Small-drift-diameter normally-open electromagnetic valve

Abstract

The utility model discloses a small-drift-diameter normally-open electromagnetic valve which comprises a valve body, a coil is arranged on the top of the valve body, a valve element assembly is arranged in the valve body, a cap screwing device is arranged on the outer wall of the valve element assembly, and an ejector rod used for driving the valve element assembly to move is arranged at the top end of the valve element assembly. A reset spring used for pushing the valve element assembly is arranged on the outer wall of the valve element assembly, the valve element assembly comprises a small valve, and a valve pad used for auxiliary sealing is arranged in the small valve. By means of the design of the reset spring and the valve element assembly, when the coil is powered on and the driving ejector rod pushes the small valve to plug the circulation opening, the small valve can drive the valve pad to plug the circulation opening at the same time, under the pushing effect of the pushing spring, the valve pad can be tightly attached to the top end of the circulation opening, and therefore under the dual effects of the small valve and the valve pad, the circulation opening is sealed. When the normally-open electromagnetic valve is powered on, the sealing performance of the electromagnetic valve is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a normally open electromagnetic valve with a small diameter. Background Art

[0002] A small-diameter solenoid valve is a small valve specially used for small and micro flows. A small-diameter normally-open solenoid valve is a valve body that controls the valve to be open when no power is supplied through internal electronic components. After an electronic signal is applied, the valve is closed. For traditional normally-open solenoid valves, a valve is used to block the flow pipe opening when the valve is opened and closed. When the valve is partially damaged, the valve will not seal tightly and leak, requiring valve replacement. Utility Model Content

[0003] The purpose of the utility model is to provide a small-diameter normally open solenoid valve to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small-diameter normally open solenoid valve, comprising a valve body, a coil for generating electromagnetic is arranged on the top of the valve body, a valve core assembly for blocking the flow port is arranged inside the valve body, a screw cover device for installing the valve core assembly is arranged on the outer wall of the valve core assembly, a push rod for driving the valve core assembly to move is arranged on the top of the valve core assembly, a reset spring for pushing the valve core assembly is arranged on the outer wall of the valve core assembly, the valve core assembly comprises a small valve, and a valve gasket for auxiliary sealing is arranged inside the small valve.

[0005] Preferably, the screw capping device is arranged on the top of the valve body, and a sealing ring for sealing the connection between the valve body and the screw capping device is arranged at the end of the valve body opposite to the screw capping device, and a shell is sleeved on the outer wall of the top of the screw capping device.

[0006] Preferably, a movable cavity for installing a valve core assembly is provided at the bottom of the screw cap device, the small valve is slidably and interlacedly connected with the movable cavity, and the return spring is sleeved on the outer wall of the bottom of the small valve.

[0007] Preferably, a mounting cavity for mounting a valve pad is provided at the bottom of the small valve, the valve pad is slidably and interlacedly connected with the mounting cavity, and a pushing member for pushing the valve pad to move is provided at the top of the valve pad.

[0008] Preferably, the pushing member comprises a pushing spring, the top end of the pushing spring is fixedly connected to the top end of the inner wall of the mounting cavity, and the bottom end of the pushing spring is fixedly connected to the top end of the valve pad.

[0009] Preferably, a through slot for movement of a push rod is provided at the top of the screw cap device, the push rod is slidably and interlacedly connected with the through slot, and the bottom end of the push rod is fixedly connected with the top end of the small valve.

[0010] Preferably, the coil is arranged inside the shell, the top end of the shell is fixedly connected to a steel pipe, the top end of the steel pipe is fixedly connected to an end cover, and the top end of the shell is provided with a nameplate.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model utilizes the design of a reset spring and a valve core assembly. When the coil is energized and the push rod is driven to push the small valve to seal the flow port, the small valve will drive the valve pad to seal the flow port at the same time. Under the pushing action of the push spring, the valve pad will cling to the top of the flow port. Therefore, under the dual action of the small valve and the valve pad, the sealing performance of the normally open solenoid valve is further improved when the power is supplied to the normally open solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve core component of the utility model.

[0015] In the figure: 1. valve body; 2. return spring; 3. sealing ring; 4. valve core assembly; 41. small valve; 42. push spring; 43. valve pad; 5. screw cap device; 6. push rod; 7. coil; 8. nameplate; 9. steel pipe; 10. end cover; 11. shell. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model provides Figure 1-2 A small-diameter normally open solenoid valve shown in the figure includes a valve body 1, a coil 7 for generating electromagnetic is arranged on the top of the valve body 1, a valve core assembly 4 for blocking the flow port is arranged inside the valve body 1, a screw cover device 5 for installing the valve core assembly 4 is arranged on the outer wall of the valve core assembly 4, a push rod 6 for driving the valve core assembly 4 to move is arranged on the top of the valve core assembly 4, a return spring 2 for pushing the valve core assembly 4 is arranged on the outer wall of the valve core assembly 4, and the valve core assembly 4 includes a small valve 41, and a valve gasket 43 for auxiliary sealing is arranged inside the small valve 41.

[0018] Specifically, the screw-on cap device 5 is arranged at the top of the valve body 1, and a sealing ring 3 for sealing the connection between the valve body 1 and the screw-on cap device 5 is arranged at the end opposite to the valve body 1. The outer wall of the top of the screw-on cap device 5 is sleeved with a shell 11, and the coil 7 is arranged inside the shell 11. The top of the shell 11 is fixedly connected with a steel pipe 9, and the top of the steel pipe 9 is fixedly connected with an end cover 10. A nameplate 8 is arranged at the top of the shell 11. A through groove for moving the push rod 6 is opened at the top of the screw-on cap device 5, and the push rod 6 is slidably and interlacedly connected with the through groove, and the bottom end of the push rod 6 is fixedly connected to the top of the small valve 41.

[0019] Furthermore, the sealing ring 3 is an O-ring, which is a rubber ring and is arranged between the valve body 1 and the screw-on cover device 5. The sealing ring 3 is squeezed by the valve body 1 and the screw-on cover device 5, so that the sealing ring 3 fills the gap between the valve body 1 and the screw-on cover device 5 to achieve a sealing effect. At the same time, the sealing ring 3 is arranged in a sleeve manner, and can be replaced at any time after the sealing ring 3 ages and fails. The top end of the shell 11 is fixedly connected to the bottom end of the steel pipe 9 by welding, and the bottom end of the nameplate 8 is fixedly connected to the top end of the shell 11 by welding. The surface of the nameplate 8 is used to record detailed data of the solenoid valve. The coil 7 is a plastic-sealed coil. When the coil 7 is energized, the push rod 6 can be driven to move in a direction close to the reset spring 2, thereby driving the small valve 41 to seal the flow port inside the valve body 1. The diameter of the through groove corresponds to the diameter of the push rod 6, and the bottom end of the push rod 6 is fixedly connected to the top of the small valve 41 by welding.

[0020] Specifically, a movable cavity for installing the valve core assembly 4 is provided at the bottom of the rotary cover device 5, the small valve 41 is slidably and interlacedly connected to the movable cavity, the reset spring 2 is sleeved on the outer wall of the bottom of the small valve 41, and a mounting cavity for installing the valve pad 43 is provided at the bottom of the small valve 41, the valve pad 43 is slidably and interlacedly connected to the mounting cavity, and a pushing member for pushing the valve pad 43 to move is provided at the top of the valve pad 43, and the pushing member includes a pushing spring 42, the top of the pushing spring 42 is fixedly connected to the top of the inner wall of the mounting cavity, and the bottom end of the pushing spring 42 is fixedly connected to the top of the valve pad 43.

[0021] Furthermore, the vertical cross-section of the small valve 41 is T-shaped, and the vertical cross-sections of the installation cavity and the valve pad 43 are both T-shaped, so that the installation cavity can limit the movement range of the valve pad 43, and the push spring 42 is always in a compressed state in the installation cavity, pushing the valve pad 43 to move toward the flow port, so that the bottom end of the valve pad 43 is flush with the bottom end of the small valve 41. After the coil 7 is energized, the push rod 6 is driven to move toward the reset spring 2, and the push rod 6 drives the small valve 41 to move toward the flow port. The small valve 41 pushes the spring 42 drives the valve pad 43 to move synchronously. When the bottom end of the valve pad 43 first contacts the flow port, the flow port is blocked to achieve the first seal. At this time, the small valve 41 keeps the moving direction unchanged and continuously compresses the push spring 42 until the bottom end of the small valve 41 contacts the inner wall of the flow channel to stop the movement of the small valve 41, so that the small valve 41 achieves the second seal. Through double sealing, the sealing performance of the solenoid valve when it is closed is improved. At the same time, the push rod 6 is a direct-acting structure, which can ensure that the sealing closing action is more stable.

[0022] Finally, it should be noted that the above is only 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 can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A normally open solenoid valve with a small diameter, comprising a valve body (1), wherein a coil (7) for generating electromagnetic force is arranged on the top of the valve body (1), characterized in that: The valve body (1) is provided with a valve core assembly (4) for blocking the flow port inside, the outer wall of the valve core assembly (4) is provided with a screw cover device (5) for installing the valve core assembly (4), the top end of the valve core assembly (4) is provided with a push rod (6) for driving the valve core assembly (4) to move, the outer wall of the valve core assembly (4) is provided with a return spring (2) for pushing the valve core assembly (4), the valve core assembly (4) includes a small valve (41), and the interior of the small valve (41) is provided with a valve gasket (43) for auxiliary sealing.

2. A small-diameter normally open solenoid valve according to claim 1, characterized in that: The screw cap device (5) is arranged on the top of the valve body (1); a sealing ring (3) for sealing the connection between the valve body (1) and the screw cap device (5) is arranged at the end of the valve body (1) opposite to the screw cap device (5); and a shell (11) is sleeved on the outer wall of the top of the screw cap device (5).

3. A small-diameter normally open solenoid valve according to claim 1, characterized in that: The bottom of the screw cap device (5) is provided with a movable cavity for installing the valve core assembly (4), the small valve (41) is slidably connected with the movable cavity, and the return spring (2) is sleeved on the outer wall of the bottom of the small valve (41).

4. A small-diameter normally open solenoid valve according to claim 3, characterized in that: The bottom of the small valve (41) is provided with an installation cavity for installing a valve pad (43), the valve pad (43) is slidably connected with the installation cavity, and the top of the valve pad (43) is provided with a pushing member for pushing the valve pad (43) to move.

5. A small-diameter normally open solenoid valve according to claim 4, characterized in that: The pushing member comprises a pushing spring (42), the top end of the pushing spring (42) is fixedly connected to the top end of the inner wall of the installation cavity, and the bottom end of the pushing spring (42) is fixedly connected to the top end of the valve pad (43).

6. A small-diameter normally open solenoid valve according to claim 1, characterized in that: A through slot for movement of a push rod (6) is provided at the top end of the screw cap device (5), the push rod (6) is slidably connected to the through slot, and the bottom end of the push rod (6) is fixedly connected to the top end of the small valve (41).

7. A small-diameter normally open solenoid valve according to claim 2, characterized in that: The coil (7) is arranged inside the shell (11), the top end of the shell (11) is fixedly connected to a steel pipe (9), the top end of the steel pipe (9) is fixedly connected to an end cover (10), and the top end of the shell (11) is provided with a nameplate (8).

Images