CN1291223C - Pulse valve performance detecting device and method - Google Patents
Pulse valve performance detecting device and method Download PDFInfo
- Publication number
- CN1291223C CN1291223C CN 200410060737 CN200410060737A CN1291223C CN 1291223 C CN1291223 C CN 1291223C CN 200410060737 CN200410060737 CN 200410060737 CN 200410060737 A CN200410060737 A CN 200410060737A CN 1291223 C CN1291223 C CN 1291223C
- Authority
- CN
- China
- Prior art keywords
- pressure
- pulse valve
- pulse
- winding
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a pulse valve performance detecting device and a method. The device is composed of a compressor 1, an air storage tank 2, an oil-water separator 3, a pressure reducing valve 4, a pressure-stabilizing air bag 5, a pulse valve 6 to be detected, an injection pipe 7, a pressure sensor 8, a standard target 9, an acceleration sensor 10, a data collection card 11 and a computer 12, wherein the injection performance of the pulse valve can be detected and measured by measuring the pressure of the wall of the injection pipe 7, acceleration generated from the standard target 9 and the pressure change of the pressure-stabilizing air bag 5. The present invention has the advantages of comprehensive and complete detection content and good universality. Scientific references are provided for designing and selecting the pulse valve, and that economic loss is caused by improper selection is prevented. The detecting device is favorable for a pulse bag type dust collector to achieve an optimal ash removal effect.
Description
One, affiliated technical field
The present invention relates to a kind of pulse valve device for detecting performance and adopt this device paired pulses valve to carry out the method for Performance Detection.Pulse valve of the present invention is the diaphragm valve that is used for a kind of pressure gas snap-out release of bag dust-collector pulse jetting cleaning in the environmental protection, and its open and close are that the energising of the solenoid valve that is mounted thereon by control realizes with outage.
Two, technical background
Sack cleaner be the filter bag that utilizes filter cloth to be made into filter with separate dusty gas in a kind of cleaner of dust, have and filter and two kinds of groundwork states of deashing.During filtration, dust is caught to combine in the filter bag outside surface, and filtration resistance just need be carried out deashing after being increased to certain numerical value gradually, to keep fly-ash separator continuous filtration ability.A kind of common and effective purge mode is a pulse jetting deashing, promptly utilize the pulse valve fast opening and closing with the pressure gas snap-out release in the gas bag to the filter bag inner chamber, the bulging distortion by filter bag moment comes off the dust filter cake on filter bag surface, reaches the deashing purpose.As seen, the effect of pulse valve is actually a kind of diaphragm switch of quick opening and closing pressure gas passage, is the core component of pulse jetting deashing device, and the quality of its performance is directly connected to ash-removal effect.
The performance of pulse valve mainly shows the size of the air supply that moment provides and aspects such as pressure peak that causes at the filter bag inner chamber and pressure climbing speed.There is significant difference in its jetting performance of the pulse valve of different structure and model, at present, pulse valve is various in style on the market, caliber size differs, structure also is not quite similar, the performance parameter of pulse valve can only be carried out performance estimation according to on-the-spot result of use, lacks reliable pulse valve performance evaluation means and device, is difficult to provide accurately, quantitatively the performance parameter of pulse valve.Therefore, in the face of the pulse valve that numerous different sizes, structure, different manufacturers are produced, the designer has certain blindness in the selection of carrying out soot cleaning system configuration design and operational factor, often cause the undesired of equipment operation, dust removing effects is poor, waste investment, the required energy consumption height of deashing.Because the performance parameter of paired pulses valve is understood not enough, the user also runs into obstacle when using and manage cleaner.
Three, summary of the invention
In order to overcome the deficiency that pulse valve performance in the present bag-type dust collecting equipment can only qualitatively judge according to engineering result of use and experience, the blindness when avoiding selecting for use; Avoid the designer soot cleaning system when design configuration for want of scientific basis cause pulse valve to select improper and bring economically loss.The present invention sets up a cover pulse valve performance testing device, and provide a kind of method of testing, various types of pulse valves are carried out Performance Detection and evaluation, provide the best service condition and the applicable situation thereof of detected pulse valve, help pulse bag type dust collector and have best ash-removal effect and operation steadily in the long term.
Technical solution of the present invention is:
1. set up the device for detecting performance of a cover pulse valve
The index of estimating pulse valve performance quality is: pulse valve top hole pressure peak value, top hole pressure climbing speed, blowing gas flow, blowing gas momentum, pulse valve opening and closing time and pulse valve resistance.
The performance index of the pulse valve of different types and specification are different, only test on same pick-up unit, could differentiate and estimate the quality of pulse valve performance.The present invention proposes a kind of pulse valve device for detecting performance and method thereof, can realize the performance index of above pulse valve are detected and estimate.Pick-up unit has constituted a complete test macro, comprises four parts: pressurized air air feed, pulse jet, winding-up airstream data are gathered and data processing.
The pressurized air air feed is made up of air compressor machine, gas-holder, oil-water separator, reduction valve, and its effect provides and storage high pressure pressurized air, and carries out the deoiling, dewatering purified treatment, finally presses air feed parameter request (pressure, flow) supply pressurized air.
Pulse jet by the voltage stabilizing gas bag, examined pulse valve and winding-up pipe is formed, its effect is to open fast by pulse valve the pressurized air in the voltage stabilizing gas bag is ejected from the pipe of jetting fast.
The collection of winding-up airstream data is made up of pressure transducer, target, acceleration transducer, data collecting card, and its effect is the acceleration when detecting the pressure of winding-up pipe, voltage stabilizing gas bag and target motion.
Data processing is mainly finished by computing machine.
Each position component annexation of pulse valve device for detecting performance is as follows:
Air compressor machine, gas-holder, oil-water separator are connected with the pipeline of calming the anger with the voltage stabilizing gas bag, on the pipeline between oil-water separator and the voltage stabilizing gas bag reduction valve are set; Examined pulse valve under pulse jet pipe and target are set, winding-up pipe and target centering have aperture on the tube wall of winding-up pipe, target is arranged on the frame, the removable design of frame is so that adjust the position; Tapping with the winding-up pipe on the voltage stabilizing gas bag is provided with pressure transducer respectively, acceleration transducer is set on target, pressure transducer is connected with the electrical control signal wire with the input end of data collecting card with acceleration transducer, the output terminal of data collecting card is connected with computing machine, computing machine also with examined pulse valve on solenoid valve be connected with control signal wire, like this, computing machine is with regard to winding-up, data acquisition, storage, data processing and the graphic plotting of may command pulse valve.
Have aperture on the tube wall of winding-up pipe, pressure transducer is installed, can realize the measurement of physical quantitys such as pulse valve top hole pressure peak value, pressure climbing speed, opening and closing time, resistance.
The voltage stabilizing gas bag is a combined type, is promptly combined by main part and auxilliary body portion, and the two connects with flange, is examined pulse valve and is installed on the auxilliary body.Each test subject partial fixing is constant, auxilliary body portion is then different with the installation requirement (mounting seat and installation dimension) of different structure and different size pulse valve, the pulse valve that these characteristics can satisfy various types all can carry out performance test and evaluation on same proving installation, promptly have the characteristics of versatility.
Target is set, and on target, acceleration transducer is installed, by the measurement of target acceleration magnitude being weighed and characterized the relative size of pulse valve winding-up momentum.The size of target, shape and material are not limit.
Control for the unlatching that realizes the paired pulses valve better, time-delay, pass closed procedure is provided with Programmable Logic Controller (PLC) between computing machine and pulse valve.
2. a kind of method for testing performance of pulse valve is proposed
Adopt the pulse valve device for detecting performance of above-mentioned foundation, the pulse valve performance test methods of proposition is as follows:
1. pulse valve top hole pressure peak value P
Max, can measure by the pressure transducer that is installed on the winding-up pipe, computing machine is handled the data-signal of being gathered, and provides pulse valve top hole pressure crest figure.
2. pulse valve top hole pressure climbing speed
Can measure different pressure constantly and change and obtain by being installed in the pressure transducer of winding-up on the pipe, computing machine be handled the data-signal of being gathered, and provides the time dependent oscillogram of pressure.
3. pulse valve blowing gas flow Δ Q can be by to being installed in the tensimeter on the voltage stabilizing gas bag and the original pressure P of pressure transducer
0With termination pressure P
1Measurement obtain.According to the fluid mechanics principle gas flow
Q is a voltage stabilizing gas bag volume (definite value) in the formula, P
AmbBe normal atmospheric pressure (definite value), K is adiabatic exponent (definite value), is not difficult to find out, as long as measure P
0And P
1, just can calculate the size of gas flow Δ Q.
4. blowing gas momentum R can measure by the acceleration magnitude that target produced, and the acceleration that target produces is measured by acceleration transducer.According to Hydrodynamics Theory, be reflected in the stressed size of target in the unit interval from the gas momentum size of pulse jet pipe ejection, i.e. the acceleration magnitude (the target quality is certain) of target generation.As seen, can measure the blowing gas momentum by measurement to the target acceleration.
5. pulse valve opening and closing time t
g(gas pulse time), can be by being installed in the pressure transducer of winding-up on the pipe, measure from the time interval that begins to experience till pressure to pressure disappears.Computing machine is handled the data-signal of being gathered, and provides the time dependent oscillogram of measured pulse valve outlet port pressure, and on horizontal ordinate, the beginning and ending time gap size of waveform is exactly t
gValue.
6. pulse valve resistance Δ P can be by measuring the original pressure P of voltage stabilizing gas bag
0Pulse peak value P with winding-up tube wall upward pressure sensor measurement
MaxDifference calculate i.e. Δ P=P
0-P
Max
According to the pulse valve device for detecting performance and the method for testing of above-mentioned proposition, the implementation step of pulse valve Performance Detection is as follows:
1. examined the preceding preparation of pulse valve performance test: voltage stabilizing gas bag pressure is suppressed and regulated to compressed air system; Computing machine carries out self check in the system, data initialization; The automatically controlled time that pulse valve opens, delays time, cuts out is examined in setting.
2. pulse valve opens and closes: solenoid valve on the pulse valve sends energising and power-off signal instructs to being examined by computing machine, finishes the pulsatile once process of jetting.
3. data acquisition: start sampling routine when being examined the pulse valve unlatching, computing machine is gathered and imported to data-signals such as the variation of voltage stabilizing gas bag pressure, the pressure variation of being examined pulse valve delivery outlet winding-up pipe and acceleration change by data acquisition system (DAS).
4. data processing: computing machine carries out Treatment Analysis to the data-signal of being gathered, and provides voltage stabilizing gas bag internal pressure and changes oscillogram, examined pulse valve delivery outlet winding-up pipe upward pressure and change oscillogram and target acceleration waveform figure in time.
5. test result is obtained: gone up the pressure waveform figure that measures by examining pulse valve delivery outlet winding-up pipe, draw pulse valve top hole pressure peak value P
Max, the pressure climbing speed
With pulse valve opening and closing time (gas pulse time) t
gOscillogram by the acceleration of measuring the target generation can draw maximum acceleration value a
MaxSize is to characterize and tolerance pulse jet gas momentum R; Pressure variation oscillogram by the voltage stabilizing gas bag can draw original pressure P
0With termination pressure P
1, the pulse valve resistance is by formula Δ P=P
0-P
MaxDraw; The blowing gas flow passes through formula
Calculate.
The invention has the beneficial effects as follows:
1, technical scheme of the present invention provides ways and means for realizing pulse valve Performance Detection and evaluation, and the detection content is comprehensive, complete, versatility is good; Test result is accurate, and is stable, reliable, easy to operate; Performance test, the result that can satisfy different types, different structure, different size pulse valve compare and evaluation.
2, pulse valve device for detecting performance provided by the present invention and method, except that various pulse valves being carried out Performance Detection and estimating, also can obtain the best-of-breed technology performance parameter and the applicable situation of tested pulse valve, for designing and selecting for use pulse valve that scientific basis is provided, avoid because of selecting the improper economic loss that causes for use, also help pulse bag type dust collector and reach best ash-removal effect.
Four, description of drawings
The device for detecting performance structural drawing of Fig. 1 pulse valve
Fig. 2 " power is waved " valve delivery outlet winding-up pipe pressure oscillogram
Voltage stabilizing gas bag pressure changes oscillogram during the winding-up of Fig. 3 " power is waved " valve
Target acceleration wave shape figure during the winding-up of Fig. 4 " power is waved " valve
1. air compressor machines among the figure, 2. gas-holder, 3. oil-water separator, 4. reduction valve, 5. the voltage stabilizing gas bag is 6. examined pulse valve, 7. winding-up pipe, 8. pressure transducer, 9. target, 10. acceleration transducer 11. data collecting cards, 12. computing machines.
Five, embodiment
As Fig. 1, the pulse valve device for detecting performance by air compressor machine 1, gas-holder 2, oil-water separator 3, reduction valve 4, voltage stabilizing gas bag 5, examined pulse valve 6, winding-up pipe 7, pressure transducer 8, target 9, acceleration transducer 10, data collecting card 11, computing machine 12 and formed.
Examined pulse valve 6 under winding-up pipe 7 and target 9 are set, winding-up pipe 7 and target 9 centerings have aperture on the tube wall of winding-up pipe 7;
Tapping with winding-up pipe 7 on voltage stabilizing gas bag 5 is provided with pressure transducer 8 respectively, acceleration transducer 10 is set on target 9, pressure transducer 8 is connected with the electrical control signal wire with the input end of data collecting card 11 with acceleration transducer 10, the output terminal of data collecting card 11 is connected with computing machine 12, computing machine 12 also with examined pulse valve 6 on solenoid valve be connected with control signal wire.
Setting up the pulse valve device for detecting performance according to the present invention, is example with " power is waved " pulse valve, adopts method provided by the invention that it is carried out jetting performance and detects.
Test condition is:
1, examined pulse valve 6 among Fig. 1 and be Taiwan " power is waved " board pulse valve, bore is 76mm;
2, set " power is waved " valve electrical pulse time t
eBe 50ms;
3, set the pulse jet pressure P
0Be 0.2MPa.
Concrete implementation step is as follows:
1, " power is waved " pulse valve 6 is installed on the auxilliary body of voltage stabilizing gas bag 5;
2, air compressor machine 1 provides pressurized air for voltage stabilizing gas bag 5, regulates voltage stabilizing gas bag 5 pressure to 0.2MPa by reduction valve 4;
3, the solenoid valve of computing machine 12 on " power is waved " valve sends electrical instruction, and pulse jet begins, and cuts off the power supply behind the time-delay 50ms, and pulse jet stops;
4, start sampling routine at computing machine 12 when " power is waved " valve sends open command, collection voltage stabilizing gas bag 5 pressure, power are waved the pressure of valve 6 delivery outlets winding-up pipe 7, the acceleration signal of target 9; And deposit sampled data in computing machine 12;
5,12 pairs of sampled datas of computing machine are carried out Treatment Analysis, print the pressure waveform figure of winding-up pipe 7 on " power is waved " valve 6 delivery outlets, as shown in Figure 2; The pressure that prints voltage stabilizing gas bag 5 changes oscillogram, as shown in Figure 3; Print target 9 acceleration waveform figure, as shown in Figure 4;
6, by analysis chart 2, Fig. 3, Fig. 4, it is as follows to obtain and calculate " power is waved " valve pulse jet performance index respectively:
Top hole pressure peak value P
Max: 0.117MPa
The pressure climbing speed
3.90KPa/ms
Target peak acceleration a
Max: 5.72g (characterizing the size of momentum R)
Gas pulse time t
g: 110ms
Winding-up tolerance Δ Q:0.111m
3
" power is waved " valve resistance Δ P:0.083MPa
This shows, can realize the jetting performance of being examined pulse valve is detected and estimates by above embodiment.
Claims (4)
1, a kind of pulse valve device for detecting performance is used for the pick-up unit of the pulse valve jetting performance of environmental protection sack-duster pulse deashing, and this device comprises pressurized air air feed, pulse jet, the collection of winding-up airstream data and four parts of data processing;
The pressurized air air feed is made up of air compressor machine (1), gas-holder (2), oil-water separator (3), reduction valve (4);
Pulse jet by voltage stabilizing gas bag (5), examined pulse valve (6) and winding-up pipe (7) is formed;
The collection of winding-up airstream data is made up of pressure transducer (8), target (9), acceleration transducer (10), data collecting card (11);
Data processing is made up of computing machine (12);
Air compressor machine (1), gas-holder (2), oil-water separator (3) and voltage stabilizing gas bag (5) are connected with the pipeline of calming the anger, and on the pipeline between oil-water separator (3) and the voltage stabilizing gas bag (5) reduction valve (4) are set;
Examined pulse valve (6) under winding-up pipe (7) and target (9) are set, winding-up pipe (7) and target (9) centering, winding-up is managed on the tube wall of (7) and is had aperture;
Tapping last at voltage stabilizing gas bag (5) and winding-up pipe (7) is provided with pressure transducer (8) respectively, acceleration transducer (10) is set on target (9), pressure transducer (8) is connected with the electrical control signal wire with the input end of acceleration transducer (10) with data collecting card (11), the output terminal of data collecting card (11) is connected with computing machine (12), computing machine (12) also with examined pulse valve (6) on solenoid valve be connected with control signal wire.
2, pulse valve device for detecting performance according to claim 1 is characterized in that voltage stabilizing gas bag (5) is a combined type, is divided into main part and auxilliary body portion, connects by flange, is examined pulse valve (6) and is installed on the auxilliary body.
3, pulse valve device for detecting performance according to claim 1 is characterized in that at computing machine (12) and is examined between the solenoid valve of pulse valve (6) Programmable Logic Controller is set.
4, a kind of pulse valve method for testing performance comprises the following steps:
1. pulse valve top hole pressure peak value P
Max, can measure by the pressure transducer (8) that is installed on the winding-up pipe (7), computing machine (12) is handled the data-signal of being gathered, and provides pulse valve top hole pressure crest figure;
2. pulse valve top hole pressure climbing speed
Can measure different pressure constantly and change and obtain by being installed in pressure transducer (8) on the winding-up pipe (7), computing machine (12) be handled the data-signal of being gathered, and provides the time dependent oscillogram of pressure;
3. pulse valve blowing gas flow Δ Q can be by to being installed in the tensimeter on the voltage stabilizing gas bag (5) and the original pressure P of pressure transducer (8)
0With termination pressure P
1Measurement obtain, according to formula
Calculate the size of gas flow Δ Q, Q is a voltage stabilizing gas bag volume in the formula, P
AmbBe normal atmospheric pressure, K is an adiabatic exponent;
4. blowing gas momentum R can measure by the acceleration magnitude that target (9) are produced, and the acceleration that target (9) produces is measured by acceleration transducer (10);
5. pulse valve opening and closing time t
gCan be by being installed in the pressure transducer (8) on the winding-up pipe (7), measure from the time interval that begins to experience till pressure to pressure disappears, computing machine (12) is handled the data-signal of being gathered, and provide the time dependent oscillogram of measured pulse valve outlet port pressure, on horizontal ordinate, the beginning and ending time gap size of waveform is exactly t
gValue.
6. pulse valve resistance Δ P can be by measuring the original pressure P of voltage stabilizing gas bag (5)
0Pulse peak value P with winding-up pipe (7) tube wall upward pressure sensor (8) measurement
MaxDifference calculate i.e. Δ P=P
0-P
Max
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060737 CN1291223C (en) | 2004-08-18 | 2004-08-18 | Pulse valve performance detecting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410060737 CN1291223C (en) | 2004-08-18 | 2004-08-18 | Pulse valve performance detecting device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587951A CN1587951A (en) | 2005-03-02 |
| CN1291223C true CN1291223C (en) | 2006-12-20 |
Family
ID=34603557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410060737 Expired - Fee Related CN1291223C (en) | 2004-08-18 | 2004-08-18 | Pulse valve performance detecting device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1291223C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876594B (en) * | 2009-04-28 | 2012-05-30 | 上海袋式除尘配件有限公司 | Method for detecting performance of pulse valve |
| CN102230845A (en) * | 2011-03-30 | 2011-11-02 | 青岛理工大学 | Device for testing performance of pressure protection valve of high speed train |
| CN102607826B (en) * | 2011-12-31 | 2014-01-29 | 杭州哲达科技股份有限公司 | Anti-surging valve performance testing table based on PLC (Programmable Logic Controller) and testing method |
| CN103018026A (en) * | 2012-12-05 | 2013-04-03 | 上海尚泰环保配件有限公司 | Electromagnetic pulse valve injection performance comprehensive test device |
| CN103743559A (en) * | 2014-01-13 | 2014-04-23 | 广西科穗环境科技有限公司 | Quality inspection device for pulse valves |
| CN106029185B (en) | 2014-05-06 | 2018-05-18 | 深圳市大疆创新科技有限公司 | The equipment, system and method that missile on detection surface is hit |
| CN104122084B (en) * | 2014-08-07 | 2016-12-21 | 珠海格力电器股份有限公司 | Detection apparatus and method for electric expansion valve |
| CN108786300A (en) * | 2018-05-02 | 2018-11-13 | 太仓北新建材有限公司 | A kind of fault detection method and device of bag-type dust collecting equipment |
| WO2019230029A1 (en) * | 2018-05-28 | 2019-12-05 | 株式会社島津製作所 | Pulsed gas valve inspection device |
| CN109374290A (en) * | 2018-12-28 | 2019-02-22 | 合肥美亚光电技术股份有限公司 | Spray the detection device of valve |
| CN109827768A (en) * | 2019-02-28 | 2019-05-31 | 合肥中亚环保科技有限公司 | A kind of pulse valve fault detection method and system |
| CN111811728A (en) * | 2020-06-29 | 2020-10-23 | 江苏理工学院 | Monitoring system |
| CN115591325A (en) * | 2022-10-26 | 2023-01-13 | 浙江嘉鑫机械部件有限公司（Cn） | Device and method for testing and evaluating bag type dust removal pulse blowing performance |
-
2004
- 2004-08-18 CN CN 200410060737 patent/CN1291223C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1587951A (en) | 2005-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1291223C (en) | Pulse valve performance detecting device and method | |
| CN103743562B (en) | A kind of electromagnetic valve test platform | |
| CN108317032A (en) | A kind of experimental rig and method measuring natural gas engine gas emitted dose | |
| CN201765113U (en) | Device for testing performance comparison of electromagnetic pulse valves | |
| CN110793781A (en) | Measuring device and measuring method for particulate matters contained in DPF engine exhaust | |
| CN203116953U (en) | On-line safety valve detector | |
| CN2781346Y (en) | Device for testing performance of pulse valve | |
| CN110320332A (en) | A kind of balanced type exhaust gas on-line detecting system | |
| CN101424657A (en) | Ph automatic continuous detection device | |
| CN201137543Y (en) | Oil jetting pump oil spout rule test stand | |
| CN109186981A (en) | A kind of high-power nozzle group valve discharge characteristic is test bed | |
| CN115931682A (en) | Filter material dynamic performance tester and testing method thereof | |
| CN101055217A (en) | Automatic detection device for air-tightness of bubble-blowing raft | |
| CN105464871B (en) | PT pump fuel injector fuel metering systems and its metering method | |
| CN102364310B (en) | Automatic measuring system of water discharge of high-pressure turbine work blades and measuring method thereof | |
| CN202140149U (en) | Measuring device for regeneration point of tail gas filter of diesel engine | |
| CN109268344A (en) | A kind of governor valve Instantaneous Flow test device and its test method | |
| CN210863055U (en) | Special tool for detecting air tightness of cooler | |
| CN112267998B (en) | Method for testing highest temperature in cylinder and nonuniformity of cylinders of multi-cylinder diesel engine | |
| CN217931045U (en) | Device suitable for gas analysis appearance sample dewatering | |
| CN203396583U (en) | Apparatus for detecting performance of pneumatic brake pressure regulator | |
| CN208787876U (en) | Inlet manifold inserts automatic charging press-loading device | |
| CN201569574U (en) | Flow pressure test board of pressure regulating valve | |
| CN202065066U (en) | Disassembly-free automatic cleaning device for fuel spray nozzle | |
| CN221055970U (en) | Fuel filter vibration test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: TIANCHENG ENVIRONMENT PROTECTION TECH. CO., LTD., Free format text: FORMER NAME: TIANCHENG ENVIRONMENTAL PROTECTION SCIENE AND TECHNOLOGY CO., LTD., WUHAN |
|
| CP03 | Change of name, title or address |
Address after: 430205 East Lake New Technology Development Zone, Hubei, Optics Valley, No. 1, Wuhan Road, No. 225 Patentee after: Tiancheng Environment Protection Tech. Co., Ltd., Zhonggang Group Address before: 430081 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 399 Patentee before: Tiancheng Environmental Protection Sciene and Technology Co., Ltd., Wuhan |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061220 Termination date: 20200818 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |