Electromagnetic regulating valve

Abstract

The application discloses an electromagnetic regulating valve, which comprises a coil component, a magnetic isolation assembly arranged in the inside of the coil component and provided with a cavity in the inside, a valve seat installed on one side of the coil component, a first inlet flow channel and a first outlet flow channel arranged on the side wall of the valve seat, and a second inlet flow channel arranged on the end of the valve seat; a valve core assembly comprising a moving iron core and a valve core arranged in the inside of the moving iron core, the moving iron core being arranged in the inside cavity of the magnetic isolation assembly and axially movable, the valve core extending into the valve seat, and an elastic member arranged between the moving iron core and the valve seat; a balance flow channel arranged on the valve core and used for connecting the upper side and the lower side of the moving iron core; and an external controller electrically connected with the coil component and used for controlling the current size of the coil component. The application can be applied to a vehicle heat pump system, has a long service life, is not affected by the pressure difference of the medium inlet and outlet, and can accurately regulate the flow size.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic valve frame, in particular to a kind of electromagnetic regulating valve. BACKGROUND

[0002] The regulating valve can be used for the on-off control of pipeline medium, controls the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil, liquid metal and radioactive medium, and mainly plays the role of cutting off and throttling on the pipeline. Today, regulating valves gradually develop towards modularization, energy saving, intelligence and modernization. The existing use environment is generally in a high temperature state, and the regulating valve is required to be used in a high temperature environment for a long time. The structure is unstable and easy to damage, and cannot meet the long-term effective and stable flow control requirements. Once the valve core of the regulating valve is opened, there is no longer contact between the valve seat and the valve core sealing surface, so the mechanical wear of the sealing surface is small, the sealing performance is good, and the service life is long. The stop valve has simple structure, and is convenient to manufacture and maintain. However, the regulating valve has large inlet and outlet pressure difference, large fluid medium resistance, and large required force for opening and closing the valve. Moreover, the commonly used regulating valve is not suitable for vehicle heat pump system, is easy to be eroded, and has short service life. SUMMARY

[0003] The present application provides a kind of electromagnetic regulating valve, can be suitable for vehicle heat pump system, long service life, not affected by the size of the regulating flow of medium inlet and outlet pressure difference.

[0004] To achieve the above object, the present application provides the following technical scheme: a kind of electromagnetic regulating valve, including coil component;Magnetic isolation assembly is arranged in the inside of coil component, and the inside of magnetic isolation assembly is provided with cavity;Valve seat is installed on one side of coil component, the first inlet flow passage and the first outlet flow passage located on the side wall are provided on the valve seat, and the second inlet flow passage is provided on the end of valve seat;Valve core assembly includes moving iron core and valve core arranged in the inside of moving iron core, the inside cavity of magnetic isolation assembly is arranged in the inside cavity of magnetic isolation assembly, the valve core is inserted into the valve seat, and the elastic member is arranged between the moving iron core and the valve seat;Balancing flow passage for communicating the upper side and the lower side of moving iron core is provided on the valve core;External controller, the external controller is electrically connected with coil component, and is used to control the current size of coil component.

[0005] As preferred, the magnetic isolation assembly includes an upper magnetic conductor, a lower magnetic conductor, and at least one magnetic ring stacked between the upper magnetic conductor and the lower magnetic conductor, and the top of the upper magnetic conductor is provided with a head plate.

[0006] As preferred, the coil component includes a coil assembly and a yoke, the coil assembly is located in the yoke, and the upper end of the coil assembly is provided with a pressing plate connected with the yoke.

[0007] As preferred, the coil assembly comprises a PIN needle, a coil skeleton, a coil arranged outside the coil skeleton, and a coil encapsulating body arranged outside the coil.

[0008] As preferred, the upper part of the PIN needle is exposed outside the upper side of the coil skeleton, and the lower part of the PIN needle is arranged inside the coil skeleton, and a bending part is arranged between the upper part and the lower part of the PIN needle.

[0009] As preferred, the upper part of the PIN needle is provided with a fish-eye perforation.

[0010] As preferred, the lower end of the moving iron core is provided with a conical inner groove, and the upper end of the elastic member is embedded into the conical inner groove.

[0011] As preferred, the outer side wall of the valve seat is provided with a first O-shaped sealing ring between the first inlet flow channel and the first outlet flow channel, and is provided with a second O-shaped sealing ring between the first outlet flow channel and the second inlet flow channel.

[0012] As preferred, the balance flow channel comprises a balance axial hole arranged at the center of the valve core and a plurality of balance radial holes arranged around the balance axial hole, one end of the balance axial hole extends to the upper end of the valve core, one end of the balance radial hole is communicated with the balance axial hole, and the other end of the balance radial hole extends to the outer side wall of the valve core.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] The whole structure is of the normally open type, and no sealing surface exists, so that the service life and durability of the sealing structure do not need to be worried about; the special double-inlet design, and the equal cross-sectional areas of the two inlets, make the pressure above and below the valve body equal, and the balance flow channel on the valve core can reduce the electromagnetic force required when the valve is opened and closed, and reduce the energy consumption; the magnetic isolation assembly design enhances the durability of the valve, reduces the magnetic resistance of the non-working air gap, reduces the required excitation magnetic potential, and reduces the cost; the fish-eye PIN needle is bent, the fish-eye PIN needle cancels the welding process, can effectively reduce the cost, improve the product quality and be green and environmentally friendly, compared with the traditional PIN needle soldering, has the characteristics of long service life and high strength (reliable electrical contact surface), and has certain universal interchangeability; the PIN needle is designed to be bent, can play a buffering role when the PCB board vibrates or is impacted, self-adjusts, self-adapts, and is convenient for stress release; the structure has high integration, few parts, and is more convenient to assemble, is conducive to light weight, and has more cost advantages. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1Fig. 1 is an overall exploded state structural diagram of the present application;

[0016] Figure 2 Fig. 2 is a perspective structural diagram of a coil component of the present application;

[0017] Figure 3 Fig. 3 is an exploded state perspective structural diagram of the coil component of the present application;

[0018] Figure 4 Fig. 4 is a perspective structural diagram of a magnetic isolation assembly of the present application;

[0019] Figure 5 Fig. 5 is a sectional structural diagram of the magnetic isolation assembly of the present application;

[0020] Figure 6 Fig. 6 is a sectional structural diagram of a valve core assembly of the present application;

[0021] Figure 7 Fig. 7 is an overall half sectional structural diagram of the present application;

[0022] Figure 8 Fig. 8 is a sectional schematic diagram of the electromagnetic regulating valve of the present application before starting operation;

[0023] Figure 9 Fig. 9 is a sectional schematic diagram of the electromagnetic regulating valve of the present application at the beginning of operation.

[0024] Reference signs:

[0025] 1, coil component; 11, coil assembly; 12, yoke; 13, pressing plate; 2, magnetic isolation assembly; 21, end plate; 22, upper magnetic conductor; 23, magnetic separation ring; 24, lower magnetic conductor; 24A, guide section; 3, valve core assembly; 31, moving iron core; 31A, conical inner groove; 32, elastic member; 33, valve core; 34, balance flow channel; 4, valve seat; 5a, first O-shaped sealing ring; 5b, second O-shaped sealing ring; IP1, first inlet flow channel; IP2, second inlet flow channel; OP, first outlet flow channel; 111, PIN pin; 112, coil framework; 113, coil; 114, coil encapsulating body; 1121, fixed support. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0027] As Figures 1-9As shown, the scheme of the present application is to solve the problems of the existing regulating valve sealing structure, such as complex, high energy consumption, and many parts, and provides the following technical scheme: an electromagnetic regulating valve, comprising a coil component 1; a magnetic isolation assembly 2 is arranged in the inside of the coil component 1, and the inside of the magnetic isolation assembly 2 is provided with a cavity; a valve seat 4 is installed on one side of the coil component 1, and the valve seat 4 is provided with a first inlet flow channel IP1 and a first outlet flow channel OP on the side wall, and a second inlet flow channel IP2 is arranged at the end of the valve seat 4; a valve core assembly 3, comprising a moving iron core 31 and a valve core 33 arranged in the inside of the moving iron core 31, the moving iron core 31 is arranged in the inside cavity of the magnetic isolation assembly 2 and axially movable, the valve core 33 extends into the valve seat 4, and the moving iron core 31 is provided with an elastic member 32 between the moving iron core 31 and the valve seat 4; the valve core 33 is provided with a balance flow channel 34 for communicating the upper side and the lower side of the moving iron core 31; an external controller, the external controller is electrically connected with the coil component 1, and is used for controlling the current size of the coil component 1.

[0028] Specifically, the external controller controls the size of the electromagnetic force by controlling the current size through the coil component 1, controls the opening of the valve port by using the balance of the electromagnetic force and the spring force, and further controls the size of the flow, the opening control is without screw thread transmission and other mechanical mechanisms, and there is no mechanical noise.

[0029] At present, most of the driving structures of the moving iron type regulating valve are directly matched with the coil assembly, and this driving mode will cause: 1. The wear resistance of the injection molding material is poor, and after the life test, the coil assembly hole becomes larger, the gap becomes larger, the guiding property becomes poor, etc., which causes the electromagnetic force to attenuate; 2. The injection molding material debris caused by friction will accumulate in the hole, causing jamming or failure. In the embodiment, the magnetic isolation assembly 2 separates the moving iron core 31 from the coil component 1, so that the moving iron core 31 cannot directly contact the coil component 1, ensures that the magnetic isolation assembly 2 and the moving iron core 31 have similar roughness and physical and chemical properties, thereby ensuring that they have similar wear resistance, reducing sample damage caused by wear, and reducing the magnetic resistance of the non-working air gap, reducing the required excitation magnetic potential, and reducing the cost.

[0030] The balance flow channel 34 enables the fluid flowing from the first inlet flow channel IP1 and the second inlet flow channel IP2 to enter the cavity between the upper side of the moving iron core 31 and the magnetic isolation assembly 2, so as to balance the pressure and reduce the resistance when the switch valve is opened.

[0031] In this embodiment, the magnetic isolation assembly 2 includes an upper magnetic conductor 22, a lower magnetic conductor 24, and at least one magnetic ring 23 stacked between the upper magnetic conductor 22 and the lower magnetic conductor 24. The top of the upper magnetic conductor 22 is provided with a capping plate 21, preferably made of stainless steel, for sealing the valve cavity. The upper magnetic conductor 22 and the lower magnetic conductor 24 are made of materials with high magnetic permeability to ensure the high performance requirements of the valve. The upper magnetic conductor 22 and the lower magnetic conductor 24 form a magnetic circuit with the coil assembly 11 and the moving iron core 31 in the coil component 1. The magnetic ring 23 is made of magnetic isolation material, preferably copper alloy, which is easy to process, easy to weld, and has strong corrosion resistance. To ensure the high performance requirements of the valve, the coaxiality of the magnetic isolation assembly 2 is required to be high. The capping plate 21, the upper magnetic conductor 22, the magnetic ring 23, and the lower magnetic conductor 24 are press-fitted together to prevent thermal stress generated during laser welding from causing off-axis deviation. Therefore, high requirements are placed on the flatness of each assembly mating surface. Figure 5 As shown in the figure, points a, b, and c are the laser welding points. The shoulder of the part corresponding to the welding point needs to be cleared.

[0032] In this embodiment, as Figures 2-3 As shown, the coil component 1 includes a coil assembly 11 and a yoke 12. The coil assembly 11 is located inside the yoke 12. The upper end of the coil assembly 11 is provided with a pressure plate 13 connected to the yoke 12. Specifically, the yoke 12 and the pressure plate 13 are made of cold-rolled steel plates to enclose the magnetic lines of force generated by the coil inside, thereby improving the efficiency of the electromagnet and enhancing the attraction force of the electromagnetic coil. The pressure plate 13 and the yoke 12 are press-fitted together to fix the coil assembly 11 in the corresponding position.

[0033] The coil assembly 11 includes a PIN pin 111, a coil frame 112, a coil 113 disposed outside the coil frame 112, and a coil sheath 114 wrapped around the coil 113. The PIN pin 111 is disposed at the upper end of the coil frame 112. A fixing bracket 1121 passing through the pressure plate 13 is also disposed on the upper side of the coil frame 112. The fixing bracket 1121 is used to fix the entire coil assembly 1. The rigid fixing bracket 1121 can also be replaced by a flexible spring pressure plate for fixing the coil assembly 1, or the spring pressure plate can be used to assist in fixing. One end of the PIN pin 111 is connected to an external connector to realize the electrical connection between the coil and the external signal, and the other end is connected to the coil 113. The tail end of the PIN pin has an irregular structure to facilitate the fixed connection with the coil 113. The coil frame 112 is an injection molded part, which is injection molded from plastic material.

[0034] The upper part of the PIN needle 111 is exposed on the upper side of the coil framework 112, the lower part of the PIN needle 111 is located inside the coil framework 112, and a bending part is arranged between the upper part and the lower part of the PIN needle 111. The bending part can play a buffering role when the PCB board vibrates or is impacted, and can be self-adjusted, self-adapted, and facilitate stress release. Specifically, the upper part of the PIN needle 111 is provided with a fish-eye perforation. The fish-eye perforation cancels the welding process of the conductive connection of the PIN needle 111, can effectively reduce the cost, improve the product quality and be green and environmentally friendly, has the characteristics of good service life, high strength and reliable electrical contact surface compared with traditional PIN needle soldering, and has certain universal interchangeability.

[0035] In the embodiment, as shown in Figure 6 The lower end of the moving iron core 31 is provided with a conical inner groove 31A, and the upper end of the elastic member 32 is embedded into the conical inner groove 31A. The taper angle of the conical inner groove 31A has a magnetic convergence effect, and can also limit the elastic member 32.

[0036] In the embodiment, the outer side wall of the valve seat 4 is provided with a first O-shaped sealing ring 5a between the first inlet flow channel IP1 and the first outlet flow channel OP, and is provided with a second O-shaped sealing ring 5b between the first outlet flow channel OP and the second inlet flow channel IP2. The first O-shaped sealing ring 5a and the second O-shaped sealing ring 5b are preferably inner leakage O-shaped rings, and the material is preferably EPDM, which needs to meet the requirements of normal physical properties, compression permanent deformation, low temperature brittleness, liquid resistance and hot air aging performance.

[0037] As a preferred structure of the balance flow channel 34, the balance flow channel 34 includes a balance axial hole in the center of the valve core 33 and a plurality of balance radial holes arranged around the balance axial hole. One end of the balance axial hole extends to the upper end of the valve core 33, and one end of the balance radial hole communicates with the balance axial hole, and the other end of the balance radial hole extends to the outer side wall of the valve core 33. Such a structure allows fluid to quickly enter the balance axial hole from the balance radial hole.

[0038] When assembling, as Figure 7As shown, the upper magnetic conductor 22, the magnetic shunt ring 23 and the lower magnetic conductor 24 are tightly fitted and pressed and assembled and then welded together, the ring welding position is at b and c; the moving iron core 31 and the valve core 33 are tightly fitted and pressed and assembled and then put into the magnetic isolation assembly 2, the head 21 is tightly fitted and pressed and assembled with the upper magnetic conductor 22 and then welded, the ring welding position is at a; the elastic member 32 is sleeved on the valve core 31 and assembled into the lower end conical inner recess 31A of the moving iron core 31, the guiding section 24A of the lower magnetic conductor 24 plays the role of guiding and limiting the spring; the valve seat 4 is connected with the magnetic isolation assembly 2 by tightly fitting and then welding, the ring welding position is at d. The interference press fitting sections all have a chamfer of 30°, which is used for guiding and correcting in the process of part assembly; the valve core assembly 3 moves up and down in the cavity in the axial direction. The coil component 1 is connected with the outside through the fixed support 1121, the valve body is connected with the outside boundary through the riveting and pressing of the features at 4C, and the overall sealing effect is achieved through the hard sealing.

[0039] As shown in the figure, Figure 8 Before the electromagnetic regulating valve starts to work, the coil assembly 11 is not electrified, at this time, there is no current passing through the coil, no magnetic field is generated, no electromagnetic force, and the valve core assembly 3 does not move. The flow passage cross-sectional area S1 of the first inlet flow passage IP1 and the flow passage cross-sectional area S2 of the second inlet flow passage IP2 are equal, and the pressure of the upper and lower cavities of the valve core is the same, the pressure difference is zero, and the valve core is not subjected to fluid pressure. At this time, the force of the elastic member 32 of the valve core of the valve core assembly is greater than the downward gravity of the valve core assembly 3, and the valve core assembly 3 is pushed up. The fluid passes through the balance flow passage 34 on the valve core 33 and enters the cavity composed of the upper end of the valve core 33 and the head 21, balances the pressure, and reduces the resistance when the switch valve is opened.

[0040] As shown in the figure, Figure 9 The electromagnetic regulating valve starts to work, the coil assembly 11 is electrified, a magnetic field is formed, a magnetic field force is generated, the valve core assembly 3 is attracted, the valve core assembly 3 moves downward, at this time, the magnetic field force is greater than the spring force generated by the valve core spring 32, the valve core spring 32 is compressed, the flow passage cross-sectional areas S1 and S2 change, and the flow changes. During the change of the flow passage cross-sectional areas S1 and S2, S1 is always equal to S2. As the elastic member 32 is compressed, the spring force gradually increases, and when the spring force increases to the sum of the magnetic field force and the gravity of the valve core assembly, the valve core assembly 3 stops moving and remains stable. The size of the current in the coil is controlled by the external signal to change the magnetic field force, control the valve core position, and then control the valve port opening degree. When the electromagnetic regulating valve stops working, the coil assembly 11 stops being electrified, no magnetic field is generated, and no magnetic field force, the valve core assembly 3 moves upward under the action of the elastic member 32, and the upper plane of the moving iron core 31 contacts the lower plane of the head 21.

[0041] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications will also change accordingly.

[0042] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically defined.

[0043] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

Claims

1. An electromagnetic regulating valve characterized by comprising: The utility model relates to a solenoid valve, which comprises: a coil component (1); a magnetic isolation assembly (2) arranged inside the coil component (1) and provided with a cavity inside; a valve seat (4) mounted on one side of the coil component (1), wherein the valve seat (4) is provided with a first inlet flow channel (IP1) and a first outlet flow channel (OP) on the side wall, and a second inlet flow channel (IP2) is arranged at the end of the valve seat (4), and the cross-sectional areas S1 and S2 of the first inlet flow channel (IP1) and the second inlet flow channel (IP2) are equal; a valve core assembly (3) comprising a moving iron core (31) and a valve core (33) arranged inside the moving iron core (31), wherein the moving iron core (31) is arranged to axially move in the cavity of the magnetic isolation assembly (2), the valve core (33) extends into the valve seat (4), and an elastic member (32) is arranged between the moving iron core (31) and the valve seat (4); the valve core (33) is provided with a balance flow channel (34) for connecting the upper side and the lower side of the moving iron core (31); an external controller electrically connected to the coil component (1) for controlling the current of the coil component (1); a first O-shaped sealing ring (5a) is arranged between the first inlet flow channel (IP1) and the first outlet flow channel (OP) on the outer side wall of the valve seat (4), and a second O-shaped sealing ring (5b) is arranged between the first outlet flow channel (OP) and the second inlet flow channel (IP2).

2. The electromagnetic control valve according to claim 1, characterized by: The magnetic isolation assembly (2) comprises an upper magnetic conductor (22), a lower magnetic conductor (24), and at least one magnetic ring (23) arranged between the upper magnetic conductor (22) and the lower magnetic conductor (24), and the top of the upper magnetic conductor (22) is provided with a head plate (21).

3. The electromagnetic control valve according to claim 1, characterized by: The coil component (1) comprises a coil assembly (11) and a yoke (12), the coil assembly (11) is arranged in the yoke (12), and the upper end of the coil assembly (11) is provided with a pressing plate (13) connected to the yoke (12).

4. The electromagnetic regulating valve according to claim 3, characterized in that: The coil assembly (11) comprises a PIN pin (111), a coil framework (112), a coil (113) arranged on the outer side of the coil framework (112), and a coil rubber (114) wrapped on the outer side of the coil (113), the PIN pin (111) is arranged at the upper end of the coil framework (112), and the upper side of the coil framework (112) is further provided with a fixed support (1121) penetrating through the pressing plate (13).

5. The electromagnetic regulating valve according to claim 4, characterized in that: The upper part of the PIN pin (111) is exposed on the upper side of the coil framework (112), the lower part of the PIN pin (111) is arranged inside the coil framework (112), and a bending part is arranged between the upper part and the lower part of the PIN pin (111).

6. The electromagnetic regulator valve according to claim 5, characterized in that: The upper part of the PIN pin (111) is provided with a fish-eye perforation.

7. The electromagnetic regulator valve according to claim 1, characterized in that: The lower end of the moving iron core (31) is provided with a conical inner groove (31A), and the upper end of the elastic member (32) is embedded into the conical inner groove (31A).

8. The electromagnetic regulator valve according to claim 1, characterized in that: The balance flow channel (34) comprises a balance axial hole in the center of the valve core (33) and several balance radial holes arranged around the balance axial hole, one end of the balance axial hole extends to the upper end of the valve core (33), one end of the balance radial hole communicates with the balance axial hole, and the other end extends to the outer side wall of the valve core (33).

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