Furnace door lifting mechanism of roasting furnace

Abstract

The utility model discloses a lifting mechanism for a furnace door of a roasting furnace, and belongs to the technical field of roasting furnace equipment. Comprising a furnace door, a furnace door lifting assembly, a supporting assembly, a limiting structure and a temporary connecting structure. A furnace door lifting assembly is arranged on the supporting assembly; the furnace door is suspended below the furnace door lifting assembly; the supporting assembly is used for supporting the furnace door lifting assembly and the furnace door. The furnace door lifting assembly is used for controlling the furnace door to ascend or descend; a limiting structure is arranged between the supporting assembly and the furnace door. The limiting structure is used for limiting the furnace door to only ascend or descend in the vertical direction; after the furnace door seals the furnace mouth of the roasting furnace, a temporary connecting structure is arranged between the furnace mouth of the roasting furnace and the furnace door; the temporary connecting structure is used for temporarily integrating the furnace door and the furnace opening of the roasting furnace.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the roasting furnace equipment technical field, concretely relates to a roasting furnace door lifting mechanism. BACKGROUND

[0002] The roasting furnace is an important heat treatment equipment, is widely used in chemical industry, metallurgical field and other need high temperature heat treatment scene;The roasting furnace can complete certain chemical reaction under the equipment below the material melting temperature;Material is sent into the roasting furnace from the furnace mouth of roasting furnace, and electric heating rod or electric heating wire is arranged on the inner wall of roasting furnace, provides the high temperature environment required by roasting;In order to ensure that a closed space is formed in the roasting process in the roasting furnace, avoid the influence that air may have on the chemical reaction of roasting material after entering, also in order to guarantee the stability of the roasting temperature in the roasting furnace;The furnace door is arranged at the furnace mouth of roasting furnace, is used to seal the space in the furnace during the roasting process;The furnace door usually adopts the installation structure of lifting suspension, the furnace door can be sealed after being lowered the furnace mouth of roasting furnace;Conversely, the furnace mouth of roasting furnace is opened after the furnace door is lifted.

[0003] At present, the tightness of the furnace door to the furnace mouth of roasting furnace completely depends on the furnace door as far as possible to fit the furnace mouth of roasting furnace, and then the furnace door vertically drops in the process of suspension lifting under the action of gravity, and the furnace mouth of roasting furnace is sealed;But for the furnace door, the state of sealing the roasting furnace is equivalent to two independent components with the furnace door;If the material in the furnace generates gas during the roasting process, the positive pressure is formed in the furnace;If the furnace door and the furnace mouth of roasting furnace are not sealed tightly or the weight of the furnace door is not enough to resist the displacement of the positive pressure to the furnace door, then the furnace door may appear the phenomenon of cannon fire. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of roasting furnace door lifting mechanism, the limiting structure of furnace door is arranged on the lifting mechanism, so that the moving track of furnace door can only vertically lift, cannot swing front and back and left and right;Ensure that the relative position between furnace door and the furnace mouth of roasting furnace does not change, after the position of furnace door is determined, ensure that the gap between furnace door and the furnace mouth of roasting furnace does not increase due to the swing of furnace door;Also make furnace door more stable when lifting;In addition, temporary connecting structure can be formed between furnace door and the furnace mouth of roasting furnace after furnace door seals roasting furnace, so that furnace door and roasting furnace form temporary overall structure;Avoid that the positive pressure in the furnace causes the displacement of furnace door, possibly lead to the gap between furnace door and furnace mouth increase, cause the phenomenon of running fire.

[0005] In order to achieve the above technical purpose, the utility model is realized by the following technical scheme:

[0006] A kind of roasting furnace door lifting mechanism, comprising: furnace door, furnace door lifting component, support component, limiting structure and temporary connecting structure;

[0007] The support assembly is provided with a furnace door lifting assembly;

[0008] The furnace door is suspended below the furnace door lifting assembly; the support assembly is used for supporting the furnace door lifting assembly and the furnace door;

[0009] The furnace door lifting assembly is used for controlling the rising or falling of the furnace door;

[0010] The support assembly and the furnace door are provided with a limiting structure; the limiting structure is used for limiting the activity track of the furnace door to only rise or fall in the vertical direction;

[0011] After the furnace door seals the roasting furnace mouth, a temporary connecting structure is arranged between the roasting furnace mouth and the furnace door; the temporary connecting structure is used for temporarily forming an integral body of the furnace door and the roasting furnace mouth.

[0012] Preferably, the support assembly comprises a door support frame and a cross beam frame;

[0013] The door support frame is vertically provided with two; the two door support frames are symmetrically arranged left and right;

[0014] The upper end of the two door support frames is provided with a cross beam frame;

[0015] The cross beam frame is provided with a furnace door lifting assembly; the lower end of the furnace door lifting assembly is provided with a furnace door.

[0016] Preferably, the furnace door lifting assembly comprises a suspension cable, a roller and a winch assembly;

[0017] The roller is arranged above the cross beam frame;

[0018] A roller is arranged opposite to each side of the furnace door; the most side of the cross beam frame is provided with a roller;

[0019] The suspension cable is provided with two; the two suspension cables are arranged on the roller;

[0020] The first end of the two suspension cables is connected to the left and right sides above the furnace door respectively after passing through the roller;

[0021] The second end of the two suspension cables is integrally connected; after passing through the roller, the second end is vertically downward on the outside of the support assembly;

[0022] The second end of the two suspension cables is provided with a winch assembly; the winch assembly is used for winding and releasing, pulling the second end of the suspension cable downward to make the furnace door rise; or controlling the second end of the suspension cable to move upward to make the furnace door fall.

[0023] Preferably, the winch assembly comprises a winch, a winch cable and a suspension hook;

[0024] The winch steel cable is coiled on the winch; the winch can be rotated forward or backward, and the winch steel cable can be reeled or unwound;

[0025] The upper end of the winch steel cable is connected to the second end of the suspension cable through the suspension hook.

[0026] Preferably, a limiting structure is arranged between the inner sides of the two door brace frames and the two sides of the furnace door of the support assembly;

[0027] The limiting structure comprises a pulley and an embedded sliding groove;

[0028] The inner sides of the two door brace frames are each provided with the embedded sliding groove;

[0029] The two sides of the furnace door are each provided with an equal number of pulleys;

[0030] The pulleys are movably embedded in the embedded sliding grooves;

[0031] The pulleys can only move vertically up or down relative to the embedded sliding grooves and cannot be separated from the embedded sliding grooves.

[0032] Preferably, the embedded sliding groove is provided as an inner groove structure;

[0033] A part of the pulley is embedded in the inner groove, and the circumferential wall of the pulley always adheres to the groove bottom wall of the inner groove;

[0034] The two side walls of the pulley always adhere to the two side walls of the inner groove.

[0035] Preferably, the temporary connecting structure comprises an embedded limiting groove, a limiting groove embedded flange, and a locking mechanism;

[0036] The embedded limiting groove is arranged on the two sides of the roasting furnace mouth;

[0037] The opposite sides of the furnace door and the furnace mouth are each provided with a limiting groove embedded flange near the left and right sides of the furnace door;

[0038] The inner wall of the embedded limiting groove is provided with a locking mechanism; after the furnace door is lowered to seal the furnace mouth, the limiting groove embedded flange is located in the embedded limiting groove, and the locking mechanism is used to lock the embedded limiting groove and the limiting groove embedded flange with each other, so that the furnace door cannot swing and move forward and backward relative to the furnace mouth under the action of external force.

[0039] Preferably, the locking mechanism comprises an electromagnetic block and a limiting groove;

[0040] The two sides of each limiting groove embedded flange are each provided with a limiting groove;

[0041] The two sides of each embedded limiting groove are provided with an electromagnetic block insertion groove;

[0042] An electromagnetic block is movably arranged in the electromagnetic block insertion groove;

[0043] The electromagnetic block is connected to the electromechanical control assembly.

[0044] Preferably, a speed-difference anti-falling device is arranged between the cross beam frame of the support assembly and the top of the furnace door.

[0045] The upper end of the speed-difference anti-falling device is arranged below the cross beam frame, and the lower end of the speed-difference anti-falling device is arranged above the furnace door.

[0046] The beneficial effects of the present application are as follows:

[0047] The roasting furnace door lifting mechanism provided by the present application is arranged between the door support frame of the support assembly and the two sides of the furnace door, and a pulley and an embedded sliding groove are arranged in cooperation, so that the moving track of the furnace door can only be vertically raised or lowered, the stability of the furnace door during the process of being suspended, raised or lowered is ensured, and the furnace door will not shake, and the relative position between the furnace door and the furnace mouth after the furnace door is lowered is always kept unchanged, so that the sealing performance of the furnace door on the furnace mouth is ensured.

[0048] The embedded limiting groove and the limiting groove embedded flange are arranged between the furnace door and the furnace mouth, and a limiting groove is arranged on the two side walls of the limiting groove embedded flange; an electromagnetic block is movably arranged in the two side walls of the embedded limiting groove; after the furnace door is sealed to block the furnace mouth, the limiting groove embedded flange is located in the embedded limiting groove, the electromagnetic block is moved out of a part under the magnetic attraction of the energized electromagnetic block, and the moved-out part is clamped into the limiting groove; in this way, the furnace door and the furnace mouth are temporarily connected as a whole when the furnace door is sealed, the positive pressure in the furnace body is prevented from generating a pushing force on the furnace door, the displacement of the furnace door caused by the insufficient weight of the furnace door is avoided, and the gap between the furnace door and the furnace mouth is prevented from appearing to cause the phenomenon of fire running.

[0049] The speed-difference anti-falling device is arranged between the cross beam frame and the top of the furnace door, and once the furnace door autonomously descends and the acceleration suddenly increases, the speed-difference anti-falling device will be locked to avoid damage caused by the autonomous falling of the furnace door. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0051] Figure 1 It is the overall structure schematic diagram of the present application;

[0052] Figure 2 This is a structural schematic diagram of the roller, suspension cable, suspension hook, and winch cable of this utility model;

[0053] Figure 3 This is a schematic diagram of the overall front structure of this utility model;

[0054] Figure 4 This is a schematic diagram of the embedded limiting groove structure opened on both sides of the furnace opening of the roasting furnace of this utility model.

[0055] Figure 5 This is a schematic diagram of the furnace door of this utility model and the limiting groove embedded flange structure on both sides of the furnace door;

[0056] Figure 6 This is a schematic diagram of the electromagnetic block arrangement structure of this utility model;

[0057] Figure 7 This is a cross-sectional schematic diagram showing the positional relationship between the pulley and the embedded groove.

[0058] In the attached diagram, the structural names represented by each number are as follows:

[0059] 1-Roasting furnace, 101-Furnace opening, 2-Door support frame, 201-Embedded slide groove, 3-Crossbeam frame, 4-Winder, 401-Winder cable, 402-Suspension hook, 5-Suspension cable, 6-Roller, 7-Furnace door, 8-Pulley, 9-Embedded limiting groove, 901-Electromagnetic block insertion groove, 902-Electromagnetic block, 10-Limiting groove embedding flange, 1001-Limiting groove, 11-Speed ​​difference fall arrestor. Detailed Implementation

[0060] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0061] Example 1

[0062] A roasting furnace door lifting mechanism includes: a furnace door 7, a furnace door lifting assembly, a support assembly, a limiting structure, and a temporary connection structure;

[0063] The support assembly serves as the main support for the installation of the furnace door 7 and the furnace door lifting assembly; the roasting furnace 1 is located on one side of the support assembly, and the furnace opening 101 of the roasting furnace 1 is close to the support assembly; after the furnace door 7 is lowered, it covers and seals the furnace opening 101.

[0064] like Figure 2As shown, the support components in this embodiment include: door support frame 2 and crossbeam frame 3; two door support frames 2 are vertically arranged; the two door support frames 2 are arranged symmetrically from left to right; the door support frame 2 is a steel structure, with its lower end welded into the ground or fixed by bolts; a crossbeam frame 3 is arranged horizontally at the upper end of the two door support frames 2; the roasting furnace 1 is located on the left side of the door support frame 2, with the furnace opening 101 close to the door support frame 2.

[0065] A furnace door lifting assembly is installed on the crossbeam frame 3; the furnace door 7 is suspended and fixed at the lower end of the furnace door lifting assembly.

[0066] like Figure 3 As shown, the furnace door lifting assembly includes: suspension cable 5, rollers 6 and hoisting assembly; rollers 6 are located above the crossbeam frame 3; three sets of rollers 6 are provided, and each set of rollers 6 is provided with two independent tracks;

[0067] A roller 6 is installed on each of the left and right sides of the furnace door 7, and a roller 6 is installed on the far right side of the crossbeam frame 3.

[0068] like Figure 2 As shown, two suspension cables 5 are provided, and both suspension cables 5 are set on rollers 6; the same suspension cable 5 is located on the same side of the roller 6; after the first end of the two suspension cables 5 passes through the roller 6, they are vertically connected to the left and right sides above the furnace door 7 respectively.

[0069] The second ends of the two suspension cables 5 are integrally formed and connected; and after passing through the roller 6, they are located vertically downward outside the door support frame 2 of the support assembly; the second ends can move up or down to drive the two suspension cables 5 simultaneously; thereby realizing the lowering or raising of the furnace door 7;

[0070] The second end of the suspension cable 5 is connected to a winch assembly; the winch assembly is used for winch winding and unwinding, pulling the second end of the suspension cable 5 downward to raise the furnace door 7; or the second end moves upward to lower the furnace door 7.

[0071] like Figure 3 As shown, the aforementioned winch assembly includes: a winch 4, a winch cable 401, and a suspension hook 402.

[0072] The winch cable 401 is coiled on the winch 4; when the winch 4 rotates forward or reverse, the winch cable 401 can be wound back or unwound; the upper end of the winch cable 401 is connected to the second end of the suspension cable 5 via a hook 402. When the winch cable 401 is wound back, the second end of the suspension cable 5 moves down, at which time the furnace door 7 is suspended and raised; when the winch cable 401 is unwound, the second end of the suspension cable 5 moves up, at which time the furnace door 7 is suspended and lowered until it covers and seals the furnace opening 101 of the roasting furnace 1.

[0073] In the prior art, the furnace door 7 is only controlled to rise and fall by a suspension mechanism; since the furnace door 7 does not have any limiting structure, the furnace door 7 may shake during the suspension rising or falling; when the furnace door 7 shakes during the falling, it may not only displace upward and downward, but also swing left and right; in the unstable state, it falls to the furnace mouth 101 of the roasting furnace 1, and the gap between the furnace door 7 and the furnace mouth 101 is too large due to the shaking displacement of the furnace door 7, so that the furnace door 7 cannot achieve better sealing, and the roasting furnace 1 may have a fire running from the gap during the roasting of the material.

[0074] Therefore, the embodiment sets a limiting structure to limit the moving track of the furnace door 7, so that the furnace door 7 can only move in the vertical upward and downward direction;

[0075] As shown in Figure 3 The limiting structure includes a pulley 8 and an embedded sliding groove 201.

[0076] The embedded sliding groove 201 is arranged on the inner side of the two door support frames 2.

[0077] The same number of pulleys 8 are arranged on the left and right sides of the furnace door 7, and two groups of pulleys 8 are arranged on each side in the embodiment; the pulleys 8 are movably embedded in the embedded sliding groove 201.

[0078] The embedded sliding groove 201 is arranged as an inner groove structure; a part of the pulley 8 is embedded in the inner groove, and the circumferential wall of the pulley 8 always adheres to the groove bottom wall of the inner groove; the two side walls of the pulley 8 always adhere to the two side walls of the inner groove; in this way, the pulley 8 can only move upward or downward in the vertical direction relative to the embedded sliding groove 201, and cannot be separated from the embedded sliding groove 201; and the furnace door 7 can only move upward or downward in the vertical direction, and cannot swing or displace forward, backward, left or right; then, after the furnace door 7 seals the furnace mouth 101 of the roasting furnace 1, the position of the furnace door 7 relative to the furnace mouth 101 of the roasting furnace 1 is always fixed, so as to ensure the sealing performance of the furnace door 7 to the furnace mouth 101.

[0079] After the furnace door 7 seals the furnace mouth 101 of the roasting furnace 1, the furnace door 7 and the furnace mouth 101 are two independent structures; the position of the furnace door 7 is fixed only by the pulley 8 embedded in the embedded sliding groove 201; if the material reacts to generate gas during the roasting in the furnace, so that a positive pressure is formed in the furnace; then, the positive pressure in the furnace will cause an impact thrust to the furnace door 7; and only the cooperation between the pulley 8 and the embedded sliding groove 201 can hardly guarantee that the pulley 8 will not be damaged and separated from the embedded sliding groove 201 when the positive pressure is large, so that the furnace door 7 is pushed and displaced.

[0080] Therefore, after the furnace door 7 seals the furnace mouth 101, if a temporary connecting structure can be formed between the two, the two are connected as a whole; then, the impact resistance of the furnace door 7 is enhanced; and the risk of damage of the pulley 8 and the embedded sliding groove 201 is avoided.

[0081] As shown in Figure 4 and Figure 5 The temporary connection structure includes: an embedded limiting groove 9, an embedded groove flange 10, and a locking mechanism.

[0082] The embedded limiting groove 9 is arranged on both sides of the furnace mouth 101 of the roasting furnace 1. The opposite side of the furnace door 7 and the furnace mouth 101 is provided with an embedded groove flange 10 near the left and right sides of the furnace door 7. Due to the limiting of the pulley 8 and the embedded sliding groove 201 to the position of the furnace door 7, the embedded groove flange 10 can be slid into the embedded limiting groove 9 when the furnace door 7 is lowered each time. A locking mechanism is arranged on the inner wall of the embedded limiting groove 9. After the furnace door 7 is lowered to seal the furnace mouth 101, the embedded groove flange 10 is located in the embedded limiting groove 9, and the locking mechanism is used to lock the embedded limiting groove 9 and the embedded groove flange 10, so that the furnace door 7 cannot swing and move forward and backward relative to the furnace mouth 101 under the action of external force. The temporary connection between the two is achieved, and the impact and movement of the furnace door 7 caused by the positive pressure in the furnace is avoided.

[0083] The locking mechanism includes an electromagnetic block 902 and a limiting groove 1001.

[0084] The limiting groove 1001 is arranged on both sides of each embedded groove flange 10. The electromagnetic block placement groove 901 is arranged on both sides of each embedded limiting groove 9. The electromagnetic block 902 is movably arranged in the electromagnetic block placement groove 901. The electromagnetic block 902 is connected to an electromechanical control assembly. The embedded groove flange 10 is made of a magnetically attractable metal material. The width of the electromagnetic block 902 is slightly smaller than the width of the limiting groove 1001.

[0085] The electromagnetic block 902 and the electromechanical control assembly of the electromagnetic block are existing products, and their structures and working principles will not be described in detail here.

[0086] After the furnace door 7 seals the furnace mouth 101, the embedded groove flange 10 is located in the embedded limiting groove 9. The electromagnetic block 902 generates magnetism after being powered on, and the electromagnetic block 902 and the embedded groove flange 10 generate mutual magnetic attraction, so that the electromagnetic block 902 moves from the electromagnetic block placement groove 901 to a part of the limiting groove 1001 and is attracted, and at this time, the outer wall of the electromagnetic block 902 is attached to the inner wall of the limiting groove 1001. The cooperation of the electromagnetic block 902 and the limiting groove 1001 achieves the locking of the relative position between the furnace door 7 and the furnace mouth 101 in the forward and backward directions.

[0087] Embodiment 2

[0088] Based on the basis of example 1, this embodiment is provided between the cross beam frame 3 of the support assembly and the upper portion of the furnace door 7 with a speed difference anti-falling device 11; the upper end of the speed difference anti-falling device 11 is centrally arranged below the cross beam frame 3; the lower end of the speed difference anti-falling device 11 is centrally arranged above the furnace door 7.

[0089] The speed difference anti-falling device 11 is a product that can be directly purchased and used; its structure will not be described in detail here; if the furnace door lifting assembly fails, the furnace door 7 is not controlled by the furnace door lifting assembly and falls by itself, then during the rapid descent of the furnace door 7, the speed increases rapidly; at this time, the speed difference anti-falling device 11 can respond urgently and lock the descent of the furnace door 7; avoid the damage and deformation of the furnace door 7 after the descent.

[0090] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] The preferred embodiments of the above disclosed utility model are only used to help explain the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A roasting furnace door lifting mechanism characterized by comprising: The application relates to a furnace door lifting assembly and a support assembly for a roasting furnace. The furnace door lifting assembly is arranged on the support assembly. The furnace door is suspended below the furnace door lifting assembly. The support assembly is used for supporting the furnace door lifting assembly and the furnace door. The furnace door lifting assembly is used for controlling the lifting or lowering of the furnace door. The limit structure is arranged between the support assembly and the furnace door. The limit structure is used for limiting the activity track of the furnace door to be only vertically lifted or lowered. The temporary connecting structure is arranged between the furnace door and the furnace mouth after the furnace door seals the furnace mouth.

2. The mechanism according to claim 1, wherein The temporary connecting structure is used for temporarily forming the furnace door and the furnace mouth into an integrated body. The support assembly comprises door support frames and a cross beam frame. Two door support frames are vertically arranged. The two door support frames are symmetrically arranged.

3. The mechanism according to claim 2, wherein The cross beam frame is arranged at the upper ends of the two door support frames. The furnace door lifting assembly is arranged on the cross beam frame. The furnace door is arranged at the lower end of the furnace door lifting assembly. The furnace door lifting assembly comprises suspension ropes, rollers and a winch assembly. The rollers are arranged above the cross beam frame. One roller is arranged opposite to each side of the furnace door. The cross beam frame is arranged at the outermost side of the cross beam frame.

4. The door lifting mechanism of a roaster according to claim 3, wherein Two suspension ropes are arranged on the rollers. The first ends of the two suspension ropes are respectively connected to the left and right sides above the furnace door after passing through the rollers. The second ends of the two suspension ropes are integrally connected.

5. The mechanism according to claim 1, wherein The winch assembly is arranged on the second ends of the two suspension ropes. The winch assembly is used for winding and unwinding, pulling the second ends of the suspension ropes to move downward, so that the furnace door is lifted, or controlling the second ends of the suspension ropes to move upward, so that the furnace door is lowered. The winch assembly comprises a winch, a winch cable and a suspension hook. The winch cable is wound on the winch. The winch cable can be wound or unwound when the winch is rotated forward or reversely. The upper end of the winch cable is connected to the second end of the suspension rope through the suspension hook.

6. The mechanism according to claim 5, wherein The limit structure is arranged between the inner sides of the two door support frames of the support assembly and the two sides of the furnace door. The limit structure comprises pulleys and embedded sliding grooves. The embedded sliding grooves are arranged on the inner sides of the two door support frames.

7. The mechanism according to claim 1, wherein The same number of pulleys are arranged on the two sides of the furnace door. The pulleys are movably embedded in the embedded sliding grooves. The pulleys can only be vertically lifted or lowered relative to the embedded sliding grooves and cannot be separated from the embedded sliding grooves. The embedded sliding groove is arranged as an inner groove structure. A part of the pulley is embedded in the inner groove. The circumferential wall of the pulley always adheres to the groove bottom wall of the inner groove. The two side walls of the pulley always adhere to the two side walls of the inner groove. The temporary connecting structure comprises an embedded limit groove, a limit groove embedded flange and a locking mechanism. The embedded limit groove is arranged on the two sides of the furnace mouth. The limit groove embedded flanges are arranged on the opposite surfaces of the furnace door and close to the left and right sides of the furnace door. The inner wall of the embedded limiting groove is provided with a locking mechanism; after the oven door is lowered to seal the oven port, the limiting groove embedded flange is located in the embedded limiting groove, and the locking mechanism is used to lock the embedded limiting groove and the limiting groove embedded flange.

8. The mechanism according to claim 7, wherein The locking mechanism comprises an electromagnetic block and a limiting groove; The limiting groove is provided with a limiting groove on both sides of each limiting groove embedded flange; Each embedded limiting groove is provided with an electromagnetic block insertion groove on both sides; An electromagnetic block is movably arranged in the electromagnetic block insertion groove; The electromagnetic block is connected to a mechanical and electrical control assembly.

9. The mechanism according to claim 1, wherein A speed difference anti-falling device is arranged between the cross beam frame of the support assembly and the upper side of the oven door. The upper end of the speed difference anti-falling device is arranged centrally below the cross beam frame, and the lower end of the speed difference anti-falling device is arranged centrally above the oven door.

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