CN114878083A - Electromagnetic valve fault judgment method and electromagnetic valve test platform - Google Patents

Abstract

The electromagnetic valve fault judging method comprises the steps of opening or closing an electromagnetic coil and filling gas into a control air passage, judging whether a first air chamber, a second air chamber, a third air chamber, a first exhaust passage and a second exhaust passage leak gas or not, opening or closing the electromagnetic coil and filling gas into the control air passage and the third air chamber, and judging whether the first air chamber, the second air chamber, the first exhaust passage and the second exhaust passage leak gas or not. Through the technical scheme, when the electromagnetic valve has the air tightness fault, the reason of the air tightness fault of the electromagnetic valve can be accurately judged, the inconvenience in maintenance and the long maintenance period caused by the reason of the fault of the uncertain electromagnetic valve are avoided, and after maintenance, whether the air tightness fault still exists in the maintained electromagnetic valve can be detected through the electromagnetic valve fault judging method, so that the secondary damage to equipment after the electromagnetic valve with uncertain maintenance quality is directly installed on the equipment is avoided.

Description

Electromagnetic valve fault judgment method and electromagnetic valve test platform

Technical Field

The disclosure relates to the field of electromagnetic valves, in particular to an electromagnetic valve fault judgment method and an electromagnetic valve test platform.

Background

The solenoid valve is as the essential element of control hydraulic system and pneumatic system break-make, normal operation to industrial and mining equipment plays the important role, use extensively in all kinds of equipment, fragile in the in-service use process, difficult inspection and failure diagnosis are inaccurate, and need detect the restoration quality after the restoration is accomplished, can only test the solenoid valve in the equipment again, can not test alone many times to certain solenoid valve after the restoration, lead to detection efficiency low, install simultaneously densely, it leads to dismantling and installing to overhaul the little result in the inspection space, influence the improvement of maintenance efficiency.

Disclosure of Invention

The present disclosure is directed to a solenoid valve fault determining method and a solenoid valve testing platform, which at least partially solve the problems of the related art.

In order to achieve the above object, the present disclosure provides a method for determining a failure of a solenoid valve, the solenoid valve including a valve body having a first valve spool and a pilot valve controlling movement of the first valve spool, the valve body including a first air chamber, a second air chamber, and a third air chamber, the first valve spool being translatably disposed in the valve body to communicate either the first air chamber or the second air chamber with the third air chamber,

the valve body is provided with a first groove and a second groove which are used for accommodating two end parts of the first valve core respectively, a control air passage which connects the outside of the valve body to the pilot valve, a first air inlet channel which connects the first groove to the pilot valve and a second air inlet channel which connects the second groove to the pilot valve; the pilot valve is provided with a second valve core, an electromagnetic coil used for controlling the movement of the second valve core, a first exhaust passage and a second exhaust passage, wherein the first exhaust passage and the second exhaust passage respectively extend from the outer end face of the pilot valve to the second valve core and are used for exhausting redundant gas when the second valve core moves, and the second valve core is configured as follows:

when the electromagnetic coil is opened, the control air passage is communicated with the first air inlet passage, and the second air inlet passage is communicated with the second air outlet passage;

or the control air passage is communicated with the second air inlet passage when the electromagnetic coil is closed, and the first air inlet passage is communicated with the first exhaust passage,

the method comprises any one or more of the following steps:

opening the electromagnetic coil, filling gas into the control air passage, and judging whether the first air chamber, the third air chamber, the first exhaust passage and the second exhaust passage leak gas or not;

closing the electromagnetic coil, filling gas into the control air passage, and judging whether the second air chamber, the third air chamber, the first exhaust passage and the second exhaust passage leak gas or not;

opening the electromagnetic coil, filling gas into the control air passage and the third air chamber, and judging whether the second air chamber, the first exhaust passage and the second exhaust passage leak gas or not; and

and closing the electromagnetic coil, filling gas into the control air passage and the third air chamber, and judging whether the first air chamber, the first exhaust passage and the second exhaust passage leak gas or not.

Optionally, the step of inflating gas into the control airway comprises: connecting the control gas channel with high-pressure gas;

the step of inflating gas into the control gas duct and the third gas chamber includes: connecting the control gas passage with high pressure gas and connecting the third gas chamber with low pressure gas.

Optionally, the step of opening the electromagnetic coil and inflating gas into the control gas passage and the third gas chamber comprises: sealing the control air passage from the first air chamber;

the step of closing the electromagnetic coil and filling the control air passage and the third air chamber with air comprises the following steps: and sealing the control air passage and the second air chamber.

Optionally, the step of determining whether there is an air leak includes:

and leading the parts of the first air chamber, the second air chamber, the third air chamber, the first exhaust passage and the second exhaust passage, which need to be judged whether air leakage exists, into liquid through pipelines.

Optionally, the pilot valve has a manual adjustment mode for manually adjusting the position of the second valve spool in the absence of the solenoid,

prior to controlling the opening and closing of the solenoid, the method further comprises: and opening the manual regulation mode, filling gas into the control air passage and regulating the position of the second valve core, and judging whether the pilot valve is blocked or not according to the flexible action of the first valve core.

A second objective of the present disclosure is to provide a solenoid valve testing platform, configured to execute any one of the above solenoid valve fault determination methods, where the testing platform includes a base, where the base is provided with a power module, a pressure gas module, and multiple sets of installation modules, where the installation modules are used to fix and install the solenoid valve, and the pressure gas module is connected to the installation modules and is used to charge pressure gas into the control air channel and/or the third air chamber.

Optionally, each set of the mounting modules is provided with an openable air passage opening respectively communicated with the first air chamber, the second air chamber, the third air chamber and the control air passage.

Optionally, a sensitivity detection module is further disposed on the base, the sensitivity detection module includes a signal generation device and a plurality of sets of counting devices, the signal generation device is electrically connected to the electromagnetic coil to control the opening or closing of the electromagnetic coil, and the counting devices are used for counting the number of times the electromagnetic coil is opened.

Optionally, the signal generating device includes a rotating platform, a detecting piece disposed at an edge of the rotating platform, and a first sensor disposed at an interval on the rotating platform and radially outside the rotating platform, wherein the first sensor generates a signal and counts every time the detecting piece passes by the first sensor.

Optionally, the counting assembly is including fixing support on the test platform, can rotationally connect in vertical direction pendulum rod on the support and the vertical open ventilation pipe way in extension and both ends, the lower extreme of ventilation pipe way with first air chamber or second air chamber intercommunication, the one end cover of pendulum rod is in the last mouth of pipe of ventilation pipe way, the test platform still includes and closes on the second sensor that the mouth of pipe set up is used for the pendulum rod breaks away from count when going up the mouth of pipe.

Optionally, the bottom of the other end of the swing rod is further provided with a buffer block, an upper sealing piece is arranged at a position, in contact with the pipe orifice of the ventilation pipeline, on the swing rod, and a lower sealing piece is arranged at the edge of the pipe orifice of the ventilation pipeline in a surrounding mode.

Through the technical scheme, when the electromagnetic valve has the air tightness fault, the reason of the air tightness fault of the electromagnetic valve can be accurately judged by implementing the electromagnetic valve fault judging method, so that the electromagnetic valve can be accurately maintained, the inconvenience in maintenance and the long maintenance period caused by the reason of the fault of the uncertain electromagnetic valve are avoided, and after the electromagnetic valve is maintained, whether the air tightness fault exists in the maintained electromagnetic valve can be detected by the electromagnetic valve fault judging method, the electromagnetic valve is re-installed into equipment after the electromagnetic valve is determined to be successfully maintained, and the secondary damage to the equipment after the electromagnetic valve with uncertain maintenance quality is directly installed into the equipment is avoided.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic structural diagram of a solenoid valve testing platform provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a gas monitoring device provided in an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a solenoid valve provided by an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a solenoid valve provided in an exemplary embodiment of the present disclosure in a solenoid-open state;

FIG. 5 is a schematic structural diagram of a solenoid valve provided in an exemplary embodiment of the present disclosure in a solenoid-off state;

fig. 6 is a flowchart of a solenoid valve failure determination method provided by an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-an electromagnetic valve, 11-a valve body, 111-a first air chamber, 112-a second air chamber, 113-a third air chamber, 12-a first valve core, 121-a first groove, 122-a second groove, 13-a first air inlet channel, 14-a second air inlet channel, 3-a pilot valve, 31-a control air channel, 32-a second valve core, 33-an electromagnetic coil, 34-a first air outlet channel, 35-a second air outlet channel, 4-a base, 41-a power supply module, 42-a pressure gas module, 421-a high pressure outlet, 422 a low pressure outlet, 423-a pressure regulating valve, 43-an installation module, 431-an air channel port, 5-a signal generating device, 51-a rotary platform, 52-a first sensor, 53-a detection sheet and 54-a frequency converter, 6-counting device, 61-swing rod, 62-bracket, 63-ventilation pipeline, 64-upper sealing sheet, 65-lower sealing sheet, 66-buffer block and 67-second sensor.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the use of the directional terms such as "upper, lower and bottom" generally refers to the orientation of the relevant components in the actual use state, and specifically refers to the drawing direction of fig. 1. "inner and outer" refer to the inner and outer of the respective component profiles. In addition, when the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements, unless otherwise indicated. The terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for sequential or importance.

The present disclosure provides a failure determination method for an electromagnetic valve, as shown in fig. 3 to 5, an electromagnetic valve 1 includes a valve body 11 having a first valve spool 12 and a pilot valve 3 controlling movement of the first valve spool 12, the valve body 11 includes a first air chamber 111, a second air chamber 112 and a third air chamber 113, the first valve spool 12 is translatably disposed in the valve body 11 to selectively communicate the first air chamber 111 and the second air chamber 112 with the third air chamber 113,

the valve body 11 is provided with a first groove 121 and a second groove 122 which are used for accommodating two end parts of the first valve core 12 respectively, a control air passage 31 which communicates the outside of the valve body 11 to the pilot valve 3, a first air inlet channel 13 which communicates the first groove 121 to the pilot valve 3, and a second air inlet channel 14 which communicates the second groove 122 to the pilot valve 3; the pilot valve 3 has a second valve element 32, a solenoid 33 for controlling the movement of the second valve element 32, a first exhaust passage 34, and a second exhaust passage 35, the first exhaust passage 34 and the second exhaust passage 35 respectively extending from an outer end surface of the pilot valve 3 to the second valve element 32 for exhausting surplus gas when the second valve element 32 moves, wherein the second valve element 32 is configured to:

when the electromagnetic coil 33 is opened, the control air duct 31 is communicated with the first air inlet duct 13, and the second air inlet duct 14 is communicated with the second air outlet duct 35;

or when the solenoid 33 is closed, the control air duct 31 is communicated with the second air inlet duct 14, and the first air inlet duct 13 is communicated with the first exhaust air duct 34. That is, the solenoid valve of the present disclosure is a two-position three-way solenoid valve having a pilot valve, and the basic working principle thereof is not described herein.

The solenoid valve fault judgment method provided by the disclosure comprises any one or more of the following steps:

opening the electromagnetic coil 33, filling gas into the control gas passage 31, and judging whether the first gas chamber 111, the third gas chamber 113, the first exhaust passage 34 and the second exhaust passage 35 leak gas or not;

closing the electromagnetic coil 33, filling gas into the control gas passage 31, and judging whether the second gas chamber 112, the third gas chamber 113, the first exhaust passage 34 and the second exhaust passage 35 leak gas or not;

opening the electromagnetic coil 33, filling gas into the control gas passage 31 and the third gas chamber 113, and judging whether the second gas chamber 112, the first exhaust passage 34 and the second exhaust passage 35 leak gas or not; and

the electromagnetic coil 33 is closed, gas is filled into the control gas passage 31 and the third gas chamber 113, and whether the first gas chamber 111, the first exhaust passage 34 and the second exhaust passage 35 are leaked or not is judged.

Through the technical scheme, when the electromagnetic valve 1 has an air tightness fault, the reason of the air tightness fault of the electromagnetic valve 1 can be accurately judged by implementing the electromagnetic valve fault judging method, so that accurate maintenance is realized, and the inconvenience in maintenance and long maintenance period caused by the fact that the fault of the electromagnetic valve 1 is uncertain are avoided. After maintenance, whether the maintained electromagnetic valve 1 has an air tightness fault can be detected by the electromagnetic valve fault judging method, the electromagnetic valve 1 is installed back into the equipment after the electromagnetic valve 1 is determined to be successfully maintained, and secondary damage to the equipment after the electromagnetic valve 1 with uncertain maintenance quality is directly installed on the equipment is avoided.

The step of charging the control gas duct 31 with gas may include: connecting the control gas passage 31 with the high pressure gas, and the step of filling the control gas passage 31 and the third gas chamber 113 with the gas may include: the control gas duct 31 is connected to high-pressure gas and the third gas chamber 113 is connected to low-pressure gas. Since the operation of the second valve spool 32 inside the pilot valve 3 requires gas driving and the pilot valve 3 also controls the operation of the first valve spool 12, the pressure of the gas to be charged into the control gas passage 31 is high.

In addition, the step of opening the solenoid 33 and filling the gas into the control gas duct 31 and the third gas chamber 113 may include: the steps of closing the control air duct 31 and the first air chamber 111, closing the electromagnetic coil 33, and filling air into the control air duct 31 and the third air chamber 113 may include: the control air passage 31 and the second air chamber 112 are closed. Closing the control air passage 31 and the first air chamber 111 or the second air chamber 112 can further determine whether the left or right seal of the first valve spool 12 is damaged or not in the case where the right and left seals of the second valve spool 32 have been damaged.

The step of determining whether air is leaked may include:

the parts of the first air chamber 111, the second air chamber 112, the third air chamber 113, the first exhaust passage 34 and the second exhaust passage 35, which need to be judged whether air leakage exists, are led into the liquid through pipelines. The air leakage is generally judged by artificial perception, and the judgment is difficult when the air leakage amount is small, so that the part for judging whether the air leakage exists is introduced into the liquid, and the air leakage degree of the part is judged by judging whether the air bubbles appear in the liquid and the sizes of the air bubbles.

Further, the pilot valve 3 may have a manual adjustment mode for manually adjusting the position of the second spool 32 without disengaging the electromagnetic coil 33, and before controlling the opening and closing of the electromagnetic coil 33, the above-described electromagnetic valve failure determination method further includes: and opening the manual regulation mode, filling gas into the control gas channel 31, regulating the position of the second valve core 32, and judging whether the pilot valve 3 is blocked or not according to the flexible action of the first valve core 12. After the manual adjustment mode is opened, the position of the second valve element 32 can be adjusted and whether the first valve element 12 is flexibly operated or not can be observed, if the first valve element 12 is flexibly operated, the pilot valve 3 works normally, and the electromagnetic valve fault judging method can be implemented, and if the first valve element 12 is not flexibly operated, the pilot valve 3 is possibly blocked, and the electromagnetic valve fault judging method needs to be implemented after the pilot valve 3 is maintained.

The method for determining a failure of a solenoid valve according to the present disclosure will be described in detail with reference to fig. 4 to 6.

Wherein:

a first failure: the seal between the right side of the first spool 12 and the first groove 121 is broken;

and (4) failure II: the seal between the left side of the first spool 12 and the second groove 122 is broken;

and (3) failure three: the seal between the right side of the second spool 32 and the first exhaust passage 34 is broken;

and (4) failure four: the seal between the left side of the second spool 32 and the second exhaust passage 35 is broken;

and (5) failure: the seal between the first air cell 111 and the third air cell 113 is broken;

and (6) failure six: the seal between the second air cell 112 and the third air cell 113 is broken;

and a seventh fault: the primary seal of the second spool 32 is broken;

and eighth failure: the pilot valve 3 is internally clogged.

Opening the manual regulation mode, charging high-pressure gas into the control gas passage 31, regulating the second valve core 32, wherein the second valve core 32 can enable the first inlet channel 13 and the second inlet channel 14 to be communicated with the control gas passage 31 alternatively so as to drive the first valve core 12 to translate, and if the first valve core 12 is inflexible in motion, generating a fault eight: the pilot valve 3 is internally clogged.

Closing the manual regulation mode and opening the electromagnetic coil 33, at this time, as shown in fig. 4, the electromagnetic valve 1, the second valve core 32 can make the first air inlet channel 13 communicate with the control air channel 31, the first groove 121 is filled with air to drive the first valve core 12 to move leftward, the first air chamber 111 communicates with the third air chamber 113, and it is determined whether the first air chamber 111, the third air chamber 113, the first exhaust channel 34 and the second exhaust channel 35 leak air, if the first air chamber 111 and the third air chamber 113 leak air, a failure one occurs, if the first exhaust channel 34 leaks air, a failure three occurs, and if the second exhaust channel 35 leaks air, a failure seven occurs.

When the electromagnetic coil 33 is closed, at this time, the state of the electromagnetic valve 1 is changed from fig. 4 to fig. 5, the second valve core 32 can enable the second air inlet passage 14 to be communicated with the control air passage 31, the second groove 122 is filled with air, the first valve core 12 is driven to move rightwards, the second air chamber 112 is communicated with the third air chamber 113, whether air leaks from the second air chamber 112, the third air chamber 113, the first exhaust passage 34 and the second exhaust passage 35 is judged, if air leaks from the second air chamber 112 and the third air chamber 113, a second fault occurs, if air leaks from the second exhaust passage 35, a fourth fault occurs, and if air leaks from the first exhaust passage 34, a seventh fault occurs.

And then, filling gas into the third gas chamber 113 and opening the electromagnetic coil 33, and judging whether the second gas chamber 112, the first exhaust passage 34 and the second exhaust passage 35 leak gas or not, wherein if the second gas chamber 112 leaks gas, a sixth fault occurs, and if the first exhaust passage 34 leaks gas, a third fault occurs. If the control air passage 31 and the first air chamber 111 are closed at this time and the first exhaust passage 34 still leaks air, it is indicated that a failure one still occurs on the basis of the failure three, after the first air chamber 111 and the control air passage 31 are closed, the air charged from the third air chamber 113 is charged into the pilot valve 3 through the first air inlet passage 13 due to the sealing damage between the right side of the first valve element 12 and the first groove 121, the sealing damage between the right side of the second valve element 32 inside the pilot valve 3 and the first exhaust passage 34 causes the first exhaust passage 34 to leak air, and if the second exhaust passage 35 leaks air, a failure seven occurs.

And closing the electromagnetic coil 33, and judging whether the first air chamber 111, the first exhaust passage 34 and the second exhaust passage 35 leak air or not, wherein if the first air chamber 111 leaks air, a fifth fault occurs, and if the second exhaust passage 35 leaks air, a fourth fault occurs. If the control air passage 31 and the second air chamber 112 are closed at this time and the second exhaust passage 35 still leaks air, it indicates that a failure two occurs on the basis of the failure four, after the second air chamber 112 and the control air passage 31 are closed, the air charged from the third air chamber 113 is charged into the pilot valve 3 through the second air inlet passage 14 due to the sealing damage between the left side of the first valve core 12 and the second groove 122, and the sealing damage between the left side of the second valve core 32 inside the pilot valve 3 and the second exhaust passage 35 causes the second exhaust passage 35 to leak air. If the first exhaust duct 34 leaks, a failure seven occurs.

According to a second aspect of the present disclosure, a solenoid valve testing platform is further provided, as shown in fig. 1, the testing platform includes a base 4, a power module 41, a pressure gas module 42 and a plurality of sets of installation modules are disposed on the base 4, the installation modules are used for fixing and installing the solenoid valve 1, and the pressure gas module 42 is connected with the installation modules and is used for filling pressure gas into the control air channel 31 and/or the third air chamber 113. The test platform is used for executing the electromagnetic valve fault judgment method of any one of the embodiments, and has all the beneficial effects, which are not described herein again. Referring to fig. 1, the pressure gas module 42 may be an air pump and is connected to a pressure regulating valve 423, the pressure regulating valve 423 is provided with a high pressure outlet 421 and a low pressure outlet 422, the high pressure outlet 421 is used for providing pressure gas for the control air passage 31, and the low pressure outlet 422 is used for providing pressure gas for the third air chamber 113. The power module 41 may be provided with two power modules, i.e., a dc power supply and an ac power supply, to adapt to the use conditions of various devices.

Further, each set of the mounting modules may be opened with an openable air passage opening 431 respectively communicated with the first air chamber 111, the second air chamber 112, the third air chamber 113 and the control air passage 31. In this way, the pressure gas module 42 can be directly communicated with the solenoid valve 1 through the gas port 431, and the gas port 431 can be closed, so that the test platform can more conveniently execute the solenoid valve fault judgment method. The port 431 connected to the third air chamber 113 and the control air passage 31 can be opened or closed at any time to control the movement of the first valve core 12. The port 431 connected to the first air chamber 111 and the second air chamber 112 can close the first air chamber 111 or the second air chamber 112 when it has been determined that the failure three or the failure four and it is necessary to further determine whether the left or right seal of the first valve spool 12 is broken.

The base 4 may further be provided with a sensitivity detection module, the sensitivity detection module includes a signal generation device 5 and a plurality of sets of counting devices 6, the signal generation device 5 is electrically connected with the electromagnetic coil 33 to control the opening or closing of the electromagnetic coil 33, and the counting devices 6 are used for counting the opening times of the electromagnetic coil 33. Therefore, the test platform can execute the fault judgment method, and can detect the on-off sensitivity of the electromagnetic valve 1 after the electromagnetic valve 1 is repaired, so that the electromagnetic valve 1 is prevented from being damaged due to air tightness fault maintenance. Specifically, the signal generated by the signal generating device 5 and the signal acquired by the counting device 6 are compared to see whether the preset condition is met, for example, as the following structures of the signal generating device 5 and the counting device 6 are taken as examples, the sensitivity of the solenoid valve 1 is judged by comparing the respective counts of the first sensor 52 and the second sensor 67, the solenoid 33 is opened once and the swing rod 61 is separated from the upper pipe orifice once every two times of signal generation by the signal generating device 5, that is, the ratio of the number of signal generation times to the number of opening times of the solenoid 33 is about 2: 1, which indicates that there is no problem in the sensitivity of the solenoid valve 1.

The signal generating device 5 may include a rotary platform 51, a detecting piece 53 disposed at an edge of the rotary platform 51, and a first sensor 52 disposed at an interval on the rotary platform 51 and radially outside the rotary platform 51, wherein the first sensor 52 generates a signal and counts every time the detecting piece 53 passes the first sensor 52. When the electromagnetic coil 33 receives the signal from the first sensor 52, if the electromagnetic coil 33 is in the open state, the electromagnetic coil 33 will be closed after receiving the signal from the first sensor 52, and if the electromagnetic coil 33 is in the closed state, the electromagnetic coil 33 will be opened after receiving the signal from the first sensor 52. When the signal from the first sensor 52 is too small, an intermediate relay may be connected to the first sensor 52, which amplifies the on/off signal from the first sensor 52 to better control the solenoid 33.

The signal generator 5 may be further provided with a frequency converter 54 capable of controlling the rotation speed of the rotary table 51 to control the frequency of the proximity of the detection piece 53 to the first sensor 52, thereby controlling the frequency and time interval of the operation of the electromagnetic coil 33, or may be provided with a plurality of detection pieces 53, and the frequency and time interval of the operation of the electromagnetic coil 33 may be controlled by changing the distance between the plurality of detection pieces 53, so that the longer the distance between the detection pieces 53 is, the longer the time interval of the state switching of the electromagnetic coil 33 is. The frequency and the time interval of the actuation of the solenoid 33 controlled by the signal generating device 5 can be set as desired, for example, in the specific example mentioned below, according to the time at which the oscillating bar 61 of the counting device 6 falls back to the upper nozzle.

Meanwhile, as shown in fig. 2, the counting device 6 may include a bracket 62 fixed on the test platform, a swing link 61 rotatably connected to the bracket 62 in a vertical direction, and a ventilation pipeline 63 extending vertically and having two open ends, a lower end of the ventilation pipeline 63 is communicated with the first air chamber 111 or the second air chamber 112, one end of the swing link 61 covers an upper nozzle of the ventilation pipeline 63, and the test platform further includes a second sensor 67 disposed near the upper nozzle for counting when the swing link 61 is separated from the upper nozzle. The pressurized gas module 42 fills pressurized gas into the third air chamber 113 and the control gas, taking the lower end of the ventilation pipeline 63 communicated with the first air chamber 111 as an example, when the electromagnetic coil 33 is in an open state, the swing rod 61 is blown away from the upper nozzle, the second sensor 67 counts once, when the electromagnetic coil 33 is in a closed state, the first air chamber 111 is not communicated with the third air chamber 113, the pressurized gas cannot be led to the ventilation pipeline 63, and at this time, the swing rod 61 falls back to the upper nozzle and waits for the electromagnetic coil 33 to be turned on again.

The bottom of the other end of the swing link 61 can be further provided with a buffer block 66, an upper sealing sheet 64 is arranged at the position, contacting with the pipe orifice of the ventilation pipeline 63, of the swing link 61, and a lower sealing sheet 65 is arranged at the edge of the pipe orifice of the ventilation pipeline 63 in a surrounding mode. The buffer block 66, the upper sealing sheet 64 and the lower sealing sheet 65 can be made of rubber or any other suitable material capable of playing a buffering role, and the buffer block 66, the upper sealing sheet 64 and the lower sealing sheet 65 can reduce noise generated when the swing rod 61 collides with the base 4 or the upper pipe opening, so that the buffer function is played. Meanwhile, the upper sealing sheet 64 and the lower sealing sheet 65 are matched to realize a good sealing effect between the swing rod 61 and the ventilation pipeline 63, if the sealing effect between the swing rod 61 and the ventilation pipeline 63 is not good, when air leakage is small, the swing rod 61 cannot be blown away from an upper pipe opening, the second sensor 67 cannot count, and therefore the sensitivity judgment of the electromagnetic valve 1 is caused to have an error.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (11)

1. A failure judgment method for an electromagnetic valve is characterized in that the electromagnetic valve comprises a valve body with a first valve core and a pilot valve for controlling the movement of the first valve core, the valve body comprises a first air chamber, a second air chamber and a third air chamber, the first valve core is arranged in the valve body in a translation mode to enable the first air chamber and the second air chamber to be communicated with the third air chamber alternatively,

the valve body is provided with a first groove and a second groove which are used for accommodating two end parts of the first valve core respectively, a control air passage which connects the outside of the valve body to the pilot valve, a first air inlet channel which connects the first groove to the pilot valve, and a second air inlet channel which connects the second groove to the pilot valve;

the pilot valve is provided with a second valve core, an electromagnetic coil used for controlling the movement of the second valve core, a first exhaust passage and a second exhaust passage, wherein the first exhaust passage and the second exhaust passage respectively extend from the outer end face of the pilot valve to the second valve core and are used for exhausting redundant gas when the second valve core moves, and the second valve core is configured as follows: when the electromagnetic coil is opened, the control air passage is communicated with the first air inlet passage, and the second air inlet passage is communicated with the second air outlet passage; or the control air passage is communicated with the second air inlet passage when the electromagnetic coil is closed, and the first air inlet passage is communicated with the first exhaust passage,

the method comprises any one or more of the following steps:

opening the electromagnetic coil, filling gas into the control air passage, and judging whether the first air chamber, the third air chamber, the first exhaust passage and the second exhaust passage leak gas or not;

closing the electromagnetic coil, filling gas into the control air passage, and judging whether the second air chamber, the third air chamber, the first exhaust passage and the second exhaust passage leak gas or not;

opening the electromagnetic coil, filling gas into the control air passage and the third air chamber, and judging whether the second air chamber, the first exhaust passage and the second exhaust passage leak gas or not; and

and closing the electromagnetic coil, filling gas into the control air passage and the third air chamber, and judging whether the first air chamber, the first exhaust passage and the second exhaust passage leak gas or not.

2. The solenoid valve failure judgment method according to claim 1,

the step of charging gas into the control airway comprises: connecting the control gas channel with high-pressure gas;

the step of inflating gas into the control gas duct and the third gas chamber includes: connecting the control gas passage with high pressure gas and connecting the third gas chamber with low pressure gas.

3. The solenoid valve failure judgment method according to claim 1,

the step of opening the electromagnetic coil and filling gas into the control gas channel and the third gas chamber comprises the following steps: sealing the control air passage from the first air chamber;

the step of closing the electromagnetic coil and filling the control air passage and the third air chamber with air comprises the following steps: and sealing the control air passage and the second air chamber.

4. The method for determining a failure of an electromagnetic valve according to claim 1, wherein the step of determining whether there is an air leak comprises:

and leading the parts of the first air chamber, the second air chamber, the third air chamber, the first exhaust passage and the second exhaust passage, which need to be judged whether air leakage exists, into liquid through pipelines.

5. The solenoid valve malfunction determination method according to claim 1, wherein the pilot valve has a manual adjustment mode for manually adjusting the position of the second spool in a case where the solenoid coil is disengaged,

prior to controlling the opening and closing of the solenoid, the method further comprises: and opening the manual regulation mode, filling gas into the control air passage and regulating the position of the second valve core, and judging whether the pilot valve is blocked or not according to the flexible action of the first valve core.

6. A solenoid valve test platform for performing the method according to any one of claims 1 to 5, wherein the test platform comprises a base, and a power module, a pressure gas module and a plurality of sets of installation modules are arranged on the base, the installation modules are used for fixing and installing the solenoid valve, and the pressure gas module is connected with the installation modules and is used for filling pressure gas into the control air channel and/or the third air chamber.

7. The electromagnetic valve test platform according to claim 6, wherein each set of the mounting modules is provided with an openable air passage opening respectively communicated with the first air chamber, the second air chamber, the third air chamber and the control air passage.

8. The electromagnetic valve test platform according to claim 6, wherein a sensitivity detection module is further arranged on the base, the sensitivity detection module comprises a signal generation device and a plurality of groups of counting devices, the signal generation device is electrically connected with the electromagnetic coil to control the opening or closing of the electromagnetic coil, and the counting devices are used for counting the opening times of the electromagnetic coil.

9. The solenoid valve test platform of claim 8, wherein the signal generating device comprises a rotating platform, a detection piece arranged at the edge of the rotating platform, and a first sensor arranged at intervals on the rotating platform and radially outside the rotating platform, wherein the first sensor generates a signal and counts every time the detection piece passes by the first sensor.

10. The electromagnetic valve test platform according to claim 8, wherein the counting device comprises a bracket fixed on the test platform, a swing rod rotatably connected to the bracket in a vertical direction, and a vertically extending ventilation pipeline with two open ends, the lower end of the ventilation pipeline is communicated with the first air chamber or the second air chamber, one end of the swing rod covers an upper pipe orifice of the ventilation pipeline, and the test platform further comprises a second sensor arranged close to the upper pipe orifice and used for counting when the swing rod is separated from the upper pipe orifice.

11. The electromagnetic valve test platform according to claim 10, wherein a buffer block is further arranged at the bottom of the other end of the swing rod, an upper sealing sheet is arranged at a position on the swing rod, which is in contact with a pipe orifice of the ventilation pipeline, and a lower sealing sheet is arranged around the edge of the pipe orifice of the ventilation pipeline.

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