Low-energy-consumption isothermal normalizing furnace for industrial large-scale application

Abstract

The invention discloses a low-energy-consumption isothermal normalizing furnace for industrial large-scale application, and belongs to the technical field of isothermal normalizing furnaces. The device comprises a furnace body, a track, two protection mechanisms and a heat preservation mechanism, a furnace door is installed on the top of the furnace body in a liftable mode, the track is arranged on the ground at the bottom of the furnace body, a through hole communicated with the interior of the track is formed in the track, a trolley is installed on the track in a rolling mode, and a top plate is fixed to one end of the bottom of the trolley; and the two guide rails are respectively fixed on the ground on two sides outside the furnace body. Through the design of the structures such as the fixing barrel, the T-shaped rod, the first spring, the steel wire rope and the guide piece, the trolley can be opened only after the furnace door rises to the highest position, collision between the trolley and the closed furnace door caused by misoperation is prevented, the furnace door and the trolley are protected against damage, meanwhile, the safety of operators is ensured, and the situation that the furnace door is closed when the trolley is not in place is avoided. Or accidents are caused when the trolley enters and exits when the furnace door is not opened.

Description

Technical Field

[0001] The present invention relates to the technical field of isothermal normalizing furnaces, in particular to a low-energy consumption isothermal normalizing furnace for industrial-scale applications. Background Art

[0002] In the field of industrial-scale metal heat treatment, isothermal normalizing process is the core link for optimizing the microstructure and performance of materials. The automation and safety of its equipment directly determine the production efficiency, equipment life and operation safety. In the process of metal heat treatment, normalizing furnaces are often used. Normalizing furnaces are medium-sized industrial kilns with long strips. The continuous normalizing furnaces for axles in the forging workshop of a vehicle factory originally used fuel-fired sub-high-speed burners, which were mainly used for heating and forging train axles for heat treatment. It is one of the main equipment in the forging workshop of a vehicle factory. There are many types of normalizing furnaces, among which the trolley-type isothermal normalizing furnace is also widely used in industrial production.

[0003] During the actual operation of a trolley-type isothermal normalizing furnace, the opening and closing of the furnace door is closely related to the entry and exit of the trolley. However, existing trolley-type isothermal normalizing furnaces have many deficiencies in the linkage control between the furnace door and the trolley. If the operator makes an error in operation, it is very easy to cause the furnace door to drop before the trolley has fully entered the furnace, or the trolley to be forced out before the furnace door is fully opened, resulting in a violent collision between the furnace door and the trolley. This will not only seriously damage equipment components, increase maintenance costs and downtime, but may also cause safety accidents and threaten the life of the operator. Therefore, to address the above situation, a low-energy isothermal normalizing furnace for industrial-scale application is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-energy isothermal normalizing furnace for industrial-scale application. Through the design of structures such as a fixed cylinder, a T-shaped rod, a first spring, a steel wire rope and a guide part, the trolley can only be opened after the furnace door is raised to the highest position, thereby preventing the trolley from colliding with the closed furnace door due to misoperation, protecting the furnace door and the trolley from damage, and ensuring the safety of the operator. It avoids accidents caused by the furnace door closing when the trolley is not in place, or the trolley entering and exiting when the furnace door is not opened. It solves the problem that if the operator makes a misoperation, it is very easy for the furnace door to drop when the trolley has not fully entered the furnace, or the trolley is forced out when the furnace door has not been fully opened, thereby causing a violent collision between the furnace door and the trolley, which will not only seriously damage equipment components, but also increase maintenance costs and downtime.

[0005] The present invention is achieved through the following technical solutions: The present invention is a low-energy isothermal normalizing furnace for industrial-scale applications, including a furnace body, a track, a protective mechanism and a heat-insulating mechanism. A furnace door is installed on the top of the furnace body in a liftable manner. The track is set on the ground at the bottom of the furnace body. A through-hole connecting to the inside of the track is opened on the track. A trolley is routably installed on the track. A top plate is fixed at one end of the bottom of the trolley, and one end of the top plate is triangular. There are two protective mechanisms, which are respectively fixed on the ground on both sides of the outside of the furnace body. One end of the protective mechanism is connected to the furnace door, and the other end extends into the through-hole.

[0006] There are two heat preservation mechanisms, which are respectively arranged on the ground on both sides of the outside of the furnace body. When the trolley moves out of the furnace cavity of the furnace body, the two heat preservation mechanisms cooperate to cover the bottom of the furnace body.

[0007] Furthermore, the protection mechanism includes a base plate, which is fixed on the ground near one side of the track, and a fixing cylinder is fixedly installed on the base plate.

[0008] Furthermore, the interior of the fixed tube has an inner cavity, one end of the fixed tube is provided with a through hole connected to the inner cavity, and the other end is provided with a wire threading hole connected to the inner cavity. A T-shaped rod is slidably fitted in the inner cavity, and the thin end of the T-shaped rod passes through the through hole and can extend into the track through the through hole. A first spring is fixed to the thick end of the T-shaped rod, and one end of the first spring is in contact with one side of the inner wall of the inner cavity. A steel wire rope is fixed on the T-shaped rod, and the steel wire rope passes through the wire threading hole to exit the inner cavity.

[0009] Furthermore, the protective mechanism includes a support plate, which is fixed on one side of the furnace door. Guide parts are respectively fixed on the support plate, furnace body and bottom plate. One end of the wire rope passes through the threading hole and contacts the guide parts on the bottom plate, furnace body and support plate in turn and is then fixed on the side wall of the furnace door.

[0010] Furthermore, the insulation mechanism includes a lifting assembly and a sealing plate. There are three lifting assemblies, which are respectively fixed on the ground on one side of the furnace body. The bottom of the sealing plate slides with the three lifting assemblies. A trapezoidal block is fixed at one end of the bottom of the sealing plate, and the inclined surface of the trapezoidal block faces the forward direction of the trolley.

[0011] Furthermore, the lifting assembly includes two support columns, which are fixedly connected by a guide rod. A guide seat is slidably connected to the support column, and the top of the guide seat is fixed to the bottom of the sealing plate.

[0012] Furthermore, the guide seat is in a T-shape, and a circular hole is provided on the guide seat, and the circular hole is slidably matched with the guide rod. Furthermore, a second spring is sleeved on the outer wall of the guide rod, and two ends of the second spring are fixedly connected to the guide seat and the support column respectively.

[0013] Furthermore, the guide member includes a "U"-shaped block, and guide wheels are rotatably connected to both side plates of the "U"-shaped block.

[0014] The present invention has the following beneficial effects: The present invention adopts the design of the fixed cylinder, T-shaped rod, first spring, steel wire rope and guide member. When the trolley is completely inside the furnace body and the furnace door is closed, the T-shaped rod penetrates into the track through the perforation, thereby limiting the rear wheel of the trolley. When the furnace door is opened, the trolley slides out from the interior of the furnace body, and the T-shaped rod can limit the front wheel of the trolley. In summary, when the furnace door is not raised to the highest position, the T-shaped rod cannot be fully extended from the inside of the track, thereby making it impossible for the trolley to move toward the furnace body on the track. Similarly, when the furnace door is not raised to the highest position, the T-shaped rod cannot be fully extended from the inside of the track, thereby making it impossible for the trolley to slide out from the interior of the furnace body. The trolley can be moved out only after the furnace door is raised to the highest position, thereby preventing the trolley from colliding with the closed furnace door due to misoperation, protecting the furnace door and trolley from damage, and ensuring the safety of the operator. It is avoided that the furnace door is closed when the trolley is not in place, or the trolley enters and exits when the furnace door is not opened, causing accidents.

[0015] The present invention adopts the structural design of the top plate, lifting assembly, sealing plate and trapezoidal block. When in use, after the trolley is moved out of the furnace body, the two sealing plates can be moved to the bottom of the furnace body for shielding, effectively blocking the channel for rapid heat loss from the bottom. Compared with the existing trolley-type normalizing furnace, the amount of heat loss is greatly reduced. When the next batch of workpieces is processed, the furnace body still retains a high temperature, and there is no need for long-term, high-energy consumption heating treatment as in the existing technology, thereby achieving the purpose of energy saving.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the normalizing furnace.

[0018] Figure 2 Schematic diagram of the overall structure of the protection mechanism.

[0019] Figure 3 for Figure 2 Schematic diagram of the locally enlarged structure at point A in the middle.

[0020] Figure 4 Schematic diagram of the assembly structure of the protective mechanism.

[0021] Figure 5 Schematic diagram of the internal structure of the fixed cylinder.

[0022] Figure 6 It is a schematic diagram of the overall structure of the insulation mechanism.

[0023] Figure 7 Schematic diagram of the assembly structure of the sealing plate.

[0024] In the figure: 1. furnace body; 2. furnace door; 3. track; 300. perforation; 4. trolley; 400. top plate; 5. protective mechanism; 6. bottom plate; 7. fixing cylinder; 700. inner cavity; 701. through hole; 702. threading hole; 8. T-shaped rod; 9. first spring; 10. wire rope; 11. support plate; 12. guide member; 13. insulation mechanism; 14. lifting assembly; 140. support column; 141. guide rod; 142. guide seat; 143. second spring; 15. sealing plate; 150. trapezoidal block. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-7 The present invention provides a technical solution: a low-energy isothermal normalizing furnace for industrial-scale application, comprising a furnace body 1, a track 3, a protective mechanism 5 and a heat preservation mechanism 13, and a furnace door 2 is installed on the top of the furnace body 1 in a liftable manner.

[0027] Among them, the resistance heating belt (made of nickel-chromium alloy) is evenly arranged on the four walls of the furnace cavity, the inner layer of the furnace body 1 uses high-temperature resistant ceramic fiber cotton, and the outer layer uses insulation bricks and weathering steel plates to reduce heat loss and reduce energy consumption. The lifting mechanism can use an electric hoist or a hydraulic system to achieve smooth and accurate lifting and lowering movements. In order to ensure the sealing of the furnace door when it is closed, a high-temperature resistant sealing rubber strip can be set on the edge of the furnace door to prevent heat leakage. These are all existing technologies familiar to people in this technical field and will not be elaborated here.

[0028] The track 3 is set on the ground at the bottom of the furnace body 1. It is the channel for the trolley 4 to enter and exit the furnace body 1. A through hole 300 is opened on the track 3 to connect to the inside of the track 3. The trolley 4 is rollingly installed on the track 3. A top plate 400 is fixed at one end of the bottom of the trolley 4. One end of the top plate 400 is triangular. This design is to enable effective cooperation with the protective mechanism 5 when the trolley enters and exits.

[0029] Among them, the trolley 4 can move along the track 3 under the drive of the driving device. The driving device is widely used in industrial trolley normalizing furnaces, including electric drive and hydraulic drive, which are technical means well known to people in this technical field and will not be elaborated here.

[0030] There are two protective mechanisms 5 , which are fixed on the ground on both sides of the outside of the furnace body 1 respectively. One end of the protective mechanism 5 is connected to the furnace door 2 , and the other end extends into the through hole 300 .

[0031] Among them, the protective mechanism 5 includes a base plate 6 and a support plate 11. The base plate 6 is fixed on the ground close to one side of the track 3. A fixed cylinder 7 is fixedly installed on the base plate 6. The interior of the fixed cylinder 7 has an inner cavity 700. One end of the fixed cylinder 7 is provided with a through hole 701 connected to the inner cavity 700, and the other end is provided with a threading hole 702 connected to the inner cavity 700. A T-shaped rod 8 is slidably fitted in the inner cavity 700. The thin end of the T-shaped rod 8 passes through the through hole 701 and can extend into the track 3 through the through hole 300. The thick end of the T-shaped rod 8 is fixed with a first spring 9. One end of the first spring 9 is in contact with one side of the inner wall of the inner cavity 700. A steel wire rope 10 is fixed on the T-shaped rod 8, and the steel wire rope 10 passes through the threading hole 702 and out of the inner cavity 700.

[0032] The support plate 11 is fixed on one side of the furnace door 2, and guide parts 12 are respectively fixed on the support plate 11, the furnace body 1 and the bottom plate 6. One end of the wire rope 10 passes through the threading hole 702 and contacts the guide parts 12 on the bottom plate 6, the furnace body 1 and the support plate 11 in turn, and then is fixed on the side wall of the furnace door 2.

[0033] The guide member 12 comprises a U-shaped block with guide wheels rotatably connected to the two side plates of the U-shaped block. The guide wheels 12 guide the direction of the wire rope 10 and reduce friction between the wire rope and other components. The guide wheels need to be made of wear-resistant material and rotate flexibly to ensure smooth operation of the wire rope.

[0034] The guide members 12 on the bottom plate 6 are fixed horizontally, and their "U"-shaped blocks are arranged horizontally; the guide members 12 on the furnace body 1 and the support plate 11 are fixed vertically, and their "U"-shaped blocks are arranged longitudinally.

[0035] In this embodiment, after the workpiece placed on the trolley 4 has completed the internal heat treatment of the furnace body 1, the furnace door 2 is raised. When the furnace door 2 moves upward to the maximum stroke, the furnace door 2 will drive the wire rope 10 to move upward. The wire rope 10 moves upward, and after being guided by the three guide members 12, it will pull the T-shaped rod 8 to slide inside the inner cavity 700 and squeeze the first spring 9, so that the T-shaped rod 8 extends from the inside of the track 3 through the through hole 300 and shrinks into the inner cavity 700, so that the T-shaped rod 8 no longer blocks the moving path of the trolley 4, and the trolley 4 can slide out stably from the inside of the furnace body 1. Similarly, only when the furnace door 2 is raised to the set highest position and the T-shaped rod 8 extends out of the track 3, can the trolley 4 travel through the track 3 into the furnace body 1. There are two heat preservation mechanisms 13, which are respectively arranged on the ground on both sides of the outside of the furnace body 1. When the trolley 4 moves out of the furnace cavity of the furnace body 1, the two heat preservation mechanisms 13 cooperate to cover the bottom of the furnace body 1 to reduce heat loss.

[0036] The heat preservation mechanism 13 includes a lifting assembly 14 and a sealing plate 15 . There are three lifting assemblies 14 , which are respectively fixed on the ground on one side of the furnace body 1 .

[0037] The bottom of the sealing plate 15 is slidably fitted with the three lifting assemblies 14. A trapezoidal block 150 is fixed to one end of the bottom of the sealing plate 15. The inclined surface of the trapezoidal block 150 faces the forward direction of the trolley 4, so that the trolley 4 can smoothly push the sealing plate 15 to slide when entering, thereby realizing automatic opening and closing.

[0038] The lifting assembly 14 includes a support column 140. There are two support columns 140. The two support columns 140 are fixedly connected by a guide rod 141. A guide seat 142 is slidably connected to the support column 140. The top of the guide seat 142 is fixed to the bottom of the sealing plate 15. The outer wall of the guide rod 141 is provided with a second spring 143. The two ends of the second spring 143 are respectively fixedly connected to the guide seat 142 and the support column 140. The function of the second spring 143 is to restore the sealing plate 15 to its initial position after the trolley leaves. The elastic coefficient of the second spring 143 needs to be selected according to the weight and movement requirements of the sealing plate 15. The sealing plate 15 has good thermal insulation performance. For example, an insulation cotton board or a ceramic fiber board can be used.

[0039] The guide seat 142 is in a T-shape and is provided with a circular hole that is slidably engaged with the guide rod 141 .

[0040] In this embodiment, after the trolley 4 slides out from the interior of the furnace body 1, the side walls of the trolley 4 no longer limit the side of the sealing plate 15. Under the reset of the second spring 143, the guide seat 142 slides on the guide rod 141, thereby causing the sealing plate 15 to slide. Through the cooperation of the two sealing plates 15, the bottom of the furnace body 1 is covered, and then by lowering the furnace door 2, the interior of the furnace body 1 can be insulated, greatly reducing heat loss. After the trolley 4 is filled with the workpiece to be processed again, after the furnace door 2 is raised, the trolley 4 moves toward the interior of the furnace body 1. At this time, the top plate 400 contacts the inclined surface of the trapezoidal block 150 first. Under the movement of the trolley 4, the top plate 400 pushes the trapezoidal block 150 and then drives the sealing plate 15 to slide on the guide rod 141, so that the trolley 4 can smoothly enter the furnace body 1.

[0041] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Low energy consumption isothermal normalizing furnace for industrial scale application, characterized by: include: A furnace body (1), wherein a furnace door (2) is mounted on the top of the furnace body (1) in a liftable manner; A track (3), the track (3) being arranged on the ground at the bottom of the furnace body (1), the track (3) being provided with a through hole (300) communicating with the interior of the track (3), a trolley (4) being rotatably mounted on the track (3), a top plate (400) being fixed at one end of the bottom of the trolley (4), and one end of the top plate (400) being triangular; Protective mechanisms (5), two of which are fixed to the ground on both sides of the outside of the furnace body (1), one end of the protective mechanism (5) is connected to the furnace door (2), and the other end extends into the through hole (300); There are two heat-insulating mechanisms (13), which are respectively arranged on the ground on both sides of the outside of the furnace body (1). When the trolley (4) moves out of the furnace cavity of the furnace body (1), the two heat-insulating mechanisms (13) cooperate to shield the bottom of the furnace body (1).

2. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 1, characterized in that: The protection mechanism (5) comprises a bottom plate (6), the bottom plate (6) being fixed on the ground near one side of the track (3), and a fixing cylinder (7) being fixedly mounted on the bottom plate (6).

3. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 2, characterized in that: The interior of the fixed cylinder (7) has an inner cavity (700), one end of the fixed cylinder (7) is provided with a through hole (701) connected to the inner cavity (700), and the other end is provided with a threading hole (702) connected to the inner cavity (700), a T-shaped rod (8) is slidably fitted in the inner cavity (700), the thin end of the T-shaped rod (8) passes through the through hole (701) and can extend into the track (3) through the through hole (300), the thick end of the T-shaped rod (8) is fixed with a first spring (9), one end of the first spring (9) is in contact with one side of the inner wall of the inner cavity (700), a steel wire rope (10) is fixed on the T-shaped rod (8), and the steel wire rope (10) passes through the threading hole (702) and out of the inner cavity (700).

4. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 3, characterized in that: The protective mechanism (5) includes a support plate (11), the support plate (11) is fixed to one side of the furnace door (2), and guide members (12) are fixed to the support plate (11), the furnace body (1) and the bottom plate (6), respectively. One end of the steel wire rope (10) passes through the threading hole (702) and contacts the guide members (12) on the bottom plate (6), the furnace body (1) and the support plate (11) in sequence, and is then fixed to the side wall of the furnace door (2).

5. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 1, characterized in that: The heat preservation mechanism (13) includes a lifting assembly (14), and there are three lifting assemblies (14), which are respectively fixed on the ground on one side of the furnace body (1); It also includes a sealing plate (15), the bottom of which is in sliding engagement with the three lifting assemblies (14), a trapezoidal block (150) being fixed to one end of the bottom of the sealing plate (15), and an inclined surface of the trapezoidal block (150) facing the forward direction of the trolley (4).

6. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 5, characterized in that: The lifting assembly (14) includes two support columns (140), and the two support columns (140) are fixedly connected via a guide rod (141). A guide seat (142) is slidably connected to the support column (140), and the top of the guide seat (142) is fixed to the bottom of the sealing plate (15).

7. The low-energy consumption isothermal normalizing furnace for industrial-scale application according to claim 6, characterized in that: The guide seat (142) is in a "T" shape, and a circular hole is provided on the guide seat (142), and the circular hole is in sliding engagement with the guide rod (141).

8. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 7, characterized in that: The outer wall of the guide rod (141) is sleeved with a second spring (143), and the two ends of the second spring (143) are fixedly connected to the guide seat (142) and the support column (140) respectively.

9. The low-energy isothermal normalizing furnace for industrial-scale application according to claim 4, characterized in that: The guide member (12) comprises a "U"-shaped block, and guide wheels are rotatably connected to two side plates of the "U"-shaped block.

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