove at equal intervals;

[0023] The deceleration groove includes a plurality of groups of rollover grooves connected in sequence, and the rollover groove includes a first arc groove and a second arc groove.

[0024] As a further solution of the present invention: the side of the hinged rod is provided with an abutment shaft coaxial with the embedded shaft, and the abutment shaft is connected to an active control component provided on the valve body;

[0025] The active control assembly comprises a rotating rod rotatably arranged through the valve body, a first connecting rod is arranged at one end of the rotating rod, a second connecting rod is arranged at the other end, and a fitting shaft is arranged at one end of the second connecting rod away from the rotation center thereof;

[0026] The active control component also includes a pressure plate slidably disposed in the valve body and abutting against the abutment shaft. The pressure plate is provided with a transverse groove along its length direction, and the engaging shaft can slide in the transverse groove.

[0027] A pressure relief method, using the pressure relief valve for eliminating continuous pressure fluctuations, comprises:

[0028] When the tanker truck starts to drive or slows down to stop, high pressure is generated in the tank. At this time, the high-pressure gas acts on the valve plate to separate the valve plate from the inner cone surface, thereby performing a pressure relief action. After the pressure relief action is completed, the embedded shaft will enter the deceleration groove through the guide groove, and the speed of the valve plate will be slowed down during the resetting process, so as to continuously relieve the high pressure in the tank.

[0029] When high pressure continues to be generated in the oil tank and the valve plate does not perform pressure relief action, the active control component is activated and the control valve plate is forced to separate from the inner cone surface to perform pressure relief action.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] By setting the articulated rod, embedded shaft, guide groove and deceleration groove, the movement distance and reset time of the valve plate can be automatically adjusted according to the change of the pressure in the oil tank, ensuring effective pressure relief under different working conditions. By extending the reset time of the valve plate, frequent opening and closing caused by oil shaking can be avoided, the action frequency of the valve plate can be reduced, the wear of internal parts can be reduced, and the durability and stability of the pressure relief valve can be improved. In addition, the structure can also effectively protect the tank truck from high pressure damage when starting or stopping, ensuring the safe operation of the tank truck. At the same time, this adaptive design improves the automation of the system, reduces maintenance costs and repair difficulties, and further improves the economy and reliability of the equipment.

[0032] Through the provided active control component, when the pressure relief valve fails, the valve plate can be forced to open to perform the pressure relief action, preventing the pressure inside the oil tank from continuously increasing and damaging the sealing of the oil tank. It can ensure that when the pressure relief valve cannot be normally opened due to a fault, through the linkage of the pressure sensor and the cylinder, the valve plate is forced to open, thereby protecting the safety of the oil tank. Description of the Drawings

[0033] Figure 1 Schematic structural diagram of an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0034] Figure 2 Schematic structural diagram of another angle in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0035] Figure 3 Exploded view of an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0036] Figure 4 Schematic structural diagram of the interior of the valve body in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0037] Figure 5 Cross-sectional view of the valve body in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0038] Figure 6 Schematic structural diagram of the valve plate, hinge rod, and guide plate in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0039] Figure 7 Schematic structural diagram of the hinge rod and the embedded shaft in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0040] Figure 8 Schematic structural diagram of the guide groove and the deceleration groove in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0041] Figure 9 Schematic structural diagram of the active control component in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0042] In the figure: 1. Valve body; 101. Inner conical surface; 2. Extension part; 201. Convex ring; 202. Annular groove; 3. End cover; 301. Convex block; 4. Valve stem; 5. Valve plate; 6. Spring; 7. Lock ring; 8. Sealing washer; 9. Hinge rod; 10. Embedded shaft; 11. Contact shaft; 12. Guide plate; 1201. Vertical groove; 13. Flip groove; 1301. First arc groove; 1302. Second arc groove; 14. First inclined groove; 15. Second inclined groove; 1501. Side connection groove; 16. First switching piece; 17. Second switching piece; 18. Cylinder; 19. First connecting rod; 20. Rotating rod; 21. Second connecting rod; 22. Fitting shaft; 23. Pressing plate; 2301. Horizontal groove; 24. Guide piece. Detailed implementation manner

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, which can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0045] Please refer to Figures 1 to 9 , in the embodiment of the present invention, a pressure relief valve for eliminating continuous pressure fluctuations includes: a valve body 1, a hinge rod 9, and a guide plate 12.

[0046] The valve body 1 internally houses a valve plate 5. Specifically, one end of the valve body 1 is provided with an extension part 2, and a matching end cover 3 is provided on the extension part 2. A plurality of convex blocks 301 are provided on the circumferential side of the end cover 3, and the convex blocks 301 are in contact with a convex ring 201 provided inside the extension part 2;

[0047] An annular groove 202 is further provided inside the extension part 2, and a detachable lock ring 7 is provided in the annular groove 202. The lock ring 7 is in contact with one end of the convex block 301 away from the convex ring 201;

[0048] During the assembly of the valve body, first place the end cover 3 inside the extension part 2, and make the convex block 301 on the end cover 3 abut against the convex ring 201 on the inner wall of the extension part 2. Among them, one side of the convex block 301 facing the convex ring 201 and the end far from the end cover 3 are inclined. When the end cover 3 is placed into the extension part 2, this inclined part abuts against the end of the extension part 2 far from the valve body 1, thereby guiding the end cover 3 to smoothly enter the valve body 1, effectively reducing the difficulty of placing the end cover 3 in the valve body 1 and improving the assembly efficiency.

[0049] The lock ring 7 is a non-fully enclosed circular structure, that is, there is an opening on the lock ring 7. After the end cover 3 is installed in place, by squeezing both sides of the lock ring 7, the circumferential radius of the lock ring 7 can be reduced, so that it can be more conveniently placed into the extension part 2. When the lock ring 7 enters the extension part 2 and moves to the position of the annular groove 202, the lock ring 7 releases the compressed force and actively embeds into the annular groove 202. At this time, the lock ring 7 can abut against the end of the convex block 301 far from the convex ring 201, thereby realizing the restriction of the convex block 301 and completing the fixation of the end cover 3. This fixation method is not only simple to operate but also reliably connected, ensuring that the end cover 3 will not loosen during use.

[0050] Through the above settings, a detachable connection is achieved between the end cover 3 and the extension part 2. This detachable connection method has significant advantages in practical applications. When the parts inside the valve body 1 are damaged, maintenance personnel do not need to disassemble the entire valve body. They only need to simply operate to disassemble the end cover 3, replace or repair the damaged parts. This not only reduces the maintenance difficulty, shortens the maintenance time, but also reduces the economic losses caused by long-term shutdown, effectively reducing the use cost of the equipment.

[0051] Furthermore, a small hole is provided on the extension part 2 along its radial direction, and this small hole can extend into the annular groove 202. When it is necessary to disassemble the end cover 3, insert a sharp object into the small hole, which can drive the lock ring 7 to deform, so as to separate from the annular groove 202 and realize the disassembly of the end cover 3. This design makes the disassembly process more convenient. Without using complex tools, the end cover 3 can be quickly disassembled, further improving the maintenance efficiency and ensuring the normal operation of the equipment.

[0052] Furthermore, a valve rod 4 is fixedly installed on the valve plate 5. The valve rod 4 is slidably connected to the end cover 3, and a cylindrical spring 6 is sleeved on the valve rod 4. One end of the cylindrical spring 6 is connected to the valve rod 4, and the other end is connected to the end cover 3. An inner conical surface 101 is formed inside the valve body 1, and the inner conical surface 101 is adapted to the valve plate 5;

[0053] At least one sealing washer 8 is provided on the side of the valve plate 5 adapted to the inner conical surface 101.

[0054] In the initial state, the cylindrical spring 6 is in a stretched state, applying a continuous pulling force to the valve stem 4. This pulling force causes the valve plate 5 to have a tendency to move towards the inner conical surface 101, ensuring that the valve plate 5 is in close contact with the inner conical surface 101. A sealing washer 8 is provided on the valve plate 5. When the valve plate 5 abuts against the inner conical surface 101, the sealing washer 8 is squeezed and deformed, filling the tiny gap between the valve plate 5 and the inner conical surface 101, thereby achieving a good sealing effect.

[0055] The valve plate 5 is slidably connected to the end cover 3 through the valve stem 4. This design enables the valve stem 4 and the end cover 3 to effectively limit the position of the valve plate 5. With the cooperation of the valve stem 4 and the end cover 3, the valve plate 5 and the inner conical surface 101 maintain a high degree of coaxiality. When the valve plate 5 abuts against the inner conical surface 101, the joint surface between the two is more uniform, further improving the sealing effect. This structural design not only improves the sealing performance of the valve but also enhances the stability and reliability of the valve.

[0056] The above structural design has significant advantages in practical applications. When the pressure in the system exceeds the set safety value, the pulling force of the cylindrical spring 6 causes the valve plate 5 to quickly leave the inner conical surface 101, achieving rapid pressure relief and effectively protecting the safety of the system. After pressure relief, the system pressure returns to normal, and the cylindrical spring 6 causes the valve plate 5 to closely fit the inner conical surface 101 again, restoring the sealed state. The entire process requires no manual intervention, and the valve can automatically complete the pressure relief and sealing actions, improving the automation level and operating efficiency of the system.

[0057] In addition, this structure is also convenient for maintenance and repair. If it is necessary to replace the sealing washer 8 or other components, simply slide the valve plate 5 out of the end cover 3, and then the maintenance or replacement operation can be carried out. This design not only reduces the maintenance difficulty but also shortens the maintenance time, reduces the downtime loss caused by maintenance, and improves the availability and economy of the equipment.

[0058] Please refer to Figures 6 to 8 , the articulated rod 9 is rotatably connected to the valve plate 5, and an embedded shaft 10 is provided at one end of the articulated rod 9 away from the valve plate 5;

[0059] The guide plate 12 is fixedly installed inside the valve body 1. The guide plate 12 is provided with a guide groove and a deceleration groove, and the embedded shaft 10 can be guided from the guide groove into the deceleration groove;

[0060] When the valve plate 5 moves to complete the pressure relief action, the cooperation between the embedded shaft 10 and the deceleration groove can slow down the reset speed of the valve plate 5.

[0061] In this embodiment, when high pressure is generated inside the oil tank, the high-pressure gas will act on the valve plate 5, causing the valve plate 5 to overcome the tension of the cylindrical spring 6 and move away from the inner conical surface 101. During the movement of the valve plate 5, the articulated rod 9 connected thereto will be driven to move, so that the embedded shaft 10 moves along the guiding groove. At this time, the valve body 1 is in a conducting state and can perform corresponding pressure relief actions, effectively releasing the high pressure inside the oil tank and protecting the oil tank body from being damaged by high pressure.

[0062] After the pressure relief is completed, the tension of the cylindrical spring 6 will drive the valve plate 5 to reset. During the reset process, the embedded shaft 10 will enter the deceleration groove and decelerate under the action of the deceleration groove. This can slow down the reset speed of the valve plate 5 and prevent the valve plate 5 from continuously operating due to the high pressure generated again by the continuous sloshing of the oil body due to inertia after the valve plate 5 quickly resets, reduce the action frequency of the valve plate 5, effectively reduce the unnecessary wear of the components inside the valve body 1, and improve the durability and stability of the pressure relief valve.

[0063] Based on the above structure, especially during the start or stop of the oil tanker, high pressure is easily generated inside the oil tank due to the sloshing of the oil body. This pressure relief valve can timely relieve this part of the high pressure to ensure the safe operation of the oil tanker. At the same time, the slow reset of the valve plate 5 can continuously relieve the subsequent high pressure generated by the sloshing of the oil body due to inertia, further enhancing the safety of the system.

[0064] The guiding groove includes a vertical groove 1201 provided on the guiding plate 12, and a first inclined groove 14 and a second inclined groove 15 are provided near the end of the vertical groove 1201;

[0065] The guiding groove further includes a side connection groove 1501 communicating with multiple groups of the vertical grooves 1201 and parallel to the second inclined groove 15. The embedded shaft 10 can enter the deceleration groove through the second inclined groove 15 and the side connection groove 1501;

[0066] A commutation structure is provided at the connection of the first inclined groove 14, the second inclined groove 15 and the side connection groove 1501 with the vertical groove 1201. The commutation structure can guide the embedded shaft 10 to enter the second inclined groove 15 or the side connection groove 1501 when moving in the reverse direction. The commutation structure includes a first switching member 16 rotatably installed at the connection of the first inclined groove 14 and the vertical groove 1201, and a second switching member 17 at the connections of the second inclined groove 15 with the vertical groove 1201 and the side connection groove 1501 with the vertical groove 1201. It should be noted that torsion springs are provided on the rotating shafts of the first switching member 16 and the second switching member 17;

[0067] The first switching member 16 is parallel to the length direction of the first inclined groove 14, and the second switching member 17 is parallel to the length direction of the vertical groove 1201.

[0068] In this embodiment, when the valve plate 5 drives the hinge rod 9 to move along the vertical groove 1201, a pressure relief action can be performed. At the same time, according to the magnitude of the high pressure generated in the oil tank, the distance that the valve plate 5 moves and drives the embedded shaft 10 to move through the hinge rod 9 is different. Specifically, when the shaking degree of the oil body in the oil tank is greater, the generated pressure is greater. At this time, when the pressure acts on the valve plate 5, the moving distance of the valve plate 5 is greater, and the distance that the embedded shaft 10 can move along the vertical groove 1201 is also greater, and vice versa.

[0069] Based on the uncertainty of the moving stroke of the embedded shaft 10, in the embodiment, as the embedded shaft 10 moves, it can abut against the second switching member 17 and cause the second switching member 17 to deflect. When the embedded shaft 10 moves to be separated from the second switching member 17, under the action of the torsion spring, the second switching member 17 can reset. Subsequently, the movement of the embedded shaft 10 will continue to move or move in the reverse direction according to the pressure in the oil tank. When moving in the reverse direction, the second switching member 17 can guide the embedded shaft 10 into the side connection groove 1501 and enter the deceleration groove, so that the valve plate 5 slowly resets. When the embedded shaft 10 continues to move, it will also abut against the second switching member 17 with which it is associated and cause the second switching member 17 to deflect, so that when moving in the reverse direction, it enters the deceleration groove from the second inclined groove 15 or different side connection grooves 1501.

[0070] Particularly, when the shaking degree of the oil body in the oil tank is relatively large, the generated pressure is greater, and the distance that the embedded shaft 10 follows the valve plate 5 to move is also longer. At this time, when the valve plate 5 and the embedded shaft 10 move in the reverse direction, the moving distance in the deceleration groove is longer, so that the reset time of the valve plate 5 is longer. Since when the shaking degree of the oil body is large, the time for it to continue shaking due to inertia is also longer, the delayed reset of the valve plate 5 can ensure continuous pressure relief in this case, that is, the automatic matching of the closing time of the valve plate 5 and the shaking degree of the oil body is realized, ensuring the pressure relief effect.

[0071] Furthermore, when the valve plate 5 resets, the embedded shaft 10 can abut against the first switching member 16 and cause it to deflect. When the embedded shaft 10 moves to the end of the vertical groove 1201, it is separated from the first switching member 16, and the first switching member 16 resets under the action of the torsion spring.

[0072] The second inclined groove 15 and multiple groups of side connection grooves 1501 are communicated with the deceleration groove at equal intervals;

[0073] The deceleration groove includes multiple groups of sequentially connected turning grooves 13, and the turning groove 13 includes a first arc groove 1301 and a second arc groove 1302.

[0074] In this embodiment, when the valve plate 5 drives the hinge rod 9 to move along the vertical groove 1201, pressure relief actions of different degrees will be performed according to the magnitude of the high pressure generated in the oil tank. Specifically, the greater the degree of oil body sloshing in the oil tank, the greater the generated pressure, and the longer the distance that the valve plate 5 moves under the action of the pressure, thereby driving the embedded shaft 10 to move a longer distance along the vertical groove 1201; conversely, it is shorter.

[0075] When the embedded shaft 10 enters the deceleration groove from the side connection groove 1501 or the second inclined groove 15, the embedded shaft 10 will perform reciprocating oscillations in the deceleration groove. This oscillation method can effectively reduce the speed of the embedded shaft 10 moving towards the first inclined groove 14, thereby extending the reset time of the valve plate 5 and enabling the pressure relief valve to continuously relieve pressure for a longer time.

[0076] Specifically, referring to Figure 8 , the switching slope between the first arc groove 1301 and the second arc groove 1302 gradually increases from the bottom to the top. When the embedded shaft 10 acts on the side walls of the first arc groove 1301 and the second arc groove 1302, the lateral component force generated in the initial stage is small and then gradually increases. This design enables the embedded shaft 10 to have a gradually accelerating process when moving to the inflection point of the reciprocating oscillation. During the continuous reciprocating oscillation process, the movement of the embedded shaft 10 is decelerated to a greater extent, further extending the reset time of the valve plate 5, thereby providing a pressure relief action for a longer time.

[0077] Based on the above settings, it is possible to automatically adjust the movement distance and reset time of the valve plate 5 according to the change in the pressure in the oil tank, ensuring effective pressure relief under different working conditions. By extending the reset time of the valve plate 5, it is possible to avoid frequent opening and closing caused by oil body sloshing, reduce the action frequency of the valve plate 5, reduce the wear of internal components, and improve the durability and stability of the pressure relief valve; in addition, this structure can also effectively protect the oil tanker from high-pressure damage during starting or stopping, ensuring the safe operation of the oil tanker; at the same time, this adaptive design improves the automation level of the system, reduces the maintenance cost and repair difficulty, and further enhances the economy and reliability of the equipment.

[0078] Please refer to Figure 1 、 Figure 2 、 Figure 9 , a contact shaft 11 coaxial with the embedded shaft 10 is provided on the side of the hinge rod 9, and the contact shaft 11 is connected to the active control component provided on the valve body 1;

[0079] The active control component includes a rotating rod 20 rotatably arranged through the valve body 1. One end of the rotating rod 20 is provided with a first connecting rod 19, and the other end is provided with a second connecting rod 21. One end of the second connecting rod 21 away from its rotation center is provided with a fitting shaft 22, and the second connecting rod 21 is rotatably connected to a cylinder 18 arranged outside the valve body 1;

[0080] The active control component further includes a pressure application plate 23 slidably arranged in the valve body 1 and in abutting fit with the abutting shaft 11. A horizontal groove 2301 is arranged along the length direction of the pressure application plate 23, and the fitting shaft 22 can slide in the horizontal groove 2301. Wherein, the pressure application plate 23 is slidably connected to a guide member 24 arranged in the valve body 1.

[0081] In this embodiment, when the pressure relief valve fails and when the pressure reaches a preset value and the valve plate 5 cannot be actively opened, a pressure sensor arranged on the oil tank acts on the control cylinder 18 and drives the first connecting rod 19 to rotate. At this time, the rotating rod 20 will rotate and drive the second connecting rod 21 to rotate. During this process, the fitting shaft 22 will perform a circular motion and, in cooperation with the horizontal groove 2301, drive the action of the pressure application plate 23. In the initial state, the pressure application plate 23 is in a state of abutting against the abutting shaft 11, so that when the pressure application plate 23 acts, it can drive the abutting shaft 11 to act, thereby forcing the valve plate 5 to separate from the inner conical surface 101 and perform a forced pressure relief action. And in the case where the valve rod 4 is stuck, giving it a certain movement force may eliminate this stuck phenomenon, that is, after giving the valve plate 5 a certain initial movement force, the pressure can instead drive the valve plate 5 to act, thereby performing a predetermined pressure relief action.

[0082] Based on the above settings, when the pressure relief valve fails, the valve plate 5 can be forced to open and perform a pressure relief action, avoiding the damage to the sealing performance of the oil tank caused by the continuous increase of the internal pressure of the oil tank. It can ensure that when the pressure relief valve cannot be normally opened due to a failure, through the linkage of the pressure sensor and the cylinder 18, the valve plate 5 is forced to open, thereby protecting the safety of the oil tank.

[0083] It should also be noted that under normal circumstances, the cylinder 18 is in a static state, and at this time the pressure application plate 23 will not move. When the internal pressure of the oil tank increases, the valve plate 5 moves actively, and the abutting shaft 11 can be driven to move away from the pressure application plate 23, that is, there is no interference between the normal opening and closing and the forced opening and closing of the valve plate 5, and the two control methods can coexist, ensuring the pressure relief effect of the pressure relief valve. This design not only improves the reliability of the system, but also reduces the maintenance cost and the difficulty of maintenance, further enhancing the economy and safety of the equipment.

[0084] As an embodiment of the present invention, a pressure relief method is also proposed, using the pressure relief valve for eliminating continuous pressure fluctuations, including:

[0085] During the starting or decelerating and stopping process of the oil tanker, high pressure is generated inside the oil tank. At this time, the high-pressure gas acts on the valve plate 5, causing the valve plate 5 to separate from the inner conical surface 101, thereby performing a pressure relief action. After the pressure relief action is completed, the embedded shaft 10 will enter the deceleration groove through the guiding groove, so that during the reset process of the valve plate 5, the speed is slowed down to continuously relieve the high pressure inside the oil tank;

[0086] When high pressure continues to be generated inside the oil tank and the valve plate 5 has no pressure relief action, the active control component acts and forcibly controls the valve plate 5 to separate from the inner conical surface 101 to perform a pressure relief action.

[0087] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claim.

[0088] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pressure relief valve for eliminating continuous pressure fluctuations, characterized in that, Comprising: A valve body, with a valve plate disposed inside the valve body; A hinge rod, rotatably connected to the valve plate, and an embedded shaft is provided at one end of the hinge rod away from the valve plate; A guide plate, fixedly installed inside the valve body, with a guide groove and a deceleration groove provided on the guide plate, and the embedded shaft can be guided from the guide groove into the deceleration groove; When the valve plate acts to complete the pressure relief action, the embedded shaft cooperates with the deceleration groove to slow down the reset speed of the valve plate; The guide groove includes a vertical groove provided on the guide plate, and a first inclined groove and a second inclined groove are provided near the end of the vertical groove; The guide groove further includes side connection grooves communicating with multiple groups of the vertical grooves and parallel to the second inclined groove, and the embedded shaft can enter the deceleration groove through the second inclined groove and the side connection grooves; A commutation structure is provided at the connection of the first inclined groove, the second inclined groove and the side connection grooves with the vertical groove, and the commutation structure can guide the embedded shaft to enter the second inclined groove or the side connection groove when moving in the reverse direction; The commutation structure includes a first switching member rotatably installed at the connection of the first inclined groove and the vertical groove, and a second switching member at the connections of the second inclined groove with the vertical groove and the side connection grooves with the vertical groove; The first switching member is parallel to the length direction of the first inclined groove, and the second switching member is parallel to the length direction of the vertical groove; The second inclined groove and multiple groups of side connection grooves are communicated with the deceleration groove at equal intervals; The deceleration groove includes multiple groups of sequentially connected flipping grooves, and the flipping groove includes a first arc groove and a second arc groove; The switching slope of the first arc groove and the second arc groove gradually increases from the bottom to the top.

2. The pressure relief valve for eliminating continuous pressure fluctuations according to claim 1, characterized in that, It further includes an extension part connected to one end of the valve body and an end cover covering the extension part. Multiple groups of convex blocks are provided on the circumferential side of the end cover, and the convex blocks are in contact with a convex ring provided inside the extension part; An annular groove is further provided inside the extension part, and a detachable locking ring is provided in the annular groove, and the locking ring is in contact with one end of the convex block away from the convex ring; 3. The pressure relief valve for eliminating continuous pressure fluctuations according to claim 2, characterized in that, A valve rod is fixedly installed on the valve plate, the valve rod is slidably connected to the end cover, and a cylindrical spring is sleeved on the valve rod. One end of the cylindrical spring is connected to the valve rod, and the other end is connected to the end cover; 4. The pressure relief valve for eliminating continuous pressure fluctuations according to claim 1, characterized in that, An inner conical surface is formed inside the valve body, and the inner conical surface is adapted to the valve plate; At least one sealing gasket is provided on one side of the valve plate adapted to the inner conical surface; 5. The pressure relief valve for eliminating continuous pressure fluctuations according to claim 1, characterized in that, A contact shaft coaxial with the embedded shaft is provided on the side of the hinge rod, and the contact shaft is connected to an active control component provided on the valve body; The active control component includes a rotating rod rotatably arranged through the valve body. A first connecting rod is provided at one end of the rotating rod, and a second connecting rod is provided at the other end. An engaging shaft is provided at one end of the second connecting rod away from its rotation center; The active control component further includes a pressing plate slidably arranged inside the valve body and in contact and adaptation with the contact shaft. A horizontal groove is provided along the length direction of the pressing plate, and the engaging shaft can slide in the horizontal groove; 6. A pressure relief method, characterized in that, Using the pressure relief valve for eliminating continuous pressure fluctuations as described in any one of claims 1 to 5, including: During the starting or decelerating and stopping process of the oil tanker, high pressure is generated inside the oil tank. At this time, the high-pressure gas acts on the valve plate, causing the valve plate to separate from the inner conical surface, thereby performing the pressure relief action. After the pressure relief action is completed, the embedded shaft will enter the deceleration groove through the guiding groove, so that during the resetting process of the valve plate, the speed is slowed down to continuously relieve the high pressure inside the oil tank; When high pressure continues to be generated inside the oil tank and the valve plate has no pressure relief action, the active control component acts and forcibly controls the valve plate to separate from the inner conical surface to perform the pressure relief action.

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