KR101330306B1 - Apparatus for automatically filling sand in electric furnace - Google Patents

Abstract

In addition to automatically supplying and controlling the amount of sand in accordance with the number of use of the outlet or the opener, an automatic electric furnace entrance sand filling device capable of securing a working space during safety accidents and electric road tilting operations is introduced.
To this end, the present invention, the sand storage hopper 10; A load cell 20 coupled to the bottom of the sand storage hopper; A chute unit 30 receiving sand from the sand storage hopper 10 and supplying the sand to the tap hole H of the electric furnace E; And a control unit 40 for controlling the amount of sand supplied from the sand storage hopper 10 to the chute unit 30 according to the number of times of use of the opener HO selectively blocking the electric outlet tap E. Including, but the chute 30 is in communication with the sand storage hopper 10 and one side of the supply pipe 32 is coupled to the automatic valve (V) and fixed to the outside of the electric furnace (E) The chute 34, an injection chute 36 which receives sand from the stationary chute 34 and supplies sand to the tap hole H, and is installed between the supply pipe 32 and the stationary chute 34. And a transfer chute 38 for transferring sand from the supply pipe 32 to the fixed chute 34 while being telescoped, and the transfer chute 38 receives sand from the supply pipe 32. A separation chute 38a, a moving chute 38b coupled telescopically to the separation chute 38a, and the separation chute 38 a) and first and second fixed brackets SB and MB coupled to the outer circumferential surface of the moving chute 38b, respectively, and hydraulic cylinders 39 having both ends coupled to the first and second fixed brackets SB and MB, respectively. Characterized in that it comprises a.

Description

Furnace exit sand automatic filling device {APPARATUS FOR AUTOMATICALLY FILLING SAND IN ELECTRIC FURNACE}

The present invention relates to an electric furnace tap-sand automatic filling apparatus, and more particularly, to an electric furnace tap-sand automatic filling apparatus capable of automatically measuring and inserting the amount of sand to be supplied according to the number of taps and openers. It is about.

The electric furnace is an apparatus used to dissolve scrap using arc and oxygen heat of oxidation, and to pull molten molten steel into a steel ladle to obtain hot molten steel.

After the scrap melting work charged into the electric furnace is completed, the refining work of the molten steel proceeds, and after completion of the refining work, the molten steel is pulled out through the tap provided in the lower part of the main body of the electric furnace. These openers serve to open the tap at the tap.

In general, before manufacturing and tapping molten steel in the electric furnace, sand is injected into the tapping hole provided at the lower end of the electric furnace to prevent the leakage of the sealed and molten metal. After attending, go to school.

On the other hand, with reference to Fig. 1, a method of injecting sand into a conventional electric power outlet.

As shown in Figure 1, the tap opening (1) is worn according to the number of times of use according to the opening and closing operation of the opener (9), the sand input amount should be gradually increased.

In general, the sand input operation is made by hand, and if the sand is excessively input due to the visual difference for each worker, the cost increases, as well as the problem of poor hole opening when opening the exit hole (1). there was.

In order to solve the problem of blockage of the tap hole (1) generated when the sand is overloaded, an electric tap opening device may be used.

Korean Patent No. 10-1008179 discloses an electric furnace opening device.

This is to prevent the tap hole from being blocked by the solidified sand during molten steel tapping, and to automatically detect whether the tap hole is blocked and melt the solidified sand using an induction heating coil to automatically open the tap hole. will be.

However, this 'electric furnace exit opening device' is only a follow-up action of the occurrence of the blockage of the exit, which takes time and cost, so that the worker can reduce the amount of sand to be blocked before the exit. It is of utmost importance that the input is made with proper control.

In order to prevent sand injection, the electric furnace operator directly climbs to the top of the tapping part 3 during sand injection operation, and operates the sand injection valve 7 at the bottom of the sand storage hopper 5 to visually check the degree of sand injection. Since the sand must be injected into the tap hole 1, there is always a problem that an accident may occur due to the high temperature of the electric furnace.

In addition, it is difficult to secure a work space due to interference by the sand storage hopper 5 installed at one side of the electric furnace during the tilting of the electric furnace, and there is a problem that the facility is burned out by high heat.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as adhering to the prior art already known to those skilled in the art.

Korean Patent Registration No. 10-1008179

The present invention can be supplied to automatically adjust the amount of sand in accordance with the number of use of the tap or opener to solve such a conventional problem, as well as the electric furnace tap sand which can secure the working space during safety accidents and electric road tilting work The purpose is to provide an automatic filling device.

Electric furnace tap sand automatic filling apparatus according to the present invention for achieving this object, the sand storage hopper; A load cell coupled to the bottom of the sand storage hopper; A chute unit receiving sand from the sand storage hopper and supplying sand to the tap of the electric furnace; And a control unit controlling an amount of sand supplied from the sand storage hopper to the chute unit according to the number of times of use of the opener for selectively blocking the electric outlet. The chute unit communicates with the sand storage hopper and one side thereof. It is provided between the supply pipe with an automatic valve, a fixed chute fixed to the outside of the electric furnace, an injection chute receiving the sand from the fixed chute to supply the sand to the tap hole, and is provided between the supply pipe and the fixed chute Telescoping includes a transfer chute for transferring sand from the supply pipe to the fixed chute, the transfer chute, the separation chute receiving the sand from the supply pipe, a moving chute coupled to the separation chute and the chute chute And first and second fixed brackets coupled to the separation chute and moving chute outer circumferential surfaces, respectively, and the first and second fixed bras. It characterized in that it comprises a hydraulic cylinder coupled to both ends of the jacket.

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The control unit checks the sand input amount according to the pre-stored opener use number when inputting the opener use number, and sends an operation signal to the automatic valve to open the supply pipe, and from the load cell for measuring the amount of sand contained in the sand storage hopper. In response to the information on the remaining amount of sand, when the supplied amount of sand reaches a reference value, it is characterized in that the supply pipe is cut off by transmitting an operation signal to the automatic valve.

The control unit secures a tilting work space by compressing the hydraulic cylinder immediately before the tilting operation of the electric furnace to return the moving chute to its original position.

According to the present invention, the following technical effects can be obtained.

First, by supplying the amount of sand quantified according to the number of use of the tapping hole or the opener, there is an advantage that can prevent the shortage of the sand supply or over-feeding.

Second, since the worker does not need to be input when the sand is added, there is an advantage that can prevent the safety accident of the worker.

Third, there is an advantage that can secure the work space during the electric tilting work.

Fourth, since the appropriate amount of sand is always supplied, there is an advantage that can reduce the time, effort, cost required for opening the exit.

1 is a method for injecting sand into the conventional electric exit tap
2 is a view showing the electric furnace tap sand automatic filling apparatus of the present invention,
3 is a view showing a hydraulic cylinder compression state that is an essential part of the present invention,
4 is a view showing a hydraulic cylinder inflated state which is an essential part of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an electric furnace tap sand automatic filling apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 2, the electric furnace tap sand automatic filling apparatus of the present invention includes a sand storage hopper 10, a load cell 20, a chute unit 30, and a controller 40.

The sand storage hopper 10 stores sand that is transported and supplied by a crane. It is preferable that the sand storage hopper 10 is formed such that its passage becomes narrower downwards, in order to prevent the sand introduced at once from being discharged from the sand storage hopper 10 suddenly.

The load cell 20 is mounted at the bottom of the sand storage hopper 10. The load cell 20 functions to measure the amount of sand supplied to the sand storage hopper 10 in real time and transmit the information to the controller 40 to be described later.

The chute unit 30 receives sand from the sand storage hopper 10 and supplies the sand to the tap hole H of the electric furnace E. A detailed configuration of the chute unit 30 will be described later.

The control unit 40 controls the amount of sand supplied from the sand storage hopper 10 to the chute unit 30 according to the number of use of the opener HO selectively blocking the tap hole H of the electric furnace E. do.

That is, since the control unit 40 has previously set and stored data on the amount of wear according to the number of times of use of the tapping hole H to the opener HO, and information on the amount of sand to be input in consideration of such amount of wear, The amount of sand to be supplied is determined by receiving the number of times of use of the tapping hole H to the opener HO or by counting the number of times.

For example, the EBT (Eccentric Bottom Tap) including the tap hole H to the opener HO is protruded on one side of the furnace body, and the amount of wear of the tap hole H depends on the number of times of use of the EBT. As it increases, the input sand amount according to the number of EBT usage may be set as follows.

Usage count

input
Usage count
input 1 to 10 times 100KG 51 to 60 times 125KG 11 to 20 times 105KG 61 to 70 times 130KG 21-30 times 110KG 71 to 80 times 135KG 31-40 times 115KG 81 to 90 times 140KG 41-50 times 120KG 91 to 100 times 145KG

Based on this set value, when sand is injected into the sand storage hopper 10, the amount of sand injected from the load cell 20 is measured, and the information is transmitted to the controller 40, and the controller 40 determines the number of times of use of the EBT. Accordingly to adjust the amount of sand supplied from the sand storage hopper 10

.

On the other hand, it is preferable that the chute 30 includes a supply pipe 32, a fixed chute 34, a pipe chute, a transfer chute 38.

One side of the supply pipe 32 is provided with an automatic valve (V). The automatic valve V receives the operation signal from the control unit 40 and selectively opens and closes the supply pipe 32.

The feed pipe 32 is in communication with the sand storage hopper 10.

A fixed chute 34 is fixedly installed at one side of the electric furnace E, and an injection chute 36 is installed continuously with the fixed chute 34.

In addition, a delivery chute 38 is installed between the supply pipe 32 and the stationary chute 34, and the delivery chute 38 is formed telescopically, from the supply piping 32 to the stationary chute 34. When the sand is supplied, the length thereof increases, and when the sand supply work is completed, the length thereof decreases. Thus, the work space can be used more efficiently during the electric furnace E tilting work.

The transfer chute 38 preferably includes a separating chute 38a, a moving chute 38b, and a hydraulic cylinder 39 so that the transfer chute 38 can be telescoped.

The separation chute 38a receives sand from the supply pipe 32, and is detachably inserted into the moving chute 38b. On the contrary, one end of the moving chute 38b is detachably inserted into the separation chute 38a. It may be. The first fixing bracket SB is coupled to the outer circumferential surface of the separation chute 38a, and the second fixing bracket MB is fixedly coupled to the outer circumferential surface of the moving chute 38b.

Both ends of the hydraulic cylinder 39 are fixed to the first and second fixing brackets SB and MB, respectively, so that the separating chute 38a and the moving chute 38b maintain their coupling state when the hydraulic cylinder 39 is inflated. The entire length is elongated, and the total length of the separation chute 38a and the moving chute 38b is attenuated while the hydraulic cylinder 39 is compressed while maintaining the coupling state.

As described above, the control unit 40 checks the sand input amount according to the number of openers HO previously stored when the number of openers HO is input, and transmits an operation signal to the automatic valve V, and supplies a supply pipe 32. Is opened, receives the information on the remaining amount of sand from the load cell 20 to measure the amount of sand contained in the sand storage hopper 10, when the supplied sand amount reaches the reference value, the operation signal is sent to the automatic valve (V) Shut off the pipe (32).

In addition, the control unit 40 can secure the tilting working space by compressing the hydraulic cylinder 39 immediately before the tilting operation of the electric furnace E to return the moving chute 38b to its original position.

3 and 4, the operation process of the electric furnace tap sand automatic filling apparatus of the present invention will be described.

 As shown in FIG. 3, when sand is injected into the sand storage hopper 10, the load cell 20 measures the amount of sand and transmits the information to the controller 40.

The controller 40 determines the amount of sand to be injected, based on the number of times of manually or automatically counting EBT, and transmits an open signal to the automatic valve V to open the supply pipe 32.

At the same time, when the control unit 40 transmits an operation signal to the hydraulic cylinder 39, the moving chute 38b is telescoped from the separation chute 38a while the entire length of the transfer chute 38 is extended. One end of 38b moves to a position corresponding to the upper end of the fixing chute (see FIG. 2).

As shown in FIG. 4, when the sand supply is completed and the tilting operation of the electric furnace E is in progress, the control unit 40 transmits an operation signal to the hydraulic cylinder 39 and compresses the moving signal. 38b) moves in the direction of the separation chute 38a while telescoping, thereby reducing the overall length of the transfer chute 38. Therefore, the electric furnace E tilting work etc. can be advanced in the state which fully secured the working space.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10: sand storage hopper 20: load cell
30: chute part 32: supply piping
34: fixed chute 36: feed chute
38: delivery chute 38a: separation chute
38b: moving chute 39: hydraulic cylinder
40:
E: electric furnace H; Exit
HO: Opener V: Automatic Valve
SB: 1st fixing bracket MB: 2nd fixing bracket

Claims (5)

Sand storage hopper 10;
A load cell 20 coupled to the bottom of the sand storage hopper;
A chute unit 30 receiving sand from the sand storage hopper 10 and supplying the sand to the tap hole H of the electric furnace E; And
And a controller 40 for controlling the amount of sand supplied from the sand storage hopper 10 to the chute unit 30 according to the number of times of use of the opener HO selectively blocking the electric outlet tap E. But
The chute unit 30 is in communication with the sand storage hopper 10, the supply pipe 32 is coupled to the automatic valve (V) on one side and the fixed chute (34) fixed to the outside of the electric furnace (E) ), An input chute 36 for receiving sand from the fixed chute 34 and supplying sand to the tap hole H, and is installed between the supply pipe 32 and the fixed chute 34 to telescoping. And a transfer chute 38 for transferring sand from the supply pipe 32 to the fixed chute 34.
The transfer chute 38 includes a separation chute 38a that receives sand from the supply pipe 32, a moving chute 38b that is telescopically coupled to the separation chute 38a, and the separation chute ( 38a) and the first and second fixed brackets SB and MB respectively coupled to the outer circumferential surface of the moving chute 38b and the hydraulic cylinders 39 having both ends coupled to the first and second fixed brackets SB and MB respectively. Characterized in that it comprises, electric furnace sandblast automatic filling device.
delete delete The method according to claim 1,
The controller 40 checks the sand input amount according to the number of openers HO stored in advance when the opener HO is used, and transmits an operation signal to the automatic valve V to open the supply pipe 32. And receiving the information on the remaining amount of sand from the load cell 20 which measures the amount of sand contained in the sand storage hopper 10 and transmitting an operation signal to the automatic valve V when the supplied sand amount reaches a reference value. Furnace outlet sand automatic filling device, characterized in that the supply pipe 32 is blocked.
The method of claim 4,
The control unit 40 is configured to compress the hydraulic cylinder 39 immediately before the electric furnace E tilting operation to secure the tilting work space by repositioning the moving chute 38b. Sandblasting automatic filling device.

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