Coaxial electromagnetic valve structure

Abstract

The utility model discloses a coaxial electromagnetic valve structure which comprises a hollow valve element, an inlet valve body, a pole shoe, a spring, an armature, a sealing baffle and a sealing seat are sequentially sleeved on the periphery of the valve element from left to right, a coil is arranged on the periphery of the pole shoe and the armature, a coil cover is arranged on the outer side of the coil, and an outlet valve body is sleeved on the sealing baffle, the sealing seat and the coil cover. A valve seat assembly is sleeved with the outlet valve body, a through hole enabling the top face and the bottom face of the valve seat assembly to be communicated is formed in the valve seat assembly, a circulation hole directly faces a counter bore in the end face of the sealing seat, clamping grooves are formed in the positions, at the left end and the right end of the armature, of the periphery of the valve element respectively, clamping rings are connected in the clamping grooves in a clamped mode, and the two clamping rings abut against the left end and the right end of the armature respectively. The coil cover is of a U-like structure. According to the electromagnetic valve structure, the number of parts is reduced through combination of the parts, so that the electromagnetic valve is easy to assemble, the production period is shortened, accumulative errors among the parts are reduced, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to a solenoid valve structure, and more particularly to a coaxial solenoid valve structure. Background Technology

[0002] A coaxial solenoid valve is a valve that uses electromagnetic principles to control fluid systems and is widely used in automated control systems. The main functions of a solenoid valve include on / off control, flow regulation, direction control, and automation control. It can precisely and stably control the flow of gas or liquid, achieving system control and regulation.

[0003] Current coaxial solenoid valves typically contain at least a dozen parts. This large number of parts leads to complex assembly processes, long production cycles, and high production costs. Furthermore, assembly errors inherent in the parts themselves increase with the number of parts, resulting in greater cumulative errors. To reduce these cumulative errors, almost all parts must be machined, which significantly increases costs. Utility Model Content

[0004] The purpose of this invention is to provide a coaxial solenoid valve structure. This structure reduces the number of parts through component assembly, simplifying assembly, shortening the production cycle, and reducing cumulative errors between parts. The reduced number of parts also allows some components to be manufactured using casting methods, thus lowering production costs.

[0005] The technical solution of this utility model is as follows: A coaxial solenoid valve structure includes a hollow valve core. From left to right, an inlet valve body, a pole shoe, a spring, an armature, a sealing baffle, and a sealing seat are sequentially fitted on the outer periphery of the valve core. A coil is provided on the outer periphery of the pole shoe and the armature. A coil cover is provided on the outer side of the coil. An outlet valve body is fitted on the sealing baffle, the sealing seat, and the coil cover. A valve seat assembly is fitted inside the outlet valve body. The valve seat assembly is provided with a through hole that connects its top and bottom surfaces. The flow hole is aligned with the countersunk hole on the end face of the sealing seat. A retaining groove is provided on the outer periphery of the valve core at both ends of the armature. A retaining ring is engaged in the retaining groove. The two retaining rings abut against the left and right ends of the armature, respectively. The pole shoe has a T-shaped structure, and the coil cover has a U-shaped structure.

[0006] In the aforementioned coaxial solenoid valve structure, a spring cavity is provided on the inner wall of the pole shoe facing the armature, and the spring is inserted into the spring cavity.

[0007] In the aforementioned coaxial solenoid valve structure, an annular groove is provided on the end face of the valve seat assembly near the valve core, and a vulcanized rubber seal is inserted into the annular groove.

[0008] The beneficial effects of this utility model are as follows: Compared with the prior art, the coaxial solenoid valve structure of this utility model reduces the number of parts constituting the entire solenoid valve structure by adjusting the installation position of the spring, making the pole shoe into a T-shaped structure, making the coil cover into a U-shaped structure, and setting the seal on the valve seat assembly as a vulcanized rubber seal. This simplifies the assembly of the solenoid valve, shortens the production cycle, and reduces the cumulative error between parts. The reduction in the number of parts allows some parts to be produced by casting, thus reducing production costs. It also reduces the processing difficulty of the seal, thereby facilitating the production and processing of sealing parts. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Reference numerals: 1-valve core, 2-inlet valve body, 3-pole shoe, 4-spring, 5-armature, 6-sealing baffle, 7-sealing seat, 8-coil, 9-coil cover, 10-outlet valve body, 11-valve seat assembly, 12-flow hole, 13-clamping ring, 14-spring cavity, 15-vulcanized rubber seal. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0012] An embodiment of this utility model: A coaxial solenoid valve structure includes a tubular structure and a hollow valve core 1. From left to right, an inlet valve body 2, a pole shoe 3, a spring 4, an armature 5, a sealing baffle 6, and a sealing seat 7 are sequentially fitted onto the outer periphery of the valve core 1. A coil 8 is disposed around the pole shoe 3 and the armature 5, and a coil cover 9 is disposed outside the coil 8. An outlet valve body 10 is fitted onto the sealing baffle 6, the sealing seat 7, and the coil cover 9. A valve seat assembly 11 is fitted inside the outlet valve body 10. The valve seat assembly 11 has a through hole 12 connecting its top and bottom surfaces. The through hole 12 is aligned with the countersunk hole on the end face of the sealing seat 7. A retaining groove is provided on the outer periphery of the valve core 1 at both the left and right ends of the armature 5. A retaining ring 13 is engaged in the retaining groove, and the two retaining rings 13 respectively abut against the left and right ends of the armature 5, thereby fixing the armature 5 and the valve core 1 together. The pole shoe 3 has a T-shaped structure, and the coil cover 9 has a U-shaped structure.

[0013] Compared with existing coaxial solenoid valves, the improvements of this utility model are as follows:

[0014] 1. The location of spring 4 has been changed. In existing solenoid valves, spring 4 is located near the inlet end of valve core 1, requiring a spring seat to fix it. In this invention, spring 4 is located between pole shoe 3 and armature 5, eliminating the need for a separate spring seat to limit its movement.

[0015] 2. The pole shoe 3 is manufactured as a T-shaped structure, with its dimension near the inlet end being larger than the other parts. Existing solenoid valves generally have a retaining ring at the inlet end near the pole shoe 3. However, in this invention, the retaining ring structure is combined with the pole shoe 3 to form a T-shaped structure. This structure reduces the number of parts, making the entire solenoid valve easier to assemble. Moreover, by combining the retaining ring structure with the pole shoe 3, there is no problem of assembly error between the two, reducing the cumulative error generated during the assembly process.

[0016] 3. The coil cover 9 is made into a U-shaped structure. Existing solenoid valves have a tubular coil cover 9 with a separate cover plate near the outlet end. In this invention, the coil cover 9 and the cover plate are combined to form a U-shaped structure. This design achieves the same technical effect as the pole shoe 3. Furthermore, in previous solenoid valve structures, there were certain assembly requirements between the coil cover 9 and the cover plate, requiring machining. In this invention, because the assembly requirements between the coil cover 9 and other parts are not particularly high, the overall structure can be manufactured by casting, thus reducing the production cost of the parts.

[0017] The solenoid valve of this invention is used in the same way as existing solenoid valves. When the coil 8 is not energized, the spring 4 is in its normal state, with the right end face of the spring 4 abutting the left end face of the armature 5. Since the armature 5 is fixed together with the valve core 1, under the elastic force of the spring 4, the right end face of the valve core 1 abuts against the left end face of the valve seat assembly 11 to achieve a seal. At this time, the internal passage of the solenoid valve is disconnected, and the solenoid valve is in a normally closed state. At this time, there is a gap between the left end face of the armature 5 and the right end face of the pole shoe 3. When the coil 8 is energized, the armature 5 moves towards the pole shoe 3 under the action of electromagnetic force. The armature 5 drives the valve core 1, which is fixedly connected to it, to move to the left, so that the right end face of the valve core 1 separates from the left end face of the valve seat assembly 11. The fluid inside the valve core 1 enters the countersunk hole of the sealing seat 7 from the right end of the valve core 1, and then flows out from the outlet through the flow hole 12 on the assembly 11. When the coil 8 is energized, the solenoid valve is in the open state. During the opening process of the solenoid valve, the spring 4 is compressed. When coil 8 is de-energized, the electromagnetic force disappears, valve core 1 is reset under the elastic force of spring 4, and the solenoid valve closes.

[0018] The inner wall of the pole shoe 3 is provided with a spring cavity 14 at the end facing the armature 5. The spring 4 is inserted into the spring cavity 14, and the spring 4 is limited by the spring cavity 14.

[0019] The valve seat assembly 11 has an annular groove on its end face near the valve core 1. A vulcanized rubber seal 15 is inserted into the annular groove. When the coil 8 is not energized, the outlet end of the valve core 1, under the elastic force of the spring 4, abuts against the surface of the vulcanized rubber seal 15, breaking the flow channel and allowing the vulcanized rubber seal 15 to provide a seal. Previously, the seals on the solenoid valve seat assembly 11 were made of polytetrafluoroethylene (PTFE). PTFE is relatively hard, requiring a high degree of surface flatness to ensure a good seal, which increases the difficulty of machining the parts. Therefore, we use vulcanized rubber to manufacture the vulcanized rubber seal 15. Because vulcanized rubber has a certain elasticity, it provides a good seal during contact with the valve core 1. Therefore, the surface flatness requirement for the vulcanized rubber seal 15 is not as high as that for PTFE, making the manufacturing of the sealing parts easier.

Claims

1. A coaxial solenoid valve structure, characterized by: The valve includes a hollow valve core (1). From left to right, an inlet valve body (2), a pole shoe (3), a spring (4), an armature (5), a sealing baffle (6), and a sealing seat (7) are sequentially fitted onto the outer periphery of the valve core (1). A coil (8) is provided around the pole shoe (3) and the armature (5). A coil cover (9) is provided around the outside of the coil (8). An outlet valve body (10) is fitted onto the sealing baffle (6), the sealing seat (7), and the coil cover (9). A valve seat assembly (11) is fitted inside. The valve seat assembly (11) is provided with a through hole (12) that connects its top and bottom surfaces. The flow hole (12) is directly opposite the countersunk hole on the end face of the sealing seat (7). A slot is provided on the outer periphery of the valve core (1) at both ends of the armature (5). A retaining ring (13) is engaged in the slot. The two retaining rings (13) abut against the left and right ends of the armature (5) respectively. The pole shoe (3) is a T-shaped structure and the coil cover (9) is a U-shaped structure.

2. A coaxial solenoid valve structure according to claim 1, characterized in that: The inner wall of the pole shoe (3) is provided with a spring cavity (14) at the end facing the armature (5), and the spring (4) is inserted into the spring cavity (14).

3. A coaxial solenoid valve structure according to claim 1, characterized in that: The valve seat assembly (11) has an annular groove on the end face near the valve core (1), and a vulcanized rubber seal (15) is inserted into the annular groove.

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