A dual-spring stable structure electromagnetic gas emergency shut-off valve

Abstract

The present invention discloses an electromagnetic gas emergency shut-off valve with a double-spring stable structure. In view of the problems of poor holding force stability of traditional electromagnetic gas emergency shut-off valves and the difficulty in maintenance due to the lack of a quick-disassembly actuator, the present invention removes the double permanent magnets and magnetic conductive sheets in the actuator, and replaces the fixed iron core with a single circular NdFeB permanent magnet. The circular NdFeB permanent magnet cooperates with the magnetic conductive frame to form a magnetic field closed loop, adsorb and lock the moving iron core, thereby simplifying the actuator and improving the magnetic field stability. A support spring (spring one) is arranged between the actuator and the upper valve cover to maintain the vertical stability of the actuator. A rotating snap-on locking structure is arranged between the actuator housing and the upper valve cover to ensure connection and quick disassembly.

Description

Technical Field

[0001] The invention relates to the technical field of gas valves, and in particular to an electromagnetic gas emergency shut-off valve with a double-spring stable structure. Background Art

[0002] In the prior art, electromagnetic gas emergency shut-off valves mainly use a spring in the valve body to work with an external electromagnetic actuator to achieve emergency shut-off of the gas pipeline. Due to cost issues, the permanent magnets used in the actuators of small-diameter products (DN50 and below) are all a ferrite plus a neodymium iron boron model. However, the ferrite material itself has a large magnetic attenuation in a high temperature environment, resulting in insufficient holding force when the shut-off valve is open, which is prone to accidental closure.

[0003] On the other hand, small-diameter products are mostly installed indoors in users' homes. In a high-temperature and high-smoke working environment, the maintenance and repair of traditional solenoid cut-off valves, which lack a quick-disassembly design for the actuator, can only be replaced as a whole in most cases. Without professional personnel to operate, it is very easy to cause gas leakage, which poses a huge safety hazard. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide an electromagnetic gas emergency shut-off valve with a double-spring stable structure that overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of the present invention, there is provided an electromagnetic gas emergency shut-off valve with a double spring stable structure, comprising:

[0006] Valve closing mechanism, valve body closing mechanism and actuator; among which,

[0007] The flat diaphragm 10 is connected to the valve disc 9 and connected to the moving iron core 13 through the core shaft connector 17; the spring 2 16 is vertically installed between the valve disc 9 and the upper valve cover 7; the O-ring 1 5 and the O-ring 2 6 are installed in the slot of the moving iron core 13 to form a valve closing and sealing mechanism;

[0008] The upper valve cover 7 is fixedly connected to the valve body 18; the O-ring 3 8 is installed in the groove of the valve body 18 to form a valve body sealing mechanism;

[0009] The magnetic frame 11 is arranged perpendicular to the moving iron core 13, and the permanent magnet 2 is parallel to the moving iron core 13 and is adsorbed and installed on the inner side of the magnetic frame 11; the wound coil 3 wraps around the wire slot of the frame 12, and its inner ring remains perpendicular to the permanent magnet 2 and the moving iron core 13 to form an actuator.

[0010] The housing 1 is connected to the upper valve cover 7 by a rotating buckle.

[0011] Spring 15 is vertically installed between the upper valve cover 7 and the magnetic conductive plate 14.

[0012] The external cable 4 is connected to the winding coil 3 .

[0013] The upper valve cover 7 and the valve body 18 are fixedly connected by four M4 nuts.

[0014] The top of the frame 12 wraps around the permanent magnet 2 and is vertically mounted on the inner side of the magnetic conductive frame 11 .

[0015] The valve opening operation principle includes:

[0016] The actuator moves downward and compresses spring 15; the permanent magnet 2 contacts and adsorbs the top of the moving iron core 13; the spring 2 16 in the valve body begins to compress in height under the tension of the spring 15, and the tension of the spring 15 pushes the actuator upward and drives the moving iron core 13 adsorbed by the permanent magnet 2 to move upward; when the moving iron core 13 drives the valve disc 9 to move up to the valve opening height, the internal spring force and the magnetic adsorption force reach a balance, thereby stabilizing and maintaining the opening state and height of the valve disc 9.

[0017] The valve closing operation principle includes:

[0018] When the winding coil 3 is energized, the magnetic field of the permanent magnet 2 is broken, and the moving iron core 13 moves downward under the tension of the spring 16 to close the valve; the actuator moves upward under the tension of the spring 15, and continues to maintain vertical stability under the combined action of the tension of the spring 16 and the rotating buckle between the actuator, the housing 1 and the upper valve cover 7.

[0019] The valve closing operation principle also includes:

[0020] In the valve open state, the actuator is manually lifted upwards. When the lifting force manually applied to the actuator is greater than the magnetic attraction force of the permanent magnet 2 on the moving iron core 13, the moving iron core 13 and the permanent magnet 2 are unlocked, and under the tension of the spring 16, the moving iron core 13 moves downwards and maintains the valve closed state.

[0021] The relationship between the internal forces when the valve is open includes:

[0022] The magnetic attraction force of the permanent magnet 2 on the moving iron core 3 + the compression force of the spring 16 + the self-weight of the parts of the actuator that produce displacement = the relaxation force of the spring 15.

[0023] According to one or more of the above technical solutions of the present invention, a dual-spring stable structure electromagnetic gas emergency shut-off valve is provided. In view of the poor stability of the holding force of the traditional electromagnetic gas emergency shut-off valve and the difficulty in maintenance due to the lack of a quick-release actuator, the present invention removes the dual permanent magnets and magnetic conductive sheets in the actuator, and replaces the fixed iron core with a single circular NdFeB permanent magnet. The circular NdFeB permanent magnet cooperates with the magnetic conductive frame to form a magnetic field closed loop, adsorb and lock the moving iron core, thereby simplifying the actuator and improving the magnetic field stability. A support spring (spring one) is provided between the actuator and the upper valve cover to maintain the vertical stability of the actuator. A rotating snap-on locking structure is provided between the actuator housing and the upper valve cover to ensure connection and quick disassembly.

[0024] The solution of the embodiment of the present invention reduces the internal parts of the actuator, thereby simplifying the production steps; the new permanent magnet layout avoids false closures triggered by magnetic attenuation caused by harsh working environments such as high temperature and high oil smoke; the double-spring stable structure cooperates with the quick-disassembly design of the actuator to reduce the difficulty of product maintenance and repair, and reduce the safety hazards caused by gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0026] Figure 1 A schematic diagram of the structure of an electromagnetic gas emergency shut-off valve with a double-spring stable structure according to an embodiment of the present invention is shown;

[0027] Figure 2 Six views of an electromagnetic gas emergency shut-off valve with a double-spring stable structure according to an embodiment of the present invention are shown.

[0028] Figure numerals: 1-housing, 2-permanent magnet, 3-winding coil, 4-external cable, 5-O-ring one, 6-O-ring two, 7-upper valve cover, 8-O-ring three, 9-valve disc, 10-flat membrane, 11-magnetic frame, 12-skeleton, 13-moving iron core, 14-magnetic plate, 15-spring one, 16-spring two, 17-core shaft connector, 18-valve body. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] Embodiment 1

[0031] Figure 1 The schematic diagram of the structure of the electromagnetic gas emergency shut-off valve with double spring stabilization structure of this embodiment is shown. Figure 1 The dual-spring stable structure electromagnetic gas emergency shut-off valve may include:

[0032] Valve closing mechanism, valve body closing mechanism, actuator and upper stabilizing mechanism, among which:

[0033] The flat diaphragm 10 is connected to the valve disc 9 and is connected to the moving iron core 13 through the core shaft connector 17. The spring 2 16 is vertically installed between the valve disc 9 and the upper valve cover 7; the O-ring 1 5 and the O-ring 2 6 are installed in the slot of the moving iron core 13 to form a valve closing and sealing mechanism.

[0034] The upper valve cover 7 is fixedly connected to the valve body 18 by four M4 nuts; the O-ring 3 8 is installed in the groove of the valve body 18 to form a valve body sealing mechanism.

[0035] The magnetic frame 11 is arranged perpendicular to the moving iron core 13, the permanent magnet 2 is parallel to the moving iron core 13 and is adsorbed and installed on the inner side of the magnetic frame 11, the top of the skeleton 12 wraps the permanent magnet 2 and is vertically installed on the inner side of the magnetic frame 11, the wound coil 3 wraps the wire slot of the skeleton 12, and its inner ring remains perpendicular to the permanent magnet 2 and the moving iron core 13, forming an actuator.

[0036] The housing 1 is connected to the upper valve cover 7 by a rotating buckle, and a spring 15 is vertically installed between the upper valve cover 7 and the magnetic conductive plate 14 to form an upper stabilizing mechanism.

[0037] The external cable 4 is connected to the winding coil 3 inside the housing 1 .

[0038] like Figure 2 1 and 2, which are six-sided views of a double-spring stable structure electromagnetic gas emergency shut-off valve according to an embodiment of the present invention.

[0039] The working principle of the embodiment of the present invention is:

[0040] The actuator moves downward and compresses spring 15;

[0041] The permanent magnet 2 contacts and adsorbs the top of the moving iron core 13;

[0042] The spring 2 16 in the valve body begins to compress in height under the tension of the spring 15. The tension of the spring 15 pushes the actuator upward and drives the moving iron core 13 attracted by the permanent magnet 2 to move upward.

[0043] When the moving iron core 13 drives the valve disc 9 to move up to the valve opening height, the internal spring force and the magnetic adsorption force reach a balance, thereby stabilizing and maintaining the opening state and height of the valve disc 9;

[0044] When the winding coil 3 is energized, the magnetic field of the permanent magnet 2 is broken, and the moving iron core 13 moves downward under the tension of the spring 16 to close the valve. The actuator moves upward under the tension of the spring 15, and continues to maintain vertical stability under the combined action of the tension of the spring 16 and the rotating buckle between the actuator, the housing 1 and the upper valve cover 7;

[0045] In the valve open state, the actuator is manually lifted upwards. When the lifting force manually applied to the actuator is greater than the magnetic attraction force of the permanent magnet 2 on the moving iron core 13, the moving iron core 13 and the permanent magnet 2 are unlocked, and under the tension of the spring 16, the moving iron core 13 moves downwards and maintains the valve closed state.

[0046] In the embodiment of the present invention, the relationship between the internal forces in the valve open state is:

[0047] The magnetic attraction force of the permanent magnet 2 on the moving iron core 3 + the compression force of the spring 16 + the self-weight of the components that produce displacement such as the actuator = the relaxation force of the spring 15.

[0048] In various embodiments of the present invention, a dual-spring stable structure electromagnetic gas emergency shut-off valve is provided. In view of the problems of poor holding force stability of traditional electromagnetic gas emergency shut-off valves and the lack of quick-release actuators and difficult maintenance, the present invention removes the dual permanent magnets and magnetic conductive sheets in the actuator, and replaces the fixed iron core with a single circular NdFeB permanent magnet. The circular NdFeB permanent magnet cooperates with the magnetic conductive frame to form a magnetic field closed loop, adsorb and lock the moving iron core, thereby simplifying the actuator and improving the magnetic field stability. A support spring (spring one) is provided between the actuator and the upper valve cover to maintain the vertical stability of the actuator. A rotating snap-on locking structure is provided between the actuator housing and the upper valve cover to ensure connection and quick disassembly.

[0049] The solution of the embodiment of the present invention reduces the internal parts of the actuator, thereby simplifying the production steps; the new permanent magnet layout avoids false closures triggered by magnetic attenuation caused by harsh working environments such as high temperature and high oil smoke; the double-spring stable structure cooperates with the quick-disassembly design of the actuator to reduce the difficulty of product maintenance and repair, and reduce the safety hazards caused by gas leakage.

[0050] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0051] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those explicitly recited in each claim. More specifically, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present invention.

[0052] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0053] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, any one of the embodiments claimed in the claims can be used in any combination.

[0054] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0055] It should be noted that the above embodiments illustrate rather than limit the invention, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware.

[0056] The above description is only a specific implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, several improvements, modifications, and variations can be made without departing from the spirit of the present invention. These improvements, modifications, and variations should be deemed to fall within the scope of protection of this application.

Claims

1. A double spring stable structure electromagnetic gas emergency shut-off valve, It is characterized in that include: Valve closing mechanism, valve body closing mechanism and actuator; among which, The flat diaphragm (10) is connected to the valve disc (9) and is connected to the moving iron core (13) through a core shaft connector (17); the second spring (16) is vertically installed between the valve disc (9) and the upper valve cover (7); the first O-ring (5) and the second O-ring (6) are installed in the slot of the moving iron core (13) to form a valve closing and sealing mechanism; The upper valve cover (7) is fixedly connected to the valve body (18); the O-ring 3 (8) is installed in the groove of the valve body (18) to form a valve body sealing mechanism; The magnetic frame (11) is arranged perpendicular to the moving iron core (13), and the permanent magnet (2) is parallel to the moving iron core (13) and is adsorbed and installed on the inner side of the magnetic frame (11); the winding coil (3) wraps around the wire slot of the frame (12), and its inner ring is kept perpendicular to the permanent magnet (2) and the moving iron core (13), so as to form an actuator; Spring 1 (15) is vertically installed between the upper valve cover (7) and the magnetic conductive plate (14); The relationship between the internal forces when the valve is open includes: The magnetic attraction force of the permanent magnet (2) on the moving iron core (13) + the compression force of the spring 2 (16) + the self-weight of the component of the actuator that generates displacement = the relaxation force of the spring 1 (15).

2. According to claim 1, the electromagnetic gas emergency shut-off valve with double spring stable structure, It is characterized in that Also includes: The housing (1) is connected to the upper valve cover (7) via a rotating buckle.

3. The electromagnetic gas emergency shut-off valve with double spring stable structure according to claim 1, It is characterized in that Also includes: The external cable (4) is connected to the winding coil (3).

4. The electromagnetic gas emergency shut-off valve with double spring stable structure according to claim 1, It is characterized in that The upper valve cover (7) and the valve body (18) are fixedly connected via four M4 nuts.

5. The electromagnetic gas emergency shut-off valve with double spring stable structure according to claim 1, It is characterized in that Also includes: The top of the frame (12) wraps around the permanent magnet (2) and is vertically mounted on the inner side of the magnetic conductive frame (11).

6. The electromagnetic gas emergency shut-off valve with double spring stable structure according to any one of claims 1 to 5, It is characterized in that The valve opening operation principle includes: The actuator moves downward and compresses spring one (15); the permanent magnet (2) contacts and attracts the top of the moving iron core (13); spring two (16) in the valve body begins to compress in height under the action of the tension of spring one (15); the tension of spring one (15) pushes the actuator upward and drives the moving iron core (13) attracted by the permanent magnet (2) to move upward; when the moving iron core (13) drives the valve disc (9) to move upward to the valve opening height, the internal spring force and the magnetic attraction force reach a balance, thereby stabilizing and maintaining the opening state and height of the valve disc (9).

7. The electromagnetic gas emergency shut-off valve with double spring stable structure according to claim 5, It is characterized in that The valve closing operation principle includes: When the winding coil (3) is energized, the magnetic field of the permanent magnet (2) is broken, and the moving iron core (13) moves downward under the tension of the second spring (16) to close the valve; the actuator moves upward under the tension of the first spring (15), and continues to maintain vertical stability under the combined action of the tension of the second spring (16) and the rotating buckle between the actuator, the housing (1) and the upper valve cover (7).

8. The electromagnetic gas emergency shut-off valve with double spring stable structure according to claim 7, It is characterized in that The valve closing operation principle also includes: In the valve-open state, the actuator is manually lifted upwards slightly; when the lifting force manually applied to the actuator is greater than the magnetic attraction force of the permanent magnet (2) on the moving iron core (13), the moving iron core (13) and the permanent magnet (2) are unlocked, and under the action of the tension of the spring 2 (16), the moving iron core (13) moves downwards and maintains the valve-closed state.

Images