Pneumatic electromagnetic valve of movable iron core double-face sealing structure

Abstract

The utility model discloses a pneumatic electromagnetic valve with a movable iron core double-face sealing structure, which relates to the technical field of electromagnetic valves and comprises a valve sleeve, a sleeve is fixedly sleeved on the outer wall of one end of the valve sleeve, a coil framework is fixedly sleeved on the other end of the sleeve, and a coil is sleeved on the outer wall of the coil framework. The first sealing rubber and the second sealing rubber are arranged at the two ends of the coil framework, the movable iron core is slidably connected into one end of the coil framework in a sleeved mode, the movable iron core is located at the end close to the valve sleeve, the fixed iron core is fixedly connected to the inner wall of the other end of the coil framework in a sleeved mode, and the movable iron core is located between the valve sleeve and the fixed iron core. According to the electromagnetic valve, glue is not directly injected into the movable iron core, adverse effects caused by the fact that parts in the movable iron core participate in other part processes can be avoided, the service life of the electromagnetic valve is directly prolonged, the sealing performance of the electromagnetic valve is directly improved, meanwhile, material waste is avoided, the structure of the movable iron core does not need to be changed, and the mold opening cost of an injection mold is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a pneumatic solenoid valve with a double-sided sealing structure of a moving iron core. Background Art

[0002] A pneumatic solenoid valve is a mechatronic product widely used in the control field. A pneumatic solenoid valve controls the flow of gas based on electromagnetic force. When an electric current passes through an electromagnetic coil, the coil generates a magnetic field, and the magnetic field acts on a moving iron core. The moving iron core moves under the action of the magnetic field, changing the gas flow channel, controlling the gas flow rate or direction. Different flow channels are provided inside the valve body, and the movement of the valve core changes the opening and closing state of the flow channel, thereby realizing the on-off control of the gas.

[0003] For example, a pneumatic control valve for a selection and shift cylinder of a commercial vehicle transmission disclosed in the Chinese patent document with the publication number CN117967856A records that "it includes a valve sleeve, a sleeve, a plastic skeleton, a coil, a static iron core, a moving iron core and a spring. An air inlet hole is provided inside the valve sleeve, and a small sealing ring is provided on the outer side of the top. A large sealing ring is sleeved on the sleeve. An exhaust hole communicating with the outside atmosphere is coaxially penetrated through the static iron core, and the static iron core is connected with a magnetic component; an air vent groove is provided on the outer side of the moving iron core". The pneumatic control valve for the selection and shift cylinder of the commercial vehicle transmission of the present invention has few parts, a simple and compact structure, and a small size, which is convenient for customers to arrange the solenoid valve on the valve plate and arrange the pneumatic control valve plate module in the gearbox.

[0004] The disadvantages existing in the prior art also lie in: specifically referring to the attached drawings of the specification Figures 7-8 .

[0005] 1. The sealing rubber is directly injected into the moving iron core. In this way, in order to ensure that the rubber does not overflow during the injection process, the moving iron core is axially subjected to a large pressing force, which will cause slight radial deformation of the moving iron core, affecting the matching accuracy and service life durability of the solenoid valve;

[0006] 2. During the injection process, taking and placing the moving iron core and intermediate transfer handling are likely to cause defects such as scratches and knocks on the surface of the moving iron core, affecting the quality of the later surface coating, making the outer surface of the moving iron core rougher, resulting in an increase in the friction force during the movement of the moving iron core and a decrease in the service life;

[0007] 3. After the injection is completed, a coating needs to be applied to the outer surface of the moving iron core. The coating is carried out in a high-temperature environment, and the high temperature will affect the service life and sealing characteristics of the sealing rubber, resulting in a decrease in the sealing performance of the solenoid valve and a decrease in the service life;

[0008] 4. The internal flow channel in the integrated injection is relatively long. Due to the high hardness of the rubber, the fluidity of the rubber is very poor, increasing the injection difficulty and affecting the injection quality;

[0009] 5. The middle part of the moving iron core is made of rubber. If both of the left and right mating parts come into contact with the sealing rubber in the central area of the flow channel, it will lead to insufficient supporting force and poor sealing performance of the solenoid valve.

[0010] 6. The sealing rubber in the flow channel has no substantial function, resulting in material waste and increasing the cost of the solenoid valve. Summary of the Utility Model

[0011] The purpose of the present utility model is to solve the deficiencies existing in the prior art, and a pneumatic solenoid valve with a double-sided sealing structure of the moving iron core is proposed.

[0012] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0013] A pneumatic solenoid valve with a double-sided sealing structure of the moving iron core, including a valve sleeve. One end outer wall of the valve sleeve is fixedly sleeved with a sleeve. The other end of the sleeve is fixedly sleeved with a coil bobbin. The outer wall of the coil bobbin is sleeved with a coil. One end inside of the coil bobbin is slidably sleeved with a moving iron core. The moving iron core is located at one end close to the valve sleeve. The inner wall of the other end of the coil bobbin is fixedly sleeved with a fixed iron core. The moving iron core is located between the valve sleeve and the fixed iron core. One end outer wall of the moving iron core close to the valve sleeve is sleeved with a spring. A first card slot is opened at the top of the moving iron core. A first support member matching the first card slot is clamped at the first card slot of the moving iron core. The inner wall of the first support member is fixedly sleeved with a first sealing rubber. A second card slot is opened at the bottom of the moving iron core. A second support member matching the second card slot is clamped at the second card slot of the moving iron core. The inner wall of the second support member is fixedly sleeved with a second sealing rubber.

[0014] Preferably, the first sealing rubber corresponds to the center of the valve sleeve, and the second sealing rubber corresponds to the center of the fixed iron core.

[0015] Preferably, a second sealing ring is fixedly sleeved on the outer wall of the valve sleeve, and a first sealing ring is fixedly sleeved on the outer wall of the sleeve.

[0016] Preferably, a housing is fixedly sleeved on the outer wall of the coil, and the inner wall of the housing is clamped with the outer wall of the coil bobbin.

[0017] The beneficial effects of the present utility model are as follows:

[0018] In the present utility model, through the cooperation of the moving iron core, the first sealing rubber, the second support member, the second sealing rubber and the first support member, the first sealing rubber and the second sealing rubber at both ends of the moving iron core both adopt an assembly form, rather than directly injecting glue into the moving iron core. It can avoid the adverse effects caused by the participation of each part in the moving iron core in the processes of other components, directly improve the service life and sealing performance of the solenoid valve, at the same time avoid material waste, and without changing the structure of the moving iron core, reduce the mold opening cost of the injection mold. Brief Description of the Drawings

[0019] Figure 1 FIG. is a schematic structural view of a pneumatic solenoid valve with a double-sided sealed structure of a moving iron core according to the present utility model.

[0020] Figure 2 FIG. is a right view of a pneumatic solenoid valve with a double-sided sealed structure of a moving iron core according to the present utility model.

[0021] Figure 3 FIG. is a sectional view taken along line A-A of a pneumatic solenoid valve with a double-sided sealed structure of a moving iron core according to the present utility model. Figure 2 in the middle

[0022] Figure 4 FIG. is a schematic structural view of a moving iron core of a pneumatic solenoid valve with a double-sided sealed structure of a moving iron core according to the present utility model.

[0023] Figure 5 FIG. is an axonometric view of a moving iron core of a pneumatic solenoid valve with a double-sided sealed structure of a moving iron core according to the present utility model.

[0024] Figure 6 FIG. is a schematic structural view of a moving iron core, a first sealing rubber, and a second sealing rubber of a pneumatic solenoid valve with a double-sided sealed structure of a moving iron core according to the present utility model.

[0025] Figure 7 FIG. is a schematic structural view of a pneumatic solenoid valve in the prior art.

[0026] Figure 8 FIG. is a schematic structural view of a moving iron core of a pneumatic solenoid valve in the prior art.

[0027] Reference numerals in the figures: 1, valve sleeve; 2, first sealing rubber; 3, spring; 4, moving iron core; 401, first card slot; 402, second card slot; 5, second support member; 6, second sealing rubber; 7, fixed iron core; 8, housing; 9, coil; 10, coil bobbin; 11, first sealing ring; 12, sleeve; 13, first support member; 14, second sealing ring. Detailed Description of the Preferred Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0029] As shown in FIGS. Figure 1 to FIGS. Figure 5 shown:

[0030] A pneumatic solenoid valve with a double-sided sealed structure of a moving iron core, comprising a valve sleeve 1. One end outer wall of the valve sleeve 1 is fixedly sleeved with a sleeve 12. The other end of the sleeve 12 is fixedly sleeved with a coil bobbin 10. A coil 9 is sleeved on the outer wall of the coil bobbin 10. A moving iron core 4 is slidably sleeved inside one end of the coil bobbin 10. The moving iron core 4 is located at one end close to the valve sleeve 1. A fixed iron core 7 is fixedly sleeved on the inner wall of the other end of the coil bobbin 10. The moving iron core 4 is located between the valve sleeve 1 and the fixed iron core 7. A spring 3 is sleeved on the outer wall of the end of the moving iron core 4 close to the valve sleeve 1. A first card slot 401 is opened at the top of the moving iron core 4. A first support member 13 that matches is clamped at the first card slot 401 of the moving iron core 4. A first sealing rubber 2 is fixedly sleeved on the inner wall of the first support member 13. A second card slot 402 is opened at the bottom of the moving iron core 4. A second support member 5 that matches is clamped at the second card slot 402 of the moving iron core 4. A second sealing rubber 6 is fixedly sleeved on the inner wall of the second support member 5. The first sealing rubber 2 corresponds to the center of the valve sleeve 1, and the second sealing rubber 6 corresponds to the center of the fixed iron core 7.

[0031] It is worth mentioning that, as Figure 3 shown, an air hole is opened in the middle of the valve sleeve 1. The air hole in the middle of the valve sleeve 1 is the P port, and the P port is used for air intake; a second air hole is opened on the outside of the valve sleeve 1. The second air hole on the outside of the valve sleeve 1 is the A port, and the A port is used for air intake and exhaust; a third air hole is opened on the outer wall of the middle of the fixed iron core 7. The third air hole in the middle of the fixed iron core 7 is the T port, and the T port is used for exhaust; at the same time, an outer groove is opened on the outer wall of the moving iron core 4, and the outer groove at the moving iron core 4 is used for gas flow.

[0032] At the same time, the valve sleeve 1, the moving iron core 4 and the fixed iron core 7 are mature technologies in this field and have been fully disclosed, so they will not be elaborated in detail in the specification.

[0033] In the above technical solution, when the solenoid valve is not powered on, the moving iron core 4 is in the position at one end close to the valve sleeve 1. At this time, the first sealing rubber 2 on the end face of the moving iron core 4 fits with the air hole on the end face of the valve sleeve 1 to achieve gas sealing. At this time, the P port is in a sealed state, and the gas flows from the air hole at the A port through the outer groove of the moving iron core 4 to the air hole at the fixed iron core 7, that is, it is discharged through the T port at the fixed iron core 7;

[0034] When the solenoid valve is powered on, the moving iron core 4 is attracted by the electromagnetic force of the fixed iron core 7 and moves downward until it is limited. At this time, the through hole on the end face of the fixed iron core 7 fits with the second sealing rubber 6 on the end face of the moving iron core 4 to achieve T port sealing. At this time, the gas flows in from the P port and flows out from the A port. The first sealing rubber 2 and the second sealing rubber 6 at both ends of the moving iron core 4 achieve the sealing of different air inlet and outlet holes through left and right movement.

[0035] As attached Figure 1As shown in the figure, a second sealing ring 14 is fixedly sleeved on the outer wall of the valve sleeve 1, a first sealing ring 11 is fixedly sleeved on the outer wall of the sleeve 12, a housing 8 is fixedly sleeved on the outer wall of the coil 9, and the inner wall of the housing 8 is clamped with the outer wall of the coil skeleton 10.

[0036] Specific usage method and function of this embodiment:

[0037] When the solenoid valve is not powered on during the use of the present utility model, the moving iron core 4 is located at a position close to one end of the valve sleeve 1. At this time, the first sealing rubber 2 on the end face of the moving iron core 4 fits with the air hole on the end face of the valve sleeve 1 to achieve gas sealing. At this time, the P port is in a sealed state, and the gas flows from the air hole at the A port through the outer groove of the moving iron core 4 to the air hole at the fixed iron core 7, that is, it is discharged through the T port at the fixed iron core 7.

[0038] For the above structure and process, please refer to Figures 1-6 .

[0039] When the solenoid valve is powered on, the moving iron core 4 moves downward until it is limited by the electromagnetic force of the fixed iron core 7. At this time, the through hole on the end face of the fixed iron core 7 fits with the second sealing rubber 6 on the end face of the moving iron core 4 to achieve T port sealing. At this time, the gas flows in from the P port and out from the A port. The first sealing rubber 2 and the second sealing rubber 6 at both ends of the moving iron core 4 achieve the sealing of different air inlet and outlet holes through left and right movement.

[0040] For the above structure and process, please refer to Figures 1-6 .

[0041] Installation method of the moving iron core 4, the first sealing rubber 2, the second support member 5, the second sealing rubber 6 and the first support member 13: First, inject the first sealing rubber 2 and the second sealing rubber 6 into the first support member 13 and the second support member 5. Then, apply a coating to the outer surface of the moving iron core 4 alone. Finally, press the injection-molded first sealing rubber 2 and second sealing rubber 6 together with the first support member 13 and the second support member 5 into the first card slot 401 and the second card slot 402 in the moving iron core 4, that is, the installation of the moving iron core 4 is completed.

[0042] For the above structure and process, please refer to Figures 4-6 .

[0043] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A pneumatic solenoid valve with a double-sided sealing structure for a moving iron core, comprising a valve sleeve (1), characterized in that: A sleeve (12) is fixedly sleeved on the outer wall of one end of the valve sleeve (1), a coil frame (10) is fixedly sleeved on the other end of the sleeve (12), a coil (9) is sleeved on the outer wall of the coil frame (10), a moving iron core (4) is slidably sleeved on the inside of one end of the coil frame (10), the moving iron core (4) is located at one end close to the valve sleeve (1), a fixed iron core (7) is fixedly sleeved on the inner wall of the other end of the coil frame (10), the moving iron core (4) is located between the valve sleeve (1) and the fixed iron core (7), and the moving iron core (4) is close to the valve sleeve (1). A spring (3) is sleeved on the outer wall of the end; a first slot (401) is provided on the top of the movable iron core (4); a matching first support member (13) is sleeved on the movable iron core (4) at the first slot (401); a first sealing rubber (2) is fixedly sleeved on the inner wall of the first support member (13); a second slot (402) is provided on the bottom of the movable iron core (4); a matching second support member (5) is sleeved on the movable iron core (4) at the second slot (402); a second sealing rubber (6) is fixedly sleeved on the inner wall of the second support member (5).

2. A pneumatic solenoid valve with a double-sided sealing structure for a moving iron core according to claim 1, characterized in that: The first sealing rubber (2) corresponds to the center of the valve sleeve (1), and the second sealing rubber (6) corresponds to the center of the fixed iron core (7).

3. A pneumatic solenoid valve with a double-sided sealing structure for a moving iron core according to claim 1, characterized in that: A second sealing ring (14) is fixedly sleeved on the outer wall of the valve sleeve (1), and a first sealing ring (11) is fixedly sleeved on the outer wall of the sleeve (12).

4. A pneumatic solenoid valve with a moving iron core double-sided sealing structure according to claim 1, characterized in that: The outer wall of the coil (9) is fixedly sleeved with a shell (8), and the inner wall of the shell (8) and the outer wall of the coil frame (10) are mutually clamped.

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