Seamless steel tube inner hole coping equipment

Abstract

The invention discloses seamless steel tube inner hole coping equipment, which belongs to the technical field of seamless steel tube coping, and structurally comprises a frame and a sliding table, the frame can extend into a seamless steel tube, a guide part is used for controlling the frame to move along the axis direction of the seamless steel tube, a plurality of cross rods are arranged in the middle of the frame, and the sliding table is connected with the plurality of cross rods. A guide cylinder is connected to the sliding table, a disc seat is rotatably mounted on the inner side of the guide cylinder, a plurality of polishing strips are slidably mounted on the outer side of the guide cylinder, the polishing strips are integrally arc-shaped, and the outer side surfaces of the polishing strips abut against the inner wall of the seamless steel pipe in a surface contact manner; the polishing device can extend into the seamless steel pipe with the small inner diameter size, efficient polishing operation of the whole circumferential area of the inner wall of the seamless steel pipe is achieved through circumferential synchronous operation of the multiple polishing heads, on the basis, secondary scratching during polishing operation is avoided through self-cleaning treatment of the outer surfaces of the polishing heads, and the use stability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of seamless steel pipe grinding, and specifically relates to an inner hole grinding device for seamless steel pipes. Background Art

[0002] By grinding seamless steel pipes, defects on the surface of the steel pipes, such as corrosion pits and cracks, can be removed or reduced, and their original design performance, such as pressure-bearing capacity, flow efficiency, and structural integrity, can be restored, and the service life of pipeline components can be extended. There is a prior inner hole grinding machine for seamless steel pipes and its grinding method with the application number CN202410164641.4. In this patent document, a solution is disclosed in which a grinding head is in a state perpendicular to the axis of the steel pipe and grinds the inner wall of the seamless steel pipe in a continuously rotating manner. Specifically: during use, an electronic slider drives an electric lifting seat to move, the lifting seat drives a telescopic sleeve to move, and at the same time, a compression spring drives a telescopic ejector rod to move. The telescopic ejector rod drives an electric grinder to move. When the electric grinder presses against the inner wall of the steel pipe, the telescopic ejector rod moves into the telescopic sleeve under the reaction force of the extrusion thrust, and at the same time compresses the compression spring. When the compression spring is compressed to a certain extent, the telescopic ejector rod drives an extrusion switch to contact the inner wall of the telescopic sleeve, and triggers the extrusion switch to control the electric grinder to start grinding the inner wall of the steel pipe. However, when using the technical solution in the above patent document, the installation direction of the electric component for adjusting the distance between the grinding head and the inner wall of the pipe is perpendicular to the axis of the pipe, and due to the volume and driving method limitations of the grinding head itself, the volume of the equipment is large, resulting in relatively high requirements for the diameter size of the seamless steel pipes that can be processed, and it is impossible to process thinner seamless steel pipes, so the application range is relatively limited; in addition, the dust generated during grinding is easily attached to the outer surface of the grinding head, resulting in secondary scratches or affecting the surface finish during subsequent inner wall grinding of seamless steel pipes, reducing the consistency of processing quality. Therefore, the present application provides an inner hole grinding device for seamless steel pipes. Summary of the Invention

[0003] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an inner hole grinding device for seamless steel pipes, which can penetrate into seamless steel pipes with a smaller inner diameter size, and achieve efficient grinding of the entire circumferential area of the inner wall of the seamless steel pipe through the circumferential synchronous operation of multiple grinding heads. On this basis, through the self-cleaning treatment of the outer surface of the grinding head, secondary scratches during grinding operations can be avoided, and the use stability is good.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A seamless steel pipe inner hole grinding device is provided, which includes a frame and a sliding table. The frame can penetrate into the inside of the seamless steel pipe, and a guiding component is used to control the movement of the frame along the axial direction of the seamless steel pipe. Multiple cross bars are arranged in the middle of the frame, and the sliding table is connected to the multiple cross bars. A guide cylinder is connected to the sliding table. A disc seat is rotatably installed inside the guide cylinder, and multiple grinding bars are slidably installed on the outside of the guide cylinder. The grinding bars are integrally arc-shaped, and the outer side surfaces of the grinding bars are in surface contact with the inner wall of the seamless steel pipe. A shaped pin is arranged on the side end of the rod part of the grinding bar, and the shaped pin is in sliding fit with the inclined groove on the disc seat. A driving component for controlling the movement of the disc seat is installed on the frame.

[0005] Further, fixing platforms are fixedly connected to the multiple cross bars in the middle of the frame, sleeves are connected to the fixing platforms, multiple guiding grooves are arranged inside the sleeves, and multiple protrusions are fixedly installed on the outside of the cylindrical structure on the side of the disc seat. The protrusions are in sliding fit with the guiding grooves.

[0006] Further, a guiding head is slidably installed on the sleeve, a spring is detachably and fixedly installed between the guiding head and the sleeve, and the spring is used to pull the guiding head towards the axis direction of the disc seat. The anti-detachment edge at the end of the guiding head can be engaged with the annular groove at the root of the protrusion to maintain the one-way sliding of the protrusion.

[0007] For the specific structure of the guiding component used in this application, an optional technical solution is: the guiding component includes a same-bearing support seat and multiple clamping arms that are detachably installed on the workshop floor through brackets. The multiple clamping arms are circumferentially and evenly arranged on the outside of the seamless steel pipe. There are jacks on the frame that can penetrate the frame, and the cross bar on the same-bearing support seat is in plug-in sliding connection with the jacks; at least two pulling rings are respectively and detachably and fixedly installed at both ends of the frame, ropes are connected to the pulling rings, and the ends of the ropes extend to the outside of the end of the seamless steel pipe.

[0008] For the specific structure of the guiding component used in this application, another optional technical solution is: the guiding component includes wheel frames, and multiple wheel frames are circumferentially distributed at both ends of the side of the frame. Tightening wheels are rotatably installed on the wheel frames. The tightening wheels are integrally drum-shaped, thick in the middle and thin at both ends. The outer side surfaces of the tightening wheels are in line contact with the inner wall of the seamless steel pipe.

[0009] Further, an end cover is detachably installed at one end of the seamless steel pipe. The end cover is installed inside the end of the seamless steel pipe through multiple anti-loosening fasteners. Multiple pipe heads with self-contained valves are communicated with the end cover; an annular enclosure is fixedly installed on one side of the frame close to the end cover. The flared opening on the annular enclosure extends towards the direction close to the end cover, and the outer edge of the annular enclosure is in contact with the inner wall of the seamless steel pipe; among them, the inner side surface of the seamless steel pipe, the end surface of the frame, the inner side surface of the annular enclosure and the end surface of the end cover jointly enclose a heat-conducting oil storage cavity.

[0010] Furthermore, a cover is fixedly installed on the outer side of the frame, and a plurality of flexible strips are evenly distributed around the cover. The rod on the grinding strip passes through the flexible strip, and a thick cover is integrally formed on the flexible strip and plugged into the outer side surface of the rod of the grinding strip.

[0011] The specific structure of the driving component used in the present application, an optional technical solution is: the driving component includes a motor and a swivel, the swivel is engaged and rotatably connected with the end of the cylindrical structure on the side of the disk seat; the motor is installed on the frame through the driving frame, the output shaft of the motor is connected to the gear through a key, the gear is connected to the rack plate on the side of the swivel through meshing transmission, and the end of the rack plate is fixedly connected to the slide.

[0012] The specific structure of the driving component used in the present application, another optional technical solution is: the driving component includes a linear electric cylinder and a swivel, the swivel is rotatably engaged with the end of the cylindrical structure on the side of the disk seat; the fixed end of the linear electric cylinder is detachably fixedly connected to the driving frame, and the movable end of the linear electric cylinder is detachably fixedly connected to the swivel.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The inner hole grinding equipment of the seamless steel pipe of the example of the present invention periodically operates to push out the grinding bar, keep the grinding bar in contact with the seamless steel pipe and move axially, retract the grinding bar inward, keep the grinding bar in the retracted state and move axially in the opposite direction, so as to perform grinding operation on the designated position inside the seamless steel pipe; the dust attached to the grinding bar can be smoothly separated from the grinding bar, so as to avoid the grinding bar always contacting with the inner wall of the seamless steel pipe, resulting in the inability to discharge the metal dust and causing secondary damage to the pipe wall.

[0014] 2. In the inner hole grinding equipment of seamless steel pipe of the example of the present invention, during the process of periodic pushing of the two guide heads on the guide groove by the protrusion, the different contact modes between the protrusion and the inclined surfaces and arc surfaces on the guide heads are utilized so that when the guide heads pop out and reset, there is a certain distance between them and the outer side surfaces of the protrusions, thereby forming a situation in which the guide heads are gradually pushed up and then suddenly pop out and reset. By utilizing the different states of the guide heads during extension and contraction and the dynamic changes of the movement states of the protrusions at the corners of the guide grooves, strong and short vibrations are generated to shake off the metal dust on the surface of the grinding strip, thereby realizing the surface self-cleaning function of the grinding strip while maintaining the simple structure and compact size of the overall equipment.

[0015] 3. In the seamless steel pipe inner hole grinding equipment of the example of the present invention, the extension direction of the grinding strips is staggered with the axial direction of the seamless steel pipe. As shown in the projection in the axial direction of the seamless steel pipe, multiple grinding strips can contact the inner wall of the seamless steel pipe in all directions. Through the continuous grinding operation of the grinding strips, efficient grinding operation of the inner wall of the seamless steel pipe is achieved in the entire circumference. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects, and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 Schematic diagram of the overall structure of the grinding strip and the seamless steel pipe inner hole grinding equipment provided by the embodiment of the present invention; Figure 2 Schematic diagram of the seamless steel pipe and multiple grinding strips provided by the embodiment of the present invention; Figure 3 Schematic diagram of the frame, sliding table, and fixed table provided by the embodiment of the present invention Figure 1 ; Figure 4 Schematic diagram of the frame, sliding table, and fixed table provided by the embodiment of the present invention Figure 2 ; Figure 5 Exploded view of the structure of the sliding table, disc seat, and multiple grinding strips provided by the embodiment of the present invention; Figure 6 Cross-sectional view of the sliding table, disc seat, and fixed table provided by the embodiment of the present invention; Figure 7 Cross-sectional view of the sleeve and the guiding groove provided by the embodiment of the present invention; Figure 8 Schematic diagram of the structure of the guiding head, inclined surface, and arc surface provided by the embodiment of the present invention; Figure 9 For the present invention Figure 7 Partial enlarged view at A in; Figure 10 Cross-sectional view of the guiding groove and the annular groove provided by the embodiment of the present invention; Figure 11 Schematic diagram of the structure of the disc seat, protrusion, and rotating ring provided by the embodiment of the present invention; Figure 12 Schematic diagram of the structure of the driving frame, motor, rotating ring, and rack plate provided by the embodiment of the present invention; Figure 13 Schematic diagram of the structure of the scraping edge and the reinforcing rib provided by the embodiment of the present invention; Figure 14 Schematic diagram of the structure of the connecting seat and multiple annular enclosing plates provided by the embodiment of the present invention; Figure 15 Schematic diagram of the structure of the seamless steel pipe, frame, and clamping arm provided by the embodiment of the present invention; Figure 16 Schematic diagram of the structure of the frame and the same-bearing support provided by the embodiment of the present invention.

[0017] In the figure: 1, seamless steel pipe; 11, frame; 111, pulling ring; 112, jack; 12, cover; 121, flexible strip; 13, wheel carrier; 14, annular baffle; 141, scraping edge; 15, reinforcing rib; 16, connecting seat; 21, sliding table; 22, guide cylinder; 23, grinding strip; 24, I-shaped pin; 25, disc seat; 251, inclined groove; 31, fixed table; 32, sleeve; 33, guiding groove; 34, guiding head; 341, inclined surface; 342, arc surface; 343, anti-detachment 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, same-bearing support seat. Detailed implementation mode

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0019] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0020] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Additionally, it should also be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

[0024] Embodiment 1: As Figure 1 , Figure 2 , Figure 5 and Figure 6 shown, this embodiment provides an internal hole grinding device for seamless steel pipes, including a frame 11, a slide table 21 and a fixed table 31. The frame 11 can penetrate into the inside of the seamless steel pipe 1. A plurality of cross bars are arranged in the middle of the frame 11. The slide table 21 is slidably connected to the plurality of cross bars, and the fixed table 31 is fixedly connected to the plurality of cross bars. A guide cylinder 22 and a sleeve 32 are respectively connected to the slide table 21 and the fixed table 31. A disc seat 25 is rotatably installed inside the guide cylinder 22. A plurality of guiding grooves 33 are provided inside the sleeve 32. A plurality of protrusions 35 are fixedly installed on the outer side of the cylindrical structure on the side of the disc seat 25. The protrusions 35 are in sliding fit with the guiding grooves 33. A plurality of grinding bars 23 are slidably installed on the outer side of the guide cylinder 22. The grinding bars 23 are integrally arc-shaped. The outer side surface of the grinding bars 23 abuts against the inner wall of the seamless steel pipe 1 in a surface contact manner. By disassembling the grinding bars 23 with different rod lengths and changing the distance between the grinding bars 23 and the center of the frame 11, it is adapted to be used with seamless steel pipes 1 of different diameter sizes. A T-shaped pin 24 is detachably and fixedly installed at the side end of the rod part of the grinding bar 23. The T-shaped pin 24 is in sliding fit with the inclined groove 251 on the disc seat 25. A driving component for controlling the movement of the disc seat 25 is installed on the frame 11.

[0025] As Figure 6 shown, a hole for inserting the end of the sleeve 32 is provided in the middle of the slide table 21, which increases the overall structural compactness of the device on the basis of avoiding collisions during the relative movement of the various components of the device.

[0026] As Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 , the guiding groove 33 is formed by connecting two sections of inclined grooves and two sections of straight grooves end to end. A guiding head 34 is slidably installed on the sleeve 32. A spring is detachably and fixedly installed between the guiding head 34 and the sleeve 32. The spring is used to pull the guiding head 34 towards the axis direction of the disc seat 25. The anti-disengagement edge 343 at the end of the guiding head 34 can be engaged with the annular groove 351 at the root of the protrusion 35 to maintain the one-way sliding of the protrusion 35 and maintain the periodic telescopic movement of the grinding bar 23.

[0027] Specifically, a bevel surface 341 and a cambered surface 342 are provided on the seeker 34. The protrusion 35 abuts against the bevel surface 341 in a point contact manner, and the protrusion 35 abuts against the cambered surface 342 in a line contact manner. During the sliding process of the protrusion 35 in the straight groove of the guiding groove 33, the protrusion 35 contacts the bevel surface 341, gradually jacks up the seeker 34, the spring is compressed and contracted. After the protrusion 35 moves to the end of the straight groove, it disengages from the seeker 34, the spring resets, and the seeker 34 extends again. At this time, the cambered surface 342 forms a part of the inclined groove on the guiding groove 33. As the protrusion 35 continues to slide, the protrusion 35 slides into another straight groove through the inclined groove. Since the anti-detachment edge 343 is provided at the end of the cambered surface 342 and can be inserted into the annular groove 351, it can effectively prevent the protrusion 35 from jacking up the seeker 34 again to maintain the one-way cyclic rotation of the protrusion 35 in the guiding groove 33.

[0028] The specific details of using the seamless steel pipe inner hole grinding equipment of the present application are as follows; I. Preparation before use; According to the inner diameter size of the seamless steel pipe 1, select a grinding strip 23 with an appropriate length to ensure that the grinding strip 23 can abut against the inner side wall of the seamless steel pipe 1 in a fully extended state. According to the requirement of the size of the inner wall grinding area of the seamless steel pipe 1, select a specified number of grinding strips 23 and specify the grinding plan for the internal area of the seamless steel pipe 1 or the full circumferential grinding plan.

[0029] II. Perform grinding operations on the specified position inside the seamless steel pipe 1; Use the driving component to control the reciprocating axial movement of the disk seat 25 in the sleeve 32. Under the limiting action of the guiding groove 33 and the seeker 34, the protrusion 35 slides periodically in a single direction in the guiding groove 33, driving the periodic movement and rotation of the disk seat 25. During this process, the protrusion 35 periodically jacks up the two seekers 34 on the guiding groove 33; When the protrusion 35 slides in the straight groove, the sliding table 21, the disk seat 25 and the multiple grinding strips 23 slide together along the axis direction of the seamless steel pipe 1. When the protrusion 35 slides in the inclined groove, the disk seat 25 rotates around its own axis relative to the sliding table 21, the I-shaped pin 24 slides in the inclined groove 251, and the multiple grinding strips 23 are synchronously pushed outwards or retracted inwards; Repeat the above operations multiple times, and periodically run the grinding strip 23 to push outwards, keep the grinding strip 23 in contact with the seamless steel pipe 1 and move axially, the grinding strip 23 retracts inwards, and keep the grinding strip 23 in the retracted state and move axially in the reverse direction to perform grinding operations on the specified position inside the seamless steel pipe 1; so that the dust attached to the grinding strip 23 can smoothly detach from the grinding strip 23, avoiding secondary damage to the pipe wall caused by the inability to discharge the metal dust due to the grinding strip 23 always abutting against the inner wall of the seamless steel pipe 1.

[0030] 3. Grinding operation is performed on a large area inside the seamless steel pipe 1; During the operation of the above step 2, a guide component is used to change the axial position of the frame 11 in the seamless steel pipe 1, and a large-scale grinding operation is performed on the interior of the seamless steel pipe 1.

[0031] By using the above operation of the present application, during the periodic pushing of the two guide heads 34 on the guide groove 33 by the protrusion 35, the different contact modes between the protrusion 35 and the inclined surface 341 and the arc surface 342 on the guide head 34 are utilized to ensure that the guide head 34 is spaced from the outer side surface of the protrusion 35 when it is popped out and reset, thereby forming a situation where the guide head 34 is gradually pushed up and then suddenly popped out and reset. By utilizing the different states of the guide head 34 when it is extended and retracted and the dynamic changes of the movement state of the protrusion 35 at the corner of the guide groove 33, a strong and short vibration is generated to shake off the metal dust on the surface of the grinding strip 23, thereby realizing the surface self-cleaning function of the grinding strip 23 while maintaining the simple structure and compact size of the overall device. In the above step 2, the extension direction of the grinding strip 23 is staggered with the axial direction of the seamless steel pipe 1, and the projection in the axial direction of the seamless steel pipe 1 is Figure 15 As shown, the plurality of grinding strips 23 can contact the inner wall of the seamless steel pipe 1 in all directions, and through the continuous grinding operation of the grinding strips 23, efficient grinding operation of the inner wall of the seamless steel pipe 1 in the entire circumference is achieved.

[0032] like Figure 1 As shown, a cover 12 is fixedly installed on the outer side of the frame 11, and a plurality of flexible strips 121 are evenly distributed around the cover 12. The rod portion of the grinding strip 23 passes through the flexible strip 121, and a thick cover that is plugged into the outer side surface of the rod portion of the grinding strip 23 is integrally formed on the flexible strip 121; the cover 12 is used as a barrier to prevent debris from entering the frame 11 and causing damage to the driving components.

[0033] Embodiment 2: The features that are the same as those of the first embodiment are not repeated here. The difference between the first embodiment and the present embodiment is that in the present embodiment, the guiding component includes a wheel frame 13, and a plurality of wheel frames 13 are circumferentially distributed at both ends of the side of the frame 11. A tensioning wheel is rotatably mounted on the wheel frame 13. The tensioning wheel is drum-shaped as a whole, thick in the middle and thin at both ends. The outer side surface of the tensioning wheel abuts against the inner wall of the seamless steel pipe 1 in a line contact manner, and the frame 11 has good movement stability in the seamless steel pipe 1. Some of the tensioning wheels are driven to rotate by micro motors to drive the frame 11 to move axially inside the seamless steel pipe 1.

[0034] Embodiment three: The features of this embodiment that are the same as those of the first embodiment are not described in detail. The difference between this embodiment and the first embodiment is that: Figure 15 and Figure 16As shown in the figure, in this embodiment, the guiding component includes a coaxial bearing support 55 detachably installed on the workshop floor through a bracket and a plurality of clamping arms 54. The plurality of clamping arms 54 are circumferentially and evenly arranged on the outer side of the seamless steel pipe 1. There is a jack 112 on the frame 11 that can penetrate the frame 11. The cross bar on the coaxial bearing support 55 is inserted and slidably connected with the jack 112; at least two pulling rings 111 are detachably and fixedly installed at both ends of the frame 11 respectively. A rope is connected to the pulling ring 111, and the end of the rope extends to the outside of the end of the seamless steel pipe 1.

[0035] Connect the ropes corresponding to both sides of the frame 11 to a plurality of winches respectively. Start the winches, adjust the lengths of the ropes on both sides of the frame 11, and control the movement of the frame 11 along the axial direction of the seamless steel pipe 1; during this process, use the plurality of clamping arms 54 to clamp the seamless steel pipe 1, and use the coaxial bearing support 55 as the guide for the sliding of the frame 11, so that the coaxial state is maintained between the coaxial bearing support 55 and the outer side surface of the seamless steel pipe 1. Since the extending distances of the plurality of grinding strips 23 relative to the frame 11 are the same, during the process of grinding the inner wall of the seamless steel pipe 1, the coaxiality of both the inner and outer sides of the seamless steel pipe 1 can be repaired, optimizing the hydrodynamic performance of the fluid inside the seamless steel pipe 1 and avoiding the problems of eccentric load and stress concentration caused by unilateral force on the seamless steel pipe 1.

[0036] Compared with the operation mode of Embodiment 2, using the above solution of this embodiment can adapt to the use requirements of the seamless steel pipe 1 with a longer length dimension, and ensure the stable placement of the equipment at a specified position inside the seamless steel pipe 1.

[0037] Embodiment 4: The same features as those in Embodiment 2 will not be described in detail. The different solutions of this embodiment from Embodiment 2 are as follows: As Figure 1 and Figure 13 shown, in this 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 engaged and installed on the inner side thread of the end cover 51 by thread. An engineering rubber pad is arranged at the end of the anti-loosening fastener 53, and the engineering rubber pad can be tightly pressed and fitted with the inner side surface of the seamless steel pipe 1; a plurality of pipe heads 52 with built-in valves are communicated on the end cover 51; on one side of the frame 11 close to the end cover 51, an annular enclosure 14 is fixedly installed. The flared opening on the annular enclosure 14 extends towards the direction close to the end cover 51, and the outer edge of the annular enclosure 14 abuts against the inner wall of the seamless steel pipe 1; among them, the inner side surface of the seamless steel pipe 1, the end surface of the frame 11, the inner side surface of the annular enclosure 14 and the end surface of the end cover 51 together enclose a heat transfer oil storage cavity.

[0038] Among them, the pipe head 52 is connected to the heat-conducting oil delivery pump through a rubber pressure pipeline. The heat-conducting oil delivery pump is started to inject or discharge heat-conducting oil into the heat-conducting oil storage cavity, and the liquid pressure of the heat-conducting oil is used to push the annular shroud 14 and the frame 11 to move axially in the seamless steel pipe 1 together.

[0039] Compared with the operation mode of Embodiment 3, using the above scheme of this embodiment can, after polishing the inner wall of the seamless steel pipe 1, use the filling of the heat-conducting oil to isolate the polished area from contact with oxygen; in addition, using the heat-conducting oil as the filling medium, then performing local annealing treatment on the seamless steel pipe 1 to eliminate the problem of residual stress caused during the cold drawing or welding process and repair the mechanical properties of the seamless steel pipe 1.

[0040] In order to maintain the seal between the annular shroud 14 and the seamless steel pipe 1, as Figure 1 and Figure 13 shown, a reinforcing rib 15 is embedded and installed inside the annular shroud 14. By using the reinforcing rib 15, the annular shroud 14 made of engineering rubber is restricted from bending inward and deforming, so that the outer edge of the annular shroud 14 remains in contact with the inner wall of the seamless steel pipe 1, maintaining the internal closure of the heat-conducting oil storage cavity.

[0041] In order to deal with the relatively complex surface conditions of the inner wall of the seamless steel pipe 1 after long-term use and perform grinding and repair treatment on it, as Figure 14 shown, a plurality of annular shrouds 14 are provided. The plurality of annular shrouds 14 are connected through a connection seat 16. By the coaxial arrangement of the plurality of annular shrouds 14, the pressure oil injected into the seamless steel pipe 1 is blocked, increasing the seal of the heat-conducting oil storage cavity; Among them, a scraping edge 141 can also be fixedly installed on the outside of the annular shroud 14 located in the middle, so that the outer edge of the scraping edge 141 is in contact with the inner wall of the seamless steel pipe 1. The flared opening on the scraping edge 141 extends in the direction close to the frame 11, and is used to scrape off the debris adhered to the inner wall of the seamless steel pipe 1 in the full circumferential area, keeping the inner wall of the seamless steel pipe 1 clean.

[0042] Embodiment Five: The features of this embodiment that are the same as those of Embodiment 1 will not be elaborated. The different scheme of this embodiment from Embodiment 1 is as follows: As Figure 3 , Figure 4 , Figure 11 and Figure 12 shown, in this embodiment, the driving component includes a motor 42 and a rotating ring 43. The rotating ring 43 is rotationally and fittingly connected to the end of the cylindrical structure on 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 key-connected with a gear, and the gear is in meshing transmission connection with the rack plate 44 on the side of the rotating ring 43.

[0043] Among them, the end of the rack plate 44 is fixedly connected to the sliding table 21. Since the sliding table 21 is slidably connected to multiple cross bars on the frame 11, the rack plate 44 will not rotate about the axis of the frame 11, so as to maintain a stable meshing state between the rack plate 44 and the gear.

[0044] In this embodiment, the operation details of the driving component are as follows: Start the motor 42, control the gear to rotate about its own axis, and utilize the meshing transmission between the gear and the rack plate 44 to make the swivel ring 43 reciprocate along the axis direction of the seamless steel pipe 1, driving the sliding table 21, the disk seat 25 and multiple grinding bars 23 to slide relative to the frame 11 together. Under the limiting and guiding action of the sliding fit between multiple protrusions 35 and multiple annular grooves 351, the disk seat 25 rotates about its own axis relative to the sliding table 21, and controls multiple grinding bars 23 to synchronously extend or contract relative to the frame 11.

[0045] Using the above scheme of this embodiment, since the cross bars on the frame 11 are close to the edge of the frame 11, the space for installing the motor 42 inside the frame 11 occupies a relatively high proportion. Compared with the control method for adjusting the radial position of the grinding element in the patent document in the background art inside the seamless steel pipe 1, this application optimizes the drive control method, reduces the overall volume of the equipment, enables the equipment to penetrate into the seamless steel pipe with a smaller inner diameter size, disassemble the grinding bars 23 with different rod lengths, and adapt to the seamless steel pipes 1 with different diameter sizes for use; the motor 42 can use the integrated low-voltage servo motor of the NiMotion PMM series, adopt RS485 communication control, and has the functions of speed regulation and vibration suppression. The specific model is adjusted according to the surface roughness and pipe diameter adaptability of the seamless steel pipe 1.

[0046] As Figure 3 and Figure 4 shown, two driving components are provided, and the two driving components are oppositely installed inside the ends of the frame 11, playing a role in balancing the center of gravity, so that during the operation of the equipment, the overall center of gravity is located in the middle of the seamless steel pipe 1, avoiding damage to the inner wall structure of the seamless steel pipe 1 caused by irregular twisting of the equipment inside the seamless steel pipe 1.

[0047] Embodiment Six: The features that are the same as those in the first embodiment will not be described in detail. The differences between this embodiment and the first embodiment are as follows: In this embodiment, the driving component includes a linear electric cylinder and a rotating ring 43. The rotating ring 43 is rotationally and detachably connected to the end of the cylindrical structure on the side of the disk seat 25. The fixed end of the linear electric cylinder is detachably and fixedly connected to the driving frame 41, and the movable end of the linear electric cylinder is detachably and fixedly connected to the rotating ring 43. 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 DAHUAN ROBOT micro servo electric cylinders or the AA3100 series of micro electric cylinders of Beckhoff.

[0048] In this embodiment, the operation details of the driving component are as follows: Start the linear electric cylinder, control the rotating ring 43 to reciprocate along the axis direction of the seamless steel pipe 1, drive the slide table 21, the disk seat 25 and a plurality of grinding strips 23 to slide relative to the frame 11 together, and under the limiting and guiding action of the sliding engagement of a plurality of protrusions 35 and a plurality of annular grooves 351, the disk seat 25 rotates relative to the slide table 21 with its own axis as the axis, and control the plurality of grinding strips 23 to extend or contract synchronously relative to the frame 11.

[0049] Compared with the operation mode of the fifth embodiment, using the above solution of this embodiment can reduce the number of internal components of the equipment, thereby optimizing the overall manufacturing cost and use cost of the equipment.

[0050] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features (but not limited to) with similar functions disclosed in the present application.

[0051] Except for the technical features described in the specification, the remaining technical features are known to those skilled in the art. To highlight the innovative features of the present invention, the remaining technical features will not be described in detail here.

Claims

1. A seamless steel pipe inner hole grinding equipment, characterized in that, It includes a frame (11) capable of being inserted into a seamless steel pipe (1), a sliding table (21) and a fixed table (31) connected to the frame (11), and a guiding component for controlling the axial movement of the frame (11) along the seamless steel pipe (1); On the outer side of a guide cylinder (22) at the end of the sliding table (21), a plurality of grinding strips (23) capable of acting on the inner wall of the seamless steel pipe (1) are slidably installed. A disc seat (25) is rotatably installed in the sliding table (21). On the side end of the rod portion of the grinding strip (23), a T-shaped pin (24) is provided. The T-shaped pin (24) is in fitting and sliding connection with an inclined groove (251) on the disc seat (25). A driving component for controlling the movement of the disc seat (25) is installed on the frame (11); Inside a sleeve (32) in the middle of the fixed table (31), a guiding groove (33) is provided. On the outer side of the cylindrical structure on the side of the disc seat (25), a protrusion (35) is fixedly installed. The protrusion (35) is in fitting and sliding connection with the guiding groove (33); On the sleeve (32), a guiding head (34) for keeping the protrusion (35) sliding unidirectionally is slidably installed. The guiding head (34) is correspondingly arranged at the corner of the guiding groove (33). Between the guiding head (34) and the sleeve (32), a spring for pulling the guiding head (34) towards the axis direction of the disc seat (25) is provided. An anti-detachment edge (343) at the end of the guiding head (34) can be engaged with an annular groove (351) at the root of the protrusion (35).

2. The seamless steel pipe inner hole grinding equipment according to claim 1, characterized in that, The guiding component includes a wheel frame (13). A plurality of wheel frames (13) are circumferentially distributed at both ends of the side of the frame (11). A pressing wheel is rotatably installed on the wheel frame (13). The outer side surface of the pressing wheel is in line contact with the inner wall of the seamless steel pipe (1).

3. The seamless steel pipe inner hole grinding equipment according to claim 1, characterized in that The guiding component includes a coaxial bearing support (55) and a plurality of clamping arms (54) detachably installed on the workshop floor through a bracket. The plurality of clamping arms (54) are circumferentially and evenly arranged on the outer side of the seamless steel pipe (1). On the frame (11), an insertion hole (112) capable of penetrating the frame (11) is provided. A cross bar on the coaxial bearing support (55) is in plugging and sliding connection with the insertion hole (112); At least two pulling rings (111) are detachably and fixedly installed at both ends of the frame (11) respectively. A rope is connected to the pulling ring (111). The end of the rope extends to the outside of the end of the seamless steel pipe (1).

4. The seamless steel pipe inner hole grinding equipment according to claim 2, characterized in that, One end of the seamless steel pipe (1) is connected with an end cover (51) through a plurality of anti-loosening fasteners (53). A plurality of pipe heads (52) with built-in valves are communicated on the end cover (51); On one side of the frame (11) close to the end cover (51), an annular enclosing plate (14) is fixedly installed. The flared opening on the annular enclosing plate (14) extends towards the direction close to the end cover (51). The outer edge of the annular enclosing plate (14) is in contact with the inner wall of the seamless steel pipe (1); The inner side surface of the seamless steel pipe (1), the end surface of the frame (11), the inner side surface of the annular enclosing plate (14) and the end surface of the end cover (51) jointly enclose a heat transfer oil storage cavity.

5. The seamless steel pipe inner hole grinding equipment according to claim 1, characterized in that, A cover (12) is fixedly installed on the outer side of the frame (11). A plurality of flexible strips (121) are circumferentially and evenly arranged on the cover (12). The rod portion of the grinding strip (23) penetrates through the flexible strip (121). A thick sleeve that is integrally formed on the flexible strip (121) and is inserted into the outer side surface of the rod portion of the grinding strip (23) is provided.

6. The seamless steel pipe inner hole grinding equipment according to claim 4, characterized in that, A reinforcing rib (15) is embedded and installed inside the annular enclosing plate (14).

7. The seamless steel pipe inner hole grinding equipment according to claim 6, characterized in that, A plurality of annular enclosing plates (14) are provided, and the plurality of annular enclosing plates (14) are connected by a connecting seat (16).

8. The seamless steel pipe inner hole grinding equipment according to claim 7, characterized in that, A scraping edge (141) is fixedly installed on the outer side of the annular enclosing plate (14) located in the middle. The outer edge of the scraping edge (141) abuts against the inner wall of the seamless steel pipe (1). The flared opening on the scraping edge (141) extends in the direction close to the frame (11).

9. The seamless steel pipe inner hole grinding equipment according to claim 1, characterized in that, The driving component includes a motor (42) and a rotating ring (43). The rotating ring (43) is in an interference fit and rotational connection with the end of the cylindrical structure on the side of the disc base (25). The motor (42) is installed on the frame (11) through a driving frame (41). The output shaft of the motor (42) is key-connected with a gear. The gear is in meshing transmission connection with a rack plate (44) on the side of the rotating ring (43). The end of the rack plate (44) is fixedly connected with the sliding table (21).

10. The seamless steel pipe inner hole grinding equipment according to claim 1, characterized in that, The driving component includes a linear electric cylinder and a rotating ring (43). The rotating ring (43) is in an interference fit and rotational connection with the end of the cylindrical structure on the side of the disc base (25). The fixed end of the linear electric cylinder is detachably and fixedly connected with the driving frame (41), and the movable end of the linear electric cylinder is detachably and fixedly connected with the rotating ring (43).

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