Fuel tank structure

Abstract

The utility model discloses a fuel tank structure relates to fuel tank technical field, wherein, fuel tank structure includes tank body, fluidization pipeline and check valve, the tank body is equipped with the storage cavity for storing fine powder, the fluidization pipeline with the storage cavity is linked together, is used for conveying compressed air to the storage cavity, the check valve is located in the fluidization pipeline, to make the compressed air only can flow from the fluidization pipeline to the storage cavity. The utility model provides technical scheme aims at solving the technical problem that fine powder countercurrent enters fluidization pipeline and causes the blockage.

Description

Technical Field

[0001] This utility model relates to the field of fuel tank technology, and in particular to a fuel tank structure. Background Technology

[0002] Fuel tanks are often used to store solid fine fuel powder. Compressed air is introduced into the fuel tank through fluidization pipes to keep the fine fuel powder in a fluidized state, thus giving it good flowability and facilitating subsequent precise feeding and combustion.

[0003] In actual operation, when the compressed air supply suddenly stops, the pressure inside the fluidizing pipe drops rapidly. At this time, the fuel tank is still filled with a large amount of loose fine powder, which will settle downwards under its own gravity. Simultaneously, the remaining compressed air in the fuel tank will escape outwards, forming a reverse airflow. Since the fluidizing pipe is directly connected to the fuel tank, the fine powder, under the combined effect of gravity and the reverse airflow, will flow back into the fluidizing pipe through the pipe opening, easily causing blockage.

[0004] To prevent fine powder from flowing back into the fluidizing pipe, existing technologies typically install a filter screen, such as a 500-mesh metal screen, at the connection between the fluidizing pipe and the fuel tank. This filter screen can allow compressed air to pass through while blocking most fine powder particles from entering the pipe.

[0005] However, when the diameter of the fine powder is much smaller than the filter screen pore size, these fine powders can pass through the filter screen and enter the fluidization pipe. Therefore, for even finer powders, the filter screen's isolation effect is limited and cannot fundamentally solve the problem of fine powder backflow and clogging. Utility Model Content

[0006] The main purpose of this invention is to propose a fuel tank structure that aims to solve the technical problem of blockage caused by fine powder flowing back into the fluidization pipe.

[0007] To achieve the above objectives, this utility model proposes a fuel tank structure, the fuel tank structure comprising: The tank body is provided with a cavity for storing fine powder; A fluidizing conduit, connected to the cavity, for supplying compressed air to the cavity; and A one-way valve is provided in the fluidizing pipe so that the compressed air can flow only from the fluidizing pipe to the cavity.

[0008] In one embodiment, the one-way valve includes: A valve body is disposed in the fluidization pipe and has a fluid passage that passes through the valve body, the fluid passage being used for the transmission of compressed air; A valve seat, wherein the valve seat is disposed within the fluid passage and forms a sealing port; and A valve core, which is movably disposed within the fluid channel and has an open state and a closed state; In the open state, a gap is provided between the valve core and the sealing port to facilitate the flow of fluid. In the closed state, the valve core abuts against the sealing port to block the fluid passage.

[0009] In one embodiment, the valve body forms a cylindrical fluid channel, and the valve core is a sphere, the radius of which is smaller than the radius of the fluid channel and larger than the radius of the sealing port.

[0010] In one embodiment, the sealing port is a conical opening, and the radius of the valve core is smaller than the radius of the sealing port on the side closer to the valve core, and larger than the radius of the sealing port on the side farther from the valve core.

[0011] In one embodiment, the one-way valve further includes a sealing ring disposed on the inner wall surface of the sealing port.

[0012] In one embodiment, the one-way valve further includes an elastic element, one side of which is connected to the side of the valve body away from the sealing port, and the other side of which is connected to the valve core.

[0013] In one embodiment, the bottom of the tank has multiple air inlets communicating with the cavity, and the fluidization pipe includes: A fluidizing gas pipe, wherein the fluidizing gas pipe is spaced apart from the tank body and is connected to a blowing device; and Multiple connecting tubes, each of which is connected to an air inlet and a fluidizing tube at both ends; The one-way valve includes multiple valves, each of which is located on a connecting air pipe.

[0014] In one embodiment, the fluidizing gas pipe is annular, and a plurality of the connecting gas pipes are arranged around the tank body.

[0015] In one embodiment, the bottom of the tank is provided with a discharge port that communicates with the cavity, and a plurality of air inlets are arranged around the discharge port.

[0016] In one embodiment, the tank includes a main body and a connecting part, the main body and the connecting part are connected by a flange, and the main body and the connecting part cooperate to form the cavity, and the fluidizing pipe is connected to the connecting part.

[0017] The technical solution of this utility model is to install a one-way valve on the fluidization pipeline that only allows compressed air to flow to the tank. When the compressed air is supplied normally, the valve opens and the air smoothly enters the tank to fluidize the fine powder. Once the compressed air is suddenly interrupted, the one-way valve immediately responds to the reverse pressure difference and closes quickly, thereby isolating the fluidization pipeline and fundamentally preventing fine powder of any particle size from flowing back into the pipeline and avoiding blockage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of an embodiment of the fuel tank structure provided by this utility model; Figure 2 This is a schematic diagram of a fuel tank structure with the check valve in the closed state. Figure 3 This is a schematic diagram of a fuel tank structure with the one-way valve in the open position.

[0020] Explanation of icon numbers: 100. Fuel tank structure; 1. Tank body; 11. Cavity; 12. Main body; 13. Connecting part; 14. Flange; 2. Fluidizing pipe; 21. Fluidizing gas pipe; 22. Connecting gas pipe; 3. One-way valve; 31. Valve body; 311. Fluid passage; 32. Valve seat; 321. Sealing port; 33. Valve core; 34. Elastic element.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] Fuel tanks are often used to store solid fine fuel powder. Compressed air is introduced into the fuel tank through fluidization pipes to keep the fine fuel powder in a fluidized state, thus giving it good flowability and facilitating subsequent precise feeding and combustion.

[0026] In actual operation, when the compressed air supply suddenly stops, the pressure inside the fluidizing pipe drops rapidly. At this time, the fuel tank is still filled with a large amount of loose fine powder, which will settle downwards under its own gravity. Simultaneously, the remaining compressed air in the fuel tank will escape outwards, forming a reverse airflow. Since the fluidizing pipe is directly connected to the fuel tank, the fine powder, under the combined effect of gravity and the reverse airflow, will flow back into the fluidizing pipe through the pipe opening, easily causing blockage.

[0027] To prevent fine powder from flowing back into the fluidizing pipe, existing technologies typically install a filter screen, such as a 500-mesh metal screen, at the connection between the fluidizing pipe and the fuel tank. This filter screen can allow compressed air to pass through while blocking most fine powder particles from entering the pipe.

[0028] However, when the diameter of the fine powder is much smaller than the filter screen pore size, these fine powders can pass through the filter screen and enter the fluidization pipe. Therefore, for even finer powders, the filter screen's isolation effect is limited and cannot fundamentally solve the problem of fine powder backflow and clogging.

[0029] This utility model proposes a fuel tank structure 100, which aims to solve the technical problem of blockage caused by fine powder flowing back into the fluidization pipe 2.

[0030] Please see Figures 1 to 3 In one embodiment of the present invention, the fuel tank structure 100 includes a tank body 1, a fluidizing pipe 2 and a one-way valve 3. The tank body 1 is provided with a cavity 11 for storing fine powder. The fluidizing pipe 2 is connected to the cavity 11 and is used to deliver compressed air to the cavity 11. The one-way valve 3 is provided on the fluidizing pipe 2 so that the compressed air can only flow from the fluidizing pipe 2 to the cavity 11.

[0031] Understandably, the tank 1 contains a sealed cavity 11 for temporarily storing solid fine fuel powder. The fluidizing pipe 2 is connected to both the air blowing equipment and the bottom wall of the cavity 11, for supplying compressed air. A one-way valve 3 is installed in the fluidizing pipe 2, allowing one-way flow between the fluidizing pipe 2 and the cavity 11. During normal operation, compressed air pushes open the one-way valve 3 and enters the cavity 11, fluidizing the fine fuel powder. When the air blowing equipment is shut down, the pressure in the fluidizing pipe 2 drops sharply, and the one-way valve 3 immediately closes under the reverse pressure difference within the cavity 11, isolating the fluidizing pipe 2 from the cavity 11. This prevents the fine fuel powder from flowing back into the fluidizing pipe 2 under gravity and reverse airflow, thus preventing blockage.

[0032] In one implementation, please refer to Figure 2 and Figure 3 The one-way valve 3 includes a valve body 31, a valve seat 32, and a valve core 33. The valve body 31 is located in the fluidizing pipe 2 and has a fluid passage 311 extending through it for the transmission of compressed air. The valve seat 32 is located within the fluid passage 311 and has a sealing port 321. The valve core 33 is movably located within the fluid passage 311 and has an open state and a closed state. In the open state, there is a gap between the valve core 33 and the sealing port 321 to allow the fluid passage 311 to be open; in the closed state, the valve core 33 abuts against the sealing port 321 to block the fluid passage 311.

[0033] In this embodiment, the valve body 31 serves as a pressure-bearing outer shell, and a fluid channel 311 is formed inside it for the transmission of compressed air. The valve seat 32 is disposed within the fluid channel 311 and is located on the side of the seat body closer to the fluidizing pipe 2. The valve core 33 achieves position switching through the pressure difference on both sides of the fluid channel 311.

[0034] Understandably, when compressed air is blown from the fluidizing pipe 2 into the cavity 11, the compressed air pushes the valve core 33 away from the sealing port 321, and the fluid passage 311 opens. When the compressed air stops blowing in, the valve core 33, under its own gravity, presses against the sealing port 321, and the passage is instantly cut off.

[0035] In one implementation, please refer to Figure 2 and Figure 3 The valve body 31 has a cylindrical fluid channel 311, and the valve core 33 is a sphere. The radius of the valve core 33 is smaller than the radius of the fluid channel 311 and larger than the radius of the sealing port 321.

[0036] In this embodiment, the fluid channel 311 is cylindrical and the valve core 33 is spherical, which makes the resistance of the valve core 33 when moving in the fluid channel 311 small, and facilitates quick switching between the two states.

[0037] Optionally, the inner diameter of the fluid passage 311 is 1 mm to 2 mm larger than the radius of the valve core 33, thereby ensuring smooth airflow and providing axial guidance for the valve core 33.

[0038] Optionally, the valve core 33 can be a stainless steel hollow ball, a ceramic hollow ball, etc.

[0039] Alternatively, the valve core 33 can also be a cube structure, and the fluid channel 311 can be a cuboid structure. In this case, the valve core 33 can also reciprocate within the fluid channel 311. Meanwhile, the size of the sealing port 321 is smaller than the cross-sectional size of the valve core 33, so that when the valve core 33 abuts against the sealing port 321, it can block the fluid channel 311.

[0040] In one implementation, please refer to Figure 2 and Figure 3 The sealing port 321 is a conical opening, and the radius of the valve core 33 is smaller than the radius of the sealing port 321 on the side closer to the valve core 33, and larger than the radius of the sealing port 321 on the side farther away from the valve core 33.

[0041] In this embodiment, the inner wall of the sealing port 321 is a tapered cone. The valve core 33 and the cone make annular line contact at the small end, which concentrates the contact stress and ensures a reliable seal. The large end of the cone is larger than the radius of the valve core 33, providing an annular guide zone for the valve core 33 when it is opened, reducing airflow separation and eddies, and reducing pressure loss.

[0042] Understandably, the conical surface and the ball have a self-centering characteristic, so even if the valve core 33 rotates slightly after multiple impacts, it can still ensure coaxial sealing and maintain long-term zero leakage.

[0043] Optionally, the cone angle of the cone surface is typically between 30° and 60°.

[0044] In one embodiment, the one-way valve 3 further includes a sealing ring disposed on the inner wall surface of the sealing port 321.

[0045] In this embodiment, a sealing ring is also provided on the inner wall surface of the sealing port 321. As an elastic element, the sealing ring can achieve a soft seal when it comes into contact with the valve core 33, filling the micro-unevenness between the valve core 33 and the sealing port 321, and reducing the dependence on the precision of metal processing.

[0046] Alternatively, the sealing ring can be a silicone rubber or polyurethane sealing ring.

[0047] In one implementation, please refer to Figure 2 and Figure 3 The one-way valve 3 also includes an elastic element 34, one side of which is connected to the side of the valve body 31 away from the sealing port 321, and the other side of which is connected to the valve core 33.

[0048] In this embodiment, the elastic element 34 is installed on the side of the valve body 31 near the cavity 11 and connected to the valve core 33 to provide a closing preload force, wherein the elastic element 34 is a spring.

[0049] Understandably, when the normal fluidizing gas pressure is greater than the pre-tightening force, the valve core 33 is pushed open. When the pressure in the fluidizing pipe 2 drops below the pre-tightening force, the spring can help push the valve core 33 to quickly contact the sealing port 321, so as to avoid the valve core 33 closing late due to low pressure difference, which would cause some fine powder to fall into the fluidizing pipe 2.

[0050] In one implementation, please refer to Figure 1 The tank body 1 has multiple air inlets at its bottom that connect to the cavity 11. The fluidizing pipe 2 includes a fluidizing gas pipe 21 and multiple connecting gas pipes 22. The fluidizing gas pipe 21 is spaced apart from the tank body 1 and is connected to the air blowing equipment. Each connecting gas pipe 22 is connected to an air inlet and a fluidizing gas pipe 21 at both ends. Multiple one-way valves 3 are also included, each one-way valve 3 being located on a connecting gas pipe 22.

[0051] In this embodiment, compressed air is simultaneously input into the cavity 11 through multiple air inlets, forming an integral fluidized bed and avoiding dead zones. Simultaneously, each connecting air pipe 22 is equipped with a one-way valve 3, ensuring that even if one valve fails, the remaining valves can still prevent backflow.

[0052] In one implementation, please refer to Figure 1 The fluidizing gas pipe 21 is annular, and multiple connecting gas pipes 22 are arranged around the tank body 1.

[0053] In this embodiment, the annular fluidizing tube 21 can provide a circumferential pressure equalization chamber, so that each connecting tube 22 receives the same air pressure from the fluidizing tube 21.

[0054] Optionally, the cross-section of the fluidizing gas tube 21 can be circular, and the diameter of the fluidizing gas tube 21 is 2 to 3 times the diameter of the connecting gas tube 22.

[0055] In one implementation, please refer to Figure 1 The bottom of the tank body 1 is also provided with a discharge port that connects to the cavity 11, and multiple air inlets are arranged around the discharge port.

[0056] Understandably, with multiple air inlets surrounding the discharge port, the discharge port continuously provides airflow during the discharge stage, which reduces the shear strength of fine powder near the discharge port, making it easier for the fine powder to be output from the discharge port.

[0057] In one implementation, please refer to Figure 1 The tank body 1 includes a main body 12 and a connecting part 13. The main body 12 and the connecting part 13 are connected by a flange 14, and the main body 12 and the connecting part 13 cooperate to form a cavity 11. The fluidizing pipe 2 is connected to the connecting part 13.

[0058] In this embodiment, the main body 12 and the connecting part 13 are connected by a flange 14 structure, so that the main body 12 can be lifted off as a whole for easy internal maintenance. At the same time, the connecting part 13 protrudes to the side away from the main body 12, and the discharge port is located at the bottom of the connecting part 13, so that the fine powder entering the connecting part 13 can converge to the discharge port for easy discharge.

[0059] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fuel tank structure, characterized in that, The fuel tank structure includes: The tank body is provided with a cavity for storing fine powder; A fluidizing conduit, connected to the cavity, for supplying compressed air to the cavity; and A one-way valve is provided in the fluidizing pipe so that the compressed air can flow only from the fluidizing pipe to the cavity.

2. The fuel tank structure as described in claim 1, characterized in that, The one-way valve includes: A valve body is disposed in the fluidization pipe and has a fluid passage that passes through the valve body, the fluid passage being used for the transmission of compressed air; A valve seat, wherein the valve seat is disposed within the fluid passage and forms a sealing port; and A valve core, which is movably disposed within the fluid channel and has an open state and a closed state; In the open state, a gap is provided between the valve core and the sealing port to facilitate the flow of fluid. In the closed state, the valve core abuts against the sealing port to block the fluid passage.

3. The fuel tank structure as described in claim 2, characterized in that, The valve body forms a cylindrical fluid channel, and the valve core is a sphere with a radius smaller than the radius of the fluid channel and larger than the radius of the sealing port.

4. The fuel tank structure as described in claim 3, characterized in that, The sealing port is a conical opening, and the radius of the valve core is smaller than the radius of the sealing port on the side closer to the valve core, and larger than the radius of the sealing port on the side farther away from the valve core.

5. The fuel tank structure as described in claim 3, characterized in that, The one-way valve also includes a sealing ring, which is disposed on the inner wall surface of the sealing port.

6. The fuel tank structure as described in claim 2, characterized in that, The one-way valve also includes an elastic element, one side of which is connected to the side of the valve body away from the sealing port, and the other side of which is connected to the valve core.

7. The fuel tank structure as described in any one of claims 1 to 6, characterized in that, The bottom of the tank has multiple air inlets communicating with the cavity, and the fluidization pipe includes: A fluidizing gas pipe, wherein the fluidizing gas pipe is spaced apart from the tank body and is connected to a blowing device; and Multiple connecting tubes, each of which is connected to an air inlet and a fluidizing tube at both ends; The one-way valve includes multiple valves, each of which is located on a connecting air pipe.

8. The fuel tank structure as described in claim 7, characterized in that, The fluidizing gas pipe is ring-shaped, and multiple connecting gas pipes are arranged around the tank body.

9. The fuel tank structure as described in claim 8, characterized in that, The bottom of the tank is also provided with a discharge port that communicates with the cavity, and multiple air inlets are arranged around the discharge port.

10. The fuel tank structure according to any one of claims 1 to 6, characterized in that, The tank includes a main body and a connecting part. The main body and the connecting part are connected by a flange, and the main body and the connecting part cooperate to form the cavity. The fluidizing pipe is connected to the connecting part.

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