阅读说明：本技术 一种步进梁式连续加热炉及其使用方法 (Walking beam type continuous heating furnace and use method thereof ) 是由 徐华瀚 蔡由新 于 2020-11-24 设计创作，主要内容包括：本发明公开了一种步进梁式连续加热炉及其使用方法,包括炉坑、水封槽装置、步进梁装置和加热炉本体,加热炉本体包括炉底、炉体和炉顶,炉体内自进料口到出料口处沿炉体的水平方向依次设置为预热段、加热一段、加热二段和均热段,预热段、加热一段、加热二段和均热段的顶部均设置有结构相同的加热机构和调风机构,步进梁装置包括固定梁和活动梁,固定梁沿着炉体的水平方向间隔对称安装在炉体内的两端,活动梁沿着炉体的水平方向间隔设置在炉体的内部,活动梁的下方设置有多组驱动活动梁上下往复运动和水平往复移动驱动装置。本发明具有结构设计合理、炉内温度容易控制、加热效果均匀、运行稳定、能耗低、使用更加方便的优点。(The invention discloses a walking beam type continuous heating furnace and a using method thereof, the walking beam type continuous heating furnace comprises a furnace pit, a water seal tank device, a walking beam device and a heating furnace body, wherein the heating furnace body comprises a furnace bottom, a furnace body and a furnace top, a preheating section, a heating section and a soaking section are sequentially arranged in the furnace body from a feeding hole to a discharging hole along the horizontal direction of the furnace body, the tops of the preheating section, the heating section and the soaking section are respectively provided with a heating mechanism and an air adjusting mechanism with the same structure, the walking beam device comprises a fixed beam and a movable beam, the fixed beam is symmetrically arranged at two ends in the furnace body at intervals along the horizontal direction of the furnace body, the movable beam is arranged in the furnace body at intervals along the horizontal direction of the furnace body, and a plurality of. The invention has the advantages of reasonable structural design, easy control of the temperature in the furnace, uniform heating effect, stable operation, low energy consumption and more convenient use.)

1. The utility model provides a walking beam formula continuous heating furnace, includes furnace pit (1), water seal tank device, walking beam device and heating furnace body, its characterized in that: the heating furnace body comprises a furnace bottom (2), a furnace body (7) and a furnace top (11), one end of the furnace body (7) is provided with a feed inlet (18), the other end of the furnace body is provided with a discharge outlet (19), the feed inlet (18) and the discharge outlet (19) are provided with automatic lifting furnace doors, a preheating section (701), a heating section (702), a heating section (703) and a soaking section (704) are sequentially arranged in the furnace body (7) from the feed inlet (18) to the discharge outlet (19) along the horizontal direction of the furnace body (7), the tops of the preheating section (701), the heating section (702), the heating section (703) and the soaking section (704) are all provided with a heating mechanism (10) and an air adjusting mechanism which have the same structure,

the heating mechanism (10) comprises a first transverse pipe (101) and a second transverse pipe (102) which are symmetrically arranged on two sides of the top of a furnace top (11), the first transverse pipe (101) and the second transverse pipe (102) are arranged along the length direction of the furnace body (7), a plurality of burners (13) extending into the furnace body (7) are arranged at the bottoms of the first transverse pipe (101) and the second transverse pipe (102) at equal intervals, a first natural gas branch pipe (104) and a first air access pipe (105) are respectively arranged on one side of the first transverse pipe (101), a first proportion adjusting valve (103) is arranged on the first natural gas branch pipe (104), a third proportion adjusting valve (106) is arranged on the first air access pipe (105), a second natural gas branch pipe (107) and a second air access pipe (109) are respectively arranged on one side of the second transverse pipe (102), and a second proportion adjusting valve (108) is arranged on the second natural gas branch pipe (107), a fourth proportion adjusting valve (110) is installed on the second air access pipe (109), a natural gas main pipe (12) is arranged at the top of the furnace top (11) along the length direction of the furnace top (11), one end of the natural gas main pipe (12) is closed, the other end of the natural gas main pipe is communicated with a natural gas source, and a first natural gas branch pipe (104) and a second natural gas branch pipe (107) which correspond to the preheating section (701), the heating section (702), the heating section (703) and the soaking section (704) are communicated with the natural gas main pipe (12);

the air adjusting mechanism comprises an air adjusting plate (14) and an air exhaust tube (9), the air adjusting plate (14) is fixedly installed at the upper part in the furnace body (7), the air adjusting plate (14) is arranged along the horizontal direction of the furnace body (7), a plurality of air adjusting valves (15) are arranged at the center of the air adjusting plate (14) at intervals along the length direction of the furnace body (7), a plurality of temperature sensors (16) are arranged at intervals at two sides of the furnace body (7) at the lower side of the air adjusting plate (14), the temperature sensors (16) are arranged along the length direction of the furnace body (7), a plurality of air exhaust tubes (9) are symmetrically arranged at two sides of the furnace top (11) at the upper side of the air adjusting plate (14), and the air exhaust tubes (9) are arranged along the length direction of the furnace body (7);

the walking beam device comprises fixed beams (4) and movable beams (5), wherein the fixed beams (4) are two, the fixed beams (4) are symmetrically arranged at two ends of the furnace body (7) along the horizontal direction of the furnace body (7), the movable beams (5) are two, the two movable beams (5) are arranged below the two fixed beams (4), the movable beams (5) are arranged inside the furnace body (7) along the horizontal direction of the furnace body (7), a plurality of groups of driving movable beams (5) are arranged below the movable beams (5) and drive devices (6) for driving the movable beams (5) to reciprocate up and down and horizontally, and the driving devices (6) are arranged inside a furnace pit (1) after penetrating through a furnace bottom (2).

2. The walking beam type continuous heating furnace according to claim 1, characterized in that: the driving device (6) is four groups, the lower part of the movable beam (5) corresponding to the preheating section (701), the heating section (702), the heating section (703) and the soaking section (704) is respectively provided with a group, each group of driving device (6) comprises a lifting mechanism for driving the movable beam (5) to ascend and descend and a horizontal mechanism for driving the movable beam (5) to horizontally reciprocate, the lifting mechanism comprises a driving motor (609) and a main speed reducer (601), the driving motor (609) is fixedly installed in the furnace pit (1), the main speed reducer (601) is installed on the driving motor (609), two transmission shafts are installed on the main speed reducer (609), the two transmission shafts face the directions of the two movable beams (5) respectively, a steering machine (608) is installed at the end part of each transmission shaft, two auxiliary speed reducers (610) are installed on two sides of each steering machine (608), all install a cam (602) on the output shaft of every vice speed reducer (610), the top of cam (602) is vertical to be provided with lifter (603), gyro wheel (605) are installed at the top of lifter (603), gyro wheel (605) and the bottom sliding connection of walking beam (5), translation mechanism includes cylinder (607) and linking bridge (606), the cylinder block of cylinder (607) is installed on lifter (603), the lower extreme fixed mounting of linking bridge (606) is on the piston rod of cylinder (607), the upper end fixed mounting of linking bridge (606) is in the bottom of walking beam (5).

3. The walking beam type continuous heating furnace according to claim 2, characterized in that: two limiting plates (604) are installed at intervals up and down in the length direction of furnace pit (1) in furnace pit (1), processing has the spacing hole corresponding with lifter (603) on limiting plate (604), lifter (603) slidable mounting is downthehole at spacing.

4. The walking beam type continuous heating furnace according to claim 1, characterized in that: air adjusting valve (15) quantity and exhaust section of thick bamboo (9) quantity on preheating section (701), one section (702) of heating, heating two-stage process (703) and soaking section (704) reduce in proper order, burner (13) quantity on preheating section (701), one section (702) of heating, heating two-stage process (703) and soaking section (704) increases in proper order, the quantity of temperature sensor (16) on preheating section (701), one section (702) of heating, heating two-stage process (703) and soaking section (704) is the same.

5. The walking beam type continuous heating furnace according to claim 1, characterized in that: all be provided with heat transfer layer (17) on the inner wall of furnace body (7) and furnace roof (11), form inclosed heat accumulation chamber between heat transfer layer (17) and furnace roof (11) and furnace body (7), heat accumulation intracavity interval is provided with heat accumulator (8), is provided with insulation material (3) between adjacent heat accumulator (8).

6. The walking beam type continuous heating furnace according to claim 1, characterized in that: a plurality of limiting grooves are formed between the two fixing beams (4) at equal intervals along the length direction of the fixing beams (4), communication holes penetrating through the fixing beams (4) are vertically processed on the fixing beams (4) corresponding to the limiting grooves, and bypass holes communicated with the communication holes are processed on two sides of the fixing beams (4).

7. The walking beam type continuous heating furnace according to claim 1, characterized in that: the exhaust barrel (9) comprises a barrel body (901), the barrel body (901) comprises a cone section and a cylinder section which are fixedly connected, one end of the cone section is fixedly connected to the furnace top (11), an activated carbon layer (902) is arranged in the cone section, two filter plates (904) are installed in the cylinder section at intervals, a draught fan (903) is installed in the cylinder section between the two filter plates (904), an exhaust pipe (905) is installed at the end part of the cylinder section, and the exhaust pipe (905) is connected with a waste heat utilization system.

8. A use method of a walking beam type continuous heating furnace is characterized by comprising the following steps: the method comprises the following steps:

the first step is as follows: before heating, debugging a natural gas pipeline, an air pipeline and an air regulating mechanism, and then discharging redundant air and natural gas in the furnace body (7);

the second step is that: slightly opening a third adjusting proportional valve (106) and a fourth adjusting proportional valve (110), sending air into the furnace body (7), then slightly opening a first proportional adjusting valve (103) and a second proportional adjusting valve (108), sending natural gas into the furnace body (7), then switching on a power supply for ignition, and after the natural gas is normally ignited, adjusting the first proportional adjusting valve (103), the second proportional adjusting valve (108), the third proportional adjusting valve (106) and the fourth proportional adjusting valve (110) according to the set air proportion and natural gas proportion so as to heat the heating temperature in the furnace body (7) according to a heating curve;

the third step: when a steel billet is heated, the steel billet needing to be heated and rolled is firstly conveyed to a fixed beam (4) in a furnace body (7) from a feeding hole (18), the steel billet moves to a discharging hole (19) of the furnace body (7) step by step along with the circular motion of rising, horizontal advancing, descending and horizontal retreating of a movable beam (4), and in the moving process of the steel billet, the temperatures of a preheating section (701), a heating section (702), a heating section (703) and a soaking section (704) are required to be adjusted in real time through a heating mechanism (10) and an air adjusting mechanism according to the measured value of a temperature sensor (16), so that the temperature of the preheating section (701) is 600-750 ℃, the temperature of the heating section (702) is 1000-1050 ℃, the temperature of the heating section (703) is 1200-1250 ℃, and the temperature of the soaking section (704) is 1250-1280 ℃.

Technical Field

The invention belongs to the technical field of steel making, and particularly relates to a walking beam type continuous heating furnace and a using method thereof.

Background

The walking beam type heating furnace is a continuous heating furnace which transfers the blanks forward one by the actions of ascending, advancing, descending and retreating of the furnace bottom or the water-cooled metal beam. The walking beam furnace is also a continuous furnace, which moves along a certain track (usually a rectangular track) by a special walking mechanism to make the steel material in the furnace advance one by one, so the walking beam furnace is called as a walking beam furnace. When the device is used, the steel material blanks move in the furnace by the up-and-down reciprocating motion of the walking beams, a certain interval is reserved between the steel materials, the steel materials can be heated on four sides, the device has the advantages of high heat efficiency, short heating time, less iron scale, low decarburization possibility, no steel adhesion, no scratch on the surface of the steel materials, contribution to eliminating black marks and improvement of heating quality, and is suitable for heating of various steel materials such as steel ingots, steel billets, plate blanks, round billets and the like. The existing walking beam type heating furnace can be divided into a preheating section, a heating section and a soaking section according to the working process, and specifically comprises a furnace body, a movable beam, a water seal tank with a horizontal bottom surface, a gasification assembly, a heating assembly and the like, wherein the bottom of the furnace body is provided with a plurality of seal boxes arranged at intervals and extending out of the furnace body, the water seal tank is positioned below the furnace body, the lower ends of the seal boxes extend into the water seal tank, the end parts of the seal boxes are submerged below the liquid level of the water seal tank, the movable beam is arranged in the furnace body, the lower part of the movable beam is connected with a movable beam upright post positioned in the seal box, during the work, the movable beam upright post moves in the seal box and drives the movable beam to move, meanwhile, the water seal tank moves along with the movable beam upright post, during the normal work, the movable beam rises under the action of the movable beam upright post and bears a steel billet, then, the preheating section moves to the soaking section through the heating section along, finally, moving the movable beam to the initial position along the horizontal direction after the movable beam is lowered to the initial height; and then, the movable beam rises again and repeats the steps to form a cycle, and particularly, the horizontal movement of the movable beam upright column is realized by virtue of a movable frame connected with a driving device. The heating furnace with the structure has the advantages that firstly, the defects of furnace body structural design are discovered in the actual using process, and when the heating furnace is used for heating, the proportion of the entering air and the natural gas cannot be well allocated, so that the natural gas in the furnace can be burnt insufficiently, and the combustion in the furnace is uneven, so that the heating temperature difference fluctuation range in each heating section in the furnace is large, and the steel material is heated unevenly and unstably; secondly, the structure of the existing walking beam mechanism is complex, and the operation process is unstable; thirdly, the existing heating furnace has larger energy consumption and higher use cost. Therefore, it is objectively needed to develop a walking beam type continuous heating furnace and a using method thereof, wherein the walking beam type continuous heating furnace has the advantages of reasonable structural design, easy control of the temperature in the furnace, uniform heating effect, stable operation, low energy consumption and more convenient use.

Disclosure of Invention

In order to solve the problems in the background art, the invention aims to provide a walking beam type continuous heating furnace and a using method thereof, wherein the walking beam type continuous heating furnace has the advantages of reasonable structural design, easy control of the temperature in the furnace, uniform heating effect, stable operation, low energy consumption and more convenient use.

The invention relates to a walking beam type continuous heating furnace, which comprises a furnace pit, a water seal tank device, a walking beam device and a heating furnace body, wherein the heating furnace body comprises a furnace bottom, a furnace body and a furnace top, one end of the furnace body is provided with a feed inlet, the other end of the furnace body is provided with a discharge outlet, automatic lifting furnace doors are arranged at the feed inlet and the discharge outlet, a preheating section, a heating section and a soaking section are sequentially arranged in the furnace body from the feed inlet to the discharge outlet along the horizontal direction of the furnace body, the tops of the preheating section, the heating section and the soaking section are all provided with a heating,

the heating mechanism comprises a first transverse pipe and a second transverse pipe which are symmetrically arranged on two sides of the top of the furnace top, the first transverse pipe and the second transverse pipe are arranged along the length direction of the furnace body, a plurality of burners extending into the furnace body are arranged at equal intervals at the bottoms of the first transverse pipe and the second transverse pipe, a first natural gas branch pipe and a first air access pipe are respectively arranged on one side of the first transverse pipe, a first proportion regulating valve is arranged on the first natural gas branch pipe, a third proportion regulating valve is arranged on the first air access pipe, a second natural gas branch pipe and a second air access pipe are respectively arranged on one side of the second transverse pipe, a second proportion regulating valve is arranged on the second natural gas branch pipe, a fourth proportion regulating valve is arranged on the second air access pipe, a natural gas main pipe is arranged on the top of the furnace top along the length direction of the furnace top, one end of the natural gas main pipe is closed, the first natural gas branch pipe and the second natural gas branch pipe which correspond to the preheating section, the heating section and the soaking section are communicated with the natural gas main pipe;

the air adjusting mechanism comprises an air adjusting plate and an air exhaust tube, the air adjusting plate is fixedly arranged at the upper part in the furnace body, the air adjusting plate is arranged along the horizontal direction of the furnace body, a plurality of air adjusting valves are arranged at the central position of the air adjusting plate at intervals along the length direction of the furnace body, a plurality of temperature sensors are arranged at intervals at two sides of the furnace body at the lower side of the air adjusting plate, the temperature sensors are arranged along the length direction of the furnace body, a plurality of air exhaust tubes are symmetrically arranged at two sides of the furnace top at the upper side of the air adjusting plate, and the air exhaust tubes are arranged along the;

the walking beam device comprises two fixed beams and two movable beams, the two ends of the fixed beams are symmetrically arranged in the furnace body along the horizontal direction of the furnace body at intervals, the two movable beams are arranged below the two fixed beams, the movable beams are arranged in the furnace body along the horizontal direction of the furnace body at intervals, a plurality of groups of driving movable beams are arranged below the movable beams to reciprocate up and down and a horizontal reciprocating movement driving device, and the driving device penetrates through the furnace bottom and then is arranged in a furnace pit.

Further, the driving devices are four groups, a preheating section, a heating section and a soaking section are respectively arranged below the movable beams, each group of driving devices comprises a lifting mechanism for driving the movable beams to lift up and down and a horizontal mechanism for driving the movable beams to horizontally reciprocate, the lifting mechanism comprises a driving motor and a main speed reducer, the driving motor is fixedly arranged in the furnace pit, the main speed reducer is arranged on the driving motor, two transmission shafts are arranged on the main speed reducer and respectively face the directions of the two movable beams, a steering machine is arranged at the end part of each transmission shaft, two auxiliary speed reducers are arranged on two sides of each steering machine, a cam is arranged on an output shaft of each auxiliary speed reducer, a lifting rod is vertically arranged above the cam, rollers are arranged at the tops of the lifting rods and are connected with the bottoms of the movable beams in a sliding mode, and each translation mechanism comprises a cylinder and a connecting support, the cylinder seat of cylinder is installed on the lifter, and the lower extreme fixed mounting of linking bridge is on the piston rod of cylinder, and the upper end fixed mounting of linking bridge is in the bottom of walking beam.

Furthermore, two limiting plates are arranged in the furnace pit at intervals along the length direction of the furnace pit, limiting holes corresponding to the lifting rods are processed in the limiting plates, and the lifting rods are slidably arranged in the limiting holes.

Further, the number of air adjusting valves and the number of air exhaust cylinders on the preheating section, the heating section and the soaking section are sequentially reduced, the number of burners on the preheating section, the heating section and the soaking section is sequentially increased, and the number of temperature sensors on the preheating section, the heating section and the soaking section is the same.

Furthermore, heat transfer layers are arranged on the inner walls of the furnace body and the furnace top, a closed heat storage cavity is formed between the heat transfer layers and the furnace top and the furnace body, heat accumulators are arranged in the heat storage cavity at intervals, and heat insulation materials are arranged between the adjacent heat accumulators.

Furthermore, a plurality of limiting grooves are formed between the two fixing beams at equal intervals along the length direction of the fixing beams, a communicating hole penetrating through the fixing beams is vertically processed on the fixing beam corresponding to each limiting groove, and bypass holes communicated with the communicating hole are processed on two sides of the fixing beams.

Further, the exhaust cylinder comprises a cylinder body, the cylinder body comprises a cone body end and a cylinder section which are fixedly connected, one end of the cone section is fixedly connected to the furnace top, an activated carbon layer is arranged in the cone section, two filter plates are installed in the cylinder section at intervals, an induced draft fan is installed in the cylinder section between the two filter plates, an exhaust pipe is installed at the end part of the cylinder section, and the exhaust pipe is connected with a waste heat utilization system.

The invention relates to a using method of a walking beam type continuous heating furnace, which comprises the following steps:

the first step is as follows: before heating, debugging a natural gas pipeline, an air pipeline and an air regulating mechanism, and then discharging redundant air and natural gas in the furnace body;

the second step is that: slightly opening a third adjusting proportional valve and a fourth adjusting proportional valve, feeding air into the furnace body, then slightly opening a first proportional adjusting valve and a second proportional adjusting valve, feeding natural gas into the furnace body, then switching on a power supply for ignition, and after the natural gas is normally ignited, adjusting the first proportional adjusting valve, the second proportional adjusting valve, the third proportional adjusting valve and the fourth proportional adjusting valve according to the set air proportion and natural gas proportion so as to heat the heating temperature in the furnace body according to a heating curve;

the third step: when a steel billet is heated, the steel billet needing to be heated and rolled is conveyed to a fixed beam in a furnace body from a feeding hole, the steel billet moves to a discharging hole of the furnace body step by step along with the circular motion of the rising, horizontal advancing, descending and horizontal retreating of a movable beam, and the temperature of a preheating section, a heating first section, a heating second section and a soaking section is adjusted in real time through a heating mechanism and an air adjusting mechanism according to the measured value of a temperature sensor in the moving process of the steel billet, so that the temperature of the preheating section is 600-750 ℃, the temperature of the heating first section is 1000-1050 ℃, the temperature of the heating second section is 1200-1250 ℃, and the temperature of the soaking section is 1250-1280 ℃.

Compared with the prior art, the invention has the following advantages:

firstly, on the basis of the prior art, the furnace body is divided into four heating temperature zones of a preheating section, a heating section and a soaking section, so that the heating temperature of the steel material can be more evenly divided and refined, the uniformity of the integral heating of the steel material is favorably ensured, the heating time of the steel material in the furnace body can be further shortened, and the heating efficiency is improved;

secondly, each section of heating temperature area is provided with a heating mechanism, so that the heating temperature of each section of heating temperature area is independently controlled, the temperature of each section of heating temperature area is not affected, meanwhile, each section of heating temperature area is provided with a proportion for blending natural gas and air, the proportion for blending natural gas and air entering the furnace body can be accurate, the natural gas entering the furnace body can be fully combusted, the heating temperature of each heating section is ensured by adjusting the number of burners in each temperature heating area, so that the uniformity of the heating temperature of the steel material is ensured, the heating mechanism with the structure can ensure that the natural gas is combusted more thoroughly on the premise of ensuring better heating effect, the combustion efficiency of the natural gas can be improved, the energy consumption can be reduced, and the use cost can be controlled;

thirdly, the arranged air adjusting mechanism can adjust the temperature of each heating section in real time, when the temperature in any section of heating section is higher than the actual heating temperature, the air adjusting valve can be opened, and hot air in the furnace body is partially discharged through the exhaust cylinder, so that the heating temperature in each heating section is ensured to be constant and stable, and the heating efficiency of the heating furnace is higher;

fourthly, the walking beam structure stability who sets up is good, can make the walking beam rise, go forward, descend and the step action of moving back more steady, can effectual improvement steel material at the stationarity of step-by-step in-process, prevents that the steel material from dropping, the phenomenon of collision takes place.

In conclusion, the invention has the advantages of reasonable structural design, easy control of the temperature in the furnace, uniform heating effect, stable operation, low energy consumption and more convenient use, and has better popularization and utilization values and easy popularization and use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a structural arrangement diagram of the heating means 10 on the furnace roof 11;

FIG. 3 is a top cross-sectional view of the present invention;

fig. 4 is a front view of the driving device 6 of the present invention.

FIG. 5 is a top view of the drive unit 6 of the present invention;

FIG. 6 is a schematic structural view of the exhaust funnel 9;

in the figure, 1-furnace pit, 2-furnace bottom, 3-heat insulation material, 4-fixed beam, 5-movable beam, 6-driving device, 601-main reducer, 602-cam, 603-lifting rod, 604-limit plate, 605-roller, 606-connecting support, 607-cylinder, 608-steering gear, 609-driving motor, 610-auxiliary reducer, 7-furnace body, 701-preheating section, 702-heating section, 703-heating section, 704-soaking section, 8-heat accumulator, 9-exhaust barrel, 901-barrel, 902-activated carbon layer, 903-filter plate, 904-induced draft fan, 905-exhaust pipe, 10-heating mechanism, 101-first transverse pipe, 102-second transverse pipe, 103-a first proportion regulating valve, 104-a first natural gas branch pipe, 105-a first air access pipe, 106-a third proportion regulating valve, 107-a second natural gas branch pipe, 108-a second proportion regulating valve, 109-a second air access pipe, 110-a fourth proportion regulating valve, 11-a furnace top, 12-a natural gas main pipe, 13-a burner, 14-an air adjusting plate, 15-an air adjusting valve, 16-a temperature sensor, 17-a heat transfer layer, 18-a feeding hole and 19-a discharging hole.

8-output mechanism.

Detailed Description

The invention is further illustrated by the following description of embodiments and the accompanying drawings, without in any way limiting the invention, and any alterations or substitutions made on the basis of the teachings of the invention shall fall within the scope of protection of the invention.

As shown in figures 1-6, the walking beam type continuous heating furnace of the invention comprises a furnace pit 1, a water seal tank device, a walking beam device and a heating furnace body, wherein the structure of the water seal tank device is the prior art, the heating furnace body comprises a furnace bottom 2, a furnace body 7 and a furnace top 11, one end of the furnace body 7 is provided with a feed inlet 18, the other end is provided with a discharge outlet 19, automatic lifting furnace doors are arranged at the feed inlet 18 and the discharge outlet 19, a preheating section 701, a heating section 702, a heating section 703 and a soaking section 704 are sequentially arranged in the furnace body 7 from the feed inlet 18 to the discharge outlet 19 along the horizontal direction of the furnace body 7, the tops of the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 are all provided with a heating mechanism 10 and an air adjusting mechanism which have the same structure, the furnace body 7 is divided into four sections of a preheating section 701, a heating section 702, the heating temperature of the steel material can be updated in one step and is uniformly divided and refined, the uniformity of integral heating of the steel material is favorably ensured, the heating time of the steel material in the furnace body can be further shortened, the heating efficiency is improved, the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 are arranged in the furnace body 7, each steel material sequentially passes through the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 to be heated, the stress of the steel material in the bending process can be effectively prevented, and therefore the workpiece is prevented from being broken in the bending process.

The heating mechanism 10 comprises a first transverse pipe 101 and a second transverse pipe 102 which are symmetrically arranged on two sides of the top of a furnace roof 11, the first transverse pipe 101 and the second transverse pipe 102 are arranged along the length direction of the furnace body 7, a plurality of burners 13 extending into the furnace body 7 are arranged at equal intervals at the bottoms of the first transverse pipe 101 and the second transverse pipe 102, a first natural gas branch pipe 104 and a first air inlet pipe 105 are respectively arranged on one side of the first transverse pipe 101, a first proportion regulating valve 103 is arranged on the first natural gas branch pipe 104, a third proportion regulating valve 106 is arranged on the first air inlet pipe 105, a second natural gas branch pipe 107 and a second air inlet pipe 109 are respectively arranged on one side of the second transverse pipe 102, a second proportion regulating valve 108 is arranged on the second natural gas branch pipe 107, a fourth proportion regulating valve 110 is arranged on the second air inlet pipe 109, a natural gas main pipe 12 is arranged at the top of the furnace roof 11 along the length direction of the furnace roof 11, one end of the natural gas main pipe 12 is closed, the other end is communicated with a natural gas source, a first natural gas branch pipe 104 and a second natural gas branch pipe 107 which correspond to the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 are communicated with the natural gas main pipe 12, when each section of heating section is heated, the natural gas main pipe is communicated with the natural gas source, before heating, the natural gas pipeline, the air pipeline and the air regulating mechanism are debugged, then redundant air and natural gas in the furnace body 7 are discharged, then a third regulating proportional valve 106 and a fourth regulating proportional valve 110 are slightly opened, air is fed into the furnace body 7 through a first air access pipe 105 and a second air access pipe 109, then a first proportional regulating valve 103 and a second proportional regulating valve 108 are slightly opened, natural gas is fed into the furnace body 7 through the first natural gas branch pipe 104 and the second natural gas branch pipe 107, after natural gas and air are mixed, the mixture enters each burner 13, then the mixture is ignited by connecting a power supply, after the natural gas at the burner is normally ignited, the first proportion regulating valve 103, the second proportion regulating valve 108, the third proportion regulating valve 106 and the fourth proportion regulating valve 110 are regulated according to the set air proportion and the natural gas proportion so as to heat the heating temperature in the furnace body 7 according to a heating curve, a heating mechanism 10 is arranged at each section of heating temperature area to realize the independent control of the heating temperature of each section of heating temperature area, the temperature of each section of heating temperature area is not influenced mutually, meanwhile, the proportion of natural gas and air in each section of heating temperature area is set, the proportion of natural gas and air in the furnace body 7 can be accurate, the natural gas in the furnace body 7 can be fully combusted, and the heating temperature of each heating section can be ensured by adjusting the number of the burners 13 in each temperature heating area, in order to guarantee the homogeneity of steel material heating temperature, the heating mechanism of this structure can guarantee under the prerequisite of better heating effect, can also make the natural gas burning more thorough, can improve the combustion efficiency of natural gas, can also reduce the energy consumption, the cost of control use, in the in-process of each heating zone heating, each heating mechanism 10 heats, make the temperature of preheating section 701 be 600 ~ 750 ℃, the temperature of heating section 702 is 1000 ~ 1050 ℃, the temperature of heating second section 703 is 1200 ~ 1250 ℃, the temperature of soaking section 704 is 1250 ~ 1280 ℃, when the temperature sensor 16 of each heating section detects that the actual temperature of each heating section is less than required standard temperature, can increase the burning quantity of nozzle, thereby adjust the heating temperature in each heating section.

In order to adjust the temperature of each heating section in real time, the air adjusting mechanism comprises an air adjusting plate 14 and an air exhaust tube 9, the air adjusting plate 14 is fixedly installed at the upper part in the furnace body 7, the air adjusting plate 14 is arranged along the horizontal direction of the furnace body 7, a plurality of air adjusting valves 15 are arranged at the central position of the air adjusting plate 14 at intervals along the length direction of the furnace body 7, a plurality of temperature sensors 16 are arranged at intervals at two sides of the furnace body 7 at the lower side of the air adjusting plate 14, the temperature sensors 16 are arranged along the length direction of the furnace body 7, a plurality of air exhaust tubes 9 are symmetrically arranged at two sides of the furnace top 11 at the upper side of the air adjusting plate 14, the air exhaust tubes 9 are arranged along the length direction of the furnace body 7, when the temperature sensors 16 in each heating section detect that the actual heating temperature of a certain section is higher than the standard temperature, on one hand, the combustion amount of natural gas can be reduced, on the, the hot air in the furnace body 7 is properly discharged, part of the hot air is collected at the top of the furnace body 7, and the hot air is discharged out of the furnace body 7 through the air discharge barrel 9, so that the effect of quickly adjusting the temperature is achieved.

The walking beam device comprises fixed beams 4 and movable beams 5, the fixed beams 4 are two, the fixed beams 4 are symmetrically arranged at two ends of the furnace body 7 along the horizontal direction of the furnace body 7, the movable beams 5 are two, the two movable beams 5 are arranged below the two fixed beams 4, the movable beams 5 are arranged inside the furnace body 7 along the horizontal direction of the furnace body 7, a plurality of groups of driving movable beams 5 are arranged below the movable beams 5 to reciprocate up and down and a horizontal reciprocating movement driving device 6, the driving device 6 runs through the furnace bottom 2 and then is arranged inside the furnace pit 1, the set walking beams are good in structural stability, the walking actions of the movable beams 5 in ascending, advancing, descending and retreating can be more stable, the stability of the steel material in the stepping process can be effectively improved, and the phenomena of falling and collision are prevented.

Most of driving devices used in the prior art are crank-link mechanisms, preferably, the driving devices 6 are four groups, a group of driving devices is respectively arranged below the movable beam 5 corresponding to the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704, each group of driving devices 6 comprises a lifting mechanism for driving the movable beam 5 to lift up and down and a horizontal mechanism for driving the movable beam 5 to horizontally reciprocate, each lifting mechanism comprises a driving motor 609 and a main speed reducer 601, the driving motor 609 is fixedly arranged in the furnace pit 1, the main speed reducer 601 is arranged on the driving motor 609, two transmission shafts are arranged on the main speed reducer 609 and respectively face the two movable beams 5, a steering gear 608 is arranged at the end of each transmission shaft, two auxiliary speed reducers 610 are arranged on two sides of each steering gear 608, and a cam 602 is arranged on the output shaft of each auxiliary speed reducer 610, a lifting rod 603 is vertically arranged above the cam 602, a roller 605 is arranged at the top of the lifting rod 603, the roller 605 is connected with the bottom of the movable beam 5 in a sliding manner, a driving motor 609 drives the main speed reducer 412 to rotate, a transmission shaft on the main speed reducer 412 is connected with an input shaft of a steering machine 608, the output direction of the power of the steering machine 608 is changed through a bevel gear in the steering machine 608, and further an output shaft of a secondary speed reducer 610 is driven to rotate, so that the cam 602 is driven to rotate in the same direction, the lifting rod 603 is driven to lift through the cam 602, and accordingly the movable beam 5 is lifted along with the lifting rod 603, the translation mechanism comprises an air cylinder 607 and a connecting bracket 606, a cylinder seat of the air cylinder 607 is arranged on the lifting rod 603, the lower end of the connecting bracket 606 is fixedly arranged on a piston rod of the air cylinder 607, and the upper end of the, the cylinder 607 is prior art, and the piston rod extension of cylinder 607 or shorten, just can drive walking beam 5 through linking bridge 606 and remove about, and driving motor 609, main speed reducer 601 and vice speed reducer 610 are prior art, and is concrete, and drive arrangement 6's working process is:

the steel material is put into the fixed beam 4 from the feeding hole 18, the translational driving mechanism drives the movable beam 5 to move a station towards the discharging hole 19, the lifting driving mechanism drives the movable beam 5 to rise to be higher than the fixed beam 4, so that the movable beam 5 lifts the steel material on the fixed beam 4, meanwhile, the translational driving mechanism drives the movable beam 5 to retreat a station towards the feeding hole 18, the lifting driving mechanism drives the movable beam 5 to fall to be lower than the fixed beam 4, so that the steel material on the movable beam 5 is placed on the fixed beam 4, at the moment, the steel material on the fixed beam 4 moves a station relative to the movable beam 5 before, the next steel material is placed at one end of the fixed beam 4, the translational driving mechanism drives the movable beam 5 to move a station towards the discharging hole 19, so that the steel material on the fixed beam 4 is placed on the movable beam 5, and the steel material placed at the last time moves a station along the fixed beam 4, so circulate, until put into the steel material on the fixed beam 4 at first and move to the discharge mechanism of discharge gate 19 on, release it from discharge gate 19 by discharge mechanism again, so in cycles and over, the steel material heating is according to the production beat: ascending, moving forwards, descending, ascending … … descending and discharging, wherein the movable beam 5 continuously moves the steel materials from the feeding port 18 to the discharging port 19 in sequence, so that the steel materials sequentially pass through the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 in a stepping manner, and the heating of the steel materials is realized.

Further, two limiting plates 604 are installed at the interval from top to bottom in the length direction of furnace pit 1 in furnace pit 1, processing has the spacing hole corresponding with lifter 603 on the limiting plate 604, lifter 603 slidable mounting is in spacing downthehole, and it is spacing to lifter 603 through setting up spacing hole, makes the lifter 603 move more steadily.

Preferably, in order to enable the temperature control in each heating section to be more accurate, the number of the air adjusting valves 15 and the number of the exhaust cylinders 9 on the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 are sequentially reduced, the number of the burners 13 on the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 are sequentially increased, and the number of the temperature sensors 16 on the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 is the same.

Further, all be provided with heat transfer layer 17 on the inner wall of furnace body 7 and furnace roof 11, heat transfer layer 17 can realize the quick heat transfer of furnace body 7, form inclosed heat accumulation chamber between heat transfer layer 17 and furnace roof 11 and the furnace body 7, the interval is provided with heat accumulator 8 in the heat accumulation chamber, is provided with insulation material 3 between the adjacent heat accumulator 8, and heat accumulator 8 and insulation material 3 adopt prior art, and the insulation material 3 and the heat accumulator 8 of setting can reduce the heat in the furnace body 7 and scatter and disappear, reduce the heat in the furnace body 7 effectively and scatter and disappear, improve the utilization ratio of heat energy.

Furthermore, equidistant a plurality of spacing grooves that are provided with along fixed beam 4's length direction between two fixed beams 4, the spacing groove that sets up can be convenient for carry on spacingly to the steel material, prevents that the steel material from taking place the slope or the condition that drops at marching in-process, and vertical processing has the intercommunicating pore that runs through fixed beam 4 on the fixed beam 4 that every spacing groove corresponds, fixed beam 4's both sides processing has the communicating by pass hole with the intercommunicating pore, can be with the heat transfer to the steel material on fixed beam 4 in furnace body 7 through intercommunicating pore and the by pass hole that sets up on, avoid producing the phenomenon of black mark on the steel material.

Further, the exhaust duct 9 includes a duct 901, the duct 901 includes a cone section and a cylinder section which are fixedly connected, one end of the cone section is fixedly connected to the furnace top 11, the cone section is provided with an activated carbon layer 902, two filter plates 904 are installed at intervals in the cylinder section, an induced draft fan 903 is installed in the cylinder section between the two filter plates 904, an exhaust pipe 905 is installed at the end of the cylinder section, and the exhaust pipe 905 is connected with a waste heat utilization system. After the hot-blast cone section of following discharges, under the effect of draught fan 903, active carbon adsorption layer 902 and filter 904 can filter the solid particle in the hot-air, and the hot-air after the filtration is discharged from blast pipe 905.

The use method of the walking beam type continuous heating furnace comprises the following steps:

the first step is as follows: before heating, debugging a natural gas pipeline, an air pipeline and an air regulating mechanism, and then discharging redundant air and natural gas in the furnace body 7;

the second step is that: slightly opening a third adjusting proportional valve 106 and a fourth adjusting proportional valve 110, feeding air into the furnace body 7, slightly opening a first proportional adjusting valve 103 and a second proportional adjusting valve 108, feeding natural gas into the furnace body 7, then switching on a power supply for ignition, and after the natural gas is normally ignited, adjusting the first proportional adjusting valve 103, the second proportional adjusting valve 108, the third proportional adjusting valve 106 and the fourth proportional adjusting valve 110 according to the set air proportion and natural gas proportion so as to heat the heating temperature in the furnace body 7 according to a heating curve;

the third step: when a steel billet is heated, the steel billet needing to be heated and rolled is firstly conveyed to the fixed beam 4 in the furnace body 7 from the feeding port 18, the steel billet moves to the discharging port 19 of the furnace body 7 step by step along with the circular motion of the rising, horizontal advancing, descending and horizontal retreating of the movable beam 5, and the temperature of the preheating section 701, the heating section 702, the heating section 703 and the soaking section 704 is required to be adjusted in real time through the heating mechanism 10 and the air adjusting mechanism according to the measured value of the temperature sensor 16 in the moving process of the steel billet, so that the temperature of the preheating section 701 is 600-750 ℃, the temperature of the heating section 702 is 1000-1050 ℃, the temperature of the heating section 703 is 1200-1250 ℃, and the temperature of the soaking section 704 is 1250-1280 ℃.