Steel pipe inner hole grinding device

Abstract

The utility model discloses a steel pipe inner hole polishing device. A polishing assembly comprises a rotating shaft extending vertically, a polishing head arranged on the rotating shaft and flexible polishing strips distributed on the peripheral face of the polishing head. The first surrounding plate is fixed on the base; the second surrounding plate is movably arranged on the base up and down and is provided with a polishing position which is combined with the first surrounding plate to form a protective space surrounding the outer side of the polishing assembly; a hollow positioning structure for bearing and positioning the steel pipe is arranged on the second surrounding plate corresponding to the protection space; a cover plate is arranged at the top of the second surrounding plate; and at the grinding position, the cover plate covers the top of the protection space, and the rotating shaft is inserted into the hollow positioning structure in a penetrating manner. The steel pipe inner hole polishing device can automatically polish an inner hole of a steel pipe in a lifting mode, in the polishing process, the steel pipe is separated from the outside, the polishing process is safe and reliable, dust can be effectively shielded, and the steel pipe polishing device meets the polishing requirement of the steel pipe with the short length and is high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a steel pipe inner hole grinding device. Background Art

[0002] After the steel pipe is formed, the inner hole of the steel pipe needs to be polished to improve the flatness and roughness of the inner surface of the steel pipe, providing a basis for subsequent processes such as painting. Conventionally, the steel pipe is placed on a support frame on the machine tool, and the polishing tool is made into a slender structure so that it can be inserted into the steel pipe. During the polishing process, the operator holds the steel pipe and pushes it forward to complete the polishing operation. The above-mentioned polishing operation process can meet the polishing operation requirements of steel pipes of a certain length. For shorter steel pipes, the operator does not have enough hand space on the steel pipe. In the process of pushing the steel pipe to move, parts of the human body are very likely to contact the moving polishing device, posing a safety hazard. In addition, during the operation, the large amount of dust generated during the polishing process cannot be effectively blocked, which not only affects the working environment and causes pollution, but also harms the health of the operators. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the utility model is to propose a steel pipe inner hole grinding device, which can automatically grind the inner hole of the steel pipe by lifting and lowering, and during the grinding process, the steel pipe and the outside world are isolated from each other. The grinding process is safe and reliable, and can effectively block dust. It is suitable for the grinding needs of shorter steel pipes and has strong practicality.

[0004] The technical solution of the utility model is achieved as follows: a steel pipe inner hole grinding device, including a base, a grinding assembly, a first enclosure plate, and a second enclosure plate;

[0005] The grinding assembly includes a rotating shaft disposed on the base and extending vertically, a grinding head disposed on the rotating shaft, flexible grinding strips distributed on the outer circumference of the grinding head, and a first driver for driving the rotating shaft to rotate around its own central axis;

[0006] The first enclosure and the second enclosure are arranged on opposite sides of the grinding assembly; the first enclosure is fixed on the base; the second enclosure is movably arranged on the base and has a grinding position that is combined with the first enclosure to form a protective space enclosed outside the grinding assembly;

[0007] A hollow positioning structure for carrying and positioning the steel pipe in a vertical posture is provided on the second enclosure corresponding to the protective space; the hollow positioning structure is coaxially arranged with the rotation axis;

[0008] A cover plate is provided on the top of the second enclosure; at the grinding position, the cover plate covers the top of the protective space, and the rotating shaft is inserted into the interior of the hollow positioning structure.

[0009] Furthermore, a connecting port is provided on the base corresponding to the protective space; the steel pipe inner hole grinding device includes an exhaust device connected to the connecting port; and ventilation holes are provided on the cover plate.

[0010] Furthermore, the hollow positioning structure includes an annular positioning piece formed on the second enclosure plate and an annular step structure formed on the inner circumference of the annular positioning piece; the inner diameter of the annular positioning piece is adapted to the outer diameter of the steel pipe; the inner circumference of the annular step structure is larger than the inner diameter of the steel pipe.

[0011] Furthermore, the steel pipe inner hole grinding device includes an up and down driving mechanism for driving the second enclosure plate to move up and down.

[0012] Furthermore, the up and down driving mechanism includes a second driver, a lower pressure plate, and a coil spring; the second driver is fixed on the base and has a telescopic rod; the telescopic rod is movably inserted into the cover plate up and down; the lower pressure plate is arranged below the cover plate and is connected to the telescopic rod; upper and lower limit spaces are formed between the lower pressure plate and the hollow positioning structure; the coil spring is arranged above the cover plate and is sleeved on the telescopic rod; a limit block is provided on the telescopic rod above the cover plate; the first end of the coil spring abuts against the cover plate, and the second end abuts against the limit block.

[0013] Furthermore, an observation window is provided on the first enclosure; and the observation window is covered with a transparent plate.

[0014] Furthermore, the first enclosure plate and the second enclosure plate are both semicircular plates; at the grinding position, the first enclosure plate and the second enclosure plate form a circular protective space.

[0015] Furthermore, the flexible grinding strip is an abrasive belt or a steel wire.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] 1. In the utility model, through the coordinated use of the first enclosure and the second enclosure, the steel pipe can be placed on the hollow positioning structure and positioned. By lowering the second enclosure to the grinding position, the steel pipe can be transported to the protective space formed between the first enclosure and the second enclosure, and the inner hole is ground in the protective space by the grinding assembly. At the same time, in the grinding position, the protective space is covered by the cover plate to form a closed space. Through the above method, automatic grinding of the steel pipe can be achieved, and the steel pipe can be isolated from the outside world during the grinding process. The grinding process is safe and reliable, and can effectively block dust. It is suitable for the grinding needs of shorter steel pipes and has strong practicality.

[0018] 2. The utility model is used in conjunction with an exhaust device. When the second enclosure is located at the grinding position, the exhaust device can discharge the dust in the protective space in a centralized manner, so as to centrally collect the dust and effectively prevent the dust from flying. The utility model is highly practical.

[0019] 3. The utility model forms upper and lower limit spaces between the lower pressure plate and the hollow positioning structure through the coordinated use of the upper and lower driving mechanisms. When the second driver drives the second enclosure plate to be located at the grinding position, the lower pressure plate can continue to move downward and abut against the top of the steel pipe located on the hollow positioning structure, thereby being able to limit the steel pipe up and down, effectively preventing the steel pipe from shaking during the grinding process, and effectively improving the stability of the steel pipe grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the main view structure;

[0023] Figure 3 for Figure 1 Schematic diagram of the cross-sectional view

[0024] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the second enclosure at the grinding position

[0025] Figure 5 for Figure 4 A cross-sectional structural diagram of ;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the second enclosure of the utility model;

[0027] Figure 7 It is a three-dimensional structural schematic diagram of the upper and lower driving mechanism of the utility model;

[0028] Among them: 1. base; 11. connecting port; 2. rotating shaft; 21. grinding head; 22. flexible grinding strip; 23. first driver; 3. first enclosure; 31. transparent plate; 4. second enclosure; 41. annular positioning member; 42. annular step structure; 43. cover plate; 431. ventilation hole; 5. lower pressure plate; 6. second driver; 61. telescopic rod; 62. limit block; 7. spiral spring; 8. exhaust duct; 9. steel pipe. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0030] like Figure 1-7 The figure shows a steel pipe inner hole grinding device described in this embodiment, which is used for grinding the inner hole of a cylindrical steel pipe 9. The steel pipe inner hole grinding device includes a base 1, a grinding assembly, a first enclosure 3, and a second enclosure 4. Among them, the grinding assembly includes a rotating shaft 2, a grinding head 21, a flexible grinding strip 22, and a first driver 23. The rotating shaft 2 extends vertically and is mounted on the base 1 through a bearing so that it can rotate. The grinding head 21 is coaxially fixed on the rotating shaft 2 by a screw. The flexible grinding strip 22 is distributed on the outer peripheral surface of the grinding head 21, and its first end is fixed to the outer peripheral surface of the grinding head 21, and the second end extends in a direction away from the grinding head 21. It should be noted that the above-mentioned grinding head 21 and the flexible grinding strip 22 are conventional components in the prior art, and the grinding operation can be performed through the flexible grinding strip 22. The flexible grinding strip 22 of this embodiment is an abrasive belt or a steel wire. The first driver 23 is fixedly mounted on the base 1 and is in transmission connection with the rotating shaft 2 to drive the rotating shaft 2 to rotate around its own central axis. The first driver 23 is a motor in the prior art. In this embodiment, the outer diameter of the integral structure formed by the grinding head 21 and the grinding strip is slightly larger than the inner diameter of the steel pipe 9.

[0031] The aforementioned first enclosure 3 and second enclosure 4 are arranged on opposite sides of the grinding assembly. In this embodiment, the first enclosure 3 is arranged on the front side of the grinding assembly, and the second enclosure 4 is arranged on the rear side of the grinding assembly. The first enclosure 3 is fixed on the base 1. The second enclosure 4 is movably mounted on the base 1 by a vertical rod. The second enclosure 4 moves downward to have a grinding position in which it is combined with the first enclosure 3 to form a protective space enclosed outside the grinding assembly. The above-mentioned first enclosure 3 and second enclosure 4 are both semicircular plates. When the second enclosure 4 is in the grinding position, the first enclosure 3 and the second enclosure 4 form a circular protective space. Through the above-mentioned structural design, the grinding assembly is enclosed in the protective space.

[0032] A hollow positioning structure is processed on the corresponding protective space of the second enclosure 4. The steel pipe 9 can be supported and positioned on the hollow positioning structure in a vertical posture to limit the movement of the steel pipe 9 in the horizontal direction. When the second enclosure 4 moves up and down, the steel pipe 9 can synchronously follow the up and down movement. The hollow positioning structure is coaxially arranged with the rotating shaft 2. Specifically, the hollow positioning structure includes an annular positioning member 41 formed on the second enclosure 4 and an annular step structure 42 formed on the inner circumference of the annular positioning member 41. The above-mentioned annular positioning member 41 and the annular step structure 42 are both coaxially arranged with the rotating shaft 2. The inner diameter of the annular positioning member 41 is adapted to the outer diameter of the steel pipe 9. The inner circumference of the annular step structure 42 is larger than the inner diameter of the steel pipe 9. Through the above-mentioned structural design, the bottom of the steel pipe 9 can be inserted into the inside of the annular positioning member 41 and restricted from moving by the annular positioning member 41, and the bottom surface of the steel pipe 9 abuts against the step surface of the annular step structure 42 to be supported by the annular step structure 42.

[0033] In this embodiment, a cover plate 43 is installed on the top of the second enclosure 4. The cover plate 43 can move up and down following the second enclosure 4. In the aforementioned grinding position, the cover plate 43 covers the top of the aforementioned protective space, and the bottom of the protective space is closed by the base 1, so that the protective space forms a closed cavity structure. And in the aforementioned grinding position, the rotating shaft 2 is inserted into the interior of the aforementioned annular positioning member 41 and the annular step structure 42. When the steel pipe 9 is placed on the hollow positioning structure, in the above-mentioned grinding position, the rotating shaft 2 and the flexible grinding strip 22 can be inserted into the interior of the steel pipe 9, and by driving the rotating shaft 2 to rotate, the flexible grinding strip 22 can contact the inner hole wall of the steel pipe 9 for grinding.

[0034] The steel pipe inner hole grinding device of this embodiment includes an up and down driving mechanism. The up and down driving mechanism is used to drive the second enclosure 4 to move up and down. Specifically, the up and down driving mechanism includes a second driver 6, a lower pressure plate 5, and a coil spring 7. The second driver 6 is fixed on the base 1 and has a telescopic rod 61 that can move up and down. The second driver 6 is preferably an electric push rod or a hydraulic cylinder in the prior art. The telescopic rod 61 is inserted into the cover plate 43 in an up and down manner. The aforementioned lower pressure plate 5 is arranged below the cover plate 43 and is connected to the telescopic rod 61. The lower pressure plate 5 is a circular ring structure and is coaxially arranged with the rotating shaft 2. The inner diameter of the lower pressure plate 5 is smaller than the outer diameter of the steel pipe 9 and slightly larger than the inner diameter of the steel pipe 9. The lower pressure plate 5 corresponds to the hollow positioning structure up and down, and an upper and lower limit space is formed between the lower pressure plate 5 and the hollow positioning structure. The steel pipe 9 is placed in the upper and lower limit space. The coil spring 7 is installed above the cover plate 43 and is sleeved on the telescopic rod 61. A limit block 62 is installed on the telescopic rod 61 above the cover plate 43. The first end of the aforementioned coil spring 7 abuts against the cover plate 43, and the second end abuts against the limit block 62. Through the above-mentioned structural design, when the telescopic rod 61 drives the lower pressure plate 5 to move downward, under the elastic force of the coil spring 7, the cover plate 43 and the second enclosure plate 4 follow and move downward. In addition, in the aforementioned grinding position, when the cover plate 43 seals the protective space, the spring can be compressed so that the telescopic rod 61 can further drive the lower pressure plate 5 to move downward. When the telescopic rod 61 drives the lower pressure plate 5 to move upward, the lower pressure plate 5 drives the second enclosure plate 4 to move upward as a whole, so that it can abut against the top of the steel pipe 9 located on the hollow positioning structure, thereby limiting the upper and lower positions of the steel pipe 9.

[0035] In this embodiment, a connecting port 11 is processed on the aforementioned base 1 corresponding to the protection space. When the second enclosure 4 is in the grinding position, the connecting port 11 is connected to the protection space. An exhaust pipe 8 is connected to the connecting port 11. A plurality of ventilation holes 431 are processed on the cover plate 43. When the second enclosure 4 is in the grinding position, the ventilation holes 431 are connected to the protection space. The exhaust device is connected to the connecting port 11 through the exhaust pipe 8 so as to be able to exhaust the airflow of the protection space. During the operation of the exhaust device, the external airflow enters the protection space through the ventilation holes 431.

[0036] In this embodiment, an observation window is processed on the first enclosure plate 3. The observation window is covered with a transparent plate 31. Through the transparent plate 31 and the observation window, the internal grinding process of the protection space can be observed.

[0037] When in use, the second driver 6 drives the second enclosure 4 to move upward to the top of the first enclosure 3, and inserts the steel pipe 9 into the annular positioning member 41 to be carried and positioned. The second driver 6 drives the second enclosure 4 to move downward to the grinding position to transport the steel pipe 9 to the protective space. The second driver 6 drives the lower pressing plate 5 to continue to move downward so that the lower pressing plate 5 abuts against the top of the steel pipe 9 located on the hollow positioning structure, so that the steel pipe 9 can be limited up and down to effectively prevent the steel pipe 9 from shaking during the grinding process. The first driver 23 drives the rotating shaft 2 to rotate so that the inner hole of the steel pipe 9 is polished by the flexible polishing strip 22. After the grinding is completed, the second enclosure 4 is driven to move upward to move the steel pipe 9 out of the protective space. In the above manner, the automatic grinding of the steel pipe 9 can be realized, and the steel pipe 9 can be isolated from the outside world during the grinding process. The grinding process is safe and reliable, and dust can be effectively shielded. It is suitable for the grinding needs of steel pipes 9 with shorter lengths and has strong practicality. During the above-mentioned grinding process, the exhaust device is started to discharge the dust in the protection space through the exhaust pipe 8, so as to collect the dust in a centralized manner, effectively prevent the dust from flying, and has strong practicality.

[0038] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A steel pipe inner hole grinding device, comprising a base, a grinding assembly, a first enclosure plate, and a second enclosure plate; characterized in that: The grinding assembly includes a rotating shaft disposed on the base and extending vertically, a grinding head disposed on the rotating shaft, flexible grinding strips distributed on the outer circumference of the grinding head, and a first driver for driving the rotating shaft to rotate around its own central axis; The first enclosure and the second enclosure are arranged on opposite sides of the grinding assembly; the first enclosure is fixed on the base; the second enclosure is movably arranged on the base and has a grinding position that is combined with the first enclosure to form a protective space enclosed outside the grinding assembly; A hollow positioning structure for carrying and positioning the steel pipe in a vertical posture is provided on the second enclosure corresponding to the protective space; the hollow positioning structure is coaxially arranged with the rotation axis; A cover plate is provided on the top of the second enclosure; at the grinding position, the cover plate covers the top of the protective space, and the rotating shaft is inserted into the interior of the hollow positioning structure.

2. The steel pipe inner hole grinding device according to claim 1, characterized in that: A connecting port is provided on the base corresponding to the protective space; the steel pipe inner hole grinding device includes an exhaust device connected to the connecting port; and a ventilation hole is provided on the cover plate.

3. The steel pipe inner hole grinding device according to claim 1, characterized in that: The hollow positioning structure includes an annular positioning piece formed on the second enclosure plate and an annular step structure formed on the inner circumference of the annular positioning piece; the inner diameter of the annular positioning piece is adapted to the outer diameter of the steel pipe; the inner circumference of the annular step structure is larger than the inner diameter of the steel pipe.

4. The steel pipe inner hole grinding device according to claim 1, characterized in that: The steel pipe inner hole grinding device includes an up-and-down driving mechanism for driving the second enclosure plate to move up and down.

5. The steel pipe inner hole grinding device according to claim 4, characterized in that: The up and down driving mechanism includes a second driver, a lower pressure plate, and a coil spring; the second driver is fixed on the base and has a telescopic rod; the telescopic rod is movably inserted into the cover plate up and down; the lower pressure plate is arranged below the cover plate and is connected to the telescopic rod; upper and lower limit spaces are formed between the lower pressure plate and the hollow positioning structure; the coil spring is arranged above the cover plate and is sleeved on the telescopic rod; a limit block is provided on the telescopic rod above the cover plate; the first end of the coil spring abuts against the cover plate, and the second end abuts against the limit block.

6. The steel pipe inner hole grinding device according to claim 1, characterized in that: The first enclosure is provided with an observation window; the observation window is covered with a transparent plate.

7. The steel pipe inner hole grinding device according to claim 1, characterized in that: The first enclosure plate and the second enclosure plate are both semicircular plates; at the grinding position, the first enclosure plate and the second enclosure plate form a circular protective space.

8. The steel pipe inner hole grinding device according to claim 1, characterized in that: The flexible grinding strip is an abrasive belt or a steel wire.

Images