Gas overcurrent safety valve

Abstract

This utility model discloses a gas overflow safety valve, including a main pipe, a casing, a gas storage tank, a flow-stopping mechanism, and a microcontroller. A flow sensor is installed on the main pipe and inserted inside it. The casing is fixed to the upper side of the main pipe, and the gas storage tank is fixed to the right side of the casing. A flow-stopping mechanism extending into the main pipe connects the casing and the gas storage tank. A buzzer alarm is installed on the top of the casing. The microcontroller, power module, and relay are installed inside the casing. The buzzer alarm, flow sensor, and relay are all electrically connected to the microcontroller, and a micro motor is electrically connected to the relay. This utility model detects the gas flow through the flow sensor. When the flow exceeds a warning value, the microcontroller controls the buzzer alarm to sound and drives the flow-stopping mechanism to inflate the elastic expansion bladder to block the gas flow. It has an active shut-off function, high safety, and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically a gas overflow safety valve. Background Technology

[0002] In the field of gas pipeline safety protection, valves are one of the most common safety assurance devices. However, traditional gas self-closing valves determine whether the pipeline is under-pressured or over-pressured based on pressure data, and thus close the valve. They cannot close based on specific flow data. When an overflow anomaly occurs in the gas pipeline, they cannot quickly and reliably achieve active closure, making it difficult to immediately stop gas flow and potentially leading to safety accidents. Therefore, in response to the above situation, there is an urgent need to develop a gas overflow safety valve that detects gas flow using a flow sensor, and when the flow exceeds a warning value, a microcontroller controls a buzzer alarm and drives a flow-stopping mechanism to inflate an elastic expansion bladder to block gas flow. This valve would have an active closure function, high safety, and strong practicality, overcoming the shortcomings in current applications and meeting current needs. Utility Model Content

[0003] The purpose of this invention is to provide a gas overflow safety valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A gas overcurrent safety valve includes a main pipe, a housing, a gas storage tank, a flow-stopping mechanism, and a microcontroller. A flow sensor is installed on the main pipe and inserted inside it. The housing is fixed to the upper side of the main pipe, and the gas storage tank is fixed to the right side of the housing. A flow-stopping mechanism extending into the main pipe connects the housing and the gas storage tank. The flow-stopping mechanism includes a micro motor, a lead screw, a threaded sleeve, an adapter plate, a pressure rod, a piston disc, an air pumping pipe, and an elastic expansion bladder. The micro motor is fixed inside the housing, and its output shaft is connected to the lead screw via a coupling. The lead screw is rotatably connected to the housing. A threaded sleeve is installed on the top, and an adapter plate is installed on the right side of the threaded sleeve. A pressure rod is fixed on the right side of the adapter plate. The bottom of the pressure rod extends into the air tank and is fixed to the piston plate. The piston plate is slidably connected to the inner wall of the air tank. The top of the air pumping pipe is connected to the air tank, and the bottom of the air pumping pipe extends into the main tube and is connected to the elastic expansion air bladder. A buzzer alarm is installed on the top of the chassis. A microcontroller, a power module, and a relay are installed inside the chassis. The buzzer alarm, flow sensor, and relay are all electrically connected to the microcontroller, and the micro motor is electrically connected to the relay.

[0005] As a further embodiment of this utility model: an O-ring is fixed to the outer ring of the piston disc, and the O-ring is tightly fitted to the inner wall of the gas storage cylinder.

[0006] As a further improvement of this utility model, flanges are fixed to the left and right ends of the main tube respectively.

[0007] As a further improvement of this utility model, the elastic inflatable airbag is made of nitrile rubber.

[0008] As a further improvement of this utility model: the top of the chassis is detachably connected to an inspection cover, and the side of the chassis is provided with a manual operation window.

[0009] Beneficial Effects: This gas overflow safety valve, in use, fixes the flange to the gas pipeline with bolts. A flow sensor detects the gas flow rate and transmits the detected value to a microcontroller. When the flow rate reaches a warning value, the microcontroller activates a buzzer alarm to alert users to the abnormality. Simultaneously, the microcontroller indirectly controls a micro motor via a relay. The micro motor drives a lead screw, which in turn moves a threaded sleeve and an adapter plate. The adapter plate then moves a pressure rod and a piston disc downwards, compressing the gas into the air pipe and the elastic expansion bladder. This causes the elastic expansion bladder to inflate and block the gas flow in the main pipe, improving safety. In summary, this invention detects gas flow rate using a flow sensor. When the flow rate exceeds a warning value, the microcontroller activates a buzzer alarm and drives a flow-stopping mechanism to inflate the elastic expansion bladder, blocking gas flow. It features an active shut-off function, high safety, and strong practicality. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 This is an internal view of the main tube of this utility model.

[0012] Figure 3 This utility model Figure 2 A schematic diagram of the closed-circuit interruption state.

[0013] Figure 4 This is a partial structural cross-sectional view of the present invention.

[0014] In the diagram: 1. Main pipe; 101. Flange; 2. Chassis; 201. Inspection cover; 202. Manual operation window; 3. Buzzer alarm; 4. Air tank; 5. Flow interruption mechanism; 501. Micro motor; 502. Lead screw; 503. Threaded sleeve; 504. Adapter plate; 505. Pressure rod; 506. Piston disc; 5061. O-ring seal; 507. Air inflator; 508. Elastic expansion air bladder; 6. Flow sensor; 7. Microcontroller; 8. Power module; 9. Relay. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0017] Please see Figures 1-4In this embodiment of the utility model, the gas overflow safety valve includes a main pipe 1, a housing 2, a gas storage tank 4, a flow interruption mechanism 5, a flow sensor 6, and a microcontroller 7. The main pipe 1 is equipped with a flow sensor 6 inserted inside it, which detects the gas flow rate. The housing 2 is fixed to the upper side of the main pipe 1, and a maintenance cover 201 is detachably connected to the top of the housing 2. The gas storage tank 4 is fixed to the right side of the housing 2. A flow interruption mechanism 5 extending into the main pipe 1 is connected between the housing 2 and the gas storage tank 4. The flow interruption mechanism 5 includes: The system includes a micro motor 501, a lead screw 502, a threaded sleeve 503, an adapter plate 504, a pressure rod 505, a piston disc 506, an air inflator 507, and an elastic expansion airbag 508. The micro motor 501 is fixed inside the housing 2. The output shaft of the micro motor 501 is connected to the lead screw 502 via a coupling. The lead screw 502 is rotatably connected to the housing 2. A threaded sleeve 503 is mounted on the lead screw 502. An adapter plate 504 is mounted on the right side of the threaded sleeve 503. A pressure rod 505 is fixed to the right side of the adapter plate 504. The bottom extends into the air reservoir 4 and is fixed to the piston disc 506. The pressure rod 505 and piston disc 506 can limit the movement of the threaded sleeve 503. When the lead screw 502 rotates, the threaded sleeve 503 cannot rotate with the lead screw 502 and can only move linearly because the pressure rod 505 and piston disc 506 are installed inside the air reservoir 4. The piston disc 506 is slidably connected to the inner wall of the air reservoir 4. An O-ring seal 5061 is fixed to the outer ring of the piston disc 506. The O-ring seal 5061 fits tightly against the inner wall of the air reservoir 4 to prevent air leakage. The top of the air pumping pipe 507 is connected to the air storage cylinder 4, and the bottom of the air pumping pipe 507 extends into the main body pipe 1 and is connected to the elastic expansion air bag 508. In use, the micro motor 501 drives the lead screw 502 to rotate, the lead screw 502 drives the threaded sleeve 503 and the adapter plate 504 to move, the adapter plate 504 drives the pressure rod 505 and the piston plate 506 to move down, and the piston plate 506 compresses the gas into the air pumping pipe 507 and the elastic expansion air bag 508, so that the elastic expansion air bag 508 expands and blocks the main body pipe 1, thereby cutting off the flow of gas.

[0018] A buzzer alarm 3 is installed on the top of the chassis 2.

[0019] The chassis 2 houses a microcontroller 7, a power module 8, and a relay 9. The power module 8 supplies power to all electrical components. The buzzer alarm 3, flow sensor 6, and relay 9 are all electrically connected to the microcontroller 7 for electrical system control. The micro motor 501 is electrically connected to the relay 9. The microcontroller 7 indirectly controls the operation of the micro motor 501 through the relay 9. The microcontroller 7 has a preset gas flow warning value. When the flow sensor 6 detects that the flow has reached the warning value, the microcontroller 7 controls the flow interruption mechanism 5 to block the flow in the main pipe 1. At the same time, the microcontroller 7 controls the buzzer alarm 3 to sound an alarm to alert people to the abnormal situation.

[0020] The side of the chassis 2 is provided with a manual operation window 202, through which a person can manually control the microcontroller 7.

[0021] The elastic inflatable airbag 508 is made of nitrile rubber, giving it good elasticity and excellent oil and solvent resistance. Nitrile rubber has a Shore hardness of 70±5, a tensile strength ≥15MPa, and an elongation at break ≥300%. After expansion, it can tightly conform to the inner wall of the main pipe (fitting gap ≤0.02mm). Simultaneously, it exhibits excellent resistance to gas corrosion; after long-term contact with natural gas and liquefied petroleum gas, its elasticity decay rate is ≤8%, preventing sealing failure due to material aging.

[0022] When the elastic expansion airbag 508 is not inflated, it is flat (5mm thick). When fully inflated, its diameter can reach 52mm (greater than the inner diameter of the main tube of 50mm), forming an "interference fit". The edge of the elastic expansion airbag 508 is designed with an arc transition, which can avoid sealing gaps caused by tiny protrusions on the inner wall of the main tube and ensure complete blockage of gas flow.

[0023] When the piston disc 506 is pressed down, the compression pressure on the gas in the gas storage cylinder 4 can reach 0.8 MPa. After being transmitted to the elastic expansion bladder 508 through the air inflator 507, the pressure inside the elastic expansion bladder 508 is maintained at 0.6-0.7 MPa. This pressure allows the elastic expansion bladder 508 to tightly squeeze the inner wall of the main tube 1. The airtightness test verifies that under the reverse gas pressure of 0.4 MPa (the maximum working pressure of household gas), the gas leakage under the bladder sealing state is ≤0.01 L / h, which is far lower than the limit of "leakage ≤0.07 L / h" in the national standard "General Safety Requirements for Household Gas Appliances" (GB 16914-2020), and fully meets the sealing effect requirements.

[0024] Flanges 101 are fixed to the left and right ends of the main pipe 1, and the flanges 101 are fixed to the gas pipeline by bolts, thereby connecting the main pipe 1 to the gas pipeline.

[0025] The micro motor 501 and lead screw 502 drive is stable and reliable. Existing valves using electromagnetic drive are prone to blockage by gas impurities and valve core jamming in low temperature environments, resulting in mechanical failures that prevent the valve from closing completely.

[0026] The working principle of this utility model is as follows: When in use, the flange 101 of the gas overflow safety valve is fixed to the gas pipeline by bolts. The flow sensor 6 detects the gas flow and transmits the detection value to the microcontroller 7. When the flow reaches the warning value, the microcontroller 7 controls the buzzer alarm 3 to sound an alarm to remind people of the abnormal situation. At the same time, the microcontroller 7 indirectly controls the operation of the micro motor 501 through the relay 9. The micro motor 501 drives the lead screw 502 to rotate. The lead screw 502 drives the threaded sleeve 503 and the adapter plate 504 to move. The adapter plate 504 drives the pressure rod 505 and the piston plate 506 to move down. The piston plate 506 compresses the gas into the air pump pipe 507 and the elastic expansion bladder 508, causing the elastic expansion bladder 508 to expand and block the main pipe 1, thereby improving safety.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas overcurrent safety valve, characterized in that: The system includes a main tube (1), a chassis (2), an air tank (4), a flow interruption mechanism (5), and a microcontroller (7). A flow sensor (6) is installed on the main tube (1) and inserted into it. The chassis (2) is fixed to the upper side of the main tube (1), and the air tank (4) is fixed to the right side of the chassis (2). A flow interruption mechanism (5) extending into the main tube (1) is connected between the chassis (2) and the air tank (4). The flow interruption mechanism (5) includes: a micro motor (501), a lead screw (502), a threaded sleeve (503), an adapter plate (504), a pressure rod (505), a piston disc (506), an air pumping pipe (507), and an elastic expansion airbag (508). The micro motor (501) is fixed inside the chassis (2). The output shaft of the micro motor (501) is connected to the lead screw (502) through a coupling. The lead screw (502) is rotatably connected to the chassis (2). 02) A threaded sleeve (503) is installed on the top. An adapter plate (504) is installed on the right side of the threaded sleeve (503). A pressure rod (505) is fixed on the right side of the adapter plate (504). The bottom of the pressure rod (505) extends into the air storage cylinder (4) and is fixed to the piston plate (506). The piston plate (506) is slidably connected to the inner wall of the air storage cylinder (4). The top of the air pumping pipe (507) is connected to the air storage cylinder (4). The bottom of the air pumping pipe (507) extends into the main body pipe (1) and is connected to the elastic expansion airbag (508). A buzzer alarm (3) is installed on the top of the chassis (2). A microcontroller (7), a power module (8), and a relay (9) are installed inside the chassis (2). The buzzer alarm (3), the flow sensor (6), and the relay (9) are all electrically connected to the microcontroller (7). The micro motor (501) is electrically connected to the relay (9).

2. The gas overcurrent safety valve according to claim 1, characterized in that: The outer ring of the piston disc (506) is fixed with an O-ring (5061), and the O-ring (5061) is tightly fitted to the inner wall of the gas storage cylinder (4).

3. The gas overcurrent safety valve according to claim 1, characterized in that: Flanges (101) are fixed at the left and right ends of the main tube (1).

4. The gas overcurrent safety valve according to claim 1, characterized in that: The elastic inflatable airbag (508) is made of nitrile rubber.

5. The gas overcurrent safety valve according to claim 1, characterized in that: The top of the chassis (2) is detachably connected to an inspection cover (201), and the side of the chassis (2) is provided with a manual operation window (202).

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