Energy-saving annealing furnace and bottle body stress relief equipment

Abstract

This invention relates to the field of annealing furnace technology, providing an energy-saving annealing furnace and a bottle body stress relief device, including a furnace body, a mesh belt conveyor, a first electric heating device, a second electric heating device, a circulating fan device, and a hot gas extraction device. The furnace body is divided into a high-temperature zone and a slow cooling zone. The high-temperature zone is located at the front of the furnace body, and the slow cooling zone is located at the rear. The first electric heating device and the circulating fan device are both installed in the high-temperature zone, while the second electric heating device and the hot gas extraction device are both installed in the slow cooling zone. The hot gas extraction device includes an inlet fan, an exhaust fan, a gas supply pipe, a gas delivery pipe, a suction pipe, an exhaust pipe, a nozzle, a fixing frame, and an air filter. Advantages: It reduces the length of the second electric heating device in the slow cooling zone of the annealing furnace. The inlet fan of the hot gas extraction device blows air into the slow cooling zone, drawing away some of the hot gas from the slow cooling zone and discharging it before the inlet of the high-temperature zone, thus reducing the energy consumption of the first electric heating device in the high-temperature zone of the annealing furnace.

Description

Technical Field

[0001] This invention relates to the field of annealing furnace technology, and more specifically to an energy-saving annealing furnace and a bottle stress relief device. Background Technology

[0002] Annealing furnaces are widely used heat treatment equipment in industrial production. The main function of annealing furnaces is to eliminate internal stress in workpieces, improve the material structure and mechanical properties of workpieces, and improve product quality through processes such as heating and cooling.

[0003] like Figure 1 As shown, a conventional annealing furnace includes a furnace body 11, a mesh belt conveyor 12, a first electric heating device 13, a second electric heating device 14, and a circulating fan device 15. The furnace body 11 is divided into a high-temperature zone 111 and a slow-cooling zone 112. The high-temperature zone 111 is located at the front of the furnace body 11, and the slow-cooling zone 112 is located at the rear of the furnace body 11. The first electric heating device 13 and the circulating fan device 15 are both installed in the high-temperature zone 111, and the second electric heating device 14 is installed in the slow-cooling zone 112. The mesh belt conveyor 12 passes through the high-temperature zone 111 and the slow-cooling zone 112. The second electric heating device 14 is distributed along the length of the slow-cooling zone 112. From the inlet to the outlet of the slow-cooling zone 112, the temperature of the second electric heating device 14 gradually decreases.

[0004] The conveyor belt carries the workpieces sequentially through the high-temperature zone and the slow-cooling zone. The electric heating device generates heat by consuming electrical energy, and the circulating fan generates circulating air within the high-temperature zone of the furnace. This air passes through the first electric heating device to form hot air, which heats the workpieces on the conveyor belt. In the production workshop, as the workpieces enter the high-temperature zone of the annealing furnace, the low-temperature air outside the furnace flows in with them from the furnace inlet, providing a cooling effect. To maintain a stable temperature in the high-temperature zone, the first electric heating device must increase its operating power, which increases the energy consumption of the first electric heating device in the high-temperature zone of the annealing furnace. After the workpiece has been in the high-temperature zone for a specified time, it needs to be cooled. If it is directly air-cooled, the residual stress will not be completely eliminated, which can easily lead to cold cracks. When the workpiece enters the slow cooling zone from the high-temperature zone of the annealing furnace, since the length of the second electric heating device is equal to the length of the slow cooling zone, the second electric heating device uses a large number of heating tubes, which increases the probability of damage to the heating tubes. Damaged heating tubes can easily interfere with the stress elimination effect of the workpiece, and the manual inspection of each heating tube is time-consuming.

[0005] Therefore, how to prevent low-temperature air from flowing into the high-temperature zone of the furnace body, thereby reducing the energy consumption of the first electric heating device in the high-temperature zone and reducing the length of the second electric heating device in the slow cooling zone, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an energy-saving annealing furnace and a bottle stress relief device; to prevent low-temperature air outside the annealing furnace from flowing into the high-temperature zone of the furnace body, thereby reducing the energy consumption of the first electric heating device in the high-temperature zone and reducing the length of the second electric heating device in the slow cooling zone.

[0007] The technical solution of the present invention is implemented as follows: an energy-saving annealing furnace, comprising a furnace body, a mesh belt conveyor, a first electric heating device, a second electric heating device, a circulating fan device, and a hot gas extraction device;

[0008] The furnace body is divided into a high-temperature zone and a slow-cooling zone. The high-temperature zone is located at the front of the furnace body, and the slow-cooling zone is located at the rear of the furnace body. The first electric heating device and the circulating fan device are both installed in the high-temperature zone, and the second electric heating device and the hot gas extraction device are both installed in the slow-cooling zone. The mesh belt conveyor device passes through the high-temperature zone and the slow-cooling zone.

[0009] The hot air extraction device includes an intake fan, an exhaust fan, an air supply pipe, an air delivery pipe, an intake pipe, an exhaust pipe, a nozzle, a fixed frame, and an air filter;

[0010] The air filter is installed at the inlet of the air supply pipe. The outlet of the air supply pipe is connected to the inlet of the air intake fan. The outlet of the air intake fan is connected to the inlet of the air delivery pipe. The outlet of the air delivery pipe communicates with the top of the slow cooling zone. The second electric heating device is located at the front end of the slow cooling zone. The outlet of the air delivery pipe faces the second electric heating device. The inlet of the suction pipe communicates with the top of the slow cooling zone and is also located behind the second electric heating device. The outlet of the suction pipe is connected to the inlet of the exhaust fan. The outlet of the exhaust fan is connected to the inlet of the exhaust pipe. The outlet of the exhaust pipe is connected to the nozzle. The fixed frame is located in front of the inlet of the high-temperature zone and is also located above the mesh belt conveyor. The nozzle is located on the fixed frame and is used to spray gas toward the mesh belt conveyor. The flow rate of the air delivery pipe is greater than the flow rate of the suction pipe.

[0011] Furthermore, the hot gas extraction device also includes a gas distribution pipe, the top inlet of which is connected to the outlet of the exhaust pipe, and the bottom outlet of which is connected to the jet nozzle. The plurality of jet nozzles are evenly spaced along the inlet width direction of the high-temperature zone.

[0012] Furthermore, the outlet of the gas supply pipe is inclined downwards and toward the outlet direction of the slow cooling zone.

[0013] Furthermore, the shaft of the intake fan and the shaft of the exhaust fan are connected by a coupling, the intake fan is an active fan, and the exhaust fan is a driven fan.

[0014] Furthermore, the first electric heating device includes a horizontal frame, an electric heating tube, a temperature sensor, and a temperature controller. The electric heating tube is fixedly connected to the horizontal frame, and multiple electric heating tubes are evenly spaced along the transport direction of the mesh belt conveyor. The horizontal frame is fixedly connected to the interior of the furnace body. The temperature sensor is installed inside the furnace body, and the temperature controller is installed outside the furnace body. The temperature sensor is electrically connected to the temperature controller, and the temperature controller is also electrically connected to the electric heating tube.

[0015] The circulating fan device includes a fan motor and a fan wheel. A rotating hole is provided on the top side of the furnace body. The fan motor is located outside the furnace body, and the fan wheel is located inside the furnace body. The output shaft of the fan motor passes through the rotating hole and is fixedly connected to the center of the fan wheel. When the fan motor drives the fan wheel, a circulating airflow is formed inside the furnace body.

[0016] A bottle stress relief device includes an annealing furnace, a bottle conveying machine, a bottle pusher, and a temperature-controlled gas spray gun device, wherein the annealing furnace is an energy-saving annealing furnace.

[0017] The temperature-controlled gas spray gun device includes a bracket, a spray gun, a first gas pipe, a second gas pipe, a first electromagnetic switch valve, a second electromagnetic switch valve, a gas supply component, an air supply component, a bottle detection component, and a valve controller.

[0018] The spray gun is fixedly connected to the bracket, which is fixedly installed above the bottle conveyor. The spray nozzle of the spray gun faces downward. The bottle inspection assembly is fixedly connected to the bracket and is located between the spray gun and the bottle conveyor. The bottle inspection assembly is electrically connected to the valve controller, which is also electrically connected to the first electromagnetic switch valve and the second electromagnetic switch valve. The first air inlet of the spray gun is connected to the gas supply assembly through a first gas pipe, and the second air inlet of the spray gun is connected to the gas supply assembly through a second gas pipe. The first electromagnetic switch valve is installed in the first gas pipe, and the second electromagnetic switch valve is installed in the second gas pipe.

[0019] The bottle pusher and the annealing furnace are located on opposite sides of the bottle conveyor. The bottle conveyor first passes through the temperature-controlled gas spray gun device and then through the annealing furnace. The bottle pusher pushes the bottles on the bottle conveyor to the mesh belt conveyor of the annealing furnace. The mesh belt conveyor of the annealing furnace causes the bottles to pass through the high-temperature zone and the slow-cooling zone of the annealing furnace in sequence.

[0020] Furthermore, it also includes a thermal spraying cabinet; the bracket is fixedly installed at the entrance of the thermal spraying cabinet, and the bottle conveying machine passes through the thermal spraying cabinet.

[0021] Furthermore, the gas supply assembly includes a compressed gas storage tank and a first pressure gauge. The outlet of the compressed gas storage tank is connected to the first gas pipe, and the first pressure gauge is installed at the outlet of the compressed gas storage tank.

[0022] The air supply assembly includes a compressed air tank and a second pressure gauge. The outlet of the compressed air tank is connected to the second air pipe, and the second pressure gauge is installed at the outlet of the compressed air tank.

[0023] Furthermore, the temperature-controlled gas spray gun device also includes a first flow sensor and a second flow sensor, with the first flow sensor installed in the first gas pipe and the second flow sensor installed in the second gas pipe.

[0024] Furthermore, the temperature-controlled gas spray gun device also includes an infrared thermal imager, which is installed at the entrance of the hot spray cabinet and is located on one side of the transport direction of the bottle conveyor.

[0025] Compared with the prior art, the beneficial effects or advantages of the present invention are as follows: The length of the second electric heating device in the slow cooling zone of the annealing furnace is reduced. The second electric heating device is located at the front end of the slow cooling zone, with a hot air extraction device added. Air is blown into the slow cooling zone by an inlet fan, and the air is heated by the second electric heating device to form hot air. As the hot air flows towards the outlet of the slow cooling zone, its temperature gradually decreases. Workpieces passing through the high-temperature zone enter the slow cooling zone with the mesh belt conveyor, gradually cooling down before finally leaving the outlet of the slow cooling zone for air cooling, ensuring complete elimination of residual stress. Because the length of the second electric heating device is reduced, the number of heating elements is reduced, and the time spent manually inspecting each heating element is reduced. A portion of the hot air in the slow cooling zone is extracted by the exhaust fan and discharged in front of the inlet of the high-temperature zone. This hot air effectively prevents low-temperature air from outside the annealing furnace from flowing into the high-temperature zone of the furnace, thereby reducing the energy consumption of the first electric heating device in the high-temperature zone. Furthermore, the hot air at the fixed frame position has a temperature-regulating effect. Workpieces located on the mesh belt conveyor first pass through the temperature-regulating fixed frame before reaching the inlet of the high-temperature zone, effectively avoiding sudden temperature increases in the workpieces. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the structure of a traditional annealing furnace in the background technology.

[0028] Figure 2This is a schematic diagram of the structure of the energy-saving annealing furnace of the present invention.

[0029] Figure 3 This is a schematic diagram showing the positions of the horizontal frame, electric heating tube, fan motor, and impeller of the present invention.

[0030] Figure 4 This is a schematic diagram showing the positions of the hot gas extraction device, the second electric heating device, and the mesh belt conveyor device of the present invention.

[0031] Figure 5 This is a schematic diagram showing the connection of the gas distribution pipe, the jet nozzle, and the exhaust pipe of the present invention.

[0032] Figure 6 This is a schematic diagram showing the positions of the annealing furnace, bottle conveyor, and bottle pusher of the present invention.

[0033] Figure 7 This is a schematic diagram showing the positions of the temperature-controlled gas spray gun device, the hot spray cabinet, and the bottle feeder of the present invention.

[0034] Figure 8 This is a schematic diagram showing the connection of the spray gun, first air pipe, second air pipe, first electromagnetic proportional valve, second electromagnetic proportional valve, valve controller, and bottle inspection assembly of the present invention.

[0035] Figure 9 This is a schematic diagram showing the positions of the spray gun, bottle, transmitter, receiver, and bottle conveyor of the present invention.

[0036] Figure 10 This is a schematic diagram showing the positions of the infrared thermal imager, the bottle, and the bottle conveyor of the present invention.

[0037] Reference numerals: Annealing furnace 1; Furnace body 11; High temperature zone 111; Slow cooling zone 112; Mesh belt conveyor 12; First electric heating device 13; Horizontal frame 131; Electric heating tube 132; Second electric heating device 14; Circulating fan device 15; Fan motor 151; Fan wheel 152; Hot gas extraction device 16; Inlet fan 161; Exhaust fan 162; Gas supply pipe 163; Gas delivery pipe 164; Intake pipe 165; Exhaust pipe 166; Jet nozzle 167; Fixed frame 168; Air filter 169; Gas distribution pipe 1610; Bottle conveyor 2; Bottle pusher 3; Temperature control Gas spray gun device 4; bracket 41; spray gun 42; first gas pipe 43; first electromagnetic proportional valve 431; first flow sensor 432; second gas pipe 44; second electromagnetic proportional valve 441; second flow sensor 442; first electromagnetic switch valve 45; second electromagnetic switch valve 46; gas supply assembly 47; compressed gas storage tank 471; first pressure gauge 472; air supply assembly 48; compressed air storage tank 481; second pressure gauge 482; bottle detection assembly 49; transmitter 491; receiver 492; valve controller 410; thermal spray cabinet 5; infrared thermal imager 6; bottle 7. Detailed Implementation

[0038] This invention provides an energy-saving annealing furnace and a bottle stress relief device. The overall concept of the technical solution is as follows: reduce the length of the second electric heating device in the slow cooling zone of the annealing furnace. The second electric heating device is located at the front end of the slow cooling zone. Hot air is blown into the second electric heating device by the inlet fan of the hot air extraction device. The hot air flows towards the outlet of the slow cooling zone. During the flow, the temperature of the hot air gradually decreases due to heat dissipation. After the workpiece has undergone annealing treatment in the high-temperature zone, it enters the slow cooling zone by a mesh belt conveyor. The temperature of the workpiece gradually decreases as it moves towards the outlet of the slow cooling zone, which helps to completely relieve the stress of the workpiece and effectively avoids the workpiece being directly cooled by the air. The exhaust fan of the hot air extraction device draws some of the hot air in the slow cooling zone to the inlet of the high-temperature zone. This hot air effectively prevents the low-temperature air outside the annealing furnace from entering the high-temperature zone, reducing the energy consumption of the first electric heating device in the high-temperature zone of the annealing furnace. This hot air also creates a temperature regulation effect in front of the inlet of the high-temperature zone.

[0039] The energy-saving annealing furnace of this invention is applied to bottle stress relief equipment. First, a mixture of gas and air is injected into the bottle mouth. The mixture is ignited when it comes into contact with the temperature of the bottle. The heat generated by the combustion regulates the temperature of the bottle, thereby improving the uniformity of the temperature distribution. The bottle with uniform temperature distribution is transported by a bottle conveyor through a hot spray cabinet and then pushed into the annealing furnace by a bottle pusher. The bottle is preheated by hot gas before entering the high-temperature zone and then enters the slow cooling zone to ensure that the stress is completely relieved. Finally, the bottle leaves the slow cooling zone of the annealing furnace.

[0040] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0041] See Figures 2 to 5 The first embodiment of the present invention.

[0042] An energy-saving annealing furnace includes a furnace body 11, a mesh belt conveyor 12, a first electric heating device 13, a second electric heating device 14, a circulating fan device 15, and a hot gas extraction device 16.

[0043] The furnace body 11 is divided into a high-temperature zone 111 and a slow-cooling zone 112. The high-temperature zone 111 is located at the front of the furnace body 11, and the slow-cooling zone 112 is located at the rear of the furnace body 11. The first electric heating device 13 and the circulating fan device 15 are both installed in the high-temperature zone 111, and the second electric heating device 14 and the hot gas extraction device 16 are both installed in the slow-cooling zone 112. The mesh belt conveyor device 12 passes through the high-temperature zone 111 and the slow-cooling zone 112.

[0044] The hot air extraction device 16 includes an intake fan 161, an exhaust fan 162, an air supply pipe 163, an air delivery pipe 164, an intake pipe 165, an exhaust pipe 166, a jet nozzle 167, a fixed frame 168, and an air filter 169.

[0045] The air filter 169 is installed at the inlet of the air supply pipe 163. The outlet of the air supply pipe 163 is connected to the inlet of the air intake fan 161. The outlet of the air intake fan 161 is connected to the inlet of the air delivery pipe 164. The outlet of the air delivery pipe 164 communicates with the top of the slow cooling zone 112. The second electric heating device 14 is located at the front end of the slow cooling zone 112. The outlet of the air delivery pipe 164 faces the second electric heating device 14. The inlet of the suction pipe 165 communicates with the top of the slow cooling zone 112. The inlet of the suction pipe 165 is also located at the second electric heating device 14. Behind the heating device 14, the outlet of the suction pipe 165 is connected to the inlet of the exhaust fan 162, the outlet of the exhaust fan 162 is connected to the inlet of the exhaust pipe 166, the outlet of the exhaust pipe 166 is connected to the nozzle 167, the fixed frame 168 is located in front of the inlet of the high temperature zone 111, the fixed frame 168 is also located above the mesh belt conveyor 12, the nozzle 167 is located on the fixed frame 168 and is used to spray gas toward the mesh belt conveyor 12, and the flow rate of the air supply pipe 164 is greater than the flow rate of the suction pipe 165.

[0046] The beneficial effects or advantages of this invention are: reducing the length of the second electric heating device 14 in the slow cooling zone 112 of the annealing furnace. The second electric heating device 14 is located at the front end of the slow cooling zone 112, with a hot air extraction device 16 added. Air is blown into the slow cooling zone 112 by the air inlet fan 161. The air is heated by the second electric heating device 14 to form hot air. As the hot air flows towards the outlet of the slow cooling zone 112, its temperature gradually decreases. The workpiece, having passed through the high-temperature zone, enters the slow cooling zone 112 along with the mesh belt conveyor 12. The workpiece gradually cools and finally leaves the outlet of the slow cooling zone 112 for air cooling, ensuring that residual stress is completely eliminated. Due to the second electric heating device 14... The length of 4 is reduced, so the number of heating tubes in the second electric heating device 14 is reduced, and the time spent on inspecting each heating tube is reduced. The exhaust fan 162 draws away some of the hot air from the slow cooling zone 112 and discharges it in front of the entrance to the high temperature zone 111. This hot air effectively prevents the low temperature air outside the annealing furnace 1 from entering the high temperature zone 111, thereby reducing the energy consumption of the first electric heating device 13 in the high temperature zone 111. In addition, the hot air has a temperature regulating effect at the position of the fixed frame 168. The workpiece located in the mesh belt conveyor 12 first passes through the temperature regulation of the fixed frame 168 before reaching the entrance of the high temperature zone 111, effectively avoiding the workpiece encountering a sudden temperature rise.

[0047] Air filter 169 is used to filter out impurities from the outside air; nozzle 167 diffuses the ejected gas; the flow rate of the air supply pipe 164 is greater than that of the air intake pipe 165, so the gas in the air supply pipe 164 blows towards the hot air formed after the second electric heating device 14, part of which passes through the air intake pipe 165 and the exhaust pipe 166 to reach the inlet of the high-temperature zone 111 of the annealing furnace, and the other part flows towards the outlet of the slow cooling zone 112. The diameter of the air supply pipe 164 is larger than that of the air intake pipe 165, and when the gas flow speed is the same, the flow rate of the air supply pipe 164 is greater than that of the air intake pipe 165. This invention employs flowing hot air in the slow cooling zone 112, eliminating the need for the relatively long second electric heating device 14 in the slow cooling zone 112 of traditional annealing furnaces in the prior art. Furthermore, by reducing the length of the second electric heating device 14, the number of heating tubes used in the second electric heating device 14 is reduced, making it easier to identify damaged heating tubes during maintenance. The second electric heating device 14 is located at the front end of the slow cooling zone 112, while the inlet fan 161 and exhaust fan 162 are located outside the annealing furnace 1, facilitating maintenance of the inlet fan 161 and exhaust fan 162 from outside the annealing furnace 1. The hot air in the slow cooling zone 112 is drawn in and discharged in front of the inlet of the high-temperature zone 111, not only preventing low-temperature air from flowing into the inlet of the high-temperature zone 111 of the furnace body 11, reducing the energy consumption of the first electric heating device 13, but also playing a certain temperature regulation role in front of the inlet of the high-temperature zone, preventing the workpiece from encountering a sudden temperature rise.

[0048] Furthermore, the hot gas extraction device 16 also includes a gas distribution pipe 1610, the top inlet of which is connected to the outlet of the exhaust pipe 166, and the bottom outlet of which is connected to the jet nozzle 167. A plurality of jet nozzles 167 are evenly spaced along the inlet width direction of the high temperature zone 111.

[0049] The beneficial effects of this technical solution are: the gas distribution pipe 1610 disperses the extracted hot gas to multiple jet nozzles 167, and the hot gas ejected from the multiple jet nozzles 167 forms a hot air curtain effect, which more effectively prevents low-temperature air in the production workshop from entering the high-temperature zone 111 of the annealing furnace 1.

[0050] Furthermore, the outlet of the gas supply pipe 164 is downward and inclined toward the outlet direction of the slow cooling zone 112.

[0051] The beneficial effects of this technical solution are: it helps the hot air generated by the heating of the gas coming out of the gas supply pipe 164 by the second electric heating device 14 to flow towards the outlet of the slow cooling zone 112; during the flow, some of the hot air is drawn away by the exhaust fan 162 and discharged to the front of the inlet of the high temperature zone 111.

[0052] Furthermore, the shaft of the intake fan 161 is connected to the shaft of the exhaust fan 162 via a coupling, the intake fan 161 is an active fan, and the exhaust fan 162 is a passive fan.

[0053] The beneficial effects of this technical solution are: the coupling enables the shafts of the inlet fan 161 and the exhaust fan 162 to rotate simultaneously, that is, the inlet fan 161 and the exhaust fan 162 can start at the same time. The inlet fan 161 is equipped with a rotary drive motor, while the exhaust fan 162 does not have a rotary drive motor.

[0054] Further, the first electric heating device 13 includes a horizontal frame 131, an electric heating tube 132, a temperature sensor (not shown), and a temperature controller (not shown). The electric heating tube 132 is fixedly connected to the horizontal frame 131. A plurality of electric heating tubes 132 are evenly spaced along the transport direction of the mesh belt transport device 12. The horizontal frame 131 is fixedly connected to the interior of the furnace body 11. The temperature sensor is installed inside the furnace body 11, and the temperature controller is installed outside the furnace body 11. The temperature sensor is electrically connected to the temperature controller, and the temperature controller is also electrically connected to the electric heating tube 132.

[0055] The circulating fan device 15 includes a fan motor 151 and a fan wheel 152. A rotating hole is provided on the top side of the furnace body 11. The fan motor 151 is located outside the furnace body 11, and the fan wheel 152 is located inside the furnace body 11. The output shaft of the fan motor 151 passes through the rotating hole and is fixedly connected to the center of the fan wheel 152. When the fan motor 151 drives the fan wheel 152, a circulating airflow is formed inside the furnace body 11.

[0056] The beneficial effects of this technical solution are as follows: Under the action of the impeller 152, flowing air is blown between the heating elements 132 of the first electric heating device 13 to form hot air. The hot air circulates in the high-temperature zone 111, performing heat treatment on the workpiece. The temperature sensor detects the temperature in the high-temperature zone 111 in real time and feeds it back to the temperature controller. The temperature controller adjusts the power of the heating elements 132 to keep the temperature in the high-temperature zone 111 stable. The temperature controller is a device of existing technology.

[0057] In the first embodiment, the second electric heating device 14 has the same structure as the first electric heating device 13. The length of the first electric heating device 13 is the same as the length of the high-temperature zone 111, and the second electric heating device 14 is only set at the front end of the slow cooling zone 112. There are multiple high-temperature zones 111, and the temperature of each high-temperature zone 111 is different according to the actual annealing requirements of the workpiece. For example, there are three high-temperature zones 111. The workpiece passes through the three high-temperature zones 111 in sequence on the mesh belt conveyor 12 and then enters the slow cooling zone 112. The air blower 161 blows air into the front end of the slow cooling zone 112. The air is heated by the second electric heating device 14 to form hot air. The hot air flows towards the rear end of the slow cooling zone 112, that is, towards the outlet of the slow cooling zone 112. Due to the heat dissipation effect, the temperature of the hot air is lower the closer it is to the outlet of the slow cooling zone 112. Thus, the temperature of the hot air gradually decreases from the front end to the rear end of the slow cooling zone 112. The part of the hot air that gradually cools down in the slow cooling zone 112 is drawn to the front of the inlet of the high-temperature zone 111 by the exhaust fan 162, effectively preventing the low-temperature air outside the annealing furnace 1 from entering the high-temperature zone 111.

[0058] See Figures 6 to 10 The second embodiment of the present invention.

[0059] A bottle stress relief device includes an annealing furnace 1, a bottle conveyor 2, a bottle pusher 3, and a temperature-controlled gas spray gun device 4, wherein the annealing furnace 1 is an energy-saving annealing furnace.

[0060] The temperature-controlled gas spray gun device 4 includes a bracket 41, a spray gun 42, a first gas pipe 43, a second gas pipe 44, a first electromagnetic switch valve 45, a second electromagnetic switch valve 46, a gas supply assembly 47, an air supply assembly 48, a bottle detection assembly 49, and a valve controller 410.

[0061] The spray gun 42 is fixedly connected to the bracket 41, which is fixedly positioned above the bottle conveyor 2. The spray nozzle of the spray gun 42 faces downward. The bottle inspection assembly 49 is fixedly connected to the bracket 41 and is located between the spray gun 42 and the bottle conveyor 2. The bottle inspection assembly 49 is electrically connected to the valve controller 410, which is also electrically connected to the first electromagnetic switch valve 45 and the second electromagnetic switch valve 46. The first air inlet of the spray gun 42 is connected to the gas supply assembly 47 through a first air pipe 43, and the second air inlet of the spray gun 42 is connected to the gas supply assembly 47 through a second air pipe 44. The first electromagnetic switch valve 45 is installed in the first air pipe 43, and the second electromagnetic switch valve 46 is installed in the second air pipe 44.

[0062] The bottle pusher 3 and the annealing furnace 1 are respectively on both sides of the bottle conveyor 2. The bottle pusher 3 pushes the bottle 7 located on the bottle conveyor 2 to the mesh belt conveyor 12 of the annealing furnace 1. The mesh belt conveyor 12 of the annealing furnace 1 causes the bottle 7 to pass through the high temperature zone 111 and the slow cooling zone 112 of the annealing furnace 1 in sequence.

[0063] The beneficial effects of this technical solution are as follows: The workpiece is bottle 7; when the bottle detection component 49 detects bottle 7 passing under spray gun 42, it sends a feedback signal to valve controller 410. Valve controller 410 causes spray gun 42 to inject a mixture of gas and air into the bottle mouth of bottle 7 in a measured amount. The mixed gas enters the bottle 7 and the gas is ignited when it encounters the bottle body temperature. The gas burns inside the bottle 7, and the heat generated by the combustion regulates the temperature of the bottle body, thereby improving the uniformity of temperature distribution of the bottle body.

[0064] Furthermore, it also includes a thermal spraying cabinet 5; the bracket 41 is fixedly installed at the entrance of the thermal spraying cabinet 5, and the bottle conveying machine 2 passes through the thermal spraying cabinet 5.

[0065] The beneficial effects of this technical solution are as follows: A spray gun 42 is installed at the inlet of the thermal spraying cabinet 5. A mixture of gas and air is first quantitatively sprayed onto the mouth of the bottle 7. After the gas combustion improves the uniformity of temperature distribution on the bottle body, the thermal spraying process of the bottle 7 is carried out. The thermal spraying cabinet 5 is used to spray SnO2 or TiO2 droplets onto the bottle body surface with uniform temperature distribution. The droplets instantly vaporize and decompose upon encountering the residual heat of the bottle body to generate a thin film, thereby improving the strength and wear resistance of the bottle body.

[0066] The bottle detection assembly 49 is a through-beam photoelectric sensor, and the neck of the bottle 7 located on the bottle conveyor 2 passes between the transmitting end 491 and the receiving end 492 of the through-beam photoelectric sensor.

[0067] When the neck of bottle 7 enters between the transmitter 491 and receiver 492 of the through-beam photoelectric sensor, the light emitted by the transmitter 491 is blocked and weakened. The through-beam photoelectric sensor then sends a feedback signal to the valve controller 410, which in turn causes the spray gun 42 to spray a fixed amount of mixed gas toward the bottle opening, thus improving the accuracy of the spray.

[0068] The nozzle of the spray gun is 4±1mm higher than the bottle opening; ensure that the nozzle of the spray gun is aligned with the bottle opening; the transmitter and receiver of the through-beam photoelectric sensor are 10mm lower than the bottle opening; detect the position of the bottle in real time.

[0069] Furthermore, the gas supply assembly 47 includes a compressed gas storage tank 471 and a first pressure gauge 472. The outlet of the compressed gas storage tank 471 is connected to the first gas pipe 43, and the first pressure gauge 472 is installed at the outlet of the compressed gas storage tank 471.

[0070] The air supply assembly 48 includes a compressed air tank 481 and a second pressure gauge 482. The outlet of the compressed air tank 481 is connected to the second air pipe 44, and the second pressure gauge 482 is installed at the outlet of the compressed air tank 481.

[0071] The beneficial effects of this technical solution are as follows: the first pressure gauge 472 is used to detect the outlet pressure of the compressed gas storage tank 471, and the second pressure gauge 482 is used to detect the outlet pressure of the compressed air storage tank 481; when the pressure is high, the gas and air will flow to the spray gun 42 to mix and then be sprayed out; when the staff finds that the pressure is insufficient, they will prepare to replace the compressed gas storage tank 471 and the compressed air storage tank 481.

[0072] Furthermore, it also includes a first electromagnetic proportional valve 431 and a second electromagnetic proportional valve 441, with the first electromagnetic proportional valve 431 installed in the first air pipe 43 and the second electromagnetic proportional valve 441 installed in the second air pipe 44.

[0073] The beneficial effects of this technical solution are as follows: the first electromagnetic proportional valve 431 sets the gas flow rate entering the spray gun 42, and the second electromagnetic proportional valve 441 sets the air flow rate entering the spray gun 42, thereby precisely adjusting the ratio of the mixed gas and facilitating complete combustion of the gas inside the bottle 7. Both the first electromagnetic proportional valve 431 and the second electromagnetic proportional valve 441 are connected to an industrial computer via signal lines, and the industrial computer is also connected to a valve controller via signal lines; operators use the industrial computer to control the first electromagnetic proportional valve 431 and the second electromagnetic proportional valve 441.

[0074] Furthermore, the temperature-controlled gas spray gun device 4 also includes a first flow sensor 432 and a second flow sensor 442. The first flow sensor 432 is installed in the first gas pipe 43, and the second flow sensor 442 is installed in the second gas pipe 44.

[0075] The beneficial effects of this technical solution are: the first flow sensor 432 displays the gas flow rate, and the second flow sensor 442 displays the air flow rate, making it convenient for operators to observe. Both the first flow sensor 432 and the second flow sensor 442 are connected to an industrial computer via signal lines.

[0076] Furthermore, it also includes an infrared thermal imager 6, which is installed at the entrance of the thermal spray cabinet 5 and is located on one side of the transport direction of the bottle conveyor 2.

[0077] The beneficial effects of this technical solution are as follows: After the gas burns inside bottle 7, bottle 7 passes through infrared thermal imager 6 before entering the thermal spraying cabinet 5. Operators can observe the temperature distribution of bottle 7 from the color distribution on the display screen of infrared thermal imager 6, thus determining whether the temperature distribution of bottle 7 is uniform. For example, a temperature tolerance of ±3℃ for the bottle body is considered reasonable. Based on this, operators can determine whether to adjust the volume of the sprayed mixed gas and the mixing ratio of gas and air. Two infrared thermal imagers 6 are located on either side of the bottle conveyor 2, providing a more comprehensive detection of the bottle body temperature.

[0078] In the second embodiment, bottle 7 is a glass bottle. Existing row-type bottle-making machines produce shaped glass bottles. The air-cooling device of the row-type bottle-making machine initially cools the glass bottles, and the bottle-pushing device of the row-type bottle-making machine transfers the glass bottles to the bottle conveyor 2. The bottle conveyor 2 transports the glass bottles to the heat-spraying cabinet 5, and the bottle pusher 3 pushes the heat-sprayed glass bottles from the bottle conveyor 2 into the annealing furnace 1. The bottle pusher 3 can be referenced in the utility model patent with authorization announcement number CN222274389U, entitled: "A Bottle Pushing Device for an Annealing Furnace." The bottle body temperature of the glass bottle transferred from the air-cooling device to the bottle conveyor 2 is typically between 450°C and 550°C. The temperature distribution of the bottle body is uneven, meaning that the temperature in some areas of the bottle body is too high or too low, which leads to uneven distribution of internal stress within the bottle body. This can easily lead to poor uniformity of film thickness on the bottle body after passing through the thermal spraying cabinet 5; and can also easily lead to the bottle body still having large residual internal stress after passing through the annealing furnace 1, for example, the measured residual internal stress value of the bottle body is 40MPa to 50MPa, while the target value is 25MPa; resulting in low quality of the glass bottle. The present invention provides a spray gun 42 at the inlet of the thermal spraying cabinet 5. When the bottle detection component 49 detects a glass bottle passing under the spray gun 42, it sends a feedback signal to the valve controller 410. The valve controller 410 causes the spray gun 42 to quantitatively spray a mixture of gas and air into the bottle mouth. The mixed gas enters the glass bottle, and the gas is ignited when it encounters the bottle body temperature. The gas burns inside the glass bottle, and the heat generated by the combustion regulates the temperature of the bottle body, thereby improving the uniformity of temperature distribution on the bottle body.

[0079] Specifically, the bottle conveyor 2 transports glass bottles one by one to the thermal spraying cabinet 5. At the entrance of the thermal spraying cabinet 5, when the bottle detection component 49 detects a glass bottle, it sends a feedback signal to the valve controller 410. The valve controller 410 then simultaneously opens the first solenoid valve 45 and the second solenoid valve 46. Gas from the gas supply component 47 flows into the spray gun 42 through the first gas pipe 43, and air from the air supply component 48 flows into the spray gun 42 through the second gas pipe 44. Inside the spray gun 42, the gas and air mix and are then sprayed out from the nozzle. The valve controller 410 then... When the first electromagnetic switch valve 45 and the second electromagnetic switch valve 46 are closed, the mouth of the detected glass bottle is aligned with the nozzle of the spray gun 42, so that a metered amount of mixed gas is injected into the mouth of the glass bottle and enters the interior of the glass bottle; the gas in the mixed gas is ignited when it encounters the temperature of the glass bottle body (usually 450°C to 550°C), and the gas burns inside the glass bottle, and the heat generated is transferred to the glass bottle, regulating the temperature of the bottle body, thereby improving the uniformity of the temperature distribution of the bottle body; for example, the heat generated by the combustion of the gas makes the uniform temperature of the bottle body 580°C. After passing through the heat spraying cabinet 5, the glass bottles with uniform temperature distribution have good uniformity in film thickness. After exiting the heat spraying cabinet 5, the glass bottles are pushed from the bottle conveyor 2 by the bottle pusher 3 into the mesh belt conveyor 12 of the annealing furnace 1. The mesh belt conveyor 12 delivers the glass bottles to the entrance of the high-temperature zone 111 of the annealing furnace 1. The glass bottles pass through the high-temperature zone 111 and the slow cooling zone 112 of the annealing furnace 1 in sequence, effectively reducing the residual internal stress of the glass bottle body. For example, there are three high-temperature zones 111, which are 570°C, 560°C and 550°C respectively from the entrance to the exit. The glass bottles move in the annealing furnace 1 for one and a half hours.

[0080] The valve controller 410 is a PLC or microcontroller based on existing technology. When the valve controller 410 receives a signal from the glass bottle detection sensor, it simultaneously outputs an open signal to the first solenoid valve 45 and the second solenoid valve 46. After a set time, it then simultaneously outputs a close signal to both valves. This causes the spray gun 42 to spray a mixed gas when its nozzle is aligned with the bottle opening, and stops spraying the mixed gas when it leaves the bottle opening. Different types of glass bottles have different shapes and sizes, and their volumes and opening diameters also vary. During the production line debugging phase, the required flow rate of the mixed gas for the corresponding type of glass bottle is measured, and then the opening and closing times of the solenoid valves are set. Because the glass bottle itself has a high temperature (typically 450℃ to 550℃) before entering the thermal spraying cabinet 5, the air inside the bottle rises due to the heat and leaves the bottle opening. Therefore, there is relatively little air inside the glass bottle. When the mixed gas is sprayed into the glass bottle, the fuel gas provided by the mixed gas is ignited, and the air supplied by the mixed gas supplements the combustion, with the oxidation in the air acting as an auxiliary combustion agent. The glass bottles on a bottle conveyor 2 are of the same type, arranged at intervals and passing one by one through a spray gun 42, which sprays a fixed amount of mixed gas toward the mouth of each glass bottle.

[0081] The main working principle of the bottle stress relief equipment is as follows: A compressed gas storage tank 471 and a compressed air storage tank 481 are pre-set, along with a first electromagnetic proportional valve 431 and a second electromagnetic proportional valve 441. The bottle conveyor 2 transports the glass bottles to the thermal spraying cabinet 5. The glass bottles pass under the spray gun 42 one by one. The bottle detection component 49 acts as a glass bottle detection sensor. Each time a glass bottle is detected, the valve controller 410 controls the operation of the first electromagnetic switch valve 45 and the second electromagnetic switch valve 46, causing the spray gun 42 to perform a spraying action and spray out a measured amount of mixed gas. The mixed gas exits from the bottle neck... Upon entering the glass bottle, the gas mixture ignites upon contact with the bottle's temperature, aided by oxygen in the air. The gas burns inside the bottle, and the heat generated regulates the bottle's temperature, thus improving the uniformity of temperature distribution. The glass bottle then passes through an infrared thermal imager 6, allowing staff to monitor its temperature distribution. After passing through a heat spraying cabinet 5, the bottle is pushed from the bottle conveyor 2 by a bottle pusher 3 into the mesh belt conveyor 12 of the annealing furnace 1. The bottle sequentially passes through the high-temperature zone 111 and the slow-cooling zone 112 of the annealing furnace 1, which helps improve the quality of the glass bottle.

[0082] For other parts not described herein, please refer to the first embodiment of the present invention.

[0083] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An energy-saving annealing furnace, characterized in that: It includes a furnace body, a mesh belt conveyor, a first electric heating device, a second electric heating device, a circulating fan device, and a hot gas extraction device; The furnace body is divided into a high-temperature zone and a slow-cooling zone. The high-temperature zone is located at the front of the furnace body, and the slow-cooling zone is located at the rear of the furnace body. The first electric heating device and the circulating fan device are both installed in the high-temperature zone, and the second electric heating device and the hot gas extraction device are both installed in the slow-cooling zone. The mesh belt conveyor device passes through the high-temperature zone and the slow-cooling zone. The hot air extraction device includes an intake fan, an exhaust fan, an air supply pipe, an air delivery pipe, an intake pipe, an exhaust pipe, a nozzle, a fixed frame, and an air filter; The air filter is installed at the inlet of the air supply pipe. The outlet of the air supply pipe is connected to the inlet of the air intake fan. The outlet of the air intake fan is connected to the inlet of the air delivery pipe. The outlet of the air delivery pipe communicates with the top of the slow cooling zone. The second electric heating device is located at the front end of the slow cooling zone. The outlet of the air delivery pipe faces the second electric heating device. The inlet of the suction pipe communicates with the top of the slow cooling zone and is also located behind the second electric heating device. The outlet of the suction pipe is connected to the inlet of the exhaust fan. The outlet of the exhaust fan is connected to the inlet of the exhaust pipe. The outlet of the exhaust pipe is connected to the nozzle. The fixed frame is located in front of the inlet of the high-temperature zone and is also located above the mesh belt conveyor. The nozzle is located on the fixed frame and is used to spray gas toward the mesh belt conveyor. The flow rate of the air delivery pipe is greater than the flow rate of the suction pipe.

2. The energy-saving annealing furnace according to claim 1, characterized in that: The hot gas extraction device also includes a gas distribution pipe, the top inlet of which is connected to the outlet of the exhaust pipe, and the bottom outlet of which is connected to the jet nozzle. A plurality of jet nozzles are evenly spaced along the inlet width direction of the high-temperature zone.

3. The energy-saving annealing furnace according to claim 1, characterized in that: The outlet of the gas supply pipe is downward and inclined toward the outlet direction of the slow cooling zone.

4. The energy-saving annealing furnace according to claim 1, characterized in that: The shaft of the air intake fan is connected to the shaft of the exhaust fan via a coupling. The air intake fan is an active fan, and the exhaust fan is a passive fan.

5. An energy-saving annealing furnace according to claim 1, characterized in that: The first electric heating device includes a horizontal frame, an electric heating tube, a temperature sensor, and a temperature controller. The electric heating tube is fixedly connected to the horizontal frame. Multiple electric heating tubes are evenly spaced along the transport direction of the mesh belt conveyor. The horizontal frame is fixedly connected to the interior of the furnace body. The temperature sensor is installed inside the furnace body, and the temperature controller is installed outside the furnace body. The temperature sensor is electrically connected to the temperature controller, and the temperature controller is also electrically connected to the electric heating tube. The circulating fan device includes a fan motor and a fan wheel. A rotating hole is provided on the top side of the furnace body. The fan motor is located outside the furnace body, and the fan wheel is located inside the furnace body. The output shaft of the fan motor passes through the rotating hole and is fixedly connected to the center of the fan wheel. When the fan motor drives the fan wheel, a circulating airflow is formed inside the furnace body.

6. A bottle stress relief device, characterized in that: It includes an annealing furnace, a bottle conveying machine, a bottle pusher, and a temperature-controlled gas spray gun device, wherein the annealing furnace is an energy-saving annealing furnace as described in any one of claims 1 to 5; The temperature-controlled gas spray gun device includes a bracket, a spray gun, a first gas pipe, a second gas pipe, a first electromagnetic switch valve, a second electromagnetic switch valve, a gas supply component, an air supply component, a bottle detection component, and a valve controller. The spray gun is fixedly connected to the bracket, which is fixedly installed above the bottle conveyor. The spray nozzle of the spray gun faces downward. The bottle inspection assembly is fixedly connected to the bracket and is located between the spray gun and the bottle conveyor. The bottle inspection assembly is electrically connected to the valve controller, which is also electrically connected to the first electromagnetic switch valve and the second electromagnetic switch valve. The first air inlet of the spray gun is connected to the gas supply assembly through a first gas pipe, and the second air inlet of the spray gun is connected to the gas supply assembly through a second gas pipe. The first electromagnetic switch valve is installed in the first gas pipe, and the second electromagnetic switch valve is installed in the second gas pipe. The bottle pusher and the annealing furnace are located on opposite sides of the bottle conveyor. The bottle conveyor first passes through the temperature-controlled gas spray gun device and then through the annealing furnace. The bottle pusher pushes the bottles on the bottle conveyor to the mesh belt conveyor of the annealing furnace. The mesh belt conveyor of the annealing furnace causes the bottles to pass through the high-temperature zone and the slow-cooling zone of the annealing furnace in sequence.

7. The bottle stress relief device according to claim 6, characterized in that: It also includes a thermal spraying cabinet; the bracket is fixedly installed at the entrance of the thermal spraying cabinet, and the bottle conveying machine passes through the thermal spraying cabinet.

8. A bottle stress relief device according to claim 6, characterized in that: The gas supply assembly includes a compressed gas storage tank and a first pressure gauge. The outlet of the compressed gas storage tank is connected to the first gas pipe, and the first pressure gauge is installed at the outlet of the compressed gas storage tank. The air supply assembly includes a compressed air tank and a second pressure gauge. The outlet of the compressed air tank is connected to the second air pipe, and the second pressure gauge is installed at the outlet of the compressed air tank.

9. A bottle stress relief device according to claim 6, characterized in that: The temperature-controlled gas spray gun device also includes a first flow sensor and a second flow sensor. The first flow sensor is installed in the first gas pipe, and the second flow sensor is installed in the second gas pipe.

10. A bottle stress relief device according to claim 7, characterized in that: The temperature-controlled gas spray gun device also includes an infrared thermal imager, which is installed at the entrance of the hot spray cabinet and on one side of the transport direction of the bottle conveyor.

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