CN216139618U - Layered conveyor belt forming device capable of realizing interlayer constant tension - Google Patents
Layered conveyor belt forming device capable of realizing interlayer constant tension Download PDFInfo
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- CN216139618U CN216139618U CN202023306169.XU CN202023306169U CN216139618U CN 216139618 U CN216139618 U CN 216139618U CN 202023306169 U CN202023306169 U CN 202023306169U CN 216139618 U CN216139618 U CN 216139618U
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Abstract
The utility model discloses a layered conveyor belt forming device for realizing interlayer constant tension, which comprises a traction compaction roller and at least two constant tension devices, wherein all the constant tension devices are used for outputting constant-tension rubberized fabric and sending the rubberized fabric into the traction compaction roller layer by layer to form a layered conveyor belt. The layered type conveying belt forming device for realizing interlayer constant tension optimally sets the tension of each layer in the forming process to form better tension difference, thereby forming the actual length difference of the adhesive tapes and achieving the purpose of prolonging the service life.
Description
Technical Field
The utility model belongs to the technical field of a preparation process of a conveying belt, and particularly relates to a layered conveying belt forming device for realizing interlayer constant tension.
Background
The conveyer belt is suitable for the transportation of powdery and blocky materials among various working procedures and working sections, is convenient and quick, has high production efficiency, and is a necessary means for continuously conveying the mass materials in modern mass production. The layered conveyer belt is one of important varieties in all conveyer belts, and has the earliest application, the most mature technology and the widest application range.
The framework materials used by the layered conveyer belt are of the following varieties:
CC56 canvas: blending polyester staple fibers and cotton into yarns, and then plying the yarns and polyester filaments into warps; the pure blended yarn is folded into weft. Interweaving into canvas with a single-layer loom. The single-layer strength is 55-80N/mm;
cotton canvas: the material is nylon 6 filament yarn, which is twisted according to the strength grade and then interwoven into canvas by a single-layer loom. The single-layer strength is 80-400N/mm;
polyester canvas (also known as EP canvas): the polyester filament yarns are plied to form warp yarns, the nylon 66 filament yarns are plied to form weft yarns, and the warp yarns and the weft yarns are interwoven into the canvas by a single-layer weaving machine. The single layer strength was varied from 125 to 630N/mm.
The layered conveyer belt has the following characteristics:
1) the variation range is large;
2) the supply period is short;
3) the belt body is soft, and a smaller transmission roller can be used under the condition of limited working conditions without influencing the conveying of materials;
4) the application range is wide, and the product can be combined with different sizing materials to form products with different purposes.
Because of these advantages, the layered conveyor belt has taken up a large market share and has shown great vitality, despite the continuous renewal of the conveyor belt.
As shown in fig. 1, the layered conveyor belt is produced by dipping canvas, rolling and hanging adhesive tape by three or four rollers, stacking the canvas layer by layer on a tape forming machine to form a skeleton layer 10 with a certain thickness and strength, then attaching a working surface coating adhesive 20 to any one surface of the skeleton layer 10, attaching a non-working surface coating adhesive 30 to the other surface, forming an edge adhesive 40 on the side, and vulcanizing the canvas under certain conditions of temperature, pressure, time and the like to form a finished product.
It is generally believed that: when the strength of one layer of canvas is 200N/mm, the strength of 5 layers of canvas after being stacked is 1000N/mm, but in the actual production process, the strength is often far less than 1000N/mm, and some canvas has only 85 percent of the theoretical number. Therefore, although the strength of the multi-layer stacked structure is improved from a static angle, the multi-layer stacked structure often cannot achieve a good use effect in an actual use process, and the service life is shortened.
The majority of conveyor belt production is flat (as shown in fig. 2), and the adhesive tape 50 passes through the driving roller 60 and the driven roller 70 to be connected into a ring to convey the material 80 (as shown in fig. 3).
Because the conveyer belt continuously runs by holding the roller (as shown in figure 4), the length difference between the inner ring and the outer ring of the framework layer is formed inevitably, and the length difference between the canvas of the outer ring and the canvas of the inner ring of the framework layer reaches about 2 percent under the condition of not considering the thickness of a non-working surface.
Outer ring arc AB ═ 2(R + d) pi/2 ═ (R + d) pi
Inner circle arc AB ═ 2R π/2 ═ R π
The difference ratio of the inner and outer ring arc lengths is (outer ring arc AB-inner ring arc AB)/inner ring arc AB
＝[(R+d)π-Rπ]/Rπ
＝d/R
Taking EP200 rubberized fabric as an example, 6 layers are stacked to form a framework layer, the total thickness of the framework layer is about 7.2mm, and the radius of the roller is 400mm
The difference ratio of the arc length of the inner and outer rings is 7.2/400
＝1.8％
Due to the existence and unavoidable ratio of the arc length, the outer layer of the framework is stretched 2 times and the inner layer of the framework is compressed 2 times (one for each of the driving roller and the driven roller) for each rotation of the conveyer belt.
The strength and the comprehensive performance of the framework layer are suddenly reduced due to long-term high-frequency tensile fatigue and compression corrugation, so that the adhesive tape cannot bear corresponding load, the carrying capacity is greatly reduced, and the service life is seriously shortened.
The above example is a more standard example, and even a smaller transmission roller is used, so that the arc length difference ratio of the inner ring and the outer ring is larger, and the service life is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a layered conveyor belt forming device for realizing interlayer constant tension, which optimizes the tension of each layer in the forming process to form better tension difference, thereby forming the actual length difference of adhesive tapes and achieving the purpose of prolonging the service life.
In order to achieve the above purpose, the solution of the utility model is:
a layered conveyer belt forming device for realizing interlayer constant tension comprises a traction compaction roller and at least two constant tension devices, wherein all the constant tension devices are used for outputting constant-tension rubberized fabrics and sending the rubberized fabrics into the traction compaction roller according to layers to form a layered conveyer belt.
The constant tension device comprises a frequency modulation motor, a friction disc, two tension fixing rollers, a tension movable roller and a tension sensor, wherein the friction disc is connected with the output end of the frequency modulation motor, the frequency modulation motor is used for driving the friction disc to rotate, and a rubberized fabric roll is linked with the friction disc and rotates along with the friction disc; the input end of one tension fixing roller corresponds to the output end of the adhesive tape roll and is used for conveying the adhesive tape led out by the adhesive tape roll driven by the friction disc along the tension fixing roller; a tension movable roller is arranged below the tension fixed roller and on the other side of the friction disc and is used for bearing the adhesive tape led out by the tension fixed roller; the other tension fixing roller and the tension fixing roller are arranged on the same horizontal position, and the two tension fixing rollers are positioned on two sides of the tension movable roller; the tension sensor is arranged on the tension movable roller and used for sensing the tension of the adhesive tape and sending the tension to the tension controller, and the tension controller adjusts the output frequency of the frequency modulation motor so as to adjust the rotating speed of the friction disc.
The forming device also comprises a second traction compaction roller and a plurality of second constant tension devices, wherein the framework output by the traction compaction roller outputs the adhesive tapes with constant tension through one second constant tension device, and the adhesive tapes output by the other second constant tension devices are sent into the second traction compaction roller according to layers to form the layered conveying belt.
After the scheme is adopted, the improvement point of the utility model is as follows:
(1) by setting an interlayer tension difference for the framework layer of the layered conveyer belt, the formed framework layer is more resistant to deflection and longer in service life;
(2) the tension between the layers is the maximum close to the non-working surface and gradually reduced in sequence, and the working surface covering glue is arranged on the outermost layer which is also the layer with the minimum tension.
Compared with the prior art, the adhesive tape has the advantages that the adhesive tape is more resistant to deflection by arranging the tension difference between the skeleton layers of the layered type conveying belt, and the service life of the skeleton layers is prolonged by more than 25% compared with the adhesive tape with the same type and the same specification.
Drawings
FIG. 1 is a schematic view of a production process of a conventional layered conveyor belt;
FIG. 2 is a schematic view of a flat conveyor belt;
FIG. 3 is a schematic diagram of a flat conveyor belt;
FIG. 4 is a schematic diagram of the dimensions of the conveyor belt and the adhesive tape;
FIG. 5 is a schematic structural view of a layered conveyor belt;
FIG. 6 is a schematic diagram of the present invention for making a layered conveyor belt;
FIG. 7 is a schematic view of the construction of the constant tension device of the present invention;
fig. 8 is another angle structure diagram of the constant tension device of the present invention.
Detailed Description
The technical solution and the advantages of the present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, the utility model provides a layered conveyor belt forming device for realizing interlayer constant tension, which comprises a traction compaction roller 2 and at least two constant tension devices, wherein all the constant tension devices are used for outputting constant-tension rubberized fabric, and the rubberized fabric is fed into the traction compaction roller 2 layer by layer after being calendered and rubberized, so that the layered conveyor belt is formed.
As shown in fig. 7 and 8, the constant tension device comprises a frequency modulation motor 1, a friction disc 2, two tension fixing rollers 4, a tension movable roller 5 and a tension sensor 6, wherein the friction disc 2 is connected with an output end of the frequency modulation motor 1, the frequency modulation motor 1 is used for driving the friction disc 2 to rotate, and the adhesive tape roll 3 is linked with the friction disc 2 and rotates along with the friction disc 2; the input end of one tension fixing roller 3 corresponds to the output end of the adhesive tape roll 3 in position and is used for conveying the adhesive tape 7 led out from the adhesive tape roll 3 by the friction disc 2 along the tension fixing roller 4; a tension movable roller 5 is arranged below the tension fixed roller 4 and on the other side of the friction disc 2 and is used for bearing an adhesive tape 7 led out from the tension fixed roller 4; the other tension fixing roller 4 is arranged at the same horizontal position with the tension fixing roller 4, and the two tension fixing rollers 4 are positioned at two sides of the tension movable roller 5; the tension sensor 6 is arranged on the tension movable roller 5 and used for sensing the tension of the adhesive tape 7 and sending the tension to the tension controller, the output frequency of the frequency modulation motor 1 is adjusted by the tension controller, the rotating speed of the friction disc 2 is adjusted, the cloth releasing speed is adjusted, and the final layered conveying belt achieves constant tension.
When the device works, square steel is strung in the center of a rubberized fabric roll 3, the rubberized fabric roll 3 is connected with a frequency modulation motor 1 through a friction disc 2, and the rubberized fabric roll 3 is opened, so that the rubberized fabric 7 passes through a tension fixing roller 4 and a tension movable roller 5; when the rubberized fabric needs tension, the tension controller is input, the tolerance range (smaller, generally within +/-100N) of the rubberized fabric is set, and when the tension reaches the upper limit, the tension controller outputs an instruction, so that the frequency of the frequency modulation motor is slightly adjusted upwards, and the fabric releasing speed is accelerated; when the tension reaches the lower limit, the tension controller outputs an instruction to slightly reduce the frequency of the frequency modulation motor and slow down the cloth releasing speed; the purpose of constant tension is achieved through the self-adjustment.
Based on the control scheme of the tension controller realized by the utility model, the analysis can find that the adhesive plaster is shorter when the tension is larger under the condition that the adhesive plaster has the same width and model. Conversely, the lower the tension, the longer the tape. In accordance with the foregoing analysis, the layer of adhesive fabric adjacent to the non-working side of the roll 500 (inner carcass layer 400) should be the shortest and the layer of adhesive fabric adjacent to the material handling working side of the adhesive fabric 100 (outer carcass layer 200) should be the longest. In accordance with the principles described above, the layer of adhesive adjacent the non-working face overlay adhesive 300 exerts the greatest tension, whereas the layer of adhesive adjacent the working face overlay adhesive 100 exerts the least tension. The intermediate layers of tape are progressively reduced in accordance with the principles described above (as shown in figure 5).
When the laminated conveyor belt frame layer is actually formed, a constant tension device is used for tension forming, and the laminated conveyor belt frame layer is produced in a flat plate type, due to the limitation of equipment and the uncertainty of the layer number, at most 4 layers are formed at one time (as shown in figure 6), and if the number of the layers exceeds 4 layers, secondary or multiple forming is required.
Stretching is carried out by a constant tension device according to a preset tension value, and the tensile force is F1 & gtF 2 & gtF 3 & gtF 4, so that the corresponding adhesive tapes have the lengths of 1 adhesive tape, 2 adhesive tape, 3 adhesive tape and 4 adhesive tape.
Wherein: f2 ═ F1+ F
F3＝F1+2f
F4＝F1+3f
Wherein F1 and F are determined according to the type, specification and supplier of the adhesive tape.
During the forming process of the framework layers, the tension of each layer is constant, and the layers are rolled and compacted by a traction compacting roller to form a whole and are marked correspondingly (particularly, the first layer is marked).
When more than 4 layers are required, the method is generally carried out by secondary forming, the method is similar to the primary forming, only a part of the framework which is formed in one step is used as a first layer of the secondary forming, and the tension required by the part of the framework in the secondary forming is approximately equal to the sum of the tensions of all layers in the primary forming (the specific numerical value is determined by the test of a technical department).
The first layer has the highest tension and consumes the shortest tape, and according to the previous analysis, the non-working surface next to the shortest tape; the tension is minimum, the consumed adhesive plaster is the longest, and the associated working surface is supposed to be.
With reference to fig. 6, adhesive fabric rolls a1, a2, A3 and a4 are hung according to the forming requirement, tension F1, F2, F3 and F4 are provided for the adhesive fabric output by each adhesive fabric roll based on the constant tension device in fig. 7 and 8, continuous forming is carried out under the action of a traction compaction roller 8, wherein F1 is more than F2 is more than F3 is more than F4,
and making F2 ═ F1+ F
F3＝F1+2f
F4＝F1+3f
And after the framework layer is formed, the non-working surface covering glue is pasted on one surface of the adhesive tape corresponding to the F1, and the working surface covering glue is pasted on the other surface of the adhesive tape.
The strip blank is vulcanized into a finished product and is executed according to the original process.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (2)
1. The utility model provides a realize layer-stepping conveyer belt forming device of permanent tension between layer which characterized in that: the device comprises a traction compaction roller and at least two constant tension devices, wherein all the constant tension devices are used for outputting constant-tension rubberized fabric and sending the rubberized fabric into the traction compaction roller layer by layer to form a layered conveying belt;
the constant tension device comprises a frequency modulation motor, a friction disc, two tension fixing rollers, a tension movable roller and a tension sensor, wherein the friction disc is connected with the output end of the frequency modulation motor, the frequency modulation motor is used for driving the friction disc to rotate, and the adhesive tape roll is linked with the friction disc and rotates along with the friction disc; the input end of one tension fixing roller corresponds to the output end of the adhesive tape roll and is used for conveying the adhesive tape led out by the adhesive tape roll driven by the friction disc along the tension fixing roller; a tension movable roller is arranged below the tension fixed roller and on the other side of the friction disc and is used for bearing the adhesive tape led out by the tension fixed roller; the other tension fixing roller and the tension fixing roller are arranged on the same horizontal position, and the two tension fixing rollers are positioned on two sides of the tension movable roller; the tension sensor is arranged on the tension movable roller and located below the tension movable roller, the tension sensor is used for sensing the tension of the adhesive tape and sending the adhesive tape into the tension controller, and the tension controller is used for adjusting the output frequency of the frequency modulation motor, so that the rotating speed of the friction disc is adjusted.
2. The forming device of the layered conveyer belt for realizing constant tension between layers as claimed in claim 1, wherein: the forming device also comprises a second traction compaction roller and a plurality of second constant tension devices, wherein the framework output by the traction compaction roller outputs the adhesive tapes with constant tension through one second constant tension device, and the adhesive tapes output by the other second constant tension devices are sent into the second traction compaction roller according to layers to form the layered conveying belt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023306169.XU CN216139618U (en) | 2020-12-30 | 2020-12-30 | Layered conveyor belt forming device capable of realizing interlayer constant tension |
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| CN202023306169.XU CN216139618U (en) | 2020-12-30 | 2020-12-30 | Layered conveyor belt forming device capable of realizing interlayer constant tension |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622402A (en) * | 2020-12-30 | 2021-04-09 | 江苏凯嘉橡胶科技股份有限公司 | Layered conveyor belt forming device and method for realizing interlayer constant tension |
| CN115027872A (en) * | 2022-05-25 | 2022-09-09 | 浙江保尔力橡塑股份有限公司 | Oil-resistant flame-retardant conveying belt with straight weft fabric cores and preparation method thereof |
| CN115058808A (en) * | 2022-06-02 | 2022-09-16 | 平湖市三禾染整股份有限公司 | Twisting machine for paper thread production |
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2020
- 2020-12-30 CN CN202023306169.XU patent/CN216139618U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622402A (en) * | 2020-12-30 | 2021-04-09 | 江苏凯嘉橡胶科技股份有限公司 | Layered conveyor belt forming device and method for realizing interlayer constant tension |
| CN115027872A (en) * | 2022-05-25 | 2022-09-09 | 浙江保尔力橡塑股份有限公司 | Oil-resistant flame-retardant conveying belt with straight weft fabric cores and preparation method thereof |
| CN115058808A (en) * | 2022-06-02 | 2022-09-16 | 平湖市三禾染整股份有限公司 | Twisting machine for paper thread production |
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