CN105547579A - Transmitter with explosion-proof function - Google Patents
Transmitter with explosion-proof function Download PDFInfo
- Publication number
- CN105547579A CN105547579A CN201510874890.3A CN201510874890A CN105547579A CN 105547579 A CN105547579 A CN 105547579A CN 201510874890 A CN201510874890 A CN 201510874890A CN 105547579 A CN105547579 A CN 105547579A
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- CN
- China
- Prior art keywords
- controller
- transmitter
- cavity
- electrically connected
- sensing element
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Classifications
-
- 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
- G01L19/0663—Flame protection; Flame barriers
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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
- G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
-
- 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
- G01L2019/0053—Pressure sensors associated with other sensors, e.g. for measuring acceleration, temperature
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention discloses a transmitter with an explosion-proof function. The transmitter comprises a housing, a pressure sensing element, an intermediate treatment unit, a controller, a combustible gas concentration sensor, a temperature sensor, a power supply module and a switching element. The housing is provided with a separation board which is used for divide the inner space of the housing into a first cavity and a second cavity, the intermediate treatment unit, the combustible gas concentration sensor, the temperature sensor, the switching element and the controller are arranged in the first cavity, and the pressure sensing element is located in the second cavity. The intermediate treatment unit is connected with the pressure sensing element; the controller is connected with the combustible gas concentration sensor and the temperature sensor; the switching element includes a power supply input end, a power supply output end and a control end; the power supply input end is connected with a power supply module; the power output end is connected with the controller; and the control end is connected with controller. The controller is able to control the switching of the switching element according to the measurement value of the combustible gas concentration sensor and the temperature sensor. According to the invention, the generation of explosion of a transmitter may be avoided in a combustible gas environment at work.
Description
Technical field
The present invention relates to transmitter technical field, particularly relate to a kind of transmitter with explosion prevention function.
Background technology
Transmitter sensor output signal can be changed into and by the converter of the signal of controller identification, can be widely used in commercial production.
When transmitter uses in places such as oil, chemical industry, mines, owing to there is inflammable gas in working environment, and various electronic devices and components are installed in transmitter, once inflammable gas enters in transmitter, very easily produce blast, bring great infringement to the personal safety of production and staff.
As shown in Figure 1, in prior art, transmitter mainly comprises controller, amplifying unit, filter unit, A/D converting unit and supply module composition, supply module is respectively controller, amplifying unit, A/D converting unit are powered, amplifying unit amplifies the electric signal that sensing element records, and the signal after amplifying is exported to filter unit.Filter unit carries out filtering to the electric signal after amplification, and filtered signal is exported to A/D converting unit, and A/D converting unit is changed signal, and the signal after being changed by A/D exports to controller.And the transmitter of explosion-proof type controls to prevent the inflammable gas in working environment from entering in shell of transducer mainly through the sealing of shell of transducer, thus prevent transmitter under inflammable gas environment, causing the blast of inflammable gas.But along with the increase of service time, aging along with transmitter, its sealing can be deteriorated gradually, and inflammable gas easily enters in transmitter, very easily produces blast.
Summary of the invention
Based on the technical matters that background technology exists, the present invention proposes a kind of transmitter with explosion prevention function.
A kind of transmitter with explosion prevention function that the present invention proposes, comprises housing, sensing element, intermediate treatment unit, controller, combustable gas concentration sensor, temperature sensor, supply module and on-off element;
Be provided with dividing plate in housing, enclosure interior space is divided into the first cavity and the second cavity by dividing plate, and the first cavity is annular seal space; Intermediate treatment unit, combustable gas concentration sensor, temperature sensor, on-off element and controller are all arranged in the first cavity, and sensing element is arranged in the second cavity;
Sensing element is used for producing pressure signal when being subject to External Force Acting;
Intermediate treatment unit is electrically connected with sensing element, and it processes for the signal produced sensing element; And by the Signal transmissions after process to controller;
Combustable gas concentration sensor is electrically connected with controller, and it is for detecting the combustable gas concentration in the first cavity;
Temperature sensor is electrically connected with controller, and it is for detecting the temperature in the first cavity;
On-off element comprises energization input, power supply output terminal and control end, and energization input is electrically connected with supply module, and power supply output terminal is electrically connected with controller, and control end is electrically connected with controller;
The concentration value that combustable gas concentration sensor records by controller compares with the preset concentration value in controller, obtains the first comparative result; And the temperature value recorded by temperature sensor compares with the temperature value preset in controller, obtains the second comparative result; Controller controls the duty of on-off element according to the first comparative result and the second comparative result.
Preferably, the concentration value that combustable gas concentration sensor records is greater than temperature value that preset concentration value or temperature sensor record when being greater than preset temperature value, and controller controls on-off element and disconnects.
Preferably, also comprise alarm, alarm is connected with controller.
Preferably, the periphery of the second cavity is provided with threaded joints, and it is for being connected with external device (ED).
Preferably, the signal wire of sensing element and intermediate treatment unit is connected through the dividing plate in housing, encapsulation process between signal wire and dividing plate.
Preferably, intermediate treatment unit comprises amplifying unit, filter unit and A/D converting unit, and amplifying unit is electrically connected with sensing element, and it amplifies for the signal produced sensing element; Filter unit is electrically connected with amplifying unit, and it is for carrying out filtering process to the signal after amplification; A/D converting unit is electrically connected with filter unit and controller respectively, and it is for carrying out A/D conversion to filtered signal, and the signal after being changed by A/D exports to controller.
Preferably, controller is electrically connected with amplifying unit, A/D converting unit, and supply module is powered to amplifying unit, A/D converting unit by controller.
Preferably, controller is electrically connected with outside display instrument, and the wire for connection control device and outside display instrument passes housing, and encapsulation process between this wire and housing.
Compared with prior art, the present invention has following beneficial effect:
A kind of transmitter with explosion prevention function provided by the invention, by arranging dividing plate, enclosure interior space is separated into the first cavity and the second cavity, first cavity is annular seal space, and be arranged in the first cavity the intermediate treatment unit of electric spark, combustable gas concentration sensor, temperature sensor, on-off element and controller may be produced, thus prevent the spark that transmitter internal circuit produces and the blast caused.In addition, detected by the concentration of combustable gas concentration sensor to the inflammable gas in the first cavity, detected the temperature in the first cavity by temperature sensor, controller controls the on-off element be connected between supply module and controller according to the testing result of combustable gas concentration sensor and the testing result of temperature sensor.Thus the combustable gas concentration temperature reached in preset value or the first cavity ensureing in the first cavity is when reaching preset temperature value, controller controls on-off element and disconnects, and prevents transmitter to ignite inflammable gas and produce blast.
Accompanying drawing explanation
Fig. 1 is the structural representation of transmitter in prior art;
Fig. 2 is a kind of structural representation with the transmitter of explosion prevention function provided by the invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, specific embodiment is described in detail.
As shown in Figure 2, Fig. 2 is a kind of structural representation with the transmitter of explosion prevention function that the present invention proposes.Comprise housing, sensing element, intermediate treatment unit, controller, combustable gas concentration sensor, temperature sensor, alarm, supply module and on-off element.
Be provided with dividing plate in housing, enclosure interior space is divided into the first cavity and the second cavity by dividing plate, and the first cavity is annular seal space.Intermediate treatment unit, combustable gas concentration sensor, temperature sensor, on-off element and controller are all arranged in the first cavity, because the first cavity is hermetically-sealed construction, effectively can keep apart inflammable gas in pyrophoric circuit and working environment may be produced in transmitter, thus can prevent the inflammable gas in working environment from blasting.Sensing element is arranged in the second cavity, and the periphery of the second cavity is provided with threaded joints, and it is for being connected with external device (ED).
Sensing element is used for producing pressure signal when being subject to External Force Acting.
Intermediate treatment unit is electrically connected with sensing element, and it processes for the signal produced sensing element, and by the Signal transmissions after process to controller.During concrete enforcement, connect the signal wire of sensing element and intermediate treatment unit through the dividing plate in housing, encapsulation process between signal wire and dividing plate.
In present embodiment, intermediate treatment unit comprises amplifying unit, filter unit and A/D converting unit, and amplifying unit is electrically connected with sensing element, and it amplifies for the signal produced sensing element.Filter unit is electrically connected with amplifying unit, and it is for carrying out filtering process to the signal after amplification.A/D converting unit is electrically connected with filter unit and controller respectively, and it is for carrying out A/D conversion to filtered signal, and the signal after being changed by A/D exports to controller.
Combustable gas concentration sensor is electrically connected with controller, and it is for detecting the combustable gas concentration in the first cavity.
Temperature sensor is electrically connected with controller, and it is for detecting the temperature in the first cavity.
On-off element comprises energization input, power supply output terminal and control end, and energization input is electrically connected with supply module, and power supply output terminal is electrically connected with controller, and control end is electrically connected with controller.Controller is electrically connected with amplifying unit, A/D converting unit, and supply module is powered to amplifying unit, A/D converting unit by controller.Alarm is connected with controller, and when specifically implementing, alarm is powered by controller.
Controller is electrically connected with outside display instrument, and the wire for connection control device and outside display instrument passes housing, and encapsulation process between this wire and housing.
The concentration value that combustable gas concentration sensor records by controller compares with the preset concentration value in controller, obtains the first comparative result; And the temperature value recorded by temperature sensor compares with the temperature value preset in controller, obtains the second comparative result.Controller controls the duty of on-off element according to the first comparative result and the second comparative result.During concrete enforcement, when the concentration value that combustable gas concentration sensor records be greater than temperature value that preset concentration value or temperature sensor record be greater than preset temperature value time, controller controls alarm equipment alarm, then control on-off element to disconnect, thus when ensureing that the temperature entered in inflammable gas or transmitter reaches certain value in the first cavity, transmitter power-off prevent because of transmitter inside produce spark or temperature too high and cause flammable gas explosion.
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (8)
1. there is a transmitter for explosion prevention function, it is characterized in that: comprise housing, sensing element, intermediate treatment unit, controller, combustable gas concentration sensor, temperature sensor, supply module and on-off element;
Be provided with dividing plate in housing, enclosure interior space is divided into the first cavity and the second cavity by dividing plate, and the first cavity is annular seal space; Intermediate treatment unit, combustable gas concentration sensor, temperature sensor, on-off element and controller are all arranged in the first cavity, and sensing element is arranged in the second cavity;
Sensing element is used for producing pressure signal when being subject to External Force Acting;
Intermediate treatment unit is electrically connected with sensing element, and it processes for the signal produced sensing element; And by the Signal transmissions after process to controller;
Combustable gas concentration sensor is electrically connected with controller, and it is for detecting the combustable gas concentration in the first cavity;
Temperature sensor is electrically connected with controller, and it is for detecting the temperature in the first cavity;
On-off element comprises energization input, power supply output terminal and control end, and energization input is electrically connected with supply module, and power supply output terminal is electrically connected with controller, and control end is electrically connected with controller;
The concentration value that combustable gas concentration sensor records by controller compares with the preset concentration value in controller, obtains the first comparative result; And the temperature value recorded by temperature sensor compares with the temperature value preset in controller, obtains the second comparative result; Controller controls the duty of on-off element according to the first comparative result and the second comparative result.
2. the transmitter with explosion prevention function according to claim 1, it is characterized in that: the concentration value that combustable gas concentration sensor records is greater than temperature value that preset concentration value or temperature sensor record when being greater than preset temperature value, and controller controls on-off element and disconnects.
3. the transmitter with explosion prevention function according to claim 1, it is characterized in that: also comprise alarm, alarm is connected with controller.
4. the transmitter with explosion prevention function according to claim 1, it is characterized in that: the periphery of the second cavity is provided with threaded joints, it is for being connected with external device (ED).
5. the transmitter with explosion prevention function according to claim 1, is characterized in that: connect the signal wire of sensing element and intermediate treatment unit through the dividing plate in housing, encapsulation process between signal wire and dividing plate.
6. the transmitter with explosion prevention function according to claim 1, it is characterized in that: intermediate treatment unit comprises amplifying unit, filter unit and A/D converting unit, amplifying unit is electrically connected with sensing element, and it amplifies for the signal produced sensing element; Filter unit is electrically connected with amplifying unit, and it is for carrying out filtering process to the signal after amplification; A/D converting unit is electrically connected with filter unit and controller respectively, and it is for carrying out A/D conversion to filtered signal, and the signal after being changed by A/D exports to controller.
7. the transmitter with explosion prevention function according to claim 6, is characterized in that: controller is electrically connected with amplifying unit, A/D converting unit, and supply module is powered to amplifying unit, A/D converting unit by controller.
8. the transmitter with explosion prevention function according to claim 1, is characterized in that: controller is electrically connected with outside display instrument, and the wire for connection control device and outside display instrument passes housing, and encapsulation process between this wire and housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510874890.3A CN105547579A (en) | 2015-11-30 | 2015-11-30 | Transmitter with explosion-proof function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510874890.3A CN105547579A (en) | 2015-11-30 | 2015-11-30 | Transmitter with explosion-proof function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105547579A true CN105547579A (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510874890.3A Pending CN105547579A (en) | 2015-11-30 | 2015-11-30 | Transmitter with explosion-proof function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105547579A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092345A (en) * | 2016-08-15 | 2016-11-09 | 成都众山科技有限公司 | A kind of wireless temperature pick-up device |
| CN106153244A (en) * | 2016-08-15 | 2016-11-23 | 成都众山科技有限公司 | A kind of explosion-proof wireless pressure pick-up device |
| CN106253262A (en) * | 2016-08-01 | 2016-12-21 | 合肥燃气集团有限公司 | A kind of natural gas system power distribution equipment and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2316655Y (en) * | 1996-11-26 | 1999-04-28 | 辛德强 | Detector for combustible gas |
| CN102081003A (en) * | 2009-11-27 | 2011-06-01 | 上海莫克电子技术有限公司 | Voltage transmitter with good safety |
| EP1618362B1 (en) * | 2003-04-29 | 2011-12-07 | Endress + Hauser GmbH + Co. KG | Temperature-compensated pressure gauge |
| CN202583113U (en) * | 2012-04-17 | 2012-12-05 | 电光防爆科技（上海）有限公司 | Carbon monoxide sensor |
| CN203191137U (en) * | 2013-03-06 | 2013-09-11 | 重庆市伟岸测器制造股份有限公司 | Pressure transmitter |
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2015
- 2015-11-30 CN CN201510874890.3A patent/CN105547579A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2316655Y (en) * | 1996-11-26 | 1999-04-28 | 辛德强 | Detector for combustible gas |
| EP1618362B1 (en) * | 2003-04-29 | 2011-12-07 | Endress + Hauser GmbH + Co. KG | Temperature-compensated pressure gauge |
| CN102081003A (en) * | 2009-11-27 | 2011-06-01 | 上海莫克电子技术有限公司 | Voltage transmitter with good safety |
| CN202583113U (en) * | 2012-04-17 | 2012-12-05 | 电光防爆科技（上海）有限公司 | Carbon monoxide sensor |
| CN203191137U (en) * | 2013-03-06 | 2013-09-11 | 重庆市伟岸测器制造股份有限公司 | Pressure transmitter |
| CN204228687U (en) * | 2014-10-29 | 2015-03-25 | 湖南镭目科技有限公司 | A kind of gas analysis sensor |
Non-Patent Citations (1)
| Title |
|---|
| 机械工业仪器仪表综合技术经济研究所: "《仪器仪表产品目录》", 31 December 2009 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253262A (en) * | 2016-08-01 | 2016-12-21 | 合肥燃气集团有限公司 | A kind of natural gas system power distribution equipment and control method |
| CN106253262B (en) * | 2016-08-01 | 2018-12-14 | 合肥燃气集团有限公司 | A kind of natural gas system power distribution equipment and control method |
| CN106092345A (en) * | 2016-08-15 | 2016-11-09 | 成都众山科技有限公司 | A kind of wireless temperature pick-up device |
| CN106153244A (en) * | 2016-08-15 | 2016-11-23 | 成都众山科技有限公司 | A kind of explosion-proof wireless pressure pick-up device |
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