JP3235634B2 - Fixing device of diving type sensor to the bottom wall of flow channel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a fixing device of a diving type sensor which is fixed to a bottom wall of a flow path (for example, factory drainage, rainwater, sewage, etc.) flowing with a free water surface and used for measuring a flow rate. is there.

[0002]

2. Description of the Related Art In a flow path having no water level fluctuation, if the flow velocity is measured using a sensor that detects the flow velocity, the flow rate can be measured by the cross-sectional area and the flow velocity of the water flow based on the water level.
Alternatively, in a flow path where the water level fluctuates, if a weir or flume is installed in the flow path and the water level on the upstream side is measured by a water level detection sensor, the flow rate can be measured based on the water level.

Therefore, conventionally, a base was provided on the bottom wall of the flow channel, and the diving sensor was directly fixed to the base. However, this method shuts off the water upstream of the sensor installation position and drains the pump downstream of the water shutoff section during installation while the flowing water is flowing, and attaches (or removes) the sensor during that time. This requires a lot of man-hours and requires a water stop device and a drainage pump. In addition, it takes a long time to shut off the flowing water and set up the sensor, which increases the time to be exposed to toxic gas generated from drainage and sewage, which may lead to personal injury.

FIG. 6 shows an apparatus for solving the above problems.
Japanese Utility Model Publication No. 1-36086 shown in (a, vertical sectional side view) and (b, a front view in FIG. A) is known. This conventional example will be briefly described. 6 (a) and 6 (b), reference numeral 1 denotes a circular flow path having a free water surface S and varying the water level, 2 denotes a flume installed in the circular flow path 1, 3 denotes a diving sensor for detecting a water level, Reference numeral 4 denotes a sensor fixing device for installing the diving sensor 3 on the bottom wall A of the flow path 1.
And a diameter changing device 6 for pressing and fixing the arc-shaped member 5 to the flow-path bottom wall A by a tension action with the arc-shaped member 5 having an arc length slightly shorter than the outer periphery of the flow-path and the inner wall of the flow path as a reaction point.
It consists of The diameter changing device 6 includes substrates 9, 9 hingedly connected to the arc-shaped member 5, and a screw rod 13 for expanding (or contracting) the substrate in the arrow Z direction. Reference numeral 31 denotes a lead protection tube for supplying power to the sensor and extracting output.

In the above arrangement, when the screw rod 13 is rotated by using the central portion of the screw rod 13 as a rotary operation tool, the rotational motion is converted into a linear motion between the screw portion e and the nut 12 and is transferred to one of the substrates 9. And thus the thread e and the nut 12
The two substrates 9, 9 are relatively separated by the rotation operation of, so that the arc-shaped member 5 is expanded and deformed.
As a result, the arc-shaped member 5 is pressed and fixed to the bottom wall A of the flow channel by a stretching action using the inner wall of the circular flow channel 1 as a reaction force point. According to such a configuration, the sensor can be installed or replaced without stopping the water flow.

[0006] c _1, c _2, c ₃ are a plurality of horizontal confirmation graduations provided on the right and left distribution locations around the sensor 3, pitched Mizuito the corresponding graduation example c _3, c ₃ with the left and right The horizontal position of the lever allows the sensor 3 to be positioned at the lowest part of the flow path 1.

[0007]

However, in the above-mentioned conventional fixing device, since the diameter changing device for changing the diameter and the support portion are present in the flow path, foreign matters are caught here and hinder the flow rate measurement. And a slight loosening of the rotary operation tool causes a fixing failure of the sensor. In addition, when installing or replacing the sensor, there is a problem that a rotation operation is required for attaching and detaching the fixing device, which is troublesome. Further, there is a problem that it takes a long time to perform positioning when fixing the fixing device once removed.

The present invention has been made to solve the above-mentioned problems of the prior art. A guide is fixed along an inner wall of a flow path, and a sliding member having a sensor attached thereto is inserted into the guide. Accordingly, an object of the present invention is to provide a sensor fixing device that can be easily attached and detached.

[0009]

In order to achieve this object, the present invention is an apparatus for fixing a diving sensor to a bottom wall of a channel having a cylindrical cross section, the device being provided along an inner surface of the channel. A fixed guide member, and a sliding member to which the sensor is fixed near the distal end and guided by the guide to dispose the sensor on the bottom wall of the flow path. It is.

[0010]

The sliding member is guided by a guide member fixed along the inner surface of the flow path. If a sensor is fixed near the tip of the sliding member and the sliding member is always inserted to a fixed position, the sensor is always fixed at a fixed position. Hereinafter, a detailed description will be given based on embodiments.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a main part configuration of an embodiment of the present invention. In the figure, the same elements as those in FIG. 5 are denoted by the same reference numerals, and the duplicate description is omitted, but reference numeral 26 denotes a lid for closing an open hole formed above the flow path 1. Hereinafter, only differences from FIG. 6 will be described.

In FIG. 1, reference numeral 21 denotes a belt-shaped sliding member. A sensor 23 for detecting pressure, flow velocity and the like is fixed near the tip of the belt-shaped member, and a handle 30 is formed at the other end. . Reference numeral 22 denotes a guide member whose both ends are bent into an L-shaped cross section, and is fixed along the inner diameter of the flow path 1 by welding or the like. The sliding member 21 is inserted and slid while being contained inside the guide member 2. Reference numeral 24 denotes a stopper arranged so as to stop when the sliding member 21 is inserted into the guide member and the sensor 23 is located at the lowest position of the flow path. Although the above-mentioned members depend on the material of the flow path, they are preferably rust-resistant members such as stainless steel, for example. When the flow path is made of plastic, it may be made of plastic.

In the above-described configuration, the guide member 22 is formed in advance at a predetermined position along the inner surface of the flow path to a predetermined length, and the sliding member 2 having the sensor 23 fixed near the distal end thereof.
1 is inserted from the sensor fixed side. In this case, the strip-shaped sliding member is guided by the guide member and enters while abutting on the inside of the guide member 22, but is slightly larger than the radius of the guide member so that it can be easily inserted and removed and has a certain amount of friction. It is desirable to form a curved surface in advance to such an extent that it becomes (or small).

In the embodiment, a stopper is provided on the bottom wall of the flow channel 1. However, as shown in FIG. 2, for example, a stopper 24a is provided above the flow channel and a hole 22a is provided near the handle 30 of the sliding member 22. It may be opened and the stopper 24a may be inserted into the hole 22a and locked. If there is appropriate friction between the sliding member 21 and the guide member 22, the stopper is not used.
Only a mark for positioning the sensor 23 may be provided.

FIGS. 3 (a) and 3 (b) show a fixed state of the guide member. FIG. 3 (a) shows a state in which a member having an L-shaped cross section is capable of including a sliding member along the inner surface of the flow path. Fixed in parallel by welding. (B) is similarly formed by bending both ends into an L-shape using a band-like plate and fixing the same by welding or the like. The shape of the guide member can be variously designed without being limited to the illustrated embodiment.

By the way, for example, when measuring the flow rate of sewage under a manhole, it may not be possible to completely enter the manhole. FIG. 4 shows the flow path in the longitudinal direction and the center of the cross section A
This shows an example in which the apparatus is divided into four parts, and flanges a and b are provided to seal the parts in a watertight manner. The apparatus is separated and carried in, and then assembled on site. In this case, the seam of the guide member is slightly shifted, and it becomes difficult to insert the sliding member. FIG. 5 solves such an inconvenience, and the end of the joint of the guide member 22 'is formed in a wide mouth shape to facilitate insertion.

[0017]

As described above, according to the structure of the present invention, the guide member fixed along the inner surface of the flow path, the sensor is fixed near the distal end and guided by the guide member, and the sensor flows through the flow path. Since the sliding member is provided on the bottom wall of the road, there is no need to worry about displacement in the horizontal and vertical directions, the sliding member can be easily inserted and removed, and maintenance of the sensor can be simplified. In addition, in the conventional example, it was necessary to loosen the screw at the time of maintenance to remove the entire device, and it took time to position the device when mounting the device. In the present invention, however, the sliding member is simply pulled out and reinserted. Well installed and maintained easily.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a main configuration showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part configuration showing another example of positioning of a sliding member.

FIG. 3 is an explanatory view showing a fixed state of a guide member.

FIG. 4 is an explanatory diagram showing a state in which a flow path is divided into four.

FIG. 5 is an explanatory view showing a state in which the end of the joint of the guide member is formed in a wide mouth shape.

FIG. 6 is an explanatory diagram of a configuration of a conventional example generally used in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flow path 2 ... Flume 21 ... Sliding member 22 ... Guide member 23 ... Diving sensor 24 ... Stopper 26 ... Lid 30 ... Handle

Claims (2)

(57) [Claims] An apparatus for fixing a diving sensor to a bottom wall of a flow path having a cylindrical cross section, comprising: a guide member fixed along an inner surface of the flow path; An apparatus for fixing a submersible sensor to a bottom wall of a flow path, comprising a sliding member guided by a guide member to dispose the sensor on the bottom wall of the flow path. 2. The flow path according to claim 1, wherein, when the cross section of the flow path is divided into a plurality of sections, an inlet side of a guide member through which the sliding member is guided is formed in a wide mouth shape. A device for fixing a diving sensor to the road bottom wall.