CN212986158U - Pressure-adjustable piston type pressure reducing valve - Google Patents
Pressure-adjustable piston type pressure reducing valve Download PDFInfo
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- CN212986158U CN212986158U CN202021189683.7U CN202021189683U CN212986158U CN 212986158 U CN212986158 U CN 212986158U CN 202021189683 U CN202021189683 U CN 202021189683U CN 212986158 U CN212986158 U CN 212986158U
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Abstract
In order to solve the problem that exists among the background art, the utility model provides a but pressure regulating piston relief pressure valve, this relief pressure valve include the valve body, and valve body upper portion is provided with the valve pocket, and the valve pocket bottom is provided with inlet channel and air outlet channel, is provided with the piston that can reciprocate in the valve pocket, the upper portion of piston is provided with pressure regulating mechanism, pressure regulating mechanism is adjustable including setting up the pressure regulating spring on piston upper portion, pressure regulating spring to the elasticity of piston, makes invariable piston thrust increase a changeable spring force to the pressure of giving vent to anger that makes this relief pressure valve becomes adjustable by the invariant, has improved the application scope of product by a wide margin, and the product air output is reliable and stable, has good market competition.
Description
Technical Field
The utility model relates to a gaseous relief pressure valve especially relates to a piston relief pressure valve of adjustable pressure.
Background
Based on the characteristics of gas and the transportation requirements thereof, the gas is usually compressed, and when the gas is delivered to an application terminal, decompression treatment is required, that is, the gas is changed from high pressure to low pressure. Therefore, an efficient gas pressure reducing valve needs to be adjustable in both pressure and flow.
The traditional gas pressure reducing valve has two pressure reducing modes, one is a slide block type pressure reducing valve, and the defects are that the product structure is complex, the outlet pressure fluctuation is large when the inlet pressure (usually the pressure of a gas cylinder or a pipeline) changes, and the output gas flow is unstable; secondly, piston type pressure reduction is adopted, and the defects that the air outlet pressure of a product after being shaped cannot be adjusted, and the application range of the product is narrow. How to further optimize the structure of the pressure reducing valve, improve the applicability and the reliability of the product, and simultaneously achieve the purposes of adjustable air outlet pressure and stable air outlet quantity with lower cost, which is a subject always explored and solved in the industry.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the background art, the utility model provides a pressure-adjustable piston relief pressure valve, this relief pressure valve set up the pressure regulating device of constituteing by the spring at the piston rear end of traditional piston relief pressure valve, and pressure regulating device increases a changeable spring force for invariable piston thrust to the pressure of giving vent to anger that makes this relief pressure valve becomes adjustable by the invariant, has improved the application scope of product by a wide margin, and the product air output is reliable and stable, has good market competition.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a pressure-adjustable piston type pressure reducing valve, includes the valve body, and valve body upper portion is provided with the valve pocket, and the valve pocket bottom is provided with inlet channel and air outlet channel, is provided with the piston that can reciprocate in the valve pocket, and the piston motion seals inlet channel and air outlet channel after the valve pocket bottom, its characterized in that, the upper portion of piston is provided with pressure regulating mechanism, pressure regulating mechanism is including setting up the pressure regulating spring on piston upper portion, and pressure regulating spring is adjustable to the elasticity of piston.
And a spring gasket is arranged on the upper part of the pressure regulating spring.
And an elastic force adjusting mechanism is arranged above the spring gasket and realizes the elastic force adjustment of the piston by changing the compression degree of the pressure adjusting spring.
The elasticity adjusting mechanism comprises a valve core and a knob positioned at the top of the valve core, the bottom of the valve core is abutted against the center of the spring gasket, the valve core is driven to move up and down after the knob is rotated, and the compression degree of the pressure regulating spring is changed by the up-and-down movement of the valve core.
The elasticity adjustment mechanism comprises an air valve cover, the air valve cover seals the pressure adjustment spring and the spring gasket in the cavity between the air valve cover and the valve body, the air valve cover and the valve body can move relatively, the inner top wall of the air valve cover abuts against the spring gasket, and the air valve cover moves relative to the valve body to change the compression degree of the pressure adjustment spring.
The air valve cover is in threaded connection with the valve body.
And the valve body is also provided with a limiting screw for limiting the air valve cover to be separated from the valve body.
The air inlet channel is connected with an air inlet arranged on the side part of the valve body, and the air outlet channel is connected with an air outlet arranged at the bottom of the valve body.
And a safety valve is arranged on the air outlet channel.
The air inlet is connected with an air inlet rod, and the air outlet is connected with an air outlet nozzle.
Relief pressure valve, set up pressure regulating spring and elasticity adjustment mechanism at the piston rear end, increase a changeable spring force for invariable piston thrust to make the product pressure of giving vent to anger become adjustable by the invariant, improved the application scope of product by a wide margin, the product air output is reliable and stable, has good market competition.
Drawings
The present invention will be further explained with reference to the accompanying drawings
Fig. 1 is a schematic cross-sectional view of a pressure reducing valve according to embodiment 1 of the present invention;
fig. 2 is a schematic cross-sectional view of a pressure reducing valve according to embodiment 2 of the present invention;
fig. 3 is a schematic cross-sectional structure view of the pressure reducing valve according to embodiment 3 of the present invention.
Wherein:
the valve comprises a valve body 10, a valve cavity 11, an annular groove 12, an air inlet channel 13, an air outlet channel 14, an air outlet 15, an air inlet 16, a piston 20, an air valve cover 31, a pressure regulating spring 32, a spring gasket 33, a valve core 34, a knob switch 35, a limiting screw 37, an air outlet nozzle 50, an air inlet rod 60 and a safety valve 70.
Detailed Description
The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings:
example 1
As shown in fig. 1, the pressure-adjustable piston type pressure reducing valve includes a valve body 10, a valve cavity 11 is provided at an upper portion of the valve body 10, an air outlet 15 is provided at a bottom of the valve body 10, an air inlet 16 is provided at a side of the valve body 10, an air inlet channel 13 and an air outlet channel 14 which are independent of each other are provided at a bottom of the valve cavity 11, the air inlet 16 is communicated with the valve cavity 11 through the air inlet channel 13, and the air outlet 15 is communicated with the valve cavity 11 through.
The valve cavity 11 is provided with a piston 20, the piston 20 can move up and down in the valve cavity 11, when the piston 20 moves to the bottom of the valve cavity 11, the piston 20 seals the air inlet channel 13 and the air outlet channel 13, at this time, the pressure reducing valve is in a closed state, and the air inlet channel between the air inlet 16 and the air outlet 15 is disconnected. When the piston 20 moves upward, the bottom of the piston 20 leaves the bottom of the valve chamber 11, and gas enters the valve chamber 11 from the gas inlet 16 along the gas inlet channel 13 and then exits from the gas outlet 15 along the gas outlet channel 14, at which time the pressure reducing valve is in an open state.
In the present embodiment, the piston 20 has two parts, a thick section and a thin section, the thin section of the piston 20 extends into the valve chamber 11, and the thick section of the piston 20 is located at the upper part of the thin section and outside the valve chamber 11.
An annular groove 12 is formed in the upper portion of the valve body 10 and located on the outer side of the valve cavity 11, a piston spring is arranged in the annular groove 12, the bottom of the piston spring is fixed to the bottom of the annular groove 12, and the top of the piston spring is fixed to the position below the thick section of the piston 20. The upper part of the annular groove 12 is provided with an air valve cover 31, the bottom of the air valve cover 31 is in threaded connection with the inner wall of the annular groove 12, so that an air valve cavity is formed between the inner wall of the air valve cover 31 and the annular groove 12, and the piston 20 is arranged in the air valve cavity.
The utility model discloses an improvement lies in that the upper portion that lies in piston 20 in the pneumatic valve chamber is provided with pressure regulating mechanism, pressure regulating mechanism is including setting up the pressure regulating spring 32 at piston 20 top, pressure regulating spring 32's top is fixed with spring shim 33, spring shim 33's top is provided with case 34, the bottom of case 34 supports and leans on the central authorities at spring shim 33, the top of case 34 is outwards stretched out from the upper portion central authorities of pneumatic valve lid 31, the outer end that case 34 stretches out pneumatic valve lid 31 is fixed with knob switch 35, rotate knob switch 35, can drive case 34 and remove in the vertical direction, thereby can adjust the distance between spring shim 33 and the piston 20, make pressure regulating spring 32 changeable to piston 20's spring force, thereby make this relief pressure valve become the adjustable pressure.
Preferably, the air inlet 16 is connected with an air inlet rod 60, and the air outlet 15 is connected with an air outlet nozzle 50.
A safety cavity is arranged on the air outlet channel 14, and a safety valve 70 is arranged in the safety cavity.
Further, the outer wall of the thick section at the top of the piston 20 abuts against the inner wall of the air valve cover 31, and a sealing rubber ring 21 is arranged at the contact position of the thick section of the piston and the inner wall of the air valve cover 31. Similarly, in order to maintain the air tightness, a sealing rubber ring 21 is also arranged on the outer wall of the thin section of the piston 20 located in the valve cavity 11, and is used for maintaining the air tightness between the side wall of the piston and the inner wall of the valve cavity 11. An annular groove is arranged on the side wall of the valve core 34, and a sealing rubber ring 21 is arranged in the annular groove.
Example 2
As shown in fig. 2, the pressure reducing valve of the present embodiment has the same basic structure as that of embodiment 1, except that a sealing rubber ring on a valve core 34 is replaced with a spring washer 33, an annular groove is provided on an outer circumferential side wall of the spring washer 33, and a sealing rubber ring 21 is provided in the annular groove.
Example 3
As shown in fig. 3, the pressure reducing valve of the present embodiment has the same basic structure as that of embodiment 1, except that the mechanism for pushing the spring washer 33 is different, in the present embodiment, the whole body of the air valve cover 31 is screwed on the inner wall of the annular groove 12, the inner top wall of the air valve cover 32 abuts against the spring washer 33 of the pressure regulating mechanism, the air valve cover 31 is rotated, and the air valve cover 31 moves up and down relative to the annular groove 12, so that the spring washer 33 can be driven to move up and down, and the elastic force of the pressure regulating spring 32 can. In order to prevent the air valve cover 31 from being unscrewed from the annular groove 12, a limit screw 37 is provided at the upper end of the inner wall of the annular groove 12.
Those skilled in the art will recognize that a wide variety of modifications, alterations, and combinations can be made with respect to the above described embodiments without departing from the scope of the invention, and that such modifications, alterations, and combinations are to be viewed as being within the ambit of the inventive concept.
Claims (10)
1. The utility model provides a pressure-adjustable piston type pressure reducing valve, includes the valve body, and valve body upper portion is provided with the valve pocket, and the valve pocket bottom is provided with inlet channel and air outlet channel, is provided with the piston that can reciprocate in the valve pocket, and the piston motion seals inlet channel and air outlet channel after the valve pocket bottom, its characterized in that, the upper portion of piston is provided with pressure regulating mechanism, pressure regulating mechanism is including setting up the pressure regulating spring on piston upper portion, and pressure regulating spring is adjustable to the elasticity of piston.
2. A pressure-regulating piston-type pressure-reducing valve as claimed in claim 1, characterized in that the upper part of the pressure-regulating spring is provided with a spring washer.
3. The pressure-adjustable piston-type pressure reducing valve as claimed in claim 2, wherein an elastic force adjusting mechanism is provided above the spring washer, and the elastic force adjusting mechanism adjusts the elastic force of the piston by changing the degree of compression of the pressure-adjusting spring.
4. The pressure-adjustable piston type pressure reducing valve according to claim 3, wherein the elasticity adjusting mechanism comprises a valve core and a knob positioned at the top of the valve core, the bottom of the valve core abuts against the center of the spring gasket, the valve core is driven to move up and down after the knob is rotated, and the compression degree of the pressure adjusting spring is changed by the up and down movement of the valve core.
5. A pressure regulating piston type pressure reducing valve as claimed in claim 3 wherein the spring force regulating mechanism includes an air valve cover which closes the pressure regulating spring and a spring washer in a cavity between the air valve cover and the valve body, the air valve cover and the valve body being relatively movable, an inner top wall of the air valve cover abutting against the spring washer, the air valve cover being movable relative to the valve body to vary the compression of the pressure regulating spring.
6. A pressure regulating piston type pressure reducing valve as claimed in claim 5 wherein the valve cover is threadably connected to the valve body.
7. The pressure-adjustable piston type pressure-reducing valve as claimed in claim 6, wherein the valve body is further provided with a limit screw for limiting the escape of the valve cover from the valve body.
8. A pressure-regulating piston-type pressure-reducing valve according to claim 1, wherein the inlet passage is connected to an inlet port provided at a side portion of the valve body, and the outlet passage is connected to an outlet port provided at a bottom portion of the valve body.
9. A pressure adjustable piston relief valve as claimed in claim 8, wherein a relief valve is provided in said outlet passage.
10. A pressure-regulating piston-type pressure-reducing valve as claimed in claim 9, wherein said inlet port is connected to an inlet rod and said outlet port is connected to an outlet nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189683.7U CN212986158U (en) | 2020-06-23 | 2020-06-23 | Pressure-adjustable piston type pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189683.7U CN212986158U (en) | 2020-06-23 | 2020-06-23 | Pressure-adjustable piston type pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212986158U true CN212986158U (en) | 2021-04-16 |
Family
ID=75424424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021189683.7U Active CN212986158U (en) | 2020-06-23 | 2020-06-23 | Pressure-adjustable piston type pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212986158U (en) |
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2020
- 2020-06-23 CN CN202021189683.7U patent/CN212986158U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210526 Address after: 528000 room 402, yucaige, jinyuhua mansion, Guicheng Street, Nanhai District, Foshan City, Guangdong Province Patentee after: Wang Shaohua Address before: 522000 No.154, songwangding new house, Songshan village, Yuecheng Town, Lancheng, Jiedong District, Jieyang City, Guangdong Province Patentee before: Wang Haosheng |
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| TR01 | Transfer of patent right |