JP3302005B2 - Connection equipment for electrical equipment for septic tanks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric equipment incorporated in a septic tank, for example, a submersible pump, a water level sensor,
Alternatively, the present invention relates to a connection device such as a phosphorus removal unit.

[0002]

2. Description of the Related Art Conventionally, in a septic tank incorporating electric equipment such as a submersible pump and a water level sensor, electric wiring work for the equipment is performed according to the following procedure. (1) First, a relay box for wiring is attached to the upper part of the septic tank which can be reached from the manhole. (2) Pipe conduits from the position where the relay box is attached to the control panel attached to the building. Also,
(3) The electric cables from the electric devices set in the tank are drawn into the junction box. (4) Another electric cable is inserted into the conduit and connected to the control panel, and the base end of the electric cable is connected to the electric cables of the electric devices in the relay box.

[0003] The applicant of the present application has filed Japanese Patent Application No.
No. 62377, which discloses a prior art of "a method for removing phosphorus in sewage treatment and an aerobic treatment tank provided with a metal electrode for removing phosphorus". It becomes necessary to incorporate about two or three phosphorus removal units into the biological filtration tank.

[0004] Further, a pair of metal electrode plates (iron plate or aluminum plate) of the yin and yang constituting the phosphorus removal unit are:
The metal ions are eluted by energization and gradually consumed. Specifically, it will be consumed in about 4 to 6 months,
In order to replace the electrode plate, it is necessary to lift the phosphorus removal unit out of the tank from the manhole and take it out, and replace it with a new electrode plate. In addition, when electrical equipment such as the phosphorus removal unit, the submersible pump, and the water level sensor breaks down, the equipment must be replaced.

[0005]

Therefore, in the above-mentioned replacement work, every time the electric equipment is pulled out of the tank from the manhole, a surplus portion of the electric cord wound and supported immediately below the manhole is removed. It is irrational and inefficient to wind up and bundle excess electric cords when pulling out or re-installing electric equipment in the tank.

In the case of the above-described conventional connection structure, an electric cable is connected inside the relay box.
When the diameter of the manhole is small, there is a problem in the connection workability. Also, when replacing electrical equipment,
It is necessary to open the junction box, cut the electric cables connected inside, and reconnect and reconnect the electric cables of the replaced equipment to the internal connection terminals of the junction box. There is a problem with sex. This poses a further problem when electric appliances are incorporated into a small household septic tank because the manhole diameter is small.
In addition, when a plurality of phosphorus removal units are incorporated in a septic tank, the frequency of replacement of the pair of the negative and positive electrode plates increases, and therefore, it is required to simplify the work of connecting the electric cables involved in the replacement.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an electric wiring which is rational in connecting and wiring electric equipment incorporated in a septic tank and an outdoor power cable, and which is excellent in work efficiency in maintenance and management. In order to cope with the problem described above, a relay box is mounted on the upper part in the tank, and the relay box is provided with a waterproof connector.

According to the first aspect of the present invention, a relay box for connecting a waterproof connector of an electric cable can be removably fitted to a fixture fixedly provided in an upper portion of the septic tank. This allows the relay box to remove the waterproof connectors of the electric cables connected to the plurality of electric devices from the fixtures and pull them out of the septic tank with the respective waterproof connectors still connected. Therefore, when inspecting or replacing electric equipment or when newly installing electric equipment, it is possible to connect and disconnect such electric cables to and from the junction box very easily and efficiently. And
As described in claim 2, the relay box is preferably mounted on the inner wall surface of the manhole.

According to a third aspect of the present invention, the waterproof connector at the end of the electric cable connected to the phosphorus removing unit, the submersible pump, the water level sensor, and the like is fitted into the waterproof connector of the relay box. Thereby, the phosphorus removal unit, the submersible pump, the water level sensor, and the like can be easily pulled out of the tank and removed, and inspection and maintenance and maintenance such as equipment replacement can be easily performed.

According to a fourth aspect of the present invention, the phosphorus removing unit has a pair of negative and positive electrode plates suspended and fixed to the holder at an interval, and a waterproof connector at an end of the electric cable connected to the cathode side and the anode side. , To be fitted into the waterproof connector of the relay box. For this reason, especially when a plurality of sets of phosphorus removal units are incorporated in the septic tank, the work efficiency of maintenance management such as equipment replacement work can be more remarkably improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the following, an embodiment of the present invention will be described. Reference numeral 1 denotes a fitting made of synthetic resin, which is an inner wall surface 2 of a manhole M in a septic tank S, a raised portion thereof, or a septic tank S. At the upper end of the partition wall which partitions the inside of the mounting fixture, it is fixed to the upper part of the inside of the tank within a range that can be reached from the manhole M, and guides 3 are formed at both left and right positions on the front surface of the fixture 1.

Reference numeral 4 denotes a junction box made of synthetic resin which is completely waterproof and formed in a hermetically sealed structure. A guide plate 5 is formed on the back of the junction box, and an internal terminal of the junction box 4 is provided with the box. Before sealing the base 4, the base end of the power supply cable 6 drawn out of the tank is connected in advance.

Reference numeral 7 denotes a male waterproof connector, which is located at the upper and lower positions (or left and right positions) on the front surface of the relay box 4.
About 3 ports are formed. Specifically, the septic tank S is 5
In the case of about eight tanks, two ports are formed, and in the case of ten tanks, three ports are formed.

Reference numeral 8 denotes an electric cable of electric equipment to be incorporated in the septic tank S, and a female waterproof connector 9 is attached to a distal end of the electric cable.

[0015] Therefore, the electric equipment is disclosed in Japanese Patent Application Laid-Open No. 2000-2000.
-Phosphorus removal device (hereinafter referred to as phosphorus removal unit U) incorporated in the biological filtration tank C having a carrier flow structure in the septic tank S described in JP-A-5779, as shown in the specification and drawings of Japanese Patent Application No. 11-262377. Is described.

Reference numeral 10 denotes a synthetic resin holder provided with a handle 11, and a pair of yin-yang electrode plates 1
2A and 12B are formed so as to hang down at an interval, and the upper ends thereof are fastened and fixed by fixing bolts 13 (a screw may be used). In addition, the fixing bolt 13 is used for the electrode plates 12A, 12B.
Can also serve as the connection terminal. At this time, the electrode plate 1
A conductive metal plate such as an iron plate or an aluminum plate is adopted as 2A and 12B. In the following description, a case will be described in which a pair of anion-positive iron electrode plates 12A and 12B are used.

Therefore, the phosphorus removing unit U includes a pair of yin-yang iron electrode plates 12A, 12B suspended and fixed to the holder 10.
And an electrical cable 8 connected to one of the cathode side 12A and the anode side 12B, and a waterproof connector 9 formed at the end thereof. Reference numeral 14 denotes a locking portion formed with a step at both left and right positions of the holder 10.

As shown in FIG. 2, the insertion openings 16 are provided at two positions on the left and right sides of the upper net 15 in the biological filtration tank C having the carrier flow structure, and at three positions on the left and right sides and at the center thereof. The phosphorus removing unit U is dropped into the insertion opening 16 from above vertically, and the engaging portion 14 of the holder 10 is hooked on the front and rear edges of the insertion opening 16. On the other hand, a manhole M formed in the ceiling of the biological filtration tank C has an opening.
When the septic tank S is manufactured, the relay box 4
Is fixed in advance.

Therefore, when the septic tank S is installed, the power cable 6 of the relay box 4 is inserted into a conduit (not shown) buried outside the tank, and its tip is attached to the outer wall of the building or the like. It is pulled out to the board 17 and connected and wired. The power cable 18 of the control panel 17 is also connected to a waterproof outlet 19 attached to the outer wall of the building. Then, the relay box 4 is fitted into the fixture 1 provided on the inner wall surface 2 of the manhole M, and the waterproof connector 9 at the end of the electric cable 8 in the phosphorus removal unit U is fitted into the waterproof connector 7 of the relay box 4. .

When the energization of the phosphorus removal unit U of the biological filtration tank C in the purification tank S is started, a current flows through the pair of the yin and yang iron electrode plates 12A and 12B immersed in the secondary treatment water. Divalent metal iron ions gradually elute from the iron electrode plate 12B on one anode side. This divalent iron ion is
Oxidized by dissolved oxygen in the water and converted to trivalent iron ions, and then reacts with phosphate ions in the water to form a precipitate of iron phosphate, thereby removing phosphorus contained in the secondary treatment water. You.

In the above case, the case where the waterproof connector 9 of the phosphorus removal unit U is connected to the waterproof connector 7 of the relay box 4 has been described. Even when a sensor or the like is incorporated, the waterproof connector (not shown) at the end of the electric cable can be easily connected to the waterproof connector 7 of the relay box 4 of the present invention.

[0022]

As described above, according to the present invention, in order to connect and wire the electric equipment incorporated in the septic tank and the outdoor power cable, a relay box is attached to the upper part of the tank and a waterproof connector is attached to the relay box. Since it was a connection device for the electric equipment for the septic tank provided, the electric equipment could be taken out of the tank,
Again, maintenance work on electrical equipment, such as when it is installed in a tank, will be simplified.

In particular, once the wiring work is performed by the electrician, the septic tank manager can easily and easily perform the unit replacement work for the equipment and the like, thereby reducing the maintenance and management costs. Significantly reduced.

Further, as described in claim 2, the mounting fixture is fixed to the upper part in the tank, preferably to the inner wall surface of the manhole, and the relay box is removably fitted to the mounting fixture. Installation and removal work of relay box,
Various effects such as the inspection and replacement work can be easily performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a fixture fixed to an inner wall surface of a manhole and a relay box fitted and supported by the fixture.

FIG. 2 is a schematic perspective view showing a state in which a phosphorus removal unit is dropped into an upper net of a biological filtration tank in a septic tank and is set, and a fixture of a relay box is fixed to an inner wall surface of a manhole.

FIG. 3 is a schematic perspective view showing a phosphorus removing unit and a relay box configured in a tank of a septic tank, and a control panel and a waterproof outlet mounted outside the tank.

[Explanation of symbols]

 S Septic tank M Manhole U Phosphorus removal unit 1 Fixture 2 Inner wall surface 3 Guide 4 Relay box 5 Guide plate 6, 18 Power cable 7, 9 Waterproof connector 8 Electric cable 10 Holder 11 Handle 12A, 12B Electrode plate 13 Fixing bolt 14 Lock Part 15 Upper net 16 Insertion port 17 Control panel 19 Waterproof outlet

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Claims (4)

(57) [Claims] An apparatus for connecting an electric cable connected to electric equipment incorporated in a septic tank to a power cable outside the tank, wherein an electric cable is attached to a fixture fixed to an upper portion in the septic tank. A junction box for connecting a waterproof connector according to any one of claims 1 to 3, wherein the junction box is detachably fitted. 2. The connection device for electric equipment for septic tanks according to claim 1, wherein the relay box is attached to an inner wall surface of the manhole. 3. The electric equipment for a septic tank according to claim 1, wherein a waterproof connector at an end of an electric cable connected to a phosphorus removing unit, a submersible pump, a water level sensor, or the like is fitted into the waterproof connector of the relay box. Connecting device. 4. A phosphorus removing unit comprising: a pair of yin and yang electrode plates suspended and fixed to a holder at intervals.
The connection device for electric equipment for septic tanks according to claim 3, wherein the waterproof connector at the end of the electric cable connected to the cathode side and the anode side is fitted into the waterproof connector of the relay box.