Highly airtight two-position three-way solenoid valve

Abstract

The utility model discloses a two-position three-way solenoid valve with high air tightness, comprising an electromagnetic assembly and a valve body assembly; the electromagnetic assembly comprises a valve core component, and the valve core component comprises a static iron core, a moving iron core spring and a moving iron core; the valve body assembly comprises a valve body, a limiter and a valve plug component; the valve body is provided with an exhaust channel, an air outlet channel and an air inlet channel; the valve plug component comprises a valve plug rod, a valve plug head and a valve plug spring; an exhaust flow hole is provided on the side of the limiter; a connecting hole is provided on the limiter; inside the valve body, an A sealing groove is provided near the exhaust channel, and a B sealing groove is provided near the air outlet channel; an A sealing gasket is provided between the first step of the limiter and the A sealing groove; a B sealing gasket is provided between the second step of the limiter and the B sealing groove. The two-position three-way solenoid valve with high air tightness of the utility model has a specific structure, so that when the sealing gasket is deformed by being squeezed, it can fill the groove to ensure the sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve with high air tightness. Background Art

[0002] Solenoid valve is an industrial device controlled by electromagnetics. It is an automation basic component used to control fluids. It is a control component used to control actuators, not limited to hydraulic and pneumatic forms. It is used to adjust the direction, flow, speed and other parameters of the medium in industrial control systems. Its working principle is to control the mechanical movement of the valve core by controlling the current on and off of the electromagnet, thereby closing and starting different vents to achieve the purpose of controlling certain parameters of the fluid entering the mechanical element.

[0003] Common solenoid valves are generally composed of an electromagnetic component that controls the valve core and a valve body component with an air flow channel. A limiter is usually provided between the electromagnetic component and the valve body component to limit the valve core, and a sealing gasket is sleeved on the limiter to prevent air leakage. For example, the two-position three-way solenoid valve of Chinese patent CN217842784U mentions that an annular groove is provided on the limiter, and a sealing gasket is sleeved on the annular groove.

[0004] However, in the actual production process, due to a slight deviation in the concentricity of the annular groove and the sealing gasket, the annular groove cannot be fully filled when the sealing gasket is squeezed and deformed after installation, and a gap will remain in the annular groove, resulting in poor sealing effect and air leakage. In addition, in this structure in which the sealing gasket is sleeved in the annular groove, during the installation process, there is friction while the inner wall of the valve body squeezes the sealing gasket, which may cause the sealing gasket to fall off on one side or get stuck on one side, thereby causing sealing failure. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present application provides a two-position three-way solenoid valve with high air tightness. The two-position three-way solenoid valve with high air tightness of the present application has a specific structure, so that when the sealing gasket is deformed by being squeezed, it can fill the groove to ensure the sealing effect; in addition, during installation, there is no friction between the sealing gasket and the inner wall of the valve body, thereby avoiding the sealing gasket from falling off, and the installation is more labor-saving.

[0006] The technical solution of this application is:

[0007] A two-position three-way solenoid valve with high air tightness comprises a matching solenoid assembly and a valve body assembly; the solenoid assembly comprises a coil component, a coil plastic-coated shell arranged on the periphery of the coil component and a valve core component arranged inside the coil component, the coil component comprises a coil bracket and a coil; the valve core component comprises a static iron core, a moving iron core spring and a moving iron core arranged in sequence; a spring placement groove is provided on the side of the moving iron core close to the static iron core, one end of the moving iron core spring is located in the spring placement groove, and the other end abuts against the static iron core, and the end of the static iron core away from the moving iron core abuts against the coil bracket; the valve body assembly comprises a valve body and a limiter and a valve plug component arranged in sequence inside the valve body; an exhaust channel, an air outlet channel and an air inlet channel are arranged on the valve body in sequence, and the exhaust channel is located on the side close to the solenoid assembly; the valve plug component comprises a valve plug rod, a valve plug head and a valve plug spring arranged in sequence; one end of the valve plug rod passes through the limiter and contacts with the moving iron core; the An exhaust circulation hole is provided on the side of the limit member, and the exhaust circulation hole is connected with the exhaust channel; a connecting hole is provided on the limit member for connecting the outlet channel and the exhaust circulation hole; a sealing groove A is provided inside the valve body near the exhaust channel; a sealing groove B is provided inside the valve body near the outlet channel; the limit member is stepped as a whole; a sealing gasket A is provided between the first step of the limit member and the sealing groove A, for blocking the fluid in the exhaust channel from entering the electromagnetic component from the gap; a sealing gasket B is provided between the second step of the limit member and the sealing groove B, for blocking the fluid in the outlet channel from entering the exhaust channel from the gap; when the power is off, one end of the valve plug head abuts against the outlet of the inlet channel for closing the inlet channel, at which time the outlet channel and the exhaust channel are connected through the connecting hole; when the power is on, one end of the valve plug head abuts against the connecting hole for closing the connecting hole, at which time the inlet channel and the outlet channel are connected.

[0008] Compared with the prior art, the high-air-tightness two-position three-way solenoid valve of the present application is provided with an A sealing groove near the exhaust channel inside the valve body, and a B sealing groove near the air outlet channel, and cooperates with a stepped limiter. An A sealing gasket is provided between the first step of the limiter and the A sealing groove. During installation, the A sealing gasket is squeezed to deform the A sealing gasket to fill the A sealing groove to block the fluid in the exhaust channel from the gap into the electromagnetic component; a B sealing gasket is provided between the second step of the limiter and the B sealing groove. During installation, the B sealing gasket is squeezed to deform the B sealing gasket to fill the B sealing groove to block the fluid in the air outlet channel from the gap into the exhaust channel, thereby achieving a sealing effect; when installing, the A sealing gasket and the B sealing gasket can be directly placed in the A sealing groove and the B sealing groove, and the installation is relatively labor-saving; and this upper and lower plane extrusion method can avoid the situation where the sealing gasket runs off or is incompletely filled, thereby ensuring the reliability of the sealing effect.

[0009] As an optimization, in the aforementioned high-airtightness two-position three-way solenoid valve, a T-shaped blocking cylinder is sleeved between the moving iron core and the coil bracket; one end of the T-shaped blocking cylinder is located between the electromagnetic assembly and the valve body assembly, and the other end is against the static iron core. With this structure, a T-shaped blocking cylinder is arranged between the moving iron core and the coil bracket, which can prevent the fluid from entering the coil component and corroding the coil and the coil bracket. Furthermore, the T-shaped blocking cylinder is welded to the static iron core. With this structure, the T-shaped blocking cylinder and the static iron core are an integrated structure, which further prevents the fluid from entering the coil component from the gap at the contact point between the T-shaped blocking cylinder and the static iron core.

[0010] As an optimization, in the aforementioned high airtightness two-position three-way solenoid valve, the material of the static iron core and the moving iron core is a soft magnetic alloy. The use of this material makes the static iron core and the moving iron core have better corrosion resistance.

[0011] As an optimization, in the aforementioned high airtightness two-position three-way solenoid valve, the material of the moving iron core spring is stainless steel. The use of this material makes the moving iron core spring have better corrosion resistance.

[0012] As an optimization, in the aforementioned high airtightness two-position three-way solenoid valve, the matching part between the outlet of the air inlet channel and the valve plug head and the matching part between the connecting hole and the valve plug head are both conical. This structure uses a line contact method for sealing, which reduces the requirements for the machining accuracy of the valve plug head contact surface while ensuring the sealing performance.

[0013] As an optimization, in the aforementioned high airtightness two-position three-way solenoid valve, a replaceable seal is provided at the valve body air port. With this structure, a replaceable seal is provided at the air port, which can play a role in strengthening the connection sealing between the solenoid valve and other components.

[0014] As an optimization, in the aforementioned high airtightness two-position three-way solenoid valve, the solenoid assembly is connected to the valve body assembly by bolts. With this structure, the connection reliability of the solenoid assembly and the valve body assembly is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the two-position three-way solenoid valve with high air tightness in this application. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the structure of the two-position three-way solenoid valve with high air tightness in this application. Figure 2 .

[0017] Figure 3 It is a schematic cross-sectional view of a two-position three-way solenoid valve with high air tightness of the present application.

[0018] Figure 4 It is a structural schematic diagram of the T-type barrier cylinder of the present application.

[0019] Figure 5 It is a structural schematic diagram of the limiter of this application.

[0020] Figure 6 It is a structural schematic diagram of the valve plug stem and valve plug head of the present application.

[0021] The marks in the accompanying drawings are: 1-electromagnetic assembly, 11-coil component, 111-coil bracket, 112-coil, 12-coil plastic-coated shell, 13-valve core component, 131-static iron core, 132-moving iron core spring, 133-moving iron core; 2-valve body assembly, 21-valve body, 211-exhaust channel, 212-air outlet channel, 213-air inlet channel, 214-A sealing groove, 215-B sealing groove, 22-limiting member, 221-exhaust flow hole, 222-connecting hole, 223-first step, 224-second step, 23-valve plug component, 231-valve plug stem, 232-valve plug head, 233-valve plug spring; 3-A sealing gasket; 4-B sealing gasket; 5-T-type blocking cylinder; 6-sealing member. DETAILED DESCRIPTION

[0022] The present application is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present application.

[0023] Example (see Figure 1 to Figure 6 ):

[0024] A two-position three-way solenoid valve with high air tightness comprises a solenoid assembly 1 and a valve body assembly 2 which are arranged in a matching manner; the solenoid assembly 1 comprises a coil component 11, a coil plastic-coated shell 12 arranged on the periphery of the coil component 11, and a valve core component 13 arranged inside the coil component 11, the coil component 11 comprises a coil support 111 and a coil 112; the valve core component 13 comprises a static iron core 131, a moving iron core spring 132 and a moving iron core 133 which are arranged in sequence; a spring placement groove is provided on one side of the moving iron core 133 close to the static iron core 131, one end of the moving iron core spring 132 is located in the spring placement groove, and the other end is connected to the static iron core 131. The static iron core 131 is in contact with the moving iron core 131, and one end of the static iron core 131 away from the moving iron core 133 is in contact with the coil support 111; the valve body assembly 2 includes a valve body 21 and a limiter 22 and a valve plug component 23 which are sequentially arranged inside the valve body 21; the valve body 21 is sequentially provided with an exhaust channel 211, an exhaust channel 212 and an intake channel 213, and the exhaust channel 211 is located on a side close to the electromagnetic assembly 1; the valve plug component 23 includes a valve plug rod 231, a valve plug head 232 and a valve plug spring 233 which are sequentially arranged; one end of the valve plug rod 231 passes through the limiter 22 and contacts with the moving iron core 133; the limiter An exhaust flow hole 221 is provided on the side of the stopper 22, and the exhaust flow hole 221 is connected to the exhaust channel 211; a connecting hole 222 is provided on the stopper 22 for connecting the outlet channel 212 and the exhaust flow hole 221; an A sealing groove 214 is provided inside the valve body 21 near the exhaust channel 211; a B sealing groove 215 is provided inside the valve body 21 near the outlet channel 212; the stopper 22 is in a stepped shape as a whole; an A sealing gasket 3 is provided between the first step 223 of the stopper 22 and the A sealing groove 214, for blocking the fluid in the exhaust channel 211 from entering from the gap. into the electromagnetic assembly 1; a B sealing gasket 4 is provided between the second step 224 of the limit member 22 and the B sealing groove 215, for preventing the fluid in the outlet channel 212 from entering the exhaust channel 211 from the gap; when the power is off, one end of the valve plug head 232 abuts against the outlet of the inlet channel 213, for closing the inlet channel 213, at this time, the outlet channel 212 and the exhaust channel 211 are connected through the connecting hole 222; when the power is on, one end of the valve plug head 232 abuts against the connecting hole 222, for closing the connecting hole 222, at this time, the inlet channel 213 and the outlet channel 212 are connected.

[0025] In this embodiment, a T-shaped blocking cylinder 5 is sleeved between the moving iron core 133 and the coil support 111; one end of the T-shaped blocking cylinder 5 is located between the electromagnetic assembly 1 and the valve body assembly 2, and the other end is against the static iron core 131. The T-shaped blocking cylinder 5 is arranged between the moving iron core 133 and the coil support 111 to prevent the fluid from entering the coil component 11 and corroding the coil 112 and the coil support 111.

[0026] In this embodiment, the T-shaped blocking cylinder 5 is welded to the static iron core 131. The T-shaped blocking cylinder 5 and the static iron core 131 are an integrated structure, which further prevents the fluid from entering the coil component 11 through the gap at the contact point between the T-shaped blocking cylinder 5 and the static iron core 131.

[0027] In this embodiment, the material of the static iron core 131 and the moving iron core 133 is a soft magnetic alloy. The use of this material makes the static iron core 131 and the moving iron core 133 have better corrosion resistance.

[0028] In this embodiment, the material of the movable iron core spring 132 is stainless steel. The use of this material makes the movable iron core spring 132 have better corrosion resistance.

[0029] In this embodiment, the matching part between the outlet of the inlet channel 213 and the valve plug head 232 and the matching part between the connecting hole 222 and the valve plug head 232 are both conical. This structure uses a line contact method for sealing, which reduces the machining accuracy requirements of the contact surface of the valve plug head 232 while ensuring the sealing performance.

[0030] In this embodiment, a replaceable sealing member 6 is provided at the gas port of the valve body 21. With this structure, a replaceable sealing member 6 is provided at the gas port, which can enhance the sealing performance of the connection between the solenoid valve and other components.

[0031] In this embodiment, the electromagnetic assembly 1 is connected to the valve body assembly 2 by bolts. With this structure, the connection reliability between the electromagnetic assembly 1 and the valve body assembly 2 is better.

[0032] When the high-air-tightness two-position three-way solenoid valve of this embodiment is not energized, the moving iron core 133, under the action of the elastic force of the moving iron core spring 132, applies a thrust to the valve plug stem 231, so that the valve plug head 232 blocks the air inlet channel 213. At this time, the air outlet channel 212 and the exhaust channel 211 are connected through the connecting hole 222, and the gas in the pneumatic mechanical equipment passes through the air outlet channel 212 and then is discharged from the exhaust channel 211; when energized, the moving iron core 133 overcomes the spring force under the action of the electromagnetic force and moves toward the static iron core 131. Under the action of the elastic force of the valve plug spring 233, the valve plug head 232 is separated from the air inlet channel 213 and blocks the connecting hole 222 on the limit member 22. At this time, the air inlet channel 213 and the air outlet channel 212 are connected, and the gas enters the valve body 21 from the air inlet channel 213 and then flows into the mechanical equipment from the air outlet channel 212.

[0033] The above general description of the utility model involved in this application and the description of its specific implementation method should not be understood as limiting the technical solution of the utility model. Based on the disclosure of this application, those skilled in the art can add, reduce or combine the disclosed technical features in the above general description or / and the specific implementation method (including examples) without violating the constituent elements of the utility model involved, to form other technical solutions within the scope of protection of this application.

Claims

1. A two-position three-way solenoid valve with high air tightness, comprising an electromagnetic assembly (1) and a valve body assembly (2) arranged in a matching manner; the electromagnetic assembly (1) comprises a coil component (11), a coil plastic-coated shell (12) arranged on the periphery of the coil component (11), and a valve core component (13) arranged inside the coil component (11); the coil component (11) comprises a coil support (111) and a coil (112); the valve core component (13) comprises a static iron core (131), a moving iron core spring (132), and a moving iron core (133) arranged in sequence; a spring placement groove is provided on a side of the moving iron core (133) close to the static iron core (131); one end of the moving iron core spring (132) is located in the spring placement groove, and the other end is in contact with the static iron core (131); and one end of the static iron core (131) away from the moving iron core (133) is in contact with the coil support (111); The valve body assembly (2) comprises a valve body (21), a stopper (22) and a valve plug assembly (23) which are sequentially arranged inside the valve body (21); an exhaust channel (211), an outlet channel (212) and an inlet channel (213) are sequentially arranged on the valve body (21), and the exhaust channel (211) is located on a side close to the electromagnetic assembly (1); the valve plug assembly (23) comprises a valve plug rod (231), a valve plug head (232) and a valve plug spring (233) which are sequentially arranged; one end of the valve plug rod (231) passes through the stopper (22) and contacts the moving iron core (133); an exhaust flow hole (221) is arranged on a side of the stopper (22), and the exhaust flow hole (221) is connected to the exhaust channel (211); a connecting hole (222) is arranged on the stopper (22) for connecting the outlet channel (212) and the exhaust flow hole (221); Features: An A sealing groove (214) is provided inside the valve body (21) near the exhaust channel (211); a B sealing groove (215) is provided inside the valve body (21) near the outlet channel (212); the stopper (22) is in a stepped shape as a whole; an A sealing gasket (3) is provided between the first step (223) of the stopper (22) and the A sealing groove (214), for preventing the fluid in the exhaust channel (211) from entering the electromagnetic assembly (1) from the gap; a B sealing gasket (4) is provided between the second step (224) of the stopper (22) and the B sealing groove (215), for preventing the fluid in the outlet channel (212) from entering the exhaust channel (211) from the gap; When the power is turned off, one end of the valve plug head (232) abuts against the outlet of the air inlet channel (213) to close the air inlet channel (213). At this time, the air outlet channel (212) and the exhaust channel (211) are connected via the connecting hole (222); when the power is turned on, one end of the valve plug head (232) abuts against the connecting hole (222) to close the connecting hole (222). At this time, the air inlet channel (213) and the air outlet channel (212) are connected.

2. The two-position three-way solenoid valve with high air tightness according to claim 1 is characterized in that: A T-shaped blocking cylinder (5) is sleeved between the moving iron core (133) and the coil support (111); one end of the T-shaped blocking cylinder (5) is located between the electromagnetic assembly (1) and the valve body assembly (2), and the other end abuts against the stationary iron core (131).

3. The two-position three-way solenoid valve with high air tightness according to claim 2 is characterized in that: The material of the static iron core (131) and the moving iron core (133) is a soft magnetic alloy.

4. The two-position three-way solenoid valve with high air tightness according to claim 3 is characterized in that: The material of the moving iron core spring (132) is stainless steel.

5. The highly airtight two-position three-way solenoid valve according to any one of claims 1 to 4, characterized in that: The matching portion between the outlet of the air inlet channel (213) and the valve plug head (232) and the matching portion between the connecting hole (222) and the valve plug head (232) are both conical.

6. The two-position three-way solenoid valve with high air tightness according to claim 5 is characterized in that: A replaceable sealing member (6) is provided at the air port of the valve body (21).

7. The two-position three-way solenoid valve with high air tightness according to claim 6 is characterized in that: The electromagnetic assembly (1) and the valve body assembly (2) are connected via bolts.

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