JP4988488B2 - Dolly for heating metal products - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a metal product heating carriage that mounts these metal products and enters and conveys them into a heating furnace or a heat treatment furnace in order to heat-treat various metal products.

  In order to perform heat treatment or the like on various metal products M, a metal product heating carriage 20 that carries these metal products M, enters a furnace such as a heating furnace or a heat treatment furnace, and transports the inside of the furnace is usually shown in FIG. As shown in FIG. 4, a brick 3 is placed on a portion excluding the outer peripheral end portion surrounding the steel cart frame 2, and a brick receiver 7 is fixed to the outer peripheral end by welding. The exposed surface is formed by placing and covering a fire-resistant castable 8 containing silica or alumina.

  Since the metal product heating cart 20 having such a configuration is composed of the brick 3, the brick receiver 7, and the castable 8, it has a feature of excellent fire resistance. Further, a gap G is secured between the caster pull 8 and the furnace body 11 so that the castable 8 does not come into contact with the furnace body 11 such as a heating furnace or a heat treatment furnace due to the expansion of the castable 8, and the lower end of the gap G is a sealing material. It is closed at 10b.

An apparatus for performing a heat treatment on a metal product is described in Patent Document 1, for example.
JP 2001-271118 A

  However, in the conventional metal product heating cart 20 described above, the brick receiver 7 is damaged or the castable 8 is damaged due to, for example, the brick receiver 7 being inclined or the castable 8 is expanded by heat. It may be missing. As described above, there is a problem that the repair when the brick receiving object 7, the castable 8 or the members corresponding thereto are faulty is extremely troublesome.

That is, in this metal product heating cart 20, the brick receiver 7 is fixed to the outer peripheral end of the cart frame 2 by welding, and the castable 8 is placed on the exposed surface thereof. When a problem occurs, first, after disassembling the castable 8, the brick receiving material 7 is repaired or replaced, and the castable 8 is placed again.
Therefore, the work is extremely troublesome and requires a lot of time and cost. In addition, since a great deal of time is required for repair, it is necessary to temporarily stop the heating furnace and the like, thereby causing a problem that productivity is lowered.

  Note that Patent Document 1 does not describe a metal product heating cart.

  Accordingly, an object of the present invention is to provide a metal product heating carriage capable of easily and quickly repairing a brick receiving object and a castable or a member corresponding thereto.

In order to achieve the above object, a cart for heating a metal product (1) according to claim 1 of the present invention is mounted with the metal product (M) in order to heat-treat the metal product (M). A carriage that enters the heating furnace and heat treatment furnace and conveys the inside of the furnace,
A steel bogie frame (2);
A main refractory (3) placed flat on the entire carriage frame (2) and carrying the metal product (M) on its upper surface;
A secondary refractory (adjacent to the outer peripheral end face of the main refractory (3) is attached to the upper surface of a mounting portion (5) that is detachably attached to the outer peripheral end face of the carriage frame (2) by a fastening member such as a bolt (9). An exchange member (30) formed by fixing 6) ,
A hollow portion (H) is formed in the carriage frame (2) and the attachment portion (5),
A convex step (2a) is formed on the outer peripheral end surface of the carriage frame (2), and a concave step (5a) engaged with the convex step (2a) is formed on the inner peripheral end surface of the mounting portion (5). The mounting portion (5) is attached to the carriage frame (2) with the fastening member in a state where the convex step portion (2a) and the concave step portion (5a) are engaged,
The auxiliary refractory (6) is constituted by a metal receiving member (7) fixed to the upper surface of the mounting portion (5) and a castable (8) covering at least an exposed surface of the metal receiving member (7), and the castable (8) is continuously provided on the upper surface of the metal receiver (7), the outer peripheral surface side of the main refractory (3) and the inner peripheral surface side of the furnace body (11) facing the furnace, On the inner peripheral surface side of the furnace body (11), the furnace body (11) is provided below the metal object (7) so as to cover the outer peripheral end surface of the mounting portion (5) .

Further, in the metal product heating cart (1) according to claim 2 , the lower surface of the castable (8) on the inner peripheral surface side of the furnace body (11) is the lower surface of the furnace body (11). It is suspended from the lower end of the gap (G) between the castable (8) and the furnace body (11) in contact with the sealing material (10b) of the provided sealing device (10). and said that you are.

  Symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and the best mode for carrying out the invention described later.

According to the metal product heating cart described in the present invention, the auxiliary refractory adjacent to the outer peripheral end surface of the main refractory is attached to the upper surface of the mounting portion that is detachably attached to the outer peripheral end surface of the cart frame by a fastening member such as a bolt. Since the fixed replacement member is provided, the auxiliary refractory can be repaired easily and in a short time.

That is, when the auxiliary refractory is lost, only the replacement member can be removed from the carriage frame by removing the bolt, and then a new replacement member can be attached to the carriage frame with the bolt.
Therefore, the repair of the secondary refractory can be completed very easily and in a short time, thereby reducing the cost required for the repair and reducing the productivity because it is not necessary to stop the heating furnace or the like. Nor.

Furthermore, since the auxiliary refractory is composed of a metal receiver fixed to the upper surface of the mounting portion and a castable covering at least the exposed surface of the metal receiver, the performance of the auxiliary refractory can be improved.

  That is, the main refractory is prevented from slipping from the carriage frame due to the high rigidity of the metal of the received material, and the received material is prevented from being deformed by high heat by the castable covering the exposed surface of the received material. By the action of both of these, excellent performance as a secondary refractory can be exhibited.

Furthermore, since the convex step portion is formed on the outer peripheral end surface of the carriage frame and the concave step portion that engages with the convex step portion is formed on the inner peripheral end surface of the mounting portion, the convex step portion and the concave step portion are engaged. Bolts can be attached and detached in the
Therefore, the repair of the auxiliary refractory can be performed more easily and in a short time.

  A metal product heating cart 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 shows a cart 1 for heating a metal product, and is an enlarged sectional view taken along line AA in FIG. FIG. 2 is a cross-sectional view showing a state in which the replacement member 4 is removed from the carriage frame 2. In addition, the same code | symbol was attached | subjected to the same part as what was shown in the prior art example.

  A cart 1 for heating a metal product according to the present embodiment is a cart that mounts the metal product M on the upper surface and enters the heat treatment furnace and conveys the inside of the furnace in order to heat-treat the metal product M. A carriage frame 2, a main refractory 3, and an exchange member 30 are provided, and the exchange member 30 can be easily separated.

The carriage frame 2 is made of steel, a flat plate is mounted on a steel material assembled in a lattice shape, and moving wheels (or rails) are provided on the bottom surface.
The main refractory 3 is placed flat on the entire top surface of the carriage frame 2, and the metal product M is placed on the top surface. In addition, the main refractory 3 in this embodiment comprises many bricks arranged side by side.

The replacement member 30 includes the attachment portion 5 and the auxiliary refractory 6.
Here, as shown in FIG. 1, the attachment portion 5 is detachably attached to the outer peripheral end surface of the carriage frame 2 by fastening members such as a plurality of bolts 9 (and nuts). The auxiliary refractory 6 is fixed to the upper surface of the attachment portion 5 so as to be adjacent to the outer peripheral end face of the main refractory 3. The position of the upper surface of the auxiliary refractory 6 is the same as the position of the upper surface of the main refractory 3.

In addition, the auxiliary refractory 6 in the present embodiment includes a steel receiving object 7 fixed to the upper surface of the mounting portion 5 by welding (or bolts), and a castable 8 that is placed so as to cover the exposed surface of the receiving object 7. It consists of and.
The castable 8 includes silica and alumina (may include any one of silica and alumina). The upper surface of the metal receiving object 7 and the outer peripheral surface side of the main refractory 3 and the furnace body 11 facing the upper surface. Are provided continuously on the inner peripheral surface side. Note that the inner peripheral surface side of the furnace body 11 of the castable 8 is suspended so as to cover the outer peripheral end surface (vertical surface) of the mounting portion 5.

  Further, this metal product heating cart 1 has a convex step 2a formed on the outer peripheral end surface of the cart frame 2, and a concave step portion engaged with the convex step 2a on the inner peripheral end surface of the mounting portion 5 of the replacement member 30. 5a is formed.

  A sealing device 10 is provided on the lower surface of the furnace body 11 to prevent heat from being released from the gap G between the castable 8 and the furnace body 11. The sealing device 10 is composed of a cylinder 10a and a sealing material 10b, and normally, a rod is extended and the lower end of the gap G is closed with the sealing material 10b. When exchanging the exchange member 30, the rod is contracted and detached from the gap G.

Since the metal product heating cart 1 according to the present embodiment configured as described above includes the replacement member 30 that can be easily detached from the cart frame 2, the auxiliary refractory 6 can be repaired easily and in a short time. It can be carried out.
For example, when the received metal 7 constituting the auxiliary refractory 6 is tilted or the castable 8 is lost, the replacement member 30 is removed from the carriage frame 2 by removing the bolt 9, and then a new replacement member 30 is used instead. This can be dealt with by attaching the bolt 9 to the carriage frame 2. Therefore, the repair of the auxiliary refractory 6 can be completed extremely easily and in a short time, the cost required for the repair can be reduced, and the heating furnace or the like does not need to be stopped at the time of repair, so the productivity is reduced. I will not let you.

  When a gap S is formed between the auxiliary refractory 6 and the main refractory 3 after the new replacement member 30 is attached, the gap S is filled with a filler such as ceramic fiber or a sealing material. Therefore, it is possible to reliably prevent the main refractory 3 from slipping.

  Moreover, since the metal refractory cart 1 is composed of bricks as the main refractory 3, high durability can be maintained due to the excellent fire resistance of the bricks.

Further, since the auxiliary refractory 6 is composed of a metal receiver 7 fixed to the upper surface of the mounting portion 5 and a castable 8 that covers the exposed surface, the main refractory is provided by the high rigidity of the metal receiver 7 (steel). 3 is prevented from slipping from the carriage frame 2 and the castable 8 prevents the received article 7 from being deformed by high heat.
Thereby, durability of a subsidiary refractory material can be improved.

Moreover, since the convex step part 2a is formed in the outer peripheral end surface of the trolley | bogie frame 2, and the concave step part 5a engaged with the convex step part 2a is formed in the inner peripheral end surface of the attachment part 5, the convex step part 2a and The bolt 9 can be attached and detached while the concave step portion 5a is engaged.
Therefore, since the replacement member 30 can be easily replaced, the auxiliary refractory 6 can be repaired more easily and in a short time.

  In the present embodiment, the replacement member 30 is provided in the same length as the castable 8 shown in FIG. By doing so, handling of the replacement member 30 can be made even easier. That is, since only the replacement member 30 in the damaged part of the auxiliary refractory 6 can be replaced in a short range in the longitudinal direction instead of the entire longitudinal direction, the replacement work is easy and economical.

  In addition, the attaching part 5 in this embodiment is formed with the steel plate, and forms the hollow part H of the magnitude | size which can insert an operator's hand. Thereby, the bolt 9 can be easily attached and detached manually. Further, the upper surface and the lower surface of the attachment portion 5 are set to be flush with the upper surface and the lower surface of the carriage frame 2, respectively, so that the attachment portion 5 functions as a part of the carriage at normal times.

  In this metal product heating cart 1, the main refractory 3 and the auxiliary refractory 6 can be made of the same refractory material. By doing so, for example, the types of refractory materials to be stocked can be reduced, and the economic efficiency can be improved.

In addition, the auxiliary refractory 6 in the present embodiment includes a steel receiving object 7 fixed to the upper surface of the mounting portion 5 by welding (or bolts), and a castable 8 that is placed so as to cover the exposed surface of the receiving object 7. However, the entire auxiliary refractory 6 can be made of the same refractory material.
According to this, since the steel receiving material 7 is omitted, the production of the auxiliary refractory 6 can be facilitated and the economy can be improved.

The metal product heating trolley | bogie which concerns on embodiment of this invention is shown, and it is the AA line expanded sectional view of FIG. FIG. 3 is a cross-sectional view showing a state where an exchange member is removed from a carriage frame in the metal product heating carriage shown in FIG. 2. It is a schematic perspective view which shows the cart for metal product heating. It shows the cart for metal product heating which concerns on a prior art example, and is the AA line expanded sectional view of FIG.

Explanation of symbols

1 Metal product heating cart 2 Cart frame 2a Convex step 3 Main refractory (brick)
5 Mounting portion 5a Concave step portion 6 Sub-refractory 7 Received material (brick received material)
8 Castable 9 Bolt 10 Sealing device 10a Cylinder 10b Sealing material 11 Furnace 20 Metal product heating cart 30 Replacement member M Metal product H Hollow part G Gap S Gap

Claims (2)

In order to heat-treat a metal product, a carriage that carries the metal product and enters a heating furnace or a heat treatment furnace and conveys the inside of the furnace,
A steel bogie frame,
A main refractory which is mounted flat on the entire carriage frame and on which the metal product is mounted;
A replacement member formed by fixing a secondary refractory adjacent to the outer peripheral end surface of the main refractory on the upper surface of the mounting portion detachably attached to the outer peripheral end surface of the carriage frame by a fastening member ;
A hollow portion is formed in the carriage frame and the attachment portion,
A convex step portion is formed on the outer peripheral end surface of the carriage frame, and a concave step portion that engages with the convex step portion is formed on the inner peripheral end surface of the attachment portion, and the convex step portion and the concave step portion are engaged. In the state where it is made to attach the attachment portion to the carriage frame with the fastening member,
The auxiliary refractory is composed of a metal receiver fixed to the upper surface of the mounting portion and a castable covering at least an exposed surface of the metal receiver, and the castable is an upper surface of the metal receiver and an outer peripheral surface of the main refractory. On the inner peripheral surface side of the furnace body of the furnace facing the side, and on the inner peripheral surface side of the furnace body, it hangs downward from the metal receiving member so as to cover the outer peripheral end surface of the mounting portion. A cart for heating metal products characterized by being provided . On the inner peripheral surface side of the furnace body, the lower surface of the castable abuts against a sealing material of a sealing device provided on the lower surface of the furnace body, and the lower end of the gap between the castable and the furnace body is closed. The cart for heating metal products according to claim 1, wherein the cart is suspended so as to be removed .

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