JPH11343992A - Ladder device in manhole for installation of submerged pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate use of protrusive steps on the wall surface of a manhole and allow easy and safe operations within the manhole at the time of pulling up a pump. SOLUTION: This ladder device for a manhole is configured so that guide hooks 7, 7 attached to a submerged pump P are engaged with guide rails 6, 6 for elevation and sinking of the pump and a discharge piping 5 is installed upright in a position nearer the wall surface of the manhole than the guide rails 6, 6. The ends of each step rod 8 are fixed to the wall surface of the manhole 1 so that the step rod 8...8 are positioned horizontally from above to below inside the manhole 1 between the guide rails 6, 6 and the discharge piping 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole tapping device provided with a submersible pump.

[0002]

2. Description of the Related Art As is well known, in a manhole in which a detachable submersible pump is installed, as shown in FIG.
Step 80 for workers to go up and down during installation and inspection
A # 80 protrudes from the upper part to the lower part of the wall surface, and the guide rail 60 for raising and lowering the pump and the discharge pipe 50 guided from the detachable bend 30 are connected to the above-mentioned step 8.
It is provided close to the wall surface in the direction opposite to the protruding side of 0 ‥‥ 80.

As described above, since the front and rear diameters in the narrow manhole are further narrowed by the projections of the steps 80 to 80, the size of the pump to be installed is restricted, and Work inside the manhole when the pump is lifted becomes extremely difficult, and it is often the case that the worker hits his / her hip on the steps 80-80 projecting behind and is injured.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a manhole in which a detachable submersible pump is installed, so that it is not necessary to project a step on the wall of the manhole as in the prior art. Another object of the present invention is to provide a ramp device that can be performed safely.

[0005]

In the manhole tapping device according to the present invention, two guide rails for lifting and lowering are paired in parallel in the required number of manholes in accordance with the number of submersible pumps installed. A guide hook, which is attached to the guide rail and is led out in the opening direction of the discharge port and has its leading end extended to both sides, is engaged from the inside or outside of the guide rail, and the pump discharge port is detachably connected. The discharge pipe led from the desorption bend to be attached is erected at a position closer to the wall of the manhole than the erected position of the guide rail, and the upper part of the manhole between these guide rails and the discharge pipe is provided. A plurality of foot-hanging rods were horizontally arranged from below to below, and both end portions of these foot-holding rods were fixed to the wall surfaces of the manhole. Since the worker can move up and down by this foot-holding rod, it is not necessary to provide a step on the manhole wall.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments will be described below with reference to the drawings.

1 is a manhole, 2 is an inflow pipe of sewage, P is a detachable submersible pump submerged in the manhole 1, 3 is a desorption bend for detachably connecting a discharge port 4 of the submersible pump P, 5 is a desorption bend A discharge pipe which is guided upward from the bend 3 and erected along the wall surface of the manhole 1, and is erected at a position closer to the wall surface of the manhole forward than the erected position of a guide rail 6 to be described later. Are drawn out from the wall surface of the manhole 1 and communicate with a predetermined drainage channel. Numeral 6 is a guide rail for elevating two pairs.
For example, if the number of submersible pumps submerged in the manhole 1 is two, and if the number of submersible pumps is two, four submersible pumps are used. 5 at the same position. 7, 7 are guide hooks which are attached to the submersible pump P and are led out in the opening direction of the discharge port 4 and the leading ends are extended to both sides. Engage from inside or outside. Reference numerals 8 8 denote horizontally disposed foot hanging rods between the guide rails 6, 6 and the discharge pipe 5 from the upper part to the lower part in the manhole 1, and both ends of each of the foot rods 8 ‥‥ 8. Parts 8e, 8e
Are fixed on the wall surface of the manhole 1, respectively. The trapping device is configured at a position close to the standing position of the discharge pipe 5 by the plurality of horizontally arranged foot hanging rods 8 # 8. There is no need to provide a step on the manhole wall as in the related art.

[0008]

According to the present invention, in the manhole 1 in which the detachable submersible pump P is installed, the step which has been conventionally provided on the wall surface opposite to the standing position of the discharge pipe 5 and the guide rail 6 is provided. Since there is no such protrusion, if the manhole diameter is the same, a pump one rank higher than the conventional one can be installed. Then, there is an advantage that the work in the manhole 1 at the time of raising the pump can be easily and safely performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part of a manhole provided with a tapping device of the present invention.

FIG. 2 is a cross-sectional plan view of a main part of a manhole provided with the tapping device of the present invention.

FIG. 3 is a vertical sectional side view of a main part of a manhole in which a conventional step is provided on a wall surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 3 Detachable bend 4 Pump discharge port 5 Discharge piping 6 Guide rail 7 Guide hook 8 Foot rod P Submersible pump

Claims (1)

[Claims] 1. A pair of ascending and descending guide rails are arranged in parallel in a required number of manholes corresponding to the number of submersible pumps installed, and are attached to the submersible pump and led out in the opening direction of the discharge port. A discharge pipe led from a detachable bend that engages a guide hook with an extension end protruding to both sides from the inside or outside of the guide rail and connects a pump discharge port so that the pump discharge port can be detached from the guide rail. It is erected closer to the manhole wall than the erected position of the rail, and a plurality of foot-holding rods are arranged horizontally from the upper part to the lower part in the manhole between these guide rails and the discharge pipe. A tapping device for a submersible pump-installed manhole, wherein both end portions of the foot-holding rod are fixed to the wall surface of the manhole.