Digital test platform of methanol fuel supply system and test method thereof

Abstract

The application discloses a kind of methanol fuel supply system digital test platform and its test method, the platform can avoid the problem that methanol fuel is mixed with air when entering the oil inlet of test platform;When using, the methanol in the oil tank outside is pumped into the second pipeline by the oil pump, then enters the first pipeline, to squeeze the air in the second pipeline and the first pipeline into the connecting pipe, and enter the first cavity, then enter the second cavity through the long waist hole and the first through hole, finally discharged from the second through hole, in this process, as the air is discharged, methanol fuel will enter the first cavity, and after contacting with cylindrical float, it will float up, finally cylindrical float will be abutted to the lower surface of the sealing plate, and close the first through hole, so as to prevent methanol fuel from being discharged from the first through hole, and at this time most of the air in the first pipeline and the second pipeline has been discharged;Subsequently, methanol fuel can be normally pumped into the oil inlet of test device by oil pump to carry out the test of fuel supply system.

Description

Technical Field

[0001] This invention relates to the field of fuel supply testing, and more specifically to a digital testing platform and testing method for a methanol fuel supply system. Background Technology

[0002] With increasingly severe air pollution, emissions controls on ships are becoming increasingly stringent. Methanol, as a new type of green fuel, meets emission requirements, is readily available, and inexpensive. However, due to methanol's low flash point, flammability, explosiveness, toxicity, and volatility, it is used in gaseous injection, and existing fuel supply systems are not adequately suited for marine engines.

[0003] Specifically, the fuel supply system of a marine engine mainly includes: a fuel tank, an electric fuel pump, an injector, and a delivery pipe. The electric fuel pump draws fuel from the fuel tank and then delivers it to the injector through the delivery pipe. Existing electric fuel pumps mostly use magnetic pumps. Current technology directly installs an oil pump and pipeline to input methanol fuel into the test platform's inlet. This causes air to be mixed into the methanol fuel when it enters the test platform's inlet, leading to air involvement in subsequent testing and inaccurate test results. Summary of the Invention

[0004] The main objective of this invention is to provide a digital testing platform and testing method for a methanol fuel supply system, aiming to solve the problem in the prior art where direct installation of oil pumps and pipelines to input methanol fuel into the oil inlet of the testing platform results in air being mixed in when the methanol fuel enters the oil inlet of the testing platform.

[0005] The technical solution proposed in this invention is as follows: A digital testing platform for a methanol fuel supply system includes a testing device, a first pipe, a second pipe, an oil pump, a first cover, a circular pipe, a sealing plate, and a cylindrical float. One end of the first pipe is connected to the oil inlet of the testing device, and the first pipe is horizontally positioned. The second pipe is connected to the other end of the first pipe. The oil pump is located at the end of the second pipe furthest from the first pipe, and the oil pump is lower than the first pipe. The first cover is connected to the first pipe via a connecting pipe, and the first cover is higher than the first pipe. The first cover includes a horizontally positioned top plate. The sealing plate is disposed inside the first cover and is parallel to the top plate. The sealing plate covers the interior of the first cover. The enclosure is divided into a first cavity and a second cavity; the second cavity is located between the top plate and the sealing plate; the circular tube is connected to the side of the sealing plate away from the top plate, and the central axis of the circular tube is collinear with the central axis of the first cover; a first through hole for connecting the first cavity and the second cavity is provided at the center of the sealing plate; a second through hole is provided on the top plate; the cylindrical float is vertically slidably embedded in the circular tube, and the cylindrical float and the circular tube share the same central axis; an elongated hole is provided on the side wall of the circular tube, and the top of the elongated hole is close to the sealing plate; the upper surface of the cylindrical float can fit against the lower surface of the sealing plate to seal the first through hole; the inner wall of the circular tube is provided with a protrusion that can abut against the cylindrical float.

[0006] Preferably, the upper surface of the cylindrical float is provided with a first rubber layer; the first rubber layer is used to adhere to and abut against the lower surface of the sealing plate to seal the first through hole.

[0007] Preferably, it further includes a second cover and a sealing assembly; the second cover is disposed on the upper surface of the top plate and communicates with the second through hole; the central axis of the second cover is vertically arranged; a cuboid seat is embedded in the side wall of the second cover; one end of the cuboid seat is inside the second cover, and the other end of the cuboid seat is outside the second cover; a groove is formed on the side wall of the cuboid seat inside the second cover; a third through hole communicating with the groove is formed on the lower side wall of the cuboid seat outside the second cover; the central axis of the third through hole is vertically arranged and the third through hole is located below the groove; the sealing assembly is disposed in the second cover for sealing or opening the third through hole.

[0008] Preferably, the sealing assembly includes an electromagnet, a connecting plate, a first sliding rod, a plug, and a spring; the first sliding rod is slidably disposed through the side wall of the second cover; a protective cover is provided on the outer side wall of the second cover; one end of the first sliding rod extending out of the second cover is located inside the protective cover; the other end of the first sliding rod is connected to the plug; the first sliding rod is horizontally arranged, and the first sliding rod and the groove share a common central axis; the plug is horizontally slidably embedded in the groove; the plug has a through-hole; the central axis of the fourth through-hole is parallel to the central axis of the plug; the connecting plate... A connecting plate is vertically connected to one end of the first sliding rod located on the protective cover; one end of the spring is connected to the inner wall of the protective cover, and the other end of the spring is connected to the connecting plate; the spring force causes the plug to tend to abut against the inner bottom wall of the groove; when the plug abuts against the inner bottom wall of the groove, the plug seals the third through hole; the electromagnet is disposed on the inner wall of the protective cover, and the electromagnet is used to attract the connecting plate; when the electromagnet attracts the connecting plate, the plug does not abut against the inner bottom wall of the groove, and the plug does not seal the third through hole.

[0009] Preferably, it also includes a controller disposed within the protective cover; the controller is used to control the start and stop of the electromagnet.

[0010] Preferably, it further includes a third cover, a contact switch, and a second slide rod; the third cover is disposed on the upper surface of the top plate; the top plate has a fifth through hole communicating with the third cover; the central axis of the third cover is vertically arranged; the contact switch is disposed on the inner top wall of the third cover; the contact switch is communicatively connected to the controller; the second slide rod is vertically sealed and slidably inserted through the sealing plate; the bottom end of the second slide rod extends into the circular tube and is connected to the cylindrical float; the top end of the second slide rod moves through the fifth through hole and extends into the third cover; when the cylindrical float moves to the highest position, the top end of the second slide rod can abut against and trigger the contact switch.

[0011] Preferably, there are at least two fourth through holes; the two fourth through holes are symmetrical about the central axis of the plug.

[0012] Preferably, the end wall of the plug facing away from the first slide rod is provided with a second rubber layer; the second rubber layer is used to fit against the inner bottom wall of the groove.

[0013] Preferably, the length of the elongated hole is greater than the height of the cylindrical float; the extension direction of the elongated hole is parallel to the central axis of the circular tube.

[0014] This invention also proposes a testing method for a methanol fuel supply system, utilizing a digital testing platform for methanol fuel supply systems; the method includes: The oil pump is immersed in an external fuel tank, which contains methanol fuel. When the cylindrical float descends to its lowest position, the oil pump is started so that the air in the second pipe and the first pipe is discharged to the outside through the first cover. The air in the second pipe and the first pipe enters the first cover and then enters the cylindrical pipe through the elongated hole, then enters the second cavity through the first through hole, and then is discharged to the outside through the second through hole. Once the cylindrical float comes into contact with the lower surface of the sealing plate, continue to start the oil pump so that the methanol fuel in the external oil tank can enter the oil inlet of the test device for testing.

[0015] The above technical solution can achieve the following beneficial effects: The digital testing platform for the methanol fuel supply system proposed in this invention avoids the problem of air being trapped when methanol fuel enters the inlet of the testing platform. In use, the oil pump is directly started to draw methanol from the external tank into the second pipe, then into the first pipe, forcing the air in both the second and first pipes into the connecting pipe and into the first chamber. Subsequently, the methanol enters the second chamber through the elongated hole and the first through hole, and finally exits through the second through hole. During this process, as the air is expelled, the methanol fuel enters the first chamber, contacts the cylindrical float, and floats it. The cylindrical float then abuts against the lower surface of the sealing plate, sealing the first through hole, thus preventing methanol fuel from escaping from the first through hole. At this point, most of the air in the first and second pipes has been expelled. Afterwards, the methanol fuel can be pumped normally into the inlet of the testing device for testing the fuel supply system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the digital testing platform for the methanol fuel supply system proposed in this invention; Figure 2 for Figure 1 Enlarged view of details at point A in the middle; Figure 3 This is a partial structural schematic diagram of an embodiment of the digital testing platform for the methanol fuel supply system proposed in this invention; Figure 4 for Figure 3 Enlarged detail diagram at point B in the middle; Figure 5 for Figure 3 A magnified view showing the details of B in another state.

[0018] Explanation of reference numerals in the attached figures: 110. Testing device; 120. First pipe; 130. Second pipe; 140. Oil pump; 150. Connecting pipe; 160. First cover; 170. Top plate; 180. Sealing plate; 190. Circular tube; 210. First cavity; 220. Second cavity; 230. Cylindrical float; 240. Protrusion; 250. Long slotted hole; 260. Second slide rod; 270. First through hole; 280. Second through hole; 290. Fifth through hole; 310. Third cover; 320. Contact switch; 330. Second cover; 340. First slide rod; 350. Cuboid base; 360. Plug; 370. Protective cover; 380. Connecting plate; 390. Spring; 410. Electromagnet; 420. Groove; 430. Third through hole; 440. Fourth through hole. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] This invention proposes a digital testing platform and testing method for a methanol fuel supply system.

[0021] As attached Figure 1As shown, in one embodiment of the digital testing platform for a methanol fuel supply system proposed in this invention, the digital testing platform for the methanol fuel supply system includes a testing device 110, a first pipe 120, a second pipe 130, an oil pump 140, a first cover 160, a circular pipe 190, a sealing plate 180, and a cylindrical float 230; one end of the first pipe 120 is connected to the oil inlet of the testing device 110, and the first pipe 120 is horizontally arranged; the second pipe 130 is connected to the other end of the first pipe 120. An oil pump 140 is installed at the end of the second pipe 130 away from the first pipe 120, and the oil pump 140 is lower than the first pipe 120 (the oil pump 140 is used to immerse an external oil tank containing methanol fuel); a first cover 160 is connected to the first pipe 120 via a connecting pipe 150, and the first cover 160 is higher than the first pipe 120; the first cover 160 includes a horizontally arranged top plate 170; a sealing plate 180 is disposed inside the first cover 160, and the sealing plate 180 is parallel to the top plate 170; the sealing plate The first cover 160 is divided into a first cavity 210 and a second cavity 220 by partitioning the interior of the first cover 160 into a first cavity 210 and a second cavity 220; the second cavity 220 is located between the top plate 170 and the sealing plate 180; a circular tube 190 is connected to the side of the sealing plate 180 opposite to the top plate 170, and the central axis of the circular tube 190 is collinear with the central axis of the first cover 160; the central axis of the first cover 160 is vertically arranged; a first through hole 270 for connecting the first cavity 210 and the second cavity 220 is opened at the center of the sealing plate 180; a second through hole 280 is opened in the top plate 170. A cylindrical float 230 is vertically slidably embedded in a circular tube 190, and the cylindrical float 230 and the circular tube 190 share a central axis; a long slotted hole 250 is provided on the side wall of the circular tube 190, and the top of the long slotted hole 250 is close to the sealing plate 180; the upper surface of the cylindrical float 230 can fit against the lower surface of the sealing plate 180 to seal the first through hole 270; the inner wall of the circular tube 190 is provided with a protrusion 240 that can abut against the cylindrical float 230, and the protrusion 240 can prevent the cylindrical float 230 from detaching from the circular tube 190.

[0022] The digital testing platform for the methanol fuel supply system proposed in this invention can avoid the problem of air being mixed in when methanol fuel enters the inlet of the testing platform. In use, the oil pump 140 is directly started to draw methanol from the external fuel tank into the second pipe 130, and then into the first pipe 120. This forces the air in the second pipe 130 and the first pipe 120 into the connecting pipe 150, and then into the first chamber 210. Subsequently, it enters the second chamber 220 through the elongated hole 250 and the first through hole 270, and finally exits from the second through hole 280. During this process, as air is expelled, methanol fuel enters the first chamber 210 and floats upon contact with the cylindrical float 230. Eventually, the cylindrical float 230 comes into contact with the lower surface of the sealing plate 180 and seals the first through hole 270, thus preventing methanol fuel from escaping from the first through hole 270. At this time, most of the air in the first pipe 120 and the second pipe 130 has been expelled. Subsequently, methanol fuel can be pumped normally into the oil inlet of the test device 110 through the oil pump 140 to test the fuel supply system.

[0023] In addition, a first rubber layer (not shown) is provided on the upper surface of the cylindrical float 230; the first rubber layer is used to adhere to and abut against the lower surface of the sealing plate 180 to seal the first through hole 270 and improve the sealing performance.

[0024] Meanwhile, the digital testing platform of this methanol fuel supply system also includes a second cover 330 and a sealing assembly; the second cover 330 is installed on the upper surface of the top plate 170 and is connected to the second through hole 280; the central axis of the second cover 330 is vertically arranged; a cuboid seat 350 is embedded in the side wall of the second cover 330; one end of the cuboid seat 350 is inside the second cover 330, and the other end of the cuboid seat 350 is outside the second cover 330; a groove 420 is opened on the side wall of the cuboid seat 350 inside the second cover 330; a third through hole 430 communicating with the groove 420 is opened on the lower side wall of the cuboid seat 350 outside the second cover 330; the central axis of the third through hole 430 is vertically arranged and the third through hole 430 is below the groove 420; the sealing assembly is provided in the second cover 330 for sealing or opening the third through hole 430. The third through-hole 430 is sealed or opened by a sealing component, thereby venting air from the second pipe 130 and the first pipe 120.

[0025] Specifically, the aforementioned sealing assembly includes an electromagnet 410, a connecting plate 380, a first sliding rod 340, a plug 360, and a spring 390; the first sliding rod 340 is slidably and sealingly inserted through the side wall of the second cover 330; a protective cover 370 is provided on the outer side wall of the second cover 330; one end of the first sliding rod 340 extending out of the second cover 330 is located inside the protective cover 370; the other end of the first sliding rod 340 is connected to the plug 360; the first sliding rod 340 is horizontally arranged, and the first sliding rod 340 and the groove 420 share a common central axis; the plug 360 is horizontally slidably embedded in the groove 420; the plug 360 has a through hole 440; the central axis of the fourth through hole 440 is parallel to the central axis of the plug 360. Axis; Connecting plate 380 is vertically connected to one end of the first slide rod 340 located in the protective cover 370; one end of spring 390 is connected to the inner wall of the protective cover 370, and the other end of spring 390 is connected to connecting plate 380; the elastic force of spring 390 causes plug 360 to tend to abut against the inner bottom wall of groove 420; when plug 360 abuts against the inner bottom wall of groove 420, plug 360 seals the third through hole 430; electromagnet 410 is disposed on the inner wall of protective cover 370, and electromagnet 410 is used to attract connecting plate 380; when electromagnet 410 attracts connecting plate 380, plug 360 does not abut against the inner bottom wall of groove 420, and plug 360 does not seal the third through hole 430.

[0026] Meanwhile, the digital testing platform for this methanol fuel supply system also includes a controller (e.g., a microcontroller) installed inside the protective cover 370; the controller is used to control the start and stop of the electromagnet 410.

[0027] Under normal circumstances, the plug 360 abuts against the inner bottom wall of the groove 420 under the action of the spring 390, thereby sealing the third through hole 430 and isolating the first cover 160 from the outside. When it is necessary to discharge the air in the first pipe 120 and the second pipe 130 for testing, the controller controls the electromagnet 410 to be energized and start to attract the connecting plate 380. This causes the plug 360 to no longer abut against the inner bottom wall of the groove 420. At this time, the plug 360 does not seal the third through hole 430, that is, the air can be discharged to the outside through the passage of the fourth through hole 440 → groove 420 → third through hole 430.

[0028] In addition, the digital test platform of this methanol fuel supply system also includes a third cover 310, a contact switch 320, and a second slide rod 260; the third cover 310 is installed on the upper surface of the top plate 170; the top plate 170 has a fifth through hole 290 communicating with the third cover 310; the central axis of the third cover 310 is vertically set; the contact switch 320 is installed on the inner top wall of the third cover 310; the contact switch 320 is communicatively connected to the controller; the second slide rod 260 is vertically sealed and slidably inserted through the sealing plate 180; the bottom end of the second slide rod 260 extends into the round tube 190 and is connected to the cylindrical float 230; the top end of the second slide rod 260 moves through the fifth through hole 290 and extends into the third cover 310; when the cylindrical float 230 moves to the highest position, the top end of the second slide rod 260 can abut against and trigger the contact switch 320; when the contact switch 320 is triggered, the controller controls the electromagnet 410 to de-energize.

[0029] Specifically, when the cylindrical float 230 abuts against the lower surface of the sealing plate 180 (at this time, the air in the first pipe 120 and the second pipe 130 has been discharged), the second slide rod 260 abuts against and triggers the contact switch 320. At this time, the controller controls the electromagnet 410 to de-energize, and the plug 360 returns to the state of abutting against the inner bottom wall of the groove 420 under the action of the spring 390. That is, the third through hole 430 is sealed, thereby achieving sealing and isolation to prevent external impurities from entering the second cover 330.

[0030] Furthermore, the number of the aforementioned fourth through holes 440 is at least two (two in this embodiment); and the two fourth through holes 440 are symmetrical about the central axis of the plug 360. A second rubber layer (not shown) is provided on the end wall of the plug 360 opposite to the first slide rod 340; the second rubber layer is used to fit against the inner bottom wall of the groove 420 to improve the sealing effect. The length of the elongated hole 250 is greater than the height of the cylindrical float 230; the extension direction of the elongated hole 250 is parallel to the central axis of the circular tube 190. The number of elongated holes 250 is two; the two elongated holes 250 are symmetrical about the central axis of the circular tube 190.

[0031] This invention also proposes a testing method for a methanol fuel supply system, which utilizes a digital testing platform for methanol fuel supply systems; the method includes the following steps: Step S110: Immerse the oil pump 140 into an external oil tank, which contains methanol fuel.

[0032] Step S120: When the cylindrical float 230 descends to the lowest position, start the oil pump 140 so that the air in the second pipe 130 and the first pipe 120 is discharged to the outside through the first cover 160. The air in the second pipe 130 and the first pipe 120 enters the first cover 160 and then enters the round pipe 190 through the elongated hole 250, then enters the second cavity 220 through the first through hole 270, and then is discharged to the outside through the second through hole 280.

[0033] Step S130: When the cylindrical float 230 comes into contact with the lower surface of the sealing plate 180, continue to start the oil pump 140 so that the methanol fuel in the external oil tank enters the oil inlet of the test device 110 for testing.

[0034] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0035] This invention is particularly applicable to methanol fuel supply systems for boats. Through the above description of the embodiments, those skilled in the art can clearly understand that the methods described in the embodiments can be implemented using software plus necessary general-purpose hardware platforms. Of course, they can also be implemented using hardware, but in many cases, the former is a better implementation method. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this invention.

[0036] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A digital testing platform for a methanol fuel supply system, characterized in that, The device includes a testing apparatus, a first pipe, a second pipe, an oil pump, a first cover, a circular tube, a sealing plate, and a cylindrical float. One end of the first pipe is connected to the oil inlet of the testing apparatus and is horizontally positioned. The second pipe is connected to the other end of the first pipe. The oil pump is located at the end of the second pipe furthest from the first pipe and is positioned below the first pipe. The first cover is connected to the first pipe via a connecting pipe and is higher than the first pipe. The first cover includes a horizontally positioned top plate. The sealing plate is located inside the first cover and is parallel to the top plate. The sealing plate isolates the interior of the first cover into a first cavity and a second cavity. The second cavity is located between the top plate and the sealing plate. The circular tube is connected to the side of the sealing plate opposite to the top plate, and the central axis of the circular tube is collinear with the central axis of the first cover. A first through hole for connecting the first cavity and the second cavity is provided at the center of the sealing plate. A second through hole is provided in the top plate. The cylindrical float is vertically slidably embedded in the circular tube, and the cylindrical float and the circular tube share the same central axis. An elongated hole is provided on the side wall of the circular tube, and the top of the elongated hole is close to the sealing plate. The upper surface of the cylindrical float can fit against the lower surface of the sealing plate to seal the first through hole. The inner wall of the circular tube is provided with a protrusion that can abut against the cylindrical float.

2. The digital testing platform for a methanol fuel supply system according to claim 1, characterized in that, The upper surface of the cylindrical float is provided with a first rubber layer; the first rubber layer is used to adhere to and abut against the lower surface of the sealing plate to seal the first through hole.

3. The digital testing platform for a methanol fuel supply system according to claim 1, characterized in that, It also includes a second cover and a sealing assembly; the second cover is disposed on the upper surface of the top plate and communicates with the second through hole; the central axis of the second cover is vertically arranged; a cuboid seat is embedded in the side wall of the second cover; one end of the cuboid seat is inside the second cover and the other end of the cuboid seat is outside the second cover; a groove is formed on the side wall of the cuboid seat inside the second cover; a third through hole communicating with the groove is formed on the lower side wall of the cuboid seat outside the second cover; the central axis of the third through hole is vertically arranged and the third through hole is below the groove; the sealing assembly is disposed in the second cover for sealing or opening the third through hole.

4. The digital testing platform for a methanol fuel supply system according to claim 3, characterized in that, The sealing assembly includes an electromagnet, a connecting plate, a first sliding rod, a plug, and a spring; the first sliding rod is slidably and sealingly inserted through the side wall of the second cover; a protective cover is provided on the outer side wall of the second cover; one end of the first sliding rod extending out of the second cover is located inside the protective cover; the other end of the first sliding rod is connected to the plug; the first sliding rod is horizontally arranged, and the first sliding rod and the groove share a common central axis; the plug is horizontally slidably embedded in the groove; the plug has a fourth through hole; the central axis of the fourth through hole is parallel to the central axis of the plug; the connecting plate A spring is vertically connected to one end of the first slide rod located on the protective cover; one end of the spring is connected to the inner wall of the protective cover, and the other end of the spring is connected to the connecting plate; the spring force causes the plug to tend to abut against the inner bottom wall of the groove; when the plug abuts against the inner bottom wall of the groove, the plug seals the third through hole; an electromagnet is disposed on the inner wall of the protective cover, and the electromagnet is used to attract the connecting plate; when the electromagnet attracts the connecting plate, the plug does not abut against the inner bottom wall of the groove, and the plug does not seal the third through hole.

5. The digital testing platform for a methanol fuel supply system according to claim 4, characterized in that, It also includes a controller disposed within the protective cover; the controller is used to control the start and stop of the electromagnet.

6. The digital testing platform for a methanol fuel supply system according to claim 5, characterized in that, It also includes a third cover, a contact switch, and a second slide rod; the third cover is disposed on the upper surface of the top plate; the top plate has a fifth through hole communicating with the third cover; the central axis of the third cover is vertically arranged; the contact switch is disposed on the inner top wall of the third cover; the contact switch is communicatively connected to the controller; the second slide rod is vertically sealed and slidably inserted through the sealing plate; the bottom end of the second slide rod extends into the circular tube and is connected to the cylindrical float; the top end of the second slide rod moves through the fifth through hole and extends into the third cover; when the cylindrical float moves to the highest position, the top end of the second slide rod can abut against and trigger the contact switch.

7. The digital testing platform for a methanol fuel supply system according to claim 4, characterized in that, The number of the fourth through holes is at least two; the two fourth through holes are symmetrical about the central axis of the plug.

8. The digital testing platform for a methanol fuel supply system according to claim 4, characterized in that, A second rubber layer is provided on the end wall of the plug opposite to the first slide rod; the second rubber layer is used to fit against the inner bottom wall of the groove.

9. The digital testing platform for a methanol fuel supply system according to claim 1, characterized in that, The length of the elongated hole is greater than the height of the cylindrical float; the extension direction of the elongated hole is parallel to the central axis of the circular tube.

10. A test method for a methanol fuel supply system, characterized in that, A digital testing platform for a methanol fuel supply system as described in any one of claims 1-9; the method includes: The oil pump is immersed in an external fuel tank, which contains methanol fuel. When the cylindrical float descends to its lowest position, the oil pump is started so that the air in the second pipe and the first pipe is discharged to the outside through the first cover. The air in the second pipe and the first pipe enters the first cover and then enters the cylindrical pipe through the elongated hole, then enters the second cavity through the first through hole, and then is discharged to the outside through the second through hole. Once the cylindrical float comes into contact with the lower surface of the sealing plate, continue to start the oil pump so that the methanol fuel in the external oil tank can enter the oil inlet of the test device for testing.

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