A solenoid valve oscillation strike grinding method, control circuit and device

Abstract

The application provides an electromagnetic valve oscillation strike running-in method, a control circuit and a device, and relates to the field of electromagnetic reversing valves. The electromagnetic valve comprises a coil, a sealing end and a sealing surface. The sealing surface is controlled by the coil to be in contact with the sealing end to form a seal. The oscillation strike running-in method of the electromagnetic valve comprises the following steps: when the electromagnetic valve is assembled, the on-off frequency of the coil of the electromagnetic valve is controlled to further control the contact frequency of the sealing end and the sealing surface, so that the sealing end and the sealing surface are in contact multiple times. Under the combined action of the electromagnetic force generated by the coil and the elastic force generated by the spring, the sealing end and the sealing surface are in contact multiple times to form high-frequency contact, a similar "strike" effect is generated, and the long-time running-in of the electromagnetic valve is simulated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic valves, in particular to an electromagnetic valve oscillation strike grinding method, control circuit and device. BACKGROUND

[0002] The electromagnetic reversing valve refers to a reversing valve using air as power and an electromagnet as driving power. It has the advantages of small size, light weight, flexible operation, high reliability, etc., and is widely used in industrial automation, machine tools, metallurgy, chemical industry and other fields.

[0003] The electromagnetic reversing valve needs to be tested for sealing performance after assembly. The force for moving the plunger comes from the spring force and the electromagnetic force, but the spring force and the electromagnetic force are relatively small, and it is difficult to form an effective deformation "compression" force on the sealing surface after initial assembly. The sealing surface cannot be tightly attached to the air outlet channel, resulting in poor sealing performance of the electromagnetic reversing valve. SUMMARY

[0004] In order to solve the above problems, the present application provides an electromagnetic valve oscillation strike grinding method, control circuit and device. By controlling the on-off frequency of the coil, the problem of poor sealing performance of the electromagnetic reversing valve caused by the difficulty of forming an effective deformation "compression" force on the sealing surface after initial assembly and the inability of the sealing surface to be tightly attached to the sealing end can be solved.

[0005] The present application is implemented as follows:

[0006] In a first aspect, the present application provides an electromagnetic reversing valve oscillation strike grinding method applied to an electromagnetic valve. The electromagnetic valve includes a coil, a sealing end and a sealing surface. The sealing surface can be controlled by the coil to contact the sealing end to form a seal. The electromagnetic valve oscillation strike grinding method includes the following steps: when assembling the electromagnetic valve, the on-off frequency of the coil of the electromagnetic valve is controlled to control the contact frequency of the sealing end and the sealing surface, so that the sealing end and the sealing surface are contacted multiple times.

[0007] In a second aspect, the present application provides an oscillation strike grinding control circuit for an electromagnetic valve. The control circuit includes at least a square wave generating unit. The output end of the square wave generating unit is connected to the coil of the controlled electromagnetic valve. The square wave generating unit is used to generate a square wave signal of a preset frequency. The on-off frequency of the coil of the controlled electromagnetic valve is controlled by the square wave signal of the preset frequency.

[0008] Based on the second aspect, further comprising an interaction switching unit, the interaction switching unit comprising at least two output terminals; the output terminal of the square wave generating unit is connected with the input terminal of the interaction switching unit; the interaction switching unit is used for switching on the output terminal of the square wave generating unit and the corresponding output terminal of the interaction switching unit; the output terminal of the square wave generating unit is used for being connected with the coil of the controlled electromagnetic valve, in particular, the output terminal of the interaction switching unit is used for being connected with the coil of the controlled electromagnetic valve.

[0009] Based on the second aspect, further, the square wave generating unit comprises: a time relay U1, a time relay U2, a digital counter U3, a switching power supply U4 and a fuse; the common terminal pin 1 of the time relay U1 is connected with the power supply pin 2 of the time relay U2, the power supply pin 2 of the time relay U1 is connected with the pin V+ of the switching power supply U4 through the key switch W2-1, the normally closed contact pin 4 of the time relay U1 is connected with the normally closed contact pin 4 of the time relay U2, the power supply pin 7 of the time relay U1 is connected with the common terminal pin 8 of the time relay U2, the common terminal of the power supply pin 7 of the time relay U1 and the common terminal pin 8 of the time relay U2 is connected with the relay normally closed contact pin 3 of the digital counter U3, the common terminal pin 1 of the time relay U2 is connected with one end of the key switch W4-2, the common terminal pin 1 of the time relay U2 is connected with the relay common terminal pin 4 of the digital counter U3 through the capacitor C2, the common terminal pin 1 of the time relay U2 is connected with the CNT pin 7 of the digital counter U3, the normally closed contact pin 5 of the time relay U2 is connected with the power supply pin 7 of the time relay U2, the positive pin 1 of the power supply terminal of the digital counter U3 is connected with the zero line, the negative pin 2 of the power supply terminal of the digital counter U3 is connected with the live wire through the key switch W1 and the fuse, the negative pin 2 of the power supply terminal of the digital counter U3 is connected with the pin Vin of the switching power supply U4, the relay common terminal pin 4 of the digital counter U3 is grounded, the relay common terminal pin 4 of the digital counter U3 is connected with the COM pin 9 of the digital counter U3, the common terminal of the relay common terminal pin 4 of the digital counter U3 and the COM pin 9 of the digital counter U3 is connected with the pin V- of the switching power supply U4, the pin GND of the switching power supply U4 is connected with the zero line, the pin V- of the switching power supply U4 is connected with the pin V+ of the switching power supply U4 through the electrolytic capacitor C1, the pin V- of the switching power supply U4 is grounded;

[0010] The interactive switching unit comprises one end of LED lamp W1L connected with pin V+ of switching power supply U4, the other end of LED lamp W1L grounded, LED lamp W3L connected with button switch W3-1 in series and then connected with LED lamp W1L in parallel, LED lamp W4L connected with button W4-1 in series and then connected with LED lamp W1L in parallel, the other end of button switch W4-2 connected with the anode of diode D1, the cathode of diode D1 connected with one end of coil U, the other end of coil U grounded, the anode of diode D2 connected with the anode of diode D1, the cathode of diode D2 connected with one end of coil D, the other end of coil D grounded, the anode of diode D3 connected with the anode of diode D1, the cathode of diode D3 connected with one end of coil L, the other end of coil L grounded, the anode of diode D4 connected with the anode of diode D1, the cathode of diode D4 connected with one end of coil R, the other end of coil R grounded, one end of coil J grounded, button switch W3-2 connected with wave band switch W5 in series, the common end of button switch W3-2 and wave band switch W5 connected with the common end pin 1 of time relay U2 and the common end of button switch W4-2, the other end of button switch W3-2 connected with pin V+ of switching power supply U4, LED lamp W2L connected with button switch W2-2 in series, the other end of LED lamp W2L connected with pin V+ of switching power supply U4, the other end of button switch W2-2 grounded.

[0011] In a third aspect, the application provides an oscillation and strike grinding device of a solenoid valve, comprising a solenoid valve, wherein the solenoid valve comprises a coil, a sealing end and a sealing surface, the sealing surface is controlled by the coil and can be in contact with the sealing end to form a seal, and the device further comprises the control circuit, wherein the output end of the square wave generating unit of the control circuit is connected with the coil of the controlled solenoid valve.

[0012] Based on the third aspect, further, the solenoid valve is a solenoid reversing valve.

[0013] Based on the third aspect, further, the solenoid reversing valve comprises a valve body, wherein the valve body is provided with a first gas outlet channel, a second gas outlet channel and a gas inlet channel which are in communication with a chamber, a plunger is movably arranged in the chamber, a spring is arranged outside the plunger, one end of the spring is connected with the valve body, and the other end of the spring is connected with one end of the plunger and applies pressure to the plunger to seal the first gas outlet channel, a first soft plug is arranged at the first end of the plunger, and the first end surface of the plunger and the end surface of the first soft plug form a first sealing surface for sealing a first sealing end of the first gas outlet channel, a second soft plug is arranged at the second end of the plunger, and the second end surface of the plunger and the end surface of the second soft plug form a second sealing surface for sealing a second sealing end of the second gas outlet channel, and a coil corresponding to the second end of the plunger is arranged on the valve body in a position corresponding to the second end of the plunger, and the coil is used to generate a magnetic force to attract the plunger to move towards the second gas outlet channel to seal the second sealing end of the second gas outlet channel after being electrified.

[0014] Further based on the third aspect, the plunger is provided with cavities at both ends, and the first soft plug and the second soft plug are arranged in the cavities at both ends of the plunger respectively.

[0015] Further based on the third aspect, the air inlet channel is arranged annularly along the side surface of the valve body.

[0016] Further based on the third aspect, the central axes of the first air outlet channel and the second air outlet channel coincide with the central axis of the valve body.

[0017] Compared with the prior art, the present application has at least the following advantages or beneficial effects:

[0018] The period and number of times of turning on and off the coil in the control electromagnetic reversing valve are controlled, and under the action of the electromagnetic force generated by the coil, the sealing end and the sealing surface form high-frequency contact, and a "striking" effect is generated, so that the sealing end and the sealing surface are fully contacted, the sealing surface forms a ring-shaped pre-contact indentation, the sealing property is greatly improved, and the sealing end and the sealing surface can be well fitted, and the success rate of one-time assembly is close to 100%. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a schematic diagram of the present application for the sealing surface and the sealing end to be closely fitted under the action of the coil in the oscillation striking running-in method of the electromagnetic reversing valve;

[0021] Figure 2 It is a schematic diagram of the coil control by the square wave generating unit of the oscillation striking running-in control circuit of the electromagnetic valve of the present application;

[0022] Figure 3 It is a schematic diagram of the input and output connection relationship of the interactive switching unit of the oscillation striking running-in control circuit of the electromagnetic valve of the present application;

[0023] Figure 4 It is a circuit diagram of the control circuit of the oscillation striking running-in method of the electromagnetic reversing valve of the present application;

[0024] Figure 5 It is a sectional view of the electromagnetic reversing valve of the oscillation striking running-in method of the present application;

[0025] Figure 6Figure 1 is a schematic diagram of gas flow when the coil is de-energized in the oscillation and beating run-in method of the electromagnetic directional valve according to the present application;

[0026] Figure 7 Figure 2 is a schematic diagram of gas flow when the coil is energized in the oscillation and beating run-in method of the electromagnetic directional valve according to the present application;

[0027] Figure 8 Figure 3 is a sectional view of the plunger of the electromagnetic directional valve in the oscillation and beating run-in method of the electromagnetic directional valve according to the present application.

[0028] Figure 1 is a schematic diagram of gas flow when the coil is de-energized in the oscillation and beating run-in method of the electromagnetic directional valve according to the present application; DETAILED DESCRIPTION

[0029] So that the objects, technical solutions and advantages of the embodiments of the present application are more apparent, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0031] EMBODIMENTS

[0032] Some embodiments of the present application will be described in detail below with reference to the drawings. Each of the following embodiments and each feature in the embodiments can be combined with each other without conflict.

[0033] The embodiments of the present application provide an oscillation and beating run-in method of an electromagnetic directional valve, which is applied to an electromagnetic valve. The electromagnetic valve includes a coil 10, a sealing end and a sealing surface. The sealing surface is controlled by the coil 10 to be in contact with the sealing end to form a seal. The oscillation and beating run-in method of the electromagnetic valve includes the following steps: when assembling the electromagnetic valve, the on-off frequency of the coil 10 of the electromagnetic valve is controlled to further control the contact frequency of the sealing end and the sealing surface, so that the sealing end and the sealing surface are in contact multiple times.

[0034] In the above embodiments, please refer to Figure 1, the electromagnetic valve can be an electromagnetic reversing valve, and the contact state of the first sealing end and the first sealing surface 11 of the first gas outlet channel 3 and the contact state of the first sealing end and the second sealing surface 12 of the second gas outlet channel 4 are controlled by controlling the on-off state of the coil 10. When the coil 10 is not powered, the spring 7 applies a spring force to the plunger 6 towards the first gas outlet channel 3, the plunger 6 moves towards the first gas outlet channel 3, the first sealing end and the first sealing surface 11 of the first gas outlet channel 3 are tightly attached to form a sealing state, and the first sealing end and the second sealing surface 12 of the second gas outlet channel 4 are separated. When the coil 10 is powered, the coil 10 applies a suction force to the plunger 6 towards the second gas outlet channel 4, which is greater than the spring force applied by the spring 7 to the plunger 6 towards the first gas outlet channel 3, the plunger 6 moves towards the second gas outlet channel 4, the first sealing end and the second sealing surface 12 of the second gas outlet channel 4 are tightly attached to form a sealing state, and the first sealing end and the first sealing surface 11 of the first gas outlet channel 3 are separated. The on-off frequency of the coil 10 of the control electromagnetic valve is controlled to control the contact frequency of the sealing end and the sealing surface, so that the sealing end and the sealing surface are contacted multiple times.

[0035] The embodiment of the present application provides an oscillation and beating grinding control circuit of an electromagnetic valve, the control circuit at least comprises a square wave generating unit, an output end of the square wave generating unit is used for being connected with a coil 10 of the controlled electromagnetic valve; the square wave generating unit is used for generating a square wave signal with a preset frequency, and the on-off frequency of the coil 10 of the controlled electromagnetic valve is controlled by the square wave signal with the preset frequency.

[0036] In the above embodiment, please refer to Figure 2 The on-off frequency of the coil 10 is controlled by the square wave signal with the preset frequency, the coil 10 is powered on when the output high level of the square wave generating unit, the coil 10 is powered off when the output low level of the square wave generating unit, and the on-off frequency of the coil 10 is consistent with the high-low level frequency of the output of the square wave generating unit.

[0037] In some embodiments of the present application, an interactive switching unit is further included, the interactive switching unit comprises at least two output ends; the output end of the square wave generating unit is connected with the input end of the interactive switching unit; the interactive switching unit is used for switching the output end of the square wave generating unit to the corresponding output end of the interactive switching unit; and the output end of the square wave generating unit is used for being connected with the coil 10 of the controlled electromagnetic valve, specifically, the output end of the interactive switching unit is used for being connected with the coil 10 of the controlled electromagnetic valve.

[0038] In the above embodiment, please refer to Figure 3 The electromagnetic valve has three modes of single-channel mode, full selection mode and assembly mode, which are realized by the interactive switching unit.

[0039] Single-channel mode: the coils 10 of the five electromagnetic valves are connected with one of them as needed.

[0040] All selection mode: four coils 10 can be connected at the same time.

[0041] Assembly mode: one of the coils 10 of the five solenoid valves is connected separately, and no striking work is performed, and the five solenoid valves can be assembled separately.

[0042] In some embodiments of the present invention, the above-mentioned square wave generating unit includes: the above-mentioned square wave generating unit includes: the above-mentioned square wave generating unit includes: a time relay U1, a time relay U2, a digital counter U3, a switching power supply U4 and a fuse; the common end pin 1 of the above-mentioned time relay U1 is connected to the power pin 2 of the time relay U2, the power pin 2 of the time relay U1 is connected to the pin V+ of the switching power supply U4 through the key switch W2-1, the normally closed contact pin 4 of the time relay U1 is connected to the normally closed contact pin 4 of the time relay U2, the power pin 7 of the time relay U1 is connected to the common end pin 8 of the time relay U2, the common end of the power pin 7 of the time relay U1 and the common end pin 8 of the time relay U2 is connected to the relay normally closed contact pin 3 of the digital counter U3, the common end pin 1 of the time relay U2 is connected to one end of the key switch W4-2, and the common end pin 1 of the time relay U2 is connected to the relay common end pin 4 of the digital counter U3 through the capacitor C2. , the common terminal pin 1 of the time relay U2 is connected to the CNT pin 7 of the digital counter U3, the normally closed contact pin 5 of the time relay U2 is connected to the power pin 7 of the time relay U2, the positive power supply pin 1 of the digital counter U3 is connected to the neutral line, the negative power supply pin 2 of the digital counter U3 is connected to the live wire through the key switch W1 and the fuse, the negative power supply pin 2 of the digital counter U3 is connected to the pin Vin of the switching power supply U4, the relay common terminal pin 4 of the digital counter U3 is grounded, the relay common terminal pin 4 of the digital counter U3 is connected to the COM pin 9 of the digital counter U3, the common end of the relay common terminal pin 4 of the digital counter U3 and the COM pin 9 of the digital counter U3 is connected to the pin V- of the switching power supply U4, the pin GND of the switching power supply U4 is connected to the neutral line, the pin V- of the switching power supply U4 is connected to the pin V+ of the switching power supply U4 through the electrolytic capacitor C1, and the pin V- of the switching power supply U4 is grounded;

[0043] The above-mentioned interaction switching unit includes: one end of LED lamp W1L is connected with pin V+ of switching power supply U4, the other end of LED lamp W1L is grounded, LED lamp W3L is connected with button switch W3-1 in series and is connected with LED lamp W1L in parallel, LED lamp W4L is connected with button W4-1 in series and is connected with LED lamp W1L in parallel, the other end of button switch W4-2 is connected with the anode of diode D1, the cathode of diode D1 is connected with one end of coil U, the other end of coil U is grounded, the anode of diode D2 is connected with the anode of diode D1, the cathode of diode D2 is connected with one end of coil D, the other end of coil D is grounded, the anode of diode D3 is connected with the anode of diode D1, the cathode of diode D3 is connected with one end of coil L, the other end of coil L is grounded, the anode of diode D4 is connected with the anode of diode D1, the cathode of diode D4 is connected with one end of coil R, the other end of coil R is grounded, one end of coil J is grounded, button switch W3-2 is connected with wave band switch W5 in series, the common end of button switch W3-2 and wave band switch W5 is connected with the common end pin 1 of time relay U2 and button switch W4-2, the other end of button switch W3-2 is connected with pin V+ of switching power supply U4, LED lamp W2L is connected with button switch W2-2 in series, the other end of LED lamp W2L is connected with pin V+ of switching power supply U4, the other end of button switch W2-2 is grounded.

[0044] In the above-mentioned embodiment, please refer to Figure 4 , single-channel mode: w2-1 switch is on, square wave generating unit outputs high level, wave band switch w5 is dialled, at this time, the coils 10 of the five electromagnetic directional control valves U, D, L, R and J are connected with one of them according to the need, under the control of the square wave generating unit, the first sealing surface and the second sealing surface respectively work at a certain frequency and time with the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4.

[0045] full selection mode: when w2-1 and w4-2 are pressed, the square wave generating unit and the four diodes D1, D2, D3 and D4 are connected, the connection of U, D, L and R can be completed at the same time, that is, the coils 10 of U, D, L and R are turned on and off at a certain frequency and time under the control of the square wave generating unit, the first sealing surface and the second sealing surface of the electromagnetic directional control valves corresponding to U, D, L and R respectively work at a certain frequency and time with the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4.

[0046] assembly mode: when w3-2 is pressed, the square wave generating unit is disconnected and does not work, U, D, L, R and J can be connected according to the need, that is, one of the coils 10 of the five electromagnetic directional control valves is connected alone, and no beating work is performed, so that the five electromagnetic directional control valves can be assembled respectively.

[0047] Exemplarily, the switching power supply adopts Schneider ABL2REM24150K, which is a 24V / 150W switching power supply, the input voltage range is 8V-36V, the output voltage is stable, the efficiency is high, the volume is small, the weight is light, and it is suitable for industrial, medical, communication and other fields. The digital counter adopts ZM48, and the time relay adopts ST3P.

[0048] In some embodiments of the application, a indicating unit is further included for indicating the working state of the control circuit.

[0049] The LED lamp W1L indicates whether the power supply of the control circuit is turned on, the LED lamp W2L indicates whether the controller conversion is started, the LED lamp W3L indicates whether the assembly mode is started, and the LED lamp W4L indicates whether the full selection mode is started.

[0050] The embodiment of the application provides a kind of electromagnetic valve's oscillation strike grinding device, including electromagnetic valve, the electromagnetic valve includes coil 10, sealing end and sealing surface, the sealing surface is controlled by coil 10, can be contacted with sealing end to form seal, further including the control circuit of above-mentioned, the output end of square wave generating unit of above-mentioned control circuit is connected with the coil 10 of controlled electromagnetic valve.

[0051] In the above embodiment, please refer to Figure 5 Sealing end includes first sealing end and second sealing end, and sealing surface includes first sealing surface 11 and second sealing surface 12. The contact state of sealing end and sealing surface is controlled by controlling the movement of coil 10. When coil 10 is not powered, first sealing surface 11 and first sealing end tightly adhere to form a sealed state, and second sealing surface 12 and second sealing end are separated. When coil 10 is powered, second sealing surface 12 and second sealing end tightly adhere to form a sealed state, and first sealing surface 11 and first sealing are separated. The on-off frequency of coil 10 of control electromagnetic valve is controlled to control the contact frequency of sealing end and sealing surface, so that sealing end and sealing surface are contacted multiple times.

[0052] Please refer to Figure 6 And Figure 7In some embodiments of the present application, the electromagnetic reversing valve comprises a valve body 1, a first gas outlet channel 3, a second gas outlet channel 4 and a gas inlet channel 5 are arranged on the valve body 1 and communicate with a chamber 2, a plunger 6 is movably arranged in the chamber 2, a spring 7 is arranged outside the plunger 6, one end of the spring 7 is connected with the valve body 1, and the other end of the spring 7 is connected with one end of the plunger 6 and applies pressure to the plunger 6 to seal the first gas outlet channel 3, a first soft plug 8 is arranged at a first end of the plunger 6, and a first end surface of the plunger 6 and an end surface of the first soft plug 8 form a first sealing surface 11 for sealing a first sealing end of the first gas outlet channel 3, a second soft plug 9 is arranged at a second end of the plunger 6, and a second end surface of the plunger 6 and an end surface of the second soft plug 9 form a second sealing surface 12 for sealing a second sealing end of the second gas outlet channel 4, and a coil 10 corresponding to the second end of the plunger 6 is arranged on the valve body 1 and cooperates with the plunger 6, and the coil 10 generates a magnetic force to attract the plunger 6 to move towards the second gas outlet channel 4 to seal the second sealing end of the second gas outlet channel 4 when the coil 10 is energized.

[0053] In the above embodiment, when the coil 10 is not energized, the spring 7 is in a compressed state to apply pressure to the plunger 6, and since the plunger 6 is movably arranged in the chamber 2, the plunger 6 moves towards the first gas outlet channel 3 under the force to seal the first sealing end of the first gas outlet channel 3. At this time, the second gas outlet channel 4 is in an open state, and the gas enters the chamber 2 from the gas inlet channel 5, passes through the gap between the plunger 6 and the chamber 2, and then exits from the second gas outlet channel 4. The plunger 6 is made of metal, such as steel, and can be attracted by a magnetic force. When the coil 10 is energized, the magnetic attraction force generated by the coil 10 is greater than the pressure of the spring 7 on the plunger 6, the plunger 6 moves towards the second gas outlet channel 4 and is in close contact with the second sealing end of the second gas outlet channel 4, and the second sealing surface 12 seals the second sealing end of the second gas outlet channel 4. At this time, the first gas outlet channel 3 is in an open state. By controlling the on-off of the coil 10 in the electromagnetic reversing valve, under the combined action of the electromagnetic force generated by the coil 10 and the elastic force generated by the spring 7, the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4 respectively form high-frequency contact with the first sealing surface 11 and the second sealing surface 12, which produces a "punching" effect, simulates the long-term running-in of the electromagnetic reversing valve, and under the action of the plunger 6, the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4 are in full contact with the end surface of the first soft plug 8 and the end surface of the second soft plug 9, forming a ring-shaped pre-contact indentation, greatly improving the sealing performance, and the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4 can be well fitted with the first sealing surface 11 and the second sealing surface 12, and the first-time assembly success rate is close to 100%.

[0054] Please refer to Figure 8 In some embodiments of the present application, cavities are arranged at both ends of the plunger 6, and the first soft plug 8 and the second soft plug 9 are arranged in the cavities at both ends of the plunger 6, respectively.

[0055] In the above embodiment, the plunger 6 is made of steel material, the soft plug is made of plastic material, the two end faces of the plunger 6 cannot be completely tightly fitted with the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4, so it is necessary to grind the two end faces of the plunger 6 with the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4 respectively. Steel needs a large force to produce complete deformation, so it is not convenient to grind. Plastic only needs a small force to produce complete deformation. The first soft plug 8 and the second soft plug 9 are arranged in the cavities at the two ends of the plunger 6, and the end face of the first soft plug 8 and the end face of the second soft plug 9 are ground with the first sealing end of the first gas outlet channel 3 and the second sealing end of the second gas outlet channel 4 respectively. After grinding, the end face of the first soft plug 8 can be tightly fitted with the first sealing end of the first gas outlet channel 3, and the end face of the second soft plug 9 can be tightly fitted with the second sealing end of the second gas outlet channel 4, thereby improving the sealing performance of the electromagnetic directional valve. The hardness of the steel material can prevent the soft plug from deforming, and the softness of the plastic material can ensure the tight fit between the sealing surfaces.

[0056] In some embodiments of the present application, the above-mentioned gas inlet channel 5 is arranged in a ring shape along the side of the valve body 1.

[0057] In the above embodiment, the ring-shaped arrangement of the gas inlet channel 5 can make the gas flow more uniform in the valve body, avoiding the accumulation of gas flow in a certain area, thereby improving the utilization rate of gas flow

[0058] In summary, the embodiments of the present application provide a method for grinding and striking of an electromagnetic directional valve:

[0059] The electromagnetic valve can be an electromagnetic directional valve, and the contact state of the first sealing end of the first gas outlet channel 3 and the first sealing surface 11 and the contact state of the first sealing end of the second gas outlet channel 4 and the second sealing surface 12 are controlled by controlling the on-off state of the coil 10. When the coil 10 is not powered, the spring 7 applies a force to the plunger 6 towards the first gas outlet channel 3, the plunger 6 moves towards the first gas outlet channel 3, the first sealing end of the first gas outlet channel 3 and the first sealing surface 11 are tightly fitted to form a sealing state, and the first sealing end of the second gas outlet channel 4 and the second sealing surface 12 are separated. When the coil 10 is powered, the coil 10 applies a suction force to the plunger 6 towards the second gas outlet channel 4, which is greater than the force applied by the spring 7 to the plunger 6 towards the first gas outlet channel 3, the plunger 6 moves towards the second gas outlet channel 4, the first sealing end of the second gas outlet channel 4 and the second sealing surface 12 are tightly fitted to form a sealing state, and the first sealing end of the first gas outlet channel 3 and the first sealing surface 11 are separated. The on-off frequency of the coil 10 of the electromagnetic valve is controlled to control the contact frequency of the sealing end and the sealing surface, so that the sealing end and the sealing surface are contacted multiple times.

[0060] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An oscillation, striking and running-in control circuit for a solenoid valve, characterized in that: The control circuit comprises at least a square wave generating unit, wherein the output end of the square wave generating unit is used to be connected to the coil (10) of the controlled electromagnetic valve; The square wave generating unit is used to generate a square wave signal of a preset frequency, and to control the on-off frequency of the coil (10) of the controlled electromagnetic valve with the square wave signal of the preset frequency; It also includes an interactive switching unit, wherein the interactive switching unit includes at least two output terminals; The output end of the square wave generating unit is connected to the input end of the interactive switching unit; The interactive switching unit is used to switch the output end of the square wave generating unit and the output end corresponding to the interactive switching unit; The output end of the square wave generating unit is used to connect to the coil (10) of the controlled electromagnetic valve. Specifically, the output end of the interactive switching unit is used to connect to the coil (10) of the controlled electromagnetic valve; The square wave generating unit includes: a time relay U1, a time relay U2, a digital counter U3, a switching power supply U4 and a fuse; The common terminal pin 1 of the time relay U1 is connected to the power supply pin 2 of the time relay U2, the power supply pin 2 of the time relay U1 is connected to the pin V+ of the switching power supply U4 through the key switch W2-1, the normally closed contact pin 4 of the time relay U1 is connected to the normally closed contact pin 4 of the time relay U2, the power supply pin 7 of the time relay U1 is connected to the common terminal pin 8 of the time relay U2, the common end of the power supply pin 7 of the time relay U1 and the common terminal pin 8 of the time relay U2 is connected to the relay normally closed contact pin 3 of the digital counter U3, the common terminal pin 1 of the time relay U2 is connected to one end of the key switch W4-2, the common terminal pin 1 of the time relay U2 is connected to the relay common terminal pin 4 of the digital counter U3 through the capacitor C2, the common terminal pin 1 of the time relay U2 is connected to the CNT pin 7 of the digital counter U3, and the time The normally closed contact pin 5 of the relay U2 is connected to the power pin 7 of the time relay U2, the positive power pin 1 of the digital counter U3 is connected to the neutral line, the negative power pin 2 of the digital counter U3 is connected to the live wire through the key switch W1 and the fuse, the negative power pin 2 of the digital counter U3 is connected to the pin Vin of the switching power supply U4, the relay common pin 4 of the digital counter U3 is grounded, the relay common pin 4 of the digital counter U3 is connected to the COM pin 9 of the digital counter U3, the common end of the relay common pin 4 of the digital counter U3 and the COM pin 9 of the digital counter U3 is connected to the pin V- of the switching power supply U4, the pin GND of the switching power supply U4 is connected to the neutral line, the pin V- of the switching power supply U4 is connected to the pin V+ of the switching power supply U4 through the electrolytic capacitor C1, and the pin V- of the switching power supply U4 is grounded; The interactive switching unit includes: One end of the LED lamp W1L is connected to the pin V+ of the switching power supply U4, and the other end of the LED lamp W1L is grounded. The LED lamp W3L is connected in series with the push switch W3-1 and then connected in parallel with the LED lamp W1L. The LED lamp W4L is connected in series with the push button W4-1 and then connected in parallel with the LED lamp W1L. The other end of the push button switch W4-2 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to one end of the coil U, and the other end of the coil U is grounded. The anode of the diode D2 is connected to the anode of the diode D1, the cathode of the diode D2 is connected to one end of the coil D, and the other end of the coil D is grounded. The anode of the diode D3 is connected to the anode of the diode D1, and the cathode of the diode D3 is connected to the coil One end of coil L is connected, the other end of coil L is grounded, the anode of diode D4 is connected to the anode of diode D1, the cathode of diode D4 is connected to one end of coil R, the other end of coil R is grounded, one end of coil J is grounded, the push switch W3-2 is connected in series with the band switch W5, the common end of the push switch W3-2 and the band switch W5 is connected to the common end pin 1 of the time relay U2 and the common end of the push switch W4-2, the other end of the push switch W3-2 is connected to the pin V+ of the switching power supply U4, the LED lamp W2L is connected in series with the push switch W2-2, the other end of the LED lamp W2L is connected to the pin V+ of the switching power supply U4, and the other end of the push switch W2-2 is grounded.

2. A method for oscillating and striking a solenoid valve, applied to the control circuit according to claim 1, wherein the solenoid valve comprises a coil (10), a sealing end and a sealing surface, wherein the sealing surface is controlled by the coil (10) to contact the sealing end to form a seal, and wherein: The oscillation impact running-in method of the solenoid valve comprises the following steps: When assembling the solenoid valve, the on-off frequency of the coil (10) of the solenoid valve is controlled to thereby control the contact frequency between the sealing end and the sealing surface, so that the sealing end and the sealing surface contact multiple times.

3. An oscillating impact grinding device for a solenoid valve, comprising a solenoid valve, the solenoid valve comprising a coil (10), a sealing end and a sealing surface, the sealing surface being controlled by the coil (10) and capable of contacting the sealing end to form a seal, characterized in that: It also includes the control circuit according to claim 1, wherein the output end of the square wave generating unit of the control circuit is connected to the coil (10) of the controlled electromagnetic valve.

4. The oscillation beating grinding device for a solenoid valve according to claim 3, characterized in that: The solenoid valve is a solenoid reversing valve.

5. The oscillation and beating grinding device for a solenoid valve according to claim 4, characterized in that: The electromagnetic reversing valve comprises a valve body (1), wherein the valve body (1) is provided with a first air outlet channel (3), a second air outlet channel (4) and an air inlet channel (5) which are communicated with a chamber (2), a plunger (6) is movably provided in the chamber (2), a spring (7) is sleeved on the outer side of the plunger (6), one end of the spring (7) is connected to the valve body (1), and the other end is connected to one end of the plunger (6) and applies pressure to the plunger (6) to seal the first air outlet channel (3), a first soft plug (8) is provided at the first end of the plunger (6), and a first end surface of the plunger (6) and the first soft plug ( The end surface of the plunger (8) forms a first sealing surface for sealing the first sealing end of the first air outlet channel (3), the second end of the plunger (6) is provided with a second soft plug (9), the second end surface of the plunger (6) and the end surface of the second soft plug (9) form a second sealing surface for sealing the second sealing end of the second air outlet channel (4), and a coil (10) matched with the plunger (6) is provided at a position corresponding to the second end of the plunger (6) on the valve body (1), and the coil (10) is used to generate a magnetic force to attract the plunger (6) to move toward the second air outlet channel (4) to seal the second sealing end of the second air outlet channel (4) after being energized.

6. The oscillation beating grinding device for a solenoid valve according to claim 5, characterized in that: Both ends of the plunger (6) are provided with cavities, and the first soft plug (8) and the second soft plug (9) are respectively arranged in the cavities at both ends of the plunger (6).

7. The oscillation beating grinding device for a solenoid valve according to claim 5, characterized in that: The air inlet channel (5) is arranged in a ring shape along the side of the valve body (1).

8. The oscillation beating grinding device for a solenoid valve according to claim 5, characterized in that: The central axis of the first air outlet channel (3) and the second air outlet channel (4) coincides with the central axis of the valve body (1).

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