A multi-layer tunnel furnace

Abstract

The present application belongs to the technical field of tunnel furnace, and relates to a multilayer tunnel furnace, which comprises a frame body covered with a heat preservation layer, a high-temperature curing zone fixed in the frame body, the high-temperature curing zone being composed of two or more high-temperature tunnels, a flow line and a heating assembly being arranged in the high-temperature tunnel, a high-temperature lifting mechanism fixed in the frame body at the end of the high-temperature tunnel and used for transferring workpieces between different high-temperature tunnels, a cooling tunnel located below the high-temperature curing zone, a flow line and a cooling assembly being arranged in the high-temperature tunnel, and a cooling lifting mechanism fixed outside the frame body, located at the other end of the high-temperature tunnel opposite to the first lifting mechanism and used for transferring workpieces in the high-temperature curing zone to the cooling tunnel, wherein the heat preservation layer at the inlet and the outlet of the high-temperature curing zone is provided with a gap, the gap of the heat preservation layer is respectively provided with a heat insulation door, and the heat insulation door is driven to reciprocate by a telescopic mechanism.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel furnace, and relates to a multi-layer tunnel furnace. BACKGROUND

[0002] The tunnel furnace is a tunnel type mechanical equipment for completing baking through heat conduction, convection and radiation. The tunnel furnace is a heating equipment widely used in industrial applications. The product is continuously conveyed in the tunnel, and the product is heated through heat conduction, convection and radiation. The tunnel furnace can provide a stable heat environment.

[0003] The existing tunnel furnace is usually one layer. In order to ensure the heating time of the workpiece, the conveying speed of the workpiece in the tunnel furnace is very slow, which seriously affects the production capacity. In order to improve the production capacity, the length of the tunnel needs to be increased, or multiple tunnel furnaces need to be purchased to work at the same time. This greatly increases the floor area and production cost of the tunnel furnace. The production capacity is increased by increasing the length of the tunnel furnace, which is limited by the site and has a limited improvement range. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides a multi-layer tunnel furnace. The length of the workpiece actually passing through the tunnel is prolonged, the floor area is reduced, and the production capacity is improved by stacking two or more high-temperature tunnels.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A multi-layer tunnel furnace comprises:

[0007] A frame body is covered with a heat preservation layer on the periphery.

[0008] A high-temperature curing zone is fixed in the frame body. The high-temperature curing zone is composed of two or more high-temperature tunnels. A flow line and a heating assembly are arranged in the high-temperature tunnel.

[0009] A high-temperature lifting mechanism is fixed in the frame body at the end of the high-temperature tunnel, and is used for transferring the workpiece between different high-temperature tunnels.

[0010] A cooling tunnel is arranged below the high-temperature curing zone. A flow line and a cooling assembly are arranged in the high-temperature tunnel.

[0011] A cooling lifting mechanism is fixed outside the frame body and is located at the other end of the high-temperature tunnel opposite to the first lifting mechanism, and is used for transferring the workpiece in the high-temperature curing zone to the cooling tunnel.

[0012] The heat preservation layer at the inlet and the outlet of the high-temperature curing zone is provided with a notch. Heat insulation doors are arranged at the notches of the heat preservation layer, respectively. The heat insulation doors are driven to reciprocate through the telescopic mechanism.

[0013] Further, the pipeline is a high-temperature multiple-speed chain pipeline.

[0014] Further, the high-temperature curing zone comprises a first high-temperature tunnel and a second high-temperature tunnel, the second high-temperature tunnel is located above the first high-temperature tunnel, and the cooling tunnel is located below the first high-temperature tunnel, and the pipeline in the first high-temperature tunnel, the second high-temperature tunnel and the cooling tunnel is a rotary structure.

[0015] Wherein, two high-temperature lifting mechanisms and two cooling lifting mechanisms are respectively located at two ends of the first high-temperature tunnel, the high-temperature lifting mechanism reciprocates between the first high-temperature tunnel and the second high-temperature tunnel, and the cooling lifting mechanism reciprocates between the first high-temperature tunnel and the cooling tunnel.

[0016] Further, it further comprises a mechanical arm, the grabbing end of the mechanical arm can reciprocate directly in the cooling lifting mechanism and the outside world, and the mechanical arm is used for feeding and discharging the workpiece.

[0017] Further, the first high-temperature tunnel comprises a first pipeline and a second pipeline, and the first pipeline and the second pipeline are arranged side by side.

[0018] The running directions of the first pipeline and the second pipeline are opposite, the first pipeline is corresponding to the entrance of the high-temperature curing zone, and the second pipeline is corresponding to the exit of the high-temperature curing zone.

[0019] Wherein, the transmission direction of the first pipeline is from the entrance to the high-temperature lifting mechanism, and the transmission direction of the second pipeline is from the high-temperature lifting mechanism to the exit.

[0020] Further, the second high-temperature tunnel comprises a third pipeline and a fourth pipeline arranged side by side.

[0021] The third pipeline is located above the first pipeline, and the direction of the third pipeline is opposite to that of the first pipeline.

[0022] The fourth pipeline is located above the second pipeline, and the direction of the fourth pipeline is opposite to that of the third pipeline.

[0023] Wherein, the second high-temperature tunnel is provided with a first rail changing mechanism at the other end of the high-temperature lifting mechanism, the first rail changing mechanism spans the third pipeline and the fourth pipeline, and the first rail changing mechanism is used for transferring the workpiece from the third pipeline to the fourth pipeline.

[0024] Further, the cooling tunnel comprises a fifth pipeline and a sixth pipeline.

[0025] The fifth pipeline is located below the second pipeline, and the transmission direction of the fifth pipeline is opposite to that of the second pipeline.

[0026] The sixth pipeline is located below the first pipeline, and the transmission direction of the sixth pipeline is opposite to the direction of the fifth pipeline.

[0027] The second rail changing mechanism is arranged opposite to the cooling lifting mechanism in the cooling tunnel, and the second rail changing mechanism crosses the fifth pipeline and the sixth pipeline.

[0028] Further, the high-temperature lifting mechanism comprises vertically installed side plates, a connecting mechanism slidingly installed between the two side plates, and a lifting mechanism driving the connecting mechanism to lift.

[0029] The base is provided with a through slot in the transmission direction of the workpiece.

[0030] The driving shaft and the driven shaft are rotatably installed between the side walls of the through slot.

[0031] The driving shaft and the driven shaft are provided with chain wheels at both ends close to the side walls of the through slot.

[0032] The transmission chain is provided on the chain wheels at both ends of the driving shaft and the driven shaft, and the transmission chain is used to support the workpiece.

[0033] The connecting motor is fixed on the side of the base and is used to drive the driving shaft to rotate.

[0034] Further, the lifting mechanism comprises a lifting motor, a lead screw, and a lifting platform, the lifting platform is slidingly installed between the two side plates and is used to support the connecting mechanism, the lead screw is vertically installed, the lifting platform is threadedly connected with the lead screw through a lead screw seat, and the lifting motor is used to drive the lifting platform to move up and down through the lead screw.

[0035] Further, the cooling lifting mechanism comprises a base, a lifting cylinder, a lifting platform, and a connecting mechanism.

[0036] The lifting platform is slidingly installed on the base through a sliding rail, the lifting platform is connected with the telescopic rod of the lifting cylinder, and the cylinder is used to drive the lifting platform to reciprocatingly lift.

[0037] The connecting mechanism is fixed on the lifting platform and is used to transfer the workpiece.

[0038] The connecting mechanism comprises a base, a driving shaft, a driven shaft, a chain wheel and a transmission chain, and a connecting motor.

[0039] The technical scheme of the present application has the following advantages over the prior art:

[0040] 1. The high-temperature curing zone is composed of two or more high-temperature tunnels, which can multiply the length of the actual tunnel without increasing the floor area, thus accelerating the transmission speed of the workpiece and improving the production capacity.

[0041] 2. In order to improve the stability of the work under high-temperature environment, the transmission belt adopts a multiple-speed chain, the connecting mechanism adopts chain transmission, and the high-temperature lifting device adopts a motor-external screw rod transmission, thus reducing the maintenance cost and improving the stability.

[0042] 3. The cooling tunnel is additionally provided, so that the workpiece surface temperature can be restored to near room temperature after passing through the high-temperature curing zone and the cooling channel, which does not affect the unloading and handling of the workpiece and helps to improve the production capacity.

[0043] 4. The flow lines in the first high-temperature tunnel, the second high-temperature tunnel and the cooling tunnel are of a rotary structure, forming three layers of six temperature zones, which greatly improves the number of workpieces simultaneously heated and cured, and on the premise of ensuring the heating time of the workpiece, the transmission speed of the workpiece can be improved, thus achieving the effect of improving the production capacity.

[0044] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0045] The present application will be described in detail below with reference to the accompanying drawings, so that the above advantages of the present application can be more apparent.

[0046] Figure 1 is a schematic view of a multi-layer tunnel furnace of the present application;

[0047] Figure 2 is a schematic view of a multi-layer tunnel furnace of the present application;

[0048] Figure 3 is a schematic view of a multi-layer tunnel furnace of the present application;

[0049] Figure 4 is a first high-temperature tunnel plan view of a multi-layer tunnel furnace according to the present application;

[0050] Figure 5 is a first high-temperature tunnel schematic view of a multi-layer tunnel furnace according to the present application;

[0051] Figure 6 is a second high-temperature tunnel plan view of a multi-layer tunnel furnace according to the present application;

[0052] Figure 7 is a second high-temperature tunnel schematic view of a multi-layer tunnel furnace according to the present application;

[0053] Figure 8 is a first rail-changing mechanism schematic view of a multi-layer tunnel furnace according to the present application;

[0054] Figure 9 is a high-temperature curing zone side view of a multi-layer tunnel furnace according to the present application;

[0055] Figure 10 is a high-temperature curing zone schematic view of a multi-layer tunnel furnace according to the present application;

[0056] Figure 11 is a cooling tunnel plan view of a multi-layer tunnel furnace according to the present application;

[0057] Figure 12 is a cooling tunnel schematic view of a multi-layer tunnel furnace according to the present application;

[0058] Figure 13 is a cooling lifting mechanism schematic view of a multi-layer tunnel furnace according to the present application;

[0059] Figure 14 is a partial structure schematic view of a multi-layer tunnel furnace according to the present application;

[0060] Figure 15 is a high-temperature lifting mechanism schematic view of a multi-layer tunnel furnace according to the present application;

[0061] Figure 16 is a connection mechanism schematic view of a multi-layer tunnel furnace according to the present application;

[0062] Figure 17 is a high-temperature lifting mechanism partial schematic view of a multi-layer tunnel furnace according to the present application;

[0063] Figure 18 is a fixed roller set schematic view of a multi-layer tunnel furnace according to the present application;

[0064] Figure 19 is a transmission direction schematic view of a multi-layer tunnel furnace according to the present application. DETAILED DESCRIPTION

[0065] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same elements or elements having the same function. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application.

[0066] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the orientations or positional relationships described based on the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0067] In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0068] In the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] Referring to the drawings Figures 1-3 As shown in the drawings, a multi-layer tunnel furnace comprises:

[0070] A rack body 100 is covered with a heat preservation layer 110 on the periphery;

[0071] A high-temperature curing area 200 is fixed in the rack body 100, and the high-temperature curing area 200 is composed of two or more high-temperature tunnels stacked, and a flow line and a heating assembly are arranged in the high-temperature tunnels;

[0072] A high-temperature lifting mechanism 300 is fixed in the rack body 100 at the end of the high-temperature tunnel, and is used for transferring workpieces between different high-temperature tunnels;

[0073] Cooling tunnel 400, located below high-temperature curing area 200, the high-temperature tunnel is provided with a production line and a cooling assembly inside;

[0074] Cooling lifting mechanism 500 is fixed outside frame 100, and is located at the other end of the high-temperature tunnel opposite to the first lifting, and is used for transferring the workpiece in high-temperature curing area 200 to cooling tunnel 400;

[0075] Wherein, the heat preservation layer 110 at the entrance 120 and the exit 130 of the high-temperature curing area 200 is provided with a gap, and the gap of the heat preservation layer 110 is respectively provided with a heat insulation door, and the heat insulation door is driven to reciprocate by the telescopic mechanism.

[0076] Compared with the existing tunnel furnace high-temperature curing area 200, the capacity is limited. The embodiment of the application is characterized in that the high-temperature curing area 200 is composed of multiple high-temperature tunnels in the vertical direction, so that the distance of the tunnel through which the workpiece passes is doubled. The workpiece enters from the entrance of the high-temperature curing area 200, is driven along the driving direction, is transferred by the high-temperature lifting mechanism 300, and the workpiece sequentially passes through different layers of high-temperature tunnels to perform high-temperature baking process. Under the cooperation of the structure of two or more layers of high-temperature tunnels and the high-temperature lifting mechanism 300, the length of the tunnel can be doubled without increasing the plane area, that is, under the premise of ensuring the high-temperature baking time, the transmission speed of the workpiece is improved, and the capacity of the tunnel furnace is improved.

[0077] In the embodiment, in order to improve the efficiency, the frame 100 is provided with a heat preservation layer 110, and the high-temperature curing area 200 is located in the frame 100, that is, two or more high-temperature tunnels are located in the heat preservation layer 110. The high-temperature lifting mechanism 300 is also located in the frame 100, that is, when the workpiece sequentially passes through the high-temperature tunnel and the high-temperature lifting mechanism 300 after entering the high-temperature curing area 200 from the outside through the heat preservation layer 110, the workpiece is in a uniform heating state, avoiding the alternating cold and hot conditions, and ensuring the heating and curing effect. That is, two or more tunnel furnaces do not need to be covered with heat preservation materials separately, and the heating assemblies of two or more tunnel furnaces jointly maintain the temperature of the high-temperature curing area 200 of the frame 100.

[0078] In the embodiment, after the workpiece sequentially passes through the high-temperature curing area 200 for baking, in order to facilitate the transfer of the workpiece and make the workpiece recover to room temperature faster, the workpiece is transferred to the cooling tunnel 400 through the cooling lifting mechanism 500 after passing through the high-temperature curing area 200, and the workpiece can be cooled to room temperature faster under the assistance of the cooling assembly, facilitating the transfer and handling of the workpiece, reducing the waiting time for cooling, and thus achieving the purpose of improving the capacity.

[0079] In the embodiment, the high-temperature curing area 200 and the cooling tunnel 400 are provided with temperature insulation materials.

[0080] In the embodiment, the pipeline is a high-temperature speed-up chain pipeline. The conveying principle is to use the speed-up function of the speed-up chain to make the tool plate supporting the goods run fast, and stop at the corresponding operation position through the stopper; or complete the accumulation, movement, indexing and line changing functions through corresponding instructions. Since the table plate conveying goods of the machine needs to be used repeatedly, it is rarely used alone, but is matched with various special machines such as the jacking and moving machine, the jacking and indexing machine, etc. to form a horizontal or vertical circulation system. It uses stainless steel forming matched with stainless steel profile processing to make special speed-up chain guide rails, so that the self-flowing conveying system has very good stability and durability in the conveying process in the high-temperature environment, and is suitable for mass production of products. At the same time, the flexible and diversified design of the self-flowing conveying system makes it have the characteristics of multi-function.

[0081] In the embodiment, the high-temperature speed-up chain pipeline uses chain as the traction and bearing body to convey materials. The chain can use 304 full stainless steel roller conveying chain, or other various special chains. In view of the working environment of the high-temperature tunnel in the high-temperature curing area 200, the high-temperature speed-up chain pipeline has the following advantages:

[0082] 1. Large conveying capacity, can bear larger load;

[0083] 2. Accurate and stable conveying speed, can ensure accurate synchronous conveying;

[0084] 3. Can work in high-temperature harsh environment, reliable performance;

[0085] 4. Made of stainless steel plate matched with stainless steel profile processing, wear-resistant and high-temperature-resistant;

[0086] 5. Low noise.

[0087] In the embodiment, the high-temperature curing area 200 includes a first high-temperature tunnel 600 and a second high-temperature tunnel 700, the second high-temperature tunnel 700 is located above the first high-temperature tunnel 600, and the cooling tunnel 400 is located below the first high-temperature tunnel 600. The pipelines in the first high-temperature tunnel 600, the second high-temperature tunnel 700 and the cooling tunnel 400 are of a rotary structure.

[0088] Among them, two high-temperature lifting mechanisms 300 and two cooling lifting mechanisms 500 are respectively located at both ends of the first high-temperature tunnel 600. The high-temperature lifting mechanism 300 makes reciprocating motion between the first high-temperature tunnel 600 and the second high-temperature tunnel 700, and the cooling lifting mechanism 500 makes reciprocating motion between the first high-temperature tunnel 600 and the cooling tunnel 400.

[0089] In the embodiment, the cooling tunnel 400 is located below the first high-temperature tunnel 600, and the heat exchange between the cooling tunnel 400 and the first high-temperature tunnel 600 is reduced by considering the convection characteristics of the upward rising of hot air and the downward falling of cold air, so as to improve the energy utilization rate.

[0090] In the embodiment, the pipelines in the first high-temperature tunnel 600, the second high-temperature tunnel 700 and the cooling tunnel 400 are in a rotary structure, forming three layers and six temperature zones, which greatly improves the number of workpieces that can be simultaneously heated and solidified. On the premise of ensuring the heating time of the workpieces, the transmission speed of the workpieces can be improved, so as to improve the production capacity. In the high-temperature solidification zone 200, the first high-temperature tunnel 600, the second high-temperature tunnel 700 and the rotary structure can not only realize the doubling of the transmission distance with less horizontal area, but also can provide production capacity. In addition, the number of high-temperature lifting mechanisms 300 can be saved, and the high-temperature lifting mechanisms 300 need not be arranged at both ends of the high-temperature tunnel, but only need to be arranged at one end, so as to achieve the purpose of cost control.

[0091] Referring to the accompanying drawings Figures 4-5 In the embodiment, the first high-temperature tunnel 600 includes a first pipeline 610 and a second pipeline 620, and the first pipeline 610 and the second pipeline 620 are arranged side by side.

[0092] The running directions of the first pipeline 610 and the second pipeline 620 are opposite, the first pipeline 610 corresponds to the inlet 120 of the high-temperature solidification zone 200, and the second pipeline 620 corresponds to the outlet 130 of the high-temperature solidification zone 200.

[0093] The driving direction of the first pipeline is from the inlet 120 to the high-temperature lifting mechanism 300, and the driving direction of the second pipeline 620 is from the high-temperature lifting mechanism 300 to the outlet 130.

[0094] The workpiece enters the first pipeline 610 of the first high-temperature tunnel 600 from the inlet, is conveyed along the pipeline to the high-temperature lifting mechanism 300, is then transported upward to the second high-temperature tunnel 700 by the high-temperature lifting mechanism 300, the second high-temperature tunnel 700 is in a rotary structure, the workpiece returns to the high-temperature lifting mechanism 300 through the rotation in the second high-temperature tunnel 700, is then lowered to the second pipeline 620 of the first high-temperature tunnel 600 by the high-temperature lifting mechanism 300, and is conveyed to the outlet 130 through the second pipeline 620. Therefore, the inlet 120 and the outlet 130 of the high-temperature solidification zone 200 are located on the same horizontal plane, which facilitates the feeding and discharging of the workpieces and facilitates the transfer of the workpieces to the cooling tunnel 400 by the cooling lifting mechanism 500.

[0095] Referring to the accompanying drawings Figures 6-10As shown, in the embodiment, the second high-temperature tunnel 700 includes a third flow line 710 and a fourth flow line 720 arranged side by side.

[0096] The third flow line 710 is located above the first flow line 610, and the direction of the third flow line 710 is opposite to that of the first flow line 610.

[0097] The fourth flow line 720 is located above the second flow line 620, and the direction of the fourth flow line 720 is opposite to that of the third flow line 710.

[0098] The first rail changing mechanism 730 is arranged at the other end of the second high-temperature tunnel 700 relative to the high-temperature lifting mechanism 300, and the first rail changing mechanism 730 spans the third flow line 710 and the fourth flow line 720, and is used to transfer the workpiece from the third flow line 710 to the fourth flow line 720.

[0099] The two high-temperature lifting mechanisms 300 are respectively located at the two ends of the first high-temperature tunnel 600, and the two high-temperature lifting mechanisms 300 correspond to the first flow line 610 and the second flow line 620 of the high-temperature tunnel respectively, that is, the workpiece of the first flow line 610 is lifted by the high-temperature lifting mechanism 300, and the workpiece of the fourth flow line 720 is lowered by the high-temperature lifting mechanism 300.

[0100] The movement direction of the workpiece is as follows:

[0101] In the initial state, the two high-temperature lifting mechanisms 300 are located in the same plane with the first flow line 610 and the fourth flow line 720.

[0102] The workpiece enters the first high-temperature tunnel 600 from the entrance 120 of the high-temperature curing area 200, and is transmitted along the first flow line 610 to the end of the first flow line 610, and then is lifted by the high-temperature lifting mechanism 300 to the second high-temperature tunnel 700. After the workpiece is transferred to the third flow line 710, the high-temperature lifting mechanism 300 is reset, and the workpiece is transmitted along the third flow line 710 away from the high-temperature lifting mechanism 300 to the first rail changing mechanism 730. The first rail changing mechanism 730 transfers the workpiece from the third flow line 710 to the fourth flow line 720, and the workpiece is transmitted along the fourth flow line 720 to the high-temperature lifting mechanism 300. Then, the high-temperature lifting mechanism 300 transfers the workpiece to the second flow line 620 of the first high-temperature tunnel 600, and finally the workpiece is transmitted from the second flow line 620 to the exit 130, that is, the workpiece completes the process flow of high-temperature curing.

[0103] Reference is made to the accompanying drawings Figure 8As shown, in the embodiment, the first rail changing mechanism 730 comprises a rail changing platform, a slide rail and a screw rod 332 transmission mechanism. The rail changing platform is provided with a chain transmission assembly, the transmission direction of which is parallel to and in the same plane as the third flow line 710 and the fourth flow line 720. The slide rail is fixed in the frame 100, and the direction of the slide rail is parallel to the third flow line 710 and the fourth flow line 720. The rail changing platform is slidingly installed on the slide rail, and the screw rod 332 mechanism is used to drive the rail changing platform to reciprocate between the third flow line 710 and the fourth flow line 720.

[0104] The movement direction of the workpiece in the second high-temperature tunnel 700 is as follows:

[0105] In the initial state, the first rail changing mechanism 730 is aligned with the third flow line 710, and the workpiece is transmitted along the third flow line 710. When the workpiece is transmitted to the end, the chain transmission assembly of the first rail changing mechanism 730 is rotated, the workpiece is transferred to the rail changing platform, and a sensor is triggered. The chain transmission assembly stops rotating, and then the screw rod 332 transmission mechanism drives the rail changing platform to displace laterally to be aligned with the fourth flow line 720 and trigger a sensor. The chain transmission assembly is reversely rotated to transfer the workpiece to the fourth flow line 720, and the rail changing rotation is completed.

[0106] Reference is made to the accompanying drawings Figures 11-14 As shown, in the embodiment, the cooling tunnel 400 comprises a fifth flow line 410 and a sixth flow line 420.

[0107] The fifth flow line 410 is located below the second flow line 620, and the transmission direction of the fifth flow line 410 is opposite to that of the second flow line 620.

[0108] The sixth flow line 420 is located below the first flow line 610, and the transmission direction of the sixth flow line 420 is opposite to that of the fifth flow line 410.

[0109] The other end of the cooling tunnel 400 relative to the cooling lifting mechanism 500 is provided with a second rail changing mechanism 430, which spans the fifth flow line 410 and the sixth flow line 420, and is used to transfer the workpiece from the fifth flow line 410 to the sixth flow line 420.

[0110] Two high-temperature lifting mechanisms 300 and two cooling lifting mechanisms 500 are respectively located at both ends of the first high-temperature tunnel 600, wherein the two high-temperature lifting mechanisms 300 correspond to the first flow line 610 and the second flow line 620 of the high-temperature tunnel respectively, that is, the workpieces of the first flow line 610 are lifted to the third flow line 710, and the workpieces of the fourth flow line 720 are lowered to the second flow line 620. The two cooling lifting mechanisms 500 correspond to the first flow line 610 and the second flow line 620 of the high-temperature tunnel respectively, that is, the workpieces at the outlet 130 are lifted to the fifth flow line 410, and the workpieces of the sixth flow line 420 are lifted to the inlet 120.

[0111] The structure and working principle of the second rail changing mechanism 430 are the same as those of the first rail changing mechanism 730, and will not be repeated.

[0112] The movement direction of the workpiece during cooling is as follows:

[0113] 1. In the initial state, the two cooling lifting mechanisms 500 correspond to the inlet 120 and the outlet 130 respectively.

[0114] 2. The workpiece first enters the high-temperature curing area 200 from the cooling lifting mechanism 500, and then passes through the first flow line 610, the high-temperature lifting mechanism 300, the third flow line 710, the first rail changing mechanism 730, the fourth flow line 720, the high-temperature lifting mechanism 300 and the second flow line 620 to the outlet, and is transferred to the cooling lifting mechanism 500.

[0115] 3. The cooling lifting mechanism 500 is lowered, and the workpiece is transferred to the fifth flow line 410 of the cooling tunnel 400. The workpiece is transmitted on the fifth flow line 410, passes through the cooling tunnel 400 to the second rail changing mechanism 430, and the working principle of the second rail changing mechanism 430 is the same as that of the first rail changing mechanism 730. The second rail changing mechanism 430 spans the fifth flow line 410 and the sixth flow line 420, and the workpiece is transferred to the sixth flow line 420 through the second rail changing mechanism 430. The workpiece is transmitted along the sixth flow line 420 to the cooling lifting mechanism 500.

[0116] 4. At the same time, the cooling lifting mechanism 500 is lowered to receive the workpiece flowing out of the sixth flow line 420 and is reset. The workpiece waits for unloading.

[0117] In the embodiment, a mechanical arm 900 is further included. The grabbing end of the mechanical arm 900 can reciprocate directly between the cooling lifting mechanism 500 and the outside world. The mechanical arm 900 is used for loading and unloading the workpiece. The mechanical arm 900 is close to one side of the inlet 120.

[0118] When loading, the cooling lifting mechanism 500 is aligned with the outlet 130, and the mechanical arm 900 grabs the workpiece to the cooling lifting mechanism 500.

[0119] When discharging, the cooling lifting mechanism 500 is lowered first, receives the workpiece passing through the cooling tunnel 400, and is reset to be aligned at the outlet 130. The mechanical arm 900 grabs the workpiece to the outside, and the discharging is completed.

[0120] Referring to the drawings Figures 15-18 In the embodiment, the high-temperature lifting mechanism 300 includes a vertical installation side plate 310, a connection mechanism 320 slidingly installed between the two side plates 310, and a lifting mechanism 330 driving the connection mechanism 320 to lift.

[0121] A base 321 is provided with a through slot along the workpiece transmission direction;

[0122] A driving shaft 322 and a driven shaft 323 are rotatably installed between the side walls of the through slot;

[0123] A sprocket 324 is provided on the two ends of the driving shaft 322 and the driven shaft 323 close to the side walls of the through slot;

[0124] A transmission chain is provided on the sprocket 324 at the two ends of the driving shaft 322 and the driven shaft 323, and the transmission chain is used to support the workpiece;

[0125] A connection motor 326 is fixed on the side of the base 321, and is used to drive the driving shaft 322 to rotate.

[0126] In the multi-layer tunnel furnace, the original narrow tunnel transmission mechanism is divided into multiple segments and overlapped in space, and the transmission belt is used to replace the original narrow structure. When the workpiece is baked, the high-temperature lifting device is used to transfer the workpiece to the transmission belt device at different heights.

[0127] When the workpiece is conveyed to the end, the connection motor 326 drives the driving shaft 322 to rotate, the driving shaft 322 drives the driven shaft 323 to rotate synchronously through the transmission chain, the workpiece is transferred to the high-temperature lifting device through the transmission chain, and then the lifting mechanism 330 drives the connection mechanism 320 to lift to another layer, and then the connection motor 326 is reversed to transfer the workpiece to the transmission belt through the transmission chain.

[0128] In the embodiment, the driven shaft 323 adjusts the distance between the driven shaft 323 and the driving shaft 322 through the distance adjusting nut, so as to adjust the tightness of the transmission chain.

[0129] In the embodiment, the side wall of the through slot is provided with a chain drag plate for supporting the transmission chain. In order to improve the displacement problem of the workpiece during transfer, improve the load capacity of the transmission chain, and reduce the inclination and up-down displacement shaking of the workpiece during transfer caused by the tightness of the chain.

[0130] In the embodiment, the transmission chain is a double-row chain. The transmission stability of the double-row chain is better, the contact area with the workpiece is larger, the load capacity is higher, and it is suitable for stable load transfer in high temperature environment.

[0131] In the embodiment, the through slot is provided with a guide slope at one end close to the outer transmission belt, and the other end is provided with a block. The guide slope facilitates the angle adjustment of the workpiece during transfer, facilitates the alignment to reduce the jam, and the block serves as a safeguard to prevent the workpiece from falling during electronic failure, avoiding significant damage caused by the workpiece falling through the connection structure.

[0132] In the embodiment, the connection motor 326 is a speed-regulating right-angle hollow high-temperature motor. The working environment temperature of the high-temperature resistant lifting device is relatively high, and the high-temperature stability of ordinary motors is poor, and the maintenance requirement is large in the later period. The horizontal land area of the right-angle hollow high-temperature motor is smaller, the structure is compact, and the hollow motor has the advantages of small noise, high temperature resistance, low maintenance requirement, etc.

[0133] In the embodiment, the lifting mechanism 330 includes a lifting motor 331, a lead screw 332, and a lifting platform 333. The lifting platform 333 is slidingly installed between the two side plates 310 for supporting the connection mechanism 320. The lead screw 332 is vertically installed. The lifting platform 333 is threadedly connected to the lead screw 332 through the lead screw 332 seat. The lifting motor 331 is used to drive the lifting platform 333 to move up and down through the lead screw 332.

[0134] In the actual assembly process, the lifting motor 331 is a stepping motor, which is convenient for precise control of the lifting height of the connection structure. The lifting motor 331 is installed on the outside of the top end of the tunnel furnace, i.e. the outside of the heat preservation layer 110, and is connected with the lead screw 332 through a shaft coupling mechanism penetrating the heat preservation layer 110, to ensure the stability of the work of the lifting motor 331.

[0135] The lifting motor 331 drives the lifting platform 333 to lift through the lead screw 332. The lifting platform 333 is fixedly connected with the base 321 of the connection mechanism 320 for supporting the connection mechanism 320, to realize synchronous lifting.

[0136] In the embodiment, two sides of the lifting platform 333 are provided with fixed roller groups, which abut the inner sides of the side plates 310 to limit the degrees of freedom of the lifting platform 333. In order to improve the load capacity of the high-temperature-resistant lifting device and reduce shaking, tilting and other conditions during lifting, the fixed roller groups abut the inner sides of the side walls on both sides to limit the degrees of freedom of the lifting platform 333, thereby improving the stability during lifting.

[0137] In the embodiment, the surfaces of the side walls are vertically provided with guide rails, and the rollers of the fixed roller groups are provided with limiting grooves matched with the guide rails. In order to further improve the stability of lifting and reduce transverse displacement and shaking, the guide rails are located in the limiting grooves of the rollers to limit the degrees of freedom of the lifting platform 333, thereby reducing horizontal displacement and shaking and ensuring the stability of the operation of the lead screw 332.

[0138] In the embodiment, the limiting roller group is further included, the rollers of the limiting roller group are connected with the outer sides of the side plates 310, and the limiting roller group and the fixed roller group are slidingly connected to clamp the side plates 310. The sliding groups of the limiting roller group and the fixed roller group are adjusted in spacing by the adjusting screw, the limiting roller group and the fixed roller group clamp the side plates 310 in cooperation, thereby reducing horizontal shaking and displacement of the lifting platform 333, ensuring the stability of lifting, improving displacement progress, reducing shaking of the lead screw 332 and improving reliability.

[0139] In the embodiment, the cooling lifting mechanism 500 includes a base 321, a lifting cylinder, a lifting platform 333 and a connection mechanism 320.

[0140] The lifting platform 333 is slidingly installed on the base 321 through a sliding rail, the lifting platform 333 is connected with the telescopic rod of the lifting cylinder, and the cylinder is used to drive the lifting platform 333 to make lifting reciprocating motion.

[0141] The connection mechanism 320 is fixed on the lifting platform 333 and is used to transfer workpieces.

[0142] The connection mechanism 320 includes a base 321, a driving shaft 322, a driven shaft 323, a sprocket 324, a transmission chain, and a connection motor 326. The base 321 is provided with a through groove along the transmission direction of the workpiece, the driving shaft 322 and the driven shaft 323 are rotatably installed between the side walls of the through groove, the sprockets 324 are sleeved on the two ends of the driving shaft 322 and the driven shaft 323 close to the side walls of the through groove, the transmission chain is sleeved on the sprockets 324 on the two ends of the driving shaft 322 and the driven shaft 323, the transmission chain is used to support the workpiece, and the connection motor 326 is fixed on the side of the base 321 and is used to drive the driving shaft 322 to rotate.

[0143] The working principle of the cooling lifting mechanism 500 is similar to that of the high-temperature lifting mechanism 300, and the difference lies in that the working environment of the high-temperature lifting mechanism 300 is relatively harsh, and a screw rod 332 assembly is used for driving, but the cost is relatively high. The cooling lifting mechanism 500 uses a cylinder for driving, and the cost is relatively low.

[0144] In the embodiment, the first flow line 610, the second flow line 620, the third flow line 710, the fourth flow line 720, the fifth flow line 410 and the sixth flow line 420 are each provided with a blocking cylinder 800 at the end of the transmission direction. For controlling the release of the workpiece. That is, when the high-temperature lifting mechanism 300 or the first rail changing mechanism 730 or the second rail changing mechanism 430 or the cooling lifting mechanism 500 starts to work, the blocking cylinder 800 on the corresponding flow line is raised to block the subsequent cylinder from moving forward. When the high-temperature lifting mechanism 300 or the first rail changing mechanism 730 or the second rail changing mechanism 430 or the cooling lifting mechanism 500 is reset, the blocking cylinder 800 on the corresponding flow line is lowered to release the workpiece.

[0145] Reference is made to the accompanying drawings Figure 19 As shown in the figure, the working process is as follows:

[0146] 1. The mechanical arm 900 transfers the workpiece and the drag plate to the cooling lifting mechanism 500 corresponding to the inlet 120, and completes the feeding;

[0147] 2. The connecting mechanism 320 of the cooling lifting mechanism 500 cooperates with the first flow line 610 to transfer the workpiece to the first flow line 610, that is, to enter the high-temperature curing area 200, and to perform the high-temperature curing process;

[0148] 3. The workpiece is transmitted along the first flow line 610 to the high-temperature lifting mechanism 300, and at the same time, the blocking cylinder 800 at the end of the first flow line 610 is raised to block the subsequent workpiece;

[0149] 4. The high-temperature lifting mechanism 300 transfers the workpiece to the third flow line 710 and resets;

[0150] 5. The workpiece moves along the third flow line 710 to the first rail changing mechanism 730;

[0151] 6. The first rail changing mechanism 730 transversely changes the rail to transfer the workpiece to the fourth flow line 720 and resets;

[0152] 7. The workpiece is transmitted along the fourth rail changing mechanism to the corresponding high-temperature lifting mechanism 300;

[0153] 8. The high-temperature lifting mechanism 300 lowers to transfer the workpiece to the second flow line 620 and resets;

[0154] 9. The workpiece is transported along the second assembly line 620 to the cooling lifting mechanism 500 at the exit 130, i.e. leaves the high-temperature curing area 200, and completes the high-temperature curing process;

[0155] 10. The corresponding cooling lifting mechanism 500 is lowered, and the workpiece is transported to the fifth assembly line 410 and reset, i.e. the workpiece enters the cooling tunnel 400 and enters the heat dissipation process;

[0156] 11. The workpiece is transported along the fifth assembly line 410 to the second rail-changing mechanism 430;

[0157] 12. The second rail-changing mechanism 430 is laterally displaced to transport the workpiece to the sixth assembly line 420 and reset;

[0158] 13. The workpiece is transported along the sixth assembly line 420, and the corresponding cooling lifting mechanism 500 is lowered. The workpiece is transported to the cooling lifting mechanism 500, and the cooling lifting mechanism 500 is reset to correspond to the exit 130, i.e. the cooling process of the workpiece is completed;

[0159] 14. The mechanical arm 900 grabs the workpiece to the outside to complete the discharging.

[0160] In the scheme, the workpiece positioning sensors of the first assembly line 610, the second assembly line 620, the third assembly line 710, the fourth assembly line 720, the fifth assembly line 410 and the sixth assembly line 420 are standard and have no special requirements, and can be mechanical, photoelectric or pressure type, which are used to control the high-temperature lifting mechanism 300 or the first rail-changing mechanism 730 or the second rail-changing mechanism 430 or the cooling lifting mechanism 500 or the blocking cylinder 800.

[0161] The above process is the processing process of a single workpiece. By repeating the above steps, multiple workpieces can be processed at the same time. Compared with a single-tunnel tunnel furnace, the multi-layer and multi-tunnel design of the scheme greatly improves the space utilization and production efficiency. The high-temperature curing area 200 is composed of two or more high-temperature tunnels stacked together. Without increasing the floor area, the actual tunnel length can be doubled, the workpiece transmission speed can be increased, and the production capacity can be improved. In order to improve the stability of work under high-temperature environment, the conveying belt adopts a speed-up chain, the connecting mechanism 320 adopts chain transmission, and the high-temperature lifting device adopts a motor-external screw rod 332 transmission, which reduces the maintenance cost and improves the stability. The cooling tunnel 400 is additionally provided. The workpiece passes through the high-temperature curing area 200 and then passes through the cooling channel to restore the surface temperature of the workpiece to near room temperature, which does not affect the discharging and handling of the workpiece and helps to improve the production capacity. The assembly lines in the first high-temperature tunnel 600, the second high-temperature tunnel 700 and the cooling tunnel 400 are rotary structures, forming three layers and six temperature zones, which greatly improves the number of workpieces that can be heated and cured at the same time. Under the premise of ensuring the heating time of the workpiece, the transmission speed of the workpiece can be improved, thereby achieving the effect of improving the production capacity.

[0162] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be replaced by equivalent features. Any modifications, equivalent replacements, improvements, and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-tiered tunnel furnace characterized by, include: The frame (100) is covered with an insulation layer (110). The high-temperature curing zone (200) is fixed inside the frame (100). The high-temperature curing zone (200) is composed of two or more high-temperature tunnels stacked together. The high-temperature tunnels are equipped with a production line and heating components. The high-temperature lifting mechanism (300) is fixed inside the frame (100) at the end of the high-temperature tunnel and is used to transfer workpieces between different high-temperature tunnels. A cooling tunnel (400) is located below the high-temperature curing zone (200), and the high-temperature tunnel is equipped with a production line and cooling components; The cooling lifting mechanism (500) is fixed outside the frame (100) and located at the other end of the high temperature tunnel opposite to the first lifting mechanism. It is used to transfer the workpiece in the high temperature curing zone (200) to the cooling tunnel (400). Among them, the insulation layer (110) at the entrance (120) and exit (130) of the high temperature curing zone (200) is provided with a gap, and the gap of the insulation layer (110) is provided with an insulation door. The insulation door is driven to reciprocate by a telescopic mechanism. The production lines in the first high temperature tunnel, the second high temperature tunnel and the cooling tunnel are arranged in parallel, and the two parallel production lines form a rotary structure through a track changing mechanism, so that the tunnel furnace forms three layers and six temperature zones. The high-temperature curing zone (200) includes a first high-temperature tunnel (600) and a second high-temperature tunnel (700). The second high-temperature tunnel (700) is located above the first high-temperature tunnel (600), and the cooling tunnel (400) is located below the first high-temperature tunnel (600). The flow lines in the first high-temperature tunnel (600), the second high-temperature tunnel (700), and the cooling tunnel (400) are rotary structures. The two high-temperature lifting mechanisms (300) and the two cooling lifting mechanisms (500) are located at both ends of the first high-temperature tunnel (600). The high-temperature lifting mechanism (300) reciprocates between the first high-temperature tunnel (600) and the second high-temperature tunnel (700), and the cooling lifting mechanism (500) reciprocates between the first high-temperature tunnel (600) and the cooling tunnel (400).

2. The multi-tiered tunnel furnace of claim 1, wherein, The production line is a high-temperature, high-speed chain production line.

3. The multi-tiered tunnel furnace of claim 1, wherein, It also includes a robotic arm (900), the gripping end of which can reciprocate directly between the cooling lifting mechanism (500) and the outside world. The robotic arm (900) is used for loading and unloading workpieces.

4. The multi-tiered tunnel furnace of claim 1, wherein, The first high-temperature tunnel (600) includes a first production line (610) and a second production line (620), which are arranged side by side; The first production line (610) and the second production line (620) operate in opposite directions. The first production line (610) is at the entrance (120) of the corresponding high-temperature curing zone (200), and the second production line (620) is at the exit (130) of the corresponding high-temperature curing zone (200). The transmission direction of the first pipeline is from the entrance (120) to the high-temperature lifting mechanism (300), and the transmission direction of the second pipeline (620) is from the high-temperature lifting mechanism (300) to the exit (130).

5. The multi-tiered tunnel furnace of claim 4, wherein, The second high-temperature tunnel (700) comprises a third pipeline (710) and a fourth pipeline (720) arranged side by side; The third pipeline (710) is located above the first pipeline (610), and the direction of the third pipeline (710) is opposite to that of the first pipeline (610); The fourth pipeline (720) is located above the second pipeline (620), and the direction of the fourth pipeline (720) is opposite to that of the third pipeline (710); The first rail changing mechanism (730) is arranged at the other end of the second high-temperature tunnel (700) relative to the high-temperature lifting mechanism (300), the first rail changing mechanism (730) spans the third pipeline (710) and the fourth pipeline (720), and the first rail changing mechanism (730) is used for transferring the workpiece from the third pipeline (710) to the fourth pipeline (720).

6. The multi-tiered tunnel furnace of claim 5, wherein, The cooling tunnel (400) comprises a fifth pipeline (410) and a sixth pipeline (420); The fifth pipeline (410) is located below the second pipeline (620), and the transmission direction of the fifth pipeline (410) is opposite to that of the second pipeline (620); The sixth pipeline (420) is located below the first pipeline (610), and the transmission direction of the sixth pipeline (420) is opposite to that of the fifth pipeline (410); The second rail changing mechanism (430) is arranged at the other end of the cooling tunnel (400) relative to the cooling lifting mechanism (500), the second rail changing mechanism (430) spans the fifth pipeline (410) and the sixth pipeline (420), and the second rail changing mechanism (430) is used for transferring the workpiece from the fifth pipeline (410) to the sixth pipeline (420).

7. The multi-tiered tunnel furnace of claim 1, wherein, The high-temperature lifting mechanism (300) comprises vertically arranged side plates (310), a connecting mechanism (320) slidingly arranged between the two side plates (310), and a lifting mechanism (330) driving the connecting mechanism (320) to lift, and the connecting mechanism (320) comprises: a base (321) provided with a through slot in the transmission direction of the workpiece; a driving shaft (322) and a driven shaft (323) rotatably arranged between the side walls of the through slot; a chain wheel (324) arranged at the two ends of the driving shaft (322) and the driven shaft (323) close to the side walls of the through slot; a transmission chain arranged on the chain wheels (324) at the two ends of the driving shaft (322) and the driven shaft (323), the transmission chain being used for supporting the workpiece; a connecting motor (326) fixed to the side of the base (321) and used for driving the driving shaft (322) to rotate.

8. The multi-tiered tunnel furnace of claim 7, wherein, The lifting mechanism (330) comprises a lifting motor (331), a lead screw (332) and a lifting platform (333), the lifting platform (333) is slidingly installed between the two side plates (310) for supporting the adapter mechanism (320), the lead screw (332) is vertically installed, the lifting platform (333) is threadedly connected with the lead screw (332) through a lead screw (332) seat, and the lifting motor (331) is used for driving the lifting platform (333) to move up and down through the lead screw (332).

9. The multi-tiered tunnel furnace of claim 1, wherein, The cooling lifting mechanism (500) comprises a base (321), a lifting cylinder, a lifting platform (333) and an adapter mechanism (320). The lifting platform (333) is slidingly installed on the base (321) through a sliding rail, the lifting platform (333) is connected with a telescopic rod of the lifting cylinder, and the cylinder is used for driving the lifting platform (333) to reciprocatingly move up and down. The adapter mechanism (320) is fixed on the lifting platform (333) and is used for transferring workpieces. The adapter mechanism (320) comprises a base (321), a driving shaft (322), a driven shaft (323), a chain wheel (324), a transmission chain, an adapter motor (326), the base (321) is provided with a through groove in the workpiece transmission direction, the driving shaft (322) and the driven shaft (323) are rotatably installed between the side walls of the through groove, chain wheels (324) are arranged on the two ends of the driving shaft (322) and the driven shaft (323) close to the side walls of the through groove, the transmission chain is arranged on the chain wheels (324) at the two ends of the driving shaft (322) and the driven shaft (323), respectively, the transmission chain is used for supporting the workpiece, and the adapter motor (326) is fixed on the side of the base (321) and is used for driving the driving shaft (322) to rotate.

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