Low-noise electromagnetic valve core iron mechanism

Abstract

The utility model discloses a low-noise electromagnetic valve core iron mechanism, and belongs to the field of electromagnetic valves. The core iron mechanism comprises a fixed core iron and a movable core iron below the fixed core iron. And an upper accommodating groove with an upward opening is formed in the upper end surface of the movable core iron. The upper containing groove is provided with an upper groove upper section and an upper groove lower section. The core iron mechanism further comprises a noise reduction piece made of non-metal materials. The silencing piece is provided with a cylindrical part and a flanging part. And the cylindrical part is accommodated in the lower section of the upper groove. And the flanging part is accommodated in the upper section of the upper groove. And the upper end surface of the flanging part is higher than the upper end surface of the movable core iron. The utility model has the beneficial effect that the silencing piece is configured so as to reduce the sound caused by the attraction of the fixed core iron and the movable core iron.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a low-noise electromagnetic valve core iron mechanism. Background Art

[0002] Solenoid valves are commonly used self-control components in automatic control and protection circuits in refrigeration and air conditioning systems. The solenoid valve core iron mechanism is the actuator of the solenoid valve. The working principle of the solenoid valve core iron mechanism: when the electromagnetic coil is energized, the moving core iron overcomes the elastic force of the return spring and attracts the fixed core iron, and the valve is opened. Since the fixed core iron and the moving core iron are both made of metal, a loud sound will be generated when the two are attracted. In some industries, the solenoid valve is required to be opened and closed frequently, and the above-mentioned solenoid valve core iron mechanism will cause noise pollution to the environment. Summary of the invention

[0003] The utility model aims to solve the technical problem in the prior art that the fixed core iron and the moving core iron of the electromagnetic valve produce a loud noise when they are attracted, and provides a novel low-noise electromagnetic valve core iron mechanism.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: A low-noise electromagnetic valve core iron mechanism, comprising: a fixed core iron and a moving core iron below the fixed core iron. The upper end surface of the moving core iron is formed with an upper accommodating groove opening upward. The upper accommodating groove has an upper groove upper section and an upper groove lower section. The low-noise electromagnetic valve core iron mechanism also includes: a silencer made of non-metallic material. The silencer has a cylindrical portion and a flange portion. The cylindrical portion is accommodated inside the lower section of the upper groove. The flange portion is accommodated inside the upper section of the upper groove. The upper end surface of the flange portion is higher than the upper end surface of the moving core iron.

[0005] As a preferred solution of the low-noise electromagnetic valve core iron mechanism, it further includes: a fixed sleeve, a return spring and an electromagnetic coil. The fixed sleeve extends vertically, and the upper end of the fixed sleeve is closed and the lower end is open. The fixed core iron and the moving core iron are inside the fixed sleeve. Among them, the fixed core iron is fixed, and the moving core iron can move up and down along the fixed sleeve. The return spring is between the fixed core iron and the moving core iron. The electromagnetic coil is outside the fixed sleeve. When the electromagnetic coil is energized, the fixed core iron and the moving core iron are attracted. When the electromagnetic coil is not energized, the return spring separates the fixed core iron from the moving core iron.

[0006] As a preferred solution for the low-noise solenoid valve core iron mechanism, the muffler can be made of carbon fiber reinforced polytetrafluoroethylene material. Carbon fiber reinforced polytetrafluoroethylene material has better muffler ability than polytetrafluoroethylene or other non-metallic materials.

[0007] As a preferred solution for the low-noise electromagnetic valve core iron mechanism, the inner diameter of the upper section of the upper groove is greater than the inner diameter of the lower section of the upper groove; the flange portion extends radially outward from the upper edge of the cylindrical portion.

[0008] Compared with the prior art, the beneficial effects of the utility model are at least: 1. The silencer is configured to reduce the sound caused by the attraction between the fixed core iron and the moving core iron; 2. The upper accommodating groove of the moving core iron adopts a two-stage design, in order to reliably and conveniently fix the silencer on the moving core iron.

[0009] In addition to the technical problems solved by the utility model, the technical features that constitute the technical solution, and the beneficial effects brought about by the technical features of the technical solution described above, other technical problems that can be solved by the utility model, other technical features included in the technical solution, and the beneficial effects brought about by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0011] Figure 2 It is a structural schematic diagram of the position of the moving core iron in an embodiment of the utility model. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below through specific implementations in combination with the accompanying drawings. It should be noted that the description of these implementations is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0013] See also Figure 1 and Figure 2 The figure shows a low-noise electromagnetic valve core iron mechanism. The low-noise electromagnetic valve core iron mechanism comprises: a fixed sleeve 1, a fixed core iron 2, a moving core iron 3, a return spring 4, an electromagnetic coil 5 and a silencer 6, etc.

[0014] The fixed sleeve 1 extends vertically. The upper end of the fixed sleeve 1 is closed, while the lower end is open. The fixed sleeve 1 contains the fixed core iron 2 and the moving core iron 3. The fixed core iron 2 is on the top, while the moving core iron 3 is on the bottom. The fixed core iron 2 is fixed, while the moving core iron 3 can move up and down along the fixed sleeve 1. There is a return spring 4 between the fixed core iron 2 and the moving core iron 3. The fixed sleeve 1 has the electromagnetic coil 5 suitable for direct current on the outside. When the electromagnetic coil 5 is energized, the moving core iron 3 overcomes the elastic force of the return spring 4 and moves upward, and the fixed core iron 2 is attracted to the moving core iron 3. When the electromagnetic coil 5 is not energized, the return spring 4 separates the fixed core iron 2 from the moving core iron 3.

[0015] Preferably, the fixing sleeve 1 is necked at the position of the fixed core iron 2 in order to better fix the fixed core iron 2. The fixing sleeve 1 and the fixed core iron 2 can be regarded as an integral structure.

[0016] The upper end surface of the moving core iron 3 is formed with an upper accommodating groove 31 opening upward. The upper accommodating groove 31 has an upper groove upper section 311 and an upper groove lower section 312.

[0017] The silencer 6 is made of non-metallic material. The silencer 6 surrounds the upper accommodating groove 31 and the return spring 4. The silencer 6 has a cylindrical portion 61 and a flange portion 62. The flange portion 62 is formed at the upper edge of the cylindrical portion 61. The flange portion 62 extends radially outward from the upper edge of the cylindrical portion 61. The cylindrical portion 61 is accommodated inside the lower section 312 of the upper groove of the accommodating groove 31. The flange portion 62 is accommodated inside the upper section 311 of the upper groove of the accommodating groove 31. The flange portion 62 has a certain thickness. When the flange portion 62 is accommodated inside the upper section 311 of the upper groove of the accommodating groove 31, the upper end surface of the flange portion 62 is higher than the upper end surface of the moving core iron 3. The two sections of the accommodating groove 31 are designed to reliably and conveniently fix the silencer 6 to the moving core iron 3. The purpose of configuring the silencer 6 is to play a silencing role and reduce the sound caused by the attraction between the fixed core iron 2 and the moving core iron 3. Even if the solenoid valve is frequently opened and closed, the impact on the environment is relatively limited. The working principle of the silencer 6: the fixed core iron 2 and the moving core iron 3 are attracted, and the fixed core iron 2 (metal material) is used to directly impact and contact with the silencer 6 (non-metal material), avoiding the direct impact and contact between the fixed core iron 2 (metal material) and the moving core iron 3 (metal material).

[0018] Preferably, the muffler 6 can be made of a gasket or a cushion sleeve made of PTFE+C (carbon fiber reinforced polytetrafluoroethylene). It has been verified that the muffler 6 made of PTFE+C has better muffler capability.

[0019] The lower end surface of the moving core iron 3 is formed with a lower accommodating groove 32 opening downward. The lower accommodating groove 32 contains a centering head 7, a gasket 8, a valve port sealing gasket 9 and a retaining ring 10. The centering head 7, the gasket 8, the valve port sealing gasket 9 and the retaining ring 10 are arranged from top to bottom. The lower end of the return spring 4 abuts against the centering head 7.

[0020] The above only expresses the implementation mode of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A low-noise solenoid valve core iron mechanism, comprising: The fixed core iron and the moving core iron below the fixed core iron are characterized in that an upper accommodating groove opening upward is formed on the upper end surface of the moving core iron, and the upper accommodating groove has an upper groove upper section and an upper groove lower section; it also includes: a silencer made of non-metallic material, the silencer has a cylindrical portion and a flange portion, the cylindrical portion is accommodated inside the lower section of the upper groove, the flange portion is accommodated inside the upper section of the upper groove, and the upper end surface of the flange portion is higher than the upper end surface of the moving core iron.

2. The low noise solenoid valve core iron mechanism according to claim 1, characterized in that: Further including: A fixed sleeve, a reset spring and an electromagnetic coil, wherein the fixed sleeve extends vertically, the upper end of the fixed sleeve is closed and the lower end is open, the fixed core iron and the moving core iron are arranged inside the fixed sleeve, the reset spring is arranged between the fixed core iron and the moving core iron, and the electromagnetic coil is arranged outside the fixed sleeve, and when the electromagnetic coil is energized, the fixed core iron and the moving core iron are attracted to each other.

3. The low noise solenoid valve core iron mechanism according to claim 1, characterized in that: The muffler may be made of carbon fiber reinforced polytetrafluoroethylene.

4. The low noise solenoid valve core iron mechanism according to claim 1, characterized in that: The inner diameter of the upper section of the upper groove is greater than the inner diameter of the lower section of the upper groove; the flange portion extends radially outward from the upper edge of the cylindrical portion.

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