Fuel pump with auxiliary pump and oil suction function

Abstract

A fuel pump with an auxiliary pump and an oil suction function comprises an oil storage barrel and an upper cover, a pump core, a filter and an injection assembly are arranged in the oil storage barrel, an injection connecting pipe is arranged on the outer wall of the filter, the injection assembly is communicated with the injection connecting pipe, the injection assembly comprises an injection inlet pipe, the upper end of the injection inlet pipe is inserted into the injection connecting pipe of the filter, and the lower end of the injection inlet pipe is connected with the upper cover. A first injection cavity is formed in the lower end of the injection inlet pipe, a first oil return pipe communicated with an inner cavity of the oil storage barrel is arranged on the outlet side of the first injection cavity, and an inlet pipe used for being connected with an auxiliary oil tank oil pump is arranged on the first oil return pipe. The device has the advantages of being simple in structure, reasonable in design, convenient to assemble, capable of efficiently sucking residual fuel oil in the auxiliary fuel tank and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuel pump, in particular to a fuel pump with oil suction function of auxiliary pump. BACKGROUND

[0002] In the fuel automobile or the engineering machinery needing to use the auxiliary fuel tank, the fuel pump in the main fuel tank usually cannot effectively extract the residual fuel in the auxiliary fuel tank, leads to low fuel utilization, causes waste. Therefore, need a kind of new fuel pump that can efficiently suck auxiliary fuel tank fuel, compact structure and it is easy to maintain. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of fuel pumps with oil suction function of auxiliary pump, which solve the technical problems of the prior art, and the fuel pump has the advantages of simple structure, reasonable design, easy assembly and high efficiency in sucking residual fuel in auxiliary fuel tank.

[0004] The utility model discloses a kind of fuel pumps with oil suction function of auxiliary pump, which solve the technical problems of the prior art, and the fuel pump has the advantages of simple structure, reasonable design, easy assembly and high efficiency in sucking residual fuel in auxiliary fuel tank.

[0005] Preferably, the filter is detachably arranged in the inner cavity of the oil storage barrel through the mounting bracket, the mounting bracket is provided with a mounting cylinder, the inner wall of the mounting cylinder is provided with a buckling block, the outer side of the pump core is provided with a fixing bracket, the outer ring of the fixing bracket is buckled with the buckling block of the inner wall of the mounting cylinder, the pump core is detachably installed in the mounting cylinder through the fixing bracket, and the fixing bracket is provided with a filter screen at the bottom of the pump core through a filter screen frame.

[0006] Preferably, the filter is provided with an oil inlet pipe, the top of the pump core is provided with a pump oil outlet pipe, the pump oil outlet pipe is inserted into the oil inlet pipe, and a one-way valve is arranged in the pump oil outlet pipe.

[0007] Preferably, the upper cover is provided with a fuel injection nozzle, the filter is provided with an oil outlet pipe, the oil outlet pipe is provided with a pressure relief valve communicated with the inner cavity of the oil storage barrel, and the oil outlet pipe is communicated with the fuel injection nozzle of the upper cover through a corrugated pipe.

[0008] As preferred, the other end of the first oil return pipe is provided with a plug cover, and the first oil return pipe is further provided with a lead-out pipe in communication with the inner cavity of the oil storage bucket, a pipe opening of the lead-in pipe is connected with a connecting nozzle through a corrugated pipe, the connecting nozzle is connected with a quick connector through a corrugated pipe, and a sleeve pipe on the outer wall of the lead-in pipe is sleeved on an ejecting connector of the filter.

[0009] As preferred, the lower end of the lead-in pipe is further provided with a second jet cavity, an outlet side of the second jet cavity is provided with a second oil return pipe in communication with the inner cavity of the oil storage bucket, and the first oil return pipe is provided with an oil return cover on the side close to the second jet cavity, and the oil return cover covers the oil inlet of the oil storage bucket.

[0010] As preferred, the outer wall of the oil storage bucket is provided with an oil temperature sensor through a mounting support.

[0011] The beneficial effects of the utility model are:

[0012] 1. By setting the ejector assembly, high-pressure fuel output by the pump core enters the first jet cavity to generate high-speed jet flow, thereby generating negative pressure at the lead-in pipe, and the residual fuel in the auxiliary oil tank is efficiently sucked into the oil storage bucket, and the fuel utilization rate is improved.

[0013] 2. The pump core is buckled and connected with the filter mounting cylinder through the fixing frame with the buckle block, quick and stable installation and disassembly are realized, the pump oil outlet pipe of the pump core is directly inserted into the oil inlet connector of the filter, extra connecting pipelines are saved, the structure is compact, and the leakage risk is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure schematic view of the utility model embodiment;

[0015] Figure 2 It is the internal structure schematic view of the utility model embodiment;

[0016] Figure 3 It is the structure schematic view of the filter of the utility model;

[0017] Figure 4 It is an explosion view of the filter and the pump core of the utility model;

[0018] Figure 5 It is a sectional view of the ejector assembly of the utility model.

[0019] In the figure: 1, oil storage bucket; 2, upper cover; 21, oil injection nozzle; 3, pump core; 31, fixed frame; 32, filter screen frame; 33, filter screen; 34, pump oil outlet pipe; 35, one-way valve; 4, filter; 41, injection connection pipe; 42, mounting frame; 43, mounting cylinder; 44, buckle block; 45, oil inlet connection pipe; 46, oil outlet connection pipe; 47, pressure relief valve; 5, injection assembly; 51, injection inlet pipe; 52, first injection cavity; 53, first oil return pipe; 531, plug cover; 54, inlet pipe; 541, connection nozzle; 542, quick connector; 55, outlet pipe; 56, sleeve pipe; 57, second injection cavity; 58, second oil return pipe; 59, oil return cover; 6, corrugated pipe; 7, oil temperature sensor; 71, mounting bracket. DETAILED DESCRIPTION

[0020] The technical scheme of the present application will be further described below with specific examples and in conjunction with the drawings. EMBODIMENT

[0021] As Figures 1 to 5 shown in the figure, the fuel pump with a sub-pump and oil suction function comprises an oil storage bucket 1 and an upper cover 2, and the oil storage bucket 1 is internally provided with a pump core 3, a filter 4 and an injection assembly 5. The oil storage bucket 1 is a fuel storage container, and its upper end opening is closed by the upper cover 2. The upper cover 2 is provided with an oil injection nozzle 21 for delivering high-pressure fuel to the engine.

[0022] The filter 4 is detachably arranged in the inner cavity of the oil storage bucket 1 through a mounting frame 42 provided on the outer wall of the filter 4. The mounting frame 42 is provided with a mounting cylinder 43, and the inner wall of the mounting cylinder 43 is uniformly distributed with a plurality of inwardly protruding buckle blocks 44. The pump core 3 is externally provided with a fixed frame 31, and the upper end port of the fixed frame 31 can be buckled with the buckle blocks 44 on the inner wall of the mounting cylinder 43 through rotation and pressing, so as to realize quick installation and locking fixation of the pump core 3 in the mounting cylinder 43. The fixed frame 31 is provided with a filter screen 33 at the bottom of the pump core 3 through a filter screen frame 32, which is used for coarsely filtering the fuel sucked into the pump core 3.

[0023] The filter 4 is provided with an oil inlet connection pipe 45, an oil outlet connection pipe 46 and an injection connection pipe 41, and the pump core 3 is provided with a pump oil outlet pipe 34 at the top. During installation, the pump oil outlet pipe 34 of the pump core 3 is directly aligned with and inserted into the oil inlet connection pipe 45 of the filter 4, so as to realize direct delivery of high-pressure fuel from the pump core 3 to the filter 4. The pump oil outlet pipe 34 is internally provided with a one-way valve 35, which prevents reverse flow of the fuel. The oil outlet connection pipe 46 is communicated with the oil injection nozzle 21 of the upper cover 2 through a corrugated pipe 6, and the oil outlet connection pipe 46 is provided with a pressure relief valve 47 communicated with the inner cavity of the oil storage bucket 1. When the system pressure exceeds the set value, the pressure relief valve 47 is opened to release the excess fuel back to the oil storage bucket 1.

[0024] The injection assembly 5 includes an injection inlet pipe 51, the upper end of which is inserted and fixed on the injection connecting pipe 41 of the filter 4, through which high-pressure fuel can flow in, and the lower end of which is provided with a first injection chamber 52 and a second injection chamber 57; the nozzle of the injection pipe 54 is connected with a connecting nozzle 541 through the corrugated pipe 6, the connecting nozzle 541 is connected with a quick connector 542 through the corrugated pipe 6, which facilitates quick connection with the auxiliary tank oil pump; the outer wall of the injection pipe 54 is provided with a sleeving pipe 56 which is sleeved on the injection connecting pipe 41 of the filter 4, and the sleeving pipe 56 can be sleeved on the outside of the injection connecting pipe 41 of the filter 4, thereby playing a role in auxiliary positioning and strengthening connection.

[0025] The outlet side of the second injection chamber 57 is provided with a second oil return pipe 58 which is in communication with the inner cavity of the oil storage bucket 1, and the first oil return pipe 53 is provided with an oil return cover 59 on the side close to the second injection chamber 57, which covers the oil inlet (not marked in the figure) of the oil storage bucket 1. The fuel sprayed from the second injection chamber 57 forms a slight siphon effect at the oil return cover 59, and the fuel is sucked into the oil storage bucket 1 through the second oil return pipe 58.

[0026] The outer wall of the oil storage bucket 1 is provided with an oil temperature sensor 7 through a mounting bracket 71, the detection head of which is in close contact with the outer wall of the oil storage bucket 1 to sense the oil temperature, and the signal line is connected to the vehicle ECU.

[0027] When the fuel pump is working, the pump core 3 sucks in fuel from the oil storage bucket 1, pressurizes it, and then pumps it out from the pump oil outlet pipe 34, and after being filtered by the filter 4, most of the high-pressure fuel is delivered to the oil nozzle 21 of the upper cover 2 through the oil outlet connecting pipe 46 and the corrugated pipe 6 to supply the engine. At the same time, part of the high-pressure fuel enters the injection inlet pipe 51 of the injection assembly 5 through the injection connecting pipe 41, and is sprayed out at high speed from the first injection chamber 52 and the second injection chamber 57, respectively; when the high-speed fuel is sprayed out from the first injection chamber 52, a significant negative pressure is generated at the connection of the injection pipe 54, which is transmitted to the outlet of the auxiliary tank oil pump or the bottom of the auxiliary tank through the quick connector 542 of the injection pipe 54 and the connecting pipeline, thereby sucking the residual fuel in the auxiliary tank up, mixing with the main jet, and then flowing back to the oil storage bucket 1 through the first oil return pipe 53; the second injection chamber 57 can generate an additional jet, which generates an auxiliary negative pressure in the oil return cover 59, sucks the fuel in the main tank from the oil inlet of the oil storage bucket 1, and then sends it into the oil storage bucket 1 through the second oil return pipe 58. The pressure relief valve 47 ensures the safety of the system pressure, and the oil temperature sensor 7 monitors the oil temperature in real time.

Claims

1. A fuel pump with oil suction function and auxiliary pump, comprising an oil storage tank (1), an upper cover (2), characterized in that: The oil storage barrel (1) is internally provided with a pump core (3), a filter (4), and an injection assembly (5), the filter (4) is externally provided with an injection connecting pipe (41), the injection assembly (5) is in communication with the injection connecting pipe (41), the injection assembly (5) comprises an injection inlet pipe (51), the upper end of the injection inlet pipe (51) is inserted into the injection connecting pipe (41) of the filter (4), the lower end of the injection inlet pipe (51) is provided with a first injection cavity (52), the outlet side of the first injection cavity (52) is provided with a first oil return pipe (53) in communication with the inner cavity of the oil storage barrel (1), the first oil return pipe (53) is provided with an inlet pipe (54) for connecting the auxiliary oil tank oil pump.

2. The fuel pump with a sub pump and an oil suction function according to claim 1, characterized in that: The outer wall of the filter (4) is provided with a mounting bracket (42), the filter (4) is detachably arranged in the inner cavity of the oil storage barrel (1) through the mounting bracket (42), the mounting bracket (42) is provided with a mounting cylinder (43), the inner wall of the mounting cylinder (43) is provided with a buckling block (44), the outer side of the pump core (3) is provided with a fixing frame (31), the outer ring of the fixing frame (31) is buckled with the buckling block (44) of the inner wall of the mounting cylinder (43), the pump core (3) is detachably arranged in the mounting cylinder (43) through the fixing frame (31), the fixing frame (31) is provided with a filter screen (33) at the bottom of the pump core (3) through a filter screen bracket (32).

3. The fuel pump with a sub pump and oil suction function according to claim 2, characterized in that: The filter (4) is provided with an oil inlet connecting pipe (45), the top of the pump core (3) is provided with a pump oil outlet pipe (34), the pump oil outlet pipe (34) is inserted into the oil inlet connecting pipe (45), and the pump oil outlet pipe (34) is provided with a one-way valve (35) therein.

4. The fuel pump with a sub pump and an oil suction function according to claim 1, characterized in that: The upper cover (2) is provided with an oil injection nozzle (21), the filter (4) is provided with an oil outlet connecting pipe (46), the oil outlet connecting pipe (46) is provided with a pressure relief valve (47) in communication with the inner cavity of the oil storage barrel (1), and the oil outlet connecting pipe (46) is in communication with the oil injection nozzle (21) of the upper cover (2) through a corrugated pipe (6).

5. The fuel pump with a sub pump and oil suction function according to claim 1, characterized in that: The other end of the first oil return pipe (53) is provided with a plug cover (531), the first oil return pipe (53) is further provided with an outlet pipe (55) in communication with the inner cavity of the oil storage barrel (1), the pipe opening of the inlet pipe (54) is connected with a connecting nozzle (541) through a corrugated pipe (6), the connecting nozzle (541) is connected with a quick connector (542) through a corrugated pipe (6), and the outer wall of the inlet pipe (54) is provided with a sleeving pipe (56) sleeved on the injection connecting pipe (41) of the filter (4).

6. The fuel pump with a sub pump and oil suction function according to claim 1, characterized in that: The lower end of the injection inlet pipe (51) is further provided with a second injection cavity (57), the outlet side of the second injection cavity (57) is provided with a second oil return pipe (58) in communication with the inner cavity of the oil storage barrel (1), and the side of the first oil return pipe (53) close to the second injection cavity (57) is provided with an oil return cover (59), and the oil return cover (59) covers the oil inlet of the oil storage barrel (1).

7. The fuel pump with a sub pump and oil suction function according to claim 1, characterized in that: The outer wall of the oil storage barrel (1) is provided with an oil temperature sensor (7) through a mounting support (71).

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