Fuel oil low-pressure oil pipe capable of preventing empty flowing

Abstract

The utility model discloses an anti-empty fuel oil low-pressure oil pipe which comprises an oil pipe body, one end of the oil pipe body is provided with an oil storage cavity, the upper end of the oil pipe body is connected with a liquid outlet pipe, and a storage mechanism used for storing oil is arranged in the oil storage cavity. The storage mechanism comprises a piston slidably connected into the oil pipe body, the side wall of the piston is elastically connected with the oil storage cavity through a first spring, the side wall of the oil storage cavity is fixedly connected with an oil pump, the oil pump is communicated with the liquid outlet pipe through a liquid drainage pipe, and the oil pipe body is fixedly sleeved with a backflow prevention assembly. The oil pump is reasonable in structure, by arranging the oil storage cavity and the storage mechanism, when the engine stops, the piston resets under the action of the first spring, oil in the liquid outlet pipe flows into the oil storage cavity, oil backflow is avoided, when the engine is started again, the oil pump is started, oil in the oil storage cavity is pumped into the liquid outlet pipe, and the starting time of the engine is prevented from being prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of low-pressure oil pipes, in particular to an anti-airflow low-pressure fuel oil pipe. Background Art

[0002] The low-pressure fuel pipe is an important fuel supply component in the car. In the prior art, when the fuel pump stops working, the fuel in the fuel pipe will flow back to the fuel tank due to gravity, resulting in an empty fuel pipe. When the engine is started again, the fuel pump needs to extract air before it can absorb fuel, which will prolong the engine startup time and may even cause the engine to fail to start normally.

[0003] Therefore, a low-pressure fuel pipe capable of preventing fuel from flowing out is needed to solve the above-mentioned problem. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose an anti-flow low-pressure fuel oil pipe. By setting an oil storage chamber and a storage mechanism, when the engine stops, the piston is reset under the action of a first spring, and the oil in the liquid outlet pipe flows into the oil storage chamber to avoid oil backflow. When the engine is started again, the oil pump is started to pump the oil in the oil storage chamber into the liquid outlet pipe, and the oil body is pumped into the liquid outlet pipe to avoid extending the starting time of the engine.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A low-pressure fuel pipe for preventing empty fuel flow comprises a pipe body, one end of which is provided with an oil storage chamber, the upper end of which is connected with a liquid outlet pipe, the oil storage chamber is provided with a storage mechanism for storing oil, the storage mechanism comprises a piston slidably connected to the inside of the pipe body, the side wall of the piston is elastically connected to the oil storage chamber by a first spring, an oil pump is fixedly connected to the side wall of the oil storage chamber, the oil pump is connected to the liquid outlet pipe by a drain pipe, and an anti-backflow component is fixedly sleeved on the pipe body.

[0007] Preferably, a cavity is provided inside the backflow prevention component, a liquid passage groove is provided on the inner wall of the cavity, and a blocking block is provided in the liquid passage groove.

[0008] Preferably, the side wall of the blocking block is elastically connected to the inner wall of the cavity via a second spring.

[0009] Preferably, one end of the oil pipe body away from the oil storage chamber is fixedly connected to a liquid inlet joint, and the end of the liquid outlet pipe is fixedly connected to a liquid outlet joint.

[0010] Preferably, sealing rings are provided in both the liquid inlet joint and the liquid outlet joint.

[0011] Preferably, the liquid passage trough is designed in a truncated cone shape, the blocking block is designed in a truncated cone shape matching the liquid passage trough, and a sealing sleeve is provided on the blocking block.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. By setting the oil storage chamber and the storage mechanism, when supplying oil, the oil is input into the oil pipe body from the liquid inlet joint, pushing the piston to move to the right. At this time, the first spring is compressed, the piston blocks the right end of the oil pipe body, and the oil enters the engine from the liquid outlet pipe. When the engine stops, the piston is reset under the action of the first spring, and the oil in the liquid outlet pipe flows into the oil storage chamber to avoid oil backflow. When the engine is started again, the oil pump is started to pump the oil in the oil storage chamber into the liquid outlet pipe to avoid extending the starting time of the engine.

[0014] 2. By setting up an anti-backflow component, when starting, the oil enters the oil pipe body and pushes the blocking block into the cavity. At this time, the liquid flow groove opens, and the oil enters the cavity, enters the oil pipe body from the cavity, and then enters the connecting pipe. When the engine is turned off, the blocking block is reset under the action of the second spring, and the liquid flow groove is closed to prevent the oil from flowing back into the fuel tank and causing empty flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a low-pressure fuel pipe for preventing emptying proposed by the utility model;

[0016] Figure 2 This is a cross-sectional view of a low-pressure fuel pipe that prevents emptying proposed by the utility model;

[0017] Figure 3 The utility model provides a fuel low-pressure oil pipe that prevents empty flow. Figure 2 A magnified view of the structure at A;

[0018] Figure 4 The utility model provides a fuel low-pressure oil pipe that prevents empty flow. Figure 2 Enlarged view of the structure at point B in the figure.

[0019] In the figure: 1 oil pipe body, 2 oil pump, 3 oil storage chamber, 4 liquid outlet joint, 5 liquid outlet pipe, 6 liquid discharge pipe, 7 anti-backflow assembly, 8 liquid inlet joint, 9 sealing ring, 10 piston, 11 first spring, 12 liquid trough, 13 blocking block, 14 second spring, 15 cavity. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0021] Reference Figure 1-4 A low-pressure fuel pipe to prevent empty flow includes a pipe body 1, an oil storage chamber 3 is provided at one end of the pipe body 1, a liquid outlet pipe 5 is connected to the upper end of the pipe body 1, a storage mechanism for storing oil is provided in the oil storage chamber 3, and the storage mechanism includes a piston 10 slidably connected to the inside of the pipe body 1, a side wall of the piston 10 is elastically connected to the oil storage chamber 3 by a first spring 11, an oil pump 2 is fixedly connected to the side wall of the oil storage chamber 3, and it should be noted that in the initial state, the piston 10 is located on the left side of the liquid outlet pipe 5.

[0022] In the utility model, the oil pump 2 is connected to the liquid outlet pipe 5 through the drain pipe 6, and the anti-backflow component 7 is fixedly sleeved on the oil pipe body 1. The anti-backflow component 7 is provided with a cavity 15 inside. The inner wall of the cavity 15 is provided with a liquid passage trough 12. A sealing block 13 is arranged in the liquid passage trough 12. The side wall of the sealing block 13 is elastically connected to the inner wall of the cavity 15 through a second spring 14. The liquid passage trough 12 is designed in a truncated cone shape, and the sealing block 13 is designed in a truncated cone shape that matches the liquid passage trough 12. A sealing sleeve is sleeved on the sealing block 13. The sealing sleeve is made of rubber, which can improve the sealing performance and avoid liquid seepage.

[0023] In the utility model, one end of the oil pipe body 1 away from the oil storage chamber 3 is fixedly connected to a liquid inlet joint 8, and the end of the liquid outlet pipe 5 is fixedly connected to a liquid outlet joint 4. A sealing ring 9 is provided in both the liquid inlet joint 8 and the liquid outlet joint 4. The sealing ring 9 can improve the sealing performance of the connection between the liquid outlet joint 4 and the liquid inlet joint 8 to avoid oil leakage.

[0024] When the utility model is used, during oil supply, oil is input into the oil pipe body 1 from the liquid inlet joint 8, pushing the piston 10 to move to the right. At this time, the first spring 11 is compressed, the piston 10 blocks the right end of the oil pipe body 1, and the oil enters the engine from the liquid outlet pipe 5. When the engine stops, the piston 10 is reset under the action of the first spring 11, and the oil in the liquid outlet pipe 5 flows into the oil storage chamber 3 to avoid oil reflux. When the engine is started again, the oil pump 2 is started to pump the oil in the oil storage chamber 3 into the liquid outlet pipe 5 to avoid extending the starting time of the engine.

[0025] When the engine is started, oil enters the oil pipe body 1, pushing the blocking block 13 into the cavity 15. At this time, the liquid flow groove 12 is opened, and the oil enters the cavity 15, enters the oil pipe body 1 from the cavity 15, and then enters the liquid outlet pipe 5. When the engine is shut down, the blocking block 13 is reset under the action of the second spring 14, and the liquid flow groove 12 is closed to prevent the oil from flowing back into the oil tank and causing an empty flow phenomenon.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-pressure fuel pipe to prevent emptying, characterized in that: The invention comprises an oil pipe body (1), one end of which is provided with an oil storage chamber (3), the upper end of which is connected with a liquid outlet pipe (5), the oil storage chamber (3) is provided with a storage mechanism for storing oil, the storage mechanism comprising a piston (10) slidably connected inside the oil pipe body (1), the side wall of the piston (10) being elastically connected to the oil storage chamber (3) via a first spring (11), an oil pump (2) being fixedly connected to the side wall of the oil storage chamber (3), the oil pump (2) being connected to the liquid outlet pipe (5) via a liquid discharge pipe (6), and a backflow prevention component (7) being fixedly sleeved on the oil pipe body (1).

2. The anti-airflow low-pressure fuel pipe according to claim 1, characterized in that: A cavity (15) is provided inside the anti-backflow component (7), a liquid passage groove (12) is provided on the inner wall of the cavity (15), and a blocking block (13) is provided in the liquid passage groove (12).

3. The anti-airflow low-pressure fuel pipe according to claim 2, characterized in that: The side wall of the blocking block (13) and the inner wall of the cavity (15) are elastically connected via a second spring (14).

4. The anti-airflow low-pressure fuel pipe according to claim 3, characterized in that: One end of the oil pipe body (1) away from the oil storage chamber (3) is fixedly connected to a liquid inlet joint (8), and the end of the liquid outlet pipe (5) is fixedly connected to a liquid outlet joint (4).

5. The anti-airflow low-pressure fuel pipe according to claim 4, characterized in that: The liquid inlet joint (8) and the liquid outlet joint (4) are both provided with sealing rings (9).

6. The anti-airflow low-pressure fuel pipe according to claim 5, characterized in that: The liquid passage trough (12) is designed in a truncated cone shape, the blocking block (13) is designed in a truncated cone shape matching the liquid passage trough (12), and a sealing sleeve is sleeved on the blocking block (13).

Images