A nitrogen filling device for oil drums

Abstract

The utility model discloses a kind of oil drum nitrogen filling device, including oil drum body, its surface is equipped with butt joint sealing module and main valve gate.Butt joint sealing module includes solenoid valve, injection pipe, butt joint, at least two locking mechanisms, limit bottom ring, first sealing ring and second sealing ring.Injection pipe is communicated with oil drum, and it is controlled on-off by solenoid valve, and locking mechanism is used for fixed butt joint.Injection pipe outer wall and inner wall are equipped with first annular groove and second annular groove respectively, second sealing ring is equipped in second annular groove, first annular groove is equipped with tightness control mechanism, and tightness control mechanism includes driving ring, push liquid plate, liquid baffle and liquid passage, by rotating driving ring, second sealing ring is tightened using push liquid plate to push solution, realize double seal.Oil drum surface is also equipped with two-way pressure relief valve and pressure gauge.The utility model is good in sealing, leakage prevention, explosion-proof and flat, applicable to oil drum nitrogen filling inertization protection.

Description

Technical Field

[0001] This utility model relates to the field of dangerous goods transportation technology, specifically to a nitrogen filling device for oil drums. Background Technology

[0002] In industries such as petroleum, chemical, and coatings, standard 200-liter metal drums are commonly used to store and transport flammable liquids. The upper space inside these drums can accumulate flammable and explosive mixtures of oil and gas. During transportation, storage, or subsequent handling, these mixtures are highly susceptible to combustion or explosion when exposed to static electricity, impact, or open flames, posing a significant safety hazard.

[0003] Currently, filling oil drums with nitrogen is an effective inerting protection method. However, existing nitrogen filling methods mostly use simple hoses and valves, which have the following significant drawbacks: First, the sealing is poor. The connection between the nitrogen filling pipe and the oil tank injection port is mostly a simple insertion type, which is not airtight and leads to a large amount of nitrogen leakage. This not only wastes gas, but also fails to effectively reduce the oxygen concentration inside the tank, greatly reducing the safety effect.

[0004] Secondly, during the nitrogen filling process, if misoperation or defects in the tank cause an abnormal increase in pressure inside the tank, there is a risk that the oil tank may burst.

[0005] Therefore, there is an urgent need for a dedicated nitrogen filling device. Utility Model Content

[0006] The purpose of this invention is to provide a nitrogen filling device for oil drums to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen filling device for an oil drum, comprising an oil drum body, wherein a docking sealing module and a main valve are respectively provided on the surface of the oil drum body, the docking sealing module comprising a solenoid valve, an injection pipe, a docking connector, at least two locking mechanisms, a limiting bottom ring, a first sealing ring and a second sealing ring, the injection pipe being fixedly connected to the upper surface of the oil drum body and communicating with the interior of the oil drum body, the solenoid valve being installed at the bottom of the injection pipe for controlling the opening and closing of the injection pipe, the docking connector being slidably connected to the inner wall of the injection pipe and being fixedly connected to an external gas supply pipeline, the locking mechanisms being symmetrically fixedly installed on both sides of the injection pipe for fixing the docking connector, the limiting bottom ring being fixedly connected to the inner wall of the injection pipe, the first sealing ring being fixedly connected to the upper surface of the limiting bottom ring and abutting against the lower end of the docking connector, the middle outer wall and the middle inner wall of the injection pipe being respectively provided with a first annular groove and a second annular groove, the second sealing ring being fixedly connected to the inner wall of the second annular groove, and a tension control mechanism for controlling the tightening and loosening of the second sealing ring being provided in the first annular groove.

[0008] Preferably, the tension control mechanism includes a drive ring, a pusher plate, a baffle plate, and a liquid passage hole. The drive ring is rotatably and sealed within the first ring groove. The pusher plate is fixedly connected to the inner wall of the drive ring. The baffle plate is fixedly connected to the inner wall of the first ring groove. Both the first and second ring grooves are filled with solution. The liquid passage hole is located between the first and second ring grooves and close to the baffle plate.

[0009] Preferably, a first magnetic plate is fixedly connected to the inner wall of the drive ring, and a second magnetic plate is fixedly connected to the inner wall of the first ring groove, and the first magnetic plate and the second magnetic plate can attract and fix each other.

[0010] Preferably, the solution is an antifreeze.

[0011] Preferably, the locking mechanism includes a housing, a movable disc, a pin, and a spring. The housing is fixedly connected to the outer surface of the injection tube, the movable disc is slidably connected to the inner wall of the housing, and the movable disc is fixedly connected to the outer surface of the pin. The pin extends through to the outer side of the housing, and the spring is sleeved on the outer surface of the pin. The outer surface of the connector has a hole corresponding to the end of the pin.

[0012] Preferably, the surface of the oil drum body is provided with a two-way pressure relief valve.

[0013] Preferably, the surface of the oil drum body is also provided with a pressure gauge for detecting the air pressure inside the drum.

[0014] Beneficial effects This utility model provides a nitrogen filling device for oil drums, which has the following beneficial effects: 1. This nitrogen filling device for oil drums, through the setting of a double sealing structure (a first sealing ring and a second sealing ring) and a tightness control mechanism, can achieve efficient sealing, prevent nitrogen leakage, and improve the inerting effect and safety.

[0015] 2. This nitrogen filling device for oil drums, by setting a locking mechanism and using a pin to insert into the socket, can quickly fix the connector, which is easy to operate and has a reliable connection.

[0016] 3. This oil drum nitrogen filling device, through the setting of a two-way pressure relief valve, realizes high pressure relief and negative pressure gas replenishment, and has the functions of both explosion-proof drum and anti-collapse drum. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a nitrogen filling device for an oil drum proposed in this utility model; Figure 2 This is a cross-sectional view of the sealing module of a nitrogen filling device for an oil drum proposed in this utility model. Figure 3This is a top-section structural diagram of the tension control mechanism of a nitrogen filling device for an oil drum proposed in this utility model; Figure 4 This utility model proposes a nitrogen filling device for oil drums. Figure 2 A schematic diagram of the enlarged structure of A.

[0018] In the diagram: 1. Oil drum body; 2. Solenoid valve; 3. Injection pipe; 4. Connector; 5. Locking mechanism; 6. Limiting bottom ring; 7. First sealing ring; 8. Second sealing ring; 9. First annular groove; 10. Second annular groove; 11. Tightening / loosening control mechanism; 12. Drive ring; 13. Push plate; 14. Baffle plate; 15. Liquid passage hole; 16. Solution; 17. First magnetic suction plate; 18. Second magnetic suction plate; 19. Housing; 20. Movable disc; 21. Pin rod; 22. Spring; 23. Insertion hole; 24. Two-way pressure relief valve; 25. Pressure gauge. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication 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 invention according to the specific circumstances.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a nitrogen filling device for an oil drum, comprising an oil drum body 1. A docking sealing module and a main valve are respectively provided on the surface of the oil drum body 1. The docking sealing module includes a solenoid valve 2, an injection pipe 3, a connector 4, at least two locking mechanisms 5, a limiting bottom ring 6, a first sealing ring 7, and a second sealing ring 8. The injection pipe 3 is fixedly connected to the upper surface of the oil drum body 1 and communicates with the interior of the oil drum body 1. The solenoid valve 2 is installed at the bottom of the injection pipe 3 to control the opening and closing of the injection pipe 3. The connector 4 is slidably connected to the injection pipe 3. The inner wall of the injection pipe 3 is fixedly connected to the external gas pipeline 4. The locking mechanism 5 is symmetrically fixedly installed on both sides of the injection pipe 3 to fix the connector 4. The limiting bottom ring 6 is fixedly connected to the inner wall of the injection pipe 3. The first sealing ring 7 is fixedly connected to the upper surface of the limiting bottom ring 6 and abuts against the lower end of the connector 4. The middle outer wall and the middle inner wall of the injection pipe 3 are respectively provided with a first annular groove 9 and a second annular groove 10. The second sealing ring 8 is fixedly connected to the inner wall of the second annular groove 10. The first annular groove 9 is provided with a tension control mechanism 11 to control the tightening and loosening of the second sealing ring 8.

[0024] The tension control mechanism 11 includes a drive ring 12, a liquid pusher plate 13, a liquid baffle plate 14, and a liquid passage hole 15. The drive ring 12 is rotatably and sealed within the first annular groove 9. The liquid pusher plate 13 is fixedly connected to the inner wall of the drive ring 12, and the liquid baffle plate 14 is fixedly connected to the inner wall of the first annular groove 9. Both the first annular groove 9 and the second annular groove 10 are filled with a solution 16, specifically antifreeze. This design can effectively prevent the solution 16 from freezing at low temperatures. The liquid passage hole 15 is located between the first annular groove 9 and the second annular groove 10 and is close to the liquid baffle plate 14. A first magnetic suction plate 17 is fixedly connected to the inner wall of the drive ring 12, and a second magnetic suction plate 18 is fixedly connected to the inner wall of the first annular groove 9. The first magnetic suction plate 17 and the second magnetic suction plate 18 can attract and fix each other.

[0025] By setting two locking mechanisms 5, the injection tube 3 and the connector 4 can be relatively fixed. By setting a limiting bottom ring 6 and a first sealing ring 7, the first sealing ring 7 can be used to press against the bottom of the connector 4 to achieve a preliminary seal. By setting a tension control mechanism 11, the drive ring 12 can be rotated within the first annular groove 9, which can drive the pusher plate 13 to rotate synchronously. This, together with the baffle plate 14, limits the solution 16, thereby squeezing the solution 16 in the first annular groove 9 from the liquid passage 15 into the second annular groove 10. The first magnetic plate 17 and the second magnetic plate 18 attract each other, which can fix the drive ring 12 and prevent it from rotating and the solution 16 from flowing back. The solution 16 entering the second ring groove 10 will increase the pressure in the second ring groove 10, thereby tightening the second sealing ring 8 and making it fit tightly against the butt joint 4, thus achieving a high-efficiency seal. The first sealing ring 7 and the second sealing ring 8 cooperate with each other to form a double sealing structure, ensuring that the nitrogen filling process of the gas pipeline is almost zero leakage, which not only ensures the inerting effect, but also saves nitrogen and prevents oil and gas from escaping.

[0026] The locking mechanism 5 includes a housing 19, a movable disc 20, a pin 21, and a spring 22. The housing 19 is fixedly connected to the outer surface of the injection tube 3. The movable disc 20 is slidably connected to the inner wall of the housing 19 and fixedly connected to the outer surface of the pin 21. The pin 21 extends through to the outside of the housing 19. The spring 22 is sleeved on the outer surface of the pin 21. The outer surface of the connector 4 has a insertion hole 23 corresponding to the end of the pin 21. By setting the locking mechanism 5, the spring 22 applies elastic force to the movable disc 20, which allows the pin 21 to be inserted into the insertion hole 23, thereby achieving relative fixation between the injection tube 3 and the connector 4.

[0027] When it is necessary to disassemble the connector 4, the pin 21 can be pulled outward. At this time, the spring 22 will be compressed, and the pin 21 will move away from the socket 23. At the same time, the drive ring 12 can be rotated in the opposite direction. Under the action of external force, the first magnetic plate 17 and the second magnetic plate 18 will separate from each other. At this time, a portion of the solution 16 in the second ring groove 10 will flow back from the liquid passage hole 15 to the first ring groove 9, thereby reducing the pressure in the second ring groove 10, thereby loosening the second sealing ring 8 to facilitate the disassembly of the connector 4.

[0028] The surface of the oil drum body 1 is equipped with a two-way pressure relief valve 24. This valve allows for proactive venting when abnormally high pressure occurs inside the drum. Additionally, after nitrogen filling, if negative pressure forms inside the drum due to cooling or other reasons, the valve 24 can automatically draw in a small amount of air to balance the internal and external pressures, preventing the drum from being crushed by atmospheric pressure. This function integrates the features of an "explosion-proof drum" and an "anti-collapse drum," effectively enhancing its practicality.

[0029] The surface of the oil drum body 1 is also equipped with a pressure gauge 25 for detecting the air pressure inside the drum. By setting the pressure gauge 25, it is easy to understand the air pressure inside the oil drum body 1.

[0030] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nitrogen filling device for an oil drum, comprising an oil drum body (1), characterized in that: The surface of the oil drum body (1) is respectively provided with a docking sealing module and a main valve. The docking sealing module includes a solenoid valve (2), an injection pipe (3), a coupling (4), at least two locking mechanisms (5), a limiting bottom ring (6), a first sealing ring (7), and a second sealing ring (8). The injection pipe (3) is fixedly connected to the upper surface of the oil drum body (1) and communicates with the inside of the oil drum body (1). The solenoid valve (2) is installed at the bottom of the injection pipe (3) to control the opening and closing of the injection pipe (3). The coupling (4) is slidably connected to the inner wall of the injection pipe (3) and is connected to the external gas supply. The pipeline is fixedly connected, and the locking mechanism (5) is symmetrically fixedly installed on both sides of the injection pipe (3) to fix the connector (4). The limiting bottom ring (6) is fixedly connected to the inner wall of the injection pipe (3). The first sealing ring (7) is fixedly connected to the upper surface of the limiting bottom ring (6) and abuts against the lower end of the connector (4). The middle outer wall and the middle inner wall of the injection pipe (3) are respectively provided with a first ring groove (9) and a second ring groove (10). The second sealing ring (8) is fixedly connected to the inner wall of the second ring groove (10). The first ring groove (9) is provided with a tightening control mechanism (11) to control the tightening and loosening of the second sealing ring (8).

2. The nitrogen filling device for an oil drum according to claim 1, characterized in that: The tension control mechanism (11) includes a drive ring (12), a liquid pusher plate (13), a liquid baffle plate (14), and a liquid passage hole (15). The drive ring (12) is sealed and rotatably connected in the first ring groove (9). The liquid pusher plate (13) is fixedly connected to the inner wall of the drive ring (12). The liquid baffle plate (14) is fixedly connected to the inner wall of the first ring groove (9). The first ring groove (9) and the second ring groove (10) are both filled with solution (16). The liquid passage hole (15) is located between the first ring groove (9) and the second ring groove (10) and close to the liquid baffle plate (14).

3. The nitrogen filling device for an oil drum according to claim 2, characterized in that: The inner wall of the drive ring (12) is fixedly connected to a first magnetic plate (17), and the inner wall of the first ring groove (9) is fixedly connected to a second magnetic plate (18). The first magnetic plate (17) and the second magnetic plate (18) can attract and fix each other.

4. The nitrogen filling device for an oil drum according to claim 2, characterized in that: The solution (16) is specifically an antifreeze.

5. The nitrogen filling device for an oil drum according to claim 1, characterized in that: The locking mechanism (5) includes a housing (19), a movable disc (20), a pin rod (21), and a spring (22). The housing (19) is fixedly connected to the outer surface of the injection tube (3). The movable disc (20) is slidably connected to the inner wall of the housing (19) and fixedly connected to the outer surface of the pin rod (21). The pin rod (21) extends through to the outside of the housing (19). The spring (22) is sleeved on the outer surface of the pin rod (21). The outer surface of the connector (4) is provided with a socket (23) corresponding to the end of the pin rod (21).

6. The nitrogen filling device for an oil drum according to claim 1, characterized in that: The surface of the oil drum body (1) is provided with a two-way pressure relief valve (24).

7. The nitrogen filling device for an oil drum according to claim 1, characterized in that: The surface of the oil drum body (1) is also provided with a pressure gauge (25) for detecting the air pressure inside the drum.

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