Spherical electromagnetic type gas emergency cut-off valve

Abstract

The utility model discloses a spherical electromagnetic type gas emergency cut-off valve which comprises a valve body, a movable iron core, a valve plug assembly, a spring, a leather film, a coil assembly and a pull rod assembly. The valve body is provided with an inlet, an outlet and a valve body small nozzle communicated with the inlet and the outlet, and the lower end of the coil assembly is detachably connected with the valve body; the lower end of the movable iron core is a spheroid, the spheroid is arranged in the valve plug assembly in a matched mode, and the upper end of the movable iron core is installed in the coil assembly, connected with the lower end of the pull rod assembly and capable of moving downwards under the action of the coil assembly to drive the valve plug assembly to block the small valve body nozzle. Or under the action of the pull rod assembly, the valve plug assembly is driven to be separated from the valve body small nozzle; according to the ball valve, the lower end of the movable iron core is arranged to be the spherical body, the spherical body is matched with the ball of the valve plug assembly, accessories are reduced, the structure is simplified, automatic guiding can be achieved through ball matching, and the stability and durability of the ball valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas emergency cut-off valves, and particularly relates to a spherical electromagnetic gas emergency cut-off valve. Background Art

[0002] The electromagnetic gas emergency cut-off valve is a gas pipeline safety device. In the normal state of the pipeline, it is open to allow gas to flow through the pipeline. When an external signal drives the electromagnetic coil, the cut-off valve quickly shuts off to prevent the flow of gas. The gas emergency cut-off valve mainly drives the valve plug to open or block the sealing port of the valve body by the up and down movement of the moving iron core. The existing cut-off valve has many accessories and a too complex structural composition, with multiple limits, resulting in the misalignment of the valve plug and the sealing port of the valve body, leading to leakage. Content of the Utility Model

[0003] Aiming at the defects in the prior art, the purpose of the utility model is to provide a spherical electromagnetic gas emergency cut-off valve that is not prone to leakage.

[0004] The technical solution adopted by the utility model is as follows:

[0005] The spherical electromagnetic gas emergency cut-off valve includes a valve body, a moving iron core, a valve plug assembly, a spring, a diaphragm, a coil assembly, and a pull rod assembly; an inlet, an outlet, and a small valve opening of the valve body communicating the inlet and the outlet are provided on the valve body. The lower end of the coil assembly is detachably connected to the valve body. The diaphragm is installed between the coil assembly and the valve body. The spring is sleeved on the valve plug assembly, and its two ends respectively abut against the valve plug assembly and the diaphragm. The lower end of the moving iron core is a spherical body, which passes through the diaphragm, and the sphere is fitted inside the valve plug assembly. The upper end of the moving iron core is inserted into the coil assembly and connected to the lower end of the pull rod assembly, and can move downward under the action of the coil assembly to drive the valve plug assembly to block the small valve opening of the valve body, or move upward under the action of the pull rod assembly to drive the valve plug assembly to separate from the small valve opening of the valve body.

[0006] Further, the moving iron core is an integrally formed structure.

[0007] Further, the valve plug assembly includes a valve plug seat and a valve plug seal. The valve plug seat is arranged inside the diaphragm. The spring is sleeved on the valve plug seat, and its two ends respectively abut against the diaphragm and the valve plug seat. The valve plug seal is sleeved on the lower end of the valve plug seat. The lower end of the moving iron core is in spherical fit with the valve plug seat.

[0008] Further, the coil assembly is connected to the valve body by screws.

[0009] Further, a spherical groove is provided at the upper end of the valve plug seat, and notches are provided on both sides of the spherical groove. The spherical body at the lower end of the moving iron core is pressed into the spherical groove.

[0010] Further, a strong magnet is installed in the coil assembly.

[0011] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0013] Figure 1 is a schematic structural diagram of the spherical electromagnetic gas emergency cut-off valve provided by the embodiment of the present application;

[0014] Figure 2 is a schematic structural diagram of the valve plug seat provided by the embodiment of the present application.

[0015] Among them, the pull rod assembly 1, the coil assembly 2, the moving iron core 3, the spherical body 31, the diaphragm 4, the valve body 5, the small nozzle 51 of the valve body, the spring 6, the valve plug seat 7, the spherical groove 71, the notch 72, the valve plug seal 8. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Here, it should be noted that the functions, methods, etc. involved in the present utility model are merely conventional adaptive applications of the prior art. Therefore, the improvement of the present utility model over the prior art lies essentially in the connection relationship between the hardware, rather than the functions and methods themselves. That is, although the present utility model involves certain functions and methods, it does not include improvements to the functions and methods themselves. The description of the functions and methods in the present utility model is for better explaining the present utility model, so as to better understand the present utility model.

[0017] The following will describe in detail the embodiments of the technical solutions of the present utility model with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and thus are only examples and cannot be used to limit the protection scope of the present utility model.

[0018] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the present application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0019] See Figures 1 to 2, a spherical electromagnetic gas emergency cut-off valve of the present application includes a valve body 5, a moving iron core 3, a spring 6, a diaphragm 4, a coil assembly 2 and a pull rod assembly 1; the valve body 5 is provided with an inlet, an outlet and a small valve opening 51 of the valve body connecting the inlet and the outlet. The lower end of the coil assembly 2 is detachably connected to the valve body 5. The diaphragm 4 is installed between the coil assembly 2 and the valve body 5. The spring 6 is sleeved on the valve plug assembly, and its two ends are respectively abutted against the valve plug assembly and the diaphragm 4; the lower end of the moving iron core 3 is a spherical body 31, and this spherical body 31 passes through the diaphragm 4 and the sphere is fitted in the valve plug assembly. The upper end of the moving iron core 3 is installed in the coil assembly 2 and is connected to the lower end of the pull rod assembly 1, and can move downward under the action of the coil assembly 2 to drive the valve plug assembly to block the small valve opening 51 of the valve body, or move upward under the action of the pull rod assembly 1 to drive the valve plug assembly to separate from the small valve opening 51 of the valve body.

[0020] In the present application, by setting the lower end of the moving iron core 3 as the spherical body 31, this spherical body 31 is in spherical fit with the valve plug assembly, reducing the parts and simplifying the structure. The spherical fit can automatically align, improving the stability and durability of the ball valve and reducing the occurrence of leakage.

[0021] One end of the valve body 5 is provided with an inlet, the other end is provided with an outlet, and the small valve opening 51 of the valve body is arranged between the inlet and the outlet, and its upper end is open to connect the inlet and the outlet.

[0022] After winding the coil, it is injection-molded into the coil assembly 2, and a strong magnet is installed in the coil assembly 2; the coil assembly 2 is connected to the valve body 5 by screws.

[0023] The valve plug assembly includes a valve plug seal 8 and a valve plug seat 7. The lower end of the diaphragm 4 is installed between the valve body 5 and the coil assembly 2, and its upper end abuts against the coil assembly 2; the valve plug seat 7 is arranged in the diaphragm 4, the spring 6 is sleeved on the valve plug seat 7, and its upper end abuts against the top of the diaphragm 4 and its lower end abuts against the valve plug seat 7; the valve plug seal 8 is sleeved on the lower end of the valve plug seat 7, and the lower end of the moving iron core 3 passes through the diaphragm 4 and is in spherical fit with the valve plug seat 7.

[0024] Specifically, the moving iron core 3 is an integrally formed structure; a spherical groove 71 is provided at the upper end of the valve plug seat 7, and notches 72 are provided on both sides of this spherical groove 71, and the spherical body 31 at the lower end of the moving iron core 3 is pressed into the spherical groove 71.

[0025] The lower end of the pull rod assembly 1 passes through the coil assembly 2 and is screwed into the upper end of the moving iron core 3 to be connected to the moving iron core 3, and the upper end of the pull rod assembly 1 is screwed into the protective sleeve.

[0026] With the above structure, when the coil is de-energized, the pull rod assembly 1 is pulled up, the moving iron core 3 is attracted to the coil assembly 2, the valve plug seal 8 is separated from the small nozzle 51 of the valve body, the inlet and outlet of the valve body 5 are communicated through the small nozzle, the solenoid valve is in the normally open state, and at the same time the spring 6 is compressed; when a magnetic force is generated in the coil passage, the magnetic pole direction of the moving iron core 3 is opposite to the direction of the strong magnetic poles installed in the coil assembly 2, and with the restoring force of the spring 6 acting, the moving iron core 3 moves rapidly downward, driving the valve plug seat 7 to move downward, and the valve plug seal 8 on the valve plug seat 7 fits tightly with the small nozzle 51 of the valve body, disconnecting the passage between the inlet and outlet of the valve body 5, and the solenoid valve is in the instantaneously closed state.

[0027] In this application, the moving iron core 3 is of an integrally formed structure. One-time clamping and processing improves the machining accuracy of the moving iron core 3 and increases its service life. Compared with the two-piece moving iron core 3 structure screwed together through a threaded structure, the manufacturing cost is reduced; a spherical body 31 is provided at the lower end of the moving iron core 3, and a spherical groove 71 is provided at the upper end of the valve plug seat 7. The moving iron core 3 and the valve plug seat 7 are connected by a spherical mating method. When the moving iron core 3 and the valve plug seat 7 are mated, they can automatically adjust the direction and can perform sealing more effectively.

[0028] In this application, unless otherwise clearly defined and limited, terms such as "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] In the description of the specification of this utility model, a large number of specific details are illustrated. However, it can be understood that the embodiments of this utility model can be practiced without these specific details. In some instances, well-known methods, systems and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, systems, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. Spherical electromagnetic gas emergency shut-off valve, characterized in that: It includes a valve body, a moving iron core, a valve plug assembly, a spring, a diaphragm, a coil assembly and a pull rod assembly; the valve body is provided with an inlet, an outlet and a valve body small mouth connecting the inlet and the outlet, the lower end of the coil assembly is detachably connected to the valve body, the diaphragm is installed between the coil assembly and the valve body, the spring is sleeved on the valve plug assembly, and its two ends are respectively abutted against the valve plug assembly and the diaphragm; the lower end of the moving iron core is a spherical body, the spherical body passes through the diaphragm, and the spherical body fits in the valve plug assembly, the upper end of the moving iron core is installed in the coil assembly, and is connected to the lower end of the pull rod assembly, and can move downward under the action of the coil assembly to drive the valve plug assembly to seal on the valve body small mouth, or move upward under the action of the pull rod assembly to drive the valve plug assembly to separate from the valve body small mouth.

2. The spherical electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The moving iron core is an integrally formed structure.

3. The spherical electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The valve plug assembly includes a valve plug seat and a valve plug seal. The valve plug seat is arranged in the diaphragm. The spring is sleeved on the valve plug seat, and its two ends are respectively abutted against the diaphragm and the valve plug seat. The valve plug seal is sleeved on the lower end of the valve plug seat, and the lower end of the moving iron core cooperates with the valve plug seat ball.

4. The spherical electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The coil assembly is connected to the valve body via screws.

5. The spherical electromagnetic gas emergency shut-off valve according to claim 3, characterized in that: A spherical groove is arranged at the upper end of the valve plug seat, notches are arranged on both sides of the spherical groove, and the spherical body at the lower end of the moving iron core is pressed into the spherical groove.

6. The spherical electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The coil assembly is equipped with a strong magnet.

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