CN215522120U - Low-temperature combined pressure regulating valve - Google Patents
Low-temperature combined pressure regulating valve Download PDFInfo
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- CN215522120U CN215522120U CN202121221363.XU CN202121221363U CN215522120U CN 215522120 U CN215522120 U CN 215522120U CN 202121221363 U CN202121221363 U CN 202121221363U CN 215522120 U CN215522120 U CN 215522120U
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- pressure regulating
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Abstract
A low-temperature combined pressure regulating valve is characterized in that an upper cover of the pressure regulating valve is connected with a valve body, a pressure regulating screw is screwed into a cavity of the upper cover from the top of the upper cover and abuts against the top of an upper pressure block, the bottom of the upper pressure block abuts against the upper end of a pressure regulating spring, the lower end of the pressure regulating spring abuts against the top of a lower pressure block, the bottom of the lower pressure block abuts against a diaphragm, the bottom of the diaphragm is tangent to a movable upper valve seat, a pressure reducing interface, a pressure boosting interface and an air inlet interface are arranged on the side wall of the valve body, an upper valve cavity, a lower valve cavity and a valve cavity channel for connecting the upper valve cavity and the lower valve cavity are arranged in the valve body, the pressure reducing interface is communicated with the upper valve cavity, the pressure boosting interface is communicated with the valve cavity channel, the air inlet interface is communicated with the lower valve cavity, and a sealing gasket is arranged at the bottom end of the upper valve seat and the valve body.
Description
Technical Field
The utility model relates to the technical field of pressure regulating valves, in particular to a low-temperature combined pressure regulating valve.
Background
The Dewar flask is usually matched with a low-temperature combined pressure regulating valve, and the effect of stabilizing the pressure of the Dewar flask is realized through two major functions of pressurization and depressurization of the low-temperature combined pressure regulating valve. Patent number is CN201520365075. X's a low temperature combination air-vent valve among the prior art, adopt movable upper valve seat's last valve clack sealing port and spherical upper valve clack laminating, cut off the interface that steps up and step down the interface intercommunication, to the spherical upper valve clack and the precision of last valve clack sealing port also higher and manufacturing cost when using, it is sealed incomplete also to have simultaneously, make pressure boost exit end and decompression exit end communicate with each other, the dewar bottle produces gasification pressure boost naturally, reduce the life of dewar bottle, for solving above-mentioned problem, need improve low temperature combination formula air-vent valve.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to realize the related functions of the background technology, the utility model provides a low-temperature combined pressure regulating valve.
The technical scheme is as follows: a cryogenic combined pressure regulating valve comprising: a lower pressure block and a diaphragm configured to sealingly separate the upper cover and the valve body,
a first valve chamber passage configured to communicate the upper valve chamber at the top and the lower valve chamber at the bottom of the valve body,
a lower valve clack configured to communicate or isolate the first valve chamber passage and the lower valve chamber,
the pressure reducing interface is communicated with the upper valve cavity, the pressure increasing interface is communicated with the first valve cavity channel, and the air inlet interface is communicated with the lower valve cavity;
the bottom of the upper cover is provided with a pressure regulating screw rod, the top of the lower pressing block is pressed against a pressure regulating spring, the bottom of the lower pressing block is pressed against a diaphragm, the diaphragm is clamped between the upper cover and the valve body, a lower valve seat is arranged on the inner wall of the first valve cavity channel connected with the lower valve cavity, a valve clack core is arranged at the position of the lower valve clack corresponding to the lower valve seat, the bottom of the valve body is provided with a rear cover, and a reset spring is arranged between the rear cover and the lower valve clack;
the upper valve cavity is internally provided with a movable upper valve seat tangent to the diaphragm, and the bottom end of the upper valve seat is in contact with the valve body and is provided with a sealing gasket.
The utility model realizes the following beneficial effects:
according to the utility model, by arranging the sealing gasket, when the low-temperature combined pressure regulating valve does not work, the pressure reducing outlet end is not communicated with the pressure increasing outlet end, so that the Dewar flask is not naturally gasified and pressurized, and the service life of the Dewar flask is prolonged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is an overall structure of a combined pressure regulating valve;
fig. 2 is an enlarged schematic view of a combined voltage regulating section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples
Referring to fig. 1-2, a low temperature combined pressure regulating valve comprising: a lower pressure block 13 and a diaphragm 20 configured to seal and separate the upper cap 10 and the valve body 30,
a first valve chamber passage 32 configured to communicate the upper valve chamber 31 at the top and the lower valve chamber 33 at the bottom of the valve body 30,
a lower valve flap 37 configured to communicate or isolate the first valve chamber passage 32 and the lower valve chamber 33,
the pressure reducing interface 36 is communicated with the upper valve cavity 31, the pressure increasing interface 35 is communicated with the first valve cavity channel 32, and the air inlet interface is communicated with the lower valve cavity 33;
the top of the upper cover 10 is provided with a pressure regulating screw 11, the top of the lower pressure block 13 is pressed against the pressure regulating spring 12, the bottom of the lower pressure block 13 is pressed against the diaphragm 20, the diaphragm 20 is clamped between the upper cover 10 and the valve body 30, the inner wall of the first valve cavity passage 32 connected with the lower valve cavity 33 is provided with a lower valve seat 34, the lower valve clack 37 is provided with a valve clack core 38 at the corresponding position of the lower valve seat 34, the bottom of the valve body 30 is provided with a rear cover 50, and a return spring 39 is arranged between the rear cover 50 and the lower valve clack 37;
the upper valve cavity 31 is internally provided with a movable upper valve seat 40 tangent to the diaphragm 20, and the bottom end of the upper valve seat 40 is provided with a sealing gasket 41 in contact with the valve body.
In this embodiment, the sealing gasket 41 is made of PTFE, and PTFE is tetrafluoroethylene.
The working principle of the utility model is as follows: when the low-temperature combined type pressure regulating valve is installed on the Dewar flask, the additional stop valve on the Dewar flask is closed, the low-temperature combined type pressure regulating valve does not work, the valve is in the maximum opening state, the movable upper valve seat 40 and the PTFE sealing gasket 41 are contacted and sealed with the valve body 30, at the moment, the pressure reducing outlet 36 connected with the gas phase space of the Dewar flask is not communicated with the pressure increasing outlet 35 connected with the pressure increasing coil pipe of the Dewar flask, so that the Dewar flask is not naturally gasified and pressurized, and the service life of the Dewar flask is prolonged.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (2)
1. A cryogenic combined pressure regulating valve comprising: a lower pressure block and a diaphragm configured to sealingly separate the upper cover and the valve body,
a first valve chamber passage configured to communicate the upper valve chamber at the top and the lower valve chamber at the bottom of the valve body,
a lower valve clack configured to communicate or isolate the first valve chamber passage and the lower valve chamber,
the pressure reducing interface is communicated with the upper valve cavity, the pressure increasing interface is communicated with the first valve cavity channel, and the air inlet interface is communicated with the lower valve cavity;
the top of the upper cover is provided with a pressure regulating screw rod, the top of the lower pressing block is pressed against a pressure regulating spring, the bottom of the lower pressing block is pressed against a diaphragm, the diaphragm is clamped between the upper cover and the valve body, a lower valve seat is arranged on the inner wall of the first valve cavity channel connected with the lower valve cavity, a valve clack core is arranged at the position of the lower valve clack corresponding to the lower valve seat, the bottom of the valve body is provided with a rear cover, and a reset spring is arranged between the rear cover and the lower valve clack;
the valve is characterized in that a movable upper valve seat tangent to the diaphragm is arranged in the upper valve cavity, and a sealing gasket is arranged at the bottom end of the upper valve seat and in contact with the valve body.
2. The low-temperature combined pressure regulating valve according to claim 1, wherein said sealing gasket is a PTFE sealing gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121221363.XU CN215522120U (en) | 2021-06-02 | 2021-06-02 | Low-temperature combined pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121221363.XU CN215522120U (en) | 2021-06-02 | 2021-06-02 | Low-temperature combined pressure regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215522120U true CN215522120U (en) | 2022-01-14 |
Family
ID=79806312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121221363.XU Active CN215522120U (en) | 2021-06-02 | 2021-06-02 | Low-temperature combined pressure regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215522120U (en) |
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2021
- 2021-06-02 CN CN202121221363.XU patent/CN215522120U/en active Active
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