A rigid louver capable of automatically adjusting the wire-to-wire clearance

Abstract

The utility model discloses a rigid louver that can flexibly and automatically adjust silk passing gap relates to the technical field of carbon fiber pre-oxidation process. In the utility model, all rigid windproof curtains that constitute rigid louver are in the driving and transmission effect of pneumatic cylinder and parallelogram transmission assembly under the rotation center of corresponding drive side pivot, and carry out integral rotation and integral opening and closing simultaneously and synchronously, realize the integral opening and closing of rigid louver, realize the flexible and automatic adjustment of rigid louver opening and closing gap, thereby reach the purpose that silk passing gap is flexibly and automatically adjusted, save the operation of manual adaptation silk passing gap, greatly accelerate carbon fiber pre-oxidation process, improve carbon fiber production efficiency, reduce maintenance time, reduce repair cost, can satisfy different production demand and process change requirement, have high degree of mechanization, high efficiency, low cost, simplify operation, convenient to use, wide application range, strong universality's advantage.

Description

Technical Field

[0001] This utility model relates to the technical field of carbon fiber pre-oxidation process, specifically a rigid louver that can flexibly and automatically adjust the gap between the fibers. Background Technology

[0002] The pre-oxidation process of carbon fiber is the most time-consuming and energy-intensive process in carbon fiber production because it places high demands on the temperature inside the oxidation furnace—maintaining a high temperature of 200–300°C and being sensitive to temperature gradients within the temperature field. Therefore, appropriate sealing measures are needed to prevent hot air leakage and heat loss. Rigid louvers are typically installed at the fiber inlet and outlet ends of the oxidation furnace to achieve this sealing. The gaps between the air curtains of the rigid louvers allow for both sealing and fiber passage, and they can also withstand high-temperature operating environments. However, traditional industrial rigid louvers are mostly fixed air curtain structures. Once the gaps are determined, they are difficult to change, limiting their applicability, versatility, and flexibility in use compared to different production needs and process variations. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing a rigid louver with flexible and automatic adjustment of the wire guide gap. This invention enables the overall opening and closing of the rigid louver and allows for flexible and automatic adjustment of the opening and closing gap, thereby achieving the goal of flexibly and automatically adjusting the wire guide gap. This eliminates the need for manual adjustment of the wire guide gap, significantly accelerates the carbon fiber pre-oxidation process, improves carbon fiber production efficiency, reduces maintenance time, and lowers repair costs. It can meet different production needs and process variations, and has the advantages of high mechanization, high efficiency, low cost, simplified operation, ease of use, wide applicability, and strong versatility.

[0004] The objective of this utility model can be achieved through the following technical solutions: This utility model discloses a rigid louver with flexible and automatic adjustment of the wire gap, comprising a cylinder with a connecting seat at the upper end and a cylinder connector at the lower end (the cylinder is fixedly connected to the oxidation furnace via the connecting seat, and the cylinder is hinged to the connecting rod via the cylinder connector), a connecting rod hinged to the cylinder connector and always in the vertical direction (in this utility model, each pair of adjacent rotating arms, the interval between each pair of adjacent positioning pin holes in the connecting rod, and the center distance between each pair of adjacent rigid windbreaks form a parallelogram structure, and the transmission component maintains the overall rotation and deformation in a parallelogram structure at all times; the center distance between each pair of adjacent rigid windbreaks is also the distance between the upper and lower adjacent drive-side rotating shafts). A vertical column with a fixed position and constant spacing means that the interval between every two adjacent locating pin holes on the connecting rod on opposite sides must always be vertical. This means that the connecting rod must always be vertical during the overall rotation and deformation of the parallelogram transmission assembly. Several identical rotating arms, hinged at equal intervals to the connecting rod and always parallel to each other, change the height of the connecting rod as the cylinder extends and retracts. In all parallelogram transmission assemblies, when the vertical connecting rod changes height during translation, it will inevitably cause all the rotating arms, which form another set of parallel sides, to simultaneously and synchronously rotate and deform, thereby driving all the drive-side shafts. The rigid windbreak curtains rotate and open / close synchronously as a whole, achieving the overall opening and closing of the rigid louvers and flexibly adjusting the opening and closing gap of the rigid louvers, thereby achieving the purpose of flexibly and automatically adjusting the wire passage gap. Several rigid windbreak curtains (the rigid louvers are composed of vertically parallel rigid windbreak curtains; driven by cylinders and a parallelogram transmission assembly, all rigid windbreak curtains can simultaneously and synchronously rotate and open / close as a whole, achieving the overall opening and closing of the rigid louvers and flexibly and automatically adjusting the opening and closing gap of the rigid louvers, thereby achieving the purpose of flexibly and automatically adjusting the wire passage gap) are fixed to the furnace by connecting blocks. Each rigid windbreak curtain has a drive-side rotating shaft and a passive-side rotating shaft arranged coaxially at both ends, passing through the corresponding positioning sleeves (on the one hand, the drive-side rotating shaft and the passive-side rotating shaft jointly support both ends of the rigid windbreak curtain; on the other hand, when the drive-side rotating shaft rotates, it drives the rigid windbreak curtain and the passive-side rotating shaft to rotate synchronously); wherein, the other end of the drive-side rotating shaft passes through the positioning sleeve and is fixedly connected to the other end of the rotating arm through an expansion sleeve (ensuring that the drive-side rotating shaft can rotate synchronously with the rotating arm); the positioning sleeve is horizontally inserted into the furnace body thickness between the inner wall and the outer wall of the furnace body on the corresponding side and extends outward (the positioning sleeve is used to support the drive-side rotating shaft and the passive-side rotating shaft, and the drive-side rotating shaft and the passive-side rotating shaft can rotate inside the positioning sleeve);A series of locating pin holes of equal spacing and size are vertically formed along the centerline of the connecting rod. The distance between two adjacent locating pin holes and the distance between two adjacent rigid windbreaks are both equal to the width of the rigid windbreaks. (This ensures that the quadrilateral formed by the two adjacent rotating arms, the interval between two adjacent locating pin holes in the connecting rod, and the center distance between two adjacent rigid windbreaks is a parallelogram—because the lengths of the two pairs of opposite sides in the quadrilateral are equal.) This also allows the invention to maintain its parallelogram structure for overall rotation and deformation—that is, under the drive of the cylinder, the connecting rod is always moved vertically. During the translation process, the height changes, which in turn cause the same rotating arm to rotate synchronously at the same angle. This, in turn, causes the drive-side rotating shaft, which is fixed to the rotating arm, to rotate synchronously at the same angle. The drive-side rotating shaft, in turn, causes the rigid windshield curtains to rotate synchronously at the same angle. In this way, this invention can use the two vertically fixed drive-side rotating shafts and driven-side rotating shafts as the rotation center, and under the drive of the cylinder, achieve the overall rotation and overall deformation of several sets of parallelogram transmission components to realize the overall rotation and overall opening and closing of all rigid windshield curtains. This allows the gap between all adjacent rigid windshield curtains to change synchronously, thereby achieving the purpose of flexibly and automatically adjusting the wire feed gap.

[0005] In this invention, the connecting seat and the cylinder, the cylinder connector and the connecting rod, and the connecting rod and the rotating arm are all connected by pins (to achieve quick connection and facilitate relative rotation between the connected parts); the cylinder connector and the cylinder's telescopic rod are connected by threads (to achieve quick connection between the cylinder connector and the cylinder's telescopic rod).

[0006] In this utility model, a limit switch is installed next to the cylinder telescopic rod near the rigid wind deflector to limit the direction of the cylinder swing arm (the limit switch ensures that all cylinders swing outward, and ensures that all rotating arms, drive-side rotating shafts and rigid wind deflectors rotate in the same direction, and ensures that this utility model opens and closes synchronously with several identical parallelogram structures).

[0007] The design principle of this utility model is as follows: In this invention, all the rigid windbreaks constituting the rigid louver rotate and open and close simultaneously and synchronously around the rotation center of the corresponding drive-side rotating shaft, driven by the cylinder and the transmission action of the parallelogram transmission assembly. This achieves the overall opening and closing of the rigid louver and enables flexible and automatic adjustment of the opening and closing gap, thereby achieving the purpose of flexible and automatic adjustment of the wire guide gap. This eliminates the need for manual adjustment of the wire guide gap, greatly accelerates the carbon fiber pre-oxidation process, improves carbon fiber production efficiency, reduces maintenance time, and lowers maintenance costs. It can meet different production needs and process change requirements, and has the advantages of high mechanization, high efficiency, low cost, simplified operation, convenient use, wide applicability, and strong versatility.

[0008] More specifically, the parallelogram transmission assembly designed in this utility model is formed by the interval between every two adjacent rotating arms, the interval between every two adjacent locating pin holes in the connecting rod, and the center distance between every two adjacent rigid windbreaks. This creates several transmission assemblies with parallelogram-shaped structures that maintain their overall rotation and deformation in a parallelogram-shaped structure at all times. Furthermore, the center distance between every two adjacent rigid windbreaks is the same as the distance between two adjacent drive-side rotating shafts, forming a fixed-position, unchanging vertical column. Therefore, the interval between every two adjacent locating pin holes on the connecting rod located on opposite sides must always be vertical. In other words, during the overall rotation and deformation of the parallelogram transmission assembly, the connecting rod must also always remain vertical. In this way, as the cylinder extends and retracts, the connecting rod, which always remains vertical, undergoes a change in height during translation. Simultaneously, it inevitably causes all the rotating arms, which are the other set of parallel sides, to rotate and deform synchronously as a whole. This, in turn, causes all the drive-side rotating shafts and rigid windshields to rotate and open and close synchronously as a whole. That is, all the rigid windshields rotate and open and close synchronously as a whole, with the corresponding drive-side rotating shaft as the rotation center, under the drive of the cylinder and the transmission action of the parallelogram transmission assembly, realizing the overall opening and closing of the rigid louvers and achieving flexible and automatic adjustment of the opening and closing gap of the rigid louvers.

[0009] The beneficial technical effects of this utility model are as follows: This invention enables the overall opening and closing of rigid louvers and allows for flexible and automatic adjustment of the opening and closing gap. This achieves the purpose of flexibly and automatically adjusting the wire guide gap, eliminating the need for manual adjustment of the wire guide gap, greatly accelerating the carbon fiber pre-oxidation process, improving carbon fiber production efficiency, reducing maintenance time, and lowering repair costs. It can meet different production needs and process changes, and has the advantages of high mechanization, high efficiency, low cost, simplified operation, ease of use, wide applicability, and strong versatility. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the installation position of this utility model.

[0012] Figure 3 This is a schematic diagram of the initial state of this utility model when it is not in operation.

[0013] Figure 4 This is a schematic diagram of the working state of this utility model when the automatic air curtain passes through the wire gap.

[0014] The numbers in the diagram are explained as follows: 1. Rigid windbreak curtain, 2. Connecting seat, 3. Cylinder, 3-1. Telescopic rod, 4. Cylinder connector, 5. Connecting rod, 6. Rotating arm, 7. Positioning sleeve, 8. Drive side rotating shaft, 9. Passive side rotating shaft, 10. Oxidation furnace, 11. Outer wall of furnace body, 12. Inner wall of furnace body, 13. Expansion sleeve, 14. Limit switch, 15. Connecting block, f. Wire passage gap. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-4As shown, this utility model discloses a rigid louver that can flexibly and automatically adjust the wire gap, comprising a cylinder 3 with a connecting seat 2 at the upper end and a cylinder connector 4 at the lower end (the cylinder 3 is fixedly connected to the oxidation furnace 10 through the connecting seat 2, and the cylinder 3 is hinged to the connecting rod 5 through the cylinder connector 4), a transmission component that is hinged to the cylinder connector 4 and always in the vertical direction (in this utility model, each pair of adjacent rotating arms 6, the interval between each pair of adjacent positioning pin holes in the connecting rod 5, and the center distance between each pair of adjacent rigid windbreak curtains 1 form a parallelogram structure, and always maintains the overall rotation and overall deformation in the parallelogram structure, plus each pair of adjacent rigid windbreak curtains 1) The center spacing segment of 1 is the spacing segment between two adjacent drive-side rotating shafts 8. This is a vertical column with a fixed position and constant spacing. Therefore, the interval between every two adjacent positioning pin holes on the connecting rod 5 located on the opposite side must always be in a vertical state. That is, during the overall rotation and deformation of the parallelogram transmission assembly, the connecting rod 5 must always be in a vertical state. Several identical rotating arms 6 are hinged to the connecting rod 5 at equal intervals at one end and always remain parallel to each other. (As the cylinder 3 extends and retracts, the height position of the connecting rod 5 changes. In all parallelogram transmission assemblies, when the height position of the connecting rod 5, which is always in a vertical state, changes during translation, it will inevitably drive the rotating rod 6.) All rotating arms 6 on another set of parallel sides rotate and deform simultaneously, thereby driving all drive-side rotating shafts 8 and rigid windbreak curtains 1 to rotate and open and close simultaneously, realizing the overall opening and closing of the rigid louvers and flexibly adjusting the opening and closing gap of the rigid louvers, thus achieving the purpose of flexibly and automatically adjusting the wire gap. Several rigid windbreak curtains 1 are arranged vertically and horizontally in the inner cavity of the oxidation furnace 10 and can rotate around their respective axes to seal the louvers. (The rigid louvers are composed of vertically and horizontally arranged rigid windbreak curtains 1. Under the drive of the cylinder 3 and the transmission of the parallelogram transmission assembly, all rigid windbreak curtains 1 can rotate and open and close simultaneously, realizing the rigid...) The overall opening and closing of the louvers enables flexible and automatic adjustment of the opening and closing gap of the rigid louvers, thereby achieving the purpose of flexible and automatic adjustment of the thread gap. The drive-side rotating shaft 8 and the passive-side rotating shaft 9 are respectively fixed to both ends of each rigid windbreak curtain 1 by connecting blocks 15, and both pass through the positioning sleeves 7 on the corresponding sides and are arranged coaxially. (On the one hand, the drive-side rotating shaft 8 and the passive-side rotating shaft 9 jointly support both ends of the rigid windbreak curtain 1; on the other hand, when the drive-side rotating shaft 8 rotates, it drives the rigid windbreak curtain 1 and the passive-side rotating shaft 9 to rotate synchronously). The other end of the drive-side rotating shaft 8 passes through the positioning sleeve 7 and is fixed to the other end of the rotating arm 6 by the expansion sleeve 13 (to ensure that the drive-side rotating shaft 8 can rotate synchronously with the rotating arm 6).The positioning sleeve 7 is horizontally inserted into the furnace body thickness between the inner wall 12 and the outer wall 11 of the furnace body on the corresponding side and extends outward (the positioning sleeve 7 is used to support the drive-side rotating shaft 8 and the passive-side rotating shaft 9, and the drive-side rotating shaft 8 and the passive-side rotating shaft 9 can rotate inside the positioning sleeve 7); positioning pin holes with the same spacing and size are opened vertically downward along the center line of the connecting rod 5, and the distance between two adjacent positioning pin holes and the distance between two adjacent rigid windbreak curtains 1 are both equal to the width of the rigid windbreak curtain 1 (thus, the quadrilateral formed by the two adjacent rotating arms 6, the interval between two adjacent positioning pin holes in the connecting rod 5, and the center distance between two adjacent rigid windbreak curtains 1 must be a parallelogram - because the lengths of the two pairs of opposite sides in the quadrilateral are equal. At the same time, it can also ensure that this utility model always maintains the parallelogram structure). The structure undergoes overall rotation and deformation—that is, under the drive of cylinder 3, the connecting rod 5 is always moved vertically. During this translation, the height of the connecting rod 5 changes, which in turn drives the rotating arm 6 to rotate synchronously at the same angle. This, in turn, drives the drive-side rotating shaft 8, which is fixed to the rotating arm 6, to rotate synchronously at the same angle. The drive-side rotating shaft 8 then drives the rigid windshield curtain 1 to rotate synchronously at the same angle. Thus, this invention uses the two vertically fixed drive-side rotating shafts 8 and passive-side rotating shafts 9 as rotation centers. Driven by cylinder 3, it achieves the overall rotation and opening / closing of all rigid windshield curtains 1 through the overall rotation and deformation of several sets of parallelogram transmission components. This allows for the synchronous change of the gap between all adjacent rigid windshield curtains 1, thereby achieving flexible and automatic adjustment of the thread gap.

[0016] In this utility model, the connecting seat 2 and the cylinder 3, the cylinder connector 4 and the connecting rod 5, and the connecting rod 5 and the rotating arm 6 are all connected by pins (to achieve quick connection and facilitate relative rotation between the connected parts); the cylinder connector 4 and the telescopic rod 3-1 of the cylinder 3 are connected by threads (to achieve quick connection between the cylinder connector 4 and the telescopic rod 3-1 of the cylinder 3).

[0017] In this utility model, a limit switch 14 is installed next to the cylinder telescopic rod 3-1 near the rigid windbreak curtain 1 to limit the direction of the cylinder 3 swing arm (the limit switch 14 ensures that all cylinders 3 swing outward, and ensures that all rotating arms 6, drive-side rotating shaft 8 and rigid windbreak curtain 1 rotate in the same direction, and ensures that this utility model opens and closes synchronously with several identical parallelogram structures).

[0018] The specific usage of this utility model is as follows: Before using this utility model, it is necessary to assemble it according to the above structural description and the positional relationship shown in the attached drawings. Then, the corresponding number of this utility model are installed in the corresponding positions of the wire inlet and wire outlet in the oxidation furnace 10 to seal the temperature field for heat preservation, and the wire bundle passes through the gap between the upper and lower adjacent rigid windbreak curtains 1 in the rigid louvers.

[0019] Once the above preparations are completed, this utility model can be put into normal use: like Figure 3 As shown, in the initial state, the telescopic rod 3-1 of the cylinder 3 is in an extended state, and the rigid windbreak curtain 1 is in a nearly vertical arrangement state—that is, the minimum gap between the rigid windbreak curtains 1 can be zero when the gap is less than the minimum gap between the wire bundles, and the angle between the rotating arm 6 and the connecting rod 5 is also in a small angle state. That is, in this utility model, a transmission component with a parallelogram structure is formed by each pair of adjacent rotating arms 6, the interval between each pair of adjacent positioning pin holes in the connecting rod 5, and the center distance between each pair of adjacent rigid windbreak curtains 1. In this initial state, all the drive-side rotating shafts 8 are a vertical column with fixed positions and constant spacing, and the interval between each pair of adjacent positioning pin holes on the opposite side of the connecting rod 5 is always in a vertical state. At this time, the angle between the rotating arm 6 and the connecting rod 5 is small, and all the parallelogram transmission components are in the same initial state.

[0020] When the initial gap of the air curtain is too small to meet the production process requirements, this utility model can flexibly and automatically adjust the opening and closing gap of the rigid louver—that is, the telescopic rod 3-1 of the cylinder 3 retracts, and at the same time, under the resistance of the limit switch 14, the cylinder 3 rotates to the left along the hinge center of the connecting seat 2, driving the connecting rod 5 to move horizontally to the upper left, and the connecting rod 5 always remains vertical. When the vertical connecting rod 5 changes its height during the horizontal movement, it will inevitably drive all the rotating arms 6 of the other set of parallel sides in the parallelogram transmission assembly to rotate and deform as a whole, thereby driving all the drive-side rotating shafts 8 and the rigid air curtain 1 to rotate and open and close as a whole, realizing the overall opening and closing of the rigid louver, realizing the flexible adjustment of the opening and closing gap of the rigid louver, and thus achieving the purpose of flexibly and automatically adjusting the thread gap. Figure 4 As shown, when the wire passage gap f matches the wire bundle, the cylinder 3 stops retracting, the parallelogram transmission component stops rotating and deforming, and the opening and closing gap of the rigid louver is fixed and no longer changes, that is, the wire passage gap f is stable and no longer changes, and normal wire passage and pre-oxidation can be performed.

Claims

1. A rigid louver capable of flexibly and automatically adjusting the wire gap, characterized in that: The rigid louver includes a cylinder (3) with a connecting seat (2) at the upper end and a cylinder connector (4) at the lower end; a connecting rod (5) hinged to the cylinder connector (4) and always in the vertical direction; several identical rotating arms (6) hinged at equal intervals to the connecting rod (5) and always parallel to each other; and several rigid windbreak curtains (1) arranged parallel to each other in the inner cavity of the oxidation furnace (10) and capable of rotating around their respective axes to seal the louver. Each rigid windbreak curtain (1) is fixed to both ends of each rigid windbreak curtain (1) by connecting blocks (15) and is located from the corresponding side positioning sleeves (7). A drive-side rotating shaft (8) and a passive-side rotating shaft (9) are arranged in a coaxial manner; wherein, the other end of the drive-side rotating shaft (8) passes through the positioning sleeve (7) and is fixedly connected to the other end of the rotating arm (6) through the expansion sleeve (13); the positioning sleeve (7) is horizontally inserted into the furnace body thickness between the inner wall (12) and the outer wall (11) of the furnace body on the corresponding side and extends outward; positioning pin holes with the same spacing and equal size are opened vertically downward along the center line of the connecting rod (5), and the distance between two adjacent positioning pin holes and the distance between two adjacent rigid windbreak curtains (1) are equal to the width of the rigid windbreak curtain (1).

2. A rigid louver with flexible and automatic adjustment of the wire gap according to claim 1, characterized in that: The connecting seat (2) is connected to the cylinder (3), the cylinder connector (4) is connected to the connecting rod (5), and the connecting rod (5) is connected to the rotating arm (6) by a pin; the cylinder connector (4) is connected to the telescopic rod (3-1) of the cylinder (3) by a thread.

3. A rigid louver with flexible and automatic adjustment of the wire gap according to claim 1, characterized in that: A limit switch (14) is installed next to the telescopic rod (3-1) of the cylinder (3) on the side near the rigid windshield (1) to limit the direction of the cylinder (3) swing arm.

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