CN212719194U - Pressure reducing piston valve - Google Patents
Pressure reducing piston valve Download PDFInfo
- Publication number
- CN212719194U CN212719194U CN202020513587.7U CN202020513587U CN212719194U CN 212719194 U CN212719194 U CN 212719194U CN 202020513587 U CN202020513587 U CN 202020513587U CN 212719194 U CN212719194 U CN 212719194U
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- CN
- China
- Prior art keywords
- piston
- valve body
- cavity
- valve
- piston rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 230000006837 decompression Effects 0.000 claims abstract description 7
- 210000004907 gland Anatomy 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 21
- 230000003139 buffering effect Effects 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model discloses a decompression piston valve, including pressing cap, valve body and sealed head, sealed head set up in valve body one end, press the cap set up in the valve body other end, press the inside logical extremely that is provided with of cap the inside cavity of valve body, the valve body inside still be provided with the air cavity that the cavity is connected, sealed overhead be provided with the air inlet passageway of air cavity intercommunication, valve body one side seted up with the gas outlet passageway of air cavity intercommunication, its characterized in that: the air inlet structure is characterized in that a piston assembly is arranged in the cavity and comprises a gland, a spring, a piston and a piston rod, the upper end of the piston rod is fixedly connected with the piston, the lower end of the piston rod extends into the air inlet channel, the air inlet channel is formed by inwards contracting the joint of the air cavity to form an air inlet, the piston rod is matched with the air inlet to form a valve which can be opened and closed, and the air inlet structure has the advantages of being not easy to deform in structure, stable in pressure and capable of guaranteeing effective time of air spraying.
Description
Technical Field
The utility model relates to a fire control gas technical field that puts out a fire, concretely relates to decompression piston valve.
Background
A piston pressure reducing valve is a device which can ensure that high-pressure gas (fire extinguishing agent) in a container is input into the pressure reducing valve, is output after pressure reduction and reaches a certain pressure or exceeds a set pressure value, and controls a valve under the action of spring force and the high-pressure gas.
Common relief pressure valve uses rubber packing pad as sealing tool, produces the problem that sealed contact surface warp easily after using for a long time, leads to the pressure of output to change, and can't rectify the pressure of output, and this kind of relief pressure valve equipment is comparatively inconvenient simultaneously, in order to guarantee gaseous flow area, the piston rod in the piston assembly can not be too big, but the piston rod of undersize takes place to warp the damage easily in violent action, influences the normal use of valve.
Therefore, it is a problem to be solved by those skilled in the art to improve and upgrade the existing pressure reducing valve to overcome the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a piston rod non-deformable, pressure stability just can guarantee the gaseous decompression piston valve of putting the effective time of spouting.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a decompression piston valve, is including pressing cap, valve body and sealed head, sealed head set up in valve body one end, press the cap set up in the valve body other end, press the inside cavity that leads to of cap inside the valve body, the valve body inside still be provided with the air cavity that the cavity is connected, be provided with on the sealed head with the air inlet passageway of air cavity intercommunication, valve body one side seted up with the gas outlet passageway of air cavity intercommunication, its characterized in that: be provided with piston assembly in the cavity, piston assembly includes gland, spring, piston and piston rod, set gradually from last to down in the cavity the gland the spring with the piston, the piston rod upper end with piston fixed connection, the piston rod lower extreme extends in the air inlet passageway, the air inlet passageway is in the junction of air cavity is to the internal contraction formation inlet port, the piston rod with the inlet port cooperation forms open and close valve, be provided with the sliding tray on the piston rod, be provided with annular block and rubber ring in the sliding tray, the annular block extends downwards has triangle-shaped joint piece, makes the annular block receives when the inlet port blocks to take place to slide, the rubber ring can be extruded and open to both sides.
As an improvement, the diameter of the outer ring of the annular block is larger than that of the air inlet, a buffering inclined plane is arranged at the joint of the air inlet and the air inlet channel, a clamping inclined plane matched with the buffering inclined plane is arranged on the outer side of the annular block, and the inclination angle of the clamping inclined plane is larger than that of the buffering inclined plane.
As an improvement, the top of the pressure cap is provided with an adjusting screw which penetrates through the top of the pressure cap to the pressure cover.
As an improvement, the bottom of the piston rod is detachably connected with a fixing head.
As an improvement, sealing strips are arranged between the pressing cap and the valve body, between the piston and the valve body, and between the sealing head and the valve body.
Compared with the prior art, the utility model has the advantages of: the decompression piston valve changes the original rubber sealing ring matching sealing structure into metal sealing, but the error exists in the part processing, so that the decompression piston valve cannot meet the good sealing requirement, therefore, the rubber sealing ring is additionally arranged for auxiliary sealing, and the movable annular block drives the rubber sealing ring to deform and expand to play a role of secondary sealing when the piston rod rises, thereby ensuring the sealing requirement, and because the position with the strongest stress is born by the metal annular block instead, the deformation in long-term use is reduced, although the deformation is reduced, the annular block is likely to be deformed and damaged during violent movement, so that the adjusting screw is arranged at the pressing cap, the pressure of the piston assembly can be finely adjusted to adapt to errors caused by the deformation, in addition, the bottom of the piston rod is fixed by a detachable fixing head, so that the piston rod is convenient to install and can be used for replacing the annular block or the rubber sealing ring when the annular block or the rubber sealing ring is damaged.
Drawings
Fig. 1 is a schematic overall structure diagram according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of the piston valve at a in fig. 1 when it is opened according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural view of the piston valve at a in fig. 1 when it is closed according to a preferred embodiment of the present invention.
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.
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 to 3, the utility model discloses a preferred embodiment includes pressing cap 1, valve body 2 and sealed head 3, sealed head 3 sets up in valve body 2 one end, press cap 1 to set up in the valve body 2 other end, press the inside cavity 4 that leads to inside of valve body 2 that is provided with of cap 1, a part of cavity 4 is in pressing cap 1, a part is in valve body 2, because piston assembly 8 is by cavity 4 joint, if cavity 4 integrated into one piece, can lead to the increase of the installation degree of difficulty, split type design has reduced the installation degree of difficulty, valve body 2 is inside still to be provided with the air cavity 5 of being connected with cavity 4, be provided with the air inlet channel 6 with air cavity 5 intercommunication on the sealed head 3, gas outlet channel 7 with air cavity 5 intercommunication is seted up to valve body 2 one side, be provided with piston assembly 8 in the cavity 4, piston assembly 8 includes gland 81, spring 82, piston 83 and piston rod 84, from last to setting gradually, The upper end of the piston rod 84 is fixedly connected with the piston 83, the lower end of the piston rod 84 extends into the air inlet channel 6, the air inlet channel 6 is inwardly contracted at the joint of the air cavity 5 to form an air inlet 31, the piston rod 84 is matched with the air inlet 31 to form an openable valve, a sliding groove 841 is arranged on the piston rod 84, an annular block 842 and a rubber ring 843 are arranged in the sliding groove 841, a triangular clamping block 844 extends downwards from the annular block 842, when the annular block 842 is blocked by the air inlet 31 to slide, the rubber ring 843 can be extruded to open towards two sides, primary sealing is firstly carried out through the movement of the annular block 842, then the rubber ring 843 is driven to deform and expand to play a role of secondary sealing when the piston rod 84 is lifted, the design can also reduce the possibility of deformation of the piston rod 84, the possibility of deformation of the piston rod 84 is smaller, the thinner the piston rod 84 can be designed, the fire extinguishing effect can be increased.
The diameter of ring 842 outer lane is greater than the diameter of inlet port 31, make ring 842 can be earlier than rubber circle 843 contact valve body 2, and take place to slide, make rubber circle 843 produce deformation, play secondary seal's effect, inlet port 31 is provided with buffering inclined plane 311 with the junction of air inlet passageway 6, the ring 842 outside is provided with the joint inclined plane 312 with buffering inclined plane 311 complex, the angle of inclination of joint inclined plane 312 is greater than the angle of inclination of buffering inclined plane 311, this structure can make the contact of ring 842 and inlet port 31 more moderate, reduce the oppression that produces during the violent movement, reduce the possibility of deformation, and can reduce machining error to a certain extent, increase sealed effect.
The top of the pressure cap 1 is provided with the adjusting screw 9, the adjusting screw 9 penetrates through the top of the pressure cap 1 to the gland 81, and although various structural designs are adopted to reduce the possibility of deformation of the piston rod 84, pressure errors are caused by various reasons according to the old probability in long-term use, and then the adjusting screw 9 can simply and effectively improve the problem.
The piston rod 84 bottom detachable is connected with fixed head 845, and the inconvenient installation of conventional piston rod 84 structural design, consequently changes detachable fixed head 845 into, both can easy to assemble, also can be used for the change when annular piece 842 or rubber ring 843 damage, extension product life.
All be provided with sealing strip 10 between pressure cap 1 and valve body 2, piston 83 and valve body 2, sealing head 3 and the valve body 2, can prevent that the tolerance between the spare part from leading to the product sealed degree not enough, increases the sealing capacity of whole valve, reduces the possibility of breaking down in the use.
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 (5)
1. The utility model provides a decompression piston valve, is including pressing cap, valve body and sealed head, sealed head set up in valve body one end, press the cap set up in the valve body other end, press the inside cavity that leads to of cap inside the valve body, the valve body inside still be provided with the air cavity that the cavity is connected, be provided with on the sealed head with the air inlet passageway of air cavity intercommunication, valve body one side seted up with the gas outlet passageway of air cavity intercommunication, its characterized in that: be provided with piston assembly in the cavity, piston assembly includes gland, spring, piston and piston rod, set gradually from last to down in the cavity the gland the spring with the piston, the piston rod upper end with piston fixed connection, the piston rod lower extreme extends in the air inlet passageway, the air inlet passageway is in the junction of air cavity is to the internal contraction formation inlet port, the piston rod with the inlet port cooperation forms open and close valve, be provided with the sliding tray on the piston rod, be provided with annular block and rubber ring in the sliding tray, the annular block extends downwards has triangle-shaped joint piece, makes the annular block receives when the inlet port blocks to take place to slide, the rubber ring can be extruded and open to both sides.
2. A pressure reducing piston valve as defined in claim 1, wherein: the inlet port with the junction of air inlet passageway is provided with the buffering inclined plane, the annular block outside be provided with buffering inclined plane complex joint inclined plane, the angle of inclination on joint inclined plane is greater than the angle of inclination on buffering inclined plane.
3. A pressure reducing piston valve as defined in claim 1, wherein: and an adjusting screw is arranged at the top of the pressing cap and penetrates through the top of the pressing cap to the pressing cover.
4. A pressure reducing piston valve as defined in claim 1, wherein: the bottom of the piston rod is detachably connected with a fixing head.
5. A pressure reducing piston valve as defined in claim 1, wherein: the pressure cap with the valve body, the piston with the valve body, the sealing head with all be provided with the sealing strip between the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513587.7U CN212719194U (en) | 2020-04-09 | 2020-04-09 | Pressure reducing piston valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020513587.7U CN212719194U (en) | 2020-04-09 | 2020-04-09 | Pressure reducing piston valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212719194U true CN212719194U (en) | 2021-03-16 |
Family
ID=74905435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020513587.7U Expired - Fee Related CN212719194U (en) | 2020-04-09 | 2020-04-09 | Pressure reducing piston valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212719194U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280137A (en) * | 2021-07-23 | 2021-08-20 | 山东泰恒智能环境科技有限公司 | Diaphragm type mud valve |
-
2020
- 2020-04-09 CN CN202020513587.7U patent/CN212719194U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280137A (en) * | 2021-07-23 | 2021-08-20 | 山东泰恒智能环境科技有限公司 | Diaphragm type mud valve |
| CN113280137B (en) * | 2021-07-23 | 2021-09-24 | 山东泰恒智能环境科技有限公司 | Diaphragm type mud valve |
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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 |
Granted publication date: 20210316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |