Automatic disc changing device and method for continuous production of steel pipes

Abstract

The invention discloses an automatic disc changing device and method for continuous production of steel pipes, and relates to the technical field of steel pipe preparation. A tray changing mechanism is fixedly mounted on a lifting rope at the bottom of the lifting walking trolley; a flow guide assembly is fixedly installed on the hoisting walking trolley truss. The distance between the clamping side plate and the discharging side plate is adjusted by arranging the disc changing mechanism, and the clamping side plate and the discharging side plate adopt a one-jacking and one-sliding double-point fixing mode to meet the machining requirements of steel pipes with different lengths. The influence of the temperature of the steel pipe machining pool on the driving device is reduced through cooling oil in a cold and hot oil tank in the hydraulic oil assembly, a pressure cylinder can be additionally arranged on the side, close to the balance weight structure, of the hoisting shell, and a clamping side plate and a discharging side plate are pushed to move towards one side of the discharging side plate under the cooperation of a winch assembly; and automatic control is achieved, manual intervention is reduced, the clamping stability is high, and the steel pipe transferring efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe preparation, in particular to an automatic disc changing device and method for continuous production of steel pipes. Background Art

[0002] The automatic reel changing device for continuous production of steel pipes is a key equipment in the steel pipe production process. It is mainly used to realize automatic reel changing of steel pipes on the production line to improve production efficiency and product quality.

[0003] The turntable in the existing device lacks a stable clamping ability for the workpiece, especially when the workpiece is driven to be immersed in the processing pool and is taken out of the processing pool, it is easy to cause the workpiece to slip into the processing pool, and it is also easy to cause the processing hot solution to corrode the adjusting parts, thereby reducing the continuous hot processing ability of the device for the workpiece and reducing the product yield. Most of the existing disc changing units are independent pipe making processes, and there are problems of three wastes pollution and low pipe making efficiency and production capacity. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides an automatic disc changing device and method for continuous production of steel pipes.

[0005] The present invention is implemented by constructing an automatic plate changing device and method for continuous production of steel pipes, the device comprises a hoisting trolley; a plate changing mechanism is fixedly installed on the hoisting rope at the bottom of the hoisting trolley; a flow guide component is fixedly installed on the truss of the hoisting trolley; a control cabinet is fixedly installed on the side of the truss of the hoisting trolley; The disc changing mechanism includes a lifting shell fixedly installed at the lifting rope at the bottom of the lifting trolley by bolts; a guide rail is arranged on the top left side of the lifting shell, and a roller frame is slidably arranged on the guide rail; the right side of the roller frame is fixedly installed with the end of the cylinder piston rod; a winch assembly is fixedly installed on the right side of the rear end of the lifting shell by bolts; a clamping piece is arranged at the bottom of the winch assembly; a hydraulic oil assembly is fixedly arranged at the front end of the lifting shell; wherein, the guide assembly is specifically composed of an air pump and a guide cover, and the cylinder is connected to the guide assembly by a connecting pipe; the hydraulic oil assembly is specifically composed of a cold oil tank, a hot oil tank, a liquid pump, an air pump and a valve pipeline; a counterweight structure is fixedly installed on the left end of the lifting shell by bolts, and a notch matching the guide cover of the guide assembly is arranged on the top of the lifting shell.

[0006] Preferably, the winch assembly includes a gear box fixedly installed on the right side of the rear end of the lifting shell by bolts; the driving gear on the bottom side of the gear box is fixedly connected to the transmission shaft at the front end of the winch motor; a driven gear is provided on both sides of the top side of the gear box, and the central shaft of the driven gear is plugged and fixed to the electromagnetic coupling; the electromagnetic coupling is fixedly arranged at the rear end of the winch drum.

[0007] Preferably, the clamping member includes a clamping side plate and a unloading side plate which are fixed to the bottom of two groups of winch drums on the top side of the lifting shell through lifting ropes; multi-way valves are fixedly installed on the top of the clamping side plate and the unloading side plate, and the multi-way valve is connected to the hydraulic oil assembly through a connecting pipe; photo sensors are fixedly installed on the top of the clamping side plate and the unloading side plate.

[0008] Preferably, a pneumatic turntable is fixedly arranged inside the clamping side plate body, and the pneumatic turntable is connected to the air pump in the hydraulic oil assembly through the multi-way valve on the top of the clamping side plate; the central axis of the pneumatic turntable is plugged and fixed in the hole groove on the side of the rotating plate; a mounting screw barrel is fixedly installed on the side of the rotating plate; a sealing ring is fixedly installed at the connection between the left and right screw barrel sections of the mounting screw barrel; an adjusting piece is provided at the through hole on the side of the mounting screw barrel.

[0009] Preferably, a through hole is opened on the overlapping side plate of the unloading side plate, and the first coating layer is adhesively provided on the inner wall of the through hole; a pneumatic ring is fixedly arranged in the through hole of the overlapping middle plate of the unloading side plate, and the pneumatic ring is connected to the air pump in the hydraulic oil assembly through the multi-way valve at the top of the unloading side plate; piston holes are opened at equal intervals on the inner ring wall of the pneumatic ring, and a support rod is slidably arranged inside the piston hole.

[0010] Preferably, the adjusting member includes a fixed liquid cylinder fixedly mounted on the through hole of the screw barrel on the side of the mounting screw barrel; a sliding liquid cylinder is arranged on the top of the piston inside the fixed liquid cylinder; a micro-reversing valve is fixedly mounted on the through hole on the side of the fixed liquid cylinder, and the upper and lower valve ports of the micro-reversing valve are respectively connected to the inner cavity of the sliding liquid cylinder and the inner cavity of the fixed liquid cylinder through a hard tube; a second coating layer is adhesively arranged on the top of the cylinder body of the sliding liquid cylinder; a clamping block is fixedly mounted on the end of the piston rod of the sliding liquid cylinder.

[0011] Preferably, a water tank is fixedly provided on the hoisting traveling trolley, and the water tank is connected to the liquid pump in the counterweight structure through a connecting pipe.

[0012] The method for using the automatic disc changing device for continuous production of steel pipes comprises the following steps: Step 1: The staff assembles the hoisting trolley and the plate changing mechanism and other devices on the steel pipe production line, and enters the steel pipe material area through the walking action of the hoisting trolley, and drives the clamping parts close to the steel pipe to be processed twice by the hoisting trolley and the hoisting winch assembly, and then drives the roller frame to slide and move on the bottom side of the guide rail through the guide assembly drive cylinder, so that the roller frame pulls the hoisting rope on the hoisting drum on one side of the hoisting shell and the unloading side plate to adjust the position, and adjusts the distance between the clamping side plate and the unloading side plate to meet the processing requirements of steel pipes of different lengths; Step 2: Then, the steel pipe is passed through the through hole on the unloading side plate by the mechanical arm and is close to the clamping side plate. Here, the staff determines and rotates the installation screw barrel according to the specifications of the steel pipe to adjust the angle of inclination of the installation screw barrel and the adjusting part. Then, the control terminal controls the liquid pump on the hydraulic oil assembly to press the low-temperature hydraulic oil into the micro-reversing valve from the cold oil tank, and presses the low-temperature cooling oil into the fixed liquid cylinder and the sliding liquid cylinder respectively through the micro-reversing valve. The sliding action of the sliding liquid cylinder and the piston rod inside it is used to push the clamping block close to the inner and outer walls of the steel pipe and clamp the steel pipe. The air pump in the hydraulic oil assembly enters the inside of the pneumatic ring through the multi-way valve on the top of the unloading side plate, so that the support rod inside the pneumatic ring extends and clamps the steel pipe in the through hole on the unloading side plate, so that the steel pipe is fixedly installed between the clamping side plate and the unloading side plate. The double-point fixing method of one top and one slide can clamp steel pipes of different lengths and specifications at one time. Step 3: Since the steel pipe on one side of the unloading side plate may cause the center of gravity of the clamping side plate and the unloading side plate to shift, the counterweight water is then injected into the counterweight structure through the water tank on the hoisting trolley to adjust the center of gravity; the walking action of the hoisting trolley drives the steel pipe to be immersed in the rust removal pool, processing pool, cooling pool and other working environments. Since the pneumatic ring, fixed liquid cylinder and sliding liquid cylinder are pressure equipment, the processing liquid is reduced to enter the service life of such components; when the unloading is replaced at the end, the staff controls The control terminal pumps out the water used for counterweight inside the counterweight structure, and successively controls the working status of the two sets of electromagnetic couplings on the side of the gear box, so that the winch drum on the clamping side of the clamping side plate inside the lifting shell works and drives the clamping side plate and the unloading side plate to form an inclined angle, and then stops clamping and fixing the steel pipe through the pneumatic turntable and the sliding hydraulic cylinder, so that the steel pipe slides to the side of the unloading side plate under the factor of gravity. Here, it is only necessary to drive the disc changing mechanism to move to the side of the transfer equipment through the walking action of the lifting trolley, so that the steel pipe can slide for transfer under the factor of gravity.

[0013] The present invention has the following advantages: The present invention provides an automatic disc changing device and method for continuous production of steel pipes through improvement, which has the following improvements compared with the same type of equipment: The automatic disc changing device and method for continuous production of steel pipes described in the present invention, by setting a disc changing mechanism to adjust the spacing between the clamping side plate and the unloading side plate, adopts a double-point fixing method of one top and one slide for the clamping side plate and the unloading side plate to adapt to the processing requirements of steel pipes of different lengths, and also uses the cooling oil of the hot and cold oil tanks in the hydraulic oil assembly to reduce the influence of the temperature of the steel pipe processing pool on the driving device. A roller rack and a cylinder can also be added to the side of the lifting shell close to the counterweight structure, and the clamping side plate and the unloading side plate can be pushed to move toward the unloading side plate with the cooperation of the winch assembly, so as to realize automatic control and reduce manual intervention, and the clamping stability is high and it is beneficial to improve the steel pipe transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a rear cross-sectional structural schematic diagram of the disc changing mechanism of the present invention; Figure 3 It is a rear cross-sectional structural schematic diagram of the winch assembly of the present invention; Figure 4 This is a schematic diagram of the rear-view axis structure of the clamping member of the present invention; Figure 5 It is a schematic diagram of the exploded structure of the clamping member of the present invention; Figure 6 The present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle; Figure 7 The present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 8 It is a schematic diagram of the decomposed structure of the adjusting member of the present invention.

[0015] Among them: hoisting trolley-1, plate changing mechanism-2, guide assembly-3, control cabinet-4, counterweight structure-5, hoisting shell-21, guide rail-22, roller frame-23, cylinder-24, hoisting assembly-25, clamping part-26, hydraulic oil assembly-27, gear box-251, hoisting motor-252, electromagnetic coupling-253, hoisting drum-254, clamping side plate-261, unloading side plate-262, multi-way valve Door-263, photosensor-264, pneumatic turntable-2611, rotating plate-2612, mounting screw-2613, sealing ring-2614, adjusting member-2615, first coating layer-2621, air pressure ring-2622, supporting rod-2623, fixed liquid cylinder-26151, sliding liquid cylinder-26152, micro reversing valve-26153, second coating layer-26154, clamping block-26155. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1 to Figure 8 The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention. In the following paragraphs, the present invention is described in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0017] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of the embodiments of the present invention based on its overall structure.

[0019] Embodiment 1:

[0020] See also Figure 1 to Figure 8 The steel pipe continuous production automatic disc changing device and method of the present invention comprises a lifting and traveling trolley 1; a disc changing mechanism 2 is fixedly installed on the lifting rope at the bottom of the lifting and traveling trolley 1; a guide component 3 is fixedly installed on the truss of the lifting and traveling trolley 1; a control cabinet 4 is fixedly installed on the side of the truss of the lifting and traveling trolley 1; a water tank is fixedly provided on the lifting and traveling trolley 1, and the water tank is connected to the liquid pump in the counterweight structure 5 through a connecting pipe.

[0021] The disc changing mechanism 2 includes a lifting shell 21 fixedly installed at the bottom lifting rope of the lifting walking trolley 1 by bolts; a guide rail 22 is arranged on the top left side of the lifting shell 21, and a roller frame 23 is slidably arranged on the guide rail 22; the right side of the roller frame 23 is fixedly installed with the end of the piston rod of the cylinder 24; a winch assembly 25 is fixedly installed on the right side of the rear end of the lifting shell 21 by bolts; a clamping member 26 is arranged at the bottom of the winch assembly 25; a hydraulic oil assembly 27 is fixedly arranged at the front end of the lifting shell 21; wherein, the guide assembly 3 is specifically composed of an air pump and a guide cover, and the cylinder 24 is connected to the guide assembly 3 by a connecting pipe; the hydraulic oil assembly 27 is specifically composed of a cold oil tank, a hot oil tank, a liquid pump, an air pump and a valve pipeline; a counterweight structure 5 is fixedly installed on the left end of the lifting shell 21 by bolts, and a notch matching the guide cover of the guide assembly 3 is arranged on the top of the lifting shell 21.

[0022] The hoisting assembly 25 includes a gear box 251 fixedly installed on the right side of the rear end of the lifting shell 21 by bolts; the driving gear on the bottom side of the gear box 251 is fixedly connected to the front end transmission shaft of the hoisting motor 252; a driven gear is provided on both sides of the top side of the gear box 251, and the central shaft of the driven gear is plugged and fixed with the electromagnetic coupling 253; the electromagnetic coupling 253 is fixedly arranged at the rear end of the hoisting drum 254.

[0023] The clamping member 26 includes a clamping side plate 261 and a unloading side plate 262 which are fixed to the bottom of two groups of hoisting drums 254 on the top side of the lifting shell 21 through a lifting rope; a multi-way valve 263 is fixedly installed on the top of the clamping side plate 261 and the unloading side plate 262, and the multi-way valve 263 is connected to the hydraulic oil assembly 27 through a connecting pipe; a photo sensor 264 is fixedly installed on the top of the clamping side plate 261 and the unloading side plate 262.

[0024] A through hole is provided on the overlapping side plate of the unloading side plate 262, and a first coating layer 2621 is adhered to the inner wall of the through hole; a pneumatic ring 2622 is fixedly provided in the through hole of the overlapping middle plate of the unloading side plate 262, and the pneumatic ring 2622 is connected to the air pump in the hydraulic oil assembly 27 via a multi-way valve 263 at the top of the unloading side plate 262; piston holes are equidistantly provided on the inner ring wall of the pneumatic ring 2622, and a support rod 2623 is slidably provided inside the piston hole.

[0025] Embodiment 2:

[0026] See also Figure 1 to Figure 8 Compared with the first embodiment, the automatic disc changing device and method for continuous production of steel pipes of the present invention further includes: a pneumatic turntable 2611 is fixedly arranged inside the clamping side plate 261, and the pneumatic turntable 2611 is connected to the air pump in the hydraulic oil assembly 27 through the multi-way valve 263 on the top of the clamping side plate 261; the central axis of the pneumatic turntable 2611 is plugged and fixed in the side hole groove of the rotating plate 2612; a mounting screw barrel 2613 is fixedly installed on the side of the rotating plate 2612; a sealing ring 2614 is fixedly installed at the connection between the left and right screw barrel sections of the mounting screw barrel 2613; an adjusting member 2615 is provided at the side through hole of the mounting screw barrel 2613.

[0027] The adjusting member 2615 includes a fixed liquid cylinder 26151 fixedly mounted on the side screw barrel through hole of the mounting screw barrel 2613; a sliding liquid cylinder 26152 is arranged on the top of the internal piston of the fixed liquid cylinder 26151; a micro reversing valve 26153 is fixedly mounted on the side through hole of the fixed liquid cylinder 26151, and the upper and lower valve ports of the micro reversing valve 26153 are respectively connected to the inner cavity of the sliding liquid cylinder 26152 and the inner cavity of the fixed liquid cylinder 26151 through a hard tube; a second coating layer 26154 is adhesively mounted on the top of the cylinder body of the sliding liquid cylinder 26152; a clamping block 26155 is fixedly mounted on the end of the piston rod of the sliding liquid cylinder 26152.

[0028] The working principle of the automatic disc changing device and method for continuous production of steel pipes is as follows: First, when using this device, first place the device in the working area, and then connect the device to an external power source to provide the device with the power required for operation; Second, the staff assembles the hoisting trolley 1 and the plate changing mechanism 2 and other devices on the steel pipe production line, and enters the steel pipe material area through the walking action of the hoisting trolley 1, and drives the clamping member 26 to approach the steel pipe to be processed twice by means of the hoisting trolley 1 and the hoisting assembly 25, and then drives the cylinder 24 through the guide assembly 3 to drive the roller frame 23 to slide and move on the bottom side of the guide rail 22, so that the roller frame 23 pulls the hoisting rope and the unloading side plate 262 on the hoisting cylinder 254 on one side of the hoisting shell 21 to adjust the position, and adjusts the distance between the clamping side plate 261 and the unloading side plate 262 to meet the processing requirements of steel pipes of different lengths; Third, the steel pipe is then passed through the through hole on the discharge side plate 262 by the robot arm and brought close to the clamping side plate 261. Here, the staff determines and rotates the installation screw 2613 according to the specifications of the steel pipe to adjust the angle of the installation screw 2613 and the adjustment member 2615. Then, the control terminal controls the liquid pump on the hydraulic oil assembly 27 to press the low-temperature hydraulic oil from the cold oil tank into the micro reversing valve 26153, and presses the low-temperature cooling oil into the fixed liquid cylinder 26151 and the sliding liquid cylinder 26152 respectively through the micro reversing valve 26153. 152 and the sliding action of the piston rod inside it push the clamping block 26155 close to the inner and outer walls of the steel pipe and clamp the steel pipe, and enter the inside of the air pressure ring 2622 through the multi-way valve 263 on the top of the discharge side plate 262 through the air pump in the hydraulic oil assembly 27, so that the support rod 2623 inside the air pressure ring 2622 extends out and clamps the steel pipe in the through hole on the discharge side plate 262, so that the steel pipe is fixedly installed between the clamping side plate 261 and the discharge side plate 262. The double-point fixing method of one top and one slide can clamp steel pipes of different lengths and specifications at one time; Fourth, since the steel pipe on one side of the discharge side plate 262 extends out, the center of gravity of the clamping side plate 261 and the discharge side plate 262 may be offset, and then the counterweight water is injected into the counterweight structure 5 through the water tank on the hoisting walking trolley 1 to adjust the center of gravity; and then the steel pipe is driven by the walking action of the hoisting walking trolley 1 to successively pass through the immersion processing of the rust removal pool, processing pool and cooling pool and other working environments. Since the air pressure ring 2622, the fixed liquid cylinder 26151 and the sliding liquid cylinder 26152 and other components are pressure equipment, the processing liquid is reduced from entering and affecting the service life of such components; Fifth, when the unloading is finally replaced, the staff will pump out the water used for the counterweight inside the counterweight structure 5 through the control terminal, and successively control the working states of the two sets of electromagnetic couplings 253 on the side of the gear box 251, so that the hoisting drum 254 on the side of the clamping side plate 261 inside the hoisting shell 21 works and drives the clamping side plate 261 and the unloading side plate 262 to form an inclined angle, and then the pneumatic turntable 2611 and the sliding cylinder 26152 stop clamping and fixing the steel pipe, so that the steel pipe slides to the side of the unloading side plate 262 under the factor of gravity. Here, it is only necessary to drive the plate changing mechanism 2 to move to the side of the transfer equipment through the walking action of the hoisting trolley 1, so that the steel pipe slides under the factor of gravity for transfer; Sixth, the staff can also add a roller frame 23 and a cylinder 24 on the side of the lifting shell 21 close to the counterweight structure 5, and with the cooperation of the winch assembly 25, push the clamping side plate 261 and the unloading side plate 262 to move toward the unloading side plate 262. By bringing the two adjacent groups of lifting walking trolleys 1 and disc changing mechanisms 2 close to each other, the steel pipe is displaced into the adjacent disc changing mechanisms 2, thereby realizing automatic control and reducing manual intervention. The clamping stability is high and it is beneficial to improve the steel pipe transportation efficiency.

[0029] The present invention provides an automatic disc changing device and method for continuous production of steel pipes through improvements. A disc changing mechanism 2 is set to adjust the distance between the clamping side plate 261 and the unloading side plate 262. The clamping side plate 261 and the unloading side plate 262 are fixed at two points, one pushing and one sliding, to meet the processing requirements of steel pipes of different lengths. The cooling oil in the hot and cold oil tanks in the hydraulic oil assembly 27 is used to reduce the influence of the temperature of the steel pipe processing pool on the driving device. A roller frame 23 and a cylinder 24 can also be added to the side of the lifting shell 21 close to the counterweight structure 5, and the clamping side plate 261 and the unloading side plate 262 are pushed to move toward the unloading side plate 262 with the cooperation of the winch assembly 25, thereby realizing automatic control and reducing manual intervention. The clamping stability is high and it is beneficial to improve the steel pipe transportation efficiency.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic plate changing device for continuous production of steel pipes, comprising a lifting and traveling trolley (1); a plate changing mechanism (2) is fixedly installed on the lifting rope at the bottom of the lifting and traveling trolley (1); a flow guide component (3) is fixedly installed on the truss of the lifting and traveling trolley (1); and a control cabinet (4) is fixedly installed on the side of the truss of the lifting and traveling trolley (1); Features: The plate changing mechanism (2) comprises a lifting shell (21) fixedly mounted on the bottom rope of the lifting trolley (1) by bolts; a guide rail (22) is arranged on the left side of the top of the lifting shell (21), and a roller frame (23) is slidably arranged on the guide rail (22); the right side of the roller frame (23) is fixedly mounted to the end of the piston rod of the cylinder (24); a winch assembly (25) is fixedly mounted on the right side of the rear end of the lifting shell (21) by bolts; a clamping member (25) is arranged at the bottom of the winch assembly (25). 6); a hydraulic oil assembly (27) is fixedly arranged at the front end of the hoisting housing (21); wherein the flow guide assembly (3) is specifically composed of an air pump and a flow guide cover, and the cylinder (24) is connected to the flow guide assembly (3) through a connecting pipe; the hydraulic oil assembly (27) is specifically composed of a cold oil tank, a hot oil tank, a liquid pump, an air pump and a valve pipeline; a counterweight structure (5) is fixedly installed at the left end of the hoisting housing (21) by bolts, and a notch matching the flow guide cover of the flow guide assembly (3) is arranged on the top of the hoisting housing (21).

2. The automatic reel changing device for continuous production of steel pipes according to claim 1 is characterized by: The hoisting assembly (25) comprises a gear box (251) fixedly mounted on the right side of the rear end of the hoisting housing (21) by bolts; a driving gear on the inner bottom side of the gear box (251) is fixedly connected to a transmission shaft at the front end of a hoisting motor (252); a driven gear is provided on both the left and right sides of the inner top side of the gear box (251), and the central shaft of the driven gear is plugged and fixed to an electromagnetic coupling (253); the electromagnetic coupling (253) is fixedly arranged at the rear end of the hoisting drum (254).

3. The automatic plate changing device for continuous production of steel pipes according to claim 2 is characterized by: The clamping member (26) comprises a clamping side plate (261) and a discharge side plate (262) which are fixed to the bottom of two groups of hoisting drums (254) on the top side of the lifting housing (21) via a lifting rope; a multi-way valve (263) is fixedly installed on the top of each of the clamping side plate (261) and the discharge side plate (262), and the multi-way valve (263) is connected to the hydraulic oil assembly (27) via a connecting pipe; and a photo sensor (264) is fixedly installed on the top of each of the clamping side plate (261) and the discharge side plate (262).

4. The automatic plate changing device for continuous production of steel pipes according to claim 3 is characterized by: A pneumatic turntable (2611) is fixedly arranged inside the clamping side plate (261), and the pneumatic turntable (2611) is connected to the air pump in the hydraulic oil assembly (27) via a multi-way valve (263) at the top of the clamping side plate (261); the central axis of the pneumatic turntable (2611) is plugged and fixed in a hole groove on the side of the rotating plate (2612); a mounting screw barrel (2613) is fixedly installed on the side of the rotating plate (2612); a sealing ring (2614) is fixedly installed at the connection between the left and right screw barrel sections of the mounting screw barrel (2613); and an adjusting member (2615) is provided at the through hole on the side of the mounting screw barrel (2613).

5. The automatic reel changing device for continuous production of steel pipes according to claim 4 is characterized by: The stacked side plate of the unloading side plate (262) is provided with a through hole, and the inner wall of the through hole is adhesively provided with a first coating layer (2621); a pneumatic ring (2622) is fixedly provided in the through hole of the stacked middle plate of the unloading side plate (262), and the pneumatic ring (2622) is connected to the air pump in the hydraulic oil assembly (27) via a multi-way valve (263) at the top of the unloading side plate (262); piston holes are equidistantly provided on the inner ring wall of the pneumatic ring (2622), and a support rod (2623) is slidably provided inside the piston hole.

6. The automatic plate changing device for continuous production of steel pipes according to claim 5 is characterized by: The regulating member (2615) comprises a fixed liquid cylinder (26151) fixedly mounted on a through hole of a side screw cylinder of the mounting screw cylinder (2613); a sliding liquid cylinder (26152) is arranged on the top of the internal piston of the fixed liquid cylinder (26151); a micro reversing valve (26153) is fixedly mounted on the through hole of the side screw cylinder (26151), and the upper and lower valve ports of the micro reversing valve (26153) are respectively connected to the inner cavity of the sliding liquid cylinder (26152) and the inner cavity of the fixed liquid cylinder (26151) through a hard tube; a second coating layer (26154) is adhesively mounted on the top of the cylinder body of the sliding liquid cylinder (26152); and a clamping block (26155) is fixedly mounted on the end of the piston rod of the sliding liquid cylinder (26152).

7. The automatic plate changing device for continuous production of steel pipes according to claim 6 is characterized by: A water tank is fixedly arranged on the hoisting trolley (1), and the water tank is connected to a liquid pump in the counterweight structure (5) via a connecting pipe.

8. A method for using the automatic disc changing device for continuous production of steel pipes, which is used to implement the automatic disc changing device for continuous production of steel pipes as claimed in claim 7, characterized in that: The following steps are involved: Step 1: The staff assembles the hoisting trolley (1) and the plate changing mechanism (2) and other devices on the steel pipe production line, and enters the steel pipe material area through the walking action of the hoisting trolley (1), and drives the clamping member (26) to approach the steel pipe to be processed twice by means of the hoisting trolley (1) and the hoisting assembly (25), and then drives the cylinder (24) through the guide assembly (3) to drive the roller frame (23) to slide and move on the bottom side of the guide rail (22), so that the roller frame (23) pulls the hoisting rope and the unloading side plate (262) on the hoisting drum (254) on one side of the hoisting shell (21) to adjust the position, and adjusts the distance between the clamping side plate (261) and the unloading side plate (262) to meet the processing requirements of steel pipes of different lengths; Step 2: Then, the steel pipe is passed through the through hole on the unloading side plate (262) by the robot arm and is close to the clamping side plate (261). Here, the staff determines and rotates the installation screw barrel (2613) according to the specifications of the steel pipe to adjust the angle of inclination of the installation screw barrel (2613) and the adjustment member (2615). Then, the control terminal controls the liquid pump on the hydraulic oil assembly (27) to press the low-temperature hydraulic oil into the micro reversing valve (26153) through the cold oil tank, and the low-temperature cooling oil is respectively pressed into the fixed liquid cylinder (26151) and the sliding liquid cylinder (26152) through the sliding liquid cylinder (26 152) and the sliding action of the piston rod inside it to push the clamping block (26155) close to the inner and outer walls of the steel pipe and clamp the steel pipe, and enter the inside of the air pressure ring (2622) through the air pump in the hydraulic oil assembly (27) through the multi-way valve (263) on the top of the discharge side plate (262), so that the support rod (2623) inside the air pressure ring (2622) extends and clamps the steel pipe in the through hole on the discharge side plate (262), so that the steel pipe is fixedly installed between the clamping side plate (261) and the discharge side plate (262). The double-point fixing method of one top and one slide can clamp steel pipes of different lengths and specifications at one time; Step 3: Since the steel pipe on one side of the unloading side plate (262) may extend, the center of gravity of the clamping side plate (261) and the unloading side plate (262) may be offset. Then, the counterweight water is injected into the counterweight structure (5) through the water tank on the hoisting walking trolley (1) to adjust the center of gravity. Then, the walking action of the hoisting walking trolley (1) drives the steel pipe to be immersed in the working environment such as the rust removal pool, the processing pool and the cooling pool. Since the air pressure ring (2622), the fixed liquid cylinder (26151) and the sliding liquid cylinder (26152) are pressure equipment, the processing liquid is reduced to affect the service life of such components. When the unloading is replaced at the end, the staff controls the counterweight structure through the control terminal. (5) The water used for internal counterweight is pumped out, and the working states of the two sets of electromagnetic couplings (253) on the side of the gear box (251) are controlled in sequence, so that the winch drum (254) on the side of the clamping side plate (261) inside the lifting shell (21) is operated to drive the clamping side plate (261) and the discharge side plate (262) to form an inclined angle, and then the pneumatic turntable (2611) and the sliding cylinder (26152) are used to stop clamping and fixing the steel pipe, so that the steel pipe slides toward the side of the discharge side plate (262) under the factor of gravity. Here, it is only necessary to drive the plate changing mechanism (2) to move to the side of the transfer equipment through the walking action of the lifting trolley (1), so that the steel pipe slides under the factor of gravity for transfer.

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