A leaking stoppage tool set for liquefied petroleum gas cylinder and a using method thereof

Abstract

This invention discloses a liquefied petroleum gas (LPG) cylinder leak-sealing tool kit and its usage method. The tool kit includes a sparkless leak-sealing gun, a combustion venting gun, a steel wire discharge hose, a pressure gauge, a grounding post, a quick-connect interface, and a magnetic gas detector. The tool kit is made of brass, making it lightweight. The leak-sealing gun has an adjustable fixing width, and the maximum leak-sealing pressure is 1.0 MPa. This invention achieves rapid leak sealing, gas venting, or ignition discharge by reversing the principle of an LPG cylinder filling device, and can monitor the internal pressure of the cylinder and the surrounding gas concentration in real time. This tool kit has a simple structure, is easy to carry, and is safe and reliable. It effectively solves the leakage problem caused by damaged LPG cylinder valves, reduces the risk of explosion, and improves fire-fighting and rescue efficiency.

Description

[0001] A tool kit for plugging leaks in liquefied petroleum gas cylinders and its usage method Technical Field

[0002] This invention relates to the field of fire fighting and rescue equipment technology, specifically to a liquefied petroleum gas cylinder leak plugging tool set and its usage method. Background Technology

[0003] Liquefied petroleum gas (LPG) is a common fuel widely used in homes, restaurants, and industrial sectors. However, LPG cylinders are prone to leakage during use, storage, and transportation. When leaked gas mixes with air, it reaches its explosive limit and can easily ignite upon contact with a source of ignition, causing injury or property damage. Statistics show that from 2024 to the present, Nantong City alone has experienced 217 fires involving LPG cylinders, and this number is on the rise.

[0004] In existing technologies, firefighters typically cover the valve with a towel and then close it when dealing with liquefied petroleum gas (LPG) cylinder leaks. However, if the valve is damaged (e.g., deformed or stripped), this method becomes ineffective, and the only option is to dilute the gas with a water gun, which is inefficient, time-consuming, and pollutes the environment. Therefore, there is an urgent need for a specialized tool that can quickly and safely handle LPG cylinder leaks. Summary of the Invention

[0005] The purpose of this invention is to provide a tool kit for plugging leaks in liquefied petroleum gas cylinders, so as to solve the problems of low efficiency and poor safety in handling leaks in liquefied petroleum gas cylinders in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this invention is: a liquefied petroleum gas cylinder leak-sealing tool set, the innovation of which lies in comprising: Sparkless sealing gun, used to connect with leaking cylinder valves and achieve physical sealing; A combustion venting gun is used to connect to the sparkless plugging gun and ignite the emitted gas. Ignite the vent hose and the wire discharge hose to establish a gas delivery channel between the sparkless plugging gun and the combustion vent gun; An vent nozzle is used to connect to the sparkless plugging gun and to vent the gas. The pressure gauge is connected to the system via a 1-to-2 quick-connect interface for real-time monitoring of the pressure inside the gas cylinder. A grounding post, located at the discharge port, is used to discharge static electricity during operation. Quick interfaces are used to enable rapid connection and disconnection between components; Magnetic gas detectors are used to detect the concentration of combustible gases in the work environment in real time.

[0007] Furthermore, the sparkless leak-sealing gun includes a gun body, an adjustable clamping mechanism disposed at the front end of the gun body, a valve control system disposed inside the gun body, and an emergency shut-off valve disposed at the rear end of the gun body; the adjustable clamping mechanism includes at least two relatively movable jaws and a telescopic plug, and a push rod connected to one of the jaws, by pushing the push rod, driving the jaw to move axially, thereby causing the jaw to open and close linearly within the range of 10 mm to 40 mm; the valve control system includes a main airflow valve for controlling the on / off of gas from the clamping direction; the emergency shut-off valve is connected in series with the main airflow valve to form a double valve safety structure.

[0008] Furthermore, the body, adjustable locking mechanism, venting nozzle, quick connector, and grounding post of the sparkless plugging gun are all made of brass.

[0009] Furthermore, the end of the telescopic plug is provided with a gear adjustment knob, and the outer circumference of the knob is provided with anti-slip texture.

[0010] Furthermore, the steel wire discharge hose consists of an inner oil-resistant rubber hose and an outer steel wire braided wrapping layer.

[0011] Furthermore, the overall weight of the tool set is 1.25 ± 0.15 kg, and the rated sealing pressure of the sparkless sealing gun is not less than 1.0 MPa.

[0012] An innovative method for using a liquefied petroleum gas cylinder leak-sealing tool set includes the following steps: S1. Push the push rod to adjust the jaws of the sparkless plugging gun to a width suitable for the size of the leaking valve; S2. Quickly clamp the adjusted clamps onto the leakage valve to achieve a preliminary seal; S3. Connect the pressure gauge through the one-to-two quick interface and turn on the magnetic gas detector to monitor the internal pressure of the gas cylinder and the gas concentration in the surrounding environment in real time. S4. Depending on the site conditions, choose to safely vent the gas through the steel wire discharge hose, or connect the combustion venting gun to ignite and release the gas. S5. During the emission process, the grounding post ensures that the system is effectively grounded to prevent static electricity buildup.

[0013] The beneficial effects of this invention are: This invention features a simple structure, light weight, and portability, making it suitable for various scenarios (such as residential buildings, small businesses, and street-front shops). It employs a spark-free design, is anti-static, wear-resistant, and safe and reliable. It can monitor pressure and gas concentration in real time, reducing operational risks. This invention offers rapid leak sealing (within 3 seconds) and high efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the ignition emission mode of the present invention.

[0015] Figure 2 This is a schematic diagram of the safe venting mode of the present invention.

[0016] Explanation of reference numerals in the attached figures: 100 Sparkless Leak Sealing Gun; 101 Gun Body; 102a Clamping Grippers, 102b Telescopic Plug; 103 Emergency Shut-off Valve; 104 Push Rod; 105 Gear Adjustment Knob; 106 Main Airflow Valve; 200a Combustion Venting Gun; 200b Venting Nozzle; 300a Ignition Venting Hose; 300b Steel Wire Discharge Hose; 400 Pressure Gauge; 401 One-to-Two Quick-Connect Interface; 500 Grounding Post; 600 Quick-Connect Interface. Detailed Implementation

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0019] like Figure 1-2 As shown, the liquefied petroleum gas cylinder leak-sealing tool kit of the present invention is an integrated system, mainly comprising: a sparkless leak-sealing gun 100, a combustion venting gun 200a, a venting nozzle 200b, an ignition venting hose 300a, a steel wire discharge hose 300b, a pressure gauge 400 with a one-to-two quick-connect interface 401, a grounding post 500, a series of quick-connect interfaces 600, and a magnetic gas detector. All metal contact parts are made of brass to ensure sparkless characteristics.

[0020] Detailed description of core components: 1. The sparkless leak-sealing gun 100 is the core component of this case, and its specific structure is as follows: Gun body 101: A hollow brass casting, the interior of which forms the main airflow channel. Its front end is used to accommodate the adjustable locking mechanism, and its rear end has internal threads for connecting the emergency shut-off valve 103.

[0021] Adjustable clamping mechanism: This mechanism is responsible for clamping valves of steel cylinders of different sizes.

[0022] The clamp 102a has an L-shaped structure, and the front end of the telescopic plug 102b has a conical structure. The two open and close together to lock the leakage valve.

[0023] Push rod 104: is a refined brass rod. When push rod 105 is pushed, jaw 102a moves forward, and then push rod 105 is pulled, so that jaw 102a and jaw 102b open and close to lock the leakage valve.

[0024] Gear adjustment knob 105: Fixed to the end of the telescopic plug 102b of the push rod, its outer circumference is provided with dense anti-slip texture, which can facilitate precise adjustment by the operator even when wearing gloves; a gear slot is opened at the gun body 101 for gear adjustment knob adjustment. By pushing the knob 105 clockwise or counterclockwise, the grippers 102a and 102b can be driven to continuously and linearly open and close within the range of 10mm to 40mm.

[0025] Valve control system: Main airflow valve 106: Located on the airflow channel of the gun body 101, it is a manual ball valve or needle valve used to control the flow of gas from the direction of the chuck.

[0026] Emergency shut-off valve 103: This is a manually operated quick-closing valve, threadedly connected to the rear of the gun body 101. It is connected in series with the main airflow valve 106, together forming a "dual valve safety" structure.

[0027] 2. Incendiary venting gun 200a: The combustion venting gun 200a has its inlet connected to the ignition venting hose 300a via a quick-connect interface 600. A constant-light flame (not shown in the figure) is provided at its front end.

[0028] 3. The vent nozzle 200b is a brass spray gun, whose inlet is connected to the steel wire discharge hose 300b via quick connector 600 to vent the gas.

[0029] 4. Steel wire discharge hose 300a: This hose is used to connect the plugging gun 100 and the venting gun 200a. Its structure is a composite layer design: the inner layer is an oil-resistant rubber hose; the outer layer is a high-strength steel wire braided wrapping layer. Both ends of the hose are crimped with brass quick-connect fittings 600.

[0030] 5. Pressure monitoring and safety system: Pressure gauge 400: Connects to the system via a one-to-two quick-connect interface 401. One outlet of this interface 401 connects to the pressure gauge 400, and the other outlet connects to the subsequent hose or vent gun.

[0031] Grounding post 500: A brass rod with a tip, which is reliably connected to the metal part of the discharge port via a wire.

[0032] Magnetic gas detector: The bottom of the instrument housing is equipped with a strong magnet, which can be attracted to a metal carrier.

[0033] Detailed instructions for use: 1. Preparation and Adjustment: Connect the sparkless plugging gun 100, the steel wire discharge hose 300b, the pressure gauge 400, and the combustion venting gun 200a in sequence via the quick connector 600.

[0034] Push the gear adjustment knob 105 on the sparkless plugging gun 100 to make the openings of the jaws 102a and 102b suitable for the valve size.

[0035] 2. Quick leak sealing: Quickly insert the plugging gun clip into the leak valve and then quickly push the gear adjustment knob 105 in the opposite direction to tighten the jaws 102a and 102b, thus locking the leak valve.

[0036] System establishment and monitoring: Ensure that the main airflow valve 106 and the emergency shut-off valve 103 are in the closed position.

[0037] Turn on the magnetic gas detector to monitor the environmental concentration.

[0038] Connect the pressure gauge 400 via the 1-to-2 quick-connect interface 401 to read the real-time pressure inside the cylinder.

[0039] 3. Safety procedures: Scenario 1 (Direct Venting): Lead the outlet of the wire discharge hose 300b to a safe area, slowly open the main airflow valve 106, and perform controlled and safe venting through the vent nozzle 200b. During this process, ensure that the grounding post 500 is reliably grounded.

[0040] Scenario 2 (Ignition Venting): Connect the venting gun 200a. Point it to a safe, open area, ignite the flame, and then slowly open the main airflow valve 106 to draw out and burn the gas.

[0041] 4. Emergency Shutdown: In case of any unexpected situation during the handling process, the emergency shut-off valve 103 and the main airflow valve 106 can be closed immediately.

[0042] The following two typical application scenarios will illustrate the usage of this invention in detail. These embodiments are for illustrative purposes only and do not constitute a limitation on the scope of protection of this invention.

[0043] Example 1: Ignition Emission Mode This mode is suitable for situations where space is limited, ventilation is poor, or the cylinder pressure is high and leakage is large, where direct venting could lead to gas accumulation in low-lying areas, forming an explosive mixture. Its core principle is to convert flammable gases into much less hazardous carbon dioxide and water through controlled combustion.

[0044] The operation steps are as follows: System connection: such as Figure 2 As shown, the sparkless plugging gun 100, the ignition venting hose 300a, and the combustion venting gun 200a are connected sequentially via the quick connector 600. Ensure that each connection is reliably sealed.

[0045] Set up the ignition zone: Fix the muzzle of the combustion venting gun 200a towards an absolutely safe, open area (such as a deep pit or a designated torch ignition area), ensuring there are no obstructions or personnel in front of the muzzle. Connect and set up the grounding post 500.

[0046] Rapid Leak Sealing and Preparation: Use the sparkless leak sealing gun 100 to seal the leak. All operators should evacuate to a safe location, leaving only one operator on standby at the main airflow valve 107.

[0047] Remote ignition: Another firefighter, from a safe location, uses a long-handled igniter or other remote ignition method to ignite the constant flame of the 200a incendiary nozzle. Confirm that the flame is burning stably.

[0048] Initiating emission and combustion: After ignition confirmation, the operator at the main airflow valve 107 slowly opens the valve. Liquefied petroleum gas is delivered from the cylinder through a hose to the combustion venting gun 200a, where it is immediately ignited by the spark in front of it, forming a stable jet flame.

[0049] Process monitoring: Monitor the pressure drop inside the cylinder using a pressure gauge (400). The entire combustion process should remain stable until the flame is extinguished and the pressure returns to zero.

[0050] Completion and Handling: After confirming complete combustion, close the main airflow valve 107. Advantages include safety, thoroughness, and efficiency; it can eliminate explosion hazards quickly and with minimal air pollution. Disadvantages include a slightly complex operating procedure, the involvement of open flames, and extremely high requirements for on-site safety control.

[0051] Example 2: Safe Venting Mode This mode is suitable for situations where the site has good ventilation, is far from fire sources and residential areas, and the pressure of the leaking cylinder is low or the leakage is small. Its core principle is to directly release the gas inside the cylinder into the atmosphere for natural dilution.

[0052] The operation steps are as follows: System connection: such as Figure 1 As shown, the sparkless plugging gun 100 is connected to the wire discharge hose 300b via a quick connector 600. The outlet of the hose should face an open, safe area (such as an uninhabited open space, tunnel, etc.) and must be reliably connected to the grounding post 500 to conduct static electricity to the ground.

[0053] Quick Leak Sealing: Following the aforementioned method, use a sparkless leak sealing gun 100 to quickly clamp and seal the leaking valve.

[0054] Establish monitoring: Connect pressure gauge 400 to the system via quick-connect interface 401. Turn on the magnetic gas detector and place it upwind of the operating area to monitor the concentration of combustible gas in the environment.

[0055] Controlled venting: Slowly open the main airflow valve 107 on the sparkless plugging gun 100, and vent through the vent nozzle 200b. Closely observe the reading changes on the pressure gauge 400 and confirm that the ambient concentration is within a safe range using a gas detector. Control the venting flow rate by adjusting the opening of the main airflow valve 107 to ensure a smooth process.

[0056] Completion and Handling: After the pressure gauge at 400 indicates that the internal pressure of the cylinder has dropped to atmospheric pressure, close the main gas flow valve 107. After confirming that no gas is being released, disassemble the tool set. This method is gentle and has the advantages of being relatively simple to operate and requiring no open flame; however, it requires a longer time and has high requirements for the on-site environment (wind direction, space).

[0057] Through the comparative description of the two embodiments above, it is fully demonstrated that the toolkit of the present invention can provide commanders with a variety of reliable tactical options according to the rapidly changing actual situation on the ground, reflecting its high flexibility and practical value.

[0058] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A tool set for plugging leaks in liquefied petroleum gas cylinders, characterized in that, include: Sparkless sealing gun, used to connect with leaking cylinder valves and achieve physical sealing; A combustion venting gun is used to connect to the sparkless plugging gun and ignite the emitted gas. An vent nozzle is used to connect to the sparkless plugging gun and to vent the gas. Ignite the vent hose and the wire discharge hose to establish a gas delivery channel between the sparkless plugging gun and the combustion vent gun; The pressure gauge is connected to the system via a 1-to-2 quick-connect interface for real-time monitoring of the pressure inside the gas cylinder. A grounding post, located at the discharge port, is used to discharge static electricity during operation. Quick interfaces are used to enable rapid connection and disconnection between components; Magnetic gas detectors are used to detect the concentration of combustible gases in the work environment in real time.

2. The liquefied petroleum gas cylinder leak-sealing tool set according to claim 1, characterized in that, The sparkless leak-sealing gun includes a gun body, an adjustable clamping mechanism located at the front end of the gun body, a valve control system located inside the gun body, and an emergency shut-off valve located at the rear end of the gun body. The adjustable clamping mechanism includes at least two relatively movable jaws and a telescopic plug, as well as a push rod connected to one of the jaws. By pushing the push rod, the jaws are driven to move axially, thereby causing the jaws to open and close linearly within a range of 10 mm to 40 mm. The valve control system includes a main airflow valve for controlling the flow of gas from the clamping direction. The emergency shut-off valve is connected in series with the main airflow valve to form a double-valve safety structure.

3. The liquefied petroleum gas cylinder leak-sealing tool set according to claim 2, characterized in that, The sparkless plugging gun's body, adjustable locking mechanism, venting nozzle, quick connector, and grounding post are all made of brass.

4. The liquefied petroleum gas cylinder leak-sealing tool set according to claim 2, characterized in that, The telescopic plug has a gear adjustment knob at its end, and the knob has anti-slip texture on its outer circumference.

5. The liquefied petroleum gas cylinder leak-sealing tool set according to claim 1, characterized in that, The steel wire discharge hose consists of an inner oil-resistant rubber hose and an outer steel wire braided wrapping layer.

6. The liquefied petroleum gas cylinder leak-sealing tool set according to claim 5, characterized in that, The overall weight of the tool set is 1.25 ± 0.15 kg, and the rated sealing pressure of the sparkless sealing gun is not less than 1.0 MPa.

7. A method of using the liquefied petroleum gas cylinder plugging tool set as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Push the push rod to adjust the jaws of the sparkless plugging gun to a width suitable for the size of the leaking valve; S2. Quickly clamp the adjusted clamps onto the leakage valve to achieve a preliminary seal; S3. Connect the pressure gauge through the one-to-two quick interface and turn on the magnetic gas detector to monitor the internal pressure of the gas cylinder and the gas concentration in the surrounding environment in real time. S4. Depending on the site conditions, choose to safely vent the gas through the steel wire discharge hose, or connect the combustion venting gun to ignite and release the gas; S5. During the venting process, ensure that the system is effectively grounded through the grounding post to prevent static electricity buildup.

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