CN111692390A - Electromagnetic valve and working method thereof - Google Patents

Electromagnetic valve and working method thereof Download PDF

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Publication number
CN111692390A
CN111692390A CN202010545714.6A CN202010545714A CN111692390A CN 111692390 A CN111692390 A CN 111692390A CN 202010545714 A CN202010545714 A CN 202010545714A CN 111692390 A CN111692390 A CN 111692390A
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CN
China
Prior art keywords
valve core
armature
inlet
valve
coil
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CN202010545714.6A
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Chinese (zh)
Inventor
邵玉强
其他发明人请求不公开姓名
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Individual
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Individual
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Priority to CN202010545714.6A priority Critical patent/CN111692390A/en
Publication of CN111692390A publication Critical patent/CN111692390A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention discloses an electromagnetic valve and a working method thereof, wherein the electromagnetic valve comprises the following steps: the electromagnetic valve comprises a valve body and an electromagnetic coil assembly connected with the valve body, wherein an outlet T and a first pore passage are formed in the valve body, and the electromagnetic valve further comprises a control mechanism which is arranged between the valve body and the electromagnetic coil assembly and used for controlling the on-off of the position of the outlet T of the valve body. The invention has the advantages that: the electromagnetic valve can realize three functions of conduction, stop and safety, does not need to additionally increase a safety valve, can greatly save cost and simplify a pipeline compared with the prior art, thereby having compact volume and simple structure and reducing the manufacturing cost.

Description

Electromagnetic valve and working method thereof
Technical Field
The invention belongs to the technical field of electromagnetic valves, and particularly relates to an electromagnetic valve and a working method thereof.
Background
A solenoid valve is a known type of electronically operated valve. The solenoid valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. The electromagnetic valve is used in an industrial control system to adjust the direction, flow, speed and other parameters of a medium, can be matched with different circuits to realize expected control, and can ensure the control precision and flexibility. There are many types of solenoid valves, with different solenoid valves functioning at different locations in the control system. However, the existing electromagnetic valve has a single function and does not have a safety protection function, and when the electromagnetic valve is actually used, a safety valve is usually connected to a pipeline where the electromagnetic valve is located, so that the use cost and the complexity of the pipeline are invisibly increased.
Disclosure of Invention
In view of the above, it is desirable to provide a solenoid valve having on, off and safety functions and a method for operating the same.
The invention discloses a solenoid valve, comprising: the solenoid valve comprises a valve body and a solenoid coil assembly connected with the valve body, wherein an outlet T and a first pore passage are formed in the valve body, the solenoid valve further comprises a control mechanism, the control mechanism is arranged between the valve body and the solenoid coil assembly and used for controlling the on-off of the position of the outlet T of the valve body, and the control mechanism comprises: the joint is fixed at the lower end of the valve body, the upper end of the joint extends into the valve body, and the lower end surface of the joint is provided with an inlet P communicated with the interior of the valve body; the valve core is connected in the valve body in a sliding mode, the inlet P and the outlet T can be isolated by moving the valve core downwards and abutting against the upper end of the connector, the valve core and the connector can be separated by moving the valve core upwards, the inlet P and the outlet T can be communicated, and a T-shaped second hole channel is formed in the valve core; the return spring is arranged at the upper end of the valve core and always has a vertical downward acting force on the valve core, when the acting force of the pressure at the inlet P on the valve core is greater than the acting force of the return spring on the valve core, the valve core moves upwards and is separated from the joint, and when the acting force of the pressure at the inlet P on the valve core is less than the acting force of the return spring on the valve core, the valve core moves downwards under the action of the return spring and is pressed against the upper end of the joint; the two ends of the connecting sleeve are respectively in threaded connection with the valve body and the electromagnetic coil assembly, the connecting sleeve is respectively provided with a third pore channel and a fourth pore channel, the height of an inlet of the third pore channel is greater than that of an inlet of the fourth pore channel, and the fourth pore channel, the first pore channel and the second pore channel are always kept in a communicated state; the control sleeve, sliding connection in the adapter sleeve inner wall, and with solenoid subassembly fixed connection, be formed with the control chamber in the control sleeve, just set up the through-hole with the control chamber intercommunication on the control sleeve lateral wall, through solenoid subassembly drives vertical removal about the control sleeve to the control through-hole communicates with fourth pore and third pore in proper order when the control sleeve rebound.
In one embodiment, the electromagnetic coil assembly comprises: the electromagnetic tube is fixedly connected to the upper end of the connecting sleeve; the armature is connected in the electromagnetic tube in a sliding manner, is connected with the control sleeve and can drive the control sleeve to move up and down by the up-and-down movement of the armature; the two connecting springs are respectively arranged at the upper end and the lower end of the armature, the connecting springs are divided into a first spring and a second spring, the first spring is positioned above the second spring, and the armature can be ensured to be in a middle position through the pulling force of the first spring on the armature and the supporting force of the second spring on the armature; the two coils are sleeved on the electromagnetic tube and divided into a first coil and a second coil, the first coil is located above the second coil, and the first coil and the second coil can drive the armature to move up and down along the central line direction of the electromagnetic tube.
In one embodiment, a first limiting block is fixedly mounted on the inner side of the upper portion of the electromagnetic tube, the first spring is mounted between the first limiting block and the armature, a second limiting block is mounted on the inner side of the lower portion of the electromagnetic tube, the second spring is mounted between the second limiting block and the armature, and when the armature is only under the action of self gravity, the armature and the first limiting block and the second limiting block are both spaced.
In one embodiment, a connecting piece is integrally formed in the middle of the armature, and the connecting piece penetrates through the second limiting block and is fixedly connected with the control sleeve.
In one embodiment, the upper end of the reset spring is pressed against an adjusting rod, the adjusting rod penetrates through the upper end of the control sleeve, the second limiting block, the armature and the first limiting block and is fixedly connected with a threaded head, a threaded hole used for being connected with the threaded head is formed in the top surface of the first limiting block, and the threaded head can be rotated to drive the adjusting rod to move, so that the compression amount of the reset spring is changed.
An operating method of a solenoid valve, comprising: s1: the compression amount of the reset spring is changed through the adjusting rod, so that the set safety pressure is changed, namely the acting force of the reset spring on the valve core under the normal state is changed, when the first coil and the second coil are not electrified, the armature is in the middle position under the acting force of the first spring and the second spring, namely, the armature, the first limiting block and the second limiting block are both provided with intervals, so that the control sleeve is in the middle position, at the moment, the control cavity is communicated with the inlet P through the through hole, the fourth pore passage, the first pore passage and the second pore passage, so that the up-and-down pressure of the valve core is equal, at the moment, the pressure of the inlet P acts on the annular area (D1-D2) of the valve core and generates upward thrust on the valve core, when the acting force generated by the pressure of the inlet P acting on the valve core is greater than the acting force of the reset spring on the valve core under the normal state, the, at the moment, the pressure of the inlet P cannot continuously rise, and after the pressure of the inlet P drops, the valve core moves downwards under the action of the return spring and separates the inlet P from the outlet T again; s2: when the first coil is electrified and the second coil is not electrified, the armature moves upwards under the action of the magnetic field of the first coil and is in contact with the bottom surface of the first limiting block, so that the control cavity is communicated with the outlet T through the through hole and the third pore passage, the pressure of the inlet P acts on the area D1 of the valve core, and the valve core can move upwards under the very small pressure of the inlet P due to the fact that the area D1 is larger than the areas D1-D2, so that the inlet P is communicated with the outlet T, and the unloading function is achieved; s3: when the first coil is de-energized and the second coil is energized, the armature moves downwards under the action of the magnetic field of the second coil and contacts with the top surface of the second limiting block, so that the control cavity is isolated from the inlet P and the outlet T, the control cavity is a closed containing cavity, a medium in the control cavity cannot flow out, the valve port cannot be opened by the valve core moving upwards, namely, the inlet P and the outlet T are always kept in an isolated state, and the cut-off function is realized.
The technical scheme has the advantages that:
the electromagnetic valve can realize three functions of conduction, stop and safety, does not need to additionally increase a safety valve, can greatly save cost and simplify a pipeline compared with the prior art, thereby having compact volume and simple structure and reducing the manufacturing cost.
Drawings
FIG. 1 is a first structural diagram of a solenoid valve according to the present invention, which is in a safety function state;
FIG. 2 is a second structural diagram of a solenoid valve according to the present invention, which is in an unloading state;
FIG. 3 is a third structural diagram of a solenoid valve according to the present invention, which is in a cut-off state;
FIG. 4 is an enlarged view taken at A in FIG. 3;
fig. 5 is a working state diagram of a solenoid valve provided by the invention.
In the figure, a valve body 1, a first duct 101, a joint 2, a valve core 3, a second duct 31, a return spring 4, a connecting sleeve 5, a third duct 51, a fourth duct 52, a control sleeve 6, a through hole 61, a control cavity 62, a solenoid 7, a first spring 8, a second spring 9, an armature 10, a connecting piece 1001, a first coil 11, a second coil 12, a first limit block 13, a threaded hole 131, a second limit block 14, an adjusting rod 15 and a threaded head 151.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, 2, and 3, a solenoid valve includes: valve body 1 and with the solenoid assembly that valve body 1 links to each other, export T and first pore 101 have been seted up on valve body 1, the solenoid valve still including control mechanism, control mechanism set up in valve body 1 with between the solenoid assembly, control the export T position break-make of valve body 1, control mechanism includes: the joint 2 is fixed at the lower end of the valve body 1, the upper end of the joint 2 extends into the valve body 1, and the lower end face of the joint 2 is provided with an inlet P communicated with the interior of the valve body 1; the valve core 3 is slidably connected in the valve body 1, the inlet P and the outlet T can be separated by downward movement of the valve core 1 and abutting against the upper end of the connector 2, the valve core 3 can be separated from the connector 2 by upward movement of the valve core 3, so that the inlet P and the outlet T can be communicated, and a T-shaped second hole channel 31 is formed in the valve core 3; the reset spring 4 is installed at the upper end of the valve core 3 and always has a vertical downward acting force on the valve core 3, when the acting force of the pressure at the inlet P on the valve core 3 is greater than the acting force of the reset spring 4 on the valve core 3, the valve core 3 moves upwards and is separated from the joint 2, and when the acting force of the pressure at the inlet P on the valve core 3 is smaller than the acting force of the reset spring 4 on the valve core 3, the valve core 3 moves downwards under the action of the reset spring 4 and presses against the upper end of the joint 2; the two ends of the connecting sleeve 5 are respectively connected to the valve body 1 and the electromagnetic coil assembly in a threaded manner, the connecting sleeve 5 is respectively provided with a third duct 51 and a fourth duct 52, the height of an inlet of the third duct 51 is greater than that of an inlet of the fourth duct 52, and the fourth duct 52, the first duct 101 and the second duct 31 are always kept in a communicated state; control sleeve 6, sliding connection in 5 inner walls of adapter sleeve, and with solenoid assembly fixed connection, be formed with control chamber 62 in the control sleeve 6, just set up the through-hole 61 with control chamber 62 intercommunication on the 6 lateral walls of control sleeve, through solenoid assembly drives vertical removal about control sleeve 6 to control through-hole 61 communicates with fourth pore way 52 and third pore way 51 in proper order when control sleeve 6 rebound.
Preferably, as shown in fig. 1, the electromagnetic coil assembly includes: the electromagnetic tube 7 is fixedly connected to the upper end of the connecting sleeve 5; the armature 10 is connected in the electromagnetic tube 7 in a sliding manner, the armature 10 is connected with the control sleeve 6, and the control sleeve 6 can be driven to move up and down by the up-and-down movement of the armature 10; the two connecting springs are respectively arranged at the upper end and the lower end of the armature 10 and are divided into a first spring 8 and a second spring 9, the first spring 8 is positioned above the second spring 9, and the armature 10 can be ensured to be in a middle position through the pulling force of the first spring 8 on the armature 10 and the supporting force of the second spring 9 on the armature 10; the two coils are sleeved on the electromagnetic tube 7 and are divided into a first coil 11 and a second coil 12, the first coil 11 is located above the second coil 12, and the first coil 11 and the second coil 12 can drive the armature 10 to move up and down along the central line direction of the electromagnetic tube 7.
Preferably, as shown in fig. 1, a first limit block 13 is fixedly installed on the inner side of the upper portion of the electromagnetic tube 7, the first spring 8 is installed between the first limit block 13 and the armature 10, a second limit block 14 is installed on the inner side of the lower portion of the electromagnetic tube 7, the second spring 9 is installed between the second limit block 14 and the armature 10, and when the armature 10 is only under the action of self gravity, the armature 10 has a distance from the first limit block 13 to the second limit block 14.
It is worth mentioning that, the first stopper 13 and the second stopper 14 both form an inclined plane towards one side of the armature, and simultaneously, the upper and lower both ends of the armature also form an inclined plane, when the armature 10 moves upwards or downwards, the end part thereof can move along the inclined plane and be inserted into the first stopper 13 or the second stopper 14, thereby playing a guiding role.
Preferably, as shown in fig. 1, a connecting piece 1001 is integrally formed in the middle of the armature 10, and the connecting piece 1001 passes through the second stopper 14 and is fixedly connected with the control sleeve 6.
It is worth mentioning that the outer side wall of the connecting piece 1001 is in clearance fit with the second limiting block 14, so that the armature 10 is prevented from influencing the second limiting block 14 when the connecting piece 1001 drives the control sleeve 6 to move up and down.
Preferably, as shown in fig. 1, the upper end of the return spring 4 is pressed against an adjusting rod 15, the adjusting rod 15 passes through the upper end of the control sleeve 6, the second limiting block 14, the armature 10 and the first limiting block 13 and is fixedly connected with a threaded head 151, a threaded hole 131 used for being connected with the threaded head 151 is formed in the top surface of the first limiting block 13, and the adjusting rod 15 can be driven to move by rotating the threaded head 151, so that the compression amount of the return spring 4 is changed.
It is worth mentioning that the reset spring 4 is located in the control cavity 62, vertical through holes are formed in the centers of the upper end of the control sleeve 6, the second limiting block 14, the armature 10 and the first limiting block 13, the adjusting rod 15 penetrates through the vertical through holes and presses the upper end of the reset spring 4 to adjust the compression amount of the reset spring 4, and the adjusting rod 15 is in clearance fit with the vertical through holes.
As shown in fig. 1, 2, 3 and 4, a method for operating a solenoid valve includes: s1: firstly, the compression amount of the return spring 4 is changed through the adjusting rod 15, so that the set safety pressure is changed, namely, the acting force of the return spring 4 on the valve core 3 under the normal state is changed, when the first coil 11 and the second coil 12 are not electrified, the armature 10 is in the middle position under the acting force of the first spring 8 and the second spring 9, namely, the armature 10, the first limiting block 13 and the second limiting block 14 are both provided with intervals, so that the control sleeve 6 is in the middle position, at the moment, the control cavity 62 is communicated with the inlet P through the through hole 61, the fourth hole 52, the first hole 101 and the second hole 31, so that the upper pressure and the lower pressure of the valve core 3 are equal, at the moment, the inlet P pressure acts on the annular area (D1-D2) of the valve core 3 and generates upward thrust on the valve core 3, and when the acting force generated by the inlet P pressure acting on the valve core 3 is greater than the acting force of the return, the valve core 3 moves upwards to enable the inlet P to be communicated with the outlet T, so that the overflow protection effect is achieved, the pressure of the inlet P cannot continuously rise at the moment, and after the pressure of the inlet P drops, the valve core 3 moves downwards and separates the inlet P from the outlet T again under the action of the reset spring 4; s2: when the first coil 11 is electrified and the second coil 12 is deenergized, the armature 10 moves upward under the action of the magnetic field of the first coil 11 and is in contact with the bottom surface of the first limit block 13, so that the control cavity 62 is communicated with the outlet T through the through hole 61 and the third hole passage 51, at the moment, the pressure of the inlet P acts on the area D1 of the valve core 3, and the valve core 3 can move upward under the very small pressure of the inlet P due to the fact that the area D1 is larger than the areas (D1-D2), so that the inlet P is communicated with the outlet T, and the unloading function is achieved; s3: when the first coil 11 is de-energized and the second coil 12 is energized, the armature 10 moves downward under the action of the magnetic field of the second coil 12 and contacts with the top surface of the second limiting block 14, so that the control cavity 62 is isolated from the inlet P and the outlet T, the control cavity 62 is a closed cavity, the medium in the control cavity 62 cannot flow out, the valve core 3 cannot move upward to open the valve port, i.e., the inlet P and the outlet T always keep an isolated state, and the cut-off function is realized.
The working mode of the invention is as follows: when the electromagnetic valve is in an unloading function, the first coil 11 is electrified, the second coil 12 is still in a power-off state, the armature 10 moves upwards under the action of the magnetic field of the first coil 11, so that the control cavity 62 is communicated with the outlet T through the through hole 61 and the third hole 51, the fluid pressure of the inlet P acts on the D1 area of the valve core 3, and the area of D1 is larger than the area of (D1-D2), so that the valve core 3 can move upwards under the small fluid pressure at the inlet P, the inlet P is communicated with the outlet T, and fluid can rapidly pass through. When the electromagnetic valve is in a safety protection function, the first coil 11 and the second coil 12 are both in a power-off state, at this time, the armature 10 is in a middle position under the acting force of the first spring 8 and the second spring 9, and drives the control sleeve 6 to be in the middle position, so that the control cavity 62 is communicated with the inlet P through the through hole 61, the fourth hole 52, the first hole 101 and the second hole 31, that is, the upper and lower pressures of the valve core 3 are kept equal, as shown in fig. 5, when the fluid pressure of the inlet P on the valve core 3 is greater than the safety pressure, the valve core 3 moves upwards and enables the inlet P to be communicated with the outlet T, the fluid can overflow, after the fluid pressure of the inlet P is reduced, under the acting force of the return spring 4, the valve core 3 moves downwards and re-blocks the inlet P from the outlet T, when the electromagnetic valve is in a cut-off function, the second coil 12 is energized, and the first coil 11 is, the armature 10 moves downwards under the action of the magnetic field of the second coil 12 at the moment, so that the control cavity 62 is not communicated with the inlet P and the outlet T in a separated mode, the control cavity 62 is a closed containing cavity at the moment, the medium cannot flow out, the valve core 3 cannot move, namely, the inlet P and the outlet T are always kept in a separated state, the electromagnetic valve can be switched on, switched off and has three safety functions, compared with the prior art, the electromagnetic valve does not need to be additionally provided with a safety valve, the cost can be greatly saved, the pipeline can be simplified, the electromagnetic valve is compact in size, simple in structure and low in manufacturing cost.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (6)

1. A solenoid valve, comprising: the electromagnetic valve is characterized in that an outlet T and a first pore channel are formed in the valve body, the electromagnetic valve further comprises a control mechanism, the control mechanism is arranged between the valve body and the electromagnetic coil assembly and controls the opening and closing of the outlet T position of the valve body, and the control mechanism comprises:
the joint is fixed at the lower end of the valve body, the upper end of the joint extends into the valve body, and the lower end surface of the joint is provided with an inlet P communicated with the interior of the valve body;
the valve core is connected in the valve body in a sliding mode, the inlet P and the outlet T can be isolated by moving the valve core downwards and abutting against the upper end of the connector, the valve core and the connector can be separated by moving the valve core upwards, the inlet P and the outlet T can be communicated, and a T-shaped second hole channel is formed in the valve core;
the return spring is arranged at the upper end of the valve core and always has a vertical downward acting force on the valve core, when the acting force of the pressure at the inlet P on the valve core is greater than the acting force of the return spring on the valve core, the valve core moves upwards and is separated from the joint, and when the acting force of the pressure at the inlet P on the valve core is less than the acting force of the return spring on the valve core, the valve core moves downwards under the action of the return spring and is pressed against the upper end of the joint;
the two ends of the connecting sleeve are respectively in threaded connection with the valve body and the electromagnetic coil assembly, the connecting sleeve is respectively provided with a third pore channel and a fourth pore channel, the height of an inlet of the third pore channel is greater than that of an inlet of the fourth pore channel, and the fourth pore channel, the first pore channel and the second pore channel are always kept in a communicated state;
the control sleeve, sliding connection in the adapter sleeve inner wall, and with solenoid subassembly fixed connection, be formed with the control chamber in the control sleeve, just set up the through-hole with the control chamber intercommunication on the control sleeve lateral wall, through solenoid subassembly drives vertical removal about the control sleeve to the control through-hole communicates with fourth pore and third pore in proper order when the control sleeve rebound.
2. The solenoid valve of claim 1 wherein said solenoid assembly comprises:
the electromagnetic tube is fixedly connected to the upper end of the connecting sleeve;
the armature is connected in the electromagnetic tube in a sliding manner, is connected with the control sleeve and can drive the control sleeve to move up and down by the up-and-down movement of the armature;
the two connecting springs are respectively arranged at the upper end and the lower end of the armature, the connecting springs are divided into a first spring and a second spring, the first spring is positioned above the second spring, and the armature can be ensured to be in a middle position through the pulling force of the first spring on the armature and the supporting force of the second spring on the armature;
the two coils are sleeved on the electromagnetic tube and divided into a first coil and a second coil, the first coil is located above the second coil, and the first coil and the second coil can drive the armature to move up and down along the central line direction of the electromagnetic tube.
3. The electromagnetic valve according to claim 2, wherein a first limit block is fixedly installed on the inner side of the upper portion of the electromagnetic tube, the first spring is installed between the first limit block and the armature, a second limit block is installed on the inner side of the lower portion of the electromagnetic tube, the second spring is installed between the second limit block and the armature, and when the armature is only under the action of self gravity, a distance exists between the armature and the first limit block as well as between the armature and the second limit block.
4. The electromagnetic valve according to claim 3, characterized in that a connecting piece is integrally formed in the middle of the armature, and the connecting piece penetrates through the second limiting block and is fixedly connected with the control sleeve.
5. The electromagnetic valve according to claim 3, wherein the upper end of the return spring is pressed against an adjusting rod, the adjusting rod penetrates through the upper end of the control sleeve, the second limiting block, the armature and the first limiting block and is fixedly connected with a threaded head, a threaded hole used for being connected with the threaded head is formed in the top surface of the first limiting block, and the adjusting rod can be driven to move by rotating the threaded head, so that the compression amount of the return spring is changed.
6. An operating method of a solenoid valve to which any one of the solenoid valves according to claims 1 to 5 is applied, comprising:
s1: the compression amount of the reset spring is changed through the adjusting rod, so that the set safety pressure is changed, namely the acting force of the reset spring on the valve core under the normal state is changed, when the first coil and the second coil are not electrified, the armature is in the middle position under the acting force of the first spring and the second spring, namely, the armature, the first limiting block and the second limiting block are both provided with intervals, so that the control sleeve is in the middle position, at the moment, the control cavity is communicated with the inlet P through the through hole, the fourth pore passage, the first pore passage and the second pore passage, so that the up-and-down pressure of the valve core is equal, at the moment, the pressure of the inlet P acts on the annular area (D1-D2) of the valve core and generates upward thrust on the valve core, when the acting force generated by the pressure of the inlet P acting on the valve core is greater than the acting force of the reset spring on the valve core under the normal state, the, at the moment, the pressure of the inlet P cannot continuously rise, and after the pressure of the inlet P drops, the valve core moves downwards under the action of the return spring and separates the inlet P from the outlet T again;
s2: when the first coil is electrified and the second coil is not electrified, the armature moves upwards under the action of the magnetic field of the first coil and is in contact with the bottom surface of the first limiting block, so that the control cavity is communicated with the outlet T through the through hole and the third pore passage, the pressure of the inlet P acts on the area D1 of the valve core, and the valve core can move upwards under the very small pressure of the inlet P due to the fact that the area D1 is larger than the areas D1-D2, so that the inlet P is communicated with the outlet T, and the unloading function is achieved;
s3: when the first coil is de-energized and the second coil is energized, the armature moves downwards under the action of the magnetic field of the second coil and contacts with the top surface of the second limiting block, so that the control cavity is isolated from the inlet P and the outlet T, the control cavity is a closed containing cavity, a medium in the control cavity cannot flow out, the valve port cannot be opened by the valve core moving upwards, namely, the inlet P and the outlet T are always kept in an isolated state, and the cut-off function is realized.
CN202010545714.6A 2020-06-16 2020-06-16 Electromagnetic valve and working method thereof Withdrawn CN111692390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010545714.6A CN111692390A (en) 2020-06-16 2020-06-16 Electromagnetic valve and working method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010545714.6A CN111692390A (en) 2020-06-16 2020-06-16 Electromagnetic valve and working method thereof

Publications (1)

Publication Number Publication Date
CN111692390A true CN111692390A (en) 2020-09-22

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Family Applications (1)

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CN202010545714.6A Withdrawn CN111692390A (en) 2020-06-16 2020-06-16 Electromagnetic valve and working method thereof

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Country Link
CN (1) CN111692390A (en)

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Application publication date: 20200922