Elastic force and magnetic force double-control type anti-explosion pressure release valve

Abstract

The invention relates to the technical field of anti-explosion pressure release valves, and discloses an elastic force and magnetic force double-control type anti-explosion pressure release valve which comprises a body, a clamping spring is placed on the inner wall of the body, a limiting ring is detachably installed on the inner wall of the body, a guide rod is connected to the inner wall of the body in a clamped mode, and the limiting ring is detachably installed on the inner wall of the body. According to the elastic force and magnetic force double-control type anti-explosion pressure release valve, opening of the anti-explosion pressure release valve is controlled in a newly added magnetic force mode and an original elastic force control mode, the valve is opened when internal pressure reaches an elastic force control point, the piston is provided with a clamping structure to prevent the valve from being closed after the valve is opened, and when the elastic structure is clamped and cannot be opened, the valve is closed along with further increasing of the internal pressure. And when the temperature exceeds 310 DEG C and the Curie temperature of the magnetic material is exceeded, the piston on the valve can automatically fall off and be opened, the double-safety valve opening performance is achieved, two-stage pressure relief points are achieved, and the problem that an elastic structure is stuck can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof pressure relief valves, and in particular to an elastic-magnetic dual-control explosion-proof pressure relief valve. Background Art

[0002] An explosion-proof pressure relief valve is a safety device used to prevent equipment or systems from exploding or being damaged due to excessive internal pressure. However, existing pressure relief valves or explosion-proof valve technologies for power battery packs of automobiles and flying cars mostly use elastic pressure relief structures.

[0003] The pressure relief and explosion-proof valves in existing automobile and flying car technologies use an elastic-controlled structure. When the internal pressure of the battery pack exceeds the elastic force, the explosion-proof pressure relief valve opens to release the pressure. When the spring mechanism is stuck, the explosion-proof pressure relief valve cannot open normally, thereby damaging all electrochemical structures inside the battery pack, and the safety of opening the valve is limited. Summary of the invention

[0004] The object of the present invention is to provide an elastic-magnetic dual-control explosion-proof pressure relief valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an elastic magnetic double-control explosion-proof pressure relief valve, comprising a body, a retaining ring is placed on the inner wall of the body, a limit ring is detachably installed on the inner wall of the body, a guide rod is clamped on the inner wall of the body, and the body and the piston can be connected by setting the guide rod to play a connecting role, the retaining ring is clamped on the outer wall of the guide rod, and the stability of the guide rod can be improved by setting the retaining ring, a shell is fixedly installed on the bottom of the body, a spring is fixedly installed on the outer wall of the guide rod, and the end of the spring away from the guide rod is fixedly installed on the bottom of the body, and the piston can be fitted with a sealing ring by setting the spring, thereby improving the sealing effect of the piston, an inner sealing ring is fixedly installed on the top of the body, and the inner sealing ring is mainly used to seal between the piston and the body, an outer sealing ring is fixedly installed on the bottom of the body, and the outer sealing ring is mainly used to seal the body and the installation position of the power battery pack, a magnet is fixedly installed on the inner wall of the guide rod, and an iron sleeve is fixedly installed on the top of the magnet, and the magnet generates magnetic force to attract the iron When the battery pack or energy storage facility is in thermal runaway, the temperature will continue to rise. When the temperature reaches 310℃~350℃ or above, the magnetic material will lose its magnetism, so that after the piston falls off, the valve will open to release the pressure. A piston is fixedly installed on the top of the iron sleeve. When the air pressure reaches 2~20KPa and exceeds the force value of the elastic structure, the elastic structure opens the piston to release the pressure under the action of pressure. A breathable layer is fixedly installed on the top of the piston. The breathable layer is made of expanded polytetrafluoroethylene EPTFE. EPTFE is a polymer material. It is a polymer compound formed by polymerization of tetrafluoroethylene and has outstanding chemical stability and corrosion resistance. A pressure ring is fixedly installed on the top of the breathable layer. The breathable layer can be pressed by the pressure ring to improve the stability of the breathable layer. An iron sheet is fixedly installed on the top of the pressure ring. An upper cover is fixedly installed on the top of the iron sheet. An adjustment mechanism is provided on the body. By setting the adjustment mechanism, the body can be installed on power battery packs of different models and sizes, making the installation of the body more convenient.

[0006] Preferably, the adjustment mechanism includes a mounting block, which is slidably connected to the inner wall of the main body. A through hole is provided on the mounting block, and a bolt is passed through the through hole. The main body and the power battery pack of the automobile can be installed together with the mounting block, and the position of the through hole can be adjusted by sliding the mounting block, so that the main body can be installed on power battery packs of different models and sizes.

[0007] Preferably, a fixing ring is fixedly mounted on the outer wall of the mounting block, and the threaded rod can be connected to the mounting block by providing the fixing ring, so that the threaded rod can drive the mounting block to slide on the inner wall of the main body.

[0008] Preferably, the outer wall of the fixing ring is rotatably connected with a threaded rod, and the threaded rod is arranged to cooperate with the fixing ring to drive the mounting block to slide on the inner wall of the main body, so as to freely adjust the position of the mounting block.

[0009] Preferably, one end of the threaded rod away from the fixing ring passes through the body and a rotating rod is fixedly installed thereon, and the threaded rod can be rotated by the rotating rod, so that the threaded rod can rotate on the outer wall of the fixing ring.

[0010] Preferably, the threaded rod is threadedly connected to the through-portion of the body. The threaded rod is threadedly connected to the body so that the threaded rod can move along the inner wall of the body while rotating, and the threaded rod can cooperate with the fixing ring to drive the mounting block to slide along the inner wall of the body while moving.

[0011] Preferably, the guide rod is located inside the shell, the guide rod is hollow, the magnet and the iron sleeve are both arranged inside the guide rod, and the guide rod and the spring can be protected by providing the shell to prevent the spring from being hit and affecting its elasticity.

[0012] Preferably, the limiting ring is located at the top of the retaining spring. By providing the limiting ring, the retaining spring can be pressed tightly inside the body to prevent displacement of the retaining spring and improve the stability of the retaining spring.

[0013] Compared with the prior art, the present invention provides an elastic magnetic dual-control explosion-proof pressure relief valve, which has the following beneficial effects:

[0014] 1. The elastic magnetic double-control explosion-proof pressure relief valve adopts the newly added magnetic method and the original elastic control method to control the opening of the explosion-proof pressure relief valve. When the internal pressure reaches the elastic control point, the valve will be opened. After the valve is opened, the piston has a locking structure to prevent the valve from closing. When the elastic structure is stuck and the valve cannot be opened, as the internal pressure increases further, the magnetic structure will completely open the valve, and when the temperature exceeds 310°C, exceeding the Curie temperature of the magnetic material, the piston on the valve will automatically fall off and open. It has double insurance valve opening performance and two-stage pressure relief points, which can solve the problem of elastic structure jamming. In addition, the magnetism can be eliminated at a medium temperature of 310°C to ensure 100% valve opening, greatly improving the safety of chemical battery packs, protecting other battery facilities and personal safety, and having high economic benefits. At the same time, it has the original locking and ventilation functions, improving the opening safety of the explosion-proof pressure relief valve, ensuring that the valve is definitely opened, and can be used on flying cars with higher requirements for safety.

[0015] 2. The elastic magnetic dual-control explosion-proof pressure relief valve passes the bolt through the through hole and tightens it on the automobile power battery pack. At the same time, the main body and the automobile power battery pack can be installed with the mounting block. The threaded rod is rotated by the rotating rod. At the same time, the mounting block can be driven to slide on the inner wall of the main body with the fixing ring. The position of the through hole can be adjusted by sliding the mounting block. By adjusting the position of the through hole, the main body can adapt to automobile power batteries of different models and sizes, thereby improving the applicability of the main body and making it more flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 Schematic diagram of the explosion structure;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the guide rod of the present invention;

[0019] Figure 4 It is a schematic diagram of the overall structure of the regulating mechanism of the present invention.

[0020] In the figure: 1. outer shell; 2. spring; 3. guide rod; 4. outer sealing ring; 5. retaining ring; 6. limit ring; 7. main body; 8. inner sealing ring; 9. magnet; 10. iron sleeve; 11. piston; 12. breathable layer; 13. pressure ring; 14. iron sheet; 15. upper cover; 16. adjustment mechanism; 161. mounting block; 162. through hole; 163. fixing ring; 164. threaded rod; 165. rotating rod. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 4As shown, the present invention provides a technical solution: an elastic magnetic double-control explosion-proof pressure relief valve, including a body 7, the body 7 acts as a frame, the body 7 can be installed on the automotive power battery pack by using bolts passing through the through holes 162 and cooperating with the mounting block 161, a retaining spring 5 is placed on the inner wall of the body 7, and a limit ring 6 can be detachably installed on the inner wall of the body 7, the limit ring 6 is located on the top of the retaining spring 5, the limit ring 6 is used to press the retaining spring 5 to prevent the retaining spring 5 from popping out from the inside of the body 7, the inner wall of the body 7 is clamped with a guide rod 3, the guide rod 3 is used to connect the body 7 and the piston 11, and plays a connecting role, the outer wall of the guide rod 3 is provided with 1 to 4 retaining spring 5 clamping grooves, the guide rod 3 is located inside the shell 1, the retaining spring 5 is clamped on the outer wall of the guide rod 3, when the body 7 opens the valve, the retaining spring 5 can stabilize the guide rod Rod 3, prevent the valve from closing, the bottom of the body 7 is fixedly installed with a shell 1, the shell 1 can cover the spring 2, and then the spring 2 can be protected, the outer wall of the guide rod 3 is fixedly installed with a spring 2, the end of the spring 2 away from the guide rod 3 is fixedly installed at the bottom of the body 7, and the spring 2 provides elastic force to make the piston 11 fit the sealing ring, the top of the body 7 is fixedly installed with an inner sealing ring 8, the inner sealing ring 8 is mainly for the seal between the piston 11 and the body 7, the bottom of the body 7 is fixedly installed with an outer sealing ring 4, the outer sealing ring 4 can seal the body 7 and the installation part of the power battery pack, the inner wall of the guide rod 3 is fixedly installed with a magnet 9, the magnet 9 is a neodymium iron boron magnetic material, the diameter is 8 to 20 mm, the thickness is 2 to 20 mm, and the pre-charged magnetic strength is 2000 to 6000G s, the magnetic force is 6 to 50N, an iron sleeve 10 is fixedly installed on the top of the magnet 9, the iron sleeve 10 is a ferromagnetic material sleeve with a length of 5 to 18mm, and the iron sleeve 10 is attracted by the magnetic force generated by the magnet 9. When the battery pack or the energy storage facility is in thermal runaway, the temperature will continue to rise. When the temperature reaches 310°C to 350°C or above, the magnetic material will lose its magnetic force, so that the piston 11 will fall off, and the valve will open to release the pressure. The guide rod 3 is hollow, and the magnet 9 and the iron sleeve 10 are both arranged inside the guide rod 3. A piston 11 is fixedly installed on the top of the iron sleeve 10, and the piston 11 is used as a fitting sealing ring. When the body 7 opens the valve, the piston 11 is pushed away from the sealing ring by air pressure. The iron sleeve 10 is mainly used to connect the piston 11 and the magnet 9. When the internal space of the battery pack or the energy storage facility is gas-filled, the piston 11 is pushed away from the sealing ring by air pressure. The iron sleeve 10 is mainly used to connect the piston 11 and the magnet 9. In the process of increasing pressure due to gas generated by chemical batteries, when the air pressure reaches 2KPa~20KPa and exceeds the force value of the elastic structure, the elastic structure opens the piston 11 to release the pressure under the action of pressure, and has a locking structure to prevent the valve from closing due to pressure fluctuations after opening. When the elastic structure is stuck and fails, the air pressure reaches the force value of the elastic structure and the elastic structure cannot be opened. The pressure will further increase. When the air pressure reaches 10~30KPa and exceeds the force value of the magnetic structure, the piston 11 will also open to release the pressure. In this way, double insurance is achieved. When the valve is opened, it is pushed away from the sealing ring by the air pressure. A breathable layer 12 is fixedly installed on the top of the piston 11. The breathable layer 12 is mainly made of expanded polytetrafluoroethylene (EPTFE). A pressure ring 13 is fixedly installed on the top of the breathable layer 12.The pressure ring 13 is mainly used to press the air-permeable layer 12 to improve the stability of the air-permeable layer 12. An iron sheet 14 is fixedly installed on the top of the pressure ring 13. The iron sheet 14 is mainly used for sealing detection of the body 7. An upper cover 15 is fixedly installed on the top of the iron sheet 14. The gap between the upper cover 15 and the body 7 is perpendicular to the opening direction, which has an anti-stuck function. An adjustment mechanism 16 is provided on the body 7. By setting the adjustment mechanism 16, the body 7 can be installed on power battery packs of different models and sizes, improving the applicability of the body 7 and making it more convenient to install the body 7.

[0022] The above-mentioned adjustment mechanism 16 includes a mounting block 161, which is slidably connected to the inner wall of the main body 7. A through hole 162 is provided on the mounting block 161. The main body 7 can be installed on the automobile power battery pack by passing a bolt through the through hole 162 and tightening it on the automobile power battery pack. The position of the through hole 162 can be adjusted by sliding the mounting block 161, so that the main body 7 can adapt to automobile power battery packs of different sizes and models. A fixing ring 163 is fixedly installed on the outer wall of the mounting block 161, and a threaded rod 164 is rotatably connected to the outer wall of the fixing ring 163. The end of the threaded rod 164 away from the fixing ring 163 passes through the main body 7 to fix a rotating rod 165. The threaded rod 164 is threadedly connected to the penetration point of the main body 7. The threaded rod 164 is rotated by the rotating rod 165, and the mounting block 161 can be driven to slide on the inner wall of the main body 7 in cooperation with the fixing ring 163.

[0023] Working principle: When the main body 7 needs to be installed, the bolt is passed through the through hole 162 and tightened on the automobile power battery pack. When the through hole 162 deviates from the bolt hole on the automobile power pack, the threaded rod 164 is rotated by the rotating rod 165 to make the threaded rod 164 rotate on the outer wall of the fixing ring 163. Since the threaded rod 164 is threadedly connected to the main body 7, the threaded rod 164 will move on the inner wall of the main body 7 while rotating, and the threaded rod 164 will drive the fixing ring 163 to move synchronously while moving. When the fixing ring 163 moves, it will drive the mounting block 161 to slide on the inner wall of the main body 7. The position of the through hole 162 can be adjusted by sliding the mounting block 161, so that the through hole 162 and the bolt hole on the automobile power battery pack can be kept concentric, so that the main body 7 can be installed on the automobile power battery pack.

[0024] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An elastic magnetic dual-control explosion-proof pressure relief valve, comprising a body (7), characterized in that: A retaining ring (5) is placed on the inner wall of the body (7), a limiting ring (6) is detachably mounted on the inner wall of the body (7), a guide rod (3) is clamped on the inner wall of the body (7), the retaining ring (5) is clamped on the outer wall of the guide rod (3), a housing (1) is fixedly mounted on the bottom of the body (7), a spring (2) is fixedly mounted on the outer wall of the guide rod (3), one end of the spring (2) away from the guide rod (3) is fixedly mounted on the bottom of the body (7), an inner sealing ring (8) is fixedly mounted on the top of the body (7), and the bottom of the body (7) is fixedly mounted An outer sealing ring (4) is installed, a magnet (9) is fixedly installed on the inner wall of the guide rod (3), an iron sleeve (10) is fixedly installed on the top of the magnet (9), a piston (11) is fixedly installed on the top of the iron sleeve (10), a breathable layer (12) is fixedly installed on the top of the piston (11), a pressure ring (13) is fixedly installed on the top of the breathable layer (12), an iron sheet (14) is fixedly installed on the top of the pressure ring (13), an upper cover (15) is fixedly installed on the top of the iron sheet (14), and an adjustment mechanism (16) is arranged on the body (7).

2. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 1, characterized in that: The adjustment mechanism (16) comprises a mounting block (161), the mounting block (161) is slidably connected to the inner wall of the body (7), and a through hole (162) is provided on the mounting block (161).

3. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 2, characterized in that: A fixing ring (163) is fixedly mounted on the outer wall of the mounting block (161).

4. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 3, characterized in that: The outer wall of the fixing ring (163) is rotatably connected with a threaded rod (164).

5. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 4, characterized in that: One end of the threaded rod (164) away from the fixing ring (163) passes through the body (7) to fix the rotating rod (165).

6. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 5, characterized in that: The threaded rod (164) is threadedly connected to the penetration point of the body (7).

7. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 1, characterized in that: The guide rod (3) is located inside the housing (1); the guide rod (3) is hollow; the magnet (9) and the iron sleeve (10) are both arranged inside the guide rod (3).

8. The elastic-magnetic dual-control explosion-proof pressure relief valve according to claim 1, characterized in that: The limiting ring (6) is located on the top of the retaining ring (5).

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