CN220951913U - Exhaust device of box-type atmosphere furnace - Google Patents

Abstract

The utility model discloses an exhaust device of a box-type atmosphere furnace, which comprises a box-type atmosphere furnace main body, wherein a heating chamber is arranged on one side of the inside of the box-type atmosphere furnace main body, a rear driving system is arranged in the heating chamber, a front chamber is arranged on one side of the heating chamber, a middle door is arranged between the heating chamber and the front chamber, a front door is arranged on the other side of the front chamber, a quenching tank is arranged at the bottom of the front chamber, an elevator driving cylinder is arranged at the top of the box-type atmosphere furnace main body, the power output end of the elevator driving cylinder is connected with an elevator, the elevator is movably arranged in the front door, a waste gas port is arranged on one side of the top of the front chamber of the box-type atmosphere furnace main body, an exhaust mechanism is arranged in the waste gas port, a smoke exhaust hood is arranged on the upper side of the exhaust mechanism of the box-type atmosphere furnace main body, and a pilot burner is arranged on one side of the exhaust mechanism.

Description

Exhaust device of box-type atmosphere furnace

Technical Field

The utility model belongs to the technical field of exhaust devices of box-type atmosphere furnaces, and particularly relates to an exhaust device of a box-type atmosphere furnace.

Background

For a large box-type atmosphere furnace, the volume of the combustible atmosphere in the furnace is relatively large because the space in the furnace is large, and when the quenching is performed smoothly after heating, the exhaust port is required to be relatively large so as to ensure smooth exhaust. The structure of the existing box-type atmosphere furnace is shown in figure 1, when a workpiece 1.3 is heated in a heating chamber 1.2, a middle door 1.4 is opened, the workpiece 1.3 is transferred to a transitional front chamber 1.5 through a rear driving system 1.1, at the moment, the front chamber 1.5 is influenced by the high-temperature workpiece 1.3, furnace gas rapidly expands, is discharged through an exhaust mechanism 1.11 on the side surface of the front chamber 1.5 and is collected and discharged outside through a smoke discharge collection cover 1.10, the middle door 1.4 is closed after the workpiece 1.3 is in place, and a lifter 1.6 is driven to start to descend into an oil groove 1.8 through an air cylinder 1.7 to finish a quenching process; when the workpiece 1.3 is discharged from the furnace and enters the transition front chamber 1.5, a large amount of gas in the furnace needs to be rapidly discharged due to high-temperature expansion, so that a vent pipe with a sufficient diameter is needed to smoothly discharge the gas from the vent, otherwise, the gas in the furnace cannot be timely discharged, so that the pressure in the furnace is too high, and the front door 1.9 or other structural parts can be damaged. However, as shown in fig. 2, the existing exhaust structure is affected by the installation space around the front chamber 1.5, and two small 6 inch circular pipe exhaust pipes 1.111 are connected from the front chamber 1.5 to a large 10 inch circular pipe exhaust pipe 1.112 to an exhaust port 1.113, and the exhaust port 1.113 controls the pressure in the furnace through a connecting rod 1.114 and counterweight 1.115 structure, and the large-size exhaust port has two problems:

1. When the workpiece 1.3 is not transferred, the furnace atmosphere is stably discharged from the waste gas port and is ignited by the ignition burner 1.116 near the discharge port, but the discharge port is larger in size, so that a larger smoke exhaust hood 1.10 is required for collection because of a larger fire ring 1.117 ignited by the discharge port, and meanwhile, a heat insulation plate is required to be installed near the fire ring 1.117 or the fire ring is required to be far away from equipment components of accessories, so that the appearance structure of the equipment is not compact;

2. When quenching, at this time, the heat source is rapidly disappeared, negative pressure is formed in the furnace, the exhaust port cover plate 1.118 is sucked to close the large-size exhaust port, the cover plate is easy to deform because the cover plate is in the fire source for a long time, and the exhaust port cover plate 1.118 is not tightly sucked to suck air into the furnace during the negative pressure, so that explosion hazard is easy to be caused.

Disclosure of utility model

In view of the above-mentioned problems with the background art, the present utility model has as its object: aims at providing an exhaust device of a box-type atmosphere furnace.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

The utility model provides an exhaust apparatus of box atmosphere furnace, includes box atmosphere furnace main part, the inside one side of box atmosphere furnace main part is equipped with the heating chamber, install back actuating system in the heating chamber, box atmosphere furnace main part is equipped with the antechamber in one side of heating chamber, install the intermediate door between heating chamber and the antechamber, the antechamber is installed to the opposite side of antechamber, the bottom of antechamber is equipped with the quenching tank, the lift actuating cylinder is installed at the top of box atmosphere furnace main part, the power take off end of lift actuating cylinder is connected with the lift, lift movable mounting is in the antechamber, box atmosphere furnace main part is equipped with the exhaust port in one side of the top of antechamber, install exhaust mechanism in the exhaust port, box atmosphere furnace main part is installed the exhaust hood in exhaust mechanism's upside, box atmosphere furnace main part is installed the pilot burner in exhaust mechanism's one side;

the exhaust mechanism comprises a fixing frame, exhaust pipes are arranged on two sides of the fixing frame, the bottoms of the two exhaust pipes are connected with exhaust ports, an exhaust port cover plate is arranged at the top of each exhaust pipe on one side, an exhaust gas guide cover is arranged on the outer side of each exhaust port cover plate on the exhaust pipe, a pilot burner is arranged on the outer side of each exhaust gas guide cover, and an overpressure exhaust cover plate is arranged at the top of the inner side of each exhaust pipe on the other side.

Further defined, the exhaust pipe is sized as a 6 inch round pipe. The exhaust size is small due to the structural design, and subsequent emission combustion is facilitated.

Further defined, the overpressure vent cover plate is slidably mounted within the vent tube. The structural design enables the overpressure exhaust cover plate to move upwards along the exhaust pipe when being opened, so that the exhaust pipe is opened for exhaust, and the overpressure exhaust cover plate can be quickly closed under the atmospheric pressure after the internal pressure is recovered.

The beneficial effects of the utility model are as follows:

1. The utility model has smaller exhaust port during normal operation, forms small fire ring, and does not influence the normal operation of surrounding parts;

2. The small-sized exhaust pipe enables flame burnt for a long time to have small influence on deformation of the flame, and reduces the risk of negative pressure air suction caused by deformation;

The utility model can solve the influence on surrounding parts caused by the exhaust heat dissipation of the box-type atmosphere furnace by improving the exhaust design of the box-type atmosphere furnace, and simultaneously ensure the safety requirement in the negative pressure state in the quenching process.

Drawings

The utility model can be further illustrated by means of non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of a prior art exhaust structure;

FIG. 3 is a schematic view showing the structure of an exhaust apparatus of a box-type atmosphere furnace according to an embodiment of the present utility model;

FIG. 4 is a schematic view of an exhaust mechanism of an exhaust apparatus of a box-type atmosphere furnace according to an embodiment of the present utility model;

The main reference numerals are as follows:

A box-type atmosphere furnace main body 1, a heating chamber 2, a rear driving system 3, a front chamber 4, a middle door 5, a front door 6, a quenching tank 7, an elevator driving cylinder 8, an elevator 9 and an exhaust mechanism 102;

The exhaust mechanism 10, the fixing frame 101, the exhaust pipe 102, the exhaust port cover plate 103, the exhaust guide cover 104 and the overpressure exhaust cover plate 105;

fume extraction hood 11, ignition burner 12, work piece 13.

Detailed Description

In order that those skilled in the art will better understand the present utility model, the following technical scheme of the present utility model will be further described with reference to the accompanying drawings and examples.

As shown in fig. 3 to 4, in the exhaust device of the box-type atmosphere furnace of the present utility model, a heating chamber 2 is provided at one side of the inside of a box-type atmosphere furnace main body 1, a rear driving system 3 is installed in the heating chamber 2, a front chamber 4 is provided at one side of the heating chamber 2 in the box-type atmosphere furnace main body 1, a middle door 5 is installed between the heating chamber 2 and the front chamber 4, a front door 6 is installed at the other side of the front chamber 4, a quenching tank 7 is provided at the bottom of the front chamber 4, a lifter driving cylinder 8 is installed at the top of the box-type atmosphere furnace main body 1, a power output end of the lifter driving cylinder 8 is connected with a lifter 9, the lifter 9 is movably installed in the front door 6, a waste gas port is provided at one side of the top of the front chamber 4 in the box-type atmosphere furnace main body 1, a smoke exhaust hood 11 is installed at the upper side of the exhaust mechanism 10 in the box-type atmosphere furnace main body 1, and a pilot burner 12 is installed at one side of the exhaust mechanism 10;

The exhaust mechanism 10 comprises a fixing frame 101, exhaust pipes 102 are arranged on two sides of the fixing frame 101, bottoms of the two exhaust pipes 102 are connected with exhaust ports, an exhaust port cover plate 103 is arranged at the top of one exhaust pipe 102, an exhaust gas guide cover 104 is arranged on the outer side of the exhaust port cover plate 103 of the exhaust pipe 102, a pilot burner 12 is arranged on the outer side of the exhaust gas guide cover 104, and an overpressure exhaust cover plate 105 is arranged on the top of the inner side of the other exhaust pipe 102.

In this embodiment, when the heating chamber 2 is used, the workpiece 13 is heated, the middle door 5 is opened, the workpiece 13 is moved to the front chamber 4 through the rear driving system 3, the front chamber 4 is affected by the high-temperature workpiece at this time, the gas in the box-type atmosphere furnace main body 1 is rapidly expanded, the gas is discharged through the exhaust mechanism 10 connected with the exhaust gas port at the top of the front chamber 4, the gas is collected and discharged outside through the exhaust hood 11, the middle door 5 is closed after the workpiece 13 is in place, and the lifter 9 is driven to start descending through the lifter driving cylinder 8, so that the workpiece 13 is driven to enter the quenching tank 7 to complete the quenching process.

Wherein, when the exhaust mechanism 10 is exhausted, two 6 inch exhaust pipes 102 are connected with exhaust ports, wherein the opening pressure of the left exhaust pipe 102 is 200pa, and an exhaust guide cover 104 is installed, the pressure in the normal box-type atmosphere furnace main body 1 is set to 200pa, at the moment, an exhaust port cover plate 103 is opened for exhausting and igniting through a pilot burner 12, the flame is concentrated rather than in a divergent state due to the installation of the exhaust guide cover 104, the opening pressure of an overpressure exhaust cover plate 105 at the top of the right exhaust pipe 102 is 1.5Kpa, and the workpiece 13 is not transferred in the box-type atmosphere furnace main body 1 most of the time, so that stable positive pressure 200pa is formed in the box-type atmosphere furnace main body 1, combustion is only discharged from the left exhaust port, when the workpiece 13 is discharged from the furnace, the pressure in the furnace is released rapidly due to gas expansion in the box-type atmosphere furnace main body 1, and the overpressure exhaust cover plate 105 at the right side is rapidly opened and closed and kept in a closed state after the furnace pressure is recovered.

The exhaust tube 102 is preferably sized as a 6 inch round tube. The exhaust size is small due to the structural design, and subsequent emission combustion is facilitated. In practice, other configurations of the exhaust pipe 102 are contemplated as appropriate.

Preferably, the overpressure vent cover plate 105 is slidably mounted within the vent tube 102. This design allows the overpressure vent cover 105 to move up the vent tube 102 when opened, thereby opening the vent tube 102 to vent, and to close quickly at atmospheric pressure after internal pressure is restored. Indeed, other mounting configuration shapes for the overpressure vent cover 105 are contemplated as circumstances may dictate.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims of this utility model, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the utility model disclosed herein.

Claims (3)

1. The utility model provides an exhaust apparatus of box atmosphere stove, includes box atmosphere stove main part (1), the inside one side of box atmosphere stove main part (1) is equipped with heating chamber (2), install back actuating system (3) in heating chamber (2), box atmosphere stove main part (1) are equipped with antechamber (4) in one side of heating chamber (2), install qianmen (5) between heating chamber (2) and antechamber (4), qianmen (6) are installed to the opposite side of antechamber (4), the bottom of antechamber (4) is equipped with quenching groove (7), lift actuating cylinder (8) are installed at the top of box atmosphere stove main part (1), the power take off end of lift actuating cylinder (8) is connected with lift (9), lift (9) movable mounting is in qianmen (6), its characterized in that: the box-type atmosphere furnace comprises a box-type atmosphere furnace main body (1), wherein an exhaust port is formed in one side of the top of a front chamber (4), an exhaust mechanism (10) is arranged in the exhaust port, a smoke exhaust hood (11) is arranged on the upper side of the exhaust mechanism (10) of the box-type atmosphere furnace main body (1), and a igniting burner (12) is arranged on one side of the exhaust mechanism (10) of the box-type atmosphere furnace main body (1);

Exhaust mechanism (10) are including mount (101), blast pipe (102) are installed to the both sides of mount (101), two the bottom and the exhaust gas mouth of blast pipe (102) are connected, wherein one side exhaust gas mouth apron (103) are installed at the top of blast pipe (102), exhaust gas guide cover (104) are installed in the outside of exhaust gas mouth apron (103) in blast pipe (102), fire-inducing nozzle (12) are installed in the outside of exhaust gas guide cover (104), the opposite side overpressure exhaust cover (105) are installed at the inboard top of blast pipe (102).

2. The exhaust apparatus of a box-type atmosphere furnace according to claim 1, wherein: the exhaust pipe (102) is sized as a 6 inch round pipe.

3. The exhaust apparatus of a box-type atmosphere furnace according to claim 2, wherein: the overpressure vent cover plate (105) is slidably mounted within the vent tube (102).