Power assisting device for segmented grinding of steel structure

Abstract

The utility model discloses a segmented polishing power assisting device for a steel structure, and relates to the technical field of polishing power assisting devices. The upper end of the bearing plate is fixedly connected with two U-shaped blocks which are symmetrical about the center of the bearing plate, and the two sides of each U-shaped block are fixedly connected with L-shaped blocks. According to the device, a frame-shaped steel structure is placed at the upper end of a lifting plate, a fifth electric cylinder is started firstly to enable limiting clamping plates to move, the two limiting clamping plates close to each other limit the two side faces of the frame-shaped steel structure, then a traction assembly is used for moving the frame-shaped steel structure, and in the moving process, the limiting clamping plates are driven to move; the first grinding assemblies are started to grind the right-angle side of the upper end of the steel structure, due to the fact that the two first grinding assemblies are arranged, segmented grinding is achieved, the grinding efficiency of the steel structure is improved, and the problem that in the prior art, when a steel structure segmented grinding power assisting device is used, the grinding efficiency is high is solved. And a frame-shaped steel structure is inconvenient to pull and polish quickly.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding assisting devices, in particular to a steel structure segmented grinding assisting device. Background Art

[0002] With the rapid development of my country's construction industry, steel structures are widely used in large-scale steel structure projects such as high-rise buildings, large bridges, and stadiums due to their high strength, high toughness, short construction period, and high recycling rate. In the process of steel structure construction, the grinding operation of components is a key link, and its quality directly affects the safety, aesthetics and service life of the entire structure.

[0003] At present, in order to increase the grinding rate of steel structures, segmented grinding equipment is usually used to grind steel structures in segments, and grinding heads or polishing heads that can rotate at high speed are set at different positions to achieve grinding of various side ends of the steel structure. However, when the steel structure segmented grinding assist device in the prior art is used, it is not convenient to quickly pull and grind the frame-shaped steel structure, and it is difficult to quickly grind the two side walls of the frame-shaped steel structure, which needs further improvement. Utility Model Content

[0004] The purpose of the utility model is to provide a steel structure segmented grinding assisting device, which solves the technical problems that the steel structure segmented grinding assisting device in the prior art mentioned above is not convenient for quickly pulling and grinding the frame-shaped steel structure when in use, and it is difficult to quickly grind the two side walls of the frame-shaped steel structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel structure segmented grinding assist device, comprising a bearing plate; the upper end of the bearing plate is fixedly connected to two U-shaped blocks symmetrically about the center of the bearing plate, and L-shaped blocks are fixedly connected to both sides of the U-shaped blocks, and the center of the upper end of the bearing plate is fixedly connected to a bearing body, and the upper inner wall of the upper end of the bearing body is fixedly connected to a first electric cylinder, and the upper end of the output shaft of the first electric cylinder is fixedly connected to a lifting plate, and a first grinding component for grinding the edges and corners of the steel structure is provided on the bearing plate, and the first grinding component is divided into two and symmetrically distributed about the bearing body, and a traction component for pulling the steel structure is provided on the bearing plate, and a fifth electric cylinder is fixedly connected to the side end of the L-shaped block, and the output shaft of the fifth electric cylinder passes through the L-shaped block and is fixedly connected to a limiting clamp.

[0006] Preferably, when the frame-shaped steel structure needs to be polished, the frame-shaped steel structure is placed on the upper end of the lifting plate, and the fifth electric cylinder is first turned on to move the limit clamp, so that the two limit clamps close to each other limit the two side surfaces of the frame-shaped steel structure, and then the frame-shaped steel structure is moved by the traction assembly. During the movement, the first polishing assembly is turned on to polish the right-angle side of the upper end of the steel structure. Since two first polishing assemblies are provided, segmented polishing is achieved, which improves the polishing efficiency of the steel structure and solves the problem that the steel structure segmented polishing assist device in the prior art is not convenient for quick traction and polishing of the frame-shaped steel structure when in use.

[0007] Preferably, the traction assembly includes a fixed seat and a traction block; the upper end of the carrying plate is fixedly connected to the fixed seat, and the inner walls of both sides of the fixed seat are rotatably mounted with a take-up roller, one side of the fixed seat is fixedly connected to a second motor, the output shaft of the second motor passes through the fixed seat and is fixedly connected to the rotating shaft of the take-up roller, a traction rope is fixedly connected to the take-up roller, and the other end of the traction rope is fixedly connected to the traction block, the traction block is "L" shaped, the front end of the traction block is fixedly connected to a fourth electric cylinder, the rear end of the output shaft of the fourth electric cylinder passes through the traction block and is fixedly connected to the limiting block, and a handle is fixedly connected to the inclined surface of the upper end of the traction block Hand, the upper ends of the two L-shaped blocks on the same side are fixedly connected with a second limit plate, and the ends of the two second limit plates close to each other are fitted with the two side surfaces of the traction block. Hold the handle to place the traction block on the upper right-angle side of the front end of the frame-shaped steel structure, and then turn on the fourth electric cylinder to move the limit block backward for a distance. By turning on the second motor to drive the take-up roller to rotate, the traction rope will be wound on the take-up roller, which will pull the traction block and drive the frame-shaped steel structure to move backward, and the traction block will move stably along the ends of the two second limit plates close to each other.

[0008] Preferably, the two side surfaces of the lifting plate are respectively in contact with the two side surfaces of the inner wall of the U-shaped block. The lifting plate is made of stainless steel. When the lifting plate moves in the vertical direction, it moves stably along the two side surfaces of the inner wall of the U-shaped block.

[0009] Preferably, the first grinding assembly includes a second electric cylinder, a moving block, a third electric cylinder, a lifting block, a first motor, a first grinding disc and a first limit plate; the upper end of the bearing plate is fixedly connected to two second electric cylinders with opposite output directions, the output shaft of the second electric cylinder is fixedly connected to a moving block, the upper end of the moving block is fixedly connected to a third electric cylinder, the upper end of the telescopic rod of the third electric cylinder is fixedly connected to a lifting block, the first motor is fixedly connected to the lifting block, and the output shaft of the first motor is fixedly connected to the first grinding disc; turning on the second electric cylinder can adjust the position of the moving block, turning on the third electric cylinder can adjust the height of the lifting block, thereby facilitating rapid adjustment of the position and height of the first grinding disc; turning on the first motor to rotate the first grinding disc can facilitate grinding of the upper right-angle side of the frame-shaped steel structure.

[0010] Preferably, two first limit plates are fixedly connected to the upper end of the bearing plate, and the ends of the two first limit plates close to each other are in contact with the two end surfaces of the moving block. When the first limit plates move, they will move stably along the ends of the two first limit plates close to each other.

[0011] Preferably, a second grinding assembly is provided at the upper end of the carrier plate, and the second grinding assembly includes a bracket, a third motor, a double-thread screw, a threaded sleeve, a connecting block, a fourth motor, a second grinding disc and a slider; the upper end of the carrier plate is fixedly connected to two brackets symmetrical to the carrier body, a double-thread screw is rotatably installed between the two brackets, one of the brackets is fixedly connected to the third motor, the output shaft of the third motor passes through the bracket and is fixedly connected to one end of the double-thread screw, the outer wall of the double-thread screw is located on both sides of the center, the threads are opposite to each other, and the outer wall of the double-thread screw is installed with threads that are respectively opposite to the two threads An adaptive threaded sleeve, the lower end of the threaded sleeve is fixedly connected to a connecting block, the inner wall of the connecting block is fixedly connected to a fourth motor, and the output shaft of the fourth motor is fixedly connected to a second grinding disc. When it is necessary to grind the two side surfaces of the frame-shaped steel structure, the third motor is turned on to rotate the double-thread screw, and the two threaded sleeves will approach each other, which will make the two second grinding discs approach each other, and then the fourth motor is turned on to rotate the second grinding discs, and the second grinding discs can grind the side walls of the frame-shaped steel structure, solving the problem of difficulty in quickly grinding the two side walls of the frame-shaped steel structure.

[0012] Preferably, slide grooves are provided on both sides of the carrier, a slider is fixed to the lower end of the connecting block, and the slider is slidably arranged on the inner wall of the slide groove. The slider can slide along the inner wall of the slide groove, which is beneficial to the stable movement of the threaded sleeve.

[0013] Preferably, the upper end of the lifting plate is fixed with two limit long blocks symmetrically about the center of the upper end surface of the lifting plate by bolts. The limit long blocks are made of stainless steel. When the frame-shaped steel structure is pulled, the two side surfaces of the frame-shaped steel structure can be limited, and the limit long blocks can be easily replaced. The limit long blocks can be conveniently installed at a suitable position on the upper end of the lifting plate, which is more convenient to maintain.

[0014] Compared with the related art, the steel structure segmented grinding assisting device provided by the utility model has the following beneficial effects:

[0015] 1. The utility model provides a steel structure segmented grinding assisting device, which places a frame-shaped steel structure on the upper end of a lifting plate, first starts the fifth electric cylinder to move the limit clamping plate, so that two mutually close limit clamping plates limit the two sides of the frame-shaped steel structure, and then uses a traction component to move the frame-shaped steel structure. During the movement, the first grinding component is turned on to grind the right-angle side of the upper end of the steel structure. Since two first grinding components are provided, segmented grinding is realized, and the grinding efficiency of the steel structure is improved, which solves the problem that the steel structure segmented grinding assisting device in the prior art is not convenient for fast traction and grinding of the frame-shaped steel structure when in use;

[0016] 2. The position of the moving block can be adjusted by turning on the second electric cylinder, and the height of the lifting block can be adjusted by turning on the third electric cylinder, so as to facilitate the rapid adjustment of the position and height of the first grinding disc. The first motor is turned on to rotate the first grinding disc, which can facilitate the grinding of the right-angle side of the upper end of the frame-shaped steel structure. When it is necessary to grind the two sides of the frame-shaped steel structure, the third motor is turned on to rotate the double-thread screw, and the two threaded sleeves will approach each other, which will make the two second grinding discs approach each other. Then the fourth motor is turned on to rotate the second grinding disc, and the second grinding disc can grind the side wall of the frame-shaped steel structure, which solves the problem of difficulty in quickly grinding the two side walls of the frame-shaped steel structure.

[0017] 3. Place the traction block on the upper right-angle side of the front end of the frame-shaped steel structure by holding the handle, and then turn on the fourth electric cylinder to move the limit block backward for a distance. By turning on the second motor to drive the take-up roller to rotate, the traction rope will be wound on the take-up roller, which will pull the traction block and drive the frame-shaped steel structure to move backward. The traction block will move stably along the end where the two second limit plates are close to each other, which is convenient for fast and stable traction of the frame-shaped steel structure. When the frame-shaped steel structure is pulled, the limit long block can limit the two sides of the frame-shaped steel structure, and the limit long block can be easily replaced. The limit long block can be conveniently installed in a suitable position on the upper end of the lifting plate, which is more convenient to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the first grinding assembly of the utility model;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the traction assembly of the utility model;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the second grinding assembly of the utility model.

[0022] In the figure: 1, bearing plate; 2, U-shaped block; 3, L-shaped block; 4, bearing body; 5, first electric cylinder; 6, lifting plate; 7, first grinding assembly; 701, second electric cylinder; 702, moving block; 703, third electric cylinder; 704, lifting block; 705, first motor; 706, first grinding disc; 707, first limit plate; 8, traction assembly; 801, fixed seat; 802, take-up roller; 803, second motor; 804, traction Block; 805, fourth electric cylinder; 806, limit block; 807, traction rope; 808, handle; 809, second limit plate; 9, second grinding assembly; 901, bracket; 902, third motor; 903, double-thread screw; 904, threaded sleeve; 905, connecting block; 906, fourth motor; 907, second grinding disc; 908, slider; 10, slide; 11, fifth electric cylinder; 12, limit splint; 13, limit long block. DETAILED DESCRIPTION

[0023] Embodiment 1:

[0024] See also Figure 1-Figure 3 The utility model provides a technical solution, a steel structure segmented grinding assist device, including a bearing plate 1; the upper end of the bearing plate 1 is fixedly connected to two U-shaped blocks 2 symmetrically about the center of the bearing plate 1, and L-shaped blocks 3 are fixedly connected to both sides of the U-shaped block 2. A bearing body 4 is fixedly connected to the center of the upper end of the bearing plate 1, and a first electric cylinder 5 is fixedly connected to the inner wall of the upper end of the bearing body 4. A lifting plate 6 is fixedly connected to the upper end of the output shaft of the first electric cylinder 5. A first grinding component 7 for grinding the edges and corners of the steel structure is provided on the bearing plate 1. The first grinding component 7 is divided into two and is symmetrically distributed about the bearing body 4. A traction component 8 for traction of the steel structure is provided on the bearing plate 1. A fifth electric cylinder 11 is fixedly connected to the side end of the L-shaped block 3, and the output shaft of the fifth electric cylinder 11 passes through the L-shaped block 3 and is fixedly connected to a limiting clamp 12.

[0025] See also Figure 3In this embodiment, the traction assembly 8 includes a fixed seat 801 and a traction block 804; the upper end of the carrier plate 1 is fixedly connected to the fixed seat 801, and the inner walls of both sides of the fixed seat 801 are rotatably mounted with a take-up roller 802, one side of the fixed seat 801 is fixedly connected to a second motor 803, the output shaft of the second motor 803 passes through the fixed seat 801 and is fixedly connected to the rotating shaft of the take-up roller 802, a traction rope 807 is fixedly connected to the take-up roller 802, and the other end of the traction rope 807 is fixedly connected to The traction block 804 is in an "L" shape, and the front end of the traction block 804 is fixedly connected to the fourth electric cylinder 805, and the rear end of the output shaft of the fourth electric cylinder 805 passes through the traction block 804 and is fixedly connected to the limiting block 806. A handle 808 is fixedly connected to the inclined surface of the upper end of the traction block 804, and the upper ends of the two L-shaped blocks 3 on the same side are commonly fixedly connected to the second limiting plates 809, and the ends of the two second limiting plates 809 that are close to each other are in contact with the two side surfaces of the traction block 804.

[0026] See also Figure 1 In this embodiment, the two side surfaces of the lifting plate 6 are respectively in contact with the two side surfaces of the inner wall of the U-shaped block 2, and the lifting plate 6 is made of stainless steel.

[0027] See also Figure 2 In this embodiment, the first grinding assembly 7 includes a second electric cylinder 701, a moving block 702, a third electric cylinder 703, a lifting block 704, a first motor 705, a first grinding disc 706 and a first limit plate 707; the upper end of the supporting plate 1 is fixedly connected to two second electric cylinders 701 with opposite output directions, the output shaft of the second electric cylinder 701 is fixedly connected to the moving block 702, the upper end of the moving block 702 is fixedly connected to the third electric cylinder 703, the upper end of the telescopic rod of the third electric cylinder 703 is fixedly connected to the lifting block 704, the lifting block 704 is fixedly connected to the first motor 705, the output shaft of the first motor 705 is fixedly connected to the first grinding disc 706, and the upper end of the supporting plate 1 is fixedly connected to two first limit plates 707, and the ends of the two first limit plates 707 close to each other are in contact with the two end surfaces of the moving block 702.

[0028] See also Figure 1 In this embodiment, the upper end of the lifting plate 6 is fixedly connected by bolts with two symmetrical limiting long blocks 13 about the center of the upper end surface of the lifting plate 6, and the limiting long blocks 13 are made of stainless steel.

[0029] In this embodiment: the frame-shaped steel structure is placed on the upper end of the lifting plate 6, the fifth electric cylinder 11 is first turned on to move the limit clamp 12, so that the two limit clamps 12 close to each other limit the two sides of the frame-shaped steel structure, and then the traction assembly 8 is used to move the frame-shaped steel structure, and the handle 808 is held to place the traction block 804 on the upper right-angle side of the front end of the frame-shaped steel structure, and then the fourth electric cylinder 805 is turned on to move the limit block 806 backward for a distance, and the second motor 803 is turned on to drive the take-up roller 802 to rotate, and the traction rope 807 will be wound on the take-up roller 802, which will pull the traction block 804 to drive the frame-shaped steel structure to move backward, and the traction Block 804 will move stably along the end where the two second limit plates 809 are close to each other. During the movement, turning on the first grinding component 7 can grind the right-angle side of the upper end of the steel structure. Since two first grinding components 7 are provided, segmented grinding is realized, which improves the grinding efficiency of the steel structure. In addition, turning on the second electric cylinder 701 can adjust the position of the moving block 702, and turning on the third electric cylinder 703 can adjust the height of the lifting block 704, thereby facilitating the rapid adjustment of the position and height of the first grinding disc 706. Turning on the first motor 705 to rotate the first grinding disc 706 can facilitate the grinding of the right-angle side of the upper end of the frame-shaped steel structure.

[0030] Embodiment 2:

[0031] On the basis of the first embodiment, the utility model provides a technical solution: the upper end of the carrier plate 1 is provided with a second grinding assembly 9, the second grinding assembly 9 includes a bracket 901, a third motor 902, a double-thread screw 903, a threaded sleeve 904, a connecting block 905, a fourth motor 906, a second grinding disc 907 and a slider 908; the upper end of the carrier plate 1 is fixedly connected to two brackets 901 symmetrical about the carrier body 4, and a double-thread screw 903 is rotatably installed between the two brackets 901, and one of the brackets 90 1 is fixedly connected to a third motor 902, the output shaft of the third motor 902 passes through the bracket 901 and is fixedly connected to one end of a double-thread screw 903, the outer wall of the double-thread screw 903 has threads on both sides of the center that are opposite to each other, and the outer wall of the double-thread screw 903 is installed with a threaded sleeve 904 respectively matched with the two threads, the lower end of the threaded sleeve 904 is fixedly connected to a connecting block 905, the inner wall of the connecting block 905 is fixedly connected to a fourth motor 906, and the output shaft of the fourth motor 906 is fixedly connected to a second grinding disc 907.

[0032] See also Figure 1 and 4 In this embodiment, slide grooves 10 are formed through both sides of the carrier 4 , and a slider 908 is fixed to the lower end of the connecting block 905 , and the slider 908 is slidably disposed on the inner wall of the slide groove 10 .

[0033] In this embodiment: when it is necessary to grind the two side surfaces of the frame-shaped steel structure, the third motor 902 is turned on to rotate the double-thread screw 903, and the two threaded sleeves 904 are brought close to each other, which will make the two second grinding discs 907 close to each other, and then the fourth motor 906 is turned on to rotate the second grinding discs 907, and the second grinding discs 907 can grind the side walls of the frame-shaped steel structure.

[0034] Working principle: First, place the frame-shaped steel structure on the upper end of the lifting plate 6, first start the fifth electric cylinder 11 to move the limit clamping plate 12, so that the two limit clamping plates 12 close to each other limit the two sides of the frame-shaped steel structure, then start the second electric cylinder 701 to adjust the position of the moving block 702, start the third electric cylinder 703 to adjust the height of the lifting block 704, adjust the position and height of the first grinding disc 706, so that when the first motor 705 is turned on to make the first grinding disc 706 rotate, the upper right-angle side of the frame-shaped steel structure can be ground;

[0035] Then, the traction assembly 8 is used to move the frame-shaped steel structure. The traction block 804 is placed at the upper right-angled side of the front end of the frame-shaped steel structure by holding the handle 808. Then, the fourth electric cylinder 805 is turned on to make the limit block 806 move backward for a distance. By turning on the second motor 803 to drive the take-up roller 802 to rotate, the traction rope 807 will be wound on the take-up roller 802, and the traction block 804 will be pulled to drive the frame-shaped steel structure to move backward. The traction block 804 will move stably along the end where the two second limit plates 809 are close to each other. When the frame-shaped steel structure is pulled, the limit long block 13 can limit the two sides of the frame-shaped steel structure.

[0036] During the movement, the first motor 705 is turned on to rotate the first grinding disc 706, so as to grind the right-angle side of the upper end of the frame-shaped steel structure. Since two first grinding assemblies 7 are provided, segmented grinding is achieved.

[0037] When it is necessary to grind the two side surfaces of the frame-shaped steel structure, turn on the third motor 902 to rotate the double-thread screw 903, and the two threaded sleeves 904 will approach each other, so that the two second grinding discs 907 are close to each other, and then turn on the fourth motor 906 to rotate the second grinding disc 907, and the second grinding disc 907 can grind the side wall of the frame-shaped steel structure.

Claims

1. A steel structure segmented grinding assisting device, comprising a bearing plate (1); characterized in that: The upper end of the bearing plate (1) is fixedly connected to two U-shaped blocks (2) symmetrically about the center of the bearing plate (1), and L-shaped blocks (3) are fixedly connected to both sides of the U-shaped blocks (2). The center of the upper end of the bearing plate (1) is fixedly connected to a bearing body (4), and the inner wall of the upper end of the bearing body (4) is fixedly connected to a first electric cylinder (5). The upper end of the output shaft of the first electric cylinder (5) is fixedly connected to a lifting plate (6). The bearing plate (1) is provided with a first grinding assembly (7) for grinding the edges and corners of the steel structure, and the first grinding assembly (7) is divided into two and symmetrically distributed about the bearing body (4). The bearing plate (1) is provided with a traction assembly (8) for traction of the steel structure. The side end of the L-shaped block (3) is fixedly connected to a fifth electric cylinder (11), and the output shaft of the fifth electric cylinder (11) passes through the L-shaped block (3) and is fixedly connected to a limiting clamp (12).

2. The steel structure segmented grinding assisting device according to claim 1 is characterized in that: The traction assembly (8) comprises a fixed seat (801) and a traction block (804); the upper end of the carrier plate (1) is fixedly connected to the fixed seat (801); the inner walls of both sides of the fixed seat (801) are rotatably mounted with a take-up roller (802); one side of the fixed seat (801) is fixedly connected to a second motor (803); the output shaft of the second motor (803) passes through the fixed seat (801) and is fixedly connected to the rotating shaft of the take-up roller (802); a traction rope (807) is fixedly connected to the take-up roller (802); the other end of the traction rope (807) is fixedly connected to a traction The traction block (804) is in an "L" shape. The front end of the traction block (804) is fixedly connected to a fourth electric cylinder (805). The rear end of the output shaft of the fourth electric cylinder (805) passes through the traction block (804) and is fixedly connected to a limit block (806). A handle (808) is fixedly connected to the inclined surface at the upper end of the traction block (804). The upper ends of the two L-shaped blocks (3) on the same side are commonly fixedly connected to a second limit plate (809). The ends of the two second limit plates (809) that are close to each other are in contact with the two side surfaces of the traction block (804).

3. The steel structure segmented grinding assisting device according to claim 1 is characterized in that: The two side surfaces of the lifting plate (6) are respectively fitted with the two side surfaces of the inner wall of the U-shaped block (2), and the lifting plate (6) is made of stainless steel.

4. The steel structure segmented grinding assisting device according to claim 1 is characterized in that: The first grinding assembly (7) comprises a second electric cylinder (701), a moving block (702), a third electric cylinder (703), a lifting block (704), a first motor (705), a first grinding disc (706) and a first limit plate (707); the upper end of the bearing plate (1) is fixedly connected to two second electric cylinders (701) with opposite output directions, the moving block (702) is fixedly connected to the output shaft of the second electric cylinder (701), the upper end of the moving block (702) is fixedly connected to the third electric cylinder (703), the upper end of the telescopic rod of the third electric cylinder (703) is fixedly connected to the lifting block (704), the lifting block (704) is fixedly connected to the first motor (705), and the output shaft of the first motor (705) is fixedly connected to the first grinding disc (706).

5. The steel structure segmented grinding assisting device according to claim 4 is characterized in that: Two first limit plates (707) are fixedly connected to the upper end of the bearing plate (1), and the ends of the two first limit plates (707) close to each other are in contact with the two end surfaces of the moving block (702).

6. The steel structure segmented grinding assisting device according to claim 1, characterized in that: A second grinding assembly (9) is provided at the upper end of the carrier plate (1), and the second grinding assembly (9) comprises a bracket (901), a third motor (902), a double-thread screw (903), a threaded sleeve (904), a connecting block (905), a fourth motor (906), a second grinding disc (907) and a sliding block (908); the upper end of the carrier plate (1) is fixedly connected to two brackets (901) symmetrical with respect to the carrier body (4), a double-thread screw (903) is rotatably mounted between the two brackets (901), and one of the brackets (901) is fixedly connected to the third motor (902). The output shaft of the third motor (902) passes through the bracket (901) and is fixedly connected to one end of the double-thread screw (903). The outer wall of the double-thread screw (903) has threads on both sides of the center that are opposite to each other. The outer wall of the double-thread screw (903) is equipped with a threaded sleeve (904) that is respectively matched with the two threads. The lower end of the threaded sleeve (904) is fixedly connected to a connecting block (905). The inner wall of the connecting block (905) is fixedly connected to a fourth motor (906). The output shaft of the fourth motor (906) is fixedly connected to a second grinding disc (907).

7. The steel structure segmented grinding assisting device according to claim 6, characterized in that: Slide grooves (10) are provided through both sides of the carrier (4), a slider (908) is fixedly connected to the lower end of the connecting block (905), and the slider (908) is slidably arranged on the inner wall of the slide groove (10).

8. The steel structure segmented grinding assisting device according to claim 1, characterized in that: The upper end of the lifting plate (6) is fixedly connected to two position-limiting long blocks (13) symmetrical about the center of the upper end surface of the lifting plate (6) by bolts, and the position-limiting long blocks (13) are made of stainless steel.

Images