CN211013484U - Pneumatic regulating valve testing device - Google Patents
Pneumatic regulating valve testing device Download PDFInfo
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- CN211013484U CN211013484U CN201922245407.1U CN201922245407U CN211013484U CN 211013484 U CN211013484 U CN 211013484U CN 201922245407 U CN201922245407 U CN 201922245407U CN 211013484 U CN211013484 U CN 211013484U
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Abstract
A pneumatic control valve testing device is characterized in that a control unit comprises a controller and a touch screen; a hydraulic pipeline of the execution unit is sequentially provided with a pneumatic booster pump, a pressure retaining valve, a detection container and a hydraulic output interface; the hydraulic pipeline is also provided with a pressure relief valve, the detection container is also connected with a water pressure detection module, the air pressure pipeline is connected with an air pressure transmitter, the air pressure pipeline is divided into a plurality of branches, the branches are respectively connected with the air input end of the pneumatic booster pump through an electric proportional valve, the control end of the pressure relief valve and the air pressure output port, and the hydraulic output interface and the air pressure output port are respectively connected with the liquid input end and the air input end of the measured pneumatic regulating valve; the pressure retaining valve, the pressure release valve, the electric proportional valve, the measured pneumatic regulating valve, the wind pressure transmitter and the water pressure detection module are all connected with the controller. The testing device can meet the requirement of comprehensive and automatic field testing of the pneumatic regulating valve, can set parameters and display testing results through the touch screen, and is high in visualization.
Description
Technical Field
The utility model relates to a test field, in particular to pneumatic control valve testing arrangement.
Background
The valve test bed is a necessary tool for testing before the on-line installation of the regulating valve, the existing test beds of the valves at home and abroad have mature products and can realize the tests of the strength, the leakage and the like of the valves, but the test beds of the valves have large volume and incomplete functions and are all fixed and can not cover the standards of the maintenance and repair test items of the regulating valve.
In the automation control industries such as petrochemical industry, the regulating valve is an important link for ensuring high precision and stable operation of automation control, the daily fault maintenance rate accounts for about 50% of the instrument, a user expects to shorten the maintenance and avoid the repair as much as possible, the production requirement is met to the maximum extent, and therefore a plurality of testing devices of the regulating valve are provided.
Chinese utility model discloses a governing valve testing arrangement and have as patent number CN201620859095.7 (No. CN205981644U) testing arrangement's governing valve test system, include booster pump, precision pressure gauge, the solenoid valve of intaking, drainage solenoid valve and the flowmeter that connects gradually through the pipeline, wherein, set up between solenoid valve of intaking and the drainage solenoid valve with the water inlet of governing valve, first fast interface of delivery port assorted and the fast interface of second. The utility model discloses a testing arrangement and system simple structure, convenient to use can carry out the test and the school of one or more governing valve simultaneously and decide, facilitate for product test, can effectively improve efficiency of software testing, reduce intensity of labour, practice thrift personnel's cost. However, in a closed-loop control system, the fault of an actuating mechanism such as a regulating valve is often covered by a feedback control action, and the fault often has serious nonlinear characteristics, so that the fault is not obvious in expression, namely, the fault detection cannot be realized by a testing device, and the detection with higher requirements cannot be met. Further improvements are therefore desirable.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem to prior art's current situation, provide one kind and can realize manual and automatic switching, and can detect the pneumatic control valve testing arrangement of trouble.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a pneumatic control valve testing device comprises a control unit and an execution unit, wherein the execution unit comprises a hydraulic pipeline and a pneumatic pipeline, and is characterized in that: the control unit comprises a controller and a touch screen connected with the controller;
the hydraulic pipeline is sequentially provided with a pneumatic booster pump, a pressure retaining valve, a detection container and a hydraulic output interface; the liquid input end of the pneumatic booster pump of the detection container is connected with an external water inlet pipe and is used for boosting the medium in the external water inlet pipe; the hydraulic pipeline is also provided with a pressure release valve, wherein the input end of the pressure release valve is connected with the detection container, the output end of the pressure release valve is connected with the pipeline between the water inlet pipe and the pneumatic booster pump, the hydraulic output interface is connected with the liquid input end of the measured pneumatic regulating valve, and the detection container is also connected with a water pressure detection module;
the bus of the pneumatic pipeline is connected with a wind pressure transmitter for detecting the pressure in the pneumatic pipeline, the bus of the pneumatic pipeline is divided into a plurality of branches, wherein the first branch is connected with the gas input end of the pneumatic booster pump through an electric proportional valve, the second branch is connected with the control end of the pressure relief valve, the third branch is connected with the control end of the pressure maintaining valve, the fourth branch is connected with a pneumatic output port, and the pneumatic output port is connected with the gas input end of the pneumatic regulating valve to be detected;
the control end of pressure retaining valve, relief valve, electric proportional valve and the pneumatic control valve under test and wind pressure changer and water pressure detection module all are connected with the controller, the controller is used for automatic control pressure retaining valve, relief valve, electric proportional valve and the pneumatic control valve under test work and obtains the pressure that wind pressure changer and water pressure detection module detected.
As an improvement, a first manual pressure regulating valve is further arranged on the air pressure pipeline between the first branch and the electric proportional valve, a second manual pressure regulating valve is further arranged on the air pressure pipeline between the second branch and the pressure release valve, a third manual pressure regulating valve is further arranged on the air pressure pipeline between the third branch and the pressure retaining valve, and a fourth manual pressure regulating valve is further arranged on the air pressure pipeline between the third branch and the air pressure output port. The independent operation of the execution unit in the non-automatic mode is realized by arranging a manual pressure regulating valve on each branch.
And a wind pressure adjusting main valve is connected on the air pressure pipeline between the air inlet of the air pressure pipeline and the wind pressure transmitter. The main valve for wind pressure regulation is a main switch and is used for initially regulating a pneumatic pipeline.
In order to prevent inflammable gas possibly existing in the field from entering a control unit, the control unit is internally provided with a wind pressure pipeline and a silencer arranged at the output end of the wind pressure pipeline, the input end of the wind pressure pipeline is connected with a fifth manual pressure regulating valve through a pneumatic pipeline, and the other end of the fifth manual pressure regulating valve is connected to the pneumatic pipeline between the wind pressure regulating main valve and the wind pressure transmitter.
Similarly, in order to control the water inflow, a water inlet main valve connected between an external water inlet pipe and the liquid input end of the pneumatic booster pump is further arranged on the hydraulic pipeline.
In this scheme, it still is connected with temperature detection module to detect the container, temperature detection module is connected with the controller.
In addition, in order to prevent the pressure in the detection container from being too high when the automatic control fails, the detection container is also connected with a safety valve for overpressure protection. When the pressure in the detection container is too high, the mechanical part can release the pressure of the detection container through the pressure release port of the safety valve.
Furthermore, the pneumatic booster pump further comprises a sixth manual regulating valve arranged between the output end of the pneumatic booster pump and the pressure retaining valve.
The control unit also comprises a power module connected with the controller.
The control unit is also internally provided with an acquisition module for acquiring a stroke feedback signal of the tested pneumatic regulating valve, and the acquisition module is connected with the input end of the controller.
Compared with the prior art, the utility model has the advantages of: this testing arrangement passes through controller automatic control relief valve, the pressure retaining valve, electric proportional valve and the work of being surveyed pneumatic control valve to can issue the instruction through the touch-sensitive screen and accomplish pneumatic control valve's functional test for controller control, and look over the test response curve trend of being surveyed pneumatic control valve through the touch-sensitive screen, consequently this testing arrangement simple structure, automated operation, can satisfy the on-the-spot comprehensive test to pneumatic control valve, and can set for the parameter and show the test result through the touch-sensitive screen, data are filed, it is visual strong.
Drawings
Fig. 1 is a schematic block diagram of a pneumatic control valve testing device in an embodiment of the present invention;
fig. 2 is a control block diagram of the pneumatic control valve testing device in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in FIGS. 1-2, a pneumatic control valve testing device comprises a control unit and an execution unit, wherein
The control unit comprises a controller and a touch screen connected with the controller, wherein in the embodiment, the controller adopts a P L C controller;
the execution unit comprises a hydraulic pipeline 1 and a pneumatic pipeline 2;
the hydraulic pipeline 1 is sequentially provided with a pneumatic booster pump 3, a pressure retaining valve 4, a detection container 5 and a hydraulic output interface 6; the liquid input end of the pneumatic booster pump 3 is connected with the external water inlet pipe 7 and is used for boosting the medium in the external water inlet pipe 7; the hydraulic pipeline 1 is also provided with a pressure release valve 8, wherein the input end of the pressure release valve 8 is connected with the detection container 5, the output end of the pressure release valve 8 is connected with the pipeline between the water inlet pipe 7 and the pneumatic booster pump 3, the hydraulic output interface 6 is connected with the liquid input end of the tested pneumatic regulating valve, and the detection container 5 is also connected with a water pressure detection module 52 for detecting water pressure;
the bus of the air pressure pipeline 2 is connected with an air pressure transmitter 9 for detecting the pressure in the air pressure pipeline 2, and the bus of the air pressure pipeline 2 is divided into a plurality of branches, wherein a first branch 21 is connected with the air input end of the pneumatic booster pump 3 through an electric proportional valve 10, a second branch 22 is connected with the control end of the pressure relief valve 8, a third branch 23 is connected with the control end of the pressure retaining valve 4, a fourth branch 24 is connected with an air pressure output port 11, and the air pressure output port 11 is connected with the air input end of the measured regulating valve; the output air pressure is set through the electric proportional valve 10, so that the pneumatic booster pump 3 is controlled to work by taking compressed air as a power source, and the pneumatic booster pump 3 is used for boosting the medium in the water inlet pipe 7;
the pressure retaining valve 4, the pressure release valve 8, the electric proportional valve 10, the control end of the measured pneumatic regulating valve, the wind pressure transmitter 9 and the water pressure detection module 52 are all connected with the controller, and are used for automatically controlling the pressure retaining valve 4, the pressure release valve 8, the electric proportional valve 10 and the measured pneumatic regulating valve to work and acquiring the pressure detected by the wind pressure transmitter 9 and the pneumatic booster pump 3.
In the embodiment, the pressure retaining valve 4 and the pressure release valve 8 both adopt high-pressure needle type pneumatic valves and are provided with split type two-position five-way electromagnetic valves; the hydraulic output interface 6 is a high-pressure quick connector, and the air pressure output port 11 is a quick connector.
During production, the control unit and the execution unit are respectively arranged in different boxes, the hydraulic output interface 6 and the air pressure output port 11 are exposed out of a box shell for installing the execution unit, and during actual test, only the tested pneumatic regulating valve is connected with the exposed hydraulic output interface 6 and the exposed air pressure output port 11, so that the volume and the weight of the box body of the control unit and the execution unit which are arranged in the test device are controlled within a single-person carrying range, and the test device is convenient to transport.
In order to realize manual control of each branch, a first manual pressure regulating valve 12 is further arranged on an air pressure pipeline between the first branch 21 and the electric proportional valve 10, a second manual pressure regulating valve 13 is further arranged on an air pressure pipeline between the second branch 22 and the pressure relief valve 8, a third manual pressure regulating valve 14 is further arranged on an air pressure pipeline between the third branch 23 and the pressure retaining valve 4, and a fourth manual pressure regulating valve 15 is further arranged on an air pressure pipeline between the third branch 24 and the air pressure output port 11.
In addition, in order to control the air inflow and the water inflow, a wind pressure adjusting main valve 16 is connected to the air pressure pipeline between the air inlet 18 of the air pressure pipeline 2 and the wind pressure transmitter 9, and a water inlet main valve 17 connected between the external water inlet pipe 7 and the liquid input end of the pneumatic booster pump 3 is also arranged on the hydraulic pipeline 1.
The control unit is also internally provided with a wind pressure pipeline 19 for realizing positive pressure ventilation in the control unit and a silencer arranged at the output end of the wind pressure pipeline, the input end of the wind pressure pipeline 19 is connected with a fifth manual pressure regulating valve 20 through a pneumatic pipeline, and the other end of the fifth manual pressure regulating valve 20 is connected on the pneumatic pipeline between the wind pressure regulating main valve 16 and the wind pressure transmitter 9. In addition, the control unit also comprises a power module connected with the controller and an acquisition module connected with the controller and used for acquiring a stroke feedback signal of the measured pneumatic regulating valve. In this embodiment, the power module is a storage battery.
And the pneumatic booster pump further comprises a sixth manual regulating valve 25 arranged between the pneumatic booster pump 3 and the pressure retaining valve 4. The sixth manual regulating valve 25 is manually regulated to perform manual pressure relief when the equipment needs to be repaired or an emergency occurs.
The detection container 5 is also connected with a safety valve 51 for overpressure protection and a water temperature detection module 53, and the water temperature detection module 53 is connected with the controller. The water pressure detection module 52 is used for detecting real-time pressure in the detection container 5, the water temperature detection module 53 is used for detecting real-time water temperature in the detection container 5, the real-time pressure and water temperature data in the detection container 5 are collected through the controller, and the controller timely controls the electric proportional valve 10, the pressure release valve 8 and the pressure retaining valve 4 to work according to the collected data result; when using, when the water pressure that water pressure detection module 52 in the detection container 5 gathered surpassed the high pressure setting value of detection container 5, then controller control electric proportional valve 10 stops angry, pressure retaining valve 4 and relief valve 8 open, relief valve 8 carries out timely pressure release in to detection container 5 and atmospheric pressure pipeline 2, thereby it is unexpected to prevent to detect the too high emergence of pressure in the container 5, and cause when the too high pressure in the detection container 5 when relief valve 8 became invalid and can not realize automatic pressure release, then relief valve 51 works, carry out the pressure release through the pressure release mouth of relief valve 51 self.
When the testing device is used for testing the pneumatic regulating valve, firstly, a testing program is stored in the controller, and an instruction is issued through the touch screen to control the testing; the touch screen can display the water pressure at the detection container, the water temperature at the detection container and the pressure detected by the wind pressure transmitter in real time and control the execution conditions of equipment such as a pressure retaining valve, a pressure release valve and the like; in this embodiment, according to the detection and maintenance strategy for studying the daily pneumatic control valve, the technical index, the control scheme, and the process flow of the testing apparatus are determined, and the method specifically includes the following tests:
1. valve stroke time and position deviation tests, including tests of deviation of an actual valve position and an input valve position, full-stroke basic characteristic tests, switching time and the like;
2. valve position conventional pressure tests comprise tests of shell strength, compressive strength, leakage, membrane head air tightness, packing sealing performance and the like;
3. pressure resistance or leakage test of instrument pipelines such as pressure guide and the like, or application of the pressure guide and the like as an external pressure source and the like.
In the embodiment, the test program comprises a program-controlled valve switch test, a valve leakage test, a packing leakage test, a valve stroke test and a pipeline pressure test, the tests are all conventional tests of a pneumatic regulating valve, when the test device is used for testing, firstly, the test device is electrified, then, hardware self-check is carried out, a self-check result can be displayed on a touch screen, parameter setting is carried out on the touch screen after the self-check is finished, then, an operation module is selected, and when a manual module is selected, the start and stop of the pneumatic booster pump and the opening and closing of a pressure maintaining valve, a pressure relief valve and the tested pneumatic regulating valve can be manually controlled on the touch screen; when the automatic mode is selected, a program control valve switch test, a valve leakage test, a packing leakage test, a valve stroke test or a pipeline pressure test can be selected, the controller can automatically control the work of the pressure retaining valve, the pressure release valve, the electric proportional valve and the tested pneumatic regulating valve according to each test program, and display a detection result according to the touch screen, so that the pneumatic regulating valve to be tested is automatically tested; the pressure unit may also be applied independently of the operation when acting as an external pressure source only. Therefore, the testing device can realize the automatic test of the pneumatic regulating valve, is suitable for the comprehensive and visual test of the pneumatic regulating valve, visually monitors the detection process through the whole process of the human-computer interface of the touch screen, extracts and generates an analysis report by using filed data, reduces the interference of human factors, and improves the efficiency and the reliability.
The testing device starts from a measurable signal provided by the valve actuating mechanism, and does not need to model a controlled process, so that the testing device is simpler and more practical in engineering realization. Secondly, the testing device can also be used for factory and field maintenance tests of the pneumatic regulating valve, and solves the problems that the existing valve testing platform in the market is not a special testing platform for the regulating valve, can not independently complete multi-function comprehensive tests, and has poor field adaptability and the like.
Claims (10)
1. A pneumatic control valve testing device comprises a control unit and an execution unit, wherein the execution unit comprises a hydraulic pipeline and a pneumatic pipeline, and is characterized in that: the control unit comprises a controller and a touch screen connected with the controller;
the hydraulic pipeline is sequentially provided with a pneumatic booster pump, a pressure retaining valve, a detection container and a hydraulic output interface; the liquid input end of the pneumatic booster pump is connected with the external water inlet pipe and is used for boosting the medium in the external water inlet pipe; the hydraulic pipeline is also provided with a pressure release valve, wherein the input end of the pressure release valve is connected with the detection container, the output end of the pressure release valve is connected with the pipeline between the water inlet pipe and the pneumatic booster pump, the hydraulic output interface is connected with the liquid input end of the measured pneumatic regulating valve, and the detection container is also connected with a water pressure detection module;
the bus of the pneumatic pipeline is connected with a wind pressure transmitter for detecting the pressure in the pneumatic pipeline, the bus of the pneumatic pipeline is divided into a plurality of branches, wherein the first branch is connected with the gas input end of the pneumatic booster pump through an electric proportional valve, the second branch is connected with the control end of the pressure relief valve, the third branch is connected with the control end of the pressure maintaining valve, the fourth branch is connected with a pneumatic output port, and the pneumatic output port is connected with the gas input end of the pneumatic regulating valve to be detected;
the control end of the pressure retaining valve, the pressure release valve, the electric proportional valve, the measured pneumatic regulating valve, the wind pressure transmitter and the water pressure detection module are all connected with the controller, and the controller is used for automatically controlling the pressure retaining valve, the pressure release valve, the electric proportional valve and the measured pneumatic regulating valve to work and acquiring the pressure detected by the wind pressure transmitter and the water pressure detection module.
2. The pneumatic regulator valve testing apparatus of claim 1, wherein: the pneumatic pipeline between the first branch and the electric proportional valve is further provided with a first manual pressure regulating valve, the pneumatic pipeline between the second branch and the pressure release valve is further provided with a second manual pressure regulating valve, the pneumatic pipeline between the third branch and the pressure retaining valve is further provided with a third manual pressure regulating valve, and the pneumatic pipeline between the third branch and the pneumatic output port is further provided with a fourth manual pressure regulating valve.
3. The pneumatic regulator valve testing apparatus of claim 1, wherein: and a wind pressure adjusting main valve is connected on the air pressure pipeline between the air inlet of the air pressure pipeline and the wind pressure transmitter.
4. The pneumatic regulator valve testing apparatus of claim 3, wherein: still include the wind pressure pipeline in the control unit and locate the muffler of wind pressure pipeline output, the input of wind pressure pipeline has the fifth manual air-vent valve through an air pressure pipe connection, and the other end of fifth manual air-vent valve is connected on the air pressure pipeline between wind pressure adjusting main valve and the wind pressure transmitter.
5. The pneumatic regulator valve testing apparatus of claim 1, wherein: and the hydraulic pipeline is also provided with a water inlet main valve connected between an external water inlet pipe and the liquid input end of the pneumatic booster pump.
6. The pneumatic regulator valve testing apparatus of claim 1, wherein: the detection container is further connected with a water temperature detection module, and the water temperature detection module is connected with the controller.
7. The pneumatic regulator valve testing apparatus of claim 6, wherein: the detection container is also connected with a safety valve for overpressure protection.
8. The pneumatic regulator valve testing device of any one of claims 1 to 7, wherein: still including locating the sixth manual control valve between pneumatic booster pump's the output and the pressure retaining valve.
9. The pneumatic regulator valve testing apparatus of claim 1, wherein: the control unit also comprises a power module connected with the controller.
10. A pneumatic regulator valve testing apparatus according to any of claims 1, 4 or 9, wherein: the control unit is also internally provided with an acquisition module for acquiring a stroke feedback signal of the tested pneumatic regulating valve, and the acquisition module is connected with the input end of the controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245407.1U CN211013484U (en) | 2019-12-13 | 2019-12-13 | Pneumatic regulating valve testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922245407.1U CN211013484U (en) | 2019-12-13 | 2019-12-13 | Pneumatic regulating valve testing device |
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| CN211013484U true CN211013484U (en) | 2020-07-14 |
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| CN201922245407.1U Active CN211013484U (en) | 2019-12-13 | 2019-12-13 | Pneumatic regulating valve testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359887A (en) * | 2021-06-11 | 2021-09-07 | 华能澜沧江水电股份有限公司 | Ultrahigh-pressure grouting pressure control device and control method |
| CN114018309A (en) * | 2021-12-14 | 2022-02-08 | 国家石油天然气管网集团有限公司 | Industrial wireless instrument field performance test comparison device and test method |
-
2019
- 2019-12-13 CN CN201922245407.1U patent/CN211013484U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359887A (en) * | 2021-06-11 | 2021-09-07 | 华能澜沧江水电股份有限公司 | Ultrahigh-pressure grouting pressure control device and control method |
| CN114018309A (en) * | 2021-12-14 | 2022-02-08 | 国家石油天然气管网集团有限公司 | Industrial wireless instrument field performance test comparison device and test method |
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Address after: 315207 Jiaochuan Street Refining Road, Zhenhai District, Ningbo City, Zhejiang Province Patentee after: Zhenhai Petrochemical Construction and Installation Engineering Co.,Ltd. Address before: 315207 Jiaochuan Street Refining Road, Zhenhai District, Ningbo City, Zhejiang Province Patentee before: ZHENHAI PETROCHEMICAL JIANAN ENGINEERING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |