A two-way pressure relief device and method

Abstract

The application provides a bidirectional pressure relief device and method, relates to the field of inflatable film pressure relief, and comprises an outer cylinder, a transmission rod, a piston cylinder and a gas chamber. The outer cylinder is slidably connected with the transmission rod. The two end portions of the side wall of the piston cylinder are provided with limiting rings. The outer wall of the piston cylinder is connected with the inner wall of the outer cylinder, and the gas chamber is connected between the outer wall of the piston cylinder and the inner wall of the outer cylinder. The gas chamber is annular in structure and is arranged around the outer periphery of the piston cylinder. The side wall of the piston cylinder is provided with a first through hole. The inner annular wall of the gas chamber is provided with a gas chamber through hole. A first gas groove is formed in one end surface of the piston cylinder and arranged around the transmission rod. A second gas groove is formed in one end surface of the gas chamber and arranged around the piston cylinder. Third and fourth gas grooves are respectively formed in the two end surfaces of the outer cylinder and arranged around the transmission rod. The application is convenient to operate, avoids frequent damage caused by the forcible opening of the door under the action of pressure, and is simple in structure and convenient to quantitatively produce.

Description

Technical Field

[0001] This invention relates to the field of inflatable membrane depressurization, and more particularly to a bidirectional depressurization device and method. Background Technology

[0002] The development of inflatable membrane structures in China is accelerating. Due to their advantages such as ease of construction, low overall cost, ability to achieve internal beam-free and column-free structures, and the capacity for large spans and spacious environments, more and more civil and industrial enterprises are adopting inflatable membrane buildings. Most inflatable membrane structures use a single-layer PVDF membrane with steel cables, relying on internal air pressure to support the membrane and cables. The internal air pressure is generally maintained between 200Pa and 600Pa. Since inflatable membrane structures rely on internal air pressure for support, maintaining the airtightness of the entire membrane is extremely important. To ensure necessary airtightness, the entrances and exits of inflatable membrane buildings should prevent air leakage when the doors are opened. The current common practice is to use double doors with a transition zone between them. The two doors also have an interlocking function; when one door is opened, the other door must be closed and cannot be opened. This ensures that the internal air pressure of the membrane does not depressurize rapidly, affecting the operation and safety of the membrane. Due to the pressure difference between the inside and outside, some projects using swing doors, especially when the air film pressure is high, have problems with opening the swing doors. Furthermore, because they must be opened with great force, some swing door handles, connectors, etc. are easily damaged.

[0003] Most existing airtight passages in air-supported membrane structures lack relevant pressure relief devices, making it difficult to open the inner and outer doors. Furthermore, the door handles and connectors are easily damaged, causing inconvenience for personnel entering and exiting, as well as high maintenance costs. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a bidirectional pressure relief device and method, specifically comprising:

[0005] A bidirectional pressure relief device includes an outer cylinder, a transmission rod, a piston cylinder, and an air chamber;

[0006] The outer cylinder has a built-in cavity structure; a third air groove and a fourth air groove are respectively opened on the two end faces of the outer cylinder; the third air groove and the fourth air groove are arranged around the transmission rod;

[0007] The piston cylinder is disposed within the cavity structure of the outer cylinder. The piston cylinder has an internal cavity structure. Limiting rings are provided around the circumference of the piston cylinder at both end faces. A first through hole is provided on the side wall of the piston cylinder. A first air groove is provided on one end face of the piston cylinder, and the first air groove is arranged around the transmission rod.

[0008] The air chamber is connected between the outer wall of the piston cylinder and the inner wall of the outer cylinder. The air chamber has an annular structure and is arranged around the outer periphery of the piston cylinder. The air chamber has an internal cavity structure. The outer annular wall of the air chamber is fixedly connected to the inner wall of the outer cylinder, and the inner annular wall of the air chamber is slidably connected to the outer wall of the piston cylinder. The air chamber and the piston cylinder divide the cavity of the outer cylinder into two non-communicating spaces. An air chamber through hole is opened on the inner annular side wall of the air chamber. A second air groove is opened on one end face of the air chamber, and the second air groove is arranged around the piston cylinder.

[0009] The side wall of the piston cylinder is longer than the length of the air chamber. When the piston cylinder moves along the axis, the limiting ring abuts against the end face of the air chamber, so that the first through hole communicates with the through hole of the air chamber; the end face of the piston cylinder where the first air groove is located is opposite in direction to the end face of the air chamber where the second air groove is located.

[0010] The transmission rod passes through the cavity structure of the outer cylinder and the cavity structure of the piston cylinder. The axis of the transmission rod coincides with the axis of the outer cylinder, the axis of the piston cylinder, and the axis of the air chamber. The transmission rod is fixedly connected to the piston cylinder and slidably connected to the outer cylinder. The transmission rod supports and drives the piston cylinder to slide within the cavity of the outer cylinder.

[0011] When the gas passes through the third gas groove, it pushes the transmission rod to connect the first through hole with the gas chamber through hole.

[0012] Optionally, there are two air chamber through holes, namely a first air chamber through hole and a second air chamber through hole; when the piston cylinder is in the initial position, the first air chamber through hole and the second air chamber through hole are located on both sides of the first through hole.

[0013] Optionally, handles are provided at both ends of the transmission rod.

[0014] Optionally, an inner ring plate is connected between the two end faces of the outer cylinder and the side wall of the outer cylinder. The inner ring plate is located inside the cavity of the outer cylinder and is used to reinforce the two end faces of the outer cylinder.

[0015] Optionally, a return spring is provided on the transmission rod between the inner walls of the two end faces of the outer cylinder and the outer walls of the two end faces of the piston cylinder; when one end of the transmission rod is pushed, the transmission rod slides with the piston cylinder in the cavity of the outer cylinder; when the transmission rod is released, the return spring drives the transmission rod and the piston cylinder to return to their original positions.

[0016] Optionally, the handle is hemispherical in shape.

[0017] Optionally, the outer cylinder is made of metal.

[0018] Optionally, the outer cylinder is embedded horizontally or inclined in the wall, and the handles at both ends of the transmission rod are located on the outside of the two sides of the wall.

[0019] A bidirectional pressure relief method, applied to the aforementioned bidirectional pressure relief device, the method comprising:

[0020] Pushing the handle causes the transmission rod to slide the piston cylinder, connecting the first through hole with the air chamber through hole.

[0021] Optionally,

[0022] When operating the handle at the gas inlet of the bidirectional pressure relief device:

[0023] Push the handle at the gas input end to connect the first through hole with the second gas chamber through hole;

[0024] When operating the handle at the gas output end of the bidirectional pressure relief device:

[0025] Push the handle at the gas output end to connect the first through hole with the third gas chamber through hole.

[0026] The above technical solution has at least the following advantages compared with the existing technology:

[0027] This solution, by setting up a two-way pressure relief device, enables the airtight passage swing door to open smoothly, facilitating operation and avoiding frequent damage and maintenance caused by the door being opened forcefully under pressure.

[0028] This solution achieves bidirectional pressure relief, meaning that pressure balance can be achieved by simply pressing the button regardless of whether the person is on the high-pressure side or the low-pressure side. Furthermore, by installing return springs on both sides of the piston cylinder, it achieves the effect of sealing when the hand is released and releasing pressure when the button is pressed.

[0029] This solution is simple and easy to implement, uses conventional materials for design and manufacturing, and is easy to mass-produce and install. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A plan view illustrating the application scenario of a bidirectional pressure relief device provided by this invention;

[0032] Figure 2 A cross-sectional view of an application scenario for a bidirectional pressure relief device provided by the present invention;

[0033] Figure 3 A structural diagram of a bidirectional pressure relief device provided by the present invention;

[0034] Figure 4 The airflow path of a bidirectional pressure relief device provided by the present invention during low-pressure side operation;

[0035] Figure 5 The airflow path of a bidirectional pressure relief device provided by the present invention during operation on the high-pressure side.

[0036] Figure label:

[0037] 1. Wall; 2. Outer cylinder; 21. Inner ring plate; 22. Third air groove; 23. Fourth air groove; 31. Handle; 32. Transmission rod; 33. Return spring; 4. Air chamber; 41. Second air chamber through hole; 42. First air chamber through hole; 43. Second air groove; 5. Piston cylinder; 51. Limiting ring; 52. First through hole; 53. First air groove. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or “connected,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0040] It should be noted that the terms "up", "down", "left", "right", "front", and "back" used in this invention are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] Given that most airtight passages in existing air-supported membrane structures lack relevant pressure relief devices, making it difficult to open inner and outer doors, and causing door handles and connectors to be easily damaged, resulting in inconvenience for personnel entry and exit and high maintenance costs, this embodiment provides a bidirectional pressure relief device and method, specifically including the following:

[0042] like Figures 1-5 As shown, a bidirectional pressure relief device is installed on wall 1 between two spaces with different air pressures. The two sides of the device represent the low-pressure space and the high-pressure space, respectively. The device connects the interior and exterior spaces, achieving pressure balance between them.

[0043] like Figure 1 As shown, the fundamental difference between swing doors in air-supported membrane structures and swing doors in ordinary buildings lies in the large pressure difference between the inside and outside of the door in an air-supported membrane structure. In this embodiment, the internal pressure P2 of the air-supported membrane is the pressure source, the airtight channel is the buffer space, the internal pressure is P1, the external pressure is P0, and under normal conditions, P2>P1>P0.

[0044] like Figure 3 The bidirectional pressure relief device includes an outer cylinder 2, which is preferably a cylindrical structure made of metal. The outer cylinder 2 has a hollow interior. Through holes of equal size and corresponding positions are provided on both end faces of the outer cylinder 2. A transmission rod 32 is slidably connected between the two through holes, meaning the transmission rod 32 passes through the two through holes and can slide between them. Handles 31 are provided at both ends of the transmission rod 32, preferably in a hemispherical shape, to facilitate pressing operation.

[0045] Inside the outer cylinder 2, an inner ring plate 21 is connected between the two end faces of the outer cylinder 2 and the side wall of the outer cylinder 2. The inner ring plate 21 is used to reinforce the two end faces of the outer cylinder 2.

[0046] Inside the cavity of the outer cylinder 2, a piston cylinder 5 is welded to the middle of the transmission rod 32. The piston cylinder 5 is arranged around the transmission rod 32, that is, the transmission rod 32 passes through the piston cylinder 5. When the transmission rod 32 slides, the piston cylinder 5 moves with the transmission rod 32. In this embodiment, the piston cylinder 5 is preferably a cylindrical structure with a hollow interior. Limiting rings 51 are provided around the circumference of the piston cylinder 5 at both end faces. The limiting rings 51 have an annular protrusion structure.

[0047] An air chamber 4 is connected between the outer wall of the piston cylinder 5 and the inner wall of the outer cylinder 2. The air chamber 4 has an annular structure, meaning that the outer wall of the outer ring of the air chamber 4 is either the inner wall of the outer cylinder 2 or fixedly connected to it. The outer wall of the inner ring of the air chamber 4 is connected to the outer wall of the piston cylinder 5. The air chamber 4 is arranged around the outer periphery of the piston cylinder 5, and the air chamber 4 has a cavity structure; the air chamber 4 and the piston cylinder 5 divide the cavity of the outer cylinder 2 into two unconnected spaces.

[0048] The transmission rod 32 penetrates the cavity structure of the outer cylinder 2 and the cavity structure of the piston cylinder 5. The axis of the transmission rod 32 coincides with the axis of the outer cylinder 2, the axis of the piston cylinder 5, and the axis of the air chamber 4. The transmission rod 32 is fixedly connected to the piston cylinder 5 and slidably connected to the outer cylinder 2, enabling the piston cylinder 5 to slide within the cavity of the outer cylinder 2. Return springs 33 are respectively installed on the transmission rod 32 between the inner walls of the two end faces of the outer cylinder 2 and the outer walls of the two end faces of the piston cylinder 5. Specifically, return springs 33 are installed between the inner walls of the end faces of the outer cylinder 2 and the outer walls of the end faces of the piston cylinder 5, and return springs 33 are also installed on the outer sides of both ends of the piston cylinder 5. When the handle 31 at one end of the transmission rod 32 is pushed, the transmission rod 32 slides with the piston cylinder 5 within the cavity of the outer cylinder 2. When the handle 31 at the end of the transmission rod 32 is released, the return springs 33 reset the transmission rod 32 and the piston cylinder 5, ensuring a sealing effect even without pressure operation.

[0049] The side wall of piston cylinder 5 is longer than the length of air chamber 4. When the transmission rod 32 slides piston cylinder 5 along the axis, it slides to a certain position, and the limiting ring 51 abuts against the outer wall of the end face of air chamber 4. Since air chamber 4 is fixedly connected to the inner wall of outer cylinder 2, that is, the position of air chamber 4 is fixed, the limiting ring 51 and the outer wall of the end face of air chamber 4 cooperate to limit piston cylinder 5, so that piston cylinder 5 moves to a fixed position. Since both ends of the side wall of piston cylinder 5 are provided with limiting rings 51, the position of piston cylinder 5 in both directions is limited.

[0050] A first through hole 52 is provided on the side wall of the piston cylinder 5. The first through hole 52 is a through hole that penetrates the side wall of the piston cylinder 5 at the same position. A gas chamber through hole is provided on the side wall of the gas chamber 4 closest to the piston cylinder 5, i.e., on the inner ring side wall of the gas chamber 4. Preferably, there are two gas chamber through holes: a first gas chamber through hole 42 and a second gas chamber through hole 41. Both the first gas chamber through hole 42 and the second gas chamber through hole 41 are through holes, respectively penetrating the corresponding side wall at the same position on the inner ring side wall of the gas chamber 4. When the piston cylinder 5 is in the initial position, the first gas chamber through hole 42 and the second gas chamber through hole 41 are located on both sides of the first through hole 52.

[0051] A first air groove 53 is formed on one end face of the piston cylinder 5, and the first air groove 53 is arranged around the drive rod. A second air groove 43 is formed on one end face of the air chamber 4, and the second air groove 43 is arranged around the piston cylinder 5. The end face of the piston cylinder 5 where the first air groove 53 is located is opposite in direction to the end face of the air chamber 4 where the second air groove 43 is located. A third air groove 22 and a fourth air groove 23 are formed on the two end faces of the outer cylinder 2, respectively, and the third air groove 22 and the fourth air groove 23 are arranged around the drive rod 32. The third air groove 22 is in the same direction as the first air groove 53, and the fourth air groove 23 is in the same direction as the second air groove 43.

[0052] When the piston cylinder 5 slides to the limit position, the first through hole 52 is connected to the first air chamber through hole 42 or the second air chamber through hole 41. That is, when the piston cylinder 5 slides to the limit position in the direction of the second air groove 43, the limit ring 51 limits the piston cylinder 5. At this time, the first through hole 52 is connected to the first air chamber through hole 42. When the piston cylinder 5 slides to the limit position in the direction of the first air groove 53, the limit ring 51 limits the piston cylinder 5. At this time, the first through hole 52 is connected to the second air chamber through hole 41.

[0053] The air chamber 4 divides the cavity inside the outer cylinder 2 into two spaces, which are connected only by the second air groove 43.

[0054] In this embodiment, the direction of the first gas groove 53 is the direction of the high-pressure space, and the direction of the second gas groove 43 is the direction of the low-pressure space. The positions of the low-pressure space and the high-pressure space can be interchanged. In this embodiment, the gas in the high-pressure space enters the space of the outer cylinder 2 through the third gas groove 22, and the gas enters the cavity of the piston cylinder 5 through the first gas groove 53. When the handles 31 at both ends of the transmission rod 32 are pushed, the first through hole 52 communicates with the first gas chamber through hole 42 or the second gas chamber through hole 41, respectively. The gas enters the cavity of the gas chamber 4 through the connected first through hole 52 and the first gas chamber through hole 42 or the connected first through hole 52 and the second gas chamber through hole 41. The gas enters the cavity of the outer cylinder 2 through the second gas groove 43, and the gas enters the low-pressure space through the fourth gas groove 23.

[0055] The outer cylinder 2 is embedded horizontally or inclined in the wall 1, and the handles 31 at both ends of the transmission rod 32 are located on the outside of the two sides of the wall 1 respectively.

[0056] This solution, by setting up a two-way pressure relief device, enables the airtight passage swing door to open smoothly, facilitating operation and avoiding frequent damage and maintenance caused by the door being opened forcefully under pressure.

[0057] This solution achieves bidirectional pressure relief, meaning that pressure balance can be achieved by simply pressing the button regardless of whether the person is on the high-pressure side or the low-pressure side. Furthermore, by installing return springs on both sides of the piston cylinder, it achieves the effect of sealing when the hand is released and releasing pressure when the button is pressed.

[0058] This solution is simple and easy to implement, uses conventional materials for design and manufacturing, and is easy to mass-produce and install.

[0059] like Figure 5 As shown, this embodiment provides a bidirectional pressure relief method. When operating the bidirectional pressure relief device on the high-pressure side, that is, when operating the handle 31 at the gas input end of the bidirectional pressure relief device:

[0060] S101, push the handle 31 of the transmission rod 32 on the high-pressure side, the transmission rod 32 drives the piston cylinder 5 to slide towards the low-pressure side, the limiting ring 51 limits the piston cylinder 5 to slide to the limiting position, so that the first through hole 52 is connected to the first air chamber through hole 42.

[0061] S102. Gas from the high-pressure side enters the cavity on one side of the outer cylinder 2 through the third gas groove 22. After entering the cavity on one side of the outer cylinder 2, the gas enters the cavity of the piston cylinder 5 through the first gas groove 53. The gas entering the cavity of the piston cylinder 5 enters the cavity of the gas chamber 4 through the first through hole 52 and the first gas chamber through hole 42. The gas entering the cavity of the gas chamber 4 enters the cavity on the other side of the outer cylinder 2 through the second gas groove 43. The gas entering the cavity on the other side of the outer cylinder 2 enters the space on the low-pressure side through the fourth gas groove 23.

[0062] like Figure 4 As shown, this embodiment provides a bidirectional pressure relief method. When the bidirectional pressure relief device is operated on the low-pressure side, that is, when the handle 31 of the gas output terminal of the bidirectional pressure relief device is operated:

[0063] S201, push the handle 31 of the transmission rod 32 on the low pressure side, the transmission rod 32 drives the piston cylinder 5 to slide towards the high pressure side, the limiting ring 51 limits the piston cylinder 5 to slide to the limiting position, so that the first through hole 52 is connected to the second air chamber through hole 41.

[0064] S202. Gas from the high-pressure side enters the cavity on one side of the outer cylinder 2 through the third gas groove 22. After entering the cavity on one side of the outer cylinder 2, the gas enters the cavity of the piston cylinder 5 through the first gas groove 53. The gas entering the cavity of the piston cylinder 5 enters the cavity of the gas chamber 4 through the connecting first through hole 52 and second gas chamber through hole 41. The gas entering the cavity of the gas chamber 4 enters the cavity on the other side of the outer cylinder 2 through the second gas groove 43. The gas entering the cavity on the other side of the outer cylinder 2 enters the space on the low-pressure side through the fourth gas groove 23.

[0065] In this embodiment, each time a door is entered or exited, the pressure relief handle 31 on that side is pressed. The handle 31 operates the piston cylinder 5 to move through the transmission rod 32. The piston cylinder 5 is misaligned with the sealing air chamber 4, and air flows under pressure to achieve pressure balance. After the door is opened, the pressure relief handle 31 is released, and the sealing effect is restored under the action of the return spring 33.

[0066] This solution, by setting up a two-way pressure relief device, enables the airtight passage swing door to open smoothly, facilitating operation and avoiding frequent damage and maintenance caused by the door being opened forcefully under pressure.

[0067] This solution achieves bidirectional pressure relief, meaning that pressure balance can be achieved by simply pressing the button regardless of whether the person is on the high-pressure side or the low-pressure side. Furthermore, by installing return springs on both sides of the piston cylinder, it achieves the effect of sealing when the hand is released and releasing pressure when the button is pressed.

[0068] This solution is simple and easy to implement, uses conventional materials for design and manufacturing, and is easy to mass-produce and install.

[0069] The following points need to be explained:

[0070] (1) The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention. Other structures can refer to the general design.

[0071] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the invention, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0072] (3) Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0073] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A bidirectional pressure relief device, characterized in that, Includes outer cylinder, drive rod, piston cylinder and air chamber; The outer cylinder has a built-in cavity structure; a third air groove and a fourth air groove are respectively opened on the two end faces of the outer cylinder; the third air groove and the fourth air groove are arranged around the transmission rod; The piston cylinder is disposed within the cavity structure of the outer cylinder. The piston cylinder has an internal cavity structure. Limiting rings are provided around the circumference of the piston cylinder at both end faces. A first through hole is provided on the side wall of the piston cylinder. A first air groove is provided on one end face of the piston cylinder, and the first air groove is arranged around the transmission rod. The air chamber is connected between the outer wall of the piston cylinder and the inner wall of the outer cylinder. The air chamber has an annular structure and is arranged around the outer periphery of the piston cylinder. The air chamber has an internal cavity structure. The outer annular wall of the air chamber is fixedly connected to the inner wall of the outer cylinder, and the inner annular wall of the air chamber is slidably connected to the outer wall of the piston cylinder. The air chamber and the piston cylinder divide the cavity of the outer cylinder into two non-communicating spaces. An air chamber through hole is opened on the inner annular side wall of the air chamber. A second air groove is opened on one end face of the air chamber, and the second air groove is arranged around the piston cylinder. The side wall of the piston cylinder is longer than the length of the air chamber. When the piston cylinder moves along the axis, the limiting ring abuts against the end face of the air chamber, so that the first through hole communicates with the through hole of the air chamber; the end face of the piston cylinder where the first air groove is located is opposite in direction to the end face of the air chamber where the second air groove is located. The transmission rod passes through the cavity structure of the outer cylinder and the cavity structure of the piston cylinder, and the axis of the transmission rod coincides with the axis of the outer cylinder, the axis of the piston cylinder and the axis of the air chamber; The transmission rod is fixedly connected to the piston cylinder and slidably connected to the outer cylinder. The transmission rod supports and drives the piston cylinder to slide within the cavity of the outer cylinder. When the gas passes through the third gas groove, it pushes the transmission rod to connect the first through hole with the gas chamber through hole; The transmission rod is provided with handles at both ends; There are two air chamber through holes, namely the first air chamber through hole and the second air chamber through hole; when the piston cylinder is in the initial position, the first air chamber through hole and the second air chamber through hole are located on both sides of the first through hole.

2. The bidirectional pressure relief device of claim 1, wherein, An inner ring plate is connected between the two end faces of the outer cylinder and the side wall of the outer cylinder. The inner ring plate is located inside the cavity of the outer cylinder and is used to reinforce the two end faces of the outer cylinder.

3. The bidirectional pressure relief device according to claim 1, characterized in that, On the transmission rod, a return spring is respectively provided between the inner wall of the two end faces of the outer cylinder and the outer wall of the two end faces of the piston cylinder; when one end of the transmission rod is pushed, the transmission rod slides with the piston cylinder in the cavity of the outer cylinder; when the transmission rod is released, the return spring drives the transmission rod and the piston cylinder to return to their original positions.

4. The bidirectional pressure relief device of claim 1, wherein, The handle is hemispherical in shape.

5. The bidirectional pressure relief device of claim 1, wherein, The outer cylinder is made of metal.

6. The bidirectional pressure relief device of claim 1, wherein, The outer cylinder is embedded in the wall horizontally or at an angle, and the handles at both ends of the transmission rod are located on the outside of the wall on both sides.

7. A method of bidirectional pressure relief, characterized in that, The method, applied to the bidirectional pressure relief device according to any one of claims 1 to 6, comprises: Pushing the handle causes the transmission rod to slide the piston cylinder, connecting the first through hole with the air chamber through hole.

8. The bidirectional pressure relief method according to claim 7, characterized in that, When operating the handle at the gas inlet of the bidirectional pressure relief device: Push the handle at the gas input end to connect the first through hole with the first gas chamber through hole; When operating the handle at the gas output end of the bidirectional pressure relief device: Push the handle at the gas output end to connect the first through hole with the second gas chamber through hole.

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