CN103091037A - On-line verifying device of pneumatic wide-range pressure transmitter - Google Patents

On-line verifying device of pneumatic wide-range pressure transmitter Download PDF

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Publication number
CN103091037A
CN103091037A CN201110330698XA CN201110330698A CN103091037A CN 103091037 A CN103091037 A CN 103091037A CN 201110330698X A CN201110330698X A CN 201110330698XA CN 201110330698 A CN201110330698 A CN 201110330698A CN 103091037 A CN103091037 A CN 103091037A
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CN
China
Prior art keywords
valve
pneumatic
booster pump
hydraulic
piston
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201110330698XA
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Chinese (zh)
Inventor
毛惠律
朱宝华
陈立荣
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Shanghai Baosteel Equipment Maintenance Co Ltd
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Shanghai Baosteel Equipment Maintenance Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Shanghai Baosteel Equipment Maintenance Co Ltd filed Critical Shanghai Baosteel Equipment Maintenance Co Ltd
Priority to CN201110330698XA priority Critical patent/CN103091037A/en
Publication of CN103091037A publication Critical patent/CN103091037A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an on-line verifying device of a pneumatic wide-range pressure transmitter. The verifying device comprises a pneumatic booster pump, a hydraulic jar, an inlet valve, a flow control valve, a reversing valve, a stop valve, a micro-metering valve and two one-way valves, wherein the inlet valve and the two one-way valves are sequentially connected in series and then connected with an input port of the pneumatic booster pump, a hydraulic pressure inlet of the pneumatic booster pump is connected with an output end of the hydraulic jar, an input end of the hydraulic jar is connected with an output end of the flow control valve, the reversing valve is respectively connected with an input end of the flow control valve, a hydraulic pressure outlet of the pneumatic booster pump and one end of the stop valve and switches over the input end of the flow control valve and the hydraulic pressure outlet of the pneumatic booster pump, and the connector of the micro-metering valve is connected with the other end of the stop valve. The on-line verifying device of the pneumatic wide-range pressure transmitter overcomes the defects of the traditional unifying device, completely fulfills the on-line verification of the pneumatic wide-range pressure transmitter, is simple in structure and easy to carry, saves time and labor in verifying process, completely eradicates the leakage of the verifying device, improves verifying efficiency, and guarantees verifying precision.

Description

Pneumatic wide-range pressure unit on-line testing device
Technical field
The present invention relates to a kind of pneumatic wide-range pressure unit on-line testing device.
Background technology
Pneumatic wide-range pressure unit is widely used in as in the hydraulic control systems such as power plant, chemical industry, energy oxygen, and its range is that mesohigh is about 2~100MPa; There is certain difficulty in the on-line testing of pneumatic wide-range pressure unit, it is mainly to rely on manually to set up the mesohigh test pressure and have certain difficulty, that laboratory piston-type pressure tester is moved to field-checking in the past, waste time and energy very much, Laboratory Instruments is used at the scene and is difficult to guarantee service precision, therefore also has and tears back transmitter open the laboratory verification, and then return dress, greatly reduce the verification efficient of transmitter, affected the normal operation of hydraulic control system.
Be used at present at the portable calibration equipment of wire transmitter verification, the inflator tube type of employing pressuring method being arranged, its range 0-2MPa, but just seem very difficult when in practical application, pressure being increased to greater than 1.5MPa; Adopt pincerlike manually pressuring method, its range 1-4MPa is when pressurization surpasses 1.5MPa, singlehanded grip is required great effort very much, singlehanded pressurization is difficult to realize the verification of 4MPa, and adopts the both hands pressurization very inconvenient, therefore implements quite inconvenience of wide-range pressure unit verification; Also there is the lever type hand of employing to press the pump pressure calibration equipment, this device range 0-30MPa, its volume is relatively large, be not easy to carry, next is that internal pipeline is narrow, the aperture is 1~3mm, and when having foreign material in the process pipe as tested transmitter, during verification, foreign material easily suck the standard scale pipeline and easily cause obstruction.
Above-mentioned each calibration equipment adopts manual pressure not add to fully greater than 2MPa, and feel is required great effort very much when adding to greater than 2MPa, can not satisfy the verification range of wide-range pressure unit; While is for the equal Shortcomings of revesal verification of transmitter, control to each checkpoint is more difficult, its revesal checking procedure is only controlled checkpoint by single relief valve, and the straight-through atmosphere of relief valve, pressure releasing process is easily crossed checkpoint, do not meet the vertification regulation requirement, the stable operation of checkpoint relies on experience fully; Secondly the seal of calibration equipment is withstand voltage has problems with durability, pressurizing piston, fine setting piston adopt the sealing of individual layer O type circle substantially, in addition when the outside Yan Kou wearing and tearing of piston rod or pore bulge, the Manual pressurizing operation causes the horizontal line of internal piston and piston cylinder inwall to produce angle and causes leakage, therefore calibration equipment uses bad seals after a period of time continuously, leaks serious.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of pneumatic wide-range pressure unit on-line testing device, this device has overcome the defective of traditional calibration equipment, satisfy the on-line testing of pneumatic wide-range pressure unit fully, simple in structure being easy to carry, checking procedure is time saving and energy saving, stop the leakage of calibration equipment, improved verification efficient, guaranteed checking precision.
for solving the problems of the technologies described above, the pneumatic wide-range pressure unit of the present invention on-line testing device comprises Pneumatic booster pump, hydraulic tank, gas admittance valve, flowrate control valve, reversal valve, stop valve, micrometering valve and two retaining valves, described gas admittance valve with are connected a retaining valve and are connected in series successively the described Pneumatic booster pump gas input port of rear connection, the hydraulic inlet of described Pneumatic booster pump connects described hydraulic tank output terminal, described hydraulic tank input end connects described flowrate control valve output terminal, described reversal valve connects respectively described flowrate control valve input end, the outlet of Pneumatic booster pump hydraulic pressure and stop valve one end also switch the flowrate control valve input end and the outlet of Pneumatic booster pump hydraulic pressure, described micrometering valve interface connects the described stop valve other end.
Further, the spool of above-mentioned retaining valve is the V-type cone spool.
further, above-mentioned micrometering valve comprises valve body, be located at the end cap at valve body two ends, handwheel, screw rod, piston, friction top, globe bearing and V-seal spare, described screw rod penetrates described valve body one side end cap and is threaded, described handwheel is located at described screw rod one end, described piston is positioned at described valve body, the described screw rod other end connects described piston one side by described globe bearing, described V-seal spare is located at described piston opposite side outer ring and between piston opposite side outer ring and valve interior wall, described friction top is located at described piston opposite side and is fixed described V-seal spare by bolt, described valve body front end is provided with interface.
Further, the medium in above-mentioned hydraulic tank is water.
because the pneumatic wide-range pressure unit of the present invention on-line testing device has adopted technique scheme, be that this calibration equipment comprises Pneumatic booster pump, hydraulic tank, gas admittance valve, flowrate control valve, reversal valve, stop valve, micrometering valve and two retaining valves, gas admittance valve with are connected a retaining valve and are connected in series successively rear connection Pneumatic booster pump gas input port, the hydraulic inlet of Pneumatic booster pump connects the hydraulic tank output terminal, hydraulic tank input end connection traffic operation valve output terminal, reversal valve is connection traffic operation valve input end respectively, the outlet of Pneumatic booster pump hydraulic pressure and stop valve one end also switch the flowrate control valve input end and the outlet of Pneumatic booster pump hydraulic pressure, the micrometering valve interface connects the stop valve other end.This device has overcome the defective of traditional calibration equipment, satisfies the on-line testing of pneumatic wide-range pressure unit fully, simple in structure being easy to carry, and checking procedure is time saving and energy saving, has stopped the leakage of calibration equipment, has improved verification efficient, has guaranteed checking precision.
Description of drawings
The present invention is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the pneumatic wide-range pressure unit of the present invention on-line testing device connection diagram;
Fig. 2 is the structural representation of retaining valve in this calibration equipment;
Fig. 3 is the structural representation of micrometering valve in this calibration equipment.
Embodiment
as shown in Figure 1, the pneumatic wide-range pressure unit of the present invention on-line testing device comprises Pneumatic booster pump 1, hydraulic tank 2, gas admittance valve 3, flowrate control valve 5, reversal valve 6, stop valve 7, micrometering valve 8 and two retaining valves 4, described gas admittance valve 3 connects described Pneumatic booster pump 1 gas input port with being connected after a retaining valve 4 is connected in series successively, the hydraulic inlet of described Pneumatic booster pump 1 connects described hydraulic tank 2 output terminals, described hydraulic tank 2 input ends connect described flowrate control valve 5 output terminals, described reversal valve 6 connects respectively described flowrate control valve 5 input ends, Pneumatic booster pump 1 hydraulic pressure outlet and stop valve 7 one ends also switch flowrate control valve 5 input ends and Pneumatic booster pump 1 hydraulic pressure outlet, described micrometering valve 8 interfaces connect described stop valve 7 other ends.
As shown in Figure 2, further, the spool of above-mentioned retaining valve is V-type cone spool 42.this retaining valve adopts V-type cone spool 42 to replace the steel ball spool of traditional retaining valve, V-type cone spool 42 is positioned at retaining valve valve body 41, back-up ring 44 embeds retaining valve valve body 41 inwalls, spring 43 two ends are respectively against back-up ring 44 and V-type cone spool 42, gas enters rear pushing tow V-type cone spool 42 from the input end of retaining valve valve body 41, V-type cone spool 42 moves after overcoming spring 43 acting forces, gas flows out from retaining valve valve body 41 output terminals, this retaining valve oppositely can't conducting, V-type cone spool 42 has been guaranteed the sealing property of retaining valve, overcome the not good defective of steel ball valve core check valve sealing property.
as shown in Figure 3, further, above-mentioned micrometering valve comprises valve body 83, be located at the end cap 87 and 91 at valve body 83 two ends, handwheel 81, screw rod 82, piston 89, friction top 86, globe bearing 84 and double-deck V-seal spare 85, described screw rod 82 penetrates described valve body 83 1 side end caps 91 and is threaded, described handwheel 81 is located at described screw rod 82 1 ends, described piston 89 is positioned at described valve body 83, described screw rod 82 other ends connect described piston 89 1 sides by described globe bearing 84, described double-deck V-seal spare 85 is located at described piston 89 opposite side outer rings and between piston 89 opposite side outer rings and valve body 83 inwalls, described friction top 86 is located at described piston 89 opposite sides and is fixed described double-deck V-seal spare 85 by bolt 88, described valve body 83 front ends are provided with interface 90.This micrometering valve adopts double-deck V-seal spare 85 packed-pistons 89 and valve body 83; play good sealing effectiveness; screw rod 82 is connected by globe bearing 84 with piston 89; when turning, screw rod 82 is difficult for driving piston 89 rotations; guarantee sealing effectiveness; simultaneously under screw rod 82 and end cap 91 wear conditions, guarantee moving horizontally of piston 89, do not affect the deflection of piston 89 and produce sealing problem.This micrometering valve by handwheel 81 and screw rod 82 drive pistons 89 reaches or after move the output pressure that can change this calibration equipment, play pressure controlled effect.
Further, the medium in above-mentioned hydraulic tank 2 is water.Hydraulic tank 2 is provided with filling opening, is convenient to replenishing of hydraulic tank 2 interior media.This can keep clean environment to the scene, preventing because the verification leakage of oil pollutes or fire-fighting harm, and is not subjected to the restriction of processing medium.
Each parts of this calibration equipment can adopt box-type to install, tank surface is respectively equipped with the connection standard table and by the interface of school transmitter, this interface connects the other end of this calibration equipment stop valve, rely on the pulley of bottom half can carry out effectively easily mobile, conveniently move to the production scene and carry out the on-line testing of transmitter, can become portable pressure checking and inspection platform.This calibration equipment work range is 0~100MPa, and pressure fine setting fineness is 100Pa, and the system pressure leakage rate is 10Pa/min, and system pressure Time Created is 50MPa/15~20s, and the input bleed pressure is 0.5~0.6MPa.
when the positive stroke verification of transmitter, first with standard scale, tested transmitter is in place by the corresponding interface of tank surface, determine the flowrate control valve closed condition, again 0.5~0.6MPa source of the gas is connected gas admittance valve, open gas admittance valve, two retaining valve conductings, Pneumatic booster pump begins to start, determine the tangential Pneumatic booster pump of reversal valve, open stop valve, according to tested transmitter calibrating point, make the pressure rising to calibrating point 98%, close stop valve, adopt the fine setting pressure regulating valve, after making pressure rise to the calibrating point, press vertification regulation and stablize a period of time, determine to record checking data after leaking, opening stop valve, regulate micrometering valve and rise to second calibrating point subsequently, repeats the checking procedure of the first calibrating point, until the full scale verification of tested transmitter.
During tested transmitter revesal verification, with reversal valve slipstream control valve, the slow circumvolve flowrate control valve, the controlled pressure release rate to calibrating point 102%, is closed stop valve with pressure drop, adopt the fine setting pressure regulating valve, make Pressure Drop to the calibrating point, press vertification regulation and stablize a period of time, determine to record checking data after leaking; Opening stop valve, adjust flux operation valve make Pressure Drop to the second a calibrating point, repeat the checking procedure of a calibrating point, until the verification of tested transmitter revesal is complete.
In this device, Pneumatic booster pump is main core component, it need not Manual pressurizing just can increase to 100MPa by the hydraulic medium pressure that 0.5~0.6MPa gas of input is inputted the self-hydraulic tank, satisfy the verification range of mesohigh transmitter, move on the gas push supercharge pump piston of Pneumatic booster pump by input, move the medium of opening in supercharge pump hydraulic inlet ball valve suction hydraulic tank on the supercharge pump piston, then piston is moved down by gas push and closes the hydraulic inlet ball valve, opens the hydraulic pressure vent ball valve, export highly pressurised liquid, reach the purpose of hydraulic medium supercharging.0.5~0.6MPa gas plays dual sealing functions by two series connection retaining valve input Pneumatic booster pumps.In this device, stop valve, reversal valve and micrometering valve are adopted in the release of verification pressure, and earth pressure release can obtain stable control, and verification is difficult for crossing checkpoint for the transmitter revesal.In this device, earth pressure release adopts flowrate control valve, makes earth pressure release be able to stable operation, has further guaranteed the checking precision of tested transmitter.

Claims (4)

1. pneumatic wide-range pressure unit on-line testing device, it is characterized in that: this calibration equipment comprises Pneumatic booster pump, hydraulic tank, gas admittance valve, flowrate control valve, reversal valve, stop valve, micrometering valve and two retaining valves, described gas admittance valve with are connected a retaining valve and are connected in series successively the described Pneumatic booster pump gas input port of rear connection, the hydraulic inlet of described Pneumatic booster pump connects described hydraulic tank output terminal, described hydraulic tank input end connects described flowrate control valve output terminal, described reversal valve connects respectively described flowrate control valve input end, the outlet of Pneumatic booster pump hydraulic pressure and stop valve one end also switch the flowrate control valve input end and the outlet of Pneumatic booster pump hydraulic pressure, described micrometering valve interface connects the described stop valve other end.
2. pneumatic wide-range pressure unit on-line testing device according to claim 1, it is characterized in that: the spool of described retaining valve is the V-type cone spool.
3. pneumatic wide-range pressure unit on-line testing device according to claim 1, it is characterized in that: described micrometering valve comprises valve body, be located at the end cap at valve body two ends, handwheel, screw rod, piston, friction top, globe bearing and V-seal spare, described screw rod penetrates described valve body one side end cap and is threaded, described handwheel is located at described screw rod one end, described piston is positioned at described valve body, the described screw rod other end connects described piston one side by described globe bearing, described V-seal spare is located at described piston opposite side outer ring and between piston opposite side outer ring and valve interior wall, described friction top is located at described piston opposite side and is fixed described V-seal spare by bolt, described valve body front end is provided with interface.
4. pneumatic wide-range pressure unit on-line testing device according to claim 1 is characterized in that: the medium in described hydraulic tank is water.
CN201110330698XA 2011-10-27 2011-10-27 On-line verifying device of pneumatic wide-range pressure transmitter Pending CN103091037A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104132776A (en) * 2014-08-15 2014-11-05 武汉市天虹仪表有限责任公司 Gas pressure generating device for pressure calibration
CN112362552A (en) * 2020-10-30 2021-02-12 中国石油大学(北京) Shale matrix permeability determination device and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2639869Y (en) * 2003-06-10 2004-09-08 北京市海淀区中航机电研究所 Electric pressure checking table
JP2004309421A (en) * 2003-04-10 2004-11-04 Ohte Giken Inc Pressure variable controller and pressure variable control method
KR100537445B1 (en) * 2001-12-28 2005-12-19 가부시키가이샤 후지킨 Pressure sensor, pressure controller and temperature drift corrector of pressure type flow controller
CN2828778Y (en) * 2005-08-25 2006-10-18 北京康斯特仪表科技有限公司 Middle pressure gas pressure adjusting decice
CN101685038A (en) * 2008-09-25 2010-03-31 上海宝钢设备检修有限公司 Portable pneumatic high/medium voltage transducer checking device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100537445B1 (en) * 2001-12-28 2005-12-19 가부시키가이샤 후지킨 Pressure sensor, pressure controller and temperature drift corrector of pressure type flow controller
JP2004309421A (en) * 2003-04-10 2004-11-04 Ohte Giken Inc Pressure variable controller and pressure variable control method
CN2639869Y (en) * 2003-06-10 2004-09-08 北京市海淀区中航机电研究所 Electric pressure checking table
CN2828778Y (en) * 2005-08-25 2006-10-18 北京康斯特仪表科技有限公司 Middle pressure gas pressure adjusting decice
CN101685038A (en) * 2008-09-25 2010-03-31 上海宝钢设备检修有限公司 Portable pneumatic high/medium voltage transducer checking device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104132776A (en) * 2014-08-15 2014-11-05 武汉市天虹仪表有限责任公司 Gas pressure generating device for pressure calibration
CN104132776B (en) * 2014-08-15 2016-08-31 武汉市天虹仪表有限责任公司 A kind of gas pressure generating means for pressure calibration
CN112362552A (en) * 2020-10-30 2021-02-12 中国石油大学(北京) Shale matrix permeability determination device and method

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Application publication date: 20130508

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