CN115519464A

CN115519464A - Grinding and polishing integrated processing device for inner wall of elbow with large length-diameter ratio

Info

Publication number: CN115519464A
Application number: CN202211174939.0A
Authority: CN
Inventors: 肖贵坚; 汪迎新; 苏振华; 黄云; 黄建超; 杨政宇; 倪源河
Original assignee: National Machine Heavy Equipment Group Ltd By Share Ltd; Chongqing University
Current assignee: National Machine Heavy Equipment Group Ltd By Share Ltd; Chongqing University
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-27

Abstract

The invention provides a grinding and polishing integrated processing device for the inner wall of a bent pipe with a large length-diameter ratio. The equipment mainly comprises a polishing wheel grinding and polishing device, a guide device, a bent pipe clamping device, a flexible shaft and a traction device. The grinding and polishing device consists of two polishing wheels, two ends of each polishing wheel are respectively made into a cone shape so as to be plugged into the bent pipe, the diameter of each polishing wheel is slightly larger than that of the inner wall of the bent pipe, and the polishing wheels and the bent pipe are connected through a universal joint. The rotary motion of the grinding and polishing device is driven by a flexible shaft. The front end and the rear end of the guide device are respectively provided, so that the overall stability is ensured. The guiding devices at the two ends are connected with traction wires, and reciprocating feeding motion is realized by winding and unwinding of the winding roll. The invention is suitable for processing the bent pipe with an angle of 45 degrees or more, solves the problems of strong interference, low efficiency, difficult guarantee of surface quality and the like existing in the grinding of the inner wall of the bent pipe, and realizes the grinding processing with high efficiency and high surface quality.

Description

Grinding and polishing integrated processing device for inner wall of elbow with large length-diameter ratio

Technical Field

The invention relates to the technical field of grinding and polishing of the inner wall of a bent pipe, in particular to a grinding and polishing integrated processing device for the inner wall of the bent pipe with a large length-diameter ratio.

Background

At present, the polishing of the inner wall of a pipeline is mainly carried out in a manual polishing mode and machine tool equipment processing mode, and the defects of low processing efficiency, poor applicability, incapability of ensuring the quality of a processed surface and the like exist. Aiming at the elbow inner wall with large length-diameter ratio, the traditional polishing mode is difficult to apply, and is limited by a working space and an elbow structure, so that the polishing difficulty of the elbow inner wall is further increased.

Therefore, the development of the grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio has important engineering significance and social value.

Disclosure of Invention

The invention aims to provide a grinding and polishing integrated processing device for the inner wall of a bent pipe with a large length-diameter ratio, and aims to solve the problems in the prior art.

The technical scheme adopted for achieving the purpose of the invention is that the grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio comprises two sets of traction devices, a grinding and polishing device and a flexible shaft power device.

The grinding and polishing device comprises two sets of motion guide devices and a set of polishing device. The two sets of motion guiding devices are arranged at intervals. The polishing device is positioned between the two sets of motion guiding devices. The polishing device comprises two polishing wheels. The two polishing wheels are connected by a universal joint. The polishing wheel comprises a hub and polishing materials arranged on the outer edge of the hub.

The motion guiding device comprises a traction ring, a guiding device, a first hose, a rotary joint and a second hose which are sequentially arranged. The guiding device comprises an installation main body and three groups of walking wheel components. The whole installation main body is a cylinder. And a bolt through hole is formed in the cylinder wall of the mounting main body. The walking wheel component comprises a compression spring, a bolt, a supporting wheel frame and a supporting wheel. And the supporting wheel frame is provided with a supporting wheel. And the supporting wheel frame is provided with bolt fixing holes. One end of the bolt is fixedly connected with the supporting wheel frame through the bolt fixing hole, and the other end of the bolt is provided with a locknut. The bolt passes through bolt via hole and installation main part sliding connection. And a compression spring is sleeved on a screw rod of the bolt. The compression spring is positioned between the mounting main body and the support wheel carrier. One end of the mounting main body is provided with a traction ring, and the other end of the mounting main body is connected with the head end of the first hose. The tail end of the first hose is connected with the head end of the second hose through a rotary joint. The tail end of the second hose is fixedly connected with a hub of the polishing wheel. The two sets of traction devices are respectively connected with the traction rings of the two sets of motion guide devices.

The flexible shaft power device comprises a flexible shaft motor and a transmission flexible shaft. The flexible shaft motor is connected with the polishing device through the transmission flexible shaft and transmits power.

When in work, the grinding and polishing device is arranged in the inner cavity of the elbow. The flexible shaft motor is started to operate to drive the transmission flexible shaft and the polishing device to rotate at a high speed. The traction device drives the grinding and polishing device to perform feeding motion in the pipeline. Under the guiding and positioning action of the motion guiding device, the polishing wheel is always positioned at the central position of the bent pipe when rotating at high speed. The polishing wheel is in frictional contact with the inner wall of the bent pipe, and the inner wall of the bent pipe is uniformly and stably polished.

Further, the device comprises a workpiece clamping device and a workpiece clamping platform. The clamping surface of the workpiece clamping device is V-shaped. The workpiece clamping device is connected to the workpiece clamping platform through threads. The workpiece clamping device fixes the bent pipe on the workpiece clamping platform.

Further, the polishing wheel is a thousand impeller or a sand wheel.

Furthermore, the hub of the polishing wheel is connected with the transmission flexible shaft through a fastening head. The fastening head comprises a front screw, a fixed rod, a rear baffle and a rear connector which are sequentially connected. The polishing wheel is fixed on the fixing rod. Screw holes are arranged on the rear joint, and screw rods which are matched and connected with the screw holes are arranged on the transmission flexible shaft.

Furthermore, the support wheel carrier comprises a flat plate and two side plates extending from two ends of the flat plate. The two side plates clamp the support wheel. And the flat plate is provided with bolt fixing holes.

Further, the rotary joint comprises a joint body and a rotating sleeve. The joint body is provided with a rotating cavity. And a bearing is arranged in the rotating cavity. One end of the rotating sleeve extends into the rotating cavity to be rotatably connected with the bearing, and the other end of the rotating sleeve extends out of the joint body. The first hose and the second hose are respectively and fixedly connected with the joint body and the rotating sleeve.

Furthermore, draw gear includes support frame, pull wire, take-up reel, driving belt and driving motor. The winding roll is rotatably connected to the support frame. The winding roll comprises two turntables and a string post. One end of the traction wire is wound on the wire column, and the other end of the traction wire is connected with the traction ring. The driving motor drives the wire column to rotate through the transmission belt, and the winding and unwinding of the winding roll are achieved.

The technical effects of the invention are undoubted:

1. the inner wall of the elbow with the large length-diameter ratio can be subjected to surface grinding and polishing, the problems that the surface of the inner wall of the elbow with the large length-diameter ratio is difficult to machine, the machining quality of the ground inner surface is low and the like in the market are solved, and effective and high-surface-quality grinding and machining of the inner wall of the elbow with the large length-diameter ratio are realized;

2. the inner wall of the elbow with large length-diameter ratio can be ground and polished by a multi-process integrated technology, so that the processing efficiency is improved, and the processing precision is ensured. Meanwhile, the number of special grinding tools manufactured for grinding the inner walls of different bent pipes is greatly reduced, and the cost is reduced;

3. the temperature of the inner wall of the pipeline is raised by the previous processing, the generated heat influences the formation of the surface of the inner wall of the next processing, the material of the inner wall can be better removed, and the quality of the processed inner wall is improved;

4. the universal joint is connected with the grinding device and the polishing device, and the same drive is used, so that synchronous transmission is realized, the fatigue of the device under multiple drives is relieved, the cost of the device is reduced, and the engineering is realized;

5. the grinding device and the polishing device can replace abrasive belts and polishing wheels with different precisions, so as to meet the inner wall polishing of different requirements; the grinding and polishing device is driven by the flexible shaft, so that the complexity of the structure is reduced, and the effect of optimizing the layout is also achieved.

Drawings

FIG. 1 is a schematic structural view of a grinding and polishing integrated processing device for the inner wall of a large length-diameter ratio elbow;

FIG. 2 is a schematic view of the structure of the traction device;

FIG. 3 is a schematic structural view of a workpiece clamping device;

FIG. 4 is a schematic view of a grinding and polishing apparatus;

FIG. 5 is a schematic view of the guide structure;

FIG. 6 is a schematic view of a flexible shaft power device.

In the figure: the automatic grinding and polishing device comprises a traction device 1, a traction wire 101, a winding reel 102, a transmission belt 103, a driving motor 104, a workpiece clamping device 2, a grinding and polishing device 3, a traction ring 301, a guide device 302, an installation main body 3021, a compression spring 3022, a supporting wheel carrier 3023, a supporting wheel 3024, a first hose 303, a second hose 3030, a rotary joint 304, a polishing wheel 305, a universal joint 306, a flexible shaft power device 4, a flexible shaft motor 401, a transmission flexible shaft 402, a workpiece clamping platform 5 and a bent pipe 6.

Detailed Description

The present invention will be further described with reference to the following examples, but it should be understood that the scope of the subject matter described above is not limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.

Example 1:

referring to fig. 1 to 6, the embodiment provides a grinding and polishing integrated processing device for an inner wall of a bent pipe with a large length-diameter ratio, which includes two sets of traction devices 1, a grinding and polishing device 3 and a flexible shaft power device 4.

The grinding and polishing device 3 comprises two sets of motion guiding devices and one set of polishing device. The two sets of motion guiding devices are arranged at intervals. The polishing device is positioned between the two sets of motion guide devices. The polishing apparatus includes two polishing wheels 305. The two polishing wheels 305 are connected by a universal joint 306. The two polishing wheels 305 transmit torque through a universal joint 306, and the grinding and polishing integrated function is realized. The polishing wheel 305 includes a hub and a polishing material disposed on an outer edge of the hub.

The movement guide device comprises a traction ring 301, a guide device 302, a first hose 303, a rotary joint 304 and a second hose 3030 which are arranged in sequence. The guide device 302 includes a mounting body 3021 and three sets of traveling wheel components. The mounting body 3021 is a cylindrical body as a whole. The cylinder wall of the mounting main body 3021 is provided with a bolt through hole. The road wheel components include a compression spring 3022, bolts, a support wheel carrier 3023 and a support wheel 3024. The supporting wheel rack 3023 comprises a flat plate and two side plates extending from two ends of the flat plate. The two side plates clamp the support wheel 3024. And bolt fixing holes are formed in the flat plate. One end of the bolt is fixedly connected with the supporting wheel frame 3023 through a bolt fixing hole, and the other end of the bolt is provided with a locknut. The bolt is slidably connected to the mounting body 3021 through a bolt passage hole. And a compression spring 3022 is sleeved on a screw rod of the bolt. The compression spring 3022 is located between the mounting body 3021 and the support wheel frame 3023. The spring-type structure can adapt to pipelines with different inner diameters. The mounting body 3021 has a pull ring 301 at one end and a first hose end connected to the other end. The tail end of the first hose 303 is connected with the head end of the second hose 3030 through a rotary joint 304. The tail end of the second hose 3030 is fixedly connected with the hub of the polishing wheel 305. The two sets of traction devices 1 are respectively connected with the traction rings 301 of the two sets of motion guiding devices. The first hose 303 and the second hose 3030 can ensure the over-bending performance and increase the applicability of the device.

The flexible shaft power device 4 comprises a flexible shaft motor 401 and a transmission flexible shaft 402. The flexible shaft motor 401 and the polishing device are connected through a transmission flexible shaft 402 for power transmission. The flexible transmission shaft 402 sequentially passes through the second hose 3030, the rotary joint 304 and the first hose 303 and then is connected with the polishing wheel 305.

In operation, the grinding and polishing device 3 is disposed in the inner cavity of the elbow 6. The flexible shaft motor 401 is started to operate, and drives the transmission flexible shaft 402 and the polishing device to rotate at a high speed. The traction device 1 drives the grinding and polishing device 3 to perform feed motion in the pipeline. Under the guiding and positioning action of the motion guiding device, the polishing wheel 305 is always located at the center of the elbow 6 when rotating at high speed. The polishing wheel 305 is in frictional contact with the inner wall of the elbow pipe 6, and uniformly and stably polishes the inner wall of the elbow pipe 6.

In the embodiment, the polishing wheel is used as a grinding tool, and the grinding and polishing integrated flexible processing of the inner wall of the bent pipe can be realized. The problems of low processing efficiency, low applicability, incapability of ensuring the quality of a processed surface and the like are solved. The embodiment ensures that the device can move on the inner wall of the bent pipe without obstacles, realizes the finish machining of the inner wall of the bent pipe, and can realize the grinding and polishing of the inner diameter of the self-adaptive pipe. This embodiment is applicable to the return bend of angle more than 45, and the roughness of polishing can be between 3.2um ~ 6.3 um.

Example 2:

the main structure of the present embodiment is the same as that of embodiment 1, wherein the present embodiment further comprises a workpiece clamping device 2 and a workpiece clamping platform 5. The clamping surface of the workpiece clamping device 2 is V-shaped. The workpiece clamping device 2 is connected to the workpiece clamping platform 5 through threads. The workpiece clamping device 2 fixes the bent pipe 6 on the workpiece clamping platform 5. The workpiece clamping platform 5 is provided with a plurality of threaded holes, and the elbow pipes 6 with different shapes can be adapted by changing the installation position of the workpiece clamping device 2.

Example 3:

the main structure of this embodiment is the same as that of embodiment 1, wherein the polishing wheel 305 is a thousand-blade wheel or a emery wheel. The replacement of different types of polishing wheels 305 can accommodate different operational requirements.

Example 4:

the main structure of this embodiment is the same as that of embodiment 1, wherein the hub of the polishing wheel 305 is connected to the flexible transmission shaft 402 through a fastening head. The fastening head comprises a front screw, a fixed rod, a rear baffle and a rear connector which are sequentially connected. The polishing wheel 305 is fixed on a fixing rod. Screw holes are arranged on the rear joint, and screw rods which are matched and connected with the screw holes are arranged on the transmission flexible shaft 402.

Example 5:

the main structure of this embodiment is the same as that of embodiment 1, wherein the rotary joint 304 includes a joint body and a rotary sleeve. The joint body is provided with a rotating cavity. And a bearing is arranged in the rotating cavity. One end of the rotating sleeve extends into the rotating cavity to be rotatably connected with the bearing, and the other end of the rotating sleeve extends out of the joint body. The first hose 303 and the second hose 3030 are fixedly connected with the joint body and the rotating sleeve respectively. The swivel 304 ensures that the rotation of the polishing wheel 305 does not affect the guide 302. In this embodiment, the rotary joint 304 is a rotary joint of DN100 type.

Example 6:

the main structure of this embodiment is the same as that of embodiment 1, wherein the traction apparatus 1 includes a support frame, a traction wire 101, a winding roll 102, a transmission belt 103 and a driving motor 104. The winding roll 102 is rotatably connected to the support frame. The take-up reel 102 includes two turntables and a spool. One end of the traction wire is wound on the wire column, and the other end of the traction wire is connected with the traction ring 302. The driving motor 104 drives the wire pole to rotate through the driving belt 103, so that the winding and unwinding of the winding roll 102 are realized.

Example 7:

the main structure of the present embodiment is the same as that of embodiment 1, wherein the present embodiment further comprises a grinding quality detection device and an SGX5.0 dust removal system which are matched with each other.

Claims

1. The utility model provides a big length-diameter ratio return bend inner wall grinds throws integration processingequipment which characterized in that: comprises two sets of traction devices (1), a grinding and polishing device (3) and a flexible shaft power device (4);

the grinding and polishing device (3) comprises two sets of motion guide devices and a set of polishing device; the two sets of motion guiding devices are arranged at intervals; the polishing device is positioned between the two sets of motion guide devices; the polishing device comprises two polishing wheels (305); the two polishing wheels (305) are connected by a universal joint (306); the polishing wheel (305) comprises a hub and polishing materials arranged at the outer edge of the hub;

the motion guide device comprises a traction ring (301), a guide device (302), a first hose (303), a rotary joint (304) and a second hose (3030) which are arranged in sequence; the guide device (302) comprises a mounting body (3021) and three sets of travelling wheel components; the mounting main body (3021) is a cylinder as a whole; a bolt through hole is formed in the cylinder wall of the mounting main body (3021); the walking wheel component comprises a compression spring (3022), a bolt, a supporting wheel frame (3023) and a supporting wheel (3024); a supporting wheel (3024) is arranged on the supporting wheel frame (3023); the supporting wheel frame (3023) is provided with bolt fixing holes; one end of the bolt is fixedly connected with the supporting wheel frame (3023) through a bolt fixing hole, and the other end of the bolt is provided with a locknut; the bolt is connected with the mounting main body (3021) in a sliding mode through a bolt through hole; a compression spring (3022) is sleeved on a screw rod of the bolt; the compression spring (3022) is positioned between the mounting body (3021) and the support wheel carrier (3023); one end of the mounting main body (3021) is provided with a traction ring (301), and the other end of the mounting main body is connected with the head end of the first hose; the tail end of the first hose (303) is connected with the head end of the second hose (3030) through a rotary joint (304); the tail end of the second hose (3030) is fixedly connected with the hub of the polishing wheel (305); the two sets of traction devices (1) are respectively connected with the traction rings (301) of the two sets of motion guide devices;

the flexible shaft power device (4) comprises a flexible shaft motor (401) and a transmission flexible shaft (402); the flexible shaft motor (401) is connected with the polishing device through a transmission flexible shaft (402) and performs power transmission;

when the device works, the grinding and polishing device (3) is arranged in the inner cavity of the elbow (6); the flexible shaft motor (401) is started to operate to drive the transmission flexible shaft (402) and the polishing device to rotate at a high speed; the traction device (1) drives the grinding and polishing device (3) to perform feed motion in the pipeline; under the guiding and positioning action of the motion guiding device, the polishing wheel (305) is always positioned at the central position of the elbow (6) when rotating at high speed; the polishing wheel (305) is in friction contact with the inner wall of the elbow (6) to uniformly and stably polish the inner wall of the elbow (6).

2. The grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio according to claim 1 is characterized in that: the device also comprises a workpiece clamping device (2) and a workpiece clamping platform (5); the clamping surface of the workpiece clamping device (2) is V-shaped; the workpiece clamping device (2) is connected to the workpiece clamping platform (5) through threads; the workpiece clamping device (2) fixes the bent pipe (6) on the workpiece clamping platform (5).

3. The grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio according to claim 1 is characterized in that: the polishing wheel (305) is a thousand-blade wheel or a sand wheel.

4. The grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio according to claim 1 is characterized in that: the hub of the polishing wheel (305) is connected with the transmission flexible shaft (402) through a fastening head; the fastening head comprises a front screw, a fixed rod, a rear baffle and a rear joint which are sequentially connected; the polishing wheel (305) is fixed on the fixing rod; screw holes are arranged on the rear joint, and screw rods which are matched and connected with the screw holes are arranged on the transmission flexible shaft (402).

5. The grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio according to claim 1 is characterized in that: the supporting wheel frame (3023) comprises a flat plate and two side plates extending out of two ends of the flat plate; the two side plates clamp a support wheel (3024); and the flat plate is provided with bolt fixing holes.

6. The grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio according to claim 1 is characterized in that: the rotary joint (304) comprises a joint body and a rotary sleeve; the joint body is provided with a rotating cavity; a bearing is arranged in the rotating cavity; one end of the rotating sleeve extends into the rotating cavity to form rotating connection with the bearing, and the other end of the rotating sleeve extends out of the joint body; the first hose (303) and the second hose (3030) are fixedly connected with the joint body and the rotating sleeve respectively.

7. The grinding and polishing integrated processing device for the inner wall of the elbow with the large length-diameter ratio according to claim 1 is characterized in that: the traction device (1) comprises a support frame, a traction wire (101), a winding roll (102), a transmission belt (103) and a driving motor (104); the winding roll (102) is rotatably connected to the support frame; the winding roll (102) comprises two turntables and a string post; one end of the traction wire is wound on the wire column, and the other end of the traction wire is connected with the traction ring (302); the driving motor (104) drives the wire column to rotate through the transmission belt (103), and the winding and unwinding of the winding roll (102) are achieved.