Drying oven assembly of double-layer stenter

Abstract

The utility model provides an oven assembly of a double-layer stenter, which comprises a plurality of oven units connected front and back, each oven unit comprises an upper-layer drying tunnel and a lower-layer drying tunnel, and each layer of drying tunnel comprises two groups of clip tracks arranged in parallel left and right and a heating component arranged below the clip tracks. The top end of each oven unit is connected with an exhaust main pipe through an exhaust branch pipe, and one end of the exhaust main pipe is connected with an exhaust fan. The drying oven assembly of the double-layer stenter can be applied to hot air tentering setting of a multi-layer hot air tentering setting structure, cloth passing through upper-layer cloth feeding enters the upper-layer drying tunnel, cloth passing through lower-layer cloth feeding enters the lower-layer drying tunnel, and therefore hot air tentering setting of an upper group of cloth and a lower group of cloth can be carried out through the same drying oven assembly. The occupied area of the oven assembly is saved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of tenter frame drying ovens, and in particular relates to the drying oven components of double-layer tenter frames. Background Technology

[0002] A tenter frame feeds unshaped fabric into the machine using a stripper. The operator attaches both ends of the fabric to a needle plate or fabric clip. The needle plate pulls the fabric into the drying oven as the machine moves. The drying oven is electrically heated and blown by a fan. After passing through several constant-temperature ovens with different temperature ranges, the fabric is tentered and shaped at the end. It is generally used for polyester and other chemical fiber products.

[0003] The tenter frame mainly consists of five parts: the feeding section, the weft yarn feeder, the chain, the drying oven, and the fabric doffing device. The feeding section comprises a feed trough and rollers. The fabric enters the feed trough, carrying the chemical additives, and then the rollers squeeze out the excess chemicals. When the weft yarn is angled forward on the right, the right side of the fabric is rotated forward to increase the right-side stroke until the fabric exit wheel is parallel to the weft yarn. When the weft yarn is angled forward on the left, the action is reversed. The stretching of the fabric on the tenter frame is generated by the chain. The tenter frame chain is driven by a high-power motor near the fabric doffing point. The chain is equipped with needle plates or fabric clamps. When the fabric enters the chain, the brush wheels on the pressure rollers press the fabric onto the small needles on the needle plates or clamp it onto the fabric clamps. The fabric then enters the drying oven under the drive of the two chains. Air, propelled by a circulating fan, is continuously sprayed onto the fabric surface through fine holes on a circular air jet frame. When hot air comes into contact with the wet cloth, its temperature drops while its humidity increases. The hot air is then exhausted through perforations on the circular air jet frame, passing below a filter. The heat exchanger, equipped with numerous thin fins, generates high-efficiency heat exchange. The cloth-feeding device includes a fabric-swinging wheel, a fabric-discharging wheel, and an anti-static eliminator.

[0004] Most existing tenter frames are single-layer structures, which have disadvantages such as occupying a large production space, low production efficiency, and lack of energy conservation and environmental protection. Utility Model Content

[0005] The present invention aims to solve the following technical problems: existing tenter frames are mostly single-layer structures, which have the disadvantages of occupying a large production space, low production efficiency and lack of energy saving and environmental protection. The present invention provides an oven assembly for a double-layer tenter frame, which enables the oven assembly to be applied to hot air tenter frame forming of multi-layer tenter frame structures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The drying oven assembly of the double-layer tenter frame includes several drying oven units connected front to back. Each drying oven unit includes two drying channels, one upper and one lower. Each drying channel includes two sets of fabric clip tracks arranged in parallel left and right, and a heating component arranged below the fabric clip tracks. The top of each drying oven unit is connected to an exhaust main pipe through an exhaust branch pipe. One end of the exhaust main pipe is connected to an exhaust fan.

[0008] As a preferred technical solution, the top and bottom sides and the left and right sides of the oven unit are enclosed by insulation plates.

[0009] As a preferred technical solution, the upper and lower drying tunnels are separated by a partition.

[0010] As a preferred technical solution, an oven door is provided on the left or right side of the oven unit.

[0011] As a preferred technical solution, the heating element adopts an S-shaped electric heating tube.

[0012] By adopting the above technical solution, this utility model has the following advantages:

[0013] This invention relates to a double-layer tenter frame drying oven assembly, applicable to hot air tenter frame structures with multi-layer hot air tenter frames. Fabric fed from the upper layer enters the upper drying tunnel, and fabric fed from the lower layer enters the lower drying tunnel. Therefore, the same drying oven assembly can perform hot air tenter frame forming for both upper and lower fabrics, saving floor space and improving production efficiency. The number of drying tunnels can be adjusted according to the number of feeding mechanisms to achieve hot air tenter frame forming for multiple fabrics. Furthermore, since the exhaust branch pipe is located at the top of the drying oven unit, and the hot airflow rises, the upper drying tunnel requires less energy due to the temperature influence of the hot airflow from the lower drying tunnel, thus saving energy consumption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a double-layer tenter frame;

[0015] Figure 2 This is a front view of a double-layer tenter frame;

[0016] Figure 3 This is a top view of a double-layer tenter frame;

[0017] Figure 4 This is a schematic diagram of the structure of two sets of fabric feeding devices;

[0018] Figure 5 This is a schematic diagram of the oven unit.

[0019] Figure 6 This is a side view of the oven unit;

[0020] Figure 7 This is a schematic diagram of the structure of two sets of fabric feeding and unloading devices;

[0021] In the picture:

[0022] 1-Upper tension bar; 2-Upper fabric tensioner; 3-First fabric feed guide roller; 4-Lower tension bar; 5-Lower fabric tensioner; 6-Second fabric feed guide roller; 7-Fifth fabric feed guide roller; 8-Lower fabric centering device; 9-Seventh fabric feed guide roller; 10-Lower traction head; 11-Third fabric feed guide roller; 12-Fourth fabric feed guide roller; 13-Upper fabric centering device; 14-Sixth fabric feed guide roller; 15-Upper traction head; 16-Top cover; 17-Fog outlet; 18-Upper fabric feed clamp track; 19-Water receiving tank; 20-Lower fabric feed clamp track; 24-Drying oven unit; 25-Exhaust support Pipe; 26-Exhaust main pipe; 27-Exhaust fan; 28-Upper layer fabric outlet clamp track; 29-Upper layer fabric clamp; 30-Lower layer fabric clamp; 31-Drying oven fabric clamp track; 32-Heating component; 33-Partition; 34-Lower layer fabric outlet clamp track; 35-Upper layer fabric outlet roller; 36-Upper layer fabric outlet traction roller; 37-First fabric outlet guide roller; 38-Second fabric outlet guide roller; 39-Fifth fabric outlet guide roller; 40-Fourth fabric outlet guide roller; 41-Lower layer fabric outlet roller; 42-Lower layer fabric outlet traction roller; 43-Third fabric outlet guide roller; 44-Crank roller; 45-Swing frame; 46-Falling fabric traction roller; 47-Falling fabric roller. Detailed Implementation

[0023] 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.

[0024] like Figure 1-7 As shown, the double-layer tenter frame includes: two sets of fabric feeding devices, a heating device, and two sets of fabric dispensing devices arranged sequentially from front to back.

[0025] Two sets of fabric feeding devices are arranged vertically. Each set of fabric feeding devices includes: a flat-width fabric feeding mechanism, a fabric centering device, a traction head, a drafting mechanism, and a spray humidification structure. After the fabric passes through the flat-width fabric feeding mechanism and the fabric centering device in sequence, it is pulled by the traction head and enters the drafting mechanism. The spray humidification mechanism is located at the drafting mechanism to spray and humidify the fabric at the drafting mechanism.

[0026] The flat fabric feeding mechanism includes, from front to back, a tension bar, a fabric tensioner, and a fabric guide roller. The fabric tensioner includes a tensioner bracket, an adjusting mechanism, and two tensioning rods. The spindle of the tensioner bracket is rotatably connected to the frame of the double-layer tenter frame. The two tensioning rods are rotatably connected to the tensioner bracket via bearings and are arranged parallel to each other. The adjusting mechanism includes an adjusting rod, a worm gear, and a worm. The worm gear is fixedly connected to the spindle of the tensioner bracket, and the worm is connected to the adjusting rod. When the operator rotates the adjusting rod, the worm gear drives the worm gear, causing the tensioner bracket connected to the worm gear to rotate. This changes the relative position of the two tensioning rods fixed to the tensioner bracket, thus changing the wrapping angle of the fabric on the tensioning rods and adjusting the fabric tension. Alternatively, ratchet wheels, pawls, or movable pins may also be used as the adjusting mechanism.

[0027] The upper-layer flat-width fabric feeding mechanism includes an upper-layer tension bar 1, an upper-layer fabric tensioner 2, a first fabric feeding guide roller 3, a second fabric feeding guide roller 6, a third fabric feeding guide roller 11, and a fourth fabric feeding guide roller 12. The lower-layer flat-width fabric feeding mechanism includes a lower-layer tension bar 4, a lower-layer fabric tensioner 5, and a fifth fabric feeding guide roller 7.

[0028] The upper fabric passes over the upper tension bar 1 from above, then passes over the upper tensioner 2 from below, then passes over the first feed guide roller 3 and the second feed guide roller 6 from above, then passes over the third feed guide roller 11 from below, then passes over the fourth feed guide roller 12 from above, and then enters the upper fabric centering device 13.

[0029] The lower layer fabric passes over the lower layer tension bar 4 from above, then passes over the lower layer tensioner 5 from below, then passes over the fifth feed guide roller 7 from above, and then enters the lower layer fabric centering device 8.

[0030] The position and number of each feed roller can be changed according to the specific layout of the site, as long as the feed trajectories of the upper and lower layers of fabric do not interfere with each other.

[0031] The flat-width feeding mechanism ensures that the fabric enters the gripping point of the double-layer tenter machine from the center position without wrinkles under a certain tension for continuous operation.

[0032] A sixth feed guide roller 14 is provided below the upper fabric centering device 13, which is used to guide the upper fabric into the upper traction head 15; a seventh feed guide roller 9 is provided below the lower fabric centering device 8, which is used to guide the lower fabric into the lower traction head 10. The upper traction head 15 and the lower traction head 10 are used to provide the traction force for the upper fabric feed and the traction force for the lower fabric feed, respectively.

[0033] The drafting mechanism includes two fabric clips and two sets of fabric feed clip tracks. The two fabric clips are respectively set at the front end of the two sets of fabric feed clip tracks. The two fabric clips fasten the fabric, and the fabric moves along the two sets of fabric feed clip tracks on both sides. The drafting mechanism applies tension to both sides of the fabric to flatten the fabric surface.

[0034] The upper layer cloth clamp 29 and the upper layer cloth feed clamp track 18 are positioned above the lower layer cloth clamp 30 and the lower layer cloth feed clamp track 20, so that the upper layer cloth feed clamp track 18 is connected to the upper layer oven cloth clamp track 31 of the oven unit 24, and the lower layer cloth feed clamp track 20 is connected to the lower layer oven cloth clamp track 31 of the oven unit 24.

[0035] The spray humidification mechanism includes a top cover 16, a plurality of spray heads, and a water collection tank 19. The plurality of spray heads are positioned directly above the drafting mechanism, spraying water onto the fabric below to saturate it with moisture. The top cover 16 covers the plurality of spray heads, and a mist exhaust port 17 is located in the center of the top cover 16. The water collection tank 19 is positioned below the drafting mechanism, and directly below the plurality of spray heads.

[0036] The heating device includes several oven units 24 connected in sequence. Each oven unit 24 includes upper and lower drying tunnels, which are separated by a partition 33 to prevent water, oil, and impurities falling from the upper drying tunnel into the lower drying tunnel. The frame of the oven unit 24 is directly installed on the ground, without the need for additional H-beams.

[0037] The top, bottom, left, and right sides of the oven unit 24 are enclosed by insulation panels. This allows the lower drying tunnel to save approximately one-quarter of its energy consumption. Since hot air rises, the temperature of the upper drying tunnel is higher than that of the lower tunnel. In addition to saving approximately one-quarter of energy through the insulation panels, the upper drying tunnel can save an additional quarter of energy, resulting in a total energy saving of nearly half. This two-layer drying tunnel structure not only saves space occupied by the double-layer tenter frame but also reduces its energy consumption.

[0038] A double-opening oven door is provided on the left or right side of the oven unit 24 for easy maintenance and repair. An insulation panel for sealing this side can be embedded inside the oven door. The oven door is approximately 75cm wide and has a handle switch.

[0039] Each drying tunnel includes two sets of oven rack tracks 31 arranged in parallel left and right, and a heating element 32 located below the oven rack tracks 31. In this embodiment, the heating element 32 is an S-shaped electric heating tube.

[0040] Each oven unit 24 has an exhaust main pipe 26 connected to its top via an exhaust branch pipe 25. One end of the exhaust main pipe 26 is connected to an exhaust fan 27. In this embodiment, two exhaust fans 27 are provided, each connected to one exhaust main pipe 26. The exhaust fans 27 are used to remove hot steam from the oven unit 24.

[0041] It should be understood that more layers of fabric feeding devices can be set, and the number of drying tunnel layers corresponding to the drying oven unit 24 can be set according to the number of fabric feeding devices set.

[0042] The fabric feeding and discharging device includes: two sets of fabric feeding rails, two sets of fabric feeding mechanisms, and two sets of fabric discharging mechanisms arranged sequentially from front to back.

[0043] The upper layer fabric outlet rail 28 is positioned above the lower layer fabric outlet rail 34. The upper layer fabric outlet rail 28 is connected to the upper layer oven fabric outlet rail 31 of the oven unit 24, and the lower layer fabric outlet rail 34 is connected to the lower layer oven fabric outlet rail 31 of the oven unit 24.

[0044] The upper fabric feeding mechanism is located at the rear end of the upper fabric feeding clamp track 28, and the lower fabric feeding mechanism is located at the rear end of the lower fabric feeding clamp track 34. The fabric feeding mechanism includes a fabric feeding roller, a fabric feeding traction roller, and a fabric feeding guide roller.

[0045] The fabric delivery roller has several grooves, which increase the contact area between the fabric and the roller and increase the friction between them. In one embodiment, these grooves are threaded and split from the center of the delivery roller. The delivery roller has left-hand and right-hand threads symmetrically distributed. When the fabric passes through its surface, it comes into close contact with the inclined surface of the threaded grooves. Relying on the frictional resistance, the fabric stretches along the weft direction, producing a widening effect.

[0046] The fabric passes between the feed roller and the feed traction roller, which is driven to rotate by the feed motor. The feed roller is connected to a cooling water pipe, which injects cooling water into the feed roller to cool it down, thus enabling the feed roller to cool the fabric delivered from the heating device.

[0047] The lower fabric feeding mechanism is located behind the upper fabric feeding mechanism. The fabric fed out by the upper fabric feeding mechanism enters the upper fabric feeding mechanism after passing through several fabric feeding guide rollers, and the fabric fed out by the lower fabric feeding mechanism enters the lower fabric feeding mechanism after passing through several fabric feeding guide rollers.

[0048] In this embodiment, the upper fabric delivery mechanism includes an upper fabric delivery roller 35, an upper fabric delivery traction roller 36, a first fabric delivery guide roller 37, a second fabric delivery guide roller 38, and a third fabric delivery guide roller 43. The fabric delivered from the upper fabric delivery clamp track 28 is pulled out by the upper fabric delivery roller 35 and the upper fabric delivery traction roller 36, and sequentially passes through the first fabric delivery guide roller 37, the second fabric delivery guide roller 38, and the third fabric delivery guide roller 43 before entering the upper fabric dropping mechanism. The lower fabric delivery mechanism includes a lower fabric delivery roller 41, a lower fabric delivery traction roller 42, a fourth fabric delivery guide roller 40, and a fifth fabric delivery guide roller 39. The fabric delivered from the lower fabric delivery clamp track 34 is pulled out by the lower fabric delivery roller 41 and the lower fabric delivery traction roller 42, and sequentially passes through the fourth fabric delivery guide roller 40 and the fifth fabric delivery guide roller 39 before entering the lower fabric dropping mechanism.

[0049] The position and number of each fabric guide roller can be changed according to the specific layout of the site, as long as the fabric output trajectories of the upper and lower layers of fabric do not interfere with each other.

[0050] The fabric dropping mechanism includes: a crank roller 44, a swing frame 45, a fabric dropping traction roller 46, and two fabric dropping rollers 47.

[0051] The swing frame 45 is fixedly mounted on the frame of the double-layer tenter frame via a swing frame shaft. The fabric dropping traction roller 46 is rotatably connected to the swing frame shaft, which is located at the upper end of the swing frame 45. Two fabric dropping rollers 47 are rotatably connected to the lower end of the swing frame 45 and are arranged vertically separated. The crank roller 44 is connected to the swing frame 35 via a connecting rod 48. One end of the connecting rod 48 is eccentrically connected to the crank roller 44, and the other end is connected to the middle of the swing frame 45. The crank roller 44 is driven by a crank roller motor 49 to rotate at a constant angular velocity, and then the swing frame 45 reciprocates through the transmission of the connecting rod 48. The fabric dropping traction roller 46 is driven by a fabric dropping traction roller motor 50 to rotate at a constant angular velocity, providing traction force for fabric dropping. The fabric first passes around the fabric traction roller 46, and then is wrapped around the two fabric drop rollers 47 in an S-shape. During the oscillating fabric drop process, the fabric can always be in contact with the roller surfaces of the upper and lower fabric drop rollers 47.

[0052] The fabric dropping mechanism lays the flat fabric guided by the fabric dropping traction roller 46 flat and folds it into the fabric stacking cart or fabric stacking board with an appropriate swing.

[0053] In this embodiment, the structure of the fabric drop traction roller 46 is the same as that of the fabric output roller, that is: the fabric drop traction roller 46 is provided with several grooves; the fabric drop traction roller 46 is connected to a cooling water pipe, and the cooling water pipe injects cooling water into the fabric drop traction roller 46 to achieve cooling and temperature reduction of the fabric drop traction roller 46, thereby enabling the fabric drop traction roller 46 to be used for the second cooling and temperature reduction of the fabric sent out from the fabric output mechanism.

[0054] The working method of the above-mentioned double-layer tenter includes:

[0055] The upper layer fabric is fed through the upper layer flat-width feeding mechanism, and the lower layer fabric is fed through the lower layer flat-width feeding mechanism.

[0056] The upper and lower layers of fabric are weft-aligned using a disc weft straightener.

[0057] The upper layer fabric is pulled in by the upper traction vehicle, and the lower layer fabric is pulled in by the lower traction vehicle.

[0058] The upper fabric is aligned by an upper fabric alignment device, and the lower fabric is aligned by a lower fabric alignment device.

[0059] The upper drafting mechanism applies tension to both sides of the upper fabric to flatten the fabric surface, and the upper fabric is sprayed with moisture by the upper spray humidification mechanism. The lower drafting mechanism applies tension to both sides of the lower fabric to flatten the fabric surface, and the lower fabric is sprayed with moisture by the lower spray humidification mechanism.

[0060] The moist upper layer fabric enters the upper drying tunnel of each drying unit of the heating device, and the moist lower layer fabric enters the lower drying tunnel of each drying unit of the heating device, and the upper and lower layers fabrics are stretched by hot air.

[0061] The upper fabric leaves the heating device and is pulled out through the upper fabric exit mechanism and cooled for the first time; the lower fabric leaves the heating device and is pulled out through the lower fabric exit mechanism and cooled for the first time.

[0062] The upper layer fabric enters the upper layer fabric dropping mechanism for oscillating dropping and stacking, and undergoes a second cooling process. The lower layer fabric enters the lower layer fabric dropping mechanism for oscillating dropping and stacking, and undergoes a second cooling process.

[0063] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The drying oven assembly of a double-layer tenter frame, characterized in that, It includes several oven units connected front to back. Each oven unit includes several two-layer drying tunnels. Each drying tunnel includes two sets of cloth rails arranged in parallel left and right and heating components arranged below the cloth rails. The top of each oven unit is connected to an exhaust main pipe through an exhaust branch pipe. One end of the exhaust main pipe is connected to an exhaust fan.

2. The drying oven assembly of the double-layer tenter according to claim 1, characterized in that, The top, bottom, left, and right sides of the oven unit are enclosed by insulation panels.

3. The drying oven assembly of the double-layer tenter according to claim 1, characterized in that, Adjacent drying tunnels are separated by partitions.

4. The drying oven assembly of the double-layer tenter according to claim 1 or 2, characterized in that, An oven door is provided on the left or right side of the oven unit.

5. The drying oven assembly of the double-layer tenter according to claim 1, characterized in that, The heating element uses an S-shaped electric heating tube.

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