CN213451993U - Pilot-operated type electromagnetic valve - Google Patents

Abstract

The utility model discloses a pilot-operated solenoid valve, including valve body, valve gap, two control unit and two case subassemblies, the inside of valve body is equipped with the case hole with oil return opening, oil inlet and oil circuit delivery outlet intercommunication respectively, the case subassembly is fixed in the case hole, control unit includes armature press switch, solenoid, integrated control circuit and stroke adjusting screw, armature press switch fixes on the valve body, the stroke adjusting screw sets up on the armature press switch, be equipped with manual button, cable joint and stroke control mouth on the valve gap. The utility model uses the integrated circuit control and the stroke adjusting screw, thereby improving the control accuracy and eliminating the potential safety hazard; the manual button can manually open or close the valve port of the electromagnetic valve under the condition of no power supply, so that the debugging and the detection before the electromagnetic valve is powered on are facilitated. The utility model discloses simple structure, easy maintenance, the practicality is high.

Description

Pilot-operated type electromagnetic valve

Technical Field

The utility model relates to a solenoid valve technical field, in particular to guide's formula solenoid valve.

Background

Solenoid valves are widely used in industrial control systems, mainly for controlling other parameters of pressure, flow and direction of flow of a medium. The electromagnetic valve realizes expected control through the on-off of a circuit and has the characteristics of high control precision, high flexibility and the like. In real life, the sealing performance, the functional requirements, the action performance, the flow capacity and the structural characteristics are the key points of the electromagnetic valve.

When the pilot-operated electromagnetic valve is electrified, the valve rod is lifted by means of electromagnetic force, the pilot valve port is opened, at the moment, the upper cavity of the electromagnetic valve is relieved by the pilot hole, low-high differential pressure is formed around the main valve core, and under the action of the differential pressure, fluid pressure pushes the main valve core to move upwards to open the main valve port. When the power is cut off, under the action of spring force and gravity of main valve core, the valve rod is reset, the pilot hole is closed, the main valve core is moved downwards, and the main valve port is closed.

The existing electromagnetic valve has the defects of complex structure, poor sealing performance, high cost, short service life, troublesome installation and maintenance, more hidden troubles of faults, incapability of smoothly discharging redundant substances, easy clamping stagnation and ice blockage and increase of the fault rate of the electromagnetic valve, and the safety and the reliability of the electromagnetic valve are very important, so the innovation and the improvement of the electromagnetic valve are very necessary. And the power cord and the signal line on the valve gap are not integrated, so that the installation is scattered, the centralized control is not facilitated, and the potential safety hazard is increased.

Disclosure of Invention

The utility model aims to provide a pilot-operated solenoid valve aiming at the defects of the prior art,

in order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a pilot-operated electromagnetic valve comprises a valve body, a valve cover, two control components and two valve core components, wherein the valve body and the valve cover are fixed through bolts, one side of the valve body is provided with an oil return port, an oil inlet and two oil path output ports, two valve core holes communicated with the oil return port, the oil inlet and the oil path output ports are formed in the valve body, the valve core components are arranged in the valve core holes, the control components comprise an armature pressing switch, an electromagnetic coil, an integrated control circuit and a stroke adjusting screw, the armature pressing switch is fixed on the upper portion of the valve body, the stroke adjusting screw is arranged on the armature pressing switch, the electromagnetic coil is arranged in the valve body, the integrated control circuit is arranged in the valve body in a sealing mode, a manual button, a cable connector and a stroke adjusting port are arranged on the valve cover, and a stepped hole is further formed in, the manual button is arranged in the stepped hole.

Further, the valve core assembly comprises a first valve sleeve, a first spring, a ball valve seat, a first ball valve, a first ejector rod, a second valve sleeve, a pilot ball valve, a third valve sleeve, a second spring and a second ejector rod, the first valve sleeve, the second valve sleeve, the third valve sleeve and the valve core hole are sequentially arranged in the valve core hole, the first valve sleeve, the second valve sleeve and the third valve sleeve are fixed with the valve core hole through threads, the second ejector rod is connected with the stroke adjusting screw and forms a lever mechanism with the armature pressing switch, and therefore opening and closing of the pilot ball valve are controlled.

Further, the manual button comprises a third spring, a copper sleeve, a gland, a rubber cap, a copper core and a fourth spring, the third spring, the copper sleeve, the gland and the rubber cap are arranged in a stepped hole in the valve cover, the gland is fastened on the valve cover in an interference mode, the copper core and the fourth spring are arranged in the copper sleeve, and the copper core is always connected with the armature pressing switch under the action of the fourth spring.

Further, the stroke adjusting opening is provided with a sealing rubber cover which is detachable.

Further, the cable connector is hermetically fastened on the valve cover and connected with the control integrated circuit.

Further, the cable connector is an aviation connector.

Further, the stroke adjusting screw is a 12.9-level stroke adjusting screw.

Furthermore, the number of the manual buttons on the valve cover is two, and the number of the stroke adjusting openings is two.

Furthermore, a flow guide channel is also arranged in the valve body.

The utility model has the advantages that: (1) the power line and the signal line of the control electromagnetic coil are changed into integrated circuit control, and the valve cover is connected with an external input power supply and a control signal by using an aviation connector, so that the control circuit is simplified, and the control accuracy is improved; (2) an armature pressing switch of the electromagnetic valve adopts the principle of a lever to realize that a pilot valve is opened by using smaller magnetic attraction; (3) the armature pressing switch is provided with a top rod in the 12.9-level stroke adjusting screw adjusting valve core assembly, the top rod is directly acted by pressure instead of the armature pressing switch, and the contact surface between the repeated opening and closing action loss and the top rod in the use process is avoided, so that the opening action of the electromagnetic valve is inaccurate; (3) the valve cover is provided with a manual button, so that the electromagnetic valve can be opened or closed manually under the condition of no power supply, and debugging and detection before the electromagnetic valve is powered on are facilitated; (4) two valve core holes and two electromagnetic coils are arranged in the valve body, and two main control valves can be controlled simultaneously. The utility model discloses simple structure, easy maintenance, the practicality is high.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a valve element assembly according to the present invention;

FIG. 3 is a schematic structural view of a manual button in the structure of the present invention;

FIG. 4 is a schematic view of the overall structure of the present invention;

reference numerals: 1-valve body, 2-valve cover, 3-valve core component, 11-oil return port, 12-oil inlet, 13-oil path output port, 14-valve core hole, 21-manual button, 22-cable connector, 23-stroke adjusting port, 24-sealing rubber cover, 311-first valve sleeve, 32-first spring, 33-ball valve seat, 34-first ball valve, 35-first ejector rod, 312-second valve sleeve, 36-pilot ball valve, 313-third valve sleeve, 37-second spring, 38-second ejector rod, 41-armature press switch, 42-electromagnetic coil, 43-stroke adjusting screw, 211-third spring, 212-copper sleeve, 213-gland, 214-rubber cap, 215-copper core, 216-fourth spring, Zone 110-A, zone 120-B, zone 130-C, 140-pressure.

Detailed Description

In the description of the present invention, the terms "upper", "lower", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Meanwhile, the terms "first", "second", and the like are only used for distinguishing the names of the components, and have no primary and secondary relationship, so that the present invention is not limited.

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1-4:

a pilot-operated electromagnetic valve comprises a valve body 1, a valve cover 2, two control parts and two valve core assemblies 3, wherein the valve body 1 and the valve cover 2 are fixed through bolts.

One side of the valve body 1 is provided with an oil return port 11, an oil inlet 12 and two oil path output ports 13, two valve core holes 14 respectively communicated with the oil return port 11, the oil inlet 12 and the oil path output ports 13 are formed in the valve body 1, a flow guide channel for pressure oil to flow is further formed in the valve body 1, and the valve core assembly 3 is arranged in the valve core holes 14.

The control components include an armature press switch 41, a solenoid 42, an integrated control circuit, and a stroke adjustment screw 43. The armature pressing switch 41 is fixed on the upper part of the valve body 1, the stroke adjusting screw 43 is arranged on the armature pressing switch 41, the electromagnetic coil 42 is arranged inside the valve body 1, the integrated control circuit is hermetically placed in the valve body 1, and the stroke adjusting screw 43 is a 12.9-level stroke adjusting screw. The power line and the signal line of the control solenoid 42 are changed to integrated circuit control, so that the control circuit is simplified and the control accuracy is improved. The 12.9-level stroke adjusting screw 43 is used on the armature pressing switch 41, and the 12.9-level stroke adjusting screw 43 has higher strength and hardness, so that the repeated opening and closing action loss of the electromagnetic valve in the use process is avoided, and the opening action of the electromagnetic valve is inaccurate.

The valve core assembly 3 sequentially comprises a first valve sleeve 311, a first spring 32, a ball valve seat 33, a first ball valve 34, a first ejector rod 35, a second valve sleeve 312, a pilot ball valve 36, a third valve sleeve 313, a second spring 37 and a second ejector rod 38, wherein the first valve sleeve 311, the second valve sleeve 312 and the third valve sleeve 313 are fixed in a valve core hole 14 in the valve body through threads, and the valve core assembly 3 is fixed in the valve core hole 14. The second ejector rod 38 is connected with a stroke adjusting screw 43 and forms a lever mechanism with the armature pressing switch 41, and fine adjustment is performed by adjusting the stroke adjusting screw 43, so that the armature pressing switch 41 is at a proper position, the opening and closing of the pilot ball valve are further controlled, and finally the opening and closing of the electromagnetic valve are controlled. The armature pressing switch 41 of the solenoid valve uses the principle of a lever to realize the opening of the solenoid valve using a smaller magnetic attraction force.

The valve cover 2 is provided with two manual buttons 21, a cable connector 22 and two stroke adjusting ports 23. The valve cap 2 is further provided with a stepped hole, the manual button 21 is arranged in the stepped hole on the valve cap 2, and the manual button 21 comprises a third spring 211, a copper sleeve 212, a gland 213, a rubber cap 214, a copper core 215 and a fourth spring 216. The third spring 211, the copper sleeve 212, the gland 213 and the rubber cap 214 are arranged in a stepped hole on the valve cover, the gland 213 is tightly fastened on the valve cover 2 in an interference manner, and the rubber cap 214 is pressed tightly, so that the manual button 21 is fixed on the valve cover 2. The copper core 215 and the fourth spring 216 are arranged in the copper sleeve 212, and the copper core 215 is always connected with the armature pressing switch 41 under the action of the fourth spring 216. The two manual buttons 21 are respectively connected with the two armature pressing switches 41, so that the electromagnetic valve can be manually opened or closed under the condition of no power supply, and debugging and detection before the electromagnetic valve is powered on are facilitated. Cable joint 22 is sealed to be fastened on valve gap 2, and is connected with integrated control circuit, and cable joint 22 is the aviation connector, has improved the control accuracy. The stroke adjusting openings 23 are provided with sealing rubber covers 24, the sealing rubber covers 24 are detachable, the two stroke adjusting openings 23 correspond to the two stroke adjusting screws 43 respectively, and the stroke adjusting screws 43 can be adjusted by opening the sealing rubber covers 24.

The utility model discloses be equipped with two case holes 14 and two solenoid 42 in the valve body 1, make two main control valves of simultaneous control can be realized to this solenoid. The utility model discloses simple structure, easy maintenance, the practicality is high.

The utility model discloses the theory of operation of structure as follows:

referring to fig. 1, one side of a valve body 1 of the pilot-operated electromagnetic valve is provided with an oil return port 11, an oil inlet 12 and an oil path output port 13, and the oil return port 11 is connected with an external oil tank. When the electromagnetic valve is used, the external cable connector is connected with the cable connector 22 on the valve cover 2 through threads, and the power supply and the input signal of the electromagnetic valve are accessed through the cable connector 22 to control the opening and closing of the electromagnetic valve. The pressure 140 is the pressure amplified by the lever principle of the electromagnetic force generated after the electromagnetic coil 42 is energized, and acts on the second push rod 38 in the valve core assembly 3 to control the closing of the pilot ball valve 36. When the solenoid valve is not energized and no signal is input, the pilot ball valve 36 is in a normally open state.

When the electromagnetic valve is not electrified and no signal is input, the electromagnetic coil 42 is not electrified, the electromagnetic valve does not work, and the pilot ball valve 36 of the valve core assembly 3 is in a normally open state. The electromagnetic valve inputs pressure oil from the oil inlet 12, one path of the pressure oil enters the C area 130 through the flow guide channel, and the pressure oil entering the C area 130 enters the oil return port 11 through a gap between the second ejector rod 38 and the third valve sleeve 313 and finally returns to the oil tank. The other path of pressure oil enters the a zone 110, and the first ball valve 34 in the valve core assembly 3 closes the passage between the first valve sleeve 311 and the second valve sleeve 312 under the combined action of the pressure oil in the a zone 110 and the first spring 32, so that the pressure oil cannot enter the B zone 120.

When the electromagnetic coil 42 is connected with a power supply and a signal is input, the electromagnetic force generated by the coil attracts the armature pressing switch 41, the armature pressing switch 41 applies pressure 140 to the second ejector rod 38 through the stroke adjusting screw 43, the second ejector rod 38 pushes the pilot ball valve 36 to move downwards, and the pilot ball valve 36 closes a passage between the second valve sleeve 312 and the third valve sleeve 313, namely closes a passage between the B area 120 and the oil return opening 11. Meanwhile, the pilot ball valve 36 pushes the first push rod 35 to move downwards, the first push rod 35 pushes the first ball valve 34 to move downwards, the first ball valve 34 is pushed to be opened, a channel between the first valve sleeve 311 and the second valve sleeve 312 is opened, namely a channel between the area a 110 and the area B120 is opened, a pressure difference is formed between the two areas A, B, and the pressure oil in the area a 110 enters the area B120 through the first ball valve 34 and is output from the area B through the oil path output port 13.

When no signal is input to the electromagnetic coil 42, the electromagnetic force disappears, the pilot ball valve 36 is reopened under the action of the pressure oil, so that the pressure of the oil passage output port 13 is reduced, the first ball valve 34 moves upward under the action of the pressure oil and the first spring 32, the first ball valve 34 is reopened, the passage between the first valve sleeve 311 and the second valve sleeve 312 is closed, the pressure oil cannot enter the B area 120, and no pressure oil is output from the oil passage output port 13.

When the pilot-operated solenoid valve is not connected with a power supply, the opening and closing processes of the solenoid valve can be completed by pressing the manual button 21, and meanwhile debugging and detection before the solenoid valve is electrified are conveniently carried out.

It should be understood that the above description is only exemplary of the present invention and is not intended to limit the present invention, and that any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a pilot-operated solenoid valve, includes valve body, valve gap, two control unit and two case subassemblies, and the valve body passes through bolt fastening, its characterized in that with the valve gap: one side of the valve body is provided with an oil return port, an oil inlet and two oil path output ports, two valve core holes communicated with the oil return port, the oil inlet and the oil path output ports are arranged in the valve body, the valve core assembly is arranged in the valve core holes,

the control component comprises an armature pressing switch, an electromagnetic coil, an integrated control circuit and a stroke adjusting screw, the armature pressing switch is fixed on the upper part of the valve body, the stroke adjusting screw is arranged on the armature pressing switch, the electromagnetic coil is arranged in the valve body, the integrated control circuit is hermetically arranged in the valve body,

the valve cover is provided with a manual button, a cable connector and a stroke adjusting opening, the valve cover is further provided with a stepped hole, and the manual button is arranged in the stepped hole.

2. A pilot operated solenoid valve according to claim 1 wherein: the valve core assembly comprises a first valve sleeve, a first spring, a ball valve seat, a first ball valve, a first ejector rod, a second valve sleeve, a pilot ball valve, a third valve sleeve, a second spring and a second ejector rod, the first valve sleeve, the second valve sleeve and the third valve sleeve are sequentially arranged in the valve core hole, the first valve sleeve, the second valve sleeve and the third valve sleeve are fixed with the valve core hole through threads, the valve core assembly is fixed in the valve core hole, and the second ejector rod is connected with the stroke adjusting screw and forms a lever mechanism with the armature pressing switch.

3. A pilot operated solenoid valve according to claim 1 wherein: the manual button comprises a third spring, a copper sleeve, a gland, a rubber cap, a copper core and a fourth spring, the third spring, the copper sleeve, the gland and the rubber cap are arranged in a stepped hole in the valve cover, the gland is fastened on the valve cover in an interference mode, the copper core and the fourth spring are arranged in the copper sleeve, and the copper core is under the effect of the fourth spring and is connected with the armature pressing switch all the time.

4. A pilot operated solenoid valve according to claim 1 wherein: the stroke adjusting port is provided with a sealing rubber cover which is detachable.

5. A pilot operated solenoid valve according to claim 1 wherein: the cable joint is arranged on the valve cover in a sealing mode and is connected with the control integrated circuit.

6. A pilot operated solenoid valve according to claim 5 wherein: the cable joint is an aviation joint.

7. A pilot operated solenoid valve according to claim 1 wherein: the stroke adjusting screw is a 12.9-level stroke adjusting screw.

8. A pilot operated solenoid valve according to claim 1 wherein: the stroke adjusting openings are two.

9. A pilot operated solenoid valve according to claim 1 wherein: the number of the manual buttons is two.

10. A pilot operated solenoid valve according to claim 1 wherein: and a flow guide channel is also arranged in the valve body.

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