A high temperature resistant metal mesh belt conveyor for tunnel furnace and its conveying process
By designing a high-temperature resistant metal mesh belt conveyor for tunnel furnaces, the flow of exhaust gas is accelerated by using the opening and closing components and the flow rotating wing, the problems of high-temperature waste gas retention and return are solved, the service life of the metal mesh belt is extended, and the energy consumption is reduced.
Patent Information
- Application Number
- CN202411990970.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-04
AI Technical Summary
The large amount of high-temperature exhaust gas generated by the tunnel furnace during the heating process poses a severe challenge to the metal mesh belt. The traditional exhaust gas emission method causes the waste gas to remain and return, increasing the thermal impact of the metal mesh belt and affecting its service life.
A high-temperature resistant metal mesh belt conveying device for tunnel furnaces is designed, including a heat source conveying unit, an exhaust gas discharge unit and an opening and closing assembly. The opening and closing assembly automatically opens when heated, and the exhaust gas accelerates flow through the opening and closing assembly and the flow rotating wing in the L-shaped branch pipe to avoid the return of the exhaust gas.
By automatically adjusting the size of the exhaust gas channel and the design of the fluid rotary wing, the smooth emission of exhaust gas is achieved, the thermal impact of the metal mesh belt is reduced, the service life of the metal mesh belt is extended, and air preheating is achieved through the heat exchange device, reducing energy consumption.
Smart Images
Figure CN119755970A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of conveying equipment, and in particular to a high temperature resistant metal mesh belt conveying device for a tunnel furnace and a conveying process thereof. Background Art
[0002] In the heating operation of the tunnel furnace, the metal mesh belt conveyor is a key component for carrying and conveying materials. Its performance and life directly affect the overall operating efficiency and production cost of the tunnel furnace. However, the large amount of high-temperature exhaust gas generated by the tunnel furnace during the heating process poses a severe challenge to the metal mesh belt.
[0003] Traditional exhaust gas discharge methods, such as connecting the main pipe and the exhaust fan through an L-shaped pipe, can discharge exhaust gas to a certain extent, but due to the bending of the pipe and the large resistance, not only the exhaust fan has high energy consumption, but the exhaust gas will be greatly hindered during the transportation process, resulting in a decrease in flow rate and an increase in pressure. This change in pressure and a decrease in flow rate will increase the retention time of the exhaust gas in the pipe, and some of the exhaust gas may even re-contact the metal mesh belt due to the reflux phenomenon. Due to the extremely high temperature of the exhaust gas, this direct contact will cause additional thermal shock to the metal mesh belt, affecting the service life of the metal mesh belt. Summary of the invention
[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a high temperature resistant metal mesh belt conveyor for a tunnel furnace, mainly comprising:
[0006] The tunnel furnace body comprises a feeding section, a heating section, a discharging section and a metal mesh belt, wherein the heating section is arranged between the feeding section and the discharging section, and the metal mesh belt runs through the entire furnace body and is used to transport the material to be heated from the feeding section to the discharging section;
[0007] A heat source conveying unit, which is arranged on the top of the tunnel furnace body and is used to convey the heat source to the material to be heated on the metal mesh belt;
[0008] An exhaust gas discharge unit is arranged on the top of the tunnel furnace body, and includes an exhaust fan fixedly connected to the top of one end of the tunnel furnace body, a filter fixedly connected to the air inlet end of the exhaust fan, a heat exchange device fixedly connected to the air inlet end of the filter, a main pipe fixedly connected to the air inlet of the heat exchange device, and a plurality of inverted L-shaped branches fixedly connected to one side of the main pipe, wherein an opening and closing component and an exhaust gas flow assisting component are arranged in the L-shaped branch pipe, and the opening and closing component is connected to the exhaust gas flow assisting component.
[0009] As a preferred solution of the high-temperature resistant metal mesh belt conveying device for the tunnel furnace described in the present invention, the tunnel furnace body also includes an electric heating pipe, which is arranged in the heating section inside the tunnel furnace body and located on both sides of the metal mesh belt to provide a heat source to heat the material in the tunnel furnace body.
[0010] As a preferred solution of the high-temperature resistant metal mesh belt conveyor for the tunnel furnace described in the present invention, the tunnel furnace body also includes a pair of air curtain machines, which are respectively installed on the upper parts of the two ends of the tunnel furnace body to form a protective barrier, which can effectively block external impurities from entering the tunnel furnace body and prevent harmful gases and heat inside the tunnel furnace body from diffusing outward.
[0011] As a preferred solution of the high-temperature resistant metal mesh belt conveying device for the tunnel furnace of the present invention, four heat source conveying units are arranged at equal intervals, and the heat source conveying units include a bracket fixedly connected to the top of the tunnel furnace body, a fan is fixedly connected to the top of the bracket, and the output shaft at the bottom of the fan is movably inserted into the interior of the tunnel furnace body and fixedly connected to fan blades.
[0012] As a preferred solution of the high-temperature resistant metal mesh belt conveyor for the tunnel furnace of the present invention, the heat exchange device is provided with a fresh air inlet and a fresh air outlet, and the external fresh air enters the heat exchange device through the fresh air inlet and performs heat exchange with the exhaust gas barrier, the fresh air outlet of the heat exchange device is fixedly connected to an exhaust pipe, a backflow prevention valve is installed on the exhaust pipe, and one end of the exhaust pipe away from the heat exchange device extends to the interior of the tunnel furnace body and corresponds to the electric heating pipe.
[0013] As a preferred solution of the high-temperature resistant metal mesh belt conveying device for the tunnel furnace described in the present invention, wherein: the opening and closing component is arranged in the vertical pipe of the L-shaped branch pipe, the opening and closing component includes a plurality of alternately arranged fixed plates and movable plates, and the fixed plate and the movable plate form a circle with good sealing performance, and the circle is adapted to the inside of the L-shaped branch pipe, the fixed plate is fixedly connected to the inner wall of the L-shaped branch pipe, the movable plate is sealed and slidably connected to the inner wall of the L-shaped branch pipe and the fixed plate, the bottom of each of the movable plates is fixedly connected to a spring, the bottom end of the spring is fixedly connected to a connecting plate, one side of the connecting plate is fixedly connected to the inner wall of the L-shaped branch pipe, the top of the movable plate is fixedly connected to an opening adjustment drive component, and the opening adjustment drive component is connected to the exhaust gas flow assist component.
[0014] As a preferred solution of the high-temperature resistant metal mesh belt conveyor for a tunnel furnace described in the present invention, the opening adjustment driving member includes a plurality of support rods fixedly connected to the top of each movable plate respectively, the tops of the plurality of support rods are fixedly connected to the same base, the top of the base is fixedly connected to a vertically arranged double-sided rack, one side of the double-sided rack is meshed with a first gear, the opposite side of the double-sided rack is meshed with a second gear, a synchronization shaft is fixedly connected at the center of the second gear, an end of the synchronization shaft away from the second gear is fixedly connected to a third gear, one side of the third gear is meshed with a first steering gear, and the side of the first steering wheel away from the third gear is meshed with a second steering gear, the first gear and the second steering gear are both connected to an exhaust gas flow assisting component, the outside of the synchronization shaft is rotatably connected to a stable bracket through a bearing, the bottom end of the stable bracket is fixedly connected to the top of the synchronization shaft, a fixed shaft is fixedly connected at the center of the first steering gear, and an end of the fixed shaft away from the first steering gear is rotatably connected to the stable bracket.
[0015] As a preferred solution of the high temperature resistant metal mesh belt conveyor for the tunnel furnace of the present invention, wherein: the exhaust gas flow assisting assembly is arranged in the transverse pipe of the L-shaped branch pipe, the exhaust gas flow assisting assembly comprises a fixed plate adapted and fixedly connected to the inside of the L-shaped branch pipe, a movable plate movably fitted with a side of the fixed plate facing the double-sided rack, a flow force rotating wing arranged on a side of the fixed plate away from the movable plate, and a rotating shaft fixedly connected to the center of a side of the movable plate away from the fixed plate, one end of the flow force rotating wing movably passes through the fixed plate and is fixedly connected to the center of the movable plate, the first gear and the second steering gear are both connected to the rotating shaft through a one-way bearing, and the working directions of the two one-way bearings are the same;
[0016] A plurality of first air flow holes are evenly distributed on the fixed disk, and a plurality of second air flow holes are evenly distributed on the movable disk. When the movable disk is not in an ascending state, the plurality of second air flow holes and the plurality of first air flow holes are staggered to ensure that they do not overlap with each other. When the movable disk rises and the double-sided rack moves upward together, the movable disk rotates, so that the overlapping area of the second air flow holes and the first air flow holes thereon continues to expand.
[0017] As a preferred solution of the high-temperature resistant metal mesh belt conveyor for the tunnel furnace described in the present invention, the flow rotating wing includes a connecting shaft, and the end of the connecting shaft away from the fixed disk is rotatably connected with an airfoil blade through a one-way bearing, wherein the one-way bearing has the same working direction as the one-way bearings on the first gear and the second steering gear, the other end of the connecting shaft movably passes through the fixed disk and is fixedly connected to the center of the movable disk, and the connecting shaft is rotatably connected to the fixed disk through a bearing.
[0018] The conveying process using the above high temperature resistant metal mesh belt conveyor for a tunnel furnace includes the following steps:
[0019] Step 1: At the initial stage, the material to be heated is placed on the metal mesh belt of the feeding section. Subsequently, the metal mesh belt carries the material through the tunnel furnace body for heating treatment, and finally outputs the heated material from the discharging section;
[0020] Step 2: During the material conveying process, if the air pressure inside the tunnel furnace body gradually accumulates and exceeds the preset threshold of the spring, the movable plate will be pushed open, and the exhaust gas will be discharged through the gap formed between the movable plate and the fixed plate and enter the L-shaped branch pipe. It is worth noting that the width of the gap is related to the air pressure. The greater the air pressure, the wider the gap.
[0021] Step 3: When the movable plate is pushed open, the support rod and the base connecting the movable plate drive the double-sided rack to rise, and the rising movement of the double-sided rack drives the first gear and the second gear meshing with it to rotate forward and reverse respectively; when the first gear rotates forward, the one-way bearing on the first gear works, driving the rotating shaft and the movable disk fixed thereto to rotate forward, and the movable disk drives the flow rotating wing fixedly connected thereto to rotate forward, and as the movable disk rotates, the overlapping area of the second air flow hole and the first air flow hole gradually increases, and the size of the overlapping area depends on the opening size of the movable plate, and the overlapping part is used for the exhaust gas to pass through; the forward rotation of the flow rotating wing accelerates the flow of the exhaust gas, and when the exhaust gas passes through the airfoil blades, part of the kinetic energy is transmitted to the airfoil blades, causing them to rotate, so that the exhaust gas flow can be continuously accelerated when the movable disk does not rotate;
[0022] The reverse rotation of the second gear transmits power to the third gear through the synchronizing shaft, and the third gear transmits power to the second steering gear through the first steering gear, so that the second steering gear rotates in the reverse direction. Since the one-way bearing on the second steering gear does not work, the reverse rotation of the second steering gear does not affect the forward rotation state of the rotating shaft.
[0023] Step 4: As the air pressure inside the tunnel furnace body gradually decreases, the movable plate slowly descends and resets under the action of the spring's rebound force. This action causes the double-sided rack to descend, thereby causing the first gear and the second gear to rotate in the reverse and forward directions respectively. At this time, the one-way bearing on the first gear does not work, so the rotating shaft does not rotate in the reverse direction with it. When the second gear rotates forward, the second steering gear rotates forward, and the one-way bearing on the second steering gear works to transmit the rotational force to the rotating shaft, so that the rotating shaft can only rotate in the forward direction, thereby ensuring that the airfoil blades can stably transport airflow;
[0024] Step 5: After the exhaust gas enters the main pipe, it is transported to the heat exchange device for heat recovery under the drive of the exhaust fan. The exhaust gas after heat recovery is filtered through the filter and finally discharged into the working environment. In addition, the external fresh air enters the heat exchange device through the fresh air inlet on the heat exchange device to exchange heat with the exhaust gas barrier to achieve air preheating. The preheated air enters the exhaust pipe through the fresh air outlet on the heat exchange device, and then is discharged from the exhaust pipe to the electric heating pipe for reheating, thereby achieving energy-saving effect.
[0025] Beneficial effects of the present invention:
[0026] 1. In the present invention, the movable plate automatically opens when subjected to thermal shock from the inside of the tunnel furnace body, allowing high-temperature exhaust gas to enter the L-shaped branch pipe. While the movable plate rises and opens, the support rod and base connecting the movable plate drive the double-sided rack to rise. The rising movement of the double-sided rack drives the first gear and the second gear meshed with it to rotate forward and reverse respectively, thereby rotating the movable disk. As the movable disk rotates, the overlapping area of the second air flow hole and the first air flow hole gradually increases. The size of the overlapping area depends on the degree of opening of the movable plate, that is, when the movable plate is opened more by thermal shock, the overlapping area increases accordingly, and vice versa. This design makes the overlapping area the main channel for exhaust gas to pass through, and the size of the channel can be automatically adjusted according to actual conditions, ensuring the smooth discharge of exhaust gas and avoiding overheating or damage to equipment caused by exhaust gas accumulation.
[0027] 2. In the present invention, when the first gear rotates forward, the flow rotating wing rotates accordingly. The forward rotation of the flow rotating wing accelerates the flow of the exhaust gas, so that the exhaust gas quickly passes through the overlap of the second air flow hole and the first air flow hole, and when the exhaust gas passes through the airfoil fan blade, part of the kinetic energy is transmitted to the airfoil fan blade, causing it to rotate, thereby further accelerating the flow of the exhaust gas. In addition, when the movable disk does not rotate, the self-rotation of the airfoil fan blade can continuously accelerate the flow of the exhaust gas, reduce the resistance and residence time of the exhaust gas during the transportation process, thereby effectively avoiding thermal shock on the metal mesh belt. As the air pressure inside the tunnel furnace body gradually decreases, the movable plate slowly descends and resets under the action of the rebound force, and the first gear and the second gear rotate in the reverse and forward directions respectively. At this time, the one-way bearing on the first gear does not work, so the rotating shaft does not rotate in the reverse direction with it. When the second gear rotates forward, the second steering gear rotates forward, and the one-way bearing on the second steering gear works to transmit the rotational force to the rotating shaft, so that the rotating shaft can only rotate in the forward direction. Therefore, in the process of the movable plate gradually descending, the flow force rotating wing will not be reversed, thereby ensuring that the airfoil fan blades can stably transport the airflow, and exhaust gas reflux is not likely to occur, thereby further avoiding exhaust gas reflux and helping to extend the service life of the metal mesh belt. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:
[0029] Figure 1 It is a schematic diagram of the overall structure of a high temperature resistant metal mesh belt conveyor for a tunnel furnace of the present invention.
[0030] Figure 2 It is a schematic structural diagram of a waste gas discharge unit of a high temperature resistant metal mesh belt conveyor for a tunnel furnace of the present invention.
[0031] Figure 3 It is a schematic diagram of the internal structure of an L-shaped branch pipe of a high-temperature resistant metal mesh belt conveyor for a tunnel furnace of the present invention.
[0032] Figure 4 It is a schematic diagram of the connection structure of an opening and closing component and an exhaust gas flow assisting component of a high-temperature resistant metal mesh belt conveyor device for a tunnel furnace of the present invention.
[0033] Figure 5 This is a first-view structural schematic diagram of an exhaust gas flow assisting component of a high-temperature resistant metal mesh belt conveyor for a tunnel furnace of the present invention.
[0034] Figure 6 It is a second perspective structural schematic diagram of an exhaust gas flow assisting component of a high temperature resistant metal mesh belt conveying device for a tunnel furnace of the present invention.
[0035] Figure 7 It is a structural schematic diagram of the opening and closing components of a high-temperature resistant metal mesh belt conveyor for a tunnel furnace of the present invention.
[0036] Figure 8 It is a schematic diagram of the partial structure of the opening and closing components when the movable plate of the high-temperature resistant metal mesh belt conveyor device for a tunnel furnace of the present invention is opened.
[0037] Fig. 9 It is a partial structural schematic diagram of an opening adjustment driving component of a high temperature resistant metal mesh belt conveyor for a tunnel furnace of the present invention.
[0038] In the figure: 100, tunnel furnace body; 101, feeding section; 102, heating section; 103, discharging section; 104, metal mesh belt; 105, air curtain machine; 200, heat source conveying unit; 300, exhaust gas discharge unit; 301, exhaust fan; 302, filter; 303, heat exchange device; 304, main pipe; 305, L-shaped branch pipe; 306, opening and closing assembly; 306-1, fixed plate; 306-2, movable plate; 306-3, spring; 306-4, connecting plate; 306-5, opening adjustment drive member; 306-50, stable bracket; 306-51, support rod; 306-52, support rod; 306-53, support rod; 306-54, support rod; 306-55, support rod; 306-56, support rod; 306-57, support rod; 306-58, support rod; 306-59, support rod; 306-60, support rod; 306-70, support rod; 306-71, support rod; 306-72, support rod; 306-73, support rod; 306-74, support rod; 306-75, support rod; 306-76, support rod; 306-77, support rod; 306-78, support rod; 306-79, support rod; 306-80, support rod; 306-81, support rod; 306-82, support rod; 306-83, support rod; 306-84, support rod; 306-85, support rod; 306-86, support rod; 306-87, support rod; 306-88, support rod 6-52, base; 306-53, double-sided rack; 306-54, first gear; 306-55, second gear; 306-56, synchronization shaft; 306-57, third gear; 306-58, first steering gear; 306-59, second steering gear; 307, exhaust gas flow assist assembly; 307-1, fixed plate; 307-2, movable plate; 307-3, flow force rotating wing; 307-31, connecting shaft; 307-32, airfoil fan blade; 307-4, rotating shaft; 307-5, first air flow hole; 307-6, second air flow hole; 308, exhaust pipe. DETAILED DESCRIPTION
[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0041] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0042] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.
[0043] Reference Figure 1 -9, is an embodiment of the present invention, which provides a high temperature resistant metal mesh belt conveyor for a tunnel furnace, mainly comprising:
[0044] The tunnel furnace body 100, such as Figure 1 The tunnel furnace body 100 includes a feeding section 101, a heating section 102, a discharging section 103 and a metal mesh belt 104. The heating section 102 is arranged between the feeding section 101 and the discharging section 103. The metal mesh belt 104 runs through the entire furnace body and is used to transport the material to be heated from the feeding section 101 to the discharging section 103. The tunnel furnace body 100 also includes an electric heating pipe, which is arranged in the heating section 102 inside the tunnel furnace body 100 and is located on both sides of the metal mesh belt 104, and is used to provide a heat source to heat the material in the tunnel furnace body 100. The tunnel furnace body 100 also includes a pair of air curtain machines 105, which are respectively installed at the upper parts of both ends of the tunnel furnace body 100 to form a protective barrier, which can effectively block external impurities from entering the tunnel furnace body 100 and prevent harmful gases and heat inside the tunnel furnace body 100 from diffusing outward.
[0045] As shown in the figure, the heat source conveying unit 200 is arranged on the top of the tunnel furnace body 100, and is used to convey the heat source to the material to be heated on the metal mesh belt 104. Four heat source conveying units 200 are arranged at equal intervals, and the heat source conveying unit 200 includes a bracket fixedly connected to the top of the tunnel furnace body 100, a fan is fixedly connected to the top of the bracket, and the output shaft at the bottom of the fan is movably inserted into the tunnel furnace body 100 and fixedly connected to the fan blade.
[0046] The exhaust gas discharge unit 300, such as Figure 2The exhaust gas discharge unit 300 is arranged on the top of the tunnel furnace body 100. The exhaust gas discharge unit 300 includes an exhaust fan 301 fixedly connected to the top of one end of the tunnel furnace body 100, a filter 302 fixedly connected to the air inlet end of the exhaust fan 301, a heat exchange device 303 fixedly connected to the air inlet end of the filter 302, a main pipe 304 fixedly connected to the air inlet of the heat exchange device 303, and a plurality of inverted L-shaped branch pipes 305 fixedly connected to one side of the main pipe 304. An opening and closing component 306 and an exhaust gas flow assisting component 307 are arranged in the L-shaped branch pipe 305, and the opening and closing component 306 is connected to the exhaust gas flow assisting component 307.
[0047] Specifically, Figure 2 The heat exchange device 303 is provided with a fresh air inlet and a fresh air outlet. External fresh air enters the heat exchange device 303 through the fresh air inlet and exchanges heat with the exhaust gas barrier. The fresh air outlet of the heat exchange device 303 is fixedly connected to an exhaust pipe 308. A backflow prevention valve is installed on the exhaust pipe 308 to prevent hot air from flowing back. One end of the exhaust pipe 308 away from the heat exchange device 303 extends to the interior of the tunnel furnace body 100 and corresponds to the electric heating pipe. By preheating the fresh air, energy consumption can be reduced.
[0048] Specifically, Figure 4 The opening and closing assembly 306 is arranged in the vertical pipe of the L-shaped branch pipe 305. The opening and closing assembly 306 includes a plurality of alternately arranged fixed plates 306-1 and movable plates 306-2, and the fixed plates 306-1 and the movable plates 306-2 form a circle with good sealing performance, and the circle is adapted to the inside of the L-shaped branch pipe 305. The fixed plate 306-1 is fixedly connected to the inner wall of the L-shaped branch pipe 305, and the movable plate 306-2 is sealed and slidably connected to the inner wall of the L-shaped branch pipe 305 and the fixed plate 306-1. The bottom of each movable plate 306-2 is fixedly connected to a spring 306-3, and the bottom end of the spring 306-3 is fixedly connected to a connecting plate 306-4, and one side of the connecting plate 306-4 is fixedly connected to the inner wall of the L-shaped branch pipe 305. The top of the movable plate 306-2 is fixedly connected to an opening adjustment drive member 306-5, and the opening adjustment drive member 306-5 is connected to the exhaust gas flow assisting assembly 307. During the material conveying process, if the internal air pressure of the tunnel furnace body 100 gradually accumulates and exceeds the preset threshold of the spring 306-3, the movable plate 306-2 will be pushed open, and the exhaust gas will be discharged through the gap formed between the movable plate 306-2 and the fixed plate 306-1 and enter the L-shaped branch pipe 305. It is worth noting that the width of the gap is related to the air pressure. The greater the air pressure, the wider the gap. When the movable plate 306-2 is pushed open, the movable plate 306-2 drives the opening adjustment drive member 306-5 to rise.
[0049] Furthermore, Figure 8-9, the opening adjustment driving member 306-5 includes a plurality of supporting rods 306-51 respectively fixedly connected to the top of each movable plate 306-2, the tops of the plurality of supporting rods 306-51 are fixedly connected to the same base 306-52, the top of the base 306-52 is fixedly connected to a vertically arranged double-sided rack 306-53, one side of the double-sided rack 306-53 is meshedly connected to a first gear 306-54, and the opposite side of the double-sided rack 306-53 is meshedly connected to a second gear 306-55;
[0050] A synchronization shaft 306-56 is fixedly connected at the center of the second gear 306-55, and a third gear 306-57 is fixedly connected to the end of the synchronization shaft 306-56 away from the second gear 306-55. A first steering gear 306-58 is meshedly connected to one side of the third gear 306-57, and a second steering gear 306-59 is meshedly connected to the side of the first steering gear 306-58 away from the third gear 306-57. Both the first gear 306-54 and the second steering gear 306-59 are connected to the exhaust gas flow assisting component 307. The outside of the synchronization shaft 306-56 is rotatably connected to a stable bracket 306-50 through a bearing. The bottom end of the stable bracket 306-50 is fixedly connected to the top of the synchronization shaft 306-56. A fixed shaft is fixedly connected to the center of the first steering gear 306-58, and an end of the fixed shaft away from the first steering gear 306-58 is rotatably connected to the stable bracket 306-50.
[0051] Specifically, Figure 5 -6, the exhaust gas flow assisting component 307 is arranged in the transverse pipe of the L-shaped branch pipe 305, and the exhaust gas flow assisting component 307 includes a fixed plate 307-1 adapted and fixedly connected to the inside of the L-shaped branch pipe 305, a movable plate 307-2 movably fitted with a side of the fixed plate 307-1 facing the double-sided rack 306-53, a flow force rotating wing 307-3 arranged on a side of the fixed plate 307-1 away from the movable plate 307-2, and a rotating shaft 307-4 fixedly connected to the center of a side of the movable plate 307-2 away from the fixed plate 307-1, and one end of the flow force rotating wing 307-3 movably passes through the fixed plate 307-1 and is connected to the center of the movable plate 307-2 The movable disk 307-2 is fixedly connected at the bottom, so that when the movable disk 307-2 rotates, the flow rotor 307-3 can be driven to rotate synchronously. The first gear 306-54 and the second steering gear 306-59 are connected to the rotating shaft 307-4 through a one-way bearing, and the two one-way bearings work in the same direction, that is, only when the first gear 306-54 and the second steering gear 306-59 rotate in the forward direction can the rotational force be transmitted to the rotating shaft 307-4 through the one-way bearings connected to them respectively. When rotating in the reverse direction, the one-way bearing does not work, and therefore, the rotational force cannot be transmitted to the rotating shaft 307-4, thereby ensuring that the flow rotor 307-3 can always assist the flow of exhaust gas.
[0052] A plurality of first air holes 307-5 are evenly distributed on the fixed disk 307-1, and a plurality of second air holes 307-6 are evenly distributed on the movable disk 307-2. When the movable disk 307-2 is not in an ascending state, the plurality of second air holes 307-6 and the plurality of first air holes 307-5 are staggered to ensure that they do not overlap each other. When the movable disk 307-2 rises and links the double-sided rack 306-53 to move upward together, the movable disk 307-2 will rotate, so that the overlapping area of the second air holes 307-6 and the first air holes 307-5 thereon is continuously expanded. The advantage of such a setting is that the overlapping area can be automatically adjusted according to the air flow rate, that is, the size of the air flow inlet is adjusted to ensure that the air flow can pass smoothly and air flow backflow is not easy to occur.
[0053] The flow rotor wing 307-3 includes a connecting shaft 307-31, and one end of the connecting shaft 307-31 away from the fixed disk 307-1 is rotatably connected to the airfoil blade 307-32 through a one-way bearing, so that the airfoil blade 307-32 can rotate in the positive direction. When rotating in the positive direction, the airflow can be accelerated, wherein the one-way bearing has the same working direction as the one-way bearing on the first gear 306-54 and the second steering gear 306-59, and the other end of the connecting shaft 307-31 moves through the fixed disk 307-1 and is fixedly connected at the center of the movable disk 307-2, and the connecting shaft 307-31 is rotatably connected to the fixed disk 307-1 through a bearing, which is used to make the flow rotor wing 307-3 rotate stably as a whole.
[0054] The conveying process using the above high temperature resistant metal mesh belt conveyor for a tunnel furnace includes the following steps:
[0055] Step 1: In the initial stage, the material to be heated is placed on the metal mesh belt 104 of the feeding section 101. Subsequently, the metal mesh belt 104 carries the material through the interior of the tunnel furnace body 100 for heating treatment, and finally outputs the heated material from the discharging section 103;
[0056] Step 2: During the material conveying process, if the air pressure inside the tunnel furnace body 100 gradually accumulates and exceeds the preset threshold of the spring 306-3, the movable plate 306-2 will be pushed open, and the exhaust gas will be discharged through the gap formed between the movable plate 306-2 and the fixed plate 306-1 and enter the L-shaped branch pipe 305. It is worth noting that the width of the gap is related to the air pressure. The greater the air pressure, the wider the gap.
[0057] Step 3: When the movable plate 306-2 is pushed open, the support rod 306-51 and the base 306-52 connected to the movable plate 306-2 drive the double-sided rack 306-53 to rise, and the rising movement of the double-sided rack 306-53 drives the first gear 306-54 and the second gear 306-55 meshed with it to rotate forward and reverse respectively; when the first gear 306-54 rotates forward, the one-way bearing on the first gear 306-54 works, driving the rotating shaft 307-4 and the movable plate 307-2 fixed thereto to rotate forward, and the movable plate 307-2 drives the flow rotor 307-4 fixed thereto to rotate forward. -3 positive rotation, with the rotation of the movable plate 307-2, the overlap area of the second air hole 307-6 and the first air hole 307-5 gradually increases, the size of the overlap area depends on the opening size of the movable plate 306-2, and the overlap is used for the exhaust gas to pass through; the flow force rotating wing 307-3 positive rotation accelerates the flow of the exhaust gas, and when the exhaust gas passes through the airfoil blade 307-32, part of the kinetic energy is transmitted to the airfoil blade 307-32, causing it to rotate, so that when the movable plate 307-2 does not rotate, the exhaust gas flow can be continuously accelerated, so that the high-temperature exhaust gas backflow phenomenon is not likely to occur, thereby extending the service life of the metal mesh belt 104;
[0058] The reverse rotation of the second gear 306-55 transmits power to the third gear 306-57 through the synchronization shaft 306-56, and the third gear 306-57 transmits power to the second steering gear 306-59 through the first steering gear 306-58, so that the second steering gear 306-59 rotates in the reverse direction. Since the one-way bearing on the second steering gear 306-59 does not work, the reverse rotation of the second steering gear 306-59 does not affect the forward rotation state of the rotating shaft 307-4.
[0059] Step 4: As the internal air pressure of the tunnel furnace body 100 gradually decreases, the movable plate 306-2 slowly descends and resets under the action of the rebound force of the spring 306-3. This action causes the double-sided rack 306-53 to descend, thereby causing the first gear 306-54 and the second gear 306-55 to rotate in the reverse and forward directions respectively. At this time, the one-way bearing on the first gear 306-54 does not work, so the rotating shaft 307-4 does not rotate in the reverse direction with it. When the second gear 306-55 rotates forward, the second steering gear 306-59 rotates forward, and the one-way bearing on the second steering gear 306-59 works to transmit the rotational force to the rotating shaft 307-4, so that the rotating shaft 307-4 can only rotate in the forward direction, thereby ensuring that the airfoil blade 307-32 can stably transport airflow;
[0060] Step 5: After the exhaust gas enters the main pipe 304, it is transported to the heat exchange device 303 for heat recovery under the drive of the exhaust fan 301. The exhaust gas after heat recovery is filtered through the filter 302 and finally discharged into the working environment. In addition, external fresh air enters the heat exchange device 303 through the fresh air inlet on the heat exchange device 303 to exchange heat with the exhaust gas barrier to achieve air preheating. The preheated air enters the exhaust pipe 308 through the fresh air outlet on the heat exchange device 303, and then is discharged from the exhaust pipe 308 to the electric heating pipe for reheating, thereby achieving energy saving effect.
[0061] It is worth noting that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.
[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. A high temperature resistant metal mesh belt conveyor for a tunnel furnace, characterized in that: include: A tunnel furnace body (100), the tunnel furnace body (100) comprising a feeding section (101), a heating section (102), a discharging section (103) and a metal mesh belt (104), the heating section (102) being arranged between the feeding section (101) and the discharging section (103), the metal mesh belt (104) being arranged throughout the entire furnace body and being used for conveying materials to be heated from the feeding section (101) to the discharging section (103); A heat source conveying unit (200), the heat source conveying unit (200) being arranged on the top of the tunnel furnace body (100) and being used for conveying the heat source to the material to be heated on the metal mesh belt (104); An exhaust gas discharge unit (300) is arranged on the top of a tunnel furnace body (100), and comprises an exhaust fan (301) fixedly connected to the top of one end of the tunnel furnace body (100), a filter (302) fixedly connected to the air inlet end of the exhaust fan (301), a heat exchange device (303) fixedly connected to the air inlet end of the filter (302), a main pipe (304) fixedly connected to the air inlet of the heat exchange device (303), and a plurality of inverted L-shaped branch pipes (305) fixedly connected to one side of the main pipe (304), wherein an opening and closing component (306) and an exhaust gas flow assisting component (307) are arranged in the L-shaped branch pipe (305), and the opening and closing component (306) is connected to the exhaust gas flow assisting component (307).
2. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 1, characterized in that: The tunnel furnace body (100) further comprises an electric heating pipe, which is arranged in a heating section (102) inside the tunnel furnace body (100) and located on both sides of the metal mesh belt (104) to provide a heat source to heat the material in the tunnel furnace body (100).
3. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 1, characterized in that: The tunnel furnace body (100) further comprises a pair of air curtain machines (105), which are respectively installed at the upper parts of both ends of the tunnel furnace body (100) to form a protective barrier, which can effectively block external impurities from entering the tunnel furnace body (100) and prevent harmful gases and heat inside the tunnel furnace body (100) from diffusing outwards.
4. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 1, characterized in that: Four heat source transport units (200) are arranged at equal intervals, and the heat source transport units (200) include a bracket fixedly connected to the top of the tunnel furnace body (100), a fan fixedly connected to the top of the bracket, and an output shaft at the bottom of the fan movably inserted into the tunnel furnace body (100) and fixedly connected to a fan blade.
5. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 1, characterized in that: The heat exchange device (303) is provided with a fresh air inlet and a fresh air outlet. External fresh air enters the heat exchange device (303) through the fresh air inlet and performs heat exchange with the exhaust gas barrier. The fresh air outlet of the heat exchange device (303) is fixedly connected to an exhaust pipe (308). A backflow prevention valve is installed on the exhaust pipe (308). One end of the exhaust pipe (308) away from the heat exchange device (303) extends to the interior of the tunnel furnace body (100) and corresponds to the electric heating pipe.
6. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 1, characterized in that: The opening and closing assembly (306) is arranged in the vertical pipe of the L-shaped branch pipe (305), and the opening and closing assembly (306) includes a plurality of fixed plates (306-1) and movable plates (306-2) arranged alternately, and the fixed plates (306-1) and the movable plates (306-2) form a circle with good sealing performance, and the circle is adapted to the inside of the L-shaped branch pipe (305), the fixed plate (306-1) is fixedly connected to the inner wall of the L-shaped branch pipe (305), and the movable plate (306-2) is connected to the inner wall of the L-shaped branch pipe (305) in a fixed manner. and a fixed plate (306-1) are sealed and slidably connected, the bottom of each movable plate (306-2) is fixedly connected to a spring (306-3), the bottom end of the spring (306-3) is fixedly connected to a connecting plate (306-4), one side of the connecting plate (306-4) is fixedly connected to the inner wall of the L-shaped branch pipe (305), the top of the movable plate (306-2) is fixedly connected to an opening adjustment driving member (306-5), and the opening adjustment driving member (306-5) is connected to an exhaust gas flow assisting component (307).
7. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 6, characterized in that: The opening adjustment driving member (306-5) comprises a plurality of supporting rods (306-51) respectively fixedly connected to the top of each movable plate (306-2); the tops of the plurality of supporting rods (306-51) are fixedly connected to the same base (306-52); the top of the base (306-52) is fixedly connected to a vertically arranged double-sided rack (306-53); one side of the double-sided rack (306-53) is meshedly connected to a first gear (306-54); the opposite side of the double-sided rack (306-53) is meshedly connected to a second gear (306-55); the center of the second gear (306-55) is fixedly connected to a synchronous shaft (306-56); the end of the synchronous shaft (306-56) away from the second gear (306-55) is fixedly connected to a third gear (306-57); One side of the third gear (306-57) is meshedly connected with a first steering gear (306-58), and one side of the first steering wheel (306-58) away from the third gear (306-57) is meshedly connected with a second steering gear (306-59). Both the first gear (306-54) and the second steering gear (306-59) are connected to an exhaust gas flow booster assembly (307). The outside of the synchronous shaft (306-56) is rotatably connected with a stabilizing bracket (306-50) through a bearing. The bottom end of the stabilizing bracket (306-50) is fixedly connected to the top of the synchronous shaft (306-56). The center of the first steering gear (306-58) is fixedly connected with a fixed shaft, and one end of the fixed shaft away from the first steering gear (306-58) is rotatably connected to the stabilizing bracket (306-50).
8. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 7, characterized in that: The exhaust gas flow assisting component (307) is arranged in the transverse pipe of the L-shaped branch pipe (305), and the exhaust gas flow assisting component (307) comprises a fixed plate (307-1) adapted and fixedly connected to the inside of the L-shaped branch pipe (305), a movable plate (307-2) movably fitted with a side of the fixed plate (307-1) facing the double-sided rack (306-53), and a flow force rotating wing (307-3) arranged on a side of the fixed plate (307-1) away from the movable plate (307-2). and a rotating shaft (307-4) fixedly connected to the center of a side of the movable disk (307-2) away from the fixed disk (307-1); one end of the flow rotating wing (307-3) movably passes through the fixed disk (307-1) and is fixedly connected to the center of the movable disk (307-2); the first gear (306-54) and the second steering gear (306-59) are both connected to the rotating shaft (307-4) via a one-way bearing, and the two one-way bearings have the same working direction; The fixed disk (307-1) is evenly distributed with a plurality of first air holes (307-5), and the movable disk (307-2) is evenly distributed with a plurality of second air holes (307-6). When the movable disk (307-2) is not in an ascending state, the plurality of second air holes (307-6) and the plurality of first air holes (307-5) are arranged in a staggered manner to ensure that they do not overlap each other. When the movable disk (307-2) rises and links the double-sided rack (306-53) to move upward together, the movable disk (307-2) rotates, so that the overlap area of the second air holes (307-6) and the first air holes (307-5) thereon is continuously expanded.
9. The high temperature resistant metal mesh belt conveyor for tunnel furnace according to claim 8, characterized in that: The flow rotary wing (307-3) comprises a connecting shaft (307-31), one end of the connecting shaft (307-31) away from the fixed disk (307-1) is rotatably connected to an airfoil blade (307-32) via a one-way bearing, wherein the one-way bearing has the same working direction as the one-way bearings on the first gear (306-54) and the second steering gear (306-59), the other end of the connecting shaft (307-31) movably passes through the fixed disk (307-1) and is fixedly connected to the center of the movable disk (307-2), and the connecting shaft (307-31) is rotatably connected to the fixed disk (307-1) via a bearing.
10. The conveying process of the high temperature resistant metal mesh belt conveying device for a tunnel furnace according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: In the initial stage, the material to be heated is placed on the metal mesh belt (104) of the feeding section (101), and then the metal mesh belt (104) carries the material through the interior of the tunnel furnace body (100) for heating treatment, and finally outputs the heated material from the discharging section (103); Step 2: During the material conveying process, if the internal air pressure of the tunnel furnace body (100) gradually accumulates and exceeds the preset threshold of the spring (306-3), the movable plate (306-2) will be pushed open, and the exhaust gas will be discharged through the gap formed between the movable plate (306-2) and the fixed plate (306-1) and enter the L-shaped branch pipe (305). It is worth noting that the width of the gap is related to the air pressure. The greater the air pressure, the wider the gap. Step 3: When the movable plate (306-2) is pushed open, the support rod (306-51) and the base (306-52) connected to the movable plate (306-2) drive the double-sided rack (306-53) to rise, and the rising movement of the double-sided rack (306-53) drives the first gear (306-54) and the second gear (306-55) meshed with it to rotate forward and reverse respectively; when the first gear (306-54) rotates forward, the one-way bearing on the first gear (306-54) works, driving the rotating shaft (307-4) and the movable plate (307-2) fixed thereto to rotate forward, and the movable plate (307-2) is rotated forward. 7-2) drives the flow force rotating wing (307-3) fixedly connected thereto to rotate forwardly, and as the movable disk (307-2) rotates, the overlapping area of the second air flow hole (307-6) and the first air flow hole (307-5) gradually increases, and the size of the overlapping area depends on the opening size of the movable plate (306-2), and the overlapping area is used for the exhaust gas to pass through; the flow force rotating wing (307-3) rotates forwardly to accelerate the flow of the exhaust gas, and when the exhaust gas passes through the airfoil blade (307-32), part of the kinetic energy is transmitted to the airfoil blade (307-32), causing it to rotate, so that the exhaust gas flow can be continuously accelerated when the movable disk (307-2) does not rotate; The reverse rotation of the second gear (306-55) transmits power to the third gear (306-57) through the synchronization shaft (306-56), and the third gear (306-57) transmits power to the second steering gear (306-59) through the first steering gear (306-58), so that the second steering gear (306-59) rotates in the reverse direction. Since the one-way bearing on the second steering gear (306-59) does not work, the reverse rotation of the second steering gear (306-59) does not affect the forward rotation state of the rotating shaft (307-4); Step 4: As the internal air pressure of the tunnel furnace body (100) gradually decreases, the movable plate (306-2) slowly descends and resets under the action of the spring (306-3) under the rebound force. This action causes the double-sided rack (306-53) to descend, thereby causing the first gear (306-54) and the second gear (306-55) to rotate in the reverse direction and forward direction respectively. At this time, the one-way bearing on the first gear (306-54) does not work, so the rotating shaft (307-4) does not rotate in the reverse direction with it. When the second gear (306-55) rotates forward, it causes the second steering gear (306-59) to rotate forward. The one-way bearing on the second steering gear (306-59) works to transmit the rotational force to the rotating shaft (307-4), so that the rotating shaft (307-4) can only rotate in the forward direction, thereby ensuring that the airfoil blade (307-32) can stably transport airflow; Step 5: After the exhaust gas enters the main pipe (304), it is driven by the exhaust fan (301) to be transported to the heat exchange device (303) for heat recovery. The exhaust gas after heat recovery is filtered through the filter (302) and finally discharged into the working environment. In addition, external fresh air enters the heat exchange device (303) through the fresh air inlet on the heat exchange device (303) to exchange heat with the exhaust gas barrier to achieve air preheating. The preheated air enters the exhaust pipe (308) through the fresh air outlet on the heat exchange device (303), and then is discharged from the exhaust pipe (308) to the electric heating pipe for reheating, thereby achieving energy saving effect.