Extra narrow oil-free steel guide rails

Abstract

The present invention discloses an extra-narrow oil-free steel plate guide rail, wherein an arc-shaped diameter-changing mechanism is respectively fixedly arranged on the outer sides of the cloth-inlet section guide rail and the cloth-outlet section guide rail, and comprises: an inner convex arc section close to a connection joint, an outer convex arc section far from the connection joint, and an oblique straight transition section located between the inner convex arc section and the outer convex arc section for smoothly connecting the inner convex arc section and the outer convex arc section, wherein the oblique straight transition section is inclined inwardly from the direction of the outer convex arc section to the inner convex arc section; through the transition of the two arc-shaped diameter-changing mechanisms, the rear end of the cloth-inlet section guide rail is straightly connected to the front end of the shaping section guide rail, and the front end of the cloth-outlet section guide rail is straightly connected to the rear end of the shaping section guide rail. When the width L of the cloth is determined, the energy consumption of the stenter heat setting machine using the extra-narrow oil-free steel plate guide rail is lower than that of the stenter heat setting machine using the traditional oil-free steel plate guide rail.

Description

Technical Field

[0001] The invention relates to a tentering heat setting machine used in the printing and dyeing industry, and in particular to a guide rail in the heat setting machine. Background Art

[0002] The working process of the stenter heat setting machine is as follows: flat cloth feeding → thread expansion → infrared centering → rolling car → disc weft straightening → lower overfeeding → mechanical weft straightening → thread expansion → upper overfeeding → edge stripping → infrared edge detection → upper needle → sizing edge → stentering or heat setting → cold air cooling → edge cutting, edge suction → needle removal → swing-type cloth dropping or small rolling. Two long circular guide rails with open ends are arranged side by side in the stenter heat setting machine, and the two long circular guide rails run through the drying room of the stenter heat setting machine from front to back. Usually, the guide rail in front of the drying room is called the cloth feeding section guide rail, the guide rail in the drying room is called the setting section guide rail, and the guide rail at the back of the drying room is called the cloth outlet section guide rail. Figure 1 As shown, the front end of each guide rail is connected to a front mounting seat for mounting a driven sprocket, and the end is connected to a terminal mounting seat for mounting a driving sprocket. The driven sprocket on the front mounting seat and the driving sprocket on the terminal mounting seat are movably connected through a chain 11, and a needle clip 12 is provided on the chain. During operation, the two ends of the cloth width are respectively hung on the needle clips 12 on the adjacent sides between the two guide rails. The spacing between the needle clips 12 on the adjacent sides is the width L of the cloth. The driving device drives the two driving sprockets to rotate, so that the two chains 11 respectively make a circular operation in the guide grooves 14 of the corresponding guide rails. With the operation of the chain 11, the needle clip 12 takes the cloth from front to back through the cloth inlet section guide rail set in front of the drying room, then enters the shaping section guide rail set in the drying room, and finally enters the cloth outlet section guide rail set at the rear of the drying room to remove the cloth and obtain the shaped cloth. The drying room uses hot air to set the cloth, and has several different temperature sections. The temperature in the highest temperature section can reach 230°C. The drying room is also long, so each guide rail used in the stenter heat setting machine is formed by connecting several guide rail sections in sequence, and the length of each guide rail section is between 2.8 and 3 meters. Usually, one or two guide rail sections are set in the guide rail of the cloth inlet section, and one guide rail section is set in the guide rail of the cloth outlet section. The number of guide rail sections in the setting section is determined according to the length of the drying room. Generally, 4-10 guide rail sections are set, and each adjacent two guide rail sections are connected by a connecting joint. For the convenience of description, the side of each guide rail close to the corresponding drying room wall is called the outer side, and the side away from the corresponding drying room wall is called the inner side.

[0003] The guide rails in the stenter heat setting machine are of two types according to the material: cast iron guide rails and oil-free steel plate guide rails. Since the chain 11 needs to add lubricating oil when running in the cast iron guide rail, the lubricating oil will evaporate at high temperature after entering the drying room, making the cloth yellow and affecting the quality of the cloth, while the chain 11 does not need to add lubricating oil when running in the oil-free steel plate guide rail, which can ensure the quality of the cloth.

[0004] like Figure 1 As shown, each section of the oil-free steel plate guide rail commonly used in the tenter heat setting machine currently includes: two "C"-shaped channel steels 51 located on the inner and outer sides of the guide rail section, respectively, and a plurality of transverse connecting plates 52 are arranged between the two channel steels 51. The inner and outer ends of each transverse connecting plate 52 are respectively welded to the two channel steels 51, and the transverse spacing d between the two channel steels 51 determines the width of the guide rail section. Therefore, when designing a drying room, the factors affecting the width of the drying room include: the transverse spacing d and the width L of the cloth. In order to reduce energy consumption, it is necessary to reduce the width of the drying room as much as possible. When the width L of the cloth is determined, the transverse spacing d needs to be as small as possible while ensuring the strength of the guide rail section. During actual manufacturing, since the two channel steels 51 in the oil-free steel plate guide rail are made of straight steel plates directly folded, the oil-free steel plate guide rail adopts a front-to-back straight structure. Since the cylinder used to tighten the chain 11 needs to be set in the spacing d at the front end of the cloth-inlet section guide rail, the lateral spacing d between the two channel steels 51 in each guide rail section is relatively large, usually 202 mm. The cast iron guide rail is cast as a whole during manufacturing, and streamlined diameter reduction can be performed in the cloth-inlet section guide rail and the cloth-outlet section guide rail during casting. Therefore, under the premise of ensuring the strength of the guide rail section of the cast iron guide rail, the lateral spacing d in each guide rail section in the shaping section guide rail in the drying room can be greatly reduced, so that the lateral spacing d in each guide rail section in the drying room is 60 mm, thereby achieving the purpose of reducing energy consumption. Therefore, when the width L of the cloth is determined, the width of the drying room of the stenter heat setting machine using oil-free steel plate guide rails is 284 mm wider than that of the stenter heat setting machine using cast iron guide rails, resulting in a larger energy consumption of the stenter heat setting machine using oil-free steel plate guide rails than that of the stenter heat setting machine using cast iron guide rails. Therefore, it is necessary to develop an ultra-narrow oil-free steel plate guide rail, in which the transverse spacing d between the channel steels on the inner and outer sides of the guide rail section in the shaping section of the ultra-narrow oil-free steel plate guide rail is smaller than the transverse spacing d between the channel steels on the inner and outer sides of the guide rail section in the shaping section of the traditional oil-free steel plate guide rail, so that the stenter heat setting machine using this ultra-narrow oil-free steel plate guide rail can retain the advantage of not yellowing the cloth during shaping, and when the width L of the cloth is determined, the energy consumption is lower than that of the stenter heat setting machine using the traditional oil-free steel plate guide rail.

[0005] Since the lateral spacing d between the two channel steels 51 in each guide rail section of the traditional oil-free steel plate guide rail is 202 mm, the connecting joints used in the traditional oil-free steel plate guide rail include: an upper joint embedded between the channel steels 51 on the inner and outer sides of the end of the previous guide rail section, and a lower joint embedded between the channel steels 51 on the inner and outer sides of the front end of the next guide rail section. The upper joint and the lower joint are movably connected by bolts, and a rotation gap is left between the previous guide rail section and the next guide rail section, so that the two adjacent guide rail sections can rotate relative to each other, thereby adjusting the width L of the cloth. Since the spacing between the channel steels on the inner and outer sides of the guide rail section in the formed section guide of the extra-narrow oil-free steel plate guide rail is smaller than the lateral spacing d between the channel steels 51 on the inner and outer sides of the guide rail section in the formed section guide of the traditional oil-free steel plate guide rail, which can be 60 mm, the connecting joints used in the extra-narrow oil-free steel plate guide rail must be able to conveniently and efficiently fine-tune the width L of the cloth while ensuring the strength of the guide rail section connection. However, the connection structure between the above-mentioned traditional guide rail sections is difficult to be well applied to the extra-narrow oil-free steel plate guide rail. Summary of the invention

[0006] The object of the present invention is to provide an extra narrow oil-free steel plate guide rail, which can retain the advantage of not yellowing the cloth during the setting process of the tenter heat setting machine using the extra narrow oil-free steel plate guide rail, and when the cloth width L is determined, the energy consumption is lower than that of the tenter heat setting machine using the traditional oil-free steel plate guide rail. A further object of the present invention is to conveniently and efficiently fine-tune the cloth width while ensuring the connection strength of adjacent guide rail sections.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an extra-narrow oil-free steel plate guide rail, which includes, from front to back, an inlet section guide rail, a forming section guide rail, and an outlet section guide rail; the front end of the inlet section guide rail can be connected to the front end mounting seat for installing the driven sprocket; the rear end of the outlet section guide rail can be connected to the end mounting seat for installing the driving sprocket; each two adjacent guide rail sections in the guide rail are connected by a connecting joint; it is characterized in that: the lateral spacing between the inner and outer sides of the front end of the inlet section guide rail and the lateral spacing between the inner and outer sides of the rear end of the outlet section guide rail are the same, and are both larger than the lateral spacing between the inner and outer sides of the guide rail sections in the forming section guide rail, and each guide rail section in the forming section guide rail is a front-to-back straight structure; an air gap for tensioning the chain can be set between the inner and outer sides of the channel steels at the front end of the inlet section guide rail. Cylinder, an arc-shaped reducing mechanism is arranged in a guide rail section of the cloth-inlet section guide rail located at the rear side of the cylinder and in front of the drying room, and an arc-shaped reducing mechanism is also arranged in the cloth-outlet section guide rail, through the transition of the two arc-shaped reducing mechanisms, the rear end of the cloth-inlet section guide rail is straightly connected with the front end of the shaping section guide rail, and the front end of the cloth-outlet section guide rail is straightly connected with the rear end of the shaping section guide rail; the arc-shaped reducing mechanisms are respectively fixedly arranged on the outer sides of the cloth-inlet section guide rail and the cloth-outlet section guide rail, including: an inner convex arc section close to the connecting joint, an outer convex arc section away from the connecting joint, and an oblique straight transition section located between the inner convex arc section and the outer convex arc section for smoothly connecting the inner convex arc section and the outer convex arc section, the oblique straight transition section is inclined inward from the direction of the outer convex arc section to the inner convex arc section.

[0008] Furthermore, in the aforementioned ultra-narrow oil-free steel plate guide rail, the front-to-back length range of the arc-shaped diameter-changing mechanism is 900-1000 mm, the curvature range of the outer convex arc segment and the inner convex arc segment is both 12-13°, and the front-to-back length of the oblique straight transition section accounts for 34%-39% of the front-to-back length of the arc-shaped diameter-changing mechanism.

[0009] Furthermore, in the aforementioned ultra-narrow oil-free steel plate guide rail, the front-to-rear lengths of the outer convex arc segment and the inner convex arc segment are the same, and the curvature and radius of the arc of the outer convex arc segment and the inner convex arc segment are the same.

[0010] Furthermore, in the aforementioned ultra-narrow oil-free steel plate guide rail, the arc-shaped diameter reducing mechanism and the inner channel steels on the front and rear sides thereof are fixed by welding; and transverse connecting plates are fixedly arranged between the outer convex arc section, the oblique straight transition section, the inner convex arc section and the relative outer channel steels.

[0011] Furthermore, in the aforementioned ultra-narrow oil-free steel plate guide rail, the outer convex arc section, the oblique straight transition section, and the inner convex arc section are fixed by welding to form an arc-shaped diameter-changing mechanism; the outer convex arc section becomes the inner convex arc section after rotation.

[0012] Furthermore, the aforementioned extra-narrow oil-free steel plate guide rail, wherein: in each two adjacent guide rail sections, a vertically placed joint plate is fixedly arranged between the inner and outer sides of the channel steels at the end of the previous guide rail section, and a vertically placed joint plate is also fixedly arranged between the inner and outer sides of the channel steels at the front end of the next guide rail section, and the connecting joint is connected to the two connecting plates in the two adjacent guide rail sections; the connecting joint comprises: two "L"-shaped mounting seats spaced apart and symmetrically arranged front and back, the inner and outer widths of the vertical connecting portion of each mounting seat being smaller than the lateral spacing between the inner and outer sides of the channel steels of the guide rail section, being able to extend into the lateral spacing between the inner and outer channels of the guide rail section, and being able to be fixedly connected with the corresponding joint plate, an arc-shaped boss is arranged at the bottom of the horizontal movable portion of each mounting seat, and the two arc-shaped bosses are both extended into the annular groove at the top of the dovetail slot slide plate below the two mounting seats, so that after the two horizontal movable portions cooperate with each other and are installed on the top of the dovetail slot slide plate, the centers of the two horizontal movable portions can leave space. A bolt through hole for the connecting bolt to pass through, and an adjustment gap between the two horizontal movable parts so that the two horizontal movable parts can rotate relative to each other. A step through hole is arranged at the center of the dovetail slot slide plate, and the aperture of the upper part of the step through hole is smaller than the aperture of the lower part. The step through hole and the bolt through hole are opposite to each other up and down, and the dovetail slot slide plate can be movably connected with the saddle; after the two mounting seats are connected to the dovetail slot slide plate with the connecting bolts and the pressing plate, there is a rotation gap between the pressing plate of the connecting bolt and the top end surface of the two horizontal mounting parts, so that the mounting seats can rotate along the annular groove after being subjected to force, so that the corresponding connecting ends of the two guide rail sections connected by the connecting joint can be offset to the outside or inside, thereby fine-tuning the width of the cloth; the shape of the adjustment gap meets the following requirements: the inner section of the adjustment gap formed by the spacing between the two horizontal movable parts and the outer section of the adjustment gap are symmetrically arranged, and gradually shrink from the inner and outer sides to the middle, until they are respectively connected to the bolt through holes, so that the bolt through holes become part of the adjustment gap.

[0013] Furthermore, the aforementioned ultra-narrow oil-free steel plate guide rail, wherein: the spacing range of the narrowest part of the adjustment gap is 2-3mm, and the angle ranges of the two side walls of the inner section of the adjustment gap and the two side walls of the outer section of the adjustment gap are both 11-13°.

[0014] Furthermore, in the aforementioned ultra-narrow oil-free steel plate guide rail, the curvature of the arc-shaped boss is greater than 90°, and both ends of the arc-shaped boss extend toward the side wall of the horizontal movable part until both end walls of the arc-shaped boss are flush with the side wall of the corresponding horizontal movable part.

[0015] Furthermore, the aforementioned ultra-narrow oil-free steel plate guide rail, wherein: a dovetail boss running forward and backward and having a trapezoidal cross-section is provided at the bottom of the dovetail slot slide, the length of the dovetail boss is consistent with the length of the dovetail slot slide, and a dovetail slot is provided downwardly at the top of the horse seat that can cooperate with the dovetail boss for sliding connection, thereby making the dovetail slot slide and the horse seat slidingly connected.

[0016] Furthermore, the aforementioned extra-narrow oil-free steel plate guide rail, wherein: the horse seat is movably supported on the cross beam of the forming machine by rollers arranged at intervals inside and outside, a split nut is installed on one side of the horse seat, the split nut is sleeved on the transmission screw, and a driving device for driving the transmission screw to rotate is also provided; when the width of the cloth needs to be fine-tuned, the transmission screw rotates, driving the split nut to move, thereby driving the horse seat connected to the split nut to move laterally on the cross beam of the forming machine, and the connecting joint moves with the horse seat, and the arc-shaped bosses of the two mounting seats in the connecting joint move along the annular groove, driving the end of the previous guide rail section and the front end of the next guide rail section connected thereto to deviate inward or outward, and the maximum distance is until the horizontal movable parts of the two mounting seats abut against each other, thereby fine-tuning the width of the cloth.

[0017] The beneficial effects of the present invention are as follows: 1. The arc-shaped diameter-changing mechanisms respectively fixedly arranged on the outer sides of the guide rails of the cloth-inlet section and the guide rails of the cloth-outlet section include: an outer convex arc section, an inner convex arc section, and an oblique straight transition section between the inner convex arc section and the outer convex arc section, and the oblique straight transition section is inclined inward from the direction of the outer convex arc section to the inner convex arc section. Through the arc-shaped diameter-changing mechanisms at both ends and the oblique straight diameter-changing mechanisms in the middle, a larger lateral diameter-changing distance can be completed within one guide rail section, and the chain drive can be carried out smoothly with less operating noise. In this way, the stenter heat setting machine with the extra-narrow oil-free steel plate guide rail having the arc-shaped diameter-changing mechanism can retain the advantage that the cloth will not turn yellow, and when the width L of the cloth is determined, the width of the drying room of the stenter heat setting machine with the extra-narrow oil-free steel plate guide rail is smaller, and the energy consumption is lower than that of the stenter heat setting machine with the traditional oil-free steel plate guide rail. Second, the further advantage of the present invention is that the length range of the arc-shaped diameter-changing mechanism is set at 900-1000 mm, so that the installation space of the cylinder for tensioning the chain and the telescopic space of the telescopic rod can be guaranteed, and the tensioning and chaining of the chain are not hindered. The arc range of the inner convex arc section and the outer convex arc section are both set at 12-13°, and the front and rear length of the oblique straight transition section accounts for 34%-39% of the front and rear length of the arc-shaped diameter-changing mechanism, which further enables the chain transmission to proceed smoothly, and the noise of the chain is very small when running. Third, the further advantage of the present invention is that the connecting joint set on the horse seat includes: two front-to-back symmetrical "L"-shaped mounting seats, the arc-shaped boss set at the bottom of the mounting seat can extend into the annular groove set at the top of the dovetail slot slide, the two mounting seats and the dovetail slot slide are connected by bolts, and the mounting seat can rotate along the annular groove after being subjected to force, so that the corresponding connection ends of the two guide rail sections connected to the mounting seat can be offset to the outside or inside, so that the width L of the cloth can be conveniently and efficiently fine-tuned under the premise of ensuring the connection strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of two conventional oil-free steel plate guide rails arranged in a stenter heat setting machine;

[0019] Figure 2 It is a schematic diagram of the top view of the structure of the ultra-narrow oil-free steel plate guide rail of the present invention;

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure viewed from above;

[0021] Figure 4 It is a top view structural diagram of the cloth feeding section guide rail and the front end mounting seat;

[0022] Figure 5 It is a top view structural diagram of the cloth-out section guide rail and the end mounting seat;

[0023] Figure 6 It is a schematic diagram of the top view structure of the guide rail section in the fixed section guide rail;

[0024] Figure 7 yes Figure 4 A schematic diagram of the structure of the arc-shaped reducing mechanism;

[0025] Figure 8 It is a structural schematic diagram of an arc-shaped reducing mechanism using tailor-made welding;

[0026] Fig. 9 yes Figure 3 A schematic diagram of the enlarged structure of part B;

[0027] Fig.10 It is a schematic diagram of the structure of two "L" shaped mounting bases;

[0028] Fig.11 yes Fig.10 A schematic diagram of a top view structure;

[0029] Fig.12 It is a schematic diagram of the structure of the dovetail slot slide from a top view;

[0030] Fig.13 yes Fig.12 AA cross-sectional structural diagram;

[0031] Fig.14 yes Fig. 9 A schematic diagram of a structure in which a horse seat is supported on a beam of a setting machine and a split nut is installed on the horse seat;

[0032] Fig.15 It is a schematic diagram of the structure of two opposing horse seats arranged on the crossbeam of the setting machine;

[0033] Fig.16 yes Fig.15 Schematic diagram of the enlarged structure of part C. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the extra narrow oil-free steel plate guide rail includes, from front to back, a cloth inlet section guide rail 2, a shaping section guide rail 3, and a cloth outlet section guide rail 4. For easier description, the front-to-back direction is referred to as the longitudinal direction, and the inside-outside direction is referred to as the transverse direction. In the present embodiment, a guide rail section is provided in the cloth-inlet section guide rail 2, and this guide rail section is called the first guide rail section 21. The front end of the first guide rail section 21 is connected to the front end mounting seat 62 for mounting the driven sprocket 61; the rear end of the terminal guide rail section 41 provided in the cloth-outlet section guide rail 4 is connected to the terminal mounting seat 64 for mounting the driving sprocket 63; every two adjacent guide rail sections in the guide rail are connected by a connecting joint; each guide rail section in the shaping section guide rail 3 is a front-to-back straight structure, and the lateral spacing between the channel steels 51 on the inner and outer sides of each guide rail section is 60 mm, and the lateral spacing between the channel steels on the inner and outer sides of the front end of the first guide rail section 21 and the lateral spacing between the channel steels on the inner and outer sides of the rear end of the terminal guide rail section 41 are the same, both of which are 202 mm, which is larger than the lateral spacing between the channel steels on the inner and outer sides of each guide rail section of the shaping section guide rail 3. A cylinder 65 for tensioning the chain can be arranged between the channel steels 51 on the inner and outer sides of the front end of the first guide rail section 21, and an arc-shaped reducing mechanism 7 is arranged in the first guide rail section 21 located at the rear side of the cylinder 65. Through the transition of the arc-shaped reducing mechanism 7, the lateral spacing between the channel steels 51 on the inner and outer sides of the rear end of the first guide rail section 21 is made the same as the lateral spacing between the channel steels 51 on the inner and outer sides of each guide rail section in the forming section guide rail 3, so that the rear end of the first guide rail section 21 can be docked with the front end of the forming section guide rail 3; an arc-shaped reducing mechanism 7 is also arranged in the terminal guide rail section 41. Through the transition of the arc-shaped reducing mechanism 7, the lateral spacing between the channel steels 51 on the inner and outer sides of the front end of the terminal guide rail section 41 is made the same as the lateral spacing between the channel steels 51 on the inner and outer sides of each guide rail section in the forming section guide rail 3, so that the front end of the terminal guide rail section 41 can be docked with the rear end of the forming section guide rail 3. The arc-shaped diameter-changing mechanism 7 is respectively fixedly arranged on the outer sides of the first guide rail section 21 and the end guide rail section 41, and includes: an inner convex arc section 73 close to the connecting joint, an outer convex arc section 71 away from the connecting joint, and an oblique straight transition section 72 located between the outer convex arc section 71 and the inner convex arc section 73 for smoothly connecting the outer convex arc section 71 and the inner convex arc section 73. The oblique straight transition section 72 is inclined inward from the direction of the outer convex arc section 71 to the inner convex arc section 73.

[0036] To change the lateral spacing between the two channel steels 51 at the rear end of the first guide rail section 21 to 60 mm, a lateral diameter change distance of 142 mm needs to be completed. However, if the chain 11 directly adopts an oblique straight diameter change method, the longitudinal length required to complete the 142 mm lateral diameter change distance under the premise that the chain drive can proceed smoothly is about 5 meters, that is, two guide rail sections are needed to complete the diameter change, and only one end guide rail section 41 is provided in the cloth outlet section guide rail 4, and a guide rail section in the shaping section guide rail 3 located in the front side of the drying room is needed to complete the 142 mm lateral diameter change distance. Since the cloth is shaped only after it leaves the drying room, when the cloth width L is determined, the width of the drying room in the stenter heat setting machine using an oblique straight diameter change is wider than the drying room of the stenter heat setting machine using an arc diameter change mechanism 7 to complete the diameter change in one guide rail section, and the energy consumption will become larger. The cylinder 65 for tensioning the chain 11 needs to be arranged between the channel steels 51 on the inner and outer sides of the front end of the first guide rail section 21. Therefore, the lateral spacing between the two channel steels 51 at the front end of the first guide rail section 21 is still 202 mm. The total length of the installation space of the cylinder 65 and the telescopic space of the telescopic rod is about 1.5 meters. Therefore, in actual use, even if an oblique straight diameter change is adopted to set two guide rail sections in the cloth feed section guide rail 2 to complete a lateral diameter change distance of 142 mm, the tensioning and chaining of the chain 11 will be affected due to the lack of installation space for the cylinder 65, and the oblique straight diameter change chain 11 will make a large noise during chain transmission. The length of the first guide rail section 21 and the end guide rail section 41 is usually 2.8 meters. Considering that the end of the first guide rail section 21 and the front end of the end guide rail section 41 need to reserve a connection length for connecting the connecting joint, after deducting the total length of 1.5 meters for the installation space of the cylinder 65 and the telescopic space of the telescopic rod, it is necessary to complete a 142 mm lateral diameter change distance within the longitudinal length range of 0.9-1 meter. Figure 4 , Figure 7The arc-shaped diameter-changing mechanism 7 includes: an inner convex arc segment 73 close to the connecting joint, an outer convex arc segment 71 away from the connecting joint, and an oblique straight transition segment 72 located between the outer convex arc segment 71 and the inner convex arc segment 73, so that when the chain 11 arranged in the front-to-back direction completes the lateral diameter change distance of 142 mm from the outside to the inside, it first changes to an inward arc shape through the outer convex arc segment 71, then changes to an inward oblique straight shape through the oblique straight transition segment 72, and finally changes to an inward arc shape through the inner convex arc segment 73. In this embodiment, the curvature range of the outer convex arc segment 71 and the inner convex arc segment 73 is 12-13°, and the front-to-back length of the oblique straight transition segment 72 accounts for 34%-39% of the front-to-back length of the arc-shaped diameter-changing mechanism 7, so that the lateral diameter-changing distance of 142 mm from the outside to the inside can be completed within the longitudinal length, i.e., the front-to-back length range of 900-1000 mm, and the tensioning and chaining of the chain 11 is not hindered, and the chain drive can be carried out smoothly and the noise is very small during operation. In this embodiment, the longitudinal length, i.e., the front-to-back length, of the inner convex arc segment 73 and the outer convex arc segment 71 are the same, and the curvature and radius of the arc of the inner convex arc segment 73 and the outer convex arc segment 71 are the same, thereby further ensuring the smoothness of the chain drive.

[0037] In actual use, if two guide rail sections are set in the fabric inlet section guide rail 2 due to the needs of the shaping process, the arc-shaped reducing mechanism 7 is preferably set in a guide rail section located at the front end, so that the same connecting joints can be used when connecting the guide rail sections of the ultra-narrow oil-free steel plate guide rail, which is convenient for subsequent maintenance.

[0038] In this embodiment, in order to strengthen the strength of the guide rail at the arc-shaped reducing mechanism 7, the arc-shaped reducing mechanism 7 and the outer channel steels 51 on its front and rear sides are fixed by welding; a transverse connecting plate 52 is fixedly arranged between the inner convex arc section 73, the oblique straight transition section 72, the outer convex arc section 71 and the corresponding inner channel steel 51.

[0039] The arc-shaped diameter-changing mechanism 7 can be manufactured by cutting the bottom plate and the two side plates separately and then welding them together. However, since the bottom plate and the two side plates both include the inner convex arc segment 73, the oblique straight transition segment 72, and the outer convex arc segment 71, the manufacturing process is relatively high. Figure 8 As shown, in this embodiment, the inner convex arc segment 73, the oblique straight transition segment 72, and the outer convex arc segment 71 are fixed by welding to form an arc-shaped diameter-changing mechanism 7. Since the inner convex arc segment 73 and the outer convex arc segment 71 have the same front-to-back length, and the arc and radius of the inner convex arc segment 73 and the outer convex arc segment 71 are the same, the manufactured inner convex arc segment 73 becomes the outer convex arc segment 71 after rotation, and the oblique straight transition segment 72 can be directly manufactured with channel steel. Compared with the previous manufacturing method, this manufacturing method has low requirements on the manufacturing process and can reduce the consumption of materials.

[0040] Since the connection joints used in the ultra-narrow oil-free steel plate guide rails need to ensure the strength of the guide rail joints and also be able to conveniently and efficiently fine-tune the width L of the cloth, this embodiment adopts the following method: Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 The connection joint shown. In each of the two adjacent guide rail sections, a vertically placed joint plate 53 is fixedly arranged between the inner and outer channel steels 51 at the end of the previous guide rail section, and a vertically placed joint plate 53 is also fixedly arranged between the inner and outer channel steels 51 at the front end of the next guide rail section. The connection joint is connected to both connection plates 53 in the two adjacent guide rail sections; the connection joint includes: two "L"-shaped mounting seats 81 spaced apart and symmetrical in front and back, and the inner and outer width of the vertical connection portion 811 of each mounting seat 81 is less than 60mm, and can be inserted into the inner and outer channel steels 51 of the guide rail section. 1, and can be fixed with the corresponding joint plate 53 by bolts. A circular arc boss 813 is set at the bottom of the horizontal movable part 812 of each mounting seat 81. The two circular arc bosses 813 are both extended into the circular ring groove 821 at the top of the dovetail slot slide 82 located below the two mounting seats 81, so that after the two horizontal movable parts 812 are mutually matched and installed on the top of the dovetail slot slide 82, a bolt through hole 814 for the connecting bolt 83 to pass through is reserved in the center of the two horizontal movable parts 812, and there is also a through hole 814 between the two horizontal movable parts 812. There is an adjustment gap 85 that allows the two horizontal movable parts 812 to rotate relative to each other. A step through hole 822 is set at the center of the dovetail slot slide 82. The aperture of the upper part of the step through hole 822 is smaller than the aperture of the lower part. The step through hole 822 is opposite to the bolt through hole 814 up and down. The dovetail slot slide 82 can be movably connected with the horse seat 84; after the two mounting seats 81 and the dovetail slot slide 82 are connected with the connecting bolts 83 and the pressing plate, there is a rotation gap between the pressing plate of the connecting bolts 83 and the top surfaces of the two horizontal mounting parts 812, so that the mounting seat 81 can move along the ring after being stressed. The shaped groove 821 rotates so that the corresponding connecting ends of the two guide rail sections connected by the connecting joint can move outward or inward, thereby fine-tuning the width L of the cloth; the shape of the adjustment gap 85 meets the following requirements: the inner and outer sides of the bolt through hole 814 are respectively provided with an adjustment gap inner section 852 and an adjustment gap outer section 851, and the adjustment gap inner section 852 and the adjustment gap outer section 851 are gradually reduced from the inner and outer sides to the middle, until they are respectively connected to the bolt through hole 814, so that the bolt through hole 814 becomes a part of the adjustment gap 85.

[0041] In this embodiment, the inner section 852 of the adjustment gap and the outer section 851 of the adjustment gap are formed by the spacing between the two horizontal movable parts 812. When two adjacent guide rail sections are in a front-to-back straight connection state, the inner section 852 of the adjustment gap and the outer section 851 of the adjustment gap are symmetrically arranged in a wedge shape, the spacing range at the narrowest part of the adjustment gap 85 is 2-3mm, and the angle range between the two side walls of the wedge-shaped inner section 852 of the adjustment gap and the angle range between the two side walls of the wedge-shaped outer section 851 of the adjustment gap are both 11-13°, so that the width L of the cloth can be fine-tuned. The arc of the circular arc boss 813 is greater than 90°, and the two ends of the circular arc boss 813 extend toward the side wall of the horizontal movable part 812 until the two end walls of the circular arc boss 813 are flush with the side wall of the corresponding horizontal movable part 812, so that the circular arc boss 813 can more stably support the mounting seat 81.

[0042] In this embodiment, a dovetail boss 823 with a front-to-back direction and a trapezoidal cross section is provided at the bottom of the dovetail slot slide 82. The length of the dovetail boss 823 is consistent with the front-to-back length of the dovetail slot slide 82. A dovetail slot 841 with a trapezoidal cross section that can be slidably connected to the dovetail boss is provided downwardly at the top of the horse seat 84. The front and rear ends of the dovetail slot 841 respectively penetrate the front and rear side walls of the horse seat 84, so that the dovetail slot slide 82 is slidably connected to the horse seat 84, limiting the lateral freedom of the horse seat 84, but not limiting the longitudinal freedom of the horse seat 84. In this way, when the guide rail sections in the drying room expand and contract due to temperature changes, the dovetail slot slide 82 and the horse seat 84 that are slidably connected provide the adjacent guide rail sections with room for expansion and contraction.

[0043] like Fig.14 , Fig.15As shown, a plurality of mutually parallel "I"-shaped shaping machine beams 9 are provided in the stenter heat setting machine, and a horse seat 84 is movably supported on the shaping machine beam 9 through rollers 846 arranged at intervals inside and outside, so that the weight of the guide rail is borne by the shaping machine beam 9. A split nut 843 is installed on one side of the horse seat 84, and the split nut 843 is fixedly sleeved on the transmission screw 845. An anti-dumping wheel 842 is respectively provided on the two side walls of the horse seat 84, and the anti-dumping wheel 842 is located below the top wall of the "I"-shaped shaping machine beam 9. A driving device for driving the transmission screw 845 to rotate is also provided. In actual installation work, the transmission screw 845 can be set on the shaping machine beam 9 through a mounting bracket, and the transmission screw 845 can be driven to rotate by a hand wheel or a motor. When it is necessary to fine-tune the width L of the cloth, the transmission screw 845 rotates, driving the split nut 843 to move, thereby driving the horse seat 84 connected to the split nut to move laterally on the crossbeam 9 of the shaping machine, and the connecting joint moves with the horse seat 84. The arc-shaped bosses 813 of the two mounting seats in the connecting joint move along the annular groove 821, driving the end of the previous guide rail section and the front end of the next guide rail section connected thereto to shift inward or outward. The maximum moving distance is until the horizontal movable parts 812 of the two mounting seats abut against each other, thereby fine-tuning the width L of the cloth.

[0044] The advantages of the present invention are: 1. The arc-shaped diameter-changing mechanism 7 fixed on the outer side of the first guide rail section 21 and the end guide rail section 41 includes: an inner convex arc section 73, an outer convex arc section 71, and an oblique straight transition section 72 located between the inner convex arc section and the outer convex arc section, and the oblique straight transition section 72 is inclined inward from the outer convex arc section 71 to the inner convex arc section 73. Through the arc-shaped diameter-changing at both ends and the oblique straight diameter-changing in the middle, a larger lateral diameter-changing distance can be completed in one guide rail section, and the chain drive can be carried out smoothly with less operating noise. The stenter heat setting machine with an extra-narrow oil-free steel plate guide having an arc-shaped diameter-changing mechanism 7 can retain the advantage that the cloth will not turn yellow, and when the width L of the cloth is determined, the width of the drying room of the stenter heat setting machine with an extra-narrow oil-free steel plate guide is smaller, and the energy consumption is lower than that of the stenter heat setting machine using traditional oil-free steel plate guides. 2. A further advantage of the present invention is that the length range of the arc-shaped diameter-changing mechanism is set at 900-1000 mm, which can ensure the installation space of the cylinder 65 for tensioning the chain 11 and the telescopic space of the telescopic rod, without hindering the tensioning of the chain 11. The curvature range of the outer convex arc segment 71 and the inner convex arc segment 73 are both set at 12-13°, and the front-to-back length of the oblique straight transition section 72 accounts for 34%-39% of the front-to-back length of the arc-shaped diameter-changing mechanism 7, which further enables the chain transmission to proceed smoothly and the noise of the chain 11 is very small when it is running. 3. A further advantage of the present invention is that the connecting joint arranged on the horse seat 84 includes: two front-to-back symmetrical "L"-shaped mounting seats 81, an arc-shaped boss 813 arranged at the bottom of the mounting seat 81 can extend into the annular groove 821 arranged at the top of the dovetail groove slide plate 82, the two mounting seats 81 and the dovetail groove slide plate 82 are connected by bolts 83, and the mounting seat 81 can rotate along the annular groove 821 after being subjected to force, so that the corresponding connecting ends of the two guide rail sections connected to the mounting seat 81 can be offset to the outside or inside, so that the width L of the cloth can be conveniently and efficiently fine-tuned under the premise of ensuring the connection strength.

Claims

1. Extra narrow oil-free steel plate guide rails, from front to back, include: A guide rail for the cloth-inlet section, a guide rail for the shaping section, and a guide rail for the cloth-outlet section; the front end of the guide rail for the cloth-inlet section can be connected to the front end mounting seat for mounting the driven sprocket; the rear end of the guide rail for the cloth-outlet section can be connected to the end mounting seat for mounting the driving sprocket; each two adjacent guide rail sections in the guide rail are connected by a connecting joint; it is characterized in that: the lateral spacing between the channel steels on the inner and outer sides of the front end of the guide rail for the cloth-inlet section and the lateral spacing between the channel steels on the inner and outer sides of the rear end of the guide rail for the cloth-outlet section are the same, and are both larger than the lateral spacing between the channel steels on the inner and outer sides of the guide rail sections in the shaping section guide rail, and each guide rail section in the shaping section guide rail is a front-to-back straight structure; a cylinder for tensioning the chain can be arranged between the channel steels on the inner and outer sides of the front end of the guide rail for the cloth-inlet section, and is located at the rear side of the cylinder, An arc-shaped diameter-changing mechanism is provided in a guide rail section of the cloth-inlet section guide rail in front of the drying room, and an arc-shaped diameter-changing mechanism is also provided in the cloth-outlet section guide rail. Through the transition of the two arc-shaped diameter-changing mechanisms, the rear end of the cloth-inlet section guide rail is straightly connected to the front end of the shaping section guide rail, and the front end of the cloth-outlet section guide rail is straightly connected to the rear end of the shaping section guide rail; the arc-shaped diameter-changing mechanisms are respectively fixedly arranged on the outer sides of the cloth-inlet section guide rail and the cloth-outlet section guide rail, and include: an inner convex arc section close to the connecting joint, an outer convex arc section away from the connecting joint, and an oblique straight transition section located between the inner convex arc section and the outer convex arc section for smoothly connecting the inner convex arc section and the outer convex arc section, and the oblique straight transition section is inclined inward from the direction of the outer convex arc section to the inner convex arc section; The front-to-back length of the arc-shaped reducer is in the range of 900-1000 mm, the curvature of the outer convex arc segment and the inner convex arc segment are both in the range of 12-13°, and the front-to-back length of the oblique straight transition section accounts for 34%-39% of the front-to-back length of the arc-shaped reducer.

2. The ultra-narrow oil-free steel plate guide rail according to claim 1, characterized in that: The front-to-rear lengths of the outer convex arc segment and the inner convex arc segment are the same, and the arcs of the outer convex arc segment and the inner convex arc segment are the same in curvature and radius.

3. The ultra-narrow oil-free steel plate guide rail according to claim 1, characterized in that: The arc-shaped diameter reducing mechanism and the inner channel steels on both sides thereof are fixed by welding; transverse connecting plates are respectively fixedly arranged between the outer convex arc section, the oblique straight transition section, the inner convex arc section and the relative outer channel steels.

4. The ultra-narrow oil-free steel plate guide rail according to claim 2, characterized in that: The outer convex arc segment, the oblique straight transition segment and the inner convex arc segment are fixed by welding to form an arc-shaped diameter-changing mechanism; the outer convex arc segment becomes the inner convex arc segment after being rotated.

5. The ultra-narrow oil-free steel plate guide rail according to claim 1, 2, 3 or 4, characterized in that: In every two adjacent guide rail sections, a vertically placed joint plate is fixedly arranged between the inner and outer channel steels at the end of the previous guide rail section, and a vertically placed joint plate is also fixedly arranged between the inner and outer channel steels at the front end of the next guide rail section, and the connecting joint is connected to the two connecting plates in the two adjacent guide rail sections; the connecting joint comprises: two "L"-shaped mounting seats that are symmetrical front and back, the inner and outer widths of the vertical connecting portion of each mounting seat are smaller than the lateral spacing between the inner and outer channel steels of the guide rail section, can extend into the lateral spacing between the inner and outer channel steels of the guide rail section, and can be fixedly connected to the corresponding joint plate, an arc-shaped boss is arranged at the bottom of the horizontal movable portion of each mounting seat, and the two arc-shaped bosses both extend into the annular grooves at the top of the dovetail slot slide plate below the two mounting seats, so that after the two horizontal movable portions are cooperated with each other and installed on the top of the dovetail slot slide plate, the centers of the two horizontal movable portions can reserve bolt through holes for the connecting bolts to pass through, and the two There is also an adjustment gap between the two horizontal movable parts so that the two horizontal movable parts can rotate relative to each other. A step through hole is arranged at the center of the dovetail slot slide plate. The aperture of the upper part of the step through hole is smaller than the aperture of the lower part. The step through hole and the bolt through hole are opposite to each other up and down, and the dovetail slot slide plate can be movably connected with the saddle; after the two mounting seats are connected to the dovetail slot slide plate with connecting bolts and a pressure plate, there is a rotation gap between the pressure plate of the connecting bolt and the top end surface of the two horizontal mounting parts, so that the mounting seat can rotate along the annular groove after being subjected to force, so that the corresponding connecting ends of the two guide rail sections connected by the connecting joint can be offset to the outside or inside, so as to fine-tune the width of the cloth; the shape of the adjustment gap meets the following requirements: an inner section of the adjustment gap and an outer section of the adjustment gap are respectively arranged on the inner and outer sides of the bolt through hole, and the inner section of the adjustment gap and the outer section of the adjustment gap are gradually reduced from the inner and outer sides to the middle, respectively, until they are respectively connected to the bolt through hole, so that the bolt through hole becomes a part of the adjustment gap.

6. The ultra-narrow oil-free steel plate guide rail according to claim 5, characterized in that: When two adjacent guide rail sections are in a front-to-back straight connection state, the inner section of the adjustment gap and the outer section of the adjustment gap are symmetrically set wedge shapes; the spacing range at the narrowest part of the adjustment gap is 2-3mm, and the angle range between the two side walls of the inner section of the adjustment gap and the two side walls of the outer section of the adjustment gap are both 11-13°.

7. The ultra-narrow oil-free steel plate guide rail according to claim 6, characterized in that: The arc angle of the arc-shaped boss is greater than 90°, and both ends of the arc-shaped boss extend toward the side wall of the horizontal movable portion until both end walls of the arc-shaped boss are flush with the corresponding side wall of the horizontal movable portion.

8. The ultra-narrow oil-free steel plate guide rail according to claim 5, characterized in that: A dovetail boss with a trapezoidal cross section and a front-to-rear direction is arranged at the bottom of the dovetail slot slide. The length of the dovetail boss is consistent with the length of the dovetail slot slide. A dovetail slot that can cooperate with the dovetail boss for sliding connection is opened downward at the top of the horse seat, so that the dovetail slot slide is slidably connected to the horse seat.

9. The ultra-narrow oil-free steel plate guide rail according to claim 8, characterized in that: The horse seat is movably supported on the crossbeam of the setting machine by rollers arranged at intervals inside and outside. A split nut is installed on one side of the horse seat, and the split nut is sleeved on a transmission screw. A driving device for driving the transmission screw to rotate is also provided. When the width of the cloth needs to be fine-tuned, the transmission screw rotates to drive the split nut to move, thereby driving the horse seat connected to the split nut to move horizontally on the crossbeam of the setting machine, and the connecting joint moves with the horse seat. The arc-shaped bosses of the two mounting seats in the connecting joint move along the annular groove, driving the end of the previous guide rail section and the front end of the next guide rail section connected thereto to deviate inward or outward, and the maximum distance is until the horizontal movable parts of the two mounting seats abut against each other, thereby fine-tuning the width of the cloth.

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