Proportional electromagnetic valve

Abstract

The utility model belongs to the technical field of electromagnetic valves, and particularly relates to a proportional electromagnetic valve which comprises a valve cover, a fixed iron core is arranged in the valve cover, a movable iron core is arranged at the bottom end of the fixed iron core, a spring seat is arranged on the top face of the movable iron core, a reset spring is arranged on the top face of the spring seat, the reset spring is a conical spring, and the movable iron core is arranged on the valve cover. The reset spring is arranged on the inner side of the fixed iron core; the movable iron core is arranged to be of a split structure, the balance ring is additionally arranged, the movable iron core and the valve body are convenient to install while the weight is not increased and the flow is not affected, the conical spring is used as a reset spring, large loads can be borne, vibration is reduced, better stability is achieved, meanwhile, the coil framework made of PEEK has extremely high heat stability, and the service life of the valve is prolonged. And influence on normal movement of the movable iron core due to thermal deformation of the thin-wall part, gap change and influence on normal movement of the movable iron core caused by heating of the copper wire after electric conduction can be effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of solenoid valves, and in particular relates to a proportional solenoid valve. Background Art

[0002] A proportional solenoid valve is a new type of hydraulic control device that can adjust the valve opening according to changes in the input signal. Unlike traditional on-off solenoid valves, proportional solenoid valves can accurately adjust the flow, pressure, or position of the fluid. They are widely used in automation systems that require precise control. In existing technologies, the movable iron core of proportional solenoid valves is usually an integrated structure, which makes it inconvenient to assemble the movable iron core and valve seat.

[0003] In order to solve the above problems, a proportional solenoid valve is proposed in this application. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a proportional solenoid valve, which has the characteristic of being easy to assemble.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a proportional solenoid valve comprises a valve cover, wherein a fixed iron core is provided in the valve cover, a moving iron core is provided at the bottom of the fixed iron core, a spring seat is provided on the top surface of the moving iron core, a return spring is provided on the top surface of the spring seat, the return spring is configured as a conical spring, the return spring is arranged on the inner side of the fixed iron core, a guide rod is provided in the return spring, the guide rod and the moving iron core are connected by an interference fit, the top of the guide rod is arranged on the inner side of the fixed iron core, the bottom end of the valve cover is mounted on the valve body, a valve seat is provided on the top of the valve body, the valve seat and the valve body are connected by an interference fit, a sealing assembly is provided on the top of the valve seat, the sealing ring of the sealing assembly is arranged in the inner groove of the valve seat, the top of the sealing assembly is arranged in the connecting groove at the bottom of the moving iron core, a balancing ring is provided at the outer position of the top of the sealing assembly, an O-ring is provided on the top surface of the balancing ring, and the O-ring is arranged between the moving iron core and the balancing ring.

[0006] As a preferred proportional solenoid valve of the present invention, a magnetic isolation sleeve is provided on the inner side of the valve cover, the fixed iron core and the moving iron core are both provided on the inner side of the magnetic isolation sleeve, the valve cover is provided with a flexible material, and the valve cover is connected to the magnetic isolation sleeve and the fixed iron core through cooling crystallization plasticity.

[0007] As a preferred proportional solenoid valve of the present invention, an internal thread is provided at the top position of the inner wall of the fixed iron core, an adjusting bolt assembly is provided at the top position of the inner side of the fixed iron core, an external thread is provided on the outer wall of the adjusting bolt assembly, and the adjusting bolt assembly is threadedly connected to the fixed iron core.

[0008] As a preferred embodiment of the proportional solenoid valve of the present invention, a power connection assembly is provided on either side of the valve cover.

[0009] As a preferred embodiment of the proportional solenoid valve of the present invention, the coil skeleton of the fixed iron core is set to be made of PEEK material.

[0010] As a preferred embodiment of the proportional solenoid valve of the present invention, the interior of the sealing component is set to EPDM material, and both ends of the valve body are provided with internal threads.

[0011] Compared with the prior art, the beneficial effects of the present invention are: by setting the moving iron core as a split structure and adding a balancing ring, the installation of the moving iron core and the valve body is facilitated without increasing the weight or affecting the flow rate, and a conical spring is used as a return spring, which can withstand a large load and reduce vibration and has better stability. At the same time, the coil skeleton made of PEEK material has extremely high thermal stability, which can effectively prevent the thin-walled parts from being deformed by heat due to heat after the copper wire is conductive, changing the gap, and affecting the normal movement of the moving iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 For this utility model Figure 2 Enlarged view of part A;

[0016] Figure 4 For this utility model Figure 2 Enlarged view of part B;

[0017] Figure 5 For this utility model Figure 1 Schematic diagram of the local structure;

[0018] In the picture:

[0019] 1. Valve cover; 2. Fixed iron core; 3. Moving iron core; 4. Guide rod; 5. Spring seat; 6. Return spring; 7. Balance ring; 8. O-ring; 9. Magnetic isolation sleeve; 10. Adjusting bolt assembly; 11. Power connection assembly; 12. Valve body; 13. Valve seat; 14. Sealing assembly. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1

[0022] like Figures 1 to 5 As shown;

[0023] Combining the above:

[0024] In order to facilitate the assembly of the solenoid valve, this proportional solenoid valve includes a valve cover 1, a fixed iron core 2 is provided in the valve cover 1, a moving iron core 3 is provided at the bottom end of the fixed iron core 2, a spring seat 5 is provided on the top surface of the moving iron core 3, a return spring 6 is provided on the top surface of the spring seat 5, the return spring 6 is provided in a conical spring, the return spring 6 is provided on the inner side of the fixed iron core 2, a guide rod 4 is provided in the return spring 6, the guide rod 4 is connected to the moving iron core 3 by an interference fit, the top end of the guide rod 4 is provided on the inner side of the fixed iron core 2, a valve body 12 is installed at the bottom end of the valve cover 1, and the top of the valve body 12 A valve seat 13 is provided at the end, and the valve seat 13 is connected to the valve body 12 by an interference fit. A sealing assembly 14 is provided on the top of the valve seat 13, and the sealing ring of the sealing assembly 14 is provided in the inner groove of the valve seat 13. The top of the sealing assembly 14 is provided in the connecting groove at the bottom of the moving iron core 3. A balancing ring 7 is provided at the outer position of the top of the sealing assembly 14, and an O-ring 8 is provided on the top surface of the balancing ring 7. The O-ring 8 is provided between the moving iron core 3 and the balancing ring 7. The interior of the sealing assembly 14 is set to EPDM material, and internal threads are provided at both ends of the valve body 12.

[0025] In this embodiment, when assembling the solenoid valve, first insert the guide rod 4 into the inner side of the fixed iron core 2, and place the return spring 6 on the outer side of the guide rod 4, then put the spring seat 5 on the guide rod 4 so that the spring seat 5 contacts the return spring 6, then put the moving iron core 3 into the valve cover 1, so that the guide rod 4 is connected to the moving iron core 3 through an interference fit, then install the valve seat 13 on the valve body 12, and install the sealing assembly 14 on the valve seat 13 so that the sealing ring of the sealing assembly 14 is embedded in the inner groove of the valve seat 13, then place the balancing ring 7 on the sealing assembly 14, and place the O-ring 8 on the balancing ring 7, and then the valve body can be bolted. 12 is fixedly connected to the valve cover 1, so that the balancing ring 7 is compressed between the O-ring 8 and the sealing assembly 14, and the O-ring 8 is compressed between the balancing ring 7 and the moving iron core 3, thereby completing the assembly of the solenoid valve. By setting the moving iron core 3 as a split structure and adding the balancing ring 7, the moving iron core 3 and the valve body 12 are conveniently installed without increasing the weight or affecting the flow rate. A conical spring is used as the return spring 6, which can withstand larger loads and vibration reduction and has better stability. At the same time, the EPDM material has excellent elasticity and flexibility, which can make the sealing assembly 14 work in conjunction with the nozzle of the valve seat 13.

[0026] Going further:

[0027] In an optional embodiment, a magnetic isolation sleeve 9 is provided on the inner side of the valve cover 1, and the fixed iron core 2 and the moving iron core 3 are both provided on the inner side of the magnetic isolation sleeve 9. The valve cover 1 is set to a flexible material, and the valve cover 1 is connected to the magnetic isolation sleeve 9 and the fixed iron core 2 through cooling crystallization plasticity. An internal thread is provided at the top position of the inner wall of the fixed iron core 2, and an adjusting bolt assembly 10 is provided at the top position of the inner side of the fixed iron core 2. An external thread is provided on the outer wall of the adjusting bolt assembly 10, and the adjusting bolt assembly 10 is threadedly connected to the fixed iron core 2.

[0028] In this embodiment: the magnetic isolation sleeve 9 is used to shield the strong magnetic field generated when the solenoid valve is working to reduce interference with other electrical components. By using the adjusting bolt assembly 10, the moving stroke of the moving iron core 3 can be adjusted, thereby realizing the proportional adjustment function of the electromagnet.

[0029] Going further:

[0030] In an optional embodiment, a power connection assembly 11 is provided on either side of the valve cover 1 .

[0031] In this embodiment, the power connection assembly 11 is used to connect the solenoid valve to a power source.

[0032] Going further:

[0033] In an optional embodiment, the coil skeleton of the fixed iron core 2 is set to be made of PEEK material.

[0034] In this embodiment, the PEEK material has extremely high thermal stability, which can effectively prevent the thin-walled parts from being deformed by heat caused by the heat generated by the copper wire after conduction, thereby changing the gap and affecting the normal movement of the iron core.

[0035] The working principle and usage process of the present invention are as follows: when assembling the solenoid valve, first insert the guide rod 4 into the inner side of the fixed iron core 2, and place the reset spring 6 on the outer side of the guide rod 4, then put the spring seat 5 on the guide rod 4 so that the spring seat 5 contacts the reset spring 6, then put the moving iron core 3 into the valve cover 1, so that the guide rod 4 is connected to the moving iron core 3 through an interference fit, then install the valve seat 13 on the valve body 12, and install the sealing assembly 14 on the valve seat 13 so that the sealing ring of the sealing assembly 14 is embedded in the inner groove of the valve seat 13, then place the balancing ring 7 on the sealing assembly 14, and place the O-ring 8 on the balancing ring 7, then use bolts to fix the valve body 12 and the valve cover 1 so that the balancing ring 7 is pressed tightly against the O-ring 8 Between the O-ring 8 and the sealing component 14, the O-ring 8 is pressed between the balance ring 7 and the moving iron core 3, thereby completing the assembly of the solenoid valve. By setting the moving iron core 3 as a split structure and adding the balance ring 7, the installation of the moving iron core 3 and the valve body 12 is facilitated without increasing the weight or affecting the flow. When in use, the solenoid valve is powered on through the power connection component 11, so that the fixed iron core 2 generates magnetic force after power is turned on and drives the guide rod 4 to move, so that the guide rod 4 drives the moving iron core 3 to move, thereby causing the moving iron core 3 to drive the sealing component 14 to move, so that the two ends of the valve body 12 become connected, and the moving stroke of the moving iron core 3 can be adjusted by using the adjusting bolt assembly 10, thereby realizing the proportional adjustment function of the electromagnet.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A proportional solenoid valve, comprising a valve cover (1), characterized in that: The valve cover (1) is provided with a fixed iron core (2), the bottom end of the fixed iron core (2) is provided with a moving iron core (3), the top surface of the moving iron core (3) is provided with a spring seat (5), the top surface of the spring seat (5) is provided with a return spring (6), the return spring (6) is provided with a conical spring, the return spring (6) is provided on the inner side of the fixed iron core (2), a guide rod (4) is provided in the return spring (6), the guide rod (4) is connected to the moving iron core (3) by an interference fit, the top end of the guide rod (4) is provided on the inner side of the fixed iron core (2), and the bottom end of the valve cover (1) is provided with a valve body (12) ), a valve seat (13) is provided at the top of the valve body (12), the valve seat (13) and the valve body (12) are connected by interference fit, a sealing assembly (14) is provided at the top of the valve seat (13), the sealing ring of the sealing assembly (14) is provided in the inner groove of the valve seat (13), the top of the sealing assembly (14) is provided in the connecting groove at the bottom of the moving iron core (3), a balancing ring (7) is provided at the outer position of the top of the sealing assembly (14), an O-type sealing ring (8) is provided on the top surface of the balancing ring (7), and the O-type sealing ring (8) is provided between the moving iron core (3) and the balancing ring (7).

2. The proportional solenoid valve according to claim 1, characterized in that: A magnetic isolation sleeve (9) is provided on the inner side of the valve cover (1), the fixed iron core (2) and the movable iron core (3) are both provided on the inner side of the magnetic isolation sleeve (9), the valve cover (1) is provided with a flexible material, and the valve cover (1) is connected to the magnetic isolation sleeve (9) and the fixed iron core (2) through cooling crystallization plasticity.

3. The proportional solenoid valve according to claim 1, characterized in that: An internal thread is provided at the top position of the inner wall of the fixed iron core (2), an adjusting bolt assembly (10) is provided at the top position of the inner side of the fixed iron core (2), an external thread is provided on the outer wall of the adjusting bolt assembly (10), and the adjusting bolt assembly (10) is threadedly connected to the fixed iron core (2).

4. The proportional solenoid valve according to claim 1, characterized in that: A power connection assembly (11) is provided on either side of the valve cover (1).

5. The proportional solenoid valve according to claim 1, characterized in that: The coil skeleton of the fixed iron core (2) is configured to be made of PEEK material.

6. The proportional solenoid valve according to claim 1, characterized in that: The interior of the sealing component (14) is made of EPDM material, and both ends of the valve body (12) are provided with internal threads.

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