JPS623595Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a piping structure for two circuits used for suction and discharge of a pump in a cooling system of an internal combustion engine.

By the way, in the cooling system of an internal combustion engine,
The suction side and discharge side pipes of the pump are installed in parallel, but in this case, a large space for two pipes is required on the side of the engine, and each pipe is installed in parallel to prevent vibration. Each pipe needs to be fixed to the side of the engine, requiring a large number of pipe support parts.

The present invention was developed in view of these circumstances, and involves fitting a small-diameter pipe into a large-diameter pipe, and connecting both ends of the large-diameter pipe to joint members fitted to the small-diameter pipe. In addition, by forming an opening in the joint member that serves as the entrance and exit of the passage between the two pipes, a passage passing through the small diameter pipe and a passage passing between the two pipes from one joint member to the other pipe can be formed. The two passages leading to the joint member are integrally constructed, so that when two circuits are installed in parallel, such as on the suction side and discharge side of a pump, both circuits can be connected together. This makes it possible to install the pipe in a space equivalent to that of a real pipe, and also allows the number of pipe supporting parts to be reduced when fixing it to the side of the engine.

This will be explained below using an example regarding a cooling system of an internal combustion engine. In Fig. 1, 1 is an engine;
2 is a cooling system in the engine, in which cooling water is sucked in from the outside by a cooling water pump 3 through a suction pipe 4 and a suction/discharge pipe 5;
The cooling water that is supplied to the inside of the engine via the piping 5 and the oil cooler 6, and which has further cooled the inside of the engine, is passed through a temperature control valve 7 to a circulation piping 9 that joins the exhaust pipe 8 or the suction side of the pump according to its temperature. It is forced to flow into the country. The suction and discharge piping 5 has two integrated suction and discharge circuits, and its structure will be explained with reference to FIGS. A space A is provided between the inserted small-diameter pipes because the outer diameter of the small-diameter pipe is smaller than the inner diameter of the large-diameter pipe. Reference numerals 12 and 13 designate joint members of the same shape that are fitted on the outside of the small-diameter pipe 11 and connected to both ends 10a and 10b of the large-diameter pipe 10, respectively. Large-diameter insertion ports 12a, 13a into which the ends 10a, 10b of the pipes are inserted, and a through-hole 12b for the small-diameter pipe 11 that protrudes from the end of the large-diameter pipe and passes through the member, on the other end surface. 13b are formed respectively, and furthermore, both pipes 10,
Openings 12c, 12d, 13 that communicate with the space A between 11 and serve as entrances and exits for passages passing through the space.
c and 13d are formed respectively. Here, in this embodiment, one end 11a of the small diameter pipe 11 is
The discharge port 3a of the pump 3 via the connection member 14
The other end 11b is connected to the oil cooler 6 via a connecting pipe 15, and the suction pipe 4 is connected to one opening 12c of the joint member 12 at one end 10a of the large diameter pipe 10. The circulation piping 9 is connected to the other opening 12d, and one opening 13c of the joint member 13 at the other end 10b of the large-diameter pipe 10 is connected to the other opening 12d through the elbow 16, the connecting pipe 17, and the connecting member 18. The other opening 13d connected to the suction port 3b of the pump is closed by a blind lid 19.

According to the above configuration, the cooling water sucked in from the outside via the suction pipe 4 is fed through the opening 12c of one of the joint members 12 in the suction and discharge piping 5, and the cooling water returned through the circulation piping 9 is sucked in from the outside through the suction pipe 4. Large and small diameter pipes 10 and 11 are inserted from the opening 12d of the member, respectively.
After passing through the space A, it flows from the opening 13c of the other joint member 13, through the elbow 16 and the connecting pipe 17, to the suction port 3b of the pump 3, and is discharged from the pump. Similarly, the cooling water passes through a small diameter pipe 10 in the suction and discharge piping 5 and is supplied to the oil cooler 6 or the engine 1, and in this way, the cooling water sucked into the pump 3 and discharged from the pump are separated. All of the cooling water is passed through the pipe 5, so that the two suction and discharge circuits are integrated.

As described above, the present invention allows a small-diameter pipe to be inserted into a large-diameter pipe through a space, and each inner side of the two joint members with the left and right ends of the large-diameter pipe having the same shape is The projecting portions of the small-diameter pipe that protrude from both ends of the large-diameter pipe are inserted into and supported through the through-holes formed on the outer end surface of the joint member. Furthermore, since the joint member is configured to have an opening that communicates with the space in a direction that crosses both the pipes, when two circuits are parallel, such as the suction side and the discharge side of the pump, both It is now possible to form a circuit with integrated piping, and as a result, the space required for two pipes is now sufficient for one pipe, which frees up space and reduces piping. In addition, the double structure of the piping increases rigidity, reduces resonance when installed on the side of an internal combustion engine, and reduces the need for pipe support parts. In addition to the effect that the number of points is halved compared to when two pipes are installed, especially when using the present invention, the left and right joint members used for piping are of the same shape, and each outlet and penetration By supporting each of the large-diameter and small-diameter pipes by the opening, and providing an opening that communicates with the space between these two pipes and serves as the entrance and exit of the passage in the direction that crosses the two pipes in the member. Since the structure is simple, the piping work can be carried out accurately and quickly, and the support strength can be increased, which has the effect of ensuring long-term stable use for internal combustion engines that are subject to severe vibrations. still,
The present invention can be widely applied not only to the cooling system of an internal combustion engine as shown in the embodiment, but also to fluid transfer piping when two circuits are installed in parallel.

[Brief explanation of drawings]

FIG. 1 is a front view showing a cooling system of an internal combustion engine embodying the present invention, and FIGS. 2 and 3 are an enlarged front view and a plan view of main parts in this embodiment. 5...Piping, 10...Large diameter pipe, 11...
Small diameter pipe, 12, 13...Joint member, 12
c, 12d, 13c, 13d...openings.

Claims (1)

[Scope of utility model registration request] A small-diameter pipe is inserted into a large-diameter pipe through a space, and then both ends of the large-diameter pipe are fitted into insertion ports formed on the inner end faces of two joint members with the left and right sides of the same shape. At the same time, the projecting portions of the small-diameter pipe that protrude from both ends of the large-diameter pipe are inserted and supported through through holes formed in the outer end faces of the joint member. A piping structure for two circuits, characterized in that an opening communicating with the space is provided in a direction crossing both the pipes.