CN120926303A

CN120926303A - Hollow piston type low flow resistance self-balancing electromagnetic valve

Info

Publication number: CN120926303A
Application number: CN202511113336.3A
Authority: CN
Inventors: 俞振寰; 沈磊; 黄春生
Original assignee: Zhejiang Liming Zhizao Co ltd; Ji'an Electric Control Technology Zhoushan Co ltd
Current assignee: Zhejiang Liming Zhizao Co ltd; Ji'an Electric Control Technology Zhoushan Co ltd
Priority date: 2025-08-08
Filing date: 2025-08-08
Publication date: 2025-11-11

Abstract

This invention discloses a hollow piston-type low-flow-resistance self-balancing solenoid valve, relating to the field of solenoid valve technology. The hollow piston-type low-flow-resistance self-balancing solenoid valve includes a valve body with a piston passage within it. An inlet and an outlet, communicating with the piston passage, are located on the side wall of the valve body. An electromagnetically controlled piston is slidably connected within the piston passage, with both ends of the piston penetrating through it. The piston controls the opening or closing of the outlet. In this invention, the sliding piston separates different inlet and outlet areas through a dynamic seal. The fluid pressure at both ends of the piston is almost identical, thus ensuring that the force on the valve core is only related to the spring force and electromagnetic force, and has little or no influence from the working medium pressure.

Description

Hollow piston type low flow resistance self-balancing electromagnetic valve

Technical Field

The invention relates to the technical field of electromagnetic valves, in particular to a hollow piston type low-flow-resistance self-balancing electromagnetic valve.

Background

Solenoid valves are industrial equipment that are solenoid controlled and are the automated basic components used to control fluids. When the solenoid valve is used for controlling the oil passage, oil can pass through the valve body to the control oil passage when the solenoid valve is not electrified. When the valve is electrified, the solenoid valve plunger moves the valve core to close the oil through hole of the valve body, so that oil cannot reach the control oil path. In the prior art, the solenoid valve controls the valve port to be opened and closed through the movement of the solid valve core, but the design brings larger flow resistance, and when fluid flows through the valve core, the valve core is stressed unevenly due to large contact area, and the control of the valve core is inaccurate and unstable.

Disclosure of Invention

The invention aims to solve the problem of large flow resistance caused by solid three-way valves in the prior art, and provides a hollow piston type low-flow resistance self-balancing electromagnetic valve.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the hollow piston type low flow resistance self-balancing electromagnetic valve comprises a valve body, wherein a piston channel is arranged in the valve body, and an inlet and an outlet which are communicated with the piston channel are arranged on the side wall or the end face of the valve body;

The piston is in sliding connection with a piston controlled by electromagnetic waves, the piston is of a hollow structure with two ends penetrating, a through fluid channel is formed inside the piston, and the opening or closing of the outlet is controlled by the piston.

Preferably, the number of outlets is one.

Preferably, the number of the outlets is two, and the outlets are respectively an outlet A and an outlet B;

the side wall of the piston controls the opening or closing of the outlet A and the outlet B.

Preferably, an electromagnetic driving assembly is further arranged in the valve body;

And the valve body is also provided with a shell for installing the electromagnetic driving assembly.

Preferably, the piston is connected with the movable iron core through a push rod and a push rod seat, and the piston moves linearly along with the movable iron core;

the push rod seat is arranged on the piston, and the push rod is connected between the push rod seat and the movable iron core.

Preferably, a sealing seat is further arranged in the valve body, and the sealing seat is arranged at the opening of the shell.

Preferably, a piston seat is further provided in the valve body to restrain the piston.

Preferably, a spring for restoring the piston is further arranged in the valve body, the spring is sleeved on the outer wall of the piston, and two ends of the spring are respectively connected with the piston seat and the inner wall of the valve body;

When the number of the outlets is one, the position of the piston is adjusted through the initial position of the spring, and the outlets are controlled to be in a normally open state or a normally closed state;

in the working state of the piston, the two ends are subjected to the same fluid pressure, and the electromagnetic driving force overcomes the spring force and the friction force.

Preferably, the inlet is located between the outlet a and the outlet B, the outlet a is located above the outlet B, and the inner bottom of the outlet B is flush with the piston gallery bottom.

Preferably, a sensor groove is formed in the side wall of the valve body, a sensor is installed in the sensor groove, a sensor cover is installed at the notch of the sensor groove, a sensor ring is arranged in the valve body, and the sensor ring is fixed on the outer wall of the piston.

Preferably, a bracket for mounting the housing is mounted on the valve body.

Preferably, the inlet is located at the lowest of the outlets a and B, and the outlet a is located above the outlet B.

Compared with the prior art, the invention has the beneficial effects that:

According to the invention, the sliding piston separates different inlet and outlet areas through dynamic seal, and the two ends of the piston are almost the same under the fluid pressure, so that the valve core stress is only related to the spring force and the electromagnetic force, and is irrelevant to the working medium pressure or has less influence.

The valve core is irrelevant to working pressure, so that the electromagnetic force requirement on the electromagnetic valve is small, and the cost, the volume and the application range are greatly improved.

In addition, in a preferred structure of the present invention, the solenoid valve may be a three-way solenoid valve or a two-way solenoid valve, except that the number of effective outlets is different.

When the structure is a three-way electromagnetic valve, the opening or closing of any one of the two outlets is controlled through the through type piston structure, so that the on-off or split function between the inlet and the outlet is formed.

The structure can also be adapted to a two-way electromagnetic valve, namely, one outlet is closed or cancelled, so that the piston only controls the opening and closing of one outlet, thereby forming a normally open or normally closed structure, being applicable to wider on-off control requirements of a cooling system, and in addition, the two-way electromagnetic valve can form a normally open or normally closed working mode by changing the setting position of a spring and the electromagnetic driving direction, so that the flexibility of an adaptation scene is enhanced.

The piston structure of the three-way or two-way valve is provided with an internal channel through design, the stress at two ends is approximately balanced, the requirement on electromagnetic force is obviously reduced, and the three-way valve has the characteristics of small flow resistance, quick response, compact structure and the like, and is suitable for being arranged in an integrated liquid cooling system.

In addition, the driving force is the same driving force, namely an electromagnetic driving assembly, under the switching of the two-way electromagnetic valve and the three-way electromagnetic valve, and the shape composition and the movement mode of the piston are not changed, namely a dynamic sealing scheme of the piston is adopted, so that the pressures at two sides of the piston are almost the same. The valve core stress is only related to the spring force and the electromagnetic force, and is irrelevant to the working pressure of the electromagnetic valve or has small influence.

In summary, the two-way electromagnetic valve and the three-way electromagnetic valve are different in number or communication state of the outlets, and the other two-way electromagnetic valve and the three-way electromagnetic valve are designed by adopting the same technology in driving force, dynamic sealing structure of the piston and the like, so that the universality of the two-way electromagnetic valve and the three-way electromagnetic valve is reflected.

Drawings

FIG. 1 is a diagram showing a state of a coil energized in a first embodiment of a hollow piston type low flow resistance self-balancing solenoid valve according to the present invention;

FIG. 2 is a diagram showing a state of a coil not energized in a first embodiment of a hollow piston type low flow resistance self-balancing solenoid valve according to the present invention;

FIG. 3 is a diagram showing a coil in a second embodiment of a hollow piston type low flow resistance self-balancing solenoid valve according to the present invention;

Fig. 4 is a diagram showing a second coil energized state of the hollow piston type low flow resistance self-balancing solenoid valve according to the embodiment of the present invention.

1, A shell, 2, a static iron core, 3, a coil, 4, a bracket, 5, a sensor cover, 6, a sensor, 7, a sensor ring, 8, a valve body, 80, a piston channel, 81, an inlet, 82, an outlet A, 83, an outlet B, 9, a movable iron core, 10, a push rod, 11, a sealing seat, 12, a push rod seat, 13, a piston seat, 14, a piston, 15 and a spring.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.

1-2, The hollow piston type low flow resistance self-balancing electromagnetic valve comprises a valve body 8, wherein a piston channel 80 is arranged in the valve body 8, and the piston channel 80 is of a flow channel structure vertically arranged in the valve body 8.

In addition, in this embodiment, the electromagnetic valve is a three-way valve, and further, an inlet 81, an outlet a82, and an outlet B83 that are in communication with the piston channel 80 are provided on a side wall or an end surface of the valve body 8, wherein the piston channel 80 is in communication with the inlet 81, the outlet a82, and the outlet B83, the aforementioned ports are provided on the side wall of the valve body 8, and the present embodiment also protects the structure that the aforementioned ports are provided on the end surface of the valve body 8, that is, the inlet 81, the outlet a82, and the outlet B83 are provided at an end of the valve body 8, which is not shown in the figure.

Still further, a piston 14 is slidably connected to the piston channel 80 through electromagnetic control, wherein the piston 14 has a hollow structure with two ends penetrating, and a penetrating fluid channel is formed inside, in this embodiment, a water inlet aligned with the inlet 81 is provided on a side wall of the piston 14, and the water inlet is communicated with an inner wall of the piston 14.

Further, referring to fig. 1-2, a specific driving structure of the electromagnetic control is set as follows:

An electromagnetic driving assembly is further arranged in the valve body 8 and comprises a static iron core 2, a movable iron core 9 and a coil 3. In this embodiment, the stationary core 2 and the movable core 9 are both disposed in the coil 3.

In addition, the piston 14 and the movable iron core 9 may be connected through a push rod 10, a push rod seat 12 or other transmission structures, and all the modes such as buckling, interference, threading or welding may be adopted, so that the piston 14 follows the movable iron core 9 to perform linear motion, preferably, the push rod seat 12 is disposed on the piston 14, and the push rod 10 is connected between the push rod seat 12 and the movable iron core 9. Preferably, the push rod seat 12 is composed of a rod portion and a base, wherein the base is fixed in the hollow piston 14, and an overflow port is arranged on the base, so that the base is prevented from closing an inner flow port of the piston 14, and the rod portion is fixed with the top of the base.

Referring to fig. 1-2, in this embodiment, a sealing seat 11 is further disposed in the valve body 8, and the sealing seat 11 is disposed at the opening of the housing 1, so as to ensure the tightness of the valve body 1. In this embodiment, the sealing seat 11 is disposed on the outer wall of the movable iron core 9, so as to ensure tightness during sliding between the sealing seat 11 and the movable iron core 9, and also ensure tightness at the opening of the valve body 8.

Referring to fig. 1-2, the valve body 8 is further provided with a housing 1 for mounting an electromagnetic drive assembly, wherein the housing 1 is provided outside the coil 3 for sealing the coil 3.

In addition, a piston seat 13 for restraining the piston 14 is further arranged in the valve body 8, wherein the piston seat 13 is embedded in a vertical flow passage of the valve body 8, and the outer wall of the piston 14 slides at the inner wall of the piston seat 13.

Still further, a spring 15 for restoring the piston 14 is further disposed in the valve body 8, specifically, the spring 15 is sleeved on the outer wall of the piston 14, two ends of the spring 15 are respectively connected with the piston seat 13 and the inner wall of the bottom of the valve body 8, and the setting of the spring 15 is used for restoring the piston 14 after movement.

In this embodiment, the inlet 81, the outlet A82 and the outlet B83 are arranged such that the inlet 81 is located between the outlet A82 and the outlet B83, the outlet A82 is located above the outlet B83, and the inner bottom of the outlet B83 is flush with the bottom of the piston gallery 80.

In addition, a sensor groove is formed in the side wall of the valve body 8, a sensor 6 is installed in the sensor groove, a sensor cover 5 is installed at the notch of the sensor groove, a sensor ring 7 is arranged in the valve body 8, and the sensor ring 7 is fixed on the outer wall of the piston 14.

Still further, a bracket 4 for mounting the housing 1 is mounted on the valve body 8.

Wherein, the movable iron core 9, the push rod 10, the push rod seat 12 and the piston 14 are connected into a whole by interference or buckling. The sensor ring 7 and the piston 14 are connected into a whole by interference or buckling.

In this embodiment, the opening or closing of the outlet a82 and the outlet B83 is controlled by the side wall of the piston 14, and the specific working procedure is as follows:

When the coil 3 is not energized, the spring 15 presses the piston 14 against the bottom and seals against the bottom of the valve body 1. The piston 14 is pushed into the bottom, and simultaneously pulls the plunger 9, the plunger 10, and the plunger seat 12, which are interference or pressed together, into the bottom. At this point the sensor ring 7 is in the bottom position and the sensor inputs signal P1. At this time, the inlet 81 and the outlet a82 are connected, and a specific flow path is shown in fig. 2. The flow passage in the piston 14 cannot pass through the bottom, thereby closing the outlet B83.

When the coil is energized, referring to fig. 1, the coil generates electromagnetic force to move the plunger 9 upward, the plunger 9 moves to drive the plunger 10, which is interference or clasped together, the plunger seat 12 and the piston 14 move upward, thereby opening the bottom while sealing the top. At this point the sensor ring 7 is in the top position and the sensor input signal P2. If PWM or variable current is input, the coil generates variable electromagnetic force, so that the movable iron core 9 moves proportionally, and the piston 14 is driven to move proportionally, so that variable openings of the piston at the top and the bottom are realized, and proportional distribution of the outlet A82 and the outlet B83 is realized. The sensor ring 7 is now moved between the top and bottom two positions, the sensor outputting a linear signal. At this time, the inlet 81 and the outlet B83 are connected. The flow passage in the piston 14 cannot pass through the top, thereby closing the outlet a 82. Or the flow passage in the piston 14 is moved by the piston to achieve proportional distribution of the flow rates of the outlet a82 and the outlet B83.

The second embodiment differs from the first embodiment in that, referring to fig. 3 and 4, the inlet 81 is located at the lowest of the outlet a82 and the outlet B83, and the outlet a82 is located above the outlet B83.

In addition, the side wall of the piston 14 is not provided with a water inlet in this embodiment.

Next, in this embodiment, the stationary core 2 is disposed in the sealing seat 11, and the top of the stationary core 2 is located in the coil 3, and the bottom is located below the movable core 9.

Finally, in this embodiment, two ends of the spring 15 are respectively connected with the piston seat 13 and the top inner wall of the valve body 8. In addition, the sensor cover 5, the sensor 6 and the sensor ring 7 are not provided.

1. When the coil 3 is not energized, the spring 15 pushes the piston 14 upward, moving the plunger 9 upward, opening the bottom while sealing the top. At this time, the flow passage in the piston 14 is connected to the outlet A82, and the specific flow passage is shown in FIG. 3. The flow passage in the piston 14 cannot pass through the top, thereby closing the outlet B83.

2. When the coil 3 is energized, the coil 3 generates electromagnetic force to move the plunger 9 downward as viewed in fig. 4, thereby opening the top while sealing the bottom. If PWM or variable current is input, the coil 3 generates variable electromagnetic force, so that the movable iron core 9 moves proportionally, and the piston 14 is driven to move proportionally, so that variable openings of the piston at the top and the bottom are realized, and proportional distribution of the outlet A82 and the outlet B83 is realized. At this time, the flow passage in the piston 14 is connected to the outlet B83, and the specific flow passage is shown in fig. 4. The flow passage in the piston 14 cannot pass through the bottom, thereby closing the outlet a 82. Or the flow passage in the piston 14 is moved by the piston to achieve proportional distribution of the flow rates of the outlet a82 and the outlet B83.

In the third embodiment, the number of outlets is different from that of the first and second embodiments, and the number of outlets in the third embodiment is one, and based on the structure of the first or second embodiment, the hollow piston type low-flow-resistance self-balancing electromagnetic valve can also seal one of the outlets to form a two-way electromagnetic valve structure. Preferably, the outlet is the outlet B83, that is, the electromagnetic valve in this embodiment is a two-way valve, specifically, referring to the outlet a82 on the right side in fig. 1-4, the structure of the valve body 8 and the driving piston 14 is the same as that of the first embodiment, wherein the side wall of the piston 14 does not include an inlet, and the side wall is a cylinder structure penetrating up and down.

In the embodiment, the valve body keeps an inlet and an outlet, the movement of the piston controls the on-off state, and electromagnetic force is used for driving the piston to overcome spring force to generate switching on-off, so that a normally closed or normally open control mode is formed. The two-way electromagnetic valve can be widely applied to functional modules such as a cooling liquid distribution branch, a cooling loop switch control and the like, and has the advantages of low cost, low power consumption, reliable on-off and the like.

In this embodiment, the solenoid valve works by pressing the piston 14 to the bottom by the spring 15 when the coil 3 is not energized, and sealing the bottom of the valve body 1, i.e. the piston 14 blocks the water outlet end of the inlet 81, thereby achieving shut-off. When the coil is electrified, the coil generates electromagnetic force to move the movable iron core 9 upwards, the movable iron core 9 moves to drive the push rod 10 which is in interference or buckling with the movable iron core, the push rod seat 12 and the piston 14 move upwards, and at the moment, the inlet (81) and the outlet A are both opened and are in a communicating state, so that the circulation of an inner flow path of the electromagnetic valve is realized.

The solenoid valve in the three embodiments is suitable for controlling the liquid flow of a cooling system, and is mainly applied to an engine, a battery or a transmission cooling liquid branch control system.

Finally, it should be noted that:

1. The first embodiment and the second embodiment are three-way electromagnetic valves, the third embodiment is a two-way electromagnetic valve, and the drawing in the invention is still applicable to a two-way electromagnetic valve structure. The two-way electromagnetic valve is a special case of a three-way structure, and can realize a normally-open or normally-closed mode by closing a certain outlet to form a two-way control effect.

2. The electromagnetic valve is suitable for a two-way or three-way structure, any outlet can be closed to form a normally open or normally closed two-way control mode, and the hollow piston structure and the internal channel thereof still keep effective functions. Furthermore, the electromagnetic valve structure provided by the invention has three-way/two-way compatibility, can realize wide applicability through outlet arrangement deformation, and is suitable for scenes such as branch switching, bypass regulation, loop control and the like in a cooling system.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present invention, and should be covered by the scope of the present invention.

Claims

1. A hollow piston type low flow resistance self-balancing solenoid valve, comprising a valve body (8), characterized in that a piston passage (80) is provided inside the valve body (8), and an inlet (81) and an outlet communicating with the piston passage (80) are provided on the side wall or end face of the valve body (8);

The piston channel (80) is slidably connected to an electromagnetically controlled piston (14). The piston (14) is a hollow structure with both ends through, forming a through fluid channel inside. The piston (14) controls the opening or closing of the outlet.

2. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 1, characterized in that the number of outlets is one.

3. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 1, characterized in that the number of outlets is two, and they are outlet A (82) and outlet B (83) respectively;

The sidewall of the piston (14) controls the opening or closing of outlet A (82) and outlet B (83).

4. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 1, characterized in that an electromagnetic drive assembly is further provided inside the valve body (8);

The valve body (8) is also provided with a housing (1) for mounting the electromagnetic drive assembly.

5. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 4, characterized in that the piston (14) is connected and driven by the push rod (10) and the push rod seat (12) on the electromagnetic drive assembly and performs linear motion;

The valve body (8) is also provided with a sealing seat (11), which is located at the opening of the outer shell (1).

6. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 1, characterized in that a piston seat (13) for constraining the piston (14) is further provided inside the valve body (8).

7. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 6, characterized in that a spring (15) for resetting the piston (14) is further provided inside the valve body (8), the spring (15) is sleeved on the outer wall of the piston (14), and the two ends of the spring (15) are respectively connected to the piston seat (13) and the inner wall of the valve body (8);

When the number of outlets is one, the position of the piston (14) is adjusted by the initial position set by the spring (15) to control the outlet to be in a normally open or normally closed state;

When the piston (14) is in operation, both ends are subjected to the same fluid pressure, and the electromagnetic driving force overcomes the spring force and friction.

8. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 3, characterized in that the inlet (81) is located between the outlet A (82) and the outlet B (83), the outlet A (82) is located above the outlet B (83), and the inner bottom of the outlet B (83) is flush with the bottom of the piston passage (80).

9. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 4, characterized in that a sensor groove is provided on the side wall of the valve body (8), a sensor (6) is installed in the sensor groove, a sensor cover (5) is installed at the opening of the sensor groove, a sensor ring (7) is provided in the valve body (8), and the sensor ring (7) is fixed to the outer wall of the piston (14).

The valve body (8) is provided with a bracket (4) for mounting the outer casing (1).

10. The hollow piston type low flow resistance self-balancing solenoid valve according to claim 3, characterized in that the inlet (81) is located at the lowest point of the outlet A (82) and outlet B (83), and the outlet A (82) is located above the outlet B (83).