High temperature resistant conveyor belt

Abstract

The application discloses a high-temperature-resistant conveying belt, and belongs to the technical field of conveying belts. The high-temperature-resistant conveying belt can resist a temperature of 300 DEG C or above, and the cost problem of the high-temperature-resistant conveying belt in the prior art is solved. In the application, a first glue is used to form an upper working surface layer, and a second glue is used to form a lower non-working surface layer. The high-temperature-resistant performance of the first glue and the second glue decreases in turn. The first glue is mixed with ion liquid and carbon black, and then is continuously mixed in liquid phase, so that the high-temperature-resistant performance of the first glue is very high. The second glue is mixed by using a common mixing process, and the high-temperature-resistant performance and the cost of the second glue are lower than those of the first glue. According to the heat analysis of the heat-resistant conveying belt, different materials with different heat-resistant performances are used for the conveying belt from the upper working surface to the lower non-working surface, so that the cost is reduced under the premise of guaranteeing the use performance of the high-temperature-resistant conveying belt.

Description

Technical Field

[0001] This invention relates to a high-temperature resistant conveyor belt, belonging to the field of conveyor belt technology. Background Technology

[0002] Conveyor belts, used in belt conveyors, are widely used in agriculture, mining, and transportation industries to transport various solid lumps and powders or packaged goods. Conveyor belts enable continuous, high-efficiency, and steep-angle transport. They are safe to operate, easy to use and maintain, and have low transportation costs. They can also shorten transportation distances, reduce project costs, and save manpower and resources.

[0003] High-temperature resistant conveyor belts are mainly used for conveying high-temperature materials in industries such as steel, cement, and coke. A typical high-temperature resistant conveyor belt consists of a skeleton layer, a working surface layer covering the upper surface of the skeleton layer, and a non-working surface layer covering the lower surface of the skeleton layer. The skeleton layer is generally made of heat-resistant materials, such as multi-layer heat-resistant canvas or steel wire rope core, metal spiral mesh, steel cord mesh, etc. The working and non-working surface layers are generally made of styrene-butadiene rubber, butyl rubber, ethylene propylene rubber, or EPDM rubber. Among these, EPDM rubber's main chain is composed of chemically stable saturated hydrocarbons, containing only unsaturated double bonds in its side chains, thus exhibiting excellent heat resistance and making it the preferred material for high-temperature resistant conveyor belts that can withstand temperatures above 300 degrees Celsius. Currently, all high-temperature resistant conveyor belts capable of withstanding temperatures above 300 degrees Celsius are made of EPDM rubber, resulting in extremely high costs. Summary of the Invention

[0004] This invention provides a high-temperature resistant conveyor belt. Based on the heat analysis of the heat-resistant conveyor belt, the conveyor belt is made of materials with different heat resistance from the upper working surface to the lower non-working surface, thereby reducing costs while ensuring the performance of the high-temperature resistant conveyor belt.

[0005] The technical solution adopted in this invention is a high-temperature resistant conveyor belt, comprising an upper working surface layer, a lower non-working surface layer, and a skeleton layer; the skeleton layer is formed by bonding multiple layers of metal spiral mesh, and the upper working surface layer, skeleton layer, and lower non-working surface layer are stacked sequentially; the upper working surface layer is formed using rubber compound one, and the lower non-working surface layer is formed using rubber compound two; the high-temperature resistance of rubber compound one and rubber compound two decreases sequentially. The first rubber compound is prepared by continuous liquid-phase mixing and includes 90 to 110 parts by weight of modified EPDM rubber, 40 to 50 parts by weight of carbon black, 0.8 to 1.5 parts by weight of alkoxysilane coupling agent, 200 to 250 parts by weight of ionic liquid, 3 to 7 parts by weight of paraffin oil, 1 to 3 parts by weight of stearic acid, 2 to 5 parts by weight of tackifying resin, 1 to 2 parts by weight of microcrystalline wax, 1 to 2 parts by weight of dispersant, 3 to 5 parts by weight of vulcanizing agent, and 1 to 2 parts by weight of TAIC. The second rubber compound is prepared by a conventional mixing method and includes 90 to 110 parts by weight of modified ethylene propylene rubber, 40 to 50 parts by weight of carbon black, 0.8 to 1.5 parts by weight of alkoxysilane coupling agent, 3 to 7 parts by weight of paraffin oil, 1 to 3 parts by weight of stearic acid, 2 to 5 parts by weight of tackifying resin, 1 to 2 parts by weight of microcrystalline wax, 1 to 2 parts by weight of dispersant, 3 to 5 parts by weight of vulcanizing agent, and 1 to 2 parts by weight of TAIC.

[0006] The optimized high-temperature resistant conveyor belt described above is manufactured using the following steps: A1) After mixing the ionic liquid with carbon black, a liquid-phase filler slurry is formed; B1) Modified EPDM rubber latex and the liquid filler slurry formed in step A1) are simultaneously and continuously added into a rotating mixer. After mixing for a certain period of time, the material is fed into an extruder for extrusion and dehydration. After extrusion and dehydration, the material is dried. C1) Add the materials and auxiliary materials completed in step B1) into an internal mixer and mix them to obtain a compound; D1) Add auxiliary material 2 to the compound rubber and stir to mix, then vulcanize; after vulcanization, rubber compound 1 is obtained.

[0007] In the optimized high-temperature resistant conveyor belt described above, the ionic liquid is prepared by mixing citric acid and tetrabutylammonium hydroxide aqueous solution, wherein the weight ratio of citric acid to tetrabutylammonium hydroxide is 1:3; and the concentration of the tetrabutylammonium hydroxide aqueous solution is 40%.

[0008] In the optimized high-temperature conveyor belt described above, in step A1), the stirring speed of the ionic liquid and carbon black is 60-120 r / min, and the stirring time is 1 to 3 hours; in step B1), the stirring speed of the modified EPDM rubber latex and liquid filler slurry during mixing is 500-1500 r / min, and the stirring time is less than or equal to 10 seconds; in step B1), the drying temperature is less than or equal to 140 degrees Celsius; after step B1), the water content in the low-energy rubber masterbatch is less than or equal to 1%.

[0009] The optimized high-temperature resistant conveyor belt comprises the following rubber compound: 100 parts by weight of modified EPDM rubber, 45 parts by weight of carbon black, 1.2 parts by weight of alkoxysilane coupling agent, 220 parts by weight of ionic liquid, 5 parts by weight of paraffin oil, 2.02 parts by weight of stearic acid, 4 parts by weight of tackifying resin, 1.52 parts by weight of microcrystalline wax, 1.52 parts by weight of dispersant, 4.5 parts by weight of vulcanizing agent, and 1.5 parts by weight of TAIC.

[0010] The optimized high-temperature resistant conveyor belt, wherein the second rubber compound comprises 100 parts by weight of ethylene propylene rubber, 45 parts by weight of carbon black, 1.2 parts by weight of alkoxysilane coupling agent, 220 parts by weight of ionic liquid, 5 parts by weight of paraffin oil, 2.02 parts by weight of stearic acid, 4 parts by weight of tackifying resin, 1.52 parts by weight of microcrystalline wax, 1.52 parts by weight of dispersant, 4.5 parts by weight of vulcanizing agent, and 1.5 parts by weight of TAIC.

[0011] The advantages of this application are: In this application's technical solution, based on the heat exposure of the high-temperature conveyor belt during operation, rubber compounds one and two with different heat resistance are used to manufacture the upper working surface layer and the lower non-working surface layer. Since the upper working surface layer experiences higher heat than the lower non-working surface layer during operation, rubber compound one has higher heat resistance than rubber compound two. Furthermore, rubber compound one, after being mixed with ionic liquid and carbon black, ensures uniform contact between the carbon black and the ionic liquid. During continuous liquid-phase mixing, the mixture of carbon black and ionic liquid can be uniformly mixed in the rubber compound. Through the catalytic effect of the ionic liquid, the carbon black surface can achieve better silanization, improving the physical properties within rubber compound one and thus enhancing its heat resistance. Rubber compound two, using a conventional mixing method, has a lower cost than rubber compound one. It also matches the material temperature distribution. The application of rubber compounds one and two, based on the heat analysis of the heat-resistant conveyor belt, involves using materials with different heat resistance sequentially from the upper working surface to the lower non-working surface of the conveyor belt, improving performance and reducing costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this application. Detailed Implementation

[0013] The technical features of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] Example 1 A high-temperature resistant conveyor belt includes an upper working surface layer 1, a lower non-working surface layer 2, and a skeleton layer 3; the skeleton layer 3 is formed by bonding multiple layers of metal spiral mesh, and the upper working surface layer 1, the skeleton layer 3, and the lower non-working surface layer 2 are stacked sequentially.

[0015] The upper working surface layer 1 is molded using rubber compound one, while the lower non-working surface layer 2 is molded using rubber compound two. Considering the heat exposure of the conveyor belt during operation, rubber compound one has higher high-temperature resistance than rubber compound two.

[0016] The first rubber compound includes 90 parts by weight of modified EPDM rubber, 40 parts by weight of carbon black, 0.8 parts by weight of alkoxysilane coupling agent, 200 parts by weight of ionic liquid, 3 parts by weight of paraffin oil, 1 part by weight of stearic acid, 2 parts by weight of tackifying resin, 1 part by weight of microcrystalline wax, 1 part by weight of dispersant, 3 parts by weight of vulcanizing agent, and 1 part by weight of TAIC.

[0017] The first rubber compound is prepared by continuous liquid-phase mixing. The first adhesive compound is prepared through the following steps: A1) The ionic liquid and carbon black are mixed to form a liquid-phase filler slurry. The ionic liquid is prepared by mixing citric acid and tetrabutylammonium hydroxide aqueous solution, wherein the weight ratio of citric acid to tetrabutylammonium hydroxide is 1:3. The concentration of the tetrabutylammonium hydroxide aqueous solution is 40%. The stirring speed of the ionic liquid and carbon black is 60 r / min, and the stirring time is 1 hour.

[0018] B1) Modified EPDM rubber latex and the liquid filler slurry formed in step A1) are simultaneously and continuously added to a rotating mixer at a stirring speed of 500 r / min. After stirring for 7 seconds, the material is fed into an extruder for extrusion and dehydration. After extrusion and dehydration, the material is dried at 100 degrees Celsius. After step B1), the water content in the low-energy rubber masterbatch is 0.97%.

[0019] C1) Add the materials and auxiliary materials completed in step B1) into an internal mixer and mix them to obtain a compound; D1) Add auxiliary material 2 to the compound rubber and stir to mix, then vulcanize; after vulcanization, rubber compound 1 is obtained.

[0020] Compound II is prepared through a conventional mixing process. Compound II comprises 90 parts by weight of modified ethylene propylene rubber, 40 parts by weight of carbon black, 0.8 parts by weight of alkoxysilane coupling agent, 3 parts by weight of paraffin oil, 1 part by weight of stearic acid, 2 parts by weight of tackifying resin, 1 part by weight of microcrystalline wax, 1 part by weight of dispersant, 3 parts by weight of vulcanizing agent, and 1 part by weight of TAIC. Compound II is prepared through the following steps: A2) Add carbon black, auxiliary material 1, and ethylene propylene rubber to a mixer and mix them. B2) Perform high-temperature remelting on the material after step A2). C2) Add auxiliary material 2 to the material after step B2) and stir to mix; D2) Vulcanize the material after step C2); after vulcanization, rubber compound II is obtained.

[0021] Example 2 The difference between this embodiment and Embodiment 1 is that: The first rubber compound includes 110 parts by weight of modified EPDM rubber, 50 parts by weight of carbon black, 1.5 parts by weight of alkoxysilane coupling agent, 250 parts by weight of ionic liquid, 7 parts by weight of paraffin oil, 3 parts by weight of stearic acid, 5 parts by weight of tackifying resin, 2 parts by weight of microcrystalline wax, 2 parts by weight of dispersant, 5 parts by weight of vulcanizing agent, and 2 parts by weight of TAIC.

[0022] The first rubber compound is prepared by continuous liquid-phase mixing. The first adhesive compound is prepared through the following steps: A1) The ionic liquid and carbon black are mixed to form a liquid-phase filler slurry. The ionic liquid is prepared by mixing citric acid and tetrabutylammonium hydroxide aqueous solution, wherein the weight ratio of citric acid to tetrabutylammonium hydroxide is 1:3. The concentration of the tetrabutylammonium hydroxide aqueous solution is 40%. The stirring speed of the ionic liquid and carbon black is 120 r / min, and the stirring time is 3 hours.

[0023] B1) Modified EPDM rubber latex and the liquid filler slurry formed in step A1) are simultaneously and continuously added to a rotating mixer. After mixing for a certain period of time, the material is fed into an extruder for extrusion and dehydration; after extrusion and dehydration, it is dried. The mixing speed of the modified EPDM rubber latex and the liquid filler slurry is 1500 r / min, the mixing time is 9 seconds, and the drying temperature is 120 degrees Celsius. After step B1), the water content in the low-energy rubber masterbatch is 0.87%.

[0024] C1) Add the materials and auxiliary materials obtained in step B1) to a mixer and mix them to obtain a compound.

[0025] D1) Add auxiliary material 2 to the compound rubber and stir to mix, then vulcanize; after vulcanization, rubber compound 1 is obtained.

[0026] Rubber compound two is prepared by ordinary mixing method. Rubber compound two includes 110 parts by weight of modified ethylene propylene rubber, 50 parts by weight of carbon black, 1.5 parts by weight of alkoxysilane coupling agent, 7 parts by weight of paraffin oil, 3 parts by weight of stearic acid, 5 parts by weight of tackifying resin, 2 parts by weight of microcrystalline wax, 2 parts by weight of dispersant, 5 parts by weight of vulcanizing agent, and 2 parts by weight of TAIC.

[0027] Example 3 The difference between this embodiment and the above embodiments is that: Rubber compound one is prepared by continuous liquid-phase mixing. Rubber compound one is made through the following steps: A1) The ionic liquid and carbon black are mixed to form a liquid-phase filler slurry. The ionic liquid is prepared by mixing citric acid and tetrabutylammonium hydroxide aqueous solution, wherein the weight ratio of citric acid to tetrabutylammonium hydroxide is 1:3. The concentration of the tetrabutylammonium hydroxide aqueous solution is 40%. The stirring speed of the ionic liquid and carbon black is 100 r / min, and the stirring time is 2 hours.

[0028] B1) Modified EPDM rubber latex and the liquid filler slurry formed in step A1) are simultaneously and continuously added to a rotating mixer. After mixing for a certain period of time, the material is fed into an extruder for extrusion and dehydration. The mixing speed of the modified EPDM rubber latex and the liquid filler slurry is 1000 r / min, and the mixing time is 10 seconds. After completion, extrusion dehydration is performed, followed by drying at a temperature of 140 degrees Celsius. After step B1), the water content in the low-energy rubber masterbatch is 0.77%.

[0029] C1) Add the materials and auxiliary materials completed in step B1) into an internal mixer and mix them to obtain a compound; D1) Add auxiliary material 2 to the compound rubber and stir to mix, then vulcanize; after vulcanization, rubber compound 1 is obtained.

[0030] The first rubber compound includes 100 parts by weight of modified EPDM rubber, 45 parts by weight of carbon black, 1.2 parts by weight of alkoxysilane coupling agent, 220 parts by weight of ionic liquid, 5 parts by weight of paraffin oil, 2.02 parts by weight of stearic acid, 4 parts by weight of tackifying resin, 1.52 parts by weight of microcrystalline wax, 1.52 parts by weight of dispersant, 4.5 parts by weight of vulcanizing agent, and 1.5 parts by weight of TAIC.

[0031] Compound II comprises 100 parts by weight of ethylene propylene rubber, 45 parts by weight of carbon black, 1.2 parts by weight of alkoxysilane coupling agent, 220 parts by weight of ionic liquid, 5 parts by weight of paraffin oil, 2.02 parts by weight of stearic acid, 4 parts by weight of tackifying resin, 1.52 parts by weight of microcrystalline wax, 1.52 parts by weight of dispersant, 4.5 parts by weight of vulcanizing agent, and 1.5 parts by weight of TAIC.

[0032] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should be protected by the present invention.

Claims

1. A high-temperature resistant conveyor belt, comprising an upper working surface layer (1), a lower non-working surface layer (2), and a skeleton layer (3); the skeleton layer (3) is formed by bonding multiple layers of metal spiral mesh, and the upper working surface layer (1), the skeleton layer (3), and the lower non-working surface layer (2) are sequentially stacked; characterized in that: The upper working surface layer (1) is formed using rubber compound one, and the lower non-working surface layer (2) is formed using rubber compound two; the high temperature resistance of rubber compound one and rubber compound two decreases in sequence. The first rubber compound is prepared by continuous liquid-phase mixing and includes 90 to 110 parts by weight of modified EPDM rubber, 40 to 50 parts by weight of carbon black, 0.8 to 1.5 parts by weight of alkoxysilane coupling agent, 200 to 250 parts by weight of ionic liquid, 3 to 7 parts by weight of paraffin oil, 1 to 3 parts by weight of stearic acid, 2 to 5 parts by weight of tackifying resin, 1 to 2 parts by weight of microcrystalline wax, 1 to 2 parts by weight of dispersant, 3 to 5 parts by weight of vulcanizing agent, and 1 to 2 parts by weight of TAIC. The second rubber compound is prepared by a conventional mixing method. The second rubber compound includes 90 to 110 parts by weight of modified ethylene propylene rubber, 40 to 50 parts by weight of carbon black, 0.8 to 1.5 parts by weight of alkoxysilane coupling agent, 3 to 7 parts by weight of paraffin oil, 1 to 3 parts by weight of stearic acid, 2 to 5 parts by weight of tackifying resin, 1 to 2 parts by weight of microcrystalline wax, 1 to 2 parts by weight of dispersant, 3 to 5 parts by weight of vulcanizing agent, and 1 to 2 parts by weight of TAIC. The ionic liquid was prepared by mixing citric acid and an aqueous solution of tetrabutylammonium hydroxide, wherein the weight ratio of citric acid to tetrabutylammonium hydroxide was 1:3; and the concentration of the aqueous solution of tetrabutylammonium hydroxide was 40%. The first adhesive compound is prepared through the following steps: A1) After mixing the ionic liquid with carbon black, a liquid-phase filler slurry is formed; B1) Modified EPDM rubber latex and the liquid filler slurry formed in step A1) are simultaneously and continuously added into a rotating mixer. After mixing for a certain period of time, the material is fed into an extruder for extrusion and dehydration. After extrusion and dehydration, the material is dried. C1) Add the materials and auxiliary materials completed in step B1) into an internal mixer and mix them to obtain a compound; D1) Add auxiliary material 2 to the compound rubber and stir to mix, then vulcanize; after vulcanization, rubber compound 1 is obtained; In step A1), the stirring speed of the ionic liquid and carbon black is 60-120 r / min, and the stirring time is 1 to 3 hours; in step B1), the stirring speed of the modified EPDM rubber latex and liquid phase filler slurry during mixing is 500-1500 r / min, and the stirring time is less than or equal to 10 seconds; in step B1), the drying temperature is less than or equal to 140 degrees Celsius; after step B1), the water content in the low-energy rubber masterbatch is less than or equal to 1%.

2. The high-temperature resistant conveyor belt according to claim 1, characterized in that: The first rubber compound includes 100 parts by weight of modified EPDM rubber, 45 parts by weight of carbon black, 1.2 parts by weight of alkoxysilane coupling agent, 220 parts by weight of ionic liquid, 5 parts by weight of paraffin oil, 2.02 parts by weight of stearic acid, 4 parts by weight of tackifying resin, 1.52 parts by weight of microcrystalline wax, 1.52 parts by weight of dispersant, 4.5 parts by weight of vulcanizing agent, and 1.5 parts by weight of TAIC.

3. The high-temperature resistant conveyor belt according to claim 1, characterized in that: Compound II comprises 100 parts by weight of ethylene propylene rubber, 45 parts by weight of carbon black, 1.2 parts by weight of alkoxysilane coupling agent, 220 parts by weight of ionic liquid, 5 parts by weight of paraffin oil, 2.02 parts by weight of stearic acid, 4 parts by weight of tackifying resin, 1.52 parts by weight of microcrystalline wax, 1.52 parts by weight of dispersant, 4.5 parts by weight of vulcanizing agent, and 1.5 parts by weight of TAIC.

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