Electromagnetic type gas emergency cut-off valve

Abstract

The utility model relates to the technical field of electromagnetic valves, and discloses an electromagnetic type gas emergency cut-off valve which comprises a valve body, a valve element assembly, an electromagnetic control assembly and a manual control rod, the valve body comprises a cavity and a partition body, the electromagnetic control assembly comprises an electromagnetic coil pipe and a magnet, the magnet slides in the electromagnetic coil pipe, and the manual control rod is arranged in the cavity. The magnet is fixed to the valve element assembly, the electromagnetic coil pipe is fixed to the interior of the shell, the shell is fixedly connected with the valve body, through the structural design of the manual control rod and the shell, the electromagnetic control assembly is prevented from being interfered by the manual control rod, and quick response of the electromagnetic control assembly can be guaranteed; when electric control is carried out through the electromagnetic control assembly, the manual control rod is completely in zero contact with the electromagnetic control assembly without interference, and the manual control rod can tightly press the valve element assembly through threaded connection between the manual control rod and the shell, so that a good sealing effect is achieved under manual control.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic valves, and in particular to an electromagnetic gas emergency shut-off valve. Background Technology

[0002] Natural gas, as a common energy source, is widely used in homes, businesses, and industries, bringing great convenience to people's lives. However, this convenience also brings dangers. Gas leaks occur frequently, posing a serious threat to people's lives and property. Emergency gas shut-off valves can quickly cut off the gas supply in the event of a gas accident, preventing larger incidents.

[0003] Gas emergency shut-off valves generally include both electric and manual modes. Electric control mode offers fast and sensitive response, enabling rapid shut-off. However, electric control is susceptible to failure due to various component issues, such as sensor malfunction or control board damage, which can cause the gas emergency shut-off valve to become unresponsive. Therefore, a manual control structure is needed to ensure the gas emergency shut-off valve completes the closing operation. However, existing manual and electric control structures in gas emergency shut-off valves exhibit some mutual interference; the manual mechanism can affect the response speed of the electric control structure. Summary of the Invention

[0004] The purpose of this utility model is to provide an electromagnetic gas emergency shut-off valve to solve the problem of mutual interference between the manual control mechanism and the electric control mechanism of existing gas emergency shut-off valves.

[0005] This utility model is achieved through the following technical solution:

[0006] An electromagnetic gas emergency shut-off valve includes a valve body, a valve core assembly, an electromagnetic control assembly, and a manual control lever. The valve body includes a cavity and a partition. The electromagnetic control assembly includes an electromagnetic coil tube and a magnet. The magnet slides within the electromagnetic coil tube and is fixed to the valve core assembly. The electromagnetic coil tube is fixed within a housing, which is fixedly connected to the valve body. A guide hole coaxially arranged with the magnet is provided on the housing. A first threaded hole and a second threaded hole are respectively provided at both ends of the guide hole. The manual control lever includes a double-ended screw shaft, which includes a first threaded portion, a smooth shaft portion, and a second threaded portion.

[0007] In one possible design, the manual control lever extends into the housing to the shortest length when the first threaded portion is threaded into the second threaded hole, and extends into the housing to the longest length when the second threaded portion is threaded into the first threaded hole.

[0008] In one possible design, the cavity is divided into a first air passage and a second air passage by the partition. The valve core assembly includes a disc-shaped valve core and a valve stem. The disc-shaped valve core is fixed to one end of the valve stem, and the other end of the valve stem is fixed to the magnet. The disc-shaped valve core slides in the first air passage. The partition has a through hole for connecting the first air passage and the second air passage. The valve core assembly controls the opening and closing of the through hole under the push of the magnet.

[0009] In one possible design, a second conical sealing ring is fixedly provided on the side of the through hole facing the disc-shaped valve core, and a second annular conical surface is provided on the disc-shaped valve core, the second annular conical surface being located on the side of the disc-shaped valve core near the second conical sealing ring.

[0010] In one possible design, a sealing disc is provided between the cavity and the housing, and a central hole is provided at the center of the sealing disc. The valve stem passes through the central hole and slides relative to the sealing disc. Several annular grooves are provided between the inner wall of the central hole and the valve stem, and a sealing ring is provided in each annular groove.

[0011] In one possible design, a spring is provided between the sealing disc and the magnet.

[0012] In one possible design, the disc-shaped valve core is further provided with a first annular conical surface, which is located on the side opposite to the second annular conical surface. A first conical sealing ring is fixedly provided above the first annular conical surface, and the first conical sealing ring is fixed on the cavity.

[0013] In one possible design, the manual control lever further includes a knob that is fixed to the second threaded portion.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0015] This invention avoids interference from the manual control lever by using a structural design that integrates the manual control lever and the housing. This ensures a rapid response from the electromagnetic control component. When the electromagnetic control component is used for electric control, the manual control lever has zero contact and no interference with it. Furthermore, the threaded connection between the manual control lever and the housing allows the manual control lever to press firmly against the valve core assembly, thus achieving a good sealing effect under manual control. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0017] Figure 1This is a schematic diagram of the structure of the present invention in its normally open state;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic diagram of the disc-shaped valve core in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the present invention in the electromagnetic control off state;

[0021] Figure 5 This is a schematic diagram of the structure of this utility model in the manually closed state.

[0022] The reference numerals in the attached figures represent: 1-valve body, 101-cavity, 102-partition, 103-first air passage, 104-second air passage, 2-disc valve core, 201-first annular conical surface, 202-second annular conical surface, 3-housing, 301-first threaded hole, 302-second threaded hole, 4-electromagnetic coil tube, 5-magnet, 6-double-ended screw shaft, 601-first threaded part, 602-optical shaft part, 603-second threaded part, 7-valve stem, 8-sealing disc, 9-spring, 10-knob, 11-first conical sealing ring, 12-second conical sealing ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0024] Examples, such as Figures 1 to 5 As shown, this embodiment includes a valve body 1, a valve core assembly, an electromagnetic control assembly, and a manual control lever. The valve body 1 includes a cavity 101 and a partition 102. The electromagnetic control assembly includes an electromagnetic coil tube 4 and a magnet 5. The magnet 5 slides within the electromagnetic coil tube 4 and is fixed to the valve core assembly. The electromagnetic coil tube 4 controls the sliding of the magnet 5, thereby controlling the valve core assembly to control the opening and closing of the entire emergency shut-off valve. The electromagnetic coil tube 4 is fixed within a housing 3. The housing 3 and... The valve body 1 is fixedly connected. The housing 3 has a guide hole coaxially arranged with the magnet 5. The two ends of the guide hole are respectively provided with a first threaded hole 301 and a second threaded hole 302. The manual control rod includes a double-ended screw shaft 6. The double-ended screw shaft 6 includes a first threaded part 601, a light axis part 602 and a second threaded part 603. The first threaded part 601 and the second threaded part 603 are located at both ends of the light axis part 602. The light axis part 602 is slidably engaged with the guide hole.

[0025] Simultaneously, the first threaded portion 601 can be threadedly connected to the second threaded hole 302, and the second threaded portion 603 can be threadedly connected to the first threaded hole 301. The connection states of the first threaded portion 601 threadedly connected to the second threaded hole 302 and the connection states of the second threaded portion 603 threadedly connected to the first threaded hole 301 cannot coexist. When the first threaded portion 601 is threadedly connected to the second threaded hole 302, the manual control lever is in the uppermost position, and the length of the manual control lever extending into the housing 3 is the shortest. The magnet 5 can slide freely within the electromagnetic coil tube 4 without being affected by the manual control lever. When the second threaded portion 603 is threadedly connected to the first threaded hole 301, the length of the manual control lever extending into the housing 3 is the longest. The double-ended screw shaft 6 pushes the valve core assembly to close the entire emergency shut-off valve.

[0026] Specifically, the cavity 101 is divided into a first air passage 103 and a second air passage 104 by the partition 102. The valve core assembly includes a disc valve core 2 and a valve stem 7. The disc valve core 2 is fixed to one end of the valve stem 7, and the other end of the valve stem 7 is fixed to the magnet 5. The disc valve core 2 slides in the first air passage 103. A through hole is provided on the partition 102 to connect the first air passage 103 and the second air passage 104. The valve core assembly completes the opening and closing control of the through hole under the push of the magnet 5. A second conical sealing ring 12 is fixed on the side of the through hole facing the disc valve core 2. The disc valve core 2 is provided with a second annular conical surface 202. Through the cooperation of the second annular conical surface 202 and the second conical sealing ring 12, the sealing effect of the disc valve core 2 at the through hole position is further enhanced.

[0027] In this embodiment, a sealing disc 8 is provided between the cavity 101 and the housing 3. The sealing disc 8 has a central hole at its center. The valve stem 7 passes through the central hole and slides relative to the sealing disc 8. Several annular grooves are provided between the inner wall of the central hole and the valve stem 7. A sealing ring is provided in each annular groove, thereby preventing the gas in the first gas passage 103 from leaking out between the sealing disc 8 and the valve stem 7 under the action of the sealing ring.

[0028] In this embodiment, a spring 9 is provided between the sealing disc 8 and the magnet 5. The spring 9 causes the magnet 5 to be in the uppermost position when there is no magnetic force, thereby making the disc valve core 2 in the normally open state.

[0029] In this embodiment, the disc valve core 2 is further provided with a first annular conical surface 201. The first annular conical surface 201 is located on the side opposite to the second annular conical surface 202. A first conical sealing ring 11 is fixedly provided above the first annular conical surface 201. The first conical sealing ring 11 is fixed on the cavity 101. In the normally open state, the cooperation between the first annular conical surface 201 and the first conical sealing ring 11, as well as the elastic force of the spring 9, makes the disc valve core 2 and the first conical sealing ring 11 form a one-way sealing structure. Thus, the cooperation between the disc valve core 2 and the first conical sealing ring 11 can complete the anti-leakage of gas in the first gas passage 103. In addition, the sealing ring on the sealing disc 8 can further play a double anti-leakage protection effect.

[0030] It should be noted that the first gas passage 103 is generally the gas inlet end, and the second gas passage 104 is generally the gas outlet end. The gas pressure at the first gas passage 103 is greater than the gas pressure at the second gas passage 104. When closed, under the cooperation of the disc valve core 2 and the second conical sealing ring 12 and the magnetic force acting on the magnet 5, the disc valve core 2 and the second conical sealing ring 12 automatically form a one-way valve structure, which can effectively ensure the sealing effect between the disc valve core 2 and the separator 102.

[0031] In this embodiment, the manual control lever also includes a knob 10, which is fixed to the second threaded portion 603. Rotating the entire manual control lever by the knob 10 makes it easier to grip and requires less effort.

[0032] Working principle;

[0033] Under normal gas supply conditions, the entire emergency shut-off valve is in the normally open state. The electromagnetic coil tube 4 has no magnetic force on the magnet 5. The magnet 5 is in the highest position under the elastic force of the spring 9. The disc valve core 2 is in contact with the first conical sealing ring 11. At the same time, the first threaded part 601 on the double-ended screw shaft 6 is threadedly connected to the second threaded hole 302. The double-ended screw shaft 6 will not have any contact with the entire valve core assembly, ensuring that the valve core assembly can quickly respond and complete the opening and closing control under the control of the electromagnetic control component.

[0034] When manual closure is required, manually rotate the manual control lever to first disengage the first threaded portion 601 from the threaded connection with the second threaded hole 302. Then, press the manual control lever. Pressing the lever quickly pushes down the valve stem 7, ensuring a short and rapid manual valve closure process. The manual control lever pushes the valve stem 7 and the disc valve core 2 downwards. Just before the disc valve core 2 contacts the second conical sealing ring 12, the second threaded portion 603 reaches the optical axis portion 602. Then, rotate the entire manual control lever... The control rod causes the second threaded portion 603 to be screwed into the first threaded hole 301. As the second threaded portion 603 is continuously screwed into the first threaded hole 301, the disc valve core 2 gradually moves to a state of contact with the second conical sealing ring 12. During the process of the second threaded portion 603 being screwed into the second threaded hole 302, the thrust of the first threaded portion 601 on the valve stem 7 increases significantly, thereby enabling the disc valve core 2 and the second conical sealing ring 12 to achieve a good sealing effect, ensuring that the valve can be tightly closed when manually closed.

[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An electromagnetic gas emergency shut-off valve, comprising a valve body (1), a valve core assembly, an electromagnetic control assembly, and a manual control lever, characterized in that, The valve body (1) includes a cavity (101) and a partition (102). The electromagnetic control assembly includes an electromagnetic coil tube (4) and a magnet (5). The magnet (5) slides inside the electromagnetic coil tube (4) and is fixed to the valve core assembly. The electromagnetic coil tube (4) is fixed inside the housing (3). The housing (3) is fixedly connected to the valve body (1). The housing (3) has a guide hole coaxially arranged with the magnet (5). The two ends of the guide hole are respectively provided with a first threaded hole (301) and a second threaded hole (302). The manual control rod includes a double-ended screw shaft (6). The double-ended screw shaft (6) includes a first threaded part (601), an optical shaft part (602), and a second threaded part (603).

2. An electromagnetic gas emergency shut-off valve according to claim 1, characterized in that When the first threaded portion (601) is threadedly connected to the second threaded hole (302), the length of the manual control rod extending into the housing (3) is the shortest. When the second threaded portion (603) is threadedly connected to the first threaded hole (301), the length of the manual control rod extending into the housing (3) is the longest.

3. An electromagnetic gas emergency shut-off valve according to claim 2, characterised in that The cavity (101) is divided into a first air passage (103) and a second air passage (104) by the partition (102). The valve core assembly includes a disc valve core (2) and a valve stem (7). The disc valve core (2) is fixed to one end of the valve stem (7), and the other end of the valve stem (7) is fixed with the magnet (5). The disc valve core (2) slides in the first air passage (103). The partition (102) has a through hole for connecting the first air passage (103) and the second air passage (104). The valve core assembly controls the opening and closing of the through hole under the push of the magnet (5).

4. An electromagnetic gas emergency shut-off valve according to claim 3, characterized in that A second conical sealing ring (12) is fixedly provided on the side of the through hole facing the disc valve core (2). A second annular conical surface (202) is provided on the disc valve core (2). The second annular conical surface (202) is located on the side of the disc valve core (2) close to the second conical sealing ring (12).

5. An electromagnetic gas emergency shut-off valve according to claim 3, characterized in that A sealing disc (8) is provided between the cavity (101) and the housing (3). A central hole is provided at the center of the sealing disc (8). The valve stem (7) slides relative to the sealing disc (8) through the central hole. Several annular grooves are provided between the inner wall of the central hole and the valve stem (7). A sealing ring is provided in each annular groove.

6. An electromagnetic gas emergency shut-off valve according to claim 5, characterized in that, A spring (9) is provided between the sealing disc (8) and the magnet (5).

7. An electromagnetic gas emergency shut-off valve according to claim 4, characterized in that The disc valve core (2) is also provided with a first annular conical surface (201), which is located on the side opposite to the second annular conical surface (202). A first conical sealing ring (11) is fixedly provided above the first annular conical surface (201), and the first conical sealing ring (11) is fixed on the cavity (101).

8. The electromagnetic gas emergency shut-off valve according to claim 1, characterized in that The manual control lever also includes a knob (10), which is fixed to the second threaded portion (603) on the second threaded portion (603).

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