CN110671390A - Method and device for detecting action characteristics of reversing valve unit - Google Patents
Method and device for detecting action characteristics of reversing valve unit Download PDFInfo
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- CN110671390A CN110671390A CN201810720133.4A CN201810720133A CN110671390A CN 110671390 A CN110671390 A CN 110671390A CN 201810720133 A CN201810720133 A CN 201810720133A CN 110671390 A CN110671390 A CN 110671390A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a method and a device for detecting the action characteristics of a reversing valve unit, wherein the method for detecting the action characteristics of the reversing valve unit comprises the following steps: (1) sending a driving signal for driving a driving coil of the reversing valve to act, recording the sending time of the driving signal, and measuring the data of the current of the coil changing along with the time; (2) measuring the displacement and the load of the valve core to obtain data of the valve core displacement and the valve core load respectively related to time change; (3) and analyzing the measured data to obtain the action characteristic of the reversing valve. The motion characteristic of the valve core is obtained by detecting the displacement of the valve core, the current change of the coil and the load of the valve core, the fault condition of each part of the reversing valve is obtained by analyzing the detected motion characteristic, and the reversing valve is maintained in a targeted manner, so that the problem of low maintenance efficiency of the reversing valve in the prior art is solved.
Description
Technical Field
The invention relates to a method and a device for detecting the action characteristics of a reversing valve unit.
Background
The hydraulic operating mechanism is an operating mechanism form conventionally adopted by the GCB, and has the advantages of compact appearance, stable energy storage, high action reliability and the like, as shown in fig. 2, the hydraulic mechanism can be totally divided into four parts, namely a reversing valve 16, an oil pump unit 18, an operating cylinder unit 19 and an accumulator unit 23, a control oil path 21 is respectively communicated with a high-pressure oil path 22 and a low-pressure oil path 20 through reversing control of the reversing valve 16, and the function of controlling the main piston 17 of the hydraulic mechanism to perform opening and closing operations is achieved.
As shown in fig. 2, the reversing valve unit includes a valve body, a valve core 1, and a switching coil (hereinafter, referred to as a reversing coil) and a switching coil (hereinafter, referred to as a switching coil) respectively located at both sides of the valve body 4. When the GCB needs to be operated, the corresponding reversing coil 2 is powered on, the moving iron 3 in the reversing coil 2 pushes the valve core 1 of the reversing valve to move, and oil pressure of an oil path in the hydraulic mechanism is converted, so that opening and closing operations of the hydraulic mechanism are realized, wherein the reversing coil 2 and the moving iron 3 form a driving part.
The action of the reversing valve requires that a reversing coil applies certain driving force to the reversing valve core on the basis of overcoming the oil pressure difference of the valve core part of the reversing valve and the movement resistance of the valve core sealing part, so that the valve core of the reversing valve can reliably reach a preset sealing position, and the action oil pressure of an operating mechanism can be smoothly established.
In summary, in the hydraulic mechanism, the action characteristic of the valve core of the reversing valve is a core factor for ensuring normal and stable operation of the mechanism, and in the process of research and development and daily operation and maintenance of the operating mechanism, the action characteristic parameters of the valve core of the reversing valve can be directly and accurately obtained, so that reliable data support can be provided for continuous and serial research and development of the hydraulic mechanism, and the working state and stability of the hydraulic mechanism during operation can be accurately diagnosed. However, most of the prior art only measures the displacement of the valve core, and when the reversing valve fails, the fault position of the reversing valve cannot be accurately judged only by means of the displacement data of the valve core, so that the problem of low maintenance efficiency of the reversing valve is caused.
Disclosure of Invention
The invention aims to provide a method for detecting the action characteristic of a reversing valve unit, which aims to solve the problem of low maintenance efficiency of the reversing valve in the prior art; another object of the present invention is to provide a device for detecting an operating characteristic of a selector valve unit.
In order to achieve the purpose, the technical scheme of the method for detecting the action characteristic of the reversing valve unit is as follows:
the method for detecting the action characteristic of the reversing valve unit comprises the following steps: (1) sending a driving signal for driving a driving coil of the reversing valve to act, recording the sending time of the driving signal, and measuring the data of the current of the coil changing along with the time; (2) measuring the displacement and the load of the valve core to obtain data of the valve core displacement and the valve core load respectively related to time change; (3) and analyzing the measured data to obtain the action characteristic of the reversing valve.
The invention has the beneficial effects that: the motion characteristic of the valve core is obtained by detecting the displacement of the valve core, the current change of the coil and the load of the valve core, the fault condition of each part of the reversing valve is obtained by analyzing the detected motion characteristic, and the reversing valve is maintained in a targeted manner, so that the problem of low maintenance efficiency of the reversing valve in the prior art is solved.
Furthermore, in order to obtain the response condition of the operating mechanism to the valve core action, in step (2), the displacement of the moving end of the operating mechanism needs to be measured to obtain data of the displacement of the moving end with respect to time change, the response condition of the moving end to the valve core action of the reversing valve is judged by detecting the displacement of the moving end of the operating mechanism, and whether the moving end of the operating mechanism or a pipeline between the reversing valve and the moving end has a fault or not is judged.
The technical scheme of the device for detecting the action characteristic of the reversing valve unit is as follows:
the reversing valve unit action characteristic detection device comprises a valve core displacement sensor for measuring valve core displacement, a coil detection unit for detecting current change of a coil, a pressure sensor for measuring valve core load by measuring driving force for driving the valve core and a data acquisition processing module for acquiring and analyzing measurement signals measured by the coil detection unit, the displacement sensor and the pressure sensor, wherein the pressure sensor is arranged between the valve core and a moving iron in the coil.
The invention has the beneficial effects that: the motion characteristic of the valve core is obtained by detecting the displacement of the valve core, the current change of the coil and the load of the valve core, the motion load of the valve core is indirectly obtained by measuring the driving force for driving the valve core, the fault conditions of all parts of the reversing valve are obtained by analyzing the measured motion characteristic, and the problem that the motion characteristic of the valve core cannot be completely obtained in the prior art is solved.
Furthermore, in order to obtain the response condition of the operating mechanism to the action of the valve core, the action characteristic detection device of the reversing valve unit further comprises a moving end displacement sensor for measuring the displacement of the moving end of the operating mechanism, the response condition of the moving end to the action of the valve core of the reversing valve is judged by detecting the displacement of the moving end of the operating mechanism, and whether the moving end or a pipeline between the reversing valve and the moving end breaks down or not is judged.
Further, in order to avoid secondary processing of the valve core, the reversing valve unit action characteristic detection device further comprises a support used for being fixed relative to the valve body, a measuring rod used for being arranged between the valve core and the moving iron of the coil is assembled on the support in a sliding mode, the two ends of the measuring rod are respectively a moving iron matching end and a valve core matching end which are used for being matched with the moving iron and the valve core in an abutting-pressing mode so that the moving iron drives the valve core to move through the measuring rod, the pressure sensor is arranged on the moving iron matching end or the valve core matching end of the measuring rod, and the measuring rod provided with the pressure sensor is arranged between the coil and the valve core so that secondary processing of the valve core is avoided.
Furthermore, in order to reduce the assembly difficulty of the displacement measuring unit, the valve core displacement sensor is a laser displacement sensor which is arranged at one end of the valve core far away from the measuring rod and arranged outside the valve body, the displacement is indirectly measured by changing the distance between the valve core displacement sensor and the valve core, and meanwhile, the valve core displacement sensor is arranged outside the valve body, so that the assembly difficulty of the valve core displacement sensor is simplified.
Further, in order to facilitate the fixing of the support, a support fixing hole is formed in the support, the support penetrates through a connecting screw rod for fixing the valve body and the coil, and the support is fixed between the valve body and the coil through the connecting screw rod originally arranged on the valve body, so that the support is convenient to fix.
Furthermore, in order to facilitate the processing of the support, the support comprises a support body and support supporting structures arranged on the two sides of the support body along the extending direction of the measuring rod, the support supporting structures and the support body are respectively provided with the support fixing holes, the measuring rod is assembled on the support body in a sliding mode, and the processing difficulty of the support is reduced by arranging the support into a split structure.
Furthermore, in order to improve the measurement accuracy, a protective sleeve penetrates through the support, a protective sleeve hole in sliding fit with the measuring rod is formed in the protective sleeve, so that the measuring rod is assembled on the support in a sliding mode, the measuring rod is guided through the protective sleeve, the length of a guide section of the measuring rod is increased, and the measurement accuracy is improved.
Furthermore, in order to improve the measurement accuracy, a wear-resistant lubricating layer is arranged on the inner hole wall of the protective sleeve, so that the influence of the friction force between the inner hole of the protective sleeve and the measuring rod on the measurement accuracy of the valve element load is avoided.
Drawings
FIG. 1 is a schematic diagram of a prior art reversing valve;
FIG. 2 is a schematic view of the operation principle of the operation mechanism in the prior art;
fig. 3 is a detection schematic diagram of an embodiment 1 of the operation characteristic detection apparatus of the direction valve unit of the present invention;
fig. 4 is a graph showing the operational characteristics of the switching valve unit measured in the embodiment 1 of the device for detecting operational characteristics of a switching valve unit according to the present invention.
In the figure: 1. a valve core; 2. a commutation coil; 3. moving iron; 4. a valve body; 5. a measuring rod; 6. a protective sleeve; 7. a support sleeve; 8. a support; 9. a pressure sensor; 10. a laser displacement sensor; 11. a data acquisition processing module; 12. a connecting nut; 13. connecting a screw rod; 14. a main break of the circuit breaker; 15. a grating displacement sensor; 16. a diverter valve; 17. a primary piston; 18. an oil pump unit; 19. an operating cylinder unit 20, a low pressure oil path; 21. controlling an oil path; 22. a high-pressure oil path; 23. an accumulator unit.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 3, in the present embodiment, the reversing valve unit operation characteristic detection device is mainly applied to detecting the operation characteristic of the reversing valve unit in the hydraulic operating mechanism, but the application field of the reversing valve unit operation characteristic detection device of the present invention is not limited thereto, and naturally, in other embodiments, the reversing valve unit operation characteristic detection device may be applied to detecting the operation characteristic of the spool of other spool valves.
The reversing valve unit action characteristic detection device comprises a support 8 arranged between a reversing coil 2 on one side of the reversing valve and a valve body 4 of the reversing valve, a support fixing hole corresponding to a fixing hole in the reversing coil 2 is formed in the support 8, a connecting screw 13 of the valve body 4 and the reversing coil 2 penetrates through the support fixing hole and the fixing hole in the reversing coil 2 and is in threaded connection with a connecting nut 12 arranged on one side, far away from the valve body 4, of the reversing coil 2, and the support 8 is fixed between the reversing coil 2 and the valve body 4. In order to realize the measurement of the movement load of the valve core 1, a measuring rod 5 is arranged between a movable iron 3 of the reversing valve and the valve core 1, a support through hole for the measuring rod 5 to penetrate is arranged on a support 8, the two ends of the measuring rod 5 along the sliding direction are respectively a movable iron matching end which is in abutting fit with the movable iron 3 and a valve core matching end which is in abutting fit with the valve core 1, a pressure sensor 9 is arranged on the movable iron matching end of the measuring rod 5, the movable iron 3 is driven to push the measuring rod 5 to move after a reversing coil 2 of the reversing valve is electrified, the measuring rod 5 then pushes the valve core 1 to move, the reversing valve unit movement characteristic detection device further comprises a data acquisition processing module 11 for acquiring the measured data, the electrified time of the valve core 1 and the change situation of the current along with the time are recorded by the data acquisition processing module 11, and the change situation of the thrust of the movable iron 3 to the measuring rod 5 along with the time is, for subsequent analysis.
In this embodiment, in order to improve the measurement accuracy of case load, guarantee the uniformity of the slip direction of measuring stick 5, still wear to be equipped with the protective sheath 6 that has certain length in the support perforation, be equipped with on protective sheath 6 when measuring stick 5 slides with the protective sheath hole of 5 sliding fit of measuring stick, the spraying has wear-resisting, lubricating coating on the pore wall of protective sheath hole, avoids extra moving resistance to influence the measurement accuracy of case load.
The reversing valve unit action characteristic detection device further comprises a laser displacement sensor 10 for measuring the displacement of the valve core 1, before the displacement of the valve core 1 is tested, the reversing coil 2 on one side, which does not need the fixed support 8, of the valve body 4 is firstly detached, the head end of the valve core 1 is exposed outside the valve body 4, the laser displacement sensor 10 is arranged on one side of the head end of the valve core 1, the laser displacement sensor 10 is aligned to the head end of the valve core 1, in the process of measuring the load of the valve core 1, the displacement of the valve core 1 is indirectly measured by measuring the distance change between the valve core 1 and the laser displacement sensor 10, at the moment, the change data of the valve core displacement along with time is collected through the data acquisition and processing module 11, and subsequent analysis is carried out. The laser displacement sensor 10 constitutes a spool displacement sensor for measuring the displacement of the spool. Of course, in other embodiments, the spool displacement sensor may also be a grating ruler or an eddy current sensor.
In this embodiment, after the measuring rod 5 contacts the valve core 1 and when the driving force of the moving iron 3 exceeds the sliding resistance of the valve core 1 in the valve body 4, the valve core 1 starts to slide, and when the valve core 1 is static relative to the valve body 4 and generates a displacement critical state, the driving force of the moving iron 3 on the measuring rod 5, that is, the driving force measured by the pressure sensor 9, is the sliding load of the valve core 1 in the valve body 4. Of course, in other embodiments, the sliding load of the valve element 1 may be determined from the acceleration of the valve element 1.
After the valve core 1 finishes acting and an oil path is correspondingly changed by the reversing valve, the breaker main fracture 14 correspondingly acts, and in order to measure the action characteristic of the breaker main fracture 14 to judge whether the operating mechanism main fracture is in fault or whether the oil path between the reversing valve and the operating mechanism main fracture is blocked, in this embodiment, a grating displacement sensor 15 is further arranged at a main transmission rod of a hydraulic operating mechanism of the breaker to measure the displacement parameter of the main transmission rod, and meanwhile, a data acquisition and processing module 11 is used for carrying out subsequent analysis on the change data of the main transmission rod displacement measured by the grating displacement sensor 15 along with time, wherein the main transmission rod of the hydraulic operating mechanism of the breaker forms a moving end of the operating mechanism. Of course, in other embodiments, the grating displacement sensor 15 may be disposed at any position of the moving end of the hydraulic operating mechanism.
The measured data are collected through the data acquisition processing module 11, the action characteristic curve of the reversing valve unit collected by the data acquisition unit 11 is shown in fig. 4, wherein a curve A is a displacement curve of a main transmission rod of the hydraulic operating mechanism, a curve B is a valve core displacement curve of the reversing valve, a curve C is a valve core action load curve of the reversing valve, and a curve D is a reversing coil power-on time curve; specifically, the detected action characteristic curve of the reversing valve is compared with a standard action characteristic curve and design parameters in normal operation, a suspected fault point of the reversing valve unit is searched, for example, the time interval between the moment when the reversing coil 2 is through-flowing and the moment when the valve core 1 starts to act is too long, it is judged that the action resistance borne by the valve core 1 of the reversing valve at the beginning of the action exceeds the design value possibly, or the reversing coil 2 fails to smoothly output the pushing force to the valve core 1 of the reversing valve due to various reasons, if the condition occurs, the fault point is judged by combining the output value of the pressure sensor 9, if the output value is normal, the primary reversing coil 2 is considered to be in fault, if the output value is too large, the position of the valve core 1 of the reversing valve is considered to be in fault primarily, according to the steps, the fault point of the reversing valve can be preliminarily judged, and then the fault point is disassembled, inspected and maintained in a targeted manner.
The method for measuring the action characteristic of the reversing valve unit by adopting the device for measuring the action characteristic of the reversing valve unit comprises the following steps: before measurement, the reversing coils 2 on two sides of the valve body 4 of the reversing valve are detached, then the support 8 and the support sleeve 7 are installed on one side of the valve body 4 of the reversing valve, the reversing coils 2 are installed on one side, where the support 8 is fixed, of the valve body 4 of the reversing valve, the head end of the valve core 1 is exposed out of the valve body 4 of the reversing valve, the head end of the valve core 1 is opposite to the laser displacement sensor 10, and preparation work before measurement is completed.
Then, an action instruction signal is sent to the reversing coil 2 through the data acquisition processing module 11, data acquisition is started at the moment when the action instruction signal is sent through the data acquisition processing module 11, the reversing coil 2 is electrified to push the moving iron 3, further, the valve core 1 is pushed to move, load data and valve core displacement data which are measured through the pressure sensor 9 and the laser displacement sensor 10 are sent to the data acquisition processing module 11, the data acquisition processing module 11 acquires the current change condition of the reversing coil 2, after the valve core 1 finishes acting and an oil circuit of the reversing valve is correspondingly changed, a main fracture 14 of the circuit breaker correspondingly acts, and moving end displacement data which are measured through the grating displacement sensor 15 and are of a main transmission rod are sent to the data acquisition processing module 11, and a motion characteristic curve graph of the reversing valve is obtained.
The method for measuring the action characteristics of the reversing valve unit by using the device for measuring the action characteristics of the reversing valve unit is a specific embodiment of the method for detecting the action characteristics of the reversing valve unit.
The embodiment 2 of the apparatus for measuring the operating characteristics of the directional control valve unit of the present invention is different from the embodiment 1 of the apparatus for measuring the operating characteristics of the directional control valve unit of the present invention only in that: the valve core displacement measuring unit can also be an eddy current displacement sensor which is arranged in the valve body and is sleeved on the valve core at intervals.
The embodiment 3 of the apparatus for measuring the behavior characteristics of the directional control valve unit of the present invention is different from the embodiment 1 of the apparatus for measuring the behavior characteristics of the directional control valve unit of the present invention only in that: the pressure sensor is attached to the end face of the valve core, which faces the moving iron.
Claims (10)
1. The method for detecting the action characteristic of the reversing valve unit is characterized by comprising the following steps: the method comprises the following steps: (1) sending a driving signal for driving a driving coil of the reversing valve to act, recording the sending time of the driving signal, and measuring the data of the current of the coil changing along with the time; (2) measuring the displacement and the load of the valve core to obtain data of the valve core displacement and the valve core load respectively related to time change; (3) and analyzing the measured data to obtain the action characteristic of the reversing valve.
2. The method for detecting the behavior characteristics of the directional valve unit according to claim 1, wherein: and (3) measuring the displacement of the movable end of the operating mechanism in the step (2) to obtain data of the displacement of the movable end relative to time change.
3. The action characteristic detection device of the reversing valve unit is characterized in that: the device comprises a valve core displacement sensor for measuring the displacement of the valve core, a coil detection unit for detecting the current change of the coil, a pressure sensor for measuring the load of the valve core by measuring the driving force for driving the valve core and a data acquisition and processing module for acquiring and analyzing the measurement signals measured by the coil detection unit, the displacement sensor and the pressure sensor, wherein the pressure sensor is arranged between the valve core and a moving iron in the coil.
4. The apparatus for detecting behavior characteristics of a directional valve unit according to claim 3, characterized in that: the reversing valve unit action characteristic detection device further comprises a movable end displacement sensor used for measuring the movable end displacement of the operating mechanism.
5. The directional valve unit behavior characteristic detection device according to claim 3 or 4, characterized in that: the reversing valve unit action characteristic detection device further comprises a support which is used for being fixed relative to the valve body, a measuring rod which is used for being arranged between the valve core and the moving iron of the coil is assembled on the support in a sliding mode, the two ends of the measuring rod are respectively a moving iron matching end and a valve core matching end which are used for being in top pressure fit with the moving iron and the valve core so that the moving iron drives the valve core to move through the measuring rod, and the pressure sensor is arranged on the moving iron matching end or the valve core matching end of the measuring rod.
6. The apparatus for detecting behavior characteristics of a directional valve unit according to claim 5, characterized in that: the valve core displacement sensor is a laser displacement sensor which is arranged at one end of the valve core far away from the measuring rod and is arranged on the outer side of the valve body.
7. The apparatus for detecting behavior characteristics of a directional valve unit according to claim 5, characterized in that: and the support is provided with a support fixing hole for a connecting screw rod for fixing the valve body and the coil to penetrate through.
8. The apparatus for detecting an actuation characteristic of a directional valve unit according to claim 7, wherein: the support comprises a support body and support supporting structures arranged on two sides of the support body along the extending direction of the measuring rod, the support supporting structures and the support body are both provided with support fixing holes, and the measuring rod is assembled on the support body in a sliding mode.
9. The apparatus for detecting behavior characteristics of a directional valve unit according to claim 5, characterized in that: the support is provided with a protective sleeve in a penetrating mode, and a protective sleeve hole in sliding fit with the measuring rod is formed in the protective sleeve so that the measuring rod can be assembled on the support in a sliding mode.
10. The apparatus for detecting an actuation characteristic of a directional valve unit according to claim 9, wherein: and a wear-resistant lubricating layer is arranged on the inner hole wall of the protective sleeve.
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| CN201810720133.4A CN110671390B (en) | 2018-07-03 | 2018-07-03 | Method and device for detecting action characteristics of reversing valve unit |
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| CN201810720133.4A CN110671390B (en) | 2018-07-03 | 2018-07-03 | Method and device for detecting action characteristics of reversing valve unit |
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| CN110671390B CN110671390B (en) | 2020-11-20 |
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| CN115791149A (en) * | 2023-01-31 | 2023-03-14 | 博鼎精工智能科技(山东)有限公司 | Multichannel conversion valve intelligent test system |
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| CN110671390B (en) | 2020-11-20 |
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