CN113155243B - High-pressure natural gas mobile verification vehicle - Google Patents
High-pressure natural gas mobile verification vehicle Download PDFInfo
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- CN113155243B CN113155243B CN202110482471.0A CN202110482471A CN113155243B CN 113155243 B CN113155243 B CN 113155243B CN 202110482471 A CN202110482471 A CN 202110482471A CN 113155243 B CN113155243 B CN 113155243B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/04—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting mechanically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
- B60S9/10—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/04—Enclosed load compartments ; Frameworks for movable panels, tarpaulins or side curtains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D53/00—Tractor-trailer combinations; Road trains
- B62D53/04—Tractor-trailer combinations; Road trains comprising a vehicle carrying an essential part of the other vehicle's load by having supporting means for the front or rear part of the other vehicle
- B62D53/06—Semi-trailers
Abstract
The invention discloses a high-pressure natural gas mobile verification vehicle which is formed by refitting a standard van semi-trailer and comprises a gooseneck type semi-trailer underframe, wherein a suspension system assembly, a semi-trailer axle assembly and supporting legs are arranged at the bottom of the gooseneck type semi-trailer underframe, a van structure is arranged above the gooseneck type semi-trailer underframe, the van structure comprises a positive pressure control chamber at the front part and a flying wing type van body at the rear side, the positive pressure control chamber adopts a positive pressure ventilation design, and a PLC (programmable logic controller) and an electric system, an explosion-proof positive pressure control system, an illuminating system and a verification control system which are connected with the PLC are matched and sleeved in the van structure; the inner part of the flying wing type compartment body is fixed with a verification process system through a prying seat, the left side wing and the right side wing of the flying wing type compartment body are hinged on a top beam body of the flying wing type compartment body and are opened and closed through a hydraulic oil cylinder, and the rear side face of the flying wing type compartment body is of a double-door structure. The composite explosion-proof system integrates positive pressure, intrinsic safety and explosion-proof technology, has advanced structure, simple operation, safety and reliability, and can be widely used in dangerous places of two regions.
Description
Technical Field
The invention relates to the technical field of high-pressure natural gas verification, in particular to a mobile verification vehicle for high-pressure natural gas.
Background
The national metrology of the people's republic of China stipulates: the compulsory verification is carried out on metering devices used for trade settlement, safety protection, medical sanitation and environmental monitoring. Failure to test or not to test according to the specified application, and no use is required ". Different fluid media have different characteristics, so that the flow meter has different verification results; even for the same fluid medium, as the main gas flow meter (turbine and ultrasonic) for trade metering, under the conditions of normal pressure and high pressure, metering errors are respectively located in different flow characteristic areas, error data verified under the normal pressure cannot represent error characteristics under the high pressure, so that the related standard and regulation (DIN EN 12261) requires that verification should be carried out in a verification system close to the actual working pressure and medium of the flow meter under the working pressure of more than 0.4 MPa. In recent years, natural gas is developed at a high speed, the number of matched instruments is very large, and in order to meet the ever-increasing verification requirement of a natural gas flow meter, a high-pressure natural gas flow verification standard device needs to be established to perform real-flow verification on the flow meter.
Traditional natural gas flow standard device all fixes in a certain place, can not remove, and traditional vehicular gas flow standard device uses air or inert gas as the verification medium mostly moreover, and the explosion-proof requirement is unsatisfied to the device, can't use under the natural gas station yard operating mode.
Disclosure of Invention
The invention aims to provide a high-pressure natural gas mobile verification vehicle to solve the technical problems in the background technology.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the high-pressure natural gas mobile verification vehicle is formed by refitting a standard van semi-trailer and comprises a gooseneck type semi-trailer underframe, wherein the front end of the gooseneck type semi-trailer underframe is provided with a suspension system assembly connected with a tractor, the rear side of the gooseneck type semi-trailer underframe is provided with a semi-trailer axle assembly, the bottom of the gooseneck type semi-trailer underframe is provided with supporting legs, a van structure is arranged above the gooseneck type semi-trailer axle assembly, the semi-trailer axle assembly adopts a rear double-shaft form, each side of each shaft is provided with two tires, and the gooseneck type semi-trailer axle assembly is provided with an ABS (anti-lock brake system) and a gas braking system, the van structure comprises a front positive pressure control chamber and a rear wing type van body, the positive pressure control chamber adopts a positive pressure ventilation design, an inlet of the positive pressure control chamber adopts a double-door structure consisting of an inner door and an outer door, a handle and a ladder are arranged at the outer door, a closed buffer chamber is formed between the inner door and the outer door, a PLC controller and an electric system connected with the PLC controller are sleeved in the positive pressure control chamber inside the buffer chamber, The system comprises an explosion-proof positive pressure control system, a lighting system and a verification control system, wherein a driving auxiliary system and an emergency stop button for controlling a gas circuit braking system are arranged in a positive pressure control chamber; a verification process system is fixed in the flying wing type compartment body through a prying seat, the left side wing and the right side wing of the flying wing type compartment body are hinged on a top beam body of the flying wing type compartment body and are opened and closed through a hydraulic oil cylinder, and the rear side face of the flying wing type compartment body is of a double-door structure;
the electric system comprises an explosion-proof control box arranged on the front wall inside the positive pressure control room and an electric control cabinet arranged on the left wall inside the positive pressure control room, the electric control cabinet is electrically connected with the explosion-proof control box and adopts a chain control design, when a dangerous condition occurs, the explosion-proof control box can automatically cut off the power supply of the electric control cabinet in an emergency, a PLC controller, an I/O data acquisition card, a communication board card, an Ethernet switch, a surge protector, a wiring terminal, a circuit breaker and a UPS power supply are arranged inside the electric control cabinet and are electrically connected with the PLC controller, the PLC controller is externally connected with an industrial computer and a printer and is connected with a natural gas verification station control system through a TCP/IP protocol, the industrial computer and the printer are placed on a workbench inside the positive pressure control room, and the UPS power supply is used as a standby power supply to supply power to the PLC controller and the industrial computer under the emergency power-off condition, ensuring that certification data is not lost.
Preferably, explosion-proof malleation control system includes malleation ventilation system and safety alarm system, malleation ventilation system includes explosion-proof control box, explosion-proof centrifugal fan and takes the solenoid valve gas vent, explosion-proof centrifugal fan installs in malleation control room outside front wall right side to be connected with explosion-proof control box electricity, and filter equipment and explosion-proof air brake are installed in proper order to its air inlet from outside to inside, take the solenoid valve gas vent to open on malleation control room outside front wall right side, its inside automatic discharge valve is connected with explosion-proof control box electricity, explosion-proof control box realizes the indoor outer pressure detection of malleation control room through the pressure detecting element of this ampere design to realize the above-mentioned safety interlock function that automatic ventilation, the end of taking a breath automatically provided permission power transmission signal, malleation protection upper and lower limit warning and the low power outage of automatic suggestion pressure before the start through its inside the control unit, the safety alarm system comprises an explosion-proof combustible gas detector, an explosion-proof smoke detector and an explosion-proof audible and visual alarm which are connected with the PLC, the explosion-proof combustible gas detector and the explosion-proof audible and visual alarm are both installed on the front wall inside the positive pressure control room, and the explosion-proof smoke detector is installed on the roof inside the positive pressure control room.
Preferably, the verification process system comprises a metrological verification pipeline, the metrological verification pipeline comprises an upstream straight pipe section and a downstream straight pipe section, the upstream straight pipe section is connected with a detected meter station of a natural gas verification station, two detected ultrasonic waves or turbine flowmeters can be simultaneously detected in series, one DN80 verification pipeline, one DN150 verification pipeline and two DN300 verification pipelines which are mutually connected in parallel are arranged between the upstream straight pipe section and the downstream straight pipe section, each verification pipeline is sequentially provided with an electric forced sealing ball valve, a tube bundle rectifier, a standard turbine flowmeter, an expansion joint and an electric flow regulating valve from front to back along the gas flowing direction, the length of the front straight pipe section of the standard turbine flowmeter needs to be more than five times of the pipe diameter of the standard turbine flowmeter, the length of the rear straight pipe section needs to be more than three times of the pipe diameter of the standard turbine flowmeter, and the standard turbine flowmeter is matched with a high-precision Rosste pressure transmitter and a temperature transmitter, the device is used for compensating and correcting temperature and pressure for flow measurement, the pressure transmitter is used for taking pressure at a flowmeter body and is intensively installed at an installation plate inside the flying wing type van body, the temperature transmitter is installed in an interval that a downstream straight pipe section of the flowmeter is less than three times of pipe diameter length, two ends of a DN80 verification pipeline and a DN150 verification pipeline are respectively connected with an upstream straight pipe section and a downstream straight pipe section through a DN150 manifold, two ends of a DN300 verification pipeline are respectively connected with the upstream straight pipe section and the downstream straight pipe section through a DN400 manifold, a beam rectifier and a DN300 verification ultrasonic flowmeter are sequentially connected in series on the upstream straight pipe section along the gas flow direction, a DN80 verification ultrasonic flowmeter and a beam rectifier are sequentially connected in series between the beam rectifier of a DN80 pipeline and a standard turbine flowmeter from front to back, the DN300 verification ultrasonic flowmeter and the DN80 verification ultrasonic flowmeter front straight pipe section length is more than ten times of the pipe diameter, the length of the rear straight pipe section needs to be more than five times of the pipe diameter of the rear straight pipe section, the DN300 verification ultrasonic flowmeter and the DN80 verification ultrasonic flowmeter are matched with a high-precision Rosemont pressure transmitter and a temperature transmitter, the pressure transmitter takes pressure from a flowmeter body and is centrally installed at an installation plate inside the flying wing type carriage body, the temperature transmitter is installed in an interval of the length of the downstream straight pipe section of the flowmeter, which is less than three times of the pipe diameter, the inlet end of the upstream straight pipe section and the tail end of the downstream straight pipe section are respectively arranged at two sides of the rear end of the flying wing type carriage body, a DN150 manifold and a DN400 manifold are fixed in the flying wing type carriage body by two layers, namely the upper layer and the lower layer, of the upstream straight pipe section and the downstream straight pipe section are respectively arranged at two sides of the rear end of the flying wing type carriage body, the PLC is connected with each component of a process system through cables, and the collection of flow, pressure and temperature and the on-off control of each valve are realized through a verification control system;
wherein, the metering and detecting pipeline adopts 2 German RMG high-precision ultrasonic flowmeters as the checking ultrasonic flowmeter, 1 DN80ANSI600 measuring range is 5-600m3The volume is used for small flow check, and the range of DN300ANSI600 measuring range is 70-9400m3And/h, the flow meter is used for large-flow verification, 4 German RMG high-precision turbine flow meters are selected as standard turbine flow meters for the four verification pipelines, and 1 DN80G100ANSI600 range of 16-160m is respectively selected for one DN80 verification pipeline, one DN150 verification pipeline and two DN300 verification pipelines3Per, 1 DN150G400ANSI600 measuring range 65-650m3/h, 2 DN300G2500ANSI600 range 400-function 4400m3H, the parallel combination of four paths of verification pipelines is used, so that 20-8600m is realized3And h, flow verification and check in a full range.
Preferably, the verification process system further comprises a component analysis pipeline, an automatic pressure balance pipeline and an automatic valve leakage checking pipeline, wherein the component analysis pipeline comprises a sampling valve, one end of the sampling valve is connected with a downstream straight pipe section, the other end of the sampling valve is connected to a gas chromatography analyzer arranged on the front side face of the wing type carriage body, the gas chromatography analyzer is matched with a pretreatment system, a carrier gas and a standard gas cylinder, the pretreatment system is used for decompressing and filtering sample gas, an exhaust port of the pretreatment system and the outlet end of the gas chromatography analyzer are connected with a first emptying pipeline, and the first emptying pipeline is arranged at the upper right position on the inner side of the wing type carriage body and extends to the outside of the rear side face of the wing type carriage body to be communicated with the atmosphere;
the automatic pressure balancing pipeline comprises a gas taking pipeline with the diameter of 12mm, one end of the gas taking pipeline is connected with a DN400 manifold at the upstream, the other end of the gas taking pipeline is sequentially connected with a first electromagnetic valve and a second electromagnetic valve in series, the outlet end of the second electromagnetic valve is connected to the front position of a rear expansion joint of each standard turbine flowmeter of the verification pipeline through a third electromagnetic valve respectively, and is connected with a second emptying pipeline through a fourth electromagnetic valve, and the second emptying pipeline is arranged at the upper left position of the inner side of the flying wing type carriage body and extends out of the rear side surface of the flying wing type carriage body to be communicated with the atmosphere;
the electric forced sealing ball valve is an Orbit forced sealing ball valve matched with a Rotork electric actuating mechanism, a valve seat of the electric forced sealing ball valve is a BB type valve seat with the functions of discharging and monitoring the sealing performance of the valve seat, the automatic valve leakage detection pipeline comprises a fifth electromagnetic valve, one end of the fifth electromagnetic valve is connected with a gas taking pipeline from a leakage detection point between a first electromagnetic valve and a second electromagnetic valve, the other end of the fifth electromagnetic valve is connected with the valve seat of the electric forced sealing ball valve through a sixth electromagnetic valve respectively, and is connected with a second emptying pipeline through a pressure transmitter, a seventh electromagnetic valve and a first manual valve which are connected in series, and the two sides of the seventh electromagnetic valve and the two sides of the first manual valve are connected with the two ends of the second manual valve respectively;
the PLC controller is connected with each component of a component analysis pipeline, an automatic pressure balance pipeline and an automatic valve leakage checking pipeline through cables, the collection of pressure and component information and the opening and closing control of each valve are realized through a verification control system, the verification control system adopts a Beckhoff EL1258 pulse collection module to collect standard turbine flow meters, checked meters and check ultrasonic flow meter pulse signals, EL1258 not only has higher channel density, but also has a multi-timestamp function and higher performance, the EL1258 is synchronous with other EtherCAT equipment through a distributed clock system, therefore, a unified time base can be used for measuring events in the whole system, in order to trace the source of clock frequency, Beckhoff EL2258 is selected for outputting the distributed clock frequency of the system and is used in combination with a timestamp input module EL1258, the distributed clock precision of the EL2258 is lower than 1 mu s, and the standard flow meter has 2 paths of pulse output, the detected flowmeter and the checking flowmeter respectively have 1 path of pulse output, and the calibration pulse data acquisition module achieves the highest flow measurement accuracy through the double timing processing technology used by the standard flowmeter and the detected flowmeter.
Preferably, dispose manual discharge valve and explosion-proof air conditioner in the malleation control room, explosion-proof air conditioner adopts 1.5P components of a whole that can function independently wall-hanging air conditioner, and its inner machine is installed on the wall before the malleation control indoor portion, and outer machine is installed in the outside front wall left side of malleation control indoor portion and is set up side by side with explosion-proof centrifugal fan, explosion-proof centrifugal fan and explosion-proof air conditioner outer machine pass through the tripe formula guard box and seal.
Preferably, the lighting system comprises a set of explosion-proof fluorescent lamps which are arranged on the roof inside the positive pressure control chamber and are electrically connected with the explosion-proof control box.
Preferably, the supporting legs include four mechanical legs and four hydraulic legs, and four mechanical legs are fixed in gooseneck formula semi-mounted chassis neck both sides and semi-trailer bridge assembly rear both sides position respectively, and four hydraulic legs set up respectively in gooseneck formula semi-mounted chassis department of all-wing aircraft formula box four corners position below, and hydraulic legs set up in the mechanical legs outside.
Preferably, the skirt edge position of gooseneck type semi-mounted underframe is provided with toolbox and hydraulic pump station, hydraulic pump station links to each other with hydraulic leg and hydraulic cylinder, and its explosion-proof hydraulic pump passes through explosion-proof control box and connects external power source to control explosion-proof hydraulic pump through the remote controller and supply hydraulic oil and realize the lift of four hydraulic leg and the expansion and draw in of left and right flank.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is provided with a positive pressure control room, the positive pressure control room is a composite explosion-proof system integrating positive pressure, intrinsic safety and explosion-proof technology, and a complete set of safety alarm equipment is arranged in the positive pressure control room, and the system comprises: the alarm system comprises a combustible gas alarm, a smoke detector, an acousto-optic alarm lamp and the like, wherein the alarm signal is uploaded to a control system in real time, and the control system performs interlocking control, so that the alarm system is advanced in structure, simple to operate, safe and reliable, and can be widely applied to two-area dangerous places with IIA, IIB and IIC grades and T1-T4 groups of explosive gas mixtures;
2. the positive pressure control room and the natural gas verification station control system communicate in an Ethernet mode, and send verification signals to the station control system in real time in the verification process by adopting a Modbus TCP/IP communication protocol, and receive related instructions of the station control system; in the verification process, personnel can operate software in a positive pressure control room or a natural gas verification station control room in a remote desktop mode, and two working modes of local and remote are supported;
3. the verification vehicle is provided with the flying wing type carriage body, the left side wing and the right side wing can be turned over by 90 degrees through the remote controller, so that the maintenance and the disassembly and the assembly of equipment in the verification vehicle are facilitated, the balance weight and the balance are considered in the installation of the equipment in the vehicle, four mechanical support legs are used for supporting the weight in daily work, wheels are in an unstressed state, and the stability of a long-term parking state is favorably maintained;
4. the design pressure of a verification vehicle system is 10MPa, a verification medium is natural gas, two detected flowmeters of the same type can be verified/calibrated simultaneously in series, the flow range of the ultrasonic flowmeter for vehicle interior verification covers the flow range of the whole system through reasonable type selection of a standard turbine flowmeter and a verification ultrasonic flowmeter, and 20-8600m can be realized3Flow verification and verification in full range, all standard flowmeters (turbine flowmeters) in the verification vehicle can trace the source under a natural gas secondary sonic nozzle standard device in full range, and the standard meter has higher uncertainty level and stronger practicability;
5. the pipeline design of the verification vehicle adopts a large (DN 400) and small header (DN 150) form, and the large header is connected with two DN300 metering verification pipelines and is used for verifying the flow meter during large flow; the small collecting pipe is connected with DN80 and DN150 metering verification pipelines and used for verifying the flowmeter under the small flow, the influence of the pipe volume effect on the small flow verification is reduced to the minimum, the verification precision is improved, the large collecting pipe and the small collecting pipe are arranged in two layers, the large collecting pipe is arranged below the small collecting pipe, the small collecting pipe is arranged above the large collecting pipe, the large flow verification requirement and the small flow verification requirement are met, and the integral balance and the balance weight of the vehicle are met;
6. in the invention, considering that the standard turbine flowmeter in the verification vehicle needs to be periodically checked (once a year), the standard turbine flowmeter needs to be disassembled during check, and meanwhile, the manual telescopic joint is arranged in each verification pipeline in the verification vehicle, the telescopic length is 50mm, and the problem that the standard turbine flowmeter of the traditional mobile device cannot be disassembled is solved;
7. the automatic pressure balance system adopts the combination of the 12mm gas taking pipeline and the matched electromagnetic valve to realize the automatic pressure balance function of the system, effectively avoids the impact of high flow rate on a standard turbine flowmeter, changes the original manual operation mode by the design of automatic pressure balance, and improves the verification efficiency;
8. the invention realizes the automatic valve leakage detection function through the electromagnetic valve, the pressure transmitter and the matched pipeline, monitors the tightness of the forced sealing ball valve in real time in the verification process, and avoids the influence on the verification result due to the internal leakage of the valve;
9. the invention adopts a high-precision algorithm, communicates with a natural gas verification station control system in real time, and fully automatically controls a bypass electric flow regulating valve (indirect control) and an in-vehicle electric flow regulating valve (direct control) of a natural gas station verification station according to real-time flow to realize dynamic balance of pressure and flow so as to achieve very stable verification conditions, and the verification control system realizes one-key verification by matching with special software of a verification system under the condition of installation preparation of a detected meter, namely fully-automatic pressure regulation, flow stabilization, pre-running, verification, flow point switching and report generation, has high flow regulation speed and high flow regulation precision (better than 2 percent of set flow), and the flow stability degree in the verification process is better than the current ultrasonic and turbine flow verification standards.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:
fig. 1 is a schematic structural diagram of a high-pressure natural gas mobile verification vehicle according to the present invention;
FIG. 2 is a right side view of a high pressure natural gas mobile verification vehicle according to the present invention;
FIG. 3 is a rear view of a high pressure natural gas mobile verification vehicle according to the present invention;
FIG. 4 is a schematic structural diagram of a positive pressure control chamber of a high pressure natural gas mobile verification vehicle according to the present invention;
FIG. 5 is a schematic structural diagram of a metrological verification pipeline of a high-pressure natural gas mobile verification vehicle according to the present invention;
FIG. 6 is a pipeline layout diagram of a metrological verification pipeline and a component analysis pipeline of a high pressure natural gas mobile verification vehicle according to the present invention;
fig. 7 is a pipeline layout diagram of an automatic pressure balancing pipeline of a high-pressure natural gas mobile verification vehicle according to the present invention;
FIG. 8 is a pipeline layout diagram of an automatic valve leak testing pipeline of the mobile verification vehicle for high-pressure natural gas according to the invention;
fig. 9 is a signal connection schematic diagram of a verification control system of a high-pressure natural gas mobile verification vehicle according to the present invention.
Reference numerals: 1-gooseneck type semi-trailer underframe, 2-semitrailer axle assembly, 3-mechanical outrigger, 4-hydraulic outrigger, 5-skirt edge, 6-positive pressure control chamber, 601-inner door, 602-outer door, 603-buffer chamber, 604-explosion-proof control box, 605-electric control cabinet, 606-UPS power supply, 607-workbench, 608-explosion-proof centrifugal fan, 609-filter device, 610-explosion-proof air brake, 611-exhaust port with electromagnetic valve, 612-explosion-proof air conditioner, 613-explosion-proof combustible gas detector, 614-explosion-proof smoke detector, 615-explosion-proof audible and visual alarm, 616-protection box, 617-explosion-proof fluorescent lamp, 7-flying wing type compartment body, 8-side wing, 9-hydraulic oil cylinder, 10-double door, 11-pry seat, 12-certification process system, 1201-upstream straight pipe section, 1202-tube bundle rectifier, 1203-DN300 verification ultrasonic flowmeter, 1204-DN150 collection tube, 1205-DN400 collection tube, 1206-DN80 verification ultrasonic flowmeter, 1207-electric forced seal ball valve, 1208-standard turbine flowmeter, 1209-expansion joint, 1210-electric flow control valve, 1211-downstream straight pipe section, 1212-sampling valve, 1213-gas chromatography analyzer, 1214-first vent line, 1215-gas extraction line, 1216-first solenoid valve, 1217-second solenoid valve, 1218-third solenoid valve, 1219-fourth solenoid valve, 1220-second vent line, 1221-fifth solenoid valve, 1222-sixth solenoid valve, 1223-pressure transmitter, 1224-seventh solenoid valve, 1225-first manual valve, 1226-second manual valve, 13-mounting plate, 14-cable access module.
Detailed Description
Hereinafter, an embodiment of a high pressure natural gas mobile verification vehicle of the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
In the description of the present invention, it should be noted that the terms "front", "back", "left", "right", "top", "bottom", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. Preferred embodiments of the present invention are described in further detail below with reference to FIGS. 1-9:
as shown in fig. 1-3, the high-pressure natural gas mobile verification vehicle is formed by modifying a standard van semi-trailer, and comprises a gooseneck type semi-trailer chassis 1 made of high-quality high-strength steel, wherein a suspension system assembly connected with a tractor is arranged at the front end of the gooseneck type semi-trailer chassis 1, a semi-trailer axle assembly 2 is arranged on the rear side, supporting legs are arranged at the bottom, a van structure is arranged above the suspension system assembly, the van structure comprises a positive pressure control chamber 6 on the front part and a flying wing type van body 7 on the rear side, the suspension system assembly is standard equipment and can be connected with various brands of standard tractors, and the tractor is provided with a safe fire cap and can be used in a natural gas station;
as shown in fig. 4 and 9, the positive pressure control room 6 is designed by positive pressure ventilation, and the design standard follows: DIN EN 60079-13, the entrance of which adopts a double-door structure composed of an inner door 601 and an outer door 602, the outer door 602 is provided with a handle and a ladder, a closed buffer room 603 is formed between the inner door 601 and the outer door 602, and a PLC controller, an electric system connected with the PLC controller, an explosion-proof positive pressure control system, an illumination system and a verification control system are matched and sleeved in a positive pressure control chamber 6 in the buffer room 603;
the electrical system comprises an explosion-proof control box 604 arranged on the front wall inside the positive pressure control room 6 and an electrical control cabinet 605 arranged on the left wall inside the positive pressure control room 6, the electrical control cabinet 605 is electrically connected with the explosion-proof control box 604 and adopts an interlocking control design, when dangerous conditions occur, the explosion-proof control box 604 can automatically cut off the power supply of the electrical control cabinet 605 in an emergency, a PLC controller and I/O data acquisition cards, communication board cards, Ethernet switches, surge protectors, wiring terminals, circuit breakers, UPS power supplies 606 and other supporting equipment which are electrically connected with the PLC controller are arranged inside the electrical control cabinet 605, the PLC controller is externally connected with an industrial computer and a printer and is connected with a natural gas verification station control system through a TCP/IP protocol, the industrial computer and the printer are arranged on a workbench 607 inside the positive pressure control room 6 and are matched with verification system special software for realizing metering, The UPS 606 is a 24VDC explosion-proof uninterrupted power supply which is used as a standby power supply to supply power to a PLC controller and an industrial computer under the condition of emergency power failure for verification data storage and ensuring that verification data is not lost, a verification operator generally performs instrument verification work in the positive pressure control room 6 to facilitate synchronous operation of the verification operator on site working conditions and verification software, and meanwhile an operation station is arranged in the central control room of the natural gas station, and the undisturbed switching function of PS8 verification software between the positive pressure control room 6 and the central control room of the natural gas verification station is realized by utilizing a Windows remote desktop assembly, the operation of verification software can be carried out in the positive pressure control room 6 or the central control room of the natural gas verification station, and two working modes of local and remote are supported;
the explosion-proof positive pressure control system comprises a positive pressure ventilation system and a safety alarm system, the positive pressure ventilation system comprises an explosion-proof control box 604, an explosion-proof centrifugal fan 608 and a vent port 611 with an electromagnetic valve, the explosion-proof centrifugal fan 608 is arranged on the right side of the external front wall of a positive pressure control room 6 and is electrically connected with the explosion-proof control box 604, a filtering device 609 and an explosion-proof air brake 610 are sequentially arranged at the air inlet of the explosion-proof centrifugal fan 608 from outside to inside, the explosion-proof centrifugal fan 608 is used for establishing a micro-positive pressure system in the positive pressure control room 6, external clean air is sucked into the positive pressure control room 6 through a fan, indoor micro-positive pressure is realized, the vent port 611 with the electromagnetic valve is arranged on the right side of the external front wall of the positive pressure control room 6, an automatic exhaust valve in the explosion-proof centrifugal fan 608 is electrically connected with the explosion-proof control box 604, the pressure detection unit designed by intrinsic safety realizes the internal and external pressure detection in the positive pressure control room 6, the internal and external pressure difference values of the positive pressure control room 6 can be directly seen in the positive pressure control room 6, and meanwhile, a pressure switch signal is output to a positive pressure control system of the explosion-proof control box 604, so that the safety interlocking function of allowing a power transmission signal, alarming at the upper and lower limits of positive pressure protection and automatically prompting the power failure with low pressure requirement is automatically provided by a control unit in the explosion-proof control box 604 before starting, after the air exchange is finished, the safety alarm system comprises an explosion-proof combustible gas detector 613, an explosion-proof smoke detector 614 and an explosion-proof audible and visual alarm 615 which are connected with a PLC (programmable logic controller), the explosion-proof combustible gas detector 613 and the explosion-proof audible and visual alarm 615 are both installed on the front wall in the positive pressure control room 6, the explosion-proof smoke detector 614 is installed on the roof in the positive pressure control room 6, and the explosion-proof combustible gas detector 613 detects the concentration of the combustible gas in the positive pressure control room 6 in real time, the combustible gas concentration signal is output to a verification control system to realize the signal exchange and the interlocking logic control of the verification control system and the positive pressure control system, meanwhile, the combustible gas concentration high-reporting and high-reporting signals are output to a positive pressure control system to realize interlocking logic control, the anti-explosion smoke detector 614 detects smoke in the positive pressure control chamber 6 in real time and outputs the signals to the positive pressure control system to realize interlocking logic control, when the PLC detects any dangerous signal (such as a signal for giving a high concentration of combustible gas, giving a smoke alarm and the like) in the positive pressure control system, the explosion-proof audible and visual alarm 615 outputs an audible and visual alarm, so that a user can conveniently and effectively find the alarm reason in time and start corresponding protective measures, and the explosion-proof control box 604 has the functions of controlling the opening and closing of the explosion-proof centrifugal fan 608, detecting the pressure inside and outside the positive pressure control chamber 6, and acquiring and controlling signals of the explosion-proof combustible gas detector 613, the explosion-proof smoke detector 614 and the like;
a manual exhaust valve and an explosion-proof air conditioner 612 are also arranged in the positive pressure control room 6, the explosion-proof air conditioner 612 adopts a 1.5P split wall-mounted air conditioner and is used for adjusting the temperature in the positive pressure control room 6 and creating a comfortable office environment for users, an internal unit of the air conditioner is installed on the front wall in the positive pressure control room 6, an external unit of the air conditioner is installed on the left side of the front wall outside the positive pressure control room 6 and is arranged in parallel with an explosion-proof centrifugal fan 608, and the explosion-proof centrifugal fan 608 and the external unit of the explosion-proof air conditioner 612 are sealed by a louvered protection box 615;
the lighting system comprises a set of explosion-proof fluorescent lamps 617 (2 x 20W/AC 220V), wherein the explosion-proof fluorescent lamps 617 are installed on the roof inside the positive pressure control room 6 and are electrically connected with the explosion-proof control box 604;
a verification process system 12 is fixed inside the flying wing type carriage body 7 through a prying seat 11, the left and right side wings 8 are hinged on a top beam body and opened and closed through a hydraulic oil cylinder 9, the rear side face of the flying wing type carriage body is provided with a double-door 10 structure, and a manual switch can be used for connecting a calibration pipeline;
as shown in fig. 5-8, the verification process system 12 includes a metrological verification pipeline, a component analysis pipeline, an automatic pressure balance pipeline, and an automatic valve leakage checking pipeline, as shown in fig. 5-6, the metrological verification pipeline includes an upstream straight pipe section 1201 and a downstream straight pipe section 1211, the upstream straight pipe section 1201 is connected to a detected meter station of a natural gas verification station, and can simultaneously and serially verify two detected ultrasonic wave or turbine flow meters, a DN80 verification pipeline, a DN150 verification pipeline, and two DN300 verification pipelines are disposed between the upstream straight pipe section 1201 and the downstream straight pipe section 1211, and each verification pipeline is sequentially provided with an electric forced sealing ball valve 1207, a tube bundle rectifier 1202, a standard turbine flow meter 1208, a telescopic joint 1209, and an electric flow regulating valve 1210 along a gas flow direction, the electric forced sealing ball valve 1207 is an Orbit forced sealing ball valve of a matched rot electric actuating mechanism, the valve seat of the standard turbine flowmeter 1208 selects a BB type valve seat with the functions of discharging and monitoring the sealing performance of the valve seat, the middle of a soft sealing material embedded in the valve seat is provided with a plurality of leakage detection holes, if the valve seat is sealed to be in a problem, gas can permeate into a groove at the back of the BB type valve seat through the leakage detection holes, the groove gas can be guided through the valve body and is connected to the outside of the valve body, and then whether the valve seat is sealed tightly can be judged by opening a detection device at the outside of the valve body, the length of a front straight pipe section of the standard turbine flowmeter 1208 is required to be more than five times of the pipe diameter of the straight pipe section, the length of a rear straight pipe section of the standard turbine flowmeter 1208 is required to be more than three times of the pipe diameter of the straight pipe section of the straight pipe, and the standard turbine flowmeter 1208 is matched with a high-precision Rosemate pressure transmitter and a temperature transmitter for compensating and correcting the temperature of the flow measurement, the pressure transmitter is used for taking the pressure of the flowmeter body and is intensively installed at the mounting plate 13 inside the flying wing type carriage body 7, the temperature transmitter is arranged in an interval of the downstream straight pipe section of the flowmeter, wherein the pipe diameter length of the interval is less than three times that of the straight pipe section; the two ends of the DN80 verification pipeline and the DN150 verification pipeline are respectively connected with the upstream straight pipe section 1201 and the downstream straight pipe section 1211 through a DN150 junction 1204, the two ends of the two DN300 verification pipelines are respectively connected with the upstream straight pipe section 1201 and the downstream straight pipe section 1211 through a DN400 junction 1205, the upstream straight pipe section 1201 is sequentially connected with a pipe bundle rectifier 1202 and a DN300 verification ultrasonic flowmeter 1203 in series along the gas flowing direction, a DN80 ultrasonic flowmeter 1206 and a pipe bundle rectifier 1202 are sequentially connected in series from front to back between the pipe bundle rectifier 1202 and a standard turbine flowmeter 1208 of the DN80 verification pipeline, the DN300 verification ultrasonic flowmeter 1203 and the DN80 verification ultrasonic flowmeter 1206 are required to be longer than ten times of the pipe diameter of the front straight pipe section, the length of the rear straight pipe section is required to be longer than five times of the pipe diameter of the rear straight pipe section, and the DN300 verification ultrasonic flowmeter and the DN 1203 80 verification ultrasonic flowmeter 1206 are matched with a high-precision Rosimon pressure transmitter and a temperature transmitter, the pressure transmitters are used for taking pressure from the flowmeter body and are intensively arranged on the mounting plate 13 inside the flying wing type carriage body 7, the temperature transmitters are arranged in an interval that the downstream straight pipe section of the flowmeter is less than three times of the pipe diameter, the inlet end of the upstream straight pipe section 1201 and the tail end of the downstream straight pipe section 1211 are respectively arranged on two sides of the rear end of the flying wing type carriage body 7, and a DN150 manifold 1204 and a DN400 manifold 1205 are fixed in the flying wing type carriage body 7 through an upper layer and a lower layer of a prying seat 11;
as shown in fig. 6, the component analysis pipeline includes a sampling valve 1212, one end of the sampling valve 1212 is connected to the downstream straight pipe section 1211, the other end of the sampling valve 1212 is connected to a gas chromatography analyzer 1213 disposed on the front side surface of the winged car body 7, the gas chromatography analyzer 1213 is matched with a pretreatment system, a carrier gas and a standard gas cylinder, the pretreatment system is used for pressure reduction and filtration of sample gas, an exhaust port of the pretreatment system and an outlet end of the gas chromatography analyzer 1213 are both connected to a first vent line 1214, and the first vent line 1214 is disposed at the upper right inside the winged car body 7 and extends to the outside of the rear side surface of the winged car body 7 to communicate with the atmosphere;
as shown in fig. 7, the automatic pressure balancing pipeline includes a gas intake pipeline 1215 with a pipe diameter of 12mm, one end of the gas intake pipeline 1215 is connected to the DN400 manifold 1205 at the upstream, the other end is connected in series with a first electromagnetic valve 1216 and a second electromagnetic valve 1217, the outlet end of the second electromagnetic valve 1217 is respectively connected to the front position of the rear expansion joint 1209 of each verification pipeline standard turbine flowmeter 1208 through a third electromagnetic valve 1218 and is connected to a second vent pipeline 1220 through a fourth electromagnetic valve 1219, and the second vent pipeline 1220 is arranged at the upper left position inside the winged compartment body 7 and extends to the outside of the rear side surface of the winged compartment body 7 to communicate with the atmosphere;
as shown in fig. 8, the automatic valve leakage checking pipeline includes a fifth solenoid valve 1221, one end of the fifth solenoid valve 1221 is connected to a gas taking line 1215 from a leakage detection point between a first solenoid valve 1216 and a second solenoid valve 1217, the other end of the fifth solenoid valve 1221 is connected to a valve seat of the electric forced sealing ball valve 1207 through a sixth solenoid valve 1222 and is connected to a second vent line 1220 through a pressure transmitter 1223, a seventh solenoid valve 1224, and a first manual valve 1225 connected in series, and the seventh solenoid valve 1224 and both sides of the first manual valve 1225 are connected to both ends of a second manual valve 1226;
as shown in fig. 9, the PLC controller is connected to components of the calibration process system 12, such as a standard turbine flowmeter 1208, a verification ultrasonic flowmeter, a temperature transmitter, a pressure transmitter 1223, an electric forced sealing ball valve 1207, an electromagnetic valve, and a gas chromatograph 1213, through cables, and realizes acquisition of flow, pressure, temperature, and component information and on-off control of each valve through the calibration control system, the cables are led out from the electrical control cabinet 605, led into the interior of the flying wing type compartment 7 through the cable entry and exit module 14 at the back side of the positive pressure control chamber 6, and connected to the components of the calibration process system 12 through an explosion-proof junction box provided at the mounting plate 13;
the verification control system is designed according to full-automatic verification, on the premise that the detected flowmeter is installed in place, a verification operator only needs to create corresponding detected meter information and select a corresponding verification program to click to start, so that the one-key verification function of the detected flowmeter is realized, after the verification system is started, a standard pipeline required to be used is automatically selected by the verification control system according to a flow set value, the standard pipeline is communicated with a natural gas station control system in real time in an Ethernet mode, the station bypass flow regulating valve and the mobile verification vehicle internal flow regulating valve are controlled simultaneously in a full-automatic mode according to real-time flow to achieve a dynamic balance state of pressure flow, when the flow delivered to the mobile verification vehicle reaches 95% of a set value, the control station flow regulating valve is stopped, flow fine adjustment is realized on the mobile verification vehicle internal flow regulating valve, and the flow control meets the set requirement, the verification control system flow regulation algorithm changes the mode of manual operation required in the flow regulation of the traditional natural gas verification station, greatly shortens the flow regulation time, and improves the flow regulation precision, thereby effectively improving the verification efficiency of the flow meter;
the support legs comprise four mechanical legs 3 and four hydraulic legs 4, the four mechanical legs 3 are respectively fixed on two sides of the neck of the gooseneck type semi-trailer chassis 1 and two sides of the rear part of the semi-trailer bridge assembly 2, the four hydraulic legs 4 are respectively arranged at the gooseneck type semi-trailer chassis 1 below the four corners of the flying wing type box body 7, the hydraulic legs 4 are arranged on the outer sides of the mechanical legs 2, and the hydraulic legs 4 can respectively adjust the support heights thereof so as to achieve a horizontal fixed state;
a tool box and a hydraulic pump station are arranged at the position of the skirt edge 5 of the gooseneck type semi-trailer underframe 1, the hydraulic pump station is connected with the hydraulic support legs 4 and the hydraulic oil cylinder 9, an explosion-proof hydraulic pump of the hydraulic pump station is connected with an external power supply through an explosion-proof control box 604, and the explosion-proof hydraulic pump is controlled by a remote controller to supply hydraulic oil to realize the lifting of the four hydraulic support legs 4 and the unfolding and folding of the left and right side wings 8;
the power supply of a hydraulic system of the mobile calibration vehicle is connected with an external power supply through an explosion-proof control box 604, an explosion-proof hydraulic pump is started, a hydraulic actuating element is driven by a wireless remote controller to realize the lifting function of the side wing 8 and the hydraulic supporting leg 4, a main operating valve of the hydraulic system adopts an inlet piece, the synchronization precision is high, and the hydraulic system has the function of eliminating terminal errors so as to ensure that each action runs stably, and a bidirectional balance valve or a bidirectional hydraulic lock is designed and installed on all hydraulic cylinders of the actuating element so as to ensure the safety of the hydraulic system during detection;
the hydraulic oil supplied by the explosion-proof hydraulic pump (main power unit) can realize the following actions: four hydraulic support legs 4 (a left front support leg, a right front support leg, a left rear support leg and a right rear support leg) are lifted, and side wings 8 (a left side wing and a right side wing) are unfolded and folded;
the hydraulic control circuit system of the mobile calibration vehicle adopts a DC24V direct-current power supply for power supply, and realizes the working and state maintenance of all levels of the mobile calibration vehicle through the combination of all levels of liquid and electricity;
the semi-trailer axle assembly 2 adopts a rear double-axle form, two tires are arranged on each side of each axle, and an ABS (anti-lock braking system) and an air path braking system are arranged on each axle, and a driving auxiliary system and an emergency stop button for controlling the air path braking system are arranged in the positive pressure control chamber 6;
after the mobile calibration vehicle is unfolded, the length is about 12.6m, the height of the highest part of the side wing 8 from the ground is about 4.8m, the width of the whole vehicle is about 5.3m, no obstacle is required to be arranged above and at the left and the right of a parking place of the natural gas detection semitrailer, the effectiveness and the safety of normal operation are ensured, and after the mobile calibration vehicle is stably parked, the side slope is confirmed to be not more than 5 degrees;
the oil level of hydraulic oil in a hydraulic oil tank is checked and determined to be higher than a specified scale, whether the hydraulic oil is in a normal state (whether the hydraulic oil is frozen or solidified) or not is determined, the hydraulic oil is filled to be low-temperature hydraulic oil at minus 30 ℃, when the field temperature is lower than minus 30 ℃, the hydraulic system is strictly forbidden to operate, whether the oil leakage phenomenon occurs in a mobile calibration vehicle or not is checked, whether signal wiring of each electrical component and the component per se are normal or not is checked according to an electrical schematic diagram, and after all the components are determined to be normal, the system can be operated next step.
Before the electrical control cabinet 605 is started for the first time, the fan system needs to be started for full ventilation, the ventilation volume reaches 10 times of the volume of the positive pressure control chamber 6, it is ensured that no fuel gas exists in the positive pressure control chamber 6, then the electrical control cabinet 605 is started to start normal work, the positive pressure system monitors the pressure in the positive pressure control chamber 6 in real time, and it is ensured that the positive pressure control chamber 6 is in a micro-positive pressure state during work;
the specific functional indexes of the positive pressure control room 6 are as follows:
firstly, the positive pressure value is lower than the positive pressure lower limit (25Pa), and the power supply of the electric control cabinet 605 is automatically cut off at the moment;
secondly, the positive pressure value is lower than the positive pressure lower limit (50Pa), a signal lamp of the 'pressure lower limit' is turned on, an explosion-proof audible and visual alarm 615 gives an alarm, and a signal is output to a verification control system to remind personnel to check whether the house body is sealed and the house door is closed;
when the positive pressure value is higher than the positive pressure upper limit (200Pa), the explosion-proof audible and visual alarm 615 gives an alarm and outputs a signal to a verification control system, and an exhaust electromagnetic valve in an exhaust port 611 with the electromagnetic valve is automatically opened (a manual exhaust valve is configured at the same time, and personnel can manually adjust the exhaust valve to perform manual exhaust when necessary);
and fourthly, automatically ventilating the original air in the positive pressure control chamber 6 before the system operates (the 'ventilation indication' signal lamp is on), and automatically entering a working state (the 'working indication' signal lamp is on) after ventilation is finished.
The operation of the positive pressure control system is as follows:
a) closing the positive pressure door (closing the positive pressure control room 6 and the buffer room 603, the inner door 601 and the outer door 602);
b) the power supply indicating signal lamp is on, which indicates that the power supply of the positive pressure control room 6 is normal;
c) pressing the button "start blower" and the signal lamp "blower running" indicates that the anti-explosion centrifugal blower 608 starts to deliver air to the positive pressure control chamber 6;
d) the 'ventilation indication' signal lamp is on, the mark enters a ventilation stage, the exhaust electromagnetic valve in the exhaust port 611 with the electromagnetic valve is automatically opened, the indication of the pressure gauge is observed, and the pressure balance in the positive pressure control chamber 6 is kept;
e) after the ventilation stage lasts for 30 minutes, a ventilation indication signal lamp is turned off, a work indication signal lamp is turned on to indicate that the system is in a working state, and when positive pressure is established (more than 50Pa and less than 200Pa), a power supply is provided for the verification control system and a power transmission permission signal is output to the verification control system;
f) when the pressure of the positive pressure control chamber 6 is lower than 50Pa, a 'pressure lower limit' signal lamp is on, and an explosion-proof audible and visual alarm 615 gives an alarm; at the moment, the automatic exhaust valve is closed, a low pressure signal is provided for the verification control system, and when the pressure in the positive pressure control chamber 6 is lower than 25Pa, the 'power transmission permission' signal is disconnected and the power supply of the verification control system is cut off;
g) when the pressure of the positive pressure control chamber 6 is higher than 200Pa, a signal lamp of the 'pressure upper limit' is on, an explosion-proof audible and visual alarm 615 gives an alarm, a high-pressure signal is provided for a verification control system, the automatic exhaust valve is opened, a person on duty needs to pay attention to observation, and the exhaust volume of the manual exhaust valve can be increased if the pressure continues to rise;
h) the 'stop fan' button is operated, the positive pressure control chamber 6 stops running, and the power supply of the verification control system is cut off;
i) after the machine is stopped, the machine is operated again, and the ventilation operation is required to be repeated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a high-pressure natural gas removes examination car, selects for use the repacking of standard van-type semitrailer to form its characterized in that: the trailer comprises a gooseneck type semi-trailer underframe (1), wherein a suspension system assembly connected with a tractor is arranged at the front end of the gooseneck type semi-trailer underframe (1), a semi-trailer axle assembly (2) is arranged at the rear side, supporting legs are arranged at the bottom, a van-type structure is arranged above the gooseneck type semi-trailer underframe (1), the semi-trailer axle assembly (2) adopts a rear double-shaft form, two tires are arranged on each side of each shaft, and an ABS (anti-lock brake system) and a gas path brake system are arranged, the van-type structure comprises a front positive pressure control chamber (6) and a rear wing type van body (7), the positive pressure control chamber (6) adopts a positive pressure ventilation design, an inlet adopts a double-door structure formed by an inner door (601) and an outer door (602), a handle and a ladder are arranged at the outer door (602), a closed buffer chamber (603) is formed between the inner door (601) and the outer door (602), and a PLC controller and an electric system connected with the PLC controller are matched in the positive pressure control chamber (6) in the buffer chamber (603), The system comprises an explosion-proof positive pressure control system, an illumination system and a verification control system, wherein a driving auxiliary system and an emergency stop button for controlling a gas path braking system are arranged in a positive pressure control chamber (6); a verification process system (12) is fixed inside the flying wing type compartment body (7) through a prying seat (11), the left and right side wings (8) of the verification process system are hinged to the top beam body of the flying wing type compartment body and opened and closed through a hydraulic oil cylinder (9), and the rear side face of the verification process system is of a double-door (10) structure;
the electrical system comprises an explosion-proof control box (604) arranged on the front wall inside the positive pressure control room (6) and an electrical control cabinet (605) arranged on the left wall inside the positive pressure control room (6), wherein the electrical control cabinet (605) is electrically connected with the explosion-proof control box (604) and adopts an interlocking control design, a PLC (programmable logic controller) and an I/O (input/output) data acquisition card, a communication board card, an Ethernet switch, a surge protector, a wiring terminal, a circuit breaker and a UPS (606) which are electrically connected with the PLC are arranged in the electrical system, the PLC is externally connected with an industrial computer and a printer and is connected with a natural gas verification station control system through a TCP/IP (transmission control protocol/Internet protocol), the industrial computer and the printer are arranged on a workbench (607) inside the positive pressure control room (6), and the UPS (606) is used as a standby power supply for supplying power to the PLC and the industrial computer under the emergency power-off condition, ensuring that certification data is not lost.
2. The high pressure natural gas mobile verification vehicle of claim 1, wherein: explosion-proof malleation control system includes malleation ventilation system and safety alarm system, malleation ventilation system includes explosion-proof control box (604), explosion-proof centrifugal fan (608) and takes solenoid valve gas vent (611), explosion-proof centrifugal fan (608) are installed in malleation control room (6) outside front wall right side to be connected with explosion-proof control box (604) electricity, and filter equipment (609) and explosion-proof air brake (610) are installed in proper order to its air inlet from outside to inside, take solenoid valve gas vent (611) to set up in malleation control room (6) outside front wall right side, its inside automatic discharge valve is connected with explosion-proof control box (604) electricity, explosion-proof control box (604) realize the inside and outside pressure detection of malleation control room (6) through the pressure detection unit of ann design to realize the automatic ventilation before starting through its inside control unit, the automatic allowable power transmission signal that provides of air exchange end, The positive pressure protection upper and lower limit is reported to the police and is required the above-mentioned safety interlocking function of outage with the automatic suggestion pressure is low, safety alarm system includes explosion-proof combustible gas detector (613), explosion-proof smoke detector (614) and explosion-proof audible-visual annunciator (615) that link to each other with the PLC controller, on the wall before explosion-proof combustible gas detector (613) and explosion-proof audible-visual annunciator (615) are all installed inside positive pressure control room (6), explosion-proof smoke detector (614) are installed on the inside roof of positive pressure control room (6).
3. The high pressure natural gas mobile verification vehicle of claim 1, wherein: the verification process system (12) comprises a metrological verification pipeline, the metrological verification pipeline comprises an upstream straight pipe section (1201) and a downstream straight pipe section (1211), the upstream straight pipe section (1201) is connected with a detected meter platform of a natural gas verification station, two detected ultrasonic or turbine flowmeters can be simultaneously verified in series, a DN80 verification pipeline, a DN150 verification pipeline and two DN300 verification pipelines which are mutually connected in parallel are arranged between the upstream straight pipe section (1201) and the downstream straight pipe section (1211), each verification pipeline is sequentially provided with an electric forced sealing ball valve (1207), a tube bundle type rectifier (1202), a standard turbine flowmeter (1208), an expansion joint (1209) and an electric flow regulating valve (1210) from front to back along the gas flow direction, the length of the front straight pipe section of the standard turbine flowmeter (1208) is required to be more than five times of the pipe diameter of the front pipe section, and the length of the rear straight pipe section is required to be more than three times of the pipe diameter of the standard turbine flowmeter, and the standard turbine flowmeter (1208) is matched with a high-precision Rosemont pressure transmitter and a temperature transmitter for compensating and correcting temperature and pressure for flow measurement, the pressure transmitter acquires pressure at the flowmeter body and is intensively installed at an internal installation plate (13) of the flying wing type carriage body (7), the temperature transmitter is installed in an interval with the length less than three times of the pipe diameter of the downstream straight pipe section of the flowmeter, two ends of a DN80 verification pipeline and a DN150 verification pipeline are respectively connected with an upstream straight pipe section (1201) and a downstream straight pipe section (1211) through DN150 junction pipes (1204), two ends of two DN300 verification pipelines are respectively connected with the upstream straight pipe section (1201) and the downstream straight pipe section (1211) through DN400 junction pipes (1205), a pipe bundle rectifier (1202) and a DN300 verification ultrasonic flowmeter (1203) are sequentially connected in series along the gas flow direction on the upstream straight pipe section (1201), and a pipe bundle rectifier (1202) and a standard turbine flowmeter (1208) of the DN80 verification pipeline are sequentially connected in series from front to back The device is connected with a DN80 checking ultrasonic flowmeter (1206) and a tube bundle rectifier (1202), the DN300 checking ultrasonic flowmeter (1203) and the DN80 checking ultrasonic flowmeter (1206) are used for checking that the length of a front straight tube section is more than ten times of the tube diameter of the front straight tube section, the length of a rear straight tube section is more than five times of the tube diameter of the rear straight tube section, the DN300 checking ultrasonic flowmeter (1203) and the DN80 checking ultrasonic flowmeter (1206) are matched with a high-precision Rosemont pressure transmitter and a temperature transmitter, the pressure transmitter is used for taking pressure from a flowmeter body and is intensively installed at an installation plate (13) inside the flying wing type carriage body (7), the temperature transmitter is installed in an interval of the downstream straight tube section of the flowmeter, which is less than three times of the tube diameter length, the inlet end of the upstream straight tube section (1201) and the tail end of the downstream straight tube section (1211) are respectively arranged at two sides of the rear end of the flying wing type carriage body (7), and DN150 collecting tubes (1204) and DN400 collecting tubes (1205) are fixed in the flying wing type carriage body (7) through upper layer and lower layer by pry seats (11), the PLC is connected with each component of the verification process system (12) through a cable, and the collection of flow, pressure and temperature and the opening and closing control of each valve are realized through the verification control system.
4. The high pressure natural gas mobile verification vehicle of claim 3, wherein: the verification process system (12) further comprises a component analysis pipeline, an automatic pressure balance pipeline and an automatic valve leakage checking pipeline, wherein the component analysis pipeline comprises a sampling valve (1212), one end of the sampling valve (1212) is connected with a downstream straight pipe section (1211), the other end of the sampling valve is connected to a gas chromatography analyzer (1213) arranged on the front side face of the winged van body (7), the gas chromatography analyzer (1213) is matched with a pretreatment system, a carrier gas and a standard gas cylinder, the pretreatment system is used for decompressing and filtering the sample gas, an exhaust port of the pretreatment system and the outlet end of the gas chromatography analyzer (1213) are connected with a first vent pipeline (1214), and the first vent pipeline (1214) is arranged at the upper right position on the inner side of the winged van body (7) and extends to the outside of the rear side face of the winged van body (7) to be communicated with the atmosphere;
the automatic pressure balancing pipeline comprises a gas taking pipeline (1215) with the pipe diameter of 12mm, one end of the gas taking pipeline (1215) is connected with a DN400 manifold (1205) at the upstream, the other end of the gas taking pipeline is sequentially connected with a first electromagnetic valve (1216) and a second electromagnetic valve (1217) in series, the outlet end of the second electromagnetic valve (1217) is respectively connected to the front position of a rear expansion joint (1209) of each verification pipeline standard turbine flowmeter (1208) through a third electromagnetic valve (1218) and is connected with a second emptying pipeline (1220) through a fourth electromagnetic valve (1219), and the second emptying pipeline (1220) is arranged at the upper left position of the inner side of the winged van body (7) and extends to the outside of the rear side face of the winged van body (7) to be communicated with the atmosphere;
the electric forced sealing ball valve (1207) is an Orbit forced sealing ball valve matched with a Rotork electric actuator, a BB type valve seat with the functions of discharging and monitoring the sealing performance of the valve seat is selected as the valve seat, the automatic valve leakage checking pipeline comprises a fifth electromagnetic valve (1221), one end of the fifth electromagnetic valve (1221) is connected to a gas taking pipeline (1215) from a leakage detection point between a first electromagnetic valve (1216) and a second electromagnetic valve (1217), the other end of the fifth electromagnetic valve is connected with the valve seat of the electric forced sealing ball valve (1207) through a sixth electromagnetic valve (1222), the fifth electromagnetic valve (1221) is connected with a second emptying pipeline (1220) through a pressure transmitter (1223), a seventh electromagnetic valve (1224) and a first manual valve (1225) which are connected in series, and the seventh electromagnetic valve (1224) and two sides of the first manual valve (1225) are connected with two ends of a second manual valve (1226) respectively;
the PLC is connected with each component of the component analysis pipeline, the automatic pressure balance pipeline and the automatic valve leakage checking pipeline through cables, and the collection of pressure and component information and the opening and closing control of each valve are realized through the verification control system.
5. The high pressure natural gas mobile verification vehicle of claim 1, wherein: dispose manual discharge valve and explosion-proof air conditioner (612) in malleation control room (6), explosion-proof air conditioner (612) adopt 1.5P components of a whole that can function independently wall-hanging air conditioner, and its inner machine is installed on the inside front wall of malleation control room (6), and outer machine is installed in malleation control room (6) outside front wall left side and is set up side by side with explosion-proof centrifugal fan (608), explosion-proof centrifugal fan (608) and explosion-proof air conditioner (612) outer machine pass through shutter protection case (615) and seal.
6. The high pressure natural gas mobile verification vehicle of claim 1, wherein: the lighting system comprises a set of explosion-proof fluorescent lamps (617), wherein the explosion-proof fluorescent lamps (617) are installed on the roof inside the positive pressure control room (6) and are electrically connected with the explosion-proof control box (604).
7. The high pressure natural gas mobile verification vehicle of claim 1, wherein: the supporting legs comprise four mechanical supporting legs (3) and four hydraulic supporting legs (4), the four mechanical supporting legs (3) are fixed on two sides of the neck of the gooseneck type semi-trailer chassis (1) and two sides of the rear of the semi-trailer bridge assembly (2) respectively, the four hydraulic supporting legs (4) are arranged at the positions of the gooseneck type semi-trailer chassis (1) below the positions of the four corners of the flying wing type box body (7) respectively, and the hydraulic supporting legs (4) are arranged on the outer sides of the mechanical supporting legs (2).
8. The high pressure natural gas mobile verification vehicle of claim 7, wherein: skirt border (5) position of gooseneck formula semi-mounted chassis (1) is provided with toolbox and hydraulic power unit, hydraulic power unit links to each other with hydraulic leg (4) and hydraulic cylinder (9), and its explosion-proof hydraulic pump passes through explosion-proof control box (604) and connects external power source to supply with the expansion and draw in of flank (8) about and the lift of four hydraulic leg (4) is realized to hydraulic oil through the explosion-proof hydraulic pump of remote controller control.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044196A (en) * | 1989-06-20 | 1991-09-03 | Japan Electronic Control Systems Co., Ltd. | Method and apparatus for detecting deterioration of a hot-wire type sucked air flow quantity-detecting device for an engine |
| CN1920498A (en) * | 2006-09-11 | 2007-02-28 | 朱天寿 | Online fluid flow detection device for natural gas flowmeter |
| CN202349591U (en) * | 2011-11-11 | 2012-07-25 | 何建华 | Calibration device of liquefied natural gas (LNG) dispenser |
| JP6063356B2 (en) * | 2013-07-04 | 2017-01-18 | 日立オートモティブシステムズ株式会社 | Calibration device for air flow measurement device and calibration method using the same |
| CN206488050U (en) * | 2016-12-14 | 2017-09-12 | 中国石油天然气集团公司 | Gas pipeline pressure flow hybrid control system integration skid-mounted unit |
| CN108709609A (en) * | 2018-07-09 | 2018-10-26 | 西安长庆科技工程有限责任公司 | A kind of natural gas big flow is real to flow calibrating installation and method |
| CN213779213U (en) * | 2021-04-30 | 2021-07-23 | 北京极达测控设备技术有限公司 | Movable full-automatic metering verification vehicle for high-pressure natural gas |
-
2021
- 2021-04-30 CN CN202110482471.0A patent/CN113155243B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044196A (en) * | 1989-06-20 | 1991-09-03 | Japan Electronic Control Systems Co., Ltd. | Method and apparatus for detecting deterioration of a hot-wire type sucked air flow quantity-detecting device for an engine |
| CN1920498A (en) * | 2006-09-11 | 2007-02-28 | 朱天寿 | Online fluid flow detection device for natural gas flowmeter |
| CN202349591U (en) * | 2011-11-11 | 2012-07-25 | 何建华 | Calibration device of liquefied natural gas (LNG) dispenser |
| JP6063356B2 (en) * | 2013-07-04 | 2017-01-18 | 日立オートモティブシステムズ株式会社 | Calibration device for air flow measurement device and calibration method using the same |
| CN206488050U (en) * | 2016-12-14 | 2017-09-12 | 中国石油天然气集团公司 | Gas pipeline pressure flow hybrid control system integration skid-mounted unit |
| CN108709609A (en) * | 2018-07-09 | 2018-10-26 | 西安长庆科技工程有限责任公司 | A kind of natural gas big flow is real to flow calibrating installation and method |
| CN213779213U (en) * | 2021-04-30 | 2021-07-23 | 北京极达测控设备技术有限公司 | Movable full-automatic metering verification vehicle for high-pressure natural gas |
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| CN113155243A (en) | 2021-07-23 |
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