A multifunctional valve

Abstract

The present application belongs to the technical field of valve, and particularly relates to a multifunctional valve, wherein a main valve body is provided with an interface I and an interface II, and is internally provided with a main flow channel, a limiting seat and a positioning sleeve, which are connected with the interface I and the interface II; a main valve core is arranged in the main flow channel, one end of the main valve core is arranged towards the limiting seat, the other end of the main valve core passes through the positioning sleeve, and an exhaust gap is arranged between the main valve core and the inner side of the positioning sleeve; a spring sleeve is arranged outside the main valve core; an auxiliary valve body is provided with an interface IV and an interface III, and is internally provided with an auxiliary flow channel; an auxiliary piston is arranged in the auxiliary flow channel, one end of the auxiliary piston is detachably connected with the main valve core, and the auxiliary piston can move in the auxiliary flow channel under external force to drive the main valve core to move axially in the main flow channel. The present application can satisfy the functions of inflation, exhaust and safety pressure relief, reduce the number of valve interfaces, reduce the risk of leakage in the operation of target equipment, and improve the safety and reliability of the operation of target equipment.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, and specifically relates to a multifunctional valve. Background Technology

[0002] Valves are control components in fluid transport systems. Depending on the function to be performed, the specific type of valve will also be different. Depending on the application scenario, sometimes it is necessary to install multiple different types of valves according to the corresponding requirements. In particular, some valves are only used for testing before the equipment is put into operation and are not used during the operation of the equipment. This will result in a large number of valve interfaces that need to be set on the equipment, which is prone to leakage problems.

[0003] For example, valves are used in aircraft. Aircraft are machines that fly within or outside the atmosphere. Airtightness is a crucial indicator of an aircraft's safety and reliability. The sealed cabin of an aircraft must pass an airtightness check before each operation. Therefore, the sealed cabin of an aircraft must have functions such as inflation, deflation, and safety depressurization. The current design of the sealed cabin of an aircraft is shown in the attached figure. Figure 1 As shown. An inflation valve 100 is installed inside the sealed chamber 400 for pressurizing and leak detection. An exhaust valve 200 is installed in the sealed chamber 400 to release the leak detection gas injected through the inflation valve 100. To ensure the safety of the sealed chamber 400, a safety valve 300 is generally installed for pressure relief, ensuring that the pressure in the sealed chamber 400 remains within the safe operating pressure range. The inflation valve 100 and exhaust valve 200 are only for ground leak detection operations and are not needed during flight. However, due to the large number and variety of valves, the sealed chamber 400 requires numerous connection interfaces, resulting in a higher risk of airtight leakage during operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-functional valve that can satisfy the functions of inflation, deflation, and safe pressure relief, and reduce the connection interface and leakage risk of the sealed chamber.

[0005] The content of this invention includes: The main valve body has an interface I at one end and an interface II at the other end. The main valve body has a main channel connecting the interface I and the interface II inside. A limiting seat is provided at one end of the main channel connecting the interface I inside the main valve body, and a positioning sleeve is provided at one end of the main channel connecting the interface II inside the main valve body. The main valve core is disposed in the main channel. One end of the main valve core faces the limiting seat, and a guide boss is provided on the side of the main valve core at this end. An exhaust port is provided on the guide boss. The other end of the main valve core passes through the positioning sleeve, and an exhaust gap is provided between the main valve core and the inner side of the positioning sleeve. A spring is sleeved on the outside of the main valve core and located between the guide boss and the positioning sleeve; An auxiliary valve body is provided with an interface Ⅳ, and one end of the auxiliary valve body is provided with an interface Ⅲ for detachable connection with interface Ⅱ. An auxiliary flow channel connecting interface Ⅲ and interface Ⅳ is provided inside the auxiliary valve body. An auxiliary piston is disposed in the auxiliary flow channel and located between the end of the auxiliary valve body opposite to the interface III. One end of the auxiliary piston is detachably connected to the end of the main valve core that passes through the positioning sleeve. The auxiliary piston can move along the auxiliary flow channel under external force to drive the main valve core to move axially along the main flow channel.

[0006] Furthermore, the main valve core has a locking pin at one end passing through the positioning sleeve, and the auxiliary piston has a slot that cooperates with the locking pin; or, the auxiliary piston has a locking pin, and the main valve core has a slot that cooperates with the locking pin at one end passing through the positioning sleeve, and the auxiliary piston and the end of the main valve core passing through the positioning sleeve are detachably connected by the cooperation of the locking pin and the slot.

[0007] Furthermore, the main valve core has a channel I inside, with one end of the main valve core facing the limiting seat closed, and one end of the main valve core passing through the positioning sleeve communicating with the channel I. The side of the main valve core has an air hole I communicating with the channel I, and the air hole I is located between the guide boss and the positioning sleeve on the side of the main valve core. The auxiliary piston has a channel II inside, with one end of the auxiliary piston facing the main valve core communicating with the channel II, and the end of the auxiliary piston connected to the auxiliary valve core closed. The side of the auxiliary piston has an air hole II communicating with the channel II.

[0008] Furthermore, it also includes an auxiliary valve core. The auxiliary valve body has a mounting hole at one end opposite to interface III that communicates with the auxiliary flow channel. The auxiliary valve core passes through the mounting hole and can rotate within the mounting hole under external force. The end of the auxiliary valve core located in the auxiliary flow channel is threadedly connected to the closed end of the auxiliary piston, and the auxiliary piston and the inner wall of the auxiliary flow channel are axially slidingly sealed.

[0009] Furthermore, the auxiliary piston includes a piston body and a piston sleeve. The piston body is axially slidably sealed to the inner wall of the auxiliary flow channel. The auxiliary valve core is threadedly connected to the piston body. One end of the piston sleeve is fixed to the piston body. Both the channel II and the vent II are provided on the piston sleeve.

[0010] Furthermore, it also includes a limiting sleeve, wherein the end of the auxiliary valve core opposite to the auxiliary piston passes through the mounting hole and is located outside the end of the auxiliary valve body where the mounting hole is provided, and a limiting boss is provided on the side of the auxiliary valve core located outside the auxiliary valve body. The limiting sleeve is fitted on the auxiliary valve core and connected to the end of the auxiliary valve body where the mounting hole is provided, and the limiting boss is located between the limiting sleeve and the end face of the auxiliary valve body where the mounting hole is provided.

[0011] Furthermore, it also includes a handle, which is disposed on one end of the auxiliary valve core located outside the limiting sleeve.

[0012] Furthermore, the positioning sleeve is threadedly connected to the inside of the main valve body. By rotating the positioning sleeve, the axial position of the positioning sleeve inside the main valve body can be adjusted.

[0013] Furthermore, the positioning sleeve is provided with an adjustment groove at the end opposite to the spring.

[0014] Furthermore, a sealing gasket is provided at the end of the main valve core facing the limiting seat.

[0015] The beneficial effects of this invention are that the main valve body, main valve core, spring, and positioning sleeve together form a pressure relief valve body. This pressure relief valve body can be used independently. When inflation and deflation are required, there is no need to additionally install inflation and deflation valves on the target equipment. Instead, auxiliary valve bodies and pistons can be added to the aforementioned pressure relief valve body to form an inflation or deflation valve to meet the inflation and deflation functions. The overall operation is simple. When applied to target equipment that needs to be tested by inflation and deflation before operation and requires pressure relief during operation, only one valve interface needs to be set on the target equipment, reducing the risk of leakage during operation and improving the safety and reliability of the target equipment.

[0016] Compared to the method of setting only one valve interface on the target equipment, installing a pressure relief valve body on the valve interface during operation, and then removing the pressure relief valve body each time the equipment is used to install an inflation valve and an exhaust valve for testing, this invention uses the pressure relief valve body as an intermediate conductor for inflation and exhaust operations. Therefore, the pressure relief valve body does not need to be removed from the valve interface during pressure relief, inflation, and exhaust operations, avoiding the decrease in the airtightness of the valve interface caused by frequent disassembly and improving the safety and reliability of the target equipment operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the valve setup on an existing airtight chamber.

[0018] Figure 2 This is a schematic diagram of the structure of the multifunctional valve of the present invention.

[0019] Figure 3This is a longitudinal sectional view of the multifunctional valve of the present invention.

[0020] Figure 4 This is a schematic diagram of the main valve core of the present invention.

[0021] Figure 5 This is a schematic diagram of the auxiliary piston of the present invention.

[0022] Figure 6 This is a schematic diagram showing the connection between the main valve core and the auxiliary piston of the present invention.

[0023] Figure 7 This is a schematic diagram of the positioning sleeve of the present invention.

[0024] Figure 8 This is a schematic diagram of the auxiliary valve core of the present invention.

[0025] In the diagram: 1. Main valve body; 11. Interface I; 12. Interface II; 13. Limit seat; 2. Main valve core; 21. Guide boss; 211. Exhaust port; 22. Positioning boss; 23. Channel I; 24. Air hole I; 25. Locking pin; 26. Sealing gasket; 3. Spring; 4. Positioning sleeve; 41. Guide sleeve; 42. Adjusting groove; 5. Auxiliary valve body; 51. Interface III; 52. Interface IV; 6. Auxiliary piston; 61. Piston Body; 611, Sealing Ring I; 62, Piston Sleeve; 621, Channel II; 622, Air Hole II; 623, Slot; 7, Auxiliary Valve Core; 71, Centering Boss; 72, Limiting Boss; 73, Hexagonal Boss; 74, Threaded Section; 8, Limiting Sleeve; 9, Handle; 10, Locking Nut; 20, Bolt; 30, Sealing Ring II; 100, Inflation Valve; 200, Exhaust Valve; 300, Safety Valve; 400, Sealed Chamber. Detailed Implementation

[0026] like Figures 2-8 As shown, the present invention includes a main valve body 1, a main valve core 2, a spring 3, an auxiliary valve body 5, and an auxiliary piston 6.

[0027] One end of the main valve body 1 is provided with interface I11, which is used for valve connection on the target device. The other end is provided with interface II12. The main valve body 1 has a main channel, which is connected to interface I11 and interface II12 at both ends. The main valve body 1 has an inner diameter variation area at the end where the main channel connects to interface I11. This inner diameter variation area forms a limiting seat 13 inside the main valve body 1. The main valve body 1 has a positioning sleeve 4 at the end where the main channel connects to interface II12.

[0028] The main valve core 2 is disposed in the main channel. One end of the main valve core 2 is positioned towards the limiting seat 13, and a guide boss 21 is provided on the side of the end of the main valve core 2. An exhaust port 211 is provided on the guide boss 21 so that gas can flow from one side of the guide boss 21 to the other side. The other end of the main valve core 2 passes through the positioning sleeve 4, and an exhaust gap is formed between the outer side of the main valve core 2 and the inner side of the positioning sleeve 4.

[0029] The spring 3 is sleeved on the outside of the main valve core 2 and located between the guide boss 21 and the positioning sleeve 4. The guide boss 21 and the positioning sleeve 4 together limit the two ends of the spring 3.

[0030] The auxiliary valve body 5 is provided with interface IV 52, and one end of the auxiliary valve body 5 is provided with interface III 51. Interface III 51 is used for detachable connection with interface II 12. The detachable connection is made by bolt 20, and a sealing ring II 30 is provided between the end faces of interface III 51 and interface II 12 to ensure airtightness. The auxiliary valve body 5 is provided with an auxiliary flow channel connecting interface III 51 and interface IV 52.

[0031] The auxiliary piston 6 is disposed within the auxiliary flow channel and located between interface IV 52 and the end of the auxiliary valve body 5 opposite to interface III 51, to avoid clogging of interface IV 52. One end of the auxiliary piston 6 is detachably connected to the end of the main valve core 2 that passes through the positioning sleeve 4. The auxiliary piston can move within the auxiliary flow channel under external force between interface IV 52 and the end of the auxiliary valve body 5 opposite to interface III 51, thereby driving the main valve core 2 to move axially within the main flow channel.

[0032] Connect interface III 51 and interface II 12, and connect the auxiliary piston 6 and the main valve core 2 through one end of the positioning sleeve 4 to form a multi-functional valve assembly. Then connect interface I 11 to the valve port of the target equipment. Figure 3 Taking the shown perspective as an example, the auxiliary piston 6 is moved away from the main valve core 2, causing the main valve core 2 to move away from interface I11, opening interface I11 and connecting it to the main flow channel. The main flow channel then connects to the auxiliary flow channel, and subsequently to interface IV52. At this time, interface IV52 is used as an inflation port. Connecting interface IV52 to an external inflation device allows inflation of the target device equipped with this functional valve. After the appropriate amount of gas is injected, the auxiliary piston 6 is driven to reset the main valve core 2. Closing interface I11 completes the inflation process. When venting is required, the above operation is repeated. Interface I11 is opened, connecting it to the main flow channel, which then connects to the auxiliary flow channel, and subsequently to interface IV52. Interface IV52 is used as an exhaust port 211 for venting.

[0033] After inflation and deflation are completed, the auxiliary valve body 5 and piston 6 can be removed, and the main valve body 1 and its internal components can be used alone. When the pressure at one end of interface I11 is less than the preset pressure relief value, under the tension of spring 3, the closed end of the main valve core 2 abuts against the limit seat 13, sealing interface I11. When the pressure at one end of interface I11 is greater than the preset pressure relief value, the pressure will push open the closed end of the main valve core 2, and the gas will overflow along the space between interface I11 and the closed end of the main valve core 2, the exhaust port 211, and the exhaust gap, thus achieving pressure relief. That is, in this invention, the main valve body 1, the main valve core 2, the spring 3, and the positioning sleeve 4 together form a pressure relief valve body. This pressure relief valve body can be used independently. When inflation and deflation are required, there is no need to set up an additional inflation valve or exhaust valve on the target equipment. Instead, an auxiliary valve body 5 and piston 6 can be added to the aforementioned pressure relief valve body to form an inflation valve or an exhaust valve to meet the inflation and deflation functions. The overall operation is simple. When applied to target equipment that needs to be tested by inflation and deflation before operation and requires depressurization during operation, only one valve interface needs to be set on the target equipment, which reduces the risk of leakage during operation and improves the safety and reliability of the target equipment.

[0034] Compared to the method of setting only one valve interface on the target equipment, installing a pressure relief valve body on the valve interface during operation, and then removing the pressure relief valve body each time the equipment is used to install an inflation valve and an exhaust valve for testing, this invention uses the pressure relief valve body as an intermediate conductor for inflation and exhaust operations. Therefore, the pressure relief valve body does not need to be removed from the valve interface during pressure relief, inflation, and exhaust operations, avoiding the decrease in the airtightness of the valve interface caused by frequent disassembly and improving the safety and reliability of the target equipment operation.

[0035] In one embodiment of the present invention, the auxiliary piston 6 and the main valve core 2 can be detachably connected by magnetic attraction or threaded connection or other means.

[0036] In a preferred embodiment of the present invention, a locking pin 25 is provided at one end of the main valve core 2 passing through the positioning sleeve 4, and a slot 623 that cooperates with the locking pin 25 is provided on the auxiliary piston 6; or, a locking pin 25 is provided on the auxiliary piston 6, and a slot 623 that cooperates with the locking pin 25 is provided at one end of the main valve core 2 passing through the positioning sleeve 4. The auxiliary piston 6 and the end of the main valve core 2 passing through the positioning sleeve 4 are detachably connected by the cooperation of the locking pin 25 and the slot 623.

[0037] The main valve core 2 has a channel I 23 inside. The end of the main valve core 2 facing the limiting seat 13 is closed. The end of the main valve core 2 passing through the positioning sleeve 4 communicates with the channel I 23. An air hole I 24 communicating with the channel I 23 is opened on the side of the main valve core 2. The air hole I 24 is located on the side of the main valve core 2 between the guide boss 21 and the positioning sleeve 4. The auxiliary piston 6 has a channel II 621 inside. The end of the auxiliary piston 6 facing the main valve core 2 communicates with the channel II 621, and the end of the auxiliary piston 6 connecting to the auxiliary valve core 7 is closed. An air hole II 622 communicating with the channel II 621 is provided on the side of the auxiliary piston 6. The arrangement of the aforementioned channel I 23, air hole I 24, channel II 621, and air hole II 622 can increase the gas flow path while reducing the overall weight of the invention.

[0038] The increase in gas flow path is specifically manifested as follows: When only the main valve body 1, main valve core 2, spring 3, and positioning sleeve 4 are used as a pressure relief valve body, during pressure relief, the gas enters the main flow channel along interface I11 and exhaust port 211, and part of it is discharged along the exhaust gap, while the other part is discharged along channel I2 through vent I24. When the auxiliary valve body 5, auxiliary piston 6, and other accessories are added and the gas is used as a charging valve, when the gas is charged into the auxiliary flow channel along interface IV52, part of the fluid enters the main flow channel along the exhaust gap, while the other part of the gas enters channel II621 through vent II622, and enters the main flow channel through vent I24 along channel I23, and then enters the target equipment along interface I11 through exhaust port 211. When used as an exhaust valve, gas enters the main flow channel through interface I11 and exhaust port 211. Part of the gas is discharged into the auxiliary flow channel along the exhaust gap, while the other part is discharged through vent I24 along channel I2 into channel II 621, and then along vent II 622 into the auxiliary flow channel, finally being discharged together along interface IV 52. The invention also includes an auxiliary valve core 7. One end of the auxiliary valve body 5 opposite to interface III 51 has a mounting hole communicating with the auxiliary flow channel. The auxiliary valve core 7 passes through the mounting hole and can rotate within it under external force. The auxiliary valve core 7 is coaxially arranged with the auxiliary flow channel, and one end of the auxiliary valve core 7 located within the auxiliary flow channel is threadedly connected to the closed end of the auxiliary piston 6. The auxiliary piston 6 and the inner wall of the auxiliary flow channel form an axial sliding seal, meaning the auxiliary piston 6 and the inner wall of the auxiliary flow channel are in a sealed fit. The auxiliary piston 6 can slide axially within the auxiliary flow channel under external force, but cannot rotate circumferentially. When the auxiliary valve core 7 is rotated, the auxiliary piston 6, being threadedly connected to it, moves axially within the auxiliary flow channel, thereby causing the main valve core 2 to move axially within the main flow channel. Since the auxiliary piston 6 and the inner wall of the auxiliary flow channel form an axial sliding seal, the airtightness of both sides of the auxiliary piston 6 is ensured during its movement, guaranteeing reliable inflation operations.

[0039] The auxiliary piston 6 specifically includes a piston body 61 and a piston sleeve 62. A sealing ring I 611 is provided on the side of the piston body 61. The piston body 61 axially slides and seals against the inner wall of the auxiliary flow channel through the sealing ring I 611. The auxiliary valve core 7 is specifically threadedly connected to the piston body 61. The diameter of the piston sleeve 62 is smaller than the diameter of the piston body 61. One end of the piston sleeve 62 is fixed to the piston body 61, forming a closed end of the auxiliary piston 6. The channel II 621 and the vent II 622 are both provided on the piston sleeve 62. In this configuration, the auxiliary piston 6 can form an axial sliding seal with the inner wall of the auxiliary flow channel through the piston body 61 and the sealing ring I 611. Since the piston sleeve 62 with the vent II 622 does not need to cooperate with the inner wall of the auxiliary flow channel, its diameter can be made relatively small. This satisfies gas flow while ensuring a gap between the vent II 622 and the inner wall of the auxiliary flow channel, ensuring that the vent II 622 remains connected to the interface IV 52 during the axial movement of the auxiliary piston 6 along the auxiliary flow channel.

[0040] The specific configuration of the locking pin 25 and the slot 623 is as follows: the locking pin 25 is located at the end of the main valve core 2 that passes through the positioning sleeve 4, and the slot 623 is located at the end of the piston sleeve 62 that is away from the piston body 61, as detailed below. Figures 4-6 As shown, the groove 623 is axially opened along this end of the piston sleeve 62 and then laterally opened to form a bent groove 623 communicating with the channel II 621. The end of the main valve core 2 with the locking pin 25 passes through the end of the piston sleeve 62 with the groove 623, so that the locking pin 25 is axially inserted into the groove 623. Then, by rotating the main valve body 1 or the auxiliary valve body 5, the main valve core 2 and the piston sleeve 62 rotate relative to each other, so that the locking pin 25 moves into the end of the groove 623, i.e. Figure 6 As shown, the connection between the main valve core 2 and the auxiliary piston 6 is realized. The locking pin 25 and the locking groove 623 limit each other, ensuring that the main valve core 2 can move axially with the auxiliary piston 6. This connection method is convenient to disassemble and reassemble and the connection is reliable.

[0041] The present invention also includes a limiting sleeve 8. The end of the auxiliary valve core 7 facing away from the auxiliary piston 6 passes through the mounting hole and is located outside the end of the auxiliary valve body 5 where the mounting hole is provided. A limiting boss 72 is provided on the side of the auxiliary valve core 7 located outside the auxiliary valve body 5. The limiting sleeve 8 is sleeved on the auxiliary valve core 7 and connected to the end of the auxiliary valve body 5 where the mounting hole is provided. It can be detachably connected by threads. The limiting boss 72 is located between the limiting sleeve 8 and the end face of the auxiliary valve body 5 where the mounting hole is provided. The limiting boss 72 can rotate between the limiting sleeve 8 and the end face of the auxiliary valve body 5 where the mounting hole is provided. By setting the limiting sleeve 8 to cooperate with the end of the auxiliary valve body 5 where the mounting hole is provided, the axial direction of the limiting boss 72 can be limited, ensuring that the whole assembly and disassembly are convenient, and while maintaining the rotation function of the auxiliary valve core 7, it is ensured that it will not move axially. In particular, the auxiliary valve core 7 is preferably provided with a centering boss 71 in the area of ​​the mounting hole, and the centering boss 71 is fitted with the mounting hole with a clearance to ensure that the auxiliary valve core 7 will not be eccentric.

[0042] The invention also includes a handle 9, which is disposed on the auxiliary valve core 7 at one end outside the limiting sleeve 8 to facilitate rotation of the auxiliary valve core 7. The auxiliary valve core 7, at the end outside the limiting sleeve 8, has a hexagonal guide 73 on its side. The handle 9 has an internal hexagonal hole and is fitted onto the hexagonal guide 73 for circumferential limiting. The auxiliary valve core 7, at the end outside the limiting sleeve 8, also has a threaded section 74, and a locking nut 10 is connected to the threaded section 74 to axially lock the handle 9. This arrangement facilitates assembly and disassembly and effectively ensures the normal use of the handle 9.

[0043] The positioning sleeve 4 is threadedly connected to the inside of the main valve body 1. By rotating the positioning sleeve 4, its axial position inside the main valve body 1 can be adjusted, thereby adjusting the compression of the spring 3 and thus adjusting the pressure relief of the pressure relief valve body. At the same time, the threaded positioning sleeve 4 can also be easily removed, facilitating the replacement or installation of components such as the spring 3 and the main valve core 2 inside the main valve body 1.

[0044] The positioning sleeve 4 has an adjustment groove 42 at its end opposite to the spring 3. The shape of the adjustment groove 42 is the same as the shape of the tool end used to rotate the positioning sleeve 4. For example, when the tool end used to rotate the positioning sleeve 4 is straight, the adjustment groove 42 is straight; when the tool end used to rotate the positioning sleeve 4 is of other shapes, the adjustment groove 42 is of other shapes, so that the tool can be inserted and the positioning sleeve 4 can be rotated. A guide sleeve 41 is provided inside the positioning sleeve 4. The height of the guide sleeve 41 is less than the height of the positioning sleeve 4. The main valve core 2 specifically passes through the guide sleeve 41 inside the positioning sleeve 4, and there is a clearance fit between the outer side of the main valve core 2 and the inner side of the guide sleeve 41, allowing gas to flow through while ensuring that the main valve core 2 is not eccentric. Simultaneously, the end of the spring 3 facing the positioning sleeve 4 can be inserted inside the positioning sleeve 4 and abut against the guide sleeve 41, achieving centering of that end of the spring 3.

[0045] A positioning boss 22 is provided on the side of the guide boss 21 facing the spring 3. The end of the spring 3 facing the guide boss 21 is sleeved on the positioning boss 22 to center that end of the spring 3. Figure 4 As shown, the exhaust port 211 is specifically located on the side of the guide boss 21. A sealing gasket 26 is provided at the end of the main valve core 2 facing the limiting seat 13. The main valve core 2 abuts against the limiting seat 13 through the sealing gasket 26, ensuring the airtightness of the interface I11 when no pressure relief is required.

[0046] Taking the application of this multi-functional valve on the sealed compartment 400 of an aircraft as an example, the operation method of the present invention is as follows: Install the main valve body 1, main valve core 2, spring 3, and positioning sleeve 4 as follows: Figure 3 Assemble the device as shown. Adjust the compression of spring 3 by rotating positioning sleeve 4 to set the safe pressure relief value of the pressure relief valve body.

[0047] The compression of spring 3 is S, and the stiffness of spring 3 is K. The safety pressure of the sealed chamber 400 is P. The diameter of interface I11 on the main valve body 1 is D. Then: K*S=PπD 2 / 4 After setting the safe discharge pressure of the pressure relief valve body, connect interface I11 to the valve interface of the sealing chamber 300. Auxiliary valve body 5, auxiliary piston 6, auxiliary valve core 7, limit sleeve 8, handle 9, and other accessories are then installed according to... Figure 3 The components are assembled to form an auxiliary valve body mounted on the pressure relief valve body.

[0048] When the sealed chamber 400 needs to be inflated, turn the handle 9 to drive the auxiliary piston 6 and the main valve core 2 upward through the auxiliary valve core 7. The lower end of the main valve core 2 opens with the limit seat 13, and gas is injected into the sealed chamber 400 through the interface IV 52. After the gas is fully inflated, turn the handle 9 in the opposite direction to drive the main valve core 2 downward, so that the valve core 2 closes with the limit seat 13, and the inflation is completed.

[0049] When the sealed chamber 400 is venting, the same procedure as above shall be followed. At this time, interface IV52 shall be used as the vent outlet.

[0050] After inflation and deflation are completed, the auxiliary valve body, consisting of auxiliary valve body 5, auxiliary piston 6, auxiliary valve core 7, limit sleeve 8, handle 9 and other accessories, is removed, leaving only the pressure relief valve body formed by main valve body 1, main valve core 2, spring 3 and positioning sleeve 4, and keeping interface I11 connected to the sealed chamber 400 for safe pressure relief.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0052] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A multifunctional valve, characterized in that it comprises: The main valve body (1) has an interface I (11) at one end and an interface II (12) at the other end. The main valve body (1) has a main channel connecting the interface I (11) and the interface II (12) inside. The main valve body (1) has a limited seat (13) at one end of the main channel connecting the interface I (11) and a positioning sleeve (4) at one end of the main valve body (1) connecting the main channel to the interface II (12). The main valve core (2) is located in the main channel. One end of the main valve core (2) is located towards the limiting seat (13), and a guide boss (21) is provided on the side of the end of the main valve core (2). An exhaust port (211) is provided on the guide boss (21). The other end of the main valve core (2) passes through the positioning sleeve (4), and an exhaust gap is provided between the main valve core (2) and the inner side of the positioning sleeve (4). Spring (3), which is sleeved on the outside of the main valve core (2) and located between the guide boss (21) and the positioning sleeve (4); An auxiliary valve body (5) is provided with an interface Ⅳ (52), and one end of the auxiliary valve body (5) is provided with an interface Ⅲ (51) for detachable connection with interface Ⅱ (12). An auxiliary flow channel connecting interface Ⅲ (51) and interface Ⅳ (52) is provided inside the auxiliary valve body (5). The auxiliary piston (6) is located in the auxiliary flow channel and between the interface IV (52) and the end of the auxiliary valve body (5) away from the interface III (51). One end of the auxiliary piston (6) is detachably connected to the end of the main valve core (2) that passes through the positioning sleeve (4). The auxiliary piston (6) can move along the auxiliary flow channel under external force to drive the main valve core (2) to move axially along the main flow channel. The main valve core (2) has a channel I (23) inside. The end of the main valve core (2) facing the limiting seat (13) is closed. The end of the main valve core (2) passing through the positioning sleeve (4) is connected to the channel I (23). The side of the main valve core (2) is provided with an air hole I (24) that connects to the channel I (23). The air hole I (24) is located between the guide boss (21) and the positioning sleeve (4) on the side of the main valve core (2). The auxiliary piston (6) has a channel II (621) inside. The end of the auxiliary piston (6) facing the main valve core (2) is connected to the channel II (621). The end of the auxiliary piston (6) connected to the auxiliary valve core (7) is closed. The side of the auxiliary piston (6) is provided with an air hole II (622) that connects to the channel II (621). It also includes an auxiliary valve core (7). The auxiliary valve body (5) has an installation hole that communicates with the auxiliary flow channel at one end opposite to the interface III (51). The auxiliary valve core (7) passes through the installation hole and can rotate along the installation hole under the action of external force. The auxiliary valve core (7) is located in the auxiliary flow channel and is threadedly connected to the closed end of the auxiliary piston (6). The auxiliary piston (6) and the inner wall of the auxiliary flow channel are axially slidingly sealed.

2. The multifunctional valve as described in claim 1, characterized in that, The main valve core (2) is provided with a locking pin (25) at one end of the positioning sleeve (4), and the auxiliary piston (6) is provided with a groove (623) that cooperates with the locking pin (25). Alternatively, the auxiliary piston (6) is provided with a locking pin (25), and the main valve core (2) is provided with a groove (623) that cooperates with the locking pin (25) at one end of the positioning sleeve (4). The auxiliary piston (6) and the end of the main valve core (2) that passes through the positioning sleeve (4) are detachably connected by the cooperation of the locking pin (25) and the groove (623).

3. The multifunctional valve as described in claim 1, characterized in that, The auxiliary piston (6) includes a piston body (61) and a piston sleeve (62). The piston body (61) is axially slidingly sealed to the inner wall of the auxiliary flow channel. The auxiliary valve core (7) is threadedly connected to the piston body (61). One end of the piston sleeve (62) is fixed to the piston body (61). Channel II (621) and air hole II (622) are both provided on the piston sleeve (62).

4. The multifunctional valve as described in claim 1, characterized in that, It also includes a limiting sleeve (8), the end of the auxiliary valve core (7) away from the auxiliary piston (6) passes through the mounting hole and is located outside the end of the auxiliary valve body (5) where the mounting hole is provided. A limiting boss (72) is provided on the side of the auxiliary valve core (7) located outside the auxiliary valve body (5). The limiting sleeve (8) is sleeved on the auxiliary valve core (7) and connected to the end of the auxiliary valve body (5) where the mounting hole is provided. The limiting boss (72) is located between the limiting sleeve (8) and the end face of the auxiliary valve body (5) where the mounting hole is provided.

5. The multifunctional valve as described in claim 4, characterized in that, It also includes a handle (9), which is disposed on the auxiliary valve core (7) at one end outside the limiting sleeve (8).

6. The multifunctional valve according to any one of claims 1-5, characterized in that, The positioning sleeve (4) is threadedly connected to the inside of the main valve body (1). By rotating the positioning sleeve (4), the axial position of the positioning sleeve (4) inside the main valve body (1) can be adjusted.

7. The multifunctional valve as described in claim 6, characterized in that, The positioning sleeve (4) has an adjustment groove (42) at the end away from the spring (3).

8. The multifunctional valve as described in any one of claims 1-5 and 7, characterized in that, The main valve core (2) is provided with a sealing gasket (26) at one end facing the limiting seat (13).

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