A reinforcement cord construction for improving the bonding strength and performance of conveyor belts

Abstract

A synthetic fiber cord construction for improving the bonding strength and performance of conveyor belts, including a central core (2) and at least three, preferably four, preferably five, in particular six, peripheral cores (1) set on the periphery of the central core (2), the six peripheral cores (1) forming a cord layer and each peripheral core (1) being in tangential contact with the central core (2), wherein the central core (2) and the peripheral cores (1) form a cord, the outer side of which is filled with a covering body (3). The synthetic fiber cord construction improves the bonding strength and performance of conveyor belts by effectively reducing the possibility of bonding failure between the reinforcement cord and the covering body; at the same time, the buffering performance of the reinforcement layer of the conveyor belt can be improved, making the conveyor belt more coordinated thus to improve its service life.

Description

[0001] A reinforcement cord construction for improving the bonding strength and performance of conveyor belts

[0002] Technical Field

[0003] This utility model relates to the field of conveyor belt technology, in particular to a reinforcement cord construction for improving the bonding strength and performance of conveyor belts.

[0004] Background Art

[0005] The main reasons for the damage of conveyor belts during usage are as follows: Firstly, the bonding strength between the reinforcement cord and the covering body of the conveyor belt is low, and after running for a period of time, the bonding fails, resulting in the inability of the conveyor belt to drive normally. Secondly, under the friction between conveyed materials and the conveyor belt, the covering body of the conveyor belt is eroded, making it unable to operate normally. Thirdly, under the impact and load of conveyed materials, the bending stress of the conveyor belt causes the reinforcement cord to break, resulting in the inability of the conveyor belt to operate. Improving the bonding strength between the reinforcement cord and the covering body of the conveyor belt, as well as the impact resistance of the reinforcement cord, is an important measure to improve the performance of the conveyor belt.

[0006] Summary of the invention

[0007] The technical problem that the present invention aims to solve is to overcome the shortcomings of existing technology and provide a reinforcement cord construction that improves the bonding strength and performance of conveyor belts. A further object of the invention is to provide a conveyor belt including such a reinforcement cord construction.

[0008] In order to solve the technical problems mentioned above, the invention provides a reinforcement cord construction according to claim 1 and a conveyor belt according to claim 10. This invention relates to a reinforcement cord construction that improves the bonding strength and performance of conveyor belt. The reinforcement cord construction includes a central core, at least three, preferably four, preferably five, most preferably six, peripheral cores set on the periphery of the central core, the peripheral cores forming a cord layer. Each peripheral core is in tangential contact with the central core. The central core and the peripheral cores form a synthetic fiber cord. The outer side of the cord is filled with a covering body.

[0009] The reinforcement cord construction improves the bonding strength and performance of conveyor belts. By adopting the structure as defined above, in particular arranging the peripheral cores on the periphery of the central core and contacting the central core’s circumferential surface tangentially, the inventive reinforcement cord construction can effectively reduce the possibility of bonding failure between the reinforcement cord and the covering body. At the same time, the buffering performance of the reinforcement layer of a conveyor belt comprising the reinforcement cord construction can be improved, making the conveyor belt more coordinated to improve its service life.

[0010] The construction composed of the central core and, preferably six, peripheral cores has better effect on rubber adsorption during vulcanization operation, making the bonding among the covering body, the central core, and the peripheral cores tighter, and the rubber penetrates deeper. Therefore, the bonding strength between the covering body and the cord is much higher, which effectively reduces the possibility of bonding failure between the cord and the covering body.

[0011] Filling the outer side of the cord with the covering body includes embedding the cord layer comprised of the peripheral cores into the covering material. Respectively, the cord layer of peripheral cores may be, in particular fully, embedded in a layer of covering material.

[0012] According to a preferred embodiment, each of the peripheral cores may comprise multiple first fiber filaments. The multiple first fiber filaments may be twisted and compacted to obtain the peripheral core.

[0013] Similarly, the central core may include multiple second fiber filaments. The second fiber filaments may be twisted and compacted to obtain the central core.

[0014] Preferably, the central core and / or the peripheral cores are each formed by multiple fiber filaments. Using multiple filaments and twisting same improves the strength, in particular the longitudinal strength, of each of the central core or the peripheral cores. The fiber filaments may be formed by a synthetic material, thus providing a synthetic fiber central core and / or a cord layer made of synthetic fiber peripheral cores. Since the central core or the cord layer of the peripheral cords are formed by synthetic fibers, the cord made of the central core and the peripheral cords forms a synthetic fiber cord.

[0015] In a preferred embodiment of the invention, the number of the first fiber filaments is 4 to 50. In particular, the number of the first fiber elements may be between 10 and 50, in particular between 20 and 50, in particular between 30 and 50. The number of the second fiber filaments may be between 4 and 120, in particular between 10 and 120, in particular between 20 and 120, in particular between 40 and 120, in particular between 60 and 100.

[0016] In order to enhance the strength of the central core further, the twist of the peripheral core may be between 40 TPM and 80 TPM, in particular between 50 TPM and 80 TPM, in particular between 60 TPM and 80 TPM. “TPM” means “turns per meter”. The twist of the central core may be between 20 TPM and 40 TPM less than the twist of the peripheral cores. In particular, the twist of the central core may be 40 TPM at maximum.

[0017] Preferably, the twist of the central core is in any case less than the twist of the peripheral cores and thus the central core construction is looser than that of the peripheral core. Thus, when covering the synthetic fiber cord with the covering body, the material of the covering body may fill not only the gaps between the peripheral cores but may also flow into or penetrate the central core. This provides for an enhanced bonding between the central core and the cord layer of the peripheral cores.

[0018] The construction of a loose central core and tight peripheral cores improves the buffering performance of the reinforcement layer of the conveyor belt, thereby improving the impact resistance and bending resistance of the conveyor belt. This makes a conveyor belt comprising the inventive reinforcement cord construction more coordinated thus to improve its service life.

[0019] According to a preferred embodiment of the invention, the covering body is made of rubber material. The covering body may form the load-bearing, in particular flat, surfaces of a conveyor belt. Alternatively, the covering body may fill the gaps between the cores, thus forming a coated cord having a round cross-section, wherein the cord may further be integrated as a reinforcement member into a conveyor belt.

[0020] The first fiber filaments may be made of polyester fiber, poly(p-phenylen-2,6-benzobisoxazol) (“PBO”) fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers. Additionally or alternatively, the second fiber filaments may be made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers.

[0021] Generally, both the first fiber filaments and the second fiber filaments may have gone through a chemical treatment.

[0022] An additional aspect of the invention relates to a conveyor belt including the above described reinforcement cord construction.

[0023] Brief description of the drawings

[0024] The attached drawing are used to provide a further understanding of the present invention and form a part of the specification. They are used to explain the embodiments described below and do not constitute a limitation of the present invention.

[0025] In the attached drawings,

[0026] Fig. 1 shows a cross section of a reinforcement cord construction of the present invention according to a preferred embodiment; and

[0027] Fig. 2 shows a cross section of a reinforcement cord construction of the present invention according to an alternative preferred embodiment.

[0028] Preferred embodiments

[0029] The following is a description of the preferred embodiments of the present invention based on the attached drawings. It should be understood that the preferred embodiment described here is only used to illustrate and explain the invention, and are not used to limit the scope of protection of the present invention.

[0030] The same number in the attached drawing all refer to the same components.

[0031] Fig. 1 and 2 show different embodiments of a reinforcement cord construction, in particular a synthetic fiber cord construction, that comprises six peripheral cores 1 made of multiple first fiber filaments 4 and a central core 2 made of multiple second fiber filaments 5. The peripheral cores 1 are arranged around central core 2 and form a cord layer surrounding the central core 2. In each embodiment, the peripheral cores 1 abut the central core 2. In particular, the peripheral cores 1 are in tangential contact with the central core 2. The embodiments shown in Fig. 1 and 2 also include a covering body 3. The covering body 3 is preferably made of a flexible material. Preferably, the covering body 3 is made of a rubber material. The covering body 3 surrounds and covers the peripheral cores 1 such that the peripheral cores 1 are embedded in the covering body. Thus the outer side of the central core 2 and the six peripheral cores 1 are covered with the covering body 3.

[0032] The peripheral cores 1 include multiple first fiber filaments 4, which are twisted and compacted to obtain the peripheral core 1. The number of the first fiber filaments 4 may be 4 to 50, and the twist of each peripheral core 1 may between 40 TPM and 80 TPM. The outer diameter tolerance between each peripheral core 1 may be within ± 0.05mm.

[0033] The central core 2 includes multiple second fiber filaments 5, which are twisted and compacted to obtain the central core 2. The number of the second fiber filaments 5 may be 4 to 120, and the twist of central core 2 may be 20 TPM to 40 TPM less than the twist of the peripheral cores 1.

[0034] Generally, the twist of the central core 2 in the reinforcement cord construction is less than the twist of each of the peripheral cores 1. In other words, the filament density of the central core 2 is looser than the filament density of the peripheral cores 1. The construction composed of the central core 2 and six peripheral core 1 has an enhanced effect on covering material adsorption, allowing the covering body 3 to bind more tightly with the central core 2 and six peripheral cores 1, thereby improving the bonding strength between the covering body 3 and the whole cord. The material of the covering body 3 may be rubber.

[0035] Preferably, the covering body 3 is obtained by vulcanized rubber liquid. The high twist structure of the peripheral cores 1 is very stable, while the comparatively loose twist of the central core 2 provides a lower stability. However, the more loose twist of the central core 2 allows the rubber liquid covered around the central core 2 and the six peripheral cores 1 to better penetrate towards the direction of the central core 2. This improves the bonding strength among the vulcanized rubber, the central core 2 and the six peripheral cores 1.

[0036] The first fiber filaments 4 may be made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers. The second fiber filaments 5 may be made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers. Furthermore, both the first fiber filaments 4 and the second fiber filaments 5 may have gone through chemical treatment. The embodiment of Fig. 1 comprises a central core 2 and six peripheral cores 1 that abut the central core 2. The diameter of the central core 2 and the peripheral cores 1 are configured such that the peripheral cores 1 are not only in tangential contact with the central core 2 but also to their neighbouring peripheral cores 1. The cord layer comprising the peripheral cores 1 thus has no gap between each peripheral core 1.

[0037] In the embodiment of Fig. 2, the central core 2 has a bigger diameter than in the embodiment of Fig. 1. This may be achieved by increasing the number of the second filaments 5 that form the central core. Moreover, the peripheral cores 1 may have a smaller diameter compared to the peripheral cores 1 of Fig. 1. This may be achieved by decreasing the number of first filaments 4. As result, the peripheral cores 1 still are in tangential contact with the central core 1 but are distanced from each other. Gaps are formed between neighbouring peripheral cores 2, thus providing space for the covering body 2 to reach the central core more easily during vulcanization of the cord with the covering material.

[0038] The present invention provides for a reinforcement cord construction, in particular a synthetic fiber cord construction, that improves the bonding strength and performance of conveyor belts. By adopting this construction, it can effectively reduce the possibility of bonding failure between the reinforcement cord and the covering body; at the same time, the buffering performance of the reinforcement layer of the conveyor belt can be improved, making the conveyor belt more coordinated thus to improve its service life.

[0039] Finally, it should be noted that the above are only preferred embodiment of the present utility model and are not used to limit the present utility model. Although detailed explanations of the present utility model have been provided with reference to the aforementioned embodiment, it is still possible for those skilled in the field to modify the technical solutions recorded in the aforementioned embodiment or to equivalently replace some of their technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

[0040] In addition to the described embodiments above, the following embodiments of the invention are disclosed:

[0041] 1. A synthetic fiber cord construction that improves the bonding strength and performance of conveyor belts, including a central core (2), six peripheral cores (1) set on the periphery of central core (2), which form a cord layer. Each peripheral core (1) is in tangential contact with the central core (2), and the central core(2) and six peripheral cores(l) form a cord. The outer side of the cord is filled with a covering body (3). According to embodiment 1, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts, characterized in that the peripheral core (1) include multiple the first fiber filaments (4), which are twisted and compacted to obtain the peripheral core. According to embodiment 2, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts , characterized in that the central core (2) include multiple the second fiber filaments (5), which are twisted and compacted to obtain the central core (2). According to embodiment 3, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts , characterized in that the number of the first fiber filaments (4) is 4-50, and the twist of the peripheral core (1) is 40-80TPM. According to embodiment 4, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts, characterized in that the number of the second fiber filaments (5) is 4-120, and the twist of the central core (2) is 20-40TPM less than that of the peripheral core (1). According to embodiment 2-5, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts, characterized in that the covering body (3) is made of rubber material. According to embodiment 3-5, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts, characterized in that the first fiber filament (4) is made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers. According to embodiment 7, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts, characterized in that the second fiber filament (5) is made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers. According to embodiment 8, a synthetic fiber core structure for improving the adhesive strength and performance of conveyor belts, characterized in that the first fiber filament (4) and the second fiber filament (5) have gone through chemical treatment. Reference signs

[0042] 1 peripheral core

[0043] 2 center core

[0044] 3 covering body 4 first fiber filaments

[0045] 5 second fiber filaments

Claims

Claims1. A reinforcement cord construction for improving the bonding strength and performance of conveyor belts, including a central core (2) and at least three, preferably four, preferably five, most preferably six, peripheral cores (1) set on the periphery of the central core (2), the peripheral cores (1) forming a cord layer and each peripheral core (1) being in tangential contact with the central core (2), wherein the central core (2) and the peripheral cores (1) form a synthetic fiber cord, the outer side of which is filled with a covering body (3).

2. The reinforcement cord construction according to claim 1, characterized in that each of the peripheral cores (1) include multiple first fiber filaments (4), which are twisted and compacted to obtain the peripheral core.

3. The reinforcement cord construction according to claims 1 or 2, characterized in that the central core (2) includes multiple second fiber filaments (5), which are twisted and compacted to obtain the central core (2).

4. The reinforcement cord construction according to claim 2 or 3, characterized in that the number of the first fiber filaments (4) is 4 to 50, and / or the number of the second fiber filaments (5) is 4 to 120.

5. The reinforcement cord construction according to any of the preceding claims, characterized in that the twist of the peripheral core ( 1) is 40 TPM to 80 TPM and / or the twist of the central core (2) is 20 TPM to 40 TPM less than that of the peripheral core (1).

6. The reinforcement cord construction according to any of the preceding claims, characterized in that the covering body (3) is made of rubber material.

7. The reinforcement cord construction according to any of claims 2 to 6, characterized in that the first fiber filaments (4) are made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers.

8. The reinforcement cord construction according to any of claims 3 to 7, characterized in that the second fiber filaments (5) are made of polyester fiber, PBO fiber, aramid fiber, carbon fiber or other high-strength synthetic fibers.

9. The reinforcement cord construction according to any of claims 3 to 8, characterized in that the first fiber filaments (4) and the second fiber filaments (5) have gone through chemical treatment.

10. Conveyor belt comprising a synthetic fiber cord constructing according to any of the preceding claims.

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