A bidirectional valve and explosion-proof valve

Abstract

This utility model relates to the field of valve technology, and in particular to a two-way valve and an explosion-proof valve. The two-way valve provided by this utility model includes a housing and a fixed base forming an air exchange channel, and a first movable member and a second movable member. At least a portion of the first movable member passes through the second movable member and extends into the fixed base. The first movable member is axially movable relative to the second movable member and the fixed base. When the first movable member moves in a first direction, the air outlet channel communicates with a first gap. When the first movable member pushes the second movable member to move in a second direction, the air inlet channel communicates with the first gap. The movement of the first movable member within the air exchange channel forms separate air outlet and air inlet channels, precisely controlling the airflow direction, avoiding turbulence and backflow, improving exhaust efficiency, and adapting to airflow pressure requirements in different directions.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a two-way valve and an explosion-proof valve. Background Technology

[0002] In the field of new energy batteries and energy storage equipment, the enclosures of battery packs and energy storage devices must meet the requirements of a completely sealed design to prevent damage from external dust, liquids, and other impurities. However, temperature changes occur during the charging and discharging of battery cells, causing the gas inside the enclosure to expand and contract, resulting in an imbalance of pressure between the inside and outside of the enclosure. Long-term pressure difference can damage the sealing performance of the enclosure, so a pressure difference balancing mechanism is required.

[0003] Existing differential pressure balancing solutions on the market typically use the same airflow exchange channel for both air intake and exhaust. With air intake and exhaust in the same channel, it is difficult to accurately control the airflow direction, which can easily lead to airflow turbulence or backflow. Excessive moisture can be introduced during intake, increasing the risk of condensation inside the chamber. During exhaust, residual media in the channel may affect exhaust efficiency, and the opening and closing of a single channel is slow to respond, making it difficult to adapt to the pressure requirements of airflow in different directions. Utility Model Content

[0004] To address the problem that existing two-way valves use the same airflow channel for both air outlet and inlet, this invention provides a two-way valve and an explosion-proof valve.

[0005] The present invention provides a two-way valve, comprising a housing and a fixed base fixedly connected to one end of the housing. The inner wall of the housing and the fixed base together form a ventilation channel. The two-way valve includes a first movable member and a second movable member sequentially disposed within the ventilation channel. At least a portion of the first movable member passes through the second movable member and extends into the fixed base. The first movable member is axially movable relative to the second movable member and the fixed base. A first gap is provided between the first movable member and the inner wall of the housing. When the first movable member moves along a first direction, an air outlet channel is formed between the first movable member and the second movable member, and the air outlet channel communicates with the first gap. When the first movable member moves along a second direction opposite to the first direction, the first movable member pushes the second movable member to move along the second direction. An air inlet channel is formed between the top surface of the second movable member and the inner wall of the housing, and the air inlet channel communicates with the first gap.

[0006] Preferably, the fixed base is provided with a first through hole corresponding to the first movable member, and at least a portion of the first movable member passes through the second movable member and extends into the first through hole; when the first movable member moves along the first direction, the first gap, the air outlet channel and the through hole are connected; a second gap is provided between the side wall of the second movable member and the inner wall of the housing, and when the first movable member moves along the second direction, the first gap, the air inlet channel, the second gap and the first through hole are connected in sequence.

[0007] Preferably, a third through hole is provided on the side of the housing opposite to the fixed base, corresponding to the first through hole, and the first movable member and the second movable member cooperate to seal the third through hole.

[0008] Preferably, the bidirectional valve further includes a limiting member disposed within the fixed seat, wherein at least a portion of the first movable member passes through the second movable member and extends into the through hole to connect with the limiting member.

[0009] Preferably, the second movable member is provided with a second through hole corresponding to the first through hole, the second through hole is connected to the first through hole, and the two-way valve includes a first elastic member disposed in the second through hole and the first through hole. The first elastic member is sleeved on the first movable member, and the two ends of the first elastic member respectively abut against the second movable member and the limiting member.

[0010] Preferably, the bidirectional valve includes a second elastic member sleeved on the outside of the second movable member, with the two ends of the second elastic member respectively abutting against the second movable member and the fixed seat.

[0011] Preferably, a third gap is provided between the second movable member and the fixed base. When the first movable member pushes the second movable member to move along the second direction, the first gap, the air intake channel, the second gap and the third gap are connected in sequence.

[0012] This utility model also provides an explosion-proof valve, including a main body and a two-way valve as described above. The main body includes a cover rotatably connected to the main body. The main body is provided with a pressure relief channel, and the cover blocks the pressure relief channel. The cover is provided with a first vent hole, and the two-way valve is provided corresponding to the first vent hole.

[0013] Preferably, the cover is provided with a breathable component corresponding to the first ventilation hole.

[0014] Preferably, the main body includes a valve body rotatably connected to the cover, the pressure relief channel is disposed on the valve body, the first vent is disposed on the cover, the cover is provided with a second vent, and the first vent and the second vent are spaced apart on the cover.

[0015] Compared with the prior art, the bidirectional valve and explosion-proof valve provided by this utility model have the following advantages: 1. The bidirectional valve provided in this embodiment of the utility model has a housing and a fixed base forming an air exchange channel. A first movable member and a second movable member are sequentially arranged in the air exchange channel. The first movable member can move along its own axial direction and forms a first gap with the inner wall of the housing. When air is discharged, the first movable member moves along a first direction, forming an air discharge channel with the second movable member and connecting with the first gap, providing a flow path for airflow and realizing directional air discharge. When air is inlet, the first movable member moves along a second direction and pushes the second movable member, so that the second movable member forms an air inlet channel with the inner wall of the housing and connects with the first gap, realizing directional air inlet. The second movable member and the first movable member move in coordination to form separate air discharge channels and air inlet channels. The directional separation of air discharge and air inlet precisely controls the airflow direction, avoids turbulence and backflow, effectively reduces the amount of water vapor carried in during air inlet, and ensures smooth airflow during air discharge, improving exhaust efficiency, adapting to the airflow pressure requirements of different directions, and improving the accuracy and stability of pressure difference balance.

[0016] 2. In the bidirectional valve provided in this embodiment, the first through hole of the fixed seat provides a moving guide for the first movable member and forms an airflow path; the first movable member passes through the first through hole and moves within the first through hole. By cooperating with the second movable member, when moving in the first direction, the first gap, the air outlet channel and the first through hole are connected. The first through hole is connected to the interior of the bidirectional valve sealing body, thereby realizing air outlet; the second gap between the second movable member and the inner wall of the housing, when the first movable member moves in the second direction, makes the first gap, the air inlet channel, the second gap and the first through hole connected in sequence to form an independent air inlet path. The airflow direction during air inlet is clearly defined in the second gap, forming a positional distinction with the air outlet channel, strengthening the separation of the air inlet channel and the air outlet channel, improving the airflow direction control accuracy, reducing water vapor carry-in, and enhancing working stability.

[0017] 3. In the embodiment of this utility model, the third through hole of the two-way valve is located on the side of the housing away from the fixed seat, corresponding to the first through hole and the second through hole. When the first movable part moves to the unsealed state, the third through hole can be used as an airflow inlet and outlet to cooperate with other channels to expand the airflow path. When the first movable part is reset to the sealed state, the first movable part blocks the airflow entering from the direction of the third through hole, ensuring that the air inlet channel and the air outlet channel are accurately closed.

[0018] 4. In the embodiment of this utility model, the two-way valve has a limiting member disposed in the fixed seat and connected to the first movable member extending to the first through hole. This limits the axial movement range of the first movable member, preventing it from displacing excessively and leaving the preset working position when moving along the first or second direction. The limiting member constrains the movement stroke of the first movable member, which can stabilize the formation state of the air outlet channel and the air inlet channel and ensure the reliability of the airflow path.

[0019] 5. In the bidirectional valve provided in this embodiment of the present invention, a first elastic element is sleeved on a first movable element, with its two ends respectively abutting against a second movable element and a limiting element, providing an elastic restoring force. When the first movable element moves along a first direction, the first elastic element is compressed and accumulates elastic potential energy. After the driving force disappears, it can pull the first movable element back to its original position, ensuring that the air outlet channel is closed in a timely manner. At the same time, by continuously abutting, the elastic element can maintain the stability of the fit between the first and second movable elements, reducing component loosening caused by vibration, etc., and ensuring the reliability of the formation and closure of the airflow channel.

[0020] 6. In the bidirectional valve provided in this embodiment of the utility model, the second elastic element is sleeved on the outside of the second movable element, with its two ends respectively abutting against the second movable element and the fixed seat, providing an independent elastic restoring force for the second movable element. When the first movable element pushes the second movable element to move along the second direction, the second elastic element is compressed and stores potential energy. After the driving force is released, it can independently drive the second movable element and the first movable element to reset, ensuring precise closure of the air intake channel.

[0021] 7. In the embodiment of this utility model, the third gap of the two-way valve is set between the second movable member and the fixed seat. The third gap is formed when the first movable member pushes the second movable member to move in the second direction. It is a transition channel for the intake airflow to the first through hole, ensuring that the intake process is unobstructed. At the same time, the third gap avoids direct rigid contact between the second movable member and the inner wall of the fixed seat when the second movable member moves, reducing component wear. It can also assist in controlling the intake flow rate by preset the size of the third gap.

[0022] 8. The second embodiment of this utility model provides an explosion-proof valve. The main body is the basic structure of the explosion-proof valve, providing installation support for the cover and the two-way valve. The rotatable cover normally blocks the pressure relief channel, forming a seal. When one side is overpressurized, the cover rotates to open the pressure relief channel, providing a path for the overpressurized gas to escape, preventing excessive pressure from causing danger, and achieving a safe pressure relief function. The first vent is correspondingly set with the two-way valve, allowing the two-way valve to exchange airflow with the external environment through the first vent. This maintains normal air pressure balance and prevents excessive moisture from being introduced during air intake. The cover and the two-way valve work together to take into account both explosion-proof pressure relief and ventilation functions, improving the safety and reliability of the explosion-proof valve.

[0023] 8. The two-way valve provided in this embodiment of the utility model has a ventilated component on the cover that works in conjunction with the first vent of the valve body to enhance gas exchange efficiency. The ventilated component adopts a porous structure to allow air to pass through, and works in conjunction with the first vent to ensure normal ventilation and maintain air pressure balance. At the same time, the ventilated component has waterproof properties to block water vapor and liquid intrusion, and avoid condensation inside the box or damage to components due to moisture.

[0024] 10. In the embodiment of this utility model, the explosion-proof valve has a rotating connection between the valve body and the cover to ensure that the pressure relief channel can be opened and closed flexibly. The first vent and the second vent are spaced apart on the cover to separate the air exchange and pressure relief airflow paths of the bidirectional valve and avoid mutual interference. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional model schematic diagram of the bidirectional valve provided in the first embodiment of this utility model.

[0027] Figure 2 This is an exploded schematic diagram of the bidirectional valve provided in the first embodiment of this utility model.

[0028] Figure 3 This is a cross-sectional schematic diagram of the two-way valve provided in the first embodiment of this utility model.

[0029] Figure 4 This is a cross-sectional schematic diagram of the two-way valve in the air outlet state provided in the first embodiment of this utility model.

[0030] Figure 5 This is a cross-sectional schematic diagram of the two-way valve in the air intake state provided in the first embodiment of this utility model.

[0031] Figure 6 This is a schematic diagram of a three-dimensional model of the explosion-proof valve in the open state provided in the second embodiment of this utility model.

[0032] Figure 7 This is a cross-sectional schematic diagram of the explosion-proof valve in the open state provided in the second embodiment of this utility model.

[0033] Explanation of reference numerals in the attached diagram: 100. Two-way valve; 200. Explosion-proof valve; 201. Main body; 202. Pressure relief channel; 1. Housing; 2. Fixing base; 3. First movable component; 4. Second movable component; 5. Limiting component; 6. First elastic component; 7. Second elastic component; 8. Cover; 9. Valve body; 10. Ventilation passage; 11. First gap; 12. Exhaust passage; 13. Intake passage; 14. Step; 15. Third through hole; 21. First through hole; 22. Third gap; 31. Piston head; 32. Piston rod; 41. Second gap; 42. Top surface; 43. Second through hole; 81. Ventilation assembly; 82. First ventilation hole; 83. Second ventilation hole; 84. Rotating shaft; 85. Torsion spring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0035] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0036] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0037] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0038] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0039] See Figures 1-3 The first embodiment of this utility model provides a two-way valve 100. The two-way valve 100 includes a housing 1 and a fixed seat 2 fixedly connected to one end of the housing 1. The inner wall of the housing 1 and the fixed seat 2 together form a ventilation channel 10. The two-way valve 100 includes a first movable member 3 and a second movable member 4 arranged sequentially in the ventilation channel 10. At least a portion of the first movable member 3 passes through the second movable member 4 and extends into the fixed seat 2. The first movable member 3 can move relative to the second movable member 4 and the fixed seat 2 along the axial direction of the first movable member 3. A first gap 11 is provided between the first movable member 3 and the inner wall of the housing 1. When the first movable member 3 moves in a first direction, an air outlet channel 12 is formed between the first movable member 3 and the second movable member 4. The air outlet channel 12 is connected to the first gap 11. When the first movable member 3 moves in a second direction opposite to the first direction, the first movable member 3 pushes the second movable member 4 to move in the second direction. An air inlet channel 13 is formed between the top surface 42 of the second movable member 4 and the inner wall of the housing 1. The air inlet channel 13 is connected to the first gap 11.

[0040] Understandably, when the first movable part 3 moves in the first direction, an air outlet channel 12 is formed between the first movable part 3 and the second movable part 4. When the first movable part 3 pushes the second movable part 4 to move in the second direction, an air inlet channel 13 is formed between the second movable part 4 and the inner wall of the housing 1. The first movable part 3 and the second movable part 4 are arranged in the ventilation channel 10 formed by the connection between the housing 1 and the fixed seat 2, so as to realize the physical separation between the air inlet channel 13 and the air outlet channel 12 of the two-way valve 100, avoid airflow backflow interference, improve ventilation efficiency and sealing performance, and make airflow switching more stable. It will not cause wear or sealing failure due to frequent switching of movable elements in a single channel.

[0041] Specifically, the housing 1 is the basic frame, which is connected and sealed with the fixed base 2 to form an air exchange channel 10. At the same time, the housing 1 and the fixed base 2 seal the first movable member 3 and the second movable member 4 in the air exchange channel 10, restricting the range of movement of the first movable member 3 and the second movable member 4, and providing a flow path for airflow.

[0042] The function of the first movable part 3 is to move and switch the airflow direction. By moving axially, it triggers the formation of the air outlet channel 12 and the air inlet channel 13 respectively: when moving in the first direction, it forms the air outlet channel 12 with the second movable part 4; when moving in the second direction, it pushes the second movable part 4 to form the air inlet channel 13. The first gap 11 between the first movable part 3 and the inner wall of the housing 1 is the common path for airflow.

[0043] The second movable member 4 moves only on the side of the first movable member 3 toward the fixed seat 2. When the airflow is pushed in through the first gap 11, the top surface 42 of the second movable member 4 and the inner wall of the housing 1 help to form an air intake channel 13. At the same time, when the first movable member moves away from the second movable member 4, i.e. when it is venting, it remains stationary to ensure that the air outlet channel 12 is reliably sealed.

[0044] See Figures 4-5 Furthermore, the fixed base 2 is provided with a first through hole 21 corresponding to the first movable member 3, and at least part of the first movable member 3 passes through the second movable member 4 and extends into the first through hole 21; when the first movable member 3 moves along the first direction, the first gap 11, the air outlet channel 12 and the through hole are connected; a second gap 41 is provided between the side wall of the second movable member 4 and the inner wall of the housing 1, and when the first movable member 3 moves along the second direction, the first gap 11, the air inlet channel 13, the second gap 41 and the first through hole 21 are connected in sequence.

[0045] Understandably, the first through hole 21 is the channel for airflow in and out. With the movement of the first movable member 3, it can be connected to the outlet channel 12 and the inlet channel 13 respectively, ensuring the orderly transmission of airflow in different directions. The second gap 41 is the supplementary airflow path from the inlet channel 13 to the first through hole 21 when the first movable member 3 moves in the second direction. The inlet channel 13 is only formed when the first movable member 3 moves in the second direction, which helps the two-way valve 100 to achieve bidirectional airflow control through the simple cooperation of the first movable member 3 and the second movable member 4. The inlet channel 13 and the outlet channel 12 flow through different internal channels, simplifying the structure and improving the flexibility of airflow switching.

[0046] Specifically, the housing 1 is configured in a cylindrical, square, or other shape to adapt to form a hollow ventilation channel 10. A step 14 is provided on the inner wall of the housing 1 on the side close to the second movable member 4 and away from the fixed base 2. The step 14 restricts the movement of the second movable member 4 in the first direction, ensuring that the second movable member 4 can only move axially in the second direction.

[0047] The first movable member 3 is T-shaped piston-like and includes a piston head 31 at the top and a piston rod 32 connected to the top. The second movable member 4 is annular. When the piston head 31 of the first movable member 3 contacts the top surface 42 of the second movable member 4, the ventilation channel 10 is completely sealed. The piston rod 32 passes through the second movable member 4 and extends into the first through hole 21 of the fixed seat 2, ensuring that the first movable member 3 moves stably along the axial direction. The lower surface of the piston head 31 abuts against the top surface 42 of the second movable member 4. When the first movable member 3 moves in the first direction, the piston head 31 separates from the second movable member 4, forming an exhaust channel 12. When it moves in the second direction, the piston head 31 pushes the second movable member 4 to move synchronously, forming an intake channel 13.

[0048] Preferably, the piston head 31 and piston rod 32 of the first movable member 3 can be detachably connected or integrally formed. A sealing gasket can be provided on the sealing top surface or side surface of the piston head 31 to improve the sealing performance when it is in contact with the top surface 42 of the second movable member 4.

[0049] The second movable member 4 is arranged in a ring shape. The top surface 42 of the second movable member 4 fits and abuts against the step 14 on the inner wall of the housing 1. When the first movable member 3 is pushed by force to move the second movable member 4 in the second direction, the second movable member 4 is pushed and the top surface 42 of the second movable member 4 separates from the step 14, forming an air intake channel 13 between it and the inner wall of the housing.

[0050] As a modified implementation, the second movable member 4 can be configured as a stepped annular structure with different outer diameters for different stepped sections. When it mates with the step 14 on the inner wall of the housing 1, it forms a multi-stage air intake channel 13, adjusting the air intake volume according to the pressure received by the first movable member 3 from the direction of the third through hole 15.

[0051] Furthermore, a third through hole 15 is provided on the side of the housing 1 away from the fixed base 2, corresponding to the first through hole 21 and the second through hole 43, and the first movable member 3 and the second movable member 4 cooperate to seal the third through hole 15.

[0052] Understandably, during intake, airflow enters through the third through hole 15, and the first through hole 21 allows the piston rod 32 to extend into, providing guidance for the movement of the first movable member 3. The first movable member 3 pushes the top surface 42 of the second movable member 4 to separate from the step 14 to form the intake channel 13. The second gap 41 between the side wall of the second movable member 4 and the inner wall of the housing 1 allows airflow to pass between the housing 1 and the second movable member 4.

[0053] When the air pressure is balanced, the third through hole 15 is sealed by the second movable member 4 to prevent reverse leakage of airflow. When air is released, if the air pressure in the sealed container is greater than the ambient air pressure, the air pressure enters through the first through hole 21 and exerts a force on the first movable member 3. The third through hole 15 is released from the seal as the first movable member 3 moves in the first direction. The first through hole 21 and the third through hole 15 are connected through the air outlet channel 12 and the first gap 11, becoming the air outlet channel, thus completing the air release. At this time, the second gap 41 does not participate in the airflow transmission. The top surface 42 of the second movable member 4 is tightly fitted to the step 14 to ensure that the air release only proceeds along the path from the first through hole 21 to the air outlet channel 12 to the first gap 11 to the third through hole 15. When the external ambient air pressure is at a certain level, the air pressure enters through the third through hole 15 and applies a force to the first movable member 3. The third through hole 15 is released from the seal as the first movable member 3 and the second movable member 4 move in the second direction. The third through hole 15 and the first through hole 21 are connected through the first gap 11, the air intake channel 13, the second gap 41, and the third gap 22 between the second movable member 4 and the fixed seat 2, becoming the airflow inlet channel, completing the air intake and exhaust. At this time, the bottom surface of the piston is tightly fitted with the top surface 42 of the second movable member 4, and the exhaust channel 12 cannot be formed, ensuring that the exhaust channel 12 and the air intake channel 13 adopt different airflow paths, achieving bidirectional air pressure balance, independent path to prevent crossflow, reliable sealing, and a simple and efficient structure.

[0054] It should be noted that in this application, the first direction is the direction in which the first movable member 3 moves along its own axial direction from the side close to the fixed seat 2 to the side away from the fixed seat 2, that is, the direction in which the piston rod 32 is pushed by the airflow towards the side of the third through hole 15. When the first movable member 3 moves in the first direction, the piston head 31 separates from the top surface 42 of the second movable member 4, forming an air outlet channel 12. At the same time, the piston rod 32 sealing the first through hole 21 disengages from the fixed seat 2, allowing gas to enter from the first through hole 21, corresponding to the air outlet state of the two-way valve 100.

[0055] The second direction is the direction opposite to the first direction along the axial direction of the first movable member 3, that is, the direction in which the piston head 31 is pushed by the airflow to move towards the side closer to the first through hole 21. When the first movable member 3 moves toward the second direction, the piston head 31 pushes the second movable member 4 to move synchronously, forming the air intake channel 13. At the same time, the piston head 31 tightly fits against the top surface 42 of the second movable member 4, sealing the second through hole 43 and the first through hole 21 on the second movable member 4, blocking gas leakage from the first through hole 21, and ensuring that external gas only enters from the air intake channel 13, corresponding to the air intake state of the two-way valve 100.

[0056] It should be noted that in this application, the first through hole 21 can be connected to the interior of the element to be sealed, and the third through hole 15 can be connected to the external environment; alternatively, the third through hole 15 can be connected to the interior of the element to be sealed, and the first through hole 21 can be connected to the external environment. In this application, the specific direction and position of the first through hole 21 and the third through hole 15 are not limited. Therefore, descriptions such as "air inlet" or "air outlet" of the first through hole 21 or the third through hole 15 are for illustrative purposes only and do not represent a specific limitation on the direction of gas entry and exit. Figure 4 and Figure 5 The arrows shown indicate the direction of air flow in ventilation channel 10.

[0057] Furthermore, an inclined contact structure is provided between the piston head 31 of the first movable member 3 and the top surface 42 of the second movable member 4. When the first movable member 3 is pressed and moves, the pressure is accurately guided and transmitted through the inclined contact structure, so that the displacement of the piston head 31 pushing the second movable member 4 has a unique path and posture, ensuring that the formation of the air outlet channel 12 or the air inlet channel 13 is accurate and unique.

[0058] Furthermore, the two-way valve 100 also includes a limiting member 5 disposed in the fixed seat 2, and at least part of the first movable member 3 passes through the second movable member 4 and extends into the through hole to connect with the limiting member 5.

[0059] Understandably, the limiting member 5 restricts the movement range of the first movable member 3 along the first direction and the second direction to ensure stable sealing and conduction functions and avoid displacement exceeding the travel limit, which could lead to disordered airflow path or sealing failure.

[0060] Specifically, the limiting member 5 is set as a ring structure. The inner ring of the limiting member 5 is adapted to the diameter of the piston rod 32 of the first movable member 3. The two are in clearance fit, which neither hinders the movement of the piston rod 32, but also guides it to move in a straight line.

[0061] Furthermore, the second movable member 4 is provided with a second through hole 43 corresponding to the first through hole 21. The second through hole 43 communicates with the first through hole 21. The two-way valve 100 includes a first elastic member 6 disposed in the second through hole 43 and the first through hole 21. The first elastic member 6 is sleeved on the first movable member 3. The two ends of the first elastic member 6 respectively abut against the second movable member 4 and the limiting member 5.

[0062] Understandably, the second through hole 43 is connected to the first through hole 21 to ensure that when the air is discharged, the airflow is smoothly guided from the first through hole 21 to the air outlet channel 12. When the air is inlet, the airflow does not flow through the second through hole 43. The second through hole 43 is sealed by the piston head 31 to block the airflow from flowing through the second through hole 43 and avoid path confusion.

[0063] The first elastic element 6 is sleeved on the piston rod 32, with its two ends abutting against the second movable element 4 and the limiting element 5 respectively. After the intake air pressure or exhaust air pressure disappears, it pushes the first movable element 3 to reset, maintaining the sealing state of the second through hole 43 and the third through hole 15, buffering displacement impact, and protecting the first movable element 3.

[0064] Specifically, when air is released, the air pressure pushes the first movable member 3 to move in the first direction, the first elastic member 6 is compressed, the gap between the rings is reduced, and elastic potential energy is stored. One end of the member abutting the limiting member 5 moves synchronously with the piston rod 32, restricting the unrestricted displacement in the first direction. When air is introduced, the first movable member 3 moves in the opposite direction, and one end of the member abutting the second movable member 4 moves synchronously with the first movable member 3 in the second direction. The first elastic member 6 is compressed, and the piston head 31 is attached to the second movable member 4, blocking the airflow to the second through hole 43 and preventing the airflow from leaking through the second through hole 43.

[0065] Furthermore, the piston rod 32 and the second through hole 43 of the second movable part 4 are fitted with a clearance. The diameter of the piston rod 32 is smaller than the diameter of the second through hole 43, which provides guidance for the axial movement of the piston rod 32 and ensures that the first movable part 3 is accurately displaced along the axis when under force. In the air outlet state, it does not obstruct the smooth discharge of airflow from the first through hole 21 through the second through hole 43 and the air outlet channel 12, so as to realize reliable switching of airflow path under different working conditions.

[0066] Furthermore, the two-way valve 100 includes a second elastic member 7 sleeved on the outside of the second movable member 4, with the two ends of the second elastic member 7 abutting against the second movable member 4 and the fixed seat 2, respectively.

[0067] Understandably, the second elastic member 7 provides a continuous preload force to the second movable member 4 by abutting against the second movable member 4 and the fixed seat 2 at both ends, ensuring that the second movable member 4 fits tightly against the step 14 when there is no airflow or the air pressure is balanced, thereby improving the sealing of the ventilation channel 10. At the same time, it provides a reset force to the second movable member 4 when air is intake, helping the second movable member 4 to quickly switch and reset back to the sealed state after the air intake is completed, thus ensuring the reliability of the airflow path switching.

[0068] Specifically, the first elastic element 6 and the second elastic element 7 can be wave springs. The annular structure of the wave springs is adapted to the outer wall of the piston rod 32 and the outer wall of the second movable element 4 to achieve uniform force distribution in the circumference. Corrosion-resistant spring steel is selected to extend the service life of the fit with the housing 1 and the fixed seat 2. Alternatively, helical springs can be selected. Helical springs with different wire diameters and coil numbers can be selected according to different elastic force requirements. The surfaces of the first elastic element 6 and the second elastic element 7 can be galvanized or chrome-plated to enhance rust resistance and adapt to harsh working environments.

[0069] Furthermore, a third gap 22 is provided between the second movable member 4 and the fixed base 2. When the first movable member 3 pushes the second movable member 4 to move along the second direction, the first gap 11, the air intake channel 13, the second gap 41 and the third gap 22 are connected in sequence.

[0070] Understandably, the third gap 22 is an airflow transfer channel during air intake. When the first movable member 3 pushes the second movable member 4 to move in the second direction, the third gap 22, the second gap 41, the air intake channel 13, and the first gap 11 work together to form a complete air intake path, ensuring that the external airflow can smoothly enter the sealed container. At the same time, during air exhaust, the second movable member 4 and the step 14 are not in contact and cannot form the air intake channel 13. Therefore, the third gap 22 cannot be connected to the air exhaust channel 12. During air exhaust, the airflow cannot flow between the second gap 41 and the third gap 22, which can ensure the independence of the air exhaust path.

[0071] Specifically, the third gap 22 is provided along the mating surface between the fixed seat 2 and the second movable part 4.

[0072] Furthermore, the fixed base 2 and the housing 1 can be fixed by threaded connection or snap fastener, which is convenient for disassembly and assembly. The housing 1 is provided with a limiting hole that is adapted to the first movable part 3 to limit the movement stroke of the first movable part 3.

[0073] Preferably, the material of the housing 1 can be adapted to the usage scenario. For example, stainless steel can be used in humid environments to enhance corrosion resistance; high-temperature resistant engineering plastics can be selected in high-temperature environments to ensure structural stability. No specific limitations are made in this application.

[0074] See Figures 6-7 The second embodiment of this utility model provides an explosion-proof valve 200, including a main body 201 and a two-way valve 100 provided in the first embodiment. The main body 201 includes a cover 8 rotatably connected to the main body 201. The main body 201 is provided with a pressure relief channel 202, and the cover 8 blocks the pressure relief channel 202. The cover 8 is provided with a first ventilation hole 82, and the two-way valve 100 is provided corresponding to the first ventilation hole 82.

[0075] Understandably, the main body 201 is the load-bearing frame of the explosion-proof valve 200, integrates various functional components and provides an installation base. The cover 8 controls the opening and closing of the pressure relief channel 202 by rotation. When there is overpressure, the cover 8 automatically opens to relieve pressure, and after balance, it resets and seals the pressure relief channel 202.

[0076] When a battery cell malfunctions, it will rapidly generate a large amount of harmful gas. If the pressure inside the sealed enclosure exceeds the capacity of the enclosure material, it may cause dangerous events such as explosion and combustion. The pressure relief channel 202 provides a rapid discharge path for the high-pressure harmful gas to prevent the main body 201 from being damaged by overpressure. The first ventilation port 82 connects the two-way valve 100 to the external environment to achieve two-way pressure balance under normal operating conditions and prevent excessive pressure difference between the inside and outside from causing abnormalities.

[0077] Furthermore, the two-way valve 100 is fixedly connected to the first vent 82.

[0078] Specifically, fastening or threaded connection can be used. In this embodiment, the connection method between the two-way valve 100 and the cover 8 is not specifically limited.

[0079] Furthermore, the cover 8 is provided with a ventilation component 81 corresponding to the first ventilation hole 82.

[0080] Understandably, when the cover 8 blocks the pressure relief channel 202, the venting component 81 ensures gas exchange between the first ventilation hole 82 and the external environment, ensuring that the two-way valve 100 can normally achieve air pressure balance through the first ventilation hole 82, preventing external impurities, dust and liquids from entering the explosion-proof valve 200 through the first ventilation hole 82, playing a protective filtering role, and taking into account both ventilation and sealing.

[0081] Specifically, the breathable component 81 can adopt a composite structure of metal mesh and breathable membrane. The metal mesh is set as a ring and adapted to the first ventilation hole 82. The metal mesh is detachably connected to the mounting groove of the cover 8 by buckle, which provides structural support and facilitates later maintenance and replacement. An activated carbon filter layer can also be added to purify the incoming gas while achieving waterproof and breathable properties, which is suitable for scenarios with high air quality requirements.

[0082] The breathable membrane is made of porous waterproof and breathable material, such as e-PTFE membrane, and is attached to the inside of the metal mesh. It allows gas molecules to pass through while blocking liquid water and particles. The cover 8 is provided with an annular protrusion corresponding to the breathable component 81, which cooperates with the groove on the edge of the breathable component 81 to form a seal and prevent unfiltered gas from seeping in through the gap.

[0083] Furthermore, the main body 201 includes a valve body 9 rotatably connected to the cover 8, a pressure relief channel 202 is provided on the valve body 9, a first vent 82 is provided on the cover 8, and a second vent 83 is provided on the cover 8. The first vent 82 and the second vent 83 are spaced apart on the cover 8.

[0084] Understandably, the valve body 9 supports the cover body 8 and provides a pressure relief reference. The cover body 8 provides an installation reference for the two-way valve 100. The pressure relief channel 202 is separated from the pressure-balanced airflow path by the first vent 82 and the second vent 83 spaced apart on the cover body 8, ensuring that the pressure relief and ventilation functions operate independently.

[0085] Specifically, the valve body 9 is disc-shaped, and a rotating shaft 84 is provided on the top of the valve body 9. The shaft is rotatably connected to the cover 8 via a torsion spring 85. The cover 8 is fan-shaped, and the edge of the cover 8 facing the valve body 9 is fitted and sealed to the valve body 9. The second vent 83 is provided at the end of the cover 8 away from the rotating shaft 84, and is radially offset from the first vent 82 along the cover 8 to improve the air pressure balance efficiency. The cover 8 switches states by rotation. Normally, it seals the pressure relief channel 202, and opens to relieve pressure when there is overpressure.

[0086] The valve body 9 adopts a cylindrical hollow structure. The inner wall of the valve body 9 is provided with an annular step 14 for the cover 8 to be limited. The outer side of the valve body 9 is provided with a flange for easy connection with the equipment. The edge of the cover 8 is embedded with a high-temperature resistant sealing gasket, which forms a line seal with the port of the pressure relief channel 202.

[0087] When the pressure relief channel 202 is opened, the cover 8 rotates outward around the valve body 9, forming an angle of 30°-45° with the valve body 9, and the pressure relief channel 202 is fully exposed; at this time, the two-way valve 100 and the venting component 81 rotate synchronously with the cover 8, without affecting the gas discharge of the pressure relief channel 202, ensuring the rapid release of high-pressure airflow.

[0088] Compared with the prior art, the bidirectional valve and explosion-proof valve provided by this utility model have the following advantages: 1. The bidirectional valve provided in this embodiment of the utility model has a housing and a fixed base forming an air exchange channel. A first movable member and a second movable member are sequentially arranged in the air exchange channel. The first movable member can move along its own axial direction and forms a first gap with the inner wall of the housing. When air is discharged, the first movable member moves along a first direction, forming an air discharge channel with the second movable member and connecting with the first gap, providing a flow path for airflow and realizing directional air discharge. When air is inlet, the first movable member moves along a second direction and pushes the second movable member, so that the second movable member forms an air inlet channel with the inner wall of the housing and connects with the first gap, realizing directional air inlet. The second movable member and the first movable member move in coordination to form separate air discharge channels and air inlet channels. The directional separation of air discharge and air inlet precisely controls the airflow direction, avoids turbulence and backflow, effectively reduces the amount of water vapor carried in during air inlet, and ensures smooth airflow during air discharge, improving exhaust efficiency, adapting to the airflow pressure requirements of different directions, and improving the accuracy and stability of pressure difference balance.

[0089] 2. In the bidirectional valve provided in this embodiment, the first through hole of the fixed seat provides a moving guide for the first movable member and forms an airflow path; the first movable member passes through the first through hole and moves within the first through hole. By cooperating with the second movable member, when moving in the first direction, the first gap, the air outlet channel and the first through hole are connected. The first through hole is connected to the interior of the bidirectional valve sealing body, thereby realizing air outlet; the second gap between the second movable member and the inner wall of the housing, when the first movable member moves in the second direction, makes the first gap, the air inlet channel, the second gap and the first through hole connected in sequence to form an independent air inlet path. The airflow direction during air inlet is clearly defined in the second gap, forming a positional distinction with the air outlet channel, strengthening the separation of the air inlet channel and the air outlet channel, improving the airflow direction control accuracy, reducing water vapor carry-in, and enhancing working stability.

[0090] 3. In the embodiment of this utility model, the third through hole of the two-way valve is located on the side of the housing away from the fixed seat, corresponding to the first through hole and the second through hole. When the first movable part moves to the unsealed state, the third through hole can be used as an airflow inlet and outlet to cooperate with other channels to expand the airflow path. When the first movable part is reset to the sealed state, the first movable part blocks the airflow entering from the direction of the third through hole, ensuring that the air inlet channel and the air outlet channel are accurately closed.

[0091] 4. In the embodiment of this utility model, the two-way valve has a limiting member disposed in the fixed seat and connected to the first movable member extending to the first through hole. This limits the axial movement range of the first movable member, preventing it from displacing excessively and leaving the preset working position when moving along the first or second direction. The limiting member constrains the movement stroke of the first movable member, which can stabilize the formation state of the air outlet channel and the air inlet channel and ensure the reliability of the airflow path.

[0092] 5. In the bidirectional valve provided in this embodiment of the present invention, a first elastic element is sleeved on a first movable element, with its two ends respectively abutting against a second movable element and a limiting element, providing an elastic restoring force. When the first movable element moves along a first direction, the first elastic element is compressed and accumulates elastic potential energy. After the driving force disappears, it can pull the first movable element back to its original position, ensuring that the air outlet channel is closed in a timely manner. At the same time, by continuously abutting, the elastic element can maintain the stability of the fit between the first and second movable elements, reducing component loosening caused by vibration, etc., and ensuring the reliability of the formation and closure of the airflow channel.

[0093] 6. In the bidirectional valve provided in this embodiment of the utility model, the second elastic element is sleeved on the outside of the second movable element, with its two ends respectively abutting against the second movable element and the fixed seat, providing an independent elastic restoring force for the second movable element. When the first movable element pushes the second movable element to move along the second direction, the second elastic element is compressed and stores potential energy. After the driving force is released, it can independently drive the second movable element and the first movable element to reset, ensuring precise closure of the air intake channel.

[0094] 7. In the embodiment of this utility model, the third gap of the two-way valve is set between the second movable member and the fixed seat. The third gap is formed when the first movable member pushes the second movable member to move in the second direction. It is a transition channel for the intake airflow to the first through hole, ensuring that the intake process is unobstructed. At the same time, the third gap avoids direct rigid contact between the second movable member and the inner wall of the fixed seat when the second movable member moves, reducing component wear. It can also assist in controlling the intake flow rate by preset the size of the third gap.

[0095] 8. The second embodiment of this utility model provides an explosion-proof valve. The main body is the basic structure of the explosion-proof valve, providing installation support for the cover and the two-way valve. The rotatable cover normally blocks the pressure relief channel, forming a seal. When one side is overpressurized, the cover rotates to open the pressure relief channel, providing a path for the overpressurized gas to escape, preventing excessive pressure from causing danger, and achieving a safe pressure relief function. The first vent is correspondingly set with the two-way valve, allowing the two-way valve to exchange airflow with the external environment through the first vent. This maintains normal air pressure balance and prevents excessive moisture from being introduced during air intake. The cover and the two-way valve work together to take into account both explosion-proof pressure relief and ventilation functions, improving the safety and reliability of the explosion-proof valve.

[0096] 8. The two-way valve provided in this embodiment of the utility model has a ventilated component on the cover that works in conjunction with the first vent of the valve body to enhance gas exchange efficiency. The ventilated component adopts a porous structure to allow air to pass through, and works in conjunction with the first vent to ensure normal ventilation and maintain air pressure balance. At the same time, the ventilated component has waterproof properties to block water vapor and liquid intrusion, and avoid condensation inside the box or damage to components due to moisture.

[0097] 10. In the embodiment of this utility model, the explosion-proof valve has a rotating connection between the valve body and the cover to ensure that the pressure relief channel can be opened and closed flexibly. The first vent and the second vent are spaced apart on the cover to separate the air exchange and pressure relief airflow paths of the bidirectional valve and avoid mutual interference.

[0098] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bidirectional valve characterized by: The two-way valve includes a housing and a fixed seat fixedly connected to one end of the housing. The inner wall of the housing and the fixed seat together form an air exchange channel. The two-way valve includes a first movable member and a second movable member sequentially disposed in the ventilation channel. At least a portion of the first movable member passes through the second movable member and extends into the fixed seat. The first movable member is movable relative to the second movable member and the fixed seat along the axial direction of the first movable member. A first gap is provided between the first movable component and the inner wall of the housing. When the first movable component moves in the first direction, an air outlet channel is formed between the first movable component and the second movable component. The air outlet channel is connected to the first gap. When the first movable member moves in a second direction opposite to the first direction, the first movable member pushes the second movable member to move in the second direction. An air intake channel is formed between the top surface of the second movable member and the inner wall of the housing, and the air intake channel is connected to the first gap.

2. The bidirectional valve as described in claim 1, characterized in that: The fixed base is provided with a first through hole corresponding to the first movable member, and at least part of the first movable member passes through the second movable member and extends into the first through hole; when the first movable member moves along the first direction, the first gap, the air outlet channel and the through hole are connected. A second gap is provided between the side wall of the second movable component and the inner wall of the housing. When the first movable component moves along the second direction, the first gap, the air intake channel, the second gap, and the first through hole are connected in sequence.

3. The bidirectional valve as described in claim 2, characterized in that: The housing has a third through hole on the side opposite to the fixed base, corresponding to the first through hole, and the first movable member and the second movable member cooperate to seal the third through hole.

4. The bidirectional valve as described in claim 3, characterized in that: The bidirectional valve further includes a limiting member disposed within the fixed base, wherein at least a portion of the first movable member passes through the second movable member and extends into the through hole to connect with the limiting member.

5. The bidirectional valve of claim 4, wherein: The second movable member is provided with a second through hole corresponding to the first through hole. The second through hole communicates with the first through hole. The two-way valve includes a first elastic member disposed in the second through hole and the first through hole. The first elastic member is sleeved on the first movable member. The two ends of the first elastic member respectively abut against the second movable member and the limiting member.

6. The bidirectional valve as described in claim 4, characterized in that: The bidirectional valve includes a second elastic member sleeved on the outside of the second movable member, with the two ends of the second elastic member respectively abutting against the second movable member and the fixed seat.

7. The bidirectional valve as described in claim 5, characterized in that: A third gap is provided between the second movable component and the fixed base. When the first movable component pushes the second movable component to move along the second direction, the first gap, the air intake channel, the second gap and the third gap are connected in sequence.

8. An explosion-proof valve, characterized in that: The device includes a main body and a two-way valve as described in any one of claims 1-7. The main body includes a cover rotatably connected to the main body, and the main body is provided with a pressure relief channel. The cover covers the pressure relief channel. The cover is provided with a first vent hole, and the two-way valve is provided corresponding to the first vent hole.

9. The explosion-proof valve as described in claim 8, characterized in that: The cover is provided with a breathable component corresponding to the first ventilation hole.

10. The explosion-proof valve as described in claim 8, characterized in that: The main body includes a valve body rotatably connected to the cover, a pressure relief channel is provided on the valve body, a first vent is provided on the cover, and a second vent is provided on the cover, with the first vent and the second vent spaced apart on the cover.

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