CN217598544U - Pressure increasing valve - Google Patents

Abstract

The utility model provides a pressure-increasing valve, include: the valve body is provided with a valve cavity, a first air inlet, a second air inlet and an air outlet, wherein the first air inlet, the second air inlet and the air outlet are communicated with the valve cavity; the piston movably penetrates through the valve cavity, the piston is attached to the valve cavity, the valve cavity is divided into a driving cavity and an inflation cavity by the piston, the first air inlet is communicated with the driving cavity, the air outlet is communicated with the inflation cavity, the piston is provided with a plugging position and an opening position, the piston plugs the second air inlet when the piston is located at the plugging position, and the second air inlet is communicated with the inflation cavity when the piston is located at the opening position; the first limiting block is arranged on the wall of the valve cavity, the second limiting block is arranged on the outer side wall of the piston, and the first limiting block is abutted to the second limiting block when the piston is located at the opening position. Through the technical scheme provided by the application, the problem that the braking force is not increased during emergency braking of the railway wagon in the related technology can be solved.

Description

Pressure increasing valve

Technical Field

The utility model relates to a railway freight car technical field particularly, relates to a pressure-increasing valve.

Background

The air control valve, the auxiliary reservoir and the brake cylinder are core control parts of the train, and have functions of controlling a vehicle brake system to generate braking, relieving and the like. Meanwhile, when the train has an unexpected dangerous condition, the emergency brake needs to be started for stopping.

In the related art, the air control valve includes a main valve and an emergency valve. When the train is braked, the pressure air in the train pipe is exhausted through the main valve, the auxiliary air cylinder is enabled to inflate the brake cylinder, and the lever is driven through the brake cylinder, so that the train is braked. When the train is emergently braked, the emergency valve quickly exhausts pressure air in a train pipe, so that the emergency brake reaction speed is increased, the train can quickly obtain larger brake force under the emergency brake working condition, the auxiliary air cylinder inflates the brake cylinder, and the lever is driven by the brake cylinder, so that the train is braked. When the train is relieved, the main valve and the emergency valve are inflated through the train pipe, and meanwhile, air in the brake cylinder is exhausted to the atmosphere, so that the relieving of the train is realized.

During emergency braking, when pressure air is quickly exhausted only through the emergency valve, quick braking under an emergency working condition is further achieved, however, compared with normal braking, the auxiliary air cylinder is still used for inflating the brake cylinder, the brake cylinder drives the lever, braking of a train is achieved, and braking force of the train is not increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pressure increasing valve to the problem that braking force does not have the increase when solving the railway freight car emergency braking among the correlation technique.

The utility model provides a pressure-increasing valve, pressure-increasing valve includes: the valve body is provided with a valve cavity, a first air inlet, a second air inlet and an air outlet, wherein the first air inlet, the second air inlet and the air outlet are communicated with the valve cavity; the piston movably penetrates through the valve cavity, the outer side wall of the piston is attached to the inner side wall of the valve cavity, the piston divides the valve cavity into a driving cavity and an inflation cavity, the first air inlet is communicated with the driving cavity, the air outlet is communicated with the inflation cavity, the piston is provided with a plugging position and an opening position, when the piston is located at the plugging position, the piston plugs the second air inlet, and when the piston is located at the opening position, the second air inlet is communicated with the inflation cavity; the first limiting block is arranged on the wall of the valve cavity, the second limiting block is arranged on the outer side wall of the piston, and the first limiting block is abutted to the second limiting block when the piston is located at the opening position.

Further, the piston is provided with a communication hole, a first end of the communication hole is communicated with the inflation cavity, a second end of the communication hole penetrates through the outer side wall of the piston, and when the piston is located at the opening position, the second air inlet is communicated with the second end of the communication hole.

Further, the piston is including the guide section and the spacing section that are connected, and the lateral wall of guide section and the inboard wall of valve pocket are laminated mutually, and the second stopper sets up in spacing section, and the first end of intercommunicating pore runs through the end wall of spacing section and is linked together with aerifing the chamber, and the second end of intercommunicating pore runs through the lateral wall of guide section.

Further, the valve body includes the valve body and sets up the uide bushing in the valve body, and the uide bushing has the air vent that runs through the setting, and the uide bushing is worn to locate by the piston is movably, and when the piston was located open position, the second air inlet was linked together through the second end of air vent and intercommunicating pore.

Furthermore, one end of the guide sleeve facing the air outlet is provided with an annular flanging, and the annular flanging is attached to one end of the first limiting block.

Furthermore, the booster valve also comprises a sealing assembly, the sealing assembly comprises a first sealing ring and a second sealing ring which are arranged at intervals along the length direction of the piston, the first sealing ring and the second sealing ring are sleeved on the outer side wall of the piston, and when the piston is located at the blocking position, the first sealing ring and the second sealing ring are respectively located on two sides of the vent hole.

Further, the sealing assembly further comprises a third sealing ring, the outer side wall of the piston is sleeved with the third sealing ring, and the third sealing ring is located at one end, close to the air outlet, of the guide sleeve.

Furthermore, the first limiting block is a first annular boss arranged on the cavity wall of the valve cavity, and the second limiting block is a second annular boss arranged on the outer side wall of the piston.

Further, the valve body comprises a buffer groove, the buffer groove penetrates through the inner side wall of the first annular boss, one end of the buffer groove is communicated with the communication hole, and the other end of the buffer groove is communicated with the second air inlet; and/or the second limiting block is arranged at one end of the piston, which faces the air outlet.

Furthermore, the pressure increasing valve also comprises a compression spring, one end of the compression spring is abutted with the piston, and the other end of the compression spring is abutted with the cavity wall of the valve cavity; the valve body comprises a valve body and a valve cover which are connected, the valve cover is arranged at one end of the valve body close to the air outlet, and the valve body is provided with a valve cavity; the booster valve still includes the fourth sealing washer, and the valve body is provided with the annular groove towards the one end of valve gap, and the fourth sealing washer sets up in the annular groove, the both sides of fourth sealing washer respectively with annular groove and valve gap looks butt.

Use the technical scheme of the utility model, the booster valve includes valve body and piston, is linked together the first air inlet of booster valve and train pipe, with the gas outlet of booster valve with alleviate the reservoir intercommunication with higher speed, with the second air inlet and the checking cylinder intercommunication of booster valve. When the train is emergently braked, the train pipe is emptied through the emergency valve, the driving cavity exhausts through the first air inlet communicated with the driving cavity, so that the pressure at the second air inlet of the valve cavity communicated with the brake cylinder is greater than the pressure at the first air inlet of the valve cavity, the piston moves towards the first air inlet of the valve cavity along the axis of the valve cavity, the piston is located at one end, close to the first air inlet, of the valve cavity, and the piston is located at the opening position, communicated with the inflation cavity, of the air outlet. At the moment, the brake cylinder is communicated with the accelerated release air cylinder, so that the pressure air in the accelerated release air cylinder can be filled into the brake cylinder, and the air pressure in the brake cylinder is increased compared with that in normal parking, so that the braking force of the train is increased. And because the cavity wall of the valve cavity is provided with the first limiting block, the outer side wall of the piston is provided with the second limiting block, and the second limiting block can be limited by the first limiting block, so that the piston is stably positioned at the opening position.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

fig. 1 is a schematic structural view of a booster valve provided by an embodiment of the present invention when a piston is in a blocking position;

fig. 2 shows a schematic structural diagram of a pressure increasing valve provided by the embodiment of the invention when the piston is located at an open position.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a valve cavity; 111. a drive chamber; 112. an inflation cavity; 113. a first stopper; 114. a first annular boss; 12. a first air inlet; 13. a second air inlet; 14. an air outlet; 15. a valve body; 16. a guide sleeve; 161. a vent hole; 162. annular flanging; 17. a buffer tank; 18. a valve cover; 19. an annular groove;

20. a piston; 21. a second limiting block; 22. a communicating hole; 221. an air intake section; 222. an air outlet section; 2221. a small diameter section; 2222. a large diameter section; 23. a guide section; 231. a groove; 24. a limiting section; 25. a second annular boss; 26. shrinking and plugging;

30. a seal assembly; 31. a first seal ring; 32. a second seal ring; 33. a third seal ring;

40. a compression spring;

50. and a fourth seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a pressure increasing valve, the pressure increasing valve includes a valve body 10 and a piston 20, the valve body 10 has a valve cavity 11 and a first air inlet 12 communicated with the valve cavity 11, a second air inlet 13 and an air outlet 14, the second air inlet 13 is located between the first air inlet 12 and the air outlet 14, the piston 20 is movably disposed in the valve cavity 11 in a penetrating manner, an outer side wall of the piston 20 is attached to an inner side wall of the valve cavity 11, the piston 20 separates the valve cavity 11 into a driving cavity 111 and an inflation cavity 112, the first air inlet 12 is communicated with the driving cavity 111, the air outlet 14 is communicated with the inflation cavity 112, the piston 20 has a blocking position and an opening position, when the piston 20 is located at the blocking position, the piston 20 blocks the second air inlet 13, when the piston 20 is located at the opening position, the second air inlet 13 is communicated with the inflation cavity 112, wherein a wall of the valve cavity 11 is provided with a first limiting block 113, an outer side wall of the piston 20 is provided with a second limiting block 21, and when the piston 20 is located at the opening position, the first limiting block 113 is abutted against the second limiting block 21.

Use the technical scheme of the utility model, the booster valve includes valve body 10 and piston 20, is linked together the first air inlet 12 and the train pipe of booster valve, with the gas outlet 14 of booster valve with alleviate the reservoir intercommunication with higher speed, with the second air inlet 13 and the checking cylinder intercommunication of booster valve. When the train is braked emergently, the train pipe is emptied through the emergency valve, the driving cavity 111 is exhausted through the first air inlet 12 communicated with the driving cavity 111, so that the pressure at the second air inlet 13 of the valve cavity 11 communicated with the brake cylinder is greater than the pressure at the first air inlet 12 of the valve cavity 11, the piston 20 is further moved towards the first air inlet 12 of the valve cavity 11 along the axis of the valve cavity 11, the piston 20 is located at one end of the valve cavity 11 close to the first air inlet 12, and the piston 20 is located at the opening position where the air outlet 14 is communicated with the inflation cavity 112. At the moment, the brake cylinder is communicated with the accelerated release reservoir, so that the pressure air in the accelerated release reservoir can be filled into the brake cylinder. And because the first limiting block 113 is arranged on the cavity wall of the valve cavity 11, the second limiting block 21 is arranged on the outer side wall of the piston 20, and the second limiting block 21 can be limited by the first limiting block 113, so that the piston 20 is stably located at the opening position.

In this embodiment, the first air inlet 12 is communicated with the train pipe through the valve cavity of the emergency valve, so that only when the train pipe is exhausted through the valve cavity of the emergency valve under the emergency braking condition, the accelerated release of the reservoir for charging the brake cylinder can be realized through the pressure increasing valve.

It should be noted that, in the relieving condition after emergency braking, since the accelerated relieving reservoir and the train pipe are kept in a communicated state in the train pipe inflation stage, and the accelerated relieving reservoir and the train pipe are kept in a sealed state when the train pipe is exhausted, the air pressure of the accelerated relieving reservoir is equal to the pressure of the train pipe after inflation, which is about 500KP, and the pressure is greater than the air pressure in the brake cylinder, and further, when the train is subjected to emergency braking, since the brake cylinder and the accelerated relieving reservoir are communicated, the effect of accelerating the relieving reservoir to inflate the brake cylinder can be realized, and compared with the brake cylinder only receiving the air pressure stored in the auxiliary reservoir during normal parking braking, during emergency braking of the train, the accelerated relieving reservoir and the brake cylinder are communicated, so that the source of the air pressure received by the brake cylinder is increased besides the auxiliary reservoir, and the accelerated relieving reservoir is also added, and the problem that the braking force of the emergency braking is not increased compared with the normal parking is solved.

Wherein the pressure increasing valve further comprises a compression spring 40, and when the train is braked emergently, the compression spring 40 is in a compressed state because the piston 20 moves towards the first air inlet 12 of the valve cavity 11 along the axis of the valve cavity 11. When the train is in a relieving working condition, the train pipe is completely inflated and the maximum pressure is kept, because the outer side wall of the piston 20 is attached to the inner side wall of the valve cavity 11, the piston 20 divides the valve cavity 11 into a driving cavity 111 and an inflating cavity 112, the first air inlet 12 is communicated with the driving cavity 111, at the moment, the resultant force of the pressures of the compression spring 40 and the driving cavity 111 is greater than the pressure of the inflating cavity 112, the piston 20 moves towards the inflating cavity 112 along the axis of the valve cavity 11, finally the piston 20 moves to a blocking position, the piston 20 blocks the second air inlet 13, the second air inlet 13 is disconnected with the inflating cavity 112, the brake cylinder is not communicated with the accelerated relieving air cylinder, and the brake cylinder is in a pressure maintaining state.

It should be noted that the first air inlet 12 only needs to ensure that two ends thereof are respectively communicated with the train pipe and the driving cavity 111, the second air inlet 13 only needs to ensure that two ends thereof are respectively communicated with the brake cylinder and the inflation cavity 112, and the specific positions of the first air inlet 12 and the second air inlet 13 at two ends of the piston 20 can be adjusted according to actual requirements.

As shown in fig. 2, the piston 20 has a communication hole 22, a first end of the communication hole 22 communicates with the charge chamber 112, a second end of the communication hole 22 penetrates through an outer side wall of the piston 20, and the second intake port 13 communicates with the second end of the communication hole 22 when the piston 20 is in the open position. By adopting the communication hole 22, when the train is braked emergently, the second air inlet 13 can be communicated with the inflation cavity 112, so that the communication between the brake cylinder and the accelerated release reservoir is realized.

Specifically, the communication hole 22 includes an air inlet section 221 and an air outlet section 222 which are communicated with each other, the air outlet section 222 extends along the length direction of the piston 20 and is communicated with the air outlet 14 of the valve chamber 11, and the air inlet section 221 extends along the radial direction of the piston 20 and penetrates through the side wall of the piston 20. The communicating hole 22 having the above-described structure has an advantage of facilitating the processing.

The air outlet section 222 includes a small diameter section 2221 and a large diameter section 2222 which are communicated with each other, the small diameter section 2221 is communicated with the air inlet section 221, the large diameter section 2222 is communicated with the air outlet 14, and the aperture of the small diameter section 2221 is smaller than that of the large diameter section 2222. By adopting the air outlet section 222 with the structure, when the train is emergently braked, the effect that air pressure is reduced after air flows from the small-diameter section 2221 to the large-diameter section 2222 can be realized through the pressure relief effect of the large-diameter section 2222, so that the speed of inflating the brake cylinder is reduced, the phenomenon that the running speeds of all trains are different during the emergency braking is avoided, the collision between carriages is avoided, the safety during the emergency braking of the train is improved, and the consistency of the train is improved.

In the present embodiment, the piston 20 further includes a plug 26 penetrating the small-diameter section 2221, and the plug 26 has a central hole extending in the same direction as the small-diameter section 2221. By adopting the reducing plug 26, when the train is emergently braked, the effect of reducing the air flow from the small-diameter section 2221 to the large-diameter section 2222 is realized by utilizing the structure that the hole diameter of the central hole of the reducing plug 26 is small, so that the air inflation speed of the brake cylinder is reduced, the phenomenon that the running speeds of all carriages are different during the emergency braking is avoided, the collision among the carriages is avoided, and the safety of the train during the emergency braking is improved.

As shown in fig. 2, the piston 20 includes a guide section 23 and a limiting section 24 connected to each other, an outer side wall of the guide section 23 is attached to an inner side wall of the valve chamber 11, the second limiting block 21 is disposed on the limiting section 24, a first end of the communication hole 22 penetrates through an end wall of the limiting section 24 and is communicated with the inflation chamber 112, and a second end of the communication hole 22 penetrates through an outer side wall of the guide section 23. The piston 20 with the structure has the advantage of convenient processing.

The guide section 23 can guide the movement of the piston 20, so that the piston 20 moves along the axis of the valve chamber 11.

In the present embodiment, the guide section 23 of the piston 20 is provided with a groove 231, the groove 231 is an annular structure extending along the circumferential direction of the piston 20, and the second air inlet 13 is communicated with the communication hole 22 through the groove 231. With the guide section 23 having the above structure, not only can the groove 231 be used for communicating the second air inlet 13 with the communicating hole 22, but also the contact area between the guide section 23 and the cavity wall of the valve cavity 11 can be reduced.

As shown in fig. 2, the valve body 10 includes a valve body 15 and a guide sleeve 16 disposed in the valve body 15, the guide sleeve 16 has a vent hole 161 penetrating therethrough, the piston 20 is movably disposed through the guide sleeve 16, and when the piston 20 is in the open position, the second air inlet 13 communicates with the second end of the communication hole 22 through the vent hole 161. With the valve body 10 of the above structure, the piston 20 can be guided by the cooperation of the guide sleeve 16 and the guide section 23, so that the piston 20 moves along the axis of the valve cavity 11.

As shown in fig. 2, an annular flange 162 is disposed at an end of the guide sleeve 16 facing the air outlet 14, and the annular flange 162 is attached to an end of the first stopper 113. By adopting the guide sleeve 16 with the structure, the annular flanging 162 can be utilized to position the guide sleeve 16, and the guide sleeve has the advantages of simple structure and convenience in processing.

As shown in fig. 1, the booster valve further includes a sealing assembly 30, the sealing assembly 30 includes a first sealing ring 31 and a second sealing ring 32 that are disposed at intervals along the length direction of the piston 20, the first sealing ring 31 and the second sealing ring 32 are both sleeved on the outer side wall of the piston 20, and when the piston 20 is located at the blocking position, the first sealing ring 31 and the second sealing ring 32 are respectively located at two sides of the vent hole 161. With the seal assembly 30, the first air inlet 12 can be isolated from the air outlet 14, and the second air inlet 13 can be isolated from the air outlet 14, so that airtightness between the driving chamber 111, the communication hole 22, and the inflating chamber 112 can be enhanced.

As shown in fig. 2, the sealing assembly 30 further includes a third sealing ring 33, the third sealing ring 33 is disposed on the outer side wall of the piston 20, and the third sealing ring 33 is located at an end of the guide sleeve 16 close to the air outlet 14. When the train is emergently braked, the piston 20 is located at the opening position, and the third sealing ring 33 is utilized, so that the gas entering the groove 231 can only enter the inflation cavity 112 through the gas outlet section 222, and further the impact of high-pressure gas on the limiting section 24 is avoided, and the piston 20 cannot move.

As shown in fig. 2, the first stopper 113 is a first annular boss 114 provided on the cavity wall of the valve cavity 11, and the second stopper 21 is a second annular boss 25 provided on the outer side wall of the piston 20. By adopting the first limiting block 113 and the second limiting block 21 with the above structure, the contact area between the first limiting block 113 and the guide sleeve 16 and the contact area between the first limiting block 113 and the second limiting block 21 can be increased, so that the pressure applied to the first limiting block 113, the second limiting block 21 and the guide sleeve 16 can be reduced, and the service life of the pressure increasing valve can be prolonged.

As shown in fig. 2, the valve body 10 includes a buffer groove 17, the buffer groove 17 penetrates through the inner sidewall of the first annular boss 114, one end of the buffer groove 17 communicates with the communication hole 22, and the other end of the buffer groove 17 communicates with the second air inlet 13. Adopt the buffer tank 17 can form from the gas of accelerateing to alleviate the reservoir entering and hold and cushion, avoid high-pressure gas direct impact uide bushing 16, and then protect uide bushing 16.

In this embodiment, the second stopper 21 is disposed at one end of the piston 20 facing the air outlet 14. The second limiting block 21 with the structure has the advantage of being convenient to process.

As shown in fig. 1 and 2, the pressure increasing valve further includes a compression spring 40, one end of the compression spring 40 abuts against the piston 20, and the other end of the compression spring 40 abuts against the chamber wall of the valve chamber 11. When the train is in a non-emergency braking working condition, the combined action of the pressure in the driving cavity 111 and the compression spring 40 is greater than the acting force of the inflation cavity 112 on the piston 20, the piston 20 is located at the blocking position, the acceleration relief air cylinder is not communicated with an inflation channel of the brake cylinder, and the pressurization function of the pressurization valve is not started.

It should be noted that, during emergency braking of the train, the pressure in the train pipe is completely exhausted to the atmosphere, the inflation cavity 112 pushes the piston 20 to move to press the compression spring 40, the acceleration relief air cylinder is communicated to the brake cylinder inflation passage, the pressure increasing valve starts the pressure increasing function, and the compression spring 40 is in a compressed state.

In this embodiment, the valve body 10 includes a valve body 15 and a valve cover 18 connected to each other, the valve cover 18 is disposed at an end of the valve body 15 close to the air outlet 14, and the valve body 15 has a valve chamber 11. The valve body 10 with the structure has the advantages of being convenient to process and install.

It should be noted that the pressure increasing valve further includes a fourth sealing ring 50, an annular groove 19 is disposed at one end of the valve body 10 facing the valve cover 18, the fourth sealing ring 50 is disposed in the annular groove 19, and two sides of the fourth sealing ring 50 are respectively abutted to the annular groove 19 and the valve cover 18. By adopting the fourth sealing ring 50, the sealing performance between the valve body 15 and the valve cover 18, namely the air tightness between the valve cavity 11 and the outside atmosphere, can be enhanced, so that the air tightness of the booster valve is improved.

Use the utility model provides a pressure-increasing valve has following beneficial effect:

(1) The communicating hole 22 comprises an air inlet section 221 and an air outlet section 222 which are communicated with each other, the piston 20 comprises a guide section 23 and a limiting section 24 which are connected with each other, one end of the guide sleeve 16 facing the air outlet 14 is provided with an annular flange 162, the second limiting block 21 is arranged at one end of the piston 20 facing the air outlet 14, and the valve body 10 comprises a valve body 15 and a valve cover 18 which are connected with each other;

(2) The sealing assembly 30 comprises a first sealing ring 31 and a second sealing ring 32 which are arranged along the length direction of the piston 20 at intervals, the first sealing ring 31 and the second sealing ring 32 are all sleeved on the outer side wall of the piston 20, the sealing assembly 30 further comprises a third sealing ring 33, the outer side wall of the piston 20 is sleeved with the third sealing ring 33, the booster valve further comprises a fourth sealing ring 50, an annular groove 19 is formed in one end, facing the valve cover 18, of the valve body 10, the fourth sealing ring 50 is arranged in the annular groove 19, and by means of the sealing rings, the air tightness of the booster valve can be enhanced.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A booster valve characterized in that it comprises:

the valve body (10) is provided with a valve cavity (11), and a first air inlet (12), a second air inlet (13) and an air outlet (14) which are communicated with the valve cavity (11), wherein the second air inlet (13) is positioned between the first air inlet (12) and the air outlet (14);

the piston (20) is movably arranged in the valve cavity (11) in a penetrating mode, the outer side wall of the piston (20) is attached to the inner side wall of the valve cavity (11), the piston (20) divides the valve cavity (11) into a driving cavity (111) and an inflating cavity (112), the first air inlet (12) is communicated with the driving cavity (111), the air outlet (14) is communicated with the inflating cavity (112), the piston (20) is provided with a blocking position and an opening position, when the piston (20) is located at the blocking position, the second air inlet (13) is blocked by the piston (20), and when the piston (20) is located at the opening position, the second air inlet (13) is communicated with the inflating cavity (112);

the valve comprises a valve cavity (11), a first limiting block (113) is arranged on the cavity wall of the valve cavity (11), a second limiting block (21) is arranged on the outer side wall of a piston (20), and the first limiting block (113) is abutted against the second limiting block (21) when the piston (20) is located at the opening position.

2. The booster valve according to claim 1, wherein the piston (20) has a communication hole (22), a first end of the communication hole (22) communicating with the charge chamber (112), a second end of the communication hole (22) penetrating an outer side wall of the piston (20), and the second air inlet port (13) communicating with the second end of the communication hole (22) when the piston (20) is in the open position.

3. The booster valve according to claim 2, wherein the piston (20) comprises a guide section (23) and a limiting section (24) which are connected with each other, the outer side wall of the guide section (23) is attached to the inner side wall of the valve chamber (11), the second limiting block (21) is arranged on the limiting section (24), the first end of the communication hole (22) penetrates through the end wall of the limiting section (24) and is communicated with the inflation chamber (112), and the second end of the communication hole (22) penetrates through the outer side wall of the guide section (23).

4. The booster valve according to claim 2, characterized in that the valve body (10) comprises a valve body (15) and a guide sleeve (16) disposed in the valve body (15), the guide sleeve (16) having a vent hole (161) disposed therethrough, the piston (20) being movably disposed through the guide sleeve (16), the second air inlet (13) communicating with the second end of the communication hole (22) through the vent hole (161) when the piston (20) is in the open position.

5. The booster valve according to claim 4, characterized in that an annular flange (162) is arranged at one end of the guide sleeve (16) facing the air outlet (14), and the annular flange (162) is attached to one end of the first stopper (113).

6. The booster valve according to claim 4, characterized in that the booster valve further comprises a sealing assembly (30), the sealing assembly (30) comprises a first sealing ring (31) and a second sealing ring (32) which are arranged at intervals along the length direction of the piston (20), the first sealing ring (31) and the second sealing ring (32) are both sleeved on the outer side wall of the piston (20), and when the piston (20) is located at the blocking position, the first sealing ring (31) and the second sealing ring (32) are respectively located at two sides of the vent hole (161).

7. The booster valve of claim 6, wherein the sealing assembly (30) further comprises a third sealing ring (33), the third sealing ring (33) is sleeved on the outer side wall of the piston (20), and the third sealing ring (33) is positioned at one end of the guide sleeve (16) close to the air outlet (14).

8. The booster valve according to claim 2, characterized in that the first stopper (113) is a first annular boss (114) provided on the chamber wall of the valve chamber (11) and the second stopper (21) is a second annular boss (25) provided on the outer side wall of the piston (20).

9. The booster valve of claim 8,

the valve body (10) comprises a buffer groove (17), the buffer groove (17) penetrates through the inner side wall of the first annular boss (114), one end of the buffer groove (17) is communicated with the communicating hole (22), and the other end of the buffer groove (17) is communicated with the second air inlet (13); and/or the presence of a gas in the atmosphere,

the second limiting block (21) is arranged at one end, facing the air outlet (14), of the piston (20).

10. The booster valve of claim 1,

the pressure increasing valve further comprises a compression spring (40), one end of the compression spring (40) is abutted with the piston (20), and the other end of the compression spring (40) is abutted with the cavity wall of the valve cavity (11);

the valve body (10) comprises a valve body (15) and a valve cover (18) which are connected, the valve cover (18) is arranged at one end, close to the air outlet (14), of the valve body (15) in a covering mode, and the valve body (15) is provided with the valve cavity (11);

the booster valve further comprises a fourth sealing ring (50), one end of the valve body (10) facing the valve cover (18) is provided with an annular groove (19), the fourth sealing ring (50) is arranged in the annular groove (19), and two sides of the fourth sealing ring (50) are respectively abutted to the annular groove (19) and the valve cover (18).

Images