Automatic closing device for natural gas valve

Abstract

This invention discloses an automatic closing device for a natural gas valve, comprising a valve body, a self-locking rod, a valve core sleeve, and a reset elastic element. A ball valve is housed within the valve body, and a rotating valve core is connected to the ball valve. The self-locking rod axially slides and nests the rotating valve core. The valve core sleeve axially slides and fits around the rotating valve core and the self-locking rod. The reset elastic element is nested within the self-locking rod and abuts against the self-locking rod and the rotating valve core. The rotating valve core has a helical guide groove, and the inner wall of the valve core sleeve has a linear guide groove. The helical guide groove and the linear guide groove are connected by a transmission component. When the self-locking rod is pressed down, the transmission component slides along the helical guide groove, driving the rotating valve core to rotate the ball valve in the forward direction. An electromagnetic drive assembly locks the self-locking rod. When the electromagnetic drive assembly retracts, the reset elastic element drives the self-locking rod to reset and causes the rotating valve core to rotate in the reverse direction. This device provides dual protection of automatic monitoring and manual emergency response, significantly improving the safety of natural gas use.

Description

Technical Field

[0001] This invention belongs to the field of gas safety control technology, specifically relating to an automatic closing device for natural gas valves. Background Technology

[0002] In residential and commercial natural gas usage scenarios, gas leaks are a major safety hazard that can lead to fires, explosions, and other accidents. Traditional natural gas valves are mostly manually controlled, which presents the following problems: (1) If the user forgets to close the valve or misoperates the valve, the valve may remain open for a long time, which may easily lead to the risk of gas leakage. (2) In the event of an emergency such as a gas leak or fire, the gas supply cannot be cut off quickly and automatically, delaying the opportunity for emergency response; (3) Traditional mechanical valves lack intelligent monitoring and automatic control functions and rely solely on manual inspection, making it difficult to achieve 24-hour safety protection, especially in unattended scenarios where safety hazards are prominent. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic closing device for natural gas valves to solve the problems of valves failing to close automatically, lagging safety protection, and low level of intelligence in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An automatic closing device for a natural gas valve, comprising: The valve body contains a rotatable ball valve. A rotary valve core, one end of which is connected to the ball valve, has a spiral guide groove that spirals radially along the axial direction; A self-locking pressure rod is axially slidably sleeved on the other end of the rotary valve core; The valve core sleeve is axially slidably sleeved on the outer periphery of the rotary valve core and the self-locking pressure rod, and has a straight guide groove opened along the axial direction; A reset elastic element is nested inside the self-locking rod, and its two ends abut against the self-locking rod and the rotary valve core, respectively; it is used to drive the self-locking rod to move axially upward when it stores force and releases force when it moves axially downward. The transmission component passes through the valve core sleeve and is slidably embedded in the spiral guide groove and the linear guide groove; An electromagnetic drive assembly extends into the valve core sleeve at one end to extend and stop the self-locking pressure rod from moving upward. The self-locking lever moves downward, causing the transmission component to drive the rotary valve core to rotate in the forward direction. The electromagnetic drive assembly extends to stop the self-locking lever. When the electromagnetic drive assembly retracts, the self-locking lever is driven upward by the reset elastic element, causing the rotary valve core to rotate in the reverse direction.

[0005] Furthermore, the electromagnetic drive assembly includes a push-pull electromagnet and an elastic stop, wherein the elastic stop is connected to the output end of the push-pull electromagnet and extends into the valve core sleeve to stop the self-locking pressure rod.

[0006] Furthermore, it also includes a guide rod, which is connected to the output end of the push-pull electromagnet and is used to manually control the extension and retraction of the push-pull electromagnet.

[0007] Furthermore, a stop locking member is provided on the outer periphery of the self-locking pressure rod. The stop locking member is used to stop the self-locking pressure rod from moving downward and is stopped from moving upward by the elastic stop member.

[0008] Furthermore, the transmission component includes a pin, one end of which passes through the self-locking pressure rod and is embedded in the spiral guide groove, and the other end of which is embedded in the linear guide groove.

[0009] Furthermore, the starting end of the spiral guide groove corresponds to the circumferential angle when the ball valve is in the closed position, and the ending end corresponds to the circumferential angle when the ball valve is in the fully open position. The length of the spiral guide groove is configured such that the rotation angle of the rotary valve core is 90°.

[0010] Furthermore, it also includes a toggle switch, which is connected to the guide rod, and the guide rod is driven to move by toggling the toggle switch.

[0011] Furthermore, the lower end of the stop locking member has a first arc-shaped surface and the upper end has a second flat surface. The lower end of the elastic stop member has a second flat surface that stops opposite to the first flat surface and the upper end has a second arc-shaped surface that fits into the first arc-shaped surface.

[0012] Furthermore, the elastic stop is a spring pin, and the reset elastic element is a spring.

[0013] Furthermore, it also includes an electrical mounting box, in which the push-pull electromagnet is disposed, and one end of the guide rod extends out of the electrical mounting box.

[0014] Furthermore, the outer periphery of the self-locking pressure rod is provided with a hole shaft, the pin shaft is embedded in the hole shaft, and the hole shaft is slidably embedded in the linear guide groove.

[0015] Because the present invention adopts the above technical solution, it has the following advantages and effects: The present invention provides an automatic closing device for a natural gas valve. Through the cooperation of a transmission component, a linear guide groove, and a spiral guide groove, the axial linear displacement of the self-locking pressure rod is converted into a precise 90° rotation of the valve core. This device not only has a compact structure and avoids the dead point problem of traditional linkage mechanisms, but also achieves a mechanical self-locking function of "opening under pressure and locking automatically". It can maintain the open state without continuous power consumption, which greatly reduces energy consumption and failure rate.

[0016] This invention provides an automatic natural gas valve closing device. Relying on the cooperation of an electromagnetic drive component and a reset elastic element, upon receiving a hazard signal, it can instantly release the self-locking lever and release energy to drive the rotary valve core and ball valve to rotate in the opposite direction and reset, thereby quickly cutting off the gas source and preventing gas leaks and safety accidents caused by forgetting to turn off the gas. At the same time, it can realize real-time monitoring of the gas status in the air, reducing the cost of 24-hour manual inspection, breaking through the limitation of traditional valves that can only be manually operated, and greatly improving the safety and intelligence level of natural gas use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional perspective structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the front perspective structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the electromagnetic drive component structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the rotary valve core structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the self-locking pressure bar structure of the present invention.

[0022] In the diagram: 1-Self-locking lever, 101-Stop locking element, 102-Hole shaft, 2-Reset elastic element, 3-Electrical mounting box, 4-Push-pull electromagnet, 5-Rotary valve core, 501-Spiral guide groove, 6-Connecting plate, 7-Gas pipeline, 8-Valve body, 9-Ball valve, 10-Bearing, 11-Valve core sleeve, 12-Pin shaft, 13-Toggle switch, 14-Elastic stop element, 15-Guide rod. Detailed Implementation

[0023] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the purpose, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative of the essential spirit of the technical solution of the present invention.

[0024] like Figures 1-5As shown, this invention provides an automatic natural gas valve closing device, which includes a valve assembly, a self-locking actuation assembly, an electromagnetic drive assembly, an unlocking linkage assembly, and a reset elastic element 2. The valve assembly includes a valve body 8 and a ball valve 9. The ball valve 9 is rotatably disposed within the valve body 8, and a first sealing ring is provided between the valve body 8 and the ball valve 9. Both ends of the valve body 8 are respectively connected to a gas pipeline 7. The ball valve 9 controls the opening and closing of the valve body 8 by its own rotation, so as to realize the control of the flow or cut-off of natural gas in the gas pipeline 7 through the valve assembly.

[0025] The self-locking actuator is located at the upper end of the valve assembly and is connected to the valve assembly in a T-shape. The self-locking actuator includes a valve core sleeve 11, a self-locking rod 1, and a rotary valve core 5. The self-locking rod 1 is axially slidably nested within the valve core sleeve 11. One end of the rotary valve core 5 is slidably nested inside one end of the self-locking rod 1, and the other end extends out of the valve core sleeve 11 and is fixedly connected to the ball valve 9. The self-locking rod 1 is slidably connected to the rotary valve core 5 and the valve core sleeve 11 through a transmission component, and is used to convert the axial movement of the self-locking rod 1 into the rotational movement of the rotary valve core 5.

[0026] The reset elastic element 2 is disposed on the inner circumference of the self-locking rod 1 and located at the upper end of the rotary valve core 5. It is used to store force when the self-locking rod 1 moves downward, and can also release force to drive the self-locking rod 1 to move upward and reset. The reset elastic element 2 is preferably a spring.

[0027] An electromagnetic drive assembly is disposed on the upper end of the valve assembly and located on the outer periphery of the self-locking actuator assembly. The electromagnetic drive assembly includes a push-pull electromagnet 4 and an elastic stop 14. The elastic stop 14 is connected to the output end of the push-pull electromagnet 4 and extends into the valve core sleeve 11 to stop the self-locking pressure rod 1.

[0028] The present invention employs a pair of electromagnetic drive components, which are arranged symmetrically on both sides of the self-locking actuator.

[0029] When the self-locking lever 1 is pressed down, it drives the rotary valve core 5 through the transmission component, causing the ball valve 9 to rotate in the forward direction, opening the valve assembly. At this time, the self-locking lever 1 is locked by the elastic stop 14, and the reset elastic element 2 stores force. When the push-pull electromagnet 4 is energized, it drives the elastic stop 14 to retract, releasing the lock on the self-locking lever 1. At this time, the self-locking lever 1 is driven upward by the release force of the reset elastic element 2 to reset and drive the ball valve 9 to rotate in the reverse direction to reset, closing the valve assembly.

[0030] This invention enables the valve assembly to automatically and quickly close in emergency situations such as gas leaks and fires through self-locking, thus avoiding safety accidents caused by gas leaks and forgetting to turn off the gas.

[0031] Specifically, the valve core sleeve 11 has a through hole at its center, and the self-locking rod 1 is axially slidably nested in the through hole. One end of the self-locking rod 1 has a first blind hole, and the reset elastic element 2 and the upper end of the rotary valve core 5 are nested in the first blind hole. The rotary valve core 5 is a stepped rod, and its lower end extends out of the valve core sleeve 11, passes through the valve body 8, and is connected to the ball valve 9 inside the valve body 8 via tenon or key. The rotary valve core 5 and the valve body 8 are sealed by a second sealing ring. The lower end of the rotary valve core 5 is slidably connected to the valve body 8 via a bearing 10.

[0032] The push-pull electromagnet 4 consists of a fixed iron core, a coil, a housing, a return spring, and a moving iron core. When energized, current flows through the coil, generating a strong magnetic field. Under the influence of this magnetic field, the moving iron core experiences electromagnetic attraction and moves axially in a linear motion towards the fixed iron core, thereby driving the elastic stop 14 to push outward or pull inward. When de-energized, the coil's magnetic field disappears, and the electromagnetic attraction vanishes. At this time, the return spring, relying on its own elasticity, pushes the moving iron core back to its initial stationary position, thus completing the reciprocating linear motion of energization and de-energization reset.

[0033] Furthermore, the present invention also includes an unlocking linkage component for manually closing the valve assembly in an emergency. The unlocking linkage component includes a guide rod 15, which is connected to the output end of the push-pull electromagnet 4. The guide rod 15 and the output end of the push-pull electromagnet 4 are perpendicularly connected. In an emergency, the user can push the guide rod 15 to directly drive the output end of the push-pull electromagnet 4, thereby causing the elastic stop 14 to retract, thus mechanically unlocking and closing the valve assembly.

[0034] Furthermore, to facilitate the self-locking of the self-locking lever 1, a stop locking member 101 is provided on the outer periphery of the upper end of the self-locking lever 1. The stop locking member 101 is used to push away the elastic stop member 14 when the self-locking lever 1 moves downward, and is stopped from moving upward by the elastic stop member 14. The elastic stop member 14 can be reset by the reaction force of its own elasticity, realizing the operation of one-way passage and reverse self-locking, thereby keeping the valve assembly in the open state.

[0035] As a preferred embodiment, the stop locking member 101 is a stop flange, which is circumferentially sleeved on the outer periphery of the self-locking pressure rod 1.

[0036] As a preferred embodiment, the stop locking member 101 is a stop plate extending from the outer periphery of the locking rod 1, and the stop plate and the elastic stop member are spaced apart from each other in the horizontal direction.

[0037] Furthermore, the transmission component includes pins 12, and linear guide grooves are provided on the axially opposite sides of the inner wall of the through hole of the valve core sleeve 11. The rotary valve core 5 has a radially penetrating spiral guide groove 501, which is spirally wound along the radial direction of the rotary valve core 5. After a pair of pins 12 pass through the inner walls of the two sides of the self-locking rod 1, one end of their inner end is embedded in the spiral guide groove 501, and the other end of their outer end is embedded in the linear guide groove. The pins 12 are used to extend into the spiral guide groove 501 and slide along the linear guide groove when the self-locking rod 1 moves axially, thereby driving the rotary valve core 5 to rotate.

[0038] Specifically, straight guide grooves are respectively opened on both opposite sides of the through hole of the valve core sleeve 11, and a second blind hole is opened at one end of the rotary valve core 5. The spiral guide groove 501 radially passes through the second blind hole. The spiral guide groove 501 has a starting end and a ending end. The starting end is located at the circumferential position of the rotary valve core 5 corresponding to the ball valve 9 in the closed position, and the ending end is located at a position deflected by 90° in the rotation direction, corresponding to the circumferential position of the ball valve 9 in the fully open position. The length of the spiral guide groove 501 is such that when the pin 12 slides from the starting end to the ending end, it can drive the rotary valve core 5 to rotate 90° around the axis.

[0039] When the self-locking lever 1 slides downward along the valve core sleeve 11 under force, the pin 12 can only move axially due to the constraint of the linear guide groove, which forces the pin 12 to slide in the spiral guide groove 501, thereby driving the rotary valve core 5 to produce a precise 90-degree rotation.

[0040] Furthermore, the outer periphery of the self-locking rod 1 is provided with a hole shaft 102 on both opposite sides, and a pair of pins 12 are respectively embedded in the pair of hole shafts 102 and fixed by a button. The hole shafts 102 slide along a pair of linear guide grooves.

[0041] Furthermore, the lower end of the stop locking member 101 has a first arc-shaped surface portion, and the upper end has a second flat surface portion; correspondingly, the lower end of the elastic stop member 14 has a second flat surface portion that stops opposite to the first flat surface portion, and the upper end has a second arc-shaped surface portion that slides and fits against the first arc-shaped surface portion. This surface contact fit ensures the stability of self-locking and the smoothness of unlocking.

[0042] Furthermore, the electromagnetic drive assembly also includes an electrical mounting box 3, which is located adjacent to and fitted to the valve core sleeve 11 on its outer periphery. The valve core sleeve 11 and the electrical mounting box 3 are fixed together by screws. The lower end of the electrical mounting box 3 is connected to the gas pipeline 7 via a connecting plate 6. A push-pull electromagnet 4 is disposed inside the electrical mounting box 3, and one end of the guide rod 15 extends horizontally out of the electrical mounting box 3.

[0043] Furthermore, to facilitate operation of the guide rod 15, the unlocking linkage assembly also includes a toggle switch 13. The toggle switch 13 is connected to the end of the guide rod 15. By toggling the toggle switch 13, the guide rod 15 is driven to move axially, thereby causing the elastic stop 14 to retract. Through slots are provided on both sides of the electrical mounting box 3, and the guide rod 15 extends into these slots. The toggle switch 13 is slidably embedded in the through slots and connected to the guide rod 15. The toggle switch 13 and the guide rod 15 are connected by threads. By toggling the toggle switch 13, the guide rod 15 slides back and forth along the through slots on the electrical mounting box 3.

[0044] Furthermore, the elastic stop 14 includes a stop part, a fixed end, a connecting rod, and a telescopic spring. The fixed end is connected to the telescopic end of the push-pull electromagnet 4. One end of the connecting rod is slidably nested in the fixed end, and the other end is connected to the stop part. The telescopic spring is sleeved on the outer periphery of the connecting rod and stops between the stop part and the fixed end. The first arc-shaped surface and the first flat surface are provided at the upper and lower ends of the stop part.

[0045] As a preferred option, the elastic stop 14 is a spring pin.

[0046] Furthermore, the electrical installation box 3 is also equipped with a gas concentration sensor, a temperature sensor, and a control module. The gas concentration sensor and temperature sensor are electrically connected to the input terminal of the control module, and the output terminal of the control module is electrically connected to the push-pull electromagnet 4. When the gas concentration in the air is too high, or the ambient temperature is too high, the control module sends an energizing signal. After the push-pull electromagnet 4 is energized, it drives the elastic stop 14 to retract. The self-locking lever 1 is reset under the reaction force of the reset elastic element 2, thereby driving the rotary valve core 5 and the ball valve 9 to rotate and reset, realizing the automatic closing of the valve assembly.

[0047] The working principle of this invention is as follows: First, the valve assembly opening and self-locking process.

[0048] The user presses down on the self-locking lever 1. At this time, the reset elastic element 2 is compressed and stores force. Through the cooperation of the transmission components, when the self-locking lever 1 moves down to the bottom, the pressing action drives the rotary valve core 5 and the ball valve 9 to rotate 90 degrees in the forward direction, so that the valve assembly is fully opened. During the downward movement of the self-locking lever 1, the first arc-shaped surface of the stop locking element 101 squeezes the elastic stop element 14 to retract it. After passing through, the elastic stop element 14 resets under its own elastic force, and its second flat part just fits into the lower part of the second flat part of the stop locking element 101, thereby locking the self-locking lever 1 in the low position, realizing one-way passage and reverse self-locking, and keeping the valve assembly normally open.

[0049] Second, the valve assembly automatically senses and closes.

[0050] When no power is applied, the push-pull electromagnet 4 is in its initial position, with the elastic stop 14 extended and the device still in a self-locking state. When the gas concentration in the air is too high or the ambient temperature is too high, the gas concentration sensor or temperature sensor in the electrical mounting box 3 detects an abnormality, and the control module sends an energizing signal. The push-pull electromagnet 4 is energized and drives the elastic stop 14 to retract, releasing the lock on the stop lock 101. At this time, the reset elastic element 2 releases the stored energy, driving the self-locking lever 1 to quickly move upward and reset. During the upward movement, the transmission component drives the rotary valve core 5 to rotate 90 degrees in the opposite direction, causing the ball valve 9 to reset to the closed position, and the valve assembly automatically closes.

[0051] Third, the valve assembly can be manually shut off in an emergency.

[0052] In manual emergency shutdown, toggle switch 13 is activated. Toggle switch 13 drives guide rod 15 to retract the elastic stop 14 and the moving iron core of push-pull electromagnet 4, thereby resetting the self-locking lever 1 and closing the valve assembly. Subsequently, the return spring of push-pull electromagnet 4 is reset by reaction force, guide rod 15 moves forward, and elastic stop 14 extends, preparing for the next self-locking.

Claims

1. An automatic closing device for a natural gas valve, characterized in that, include: The valve body (8) has a rotatable ball valve (9) inside. A rotary valve core (5) is connected at one end to the ball valve (9) and has a spiral guide groove (501) spiraling around the radial direction along the axial direction. The self-locking pressure rod (1) is axially slidably sleeved on the other end of the rotary valve core (5); The valve core sleeve (11) is axially slidably sleeved on the outer periphery of the rotary valve core (5) and the self-locking pressure rod (1), and has a straight guide groove along the axial direction; The reset elastic element (2) is nested inside the self-locking pressure rod (1), and its two ends abut against the self-locking pressure rod (1) and the rotary valve core (5) respectively; it is used to drive the self-locking pressure rod (1) to move upward in the axial direction when it stores force and releases force when it moves downward in the axial direction; The transmission component passes through the valve core sleeve (11) and is slidably embedded in the spiral guide groove (501) and the linear guide groove; An electromagnetic drive assembly extends into the valve core sleeve (11) at one end to extend and stop the self-locking pressure rod (1) from moving upward. When the self-locking lever (1) moves down, it drives the transmission component to drive the rotary valve core (5) to rotate in the forward direction. The electromagnetic drive assembly extends to stop the self-locking lever (1). When the electromagnetic drive assembly retracts, the self-locking lever (1) is driven up by the reset elastic element (2) and drives the rotary valve core (5) to rotate in the reverse direction.

2. The automatic closing device for natural gas valves according to claim 1, characterized in that, The electromagnetic drive assembly includes a push-pull electromagnet (4) and an elastic stop (14). The elastic stop (14) is connected to the output end of the push-pull electromagnet (4) and extends into the valve core sleeve (11) to stop the self-locking pressure rod (1).

3. The automatic closing device for natural gas valves according to claim 2, characterized in that, It also includes a guide rod (15), which is connected to the output end of the push-pull electromagnet (4) and is used to manually control the extension and retraction of the push-pull electromagnet (4).

4. The automatic closing device for natural gas valves according to claim 3, characterized in that, The outer periphery of the self-locking pressure rod (1) is provided with a stop locking member (101). The stop locking member (101) is used to stop the elastic stop member (14) when the self-locking pressure rod (1) moves down, and is stopped from moving up by the elastic stop member (14).

5. The automatic closing device for a natural gas valve according to claim 1, characterized in that, The transmission component includes a pin (12), one end of which passes through the self-locking pressure rod (1) and is embedded in the spiral guide groove (501), and the other end is embedded in the straight guide groove; the starting end of the spiral guide groove (501) corresponds to the circumferential angle when the ball valve (9) is in the closed position, and the ending end corresponds to the circumferential angle when the ball valve (9) is in the fully open position. The length of the spiral guide groove (501) is configured such that the rotation angle of the rotary valve core (5) is 90°.

6. The automatic closing device for a natural gas valve according to claim 4, characterized in that, It also includes a toggle switch (13), which is connected to the guide rod (15), and the guide rod (15) is driven to move by toggling the toggle switch (13).

7. The automatic closing device for a natural gas valve according to claim 4, characterized in that, The lower end of the stop locking member (101) has a first arc-shaped surface and the upper end has a second flat surface. The lower end of the elastic stop member (14) has a second flat surface that stops opposite to the first flat surface and the upper end has a first arc-shaped surface that slides and fits with the second arc-shaped surface.

8. The automatic closing device for a natural gas valve according to claim 3, characterized in that, It also includes an electrical installation box (3), the push-pull electromagnet (4) is disposed inside the electrical installation box (3), and one end of the guide rod (15) extends out of the electrical installation box (3).

9. The automatic closing device for a natural gas valve according to claim 5, characterized in that, The self-locking pressure rod (1) has a hole shaft (102) on its outer periphery, and the pin shaft (12) is embedded in the hole shaft (102). The hole shaft (102) is slidably embedded in the linear guide groove.

10. The automatic closing device for a natural gas valve according to claim 7, characterized in that, The elastic stop (14) is a spring pin, and the reset elastic element (2) is a spring.

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