CN216845623U

CN216845623U - Novel pit furnace

Info

Publication number: CN216845623U
Application number: CN202123272951.9U
Authority: CN
Inventors: 林新培; 邹朝辉; 邹峻峰; 俞建新
Original assignee: Gosbel Thermal System Jiangsu Co ltd
Current assignee: Gosbel Thermal System Jiangsu Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-06-28
Anticipated expiration: 2031-12-24

Abstract

The utility model relates to a novel pit furnace, which comprises a furnace wall, a furnace base for sealing the bottom of the furnace wall and a furnace cover for covering the top of the furnace wall; a heating element is arranged on the inner wall of the furnace wall; the furnace base is provided with a bearing base; a bearing seat air channel is formed between the bearing seat and the furnace wall; a plurality of airflow holes are arranged on the bearing seat; the air inlet of the airflow hole is positioned on the side wall of the bearing seat; the air outlet of the airflow hole is positioned on the top surface of the bearing seat; placing a furnace pot with openings at the upper part and the lower part on the bearing seat; a furnace tank air channel is formed between the furnace tank and the furnace wall; a plurality of fans and wind shields are arranged on the furnace cover, and the fans are separated by the wind shields to prevent wind interference among the fans; an air deflector is arranged on the inner wall of the furnace cover below the fan; the air deflector is provided with a return air hole, and the fan blade is positioned above the return air hole; and an air guide channel is formed among the furnace cover, the air baffle and the air guide plate. The utility model has the advantages of forming gas flow internal circulation in the pit furnace, balancing the temperature in the pit furnace and keeping the gas components consistent.

Description

Novel pit furnace

The technical field is as follows:

the utility model relates to a heating furnace technical field, in particular to novel pit furnace.

Background art:

the shaft furnace is widely used in industrial production, such as heat treatment of parts, putting parts into the shaft furnace to perform heating and other processes, so as to obtain better performance. The shaft furnace is generally large, parts are placed in the shaft furnace for heating, and heating sources are not uniformly distributed at all positions in the shaft furnace, so that the parts are not uniformly heated, the process is influenced, and the batch quality is not uniform. In order to overcome the defects, a fan is additionally arranged on the furnace cover of some pit furnaces, and the temperature in the pit furnaces is balanced by blowing, but in this way, the air blown by the fan cannot circulate in the pit furnaces, and the effect of balancing the temperature in the pit furnaces is not obvious.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

The utility model has the following contents:

in order to solve the above problems, the utility model provides a novel pit furnace, include: the furnace comprises a furnace wall, a furnace base for sealing the bottom of the furnace wall and a furnace cover for covering the top of the furnace wall; a heating element is arranged on the inner wall of the furnace wall to heat the pit furnace; the furnace base is provided with a bearing base; a bearing seat air channel is formed between the bearing seat and the furnace wall; a plurality of airflow holes are formed in the bearing seat; the air inlet of the airflow hole is positioned on the side wall of the bearing seat; the air outlet of the airflow hole is positioned on the top surface of the bearing seat; placing a furnace pot with an upper opening and a lower opening on the bearing seat, and placing parts in the furnace pot; a furnace tank air channel is formed between the furnace tank and the furnace wall; a plurality of groups of fans and wind shields are fixedly arranged on the furnace cover, and the fans are separated by the wind shields to prevent wind interference among the fans; an air deflector is arranged on the inner wall of the furnace cover at the lower part of the fan; the air deflector is provided with a return air hole, and the fan blade is positioned at the upper part of the return air hole; and an air guide channel is formed among the furnace cover, the air baffle and the air guide plate.

Furthermore, the air deflector is arc-shaped and extends to the upper part of the air channel of the bearing seat towards the direction of the furnace wall.

Furthermore, a plurality of temperature sensors are arranged on the furnace wall and the furnace cover.

Further, a special gas injection pipe is arranged on the furnace cover; the special gas injection pipe is communicated into the wind guide channel.

Furthermore, an air duct is sleeved outside the furnace tank; the air duct comprises a duct body and a plurality of air guide strips uniformly distributed on the outer wall of the duct body.

Further, an air inlet hole is formed in the lower portion of the furnace wall; and an air outlet is arranged at the upper part of the furnace wall.

Further, heat insulation materials are filled in the furnace wall, the furnace base and the furnace cover; the heat insulating material is short fiber.

Further, the furnace base and the furnace wall can be movably connected; and a sealing ring is arranged between the furnace base and the furnace wall.

Further, the device also comprises a bracket; the furnace wall is placed on the bracket; a telescopic elastic piece is arranged on the bracket; the elastic piece is fixedly provided with a connecting rod; a support column is fixedly arranged on the connecting rod; the support column is fixedly connected with the furnace base.

Compared with the prior art, the utility model discloses a novel pit furnace, set up the fan, set up the deep bead, the aviation baffle, and constitute the wind-guiding passageway by it, there is the return air hole on the aviation baffle, fan blade is on return air hole upper portion, still set up the bearing seat that has a plurality of air current holes, form bearing seat air passage between bearing seat and oven inner wall, place under shed's the stove jar on the bearing seat, form stove jar air passage between stove jar and oven inner wall, the wind that the fan blew out flows through the wind-guiding passageway, get into stove jar air passage, pass through bearing seat air passage again, get into the air current hole of bearing seat, after flow into in the stove jar, the negative pressure that is produced by fan blade rotation again is siphoned away through the return air inlet down, form the air inner loop in pit furnace, solve the inhomogeneous problem of pit furnace temperature completely. The utility model has the advantages of forming air flow internal circulation in the pit furnace, balancing the temperature in the pit furnace and keeping the air components consistent.

Description of the drawings:

FIG. 1 is a schematic view of a novel pit furnace of the present invention;

fig. 2 is a front view of a bearing seat 4 of the novel pit furnace;

FIG. 3 is a top view of the bearing seat 4 of the shaft furnace of the present invention;

fig. 4 is a front view of an air duct 16 of the novel pit furnace of the present invention;

fig. 5 is a top view of the air duct 16 of the novel shaft furnace of the present invention;

fig. 6 is a schematic view of the assembly of the wind shield 11 and the furnace cover 3 of the novel pit furnace of the invention;

the reference signs are: 1-furnace wall, 2-furnace base, 3-furnace cover, 4-bearing base, 401-air inlet, 402-air outlet, 5-furnace tank, 6-bearing base air channel, 7-furnace tank air channel, 8-heating element, 9-temperature sensor, 10-fan, 11-wind shield, 12-wind deflector, 13-wind guide channel, 14-return air hole, 15-special gas injection pipe, 16-wind guide cylinder, 1601-cylinder body, 1602-wind guide strip, 17-wind inlet hole, 18-wind outlet hole, 19-bracket, 20-elastic component, 21-connecting rod, 22-supporting column and 23-sealing ring.

The specific implementation mode is as follows:

the following detailed description of the embodiments of the present invention is provided, but it should be understood that the scope of the present invention is not limited by the embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1, a new pit furnace comprises a furnace wall 1, a furnace base 2 and a furnace cover 3, wherein the bottom of the furnace wall 1 is sealed by the furnace base 2, the furnace cover 3 covers the top of the furnace wall 1, and a plurality of heating elements 8 are arranged on the inner wall of the furnace wall 1, such as: the well-type furnace is heated by the electric thermocouple, the electric heating wire and the like, the furnace base 2 is provided with the bearing base 4, the size of the bearing base 4 is smaller than the internal space of the well-type furnace, and thus a bearing base air channel 6 is formed between the bearing base 4 and the furnace wall 1; as shown in fig. 2 and 3, a plurality of air flow holes are arranged on a bearing seat 4, an air inlet 401 of each air flow hole is arranged on the side wall of the bearing seat 4, an air outlet 402 of each air flow hole is arranged on the top surface of the bearing seat 4, a furnace tank 5 with an upper opening and a lower opening is arranged on the bearing seat 4, components are arranged in the furnace tank 5, the size of the furnace tank 5 is smaller than the inner space of a shaft furnace, so that a furnace tank air passage 7 is formed between the furnace tank 5 and a furnace wall 1, a plurality of groups of fans 10 are fixedly arranged on a furnace cover 3, preferably, as shown in fig. 6, 4 groups of fans 10 are arranged, are uniformly distributed on the furnace cover 3, wind shields 11 are arranged among the fans 10, the wind shields 11 are fixed on the furnace cover 3, and separate the fans 10, so that wind among the fans 10 does not interfere, in order to guide the wind of the fans 10 into the bearing seat air passage 6, wind guide plates 12 are arranged on the inner wall of the furnace cover at the lower part 3 of the fans 10, a plurality of cylindrical metal long rods can be used for fixing the air deflector 12 on the inner wall of the furnace cover 3, the air deflector 12 is provided with a return air hole 14, the blade of the fan 10 is positioned at the upper part of the return air hole 14, and an air guide channel 13 is formed among the furnace cover 3, the wind shield 11 and the air deflector 12. When the fan 10 works, wind blown out by the blades flows through the wind guide channel 13, enters the furnace tank air channel 7, then passes through the bearing seat air channel 6, enters the airflow hole of the bearing seat 4, then flows into the furnace tank 5, is sucked away through the air return opening 14 by negative pressure generated by the rotation of the blades of the fan 10, forms air internal circulation in the shaft furnace, and completely solves the problem of non-uniform temperature in the shaft furnace.

The furnace pot 5 and the bearing seat 4 of the above embodiment are designed separately for the convenience of production and manufacture, and of course, they can be designed integrally as long as the air flow enters from the side wall, exits from the bottom of the furnace pot and enters the interior of the furnace pot.

In order to make the wind of the fan 10 enter the boiler tank air passage 7 more easily, the wind deflector 12 is designed to be arc-shaped and extends to the direction of the boiler wall 1 to the upper part of the bearing seat air passage 6.

In order to conveniently observe the temperature of each area of the pit furnace, a plurality of temperature sensors 9 are arranged on the furnace wall 1 and the furnace cover 3, and the temperature of each area in the furnace is tested and displayed.

Because of the utility model discloses a pit furnace forms an unblocked inner loop in the stove, to special heat treatment process, for example carburization, surface nitriding etc. are more suitable for, to this type of technology, only need set up special gas filling tube 15 on bell 3, let in special gas filling tube 15 in wind-guiding passageway 13, required special gas is followed special gas filling tube 15 and is poured into, and these special gases get into behind wind-guiding passageway 13, can be by even filling in retort 5, guarantee batch product quality stable.

Preferably, in order to ensure uniform internal gas components, as shown in fig. 4 and 5, an air duct 16 is provided outside the furnace tank 5, the air duct 16 includes a main body 1601 and a plurality of air guide strips 1602 uniformly distributed on the outer wall of the main body 1601, and the internal gas is uniformly mixed under the action of the air guide strips 1602.

In industrial production, after the spare part heat treatment was accomplished, need the cooling, place the cooling naturally, all need place for a long time, influence production efficiency, for solving this problem, set up fresh air inlet 17 in oven 1 lower part, set up exhaust vent 18 on oven 1 upper portion, when needing the cooling, blow in cold air from fresh air inlet 17, cold air is through stove jar air passage 7, discharges from exhaust vent 18, spare part in the stove jar 5 can be by rapid cooling.

In order to save energy and preserve heat, heat preservation materials, such as short fibers, are filled in the furnace wall 1, the furnace base 2 and the furnace cover 3.

In the actual production process, pit furnace heating during operation, because of the inside and outside temperature difference of oven, the inflation situation is different, and the surplus of inflation often with 3 jack-ups of bell, causes the bell 3 to seal not tight, influences the technological effect, consequently, the utility model discloses still provide, with stove seat 2 and oven 1 swing joint, with the surplus design of thermal energy to stove seat 2 on, guarantee the sealing to pit furnace of bell 3, for this reason, still set up sealing washer 23 between stove seat 2 and oven 1, guarantee the sealed of stove seat 2 and oven 1.

To the above-mentioned thermal expansion problem of solving that makes the activity of furnace base 2, the utility model discloses still provide an embodiment: specifically, set up support 19, place oven 1 on support 19, set up scalable elastic component 20 on support 19, the fixed connecting rod 21 that sets up on elastic component 20, the fixed support column 22 that sets up on connecting rod 21, support column 22 and stove seat 2 fixed connection, elastic component 20 can design into: the spring sleeve is arranged on the support 19, the spring seat is fixed on the support 19, the lower end of the spring is placed on the spring seat, the sleeve is sleeved outside the spring, the top of the sleeve is pressed on the top end of the spring, the connecting rod 21 is fixed on the sleeve, when the furnace base 2 is stressed to move downwards, the connecting rod 21 drives the sleeve to press the spring downwards, when the pressure of the furnace base 2 disappears, the spring enables the sleeve to move upwards, the sleeve drives the connecting rod 21 to move upwards, and the furnace base 2 is pushed upwards to reset.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A novel pit furnace, comprising: the furnace comprises a furnace wall (1), a furnace base (2) for sealing the bottom of the furnace wall (1) and a furnace cover (3) for covering the top of the furnace wall (1); a heating element (8) is arranged on the inner wall of the furnace wall (1) to heat the pit furnace; the method is characterized in that: the furnace base (2) is provided with a bearing base (4); a bearing seat air channel (6) is formed between the bearing seat (4) and the furnace wall (1); a plurality of airflow holes are formed in the bearing seat (4); the air inlet (401) of the airflow hole is positioned on the side wall of the bearing seat (4); the air outlet (402) of the airflow hole is positioned on the top surface of the bearing seat (4); a furnace pot (5) with openings at the upper part and the lower part is arranged on the bearing seat (4), and parts are arranged in the furnace pot (5); a furnace tank air channel (7) is formed between the furnace tank (5) and the furnace wall (1); a plurality of groups of fans (10) and wind shields (11) are fixedly arranged on the furnace cover (3), and the wind shields (11) separate the fans (10) to prevent wind interference among the fans (10); an air deflector (12) is arranged on the inner wall of the furnace cover (3) at the lower part of the fan (10); the air deflector (12) is provided with a return air hole (14), and the blade of the fan (10) is positioned at the upper part of the return air hole (14); and an air guide channel (13) is formed among the furnace cover (3), the air baffle (11) and the air guide plate (12).

2. The novel shaft furnace as claimed in claim 1, wherein: the air deflector (12) is arc-shaped and extends to the upper part of the air channel (6) of the bearing seat towards the direction of the furnace wall (1).

3. The novel shaft furnace as claimed in claim 1, wherein: a plurality of temperature sensors (9) are arranged on the furnace wall (1) and the furnace cover (3).

4. The novel shaft furnace as claimed in claim 1, wherein: a special gas injection pipe (15) is arranged on the furnace cover (3); the special gas injection pipe (15) is communicated into the wind guide channel (13).

5. The novel shaft furnace as claimed in claim 1, wherein: an air duct (16) is sleeved outside the furnace tank (5); the air duct (16) comprises a duct body (1601) and a plurality of air guide bars (1602) uniformly distributed on the outer wall of the duct body (1601).

6. The novel shaft furnace as claimed in claim 1, wherein: an air inlet hole (17) is arranged at the lower part of the furnace wall (1); an air outlet (18) is arranged at the upper part of the furnace wall (1).

7. The novel shaft furnace as claimed in claim 1, wherein: heat insulation materials are filled in the furnace wall (1), the furnace base (2) and the furnace cover (3); the heat insulating material is short fiber.

8. The novel shaft furnace as claimed in any one of claims 1 to 7, wherein: the furnace base (2) is movably connected with the furnace wall (1); and a sealing ring (23) is arranged between the furnace base (2) and the furnace wall (1).

9. The novel pit furnace of claim 8, characterized in that: also comprises a bracket (19); the furnace wall (1) is placed on the bracket (19); a telescopic elastic piece (20) is arranged on the bracket (19); a connecting rod (21) is fixedly arranged on the elastic piece (20); a support column (22) is fixedly arranged on the connecting rod (21); the supporting column (22) is fixedly connected with the furnace base (2).