A gas pressure regulating valve

Abstract

The present invention discloses a gas pressure regulating valve, which relates to the field of gas pressure regulating technology, and comprises a valve body and a valve cap arranged at the upper end of the valve body, wherein a valve seat and a valve core are arranged inside the valve body, a first through hole is arranged in the middle of the valve seat, a second through hole is arranged in the middle of the valve cap, one end of the valve core passes through the first through hole and extends into the second through hole, and further comprises a static sealing component arranged inside the valve body, one end of the static sealing component is connected to the inner peripheral wall of the valve seat, the other end of the static sealing component is sleeved on the outer peripheral wall of the valve core, an air inlet and an air outlet are arranged on the outer wall of the valve core, the air inlet is in an annular array, the air outlet is in an annular array, a plurality of air flow channels are arranged inside the valve core, one end of each air flow channel is connected to the air inlet, and the other end is connected to the air outlet, and a plurality of air outlets are directly opposite to the other end of the static sealing component. The static sealing component arranged in the present invention can prevent the occurrence of wear and tear, and can ensure the air tightness between the valve core and the valve seat.

Description

Technical Field

[0001] The invention relates to the technical field of air pressure regulation, and in particular to an air pressure regulating valve. Background Art

[0002] Since the internal pressure of a closed container is greatly affected by the ambient temperature, the closed containers used in aerospace products are generally required to have an air pressure regulation function. That is, when there is a large pressure difference between the inside of the container and the external environment, the container can automatically balance the internal and external pressures through an air pressure regulating valve.

[0003] In the common air pressure regulating valves on the market, the valve core and the valve seat are sealed by a sealing ring. However, this sealing method easily leads to poor sealing performance, thereby affecting the sealing performance of the entire closed container. Summary of the invention

[0004] The object of the present invention is to provide a gas pressure regulating valve for solving the above-mentioned technical problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] 20. The diaphragm of claim 19, wherein the diaphragm has an inner portion that is adapted to engage a spring, and the outer portion of the diaphragm has an inner portion that is adapted to engage a spring. The diaphragm has an inner portion that is adapted to engage a spring. The diaphragm has an inner portion that is adapted to engage a spring. The diaphragm has an inner portion that is adapted to engage a spring.

[0007] Preferably, a groove and the first through hole are sequentially formed in the middle of the valve seat from top to bottom, the groove is communicated with the first through hole, and the static sealing assembly is arranged in the groove.

[0008] Preferably, the first sealing member is further included, and the first sealing member is disposed between the outer edge of the valve seat and the inner peripheral wall of the valve body.

[0009] As a further preference, the static sealing assembly includes a fixed section, a connecting section and a sealing section, wherein the fixed section is injection molded in the side wall of the groove, one end of the connecting section is connected to the fixed section, and the other end of the connecting section is connected to the outer side wall of the sealing section, the sealing section is sleeved on the outer edge of the valve core, and the inner circumferential wall of the sealing section seals a plurality of the air outlet holes.

[0010] As a further preference, the sealing section is annular, and the outer peripheral wall of the sealing section is inclined from top to bottom toward the axial direction close to the sealing section.

[0011] As a further preference, it further includes a supporting section, which is sleeved on the outer edge of the valve core, and the supporting section is located at the lower side of the sealing section, and the upper surface of the supporting section is against the lower surface of the sealing section.

[0012] As a further preference, the connecting section and the sealing section are both made of elastic material.

[0013] As a further preference, the outer edge of the upper surface of the support segment is provided with a rounded chamfer structure.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] A static sealing assembly is used to seal the valve core and the valve seat in the air pressure regulating valve of the present invention, and one end of the static sealing assembly is fixedly connected to the valve seat, and the other end is connected to the valve core. During the up and down movement of the valve core, the other end of the static sealing assembly can move with the valve core and remain stationary relative to the valve core, which can prevent wear and tear and ensure the airtightness between the valve core and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the air pressure regulating valve in the present invention;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0018] In the figure: 1. valve body; 2. valve cap; 3. valve seat; 4. valve core; 5. second through hole; 6. static sealing assembly; 601. fixed section; 602. connecting section; 603. sealing section; 604. supporting section; 7. air inlet; 8. air outlet; 9. air flow channel; 10. groove; 11. buffer hole; 12. throttle hole; 13. first sealing member; 14. second sealing member; 15. first spring; 16. second spring; 17. mounting seat; 18. base. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Figure 1 It is a schematic diagram of the internal structure of the air pressure regulating valve in the present invention; Figure 2 yes Figure 1 For the enlarged view of point A in the middle, please see Figure 1 to Figure 2 As shown, a preferred embodiment is shown, which is an air pressure regulating valve, including a valve body 1 and a valve bonnet 2 arranged at the upper end of the valve body 1, a valve seat 3 and a valve core 4 are arranged inside the valve body 1, a first through hole is arranged in the middle of the valve seat 3, a second through hole 5 is arranged in the middle of the valve bonnet 2, one end of the valve core 4 passes through the first through hole and extends into the second through hole 5, and also includes a static sealing component 6 arranged inside the valve body 1, one end of the static sealing component 6 is connected to the inner peripheral wall of the valve seat 3, and the other end of the static sealing component 6 is sleeved on the outer peripheral wall of the valve core 4, wherein a plurality of air inlet holes 7 and a plurality of air outlet holes 8 are opened on the outer wall of the valve core 4, the plurality of air inlet holes 7 are arranged in an annular array, and the plurality of air outlet holes 8 are arranged in an annular array, and a plurality of air flow channels 9 are arranged inside the valve core 4, one end of each air flow channel 9 is connected to the air inlet hole 7, and the other end is connected to the air outlet hole 8, and the plurality of air outlet holes 8 are directly opposite to the other end of the static sealing component 6. In this embodiment, as Figure 1As shown, the valve bonnet 2 is arranged on the top of the valve body 1, so that a first cavity is formed between the valve bonnet 2, the valve body 1 and the valve seat 3, and a second cavity is formed between the bottom of the valve seat 3 and the valve body 1. There is a gap between the inner wall of the first through hole and the outer wall of the valve core 4 for exhaust. The second through hole 5 and the valve core 4 are sealed to prevent gas leakage and affect the air tightness. A first sealing member 13 is provided between the outer peripheral wall of the valve seat 3 and the inner peripheral wall of the valve body 1, and a second sealing member 14 is provided between the inner peripheral wall of the valve bonnet 2 and the outer edge of the upper end of the valve body 1. The first sealing member 13 and the second sealing member 14 are both used for gas sealing. The static sealing assembly 6 is used to connect the valve core 4 and the valve seat 3, and is used for the communication of gas between the first cavity and the second cavity. The valve core 4 can move up and down relative to the valve seat 3. When the valve core 4 moves upward, the connection between the static sealing component 6 and the valve core 4 will automatically tilt outward, so that the air outlet 8 is connected to the first cavity. At this time, the gas in the second cavity enters the bottom side of the static sealing component 6, and enters the air flow channel 9 through the air inlet 7, then enters the first cavity through the air outlet 8, and finally is discharged from the first through hole. When the valve core 4 moves downward, the connection between the static sealing component 6 and the valve core 4 automatically covers the air outlet 8 under the action of its own elasticity, so that the air outlet 8 is sealed.

[0023] Further, as a preferred embodiment, a groove 10 and a first through hole are sequentially opened in the middle of the valve seat 3 from top to bottom, the groove 10 is connected to the first through hole, and the static sealing component 6 is arranged in the groove 10. In this embodiment, Figure 1 As shown, a buffer hole 11 and a throttle hole 12 are sequentially provided at the bottom of the groove 10 from top to bottom, and the throttle hole 12 is connected with the buffer hole 11. The gas in the second cavity enters the buffer hole 11 through the throttle hole 12, and forms a stable airflow under the action of the buffer hole 11, and enters the bottom of the static sealing component 6 and the groove 10. The throttle hole 12 and the buffer hole 11 are provided to stabilize the airflow, and can stabilize the air pressure between the static sealing component 6 and the bottom of the groove 10, and prevent the static sealing component 6 from being damaged by excessive pressure drop. The air outlet 8 in this embodiment is located on the upper side of the air inlet 7, and under normal conditions, the air inlet 7 and the air outlet 8 are both located in the groove 10.

[0024] Furthermore, as a preferred embodiment, it also includes a first sealing member 13 , and the first sealing member 13 is provided between the outer edge of the valve seat 3 and the inner peripheral wall of the valve body 1 .

[0025] Further, as a preferred embodiment, the static sealing assembly 6 includes a fixed section 601, a connecting section 602 and a sealing section 603, wherein the fixed section 601 is injection molded in the side wall of the groove 10, one end of the connecting section 602 is connected to the fixed section 601, and the other end of the connecting section 602 is connected to the outer side wall of the sealing section 603, the sealing section 603 is sleeved on the outer edge of the valve core 4, and the inner peripheral wall of the sealing section 603 seals a plurality of air outlets 8. In this embodiment, as Figure 2 As shown, the fixed section 601 is fixed in the valve seat 3, the connecting section 602 is made of a flexible material, such as a flexible membrane, which is convenient for expansion and contraction, and the sealing section 603 is made of an elastic material. Under normal circumstances, the sealing section 603 is tightly fitted on the outer edge of the valve core 4 to seal the air outlet 8. When the valve core 4 moves upward, the valve core 4 drives the sealing section 603 to move upward, and the connecting section 602 will tighten the sealing section 603, so that the sealing section 603 tilts away from the valve core 4, thereby exposing the air outlet 8, which is convenient for the circulation of gas and realizes the exhaust and pressure relief function. When the valve core 4 moves downward, the sealing section 603 automatically covers the surface of the air outlet 8 under the action of its own elasticity. The elastic strength of the connecting section 602 and the sealing section 603 in this embodiment can be selected as needed. In this embodiment, Figure 1 As shown, in a normal state, the connecting section 602 is arranged to be tilted downward. When the valve core 4 moves up and down, the sealing section 603 will not slide relative to the valve core 4, thereby avoiding the wear of the sealing section 603 and increasing the service life of the sealing section 603.

[0026] Further, as a preferred embodiment, the sealing section 603 is annular, and the outer peripheral wall of the sealing section 603 is inclined from top to bottom toward the axial direction close to the sealing section 603. Figure 2 As shown, the sealing section 603 is configured to be wide at the top and narrow at the bottom. When the connecting section 602 tilts downward to pull the sealing section 603, the sealing section 603 is easily tilted, so that the air outlet 8 is exposed.

[0027] Further, as a preferred embodiment, it further includes a support section 604, which is sleeved on the outer edge of the valve core 4 and is located at the lower side of the sealing section 603, and the upper surface of the support section 604 abuts against the lower surface of the sealing section 603. Figure 2 As shown, the support segment 604 is used to fix the sealing segment 603, which can prevent the sealing segment 603 from sliding relative to the valve core 4, and the diameter of the support segment 604 is much larger than the diameter of the sealing segment 603 after expansion, that is, after the valve core 4 moves upward to the extreme position, the diameter of the sealing segment 603 after expansion is smaller than the diameter of the support segment 604, preventing the sealing segment 603 from detaching from the support segment 604.

[0028] Furthermore, as a preferred implementation, the connecting section 602 and the sealing section 603 are both made of elastic materials.

[0029] Further, as a preferred embodiment, a rounded chamfer structure is provided on the outer edge of the upper surface of the support section 604. In this embodiment, the rounded chamfer structure provided can prevent the connection section 602 from being worn.

[0030] The above description is only a preferred embodiment of the present application and does not limit the implementation method and protection scope of the present application.

[0031] Based on the above preferred embodiments, the present application also has the following preferred implementation modes:

[0032] Further, as a preferred embodiment, the outer edge of the valve core 4 is further provided with a first spring 15 and a second spring 16, wherein the first spring 15 is located inside the second spring 16, and the first spring 15 is used to provide a reset capability for the valve core 4, and the upper end of the first spring 15 abuts against the bottom of the valve seat 3, and the lower end of the first spring 15 abuts against the mounting seat 17 on the valve core 4. One end of the second spring 16 abuts against the bottom of the valve seat 3, and the other end abuts against the base 18 on the bottom inner wall of the valve body 1, and the second spring 16 is used to support the valve seat 3. In this embodiment, Figure 1 As shown, the first spring 15 is used to provide a reset capability for the valve core 4, and the second spring 16 is used to provide a reset capability for the valve seat 3. The first spring 15 acts between the valve core 4 and the valve seat 3, and the second spring 16 acts between the valve seat 3 and the valve body 1, wherein the force direction of the first spring 15 is opposite to the movement direction of the valve core 4, and the force direction of the second spring 16 is opposite to the movement direction of the valve seat 3. When the valve core 4 moves upward, it needs to overcome the force of the first spring 15. After the air release is completed, the valve core 4 automatically resets under the action of the first spring. When the valve core 4 drives the valve seat 3 to move downward, the valve seat 3 needs to overcome the force of the second spring 16. After the air intake is completed, the force of the second spring 16 drives the valve seat 3 to move upward, so that the upper end of the valve seat 3 is against the step surface of the inner wall of the valve body 1 to achieve sealing. The valve seat 3 in this embodiment can slide up and down in the valve body 1. As shown Figure 1 As shown, the inner wall of the valve body 1 has a flange, and the bottom wall of the flange is a step surface, and the step surface is located on the upper side of the valve seat 3.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas pressure regulating valve, comprising a valve body and a valve cap arranged at the upper end of the valve body, wherein a valve seat and a valve core are arranged inside the valve body, a first through hole is arranged in the middle of the valve seat, a second through hole is arranged in the middle of the valve cap, one end of the valve core passes through the first through hole and extends into the second through hole, characterized in that: It also includes a static sealing component and a first sealing member arranged inside the valve body, the first sealing member is arranged between the outer edge of the valve seat and the inner peripheral wall of the valve body, one end of the static sealing component is connected to the inner peripheral wall of the valve seat, and the other end of the static sealing component is sleeved on the outer peripheral wall of the valve core, wherein a plurality of air inlet holes and a plurality of air outlet holes are opened on the outer wall of the valve core, a plurality of the air inlet holes are in an annular array, and a plurality of the air outlet holes are in an annular array, a plurality of air flow channels are arranged inside the valve core, one end of each of the air flow channels is connected to the air inlet hole, and the other end is connected to the air outlet hole. Hole, several of the air outlet holes are directly opposite to the other end of the static sealing assembly, a groove and the first through hole are sequentially opened in the middle of the valve seat from top to bottom, the groove is communicated with the first through hole, the static sealing assembly is arranged in the groove, the static sealing assembly includes a fixed section, a connecting section and a sealing section, wherein the fixed section is injection molded in the side wall of the groove, one end of the connecting section is connected to the fixed section, the other end of the connecting section is connected to the outer side wall of the sealing section, the sealing section is sleeved on the outer edge of the valve core, and the inner peripheral wall of the sealing section seals several of the air outlet holes.

2. The air pressure regulating valve according to claim 1, characterized in that: The sealing section is annular, and the outer peripheral wall of the sealing section is inclined from top to bottom toward the axial direction of the sealing section.

3. The gas pressure regulating valve according to claim 1, characterized in that: It also includes a support section, which is sleeved on the outer edge of the valve core and located at the lower side of the sealing section, and the upper surface of the support section is against the lower surface of the sealing section.

4. The gas pressure regulating valve according to claim 1, characterized in that: The connecting section and the sealing section are both made of elastic material.

5. The gas pressure regulating valve according to claim 3, characterized in that: The outer edge of the upper surface of the support section is provided with a rounded chamfer structure.

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