JPS608506Y2 - Cable support structure for float switch in submersible pump - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cable support structure for a float switch in a submersible pump.

To explain the drawings, A is a cylindrical support externally installed on the submersible pump, and the whole or only the end thereof is cylindrical. 5 so that it can be adjusted vertically.

B is a cable clamping tool made of elastic insulating material such as rubber, which has a horizontal hole 1 for inserting the cable in its head, and a vertically split plug 2 in its neck, which is inserted from the end of the plug into the above. horizontal hole in head 1
However, the outer diameter of the stopper 2 portion should be made slightly larger than the inner diameter of the cylindrical end of the cylindrical support A, or the hole diameter of the horizontal hole 1 for cable insertion should be made to be larger than the inner diameter of the cylindrical end of the cylindrical support A. The diameter shall be slightly smaller than the outer diameter.

In use, as shown in Figure 4A, the cable 4 is inserted from the end of the plug body 2 with the notch 3 opened as shown in the opening in the same figure, and the cable 4 is led out from the outer wall of the submersible pump and the float switch 6 is attached to the tip. With the free bending portion 4' of the tethered cable 4 adjusted to an arbitrary length, the plug 2 portion of the cable clamp B is press-fitted into the cylindrical end of the cylindrical support A as shown in the figure.

If the diameter of the horizontal hole 1 for cable insertion in the cable clamping tool B is formed to be slightly smaller than the outer diameter of the cable 4, it will be pushed and expanded by the insertion of the cable 4, and the plug 2 portion will tend to expand. Pressed against the inner circumferential surface of the cylindrical end of the cylindrical support A, and
If the outer diameter of the 2 parts of the plug in the cable clamping tool B is formed to be slightly larger than the inner diameter of the cylindrical end of the cylindrical support A, the 2 parts of the plug can be press-fitted into the cylindrical end of the cylindrical support A. As a result, the hole diameter of the side hole 1 tends to shrink and comes into pressure contact with the outer periphery of the cable 4, so that the fitting portion of the cable 4 and the press-fitting portion of the plug body 2 are both maintained in a proper state.

Therefore, the cable 4 is supported at the end of the support body A with its free bending portion 4' adjusted to an arbitrary length.

The inner circumferential surface of the horizontal cable insertion hole 1 and the outer circumferential surface of the plug body 2 in the cylindrical support A are formed into an annular uneven surface 7 as shown in FIG. 5, or as shown in FIG. If it is formed into an appropriate uneven surface, such as a tooth ring-shaped uneven surface 8, the elastic action will be increased and the alignment effect with the cylindrical support and the cable will be further strengthened.

It is well known that a float switch in a submersible pump adjusts the control liquid level by changing the length of the free bending portion of the cable.

However, with this type of conventional support structure, which is performed by screwing bolts, not only is the installation and removal work complicated, but once it is used in dirty water, the screwed part may rust or dirt may stick to it. etc., the length of the bottom cable cannot be adjusted.

In the structure of this invention, the cable is inserted and connected to the cylindrical support using the elasticity of the clamping tool itself, so installation and removal work can be done easily and quickly. Additionally, there is an advantage that the length of the free bending portion of the cable can be adjusted very easily.

[Brief explanation of the drawing]

Fig. 1 is a side view of a submersible pump that supports the cable of a float switch using the structure of the invention, Fig. 2 is a cutaway front view of the main part of the cylindrical support that constitutes the structure of the invention, and Fig. 3 shows the structure of the invention. Front view of the constituting cable clamping tool, I9 in Fig. 4
9 B, C An explanatory diagram showing the cable support procedure using the inventive structure. Figure 5 shows an example in which the inner circumferential surface of the side hole and the outer circumferential surface of the plug of the cable clamp constituting the inventive structure are formed into an annular uneven surface. FIG. 6 is a front view showing an example in which the inner circumferential surface of the side hole and the outer circumferential surface of the plug body of the clamping tool are formed into tooth ring-shaped uneven surfaces. A: Cylindrical support, B: Cable clamp, 1: Horizontal hole for inserting the cable, 2:
・・・Vertically divided stopper, 3... Cut, 4...
...Cable, 4'...Free bending part, 6...
...Float switch.

Claims (1)

[Scope of utility model registration request] A cylindrical support body A is installed externally on the submersible pump, a horizontal hole 1 for inserting a cable is bored in the head part made of a resilient insulating material such as rubber, and the neck part is made into a vertically divided stopper body 2. A cable clamping tool S with a cut 3 that communicates with the horizontal hole 1 of the neck from the end of the stopper.
The cable 4 with the float switch 6 tethered to the tip thereof is inserted into the horizontal hole 1 of the cable clamp B, and the free bending part 4' is adjusted to the desired length. is press-fitted into the cylindrical end of the cylindrical support A, the fitting portion of the cable 4 and the press-fitting portion of the plug body 2 are both maintained in the correct state, so that the free bending portion 4' has a predetermined length. 1. A cable support structure for a float switch in a submersible pump, characterized in that the float switch 6 is held at a predetermined value so that the lifting/lowering width of the float switch 6 is set to a predetermined value as the water level increases or decreases.