A flexible rock splitting device and a manufacturing method thereof

Abstract

The present invention discloses a flexible rock cracking device and a manufacturing method thereof, wherein the flexible rock cracking device comprises a flexible expansion device, wherein a filling rubber layer is fixedly arranged on the outside of the flexible expansion device, wherein a plurality of spiral springs are inserted into the filling rubber layer, wherein N first steel wire ropes are inserted into the spiral springs, wherein N is an integer greater than or equal to zero, and wherein all the spiral springs and all the first steel wire ropes together constitute a flexible traction layer. The beneficial effects of the present invention are as follows: it has the characteristics of axial bendability and radial high compressive resistance, and while the protection device for local fracture of rock holes is not damaged, it can continue to transmit the cracking force to the rock; it solves the problem that instruments such as splitting guns and splitting rods cannot be inserted when the rock holes are not straight and the apertures are uneven, and solves the problem of instrument damage caused by local fracture of rocks; it can be assembled in any shape and size combination, which simplifies the manufacturing difficulty and reduces the manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of rock splitting devices, and in particular to a flexible rock splitting device and a manufacturing method thereof. Background Art

[0002] In mining, crushing of stone and concrete, splitting of ore and other operations, commonly used rigid rock cracking devices include splitting guns, splitting rods, expanders, etc. Due to the complex rock structure, its fracture is uncontrolled, especially local fractures occur frequently, which can easily lead to the rigid rock cracking device being damaged or unable to be pulled out of the rock hole.

[0003] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0004] In response to the above-mentioned technical problems in the related art, the present invention proposes a flexible rock splitting device, which is flexible as a whole, and solves the problem that splitting guns, splitting rods and other tools cannot be inserted when the rock holes are not straight and the hole diameters are uneven, and solves the problem of tool damage caused by local rock cracks, such as the bending or even breaking of the sliding wedge of the splitting gun, the stuck and unable to reset of the splitting rod plunger, and the local expansion failure of the expander.

[0005] To achieve the above technical objectives, the technical solution of the present invention is implemented as follows:

[0006] A flexible rock cracking device comprises a flexible expansion device, wherein a filling rubber layer is fixedly provided on the outside of the flexible expansion device, a plurality of coil springs are inserted into the filling rubber layer, N first steel wire ropes are inserted into the coil springs, and N is an integer greater than or equal to zero. All the coil springs and all the first steel wire ropes together constitute a flexible traction layer.

[0007] Furthermore, a mesh sleeve is arranged in the filling rubber layer, the mesh sleeve constitutes an anti-wear stretching layer, and the flexible traction layer is located between the anti-wear stretching layer and the flexible expansion device.

[0008] Furthermore, the mesh sleeve is woven by the second steel wire rope, and the weaving process adopts warp knitting or weft knitting.

[0009] Furthermore, a plurality of rows of the coil springs are arranged at intervals in a direction away from the flexible expansion device, and each row of the coil springs includes a plurality of the coil springs.

[0010] Furthermore, in each row of the coil springs, two adjacent coil springs are spaced apart from each other, and each coil spring has one first steel wire rope inserted therein. Alternatively, in each row of the coil springs, two adjacent coil springs overlap each other and the overlapped portion of the two coil springs forms a bite channel, and a bite steel wire rope is inserted therein, and the first steel wire rope is inserted only in the coil springs at the head and tail ends of each row of the coil springs.

[0011] Furthermore, the pitch of the coil spring is equal to 1.15 times the wire diameter of the coil spring.

[0012] Furthermore, the filling rubber layer is made of rubber material or thermoplastic elastomer material.

[0013] The present invention also provides a method for manufacturing a flexible rock cracking device, comprising the following steps:

[0014] S1 cuts a plurality of spiral springs and a plurality of first steel wire ropes and sets them aside for use;

[0015] S2: After N first steel wire ropes are inserted into each of the coil springs, a first assembly is formed, where N is an integer greater than or equal to zero;

[0016] S3: mounting a plurality of the first components on the outside of the flexible expansion device to form a second component;

[0017] S4 placing the second component in a mold and injecting a rubber material or a thermoplastic elastomer material;

[0018] S5 demoulding after vulcanization or demoulding after curing.

[0019] Furthermore, in S4, the outer part of the second component is first covered with a mesh sleeve to form a third component, and then the third component is placed in the mold. The mesh sleeve is woven online or pre-woven by a second steel wire rope, and the weaving process adopts warp knitting or weft knitting.

[0020] The beneficial effects of the present invention are as follows: it has the characteristics of axial bendability and radial high compressive resistance, and while the protection device for local fracture of rock holes is not damaged, it can continue to transmit cracking force to the rock; it solves the problem that splitting guns, splitting rods and other instruments cannot be inserted when the rock holes are not straight and the hole diameters are uneven, and solves the problem of instrument damage caused by local fracture of rocks; it can be assembled in any shape and size, which simplifies the manufacturing difficulty and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a front cross-sectional view of a flexible rock splitting device according to an embodiment of the present invention;

[0023] Figure 2 is a side cross-sectional view of a flexible rock cracking device according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of an anti-wear tensile layer according to an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a first component according to an embodiment of the present invention;

[0026] Figure 5 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 1 ;

[0027] Figure 6 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 2 ;

[0028] Figure 7 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 3 ;

[0029] Figure 8 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 4 ;

[0030] Fig. 9 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 5 ;

[0031] Fig.10 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 6 ;

[0032] Fig.11 is a cross-section of the flexible traction layer according to an embodiment of the present invention Figure 7 ;

[0033] Fig.12 Schematic diagram of a coil spring according to an embodiment of the present invention.

[0034] In the figure:

[0035] 1. Flexible expansion device; 2. Flexible traction layer; 3. Anti-wear tensile layer; 4. Filling rubber layer; 5. Coil spring; 6. First steel wire rope; 7. Biting steel wire rope; 8. Liquid inlet joint; 9. Connecting joint. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0037] like Figure 1-12 As shown, a flexible rock cracking device according to an embodiment of the present invention includes a flexible expansion device 1, a filling rubber layer 4 is fixedly provided on the outside of the flexible expansion device 1, a plurality of coil springs 5 ​​are inserted into the filling rubber layer 4, N first steel wire ropes 6 are inserted into the coil springs 5, N is an integer greater than or equal to zero, and all the coil springs 5 ​​and all the first steel wire ropes 6 together constitute a flexible traction layer 2.

[0038] In a specific embodiment of the present invention, a mesh sleeve is provided in the filling rubber layer 4 , the mesh sleeve constitutes the anti-wear stretch layer 3 , and the flexible traction layer 2 is located between the anti-wear stretch layer 3 and the flexible expansion device 1 .

[0039] In a specific embodiment of the present invention, the mesh sleeve is woven by the second steel wire rope, and the weaving process adopts warp knitting or weft knitting.

[0040] In a specific embodiment of the present invention, a plurality of rows of the coil springs 5 ​​are arranged at intervals in a direction away from the flexible expansion device 1 , and each row of the coil springs 5 ​​includes a plurality of the coil springs 5 ​​.

[0041] In a specific embodiment of the present invention, in each row of the coil springs 5, two adjacent coil springs 5 ​​are spaced apart from each other, and a first steel wire rope 6 is inserted into each coil spring 5. Alternatively, in each row of the coil springs 5, two adjacent coil springs 5 ​​overlap each other and a bite channel is formed at the overlap of the two, and a bite steel wire rope 7 is inserted into the bite channel, and the first steel wire rope 6 is inserted only into the coil springs 5 ​​at the head and tail ends of each row of the coil springs 5.

[0042] In a specific embodiment of the present invention, the pitch of the coil spring 5 is equal to 1.15 times the wire diameter of the coil spring 5 .

[0043] In a specific embodiment of the present invention, the filling rubber layer 4 is made of rubber material or thermoplastic elastomer material.

[0044] The present invention also provides a method for manufacturing a flexible rock cracking device, comprising the following steps:

[0045] S1 cuts a plurality of coil springs 5 ​​and a plurality of first steel wire ropes 6 for use;

[0046] S2: After N first steel wire ropes 6 are inserted into each of the coil springs 5, a first assembly is formed, where N is an integer greater than or equal to zero;

[0047] S3: mounting a plurality of the first components on the outside of the flexible expansion device 1 to form a second component;

[0048] S4 placing the second component in a mold and injecting a rubber material or a thermoplastic elastomer material;

[0049] S5 demoulding after vulcanization or demoulding after curing.

[0050] In a specific embodiment of the present invention, in S4, the outside of the second component is first covered with a mesh sleeve to form a third component, and then the third component is placed in the mold. The mesh sleeve is woven online or pre-woven by a second steel wire rope, and the weaving process adopts warp knitting or weft knitting.

[0051] In order to facilitate understanding of the above technical solutions of the present invention, the above technical solutions of the present invention are described in detail below through specific usage methods.

[0052] The flexible rock cracking device of the present invention comprises a flexible expansion device 1, a flexible traction layer 2, an anti-wear stretching layer 3 and a filling rubber layer 4.

[0053] The flexible expansion device 1 adopts the flexible expansion device in the prior art (such as the patent with patent number CN111070519A). The flexible expansion device 1 can be purchased or made by yourself. One end of the flexible expansion device 1 has a through liquid inlet joint 8 for liquid inlet and liquid discharge, and the other end of the flexible expansion device 1 has a plugged connection joint 9.

[0054] The filling rubber layer 4 is used to fix the flexible traction layer 2 and the anti-wear stretching layer 3 on the outside of the flexible expansion device 1. The filling rubber layer 4 can be made of rubber, thermoplastic elastomer and other materials, such as nitrile rubber, polyurethane, casting prepolymer and the like.

[0055] The wear-resistant tensile layer 3 is used to improve the overall wear resistance. The wear-resistant tensile layer 3 is a mesh sleeve woven from the second steel wire rope. The mesh sleeve is cylindrical and can be pre-woven or woven online during the production process. The weaving process adopts warp knitting or weft knitting.

[0056] The flexible traction layer 2 includes multiple rows of first components arranged at intervals, each row of first components includes a plurality of first components, and the first component is composed of a coil spring 5 and a plurality of first steel wire ropes 6. The first steel wire rope 6 is inserted into the coil spring 5. Such a structure ensures that the wire bundle of the first steel wire rope 6 will not spread out or deform when squeezed, and has the characteristic of axial bending while maintaining its shape. The flexible traction layer 2 utilizes the high-strength tensile property of the first steel wire rope 6, while also having the bendable property. It also utilizes the spiral structure of the coil spring 5 to combine with the first steel wire rope 6, so that when the first component is squeezed, it can ensure that the wire bundle of the first steel wire rope 6 will not spread out, and the coil spring 5 also has the bendable property.

[0057] In order to ensure that the flexible traction layer 2 does not cause structural abnormalities under extreme use conditions, two adjacent coil springs 5 ​​in each row of coil springs 5 ​​can be overlapped with each other, and a bite channel will be formed at the overlap of the two. After the bite wire rope 7 is inserted into the bite channel, the two adjacent first components can be bitten together, so that they will not separate under the condition of radial tension. When multiple coil springs 5 ​​are bitten into a row in sequence, if the remaining space in the coil spring 5 located in the middle of each row is not enough to put the first wire rope 6, the first wire rope 6 can also be placed in the coil spring 5.

[0058] In order to ensure that the coil spring 5 can normally engage with other coil springs 5 ​​, the coil spring 5 needs to maintain a certain pitch, and the calculation formula is: t=1.15d, t is the pitch of the coil spring 5, and d is the wire diameter of the coil spring 5.

[0059] The flexible traction layer 2 can be divided into two symmetrical parts, and the flexible expansion device 1 is located between the two parts. Since each part is formed by a combination of multiple first components, the composition and cross-sectional shape of each part can be adjusted arbitrarily. For example, first components with different diameters can be arranged and combined, and the cross-sectional shape can be semicircular, T-shaped, triangular, trapezoidal, etc. When the cross-sectional shapes of the two parts are both made into semicircular shapes, the rock can be cracked; when they are both made into T-shaped or triangular shapes, the rock holes can be broken through; when they are both made into trapezoidal shapes, the rock can be pushed, etc.

[0060] The steps for making the flexible rock cracking device are as follows:

[0061] 1) Calculate the dimensions of the flexible expansion device 1, the coil spring 5, the first steel wire rope 6 and other components according to the requirements;

[0062] 2) purchasing or making a flexible expansion device 1 of required size for standby use;

[0063] 3) cutting the plurality of coil springs 5 ​​and the plurality of first steel wire ropes 6 into required sizes for standby use;

[0064] 4) Insert N first steel wire ropes 6 into each of the coil springs 5 ​​cut in the previous step and assemble them into a first assembly for standby use, where N is an integer greater than or equal to zero (i.e., some coil springs 5 ​​do not have the first steel wire rope 6 inserted into them);

[0065] 5) All the first components assembled in the previous step are installed above and below the flexible expansion device 1 in a certain combination arrangement to form a second component;

[0066] 6) On the outside of the second component assembled in the previous step, assemble the third component by weaving online or directly putting on the pre-woven mesh sleeve;

[0067] 7) Place the third component assembled in the previous step into the mold;

[0068] 8) Filling polyurethane into the mold to make the filling rubber layer 4. If other materials (such as rubber) are used, just fill the material into the mold;

[0069] 9) Demoulding after curing. If rubber material is used, demoulding after vulcanization;

[0070] 10) After vulcanization to the maximum strength, the flexible rock cracking device can be completed;

[0071] 11) The manufactured flexible rock cracking device is tested and put into storage.

[0072] To sum up, with the help of the above-mentioned technical scheme of the present invention, the device has the characteristics of axial bendability and radial high compressive resistance. While the protection device for local fracture of rock holes is not damaged, it can continue to transmit cracking force to the rock; it solves the problem that splitting guns, splitting rods and other instruments cannot be inserted when the rock holes are not straight and the hole diameters are uneven, and solves the problem of instrument damage caused by local fracture of rocks; it can be assembled in any shape and size, which simplifies the production difficulty and reduces the manufacturing cost.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible rock cracking device, characterized in that: The invention comprises a flexible expansion device (1), wherein a filling rubber layer (4) is fixedly provided on the outside of the flexible expansion device (1), wherein a plurality of coil springs (5) are inserted into the filling rubber layer (4), wherein N first steel wire ropes (6) are inserted into the coil spring (5), wherein N is an integer greater than or equal to zero, wherein all the coil springs (5) and all the first steel wire ropes (6) together constitute a flexible traction layer (2), wherein a mesh sleeve is provided in the filling rubber layer (4), wherein the mesh sleeve constitutes an anti-wear tensile layer (3), and wherein the flexible traction layer (2) is located within the anti-wear tensile layer. (3) and the flexible expansion device (1), a plurality of rows of the coil springs (5) are arranged at intervals in a direction away from the flexible expansion device (1), each row of the coil springs (5) comprises a plurality of the coil springs (5), in each row of the coil springs (5), two adjacent coil springs (5) overlap each other and a bite channel is formed at the overlapped portion of the two, a bite steel wire rope (7) is passed through the bite channel, and the first steel wire rope (6) is passed through only the coil springs (5) at the head and tail ends of each row of the coil springs (5).

2. The flexible rock cracking device according to claim 1, characterized in that: The mesh sleeve is woven by the second steel wire rope, and the weaving process adopts warp knitting or weft knitting.

3. The flexible rock cracking device according to claim 1, characterized in that: The pitch of the coil spring (5) is equal to 1.15 times the wire diameter of the coil spring (5).

4. The flexible rock cracking device according to claim 1, characterized in that: The filling rubber layer (4) is made of rubber material or thermoplastic elastomer material.

5. A method for manufacturing a flexible rock cracking device according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1 cuts a plurality of coil springs (5) and a plurality of first steel wire ropes (6) for use; S2: inserting N first steel wire ropes (6) into each of the coil springs (5) to form a first assembly, where N is an integer greater than or equal to zero; S3: installing a plurality of the first components on the outside of the flexible expansion device (1) to form a second component; S4 placing the second component in a mold and injecting a rubber material or a thermoplastic elastomer material; S5 demoulding after vulcanization or demoulding after curing.

6. The method for manufacturing the flexible rock cracking device according to claim 5, characterized in that: In S4, the outer part of the second component is first covered with a mesh sleeve to form a third component, and then the third component is placed in the mold. The mesh sleeve is woven online or pre-woven by a second steel wire rope, and the weaving process adopts warp knitting or weft knitting.

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