CN111141441B - Pressure transmitter - Google Patents
Pressure transmitter Download PDFInfo
- Publication number
- CN111141441B CN111141441B CN201811308437.6A CN201811308437A CN111141441B CN 111141441 B CN111141441 B CN 111141441B CN 201811308437 A CN201811308437 A CN 201811308437A CN 111141441 B CN111141441 B CN 111141441B
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- China
- Prior art keywords
- diaphragm
- pressure transmitter
- base
- pressure
- liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0042—Constructional details associated with semiconductive diaphragm sensors, e.g. etching, or constructional details of non-semiconductive diaphragms
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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
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0618—Overload protection
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a pressure transmitter which comprises a base, wherein a channel for measuring fluid is arranged in the base, a measuring diaphragm is arranged above the channel for measuring fluid, a cavity is arranged in the measuring diaphragm, sealing liquid is filled in the cavity and is connected with a sensing device at the bottom of a signal generator, an overpressure protection diaphragm is arranged below the channel for measuring fluid, a liquid storage chamber is arranged below the overpressure protection diaphragm, a safety diaphragm is arranged at the bottom end of the liquid storage chamber, liquid water is filled in the liquid storage chamber, and the overpressure protection diaphragm is pushed into an upwards-convex arc shape by the liquid water. The pressure transmitter provided by the invention has the advantages of simple integral structure, high precision, convenience in installation and maintenance and long service life.
Description
Technical Field
The invention belongs to the technical field of pressure measurement, and particularly relates to a pressure transmitter.
Background
A pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. It can convert the physical pressure parameters sensed by the load cell sensor into standard electric signals for the secondary instruments such as indicating alarm, recorder and regulator to measure, indicate and regulate the process. The pressure transmitter is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to various industries such as water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrochemical industry, oil wells, electric power, ships, machine tools, pipelines and the like. Among the prior art, pressure transmitter's protection device, all be when fluid pressure is too big, make the overvoltage protection diaphragm produce deformation, and then make measurement diaphragm and inside cavity coincidence, thereby prevent that sealed liquid can't be to the further transmission pressure of signal generator, and then protect signal generator, but this kind of setting, the great deformation takes place for the measurement diaphragm that can make, the price of general measurement diaphragm is expensive, take place the deformation back many times, can seriously influence its life, and when pressure is too big, pressure transmitter need be connected the back with alarm device, just can indicate operator's pressure too big, alarm device's setting, can increase the cost of equipment.
Disclosure of Invention
In order to solve the technical problem, the invention provides a pressure transmitter which can not extrude a measuring diaphragm when the pressure is overlarge.
The invention is realized by the following technical scheme.
The utility model provides a pressure transmitter, includes the base, the inside passageway that is provided with the measurement fluid of base, the passageway top of measuring the fluid is provided with the measurement diaphragm, be provided with the cavity in the measurement diaphragm, the cavity intussuseption is filled with sealed liquid, sealed liquid is connected with the sensing device of signal generator bottom, the passageway below of measuring the fluid is provided with the overvoltage protection diaphragm, overvoltage protection diaphragm below is provided with the stock solution room, the bottom of stock solution room is provided with insurance diaphragm, the stock solution room is inside to be filled there is liquid water, liquid water pushes up the overvoltage protection diaphragm and becomes upwards bellied circular-arc.
Specifically, the signal generator is a silicon micro-capacitance sensor, the silicon micro-capacitance sensor can convert a pressure signal into an electric signal, the electric signal is converted into a digital signal through an amplifying circuit, and finally the digital signal is sent to an upper computer through a wireless module.
Specifically, the safety diaphragm is connected to the bottom end of the base through a bolt.
According to the technical scheme, the beneficial effects of the invention are as follows:
the pressure transmitter provided by the invention has the advantages of simple integral structure, high precision, convenience in installation and maintenance and long service life. According to the pressure overload warning device, when the pressure of the measured fluid is too high, the overpressure protection film can deform downwards to squeeze liquid water, so that the volume in the fluid channel can be increased, the squeezing force of the measured fluid on the measuring diaphragm is reduced, meanwhile, the liquid water squeezes the safety diaphragm, the safety diaphragm is broken through, and the liquid water flows out, so that an operator can be timely reminded that the pressure transmitter is overloaded, and the safety diaphragm is connected to the bottom end of the base through the bolt, and is convenient to replace.
Drawings
Fig. 1 is a schematic structural view of a pressure transmitter according to embodiment 1 of the present invention;
reference numerals: the device comprises a base-1, a channel-2, a measuring diaphragm-3, sealing liquid-4, a signal generator-5, an overvoltage protection diaphragm-6, a liquid storage chamber-7, a safety diaphragm-8 and a bolt-9.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
The utility model provides a pressure transmitter, includes base 1, 1 inside passageway 2 that is provided with the measurement fluid of base, 2 tops of the passageway of measurement fluid are provided with measurement diaphragm 3, be provided with the cavity in the measurement diaphragm 3, the cavity intussuseption is filled with sealing liquid 4, sealing liquid 4 is connected with the sensing device of signal generator 5 bottoms, 2 belows in the passageway of measurement fluid are provided with overvoltage protection diaphragm 6, overvoltage protection diaphragm 6 below is provided with stock solution room 7, the bottom of stock solution room 7 is provided with insurance diaphragm 8, the inside packing of stock solution room 7 has liquid water, liquid water pushes up overvoltage protection diaphragm 6 and becomes upwards bellied circular-arc.
When the pressure is in a normal range during pressure testing, the overvoltage protection diaphragm cannot deform, when the pressure is too high, the overvoltage protection diaphragm deforms downwards to press water in the liquid storage chamber, the water transmits the pressure to the safety diaphragm, and after the safety diaphragm is stressed to a certain degree, the safety diaphragm can break, the water flows out, the pressure is released, and an operator is reminded of the phenomenon of too high pressure; after the safety diaphragm is damaged, the safety diaphragm is easy to replace, and the safety diaphragm is a low-cost resin synthetic diaphragm.
Specifically, the signal generator 5 is a silicon micro-capacitance sensor, and the silicon micro-capacitance sensor can convert a pressure signal into an electric signal, convert the electric signal into a digital signal through an amplifying circuit, and finally send the digital signal to an upper computer through a wireless module.
Specifically, the rupture disk 8 is attached to the bottom end of the base 1 by a bolt 9.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.
Claims (3)
1. The utility model provides a pressure transmitter, its characterized in that, includes the base, the inside passageway of measuring fluid that is provided with of base, the passageway top of measuring fluid is provided with measures the diaphragm, be provided with the cavity in the measurement diaphragm, the cavity intussuseption is filled with sealed liquid, sealed liquid is connected with the sensing device of signal generator bottom, the passageway below of measuring fluid is provided with the overvoltage protection diaphragm, overvoltage protection diaphragm below is provided with the stock solution room, the bottom of stock solution room is provided with insurance diaphragm, stock solution room inside is filled with liquid water, liquid water pushes up the overvoltage protection diaphragm and becomes convex circular-arc upwards.
2. The pressure transmitter of claim 1, wherein the signal generator is a silicon micro-capacitance sensor, and the silicon micro-capacitance sensor can convert a pressure signal into an electric signal, convert the electric signal into a digital signal through an amplifying circuit, and finally transmit the digital signal to the upper computer through a wireless module.
3. A pressure transmitter as claimed in claim 1, wherein the rupture disc is bolted to the bottom end of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811308437.6A CN111141441B (en) | 2018-11-05 | 2018-11-05 | Pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811308437.6A CN111141441B (en) | 2018-11-05 | 2018-11-05 | Pressure transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111141441A CN111141441A (en) | 2020-05-12 |
| CN111141441B true CN111141441B (en) | 2021-09-07 |
Family
ID=70516100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811308437.6A Active CN111141441B (en) | 2018-11-05 | 2018-11-05 | Pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111141441B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1839300A (en) * | 2003-08-20 | 2006-09-27 | 株式会社山武 | pressure sensing device |
| CN1938572A (en) * | 2004-04-07 | 2007-03-28 | 恩德莱斯和豪瑟尔两合公司 | Differential pressure sensor with dynamic overload protection |
| CN101553719A (en) * | 2006-11-22 | 2009-10-07 | 丹福斯有限公司 | A pressure sensor |
| CN102057265A (en) * | 2008-06-12 | 2011-05-11 | 罗斯蒙德公司 | Improved isolation system for process pressure measurement |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU614346A1 (en) * | 1977-01-03 | 1978-07-05 | Предприятие П/Я А-3759 | Pressure sensor |
| CN203809270U (en) * | 2014-03-26 | 2014-09-03 | 西安西热水务环保有限公司 | Novel double-membrane breaking alarming device for metering pump |
| US11237182B2 (en) * | 2016-02-19 | 2022-02-01 | Hitachi High-Tech Corporation | Automatic analyzer |
-
2018
- 2018-11-05 CN CN201811308437.6A patent/CN111141441B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1839300A (en) * | 2003-08-20 | 2006-09-27 | 株式会社山武 | pressure sensing device |
| CN1938572A (en) * | 2004-04-07 | 2007-03-28 | 恩德莱斯和豪瑟尔两合公司 | Differential pressure sensor with dynamic overload protection |
| CN101553719A (en) * | 2006-11-22 | 2009-10-07 | 丹福斯有限公司 | A pressure sensor |
| CN102057265A (en) * | 2008-06-12 | 2011-05-11 | 罗斯蒙德公司 | Improved isolation system for process pressure measurement |
Non-Patent Citations (1)
| Title |
|---|
| 硅微电容智能型变送器在化工生产中的应用;张腾，等;《河南化工》;20180831;第35卷(第8期);第53-54页 * |
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| Publication number | Publication date |
|---|---|
| CN111141441A (en) | 2020-05-12 |
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