CN111496586B

CN111496586B - Pipeline grinding device

Info

Publication number: CN111496586B
Application number: CN202010338571.1A
Authority: CN
Inventors: 王仕强; 何莎; 喻建胜; 万夫; 赵琪月; 骆吉庆; 李超; 何雨洁; 陈文斌; 邓勇刚; 徐冀林
Original assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2021-09-03
Anticipated expiration: 2040-04-26
Also published as: CN111496586A

Abstract

The invention provides a pipeline polishing device which comprises a crawling mechanism, a polishing mechanism, a rotating mechanism and a shell, wherein the crawling mechanism comprises a linear driving motor and moving component groups respectively arranged at two ends of the shell, and can enable the polishing device to move along the axial direction of a pipeline; the polishing mechanism is arranged in the shell, comprises a plurality of angle grinders, a polishing frame, a plurality of angle grinder fixing pieces and a roller component group, and can polish pipelines; the rotating mechanism comprises a rotating driving motor and an oblique gear set, and can drive the oblique gear set to drive the polishing frame to move circumferentially along the pipeline in the shell and simultaneously reciprocate obliquely along the pipeline; the casing is including setting up the end cover at both ends and setting up the side body board between the end cover, and the middle part of casing is provided with the trompil, and the pipeline can pass through the trompil grinding device. The polishing device disclosed by the invention is wide in application range, short in structural length and suitable for polishing straight pipes with certain curvature and places with limited space.

Description

Pipeline grinding device

Technical Field

The invention relates to the technical field of oil and gas exploitation, in particular to a pipeline polishing device.

Background

Blowout lines are a part of well control devices for oil wells where they play a critical role. As the blowout pipeline is subjected to the effects of fluid scouring, electrochemical corrosion, chemical corrosion and the like of fluid media in the pipeline, the blowout pipeline gradually has the defects of pipe wall thinning, corrosion, cracks and the like, and once leakage failure occurs, serious safety accidents are caused. Therefore, nondestructive testing is required to be performed on the return blowout pipeline periodically to ensure the quality and the operation safety of the pipeline. At present, a commonly used method for detecting a blowout straight pipeline is a magnetic flux leakage detection technology, but before detection, the whole of attachments such as cement, paint, rust and the like of the blowout pipeline needs to be polished so as to ensure the detection correctness. And the open-flow straight pipeline is piled on a material rack after returning to the field, and is firstly polished and then subjected to defect detection by a magnetic flux leakage detection instrument. The polishing space of the blowout straight pipe line is limited, polishing can be carried out only on the material rack, large-scale movement cannot be realized, and only a simple and light polishing mode can be adopted.

At present, the polishing equipment for the excircle of the blowout pipeline is generally polished by a manual handheld polishing machine, for example, a polishing machine with a simple structure is used for manual polishing. A sander generally includes a sanding wheel, a sanding sheet mounted to the sanding wheel, and a motor for driving the sanding sheet in rotation. Under the high-speed rotation of throwing aureola, contact through work piece and the rotatory piece of polishing, with corrosion and paint clean up on the pipeline excircle, this kind of manual sand light mode safety risk of doing is high, and the workman operates and is not very easily leads to hand and throwing aureola contact, causes personnel's injury. The traditional polishing mode is low in efficiency and serious in pollution, the manual polishing workload is large, the labor intensity is high, a large amount of dust and serious noise can be generated in the polishing process, and the health of workers is influenced. Moreover, the sanding quality is poor, and the acting force angle between the hand-held sanding machine and the pipe column of a worker is difficult to grasp, so that the sanding quality is influenced, and the passing performance of the detection equipment is influenced.

In addition, the two ends of the existing open-flow pipeline are connected through flanges, the existing polishing device generally polishes in a pipeline body rotating mode, and although the polishing device can well remove attachments of the pipeline, the pipeline body rotates without protection, and mechanical damage is easily caused. Therefore, the grinding device is only suitable for places where the outer wall of the pipeline does not need to be contacted by people. The invention provides an automatic crawling and polishing device for a blowout straight pipeline, which is suitable for operation in a narrow space position, wherein personnel can directly contact the outer wall of the pipeline.

Disclosure of Invention

In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, one of the objects of the present invention is to provide a grinding device capable of fully automatically grinding a pipeline.

In order to achieve the above object, the present invention provides a pipeline polishing device, which may include a crawling mechanism, a polishing mechanism, a rotating mechanism, and a housing, wherein the crawling mechanism includes a linear driving motor and moving member sets respectively disposed at two ends of the housing, the moving member sets include a plurality of moving members, the plurality of moving members are uniformly distributed along a circumferential direction of a pipeline, each moving member includes a moving wheel and a moving wheel fixing member, one end of each moving wheel fixing member is connected with the moving wheel, the other end of each moving wheel fixing member is connected with an end cover of the housing, and the linear driving motor is connected with at least one moving wheel and drives the moving wheel to rotate so as to enable the polishing device to crawl and move along an axial direction of the pipeline; the grinding mechanism is arranged in the shell and comprises a plurality of angle grinders, a grinding frame, a plurality of angle grinder fixing pieces and a roller member set, each angle grinder is installed on the grinding frame through the angle grinder fixing piece, the angle grinders are uniformly distributed on the outer side of the pipeline along the circumferential direction of the pipeline to grind the pipeline, a hollow structure capable of accommodating the pipeline to pass through is arranged in the middle of the grinding frame, the roller member set comprises a plurality of roller members, and two ends of the grinding frame are connected with the end cover of the shell through the roller members respectively; the rotary mechanism comprises a rotary driving motor and an oblique gear set, the oblique gear set is connected with the polishing frame, and the rotary driving motor can drive the oblique gear set to drive the polishing frame to move circumferentially along the pipeline in the shell and simultaneously reciprocate obliquely along the pipeline; the casing is hollow out construction, including setting up the end cover at both ends and setting up the side body board between the end cover, the middle part of casing is provided with the trompil, the pipeline can pass through the trompil grinding device.

Compared with the prior art, the beneficial effects of the invention can comprise at least one of the following:

(1) the polishing device is wide in application range, can automatically crawl and move along the pipe wall, and avoids mechanical damage caused by self rotation of a pipeline;

(2) the polishing device is short in structural length and suitable for polishing straight pipes with certain curvature and pipelines in places with limited space;

(3) the polishing device is designed into a half-hinge shaft connection mode and is suitable for a straight pipeline with flanges at two ends connected;

(4) the polishing device is flexible in field use and operation, the two half polishing frames of the polishing device are connected through self-locking buckles in the opening and closing processes, the upper buckle is convenient to connect, and the wearing part grinding wheel is convenient to detach;

(5) the polishing device can realize full-circumferential and full-coverage polishing, the polishing device walks along a straight line and simultaneously realizes the autorotation of the polishing machine and the circumferential reciprocating operation at a certain angle, the reciprocating circumferential swinging angle is small, and the circumferential full-coverage polishing is realized;

(6) the polishing device is convenient and fast to design, the whole polishing work can be completed by one-man operation, and a large amount of human resources are prevented from being consumed;

(7) the grinding device is high in grinding efficiency, the crawling speed of the grinding device is controlled by a remote control mechanism of the grinding device through a remote control handle, the crawling speed can be adjusted, the moving crawling speed can be adjusted according to the actual grinding requirement, and the grinding efficiency is improved;

(8) the polishing device disclosed by the invention is full-automatic polishing, can avoid the polishing effect from being influenced by people, ensures the passing performance of detection equipment and improves the detection accuracy.

Drawings

The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

FIG. 1 shows a schematic diagram of a pipeline grinding apparatus according to an exemplary embodiment of the present invention;

FIG. 2 shows a schematic view of a moving wheel mount in the pipeline grinding apparatus of FIG. 1;

FIG. 3 shows a schematic diagram of a grinding frame construction in the pipeline grinding apparatus of FIG. 1;

FIG. 4 shows a schematic view of an angle grinder fixture in the pipeline grinding apparatus of FIG. 1;

FIG. 5 is a schematic diagram of the opening and closing connection assembly of the pipeline polishing apparatus of FIG. 1;

FIG. 6 shows a schematic diagram of a roller member in the pipeline grinding apparatus of FIG. 1;

FIG. 7 illustrates a moving wheel drive assembly in a pipeline grinding apparatus;

FIG. 8 shows a schematic side body plate configuration in the pipeline grinding apparatus of FIG. 1;

figure 9 shows a schematic view of the end cap arrangement in the pipeline grinding apparatus of figure 1.

Description of reference numerals:

1-linear driving motor, 2-moving component, 3-angle grinder, 4-grinding frame, 5-angle grinder fixing component, 6-roller component, 7-rotary driving motor, 8-oblique gear set, 9-shell, 10-hinge shaft, 11-opening and closing connecting component, 12-dust-collecting hole,

2 a-a moving wheel, 2 a-a driving wheel, 2 b-a moving wheel fixing part, 2 b-a moving wheel connecting part, 2 b-a elastic part, 2 b-a moving wheel supporting part, 4 a-a first frame part, 4 b-a second frame part, 4 c-a square opening, 4 d-a vertical clapboard, 4 e-a self-locking buckle, 4 f-a dust suction hole, 5 a-a fixing part opening, 5 b-a mounting edge, 6 a-a roller, 6 b-a sleeve, 6 c-a gasket, 6 d-a bolt, 6 e-a nut, 6 f-a roller bearing, 6 g-a bearing retainer ring, 7 a-a motor supporting part, 7 b-a moving wheel supporting part, 7 c-a first bearing and 7 d-a second bearing, 7 e-shaft sleeve, 7 f-driving bearing retainer ring, 8 a-big helical gear, 8 b-small helical gear, 9 a-end cover, 9 b-side body plate, 11 a-fixing plate, 11 b-supporting piece, 11 c-lock catch, 11 d-lock catch butt-joint piece, 11 e-spring and A-pipeline.

Detailed Description

Hereinafter, a pipeline grinding apparatus according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

Fig. 1 is a schematic structural view of a pipeline grinding apparatus according to an exemplary embodiment of the present invention, in which fig. 1(a) is a sectional view and fig. 1(b) is a schematic structural view of the inside of an open housing. Figure 2 shows a schematic view of the moving wheel mount in the pipeline grinding apparatus of figure 1. Fig. 3 shows a schematic diagram of a grinding frame structure in the pipeline grinding device of fig. 1, wherein fig. 3(a) is a first frame part and fig. 3(b) is a second frame part. FIG. 4 shows a schematic view of the angle grinder fixture structure in the pipeline grinding apparatus of FIG. 1. Figure 5 shows a schematic view of the opening and closing connection assembly of the pipeline grinding apparatus of figure 1. Fig. 6 shows a schematic view of a roller member in the pipeline grinding apparatus of fig. 1. Figure 7 shows a moving wheel drive assembly in a pipeline grinding apparatus. Fig. 8 shows a schematic side body plate structure in the pipeline grinding device of fig. 1, wherein fig. 8(a) is a first side body plate, and fig. 8(b) is a second side body plate. Figure 9 shows a schematic view of the end cap arrangement in the pipeline grinding apparatus of figure 1.

Specifically, the polishing device of the invention comprises a crawling mechanism, a polishing mechanism, a rotating mechanism and a shell. The driving wheel power of the crawling mechanism is driven by a motor to walk linearly along the outer wall of the pipeline. The polishing mechanisms are fixed on the polishing frame at equal intervals through the angle grinder, and the autorotation polishing of the polishing machine is realized. The drive motor of the rotary mechanism drives the oblique gear set to drive the polishing mechanism to circumferentially reciprocate and swing at a certain angle along the outer wall of the pipeline, so that circumferential full-coverage polishing is realized. The end covers pass through the running roller component support around the casing, prevent that the frame of polishing from beating in rotation in-process circumference. With the polishing device, an operator can directly contact the outer wall of the pipeline, and the polishing device is suitable for operation in a narrow space position.

The invention provides a pipeline polishing device. In one exemplary embodiment of the pipeline grinding apparatus of the present invention, the grinding apparatus may include a crawling mechanism, a grinding mechanism, a rotating mechanism, and a housing. The creeping mechanism enables the grinding device to move in the axial direction of the pipeline. The grinding mechanism can realize grinding of pipelines. The rotary mechanism can enable the polishing mechanism to rotate along the circumferential direction of the pipeline and enable the polishing mechanism to axially reciprocate along the pipeline, namely the polishing mechanism can circumferentially rotate and reciprocate along the pipeline at a certain angle, and circumferential full-coverage polishing of the pipeline is realized.

Specifically, as shown in fig. 1(a) and 1(b), the crawling mechanism may include a linear driving motor 1 and moving member groups respectively provided at both ends of a housing. The moving member group may include a plurality of moving members 2 (only one moving member of one end cap of the housing is labeled in fig. 1 (a)). Each moving member includes a moving wheel 2a and a moving wheel holder 2 b. One end of the moving wheel fixing member 2b is connected to the moving wheel 2a for fixing the moving wheel. The other end of the moving wheel holder 2b is connected to the end cap 9a of the housing. The linear driving motor 1 may be a brushless motor. The linear driving motor 1 may be connected to a moving wheel of any one or more of the plurality of moving members for powering the moving wheel connected to the linear driving motor to enable the grinding apparatus to move in the axial direction of the pipeline a. For example, as shown in fig. 1, the linear driving motor 1 is connected to a moving wheel at the lower end of the grinding apparatus for driving the moving wheel to rotate. The moving wheel connected with the linear driving motor 1 is a driving wheel, as shown by a driving wheel 2a-1 in fig. 1 (b).

The sharpening mechanism may be disposed within the housing. The grinding mechanism is capable of rotating along the circumference of the pipeline without rotating the housing along the circumference. The grinding mechanism may include a plurality of angle grinders 3, a grinding frame 4, a plurality of angle grinder fixing members 5, and a roller member group. The number of the angle grinder 3 corresponds to the number of the angle grinder fixing pieces 5. The angle grinders 3 are all arranged on the grinding frame 4 through corresponding angle grinder fixing pieces 5. The plurality of angle grinders 3 are arranged uniformly in the circumferential direction of the pipeline. The angle grinder 3 includes a rotary grinding blade capable of grinding the pipeline. The angle grinder 3 may be an angle grinder commonly used in the art. The polishing frame 4 is of a hollow structure. The middle part of the grinding frame 4 is provided with a hollow structure which can enable a pipeline to penetrate through. The roller member group includes a plurality of roller members 6. The plurality of roller members 6 are respectively provided at both ends of the polishing apparatus. The roller members 6 may be distributed at the outer edges of the hollow structure of the sanding frame 4. One end of the roller component 6 is connected with the end cover of the shell, and the other end of the roller component is connected with the polishing frame 4. The grinding frame 4 is connected with the shell through the roller component 6, so that the grinding frame 4 and the angle grinder 3 can rotate along the circumferential direction of the pipeline under the driving of the rotating mechanism, and the shell does not rotate. For example, as shown in fig. 1, the grinding mechanism comprises 4 angle grinders which are arranged and fixed on a grinding frame at equal intervals along the circumferential direction of a pipeline, and can realize automatic grinding of the grinding machine.

The rotating mechanism may include a rotation driving motor 7 and a tilting gear set 8. The oblique gear set 8 is respectively connected with the driving motor 7 and the grinding frame 4. The rotary driving motor 7 can drive the oblique gear set 8 to drive the movable frame 4 to rotate in the shell. The diagonal gear set 8 may include a large helical gear 8a and a small helical gear 8b connected to each other. The rotary driving motor 7 drives the oblique gear set 8 to drive the polishing mechanism to swing back and forth along the circumferential direction of the outer wall of the pipeline at a certain angle, and circumferential full-coverage polishing is achieved.

The housing 9 may be a hollow structure. The housing 9 may include end caps 9a (only one end of the housing is labeled in fig. 1) disposed at both ends and a skirt plate 9b disposed between the end caps. And the middle part of the shell is provided with an opening through which the pipeline can penetrate through the shell. The openings provided in the housing cooperate with the hollow structures provided in the sanding frame 4 to enable the lines to run through both the housing and the sanding frame. The grinding frame and the angle grinder in the grinding mechanism can rotate and run in the shell, and the shell does not rotate along the circumferential direction of the pipeline.

More than, grinding device drives grinding device and walks along pipeline axis straight line by one or more action wheels, and the angle mill hugs closely the pipeline outer wall and carries out rotation motion, and rotary mechanism drives the angle mill and becomes certain angle circumference reciprocating motion at the pipeline outer wall, realizes that grinding device creeps while polishing.

In this embodiment, an enlarged view of the moving wheel holder is shown in FIG. 2, and the moving wheel holder may include a moving wheel coupling member 2b-1, an elastic member 2b-2, and a moving wheel supporting member 2 b-3. One end of the moving wheel connecting piece 2b-1 is provided with a moving wheel 2a, and the other end is connected with one end of a moving wheel supporting piece 2 b-3. The other end of the moving wheel support 2b-3 is connected to the end cap of the housing. The elastic piece 2b-2 is arranged at the joint of the moving wheel connecting piece 2b-1 and the moving wheel supporting piece 2 b-3. The elastic part 2b-2 can provide a pulling force of the moving wheel connecting part towards the central axis of the pipeline, so that the moving wheel 2a can press the outer wall of the pipeline to enable the grinding device to move axially along the pipeline. Because the both ends equipartition of grinding device has the removal component of a plurality of equidistant settings and passes through the elastic component can make the removal wheel hug closely on the pipeline, consequently, the removal component can support grinding device on the pipeline, can form the support to grinding device. The elastic member may be a spring.

In this embodiment, the grinding frame 4 may be a hollow structure. The sanding frame 4 may be arranged to be made up of a first frame part 4a and a second frame part 4b, which are detachable, as shown in fig. 3. The sanding frame 4 may be provided in the shape of a cylinder. The cross-section of the sanding frame 4 may be provided with transverse metal spacers. A square opening 4c is provided in the transverse metal separator. The square opening 4c may be used to place the angle grinder. Since it is necessary to fix the angle grinder to the grinding frame, the angle grinder fixing member 5 may be provided in a square or rectangular parallelepiped structure as shown in fig. 4. The upper end face of the angle grinder fixing piece is provided with a fixing piece opening 5a, and the fixing piece opening 5a for placing the angle grinder can be arranged corresponding to the opening 4c on the metal partition plate of the grinding frame. The two side edges of the angle grinder fixing piece are provided with mounting edges 5b for arranging the angle grinder fixing piece on the transverse metal partition plate of the grinding frame 4. As shown in fig. 3, 4d is a vertical partition plate. The vertical partition plate is provided with a partition plate groove which can be used for fixing the vertical partition plate. Of course, the formation of the separator grooves may be provided in any shape. In order to facilitate the opening and closing of the first frame part 4a and the second frame part 4b, a hinge shaft 10 (as shown in fig. 1 (b)) is provided at one edge of the first frame part 4a, and opening and closing connection assemblies 11 are provided at both ends of the hinge shaft 10. The hinge axis 10 and the opening and closing connection assembly 11 are able to connect the first frame part and the second frame part. On the side where the hinge axis is provided, an edge of the first frame part and an edge of the second frame part are connected by a hinge. As shown in fig. 3, a self-locking catch 4e is provided at the other edge of the first frame part, which is connected to the other edge of the second frame part by means of the self-locking catch 4 e. The grinding frame is opened and closed through the self-locking buckle.

In this embodiment, as shown in fig. 5, the opening and closing connection assembly may include a fixing plate 11a, a support 11b, a latch 11c, a latch abutment 11d, and a spring 11 e. The lower end surface of the fixing plate 11a is disposed on the end cap of the housing. A latch butt-joint piece 11d, a latch 11c and a support piece 11b are sequentially arranged on the upper end surface of the fixing plate 11 a. The spring 11e is arranged between the latch 11c and the latch abutment 11 d. Support piece 11b is the setting of type of falling L, including the vertical end plate of vertical setting and the horizontal end plate of horizontal setting. One end of the vertical end plate is arranged on the fixing plate 11a, and the other end of the vertical end plate is connected with the transverse end plate. The lock catch 11c, the lock catch butt-joint piece 11d and the spring 11e are all arranged in a space which is semi-enclosed by the vertical end plate and the transverse end plate. The latch 11c is movable to effect opening and closing of the opening and closing connection assembly. One end of the spring 11e is connected with the lock catch 11c, and the other end is connected with the lock catch butt-joint piece 11 d. The circular opening on the fixing plate 11a is a mounting hole for fixing the mounting piece. The opening and closing connecting assembly is connected with the first frame part and the second frame part in a hinge mode and can be opened and closed.

In this embodiment, as shown in fig. 3(a), a dust suction hole 4f (corresponding to reference numeral 12 in fig. 1) is opened in the lower end surface of the grinding frame. The dust suction hole 4f can be externally connected with a dust suction device. The crop which is ground off from the pipeline can be sucked out through the dust suction hole.

In the present embodiment, as shown in fig. 6, the roller member may include a roller 6a, a sleeve 6b, a washer 6c, a bolt 6d, a nut 6e, a roller bearing 6f, and a retainer ring 6 g. A roller bearing 6f and a sleeve 6b are provided in this order from the outside to the inside in the radial direction of the roller 6 a. The retainer ring 6g is provided on an end surface of the roller bearing 6 f. The bolt 6d may be disposed within the sleeve 6 b. The washer 6c is disposed between the bolt 6d and the nut 6 e. The bolt 6d is fitted with a nut 6 e. When the roller component needs to be installed, the roller component is arranged on the polishing frame through the bolts 6d and the nuts 6e, and one end of the roller 6a is connected with the shell cover plate. The polishing frame can rotate along the circumferential direction of the pipeline in the shell through the roller component, and the two end covers of the shell can be supported by the roller component, so that the polishing frame is prevented from circumferentially jumping in the rotating process.

In this embodiment, the abrading device further comprises a moving wheel drive assembly, as shown in figure 7. The moving wheel driving component can enable the linear driving motor 1 to drive the moving wheel (driving wheel) 2a-1 to rotate. The movement drive assembly may include a motor support 7a, a movement wheel support 7b, a first bearing 7c, a second bearing 7d, a sleeve 7e, and a drive land 7 f. One end of the linear driving motor 1 is arranged in the shaft sleeve 7. The first bearing 7c and the second bearing 7d are respectively arranged at two ends of the shaft sleeve and are connected with the movable wheel supporting piece 7 b. The moving wheel 2a-1 is arranged on the shaft sleeve 7 e. The motor support 7a is disposed between the linear driving motor 1 and the moving wheel support 7 b. The linear driving motor 1 can drive the shaft sleeve 7e to rotate, and the moving wheel 2a-1 is driven to rotate through the first bearing 7c and the second bearing 7 d.

In this embodiment, as shown in fig. 8, the side body panels of the housing may include two semi-cylindrical first side body panels (as shown in fig. 8 (a)) and second side body panels (as shown in fig. 8 (b)). The first side body plate and the second side body plate can be both arranged to be hollow structures. The first side body plate and the second side body plate are detachably connected. The fretwork that sets up on first side body board and the second side body board can set up according to internally mounted's angle mill size etc.. The end cover of the shell can be of a hollow structure. Two end parts of the shell are respectively provided with an end cover, and each end cover is respectively provided with two semicircular sub end covers. Each semi-circular sub-end cap is shown in fig. 9. The moving wheel of the moving component can penetrate out of the two crescent-shaped openings arranged on the secondary end cover. Of course, the arrangement of the end cap of the present invention is not limited thereto, and may be arranged according to the internal structure of the polishing apparatus. The first side body plate is matched with the first frame portion, the second side body plate is matched with the second frame portion, the polishing device can be opened in half and half, and the polishing device is suitable for straight pipe lines with flanges at two ends.

In this embodiment, the moving member group may include an even number of moving members of 6 or more. The even number of moving members are disposed at both end portions of the housing. For example, as shown in fig. 1(b), one end of the polishing device may be provided with 3 moving members, each moving member being 120 degrees to each other.

In this embodiment, the roller member set may include even number of roller members more than 8, and the even number of roller members are equally disposed at both ends of the sanding frame, and may connect the sanding frame and the end caps.

In this embodiment, the grinding apparatus may further comprise a remote control mechanism, which may comprise a remote control handle and a speed controller. The speed controller may be provided on the sanding frame. The speed controller can be connected with the linear driving motor of the crawling mechanism and is used for adjusting the rotating speed of the linear driving motor so as to control the crawling speed of the grinding device on a pipeline. The remote control handle may be remotely wirelessly connected to the speed controller for remotely overriding the adjustment of the speed controller.

In this embodiment, the line may be a blowout line.

In conclusion, the polishing device disclosed by the invention is wide in application range, and can be driven to automatically creep and move along the pipe wall, so that mechanical damage caused by rotation of a pipeline is avoided; the grinding device is short in structural length, and is suitable for grinding straight pipe lines with certain curvature and places limited by space and straight pipe lines with flanges at two ends.

Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A pipeline polishing device is characterized in that the polishing device comprises a crawling mechanism, a polishing mechanism, a rotating mechanism and a shell, wherein,

the crawling mechanism comprises a linear driving motor and moving component groups respectively arranged at two ends of the shell, each moving component group comprises a plurality of moving components, the moving components are uniformly distributed along the circumferential direction of the pipeline, each moving component comprises a moving wheel and a moving wheel fixing piece, one end of each moving wheel fixing piece is connected with the corresponding moving wheel, the other end of each moving wheel fixing piece is connected with an end cover of the shell, and the linear driving motor is connected with at least one moving wheel and drives the corresponding moving wheel to rotate so as to enable the polishing device to crawl and move along the axial direction of the pipeline;

the polishing mechanism is arranged in a shell and comprises a plurality of angle grinders, a polishing frame, a plurality of angle grinder fixing pieces and a roller member set, each angle grinder is mounted on the polishing frame through the angle grinder fixing piece, the angle grinders are uniformly distributed on the outer side of a pipeline along the circumferential direction of the pipeline to polish the pipeline, a hollow structure capable of accommodating the pipeline to pass through is arranged in the middle of the polishing frame, the roller member set comprises a plurality of roller members, the polishing frame can rotate in the shell along the circumferential direction of the pipeline through the roller members, and two ends of the polishing frame are connected with end covers of the shell through the roller members respectively;

the rotary mechanism comprises a rotary driving motor and an oblique gear set, the oblique gear set is connected with the polishing frame, and the rotary driving motor can drive the oblique gear set to drive the polishing frame to move circumferentially along the pipeline in the shell and simultaneously reciprocate obliquely along the pipeline so as to polish circumferentially;

the casing is hollow out construction, including setting up the end cover at both ends and setting up the side body board between the end cover, the middle part of casing is provided with the trompil, the pipeline can pass through the trompil grinding device.

2. The pipeline grinding device of claim 1, wherein the movable wheel fixing member comprises a movable wheel connecting member, an elastic member and a movable wheel supporting member, the movable wheel connecting member is fixedly provided with a movable wheel at one end thereof, the other end of the movable wheel connecting member is connected with one end of the movable wheel supporting member, the other end of the movable wheel supporting member is connected with the housing end cover, the elastic member is provided at the joint of the movable wheel connecting member and the movable wheel supporting member, and the elastic member can provide a pulling force towards the pipeline so as to enable the movable wheel to be tightly attached to the pipeline.

3. The pipeline grinding device of claim 1, wherein the grinding frame is of a hollow structure and comprises a first frame part and a second frame part which are detachable, one edge of the first frame part is provided with a hinge shaft, the one edge of the first frame part is hinged with one edge of the second frame part through the hinge shaft, the other edge of the first frame part is connected with the other edge of the second frame part through self-locking, the one edge of the first frame part is arranged opposite to the other edge of the first frame part, and the one edge of the second frame part is arranged opposite to the other edge of the second frame part.

4. The pipeline grinding device according to claim 3, wherein an opening and closing connecting assembly is respectively arranged at two ends of the hinge shaft, the hinge shaft is connected with two end covers of the shell through the opening and closing connecting assembly, the opening and closing connecting assembly comprises a fixing plate, a supporting piece, a lock catch butt-joint piece and a spring, the fixing plate is arranged on an end plate of the shell, the supporting piece is arranged on the fixing plate in an inverted L shape, the lock catch, the spring and the lock catch butt-joint piece are sequentially arranged in an inverted L-shaped space of the supporting piece, the spring is arranged between the lock catch and the lock catch butt-joint piece, the lock catch is arranged on the fixing plate and is arranged in parallel with the supporting piece, and the lock catch can compress the spring to realize opening and closing of the opening and closing connecting assembly.

5. The pipeline grinding device of claim 1, wherein one end of the grinding frame is opened with a dust suction hole through which the additional crop ground off from the pipeline can be sucked out.

6. The pipeline grinding device according to claim 1, wherein the roller member comprises a roller, a sleeve, a gasket, a nut, a bolt, a roller bearing and a bearing retainer ring, wherein the roller, the roller bearing and the sleeve are sequentially arranged from outside to inside along the radial direction of the roller, the bearing retainer ring is arranged on the end face of the roller bearing, the bolt is arranged in the sleeve, the gasket is arranged between the bolt and the nut, the bolt is matched with the nut, one end of the roller member is connected with the shell end cover, the other end of the roller member is connected with the grinding frame, and the grinding frame can rotate in the shell along the circumferential direction of the pipeline through the roller member.

7. The pipeline polishing apparatus of claim 1, further comprising a moving wheel drive assembly, the linear driving motor can drive the moving wheel to rotate through the moving wheel driving component, the moving wheel driving component comprises a motor supporting piece, a moving wheel supporting piece, a first bearing, a second bearing, a shaft sleeve and a bearing retainer ring, wherein one end of the linear driving motor is arranged in the shaft sleeve, the first bearing is arranged at one end of the shaft sleeve and is connected with the movable wheel supporting piece, and a second bearing arranged at the other end of the shaft sleeve and connected with the movable wheel supporting piece, the movable wheel is arranged on the shaft sleeve, the motor supporting piece is arranged between the linear driving motor and the moving wheel supporting piece, and the linear driving motor can drive the shaft sleeve to rotate so as to drive the moving wheel to rotate.

8. The pipeline grinding device of claim 1, wherein the set of moving members comprises an even number of moving members of 6 or more, the even number of moving members being provided at both end portions of the housing, respectively.

9. The pipeline grinding device of claim 1, wherein the set of roller members includes an even number of roller members of 8 or more, the even number of roller members being provided at both end portions of the grinding frame.

10. The pipeline grinding device of claim 1 further comprising a remote control mechanism, the remote control mechanism comprising a remote control handle and a speed controller, the speed controller being coupled to the linear drive motor for controlling the rotational speed of the linear drive motor, the remote control handle being coupled to the speed controller via wireless transmission.