JPH0452479Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) This invention relates to an electric pump used, for example, to supply kerosene from a storage tank to an internal tank of an oil stove.

(Prior art) An electric pump has been developed that uses a dry battery or other power source to drive a submerged motor pump to supply kerosene filled in a storage plastic tank to the built-in tank of a kerosene heater or the cartridge tank of a fan heater. .

Conventionally, as shown in FIG. 5, a submersible motor pump 102 is disposed at the bottom of a liquid suction pipe 101, and a battery storage section 103a for storing dry batteries, a control circuit board, and an operation switch are installed at the top of this liquid suction pipe 101. Control circuit storage section 103 in which 104 is arranged
A storage case 103 consisting of a storage case 103 is integrally formed, and a liquid supply pipe 106 is connected to a connecting portion 105 formed on the upper peripheral surface of the liquid suction pipe 101 extending into the storage case 103.
Liquid injection pipe 1 with liquid level sensor 107 installed via
An electric pump with a structure of connecting 08 was developed in 1980.
-Disclosed in Publication No. 54794.

In addition, as shown in FIG. 6, a liquid suction pipe 202 with a submerged motor pump 201 built in at its lower end, and a liquid injection pipe 204 communicating with the upper end of this liquid suction pipe 202 and having a liquid level sensor 203 built in at its tip. The submerged motor pump 201 is turned on in response to a control signal from the liquid supply pipe 205 connected thereto, a dry battery 206 approximately in the middle thereof, and a control signal from the liquid level sensor 203. Storage case 207 containing a control circuit for off-control
An electric pump with a structure consisting of
It is disclosed in Publication No. 52390.

(Problems to be solved by the invention) The above-mentioned conventional proposal, published in U.S. Pat.
In the case of Japanese Utility Model Application Publication No. 60-52390, when liquid suction pipes 101 and 202, in which relatively heavy single batteries, control circuit boards, etc. are assembled on the upper part, are attached to a lightweight and unstable storage polyester tank, The center of gravity of the storage plastic tank becomes high, making it unstable, making it prone to tipping over due to small external forces such as vibrations and contact, which is dangerous. In particular, as the amount of kerosene remaining in the storage plastic tank decreases, the center of gravity becomes higher, and the stability of the storage plastic tank is significantly impaired. In this way, when the amount of kerosene in the storage plastic tank decreases, it is more likely to tip over due to weak external force, so when refueling the liquid fuel combustion equipment with kerosene, it is necessary to hold the storage plastic tank with your hand while operating it. However, there were problems such as the fact that it was extremely troublesome to handle.

The present invention has been developed in view of the above-mentioned problems, and aims to provide an electric pump that is safe and easy to operate without compromising the stability of the storage polyester tank.

(Means and effects for solving the problems) The electric pump of the present invention is provided with a storage section for storing a power supply, a control circuit, etc. above the liquid injection pipe in which a liquid level sensor is arranged, and A liquid suction pipe having a communication hole is connected to the liquid suction pipe via a liquid sending pipe, and a submerged motor is installed at the bottom of this liquid suction pipe.

This invention concentrates the power supply, control circuit, etc. on the upper part of the liquid injection pipe attached to the liquid fuel combustion device, which has a sense of stability, so the center of gravity of the storage plastic tank can be kept low and the stability of the storage plastic tank can be increased. I can do it.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a liquid injection pipe that is attached to a built-in tank of a liquid fuel combustion device (not shown) and supplies kerosene as fuel, and a discharge port 1 at the lower end of this liquid injection pipe 1.
A liquid level sensor 2 is installed near a.
A branch part 3 is integrally formed on the upper outer circumferential surface of the liquid injection pipe 1 at a predetermined inclination angle with respect to the central axis of the liquid injection pipe 1, and a bellows-shaped tip is provided at the tip of the branch part 3. The liquid sending pipe 4 is fluid-tightly connected by a fitting ring 5. A liquid suction pipe 6 is fluid-tightly connected to the tip of the liquid sending pipe 4 by a fitting ring 7.
In the liquid suction pipe 6, a submerged motor pump 8 consisting of an impeller 8a for sucking up kerosene and a submerged motor 8b for driving the impeller 8a is installed near the suction port 6a at the lower end. In addition, a communication hole 9 communicating with the atmosphere is formed near the connection part of the liquid suction pipe 6 to prevent a siphon effect. A liquid return pipe 10 is provided on the outside of the upper part so as to cover the communication hole 9. The liquid return pipe 10 is supported by a plurality of ribs 11 protruding from the outer peripheral surface of the liquid suction pipe 6.

On the other hand, in the upper part of the liquid injection pipe 1, there is a storage part 14 that houses a power source 12 such as a dry battery or a nickel cadmium battery, and a control circuit board 13 that drives and controls the submerged motor pump 8 based on information from the liquid level sensor 2. An operating switch 15 for controlling power on/off is attached to its outer surface. An annular partition plate 16 is provided between the storage section 14 and the flow path of the liquid injection tube 1, that is, on the inner surface of the upper part of the liquid injection tube 1, and is partitioned off liquid-tightly by a rubber bush 17. From the control circuit board 13 are a liquid level sensor code 18 and a submerged motor pump code 19.
penetrates the rubber bush 17 in a fluid-tight manner and is connected to the liquid level sensor 2 and the submerged motor 8b through the insides of the liquid injection pipe 1 and the liquid suction pipe 6, respectively.

When using this electric pump to supply kerosene from the storage plastic tank to the built-in tank of a liquid fuel combustion device, first install the liquid injection pipe 1 into the built-in tank of the combustion device, and then install the liquid suction pipe 6 into the storage plastic tank. .
If the operation switch 15 is turned on in this state,
The submerged motor 8b is driven and the impeller 8a rotates. The kerosene sucked up by the impeller 8a is supplied into the built-in tank of the combustion device through the liquid suction pipe 6, the liquid supply pipe 4, and the liquid injection pipe 1. At this time, a part of the kerosene flows out through the communication hole 9, but the flowed fuel is returned into the storage polyester tank through the gap between the ribs 11 through the liquid return pipe 10. In this way, when kerosene is supplied into the built-in tank of the combustion device, the liquid level is detected by the liquid level sensor 2, and the information is sent to the control circuit. The control circuit turns off the submerged motor 8b based on the information sent from the liquid level sensor 2, and stops the supply of kerosene. At this time, since air flows in through the communication hole 9, the kerosene filled in the liquid injection pipe 1, liquid sending pipe 4, and liquid suction pipe 6 flows out into the storage polyester tank and the built-in tank of the combustion device, respectively.

The electric pump of the present invention has a relatively heavy power source 12, control circuit board 13, etc. concentrated on the upper part of the liquid injection pipe 1, so that the center of gravity of the storage plastic tank does not become high when refueling with kerosene. The sense of stability is not compromised. Furthermore, since the submerged motor pump 8 is installed at the bottom of the storage plastic tank, the center of gravity of the storage plastic tank can be kept low and the stability of the storage plastic tank can be increased. In particular, the smaller the amount of kerosene remaining in the storage plastic tank, the lower the center of gravity, which increases the stability of the storage plastic tank and reduces the risk of it tipping over due to small external forces such as vibrations and contact. There is no need to hold it down by hand, making handling easier and improving operability.

Next, the second embodiment shown in FIG.
1 is formed into an L-shape and is integrally provided with a branch part 22 in the horizontal direction, and a storage part 23 that stores the power supply 12 and the control circuit board 13 on the outer surface of the liquid injection pipe 21 facing the branch part 22. A part of the liquid injection pipe 21 is also used as a partition plate, and a rubber bush 17 is fitted therein. Since the structure of other parts is the same as that of the embodiment shown in FIG. 1, the same reference numerals are given and the explanation thereof will be omitted. This embodiment also provides the same effects as the first embodiment.

In the third embodiment shown in FIG. 3, a liquid return pipe 32 is integrally provided with a fitting ring 31 that connects the liquid sending pipe 4 and the liquid suction pipe 6 in a liquid-tight manner. The structure of other parts is the same as that of the first embodiment, so the same reference numerals are given and the explanation will be omitted. This embodiment also provides the same effects as the first embodiment.

In the fourth embodiment shown in FIG. 4, a liquid return pipe 42 is integrally formed by extending the tip of a liquid sending pipe 41, and this liquid sending pipe 41 is connected to a liquid suction pipe 6 in a fitting manner. The ring 43 is integrally formed with an attachment part 44 that fits into the mouth of the storage plastic tank. The structure of other parts is the same as that of the first embodiment, so the same reference numerals are given and the explanation will be omitted. In this embodiment, by forming the liquid return pipe 42 integrally with the liquid sending pipe 41, the structure can be simplified and the cost can be reduced, and the same effects as in the first embodiment can be achieved.

Note that the present invention is not limited to the above embodiments, and can be implemented with various modifications without changing the gist.

[Effects of the Invention] As explained above, according to the present invention, it is possible to provide an electric pump that is excellent in safety and operability without impairing the stability of the storage polyester tank.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of one embodiment of the present invention, FIGS. 2 to 4 are partially cutaway side views of different embodiments of the present invention, and FIGS. FIG. 6 is a side view showing different conventional electric pumps. 1, 21...liquid injection pipe, 1a...discharge port, 2...
Liquid level sensor, 3, 22... Branch, 4, 41...
...liquid sending pipe, 5,7,31,43...fitting ring, 6...liquid suction pipe, 6a...suction port, 8...submerged motor pump, 8a...impeller, 8b...liquid Middle motor, 9...Communication hole, 10, 32, 42...
Liquid return pipe, 11...rib, 12...power supply, 13...
Control circuit board, 14, 23... Storage section, 15...
Operation switch, 16...partition plate, 17...rubber button, 18, 19...cord, 44...attachment section.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A liquid injection pipe equipped with a liquid level sensor that detects the liquid level, and a storage section provided at the top of the liquid injection pipe that houses a power source, control circuit, etc. , a liquid feeding pipe connected to the liquid injection pipe; a liquid suction pipe having one end connected to the liquid feeding pipe and having a communication hole in the upper part communicating with the atmosphere; and a submerged motor installed at the bottom of the suction pipe. An electric pump characterized by comprising a pump. (2) The electric pump according to claim 1, wherein the liquid suction pipe is provided with a liquid return pipe on the outside so as to cover the communication hole. (3) The electric pump according to claim 2, wherein the liquid return pipe is integrally formed with one end of the liquid sending pipe. (4) The electric pump according to claim 1 or 2, wherein the liquid suction pipe is provided with an attachment connected to the opening of the storage container at the upper part.