Solenoid valve anti-attrition structure

Abstract

The utility model discloses an anti-attrition structure of solenoid valve relates to solenoid valve technical field, including outer skeleton and steel ball, said outer skeleton is provided with lower guide sleeve inside, and lower guide sleeve is provided with outer magnetic core inside, and the inside center of outer magnetic core is vertically inserted with inner magnetic core, and the lower end surface of outer magnetic core is provided with the inner bore, and the steel ball is provided with the inner bore. The steel ball is arranged in the inner hole, a push rod assembly is installed at the bottom of the outer magnetic core, and the top of the outer magnetic core is connected with an upper guide sleeve. According to the anti-attrition structure of the electromagnetic valve, the six inner holes where the small steel balls can be assembled are formed in the surface of the outer magnetic core, the six steel balls capable of rolling are assembled in the six inner holes in a sealed mode, and when the outer magnetic core and the inner magnetic core conduct axial movement under the action of electromagnetic force in a magnetic field of the electromagnetic valve, the steel balls roll to serve as moving objects when the outer magnetic core and the guide sleeve conduct relative movement; friction force is greatly reduced, and therefore stable and reliable performance of the electromagnetic valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an anti-friction structure for a solenoid valve. Background Technique

[0002] A solenoid valve is an industrial device controlled by electricity. It is a basic automation component for controlling fluids and belongs to an actuator, not limited to hydraulic or pneumatic applications. It is used in industrial control systems to adjust parameters such as the direction, flow rate, speed, and others of the medium. The solenoid valve can cooperate with different circuits to achieve the expected control, and both the control accuracy and flexibility can be guaranteed. There are many types of solenoid valves, and different solenoid valves play roles in different positions of the control system. The most commonly used ones are check valves, safety valves, direction control valves, speed regulating valves, etc.

[0003] In the structural design of a common solenoid valve, during the working process, the magnetic core forms a sliding kinematic pair with the guide sleeve, so a relatively large frictional force will be generated, affecting the proportional characteristics of the working stroke and return stroke of the solenoid valve. In order to better reduce the surface friction coefficient of the magnetic core kinematic pair and the frictional force generated during the movement process, it is necessary to coat a lubricating and wear-resistant layer on the outer diameter of the magnetic core, which will greatly increase the manufacturing cost of the magnetic core.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an anti-friction structure for a solenoid valve is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-friction structure for a solenoid valve to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an anti-friction structure for a solenoid valve, including an outer skeleton and steel balls. The inside of the outer skeleton is provided with a lower guide sleeve, and the inside of the lower guide sleeve is provided with an outer magnetic core. Moreover, an inner magnetic core is vertically inserted in the center of the inside of the outer magnetic core. And an inner hole is opened on the lower surface of the outer magnetic core. The steel balls are arranged inside the inner hole. A push rod assembly is installed at the bottom of the outer magnetic core, and an upper guide sleeve is connected to the top of the outer magnetic core.

[0007] Further, a fixed connection is formed between the outer skeleton and the lower guide sleeve, and the outer magnetic core is vertically inserted in the center of the inside of the lower guide sleeve.

[0008] Further, the outer surface diameter of the lower guide sleeve is smaller than the inner surface diameter of the lower guide sleeve, and the sides of the steel balls are respectively in contact with the inner walls of the lower guide sleeve and the inner hole.

[0009] Further, the inner holes are arranged in a circular array with the inner magnetic core as the center on the lower surface of the outer magnetic core and there are six groups, and the steel balls are respectively installed inside the six groups of inner holes.

[0010] Furthermore, a fixed connection is formed between the outer magnetic core and the inner magnetic core, and the top end of the inner magnetic core is inserted into the center of the inner top of the upper guide sleeve.

[0011] Furthermore, the outer framework, the lower guide sleeve, the outer magnetic core, the inner magnetic core, the push rod assembly and the upper guide sleeve are all on the same vertical central axis, and one end of the push rod assembly is inserted into the inner hole.

[0012] Furthermore, the push rod assembly includes a connecting ring, a limiting push rod and an anchor pile. A limiting push rod is vertically connected to the top of the connecting ring, and an anchor pile is connected to the lower end of the limiting push rod.

[0013] Furthermore, the outer surface structure of the anchor pile matches the inner surface structure of the inner hole. The diameter of the limiting push rod is smaller than the inner diameter of the inner hole. The anchor pile and the limiting push rod are of an integral structure, and the limiting push rod is fixedly connected to the connecting ring.

[0014] The utility model provides a friction reduction structure for a solenoid valve, which has the following beneficial effects:

[0015] 1. In the utility model, cylindrical inner holes are equidistantly arranged on the lower surface of the outer magnetic core in a circular array. At the same time, due to the incomplete built-in structure of the inner holes, one side of the steel balls enclosed in the inner holes protrudes from the outer surface of the outer magnetic core. Therefore, when the outer magnetic core and the inner magnetic core are affected by electromagnetic force in the magnetic field of the solenoid valve and rotate axially at high speed, the steel balls in the inner holes will roll between the inner wall of the lower guide sleeve and the inner wall of the inner holes at the same time. Thus, the steel balls serve as spacer moving objects during the relative movement between the outer magnetic core and the lower guide sleeve, forming an auxiliary rolling structure like a bearing structure, greatly reducing the contact and friction between the outer surface of the outer magnetic core and the inner wall surface of the lower guide sleeve, thereby ensuring the stable and reliable performance of the solenoid valve. In addition, during the high-speed rotation of the outer magnetic core and the inner magnetic core, a certain degree of centrifugal force will be applied to the steel balls inside the inner holes, causing them to roll on the inner wall surface of the lower guide sleeve. While reducing the structural contact and friction, it will play a role in supporting the structure of the outer magnetic core inside the lower guide sleeve to ensure the stability of the rotation of the outer magnetic core inside the lower guide sleeve.

[0016] 2. In this utility model, since the rolling friction between the outer magnetic core and the lower guide sleeve provides effective structural support and effectively reduces the friction structure, considering that the steel balls themselves will rotate at high speed and there is structural friction, with the long-term use of this structure, the steel balls will inevitably suffer from structural loss, resulting in a certain degree of influence on their own low-friction effect and structural support effect. Therefore, a detachable push rod assembly is provided at the bottom of the outer magnetic core. Among them, six groups of limit push rods are respectively arranged on the surface of one end of the connecting ring corresponding to the structural position of the inner hole. After the push rod assembly and the outer magnetic core are structurally riveted, the steel balls can be enclosed inside the inner hole to avoid the problem of structural shedding. In addition, an anchor pile matching the inner surface structure of the inner hole is arranged at the lower end of the limit push rod, so that the entire push rod assembly can be inserted into the inner hole as tightly as possible, thereby ensuring the tightness of the structural docking. When necessary, only common external hardware tools are needed to push the push rod assembly out from the lower end of the outer magnetic core, and the worn steel balls in the six inner holes can be replaced in turn. Then, the structure of the push rod assembly is reset, and effective maintenance operations can be realized, effectively extending the service life of the outer magnetic core and the inner magnetic core. Brief Description of the Drawings

[0017] Figure 1 is a schematic cross-sectional structure view of the body of a friction-reducing structure of an electromagnetic valve according to this utility model;

[0018] Figure 2 is a schematic three-dimensional connection structure view of the outer magnetic core, steel balls and push rod assembly of a friction-reducing structure of an electromagnetic valve according to this utility model;

[0019] Figure 3 is a schematic three-dimensional structure view of the outer magnetic core and inner hole of a friction-reducing structure of an electromagnetic valve according to this utility model;

[0020] Figure 4 is a schematic three-dimensional structure view of the push rod assembly of a friction-reducing structure of an electromagnetic valve according to this utility model.

[0021] In the figure: 1. Outer skeleton; 2. Lower guide sleeve; 3. Outer magnetic core; 4. Inner magnetic core; 5. Inner hole; 6. Steel ball; 7. Push rod assembly; 701. Connecting ring; 702. Limit push rod; 703. Anchor pile; 8. Upper guide sleeve. Detailed Embodiment

[0022] The following further describes in detail the embodiments of this utility model in conjunction with the drawings and examples. The following examples are used to illustrate this utility model, but cannot be used to limit the scope of this utility model.

[0023] As Figures 1 to 4As shown in the figure, an anti-friction structure for a solenoid valve includes an outer skeleton 1 and steel balls 6. Inside the outer skeleton 1, a lower guide sleeve 2 is provided. Inside the lower guide sleeve 2, an outer magnetic core 3 is provided. Vertically inserted in the center of the inner part of the outer magnetic core 3 is an inner magnetic core 4. An inner hole 5 is formed on the lower surface of the outer magnetic core 3. The steel balls 6 are arranged inside the inner hole 5. A push rod assembly 7 is installed at the bottom of the outer magnetic core 3, and an upper guide sleeve 8 is connected to the top of the outer magnetic core 3. The outer skeleton 1 and the lower guide sleeve 2 are fixedly connected. The outer magnetic core 3 is vertically inserted in the center of the inner part of the lower guide sleeve 2. The outer surface diameter of the lower guide sleeve 2 is smaller than the inner surface diameter of the lower guide sleeve 2. The sides of the steel balls 6 are respectively in contact with the inner walls of the lower guide sleeve 2 and the inner hole 5. The inner holes 5 are arranged in a circular array centered on the inner magnetic core 4 on the lower surface of the outer magnetic core 3 and there are six groups. The steel balls 6 are respectively installed inside the six groups of inner holes 5. The outer magnetic core 3 and the inner magnetic core 4 are fixedly connected. The top of the inner magnetic core 4 is inserted into the center of the top inside the upper guide sleeve 8. When the outer magnetic core 3 and the inner magnetic core 4 are under the action of electromagnetic force in the magnetic field of the solenoid valve and rotate axially at high speed, at this time, the steel balls 6 inside the inner hole 5 will roll between the inner wall of the lower guide sleeve 2 and the inner wall of the inner hole 5 at the same time. Thus, the steel balls 6 serve as spacer moving objects when the outer magnetic core 3 and the lower guide sleeve 2 have relative movement, forming an auxiliary rolling structure like a bearing structure, greatly reducing the contact and friction between the outer surface of the outer magnetic core 3 and the inner wall surface of the lower guide sleeve 2.

[0024] As Figures 1 to 4 As shown in the figure, the outer skeleton 1, the lower guide sleeve 2, the outer magnetic core 3, the inner magnetic core 4, the push rod assembly 7, and the upper guide sleeve 8 are all on the same vertical central axis. One end of the push rod assembly 7 is inserted into the inner hole 5. The push rod assembly 7 includes a connecting ring 701, a limiting push rod 702, and an anchor pile 703. The top of the connecting ring 701 is vertically connected to the limiting push rod 702. The lower end of the limiting push rod 702 is connected to the anchor pile 703. The outer surface structure of the anchor pile 703 matches the inner surface structure of the inner hole 5. The diameter of the limiting push rod 702 is smaller than the inner diameter of the inner hole 5. The anchor pile 703 and the limiting push rod 702 are of an integral structure. The limiting push rod 702 and the connecting ring 701 are fixedly connected to each other. By providing a detachable push rod assembly 7 at the bottom of the outer magnetic core 3, and by providing six groups of limiting push rods 702 on one end surface of the connecting ring 701 corresponding to the structural positions of the inner holes 5 respectively, after the push rod assembly 7 and the outer magnetic core 3 are structurally riveted, the steel balls 6 can be enclosed inside the inner holes 5, avoiding the problem of structural detachment. In addition, by providing an anchor pile 703 at the lower end of the limiting push rod 702 whose outer surface structure matches the inner surface structure of the inner hole 5, the whole push rod assembly 7 can be inserted into the inner hole 5 as tightly as possible, thus ensuring the tightness of the structural docking.

[0025] In summary, as Figures 1 to 4As shown, for the anti-friction structure of the solenoid valve, during use, first, six steel balls 6 are sequentially placed into the inner hole 5 of the lower end surface of the outer magnetic core 3 from the opening of the inner hole 5. Subsequently, the side of the connecting ring 701 provided with the limit push rod 702 is inserted towards the opening of the inner hole 5 at the lower end of the outer magnetic core 3 until the anchor pile 703 at the lower end of the limit push rod 702 is completely inserted into the inner hole 5, thereby ensuring the tight connection between the push rod assembly 7 and the outer magnetic core 3 and encapsulating the steel balls 6 in the inner hole 5.

[0026] When the entire solenoid valve is activated, the outer magnetic core 3 and the inner magnetic core 4 are subjected to electromagnetic forces in the magnetic field of the solenoid valve and start axial rotation between the lower guide sleeve 2 and the upper guide sleeve 8, and the rotation speed gradually increases. At this time, with the high-speed rotation of the outer magnetic core 3 and the inner magnetic core 4, the steel balls 6 will perform synchronous high-speed rolling friction between the inner hole 5 and the inner wall surface of the lower guide sleeve 2, and under the action of centrifugal force, provide effective structural support for the outer magnetic core 3 inside the lower guide sleeve 2 and minimize the friction during the structural rotation to the greatest extent, thereby ensuring the stable performance of the solenoid valve.

[0027] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A solenoid valve friction reduction structure, comprising an outer frame (1) and a steel ball (6), characterized in that: A lower guide sleeve (2) is arranged inside the outer frame (1), and an outer magnetic core (3) is arranged inside the lower guide sleeve (2), and an inner magnetic core (4) is vertically inserted in the center of the outer magnetic core (3), and an inner hole (5) is opened on the lower end surface of the outer magnetic core (3), and the steel ball (6) is arranged inside the inner hole (5), a push rod assembly (7) is installed at the bottom of the outer magnetic core (3), and an upper guide sleeve (8) is connected to the top of the outer magnetic core (3).

2. A solenoid valve friction reduction structure according to claim 1, characterized in that: The outer frame (1) is fixedly connected to the lower guide sleeve (2), and the outer magnetic core (3) is vertically inserted into the inner center of the lower guide sleeve (2).

3. The solenoid valve friction reduction structure according to claim 1, characterized in that: The outer surface diameter of the lower guide sleeve (2) is smaller than the inner surface diameter of the lower guide sleeve (2), and the side edges of the steel ball (6) are respectively in contact with the inner wall of the lower guide sleeve (2) and the inner hole (5).

4. The solenoid valve friction reduction structure according to claim 1, characterized in that: The inner holes (5) are arranged in a circular array on the lower end surface of the outer magnetic core (3) with the inner magnetic core (4) as the center, and six groups are provided, and the steel balls (6) are respectively installed inside the six groups of inner holes (5).

5. The solenoid valve friction reduction structure according to claim 1, characterized in that: The outer magnetic core (3) and the inner magnetic core (4) are fixedly connected, and the top end of the inner magnetic core (4) is inserted into the center of the top end inside the upper guide sleeve (8).

6. The solenoid valve friction reduction structure according to claim 1, characterized in that: The outer frame (1), the lower guide sleeve (2), the outer magnetic core (3), the inner magnetic core (4), the push rod assembly (7) and the upper guide sleeve (8) are all located on the same vertical central axis, and one end of the push rod assembly (7) is inserted into the inner hole (5).

7. The solenoid valve friction reduction structure according to claim 1, characterized in that: The push rod assembly (7) comprises a connecting ring (701), a limiting push rod (702) and an anchor pile (703); the top of the connecting ring (701) is vertically connected to the limiting push rod (702), and the lower end of the limiting push rod (702) is connected to the anchor pile (703).

8. The solenoid valve friction reduction structure according to claim 7, characterized in that: The outer surface structure of the anchor pile (703) matches the inner surface structure of the inner hole (5), and the diameter of the limiting push rod (702) is smaller than the inner diameter of the inner hole (5). The anchor pile (703) and the limiting push rod (702) adopt an integrated structure, and the limiting push rod (702) and the connecting ring (701) are fixedly connected to each other.

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