Internal polishing machine for stainless steel pipe

Abstract

The internal polishing machine comprises a driving mechanism, a polishing mechanism and a powdered scrap recycling mechanism, one output end of the driving mechanism is connected with the polishing mechanism, the powdered scrap recycling mechanism is connected with the other end of the driving mechanism, and a plurality of auxiliary damping supporting mechanisms which are annularly distributed are arranged on the circumferential portion of the driving mechanism; and a plurality of polishing mechanisms can be spliced in sequence. The stainless steel pipe polishing device has the beneficial effects that vibration generated during operation of the driving mechanism can be effectively reduced through the arrangement of the auxiliary damping supporting mechanism, the stability and polishing precision of the device are improved, the multiple polishing mechanisms can be spliced in sequence, the polishing requirements of stainless steel pipes with different lengths can be met, and meanwhile through the structural design of the polishing frame, the polishing efficiency is improved. According to the stainless steel pipe polishing device, the polishing block can be adjusted in a self-adaptive mode according to the inner diameter of a stainless steel pipe, the universality of the device is improved, powder scraps generated in the polishing process can be recycled in time through the powder scrap recycling mechanism, the powder scrap recycling efficiency is improved through double filtration of the screen and the filter bag, environmental pollution is reduced, and the health of operators is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stainless steel pipe polishing, and particularly to an inner polishing machine for stainless steel pipes. BACKGROUND

[0002] In industrial production, stainless steel pipes are widely used in various fields due to their excellent performance. The inner surface polishing of stainless steel pipes is an important link in the processing process, and the polishing quality directly affects the service performance and service life of the stainless steel pipes. The traditional inner polishing machine for stainless steel pipes has some problems in use, for example, the driving mechanism is prone to vibration during operation, affecting the polishing precision and the stability of the equipment; the structural design of the polishing mechanism is not reasonable enough to adapt to the polishing needs of stainless steel pipes of different specifications, and the powder dust generated during the polishing process cannot be effectively recycled, which not only pollutes the environment but also may harm the health of the operators.

[0003] Therefore, it is necessary to provide an inner polishing machine for stainless steel pipes aiming at the above technical solutions. SUMMARY

[0004] In order to make up for the deficiencies of the prior art, the present application provides a hardness detection equipment for PVC pipes, which solves the above technical problems through a modular polishing mechanism, a multi-stage damping design and an integrated powder dust recycling system.

[0005] The technical solution adopted by the present application to solve the technical problems is as follows:

[0006] An inner polishing machine for stainless steel pipes, comprising a driving mechanism, a polishing mechanism and a powder dust recycling mechanism, wherein an output end of the driving mechanism is connected with the polishing mechanism, and the powder dust recycling mechanism is connected with the other end of the driving mechanism, and a plurality of auxiliary damping support mechanisms are arranged in a ring shape on the circumference of the driving mechanism, and the polishing mechanism can be connected in sequence.

[0007] The polishing mechanism comprises a first rotating shaft, a polishing frame and a limiting ring, wherein a plurality of polishing frames are hinged to one end of the first rotating shaft, and the limiting ring is sleeved on the first rotating shaft; and a spring and a movable ring are sequentially sleeved between the polishing frame and the limiting ring.

[0008] The polishing frame comprises a first connecting rod, a second connecting rod and a polishing block, wherein one end of the first rotating shaft is connected with a splicing block, one end of the first connecting rod is hinged to the circumference of the splicing block, the other end of the first connecting rod is fixed to the polishing block, one end of the second connecting rod is hinged to the middle position of the first connecting rod, and the other end of the second connecting rod is hinged to a sliding ring, and the sliding ring is sleeved on the first rotating shaft.

[0009] A reinforcing rod is arranged at the connection between the polishing block and the first connecting rod, and the polishing block is connected with a polishing layer through an internal hexagonal bolt.

[0010] The splicing block is provided with a splicing slot, the other end of the first connecting shaft is provided with a splicing bolt matched with the splicing slot of the other first connecting shaft, the inner wall of the splicing slot is provided with an elastic bead, the splicing bolt is provided with a groove matched with the elastic bead, the inner bottom of the splicing slot is provided with a strong magnet, and the splicing bolt is made of iron material.

[0011] The driving mechanism comprises a cylinder and a servo motor, the servo motor is arranged in the cylinder, one output end of the servo motor is connected with the first rotating shaft, and the other output end of the servo motor is connected with the paddle through the second rotating shaft.

[0012] The powder recovery mechanism comprises a recovery cylinder, a shroud and a screen, the recovery cylinder is connected with one side of the shroud, the other side of the shroud is fixed to the cylinder through a plurality of supports, and the screen is arranged at the opening of the recovery cylinder.

[0013] The recovery cylinder is sleeved with a filter bag, a plurality of air holes are arranged on the circumferential part of the recovery cylinder, an opening cover is arranged on the bottom of the recovery cylinder, and a carrying handle is arranged on the circumferential part of the recovery cylinder.

[0014] The auxiliary damping support mechanism comprises a fixed table, an extension frame, a universal ball and a first damping spring, the universal ball is fixed on the fixed table through the extension frame, and the first damping spring is sleeved outside the extension rod.

[0015] One end of the extension rod is inserted into the fixed cylinder, and a second damping spring is arranged between the extension rod and the inner bottom of the fixed cylinder.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The auxiliary damping support mechanism can effectively reduce the vibration generated during the operation of the driving mechanism, improve the stability of the equipment and the polishing precision.

[0018] 2. The polishing mechanism can be spliced in sequence, can adapt to the polishing requirements of stainless steel pipes of different lengths, and through the structural design of the polishing frame, the polishing block can be self-adaptively adjusted according to the inner diameter of the stainless steel pipe, and the universality of the equipment is improved.

[0019] 3. The powder recovery mechanism can recover the powder generated during the polishing process in time, through the double filtration of the screen and the filter bag, the powder recovery efficiency is improved, the environmental pollution is reduced, and the health of the operator is protected. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0021] Figures 1 to 4 Structure diagram of the present application;

[0022] Figure 5 Structure diagram of the present application; Figure 6 Connection structure diagram of the driving mechanism, the polishing machine and the powder recovery mechanism of the present application;

[0023] Figure 7 Structure diagram of the polishing mechanism of the present application;

[0024] Figure 8 Structure diagram of the polishing mechanism of the present application; Figure 9 Structure diagram of the powder recovery mechanism of the present application;

[0025] Figure 10 Structure diagram of the auxiliary support mechanism of the present application;

[0026] Figure 11 Structure diagram of the telescopic support of the present application;

[0027] Figure 12 Assembling diagram of two driving mechanisms of the present application;

[0028] Figure 13 Assembling diagram of two driving mechanisms of the present application; Figure 14 Assembling diagram of two driving mechanisms of the present application;

[0029] The figure reference: 1, driving mechanism; 2, polishing mechanism; 3, dust recovery mechanism; 4, auxiliary support mechanism; 101, cylinder; 102, servo motor; 103, first rotating shaft; 104, second rotating shaft; 105, paddle; 106, bracket; 201, limiting ring; 202, spring; 203, movable ring; 204, polishing frame; 205, first connecting rod; 206, second connecting rod; 207, polishing block; 208, reinforcing rod; 209, slip ring; 210, splicing block; 211, splicing groove; 212, splicing bolt; 213, elastic bead; 214, strong magnet; 215, inner hexagonal bolt; 216, polishing layer; 217, groove; 301, recovery cylinder; 302, shield; 303, screen; 304, filter bag; 305, air hole; 306, opening cover; 307, handle; 308, hook; 401, fixed table; 402, telescopic support; 403, telescopic rod; 404, fixed cylinder; 405, universal ball; 406, first damping spring; 407, second damping spring; 5, stainless steel pipe; 6, mounting bracket; 7, driving cylinder mechanism. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "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 device or element referred to 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" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it 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 through specific circumstances.

[0033] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the claims.

[0034] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application can be implemented in various different ways as defined and covered by the claims. Figures 1-14 The present application is further described in detail,

[0035] The embodiments of the present application discloses a kind of stainless steel pipe's inner polishing machine, including drive mechanism 1, polishing mechanism 2 and dust recovery mechanism 3, the output end of the drive mechanism 1 is connected with polishing mechanism 2, the dust recovery mechanism 3 is connected with the other end of drive mechanism 1, the circumferential part of the drive mechanism 1 is provided with several auxiliary shock-absorbing support mechanisms 4 distributed in ring, the polishing mechanism 2 can be sequentially spliced several.

[0036] Drive mechanism 1, polishing mechanism 2 and dust recovery mechanism 3 are combined, drive mechanism 1 provides power for polishing mechanism 2, while reducing operating vibration through auxiliary shock-absorbing support mechanism 4, guaranteeing polishing accuracy;Dust recovery mechanism 3 collects the dust generated by polishing in time, reduces environmental pollution;And the design of polishing mechanism 2 can be spliced, can adapt to the polishing demand of different length stainless steel pipe, greatly improves the practicability and universality of equipment.

[0037] Polishing mechanism 2 includes first shaft 103, polishing frame 204 and limit ring 201, the end of the first shaft 103 is hinged with several polishing frames 204, the limit ring 201 is sleeved on the first shaft 103;The first shaft 103 is sequentially sleeved with spring 202 and movable ring 203 between polishing frame 204 and limit ring 201.

[0038] The above technical scheme has beneficial effects: the polishing frame 204 can be self-adapted to adjust according to the inner diameter of the stainless steel pipe during work. Spring 202 and movable ring 203 play a buffering role, not only can ensure that polishing block 207 is closely attached to the inner wall of stainless steel pipe, guarantee polishing effect, but also can avoid rigid collision between polishing frame 204 and pipe wall due to the slight difference of inner diameter of stainless steel pipe, improve the applicability and service life of equipment.

[0039] Polishing frame 204 includes first connecting rod 205, second connecting rod 206 and polishing block 207, one end of the first shaft 103 is connected with splicing block 210, one end of the first connecting rod 205 is hinged with the circumferential part of splicing block 210, the other end of the first connecting rod 205 is fixed to the polishing block 207, one end of the second connecting rod 206 is hinged to the middle position of the first connecting rod 205, the other end of the second connecting rod 206 is hinged to the slip ring 209, and the slip ring 209 is sleeved on the first shaft 103.

[0040] The beneficial effects of the above technical scheme are: the polishing frame 204 adopts the articulated structure of the first connecting rod 205, the second connecting rod 206 and the polishing block 207, and cooperates with the sliding ring 209 to slide on the first rotating shaft 103, when the first rotating shaft 103 rotates, the second connecting rod 206 can drive the first connecting rod 205 to swing, so that the polishing block 207 contacts the inner wall of the stainless steel pipe at a suitable angle and pressure, and high-efficiency polishing is realized. This structure design makes the movement track of the polishing block 207 more reasonable, which can effectively improve the polishing efficiency and quality, and reduce the wear of the polishing block 207.

[0041] The polishing block 207 is provided with a reinforcing rod 208 at the connection position with the first connecting rod 205, and the polishing block 207 is connected with a polishing layer 216 through an internal hexagonal bolt 215.

[0042] The beneficial effects of the above technical scheme are: the reinforcing rod 208 enhances the connection strength between the two, avoids breakage and other situations caused by large stress during polishing, and improves the overall stability of the polishing frame 204; the polishing block 207 is connected with the polishing layer 216 through the internal hexagonal bolt 215, which facilitates the replacement of the polishing layer 216, and when the polishing layer 216 is worn, it can be quickly and conveniently replaced, reducing the maintenance cost of the equipment, while ensuring the persistence of the polishing effect.

[0043] The splicing block 210 is provided with a splicing groove 211, the other end of the first connecting shaft 103 is provided with a splicing pin 212 matched with the splicing groove 211 of the other first connecting shaft 103, the inner wall of the splicing groove 211 is provided with an elastic bead 213, the splicing pin 212 is provided with a groove matched with the elastic bead 213, the inner bottom of the splicing groove 211 is provided with a strong magnet 214, and the splicing pin 212 is made of iron material.

[0044] The beneficial effects of the above technical scheme are: the matching design of the splicing groove 211 of the splicing block 210 and the splicing pin 212 makes the multiple polishing mechanisms 2 convenient and fast to splice, so as to adapt to stainless steel pipes of different lengths. The cooperation of the elastic bead 213 and the groove and the setting of the strong magnet 214 can ensure that the connected polishing mechanism 2 after splicing is tightly and stably connected, prevent loosening phenomenon during polishing, and ensure the reliability and stability of the equipment operation.

[0045] The driving mechanism 1 comprises a cylinder 101 and a servo motor 102, the servo motor 102 is arranged in the cylinder 101, one output end of the servo motor 102 is connected with the first rotating shaft 103, and the other output end of the servo motor 102 is connected with the paddle 105 through the second rotating shaft 104.

[0046] The beneficial effects of the above technical scheme are: the driving mechanism 1 adopts the combination of the cylinder 101 and the servo motor 102, the servo motor 102 is installed in the cylinder 101, the structure is compact, and stable power output can be provided for the equipment. One output end of the servo motor 102 is connected with the first rotating shaft 103 to drive the polishing mechanism 2, and the other output end is connected with the paddle 105, the air flow generated by the rotation of the paddle 105 can be used to drive the dust recovery mechanism 3, the rational distribution and efficient utilization of power are realized, the overall structure of the equipment is simplified, and the operation efficiency of the equipment is improved.

[0047] The dust recovery mechanism 3 comprises a recovery cylinder 301, a shroud 302 and a screen 303, the recovery cylinder 301 is connected with one side of the shroud 302, the other side of the shroud 302 is fixed to the cylinder 101 through a plurality of supports 106, and the screen 303 is arranged at the opening of the recovery cylinder 301.

[0048] The beneficial effects of the above technical scheme are: in the dust recovery mechanism 3, the cooperation of the recovery cylinder 301, the shroud 302 and the screen 303 can effectively collect the dust generated in the polishing process. The screen 303 is arranged at the opening of the recovery cylinder 301, which can preliminarily filter the relatively large particles of dust to prevent them from entering the inside of the recovery cylinder 301 and causing blockage; the shroud 302 is fixed on the cylinder 101 through the supports 106, which ensures the stable connection of the dust recovery mechanism 3 and the driving mechanism 1, and at the same time provides a good channel for the collection of dust and improves the efficiency of dust recovery.

[0049] The recovery cylinder 301 is sleeved with a filter bag 304, a plurality of air holes 305 are arranged on the circumferential part of the recovery cylinder 301, an opening cover 306 is arranged at the bottom of the recovery cylinder 301, and a carrying handle 307 is arranged on the circumferential part of the recovery cylinder 301. Hooks 308 for hanging the filter bag 304 are arranged on the inner wall of the recovery cylinder 301.

[0050] The beneficial effects of the above technical scheme are: the recovery cylinder 301 is sleeved with the filter bag 304, which can further finely filter the dust entering the recovery cylinder 301, ensure the cleanliness of the discharged gas, and reduce environmental pollution; the air holes 305 on the circumferential part of the recovery cylinder 301 are beneficial to air circulation, which ensures that the dust can be smoothly sucked into the recovery cylinder 301; the opening cover 306 at the bottom facilitates the cleaning of the collected dust in the recovery cylinder 301, and the operation is simple and convenient; the setting of the carrying handle 307 facilitates the movement and carrying of the recovery cylinder 301, and improves the convenience of equipment use.

[0051] The auxiliary damping support mechanism 4 comprises a fixed table 401, a telescopic frame 402, a universal ball 405 and a first damping spring 406, the universal ball 405 is fixed on the fixed table 401 through the telescopic frame 402, and the first damping spring 406 is sleeved outside the telescopic rod 403.

[0052] The beneficial effects of the above technical scheme are: in the auxiliary shock-absorbing support mechanism 4, the combination of the fixed table 401, the telescopic frame 402, the universal ball 405 and the first shock-absorbing spring 406 can effectively absorb the vibration generated when the driving mechanism 1 operates. The universal ball 405 can freely adjust the position of the equipment in the horizontal direction, facilitating the installation and positioning of the equipment; the telescopic frame 402 cooperates with the first shock-absorbing spring 406 to buffer the equipment in the vertical direction, reducing the influence of vibration on the equipment and the polishing precision, and improving the stability and reliability of the equipment operation.

[0053] One end of the telescopic rod 403 is inserted into the fixed cylinder 404, and the telescopic rod 403 and the inner bottom of the fixed cylinder 404 are provided with the second shock-absorbing spring 407.

[0054] The beneficial effects of the above technical scheme are: the telescopic rod 403 adopts the structure of the fixed cylinder 404 and the telescopic rod 403, and the second shock-absorbing spring 407 is arranged inside, which further enhances the shock-absorbing effect of the auxiliary shock-absorbing support mechanism 4. During the operation of the equipment, the second shock-absorbing spring 407 can buffer the telescopic movement of the telescopic rod 403, absorb more vibration energy, effectively reduce the vibration amplitude of the equipment, and provide a more stable working environment for the equipment, thereby improving the polishing quality and the service life of the equipment.

[0055] The beneficial effects of the present application are:

[0056] 1. The setting of the auxiliary shock-absorbing support mechanism 4 can effectively reduce the vibration generated when the driving mechanism 1 operates, improve the stability of the equipment and the polishing precision.

[0057] 2. The polishing mechanism 2 can be sequentially spliced several times, which can adapt to the polishing needs of stainless steel pipes of different lengths, and through the structural design of the polishing frame 204, the polishing block 207 can be self-adaptively adjusted according to the inner diameter of the stainless steel pipe, improving the versatility of the equipment.

[0058] 3. The powder recycling mechanism 3 can timely recycle the powder generated in the polishing process, and through the double filtration of the screen 303 and the filter bag 304, the recycling efficiency of the powder is improved, the environmental pollution is reduced, and the health of the operators is protected.

[0059] Working principle:

[0060] In use, according to the length of the stainless steel pipe splice the right number of polishing mechanism 2, the device is placed on the workbench, through the auxiliary damping support mechanism 4 universal ball 405 adjustment device position, fixed table 401 and damping spring 406, 407 play a damping effect. Start servo motor 102, drive the first shaft 103 and paddle 105 rotation, polishing mechanism 2 on the inner wall of the stainless steel pipe polishing, dust in the airflow generated by the paddle 105 into the dust recycling mechanism 3, after the screen 303 and filter bag 304 filter collected in the recycling cylinder 301. Polishing process, spring 202 and movable ring 203 make polishing block 207 can adapt to different inner diameter of the stainless steel pipe, ensure the polishing effect.

[0061] Example one:

[0062] Device assembly: for a length of 3 meters, 80mm inner diameter of the stainless steel pipe polishing needs, the stainless steel pipe is fixed on the mounting bracket, select 3 polishing mechanism 2 for splicing. The splicing pin 212 on the splicing block 210 of each polishing mechanism 2 is inserted into the splicing slot 211 of the splicing block 210 of another polishing mechanism 2, the elastic bead 213 is clamped into the recess of the splicing pin 212, the strong magnet 214 adsorbs the ferrous splicing pin 212, to ensure the splicing is stable, the assembled polishing mechanism 2 is inserted into the stainless steel pipe, and the output end of the drive cylinder mechanism is fixedly connected with the handle 307 of the recycling cylinder.

[0063] Polishing process: start servo motor 102, servo motor 102 drive the first shaft 103 rotation, and then drive the spliced polishing mechanism 2 to operate. In the process of rotation, the first connecting rod 205, the second connecting rod 206 and the slip ring 209 of the polishing frame 204 cooperate with each other, so that the polishing block 207 is closely attached to the inner wall of the stainless steel pipe at a suitable angle and pressure. The spring 202 and the movable ring 203 are self-adapted according to the inner diameter of the stainless steel pipe 80mm, to ensure that the polishing block 207 is in close contact with the pipe wall. The other output end of the servo motor 102 drives the paddle 105 to rotate through the second shaft 104, and the airflow generated by the paddle 105 blows the dust generated by the polishing to the dust recycling mechanism 3. The dust is first filtered by the screen 303 at the opening of the recycling cylinder 301, and the larger particles are intercepted. The fine dust and dust are blown into the recycling cylinder 301 by the airflow, and are further filtered and collected by the filter bag 304 inside the recycling cylinder 301. The drive cylinder mechanism drives the polishing mechanism to make reciprocating motion along the stainless steel pipe, and repeatedly polishes the inner wall of the stainless steel pipe, thereby improving the polishing effect.

[0064] Complete work: after a period of polishing work, close the servo motor 102, open the opening cover 306 at the bottom of the recycling cylinder 301, take out the filter bag 304 to clean the collected dust, and complete the inner polishing work of the 3 meters long, 80mm inner diameter stainless steel pipe.

[0065] Example two

[0066] Device assembly: for a length of 5 meters, 120mm inner diameter of stainless steel pipe, select 5 polishing mechanism 2 for splicing assembly. Repeat the splicing operation, ensure the connection between each polishing mechanism 2 is tight. Connect the assembled polishing mechanism 2 with the driving mechanism 1, install the dust recovery mechanism 3 and the auxiliary damping support mechanism 4, adjust the universal ball 405 of the auxiliary damping support mechanism 4, so that the device is stably placed on the workbench, and the first damping spring 406 and the second damping spring 407 are used to absorb the vibration of the device during operation.

[0067] Polishing process: start the servo motor 102, the first rotating shaft 103 drives the polishing mechanism 2 to rotate, because the inner diameter of the stainless steel pipe is 120mm, the spring 202 and the movable ring 203 push the polishing frame 204 to expand adaptively, the polishing block 207 is linked with the first connecting rod 205, the second connecting rod 206 and the sliding ring 209 to polish the inner wall of the stainless steel pipe in the appropriate posture. At the same time, the paddle 105 rotates to generate airflow, and the dust generated by polishing is preliminarily filtered through the screen 303 and then sent into the recovery cylinder 301, and the filter bag 304 completes fine filtering.

[0068] Complete the work: when the polishing reaches the predetermined effect, stop the operation of the servo motor 102. Move the recovery cylinder 301 by the handle 307, open the opening cover 306, clean the dust collected in the recovery cylinder 301, and complete the inner polishing task of the 5-meter-long, 120mm-inner-diameter stainless steel pipe.

[0069] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. An internal polishing machine for stainless steel pipes, characterized by: The invention comprises a driving mechanism (1), a polishing mechanism (2) and a dust recovery mechanism (3); an output end of the driving mechanism (1) is connected to the polishing mechanism (2); the dust recovery mechanism (3) is connected to the other end of the driving mechanism (1); a plurality of annularly distributed auxiliary shock-absorbing support mechanisms (4) are provided on the circumference of the driving mechanism (1); and a plurality of the polishing mechanisms (2) can be sequentially spliced.

2. The internal polishing machine for stainless steel pipe according to claim 1, characterized in that: The polishing mechanism (2) comprises a first rotating shaft (103), a polishing frame (204) and a limiting ring (201); one end of the first rotating shaft (103) is hingedly connected to a plurality of polishing frames (204); the limiting ring (201) is sleeved on the first rotating shaft (103); and the first rotating shaft (103) is sleeved with a spring (202) and a movable ring (203) in sequence between the polishing frame (204) and the limiting ring (201).

3. The internal polishing machine for stainless steel pipe according to claim 2, characterized in that: The polishing frame (204) comprises a first connecting rod (205), a second connecting rod (206) and a polishing block (207); one end of the first rotating shaft (103) is connected to the splicing block (210); one end of the first connecting rod (205) is hinged to the circumference of the splicing block (210); the other end of the first connecting rod (205) is fixed to the polishing block (207); one end of the second connecting rod (206) is hinged to the middle position of the first connecting rod (205); the other end of the second connecting rod (206) is hinged to a slip ring (209); and the slip ring (209) is sleeved on the first rotating shaft (103).

4. The internal polishing machine for stainless steel pipe according to claim 3, characterized in that: A reinforcing rod (208) is provided at the connection between the polishing block (207) and the first connecting rod (205), and the polishing block (207) is connected to the polishing layer (216) via a hexagon socket bolt (215).

5. The internal polishing machine for stainless steel pipe according to claim 4, characterized in that: The splicing block (210) is provided with a splicing groove (211), the other end of the first connecting shaft (103) is provided with a splicing pin (212) that is matched with the splicing groove (211) of the other first connecting shaft (103), the inner wall of the splicing groove (211) is provided with an elastic bead (213), the splicing pin (212) is provided with a groove that matches the elastic bead (213), the inner bottom of the splicing groove (211) is provided with a strong magnet (214), and the splicing pin (212) is made of iron material.

6. The internal polishing machine for stainless steel pipe according to claim 5, characterized in that: The driving mechanism (1) comprises a cylinder (101) and a servo motor (102), wherein the servo motor (102) is arranged in the cylinder (101), one output end of the servo motor (102) is connected to a first rotating shaft (103), and the other output end of the servo motor (102) is connected to a blade (105) via a second rotating shaft (104).

7. The internal polishing machine for stainless steel pipe according to claim 6, characterized in that: The dust recovery mechanism (3) comprises a recovery cylinder (301), a protective cover (302) and a screen (303); the recovery cylinder (301) is connected to one side of the protective cover (302); the other side of the protective cover (302) is fixed to the cylinder (101) via a plurality of brackets (106); and the screen (303) is arranged at the opening of the recovery cylinder (301).

8. The internal polishing machine for stainless steel pipe according to claim 7, characterized in that: The recovery cylinder (301) is provided with a filter bag (304) therein, a plurality of air holes (305) are provided on the circumference of the recovery cylinder (301), an opening cover (306) is provided on the bottom of the recovery cylinder (301), and a carrying handle (307) is provided on the circumference of the recovery cylinder (301).

9. The internal polishing machine for stainless steel pipe according to claim 8, characterized in that: The auxiliary shock-absorbing support mechanism (4) comprises a fixed platform (401), a telescopic frame (402), a universal ball (405) and a first shock-absorbing spring (406); the universal ball (405) is fixed to the fixed platform (401) via the telescopic frame (402); and the first shock-absorbing spring (406) is sleeved outside the telescopic rod (403).

10. The internal polishing machine for stainless steel pipe according to claim 9, characterized in that: The telescopic rod (403) comprises a fixed tube (404) and the telescopic rod (403). One end of the telescopic rod (403) is inserted into the fixed tube (404). A second shock-absorbing spring (407) is provided between the telescopic rod (403) and the bottom of the fixed tube (404).

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