Polyester pre-oriented yarn (POY) drying box with intra-cavity heat circulation assembly

Abstract

The utility model discloses a polyester pre-oriented yarn (POY) drying box with an intra-cavity heat circulation assembly, and relates to the technical field of polyester production, the polyester pre-oriented yarn drying box comprises a drying box main body, an adjusting mechanism is arranged on the outer side of the drying box main body, and the adjusting mechanism comprises a telescopic assembly which comprises two gears rotationally installed in the drying box main body, according to the device, during excessive drying, a servo motor is used for driving the gears to rotate, the two toothed plates synchronously and relatively move, the distance between the limiting shafts is shortened, and therefore the drying efficiency is improved. The conveying length and the drying time of the polyester pre-oriented yarn in the drying box are reduced; when drying is insufficient, the distance is increased through reverse adjustment, the requirement for drying the polyester pre-oriented yarn is flexibly met, the problem of excessive drying or insufficient drying is effectively solved, and the drying quality of the polyester pre-oriented yarn is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of polyester production technology, specifically to a polyester POY pre-oriented yarn drying oven with an internal heat circulation component. Background Technology

[0002] POY, or pre-oriented yarn, is an intermediate product in the spinning process of polyester (polyethylene terephthalate, PET). Its macromolecular chains have a certain degree of orientation along the fiber axis, but low crystallinity. It has a certain tensile potential and a semi-transparent appearance. After stretch deformation (DTY), it is made into elastic yarn for sportswear, underwear, etc.; after full stretching (FDY), it is made into high-strength yarn for shirts, curtains, etc. During the production of POY, the moisture content is relatively high, so it needs to be dried in a drying oven to avoid fuzzy fibers and broken ends caused by moisture evaporation during subsequent spinning processes.

[0003] Reference patent document: Patent Publication No. CN221608262U, Patent Publication Date 2024-08-27, discloses a polyester colored POY drying device, relating to the field of polyester production technology. It includes a base, with a drying mesh cylinder rotatably mounted on the inner wall of the base. A fixing ring is connected to the top of the outer wall of the drying mesh cylinder via a fixing rod. A pressure ring is driven to the top of the drying mesh cylinder via an adjustment mechanism. The driving mechanism includes a U-shaped fixing frame, a screw, and a lifting block. The top of the drying mesh cylinder has a fixing frame, with a screw threadedly connected to the fixing frame. The bottom end of the screw is connected to a lifting block. Vertically arranged grooves are opened on both sides of the fixing frame. The lifting block is connected to the pressure ring via a connecting rod passing through the grooves. A heating mechanism is provided inside the base. A cover cylinder that detachably covers the drying mesh cylinder is connected to the base. This polyester colored POY drying device can dry the polyester POY during the rotation of the drying mesh cylinder, resulting in uniform drying of the polyester POY.

[0004] Based on the search of patent numbers and the shortcomings of existing technologies, the following was found:

[0005] Traditional continuous conveyor drying ovens typically use a fan to blow air in, which is then heated by a heating element before entering the oven to dry the continuously passing POY pre-oriented yarns. However, in this process, the hot air is directly discharged from the exhaust channel due to air convection, which prevents the full utilization of the hot air and results in a significant waste of heat energy. Furthermore, the time that the POY pre-oriented yarns spend in the drying oven cannot be adjusted, making them prone to over-drying or incomplete drying. If the production speed of the production line is adjusted to control the time spent in the drying oven, it will affect the production efficiency of the POY pre-oriented yarns.

[0006] Therefore, this utility model provides a drying oven for pre-oriented polyester POY yarn with an internal heat circulation component. Utility Model Content

[0007] To address the problems of insufficient utilization of hot air and inconvenience in flexibly adjusting it according to the drying degree of polyester pre-oriented yarn, the purpose of this utility model is to provide a polyester POY pre-oriented yarn drying oven with an internal heat circulation component.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a drying oven for pre-oriented polyester POY yarn with an internal heat circulation assembly, comprising a drying oven body, wherein an adjustment mechanism is provided on the outer side of the drying oven body, the adjustment mechanism comprising:

[0009] The telescopic assembly includes two gears rotatably mounted inside the drying chamber body. Each gear has a drive assembly on one side, and two diagonally distributed toothed plates on both sides of the gears. The toothed plates mesh with the gears. Inside the drying chamber body, there are two diagonally distributed limiting shafts. The two ends of the two limiting shafts are fixedly mounted on opposite sides of one end of the toothed plates. Two diagonally distributed traction shafts are fixedly mounted in the middle of the drying chamber body. The outer surfaces of the traction shafts and limiting shafts are provided with multiple polyester pre-oriented yarns. The polyester pre-oriented yarns can be guided by their own outer surfaces to transport the polyester pre-oriented yarns along a predetermined route.

[0010] The heat recovery unit, located on the outside of the drying chamber, is used to recycle hot air.

[0011] Preferably, the heat recovery assembly includes a protective cover, two symmetrically distributed air outlets fixedly installed at the lower part of the protective cover, two symmetrically distributed drying plates fixedly installed at the lower part of the protective cover, a fan fixedly installed at the bottom center of the drying chamber body, and a heating element that works in conjunction with the fan fixedly installed at the lower part of the drying chamber body.

[0012] Preferably, the drive assembly includes mounting brackets fixedly installed on both sides of the protective cover, with servo motors fixedly installed at the top of each mounting bracket, and the middle of one side of each of the two gears fixedly installed at the drive end of the servo motor.

[0013] Preferably, a slider is fixedly installed on one side of each of the plurality of toothed plates, and a plurality of grooves are provided on the inner wall of the drying oven body to cooperate with the slider.

[0014] Preferably, an exhaust port is provided at the top center of the main body of the drying oven, and the exhaust port communicates with the inner cavity of the protective cover.

[0015] Preferably, a filter cover is fixedly installed at the bottom of the protective cover for filtering the air entering the fan.

[0016] Beneficial effects

[0017] This invention provides a drying oven for pre-oriented polyester POY yarn with an internal heat circulation assembly. Compared with the prior art, it has the following advantages:

[0018] 1. When the drying process is overdrying, the servo motor drives the gears to rotate, causing the two gear plates to move synchronously relative to each other, shortening the distance between the limit shafts and reducing the conveying length and drying time of the polyester pre-oriented yarn in the drying chamber; when the drying process is underdrying, the distance is increased by adjusting in the opposite direction, flexibly adapting to the drying needs of the polyester pre-oriented yarn, effectively avoiding overdrying or underdrying problems, and ensuring the drying quality of the polyester pre-oriented yarn.

[0019] 2. In this application, air is filtered through a filter cover and heated by a heating element before entering the main body of the drying chamber. The hot air after drying the pre-oriented polyester yarn enters the inner cavity of the protective cover (formed by the protective cover and the outer wall of the drying chamber) through the exhaust port. The residual heat is used to heat the outer shell of the drying chamber, reducing the temperature difference between the inside and outside to reduce heat loss. The hot air flowing out of the inner cavity is dried by the drying plate and can be sent back into the drying chamber by the fan, reducing the heat consumption of the heating element, achieving significant energy saving, and improving the energy efficiency of the drying chamber. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0022] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4 This is a schematic diagram of the telescopic component structure of this utility model.

[0024] In the diagram: 1. Drying oven body; 2. Adjustment mechanism; 21. Telescopic assembly; 211. Servo motor; 212. Mounting bracket; 213. Gear; 214. Tooth plate; 215. Slider; 216. Traction shaft; 217. Limiting shaft; 218. Polyester pre-oriented yarn; 22. Heat recovery assembly; 221. Protective cover; 222. Exhaust port; 223. Air outlet; 224. Drying plate; 225. Filter cover; 226. Fan; 227. Heating element. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution: a drying oven for pre-oriented polyester POY yarn with an internal heat circulation component, comprising a drying oven body 1, and an adjustment mechanism 2 provided on the outer side of the drying oven body 1, the adjustment mechanism 2 comprising:

[0027] The telescopic assembly 21 includes two gears 213 rotatably mounted inside the drying chamber body 1. Each gear 213 has a drive assembly on one side. Each gear 213 has two diagonally distributed toothed plates 214 on both sides. The toothed plates 214 mesh with the gears 213. The drying chamber body 1 has two diagonally distributed limiting shafts 217 inside. The two ends of the two limiting shafts 217 are fixedly mounted on opposite sides of one end of the toothed plates 214. The middle of the drying chamber body 1 has two diagonally distributed traction shafts 216 fixedly mounted. The outer surfaces of the traction shafts 216 and the limiting shafts 217 are provided with multiple polyester pre-oriented yarns 218. The polyester pre-oriented yarns 218 can be guided by their own outer surfaces, so that the polyester pre-oriented yarns 218 are transported along a predetermined route.

[0028] The heat recovery component 22 is located on the outside of the drying chamber body 1 and is used to recycle hot air.

[0029] The heat recovery assembly 22 includes a protective cover 221. Two symmetrically distributed air outlets 223 are fixedly installed on the lower part of the protective cover 221. Two symmetrically distributed drying plates 224 are fixedly installed on the lower part of the protective cover 221. A fan 226 is fixedly installed at the bottom center of the drying chamber body 1. The fan 226 can be a 4-72-6C-15KW centrifugal fan, which has the characteristics of large air volume, low noise and high efficiency. A heating element 227 that works in conjunction with the fan 226 is fixedly installed on the lower part of the drying chamber body 1. The heating element 227 is a SRY2-220 / 3-4.5 tubular electric heater with a rated voltage of 220V, a power of 4.5kW and a maximum operating temperature of ≤450℃. The heating element 227 can precisely control the air heating temperature to ensure stable drying heat.

[0030] The drive assembly includes mounting brackets 212 fixedly installed on both sides of the protective cover 221. A servo motor 211 is fixedly installed on the top of each of the two mounting brackets 212. The middle of one side of each of the two gears 213 is fixedly installed on the drive end of the servo motor 211. The servo motor 211 can be an AC servo synchronous motor with model number 180DSAI-1808815-NT. The servo motor 211 is matched with the production line speed. The encoder signal of the main drive motor of the production line is collected by the PLC controller, and the operating parameters of the servo motor 211 are dynamically adjusted according to the production line speed. This avoids the polyester pre-oriented yarn 218 from breaking or tangling due to the servo motor 211 failing to match the production speed of the production line when adjusting the two limit shafts 217.

[0031] A slider 215 is fixedly installed on one side of each of the multiple toothed plates 214. The inner wall of the drying oven body 1 is provided with multiple sliding grooves that cooperate with the slider 215. Through the setting of the slider 215 and the sliding groove, the cross section of the slider 215 and the sliding groove is T-shaped, which can guide the toothed plates 214 while limiting and fixing them.

[0032] An exhaust port 222 is provided at the top center of the drying oven body 1. The exhaust port 222 is interconnected with the inner cavity of the protective cover 221. The interconnection between the exhaust port 222 and the inner cavity of the protective cover 221 allows the hot air after use to continue circulating through the inner cavity to heat the outer shell of the drying oven body 1, avoiding excessive temperature difference between the inside and outside of the drying oven body 1, which would cause the heat of the drying oven body 1 to dissipate too quickly and thus increase energy consumption.

[0033] A filter cover 225 is fixedly installed at the bottom of the protective cover 221 to filter the air entering the fan 226, so as to prevent impurities in the air from being blown into the drying chamber body 1 and causing the polyester pre-oriented yarn 218 to be contaminated.

[0034] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0035] During operation, the polyester pre-oriented yarn 218 first enters from the upper side of the drying chamber body 1, passes the upper surface of the upper traction shaft 216, then passes around the right outer surface of the upper limiting shaft 217, passes around the left outer surface of the lower limiting shaft 217, and after passing the upper surface of the lower traction shaft 216, it is conveyed out through the lower side of the drying chamber body 1. That is, this route is the flow route of the polyester pre-oriented yarn 218 in the drying chamber body 1.

[0036] When the polyester pre-oriented yarn 218 is over-dried, two servo motors 211 can rotate synchronously, driving the gear 213 to rotate. This causes the two toothed plates 214, which are meshed with the gear 213, to move synchronously relative to each other. This causes the upper limit shaft 217 and the lower limit shaft 217 to move relative to each other, shortening the distance between them. Consequently, the conveying length of the polyester pre-oriented yarn 218 in the drying chamber body 1 is shortened, thus shortening the time it takes for the polyester pre-oriented yarn 218 to pass through and reducing the drying time. This avoids over-drying. When the drying is insufficient, under the reverse drive of the servo motors 211, the two limit shafts 217 can move in opposite directions, increasing the distance between them. This results in a longer conveying length of the polyester pre-oriented yarn 218, thus increasing the drying time.

[0037] During drying, air is filtered through filter cover 225 and then blown out towards the drying chamber body 1 by fan 226. Heated by heating element 227, the hot air enters the drying chamber body 1, where it flows evenly to dry the polyester pre-oriented yarn 218. With the continuous output of fan 226, the hot air dried from the polyester pre-oriented yarn 218 enters the inner cavity of protective cover 221 through exhaust port 222. This inner cavity is formed by the inner wall of protective cover 221 and the drying chamber body. The sealing and installation of the outer wall allows hot air to circulate within the inner cavity, utilizing the residual heat of the hot air to heat the outer shell of the drying chamber body 1. This prevents a large temperature difference between the inside and outside, which could lead to excessive heat loss. After flowing, the hot air is discharged through the air outlet 223 and dried by the drying plate 224 before being blown out from the input end of the fan 226. This allows the hot air to be drawn back into the drying chamber body 1 by the fan 226, reducing the heat consumption of the heating element 227 and thus reducing energy consumption.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polyester POY pre-oriented yarn drying oven with an in-cavity thermal cycle assembly, comprising a drying oven main body (1), characterized in that: The outer side of the drying box body (1) is provided with an adjusting mechanism (2), and the adjusting mechanism (2) comprises: The telescopic assembly (21) comprises two gear wheels (213) rotatably installed in the drying box body (1), one side of each of the two gear wheels (213) is provided with a driving assembly, and the two sides of each of the two gear wheels (213) are provided with two diagonal tooth plates (214). The tooth plates (214) are connected with the gear wheels (213) in meshing mode. The inside of the drying box body (1) is provided with two diagonal limiting shafts (217). The two ends of each of the two limiting shafts (217) are fixedly installed on the opposite side of one end of the tooth plate (214). The middle part of the drying box body (1) is fixedly provided with two diagonal traction shafts (216). The outer surface of the traction shaft (216) and the limiting shaft (217) is provided with a plurality of polyester pre-oriented yarns (218). The polyester pre-oriented yarns (218) can be guided by the outer surface of the traction shaft (216) and the limiting shaft (217) to be conveyed along a predetermined route. The heat recovery assembly (22) is arranged on the outer side of the drying box body (1) and is used for recycling the hot air.

2. The polyester POY pre-oriented yarn drying cabinet with in-cavity thermal cycle assembly according to claim 1, characterized in that: The heat recovery assembly (22) comprises a protective cover (221), two symmetrically distributed air outlets (223) are fixedly installed on the lower part of the protective cover (221), two symmetrically distributed drying plates (224) are fixedly installed on the lower part of the protective cover (221), a fan (226) is fixedly installed on the bottom end of the drying box body (1), and a heating element (227) is fixedly installed on the lower part of the drying box body (1) and cooperates with the fan (226).

3. The polyester POY pre-oriented yarn drying cabinet with in-cavity thermal cycle assembly according to claim 2, characterized in that: The driving assembly comprises two mounting racks (212) fixedly installed on the two sides of the protective cover (221), and a servo motor (211) is fixedly installed on the top end of each of the two mounting racks (212). The middle part of one side of each of the two gear wheels (213) is fixedly installed on the driving end of the servo motor (211).

4. The polyester POY pre-oriented yarn drying cabinet with in-cavity thermal cycling assembly of claim 1, wherein: A sliding block (215) is fixedly installed on one side of each of the plurality of tooth plates (214), and a plurality of sliding grooves (215) are formed in the inner wall of the drying box body (1).

5. The polyester POY pre-oriented yarn drying cabinet with in-cavity thermal cycling assembly of claim 2, wherein: An exhaust port (222) is formed in the middle of the top end of the drying box body (1), and the exhaust port (222) and the inner cavity of the protective cover (221) are in communication.

6. The polyester POY pre-oriented yarn drying cabinet with in-cavity thermal cycling assembly of claim 2, wherein: A filter cover (225) is fixedly installed on the bottom end of the protective cover (221) and is used for filtering the air entering the fan (226).

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