Thermal treatment tempering furnace for compression spring

Abstract

The invention discloses a compression spring heat treatment tempering furnace, and relates to the technical field of spring heat treatment, the compression spring heat treatment tempering furnace comprises a bottom plate and a furnace body fixed on the bottom plate, the furnace body comprises a conveying mechanism and a heating cavity mechanism, and a lower reflecting plate and an upper reflecting plate are respectively fixed in the conveying mechanism and the heating cavity mechanism. The upper reflecting plate, the lower reflecting plate and the arc-shaped surface are arranged to change the motion trail of hot airflow in the furnace body, and the air curtain mechanism is arranged, so that high-speed airflow can be jetted downwards at the feed port and the discharge port of the furnace body, a continuous air barrier is formed in a door opening area, and the airflow barrier can effectively prevent air inside and outside the tempering furnace from being in direct contact; and moreover, the airflow jetted downwards is blown to the cambered surface of the lower reflecting plate, the airflow can flow back upwards and forcibly form turbulent mixing with the airflow in the furnace, the vertical temperature gradient of heat convection is effectively weakened, and then the temperature in the furnace is mixed more uniformly.

Description

Technical Field

[0001] The present invention relates to the technical field of spring heat treatment, and specifically relates to a tempering furnace for compression spring heat treatment. Background Art

[0002] A spring is a mechanical part that works using elasticity. A part made of an elastic material deforms under an external force and returns to its original shape after the external force is removed. Generally, it is made of spring steel. Springs come in a complex variety. Classified by shape, there are mainly helical springs, scroll springs, leaf springs, special-shaped springs, etc. The tempering of compression springs is crucial for their performance. Changing the performance of compression springs through heat treatment processes has become an important development direction. As a very important link in the heat treatment process, tempering generally requires a tempering furnace to complete the tempering process. The tempering furnace is used for the tempering of general metal machine parts in the air, as well as the heat treatment of light alloy machine parts such as aluminum alloy die-castings, pistons, and aluminum plates, including quenching and annealing. The outer shell is welded from steel plates and steel sections.

[0003] However, the existing tempering furnaces still have the following deficiencies when in use: 1. The temperature uniformity inside the tempering furnace is poor. Thermal energy is easily accumulated in the static air area inside the tempering furnace, resulting in temperature stratification. Moreover, the open feeding and discharging ports of the tempering furnace cause the thermal energy inside the furnace to easily escape. The energy consumption is high, and the heating and cooling rates are difficult to accurately control, leading to a large dispersion in the performance of the springs, affecting production efficiency and the stability of product quality.

[0004] 2. The waste gas discharged from the tempering furnace is difficult to collect. The waste gas generated during the tempering process contains high-temperature decomposition products of quenching oil and organic waste gas, which pose significant hazards to the human respiratory system and the environment. The pollutant concentration of the untreated tempering waste gas usually exceeds the standard by 3 - 5 times. Moreover, the temperature of the waste gas discharged from the furnace is relatively high, and the waste heat of the high-temperature waste gas cannot be recovered, resulting in economic waste.

[0005] Therefore, we propose a tempering furnace for compression spring heat treatment to solve the problems raised above. Summary of the Invention

[0006] The purpose of the present invention is to provide a tempering furnace for compression spring heat treatment, which can change the movement trajectory of the hot air flow, reduce temperature stratification, and a certain amount of heat air barrier will be formed in the open door area of the tempering furnace, reducing the escape of thermal energy. Moreover, the thermal energy of the air barrier is recovered from the heat of the waste gas, which not only cools down the temperature of the waste gas for subsequent filtration treatment but also does not waste the thermal energy of the high-temperature waste gas, thus having high economic and environmental benefits, and solving the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A heat treatment tempering furnace for a compression spring, comprising a bottom plate and a furnace body fixed thereon. The furnace body includes a conveying mechanism and a heating chamber mechanism. A lower reflector and an upper reflector are respectively fixed in the conveying mechanism and the heating chamber mechanism. Exhaust pipes are fixedly communicated with the top of the heating chamber mechanism. A heat exchange mechanism is arranged on the top of the bottom plate. Air curtain mechanisms are arranged at both ends of the heating chamber mechanism. An exhaust gas treatment mechanism is arranged on the top of the bottom plate. Infrared thermal imagers are respectively arranged at both ends of the heating chamber mechanism; The heat exchange mechanism includes a smoke tube heat exchanger fixed on the top of the bottom plate. A low-temperature gas inlet is fixedly communicated with one side wall of the smoke tube heat exchanger. Normal temperature air that needs to perform heat exchange with high-temperature exhaust gas enters the smoke tube heat exchanger from the low-temperature gas inlet, and the exhaust gas can be cooled before filtering the exhaust gas.

[0008] The air curtain mechanism includes two air outlet hoods. The two air outlet hoods are respectively fixed at both ends of the heating chamber mechanism. A primary flow dividing plate and a secondary flow dividing plate are respectively fixed in the air outlet hoods, and high-speed hot air flow can be blown downward from the air outlet hoods.

[0009] The exhaust gas treatment mechanism includes an electrostatic precipitator, an activated carbon adsorption tower and an emission tower fixed on the top of the bottom plate. The electrostatic precipitator can filter and discharge the cooled exhaust gas.

[0010] Preferably, the lower reflector is fixed below the mesh conveyor belt of the conveying mechanism, and the lower reflector is in a concave shape. The upper reflector is fixed above the electric heating wire in the heating chamber mechanism. The bottom end of the exhaust pipe passes through the bottom of the upper reflector. The upper reflector is in an arch shape. The hot air flow flowing up and down in the heating chamber mechanism contacts the arc-shaped lower reflector and upper reflector, and the movement track of the hot air flow can be changed.

[0011] Preferably, the two infrared thermal imagers are respectively fixed on the tops of adjacent air outlet hoods. Transparent observation windows are arranged at both ends of the heating chamber mechanism. The detection ends of the infrared thermal imagers respectively face the adjacent transparent observation windows. The infrared thermal imagers can monitor the thermal energy field distribution in the heating chamber mechanism through the transparent observation windows.

[0012] Preferably, the heat exchange mechanism further includes a blower fixed on the top of the smoke tube heat exchanger. A low-temperature pipe is fixedly communicated between the air outlet of the blower and the low-temperature gas inlet. A high-temperature gas outlet is also fixedly communicated with one side wall of the smoke tube heat exchanger.

[0013] Preferably, a high-temperature exhaust gas inlet and a low-temperature exhaust gas outlet are respectively fixedly communicated with both ends of the smoke tube heat exchanger. One end of the exhaust pipe is fixedly communicated with the high-temperature exhaust gas inlet.

[0014] Preferably, the air curtain mechanism further includes a high-temperature resistant air storage tank fixed to the top of the bottom plate. A high-temperature pipe is fixedly connected between the air inlet end and the high-temperature gas outlet of the high-temperature resistant air storage tank. A blower is fixed to the top of the heating chamber mechanism. A heat preservation pipe is fixedly connected between the air outlet end of the high-temperature resistant air storage tank and the air inlet end of the blower.

[0015] Preferably, a tee pipe is arranged above each of the two air outlet hoods. Two ends of each of the two tee pipes are respectively fixedly connected to the top of the adjacent air outlet hood. The other ends of the two tee pipes are fixedly connected to a first connecting pipe. A second connecting pipe is fixedly connected between the air outlet end of the blower and the first connecting pipe.

[0016] Preferably, slot holes are arrayed on the top of the first-stage flow splitting plate, and round holes are equidistantly arranged on the top of the second-stage flow splitting plate. The first-stage flow splitting plate and the second-stage flow splitting plate have the same specifications. The slot holes and the round holes are staggered. An electromagnetic valve is installed on the surface of the heat preservation pipe.

[0017] Preferably, the waste gas treatment mechanism further includes an induced draft fan fixed to the top of the bottom plate. A first conveying pipe is fixedly connected between the air inlet end of the electrostatic precipitator and the low-temperature waste gas outlet.

[0018] Preferably, a second conveying pipe is fixedly connected between the air outlet end of the electrostatic precipitator and the air inlet end of the activated carbon adsorption tower. An induced draft pipe is fixedly connected between the air outlet end of the activated carbon adsorption tower and the air inlet end of the induced draft fan. A discharge pipe is fixedly connected between the air outlet end of the induced draft fan and the air inlet end of the discharge tower.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By providing an upper reflection plate and a lower reflection plate, the arc surface changes the movement track of the hot air flow in the furnace body. The setting of the air curtain mechanism can spray high-speed air downward at the furnace body feeding port and discharging port, forming a continuous air barrier in the door opening area. This air flow barrier can effectively block the direct contact between the air inside and outside the tempering furnace, reduce the heat energy dissipation, and play a heat preservation effect. And the air flow sprayed downward blows to the arc surface of the lower reflection plate, and the air flow can flow upward in a reverse manner, forcing turbulent mixing with the air flow in the furnace, effectively weakening the vertical temperature gradient of heat convection, and then making the temperature in the furnace more evenly mixed. The infrared thermal imager can stably measure the temperature in the furnace and accurately capture abnormal temperature distribution conditions so that personnel can determine the temperature environment in the furnace.

[0020] 2. The equipment of the present invention recovers the waste heat of high-temperature exhaust gas through a heat exchange mechanism, and the recovered heat energy is transported to the air curtain mechanism, which can form a relatively hot air barrier in the door opening area, helping to compensate for the influence of temperature difference in the air barrier area, avoiding the sudden drop in temperature in the furnace mouth area due to excessive temperature difference, maintaining the high-temperature environment in the tempering furnace, reducing energy consumption, and ensuring the stability of the subsequent filter materials when the cooled exhaust gas is further filtered by the exhaust gas treatment mechanism. Thus, through multi-stage filtration, the compound components and ultrafine particles contained in the exhaust gas can be effectively removed, enabling the exhaust gas of the tempering furnace to meet the emission standards and improving the economic and environmental benefits of the tempering furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a first perspective three-dimensional view of the overall structure in a compression spring heat treatment tempering furnace of the present invention; Figure 2 is a second perspective three-dimensional view of the overall structure in a compression spring heat treatment tempering furnace of the present invention; Figure 3 is a three-dimensional view of the structure of the furnace body part of a compression spring heat treatment tempering furnace of the present invention, with a transparent observation window and an infrared thermal imager; Figure 4 is a three-dimensional view of the structure of the upper and lower reflecting plates with the furnace body part of a compression spring heat treatment tempering furnace of the present invention cut open; Figure 5 is a three-dimensional view of the partial structure of the air curtain mechanism in a compression spring heat treatment tempering furnace of the present invention, and the cut-open structure of the air outlet hood; Figure 6 is an enlarged three-dimensional view of part A in a compression spring heat treatment tempering furnace of the present invention; Figure 7 is an enlarged three-dimensional view of the structure on the smoke tube heat exchanger in a compression spring heat treatment tempering furnace of the present invention.

[0022] Figure 8 is a three-dimensional view of the high-temperature exhaust gas inlet structure of the smoke tube heat exchanger in a compression spring heat treatment tempering furnace of the present invention; Figure 9 is a three-dimensional view of the partial structure of the exhaust gas treatment mechanism in a compression spring heat treatment tempering furnace of the present invention.

[0023] In the figure: 1, bottom plate; 2, furnace body; 201, conveying mechanism; 202, heating chamber mechanism; 203, lower reflector; 204, upper reflector; 205, transparent observation window; 3, exhaust pipe; 4, heat exchange mechanism; 401, smoke tube heat exchanger; 402, low-temperature gas inlet; 403, blower; 404, low-temperature pipe; 405, high-temperature gas outlet; 406, high-temperature exhaust gas inlet; 407, low-temperature exhaust gas outlet; 5, air curtain mechanism; 501, air outlet hood; 502, primary shunt plate; 503, secondary shunt plate; 504, high-temperature resistant gas storage tank; 505, high-temperature pipe; 506, air delivery fan; 507, heat preservation pipe; 508, three-way pipe; 509, first connecting pipe; 510, second connecting pipe; 511, slot hole; 512, round hole; 513, solenoid valve; 6, exhaust gas treatment mechanism; 601, electrostatic precipitator; 602, activated carbon adsorption tower; 603, emission tower; 604, induced draft fan; 605, first conveying pipe; 606, second conveying pipe; 607, induced draft air pipe; 608, emission pipe; 7, infrared thermal imager. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to the attached Figure 1 - attached Figure 9As shown in the figure, the present invention provides a technical solution: a compression spring heat treatment tempering furnace, which includes a bottom plate 1 and a furnace body 2 fixed thereon. The furnace body 2 includes a conveying mechanism 201 and a heating chamber mechanism 202. A lower reflector 203 and an upper reflector 204 are respectively fixed in the conveying mechanism 201 and the heating chamber mechanism 202. Exhaust pipes 3 are fixedly communicated with the top of the heating chamber mechanism 202. A heat exchange mechanism 4 is arranged on the top of the bottom plate 1. Air curtain mechanisms 5 are arranged at both ends of the heating chamber mechanism 202. An exhaust gas treatment mechanism 6 is arranged on the top of the bottom plate 1. Infrared thermal imagers 7 are respectively arranged at both ends of the heating chamber mechanism 202. The lower reflector 203 is fixed below the mesh conveyor belt of the conveying mechanism 201, and the lower reflector 203 is concave. The upper reflector 204 is fixed above the electric heating wire in the heating chamber mechanism 202. The bottom end of the exhaust pipe 3 passes through the bottom of the upper reflector 204, and the upper reflector 204 is arch-shaped. The hot air flow flowing up and down in the heating chamber mechanism 202 contacts the arc-shaped lower reflector 203 and upper reflector 204, which can change the movement trajectory of the hot air flow. The two infrared thermal imagers 7 are respectively fixed on the top of the adjacent air outlet hood 501. Transparent observation windows 205 are arranged at both ends of the heating chamber mechanism 202. The detection ends of the infrared thermal imagers 7 are respectively oriented towards the adjacent transparent observation windows 205. The infrared thermal imagers 7 can monitor the thermal energy field distribution in the heating chamber mechanism 202 through the transparent observation windows 205.

[0026] Example 1, according to Figure 2 、 Figure 7 and Figure 8 As shown, the heat exchange mechanism 4 includes a smoke tube heat exchanger 401 fixed on the top of the bottom plate 1. A low-temperature gas inlet 402 is fixedly communicated with one side wall of the smoke tube heat exchanger 401. The normal-temperature air that needs to perform heat exchange with the high-temperature exhaust gas enters the smoke tube heat exchanger 401 from the low-temperature gas inlet 402, and can cool the exhaust gas before filtering the exhaust gas. The heat exchange mechanism 4 further includes a blower 403 fixed on the top of the smoke tube heat exchanger 401. A low-temperature pipe 404 is fixedly communicated between the air outlet of the blower 403 and the low-temperature gas inlet 402. A high-temperature gas outlet 405 is also fixedly communicated with one side wall of the smoke tube heat exchanger 401. High-temperature exhaust gas inlets 406 and low-temperature exhaust gas outlets 407 are respectively fixedly communicated with both ends of the smoke tube heat exchanger 401. One end of the exhaust pipe 3 is fixedly communicated with the high-temperature exhaust gas inlet 406.

[0027] The effects achieved by the entire Embodiment 1 are as follows: Four ventilation ports are respectively provided on the smoke tube heat exchanger 401, namely the low-temperature gas inlet 402, the high-temperature gas outlet 405, the high-temperature waste gas inlet 406, and the low-temperature waste gas outlet 407. An induced draft fan 604 is provided at the rear end of the waste gas treatment mechanism 6. The high-temperature waste gas in the furnace is sent into the smoke tube heat exchanger 401 through the waste gas pipe 3 and the high-temperature waste gas inlet 406, and performs heat exchange with the normal-temperature air reversely sent by the blower 403 from the low-temperature pipe 404 and the low-temperature gas inlet 402. The hot air after heat exchange is transported to the high-temperature resistant gas storage tank 504 through the high-temperature gas outlet 405 and the high-temperature pipe 505 for storage, so as to have sufficient hot air reserves during use. After the high-temperature waste gas undergoes heat exchange, it becomes low-temperature waste gas, which is transported to the electrostatic precipitator 601 through the low-temperature waste gas outlet 407 and the first conveying pipe 605 for subsequent filtration, ensuring the stability of the subsequent filter material, avoiding the impact of high-temperature waste gas on the filtration performance, and being able to provide hot air for the air curtain mechanism 5 that is sent back. The air curtain mechanism 5 can form an air barrier at the feeding port and the discharging port where the heating cavity mechanism 202 is open, and can also compensate for the temperature difference effect in the air barrier area, avoiding the sudden drop in the temperature of the furnace mouth area due to excessive temperature difference, reducing the heat loss in the furnace, and assisting in heating up.

[0028] Embodiment 2, according to Figure 2 , Figure 3 , Figure 5 and Figure 6 as shown, the air curtain mechanism 5 includes two air outlet hoods 501, and the two air outlet hoods 501 are respectively fixed at both ends of the heating cavity mechanism 202. A primary flow dividing plate 502 and a secondary flow dividing plate 503 are both fixed inside the air outlet hoods 501. The high-speed hot air flow can be blown downward from the air outlet hoods 501. The air curtain mechanism 5 further includes a high-temperature resistant gas storage tank 504 fixed on the top of the bottom plate 1. A high-temperature pipe 505 is fixedly connected between the air inlet end of the high-temperature resistant gas storage tank 504 and the high-temperature gas outlet 405. A blower 506 is fixed on the top of the heating cavity mechanism 202. A heat preservation pipe 507 is fixedly connected between the air outlet end of the high-temperature resistant gas storage tank 504 and the air inlet end of the blower 506. Three-way pipes 508 are arranged above the two air outlet hoods 501. Two ends of the two three-way pipes 508 are respectively fixedly connected to the tops of the adjacent air outlet hoods 501, and the other ends of the two three-way pipes 508 are fixedly connected to a first connecting pipe 509. A second connecting pipe 510 is fixedly connected between the air outlet end of the blower 506 and the first connecting pipe 509. Slot holes 511 are arrayed on the top of the primary flow dividing plate 502, and round holes 512 are equidistantly arranged on the top of the secondary flow dividing plate 503. The primary flow dividing plate 502 and the secondary flow dividing plate 503 have the same specifications, and the slot holes 511 and the round holes 512 are staggered. A solenoid valve 513 is installed on the surface of the heat preservation pipe 507.

[0029] The effects achieved by the entire Embodiment 2 are as follows: When the air curtain mechanism 5 needs to be used, the air blower 506 sucks out the hot air in the high-temperature resistant air storage tank 504 through the heat preservation pipe 507 and transports it into the second connecting pipe 510. The hot air enters the first connecting pipe 509 through the second connecting pipe 510, and the hot air enters the three-way pipes 508 at both ends through the first connecting pipe 509. Subsequently, the hot air enters the air outlet hood 501 through two of the ends of the three-way pipe 508. The primary shunt plate 502 can perform primary shunting on the hot air transported through the three-way pipe 508. The secondary shunt plate 503 can further shunt the hot air after primary shunting. The specification of the slot holes 511 is larger than that of the round holes 512, and the primary shunt plate 502 and the secondary shunt plate 503 with the same specification are respectively fixed up and down in the air outlet hood 501. The slot holes 511 and the round holes 512 that are staggered are spatially misaligned, so that the air that is sent back can be evenly shunted through the staggered channels, making the formed air barrier stable. The solenoid valve 513 can be used to control the proportion of the hot air sent back. Cooperating with the air blower 506, the stability of the air barrier at the door opening can be further improved. And when the air curtain mechanism 5 does not need to be used, the high-temperature resistant air storage tank 504 is closed to prevent the stored hot air from escaping.

[0030] Embodiment 3, according to Figure 2 and Figure 9 As shown, the waste gas treatment mechanism 6 includes an electrostatic precipitator 601, an activated carbon adsorption tower 602, and an emission tower 603 fixed on the top of the bottom plate 1. The electrostatic precipitator 601 can filter and discharge the cooled waste gas. The waste gas treatment mechanism 6 also includes a draft fan 604 fixed on the top of the bottom plate 1. The intake end of the electrostatic precipitator 601 is fixedly connected to the low-temperature waste gas outlet 407 by a first delivery pipe 605. The outlet end of the electrostatic precipitator 601 is fixedly connected to the intake end of the activated carbon adsorption tower 602 by a second delivery pipe 606. The outlet end of the activated carbon adsorption tower 602 is fixedly connected to the intake end of the draft fan 604 by a draft pipe 607. The outlet end of the draft fan 604 is fixedly connected to the intake end of the emission tower 603 by an emission pipe 608.

[0031] The effects achieved by the entire Embodiment 3 are as follows: After heat exchange in the smoke tube heat exchanger 401, the cooled waste gas can be transported to the electrostatic precipitator 601 through the low-temperature waste gas outlet 407 and the first conveying pipe 605. The soot particles in the waste gas are charged and adsorbed by the high-voltage electric field, and the acidic aerosol in the flue gas is removed synchronously. Subsequently, the waste gas enters the activated carbon adsorption tower 602 through the second conveying pipe 606. Through the porous structure and large specific surface area of the activated carbon adsorption tower 602, organic pollutants in the waste gas, such as volatile organic compounds like benzene series, sulfides, esters, and hydrocarbons, can be effectively adsorbed. The activated carbon impregnated with alkaline substances after special treatment can intercept acidic gas molecules through pores, and through chemical neutralization, the alkaline components react with acidic gases to form salts, reducing the emission of corrosive gases. Thus, the organic matter, acidic gases, and odors in the waste gas can be efficiently purified. The emission tower 603 can discharge the treated waste gas into the high altitude. In reality, the electrostatic precipitator 601, the activated carbon adsorption tower 602, the emission tower 603, and the induced draft fan 604 can be installed and placed accordingly according to the actual situation.

[0032] The working principle of the entire device is as follows: When in use, the operator turns on the heating unit of the furnace body 2 to raise the temperature in the heating chamber mechanism 202 of the furnace body 2 to an appropriate temperature. When the heating unit is turned on, the blower 403, the air blower 506, and the induced draft fan 604 are turned on together according to the program settings, and the solenoid valve 513 is opened in cooperation. The air blower 506 pumps the relatively hot air stored in the high-temperature resistant gas storage tank 504 into the first connecting pipe 509 and the second connecting pipe 510 through the heat preservation pipe 507 at a set rate, and through the distribution of the two three-way pipes 508, the high-temperature air enters the air outlet hood 501. The high-temperature air first undergoes primary flow distribution through the slots 511 of the first-stage flow dividing plate 502, and finally passes through the round holes 512 of the second-stage flow dividing plate 503 for secondary flow distribution, so that the high-temperature air can be evenly discharged downward from the air outlet hood 501. When the high-speed gas passes through the mesh conveyor belt and contacts and is guided by the arc surface of the lower reflector plate 203, the high-speed gas can flow upward in a reverse direction. The function of the air curtain mechanism 5, firstly, can provide a dynamic air flow for the hot air in the heating chamber mechanism 202, enabling the heat energy generated by the electric heating wire to circulate, facilitating the maintenance of a uniform temperature in the heating chamber mechanism 202; secondly, it can assist in heating up, avoiding a sudden drop in the temperature in the furnace mouth area due to excessive temperature difference, compensating for the influence of the temperature difference, reducing heat loss in the furnace, and effectively blocking the penetration of external air. When the air curtain mechanism 5 is not required, the air blower 506 and the solenoid valve 513 are closed together; During the air replenishment process of the air blower 506, the excess gas in the heating chamber mechanism 202 needs to be discharged. The induced draft fan 604 is started, and the high-temperature waste gas in the furnace will be sent into the tubular heat exchanger 401 through the waste gas pipe 3 and the high-temperature waste gas inlet 406. At the same time, the blower 403 is started. The blower 403 conveys the ambient normal-temperature air into the tubular heat exchanger 401 through the low-temperature pipe 404 and the low-temperature gas inlet 402. The high-temperature waste gas and the normal-temperature air flow in opposite directions. At this time, the low-temperature normal-temperature air exchanges heat with the high-temperature waste gas inside it, causing the waste gas to cool down and the normal-temperature air to heat up. The cooled waste gas flows backward through the low-temperature waste gas outlet 407 and the first conveying pipe 605, first enters the electrostatic precipitator 601 to adsorb fine particles, and then enters the activated carbon adsorption tower 602 through the second conveying pipe 606. After multi-stage treatment in the activated carbon adsorption tower 602, components such as benzene series compounds can be adsorbed. Subsequently, the qualified gas after treatment flows upward and is discharged into the discharge tower 603 through the induced air pipe 607 and the discharge pipe 608. The heated high-temperature air is conveyed and stored in the high-temperature resistant gas storage tank 504 through the high-temperature gas outlet 405 and the high-temperature pipe 505. When hot air is needed to form an air barrier at the two door openings of the furnace body 2's feeding port and discharging port, the solenoid valve 513 cooperates with the air blower 506 to control the air volume and air speed of the hot air supply, ensuring the stability of the air barrier at the door opening; When the temperature in the furnace rises to the set value, the spring that needs to be tempered is conveyed into the heating chamber mechanism 202 of the furnace body 2 through the conveying mechanism 201 for tempering. The lower reflector 203 is concave, and the upper reflector 204 is arch-shaped, so that the two arc-shaped upper reflector 204 and lower reflector 203 can make the space in the heating chamber mechanism 202 form a relatively smooth state. When the air flow in the heating chamber mechanism 202 contacts the arc surfaces of the upper reflector 204 and the lower reflector 203, the movement trajectory of the hot air flow can be changed, and the air flow of the air barrier can flow back smoothly, and the hot air flow is forced to form a turbulent mixture with the reverse flow of the air barrier, effectively weakening the vertical temperature gradient of heat convection, destroying the temperature stratification structure. The material of the air outlet hood 501 has a very low thermal conductivity, which can play a heat insulation effect and avoid affecting the service life of the infrared thermal imager 7 fixed on it. The material of the transparent observation window 205, the transparent observation window 205 selects a material with a high transmittance in the infrared band, such as quartz glass or sapphire material. Its transmission band matches the working wavelength of the thermal imager. The size of the transparent observation window 205 covers the viewing angle of the infrared thermal imager 7, ensuring that the temperature field situation in the furnace will not be disturbed. The infrared thermal imager 7 can feedback the temperature field distribution to the control terminal in real time, facilitating the program of the control terminal to dynamically adjust the heating power output.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat treatment tempering furnace for a compression spring, characterized in that: It includes a bottom plate (1) and a furnace body (2) fixed thereon. The furnace body (2) includes a conveying mechanism (201) and a heating chamber mechanism (202). A lower reflector (203) and an upper reflector (204) are respectively fixed in the conveying mechanism (201) and the heating chamber mechanism (202). Exhaust pipes (3) are fixedly connected and communicated at the top of the heating chamber mechanism (202). A heat exchange mechanism (4) is arranged at the top of the bottom plate (1). Air curtain mechanisms (5) are arranged at both ends of the heating chamber mechanism (202). An exhaust gas treatment mechanism (6) is arranged at the top of the bottom plate (1). Infrared thermal imagers (7) are respectively arranged at both ends of the heating chamber mechanism (202); The heat exchange mechanism (4) includes a smoke tube heat exchanger (401) fixed at the top of the bottom plate (1). A low-temperature gas inlet (402) is fixedly connected and communicated with one side wall of the smoke tube heat exchanger (401). Normal-temperature air that needs to conduct heat exchange with high-temperature exhaust gas enters the smoke tube heat exchanger (401) from the low-temperature gas inlet (402), and the exhaust gas can be cooled before filtering the exhaust gas. The air curtain mechanism (5) includes two air outlet hoods (501). The two air outlet hoods (501) are respectively fixed at both ends of the heating chamber mechanism (202). A primary flow splitter plate (502) and a secondary flow splitter plate (503) are fixed in each of the air outlet hoods (501). High-speed hot air flows can blow downward from the air outlet hoods (501). The exhaust gas treatment mechanism (6) includes an electrostatic precipitator (601), an activated carbon adsorption tower (602), and an emission tower (603) fixed at the top of the bottom plate (1). The electrostatic precipitator (601) can filter and discharge the cooled exhaust gas.

2. The tempering furnace for heat treatment of a compression spring according to claim 1, wherein: The lower reflector (203) is fixed below the mesh conveyor belt of the conveying mechanism (201), and the lower reflector (203) is in a concave shape. The upper reflector (204) is fixed above the electric heating wire in the heating chamber mechanism (202). The bottom end of the exhaust pipe (3) passes through the bottom of the upper reflector (204). The upper reflector (204) is in an arch shape. The hot air flows flowing up and down in the heating chamber mechanism (202) contact the arc-shaped lower reflector (203) and upper reflector (204), and the movement trajectory of the hot air flow can be changed.

3. A tempering furnace for heat treatment of compression springs according to claim 1, characterized in that: The two infrared thermal imagers (7) are respectively fixed at the top of the adjacent air outlet hoods (501). Transparent observation windows (205) are arranged at both ends of the heating chamber mechanism (202). The detection ends of the infrared thermal imagers (7) are respectively directed towards the adjacent transparent observation windows (205). The infrared thermal imagers (7) can monitor the thermal energy field distribution in the heating chamber mechanism (202) through the transparent observation windows (205).

4. A heat treatment tempering furnace for a compression spring according to claim 1, characterized in that: The heat exchange mechanism (4) further includes a blower (403) fixed at the top of the smoke tube heat exchanger (401). A low-temperature pipe (404) is fixedly connected and communicated between the air outlet of the blower (403) and the low-temperature gas inlet (402). A high-temperature gas outlet (405) is also fixedly connected and communicated with one side wall of the smoke tube heat exchanger (401).

5. A tempering furnace for heat treatment of a compression spring according to claim 4, characterized in that: Both ends of the smoke tube heat exchanger (401) are fixedly connected and communicated with a high-temperature waste gas inlet (406) and a low-temperature waste gas outlet (407) respectively. One end of the waste gas pipe (3) is fixedly connected and communicated with the high-temperature waste gas inlet (406).

6. The tempering furnace for heat treatment of a compression spring according to claim 5, wherein: The air curtain mechanism (5) further includes a high-temperature resistant gas storage tank (504) fixed to the top of the bottom plate (1). A high-temperature pipe (505) is fixedly connected and communicated between the air inlet end of the high-temperature resistant gas storage tank (504) and the high-temperature gas outlet (405). A blower (506) is fixed to the top of the heating chamber mechanism (202). A heat preservation pipe (507) is fixedly connected and communicated between the air outlet end of the high-temperature resistant gas storage tank (504) and the air inlet end of the blower (506).

7. A tempering furnace for heat treatment of compression springs according to claim 6, characterized in that: A tee pipe (508) is arranged above each of the two air outlet hoods (501). Two ends of each of the two tee pipes (508) are fixedly connected and communicated with the top of the adjacent air outlet hood (501) respectively. The other ends of the two tee pipes (508) are fixedly connected and communicated with a first connecting pipe (509). A second connecting pipe (510) is fixedly connected and communicated between the air outlet end of the blower (506) and the first connecting pipe (509).

8. A tempering furnace for heat treatment of compression springs according to claim 7, characterized in that: Slot holes (511) are arrayed and opened at the top of the primary flow dividing plate (502). Round holes (512) are equidistantly opened at the top of the secondary flow dividing plate (503). The primary flow dividing plate (502) and the secondary flow dividing plate (503) have the same specifications. The slot holes (511) and the round holes (512) are staggered. A solenoid valve (513) is installed on the surface of the heat preservation pipe (507).

9. A tempering furnace for heat treatment of a compression spring according to claim 5, characterized in that: The waste gas treatment mechanism (6) further includes a draft fan (604) fixed to the top of the bottom plate (1). A first conveying pipe (605) is fixedly connected and communicated between the air inlet end of the electrostatic precipitator (601) and the low-temperature waste gas outlet (407).

10. A heat treatment tempering furnace for a compression spring according to claim 9, characterized in that: A second conveying pipe (606) is fixedly connected and communicated between the air outlet end of the electrostatic precipitator (601) and the air inlet end of the activated carbon adsorption tower (602). An air draft pipe (607) is fixedly connected and communicated between the air outlet end of the activated carbon adsorption tower (602) and the air inlet end of the draft fan (604). A discharge pipe (608) is fixedly connected and communicated between the air outlet end of the draft fan (604) and the air inlet end of the discharge tower (603).

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