A structure of an extra-long assembled cooler for a coal mining machine rocker arm

Abstract

This utility model discloses an extra-long assembled cooler structure for a coal mining machine rocker arm, including a heat dissipation pipe and two fixing sleeves. The heat dissipation pipe includes a heat dissipation pipe section and two installation pipe sections. A stop step is provided at the end of the installation pipe section away from the heat dissipation pipe section. The fixing sleeve includes a fixing sleeve and a fixing plate, and a stop step hole that mates with the stop step is provided in the channel of the fixing sleeve. This utility model, by making the cooler structure a bidirectional symmetrical interface design, eliminates the distinction between the inlet and outlet ends, allowing direct insertion into the installation hole during installation. This reduces the operational steps required for direction confirmation and adjustment, greatly simplifying the maintenance process. Simultaneously, due to the bidirectional symmetrical interface design, quick assembly and disassembly of the coal mining machine rocker arm can be achieved in situ without disassembling the rocker arm, reducing the time spent working at height and lowering the probability of safety accidents caused by improper operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mining machine rocker arm cooler, and in particular relates to a structure of an ultra-long assembled cooler for a coal mining machine rocker arm. Background Technology

[0002] When the existing extra-long rocker arm cooler unit of a coal mining machine malfunctions, it must be disassembled from the joint between the rocker arm and the traction unit, requiring a complex process of "disassembling the entire rocker arm → removing the connecting frame fixed by the super nut → replacing the cooler." Due to the narrow space in coal mine working faces, the operation is difficult and requires a significant investment of manpower and resources, with each maintenance session taking several hours. Furthermore, frequent disassembly of the rocker arm can lead to a decrease in the overall machine's precision and affect its lifespan. In addition, the cooler's installation direction is fixed, relying on the connecting frame for positioning, and lacks an independent disassembly and assembly path. Therefore, the efficient disassembly and assembly of the extra-long rocker arm cooler of a coal mining machine is a pressing problem that urgently needs to be solved to improve the maintenance efficiency of the rocker arm. Utility Model Content

[0003] The technical problem this utility model aims to solve is to address the shortcomings of the existing technology by providing an extra-long assembled cooler structure for a coal mining machine rocker arm. By dividing the cooler structure into heat dissipation pipes and two symmetrically arranged fixing sleeves at both ends of the heat dissipation pipes, this cooler structure features a bidirectional symmetrical interface design. It eliminates the need to distinguish between the inlet and outlet ends, allowing for direct insertion into the mounting holes during installation without repeated orientation checks. This reduces operational steps associated with orientation confirmation and adjustment, greatly simplifying the maintenance process. Furthermore, the bidirectional symmetrical interface design enables quick assembly and disassembly of the coal mining machine rocker arm in its original position, eliminating the need to disassemble the rocker arm and reducing the time spent working at height. This significantly reduces the safety risks associated with working at height and lowers the probability of accidents caused by improper operation. In addition, the optimized installation direction of this cooler structure increases its versatility, making it compatible with various models and operating conditions of coal mining machines. This reduces the need for customized maintenance and improves the versatility and convenience of maintenance work.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an ultra-long assembled cooler structure for a coal mining machine rocker arm, including a heat dissipation pipe passing through the rocker arm of the coal mining machine and two fixing sleeves symmetrically arranged at both ends of the heat dissipation pipe and positioning the heat dissipation pipe. The heat dissipation pipe and the fixing sleeves are snap-fitted together, and the fixing sleeves are installed in the rocker arm of the coal mining machine by connecting bolts.

[0005] The heat dissipation pipe includes a heat dissipation pipe section and two mounting pipe sections symmetrically arranged at the ends of the heat dissipation pipe section. The heat dissipation pipe section and the mounting pipe sections are integrally formed. A stop step is provided at the end of the mounting pipe section away from the heat dissipation pipe section.

[0006] The fixing sleeve includes a fixing sleeve fitted onto the end of the installation pipe section and a fixing plate disposed on the fixing sleeve away from the end of the heat dissipation pipe section. The fixing sleeve and the fixing plate are integrally formed. The middle part of the fixing sleeve and the fixing plate is provided with a channel communicating with the interior of the installation pipe section. The channel of the fixing sleeve is provided with a stop step hole that cooperates with the stop step.

[0007] Furthermore, the heat dissipation pipe section consists of four identical heat dissipation pipe segments. The four heat dissipation pipe segments are connected by a connecting sleeve, and the heat dissipation pipe segments and the connecting sleeve are welded together. Two adjacent heat dissipation pipe segments are welded together. Among the four heat dissipation pipe segments, the central axes of the two upper heat dissipation pipe segments are parallel and their interiors are connected. The central axes of the two lower heat dissipation pipe segments are parallel and their interiors are connected. The interior of the installation pipe section is hollow. The interiors of the two upper heat dissipation pipe segments are connected to the interior of the installation pipe section, and the interiors of the two lower heat dissipation pipe segments are connected to the interior of the installation pipe section.

[0008] Furthermore, multiple sealing rings are provided at the connection between the installation pipe section and the fixed sleeve; multiple sealing rings are provided at the connection between the fixed sleeve and the rocker arm of the coal mining machine.

[0009] Furthermore, a guide slope is provided at the end of the channel inside the fixed sleeve away from the fixed plate.

[0010] Furthermore, both the heat dissipation pipe section and the mounting pipe section are corrugated metal pipe sections.

[0011] This utility model has the following advantages compared with the prior art:

[0012] 1. This utility model divides the cooler structure into heat dissipation pipes and two symmetrically arranged fixing sleeves at both ends of the heat dissipation pipes, resulting in a bidirectional symmetrical interface design. This eliminates the need to distinguish between the inlet and outlet ends, allowing for direct insertion into the mounting holes during installation without repeated orientation checks. This reduces operational steps associated with orientation confirmation and adjustment, greatly simplifying the maintenance process. Furthermore, the bidirectional symmetrical interface design enables quick assembly and disassembly of the coal mining machine's rocker arm in its original position, eliminating the need to disassemble the rocker arm and reducing the time spent working at height. This significantly lowers the safety risks associated with working at height and reduces the probability of accidents caused by improper operation. Additionally, the optimized installation direction of this cooler structure increases its versatility, making it compatible with various models and operating conditions of coal mining machines. This reduces the need for customized maintenance and improves the versatility and convenience of maintenance work.

[0013] 2. In this utility model, the heat dissipation pipe and the fixing sleeve are connected by the stop step at the end of the installation pipe section and the stop step hole in the fixing sleeve, and the cooler structure is fixed in the rocker arm of the coal mining machine by connecting bolts to prevent the cooler structure from moving during operation.

[0014] 3. Compared with traditional coolers, this utility model eliminates the traditional fixed flange at the water inlet end and installs fixed sleeves at both ends of the heat dissipation pipe, so that both ends of the heat dissipation pipe have the same specification interface and the internal flow channel is symmetrically arranged; and the interface at the connection point is sealed with a sealing ring, and the compression permanent deformation rate is <20% under the pressure condition of coal cutting coal and rock by the coal mining machine, ensuring the reliability of bidirectional sealing.

[0015] In summary, this utility model, by dividing the cooler structure into heat dissipation pipes and two fixing sleeves symmetrically arranged at both ends of the heat dissipation pipes, presents a bidirectional symmetrical interface design. This eliminates the need to distinguish between the inlet and outlet ends, allowing for direct insertion into the mounting holes during installation without repeated orientation checks. This reduces operational steps associated with orientation confirmation and adjustment, significantly simplifying the maintenance process. Furthermore, the bidirectional symmetrical interface design enables quick assembly and disassembly of the coal mining machine's rocker arm in its original position, eliminating the need to disassemble the rocker arm and reducing the time spent working at height. This greatly reduces the safety risks associated with working at height and lowers the probability of accidents caused by improper operation. Additionally, the optimized installation direction of this cooler structure increases its versatility, making it compatible with various models and operating conditions of coal mining machines. This reduces the need for customized maintenance and improves the universality and convenience of maintenance work.

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the fixing sleeve of this utility model.

[0019] Figure 3 This is a schematic diagram of the heat dissipation pipe of this utility model.

[0020] Figure 4 This is a diagram showing the usage state of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1—Heat pipe; 2—Fixing sleeve; 3—Heat pipe section;

[0023] 4—Installation pipe section; 5—Connecting sleeve; 6—Stop step;

[0024] 7—Fixed sleeve; 8—Fixed plate; 9—Stop step hole;

[0025] 10—Sealing ring; 11—Connecting bracket; 12—Rocker arm planetary head end;

[0026] 13—Guide inclined plane; 14—Coal mining machine rocker arm. Detailed Implementation

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model includes a heat dissipation pipe 1 that passes through the rocker arm 14 of the coal mining machine and two fixing sleeves 2 that are symmetrically arranged at both ends of the heat dissipation pipe 1 and position the heat dissipation pipe 1. The heat dissipation pipe 1 and the fixing sleeves 2 are connected by a snap-fit, and the fixing sleeves 2 are installed in the rocker arm 14 of the coal mining machine by connecting bolts.

[0028] The heat dissipation pipe 1 includes a heat dissipation pipe section 3 and two mounting pipe sections 4 symmetrically arranged at the ends of the heat dissipation pipe section 3. The heat dissipation pipe section 3 and the mounting pipe sections 4 are integrally formed. A stop step 6 is provided at the end of the mounting pipe section 4 away from the heat dissipation pipe section 3.

[0029] The fixing sleeve 2 includes a fixing sleeve 7 sleeved on the end of the installation pipe section 4 and a fixing plate 8 disposed on the end of the fixing sleeve 7 away from the heat dissipation pipe section 3. The fixing sleeve 7 and the fixing plate 8 are integrally formed. The middle part of the fixing sleeve 7 and the fixing plate 8 are provided with a channel communicating with the interior of the installation pipe section 4. The channel of the fixing sleeve 7 is provided with a stop step hole 9 that cooperates with the stop step 6.

[0030] In practical use, by dividing the cooler structure into heat dissipation pipe 1 and two fixing sleeves 2 symmetrically arranged at both ends of the heat dissipation pipe 1, the cooler structure has a bidirectional symmetrical interface design, eliminating the need to distinguish between the inlet and outlet ends. During installation, it can be directly inserted into the mounting hole without repeatedly checking the direction, reducing the operational steps caused by direction confirmation and adjustment, and greatly simplifying the maintenance process. At the same time, due to the bidirectional symmetrical interface design, it is possible to quickly install and remove the coal mining machine rocker arm 14 in its original position without disassembling the coal mining machine rocker arm 14, reducing the time spent working at height, greatly reducing the safety risks associated with working at height, and reducing the probability of safety accidents caused by improper operation. In addition, after the installation direction of this cooler structure is optimized, its versatility is correspondingly increased, thus adapting to various models and working conditions of coal mining machines, reducing the need for customized maintenance, and improving the versatility and convenience of maintenance work.

[0031] The heat dissipation pipe 1 and the fixing sleeve 2 are connected by the stop step 6 at the end of the installation pipe section 4 and the stop step hole 9 in the fixing sleeve 7, and the cooler structure is fixed in the rocker arm 14 of the coal mining machine by connecting bolts to prevent the cooler structure from moving during operation.

[0032] In addition, compared with traditional coolers, the traditional inlet fixed flange is eliminated, and fixed sleeves 2 are installed at both ends of the heat dissipation pipe 1, so that both ends of the heat dissipation pipe 1 have the same specification interface and the internal flow channel is symmetrically arranged; and the connection interface is sealed with sealing ring 10. Under the pressure condition of coal cutting coal and rock by the coal mining machine, the compression permanent deformation rate is <20%, ensuring the reliability of bidirectional sealing.

[0033] It should be noted that the stop step 6 at the end of the installation pipe section 4 has a height of 8mm and a width of 10mm, and mates with the fixing sleeve 2. The fixing sleeve 2 is made of aluminum alloy or cast iron, with an inner surface roughness Ra≤3.2μm. It is fixed inside the coal mining machine rocker arm 14 by M12 connecting bolts, which can prevent the structure of this cooler from moving during operation, i.e., axial displacement ≤0.2mm. One end of the installation pipe section 4 is sleeved on the end of the heat dissipation pipe section 3, and the installation pipe section 4 and the heat dissipation pipe section 3 are welded together. The other end of the installation pipe section 4 away from the heat dissipation pipe section 3 is snapped into the fixing sleeve 2. The fixing plate 8 has connecting holes for the installation of the connecting bolts.

[0034] Specifically, when installing this cooler structure, if Figure 4 As shown, first, a fixing sleeve 2 is installed at the end of the rocker arm 14 of the coal mining machine near the connecting frame 11, and tightened with connecting bolts with a torque of 120 N·m. Next, the heat dissipation pipe 1 is installed. After the heat dissipation pipe 1 and fixing sleeve 2 are snapped together, another fixing sleeve 2 is installed at the end of the planetary head 12 of the rocker arm near the heat dissipation pipe 1, and fixed with connecting bolts. Finally, the connecting frame 11 is reassembled. When disassembling this cooler structure, the fixing sleeve 2 is removed from the planetary head 12 of the rocker arm, allowing for quick disassembly and replacement of the heat dissipation pipe 1 without removing the connecting frame 11, significantly improving maintenance efficiency. Through the overall installation structure upgrade, the cooler can be quickly disassembled and assembled in the original position of the rocker arm, reducing the single maintenance time to less than 30 minutes, saving more than 50% of manpower, reducing downtime losses, lowering maintenance costs, enhancing the cooler's versatility, and adapting to various installation scenarios and coal mining machine models.

[0035] like Figure 1 and Figure 3As shown, in this embodiment, the heat dissipation pipe section 3 consists of four identical heat dissipation pipe segments. The four heat dissipation pipe segments are connected by a connecting sleeve 5. The heat dissipation pipe segments and the connecting sleeve 5 are welded together, and two adjacent heat dissipation pipe segments are welded together. Among the four heat dissipation pipe segments, the central axes of the two upper heat dissipation pipe segments are parallel and their interiors are connected. The central axes of the two lower heat dissipation pipe segments are parallel and their interiors are connected. The interior of the installation pipe section 4 is hollow. The interiors of the two upper heat dissipation pipe segments are connected to the interior of the installation pipe section 4, and the interiors of the two lower heat dissipation pipe segments are connected to the interior of the installation pipe section 4.

[0036] like Figures 1 to 4 As shown, in this embodiment, multiple sealing rings 10 are provided at the connection between the installation pipe section 4 and the fixed sleeve 7; multiple sealing rings 10 are provided at the connection between the fixed sleeve 2 and the coal mining machine rocker arm 14.

[0037] like Figure 2 As shown, in this embodiment, the end of the channel inside the fixed sleeve 7 away from the fixed plate 8 is provided with a guide slope 13.

[0038] In actual use, the guide slope 13 facilitates the installation of the heat dissipation pipe 1 and enables automatic centering of the heat dissipation pipe 1.

[0039] In this embodiment, both the heat dissipation pipe section 3 and the mounting pipe section 4 are corrugated metal pipe sections.

[0040] In actual use, both the heat dissipation pipe section 3 and the installation pipe section 4 are made of corrugated metal pipes. By increasing the surface area of ​​the pipe body, the efficiency is improved by 30%-50% compared to traditional plain pipes, thus enhancing heat exchange efficiency. Furthermore, the distance between the crests and troughs of the corrugated pipe is typically 8mm-12mm, and the pipe wall thickness is 1.5mm-2.0mm, allowing it to withstand high pressure of 10MPa and severe vibrations with an amplitude of ±5mm, such as the conditions encountered when a coal mining machine is cutting coal and rock.

[0041] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A prefabricated cooler structure for an extra-long rocker arm of a coal mining machine, characterized in that: It includes a heat dissipation pipe (1) that passes through the rocker arm (14) of the coal mining machine and two fixing sleeves (2) that are symmetrically arranged at both ends of the heat dissipation pipe (1) and position the heat dissipation pipe (1). The heat dissipation pipe (1) and the fixing sleeves (2) are connected by a snap-fit. The fixing sleeves (2) are installed in the rocker arm (14) of the coal mining machine by connecting bolts. The heat dissipation pipe (1) includes a heat dissipation pipe section (3) and two mounting pipe sections (4) symmetrically arranged at the ends of the heat dissipation pipe section (3). The heat dissipation pipe section (3) and the mounting pipe sections (4) are integrally formed. A stop step (6) is provided at the end of the mounting pipe section (4) away from the heat dissipation pipe section (3). The fixing sleeve (2) includes a fixing sleeve (7) sleeved on the end of the installation pipe section (4) and a fixing plate (8) disposed on the end of the fixing sleeve (7) away from the heat dissipation pipe section (3). The fixing sleeve (7) and the fixing plate (8) are integrally formed. The middle part of the fixing sleeve (7) and the fixing plate (8) are provided with a channel communicating with the interior of the installation pipe section (4). The channel of the fixing sleeve (7) is provided with a stop step hole (9) that cooperates with the stop step (6).

2. The structure of an extra-long assembled cooler for a coal mining machine rocker arm according to claim 1, characterized in that: The heat dissipation pipe section (3) consists of four heat dissipation pipe sections with the same structure. The four heat dissipation pipe sections are connected by a connecting sleeve (5). The heat dissipation pipe sections and the connecting sleeve (5) are welded together. The two heat dissipation pipe sections that are adjacent to each other are welded together. Among the four heat dissipation pipe sections, the central axes of the two heat dissipation pipe sections on the upper side are parallel and the interiors of the two heat dissipation pipe sections are connected. The central axes of the two heat dissipation pipe sections on the lower side are parallel and the interiors of the two heat dissipation pipe sections are connected. The interior of the installation pipe section (4) is hollow. The interiors of the two heat dissipation pipe sections on the upper side are connected to the interior of the installation pipe section (4). The interiors of the two heat dissipation pipe sections on the lower side are connected to the interior of the installation pipe section (4).

3. The structure of an extra-long assembled cooler for a coal mining machine rocker arm according to claim 1, characterized in that: Multiple sealing rings (10) are provided at the connection between the installation pipe section (4) and the fixed sleeve (7); multiple sealing rings (10) are provided at the connection between the fixed sleeve (2) and the coal mining machine rocker arm (14).

4. The structure of an extra-long assembled cooler for a coal mining machine rocker arm according to claim 1, characterized in that: The end of the channel inside the fixed sleeve (7) away from the fixed plate (8) is provided with a guide slope (13).

5. The structure of an extra-long assembled cooler for a coal mining machine rocker arm according to claim 1, characterized in that: Both the heat dissipation pipe section (3) and the installation pipe section (4) are corrugated metal pipe sections.

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