Electricity and gas dual-purpose low-temperature preheating furnace
By designing a dual-purpose low-temperature preheating furnace with an automatic opening furnace door and a spiral heating wire for electric heating, and combining the combustion heating shell and exhaust gas preheating chamber for gas heating, the existing preheating furnace structure complex and energy are solved. The problem of ineffective utilization has achieved efficient and convenient preheating effect.
Patent Information
- Application Number
- CN202422772774.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-11-14
AI Technical Summary
The existing preheating furnace has a complex structure and cannot effectively utilize the waste heat gas during electrical heating. It is difficult to operate conveniently during gas heating, resulting in high energy consumption.
An electric and gas dual-purpose low-temperature preheating furnace is designed, which uses automatic opening furnace door and internal and external spiral heating wire for electrical heating, and gas heating is carried out through combustion heating shell and exhaust gas preheating chamber to realize heat recycling and multiple heat How to use it.
It realizes a low-temperature preheating furnace with simple structure and easy operation, and can perform electric and gas heating at the same time, improves energy utilization efficiency, and provides convenience for various usage methods.
Smart Images
Figure CN222352908U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of preheating furnaces, in particular to an electric and gas dual-purpose low-temperature preheating furnace. Background Art
[0002] In the industrial production of steel strip metal raw materials, large quantities of materials need to be heated, and heating furnaces are required for processing during heating. Preheating is required before heating. The existing preheating furnace has a complex structure and can only perform simple gas heating or electric heating. When electric heating is used, it only heats the cold air, and the gas with waste heat inside the furnace body is directly discharged into the air, so a large amount of electricity is consumed. When gas heating is used, the gas with waste heat inside the furnace body is difficult to utilize, which is inconvenient to use. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an electric and gas dual-purpose low-temperature preheating furnace with a simple structure and easy operation. It can not only perform electric heating but also gas heating. It has a variety of usage methods, provides convenience for people, and can effectively solve the problems in the background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric and gas dual-purpose low-temperature preheating furnace, comprising a preheating furnace body, the inner top surface of the preheating furnace body is provided with four hot air diffusion pipes, the lower ends of the hot air diffusion pipes are evenly provided with diffusion holes, one end of the preheating furnace body is provided with an automatic opening furnace door, the inner top surface of the preheating furnace body is provided with an electric heating shell, the inner part of the electric heating shell is evenly provided with heating elements, and the air inlet of the electric heating shell is connected to the air outlet at the lower end of one side of the preheating furnace body through the electric heating air inlet pipe, the outlet of the electric heating shell is connected to the air inlet of the exhaust fan, and the exhaust fan is connected to the exhaust fan. The outlet of the machine is connected with four hot air diffusion pipes through an electric heating outlet pipe, and valve two is respectively provided on the electric heating outlet pipe and the electric heating inlet pipe, and the inlet of the hot air diffusion pipe is connected with the outlet of the gas heating element through the combustion heating inlet pipe, and the outlet of the preheating furnace body is also connected with a smoke exhaust pipe, which is connected with the waste gas preheating chamber of the gas heating element, and the burner of the gas heating element is connected with the outlet of the second fan through a conduit, and the inlet chamber of the gas heating element is connected with the outlet of the third fan through a conduit, and valve one is respectively provided on the smoke exhaust pipe and the combustion heating inlet pipe.
[0005] Furthermore, the automatically opening furnace door includes a sliding furnace door, and one end of the preheating furnace body is provided with two upper and lower slides, and the preheating furnace body is slidably connected to the slides. The upper end of the preheating furnace body is provided with a hoisting part that drives the sliding furnace door to slide up and down along the slides. The sliding furnace door can be driven to slide up and down by the operation of the hoisting part, thereby opening or closing the sliding furnace door.
[0006] Furthermore, the heating element includes an electrical connection seat connected to the electric heating shell, and the lower end of the electrical connection is provided with an inner spiral heating wire and an outer spiral heating wire, the outer spiral heating wire is located on the outside of the inner spiral heating wire, and the inner spiral heating wire and the outer spiral heating wire are located at the lower end of the interior of the electric heating shell, the interior of the electric heating shell can be heated by the inner spiral heating wire and the outer spiral heating wire, thereby heating other parts passing through the interior of the electric heating shell.
[0007] Furthermore, the gas heating element includes a combustion heating shell, a gas heating chamber that passes through the combustion heating shell from left to right is provided in the middle of the combustion heating shell, a burner is connected to the right end of the combustion heating shell, and an air intake chamber and an exhaust gas preheating chamber are provided in the middle of the combustion heating shell, and the air intake chamber is evenly provided with through holes that are connected to the gas heating chamber, and the burner can be used to burn the sprayed gas in the gas heating chamber, and the gas inside the preheating furnace body enters the exhaust gas preheating chamber through the flue gas exhaust pipe, so as to preheat the burner, so as to recover the waste gas heat, and air can be drawn into the air intake chamber through the fan three, and the gas inside the air intake chamber enters the gas heating chamber, and the air inside the gas heating chamber is heated by the combustion of the gas sprayed from the burner, and the heated gas enters the hot air diffusion pipe through the combustion heating air intake pipe, and the gas inside the hot air diffusion pipe is scattered into the interior of the preheating furnace body, so as to preheat the workpiece inside the preheating furnace body.
[0008] Compared with the prior art, the utility model has the following beneficial effects: the sliding furnace door can be driven to slide up and down by the operation of the hanging part, so as to open or close the sliding furnace door, the interior of the electric heating shell can be heated by the inner spiral heating wire and the outer spiral heating wire, thereby heating other parts passing through the interior of the electric heating shell, the heated gas is extracted into the interior of the hot air dispersion pipe by the exhaust fan, the hot air is dispersed into the interior of the preheating furnace body through the hot air dispersion pipe, the gas inside the preheating furnace body re-enters the interior of the electric heating shell through the electric heating inlet pipe and is reheated, thereby completing the cycle heating, the jet gas inside the gas heating chamber can be burned by the burner, and the gas inside the preheating furnace body is passed through the The flue gas enters the exhaust gas preheating chamber through the flue gas exhaust pipe to preheat the burner, so as to recover the waste gas heat. The air can be drawn into the air inlet chamber through the fan three, and the gas in the air inlet chamber enters the gas heating chamber. The air in the gas heating chamber is heated by the combustion of the gas ejected from the burner. The heated gas enters the hot air diffusion pipe through the combustion heating air inlet pipe, and the gas in the hot air diffusion pipe is scattered into the preheating furnace body to preheat the workpiece inside the preheating furnace body. The electric and gas dual-purpose low-temperature preheating furnace has a simple structure and is easy to operate. It can be used not only for electric heating but also for gas heating. It has a variety of usage methods and provides convenience for people. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the structure of the utility model;
[0010] Figure 2 It is a schematic diagram of the side structure of the utility model;
[0011] Figure 3 This is an enlarged structural diagram of the utility model at A;
[0012] Figure 4 It is a schematic diagram of the enlarged structure of point B of the utility model.
[0013] In the figure: 1 preheating furnace body, 2 hot air diffusion pipe, 3 automatic opening furnace door, 31 sliding furnace door, 32 lifting parts, 4 exhaust fan, 5 heating element, 51 inner spiral heating wire, 52 outer spiral heating wire, 6 electric heating shell, 7 electric heating air outlet pipe, 8 gas heating element, 81 gas heating chamber, 82 combustion heating shell, 83 air intake chamber, 84 exhaust gas preheating chamber, 85 burner, 9 flue gas exhaust pipe, 10 fan two, 11 fan three, 12 valve one, 13 combustion heating air intake pipe, 14 electric heating air intake pipe, 15 valve two. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] See also Figure 1-4The utility model provides a technical solution: an electric and gas dual-purpose low-temperature preheating furnace, comprising a preheating furnace body 1, the inner top surface of the preheating furnace body 1 is provided with four hot air diffusion pipes 2, the lower ends of the hot air diffusion pipes 2 are evenly provided with diffusion holes, one end of the preheating furnace body 1 is provided with an automatically opening furnace door 3, the inner top surface of the preheating furnace body 1 is provided with an electric heating shell 6, the inside of the electric heating shell 6 is evenly provided with heating elements 5, and the air inlet of the electric heating shell 6 is connected with the air outlet at the lower end of one side of the preheating furnace body 1 through the electric heating inlet pipe 14, the outlet of the electric heating shell 6 is connected with the air inlet of the exhaust fan 4, the outlet of the exhaust fan 4 is connected with the four hot air diffusion pipes 2 through the electric heating outlet pipe 7, and the electric heating outlet pipe 7 and the electric heating inlet pipe 14 are respectively provided with valves 15, the hot air The inlet of the diffuser 2 is connected to the outlet of the gas heating element 8 through the combustion heating air intake pipe 13, and the outlet of the preheating furnace body 1 is also connected to the smoke exhaust pipe 9, which is connected to the exhaust gas preheating chamber 84 of the gas heating element 8. The burner 85 of the gas heating element 8 is connected to the outlet of the second fan 10 through a conduit, and the air intake chamber 83 of the gas heating element 8 is connected to the outlet of the third fan 11 through a conduit. The smoke exhaust pipe 9 and the combustion heating air intake pipe 13 are respectively provided with a valve 12. The automatic opening furnace door 3 includes a sliding furnace door 31, and one end of the preheating furnace body 1 is provided with two upper and lower slideways. The preheating furnace body 1 is slidably connected to the slideway. The upper end of the preheating furnace body 1 is provided with a hoisting member 32 for driving the sliding furnace door 31 to slide up and down along the slideway. The operation of the hoisting member 32 can bring The movable sliding furnace door 31 slides up and down to open or close the sliding furnace door 31. The heating element 5 includes an electrical connection seat connected to the electric heating shell 6. The lower end of the electrical connection is provided with an inner spiral heating wire 51 and an outer spiral heating wire 52. The outer spiral heating wire 52 is located on the outside of the inner spiral heating wire 51, and the inner spiral heating wire 51 and the outer spiral heating wire 52 are located at the lower end of the inner part of the electric heating shell 6. The inner spiral heating wire 51 and the outer spiral heating wire 52 can heat the inside of the electric heating shell 6, thereby heating other parts passing through the inside of the electric heating shell 6. The gas heating element 8 includes a combustion heating shell 82. The middle of the combustion heating shell 82 is provided with a gas heating chamber 81 that runs through from left to right. The right end of the combustion heating shell 82 is connected with a combustion heating chamber 81. The burner 85 is provided, and an air inlet chamber 83 and an exhaust gas preheating chamber 84 are provided in the middle of the combustion and heating shell 82. The interior of the air inlet chamber 83 is evenly provided with through holes communicating with the gas heating chamber 81. The gas sprayed in the gas heating chamber 81 can be burned through the burner 85, and the gas inside the preheating furnace body 1 enters the exhaust gas preheating chamber 84 through the flue gas exhaust pipe 9, so as to preheat the burner 85, so as to recover the exhaust gas heat. The air can be drawn into the air inlet chamber 83 through the fan 11, and the gas inside the air inlet chamber 83 enters the gas heating chamber 81. The air inside the gas heating chamber 81 is heated by the combustion of the gas sprayed from the burner 85, and the heated gas enters the hot air diffusion pipe 2 through the combustion and heating air inlet pipe 13.The gas inside the hot air diffusion pipe 2 is scattered into the interior of the preheating furnace body 1, so as to preheat the workpiece inside the preheating furnace body 1. The electric and gas dual-purpose low-temperature preheating furnace has a simple structure and is easy to operate. It can be heated by electricity as well as gas, and has a variety of usage methods, providing convenience for people.
[0016] When in use: the operation of the hanging part 32 can drive the sliding furnace door 31 to slide up and down, so as to open or close the sliding furnace door 31. When electrically heated, first open the valve 2 15, and then close the valve 12. The interior of the electric heating shell 6 can be heated by the inner spiral heating wire 51 and the outer spiral heating wire 52, thereby heating other parts passing through the electric heating shell 6. The heated gas is extracted into the interior of the hot air diffusion pipe 2 through the exhaust fan 4, and the hot air is diffused into the interior of the preheating furnace body 1 through the hot air diffusion pipe 2. The gas inside the preheating furnace body 1 re-enters the interior of the electric heating shell 6 through the electric heating inlet pipe 14 and is reheated, thereby completing the cycle heating. When heated by gas, first close the valve 2 15. , and then open valve 12, and the gas sprayed from the burner 85 can be burned in the gas heating chamber 81, and the gas inside the preheating furnace body 1 enters the exhaust gas preheating chamber 84 through the flue gas exhaust pipe 9, so as to preheat the burner 85, so as to recover the heat of the exhaust gas, and the air can be drawn into the air inlet chamber 83 through the fan three 11, and the gas inside the air inlet chamber 83 enters the gas heating chamber 81, and the gas sprayed from the burner 85 burns to heat the air inside the gas heating chamber 81, and the heated gas enters the hot air diffusion pipe 2 through the combustion heating air inlet pipe 13, and the gas inside the hot air diffusion pipe 2 is scattered into the preheating furnace body 1, so as to preheat the workpiece inside the preheating furnace body 1.
[0017] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.
Claims
1. An electric and gas dual-purpose low-temperature preheating furnace, comprising a preheating furnace body (1), characterized in that: The inner top surface of the preheating furnace body (1) is provided with four hot air diffusion pipes (2), and the lower ends of the hot air diffusion pipes (2) are evenly provided with diffusion holes. One end of the preheating furnace body (1) is provided with an automatically opening furnace door (3). The inner top surface of the preheating furnace body (1) is provided with an electric heating shell (6), and the interior of the electric heating shell (6) is evenly provided with heating elements (5), and the air inlet of the electric heating shell (6) is connected to the air outlet at the lower end of one side of the preheating furnace body (1) through the electric heating air inlet pipe (14), and the outlet of the electric heating shell (6) is connected to the air inlet of the exhaust fan (4), and the outlet of the exhaust fan (4) is connected to the four hot air diffusion pipes (2) through the electric heating air outlet pipe (7), and the electric heating air outlet pipe ( A second valve (15) is provided on the hot air diffusion pipe (2) and the electric heating air inlet pipe (14), respectively; the inlet of the hot air diffusion pipe (2) is connected to the outlet of the gas heating element (8) through the combustion heating air inlet pipe (13); the outlet of the preheating furnace body (1) is also connected to a smoke exhaust pipe (9); the smoke exhaust pipe (9) is communicated with the waste gas preheating chamber (84) of the gas heating element (8); the burner (85) of the gas heating element (8) is connected to the outlet of the second fan (10) through a conduit; the air inlet chamber (83) of the gas heating element (8) is communicated with the outlet of the third fan (11) through a conduit; and a first valve (12) is provided on the smoke exhaust pipe (9) and the combustion heating air inlet pipe (13), respectively.
2. The electric and gas dual-purpose low-temperature preheating furnace according to claim 1, characterized in that: The automatically opening furnace door (3) comprises a sliding furnace door (31), one end of the preheating furnace body (1) is provided with two upper and lower slideways, the preheating furnace body (1) is slidably connected to the slideways, and the upper end of the preheating furnace body (1) is provided with a hanging member (32) for driving the sliding furnace door (31) to slide up and down along the slideways.
3. The electric and gas dual-purpose low-temperature preheating furnace according to claim 1 is characterized in that: The heating element (5) comprises an electrical connection seat connected to the electrical heating shell (6); an inner spiral heating wire (51) and an outer spiral heating wire (52) are provided at the lower end of the electrical connection; the outer spiral heating wire (52) is located outside the inner spiral heating wire (51); and the inner spiral heating wire (51) and the outer spiral heating wire (52) are located at the lower end inside the electrical heating shell (6).
4. The electric and gas dual-purpose low-temperature preheating furnace according to claim 1 is characterized in that: The gas heating element (8) comprises a combustion heating shell (82), a gas heating chamber (81) extending from left to right is provided in the middle of the combustion heating shell (82), a burner (85) is connected to the right end of the combustion heating shell (82), and an air intake chamber (83) and an exhaust gas preheating chamber (84) are provided in the middle of the combustion heating shell (82), and through holes communicating with the gas heating chamber (81) are evenly provided in the air intake chamber (83).