KR19980028910U - Load sensing device of feed screw - Google Patents

Abstract

The present invention is designed to improve the circulation work efficiency of the dust collecting dust by preventing the damage of the equipment by preventing the phenomenon of excessive filling of the inside of the casing by detecting the initial occurrence of overload in the drive motor driving the feed screw. It relates to a load sensing device of the transfer screw, the inner space of the one end side of the housing 30, can be slid while blocking the housing 30 in the longitudinal direction, the pressure sensing so as to receive the elastic force to the center side by the elastic member 78 Install the member 54; A load cell 74 is installed on the movement path of the support rod connected to the pressure sensing member 54 so as to be integral with the pressure sensing member 54; The load cell 74 is electrically connected to a control unit capable of controlling a motor for supplying dust collecting dust to a housing side and a driving motor for driving a feed screw, so that the pressure sensing member 54 is moved by the pressure in the housing. When the support rod is in contact with the load cell 74 is characterized in that it stops its operation before the overload occurs in the drive motor.

Description

Load sensing device of feed screw

The present invention collects dust contained in transporting materials such as iron ore, limestone, coal, etc. using bag-filter dust collector, adds agitated water to make cakes, and again, in transporting materials on belt conveyor The present invention relates to a circulation system of dust collecting dust that is loaded and recycled as a raw material, and more specifically, an equipment that prevents excessive dust filling in the casing by early detecting that an overload occurs in a drive motor for driving a transfer screw. The present invention relates to a load sensing device of a transfer screw, which is designed to prevent breakage of the dust and improve dust circulation dust.

In the conventional conveying screw device, if an accident occurs that prevents the lower belt conveyor from detecting the driving motor of the conveying screw, a caking dust is supplied through the conveying screw on the belt of the stopped belt conveyor. (Caking Dust) is continuously loaded, and after a certain period of time, the caking dust flows to the lower side of the belt as well as the overfilling of the caking dust is gradually progressed from the bottom of the outlet of the conveying screw to the inlet. Overloading occurs in the drive motor by inducing a force that makes the transfer screw difficult to rotate, and dust that has increased adhesiveness is attached to the inner wall of the outlet port by adding excessive stirring water during the caking process of the dust. Further inside the casing to accommodate the transfer screw by closing When the filling rate becomes excessive, the drive motor of the transfer screw is overloaded.

When the outside air temperature falls to the freezing point of the dust, usually -3 ° C. or lower, in winter, freezing occurs due to the stirring water contained in the casing dust, which causes frictional resistance with the inner wall of the casing. As described above, the driving motor of the feed screw was overloaded.

The present invention has been devised to solve the above-mentioned conventional problems, and its object is to overload due to overfilling of dust in a drive motor for driving and rotating a conveying screw for conveying moisture-containing dust to a belt conveyor. It is to provide a load sensing device of the transfer screw to improve the work efficiency of the circulation process of the dust collecting dust by preventing the damage of the equipment by stopping the drive motor by detecting it before it occurs.

1 is a schematic view showing a dust collecting dust circulation facility equipped with a load sensing device of a transfer screw according to the present invention

Figure 2 is a schematic diagram showing the configuration of a typical transfer screw

3 is a schematic configuration diagram showing a state in which a load sensing device according to the present invention is mounted on a transfer screw.

* Description of the symbols for the main parts of the drawings *

10 ... Hopper 14 ... Rotary Valve

16, 26, 50 ... motor 20 ... first housing

30 ... 2nd housing 34 ... 2nd transfer screw

40 ... High temperature steam piping 54 ... Pressure sensing member

56 ... support bar 70 ... contact member

74 ... load cell 78 ... elastic member

90 ... control unit

As a technical configuration for achieving the above object, the present invention, a housing for transporting the dust collection dust introduced by receiving a hopper for accommodating the dust collecting dust, and a feed screw connected to the drive motor to be rotatable An apparatus for resupplying dust collection dust to a belt conveyor by having a pressure sensor, wherein the pressure sensing means is provided in the inner space at one end side of the housing so as to be able to slide while blocking the housing in a longitudinal direction, and to receive elastic force toward the center side by an elastic member. Install the member; A load cell is installed on a movement path of the support rod connected to the pressure sensing member so as to be integral with the pressure sensing member; The load cell is electrically connected to a control unit capable of controlling a motor for supplying dust collecting dust to a housing side and a driving motor for driving a feed screw, so that the pressure sensing member is moved by pressure in the housing, and the support rod connected thereto contacts the load cell. If so, by providing a load sensing device of the transfer screw, characterized in that it stops its operation before the overload occurs in the drive motor.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic view showing a dust collecting circulation system equipped with a load sensing device of a transfer screw according to the present invention, Figure 2 is a schematic diagram showing the configuration of a general transfer screw, Figure 3 is a load according to the present invention A schematic configuration diagram showing a state in which a sensing device is mounted on a transfer screw, and having a hopper 23 for receiving and temporarily storing dust collection dust extracted from a facility, and inside a dust outlet 31 of the lower side of the hopper 23. The rotary valve 24 is installed, the rotary valve 24 is connected to the motor 25 via a chain 42 to discharge the dust to the lower side by rotation.

One side of the first housing 20 which is formed in a substantially hollow cylindrical shape and positioned horizontally in the discharge port 12 is connected to each other, and the first conveying screw in the longitudinal direction of the inside of the first housing 20. (Not shown) and rotatably mounted, one end of the first conveying screw extends outward of the first housing 20 to be supported by the bearing block 22 and is driven by the reducer 24. Is connected to the motor 26, when the drive motor 26 is rotated to transfer the dust collecting dust supplied from the hopper 10 in the longitudinal direction by the first feed screw which is decelerated and rotated at an appropriate speed.

The agitation water supply pipe 28 is connected to the first housing 20 to add some moisture to the dust collecting dust, and thus, a dust collecting dust having an appropriate moisture content is formed at one lower side of the first housing 20 ( 29 is discharged to the upper side of the second housing (30).

As shown in more detail in FIG. 2, the second housing 30 having an approximately hollow cylinder shape having one side connected to the outlet 29 is inlet connected to the outlet 29 of the first housing 20. (32) is formed above the one end, and the second conveying screw 34 is installed in the longitudinal direction of the second housing 30, the second conveying screw 34 is a hollow cylinder screw Body 36 and threads 38 formed longitudinally on the outer surface of the body 36, each end of the screw body 36 being outward of each end of the second housing 30. The hot steam pipe 40 is inserted into the hollow through the extended end, and the screw body 36 is rotatably installed with respect to the hot steam pipe 40. Each end of 36 is rotated by a bearing block 42 Supported as possible.

The sprocket 44 is formed at one end of the screw body 36 and is connected to the sprocket 48 of the drive motor 50 having the reduction gear 52 via the chain 46 to connect the drive motor 50. In operation, the sprocket 48 rotates at an appropriate speed, and thus the rotational force is connected to the screw body 36 via the chain 46 and the sprocket 44 so that the second transfer screw 34 is connected to the second housing. It is to rotate within 30.

As shown in FIG. 3, the pressure sensing member 54 having the same inner diameter and size as that of the second housing 300 is mounted inside the second housing 30 of the other end of the screw body 36. The pressure sensing member 54 is slidably fitted to the outside of the screw body 36 at a position close to the outlet 31 side of the second housing 30, and a plurality of supporting rods 56 are provided on the rear side thereof. As the 56a) is screwed, the other ends of the supporting rods 56 and 56a extend a predetermined length to the outside of the second housing 30.

On the other hand, a support bracket 60 is installed at the outer end of the second housing 30 on the pressure sensing member 54 side, and a support plate 62 having an appropriate inner space is installed thereon, and the support plate 62 is disposed. ), A through hole 64 is formed in the vertical wall side of the supporting rods 56 and 56a to allow the end portions of the supporting rods 56 and 56a to slide therethrough. The contact member 70 is fitted by the binding bolt member 72, and the contact member 70 and the binding bolt member 72 are located outside the support plate 62.

The contact member 70 has a shape in which a central portion thereof protrudes outward, and an end portion of the central side supporting rod 56a is bound to the protruding portion, and is fastened by screwing to a thread 57a of the supporting rod 56a. The binding bolt member 72a is positioned inward of the contact member 70 to fix the contact member 70 to the ends of the support rods 56 and 56a by the linking action with the binding bolt member 72. In the support rod 56a, an extension protrusion 58 is formed to extend further than the thread 57a, and the extension protrusion 58 extends outward through the contact member 70 to be mounted on the support bracket 60. It is possible to apply a force to the load cell (74).

On the other hand, at the inner central portion of the support plate 62 of the support rods 56 and 56a, protruding pieces 76 are formed on the outer surface, respectively, and the coil spring type elastic member 78 has the support rods 56 and 56a. ), One end of which is in contact with the protruding jaw 76 and the other end of which is in contact with the inner surface of the support plate 62, and the support rods 56, 56 'are supported by the elastic member 78. And a pressure sensing member 54 integrally connected thereto so as to be supported by a certain degree of force in the left direction of FIG. 3.

Of course, the belt 82 of the belt conveyor which is supported by the carrier roller 80 or the like is positioned at the lower side of the outlet 31 of the second housing 30.

In addition, each of the drive motors 16, 26, 50, and the load cell 74 are connected to the control unit 90 via wires and controlled by the control unit, and the control unit transmits a constant electrical signal. If necessary, all operations on the device of the present invention to be described later are automatically performed by a program input to the control unit 90, and by installing an alarm unit, the operator knows that an abnormality has occurred in the facility. Can be followed up by a separate follow-up.

It describes the operation of the load sensing device of the transfer screw according to the present invention having the above configuration.

First, in the normal operation of the dust collecting system for recycling dust collecting dust, the rotary valve 14 on the lower side of the hopper 10 is rotated by the motor 16, and an appropriate amount of dust collecting dust is transferred to the first housing 20. The first conveying screw of the first housing 20 is rotated by the drive motor 26 to convey dust collecting dust introduced into the outlet 29 to the outlet 29 and at the same time, the first conveying screw is stirred in the first housing 20. As the agitated water is supplied through the water supply pipe 28, the dust collecting dust is supplied to the inlet 32 of the second housing 30 through the outlet 29 in a state where an appropriate amount of water is contained.

Then, the second transfer screw 34 in the second housing 30 is discharged to the upper portion of the belt 82 of the belt conveyor through the discharge port 31, the dust collecting dust introduced into the interior while rotating by the drive motor 50. do.

At this time, all the above operations are performed normally, and the dust collecting dust is smoothly transferred by the transfer screw, so that the driving motor for driving the transfer screw does not occur.

However, when the air temperature falls below the freezing point in winter, the dust freezes and interferes with the rotational movement of the transfer screw, causing overloading of the drive motor. The steam is supplied, and the high temperature steam circulates inside the second housing 30 to increase the temperature therein by heat conduction, thereby preventing dust collection from freezing, thereby smoothly transporting the dust collection, thus driving The overload does not occur in the motor 50.

In addition, the outlet 31 of the second housing 30 is clogged due to excessive moisture contained in the dust collector, or an abnormality occurs in the belt conveyor, thereby preventing the belt 82 from moving normally. When dust collecting dust discharged continuously on the upper surface of the belt 82 accumulates and eventually rises toward the discharge opening 31 to block the discharge opening 31, the dust collecting dust is continuously rotated by the second transfer screw 34. The outlet 31 is supplied to the outlet 31, on the contrary, the outlet 31 is closed so that the dust collecting dust is not discharged to the outside. At this time, the dust collecting dust exceeds the filling capacity of the second housing 30, so that the pressure The sensing member 54 is pushed outward, and thus the pressure sensing member 54 moves outward while overcoming the elastic repulsive force of the elastic member 78 to load the contact member 70 connected thereto. The load cell 74 transmits such a signal to the controller.

The controller detects that the dust collecting dust is excessively filled in the second housing 30 by the signal from the load cell 74, and stops the driving motors 16, 26 and 50, respectively, if necessary, thereby collecting dust. Stops feeding.

Therefore, the worker takes the follow-up measures accordingly so that the normal dust collecting cycle is made.

After the above-described measures are completed, the dust collecting state in the second housing 30 becomes normal, and the pressure of the dust collecting dust applied to the pressure sensing member 54 is removed, so that the pressure sensing member 54 is in its original position. It is returned by the elastic repulsive force of the furnace elastic member 78, which is separated from the load cell 74 so that the control unit 90 restarts the drive motor to rotate the feed screw to discharge the dust collecting dust over the belt 92 normally. Will be.

As described above, according to the load sensing device of the transfer screw according to the present invention, even when the air temperature falls below the freezing point temperature in winter, the dust on the transfer screw side is heated by high temperature steam to prevent the dust from freezing together. Therefore, the circulation system of the dust collecting dust by the transfer screw is always made stable regardless of the ambient temperature.

In addition, before the dust collecting dust in the housing accommodating the transfer screw is excessively filled due to abnormal operation to overload the driving motor, the pressure in the housing is automatically sensed by the load cell, thereby stopping the operation of the driving motor. Measures can be taken to prevent damage to the installation.

That is, the driving motor of the dust collecting dust conveying screw for transporting the dust collecting dust is prevented from being damaged by an overload, and thus has a good practical effect that enables stable operation of the equipment.

Claims (2)

Apparatus for re-feeding dust collection dust to the belt conveyor by having a hopper for accommodating dust collecting dust and a housing for receiving a conveying screw rotatably connected to the driving motor to transport the dust collecting dust to an appropriate position. To A pressure sensing member (54) provided in the inner space at one end side of the housing (30) to be slidable while blocking the housing (30) in a longitudinal direction and to receive an elastic force toward the central portion by the elastic member (78); A load cell 74 is installed on the movement path of the support rod connected to the pressure sensing member 54 so as to be integral with the pressure sensing member 54; The load cell 74 is electrically connected to a control unit capable of controlling a motor for supplying dust collecting dust to the housing side and a driving motor for driving the transfer screw, thereby moving the pressure sensing member 54 by the pressure in the housing. When the support rod is in contact with the load cell 74, the load sensing device of the transfer screw, characterized in that it stops its operation before overloading the drive motor. The method of claim 1, The screw body 36 constituting the transfer screw 34 is formed in a hollow so as to be rotatably fitted to the high temperature steam supply pipe 40 penetrated in the longitudinal direction of the housing 30 of the transfer screw Load sensing device.