JPH0528510Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sample suction mat for continuous movement on a road surface, and particularly to a sample suction mat for continuous movement on a road surface for use in a device for detecting leaked gas.

Conventionally, this type of suction mat was developed in 1973.
There is a type shown in Publication No. 13719, but this type has a rough bottom surface of the pine and has one sample suction port in the center of the hollow, so it cannot be used for gas conduits etc. buried underground. When the suction mat is continuously swept over the ground (road surface) to measure city gas leaking from the ground, the suction mat does not adhere well to the road surface and is easily affected by wind, and measurement errors may occur due to unevenness of the road surface. The problem is that it is difficult to work in narrow spaces such as under parked cars or in alleys.

The purpose of the present invention is to provide a sample suction mat for continuous movement on the road surface that improves adhesion to the road surface, is less affected by wind, and reduces friction with the road surface to improve workability during movement. be.

The sample suction mat for continuous movement on road surfaces of the present invention includes a gas suction detection mechanism, a gas suction conduit connected to this mechanism, a filter inserted in the suction conduit, and a mat main body having a smooth lower surface such as silicone rubber. A rectangular upward depression extending perpendicular to the direction of movement of the mat main body, sample suction ports formed at both ends of this depression, and a connector for connecting these two sample suction ports to the gas suction conduit. It is characterized by consisting of.

Embodiments of the present invention will be described below with reference to the drawings. In Figures 1 and 2, 1 is the suction mat main body, 2 is a wheel for moving the mat that is connected to the end of the main mat main body 1 with its central axis, 3 is its handle, 4 is a handle, and 5 is a pump built-in gas detector. 6 is filter 1
In the present invention, the mat body 1 is formed of a material with a smooth lower surface such as silicone rubber, and the mat body 1 is moved near the other end of the mat body 1. A rectangular upward depression 7 extending in a direction perpendicular to the direction is formed, and sample suction ports 8 and 8 are provided at both ends of the depression 7, respectively.
and connect these sample suction ports 8, 8 to a common connector 9.
It is connected to the suction conduit 6 via.

The sample suction mat for continuous movement on road surfaces of the present invention has the above-mentioned configuration, so when the recess 7 has a length of 13 cm and a width of 4 cm, and the suction mat 1 is run at a speed of 1 Km/H to 4 Km/H, the detection output The wind speed is as shown in the actual battle shown in Figure 3, and even if the wind speed changes greatly, the output remains approximately constant.

On the other hand, in a conventional mat with a rough bottom surface and only one sample suction port, the output greatly decreases as the wind speed increases, as shown by the dotted line in FIG. 3, causing errors.

As described above, the sample suction mat for continuous movement on a road surface according to the present invention does not cause any errors and can eliminate the drawbacks of the conventional method.

[Brief explanation of the drawing]

Figure 1 is a front view of the leak detection device, Figure 2 is a plan view of the sample suction mat for continuous movement on road surfaces, and Figure 3 is a front view of the leak detection device.
The figure is its characteristic diagram. 1... Suction mat main body, 2... Wheels for moving the mat, 3... Handle, 4... Handle, 5... Gas detector with built-in pump, 6... Suction conduit, 7... Recess,
8...Sample suction port, 9...Connector, 10...Filter.

Claims (1)

[Scope of utility model registration request] A gas suction detection mechanism, a gas suction conduit connected to this mechanism, a filter inserted in this suction conduit, a mat body with a smooth bottom surface such as silicone rubber, and a mat body that is arranged in a direction perpendicular to the direction of movement of this mat body. A road surface continuous movement characterized by comprising an extending rectangular upward depression, sample suction ports formed at both ends of the depression, and a connector for connecting these two sample suction ports to the gas suction conduit. Sample suction mat for use.