CN206440360U - A kind of Natural gas standard turbine flowmeter overspeed protection system - Google Patents

A kind of Natural gas standard turbine flowmeter overspeed protection system Download PDF

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Publication number
CN206440360U
CN206440360U CN201720096852.4U CN201720096852U CN206440360U CN 206440360 U CN206440360 U CN 206440360U CN 201720096852 U CN201720096852 U CN 201720096852U CN 206440360 U CN206440360 U CN 206440360U
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China
Prior art keywords
valve
flow
flowmeter
ball valve
control system
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CN201720096852.4U
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Chinese (zh)
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闫文灿
裴勇涛
薛永鑫
王吉开
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China Petroleum and Chemical Corp
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Center For Measurement Research China Petroleum & Chemical Corp Natural Gas Branch
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Abstract

The utility model provides a kind of Natural gas standard turbine flowmeter overspeed protection system; including the first ball valve being sequentially connected, self-driving type safety cut-off valve, standard turbine meter, tested flowmeter, the second ball valve; and electrically connected with standard turbine meter signal acquisition and converting unit, the calibrating control system with the electrical connection of signal acquisition and converting unit, the output end of calibrating control system is connected with the control end of self-driving type safety cut-off valve;Signal acquisition and converting unit are used under the control of calibrating control system, the gas flow signals that collection and transfer standard turbine flowmeter are detected, and transmit to calibrating control system;Calibrating control system controls the disconnection of self-driving type safety cut-off valve according to the gas flow signals.The system uses chain logic control by setting up self-driving type safety cut-off valve, and to turbine overspeed protection, can realize the overspeed protection to standard turbine meter, and automaticity is high, and reaction speed is fast.

Description

A kind of Natural gas standard turbine flowmeter overspeed protection system
Technical field
The utility model is related to Measurement System of Natural Gas field, is specifically related to a kind of Natural gas standard turbine flowmeter and surpasses Fast protection system.
Background technology
The metering method of current China's natural gas is mainly volume metering, wherein, gauge table station owner will enter to volume instrument Row calibrating.Turbine flowmeter being selected for being detected the standard set-up of meter proof more.Turbine flowmeter has that stability is good, standard The features such as exactness is high, range ratio is fast, repdocutbility is good, but because it uses the mechanical structure with movable member, surpass when there is flow velocity When crossing the range upper limit of turbine flowmeter, influence can be produced on the metering performance of turbine flowmeter, turbine flow can be damaged when serious Gauge, causes the damage of measurement criteria standard.In actual mechanical process, due to the upstream ball valve for balance turbine flowmeter The accident that the reason such as front and rear pressure differential or maloperation causes turbine flowmeter hypervelocity to be damaged often has generation, and control room personnel are remote Site technique flow, it is impossible to find that turbine flowmeter exceeds the speed limit in time by vibrations, noise, and directly settling mode passes through closing Technological process flow control valve reduces flow to realize the overspeed protection of turbine flowmeter.
The content of the invention
In order to overcome the deficiencies in the prior art, the utility model provides that a kind of automaticity is high and reaction speed is fast Natural gas standard turbine flowmeter overspeed protection system.
A kind of Natural gas standard turbine flowmeter overspeed protection system of the present utility model, including the first ball valve and successively The standard turbine meter of connection, tested flowmeter, the second ball valve;Also include what one end was connected with the outlet side of the first ball valve Self-driving type safety cut-off valve, the signal acquisition and converting unit that are electrically connected with standard turbine meter and signal acquisition and conversion The calibrating control system of the electrical connection of unit;And the input of the other end of self-driving type safety cut-off valve and mark turbine flowmeter Connection, the output end of calibrating control system is connected with the control end of self-driving type safety cut-off valve;Wherein, standard turbine meter, Tested flowmeter, which is respectively used to detect, flows through standard turbine meter, the gas flow of tested flowmeter;Signal acquisition and conversion Unit is used under the control of calibrating control system, the gas flow signals that collection and transfer standard turbine flowmeter are detected, And transmit to calibrating control system;Calibrating control system controls the disconnected of self-driving type safety cut-off valve according to the gas flow signals Open.
It is preferred that, in addition to flow control valve, flow bypass valve;The inlet end of flow control valve is defeated with tested flowmeter Go out end connection, the outlet side of flow control valve is connected with the inlet end of the second ball valve;The inlet end of flow bypass valve and standard whirlpool The input connection of flowmeters, the outlet side of flow bypass valve is connected with the inlet end of the second ball valve;Flow control valve, flow The control end of by-passing valve is electrically connected with the output end of calibrating control system.
It is preferred that, in addition to alarm unit, the input of alarm unit is electrically connected with the output end of calibrating control system.
It is preferred that, in addition to the 3rd ball valve, the inlet end of the 3rd ball valve is connected with the inlet end of the first ball valve, the 3rd ball valve Outlet side be connected with the outlet side of the second ball valve, the control end of the 3rd ball valve is electrically connected with the output end of calibrating control system.
It is preferred that, in addition to for filtering out one end and first for being separated by filtration unit, being separated by filtration unit of gaseous impurity The outlet side connection of ball valve, is separated by filtration the other end of unit and is connected with described one end of self-driving type safety cut-off valve.
It is preferred that, in addition to carry out the pressure regulation steady flow unit of pressure regulation and current stabilization to gas, one end of pressure regulation steady flow unit with The other end connection of self-driving type safety cut-off valve, the other end of pressure regulation steady flow unit is defeated with standard turbine meter respectively Enter end, the inlet end connection of flow bypass valve.
The beneficial effects of the utility model are:A kind of Natural gas standard turbine flowmeter overspeed protection system of the present utility model System, by setting up self-driving type safety cut-off valve, the gas flow letter that collection standard turbine meter is detected in technological process Number, and the chain logic control of turbine overspeed protection is set in calibrating control system, calibrating control system is to gas flow signals Analyzed, it is quick to disconnect self-driving type safety cut-off valve when gas flow exceedes maximum upper limit, cut off source of the gas;Examine and determine simultaneously Control system produces high alarm, high alarm signal according to safe class, and carries out relevant control operation to related valve, so that The overspeed protection to standard turbine meter is realized, and whole process automaticity is high, reaction speed is fast, and then avoids peace The generation of full accident.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
The structure of Natural gas standard turbine flowmeter overspeed protection system of the present utility model a kind of as shown in figure 1, including First ball valve 1 and the standard turbine meter 5 being sequentially connected, tested flowmeter 6, the second ball valve 8;
Also include self-driving type safety cut-off valve 3 and standard turbine meter that one end is connected with the outlet side of the first ball valve 1 The signal acquisition and converting unit 9 of 5 electrical connections, the calibrating control system 10 with the electrical connection of signal acquisition and converting unit 9;And The other end of self-driving type safety cut-off valve 3 is connected with marking the input of turbine flowmeter 5, the output end of calibrating control system 10 It is connected with the control end of self-driving type safety cut-off valve 3;
Wherein, standard turbine meter 5, tested flowmeter 6 be respectively used to detection flow through standard turbine meter 5, it is tested The gas flow of flowmeter 6;Signal acquisition and converting unit 9 are used under the control of calibrating control system 10, collection and conversion The gas flow signals that standard turbine meter 5 is detected, and transmit to calibrating control system 10;The basis of calibrating control system 10 The disconnection of the gas flow signals control self-driving type safety cut-off valve 3.Signal acquisition and converting unit 9 can use MTL5532 Chip is realized.
Further, the protection system also includes flow control valve 7, flow bypass valve 11.Flow control valve 7 enters Gas end is connected with the output end of tested flowmeter 6, and the outlet side of flow control valve 7 is connected with the inlet end of the second ball valve 8.Stream The inlet end of amount by-passing valve 11 is connected with the input of standard turbine meter 5, the outlet side of flow bypass valve 11 and the second ball The inlet end connection of valve 8.The output end electricity of flow control valve 7, the control end of flow bypass valve 11 with calibrating control system 10 Connection.
Further, the protection system also includes alarm unit 13.The input of alarm unit 13 and calibrating control system The output end electrical connection of system 10.
Further, the protection system also includes also including the 3rd ball valve 12.The inlet end and first of 3rd ball valve 12 The inlet end connection of ball valve 1, the outlet side of the 3rd ball valve 12 is connected with the outlet side of the second ball valve 8, the control of the 3rd ball valve 12 End is electrically connected with the output end of calibrating control system 10.
Further, what the protection system also included being used for filtering out gaseous impurity is separated by filtration unit 2.It is separated by filtration list One end of member 2 is connected with the outlet side of the first ball valve 1, is separated by filtration the other end of unit 2 and the institute of self-driving type safety cut-off valve 3 State one end connection.
Further, the protection system also includes the pressure regulation steady flow unit 4 that pressure regulation and current stabilization are carried out to gas.Pressure regulation is steady One end of stream unit 4 is connected with the other end of self-driving type safety cut-off valve 3, the other end of pressure regulation steady flow unit 4 respectively with The inlet end connection of the input, flow bypass valve 11 of standard turbine meter 5.
Its operation principle is as follows:
The first ball valve 1, the second ball valve 8, flow control valve 7 are opened, self-driving type safety cut-off valve 3 is connected into, the 3rd ball is closed Valve 12, opens standard turbine meter 5.In the utility model, standard turbine meter can have multiple, corresponding, be detected stream Gauge also has multiple, and flow control valve also has multiple, and forms a plurality of pipeline.To avoid flow occur when pipeline switches transfiniting Situation occur, whole system 10 can monitor in real time the instantaneous delivery of every pipeline, i.e. signal acquisition and converting unit 9 calibrating The gas flow signals that standard turbine meter 5 is detected are gathered under the control of control system 10.Calibrating control system 10 will connect The gas flow received is compared with the gas flow set, if the gas flow received exceedes the gas flow of setting The first percentage such as 80%, and without departing from the gas flow of setting the second percentage such as 100% when, produce high alarm Signal is simultaneously delivered to alarm unit 13.Alarm unit 13 is alarmed using the first type of alarm.If the gas flow received surpasses Go out the second percentage of the gas flow of setting, and without departing from the gas flow of setting the 3rd percentage such as 120% when, production Sheng Gaogao alarm signals are simultaneously delivered to alarm unit 13.Alarm unit 13 is alarmed using the second type of alarm.Meanwhile, calibrating control The control flow control valve 7 of system 10 is closed, and flow bypass valve 11 is opened, while flow value is periodically detected, until what is received Second percentage of the gas flow not less than the gas flow of setting.Now, control flow control valve 7 is opened, flow bypass valve 11 close, after non-maloperation to be confirmed, continue adjusting gas flow, prevent maloperation from causing damage to standard turbine meter 5. When three percentage of the gas flow received beyond the gas flow of setting, the control self-driving type peace of calibrating control system 10 Full stop valve 3 disconnects immediately, with protective standard turbine flowmeter 5;The 3rd ball valve 12 is controlled to open simultaneously, to ensure other masters Ventilate on main line.
The part not illustrated in specification is prior art or common knowledge.It is new that the present embodiment is merely to illustrate the practicality Type, rather than limit scope of the present utility model, equivalent replacement that those skilled in the art are done for the utility model etc. Modification is deemed to fall within the utility model right claim institute protection domain.

Claims (6)

1. a kind of Natural gas standard turbine flowmeter overspeed protection system, including the first ball valve (1) and the standard being sequentially connected Turbine flowmeter (5), tested flowmeter (6), the second ball valve (8);It is characterized in that:
Also include self-driving type safety cut-off valve (3) and standard turbine meter that one end is connected with the outlet side of the first ball valve (1) (5) signal acquisition and converting unit (9) of electrical connection, the calibrating electrically connected with signal acquisition and converting unit (9) control system Unite (10);And the other end of self-driving type safety cut-off valve (3) is connected with the input of mark turbine flowmeter (5), calibrating control The output end of system (10) is connected with the control end of self-driving type safety cut-off valve (3);
Wherein, standard turbine meter (5), tested flowmeter (6) are respectively used to detection and flow through standard turbine meter (5), quilt Examine the gas flow of flowmeter (6);Signal acquisition and converting unit (9) are used under the control of calibrating control system (10), adopt The gas flow signals that collection and transfer standard turbine flowmeter (5) are detected, and transmit to calibrating control system (10);Calibrating control System (10) processed controls the disconnection of self-driving type safety cut-off valve (3) according to the gas flow signals.
2. a kind of Natural gas standard turbine flowmeter overspeed protection system according to claim 1, it is characterised in that:Also wrap Include flow control valve (7), flow bypass valve (11);The inlet end of flow control valve (7) connects with the output end of tested flowmeter (6) Connect, the outlet side of flow control valve (7) is connected with the inlet end of the second ball valve (8);The inlet end and mark of flow bypass valve (11) The input connection of quasi- turbine flowmeter (5), the outlet side of flow bypass valve (11) is connected with the inlet end of the second ball valve (8); The output end of flow control valve (7), the control end of flow bypass valve (11) with calibrating control system (10) is electrically connected.
3. a kind of Natural gas standard turbine flowmeter overspeed protection system according to claim 2, it is characterised in that:Also wrap Alarm unit (13) is included, the input of alarm unit (13) is electrically connected with the output end of calibrating control system (10).
4. a kind of Natural gas standard turbine flowmeter overspeed protection system according to claim 1, it is characterised in that:Also wrap The 3rd ball valve (12) is included, the inlet end of the 3rd ball valve (12) is connected with the inlet end of the first ball valve (1), the 3rd ball valve (12) go out Gas end is connected with the outlet side of the second ball valve (8), the control end of the 3rd ball valve (12) and the output end of calibrating control system (10) Electrical connection.
5. a kind of Natural gas standard turbine flowmeter overspeed protection system according to any one of claim 1 to 4, it is special Levy and be:Also include being used for the one end and the first ball that are separated by filtration unit (2), are separated by filtration unit (2) that filter out gaseous impurity The outlet side connection of valve (1), the other end for being separated by filtration unit (2) is connected with described one end of self-driving type safety cut-off valve (3).
6. a kind of Natural gas standard turbine flowmeter overspeed protection system according to any one of claim 2 to 4, it is special Levy and be:Also include the pressure regulation steady flow unit (4) that pressure regulation and current stabilization are carried out to gas, one end of pressure regulation steady flow unit (4) with from The other end connection of drive formula safety cut-off valve (3), the other end of pressure regulation steady flow unit (4) respectively with standard turbine meter (5) the inlet end connection of input, flow bypass valve (11).
CN201720096852.4U 2017-01-24 2017-01-24 A kind of Natural gas standard turbine flowmeter overspeed protection system Active CN206440360U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720096852.4U CN206440360U (en) 2017-01-24 2017-01-24 A kind of Natural gas standard turbine flowmeter overspeed protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720096852.4U CN206440360U (en) 2017-01-24 2017-01-24 A kind of Natural gas standard turbine flowmeter overspeed protection system

Publications (1)

Publication Number Publication Date
CN206440360U true CN206440360U (en) 2017-08-25

Family

ID=59636655

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720096852.4U Active CN206440360U (en) 2017-01-24 2017-01-24 A kind of Natural gas standard turbine flowmeter overspeed protection system

Country Status (1)

Country Link
CN (1) CN206440360U (en)

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Effective date of registration: 20200814

Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No.

Patentee after: China Petroleum & Chemical Corp.

Address before: 430070 No. 126 Optics Valley Avenue, East Lake New Technology Development Zone, Wuhan, Hubei

Patentee before: METERING RESEARCH CENTER, NATURAL GAS BRANCH OF CHINA PETROLEUM AND CHEMICAL Corp.