CN204327365U - The fuel oil return structure for air of Injection Pump and oil sprayer - Google Patents

Abstract

The utility model relates to the technical field of fuel oil return structure, in particular to a fuel oil return structure of a fuel injection pump and a fuel injector. One side of the fuel injector pipe joint is connected to the oil return pipe of the fuel injector, and the other end of the fuel injector pipe joint opposite to the oil return pipe of the fuel injection pump is connected to an oil return collection pipe joint, and the oil return collection pipe joint is connected to a collection return pipe. The oil channel, the injector pipe joint and the oil return collection pipe joint are connected together by a hollow bolt. The studs of the hollow bolt are provided with a first through hole and a second through hole in sequence from top to bottom. The first through hole Located in the fuel injector pipe joint, the second through hole is located in the oil return collection pipe joint, the oil return pipe of the fuel injector communicates with the first through hole, and the second through hole communicates with the collection and return channel of the oil return collection pipe joint . Beneficial effects of the utility model: oil can be taken at any angle, and smooth oil return can be ensured.

Description

Fuel return structure of fuel injection pump and injector

technical field

The utility model relates to the technical field of fuel oil return structure, in particular to a fuel oil return structure of a fuel injection pump and a fuel injector.

Background technique

The fuel oil return structure of the existing fuel injection pump and fuel injector is shown in Fig. 3 and Fig. 4, wherein it can be seen from Fig. The fuel oil of the injector is returned to the oil through the oil return pipe 3' of the injector, and the two kinds of return fuel oil are converged and sent to the outside of the diesel engine through the oil return collection pipe 4'. In this structure, the oil return collection pipe 4' and the oil return pipe of the injector 3' design in one piece.

In the above structure, the oil return collection pipe 4' and the injector oil return pipe 3' are designed as one, so that the oil return collection pipe 4' is fixed and cannot be rotated at will. When the user takes oil, it can only be installed according to this fixed direction If the angles of the oil pipes are not uniform, it is very easy to cause fracture of the oil return collection pipe 4' and the pipe joint body.

It can be seen from Fig. 4 that the hollow bolt 5' has only one row of through holes. If the oil return volume is large, it cannot be ensured whether the oil return is unobstructed.

Utility model content

The technical problem to be solved by the utility model is: to provide a fuel oil return structure of the fuel injection pump and the fuel injector, so as to solve the problem that the existing fuel oil return structure of the fuel injection pump and the fuel injector cannot be realized due to the limitation of its own structural design Installing the oil pipe at any angle leads to the technical problems of inconvenient oil extraction and easy damage to the oil return structure.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: a fuel oil return structure of fuel injection pump and fuel injector, including a fuel injector pipe joint, one end of the fuel injector pipe joint is connected to the fuel return oil of the fuel injection pump Pipeline, one side of the fuel injector pipe joint is connected to the oil return pipe of the fuel injector, and the other end of the fuel injector pipe joint opposite to the oil return pipe of the fuel injection pump is connected to an oil return collection pipe joint, The oil return collection pipe joint is connected to a collection oil return channel, the fuel injector pipe joint and the oil return collection pipe joint are connected together through a hollow bolt, and the studs of the hollow bolt pass through the The oil return collection pipe joint and the fuel injector pipe joint, and the stud head of the hollow bolt is located outside the oil return collection pipe joint;

The studs of the hollow bolts are sequentially provided with a first through hole and a second through hole from top to bottom, the first through hole is located in the fuel injector pipe joint, and the second through hole is located in the In the oil return collection pipe joint, the oil return pipe of the fuel injector communicates with the first through hole, and the second through hole communicates with the oil collection return channel of the oil return collection pipe joint.

As a further improvement, a sealing gasket is provided between the fuel injector pipe joint and the connection end of the oil return collection pipe joint, and a seal is also provided at the connection between the oil return collection pipe joint and the stud head of the hollow bolt. washer.

Owing to adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

Since an oil return collecting pipe joint is connected to the other end of the fuel injector pipe joint opposite to the oil return pipe of the fuel injection pump, the fuel injector pipe joint and the oil return collecting pipe joint are designed separately, and there is a hollow space between the two. The bolts are connected together so that the angle of the oil return pipe joint of the oil return collection pipe joint can be adjusted arbitrarily according to the needs of the user during oil extraction, so as to meet the task of oil extraction at any angle and ensure smooth oil extraction. The installation consistency between the oil intake pipe and the oil return collection pipe avoids the problem of damage to the pipe and pipe joints caused by inconsistent installation angles, thereby prolonging the service life of the oil return pipe of the injector.

Since the stud of the hollow bolt is provided with a first through hole and a second through hole in sequence from top to bottom, the first through hole is located in the fuel injector pipe joint, and the second through hole is located in the oil return collection pipe joint. The oil return pipe of the oil return pipe is connected with the first through hole, and the second through hole is connected with the collection oil return channel of the oil return collection pipe joint, which increases the oil return circulation channel, which can realize the distribution and circulation of the return oil, and ensure a large amount of oil return When the oil return channel is small, it will not be blocked due to the lack of oil return passage, so as to ensure the smooth progress of oil return.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural view of the hollow bolt in Fig. 1;

Fig. 3 is a schematic diagram of a fuel oil return structure in the prior art;

Fig. 4 is the structural representation of the hollow bolt in Fig. 3;

In the figure: 1. Fuel injector pipe joint, 2. Oil return pipe of fuel injection pump, 3. Oil return pipe of fuel injector, 4. Oil return collection pipe joint, 5. Collection oil return channel, 6. Hollow bolt, 60, stud, 61, stud head, 7, the first through hole, 8, the second through hole, 9, sealing washer.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Fig. 1 and Fig. 2 together, a fuel oil return structure of a fuel injection pump and a fuel injector includes a fuel injector pipe joint 1, one end of the fuel injector pipe joint 1 is connected to a fuel return pipe 2 of the fuel injection pump, and One side of the fuel injector pipe joint 1 is connected to the oil return pipe 3 of the fuel injector, and the other end of the fuel injector pipe joint 1 opposite to the oil return pipe 2 of the fuel injection pump is connected to an oil return collection pipe joint 4, and the oil return collection pipe The joint 4 is connected to a collection oil return passage 5, and the fuel injector pipe joint 1 and the oil return collection pipe joint 4 are connected together through a hollow bolt 6, and the stud 60 of the hollow bolt 6 passes through the oil return collection pipe joint 4 and the oil return collection pipe joint 4 in turn. The fuel injector pipe joint 1, and the stud head 61 of the hollow bolt 6 is located outside the oil return collection pipe joint 4;

The stud 60 of the hollow bolt 6 is provided with a first through hole 7 and a second through hole 8 in sequence from top to bottom, the first through hole 7 is located in the injector pipe joint 1, and the second through hole 8 is located in the oil return In the pipe joint 4 , the position of the oil return pipe 3 of the injector corresponds to the position of the first through hole 7 , and the position of the second through hole 8 corresponds to the position of the collection oil return channel 5 of the oil return collection pipe joint 4 .

In order to ensure the tightness between the pipe joint and the pipe joint, as well as the tightness between the pipe joint and other connecting parts, the following connection relationship can be adopted specifically:

A sealing gasket 9 is provided between the fuel injector pipe joint 1 and the connecting end of the oil return collecting pipe joint 4 , and a sealing gasket 9 is also provided at the connection between the oil returning collecting pipe joint 4 and the stud head 61 of the hollow bolt 6 .

The fuel injector pipe joint 1 and the oil return collection pipe joint 4 are designed separately to form two parts with relative connection positions, so that when the user takes oil and installs the oil pipe, he can rotate the oil return pipe arbitrarily according to the position of the oil pipe. The position of the pipe joint 4 not only facilitates the user to take oil, but also prolongs the service life between the pipe joint and the pipeline.

The through holes of the hollow bolt 6 are increased to two rows. The first through hole 7 is mainly responsible for the oil return of the oil return pipe 3 of the injector, and the second through hole 8 is mainly responsible for the oil outlet of the oil return collection pipe joint 4. If the oil return volume When it is larger, the oil return volume can be quickly distributed to meet the demand for smooth oil return.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (2)

1. the fuel oil return structure for air of Injection Pump and oil sprayer, comprise oil sprayer pipe joint (1), one end of described oil sprayer pipe joint (1) connects the oil returning tube (2) of Injection Pump, the side of described oil sprayer pipe joint (1) connects the oil returning tube (3) of oil sprayer, it is characterized in that, the other end of the described oil sprayer pipe joint (1) relative with the oil returning tube (2) of described Injection Pump connects an oil return influx pipe joint (4), described oil return influx pipe joint (4) connects one and collects drainback passage (5), linked together by a hollow bolt (6) in described oil sprayer pipe joint (1) and described oil return influx pipe joint (4), the stud (60) of described hollow bolt (6) is successively through described oil return influx pipe joint (4) and described oil sprayer pipe joint (1), and the stud head (61) of described hollow bolt (6) is positioned at the outside of described oil return influx pipe joint (4),

The stud (60) of described hollow bolt (6) is provided with the first through hole (7) and the second through hole (8) from top to bottom in turn, described first through hole (7) is positioned at described oil sprayer pipe joint (1), described second through hole (8) is positioned at described oil return influx pipe joint (4), the oil returning tube (3) of described oil sprayer is corresponding with described first through hole (7) position, described second through hole (8) and described oil return influx pipe joint (4) to collect drainback passage (5) position corresponding.

2. the fuel oil return structure for air of Injection Pump according to claim 1 and oil sprayer, it is characterized in that, be provided with seal washer (9) between described oil sprayer pipe joint (1) and described oil return influx pipe joint (4) connecting end, described oil return influx pipe joint (4) is also provided with seal washer (9) with stud head (61) joint of described hollow bolt (6).