Opening constant-temperature hot box

Abstract

The utility model relates to an open constant-temperature hot box which comprises a box body, an inlet and an outlet are formed in the two longitudinal ends of the box body respectively, and a wire passing channel is formed between the inlet and the outlet. A heat dissipation body below the wire passing channel is arranged in the box body; a gap is formed between one transverse side or two transverse sides of the heat dissipation body and the inner side wall of the box body, the heat dissipation body is heated to form hot air, the hot air ascends to heat fibers in the yarn passing channel, then the hot air forms low-heat air, and the low-heat air sinks to the position below the heat dissipation body from the gap between the heat dissipation body and the inner side wall of the box body. Then, the low-heat air rises to the heat dissipation body under the action of local negative pressure formed by rising of the hot air, so that heat of the heat dissipation body is absorbed, and hot air is formed; and an air channel with self-circulation hot air flow is formed in the box body. According to the technology, the air blowing phenomenon of the box body is relieved, and production energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of machinery, and in particular relates to an open constant-temperature hot box. BACKGROUND

[0002] There are a large number of processes requiring temperature maintenance in various industries of the national economy. The stability level of temperature maintenance often leads to a huge fluctuation in manufacturing level.

[0003] For example, in the process of hatching in the poultry breeding industry, the regulation of hatching temperature and humidity often determines the success or failure of the hatching rate.

[0004] In the food manufacturing industry, the temperature uniformity and time of continuous baking of biscuits, snacks, etc. determine the quality of the products.

[0005] In the continuous drying of agricultural products, maintaining a constant temperature is also a very important technology. If the temperature is too high, the products will be damaged, and if the temperature is too low, the moisture cannot be removed to the required standard.

[0006] In the textile printing and dyeing industry, continuous drying and setting of cloth also have strict requirements on temperature.

[0007] In the chemical fiber manufacturing industry, polyolefin and polyester fibers are often produced by hot stretching technology to achieve sufficient tensile strength. The temperature stability of hot stretching determines the stability of fiber fineness and whether the strength can meet the standard. The drawing hot box stretching method is commonly used in the production of high-strength and super-high-strength fibers. The device used is a drawing hot box, which heats the yarn and then cooperates with a drawing machine to realize the stretching of the fiber. The current drawing hot box uses a hot air circulation method to heat and maintain the temperature of the fiber yarn. The box body is provided with a yarn running chamber and an air duct for providing circulating hot air. A circulating fan and an electric heating box are arranged in the air duct. However, due to the internal structure, there is generally a blowout phenomenon at both ends, causing an increase in production energy consumption and a poor operating environment. At the same time, the noise generated during the operation of the fan is also large, and the maintenance of the fan is large. The heated hot air is not mixed uniformly, which causes the temperature distribution of the hot air entering the yarn running chamber to be uneven and a temperature gradient to be generated. The existence of the temperature gradient leads to uneven fiber fineness and a decrease in overall strength. Under the premise of large-scale equipment, the contradiction is more prominent.

[0008] CN101144199B discloses a high-modulus high-strength polyethylene fiber double-air-duct drawing hot box. The patent uses two layers of air ducts with independent heating systems, adds a wind direction adjusting plate and a flow guide plate, and adds a wind guide plate in the heater. Although the wind direction of the yarn inlet and outlet is adjusted to a certain extent, the problem of large blowout volume and high energy consumption at both ends of the hot box cannot be solved, nor can the problem of uneven heating of the electric resistance heater itself be solved. Moreover, the equipment structure is complex and the investment is large.

[0009] CN206970749U arranges multiple fans in the working width, each fan has a separate air duct, and a temperature controller is arranged in the air duct. This patent longitudinally arranges multiple channels, each channel independently supplies air and adjusts the air volume of multiple channels. Like the above patent, the equipment structure is complex, the investment is large, and the problem of high air volume and high energy consumption at both ends of the heat box cannot be solved.

[0010] In the above-mentioned industries and unmentioned industries, the constant temperature heating device for continuous production has the problem of high air volume and high energy consumption at both ends of the heat box. SUMMARY

[0011] The present application aims to solve the problems of complex equipment structure, high energy consumption, uneven temperature field, and high air speed, and provides an open constant temperature heat box, which is specifically implemented by the following technical solutions:

[0012] An open constant temperature heat box, comprising a box body with an inlet and an outlet arranged at the longitudinal two ends respectively, a wire passing channel is formed between the inlet and the outlet; a heat sink is arranged below the wire passing channel in the box body; a gap is formed between the heat sink and the inner side wall of the box body on one side or both sides of the heat sink in the transverse direction, the heat sink is heated to form hot air, the hot air rises to heat the fiber in the wire passing channel, and then the hot air forms low-temperature air, the low-temperature air sinks below the heat sink from the gap between the heat sink and the inner side wall of the box body, and then the low-temperature air rises to the heat sink under the action of the local negative pressure formed by the upward rising of the hot air, thereby absorbing the heat of the heat sink to form hot air; that is, an air duct with self-circulating hot air flow is formed in the box body.

[0013] The open constant temperature heat box is further designed in that a partition plate is vertically arranged on the transverse side of the heat sink, the gap is formed between the partition plate and the inner wall of the box body on the corresponding side, and the air flows along the transverse periphery of the partition plate, that is, the periphery of the partition plate forms the air duct.

[0014] The open constant temperature heat box is further designed in that the heat sink is a plurality of heat pipes arranged in a spaced manner in the transverse direction or the longitudinal direction; the gap between the heat pipes and the adjacent heat pipes forms a channel for the low-temperature air to rise and be heated to form hot air.

[0015] The open constant temperature heat box is further designed in that the heat pipe is heated by an electric heating wire.

[0016] The open constant temperature heat box is further designed in that the heat pipe is heated by steam.

[0017] The open constant-temperature hot box is further designed in that the heat pipes are arranged transversely in the box, the lower part of the box is provided with a steam generator, the steam outlet of the steam generator is connected with the transverse one end of the heat pipe through a distribution pipeline, and the other side one end of the heat pipe sends steam condensate water back to the steam generator through a pipeline.

[0018] The open constant-temperature hot box is further designed in that the heat pipe is a finned pipe with a large heat dissipation area.

[0019] The open constant-temperature hot box is further designed in that the heat pipes are arranged transversely, and a plurality of heat pipes form a heat pipe group, and each heat pipe group is distributed longitudinally in the box.

[0020] The open constant-temperature hot box is further designed in that the internal space height of the box is not less than 500 mm, and the minimum flow area of the air duct is not less than 0.01 m².

[0021] The method has the following advantages compared with the prior art: specifically, a heat pipe type constant-temperature self-circulation energy-saving hot box utilizes the heat pipe constant-temperature principle, utilizes the density difference of cold and hot air to form hot air self-convection circulation in the box, cancels the circulating fan, and has a simple structure; the box blowing phenomenon is reduced, and the production energy consumption is reduced; the slow air convection improves the uniformity of the temperature field, and slows down the air speed; when the heat pipe is heated by steam, the temperature control is more accurate, different temperatures can be obtained by only controlling the steam pressure, the steam and water exist in the heat pipe at the same time, and the heat pipe has a certain buffering capacity under small working condition fluctuations; the hot convection self-circulation mode has a more moderate air volume, can reduce the generation of random silk when applied to the chemical fiber manufacturing industry, and improves the product quality. Meanwhile, the circulating fan is cancelled, noise is eliminated, temperature deviation caused by uneven air distribution is eliminated, the box blowing phenomenon at both ends is eliminated, the operating environment is improved; the heat pipes in the hot box can be arranged in groups, different temperatures can be obtained by controlling different pressures, the effect of multi-section temperature control in one device can be realized, the process is simplified, and the energy consumption is greatly reduced; by replacing the medium in the heat pipe, a wider working temperature can be obtained, and the hot box can be applied to drying and drying in other industries, such as the textile industry, food processing, furniture manufacturing, and agricultural and sideline product processing. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall internal structure of an embodiment of the present application.

[0023] Figure 2 is a schematic diagram of the transverse cross-sectional structure of an embodiment of the present application. DETAILED DESCRIPTION

[0024] The present application is further described below in conjunction with the accompanying drawings and embodiments:

[0025] The open constant temperature hot box shown in the figure comprises a box body 1 with an inlet 11 and an outlet 12 arranged at the longitudinal two ends respectively, and a wire passing channel 2 is formed between the inlet 11 and the outlet 12; a heat sink 3 is arranged below the wire passing channel in the box body; a gap is formed between the heat sink 3 and the inner side wall of the box body at one side or both sides of the heat sink 3 in the transverse direction, the heat sink is heated to form hot air, the hot air rises to heat the fiber in the wire passing channel, and then the hot air forms low-temperature air, the low-temperature air sinks to the lower side of the heat sink from the gap between the heat sink and the inner side wall of the box body, and then the low-temperature air rises to the heat sink under the action of the local negative pressure formed by the upward rising of the hot air, thereby absorbing the heat of the heat sink to form hot air; that is, an air duct with self-circulating hot air flow is formed in the box body. In this embodiment, gaps for forming the air duct are arranged on both sides of the heat sink, thereby forming a symmetrical convection effect; of course, only one side of the self-circulating hot air flow can be arranged.

[0026] A partition plate 31 is arranged vertically on the lateral side of the heat sink 3, and the gap between the partition plate and the inner wall of the box body on the corresponding side forms the gap, and the air flows along the lateral side of the partition plate, that is, the lateral side of the partition plate forms the air duct. The partition plate 31 can prevent the air from flowing disorderly and turbulently in the box body.

[0027] The heat sink 3 is a plurality of heat pipes 32 arranged in the transverse direction or the longitudinal direction; the gap between the heat pipes and the adjacent heat pipes forms a channel for the low-temperature air to rise and be heated to form hot air.

[0028] The heat pipes can be heated by electric heating wires; when the electric heating wires are used for heating, different temperatures can be formed by arranging electric heating wires with different powers.

[0029] The heat pipes in the illustrated embodiment are heated by steam. At this time, because steam and water exist in the heat pipes at the same time, the heat pipes have a certain buffering capacity under small working condition fluctuations; specifically, the plurality of heat pipes are arranged in the transverse direction in the box body, a steam generator 4 is arranged at the lower part of the box body, the steam outlet of the steam generator is connected to one end of the heat pipes in the transverse direction through a distribution pipeline, and the other end of the heat pipes is connected to the steam generator through a pipeline to send steam condensate water back to the steam generator.

[0030] In order to increase the heat exchange area between the heat pipes and the air, the heat pipes are finned pipes with large heat dissipation areas.

[0031] The heat pipes are arranged in the transverse direction, a plurality of heat pipes form a heat pipe group, and the heat pipe groups are distributed in the longitudinal direction in the box body; as shown in the figure, two steam generators 4 are used to heat two heat pipe groups respectively, and different heating temperatures can be formed in the fiber travel. Figure 1

[0032] ​The height of the inner space of the box is not less than 500mm, and the minimum flow area of the air duct is not less than 0.01m2. On the one hand, a larger space is arranged, and on the other hand, the flow area of the air duct is larger, so that the air flow is ensured to be slow, and the air as a heat medium is fully heated and cooled.

[0033] The present application utilizes the constant temperature principle of the heat pipe, realizes the temperature balance in the box, and controls the temperature error of the filament running chamber within ±1℃. The circulation fan is cancelled by utilizing the heat convection, realizes the self-circulation, the power consumption is one third of the original equipment, and the processing cost of the equipment is one fifth of the original equipment.

Claims

1. An open constant temperature oven, characterized by, The application relates to a heat dissipation device for a wire drawing machine, which comprises a box body provided with an inlet and an outlet at the longitudinal two ends respectively, a wire drawing channel is formed between the inlet and the outlet, a heat dissipation body is arranged inside the box body below the wire drawing channel, a gap is formed between the heat dissipation body and the inner side wall of the box body at one or both sides of the heat dissipation body in the transverse direction, the heat dissipation body is heated to form hot air, the hot air rises to heat the fiber in the wire drawing channel, then the hot air forms low-temperature air, the low-temperature air sinks to the lower part of the heat dissipation body from the gap between the heat dissipation body and the inner side wall of the box body, then the low-temperature air rises to the heat dissipation body under the action of the local negative pressure formed by the upward rising of the hot air, so that the heat of the heat dissipation body is absorbed to form hot air; that is, an air duct with self-circulating hot air flow is formed in the box body.

2. The open constant temperature oven of claim 1, wherein, A partition plate is arranged vertically on the lateral side of the heat dissipation body, the gap is formed between the partition plate and the inner wall of the box body on the corresponding side, air flows along the lateral side of the partition plate, that is, the lateral side of the partition plate forms the air duct.

3. The open constant temperature oven of claim 1, wherein, The heat dissipation body is a plurality of heat pipes arranged in the transverse direction or the longitudinal direction at intervals; the gap between the heat pipes and the adjacent heat pipes forms a channel for the low-temperature air to rise and be heated to form hot air.

4. The open constant temperature oven of claim 3, wherein, The heat pipes are heated by electric heating wires.

5. The open constant temperature oven of claim 3, wherein, The heat pipes are heated by steam.

6. The open constant temperature oven of claim 5, wherein, The plurality of heat pipes are arranged in the transverse direction in the box body, a steam generator is arranged at the lower part of the box body, the steam outlet of the steam generator is connected with one end of the heat pipes through a distribution pipeline, and the other end of the heat pipes is connected with the steam generator through a pipeline to send the steam condensate water back to the steam generator.

7. The open constant temperature oven of claim 3, wherein, The heat pipes are finned pipes with large heat dissipation areas.

8. The open constant temperature oven of claim 3, wherein, The heat pipes are arranged in the transverse direction, and a plurality of heat pipes form a heat pipe group, and the heat pipe groups are distributed in the longitudinal direction in the box body.

9. The open constant temperature oven of claim 1, wherein, The height of the inner space of the box is not less than 500mm, and the minimum flow area of the air duct is not less than 0.01m 2 .

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