CN214655139U

CN214655139U - Box type heat treatment furnace for ring piece

Info

Publication number: CN214655139U
Application number: CN202120505292.XU
Authority: CN
Inventors: 马俊
Original assignee: Nanjing Zhengguang Furnace Industry Co ltd
Current assignee: Nanjing Zhengguang Furnace Industry Co ltd
Priority date: 2020-03-24
Filing date: 2021-03-05
Publication date: 2021-11-09
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses a box heat treatment furnace of ring spare, the furnace body comprises cylindrical stove outer covering, and the inner wall of stove outer covering is equipped with the furnace wall, and the furnace body front side is opened and is equipped with the fire door, the fire door is built by the resistant firebrick of inclined plane, is equipped with the fan ring furnace door of upper and lower operation in the fire door, and the furnace gate internal surface encloses with the furnace body internal surface and synthesizes into cylindrical furnace chamber, and the inner wall of fan ring furnace door is equipped with inclined plane refractory wool, and the furnace gate inclined plane refractory wool seals through the flexible pneumatic seal assembly of double flute with the resistant firebrick's of furnace body inclined plane fit seam, and the furnace body bottom is equipped with the burner port, has inserted the nozzle along furnace circumference tangential direction in the burner port; the top of the furnace body is provided with a discharge flue. The novel ring box type heat treatment furnace has good sealing performance, uniform heating and flexible and convenient opening and closing of the furnace door.

Description

Box type heat treatment furnace for ring piece

Technical Field

The utility model relates to a heat treatment device, in particular to a box-type heat treatment furnace for ring parts.

Background

The ring rolled by metal generally needs to be subjected to heat treatment processes such as normalizing, quenching, annealing, tempering and the like, and the conventional ring heat treatment furnace generally has two types, namely a box type furnace and a well type furnace. The well-type ring heat treatment furnace is designed to be semi-underground, the lower part of the furnace body is arranged in a foundation pit below the bottom surface, and the furnace cover is arranged at the top of the furnace body. The well-type ring piece heat treatment furnace is inconvenient to overhaul, and the operation of opening the furnace cover and taking and placing the ring piece is difficult. The furnace door of the box-type ring heat treatment furnace is designed on the side surface of the furnace body, the sealing performance of the furnace door and the furnace body is poor, and the heat preservation effect is poor.

In addition, the existing box-type and well-type ring heat treatment furnaces have the problems of uneven heat distribution in the furnaces and larger deformation of heat treatment pieces.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a box heat treatment furnace of ring piece with good sealing performance, even heating, flexible and convenient opening and closing of the furnace door.

The utility model adopts the technical proposal that:

an annular box type heat treatment furnace comprises a furnace body arranged on the ground, wherein the furnace body is composed of a cylindrical furnace shell, a furnace lining is arranged on the inner wall of the furnace shell, a furnace opening is formed in the front side of the furnace body and is built by inclined refractory bricks, a fan-shaped annular furnace door running up and down is arranged in the furnace opening, the inner surface of the furnace door and the inner surface of the furnace body are enclosed to form a cylindrical furnace chamber, inclined refractory cotton is arranged on the inner wall of the fan-shaped annular furnace door, a matching seam of the inclined refractory cotton of the furnace door and the inclined refractory bricks of the furnace body is sealed through a double-groove flexible pneumatic sealing assembly, a combustion opening is formed in the bottom of the furnace body, and a burner nozzle is inserted into the combustion opening along the circumferential tangential direction of the furnace chamber; the top of the furnace body is provided with a discharge flue.

Furthermore, the double-groove flexible pneumatic sealing assembly comprises a first guard plate assembly arranged on two side edges of the furnace door, a second guard plate assembly arranged at the furnace opening and a furnace door sealing element arranged on the first guard plate assembly; the furnace gate sealing member is equipped with two sealed notches, and the opening of two sealed notches is towards the second backplate subassembly, installs the high temperature resistant sealing strip that contacts with the second backplate subassembly in the sealed notch opening, the outer end of cooperation seam between high temperature resistant sealing strip closed furnace gate and the fire door.

Furthermore, the first protective plate assembly and the second protective plate assembly respectively comprise two high-temperature-resistant steel plates with overlapped middle parts, the two high-temperature-resistant steel plates are respectively fixed on the furnace door and the furnace mouth through screws, the outer steel plates of the first protective plate and the second protective plate respectively extend and are embedded into the furnace door inclined plane refractory cotton layer and the furnace mouth inclined plane refractory bricks, the outer side surfaces of the steel plates are respectively flush with the inclined plane refractory cotton layer and the outer side surfaces of the inclined plane refractory bricks, and the inclined plane refractory cotton and the inclined plane refractory bricks are matched into a V-shaped matching seam.

Furthermore, the furnace door is opened and closed through a furnace door lifting mechanism, the furnace door lifting mechanism comprises a door-shaped lifting frame, a driving motor arranged on a cross beam of the door-shaped lifting frame, two chain wheel sets driven by the driving motor to rotate and two chains in chain transmission connection with two chain wheels of the two chain wheel sets, one ends of the two chains are fixed on the left side and the right side of the top of the furnace door, the other ends of the two chains are connected with balancing weights, and the weight of the configuration block is greater than the weight of the furnace door.

Furthermore, a rectangular groove is formed in a stand column of the door-shaped lifting frame, a positioning column is arranged on the outer side of the first protective plate of the furnace door, and the positioning column slides up and down in the rectangular groove of the stand column.

Furthermore, a heat exchanger is arranged in the smoke exhaust channel and used for heating water or preheating fuel gas.

The utility model has the advantages that:

1. this box heat treatment furnace of ring spare is installed subaerial, convenient to use, and fan annular furnace gate encloses into cylindrical furnace with the furnace body, and the furnace gate adopts the flexible pneumatic seal subassembly of double flute with the fire door sealed, and the thermal treatment space is big, and is sealed effectual, energy-conserving high-efficient.

2. This novel burner tip of box heat treatment furnace of ring spare arranges at the interior circumferencial direction of circumference of furnace, and the fuel gas passes through the nozzle tangential direction and gets into furnace, forms the vortex in furnace, is favorable to forming temperature evenly distributed's temperature field, makes the annular member in the furnace be heated evenly, and heat treatment quality is high.

Drawings

FIG. 1 is a front view of a ring box type heat treatment furnace according to a first embodiment of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

fig. 4 is an enlarged view at a in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and a preferred embodiment.

Referring to fig. 1 to 4, the present embodiment provides a ring box type heat treatment furnace, which mainly comprises a furnace door 1, a furnace body, a furnace door lifting mechanism 2, a combustion system and a smoke exhaust system.

The whole furnace body is cylindrical and is arranged on the ground through the section steel support. The furnace body is composed of a furnace shell 3, a furnace lining 4 is lined on the inner wall of the furnace shell 3, and the furnace lining 4 comprises a first rock wool layer 41 and a first fiber wool layer 42 which are sequentially arranged from outside to inside. The front side of the furnace body is provided with a furnace mouth which is built by inclined refractory bricks 12. The furnace door 1 which runs up and down is arranged in the furnace opening, the furnace door 1 is in a fan-ring shape, and the inner side of the furnace door is lined with a second rock wool layer 11 and an inclined refractory wool layer 12 in sequence. After the furnace door 1 is closed, the inner side surface of the lining and the inner side surface of the furnace lining of the furnace body enclose a cylindrical furnace chamber, the cylindrical furnace chamber is used for heat treatment of ring pieces, and the bottom of the furnace chamber is provided with a high-temperature resistant sizing block assembly for bearing the ring pieces. A V-shaped seam is arranged between the fire-resistant cotton 12 on the inclined surface of the furnace door and the refractory brick 31 on the inclined surface of the furnace opening. Furnace gate both sides limit is equipped with first backplate subassembly, and fire door lateral surface is equipped with the second backplate subassembly, first, second backplate subassembly all includes two high temperature resistant steel sheets that the middle part overlaps, and high temperature resistant steel sheet passes through the fix with screw on furnace gate and fire door, and the outside steel sheet of first backplate and second backplate subassembly extends respectively and imbeds in fire-resistant cotton layer 12 of furnace gate inclined plane and the fire-resistant firebrick 31 of inclined plane of fire door, and the steel sheet lateral surface is resistant firebrick 31's lateral surface parallel and level with the fire-resistant cotton layer 12 of inclined plane and the inclined plane respectively. The lateral surface of the outside steel sheet of first backplate subassembly is fixed with the steel sealing member, the steel sealing member is equipped with two sealed notches, and the opening of two sealed notches is installed the high temperature resistant rubber sealing strip that contacts with the second backplate in the opening towards the second backplate, and the outer end of V type seam is sealed to the sealing strip. First, second backplate subassembly, steel sealing member, high temperature resistant sealing strip constitute double flute flexible pneumatic seal subassembly 8, and when furnace gate 1 opened upwards or closed downwards, let in compressed air and seal the gap between furnace gate and the fire door jointly through high temperature resistant sealing strip and to V type seam, the leakproofness is good. High-temperature resistant rubber sealing strips are also arranged at the top and the bottom of the inner side of the furnace door and used for sealing the top and the bottom with the furnace body when the furnace door is closed.

The oven door lifting mechanism 2 is arranged above the oven door 1, the oven door lifting mechanism 2 comprises a door-shaped lifting frame 24, a driving motor 21 arranged on a cross beam 241 of the door-shaped lifting frame, two chain wheel sets driven by the driving motor to rotate and two chains 23 which are in chain transmission connection with two chain wheels in the two chain wheel sets and used for lifting the oven door, one end of each chain 23 is fixed at the top of the oven door 1, the other end of each chain 23 is connected with a balancing weight, and the weight of the configuration block is greater than that of the oven door. The upright column 242 of the door-shaped lifting frame is provided with a rectangular groove, the outer side of the first protective plate of the furnace door is provided with a positioning column, and the positioning column slides up and down in the rectangular groove of the upright column 242 to limit the running track of the furnace door, so that the sealing performance of the furnace door and a furnace body is guaranteed. The driving motor 21 drives the chain wheel to rotate forward or reversely, the chain wheel drives the chain 23 to move forward or reversely, the oven door is driven to be opened upwards or closed downwards, and the oven door is convenient to open and close.

The bottom of furnace body is equipped with two burner ports, and two burner ports are equipped with nozzle 6 along furnace body circumference equipartition in the burner port, nozzle 6 inserts furnace along furnace body circumference tangential direction. The fuel gas enters the hearth through the tangential direction of the burner 6, forms a vortex in the hearth, is favorable for forming a temperature field with uniformly distributed temperature, and enables the annular parts in the hearth to be heated uniformly. The side wall of the furnace body is provided with a plurality of temperature measuring resistors 9 from top to bottom for measuring the temperature field distribution in the hearth.

The top center of the furnace body is provided with a smoke outlet which is connected with a smoke outlet 5, a heat exchanger is arranged in the smoke outlet 5, and the heat exchanger heats water or preheats fuel gas to fully utilize the waste heat of the flue gas, thereby reducing the energy consumption. The outlet of the discharge flue 5 is provided with a gate valve.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and the improvements and modifications are also within the protection scope of the present invention.

Claims

1. The annular box type heat treatment furnace comprises a furnace body arranged on the ground, and is characterized in that the furnace body is composed of a cylindrical furnace shell, a furnace lining is arranged on the inner wall of the furnace shell, a furnace opening is formed in the front side of the furnace body and is built by inclined refractory bricks, a fan-shaped annular furnace door which runs up and down is arranged in the furnace opening, the inner surface of the furnace door and the inner surface of the furnace body enclose to form a cylindrical hearth, inclined refractory cotton is arranged on the inner wall of the fan-shaped annular furnace door, a matched seam of the inclined refractory cotton of the furnace door and the inclined refractory bricks of the furnace body is sealed through a double-groove flexible pneumatic sealing assembly, a combustion opening is formed in the bottom of the furnace body, and a burner nozzle is inserted into the combustion opening along the circumferential tangential direction of the hearth; the top of the furnace body is provided with a discharge flue.

2. The ring box heat treatment furnace according to claim 1, wherein the double-groove flexible pneumatic sealing assembly comprises a first shield assembly arranged on two sides of the furnace door, a second shield assembly arranged at the furnace mouth, and a furnace door sealing member arranged on the first shield assembly; the furnace gate sealing member is equipped with two sealed notches, and the opening of two sealed notches is towards the second backplate subassembly, installs the high temperature resistant sealing strip that contacts with the second backplate subassembly in the sealed notch opening, the outer end of cooperation seam between high temperature resistant sealing strip closed furnace gate and the fire door.

3. The ring box type heat treatment furnace according to claim 2, wherein the first and second guard plate assemblies each comprise two high temperature resistant steel plates overlapped at the middle part, the two high temperature resistant steel plates are fixed on the furnace door and the furnace mouth through screws, the outer steel plates of the first and second guard plates respectively extend and are embedded into the furnace door inclined plane refractory cotton layer and the furnace mouth inclined plane refractory brick, the outer side surfaces of the steel plates are respectively flush with the inclined plane refractory cotton layer and the outer side surfaces of the inclined plane refractory bricks, and the inclined plane refractory cotton and the inclined plane refractory bricks are matched to form a V-shaped matching seam.

4. The ring box type heat treatment furnace according to claim 2, wherein the furnace door is opened and closed by a furnace door lifting mechanism, the furnace door lifting mechanism comprises a door-shaped lifting frame, a driving motor arranged on a cross beam of the door-shaped lifting frame, two chain wheel sets driven by the driving motor to rotate and two chains in chain transmission connection with two chain wheels of the two chain wheel sets, one ends of the two chains are fixed on the left side and the right side of the top of the furnace door, the other ends of the two chains are connected with balancing weights, and the weight of the configuration blocks is greater than that of the furnace door.

5. The ring box type heat treatment furnace according to claim 4, wherein the upright post of the door type lifting frame is provided with a rectangular groove, the outer side of the first protective plate of the furnace door is provided with a positioning post, and the positioning post slides up and down in the rectangular groove of the upright post.

6. The ring box heat treatment furnace according to claim 1, wherein a heat exchanger is provided in the exhaust flue for heating water or preheating fuel gas.