Three-way electromagnetic valve

Abstract

The utility model provides a three-way electromagnetic valve which comprises an upper shell, a lower shell, a coil assembly, a valve element assembly, a sealing seat and a first reset spring, the coil assembly is arranged in the upper shell and the lower shell, an open hole is formed in a coil framework, and a spring guide column of the upper shell and a valve element seat of the lower shell are inserted into the open hole from the two ends; an air inlet hole is formed in the spring guide column in the axial direction, the valve element assembly is arranged in an inner hole of the valve element seat and can move in the axial direction, and the spring guide column is sleeved with the first reset spring which is elastically supported between the coil framework and the valve element assembly. A first air outlet hole is formed in the periphery of the valve core seat and is communicated with the air inlet hole through an airflow channel; the sealing seat is arranged at the bottom of the lower shell in a sealing mode, a second air outlet hole is formed in the middle of the sealing seat, a plurality of third air outlet holes are formed in the periphery of the sealing seat, on-off switching among the air inlet hole, the second air outlet hole and the third air outlet holes is achieved through power-on and power-off of the coil assembly, and therefore the three-way function is achieved, and on-off of the electromagnetic valve can be controlled only through small electromagnetic force.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a three-way solenoid valve which can be applied to a pilot circuit of an air intake system of a gas engine, and can also be applied to other pneumatic circuits which need to change the direction of airflow. Background Art

[0002] As an important control element, the three-way solenoid valve realizes flexible control of the flow direction of the medium by controlling the opening and closing of the valve by electric current. The pressure at the intake end of the gas engine needs to be controlled within a certain pressure range. At present, it is controlled by a gas pressure reducing valve, which adopts direct-acting control. When the high-pressure main circuit is working, the shut-off valve assembly needs greater power and electromagnetic force to open, and it is bulky and consumes high power. However, the existing ordinary three-way solenoid valve cannot meet the demand for airflow control at the intake end of the gas pressure reducing valve. Therefore, it is urgent to provide a new type of three-way solenoid valve that can not only meet the pressure control needs of the gas engine intake end, but also meet the application of other occasions. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to solve the shortcomings of the prior art such as large opening power electromagnetic force, bulky volume, high power consumption, etc., the utility model provides a three-way electromagnetic valve.

[0004] The technical solution to be adopted by the utility model to solve its technical problems is: a three-way solenoid valve, including an upper shell, a lower shell, a coil assembly, a valve core assembly, a sealing seat and a first return spring, wherein the upper shell and the lower shell are both hollow structures, and the open ends are engaged with each other, the coil assembly is arranged inside the upper shell and the lower shell, the coil assembly includes a coil and a coil skeleton, an opening is axially arranged inside the coil skeleton, a spring guide column is arranged inside the upper shell, a valve core seat is arranged inside the lower shell, the valve core seat is an annular sleeve structure, the spring guide column and the valve core seat are respectively inserted into the opening of the coil skeleton from upper and lower ends; an air inlet hole is axially arranged inside the spring guide column, the valve core assembly is arranged in the inner hole of the valve core seat, and can move axially in the valve core seat, the upper end of the valve core assembly is directly opposite to the air inlet hole of the spring guide column, and the air intake is controlled by the axial movement of the valve core assembly in the valve core seat. The hole is opened and closed; the upper end of the first return spring is sleeved on the spring guide column and the end portion abuts on the coil skeleton of the coil assembly, the lower end of the first return spring is connected to the spring fixing seat, and the spring fixing seat is fixedly sleeved on the upper end of the valve core assembly; a plurality of first air outlet holes are circumferentially arranged on the lower shell body outside the valve core seat, and the first air outlet hole and the air inlet hole are connected through the air flow channel arranged between the coil skeleton and the valve core seat; the sealing seat is sealed at the bottom of the lower shell body, and a first buffer cavity is formed between the sealing seat and the valve core seat, a second air outlet hole is provided in the middle part of the sealing seat, the second air outlet hole is directly opposite to the lower end of the valve core assembly, an annular column is provided at the upper end of the second air outlet hole, and the annular column can abut on the first sealing gasket at the lower end of the valve core assembly, a plurality of third air outlet holes are distributed circumferentially on the periphery of the second air outlet hole, and the first air outlet hole and the third air outlet hole are connected through the first buffer cavity.

[0005] Furthermore, in order to facilitate the on-off control of the solenoid valve, the air inlet hole is a two-stage stepped hole, the aperture decreases along the airflow direction, including a first stage aperture and a second stage aperture, and the second stage aperture is 1 / 4-2 / 3 of the first stage aperture. The diameter of the air inlet hole is relatively small, and even under high pressure, the force of the gas on the valve core is relatively small, so the solenoid valve only needs a small electromagnetic force to overcome the gas pressure and the reset spring force to realize the on and off of the solenoid valve.

[0006] Further, the valve core assembly includes an armature, a second return spring, a first sealing gasket and a second sealing gasket, a through hole is provided inside the armature, the second return spring is placed in the through hole, one end of the through hole is provided with a first gasket groove, and the other end is provided with a second gasket groove, the first gasket is arranged in the first gasket groove, the second gasket is arranged in the second gasket groove, and the two ends of the second return spring are respectively against the first gasket and the second gasket. The outer diameters of the first gasket groove and the second gasket groove are larger than the diameters of the through hole, so that the first gasket and the second gasket can be confined in the gasket groove to achieve positioning.

[0007] Furthermore, in order to achieve the abutment of the first return spring, specifically, a first annular boss is provided on the inner wall of the coil skeleton, and the first return spring abuts on the first annular boss.

[0008] Furthermore, it also includes two wiring terminals, one end of which is embedded inwardly from one side of the upper shell into the coil frame of the coil assembly, and the wiring terminal is electrically connected to the coil.

[0009] Furthermore, it also includes a first sealing ring, which is arranged on the lower end surface of the sealing seat to achieve sealing between the sealing seat and the external contact component installed thereon.

[0010] Furthermore, it also includes a second sealing ring, which is arranged on the lower end surface of the lower shell, and the second sealing ring is concentrically arranged outside the first sealing ring to achieve sealing between the lower shell and the external contact component installed thereon.

[0011] Furthermore, it also includes a third sealing ring, which is arranged on the contact surface between the lower end of the coil skeleton and the lower shell, and is used to achieve sealing between the coil skeleton and the lower shell, so as to prevent the gas in the airflow channel from entering the coil side from between the coil skeleton and the lower shell and affecting its working effect.

[0012] Furthermore, it also includes a fourth sealing ring, which is arranged on the contact surface between the upper end of the coil skeleton and the spring guide column of the upper shell body, and is used to achieve sealing between the coil skeleton and the upper shell body.

[0013] Furthermore, it also includes a fifth sealing ring, which is arranged on the periphery of the air inlet hole to achieve air intake sealing.

[0014] Furthermore, a second buffer cavity is provided between the coil frame above the first air outlet and the lower shell, and the second buffer cavity is used to connect the first air outlet and the airflow channel to buffer and store the airflow.

[0015] The beneficial effects of the utility model are as follows: the three-way solenoid valve provided by the utility model has a simple structure and is easy to control. Only a very small electromagnetic force is needed to control the switch of the valve core, thereby controlling the direction of the airflow and realizing the control of the switch of the high-pressure main circuit cut-off valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the three-way solenoid valve of the utility model.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the three-way solenoid valve of the utility model.

[0019] Figure 3 It is a side structural schematic diagram of the three-way solenoid valve of the utility model.

[0020] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA.

[0021] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional structure of BB.

[0022] Figure 6 It is a structural schematic diagram of the upper shell.

[0023] Figure 7 It is a schematic diagram of the top structure of the upper shell.

[0024] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure of CC.

[0025] Fig. 9 It is a schematic diagram of the structure of the lower shell.

[0026] Fig.10 It is a schematic diagram of the structure of the lower shell.

[0027] Fig.11 It is a schematic diagram of the cross-sectional structure of the lower shell.

[0028] Fig.12 It is a structural schematic diagram of the sealing seat.

[0029] Fig.13 It is a structural schematic diagram of the sealing seat.

[0030] Fig.14 It is a schematic diagram of the working principle of the solenoid valve when it is not energized.

[0031] Fig.15 It is a schematic diagram of the working principle of the solenoid valve when it is energized.

[0032] In the figure: 1, upper shell, 1.1, spring guide column, 1.2, air inlet, 1.3, terminal lead-out hole, 1.4, second annular boss, 2, lower shell, 2.1, valve core seat, 2.2, first air outlet, 2.3, annular groove, 3, coil assembly, 3.1, coil, 3.2, coil skeleton, 4, sealing seat, 4.1, second air outlet, 4.2, third air outlet, 4.3, sealing ring boss, 4.4, annular column, 5, valve core assembly, 5.1, armature, 5.2, second return spring, 5.3, first sealing pad, 5.4, second sealing pad, 6, first return spring, 7, first sealing ring, 8, second sealing ring, 9, third sealing ring, 10, fourth sealing ring, 11, fifth sealing ring, 12, spring fixing seat, 13, terminal. DETAILED DESCRIPTION

[0033] The present invention is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter for which protection is sought is limited only by the attached claims and their equivalents.

[0034] like Figure 1-Figure 13As shown, a three-way solenoid valve of the utility model comprises an upper shell 1, a lower shell 2, a coil assembly 3, a valve core assembly 5, a sealing seat 4 and a first reset spring 6, wherein the upper shell 1 and the lower shell 2 are both hollow structures, and the open ends are engaged with each other, the coil assembly 3 is arranged inside the upper shell 1 and the lower shell 2, the coil assembly 3 comprises a coil 3.1 and a coil skeleton 3.2, the coil 3.1 is wound around the outside of the coil skeleton 3.2, and an opening is arranged inside the coil skeleton 3.2 along the axial direction, a spring guide column 1.1 is arranged inside the upper shell 1, and a valve core seat 2.1 is arranged inside the lower shell 2, the valve core seat 2.1 is an annular sleeve structure, and the spring guide column 1.1 and the valve core seat 2.1 are respectively arranged from the upper and lower ends. Inserted into the opening of the coil skeleton 3.2; an air inlet hole 1.2 is axially provided in the spring guide column 1.1, the valve core assembly 5 is arranged in the inner hole of the valve core seat 2.1, and can move axially in the valve core seat 2.1, the upper end of the valve core assembly 5 is opposite to the air inlet hole 1.2 of the spring guide column 1.1, and the opening and closing of the air inlet hole 1.2 is controlled by the axial movement of the valve core assembly 5 in the valve core seat 2.1; the upper end of the first return spring 6 is sleeved on the spring guide column 1.1 and the end portion abuts against the coil skeleton 3.2 of the coil assembly 3. In order to achieve the abutment of the first return spring 6, a first annular boss is provided on the inner wall of the coil skeleton 3.2, and the first return spring 6 abuts on the first annular boss. The lower end of the first return spring 6 is connected to the spring fixing seat 12, and the spring fixing seat 12 is fixedly sleeved on the upper end of the valve core assembly 5; a plurality of first air outlet holes 2.2 are circumferentially arranged on the lower shell body 2 outside the valve core seat 2.1, and the first air outlet holes 2.2 and the air inlet holes 1.2 are communicated through the air flow channel arranged between the coil skeleton 3.2 and the valve core seat 2.1; the sealing seat 4 is sealed at the bottom of the lower shell body 2, and a first buffer cavity is formed between the sealing seat 4 and the valve core seat 2.1, a second air outlet hole 4.1 is arranged in the middle of the sealing seat 4, and the second air outlet hole 4.1 is directly opposite to the lower end of the valve core assembly 5, and an annular column 4.4 is arranged on the upper end of the second air outlet hole 4.1, through which the annular column 4.4 can be pressed against the first sealing pad 5.3 at the lower end of the valve core assembly 5, and a plurality of third air outlet holes 4.2 are distributed circumferentially around the second air outlet hole 4.1, and the first air outlet hole 2.2 is communicated with the third air outlet hole 4.2 through the first buffer cavity.

[0035] like Figure 4As shown, the valve core assembly 5 includes an armature 5.1, a second return spring 5.2, a first sealing gasket 5.3 and a second sealing gasket 5.4. A through hole is provided inside the armature 5.1, and the second return spring 5.2 is placed in the through hole. One end of the through hole is provided with a first gasket groove, and the other end is provided with a second gasket groove. The first gasket 5.3 is arranged in the first gasket groove, and the second gasket 5.4 is arranged in the second gasket groove, and the two ends of the second return spring 5.2 are respectively against the first gasket 5.3 and the second gasket 5.4. The outer diameters of the first gasket groove and the second gasket groove are larger than the diameters of the through hole, so that the first gasket 5.3 and the second gasket 5.4 can be restricted in the gasket groove to achieve positioning.

[0036] like Figure 8 As shown, in order to facilitate the on-off control of the solenoid valve, the air inlet hole 1.2 is a two-stage stepped hole, the aperture of which decreases along the airflow direction, including a first stage aperture and a second stage aperture, and the second stage aperture is 1 / 4-2 / 3 of the first stage aperture. The diameter of the air inlet hole 1.2 is relatively small, and even under high pressure, the force of the gas on the valve core is relatively small, so that the solenoid valve only needs a small electromagnetic force to overcome the gas pressure and the reset spring force to realize the on and off of the solenoid valve.

[0037] like Figure 5 and Figure 8 As shown, it also includes a connection terminal 13, which is two, and one end of which is embedded inwardly from the terminal lead-out hole 1.3 on one side of the upper shell 1 into the coil skeleton 3.2 of the coil assembly 3, and the connection terminal 13 is electrically connected to the coil. There are also two terminal lead-out holes 1.3, matching the number of the connection terminals 13.

[0038] like Figure 4As shown, it also includes a first sealing ring 7, a second sealing ring 8, a third sealing ring 9, a fourth sealing ring 10 and a fifth sealing ring 11. The first sealing ring 7 is arranged on the lower end surface of the sealing seat 4 to achieve sealing between the sealing seat 4 and the external contact component installed thereon. In order to achieve the installation of the first sealing ring 7, a sealing ring boss 4.3 is arranged on the periphery of the second air outlet 4.1 below the sealing seat 4, and the first sealing ring 7 is installed on the outside of the sealing ring boss 4.3. The second sealing ring 8 is arranged on the lower end surface of the lower housing 2, and the second sealing ring 8 is concentrically arranged on the outside of the first sealing ring 7 to achieve sealing between the lower housing 2 and the external contact component installed thereon; in order to achieve the installation of the second sealing ring 8, an annular groove 2.3 is arranged on the bottom surface of the lower housing, and the second sealing ring 8 is embedded in the annular groove 2.3. The third sealing ring 9 is arranged on the contact surface between the lower end of the coil skeleton 3.2 and the lower housing 2, and is used to achieve sealing between the coil skeleton 3.2 and the lower housing 2, so as to prevent the gas in the air flow channel from entering the coil side from between the coil skeleton 3.2 and the lower housing 2, thereby affecting its working effect. The fourth sealing ring 10 is arranged on the contact surface between the upper end of the coil skeleton 3.2 and the spring guide column 1.1 of the upper shell 1, and is used to achieve the sealing between the coil skeleton 3.2 and the upper shell 1. In order to achieve the installation of the fourth sealing ring 10, the outer wall of the spring guide column 1.1 of the upper shell 1 is provided with a second annular boss 1.4, and the coil skeleton 3.2 is provided with a third annular boss, and the second annular boss 1.4 is complementary to the third annular boss, and together form an installation cavity for the fourth sealing ring 10. The fifth sealing ring 11 is arranged on the periphery of the air inlet 1.2, and is used to achieve the air inlet sealing. A second buffer cavity is provided between the coil skeleton 3.2 and the lower shell 2 above the first air outlet 2.2. The second buffer cavity is used to connect the first air outlet 2.2 and the airflow channel to buffer and store the airflow.

[0039] Working principle:

[0040] like Fig.14 As shown, when the coil assembly 3 is not energized, the valve core assembly 5 moves downward to the bottom of the valve core seat 2.1 under the action of the first return spring 6. At this time, the first sealing gasket 5.3 at the lower end of the valve core assembly 5 abuts against the annular column 4.4 to block the second air outlet 4.1. The second sealing gasket 5.4 at the upper end of the valve core assembly 5 is separated from the air inlet 1.2, and the air inlet 1.2 is opened. The high-pressure gas enters from the air inlet 1.2, and then flows out of the solenoid valve through the air flow channel between the coil skeleton 3.2 and the valve core seat 2.1, the second buffer cavity, the first air outlet 2.2, the first buffer cavity, and the third air outlet 4.2. The red arrow in the figure indicates the air flow direction.

[0041] like Fig.15As shown, when the coil assembly 3 is energized to generate electromagnetic force to drive the valve core assembly 5 to move upward, the second sealing gasket 5.4 at the upper end of the valve core assembly 5 blocks the air inlet 1.2. At this time, high-pressure gas cannot enter from the air inlet 1.2; due to the upward movement of the valve core assembly 5, the first sealing gasket 5.3 at the lower end of the valve core assembly 5 is separated from the annular column 4.4 at the upper end of the second air outlet 4.1, and the second air outlet 4.1 and the third air outlet 4.2 are connected through the first buffer cavity. The green arrow in the figure indicates the direction of airflow, and the blue arrow indicates the moving direction of the valve core assembly 5.

[0042] When the solenoid valve is powered off, the airflow flows from the air inlet to one of the outlets. When powered on, the air inlet is closed and the two outlet channels are connected. By powering on and off, the on-off between different channels is achieved. By powering on and off the coil assembly 3, the on-off switching between the air inlet 1.2, the second air outlet 4.1, and the third air outlet 4.2 is achieved, thereby achieving the function of a three-way connection.

[0043] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A three-way solenoid valve, characterized in that: It includes an upper shell, a lower shell, a coil assembly, a valve core assembly, a sealing seat and a first return spring, wherein the upper shell and the lower shell are both hollow structures, and the open ends are engaged with each other, the coil assembly is arranged inside the upper shell and the lower shell, the coil assembly includes a coil and a coil skeleton, an opening is axially arranged inside the coil skeleton, a spring guide column is arranged inside the upper shell, a valve core seat is arranged inside the lower shell, the spring guide column and the valve core seat are respectively inserted into the opening of the coil skeleton from the upper and lower ends; an air inlet hole is axially arranged inside the spring guide column, the valve core assembly is arranged in the inner hole of the valve core seat, and can move axially in the valve core seat, the upper end of the valve core assembly is opposite to the air inlet hole of the spring guide column, the upper end of the first return spring is sleeved on the spring guide column and the end portion abuts against the coil assembly The closure of the valve core assembly is shaped like a circle, and the closure of the valve core assembly is shaped like a circle. The closure of the valve core assembly is shaped like a circle, and the closure of the valve core assembly is shaped like a circle. The closure of the valve core assembly is shaped like a circle, and the closure of the valve core assembly is shaped like a circle.

2. The three-way solenoid valve according to claim 1, characterized in that: The air inlet hole is a two-stage stepped hole, the aperture decreases along the airflow direction, and the aperture of the second stage is 1 / 4-2 / 3 of the aperture of the first stage.

3. The three-way solenoid valve according to claim 1, characterized in that: The valve core assembly includes an armature, a second return spring, a first sealing gasket and a second sealing gasket. A through hole is provided inside the armature, and the second return spring is placed in the through hole. A first gasket groove is provided at one end of the through hole, and a second gasket groove is provided at the other end. The first sealing gasket is arranged in the first gasket groove, and the second sealing gasket is arranged in the second gasket groove, and both ends of the second return spring are respectively against the first sealing gasket and the second sealing gasket.

4. The three-way solenoid valve according to claim 1, characterized in that: A first annular boss is provided on the inner wall of the coil frame, and the first return spring abuts against the first annular boss.

5. The three-way solenoid valve according to claim 1, characterized in that: It also includes two connection terminals, one end of which is embedded inwardly from one side of the upper shell into the coil frame of the coil assembly, and the connection terminal is electrically connected to the coil.

6. The three-way solenoid valve according to claim 1, characterized in that: It also includes a first sealing ring, which is arranged on the lower end surface of the sealing seat to achieve sealing between the sealing seat and the external contact component installed thereon.

7. The three-way solenoid valve according to claim 6, characterized in that: It also includes a second sealing ring, which is arranged on the lower end surface of the lower shell, and the second sealing ring is concentrically arranged outside the first sealing ring to achieve sealing between the lower shell and the external contact component installed thereon.

8. The three-way solenoid valve according to claim 1, characterized in that: It also includes a third sealing ring and a fourth sealing ring. The third sealing ring is arranged on the contact surface between the lower end of the coil skeleton and the lower shell; the fourth sealing ring is arranged on the contact surface between the upper end of the coil skeleton and the spring guide column of the upper shell.

9. The three-way solenoid valve according to claim 1, characterized in that: It also includes a fifth sealing ring, which is arranged on the periphery of the air inlet hole and is used to achieve air inlet sealing.

10. The three-way solenoid valve according to claim 1, characterized in that: A second buffer chamber is provided between the coil frame above the first air outlet and the lower shell.

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