A safety valve with both temperature protection and pressure protection functions

Abstract

The present application belongs to the field of pressure vessel or pressure equipment protection and is a safety valve with both temperature protection and pressure protection functions, including a static valve body, a dynamic valve body, and a valve body drive mechanism; the valve body drive mechanism includes a fixing member, a driving member, and a sealing member; when the temperature reaches a temperature higher than the safety temperature value T, the hot melt in the internal channel of the static valve body will melt when the temperature exceeds the safety temperature value T, and the channel will open to release the gas inside the equipment; when the safety pressure value P is reached, the driving member operates and controls the fixing member and the sealing member to disengage, and after the sealing member and the fixing member disengage, the sealing member drives the dynamic valve body to move and seal the cavity, and the dynamic valve body and the static valve body fit together. Therefore, when the temperature is high, the equipment pressure will not rise too much due to the high temperature, and when the pressure is released, the air will not be completely released at once, but a certain safety pressure will be retained for the equipment to use, so that the equipment can be used multiple times.

Description

Technical Field

[0001] The present application relates to the field of pressure vessel or pressure equipment protection, and in particular to a safety valve with both temperature protection and pressure protection functions. Background Art

[0002] Take, for example, the thermally-melted safety valve on an aircraft tire hub. Its primary function is temperature protection: when the hub temperature exceeds a certain threshold, the valve opens, releasing tire pressure. However, the main drawback of this type of safety valve is that once the valve opens due to overheating, it completely releases the internal tire pressure until the tire pressure drops to zero. This causes the tire to lose its support and rolling function, necessitating replacement before continued use, resulting in a significant waste of resources.

[0003] Therefore, how to prevent the tire pressure from dropping to zero, protect the tire pressure, and enable the tire to be used repeatedly is a problem that needs to be solved. Summary of the Invention

[0004] The purpose of the present application is to provide a safety valve with both temperature protection and pressure protection functions, so as to solve the problem in the prior art that the safety valve needs to be replaced once it is opened.

[0005] The technical solution of the present application is: a safety valve with both temperature protection and pressure protection functions, comprising a static valve body, a dynamic valve body, and a valve body drive mechanism; the static valve body is arranged on an equipment mounting base, and the inner end of the static valve body is inserted into the equipment mounting base, and the dynamic valve body is arranged coaxially with the static valve body and is arranged corresponding to the outer end of the static valve body;

[0006] The static valve body is provided with a cavity communicating with the inside and outside, the cavity being connected to the inside of the equipment mounting base. A hot melt is provided in the cavity to seal the cavity, and the hot melt can melt at a certain temperature. The movable valve body can be inserted into the cavity of the static valve body to seal the cavity.

[0007] The valve body driving mechanism includes a fixing part, a driving part and a sealing part. The sealing part is connected to the dynamic valve body, and the fixing part can be engaged with the sealing part. When the fixing part and the sealing part are engaged, the static valve body and the dynamic valve body are separated from each other; the driving part is connected to the fixing part, and the driving part can sense the pressure change at the cavity outlet and control the fixing part to disengage from the sealing part after the pressure drops to a certain level. After the sealing part and the fixing part are disengaged, the sealing part drives the dynamic valve body to move to close the cavity.

[0008] Preferably, the driving member includes a first connecting rod, a contact body and a pressure diaphragm; an inner concave cavity is provided on the movable valve body, the pressure diaphragm is coaxially arranged in the inner concave cavity, and a closed cavity is formed between the pressure diaphragm and the inside of the inner concave cavity, the pressure diaphragm can move according to different pressures, the contact body is coaxially connected to the pressure diaphragm, and the contact body moves with the pressure diaphragm; there are multiple groups of the first connecting rods and they are arranged at intervals along the circumferential direction of the movable valve body, one end of the first connecting rod is hinged to the contact body, and the other end is hinged to the fixing member; a bracket is provided on the movable valve body, the bracket is arranged between the fixing member and the contact body, the first connecting rod is hinged to the bracket, and the first connecting rod, the contact body and the fixing member form a lever structure.

[0009] Preferably, a first bolt group is hinged between the first connecting rod and the contact body, a second bolt group is hinged between the first connecting rod and the fixing member, and a third bolt group is hinged between the first connecting rod and the bracket.

[0010] Preferably, the fixing member includes an actuating block and an actuating rod; the actuating block is fixed to the outer end of the static valve body, a stop groove is provided in the actuating block, one end of the actuating rod is hinged to the driving member, and the other end passes through the dynamic valve body and is inserted into the stop groove, and a key is provided on the end of the actuating rod inserted into the stop groove, and the key is engaged in the stop groove, and when the pressure at the cavity outlet drops to a certain value, the driving member drives the key on the actuating rod to separate from the stop groove;

[0011] A compression spring and a stop key are provided on the actuating block. The compression spring is connected between the actuating block and the wall surface of the static valve body. The stop key is engaged with the sealing member. When the engaging key is engaged with the stop groove, the compression spring is in a compressed state between the static valve body and the actuating block. When the engaging key is separated from the stop groove, the compression spring stretches and drives the stop key to separate from the sealing member.

[0012] Preferably, there are multiple groups of sealing parts and they are arranged at intervals along the circumference of the static valve body. The sealing parts include a tension spring and a second connecting rod. A blind hole is opened at the position of the static valve body corresponding to the sealing part. The tension spring and the second connecting rod are both inserted into the blind hole. The tension spring is located on the inside and the second connecting rod is located on the outside. One end of the second connecting rod is connected to the tension spring and the other end is fixedly connected to the movable valve body. The side wall of the second connecting rod is snap-fitted with the fixing part, and when the second connecting rod is snap-fitted with the fixing part, the tension spring is in an extended state; when the second connecting rod is separated from the fixing part, the tension spring pulls the second connecting rod and the movable valve body to move toward the static valve body.

[0013] Preferably, a first sealing groove is provided on the outer side wall of the static valve body, and a first sealing ring is provided in the first sealing groove and is tightly fitted with the equipment mounting base; a second sealing groove is provided on the inner side wall of the movable valve body, and a second sealing ring is provided in the second sealing groove and is tightly fitted with the static valve body.

[0014] Preferably, a conical groove is provided at the front end of the static valve body at a position corresponding to the outside of the cavity, and a frustum is provided on the dynamic valve body to match the conical groove. When the static valve body and the dynamic valve body are in contact, the frustum is inserted into the conical groove.

[0015] The present invention discloses a safety valve with both temperature and pressure protection functions, comprising a static valve body, a movable valve body, and a valve body drive mechanism. The valve body drive mechanism comprises a fixing member, a driving member, and a sealing member. When the temperature reaches a temperature higher than a safety temperature value T, the hot melt in the internal channel of the static valve body melts when the temperature exceeds the safety temperature value T, and the channel opens to release the gas inside the device. When the safety pressure value P is reached, the driving member operates and controls the fixing member to disengage from the sealing member. After the sealing member and the fixing member disengage, the sealing member drives the movable valve body to move, sealing the cavity, and the movable valve body and the static valve body fit together. Therefore, when the temperature is high, the pressure of the device will not rise excessively due to the high temperature. When the pressure is released, the gas will not be completely released at once, but a certain safety pressure will be retained for the device to use, thus allowing the device to be used multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0017] Figure 1 This is a cross-sectional view of the overall structure of this application;

[0018] Figure 2 This is a schematic diagram of the connection structure between the static valve body and the dynamic valve body when the safety valve is not triggered in this application;

[0019] Figure 3 This is a schematic diagram of the connection structure between the static valve body and the dynamic valve body when the safety valve is triggered in this application;

[0020] Figure 4 This is a schematic diagram of the exploded structure of the valve body and driving parts of this application;

[0021] Figure 5 This is a schematic diagram of the deformation structure of the pressure diaphragm of this application when it is subjected to different pressures;

[0022] Figure 6 This is a schematic diagram of the actuator structure of this application.

[0023] 1. Equipment mounting base; 2. First sealing ring; 3. Static valve body; 4. Tension spring; 5. Actuating block; 6. Moving valve body; 7. Actuating rod; 8. First connecting rod; 9. Contact body; 10. Pressure diaphragm; 11. Second sealing ring; 12. Second connecting rod; 13. Hot melt; 14. Stop key; 15. Compression spring; 16. Stop groove; 17. First bolt group; 18. Second bolt group; 19. Third bolt group; 20. Bracket; 21. Conical groove; 22. Cone frustum. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0025] A safety valve with both temperature protection and pressure protection functions, such as Figure 1 As shown, it is arranged on the equipment installation base 1. This application takes the equipment installation base 1 as a tire as an example for explanation.

[0026] It includes a static valve body 3, a dynamic valve body 6 and a valve body driving mechanism; the static valve body 3 is arranged on the equipment installation base 1 and the inner end of the static valve body 3 is inserted into the equipment installation base 1, the dynamic valve body 6 is coaxially arranged with the static valve body 3 and the dynamic valve body 6 is arranged corresponding to the outer end of the static valve body 3.

[0027] The static valve body 3 is provided with a cavity that is connected to the inside and outside, and the cavity is connected to the inside of the equipment installation base 1. A hot melt 13 is provided in the cavity to seal the cavity, and the hot melt 13 can melt at a certain temperature; the dynamic valve body 6 can be inserted into the cavity of the static valve body 3 to seal the cavity.

[0028] The valve body driving mechanism includes a supporting assembly and a limiting assembly, the supporting assembly corresponds to a fixing member, a driving member and a sealing member, the sealing member is connected to the movable valve body 6, the fixing member can be engaged with the sealing member, and when the fixing member and the sealing member are engaged, the static valve body 3 and the movable valve body 6 are separated from each other; the driving member is connected to the fixing member, and the driving member can sense the pressure change at the cavity outlet and control the fixing member to disengage from the sealing member after the pressure drops to a certain level. After the sealing member and the fixing member are disengaged, the sealing member drives the movable valve body 6 to move to close the cavity.

[0029] Assume that the safety temperature value of the safety valve working place is T and the safety pressure value is P.

[0030] When the temperature is lower than the safety temperature value T, the safety valve will not be triggered. The safety valve diagram in this state is as follows Figure 5 At this time, the dynamic valve body 6 and the static valve body 3 are separated from each other, the driving member and the fixing member are engaged, and the driving member and the fixing member are in a stable connection state, such as Figure 2 shown.

[0031] When the temperature reaches a value higher than the safety temperature T, the hot melt 13 in the internal channel of the static valve body 3 will melt when the temperature exceeds the safety temperature T, and the channel will open to release the gas inside the device, and the internal pressure P inner Continuously decreasing; as the internal pressure P innerWhen the pressure reaches the safety value P, the driving part works and controls the fixing part to disengage from the sealing part. After the sealing part and the fixing part are disengaged, the sealing part drives the moving valve body 6 to move and seal the cavity. The moving valve body 6 and the static valve body 3 fit together. Figure 3 As shown, further release of gas inside the device is prevented, and the internal pressure of the device is P inner Can maintain the set safety pressure P.

[0032] Therefore, when the temperature is high, the tire pressure will not rise too much due to the high temperature. When the pressure is released, the air will not be completely deflated at one time. A certain safety pressure will be retained for the tire to use, so that the tire can be used many times.

[0033] Combine Figure 4 Preferably, the driving member includes a first connecting rod 8, a contact body 9 and a pressure diaphragm 10; an inner concave cavity is provided on the movable valve body 6, and the pressure diaphragm 10 is coaxially arranged in the inner concave cavity. A closed cavity is formed between the pressure diaphragm 10 and the inside of the inner concave cavity, and the pressure diaphragm 10 can move according to different pressures. The contact body 9 is coaxially connected to the pressure diaphragm 10, and the contact body 9 moves with the pressure diaphragm 10; there are multiple groups of first connecting rods 8 and they are arranged at intervals along the circumferential direction of the movable valve body 6, one end of the first connecting rod 8 is hinged to the contact body 9, and the other end is hinged to the fixing member; a bracket 20 is provided on the movable valve body 6, and the bracket 20 is arranged between the fixing member and the contact body 9. The first connecting rod 8 is hinged to the bracket 20, and the first connecting rod 8, the contact body 9 and the fixing member form a lever structure.

[0034] Combine Figure 5 Since a sealed cavity is formed between the movable valve body 6 and the pressure diaphragm 10, the pressure in the sealed cavity remains unchanged, assuming it is P0. When the hot melt 13 melts, the pressure in the equipment mounting base 1 is released to the outside of the movable valve body 6 through the cavity, that is, the pressure outside the pressure diaphragm 10 is P inner When the pressure diaphragm 10 is at position P1, the internal pressure of the equipment is P inner = P0- P1; when the pressure diaphragm 10 is at position P2, the internal pressure of the equipment is P inner = P0- P2. When the internal pressure of the equipment is P inner When the pressure drops to the safety value P, the first connecting rod 8 pulls the fixing part toward the inside of the dynamic valve body 6 through the lever structure, thereby driving the fixing part to separate from the sealing part, and then the dynamic valve body 6 is driven by the sealing part to fit with the static valve body 3 and close the static valve body 3.

[0035] Preferably, a first bolt group 17 is hinged between the first connecting rod 8 and the contact body 9, a second bolt group 18 is hinged between the first connecting rod 8 and the fixing member, and a third bolt group 19 is hinged between the first connecting rod 8 and the bracket 20, which makes the installation simple and stable.

[0036] Combine Figure 6 Preferably, the fixing member includes an actuating block 5 and an actuating rod 7; the outer end of the static valve body 3 is evenly distributed with three grooves along the circumferential direction of 120°, the actuating block 5 is fixed in the groove at the outer end of the static valve body 3, and a stop groove 16 is opened in the actuating block 5. One end of the actuating rod 7 is hinged to the first connecting rod 8, and the other end passes through the dynamic valve body 6 and is inserted into the stop groove 16. The end of the actuating rod 7 inserted into the stop groove 16 is provided with a key, and the key is snap-fitted into the stop groove 16. The width of the stop groove 16 is greater than the diameter of the actuating rod 7. When the pressure at the cavity outlet drops to a certain value, the driving member drives the key on the actuating rod 7 to separate from the stop groove 16.

[0037] A compression spring 15 and a stop key 14 are provided on the actuating block 5. The compression spring 15 is connected between the actuating block 5 and the wall of the static valve body 3. The stop key 14 is engaged with the sealing member. When the engaging key is engaged with the stop groove 16, the compression spring 15 is in a compressed state between the static valve body 3 and the actuating block 5; when the engaging key is separated from the stop groove 16, the compression spring 15 stretches and drives the stop key 14 to separate from the sealing member.

[0038] When the first connecting rod 8 is pulled by the contact body 9 and flips over, it drives the actuating rod 7 at the other end to move outward of the valve body 6 under the lever structure. As the internal pressure P inner As the pressure continues to decrease, the actuating rod 7 continues to move into the static valve body 3 until the safety pressure P is reached, and the key on the actuating rod 7 is completely disengaged from the stop groove 16.

[0039] When the actuating rod 7 is completely disengaged from the actuating block 5, the actuating rod 7 can slide in the stop groove 16, and under the action of the compression spring 15, the actuating block 5 moves laterally, pushing the stop key 14 to separate from the sealing member, and the cooperation is simple and stable.

[0040] Preferably, there are multiple groups of sealing parts and they are arranged at intervals along the circumference of the static valve body 3. The sealing parts include a tension spring 4 and a second connecting rod 12. The outer end of the static valve body 3 has three blind holes evenly distributed along the circumferential direction of 120°. The tension spring 4 and the second connecting rod 12 are both inserted into the blind holes, the tension spring 4 is located on the inside and the second connecting rod 12 is located on the outside. One end of the second connecting rod 12 is connected to the tension spring 4 and the other end is integrally connected to the movable valve body 6. The side wall of the second connecting rod 12 is snap-fitted with the actuating block 5, and when the second connecting rod 12 is snap-fitted with the actuating block 5, the tension spring 4 is in an extended state; when the second connecting rod 12 is separated from the actuating block 5, the tension spring 4 pulls the second connecting rod 12 and the movable valve body 6 toward the direction close to the static valve body 3 until the movable valve body 6 is fitted with the static valve body 3 to complete the closure. The second connecting rod 12 is coaxially arranged with the tension spring 4 to make the drive stable.

[0041] Preferably, a first sealing groove is provided on the outer wall of the static valve body 3, and a first sealing ring 2 is provided in the first sealing groove, which is tightly fitted with the equipment mounting base 1; a second sealing groove is provided on the inner wall of the movable valve body 6, and a second sealing ring 11 is provided in the second sealing groove, which can be tightly fitted with the static valve body 3, so as to prevent further release of gas inside the equipment.

[0042] Preferably, a conical groove 21 is provided at the front end of the static valve body 3 at a position corresponding to the outside of the cavity, and the movable valve body 6 is provided with a frustum 22 that cooperates with the conical groove 21. When the static valve body 3 and the movable valve body 6 are in contact with each other, the frustum 22 is inserted into the conical groove 21. When the movable valve body 6 and the static valve body 3 are in contact with each other, the cooperation between the frustum 22 and the conical groove 21 makes the two have a larger contact area, so as to ensure a stable seal.

[0043] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A safety valve with both temperature protection and pressure protection functions, characterized by: The invention comprises a static valve body (3), a dynamic valve body (6) and a valve body driving mechanism; the static valve body (3) is arranged on an equipment installation base (1) and the inner end of the static valve body (3) is inserted into the equipment installation base (1); the dynamic valve body (6) is coaxially arranged with the static valve body (3) and the dynamic valve body (6) is arranged corresponding to the outer end of the static valve body (3); The static valve body (3) is provided with a cavity communicating with the inside and outside, the cavity being communicated with the inside of the equipment installation base (1), and a hot melt (13) is provided in the cavity to seal the cavity, the hot melt (13) being capable of melting at a certain temperature; the movable valve body (6) is capable of being inserted into the cavity of the static valve body (3) to seal the cavity; The valve body driving mechanism includes a fixing member, a driving member and a sealing member, the sealing member is connected to the movable valve body (6), the fixing member can be engaged with the sealing member, and when the fixing member is engaged with the sealing member, the static valve body (3) and the movable valve body (6) are separated from each other; the driving member is connected to the fixing member, the driving member can sense the pressure change at the cavity outlet and control the fixing member to disengage from the sealing member after the pressure drops to a certain level, and after the sealing member and the fixing member are disengaged, the sealing member drives the movable valve body (6) to move and close the cavity; The driving member includes a first connecting rod (8), a contact body (9) and a pressure diaphragm (10); an inner concave cavity is provided on the movable valve body (6), the pressure diaphragm (10) is coaxially arranged in the inner concave cavity, a closed cavity is formed between the pressure diaphragm (10) and the inner concave cavity, the pressure diaphragm (10) can move according to different pressures, the contact body (9) is coaxially connected to the pressure diaphragm (10), and the contact body (9) moves following the pressure diaphragm (10); there are a plurality of first connecting rods (8) and they are arranged at intervals along the circumferential direction of the movable valve body (6), one end of the first connecting rod (8) is hinged to the contact body (9), and the other end is hinged to the fixing member; a bracket (20) is provided on the movable valve body (6), the bracket (20) is arranged between the fixing member and the contact body (9), the first connecting rod (8) is hinged to the bracket (20), and the first connecting rod (8), the contact body (9) and the fixing member form a lever structure.

2. The safety valve with both temperature protection and pressure protection functions according to claim 1, characterized in that: A first bolt group (17) is hinged between the first connecting rod (8) and the contact body (9), a second bolt group (18) is hinged between the first connecting rod (8) and the fixing member, and a third bolt group (19) is hinged between the first connecting rod (8) and the bracket (20).

3. The safety valve with both temperature protection and pressure protection functions according to claim 1, characterized in that: The fixing member includes an actuating block (5) and an actuating rod (7); the actuating block (5) is fixed to the outer end of the static valve body (3); a stop groove (16) is provided in the actuating block (5); one end of the actuating rod (7) is hinged to the driving member, and the other end passes through the dynamic valve body (6) and is inserted into the stop groove (16); a key is provided on the end of the actuating rod (7) inserted into the stop groove (16); the key is engaged in the stop groove (16); when the pressure at the cavity outlet drops to a certain value, the driving member drives the key on the actuating rod (7) to separate from the stop groove (16); The actuating block (5) is provided with a compression spring (15) and a stop key (14). The compression spring (15) is connected between the actuating block (5) and the wall surface of the static valve body (3). The stop key (14) is engaged with the sealing member. When the engagement key is engaged with the stop groove (16), the compression spring (15) is in a compressed state between the static valve body (3) and the actuating block (5); when the engagement key is separated from the stop groove (16), the compression spring (15) stretches and drives the stop key (14) to separate from the sealing member.

4. The safety valve with both temperature protection and pressure protection functions according to claim 1, characterized in that: There are multiple groups of sealing parts and they are arranged at intervals along the circumference of the static valve body (3). The sealing parts include a tension spring (4) and a second connecting rod (12). A blind hole is opened at the position of the static valve body (3) corresponding to the sealing part. The tension spring (4) and the second connecting rod (12) are both inserted into the blind hole. The tension spring (4) is located on the inner side and the second connecting rod (12) is located on the outer side. One end of the second connecting rod (12) is connected to the tension spring (4) and the other end is fixedly connected to the movable valve body (6). The side wall of the second connecting rod (12) is engaged with the fixing part, and when the second connecting rod (12) is engaged with the fixing part, the tension spring (4) is in an extended state; when the second connecting rod (12) is separated from the fixing part, the tension spring (4) pulls the second connecting rod (12) and the movable valve body (6) to move in a direction close to the static valve body (3).

5. The safety valve with both temperature protection and pressure protection functions according to claim 1, characterized in that: A first sealing groove is provided on the outer side wall of the static valve body (3), and a first sealing ring (2) is provided in the first sealing groove and is in close contact with the equipment mounting base (1); a second sealing groove is provided on the inner side wall of the movable valve body (6), and a second sealing ring (11) is provided in the second sealing groove and is in close contact with the static valve body (3).

6. The safety valve with both temperature protection and pressure protection functions according to claim 1, characterized in that: A conical groove (21) is provided at a position on the front end of the static valve body (3) corresponding to the outer side of the cavity, and a frustum (22) is provided on the dynamic valve body (6) to match the conical groove (21). When the static valve body (3) and the dynamic valve body (6) are in contact with each other, the frustum (22) is inserted into the conical groove (21).

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