Novel annealing device

Abstract

A novel annealing device comprises a mounting support, an annealing mechanism, a lifting mechanism and a limiting mechanism, the annealing mechanism comprises an annealing furnace fixed to the top of the mounting support and a heat insulation base located below the annealing furnace, a heating pipe is arranged on the inner wall of the annealing furnace, and a furnace opening is formed in the bottom of the annealing furnace; the lifting mechanism comprises a rectangular bottom frame, two shear type supporting frames arranged on the two sides of the rectangular bottom frame and connected with the rectangular bottom frame in a hinged mode, a lifting rod rotationally connected with the two shear type supporting frames, a transverse rod located beside the lifting rod and fixedly connected with the two shear type supporting frames, and a lifting platform connected with the tops of the two shear type supporting frames in a hinged mode. The hydraulic oil cylinder is hinged with the rectangular bottom frame and the lifting rod; the heat insulation base is fixed on the upper surface of the lifting platform; the limiting mechanism comprises a first sleeve and a second sleeve which are respectively clamped on the cross rod and the rectangular bottom frame, and a rotary adjusting rod, the two ends of the rotary adjusting rod are in threaded connection with the first sleeve and the second sleeve, and the thread spiral directions of threads at the two ends of the rotary adjusting rod are opposite.

Description

Technical Field

[0001] This utility model relates to the field of sapphire glass annealing technology, and in particular to a novel annealing device. Background Technology

[0002] In the processing of sapphire glass buttons on the sidewalls of mobile phones, the buttons often need to be annealed in an annealing furnace to minimize or reduce residual stress and improve optical non-uniformity, resulting in glass buttons with a stable internal structure. Common glass annealing furnaces in the industry typically include a heat shield, 18 silicon molybdenum heating tubes housed inside the heat shield, a base at the bottom of the heat shield, and a hydraulic support below the base that drives its lifting and lowering. During annealing, the product is placed in a crucible on the upper surface of the base, and the hydraulic support lifts the product to a height comparable to the heating tubes, allowing for annealing. According to the annealing process requirements, the annealing process generally lasts 48 hours. Currently, the stability of the hydraulic support in the industry is relatively insufficient. As the annealing time increases, the actual height of the base will be lower than its initial height, increasing the gap between the base and the sidewall of the heat shield. This allows cold air to enter the heat shield, affecting its insulation performance. In this situation, the temperature difference between the upper and lower glass layers in the crucible is large, which will cause the product gloss to be dispersed. As a result, the products need to be tested and classified (product binning). This not only makes it easy to mix materials, but also increases the manpower and material resources for processing glass buttons, thereby increasing the processing cost of the side wall buttons of mobile phones. Utility Model Content

[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a new type of annealing device that features good stability of the lifting mechanism, good annealing sealing and heat preservation effects, significantly reduced product gloss, and lower product processing costs.

[0004] A novel annealing apparatus, comprising:

[0005] Mounting bracket;

[0006] The annealing mechanism includes an annealing furnace fixed to the top of a mounting bracket and a heat-insulating base located below the annealing furnace for receiving annealed products. The inner wall of the annealing furnace is provided with heating tubes, and the bottom of the annealing furnace has a furnace opening that communicates with the inner cavity of the annealing furnace. The outer contour shape of the upper part of the heat-insulating base is adapted to the inner contour shape of the furnace opening.

[0007] A lifting mechanism, comprising a rectangular base frame, two scissor-type support frames hinged to the rectangular base frame on opposite sides, a lifting rod rotatably connected to the two scissor-type support frames between them, a crossbar fixedly connected to the two scissor-type support frames beside the lifting rod, a lifting platform hinged to the two scissor-type support frames above them, and a hydraulic cylinder hinged to the rectangular base frame and the lifting rod, driving the scissor-type support frames to deform and raise or lower the height of the lifting platform. A heat-insulating base is fixed to the upper surface of the lifting platform and, driven by the lifting platform, moves away from or blocks the furnace opening.

[0008] The limiting mechanism includes a first sleeve that is snapped onto a crossbar, a second sleeve that is snapped onto a rectangular base frame, and a rotating adjusting rod located between the first and second sleeves. One end of the rotating adjusting rod is provided with a first threaded portion, and the other end of the rotating adjusting rod is provided with a second threaded portion. The threads of the first threaded portion and the second threaded portion are opposite in direction. One end of the rotating adjusting rod is inserted into the first sleeve and threadedly connected to the inner wall of the first sleeve, and the other end of the rotating adjusting rod is inserted into the second sleeve and threadedly connected to the inner wall of the second sleeve.

[0009] In one embodiment, an adjusting nut is fixedly sleeved on the middle of the rotating adjusting rod; or the middle of the rotating adjusting rod is provided with a socket or slot for inserting a rotating tool.

[0010] In one embodiment, the first sleeve has a first notch at the end away from the rotating adjustment rod that engages with the crossbar, and the second sleeve has a second notch at the end away from the rotating adjustment rod that engages with the rectangular base frame.

[0011] In one embodiment, the scissor support frame includes at least one scissor support mechanism, which includes two support rods that are arranged crosswise and hinged together.

[0012] In one embodiment, the scissor support frame includes a scissor support mechanism, with the bottoms of two support rods hinged to a rectangular base frame and the tops of the two support rods hinged to the lower surface of the lifting platform. One end of the lifting rod passes through the intersection of the two support rods on one side of the scissor support frame and is rotatably engaged with the two support rods. The other end of the lifting rod passes through the intersection of the two support rods on the other side of the scissor support frame and is rotatably engaged with the two support rods. The crossbar is parallel to the lifting rod and is fixedly connected to the two support rods on its two sides.

[0013] In one embodiment, the scissor support frame includes multiple scissor support mechanisms arranged sequentially from bottom to top. The support rods of the lower scissor support mechanisms are hinged to the support rods of the upper scissor support mechanisms. The support rods of the scissor support mechanisms at the bottom of the scissor support frame are hinged to the rectangular base frame. The support rods of the scissor support mechanisms at the top of the scissor support frame are hinged to the lower surface of the lifting platform. The lifting rod and the crossbar are both connected to the support rods of the scissor support mechanisms at the top of the scissor support frame.

[0014] In one embodiment, the lifting mechanism further includes a stand fixed to one side of the rectangular base frame and a handrail fixed to the top of the stand.

[0015] In one embodiment, the height of the heat insulation base is 210mm, the upper surface of the heat insulation base is flush with the inner bottom surface of the annealing furnace, and a pad is provided on the upper surface of the heat insulation base, and a gasket is provided on the upper surface of the pad, the height of the pad is 60mm, and the height of the gasket is 10mm.

[0016] In one embodiment, the annealing furnace is further provided with a thermocouple for detecting the temperature inside the annealing furnace cavity.

[0017] In one embodiment, a chassis fixed on a mounting bracket is provided on the outside of the annealing furnace. A temperature controller electrically connected to the thermocouple and heating tube is provided inside the chassis. A temperature control instrument panel electrically connected to the temperature controller is provided on the outer surface of the chassis.

[0018] The novel annealing device of this utility model incorporates a limiting mechanism on the lifting mechanism. When the hydraulic cylinder lifts the scissor support frame to seal the furnace opening with the heat insulation base, the adjusting rod is rotated to reduce the overall length of the limiting mechanism, allowing it to be positioned between the crossbars of the rectangular base frame. Subsequently, the adjusting rod is rotated in the opposite direction to increase the overall length of the limiting mechanism, causing the first sleeve to engage with the crossbar and the second sleeve to engage with the rectangular base frame, thereby tightening the crossbar and limiting the relative distance between the crossbar and the rectangular base frame. With the threaded limiting mechanism in place, the lifting mechanism is self-locked, improving its stability and suppressing the downward tendency of the lifting platform after lifting. This enhances the sealing and heat preservation effect of the annealing furnace after sealing, reduces the temperature difference within the furnace and the gloss difference of the annealed product, eliminates the need for subsequent product testing and sorting operations, and reduces product processing costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the novel annealing device in one embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional structural schematic diagram of the novel annealing device in one embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first sleeve in one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the second sleeve in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the rotating adjusting rod in one embodiment of the present invention;

[0024] Figure 6 This is a comparison chart showing the gloss of products annealed using a traditional annealing furnace and the novel annealing device of this invention. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] Please combine Figure 1-5This utility model discloses a novel annealing device 10 with good stability of the lifting mechanism, good annealing airtightness and heat preservation effect, greatly reduced product gloss, and reduced product processing cost. The novel annealing device 10 includes a mounting bracket 100, an annealing mechanism 200, a lifting mechanism 300, and a limiting mechanism 400. The annealing mechanism 200 includes an annealing furnace 210 fixed to the top of the mounting bracket 100 and a heat-insulating base 220 located below the annealing furnace 210 for receiving annealed products. The heat-insulating base 220 can seal the furnace opening under the drive of the lifting mechanism 300, so that a sealed annealing space is formed inside the annealing furnace 210 and the product is annealed in the annealing space, or it can leave the furnace opening under the drive of the lifting mechanism 300 so that the annealed product can be taken out. The inner wall of the annealing furnace 210 is provided with heating tubes 211. When the heating tubes 211 are working, they generate heat, which raises the temperature inside the annealing furnace 210 so as to heat the product. The bottom of the annealing furnace 210 has a furnace opening 212 that communicates with the inner cavity of the annealing furnace 210. The outer contour shape of the upper part of the heat insulation base 220 is adapted to the inner contour shape of the furnace opening 212 so that the heat insulation base 220 can completely seal the furnace opening 212 after being pushed into the furnace opening 212, thereby ensuring the airtightness of the annealing furnace 210. The lifting mechanism 300 includes a rectangular base frame 310, two scissor support frames 320 that are arranged opposite to each other on both sides of the rectangular base frame 310 and hinged to the rectangular base frame 310, a lifting rod 330 located between the two scissor support frames 320 and rotatably connected to the two scissor support frames 320, a crossbar 340 located beside the lifting rod 330 and fixedly connected to the two scissor support frames 320, a lifting platform 350 located above the scissor support frames 320 and hinged to the two scissor support frames 320, a hydraulic cylinder 360 that is hinged to the rectangular base frame 310 and the lifting rod 330 and drives the scissor support frames 320 to deform in order to raise or lower the height of the lifting platform 350, and a heat-insulating base 220 fixed to the upper surface of the lifting platform 350 and moving away from or blocking the furnace opening 212 under the action of the lifting platform 350. The limiting mechanism 400 includes a first sleeve 410 that is snapped onto the crossbar 340, a second sleeve 420 that is snapped onto the rectangular base frame 310, and a rotating adjusting rod 430 located between the first sleeve 410 and the second sleeve 420. One end of the rotating adjusting rod 430 is provided with a first threaded portion 431, and the other end of the rotating adjusting rod 430 is provided with a second threaded portion 432. The thread helix directions of the first threaded portion 431 and the second threaded portion 432 are opposite. One end of the rotating adjusting rod 430 is inserted into the first sleeve 410 and threadedly connected to the inner wall of the first sleeve 410, and the other end of the rotating adjusting rod 430 is inserted into the second sleeve 420 and threadedly connected to the inner wall of the second sleeve 420.

[0027] During the operation of the hydraulic cylinder 360, when hydraulic oil is introduced into the cylinder of the hydraulic cylinder 360, the telescopic rod of the hydraulic cylinder 360 extends and pushes the lifting rod 330 away from the rectangular base frame 310. During this process, the scissor support frame 320 deforms under the action of the lifting rod 330, and the top height of the scissor support frame 320 is raised, thereby driving the lifting platform 350 and the heat insulation base 220 set on the lifting platform 350 to rise, so that the heat insulation base 220 can be pushed into the furnace opening 212 and the annealing furnace 210 can be sealed. Conversely, after the hydraulic oil in the cylinder of hydraulic cylinder 360 is discharged, the telescopic rod of hydraulic cylinder 360 retracts and pulls the lifting rod 330 to move it closer to the rectangular base frame 310. During this process, the scissor support frame 320 deforms under the action of the lifting rod 330, and the top height of the scissor support frame 320 decreases, thereby causing the lifting platform 350 and the heat insulation base 220 set on the lifting platform 350 to descend, so as to remove the heat insulation base 220 from the furnace opening 212 and take out the annealed product. It should be noted that during the lifting process of the lifting platform, the limiting mechanism is removed from the lifting mechanism to ensure the normal operation of the lifting mechanism. When the hydraulic cylinder 360 lifts the scissor support frame 320 to block the furnace opening 212 with the heat insulation base 220, the adjusting rod 430 is rotated in the second direction to reduce the overall length of the limiting mechanism 400 so that the limiting mechanism 400 is placed between the crossbars 340 of the rectangular base frame 310. Then, the adjusting rod 430 is rotated in the opposite direction (first direction) to increase the overall length of the limiting mechanism 400 so that the first sleeve is engaged with the crossbar 340 and the second sleeve is engaged with the rectangular base frame 340, thereby tightening the crossbar 340 to limit the relative distance between the crossbar 340 and the rectangular base frame 310. This avoids the problem of the heat insulation base 220 dropping in height due to the deformation of the scissor support frame 320 during the annealing process, thus ensuring the airtightness of the annealing furnace 210 during the annealing process. After the annealing process is completed, rotate the adjusting rod 430 again in the second direction. The overall length of the limiting mechanism 400 is reduced so that the limiting mechanism 400 can be removed from between the crossbar 340 and the rectangular base frame 310 to ensure the normal descent of the lifting platform, thereby taking the heat insulation base 220 away from the furnace opening 212.

[0028] The mounting bracket 100 includes a horizontally arranged rectangular frame 110 and four columns 120 located below the rectangular frame 110 and fixedly connected to the four corners of the rectangular frame 110. The tops of the columns 120 are welded to the rectangular frame 110, or the tops of the columns 120 are screwed to the rectangular frame 110. The rectangular frame 110 and the four columns 120 together form a lifting space for accommodating the lifting mechanism 300 and the limiting mechanism 400. The rectangular frame 110 is used to connect the four columns 120 as a whole to improve the overall structural stability of the mounting bracket 100. At the same time, the rectangular frame 110 also supports the annealing furnace 210. The columns 120 are used to raise the height of the annealing furnace 210 so that the product to be annealed can be sent from below the annealing furnace 210 into the inner cavity of the annealing furnace 210 using the lifting mechanism 300.

[0029] Annealing furnace 210 is used to provide a place for annealing products. In this embodiment, annealing furnace 210 includes furnace body 213, furnace top plate 214 and furnace bottom plate 215. Furnace body 213 is a square ring structure surrounded by four furnace walls. Furnace top plate 214 is located inside furnace body 213 and is fixedly connected to the inner wall of furnace body 213. The upper surface of furnace top plate 214 is flush with the upper surface of furnace body 213. Furnace bottom plate 215 is fixed to the lower surface of furnace body 213, and furnace opening 212 is opened in the middle of furnace bottom plate 215. The furnace wall consists of a first alumina layer 2131, a mullite fiberboard 2132, and a second alumina layer 2133, which are arranged layer by layer from the inner cavity of the furnace body 213 outwards. The thickness of the first alumina layer 2131 is 65mm, the thickness of the mullite fiberboard 2132 is 70mm, and the thickness of the second alumina layer 2133 is 40mm. Both the first alumina layer 2131 and the second alumina layer 2133 are alumina fiber blankets. The furnace top plate 214 is made of refractory bricks with a thickness of 250 mm and a width of 750 mm. The furnace bottom plate 215 includes a first refractory brick layer 2151 fixedly connected to the lower surface of the furnace body 213 and a second refractory brick layer 2152 fixedly connected to the lower surface of the first refractory brick layer 2151. The first refractory brick layer 2151 has a thickness of 65 mm, and the second refractory brick layer 2152 has a thickness of 75 mm. A first through hole with a width of 530 mm is opened in the middle of the first refractory brick layer 2151, and a second through hole with a width of 620 mm is opened in the middle of the second refractory brick layer 2152. The first and second through holes together form the furnace opening 212. A high-temperature resistant sealing layer 2153 is provided on the lower surface of the second refractory brick layer 2152, and a third through hole with a width of 790 mm is opened in the middle of the high-temperature resistant sealing layer 2153.

[0030] The inner wall of the furnace body 213 and the lower surface of the furnace top plate 214 are further provided with a third refractory brick layer 216 with a thickness of 50mm. The heating tube 211 is a silicon molybdenum rod fixed on the third refractory brick layer 216, and the distance from the bottom of the heating tube 211 to the upper surface of the first refractory brick layer 2151 is 60mm. Furthermore, a thermocouple 217 for detecting the internal temperature of the annealing furnace 210 is also provided inside the annealing furnace 210. A housing 218 fixed on the mounting bracket 100 is provided on the outside of the annealing furnace 210. A temperature controller electrically connected to the thermocouple 217 and the heating tube 211 is provided inside the housing 218, and a temperature control instrument panel 219 electrically connected to the temperature controller is provided on the outer surface of the housing 218. In this way, the temperature inside the annealing furnace 210 is monitored in real time by the thermocouple 217, so that the temperature controller can adjust the heating temperature of the heating tube 211 in real time according to the monitored furnace temperature, thereby controlling the annealing temperature of the product.

[0031] In this embodiment, the heat-insulating base 220 has a stepped structure, including a first mullite layer 221, a second mullite layer 222, and a third mullite layer 223 from bottom to top. The first mullite layer 221 has a thickness of 80 mm and a width of 790 mm. The second mullite layer 222 is fixed to the middle of the upper surface of the first mullite layer 221, with a thickness of 65 mm and a width of 620 mm. The third mullite layer 223 is fixed to the middle of the upper surface of the second mullite layer 222, with a thickness of 65 mm and a width of 530 mm. When the heat-insulating base 220 is pushed into the furnace opening 212, the first mullite layer 221 abuts against the lower surface of the second refractory brick layer 2152, and the side of the first mullite layer 221 abuts against the high-temperature resistant sealing layer 2153 to seal the furnace opening 212. Furthermore, the heat insulation base 220 has a height of 210mm, and its upper surface is flush with the inner bottom surface of the annealing furnace 210. A pad 224 is provided on the upper surface of the heat insulation base 220, and a gasket 225 is provided on the upper surface of the pad 224. The pad 224 has a height of 60mm, and the gasket 225 has a height of 10mm. Both the pad 224 and the gasket 225 are cut from mullite slabs. By setting the pad 224 and the gasket 225, the height difference between the product and the heating tube 211 is shortened, making the heating of the upper and lower layers of the product more uniform and improving the heat preservation effect.

[0032] The scissor support frame 320 includes at least one scissor support mechanism, which includes two support rods 321 that are cross-arranged and hinged together. When the lifting rod 330 rises under the push of the telescopic rod of the hydraulic cylinder 360, the two cross-arranged support rods 321 move closer to each other, and the included angle between them decreases, thereby increasing the height of the top of the support rods 321 to raise the height of the lifting platform 350. In one embodiment, the scissor support frame 320 includes a scissor support mechanism. The bottoms of the two support rods 321 are respectively hinged to the rectangular base frame 310, and the tops of the two support rods 321 are respectively hinged to the lower surface of the lifting platform 350. One end of the lifting rod 330 passes through the intersection of the two support rods 321 of the scissor support frame 320 on one side of the lifting rod 330 and is rotatably engaged with the two support rods 321. The other end of the lifting rod 330 passes through the intersection of the two support rods 321 of the scissor support frame 320 on the other side of the lifting rod 330 and is rotatably engaged with the two support rods 321. The crossbar 340 is parallel to the lifting rod 330 and is fixedly connected to the two support rods 321 on both sides of the crossbar 340. The crossbar 340 can be located above or below the lifting rod 330. In another embodiment, the scissor support frame 320 includes multiple scissor support mechanisms, which are sequentially distributed from bottom to top. The support rod 321 of the lower scissor support mechanism is hinged to the support rod 321 of the upper scissor support mechanism. After two adjacent scissor support mechanisms are hinged together, they form a parallelogram region. The support rod 321 of the scissor support mechanism at the bottom of the scissor support frame 320 is hinged to the rectangular base frame 310. The support rod 321 of the scissor support mechanism at the top of the scissor support frame 320 is hinged to the lower surface of the lifting platform 350. The lifting rod 330 and the crossbar 340 are both connected to the support rod 321 of the scissor support mechanism at the top of the scissor support frame 320. That is, the lifting rod 330 and the crossbar 340 are both installed on the support rod 321 at the top of the scissor support frame 320. Thus, when the hydraulic cylinder 360 lifts or pulls back the lifting rod 330, the lifting rod 330 drives the supporting rod 321 that it works with to swing, and at the same time, each supporting rod 321 located below the lifting rod 330 will also swing, so as to achieve the overall deformation of the scissor support frame 320.

[0033] Furthermore, the lifting mechanism 300 also includes a support frame 370 fixed to one side of the rectangular base frame 310 and a handrail 380 fixed to the top of the support frame 370. A caster wheel may also be provided at the bottom of the rectangular base frame 310, and the caster wheel is equipped with a locking mechanism that allows it to swing and be pressed or released under external force. Thus, by gripping and pushing the handrail 380, the position of the lifting mechanism 300 and the limiting mechanism 400 can be transferred.

[0034] The limiting mechanism 400 is used to lock or unlock the lifting mechanism 300 to ensure that the height of the heat insulation base 220 remains constant during the annealing process, thereby ensuring the airtightness of the annealing furnace 210. The inner wall of the first sleeve 410 is provided with a third threaded portion that is threadedly connected to the first threaded portion 431, and the inner wall of the second sleeve 420 is provided with a fourth threaded portion that is threadedly connected to the second threaded portion 432. In one embodiment, the thread helix direction of the first threaded portion 431 is clockwise, and the thread helix direction of the second threaded portion 432 is counterclockwise; the first direction is clockwise, and the second direction is counterclockwise. In another embodiment, the thread helix direction of the first threaded portion 431 is counterclockwise, and the thread helix direction of the second threaded portion 432 is clockwise; the first direction is counterclockwise, and the second direction is clockwise. In this embodiment, the first sleeve 410 has a first notch 411 at the end away from the rotating adjustment rod, which engages with the crossbar, and the second sleeve 420 has a second notch 421 at the end away from the rotating adjustment rod, which engages with the rectangular base frame. This is so that when the limiting mechanism is installed, the first sleeve 410 and the crossbar are limited, and the second sleeve 420 and the rectangular base frame are limited.

[0035] Furthermore, in one embodiment, an adjusting nut is fixedly sleeved on the middle of the rotating adjusting rod 430. Thus, the adjusting rod 430 can be rotated by clamping the adjusting nut with a wrench and rotating the wrench. In another embodiment, the middle of the rotating adjusting rod 430 has a socket or slot 433 for inserting a rotating tool. Thus, the rotating adjusting rod 430 can be rotated by inserting an external rotating rod into the socket or slot 433 and rotating the rotating rod around its axis.

[0036] Please combine Figure 1-6 The novel annealing device 10 of this solution, by setting a limiting mechanism 400, can prevent the heat insulation base 220 from falling during the annealing process, thereby preventing heat loss from the annealing furnace 210. This solves the problem of uneven furnace temperature between the upper and lower parts of the annealing furnace 210, controls the furnace temperature difference within 40℃, reduces the product gloss difference to 14.4GU, and distributes the overall product gloss between 115-130GU. By controlling the furnace temperature, the goal of controlling gloss is ultimately achieved. In the next process, the binning operation can be eliminated, thereby preventing workers from mixing materials and saving manpower and resources.

[0037] The novel annealing device 10 implementing this utility model includes a limiting mechanism 400 on the lifting mechanism 300. When the hydraulic cylinder 360 lifts the scissor support frame 320 to block the furnace opening 212 with the heat insulation base 220, the adjusting rod 430 is rotated to reduce the overall length of the limiting mechanism 400, so that the limiting mechanism 400 is positioned between the crossbars 340 of the rectangular base frame 310. Subsequently, the adjusting rod 430 is rotated in the opposite direction to increase the overall length of the limiting mechanism 400, so that the first sleeve is engaged with the crossbar 340 and the second sleeve... It is snapped onto the rectangular base frame 340, thereby tightening the crossbar 340 to limit the relative distance between the crossbar 340 and the rectangular base frame 310. Under the condition of threaded limit, the lifting mechanism 300 is self-locked, which improves the stability of the lifting mechanism 300. It can suppress the downward trend of the lifting platform 350 after lifting, improve the annealing airtightness and heat preservation effect after the annealing furnace is closed, reduce the furnace temperature difference in the annealing furnace 210 and the gloss difference of the annealed product, eliminate the need for subsequent product testing and sorting operations, and reduce the product processing cost.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A novel annealing apparatus, characterized in that, include: Mounting bracket; The annealing mechanism includes an annealing furnace fixed to the top of a mounting bracket and a heat-insulating base located below the annealing furnace for receiving annealed products. The inner wall of the annealing furnace is provided with heating tubes, and the bottom of the annealing furnace has a furnace opening that communicates with the inner cavity of the annealing furnace. The outer contour shape of the upper part of the heat-insulating base is adapted to the inner contour shape of the furnace opening. A lifting mechanism, comprising a rectangular base frame, two scissor-type support frames hinged to the rectangular base frame on opposite sides, a lifting rod rotatably connected to the two scissor-type support frames between them, a crossbar fixedly connected to the two scissor-type support frames beside the lifting rod, a lifting platform hinged to the two scissor-type support frames above them, and a hydraulic cylinder hinged to the rectangular base frame and the lifting rod, driving the scissor-type support frames to deform and raise or lower the height of the lifting platform. A heat-insulating base is fixed to the upper surface of the lifting platform and, driven by the lifting platform, moves away from or blocks the furnace opening. The limiting mechanism includes a first sleeve that is snapped onto a crossbar, a second sleeve that is snapped onto a rectangular base frame, and a rotating adjusting rod located between the first and second sleeves. One end of the rotating adjusting rod is provided with a first threaded portion, and the other end of the rotating adjusting rod is provided with a second threaded portion. The threads of the first threaded portion and the second threaded portion are opposite in direction. One end of the rotating adjusting rod is inserted into the first sleeve and threadedly connected to the inner wall of the first sleeve, and the other end of the rotating adjusting rod is inserted into the second sleeve and threadedly connected to the inner wall of the second sleeve.

2. The novel annealing apparatus according to claim 1, characterized in that, An adjusting nut is fixedly sleeved on the middle part of the rotating adjusting rod; or an insertion hole or slot for inserting a rotating tool is provided in the middle part of the rotating adjusting rod.

3. The novel annealing apparatus according to claim 1, characterized in that, The first sleeve has a first notch at the end away from the rotating adjustment rod that engages with the crossbar, and the second sleeve has a second notch at the end away from the rotating adjustment rod that engages with the rectangular base frame.

4. The novel annealing apparatus according to claim 1, characterized in that, The scissor support frame includes at least one scissor support mechanism, which includes two support rods that are arranged crosswise and hinged together.

5. The novel annealing apparatus according to claim 4, characterized in that, The scissor support frame includes a scissor support mechanism. The bottoms of the two support rods are hinged to the rectangular base frame, and the tops of the two support rods are hinged to the lower surface of the lifting platform. One end of the lifting rod passes through the intersection of the two support rods on one side of the scissor support frame and is rotatably engaged with the two support rods. The other end of the lifting rod passes through the intersection of the two support rods on the other side of the scissor support frame and is rotatably engaged with the two support rods. The crossbar is parallel to the lifting rod and is fixedly connected to the two support rods on its two sides.

6. The novel annealing apparatus according to claim 4, characterized in that, The scissor support frame includes multiple scissor support mechanisms, which are arranged sequentially from bottom to top. The support rods of the lower scissor support mechanisms are hinged to the support rods of the upper scissor support mechanisms. The support rods of the scissor support mechanisms at the bottom of the scissor support frame are hinged to the rectangular base frame. The support rods of the scissor support mechanisms at the top of the scissor support frame are hinged to the lower surface of the lifting platform. The lifting rods and crossbars are both connected to the support rods of the scissor support mechanisms at the top of the scissor support frame.

7. The novel annealing apparatus according to claim 1, characterized in that, The lifting mechanism also includes a stand fixed to one side of the rectangular base frame and a handrail fixed to the top of the stand.

8. The novel annealing apparatus according to claim 1, characterized in that, The heat insulation base has a height of 210mm, and its upper surface is flush with the inner bottom surface of the annealing furnace. A pad is provided on the upper surface of the heat insulation base, and a gasket is provided on the upper surface of the pad. The height of the pad is 60mm, and the height of the gasket is 10mm.

9. The novel annealing apparatus according to claim 1, characterized in that, The annealing furnace is also equipped with thermocouples for detecting the temperature inside the furnace cavity.

10. The novel annealing apparatus according to claim 9, characterized in that, An outer casing fixed on a mounting bracket is provided on the outside of the annealing furnace. Inside the casing is a temperature controller electrically connected to the thermocouple and heating tube. A temperature control instrument panel electrically connected to the temperature controller is provided on the outer surface of the casing.

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