A bottom hoisting type methanol fuel tank structure of a box type methanol generator unit

Abstract

The utility model discloses a kind of box type methanol generator unit bottom hoisting type methanol fuel tank structure, including oil tank shell, mounting seat and C-type beam, the middle of mounting seat is provided with mounting groove, the inner bottom of mounting groove is fixed with buffer pad, and oil tank shell is connected in buffer pad middle;Compared with the traditional box type methanol generator unit bottom hoisting type methanol fuel tank structure of the utility model, box type methanol generator unit bottom hoisting type methanol fuel tank structure, through mounting seat, C-type beam, hoisting belt, connecting ring, first bolt and limit seat cooperation, the adaptability of oil tank shell hoisting and the convenience of maintenance have been improved, the stability of oil tank shell bottom end support is improved through mounting groove and buffer pad cooperation, limit through cover plate and C-type beam cooperation support, to limit the vertical displacement of oil tank shell, to reduce the vibration of connecting place, the stability of oil tank shell hoisting and service life have been improved.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a bottom-mounted methanol fuel tank structure for a box-type methanol generator set. Background Technology

[0002] A box-type methanol generator set is an integrated power equipment that uses methanol as fuel. Through a box-type structure, it integrates the generator set, fuel supply system, control system, and auxiliary components. Its core function is to convert the chemical energy of methanol into mechanical energy through combustion, and then into electrical energy through a generator, providing stable power output for various scenarios. Box-type methanol generator sets are widely used in emergency power supply, field operations, and other fields. The bottom-mounted methanol fuel tank of the box-type methanol generator set is a special container installed at the bottom of the box-type methanol generator set and fixed by hoisting. It is used to store and supply methanol fuel and is a key component to ensure the continuous operation of the generator.

[0003] Currently, containerized or silent box-type generator sets widely used in field operations and emergency power supply mainly use fossil fuels or natural gas as energy sources. These traditional fuels have low corrosiveness in chemical properties, so carbon steel is generally used in the design of the fuel tank structure. In existing technology, the fuel tank is directly fixed to the support frame composed of C-shaped steel and angle steel through welding or bolt connection to ensure equipment stability. Traditional fuels are gradually being replaced by clean energy such as methanol. Although methanol fuel has the advantages of low carbon and environmental protection, methanol has certain corrosive characteristics, which causes electrochemical corrosion and rust to occur when traditional carbon steel fuel tanks come into contact with methanol. Specifically, penetrating rust appears within three months, which seriously affects the service life of the equipment. This results in insufficient adaptability of the existing installation structure, and the vibration at the connection of the installation structure is prominent when the engine starts, which seriously affects the service life of the installation structure and the stability of the fuel tank installation. Utility Model Content

[0004] In order to overcome the problem that the existing box-type generator set bottom-mounted fuel tank structure is susceptible to corrosion and vibration during use, and that long-term vibration can affect the service life of the installation structure and the stability of the fuel tank installation.

[0005] The technical solution of this utility model is as follows: a bottom-mounted methanol fuel tank structure for a box-type methanol generator set, including a fuel tank shell, a mounting base and a C-shaped beam. The mounting base has a mounting groove in the middle, and a buffer pad is fixed to the bottom of the mounting groove. The fuel tank shell is snapped into the middle of the buffer pad. Several lifting straps are fixed to the side walls of the fuel tank shell near the two C-shaped beams. Each end of the lifting strap is fixed with a connecting ring. A first bolt is threaded to the middle of each connecting ring. Several limiting seats are threaded to the inner side walls of the C-shaped beams. A cover plate is installed on the top of the fuel tank shell.

[0006] Furthermore, the lifting slings are all linearly symmetrically distributed, and each lifting sling has a first threaded hole in the middle. The connecting rings are threaded into the middle of the first threaded holes, which improves the stability of the connecting ring installation.

[0007] Furthermore, the C-shaped beam has a second threaded hole on the side wall near the first threaded hole, and the end of the first bolt has a third threaded hole. The limiting seat is threadedly connected between the second threaded hole and the third threaded hole in sequence, which improves the stability of the hoisting belt connection.

[0008] Furthermore, the mounting base, lifting strap, and connecting ring are fixedly connected to form an integrated structure. The external dimensions of the buffer pad are adapted to the internal dimensions of the mounting groove. The buffer pad is fitted onto the bottom of the fuel tank shell, which improves the stability of the bottom support of the fuel tank shell.

[0009] Furthermore, each of the four corners at the top of the cover plate is threaded with a third bolt, which is then threaded onto the top of the two mounting bases.

[0010] Furthermore, a sealing ring is affixed to the surface of the fuel tank shell, and the top of the sealing ring is supported at the bottom of the cover plate.

[0011] Furthermore, an oil inlet pipe is inserted into the top of the oil tank shell, the oil inlet pipe is connected to the oil tank shell, and an end cap is threaded to the end of the oil inlet pipe.

[0012] Furthermore, a groove is provided on the surface of the cover plate near the oil inlet pipe, and the groove penetrates the side wall of the cover plate for the oil inlet pipe to be engaged.

[0013] The beneficial effects of this utility model are:

[0014] Compared to the traditional box-type methanol generator set bottom-mounted methanol fuel tank structure, this design improves the adaptability and maintenance convenience of the fuel tank shell through the cooperation of mounting base, C-beam, lifting strap, connecting ring, first bolt, and limit seat. The cooperation of mounting groove and buffer pad improves the stability of the bottom support of the fuel tank shell, and the cooperation of cover plate and C-beam supports and limits the vertical displacement of the fuel tank shell, thereby reducing vibration at the connection and improving the stability and service life of the fuel tank shell during lifting. Secondly, the design incorporates a sealing ring to isolate and buffer the fuel tank shell and cover plate, and a slot for the fuel inlet pipe to be engaged, thereby improving the stability of the top support of the fuel tank shell. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the bottom-mounted methanol fuel tank of the box-type methanol generator set of this utility model. Figure 1 ;

[0016] Figure 2 The diagram shown is a schematic representation of the overall exploded structure of this utility model.

[0017] Figure 3 The diagram shown is a schematic representation of the mounting base structure of this utility model.

[0018] Figure 4 The diagram shown is a schematic representation of the first bolt structure of this utility model;

[0019] Figure 5 The diagram shown is a schematic representation of the fuel tank shell structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Oil tank shell; 2. Mounting base; 3. C-beam; 4. Lifting strap; 5. Connecting ring; 6. First bolt; 7. Cover plate; 8. Oil inlet pipe; 9. Mounting groove; 10. Buffer pad; 11. Limiting seat; 12. First threaded hole; 13. Second threaded hole; 14. Third threaded hole; 15. Third bolt; 16. End cap; 17. Sealing ring; 18. Slot. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Among the currently discovered feasible technologies, the following are described:

[0023] The tank is the core carrier of fuel storage. The tank design needs to take into account corrosion resistance, structural strength and space adaptability. In terms of materials, the mainstream choice is 316L stainless steel or high-density polyethylene (HDPE) composite board. 316L stainless steel contains molybdenum, which has better chemical stability against methanol than ordinary stainless steel, making it especially suitable for outdoor environments with high humidity. HDPE board, on the other hand, can resist long-term light aging by adding anti-ultraviolet additives, and its weight is only 1 / 3 of that of a metal tank of the same volume, which greatly reduces the load pressure on the unit.

[0024] The shape design is based on the principle of "maximizing space utilization". Most of them are rectangular structures with rounded corners. The rounded corners can reduce stress concentration and prevent the tank from cracking due to vibration under full load. At the same time, it facilitates the internal fuel flow and reduces residue. The tank volume needs to match the generator's range requirements. It is usually designed according to the fuel consumption of the unit's rated power for 8-12 hours. For example, the fuel tank volume of a 50kW unit is mostly in the range of 300-500L.

[0025] The hoisting system is a key structure connecting the fuel tank to the bottom of the unit. It needs to bear the weight of the tank itself (approximately 150-300kg unloaded) plus the total weight of the fully loaded fuel (approximately 500-1000kg). The top four corners are equipped with integrated forged lifting lugs, which have a tensile strength of over 800MPa after heat treatment. The diameter of the lifting lug holes is matched with the specifications of the hoisting bolts, usually M20-M30. Anti-loosening washers and shock-absorbing rubber pads are added to the bolt connection parts to reduce the resonance transmission during unit operation.

[0026] The lifting beam is welded from H-beams or rectangular steel pipes, spans the top of the box and is rigidly connected to the lifting lugs. Both ends of the beam are fixed to the load-bearing beam at the bottom of the unit by U-shaped clamps. To accommodate different unit installation hole positions, the U-shaped clamps are designed with elongated holes and an adjustment range of ±50mm. After installation, they are tightened with high-strength bolts. The bolt preload must reach 800-1200 N·m to ensure that they do not loosen during long-term operation.

[0027] This system is responsible for fuel filling, supply and recovery. The pipeline materials are all made of methanol-resistant fluororubber or polytetrafluoroethylene (PTFE). The oil inlet is located at the top of the tank and is equipped with quick connectors and check valves. The connectors adopt the ISO18613 standard and are compatible with common methanol filling equipment. The check valve prevents backflow pressure caused by fuel backflow.

[0028] The oil outlet is located on one side of the bottom of the housing and is connected to the engine fuel supply line via a centrifugal filter (10μm filtration accuracy). The filter housing is made of transparent polycarbonate, making it easy to observe the accumulation of impurities, and the filter element can be quickly removed and replaced. An electromagnetic shut-off valve is connected in series on the fuel supply line. When the unit stops or a leak is detected, the valve cuts off the fuel supply within 0.5 seconds, blocking the fuel flow path.

[0029] In addition to the physical protection of the double-layer enclosure, the system integrates multiple active safety devices. The liquid level monitoring adopts a dual-redundancy design of magnetic float level gauge and ultrasonic sensor. The level gauge displays the real-time oil volume through the magnetic coupling principle, while the sensor converts the liquid level signal into a 4-20mA current signal and transmits it to the unit control cabinet. When the liquid level is below 10% or above 90%, an automatic warning is issued.

[0030] In terms of pressure control, a spring-loaded safety valve is installed on the top, with an opening pressure set at 0.15MPa. When the pressure inside the tank exceeds the limit due to temperature rise, the safety valve automatically releases pressure. The pressure relief port is connected to the exhaust gas treatment device to prevent methanol vapor from being directly emitted. A manual vent valve is also provided on the side of the tank to release air from the tank after refueling, ensuring smooth fuel supply.

[0031] Anti-static design is implemented throughout the entire structure. All metal components are connected by copper braided straps to form an equipotential body, which is ultimately connected to the unit's grounding system, with a grounding resistance ≤4Ω. The inner wall of the enclosure is coated with a conductive coating to prevent static electricity buildup and the generation of sparks.

[0032] Please refer to Figures 1-5A bottom-mounted methanol fuel tank structure for a box-type methanol generator set includes a fuel tank shell 1, a mounting base 2, and two C-shaped beams 3. The two C-shaped beams 3 are made of stainless steel and are symmetrically distributed for support and limitation. The C-shaped beams 3 can be welded to the bottom of the engine for support and limitation. A mounting groove 9 is provided in the middle of the mounting base 2. A buffer pad 10, made of rubber, is fixed to the bottom of the mounting groove 9 for cushioning and vibration reduction. The fuel tank shell 1 is snapped into the middle of the buffer pad 10. The external dimensions of the buffer pad 10 are adapted to the internal dimensions of the mounting groove 9. The buffer pad 10 is fitted onto the bottom of the fuel tank shell 1, improving the stability of the bottom support of the fuel tank shell 1. Several lifting straps 4 are fixed to the side wall of the fuel tank shell 1 near the two C-shaped beams 3. Each lifting strap 4 has a connecting ring 5 fixed to its end. The mounting base 2, lifting straps 4, and connecting rings 5 ​​are all made of stainless steel and are fixedly connected to form an integral structure for lifting. All four hoisting belts are linearly symmetrically distributed. Each hoisting belt 4 has a first threaded hole 12 in the middle. The connecting rings 5 ​​are threaded into the middle of the first threaded holes 12, which improves the stability of the installation of the connecting rings 5. Each connecting ring 5 has a first bolt 6 threaded into the middle. Several limit seats 11 are threaded into the inner side wall of the C-shaped beam 3. The top of the fuel tank shell 1 is equipped with a cover plate 7 to limit the vertical displacement of the fuel tank shell 1, thereby improving the convenience of the assembly of the fuel tank shell 1. Compared with traditional welding, it improves the convenience of replacing and maintaining the fuel tank shell 1. At the same time, the fuel tank shell 1 can be arranged in a new layout at the front of the generator set, and the size of the fuel tank shell 1 can be enlarged to 1800*1200*350 mm, realizing a multi-dimensional performance leap. Traditional fuel tanks, due to their arbitrary position or rear-mounted design, often cause the equipment to be "top-heavy", which is prone to shaking and imbalance in rugged terrain, and may even cause the risk of overturning. This design uses the fuel tank as a "front counterweight" to cleverly balance the overall center of gravity distribution of the machine. The C-beam 3, lifting belt 4, mounting base 2 and mounting groove 9 work together to reduce vibration in different arrays. The cover plate 7 provides support and limit, thereby improving the stability of the fuel tank shell 1 during hoisting.

[0033] The C-beam 3 has a second threaded hole 13 on its side wall near the first threaded hole 12, and the end of the first bolt 6 has a third threaded hole 14. The limiting seat 11 is threaded between the second threaded hole 13 and the third threaded hole 14 in sequence, which improves the stability of the hoisting belt 4 connection.

[0034] The top four corners of the cover plate 7 are each threaded with a third bolt 15. The third bolt 15 is threaded to the top of the two mounting seats 2 in sequence. A sealing ring 17 is pasted on the surface of the oil tank shell 1. The top of the sealing ring 17 is supported at the bottom of the cover plate 7. An oil inlet pipe 8 is inserted into the top of the oil tank shell 1. The oil inlet pipe 8 is connected to the oil tank shell 1. An end cap 16 is threaded to the end of the oil inlet pipe 8. A slot 18 is opened on the surface of the cover plate 7 near the oil inlet pipe 8. The slot 18 penetrates the side wall of the cover plate 7 for the oil inlet pipe 8 to be engaged.

[0035] When using the bottom-mounted methanol fuel tank structure of this box-type methanol generator set, the operator first moves the device to the designated position, then snaps the buffer pad 10 into the bottom of the mounting groove 9 to support the bottom of the fuel tank shell 1, then threads the first bolt 6 sequentially into the middle of the first threaded hole 12 to achieve the hoisting of the fuel tank shell 1, then attaches the sealing ring 17 to the surface of the fuel tank shell 1, and finally fixes the cover plate 7 to the top of the fuel tank shell 1 for support and limitation. The hoisting of the fuel tank shell 1 is achieved through the cooperation of the C-beam 3, the hoisting belt 4, and the mounting seat 2. The stability of the bottom support of the fuel tank shell 1 is improved by the cooperation of the mounting groove 9 and the buffer pad 10, and the stability of the top support of the fuel tank shell 1 is improved by the cooperation of the cover plate 7 and the sealing ring 17. The corrosion resistance can be improved by replacing the material with a new one, and the stability of the connection is improved by the cooperation of the connecting ring 5, the first bolt 6, and the limiting seat 11. This can reduce the damage to the connection by mechanical vibration, thereby improving the hoisting stability and service life of the fuel tank shell 1.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bottom-mounted methanol fuel tank structure for a box-type methanol generator set, characterized in that, It includes a fuel tank shell (1), a mounting base (2) and a C-shaped beam (3): the mounting base (2) has a mounting groove (9) in the middle, and a buffer pad (10) is fixed in the bottom of the mounting groove (9). The fuel tank shell (1) is snapped into the middle of the buffer pad (10). Several lifting straps (4) are fixed on the side wall of the fuel tank shell (1) near the two C-shaped beams (3). The ends of the lifting straps (4) are all fixed with connecting rings (5). The middle of the connecting rings (5) is threaded with a first bolt (6). Several limiting seats (11) are threaded on the inner side wall of the C-shaped beam (3). A cover plate (7) is installed on the top of the fuel tank shell (1).

2. The bottom-mounted methanol fuel tank structure of a box-type methanol generator set according to claim 1, characterized in that: The lifting slings (4) are all linearly symmetrically distributed. Each lifting sling (4) has a first threaded hole (12) in the middle. The connecting rings (5) are threadedly connected to the middle of the first threaded hole (12).

3. The bottom-mounted methanol fuel tank structure of a box-type methanol generator set according to claim 1, characterized in that: The C-beam (3) has a second threaded hole (13) on the side wall near the first threaded hole (12), and the end of the first bolt (6) has a third threaded hole (14). The limiting seat (11) is threadedly connected between the second threaded hole (13) and the third threaded hole (14) in sequence.

4. The bottom-mounted methanol fuel tank structure of a box-type methanol generator set according to claim 1, characterized in that: The mounting base (2), lifting strap (4) and connecting ring (5) are fixedly connected to form an integrated structure. The external dimensions of the buffer pad (10) are adapted to the internal dimensions of the mounting groove (9). The buffer pad (10) is fitted onto the bottom of the tank shell (1).

5. The bottom-mounted methanol fuel tank structure of a box-type methanol generator set according to claim 1, characterized in that: The top four corners of the cover plate (7) are each threaded with a third bolt (15), which is threaded onto the top of the two mounting seats (2) in sequence.

6. The bottom-mounted methanol fuel tank structure of a box-type methanol generator set according to claim 1, characterized in that: A sealing ring (17) is attached to the surface of the tank shell (1), and the top of the sealing ring (17) is supported at the bottom of the cover plate (7).

7. The bottom-mounted methanol fuel tank structure for a box-type methanol generator set according to claim 1, characterized in that: An oil inlet pipe (8) is inserted into the top of the oil tank shell (1). The oil inlet pipe (8) is connected to the oil tank shell (1). An end cap (16) is threaded to the end of the oil inlet pipe (8).

8. The bottom-mounted methanol fuel tank structure of a box-type methanol generator set according to claim 1, characterized in that: A slot (18) is provided on the surface of the cover plate (7) near the oil inlet pipe (8). The slot (18) passes through the side wall of the cover plate (7) for the oil inlet pipe (8) to be engaged.

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