JP2003130712A - Inspection implement for electrode and inspection method for electrode using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection implement by which an electrode is inspected in a short time and simply without consuming a liquid such as tap water or the like. SOLUTION: The inspection implement 1 comprises transparent pipe mainframes 24, 31, 41 with graduations (g) at set intervals, lower end of it is closed and upper end is opened. The implement 1 is fixed to a ceiling wall Ta to be freely detachable so as to face an electrode seat 51 fixed to the ceiling wall Ta in a liquid storage tank T. The electrode in an electrode holder is inserted into the inspection implement 1, the electrode holder is fixed to the electrode seat 51, the liquid is injected into the inspection implement 1, and the electrode is inspected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode rod inspection tool used for detecting a liquid level in a liquid storage tank and an electrode rod inspection method using the inspection tool.

[0002]

[Prior Art] Conventionally, public facilities such as hospitals and schools,
Liquid storage tanks such as water supply facilities are installed in apartment houses, condominiums, and other commercial facilities, office buildings and other commercial facilities, or factories.

In the liquid storage tank, usually, a plurality of unit panels each having a joining flange at the peripheral portion are connected to form a ceiling wall, a side wall and a bottom wall, and these ceiling wall, side wall and bottom wall are assembled. Formed by.

In such a liquid storage tank, in order to detect when the liquid level in the tank is in an abnormal state, three to five lines are provided.
A sensor consisting of a book electrode rod is provided.

As shown in FIG. 3, this sensor has an electrode seat 51 in a mounting hole ta formed in a ceiling wall Ta of a liquid storage tank T.
Is inserted into the ceiling wall Ta via the nut N.
It is fixed to. Further, the electrode rod 5 is attached to the electrode seat 51.
The electrode holder 53 holding 2 is screwed into the electrode rod 52.
Is suspended in the liquid storage tank T through the ceiling wall Ta.

In order to prevent a wave generated when the liquid is supplied to the liquid storage tank T from colliding with the electrode rod 52 and malfunctioning, a wave-proof cylindrical seat 54 is screwed into the electrode seat 51. At the same time, the wave preventing tube 55 is joined to the wave preventing tube seat 54 and surrounds the electrode rod 52. Further, an electrode seat cover 56 in which a cable hole 56a for drawing out a cable (not shown) connected to the electrode holder 53 is formed in the electrode seat 51.
Is installed.

The detection of the liquid level in the liquid storage tank T using the electrode rod 52 will be briefly described with reference to FIG. 4 when the liquid storage tank T is applied to the water receiving tank T1 and the elevated water tank T2. .

An introduction pipe 12 provided with a constant water level valve 11 is introduced into the water receiving tank T1 through the ceiling Ta of the water receiving tank T1, and the constant water level valve 11 is provided in the water receiving tank T1. It is designed to open and close in conjunction with the operation of the ball tap 11a. And the upper part and bottom wall Tb of the water receiving tank T1
The overflow pipe 13 and the drain valve 14, respectively.
Is connected to the drain pipe 15. In addition, the liquid stored in the water receiving tank T1 is pumped up by the pump P
The supply pipe 16 that supplies the water to the tank 2 is connected to the lower portion of the side wall Tc of the water receiving tank T1, and the base end opening thereof serves as an outlet for the liquid stored in the water receiving tank T1. Further, the valve 1 that is normally open is provided in the supply pipe 16 near the outside of the water receiving tank T1.
7 are provided. Further, in order to detect when the liquid level in the water receiving tank T1 is in an abnormal state, a sensor including three electrode rods 52 is usually hung from the ceiling wall Ta.

In such a water receiving tank T1, the water receiving tank T
When the liquid stored in 1 is taken out by the pump P and supplied to the elevated water tank T2 installed on the roof of the building or on the elevated platform, and the liquid level decreases, the ball tap follows the decrease in the liquid level. The float 11b of 11a is lowered, and the constant water level valve 11 that is interlocked with the ball tap 11a is opened. In this way, a liquid such as tap water is introduced into the water receiving tank T1 through the introduction pipe 12 and the constant water level valve 12. On the other hand, when the liquid level is sequentially increased by the introduction of the liquid, the float 11b of the ball tap 11a rises following the increase in the liquid level. Then, when the float 11b of the ball tap 11a reaches the upper limit liquid level HWL, the constant water level valve 11 is closed and thereafter the introduction of the liquid is shut off.

When the liquid level in the water receiving tank T1 becomes abnormal, that is, when the liquid level in the water receiving tank T1 becomes too high and reaches H1, or when it becomes too low and reaches H2. Detects the abnormality by the electrode rod 52, turns on the alarm lamp L by the control panel Cb, and outputs the alarm buzzer Bz.
Is sounded to notify. In particular, if the pump P becomes too low and reaches H2, the pump P may be in an idling state, so the pump P is stopped.

On the other hand, the elevated water tank T2 is installed on the roof of a building or the like, and has a structure similar to that of the water receiving tank T1 described above. Is used. Therefore, only portions different from the water receiving tank T1 will be described below.

Usually, in order to detect and control the liquid level of the liquid stored in the high water tank T2, a sensor consisting of five electrode rods 52 is suspended from the ceiling wall Ta. That is, the electrode rod 52 detects the liquid level in the high water tank T2, and the control panel Cb controls the pump P to operate or stop the liquid level in the high water tank T2. The range is kept between the upper limit liquid level HWL and the lower limit liquid level LWL. Further, when the liquid level in the high water tank T2 becomes too high and reaches H1, or becomes too low and reaches H2, the abnormality is detected, the alarm lamp L is turned on, and the alarm buzzer Bz is turned on. It is designed to be sounded to notify the abnormality.

In such an elevated water tank T2, the liquid level of the liquid stored in the elevated water tank T2 varies within a set range. That is, when the liquid is consumed, the liquid level of the liquid stored in the high water tank T2 is the lower limit liquid level LW.
When the liquid level drops to L, the electrode rod 52 detects the liquid level, operates the pump P, and supplies the liquid stored in the water receiving tank T1 to the elevated water tank T2 via the supply pipe 16. On the other hand, when the liquid is supplied, the liquid level of the liquid stored in the high water tank T2 rises, and when the liquid level reaches the upper limit liquid level HWL, the electrode rod 52 detects the liquid level and the operation of the pump P is stopped. Let
In this way, the liquid level in the elevated water tank T2 is always the upper limit liquid level HW.
It goes up and down between L and the lower limit liquid level LWL. Also, the valve 18
Is normally open and is a high water tank T2 placed at a high place
The liquid in the inside is supplied to a lower place through a supply pipe 19 by utilizing the height difference (for example, Japanese Patent Application Laid-Open No. HEI-1
0-299039).

[0014]

When the liquid storage tank T is installed, the electrode rod for detecting the liquid level of the liquid stored in the liquid storage tank T and controlling the liquid level within an appropriate range. 52
Must be fixed to the ceiling wall Ta and whether or not the electrode rod 52 normally operates must be inspected.

When inspecting such an electrode rod 52,
Liquid is supplied to the liquid storage tank T regardless of size, and the operator confirms the water supply state from the manhole, and a tester checks whether or not the predetermined electrode rod 52 outputs when the set water level is reached. I am trying to confirm using such as.

Therefore, in order to inspect all the electrode rods 52, the liquid storage tank T must be filled with water.
There was a problem that the inspection required a lot of time.

Further, when the electrode rod 52 malfunctions, the liquid supplied to the liquid storage tank T must be once discharged and then the same work must be performed again, and the liquid is wasted. There were also drawbacks.

The present invention has been made in view of the above problems, and an electrode rod capable of easily inspecting the electrode rod in a short time and without wasting a liquid such as tap water. An inspection tool and an inspection method for an electrode rod using the inspection tool are provided.

[0019]

The present invention can be detachably fixed to a ceiling wall of a liquid storage tank by facing an electrode seat fixed to the ceiling wall of the liquid storage tank. It is characterized in that it has a pipe body, the lower end is closed, and the upper end is opened.

According to the present invention, an inspection tool having a simple structure, which has a transparent pipe body with graduations set at set intervals, has a closed lower end and an open upper end, is provided in a liquid storage tank. By facing the electrode seat fixed to the ceiling wall and detachably fixing it to the ceiling wall, the electrode rod can be accurately inspected inside the liquid storage tank. Further, even if the liquid storage tank is different, it can be reused as any liquid storage tank.

In the present invention, the pipe body is provided in each of a fixed length upper pipe, a fixed length lower pipe, and a plurality of types of intermediate pipes having different lengths, connecting the upper pipe and the lower pipe, or When one or more intermediate pipes are connected between the upper pipe and the lower pipe to form a set length corresponding to the height of the liquid storage tank, the upper pipe, the intermediate pipe and the lower pipe are combined appropriately. It is possible to form an inspection tool having a set length according to the liquid storage tanks having different heights.

In the present invention, when each of the upper pipe and the lower pipe is provided with a valve having a hose connecting portion, a hose is connected to the hose connecting portion from the outside of the liquid storage tank, and an inspection is performed through the valve of the upper pipe. A necessary amount of liquid can be injected into the inside of the tool, and a hose can be connected to the hose connection portion to discharge the liquid injected into the inspection tool through the valve of the lower pipe to the outside of the liquid storage tank.

Further, according to the present invention, after the upper end opening of the inspection tool according to claim 1 is detachably fixed to the ceiling wall, the electrode rod of the electrode holder is inserted into the inspection tool to attach the electrode holder to the electrode seat. It is characterized in that the electrode rod is inspected by injecting a liquid into the inspection tool.

According to the present invention, the inspection tool according to claim 1 is fixed to the ceiling wall, the electrode rod of the electrode holder is inserted into the inspection tool to fix the electrode holder to the electrode seat, and then the inspection tool. Since it suffices to inject the liquid into the chamber to inspect the electrode rod, the liquid consumption required for the inspection is reduced to a minimum compared to the case of inspecting the electrode rod by injecting the liquid into the storage tank. In addition, the time required for the inspection can be significantly reduced. Even if the electrode rod malfunctions, only the liquid injected into the inspection tool needs to be discharged, and the waste of the liquid can be suppressed as much as possible.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electrode rod inspection tool of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of an electrode rod inspection tool 1 of the present invention.

The inspection tool 1 is composed of an upper pipe 2, an intermediate pipe 3 and a lower pipe 4.

The upper pipe 2 includes a flange member 21, a connecting pipe 22 joined to the flange member 21, a socket 23 joined to the connecting pipe 22, and a pipe body 24 having an upper end joined to the socket 23. , And a flange 25 is provided at the lower end of the pipe body 24. An air vent hole 21a is formed in the flange member 21 by penetrating the connecting pipe 22, and a ball valve 26 having a hose connecting portion 27 is connected to the socket 23 by penetrating the connecting pipe 22. .

The intermediate pipe 3 comprises a pipe body 31, and the flange 3 is provided at the upper and lower ends of the pipe body 31.
2 are provided respectively.

The lower pipe 4 comprises a pipe body 41 and a cap 42 joined to the lower end portion of the pipe body 41, and a flange 43 is provided at the upper end of the pipe body 41. A ball valve 44 having a hose connecting portion 45 is connected to the cap 42 by penetrating the pipe body 41.

The pipe body 24 of the upper pipe 2 described above,
The pipe main body 31 of the intermediate pipe 3 and the pipe main body 41 of the lower pipe 4 are both made of transparent resin, and each has a scale g at set intervals. Then, when the upper pipe 2 and the lower pipe 4 are connected, or when the upper pipe 2, the intermediate pipe 3 and the lower pipe 4 are sequentially connected, it is set so that the graduations g are continuously formed at equal intervals. .

Here, the upper pipe 2 and the lower pipe 4
Is formed to have a set length, and three types of intermediate pipes 3 having different lengths are prepared. Specifically, the upper pipe 2 has a length of 0.5 m, and the lower pipe 4 has a length of 0.91 m. Also, the intermediate pipe 3
3 lengths of 0.5m, 1.0m and 1.5m are prepared.

Therefore, the upper pipe 2 and the intermediate pipe 3
And the inspection tool 1 including the lower pipe 4 can be brought into the installed liquid storage tank T for reuse.
By appropriately combining and connecting the upper pipe 2, the intermediate pipe 3, and the lower pipe 4, it is possible to easily form the inspection tool 1 having a set length corresponding to different heights of the liquid storage tank T. For example, when the height of the liquid storage tank T is 1.5 m, the lower pipe 4 is connected to the upper pipe 2 and the liquid storage tank T
If the height is 2m, 2.5m, 3m, the length between the upper pipe 2 and the lower pipe 4 is 0.5m, 1m,
The 1.5 m intermediate pipes 3 are connected to each other. Similarly, when the height of the liquid storage tank T is further increased, a plurality of intermediate pipes 3 having different lengths or a plurality of intermediate pipes having the same length are provided between the upper pipe 2 and the lower pipe 3. The pipe 3 is connected.

When the upper pipe 2 and the lower pipe 4 are connected according to the height of the liquid storage tank T, or one or a plurality of intermediate pipes 3 are provided between the upper pipe 2 and the lower pipe 4. When connected, the space between the inner surface of the bottom wall Tb of the liquid storage tank T and the lower surface of the lower pipe 4 is set to be always constant.

Next, a procedure for inspecting the electrode rod 52 by using the inspection tool 1 thus constructed will be described.

First, the electrode seat 51 is fitted into the mounting hole ta formed in the ceiling wall Ta of the liquid storage tank T, and the nut N is screwed into the electrode seat 51 from the inside of the liquid storage tank T to attach the electrode seat 51 to the nut N. It is fixed to the ceiling wall Ta via.

Next, in order to correspond to the height of the liquid storage tank T, the upper pipe 2 and the lower pipe 4 and, if necessary, one or a plurality of intermediate pipes 3 having a set length are installed inside the liquid storage tank T. After being carried in (in FIG. 1, one intermediate pipe 3 having a set length is adopted, which will be described below with reference to FIG. 1), the flange member 21 of the upper pipe 2 is attached to the electrode seat 51. The flange member 21 is abutted against the inner surface of the ceiling wall Ta so as to surround the flange member 21 and is aligned with a bolt hole (not shown) formed around the mounting hole ta of the ceiling wall Ta in advance.
Is fixed with bolts and nuts.

Next, one flange 32 of the intermediate pipe 3 is brought into contact with the flange 25 of the upper pipe 2 via a packing (not shown), and both flanges 25, 32 are connected using bolts and nuts. Similarly, the flange 43 of the lower pipe 4 is brought into contact with the other flange 32 of the intermediate pipe 2 via the packing, and both the flanges 32 and 43 are connected using bolts and nuts.

Thereafter, the electrode rod 52 of the electrode holder 53 is inserted through the electrode seat 51, and the electrode holder 53 is inserted into the electrode seat 51.
Screw in and fix. In this state, the upper pipe 2,
An electrode rod 52 is suspended inside the inspection tool 1 including the intermediate pipe 3 and the lower pipe 4. Next, one end of a hose (not shown) introduced into the liquid storage tank T through a manhole (not shown) is connected to the hose connection portion 27 of the ball valve 26 of the upper pipe 2, and the liquid is fed into the inspection tool 1 through the hose. , For example, inject tap water. At this time, the air in the inspection tool 1 is replaced with tap water and discharged from the air vent hole 21a. Here, the water level of the tap water injected into the inspection tool 1 is determined by an operator who has descended into the liquid storage tank T by the pipe body 24 of the upper pipe 2 and the pipe body 3 of the intermediate pipe 3.
It can be confirmed by the scales g attached to the pipe bodies 41 of the lower pipe 1 and the lower pipe 4, respectively.

When tap water is injected to the inspection tool 1 up to the set water level, the presence or absence of the output of the electrode rod 52 corresponding to the lower limit water level is confirmed using a tester or the like. Hereinafter, similarly, tap water is supplied until the water level of the corresponding electrode rod 52 is reached,
Whether or not there is an output for each electrode rod 52 is sequentially checked from the low water level side.

When all the electrode rods 52 have been inspected, one end of a hose (not shown) is connected to the hose connecting portion 45 of the ball valve 44 of the lower pipe 4, and then the ball valve 4
4 is opened, and the tap water injected into the inspection tool 1 is discharged. At this time, if the other end of the hose is guided to the drain pipe 15 and the drain valve 14 is opened, the tap water injected into the inspection tool 1 can be discharged to the outside of the liquid storage tank T (FIG. 4). reference).

After that, the electrode holder 53 is loosened, and the electrode seat 5 is released.
The electrode holder 53 is pulled out from the inspection tool 1 together with the electrode rod 52. Then, the intermediate pipe 3 to the lower pipe 4, the upper pipe 2 to the intermediate pipe 3, and the ceiling wall Ta to the upper pipe 2 are sequentially removed, and then formed on the ceiling wall Ta for attaching the flange member 21 of the upper pipe 2. The formed bolt hole is closed using a bolt nut or the like. Then, after the wave preventing cylinder seat 54 in which the wave preventing cylinder 55 is joined to the electrode seat 51 is screwed and fixed to the electrode seat 51, the electrode rod 52 is inserted into the electrode seat 51, and the electrode holder 5
By screwing and fixing 3 into the electrode seat 51, a normal use state is obtained (see FIG. 3).

As a result, compared with the case of injecting the liquid into the liquid storage tank T to inspect the electrode rod 52, it suffices to inject the liquid such as tap water into only the inspection tool 1, which is required for the inspection. The consumption of liquid can be minimized, and
The inspection time can be significantly reduced. In addition, the inspection work can be performed in the liquid storage tank T, and the scale g attached to the inspection tool 1 can be confirmed up close and the inspection can be performed accurately.

In the above-described embodiment, the case where the flange member 21 of the upper pipe 2 constituting the inspection tool 1 is detachably fixed to the ceiling wall Ta by using bolts and nuts has been described. You may make it hang via a suspending tool, such as a wire of a set length.

[0045]

As described above, according to the present invention, the electrode rod can be easily inspected in a short time and without wasting a liquid such as tap water.

[Brief description of drawings]

FIG. 1 is a front view showing an electrode rod inspection tool of the present invention fixed to a liquid storage tank.

FIG. 2 is an enlarged view showing the inspection tool of FIG. 1 with a part thereof omitted.

FIG. 3 is a partial cross-sectional view showing a state in which a sensor made of an electrode rod is attached to a ceiling wall of a liquid storage tank, with a part thereof omitted.

FIG. 4 is a schematic diagram illustrating a water receiving tank and a high water tank which are liquid storage tanks.

[Explanation of symbols]

1 inspection tool 2 Upper pipe 3 Intermediate pipe 4 Lower pipe 24,31,41 Pipe body 25, 32, 43 flange 51 electrode seat 52 electrode rod 53 Electrode holder T storage tank Ta ceiling wall g scale

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Eiji Nakai             1-22-1, Takakuradai, Suma-ku, Kobe City, Hyogo Prefecture F-term (reference) 2F014 AA05 AB01 DA01

Claims (4)

[Claims] 1. A transparent pipe main body, which is removably fixed to the ceiling wall facing an electrode seat fixed to the ceiling wall of the liquid storage tank, and has a transparent pipe body graduated at a set interval, An inspection tool for an electrode rod, which is closed and has an open upper end. 2. The pipe body is provided on an upper pipe having a fixed length, a lower pipe having a fixed length, and a plurality of kinds of intermediate pipes having different lengths, and the upper pipe and the lower pipe are connected to each other, or the upper pipe is connected. The electrode rod inspection tool according to claim 1, wherein one or more intermediate pipes are connected between the lower pipe and the lower pipe to form a set length corresponding to the height of the liquid storage tank. 3. The inspection tool for an electrode rod according to claim 2, wherein the upper pipe and the lower pipe are provided with valves each having a hose connection portion. 4. The inspection tool according to claim 1, wherein the upper end opening is detachably fixed to the ceiling wall, and then the electrode rod of the electrode holder is inserted into the inspection tool to fix the electrode holder to the electrode seat. Then
A method for inspecting an electrode rod, which comprises injecting a liquid into the inspection instrument to inspect the electrode rod.