JP2883195B2 - Rotary reference electrode - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention scans a potential of a metal body such as a pipe or a reinforcing bar laid or installed in an electrolyte such as soil or concrete by scanning the above-mentioned electrolyte on a linear basis. The present invention relates to a rotary reference electrode used for measurement at a time.

"Conventional technology" Recently, corrosion of reinforcing steel in concrete structures has recently been regarded as a problem, and it is necessary to evaluate these corrosive properties as a surface. And so on.

Conventionally, a reference electrode for potential measurement used for this kind of application has a large number of reference electrode bodies mounted thereon as shown in Japanese Utility Model Laid-Open No. 61-190871 or JP-A-62-130348.
It is exclusively applied to a planar environment. JP-A-62
In the device described in JP-A-130348, a plurality of reference electrodes themselves are arranged at multiple points on the surface, and only switching wheels are equipped for carrying and moving the reference electrode body. It was relocated and could be measured intermittently. On the other hand, in the device disclosed in Japanese Utility Model Application Laid-Open No. 61-190871, the reference electrode is provided on a rotating body, and by rotating the rotating body, the potential of each point on the surface is continuously changed. The electrical contact between the rotatable reference electrode required to capture the potential and the lead wire leading to the external instrument to be fixed is a rotary shaft with silver plate and a rotary shaft with fixed carbon brush or copper plate. And fixed metal blades are interposed.
Alternatively, install an ON-OFF type micro switch which is fixed to the outside in contact with a plurality of concave and convex portions provided on the rotating shaft for capturing and supporting the potential, or at a fixed interval around the rotating shaft or rotating disk. A projection, such as a music box pin, is provided and fixed blades facing the projection make electrical contact with the projection, cutting, and the like mechanical. It does not matter that the latter is superior in handling and efficiency.

"Problems to be Solved by the Invention" However, the above-mentioned Japanese Utility Model Application Laid-Open No. 61-190871 has the following drawbacks to be solved in actual use.

(A) During the rotational scanning of the reference electrode, the electrical contact of the electrode body is worn or the vibration causes a contact failure, making it impossible to take in the potential.

(A) Intake of electric potential The contact point of the support causes poor contact due to wear or vibration, and the electric potential is missed.

(C) Since the reference electrode is large and heavy, it is impossible to measure the potential on the vertical surface or the overhead back surface.

The present invention has been made for the purpose of eliminating the above disadvantages.

"Means for solving the problem" The present invention provides a rotating metal shaft that is rotatably mounted on both sides at one end of a bolt-type rotating shaft made of metal such as stainless steel in order to solve the above-described problems. The other end of the rotating shaft with a rotary connector, which is a fluid conductive metal sealed cylinder of, for example, mercury holding the fixed metal shaft and fixing the rotating metal shaft, is integrated with or separated from a wheel that promotes reference rotation. A plastic disc-shaped reference electrode with a metal reference electrode inside is fixed in a solid electrolyte in which a ring-shaped sponge with a slightly larger diameter than the wheel with elasticity and high water absorption is attached to the outermost periphery made of And a lead wire of the reference electrode body is connected to the head of the rotating shaft. Further, a pulse reflector with a circular external tooth is fixed to the center of the rotating shaft, and the shaft is formed into a groove shape for the reflector. The photoelectric sensor is placed in place to prevent the telescopic handle from being equipped. Assembling in a mode where only the reference electrode body is exposed to the water box via a bearing, and connecting the lead wire of the lightning sensor and the lead wire connected to the fixed metal shaft to an external instrument outside the waterproof box. is there.

[Operation] According to the rotary reference electrode configured as described above, the above-described reference electrode, electrode lead wire, bolt-type rotary shaft, rotatable shaft of rotary connector, fluid conductive metal, fixing of rotary connector. The metal shaft and the lead wires are all electrically connected metallically, for example, via a flowing conductive metal such as mercury. For rotational scanning, a reference electrode fixed to the rotating shaft, wheels, a pulse reflector and a rotatable disk The shafts rotate simultaneously, but the metal shaft fixed to the rotary connector tube or rotatable is prevented from rotating by the lead wire fixed to the waterproof box with a handle, and becomes a fixed state. Further, the lead wire of the groove-shaped photoelectric sensor fixed to the outside is guided to the external instrument without receiving any physical external force during the rotational scanning.

Such a structure can solve the problems to be solved, such as the abrasion of the electric contacts, the simplification of the structure, the adoption of a light structural material, and the like, such as miniaturization and weight reduction.

Example The example will be described in detail with reference to the drawings. As shown in the figure, a plastic disc-shaped reference electrode is formed on the outer peripheral surface of a side wall surface serving as a wheel on the large diameter side of the circumferential groove, and has a constant diameter. A belt ring 1 made of rubber or the like is attached to enable the holding and slip prevention of the shaft, and an insertion hole for a metal bolt type rotating shaft 2 is provided at the center of the side wall surface.
One through hole 3 is provided at the bottom of the groove. One end of a linear or belt-like metal reference electrode body 4 such as lead or copper mounted in the groove is led out of the through hole 3 toward the center of the plastic disk. Further, a hygroscopic solid electrolyte 5 to be joined to the electrode body 4 is filled in the groove up to the outer peripheral surface of the small-diameter side wall surface on one outermost surface side and solidified, and can be mounted in close contact with the electrolyte 5. A ring-shaped sponge 6 having elasticity and high water absorption and having a slightly larger diameter than the zonal 1
Is fixed to the tip of the metal bolt-type rotating shaft 2. Therefore, when rotating and traveling, the outer peripheral surface of the ring-shaped sponge 6 and the outer peripheral surface of the wheel band 1 that is maintained at a constant diameter coincide with each other as shown in FIG.

On the other hand, the metallic bolt-type rotary shaft 2 is provided with a head 7 having a circular shape or the like larger than the shaft diameter, and a screw hole 8 in the axial direction of the center of the head 7 and a head 7 on the outer periphery of the head 7. Two screw holes 9, 9 for screwing are provided therethrough, and the electrode body 4 of the disc-shaped reference electrode inserted from the tip of the rotating shaft 2 is inserted through a lead wire into the center of the rotating shaft 2 head. It is connected and fixed using the screw hole 8 and the head 7
The two screw holes 9 and 9 are aligned with the two screw holes 10 and 10 provided in the center wall of the reference electrode and fixed by screws, and further a spring washer inserted from the tip of the rotary shaft 2 The reference electrode is firmly fixed by a washer and a bearing nut 11, thereby enabling the reference electrode and the rotary shaft 2 to rotate simultaneously.

Then, after inserting a rotatable bearing 14, a telescopic handle 15 and a lid waterproof box 16 for waterproofing of the connection part of the rotary connector and fixing of the grooved photoelectric sensor 12 and the lead wire 13 for the reflector,
Two bearing nuts 18 are provided to the extent that the wear-resistant rubber ring 17 for waterproofing, which has been preliminarily bonded and fixed to a groove having a semicircular cross-section on the side wall surface of the large-diameter side, is lightly pressed and does not hinder rotation. , 18
Then, the above-described pulse reflector 19 was inserted and firmly fixed with a bearing nut 20. Further, at the tip of the rotating shaft 2,
Both ends of a flowing conductive metal sealing cylinder 21 such as mercury are electrically connected to the flowing conductive metal 22 and are independently provided, one of which is a rotatable metal shaft 23 and the other is fixed to the sealing cylinder 21. One of the rotary shafts 23 provided with the mounted metal shaft 24 is directly inserted into a bearing hole provided at the center of the tip of the rotary shaft 2, fixed with screws 25 and electrically connected to the rotary shaft 2. The lead wire 26 connected by using the screw of the other screwed fixed metal shaft 24 is a waterproof box.
Connected to a plurality of lead wire connection terminal receivers 27 fixed to 16, similarly the lead wire 13 of the groove type photoelectric sensor fixed to the waterproof box 16 is also connected to the connection terminal receiver 27, multi-core It is integrated with the lead wire 28 and led to the external instrument 29. Therefore, these lead wires 13 and 26 are guided to a separately developed external instrument with a built-in computer without receiving any external physical force during the rotational scanning.

With the rotary reference electrode having such a structure and an interactive instrument with a built-in computer, the number of potentials to be taken, the measurement interval, and the like are arbitrarily set from the instrument, and the rotary reference electrode is rotationally scanned linearly, or a fixed distance straight line. Repeated scanning in the horizontal direction of the scanning makes it possible to accurately record linear or checkerboard data without missing any data, and to achieve a great increase in work efficiency.

“Effects of the Invention” The present invention is configured as described above, and the effects are listed below.

(A) The electric contact is made of a flowable conductive metal such as mercury, which enables reliable potential capture and capture support.

(A) When scanning the soil surface or the like, it is not necessary to supply electrolyte such as water.

(C) Even when the potential of the concrete surface is scanned, it is not necessary to supply the electrolyte or the like to the reference electrode by spraying an electrolyte such as water on the concrete surface in advance.

(D) By attaching a sponge made of a highly hygroscopic plastic, the effect of preventing drying of the solid electrolyte serving as a back film of the reference electrode body is great.

(E) The range of expansion and contraction of the handle is 300-1200mm, and it can measure from the low part to the high place of 3m.

(F) The scanning speed of the rotary reference electrode when capturing measured potential data is about 2 m / sec, and the number of captured data is about 20 points / sec or more. Considering manual measurement and recording, Its work efficiency is more than 200 times.

(G) The two rotary reference electrodes are fixed linearly or in parallel at predetermined intervals, and the potential gradient between them can be measured by rotating and scanning.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a rotary reference electrode according to the present invention, and FIG. 2 is a side view showing a used state. DESCRIPTION OF REFERENCE NUMBERS 1 ... obi ring, 2 ... metal bolt type rotating shaft, 3 ... through hole, 4
... Metal reference electrode body, 5 ... Solid electrolyte, 6 ... Ring sponge, 7 ... Head, 8 ... Screw hole, 9 ... Screw hole, 10 ... Screw hole, 11 ... Nut for bearing, 12 ... Slot shape for reflector Photoelectric sensor,
13 ... lead wire, 14 ... bearing, 15 ... telescopic handle, 16 ... waterproof box with lid, 17 ... wear-resistant rubber ring, 18 ... bearing nut,
19 ... Pulse reflector, 20 ... Nut for bearing, 21 ... Fluid conductive metal sealed cylinder, 22 ... Fluid conductive metal, 23 ... Metal shaft, 24 ... Metal shaft, 25 ... Screw, 26 ... Lead wire, 27 ... Lead Wire connection terminal receiver, 28 ... Lead wire, 29 ... External instrument.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01N 27/26 G01N 27/30

Claims (1)

(57) [Claims] 1. A fluid conductive member for holding a rotating metal shaft (23) and a fixed metal shaft (24) rotatably mounted on both sides at one end of a metal bolt-shaped rotating shaft (2) made of stainless steel or the like. The other end of the rotary shaft with the rotary connector, which fixes the rotary metal shaft (23) of the metal sealed cylinder (21), has elasticity on the outermost periphery which is integrated with or separated from the wheel that promotes reference rotation. In a solid electrolyte (5) to which a ring-shaped sponge (6) having high water absorption and slightly larger in diameter than the wheel is mounted, a plastic disc-shaped reference electrode having a metal reference electrode body (4) is inserted. Fixed, and the lead wire of the reference electrode body is connected to the head of the rotating shaft (2), and a pulse reflector with a circular external tooth (19) is fixed to the center of the rotating shaft (2). The shaft (2) is provided with the grooved photoelectric sensor (12) for the reflector (19) at a predetermined position, and the telescopic handle (15) is provided. Is mounted on a waterproof box (16) equipped with a bearing (14) so that only the reference electrode body is exposed, and is connected to the lead wire of the photoelectric sensor (12) and the fixed metal shaft (24). Lead wire to the waterproof box (16)
Rotating reference electrode to be connected to external external instrument (29).