CN202176756U - Self-operated type pressure-range automatic switching valve - Google Patents
Self-operated type pressure-range automatic switching valve Download PDFInfo
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- CN202176756U CN202176756U CN2011202211028U CN201120221102U CN202176756U CN 202176756 U CN202176756 U CN 202176756U CN 2011202211028 U CN2011202211028 U CN 2011202211028U CN 201120221102 U CN201120221102 U CN 201120221102U CN 202176756 U CN202176756 U CN 202176756U
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Abstract
The utility model provides a self-operated type pressure-range automatic switching valve, which comprises a valve body and a piston. The valve body is equipped with a gas inlet, a low pressure gas outlet, a high pressure gas outlet, and a pressure channel leading to the rear end of the piston from the air inlet. The gas inlet, the low pressure gas outlet, the high pressure gas outlet and the pressure channel are respectively connected with the cavity of the valve body. The front end of the piston is provided with a spring. One end of the spring is kept stationary relative to the valve body and the other end of the spring abuts against the front end of the piston. The piston is equipped with a first sealing ring and a second sealing ring used for blocking the low pressure gas outlet and the high pressure gas outlet respectively. The piston has two state positions. When low pressure gas is let in through the gas inlet, the piston is placed at the first state position. The high pressure gas outlet is sealed and the gas inlet is communicated with the low pressure gas outlet. When high pressure gas is let in through the gas inlet, the piston is placed at the second state position. The low pressure gas outlet is sealed and the gas inlet is communicated with the high pressure gas outlet. Whether the different-range measuring channels of a pressure gauge are communicated with each other or not is controlled through the compressed movement of the piston. Therefore, the pressure measurement of two different ranges can be realized. Meanwhile, the damage of the high pressure to a low-range pressure gauge during the reverse purging process is also avoided.
Description
Technical field
The utility model relates to the improvement to the conventional mounting type of pressure-display instrument in the different range pressure measurement process systems.Realize that the high low pressure range automaticallyes switch the not impaired a kind of self-powering type protective function of pressure gauge.
Background technique
In industrial factories and miness, need carry out the pressure parameter measurement that the blowback field sweep closes, be installed in like the pressure gauge on the pipelines such as oxygen, coal gas, flue dust, on nominal situation, the pressure of measuring on these pipelines is less usually, generally selects the pressure gauge of lower range for use; In case when fault or system were stopped, put into operation etc., the high pressure inert gas or the pressurized air that need several times even number to decuple nominal situation pressure carry out blowback to pipeline to be swept, and drives poisonous and harmful or flammable explosive gas in the pipeline away.The high pressure of this moment very easily washes out the pressure gauge of lower range; The maintainer uses the pressure gauge of wide range for preventing that pressure gauge from being washed out, the degree of accuracy of measurement parameter when having had a strong impact on nominal situation.Therefore press for the adaptive switched device of a kind of self-powering type pressure range, solve this ubiquitous problem.
The model utility content
The utility model wants the technical solution problem to be: to the defective of above-mentioned existing technology; A kind of self-powering type pressure range automatic transfer valve is proposed; It moves the gauge measurement passage of getting through or closing different ranges through the piston pressurized; Reach the pressure measurement of two kinds of different ranges, prevent that high pressure was to the manometric damage of lower range when blowback from sweeping.
In order to solve above technical problem, the self-powering type pressure range automatic transfer valve of the utility model is characterized in that: comprise valve body with column chamber, can be in the column chamber piston in axial sliding; Said valve body offers suction port, low pressure air outlet, the high pressure air outlet that is connected with valve chamber respectively, and said valve body also offers the pressure channel that leads to piston rear end from suction port, and said piston nose is provided with spring; It is static that one end of spring and valve body keep, and the other end of spring props up the front end of piston, and piston is provided with and is respectively applied for first seal ring, second seal ring that intercepts low pressure air outlet and high pressure air outlet; Said piston has two mode bits, and when suction port fed low-pressure gas, piston was in first mode bit; Spring-relaxation; The high pressure air outlet is sealed by second seal ring, and suction port and the conducting of low pressure air outlet are when suction port feeds pressurized gas; Piston is in second mode bit; Length of spring compressed, the low pressure air outlet is sealed by first seal ring, suction port and the conducting of high pressure air outlet.
Further; In this self-powering type pressure range automatic transfer valve, said valve body also offers the exhaust passage that is connected with valve chamber, and piston is provided with the 3rd seal ring that is used to intercept the exhaust passage; When piston is in first mode bit; The exhaust passage is closed, when piston is in second mode bit, and exhaust passage and the conducting of low pressure air outlet.
Further, also having on the said valve body can be along the adjustment screw of the axial adjustment of valve chamber, and the fixed end of said spring props up the inner of adjustment screw, and the adjustment screw is fixed on the valve body through caging bolt.
The adaptive switched principle of the utility model pressure range is following:
The power F=P*S that the piston cross section is suffered
P: measuring channel pressure (suction port)
S: piston cross sectional area
Make the piston power of (being length of spring compressed): the Fy=K*L+F1+Fo that moves right
K: spring constant
L: the distance of length of spring compressed or stretching, extension
F1: initial tension of spring
Fo: the frictional force of piston and tube wall
Make piston be moved to the left the power of (being that spring stretches): Fz=K*L+F1-Fo
Have above formula to know, as S, K, L, F1, when Fo is a constant, the power that piston is moved is to be determined by the pressure P in the measuring channel.Initial tension of spring F1 can be adjusted by the screw of adjusting.
Under nominal situation; Because the tested pressure ratio in the process pipe is lower; The suffered power F＜Fy of piston at this moment, piston can not move, and the pressure in the tested pipeline is measured through sounding pipe passage (suction port) and the pressure gauge that connects the manometric low pressure of lower range air outlet entering lower range; This moment show under the nominal situation by measuring pressure; Because the seal action of second seal ring makes exhaust port passage (suction port) and connects the sealing of the manometric high pressure of high range air outlet, thereby makes the lower range pressure gauge accurately measure the measured medium pressure under the nominal situation.Stop in fault or system, when putting into operation, the high pressure inert gas or the pressurized air that need several times even number to decuple nominal situation pressure carry out blowback to process pipe and sweep power F＞Fy that piston is suffered; The elastic force that piston overcomes spring moves forward; Make the sealing of first seal ring connect the manometric low pressure of lower range air outlet, the 3rd seal ring moves, and makes low pressure air outlet and exhaust passage conducting; Pressure in the emptying lower range pressure gauge, protection lower range pressure gauge; Mobile high range pressure gauge passage (high pressure air outlet) and suction port conducting, the high pressure that high range pressure gauge demonstration blowback is swept of making of second seal ring.End is swept in blowback, and high pressure disappears, and this moment is at the suffered power F of piston＜Fz; Extensional process by initial tension of spring F1 and spring; Force piston to move backward, because the seal action of second seal ring and the 3rd seal ring makes the exhaust passage and connects the sealing of the manometric high pressure of high range air outlet; Make the pressure gauge and the tested pipeline UNICOM of lower range, thereby make the lower range pressure gauge accurately measure the measured medium pressure under the nominal situation.Initial tension of spring F1 can be adjusted by the screw of adjusting, and its value of adjusting can be manometric 3/4 range of lower range, and its setting valve is the range switching value, the manometric range of lower range may be selected to be under the nominal situation by two to three times of measuring pressure.
The innovative point of the utility model is:
1) different range pressure switch, and adopt self-powering type adaptive switched, need not to be equipped with other power sources;
2) the gauge measurement passage of different ranges is got through or closed to piston according to stressed situation, reaches two kinds of different range pressure and switch;
3) the range switching value is adjustable, makes it can be applied to the pressure occasion of different ranges neatly;
4) simple in structure, practical, easy to use, safe.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of the utility model self-powering type pressure range automatic transfer valve.
Embodiment
The self-powering type pressure range automatic transfer valve of present embodiment, as shown in Figure 1, its composition comprise valve body 13 with column chamber 14, can be in column chamber 14 piston 6 in axial sliding; Valve body 13 offers suction port 4, low pressure air outlet 11, the high pressure air outlet 10 that is connected with valve chamber 14 respectively, and valve body 13 also offers the pressure channel 1 that leads to piston 6 rear ends from suction port 4, and piston 6 front ends are provided with spring 9; One end of spring 9 and valve body 13 keeps static, and the other end of spring 9 props up the front end of piston 6, and piston 6 is provided with and is respectively applied for first seal ring 3, second seal ring 5 that intercepts low pressure air outlet 11 and high pressure air outlet 10; Piston 6 has two mode bits, and when suction port 4 fed low-pressure gas, piston 6 was in first mode bit; Spring 9 diastoles; High pressure air outlet 10 is by 5 sealings of second seal ring, and suction port 4 and 11 conductings of low pressure air outlet are when suction port 4 feeds pressurized gas; Piston 6 is in second mode bit; Spring 9 compressions, low pressure air outlet 11 is by 3 sealings of first seal ring, suction port 4 and 10 conductings of high pressure air outlet.
Valve body 6 also offers the exhaust passage 12 that is connected with valve chamber 14; Piston 6 is provided with the 3rd seal ring 2 that is used to intercept exhaust passage 1, and when piston 6 was in first mode bit, exhaust passage 1 was closed; When piston 6 is in second mode bit, exhaust passage 1 and 11 conductings of low pressure air outlet.Also having on the valve body 13 can be along the adjustment screw 8 of valve chamber's 14 axial adjustment, and the fixed end of spring 9 props up the inner of adjustment screw 8; Adjustment screw 8 is fixed on the valve body through caging bolt 7.
This valve is installed between measuring channel and the pressure gauge, and suction port 4 is screwed on the tested process pipe, and the lower range pressure gauge under the nominal situation is screwed on the low pressure air outlet 11, and the high range pressure gauge was screwed on the high pressure air outlet 10 when blowback was swept.Caging bolt 7 has been confirmed the distance that piston 6 moves, the i.e. distance of length of spring compressed or stretching, extension.Initial tension of spring F1 can be adjusted by the screw 8 of adjusting, and its value of adjusting can be manometric 3/4 range of lower range, and its setting valve is the range switching value, the manometric range of lower range may be selected to be under the nominal situation by two to three times of measuring pressure.
In sum, this valve arrangement is novel, simple.It is the adaptive switched device of the reasonable self-powering type pressure of present applicability range.It is rapid, accurate that it can make the amount of pressure journey switch, and prevents that high pressure improved manometric working life to the manometric damage of lower range when blowback from sweeping, and reduces maintenance expenses and repair density.
Except that the foregoing description, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (4)
1. self-powering type pressure range automatic transfer valve is characterized in that: comprise valve body with column chamber, can be in the column chamber piston in axial sliding, said valve body offers suction port, low pressure air outlet, the high pressure air outlet that is connected with valve chamber respectively; Said valve body also offers the pressure channel that leads to piston rear end from suction port, and said piston nose is provided with spring, and it is static that an end of spring and valve body keep; The other end of spring props up the front end of piston, and piston is provided with and is respectively applied for first seal ring, second seal ring that intercepts low pressure air outlet and high pressure air outlet, and said piston has two mode bits; When suction port fed low-pressure gas, piston was in first mode bit, spring-relaxation; The high pressure air outlet is sealed by second seal ring, and suction port and the conducting of low pressure air outlet are when suction port feeds pressurized gas; Piston is in second mode bit; Length of spring compressed, the low pressure air outlet is sealed by first seal ring, suction port and the conducting of high pressure air outlet.
2. according to the said self-powering type pressure of claim 1 range automatic transfer valve; It is characterized in that: said valve body also offers the exhaust passage that is connected with valve chamber; Piston is provided with the 3rd seal ring that is used to intercept the exhaust passage, and when piston was in first mode bit, the exhaust passage was closed; When piston is in second mode bit, exhaust passage and the conducting of low pressure air outlet.
3. according to claim 1 or 2 said self-powering type pressure range automatic transfer valves, it is characterized in that: also having on the valve body can be along the adjustment screw of the axial adjustment of valve chamber, and the fixed end of said spring props up the inner of adjustment screw.
4. according to the said self-powering type pressure of claim 3 range automatic transfer valve, it is characterized in that: the adjustment screw is fixed on the valve body through caging bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202211028U CN202176756U (en) | 2011-06-28 | 2011-06-28 | Self-operated type pressure-range automatic switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202211028U CN202176756U (en) | 2011-06-28 | 2011-06-28 | Self-operated type pressure-range automatic switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176756U true CN202176756U (en) | 2012-03-28 |
Family
ID=45866634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202211028U Expired - Fee Related CN202176756U (en) | 2011-06-28 | 2011-06-28 | Self-operated type pressure-range automatic switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176756U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728420A (en) * | 2013-12-30 | 2014-04-16 | 聚光科技(杭州)股份有限公司 | Online monitoring method for gas inside pipeline |
| CN105697456A (en) * | 2014-11-27 | 2016-06-22 | 无锡市海骏液压机电设备有限公司 | Adjustment type hydraulic cylinder pressure measurement device |
| CN107120194A (en) * | 2017-05-25 | 2017-09-01 | 上海泛智能源装备有限公司 | A kind of fuel self-adjusted block device and gas furnace turbine |
| CN107607251A (en) * | 2017-09-08 | 2018-01-19 | 上海工业自动化仪表研究院有限公司 | A kind of differential pressure or pressure transmitter with double-range |
| CN108041888A (en) * | 2017-11-30 | 2018-05-18 | 重庆市长寿区美全家具有限公司 | Intelligent temperature control furniture bedstead |
| CN113203517A (en) * | 2021-04-26 | 2021-08-03 | 上海冉能自动化科技有限公司 | Air pressure detection method |
| CN114659699A (en) * | 2022-02-14 | 2022-06-24 | 广东清泉建设工程有限公司 | Quick water pressure check out test set of running water |
| CN114878036A (en) * | 2022-01-25 | 2022-08-09 | 许先洪 | Intelligent pressure sensor with automatic pressure relief function |
-
2011
- 2011-06-28 CN CN2011202211028U patent/CN202176756U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728420A (en) * | 2013-12-30 | 2014-04-16 | 聚光科技(杭州)股份有限公司 | Online monitoring method for gas inside pipeline |
| CN105697456A (en) * | 2014-11-27 | 2016-06-22 | 无锡市海骏液压机电设备有限公司 | Adjustment type hydraulic cylinder pressure measurement device |
| CN107120194A (en) * | 2017-05-25 | 2017-09-01 | 上海泛智能源装备有限公司 | A kind of fuel self-adjusted block device and gas furnace turbine |
| CN107120194B (en) * | 2017-05-25 | 2023-08-18 | 新奥能源动力科技（上海）有限公司 | Fuel self-adaptive distribution device and gas turbine |
| CN107607251A (en) * | 2017-09-08 | 2018-01-19 | 上海工业自动化仪表研究院有限公司 | A kind of differential pressure or pressure transmitter with double-range |
| CN107607251B (en) * | 2017-09-08 | 2024-05-14 | 上海工业自动化仪表研究院有限公司 | Differential pressure or pressure transmitter with double measuring ranges |
| CN108041888A (en) * | 2017-11-30 | 2018-05-18 | 重庆市长寿区美全家具有限公司 | Intelligent temperature control furniture bedstead |
| CN113203517A (en) * | 2021-04-26 | 2021-08-03 | 上海冉能自动化科技有限公司 | Air pressure detection method |
| CN114878036A (en) * | 2022-01-25 | 2022-08-09 | 许先洪 | Intelligent pressure sensor with automatic pressure relief function |
| CN114878036B (en) * | 2022-01-25 | 2023-11-17 | 广东可银智能装备科技有限公司 | Intelligent pressure sensor with automatic pressure relief function |
| CN114659699A (en) * | 2022-02-14 | 2022-06-24 | 广东清泉建设工程有限公司 | Quick water pressure check out test set of running water |
| CN114659699B (en) * | 2022-02-14 | 2024-01-30 | 广东清泉建设工程有限公司 | Tap water rapid water pressure detection equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20120328 Termination date: 20190628 |