A mine drilling rig chain dismounting device

Abstract

This utility model relates to a chain disassembly device for a mining drilling rig, belonging to the field of mining disassembly and assembly equipment. It includes a base plate (1), a pressure plate (7), an upper pressure sleeve (6), a lower pressure sleeve (5), and a lifting component (9). A screw (3) is provided on the base plate (1), and support plates (2) are provided on both sides of the screw (3). The pressure plate (7) passes through the screw (3) and is secured by a nut (8). The upper pressure sleeve (6) is U-shaped, and the lower pressure sleeve (5) has two through holes. The cylinder end of the lifting component (9) is connected to the lower end of the pressure plate (7), and the rod end is connected to the outer bottom of the upper pressure sleeve (6). The two open ends of the upper pressure sleeve (6) pass through the lower pressure sleeve (5). The lower pressure sleeve (5) axially positions the open end of the upper pressure sleeve (6) with the chain (4) pin placed on the support plate (2). The lifting component (9) presses down on the upper pressure sleeve (6) to disengage the pin. This addresses the problems of traditional hammering methods for disassembly, which are labor-intensive, time-consuming, and risky.

Description

Technical Field

[0001] This utility model relates to a chain disassembly device for mining drilling rigs, belonging to the field of mining disassembly and assembly equipment. Background Technology

[0002] The KY-250D roller cone drill is the main equipment for mine drilling and blasting in our factory. The lifting chain, as a crucial transmission component of the roller cone drill, mainly consists of inner chain plates, outer chain plates, pins, bushings, and rollers. The inner chain plates and bushings are tightly interference-fitted, ensuring a stable connection; the outer chain plates and pins also use an interference fit, enhancing the overall structural strength. The rollers and bushings are designed with a clearance fit, allowing the rollers to rotate freely relative to the bushings. When the chain engages with the sprockets, the rotation of the rollers greatly reduces the coefficient of friction between them, effectively minimizing wear.

[0003] However, as rotary drilling rigs continue to be produced, the chains gradually wear out, deform, and break, requiring the replacement of one or more damaged links. The new chains in the warehouse are purchased in batches, not individually, necessitating the removal of the required links from the entire batch. Since rotary drilling rig chains are heavy-duty, there are currently no specialized disassembly tools available. Previously, disassembly was done manually, requiring two people to work together, using a hammer to remove the chain. This method was labor-intensive, time-consuming, and carried a high risk of injury from the impact. Utility Model Content

[0004] The technical problem this invention aims to solve is that traditional hammering methods for disassembly are labor-intensive, time-consuming, and risky.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a chain disassembly device for a mining drilling rig, including a base plate, a pressure plate, an upper pressure sleeve, a lower pressure sleeve, and a lifting component. The base plate is provided with screws at intervals, and support plates are provided on both sides of the screw connection line. The pressure plate passes through the screws and is fastened by nuts. The upper pressure sleeve has a U-shaped structure, and the lower pressure sleeve is provided with two through holes at intervals. The cylinder end of the lifting component is connected to the lower end face of the pressure plate, and the rod end is in contact with the outer bottom surface of the upper pressure sleeve. The two open ends of the upper pressure sleeve pass through the through holes on the lower pressure sleeve.

[0006] The support plate in the above-mentioned device has a U-shaped opening at its upper end.

[0007] In the aforementioned device, the pressure plate is provided with through holes at intervals, so that the pressure plate passes through the screw.

[0008] Furthermore, the pressure plate in the above-mentioned device is provided with nuts at both the upper and lower ends, and the nuts are threadedly connected to the screw rod.

[0009] The upper pressure sleeve in the above-mentioned device includes a fixed plate and an ejector pin, and the ejector pin is spaced apart on the fixed plate.

[0010] Furthermore, the lower pressure sleeve in the above-mentioned device includes a connecting plate and a limiting cylinder, the through hole is opened on the connecting plate, and the limiting cylinder is disposed at the through hole.

[0011] Furthermore, in the aforementioned device, the diameter of the ejector pin is 0.7 to 0.9 times the diameter of the chain pin, and the diameter of the through hole at the limiting cylinder and the connection is 1.1 to 1.3 times the diameter of the chain pin.

[0012] The lifting component in the above-mentioned device is a detachable jack.

[0013] In the aforementioned device, the screw and base plate, as well as the support plate and base plate, are all fixed by welding.

[0014] The base plate and pressure plate in the above-mentioned device are both made of Q345-D steel plate with a thickness of 16mm.

[0015] The beneficial effects of this utility model are: the structure is simple, the manufacturing cost is low, and the operation is convenient. It is highly effective when applied to the disassembly of chains in mining drilling rigs. This device uses a lower pressure sleeve to axially position the open end of the upper pressure sleeve against the chain pin placed on the support plate, and the lifting component presses down on the upper pressure sleeve to disengage the pin. This structural design improves chain safety and speed of disassembly, greatly increasing disassembly efficiency and reducing disassembly time. It also significantly reduces the labor intensity and safety risks for maintenance personnel, achieving a rapid method for handling and replacing chain faults, and increasing the effective operating time of the mining equipment. Furthermore, this device is lightweight, flexible, and portable, and can be used in both the mining site and maintenance workshop, and is safe and reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the left-side structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the upper pressure sleeve structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the lower pressure sleeve structure of this utility model.

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the lower pressure sleeve of this utility model.

[0023] Attached reference numerals: 1 is base plate, 2 is support plate, 3 is screw, 4 is chain, 5 is lower pressure sleeve, 51 is connecting plate, 52 is limiting cylinder, 6 is upper pressure sleeve, 61 is fixing plate, 62 is ejector pin, 7 is pressure plate, 8 is nut, and 9 is lifting component. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1 to 7 As shown, this utility model discloses a chain disassembly device for a mining drilling rig, comprising a base plate 1, a pressure plate 7, an upper pressure sleeve 6, a lower pressure sleeve 5, and a lifting component 9. The base plate 1 is provided with spaced-apart screws 3, and support plates 2 are provided on both sides of the connecting lines of the screws 3. The pressure plate 7 passes through the screws 3 and is secured by nuts 8. The upper pressure sleeve 6 has a U-shaped structure, and the lower pressure sleeve 5 has two spaced-apart through holes. The cylinder end of the lifting component 9 is connected to the lower end face of the pressure plate 7, and the rod end is in contact with the outer bottom surface of the upper pressure sleeve 6. The two open ends of the upper pressure sleeve 6 pass through the through holes in the lower pressure sleeve 5. Those skilled in the art will understand that this device uses the lower pressure sleeve 5 to axially position the open end of the upper pressure sleeve 6 against the chain 4 pin placed on the support plate 2. The lifting component 9 presses down on the upper pressure sleeve 6, causing the open end of the upper pressure sleeve 6 to directly push out the pin, thus disengaging the pin. Therefore, the diameter of the opening end of the upper pressure sleeve 6 of this device should be smaller than the diameter of the pin, and the diameter of the through hole of the lower pressure sleeve 5 should be larger than the diameter of the pin. The main structure of this device includes a base plate 1, a support plate 2, screws 3, and a pressure plate 7. The screws 3 are spaced apart on the base plate 1, preferably two screws. The pressure plate 7 passes through the upper part of the screws 3 and is fixed to the upper part of the screws 3 by nuts 8. The pressure plate 7 can preferably be moved to an appropriate position along the axial direction of the screws 3 and then fixed by nuts 8. The support plate is mainly used to support the placement of the chain 4. It can be set on both sides of the line connecting the two screws 3, and the spacing can be adjusted according to the length of a single chain 4. The lower pressure sleeve 5 is mainly used to achieve axial positioning of the opening end of the upper pressure sleeve 6 and the pin of the chain 4. The chain 4 is placed on the two support plates 2, and then the two through holes of the lower pressure sleeve 5 are clamped on the two pins. The two opening ends of the upper pressure sleeve 6 are then inserted into the through holes. The lifting component 9 is positioned at the upper end of the pressure plate 7, and its lower end acts on the upper pressure sleeve 6 to axially press the upper pressure sleeve 6 down until the pin is pushed out from the chain 4.

[0026] Preferably, the upper end of the support plate 2 in the above-mentioned device has a U-shaped opening. Those skilled in the art will understand that, in order to facilitate the positioning of the chain 4 in the width direction, this device preferably has a U-shaped opening at the upper end of the support plate 2. In practice, the U-shaped opening prevents the chain 4 from swinging excessively during downward pressure, thus avoiding any impact on positioning.

[0027] Preferably, the pressure plate 7 in the above-mentioned device is provided with through holes at intervals, so that the pressure plate 7 passes through the screw 3. Those skilled in the art will understand that, in order to facilitate the positioning of the pressure plate 7, this device preferably provides through holes at intervals on the pressure plate 7, so that the pressure plate 7 can directly pass through the through holes onto the screw 3, and the pressure plate 7 is fixed to the screw 3 by the nut 8. Furthermore, the number and verticality of the through holes on the pressure plate 7 should correspond to the number and position of the screw 3.

[0028] Preferably, in the above-described device, both the upper and lower ends of the pressure plate 7 are provided with nuts 8, and the nuts 8 are threadedly connected to the screw rod 3. Those skilled in the art will understand that, in order to facilitate the fixing of the pressure plate 7 to the screw rod 3 while ensuring the structural strength of the connection, this device preferably provides nuts 8 at both the upper and lower ends of the pressure plate 7, and the nuts 8 are threadedly connected to the screw rod 3. This structural arrangement also allows the pressure plate 7 to move axially along the screw rod 3 through the double nut 8 design, facilitating the adjustment of the height of the pressure plate 7.

[0029] Preferably, the upper pressure sleeve 6 in the above-mentioned device includes a fixed plate 61 and ejector pins 62, with the ejector pins 62 spaced apart on the fixed plate 61. Those skilled in the art will understand that the preferred structure of the upper pressure sleeve 6 specifically includes a fixed plate 61 and ejector pins 62, with the ejector pins 62 spaced apart on the fixed plate 61. Since the ejector pins 62 directly contact the pins of the chain 4, the distance between the two ejector pins 62 should be equal to the distance between the pins on the chain 4, and the diameter of the ejector pins 62 should be smaller than the diameter of the pins on the chain 4. In practice, the upper pressure sleeve 6 can preferably be made from a chain plate with pins previously removed from the chain 4, after the pins have been ground.

[0030] Preferably, the lower pressure sleeve 5 in the above-mentioned device includes a connecting plate 51 and a limiting cylinder 52. The through hole is opened on the connecting plate 51, and the limiting cylinder 52 is disposed at the through hole. Those skilled in the art will understand that the lower pressure sleeve 5 of this device is a component for positioning the ejector pin 62 and the pin shaft. In practice, the lower pressure sleeve 5 preferably includes a connecting plate 51 and a limiting cylinder 52. The original through hole was opened on the connecting plate 51. In practice, the lower pressure sleeve 5 can preferably be made by grinding the hole diameter of a perforated chain plate previously removed from the chain 4 and then welding the limiting cylinder 52. At the same time, in order to achieve the positioning of the ejector pin 62 and the pin shaft axis, it is preferred that the limiting cylinder 52 is disposed at the two through holes, that is, the ends of the ejector pin 62 and the pin shaft are both inserted into the limiting cylinder 52.

[0031] Preferably, in the above-mentioned device, the diameter of the ejector pin 62 is 0.7 to 0.9 times the diameter of the chain 4 pin, and the diameter of the limiting cylinder 52 and the through hole at the connection is 1.1 to 1.3 times the diameter of the chain 4 pin. Those skilled in the art will understand that, in order to ensure that the ejector pin 62 ejects the pin from the chain 4 without damage, this device further preferably has the following diameter relationships: the ejector pin 62, the limiting cylinder 52, the through hole, and the pin. Specifically, the diameter of the ejector pin 62 is 0.7 to 0.9 times the diameter of the chain 4 pin, and the diameter of the limiting cylinder 52 and the through hole at the connection is 1.1 to 1.3 times the diameter of the chain 4 pin. That is, the inner diameter of the limiting cylinder 52 is equal to the inner diameter of the through hole and is 1.1 to 1.3 times the diameter of the chain 4 pin.

[0032] Preferably, the lifting component 9 in the above-described device is a detachable jack. Those skilled in the art will understand that the lifting component 9 is an adjustable-length telescopic device, and is preferably an electric telescopic rod or a hydraulic cylinder, etc. For ease of assembly, the lifting component 9 is preferably a detachable jack.

[0033] Preferably, in the above-described device, the screw 3 and the base plate 1, and the support plate 2 and the base plate 1 are all fixed by welding. Those skilled in the art will understand that, in order to ensure the structural strength of the device, it is preferable that the screw 3 and the base plate 1, and the support plate 2 and the base plate 1 are all fixed by welding.

[0034] Preferably, the base plate 1 and pressure plate 7 in the above-mentioned device are both made of Q345-D steel plate with a thickness of 16mm. Those skilled in the art will understand that, in order to ensure the structural strength of the device, it is practically preferred that the base plate 1 and pressure plate 7 be made of Q345-D steel plate with a thickness of 16mm, while the screw 3 and nut 8 are made of high-strength fasteners, and the support plate 2 can also be made from disassembled chain plates, which can reduce manufacturing costs. Example

[0035] Two rectangular steel plates are processed using an oxyacetylene flame. One plate serves as the base plate 1 (140mm long, 120mm wide), and the other as the pressure plate 7 (140mm long, 130mm wide). A high-strength M20mm screw rod 3 is welded to the center point of each end of the base plate 1, with a height of 230mm and vertically positioned. The upper ends of the two high-strength screw rods 3 should have at least a 100mm threaded section. Two high-strength M20mm nuts 8 are fitted on the screw rods, with a relative distance of 85mm between them. A support plate 2 is welded to each side of the line connecting the two screw rods 3, with a height of approximately 80mm and a length of approximately 76mm. This ensures sufficient height and width for disassembling the lifting chain 4. A Φ21mm through hole is drilled at the center point of each end of the pressure plate 7 to allow the pressure plate 7 to pass through the screw rod 3 and be fixed to the upper part of the screw rod 3 by the nuts 8.

[0036] The chain 4 to be disassembled is passed through the two screws 3 and placed horizontally. The pin of the chain 4 to be disassembled is kept between the two support plates 2 below the device, and the pin of the chain plate to be disassembled must be placed in the effective space between the support plates 2 to ensure that the pin can be pressed out smoothly. Then, a lower pressure sleeve 5 is placed along the placement direction of the chain 4, and the limiting sleeve 52 of the lower pressure sleeve 5 is fitted on the two adjacent pins of the chain 4 to be disassembled. The positioning pin 62 of the upper pressure sleeve 6 is inserted into the limiting sleeve 52 on the lower pressure sleeve 5 to achieve vertical alignment between the positioning pin 62 and the two pins of the chain 4 to be disassembled. Then, the lifting part 9 is placed horizontally on the upper pressure sleeve 6, and the pressure plate 7 is placed on the lifting part 9. The two nuts 8 are tightened with a wrench. Finally, the hydraulic mechanism of the lifting part 9 is operated to safely and quickly press out the pin of the chain 4, completing the disassembly of the chain 4.

Claims

1. A chain disassembly device for a mining drilling rig, characterized in that: The device includes a base plate (1), a pressure plate (7), an upper pressure sleeve (6), a lower pressure sleeve (5), and a lifting component (9). The base plate (1) is provided with screws (3) spaced apart. Support plates (2) are provided on both sides of the line connecting the screws (3). The pressure plate (7) passes through the screws (3) and is fastened by nuts (8). The upper pressure sleeve (6) has a U-shaped structure. The lower pressure sleeve (5) is provided with two through holes spaced apart. The cylinder end of the lifting component (9) is connected to the lower end face of the pressure plate (7), and the rod end is in contact with the outer bottom surface of the upper pressure sleeve (6). The two open ends of the upper pressure sleeve (6) pass through the through holes on the lower pressure sleeve (5).

2. The chain disassembly device for a mining drilling rig according to claim 1, characterized in that: The upper end of the support plate (2) is provided with a U-shaped opening.

3. The chain disassembly device for a mining drilling rig according to claim 1, characterized in that: The pressure plate (7) is provided with through holes at intervals, so that the pressure plate (7) passes through the screw (3).

4. The chain disassembly device for a mining drilling rig according to claim 3, characterized in that: The pressure plate (7) is provided with nuts (8) at both the upper and lower ends, and the nuts (8) are threaded onto the screw (3).

5. A chain disassembly device for a mining drilling rig according to claim 1, characterized in that: The upper pressure sleeve (6) includes a fixed plate (61) and ejector pins (62), with the ejector pins (62) spaced apart on the fixed plate (61).

6. The chain disassembly device for a mining drilling rig according to claim 5, characterized in that: The lower pressure sleeve (5) includes a connecting plate (51) and a limiting cylinder (52). The through hole is opened on the connecting plate (51), and the limiting cylinder (52) is set at the through hole.

7. A chain disassembly device for a mining drilling rig according to claim 6, characterized in that: The diameter of the ejector pin (62) is 0.7 to 0.9 times the diameter of the chain (4) pin, and the diameter of the limiting cylinder (52) and the through hole at the connection is 1.1 to 1.3 times the diameter of the chain (4) pin.

8. A chain disassembly device for a mining drilling rig according to claim 1, characterized in that: The lifting component (9) is a detachable jack.

9. A chain disassembly device for a mining drilling rig according to claim 1, characterized in that: The screw (3) and base plate (1), and the support plate (2) and base plate (1) are all fixed by welding.

10. A chain disassembly device for a mining drilling rig according to claim 1, characterized in that: Both the base plate (1) and the pressure plate (7) are made of Q345-D steel plate with a thickness of 16mm.

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