JPS6318880Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coupling device for connecting the water intake port of a portable power fire pump mounted on a pump-carrying vehicle to the fixed piping of the vehicle.

Pump-carrying vehicles do not simply transport a portable power fire pump to the vicinity of a fire scene, but some also carry a portable power fire pump on board and engage in firefighting operations as fire engines.

In order to facilitate firefighting in such pump-equipped vehicles, the suction pipe inside the vehicle is fixedly piped, and a portable power fire pump is mounted and connected to the vehicle, and firefighting is carried out via a ball socket on one or both sides of the vehicle body. At the scene of a fire, you can immediately extinguish a fire just by putting the soft suction pipe into a water source, and if it is difficult for cars to enter or the water source is too far away, you can use a portable fire extinguisher. The pump must be quickly removed from the vehicle and transported manually as a portable pump to extinguish the fire. In this case, therefore, it must be possible to easily remove the pump from the fixed suction pipe.

Conventionally, this type of coupling device has been used due to the nature of fire pumps, and if it is not tightened firmly, air may be sucked in and the water cannot be pumped, or if the water source is dependent on a relay from a fire engine, etc., it may cause problems. Since water leaks often occur due to the pressure of water, national standards have been established and a screw type is adopted.

However, with this screw type, there are 3 tightening rings against the water inlet.
It is necessary to turn the suction pipe more than once with both hands, which requires considerable effort and time, and may cause problems if it is urgent to uncouple the suction pipe, such as in places where it is difficult for cars to enter or the water source is too far away. Something happened.

The present invention has improved the above-mentioned drawbacks, and has made it possible to quickly connect and disconnect the fixed suction pipe and the water intake port of a portable power fire pump.

The present invention will be explained with drawings. 1 is the pump cover of the pump body, and 2 is the impeller of the pump. Reference numeral 3 denotes a water intake port of the pump, which is integrally formed with the pump cover 1.

4 is a water intake port screw, which is a screw for a standard firefighting screw-type coupling fitting, and is necessary to connect a soft water intake pipe for firefighting when the portable pump is removed from the car and used as a standalone pump. be. Reference numerals 5 and 5 are for the coupling device according to the present invention, and are screw-shaped cams provided on the outer periphery of the water inlet at the back of the standard screw 4.

These cams 5, 5 are shifted by 180 degrees and form a pair, and the two cams extend from the clamping ring 6 on the fixed suction pipe side and engage with a pair of coupling claws 7, 7. It is. As shown in FIGS. 3 and 4, the cams 5, 5 are a pair of cams 180 degrees apart, and the engagement with the connecting claws 7, 7 starts from 5a and starts at approximately 1/2 degrees. Four
It is now completed at the rotated position 5b.
The cam surface is slightly recessed at the last point 5b to prevent the cam and the engagement pawl from coming apart. c is the interference provided by this cam surface.

8 is a fixed suction pipe fixed to the car. This fixed suction pipe 8 has a collar 8a near its tip, and is held rotatably by the aforementioned tightening ring 6 between the collar 8a and a retaining nut 9 screwed together. 10
This is a handle provided on the clasp ring 6. 7,7
As mentioned above, these are a pair of coupling pawls extending forward from the tightening ring 6 and can be engaged with the threaded cams 5, 5. Although this engaging pawl is shown as a bar, it is not limited to this shape.

Reference numeral 11 denotes a dowel part provided at the tip of the fixed suction pipe 8, which fits into the inner diameter of the pump water intake port 3 to ensure the connection.

Reference numeral 12 denotes a rubber gasket held at the tip of the fixed suction tube 8, and is sandwiched between the end surface of the fixed suction tube 8 and the end surface of the water suction port 3 by the engagement of the connecting claws 7, 7 and the threaded cams 5, 5. , to prevent air from being sucked in from the outside or water leakage.

The handling and advantages of the water inlet coupling device of the present invention constructed as described above will be described.

A portable power firefighting pump is positioned and moved toward the tip of the fixed suction pipe 8, and the inner diameter of the tip of the water suction port 3 and the spigot part 11 of the fixed suction pipe 8 are fitted. In this case, the locking ring 6 is rotated to position the coupling claws 7, 7 so that they do not come into contact with the back surfaces of the threaded cams 5, 5. Grip the handle 10 and turn the tightening ring to engage the coupling claws 7, 7 and the threaded cams 5, 5.
When turned approximately 90 degrees from the starting point 5a of engagement, the coupling claws 7, 7 engage the recesses 5b, 5b on the cam surface, and the coupling is completed. The rubber gasket 12 is held between the other end faces and tightened. Since all you have to do is turn the tightening ring about 90 degrees, the joining operation can be done quickly and reliably. On the other hand, it can also be removed quickly. Since the coupling claws 7, 7 are engaged with the tightening margin of the rubber packing and the recesses 5b, 5b of the cam surface, there is no need for the coupling to come off during operation of the pump. Air suction and water leakage can be reliably prevented. Furthermore, this water inlet is also equipped with a screw for a standard firefighting screw-type coupling fitting, so a soft firefighting suction pipe can be connected to it, and it can be used as a standalone portable power firefighting pump. This has the advantage of not causing any hindrance.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cutaway perspective view of a part of the connection between the water inlet and the fixed suction pipe;
FIG. 2 is a perspective view of the tightening ring, FIG. 3 is a sectional view of the threaded cam, and FIG. 4 is a developed view of the threaded cam. 3...Pump water inlet, 4...Water inlet screw,
5, 5...Threaded cam of the water intake port, 6...Tightening ring, 7,7...Connection claw, 8...Fixed suction pipe, 12
...Rubber padskin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A threaded cam that engages with the outer periphery of the water intake port of the pump at approximately 1/4 turn is provided, and a tightening ring rotatably held at the end of the fixed suction pipe and a tightening ring are provided. A water suction port coupling device for a pump for a pump-carrying vehicle, comprising an engaging pawl fixed to a ring for engaging the threaded cam, and a rubber gasket held on a fixed suction pipe end face and pressed against the water suction pipe end face. (2) A water suction port coupling device for a pump for a pump-equipped vehicle according to claim 1, which has a threaded cam and a screw of a fire fighting screw type coupling fitting on the outer periphery of the water suction port.