A structure for rapid refueling of small fuel tanks

Abstract

This invention relates to the field of catering heating equipment technology, and discloses a structure for quickly refueling a small oil tank. The structure includes an oil dispenser and an oil outlet at the bottom of the dispenser. The oil outlet includes a fixed base and an oil outlet guide cylinder. An oil outlet channel is provided inside the oil outlet guide cylinder. The top of the fixed base is connected to the oil dispenser, and the bottom of the fixed base is connected to the oil outlet guide cylinder. A guide rod is provided inside the fixed base, and the guide rod slides in conjunction with the fixed base. This invention achieves rapid and accurate refueling and automatic spill prevention. By cooperating with the oil outlet of the oil dispenser and the oil tank cap structure, and simultaneously utilizing the oil pressure in the dispenser to balance with atmospheric pressure, oil dispensing is stopped, achieving rapid and accurate refueling and preventing leakage.

Description

Technical Field

[0001] This invention relates to the field of catering heating equipment technology, specifically a structure for quickly refueling a small fuel tank. Background Technology

[0002] In the catering industry, liquid-fired stoves are widely used for rapidly heating and cooking food. These stoves are favored by restaurants and fast-food outlets due to their small size, high thermal efficiency, and ease of operation. Liquid-fired stoves typically use liquid fuels such as alcohol-based liquid fuels as their energy source. Due to the size limitations of the stove body, the corresponding fuel tank volume is also small, requiring the fuel filler port to be designed compactly to fit the overall structural constraints.

[0003] Existing liquid fuel boilers present several inconveniences during refueling. Due to the small size of the refueling port, users often need to carefully control the tilting angle and speed of the refueling can to prevent fuel spillage. This not only increases operational complexity but also easily leads to fuel waste and environmental pollution. Furthermore, the slow refueling process may affect the efficient operation of catering businesses. Therefore, a solution is needed that can quickly, safely, and accurately refuel liquid fuel boiler tanks.

[0004] Therefore, it is necessary to provide a structure that enables rapid refueling of small fuel tanks to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a structure for rapid refueling of small fuel tanks, thereby improving refueling efficiency and reducing the risk of spillage.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a structure for quickly refueling a small fuel tank, comprising a fuel container and an oil outlet located at the bottom of the fuel container, the oil outlet comprising a fixed base and an oil outlet guide cylinder, the oil outlet guide cylinder having an oil outlet channel inside, the top end of the fixed base being connected to the fuel container, the bottom end of the fixed base being connected to the oil outlet guide cylinder, a guide rod being provided inside the fixed base, the guide rod being slidably engaged with the fixed base, a piston disc for closing the oil outlet channel being provided inside the fixed base, the guide rod passing through the piston disc, and the piston disc being fixedly connected to the guide rod, a first spring being sleeved on the guide rod.

[0007] A further feature of the present invention is that a sliding guide hole is provided inside the oil outlet guide cylinder, the bottom of the guide rod extends into the sliding guide hole, and the guide rod slides in conjunction with the sliding guide hole.

[0008] A further feature of the present invention is that it also includes a small oil tank, the top of which is provided with an oil tank cover, an oil inlet channel is provided inside the oil tank cover, a top post is provided inside the oil inlet channel, and a plug for sealing the oil inlet channel is provided at the top of the oil inlet channel.

[0009] A further feature of the present invention is that a filter screen is provided inside the small oil tank.

[0010] A further feature of the present invention is that a rubber pad is embedded in the bottom of the piston disc, and the rubber pad acts with the first spring to close or open the oil outlet channel from the oil can into the small oil tank.

[0011] A further feature of the present invention is that a sponge tube is fixedly installed at the bottom end of the oil outlet guide cylinder, the sponge tube is circular, an adjusting ring is embedded in the bottom wall of the sponge tube, an elastic damping connector is embedded inside the oil outlet guide cylinder, the bottom end of the elastic damping connector is connected to the adjusting ring, and a positioning block is fixedly installed on the inner wall of the oil inlet channel. When the oil outlet is connected to the small oil tank, the adjusting ring presses on the positioning block, thereby compressing the sponge tube.

[0012] A further configuration of the present invention is as follows: the elastic damping connector includes a damping guide rail, a slide block, a second spring, and a connecting rod. The damping guide rail is embedded inside the oil outlet guide cylinder, the slide block is slidably installed inside the damping guide rail, the top end of the connecting rod is fixedly connected to the slide block, the bottom end of the connecting rod is fixedly connected to the adjusting ring, the top end of the slide block is provided with a second spring, and the slide block is elastically connected to the top of the damping guide rail through the second spring.

[0013] A further feature of the present invention is that a guide rod is fixedly installed on the inner wall of the oil outlet channel, and when the sponge cylinder rebounds, one end of the guide rod contacts the sponge cylinder.

[0014] A further feature of the present invention is that the outer wall of the oil outlet guide cylinder is provided with a threaded groove. When the oil can is not in use, a cap is threadedly installed on the oil outlet guide cylinder. When the cap is tightened, the sponge cylinder is in a compressed state, which causes the oil in the sponge cylinder to be squeezed out and flow downward to the top of the piston disc to form an oil seal layer.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. Under normal conditions, the compression spring tightly seals the piston disc against the rubber gasket, blocking the oil outlet channel and ensuring that the oil in the refueling can does not leak or overflow. During the refueling process, the upper part of the refueling can is pressed down against the oil inlet channel of the fuel tank cap, while the fuel tank and the top column remain relatively stationary. Under external force, the top column pushes the guide rod upward, and the piston disc with the rubber gasket moves upward, opening the oil outlet channel of the refueling can. Air enters the refueling can, and the oil in the refueling can quickly flows into the fuel tank, achieving the rapid refueling function. When the oil in the fuel tank reaches the set liquid level, the lower end of the oil outlet guide column is immersed and sealed by the liquid surface. The oil level pressure in the refueling can reaches the atmospheric pressure, preventing air from entering the refueling can, and the oil dispensing stops, achieving the effect of accurate refueling.

[0017] 2. In the process of connecting the oil outlet to the small oil tank, as the adjusting ring contacts the positioning block, the adjusting ring moves upward relative to the oil outlet guide cylinder, thereby compressing the sponge cylinder and causing it to be in a contracted state. After the oil is refilled, as the oil outlet is pulled out, the sponge cylinder rebounds, and the oil remaining on the inner wall of the oil outlet channel flows to contact the sponge cylinder and is gradually absorbed by the sponge cylinder, thereby preventing the oil from dripping from the inner wall of the oil outlet channel after the oil can is refilled, improving the safety of refilling and improving the efficiency of refilling.

[0018] 3. The damping guide rail of the present invention makes the sliding of the slide block have a certain damping, thereby slowing down the downward movement and reset speed of the adjusting ring, so as to avoid the sponge tube being completely rebounded and fully absorbed by the oil before it is removed from the oil inlet channel, and to prevent the sponge tube from being unable to absorb the oil after the oil outlet is completely pulled out.

[0019] 4. By setting up the guide rod, the present invention enables the oil adhering to the inner wall of the oil outlet channel away from the sponge cylinder to flow to the sponge cylinder under the guidance of the guide rod. On the other hand, the guide rod can also serve as a guide for liquid flow, helping the liquid to flow more smoothly into the oil inlet channel. This guiding effect reduces the resistance in the liquid flow process, thereby enabling the liquid to be injected faster and accelerating the speed at which the oil flows into the oil inlet channel.

[0020] 5. When the cap is tightened, the sponge tube is compressed, causing the oil inside the sponge tube to be squeezed out and flow downwards to the top of the piston disc to form an oil seal layer, thereby improving the sealing performance of the piston disc and preventing the oil in the refill container from evaporating. The sponge tube not only prevents the oil from flowing out of the inner wall of the oil outlet channel after refilling, but also squeezes out the oil to form an oil seal layer to improve the sealing performance of the piston disc. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the oil can and oil outlet of the present invention;

[0022] Figure 2 This is a three-dimensional structural schematic diagram of the small fuel tank of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention during refueling;

[0024] Figure 4 This is a cross-sectional structural diagram of the small fuel tank of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the oil dispenser of the present invention in the closed state of the oil outlet;

[0026] Figure 6 A schematic diagram of the structure of the oil dispenser of the present invention in the oiling state when the oil is being filled;

[0027] Figure 7 This is a schematic diagram of the structure when the oil outlet and the small oil tank are connected according to the second embodiment of the present invention;

[0028] Figure 8 For the present invention Figure 7 A magnified structural diagram at point A;

[0029] Figure 9 This is a schematic diagram of the structure of the oil outlet in the closed state according to the second embodiment of the present invention.

[0030] In the diagram: 1. Oil can; 2. Oil outlet; 21. Fixed base; 22. Piston disc; 23. Oil outlet guide cylinder; 2301. Threaded groove; 24. Sliding guide hole; 25. Guide rod; 26. First spring; 27. Rubber pad; 28. Oil outlet channel; 3. Small oil tank; 4. Filter screen; 6. Oil inlet channel; 7. Top column; 8. Plug cap; 9. Oil tank cap; 10. Sponge tube; 11. Damping guide rail; 12. Slide seat; 13. Second spring; 14. Connecting rod; 15. Adjusting ring; 16. Positioning block; 17. Drainage rod; 18. Sealing cap; 19. Oil seal layer. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] Example 1:

[0033] Please see Figures 1-6In this embodiment of the invention, a structure for rapid refueling of a small fuel tank includes a fuel container 1, a fuel outlet 2 located at the bottom of the fuel container 1, and a small fuel tank 3. The fuel outlet 2 includes a fixing base 21 and a fuel outlet guide cylinder 23. The fixing base 21 is a double-threaded fixing base 21. The fuel outlet guide cylinder 23 has a fuel outlet channel 28 inside. The top end of the fixing base 21 is threadedly connected to the fuel container 1, and the bottom end of the fixing base 21 is threadedly connected to the fuel outlet guide cylinder 23. A guide rod 25 is provided inside the fixing base 21, and the guide rod 25 slides with the fixing base 21. The fixing base 21 also has a mechanism for sealing the fuel outlet channel 28. The piston disc 22 is provided with a guide rod 25 passing through it, and the piston disc 22 is fixedly connected to the guide rod 25. A first spring 26 is sleeved on the guide rod 25. The top end of the first spring 26 is connected to the fixed seat 21, and the bottom end of the first spring 26 is connected to the piston disc 22. A rubber pad 27 is embedded in the bottom of the piston disc 22. The rubber pad 27 and the first spring 26 act to close or open the oil outlet channel 28 of the oil can 1 into the small oil tank 3. A sliding guide hole 24 is provided in the oil outlet guide cylinder 23. The bottom of the guide rod 25 extends into the sliding guide hole 24, and the guide rod 25 slides in cooperation with the sliding guide hole 24.

[0034] In this embodiment, preferably, the top of the small fuel tank 3 is provided with a fuel tank cover 9, the fuel tank cover 9 is provided with an oil inlet channel 6, the oil inlet channel 6 of the fuel tank cover 9 is provided with a top post 7, and the top of the oil inlet channel 6 is provided with a plug 8 for sealing the oil inlet channel 6, so that the small fuel tank 3 is sealed after refueling.

[0035] In this embodiment, preferably, the small oil tank 3 is provided with a filter screen 4 inside, and the filter screen 4 completely covers the bottom of the oil inlet channel 6, so that the oil injected into the small oil tank 3 can be filtered.

[0036] After the oil outlet 2 is connected to the small oil tank 3, the sliding guide hole 24 of the oil outlet 2 is aligned with the top post 7 in the oil inlet channel 6 of the oil tank cover 9. Under the action of external force, the guide rod 25 is pushed upward, the first spring 26 is compressed, and the piston disc 22, along with the rubber gasket 27, moves upward to open the oil outlet channel 28 of the oil can 1. Air enters the oil can 1, and the oil in the oil can 1 flows quickly into the small oil tank 3, achieving the effect of rapid refueling of the small oil tank 3. When the external force is stopped, the first spring 26 causes the piston disc 22 with the rubber gasket 27 to quickly return to its original position and press and seal, closing the oil outlet channel 28 of the oil outlet 2, thus preventing leakage and dripping. The dimensions of the oil inlet channel 6 and the top column 7 of the oil cylinder 23 and the oil tank cap 9 are designed to match the liquid level required for refueling. When the oil in the small oil tank 3 reaches the set liquid level, the lower end of the oil outlet guide cylinder 23 is sealed by being immersed in the liquid. The oil level pressure in the oil can 1 reaches equilibrium with the atmospheric pressure, preventing air from entering the oil can 1 and stopping the oil dispensing, thus achieving accurate refueling. This achieves the functions of fast and accurate refueling and automatic spill prevention. Through the matching of the oil outlet 2 of the oil can 1 and the structure of the oil tank cap 9, and by utilizing the balance between the oil level pressure in the oil can and the atmospheric pressure, the oil dispensing stops, achieving fast and accurate refueling and preventing leakage.

[0037] Under normal conditions, the preload of the first spring 26 presses the piston disc 22 and the rubber gasket 27 together to seal and close the oil outlet channel 28 of the refueling container 1, blocking the oil outlet channel 28. Under the refueling working condition, the sliding guide hole 24 in the oil outlet guide cylinder 23 is aligned with the top column 7 in the oil inlet channel 6 of the oil tank cap 9. Under the action of external force, the first spring 26 is compressed more, the top column 7 pushes the guide rod 25 upward, the piston disc 22 and the rubber gasket 27 move upward, opening the oil outlet channel 28, air enters the refueling container 1, and the oil in the refueling container 1 flows quickly into the small oil tank 3.

[0038] The oil outlet guide cylinder 23 is designed to match the oil inlet channel 6 and top column 7 of the oil tank cover 9 according to the liquid level required for refueling. After the set liquid level is reached in the small oil tank 3, the lower end of the oil outlet guide cylinder 23 is immersed and sealed by the liquid level. The oil pressure in the oil can 1 is balanced with the atmospheric pressure, and air cannot enter the oil can 1. The oil outlet stops, achieving the effect of accurate refueling.

[0039] Example 2:

[0040] After refueling is completed in fuel can 1, some oil will remain on the inner wall of the oil outlet channel 28 in the oil outlet guide cylinder 23. When moving fuel can 1, this oil may drip onto the table. Since oil is flammable, it poses a certain safety hazard. Therefore, after separating the oil outlet 2 of fuel can 1 from the oil inlet channel 6 of small fuel tank 3, it is necessary to wait for a period of time for the oil remaining on the inner wall of the oil outlet channel 28 to flow downwards and drip into the oil inlet channel 6 of small fuel tank 3. When it is necessary to continuously refuel multiple small fuel tanks 3, it takes a certain amount of time for the oil to flow out from the inner wall of the oil outlet channel 28, thereby reducing refueling efficiency. In order to solve this technical problem, this embodiment is set up.

[0041] Please see Figures 7-9 In this embodiment of the invention, a sponge tube 10 is fixedly installed at the bottom end of the oil outlet guide cylinder 23. The sponge tube 10 is circular, and an adjusting ring 15 is embedded in the bottom wall of the sponge tube 10. An elastic damping connector is embedded inside the oil outlet guide cylinder 23, and the bottom end of the elastic damping connector is connected to the adjusting ring 15. A positioning block 16 is fixedly installed on the inner wall of the oil inlet channel 6. When the oil outlet 2 is connected to the small oil tank 3, the adjusting ring 15 presses on the positioning block 16, compressing the sponge tube 10. The elastic damping connector includes a damping guide rail 11, a slide block 12, a second spring 13, and a connecting rod 14. The damping guide rail 11 is embedded inside the oil outlet guide cylinder 23, and the slide block 12 is slidably installed inside the damping guide rail 11. The top end of the connecting rod 14 is fixedly connected to the slide block 12, and the bottom end of the connecting rod 14 is fixedly connected to the adjusting ring 15. The top end of the slide block 12 is provided with a second spring 13, and the slide block 12 is connected to the adjusting ring 15. The second spring 13 is elastically connected to the top of the damping guide rail 11. The damping guide rail 11 provides a certain degree of damping to the sliding of the slide block 12, thereby slowing down the downward movement and reset speed of the adjusting ring 15. This prevents the sponge cylinder 10 from fully rebounding and absorbing oil before it has been removed from the oil inlet channel 6. This also prevents the sponge cylinder 10 from being unable to continue absorbing oil after the oil outlet 2 is completely pulled out. During the process of connecting the oil outlet 2 with the small oil tank 3, as the adjusting ring 15 contacts the positioning block 16, the adjusting ring 15 moves upward relative to the oil outlet guide cylinder 23, thereby compressing the sponge cylinder 10 and causing it to be in a contracted state. After the refueling is completed, as the oil outlet 2 is pulled out, the sponge cylinder 10 rebounds, and the oil remaining on the inner wall of the oil outlet channel 28 flows to contact the sponge cylinder 10 and is gradually absorbed by it. This prevents the oil from dripping from the inner wall of the oil outlet channel 28 after the refueling can 1 is finished, improving the safety and efficiency of refueling.

[0042] In this embodiment, preferably, a guide rod 17 is fixedly installed on the inner wall of the oil outlet channel 28. When the sponge cylinder 10 rebounds, one end of the guide rod 17 contacts the sponge cylinder 10. By setting the guide rod 17, on the one hand, the oil adhering to the inner wall of the oil outlet channel 28 away from the sponge cylinder 10 can flow to the sponge cylinder 10 under the guidance of the guide rod 17. On the other hand, the guide rod 17 can act as a guide for liquid flow, helping the liquid to flow more smoothly into the oil inlet channel 6. This guiding effect reduces the resistance in the liquid flow process, so that the liquid can be injected faster, and the speed of oil flowing into the oil inlet channel 6 is accelerated. Multiple guide rods 17 can be set so that when the oil outlet 2 is pulled out, the oil at each position on the inner wall of the oil outlet channel 28 can flow to the sponge cylinder 10.

[0043] In this embodiment, preferably, the outer wall of the oil outlet guide cylinder 23 is provided with a threaded groove 2301. When the oil can 1 is not in use, a cap 18 is threadedly installed on the oil outlet guide cylinder 23. When the cap 18 is tightened, the sponge cylinder 10 is in a compressed state, which causes the oil in the sponge cylinder 10 to be squeezed out and flow downward to the top of the piston disc 22 to form an oil seal layer 19, thereby improving the sealing performance of the piston disc 22 and preventing the oil in the oil can 1 from evaporating. The setting of the sponge cylinder 10 can not only prevent the oil from flowing out of the inner wall of the oil outlet channel 28 after the oiling is completed, but also squeeze out the oil to form an oil seal layer 19 to improve the sealing performance of the piston disc 22.

[0044] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A structure for rapid refueling of a small fuel tank, comprising a fuel container (1) and an oil outlet (2) disposed at the bottom of the fuel container (1), wherein the oil outlet (2) comprises a fixed base (21) and an oil outlet guide cylinder (23), wherein an oil outlet channel (28) is provided inside the oil outlet guide cylinder (23), the top end of the fixed base (21) is connected to the fuel container (1), and the bottom end of the fixed base (21) is connected to the oil outlet guide cylinder (23), characterized in that: The fixed seat (21) is provided with a guide rod (25) inside, the guide rod (25) is slidably engaged with the fixed seat (21), the fixed seat (21) is provided with a piston disc (22) for sealing the oil outlet channel (28) inside, the guide rod (25) passes through the piston disc (22), and the piston disc (22) is fixedly connected to the guide rod (25), and a first spring (26) is sleeved on the guide rod (25). A sponge tube (10) is fixedly installed at the bottom end of the oil outlet guide tube (23). The sponge tube (10) is set as a ring. An adjusting ring (15) is embedded in the bottom wall of the sponge tube (10). An elastic damping connector is embedded in the inside of the oil outlet guide tube (23). The bottom end of the elastic damping connector is connected to the adjusting ring (15). A positioning block (16) is fixedly installed on the inner wall of the oil inlet channel (6). When the oil outlet (2) is connected to the small oil tank (3), the adjusting ring (15) presses on the positioning block (16) and compresses the sponge tube (10).

2. The structure for rapid refueling of a small fuel tank according to claim 1, characterized in that: The oil outlet guide cylinder (23) is provided with a sliding guide hole (24), the bottom of the guide rod (25) extends into the sliding guide hole (24), and the guide rod (25) slides in cooperation with the sliding guide hole (24).

3. The structure for rapid refueling of a small fuel tank according to claim 2, characterized in that: It also includes a small oil tank (3), the top of which is provided with an oil tank cover (9), an oil inlet channel (6) is provided inside the oil tank cover (9), a top column (7) is provided inside the oil inlet channel (6) of the oil tank cover (9), and a plug (8) for sealing the oil inlet channel (6) is provided at the top of the oil inlet channel (6).

4. The structure for rapid refueling of a small fuel tank according to claim 3, characterized in that: The small oil tank (3) is equipped with a filter screen (4).

5. The structure for rapid refueling of a small fuel tank according to claim 1, characterized in that: A rubber pad (27) is embedded in the bottom of the piston disc (22). The rubber pad (27) works with the first spring (26) to close or open the oil outlet channel (28) from the oil can (1) into the small oil tank (3).

6. The structure for rapid refueling of a small fuel tank according to claim 1, characterized in that: The elastic damping connector includes a damping guide rail (11), a slide (12), a second spring (13), and a connecting rod (14). The damping guide rail (11) is embedded inside the oil outlet guide cylinder (23). The slide (12) is slidably installed inside the damping guide rail (11). The top end of the connecting rod (14) is fixedly connected to the slide (12), and the bottom end of the connecting rod (14) is fixedly connected to the adjusting ring (15). The top end of the slide (12) is provided with a second spring (13), and the slide (12) is elastically connected to the top of the damping guide rail (11) through the second spring (13).

7. The structure for rapid refueling of a small fuel tank according to claim 6, characterized in that: A guide rod (17) is fixedly installed on the inner wall of the oil outlet channel (28). When the sponge cylinder (10) rebounds, one end of the guide rod (17) contacts the sponge cylinder (10).

8. The structure for rapid refueling of a small fuel tank according to claim 6, characterized in that: The outer wall of the oil outlet guide cylinder (23) is provided with a threaded groove (2301). When the oil can (1) is not in use, a cap (18) is threaded on the oil outlet guide cylinder (23). When the cap (18) is tightened, the sponge cylinder (10) is in a compressed state, which causes the oil in the sponge cylinder (10) to be squeezed out and flow downward to the top of the piston disc (22) to form an oil seal layer (19).

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