High-corrosion-resistance plastic loose joint electromagnetic valve

Abstract

The utility model discloses a high anti-corrosion plastic loose joint electromagnetic valve which comprises a valve body, a valve cover fixed above the valve body in a sealing mode and an electromagnet assembly fixed above the valve cover in a sealing mode, a valve element is arranged between the valve body and the valve cover, and the valve body and the valve cover are both formed in an injection molding mode. An electromagnet of the electromagnet assembly is fixedly connected with the valve deck through a pilot head, an annular groove is formed in the top face of the valve deck, and a pilot head sealing piece is arranged in the annular groove. An upper O-shaped ring and a lower O-shaped ring are arranged on the valve cover, and a valve rod fixedly connected with a movable iron core of the electromagnet assembly penetrates through the O-shaped rings and is connected with the valve cover in a sliding and sealing mode. The valve cover and the valve body of the electromagnetic valve are formed through injection molding, the production cost can be effectively reduced, meanwhile, sealing rings of various forms are additionally arranged, the sealing performance can be greatly improved, the movable iron core is protected, and meanwhile the service life of the electromagnetic valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a highly corrosion-resistant plastic union solenoid valve. Background Technology

[0002] Existing solenoid valves typically use cast iron, brass, stainless steel, or other metal structures for the valve cover and body. To prevent fluid from contacting the moving iron core and spring, a seal is installed at this point as the valve stem and moving iron core reciprocate under electromagnetic force and spring reset. Conventionally, only one seal is used. However, with increasing frequency of movement and the effects of corrosive fluids, especially when the medium is gaseous or highly volatile, a small amount of medium inevitably seeps into the pilot head cavity, leading to corrosion of the moving iron core and other metals. In severe cases, this can cause the solenoid valve to fail. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a highly corrosion-resistant plastic union solenoid valve. The valve cover and valve body of this solenoid valve are injection molded, which can effectively reduce production costs. At the same time, various types of sealing rings are added, which can greatly improve the sealing performance, protect the moving iron core, and extend the service life of the solenoid valve.

[0004] A highly corrosion-resistant plastic live solenoid valve includes a valve body, a valve cover sealed and fixed above the valve body, and an electromagnet assembly sealed and fixed above the valve cover. A valve core is provided between the valve body and the valve cover. Both the valve body and the valve cover are injection molded. The electromagnet of the electromagnet assembly is fixedly connected to the valve cover via a pilot head. An annular groove is provided on the top surface of the valve cover, and a pilot head seal is provided in the annular groove. The valve cover is provided with two layers of O-rings. A valve rod fixedly connected to the moving iron core of the electromagnet assembly passes through the O-rings and is slidably and sealingly connected to the valve cover.

[0005] As a preferred embodiment of the above technical solution, a variable diameter section is provided inside the valve cover on the shaft hole through which the valve stem passes, and a pressure plate is provided on the top of the variable diameter section, with the O-ring located between the variable diameter section and the pressure plate.

[0006] As a preferred embodiment of the above technical solution, the top surface of the pressure plate is fixed and limited by the pilot head.

[0007] As a preferred embodiment of the above technical solution, the valve cover and the valve body are fixedly connected by multiple sets of bolt and nut assemblies.

[0008] As a preferred embodiment of the above technical solution, the pilot head is pressed against the bottom surface of the electromagnet by a fixing nut on the top of the electromagnet, and the pilot head is fixedly connected to the valve cover by multiple sets of screws.

[0009] As a preferred embodiment of the above technical solution, the valve stem and the valve core are fixedly connected, and a direct-acting structure is adopted.

[0010] As a preferred embodiment of the above technical solution, the valve stem and the valve core are separately disposed, and a pilot-operated structure is adopted.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The valve cover and valve body are injection molded, which greatly reduces the manufacturing cost of solenoid valves compared to the traditional cast iron form. In addition, the plastic has extremely strong corrosion resistance, which can improve the service life of solenoid valves.

[0013] 2. Multiple types of sealing rings are added, which can greatly improve the sealing performance, protect the moving iron core, and further extend the service life of the solenoid valve. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0015] Figure 2 This is a schematic diagram of the connection between the solenoid valve and the pipeline in Example 1.

[0016] Figure 3 This is a schematic diagram of the structure of Example 2.

[0017] Figure 4 This is a schematic diagram of the connection between the solenoid valve and the pipeline in Example 2.

[0018] The attached diagram is labeled as follows: 1-valve body, 2-valve cover, 3-valve core, 4-pilot head, 5-electromagnet, 6-annular groove, 7-pilot head seal, 8-O-ring, 9-moving iron core, 10-valve stem, 11-variable diameter section, 12-pressure plate, 13-bolt and nut assembly, 14-fixing nut, 15-screw. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Example 1

[0021] like Figure 1The diagram illustrates a highly corrosion-resistant plastic union solenoid valve, comprising a valve body 1, a valve cover 2 sealed and fixed above the valve body 1, and an electromagnet assembly sealed and fixed above the valve cover 2. A valve core 3 is provided between the valve body 1 and the valve cover 2. Both the valve body 1 and the valve cover 2 are injection molded. The electromagnet 5 of the electromagnet assembly is fixedly connected to the valve cover 2 via a pilot head 6. An annular groove 6 is provided on the top surface of the valve cover 2, and a pilot head seal 7 is provided within the annular groove 6. The valve cover 2 has two layers of O-rings 8, and a valve rod 10, fixedly connected to the moving iron core 9 of the electromagnet assembly, passes through the O-rings 8 and is slidably and sealingly connected to the valve cover 2. The union connection between the solenoid valve and the pipeline in this embodiment is as follows: Figure 2 As shown.

[0022] In this embodiment, a variable diameter section 11 is provided inside the valve cover 2 on the shaft hole through which the valve stem 10 passes, and a pressure plate 12 is provided on the top of the variable diameter section 11. The O-ring 8 is located between the variable diameter section 11 and the pressure plate 12.

[0023] In this embodiment, the top surface of the pressure plate 12 is fixed and limited by the pilot head 4.

[0024] In this embodiment, the valve cover 2 and the valve body 1 are fixedly connected by multiple sets of bolt and nut assemblies 13.

[0025] In this embodiment, the pilot head 4 is pressed against the bottom surface of the electromagnet 5 by the fixing nut 14 on the top of the electromagnet 5, and the pilot head 4 and the valve cover 2 are fixedly connected by multiple sets of screws 15.

[0026] In this embodiment, the valve stem 10 and the valve core 3 are fixedly connected, and a direct-acting structure is adopted.

[0027] Example 2

[0028] like Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the valve stem 10 and the valve core 3 are separately configured, adopting a pilot-operated structure. The connection between the solenoid valve and the pipeline in this embodiment is as follows... Figure 4 As shown.

[0029] The difference between the above two embodiments and existing solenoid valves is that the valve cover 2 and valve body 1 are injection molded, which can greatly reduce the manufacturing cost of the solenoid valve compared with the traditional cast iron form. In addition, the plastic has strong corrosion resistance, which can improve the service life of the solenoid valve. Various types of sealing rings are added, which can greatly improve the sealing performance, protect the moving iron core 9, and further improve the service life of the solenoid valve.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A highly corrosion-resistant plastic union solenoid valve, comprising a valve body, a valve cover sealed and fixed above the valve body, and an electromagnet assembly sealed and fixed above the valve cover, wherein a valve core is provided between the valve body and the valve cover, characterized in that: Both the valve body and the valve cover are injection molded. The electromagnet of the electromagnet assembly is fixedly connected to the valve cover via a pilot head. The top surface of the valve cover is provided with an annular groove, and a pilot head seal is provided in the annular groove. The valve cover is provided with two layers of O-rings, and the valve rod, which is fixedly connected to the moving iron core of the electromagnet assembly, passes through the O-rings and is slidably and sealingly connected to the valve cover.

2. The highly corrosion-resistant plastic union solenoid valve according to claim 1, characterized in that: The valve cover has a variable diameter section located in the shaft hole through which the valve stem passes. A pressure plate is provided on the top of the variable diameter section, and the O-ring is located between the variable diameter section and the pressure plate.

3. The highly corrosion-resistant plastic union solenoid valve according to claim 2, characterized in that: The top surface of the pressure plate is fixed and limited by the pilot head.

4. The highly corrosion-resistant plastic union solenoid valve according to claim 1, characterized in that: The valve cover and the valve body are fixedly connected by multiple sets of bolt and nut assemblies.

5. The highly corrosion-resistant plastic union solenoid valve according to claim 1, characterized in that: The pilot head is pressed against the bottom surface of the electromagnet by a fixing nut on the top of the electromagnet, and the pilot head is fixedly connected to the valve cover by multiple sets of screws.

6. The highly corrosion-resistant plastic union solenoid valve according to claim 1, characterized in that: The valve stem and the valve core are fixedly connected, and a direct-acting structure is adopted.

7. The highly corrosion-resistant plastic union solenoid valve according to claim 1, characterized in that: The valve stem and the valve core are separately configured, and a pilot-operated structure is adopted.

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