Suspended wall self-weight large-diameter steel pipe running rail type outer circle shaping device

Abstract

The utility model discloses a suspended wall self-weight large-caliber running rail type steel pipe outer circle shaping device which comprises a bearing table of a machined steel pipe and a rail parallel to the length direction of the bearing table, and is characterized in that a plurality of groups of left supporting wheels and right supporting wheels which are arranged in pairs are arranged along the length direction of the bearing table; wherein the supporting wheel on one side of the steel pipe is a driving wheel, and the supporting wheel on the other side of the steel pipe is a follower wheel; a moving trolley is arranged on the track, a rotating arm is hinged to the moving trolley, a grinding machine is arranged on the rotating arm, and a balance weight mechanism is arranged at the top end of the rotating arm. The problems of difficulty in end clamping, difficulty in coaxiality adjustment, poor polishing stability and the like in large-diameter stainless steel cast pipe blank surface finishing operation are solved, the phenomenon of piece explosion caused by self vibration, bounce displacement and the like of a grinding machine in the finishing process is overcome, the most appropriate polishing force can be obtained through adjustment in a self-weight and counterweight rotating arm pressure applying mode, operation is easy, and the working efficiency is improved. Safety and reliability.

Description

Technical Field

[0001] The utility model relates to the technology of pipe body surface processing equipment, in particular to a running rail type outer circle shaping device for large-caliber steel pipes with self-weight on the cantilever. Background Art

[0002] There are various different designs of pipe body surface grinding and polishing devices in the disclosed technologies. For example, in the pneumatic steel pipe outer circle grinding and polishing machine proposed in the patent publication number CN105196146B, it includes a fixed feeding device, a stator with a stepped hole in the inner hole, and a rotor support frame; a frustum-shaped rotor that can rotate around its own axis is eccentrically arranged in the stator. A cavity is formed between the larger diameter end of the rotor and the larger diameter end of the stator. The smaller diameter end of the rotor is connected to the rotor support frame. Multiple blades are evenly distributed at the larger diameter end of the rotor, and three polishing head device mounting holes communicating with the inner hole of the rotor are also evenly distributed. The blades can reciprocate along the radial direction of the rotor diameter; an air inlet and an air outlet communicating with the cavity are provided on the side wall of the stator; a reciprocating polishing head device is arranged in the polishing head device mounting hole. This polishing machine can perform rust removal and scale removal operations on the expansion joint and welding parts of U-shaped heat exchange tubes and tube plates, as well as the splicing joint positions of other curved round tube-shaped workpieces. Another example is the surface polishing equipment for processing stainless steel steel pipes with the patent publication number CN115351691A. A loading box for stacking multiple steel pipes is arranged on one side of the base. A feeding mechanism for releasing the steel pipes is arranged at the bottom outlet end of the loading box. A feeding mechanism in contact with the feeding mechanism is arranged on the base. The feeding mechanism transports the steel pipe to the other side of the base and clamps the steel pipe. A first polishing mechanism is arranged on the other side of the base, and a second polishing mechanism is arranged on the other side of the base. This device transports the steel pipe to the other side of the base and clamps the steel pipe through the feeding mechanism. The first polishing mechanism polishes the inner circumferential side wall of the clamped steel pipe, and the second polishing mechanism polishes the outer circumferential side wall of the clamped steel pipe. The polished steel pipe flows out and is collected through the discharge plate. For large-caliber stainless steel casting pipes, due to their large diameter, if the end needs to be clamped and rotated, a very large clamping and rotating mechanism needs to be configured. And due to the lack of surface accuracy at the end of the casting pipe, not only is the clamping and adjustment difficult, but also the stability of the open-ended length section far from the clamping end is poor during grinding and polishing, and jitter, deviation, etc. can all cause the polishing operation to not proceed smoothly. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems, and provide a running rail type outer circle shaping device for large-caliber steel pipes with self-weight on the cantilever. It has an open-ended pipe body step-by-step rotation mode, self-weight plus a cantilever counterweight side-pressure type rotating arm to assist in applying pressure, can adjust the suitable polishing force, does not require special clamping and tightening at the end, is simple to operate, and is safe and reliable.

[0004] The above technical problems of the present utility model are mainly solved by the following technical solutions: A cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, including a bearing platform for the steel pipe to be processed, and a track arranged parallel to the length direction of the bearing platform, characterized in that a number of pairs of left support wheels and right support wheels are arranged along the length direction of the bearing platform, wherein the support wheels on one side of the steel pipe are driving wheels, and the support wheels on the other side of the steel pipe are follower wheels;

[0005] A moving trolley is arranged on the track, a rotating arm is hinged on the moving trolley, a grinding wheel is arranged on the rotating arm, and a counterweight mechanism is arranged at the top end of the rotating arm.

[0006] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, the counterweight mechanism is located at the top end of the rotating arm and is adjustable in position along the length direction of the rotating arm.

[0007] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, the counterweight mechanism includes a counterweight arm connected to the rotating arm, and a number of detachable counterweight blocks are arranged on the counterweight arm.

[0008] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, the counterweight arm extends along the length direction of the rotating arm or inclines towards the bearing platform.

[0009] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, a limit mechanism for the rotation angle of the rotating arm is arranged on the moving trolley, and the limit mechanism includes an inner limit body on the side of the rotating arm facing the bearing platform and an outer limit body facing the operation station direction.

[0010] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, the driving wheels on one side of the steel pipe are connected in series on the same driving shaft or on the driving shafts that rotate synchronously.

[0011] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, a retracting and extending mechanism for the rotating arm is arranged at the upper part of the rotating arm, and the retracting and extending mechanism for the rotating arm includes a cable connected to the rotating arm, and the other end of the cable is connected to a cable reel, and the cable reel is fixed to a bracket arranged on the moving trolley.

[0012] For the above-mentioned cantilever self-weight large-diameter steel pipe running-rail type outer circle shaping device, preferably, a trolley driving mechanism and an operation box are arranged on the moving trolley.

[0013] In view of the problems that it is difficult to clamp and drive the rotation of large-caliber casting pipes due to their large diameter, and the surface accuracy is poor and the clamping adjustment is complex, this technical solution designs a large-diameter steel pipe that only rotates step by step around its center line to provide a single axial generatrix for surface modification. A grinding wheel is carried by a moving trolley to move along the axial direction of the steel pipe to complete the surface polishing of the corresponding generatrix part.

[0014] The step-by-step rotation of the steel pipe around its center line is carried out on the bearing platform. The steel pipe is supported by multiple pairs of left and right supporting wheels arranged in the length direction of the bearing platform. The steel pipe is gravity-centered under its own weight. Among them, the supporting wheel on one side of the steel pipe serves as the driving wheel and is driven by the driving mechanism, and the supporting wheel on the other side serves as the follower wheel. The driving mechanism makes all the driving wheels rotate synchronously through a driving shaft to ensure that all the driving wheels apply force to the steel pipe at the same time. Since the large-diameter steel pipe is relatively heavy, the polishing force of the grinding wheel is not enough to displace the steel pipe, and the steel pipe will remain relatively stable during the operation.

[0015] The polishing operation is completed by the grinding wheel arranged on the moving trolley. The moving trolley runs on the track arranged parallel to the length direction of the bearing platform. The grinding wheel is installed on the rotating arm, and the rotating arm is hinged on the moving trolley. The rotating arm can tilt towards the steel pipe to make the grinding wheel closely adhere to the surface of the steel pipe for polishing. Since the self-weight of the rotating arm and its accessories such as the grinding wheel alone cannot ensure that the grinding wheel applies reasonable polishing force to the surface of the steel pipe during the polishing process, therefore, this solution is provided with a counterweight mechanism at the top of the rotating arm. The position of this counterweight mechanism along the length direction of the rotating arm is adjustable, and multiple detachable (addable) counterweight blocks are also configured to adjust different counterweights according to different surface finishing requirements.

[0016] Furthermore, the safe rotation angle of the rotating arm is ensured by its limiting mechanism. One is that the inner limiting body on the side towards the bearing platform serves as the constraint for the maximum working inclination angle of the grinding wheel, and the outer limiting body towards the operation station can control and fix the rotating arm during operations such as pipe loading and unloading.

[0017] At the same time, the rotating arm retracting and extending mechanism provided at the upper part of the rotating arm can assist the operator to smoothly lower the rotating arm and ensure the safety of the rotating arm during rotation and at each working station. In addition, a trolley driving mechanism and an operation box are provided on the moving trolley, which are suitable for on-site operations by operators.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: It solves the problems existing in the surface finishing operation of large-diameter stainless steel cast pipe blanks, such as difficult end clamping, difficult coaxiality adjustment, and poor polishing stability. It overcomes the bursting phenomenon caused by the self-vibration, bouncing and displacement of the grinding wheel during the finishing process. The pressure application method of the self-weight plus counterweight rotating arm can adjust the most suitable polishing force, and the operation is simple, safe and reliable. Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the present utility model.

[0020] Figure 2 It is a structural schematic diagram of the working state of the present utility model.

[0021] Figure 3 is Figure 1 the top view structural schematic diagram of

[0022] In the figure: 1 - mobile trolley, 2 - outer limiting body, 3 - inner limiting body, 4 - bearing platform, 5 - left support wheel, 6 - right support wheel, 7 - grinding wheel, 8 - rotating arm, 9 - cable, 10 - cable reel, 11 - bracket, 12 - operation box, 13 - trolley drive mechanism, 14 - track, 15 - main drive mechanism, 16 - drive shaft, 17 - steel pipe, 18 - counterweight mechanism. Specific embodiments

[0023] The technical solution of the present utility model will be further specifically described below through embodiments in conjunction with the drawings.

[0024] In this embodiment, a cantilever self - weighted large - diameter steel pipe running - rail type outer - circle shaping device, as Figure 1 shown, includes a bearing platform 4 for the steel pipe 17 to be processed, a double - track 14 arranged parallel to the length direction of the bearing platform 4. Taking a 6 - meter - long steel pipe 17 product as the processing object, 7 pairs of left support wheels 5 and right support wheels 6 are arranged along the length direction of the bearing platform 4. Among them, the left support wheel 5 on one side of the steel pipe 17 is the driving wheel, and the right support wheel 6 on the other side of the steel pipe 17 is the follower wheel. The left support wheels 5 are connected in series on the same drive shaft 16. As Figure 3 shown, it can also be connected by a segmented shaft, but it needs to be on the drive shaft that rotates synchronously. The drive shaft 16 is driven by the main drive mechanism 15.

[0025] A mobile trolley 1 is arranged on the track 14. A trolley drive mechanism 13 is arranged on the mobile trolley 1. The trolley drive mechanism 13 includes a transmission system composed of a motor, a reducer, a transmission chain, a sprocket, etc., which drives a set of track wheels at the bottom of the mobile trolley 1. An operation box 12 is arranged on the trolley for on - site operation. Since these drive - transmission - control are all commonly used existing technologies, they will not be elaborated here.

[0026] A pair of rotating arms 8 are hinged on the mobile trolley 1. A grinding wheel 7 is arranged on the rotating arm 8. A counterweight mechanism 18 is arranged at the top of the rotating arm 8. The counterweight mechanism 18 is located at the top of the rotating arm 8 and its position is adjustable along the length direction of the rotating arm 8.

[0027] Specifically, the counterweight mechanism 18 includes a counterweight arm connected to the rotating arm 8. The counterweight arm extends along the length direction of the rotating arm 8 or inclines towards the carrying platform 4. The length of the counterweight arm is such that it does not interfere with the surface finishing of the steel pipe 17 with the maximum diameter. A number of detachable counterweight blocks that can be arbitrarily matched are provided on the counterweight arm.

[0028] Furthermore, a retracting and extending mechanism for the upper part of the rotating arm 8 is provided. The retracting and extending mechanism for the rotating arm 8 includes a cable 9 connected to the rotating arm 8. The other end of the cable 9 is connected to a cable reel 10. The cable reel 10 is fixed to a bracket 11 arranged on the moving trolley 1. A handle is provided on the cable reel 10. The cable 9 can be wound around the cable reel 10 through the handle. A one-way locking clutch is provided in the core of the cable reel 10. The clutch is composed of a clutch gear and a spring. Opening the clutch allows the cable reel 10 to rotate freely for paying out the cable, while preventing the cable reel 10 from reversing when retracting the cable 9.

[0029] Still further, a limiting mechanism for the rotation angle of the rotating arm 8 is provided on the moving trolley 1. The limiting mechanism includes an inner limiting body 3 on the side of the rotating arm towards the carrying platform 4 and an outer limiting body 2 towards the operation station direction. The inner limiting body 3 can restrict the maximum working inclination angle of the grinding wheel 7, and the outer limiting body 2 can control and fix the rotating arm 8 during the pipe loading and unloading operations.

[0030] Working principle and use: Place the workpiece steel pipe 17 naturally on the left support wheel 5 and the right support wheel 6, and center it naturally according to its center of gravity. Lower the rotating arm 8 and first adjust the working position of the grinding wheel 7. Under the action of the weight of the rotating arm 8 and its accessories, the grinding wheel 7 has a certain pressing force on the steel pipe 17. However, relying solely on this pressure is not sufficient to ensure the normal operation of the grinding wheel 7. Therefore, it is necessary to adjust the pressure of the grinding wheel 7 relative to the steel pipe 17 with counterweight blocks. After adjusting the appropriate pressure, start the grinding wheel 7 and the moving trolley 1 for the finishing operation. Of course, during the long-term finishing process, the pressure between the grinding wheel 7 and the steel pipe 17 can also be adjusted at any time by increasing or decreasing the counterweight blocks to obtain the best finishing effect.

[0031] After finishing the finishing of one bus position of the steel pipe 17, start the main drive mechanism 15 to rotate the steel pipe 17 by an angle or rotate it to the position to be finished for the next operation process.

[0032] The above embodiments are illustrative of the present invention and not restrictive thereof. Any simple transformation of the structure of the present invention by those of ordinary skill in the art without departing from the principles of the technical solution and without creative labor falls within the protection scope of the present invention.

Claims

1. A cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device, comprising a support platform (4) for a steel pipe (17) to be processed, and a track (14) arranged parallel to the length direction of the support platform, characterized in that A plurality of left supporting wheels (5) and right supporting wheels (6) are arranged in pairs along the length direction of the bearing platform, wherein the supporting wheel on one side of the steel pipe is a driving wheel, and the supporting wheel on the other side of the steel pipe is a follower wheel; A moving trolley (1) is arranged on the track, a rotating arm (8) is hingedly connected to the moving trolley, a grinding wheel machine (7) is arranged on the rotating arm, and a counterweight mechanism (18) is arranged at the top end of the rotating arm.

2. According to claim 1, a cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device is characterized by: The counterweight mechanism (18) is located at the top of the rotating arm (8) and is adjustable in position along the length direction of the rotating arm.

3. A cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device according to claim 1 or 2, characterized in that: The counterweight mechanism (18) comprises a counterweight arm connected to the rotating arm (8), and a plurality of detachable counterweight blocks are arranged on the counterweight arm.

4. The cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device according to claim 3 is characterized in that: The counterweight arm extends along the length direction of the rotating arm (8) or is inclined toward the bearing platform (4).

5. The cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device according to claim 1 is characterized in that: The movable trolley (1) is provided with a limit mechanism for the rotation angle of the rotating arm (8), the limit mechanism comprising an inner limit body (3) located on the side of the rotating arm facing the bearing platform (4) and an outer limit body (2) facing the operating station.

6. The cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device according to claim 1 is characterized in that: The driving wheel on one side of the steel pipe (17) is connected in series to the same driving shaft (16) or to a synchronously rotating driving shaft.

7. The cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device according to claim 1 is characterized in that: The upper portion of the rotating arm (8) is provided with a rotating arm retracting and extending mechanism, which comprises a cable (9) connected to the rotating arm, the other end of the cable being connected to a cable reel (10), and the cable reel being fixed to a bracket (11) arranged on the moving trolley (1).

8. The cantilever self-balancing large-caliber steel pipe track-type external roundness shaping device according to claim 1 is characterized in that: The mobile trolley (1) is provided with a trolley driving mechanism (13) and an operating box (12).

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