CN109973254B

CN109973254B - Flameless combustion methanol fuel supply device

Info

Publication number: CN109973254B
Application number: CN201910069248.6A
Authority: CN
Inventors: 周明强; 刘飞; 武洪松
Original assignee: China Hydrogen Energy Technology Co
Current assignee: China Hydrogen Energy Technology Co
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2020-06-05
Anticipated expiration: 2039-01-24
Also published as: CN109973254A

Abstract

The invention relates to the technical field of methanol fuel flameless combustion equipment, in particular to a flameless combustion methanol fuel supply device, which comprises: the fuel tank comprises a fuel tank body, a first pressure valve and a first check valve, wherein the fuel tank cover is integrally provided with the first pressure valve; the first one-way valve is connected with the inlet end of the carbon tank through a pipeline, a second pressure valve is further arranged on the carbon tank body, the outlet end of the second pressure valve is provided with a second one-way valve, and an activated carbon adsorption device is further arranged in the carbon tank; the inlet end of the vacuum pump is connected with the second one-way valve through a pipeline; and the inlet end of the flameless combustion device is connected with the outlet end of the vacuum pump. The methanol fuel is stably adsorbed in the activated carbon in a gaseous state through the carbon tank, and the pressure in the fuel tank and the pressure in the carbon tank are kept dynamically and stably through the arrangement of the first pressure valve, the second pressure valve and the first one-way valve, so that the whole supply device is stable, safe and reliable.

Description

Flameless combustion methanol fuel supply device

Technical Field

The invention relates to the technical field of methanol fuel flameless combustion equipment, in particular to a flameless combustion methanol fuel supply device.

Background

The methanol fuel flameless combustion device mainly comprises a flameless combustion catalyst, a flameless combustion reaction chamber and other components. The mixed gas of the methanol steam and the air sucked out by the vacuum pump passes through a flameless combustion catalyst to generate oxidation reaction under the action of the catalyst, and carbon dioxide, water vapor and a large amount of heat are generated. However, methanol is a colorless and transparent liquid and has dangerous characteristics of volatility, flammability, explosiveness and the like, so a safe and reliable flameless combustion methanol fuel supply device is needed.

Disclosure of Invention

In view of the shortcomings of the prior art, the present invention provides a flameless combustion methanol fuel supply apparatus, comprising:

the fuel tank comprises a fuel tank body, a first pressure valve and a first check valve, wherein the fuel tank cover is integrally provided with the first pressure valve;

the first one-way valve is connected with the inlet end of the carbon tank through a pipeline, a second pressure valve is further arranged on the carbon tank body, the outlet end of the second pressure valve is provided with a second one-way valve, and an activated carbon adsorption device is further arranged in the carbon tank;

the inlet end of the vacuum pump is connected with the second one-way valve through a pipeline;

and the inlet end of the flameless combustion device is connected with the outlet end of the vacuum pump.

Preferably, the fuel tank includes:

a tank comprising at least one inner layer of thermoplastic material and at least one outer layer of fibre composite material, which are materially bonded to one another and a polyethylene-based multilayer extrusion is provided as the inner layer, wherein the inner and outer layers are connected to one another by means of an adhesive;

the box cover is detachably arranged on the surface of the box body and comprises a cylindrical connecting body, the upper end of the connecting body is connected with a spiral cover, a partition part is arranged in the connecting body, an air cavity communicated with the outside is formed between the partition part and the spiral cover, a valve cavity is formed in the lower end surface of the partition part, an air passing hole communicated with the air cavity is formed in the bottom surface of the valve cavity, a valve core is connected in the valve cavity in a sliding mode along the axial direction of the connecting body, an air inlet channel is formed between the outer wall of the valve core and the inner wall of the valve cavity, a gravity ball capable of pushing the valve core to enable the valve core to block the air inlet channel when the connecting body is inclined and the inclination angle is larger than a set value or the connecting body is inverted is further arranged in the connecting body, a pressure relief hole is further formed in the valve core, the upper end of the pressure relief hole, the other end is communicated with the port at the lower end of the connecting body;

preferably, a cylindrical filter tank is arranged on the upper end face of the valve core, the upper end port of the filter tank is opposite to the air passing hole, the pressure relief hole is communicated with the filter tank, a cylindrical felt block is fixedly connected in the filter tank, a cylindrical limiting frame is also fixedly connected in the filter tank, an air outlet hole is arranged on the upper end face of the limiting frame and is opposite to the air passing hole, a positioning convex edge is circumferentially arranged on the outer edge of the lower end of the felt block, the felt block is positioned in the limiting frame, the lower end port edge of the limiting frame is pressed against the positioning convex edge, a connecting groove is circumferentially arranged on the inner wall of the filter tank, a connecting convex edge is circumferentially arranged on the outer wall of the limiting frame, the connecting convex edge is clamped in the connecting groove, the bottom face of the filter tank is conical, the hole penetrates through the top of the pressure relief on the bottom face of the filter tank, the valve core is cylindrical, and a sealing groove is circumferentially arranged on the outer, the sealing groove is internally and fixedly connected with a sealing ring, the valve cavity is in a cylindrical shape, a sealing conical surface is arranged at the edge of a lower end port of the valve cavity, the sealing ring is tightly pressed on the sealing conical surface when a connector inclines and an inclination angle is larger than a set value or the connector is inverted, the cylindrical bottom shell is fixedly connected onto the lower end face of the partition part, the upper end of the bottom shell is in an open shape, the upper end port of the bottom shell is opposite to the lower end port of the valve cavity, the lower end of the bottom shell is sealed, the gravity ball is located in the bottom shell, the lower end face of the bottom shell is in a conical shape, the small end of the.

Preferably, the edge of the upper end port of the bottom shell is circumferentially provided with an outward connecting flange, a positioning hole is formed in the connecting flange, a positioning column is arranged on the lower end face of the partition part, the connecting flange is pressed against the lower end face of the partition part and is inserted into the positioning hole, the connecting flange is fixedly connected with the partition part through a screw, the connecting flange of the bottom shell is covered on the buffer air passage, one end of the buffer air passage is provided with an air outlet notch which is communicated with the inner cavity of the bottom shell, the other end of the buffer air passage is provided with an air inlet notch which extends to the inner side wall of the connecting body, a gap communicated with the air inlet notch is formed between the peripheral wall of the connecting flange and the inner side wall of the connecting body, the buffer air passage comprises a plurality of buffer sections and a plurality of air passing sections, and the depth of the buffer sections is, the width of the buffer section is larger than that of the air passing section, and the buffer sections and the air passing sections are distributed at intervals.

Preferably, the inside of the tank body is further provided with a wave-motion eliminating device comprising a wave-motion eliminating plate fixed inside the tank body for suppressing the wave motion of the fuel; and a clamping member having a welding part welded and fixed on the inner wall of the box body and a mounting part for mounting the fluctuation elimination plate.

Preferably, the fuel tank further comprises a liquid level sensing device, wherein the liquid level sensing device comprises a vertical guide pipe and a floater, the lower end of the vertical guide pipe is sealed, the guide pipe and the floater form sliding connection, at least one group of signal units formed by magnetic induction sensors are arranged in the guide pipe, and an induction magnet is arranged in the floater.

Preferably, the signal unit comprises a normally open reed pipe and a signal resistor, one end of the reed pipe in the signal unit is connected with one end of the signal resistor, the other ends of the reed pipe and the signal resistor in the signal unit are respectively connected with one end of an output signal line, the other ends of the two output signal lines penetrate out of the upper end of the guide pipe so as to form the output end of the sensing device, a guide through hole matched with the guide pipe is formed in the center of the float so as to enable the float to be annular, the guide pipe is inserted into the guide through hole of the float, a radially extending mounting disc connected with the fuel tank is arranged at the upper end of the guide pipe, a sealing gasket is arranged on the lower side of the mounting disc, screw through holes which are annularly distributed and penetrate through the sealing gasket are formed in the upper surface of the mounting disc, and the output end of the mounting disc is connected with a connecting terminal, the reed switches in each group of signal units are arranged in the guide pipe at equal intervals along the axial direction, output signal lines connected with the reed switches in each group of signal units are connected in parallel, and output signal lines connected with the signal resistors in each group of signal units are connected in parallel.

Preferably, an elastic guide sleeve is fixedly arranged on a guide through hole in the center of the float, a plurality of elastic strips which extend axially and are uniformly distributed in the circumferential direction are respectively arranged on the edges of the upper end and the lower end of the elastic guide sleeve, and the free ends of the elastic strips incline towards the axis of the elastic guide sleeve, so that the free ends of the elastic strips are attached to the outer side wall of the guide pipe.

Preferably, the vacuum pump comprises a pump shell and an electric motor, the electric motor is provided with a motor shaft extending into the pump shell, two screw rods matched with the electric motor are transversely erected in the pump shell, a bearing is connected between two ends of each screw rod and the pump shell, the vacuum pump is characterized in that each screw rod comprises an external transmission section, a positioning fixing section, a left screw thread section and a right screw thread section, a connecting transition section is formed between the left screw thread section and the right screw thread section, a plurality of rotary blocks are arranged on the connecting transition section, the plurality of rotary blocks are uniformly and rotatably distributed around the circumferential direction of the connecting transition section, spiral pieces are arranged at the tail ends of the left screw thread section and the right screw thread section, the spiral pieces extend in a bending way to be attached to the side edges of the rotary blocks and the side edges, an air outlet and two air inlets are arranged on the lower end wall of the pump shell, and the, the motor pump is characterized in that the motor pump is internally communicated with a pump shell, the gas outlet is communicated with the connecting transition section, a guide vane plate is arranged on one side end face, away from the connecting transition section, of the left thread section and the right thread section, the guide vane plate is fan-shaped, a plurality of heat dissipation strips are arranged on the outer surface of the pump shell and are uniformly distributed at equal intervals along the length direction of the pump shell, a safety cavity formed by inward concave is formed in the end face of one end, connected with the motor, of the pump shell, a transmission fixing piece is arranged in the safety cavity, one end of the transmission fixing piece is abutted against the inner end face of the pump shell, a positioning groove formed by inward concave is formed in the front end of the positioning fixing section, a positioning pin is arranged at the position, corresponding to the positioning groove, of the inner wall of the pump.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a flameless combustion methanol fuel supply assembly according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of a case structure according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of a cover according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the structure of the cover in one embodiment of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 4;

FIG. 6 is a cross-sectional view of the structure of an embodiment of the present invention with the lid tilted;

FIG. 7 is a sectional view of the structure of an embodiment of the present invention with the cover inverted;

FIG. 8 is a bottom view of the structure of the connector in accordance with one embodiment of the present invention;

FIG. 9 is a top view of the structure of the cover in one embodiment of the present invention;

FIG. 10 is a cross-sectional view of the structure at B-B in FIG. 9;

FIG. 11 is a perspective view of a wave elimination device in an embodiment of the invention;

FIG. 12 is a perspective view of a weld of a clamping member in accordance with an embodiment of the invention;

FIG. 13 is a perspective view of a mounting portion of a clamping member in accordance with an embodiment of the present invention;

FIG. 14 is a perspective view of a wave elimination plate secured to a holding member in one embodiment of the invention;

fig. 15 is a perspective view of the wave elimination plate fixed to the holding member in fig. 14 as viewed from the other side;

FIG. 16 is a schematic view of a liquid level sensing apparatus according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of signal unit connections in accordance with one embodiment of the present invention;

FIG. 18 is a schematic view showing a connection structure of a float and a guide tube according to an embodiment of the present invention;

FIG. 19 is a front view of a vacuum pump in accordance with an embodiment of the present invention;

FIG. 20 is a side view of a vacuum pump in accordance with an embodiment of the present invention;

FIG. 21 is a schematic view showing the overall structure of a screw in a vacuum pump according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

As shown in fig. 1, the present invention provides a flameless combustion methanol fuel supply apparatus comprising:

the fuel tank 1, the first pressure valve 2 is integrally arranged on the tank cover of the fuel tank 1, and the first check valve 3 is arranged on the upper surface of the tank body of the fuel tank 1;

the carbon tank 4 is characterized in that the first one-way valve 3 is connected with the inlet end of the carbon tank 4 through a pipeline, a second pressure valve 5 is further arranged on the carbon tank 4, the outlet end of the second pressure valve is provided with a second one-way valve 6, and an activated carbon adsorption device 7 is further arranged inside the carbon tank 4;

a vacuum pump 8, the inlet end of which is connected with the second one-way valve 6 through a pipeline;

and a flameless combustion device 9, the inlet end of which is connected with the outlet end of the vacuum pump 8.

The working principle and the beneficial effects of the technical scheme are as follows:

in the invention, methanol fuel is stored in a fuel tank, the structure of the fuel tank is the same as that of a gasoline fuel tank or a diesel fuel tank in the prior art, when the methanol in the fuel tank is reduced, the internal pressure is reduced, and when the methanol in the fuel tank is reduced to a certain limit value, a first pressure valve is opened under the action of atmospheric pressure, and outside air enters the fuel tank to ensure the normal pressure in the fuel tank; when the pressure in the fuel tank increases to a certain limit value, the first check valve is opened by the pressure, and the methanol vapor enters the carbon canister through the pipeline.

In the invention, when methanol vapor enters the carbon tank through the one-way valve of the fuel tank through a pipeline, the pressure in the carbon tank is increased, when the pressure is increased to a certain limit value, the second pressure valve is pushed open, the methanol vapor can push air in the carbon tank out of the carbon tank, then activated carbon in the carbon tank can timely adsorb the methanol vapor and cause the pressure in the carbon tank to be reduced, but when the pressure is reduced to a certain limit value, the second pressure valve is pushed open by the atmospheric pressure, outside air enters the carbon tank, and at the moment, the mixed gas of the methanol vapor and the air exists in the carbon tank, and the activated carbon can adsorb and store the mixed gas; after repeated circulation, the activated carbon can adsorb methanol vapor and air and store the methanol vapor and the air in the carbon tank.

In the present invention, the first pressure valve is a one-way air pressure valve, and the second pressure valve is a two-way air pressure valve.

The flameless combustion device is the prior art and mainly comprises a flameless combustion catalyst, a flameless combustion reaction chamber and other components. When the device is used, the vacuum pump and the second one-way valve are opened, the methanol steam and the air in the carbon tank are sucked out and sent into the flameless combustion device, and the mixed gas of the methanol steam and the air sucked out by the vacuum pump passes through the flameless combustion catalyst to undergo an oxidation reaction under the action of the catalyst, so that carbon dioxide, water vapor and a large amount of heat are generated.

The methanol fuel is stably adsorbed in the activated carbon in a gaseous state through the carbon tank, and the pressure in the fuel tank and the pressure in the carbon tank are kept dynamically and stably through the arrangement of the first pressure valve, the second pressure valve and the first one-way valve, so that the whole supply device is stable, safe and reliable.

As shown in fig. 2 through 5, in one embodiment,

the fuel tank 1 includes: a case body 10 and a case cover 11,

the tank 10, includes an inner layer 10-1 of thermoplastic material and an outer layer 10-2 of fibre composite material, the outer layer 10-2 comprising continuous fibres, such as glass fibres or carbon fibres, in a matrix of thermosetting room temperature setting material. The room temperature curing material may be, for example, an epoxy resin with a room temperature activatable hardener. The outer layer 10-2 completely covers the fuel tank and forms a material bond with the inner layer over all surface areas. The inner layer 10-1 is a four layer co-extrusion based on HDPE comprising an inner HDPE layer 10-3, a first adhesive layer 10-4 based on LDPE, an EVOH barrier layer 10-5 and a second outer adhesive layer 10-6, the second outer adhesive layer 10-6 forming a material bond with the fibre composite outer layer 10-2.

This "sandwich construction" of the tank described above means that the tank has a relatively rigid, lightweight outer layer, while the inner layer has a certain flexibility, in particular to ensure impermeability of the entire tank system. The fuel tank according to the invention combines the advantages of a high-strength rigid structure (while also having a certain fragility) with the advantages of a casing that yields within certain limits and is impermeable to hydrocarbons, which is able to absorb the corresponding impact loads in the event of a collision.

In this embodiment, the cover 11 is detachably disposed on the upper surface of the housing 10, and includes a cylindrical connecting body 11-1, a cap 11-2 is connected to the upper end of the connecting body 11-1, an external thread is formed on the outer wall of the connecting body 11-1 for screwing to the opening of the fuel tank, the cap 11-2 is rotatably connected to the upper end of the connecting body 11-1, and a fitting structure of a protruding tooth and a latch is provided between the cap 11-2 and the connecting body 11-1, so that when the cap 11-2 is screwed to a certain extent, slipping occurs between the cap 11-2 and the connecting body 11-1 to prevent the user from being screwed too tightly. The connector 11-1 is internally provided with a partition part 11-11, an air cavity 11-21 is formed between the partition part 11-11 and the rotary cover 11-2, the connection structure between the rotary cover 11-2 and the connector 11-1 enables the air cavity 11-21 to be communicated with the outside, the lower end surface of the partition part 11-11 is provided with a valve cavity 11-111, the bottom surface of the valve cavity 11-111 is provided with an air passing hole 11-112 communicated with the air cavity 11-21, the valve cavity 11-111 is internally connected with a valve core 11-3 in an axial sliding way along the connector 11-1, an air inlet channel 11-113 is formed between the outer wall of the valve core 11-3 and the inner wall of the valve cavity 11-111, the valve core 11-3 is also provided with a pressure relief hole 11-31, and the upper end of the pressure relief hole 11-31, the lower end is communicated with the port at the lower end of the connecting body 11-1, a gravity ball 11-4 which can push the valve core 11-3 to lead the valve core 11-3 to block the air inlet channel 11-113 when the connecting body 11-1 inclines and the inclination angle is larger than a set value or the connecting body 11-1 is inverted is arranged in the connecting body 11-1, an air inlet channel 11-113 is formed between the outer wall of the valve core 11-3 and the inner wall of the valve cavity 11-111 under the normal use state, the upper ends of the air inlet channels 11-113 are communicated with the air passing holes 11-112, and the lower ends are communicated with the inner cavity of the fuel tank, therefore, when in use, the methanol in the fuel tank is gradually reduced, the outside air can pass through the air cavities 11-21 and the air inlet channels 11-113 to enter the fuel tank, so that the methanol in the fuel tank is prevented from being reduced to generate negative pressure to prevent the methanol from being pumped out; in high-temperature weather, the temperature in the fuel tank rises, the air pressure in the fuel tank is increased at the moment, the air pressure can push the valve core 11-3 upwards, namely the valve core 11-3 blocks the air inlet channel 11-113, the inner cavity of the fuel tank can still be communicated with the air passing hole 11-112 through the pressure relief hole 11-31 at the moment, the aperture of the pressure relief hole 11-31 is smaller, the air in the fuel tank can be gradually discharged out of the fuel tank through the pressure relief hole 11-31, so that the pressure is relieved to the inner cavity of the oil tank, and the oil injection phenomenon is avoided when the fuel tank cover; when the fuel tank inclines and the inclination angle is larger than a set value or the fuel tank is inverted, the gravity ball 11-4 can be pressed on the valve core 11-3, so that the valve core 11-3 is pushed to enable the valve core 11-3 to block the air inlet channel 11-113, at the moment, the inner cavity of the fuel tank is only communicated with the air through hole 11-112 through the pressure relief hole 11-31, the aperture of the pressure relief hole 11-31 is small, negative pressure can be generated in the fuel tank after methanol flows out of the pressure relief hole 11-31, the negative pressure can prevent the methanol from flowing out, and therefore the leakage amount of the methanol can be reduced, and the use is safer and.

As shown in fig. 6-7, in one embodiment,

the upper end face of the valve core 11-3 is provided with a cylindrical filter tank 11-32, the upper end port of the filter tank 11-32 is opposite to the air passing hole 11-112, the pressure relief hole 11-31 is communicated with the filter tank 11-32, the filter tank 11-32 is fixedly connected with a columnar felt block 11-5, the valve core 11-3 is moved or not, the upper end port of the filter tank 11-32 is always opposite to the air passing hole 11-112, namely, the inner cavity of the fuel tank is communicated with the air passing hole 11-112 through the pressure relief hole 11-31 regardless of the opening or the blocking of the air inlet channel 11-113, when the temperature in the fuel tank rises, the gas mixed with methanol particles in the fuel tank passes through the pressure relief hole 11-31 and the filter tank 11-32, the felt block 11-5 in the filter tank 11-32 can adhere the methanol particles, therefore, the passing gas is filtered, the methanol leakage is reduced, and when the fuel tank is inclined to be more than a set value or is inverted, the felt blocks 5 can also block the methanol when the methanol passes through the pressure relief holes 11-31, the throughput of the methanol is reduced, and the methanol leakage is further reduced. A cylindrical limiting frame 11-6 is fixedly connected in the filter tank 11-32, an air outlet 11-61 is arranged on the end face of the upper end of the limiting frame 11-6, the air outlet 11-61 is opposite to the air passing hole 11-112, a positioning convex edge 11-51 is arranged on the circumferential direction of the outer edge of the lower end of the felt block 11-5, the felt block 11-5 is positioned in the limiting frame 11-6, the edge of the port of the lower end of the limiting frame 11-6 is pressed against the positioning convex edge 11-51, the felt block 11-5 lacks hardness, so that the felt block 11-6 is supported to avoid the deformation of the felt block 11-5, the limiting frame 11-6 is pressed against the positioning convex edge 11-51 of the felt block 11-5 to position the felt block 11-5, and the gas in the fuel tank can pass through the felt block 5 and then sequentially pass through the air outlet 11-61, The air passing holes 11-112 and the air chambers 11-21 are discharged to the outside of the fuel tank. The inner wall of the filter tank 11-32 is circumferentially provided with a connecting groove 11-33, the outer wall of the limiting frame 11-6 is circumferentially provided with a connecting convex edge 11-62, the connecting convex edge 11-62 is clamped in the connecting groove 11-33, the limiting frame 11-6 is fixedly connected in the filter tank 11-32 in a matching way with the connecting groove 11-33 through the connecting convex edge 11-62, the structure is simple and stable, the bottom surface of the filter tank 11-32 is conical, the pressure relief hole 11-31 penetrates through the top point of the bottom surface of the filter tank 11-32, and when a certain amount of methanol is adhered to the felt block 11-5, the leaked methanol can be collected from the bottom surface of the filter tank 11-32, enters the pressure relief hole 11-31 and returns to the. The valve core 11-3 is columnar, a sealing groove 11-34 is formed in the circumferential direction of the outer circumferential wall of the valve core 11-3, a sealing ring 11-35 is fixedly connected in the sealing groove 11-34, the valve cavity 11-111 is cylindrical, a sealing conical surface 11-114 is arranged at the edge of a lower end port of the valve cavity 11-111, when the connector 11-1 is inclined and the inclination angle is larger than a set value or the connector 11-1 is inverted, the sealing ring 11-35 is pressed on the sealing conical surface 11-114, namely, the valve core 11-3 can move towards the direction of the air cavity 11-21 under the action of a gravity ball 11-4 or high-pressure air in a fuel tank, and therefore the valve core 11-3 can enable the sealing ring 11-35 to be pressed on the sealing conical surface 11-114. The lower end face of the partition part 11-11 is fixedly connected with a cylindrical bottom shell 11-7, the upper end of the bottom shell 11-7 is open, the upper end port of the bottom shell 11-7 is opposite to the lower end port of the valve cavity 11-111, the lower end of the bottom shell 11-7 is closed, the gravity ball 11-4 is positioned in the bottom shell 11-7, the bottom shell 11-7 is used for supporting and limiting the gravity ball 11-4, the gravity ball 11-4 can only roll in the bottom shell 11-7, when the inclination angle of the fuel tank is smaller than a set value, the gravity ball 11-4 abuts against the bottom face of the bottom shell 11-7, the lower end of the valve core 11-3 abuts against the gravity ball 11-4 at the moment, and the air inlet channel 11-113 is in an open. The end face of the lower end of the bottom shell 11-7 is conical, the small end of the bottom shell is downward, the position of the gravity ball 11-4 can be restrained, namely when the inclined angle of the fuel tank is smaller than a set value, the gravity ball 11-4 is positioned at the central position of the bottom surface of the bottom shell 11-7, the valve core 11-3 is abutted against the gravity ball 11-4, the diameter of the inner side wall of the bottom shell 11-7 is gradually increased from bottom to top, when the inclined angle of the fuel tank is larger than the set value, the gravity ball 11-4 can roll along the bottom surface and the inner side wall of the bottom shell 11-7 and push the valve core 11-3, so that the valve core 11-3 moves and blocks the air inlet channel 11-113, wherein the diameter of the inner side wall of the bottom shell 11-7 is gradually increased from bottom to top, namely the inner, the gravity ball 11-4 is sensitive to sensing and reacts faster. The edge of the upper end port of the bottom shell 11-7 is circumferentially provided with an outward connecting flange 11-71, the connecting flange 11-71 is provided with a positioning hole 11-72, the lower end face of the partition part 11-11 is provided with a positioning column 11-115, the connecting flange 11-71 is pressed against the lower end face of the partition part 11-11 and is inserted into the positioning hole 11-72 of the positioning column 11-115, the connecting flange 11-71 and the partition part 11-11 are fixedly connected through a screw 11-73, the connecting flange 11-71 is used for stably fixing the bottom shell 11-7, the positioning hole 11-72 is matched with the positioning column 11-115, the screw 11-73 is conveniently installed when the bottom shell 11-7 is assembled, and the bottom shell is conveniently disassembled and assembled through the screw 11-73.

As shown in fig. 8-10, in one embodiment,

the lower end face of the partition part 11-11 is provided with an arc-shaped buffer air passage 11-8 surrounding the valve cavity 11-111, a connecting flange 11-71 of the bottom shell 11-7 is covered on the buffer air passage 11-8, one end of the buffer air passage 11-8 is provided with an air outlet notch 11-82, the air outlet notch 11-82 is communicated with the inner cavity of the bottom shell 11-7, the other end of the buffer air passage 11-8 is provided with an air inlet notch 11-81, the air inlet notch 11-81 extends to the inner side wall of the connector 11-1, a gap communicated with the air inlet notch 11-81 is arranged between the outer peripheral wall of the connecting flange 11-71 and the inner side wall of the connector 11-1, high-pressure air in the fuel tank passes through the gap between the outer peripheral wall of the connecting flange 11-71 and the inner side wall of the connector 11-1 and then enters the buffer, then, the air flows around the valve cavity 11-111 along the buffer air passage 11-8 and enters the inner cavity of the bottom shell 11-7 through the air outlet gap 11-82, and the air flow can collide with the inner wall of the buffer air passage 11-8 when flowing in the buffer air passage 11-8, so that the air flow rate is reduced, the impact of the air flow on the valve core 11-3, the felt block 11-5 and other parts is reduced, and the filtering effect is improved. The buffer air passage 11-8 comprises a plurality of buffer sections 11-83 and a plurality of air passing sections 11-84, the depth of the buffer sections 11-83 is larger than that of the air passing sections 11-84, the width of the buffer sections 11-83 is larger than that of the air passing sections 11-84, the buffer sections 11-83 and the air passing sections 11-84 are distributed at intervals, air flow repeatedly passes through the buffer sections 11-83 and the air passing sections 11-84 when flowing in the buffer air passage 11-8, the flow speed of the air flow is reduced through the change of the area, and the buffer effect is better.

As shown in fig. 11-15, in one embodiment,

the casing 10 is divided into upper and lower parts in the thickness direction.

2 holding members 12-2 are welded and fixed to the top surface of the upper inner wall at predetermined intervals, and a wave-motion canceling plate 12-1 is fixed to each of the holding members 12-2.

In view of the fixing work of the wave elimination plate 12-1, it is preferable to fix each of the holding members 12-2 in the vicinity of the first check valve.

Each clip member 12-2 is formed of a resin material. Any resin material may be used as the resin material forming the clip member 12-2 as long as it can be welded to the case 10, but in the present embodiment, the same material as the case 10 is used. Each of the clamp members 12-2 has a structure including: a welding part 12-22 protruding from one surface of a thin base part 12-21 in a rectangular parallelepiped shape; a mounting portion 12-23 protruding from the other surface of the base portion 12-21, the other surface of the base portion 12-21 being opposite to the surface from which the welding portion 12-22 protrudes.

The weld 12-22 is made up of 2 hook-shaped projections 12-22a, 12-22 b. The protruded welding portions 12 to 22 are heated and welded to the top surface of the inner wall of the upper portion 10 a.

The mounting portion 12-23 has a plurality of locking claws 12-23a to 12-23d, the plurality of locking claws 12-23a to 12-23d protruding from the other surface of the base portion 12-21 in respective independent manners and arranged in a circumferential shape. Each of the locking claws 12-23a to 12-23d is formed in a diameter-reduced shape having elasticity. When receiving a pressing force from the outer circumferential side toward the inner circumferential side, each of the locking claws 23a to 23d is reduced in diameter toward the circumferential center. When the pressing force is released, the respective locking claws 12-23a to 12-23d, which have been reduced in diameter, are expanded to the outer peripheral side by the elastic force and return to the original state.

When the case 10 is molded, the respective clamp members 12-2 are welded to predetermined positions on the inner wall of the case 10.

The fluctuation elimination plate 12-1 is a plate-like member that suppresses fluctuation of the fuel in the fuel tank 1.

The wave elimination plate 12-1 is constituted by a 1 st shape portion 12-31 having a larger height dimension, a 2 nd shape portion 12-32 having a smaller height dimension, and 2 fitting fixing portions 12-36. The fluctuation elimination plate 12-1 is made of resin and is integrally molded. The 1 st shape portion 12-31 has 2 installation fixing portions 12-36, which are portions installed on the holding member 12-2, at an upper portion thereof. The 2 nd shape part 12-32 is formed with the same thickness as the 1 st shape part 12-31, and the 2 nd shape part 12-32 is bent to one surface side at a prescribed angle.

A plurality of circular holes 12-33 are formed through both the 1 st and 2 nd shaped parts 12-31 and 12-32. The plurality of circular holes 12 to 33 are provided for the purpose of suppressing the fuel from fluctuating by passing the fuel through the plurality of circular holes 12 to 33 by a predetermined amount when the fuel is fluctuated in association with the fluctuation of the case 10 in which the fluctuation elimination plate 12-1 is disposed.

The mounting-fixing portion 12-36 has a flat portion 12-36b, and the flat portion 12-36b is erected across 2 support portions 12-36a vertically provided on the other surface of the 1 st shape portion 12-31. A through locking hole 12-37 is formed in the center of the flat surface portion 12-36 b. The planar portion 12-36 is located above the upper end of the 1 st shape portion 12-31.

The diameter of the locking hole 12-37 is slightly smaller than the maximum outer peripheral diameter of the locking claws 12-23a to 12-23d arranged in the circumferential shape of the holding member 12-2. By aligning the locking hole 12-37 with the tip end side of each of the locking claws 12-23a to 12-23d, the wave-canceling plate 12-1 is pressed against the base portion 12-21 side of the holding member 12-2, and each of the locking claws 12-23a to 12-23d is reduced in diameter, whereby the locking hole 12-37 is moved to the position of the reduced diameter portion of the locking claw 12-23a to 12-23 d. At this time, the locking claws 12-23a to 12-23d are expanded by the elastic force and returned to their original positions, and their reduced diameter portions are fitted into the locking holes 12-37. That is, the state at this time is a state in which the attachment fixing portion 12-36 of the wave elimination plate 12-1 is fixed to the attachment portion 12-23 of the clip member 12-2.

The implementation steps of this embodiment are:

first, 2 clamp members 12-2 are welded in advance to predetermined positions in the vicinity of the first check valve 3 on the inner wall of the fuel tank 1.

Next, the engaging holes 12-37 of the respective attachment fixing portions 12-36 of the wave elimination plate 12-1 are aligned with the tip end sides of the engaging claws 12-23a to 12-23d of the attachment portions 12-23 of the respective holding members 12-2.

Then, the wave canceling plate 12-1 is pressed toward the base portion 12-21 side of the holding member 12-2, and the locking claws 12-23a to 12-23d are fitted into the locking holes 12-37, and the reduced diameter portions of the locking claws 12-23a to 12-23d are fitted into the locking holes 12-37.

Accordingly, the mounting-fixing portions 12-36 are fixed to the mounting portions 12-23, and thus the wave elimination plate 12-1 is fixed to the clamping member 12-2 welded to the inner wall of the case 10. Therefore, the wave elimination plate 12-1 is disposed at a predetermined position in the case 10.

The beneficial effect of this embodiment does:

as described above, the present embodiment has the fluctuation elimination plate 12-1 and at least 2 holding members 12-2, wherein the fluctuation elimination plate 12-1 is fixed inside the resin-made fuel tank 1 for suppressing the fluctuation of the fuel; the at least 2 holding members 12-2 are made of resin, and have: welding portions 12 to 22 welded and fixed to the inner wall of the fuel tank 1; and a mounting portion 12-23 for mounting the wave elimination plate 12-1.

When this structure is adopted, the holding member 12-2 is fixed by welding to a predetermined position on the inner wall of the fuel tank 1, and the fluctuation elimination plate 12-1 is inserted into the fuel tank 1 and fixed to the holding member 12-2. This makes it possible to easily fix the fluctuation elimination plate 12-1 to a predetermined position in the fuel tank 1 with high accuracy.

As shown in fig. 16-18, in one embodiment,

the fuel tank 1 further includes a liquid level sensing device 13 including a cylindrical guide pipe 13-1 vertically installed in the fuel tank, and a float 13-2 having a hollow space therein, and a lower end of the guide pipe 13-1 is sealed to prevent methanol in the fuel tank 1 from entering the guide pipe 13-1. The floater 13-2 is cylindrical, a guide through hole 13-21 matched with the guide pipe 13-1 is coaxially arranged at the center of the floater 13-2, so that the cavity of the floater 13-2 is annular, and the guide pipe 13-1 is inserted into the guide through hole 13-21 of the floater 13-2, so that the guide pipe 13-1 and the floater 13-2 form sliding connection. The upper end of the guide pipe 13-1 is fixedly provided with a circular mounting disc 13-3 extending radially, the lower side of the mounting disc 13-3 is provided with a sealing gasket 13-4, and the upper surface of the mounting disc 13-3 is provided with 13-6 screw through holes 13-31 which are uniformly distributed annularly and penetrate through the sealing gasket 13-4. Thus, the guide pipe 13-1 together with the float 13-2 can be put into the fuel tank through the mounting opening on the upper side of the fuel tank, the mounting plate 13-3 and the gasket 13-4 are butted with the flange of the mounting opening, and then the mounting plate 13-3 is hermetically fixed on the flange of the mounting opening by using screws in the screw through holes 13-31, so that the upper end of the guide pipe 13-1 can be connected to the upper side of the fuel tank.

In addition, at least one set of signal units is arranged in the guide tube 13-1, and the preferable number of the signal units is between 4 and 8. Each signal unit comprises a normally open reed switch 13-5 and a signal resistor 13-6, one end of the reed switch 13-5 in the signal unit is connected with one end of the signal resistor 13-6 so as to form a series connection, the other end of the reed switch 13-5 in the signal unit is connected with one end of an output signal line 13-7, the other end of the signal resistor 13-6 in the signal unit is also connected with one end of an output signal line 13-7, and the other ends of the two output signal lines 13-7 penetrate out of the upper end of the guide pipe 13-1 so as to form the output end of the sensing device. Of course, a sealing structure such as corresponding sealant is required to be arranged at the position where the output signal line 13-7 at the upper end of the guide tube 13-1 penetrates out. In addition, the output end can be connected with a connecting terminal 13-8, so that the plug connection between the output end and a control system of a vehicle is convenient. Of course, when the number of the signal units is larger than 13-1, the output signal lines 13-7 connected with the reed switches 13-5 in each group of signal units are connected in parallel, the output signal lines 13-7 connected with the signal resistors 13-6 in each group of signal units are connected in parallel, so that the connection of the output ends and the connecting terminals 13-8 is simplified, and the reed switches 13-5 in each group of signal units are arranged in the guide pipe 1 at equal intervals along the axial direction. Also, it is necessary to provide an annular induction magnet 22 in the annular cavity of the float 13-2.

The floater 13-2 with the cavity floats on the liquid level of the methanol under the buoyancy action of the methanol, when the liquid level of the methanol in the fuel tank changes, the floater 13-2 rises and falls along with the floating, when the induction magnet 13-22 in the floater 13-2 is close to one reed switch 13-5 in the guide pipe 13-1, the normally open reed switch 13-5 is conducted under the action of the magnetic field of the induction magnet 13-22, so that a resistance signal corresponding to the resistance value of the signal resistor 13-6 connected in series with the reed switch 13-5 can be output, for example, when the number of the signal units is 4, the resistance values of the signal resistors 13-6 in 4 signal units can be 20 ohms, 30 ohms, 40 ohms and 50 ohms in sequence, and thus the height of the liquid level of the methanol can be judged according to different resistance signals.

In order to increase the effective volume of the fuel tank, the ratio of the outer diameter to the height of the float 13-2 may be 1.2-1.8, which is advantageous for reducing the height of the float 13-2 while ensuring sufficient buoyancy of the float 13-2, i.e., the height of the portion of the float 13-2 which is submerged below the liquid level and exposed to the liquid level is low when the float is floating on the liquid level of methanol, thereby advantageously reducing the minimum level of methanol in the fuel tank and increasing the maximum level of methanol in the fuel tank.

In order to avoid the shaking of the float 13-2 and the collision noise generated between the guide pipe 13-1, a heat-shrinkable sleeve made of fluororubber is sleeved on the outer surface of the guide pipe 13-1, which not only facilitates installation, but also provides a buffer effect between the guide pipe 13-1 and the float 13-2. An elastic guide sleeve 13-9 can also be arranged between a guide through hole 13-21 in the center of the floater 13-2 and the guide sleeve 13-1, the elastic guide sleeve 13-9 is fixedly arranged on the guide through hole 13-21, a gap is arranged between the elastic guide sleeve 13-9 and the guide pipe 13-1, a plurality of elastic strips 13-91 which extend axially and are uniformly distributed in the circumferential direction are respectively arranged at the upper end edge and the lower end edge of the elastic guide sleeve 13-9, and the free ends of the elastic strips 13-91 are inclined towards the axis of the elastic guide sleeve 13-9, so that the free ends of the elastic strips 13-91 are attached to the outer side wall of the guide pipe 13-1. Thus, the floater 13-2 is elastically positioned and connected with the guide pipe 13-1 through the elastic strips 13-91 at the upper end and the lower end of the elastic guide sleeve 13-9. By controlling the parameters of the thickness, the width, the inclination angle and the like of the elastic strips 13-91, the elasticity of the elastic strips 13-91 can be conveniently controlled, and further the friction force between the elastic strips 13-91 and the guide pipe 13-1 is controlled, on one hand, the floater 13-2 can overcome the friction force with the guide pipe 13-1 by the self gravity or the buoyancy of methanol and slide on the guide pipe 13-1; on the other hand, the frequent rising and falling of the floater 13-2 caused by the instantaneous fluctuation of the methanol liquid level can not generate the fluctuating resistance signal.

As shown in fig. 19-21, in one embodiment,

the vacuum pump 8 comprises a pump shell 8-1 and an electric motor 8-2, the electric motor 8-2 is provided with a motor shaft 8-3 extending into the pump shell 8-1, two screw rods 8-4 matched with the electric motor 8-2 are transversely erected in the pump shell 8-1, a bearing 8-5 is connected between the two ends of each screw rod 8-4 and the pump shell 8-1, each screw rod 8-4 comprises an external transmission section 8-6, a positioning fixing section 8-7, a left screw thread section 8-8 and a right screw thread section 8-9, a connecting transition section 8-10 is formed between the left screw thread section 8-8 and the right screw thread section 8-9, a plurality of rotary blocks 8-11 are arranged on the connecting transition section 8-10, and a plurality of rotary blocks 8-11 are uniformly and rotationally distributed around the connecting transition section 8-10 in the circumferential direction, the tail ends of the left thread section 8-8 and the right thread section 8-9 are respectively provided with a spiral sheet 8-12, the spiral sheets 8-12 extend in a bending way to be attached to the side edge of the rotary block 8-11, the lower end wall of the pump shell 8-1 is provided with an air outlet 8-13 and two air inlets 8-14, the two air inlets 8-14 are respectively positioned at two sides of the pump shell 8-1 and are communicated with the inside of the pump shell 8-1, and the air outlet 8-13 is communicated with the connecting transition section 8-10. Guide vane plates 8-15 are arranged on the end faces of one sides, far away from the connecting transition sections 8-10, of the left thread sections 8-8 and the right thread sections 8-9, the guide vane plates 8-15 are fan-shaped, and the guide vane plates 8-15 can guide gas entering from the gas inlets 8-14, so that the gas regularly flows along a certain direction, noise generated by turbulent flow is avoided, and exhaust efficiency is influenced.

In order to improve the heat dissipation efficiency of the vacuum pump, a plurality of heat dissipation strips 8-16 are arranged on the outer surface of the pump shell 8-1, and the heat dissipation strips 8-16 are uniformly distributed at equal intervals along the length direction of the pump shell 8-1.

In order to effectively prevent impurities from entering the interior of the pump shell 8-1 to influence the transmission precision of the screw 8-4, a safety cavity 8-17 formed by inward recess is formed in the end face of one end, connected and fixed with the motor 8-2, of the pump shell 8-1, a transmission fixing piece 8-18 is arranged in the safety cavity 8-17, and one end of the transmission fixing piece 8-18 abuts against the inner end face of the pump shell 8-1.

In order to improve the positioning precision of the screw 8-4, the front end of the positioning fixing section 8-7 is provided with a positioning groove 8-19 which is formed by inwards sinking, a positioning pin 8-20 is arranged at the position of the inner wall of the pump shell 8-1 corresponding to the positioning groove 8-19, and the transverse bulge of the positioning pin 8-20 can be inserted into the positioning groove 8-19.

The contents of the present invention, which are not described in detail, can be adopted in the prior art, and therefore, are not described in detail.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A flameless combustion methanol fuel supply comprising:

the fuel tank comprises a fuel tank (1), wherein a first pressure valve (2) is integrally arranged on a tank cover of the fuel tank (1), and a first one-way valve (3) is further arranged on the upper surface of a tank body of the fuel tank (1);

the carbon tank (4), the first one-way valve (3) is connected with the inlet end of the carbon tank (4) through a pipeline, a second pressure valve (5) is further arranged on the carbon tank (4), the outlet end of the second pressure valve is provided with a second one-way valve (6), and an activated carbon adsorption device (7) is further arranged inside the carbon tank (4);

a vacuum pump (8) with an inlet end connected with the second one-way valve (6) through a pipeline;

a flameless combustion device (9) with an inlet end connected to an outlet end of the vacuum pump (8);

the first pressure valve (2) is a one-way air pressure valve and is opened under the action of atmospheric pressure when the pressure in the fuel tank (1) is reduced;

the second pressure valve (5) is a bidirectional air pressure valve;

the fuel tank (1) comprises:

-a tank (10) comprising at least one inner layer (10-1) of thermoplastic material and at least one outer layer (10-2) of fibre composite material, said inner layer (10-1) and said outer layer (10-2) being materially bonded to each other and a polyethylene-based multilayer extrusion being provided as an inner layer, wherein the inner layer (10-2) and the outer layer (10-3) are connected to each other by means of an adhesive;

the box cover (11) is detachably arranged on the surface of the box body (10) and comprises a cylindrical connecting body (11-1), the upper end of the connecting body (11-1) is connected with a rotary cover (11-2), a partition part (11-11) is arranged in the connecting body (11-1), an air cavity (11-21) communicated with the outside is formed between the partition part (11-11) and the rotary cover (11-2), a valve cavity (11-111) is formed in the lower end face of the partition part (11-11), an air passing hole (11-112) communicated with the air cavity (11-21) is formed in the bottom face of the valve cavity (11-111), a valve core (11-3) is axially connected in the valve cavity (11-111) in a sliding mode along the connecting body (11-1), an air inlet channel (11-113) is formed between the outer wall of the valve core (11-3) and the inner wall of the valve cavity (11-, a gravity ball (11-4) which can push the valve core (11-3) to enable the valve core (11-3) to block the air inlet channel (11-113) when the connecting body (11-1) is inclined and the inclination angle is larger than a set value or the connecting body (11-1) is inverted is also arranged in the connecting body (11-1), a pressure relief hole (11-31) is also arranged on the valve core (11-3), the upper ends of the pressure relief holes (11-31) are communicated with air passing holes (11-112), the lower end surface of the partition part (11-11) is provided with an arc-shaped buffer air passage (11-8) around the valve cavity (11-111), one end of the buffer air passage (11-8) is communicated with the lower end of the pressure relief hole (11-31), and the other end is communicated with the lower end port of the connector (11-1);

the upper end face of the valve core (11-3) is provided with a cylindrical filter tank (11-32), the upper end port of the filter tank (11-32) is opposite to the air passing hole (11-112), the pressure relief hole (11-31) is communicated with the filter tank (11-32), the filter tank (11-32) is fixedly connected with a cylindrical felt block (11-5), the filter tank (11-32) is also fixedly connected with a cylindrical limiting frame (11-6), the upper end face of the limiting frame (11-6) is provided with an air outlet (11-61), the air outlet (11-61) is opposite to the air passing hole (11-112), the outer edge of the lower end of the felt block (11-5) is circumferentially provided with a positioning convex edge (11-51), and the felt block (11-5) is positioned in the limiting frame (11-6), and the lower end port edge of the limiting frame (11-6) is pressed on the positioning convex edge (11-51), the inner wall of the filter tank (11-32) is circumferentially provided with a connecting groove (11-33), the outer wall of the limiting frame (11-6) is circumferentially provided with a connecting convex edge (11-62), the connecting convex edge (11-62) is clamped in the connecting groove (11-33), the bottom surface of the filter tank (11-32) is conical, the pressure relief hole (11-31) penetrates through the top of the bottom surface of the filter tank (11-32), the valve core (11-3) is columnar, the peripheral wall of the valve core (11-3) is circumferentially provided with a sealing groove (11-34), a sealing ring (11-35) is fixedly connected in the sealing groove (11-34), and the valve cavity (11-111) is cylindrical, the edge of the lower end port of the valve cavity (11-111) is provided with a sealing conical surface (11-114), when the connecting body (11-1) inclines and the inclination angle is larger than a set value or the connecting body (11-1) is inverted, the sealing ring (11-35) is pressed on the sealing conical surface (11-114), the lower end face of the partition part (11-11) is fixedly connected with a cylindrical bottom shell (11-7), the upper end of the bottom shell (11-7) is open, the upper end port of the bottom shell (11-7) is opposite to the lower end port of the valve cavity (11-111), the lower end of the bottom shell (11-7) is closed, the gravity ball (11-4) is positioned in the bottom shell (11-7), the end surface of the lower end of the bottom shell (11-7) is conical, the small end of the bottom shell is downward, and the diameter of the inner side wall of the bottom shell (11-7) is gradually increased from bottom to top;

the edge of the upper end port of the bottom shell (11-7) is circumferentially provided with an outward connecting flange (11-71), the connecting flange (11-71) is provided with a positioning hole (11-72), the lower end face of the partition part (11-11) is provided with a positioning column (11-115), the connecting flange (11-71) is pressed against the lower end face of the partition part (11-11) and is inserted into the positioning hole (11-72) of the positioning column (11-115), the connecting flange (11-71) and the partition part (11-11) are fixedly connected through a screw (11-73), the connecting flange (11-71) of the bottom shell (11-7) is covered on the buffer air passage (11-8), one end of the buffer air passage (11-8) is provided with an air outlet notch (11-82), the air outlet gap (11-82) is communicated with the inner cavity of the bottom shell (11-7), the other end of the buffer air passage (11-8) is provided with an air inlet gap (11-81), the air inlet gap (11-81) extends to the inner side wall of the connector (11-1), a gap communicated with the air inlet gap (11-81) is arranged between the outer peripheral wall of the connecting flange (11-71) and the inner side wall of the connector (11-1), the buffer air passage (11-8) comprises a plurality of buffer sections (11-83) and a plurality of air passing sections (11-84), the depth of the buffer sections (11-83) is larger than that of the gas passing sections (11-84), the width of the buffer sections (11-83) is larger than that of the gas passing sections (11-84), and the buffer sections (11-83) and the gas passing sections (11-84) are distributed at intervals.

2. A flameless combustion methanol fuel supply as claimed in claim 1, wherein: the tank body (10) is also internally provided with a fluctuation eliminating device (12) which comprises a fluctuation eliminating plate (12-1) fixed inside the tank body (10) and used for inhibiting the fluctuation of fuel; a clamping member (12-2) having a welding portion (12-22) welded and fixed on the inner wall of the case (10) and a mounting portion (12-23) for mounting the wave elimination plate (12-1).

3. A flameless combustion methanol fuel supply as claimed in claim 1, wherein: the fuel tank (1) further comprises a liquid level sensing device (13) which comprises a vertical guide pipe (13-1) with a sealed lower end and a floater (13-2), wherein the guide pipe (13-1) and the floater (13-2) are connected in a sliding mode, at least one group of signal units formed by magnetic induction sensors are arranged in the guide pipe (13-1), and sensing magnets (13-22) are arranged in the floater (13-2).

4. A flameless combustion methanol fuel supply as claimed in claim 3, wherein: the signal unit comprises a normally open reed pipe (13-5) and a signal resistor (13-6), one end of the reed pipe (13-5) in the signal unit is connected with one end of the signal resistor (13-6), the other ends of the reed pipe (13-5) and the signal resistor (13-6) in the signal unit are respectively connected with one end of an output signal line (13-7), the other ends of the two output signal lines (13-7) penetrate through the upper end of the guide pipe (13-1) to form the output end of the sensing device, a guide through hole (13-21) matched with the guide pipe (13-1) is arranged in the center of the floater (13-2) to enable the floater (13-2) to be annular, the guide pipe (13-1) is inserted into the guide through hole (13-21) of the floater (13-2), the upper end of the guide pipe (13-1) is provided with a radially extending mounting disc (13-3) connected with the fuel tank, the lower side of the mounting disc (13-3) is provided with a sealing gasket (13-4), the upper surface of the mounting disc (13-3) is provided with screw through holes (13-31) which are distributed annularly and penetrate through the sealing gasket (13-4), the output end of the mounting disc is connected with a wiring terminal (13-8), the reed pipes (13-5) in each group of signal units are arranged in the guide pipe (13-1) at equal intervals along the axial direction, output signal lines (13-7) connected with the reed pipes (13-5) in each group of signal units are connected in parallel, and output signal lines (13-7) connected with the signal resistors (13-6) in each group of signal units are connected in parallel.

5. The flameless combustion methanol fuel supply apparatus of claim 4, wherein: an elastic guide sleeve (13-9) is fixedly arranged on a guide through hole (13-21) in the center of the floater (13-2), a plurality of elastic strips (13-91) which integrally extend along the axial direction and are uniformly distributed in the circumferential direction are respectively arranged on the upper end edge and the lower end edge of the elastic guide sleeve (13-9), and the free ends of the elastic strips (13-91) incline towards the axis of the elastic guide sleeve (13-9), so that the free ends of the elastic strips (13-91) are attached to the outer side wall of the guide pipe (13-1).

6. A flameless combustion methanol fuel supply as claimed in claim 1, wherein: the vacuum pump (8) comprises a pump shell (8-1) and an electric motor (8-2), the electric motor (8-2) is provided with a motor shaft (8-3) extending into the pump shell (8-1), two screw rods (8-4) matched with the electric motor (8-2) are transversely erected in the pump shell (8-1), a bearing (8-5) is connected between the two ends of each screw rod (8-4) and the pump shell (8-1), each screw rod (8-4) comprises an external transmission section (8-6), a positioning fixing section (8-7), a left screw thread section (8-8) and a right screw thread section (8-9), and a connecting transition section (8-10) is formed between the left screw thread section (8) and the right screw thread section (9), the connecting transition section (8-10) is provided with a plurality of rotary blocks (8-11), the rotary blocks (8-11) are uniformly and rotationally distributed around the connecting transition section (8-10) in the circumferential direction, the tail ends of the left thread section (8-8) and the right thread section (8-9) are respectively provided with a spiral sheet (8-12), the spiral sheets (8-12) extend on the side edge of the rotary blocks (8-11) in a bending way and are attached to the side edge, the lower end wall of the pump shell (8-1) is provided with an air outlet (8-13) and two air inlets (8-14), the two air inlets (8-14) are respectively positioned at two sides of the pump shell (8-1) and are communicated with the inside of the pump shell (8-1), and the air outlet (8-13) is communicated with the connecting transition section (8-10), guide vane plates (8-15) are arranged on the end faces of one sides, far away from the connecting transition sections (8-10), of the left thread section (8-8) and the right thread section (8-9), the guide vane plates (8-15) are fan-shaped, a plurality of heat dissipation strips (8-16) are arranged on the outer surface of the pump shell (8-1), the heat dissipation strips (8-16) are uniformly distributed at equal intervals along the length direction of the pump shell (8-1), a safety cavity (8-17) formed by inward recess is formed in the end face of one end, connected and fixed with the motor (8-2), of the pump shell (8-1), a transmission fixing piece (8-18) is arranged in the safety cavity (8-17), one end of the transmission fixing piece (8-18) is abutted against the inner end face of the pump shell (8-1), the front end of the positioning fixing section (8-7) is provided with a positioning groove (8-19) which is formed by inwards sinking, a positioning pin (8-20) is arranged at the position of the inner wall of the pump shell (8-1) corresponding to the positioning groove (8-19), and the transverse bulge of the positioning pin (8-20) can be inserted into the positioning groove (8-19).