Isolated corrosion-proof electromagnetic valve

Abstract

The application discloses an isolated anticorrosion electromagnetic valve, which comprises a valve body and a valve cover arranged on the top of the valve body, the inner side of the valve cover is provided with a magnetic isolation pipe assembly, a coil, a core spring, a pressing plate and an isolated diaphragm assembly, the magnetic isolation pipe assembly is arranged on the top of the isolated diaphragm assembly, and the core spring is arranged between the magnetic isolation pipe assembly and the isolated diaphragm assembly; the fluid only contacts the PTFE material diaphragm and a valve port sealing element, the structure is truly corrosion resistant, the PTFE material diaphragm is processed into a corrugated structure, the PTFE material diaphragm has a structure similar to a spring, the PTFE has good ductility, the PTFE material diaphragm is not easy to break and can reduce the core compression area, thereby reducing the spring force and the coil power, so that the electromagnetic valve can normally work by using a weak spring and a small power coil, the electromagnetic valve volume is relatively reduced, and the flow is relatively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of corrosion-proof electromagnetic valves, and particularly relates to an isolated corrosion-proof electromagnetic valve. BACKGROUND

[0002] The corrosion-proof electromagnetic valve is suitable for various strong acid and strong alkali gas-liquid bodies as working medium, and is widely applied to automatic control systems of medical treatment, pharmacy, chemical industry, environmental protection or cleaning equipment as a medium pipeline on-off.

[0003] At present, the structure of the corrosion-proof electromagnetic valve in the electromagnetic valve industry is generally direct-acting or distributed direct-acting piston type. The sealing isolation of the two structures between the corrosive fluid and the metal parts (soft magnetic core, stainless steel magnetic isolation pipe and spring) is achieved by using an O-shaped ring seal. The O-shaped ring seal is easy to be blocked and worn by particulate matter, precipitate or crystalline substances in the fluid, resulting in a loose seal, contact between the corrosive fluid and the metal parts, electromagnetic valve failure, leakage of corrosive fluid and safety hazards. Moreover, the conventional corrosion-proof electromagnetic valve needs a strong spring and a high-power coil to enable the electromagnetic valve to work normally because it is an isolated structure, resulting in relatively increased volume of the electromagnetic valve, reduced application range and relatively reduced flow. Therefore, the application provides an isolated corrosion-proof electromagnetic valve. SUMMARY

[0004] The application aims to provide an isolated corrosion-proof electromagnetic valve to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: an isolated corrosion-proof electromagnetic valve, comprising a valve body and a valve cover arranged at the top of the valve body, the inner side of the valve cover is provided with a magnetic isolation pipe assembly, a coil, a core spring, a pressing plate and an isolated diaphragm assembly, the magnetic isolation pipe assembly is arranged at the top of the isolated diaphragm assembly, and the core spring is arranged between the magnetic isolation pipe assembly and the isolated diaphragm assembly, the bottom end of the isolated diaphragm assembly is arranged in the interior of the valve body, the coil is sleeved on the magnetic isolation pipe assembly and the isolated diaphragm assembly, the pressing plate is between the coil and the valve body, and the pressing plate is sleeved on the isolated diaphragm assembly, the isolated diaphragm assembly comprises a movable core, a pressing ring, a PTFE material diaphragm and a valve port sealing element, the pressing ring and the PTFE material diaphragm are both sleeved on the bottom end surface of the movable core, and the pressing ring is at the top of the PTFE material diaphragm, the valve port sealing element is sleeved on the bottom end of the PTFE material diaphragm, and the bottom end of the movable core is threadedly connected with the PTFE material diaphragm.

[0006] Preferably, a cylindrical groove corresponding to the core spring is formed in the top end of the movable core, and the core spring is in the cylindrical groove, and the top end of the core spring extends to the top of the movable core and contacts the magnetic isolation pipe assembly.

[0007] Preferably, the top of the valve cover is provided with a locking screw and a gasket, the gasket is sleeved on the surface of the locking screw, and the bottom end of the locking screw is screwed into the inside of the valve cover and is in threaded connection with the magnetic isolation pipe assembly.

[0008] Preferably, the top of the valve cover is provided with a locking screw and a gasket, the gasket is sleeved on the surface of the locking screw, and the bottom end of the locking screw is screwed into the inside of the valve cover and is in threaded connection with the magnetic isolation pipe assembly.

[0009] Preferably, the bottom of the valve body is provided with a bottom plate, a plurality of mounting screws are arranged at the edge of the bottom plate in a penetrating mode, and the bottom plate is fixed to the valve body through the mounting screws.

[0010] Preferably, the two sides of the valve body are respectively provided with a first valve port and a second valve port, the first valve port is in communication with the inside of the valve body, the bottom end of the second valve port is provided with an L-shaped channel in communication with the inside of the valve body, and the valve port sealing piece is located at the top of the L-shaped channel.

[0011] Compared with the prior art, the beneficial effects of the present application are as follows: the fluid of the present application only contacts the PTFE material diaphragm and the valve port sealing piece, and the structure is truly corrosion-resistant. The PTFE material diaphragm is processed into a corrugated structure, so that the PTFE material diaphragm has a structure similar to a spring. The PTFE material diaphragm has good ductility, is not easy to break, and can reduce the compression area of the iron core, thereby reducing the spring force and the coil power. Therefore, a weaker spring and a smaller power coil can be used to make the electromagnetic valve work normally, the volume of the electromagnetic valve is relatively reduced, the flow is relatively increased, the use range is expanded, and the cost of the electromagnetic valve is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present application;

[0013] Figure 2 It is a schematic diagram of the isolation type diaphragm assembly of the present application;

[0014] In the figure: 1, movable iron core; 2, compression ring; 3, PTFE material diaphragm; 4, valve port sealing piece; 5, locking screw; 6, gasket; 7, magnetic isolation pipe assembly; 8, coil; 9, iron core spring; 10, compression plate; 11, isolation type diaphragm assembly; 12, valve body; 13, bottom plate; 14, mounting screw. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] Embodiment

[0017] Please refer to Figure 1 and Figure 2 , the application provides a technical scheme: a kind of isolated anticorrosion electromagnetic valve, including valve body 12 and the valve cover being arranged at the top of valve body 12, the inside of valve cover is provided with magnetic isolation pipe assembly 7, coil 8, iron core spring 9, pressing plate 10 and isolated diaphragm assembly 11, magnetic isolation pipe assembly 7 is arranged at the top of isolated diaphragm assembly 11, and iron core spring 9 is arranged between magnetic isolation pipe assembly 7 and isolated diaphragm assembly 11, the bottom end of isolated diaphragm assembly 11 is arranged in the inside of valve body 12, coil 8 is sleeved on magnetic isolation pipe assembly 7 and isolated diaphragm assembly 11, pressing plate 10 is between coil 8 and valve body 12, and pressing plate 10 is sleeved on isolated diaphragm assembly 11, isolated diaphragm assembly 11 includes movable iron core 1, pressing ring 2, PTFE material diaphragm 3 and valve port seal 4, pressing ring 2 and PTFE material diaphragm 3 are all sleeved on the bottom end surface of movable iron core 1, and pressing ring 2 is at the top of PTFE material diaphragm 3, valve port seal 4 is sleeved on the bottom end of PTFE material diaphragm 3, the bottom end of movable iron core 1 is threadedly connected with PTFE material diaphragm 3, valve body 12 is made of polytetrafluoroethylene material, PTFE material diaphragm 3 is made of polytetrafluoroethylene material, valve port seal 4 is made of perfluorinated rubber material, corrosive fluid is completely isolated from metal parts, i.e. fluid only contacts PTFE material diaphragm 3 and valve port seal 4, realizes the true corrosion resistance in structure, PTFE material diaphragm 3 is processed and produced using polytetrafluoroethylene, and a corrugated structure is designed, so that it has a similar spring expansion function, so it is easy to reciprocate up and down, and the size of the driving rod passing through PTFE material diaphragm 3 is small, the pressure acting on the top rod is reduced, the spring force is reduced, the coil 8 appearance and power can also be reduced, the cost is relatively reduced, the overall volume of the electromagnetic valve is also relatively reduced, the flow is also relatively increased, the use range is expanded, and the cost of the electromagnetic valve is reduced.

[0018] In the embodiment, preferably, the top end of the movable iron core 1 is provided with a cylindrical groove corresponding to the iron core spring 9, and the iron core spring 9 is located in the cylindrical groove, and the top end of the iron core spring 9 protrudes to the top of the movable iron core 1 and contacts the magnetic isolation pipe assembly 7.

[0019] In the embodiment, preferably, the top of the valve cover is provided with a locking screw 5 and a gasket 6, and the gasket 6 is sleeved on the surface of the locking screw 5, and the bottom end of the locking screw 5 penetrates into the inside of the valve cover and is threadedly connected with the magnetic isolation pipe assembly 7, for fixed installation of the valve cover, and the top of the valve cover is provided with a through hole corresponding to the locking screw 5, and the top end of the magnetic isolation pipe assembly 7 is provided with a threaded groove corresponding to the locking screw 5.

[0020] In the embodiment, preferably, the bottom of the valve body 12 is provided with a bottom plate 13, a plurality of mounting screws 14 are arranged through the edge of the bottom plate 13, and the bottom plate 13 is fixed with the valve body 12 through the mounting screws 14, for fixed mounting of the bottom plate 13.

[0021] In the embodiment, preferably, the two sides of the valve body 12 are respectively provided with a first valve port and a second valve port, the first valve port is communicated with the inside of the valve body 12, the bottom end of the second valve port is provided with an L-shaped channel communicated with the inside of the valve body 12, and the valve port sealing piece 4 is located at the top of the L-shaped channel.

[0022] The working principle and use process of the application are as follows: when the isolation type corrosion-proof electromagnetic valve is assembled, the isolation type diaphragm assembly 11 is first assembled, when the isolation type diaphragm assembly 11 is assembled, the movable iron core 1 is first inserted into the pressing ring 2, then the movable iron core 1 with self-tapping threads is rotated into the inside of the PTFE material diaphragm 3 by using a tool, then the valve port sealing piece 4 is sleeved on the PTFE material diaphragm 3, so that the movable iron core 1, the pressing ring 2, the PTFE material diaphragm 3 and the valve port sealing piece 4 are coaxially distributed, then the assembled isolation type diaphragm assembly 11 is combined with the isolation type diaphragm assembly 7, the iron core spring 9, the pressing plate 10, the valve body 12 and the bottom plate 13, and locked by the mounting screw 14, then the coil 8, the valve cover, the gasket 6 and the locking screw 5 are sequentially loaded, then the locking screw 5 is locked by using a tool, the installation of the valve cover is completed, and the assembly of the isolation type corrosion-proof electromagnetic valve is completed, since the threads of the movable iron core 1 lock the lower end part of the PTFE material diaphragm 3, when the movable iron core 1 moves upward in the subsequent operation of the isolation type corrosion-proof electromagnetic valve, the lower end part of the PTFE material diaphragm 3 also moves upward, thereby driving the valve port sealing piece 4 to move upward, so that the valve port sealing piece 4 no longer blocks the L-shaped channel, thereby realizing the connection between the two valve ports, and the valve port of the electromagnetic valve can be smoothly opened.

[0023] Although the embodiments of the application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of the application being defined by the appended claims and their equivalents.

Claims

1. An isolation-type corrosion-resistant solenoid valve, comprising a valve body (12) and a valve cover disposed on the top of the valve body (12), characterized in that: The inner side of the valve cover is provided with a magnetic shielding tube assembly (7), a coil (8), an iron core spring (9), a pressure plate (10), and an isolation diaphragm assembly (11). The magnetic shielding tube assembly (7) is located on top of the isolation diaphragm assembly (11), and the iron core spring (9) is located between the magnetic shielding tube assembly (7) and the isolation diaphragm assembly (11). The bottom end of the isolation diaphragm assembly (11) is located inside the valve body (12). The coil (8) is sleeved on the magnetic shielding tube assembly (7) and the isolation diaphragm assembly (11). The pressure plate (10) is located between the coil (8) and the valve body (12). Between, and the pressure plate (10) is sleeved on the isolation diaphragm assembly (11), the isolation diaphragm assembly (11) includes a movable iron core (1), a pressure ring (2), a corrugated PTFE material diaphragm (3) and a valve port seal (4), the pressure ring (2) and the PTFE material diaphragm (3) are both sleeved on the bottom surface of the movable iron core (1), and the pressure ring (2) is at the top of the PTFE material diaphragm (3), the valve port seal (4) is sleeved on the bottom end of the PTFE material diaphragm (3), and the bottom end of the movable iron core (1) is threadedly connected to the PTFE material diaphragm (3); The top of the movable iron core (1) is provided with a cylindrical groove corresponding to the iron core spring (9), and the iron core spring (9) is located in the cylindrical groove. The top of the iron core spring (9) extends to the top of the movable iron core (1) and contacts the magnetic shielding tube assembly (7). The valve body (12) is made of polytetrafluoroethylene, the PTFE diaphragm (3) is made of polytetrafluoroethylene, and the valve port seal (4) is made of perfluororubber. Corrosive fluids are completely isolated from metal parts, that is, the fluids only come into contact with the PTFE diaphragm (3) and the valve port seal (4), thus achieving true corrosion resistance in the structure. The PTFE membrane (3) has a spring-like extension and retraction function, which makes it easy to move up and down.

2. The isolation-type corrosion-resistant solenoid valve according to claim 1, characterized in that: The valve cover is provided with a locking screw (5) and a washer (6) on the top, and the washer (6) is fitted on the surface of the locking screw (5). The bottom end of the locking screw (5) extends through to the inside of the valve cover and is threadedly connected to the magnetic shielding tube assembly (7).

3. The isolation-type corrosion-resistant solenoid valve according to claim 2, characterized in that: The valve cover has a through hole corresponding to the locking screw (5) at its top, and the magnetic shielding tube assembly (7) has a threaded groove corresponding to the locking screw (5) at its top.

4. The isolation-type corrosion-resistant solenoid valve according to claim 1, characterized in that: The bottom of the valve body (12) is provided with a base plate (13), and multiple mounting screws (14) are provided through the edge of the base plate (13), and the base plate (13) is fixed to the valve body (12) by the mounting screws (14).

5. The isolation-type corrosion-resistant solenoid valve according to claim 1, characterized in that: The valve body (12) has a first valve port and a second valve port on its two sides respectively. The first valve port communicates with the interior of the valve body (12). The bottom end of the second valve port has an L-shaped channel that communicates with the interior of the valve body (12). The valve port seal (4) is located at the top of the L-shaped channel.

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