Flame-retardant gum dipping canvas structure

Abstract

The utility model discloses a flame-retardant gum dipping canvas structure, which relates to the technical field of gum dipping canvas and comprises a first gum dipping layer and a second gum dipping layer, the second gum dipping layer is arranged at the bottom of the first gum dipping layer, and two flame-retardant layers distributed up and down are arranged between the first gum dipping layer and the second gum dipping layer. Two reinforcing layers which are distributed up and down are arranged between the two flame-retardant layers; each flame-retardant layer comprises a plurality of first twisted threads and a plurality of second twisted threads, the first twisted threads and the second twisted threads are woven together in a crossed mode, and the first twisted threads are horizontally arranged on the plane. According to the utility model, the second twisted threads positioned in the two flame-retardant layers are arranged to be inclined towards different directions, and the fourth twisted threads positioned in the two reinforcing layers are arranged to be inclined towards different directions, so that the torsion resistance and the shearing strength of the cable in different directions are enhanced; therefore, the utility model can be ensured to be normally deformed at the rotating roller of the conveying belt.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber-impregnated canvas, in particular to a flame-retardant rubber-impregnated canvas structure. Background Art

[0002] Dipped canvas is often used as a conveyor belt in belt conveyors. Its characteristics are that it is not easy to deform in the length direction when under load, the belt is not easy to run long, the weft deformation is large, and the belt can have better troughing properties. At the same time, it has a certain adaptability to general temperature-resistant belts and has a greater adaptability to the use environment.

[0003] The structure of the dipped canvas currently on the market is a dipped canvas shown in the patent publication number CN208022235U, which increases the tensile strength of the dipped canvas by arranging steel wires in the skeleton layer. However, the addition of steel wires increases the hardness of the dipped canvas, resulting in poor flexibility of the surface, which affects the normal bending deformation of the canvas at the roller when it is used as a conveyor belt. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a flame-retardant dipped canvas structure, which enhances the torsional and shear strength of the utility model in different directions by setting the second twisted yarns in the two flame-retardant layers to be inclined in different directions and setting the fourth twisted yarns in the two reinforcement layers to be inclined in different directions, so as to ensure that the utility model can deform normally at the conveyor belt roller.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a flame-retardant dipped canvas structure, comprising a first dipped layer and a second dipped layer, the second dipped layer is arranged at the bottom of the first dipped layer, two flame-retardant layers distributed up and down are arranged between the first dipped layer and the second dipped layer, and two reinforcing layers distributed up and down are arranged between the two flame-retardant layers;

[0006] Each of the flame retardant layers comprises a plurality of first twisted threads and a plurality of second twisted threads, the plurality of first twisted threads and the plurality of second twisted threads are cross-woven together, the plurality of first twisted threads are arranged horizontally on a plane, the plurality of second twisted threads are arranged obliquely, and the second twisted threads in the two flame retardant layers are inclined in opposite directions;

[0007] Each reinforcement layer includes a plurality of third twisted threads and a plurality of fourth twisted threads, wherein the third twisted threads are arranged perpendicular to the first twisted threads on a plane, and the plurality of fourth twisted threads are arranged obliquely, and the inclination directions of the fourth twisted threads in the two reinforcement layers are opposite.

[0008] Preferably, each first twisted yarn and each second twisted yarn are formed by spirally twisting a strand of glass fiber and a strand of all-meta-aramid fiber. By twisting the glass fiber and the all-meta-aramid fiber together, it is beneficial to maintain the flame retardancy of the programmed flame retardant layer and to ensure the self-strength of the flame retardant layer.

[0009] Preferably, each third twisted yarn and each fourth twisted yarn are formed by spirally twisting a strand of carbon fiber and a strand of all-para-aramid copolymer fiber. By twisting the carbon fiber and the all-para-aramid copolymer fiber together, it can help to enhance the tensile strength of the utility model.

[0010] Preferably, the first impregnation layer and the second impregnation layer are both formed by curing the adhesive liquid.

[0011] Preferably, the two flame retardant layers and the two reinforcement layers are each provided with a plurality of through holes, and the plurality of through holes are distributed at equal intervals.

[0012] Preferably, the through holes in the flame retardant layer are connected to the through holes in the reinforcing layer, and the glue made into the first and second impregnated layers is injected into the connected through holes to bond and fix the first and second impregnated layers, the flame retardant layer and the reinforcing layer together.

[0013] Compared with the prior art, the utility model provides a flame retardant dipped canvas structure, which has the following beneficial effects:

[0014] 1. By using the first twisted wire and the second twisted wire to weave two flame retardant layers, and each of the first twisted wire and the second twisted wire is twisted with glass fiber and all-meta-aramid fiber, the heat resistance of the glass fiber and the flame barrier performance of the all-meta-aramid fiber are utilized to help enhance the flame retardancy of the utility model.

[0015] 2. The third and fourth twisted yarns twisted from carbon fiber and all-para-aramid copolymer fiber are used to weave a reinforcing layer, and the two reinforcing layers are arranged between two glass fibers to further enhance the strength of the utility model by utilizing the high strength of the carbon fiber itself.

[0016] 3. The second twisted wires in the two flame-retardant layers are arranged to be inclined in different directions, and the fourth twisted wires in the two reinforcing layers are arranged to be inclined in different directions, so as to enhance the torsional and shear strength of the utility model in different directions, so as to ensure that the utility model can deform normally at the conveyor belt roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model;

[0018] Figure 2 This is a schematic diagram of the weaving of the top flame retardant layer in the utility model;

[0019] Figure 3 This is a schematic diagram of the weaving of the bottom flame retardant layer in the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the glass fiber and the first polypropylene fiber in the utility model;

[0021] Figure 5 This is a schematic diagram of the weaving of the top reinforcement layer of the utility model;

[0022] Figure 6 This is a schematic diagram of the weaving of the bottom reinforcement layer of the utility model;

[0023] Figure 7 It is a schematic diagram of the structure of the carbon fiber and the second polypropylene fiber in the utility model.

[0024] In the figure:

[0025] 1 first dipping layer, 2 second dipping layer, 3 flame retardant layer, 31 first twisted wire, 32 second twisted wire, 33 glass fiber, 34 all-meta-aramid fiber, 4 reinforcement layer, 41 third twisted wire, 42 fourth twisted wire, 43 carbon fiber, 44 all-para-aramid copolymer fiber, 5 through hole. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, the utility model provides a flame retardant dipped canvas structure, comprising a first dipped layer 1 and a second dipped layer 2, wherein the second dipped layer 2 is arranged at the bottom of the first dipped layer 1, the first dipped layer 1 and the second dipped layer 2 are both formed by curing the glue liquid, two flame retardant layers 3 are arranged vertically between the first dipped layer 1 and the second dipped layer 2, and two reinforcing layers 4 are arranged vertically between the two flame retardant layers 3;

[0028] Moreover, a plurality of through holes 5 are provided on the two flame retardant layers 3 and the two reinforcing layers 4, and the plurality of through holes 5 are evenly spaced, and the through holes 5 in the flame retardant layer 3 are connected with the through holes 5 in the reinforcing layer 4, and the glue used to make the first adhesive layer 1 and the second adhesive layer 2 is injected into the connected through holes 5, so as to bond and fix the first adhesive layer 1, the second adhesive layer 2, the flame retardant layer 3 and the reinforcing layer 4 together, so as to increase the tightness of the connection between the first adhesive layer 1, the second adhesive layer 2, the flame retardant layer 3, the reinforcing layer 4 and the through holes 5.

[0029] Among them, Figure 2 and 3As shown, each of the flame retardant layers 3 includes a plurality of first twisted threads 31 and a plurality of second twisted threads 32, the plurality of first twisted threads 31 and the plurality of second twisted threads 32 are cross-woven together, the plurality of first twisted threads 31 are horizontally arranged on a plane, the plurality of second twisted threads 32 are inclined, the second twisted threads 32 in the two flame retardant layers 3 are inclined in opposite directions, the first twisted threads 31 in the flame retardant layer 3 are parallel to the warp threads, the second twisted threads 32 and the weft threads have an angle of 45°, and the second twisted threads 32 in the two flame retardant layers 3 are inclined in opposite directions, which helps to enhance the anti-torsion and shear strength of the utility model in different directions;

[0030] Moreover, each first twisted wire 31 and each second twisted wire 32 in the utility model are formed by twisting a strand of glass fiber 33 and a strand of all-meta-aramid fiber 34 in a spiral shape. Figure 3 As shown, the glass fiber 33 used in the present invention is an inorganic non-metallic material with excellent performance, and there are many types, and it has good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. The flame retardant layer 3 made of glass fiber 33 helps to enhance the flame retardancy of the present invention. Furthermore, the all-meta-aramid fiber 34 used in the present invention achieves the purpose of blocking flames by utilizing its own carbonization to isolate heat, thereby ensuring the flame retardancy of the flame retardant layer 3.

[0031] In addition, if Figure 5 and 6 As shown, each reinforcing layer 4 in the utility model includes a plurality of third twisted threads 41 and a plurality of fourth twisted threads 42, the third twisted threads 41 are arranged perpendicular to the first twisted threads 31 on the plane, and the plurality of fourth twisted threads 42 are arranged obliquely, the third twisted threads 41 in the reinforcing layer 4 are parallel to the weft direction, and the fourth twisted threads 42 have a certain inclination angle with the warp, which is 45°, and the inclination directions of the fourth twisted threads 42 in the two reinforcing layers 4 are opposite, which helps to enhance the torsional resistance and shear strength of the utility model in different directions, so as to ensure that the utility model can deform normally at the conveyor belt roller.

[0032] Furthermore, if Figure 7 As shown, each third twisted yarn 41 and each fourth twisted yarn 42 in the utility model are formed by twisting a strand of carbon fiber 43 and a strand of all-para-aramid copolymer fiber 44 in a spiral shape, wherein the carbon fiber 43 used refers to a high-strength and high-modulus fiber with a carbon content of more than 90%, and its high temperature resistance ranks first among all chemical fibers. It is made of acrylic fiber and viscose fiber as raw materials and is oxidized and carbonized at high temperature. That is to say, the carbon fiber 43 used in the utility model not only has a certain flame retardancy, but also has a high strength. By twisting the carbon fiber 43 and the all-para-aramid copolymer fiber 44 together, it can help to enhance the tensile strength of the utility model;

[0033] Moreover, the main outstanding advantages of the all-para-aramid copolymer fiber 44 used therein are high strength and high modulus. Its tensile strength is 6 times that of steel wire, its tensile modulus is 2-3 times that of steel wire and glass fiber, and its density is only one-fifth of that of steel wire. It is mainly used in safety protection, bulletproof, rubber product reinforcement, and high-strength cables. Therefore, the addition of all-para-aramid copolymer fiber 44 in the utility model can significantly enhance the strength of the utility model, and the fabric made of all-para-aramid copolymer fiber 44 and carbon fiber 43 has flexibility, which can meet the needs of bending deformation at the roller of the belt conveyor.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A flame retardant dipped canvas structure, characterized in that: The invention comprises a first impregnation layer (1) and a second impregnation layer (2), wherein the second impregnation layer (2) is arranged at the bottom of the first impregnation layer (1), two flame retardant layers (3) are arranged vertically between the first impregnation layer (1) and the second impregnation layer (2), and two reinforcing layers (4) are arranged vertically between the two flame retardant layers (3); Each of the flame retardant layers (3) comprises a plurality of first twisted threads (31) and a plurality of second twisted threads (32), the plurality of first twisted threads (31) and the plurality of second twisted threads (32) are cross-woven together, the plurality of first twisted threads (31) are arranged horizontally on a plane, the plurality of second twisted threads (32) are arranged obliquely, and the second twisted threads (32) in the two flame retardant layers (3) have opposite oblique directions; Each reinforcing layer (4) comprises a plurality of third twisted threads (41) and a plurality of fourth twisted threads (42), wherein the third twisted threads (41) are arranged perpendicular to the first twisted threads (31) on a plane, and the plurality of fourth twisted threads (42) are arranged obliquely, and the fourth twisted threads (42) located in the two reinforcing layers (4) have opposite inclination directions.

2. The flame retardant dipped canvas structure according to claim 1, characterized in that: Each first twisted yarn (31) and each second twisted yarn (32) are formed by twisting a strand of glass fiber (33) and a strand of all-meta-aramid fiber (34) in a spiral shape.

3. The flame retardant dipped canvas structure according to claim 1, characterized in that: Each third twisted yarn (41) and each fourth twisted yarn (42) are formed by twisting a strand of carbon fiber (43) and a strand of all-para-aramid copolymer fiber (44) in a spiral shape.

4. The flame retardant dipped canvas structure according to claim 1, characterized in that: The first impregnation layer (1) and the second impregnation layer (2) are both formed by curing the adhesive liquid.

5. The flame retardant dipped canvas structure according to claim 4, characterized in that: A plurality of through holes (5) are provided on the two flame retardant layers (3) and the two reinforcing layers (4), and the plurality of through holes (5) are distributed at equal intervals.

6. The flame retardant dipped canvas structure according to claim 5, characterized in that: The through hole (5) located in the flame retardant layer (3) is connected to the through hole (5) located in the reinforcing layer (4), and the glue liquid used to make the first impregnated layer (1) and the second impregnated layer (2) is injected into the connected through hole (5) to bond and fix the first impregnated layer (1), the second impregnated layer (2), the flame retardant layer (3) and the reinforcing layer (4) together.

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