Pressure stabilizing device of fuel pipeline

Abstract

The utility model discloses a pressure stabilizing device of a fuel pipeline, belongs to the technical field of engines, and solves the problem that when the sealing of an inner-layer pipeline fails, fuel is accumulated in a cavity between the inner-layer pipeline and an outer-layer pipeline for a long time, and safety accidents are easily caused. The pressure stabilizing device of the fuel pipeline comprises a mounting seat and a pressure stabilizing valve mounted on the mounting seat, a mounting hole is formed in the mounting seat, the pressure stabilizing valve is inserted into the mounting hole, an annular cavity is formed in the outer wall of the pressure stabilizing valve, a third cavity is formed in the pressure stabilizing valve and communicated with the mounting hole, and the annular cavity is communicated with the mounting hole. The pressure stabilizing valve is further provided with a pressure relief cavity for communicating the annular cavity with the third cavity, the mounting seat is provided with a first cavity, and when the pressure stabilizing valve is powered off, the annular cavity corresponds to the first cavity in position and is communicated with the first cavity. According to the pressure stabilizing device of the fuel pipeline, the safety is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, and more particularly to a pressure stabilizing device for a fuel pipeline. Background Art

[0002] On ships, the pressure regulating valve is used to stabilize the fuel pressure in the fuel pipeline. It is usually connected to the fuel pipeline through a mounting seat, and the fuel pipeline usually uses a double-layer pipeline, such as Figure 1 As shown, the pressure-stabilizing valve 3 is installed on the mounting seat 1, and the double-layer fuel pipeline is installed in the second cavity 5. When the fuel pressure in the engine is too high, the pressure is relieved through the double-layer fuel pipeline. However, when the seal of the inner pipeline fails, the fuel will leak into the cavity between the inner pipeline and the outer pipeline. The air in the cavity between the inner pipeline and the outer pipeline does not circulate, and the fuel accumulates in the cavity for a long time, which is prone to safety accidents. Utility Model Content

[0003] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art and provide a pressure stabilizing device for a fuel pipeline, so that gas always flows in the cavity between the inner pipeline and the outer pipeline in the double-layer fuel pipeline, so that leaked fuel can be smoothly extracted, thereby effectively improving safety.

[0004] The technical solution of the utility model is as follows: a pressure stabilizing device for a fuel pipeline, comprising a mounting seat and a pressure stabilizing valve mounted on the mounting seat, the mounting seat being provided with a mounting hole, the pressure stabilizing valve being inserted into the mounting hole, the outer wall of the pressure stabilizing valve being provided with an annular cavity, the pressure stabilizing valve being provided with a third cavity, the third cavity being communicated with the mounting hole, the pressure stabilizing valve being further provided with a pressure relief cavity connecting the annular cavity and the third cavity, the mounting seat being provided with a first cavity, when the pressure stabilizing valve is powered off, the position of the annular cavity corresponds to the position of the first cavity and they are communicated with each other, one end of the first cavity is provided with a second cavity communicated with it, the second cavity extends in reverse to one end of the mounting seat and passes through, one side of the second cavity is provided with a ventilation cavity communicated with it, the ventilation cavity extends in reverse to the bottom of the mounting seat and passes through, the first cavity is connected to a double-layer fuel pipeline, and the ventilation cavity is communicated with the cavity between the inner layer pipeline and the outer layer pipeline corresponding to the double-layer fuel pipeline.

[0005] As a further improvement, there are three ventilation cavities, and the three ventilation cavities are located at one end of the second cavity close to the first cavity.

[0006] Furthermore, the two ventilation cavities are located at the junction of the first cavity and the second cavity.

[0007] Furthermore, a first conical opening is provided at one end of the first cavity close to the second cavity.

[0008] Furthermore, a second conical opening is provided at one end of the second cavity away from the first cavity.

[0009] Furthermore, the pressure-stabilizing valve is provided with a plurality of first sealing grooves, and the plurality of first sealing grooves are located on both sides of the annular cavity.

[0010] Furthermore, the pressure-stabilizing valve is provided with a plurality of first sealing grooves, the plurality of first sealing grooves are located on both sides of the annular cavity, and sealing rings are provided in the plurality of first sealing grooves.

[0011] Furthermore, a second sealing groove is provided at the bottom of the mounting seat, and a sealing ring is provided in the second sealing groove.

[0012] Furthermore, the sealing ring is an O-ring.

[0013] Beneficial effects

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The utility model is a pressure stabilizing device for a fuel pipeline. Double-layer pipelines are required on board. If the seal of the inner fuel pipeline fails, resulting in leakage, the cavity between the inner and outer pipelines is connected to the ventilation pipeline, so that the cavity between the inner and outer pipelines is always ventilated, and the fuel can be smoothly pumped out to ensure safety on board.

[0016] 2. The utility model provides a pressure stabilizing device for a fuel pipeline. A pressure relief cavity is provided on the pressure stabilizing valve. The pressure stabilizing valve is also provided with an annular cavity connected to the pressure relief cavity. When the pressure stabilizing valve is powered off, the position of the annular cavity corresponds to the position of the first cavity and is connected. When the fuel pressure is too high during engine operation, the fuel can flow to the first cavity through the pressure relief cavity and the annular cavity, effectively reducing the fuel pressure, thereby achieving the purpose of pressure stabilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the prior art;

[0018] Figure 2 This is a left-side perspective structural diagram of the present invention;

[0019] Figure 3 This is a right-side perspective structural diagram of the present invention;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the utility model when the power is off.

[0022] Among them: 1-mounting seat, 2-mounting hole, 3-pressure-stabilizing valve, 4-first cavity, 5-second cavity, 6-ventilation cavity, 7-annular cavity, 8-first conical opening, 9-pressure relief cavity, 10-first sealing groove, 11-third cavity, 12-second conical opening, 13-second sealing groove, 14-double-layer fuel pipeline, 141-inner pipeline, 142-outer pipeline. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0024] See Figure 2-5 , a pressure stabilizing device for a fuel pipeline, comprising a mounting seat 1 and a pressure stabilizing valve 3 mounted on the mounting seat 1, the mounting seat 1 is provided with a mounting hole 2, the pressure stabilizing valve 3 is inserted in the mounting hole 2, the outer wall of the pressure stabilizing valve 3 is provided with an annular cavity 7, the pressure stabilizing valve 3 is provided with a third cavity 11, the third cavity 11 is communicated with the mounting hole 2, the pressure stabilizing valve 3 is also provided with a pressure relief cavity 9 that connects the annular cavity 7 with the third cavity 11, a first cavity 4 is provided on the mounting seat 1, when the pressure stabilizing valve 3 is powered on, the axial position of the annular cavity 7 corresponds to the axial position of the first cavity 4 and is communicated with each other, when the pressure stabilizing valve 3 is powered on, the annular cavity 7 is not communicated with the first cavity 4; one end of the first cavity 4 is provided with a second cavity 5 communicated with it, the second cavity 5 extends in the opposite direction to one end of the mounting seat 1 and passes through, and one side of the second cavity 5 is provided with a ventilation cavity 6 communicated with it, and the ventilation cavity 6 extends in the opposite direction to the bottom of the mounting seat 1 And it runs through, the first cavity 4 is connected to the double-layer fuel pipeline 14, and the ventilation cavity 6 is connected to the cavity between the inner layer pipeline 141 and the outer layer pipeline 142 corresponding to the double-layer fuel pipeline 14; when the engine is running and the fuel pressure is too high, the fuel in the pressure regulating valve 3 can flow to the annular cavity 7 through the pressure relief cavity 9, and then flow to the first cavity 4, thereby flowing out through the double-layer fuel pipeline 14. The double-layer fuel pipeline 14 is installed in the second cavity 5, and the three ventilation cavities 6 are connected to the cavity between the inner layer pipeline 141 and the outer layer pipeline 142 of the double-layer fuel pipeline 14. When the inner layer pipeline seal fails and causes fuel leakage, the leakage will diffuse in the cavity between the inner layer pipeline and the outer layer pipeline. The cavity between the inner layer pipeline and the outer layer pipeline is connected to the ventilation cavity 6, so that the cavity between the inner layer pipeline and the outer layer pipeline is always ventilated, and the fuel can be smoothly extracted, which can ensure its safety.

[0025] In this embodiment, there are three ventilation cavities 6, which are located at one end of the second cavity 5 close to the first cavity 4. The double-layer fuel pipeline is installed in the second cavity 5, and the three ventilation cavities 6 are connected to the cavity between the inner layer pipeline and the outer layer pipeline of the double-layer fuel pipeline. When the seal of the inner layer pipeline fails and causes fuel leakage, the leakage will spread in the cavity between the inner layer pipeline and the outer layer pipeline. The cavity between the inner layer pipeline and the outer layer pipeline is connected to the ventilation cavity 6, so that the cavity between the inner layer pipeline and the outer layer pipeline is always ventilated, and the fuel can be smoothly extracted to ensure its safety. The three ventilation cavities 6 can improve its fluidity; in other embodiments, the number of ventilation cavities 6 can be increased to 4, 5, etc. to further improve its safety.

[0026] In this embodiment, two ventilation cavities 6 are located at the junction of the first cavity 4 and the second cavity 5; one end of the outer layer pipeline in the double-layer fuel pipeline is in contact with one end of the second cavity 5, and the two ventilation cylinders 6 located at the junction of the first cavity 4 and the second cavity 5 can better purge the cavity between the inner layer pipeline 141 and the outer layer pipeline 142, further ensuring the safety of the double-layer fuel pipeline 14.

[0027] In this embodiment, a first conical opening 8 is provided at one end of the first cavity 4 close to the second cavity 5. The first cavity 4 is connected to the inner layer pipeline 141, and the outer layer pipeline 142 is installed in the second cavity 5. The first conical opening 8 facilitates the rapid alignment of the inner layer pipeline 141 in the double-layer fuel pipeline with the first cavity 4, thereby improving the installation efficiency, and the end face of the connecting port of the inner layer pipeline 141 fits with the inner wall of the first cavity 4, thereby forming a seal. The first conical opening 8 can fit more closely with the port of the inner layer pipeline 141, thereby effectively improving its sealing effect.

[0028] In this embodiment, a second conical opening 12 is provided at one end of the second cavity 5 away from the first cavity 4, and the end face of the connecting port of the outer layer pipeline 142 is tightly fitted with the wall surface of the second conical opening 13, effectively improving its sealing effect, and the second conical opening 12 is conducive to the installation of the outer layer pipeline 142, effectively improving its installation efficiency.

[0029] In this embodiment, a plurality of first sealing grooves 10 are provided on the pressure-stabilizing valve 3, and the plurality of first sealing grooves 10 are located on both sides of the annular cavity 7. Sealing rings are provided in the plurality of first sealing grooves 10 to improve the sealing between the pressure-stabilizing valve 3 and the mounting seat 1, thereby preventing fuel leakage and outflow from the mounting hole 2.

[0030] In this embodiment, a second sealing groove 13 is provided at the bottom of the mounting base 1, and a sealing ring is provided in the second sealing groove 13. Through holes are provided on both sides of the mounting base 1, and the mounting base 1 is connected to other components through the through holes. At this time, the mounting hole 2 is sealed through the second sealing groove 13 to enhance its sealing performance. The center of the second sealing groove 13 coincides with the center of the mounting hole 2, effectively improving its sealing effect.

[0031] In this embodiment, the sealing ring is an O-ring. Compared with sealing rings of other specifications, the O-ring has the advantages of simple structure, easy installation, and good sealing performance.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A fuel line pressure stabilizing device, comprising a mounting seat (1), and a pressure stabilizing valve (3) mounted on the mounting seat (1), characterized in that: The mounting seat (1) is provided with a mounting hole (2), the pressure-stabilizing valve (3) is inserted into the mounting hole (2), the outer wall of the pressure-stabilizing valve (3) is provided with an annular cavity (7), the pressure-stabilizing valve (3) is provided with a third cavity (11), the third cavity (11) is communicated with the mounting hole (2), the pressure-stabilizing valve (3) is further provided with a pressure relief cavity (9) for communicating the annular cavity (7) with the third cavity (11), the mounting seat (1) is provided with a first cavity (4), and when the pressure-stabilizing valve (3) is powered off, the position of the annular cavity (7) and the position of the first cavity (4) are aligned. Correspondingly and interconnected, one end of the first cavity (4) is provided with a second cavity (5) connected thereto, the second cavity (5) extends in the reverse direction to one end of the mounting seat (1) and passes through it, one side of the second cavity (5) is provided with a ventilation cavity (6) connected thereto, the ventilation cavity (6) extends in the reverse direction to the bottom of the mounting seat (1) and passes through it, the first cavity (4) is connected to the double-layer fuel pipeline (14), and the ventilation cavity (6) is connected to the cavity between the inner layer pipeline (141) and the outer layer pipeline (142) corresponding to the double-layer fuel pipeline (14).

2. A fuel line pressure stabilizing device according to claim 1, characterized in that: There are three ventilation cavities (6), and the three ventilation cavities (6) are located at one end of the second cavity (5) close to the first cavity (4).

3. A fuel line pressure stabilizing device according to claim 2, characterized in that: Two of the ventilation cavities (6) are located at the junction of the first cavity (4) and the second cavity (5).

4. A fuel line pressure stabilizing device according to claim 1, characterized in that: A first conical opening (8) is provided at one end of the first cavity (4) close to the second cavity (5).

5. A fuel line pressure stabilizing device according to claim 1, characterized in that: A second conical opening (12) is provided at one end of the second cavity (5) away from the first cavity (4).

6. A fuel line pressure stabilizing device according to claim 1, characterized in that: The pressure stabilizing valve (3) is provided with a plurality of first sealing grooves (10), the plurality of first sealing grooves (10) are located on both sides of the annular cavity (7), and sealing rings are provided in the plurality of first sealing grooves (10).

7. A fuel line pressure stabilizing device according to claim 6, characterized in that: A second sealing groove (13) is provided at the bottom of the mounting seat (1), and a sealing ring is provided in the second sealing groove (13).

8. A fuel line pressure stabilizing device according to claim 7, characterized in that: The sealing ring is an O-type sealing ring.

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