Push type heating furnace

Abstract

The utility model relates to the technical field of heat treatment, in particular to a push type heating furnace. The heating furnace comprises a furnace body, a furnace lining, furnace doors and burners, the furnace lining and the burners are arranged on the inner wall of the furnace body, the furnace doors are arranged at a feeding port and a discharging port in the two sides of the furnace body, the heating furnace further comprises a material pad, a material pushing machine, a discharging machine and a conveying device, and the material pushing machine and the discharging machine are arranged on the outer sides of the furnace doors of the feeding port and the discharging port of the furnace body respectively. A conveying device is arranged between the feeding port and the discharging port in the furnace body, and the material pad slides along the conveying device. The product is compact in structure and small in occupied area, a hydraulic pusher is adopted for feeding, a motor is adopted for driving the discharging machine to ascend and descend, and continuous production and periodic production can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment, in particular to a pusher-type heating furnace. Background Art

[0002] The existing heating furnace has a simple structure and mainly has the following defects:

[0003] 1. It occupies a large area and has a low degree of automation;

[0004] 2. For feeding and discharging, it is very inconvenient for workers to operate;

[0005] 3. It lacks a heat recovery device and has high energy consumption. Summary of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] In view of the deficiencies of the prior art, the utility model provides a pusher-type heating furnace, which is characterized by continuous production or periodic production and high production efficiency.

[0008] (2) Technical Solutions

[0009] A pusher-type heating furnace includes a furnace body, a furnace lining, a furnace door and burners. The inner wall of the furnace body is provided with a furnace lining and burners, and furnace doors are provided at the feeding port and discharging port on both sides of the furnace body. Further, it also includes a material pad, a pusher, a discharger and a conveying device. The pusher and the discharger are respectively arranged outside the furnace doors at the feeding port and discharging port of the furnace body, a conveying device is arranged between the feeding port and discharging port inside the furnace body, and the material pad slides along the conveying device.

[0010] Preferably, a smoke exhaust device and a combustion air blower are provided at the top of the furnace body. The smoke exhaust device includes a smoke exhaust pipe and a pneumatic butterfly valve and a combustion air preheater installed thereon. The combustion air preheater is connected to the combustion air blower.

[0011] Preferably, the conveying device includes in-furnace rollers, in-furnace tracks, in-furnace sleepers and pin shafts. The in-furnace tracks are fixedly installed on the in-furnace sleepers through pin shafts, the in-furnace rollers are rotatably connected to the in-furnace tracks, and the material pad slides through the in-furnace rollers.

[0012] Preferably, the discharger includes a frame and a lifting device and a traveling device installed thereon.

[0013] Preferably, a material pad chute is further provided on one side of the discharging port of the furnace body.

[0014] Preferably, the furnace body is a box-shaped frame structure composed of steel structures.

[0015] Preferably, the furnace door is configured with a lifting mechanism.

[0016] Preferably, the frame is a gantry frame welded by steel sections.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present utility model provides a novel pusher-type heating furnace, which has the following advantages:

[0019] 1. It has a compact structure and small floor area. The feeding is carried out by a hydraulic pusher, and the discharging machine is driven by a motor to lift and fork the ingot in the furnace onto the roller table outside the furnace.

[0020] 2. The heating furnace can be continuously produced or produced in a periodic manner. When the production capacity is large, the continuous production mode can be adopted, and the overall operation process is electrically controlled.

[0021] 3. The bottom track adopts a roller-type guide rail, which reduces friction, improves the durability of the material pad, and saves costs.

[0022] 4. The furnace is provided with a waste heat recovery system. During production, the high-temperature flue gas in the furnace chamber preheats the ingot just entering the furnace when discharging, saving the energy consumption of the equipment. A combustion air preheater is arranged at the flue gas outlet to reduce the flue gas discharge temperature of the equipment, making the energy consumption of the equipment about 30% lower than that of similar products.

[0023] 5. It has a high degree of electrical control. The operator only needs to place the material pad on the track and then hoist the ingot. The discharging action can also be electrically controlled. Description of the Drawings

[0024] Figure 1 is the main sectional view of the product;

[0025] Figure 2 is the side sectional view of the product;

[0026] Figure 3 is the top sectional view of the product.

[0027] Reference numerals: 1, furnace body; 2, furnace lining; 3, furnace door; 31, lifting mechanism; 4, pusher; 5, frame; 6, discharging machine; 61, lifting device; 62, traveling device; 7, exhaust gas pneumatic butterfly valve; 8, exhaust gas pipeline; 9, combustion air preheater; 10, burner; 11, material pad; 12, in-furnace roller; 13, in-furnace track; 14, in-furnace sleeper; 15, pin shaft; 16, material pad chute; 17, combustion air blower; 18, control cabinet; 19, ingot. Detailed Embodiment

[0028] The present utility model will be further described in detail below in conjunction with the accompanying drawings, where the same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "up", "down", "bottom surface" and "top surface" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Design concept: Design a new type of pusher heating furnace that can be continuously produced or produced periodically with high production efficiency.

[0031] Embodiment:

[0032] As Figures 1 - 3 shown, the technical solution provided by the present utility model is a pusher heating furnace, which includes a furnace body 1, a furnace lining 2, a furnace door 3 and a burner 10. The inner wall of the furnace body 1 is provided with a furnace lining 2 and a burner 10. The burner 10 is the heat source, that is, a natural gas burner. After mixing natural gas with hot air, it burns fully to generate heat and provides the required heat source for the heating furnace. Furnace doors 3 are provided at the feeding port and the discharging port on both sides of the furnace body 1. The furnace door 3 is configured with a lifting mechanism 31. Further, it also includes a material pad 11, a pusher 4, a discharging machine 6 and a conveying device. The pusher 4 and the discharging machine 6 are respectively arranged outside the furnace doors 3 at the feeding port and the discharging port of the furnace body 1. A conveying device is arranged between the feeding port and the discharging port in the furnace body 1, and the material pad 11 slides along the conveying device.

[0033] The top of the furnace body 1 in this embodiment is provided with a smoke exhaust device and a combustion-supporting blower 17. The smoke exhaust device includes a smoke exhaust pipe 8 and a pneumatic butterfly valve 7 and a combustion-supporting air preheater 9 installed thereon. The combustion-supporting air preheater 9 is connected to the combustion-supporting blower 17. Among them, the pneumatic butterfly valve 7 for the exhaust gas is used to adjust and control the amount of flue gas discharged in the furnace, so as to achieve the high and low pressure in the furnace; the smoke exhaust pipe 8 is used to lead the discharged flue gas to the outside of the workshop for discharge, and heat insulation treatment is carried out on the outside; the combustion-supporting air preheater 9 is used to preheat the cold air from the combustion-supporting blower 17 with the waste heat of the flue gas discharged in the furnace, make full use of the heat that was originally directly discharged, reduce energy consumption and achieve an energy-saving effect; the combustion-supporting blower 17 provides the required high-pressure air for the natural gas burner 10. The high-pressure cold air generated by it first enters the combustion-supporting air preheater 9 for preheating, becomes high-pressure hot air and then enters the natural gas burner 10 to provide oxygen for combustion.

[0034] The transfer device of this embodiment includes in-furnace rollers 12, in-furnace tracks 13, in-furnace sleepers 14 and pin shafts 15. The in-furnace tracks 13 are fixedly installed on the in-furnace sleepers 14 through the pin shafts 15. The in-furnace rollers 12 are rotatably connected to the in-furnace tracks 13, and the material pad 11 slides through the in-furnace rollers 12. More specifically, the in-furnace rollers 12 are cast from heat-resistant alloy steel with high temperature resistance and wear resistance, and are installed in the U-shaped groove of the in-furnace tracks 13; the in-furnace tracks 13 are cast from heat-resistant alloy steel with high temperature resistance and wear resistance, and are installed on the in-furnace sleepers 14 for installing and fixing the rollers; the in-furnace sleepers 14 are cast from heat-resistant alloy steel with high temperature resistance and wear resistance, and are installed on the furnace bottom bricks for installing and fixing the in-furnace tracks 13; the pin shafts 15 are heat-resistant stainless steel round bars for fixing the tracks to the sleepers.

[0035] The discharging machine 6 of this embodiment includes a frame 5 and a lifting device 61 and a traveling device 62 installed thereon. The frame 5 is a gantry frame welded by section steel.

[0036] On one side of the discharging port of the furnace body 1 of this embodiment, there is also provided a material pad chute 16, which is a slope welded by section steel and steel plates, for receiving the dropped material pad 11 after discharging and allowing it to slide to the side for easy reuse by workers.

[0037] More specific implementation scheme:

[0038] The furnace shell steel structure of the furnace body 1 of this embodiment is a box-shaped frame structure composed of a furnace top steel structure, side wall steel structures, end wall steel structures and a furnace bottom steel structure, used to protect the refractory material of the furnace lining 2, install burners 10, furnace doors 3 and various furnace body 1 accessories. The furnace body 1 steel structure is mainly composed of section steel and steel plates.

[0039] The lower part of the furnace lining 2 of this embodiment is composed of a composite masonry of heavy-duty refractory bricks, lightweight high-strength insulating bricks, refractory fiber blankets, etc. The furnace walls and the furnace top are lined with refractory fiber modules to improve the integrity, tightness and heat insulation of the furnace, so as to obtain the minimum heat dissipation loss and the longest service life of the furnace lining.

[0040] The heating furnace of this embodiment is provided with a charging furnace door, a discharging furnace door and their supporting lifting mechanisms 31. The charging furnace door and the discharging furnace door are lined with lightweight refractory materials inside a steel structure. The discharging furnace door adopts a water-cooled door frame. The furnace door 3 ensures tight closure (no fire leakage). The opening and closing of the furnace door 3 are driven by hydraulic pressure, and the opening and closing of the furnace door 3 can be detected and controlled by a stroke controller.

[0041] The pusher 4 of this embodiment is composed of a pusher oil cylinder, a frame and a hydraulic pusher mechanism, etc. The pusher stroke can be controlled by a limit switch, and the pusher speed is adjustable within a certain range.

[0042] The ingot discharging machine 6 of this embodiment adopts a gantry structure, and the translation and lifting are driven by motors. Its main function is to fork out the ingot 19 in the furnace, then walk to the center position of the rolling mill roller table, and place the ingot 19 on the rolling mill roller table. The discharging machine 6 mainly consists of a lifting device 61 and a traveling device 62:

[0043] The lifting device 61 uses a motor installed on the top as the power, and drives the material fork to lift through a sprocket and a roller chain.

[0044] The traveling device 62 mainly consists of a speed reducer, traveling wheels, sprockets and chains, and axles. The traveling motor adopts variable frequency speed regulation, running at a slow speed during startup and stop, and at a fast speed in the middle position, reducing the time for the ingot 19 to leave the furnace.

[0045] The material pad 11 of this embodiment is formed by casting heat-resistant alloy steel and is machined by a machine tool to ensure the smoothness of the contact surface, so that it will not arch when pushed by a hydraulic press. The material pad 11 is placed on the rollers on the track. The ingot 19 is hoisted onto the material pad 11. When pushing, the ingot 19 contacts the material pad 11, and the surface of the ingot 19 will not be worn when it is displaced in the furnace.

[0046] This embodiment is equipped with a control cabinet 18, which includes an electrical circuit, a PLC, an operation screen, etc., and is used for the operation of the heating furnace and the setting of some parameters. This embodiment does not involve the improvement of the control cabinet 18 itself, so it will not be described in detail.

[0047] Working principle and process:

[0048] The heating furnace of this product has a pusher structure. The operator places the material pad 11 on the track of the furnace front feeding table, and uses a crane to lift the copper ingot (ingot 19) and place it on the material pad 11 of the hydraulic pusher 4. Before heating, the front furnace door 3 is opened, and the pusher 4 pushes the material into the heating furnace. When discharging, there is a gantry discharging machine 6, which transfers the ingot 19 that has been heated in the furnace to the rolling mill roller table according to the discharging situation.

[0049] The pusher-type heating furnace is provided with two production modes, namely, a continuous production mode and a periodic production mode, which solves the problem of traditional furnace types that either have a small output and use a periodic furnace, or have a large output and use a continuous furnace. It is a multi-purpose furnace type specially developed for users.

[0050] During continuous production, the material is discharged first and then fed; first, the furnace temperature of the heating furnace is raised to the process-set temperature, then the front furnace door 3 is opened, the discharging machine 6 forks out the last ingot blank and places it on the rolling mill roller table. At the same time, the material pad 11 falls into one side of the heating furnace through the material pad chute 16 under the discharging port, and the operator clamps the material pad 11 to the feeding table position. After the feeding table is prepared, the ingot 19 is pushed into the heating furnace for preheating, heating up and heat preservation.

[0051] In the periodic production mode, first fill the furnace chamber with ingots 19, close the furnace door 3, heat up and keep warm. After the heat preservation timing is up, discharge the materials first, and then push the ingots 19 in the furnace out of the furnace in sequence by pushing the material pad 11 with the hydraulic pusher 4.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pusher type heating furnace, comprising a furnace body, a furnace lining, a furnace door and a burner, wherein the inner wall of the furnace body is provided with a furnace lining and a burner, and furnace doors are provided at the feed inlet and the discharge outlet on both sides of the furnace body, characterized in that: It also includes a material pad, a pusher, a discharger and a conveying device. The pusher and the discharger are respectively arranged on the outside of the furnace door of the feed port and the discharge port of the furnace body. A conveying device is arranged between the feed port and the discharge port in the furnace body, and the material pad slides along the conveying device.

2. A pusher type heating furnace according to claim 1, characterized in that: A smoke exhaust device and a combustion-supporting fan are arranged on the top of the furnace body. The smoke exhaust device comprises a smoke exhaust gas duct and a smoke exhaust pneumatic butterfly valve and a combustion-supporting air preheater installed thereon. The combustion-supporting air preheater is connected to the combustion-supporting fan.

3. A pusher type heating furnace according to claim 1, characterized in that: The conveying device comprises a furnace roller, a furnace track, a furnace sleeper and a pin shaft. The furnace track is fixedly installed on the furnace sleeper through the pin shaft, the furnace roller is rotatably connected to the furnace track, and the material pad slides through the furnace roller.

4. A pusher type heating furnace according to claim 1, characterized in that: The discharging machine comprises a frame and a lifting device and a walking device installed thereon.

5. The pusher type heating furnace according to claim 1, characterized in that: A material pad chute is also provided on one side of the furnace body discharge port.

6. A pusher type heating furnace according to claim 1, characterized in that: The furnace body is a box-shaped frame structure composed of steel structures.

7. The pusher type heating furnace according to claim 1, characterized in that: The furnace door is equipped with a lifting mechanism.

8. A pusher type heating furnace according to claim 4, characterized in that: The frame is a gantry frame welded from section steel.

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