CN212719192U - Pressure reducing and stabilizing valve - Google Patents
Pressure reducing and stabilizing valve Download PDFInfo
- Publication number
- CN212719192U CN212719192U CN202020508175.4U CN202020508175U CN212719192U CN 212719192 U CN212719192 U CN 212719192U CN 202020508175 U CN202020508175 U CN 202020508175U CN 212719192 U CN212719192 U CN 212719192U
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- Prior art keywords
- piston
- valve
- channel
- valve body
- air inlet
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- Expired - Fee Related
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- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 210000004907 gland Anatomy 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 8
- 230000009471 action Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a pressure reducing and stabilizing valve, which comprises a valve body, the upper end of the valve body is fixedly provided with a pressure cap, a spring seat, a gland and a piston are sequentially arranged in the valve body from top to bottom, the lower end of the valve body is fixedly provided with a joint, an air inlet channel is arranged on the joint, an air outlet channel is arranged on the side surface of the valve body, the piston is moved up and down and is used for communicating or closing the air inlet channel and the air outlet channel, a valve channel is arranged between the air inlet channel and the air outlet channel, the valve channel is arranged along the up-and-down direction, the lower end of the piston is provided with an annular sealing ring, and when the piston moves; an air chamber is formed between the gland and the piston, a small vent hole is formed in the piston, and the small vent hole is communicated with the air chamber and the air inlet channel. Has the advantages of small volume, good pressure reduction performance and capability of keeping the flow rate of higher (constant) pressure.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to gaseous fire extinguishing systems's decompression surge damping valve.
Background
The pressure reducing and stabilizing valve has the functions that high-pressure gas (fire extinguishing agent) which can be rapidly input in fire alarm is output at constant pressure after being reduced in pressure, and overpressure impact caused by the input of the high-pressure gas (fire extinguishing agent) to downstream connecting equipment is eliminated; the fire extinguishing agent can obtain larger kinetic energy in the effective time, keep higher (constant) flow velocity and prolong the conveying distance of the fire extinguishing agent. The existing pressure reducing and stabilizing valve generally reduces pressure by controlling the flow of the valve through the pressure of an air outlet and the action of a spring by input high-pressure gas (fire extinguishing agent). However, the pressure reducing and stabilizing valve of the above structure has the following disadvantages:
1) since the pressure reduction of the pressure reducing valve is controlled by a spring, the higher the set value of the outlet pressure of the high-pressure gas (fire extinguishing agent) after pressure reduction, the larger the spring for controlling the pressure reduction becomes, and therefore, the volume of the pressure reducing valve becomes large, and the manufacturing cost becomes high.
2) Meanwhile, the volume of a spring for controlling pressure reduction and the volume of the pressure reducing valve are reduced, the flow aperture of a valve in the pressure reducing valve is also reduced, high-pressure gas (fire extinguishing agent) is easy to form and cannot be sprayed in effective time after being reduced, and the fire extinguishing requirement cannot be met.
3) In addition, the volume of a spring and a pressure reducing valve for controlling pressure reduction is reduced, the outlet pressure of high-pressure gas (fire extinguishing agent) after pressure reduction cannot reach a set value, and the valve is easy to lock.
Therefore, how to improve the existing pressure reducing and stabilizing valve to overcome the above disadvantages is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a small, the pressure reduction performance is good to can keep the velocity of flow of higher (invariable) pressure, prolong fire extinguishing agent delivery distance, reach best fire extinguishing effect's decompression surge damping valve.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a pressure reducing and stabilizing valve comprises a valve body, wherein a pressing cap is fixedly arranged at the upper end of the valve body, a spring seat, a pressing cover and a piston are sequentially arranged in the valve body from top to bottom, a joint is fixedly arranged at the lower end of the valve body, an air inlet channel is formed in the joint, an air outlet channel is formed in the side surface of the valve body, and the piston moves up and down and is used for communicating or closing the air inlet channel and the air outlet channel; the method is characterized in that:
a valve channel is arranged between the air inlet channel and the air outlet channel, the valve channel is arranged along the vertical direction, an annular sealing ring is arranged at the lower end of the piston, and when the piston moves upwards, the annular sealing ring is abutted against the inner wall of the valve channel for sealing;
an air chamber is formed between the gland and the piston, a small vent hole is formed in the piston, and the small vent hole is communicated with the air chamber and the air inlet channel.
As an improvement, the lower end of the piston is provided with a flow guide nut, and the annular sealing ring is tightly pressed and fixed between the piston and the flow guide nut; a flow guide small hole is formed in the flow guide nut and communicated with the small vent hole;
bosses extend from the upper surface and the lower surface of the annular sealing ring, and corresponding concave parts are arranged on the piston and the diversion nut; and a release small hole is formed in the concave part of the flow guide nut and is communicated with the annular sealing ring and the air inlet channel.
As an improvement, a pressing ring is arranged between the pressing cap and the spring.
The working principle of the scheme is as follows:
normally the valve is in an open state; when high-pressure gas is input into the gas inlet channel, the high-pressure gas flows from the gas inlet channel to the gas outlet channel through the valve channel, and when the gas pressure in the gas outlet channel reaches a certain value, the gas pushes the piston to compress the spring to move upwards, so that the valve is closed; when the gas flows out of the gas outlet channel to reduce the gas pressure in the gas outlet channel, the piston moves downwards under the action of the spring pressure to open the valve, and gas circulation-valve closing-valve opening-gas circulation is formed; the pressure of the air outlet channel never exceeds the set value, and the fluctuation constant pressure is kept.
Compared with the prior art, the utility model has the advantages of:
1) because the valve body and the annular sealing ring on the piston are inner hole sealing contact valves, the stress of the piston caused by sealing contact can be reduced, and the stress strength of the piston is ensured.
2) Because the piston is in sealing contact with the gland to form an air chamber, and the air chamber is communicated with the air inlet channel through a small vent hole in the piston and a small guide hole in the guide nut; when high-pressure gas is input into the gas inlet channel, the high-pressure gas simultaneously enters the gas chamber through the flow guide small hole of the flow guide nut and the vent small hole in the piston, and because the gas chamber is of a sealed structure, the area difference can generate acting force for pressing the piston to move downwards, which is equal to increasing the downward acting force of the spring, so that the spring can correspondingly reduce the set spring force; the spring wire is selected to be smaller as the spring force is smaller, the compression distance of the spring is larger as the spring wire is smaller, the compression distance is larger than the piston stroke, the gas circulation path is larger in the same way, and the effective time of gas spraying can be optimized.
3) The smaller the spring is, the smaller the corresponding shape of the pressure cap and the valve body matched with the spring is, thereby reducing the manufacturing cost.
4) Under the same condition, the spring wire is selected to be smaller, the spring compression distance is larger, the piston stroke is larger, the stress of the spring is flexible, and the valve sensitivity is relatively high.
5) As the selected springs are smaller, the pressing cap pressing springs are in pressing ring transition and are in contact with the ring surface of the pressing ring to play a role in reducing abrasion, the rotating pressing cap force of the pressing springs is lighter, and the assembly is more convenient.
6) The annular sealing ring is provided with bosses on two sides, the piston and the flow guiding nut assembled with the annular sealing ring are both provided with concave parts, and the concave part of the flow guiding nut is provided with a small hole.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment according to the present invention;
fig. 2 is an enlarged view of a preferred embodiment according to the present invention, shown at a in fig. 1.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.
As shown in fig. 1 and 2, the preferred embodiment of the present invention comprises a valve body 1, a pressing cap 2 is fixedly arranged at the upper end of the valve body 1, a spring 3, a spring seat 4, a pressing cover 5 and a piston 6 are sequentially arranged in the valve body 1 from top to bottom, a joint 7 is fixedly arranged at the lower end of the valve body 1, an air inlet channel 71 is arranged on the joint 7, an air outlet channel 11 is arranged at the side surface of the valve body 1, and the piston 6 moves up and down and is used for communicating or closing the air inlet channel 71 and the air outlet channel 11; the key points are as follows:
a valve channel 12 is arranged between the air inlet channel 71 and the air outlet channel 11, the valve channel 12 is arranged along the up-down direction, the lower end of the piston 6 is provided with an annular sealing ring 8, and when the piston 6 moves upwards, the annular sealing ring 8 props against the inner wall of the valve channel 12 for sealing; an air chamber 51 is formed between the gland 5 and the piston 6, and a small vent hole 61 is formed in the piston 6 and communicates the air chamber 51 with an air inlet passage 71. The lower end of the piston 6 is provided with a diversion nut 9, and the annular sealing ring 8 is tightly pressed and fixed between the piston 6 and the diversion nut 9; a flow guide small hole 91 is formed in the flow guide nut 9, and the flow guide small hole 91 is communicated with the small vent hole 61; bosses extend from the upper surface and the lower surface of the annular sealing ring 8, and corresponding concave parts are arranged on the piston 6 and the diversion nut 9; the concave part of the diversion nut 9 is provided with a small release hole 92, and the small release hole 92 is communicated with the annular sealing ring 8 and the air inlet channel 71.
In order to reduce friction, a pressure ring 10 is arranged between the pressure cap 2 and the spring 3.
It should be noted that, for the requirement of valve tightness, there are a plurality of sealing rings in this embodiment, and these seals are all shown in the drawings, but because their structures and sealing manners are all the prior art, they are not specifically described in the specification, but this does not prevent them from becoming the technical features implicit in the present invention, and thus the description is given here.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A pressure reducing and stabilizing valve comprises a valve body, wherein a pressing cap is fixedly arranged at the upper end of the valve body, a spring seat, a pressing cover and a piston are sequentially arranged in the valve body from top to bottom, a joint is fixedly arranged at the lower end of the valve body, an air inlet channel is formed in the joint, an air outlet channel is formed in the side surface of the valve body, and the piston moves up and down and is used for communicating or closing the air inlet channel and the air outlet channel; the method is characterized in that:
a valve channel is arranged between the air inlet channel and the air outlet channel, the valve channel is arranged along the vertical direction, an annular sealing ring is arranged at the lower end of the piston, and when the piston moves upwards, the annular sealing ring is abutted against the inner wall of the valve channel for sealing;
an air chamber is formed between the gland and the piston, a small vent hole is formed in the piston, and the small vent hole is communicated with the air chamber and the air inlet channel.
2. A pressure reducing and maintaining valve as defined in claim 1, wherein: the lower end of the piston is provided with a flow guide nut, and the annular sealing ring is tightly pressed and fixed between the piston and the flow guide nut; a flow guide small hole is formed in the flow guide nut and communicated with the small vent hole;
bosses extend from the upper surface and the lower surface of the annular sealing ring, and corresponding concave parts are arranged on the piston and the diversion nut; and a release small hole is formed in the concave part of the flow guide nut and is communicated with the annular sealing ring and the air inlet channel.
3. A pressure reducing and maintaining valve as defined in claim 2, wherein: and a compression ring is arranged between the compression cap and the spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020508175.4U CN212719192U (en) | 2020-04-09 | 2020-04-09 | Pressure reducing and stabilizing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020508175.4U CN212719192U (en) | 2020-04-09 | 2020-04-09 | Pressure reducing and stabilizing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212719192U true CN212719192U (en) | 2021-03-16 |
Family
ID=74905500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020508175.4U Expired - Fee Related CN212719192U (en) | 2020-04-09 | 2020-04-09 | Pressure reducing and stabilizing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212719192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932008A (en) * | 2021-10-21 | 2022-01-14 | 贺尔碧格传动技术(常州)有限公司 | Pressure stabilizer of pneumatic gear shifting booster |
-
2020
- 2020-04-09 CN CN202020508175.4U patent/CN212719192U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932008A (en) * | 2021-10-21 | 2022-01-14 | 贺尔碧格传动技术(常州)有限公司 | Pressure stabilizer of pneumatic gear shifting booster |
| CN113932008B (en) * | 2021-10-21 | 2022-11-11 | 贺尔碧格传动技术(常州)有限公司 | Pressure stabilizer of pneumatic gear shifting booster |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210316 |