Engine feed and return line bypass device

Abstract

The utility model discloses an engine inlet and return oil pipeline bypass device belongs to engine test technical field, solved the problem that the fuel that enters oil consumption appearance contains certain bubble, influence oil consumption appearance measurement accuracy. The engine inlet and return oil pipeline bypass device, including the stabilizing pressure tank, the hollow cavity that is equipped with in the stabilizing pressure tank, the oil inlet of stabilizing pressure tank is equipped with with the bypass oil inlet pipe of hollow cavity intercommunication, the oil outlet of stabilizing pressure tank is equipped with with the bypass return oil pipe of hollow cavity intercommunication, the bypass oil inlet pipe, bypass return oil pipe all are equipped with the stop valve on, the top of stabilizing pressure tank is equipped with the exhaust structure that can realize automatic exhaust, the exhaust structure includes the exhaust pipe, the closing cover, the exhaust pipe vertical installation in the top of stabilizing pressure tank with the cavity intercommunication in stabilizing pressure tank, the exhaust pipe is equipped with the conical sink in. The utility model discloses an engine inlet and return oil pipeline bypass device, improve the accuracy of measurement.

Description

Technical Field

[0001] This utility model relates to the field of engine testing technology, and more specifically, it relates to an engine inlet and outlet oil pipeline bypass device. Background Technology

[0002] With the development of diesel generator sets, people have higher and higher requirements for their performance. However, fuel consumption rate is a very important performance evaluation indicator of the overall performance of the engine.

[0003] After the engine starts, fuel is delivered to the combustion chamber via electronically controlled fuel injection. Excess fuel returns to the fuel flow meter and is recirculated back into the fuel inlet line before being sent to the combustion chamber. After combustion in the engine, excess fuel in the return line produces air bubbles. This fuel containing air bubbles returns to the fuel consumption meter and, when measured by the fuel flow meter, causes fluctuations in fuel pressure and fuel consumption, leading to inaccurate measurements. Furthermore, the return of fuel containing air bubbles to the engine for combustion can cause damage. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing an engine inlet and outlet oil pipeline bypass device, which stabilizes the fuel pressure entering the fuel consumption meter to a certain extent, improves the accuracy of measurement, and effectively extends the service life of the engine.

[0005] The technical solution of this utility model is as follows: an engine inlet and outlet oil pipeline bypass device includes a pressure stabilizing tank. The pressure stabilizing tank has a hollow cavity inside. The oil inlet of the pressure stabilizing tank is provided with a bypass oil inlet pipe communicating with the hollow cavity. The oil outlet of the pressure stabilizing tank is provided with a bypass oil return pipe communicating with the hollow cavity. Both the bypass oil inlet pipe and the bypass oil return pipe are provided with shut-off valves. The top of the pressure stabilizing tank is provided with an automatic exhaust structure. The exhaust structure includes an exhaust pipe and a sealing cover. The exhaust pipe is vertically installed on the top of the pressure stabilizing tank and communicates with the cavity inside the pressure stabilizing tank. The exhaust pipe has a conical groove inside. The conical groove is adapted to the sealing cover. The sealing cover is movably inserted into the conical groove.

[0006] As a further improvement, the side wall of the conical sink is provided with a vertically upward mounting groove, and a spring is provided in the mounting groove, one end of which is connected to the side wall of the closed cover plate.

[0007] Furthermore, a sealing ring is provided between the closed cover plate and the conical sink.

[0008] Furthermore, a hollow annular frame is movably inserted into the top of the exhaust pipe. The inner diameter of the annular frame is adapted to the inner diameter of the exhaust pipe. A filter screen is provided inside the annular frame. Multiple insert blocks are provided at the bottom of the annular frame. Multiple grooves adapted to the insert blocks are provided at the top of the exhaust pipe. The multiple insert blocks are movably inserted into the multiple grooves in a one-to-one correspondence.

[0009] Furthermore, a connecting rod is provided on the side wall of the annular frame.

[0010] Furthermore, the inner wall of the hollow cavity is provided with a downwardly inclined annular guide plate, and at least one buffer plate is provided on the inner wall of the hollow cavity below the annular guide plate, and the buffer plate is provided with a plurality of through holes arranged at equal intervals.

[0011] Beneficial effects

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. This utility model provides an engine inlet and outlet fuel line bypass device, which allows a portion of the fuel in the outlet fuel line to enter the pressure stabilizing tank through the bypass inlet fuel line, while the other portion of the fuel enters the fuel consumption meter along the outlet fuel line. By diverting the flow, the number of air bubbles in the fuel entering the fuel consumption meter can be reduced to a certain extent, effectively stabilizing the fuel pressure and improving the accuracy of the fuel consumption meter measurement. At the same time, the fuel pressure after passing through the pressure stabilizing tank is relatively stable, which can expel gas in the fuel to a certain extent and reduce the number of air bubbles in the fuel. The fuel in the pressure stabilizing tank enters the engine through the bypass outlet fuel line and the outlet fuel line to continue combustion, avoiding the entry of fuel containing air bubbles into the engine and causing damage, thus effectively extending the engine's service life.

[0014] 2. The present invention provides an engine inlet and outlet oil pipeline bypass device, wherein the exhaust pipe at the top of the pressure stabilizing tank can automatically exhaust air, which helps to maintain the pressure stability inside the pressure stabilizing tank. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the buffer tank in this utility model;

[0017] Figure 3 This is a schematic diagram of the main cross-sectional structure of the exhaust pipe in this utility model;

[0018] Figure 4 for Figure 3 A magnified structural diagram of A in the middle;

[0019] Figure 5 This is a top view of the exhaust pipe structure in this utility model.

[0020] Among them: 1-Pressure stabilizing tank, 2-Hollow cavity, 3-Bypass oil inlet pipe, 4-Bypass oil return pipe, 5-Stop valve, 6-Exhaust pipe, 7-Conical trough, 8-Sealed cover plate, 9-Mounting groove, 10-Spring, 11-Annular frame, 12-Filter screen, 13-Insertion block, 14-Groove, 15-Connecting rod, 16-Annular guide plate, 17-Buffer plate, 18-Through hole, 19-Engine, 20-Oil return pipe body, 21-Oil inlet pipe body, 22-Fuel consumption meter. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0022] See Figure 1-5 An engine inlet and outlet bypass device includes a pressure stabilizing tank 1, a hollow cavity 2 inside the pressure stabilizing tank 1, an outlet of the pressure stabilizing tank 1 having a bypass inlet pipe 3 communicating with the hollow cavity 2, and an outlet of the pressure stabilizing tank 1 having a bypass return pipe 4 communicating with the hollow cavity 2. One end of the bypass return pipe 4 is connected to an inlet pipe body 21, and both ends of the inlet pipe body 21 are respectively connected to the inlet of the engine 19 and the outlet of the fuel consumption meter 22. One end of the bypass inlet pipe 3 is connected to a return pipe body 20, and both ends of the return pipe body 20 are respectively connected to the outlet of the engine 19 and the inlet of the fuel consumption meter 22. Both the bypass inlet pipe 3 and the bypass return pipe 4 are equipped with shut-off valves 5. The top of the pressure stabilizing tank 1 is equipped with an automatic venting structure, which includes an exhaust pipe 6 and a sealing cover plate 8. The exhaust pipe 6 is vertically installed on the top of the pressure stabilizing tank 1 and is connected to the cavity inside the pressure stabilizing tank 1. The exhaust pipe 6 is equipped with a conical groove 7, which is adapted to the sealing cover plate 8. The sealing cover plate 8 is movably inserted into the conical groove 7. The top of the pressure stabilizing tank 1 is arc-shaped, and its center is located on the central axis of the pressure stabilizing tank 1. The central axis of the exhaust pipe 6 coincides with the central axis of the pressure stabilizing tank 1, which makes it easier for the gas inside the pressure stabilizing tank 1 to be discharged.

[0023] During testing, the shut-off valves 5 on the bypass inlet pipe 2 and the bypass return pipe 3 are opened, allowing a portion of the fuel in the return pipe body 20 to enter the pressure stabilizing tank 1 through the bypass inlet pipe 2, while the remaining fuel enters the fuel consumption meter 22 along the return pipe body 20. This diversion reduces the amount of fuel bubbles entering the fuel consumption meter 22 to some extent, effectively stabilizing the fuel pressure and improving the accuracy of the fuel consumption meter 22. At the same time, the fuel pressure after passing through the pressure stabilizing tank 1 is relatively stable, which can expel gas from the fuel to some extent and reduce the number of fuel bubbles. The fuel in the pressure stabilizing tank 1 enters the engine through the bypass return pipe 4 and the inlet pipe body 21 to continue burning, preventing fuel with bubbles from entering the engine and causing damage, thus effectively extending the engine's service life.

[0024] In this embodiment, a vertically upward mounting groove 9 is provided on the side wall of the conical sink 7. A spring 10 is provided in the mounting groove 9. One end of the spring 10 is connected to the side wall of the sealing cover 8, and the other end of the spring 10 is connected to the bottom of the mounting groove 9. When the side wall of the sealing cover 8 is in contact with the side wall of the conical sink 7, the spring 10 is in a stretched state, so that the spring 10 exerts a downward pulling force on the sealing cover 8, further improving the sealing performance between the sealing cover 8 and the exhaust pipe 6. When fuel enters the pressure stabilizing tank 1, as the fuel flows... As the gas enters the pressure stabilizing tank 1, it is gradually compressed, while the gas carried in the fuel is discharged, further increasing the gas pressure in the pressure stabilizing tank 1. When the gas pressure in the pressure stabilizing tank 1 is greater than the sum of the pulling force of the spring 10 on the sealing cover 8 and the weight of the sealing cover 8, it will lift the sealing cover 8. At this time, the gas in the pressure stabilizing tank 1 will be discharged from the exhaust pipe 6. When the gas pressure in the pressure stabilizing tank 1 decreases to less than the pulling force of the spring 10 on the sealing cover 8, the side wall of the sealing cover 8 will be in contact with the side wall of the conical sink 7 under the action of the spring 10.

[0025] In this embodiment, a sealing ring is provided between the sealing cover plate 8 and the conical sink 7 to enhance the sealing between the sealing cover plate 8 and the exhaust pipe 6.

[0026] In this embodiment, a hollow annular frame 11 is movably inserted into the top of the exhaust pipe 6. The inner diameter of the annular frame 11 is adapted to the inner diameter of the exhaust pipe 6. A filter screen 12 is provided inside the annular frame 11. The filter screen 12 located at the top of the exhaust pipe 6 can buffer the high-pressure gas discharged from the exhaust pipe 6, preventing the high-pressure gas from directly impacting and damaging other components. At the same time, it can prevent other debris from falling into the exhaust pipe 6 and entering the hollow cavity 2 through the exhaust pipe 6. The bottom of the annular frame 11 is provided with multiple insert blocks 13, and the top of the exhaust pipe 6 is provided with multiple grooves 14 that are adapted to the insert blocks 13. The multiple insert blocks 13 are movably inserted into the multiple grooves 14 one by one. The insert blocks 13 are movably inserted into the grooves 14, thereby achieving the detachable installation of the annular frame 11 on the top of the exhaust pipe 6, which facilitates the disassembly and installation of the annular frame 11, and facilitates the cleaning or replacement of the filter screen 12.

[0027] In this embodiment, a connecting rod 15 is provided on the side wall of the annular frame 11. There are two connecting rods 15. The two connecting rods 15 are symmetrically installed on both sides of the annular frame 11 about the central axis of the annular frame 11. The operator can hold the connecting rod 15 to remove the annular frame 11 from the exhaust pipe 6 and clean or replace the filter screen 12 on the annular frame 11.

[0028] In this embodiment, the inner wall of the hollow cavity 2 is provided with a downwardly inclined annular guide plate 16, and the inner wall of the hollow cavity 2 below the annular guide plate 16 is provided with at least one buffer plate 17. The buffer plate 17 is provided with a plurality of equally spaced through holes 18. There are two buffer plates 17 in the pressure stabilizing tank 1. The two buffer plates 17 are installed on the inner wall of the hollow cavity 2 between the annular guide plate 16 and the oil outlet of the pressure stabilizing tank 1. The fuel entering the pressure stabilizing tank 1 from the bypass oil inlet pipe 2 falls onto the buffer plate 17 under the action of the annular guide plate 16, avoiding the formation of air bubbles when the fuel impacts during the fall. The combination of the annular guide plate 16 and the buffer plate 17 can reduce the air bubbles generated when the fuel falls, and at the same time, it can further exhaust the gas carried in the fuel, reduce the air bubbles in the fuel, and stabilize the fuel pressure.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A bypass device for engine inlet and return oil lines, characterized in that, The pressure stabilizing tank (1) includes a hollow cavity (2) inside the pressure stabilizing tank (1). The oil inlet of the pressure stabilizing tank (1) is provided with a bypass oil inlet pipe (3) that communicates with the hollow cavity (2). The oil outlet of the pressure stabilizing tank (1) is provided with a bypass oil return pipe (4) that communicates with the hollow cavity (2). Both the bypass oil inlet pipe (3) and the bypass oil return pipe (4) are provided with shut-off valves (5). The top of the pressure stabilizing tank (1) is provided with an automatic exhaust structure. The exhaust structure includes an exhaust pipe (6) and a sealing cover plate (8). The exhaust pipe (6) is vertically installed on the top of the pressure stabilizing tank (1) and communicates with the cavity inside the pressure stabilizing tank (1). The exhaust pipe (6) is provided with a conical groove (7). The conical groove (7) is adapted to the sealing cover plate (8). The sealing cover plate (8) is movably inserted into the conical groove (7).

2. The bypass device for engine inlet and outlet oil lines according to claim 1, characterized in that, The conical sink (7) has a vertically upward mounting groove (9) on its side wall. A spring (10) is provided in the mounting groove (9), and one end of the spring (10) is connected to the side wall of the closed cover plate (8).

3. The bypass device for engine inlet and outlet oil lines according to claim 2, characterized in that, A sealing ring is provided between the closed cover plate (8) and the conical sink (7).

4. The engine inlet and outlet oil line bypass device according to claim 1, characterized in that, A hollow annular frame (11) is movably inserted into the top of the exhaust pipe (6). The inner diameter of the annular frame (11) is adapted to the inner diameter of the exhaust pipe (6). A filter screen (12) is provided inside the annular frame (11). Multiple insert blocks (13) are provided at the bottom of the annular frame (11). Multiple grooves (14) adapted to the insert blocks (13) are provided at the top of the exhaust pipe (6). The multiple insert blocks (13) are movably inserted into the multiple grooves (14) one by one.

5. The engine inlet and outlet oil line bypass device according to claim 4, characterized in that, The annular frame (11) is provided with a connecting rod (15) on its side wall.

6. The engine inlet and outlet oil line bypass device according to claim 1, characterized in that, The hollow cavity (2) has a downwardly inclined annular guide plate (16) on its inner wall, and at least one buffer plate (17) is provided on the inner wall of the hollow cavity (2) below the annular guide plate (16). The buffer plate (17) has a plurality of through holes (18) arranged at equal intervals.

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