A device for inner hole regrinding of seamless steel pipes

Abstract

The application discloses a seamless steel pipe inner hole grinding equipment, and belongs to the technical field of seamless steel pipe grinding, which comprises a frame and a sliding table. The frame can be inserted into the inside of the seamless steel pipe, and the frame is controlled to move along the axial direction of the seamless steel pipe by using a guide component. A plurality of cross bars are arranged in the middle of the frame, and the sliding table is connected with the cross bars. A guide cylinder is connected to the sliding table. A disc seat is rotatably arranged on the inner side of the guide cylinder. A plurality of grinding strips are slidably arranged on the outer side of the guide cylinder. The grinding strips are in an arc shape. The outer side surface of the grinding strips is in surface contact with the inner wall of the seamless steel pipe. The application can be inserted into the inside of the seamless steel pipe with a small inner diameter. The circumferential synchronous operation of the plurality of grinding heads can realize efficient grinding of the whole circumferential area of the inner wall of the seamless steel pipe. On this basis, the self-cleaning treatment of the outer surface of the grinding head can avoid secondary scratches during the grinding operation, and the application has good stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seamless steel pipe grinding technology, in particular to a seamless steel pipe inner hole grinding equipment. BACKGROUND

[0002] By grinding the seamless steel pipe, the defects on the surface of the steel pipe, such as corrosion pits and cracks, can be removed or reduced, the original design performance of the steel pipe, such as pressure-bearing capacity, flow efficiency and structural integrity, can be restored, and the service life of the pipe component can be prolonged.

[0003] The existing application No. CN202410164641.4 discloses a kind of inner hole grinder of seamless steel pipe and its grinding method, which discloses a scheme for controlling grinding head in the state of being perpendicular to the axis direction of steel pipe, in a continuous rotary manner, to implement grinding on the inner wall of seamless steel pipe, specifically: when using, electronic slide block electric lifting seat moves, lifting seat drives telescopic sleeve to move, and telescopic top rod is driven to move by extrusion spring at the same time, telescopic top rod drives electric polisher to move when electric polisher extrudes to the inner wall of steel pipe, telescopic top rod moves to the inside of telescopic sleeve under the action of extrusion thrust, and extrusion spring is compressed at the same time, when extrusion spring is extruded to a certain extent, telescopic top rod drives extrusion switch to contact telescopic sleeve inner wall, and triggers extrusion switch to control electric polisher to start grinding on the inner wall of steel pipe.

[0004] However, when using the technical solution in the above patent document, the electric components used to adjust the distance between the grinding head and the inner wall of the pipe are installed vertically to the axis of the pipe, and are limited by the size of the grinding head and the driving method, resulting in a large size of the equipment, which requires a higher diameter size of the seamless steel pipe to be processed, and cannot process thinner seamless steel pipes, so the application range is limited. In addition, the dust generated by grinding is easy to adhere to the outer surface of the grinding head, which may cause secondary scratches or affect the surface finish during subsequent inner wall grinding of the seamless steel pipe, thereby reducing the processing quality consistency. Therefore, the present application provides a seamless steel pipe inner hole grinding equipment. SUMMARY

[0005] In order to solve the above problems in the prior art, the purpose of the present application is to provide a seamless steel pipe inner hole grinding equipment, which can be inserted into the inside of a seamless steel pipe with a small inner diameter, and realize efficient grinding of the inner wall of the seamless steel pipe through the synchronous operation of multiple grinding heads. On this basis, the self-cleaning treatment of the outer surface of the grinding head is used to avoid secondary scratches during grinding, and the use stability is good.

[0006] The technical solution adopted by the present application to solve the technical problems is as follows:

[0007] Provided is a seamless steel pipe inner hole grinding device, which comprises a frame and a sliding table, the frame can be inserted into the inside of the seamless steel pipe, a guide component is used to control the movement of the frame along the axis direction of the seamless steel pipe, a plurality of cross bars are arranged in the middle part of the frame, the sliding table is connected with the plurality of cross bars, a guide cylinder is connected on the sliding table, a disc seat is rotatably arranged on the inner side of the guide cylinder, a plurality of grinding strips are slidably arranged on the outer side of the guide cylinder, the grinding strips are arc-shaped as a whole, the outer side of the grinding strips abuts against the inner wall of the seamless steel pipe in a surface contact mode, a J-shaped pin is arranged on the side end of the rod part of the grinding strip, the J-shaped pin is slidably connected with the inclined slot on the disc seat, and a driving component for controlling the movement of the disc seat is arranged on the frame.

[0008] Further, a fixed table is fixedly connected on the plurality of cross bars in the middle part of the frame, a sleeve is connected on the fixed table, a plurality of guide grooves are arranged on the inner side of the sleeve, a plurality of protrusions are fixedly arranged on the outer side of the columnar structure of the side part of the disc seat, and the protrusions are slidably connected with the guide grooves.

[0009] Further, a guide head is slidably arranged on the sleeve, a spring is detachably and fixedly arranged between the guide head and the sleeve, the spring is used to pull the guide head towards the axis direction of the disc seat, the anti-disengagement part of the end part of the guide head can be engaged with the annular groove of the root part of the protrusion, and the one-way sliding of the protrusion is maintained.

[0010] The specific structure of the guide component used in the application is as follows: the guide component comprises a coaxial bearing seat and a plurality of clamping arms which are detachably arranged on the ground in the workshop through a support, the plurality of clamping arms are circumferentially and uniformly arranged on the outer side of the seamless steel pipe, an insertion hole which can penetrate through the frame is arranged on the frame, and the cross bar on the coaxial bearing seat is slidably connected with the insertion hole; at least two pulling rings are detachably and fixedly arranged on the two ends of the frame, a rope is connected with the pulling ring, and the end part of the rope extends to the outer side of the end part of the seamless steel pipe.

[0011] The specific structure of the guide component used in the application is as follows: the guide component comprises a plurality of wheel frames which are circumferentially arranged on the two ends of the side part of the frame, a jacking wheel is rotatably arranged on the wheel frame, the jacking wheel is drum-shaped as a whole, the middle part is thick, and the two ends are thin, and the outer side of the jacking wheel abuts against the inner wall of the seamless steel pipe in a line contact mode.

[0012] Further, an end cover is detachably arranged on one end of the seamless steel pipe, the end cover is arranged on the inner side of the end part of the seamless steel pipe through a plurality of anti-loosening fasteners, a plurality of pipe heads provided with valves are arranged on the end cover in communication; a ring-shaped fence is fixedly arranged on the side of the frame close to the end cover, the trumpet-shaped opening on the ring-shaped fence extends towards the direction close to the end cover, the outer side edge of the ring-shaped fence abuts against the inner wall of the seamless steel pipe; wherein the inner side of the seamless steel pipe, the end surface of the frame, the inner side of the ring-shaped fence and the end surface of the end cover jointly form a heat conducting oil storage cavity.

[0013] Further, the outer side of the frame is fixedly provided with a cover, a plurality of flexible strips are uniformly arranged in the circumferential direction of the cover, the rod part on the polishing strip penetrates through the flexible strip, and the flexible strip is integrally formed with a thick sleeve which is inserted with the outer side of the rod part of the polishing strip.

[0014] The specific structure of the driving component used in the application is an alternative technical solution, which comprises a motor and a rotating ring, the rotating ring is embedded and rotationally connected with the end of the side column structure of the disc seat, the motor is installed on the frame through a driving frame, the output shaft of the motor is connected with a gear through a key, the gear is transmissionally connected with the rack plate of the side of the rotating ring through meshing, and the end of the rack plate is fixedly connected with the sliding table.

[0015] The specific structure of the driving component used in the application is another alternative technical solution, which comprises a linear electric cylinder and a rotating ring, the rotating ring is embedded and rotationally connected with the end of the side column structure of the disc seat, the fixed end of the linear electric cylinder is detachably fixedly connected with the driving frame, and the movable end of the linear electric cylinder is detachably fixedly connected with the rotating ring.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] 1. The seamless steel pipe inner hole polishing equipment provided in the application periodically runs the polishing strip to protrude outward, keeps the abutting state of the polishing strip and the seamless steel pipe and moves axially, retracts the polishing strip inward, keeps the retracted state of the polishing strip and moves axially in the reverse direction, and implements the polishing work on the specified position in the seamless steel pipe, so that the dust adhered to the polishing strip can be smoothly separated from the polishing strip, and the secondary damage to the pipe wall caused by the fact that the metal dust cannot be discharged due to the abutting of the polishing strip and the inner wall of the seamless steel pipe is avoided.

[0018] 2. In the process that the two guide heads on the guide groove are periodically jolted by the protrusion, the contact modes of the protrusion and the inclined surface and the arc surface on the guide head are different, so that when the guide head is popped and reset, there is a certain interval between the guide head and the outer side of the protrusion, and then the situation that the guide head is gradually jolted and then suddenly pops and resets is formed, the different states of the guide head when it is stretched and retracted and the dynamic changes of the movement state of the protrusion at the corner of the guide groove are utilized, strong and short vibrations are generated, the metal dust on the surface of the polishing strip is shaken off, and on the basis of maintaining the simple structure and small size of the equipment, the surface self-cleaning function of the polishing strip is realized.

[0019] 3. The extending direction of the polishing strip is staggered with the axial direction of the seamless steel pipe, in the projection of the axial direction of the seamless steel pipe, the plurality of polishing strips can be in contact with the inner wall of the seamless steel pipe in all directions, and through the continuous polishing work of the polishing strips, the efficient polishing work on the whole region of the inner wall of the seamless steel pipe is realized. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments thereof, when read in connection with the following drawings:

[0021] Figure 1 The overall structure schematic diagram of the grinding strip and the inner hole grinding equipment for seamless steel pipe provided by the embodiment of the application;

[0022] Figure 2 The structure schematic diagram of the seamless steel pipe and the plurality of grinding strips provided by the embodiment of the application;

[0023] Figure 3 The structure schematic diagram of the frame, the sliding table and the fixed table provided by the embodiment of the application Figure 1 ;

[0024] Figure 4 The structure schematic diagram of the frame, the sliding table and the fixed table provided by the embodiment of the application Figure 2 ;

[0025] Figure 5 The structure exploded view of the sliding table, the disc seat and the plurality of grinding strips provided by the embodiment of the application;

[0026] Figure 6 The cross-sectional view of the sliding table, the disc seat and the fixed table provided by the embodiment of the application;

[0027] Figure 7 The cross-sectional view of the sleeve and the guide groove provided by the embodiment of the application;

[0028] Figure 8 The structure schematic diagram of the guide head, the inclined surface and the arc surface provided by the embodiment of the application;

[0029] Figure 9 The partial enlarged view of A in the embodiment of the application Figure 7 ;

[0030] Figure 10 The cross-sectional view of the guide groove and the annular groove provided by the embodiment of the application;

[0031] Figure 11 The structure schematic diagram of the disc seat, the protrusion and the rotating ring provided by the embodiment of the application;

[0032] Figure 12 The structure schematic diagram of the driving frame, the motor, the rotating ring and the rack plate provided by the embodiment of the application;

[0033] Figure 13 The structure schematic diagram of the scraping edge and the reinforcing rib provided by the embodiment of the application;

[0034] Figure 14Structure schematic view of the adapter seat and the plurality of annular fences provided by the embodiment of the present application;

[0035] Figure 15 Structure schematic view of the seamless steel pipe, the frame and the clamping arm provided by the embodiment of the present application;

[0036] Figure 16 Structure schematic view of the frame and the coaxial bearing seat provided by the embodiment of the present application.

[0037] In the figure: 1, seamless steel pipe; 11, frame; 111, pull ring; 112, insertion hole; 12, cover; 121, flexible strip; 13, wheel frame; 14, annular fence; 141, scraping edge; 15, reinforcing rib; 16, adapter seat; 21, sliding table; 22, guide cylinder; 23, polishing strip; 24, I-shaped pin; 25, disc seat; 251, inclined slot; 31, fixed table; 32, sleeve; 33, guide slot; 34, guide head; 341, inclined surface; 342, arc surface; 343, anti-falling edge; 35, protrusion; 351, annular groove; 41, driving frame; 42, motor; 43, rotating ring; 44, rack plate; 51, end cover; 52, pipe head; 53, anti-loosening fastener; 54, clamping arm; 55, coaxial bearing seat. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0039] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0040] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. In addition, it should be noted that only the parts related to the application are shown in the drawings for convenience of description.

[0044] Embodiment one:

[0045] As shown in Figure 1 , Figure 2 , Figure 5 and Figure 6 , the present embodiment provides a seamless steel pipe inner hole grinding equipment, which comprises a frame 11, a sliding table 21 and a fixed table 31, the frame 11 can be inserted into the inside of the seamless steel pipe 1, a plurality of cross bars are arranged in the middle of the frame 11, the sliding table 21 is in sliding connection with the plurality of cross bars, the fixed table 31 is in fixed connection with the plurality of cross bars, a guide cylinder 22 and a sleeve 32 are respectively connected on the sliding table 21 and the fixed table 31, a disc seat 25 is rotatably installed on the inner side of the guide cylinder 22, a plurality of guide grooves 33 are arranged on the inner side of the sleeve 32, a plurality of protrusions 35 are fixedly installed on the outer side of the columnar structure of the side part of the disc seat 25, the protrusions 35 are in embedded sliding connection with the guide grooves 33, a plurality of polishing strips 23 are slidingly installed on the outer side of the guide cylinder 22, the polishing strips 23 are in overall arc shape, the outer side surface of the polishing strips 23 is in surface contact with the inner wall of the seamless steel pipe 1, the polishing strips 23 of different bar part lengths are detachably installed, the distance between the polishing strips 23 and the center of the frame 11 is changed, and the seamless steel pipe 1 of different diameter sizes is adapted for use; a H-shaped pin 24 is detachably and fixedly installed on the side end of the bar part of the polishing strip 23, the H-shaped pin 24 is in embedded sliding connection with the inclined groove 251 on the disc seat 25, and a driving part for controlling the movement of the disc seat 25 is installed on the frame 11.

[0046] As shown in Figure 6 , the middle part of the sliding table 21 is provided with a hole for inserting the end part of the sleeve 32, and the compactness of the overall structure of the equipment is increased on the basis of avoiding collision of the relative movement of the parts of the equipment.

[0047] As shown in Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11The guide groove 33 is composed of two sections of inclined groove and two sections of straight groove connected end to end. The guide head 34 is slidingly installed on the sleeve 32. The guide head 34 and the sleeve 32 are detachably and fixedly installed with a spring. The spring is used to pull the guide head 34 towards the axis of the disc seat 25. The anti-disengagement edge 343 at the end of the guide head 34 can be embedded with the annular groove 351 at the root of the protrusion 35, so as to maintain the one-way sliding of the protrusion 35 and maintain the periodic expansion and contraction movement of the polishing strip 23.

[0048] Specifically, the guide head 34 is provided with an inclined surface 341 and an arc surface 342. The protrusion 35 is in point contact with the inclined surface 341 and in line contact with the arc surface 342. During the sliding of the protrusion 35 in the straight groove of the guide groove 33, the protrusion 35 is in contact with the inclined surface 341, which gradually lifts the guide head 34. The spring is compressed and shrunk. After the protrusion 35 moves to the end of the straight groove, the protrusion 35 is out of contact with the guide head 34. The spring is reset and the guide head 34 is extended again. At this time, the arc surface 342 constitutes part of the inclined groove of the guide groove 33. With the continuous sliding of the protrusion 35, the protrusion 35 slides into another straight groove through the inclined groove. Since the anti-disengagement edge 343 is arranged at the end of the arc surface 342 and can be inserted with the annular groove 351, the protrusion 35 can effectively prevent the guide head 34 from being lifted again, so as to maintain the one-way circulation rotation of the protrusion 35 in the guide groove 33.

[0049] The specific details of using the seamless steel pipe inner hole grinding equipment of the present application are as follows:

[0050] I. Preparation before use;

[0051] According to the inner diameter size of the seamless steel pipe 1, the length of the polishing strip 23 is selected to ensure that the polishing strip 23 can be in contact with the inner wall of the seamless steel pipe 1 in the fully extended state. According to the size of the inner wall polishing area of the seamless steel pipe 1, a specified number of polishing strips 23 are selected to specify the polishing plan of the internal area of the seamless steel pipe 1 or the full area polishing plan.

[0052] II. Implementing polishing work on the specified position inside the seamless steel pipe 1;

[0053] Using the driving part, the disc seat 25 is controlled to move reciprocatingly and axially in the sleeve 32. Under the limiting action of the guide groove 33 and the guide head 34, the protrusion 35 is periodically slid in the guide groove 33 in a single direction, driving the disc seat 25 to move and rotate periodically. During the process, the protrusion 35 periodically jolts the two guide heads 34 on the guide groove 33;

[0054] When the protrusion 35 slides in the straight groove, the slide base 21, the disc seat 25 and the plurality of polishing strips 23 jointly slide along the axis direction of the seamless steel pipe 1, when the protrusion 35 slides in the inclined groove, the disc seat 25 rotates relative to the slide base 21 with its own axis as the axis, the H-shaped pin 24 slides in the inclined groove 251, and the plurality of polishing strips 23 synchronously protrude outward or retract inward;

[0055] The above operation is repeated for multiple times, and the polishing strips 23 are periodically operated to protrude outward, to move axially with the abutting state of the polishing strips 23 and the seamless steel pipe 1 being maintained, to retract inward, and to move axially in the reverse direction with the retracted state of the polishing strips 23 being maintained, so as to perform polishing work on the specified position inside the seamless steel pipe 1; and the dust adhered to the polishing strips 23 can be smoothly separated from the polishing strips 23, so as to avoid the secondary damage to the pipe wall caused by the metal dust being unable to be discharged due to the polishing strips 23 always abutting against the inner wall of the seamless steel pipe 1.

[0056] III. Polishing work is performed on a large range inside the seamless steel pipe 1;

[0057] During the operation of the above step II, the guide component is used to change the axial position of the frame 11 in the seamless steel pipe 1, so as to perform polishing work on a large range inside the seamless steel pipe 1.

[0058] During the periodic jacking of the protrusion 35 on the two guide heads 34 on the guide groove 33, the protrusion 35 and the inclined surface 341 and the arc surface 342 on the guide head 34 are in contact, so that when the guide head 34 is popped and reset, there is a certain interval between the guide head 34 and the outer side of the protrusion 35, and then the guide head 34 is gradually jacked up and then popped and reset, the different states of the guide head 34 during extension and retraction and the dynamic change of the movement state of the protrusion 35 at the corner of the guide groove 33 are used to generate strong and short vibrations to shake off the metal dust on the surface of the polishing strips 23, and the surface self-cleaning function of the polishing strips 23 is realized on the basis of maintaining the simple structure and small size of the equipment;

[0059] In the above step II, the extension direction of the polishing strips 23 is staggered with the axis direction of the seamless steel pipe 1, and the projection of the extension direction of the polishing strips 23 on the axis direction of the seamless steel pipe 1 is shown in the figure, Figure 15 As shown in the figure, the plurality of polishing strips 23 can be in contact with the full range of the inner wall of the seamless steel pipe 1, and through the continuous polishing work of the polishing strips 23, the full-range efficient polishing work on the inner wall of the seamless steel pipe 1 is realized.

[0060] As Figure 1As shown, the outer side of the frame 11 is fixedly mounted with a cover 12, a plurality of flexible strips 121 are uniformly distributed on the circumference of the cover 12, the rod part on the polishing strip 23 penetrates through the flexible strip 121, and the flexible strip 121 is integrally formed with a thick sleeve which is inserted with the outer side of the rod part of the polishing strip 23; the cover 12 is used as a barrier to avoid debris from entering the frame 11 to cause damage to the driving part.

[0061] Embodiment two:

[0062] The same features of the present embodiment as those of embodiment one will not be described herein again. The different scheme of the present embodiment from that of embodiment one is that: in the present embodiment, the guide part comprises wheel frames 13 which are circumferentially distributed on both ends of the side part of the frame 11, and the wheel frames 13 are rotatably mounted with jacks which are drum-shaped as a whole, thick in the middle and thin at both ends, and the outer side of the jack is in line contact with the inner wall of the seamless steel pipe 1, so that the frame 11 has good stability in movement in the seamless steel pipe 1; and some of the jacks are driven to rotate by using micro motors to drive the frame 11 to move axially in the seamless steel pipe 1.

[0063] Embodiment three:

[0064] The same features of the present embodiment as those of embodiment one will not be described herein again. The different scheme of the present embodiment from that of embodiment one is that: as shown in Figure 15 and Figure 16 the present embodiment, the guide part comprises a co-axial bearing seat 55 and a plurality of clamping arms 54 which are detachably mounted on the workshop floor by a support, the plurality of clamping arms 54 are uniformly distributed on the outer side of the seamless steel pipe 1, the frame 11 is provided with a jack hole 112 which can penetrate through the frame 11, and the cross bar on the co-axial bearing seat 55 is in sliding connection with the jack hole 112 by plug-in connection; and at least two pull rings 111 are detachably fixedly mounted on both ends of the frame 11, the pull rings 111 are connected with ropes, and the end part of the rope extends to the outer side of the end part of the seamless steel pipe 1.

[0065] The ropes corresponding to the two sides of the frame 11 are connected with a plurality of winches respectively, the winches are started, the length of the ropes on both sides of the frame 11 is adjusted, and the frame 11 is controlled to move along the axial direction of the seamless steel pipe 1; in this process, the seamless steel pipe 1 is clamped by the plurality of clamping arms 54, the co-axial bearing seat 55 is used as a guide for the sliding of the frame 11, so that the co-axial bearing seat 55 and the outer side of the seamless steel pipe 1 maintain a co-axial state, and since the protruding distances of the plurality of polishing strips 23 relative to the frame 11 are consistent, the coaxiality of the inner and outer sides of the seamless steel pipe 1 can be repaired in the process of polishing the inner wall of the seamless steel pipe 1, the kinetic performance of the fluid in the seamless steel pipe 1 is optimized, and the problems of eccentric load and stress concentration caused by the single-side stress of the seamless steel pipe 1 are avoided.

[0066] Compared with the operation mode of the second embodiment, the above scheme of the present embodiment can adapt to the use requirement of the seamless steel pipe 1 with a longer length, and ensure the stable placement of the equipment at the specified position inside the seamless steel pipe 1.

[0067] Embodiment Four

[0068] The features same as those of the second embodiment are not repeated herein, and the scheme different from the second embodiment is that, as shown in Figure 1 and Figure 13 In the present embodiment, one end of the seamless steel pipe 1 is detachably installed with an end cover 51, a plurality of anti-loosening fasteners 53 are threadedly engaged on the inner side of the end cover 51, and an engineering rubber pad is arranged at the end of the anti-loosening fastener 53, which can be tightly fitted with the inner side of the seamless steel pipe 1; a plurality of pipe heads 52 with valves are communicatively arranged on the end cover 51; an annular coaming 14 is fixedly installed on the side of the frame 11 close to the end cover 51, the horn-shaped opening on the annular coaming 14 extends towards the end cover 51, and the outer side edge of the annular coaming 14 abuts against the inner wall of the seamless steel pipe 1; wherein the inner side of the seamless steel pipe 1, the end face of the frame 11, the inner side of the annular coaming 14 and the end face of the end cover 51 jointly form a heat conducting oil storage cavity.

[0069] The pipe head 52 is connected in communication with a heat conducting oil delivery pump through a rubber pressure pipeline, the heat conducting oil delivery pump is started to inject or discharge the heat conducting oil into the heat conducting oil storage cavity, and the liquid pressure of the heat conducting oil is used to drive the annular coaming 14 and the frame 11 to move axially in the seamless steel pipe 1.

[0070] Compared with the operation mode of the third embodiment, the above scheme of the present embodiment can use the filling of the heat conducting oil to isolate the polishing area from the oxygen after polishing the inner wall of the seamless steel pipe 1; in addition, the heat conducting oil is used as the filling medium to perform the local annealing treatment on the seamless steel pipe 1, so as to eliminate the stress residual problem caused in the cold drawing or welding process and repair the mechanical properties of the seamless steel pipe 1.

[0071] In order to maintain the sealing between the annular coaming 14 and the seamless steel pipe 1, as shown in Figure 1 and Figure 13 The reinforcing rib 15 is embeddedly installed in the inside of the annular coaming 14, which is used to limit the inward bending deformation of the annular coaming 14 made of the engineering rubber material, so that the outer side edge of the annular coaming 14 keeps in abutment with the inner wall of the seamless steel pipe 1 and maintains the internal closure of the heat conducting oil storage cavity.

[0072] In order to deal with the more complex surface condition of the inner wall of the seamless steel pipe 1 after long-term use, the polishing repair treatment is performed thereon, as shown in Figure 14As shown, the annular surrounding plates 14 are provided with a plurality of annular surrounding plates 14 connected by the connecting seats 16, and the coaxial arrangement of the plurality of annular surrounding plates 14 blocks the pressure oil injected into the seamless steel pipe 1, thereby increasing the sealing performance of the heat conducting oil storage cavity.

[0073] As shown, the annular surrounding plates 14 are provided with a plurality of annular surrounding plates 14 connected by the connecting seats 16, and the coaxial arrangement of the plurality of annular surrounding plates 14 blocks the pressure oil injected into the seamless steel pipe 1, thereby increasing the sealing performance of the heat conducting oil storage cavity.

[0074] Embodiment Five:

[0075] The same features of the present embodiment as those of Embodiment One will not be described herein. The different scheme of the present embodiment from Embodiment One is that, as shown in Figure 3 、 Figure 4 、 Figure 11 and Figure 12 As shown, the driving component includes a motor 42 and a rotating ring 43, the rotating ring 43 is rotatably connected with the end of the cylindrical structure of the side of the disc seat 25; the motor 42 is installed on the frame 11 through a driving frame 41, the output shaft of the motor 42 is connected with a gear through a key, and the gear is drivingly connected with a rack plate 44 on the side of the rotating ring 43 through meshing.

[0076] The end of the rack plate 44 is fixedly connected with the sliding table 21, and since the sliding table 21 is slidingly connected with the plurality of horizontal rods on the frame 11, the rack plate 44 will not rotate around the axis of the frame 11, so as to maintain the stable meshing state between the rack plate 44 and the gear.

[0077] In the present embodiment, the operation details of the driving component are as follows:

[0078] Start the motor 42 to control the gear to rotate around its own axis, and utilize the meshing transmission between the gear and the rack plate 44 to make the rotating ring 43 reciprocate along the axis direction of the seamless steel pipe 1, drive the sliding table 21, the disc seat 25 and the plurality of polishing strips 23 to slide relative to the frame 11, and under the limiting and guiding action of the plurality of protrusions 35 and the plurality of annular grooves 351, make the disc seat 25 rotate around its own axis relative to the sliding table 21, and control the plurality of polishing strips 23 to synchronously extend or contract relative to the frame 11.

[0079] Using the above scheme of the present embodiment, because the cross bar on the frame 11 is close to the edge of the frame 11, the space for installing the motor 42 inside the frame 11 accounts for a high proportion, compared with the control mode of the polishing element in the patent document in the background art for adjusting the radial position inside the seamless steel pipe 1, the application optimizes the driving control mode, reduces the overall volume of the equipment, so that the equipment can be inserted into the inside of the seamless steel pipe with small inner diameter, and the polishing strip 23 with different rod lengths can be disassembled to adapt to the seamless steel pipe 1 with different diameter sizes; the motor 42 can use the integrated low-voltage servo motor of NiMotion PMM series, adopt RS485 communication control, have the functions of speed regulation and vibration suppression, and the specific model is adjusted according to the surface roughness and pipe diameter adaptability of the seamless steel pipe 1.

[0080] As shown in Figure 3 and Figure 4 , the driving component is provided with two, and the two driving components are oppositely installed inside the end of the frame 11, which plays a role in balancing the center of gravity, so that the overall center of gravity of the equipment is located in the middle of the seamless steel pipe 1 during operation, avoiding the damage of the inner wall structure of the seamless steel pipe 1 caused by irregular twisting of the equipment inside the seamless steel pipe 1.

[0081] Embodiment six:

[0082] The same features of the present embodiment as those of embodiment one will not be described again. The scheme different from that of embodiment one in the present embodiment is that: in the present embodiment, the driving component includes a linear electric cylinder and a rotating ring 43, the rotating ring 43 is embedded and rotationally connected with the end of the cylindrical structure of the side of the disc seat 25; the fixed end of the linear electric cylinder is detachably fixedly connected with the driving frame 41, the movable end of the linear electric cylinder is detachably fixedly connected with the rotating ring 43, and the installation direction of the linear electric cylinder is parallel to the axis direction of the seamless steel pipe 1; the linear electric cylinder can be selected from the MCE series products of the robot micro servo cylinder of DaHuan or the AA3100 series micro electric cylinder of Beifang.

[0083] In the present embodiment, the operation details of the driving component are as follows:

[0084] Start the linear electric cylinder, control the rotating ring 43 to reciprocate along the axis direction of the seamless steel pipe 1, drive the sliding table 21, the disc seat 25 and the plurality of polishing strips 23 to slide relative to the frame 11, and under the limiting and guiding action of the plurality of protrusions 35 and the plurality of annular grooves 351, make the disc seat 25 rotate relative to the sliding table 21 with its own axis as the axis, and control the plurality of polishing strips 23 to synchronously extend or contract relative to the frame 11.

[0085] Compared with the operation mode of embodiment five, using the above scheme of the present embodiment, the number of internal components of the equipment can be reduced, thereby optimizing the overall manufacturing cost and use cost of the equipment.

[0086] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

[0087] In addition to the technical features described in the specification, the remaining technical features are known to those skilled in the art. In order to highlight the innovative features of the present application, the remaining technical features will not be described here.

Claims

1. A device for internal hole dressing of seamless steel pipes, characterized in that, The frame (11) is capable of being inserted into the seamless steel pipe (1), and the slide table (21) and the fixed table (31) are connected to the frame (11), and the guide component is used for controlling the axial movement of the frame (11) along the seamless steel pipe (1); The middle part of the frame (11) is provided with a plurality of cross bars, the slide table (21) is slidably connected with the cross bars, the fixed table (31) is fixedly connected with the cross bars, the slide table (21) and the fixed table (31) are respectively connected with a guide cylinder (22) and a sleeve (32), and the inner side of the guide cylinder (22) is rotatably installed with a disc seat (25); The outer side of the guide cylinder (22) at the end of the slide table (21) is slidably installed with a plurality of polishing strips (23) capable of acting on the inner wall of the seamless steel pipe (1), the rod side end of the polishing strip (23) is provided with an I-shaped pin (24), the I-shaped pin (24) is slidably connected with the inclined slot (251) on the disc seat (25), and the frame (11) is installed with a driving component for controlling the movement of the disc seat (25); The inner side of the sleeve (32) at the middle part of the fixed table (31) is provided with a guide slot (33), the outer side of the side part column structure of the disc seat (25) is fixedly installed with a protrusion (35), and the protrusion (35) is slidably connected with the guide slot (33); The sleeve (32) is slidably installed with a guide head (34) for keeping the protrusion (35) in one-way sliding, the guide head (34) is correspondingly arranged at the corner of the guide slot (33), a spring is arranged between the guide head (34) and the sleeve (32) for pulling the guide head (34) to the axis direction of the disc seat (25), and the anti-falling edge (343) at the end of the guide head (34) can be embedded with the annular groove (351) at the root of the protrusion (35); The guide slot (33) is composed of two sections of inclined slots and two sections of straight slots connected in a head-to-tail mode, the sleeve (32) is slidably installed with the guide head (34), the guide head (34) and the sleeve (32) are detachably and fixedly installed with the spring for pulling the guide head (34) to the axis direction of the disc seat (25), the anti-falling edge (343) at the end of the guide head (34) can be embedded with the annular groove (351) at the root of the protrusion (35), and the one-way sliding of the protrusion (35) is kept; The guide head (34) is provided with an inclined surface (341) and an arc surface (342), the protrusion (35) is in point contact with the inclined surface (341), and the protrusion (35) is in line contact with the arc surface (342).

2. The apparatus for honing the inside of a seamless steel pipe according to claim 1, wherein The guide component comprises a wheel frame (13), a plurality of wheel frames (13) are circumferentially distributed at both ends of the side part of the frame (11), a jacking wheel is rotatably installed on the wheel frame (13), and the outer side surface of the jacking wheel is in line contact with the inner wall of the seamless steel pipe (1).

3. The apparatus for honing the inside of a seamless steel pipe according to claim 1, wherein The guide component comprises a same bearing support (55) and a plurality of clamping arms (54) which are detachably installed on the workshop ground through a support, the plurality of clamping arms (54) are circumferentially and uniformly arranged on the outer side of the seamless steel pipe (1), the frame (11) is provided with an insertion hole (112) capable of penetrating the frame (11), and the cross bar on the same bearing support (55) is slidably connected with the insertion hole (112); Two pull rings (111) are detachably fixed at two ends of the frame (11), and a rope is connected to the pull rings (111), and ends of the rope extend to outside of the end of the seamless steel pipe (1).

4. The apparatus for honing the inside of a seamless steel pipe according to claim 2, wherein One end of the seamless steel pipe (1) is connected with an end cover (51) through a plurality of anti-loosening fasteners (53), and a plurality of pipe heads (52) with valves are arranged on the end cover (51). The frame (11) is fixedly installed with a ring-shaped fence (14) close to the end cover (51), the horn-shaped opening of the ring-shaped fence (14) extends towards the end cover (51), and the outer edge of the ring-shaped fence (14) abuts against the inner wall of the seamless steel pipe (1); the inner side of the seamless steel pipe (1), the end face of the frame (11), the inner side of the ring-shaped fence (14) and the end face of the end cover (51) jointly form a heat conducting oil storage cavity.

5. The apparatus for honing the inside of a seamless steel pipe according to claim 1, wherein The outer side of the frame (11) is fixedly installed with a cover (12), a plurality of flexible strips (121) are uniformly arranged on the circumference of the cover (12), the rod portion of the polishing strip (23) penetrates through the flexible strip (121), and the flexible strip (121) is integrally formed with a thick sleeve which is inserted with the outer side of the rod portion of the polishing strip (23).

6. The apparatus for honing the inside of a seamless steel pipe according to claim 4, wherein The ring-shaped fence (14) is embedded with a reinforcing rib (15).

7. The apparatus for honing the inside of a seamless steel pipe according to claim 6, wherein The ring-shaped fence (14) is provided with a plurality of ring-shaped fences (14), and the plurality of ring-shaped fences (14) are connected through a linking seat (16).

8. The apparatus for honing the inside of a seamless steel pipe according to claim 7, wherein The outer side of the ring-shaped fence (14) located in the middle is fixedly installed with a scraping edge (141), the outer edge of the scraping edge (141) abuts against the inner wall of the seamless steel pipe (1), and the horn-shaped opening of the scraping edge (141) extends towards the frame (11).

9. The apparatus for honing the inside of a seamless steel pipe according to claim 1, wherein The driving component comprises a motor (42) and a rotating ring (43), and the rotating ring (43) is embedded and rotationally connected with the end of the side column structure of the disc seat (25); The motor (42) is installed on the frame (11) through a driving frame (41), the output shaft of the motor (42) is connected with a gear through a key, the gear is transmissionally connected with a rack plate (44) on the side of the rotating ring (43) through meshing, and the end of the rack plate (44) is fixedly connected with the sliding table (21).

10. The apparatus for honing the inside of a seamless steel pipe according to claim 1, wherein The driving component comprises a linear electric cylinder and a rotating ring (43), and the rotating ring (43) is embedded and rotationally connected with the end of the side column structure of the disc seat (25); The fixed end of the linear electric cylinder is detachably fixedly connected with the driving frame (41), and the movable end of the linear electric cylinder is detachably fixedly connected with the rotating ring (43).

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