Low-temperature efficient heat exchange drying furnace

Abstract

The invention relates to the technical field of machining of fin heat exchangers, in particular to a low-temperature efficient heat exchange drying furnace. The device comprises a furnace body, a conveying plate is arranged in the furnace body, the furnace body and the conveying plate are provided with a blowing mechanism and a flow dividing mechanism respectively, and the blowing mechanism, the flow dividing mechanism and workpieces are in one-to-one butt joint; a hydraulic rod is started to drive an air conveying pipe to be in butt joint with an air inlet pipe, and then purified air is blown into a heat exchanger through the air conveying pipe and a flow dividing jig; due to the fact that the interior of the heat exchanger is of a U-shaped structure, the air blowing branch holes are in butt joint with part of the air inlet end of the heat exchanger, air enters from one end of the heat exchanger and exits from the other end of the heat exchanger, the directional air inlet mode ensures that air flows orderly in a heat exchanger pipe, oil gas in the heat exchanger is brought out, and the drying effect in the heat exchanger is improved. And meanwhile, the air blowing branch holes are in butt joint with the air inlet end of the heat exchanger part, so that the air blowing branch holes blow air into each U-shaped pipe, and uniform drying is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing of fin heat exchangers, in particular to a low-temperature and high-efficiency heat exchange drying furnace. Background Art

[0002] A heat exchanger (also called a heat exchanger or heat exchange equipment) is a device used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements. It is an industrial application of convective heat transfer and heat conduction. During the manufacturing process of heat exchangers, volatile processing lubricants are used to stamp fins and process copper tubes. After the heat exchanger tube expansion is completed, the attached processing lubricants need to be removed. The equipment used to remove the lubricants is a drying furnace.

[0003] When drying an existing heat exchanger, a drying furnace is usually used to heat the workpiece with circulating hot air from an electric heater. After the workpiece is heated to a certain temperature, a blower is used to aim at the U-shaped tube mouth of the heat exchanger to blow clean air into the U-shaped tube to take away the oil and gas in the tube. The circulating hot air in the furnace will blow away the oil and gas on the surface of the heat exchanger and be discharged to the outside of the furnace by the exhaust fan. However, the U-shaped tube of the heat exchanger is a slender structure, and the effect of using a blower to purge the oil and gas inside the tube is poor, so the heating temperature of the drying furnace cannot be too low, which increases the energy consumption of the device. Moreover, if the oil and gas in the tube are not purged completely, it will have a great impact on the subsequent vacuum drying process, and it is easy to contaminate the vacuum system and cause poor vacuum. In view of this, we propose a low-temperature and high-efficiency heat exchange drying furnace. Summary of the invention

[0004] The object of the present invention is to provide a low-temperature and high-efficiency heat exchange drying furnace to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides a low-temperature and high-efficiency heat exchange drying furnace, comprising a furnace body, a conveying plate is arranged inside the furnace body, a purge mechanism and a diversion mechanism are respectively arranged on the furnace body and the conveying plate, and the purge mechanism, the diversion mechanism and the workpiece are connected one by one; The compressed gas is blown into the diversion mechanism through the purge mechanism, and the outlet end of the diversion mechanism corresponds to the inlet end of the workpiece, so that the compressed air enters the workpiece along a specific path, that is, the workpiece takes in air at one end and exhausts air at the other end, so that the air forms an orderly flow in the workpiece and brings out the moisture or oil gas inside the workpiece.

[0006] As a further improvement of the technical solution, the purge mechanism at least includes a support plate fixedly connected to the outer wall of the furnace body, a mounting plate is slidably connected to the support plate, and a gas pipe is fixedly connected to the mounting plate.

[0007] As a further improvement of the present technical solution, the diversion mechanism comprises at least a diversion fixture fixedly connected to the conveying plate, and a plurality of blowing branch holes are fixedly connected to the side of the diversion fixture away from the air pipe, and exhaust grooves are formed between each pair of the blowing branch holes.

[0008] As a further improvement of the technical solution, two air inlet pipes are fixedly connected to the side of the diversion fixture away from the blowing branch hole, and the air inlet pipes are snap-fitted and adapted to the air outlet end of the air delivery pipe.

[0009] As a further improvement of the technical solution, grooves are provided inside the two air inlet pipes, and the circular diameter of the grooves is snap-fitted with the circular diameter of the air delivery pipes, and sealing rings are fixedly connected in the grooves.

[0010] As a further improvement of the technical solution, a partition is fixedly connected inside the diversion fixture, and a plurality of through holes are opened on the partition, and the through holes correspond to the blowing holes one by one.

[0011] As a further improvement of the technical solution, a hydraulic rod is fixedly mounted on the support plate, and an output end of the hydraulic rod is fixedly connected to one side of the mounting plate.

[0012] As a further improvement of the technical solution, a plurality of fixed plates are fixedly connected to the transmission plate, and a connecting plate is rotatably connected to one side of the plurality of fixed plates.

[0013] As a further improvement of the technical solution, heat exchangers are clamped inside the adjacent connecting plates, and part of the air inlet ends of the heat exchangers correspond to the air blowing holes.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In this low-temperature and high-efficiency heat exchange drying furnace, the hydraulic rod is started to drive the air supply pipe and the air inlet pipe to connect, and then the purified air is blown into the heat exchanger through the air supply pipe and the diversion fixture; Since the heat exchanger has a U-shaped structure inside, the air blowing hole is connected to the air inlet end of the heat exchanger, so that the heat exchanger has air inlet at one end and air outlet at the other end. This directional air intake method ensures that the air forms an orderly flow in the heat exchanger tube, thereby effectively taking out the oil and gas inside the heat exchanger, thereby improving the drying effect inside the heat exchanger; At the same time, the air blowing branch hole is connected to the air inlet end of the heat exchanger, so that the air blowing branch hole blows air into each U-shaped tube, which can ensure that the oil and gas in the tube are removed, create good conditions for vacuum drying, achieve uniform drying, and ensure that the drying effect of each U-shaped tube is consistent, thereby improving the quality stability of the product.

[0015] 2. In the low-temperature and high-efficiency heat exchange drying furnace, air is blown into the heat exchanger through the air blowing holes, which improves the drying effect in the heat exchanger tube. This enables better drying quality to be achieved at a lower furnace temperature, without the need to increase the furnace temperature too much to ensure the drying effect, thereby achieving energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal parts structure of the furnace body of the present invention; Figure 3 It is a schematic diagram of the structure of the purge mechanism and the diversion mechanism of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the diversion mechanism of the present invention; Figure 5 It is a schematic diagram of the enlarged structure of point A of the present invention; Figure 6 It is a schematic diagram of the diversion mechanism structure of the present invention; Figure 7 It is an exploded view of the diversion mechanism of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the fixing plate of the present invention.

[0017] The meaning of each number in the figure is: 100, furnace body; 110, conveying plate; 120, heat exchanger; 130, fixing plate; 131, connecting plate; 200, purge mechanism; 210, support plate; 211, mounting plate; 212, gas pipe; 220, hydraulic rod; 300, diversion mechanism; 310, diversion fixture; 311, air blowing hole; 312, air inlet pipe; 313, partition; 314, sealing ring. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] During the manufacturing process of heat exchangers in the refrigeration industry, volatile processing lubricants are used to stamp fins and process copper tubes. However, after the expansion of the heat exchanger tubes, the attached processing lubricants need to be removed. The equipment used to remove the lubricants is a drying furnace. The drying furnace generally uses an electric heater to circulate hot air for heating. After the workpiece is heated to a certain temperature, a blower is used to aim at the U-shaped tube mouth to blow clean air into the U-shaped tube to take away the oil and gas in the tube. The circulating hot air in the furnace will blow away the oil and gas on the surface of the heat exchanger and be discharged out of the furnace together by the exhaust fan; Because the heat exchanger U-tube is a slender structure, the effect of using a blower to purge the oil and gas inside the tube is poor, so the heating temperature of the drying furnace cannot be too low. In terms of quality, the incomplete purge of the oil and gas in the tube has a great impact on the vacuum drying process in the subsequent process, and it is easy to pollute the vacuum system and cause poor vacuum. Therefore, please refer to Figure 1-Figure 8 As shown, this embodiment provides a low-temperature and high-efficiency heat exchange drying furnace, including a furnace body 100, a conveying plate 110 is arranged inside the furnace body 100, a purge mechanism 200 and a diverter mechanism 300 are respectively arranged on the furnace body 100 and the conveying plate 110, the purge mechanism 200, the diverter mechanism 300 and the workpiece are connected one by one, the purge mechanism 200 blows the purified air into the diverter mechanism 300, and then the diverter mechanism 300 blows the purified air into the workpiece; The compressed gas is blown into the diverter mechanism 300 through the purge mechanism 200. The outlet end of the diverter mechanism 300 corresponds to the inlet end of the workpiece, so that the compressed air enters the workpiece along a specific path, that is, the workpiece takes in air at one end and exhausts air at the other end. This allows the air to form an orderly flow in the workpiece, and brings out the moisture or oil and gas inside the workpiece. This not only brings out the moisture or oil and gas inside the workpiece, thereby improving the drying effect inside the workpiece and ensuring that the drying effect of each U-shaped tube is consistent, but also the heating temperature of the furnace body 100 can be reduced, thereby achieving an energy-saving effect.

[0020] The present invention takes into account that when drying an existing heat exchanger, a blower is usually used to aim at the U-shaped tube mouth of the heat exchanger to blow clean air into the U-shaped tube to take away the oil and gas in the tube. However, the U-shaped tube of the heat exchanger is a slender structure, and the effect of using a blower to purge the oil and gas inside the tube is poor; therefore, a purge mechanism 200 and a diverter mechanism 300 are provided, and the purified air is blown into the diverter mechanism 300 through the purge mechanism 200, so that the air inside the diverter mechanism 300 can be blown into the workpiece. The interior of the workpiece is U-shaped. Since the diverter mechanism 300 is connected to the air inlet end of the workpiece, the workpiece is air-intaked at one end and air-out at the other end. This directional air intake method ensures that the air forms an orderly flow in the workpiece tube, thereby effectively taking out the moisture or oil and gas inside the workpiece, greatly improving the drying effect inside the workpiece; Considering that the blower has a poor effect in sweeping the oil and gas inside the pipe, the heating temperature of the drying furnace cannot be too low, which increases the energy consumption of the device; therefore, when drying the inside of the workpiece, the circulating hot air in the furnace body 100 continues to play a role, blowing away the oil and gas on the surface of the workpiece, and blowing the air into the workpiece through the diversion mechanism 300, so that the drying effect inside the workpiece is improved. Since the drying inside the workpiece pipe is strengthened, better drying quality can be achieved at a lower temperature of the furnace body 100, and there is no need to increase the temperature of the furnace body 100 too much to ensure the drying effect, thereby achieving energy saving; In addition, if the oil and gas in the tube are not completely purged, it will have a great impact on the subsequent vacuum drying process, and it is easy to contaminate the vacuum system and cause a poor vacuum condition; therefore, when the diverter mechanism 300 corresponds to the air inlet end of the workpiece part respectively, the diverter mechanism 300 blows the purging air into each U-shaped tube, which can ensure that the oil and gas in the tube are removed, create good conditions for vacuum drying, achieve uniform drying, and ensure that the drying effect of each U-shaped tube is consistent, thereby improving the quality stability of the product.

[0021] The purified gas is transmitted, such as Figure 2-Figure 3 As shown, the specific structure of the purge mechanism 200 is further disclosed. The purge mechanism 200 at least includes a support plate 210 fixedly connected to the outer wall of the furnace body 100, and a mounting plate 211 is slidably connected to the support plate 210. A gas pipe 212 is fixedly connected to the mounting plate 211, and the purified air is input into the gas pipe 212. Subsequently, the gas is blown into the channel through the gas pipe 212 to ensure stable gas delivery.

[0022] The gas in the diversion fixture 310 is blown into the workpiece, such as Figure 6-Figure 7 As shown, the specific structure of the diverter mechanism 300 is further disclosed. The diverter mechanism 300 at least includes a diverter fixture 310 fixedly connected to the conveying plate 110. A plurality of blowing branch holes 311 are fixedly connected to the side of the diverter fixture 310 away from the gas pipe 212. Exhaust grooves are formed between the two blowing branch holes 311. During the drying process of the workpiece, when the oil and gas in the pipe are discharged, the exhaust grooves can guide the gas to flow along a specific path to avoid disorderly diffusion of the gas in the surrounding environment. The air inlet end of the workpiece is connected to the blowing branch hole 311, and the gas inside the diverter fixture 310 is input into the workpiece through the blowing branch hole 311.

[0023] The gas in the gas delivery pipe 212 needs to be input into the flow dividing fixture 310, such as Figure 4-Figure 5As shown, two air inlet pipes 312 are fixedly connected to the side of the diverter fixture 310 away from the blowing branch hole 311, and the air inlet pipes 312 are snap-fitted with the air outlet end of the air supply pipe 212. The air inlet pipes 312 are connected to the air outlet end of the air supply pipe 212, and the gas inside the air supply pipe 212 is input into the diverter fixture 310 through the air inlet pipes 312.

[0024] When the gas inside the gas delivery pipe 212 is input into the flow dividing fixture 310 through the gas inlet pipe 312, in order to reduce the possibility of gas leakage, such as Figure 5 As shown, grooves are provided inside the two air inlet pipes 312, and the circular diameter of the grooves is snap-fitted with the circular diameter of the air supply pipe 212, and sealing rings 314 are fixedly connected in the grooves. When the air supply pipe 212 is inserted into the air inlet pipe 312, the air supply pipe 212 abuts against the sealing ring 314, so that the sealing ring 314 can fit tightly with the outer wall of the air supply pipe 212, thereby forming an effective seal and reducing the possibility of gas leakage.

[0025] In order to make the gas inside the diversion fixture 310 flow evenly to each blowing branch hole 311, Figure 5 As shown, a partition 313 is fixedly connected to the inside of the diverter fixture 310, and a plurality of through holes are opened on the partition 313, and the through holes correspond to the blowing holes 311 one by one. After the gas enters the diverter fixture 310 through the air inlet pipe 312, the partition 313 can play a role in evenly distributing the airflow, and the gas inside the diverter fixture 310 can flow evenly to each blowing hole 311 through the through holes on the partition 313.

[0026] In order to drive the air delivery pipe 212 and the air intake pipe 312 to be connected, as shown in FIG. Figure 7 As shown, a hydraulic rod 220 is fixedly mounted on the support plate 210, and the output end of the hydraulic rod 220 is fixedly connected to one side of the mounting plate 211. The hydraulic rod 220 is started to drive the support plate 210 to move, thereby driving the air pipe 212 to move, and connecting the air pipe 212 with the air inlet pipe 312.

[0027] When drying the heat exchanger 120, it is necessary to ensure the stability of the heat exchanger 120. Figure 8 As shown, a plurality of fixing plates 130 are fixedly connected to the conveying plate 110, and one side of each of the fixing plates 130 is rotatably connected to a connecting plate 131, and the other sides of the fixing plates 130 and the connecting plates 131 are fixedly connected by bolts. When the heat exchanger 120 needs to be fixed between the fixing plate 130 and the connecting plate 131, the bolts are removed, and then the connecting plate 131 is rotated so that the connecting plate 131 does not block the top of the fixing plate 130, and then the heat exchanger 120 is placed on the fixing plate 130, and then the connecting plate 131 is rotated so that the connecting plate 131 is reset, and finally the fixing plate 130 and the connecting plate 131 are connected by bolts.

[0028] The gas inside the diversion fixture 310 is blown into the heat exchanger 120, such as Figure 4 As shown, the heat exchangers 120 are clamped inside each of the adjacent connecting plates 131, and part of the air inlet end of the heat exchanger 120 corresponds to the air blowing branch hole 311, and the air blowing branch hole 311 is connected to part of the air inlet end of the heat exchanger 120, so that the heat exchanger 120 takes in air at one end and exhausts air at the other end. This directional air intake method ensures that the air forms an orderly flow in the heat exchanger 120 tube, thereby effectively bringing out the moisture and oil gas inside the heat exchanger 120, thereby improving the drying efficiency inside the heat exchanger 120.

[0029] Working principle: firstly, the heat exchanger 120 is preheated by hot air. When it is detected that the heat exchanger 120 is transmitted to the position of the air pipe 212, the heat exchanger 120 stops transmitting, and then the hydraulic rod 220 is started to drive the support plate 210 to move, thereby driving the air pipe 212 to move, and connecting the air pipe 212 with the air inlet pipe 312, and then the purified air is blown into the diversion fixture 310 through the air pipe 212, so that the gas inside the diversion fixture 310 is blown into the heat exchanger 120 through the blowing branch hole 311, and the inside of the heat exchanger 120 is U-shaped. Since the blowing branch hole 311 is connected to the partial air inlet end of the heat exchanger 120, the heat exchanger 120 is air-intaked at one end and air-out at the other end. This directional air intake method ensures that the air forms an orderly flow in the heat exchanger 120 tube, thereby effectively taking out the moisture and oil gas inside the heat exchanger 120, greatly improving the drying efficiency in the heat exchanger 120; The gas is blown into the heat exchanger 120 through the diversion fixture 310, so that the drying effect in the heat exchanger 120 is greatly improved. At the same time, the circulating hot air in the furnace body 100 continues to play a role, blowing away the oil and gas on the surface of the heat exchanger 120. Since the drying in the heat exchanger 120 tube is strengthened, the drying process of the entire heat exchanger 120 is more efficient, so that better drying quality can be achieved at a lower temperature of the furnace body 100. In this way, the heat distribution in the drying process of the heat exchanger 120 is more reasonable, and there is no need to increase the temperature of the furnace body 100 too much to ensure the drying effect, thereby achieving energy saving; In addition, two groups of the purge mechanism 200 and the diversion mechanism 300 are provided, and one side of the heat exchanger 120 can be purged when it is transferred to the middle section and the end of the furnace body 100, thereby greatly reducing the residual oil amount inside the heat exchanger 120.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-temperature and high-efficiency heat exchange drying furnace, comprising a furnace body (100), wherein a conveying plate (110) is provided inside the furnace body (100), characterized in that: The furnace body (100) and the conveying plate (110) are respectively provided with a purge mechanism (200) and a diversion mechanism (300), and the purge mechanism (200), the diversion mechanism (300) and the workpiece are connected one by one; Compressed gas is blown into the diversion mechanism (300) through the purge mechanism (200), and the gas outlet end of the diversion mechanism (300) partially corresponds to the gas inlet end of the workpiece, so that the compressed air enters the workpiece along a specific path, that is, the workpiece enters the gas at one end and exits the gas at the other end, so that the air forms an orderly flow in the workpiece, and the moisture or oil gas inside the workpiece is taken out.

2. The low-temperature and high-efficiency heat exchange drying furnace according to claim 1 is characterized in that: The purge mechanism (200) comprises at least a support plate (210) fixedly connected to the outer wall of the furnace body (100), a mounting plate (211) being slidably connected to the support plate (210), and a gas delivery pipe (212) being fixedly connected to the mounting plate (211).

3. The low-temperature and high-efficiency heat exchange drying furnace according to claim 2 is characterized in that: The flow diversion mechanism (300) comprises at least a flow diversion fixture (310) fixedly connected to the transmission plate (110), wherein a plurality of air blowing branch holes (311) are fixedly connected to a side of the flow diversion fixture (310) away from the air delivery pipe (212), and an exhaust groove is formed between each of the air blowing branch holes (311).

4. The low-temperature and high-efficiency heat exchange drying furnace according to claim 3 is characterized in that: Two air inlet pipes (312) are fixedly connected to a side of the flow dividing fixture (310) away from the air blowing branch hole (311), and the air inlet pipes (312) are snap-fitted to the air outlet end of the air delivery pipe (212).

5. The low-temperature and high-efficiency heat exchange drying furnace according to claim 4 is characterized in that: The two air inlet pipes (312) are each provided with a groove, and the diameter of the groove is adapted to the diameter of the air delivery pipe (212) by snap-fitting, and a sealing ring (314) is fixedly connected in each of the grooves.

6. The low-temperature and high-efficiency heat exchange drying furnace according to claim 3 is characterized in that: A partition plate (313) is fixedly connected inside the flow dividing fixture (310), and a plurality of through holes are formed on the partition plate (313), and the through holes correspond to the air blowing holes (311) one by one.

7. The low-temperature and high-efficiency heat exchange drying furnace according to claim 2 is characterized in that: A hydraulic rod (220) is fixedly mounted on the support plate (210), and an output end of the hydraulic rod (220) is fixedly connected to one side of the mounting plate (211).

8. The low-temperature and high-efficiency heat exchange drying furnace according to claim 1 is characterized in that: A plurality of fixed plates (130) are fixedly connected to the transmission plate (110), and a connecting plate (131) is rotatably connected to one side of the plurality of fixed plates (130).

9. The low-temperature and high-efficiency heat exchange drying furnace according to claim 8, characterized in that: The heat exchangers (120) are clamped inside the connecting plates (131) adjacent to each other, and part of the air inlet ends of the heat exchangers (120) correspond to the air blowing branch holes (311).

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