CN108593188B - Pressure sensing system - Google Patents
Pressure sensing system Download PDFInfo
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- CN108593188B CN108593188B CN201810281208.3A CN201810281208A CN108593188B CN 108593188 B CN108593188 B CN 108593188B CN 201810281208 A CN201810281208 A CN 201810281208A CN 108593188 B CN108593188 B CN 108593188B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
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Abstract
The invention provides a pressure sensing system, and belongs to the field of hydraulic pressure sensing. The invention relates to a pressure sensing system which comprises a low-pressure high-precision pressure measuring unit, a high-pressure low-precision pressure measuring unit, a flow channel switching control valve and a measured liquid introducing unit, wherein the low-pressure safety protection unit is communicated with the low-pressure high-precision pressure measuring unit, the flow channel switching control valve is arranged on a flow channel between the low-pressure high-precision pressure measuring unit and the high-pressure measuring unit, and the high-pressure measuring unit and the flow channel switching control valve are connected with the measured liquid introducing unit. The pressure sensing system is characterized in that the high-pressure cavity of the high-pressure low-precision pressure measuring unit is communicated with the low-pressure cavity of the low-pressure high-precision pressure measuring unit through the flow channel switching control valve, and the low-pressure cavity of the low-pressure high-precision pressure measuring unit is communicated with the flow channel switching control valve.
Description
Technical Field
The invention relates to a pressure sensing system, and belongs to the field of hydraulic pressure sensing.
Background
At present, most of domestic and foreign pressure sensing systems are pressure sensing systems using single pressure sensors or pressure sensors directly meeting requirements are selected, so that the pressure sensing systems are small in error, simple in structure and easy to manufacture; however, such a structure is affected by the limitations of the pressure sensor, and often a trade-off is made between the measurement range and the accuracy, and the adopted pressure sensor is generally precise and expensive in cost, and the pressure sensor which meets both the measurement range with a sufficient size and the accuracy with a sufficient size cannot be found.
Disclosure of Invention
The present invention is directed to solve the above problems of the prior art, and to provide a pressure sensing system.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a pressure sensing system, pressure sensing system includes low pressure high accuracy pressure measurement unit, high pressure low accuracy pressure measurement unit, runner switching control valve and measures liquid and introduce the unit, low pressure safety protection unit communicates with each other with low pressure high accuracy pressure measurement unit, and runner switching control valve installs on the runner between low pressure high accuracy pressure measurement unit and the high pressure measurement unit, and high pressure measurement unit and runner switching control valve are connected with the measuring liquid and are introduced the unit.
The low-pressure high-precision pressure measuring unit comprises a low-pressure high-precision pressure sensor and a low-pressure cavity, wherein the low-pressure cavity is connected with the low-pressure high-precision pressure sensor and is connected with a flow channel switching control valve through a flow channel.
The invention relates to a pressure sensing system, wherein a high-pressure low-precision pressure measuring unit comprises a high-pressure low-precision pressure sensor and a high-pressure cavity, and the high-pressure cavity is connected with the high-pressure low-precision pressure sensor and is connected with a flow channel switching control valve and a measuring liquid introducing unit through a flow channel.
The invention relates to a pressure sensing system, wherein a flow channel switching control valve comprises a movable control valve core and a flow channel switching control cavity, the movable control valve core is driven by pressure, and the movable control valve core is made of 40 Cr.
The invention relates to a pressure sensing system.A movable control valve core comprises a spring telescopic mechanism which is controlled by pressure to open and close.
The invention relates to a pressure sensing system.A movable control valve core is provided with a flow channel opening and closing switching unit.
According to the pressure sensing system, the whole valve block of the flow channel switching control valve is made of No. 45 steel.
The invention relates to a pressure sensing system, wherein the measuring range of a low-pressure high-precision pressure sensor is 1.6 MPa.
According to the pressure sensing system, the measuring range of the high-pressure low-precision pressure sensor is 10 MPa.
The invention discloses a pressure sensing system, which aims to solve the problem that the range and the precision of the pressure sensing system are limited due to the use of a single pressure sensor in the prior art, improve the quality of the pressure sensing system, improve the range of pressure measurement on the premise of ensuring the percentage precision, introduce the measured liquid into the pressure sensing system through a measured liquid introduction unit, and respectively introduce the measured liquid into a high-pressure cavity of a high-pressure low-precision pressure measurement unit and a low-pressure cavity of a low-pressure high-precision pressure measurement unit by using a flow channel switching control valve according to the range of the liquid pressure so as to measure the pressure of the measured liquid.
Drawings
FIG. 1 is a block diagram of a pressure sensing system of the present invention.
Fig. 2 is a perspective view of a pressure sensing system of the present invention.
Fig. 3 is a top view of a pressure sensing system of the present invention.
Fig. 4 is a cross-sectional view of a-a' of fig. 3.
Fig. 5 is a schematic structural view of a flow passage switching control valve.
The reference numeral 1 in the figure is a low-pressure high-precision pressure measuring unit; 2 is a high-pressure low-precision pressure measuring unit; 3 is a flow passage switching control valve; 4 is a measuring liquid introducing unit; 1-2 is a low-pressure cavity; 2-2 is a high-pressure cavity; 3-1 is a movable control valve core; and 3-2 is a flow channel switching control cavity.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.
The first embodiment is as follows: as shown in fig. 1 to 5, the pressure sensing system according to this embodiment includes a low-pressure high-precision pressure measuring unit, a high-pressure low-precision pressure measuring unit, a flow channel switching control valve, and a measurement liquid introducing unit, the low-pressure safety protecting unit is communicated with the low-pressure high-precision pressure measuring unit, the flow channel switching control valve is installed on a flow channel between the low-pressure high-precision pressure measuring unit and the high-pressure measuring unit, and the high-pressure measuring unit and the flow channel switching control valve are connected to the measurement liquid introducing unit.
The invention introduces the measured liquid through the measuring liquid introducing unit, connects the high-precision small-range pressure sensor on the low-pressure cavity of an integrated valve block, connects the low-precision large-range pressure sensor on the high-pressure cavity, uses the hydraulic valve block and the valve core to cooperate to use the flow direction of the switching flow channel, switches the working cavity through the flow channel switching control valve to ensure that the low-pressure high-precision pressure measuring unit and the high-pressure low-precision pressure measuring unit respectively exert the advantages of the pressure sensors, uses different pressure sensors in different pressure intervals, uses the low-pressure cavity small-range pressure sensor to work and measure more accurate liquid pressure within the range of the small-range pressure sensor, seals the low-pressure cavity when exceeding the range of the small-range pressure sensor and uses the high-pressure cavity low-precision large-range pressure sensor to measure the liquid pressure when exceeding the range of the small-range pressure sensor, and integrates the advantages of the common small-range high-precision, the quality of the pressure sensing system is improved.
Example two: as shown in fig. 2 and 4, in the pressure sensing system according to this embodiment, the low-pressure high-precision pressure measuring unit includes a low-pressure high-precision pressure sensor and a low-pressure cavity, and the low-pressure cavity is connected to the low-pressure high-precision pressure sensor and connected to the flow channel switching control valve through the flow channel.
The small-range high-precision pressure sensor in the low-pressure high-precision pressure measuring unit can provide more accurate pressure when the pressure is small, and the percentage error of a pressure sensing system is reduced.
Example three: as shown in fig. 2 and 3, in the pressure sensing system according to this embodiment, the high-pressure low-precision pressure measuring unit includes a high-pressure low-precision pressure sensor and a high-pressure cavity, and the high-pressure cavity is connected to the high-pressure low-precision pressure sensor, and is connected to the flow channel switching control valve and the measurement liquid introducing unit through the flow channel.
The wide-range low-precision pressure sensor in the high-pressure low-precision pressure measuring unit improves the range of the pressure sensing system.
Example four: as shown in fig. 2 and 3, in the pressure sensing system according to the present embodiment, the flow channel switching control valve includes a movable control valve element and a flow channel switching control cavity, the movable control valve element is driven by pressure, and the material of the movable control valve element is 40 Cr.
The valve core is made of 40Cr, steps are turned out by using a lathe, and the sealing position is polished. The valve core is provided with a spring.
Example five: as shown in fig. 2, in the pressure sensing system according to the present embodiment, the movable control valve body includes a spring expansion mechanism that is opened and closed by pressure control.
Example six: as shown in fig. 2 and 3, in the pressure sensing system according to the present embodiment, the flow passage opening/closing switching unit is attached to the movable control valve body.
The working principle of the movable control valve core is that the flow channel switching control cavity in the initial state is communicated left and right, the low-pressure high-precision pressure measuring unit can measure the pressure of the measured liquid, when the pressure is gradually increased, but the pressure acting areas of the left and right sides of the movable control valve core are different, so that the valve core moves left, the spring is compressed, when the pressure reaches the subarea pressure, the low-pressure high-precision pressure measuring unit is closed on the left side of the valve core and is disconnected with the measured liquid, and at the moment, the measuring parameters of the high-pressure low-precision pressure measuring.
Example seven: as shown in fig. 3, in the pressure sensing system according to the present embodiment, the material of the entire valve block of the flow path switching control valve is 45 steel.
The valve block is made of No. 45 steel, a drilling machine is used for rough drilling, fine drilling and fine reaming inside the valve block, a milling machine is used for rough milling and fine milling outside the valve block, and a grinding machine is used for fine grinding.
Example eight: as shown in fig. 3, in the pressure sensing system according to the present embodiment, the measuring range of the low-pressure high-precision pressure sensor is 1.6 MPa.
Example nine: as shown in fig. 3, in the pressure sensing system according to the present embodiment, the high-pressure low-precision pressure sensor has a measuring range of 10 MPa.
The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A pressure sensing system is characterized by comprising a low-pressure high-precision pressure measuring unit (1), a high-pressure low-precision pressure measuring unit (2), a flow channel switching control valve (3) and a measuring liquid introducing unit (4), wherein the low-pressure safety protecting unit (4) is communicated with the low-pressure high-precision pressure measuring unit (1), the flow channel switching control valve (3) is arranged on a flow channel between the low-pressure high-precision pressure measuring unit (1) and the high-pressure measuring unit (2), and the high-pressure measuring unit (2) and the flow channel switching control valve (3) are connected with the measuring liquid introducing unit (4);
the flow channel switching control valve (3) comprises a movable control valve core (3-1) and a flow channel switching control cavity (3-2), the movable control valve core (3-1) is driven by pressure, the movable control valve core (3-1) is made of 40Cr, the movable control valve core (3-1) comprises a spring telescopic mechanism for controlling opening and closing by pressure, and a flow channel opening and closing switching unit is installed on the movable control valve core (3-1);
the working principle of the movable control valve core (3-1) is that the flow channel switching control cavity (3-2) is communicated left and right in the initial state, the low-pressure high-precision pressure measuring unit (1) can measure the pressure of the measured liquid, when the pressure is gradually increased, but the left and right pressure action areas of the movable control valve core (3-1) are different, the valve core moves left, the spring is compressed, when the pressure reaches the subarea pressure, the low-pressure high-precision pressure measuring unit (1) is closed on the left side of the valve core and disconnected with the measured liquid, and at the moment, the measuring parameters of the high-pressure low-precision pressure measuring unit (2) are selected.
2. The pressure sensing system according to claim 1, characterized in that the low-pressure high-precision pressure measuring unit (1) comprises a low-pressure high-precision pressure sensor and a low-pressure chamber (1-2), and the low-pressure chamber (1-2) is connected with the low-pressure high-precision pressure sensor and is connected with the flow passage switching control valve (3) through a flow passage.
3. The pressure sensing system according to claim 1, wherein the high-pressure low-precision pressure measuring unit (2) comprises a high-pressure low-precision pressure sensor and a high-pressure chamber (2-2), and the high-pressure chamber (2-2) is connected with the high-pressure low-precision pressure sensor and is connected with the flow channel switching control valve (3) and the measuring liquid introducing unit (4) through flow channels.
4. Pressure sensing system according to claim 1, characterized in that the material of the whole valve block of the flow channel switching control valve (3) is 45 steel.
5. The pressure sensing system of claim 2, wherein the low pressure high accuracy pressure sensor has a span of 1.6 MPa.
6. The pressure sensing system of claim 3, wherein the high pressure low accuracy pressure sensor has a span of 10 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810281208.3A CN108593188B (en) | 2018-04-02 | 2018-04-02 | Pressure sensing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810281208.3A CN108593188B (en) | 2018-04-02 | 2018-04-02 | Pressure sensing system |
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| CN108593188A CN108593188A (en) | 2018-09-28 |
| CN108593188B true CN108593188B (en) | 2020-06-12 |
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| CN201810281208.3A Active CN108593188B (en) | 2018-04-02 | 2018-04-02 | Pressure sensing system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109489900A (en) * | 2018-11-08 | 2019-03-19 | 上海华力微电子有限公司 | Implanter vacuum meter damages control device and the method for answering a pager's call of answering a pager's call |
| CN112268653A (en) * | 2020-11-09 | 2021-01-26 | 南京深度系统工程有限公司 | Pressure measuring device and method for time division multiple access |
| CN117388445B (en) * | 2023-12-12 | 2024-04-05 | 山东省计量科学研究院 | Atmospheric environment monitoring system |
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| JPH04309830A (en) * | 1991-04-05 | 1992-11-02 | Komatsu Ltd | Automatic pressure range selecting device for oil pressure measuring gauge |
| CN102506196A (en) * | 2011-10-24 | 2012-06-20 | 浙江盾安禾田金属有限公司 | Self-operated three-way valve |
| CN102927316A (en) * | 2011-08-11 | 2013-02-13 | 上海梅山钢铁股份有限公司 | Self-operated pressure range switching device |
| CN105805087A (en) * | 2016-05-09 | 2016-07-27 | 中国重型机械研究院股份公司 | Multistage-pressure automatic switching detection device |
| CN206816576U (en) * | 2017-03-25 | 2017-12-29 | 南京榆液液压有限公司 | Switch the switching valve system of high-low pressure meter |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59117965A (en) * | 1982-12-24 | 1984-07-07 | Hitachi Ltd | Four-way switching valve |
| CN201554899U (en) * | 2009-11-30 | 2010-08-18 | 清华大学 | Self-operated three-way change valve |
| CN101922990B (en) * | 2010-07-13 | 2011-08-24 | 上海大田阀门管道工程有限公司 | Self-operated micropressure controller |
| CN202629286U (en) * | 2012-06-13 | 2012-12-26 | 山推工程机械股份有限公司 | Change-over valve |
| CN205383436U (en) * | 2016-02-18 | 2016-07-13 | 许昌禹龙发电有限责任公司 | Wide range high accuracy pressure indicating system |
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2018
- 2018-04-02 CN CN201810281208.3A patent/CN108593188B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04309830A (en) * | 1991-04-05 | 1992-11-02 | Komatsu Ltd | Automatic pressure range selecting device for oil pressure measuring gauge |
| CN102927316A (en) * | 2011-08-11 | 2013-02-13 | 上海梅山钢铁股份有限公司 | Self-operated pressure range switching device |
| CN102506196A (en) * | 2011-10-24 | 2012-06-20 | 浙江盾安禾田金属有限公司 | Self-operated three-way valve |
| CN105805087A (en) * | 2016-05-09 | 2016-07-27 | 中国重型机械研究院股份公司 | Multistage-pressure automatic switching detection device |
| CN206816576U (en) * | 2017-03-25 | 2017-12-29 | 南京榆液液压有限公司 | Switch the switching valve system of high-low pressure meter |
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| CN108593188A (en) | 2018-09-28 |
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