KR200272218Y1 - Valve structure for sealing at the top of blast furnace - Google Patents

Abstract

The present invention is to prevent the damage caused by excessive shrinkage while maintaining the airtightness of the packing member by adjusting the degree of shrinkage of the packing member by the impact blocking body, and to maintain the metal sheet at an appropriate temperature by the high temperature steam to adhere to the dust The present invention relates to a valve structure for closing the blast furnace to prevent dust from adhering to the metal sheet by removing moisture from the blast furnace.

Ore through hole (12a) (110a) is formed to have a support body 12 and the metal sheet 110 is installed on the lower end of the lower hopper (5), and rotates in close contact with the lower end of the metal sheet (110) In the valve structure that is made of a disk 16 having a packing member 17 in close contact with the bottom hopper, the packing member in a state in which the metal seat 110 and the disk 16 are in close contact with each other. An impact blocking body 126 for preventing the disk 16 from moving to a higher position than the elastic limit of 17 is fixed to the metal sheet 110.

Description

Valve structure for sealing at the top of blast furnace

The present invention is provided between the upper hopper to maintain the atmospheric pressure directly to the ore and the blast furnace to maintain a significant high pressure is provided on the lower side of the lower hopper to allow the ore to enter the blast furnace to seal the blast furnace The valve structure to be performed, and more specifically, by adjusting the degree of shrinkage of the packing member by the impact blocking body to prevent damage due to excessive shrinkage while maintaining the airtightness of the packing member, the metal sheet is suitable by high temperature steam It relates to a closed valve structure at the top of the blast furnace to maintain the temperature to remove the moisture of the dust adhered thereto so that the dust is not attached to the metal sheet.

In general, the blast furnace 11 receives the ore through the upper hopper 2 and the lower hopper 5 is maintained at a high pressure inside the upper hopper 2 is connected to the outer conveyor belt (1) In the atmospheric pressure state, the lower hopper 5 which connects the upper hopper 2 and the blast furnace 11 is made to change a pressure as needed. That is, when the ore charged into the upper hopper 2 through the conveyor belt 1 is supplied to the lower hopper 5, the upper hopper for sealing between the upper hopper 2 and the lower hopper 5 While the valve 4 is opened, the lower hopper sealing valve 10 mounted between the lower hopper 5 and the blast furnace 11 is cut off so that the lower hopper 5 is at atmospheric pressure, on the contrary, the lower hopper When the ore of (5) is charged into the blast furnace 11, the upper hopper sealing valve 4 is closed while the lower hopper sealing valve 10 is opened so that the lower hopper 5 is inside the blast furnace 11 Will be at the same pressure as

To this end, before the ore is charged from the upper hopper (2) to the lower hopper (5) by opening the gas recovery valve (7) connected to the lower hopper 5 to back pressure the lower hopper (5) to achieve the atmospheric pressure state Before the ore is charged from the lower hopper 5 into the blast furnace 11, the primary equalization valve 6 is opened and equalized with semi-clean gas, and the secondary equalization valve 8 is opened, and the lower hopper (with nitrogen) is opened. 5) The pressure inside the blast furnace 11 should be the same.

Reference numeral 9 is a raw material control gate is installed on the lower side of the lower hopper 5 for adjusting the charging speed of the ore charged from the lower hopper (5) to the blast furnace (11).

In such a system, in order to smoothly supply ore in the blast furnace 11, the pressure control of the lower hopper 5 should be made stable, and in particular, the lower hopper installed between the lower hopper 5 and the blast furnace 11 to block pressure. The airtight state of the blast furnace 11 by the sealing valve 10 is the most important factor, which is because when the airtight state of the lower hopper sealing valve 10 is unstable because the blast furnace 11 is maintained at a high pressure. This is because the gas in the blast furnace 11 leaks to the lower hopper 5 side and the pressure of the lower hopper 5 becomes unstable.

As shown in FIG. 2, the structure of the conventional lower hopper sealing valve 10 is mounted and fixed to a lower hopper 5 by a bolt member (not shown), and the ore may pass through the center portion thereof. The support sheet 12 and the metal sheet 13 having the holes 12a and 13a formed thereon, and the metal sheet 13 is mounted on the lower portion of the metal sheet 13 while rotating about the hinge portion 15. It is made of a disk 16 that can be in close contact with, the upper surface of the support body 12 is mounted with a sealing member 14, the upper surface of the disk 16 is a rubber on the contact surface with the metal sheet 13 A packing member 17 made of material is provided. That is, in order to block the lower end of the lower hopper 5, the disk 16 is rotated counterclockwise in the drawing about the hinge 15, so that the packing member 17 on the lower surface of the metal sheet 13 In close contact with the disk 16, the disk 16 rotates in the opposite direction to open the lower end of the lower hopper 5.

By the way, in the conventional lower hopper sealing valve 10, the dust is fixed to the lower surface of the metal seat 13 by moisture and steam, the opening and closing shock of the gasket 16 is only the packing member 17 As the packing member 17 is easily damaged due to the direct damage to the packing member 17, the productivity is lowered due to frequent stopping of maintenance for repair due to poor airtightness, and also equipment accidents due to leakage of pressure in the blast furnace 11. As it occurs frequently, stable operation was difficult.

The present invention is to solve the conventional problems, the lower hopper is installed between the upper hopper to maintain the atmospheric pressure directly receiving the ore, and the blast furnace to maintain a significant high pressure to ensure that the ore is charged into the blast furnace smoothly. The valve structure, which is provided on the lower side, serves to seal the blast furnace, and prevents damage to the packing member due to the sealing impact, and also enables stable blast furnace operation and improves productivity by sealing the upper part of the blast furnace. It is an object of the present invention to provide a valve structure.

1 is a schematic view showing the installation state of the upper hopper and the lower hopper for supplying ore to a typical blast furnace

Figure 2 is a block diagram showing a closed valve structure of the blast furnace according to the prior art

3 is a block diagram showing a closed valve structure of the blast furnace according to the present invention

Figure 4 is a configuration diagram showing in detail the shock shield which is the main part of the present invention.

Explanation of symbols on the main parts of the drawings

2 ... upper hopper 5 ... lower hopper

11 ... blast furnace 16 ... disc

17 ... packing member 100 ... lower hopper sealing valve

110 ... metal seat 112 ... steam passage

120 ... shock shield 122 ... fixed body

124 ... bolt member 126 ... impact blocking body

128 ... spacing plate 130 ... steam supply line

140 ... thermocouple

As a technical configuration for achieving the above object, the present invention has a support body and a metal sheet installed in the lower hopper to form a hole for ore passage, and rotates in close contact with the lower end of the metal sheet and the close contact portion In the valve structure to block the blast furnace from the lower hopper by being made of a disk having a packing member, for preventing the disk from moving to a higher position than the elastic limit of the packing member in the state that the metal seat and the disk is in close contact with each other By providing an airtight valve structure of the blast furnace, characterized in that the shock-blocking body is fixed to the metal seat.

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

3 is a schematic view showing a closed valve structure of the blast furnace according to the present invention, the lower hopper sealing valve 100 of the present invention according to this structure is a bolt member (not shown) on the lower hopper (5) side And a support body 12 and a metal sheet 110 mounted and fixed to the metal sheet 110 while being mounted on the lower portion of the metal sheet 110 and rotating about the hinge portion 15. The approximate configuration of the disk 16 that can be in close contact is similar to that of the prior art.

Of course, holes 12a and 110a through which ore can pass through the central portion of the support body 12 and the center of the metal sheet 110 are formed, and the sealing member 14 is formed on the upper surface of the support body 12. ) Is mounted on the upper surface of the disk 16 is provided with a packing member 17 made of rubber material on the contact surface with the metal sheet 110. That is, in order to block the lower end of the lower hopper 5, the disk 16 is rotated counterclockwise in the drawing about the hinge 15, the packing member 17 on the lower surface of the metal sheet 110 In close contact with the disk 16, the disk 16 rotates in the opposite direction to open the lower end of the lower hopper 5.

The present invention is provided with a shock shield 120 in the hole 12a (110a) side of the support body 12 and the metal sheet 13, the shock shield 120 is shown in more detail, which It is preferable that a plurality of holes 12a and 110a are provided at the same intervals, and the fixing body 122 fixed to the holes 12a and 110a by one body (fixed by welding or the like, fixed by bolt members, etc.). And one or more of an impact blocking body 126 mounted on the lower side of the fixed body 122 via the bolt member 124 and a boundary portion between the fixed body 122 and the impact blocking body 126. By inserting a plurality of the above is made of a gap adjusting plate 128 to adjust the height of the lower end of the impact blocking body 126. In addition, the fixing body 122, the gap adjusting plate 128, and the impact blocking body 126 each have a hole 129 through which the bolt member 124 is fastened in the up and down direction, thereby forming a bolt through the hole 129. When the member 124 is fitted, the gap adjusting plate 128 and the impact blocking body 126 may be firmly fixed to the fixed body 122.

Here, it is very important that the height of the lower end of the impact blocking body 126 is set slightly higher than the height of the lower end of the metal sheet 110, which means that the disk 16 is counterclockwise around the hinge 15. When the packing member 17 is in close contact with the lower end of the metal sheet 110 by rotating the packing member 17, the packing member 17 is contracted by the adhesive force, and the degree of contraction is limited by the position of the lower end of the impact blocking body 126. . That is, the upper surface of the disk 16 to the upper position by the contraction of the packing member 17 to the upper position is blocked by the collision with the lower end of the impact blocking body 126, thus the impact blocking body 126 If the packing member 17 is set so as not to shrink until the packing member 17 contracts to an appropriate degree and maintains airtightness and exceeds the elastic limit, the packing member 17 is maintained by the impact force while maintaining the airtightness of the blast furnace 11. It is possible to effectively prevent breakage.

Of course, the height at which the lower end of the impact blocking body 126 is located can be adjusted very simply and quickly by adding or subtracting the gap adjusting plate 128.

In addition, the present invention is a high-temperature steam is supplied to the metal sheet 110 through the steam supply pipe 130 to remove the dust attached to or fixed to the bottom surface of the metal sheet 110, the steam supply pipe 130 The high temperature steam supplied through) heats the metal sheet 110 by heat transfer while circulating the steam passage 112 formed along a predetermined path in the center of the metal sheet 110, and thus, the high temperature steam supply. When the temperature of the metal sheet 110 is increased, the moisture of the dust to be fixed by containing moisture is usually evaporated, which effectively blocks the adhesion of the dust.

Of course, in order to control the temperature of the metal sheet 110, a plurality of thermocouples 140 for sensing the temperature of the metal sheet 110 are installed in the circumferential direction of the blast furnace to measure the temperature of the metal sheet 110 and The thermocouple 140 is connected to the controller to transmit temperature information of the metal sheet 110 so that the controller opens and closes the flow of steam so that the metal sheet 110 can be maintained within a set temperature range.

According to the sealing valve structure of the upper part of the blast furnace according to the present invention as described above, in the lower hopper sealing valve mounted on the upper part of the blast furnace, when the packing member of the lower hopper side metal seat and the blast furnace side disk is in close contact with each other, the packing member shrinks By adjusting the degree by the impact-blocking body, the packing member is kept airtight and is prevented from being damaged by excessive shrinkage.The metal sheet is kept at a proper temperature by high temperature steam to remove dust from the dust attached to it. It is not attached to the metal sheet, and thus stable operation of the blast furnace is possible, which has the effect of improving productivity.

Claims (5)

Ore through hole (12a) (110a) is formed to have a support body 12 and the metal sheet 110 is installed on the lower end of the lower hopper (5), and rotates in close contact with the lower end of the metal sheet (110) In the valve structure which is made of the disk 16 with the packing member 17 in its close part, and blocks the blast furnace from the lower hopper, In the state where the metal sheet 110 and the disk 16 are in close contact with each other, the impact blocking body 126 for preventing the disk 16 from moving to a higher position than the elastic limit of the packing member 17 is a metal sheet. The closed valve structure of the blast furnace, characterized in that fixed to (110). According to claim 1, The impact blocking body 126 is shock-blocking body by mounting the bolt member 124 so that the gap adjusting plate 128 is fitted to the fixed body 122 is fixed to the metal sheet 110 A closed valve structure at the top of the blast furnace, characterized in that the height of the lower end of the (126) can be adjusted. The method of claim 1, wherein the impact blocking body 126 is a valve structure for closing the blast furnace, characterized in that it is provided with a plurality of spaced apart a predetermined interval in the circumferential direction of the metal sheet (110). According to claim 1, wherein the metal sheet 110 is provided with a steam passage 112, the steam passage 112 is supplied with a high temperature steam through the steam supply pipe 130 to heat the metal sheet 110 A closed valve structure at the top of the blast furnace, characterized in that. The upper part of the blast furnace according to claim 4, wherein the metal sheet (110) is provided with a thermocouple (140) to open and close the supply of steam through the steam supply pipe (130) by the temperature measured by the thermocouple (140). Sealing valve structure.