CN217502708U - Emptying valve - Google Patents

Abstract

The present disclosure relates to a blow-down valve. The emptying valve comprises a valve body provided with an air inlet hole and an air outlet hole, a valve core and a valve cover arranged on the valve body, and the valve cover and the valve body are surrounded to form an air chamber; the valve core is arranged in the gas cavity and assembled at one end of the elastic part, which is far away from the valve cover, the valve core can be plugged at the gas inlet hole under the action of the elastic part by preset pressure so as to isolate the gas inlet hole from the gas cavity, and when the gas flow pressure of the gas inlet hole reaches the preset pressure, the valve core can move to one side close to the valve cover so that the gas inlet hole is communicated with the gas cavity; the valve body comprises an annular valve body main body, a multi-pore silencing piece is attached to the inner wall of the valve body main body, and the air outlet is communicated with the gas chamber through the multi-pore silencing piece. Above-mentioned structure, through the setting of porous amortization piece, can be on the air current gets into the basis that gaseous cavity realized preliminary amortization from the inlet port, carries out further amortization to the air current to realize multistage amortization, improve the noise cancelling effect of atmospheric valve.

Description

Emptying valve

Technical Field

The utility model relates to an exhaust valve field especially relates to an atmospheric valve.

Background

The prior multistage air compressor system or air source pipeline control system needs to perform operations such as air emptying, constant pressure air discharging, overflow air discharging, non-return and the like on air in the system under many conditions. In related applications, an exhaust valve is used for venting. During the exhaust process, the accompanying rapid flow of the air flow generally generates a large noise, thereby affecting the use experience of the exhaust air release valve.

SUMMERY OF THE UTILITY MODEL

According to the embodiment of the utility model, the emptying valve is provided, which comprises a valve body provided with an air inlet hole and an air outlet hole, a valve core and a valve cover arranged on the valve body, wherein a gas cavity is formed by the valve cover and the valve body; the gas cavity is internally provided with an elastic part, the valve core is arranged in the gas cavity and assembled at one end of the elastic part, which is far away from the valve cover, the valve core can be plugged at the gas inlet hole under the action of the elastic part by preset pressure to isolate the gas inlet hole from the gas cavity, and when the gas flow pressure of the gas inlet hole reaches the preset pressure, the valve core can move to one side close to the valve cover to enable the gas inlet hole to be communicated with the gas cavity; the valve body comprises an annular valve body main body, a multi-hole silencing piece is attached to the inner wall of the valve body main body, and the air outlet is communicated with the gas cavity through the multi-hole silencing piece.

In some embodiments, the valve body main body is provided with a plurality of air outlet holes arranged in an array, and the array is arranged in a staggered arrangement or an aligned arrangement.

In some embodiments, the aperture of the air outlet is 1mm to 2 mm.

In some embodiments, the valve body main body comprises a discharge area and a mounting area located at the outer end of the discharge area, the plurality of air outlet holes arranged in an array are uniformly distributed in the discharge area, and the mounting area is in threaded connection with the valve cover.

In some embodiments, the valve body comprises an air inlet end which is arranged at the end part of the valve body main body and is connected with the valve body main body, and the air inlet hole is formed in the middle of the air inlet end;

the valve cover is provided with a matching step surface, one end of the porous silencing piece is abutted against the matching step surface, and the other end of the porous silencing piece is abutted against the inner wall of the air inlet end facing one side of the valve cover.

In some embodiments, a rubber elastic member is disposed between the porous noise damper and the mating step surface.

In some embodiments, the porous sound attenuating member is a porous structure; wherein the porous noise reduction piece is a ceramic noise reduction piece or a powder metallurgy type noise reduction piece; and/or the presence of a gas in the gas,

the valve core is a conical valve core.

In some embodiments, the valve core comprises a mounting portion and a blocking portion located at the end portion of the mounting portion, the mounting portion is formed with a mounting portion inner cavity with an opening facing one side of the valve cover, a limiting hole for fixing an elastic piece is formed in one end, away from the valve cover, of the mounting portion inner cavity, and one end, away from the valve cover, of the elastic piece is fixed in the limiting hole.

In some embodiments, a valve core accommodating cavity elastic element installation cavity is formed in the middle of the valve cover, the elastic element installation cavity and the valve core accommodating cavity are arranged and communicated along the length direction of the atmospheric valve, the installation part is arranged in the valve core accommodating cavity and can move in the valve core accommodating cavity along the length direction of the atmospheric valve, the elastic element is installed in the elastic element installation cavity and extends to the valve core accommodating cavity to be connected with the installation part, and a first step surface is formed at the joint of the valve core accommodating cavity and the elastic element installation cavity.

In some embodiments, a lining is arranged on the inner wall of the valve core accommodating cavity, and the lining is made of a steel-based self-lubricating material; and/or the presence of a gas in the gas,

the valve core containing cavity is provided with a lining on the inner wall, the lining is provided with a slot extending along the length direction of the lining, and the middle part of the lining, which is inclined to the valve body side, is provided with two through holes which are positioned on two sides of the slot and are symmetrically distributed.

The atmospheric valve that this application above-mentioned embodiment provided, through the setting of porous amortization piece, can get into the basis that gas chamber realized preliminary amortization from the inlet port at the air current on, carry out further amortization to the air current to realize multistage amortization, improve the noise cancelling effect of atmospheric valve.

Drawings

FIG. 1 is a schematic structural diagram illustrating an air inlet hole of an air discharge and release valve in a closed state according to an exemplary embodiment of the present application;

FIG. 2 is a schematic view of the exhaust vent valve of FIG. 1 with the inlet vent in an open position;

FIG. 3 is a schematic view of a bushing according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise specified, "front", "back", "lower" and/or "upper", "lower", "left", "right", and the like are for ease of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item identified as preceding "comprises" or "comprising" includes the element or item identified as following "comprising" or "includes", and the equivalents thereof, excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

The application provides a blow-down valve. The vent valve is an exhaust vent valve. The exhaust and air release valve can be applied to a refrigeration system with an air compressor or an air source pipeline control system, and is used for constant-pressure discharge, non-return, noise reduction and the like of gas. For example, the method can be applied to a multi-stage oil-free compressor system and can be arranged between two adjacent compressors.

Referring to fig. 1 and as necessary with reference to fig. 2 and 3, an exhaust and venting valve 100 includes a valve body 1 having an air inlet 101 and an air outlet 103, a valve core 7, and a valve cover 4 installed on the valve body 1, the valve cover 4 and the valve body 1 are surrounded to form an air chamber 102, the air outlet 103 and the air chamber 102 can be communicated through a porous noise reduction member 2, the valve cover 4 is provided with a movable pressure adjustment rod 10, so that the pressure adjustment rod 10 can be fixed at a preset position according to a preset pressure, an elastic member 6 is supported at an inner end of the pressure adjustment rod 10, the valve core 7 is arranged in the air chamber 102 and assembled at a side of the elastic member 6 away from the pressure adjustment rod 10, when the pressure adjustment rod 10 is arranged at the preset position through a screw thread, the valve core 7 can be sealed at the air inlet 101 with the preset pressure to isolate the air inlet 101 from the air chamber 102, when an air flow pressure of the air inlet 101 reaches the preset pressure, the spool 7 can be moved to a side close to the pressure adjustment rod 10 so that the intake hole 101 communicates with the gas chamber 102.

Here, the air inlet 101 may be connected to a solenoid valve, a compressor or an air storage device as a terminal exhaust device.

The pressure of the air flow in the air intake hole 101 as referred to herein reaches a preset pressure, which is understood to be greater than or equal to the preset pressure. That is, when the pressure of the air flow in the air inlet 101 reaches a predetermined pressure (greater than or equal to the predetermined pressure), the valve element 7 is pushed away, so that the air flow enters the air chamber 102.

It should be noted that, the valve element 7 moves towards the side close to the pressure adjustment rod 10, so that the gas chamber 102 is communicated with the gas inlet 101, the volume of the gas chamber 102 is larger than the space between the valve element 7 and the gas inlet 101 for communicating the gas chamber 102 with the gas inlet 101, and when the gas flow enters the gas chamber 102, a certain sound attenuation effect can be realized.

The pressure regulating rod 10 is here connected to the valve cap 4 by means of a screw connection in order to facilitate the adjustment and fixing of the position of the pressure regulating rod. It should be noted that, in other embodiments, the pressure adjustment rod may be disposed on the valve cover in other manners, which is not limited in this application and may be set according to specific situations.

The elastic member 6 here may be a spring.

Therefore, the exhaust and air release valve 100 can flexibly achieve stepless adjustment of pressure within a certain range to achieve discharge and non-return of different pressures, pressure adjustment is achieved through a pressure adjusting rod, the structure is compact and simple, installation is convenient, occupied space is small, and the exhaust and air release valve with the adjustable pressure in a mechanical adjusting mode is beneficial to reducing cost.

In some embodiments, the valve body 1 includes a ring-shaped valve body main body 11 and an air inlet end 12 disposed at an end of the valve body main body 11 and connected to the valve body main body 11, an air inlet hole 101 is formed in a middle of the air inlet end 12, and the valve body main body 11 is provided with a plurality of air outlet holes 103 arranged in an array. Alternatively, the valve body 11 and the intake end 12 may be integrally formed.

The array arrangement referred to herein may be understood as a staggered arrangement, as well as a staggered arrangement.

In some embodiments, the diameter of the outlet holes 103 is 1mm to 2mm, and a silencing discharge hole is formed to perform 3 rd-level silencing on the gas flowing through the outlet holes 103 from the gas chamber 102, so as to further reduce noise and sound of the gas flow.

In some embodiments, the valve body 11 includes a discharge area where a plurality of air outlet holes 103 are uniformly distributed, and a mounting area located at an outer end of the discharge area, and the mounting area is in threaded connection with the valve cover 4.

In some embodiments, the mounting region has an internal thread, the valve cover 4 is provided with a corresponding external thread, and the valve body 1 and the valve cover 4 are assembled by matching the internal thread and the external thread.

Of course, in other embodiments, the mounting region may be provided with external threads, and the valve cover may be correspondingly provided with internal threads that mate with the external threads. In addition, the valve body and the valve cover can also be assembled together in other fixed modes, and the application does not limit the assembly.

In some embodiments, a porous noise reduction part 2 is attached to the inner wall of the valve body main body 11, and the gas outlet 103 and the gas chamber 102 can be specifically communicated through the porous noise reduction part 2. This porous amortization piece 2 set up can carry out 2 nd level amortization to the air current of flowing through exhaust air release valve, combines the one-level amortization of preceding gas chamber 102 and the terminal structure that adopts amortization discharge hole 103 to say, and tertiary amortization can be realized to whole exhaust air release valve, realization amortization that can be better is fallen and is made an uproar.

In some embodiments, the porous silencer element 2 may be a ceramic silencer element, a powder metallurgy silencer element, or the like, all characterized by a porous structure.

In some embodiments, the valve cover 4 may further be formed with a fitting stepped surface 412 inside the external thread, and one end of the porous silencer 2 abuts against the fitting stepped surface 412 and the other end abuts against an inner wall of the side of the intake end 12 facing the valve cover 4. A rubber elastic member 3 may be further provided between the porous noise damper 2 and the fitting step surface 412 to axially fix the porous noise damper 2 and prevent the over-pressing protection. Alternatively, the rubber elastic member 3 may be a seal ring structure.

In some embodiments, the valve element 7 includes a mounting portion 71 and a blocking portion 72 at an end of the mounting portion 71, and the mounting portion 71 is formed with a mounting portion inner cavity that opens toward the side of the valve cover 4. The one end that the installation department inner chamber deviates from valve gap 4 is equipped with the spacing hole that is used for fixed elastic component, and the one end that elastic component 6 deviates from valve gap 4 is fixed in the spacing hole to reduce the relative motion between the installation department inner chamber wall of elastic component 6 and case 7, reduce the wearing and tearing of case 7 installation department inner chamber wall.

In some embodiments, the spool 7 is a conical spool. The flow guide surface 721 of the blocking part 72 facing the air inlet hole 101 is a conical surface protruding from the middle, so that when the air inlet hole 101 is opened, the air flows into the air chambers on both sides.

Further, a valve core accommodating cavity 105, an adjusting rod mounting cavity and an elastic piece mounting cavity 107 are formed in the middle of the valve cover 4, and the adjusting rod mounting cavity, the elastic piece mounting cavity 107 and the valve core accommodating cavity 105 are arranged along the length direction L of the exhaust and air release valve 100 and are sequentially communicated. The mounting portion 71 is disposed in the valve element accommodating chamber 105 and can move in the valve element accommodating chamber 105 along the length direction L of the exhaust release valve 100, so that the blocking portion 72 can move between the outer end of the valve element accommodating chamber 105 and the inner end of the air inlet hole 101. The elastic piece 6 is installed in the elastic piece installation cavity 107 and extends to the valve core accommodating cavity 105, a first step surface 1051 is formed at the joint of the valve core accommodating cavity 105 and the elastic piece installation cavity 107 so as to increase a chamfer for guiding the elastic piece, part of the pressure adjusting rod 10 is arranged in the adjusting rod installation cavity and can move in the adjusting rod installation cavity along the length direction L of the exhaust blow-down valve 100, and the inner end of the pressure adjusting rod 10 is abutted against the elastic piece 6.

In some embodiments, the inner end of the pressure adjusting rod 10 is provided with a pressing plate 8, and the pressure adjusting rod 10 is abutted with the elastic member 6 through the pressing plate 8. The arrangement of the pressing plate 8 is beneficial to preventing the valve cover 4 from being abraded by the elastic part 6 in long-term use, and the service life of the valve cover 4 is prolonged.

In some embodiments, a breathing cavity 106 is formed between the pressing plate 8 and the bottom of the elastic member mounting cavity 107, the periphery of the adjusting rod mounting cavity is provided with first breathing holes 104 arranged in an array manner, the pressing plate 8 is provided with second breathing holes 108, the breathing cavity 106 is communicated with the outside through the first breathing holes 104, and the breathing cavity 106 is communicated with the elastic member mounting cavity 107 through the second breathing holes 108, so that the valve element accommodating cavity 105 on one side of the valve element 7 close to the pressure adjusting rod is communicated with the outside, which is beneficial to realizing the quick movement of the valve element 7, and improving the exhaust speed, thereby improving the exhaust efficiency and realizing the quick exhaust function.

Further, a bush 5 is arranged on the inner wall of the valve core accommodating cavity 105.

In some embodiments, the liner 5 is made of a self-lubricating material, such as steel-based PTFE, and achieves the functions of lubrication-free and wear-resistant of the liner.

As shown in fig. 3, the bushing 5 is provided with a slot 51 extending along the length direction of the bushing 5, and two through holes 52 located at two sides of the slot 51 and symmetrically distributed are opened at the side of the eccentric valve body 1 in the middle of the bushing 5, so as to realize rapid installation and maintenance of the bushing 5 at normal temperature. The center of the liner 5 is deviated from the valve body 1 side, and the center of the liner 5 is closer to the end of the liner 5 toward the valve body 1.

Further, in some embodiments, the valve cover 4 is provided at an outer side thereof with an anti-release member coupled with the pressure adjustment lever 10 to fix the pressure adjustment lever 10 at a predetermined position. In some embodiments, the locking member may be a locknut 9, although in other embodiments, the locking member may be other types of fastening devices.

Referring to fig. 2, based on the above structure of the exhaust and release valve 100, when the pressure of the airflow outside the air inlet 101 reaches a predetermined pressure (greater than or equal to the predetermined pressure) during the operation of the exhaust and release valve 100, the valve element 7 is pushed open, so that the airflow enters the gas chamber 102, further enters the gas chamber 102 along the flow guiding surface 721 of the valve element 7, and then flows through the multi-aperture silencer 2 and the air outlet 103 in sequence to be discharged out of the exhaust and release valve 100. When the air flow enters the gas chamber 102 through the flow guide surface 721, primary silencing is realized, then the air flow enters the porous silencing piece 2 for secondary silencing, and finally the air flow is subjected to tertiary silencing through the air outlet 103 of the valve body 1, namely, the exhaust blow-down valve realizes preset pressure discharge as required, and simultaneously can reduce pneumatic noise during exhaust to the maximum extent. When the air flow pressure outside the air inlet hole 101 is lower than the set pressure (or negative pressure occurs) of the elastic part, the valve core 7 blocks the air inlet hole 101 under the action force of the elastic part 6 to close the air inlet hole 101, and effectively isolates the air inlet hole 101 from the air chamber, so that the phenomenon of suck-back due to the communication between the outside atmosphere and the inside of the system can be prevented, and the reverse stopping can be realized to protect the system when the constant pressure discharge or emptying is well realized. Taking a system with a compressor as an example, when the pressure of the airflow outside the air inlet 101 is lower than the set pressure (or negative pressure occurs) of the elastic member, the phenomenon of suck-back due to the communication between the outside atmosphere and the system can be prevented, thereby preventing damage to the main machine of the compressor. For a system with a multi-stage compressor, the exhaust and air release valve is arranged on a gas pipeline between two adjacent compressors, so that the fault caused by the over-standard interstage pressure can be prevented, and the non-return can be realized to protect the system when the constant-pressure discharge or air release is realized.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above embodiments, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims (10)

1. The emptying valve is characterized by comprising a valve body, a valve core and a valve cover, wherein the valve body is provided with an air inlet hole and an air outlet hole; the gas cavity is internally provided with an elastic part, the valve core is arranged in the gas cavity and assembled at one end of the elastic part, which is far away from the valve cover, the valve core can be plugged at the gas inlet hole under the action of the elastic part by preset pressure to isolate the gas inlet hole from the gas cavity, and when the gas flow pressure of the gas inlet hole reaches the preset pressure, the valve core can move to one side close to the valve cover to enable the gas inlet hole to be communicated with the gas cavity; the valve body comprises an annular valve body main body, a multi-hole silencing piece is attached to the inner wall of the valve body main body, and the air outlet is communicated with the gas cavity through the multi-hole silencing piece.

2. The vent valve of claim 1, wherein the valve body defines a plurality of outlet holes arranged in an array, the array being staggered or aligned.

3. The vent valve of claim 2, wherein the vent holes have a diameter of 1mm to 2 mm.

4. A blow valve according to claim 2 or 3, characterised in that the valve body comprises a discharge area and a mounting area at the outer end of the discharge area, the plurality of outlet holes arranged in an array are evenly distributed in the discharge area, and the mounting area is in threaded connection with the valve cover.

5. The vent valve as recited in claim 4 wherein the valve body comprises an air inlet end disposed at an end of the valve body main body and connected to the valve body main body, the air inlet hole being formed at a middle portion of the air inlet end;

the valve cover is provided with a matching step surface, one end of the porous silencing piece is abutted against the matching step surface, and the other end of the porous silencing piece is abutted against the inner wall of the air inlet end facing one side of the valve cover.

6. The vent valve as recited in claim 5 wherein a rubber spring is disposed between the porous sound attenuating member and the mating step surface.

7. The vent valve of claim 1, wherein the porous sound attenuating member is a porous structure; wherein the porous noise reduction piece is a ceramic noise reduction piece or a powder metallurgy type noise reduction piece; and/or the presence of a gas in the gas,

the valve core is a conical valve core.

8. The vent valve as recited in claim 1 wherein the valve core includes a mounting portion and a blocking portion at an end of the mounting portion, the mounting portion defining a mounting portion cavity opening to a side of the valve cover, the mounting portion cavity having a limiting hole at an end facing away from the valve cover for securing an elastic member, the elastic member being secured in the limiting hole at an end facing away from the valve cover.

9. The vent valve as claimed in claim 8, wherein a valve core accommodating chamber and an elastic member mounting chamber are formed in the middle of the valve cover, the elastic member mounting chamber and the valve core accommodating chamber are arranged and communicated along the length direction of the vent valve, wherein the mounting portion is arranged in the valve core accommodating chamber and can move along the length direction of the vent valve in the valve core accommodating chamber, the elastic member is mounted in the elastic member mounting chamber and extends to the valve core accommodating chamber to be connected with the mounting portion, and a first step surface is formed at the joint of the valve core accommodating chamber and the elastic member mounting chamber.

10. The atmospheric valve of claim 9, characterized in that the inner wall of the valve core accommodating cavity is provided with a lining, and the lining is made of steel-based self-lubricating materials; and/or the presence of a gas in the gas,

the valve core containing cavity is provided with a lining on the inner wall, the lining is provided with a slot extending along the length direction of the lining, and the middle part of the lining, which is inclined to the valve body side, is provided with two through holes which are positioned on two sides of the slot and are symmetrically distributed.

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