JP2010032064A - Seal device of heating furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal device of a heating furnace free from degradation of sealing performance caused by generation of scale, not needing labor hour for charging a seal material, and capable of keeping high operation efficiency. <P>SOLUTION: A carriage 3 loading a heated material W is put in/out into/from the heating furnace E in which a furnace wall is molded into the substantially portal type section, a hearth of the heating furnace E is formed by the carriage 3 in an ingressive state, and the seal device is disposed to seal between a side edge of the carriage 3 and an eaves wall 2 of the heating furnace E. The seal device is composed of a seal material storage tank 51 disposed on the carriage 3 and storing the seal material, and a seal plate 52 disposed on the eaves wall 2 while that its tip section is entered into the seal material in the seal material storage tank 51, and further the seal material storage tank 51 is disposed on a position to receive the scale 62 falling from the carriage 3 to use the received scale 62 as the seal material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sealing device for a heating furnace, and more particularly to a sealing device for a cart-type heating furnace used for heating large forged steel products and the like.

Conventionally, a water seal structure as shown in FIG. 4, for example, is employed in this type of trolley type heating furnace in order to prevent intrusion air from around the trolley. This is because seal plates 83 and 84 are provided on the side surface of the carriage 81 that has entered the furnace and on the furnace side wall 82 facing the side, respectively, and the tip portions of the seal plates 83 and 84 that are bent downward are provided with seal water. It is a structure immersed in the water filled in the storage tank 85. Here, the storage tank 85 is raised to the position shown in FIG. Further, in Patent Document 1, a seal sand storage tank that stores seal sand is provided on the side wall of the carriage, and the tip of the seal plate provided at the lower end of the side wall of the furnace is introduced into the seal sand to block off from the outside air. Is shown.
JP 4-270885

  However, in the conventional water seal device, the scale peeled off from the material to be heated placed on the carriage often falls and accumulates in the seal water storage tank 85. For this reason, there is a problem that the weight of the storage tank 85 becomes excessive and cannot be lifted and lowered by the air cylinder 86 and sealing is impossible. On the other hand, the sand seal device using seal sand as the sealing material shown in the above publication does not cause a problem as in the water seal device, but it is periodically replenished because the seal sand gradually decreases. Therefore, there is a problem that the replenishment work takes time and the operation efficiency is lowered due to the operation stop during this time.

  Accordingly, the present invention solves such a problem, and sealability of a heating furnace that does not require the trouble of replenishing the sealing material and maintains high operation efficiency without causing deterioration of the sealing performance due to the generation of scale. An object is to provide an apparatus.

  In order to achieve the above object, according to the first aspect of the present invention, the carriage (3) on which the material to be heated (W) is placed is moved in and out of the heating furnace (E) in which the furnace wall has a substantially gate-shaped cross section. A sealing device for forming a hearth of the heating furnace (E) by the cart (3) in the ingress state and sealing between the side edge of the cart (3) and the side wall (2) of the heating furnace (E). The sealing device is provided on one of the carriage (3) or the side wall (2) to store the sealing material, and the tip is provided on the other side of the carriage (3) or the side wall (2). And a sealing plate (52) that is made to enter the sealing material of the sealing material storage tank (51), and a scale (62) that drops the sealing material storage tank (51) from the top of the carriage (3). The scale (62) which is provided at a position where it can be accommodated is used as a sealant.

  In the first invention, the seal material stored in the seal material storage tank overflows and decreases from the inside of the seal material storage tank as the carriage moves into and out of the furnace, but the scales that are supplied one after another fall are the seal material. The seal plate accommodated in the storage tank is crushed into fine particles by a relatively moving seal plate and functions as a seal material, and the sealing performance of the heating furnace is maintained. According to the first aspect of the present invention, there is no problem that the sealing performance is impaired due to the occurrence of scale as in the conventional water seal structure, and the seal sand as the seal material is not used as in the conventional seal structure using the seal sand. Since there is no need for replenishment, it is possible to avoid a decrease in operational efficiency associated with the sealing material replenishment operation.

  In this 2nd invention, while providing the scraper (7) in the approach end position of a trolley | bogie (3), the scale (62) which drops the scraper (71) of a scraper (7) from a sealing material storage tank (51). While being positioned in a standing posture in the pit (P) to be accommodated, the scraper plate (71) is pivotable upward when the carriage (3) enters the furnace.

  In the second aspect of the invention, when the carriage moves out of the furnace, the scraper scraper moves in the pit and scrapes the scale accommodated therein. Therefore, it is not necessary to remove the scale from the pit, and a decrease in operation efficiency associated with the removal work is avoided. When the carriage enters the furnace, the scraper is appropriately rotated upward so that the scale in the pit is not scratched.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  As described above, according to the sealing device for a heating furnace of the present invention, the sealing performance is not impaired by the generation of the scale, and the operation efficiency can be maintained high because the effort for refilling the sealing material is not required. .

  FIG. 1 shows a half cross-sectional view of the lower end portion of the left and right symmetrical shape of the cart type heating furnace, and FIG. 2 shows a cutaway perspective view of the lower end portion of the cart type heating furnace as viewed from the side. The furnace wall of the heating furnace E has a substantially gate-shaped cross section that opens downward as a whole, and FIGS. 1 and 2 show the lower end of one of the side walls 1. The inner wall 11 (FIG. 1) of the side wall 1 is made of a refractory material, and a wall 2 formed by forming a refractory material 22 on a frame 21 is formed at the lower end of the inner wall 11 inside the furnace. Projected toward the direction.

  Each said figure has shown the state which made the trolley | bogie 3 approach into the furnace, and the trolley | bogie 3 is located between the right-and-left side walls 1 of the heating furnace E, closes the open part of the said heating furnace E, and closes the hearth. It is composed. In other words, the carriage 3 includes a horizontal frame 31, and a floor wall 32 made of a refractory material having a predetermined thickness is formed on the frame 31. The floor wall 32 is located at substantially the same height as the wall 2, and a heated material W such as a large forged steel product placed on the skit S is placed on the floor wall 32.

  The outer edge of the floor wall 32 approaches the inner edge of the wall 2, and a gap 4 extending in the vertical direction while being bent in the form of a polygonal line is formed between them. Two rail bodies 33 project from the lower surface of the frame 31 at left and right positions (only one is shown in FIG. 1), and these rail bodies 33 are placed on the small-diameter shafts on both sides of the roller body 35. A plurality of roller bodies 35 are connected to each other by connecting members 34 in the front-rear direction of the heating furnace E (the vertical direction in FIG. 1). The roller body 35 has a central large diameter portion mounted on a guide rail 36 embedded in the ground surface and rolls. With such a structure, the carriage 3 is pulled out of the heating furnace E by the rack-and-pinion mechanism (not shown) driven by the motor, and the advance position where the carriage 3 is pulled out of the heating furnace E (the front side in FIG. 1 or the left side in FIG. 2). Moved between.

  Sealing material storage tanks 51 are provided along both sides of the frame 31 (only one is shown in FIG. 1). The sealing material storage tank 51 has a U-shaped cross section that opens upward, and extends in a bowl shape along the frame 31 in the front-rear direction (FIG. 2). The sealing material storage tank 51 is located immediately below the lower opening 41 of the gap 4 (FIG. 1). In the sealing material storage tank 51, dolomite fine particles 61 are first accommodated as a sealing material up to a certain height. A sealing plate 52 is inserted into the sealing material storage tank 51 from above, and the tip (lower end) of the sealing plate 52 enters the dolomite 61 layer.

  The seal plate 52 has an upper end 521 bent horizontally, and the horizontal upper end 521 is supported on the frame 21 of the wall 2 by a support bolt (not shown) having a spring member 53 disposed around it. The spring member 53 is set to exert a spring force that urges the seal plate 52 downward. As shown in FIG. 3, a round bar 54 is joined to the lower end portion of the seal plate 52 in the longitudinal direction along this, and the front and rear ends (see FIG. (3 indicates the front end) 541 is curved obliquely upward. The seal plate 52 has the same length as the seal material storage tank 61 and extends along the same, but is divided at a plurality of positions in the longitudinal direction, and each divided portion is provided at a plurality of positions on the frame 21, respectively. It is supported by a support bolt provided with the spring member 53 and biased downward.

  A pit P is provided in the front-rear direction on the ground surface below the sealing material storage tank 51. On the other hand, an arm 37 projecting sideways is provided at the rearmost end position as the entry end of the carriage frame 31, and the scraper 7 is provided on the lower surface thereof. The scraper 7 includes a scraping plate 71, and the scraping plate 71 is positioned in a standing posture in the pit P. The scraper plate 71 has an upper end coupled to the lower surface of the arm 37 by a shaft member 72 (FIG. 1) so that the scraper 71 can be swung forward from a standing posture and can be swung forward. It is regulated by an abbreviated stopper.

  In the sealing device having such a structure, the initial seal is ensured by blocking the outside air and the inside of the furnace by the lower end portion of the seal plate 52 entering the dolomite 61 layer in the sealant storage tank 51. The fine particles of dolomite 61 overflow from the inside of the sealing material storage tank 51 and decrease every time the carriage 3 repeatedly advances and enters the furnace. Here, when the carriage 3 is moved, the scale 62 peeled off from the material to be heated W on the floor wall 32 is dropped and supplied into the sealing material storage tank 51 opened below the gap 4 (FIG. 1). While dropping the bent gap 4, the scale 62 hits the outer edge of the carriage floor wall 32 forming the gap 4 and the inner edge of the eaves wall 2 and is reduced in size. Further, when falling into the sealant storage tank 51, the seal plate 52 urged downward by the spring member 53 is crushed by moving while riding on the scale 62 that has fallen, and is made into fine particles or fragments. It becomes. At this time, since the round bar 54 having the front end 541 and the rear end curved obliquely upward as described above is joined to the lower end portion of the seal plate 52, the frictional resistance is reduced and the scale 62 is connected to the scale 62. The seal plate 52 can be smoothly ridden and moved in the ridden state.

  The scale 62 that has been finely divided and cut into pieces functions as a sealing material similar to the dolomite 61, and the lower end of the sealing plate 52 penetrates into the scale 62 so that the outside air and the inside of the furnace are shut off. And airtightness is maintained. Thus, even if the dolomite 61 initially stored in the seal material storage tank 51 overflows from the inside of the seal material storage tank 51 as the carriage 3 advances into and out of the furnace, and is reduced, the dolomite 61 is successively supplied in a falling manner. The scale 62 functions as a sealing material in place of the dolomite 61, and the sealing performance of the heating furnace E is maintained. As described above, it is not necessary to replenish the sealing material, and therefore it is possible to avoid a decrease in operation efficiency due to the sealing material replenishment operation.

  The dolomite 61 and the scale 62 overflowing from the sealing material storage tank 51 fall into the pit P below and are accommodated. Here, in this embodiment, since the scraper 7 is provided at the rearmost position of the carriage frame 31, the scraper 71 of the scraper 7 moves forward in the pit P when the carriage 3 moves out of the furnace. Then, the dolomite 61 and scale 62 accommodated here are scraped out of the front furnace.

  In this way, every time the carriage 3 is moved out of the furnace, the scale 62 and the like in the pit P are removed, so that there is no need for the removal work, and a decrease in operation efficiency associated with the removal work is avoided. Since the scraper plate 71 can be flipped up forward, when the carriage 3 enters the furnace, the scraper plate 71 jumps forward as appropriate, so that the dolomite 61 and the scale in the pit P Return to the rear end position without scratching 62.

  In the said embodiment, you may make it provide the sealing material storage tank 51 in the side wall 1 side of a furnace, and provide the sealing board 52 in the cart 3 side.

It is a half cross-sectional view of the lower end part of the cart type heating furnace which shows one embodiment of the present invention. It is the fracture | rupture perspective view which looked at the lower end part of the trolley | bogie type heating furnace from the side. It is an edge part side view of a sealing board. It is a schematic sectional drawing which shows the conventional sealing device.

Explanation of symbols

2 ... Wall (side wall), 3 ... Cart, 51 ... Sealing material storage tank, 52 ... Sealing plate, 62 ... Scale, 7 ... Scraper, 71 ... Scraping plate, E ... Heating furnace, W ... Material to be heated, P ... pit.

Claims (2)

A furnace with a furnace wall formed in a substantially gate-shaped cross section is moved into and out of a carriage on which a material to be heated is placed, and the furnace floor of the heating furnace is constituted by the carriage in the ingress state, and the side of the carriage A sealing device for sealing between the edge and the side wall of the heating furnace, the sealing device is provided on one of the cart or the side wall to store a sealing material, and the other side of the cart or the side wall The sealing material storage tank is provided at a position where the scale falling from the carriage can be accommodated and accommodated with a sealing plate that is provided and has a tip portion that is allowed to enter the sealing material of the sealing material storage tank. A sealing device for a heating furnace, wherein the scale is used as a sealing material. A scraper is provided at the entry end position of the carriage, and a scraper of the scraper is positioned in a standing posture in a pit that accommodates the sealing material falling from the sealing material storage tank, and the carriage enters the furnace. The sealing device for a heating furnace according to claim 1, wherein the scraper plate is pivotable upward.

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