JPH09138103A - Abrasion sensor in plant facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to issue a warning when the abrasion of constituent material progresses to a specified amount in a plant facility. SOLUTION: An insulating part 3 is formed in a base body 2 comprising conductive material. At the insulating part 3, an electrode 4, whose leading tip is protruding from the insulating part 3 and retarded from the tip of the base body 2, is provided. The inside of the base body 2, where the leading tip of the electrode 4 is protruding, is filled with conductive material. Thus, a concutor part 5 is formed. A circuit is formed of a lead wire 7a, which is connected to the electrode 4, a lead wire 7b, which is connected to the base body 2, and a display means A, which is linked to both lead wires. When the conductor part 5 is abrased and disappeared, the electrode 4 and the base body 2 are conducted, and the display means A issues the warning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wear sensor in a construction plant facility such as an asphalt plant, a mixture silo, a crushing plant, a recycling plant and the like.

[0002]

2. Description of the Related Art As is well known, in plant facilities, supply, heating, drying, sieving, storage, weighing, mixing, etc. of materials are carried out by consistent mechanical work. In various devices that perform the above-described steps, wear of the casing itself and the components of the wall and bottom such as the liner additionally provided for reinforcement occurs due to the contact of the materials. For this reason, as a conventional method for checking the wear state of each part, visual inspection and determination are performed using the production amount as a guide. That is, for example, in an asphalt plant, materials such as an aggregate, a bituminous mixture, and a carry-in device for a recycled material, a kneading device, and a chute in a storage device have been verified.

[0003]

However, using the production amount as a guide varies depending on the conditions. In addition, there are many places that cannot be verified by daily visual inspection, and holes may open suddenly, which may lead to a serious accident. In addition, a device for electronically measuring the thickness of each part has been conventionally known, but it is too costly to attach to various devices in a plant facility,
At present, it is rarely used. The present invention has been proposed in view of the above, when the wear progresses to a predetermined amount,
An object of the present invention is to provide a wear sensor that can issue a warning at low cost.

[0004]

In order to achieve the above object, the invention described in claim 1 is a wear sensor for detecting a wear state of a constituent material in a plant facility, which is insulated in a base made of a conductive material. And a part is formed on the insulating part.
An electrode having a tip protruding from the insulating portion and retracted from the tip of the base is provided, and the inside of the base facing the tip of the electrode is filled with a conductive material to form a conductive portion, thereby forming the electrode and the base. A circuit is formed by a lead wire which is electrically connected and is connected to the electrode, a lead wire which is connected to the base body, and a display means which is connected to both the lead wires, and the base body is embedded in a constituent material of a plant facility and is connected to the tip of the base body. Fix the components so that their surfaces are flush with each other, and when the components are worn and the base and conductive parts are worn and the electrodes are exposed, the conduction between the electrodes and the base is cut off. The circuit is opened, and the display means is activated by opening the circuit. Further, in the invention described in claim 2, a plurality of electrodes having different lengths are provided in the base body so that the electrodes can be displayed stepwise according to the degree of wear.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of an example of a wear sensor according to the present invention, and FIG. 2 is a sectional view showing an example of a mounted state. 3 is a cross-sectional view showing the progress of wear.

The wear sensor 1 according to the present invention is used, for example, in a chute, a hopper, a casing or the like in an asphalt plant factory, a cement plan factory, or the like, at a position where wear occurs on a wall or bottom constituent material of a plant facility. Deploy.

In the wear sensor 1, an insulating portion 3 is formed in a base body 2 made of a conductive material, and the tip of the insulating portion 3 projects from the insulating portion 3 and recedes from the front end of the base body 2. An electrode 4 is provided, and a conductive portion 5 is formed by filling the inside of the base 2 facing the tip of the electrode 4 with a conductive substance, so that the electrode 4 and the base 2 are electrically connected.

The substrate 2 is, for example, a metal pipe material having good conductivity such as iron or stainless steel,
In the illustrated embodiment, a male screw portion 21 for forming a fastening means is formed on the outer peripheral surface. The outer diameter of the base 2 is, for example, about 16 to 20 mm, and the length is appropriately set depending on the place of use. The base 2 is
Not only a pipe material but also a block material may be cut to form an empty portion.

An electrode 4 is provided inside the substrate 2 via an insulating portion 3. The electrode 4 is formed of an appropriate material such as an iron core or a copper rod. The tip of the electrode 4 slightly projects from the upper surface of the insulating portion 3 described later.

On the other hand, the insulating portion 3 can be formed of a suitable insulating material such as rubber, synthetic resin, or ceramic. In the embodiment shown in the drawings, it is formed as an insulating layer 3a that partitions the internal space of the base 2. Then, the electrode 4 described above penetrates through the insulating layer 3a.

In order to electrically connect the base 2 and the electrode 4 to each other, the conductive portion 5 is formed in the internal space of the base 2 from which the electrode 4 projects so as to electrically connect the base 2 and the electrode 4. The conductive material is preferably the same as the constituent material 6 of the plant to which the wear sensor 1 is attached, for example, the material forming the chute or liner, because the wear rate is the same. That is, iron or stainless steel is used. In order to fill the internal space with molten iron or stainless steel, it is necessary that the insulating portion 3 is made of ceramic or the like having high heat resistance. Alternatively, a conductor molded of a conductive substance may be fitted into the internal space to electrically connect the electrode 4 and the base body 2. On the other hand, in the case of the base body 2 in which the hole-shaped internal space is formed by cutting the block material, the insulating portion 3 and the electrode 4 may be formed in the internal space.

When the aggregate or the like handled in the plant is sufficiently larger than the wear sensor 1 and only the conductive substance filling the internal space of the base 2 is not likely to wear first, the conductive portion 5 is electrically conductive. You may utilize a resin etc.

The thickness of the conductive portion 5, that is, the substrate 2
The distance D from the tip of the to the upper surface of the insulating portion 3 becomes a dangerous state when the wear further proceeds, for example, the component 6
The thickness P is set to about 2/3. By changing the position of the insulating layer 3a and changing the thickness of the conductive portion 5, it is possible to correspond to the constituent materials 6 having various thicknesses. In the illustrated embodiment, the thickness D of the conductive portion 5 and the thickness d of the insulating layer 3a is set to about 12 mm, which is the same as the thickness P of the liner on which the wear sensor 1 is arranged. I am doing it. That is, the thickness d of the insulating layer 3a is set to about 4 mm, and the thickness D of the conductive portion is set to about 8 mm. The length of the substrate 2 can be set arbitrarily.

A lead wire 7a is connected to the electrode 4 described above. The lead wire 7b is also connected to the base body 2. In the illustrated embodiment, both lead wires 7a and 7b are passed through the inside of the base body 2 and hardened with resin 8. Therefore, the lead wire 7 is not likely to be cut and is easy to handle.

A display means A is provided at the tip of the lead wires 7a and 7b to form a circuit. The simplest one of the display means A is a lamp having a power source. However, if it is set so as to operate based on an OFF signal generated when the conduction between the electrode 4 and the substrate 2 is cut off, as will be described later. It may have any configuration.

The wear sensor 1 having the above-mentioned configuration is attached to an appropriate position of various devices constituting the plant facility.
When mounting, various devices are provided with screw holes 61, and the male screw portions 21 formed on the outer peripheral surface of the base 2 are screwed into the screw holes 61. Then, at a position where the upper end surface of the base body 2 and the surface of the constituent member 6 are flush with each other, they are fixed by a double nut 9 as an example of fastening means.

By fixing the wear sensor 1 in this manner, the component 6 can be easily attached even at different positions. Further, since it is fixed by the double nut 9, the screw is not loosened.

In the illustrated embodiment, screws are used, but mounting holes may be provided at the mounting positions of the constituent members 6 in various devices, and the base body 2 may be fitted into these mounting holes. For example, they can be welded or combined with an adhesive.

Next, the operation of the wear sensor 1 according to the present invention constructed as above will be described. The material 10 such as an aggregate collides with the constituent material 6 such as a chute or a liner and is abraded.
Then, as the abrasion progresses, as shown in FIG. 3, the conductive portion 5 made of a conductive material disappears, and the insulating layer 3a, that is, the electrode 4 is removed.
When exposed, the conduction between the base 2 and the electrode 4 is lost. Therefore, the electrode 4, the base 2, the lead wire 7b of the base 2,
The circuit formed by the display means A and the lead wire 7a of the electrode 4 is opened. In other words, the circuit is turned off and an off signal is generated in the display means A.

Then, by utilizing this OFF signal, various display means A are operated. That is, as described above, the simplest display means A is a lamp having a power source, and when abrasion progresses and the insulating layer 3a is exposed, the circuit is opened and the lamp is extinguished. Seeing that this lamp goes off,
It is possible to detect the progress of wear.

Further, by using the above-mentioned off signal, it is possible to turn on a warning lamp as the display means A or emit an alarm sound. Further, it is possible to set the operation of the plant to be stopped when the off signal is generated.

In the plant facility provided with the wear sensor 1 as described above, by monitoring the display means A, the progress of wear can be grasped without being affected by the production amount, and maintenance and inspection is facilitated. Become. Also, in daily patrol,
By arranging the wear sensor 1 at a position where it cannot be visually observed, there is no possibility that wear has progressed without knowing it. Further, it is not necessary to stop the operation of the plant in order to verify the progress of wear. Then, it is possible to prevent a dangerous situation in which the plant suddenly collapses due to the progress of wear without realizing it.

FIG. 4 is a sectional view showing another embodiment of the wear sensor 1 according to the present invention. In this embodiment,
Three electrodes 41, 42, 43 having different lengths are provided on the insulating portion 3 having different thicknesses. That is, three insulating layers 31, 32, 33 having different thicknesses are formed inside the conductive substrate 2, and each insulating layer 31, 32, 33 has three electrodes 41 having different lengths. , 42, 43 are provided, and the base 2 is filled with a conductive substance to form the conductive portion 5, so that the electrodes 4 are electrically connected to the base 2.

Further, each electrode 4 ...
1, 72, 73 and 7b are connected, and the display means A is connected to the end of the lead wire 7 ... to form a circuit.

In this embodiment, as the wear progresses, the electrodes 4 are exposed in the order of increasing the thickness of the insulating portion 3, that is, decreasing the thickness of the conductive portion 5, and the electrical continuity between the base 2 and the electrode 4 is gradually established. Will be lost. Therefore, for example, it is possible to rank “safety”, “caution”, and “danger” according to the progress of wear. It is also possible to control the operating state of the plant according to the signal emitted by each electrode 4, such as "normal operation", "caution operation", and "operation stop".

In the illustrated embodiment, a pipe material is used for the base 2 to form the three electrodes 4 in one pipe, but a plurality of bases 2 having different depths are formed in the block material. Holes may be formed, and the electrodes 4 may be provided in these holes, respectively. Also in such an embodiment, the electrode 4 is made to respond in a stepwise manner as the wear progresses, so that the progress of the wear can be monitored.

FIG. 5 is a schematic view of a batcher plant showing an arrangement example of the wear sensor 1 according to the present invention. In this plant, the material carried in from the belt conveyor B is distributed by the distributor C to each material storage bin E .... Also, various cements are introduced into each cement bottle F. Then, a predetermined amount of material is weighed by each of the weighing machines G ... And introduced into the collector hopper H. In the mixer J, the above materials are mixed, placed on the truck M from the wet batch hopper K, and carried out.

Therefore, in this plant, the wear sensors 1 are arranged on the inclined surfaces of the distributor C, the bins E and F, the weighing machines G, the hoppers H and K, and the mixer J, respectively. As described above, the wear sensor 1 according to the present invention can be arranged at an appropriate position, and can also be arranged at a position that is not normally visible, and the progress of wear can be constantly monitored.

Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments and can be appropriately implemented without changing the configurations described in the claims. For example, the plurality of electrodes having different lengths is not limited to three. Further, holes having different depths may be formed in the base, and electrodes may be formed in the holes.

[0030]

In summary, the present invention is a wear sensor for detecting the wear state of components in a plant facility, wherein an insulating portion is formed in a base made of a conductive material, and the insulating portion has a tip. An electrode projecting from the insulating portion and receding from the tip of the base is provided, and the inside of the base facing the tip of the electrode is filled with a conductive substance to form a conductive portion, thereby electrically connecting the electrode and the base. , A lead wire connected to the electrode, a lead wire connected to the base body, and a display means connected to both the lead wires to form a circuit, and the base body is embedded in the constituent material of the plant facility, and the tip of the base body and the constituent material The circuit is fixed so that the surface of the electrode is flush with the surface of the component, and when the components and the base body and the conductive portion wear and the electrodes are exposed, the conduction between the electrode and the base body is cut off. Is opened and the above circuit is opened. Accordingly, since the display means is adapted to operate, by monitoring the display unit, without being affected by the production, it is possible to grasp the progress of wear, it is easy maintenance. Further, the degree of wear can be finely displayed by laminating the insulating layers and providing a plurality of electrodes. The wear sensor according to the present invention has a simple structure, can be manufactured at low cost, and has a high yield.
In addition, since the signal output from the wear sensor is a so-called b-contact signal that turns off, it is possible to manufacture an application with peripheral devices relatively easily, can be applied to various devices, and is of high practical value. .

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a wear sensor according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a mounted state of a wear sensor.

FIG. 3 is a cross-sectional view showing the progress of wear.

FIG. 4 is a cross-sectional view showing another embodiment of the wear sensor.

FIG. 5 is a schematic view of a batcher plant showing an example of arrangement of wear sensors.

[Explanation of symbols]

 1 Wear Sensor 2 Base 3 Insulation 4 Electrode 5 Conductive 6 Component 7 Lead Wire

Claims (2)

[Claims] 1. A wear sensor for detecting a wear state of a constituent material in a plant facility, wherein an insulating portion is formed in a base made of a conductive material, and the tip of the insulating portion is projected from the insulating portion. An electrode that is recessed from the tip of the base is provided, and a conductive portion is formed by filling the inside of the base facing the tip of the electrode with a conductive substance to electrically connect the electrode and the base, and a lead connected to the electrode A circuit is formed by the wire, the lead wire connected to the base body, and the display means connected to both lead wires, and the base body is embedded in the constituent material of the plant facility so that the tip of the base body and the surface of the constituent material are flush with each other. When the electrodes are exposed due to the abrasion of the components and the abrasion of the base and conductive parts, the circuit is opened to cut off the conduction between the electrode and the base. By opening the display means Wear sensors in the plant facilities, characterized in that so as to operate. 2. A plurality of electrodes having different lengths are provided in a substrate,
The wear sensor in a plant facility according to claim 1, wherein the wear sensor can be displayed stepwise according to the degree of wear.