JPS6317997Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a heat-insulating cart for a firing kiln for the ceramic industry.

Conventionally, in the cart top of a cart in a ceramic firing kiln such as a tunnel kiln or a shuttle kiln, a core layer is formed by stacking insulating bricks on the cart hardware, and the top and side surfaces of this core layer are covered with clay or other fire-resistant bricks. It was composed of a coating layer made of amorphous refractories such as castable refractories. However, due to the poor insulation effect of the insulating bricks forming the core layer, there was a problem in that a large amount of heat inside the furnace escaped to the outside of the furnace through the cart, resulting in extremely large heat loss. In addition, since tool bricks for shelf frames and products to be fired are loaded onto the top of the cart, it is necessary to have enough pressure resistance to withstand the weight of these materials. It was difficult to change the parts to ones with better insulation properties.

However, in recent years, ceramic fiber insulation materials have been developed that are lightweight and have low heat dissipation and heat storage loss.
From the perspective of energy saving, heat-insulating carts that use this ceramic fiber in the core layer have attracted attention, such as Utility Model Publication No. 57-54557 and Utility Model Application Publication No. 57-162499.
The heat-insulating trolley described in Japanese Utility Model Application Publication No. 166098/1987 has been proposed. However, as shown in Fig. 1A, these heat-insulating carts are constructed by embedding a large number of ceramic blocks in parallel and having a large number of through holes 2 vertically arranged and separated from each other by partition walls 1. Either a core layer is formed, or as shown in FIG. In either case, the outer periphery of the side surface of the cart top is covered with a covering layer 3 made of castable refractories or precast blocks, or refractory bricks are arranged in parallel. Since the coating layer 3 is formed using the same method, the following problems arise.

(1) There are limits to increasing the proportion of ceramic fibers used to reduce heat dissipation and heat storage loss.

(2) In order to prevent the cart from coming into contact with the inner wall of the ceramic kiln and being damaged due to the expansion of the monolithic refractory material and refractory bricks that go around the outer periphery of the cart to form the coating layer 3, It is necessary to provide a gap between the inner wall of the kiln and the inner wall of the kiln for the ceramic industry, and the hardware of the trolley may be burnt out through this gap.
Heat dissipation is unavoidable.

(3) Cracks occur due to expansion and contraction of the refractory that forms the coating layer, silver sand, etc. falls into the joints, and the longitudinal direction of the cart expands and comes into contact with the inner wall of the ceramic firing kiln. As a result, the trolley will need to be repaired.

The present invention solves these problems by providing a plurality of positioning metal fittings on the trolley hardware, fixing a plurality of refractory supports at regular intervals, and fixing a fixed shape made of ceramic fiber on both sides in the width direction of the trolley. By arranging modular products, filling the central space of the cart with ceramic fiber bulk products, and laying ceramic fiber blanket products on top of the bulk products, the usage ratio of ceramic fibers has been expanded, and shelf frame tools have been expanded. The present invention provides an insulated trolley that can withstand the weight of bricks and objects to be fired, saves energy, and extends the life of the trolley.

Hereinafter, an embodiment of the present invention will be explained in detail based on FIGS. 2 to 4, which show an embodiment of the present invention.

The insulating cart for the ceramic firing kiln of the present invention is composed of a positioning fitting 7 provided on a cart hardware 6, a support column 8, and a ceramic fiber 9.

The positioning fittings 7 are positioned on the trolley hardware 6 so that square bars or thin square bricks 11, which will be described later as tool bricks for shelf frames, can be mounted at regular intervals in the longitudinal direction of the cart via the shelf foot bricks 10. is determined, and the positioning metal fittings 7 are arranged so that the length direction of the positioning metal fittings 7 is located slightly inside of both ends of the full width of the trolley metal fittings 6. The location of this positioning metal fitting 7 is determined by the distance from both front and rear ends of the cart on the upper surface side of a support 8a provided at the front and rear of the cart, which will be described later, to the center line on the upper surface side of a support 8b provided in the middle of adjacent carts, and Support post 8 provided in the middle part of
The distances from the center line on the upper surface side of b to the center line on the upper surface side of the support column 8c provided in the middle part of the adjacent carts are determined to be approximately equal, and fixed intervals are provided in the length direction of the carts, for example. An L-shaped metal fitting 7a and a U-shaped metal fitting 7b are used, an example of which is shown in FIG.
L so that a can be fixed on the outer surface of the L-shaped fitting 7a.
In addition, the U-shaped metal fittings 7b are connected to the U-shaped metal fittings 7 in the direction and the downward direction.
It is fixed on the trolley hardware 6 by means of welding or the like so that it can be fixed on the inner surface of b.

Next, positioning metal fittings 7 arranged on the trolley metal fittings 6
The struts 8 are fixed at regular intervals through. This support 8 is made of high alumina or clay refractory bricks,
Alternatively, it may be made of castable refractories, plastic refractories, or other unshaped refractories, e.g.
A straight-shaped refractory with a size of 114 x 80 m/m that is easy to refine is used. Although the size is not limited, the width dimension of the refractory material forming the pillar 8 is the same as the vertical direction of the cart top, and the thickness dimension is the U-shaped metal fitting 7b disposed on the trolley metal fitting 6. It is necessary to determine the inner dimension of the support column 8a to be slightly smaller than the inner dimension of the carriage, and the support columns 8a provided at the front and rear of the carriage are provided with uneven dowels that fit together when the carriage is connected to prevent heat dissipation. The pillars 8 made of refractories prepared in this manner are oriented so that the width direction of the pillars 8 is in the vertical direction of the cart.
are placed on the outside of the L-shaped bracket 7a, and the supports 8b and 8c at the middle of the truck are fitted into the recesses of the U-shaped bracket 7b to stand upright. Fill it with mortar and fix it so that it stands upright at regular intervals along the length of the truck.

Ceramic fibers 9 are provided in the parts other than the positioning metal fittings 7 and the pillars 8 to constitute a cart top. The ceramic fiber 9 is essentially a modular product 9a that forms both sides of the truck in the width direction.
It consists of a bulk product 9b that forms the center part of the cart, and a blanket product 9c that forms the top surface of the cart.Modular products 9a are used for both side surfaces in the width direction of the cart to obtain a regular shape, and from both ends in the width direction of the cart. about
The modular products 9a are arranged side by side to a position that is approximately 250 to 300 m/m inward and fixed with adhesive. A space in the center of the cart formed by the modular product 9a and the support column 8 is filled with a bulk product 9b,
The upper surface of the cart is made by laying a thin layer of blanket 9c on top of the bulk product 9b, or by coating the blanket 9c as necessary, so that the floor surface (upper surface) of the cart is smooth. Configure your cart.

When firing a product to be fired, such as refractory bricks, using the insulated cart configured in this way, a shelf foot brick 10 of a predetermined shape is placed on the support 8, and a square bar or thin square Bricks 11 are mounted on the bridge, rearranged freely to form a shelf frame, and then the products to be fired are loaded.

In this way, positioning metal fittings are provided on the trolley hardware to secure the refractory supports at regular intervals, and ceramic fibers are provided in the areas other than the support supports to form the cart top, and tool bricks are used on the support supports to construct the shelf frame. The load of the products to be fired is supported by the pillars via the tool bricks that form the shelf frame, and the expansion and contraction of the refractories that form the pillars are all carried out by ceramic fibers. As it is absorbed, it has the following effects:

(1) By increasing the use of ceramic fibers with low thermal conductivity, it is possible to reduce heat dissipation to the bottom of the bogie.

(2) Due to the reduction in heat storage and thermal conductivity due to the reduction in the weight of the cart, the temperature of the cart floor surface in the preheating zone of the tunnel kiln can be raised quickly, and the temperature difference between the top and bottom of the fired product is can be reduced, the firing capacity can be improved by increasing the number of feeding carts, and the yield can be improved.

(3) Since both sides of the cart in the width direction are made of ceramic fiber, it is possible to greatly reduce the gap between the cart and the inner wall of the ceramic kiln, and there is no problem even if they come into contact in some cases. Therefore, burnout of the trolley hardware can be prevented, and heat dissipation can also be prevented, resulting in the above (1).
Together with item (2), an energy saving effect of 10% or more can be achieved.

(4) The only refractory material used in the trolley is the pillars, and the expansion and contraction of the refractory is absorbed by the ceramic fibers, so there is no overhang caused by the refractory material as with conventional trolleys, and there is almost no need for repair of the trolley. .
In addition, even if the ceramic fiber module is damaged due to an accident, the damaged part can be easily replaced and repaired using adhesive, and the cost is significantly lower than that of conventional trolleys.

(5) Since there is a space between the floor of the trolley and the products to be fired by forming a shelf frame with tool bricks, it is possible to load and unload the products to be fired onto the trolley using a lift car, improving productivity. The work environment can be improved.

[Brief explanation of the drawing]

FIG. 1 is a front vertical sectional view of a conventional truck, FIGS. 2 to 4 show an embodiment of the present invention, FIG. 2 is a side vertical sectional view, and FIG. A sectional view,
FIG. 4 is a sectional view taken along the line B--B in FIG. 2, and FIG. 5 is a sectional view showing an example of a positioning fitting, and the symbols in the figures are as follows: 1... partition, 2... Through hole, 3...Covering layer, 4...
...Through hole, 5... Ceramic fiber, 6...
Trolley hardware, 7... Positioning metal fittings, 8... Support column, 9
... Ceramic fiber, 10 ... Shelf brick, 11 ... Square bar or thin square brick.

Claims (1)

[Scope of utility model registration request] A plurality of positioning fittings 7 are provided on the trolley hardware 6, and a plurality of refractory columns 8 are fixed at regular intervals. Ceramic fiber shaped modules 9a are arranged on both sides in the width direction of the trolley. A heat-insulating trolley for use in a firing kiln for ceramics, characterized in that a bulk product 9b made of ceramic fiber is filled in a part space, and a blanket product 9c made of ceramic fiber is laid on the bulk product 9b.