JPH0123677B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to an electric injection pump.

Conventional configurations and their problems In general, pumps that fill kerosene, etc. from tanks to kerosene stoves, etc. have recently been powered by batteries.
A device with a small pump that absorbs and lubricates oil has been developed. In these electric liquid injection pumps, lead wires must be wired from the power source to the motor of the pump section, or to the liquid level sensor section, etc. via the liquid passage. Other attached mechanisms must be completely waterproof.

For this reason, conventionally, Figures 4 and 5
Waterproofing measures were taken as shown in the figure. That is, 19 in the figure indicates a part of the liquid injection pump body,
The lower end 20 leads to a suction section equipped with a pump and a motor (both not shown), the left end 21 leads to a spout section equipped with a liquid level sensor (not shown), and the upper end 22 has a battery such as a dry battery. A power supply section and an electronic switch circuit section (both not shown) are equipped. The lower end 20 and the left end 21 communicate with each other to form a liquid flow path 23, and a lead wire 24 is guided into the flow path 23 from a power supply section at the upper end 22, and is connected to a motor, a liquid level sensor, etc. as appropriate. It is becoming more and more common. Here, the upper end portion 22
A small hole 25 and a rubber plug holder 26 are formed in the lead-out portion of the lead wire 24, and the lead wire 24 is inserted into the rubber plug 27.
, then through the small hole 25, and then through the rubber stopper 27.
The lead-out portion of the lead wire 24 was sealed by adhering it to the rubber plug receiver 26.

However, in such a structure, the hole in the rubber plug 27 must be made small in order to improve the sealing performance between the lead wire 24 and the rubber plug 27, which makes it difficult to insert the lead wire 24. There was a drawback that if the wire 24 was strongly pulled or moved, the sealing performance deteriorated.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and an object of the present invention is to provide an electric liquid injection pump that allows easy insertion of lead wires and has an excellent sealing effect.

Structure of the Invention In order to achieve the above object, the present invention provides a partition wall at the lower part of an upper cylinder having at least a power supply section, and forms a lead wire insertion hole in the partition wall with a diameter sufficiently large to allow the lead wire to be inserted therethrough. In addition, a receiver is provided surrounding the lead wire insertion hole, a seal washer through which the lead wire is passed is placed over the lead wire insertion hole, a sealing material is filled on top of the seal washer, and a seal cap through which the lead wire is passed is placed in the receiver. With this configuration, when wiring the lead wires, the lead wire insertion hole in the bulkhead located at the back is large, so
It is easy to pass the lead wire through, and because of the presence of the seal washer, the sealing performance is not impaired even if the lead wire insertion hole is large. Since the sealing material enters the gap between the lead wire and the hole of each member, the sealing effect can also be enhanced.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the figure, reference numeral 1 denotes a pump main body, which includes a battery 3 built in an upper cylinder 2 to constitute a power supply section, and an electronic switch circuit section 4 built into the upper part of the pump main body 1. Further, the lower part of the pump body 1 is provided with a liquid suction pipe 5, and a liquid injection pipe 6 communicating with this liquid suction pipe 5 at the upper part, and a pump section 7 and a motor 8 are provided at the tip of the liquid suction pipe 5. . Further, a liquid level sensor 9 is provided at the tip of the liquid injection pipe 6. The central part of the pump body 1 and the liquid suction pipe 5
A partition wall 10 is provided between the liquid injection tube 6 and the liquid passage portion, and the partition wall 10 is provided with a relatively large lead wire insertion hole 11 and a receiving tube 12 surrounding the lead wire insertion hole 11. There is. A seal washer 14 having a lead wire insertion hole 13 is provided at the inner bottom of the receiving tube 12, and a lead wire 15 led out from a power source etc. is inserted between the seal washer 14 and the partition wall 1.
The lead wires are guided downward through the lead wire insertion holes 11 and 13 of No. 0, and are connected to the motor 8 and the liquid level sensor 9. The receiving tube 12 is filled with an adhesive sealing material 16, and a seal cap 17 made of an elastic material fitted onto the lead wire 15 is attached to the receiving tube 12.
It is mated to Note that 18 in the figure is a switch of the power supply section.

Effects of the Invention As described above, the electric infusion pump of the present invention is configured as described above, and when wiring the lead wire, the lead wire insertion hole in the bulkhead located at the deep end is large, so It is easy to pass the lead wire through, and since a seal washer is provided, the sealing performance is not impaired even if the lead wire insertion hole is large. Moreover, the seal washer and seal cap can be easily fitted together by simply passing them through the lead wire insertion hole and then the lead wire, and when the seal cap is fitted into the receiving tube, Since the sealing material enters the gap between the lead wire and the hole of each member due to pressure, the sealing effect can also be enhanced.

[Brief explanation of drawings]

Fig. 1 is a sectional side view of an electric injection pump showing an embodiment of the present invention, Fig. 2 is a sectional side view of the same main part, Fig. 3 is a perspective view of the main part, and Fig. 4 is a conventional electric injection pump. FIG. 5 is a sectional side view of the main part of the liquid pump, and FIG. 5 is a perspective view of the main part. 1...Pump body, 2...Upper tube, 3...Battery, 5...Liquid suction pipe, 6...Liquid injection pipe, 7...Pump section, 8...Motor, 9...Liquid level sensor, 10 …
... Partition wall, 11 ... Lead wire insertion hole, 12 ... Receiving tube, 14 ... Seal washer, 15 ... Lead wire, 16 ... Seal material, 17 ... Seal cap.

Claims (1)

[Claims] 1. In a device that has at least an upper cylinder with a power supply part, a suction pipe and a liquid injection pipe connected to the lower part of this upper cylinder, and a lead wire is led out from the power supply part of the upper cylinder and wired to the pump part of the suction pipe, etc. , a partition wall is provided at the bottom of the upper tube, a lead wire insertion hole is formed in the partition wall with a diameter large enough to allow the lead wire to be inserted, and a receiving tube is provided to surround the lead wire insertion hole, and a seal is formed through which the lead wire is passed. An electric liquid injection pump characterized in that a washer is placed over the lead wire insertion hole, a sealing material is filled thereon, and a seal cap through which the lead wire is passed is fitted into the receiver.