Safety pressure relief and oil drainage rack for hob disassembly

Abstract

The present invention relates to the field of hob maintenance equipment in shield construction, in particular to a safety pressure relief and oil drainage rack for hob disassembly. It aims to solve the problem of great potential safety hazards caused by the instantaneous ejection of lubricating oil at high temperature during the disassembly step in the prior art during hob maintenance. The present invention includes a hob mounting rack, an adjustment bracket for mounting the hob mounting rack, a transmission rack is provided on the side of the hob mounting rack, a rotating roller that is in shape and position cooperation with a roller is installed on the transmission rack, an acetylene torch is installed on the hob mounting rack, and an oil outlet pipe is installed on the oil sealing hole of the hob. The advantages are as follows: During the process of disassembling the hob, safe synchronous oil drainage is achieved, while reducing the labor intensity of workers, with high automation, low potential safety hazards, and for the first time, real-time transfer cooling is introduced, making the overall construction more stable.

Description

Technical Field

[0001] The present invention relates to the field of hob maintenance equipment in shield tunneling construction, and particularly to a safety pressure relief and oil drainage rack for hob disassembly. Background Art

[0002] As the most effective large-scale comprehensive machinery for long tunnel construction, a TBM (Tunnel Boring Machine) uses a cutterhead to directly contact the working face for rock breaking. Therefore, the use and maintenance conditions of the hobs installed on the cutterhead directly affect the progress of tunnel construction.

[0003] During the working process, the disc cutters installed on the cutterhead are tightly pressed against the rock surface under the action of jacks. As the cutterhead rotates, the disc cutters revolve around the central axis of the cutterhead and rotate around their own axes at the same time. The hob is a rotating body. Under the action of the thrust and torque of the cutterhead, a series of concentric circular grooves are cut on the working face. When the thrust exceeds the strength of the rock, the rock directly under the tip of the disc cutter is broken, the tip penetrates into the rock, forming a crushed zone and radial cracks; further pressurizing, when the distance S between the cutters meets certain conditions, the cracks in the rock between adjacent cutters extend and penetrate each other, forming rock fragments and falling off, and the disc cutter completes a rock breaking process. This working process results in the frequent replacement of hobs during construction.

[0004] During the maintenance and disassembly of hobs, for hobs with a long tunneling mileage, the locking nuts of the hobs often cannot be disassembled by normal wrench disassembly methods due to reasons such as rust, high temperature, or damage to the nut threads. At this time, the locking nuts are removed by oxyacetylene cutting.

[0005] During the cutting process, due to the strong airtightness of the hob itself, when oxyacetylene cutting is carried out, the temperature of the lubricating grease in the hob rises rapidly. During the cutting damage, the high-temperature grease will splash everywhere and there will be a phenomenon of flame combustion, often scalding the operator's body, with a very high risk index, and it will pollute the surrounding environment, making it extremely troublesome to clean up. At present, the solution to this problem is only to let the hob stand still for a long time and then cut slowly to provide a response time for the temperature change of the grease. This solution greatly affects the construction efficiency. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the prior art that during the hob maintenance process, the lubricating oil temperature rises instantaneously during the disassembly step, resulting in the ejection of the oil liquid and a large potential safety hazard.

[0007] The specific solution of the present invention is as follows:

[0008] Design a safety pressure relief and oil drainage rack for hob disassembly, including a hob mounting rack and an adjustment bracket for mounting the hob mounting rack. A transmission rack is provided on the side of the hob mounting rack. A rotating roller that is in shape and position fit with a roller is installed on the transmission rack. An acetylene torch is installed on the hob mounting rack. An oil outlet pipe is installed on the oil sealing hole of the hob. A turntable hole is provided on the hob mounting rack. A turntable is installed in the turntable hole via a bearing. The inner dimension of the turntable is matched with the size of the hob cutter shaft to coaxially sleeved the hob;

[0009] The top surface of the hob mounting rack matches the bottom surface of the hob;

[0010] A hinge connection is provided between the hob mounting rack and the adjustment bracket. A lifting mechanism is further provided at the bottom of the hob mounting rack to drive the relative angle change between the hob mounting rack and the adjustment bracket;

[0011] The transmission rack includes a vertical shaft and a rotating roller. The vertical shaft is clamped on the hob mounting rack. The rotating roller is adjacent to the installation position of the hob;

[0012] The oil outlet pipe includes a metal pipe and a plastic pipe. One section of the metal pipe is fixed on the oil sealing hole, and the other end is sleeved inside the plastic pipe.

[0013] In specific implementation, a spray cooling pipeline is installed on the other side of the rotating roller. The spray cooling pipeline includes a vertical rod and a slider installed on the vertical rod. A spray pipe is installed on the slider. The inlet of the spray pipe is connected to the municipal pipeline.

[0014] In specific implementation, a universal joint is provided at the bottom of the vertical rod.

[0015] In specific implementation, the lifting mechanism includes a jack or a lifting hydraulic cylinder.

[0016] In specific implementation, a handle is provided at the bottom of the hob mounting rack.

[0017] In specific implementation, a motor for driving its rotation is provided on the vertical shaft. The bottom of the motor is fixed on the hob mounting rack.

[0018] In specific implementation, the metal pipe includes a vertical pipe, a turning elbow and a horizontal pipe. The vertical pipe is inserted into the oil sealing hole. A clamping connection that allows full-circle rotation is provided between the turning elbow and the vertical pipe. A sealing ring is provided inside the clamping connection.

[0019] In specific implementation, a temperature-sensitive coating is applied on the outer surface of the rotating roller.

[0020] An L-shaped clamping block is provided below the motor. The L-shaped clamping block is clamped on the hob mounting rack. A movable positioning pin connection is provided between the L-shaped clamping block and the mounting rack.

[0021] On the side of the hob mounting bracket, an acetylene torch mounting bracket is also provided to form an acetylene torch mounting station where the acetylene flame outlet is perpendicular to the hob blade surface.

[0022] The beneficial effects of the present invention are as follows:

[0023] When cutting the hob, this tooling protects the operator from being splashed and burned by high-temperature grease;

[0024] When cutting the hob, this tooling can timely drain the grease into the storage bucket to prevent the splashed grease from polluting the surrounding site environment of the maintenance workshop;

[0025] The combined metal pipe and plastic pipe make it possible to quickly replace the pipe;

[0026] The vertical shaft is clamped on the hob mounting bracket, and while adjusting the inclination angle of the hob, the inclination angle of the rotating roller can be adjusted to achieve synchronous rotation

[0027] In subsequent processing steps, high-quality grease can be selectively collected for recycling;

[0028] For the first time, the present invention adopts a compact structure, which reduces potential safety hazards during the hob disassembly process, protects the workers, and at the same time, the cost is not high;

[0029] The disassembly and assembly of the hob are convenient, easy to install and remove, and the work efficiency is high;

[0030] The design of the rotating roller itself is convenient for replacement, easy to adapt to hobs of multiple sizes and models, and further reduces the processing cost and maintenance cost. Description of the Drawings

[0031] Figure 1 is the front view of the structure of the present invention;

[0032] Figure 2 is the top view of the structure of the present invention;

[0033] Figure 3 is the left view of the structure of the present invention;

[0034] Figure 4 is the right view of the structure of the present invention;

[0035] Figure 5 is the perspective view of the structure of the present invention;

[0036] Figure 6 is the perspective view of another structure of the present invention;

[0037] Figure 7 is the schematic structural diagram of the oil outlet pipe;

[0038] Figure 8 is the schematic working structural diagram of another embodiment;

[0039] Names of each component in the figure: 1. Hob mounting bracket; 2. Adjusting bracket; 3. Transmission bracket; 4. Oil outlet pipe; 5. Lifting mechanism; 6. Vertical shaft; 7. Rotating roller; 8. Vertical rod; 9. Slide block; 10. Handle; 11. Hob; 12. Horizontal pipe; 13. Vertical pipe; 14. Elbow pipe; 15. Plastic pipe; 16. Turntable; 17. Acetylene torch mounting bracket; The motor is installed below the vertical rod. Specific implementation mode

[0040] The following is a description of the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. Embodiment 1

[0041] A safety pressure relief and oil drainage rack for hob disassembly, see Figures 1 to 6 , the design includes a hob mounting bracket 1, an adjusting bracket 2 for mounting the hob mounting bracket 1. A transmission bracket 3 is provided on the side of the hob mounting bracket 1. A rotating roller 7 that is in shape and position cooperation with the roller is installed on the transmission bracket 3. An acetylene torch is installed on the hob mounting bracket 1. An oil outlet pipe 4 is installed on the oil sealing hole of the hob 11. A turntable hole is provided on the hob mounting bracket 1, and a turntable 16 is installed in the turntable hole via a bearing. The inner dimension of the turntable is matched with the size of the hob cutter shaft to coaxially sleeve the hob 11;

[0042] The top surface of the hob mounting bracket 1 matches the bottom surface of the hob 11;

[0043] A hinge connection is provided between the hob mounting bracket 1 and the adjusting bracket 2. A lifting mechanism 5 is further provided at the bottom of the hob mounting bracket 1 to drive the relative angle change between the hob mounting bracket 1 and the adjusting bracket 2;

[0044] The transmission bracket 3 includes a vertical shaft 6 and a rotating roller 7. The vertical shaft 6 is clamped on the hob mounting bracket 1, and the rotating roller 7 is adjacent to the installation position of the hob;

[0045] The oil outlet pipe 4 includes a metal pipe and a plastic pipe 15. One end of the metal pipe is fixed on the oil sealing hole, and the other end is sleeved in the plastic pipe 15. The purpose of the double sleeve design is that the metal pipe has a rapid temperature rise and fall, is similar in material to the hob, avoids the problem of gaps generated due to different temperatures between different materials, and avoids the phenomenon of oil spraying due to gaps. After the hot oil passes through the metal pipe, the temperature decreases, and through the connection of the plastic hose, it can have a better connection with the subsequent oil collection mechanism. At the same time, the plastic itself has better ductility and is more adaptable to the thermal expansion and contraction of the metal, and will not be disconnected from the pipe.

[0046] On the other side of the rotating roller 7, a spray cooling pipeline is installed; the spray cooling pipeline includes a vertical rod 8 and a slider 9 installed on the vertical rod 8, a spray pipe is installed on the slider 9, and the inlet of the spray pipe is connected to a municipal pipeline. Indirect spray cooling can prevent potential safety hazards caused by the rapid cooling of the hob. By adopting a transitional indirect cooling method, it can effectively prevent the shrinkage of the hob under rapid cooling, protect the stability of the internal grease state, and also improve the effect and efficiency of acetylene cutting.

[0047] A universal joint is provided at the bottom of the vertical rod 8. It is convenient to adjust the inclination angle of the vertical rod 8 to ensure the correspondence between the water outlet and the position of the rotating roller 7. Thus, after the rotating roller 7 is cooled by sprayed water vapor, it indirectly drives the hob to cool down. In this embodiment, the waterway connected to the vertical rod 8 is outside the vertical rod 8, and the torsion of the universal joint does not affect the on-off of the waterway. At the same time, it should be noted that in this embodiment, the hinge connection design of the universal joint itself has static friction self-locking and has the function of self-stabilization.

[0048] The lifting mechanism 5 includes a jack or a lifting hydraulic cylinder. During the working process, by lifting the lifting mechanism 5, the inclination angle of the rolling mounting frame is adjusted, thereby helping the worker to find the most suitable working position.

[0049] A handle 10 is provided at the bottom of the hob mounting frame 1. It is convenient for the processing personnel to support and make fine adjustments. During work, after the general position is adjusted, the worker adjusts the rotating roller 7 with the left hand and holds the acetylene torch with the right hand. When the rotating roller 7 does not need to be adjusted or the adjustment gap is small, the worker can hold the handrail to increase the stability of the entire tooling.

[0050] A motor for driving its rotation is provided on the vertical shaft 6, and the bottom of the motor is fixed on the hob mounting frame 1. During work, the motor can drive the rotation of the rotating shaft, and then drive the rotation of the hob through friction.

[0051] The metal pipe includes a vertical pipe 13, a turning elbow, and a horizontal pipe 12. The vertical pipe 13 is inserted into the oil sealing hole. A clamping connection that allows full-circle turning is provided between the turning elbow and the vertical pipe 13, and a sealing ring is provided in the clamping connection. The design of the elbow 14 facilitates keeping the oil outlet facing downward at all times, further reducing potential safety hazards.

[0052] An L-shaped block is provided below the motor. The L-shaped block is clamped on the hob mounting frame 1, and a movable positioning pin connection is provided between the L-shaped block and the mounting frame. The clamping process, as a process of forming a moving pair, realizes the adjustment of friction and provides the freedom for equipment disassembly and assembly. At the same time, when dealing with hobs of different models, with different rotating rollers 7 and different installation distances, they can all be clamped and fixed through this moving pair and the movable positioning pin.

[0053] In this embodiment, the outer surface of the rotating roller 7 is coated with a temperature-sensitive coating. During the working process of the temperature-sensitive coating, the surface color is different at different temperatures, which can remind the staff whether cooling is needed and determine the intensity of spray cooling.

[0054] During the working process, place the disassembled hob in place, raise the jack, adjust the appropriate working station angle, and at the same time adjust the rotating roller 7 to adjust the inclination angle of the appropriate outlet pipe, which is convenient for oxyacetylene cutting of different parts. Assemble the special safety pressure relief and oil drainage tooling for the hob, install the tooling in an oil seal port on the upper end cover of the hob, and seal the other oil seal port with an oil plug. Start oxyacetylene cutting the locking nut of the hob. The grease in the hob expands due to high temperature and flows out from the special safety pressure relief and oil drainage tooling and is discharged into the storage box. After this hob is cut, continue to disassemble the next component, replace the tooling to another hob to be cut, and continue to cycle this step. During the whole process, spray cooling is carried out synchronously. During the cutting process, the hob can be shaken and rotated appropriately to achieve balanced cutting with the acetylene flame.

[0055] The staff confirmed that after using this equipment, the oil discharge step of the hob was effectively shortened from 30 minutes in the original plan to within 5 minutes, greatly improving the work efficiency of hob maintenance. Embodiment 2

[0056] The working principle of this embodiment is the same as that of Embodiment 1. The specific difference is that an acetylene torch mounting bracket is further provided on the side of the hob mounting bracket 1 to form an acetylene torch mounting station where the acetylene flame outlet is perpendicular to the hob blade surface. Further reduce the working intensity of the staff to maintain the stability of the parking position.

[0057] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A safety pressure relief and oil drainage rack for hob disassembly, characterized in that: It includes a hob mounting bracket (1), an adjustment bracket (2) for mounting the hob mounting bracket (1). A transmission bracket (3) is provided on the side of the hob mounting bracket (1). A rotating roller (7) that is in shape and position cooperation with a roller is mounted on the transmission bracket (3). An acetylene spray gun is mounted on the hob mounting bracket (1). An oil outlet pipe (4) is mounted on the oil sealing hole of the hob (11). A turntable hole is provided on the hob mounting bracket (1). A turntable (16) is mounted in the turntable hole via a bearing. The inner dimension of the turntable is matched with the size of the hob cutter shaft to coaxially sleeved the hob (11); The top surface of the hob mounting bracket (1) matches the bottom surface of the hob (11); A hinge connection is provided between the hob mounting bracket (1) and the adjustment bracket (2). A lifting mechanism (5) is further provided at the bottom of the hob mounting bracket (1) to drive the change of the relative angle between the hob mounting bracket (1) and the adjustment bracket (2); The transmission bracket (3) includes a vertical shaft (6) and a rotating roller (7). The vertical shaft (6) is clamped on the hob mounting bracket (1). The rotating roller (7) is adjacent to the installation position of the hob (11); The oil outlet pipe (4) includes a metal pipe and a plastic pipe (15). One section of the metal pipe is fixed on the oil sealing hole, and the other end is sleeved in the plastic pipe (15).

2. The safety pressure relief and oil draining rack for hob disassembly according to claim 1, wherein: A spray cooling pipeline is mounted on the other side of the rotating roller (7). The spray cooling pipeline includes a vertical rod (8) and a slider (9) mounted on the vertical rod (8). A spray pipe is mounted on the slider (9). The inlet of the spray pipe is connected to a municipal pipeline.

3. The safety pressure relief and oil draining rack for hob disassembly according to claim 2, wherein: A universal joint is provided at the bottom of the vertical rod (8).

4. The safety pressure relief and oil drainage rack for hob disassembly according to claim 3, characterized in that: The lifting mechanism (5) includes a jack or a lifting hydraulic cylinder.

5. The safety pressure relief and oil drainage rack for hob disassembly according to claim 4, characterized in that: A handle (10) is provided at the bottom of the hob mounting bracket (1).

6. The safety pressure relief and oil drainage rack for hob disassembly according to claim 1, characterized in that: A motor for driving its rotation is provided on the vertical shaft (6). The bottom of the motor is fixed on the hob mounting bracket (1).

7. The safety pressure relief and oil draining rack for hob disassembly according to claim 6, characterized in that: The metal pipe includes a vertical pipe (13), a turning elbow and a horizontal pipe (12). The vertical pipe (13) is inserted into the oil sealing hole. A clamping connection that allows full-circle rotation is provided between the turning elbow and the vertical pipe (13). A sealing ring is provided in the clamping connection.

8. The safety pressure relief and oil draining rack for hob disassembly according to claim 7, wherein: A [shaped clamping block is provided below the motor. The [shaped clamping block is clamped on the hob mounting bracket (1). A movable positioning pin connection is provided between the [shaped clamping block and the mounting bracket.

9. The safety pressure relief and oil drainage rack for hob disassembly according to claim 1, characterized in that: An acetylene gun mounting bracket is further provided on the side of the hob mounting bracket (1).

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