CN109340403B - Electric valve - Google Patents
Electric valve Download PDFInfo
- Publication number
- CN109340403B CN109340403B CN201811540878.9A CN201811540878A CN109340403B CN 109340403 B CN109340403 B CN 109340403B CN 201811540878 A CN201811540878 A CN 201811540878A CN 109340403 B CN109340403 B CN 109340403B
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- Prior art keywords
- valve
- iron core
- cavity
- medium
- valve rod
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Classifications
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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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
- 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
- F16K31/0603—Multiple-way valves
- F16K31/0624—Lift valves
- F16K31/0627—Lift valves with movable valve member positioned between seats
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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
- 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
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
Abstract
The invention provides an electric valve, which comprises an electric actuator cavity and a valve cavity, wherein the electric actuator cavity and the valve cavity are separated by a magnetic conduction plate, the valve cavity is provided with at least one medium inlet and at least one medium outlet, a valve seat is arranged between the medium inlet and the medium outlet, and a valve head matched with the valve seat in a sealing way is arranged on the valve seat; an electromagnetic coil is arranged in the cavity of the electric actuator, a movable iron core and a fixed iron core are coaxially arranged in the inner cavity of the electromagnetic coil, a spring is arranged between the movable iron core and the fixed iron core, the movable iron core is fixed on a valve rod, the movable iron core is positioned in a sealed back pressure cavity, the valve rod penetrates through a magnetic guide plate to be fixedly connected with a valve head, and a flow guide channel which is communicated with the valve cavity and the back pressure cavity is arranged on the valve rod. The problems of low rated pressure and poor reliability, which can be born by a medium inlet and outlet closing state, of the electric valve in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of electric valves, in particular to an electric valve for switching the running state of the electric valve by controlling the on-off of a power supply.
Background
The electric actuating mechanism and the valve are connected to form the electric valve after installation and debugging. The electric valve uses electric energy as power to switch on the electric actuating mechanism to drive the valve, so as to realize the opening and closing and adjusting actions of the valve. Thereby achieving the purpose of switching or adjusting the pipeline medium. The method is mainly applied to the automobile heat management and air conditioning system.
In the prior art, the reversing of the electric valve is usually realized by controlling the electrifying of electromagnets positioned on different medium channels to adsorb the valve body, so that the valve body is positioned on different medium channels, and the on-off of each medium channel is controlled. However, the structure is complex, and the control sensitivity is low.
When the electric valve is used on a high-pressure medium channel to control on-off or reversing of the high-pressure medium, the valve head and the valve seat in the high-pressure medium are usually subjected to the pressure action of the high-pressure medium, so that the relative positions of the valve head and the valve seat are changed, the valve head and the valve seat can be opened when the valve head and the valve seat are originally closed and are closed when the valve head and the valve seat are originally opened, and the reliability of the electric valve is affected.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an electric valve, which solves the problems of low rated pressure and poor reliability of the closed state of a medium inlet and outlet under the condition of no power on due to complex structure of the electric valve in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the electric valve comprises an electric actuator cavity and a valve cavity, wherein the electric actuator cavity and the valve cavity are separated by a magnetic conduction plate, the bottom of the valve cavity is provided with a sealing gasket, the valve cavity is provided with at least one medium inlet and at least one medium outlet, a valve seat is arranged between the medium inlet and the medium outlet, and the valve seat is provided with a valve head matched with the valve seat in a sealing way;
an electromagnetic coil is arranged in the cavity of the electric actuator, a movable iron core and a fixed iron core are coaxially arranged in the inner cavity of the electromagnetic coil, a spring is arranged between the movable iron core and the fixed iron core, the movable iron core is fixed on a valve rod, the movable iron core is positioned in a sealed back pressure cavity, the valve rod penetrates through a magnetic guide plate to be fixedly connected with a valve head, and a flow guide channel which is communicated with the valve cavity and the back pressure cavity is arranged on the valve rod.
Further, a valve rod inner hole penetrating along the axial direction of the valve rod is formed in the valve rod, a first diversion hole penetrating through the side wall of the valve rod is formed in one end, adjacent to the valve head, of the valve rod, a second diversion hole penetrating through the side wall of the valve rod is formed in the valve rod located in the back pressure cavity, and a diversion channel is formed by the first diversion hole, the second diversion hole and the valve rod inner hole.
Further, one end of the movable iron core, which faces the fixed iron core, is provided with a conical boss, one end of the fixed iron core, which faces the movable iron core, is provided with a conical concave hole corresponding to the conical boss, and the spring is positioned in the conical concave hole. The contact surface between the movable iron core and the fixed iron core is designed into a form that the conical boss is matched with the conical concave hole, so that the contact area is increased, the adsorption force between the movable iron core and the fixed iron core is increased, and the reliability of the electric valve is improved; and after the movable iron core and the fixed iron core are adsorbed, the conical contact surface can prevent the movable iron core from moving in the radial direction, and the valve head and the valve seat are ensured to be aligned accurately, so that the tightness of the valve head and the valve seat is ensured.
Further, a buffer is provided at the top of the valve stem. The buffer piece can avoid noise pollution and damage to other parts of the electric valve caused by the fact that the movable iron core loses magnetic force and is sprung out by the spring.
Further, the electric actuator cavity is formed by encircling the magnetic conduction cylinder and the magnetic conduction plate. The magnetic conductive barrels and the magnetic conductive plates at two ends of the electromagnetic coil are made of magnetic conductive materials, can integrate magnetic circuits, and strengthen magnetic force of the movable iron core and the fixed iron core so as to improve sensitivity and reliability of the electric valve.
Further, the fixed iron core is fixed on the top surface of the magnetic conduction cylinder, a guide hole for the valve rod to axially move is formed in the fixed iron core, and the movable iron core is located below the fixed iron core. The guide hole in the fixed iron core can enable the valve rod to move vertically along the axial direction all the time so as to ensure accurate matching of the valve head and the valve seat which are connected with the valve rod into a whole, thereby improving the reliability of the electric valve.
Further, a plug is arranged on the magnetic conduction cylinder, and the electromagnetic coil is electrically connected to the plug after being connected with the diode in parallel. The plug is used for connecting an external control system to control the on-off of the electromagnetic coil, so as to control the switching of the medium channel inside the electric valve; the parallel diode is used for protecting the power supply.
Further, the valve head is in sealing fit with the valve seat through conical surfaces, and conical surfaces which can be in sealing fit with the valve head are arranged at two ends of the valve seat. The conical surface has good sealing performance, is not easy to accumulate impurities, and has high sealing reliability; the conical surfaces are arranged at the two ends of the valve seat, and the conical surfaces in different directions can be selected to be matched with the valve body according to actual use requirements of the electric valve, so that the application range of the electric valve is increased.
Further, a plurality of mounting lugs are integrally formed on the shell forming the valve cavity, the plurality of mounting lugs are symmetrically arranged on the shell, mounting holes are formed in the mounting lugs, and metal rings are embedded in the mounting holes. The mounting lug is integrally formed with the shell, so that the mounting is more stable; the mounting lugs are symmetrically arranged, so that the electric valve can be free from the restriction of the mounting direction, and the application range of the electric valve is increased; the metal ring embedded in the mounting hole can strengthen the strength of the mounting hole and avoid the mounting hole from being squeezed and cracked when the connecting piece is installed.
The beneficial effects of the invention are as follows: the motor-driven valve can simultaneously control the reversing of a plurality of medium channels through one electromagnetic coil, so that the structure is simplified, the motor-driven valve is lighter, and the failure probability of the motor-driven valve is reduced.
Under the condition that the electromagnetic coil is powered off, when the high-pressure medium impacts the valve head, the high-pressure medium enters the back pressure cavity from the flow guide channel on the valve rod, the pressure of the valve head is balanced for the movable iron core positioned in the back pressure cavity, and as the movable iron core and the valve head are positioned in the same medium, the two opposite forces are always equal, so that the two opposite forces are offset each other, and in addition, the elastic force of a spring between the valve head and the valve seat enables the valve head and the valve seat to be in sealing fit all the time, so that the electric valve can be applied to the high-pressure medium, and under the non-electrified working condition, the rated pressure bearable by the closing state of the medium inlet and outlet is large, and the reliability of the electric valve is improved.
Drawings
Fig. 1 is an exploded view of an electrically operated valve.
Fig. 2 is a schematic diagram of a first application structure of the electric valve.
Fig. 3 is a schematic diagram of two application structures of the electric valve.
Fig. 4 is a schematic diagram of a third application structure of the electric valve.
1, an electric actuator cavity; 2.a valve cavity; 21. a medium inlet; 22.a medium outlet; 23. a mounting ear; 231. a mounting hole; 232. a metal ring; 3. a valve seat; 4. a valve head; 5. a valve stem; 51. a diversion channel; 511. a first deflector aperture; 512. a second deflector aperture; 513. a valve rod inner hole; 6. a movable iron core; 61. conical concave holes; 7. fixing an iron core; 71. a conical boss; 72. a guide hole; 8. an electromagnetic coil; 9. a magnetic conductive plate; 91. a sealing gasket; 10. a spring; 11. a buffer member; 12. a magnetic conduction cylinder; 13. a plug; 14. a back pressure chamber.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1, the electric valve includes an electric actuator chamber 1 and a valve chamber 2 through which a medium flows, which are hermetically partitioned by a magnetic conductive plate 9 provided with a gasket 91 at the bottom. The valve is characterized in that a medium inlet 21 and a medium outlet 22 are arranged on the valve cavity 2 according to requirements, a medium channel is formed between the medium inlet 21 and the medium outlet 22, different medium channels can be formed according to arrangement and combination between different medium inlets and different medium outlets, a valve seat 3 is embedded on each medium channel for conveniently controlling on-off of each medium channel, a valve head 4 in sealing fit with the valve seat 3 is arranged on the valve seat 3, and on-off of the medium channel is controlled by controlling the interval distance between the valve head 4 and the valve seat 3.
The center of the valve seat 3 is provided with a through hole, and two ends of the hole are outwards opened conical surfaces, namely a bell mouth. The valve head 4 is provided with a conical surface corresponding to the flare on the valve seat 3, and the matched conical surface can achieve the sealing effect after the valve seat 3 is tightly attached to the valve head 4. Ensuring adequate contact of the valve head 4 with the valve seat 3 is critical to ensuring the tightness of the present electrically operated valve.
The valve head 4 is fixedly sleeved on the valve rod 5, and the valve rod 5 passes through the magnetic conduction plate 9 and is led into the electric actuator cavity 1. An electromagnetic coil 8 is fixed in the electric actuator cavity 1, and the winding condition of the electromagnetic coil 8 and the magnetic force generating relation and other conditions are mature technologies in the prior art, and are not repeated here. For integrating the magnetic circuit of the electromagnetic coil 8, the magnetic conductive plate 9 and the magnetic conductive cylinder 12, which enclose the electric actuator cavity 1, are made of a magnetic conductive material, such as ferrite material.
The magnetic conduction plate 9, the magnetic conduction cylinder 12 and the valve cavity 2 are connected into a whole through screws, a sealing gasket 91 made of rubber material is clamped between the magnetic conduction plate 9 and the valve cavity 2, and a hole for the valve rod 5 to pass through is formed in the middle of the sealing gasket 91. A plug 13 electrically connected to the outside is attached to the magnetic tube 12. The electromagnetic coil 8 is connected in parallel with the diode and then electrically connected to the plug 13. The plug 13 is connected with an external control system and is used for controlling the on-off of the current in the electromagnetic coil 8.
The movable iron core 6 and the fixed iron core 7 are coaxially arranged in the inner cavity of the electromagnetic coil 8, so that when the electromagnetic coil 8 is electrified, the movable iron core 6 and the fixed iron core 7 can be magnetized. The fixed iron core 7 is fixed in the electric actuator cavity 1, and the movable iron core 6 is fixedly sleeved on the valve rod 5 through interference fit, so that the valve head 4 moves along with the movement of the movable iron core 6 under the drive of the valve rod 5.
The movable iron core 7 is provided with a conical boss 71 toward one end of the fixed iron core 6, and the fixed iron core 6 is provided with a conical concave hole 61 corresponding to the conical boss 71 toward one end of the movable iron core 7. The spring 10 is a compression spring, which is sleeved on the valve rod 5 and is positioned in the conical concave hole 61, when the electromagnetic coil 8 is not electrified, the fixed iron core 6 and the movable iron core 7 squeeze the spring 10, the extrusion force received by the spring 10 is inversely proportional to the assembly distance between the fixed iron core 6 and the movable iron core 7, and the valve head 4 is in sealing fit with the valve seat 3 through the extrusion force of the spring.
When the electromagnetic coil 8 is electrified, the electromagnet generates magnetism, the fixed iron core 7 and the movable iron core 6 are both in a magnetic field generated by the electromagnetic coil 8 and magnetized, and according to ampere rule, the opposite end magnetic poles of the fixed iron core 7 and the movable iron core 6 are opposite to each other, so that attractive force is generated, the fixed iron core 7 attracts the movable iron core 6, the spring 10 is further compressed, and the valve head 4 moves along with the movable iron core 6, so that the on-off state of a medium channel is changed. After power failure, the compressed spring 10 returns the plunger 6 to its original position. In order to prevent the movable iron core 6 from striking the magnetic conductive cylinder 12 in the process of being rebounded, noise and vibration are generated and even the electric valve is damaged, a buffer piece 11 is fixed between the top of the movable iron core 6 and the magnetic conductive cylinder 12, and the buffer piece 11 is a rubber pad and is used for absorbing the momentum of the movable iron core 6 rebounded by the spring 10.
The valve rod 5 is a cylindrical rod, and a valve rod inner hole 513 penetrating along the axial direction of the valve rod 5 is arranged on the valve rod 5, namely, the valve rod 5 is a cylinder with an annular section. One end of the valve rod 5 adjacent to the valve head 4 is provided with a first diversion hole 511 penetrating through the side wall thereof, the valve rod 5 positioned in the back pressure cavity 14 is provided with a second diversion hole 512 penetrating through the side wall thereof, and the first diversion hole 511, the second diversion hole 512 and the valve rod inner hole 513 form a diversion channel 51. The specific position of the diversion hole 511 is designed into different positions according to the actual use environment of the electric valve, so that the medium impacting the valve head 4 is introduced into the back pressure cavity 14 through the diversion channel 51 on the closed medium channel, so that the two ends of the integral structure formed by the valve head 4, the valve rod 5 and the movable iron core 7 are subjected to the opposite pressure of the same medium, the impact force of the medium on the valve head 4 is balanced, and the electric valve is prevented from losing effectiveness under the impact action of the medium.
O-shaped sealing rings are tightly sleeved on the outer cylindrical surfaces of the movable iron core 6 and the fixed iron core 7, and the O-shaped sealing rings are sealed through extrusion between the movable iron core 6 or the fixed iron core 7 and a framework wound with the electromagnetic coil 8, so that a back pressure cavity 14 is formed in a cylinder space between the two O-shaped sealing rings.
In order to prevent the installation of the electric valve from being limited by the direction, the shell forming the valve cavity 2 is integrally provided with the installation lugs 23, the installation lugs 23 are symmetrically distributed at 180 degrees and are parallel to the medium inlet 21 or the medium outlet 22, and the installation lugs 23 are provided with the installation holes 231. Since the housing forming the valve cavity 2 is typically a molded plastic part, in order to prevent the connector from being squeezed into the mounting lugs 23 during mounting, a metal ring 232 is fitted into the mounting hole 231 to increase the strength of the mounting hole 232.
As shown in fig. 2, in embodiment 1 of the present electric valve, the electric valve is mainly used for controlling the on-off of a medium, and the movable iron core 6 is located below the fixed iron core 7. The valve cavity 2 only comprises a medium inlet 21 and a medium outlet 22, the medium inlet 21 is positioned at the lower end of the medium outlet 22, the valve head 4 is in sealing fit with a bell mouth at the upper end of the valve seat 3, and the electric valve is only used for controlling the on-off of a medium.
When the electromagnetic coil 8 is not electrified, the valve formed by the valve head 4 and the valve seat 3 is in a closed state, high-pressure medium enters from the medium inlet 21 and is blocked from further advancing by the valve head 4, at the moment, high-pressure medium can exert upward pressure on the bottom surface of the valve head 4 due to high pressure in the medium, but the high-pressure medium can enter into the back pressure cavity 14 through the first diversion hole 511 at the bottom of the valve head 4, and the high-pressure medium can exert downward pressure on the top surface of the movable iron core 6 positioned in the back pressure cavity 14, so that the force exerted by the high-pressure medium on the valve head 4 is almost balanced, and the two forces are almost equal regardless of the pressure in the high-pressure medium, so that the valve failure caused by the flushing of the valve head 4 by the high-pressure medium is avoided.
When the electromagnetic coil 8 is energized, the fixed iron core 7 and the movable iron core 6 are magnetized, the fixed iron core 7 attracts the movable iron core 6 and adsorbs together, meanwhile, the spring 10 is compressed, the medium in the back pressure chamber 14 is pressed back into the valve chamber 2, at this time, the valve is opened, and the medium flows out from the medium outlet 22.
As shown in fig. 3, in embodiment 2 of the present electric valve, the electric valve is mainly used for switching the flow direction of the medium, and the movable core 6 is located below the fixed core 7. Port a is a media inlet 21 and ports b and C are media outlets 22. The port A and the port B form a first medium channel, a valve head 4 on the channel is matched with a horn mouth at the upper end of a valve seat 3, and the valve is closed in a power-off state; the port A and the port C are second medium channels, the valve head 4 on the channels is matched with the horn mouth at the lower end of the valve seat 3, and the valve is opened in the power-off state.
In the de-energized state, the high pressure medium enters from port a and exits from port C, the high pressure medium exerting an upward pressure on the bottom surface of the valve head 4 on the first medium passage. The principle is the same as that of embodiment 1 in that the first diversion hole 511 is provided between the valve seat on the first medium passage and the valve seat on the second medium passage, and the first diversion hole 511 introduces the high-pressure medium into the pressure preparation chamber 14, so that the force applied by the high-pressure medium to the valve head 4 on the first medium passage is balanced.
In the energized state, the fixed iron core 7 adsorbs the movable iron core 6, drives the valve rod 5 to move upwards, enables the first medium channel to be opened, enables the second medium channel to be closed, and enables the medium to flow out of the port B, so that the flow direction of the medium is changed, and meanwhile, the medium in the back pressure cavity 14 is extruded. When the power is cut off again, the movable iron core 6 is bounced back to the original position by the spring, the first medium channel is closed, the second medium channel is opened, and the medium enters the standby pressure cavity 14 again to protect the electric valve from failure, so that the flow direction of the medium can be controlled by switching on and off.
As shown in fig. 4, in embodiment 3 of the present electric valve, the movable core 6 is located above the fixed core 7, and the movable core 6 is mainly used for switching the direction of the medium. Port a is a media outlet 22 and ports b and C are media inlets 21. The port B and the port A form a first medium channel, a valve head 4 on the channel is matched with a horn mouth at the lower end of a valve seat 3, and the valve is closed in a power-off state; the port C and the port A are second medium channels, the valve head 4 on the channels is matched with the horn mouth at the upper end of the valve seat 3, and the valve is opened in the power-off state.
Under the power-off state, a high-pressure medium on a medium pipeline connected with the port C enters from the port C and flows out from the port A; the medium on the medium pipeline connected with the port B enters from the port B and is blocked by the valve head 4 on the first medium channel from reaching the port A. Because the upper end and the lower end of the valve head 4 on the first medium channel are contacted with the medium, the failure of the electric valve can be avoided by controlling the pressure of the medium introduced by the two medium inlets to be approximately equal.
However, since the valve rod 5 needs to move up and down, gaps exist between the valve rod 5 and the magnetic conductive plate 9 and between the valve rod 5 and the fixed iron core 7, the medium entering from the port B can enter the pressure preparation cavity 14 through the gaps between the valve rod 5 and the magnetic conductive plate 9 and between the valve rod 5 and the fixed iron core 7, and the second diversion hole 512 can timely guide the medium into the second medium channel to discharge the medium into the pressure preparation cavity 14.
Under the power-on state, the fixed iron core 7 adsorbs the movable iron core 6 and drives the valve rod 5 to move downwards, so that the first medium channel is opened, the second medium channel is closed, and the medium on the medium pipeline connected with the port B enters from the port B and flows out from the port A, thereby changing the inlet direction of the medium. When the power is cut off again, the movable iron core 6 is bounced back to the original position by the spring, the first medium channel is closed, and the second medium channel is opened, so that the advancing direction of the medium can be controlled by turning on and off the power.
Claims (7)
1. The electric valve is characterized by comprising an electric actuator cavity (1) and a valve cavity (2) for medium to flow through, wherein the electric actuator cavity (1) and the valve cavity (2) are separated by a magnetic conduction plate (9) with a sealing gasket (91) arranged at the bottom, at least one medium inlet (21) and at least one medium outlet (22) are arranged on the valve cavity (2), a valve seat (3) is arranged between the medium inlet (21) and the medium outlet (22), and a valve head (4) in sealing fit with the valve seat (3) is arranged on the valve seat;
an electromagnetic coil (8) is arranged in the electric actuator cavity (1), a movable iron core (6) and a fixed iron core (7) are coaxially arranged in an inner cavity of the electromagnetic coil (8), a spring (10) is arranged between the movable iron core (6) and the fixed iron core (7), the movable iron core (6) is fixed on a valve rod (5), the movable iron core (6) is positioned in a sealed back pressure cavity (14), the valve rod (5) penetrates through a magnetic conduction plate (9) to be fixedly connected with the valve head (4), and a flow guide channel (51) which is communicated with the valve cavity (2) and the back pressure cavity (14) is arranged on the valve rod (5);
a valve rod inner hole (513) penetrating through the valve rod (5) along the axial direction of the valve rod is arranged on the valve rod (5), a first diversion hole (511) penetrating through the side wall of the valve rod is arranged at one end, adjacent to the valve head (4), of the valve rod (5), a second diversion hole (512) penetrating through the side wall of the valve rod is arranged on the valve rod (5) in the back pressure cavity (14), and the first diversion hole (511), the second diversion hole (512) and the valve rod inner hole (513) form the diversion channel (51);
the movable iron core (7) is provided with a conical boss (71) towards one end of the fixed iron core (6), the fixed iron core (6) is provided with a conical concave hole (61) corresponding to the conical boss (71) towards one end of the movable iron core (7), and the spring (10) is located in the conical concave hole (61).
2. An electrically operated valve according to claim 1, characterised in that a buffer (11) is provided on top of the valve stem (5).
3. The electric valve according to claim 2, characterized in that the electric actuator cavity (1) is surrounded by a magnetically conductive cylinder (12) and the magnetically conductive plate (9).
4. A valve according to claim 3, wherein the fixed iron core (7) is fixed on the top surface of the magnetic conductive cylinder (12), a guide hole (72) for the valve rod (5) to move along the axial direction is arranged in the fixed iron core (7), and the movable iron core (6) is positioned below the fixed iron core (7).
5. An electrically operated valve as claimed in claim 3, characterised in that said magnetic cylinder (12) is provided with a plug (13), said electromagnetic coil (8) being electrically connected to said plug (13) in parallel with a diode.
6. An electrically operated valve as claimed in claim 1, characterised in that said valve head (4) is in sealing engagement with a valve seat (3) by means of a conical surface, both ends of said valve seat (3) being provided with conical surfaces which are capable of sealing engagement with said valve head (4).
7. The electric valve according to claim 1, characterized in that a plurality of mounting lugs (23) are integrally formed on a housing forming the valve cavity (2), a plurality of the mounting lugs (23) are symmetrically arranged on the housing, mounting holes (231) are formed in the mounting lugs (23), and metal rings (232) are embedded in the mounting holes (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540878.9A CN109340403B (en) | 2018-12-17 | 2018-12-17 | Electric valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540878.9A CN109340403B (en) | 2018-12-17 | 2018-12-17 | Electric valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109340403A CN109340403A (en) | 2019-02-15 |
| CN109340403B true CN109340403B (en) | 2023-10-20 |
Family
ID=65304631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811540878.9A Active CN109340403B (en) | 2018-12-17 | 2018-12-17 | Electric valve |
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| CN112413136B (en) * | 2020-10-15 | 2021-06-25 | 深圳市安保科技有限公司 | Proportional flow valve |
| CN214093242U (en) * | 2020-11-24 | 2021-08-31 | 浙江三花汽车零部件有限公司 | Electromagnetic valve |
| CN114526342B (en) * | 2022-01-13 | 2023-09-08 | 中科首望无水染色智能装备(苏州)有限公司 | Long-range electromagnetic sealing flash explosion device and working method |
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| US9328840B2 (en) * | 2011-07-14 | 2016-05-03 | Koganei Corporation | Solenoid valve |
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| US5967488A (en) * | 1998-05-29 | 1999-10-19 | Redlich; Robert Walter | Electrically actuated reed valve |
| CN201218333Y (en) * | 2008-06-13 | 2009-04-08 | 倪国庆 | Electromagnetic valve |
| CN103672109A (en) * | 2012-09-26 | 2014-03-26 | 浙江三花汽车零部件有限公司 | Normally open solenoid valve |
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