JPH1143200A - Connecting structure of piping in metering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive not to have a bad effect on a pump and an instrument such as a flow meter even when piping and a housing expand and contract by a change in temp. by connecting a piping on the inlet side and a piping on the outlet side with a male/female coupling sealed with an O-ring and fixing both piping on the housing. SOLUTION: In a coupling 20 for connecting a pump and a flow meter, a female coupling 21 is fitted to a piping 6a of the outlet side of the pump with bolts 22 and a male coupling 23 inserted into this female coupling 21 is fitted to the piping 7a of the inlet side of the flow meter with bolts 24. In addition, a plurality of circular channels 25 are cut on the surrounding of a part where the male coupling 23 is inserted into the female coupling 21 and O-rings for sealing are respectively fitted therein. Therefore, when the piping 6a and 7a and the housing expand and contract by the change in temp., the length in insertion of the coupling is changed and there exists no possibility of applying an undue load on the pump and the flow meter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting structure of a meter for supplying fuel oil to an automobile.

[0002]

2. Description of the Related Art A conventional pipe connection structure of a weighing machine is constructed by connecting flanges provided at ends of both pipes with bolts,
Since the pipes were fixed to the housing, if the pipes and the housing expanded and contracted due to temperature changes, excessive loads would be applied to equipment such as pumps and flowmeters connected to the pipes, and the functions of the pumps and flowmeters would be reduced. There are inconveniences that have an adverse effect.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a pipe for a weighing machine which does not adversely affect equipment such as a pump and a flow meter even if the pipe and housing expand or contract due to a temperature change or the like. Is to provide a connection structure.

[0004]

In order to achieve the above object, according to the present invention, an inflow side pipe and an outflow side pipe are connected by a coupling, and both the pipes are fixed to a housing.
As described above, since the piping is connected by the female coupling and the male coupling inserted into the female coupling, the connection length of the coupling changes even if the piping and the housing expand or contract due to a temperature change or the like. With only this, no excessive load is applied to devices such as the pump and the flow meter, and the devices are not adversely affected.

A pump is connected to the inflow pipe, a flowmeter is connected to the outflow pipe, the inflow pipe is fixed to the housing via the pump, and the outflow pipe is connected to the flowmeter. It is fixed to the housing via.

The pipe on the inflow side is connected to a flow meter, the pipe on the outflow side is connected to a refueling hose provided with a refueling nozzle at the tip, and the pipe on the inflow side is fixed to the housing via the flowmeter. The pipe on the outflow side is fixed to the housing via a flange formed on the pipe.

Further, a plurality of circular grooves are cut in the male coupling of the coupling, and a sealing O-ring is fitted in each circular groove, so that the male coupling slightly comes off from the female coupling. Even if it is, a reliable seal can be maintained.

[0008]

Embodiments of the present invention will be described below. As shown in FIG. 1, beam plates 3, 4 and 5 are passed into a housing 2 of a weighing machine provided on an island 1 of a gas station, and a pump 6 and a beam plate 4 are placed on the beam plate 3. And a refueling amount indicator 8 on the beam plate 5 are provided. An oil supply pipe 9 from an oil storage tank (not shown) is provided in the housing 2, and the oil supply pipe 9 is connected to a pump 6 via a bellows pipe 10, and the pump 6 is connected to a flow meter 7 via a coupling 20. , The flow meter 7 is connected to the oil supply hose 11 via the coupling 30. The housing 2 is provided with a nozzle hook 13 for hooking a refueling nozzle 12 provided at the tip of the oil hose 11, and the nozzle hook 13 is provided with a nozzle switch 14.

As shown in FIG. 2, a coupling 20 for connecting the pump 6 and the flow meter 7 has a female coupling 21 attached to a pipe 6a on the outflow side of the pump 6 with bolts 22. The inserted male coupling 23 is attached to the inflow side pipe 7 a of the flowmeter 7 with a bolt 24. Around the portion where the male coupling 23 is inserted into the female coupling 21, a plurality of circular grooves 25 are cut and an O-ring 26 for sealing is fitted.

As described above, since the pump 6 and the flow meter 7 are connected by the coupling 20, when the pipes 6a and 7a and the housing 2 expand and contract due to a temperature change, the insertion length of the coupling 20 changes. An unreasonable load is not applied to the pump 6 and the flow meter 7. Further, since the coupling 20 is sealed by the plurality of O-rings 26, oil does not leak even if the insertion length is reduced.

As shown in FIG. 3, a coupling 30 for connecting the flow meter 7 and the oil supply hose 11 has a female coupling 31 attached to a pipe 7b on the outflow side of the flow meter 7 with bolts 32. The oil supply hose 11 is connected to the male coupling 33 inserted into the oil supply hose 11. Further, the male coupling 33 is provided with a flange 34 for attachment, and around a portion to be inserted into the female coupling 31,
A plurality of circular grooves 35 are cut, and O-rings 36 for sealing are fitted.

The reinforcing plate 37 is provided inside the housing 2.
The male coupling 3 from the outside of the housing 2
3 is inserted into the female coupling 31, and the bolt 38 is connected to the nut 39 welded to the reinforcing plate 37 from the flange 34 side.
And fix it.

As described above, since the housing 2 is fixed between the reinforcing plate 37 and the flange 34 so as to sandwich the housing 2, the male coupling 33 is firmly fixed to the housing 2.

In the state assembled in this way,
There is a gap of about 5 mm between the end face 31a of the female coupling 31 and the reinforcing plate 37.
Even if the insertion length of the coupling 30 changes due to expansion and contraction of the housing 2 and the like, the female coupling 31 is
There is no contact with the flowmeter 7, so that an unreasonable load is applied to the flowmeter 7 to adversely affect the accuracy and the housing 2 is not distorted. Further, the coupling 30 includes a plurality of Os.
Since the sealing is performed by the sealing ring 36, no oil leaks even if the insertion length is shortened.

[0015]

As described above, according to the present invention, the pipes on the inflow side and the pipes on the outflow side are connected by coupling, and both pipes are fixed to the housing. Shrinkage does not adversely affect devices such as pumps and flow meters.

[Brief description of the drawings]

FIG. 1 is a sectional view of a weighing machine in which the present invention is implemented.

FIG. 2 is a sectional view of a coupling for connecting a pump and a flow meter.

FIG. 3 is a cross-sectional view of a coupling for connecting a flow meter and an oil supply hose.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 island 2 housing 3, 4, 5 beam plate 6 pump 6 a, 7 a, 7 b pipe 7 flow meter 8 oil supply indicator 9 oil supply pipe 10 bellows pipe 11 oil supply hose 12 oil supply nozzle 13 nozzle hook 14 nozzle switch 20, 30 coupling 21, 31 Female coupling 22, 24, 32, 38 Bolt 23, 33 Male coupling 25, 35 Circular groove 26, 360 O-ring 37 Reinforcement plate 39 Nut

Claims (4)

[Claims] 1. A pipe connection structure for a weighing machine, wherein a pipe on an inflow side and a pipe on an outflow side are connected by a coupling, and both pipes are fixed to a housing. 2. A pump is connected to the pipe on the inflow side,
The flowmeter according to claim 1, wherein a flowmeter is connected to the outlet pipe, the inlet pipe is fixed to the housing via a pump, and the outlet pipe is fixed to the housing via the flowmeter. Piping connection structure. 3. The inflow side pipe is connected to a flow meter,
The outflow side pipe is connected to a refueling hose provided with a refueling nozzle at the tip, the inflow side pipe is fixed to the housing via a flow meter, and the outflow side pipe is connected to the housing through a flange formed in the pipe. The pipe connection structure for a weighing machine according to claim 1, which is fixed. 4. A pipe for a measuring machine according to claim 1, wherein a plurality of circular grooves are cut in the male coupling of said coupling, and an O-ring for sealing is fitted in each circular groove. Connection structure.