阅读说明：本技术 电磁先导阀测试系统和顶杆推力测试方法 (Electromagnetic pilot valve test system and ejector rod thrust test method ) 是由 李俊士 刘文超 郭资鉴 王松 刘宇航 吕洪磊 孔祥凯 苏春阳 于 2021-07-19 设计创作，主要内容包括：本发明提供了一种电磁先导阀测试系统和顶杆推力测试方法,测试系统包括依次连通的动力源、比例阀、增压器、被试电磁先导阀和第一蓄能组件,增压器与被试电磁先导阀之间设置有第二蓄能组件,被试电磁先导阀上设置有可调电源和测试组件,测试组件用于检测被试电磁先导阀当中包括顶杆推力等运行参数。根据本发明实施例的电磁先导阀测试系统和顶杆推力测试方法,能够测得电磁先导阀在工作过程中的顶杆推力,通过该推力值大小可了解和计算被试阀阀芯的各项参数。(The invention provides an electromagnetic pilot valve test system and a method for testing the thrust of a mandril. According to the electromagnetic pilot valve testing system and the ejector rod thrust testing method, the ejector rod thrust of the electromagnetic pilot valve in the working process can be tested, and various parameters of the valve element of the tested valve can be known and calculated through the magnitude of the thrust value.)

1. The electromagnetic pilot valve testing system is characterized by comprising a power source, a proportional valve, a supercharger, a tested electromagnetic pilot valve and a first energy storage assembly which are sequentially communicated, wherein a second energy storage assembly is arranged between the supercharger and the tested electromagnetic pilot valve, an adjustable power supply and a testing assembly are arranged on the tested electromagnetic pilot valve, and the testing assembly is used for detecting the operation parameters of the tested electromagnetic pilot valve; the upper computer is electrically connected with the proportional valve, the first energy storage assembly, the tested electromagnetic pilot valve and the testing assembly in a wired or wireless mode;

the testing assembly further comprises an actuator, a force sensor and a distance measuring sensor, the actuator is used for driving the electromagnetic valve ejector rod to act, the force sensor is used for detecting the thrust of the tested electromagnetic pilot valve ejector rod, and the distance measuring sensor is used for detecting the displacement of the tested electromagnetic pilot valve ejector rod.

2. The electromagnetic pilot valve testing system of claim 1, wherein the actuator is a proportional electromagnet.

3. The electromagnetic pilot valve test system of claim 1, wherein the ranging sensor is a laser rangefinder.

4. The electromagnetic pilot valve testing system of claim 1, wherein the testing assembly comprises a voltage sensor, a current sensor, a first pressure sensor and a second pressure sensor, the voltage sensor and the current sensor are configured to detect an operating parameter of the adjustable power supply, and the first pressure sensor and the second pressure sensor are configured to detect pressures at an inlet and an outlet of the tested electromagnetic pilot valve, respectively.

5. The electromagnetic pilot valve testing system of claim 1, wherein the second accumulator assembly comprises a reversing valve and an accumulator.

6. The electromagnetic pilot valve testing system according to claim 1, wherein a filter and a check valve are disposed between the booster and the tested electromagnetic pilot valve.

7. The electromagnetic pilot valve testing system of claim 1, wherein the power source is a gas source, the booster is a gas-liquid booster pump or a pneumatic booster cylinder, and the proportional valve is an electrical proportional regulating valve.

8. An electromagnetic pilot valve push rod thrust test method, characterized by comprising the electromagnetic pilot valve test system of any one of claims 1-7, and comprising the steps of:

s210, adjusting the operating voltage of the ratio operator so that the operating voltage gradually increases from 0V;

s220, detecting and recording the push rod thrust and the push rod displacement curve of the tested electromagnetic pilot valve;

and S230, when the ejector rod displacement curve is detected to be mutated, the test is finished.

9. The electromagnetic pilot valve push rod thrust test method of claim 7, further comprising the steps of:

s205, adjusting the inlet pressure of the tested electromagnetic pilot valve to a preset value.

Technical Field

The invention relates to the technical field of hydraulic valve testing, in particular to an electromagnetic pilot valve testing system and a push rod thrust testing method.

Background

The electromagnetic valve is used as an actuating element of an industrial process automatic control system, can automatically open and close the valve after being electrified, realizes on-off control of fluid media in a pipeline, and is widely applied to the technical fields of metallurgy, petrifaction and the like. In an electro-hydraulic control system of a hydraulic support of a coal mine comprehensive mining working face, an electromagnetic pilot valve is one of key elements, and the performance and reliability of the electromagnetic pilot valve directly influence the reliability and safety of the comprehensive mining working face. Therefore, before use or during maintenance, corresponding performance tests are often required to be performed on the electromagnetic pilot valve.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems:

the critical thrust of the electromagnetic pilot valve and the like are not required to be tested in the existing test, and due to the structure of the electromagnetic pilot valve and the structure of the force transducer, the electromagnetic pilot valve is inconvenient to be directly connected with a sensor between the electromagnet ejector rod and the amplifying lever. The critical thrust for opening the valve core is very meaningful to test, and some dynamic and static characteristics of the valve core of the pilot valve can be known through a mechanical equation.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides an electromagnetic pilot valve testing system and a push rod thrust testing method.

The electromagnetic pilot valve testing system comprises a power source, a proportional valve, a supercharger, a tested electromagnetic pilot valve and a first energy storage assembly which are sequentially communicated, wherein a second energy storage assembly is arranged between the supercharger and the tested electromagnetic pilot valve, an adjustable power supply and a testing assembly are arranged on the tested electromagnetic pilot valve, and the testing assembly is used for detecting the operation parameters of the tested electromagnetic pilot valve; the upper computer is electrically connected with the proportional valve, the first energy storage assembly, the tested electromagnetic pilot valve and the testing assembly in a wired or wireless mode;

the testing assembly further comprises an actuator, a force sensor and a distance measuring sensor, the actuator is used for driving the electromagnetic valve ejector rod to act, the force sensor is used for detecting the thrust of the tested electromagnetic pilot valve ejector rod, and the distance measuring sensor is used for detecting the displacement of the tested electromagnetic pilot valve ejector rod.

According to the electromagnetic pilot valve testing system provided by the embodiment of the invention, by arranging the proportional valve, the supercharger and the energy storage assembly, other power sources can be used for replacing a liquid source, the defects of high testing energy consumption, serious abrasion and large size of testing equipment caused by a liquid source pump station are avoided, and the electromagnetic pilot valve testing system is high in testing efficiency and low in energy consumption.

In the embodiment of the invention, the actuator is a proportional electromagnet.

In an embodiment of the present invention, the distance measuring sensor is a laser distance measuring instrument.

In an embodiment of the present invention, the testing component includes a voltage sensor, a current sensor, a first pressure sensor and a second pressure sensor, where the voltage sensor and the current sensor are used to detect an operating parameter of the adjustable power supply, and the first pressure sensor and the second pressure sensor are respectively used to detect pressures at an inlet and an outlet of the tested electromagnetic pilot valve.

In an embodiment of the invention, the second energy storage assembly comprises a reversing valve and an energy storage.

In the embodiment of the invention, a filter and a one-way valve are arranged between the supercharger and the tested electromagnetic pilot valve.

In the embodiment of the invention, the power source is an air source, the supercharger is a gas-liquid booster pump or a pneumatic booster cylinder, and the proportional valve is an electric proportional regulating valve.

According to the electromagnetic pilot valve ejector rod thrust test method of the embodiment of the second aspect of the invention, the test method is based on the electromagnetic pilot valve test system and comprises the following steps:

s210, adjusting the operating voltage for driving the ejector rod so that the operating voltage gradually increases from 0V;

s220, detecting and recording the push rod thrust and the push rod displacement curve of the tested electromagnetic pilot valve;

and S230, when the ejector rod displacement curve is detected to be mutated, the test is finished.

In the embodiment of the invention, the method further comprises the following steps:

s205, adjusting the inlet pressure of the tested electromagnetic pilot valve to a preset value.

Drawings

FIG. 1 is a schematic diagram of an electromagnetic pilot valve testing system according to an embodiment of the first aspect of the present invention;

FIG. 2 is a schematic diagram of the operation of the second embodiment of the present invention in the push rod thrust test.

Reference numerals:

1. a power source; 2. a proportional valve; 3. a supercharger; 4. a filter; 5. a one-way valve; 6. a diverter valve; 7. an accumulator; 8. an adjustable power supply; 9. a voltage sensor and a current sensor; 10; a first energy storage assembly; 11. a first pressure sensor; 12. a second pressure sensor; 13. a tested electromagnetic pilot valve; 21. a top rod; 22. a force sensor; 23. a proportional electromagnet; 24. and a distance measuring sensor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An electromagnetic pilot valve testing system according to an embodiment of the first aspect of the invention is described below with reference to fig. 1.

As shown in fig. 1, the electromagnetic pilot valve testing system according to the embodiment of the first aspect of the present invention includes a power source 1, a proportional valve 2, a supercharger 3, a tested electromagnetic pilot valve 13, and a first energy storage assembly, which are sequentially communicated, and a second energy storage assembly is further disposed between the supercharger 3 and the tested electromagnetic pilot valve 13. The power source 1 provides a test pressure for the whole test system, and the proportional valve 2 and the supercharger 3 are used for adjusting the pressure of the power source 1 so that the pressure at the inlet of the tested electromagnetic pilot valve 13 reaches a preset value. The booster 3 is divided into two parts that do not communicate with each other with the test pipeline in the middle of the whole test system, including 3 front side pipelines of booster (the one side that is close to power supply 1) and 3 rear side pipelines of booster (the one side that is close to tested electromagnetism pilot valve 13), booster 3 is used for realizing pressure conduction between front side pipeline and rear side pipeline, thereby make and be tested electromagnetism pilot valve 13 and can test in normal hydraulic pressure environment, and the front side pipeline that provides power does not receive hydraulic pressure environment's restriction.

The tested electromagnetic pilot valve 13 is provided with an adjustable power supply 8 and a testing assembly, the testing assembly is used for detecting the operation parameters of the tested electromagnetic pilot valve 13, and the tested parameters comprise pressure, current, voltage and the like. The electromagnetic pilot valve test system further comprises an upper computer, the upper computer is electrically connected to the proportional valve 2, the first energy storage assembly, the tested electromagnetic pilot valve 13 and the test assembly in a wired or wireless mode, the upper computer can be arranged near the electromagnetic pilot valve test system, so that a person can carry out field operation, and the upper computer can also be arranged in a remote or superior system of the electromagnetic pilot valve test system, such as a remote control room and the like, so that remote test operation can be carried out.

According to the electromagnetic pilot valve testing system provided by the embodiment of the invention, by arranging the proportional valve 2, the supercharger 3 and the energy storage assembly, other power sources 1 can be used for replacing a liquid source, the defects of high testing energy consumption, serious abrasion and large size of testing equipment caused by a liquid source pump station are avoided, and the testing efficiency is high and the energy consumption is low.

In an embodiment of the present invention, the test assembly comprises a voltage sensor, a current sensor, a first pressure sensor 10; a first energy storage assembly; 11 and a second pressure sensor 12, the voltage sensor and the current sensor 9 being adapted to detect an operating parameter of the adjustable power supply 8, the first pressure sensor 10; a first energy storage assembly; 11 and a second pressure sensor 12 are used to detect the pressure at the inlet and outlet, respectively, of the electromagnetic pilot valve 13 under test.

In the embodiment of the invention, the testing assembly further comprises a force sensor and a distance measuring sensor, wherein the force sensor is used for detecting the thrust of the ejector rod of the tested electromagnetic pilot valve 13, and the distance measuring sensor is used for detecting the displacement of the ejector rod of the tested electromagnetic pilot valve 13.

Optionally, for different detection items, the test component in the electromagnetic pilot valve test system may be a voltage sensor, a current sensor, and a first pressure sensor 10; a first energy storage assembly; 11. one or more of the second pressure sensor 12, force sensor and distance sensor may be added, as may other kinds of sensors, such as temperature sensors, flow sensors, etc.

In the present embodiment, the second accumulator assembly comprises a reversing valve 6 and an accumulator 7. The reversing valve 6 can be a two-position two-way valve, one end of which is communicated with the energy accumulator 7, and the other end of which is communicated with the liquid storage container. When the test is carried out, the energy accumulator 7 is not communicated with the liquid storage container, so that a relatively closed cavity is formed among the energy accumulator 7, the tested electromagnetic pilot valve 13 and the first energy storage assembly, and the pressure intensity in the cavity is increased by the working of the supercharger 3 so as to reach a preset value. After the test is finished, the two-position two-way valve acts to enable the energy accumulator 7 to be communicated with the liquid storage container, and because the pressure at the liquid storage container is small, the high-pressure liquid in the cavity is decompressed, and the test is finished.

In the embodiment of the invention, a filter 4 and a one-way valve 5 are arranged between the supercharger 3 and the tested electromagnetic pilot valve 13. The one-way valve 5 is arranged, so that liquid flowing to the tested electromagnetic pilot valve 13 cannot flow back to the supercharger 3, the supercharger 3 can stop working after supercharging, and the pressure at the tested electromagnetic pilot valve 13 can be continuously maintained.

In the embodiment of the invention, the power source 1 is an air source, the supercharger 3 is a gas-liquid booster pump or a pneumatic booster cylinder, and the proportional valve 2 is an electric proportional regulating valve.

According to the electromagnetic pilot valve reversing characteristic testing method provided by the embodiment of the invention, the testing method is based on the electromagnetic pilot valve testing system and comprises the following steps:

s110, opening an air source, adjusting an electric proportional control valve, and enabling a supercharger to work to enable the inlet pressure of the tested electromagnetic pilot valve to be kept at a preset value;

s120, adjusting the tested electromagnetic pilot valve to perform reversing action;

and S130, detecting and recording an outlet pressure curve, a voltage curve, a current curve and a valve rod displacement curve of the tested electromagnetic pilot valve.

In the embodiment of the invention, a one-way valve is arranged between the first energy storage assembly and the supercharger, and the step S10 comprises the following steps:

s112, opening an air source, adjusting an electric proportional control valve, and enabling a supercharger to work to enable the inlet pressure of the tested electromagnetic pilot valve to reach a preset value;

and S114, closing the electric proportional pressure regulating valve, stopping the supercharger, and keeping the inlet pressure of the tested electromagnetic pilot valve at a preset value.

When carrying out the test of electromagnetism pilot valve switching-over characteristic, at first through host computer remote adjustment electrical proportion air-vent valve, will be tried electromagnetic pilot valve entry pressure and adjust to the default (like electromagnetism pilot valve nominal pressure) and detect through first pressure sensor, rethread host computer stops adjusting electrical proportion air-vent valve, and the booster stop work is tried electromagnetic pilot valve entry pressure and is kept invariable, and second energy storage subassembly plays the energy storage effect. The tested electromagnetic pilot valve is remotely adjusted to be switched over through an upper computer, a real-time data curve of the second pressure sensor, the voltage sensor, the current sensor and the distance measuring sensor is displayed through the upper computer, the switching-over characteristic of the tested electromagnetic pilot valve is observed, the tested electromagnetic pilot valve is controlled to stop fantasy through the upper computer after a certain time, and liquid in the first energy storage assembly flows back to the liquid storage container through the tested electromagnetic pilot valve to stop testing.

Furthermore, the output voltage of the adjustable power supply is remotely adjusted through the upper computer, and the performance of the tested electromagnetic pilot valves under different voltages can be verified.

According to the electromagnetic pilot valve ejector rod thrust test method of the embodiment of the second aspect of the invention, the test method is based on the electromagnetic pilot valve test system and comprises the following steps:

s210, adjusting the operating voltage for driving the ejector rod so that the operating voltage gradually increases from 0V;

s220, detecting and recording the push rod thrust and the push rod displacement curve of the tested electromagnetic pilot valve;

and S230, when the ejector rod displacement curve is detected to be mutated, the test is finished.

In the embodiment of the invention, the method further comprises the following steps:

s205, adjusting the inlet pressure of the tested electromagnetic pilot valve to a preset value.

As shown in fig. 2, when the electromagnetic pilot valve ejector 21 operates the critical thrust test, the ejector 21 of the proportional electromagnet 23 is connected to the electromagnetic pilot valve ejector 21 to be tested through the force sensor 22, the proportional electromagnet 23 continuously sends a current control signal through the upper computer, the operating voltage gradually increases from 0V, and further the driving force received by the ejector 21 gradually increases, the distance measuring sensor 24 detects the displacement curve of the ejector 21, since the thrust of the ejector 21 is small under a small current, in the process of pushing the electromagnetic pilot valve ejector 21 to move downwards, when the electromagnetic pilot valve amplifying ejector 21 is contacted, the thrust is insufficient to operate the valve core of the electromagnetic pilot valve to be tested, the ejector 21 is limited, the thrust of the electromagnetic pilot valve ejector 21 to be tested continuously increases as the control current gradually increases, and the force and the displacement curve (monitored by the distance measuring sensor 24) of the ejector 21 are recorded by the upper computer, when the thrust is greater than the valve core opening pressure, the valve core is opened, the displacement of the ejector rod 21 has instantaneous change, the displacement transient moment of the ejector rod 21 is recorded through the distance measuring sensor 24, and the numerical value of the force measuring sensor 22 at the moment is positioned through the characteristic curve, so that the thrust of the ejector rod 21 of the tested electromagnetic pilot valve can be tested. The push rod 21 thrust during the action of the valve core under different pressure levels can be measured by adjusting different pressure values of the hydraulic system, and various indexes of the tested electromagnetic pilot valve core can be known and calculated through the magnitude of the thrust value.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.