JPH041475Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dangerous substance detector for detecting leakage of gas oil, etc. stored at a gas station.

Conventionally, gas stations store oil and gas in underground oil and gas tanks, so they are equipped with detectors to detect oil and gas leaks. The disadvantage of this detector is that it consists of a detection tube, a support tube, and a cap, and the tip of the detection tube is buried near an oil tank or gas tank, and the head is supported by the support tube. The cap is attached to the ground surface and the cap is installed horizontally on the ground surface, but since the support tube is fixed and difficult to move up and down, it is very difficult to align it with the ground surface, and the installation work is also inefficient. It was spot on.

This invention consists of a detection tube, a support tube that fits over the head of the detection tube, and a cap that fits into the top of the support tube, and a spring-biased holding mechanism is provided in the support tube. The holding mechanism is composed of a spring material bent into a dogleg shape, with the upper half of the dogleg shape facing each other as a support piece, and the bending point is positioned below the center of the support tube. At the same time, the distance between the bending points is made narrower than the diameter of the head of the detection tube, and the head of the detection tube is sandwiched between the bending points, and the support tube is configured to be freely adjustable up and down, so that it is connected to the ground surface. It is an object of the present invention to provide a dangerous substance detection tube for a gas station that allows easy level adjustment with the upper surface of a support tube.

An example of this invention will be described in detail based on the drawings.
Reference numeral A denotes a dangerous substance detector, which is composed of a rod-shaped detection tube 1, a support tube 3, and a cap 4.

The detection tube 1 has a lower part 6 formed into a sharp wedge shape to facilitate driving into the ground, and a head 2 inserted into a support tube 3.

The support tube 3 has a socket 5 in the upper part into which the cap 4 is fitted, and a support piece in the lower part that can freely adjust up and down the detection tube 1 by a spring bias.

1 and 2 show an embodiment of the vertical movement adjustment mechanism of the support tube 3, and FIG. 2 shows an example of a mechanism for adjusting the vertical movement of the support tube 3. FIG. The support pieces 7a and 7b are arranged oppositely, and the distance between the bending points 8a and 8b is formed to be narrower than the diameter of the head 2 of the detection tube 1.
The support tube 3 is lowered and fitted into the head 2 of the detection tube 1, and the elastic force of the support pieces 7a and 7b moves the support tube 3 up and down on the detection tube 1 to support and fix it. Furthermore, the bending points 8a and 8b are configured to be located below the center of the support tube 3, and when supporting the support tube 3 at the head of the detection tube 1, the support tube 3 is prevented from swinging from side to side. Since the fine adjustment is made using the clamping portions of the lower bending points 8a and 8b as fulcrums, the distortion of the left and right position of the head of the support tube 3 can also be adjusted by slight movements.

In the figure, S indicates a sensing hole provided in the peripheral wall of the sensing tube 1. T is the underground tank and G is the paved surface above ground.

The embodiment of this invention is constructed as described above, and the detection tube 1 is driven into the ground, and while soil is piled up, a dogleg-shaped spring member is applied to the head of the detection tube 1. Push in the support tube 3 with the adjustment mechanism attached, and move the support tube 3 up and down while checking the level between the ground surface and the top surface of the cap 4 fitted on the top surface of the support tube 3 until the level with the ground surface is reached. If the vertical movement of the support tube 3 is stopped at this point, the support tube 3 will be supported in a fixed state on the detection tube 1, so there is no need for a special device to fix the support tube 3 to the detection tube 1. I'll try it.

In particular, the holding mechanism is made of a spring material bent into a dogleg shape, the upper half of the dogleg shape is placed oppositely as a support piece, and the distance between the bending points is narrower than the diameter of the detection tube head. In addition, the detection tube head is securely clamped and biased between the bending points for easy adjustment, and is also bent in a dogleg shape, so the lower half of the tube expands downward. This makes it easy to fit the support tube onto the detection tube head, and the bending point of the dogleg-shaped spring material is located below the center of the support tube. Therefore, when adjusting the horizontal position (left-right position) of the support cylinder, it is necessary to swing the support cylinder left and right around the bending point and place it in the correct position. Light adjustments can be made around the bending point by applying a small amount of force laterally, and this occurs because the distance between the bending point and the head of the support tube is long. It is action and effect.

Therefore, according to this invention, a dogleg-shaped spring member is provided inside the support tube, and the bending point is located below the center, so that the distance between the bending point and the support tube head is reduced. However, it becomes longer as the bending point is lower,
Not only can the vertical position of the support tube be adjusted, but also the operation of swinging it from side to side to adjust it to an appropriate position can be easily performed.Therefore, this has the effect of making it possible to accurately and easily bury the detection tube at a gas station.

[Brief explanation of the drawing]

Fig. 1 is a front view of the hazardous substance detector of this invention, Fig. 2 is a sectional view showing an embodiment of the vertical adjustment mechanism of the support tube 3 of this invention, and Fig. 3 is an explanation of the usage state. It is a diagram. 1...Detection tube, 3...Support tube, 4...Cap, 7a, 7b, 8a, 8b...Support piece made of elastic material.

Claims (1)

[Scope of utility model registration request] It consists of a detection tube 1, a support tube 3 fitted into the head 2 of the detection tube 1, and a cap 4 fitted into the upper part of the support tube 3, and a spring-biased holding mechanism is provided in the support tube 3. Moreover, the holding mechanism is made of a spring material bent into a dogleg shape, and the upper half of the dogleg shape is provided as support pieces 7a and 7b, and the bending points 8a and 8b are connected to the support tube 3. The bending points 8a and 8b are formed to be narrower than the diameter of the head 2 of the detection tube 1.
The head 2 of the detection tube 1 is held between a and 8b, and the support tube 3 is configured to be adjustable up and down, making it easy to adjust the level between the ground surface and the top of the support tube 3. Object detection tube.