Electromagnetic type gas emergency cut-off valve

Abstract

An upper valve cover is fixedly connected to the upper portion of the middle of a valve body in a sealed mode, the two sides of the valve body are the gas inlet end and the gas outlet end respectively, a valve cup is arranged in the middle of the valve body, a valve element is arranged above the valve cup and used for opening and closing the top of the valve cup, and the upper end of the valve element is connected with an execution assembly. The execution assembly is used for providing upward power for the valve element, a metal shell is arranged on the outer side of the execution assembly, and the metal shell is fixedly connected with the upper valve deck in a sealed mode. The stop valve cannot be manually opened in a power-off state, the valve can only be manually opened when power supply recovers, related safety management specifications are met, in addition, when the stop valve is manually opened, even if the gas inlet end has large pressure, gas at the gas inlet end can flow to the gas outlet end by firstly driving the fin plate of the valve clack shaft to move upwards, and the safety of the stop valve is improved. The pressure difference between the two ends is reduced, the valve clack is pulled to open the stop valve in a more labor-saving mode, time and labor are saved, operation is convenient and fast, and in addition, an anti-explosion structure is arranged, and safety and reliability are higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnetic valve, especially relates to an electromagnetic gas emergency shut-off valve. BACKGROUND

[0002] The electromagnetic gas emergency shut-off valve is generally used for controlling the on-off of the pipeline on the natural gas pipeline, is generally used in cooperation with the alarm, is used for cutting off the pipeline in the equipment failure, seal failure, leakage or emergency, and the accident range is avoided from expanding. At present, the national compulsory standard GB 44016-2024 electromagnetic gas emergency shut-off valve is introduced, wherein the normally closed type requires that the valve is continuously powered and is in the open state when normally working, can be automatically closed when receiving the power-off valve closing signal, cannot be manually opened under the power-off state, can be manually opened when the power supply is restored, and can be automatically closed when receiving the power-off valve closing signal again. In the existing product, part of the valves can be manually opened under the power-off condition, which does not comply with the relevant safety management specification, and in addition, when the valve is opened, the inlet end of the valve is full of gas and the outlet end has no gas, the gas pressure is relatively large on the valve disc, at this time, the manual opening of the valve is relatively laborious, especially for the large-diameter valve, the front valve needs to be closed, which is time-consuming and laborious. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing an electromagnetic gas emergency shut-off valve to solve the technical problems in the background art.

[0004] To achieve the above-mentioned purpose, the specific technical scheme of the utility model of an electromagnetic gas emergency shut-off valve is as follows:

[0005] An electromagnetic gas emergency shut-off valve, the upper valve cover is fixedly and sealingly connected to the upper part of the middle part of the valve body, the inlet end and the outlet end are respectively arranged at the two sides of the valve body, the valve cup is arranged in the middle of the valve body, the valve core is arranged above the valve cup, the valve core is used for opening and closing the top of the valve cup, the upper end of the valve core is connected with the execution assembly, the execution assembly is used for providing upward power for the valve core, the outer side of the execution assembly is provided with the metal shell, and the metal shell is fixedly and sealingly connected with the upper valve cover;The valve core comprises a valve flap shaft, the upper end of the valve flap shaft is provided with a fin plate, the valve flap is sleeved on the valve flap shaft below the fin plate, the lower end of the valve flap shaft is connected with a gas guide nut, a gap is reserved between the valve flap and the valve flap shaft, the valve flap can relatively move between the fin plate and the gas guide nut, the valve flap is disc-shaped, the diameter of the valve flap is greater than that of the corresponding valve cup, the reset spring is arranged between the upper valve cover and the fin plate, the reset spring is sleeved on the outer side of the core shaft, corresponding recesses are arranged on the corresponding upper side surfaces of the valve flap and the valve flap shaft fin plate in contact with each other, and sealing rubber rings are arranged in the recesses.

[0006] Furthermore, the actuating component includes a metal housing that is sealed and fixedly connected above the upper valve cover. A base plate is threadedly connected to the lower part of the metal housing. The outer side of the base plate is threadedly connected to the inner side of the metal housing, and the inner side of the base plate is threadedly connected to the lower outer side of the copper tube. A coil is fitted on the outer side of the copper tube, and the coil is connected to the outside via a power line. An iron core is provided inside the copper tube, and an upper cover plate is provided at the upper end of the iron core. The upper cover plate is provided with a limiting groove corresponding to the copper tube. The upper end of the copper tube is inserted into the limiting groove of the upper cover plate. A sealing cover is provided above the upper cover plate, and the sealing cover is fixedly and sealedly connected to the top of the metal housing. The lower end of the iron core inside the copper tube is fixedly connected to the upper end of the mandrel, and the upper end of the iron core is fixedly connected to the lower end of the small shaft. The iron core can move up and down relative to each other inside the copper tube. The small shaft extends upward to the outer side of the sealing cover. A through hole corresponding to the small shaft is provided on the sealing cover. Similarly, a groove and a sealing ring are provided inside the through hole. A shaft cap is fixedly connected to the top of the small shaft.

[0007] Furthermore, the air guide nut is provided with an air guide groove; a sealing gasket is provided at the bottom of the valve disc and at the position corresponding to the upper port of the valve cup. The sealing gasket is annular and is fixedly connected to the valve disc.

[0008] Furthermore, a stepped hole is provided in the middle of the upper valve cover, and a connector is provided in the stepped hole. A groove and a sealing ring are provided on the platform surface of the stepped hole of the upper valve cover. The connector is locked in the stepped hole, and its lower end extends downward through the upper valve cover. The lower end of the connector is fixedly connected to the upper valve cover by a connecting nut. In addition, a through hole is provided in the middle of the connector, and the upper end of the spindle passes through the through hole and is fixedly connected to the actuator. Correspondingly, a groove and a sealing ring are provided on the side wall of the through hole in the middle of the connector.

[0009] Furthermore, a dust cover is provided on the upper part of the sealing cover. The dust cover is detachably and sealingly connected to the sealing cover. The dust cover can seal the small shaft and shaft cap in the dust cover. The power line of the coil is equipped with a seal in the wire hole. The power line passes through the seal and is then tightened by a nut to squeeze the seal, so that the seal and the power line fit tightly together.

[0010] This utility model discloses an electromagnetic gas emergency shut-off valve, which has the following advantages: It is continuously powered and open during normal operation; it automatically closes upon receiving a power failure signal; it cannot be manually opened during a power failure; and can only be manually opened when power is restored, complying with relevant safety management regulations. Furthermore, when manually opening the shut-off valve, even with high pressure at the inlet end, the valve disc shaft's fins can be moved upwards first, allowing gas to flow from the inlet to the outlet end, reducing the pressure difference and making it easier to pull the valve disc open. This saves time and effort, and is convenient to operate without needing to close the upper valve. In addition, the metal casing, base plate, top cover plate, and sealing plate together form an explosion-proof structure, completely enclosing the coil, iron core, etc., within the metal casing, isolating the internal space of the shut-off valve from the surrounding environment, thus providing explosion-proof protection and greater safety and reliability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the shut-off valve of this utility model;

[0012] Figure 2 This is a cross-sectional view of the shut-off valve of this utility model;

[0013] Figure 3 This is a cross-sectional view of the valve core of this utility model;

[0014] Figure 4 This is a cross-sectional view of the execution component of this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the air guide nut of this utility model;

[0016] The markings in the diagram are as follows: 1. Valve body; 11. Inlet end; 12. Outlet end; 13. Valve cup; 2. Upper valve cover; 3. Valve core; 31. Valve disc shaft; 32. Valve disc; 33. Air guide nut; 331. Air guide groove; 34. Spindle; 35. Return spring; 36. Connector; 37. Sealing gasket; 4. Actuating component; 41. Metal housing; 42. Base plate; 43. Copper tube; 44. Upper cover plate; 45. Coil; 46. Iron core; 47. Small shaft; 48. Sealing cover; 49. Shaft cap; 5. Dust cap. Detailed Implementation

[0017] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of an electromagnetic gas emergency shut-off valve.

[0018] like Figures 1-5As shown, the electromagnetic gas emergency shut-off valve of this utility model includes a valve body 1, an upper valve cover 2 fixedly and sealed to the upper part of the middle of the valve body 1, an inlet end 11 and an outlet end 12 on both sides of the valve body 1, a valve cup 13 is provided in the middle of the valve body 1, and a valve core 3 is provided above the valve cup 13. The valve core 3 is used to switch the top of the valve cup 13, that is, to switch the valve body 1, and to control the flow of fluid. An actuator 4 is connected to the upper end of the valve core 3. The actuator 4 is used to provide upward power to the valve core 3. A metal shell 41 is provided on the outside of the actuator 4. The metal shell 41 is fixedly and sealed to the upper valve cover 2.

[0019] Specific examples Figures 2-3 As shown, the valve core 3 includes a valve disc shaft 31, with a valve disc 32 connected to the lower part of the valve disc shaft 31. A spindle 34 is fixedly connected to the upper end of the valve disc shaft 31, and the spindle 34 passes through the upper valve cover 2 and is fixedly connected to the actuator 4. Specifically, a fin is provided on the upper end of the valve disc shaft 31, and the valve disc 32 is fitted onto the valve disc shaft 31 on the lower side of the fin. A vent nut 33 is connected to the lower end of the valve disc shaft 31, which serves to limit the movement of the valve disc 32. The valve disc 32 and the valve disc shaft 31... A gap is left between the valve disc 32 and the fin, allowing the valve disc 32 to move relative to the fin and the air guide nut 33. The valve disc 32 is disc-shaped, and its diameter is larger than that of the corresponding valve cup 13. It is used to seal or open the upper port of the valve cup 13. A return spring 35 is provided between the upper valve cover 2 and the fin. The return spring 35 is fitted on the outside of the spindle 34. The return spring 35 provides downward pressure, causing the fin to squeeze the valve disc 32, thereby sealing the upper port of the valve cup 13. In addition, to ensure the sealing of valve body 1, a corresponding groove is provided on the upper side of valve disc 32 where it contacts the fin of valve disc shaft 31. A sealing ring is provided in the groove. In the closed state, the fin of valve disc shaft 31 is pressed down on valve disc 32 under the action of return spring 35. The sealing ring is located between the fin and valve disc 32, ensuring its sealing performance. A stepped hole is provided in the middle of upper valve cover 2. A connector 36 is provided in the stepped hole. A groove and a sealing ring are provided on the platform surface of the stepped hole of upper valve cover 2. Connector 36 is locked in the stepped hole. The lower end extends downward through the upper valve cover 2. The lower end of connector 36 is fixedly connected to upper valve cover 2 by connecting nut. In addition, a through hole is provided in the middle of connector 36. The upper end of spindle 34 passes through the through hole and is fixedly connected to actuator 4. Correspondingly, a groove and a sealing ring are provided on the side wall of the through hole in the middle of connector to ensure the sealing performance between connector and spindle 34.

[0020] Specific examples Figure 2 and Figure 4As shown, the actuating component 4 includes a metal housing 41 that is sealed and fixedly connected above the upper valve cover 2. A base plate 42, which is annular, is threadedly connected to the lower part of the metal housing 41. The outer side of the base plate 42 is threadedly connected to the inner side of the metal housing 41, and the inner side of the base plate 42 is threadedly connected to the lower outer side of the copper tube 43. A coil 45 is fitted onto the outer side of the copper tube 43, and the coil 45 is connected to the outside via a power cord. The copper tube 43 serves to conduct heat and cool the coil 45, preventing it from overheating due to prolonged operation. An iron core 46 is installed inside the copper tube 43, and an upper cover plate 44 is installed at the upper end of the iron core 46. A corresponding part of the copper tube 43 is mounted on the upper cover plate 44. The upper end of the copper tube 43 is inserted into the limiting groove of the upper cover plate 44. A sealing cover 48 is provided above the upper cover plate 44. The sealing cover 48 is fixedly and sealed to the top of the metal shell 41. The lower end of the iron core 46 inside the copper tube 43 is fixedly connected to the upper end of the spindle 34. The upper end of the iron core 46 is fixedly connected to the lower end of the small shaft 47. The iron core 46 can move up and down relative to each other inside the copper tube 43. The small shaft 47 extends upward to the outside of the sealing cover 48. Correspondingly, a through hole is provided on the sealing cover 48, which is also provided with a groove and a sealing ring inside the through hole to ensure the sealing between the small shaft 47 and the sealing cover 48. A shaft cap 49 is fixedly connected to the top of the small shaft 47.

[0021] Under normal use, the shut-off valve is continuously energized. Under normal energization, the solenoid valve remains open. When power is off, the shut-off valve closes. Manual intervention is required to reopen the valve after power is restored. Specifically, under normal energization, coil 45 is connected to an external power source, generating electromagnetic force that causes an upward magnetic force on the iron core 46. This keeps the iron core 46 within the copper tube 43 in contact with the upper cover plate 44. At this time, the return spring 35 of the valve core 3 is compressed, and the valve disc 32 moves away from the upper port of the valve cup 13, thus maintaining the valve's openness and fluid flow. However, when the alarm detects a gas leak or other danger, the shut-off valve is de-energized. When the coil 45 is de-energized, it does not generate the corresponding electromagnetic force. Under the action of the return spring 35, the valve disc shaft 31 and the valve disc 32 move downward until the valve disc 32 touches the upper end of the valve cup 13 port, thus sealing the valve cup 13 port, which is to cut off the valve. However, the danger is eliminated, and it needs to be reopened after being energized. This requires manual intervention. After being energized, the coil 45 generates electromagnetic force, but this electromagnetic force cannot directly attract the iron core 46 upward. It is necessary to manually pull the shaft cap 49 upward to drive the iron core 46, the spindle 34, and the valve disc 32 to overcome the resistance of the return spring 35 and move upward. The electromagnetic force generated by the additional coil 45 causes the iron core 46 to be attracted to the upper cover plate 44, thereby realizing the opening of the valve.

[0022] Furthermore, when the valve is open, and the inlet 11 is filled with gas, pulling the sash cap 49 upwards requires overcoming the pressure of the gas on the valve disc 32. When the gas pressure is high, the pressure on the valve disc 32 will also be high, which may result in difficulty pulling the sash cap 49, or even making it impossible to pull it. In the valve core 3 of the shut-off valve of this application, the valve disc 32 can move relative to the valve disc shaft 31, and the force-bearing area of ​​the fins of the valve disc shaft 31 is smaller than that of the valve disc 32. Therefore, the gas pressure on the fins is less than the gas pressure on the valve disc 32. When the shaft cap 49 is pulled upward, the valve disc shaft 31 is first pulled upward. When a gap is formed between the fin of the valve disc shaft 31 and the upper side of the valve disc 32, gas can enter the outlet end 12 through the gap between the fin of the valve disc shaft 31 and the side of the valve disc shaft 31, as well as the gap between the valve disc 32 and the lower side of the valve disc shaft 31. This balances part of the pressure difference between the two sides, reducing the pressure on the valve disc 32. As it continues to rise, the nut at the bottom of the valve disc shaft 31 contacts the valve disc 32, causing the valve disc 32 to move upward together, thereby opening the valve and realizing the opening of the valve.

[0023] Furthermore, in order to prevent gas flow during the upward lifting of the valve disc shaft 31, the air guide nut 33 contacts the bottom surface of the valve disc 32, thus blocking the flow of gas. Figure 5 As shown, an air guide groove 331 is provided on the air guide nut 33. Even if the nut contacts the bottom of the valve disc 32, the gas can still flow from the air guide groove 331 to the air outlet 12, thereby reducing the pressure difference between the air inlet 11 and the air outlet 12. This makes the shut-off valve easier and less strenuous to open, and the shut-off valve can be manually opened without closing the front valve.

[0024] In addition, to further ensure the shut-off effect of the shut-off valve when closed, a sealing gasket 37 is provided at the bottom of the valve disc 32 corresponding to the upper port of the valve cup 13. The sealing gasket 37 is annular and is fixedly connected to the valve disc 32. When the shut-off valve is closed, the valve disc 32 moves downward, and the sealing gasket 37 contacts the side wall of the upper port of the valve cup 13 and seals the valve cup 13, so that the sealing effect is better when the shut-off valve is closed.

[0025] A dust cover is also provided on the upper part of the sealing cover 48. The dust cover is detachably and sealingly connected to the sealing cover 48. The dust cover can seal the small shaft 47 and the shaft cap 49 in the dust cover to prevent the small shaft 47 and the shaft cap 49 from being covered with oil and dust. When manually opening the shut-off valve, the dust cap 5 is removed, the shaft cap 49 is pulled to open the shut-off valve, and then the dust cap 5 is fastened to the sealing cover 48.

[0026] Furthermore, the metal casing 41, base plate 42, top cover plate 44, and sealing plate of this application together form an explosion-proof structure, which completely encloses the coil 45, iron core 46, etc., inside the metal casing 41, thus isolating the internal space of the shut-off valve from the surrounding environment and playing a role in explosion-proof. The power cord of the coil 45 of this application also has a sealing element installed in the wire hole. The power cord passes through the sealing element, and then the sealing element is squeezed by tightening the nut, so that the sealing element and the power cord fit tightly together, achieving a seal and preventing moisture, dust, etc. from entering the interior of the shut-off valve.

[0027] The electromagnetic gas emergency shut-off valve of this application is continuously powered and in the open state during normal operation. It can automatically close when it receives a power failure valve shut-off signal. It cannot be manually opened in the power failure state. When the power is restored, the valve can only be opened manually, which complies with relevant safety management regulations. In addition, in the manual opening type of this shut-off valve, even when there is a large pressure at the gas inlet 11, the valve disc shaft 31 can be moved upward by first moving the fins of the valve disc shaft 31, so that the gas at the gas inlet 11 can flow to the gas outlet 12, reducing the pressure difference between the two ends, and thus pulling the valve disc 32 to open the shut-off valve more easily. In addition, the metal shell 41, the base plate 42, the top cover plate 44, and the sealing plate together form an explosion-proof structure, which completely encloses the coil 45, iron core 46, etc. in the metal shell 41, so that the internal space of the shut-off valve is isolated from the surrounding environment, and plays a role in explosion-proof protection.

[0028] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An electromagnetic gas emergency shut-off valve, characterized in that, The valve body (1) includes an upper valve cover (2) which is fixedly and sealed above the middle part of the valve body (1). The valve body (1) has an air inlet (11) and an air outlet (12) on both sides. A valve cup (13) is provided in the middle of the valve body (1). A valve core (3) is provided above the valve cup (13). The valve core (3) is used for the switch on the top of the valve cup (13). An actuator (4) is connected to the upper end of the valve core (3). The actuator (4) is used to provide upward power to the valve core (3). A metal shell (41) is provided on the outside of the actuator (4). The metal shell (41) is fixedly and sealed to the upper valve cover (2). The valve core (3) includes a valve disc shaft (31), with a fin at the upper end of the valve disc shaft (31). The valve disc (32) is fitted onto the valve disc shaft (31) on the lower side of the fin. The lower end of the valve disc shaft (31) is connected to a gas guide nut (33). There is a gap between the valve disc (32) and the valve disc shaft (31). The valve disc (32) can move relative to the fin and the gas guide nut (33). The valve disc (32) is disc-shaped, and the diameter of the valve disc (32) is larger than the diameter of the corresponding valve cup (13). A return spring (35) is provided between the upper valve cover (2) and the fin. The return spring (35) is fitted onto the outside of the core shaft (34). A corresponding groove is provided on the upper side where the valve disc (32) contacts the fin of the valve disc shaft (31). A sealing ring is provided in the groove.

2. The electromagnetic gas emergency shut-off valve according to claim 1, characterized in that, The actuator (4) includes a metal housing (41) that is sealed and fixedly connected above the upper valve cover (2). A base plate (42) is threadedly connected to the lower part of the metal housing (41). The outer side of the base plate (42) is threadedly connected to the inner side of the metal housing (41). The inner side of the base plate (42) is threadedly connected to the lower outer side of the copper tube (43). A coil (45) is fitted on the outer side of the copper tube (43). The coil (45) is connected to the outside through a power line. An iron core (46) is provided inside the copper tube (43). An upper cover plate (44) is provided at the upper end of the iron core (46). A limiting groove corresponding to the copper tube (43) is provided on the upper cover plate (44). The upper end of the copper tube (43) is inserted into the groove. Inside the limiting groove of the upper cover plate (44), a sealing cover (48) is provided above the upper cover plate (44). The sealing cover (48) is fixedly and sealed to the top of the metal shell (41). The lower end of the iron core (46) inside the copper tube (43) is fixedly connected to the upper end of the spindle (34). The upper end of the iron core (46) is fixedly connected to the lower end of the small shaft (47). The iron core (46) can move up and down relative to each other inside the copper tube (43). The small shaft (47) extends upward to the outside of the sealing cover (48). Correspondingly, a through hole corresponding to the small shaft (47) is provided on the sealing cover (48). Similarly, a groove and a sealing ring are provided inside the through hole. A shaft cap (49) is fixedly connected to the top of the small shaft (47).

3. The electromagnetic gas emergency shut-off valve according to claim 2, characterized in that, The air guide nut (33) is provided with an air guide groove (331).

4. The electromagnetic gas emergency shut-off valve according to claim 3, characterized in that, A sealing gasket (37) is provided at the bottom of the valve disc (32) and at the position corresponding to the upper port of the valve cup (13). The sealing gasket (37) is annular and is fixedly connected to the valve disc (32).

5. An electromagnetic gas emergency shut-off valve according to claim 4, wherein a stepped hole is provided in the middle of the upper valve cover (2), a connector (36) is provided in the stepped hole, a groove and a sealing ring are provided on the platform surface of the stepped hole of the upper valve cover (2), the connector (36) is engaged in the stepped hole, the lower end extends downward through the upper valve cover (2), and the lower end of the connector (36) is fixedly connected to the upper valve cover (2) by a connecting nut. In addition, a through hole is provided in the middle of the connector (36), the upper end of the spindle (34) passes through the through hole and is fixedly connected to the actuator (4). Correspondingly, a groove and a sealing ring are provided on the side wall of the through hole in the middle of the connector.

6. An electromagnetic gas emergency shut-off valve according to claim 5, characterized in that, The upper part of the sealing cover (48) is also provided with a dust cover, which is detachably and sealingly connected to the sealing cover (48). The dust cover can seal the small shaft (47) and the shaft cap (49) in the dust cover.

7. An electromagnetic gas emergency shut-off valve according to claim 6, characterized in that, The power cord of the coil (45) is fitted with a seal in the wire hole. The power cord passes through the seal and is then tightened by a nut to compress the seal, so that the seal fits tightly against the power cord.

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