JPH05288593A - Level gage using single type multielectrode - Google Patents

Abstract

PURPOSE:To provide a multielectrode type level gage which can cope easily even with a change in a liquid level to be detected and by which a constitution can be simplified and which is excellent in assembling performance of the level gage itself and installation performance to a water tank in the level gage being installed in the water tank and so on. CONSTITUTION:A plurality of conductors 13, 15, 17 and 19 having respective hollow parts are connected/fixed in a linear shape to the first conductor 11 which is derived from a terminal box 2 and has a hollow part by interposing insulating spacers 12, 14, 16 and 18 between the respective conductors. A level gage formed by using a monotypic multielectrode is constituted in such a way that the respective conductors 11, 13, 15, 17 and 19 and the terminal box 2 are connected electrically to each other by forming wirings 21, 22, 23 and 24 while using the hollow parts formed in the respective conductors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-electrode type liquid level meter which is installed in various water tanks and detects the liquid level of a liquid flowing into the water tank.

[0002]

2. Description of the Related Art As a conventional liquid level meter,
The structure shown in the conceptual diagram of FIG. 7 is generally adopted. That is, the floatless relay 10 arranged above the water tank 1.
From the connection cables 10a, 10b, 10c,
The terminal box 2 is connected to the terminals 10d and 10e, and the vertical lengths of the terminal box 2 correspond to the liquid levels to be detected from the terminal box 2 through the plurality of conductors 3a, 3b, 3c, 3d and 3e. Different electrodes 4a, 4b, 4c, 4d, 4e are integrally fixed. 4a is a common electrode, 4b, 4c, 4d, 4e
Are electrodes for detecting the level of the liquid flowing into the water tank 1.

According to such a level gauge, the current of the power source A passes from the conductors 3b, 3c, 3d and 3e to the electrodes 4b, 4c, 4d and 4e having different lengths and passes through the liquid and the common electrode 4a. Since it flows to the earth E, the liquid level corresponding to the amount of the inflowing liquid can be detected by the positions of the lower ends of the electrodes 4b, 4c, 4d, 4e.

[0004]

However, in such a conventional liquid level meter, it is not possible to easily deal with the case where the liquid level to be detected in a water tank or the like becomes large, and the liquid level is also low. There is a problem that the structure of the meter itself becomes complicated and many problems occur in terms of installation space and handling.

That is, the example shown in FIG. 7 is a case of a liquid level meter having a 5P electrode. As a concrete structural example, as shown in FIG. 8, the lengths extending from the terminal box 2 are L _{0 respectively.} , L ₁ ,
_{L 2, L 3, L 4} 5 pieces of electrodes 4a with, 4b, 4c, 4
The d and 4e are electrically separated and assembled by using separators 5 and 6 that prevent mutual electrical contact. The separators 5 and 6 have a function as a reinforcing member for each electrode in addition to the function of preventing electrical contact.

Therefore, when the liquid level to be detected in the liquid flowing into the water tank 1 is increased, the electrode 4 is naturally used.
It is necessary to further increase the number of a, 4b, 4c, 4d, and 4e, and as a result, the assembly work using the separator becomes complicated, and the liquid level meter itself is enlarged, and the liquid level in the water tank 1 is increased. This results in an increase in the installation space occupied by the total.

Further, the longer the total length of L ₀ shown in the figure, the more susceptible it is to resistance to the movement of the liquid.
There is a problem that the installation method for the aquarium 1 becomes difficult.

Therefore, the present invention solves the problem of such a conventional liquid level meter and can easily cope with an increase in the liquid level to be detected, and the structure does not become complicated. It is an object of the present invention to obtain a multi-electrode electrode type liquid level meter which is easy to assemble the liquid level meter itself and installable in a water tank.

[0009]

In order to achieve the above object, the present invention first derives a conductor having a hollow portion from a terminal box according to claim 1, and interposes insulating spacers on the conductor. A plurality of conductors each having a hollow portion are connected and fixed in a straight line, and wiring is performed by utilizing the hollow portions formed in each conductor to electrically connect the conductors to the terminal box. It is composed of a scale.

According to a second aspect of the present invention, an insulator having a hollow portion is led out from the terminal box, and a plurality of electrodes each made of a conductor are provided on the outer wall surface of the insulator while keeping a certain space therebetween. A sheet is attached, and wiring is performed by utilizing a hollow portion formed in the insulator, thereby forming a liquid level meter electrically connecting the electrode sheets and the terminal box, and further comprising: 3, an insulator having a hollow portion is led out from the terminal box, and an electrode sheet made of a conductor is attached to the outer wall surface of the insulator, and the insulator has a similar hollow portion to the outside. By connecting and fixing a plurality of insulators, each having an electrode sheet made of a conductor attached to a wall surface, in a straight line, and wiring by utilizing the hollow portion formed in each insulator, the above-mentioned electrode sheets and terminals Characterized by being electrically connected to the box It is the structure of the liquid level meter using the Ichikatachi multipolar electrode.

[0011]

According to the liquid level gauge of the present invention, since each conductor and the terminal box are connected by the wiring utilizing the hollow portion, the conductor portion has a single rod-shaped body from the appearance. Since it is substantially equal to, and the number of conductors can be increased / decreased, it is possible to easily deal with the change of the liquid level to be detected. When installed in a water tank or the like, the liquid level corresponding to the distance from the terminal box to each conductor can be electrically detected.

According to the liquid level gauge of the second aspect, since each conductor and the terminal box are connected by utilizing the hollow portion formed in the insulator, it is apparently equivalent to one rod-shaped body. In addition, the length of the insulator and the size and number of the electrode sheets can be freely changed, and the change of the liquid level to be detected can be easily dealt with. When installed in a water tank or the like, the liquid level corresponding to the distance from the terminal box to each electrode sheet can be electrically detected.

Further, according to the liquid level gauge of the third aspect, each conductor and the terminal box are connected by utilizing the hollow portion formed in the insulator, which corresponds to the distance from the terminal box to each conductor. It is possible to electrically detect the level of liquid to be discharged. Further, the lengths of the plurality of insulators can be appropriately changed according to the liquid level detection level required for the water tank or the like, and the insulators can be increased or decreased as necessary and should be detected. Changes in the liquid level can be easily dealt with.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of a liquid level gauge using a single type multipolar electrode according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic view for explaining a first embodiment of the present invention. In the figure, 2 is a terminal box, and a lower surface of the terminal box 2 is a first pipe composed of a hollow pipe. The conductor 11 is led out. Then, at the lower end of the first conductor 11,
A second conductor 13 formed of a similar hollow pipe is connected and fixed via a spacer 12 formed of an insulator. Based on the same connection mode, the third conductor 15, the fourth conductor 17, and the fifth conductor 19 each having a hollow portion with the spacers 14, 16, 18 formed of an insulating material interposed therebetween will be described below. It is connected and fixed in a straight line.

The conductors 13, 15, 17, 19 and the terminal box 2 are connected to the wirings 21, 2 by utilizing the hollow portions in the conductors.
It is electrically connected by 2, 23, 24. The first conductor 11 is directly electrically connected to the terminal box 2. A waterproof cap 25 is fitted to the lower end of the fifth conductor 19 to prevent water from entering the hollow portions of the conductors.

Each of the above conductors 11, 13, 15, 17, 1
The length of 9 can be appropriately changed according to the liquid level detection level required for a water tank or the like, and the connecting portion between the conductors can be freely removed. Therefore, it is possible to adopt an embodiment in which each conductor is reduced or added as needed, or the length of the conductor is changed in accordance with the change of the liquid level detection level.

The conductors 11, 13, 15, 17, 19
A circular pipe made of metal or the like is suitable, but the shape and material of the conductor are not particularly limited, and the material may be appropriately changed according to the type of liquid to be measured. Further, in terms of shape, a square conductive pipe can be used instead of the circular pipe.

2 to 4 show concrete structural examples of each portion in the first embodiment. That is, a plurality of lead wires 27, 28, 29 are provided from the side of the terminal box 2 shown in FIG.
... have been introduced, and these lead wires 27, 28, 29 ...
.. is the wiring 2 via the screws 30, 31, 32 for wiring
1, 22, 23 ...

FIG. 3 shows the first conductor 11 and the second conductor 1.
3 shows an example of a connection portion with the third conductor. In the case of the illustrated example, the first conductor 11 is fixedly provided with the connection nut 11a, and the second conductor 13 is made of an insulator. It is composed of a joint portion 13a and a plurality of contacts 13b protruding from the joint portion 13a. 13c is a lock nut, and 33 and 34 are tightening bolts attached to the connection nut 11a.

A threaded portion is engraved on the surface of the connecting portion 13a. In addition, the plurality of contacts 13b are the wirings 21 arranged in the hollow portions of the conductor 11 and the conductor 13.
It is used as a conductor for connecting 22, 23, 24 to any of the lead wires 27, 28, 29, .... Therefore, one of the contacts 13b and the second conductor 13 are electrically connected.

After the required wiring is connected by using the contact 13b, the spacer 12 made of an insulator is interposed as shown in FIG. 4 to connect the connecting portion 13a on the second conductor 13 side. Is fixed while being screwed into the connection nut 11a on the first conductor 11 side, and fixed by the lock nut 13c,
The fastening action of the fastening bolts 33 and 34 connects and fixes the first conductor 11 and the second conductor 13. By performing the above-described assembly, a connection structure in which the first conductor 11 and the second conductor 13 are connected in an insulated state via the spacer 12 and the wiring can be electrically connected by the contact 13b is provided. can get.

The connecting portion between the second conductor 13 and the third conductor 15 is also the same as above, and further, the third conductor 15 and the fourth conductor 17 and the fourth conductor 17 and the fifth conductor 19 are connected. The structure of the connecting portion and the connecting portion of the similar conductors, which are sequentially added as needed, is the same. The structure of the connection portion shown in FIGS. 3 and 4 shows a preferred embodiment of the present embodiment, and connection modes other than the above are optional.

According to such a level gauge, each conductor 11,
Wirings 21, 2 are provided between 13, 15, 17, 19 and the terminal box 2.
2, 23, and 24, the distance from the terminal box 2 in the water tank or the like is L ₀ , L ₁ , shown in FIG.
It is possible to electrically detect the liquid level of each of L ₂ , L ₃ and L ₄ . Moreover, each conductor 11, 13, 15, 17,
19 is linearly connected through the spacers 12, 14, 16, and 18, and the wirings 21, 22, 23, and 24 are provided by utilizing the hollow portion in each conductor, and therefore, from the appearance. Since the shape of the conductor is almost the same as that of one rod, the structure of the level gauge itself does not become complicated even if the level of liquid to be detected increases, and the installation space in a water tank, etc. Also has the characteristic that it is not a problem.

FIG. 5 is a schematic view for explaining the second embodiment of the present invention. In the figure, 2 is a terminal box, and the bottom surface of the terminal box 2 is a hollow pipe. Insulator 35
Has been derived. Then, on the outer wall surface of the insulator 35,
Electrode sheets 36, 37, 38, 39 composed of conductors,
40 are attached to each other with a certain space maintained therebetween.

Utilizing the hollow portion in the insulator 35, the electrode sheets 36, 37, 38, 39, 40 and the terminal box 2 are electrically connected by the wirings 41, 42, 43, 44, 45. ing. Further, a waterproof cap 25 is fitted to the lower end of the insulator 35 to prevent moisture from adhering to the insulator 35.
To prevent it from entering the hollow part of the.

As the above-mentioned insulator 35, for example, an insulating synthetic resin or ceramic is adopted, but the material is appropriately selected depending on the kind of liquid to be measured. Each electrode sheet 3
The lengths of 6, 37, 38, 39, 40 can be appropriately changed according to the liquid level detection level required for a water tank or the like. If necessary, the length of the insulator 35 itself can be changed, or each electrode can be changed. It is also possible to reduce the number of seats 36, 37, 38, 39, 40 or to add more seats.

According to the second embodiment, each electrode sheet 36, 37, 38, 39, 40 and the terminal box 2 are connected by the wiring 4.
Since they are connected by 1, 42, 43, 44 and 45, it is possible to electrically detect the liquid level of each of the distances L ₀ , L ₁ , L ₂ , L ₃ and L ₄ from the terminal box 2. It is possible. The insulator 35 has a linear shape, and the wirings 21, 22, 23, and 24 are provided by utilizing the hollow portion of the insulator 35, and thus the insulator 35 has a single rod-like appearance from the outside. Even if the liquid level to be detected increases, it can be dealt with by increasing the number of electrode sheets attached, so the structure of the liquid level meter itself is simplified, and the installation space in the water tank etc. can be small. There is.

FIG. 6 is a schematic view for explaining the third embodiment of the present invention. In the case of the present embodiment, the first insulator 47 composed of a hollow pipe is led out from the lower surface of the terminal box 2. The electrode sheet 36 made of a conductor is attached to the outer wall surface of the first insulator 47. Then, a second insulator 48 formed of a similar hollow pipe is connected and fixed to the lower end portion of the first insulator 47, and an electrode formed of a conductor is formed on the outer wall surface of the second insulator 48. The sheet 37 is attached. Hereinafter, based on a similar connection mode, the third insulator 4
The ninth, fourth, and fifth insulators 50, 51 are linearly connected and fixed, and the electrode sheets 38, 39, 40 are attached to the outer wall surfaces of the respective insulators 49, 50, 51. The electrode sheets 36, 37, 38, 39, 40 are adhered to each other while keeping a constant space.

As in the first and second embodiments, each insulator 4
Utilizing the hollow part inside 7,48,49,50,51,
Each electrode sheet 36, 37, 38, 39, 40 and terminal box 2
And are electrically connected by wiring (not shown).
The waterproof cap 2 is attached to the lower end of the fifth insulator 51.
5 is fitted.

The above-mentioned first to fifth insulators 47, 48, 4
The lengths of 9, 50, 51 can be appropriately changed according to the liquid level detection level required for a water tank or the like, and can be reduced or expanded as needed. Further, the structure of the connection portion of each insulator may be set arbitrarily,
It is optimum to apply the connection structure described in FIGS. 3 and 4 in the embodiment.

According to the third embodiment, the liquid surface and the terminal box 2 are formed by the electrode sheets 36, 37, 38, 39 and 40.
It is possible to electrically detect each liquid level of L ₀ , L ₁ , L ₂ , L ₃ , and L ₄ at a distance from the electrode sheet, even if the liquid level to be detected increases. This can be dealt with by increasing the deposited insulator. And like the first and second embodiments, each insulator 47, 48, 49, 50,
Terminal box 2 and electrode sheet 3 using the hollow part inside 51
Since the wiring with 6, 37, 38, 39, 40 is made, the external shape is almost the same as one rod-like body, and therefore even if the liquid level to be detected increases, the level gauge It has the characteristic that the structure of itself does not become complicated and the installation space in a water tank is not a problem.

[0033]

As described in detail above, according to the liquid level meter using the single type multipolar electrode according to the present invention, in any of the cases of claims 1, 2 and 3, Since the conductor or electrode sheet and the terminal box are connected by wiring using the hollow part, the shape from the outside is almost the same as a single rod-shaped body, enabling overall weight reduction and easy handling. In addition, there is an effect that the installation space as a liquid level gauge in a water tank or the like can be small.

Furthermore, since conductors, electrode sheets, insulators, etc. can be increased and decreased freely, it is possible to easily cope with changes in the liquid level to be detected. It is possible to electrically detect the liquid level corresponding to the position of, or the distance to the attachment position of the electrode sheet.

Further, when the liquid level gauge is assembled, a member such as a separator for multi-electrode which is conventionally required for the purpose of maintaining insulation and strength is not required, and a hollow conductor or insulator has a predetermined structure. Since the strength is maintained, it exerts an effect that it is hardly affected by the fluid to be measured.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main part of the first embodiment.

FIG. 3 is an exploded view showing a conductor connection structure in the first embodiment.

FIG. 4 is an assembly diagram showing a conductor connection structure in the first embodiment.

FIG. 5 is a schematic diagram for explaining a second embodiment of the present invention.

FIG. 6 is a schematic diagram for explaining a third embodiment of the present invention.

FIG. 7 is a schematic diagram for explaining the concept of a conventional liquid level gauge.

FIG. 8 is a front view showing a specific example of a conventional liquid level gauge.

[Explanation of symbols]

2 ... Terminal box, 11, 13, 15, 17, 19 ... (hollow) conductor, 12, 14, 16, 18 ... Spacer 21,
22, 23, 24, 41, 42, 43, 44, 45 ... Wiring, 25 ... Cap, 27, 28, 29 ... Lead wire, 3
5, 47, 48, 49, 50, 51 ... (Hollow) insulator, 36, 37, 38, 39, 40 ... Electrode sheet.

Claims (3)

[Claims] 1. A conductor having a hollow portion is led out from a terminal box, and a plurality of conductors each having a hollow portion are linearly connected and fixed to the conductor by interposing insulating spacers to each other. A liquid level meter using a single-type multipolar electrode, characterized in that the conductors are electrically connected to the terminal box by wiring using the formed hollow portion. 2. An insulating body having a hollow portion is led out from a terminal box, and a plurality of electrode sheets each made of a conductor are attached to the outer wall surface of the insulating body while keeping a constant space therebetween. , A liquid level meter using a single-type multi-pole electrode, characterized in that the respective electrode sheets and the terminal box are electrically connected by wiring using the hollow portion formed in the insulator. .. 3. An insulator having a hollow portion is drawn out from the terminal box, and an electrode sheet made of a conductor is attached to the outer wall surface of the insulator, and the insulator has a similar hollow portion. Each electrode sheet is formed by connecting and fixing a plurality of insulators, each of which has an electrode sheet made of a conductor attached to the outer wall surface, in a straight line, and wiring using the hollow portion formed in each insulator. And a terminal box are electrically connected to each other, which is a liquid level meter using a single-type multipolar electrode.