JPS5841244Y2 - well cover - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improved well cap.

For deep wells, etc., as shown in Fig. 1, a pumping pipe C is attached to a lid that closes the upper end opening of the well casing a, and a pump (not shown) is operated by closing the lid through this pumping pipe C. It is configured to be suspended.

In the figure, d is a through hole through which a pump cable (not shown) is inserted.

Generally, the lid is placed only on the upper end of the well casing a, and the lower end surface is conventionally formed flat, so the lid may shift due to the reaction that occurs when the pump is started or stopped. Therefore, there was a problem that the cable could be damaged by hitting the well casing a, which would interfere with the normal operation of the pump.

In addition, in order to improve this difficulty, methods were used to fix the cover with foundation bolts, etc., but this required a lot of trouble during installation, such as the need to position the cable so that it did not hit the well casing a. It required

The present invention was developed under the above circumstances, and its purpose is to provide a well that is simple and easy to install, yet is securely held in place, and therefore does not cause cable damage due to misalignment. The purpose is to provide a cover.

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIG. 2, a lid 3 is placed on the upper opening edge 2 of the well casing 1 so as to be openable and closable.

The lid 3 is provided with a ring-shaped protrusion 4 that protrudes downward and continues in the circumferential direction.

This protrusion 4 has an inner diameter slightly larger than the outer diameter of the opening edge 2, or has an outer diameter slightly smaller than the inner diameter of the opening edge 2, as indicated by the chain line 1a), so that it can be freely fitted into and removed from the opening edge 2. shaped to fit together.

Furthermore, a lift pipe 5 is attached to the lid 3, which penetrates in the vertical direction, almost in the same way as in the conventional device.
For example, a deep well pump (not shown) is suspended via the .

Further, the lid 3 has a through hole 6 through which a pump cable (not shown) is inserted.

The lower end of the through hole 6 is spaced inward from the inner wall surface of the protrusion 4 by at least a distance corresponding to the thickness of the upper opening edge 2 of the well casing 1.

According to the above configuration, the lid 3 is placed above the upper opening edge 2 of the well casing 1 while the pump is suspended via the pumping pipe 5 attached to the lid 3 and the pump cable is inserted through the through hole 6. Since it is only necessary to place the opening edge 2 and the protrusion 4 into each other, the installation work is simple and easy.

In addition, since the opening edge 2 and the protrusion 4 are fitted into each other, the lid 3 is moved against the well casing 1 by reaction when the pump is started or stopped, or by normal lateral external force that can be expected. There is no possibility of lateral slippage.

Furthermore, since the lower end of the through hole 6 opens inwardly at a distance corresponding to the thickness of the opening edge 2 from the inner wall surface of the protrusion 4, the lid 3 does not shift laterally. Therefore, the cable inserted through the through hole 6 will not be damaged by hitting the well casing 1.

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, as shown in FIG.
A combination that provides an optimal fitting state may be selected depending on the outer diameter or inner diameter of a and 2 b, thereby making it possible to reduce the number of types of lids.

Further, the projections 4, 7, etc. may be discontinuous in the circumferential direction if necessary, and a plurality of stepped portions 8 may be provided.

In addition, various modifications and applications are possible within the scope of the gist of the present invention.

As described above, the present invention provides a ring-shaped protrusion that protrudes from the lid to fit into the upper end opening of the well casing, and also extends the lower end of the casing insertion through hole from the inner wall surface of the protrusion to the opening edge. Since the lid is spaced inward by a distance corresponding to the thickness, it is only necessary to place the lid on the edge of the opening and fit it with the protrusion, making installation simple and easy. will not hit the well casing and cause damage.

Further, by providing a stepped portion on the protrusion, it can be adapted to any of a plurality of types of well casings having different diameters, and there is an effect that the number of types of lids can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view illustrating a conventional device, FIG. 2 is a cross-sectional view showing an embodiment of the present invention, and FIG. 3 is an explanatory view showing a modification of the main part. 1.1 a, 1 b...well casing, 2.
...Opening edge, 3...Lid, 4,7...
...Protrusion, 6...Through hole, 8...Step.

Claims (2)

[Scope of utility model registration request] (1) In a well casing that has a through hole through which the pump cable is inserted and is placed on the upper opening edge of the well casing,
A ring-shaped protrusion that fits into the opening edge is protruded, and the lower end of the through hole is spaced inward from the inner wall surface of the protrusion by at least a distance corresponding to the thickness of the opening edge. A well cover featuring: (2) The well cover according to claim 1, wherein the projection has stepped portions having mutually different diameters.