Gas tank container loading and unloading port leakage prevention structure

Abstract

The utility model discloses a kind of gas tank container loading and unloading port leak-proof structure, it is related to tank body leak-proof technical field, including tank body and the main frame for fixing tank body, the upper of tank body is provided with manhole, manhole is provided with manhole overflow box, the upper of tank body is close to the side of manhole and is provided with safety valve assembly, safety valve assembly is covered with safety valve overflow box;Two groups of gas phase holes and two groups of liquid phase holes are provided on manhole, two groups of gas phase holes and two groups of liquid phase holes are respectively mounted with valve assembly for controlling material loading and unloading, valve assembly includes check valve and ball valve fixed in series by flange, check valve is located above ball valve, the side surface of check valve is connected with air cock, air cock is connected gas storage tank by gas pipe, pressure reducing valve is connected on gas pipe, for receiving compressed gas from gas storage tank. Ball valve is opened in pneumatic mode, greatly reduce the risk of safety accident, fully comply with the strict safety standards of dangerous goods transport.

Description

Technical Field

[0001] This utility model belongs to the field of tank leakage prevention technology, and specifically relates to a leakage prevention structure for the loading and unloading port of a gas tank container. Background Technology

[0002] Currently, most trifluoroacetyl chloride transport tanks used domestically and internationally are 20-foot standard international shipping containers, consisting of a frame and a cylindrical body welded to it. The filling and unloading ports for trifluoroacetyl chloride are centrally located on the manhole cover at the top of the tank container. Trifluoroacetyl chloride is a colorless gas with a pungent odor; it is non-toxic itself, but it decomposes into toxic and corrosive hydrogen chloride and hydrogen fluoride gases upon contact with water or water vapor.

[0003] However, considering the special nature of trifluoroacetyl chloride media, valve selection must take into account the prevention of media leakage during transportation and filling / unloading. Existing engineering cases mainly use single-function manual or pneumatic valves, which require replenishment from a dedicated gas supply point, which is very inconvenient. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a leak-proof structure for the loading and unloading port of a gas tank container, so as to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A leak-proof structure for the loading and unloading port of a gas tank container includes a tank body and a main frame for fixing the tank body. A manhole is provided on the top of the tank body, and a manhole overflow box is provided on the manhole. A safety valve assembly is provided on the side of the top of the tank body near the manhole, and a safety valve overflow box is provided on the safety valve assembly.

[0007] The manhole is provided with two sets of gas phase holes and two sets of liquid phase holes, which are arranged in a cross shape. Each of the two sets of gas phase holes and two sets of liquid phase holes is equipped with a valve assembly for controlling the loading and unloading of materials. The valve assembly includes a check valve and a ball valve fixed in series by a flange. The check valve is located above the ball valve. An air nozzle is connected to the side of the check valve. The air nozzle is detachably connected to an air storage tank through an air pipe. A pressure reducing valve is connected to the air pipe to receive compressed gas from the air storage tank and pneumatically open the ball valve.

[0008] Preferably, the valve assembly further includes a valve stem mounted above the check valve, which can be mechanically opened by pressing the valve stem to achieve manual opening;

[0009] The upper end of the valve stem is covered with a protective cap.

[0010] Preferably, the check valve includes a valve disc and a return spring for pushing the valve disc to the closed position. A pneumatic diaphragm is connected above the valve disc, and a valve stem is connected above the pneumatic diaphragm. When the valve stem is pressed, its end mechanically squeezes the valve disc downward.

[0011] Preferably, the ball valve includes a valve body, a ball disposed within the valve body, and a spring for pushing the ball to the closed position;

[0012] When the valve disc moves downward, the bottom end of the valve disc presses against the ball, causing the ball to move to the open position;

[0013] When compressed gas is introduced into the nozzle from the gas tank, the gas pressure overcomes the spring force and pushes the ball to the open position to achieve pneumatic operation.

[0014] Preferably, the lower end of the valve assembly installed on the liquid phase orifice is welded with a siphon pipe for material inlet and outlet.

[0015] Preferably, the gas storage tank is also equipped with a pressure gauge A for displaying the gas pressure inside the gas storage tank in real time.

[0016] Preferably, the outer wall of the gas storage tank is provided with a heat insulation layer.

[0017] Preferably, a nameplate is installed on the side of the main frame, a ladder is also installed on the main frame, and a walkway is provided on the top of the main frame.

[0018] Preferably, a thermometer is installed through the tank, and a label is provided on the outer side of the tank.

[0019] Preferably, the gas storage tank is fixed to the main frame by bolts.

[0020] In summary, the present invention has the following main advantages:

[0021] First, this utility model employs a double-sealing structure combining a check valve and a ball valve in series, with the two valves connected by flanges to form an integrated valve assembly. This design offers significant advantages over traditional single-valve structures: even if one valve fails to seal under extreme conditions, the other valve remains sealed, effectively preventing the leakage of hazardous gases or liquids. Simultaneously, the inclusion of manhole overflow boxes and safety valve overflow boxes provides additional safety assurance, enabling timely collection of accidentally leaked materials and preventing environmental pollution. Especially when storing and transporting toxic and hazardous gases, this double-sealing and overflow collection protection system significantly reduces the risk of safety accidents, protecting the lives of operators and the surrounding environment, and meeting the stringent safety standards for hazardous materials transportation.

[0022] Secondly, this utility model integrates both manual and pneumatic operation modes, achieving seamless switching between the two modes through ingenious structural design. In pneumatic operation, compressed gas from the air tank acts on the air pressure diaphragm via an air nozzle, enabling remote control and automatic holding. Operators do not need to apply continuous force, significantly reducing labor intensity and making it particularly suitable for long-term loading and unloading operations. In manual operation, the valve is opened directly by pressing the valve stem via mechanical transmission. Even in cases of air source failure, insufficient air tank pressure, or emergencies, loading and unloading operations can still be carried out normally, ensuring system reliability. The protective cap design protects the manual operating mechanism from damage and prevents misoperation. This dual-mode design allows the entire system to possess both the convenience of automated operation and the reliability of manual operation, greatly improving the equipment's applicability and operational efficiency.

[0023] Third, this utility model features two sets of gas phase orifices and two sets of liquid phase orifices arranged in a cross shape within the manhole, with each orifice equipped with a complete valve assembly. This one-for-one backup design offers multiple advantages: First, when one set of valves requires maintenance or malfunctions, it can be immediately switched to the backup valve to continue operation, avoiding operational interruptions and economic losses due to equipment failure; second, during high-volume loading and unloading, both sets of valves can be opened simultaneously for parallel operation, significantly increasing loading and unloading efficiency; third, the siphon pipe welded to the lower end of the liquid phase valve can be configured with different lengths according to the characteristics of different materials, allowing for stratified material handling by selecting different valves. The pressure gauge A on the gas storage tank can monitor the gas source pressure in real time, and together with the insulation layer, ensures stable operation of the pneumatic system under various ambient temperatures, truly achieving continuous operation around the clock. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0026] Figure 3 This is a top view of the structure of this utility model;

[0027] Figure 4 This is a side view of the structure of this utility model;

[0028] Figure 5 This is a side view of the present invention. Figure 1 ;

[0029] Figure 6 This is a side view of the present invention. Figure 2 ;

[0030] Figure 7 This is a schematic diagram of the manhole structure of this utility model;

[0031] Figure 8 This is a schematic diagram of the valve assembly structure of this utility model;

[0032] Figure 9 This is a schematic diagram of the check valve and ball valve structure of this utility model;

[0033] Figure 10 This is a schematic diagram of the safety valve assembly structure of this utility model;

[0034] Figure 11 This is a schematic diagram of the thermometer structure of this utility model;

[0035] Figure 12 This is a schematic diagram of the pressure gauge A structure of this utility model;

[0036] Figure 13 This is the utility model Figure 3 Schematic diagram of the AA section structure;

[0037] Figure 14 This is a schematic diagram of the gas pipeline flow direction of this utility model.

[0038] Reference numerals: 1. Tank body; 2. Manhole; 3. Manhole overflow box; 4. Safety valve assembly; 5. Safety valve overflow box; 6. Insulation layer; 7. Main frame; 8. Nameplate; 9. Gas storage tank; 91. Pressure gauge A; 10. Ladder; 11. Thermometer; 12. Label; 13. Gas phase port; 14. Liquid phase port; 15. Walkway; 16. Valve assembly; 17. Check valve; 171. Valve disc; 172. Return spring; 173. Air pressure diaphragm; 18. Ball valve; 181. Valve body; 182. Ball; 183. Spring; 19. Air nozzle; 20. Air pipe; 21. Pressure reducing valve; 22. Valve stem; 23. Protective cap; 24. Siphon tube. Detailed Implementation

[0039] Example

[0040] refer to Figures 1 to 14 This embodiment of a gas tank container loading and unloading port leak-proof structure includes a tank body 1 and a main frame 7 for fixing the tank body 1. The main frame 7 is welded from high-strength steel and is used to fix and support the tank body 1. The tank body 1 is a horizontal cylindrical structure made of stainless steel or carbon steel. A manhole 2 is opened on the top of the tank body 1, and a manhole overflow box 3 is installed on the manhole 2. The overflow box 3 can collect any leaked material that may be generated around the manhole 2 to prevent material from overflowing and causing environmental pollution. A safety valve assembly 4 is installed on the side of the top of the tank body 1 near the manhole 2. The safety valve assembly 4 is covered with a safety valve overflow box 5. When the pressure inside the tank body 1 exceeds a set value, the safety valve assembly 4 will automatically open to release pressure and ensure the safety of the tank.

[0041] The manhole 2 is provided with two sets of gas phase holes 13 and two sets of liquid phase holes 14, which are arranged in a cross shape. One of the two sets of gas phase holes 13 and two sets of liquid phase holes 14 is reserved. Each of the two sets of gas phase holes 13 and two sets of liquid phase holes 14 is equipped with a valve assembly 16 for controlling the loading and unloading of materials. The valve assembly 16 includes a check valve 17 and a ball valve 18 fixed in series by a flange. The check valve 17 is located above the ball valve 18. The side of the check valve 17 is connected to a gas nozzle 19. The gas nozzle 19 is detachably connected to a gas storage tank 9 through a gas pipe 20. A pressure reducing valve 21 is connected to the gas pipe 20. The gas pipe 20 is made of pressure-resistant hose or metal pipe and can withstand high gas pressure. It is used to receive compressed gas from the gas storage tank 9 to pneumatically open the ball valve 18.

[0042] Valve assembly 16 also includes a valve stem 22 mounted above check valve 17. By pressing valve stem 22, check valve 17 and ball valve 18 can be mechanically opened to achieve manual opening, providing a backup opening method in case of pneumatic system failure. Valve stem 22 is made of stainless steel and has good corrosion resistance.

[0043] The upper end of the valve stem 22 is covered with a protective cap 23. The protective cap 23 is made of metal, which can protect the valve stem 22 from external damage and prevent misoperation.

[0044] The check valve 17 includes a valve disc 171 and a return spring 172 for pushing the valve disc 171 to the closed position. The return spring 172 is mounted below the valve disc 171 and always pushes the valve disc 171 to the closed position, ensuring that the valve is closed when there is no operation. A pneumatic diaphragm 173 is connected above the valve disc 171, and a valve stem 22 is connected above the pneumatic diaphragm 173. When the valve stem 22 is pressed, its end mechanically squeezes the valve disc 171 downward.

[0045] The ball valve 18 includes a valve body 181, a ball 182 disposed within the valve body 181, and a spring 183 for pushing the ball 182 to the closed position;

[0046] When valve disc 171 moves downward, the bottom end of valve disc 171 presses against ball 182, causing ball 182 to move to the open position;

[0047] Manual operation mode

[0048] For manual operation, the operator first needs to unscrew the protective nut 23 on the top of the valve to expose the internal valve stem 22. Using the valve's matching pressure tool, the operator places it on the valve stem 22 and applies downward pressure. Under pressure, the valve stem 22 moves downward, its end mechanically pushing the valve disc 171 inside the check valve 17 downward against the force of the return spring 172. The valve disc 171 continues downward, its bottom end contacting and pushing the ball 182 inside the ball valve 18, causing the ball 182 to move downward against the force of the spring 183 to the open position. At this point, the entire valve passage is fully open, allowing material to freely enter or be forced out of the tank 1. Throughout the loading and unloading process, the operator needs to maintain continuous pressure to ensure the valve remains open. After the material loading and unloading is completed, the operator releases the pressure head tool. The valve stem 22, now free of external force, automatically returns to its original position under the action of the return spring 172. Simultaneously, the ball 182 inside the ball valve 18 also returns to the closed position under the action of the spring 183, completely closing the valve passage and effectively preventing material leakage. Finally, the operator needs to retighten the protective nut 23 to prevent the valve stem 22 from accidental impact or misoperation.

[0049] When compressed gas is introduced into the air nozzle 19 from the air tank 9, the gas pressure overcomes the elastic force of the spring 183 and pushes the ball 182 to the open position to achieve pneumatic operation.

[0050] Pneumatic operation mode

[0051] The pneumatic operation mode eliminates the need to unscrew the protective nut 23 on the top of the valve, making operation more convenient and efficient. At the start of operation, the operator first opens the pressure reducing valve 21 on the air tank 9 to reduce the high-pressure gas in the tank to a suitable working pressure. Then, the operator opens the air nozzle 19 on the valve assembly 16 to be operated, and compressed gas enters the pressure chamber of the check valve 17 through the air pipe 20. The gas pressure acts on the pressure diaphragm 173, pushing the valve disc 171 connected to the pressure diaphragm 173 downwards, overcoming the resistance of the return spring 172. As the valve disc 171 moves downwards, its bottom end pushes the ball 182 inside the ball valve 18, causing the ball 182 to overcome the elastic force of the spring 183 and move downwards to the open position. The entire valve passage then opens, enabling the loading and unloading of materials. Throughout the pneumatic operation, as long as the gas pressure supply is maintained, the valve will remain open, freeing the operator's hands for other operations. After the material loading and unloading is completed, the operator closes the pressure reducing valve 21 at the outlet of the gas storage tank 9 and the gas nozzle 19 on the valve to cut off the gas supply. After the gas pressure is lost, the return spring 172 in the check valve 17 pushes the valve disc 171 to reset, and at the same time, the spring 183 in the ball valve 18 pushes the ball 182 to reset to the closed position, and the valve passage is automatically closed. The entire operation process is safe and reliable, effectively preventing the risk of material leakage.

[0052] A siphon pipe 24 for material inlet and outlet is welded to the lower end of the valve assembly 16 installed on the liquid phase port 14. The siphon pipe 24 extends to near the bottom of the tank body 1, about 50-100mm from the bottom of the tank, to ensure that the liquid material in the tank can be fully extracted.

[0053] The gas storage tank 9 is also equipped with a pressure gauge A91, which is used to display the gas pressure inside the gas storage tank 9 in real time.

[0054] The outer wall of the gas storage tank 9 is provided with a heat insulation layer 6.

[0055] A nameplate 8 is installed on the side of the main frame 7, a ladder 10 is also installed on the main frame 7, and a walkway 15 is set on the top of the main frame 7.

[0056] A thermometer 11 is installed through the tank body 1, and a label 12 is provided on the outer side of the tank body 1.

[0057] The gas storage tank 9 is fixed to the main frame 7 by bolts.

[0058] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A leak-proof structure for the loading and unloading port of a gas tank container, comprising a tank body (1) and a main frame (7) for fixing the tank body (1), characterized in that: A manhole (2) is provided on the top of the tank (1), and a manhole overflow box (3) is provided on the manhole (2). A safety valve assembly (4) is provided on the side of the top of the tank (1) near the manhole (2), and a safety valve overflow box (5) is provided on the safety valve assembly (4). The manhole (2) is provided with two sets of gas phase holes (13) and two sets of liquid phase holes (14). The two sets of gas phase holes (13) and two sets of liquid phase holes (14) are arranged in a cross shape. The two sets of gas phase holes (13) and two sets of liquid phase holes (14) are respectively equipped with valve assemblies (16) for controlling the loading and unloading of materials. The valve assembly (16) includes a check valve (17) and a ball valve (18) fixed in series by a flange. The check valve (17) is located above the ball valve (18). The side of the check valve (17) is connected to a gas nozzle (19). The gas nozzle (19) is detachable and connected to a gas storage tank (9) through a gas pipe (20). A pressure reducing valve (21) is connected to the gas pipe (20) for receiving compressed gas from the gas storage tank (9) to pneumatically open the ball valve (18).

2. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: The valve assembly (16) also includes a valve stem (22) mounted above the check valve (17), which can mechanically open the check valve (17) and the ball valve (18) by pressing the valve stem (22) to achieve manual opening; The upper end of the valve stem (22) is covered with a protective cap (23).

3. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 2, characterized in that: The check valve (17) includes a valve disc (171) and a return spring (172) for pushing the valve disc (171) to the closed position. A pneumatic diaphragm (173) is connected above the valve disc (171), and a valve stem (22) is connected above the pneumatic diaphragm (173). When the valve stem (22) is pressed, its end mechanically squeezes the valve disc (171) downward.

4. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: The ball valve (18) includes a valve body (181), a ball (182) disposed in the valve body (181), and a spring (183) for pushing the ball (182) to the closed position. When the valve disc (171) moves down, the bottom end of the valve disc (171) presses against the ball (182), causing the ball (182) to move to the open position; When compressed gas is introduced into the gas nozzle (19) from the gas tank (9), the gas pressure overcomes the elastic force of the spring (183) and pushes the ball (182) to the open position to achieve pneumatic operation.

5. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: The lower end of the valve assembly (16) installed on the liquid phase hole (14) is welded with a siphon pipe (24) for material inlet and outlet.

6. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: The gas storage tank (9) is also equipped with a pressure gauge A (91) for displaying the gas pressure inside the gas storage tank (9) in real time.

7. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: The outer wall of the gas storage tank (9) is provided with a heat insulation layer (6).

8. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: A nameplate (8) is installed on the side of the main frame (7), a ladder (10) is also installed on the main frame (7), and a walkway (15) is provided on the top of the main frame (7).

9. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: A thermometer (11) is installed through the tank (1), and a label (12) is provided on the outer side of the tank (1).

10. The anti-leakage structure for the loading and unloading port of a gas tank container according to claim 1, characterized in that: The gas storage tank (9) is fixed to the main frame (7) by bolts.

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