Anti-delaminating structure for covered edge of single-layer belt core conveying belt

Abstract

The invention provides a single-layer belt core conveyor belt covered edge anti-delamination structure which comprises a conveyor belt core layer, covered edge structures wrap the two sides of the conveyor belt core layer, covered edge cushion rubber is arranged on the portion, between the covered edge structures, of the conveyor belt core layer, a reinforcing layer is arranged on the covered edge cushion rubber on the upper side, and belt edge covering rubber is arranged outside the reinforcing layer and the covered edge structures to form an integral structure. And the upper side and the lower side of the integral structure are provided with covering adhesive layers. Firstly, the edge of the belt core layer of the single-layer belt core conveying belt is wrapped by the edge wrapping structure to protect the edge, the reinforcing layer is arranged to enhance the delamination resistance of the edge wrapping structure, then the edge wrapping structure and the reinforcing layer are wrapped by the belt edge wrapping rubber to reduce the layering probability after damage, and finally the covering rubber layers are arranged at the upper end and the lower end of the whole wrapped by the belt edge wrapping rubber. The risk of layering after the belt edge of the single-layer belt core conveying belt is abraded is effectively reduced, the service life of the single-layer belt core conveying belt is prolonged, and meanwhile the anti-delamination structure can be used on a connector of the single-layer belt core conveying belt.

Description

Technical Field

[0001] The invention relates to the technical field of conveyor belts, and in particular to an edge-wrapped anti-delamination structure of a single-layer core conveyor belt. Background Art

[0002] With the promotion of single-layer core conveyor belts, the advantages of single-layer core conveyor belts, such as light weight, environmental protection, and high transport capacity, have also been accepted by customers. Under the influence of the general environment, it has become a trend to use single-layer core conveyor belts to replace steel cord conveyor belts of the same specification and strength. In view of the practicality of single-layer core conveyor belts, the weaknesses of single-layer core conveyor belts can be compensated by changing their structure, thereby enhancing their service life. In the future, they will definitely gradually replace steel cord conveyor belts.

[0003] Due to its unique fabric material weaving structure, the strength performance of the single-layer core conveyor belt is completely equivalent to that of the wire rope core conveyor belt of the same level. However, the fabric structure needs to transmit force through the weft yarn. One of the disadvantages is that the weft yarn head has poor adhesion with the rubber compound. Even if the fabric is locked through the process, the risk cannot be completely avoided. This makes it easy for the edge of the single-layer core conveyor belt to be worn, causing the weakly bonded fabric edge to crack at a single point, resulting in the overall cracking and delamination of the conveyor belt edge, causing the conveyor belt to stop operating.

[0004] In summary, it can be found that how to avoid cracking of the edge of a single-layer conveyor belt after damage and reduce the risk of edge delamination are technical issues that technical engineers in this field need to improve and perfect, and they are extremely important. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a single-layer core conveyor belt edge wrapping anti-delamination structure, which can effectively reduce the risk of delamination after the single-layer core conveyor belt edge wear and increase the service life of the single-layer core conveyor belt.

[0006] A single-layer conveyor belt with an anti-delamination structure having an edge wrapping, which comprises a conveyor belt core layer, the conveyor belt core layer is covered with an edge wrapping structure on both sides, an edge wrapping rubber is arranged on the conveyor belt core layer between the edge wrapping structures, a reinforcement layer is arranged on the upper edge wrapping rubber, a belt edge wrapping rubber is arranged outside the reinforcement layer and the edge wrapping structure to form an integral structure, and a covering rubber layer is arranged on the upper and lower sides of the integral structure.

[0007] Preferably, the single-layer core conveyor belt edging anti-delamination structure, wherein the edging structure includes a first horizontal portion, a vertical portion and a second horizontal portion, the first horizontal portion is arranged on the upper side of the conveyor belt core layer, the second horizontal portion is arranged on the lower side of the conveyor belt core layer, the vertical portion is arranged between the first horizontal portion and the second horizontal portion, the length of the second horizontal portion is at least 100mm greater than the length of the first horizontal portion; the distance between the two second horizontal portions coated on the lower side of the conveyor belt core layer is ≥400mm.

[0008] Preferably, in the single-layer core conveyor belt edge-wrapped anti-delamination structure, the edge-wrapped rubber pad is arranged on the upper and lower sides of the conveyor belt core layer that is not coated with the edge-wrapped structure.

[0009] Preferably, in the single-layer conveyor belt edge-wrapping anti-delamination structure, the length of the reinforcement layer is at least 400 mm greater than the length of the upper edge-wrapping rubber.

[0010] Preferably, the single-layer core conveyor belt edge-wrapped anti-delamination structure comprises a fabric layer and rubber layers arranged on both sides of the fabric layer.

[0011] Preferably, in the single-layer core conveyor belt edge-wrapped anti-delamination structure, the edge-wrapped rubber and the belt edge rubber are made of the same material as the rubber layer.

[0012] Preferably, in the anti-delamination structure of the edge wrapping of the single-layer core conveyor belt, the distance between one side of the reinforcement layer and the same side of the core layer of the conveyor belt is ≥100 mm.

[0013] Preferably, in the single-layer core conveyor belt edge-wrapped anti-delamination structure, the reinforcement layer comprises a fabric layer and a rubber layer arranged above and below the fabric layer; and the thickness of the reinforcement layer is greater than 2 mm.

[0014] Preferably, in the single-layer core conveyor belt edge-wrapped anti-delamination structure, the fabric layer is made of synthetic fiber canvas; and the rubber layer is made of vulcanized mixed rubber.

[0015] Preferably, in the single-layer core conveyor belt edge-wrapped anti-delamination structure, the vulcanized rubber compound comprises the following components in parts by weight:

[0016] 30-35 parts of natural rubber, 65-70 parts of styrene-butadiene rubber, 10-20 parts of aromatic oil, 15-25 parts of tackifier, 5-10 parts of zinc oxide, 20-30 parts of carbon black N330, 10-15 parts of white carbon black, 3.0-5.0 parts of antioxidant, 2.0-7.0 parts of accelerator, and 2.0-7.0 parts of vulcanizing agent.

[0017] The tackifier is selected from at least two of coumarone, adhesive RA, adhesive RS, and tackifying resin BN-1; the antioxidant is selected from at least one of antioxidant BLE-65, antioxidant 6PPD, and antioxidant RD; the accelerator is selected from one of accelerator M, accelerator DM, and accelerator CZ; and the vulcanizing agent is sulfur.

[0018] Advantages of the present invention:

[0019] (1) The anti-delamination structure of the edge wrapping of the single-layer core conveyor belt of the present invention firstly covers the edge of the core layer of the single-layer core conveyor belt with the edge wrapping structure to protect the edge of the core layer of the single-layer core conveyor belt, and then arranges a reinforcement layer on the upper end of the edge wrapping structure to enhance the anti-delamination effect of the edge wrapping structure, and then covers the edge wrapping structure and the reinforcement layer with rubber wrapping to reduce the probability of delamination after damage, and finally arranges covering rubber layers on the upper and lower ends of the whole belt edge wrapping, which effectively reduces the risk of delamination of the single-layer core conveyor belt after the edge is worn, and improves the service life of the single-layer core conveyor belt. At the same time, this anti-delamination structure can also be used on the joints of the single-layer core conveyor belt.

[0020] (2) The anti-delamination structure of the edge wrapping of the single-layer core conveyor belt of the present invention comprises a fabric layer and a rubber layer arranged on both sides of the fabric layer, the material of the edge wrapping pad rubber and the edge wrapping rubber is the same as the rubber layer; the reinforcement layer comprises a fabric layer and a rubber layer arranged above and below the fabric layer, the material of the fabric layer is synthetic fiber canvas; the material of the rubber layer is vulcanized rubber compound, the vulcanized rubber compound is based on natural rubber and styrene-butadiene rubber, and is added with aromatic oil, tackifier, zinc oxide, carbon black N330, white carbon black, antioxidant, accelerator and vulcanizing agent, so as to improve the bonding strength between the core layer, edge wrapping structure, edge wrapping pad rubber, reinforcement layer, edge wrapping rubber and covering rubber layer of the conveyor belt, thereby further reducing the risk of delamination of the edge of the single-layer core conveyor belt after wear and tear, and improving the service life of the single-layer core conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the anti-delamination structure of the edge wrapping of a single-layer core conveyor belt of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the hemming of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the reinforcement layer of the present invention.

[0024] Figure 4 It is an exploded view of the anti-delamination structure of the edge wrapping of the single-layer core conveyor belt of the present invention. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments.

[0026] Example 1

[0027] like Figure 1-Figure 4 A single-layer conveyor belt with an anti-delamination structure comprising a conveyor belt core layer 11, wherein the conveyor belt core layer 11 is covered with an edging structure 12 on both sides, an edging rubber pad 13 is arranged on the conveyor belt core layer 11 between the edging structures 12, and a reinforcement layer 15 is arranged on the upper edging rubber pad 13, and a belt edge rubber bag 14 is arranged outside the reinforcement layer 15 and the edging structure 12 to form an integral structure, and a covering rubber layer 16 is arranged on the upper and lower sides of the integral structure.

[0028] The material of the covering rubber layer 16 is the same as the covering layer material disclosed in Patent Application No. 201510244286.2, Patent Name Rubber for Covering Layer of Fabric Core Laminated Flame Retardant Conveyor Belt and Preparation Method thereof.

[0029] The edge structure 12 includes a first horizontal portion 121, a vertical portion 122, and a second horizontal portion 123. The first horizontal portion 121 is arranged on the upper side of the conveyor belt core layer 11, and the second horizontal portion 123 is arranged on the lower side of the conveyor belt core layer 11. The vertical portion 122 is arranged between the first horizontal portion 121 and the second horizontal portion 123. The length of the second horizontal portion 123 is 100 mm greater than that of the first horizontal portion. Figure 2 Marked as L1; the distance L2 between the two second horizontal parts 123 coated on the lower side of the conveyor belt core layer 11 is 500mm; the edging rubber pad 13 is arranged on the upper and lower sides of the conveyor belt core layer 11 not coated with the edging structure 12; the length of the reinforcement layer 15 is 500mm longer than the length of the edging rubber pad 13 on the upper side; the edging structure 12 includes a fabric layer and a rubber layer arranged on both sides of the fabric layer; the edging rubber pad 13 and the edge rubber 14 are made of the same material as the rubber layer; the distance L3 between one side of the reinforcement layer 15 and the same side of the conveyor belt core layer 11 is 100mm larger.

[0030] The reinforcement layer 15 includes a fabric layer and a rubber layer arranged above and below the fabric layer, and the thickness of the reinforcement layer 15 is greater than 2 mm; the fabric layer is made of synthetic fiber canvas, which is aramid fiber woven canvas; the rubber layer is made of mixed rubber, which is a vulcanized mixed rubber that has strong adhesion to the synthetic fiber canvas, and the vulcanized mixed rubber includes the following components:

[0031] 30 parts of natural rubber, 70 parts of styrene-butadiene rubber, 10 parts of aromatic oil, 10 parts of coumarone, 3.0 parts of adhesive RA, 2.0 parts of tackifying resin BN-1, 5.0 parts of zinc oxide, 25 parts of carbon black N330, 10 parts of white carbon black, 3.0 parts of antioxidant BLE-65, 1.5 parts of accelerator M, 1.5 parts of accelerator DM, 0.5 parts of accelerator CZ, and 2.5 parts of sulfur.

[0032] The material 11 and the reinforcement layer 15 used for the edge wrapping of the core layer of the present invention are placed in the same direction as the core layer. Compared with the ordinary single-layer core conveyor belt, the edge can be effectively protected, so that the probability of delamination caused by edge damage of the single-layer core conveyor belt can be reduced by 80%, successfully improving the service life of the single-layer core conveyor belt.

[0033] The preparation method of the anti-delamination structure of the edge wrapping of a single-layer core conveyor belt provided by the present invention comprises the following steps: firstly, an edge wrapping structure 12 is wrapped around the edge of the core layer 11 of the single-layer core conveyor belt, and the interval between the two edge wrapping structures 12 is covered by an edge wrapping rubber 13, and then a reinforcement layer 15 is arranged on the edge wrapping rubber 13 at the upper end, and then the edge wrapping material 12 and the reinforcement layer 15 are covered with a belt edge wrapping rubber 14, and finally a covering rubber layer 16 is arranged at the upper and lower ends of the whole.

[0034] The single-layer core conveyor belt edge wrapping anti-delamination structure provided by the present invention first protects the edge of the core layer 11 of the single-layer core conveyor belt through the edge wrapping structure 12, and the length of the second horizontal portion 123 is at least 100mm larger than the length of the first horizontal portion; the distance between the two second horizontal portions 123 wrapped around the lower side of the conveyor belt core layer 11 is ≥400mm in order to meet the grooving requirements, the reinforcement layer 15 enhances the anti-delamination effect of the edge structure 12, and the finally arranged belt edge rubber wrapping 14 serves as a double insurance for edge anti-delamination, thereby reducing the probability of delamination after damage.

[0035] Example 2

[0036] The difference between Example 2 and Example 1 is that the length of the second horizontal portion 123 is 200 mm greater than that of the first horizontal portion; the distance between the two second horizontal portions 123 wrapped around the lower side of the conveyor belt core layer 11 is 450 mm; the length of the reinforcement layer 15 is 450 mm greater than the length of the upper edge pad rubber 13; the distance between one side of the reinforcement layer 15 and the same side of the conveyor belt core layer 11 is 200 mm; the reinforcement layer 15 includes a fabric layer and a rubber layer arranged above and below the fabric layer, and the thickness of the reinforcement layer 15 is 3 mm; the material of the fabric layer is synthetic fiber canvas; the material of the rubber layer is mixed rubber, and the mixed rubber is vulcanized rubber that has strong adhesion to synthetic fiber canvas.

[0037] 32 parts of natural rubber, 68 parts of styrene-butadiene rubber, 15 parts of aromatic oil, 12 parts of coumarone, 3.0 parts of adhesive RA, 4.0 parts of adhesive RS, 3.0 parts of tackifying resin BN-1, 5.0 parts of zinc oxide, 25 parts of carbon black N330, 10 parts of white carbon black, 3.0 parts of antioxidant BLE-65, 1.5 parts of accelerator M, 1.5 parts of accelerator DM, 0.5 parts of accelerator CZ, and 2.5 parts of sulfur.

[0038] Example 3

[0039] The differences between Example 3 and Example 1 are as follows: the length of the second horizontal portion 123 is 100 mm greater than that of the first horizontal portion; the distance between the two second horizontal portions 123 wrapped around the lower side of the conveyor belt core layer 11 is 400 mm; the length of the reinforcement layer 15 is 400 mm greater than the length of the upper edge rubber pad 13; the distance between one side of the reinforcement layer 15 and the same side of the conveyor belt core layer 11 is 100 mm; the reinforcement layer 15 includes a fabric layer and a rubber layer arranged above and below the fabric layer, and the thickness of the reinforcement layer 15 is 2 mm; the material of the fabric layer is synthetic fiber canvas; the material of the rubber layer is mixed rubber, and the mixed rubber is vulcanized rubber that has strong adhesion to synthetic fiber canvas.

[0040] 35 parts of natural rubber, 65 parts of styrene-butadiene rubber, 20 parts of aromatic oil, 12 parts of coumarone, 3.0 parts of adhesive RA, 4.0 parts of adhesive RS, 6.0 parts of tackifying resin BN-1, 5.0 parts of zinc oxide, 25 parts of carbon black N330, 10 parts of white carbon black, 3.0 parts of antioxidant BLE-65, 1.5 parts of accelerator M, 1.5 parts of accelerator DM, 0.5 parts of accelerator CZ, and 2.5 parts of sulfur.

[0041] The single-layer belt core conveyor belt edge-wrapped anti-delamination structure of Example 3 was subjected to an impact test. The impact test was conducted with reference to HG / T 3646-2014 "General-Purpose Tear-Resistant Steel Wire Cord Conveyor Belt" - Appendix A. In the impact test, the energy required for the edge glue to be damaged by impact was increased. Except for the different structures, the sample belts used in the test were the same in terms of other specifications, skeletons, covering glue properties, edge glue properties, etc. The specific test results are shown in Table 1.

[0042] Table 1

[0043]

[0044]

[0045] The energy required to break the edge rubber due to impact has increased from more than 750 joules to 1000 joules.

[0046] After the edge glue is damaged, the belt core may be directly exposed, causing the interface between the belt core and the covering glue to be corroded by dust, materials, and water vapor in the environment, resulting in delamination between the belt core and the covering glue, thereby affecting the service life and maintenance cost of the conveyor belt. Taking the conventional aramid belt in coal mines as an example, if damaged edge glue or exposed belt core is found during the inspection, the user will be advised to perform cold glue repair on the damaged part within one month. If it is not repaired in time, the damaged part will show obvious delamination after three months. At this time, the original covering glue needs to be peeled off and re-vulcanized for repair. No matter which type of repair is used, it will take up a certain amount of production time, thereby increasing the operation and maintenance cost.

[0047] The aramid conveyor belt with a new structure will not experience the above situation when facing the same situation. To verify the reliability of the structure, we found three places with similar damage area and degree on the line where edge damage occurred and conducted observations for 11 months. The specific situation on site is shown in Table 2.

[0048] Table 2

[0049] Cumulative time (month) 1# 2# 3# 1 none none none 2 none none none 3 none none none 4 none none none 5 none none The area becomes larger 6 none none none 7 none none none 8 The area becomes larger none none 9 none none none 10 none none The area becomes larger 11 none none none

[0050] As shown in Table 2, lateral expansion occurred at all three test points, i.e. no delamination occurred. Longitudinal expansion occurred at two test points, but it did not affect the normal operation of the line. The edge glue damage at many parts of the line under experimental observation was repaired centrally during the planned maintenance to minimize the impact on production.

[0051] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A single-layer core conveyor belt edge wrapping anti-delamination structure, characterized in that: The conveyor belt comprises a core layer (11), the core layer (11) of the conveyor belt is covered with an edge structure (12) on both sides, an edge rubber pad (13) is arranged on the core layer (11) of the conveyor belt between the edge structures (12), a reinforcement layer (15) is arranged on the upper edge rubber pad (13), and a belt edge rubber pad (14) is arranged outside the reinforcement layer (15) and the edge structure (12) to form an integral structure, and a covering rubber layer (16) is arranged on the upper and lower sides of the integral structure.

2. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 1 is characterized in that: The edging structure (12) comprises a first horizontal portion (121), a vertical portion (122) and a second horizontal portion (123), wherein the first horizontal portion (121) is arranged on the upper side of the conveyor belt core layer (11), the second horizontal portion (123) is arranged on the lower side of the conveyor belt core layer (11), the vertical portion (122) is arranged between the first horizontal portion (121) and the second horizontal portion (123), and the length of the second horizontal portion (123) is at least 100 mm greater than the length of the first horizontal portion; and the distance between the two second horizontal portions (123) wrapped around the lower side of the conveyor belt core layer (11) is ≥400 mm.

3. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 1 is characterized in that: The edge binding rubber (13) is arranged on the upper side and the lower side of the conveyor belt core layer (11) that is not covered with the edge binding structure (12).

4. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 1, characterized in that: The length of the reinforcement layer (15) is at least 400 mm greater than the length of the upper edge glue pad (13).

5. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 1, characterized in that: The edge binding structure (12) comprises a fabric layer and adhesive layers arranged on both sides of the fabric layer.

6. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 5, characterized in that: The edge rubber pad (13) and the edge rubber pad (14) are made of the same material as the adhesive layer.

7. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 1, characterized in that: The distance between one side of the reinforcement layer (15) and the same side of the conveyor belt core layer (11) is ≥100 mm.

8. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 1, characterized in that: The reinforcement layer (15) comprises a fabric layer and a rubber layer arranged above and below the fabric layer; the thickness of the reinforcement layer (15) is greater than 2 mm.

9. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 6 or 8, characterized in that: The material of the fabric layer is synthetic fiber canvas; the material of the rubber layer is vulcanized mixed rubber.

10. The single-layer core conveyor belt edge-wrapped anti-delamination structure according to claim 9, characterized in that: The vulcanized rubber compound comprises the following components in parts by weight: 30-35 parts of natural rubber, 65-70 parts of styrene-butadiene rubber, 10-20 parts of aromatic oil, 15-25 parts of tackifier, 5-10 parts of zinc oxide, 20-30 parts of carbon black N330, 10-15 parts of white carbon black, 3.0-5.0 parts of antioxidant, 2.0-7.0 parts of accelerator, and 2.0-7.0 parts of vulcanizing agent.

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