CN201916283U - Pneumatic servo positive and negative pressure control device - Google Patents

Pneumatic servo positive and negative pressure control device Download PDF

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Publication number
CN201916283U
CN201916283U CN201020691222XU CN201020691222U CN201916283U CN 201916283 U CN201916283 U CN 201916283U CN 201020691222X U CN201020691222X U CN 201020691222XU CN 201020691222 U CN201020691222 U CN 201020691222U CN 201916283 U CN201916283 U CN 201916283U
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CN
China
Prior art keywords
valve
pressure
control
negative pressure
seat switch
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Expired - Fee Related
Application number
CN201020691222XU
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Chinese (zh)
Inventor
陈戈
尧建平
宋鹏飞
李洪文
张革命
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AVIC Aircraft Strength Research Institute
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AVIC Aircraft Strength Research Institute
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Priority to CN201020691222XU priority Critical patent/CN201916283U/en
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Publication of CN201916283U publication Critical patent/CN201916283U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a pneumatic device, in particular to a pneumatic servo positive and negative pressure control device, which comprises a display panel, a positive/negative change-over switch, an automatic/manual change-over switch, an emergency button, an air source pressure gauge, a pilot pressure gauge, a check valve, a filter pressure release valve, a pneumatic film valve, a large angle-seat valve, a small angle-seat valve, a pressure sensor, an air tank and a control circuit. By utilizing a pneumatic diaphragm proportional valve and the angle-seat switch valves to control pressure loading and pressure releasing respectively, the pneumatic servo positive and negative pressure control device has the advantages of high pressure control precision and low cost, and is capable of realizing positive pressure control and negative pressure control. In addition, the pneumatic servo positive and negative pressure control device is high in control precision, fast in speed, fine in following performance and safety, high in reliability and fine in operability, is capable of realizing switching over remote control and field manual control, and has higher actual application value.

Description

The positive negative pressure control apparatus of pneumatic servo
Technical field
The utility model relates to a kind of Pneumatic actuator, particularly about a kind of device that is used for the control of pneumatic servo positive/negative pressure.
Background technique
In the static(al)/fatigue test of complete aircraft structure, more and more higher to the requirement of precision, speed and the followability of each load(ing) point.In air tightness test projects such as fuel tank, passenger cabin, owing to be subjected to the influence of existing equipment, the effect of aspects such as its precision, speed and followability is poor.Therefore need to use the inflation platform to reduce the influence of equipment.
For positive air pressure load test project, prior art inflation platform is to be moved simultaneously by 4 2/2-way Proportional valves that use in parallel to finish applying of airtight load, the action of Proportional valve comprises inflates and exits and emergent release testpieces, all functions are all realized by the 2/2-way Proportional valve, the function of valve is more comprehensive, so its internal structure complexity, accurate, cost an arm and a leg, maintenance cost is higher, shortcomings such as the cycle is long, bring very big inconvenience to use, the performance in working life that should inflate platform simultaneously is shorter, using 5 years left and right sides after the time, its working stability, reliability is lower, and the performance performance is unstable in test in the recent period, influence the test progress, and this inflation platform do not possess the shortcoming of negative pressure test load capability.
And for negative air pressure load test project, so far still none overlaps complete servo loading equipemtn, in model test in the past, the negative air pressure load test is to adopt vacuum pump directly testpieces to be taken out negative pressure all the time, on-the-spot personal monitoring's pressure, the method that operator control vacuum-pump power supply realizes.This dependence loading method manually is being difficult to control aspect precision and the followability, test effect is poor, and the cycle is grown and there is bigger uncertain risk in testpieces.
Summary of the invention
The purpose of this utility model: a kind of pressure control precision height, the release time is fast, cost the is low positive negative pressure control apparatus of pneumatic servo are provided.
Technical solutions of the utility model: the positive negative pressure control apparatus of described pneumatic servo, it comprises display floater, just/the negative pressure throw over switch, the automatic/hand throw over switch, emergency button, the bleed pressure table, the pilot pressure table, one-way valve, filtering pressure reducing valve, the air bladder valve, big angle seat switch valve, little angle seat switch valve, pressure transducer, gas tank, control circuit, connecting pipeline, the control cable, wherein, be arranged on the air bladder valve between source of the gas and the testpieces and be arranged on testpieces and relief opening between big, arranged side by side mutually between the seat switch valve of little angle, guide's gas circuit of three is introduced the back by source of the gas and is entered gas tank by one-way valve, reduction valve and be communicated in the pilot pressure table after filtration again, structural pressure table and pressure transducer then are arranged in parallel on the pipeline between three and the testpieces, and described air bladder valve, size angle seat switch valve and pressure transducer all link to each other with control circuit by the control cable, described bleed pressure table is arranged on air bladder valve and big, before the one-way valve on guide's gas circuit of little angle seat switch valve, the pilot pressure table then is arranged on one-way valve, after gas tank and the filtering pressure reducing valve, and by filtering pressure reducing valve control, and between described gas tank access in parallel one-way valve and the filtering pressure reducing valve.
Described display floater be provided with the automatic/hand throw over switch that links to each other with control circuit and remote signal input interface, just/negative pressure throw over switch and emergency button.
Described big angle seat switch valve and little angle seat switch valve adopt mechanical structure open in usual.
Also be provided with the structural pressure table between described air bladder valve and the testpieces.
The signal of described remote signal input interface input is ± 50mA.
The beneficial effects of the utility model: the positive negative pressure control apparatus of the utility model pneumatic servo utilizes the method for pneumatic pool film Proportional valve and pilot pressure loading of angle seat switch valve difference and discharge degree, have pressure controling precision height, advantage that cost is low, and can realize the control of positive pressure-controlled and negative pressure, this operating console, the control accuracy height, speed and followability are good, and Security is good, the reliability height.And can realize the switching that telecontrol and on-site manual are controlled, good operability has bigger actual application value.
Description of drawings
Fig. 1 is the structural representation of positive negative pressure control apparatus one better embodiment of the utility model pneumatic servo.
Embodiment
The utility model is described in further detail below by embodiment:
See also Fig. 1, it is the structural representation of positive negative pressure control apparatus one better embodiment of the utility model pneumatic servo.The positive negative pressure control apparatus of described pneumatic servo comprise display floater, just/negative pressure throw over switch, automatic/hand throw over switch, emergency button, bleed pressure table, pilot pressure table, structural pressure table, one-way valve, filtering pressure reducing valve, air bladder valve, big angle seat switch valve, little angle seat switch valve, pressure transducer, remote signal interface, gas tank, control circuit, connecting pipeline, control cable.Wherein, be arranged on the air bladder valve between source of the gas and the testpieces and be arranged on testpieces and relief opening between two angle seat switch valves be the main member of the positive negative pressure control apparatus of described pneumatic servo.Arranged side by side mutually between described air bladder valve and big angle seat switch valve and the little angle seat switch valve, one end of air bladder valve connects and source of the gas, one end of big angle seat switch valve and little angle seat connects and relief opening, three's the other end all is connected in testpieces behind pressure transducer, and described air bladder valve, two angle seat switch valves and pressure transducer all link to each other with control circuit by the control cable.And also be provided with structural pressure table and the pressure transducer that is used to reflect the pressure size between described air bladder valve, two angle seat switch valves and the testpieces.Before described bleed pressure table is arranged on one-way valve on guide's gas circuit of air bladder valve and large and small angle seat switch valve, the pilot pressure table then is arranged on after one-way valve, gas tank and the filtering pressure reducing valve, and by filtering pressure reducing valve control, and between described gas tank access in parallel one-way valve and the filtering pressure reducing valve.Described display floater is the PLC TFT LCD, and it is provided with the automatic/hand throw over switch that links to each other with control circuit and remote signal input interface, just/negative pressure throw over switch and emergency button, with the convenient Comprehensive Control that realizes positive negative pressure.
In the positive negative pressure control apparatus of the utility model pneumatic servo, described air bladder valve and two angle seat switches are as pressure control valve, wherein, the air bladder valve is used to realize the pressurising to testpieces, and two angle seat switch valves are used to realize the release to testpieces, and realize coordination between them by control circuit board, finish servo ratio control to the airtight load in testpieces inside.
Wherein, what two angle seat switch latus rectums were less is little angle seat switch valve, be used for the adjustment between testpieces internal feedback pressure and the control command, when feedback pressure during near control command, needed gas flow is less, and little angle seat switch valve can satisfy traffic requirement, simultaneously because angle seat switch valve bore is less, have the fast characteristics of speed of response, thereby make testpieces internal pressure control accuracy improve, and speed and the also corresponding raising of followability.Described little angle seat switch cooperates pneumatic pool film Proportional valve to make structural pressure keep stable.When the pneumatic pool film Proportional valve work during of structural pressure value less than bid value, inflate, this valve quit work when the structural pressure value equaled bid value, was in closed condition; When structural pressure value during greater than bid value, little angle seat switch valve is opened exhaust, and this valve cuts out when the structural pressure value equals bid value.
And the bigger big angle seat switch valve of described latus rectum is to be used for fast pressure relief or the emergent release under big command status of testpieces inside, because its bore is bigger, be 1 times of little angle seat switch bore, have the big characteristics of flow, thereby make the testpieces pressure inside can obtain fast pressure relief, proof test spare safety.
In addition, the gas tank on affiliated guide's gas circuit makes pilot pressure keep stable, guarantees that pneumatic pool film Proportional valve and angle seat switch valve work sustainedly and stably.
The positive negative pressure control apparatus malleation of the utility model pneumatic servo control procedure is as follows: control gear is handled one tunnel ± 50mA drive signal of test coordination Loading Control System output earlier, converts 2 tunnel 0~10V voltage signals to.Wherein 0~10V voltage signal of 0~50mA corresponding conversion is used to control pneumatic pool film Proportional valve, to realize the function of inflation.0~-0~10V voltage signal of 50mA corresponding conversion, be used to control big angle seat switch valve and little angle seat switch valve, to realize the exhaust pressure relief.Wherein, the cut-in voltage of little angle seat switch valve is 0.1V (adjustable), and when controlling voltage greater than 0.1V, little angle seat switch valve is opened exhaust; The cut-in voltage of seat angle, big angle seat switch valve is 1V (adjustable), and when controlling voltage greater than 1V, two angle seat switch valves are opened exhaust simultaneously.
Two angle seat switch valves are opened the exhaust release simultaneously when emergency protection and sudden power.
The positive negative pressure control apparatus negative pressure of the utility model pneumatic servo control procedure is as follows: a road ± 50mA drive signal that control gear is coordinated Loading Control System output to test is handled, and converts 2 tunnel 0~10V voltage signals to.Wherein 0~-0~10V voltage signal of 50mA corresponding conversion, be used to control pneumatic pool film Proportional valve, to realize taking out the function of negative pressure.0~+ 0~10V voltage signal of 50mA corresponding conversion, be used to control two angle seat switch valves, to realize the tonifying Qi pressure relief.The cut-in voltage of little angle seat switch valve is 0.1V (adjustable), and when controlling voltage greater than 0.1V, little angle seat switch valve is opened tonifying Qi; The cut-in voltage of seat angle, big angle seat switch valve is 1V (adjustable), and when controlling voltage greater than 1V, two angle seat switch valves are opened tonifying Qi simultaneously.
When emergency protection and sudden power, two angle seat switch valves are opened the tonifying Qi release simultaneously.
In addition; two angle seat switch valves in the positive negative pressure control apparatus of the utility model pneumatic servo adopt mechanical structure open in usual; both as the discharge degree executive component; again as overpressure protector; thereby guarantee the operating console system at any time, under any reason powering-off state; in time discharge pressure in the testpieces, the safety of protection test part.
The remote signal interface of the positive negative pressure control apparatus of the utility model pneumatic servo is used to test Loading Control System remote operation control.The positive negative pressure control apparatus indoor design of while pneumatic servo feedback loop, the setting pressure sensor is formed inner closed-loop system, is used for on-site manual operation control.Switching between telecontrol and the field control, is to realize by the throw over switch of design on control panel.During telecontrol, by test coordinate Loading Control System control just/the negative pressure operating console finishes the telecontrol of pressurization, pressurize and exhaust release automatically; When manually controlling, be with liquid crystal digital text display input mode setting pressure bid value on the operating console panel, operating console is controlled automatically according to difference between bid value and the value of feedback and is finished pressurization and exhaust release, stops pressurization and exhaust release when reaching setting value automatically.
In addition, the positive negative pressure control apparatus of the utility model pneumatic servo is taked safety design, it sets the overpressure protection CLV ceiling limit value with liquid crystal digital text display input mode on the operating console panel, prescribe a time limit when the testpieces internal pressure value surpasses protection, and operating console quits work and release automatically; The design emergency button guarantees to inflate platform fast pressure relief under case of emergency, quits work.
Just/the negative pressure operating console designs filtering device on circuit, abate the noise, the interference of vibration and small-signal, improves control accuracy and stability.
In sum the positive negative pressure control apparatus of the utility model pneumatic servo utilize pneumatic pool film Proportional valve and angle seat switch valve respectively pilot pressure load and the method for discharge degree, have pressure controling precision height (control accuracy is better than 1%), flow (can reach 178m greatly 3/ min), advantage that cost is low.Utilize the bivalve Parallel Control discharge degree of large and small angle seat switch valve, improved followability, reduced unloading time, unloading response needed time was reduced to less than 1 second from 2.5 seconds.And have the accurate Loading Control ability of air tightness test part internal pressure, can realize positive pressure-controlled and negative pressure control, the control accuracy height, speed and followability are good, and small design pressure-stored tank on the air guide road formerly, make pilot pressure keep stable, guarantee that pneumatic pool film Proportional valve and angle seat switch valve work the reliability height sustainedly and stably.Shu Ru control signal is ± 50mA simultaneously; coordinate the Loading Control System compatibility with test; and the overpressure protection upper limit of built-in PLC setting and the emergency cock on the control panel; and the safety protection of angle open in usual seat switch valve design, from the circuit to mechanical structure on multiple protective measure effectively, guarantee that operating console is at any time; and under any reason powering-off state; in time discharge pressure in the testpieces, reduced empirical risk, improved Security.Take on-site manual operation control and experiment control system remote auto control dual mode simultaneously, can insert experiment control system, realize remote auto control, also can the ablation experiment control system, realize the on-site manual pressure control, operation control complete function, convenience.Adopt the servo control technique of electricity, gas phase combination, simplified control mode, saved system resource, improved reliability.And the positive negative pressure control apparatus of the utility model pneumatic servo successfully is applied among the actual tests, and this operating console system works is reliable and stable, it is accurate, easy and simple to handle to load, and satisfies actual static(al)/fatigue test requirement, reached re-set target.

Claims (5)

1. positive negative pressure control apparatus of described pneumatic servo, it is characterized in that: comprise display floater, just/the negative pressure throw over switch, the automatic/hand throw over switch, emergency button, the bleed pressure table, the pilot pressure table, one-way valve, filtering pressure reducing valve, the air bladder valve, big angle seat switch valve, little angle seat switch valve, pressure transducer, gas tank, control circuit, wherein, be arranged on the air bladder valve between source of the gas and the testpieces and be arranged on testpieces and relief opening between big, arranged side by side mutually between the seat switch valve of little angle, guide's gas circuit of three is introduced the back by source of the gas and is entered gas tank by one-way valve, reduction valve and be communicated in the pilot pressure table after filtration again, structural pressure table and pressure transducer then are arranged in parallel on the pipeline between three and the testpieces, and described air bladder valve, size angle seat switch valve and pressure transducer all link to each other with control circuit by the control cable, described bleed pressure table is arranged on air bladder valve and big, before the one-way valve on guide's gas circuit of little angle seat switch valve, the pilot pressure table then is arranged on one-way valve, after gas tank and the filtering pressure reducing valve, and by filtering pressure reducing valve control, and between described gas tank access in parallel one-way valve and the filtering pressure reducing valve.
2. according to the positive negative pressure control apparatus of the described pneumatic servo of claim 1, it is characterized in that: described display floater be provided with the automatic/hand throw over switch that links to each other with control circuit and remote signal input interface, just/negative pressure throw over switch and emergency button.
3. according to the positive negative pressure control apparatus of the described pneumatic servo of claim 2, it is characterized in that: described big angle seat switch valve and little angle seat switch valve adopt mechanical structure open in usual.
4. according to the positive negative pressure control apparatus of each described pneumatic servo of claim 1 to 3, it is characterized in that: also be provided with the structural pressure table between described air bladder valve and the testpieces.
5. according to the positive negative pressure control apparatus of the described pneumatic servo of claim 4, it is characterized in that: the signal of described remote signal input interface input is ± 50mA.
CN201020691222XU 2010-12-31 2010-12-31 Pneumatic servo positive and negative pressure control device Expired - Fee Related CN201916283U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020691222XU CN201916283U (en) 2010-12-31 2010-12-31 Pneumatic servo positive and negative pressure control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020691222XU CN201916283U (en) 2010-12-31 2010-12-31 Pneumatic servo positive and negative pressure control device

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103104810A (en) * 2013-01-24 2013-05-15 中国科学院自动化研究所 Positive / negative pressure gas circuit generating device
CN103499986A (en) * 2013-10-16 2014-01-08 中国科学院自动化研究所 Multichannel vacuum positive and negative pressure output control device
CN103631282A (en) * 2013-12-04 2014-03-12 中国飞机强度研究所 Pneumatic servo pressurization controller
CN109596437A (en) * 2019-01-14 2019-04-09 中国工程物理研究院化工材料研究所 The loading force Control System Design method of the accurate loading simulator of static(al)
CN110032223A (en) * 2019-04-18 2019-07-19 安徽皖仪科技股份有限公司 High-precision positive/negative-pressure is double to apply automatically controlled regulator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103104810A (en) * 2013-01-24 2013-05-15 中国科学院自动化研究所 Positive / negative pressure gas circuit generating device
CN103104810B (en) * 2013-01-24 2015-10-28 中国科学院自动化研究所 A kind of positive/negative pressure gas channel generating means
CN103499986A (en) * 2013-10-16 2014-01-08 中国科学院自动化研究所 Multichannel vacuum positive and negative pressure output control device
CN103499986B (en) * 2013-10-16 2016-06-08 中国科学院自动化研究所 Multichannel vacuum positive and negative pressure output-controlling device
CN103631282A (en) * 2013-12-04 2014-03-12 中国飞机强度研究所 Pneumatic servo pressurization controller
CN109596437A (en) * 2019-01-14 2019-04-09 中国工程物理研究院化工材料研究所 The loading force Control System Design method of the accurate loading simulator of static(al)
CN109596437B (en) * 2019-01-14 2021-04-02 中国工程物理研究院化工材料研究所 Design method of loading force control system of static force accurate loading simulation device
CN110032223A (en) * 2019-04-18 2019-07-19 安徽皖仪科技股份有限公司 High-precision positive/negative-pressure is double to apply automatically controlled regulator

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20110803

Termination date: 20161231