KR20160050451A - Plugging switch of chute - Google Patents

Abstract

The present invention relates to a plugging switch of a chute for transferring a raw material including coal. The purpose of the present invention is to prevent a loss caused by blocking of the chute by quickly detecting stuck ores or uneven loading of a raw material in a chute supplying a raw material such as coal or the like. The plugging switch of the chute for transferring a raw material including coal according to the present invention comprises: a detecting rod (10) installed to pass through a through hole (2) formed in the box-shaped chute (1) installed in the transfer route of all materials including coal from the outside of the chute to the inside thereof, and moving above the raw material due to stuck ores attached to the chute or uneven loading of the raw material; an elastic member mounted on the outside of the chute and elastically supporting the detecting rod in an initial state; a stopper (20) mounted on the outside of the chute, allowing the detecting rod to move above the raw material due to the stuck ores or uneven loading, but stopping the detecting rod to move under the raw material; a cam-shaped knob (40) mounted on an outer end of the chute of the detecting rod; a switch (50) separated from the knob at a predetermined distance and providing a signal of the stuck ores or uneven loading when a contact point is changed by the displacement of the knob when the detecting rod moves above the raw material; an alarm means outputting an alarm when the stuck ores or uneven loading is provided by the switch; and a case (60) which is mounted on the outside of the chute to be able to be separated and on which the stopper, the elastic member, the knob, and the switch are mounted.

Description

[0001] PLUGGING SWITCH OF CHUTE [0002]

[0001] The present invention relates to a plugging switch for a raw material transferring chute containing coal, and more particularly to a plugging switch of a raw material transferring chute for transferring a raw material (coal or the like) To a plug for feeding a raw material containing coal.

Generally, a thermal power plant is provided with a chute so that raw materials can be smoothly supplied to a connection portion between conveyors for conveying raw materials such as coal and limestone.

The chute guides the raw material from the upper conveyor to the lower conveyor. When a raw material containing a large amount of water flows into the chute, the raw material is fixed inside and clogging occurs for a long time.

If the unloading of coal or the plugging (clogging of the chute) occurs at the time of shipment, a serious disruption occurs in the supply of coal, so that the plugging is solved, which usually takes 6 hours or longer.

In order to solve such a problem, a plugging detection device is applied, for example, a pressure switch installed on the inner wall of a chute. However, there is a problem that the pressure switch takes a long time to recover because the active speed is slow.

As a plugging detection technique, there is the following patent document.

Patent Document 1 (Japanese Patent No. 10-1237062) discloses a belt conveyor including a duct portion disposed at an end of a belt conveyor and guiding a conveyed object dropped through the belt conveyor; A sensing unit provided in the duct unit for sensing accumulation of the conveyed material; And a control unit coupled to the sensing unit to control driving of the belt conveyor, wherein the duct unit comprises: an upper plate positioned above the belt conveyor; A side plate connected to the upper plate and surrounding an end of the belt conveyor; And a lower plate connected to the side plate and guiding the conveyed object, wherein the sensing unit is coupled to the upper plate and is rotated by being pushed by the conveyed object; A moving part connected to the rotating part and moving up and down through the upper plate; And a sensor for sensing the contact with the moving unit and transmitting a sensing signal to the control unit. The clogging can be detected by rotating the contact plate when the chute is clogged and changing the contact point of the sensor by rotation of the contact plate. There is a problem that the contact plate is rotated in the direction opposite to the clogging detection due to the raw material conveyed along the conveyor and is broken and the contact plate is installed in the direction of preventing the transfer of the raw material in terms of the raw material supply, .

Patent Document 2 (No. 10-1421884) discloses a chute detection device for detecting attachment light or knitting occurrence in a chute for supplying a raw material. The chute detection device includes a chute, An operation unit which is installed to penetrate through the chute and which can be tilted in all directions (all directions) by the attachment light or the knitting in the chute; And a sensing unit for sensing the operation of the operation unit. The sensing rod is installed vertically in the vertical direction, and operates even under the condition that the sensing light is not aligned with the mounting light.

Patent Document 3 (Japanese Patent Application No. 10-0792843) discloses a hose which is provided with a through hole formed in a lower side of a chute for supplying a raw material and a hinge which is rotatably mounted on an outer side of the chute, And a limit switch installed on the outer side of the chute so as to be operated by the touch bar, wherein the sensing plate is installed on the sensing plate, There is a problem that it is not possible to detect the occurrence of adhering light or a piece to the side.

Patent No. 10-1237062 Registration No. 10-1421884 Registration No. 10-0792843

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for preventing the loss of clogging of a chute, And to provide a plugging switch of a sucking material feeding hopper.

The plugging switch of the coal feed hopper according to the present invention is installed so as to penetrate from the outside to the inside through a through hole formed in a box-shaped chute installed in a feeding path of all the raw materials including coal, A detection bar which moves only to the upper part by attachment light or a piece attached to the chute; An elastic member mounted outside the chute and elastically supporting the sensing rod in an initial state; A stopper mounted on the outside of the chute and allowing the detection rod to move only to the upper portion by the light or the knitting of the detection rod while preventing the detection rod from moving downward; A cam-shaped knob mounted on an end of the sensing rod outside the chute; A switch which is spaced apart from the knob by a predetermined distance and changes its contact point by a displacement of the knob according to an upward movement of the sensing rod to provide a signal of attachment light or a variation; An alarm means for outputting an alarm in the case of an attached light or a piece of signal by the switch; And a case detachably mounted to the outside of the chute and having the stopper, the elastic member, the knob and the switch mounted therein.

According to the plugging switch of the feed hopper for coal containing coal according to the present invention, the sensing rod is configured to be movable only to the upper portion through the stopper so as to accurately and quickly detect the adhering light or piece, and only the sensing rod is disposed inside the chute So that it is possible to prevent the drop of the raw material or the damage caused by the adhering light or knitting, thereby prolonging the service life.

In addition, when the detection induction plate is applied, the detection rod is minimized to smoothly supply the raw material, while preventing the clogging of the chute by detecting the adhered light or the swiftness more quickly, resulting in a great economic loss due to clogging of the chute Prevent in advance.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a state in which a plug of a feed conveying chute for coal containing coal according to the present invention is installed. Fig.
Fig. 2 is a front view of a plugging switch of a raw material transfer chute containing coal according to the present invention. Fig.
Fig. 3 is a perspective view of a plugging switch of a raw material transfer chute containing coal according to the present invention
FIG. 4 is a perspective view showing a sensing induction plate applied to a plug of a feed conveying chute containing coal according to the present invention. FIG.
Fig. 5 is an operational view of a plugging switch of a feed hopper for coal containing coal according to the present invention. Fig.

As shown in FIGS. 1 and 2, the plugging switch 100 of the feed hopper for feedstock containing coal according to the present invention includes a box-like chute 1 (see FIG. 1) installed in a feed path of a raw material The sensing rod 10 is installed in the chute 10 and detects the light or the knot in the chute 10. The sensing rod 10 can sense only the direction or the upward movement of the sensing rod 10, A coil spring 30 as an elastic member for holding the sensing rod 10 in an initial state, a knob 40 for generating a displacement by upward movement of the sensing rod 10, a knob 40 A switch 50 for changing the contact point to generate a signal of attachment light or a variation signal on the basis of the displacement of the switch 1, a stopper 20, a coil spring 30 and a knob 40 on the outside of the chute 1 A case 60 for protecting them, and an alarm based on a change in the contact point of the switch 50 Is configured as an alarm output means for, at least one is provided on the inside of the chute (1).

The sensing rod 10 is disposed in the interior of the chute 1 and has a length and a diameter capable of sensing adhered light or artifacts in a wide area. The sensing rod 10 does not interfere with the falling of the raw material from the upper portion, A curved or circular cross-section rod is preferred, and of course the upper portion is curved and the bottom portion is also flat.

The sensing rod 10 is inserted through the through hole 2 formed in the chute 1 from the outside to the inside of the chute 1.

If the cross-sectional area of the sensing rod 10 is too large, the raw material may be prevented from dropping from the upper portion and the raw material may be stacked on the upper portion to cause breakage. Therefore, there is a limit to increase the size of the sensing rod 10, It is difficult to detect the attachment light or the deviation in all the portions of the sensing plate 70. In order to solve the problem, the sensing plate 70 (shown in FIG. 4) .

The sensing guide plate 70 has a structure in which the sectional area of the sensing rod 10 is larger than that of the sensing rod 10 so as to detect the adhered light or the flatness of the sensing rod 10 without interfering with the drop of the raw material, And one or more of the upper and lower portions of the sensing rod 10 are preferably provided on one side, preferably on the lower side.

According to the combination of the sensing rod 10 and the sensing guide plate 70, the sensing rod 10 can be prevented from being excessively large, There is an advantage that the raw material can be supplied.

The stopper 20 is configured to prevent the detection rod 10 from moving downward due to falling of the raw material while preventing the upward movement of the detection rod 10 due to attachment light or knitting, (Circular, square, etc.) in which a rod receiving hole 21 is provided and a jaw 22 for preventing downward movement of the sensing rod 10 is formed below the sensing rod receiving hole 21.

The stopper 20 is mounted on the case 60, that is, the plugging switch 100 of the present invention is set so that the on-site installation is very easy. The installation is completed by drilling the through hole 2 in the chute 1 and inserting the sensing rod 10 through the through hole 2 from the outside to the inside and fixing the case 60 to the chute 1. [

The detection rod 10 penetrates the detection rod receiving hole 21 of the stopper 20 and the bottom is supported on the jaw 22 of the stopper 20. The sensing rod 10 can not move downward but only move upward in the sensing rod receiving hole 21 on the support structure of the sensing rod 10 and the jaw 22 and the support structure of the coil spring 30. [

The sensing rod 10 may not be raised on the upper surface of the jaw 22 in its initial state but may be disposed on the upper portion with a slight gap therebetween. Since the sensing rod 10 moves downward through the gap, Of the contact point.

Although the jaw 22 is illustrated as being the thickness of the stopper 20, the jaws may be formed thicker than the other portions of the stopper 20 and formed at two or more positions.

The coil spring 30 is inserted into the case 60 and is interposed between the knob 40 and the inner wall of the case 60 to rotate the knob 40 and the sensing rod 10 And is elastically supported in an initial state.

The coil spring 30 has a shape in which the diameter of the coil spring 30 gradually increases toward the knob 40. This is effective in increasing the displacement of the knob 40 when the sensing rod 10 is moved upward.

The knob 40 is displaced while the outer end of the sensing rod 10 is fixed and moves downward (upward movement is possible) by upward movement of the sensing rod 10, And moves downward by rotation as it moves upward.

The knob 40 is preferably cam-shaped so as to generate displacement by upward movement of the sensing rod 10 by adhering light or knob to operate the switch 50.

For example, the knob 40 may have a nut groove formed on one side of the knob 40 and a screw thread may be formed on the outer circumferential surface of the outer end of the sensing rod 10 to connect the sensing rod 10 Screwed to the knob 40 to engage. Of course, the coupling structure of the knob 40 and the sensing rod 10 is not limited to this, and can be variously implemented.

The switch 50 is installed at a position where the contact is changed by the displacement of the knob 40 as the inner wall of the case 60 and is moved by the knob 40 when the detection rod 10 is moved upward All the changing products are available.

The case 60 can be used either in a box in which the remaining portion except for the protruding portion of the sensing rod 10 is sealed or in one side open box in which one side is blocked by the stopper 20, A divided structure of the opened case body and the cover detachably coupled to the opened portion of the case body is also possible. The case 60 of the divided structure is preferably provided with a stopper 20 and a coil spring 30 on the case body and a switch 50 on the inner surface of the case. And the position of the switch 50 can be freely changed.

On the other hand, since the case 60 and the chute 1 penetrate the sensing rod 10, a hole is inevitably formed, and the raw material scattered in the chute 1 through the hole penetrates into the chute 1, A blocking film 70 is applicable.

The foreign substance shielding film 70 may have any structure that closes the through hole 2, but it is constructed such that both sides thereof are opened, and the sensing rod 10 is inserted into the foreign substance shielding film 70, one side is fixed to the case 60, A bellows shape made of rubber or the like is preferable.

The foreign matter shielding film 70 has a shape in which an end portion is mounted on the outside of the case 60 and protrudes from the case 60. The foreign matter shielding film 70 is inserted into the inside of the chute 1 from outside, And the inner circumferential surface is brought into close contact with the detection rod 10, thereby completely blocking the penetration of the raw material from all portions.

The operation of the plug switch of the feed hopper for coal containing coal according to the present invention will be described with reference to FIG.

As shown in FIG. 5, the imaginary line sensing rods 10 are in an initial state, i.e., free from adhering light or distortion.

The raw material falls down from the upper portion of the chute 1, and the sensing rod 10 is in a falling path of the raw material but is smoothly dropped and supplied because of its structure and size so as not to prevent the raw material from falling.

If the sticking light or the like is generated in the chute 1 during the supply of the raw material and the sticking rod 10 is raised to the bottom of the sensing rod 10, the sensing rod 10 is moved upward by the rotation, As shown in FIG.

When the sensing guide plate 70 is applied, the raw material is smoothly dropped by the inclination of the induction sensing plate 70 and the attached light or the flattened piece enters the bottom of the sensing guide plate 70, The detection rod 10 is moved upward more quickly than when it is applied and the attachment light or the deviation is detected without any malfunction.

Since the knob 40 has a cam structure, the distance between the knob 40 and the switch 50 gradually approaches to the degree of rotation. In this process, the contact of the switch 50 is changed by the knob 40 to generate an attached light or a knot signal.

When an attachment light or a polarized light signal is generated by the switch 50, the alarm means (installed in the vicinity of the chute 1 or in the control room) is operated and the manager moves to the field through the alarm to solve the attachment light or the deviation.

When the attachment light or the deviation is solved, the sensing rod 10 is moved downward to the initial position by the elastic force of the coil spring 30, thereby preparing normal sensing light or polarization.

1: suit, 2: passage
10: Detection rod, 20: Stopper
30: coil spring, 40: knob
50: switch, 60: case
70: sensing guide plate, 80: foreign matter blocking film

Claims (3)

(2) formed in a box-shaped chute (1) installed in a conveying path of all raw materials including coal, and the raw material is inserted into the chute (10);
An elastic member mounted outside the chute and elastically supporting the sensing rod in an initial state;
A stopper 20 mounted on the outside of the chute and allowing the detection rod to move only to the upper portion by the light or the knitting of the detection rod while preventing the detection rod from moving downward;
A cam-shaped knob 40 mounted on an end of the sensing rod outside the chute;
A switch 50 spaced apart from the knob by a predetermined distance and changing a contact point of the knob according to an upward movement of the sensing rod to provide a signal of an attachment light or a variation;
An alarm means for outputting an alarm in the case of an attached light or a piece of signal by the switch;
And a case (60) detachably mounted to the outside of the chute and having a stopper, an elastic member, a knob and a switch mounted therein. [3] The apparatus of claim 1, wherein the sensing rod is formed in a curved cross-section so as not to interfere with the drop of the raw material, and is inclined downwardly to the periphery, And at least one sensing guide plate (70) for guiding upward movement of the sensing rod by adhering light or knitting. The method according to claim 1 or 2, further comprising a bellows type foreign matter blocking layer (80) having both open sides and closing the through holes of the chute, Plug switch of the chute.

Images