Pressure relief valve and pressure relief method for eliminating continuous fluctuation of pressure intensity

Abstract

The invention relates to the technical field of pressure release valves, in particular to a pressure release valve capable of eliminating continuous fluctuation of pressure intensity and a pressure release method. The hinge rod is rotationally connected with the valve plate, and an embedded shaft is arranged at the end, away from the valve plate, of the hinge rod; the guide plate is fixedly installed in the valve body, a guide groove and a speed reduction groove are formed in the guide plate, and the embedded shaft can be guided into the speed reduction groove from the guide groove; when the valve plate acts to complete the pressure relief action, the embedded shaft is matched with the speed reduction groove, the reset speed of the valve plate can be slowed down, so that continuous pressure relief is achieved, the situation that the sealing performance is reduced due to continuous action of the valve plate is prevented, and durability is improved.

Description

Technical Field

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

[0002] A tanker truck is a vehicle specially used to transport liquid fuels such as gasoline and diesel. Its unique tank design enables it 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 a tanker truck starts or stops, the oil in the tank moves toward one side due to inertia, creating an impact force that instantly increases the pressure on one side of the tank. When the oil moves to one side of the tank, it will move in the opposite direction after the impact, instantly increasing the pressure on the other side of the tank. This shaking will cause the oil to impact back and forth in the tank, causing periodic pressure changes on the tank wall, instantly increasing the pressure inside the tank.

[0004] In order to eliminate the influence of the instantaneous pressure increase in the tank body on the tank body structure and sealing, existing oil tanks are provided with pressure relief valves. The working principle of the pressure relief valve is based on the pressure balance principle. When the pressure in the tank body exceeds the pressure value set by the pressure relief valve, the pressure relief valve will automatically open to release the excess pressure to protect the tank body and related components from damage; however, during the starting and stopping of the tank truck, the shaking degree of the internal oil body will gradually decrease periodically, and the pressure generated will also decrease periodically. After the pressure relief valve is opened, the pressure relief action can be completed in a short time. At this time, the valve will close quickly. However, the oil body in the tank body will still generate a certain pressure in the tank body due to inertia. The generation of this pressure will cause the pressure relief valve to open and close frequently, causing the components of the pressure relief valve such as springs, valve cores, valve stems, etc. to be subjected to repeated impact forces, resulting in fatigue damage to these components, shortening the service life of the valve, and even making the valve unable to open or close normally. Summary of the invention

[0005] The object of the present invention is to provide a pressure relief valve and a pressure relief method for eliminating continuous pressure fluctuations, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A pressure relief valve for eliminating continuous pressure fluctuations, comprising: A valve body, wherein the valve body has a built-in valve plate; A hinged rod, rotatably connected to the valve plate, wherein an end of the hinged rod away from the valve plate is provided with an embedded shaft; A guide plate, fixedly mounted inside the valve body, wherein a guide groove and a deceleration groove are provided on the guide plate, and the embedded shaft can be guided from the guide groove to the deceleration groove; When the valve plate moves to complete the pressure relief action, the embedded shaft cooperates with the deceleration groove to slow down the resetting speed of the valve plate.

[0007] As a further solution of the present invention: it also includes an extension portion connected to one end of the valve body and an end cover covering the extension portion, wherein a plurality of groups of protrusions are arranged on the circumferential side of the end cover, and the protrusions abut against a protruding ring arranged on the inner side of the extension portion; An annular groove is also provided in the extension portion, a detachable locking ring is provided in the annular groove, and the locking ring abuts against an end of the protrusion away from the protruding ring.

[0008] As a further solution of the present invention: a valve stem is fixedly installed on the valve plate, the valve stem is slidably connected to the end cover, and a columnar spring is sleeved on the valve stem, one end of the columnar spring is connected to the valve stem, and the other end is connected to the end cover.

[0009] 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; At least one sealing gasket is arranged on one side of the valve plate that matches the inner conical surface.

[0010] As a further solution of the present invention: the guide groove comprises a vertical groove arranged on the guide plate, and the vertical groove is provided with a first inclined groove and a second inclined groove near its end; The guide groove further includes a side connecting groove that is connected to the plurality of groups of the vertical grooves and is parallel to the second inclined groove, and the embedded shaft can enter the deceleration groove through the second inclined groove and the side connecting groove; A reversing structure is provided at the connection between the first inclined groove, the second inclined groove and the side connecting groove and the vertical groove, and the reversing structure can guide the embedded shaft to enter the second inclined groove or the side connecting groove when moving in the reverse direction.

[0011] As a further solution of the present invention: the reversing structure includes a first switching member rotatably mounted at the connection between the first inclined slot and the vertical slot, and a second switching member at the connection between the second inclined slot and the vertical slot and the side connecting slot and the vertical slot; The first switching member is parallel to the length direction of the first inclined slot, and the second switching member is parallel to the length direction of the vertical slot.

[0012] 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; 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.

[0013] 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; 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; 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.

[0014] A pressure relief method, using the pressure relief valve for eliminating continuous pressure fluctuations, comprises: 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. 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 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. By setting up an active control component, when the pressure relief valve fails, the valve plate can be forced to open and the pressure relief action can be performed to prevent the pressure in the oil tank from continuing to increase and causing damage to the sealing of the oil tank. It can ensure that when the pressure relief valve cannot be opened normally due to a failure, the valve plate can be forced to open through the linkage of the pressure sensor and the cylinder, thereby protecting the safety of the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0017] Figure 2 A schematic structural diagram from another angle of an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0018] Figure 3 A disassembled view of an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0019] Figure 4 A schematic diagram of the structure inside the valve body of an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0020] Figure 5 A cross-sectional view of a valve body in one embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0021] Figure 6 A schematic structural diagram of a valve plate, a hinged rod and a guide plate in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0022] Figure 7 A schematic diagram of the structure of an articulated rod and an embedded shaft in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0023] Figure 8 A schematic diagram of the structure of a guide groove and a deceleration groove in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0024] Fig. 9 A schematic diagram of the structure of an active control component in an embodiment of a pressure relief valve for eliminating continuous pressure fluctuations.

[0025] In the figure: 1. valve body; 101. inner cone; 2. extension part; 201. convex ring; 202. annular groove; 3. end cover; 301. convex block; 4. valve stem; 5. valve plate; 6. spring; 7. locking ring; 8. sealing gasket; 9. hinged rod; 10. embedded shaft; 11. abutment 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 connecting groove; 16. first switching member; 17. second switching member; 18. cylinder; 19. first connecting rod; 20. rotating rod; 21. second connecting rod; 22. engaging shaft; 23. pressure plate; 2301. horizontal groove; 24. guide member. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0027] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0028] See also Figure 1 to Figure 9 In an embodiment of the present invention, a pressure relief valve for eliminating continuous pressure fluctuations includes: a valve body 1, a hinged rod 9, and a guide plate 12.

[0029] The valve body 1 has a built-in valve plate 5. Specifically, an extension portion 2 is provided at one end of the valve body 1. An end cover 3 matching the extension portion 2 is provided on the extension portion 2. A plurality of groups of protrusions 301 are provided on the circumferential side of the end cover 3. The protrusions 301 abut against a protruding ring 201 provided on the inner side of the extension portion 2. The extension portion 2 is further provided with an annular groove 202, and a detachable locking ring 7 is provided in the annular groove 202, and the locking ring 7 abuts against an end of the convex block 301 away from the convex ring 201; During the valve body assembly process, the end cover 3 is first placed in the extension part 2, and the protrusion 301 on the end cover 3 is abutted against the protruding ring 201 on the inner wall of the extension part 2, wherein the protrusion 301 is inclined toward the side of the protruding ring 201 and away from the end cover 3. When the end cover 3 is placed toward the extension part 2, the inclined portion abuts against the end of the extension part 2 away 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.

[0030] The locking ring 7 is a non-completely closed circular structure, that is, an opening is provided on the locking ring 7. When the end cover 3 is installed in place, the circumferential radius of the locking ring 7 can be reduced by squeezing the two sides of the locking ring 7, so that it can be more conveniently placed in the extension part 2. When the locking ring 7 enters the extension part 2 and moves to the position of the annular groove 202, the locking ring 7 releases the compressed force and actively embeds into the annular groove 202. At this time, the locking ring 7 can abut against the end of the protrusion 301 away from the protrusion 201, thereby realizing the restriction of the protrusion 301 and completing the fixation of the end cover 3. This fixing method is not only easy to operate, but also reliable in connection, thereby ensuring that the end cover 3 will not loosen during use.

[0031] Through the above arrangement, 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 parts inside the valve body 1 are damaged, maintenance personnel do not need to disassemble the entire valve body. They only need to remove the end cover 3 through simple operations to replace or repair the damaged parts. This not only reduces the difficulty of maintenance and shortens the maintenance time, but also reduces the economic losses caused by long-term downtime, effectively reducing the cost of equipment use.

[0032] Furthermore, the extension portion 2 is provided with a small hole along its radial direction, and the small hole can extend into the annular groove 202. When the end cover 3 needs to be removed, a sharp object is inserted into the small hole, which can drive the locking ring 7 to deform, thereby separating from the annular groove 202, thereby realizing the removal of the end cover 3. This design makes the disassembly process more convenient, and the end cover 3 can be quickly removed without using complicated tools, further improving the maintenance efficiency and ensuring the normal operation of the equipment.

[0033] Further, a valve stem 4 is fixedly mounted on the valve plate 5, the valve stem 4 is slidably connected to the end cover 3, and a cylindrical spring 6 is sleeved on the valve stem 4, one end of the cylindrical spring 6 is connected to the valve stem 4, and the other end is connected to the end cover 3, and 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; At least one sealing gasket 8 is disposed on a side of the valve plate 5 that matches the inner conical surface 101 .

[0034] In the initial state, the cylindrical spring 6 is in a stretched state, applying a continuous pulling force to the valve stem 4, which makes the valve plate 5 tend to move toward the inner conical surface 101, ensuring that the valve plate 5 is in close contact with the inner conical surface 101. A sealing gasket 8 is provided on the valve plate 5. When the valve plate 5 is in contact with the inner conical surface 101, the sealing gasket 8 is squeezed and deformed to fill the tiny gap between the valve plate 5 and the inner conical surface 101, thereby achieving a good sealing effect.

[0035] 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 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 fitting surfaces of the two are more uniform, which further improves 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.

[0036] The above-mentioned 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 cone 101, thereby achieving rapid pressure relief and effectively protecting the system safety. After the pressure relief, the system pressure returns to normal, and the cylindrical spring 6 again makes the valve plate 5 fit tightly against the inner cone 101 to restore the sealing state. The entire process does not require human intervention, and the valve can automatically complete the pressure relief and sealing actions, thereby improving the system's degree of automation and operating efficiency.

[0037] In addition, the structure is also convenient for maintenance and overhaul. If the sealing gasket 8 or other parts need to be replaced, the valve plate 5 only needs to be slid out of the end cover 3 for maintenance or replacement. This design not only reduces the difficulty of maintenance, but also shortens the maintenance time, reduces the downtime loss caused by maintenance, and improves the availability and economy of the equipment.

[0038] See also Figure 6~Figure 8 The hinged rod 9 is rotatably connected to the valve plate 5, and an embedded shaft 10 is provided at one end of the hinged rod 9 away from the valve plate 5; The guide plate 12 is fixedly installed inside the valve body 1, and a guide groove and a deceleration groove are provided on the guide plate 12, and the embedded shaft 10 can be guided from the guide groove to the deceleration groove; When the valve plate 5 moves to complete the pressure relief action, the embedded shaft 10 cooperates with the deceleration groove to slow down the return speed of the valve plate 5 .

[0039] In this embodiment, when high pressure is generated in the oil tank, the high-pressure gas will act on the valve plate 5, causing the valve plate 5 to overcome the pulling force of the columnar spring 6 and move away from the inner conical surface 101. During the movement, the valve plate 5 will drive the hinged rod 9 connected thereto to move, thereby causing the embedded shaft 10 to move along the guide 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 in the oil tank and protecting the oil tank body from damage due to high pressure.

[0040] When the pressure relief is completed, the tension of the columnar spring 6 will drive the valve plate 5 to reset. During the resetting process, the embedded shaft 10 will enter the deceleration groove and decelerate under the action of the deceleration groove, which can slow down the resetting speed of the valve plate 5, and avoid the valve plate 5 continuously moving due to the continuous shaking of the oil body due to inertia after the valve plate 5 is quickly reset, thereby reducing the action frequency of the valve plate 5, effectively reducing unnecessary wear of components in the valve body 1, and improving the durability and stability of the pressure relief valve.

[0041] Based on the above structure, especially when the tanker truck is starting or stopping, high pressure is easily generated in the tank due to the shaking of the oil body. The pressure relief valve can timely relieve this part of the high pressure to ensure the safe operation of the tanker truck. At the same time, the slow resetting of the valve plate 5 can continue to relieve the subsequent high pressure generated by the inertial shaking of the oil body, further enhancing the safety of the system.

[0042] The guide groove comprises a vertical groove 1201 provided on the guide plate 12, and the vertical groove 1201 is provided with a first inclined groove 14 and a second inclined groove 15 near its end; The guide groove further includes a side connecting groove 1501 which is connected to the plurality of groups of vertical grooves 1201 and is parallel to the second inclined groove 15, and the embedded shaft 10 can enter the deceleration groove through the second inclined groove 15 and the side connecting groove 1501; A reversing structure is provided at the connection between the first inclined groove 14, the second inclined groove 15, the side connecting groove 1501 and the vertical groove 1201, and the reversing structure can guide the embedded shaft 10 to enter the second inclined groove 15 or the side connecting groove 1501 when moving in the reverse direction. The reversing structure includes a first switching member 16 rotatably installed at the connection between the first inclined groove 14 and the vertical groove 1201, and a second switching member 17 rotatably installed at the connection between the second inclined groove 15 and the vertical groove 1201, and the side connecting groove 1501 and the vertical groove 1201. It should be noted that a torsion spring is provided on the rotating shaft of the first switching member 16 and the second switching member 17; The first switching member 16 is parallel to the length direction of the first inclined slot 14 , and the second switching member 17 is parallel to the length direction of the vertical slot 1201 .

[0043] In this embodiment, when the valve plate 5 drives the hinged rod 9 to move along the vertical groove 1201, a pressure relief action can be performed. At the same time, according to the size 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 hinged rod 9 is different. Specifically, when the oil in the oil tank shakes more, the pressure generated is also greater. At this time, when the pressure acts on the valve plate 5, the movement 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.

[0044] Based on the uncertainty of the movement 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 separate from the second switching member 17, under the action of the torsion spring, the second switching member 17 can be reset. Then the movement of the embedded shaft 10 will continue to move or reverse 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 connecting groove 1501 and enter the deceleration groove, so that the valve plate 5 is slowly reset. When the embedded shaft 10 continues to move, it will also abut against the second switching member 17 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 a different side connecting groove 1501.

[0045] In particular, when the oil in the oil tank sways to a greater extent, the pressure generated is greater, and the distance that the embedded shaft 10 moves following the valve plate 5 is also longer. At this time, when the valve plate 5 and the embedded shaft 10 move in the reverse direction, the distance they move in the deceleration groove is longer, so that the reset time of the valve plate 5 is longer. When the oil sways to a greater extent, the time it continues to sway 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 degree of oil sway is achieved, ensuring the pressure relief effect.

[0046] Furthermore, when the valve plate 5 is reset, the embedded shaft 10 can abut against the first switching member 16 and deflect it. After 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 is reset under the action of the torsion spring.

[0047] The second inclined groove 15 and the plurality of side connecting grooves 1501 are connected to the deceleration groove at equal intervals; The deceleration groove includes a plurality of groups of reversal grooves 13 connected in sequence, and the reversal groove 13 includes a first arc groove 1301 and a second arc groove 1302 .

[0048] In this embodiment, when the valve plate 5 drives the hinged rod 9 to move along the vertical groove 1201, it will perform different degrees of pressure relief actions according to the size of the high pressure generated in the oil tank. Specifically, the greater the degree of oil shaking in the oil tank, the greater the pressure generated, and the longer the distance the valve plate 5 moves under the action of pressure, thereby driving the embedded shaft 10 to move along the vertical groove 1201. The longer the distance; otherwise, the shorter it is.

[0049] When the embedded shaft 10 enters the deceleration groove from the side connecting groove 1501 or the second inclined groove 15, the embedded shaft 10 will swing back and forth in the deceleration groove. This swinging method can effectively reduce the speed of the embedded shaft 10 moving toward the first inclined groove 14, thereby extending the reset time of the valve plate 5 and allowing the pressure relief valve to continue to relieve pressure for a longer time.

[0050] For more details, see Figure 8 The switching slope of the first arc groove 1301 and the second arc groove 1302 gradually increases from bottom to 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 allows the embedded shaft 10 to have a gradual acceleration process when it moves to the turning point of reciprocating swing. In the process of continuous reciprocating swing, 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 longer pressure relief action.

[0051] Based on the above settings, the movement distance and reset time of the valve plate 5 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 5, frequent opening and closing due to oil shaking can be avoided, the action frequency of the valve plate 5 can be reduced, the wear of internal components 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 level of the system, reduces maintenance costs and repair difficulty, and further improves the economy and reliability of the equipment.

[0052] See also Figure 1 , Figure 2 , Fig. 9 , the side of the hinged rod 9 is provided with an abutment shaft 11 coaxial with the embedded shaft 10, and the abutment shaft 11 is connected to the active control component provided on the valve body 1; The active control assembly includes a rotating rod 20 that is rotatably arranged through the valve body 1, a first connecting rod 19 is arranged at one end of the rotating rod 20, and a second connecting rod 21 is arranged at the other end, a fitting shaft 22 is arranged at one end of the second connecting rod 21 away from the rotation center thereof, and the second connecting rod 21 is rotatably connected to a cylinder 18 arranged outside the valve body 1; The active control component also includes a pressure plate 23 that is slidably disposed in the valve body 1 and abuts against the abutment shaft 11, wherein the pressure plate 23 is provided with a transverse groove 2301 along its length direction, and the engaging shaft 22 can slide in the transverse groove 2301, wherein the pressure plate 23 is slidably connected to a guide member 24 disposed in the valve body 1.

[0053] In this embodiment, when the pressure relief valve fails and the valve plate 5 cannot be opened actively due to a fault and when the pressure reaches a preset value, the pressure sensor arranged on the oil tank is activated by 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 engaging shaft 22 will make a circular motion and drive the movement of the pressure plate 23 in cooperation with the transverse groove 2301. In the initial state, the pressure plate 23 is in a state of abutment with the abutment shaft 11, so that when the pressure plate 23 moves, it can drive the abutment shaft 11 to move, thereby forcing the valve plate 5 to separate from the inner cone 101 and perform a forced pressure relief action. In the case that the valve stem 4 is stuck, giving it a certain kinetic force may eliminate the jamming phenomenon, that is, after giving the valve plate 5 a certain initial kinetic force, the pressure can drive the valve plate 5 to move, thereby performing the predetermined pressure relief action.

[0054] Based on the above arrangement, when the pressure relief valve fails, the valve plate 5 can be forced to open and perform the pressure relief action to prevent the pressure in the oil tank from continuing to increase and causing damage to the sealing of the oil tank. It can ensure that when the pressure relief valve cannot be opened normally due to a failure, the valve plate 5 can be forced to open through the linkage of the pressure sensor and the cylinder 18, thereby protecting the safety of the oil tank.

[0055] It should also be noted that, under normal circumstances, the cylinder 18 is in a stationary state, and the pressure plate 23 does not move. When the pressure in the oil tank increases, the valve plate 5 actively moves, which can cause the abutment shaft 11 to move away from the pressure plate 23. That is, there is no interference between the normal opening and closing of the valve plate 5 and the forced opening and closing. The two control methods can coexist with each other to ensure the pressure relief effect of the pressure relief valve. This design not only improves the reliability of the system, but also reduces maintenance costs and repair difficulties, further improving the economy and safety of the equipment.

[0056] As an embodiment of the present invention, a pressure relief method is also proposed, using the pressure relief valve for eliminating continuous pressure fluctuations, comprising: 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 5, causing the valve plate 5 to separate from the inner cone 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 guide groove, causing the valve plate 5 to slow down during the resetting process, so as to continuously relieve the high pressure in the tank. When high pressure continues to be generated in the oil tank and the valve plate 5 does not perform pressure relief, the active control component is activated and the control valve plate 5 is forced to separate from the inner conical surface 101 to perform pressure relief.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0058] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pressure relief valve for eliminating continuous pressure fluctuations, characterized in that: include: A valve body, wherein the valve body has a built-in valve plate; A hinged rod is rotatably connected to the valve plate, and an embedded shaft is provided at one end of the hinged rod away from the valve plate; a guide plate is fixedly installed inside the valve body, and a guide groove and a deceleration groove are provided on the guide plate, and the embedded shaft can be guided by the guide groove into the deceleration groove; when the valve plate moves to complete the pressure relief action, the embedded shaft cooperates with the deceleration groove to slow down the resetting speed of the valve plate.

2. A pressure relief valve for eliminating continuous pressure fluctuations according to claim 1, characterized in that: It also includes an extension portion connected to one end of the valve body and an end cover covering the extension portion, wherein a plurality of groups of protrusions are arranged on the circumferential side portion of the end cover, and the protrusions abut against a protruding ring arranged on the inner side of the extension portion; an annular groove is also arranged in the extension portion, and a detachable locking ring is arranged in the annular groove, and the locking ring abuts against one end of the protrusion away from the protruding ring.

3. A pressure relief valve for eliminating continuous pressure fluctuations according to claim 2, characterized in that: A valve stem is fixedly mounted on the valve plate, the valve stem is slidably connected to the end cover, and a columnar spring is sleeved on the valve stem, one end of the columnar spring is connected to the valve stem, and the other end is connected to the end cover.

4. A 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 matched with the valve plate; at least one sealing gasket is arranged on a side of the valve plate that is matched with the inner conical surface.

5. A pressure relief valve for eliminating continuous pressure fluctuations according to claim 1, characterized in that: The guide groove includes a vertical groove arranged on the guide plate, and the vertical groove is provided with a first inclined groove and a second inclined groove near its end; the guide groove also includes a side connecting groove connected 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 connecting groove; a reversing structure is provided at the connection between the first inclined groove, the second inclined groove and the side connecting groove and the vertical groove, and the reversing structure can guide the embedded shaft to enter the second inclined groove or the side connecting groove when it moves in the opposite direction.

6. A pressure relief valve for eliminating continuous pressure fluctuations according to claim 5, characterized in that: The reversing structure includes a first switching member rotatably installed at the connection between the first inclined groove and the vertical groove, and a second switching member at the connection between the second inclined groove and the vertical groove and the side connecting groove and 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.

7. A pressure relief valve for eliminating continuous pressure fluctuations according to claim 5, characterized in that: The second inclined groove and multiple groups of side connecting grooves are connected to the deceleration groove at equal intervals; the deceleration groove includes multiple groups of reversing grooves connected in sequence, and the reversing groove includes a first arc groove and a second arc groove.

8. A pressure relief valve for eliminating continuous pressure fluctuations according to claim 1, characterized in that: A contact shaft coaxial with the embedded shaft is arranged on the side of the hinged rod, and the contact shaft is connected to an active control component arranged on the valve body; the active control component includes a rotating rod rotatably arranged through the valve body, a first connecting rod is arranged at one end of the rotating rod, and a second connecting rod is arranged at the other end, and an engaging shaft is arranged at an end of the second connecting rod away from its rotation center; the active control component also includes a pressure plate slidably arranged in the valve body and abutted against the contact shaft, the pressure plate is provided with a transverse groove along its length direction, and the engaging shaft can slide in the transverse groove.

9. A pressure relief method, characterized in that: The use of a pressure relief valve for eliminating continuous pressure fluctuations as described in any one of claims 1 to 8 comprises: during the process of starting or decelerating to stop a tanker truck, high pressure is generated in the oil tank, at which time the high-pressure gas acts on the valve plate to separate the valve plate from the inner conical 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 oil tank; when high pressure is continuously generated in the oil tank and the valve plate has no pressure relief action, the active control component is actuated, and the control valve plate is forced to separate from the inner conical surface to perform a pressure relief action.

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