JPH0620077Y2 - Bogie type heating furnace seal structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a seal structure for a trolley-type heating furnace provided with a trolley that can be freely moved in and out of a furnace body.

[Conventional technology]

Conventionally, as shown in FIG. 5 (a), a gutter-shaped sand receiver (24) in which a sealing member (23) extending from the left and right ends of a truck (4) is installed inside a furnace body (1) The sand seal part (A) is formed by putting it in the sand put in the trolley, and as shown in FIG.
The seal member (25) extending from the front and rear ends of (4) is brought into contact with the seal member (26) attached to the rear wall portion (1a) or the lid (1b) of the furnace body (1), and the carriage ( The gas in the furnace did not leak from the gap between 4) and the furnace body (1).

[Problems to be solved by the invention] However, in the sand seal part (A), gas easily leaks through the sand gap, and in the seal part by the contact between the seal members (25) and (26), There was room for improvement in the sealing property because gaps were easily formed and gas leakage was likely to occur.

In particular, when toxic gas is generated in the furnace, there is a high risk of accidents due to gas leakage, while in order to avoid accidents,
When the forced exhaust pressure to the inside of the furnace body (1) is raised and the furnace pressure is made sufficiently lower than the atmospheric pressure, a large amount of air flows into the furnace body (1) from the seal part, and Has a huge exhaust volume, requires a large and expensive toxic gas treatment facility,
In addition, there was a large amount of heat loss due to inflowing air, which was a serious problem.

An object of the present invention is to improve the sealing structure between the trolley and the furnace body so that a highly reliable seal can be reliably obtained and also that the durability is excellent.

[Means for solving problems]

A feature of the present invention is that a first seal member is attached to a carriage that can be freely taken in and out of a furnace body, and the first seal member is disposed close to the furnace body with the carriage put in the furnace body. And a second seal member attached to the furnace body, the first and second seal members being arranged close to each other.
A heat-resistant packing that is pressed against the seal member over its entire length is movably attached to the carriage at a position separated from the first and second seal members, and the heat-resistant packing is pressed into contact with the first and second seal members. The operation means is provided for switching between the state and the seal release state in which the seal member is separated from the first and second seal members. The operation and effect thereof are as follows.

[Action]

That is, in a state where the truck is put in the furnace body and the lid of the furnace body is closed, the frame-shaped heat-resistant packing is attached to the truck body by the operating means over the entire circumference of the truck and the furnace body over almost the entire length. When the second seal member is pressed firmly against the second seal member, a highly reliable seal can be reliably obtained, and gas leakage from the furnace body and air suction into the furnace body can be sufficiently prevented.

Therefore, even if a toxic gas is generated in the furnace body, it is possible to reliably prevent the accident that the toxic gas leaks out of the furnace body, and the toxic gas treatment facility becomes large and expensive due to the intake of air. It is advantageous in safety, equipment cost and operating cost.

Further, since the heat-resistant packing can be separated from the first and second seal members by the operating means when the carriage is moved in and out of the furnace body, the heat-resistant packing rubs against the second seal member as the carriage moves. It is possible to surely eliminate the inconvenient situation of damage due to damage and to improve the durability of the heat-resistant packing so that a good sealing function can be maintained for a long period of time.

[Effect of device]

As a result, air pollution due to gas leakage from the furnace, and
It has become possible to provide a trolley-type heating furnace having excellent safety and economical efficiency, which is capable of sufficiently suppressing an increase in exhaust gas processing load and a decrease in thermal efficiency due to air intake into the furnace.

〔Example〕

 Next, an embodiment will be described with reference to FIGS.

Furnace body (1) with furnace body (1a) and lid (1b) that can be opened and closed by raising and lowering
Forming a pair of left and right rails (3) extending from the inside to the outside of the furnace body (1), a carriage (4) for mounting an object to be heated is installed on the rail (3), and the furnace body (1) The dolly (4) can be freely moved in and out of the inside of the container, so that the object to be heated can be easily taken in and out of the furnace body (1).

Guides (6) for raising and lowering the lid (1b), and rigging such as wires for connecting the lid (1b) and the balance weight (7) to columns (5) standing upright on the left and right of the entrance of the furnace body (1) ( Pulley (9), lid (1b) for 8)
Handle (10) for pressing on the furnace body (1a) with the closed
A fastening device is provided to easily open and close the lid (1b), and
The seal of b) is ensured.

Inside the furnace body (1), U-shaped radiant tubes (11) are arranged side by side on the left and right respectively, and a burner (12) is provided at one end of the radiant tube (11) and an exhaust pipe (13) is provided at the other end. ) Are connected, the radiant tube (11) is heated by hot air, and the object to be heated on the carriage (4) is heated by the radiant heat from the radiant tube (11).

An electric fan (14) is installed in the center of the upper part inside the furnace body (1),
The exhaust gas pipe (15) connected to the rear wall of the furnace body was connected to the toxic gas treatment device (16) to prevent air pollution by configuring it to perform uniform heating by circulating high-temperature gas in the furnace body (1). It is configured to prevent it.

The first seal member (17) is attached to the carriage (4) around the entire circumference, and the first seal member is placed with the carriage (4) inside the furnace body (1).
A second seal member (18) arranged close to the entire length of (7) is attached to the furnace body (1a) and the lid (1b), and the first and second seal members (17), (18) arranged close to each other. ) Is attached to the frame-shaped packing support (20) that is vertically movable on the carriage (4), and the packing support (2)
The heat-resistant packing (19) is configured to be separated from the first and second seal members (17) and (18) by lowering the self-weight of (0).

The six hydraulic jacks (21) are fixed to the bottom of the furnace body (1), and the operating part (22) for expanding and contracting the jacks (21) is provided in the furnace body (1).
(1) Heat-resistant packing provided outside by extending the jack (21)
(19) is in a sealed state in which it is in pressure contact with the first and second seal members (17), (18), and is configured to prevent gas leakage from between the carriage (4) and the furnace body (1), The heat-resistant packing (19) is attached to the first and second sealing members (17), (18) by shortening the jack (21).
The second seal member (18) and the heat-resistant packing (19) are prevented from being worn away when the carriage (4) is taken in and out from the seal release state.

[Another embodiment]

 Next, another embodiment will be described.

The heat-resistant packing (19) is made of ceramic fiber, asbestos, glass fiber, or other suitable material, and the mounting structure of the heat-resistant packing (19) on the carriage (4) can be appropriately changed. In the above embodiment, the heat-resistant packing (19) is arranged below the first and second sealing members (17) and (18), and the heat-resistant packing (19) is lifted to obtain a sealed state and lowered to release the seal. Although the case where it is configured to obtain the state is illustrated, instead of this, for example, the heat-resistant packing (19) is arranged above the first and second seal members (17) and (18) to provide the heat-resistant packing. The seal state may be obtained by descending (19) and the seal release state may be obtained by ascending.

In order to switch the heat-resistant packing (19) between the sealed state and the unsealed state, the jack (21) can be attached to the trolley (4) and various other configuration changes can be made.These operation means (21),
(22) Collectively.

In the case where the jack (21) is constructed by using a hydraulic type as in the above-mentioned embodiment, if the jack (21) is attached to the trolley (4), it will be troublesome in terms of equipment such as piping and operation interlocking mechanism.
When the furnace body (1) is provided as in the above embodiment, such a problem does not occur.

The heating means can be changed appropriately, for example, hot air can be supplied into the furnace body (1), or a radiant burner can be installed in the furnace body (1).

The type of the object to be heated and the purpose of heating are not limited, but the present invention is effective when toxic gas is generated such as roasting of rare metals generating hydrogen fluoride.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a sectional view of a heating furnace, FIG. 2 is a partially cutaway front view of the heating furnace, and FIG. 3 is an exploded perspective view of essential parts, FIG. 4 is a sectional view of a main part.
FIG. 5 shows a conventional example, (a) is a front sectional view, and (b) is a side sectional view. (1) …… Furnace body, (4) …… Bogie, (17) …… First seal member,
(18) …… Second seal member, (19) …… Heat resistant packing, (2
1), (22) …… Operating means.

Claims (1)

[Scope of utility model registration request] 1. A seal structure for a trolley-type heating furnace provided with a dolly (4) which can be freely put in and taken out from the inside of a furnace body (1), wherein the dolly (4) has a first seal around its entire circumference. Material (1
7) is attached, and the second seal member (18) is placed close to the furnace body (1) in the state where the carriage (4) is placed in the furnace body (1) over substantially the entire length of the furnace body (1). Attach to (1),
The first and second sealing members (1
Heat-resistant packing that presses against 7) and (18) over the entire length
(19) is movably attached to the carriage (4) at a position separated from the first and second seal members (17) and (18), and the heat resistant packing (19) is attached to the first and second seals. Material (17), (1
8) Sealing state in which it is pressed against and the first and second sealing members
A seal structure for a trolley type heating furnace provided with operating means (21), (22) for switching to a seal release state separated from (17), (18).