Sensor fixing jig

Abstract

To prevent obstruction of channels in a sewer, an influence due to the size of a pipe diameter, and risks in construction work in a jig for fixing a sensor that measures information from the bottom of the sewer.SOLUTION: A jig 15 for sensor fixation comprises: a jig body 16 that is formed in an articulated shape; and a sensor attachment part 24 that is arranged at a lower end of the jib body 16 and attached with a water level sensor 25. The jig body 16 includes division jigs 17a-17d that are rotatably connected with each other. The division jigs 17a-17d each include a division part 19 with a U-shaped cross section, and a fixation plate 20 that fixes the division part 19. The fixation plate 20 is formed with fixation holes 20a, 20b for anchors.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a jig for fixing a sensor that acquires information such as water level in a sewer. [Background technology]

[0002] Patent Documents 1 and 2 are known as techniques for fixing a water level sensor (water level gauge) that acquires information about the water level inside a pipe.

[0003] In Patent Document 1, a throw-in type water level meter is inserted into a breakwater pipe and fixed by a flange attached to the upper end of the breakwater pipe, and the breakwater pipe is equipped with a plate member that supports a cable connected to the water level meter.

[0004] In Patent Document 2, a water level gauge holder is attached to a sensor fixing plate of a sensor fixing device formed according to the curved surface of the bottom surface of the invert of a culvert. The sensor main body is housed in this water level gauge holder. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-024146 [Patent Document 2] Japanese Patent Application Publication No. 2020-201290 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-10403 [Patent Document 4] Japanese Patent Publication No. 2020-2618 Summary of the Invention [Problem to be solved by the invention]

[0006] In Figure 7, reference numeral 1 denotes the breakwater pipe described in Patent Document 1 and elsewhere. This breakwater pipe 1 is usually fixed to a vertical wall surface 2 of a rectangular waterway such as an irrigation channel. However, in cases where the bottom of a pipe is arc-shaped, such as a culvert 3, the water level meter must be installed on an invert 30 inside a manhole, making it difficult to measure the water level from the bottom of the pipe. On the other hand, if a water level meter is installed at the bottom of the pipe, as shown in Figure 8, the breakwater pipe is inserted into the culvert 3, which raises the risk of debris getting caught and blocking the flow path.

[0007] 9 indicates the sensor fixture 4 of Patent Document 2. A circular waterway (a waterway with a tubular cross section) such as a culvert 3 is mounted with a water level meter 5 using a sensor fixture 4 of Patent Document 2 or the like, and the sensor fixture 4 is fixed inside the pipe.

[0008] Although it is certainly possible to measure the water level from the bottom of the pipe 3 using the sensor fixture 4, if the pipe diameter is large, the sensor fixture 4 itself becomes large and it becomes difficult to insert it into the manhole.

[0009] That is, since the diameter of a typical manhole is about 600 to 900 mm, it cannot be applied when the diameter of the waterway exceeds 900 mm. On the other hand, even if the sensor fixture 4 can be inserted into the manhole, since the worker must enter the water flow to perform the work, there is a risk that the worker may be swept away during the work if the water level in the culvert 3 is high and the flow velocity is fast.

[0010] The present invention was made to solve these conventional problems, and aims to solve the problem of reducing flow path obstruction within the sewer, the effects of pipe diameter size, and the dangers of construction work in a fixture for fixing sensors that measure information from the bottom of a sewer. [Means for solving the problem]

[0011] (1) The present invention is a jig for fixing a sensor that measures information inside a sewer, a jig body formed in an articulated shape; a sensor mounting portion provided at a lower end of the jig body and to which the sensor is attached; The jig body can be attached along the inner peripheral surface of the culvert.

[0012] (2) One aspect of the jig body includes at least three or more split jigs, The dividing jigs are each connected to each other so as to be able to rotate freely.

[0013] (3) One aspect of the dividing jig has a dividing portion formed in a U-shaped cross section, the jig body includes a row of accommodating portions formed within the group of divided portions, The housing section is characterized in that a cable is housed in the housing section to transmit measurement information from the sensor to a communication control device installed on the manhole side above the culvert.

[0014] (4) Another aspect of the dividing jig is that it includes a fixing portion that fixes the dividing portion, The fixing portions of at least two or more of the dividing jigs are fixed to the wall surface.

[0015] (5) One aspect of the sensor mounting portion is characterized in that it is rotatably connected to the lower end of the dividing jig arranged at the lowest level. [Effects of the Invention]

[0016] According to the present invention, Sewer The fixture for sensors that measure information from the bottom of pipes makes it possible to reduce flow obstruction within the pipe, the effects of pipe diameter size, and the dangers of construction work. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 2 is a diagram showing an installation state of the sensor fixing jig according to the embodiment of the present invention. [Figure 2] The same perspective view. [Figure 3] Side view of the same. [Figure 4] Rear view of the same. [Figure 5] FIG. [Figure 6] A schematic diagram of the fixed state inside the sewer. [Figure 7] A diagram of the fixed state using the wave protection tube in Patent Document 1. [Figure 8] Application diagram to the same sewer. [Figure 9] FIG. 1 is a diagram showing the state of fixation using the sensor fixture of Patent Document 2. [Figure 10] Schematic diagram of an invert installed at the bottom of a manhole. DETAILED DESCRIPTION OF THE INVENTION

[0018] A sensor fixing jig according to an embodiment of the present invention will be described below. This jig is used to fix sensors that measure various types of information inside pipes such as sewer pipes and water pipes.

[0019] Here, the jig will be described based on an example of fixing a water level sensor that measures water level information inside a sewer. This water level sensor is connected by wire or wirelessly to a communication control device (see Patent Documents 3 and 4) installed inside a manhole that communicates with the sewer or on a manhole cover that closes the upper opening of the manhole. This allows the water level information measured by the water level sensor to be transmitted via the communication control device to a management server (not shown) or the like.

[0020] Explaining the installation situation based on Figure 1, 10 indicates a communication control device installed in a manhole 12, H indicates the upstream side of the sewer 3, L indicates the downstream side of the sewer 3, and 15 indicates the jig fixed along the bottom of the sewer 3.

[0021] <Configuration example of the jig 15> An example of the configuration of the jig 15 will be described with reference to Figures 2 to 5. The jig 15 includes a jig body 16 formed in an articulated shape, and a sensor mounting portion 24 provided at the lower end of the jig body 16 and capable of mounting a water level sensor 25.

[0022] (1) In Figures 2 to 4, 17a to 17d denote a plurality of rotatably connected dividing jigs 17. The dividing jigs 17a to 17d are connected together to form a jig body 16.

[0023] However, the number of dividing jigs 17 can be changed as appropriate depending on the size of the culvert, etc. For normal sizes, it is preferable to use a jig body 16 in which three to five dividing jigs 17 are connected together. Here, as an example, a jig body 16 in which dividing jigs 17a to 17d are connected together will be described.

[0024] The dividing jigs 17a to 17d are each formed in the same shape, and as shown in Figures 2 and 3, each include a dividing section 19 formed in a U-shaped cross section, and a pair of left and right fixing plates 20 that fix the dividing section 19 in place.

[0025] 3 and 4, the division section 19 includes a bottom plate 19a and side plates 19b standing substantially perpendicularly from both sides of the bottom plate 19a. Each division section 19 includes spaces P1 to P4 between the bottom plate 19a and each side plate 19b, and through holes 21a (see FIG. 3) through which pins 21 are inserted are formed at the upper and lower ends of each side plate 19b.

[0026] Adjacent dividing jigs 17a to 17d are rotatably connected to each other by inserting pins 21 into the through holes 21a, thereby forming the jig body 16 in an articulated shape, and as shown in Fig. 5, the dividing jigs 17a to 17d can rotate to deform the jig body 16 into a curved shape.

[0027] The left and right fixing plates 20 are formed by bending horizontally from the upper end of each side plate 19b. A pair of upper and lower fixing holes 20a, 20b are formed in each fixing plate 20. The fixing holes 20a, 20b are formed as vertically long holes (oblong holes), and the jig 15 is fixed by driving anchors (not shown) through the fixing holes 20a, 20b.

[0028] (2) The sensor mounting portion 24 has a U-shaped cross section, similar to the dividing portion 19, and has side plates 24b standing approximately perpendicularly from both sides of a bottom plate 24a. A space P5 is formed between the bottom plate 24a and each side plate 24b, and a through-hole (not shown) through which the pin 21 is inserted is formed in the upper end of each side plate 19b.

[0029] By inserting a pin 21 through this through-hole, the sensor mounting portion 24 is rotatably connected to the lowest dividing jig 17d. This connects the spaces P1 to P5 to form a row of spaces P. This space P accommodates a cable that connects the wired water level sensor 18 and the communication control device 10. In this sense, the space P can be called a cable accommodation portion.

[0030] Meanwhile, a water level sensor 25 is housed within the lower end of the sensor mounting portion 24. This water level sensor 25 comprises a sensor holder that is fixed within the sensor mounting portion 24 by known means such as screwing, fitting, or fastening, and a sensor body that is built into the sensor holder and measures the water level within the sewer.

[0031] ≪Fixing method≫ A method for fixing the water level sensor 25 using the jig 15 will be described. Here, an example of fixing to the culvert 3 shown in Fig. 1 will be described. This culvert 3 is formed as a circular waterway (with a circular tubular cross section) with an arc-shaped bottom.

[0032] First, the water level sensor 25 is fixed to the sensor mounting portion 24 in advance, and the manhole cover (not shown) is opened and the jig 15 is inserted into the manhole 12. Next, the jig 15 is carried to the invert 30 (see FIG. 10) inside the manhole 12, and the jig 15 is fixed to the downstream side L of the sewer 3 as shown in FIG.

[0033] That is, the anchors are driven into the wall surface through the fixing holes 20a, 20b of the dividing jigs 17a to 17d and fixed in place. However, it is not necessary to fix all of the dividing jigs 17a to 17d, and it is sufficient to fix any two or more depending on the water level during construction, and the cable is fixed in place while being housed in the space P.

[0034] At this time, jig body 16 is configured by rotatably connecting dividing jigs 17a to 17d, and therefore curves and deforms along the curvature of the inner circumferential surface (arcuate wall surface) of pipe 3, as shown in Fig. 5. Furthermore, sensor mounting part 24 is rotatably connected to dividing jig 17d, and therefore is disposed along the inner circumferential surface of pipe 3, facing toward the pipe bottom.

[0035] As a result, as shown in Fig. 6, the water level sensor 25 is placed on the inner circumferential surface of the pipe bottom of the sewer 3, and the sensor body can measure water level information from the pipe bottom. The water level information measured here is transmitted to the communication control device 10 via the cable, and then sent from the communication control device 10 to the management server.

[0036] Such a jig 15 can be fixed along the inner peripheral surface of the duct 3, and therefore water level information can be measured from the duct bottom without causing flow path obstruction as occurs in the case of using the wave breaker duct 1 of Patent Document 1. Similarly, since the cable is housed in the space P, the cable does not cause flow path obstruction.

[0037] Furthermore, although the jig 15 is formed in a long shape, it has a small width and can be easily inserted into the manhole 12. Therefore, the jig 15 is not affected by the size of the pipe diameter, unlike the sensor fixture 4 of Patent Document 2, and can be used without any problems in the culverts of large waterways with large pipe diameters.

[0038] Furthermore, workers can simply select any dividing jig 17a to 17d within reach from the top of the invert 30, and for example, can select only the upper dividing jigs 17a and 17b and perform construction work without entering the waterway inside the sewer 3.

[0039] This makes it possible to avoid danger of workers being swept away even when the water level in the waterway is high and the flow rate is fast, etc. Furthermore, since the fixing holes 20a and 20b are formed as elongated holes, there is also the effect that the position of the elongated holes can be easily adjusted in the long side direction when fixing the jig 15 with the anchors.

[0040] The present invention is not limited to the above-described embodiment, and can be modified and implemented within the scope of the claims. For example, the jig 15 can be used not only for measuring the water level of circular waterways, but also for measuring the water level of waterways with a rectangular cross section, such as irrigation channels.

[0041] Further, instead of the water level sensor 25, other sensors capable of measuring information inside the sewer, such as a flow velocity sensor or a flow rate sensor, may be attached to the sensor attachment portion 24. [Explanation of symbols]

[0042] 3…Pipe culvert 10...Communication control device 15...Sensor fixing jig 16...Jig body 24...Sensor mounting part 17a~17d...Dividing jig 19...Divided part 20…Fixing plate (fixing part) P... Storage section

Claims

1. A jig for fixing a sensor that measures information inside a sewer, a jig body formed in an articulated shape; a sensor mounting portion provided at a lower end of the jig body and to which the sensor is attached; Equipped with The jig body can be attached along an inner peripheral surface of the culvert, The jig body includes at least three or more split jigs, The dividing jigs are rotatably connected to each other, The dividing jig is The dividing portion has a cross section that is substantially U-shaped, the jig body includes a row of accommodating portions formed within the group of divided portions, The housing accommodates a cable for transmitting measurement information from the sensor to a communication control device installed on the manhole side above the culvert. A sensor fixing jig characterized by the above.

2. the dividing jig includes a fixing portion that fixes the dividing portion, 2. The sensor fixing jig according to claim 1, wherein the fixing portions of at least two of the split jigs are fixed to a wall surface of the culvert.

3. 3. The sensor fixing jig according to claim 1, wherein the sensor attachment portion is rotatably connected to a lower end of the dividing jig arranged at the lowest level.

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