Conveying pump assembly of methanol oil tank and methanol oil tank

Abstract

The conveying pump assembly comprises an oil tank cover plate, the oil tank cover plate is inserted and installed at a port of an oil tank body, an oil pump communicated with the oil tank body is arranged on the bottom face of the oil tank cover plate, and an oil inlet branch pipe extending to the bottom of the oil tank body is arranged at the bottom end of the oil pump. A plug-in connector and an oil outlet pipe penetrating through the oil tank cover plate are respectively arranged at the top end of the oil pump; the oil level detection assembly is installed on the bottom face of the oil tank cover plate and used for detecting the oil level change in the oil tank body; the oil supply pipe is installed on the oil tank cover plate, one end of the oil supply pipe is communicated with the oil tank body, the other end of the oil supply pipe is communicated with an external oil supply system, the oil pump of the delivery pump assembly can penetrate into the oil tank body to deliver methanol fuel, the oil pump, the oil level detection assembly, the oil supply pipe and the oil outlet pipe are integrated on the oil tank cover plate, and the oil tank cover plate is installed on the oil tank body in an inserted mode. Permeation and volatilization of methanol fuel at the pipeline joint can be reduced, and the oil pumping pipeline is prevented from being corroded.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of methanol tank pumps, in particular to a methanol tank delivery pump assembly and a methanol tank. BACKGROUND

[0002] In the field of methanol fuel applications, with the wide use of methanol as clean energy in the transportation industry, the methanol tank pump system as an important part of methanol fuel delivery and supply, its technical development is of great significance to ensure the effective use of methanol fuel and the stable operation of equipment, and a reasonable and efficient methanol tank pump system can improve the delivery efficiency of methanol fuel, reduce energy loss and promote the more widespread application of methanol fuel in various fields.

[0003] At present, for the methanol tank pump system, the pump body pipeline of the methanol tank pump in the prior art is mostly on the outside of the tank, and in some large columnar tanks of trucks and trailers, the methanol tank pump is placed on the outer wall of the large columnar tank and fixed through an additional metal frame, but methanol fuel has low viscosity, high permeability and strong corrosiveness, so in the traditional pump oil system, methanol fuel is easy to permeate and volatilize from the pipeline connection and corrode the pump oil pipeline, causing fuel loss and environmental pollution, ultimately leading to the reduction of the delivery efficiency of methanol fuel in the pump oil system and increasing the safety hazard.

[0004] And in the prior art, in order to prevent methanol fuel from permeating and volatilizing and leaking, a complex oil return hole is processed on the oil pump system and a multi-layer sealing structure is used to enhance the sealing performance, but these solutions also bring many problems, the processing of the complex oil return hole and the multi-layer sealing structure greatly increase the assembly difficulty of the methanol tank pump, and may cause faults due to the cutting of the sealing ring, reducing the assembly efficiency and existing safety hazards. SUMMARY

[0005] In order to avoid the permeation and volatilization of methanol fuel when the methanol tank pump supplies oil to the vehicle, a methanol tank delivery pump assembly and a methanol tank are provided.

[0006] The above application purpose of the application is realized through the following technical scheme: A methanol tank delivery pump assembly, comprising a tank cover plate inserted and installed at a port of a tank body, a bottom surface of the tank cover plate being provided with an oil pump communicating with the tank body, a bottom end of the oil pump being provided with an oil inlet branch pipe extending to a bottom of the tank body, and a top end of the oil pump being respectively provided with a plug-in connector and an oil outlet pipe penetrating through the tank cover plate; An oil level detection assembly installed on the bottom surface of the tank cover plate and used for detecting the change of the oil level in the tank body; The oil supply pipe is installed on the oil tank cover plate, one end of which is connected with the oil tank body and the other end is connected with the external oil supply system.

[0007] By adopting the above technical scheme, the integration design of the oil pump assembly and the oil tank cover plate is realized, the end of the oil inlet branch pipe of the oil pump is located at the bottom of the oil tank body, the risk of air cavity in the oil tank body entering the oil pump is reduced, and by integrating the oil level detection assembly, the oil supply pipe and the oil outlet pipe on the oil tank cover plate, the connection nodes of the traditional external pipeline are reduced, thereby effectively solving the leakage and volatilization problem of methanol fuel at the pipeline connection, greatly improving the transportation efficiency of methanol fuel, reducing energy loss caused by leakage and corrosion, reducing volatile organic emissions and safety hazards caused by fuel leakage, and finally realizing efficient, safe and environmentally friendly operation of the fuel transportation system.

[0008] Preferably, the oil pump outer wall is provided with a circuit control module and an oil supply branch pipe connected to the oil supply pipe, the oil supply branch pipe, the oil outlet pipe and the oil inlet branch pipe are all provided with solenoid valves at the connection positions with the oil pump, the circuit control module controls the conduction state of the oil inlet end and the oil outlet end of the oil pump through the coil current direction of the solenoid valve, and the solenoid valve switches the oil pump to the oil pumping mode or the oil pumping mode.

[0009] By adopting the above technical scheme, the coil current direction of the solenoid valve is dynamically adjusted by the circuit control module, the conduction state of the oil inlet end and the oil outlet end of the oil pump is accurately switched, the oil pump can be flexibly converted between the oil pumping mode and the oil pumping mode, and specifically, in the oil pumping mode, the oil supply branch pipe serves as the oil inlet end and the oil inlet branch pipe serves as the oil outlet end, and the external methanol fuel can be pumped into the oil tank body; in the oil pumping mode, the oil inlet branch pipe serves as the oil inlet end and the oil outlet pipe serves as the oil outlet end, and the methanol fuel in the oil tank body can be actively pumped to the external circuit, the function of the oil pump is reconstructed through the current direction control, the problem that the traditional fixed mode oil pump cannot adapt to complex working conditions is effectively solved, and the environmental adaptability and functional flexibility of the delivery pump assembly are significantly improved.

[0010] Preferably, the oil level detection assembly comprises a sliding rod fixed to the bottom surface of the oil tank cover plate, two detection pieces are arranged at the two ends of the sliding rod respectively, a float is arranged on the outer wall of the sliding rod, and the two detection pieces are electrically connected with the circuit control module.

[0011] By adopting the technical scheme, the float in the oil level detection assembly slides up and down along the sliding rod axis with the change of the methanol fuel oil level in the tank body, the two end detection pieces correspond to the high and low oil level states respectively, and are electrically connected with the circuit control module, when the oil level rises to the high position, the float pushes the upper end detection piece to send a signal, triggering the circuit control module to cut off the oil pumping mode, preventing the methanol fuel from overflowing in the tank body, when the oil level drops to the low position, the float moves down to trigger the lower end detection piece, and the circuit control module stops the oil pumping mode immediately, avoiding dry pumping, the mechanical oil level detection and the electric control module are cooperatively designed, realizing the automatic switching of the oil pump working mode, effectively solving the problems of energy waste and safety hidden trouble caused by the response lag of the traditional liquid level control, oil overflow or dry pumping, and improving the real-time monitoring precision and operation stability of the methanol fuel delivery system.

[0012] Preferably, the top surface of the tank cover plate is provided with a sealing step located on the outer wall of the oil outlet pipe, and a fluorosilicone rubber sealing ring is arranged between the oil outlet pipe and the sealing step.

[0013] By adopting the technical scheme, the fluorosilicone rubber sealing ring is arranged on the outer wall of the oil outlet pipe and cooperates with the sealing step of the tank cover plate, which significantly improves the dynamic sealing performance of the oil outlet pipe, effectively prevents the leakage and volatilization of methanol fuel and the corrosion and erosion of surrounding components, and avoids fuel loss and environmental pollution caused by sealing failure.

[0014] Preferably, the top surface of the tank cover plate is further provided with an oil return pipe communicating with the tank body, and the oil return pipe is connected with the external oil line.

[0015] By adopting the technical scheme, the oil return pipe is arranged to communicate the tank body with the external oil line, realizing the bidirectional flow of methanol fuel between the delivery pump assembly and the external system, dynamically balancing the pressure difference between the inside and outside of the tank body, avoiding the risk of oil supply interruption or fuel accumulation caused by air pressure fluctuation, optimizing the utilization rate of methanol fuel, reducing the energy loss caused by stagnation or leakage, and reducing the explosion or corrosion risk caused by local accumulation of methanol vapor, thereby improving the safety and operation stability of the delivery system.

[0016] Preferably, the top surface of the tank cover plate is further provided with an exhaust pipe communicating with the tank body, and an exhaust valve is arranged at the opening of the exhaust pipe.

[0017] By adopting the technical scheme, the exhaust pipe is arranged to communicate the tank body with the external environment and the exhaust valve is arranged, realizing the dynamic balance and adjustment of the air pressure inside and outside the tank body, effectively maintaining the stability of the air pressure in the tank body through controllable gas discharge strategy, reducing the volatilization loss of methanol vapor and the decrease of delivery efficiency caused by pressure fluctuation, thereby ensuring the continuity and safety of methanol fuel delivery.

[0018] Preferably, the bottom surface of the oil tank cover plate is provided with a positioning member, the inner wall of the port is fixed with a limiting ring, the upper surface of the limiting ring is provided with a ring groove for embedding the end of the positioning member, and the side of the ring groove close to the axis is provided with a guide slope with an arc-shaped cross section, and the outer side wall of the positioning member is provided with a guide convex rib matched with the guide slope.

[0019] By adopting the above technical scheme, through the matching structure of the positioning member and the limiting ring, combined with the matching design of the guide slope and the guide convex rib, the oil tank cover plate is quickly aligned and disassembled at the port of the oil tank body, and the installation convenience and assembly efficiency of the delivery pump assembly are significantly improved. In addition, the integrated installation design places the delivery pump assembly main body in the oil tank body, which not only reduces the complexity of external pipeline layout, but also optimizes the maintenance and repair process through the modular structure.

[0020] Preferably, the bottom surface of the oil tank cover plate is provided with a support extending to the bottom of the oil tank body, and the bottom end of the support is respectively provided with an electric heating belt, a phase change energy storage module and a temperature sensor connected with each other.

[0021] By adopting the above technical scheme, through the cooperative design of the integrated phase change energy storage module, the electric heating belt and the temperature sensor, the latent heat characteristics of the phase change material are used to realize the constant temperature regulation of the methanol fuel. When the ambient temperature rises and the saturated vapor pressure of the methanol fuel rises significantly, the phase change energy storage module stores the excess heat by absorbing heat, thereby inhibiting the excessive gasification of the fuel. When the temperature decreases, the heat release function of the phase change energy storage module maintains the flowability of the fuel in the low-temperature section of the oil tank body. The dynamic heat balance mechanism effectively solves the problem of out-of-control gas-liquid phase change of methanol fuel caused by temperature fluctuation, avoids the leakage risk and explosion hazard caused by high-temperature gasification, and reduces the supply interruption caused by low-temperature solidification.

[0022] Preferably, the oil pump comprises a pump body at the top end and a brushless motor at the bottom end, and the output end of the brushless motor is drivingly connected with the rotating part of the pump body.

[0023] By adopting the above technical scheme, unlike the traditional brush motor, the brushless motor can realize dynamic adjustment of the rotating speed through the circuit control module, and accurately match the oil delivery demand under different working conditions: in high flow demand, the pumping efficiency is improved, and in low load working condition, the rotating speed is reduced to reduce the overflow loss and heat waste, thereby improving the energy efficiency ratio and working condition adaptability of the delivery pump assembly.

[0024] A methanol oil tank comprises an oil tank body and the delivery pump assembly of the methanol oil tank.

[0025] By adopting the above technical scheme, the methanol oil tank delivery pump assembly is combined with the oil tank body, which can improve the delivery efficiency of methanol fuel, reduce energy loss, avoid fuel penetration and evaporation from the pipeline connection, and facilitate the wider application of methanol fuel in various fields.

[0026] In summary, the present application has at least the following advantages: 1. The oil pump of the delivery pump assembly can deliver methanol fuel into the interior of the tank body, and the oil pump, oil level detection assembly, oil supply pipe and oil outlet pipe are integrated on the tank cover plate, which is inserted and installed on the tank body, thereby reducing the penetration and evaporation of methanol fuel at the pipe connection, and avoiding corrosion of the oil pump pipe; 2. The circuit control module switches the current direction of the electromagnetic valve coil to realize flexible conversion of the oil pump between the oil pumping mode and the oil pumping mode, thereby improving the environmental adaptability and functional flexibility of the delivery pump assembly; 3. By adopting the embedded structure of the positioning member and the limiting ring, and combining the cooperative design of the guide slope surface and the guide convex rib, the tank cover plate is quickly aligned and disassembled at the port of the tank body, thereby improving the installation convenience and assembly efficiency of the delivery pump assembly. BRIEF DESCRIPTION OF DRAWINGS Figure 1 is an exploded view of the methanol tank delivery pump assembly and the tank body; Figure 2 is Figure 1 a local enlarged view at A; Figure 3 is a sectional view between the oil pump and the tank cover plate; Figure 4 is a structural schematic view between the oil pump and the tank cover plate; Figure 5 is an exploded schematic view of the oil return pipe on the tank cover plate; Figure 6 is a structural schematic view between the oil pump, the hydraulic sensing assembly and the tank cover plate; Figure 7 is an exploded view between the tank cover plate and the tank body Figure 1 ; Figure 8 is an exploded view between the tank cover plate and the tank body Figure 2 .

[0027] Reference signs: 1, tank body; 11, port; 12, limiting ring; 121, ring groove; 122, guide slope surface; 2, tank cover plate; 21, oil supply pipe; 22, sealing step; 23, fluorosilicone rubber sealing ring; 24, oil return pipe; 25, exhaust pipe; 251, exhaust valve; 26, positioning member; 261, guide convex rib; 3, oil pump; 31, pump body; 32, brushless motor; 33, oil outlet pipe; 34, plug-in connector; 35, oil inlet branch pipe; 36, oil supply branch pipe; 37, electromagnetic valve; 38, circuit control module; 4, oil level detection assembly; 41, sliding rod; 42, detection member; 43, float; 5, bracket; 51, electric heating belt; 52, phase change energy storage module; 53, temperature sensor. DETAILED DESCRIPTION Further details are described below in conjunction with the accompanying drawings: Embodiment One As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel. Figure 1 As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel.

[0028] Figure 2 As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel. Figure 3 As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel.

[0029] As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel.

[0030] As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel.

[0031] Figure 2 As shown in the accompanying drawings, a methanol tank delivery pump assembly includes a tank cover plate 2, the tank cover plate 2 is in the shape of a round plate, the tank cover plate 2 is inserted and installed at the port 11 of the tank body 1, the tank body 1 is made of corrosion-resistant metal material, and the inside is hollow for storing methanol fuel. Figure 4

[0032] ​​​The side wall of the oil pump 3 is further provided with a circuit control module 38 connected to the internal circuit of the oil pump 3, and the circuit control module 38 is electrically connected with the electromagnetic valve 37 respectively. The circuit control module 38 is used for controlling the opening and closing of the electromagnetic valve 37. The circuit control module 38 controls the conduction state of the oil inlet end and the oil outlet end of the oil pump 3 through the current direction of the coil of the electromagnetic valve 37, so that the electromagnetic valve 37 switches the oil pump 3 to the oil pumping mode or the oil pumping mode. In the oil pumping mode, the oil supply branch pipe 36 serves as the oil inlet end, and the oil inlet branch pipe 35 serves as the oil outlet end. External methanol fuel can be pumped into the oil tank body 1; in the oil pumping mode, the oil inlet branch pipe 35 is converted into the oil inlet end, and the oil outlet pipe 33 serves as the oil outlet end. Methanol fuel can be actively pumped to the external pipeline. The current direction of the coil is used to switch different working modes of the oil pump 3, so that the oil pump 3 can adapt to complex working conditions.

[0033] As shown in the accompanying drawings Figure 5 The top surface of the oil tank cover plate 2 is provided with a sealing step 22. The sealing step 22 is annular, and the sealing step 22 is sleeved on the outer wall of the oil outlet pipe 33. A fluorosilicone rubber sealing ring 23 is arranged between the oil outlet pipe 33 and the sealing step 22. The fluorosilicone rubber sealing ring 23 is a high-performance sealing element, which combines the chemical resistance of fluorine rubber and the temperature resistance of silicone rubber. The fluorosilicone rubber sealing ring 23 has strong corrosion resistance to methanol fuel. At the same time, the fluorosilicone rubber sealing ring 23 is in interference fit with the sealing step 22, forming a dynamic sealing structure. When the oil pump 3 pumps methanol fuel into the external pipeline through the oil outlet pipe 33, the risk of methanol fuel leakage from the connection is effectively blocked.

[0034] As shown in the accompanying drawings Figure 2 and the accompanying drawings Figure 6 The top surface of the oil tank cover plate 2 is further provided with a return oil pipe 24 communicated with the oil tank body 1, and the return oil pipe 24 is communicated with the external oil pipeline. The bidirectional flow between the delivery pump assembly and the external system is realized, the dynamic balance of the pressure difference between the inside and outside of the oil tank body 1 is achieved, and the risk of fuel accumulation or interruption of fuel supply caused by pressure fluctuation is avoided.

[0035] The top surface of the oil tank cover plate 2 is further provided with a return oil pipe 24 communicated with the oil tank body 1, and the return oil pipe 24 is communicated with the external oil pipeline. The bidirectional flow between the delivery pump assembly and the external system is realized, the dynamic balance of the pressure difference between the inside and outside of the oil tank body 1 is achieved, and the risk of fuel accumulation or interruption of fuel supply caused by pressure fluctuation is avoided.

[0036] The bottom surface of the oil tank cover plate 2 is respectively provided with an oil level detection assembly 4, a positioning piece 26 and a bracket 5.

[0037] The oil level detection assembly 4 includes a sliding rod 41 fixed to the bottom surface of the fuel tank cover 2. The sliding rod 41 is arranged vertically along the height direction of the fuel tank body 1. Two detection parts 42 are respectively provided at both ends of the sliding rod 41. The two detection parts 42 are respectively a high detection position and a low detection position, and the two detection parts 42 are electrically connected to the circuit control module 38. A float 43 that can slide up and down is provided on the outer wall of the sliding rod 41. The float 43 is sleeved on the outer wall of the sliding rod 41 and slides up and down along the axis as the oil level changes. When the oil level rises to a high position, the float 43 pushes the detection part 42 at the upper end to trigger a signal, and the circuit control module 38 cuts off the oil pumping mode to prevent methanol fuel from overflowing in the fuel tank body 1; when the oil level drops to a low position, the float 43 triggers the detection part 42 at the lower end to terminate the oil pumping mode to avoid idling and dry pumping. The coordinated design of the mechanical oil level detection and the electronic control module realizes the automatic switching of the working mode of the oil pump 3.

[0038] The bracket 5 extends vertically downward to the bottom of the fuel tank body 1. The end of the bracket 5 is integrated with an electric heating belt 51, a phase change energy storage module 52 and a temperature sensor 53. The electric heating belt 51 is wound in the annular groove on the inner wall of the bracket 5 and is in direct contact with the methanol fuel. The motor heat belt adopts a PTC ceramic heating element with a self-limiting temperature characteristic. When current passes through, the resistance increases with the temperature, automatically limiting the power output to avoid overheating; the phase change energy storage module 52 adopts paraffin-based organic phase change material (PCM), and the phase change temperature is set to 25-35°C (matching The PCM has a phase change latent heat value of ≥200 kJ / kg, ensuring that the temperature fluctuation can be adjusted by ±5°C in a single endothermic / exothermic cycle. It is encapsulated in a high-thermal-conductivity graphite composite shell and arranged adjacent to the electric heating belt 51. When the ambient temperature rises, causing the methanol vapor pressure to rise, the PCM absorbs excess heat to complete the solid-liquid phase transition and inhibit the gasification of the methanol fuel. In low-temperature environments, the PCM releases the stored heat to maintain the fluidity of methanol in the low-temperature range. The temperature sensor 53 is located at the center of the bottom end of the bracket 5, directly contacting the methanol liquid, and monitoring the fuel temperature in real time.

[0039] By integrating the phase change energy storage module 52 with the electric heating belt 51 and the temperature sensor 53 in a coordinated design, the latent heat characteristics of the phase change material are utilized to achieve constant temperature control of the methanol fuel. When the ambient temperature rises, causing the saturated vapor pressure of methanol to rise significantly, the phase change energy storage module 52 stores excess heat by absorbing heat, thereby suppressing excessive gasification of the fuel. When the temperature drops, its heat release function maintains the fluidity of the fuel in the low-temperature section of the fuel tank body 1. This dynamic thermal balance mechanism effectively solves the problem of uncontrolled gas-liquid phase change of methanol caused by temperature fluctuations.

[0040] As attached Figure 7 and attached Figure 8As shown, the positioning member 26 is in the shape of an arc piece, and the number of the positioning member 26 is four, and the four positioning members 26 are respectively located at the outer periphery of the oil tank cover plate 2, the end of the positioning member 26 is in the shape of a cone, and the end of the positioning member 26 is provided with a guide convex rib 261 close to the axis of the oil tank cover plate 2.

[0041] The inner wall of the port 11 of the oil tank body 1 is fixed with a limiting ring 12, the upper surface of the limiting ring 12 is provided with a ring groove 121 for embedding the end of the positioning member 26, the cross section of the ring groove 121 is V-shaped, which is convenient for closely matching the cone-shaped end of the positioning member 26, and the geometric shape of the interference fit characteristics effectively fills the micro gap existing in the traditional structure of the plane contact.

[0042] The ring groove 121 is provided with a guide slope surface 122 in the shape of an arc cross section close to the axis, and the depth between the guide slope surface 122 and the ring groove 121 gradually becomes shallow, the guide convex rib 261 slides in the guide slope surface 122, and as the guide convex rib 261 rotates along the radial direction of the ring groove 121, the guide convex rib 261 and the guide slope surface 122 will gradually clamp the oil tank cover plate 2, and the cooperation design of the guide slope surface 122 and the guide convex rib 261 makes the delivery pump assembly more convenient to maintain and overhaul, realizes the quick disassembly and alignment of the oil tank cover plate 2 at the port 11 of the oil tank body 1, and significantly improves the installation convenience and assembly efficiency of the delivery pump assembly.

[0043] Embodiment two A kind of methanol oil tank, including oil tank body and the delivery pump assembly of methanol oil tank, the delivery pump assembly of methanol oil tank is combined with oil tank body, can improve the delivery efficiency of methanol fuel, reduce energy loss, avoid fuel from pipeline connection place to penetrate and volatilize, benefit methanol fuel more widely applied in various fields.

[0044] Working principle The oil pump 3 is in the oil pumping mode, the external oil supply system injects methanol fuel into the oil tank body 1 through the oil supply pipe 21, the circuit control module 38 controls the electromagnetic valve 37 between the oil supply branch pipe 36 and the oil pump 3, so that the oil supply branch pipe 36 is in the on state, the oil pump 3 pressurizes the methanol fuel into the oil tank body 1 through the oil inlet branch pipe 35, and the electromagnetic valve 37 on the oil outlet pipe 33 is in the closed state, the float 43 slides upward along the sliding rod 41 as the oil level of the methanol fuel rises, and after the float 43 pushes the upper end detection member 42, the upper end detection member 42 triggers the circuit control module 38 to cut off the oil pumping mode, to prevent the methanol fuel from overflowing in the oil tank body 1; When the oil pump 3 is in the oil pumping mode, the oil pump 3 is reversed, the oil inlet branch pipe 35 is turned into an oil inlet end, the oil outlet pipe 33 is turned into an oil outlet end, the circuit control module 38 controls the electromagnetic valves 37 on the oil inlet branch pipe 35 and the oil outlet pipe 33 to be opened, the electromagnetic valve 37 on the oil supply branch pipe 36 is closed, and the oil pump 3 pumps the methanol fuel in the tank body 1 to the external pipeline. The float 43 slides downward along the sliding rod 41 as the methanol fuel level decreases. After the lower detection piece 42 is pushed by the float 43, the lower detection piece 42 triggers the circuit control module 38 to cut off the oil pumping mode, so as to avoid dry pumping.

[0045] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments according to the needs after reading the specification, and the modifications are not creative contributions, but are protected by the patent law as long as they are within the scope of the present application.

Claims

1. A delivery pump assembly for a methanol fuel tank, characterized in that: The invention comprises a fuel tank cover plate (2) which is inserted into and mounted on a port (11) of a fuel tank body (1); a fuel pump (3) which is connected to the fuel tank body (1) is provided on the bottom surface of the fuel tank cover plate (2); a fuel inlet branch pipe (35) which extends to the bottom of the fuel tank body (1) is provided at the bottom end of the fuel pump (3); and a connector (34) and a fuel outlet pipe (33) which respectively pass through the fuel tank cover plate (2). An oil level detection assembly (4) is mounted on the bottom surface of the oil tank cover (2) and is used to detect changes in the oil level in the oil tank body (1); The oil supply pipe (21) is mounted on the oil tank cover (2), one end of which is connected to the oil tank body (1) and the other end of which is connected to the external oil supply system.

2. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: A circuit control module (38) and an oil supply branch pipe (36) connected to the oil supply pipe (21) are provided on the outer wall of the oil pump (3). A solenoid valve (37) is provided at each of the oil supply branch pipe (36), the oil outlet pipe (33) and the oil inlet branch pipe (35) where they are connected to the oil pump (3). The circuit control module (38) controls the conduction state of the oil inlet end and the oil outlet end of the oil pump (3) through the direction of the coil current of the solenoid valve (37). The solenoid valve (37) switches the oil pump (3) to an oil extraction mode or an oil pumping mode.

3. The methanol fuel tank delivery pump assembly according to claim 2, characterized in that: The oil level detection assembly (4) comprises a sliding rod (41) fixed to the bottom surface of the oil tank cover (2), detection members (42) are respectively provided at both ends of the sliding rod (41), and a float (43) is provided on the outer wall of the sliding rod (41), and both detection members (42) are electrically connected to the circuit control module (38).

4. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: The top surface of the oil tank cover plate (2) is provided with a sealing step (22) located on the outer wall of the oil outlet pipe (33), and a fluorosilicone rubber sealing ring (23) is provided between the oil outlet pipe (33) and the sealing step (22).

5. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: The top surface of the oil tank cover plate (2) is also provided with an oil return pipe (24) connected to the oil tank body (1), and the oil return pipe (24) is connected to an external oil pipeline.

6. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: The top surface of the fuel tank cover plate (2) is further provided with an exhaust pipe (25) connected to the fuel tank body (1), and an exhaust valve (251) is provided at the opening of the exhaust pipe (25).

7. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: A positioning member (26) is provided on the bottom surface of the fuel tank cover (2), a limiting ring (12) is fixed on the inner wall of the port (11), an annular groove (121) is provided on the upper surface of the limiting ring (12) for the end of the positioning member (26) to be embedded, a guide slope (122) with an arc-shaped cross section is provided on the side of the annular groove (121) close to the axis, and a guide ridge (261) is provided on the outer side wall of the positioning member (26) to cooperate with the guide slope (122).

8. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: A bracket (5) extending to the bottom of the fuel tank body (1) is provided on the bottom surface of the fuel tank cover (2), and the bottom end of the bracket (5) is provided with an electric heating belt (51), a phase change energy storage module (52), and a temperature sensor (53) connected to each other.

9. The methanol fuel tank delivery pump assembly according to claim 1, characterized in that: The oil pump (3) comprises a pump body (31) at the top end and a brushless motor (32) at the bottom end, wherein the output end of the brushless motor (32) is drivingly connected to a rotating component of the pump body (31).

10. A methanol fuel tank, characterized in that: A methanol fuel tank delivery pump assembly comprising a fuel tank body (1) and the fuel tank according to any one of claims 1 to 9.

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