CN203642972U - Gas flow meter - Google Patents

Gas flow meter Download PDF

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Publication number
CN203642972U
CN203642972U CN201320838726.3U CN201320838726U CN203642972U CN 203642972 U CN203642972 U CN 203642972U CN 201320838726 U CN201320838726 U CN 201320838726U CN 203642972 U CN203642972 U CN 203642972U
Authority
CN
China
Prior art keywords
sensor
measuring
installation
tube
gas flow
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
Application number
CN201320838726.3U
Other languages
Chinese (zh)
Inventor
王晟
王彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUZHOU RUIERWEI ELECTRONIC SCIENCE & TECHNOLOGY Co Ltd
Original Assignee
SUZHOU RUIERWEI ELECTRONIC SCIENCE & TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SUZHOU RUIERWEI ELECTRONIC SCIENCE & TECHNOLOGY Co Ltd filed Critical SUZHOU RUIERWEI ELECTRONIC SCIENCE & TECHNOLOGY Co Ltd
Priority to CN201320838726.3U priority Critical patent/CN203642972U/en
Application granted granted Critical
Publication of CN203642972U publication Critical patent/CN203642972U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a gas flow meter. The gas flow meter is characterized by comprising a measuring tube, a sensor installing tube and an external constant temperature difference circuit, wherein a cavity is formed in the sensor installing tube, the lower end of the sensor installing tube is inserted in the measuring tube, a first sensor is arranged at the lower end of the sensor installing tube in the gas flowing direction, a second sensor is arranged in the cavity of the sensor installing tube, and the first sensor and the second sensor are electrically connected to the external constant temperature difference circuit. The gas flow meter is simple in structure, convenient to use and capable of effectively eliminating measurement errors caused by a zero point, thereby improving measuring accuracy.

Description

A kind of gas meter
Technical field
The utility model belongs to fields of measurement, is specifically related to a kind of gas meter.
Background technology
The principle of at present general gas meter is, at tube wall, thermal source is set outward, utilize the mobile heat transfer relation of gas, measure the heat of being taken away by gas molecule on thermal source, thereby thereby obtain the gas flow in gas molecule quality unit of account time that correspondence flows through.Existing gas meter generally enters to adopt a measuring sensor, and in actual measurement process, the various factors such as temperature, pressure of gas can exert an influence to the heat transfer coefficient of gas, drifts about zero point thereby make to measure, and has caused the reduction of measuring accuracy.
Summary of the invention
The purpose of this utility model is to provide one and can overcomes above-mentioned defect, can measure in real time power zero point, gets rid of extremely, improves the gas meter of measuring accuracy.
For realizing above-mentioned utility model object, the utility model has adopted following technical scheme:
A kind of gas meter, it is characterized in that, comprise measuring tube, in establish installation of sensors pipe and the outside constant difference circuit of cavity, the lower end of described installation of sensors pipe is inserted into measuring tube inside, the lower end of described installation of sensors pipe is provided with first sensor towards gas flow direction, in the cavity of described installation of sensors pipe, be provided with the second sensor, described first sensor and the second sensor are electrically connected in outside constant difference circuit.
As one of preferred version, described first sensor and the second sensor are by a heating element and a temperature element composition.
As one of preferred version, described installation of sensors pipe is fixed on the sidewall of measuring tube.
As one of preferred version, described first sensor and the second sensor are electrically connected at outside constant difference circuit by an analog switch.
As one of preferred version, described first sensor is used for measuring actual gas flow, and described the second sensor is used for measuring value conduct at zero point with reference to value.
As one of preferred version, described measuring tube is pipe or square tube.
Utility model advantage:
Gas meter tool described in the utility model has the following advantages: gas meter described in the utility model is simple in structure, easy to use, can effectively get rid of zero point to measuring the error causing, thereby improve measuring accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of gas meter described in the utility model;
Wherein, 1, measuring tube, 2, installation of sensors pipe, 3, first sensor, 4, the second sensor
Embodiment
Below in conjunction with accompanying drawing and a preferred embodiment, the technical solution of the utility model is further described.
Embodiment:
As shown in Figure 1: a kind of gas meter that the present embodiment discloses, comprise measuring tube 1, in establish installation of sensors pipe 2 and the outside constant difference circuit of cavity, the lower end of described installation of sensors pipe 2 is inserted into measuring tube 1 inside, the lower end of described installation of sensors pipe 2 is provided with first sensor 3 towards gas flow direction, in the cavity of described installation of sensors pipe 2, be provided with the second sensor 4, described first sensor 3 and the second sensor 4 are electrically connected at outside constant difference circuit.
As one of preferred version, described first sensor 3 and the second sensor 4 are by a heating element and a temperature element composition.
As one of preferred version, described installation of sensors pipe 2 is fixed on the sidewall of measuring tube 1.
As one of preferred version, described first sensor 3 and the second sensor 4 are electrically connected at outside constant difference circuit by an analog switch.
As one of preferred version, described first sensor 3 is for measuring actual gas flow, and described the second sensor 4 is for measuring value conduct at zero point with reference to value.
As one of preferred version, described measuring tube 1 is pipe or square tube.
It is to be noted; as described above is only in order to explain the preferred embodiment of the utility model; not attempt is done any formal restriction to the utility model according to this; be with; all any modification or changes that has the relevant the utility model of doing under identical utility model spirit, all must be included in the category of the utility model intention protection.

Claims (6)

1. a gas meter, it is characterized in that, comprise measuring tube, in establish installation of sensors pipe and the outside constant difference circuit of cavity, the lower end of described installation of sensors pipe is inserted into measuring tube inside, the lower end of described installation of sensors pipe is provided with first sensor towards gas flow direction, in the cavity of described installation of sensors pipe, be provided with the second sensor, described first sensor and the second sensor are electrically connected in outside constant difference circuit.
2. gas meter according to claim 1, is characterized in that, described first sensor and the second sensor are by a heating element and a temperature element composition.
3. gas meter according to claim 2, is characterized in that, described installation of sensors pipe is fixed on the sidewall of measuring tube.
4. gas meter according to claim 3, is characterized in that, described first sensor and the second sensor are electrically connected at outside constant difference circuit by an analog switch.
5. gas meter according to claim 4, is characterized in that, described first sensor is used for measuring actual gas flow, and described the second sensor is used for measuring value conduct at zero point with reference to value.
6. gas meter according to claim 5, is characterized in that, described measuring tube is pipe or square tube.
CN201320838726.3U 2013-12-18 2013-12-18 Gas flow meter Expired - Fee Related CN203642972U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320838726.3U CN203642972U (en) 2013-12-18 2013-12-18 Gas flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320838726.3U CN203642972U (en) 2013-12-18 2013-12-18 Gas flow meter

Publications (1)

Publication Number Publication Date
CN203642972U true CN203642972U (en) 2014-06-11

Family

ID=50874207

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320838726.3U Expired - Fee Related CN203642972U (en) 2013-12-18 2013-12-18 Gas flow meter

Country Status (1)

Country Link
CN (1) CN203642972U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103697955A (en) * 2013-12-18 2014-04-02 苏州瑞尔维电子科技有限公司 Gas flow meter
CN106512166A (en) * 2016-12-30 2017-03-22 深圳市普博科技有限公司 Setting method and device of tidal volume of anaesthesia machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103697955A (en) * 2013-12-18 2014-04-02 苏州瑞尔维电子科技有限公司 Gas flow meter
CN106512166A (en) * 2016-12-30 2017-03-22 深圳市普博科技有限公司 Setting method and device of tidal volume of anaesthesia machine
CN106512166B (en) * 2016-12-30 2019-01-11 深圳市普博科技有限公司 The setting method and device of anesthesia apparatus tidal volume

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140611

Termination date: 20141218

EXPY Termination of patent right or utility model