JPH082593Y2 - Sample collector for gas detection - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention is designed to detect a gas at a place to be detected by a pump incorporated in a gas detecting device.
The present invention relates to a sample collector for a so-called gas collection type gas detection device that sucks into the inside of the device.

[0002]

2. Description of the Related Art Conventionally, when entering a manhole or underground cavern, the presence or absence of gas, especially toxic gas, has always been detected to ensure the safety of the human body. Water is often present, and there is a risk that the accumulated water will be sucked together with the sample at the time of detection to damage the detection equipment. As a method for preventing this, for example, Japanese Patent Application No.
No. 25253 (Japanese Patent Laid-Open No. 53-50793).

However, in the case of the conventional method, water absorption is unavoidable when the sample collection port is put into the reservoir water in a suction state or when the sample collection port is tumbled in the reservoir water. Therefore, an object of the present invention is to provide a gas sampling type gas detector capable of effectively collecting only gas without absorbing water even if the sample collector falls in the accumulated water and the sample collecting port is immersed in the accumulated water. It is to provide a sample collector.

That is, according to the present invention, a pipe port is formed at a central position of a side wall of a cylindrical tubular body so as to guide the gas inside the tubular body to the outside through a pipe, and both ends of the tubular body are formed. The sample collector for gas detection has a watertight and breathable sheet that is gas-tight but not water-tight.

[0003]

The gas detecting sample collector formed of the tubular body and the watertight / air-permeable sheet as described above can function as a hollow container for water and can be constructed so as not to be submerged unless external force is applied. Moreover, since both ends of the cylinder are breathable, a part of the sheet must be exposed to the atmosphere even if it floats horizontally on the water surface or even if one end of the cylinder is completely submerged. The gas can be collected from there and sent to the gas detection device. That is, in the state where the pipe port of the sample collector for gas detection having a cylindrical shape is connected to the suction pump of the gas detection device through the pipe, the sample collector is put in the manhole of the underground cave where the sample collector is installed, and the manhole When there is accumulated water at the bottom, the sample collector usually floats on the accumulated water with the pipe port facing upwards with the tube lying sideways.In that case, most of the watertight / breathable sheets at both ends of the cylinder are Since it is exposed to the atmosphere, only the gas in the manhole is collected from the sheet portion of the sample collector, and it is possible to reliably detect the gas necessary for ensuring safety, especially the presence or absence of toxic gas.

[0004]

[Effect of the Invention] As a result, the present invention effectively collects only gas without absorbing water even if the sample collector falls in the reservoir water and the sample inlet is submerged in the reservoir water. There is an effect that the safety of the worker can be surely maintained.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the construction of one embodiment of the present invention will be described with reference to the drawings. Cylindrical cylinder 1 made of transparent plastic
A pipe port 3 is formed at the center position of the side wall of the cylinder 1 for discharging the gas in the cylinder 1 to the outside through a pipe 2. At both ends of the cylinder 1, a watertight / air-permeable sheet that allows gas to pass through instead of water. 4 is hermetically covered and attached to the end of the tubular body 1 via a cap 5 which can be tightly fitted, and the cap 5 is provided with a watertight and breathable sheet 4 to vent the atmosphere and the interior of the tubular body 1. A large number of slit-shaped vent holes 6 are formed so as to enable it.

Next, the operation of this embodiment will be described.
Since the gas-detecting sample collector 7 configured as described above is basically formed by the cylindrical body 1 and the watertight / air-permeable sheet 4, it acts as a hollow container for water and applies an external force. Unless it is submerged unless it is submerged in water, and because both ends of the tubular body 1 are breathable, even if they are floating horizontally on the water surface, or even if one end of the tubular body 1 is completely submerged. A part of the sheet 4 is always exposed to the atmosphere, from which gas can be collected and sent to the gas detection device. That is, in a state where the pipe port 3 of the cylindrical gas sample collector 7 for gas detection is connected to the intake pump of the gas detection device through the pipe, the sample collector 7 is put in the manhole of the underground cavern where it is installed. When there is accumulated water at the bottom of the manhole, the sample collector 7 normally floats on the accumulated water with the pipe port 3 facing upward and the cylinder 1 is laid sideways. Since most of the breathable sheet 4 is exposed to the atmosphere, the gas in the manhole is collected only from the slit-shaped vents 6 of the caps 5 at both ends of the sample collector 7 through the sheet 4 portion, It is possible to reliably detect the presence or absence of gas, especially toxic gas, necessary for ensuring the safety of workers entering the manhole or the like.

The watertight / breathable sheet 4 is attached to the cylindrical body 1 in a hermetically sealed state, in addition to using the cap 5, attaching the watertight / breathable sheet 4 into a cap shape with an adhesive, or optionally. It can be replaced with a strap, a plastic band, or the like.

[Brief description of drawings]

FIG. 1 is a perspective view of a gas-detecting sample collector 7.

FIG. 2 is a front view of a gas-detecting sample collector 7.

FIG. 3 is a side view of a gas-detecting sample collector 7.

[Explanation of symbols]

 1 Cylindrical body 2 Tube 3 Piping port 4 Watertight / breathable sheet 5 Cap 6 Slit-shaped ventilation port 7 Gas sample collector

Claims (1)

[Scope of utility model registration request] 1. A pipe port for leading the gas in the cylinder to the outside through a pipe is formed at the center of the side wall of the cylinder.
A sample collector for gas detection, characterized in that a watertight / air-permeable sheet that allows gas to pass therethrough is sealed and attached to both ends of the cylindrical body in a sealed state.