JPH11343990A - 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, facilitate execution of works with no specification about the piping directionality, and allow easy and safe operations in the manhole at the time of pulling up a pump. SOLUTION: This ladder device in a manhole is configured so that a plurality of horizontal step rods 8...8 are tied at a certain spacing in the verticaly direction using tying members 9, 9 dangled from above the manhole 1 between guide rails 6, 6 for elevation and sinking of a submerged pump installed upright in the manhole 1 and equipped at the ends with engaging pieces 7b , 7b , to be engaged with the guide rails 6, 6.

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. In addition, inflow pipe 2
The introduction position of 0 and the lead-out position of the discharge pipe 50 must also be set in such a way as to detour in a direction avoiding steps 80 to 80, which greatly imposes restrictions on construction.

[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, and the construction is good regardless of the direction of the piping. It is an object of the present invention to provide a tapping device that can easily and safely perform work inside a manhole when lifting a pump.

[0005]

DETAILED DESCRIPTION OF THE INVENTION In the manhole tapping device according to the present invention, two guide rails for ascending and descending are arranged in the required number of manholes in parallel with the number of submersible pumps to be installed. A guide hook, which is attached and is led out in the opening direction of the discharge port and has its leading end protruding to both sides, is engaged from the inside or outside of the guide rail, and a manhole is provided between two adjacent guide rails. A plurality of foot hanging rods are connected horizontally and vertically at regular intervals by a connecting member guided from above, and engaging members are attached to both ends thereof to engage with the guide rail.

[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 It is a discharge pipe which is guided upward from the bend 3 and is provided upright along the wall surface of the manhole 1, and the upper end thereof is led out from the wall surface of the manhole 1 and communicates with a predetermined drainage channel. Numeral 6 is a guide rail for ascending and descending two pairs, for example, two submersible pumps submerged in the manhole 1 and four submersible pumps if there are two submersible pumps. The required number of pumps P are arranged at a position close to the discharge pipe 5 in accordance with the number of pumps P installed. 7a, 7a 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 have their leading ends extended to both sides.
7a is engaged from inside or outside of the guide rails 6,6. 8 ‥‥ 8 is a foot rod, and two adjacent
Between the guide rails 6, 6, connecting members 9, 9 guided from above the manhole 1 are horizontally and vertically connected at regular intervals, and engaging members 7 b, provided at both ends thereof.
7b is locked to the guide rails 6,6. It is to be noted that a chain is suitable for the connecting members 9, 9 for connecting the foot hanging rods 8 # 8, but a string or a rod may be used.

[0008]

When the submersible pump P is to be lifted and the work is performed in the manhole, the connecting members 9 and 9 are inserted into the manhole with the engaging members 7b and 7b at both ends engaged with the guide rails 6 and 6, respectively. If it is guided down and the upper end part is locked on the manhole, the foot hanging rods 8 arranged at regular intervals in the vertical direction
By # 8, a tapping device extending upward in the manhole 1 is formed. The operator can get down into the manhole 1 using this tapping device,
There is no need to provide a conventional step on the wall surface of the manhole opposite to the position where the discharge pipe 5 stands. When the tapping device is not used, the link members 9, 9 are manually manipulated so that the foot hanging rods 8 # 8 are converged to an upper portion in the manhole 1, or withdrawn from the manhole 1.

[0009]

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 direction in which the discharge pipe 5 and the guide rail 6 are erected. 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. Further, the introduction position of the inflow pipe 2 and the lead-out position of the discharge pipe 5 can be set in any direction without restriction, which is extremely convenient in terms of construction. Furthermore, when the ramp device is not used, it can be lifted and withdrawn, so that there is an effect that unauthorized entry into the manhole can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part of a manhole to which the present invention is applied, showing a state in which a tapping device between guide rails is pulled up when a submersible pump is installed.

FIG. 2 is a vertical sectional side view of a main part of a manhole to which the present invention is applied, showing a state in which a tapping device is formed between guide rails when a submersible pump is pulled up.

FIG. 3 is a longitudinal sectional front view of a main part of a manhole to which the present invention is applied, and shows a state in which a tapping device is configured between guide rails when a submersible pump is pulled up.

FIG. 4 is a longitudinal sectional side view of a main part of a conventional manhole,
This shows a state in which a step for raising and lowering a worker is protrudingly provided on a wall surface of a manhole in the direction in which a discharge pipe and a pump elevating guide rail are erected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 4 Pump discharge port 6 Guide rail 7a Guide hook 7b Engagement body 8 Foot hanging rod 9 Connecting member

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 plurality of footrests are connected by a connecting member which is guided from the inside or outside of the guide rail by engaging a guide hook having an extension end protruding to both sides from the inside or outside of the guide rail. A tapping device for a submersible pump installation manhole, wherein a rod is connected horizontally and vertically at regular intervals, and engagement members are attached to both ends thereof to engage with the guide rail.