Steel pipe rubber coating and blanking assembly

Abstract

The utility model discloses a steel pipe rubber coating and blanking assembly which comprises a plastic extruding machine provided with an annular plastic extruding head, and the annular plastic extruding head is provided with a conveying channel through which a steel pipe can pass; the feeding conveying device is arranged on the upstream of the plastic extruding machine, and the feeding conveying device is provided with a first conveying path in butt joint with the conveying channel; the discharging conveying device is arranged on the downstream of the plastic extruding machine, the discharging conveying device is provided with a second conveying path in butt joint with the conveying channel, and the conveying speed of the discharging conveying device is adjustable; the glue removing device is arranged between the plastic extruding machine and the discharging conveying device, and the glue removing device is provided with a glue removing module and a sensor used for sensing the sleeve head; and the tumbling frame is in butt joint with the downstream of the discharging conveying device, the tumbling frame is provided with a tumbling channel which is obliquely arranged from top to bottom, and the two sides of the lower end of the tumbling channel of the tumbling frame are provided with a magnetic attraction device and a channel notch correspondingly. The two steel pipes do not need to be separated manually, so that the labor intensity of workers is reduced, and a technical basis is provided for automatic production.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe production, and in particular to the steel pipe coating and blanking assembly. Background Technology

[0002] Steel pipes have a wide range of applications in various fields. In the construction industry, steel pipes are commonly used in structural components such as supports, beams, and columns, capable of withstanding significant loads. In the chemical industry, steel pipes, due to their corrosion resistance, high temperature resistance, and pressure resistance, are frequently used to transport various chemical media such as acids and alkalis. In the transportation industry, steel pipes are used in the construction of highway guardrails, bridges, and tunnels, offering high strength and good safety features.

[0003] Although steel pipes can be made of stainless steel, which has a certain degree of corrosion resistance, rubber-coated steel pipes are required for some special working environments, such as high-acid and high-alkali environments. Rubber-coated steel pipes not only effectively broaden the application scenarios of steel pipes, but also allow the surface of the steel pipes to be colored, thereby enhancing their aesthetics.

[0004] During production, the steel pipe is coated with a layer of plastic after passing through the extrusion head of the extruder. Since the extrusion head continuously discharges material, it is necessary to splice two adjacent steel pipes together to form a continuous workpiece. Otherwise, the molten plastic extruded by the extrusion head will accumulate at the end of the steel pipe, forming a redundant structure and affecting the normal coating of the next steel pipe.

[0005] Currently, the steel pipe coating process requires significant worker involvement. After the upstream steel pipe is fed in, workers need to use a sleeve to fit the end of the pipe and connect it to the next pipe to form a continuous workpiece. Because existing technology requires workers to manually install the sleeve each time it is loaded and manually remove it each time it is unloaded, at least two workers are needed on a production line, and the workers' labor intensity is high. Utility Model Content

[0006] The present invention aims to provide a steel pipe coating and cutting assembly that can reduce labor intensity.

[0007] According to a first aspect of the present invention, a steel pipe coating and blanking assembly comprises:

[0008] An extruder is provided with an annular extrusion head, which has a conveying channel through which a steel pipe can pass, and the annular extrusion head extrudes plastic toward the steel pipe that passes through the conveying channel.

[0009] A feeding conveyor is located upstream of the extruder, and the feeding conveyor has a first conveying path that is connected to the conveying channel;

[0010] A feeding conveyor is located downstream of the extruder, the feeding conveyor has a second conveying path connected to the conveying channel, and the conveying speed of the feeding conveyor is adjustable;

[0011] A glue removal device is installed between the extruder and the feeding conveyor. The glue removal device is equipped with a glue removal module and a sensor for sensing the sleeve head. When the sensor senses the sleeve head, the glue removal module removes the plastic covering the sleeve head.

[0012] A drop frame is connected downstream of the feeding conveyor. The drop frame has a drop channel that is inclined from top to bottom. The drop frame has a magnetic attraction device and a channel notch on both sides of the lower end of the drop channel. The channel notch is closer to the feeding conveyor than the magnetic attraction device.

[0013] The steel pipe coating and unloading assembly according to this utility model embodiment has at least the following beneficial effects: During production, the assembly composed of several steel pipes and several sleeves moves towards the annular extrusion head under the conveying of the feeding conveyor. After passing through the annular extrusion head of the extruder, the assembly is coated with a layer of plastic and then conveyed to the unloading conveyor by the feeding conveyor. At this time, the feeding conveyor and the unloading conveyor are jointly responsible for conveying the assembly. When the sleeve of the assembly moves to the position of the sensor, once the sensor detects the sleeve, the plastic removal device removes the plastic coating outside the sleeve to meet the separation conditions of the steel pipe and the sleeve. After this, since the conveying speed of the unloading conveyor is adjustable, the conveying speed of the unloading conveyor is set to be greater than that of the feeding conveyor. The device's conveying speed is adjusted to achieve separation of the downstream steel pipe and the sleeve. After the downstream steel pipe and the sleeve have separated for a certain distance, the conveying speed of the unloading conveyor is set to be equal to that of the loading conveyor. Subsequently, the downstream steel pipe enters the rolling frame under the conveying of the unloading conveyor. When the downstream steel pipe is completely separated from the unloading conveyor, it will roll down the rolling channel. Once the downstream steel pipe rolls to the lower end of the rolling channel, the sleeve connected to the downstream steel pipe will be attracted by a magnetic attraction device. Finally, the steel pipe is pulled out of the rolling channel through the channel opening by manual dragging or robotic dragging, thereby achieving separation of the sleeve and the steel pipe. Compared with the prior art, this utility model eliminates the need for manual separation of the two steel pipes, reducing the labor intensity of workers and providing a technical basis for automated production.

[0014] According to some embodiments of this utility model, the sleeve includes a base and a boss. The boss penetrates the base and extends to both sides of the base. The outer diameter of the base is larger than the inner diameter of the steel pipe, and the outer diameter of the boss is not larger than the inner diameter of the steel pipe. The two ends of the boss are respectively used to insert into the interior of two steel pipes, and the base is used to separate the two steel pipes for subsequent separation.

[0015] According to some embodiments of this utility model, specifically, the sleeve is a magnetic component and the sensor is a Hall sensor.

[0016] According to some embodiments of this utility model, the adhesive removal module includes a radial motion mechanism and a hot air unit. The radial motion mechanism has at least two movable blocks that move radially along the steel pipe. Each movable block is connected to the hot air unit, and the air outlet of the hot air unit faces the axis of the steel pipe. When the sensor detects the sleeve, the radial motion mechanism drives all movable blocks to approach the sleeve, and the hot air unit blows hot air towards the sleeve to melt the plastic wrapped around the sleeve, thereby satisfying the separation conditions between the steel pipe and the sleeve.

[0017] According to some embodiments of this utility model, the adhesive removal module further includes an axial motion mechanism that moves along an axis parallel to the steel pipe, and a radial motion mechanism connected to the axial motion mechanism. When the sensor detects the sleeve, the axial motion mechanism drives the radial motion mechanism to move synchronously with the steel pipe, providing sufficient time to melt the plastic wrapped around the sleeve. After the axial motion mechanism moves synchronously to a designated position, it drives the radial motion mechanism to reset in the opposite direction. At the same time, the movable block of the radial motion mechanism also resets, ready for the next adhesive removal process.

[0018] According to some embodiments of this utility model, a blocking mechanism is provided at the upper end of the rolling channel. The blocking mechanism has a liftable baffle, which divides the rolling channel into a stationary area and a rolling area. The stationary area is connected to the feeding conveyor. A trigger is provided in the stationary area at a position away from the feeding conveyor, and the trigger is electrically connected to the blocking mechanism. The blocking mechanism can limit the movement of the steel pipe and prevent it from tilting due to the rolling channel before it has completely detached from the feeding conveyor.

[0019] According to some embodiments of the present invention, a steel pipe and a sleeve are connected to each other to form an assembly. The width of the rolling channel is consistent with the length of the assembly, so that when the assembly rolls to the lower end of the rolling channel, the sleeve of the assembly can be attracted by the magnetic attraction device.

[0020] According to some embodiments of this utility model, the steel pipe coating assembly further includes a cooling water tank, which is disposed between the extruder and the adhesive removal device. The steel pipe coated with plastic is cooled in the cooling water tank, and the curing speed of the plastic is accelerated by lowering the temperature of the plastic, thereby allowing the plastic to adhere to the outer surface of the steel pipe.

[0021] According to some embodiments of the present invention, specifically, the feeding and conveying device is provided with a first upper conveyor belt and a first lower conveyor belt, and the first upper conveyor belt and the first lower conveyor belt form the first conveying path.

[0022] According to some embodiments of the present invention, specifically, the feeding and conveying device is provided with a second upper conveyor belt and a second lower conveyor belt, and the second upper conveyor belt and the second lower conveyor belt form the second conveying path.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a three-dimensional structural diagram of the steel pipe rubber-coated blanking assembly provided in this embodiment of the utility model;

[0026] Figure 2 yes Figure 1 The front view of the steel pipe rubber-coated blanking assembly shown;

[0027] Figure 3 yes Figure 1 The top view of the steel pipe rubber-coated blanking assembly shown;

[0028] Figure 4 This is a three-dimensional structural schematic diagram of the adhesive removal device provided in this embodiment of the utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the headgear provided in an embodiment of this utility model.

[0030] In the attached diagram: 100-Extruder, 200-Feeding conveyor, 300-Discharging conveyor, 400-Glue removal device, 500-Roller frame, 110-Annular extrusion head, 120-Support rod, 600-Cooling water tank, 700-Steel pipe, 800-Sleeve head, 810-Support platform, 820-Boss, 210-First frame, 220-First upper conveyor belt, 230-First lower conveyor belt, 310-Second frame, 320-Second upper conveyor belt, 330-Second lower conveyor belt 410-Bracket, 421-Baseboard, 430-Radial motion mechanism, 440-Sensor, 431-Moving block, 451-Air outlet, 420-Axial motion mechanism, 422-Axial motor, 821-Chamfer, 510-Roll-off channel, 520-Blocking mechanism, 521-Baffle, 501-Stationary area, 502-Roll-off area, 530-Trigger, 701-Assembly, 540-Magnetic suction device, 511-Channel notch, 512-Enclosure, 513-Discharge hole. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] like Figures 1 to 3As shown, the steel pipe coating and unloading assembly according to the first aspect of the present invention includes an extruder 100, a feeding conveyor 200, an unloading conveyor 300, a degumming device 400, and a roller frame 500. Taking the conveying direction of the steel pipe 700 as a reference, the feeding conveyor 200, the extruder 100, the degumming device 400, the unloading conveyor 300, and the roller frame 500 are arranged sequentially along the conveying direction of the steel pipe 700, that is, the feeding conveyor 200 is located at the upstream end of the conveying direction, while the roller frame 500 is located at the downstream end of the conveying direction.

[0036] Specifically, since this invention does not improve the internal structure of the extruder 100, the extruder 100 can utilize existing technology, heating plastic granules to a molten state and continuously extruding molten plastic at the extrusion head. Because this invention requires coating the outer surface of the steel pipe 700, the extrusion head can be an annular extrusion head 110. The annular extrusion head 110 has a conveying channel through which the steel pipe 700 can pass, and continuously extrudes plastic onto the steel pipe 700 as it passes through the conveying channel. When the steel pipe 700 is conveyed past the conveying channel, the annular extrusion groove of the annular extrusion head 110 extrudes molten plastic onto the outer surface of the steel pipe 700, and as the steel pipe 700 continues to move, the plastic gradually coats the entire steel pipe 700. To support the position of the annular extrusion head 110, a support rod 120 supported on the ground is connected to the annular extrusion head 110 to prevent deformation of the annular extrusion head 110 due to gravity after long-term use.

[0037] It should be noted that a cooling water tank 600 is also provided downstream of the extruder 100. The cooling water tank 600 is located between the extruder 100 and the adhesive removal device 400. The steel pipe 700 wrapped with plastic is cooled in the cooling water tank 600. By reducing the temperature of the plastic, its curing speed is accelerated, so that the plastic adheres to the outer surface of the steel pipe 700.

[0038] Because the annular extrusion head 110 needs to maintain continuous material output, once one steel pipe 700 is coated, if the other steel pipe 700 does not follow in time, a processing gap will form between the two steel pipes 700. The plastic extruded by the annular extrusion head 110 will accumulate at the end of the previous steel pipe 700, forming a redundant structure. When the next steel pipe 700 passes the conveying channel, the redundant structure cools and hardens, thus hindering the conveying of the next steel pipe 700, preventing the plastic from completely coating the outer surface of the steel pipe 700, resulting in defective products. Therefore, it is necessary to avoid forming processing gaps as much as possible. That is to say, for two adjacent steel pipes 700, it is essential to assemble them end-to-end using the sleeve 800 to form a combined unit.

[0039] like Figure 5As shown, the sleeve 800 includes a base 810 and a boss 820. The boss 820 passes through the center of the base 810 and extends to both sides of the base 810 to form a stepped structure on both sides of the base 810. The outer diameter of the base 810 is larger than the inner diameter of the steel pipe 700, and the outer diameter of the boss 820 is not larger than the inner diameter of the steel pipe 700. In this embodiment, the outer diameter of the base 810 is equal to the outer diameter of the steel pipe 700, and the outer diameter of the boss 820 is equal to the inner diameter of the steel pipe 700. When two adjacent steel pipes 700 need to be assembled, the two ends of the boss 820 are respectively inserted into the interior of the two steel pipes 700. The base 810 is used to separate the two steel pipes 700. At this time, the beginning and end ends of the two adjacent steel pipes 700 are connected by the sleeve 800 to form a combined body. After passing through the extruder 100, the composite will not only be wrapped with plastic on the outer surface of the steel pipe 700, but also on the bearing platform 810 of the sleeve 800. If the steel pipe 700 and the sleeve 800 are to be separated, the plastic on the bearing platform 810 must first be removed.

[0040] like Figure 1 and Figure 2 As shown, to achieve automated separation of two adjacent steel pipes 700, this utility model is equipped with two conveying devices: a feeding conveyor 200 and a discharging conveyor 300. The feeding conveyor 200 includes a first frame 210, a first upper conveyor belt 220, and a first lower conveyor belt 230, both mounted on the first frame 210. Both the first upper conveyor belt 220 and the first lower conveyor belt 230 include a driving pulley, a driven pulley, and a conveyor belt. The driving pulley and the driven pulley are remotely driven by the conveyor belt. When the driving pulley is driven to rotate, it can drive the conveyor belt to rotate, at which point the driven pulley rotates passively.

[0041] The first upper conveyor belt 220 is located directly above the first lower conveyor belt 230, with the two belts spaced vertically apart. A first conveying path is formed between the first upper conveyor belt 220 and the first lower conveyor belt 230. The first upper conveyor belt 220 and the first lower conveyor belt 230 together convey the steel pipe 700, causing it to move along the first conveying path. The first conveying path connects to the conveying channel, allowing the steel pipe 700 to be conveyed along the first conveying path to the conveying channel under the drive of the feeding conveyor device 200, thereby achieving the coating of the steel pipe 700 with rubber.

[0042] Furthermore, to accommodate steel pipes 700 of different sizes and specifications, the first upper conveyor belt 220 is connected to a first lifting mechanism (not shown in the attached figure), while the position of the first lower conveyor belt 230 remains fixed. The first lifting mechanism can be a screw-nut block lifting mechanism, which realizes the up-and-down movement of the nut block through the rotation of the screw. The nut block is fixedly connected to the base plate 421 of the first upper conveyor belt 220, thereby realizing the up-and-down movement of the first upper conveyor belt 220. When the size of the steel pipe 700 is larger than the distance between the first upper conveyor belt 220 and the first lower conveyor belt 230, the first lifting mechanism can be used to widen the distance between the first upper conveyor belt 220 and the first lower conveyor belt 230, so that the conveyor belts of both the first upper conveyor belt 220 and the first lower conveyor belt 230 abut against the steel pipe 700, and the steel pipe 700 is simultaneously subjected to friction from both conveyor belts. When the size of the steel pipe 700 is smaller than the distance between the first upper conveyor belt 220 and the first lower conveyor belt 230, the distance between the first upper conveyor belt 220 and the first lower conveyor belt 230 can be reduced by the first lifting mechanism, so that the conveyor belts of the first upper conveyor belt 220 and the first lower conveyor belt 230 both abut against the steel pipe 700, and the steel pipe 700 is simultaneously subjected to friction from the two conveyor belts.

[0043] Next, when the first upper conveyor belt 220 and the first lower conveyor belt 230 clamp the steel pipe 700 together, only one of the first upper conveyor belt 220 or the first lower conveyor belt 230 needs to be powered to achieve effective conveying of the steel pipe 700. That is, one of the first upper conveyor belt 220 or the first lower conveyor belt 230 is driven by a first power source (not shown in the attached diagram), while the other can be set to a free state, thereby simplifying the structure and saving manufacturing costs. Of course, the first upper conveyor belt 220 and the first lower conveyor belt 230 can also be driven by their respective power sources, and are not limited to the above embodiment.

[0044] In some embodiments, the first lifting mechanism can be connected to the first lower conveyor belt 230, in which case the position of the first upper conveyor belt 220 remains fixed. However, it is generally customary to use the bottom surface of the steel pipe 700 as the positioning reference. If the first lifting mechanism is connected to the first lower conveyor belt 230, this setting will change the positioning reference of the steel pipe 700. Therefore, this embodiment is only an optional embodiment and not a preferred embodiment.

[0045] In addition, the feeding conveyor 300 includes a second frame 310, a second upper conveyor belt 320, and a second lower conveyor belt 330, both of which are mounted on the second frame 310. Both the second upper conveyor belt 320 and the second lower conveyor belt 330 include a driving pulley, a driven pulley, and a conveyor belt. The driving pulley and the driven pulley are remotely driven by the conveyor belt. When the driving pulley is driven to rotate, it can drive the conveyor belt to rotate, at which point the driven pulley rotates passively.

[0046] The second upper conveyor belt 320 is located directly above the second lower conveyor belt 330, with the two belts spaced vertically apart. A second conveying path is formed between the second upper conveyor belt 320 and the second lower conveyor belt 330. The second upper conveyor belt 320 and the second lower conveyor belt 330 together convey the steel pipe 700, causing it to move along the second conveying path. The second conveying path connects to the conveying channel, enabling the unloading conveyor device 300 to receive the steel pipe 700 conveyed from the loading conveyor device 200.

[0047] Furthermore, to accommodate steel pipes 700 of different sizes and specifications, the second upper conveyor belt 320 is connected to a second lifting mechanism (not shown in the attached diagram), while the position of the second lower conveyor belt 330 remains fixed. The second lifting mechanism can be a screw-nut block lifting mechanism, which moves the nut block up and down by rotating the screw. The nut block is fixedly connected to the base plate 421 of the second upper conveyor belt 320, thereby achieving the up and down movement of the second upper conveyor belt 320. When the size of the steel pipe 700 is larger than the distance between the second upper conveyor belt 320 and the second lower conveyor belt 330, the second lifting mechanism can be used to widen the distance between the second upper conveyor belt 320 and the second lower conveyor belt 330, ensuring that both the conveyor belts of the second upper conveyor belt 320 and the second lower conveyor belt 330 abut against the steel pipe 700, and the steel pipe 700 is simultaneously subjected to friction from both conveyor belts. When the size of the steel pipe 700 is smaller than the distance between the second upper conveyor belt 320 and the second lower conveyor belt 330, the distance between the second upper conveyor belt 320 and the second lower conveyor belt 330 can be reduced by the second lifting mechanism, so that the conveyor belts of the second upper conveyor belt 320 and the second lower conveyor belt 330 both abut against the steel pipe 700, and the steel pipe 700 is simultaneously subjected to friction from the two conveyor belts.

[0048] Next, when the second upper conveyor belt 320 and the second lower conveyor belt 330 clamp the steel pipe 700 together, only one of the second upper conveyor belt 320 or the second lower conveyor belt 330 needs to be powered to achieve effective conveying of the steel pipe 700. That is, one of the second upper conveyor belt 320 or the second lower conveyor belt 330 is driven by a second power source (not shown in the attached diagram), while the other can be set to a free state, thereby simplifying the structure and saving manufacturing costs. Of course, the second upper conveyor belt 320 and the second lower conveyor belt 330 can also be driven by their respective power sources, and are not limited to the above embodiment.

[0049] However, regardless of the structure of the unloading conveyor 300, its conveying speed must be set to adjustable. That is, the second power source needs to be selected as a speed-regulating motor. The conveying speed of the unloading conveyor 300 can be adjusted to be synchronized with the conveying speed of the loading conveyor 200, or it can be adjusted to be faster than the conveying speed of the loading conveyor 200.

[0050] In some embodiments, the second lifting mechanism can also be connected to the second lower conveyor belt 330, in which case the position of the second upper conveyor belt 320 remains fixed. However, it is conventional to use the bottom surface of the steel pipe 700 as the positioning reference. If the second lifting mechanism is connected to the second lower conveyor belt 330, this setting will change the positioning reference of the steel pipe 700. Therefore, this embodiment is only an optional embodiment and not a preferred embodiment.

[0051] like Figure 1 and Figure 4 As shown, the adhesive removal device 400 is disposed between the cooling water tank 600 and the unloading conveyor 300. The adhesive removal device 400 includes a bracket 410, a base plate 421, a radial motion mechanism 430, a hot air unit (not shown in the figure), and a sensor 440. The bracket 410 serves as the mounting reference for all components, the base plate 421 is connected to the bracket 410, and the radial motion mechanism 430 is connected to the base plate 421. The radial motion mechanism 430 includes two movable blocks 431, both of which move in the left-right direction. The two movable blocks 431 are driven by cylinders to move closer to or further away from each other. The hot air unit is built into the movable block 431 and has multiple air outlets 451 on the surface of the movable block 431. The air outlets 451 of the hot air unit face the axis of the steel pipe 700. The hot air unit includes a heater and a fan. Since the heater needs to be preheated before normal operation, it needs to be kept on. Since the fan does not need to be preheated before normal operation, it can be controlled by inching.

[0052] In addition, sensor 440 is used to sense the sleeve 800. To ensure that sensor 440 can only sense the sleeve 800, in this embodiment, the sleeve 800 can be a magnetic component, and sensor 440 can be a Hall sensor. Even if the steel pipe 700 passes by the Hall sensor, the Hall sensor will not detect the presence of the steel pipe 700. Of course, sensor 440 and sleeve 800 can also be configured in other ways, and are not limited to the above embodiment.

[0053] This invention does not limit the location of the sensor 440, nor the specific number of movable blocks 431. When the sensor 440 detects the sleeve 800, it feeds back the detection signal to the controller, which then drives the radial motion mechanism 430 and the hot air unit. In this embodiment, the sensor 440 is connected to one of the movable blocks 431, and the sensing direction of the sensor 440 points towards the axis of the steel pipe 700. When the sleeve 800 of the assembly moves to the position of the sensor 440, once the sensor 440 detects the sleeve 800, the two movable blocks 431 move towards the steel pipe 700 under the drive of the cylinders, so that the air outlet 451 of the hot air unit can approach the sleeve 800 and blow hot air onto the plastic wrapped around the sleeve 800 to melt the plastic outside the sleeve 800, thereby satisfying the separation conditions of the steel pipe 700 and the sleeve 800.

[0054] It should be noted that since the position of the hot air unit's outlet 451 remains constant in the direction parallel to the steel pipe axis, when the sleeve 800 of the assembly moves beyond the hot air unit's outlet 451, the hot air unit's fan must stop running, and the two movable blocks 431 move away from the steel pipe 700 under the drive of the cylinder. Because the assembly's conveying speed is fixed, the sensor 440's position is fixed, and the time it takes for the hot air unit to move from the origin to the working position is also fixed, the plastic outside the sleeve 800 can be melted individually through the coordinated operation of various components.

[0055] However, since the outlet 451 of the hot air unit remains in a position parallel to the axis of the steel pipe, and the assembly is always conveyed downstream, the heating time available for the hot air unit is relatively short. To solve the above-mentioned technical problem, the adhesive removal device 400 also includes an axial motion mechanism 420. The axial motion mechanism 420 includes an axial motor 422, a lead screw, a nut block, and the aforementioned base plate 421. The lead screw is parallel to the axis of the steel pipe 700. The axial motor 422 is fixedly connected to the bracket 410 and drives the lead screw to rotate. The lead screw is threadedly connected to the nut block, which is fixedly connected to the lower surface of the base plate 421. Correspondingly, the base plate 421 is slidably connected to the bracket 410 along a direction parallel to the axis of the steel pipe 700, so that the axial motor 422 can drive the base plate 421 to move along a direction parallel to the axis of the steel pipe 700. Since the radial motion mechanism 430 is connected to the substrate 421, when the substrate 421 moves along the axis parallel to the steel pipe 700, the radial motion mechanism 430 can move along the axis parallel to the steel pipe 700 together with the substrate 421, so that the air outlet 451 of the hot air unit can move synchronously with the assembly to provide sufficient time to melt the plastic wrapped around the sleeve 800.

[0056] When the substrate 421 is driven to the designated position, the plastic outside the sleeve 800 has been completely melted by hot air. After that, the axial motor 422 drives the substrate 421 to reset in the opposite direction. At the same time, the movable block 431 of the radial motion mechanism 430 is also reset in preparation for the next glue removal process.

[0057] It should be further explained that since the demagnetization temperature of the 800 sleeve is much higher than the melting temperature of the plastic, the hot air unit will not cause the 800 sleeve to be demagnetized.

[0058] According to the above structure, since the conveying speed of the unloading conveyor 300 is adjustable, after the axial motion mechanism 420 and the radial motion mechanism 430 are fully reset, the conveying speed of the unloading conveyor 300 is set to be greater than the conveying speed of the loading conveyor 200 under the control of the controller. At this time, the conveying speed of the downstream steel pipe 700 is greater than the conveying speed of the upstream steel pipe 700, thereby realizing the separation of the downstream steel pipe 700 from the sleeve 800. After the downstream steel pipe 700 and the sleeve 800 have separated for a certain distance, the conveying speed of the unloading conveyor 300 is reset to be equal to the conveying speed of the loading conveyor 200 under the control of the controller, and the downstream steel pipe 700 enters the rolling frame 500 under the conveying of the unloading conveyor 300.

[0059] like Figure 5As shown, to ensure that the downstream steel pipe 700 can separate from the upstream steel pipe 700 and the sleeve 800 under the drive of the feeding conveyor 300, the two protrusions 820 on both sides of the sleeve 800 need to be set with different chamfer depths 821. Specifically, the chamfer depth 821 of the protrusion 820 near the downstream steel pipe 700 is greater than that of the protrusion 821 near the upstream steel pipe 700. At this time, the sleeve 800 has a directionality. Before using the sleeve 800 to assemble the two steel pipes 700, the direction of the sleeve 800 must be paid attention to at all times to avoid causing confusion in subsequent processes. Since the two protrusions 820 on both sides of the sleeve 800 are set with different chamfer depths 821, the static friction coefficient between the two protrusions 820 and the two steel pipes 700 is different. The deeper the chamfer depth 821 of the protrusion 820, the smaller its static friction coefficient with the steel pipe 700, and the easier it is to separate from the steel pipe 700 when subjected to tension.

[0060] like Figures 1 to 3 As shown, the drop frame 500 is connected downstream of the unloading conveyor 300. The drop frame 500 is used to receive the steel pipe 700 delivered from the unloading conveyor 300. The drop frame 500 is provided with a drop channel 510 that is inclined downwards. The upper end of the drop channel 510 is provided with a blocking mechanism 520. The blocking mechanism 520 is provided with a baffle 521 driven by a cylinder. The baffle 521 moves up and down in the vertical direction under the drive of the cylinder. The blocking mechanism 520 can limit the steel pipe 700 and prevent the steel pipe 700 from tilting due to the drop channel 510 before it is completely detached from the unloading conveyor 300. The baffle 521 divides the rolling channel 510 into a stationary area 501 and a rolling area 502. The stationary area 501 is connected to the feeding conveyor 300. The stationary area 501 is equipped with a trigger 530 at a position away from the feeding conveyor 300. The trigger 530 can be a pressure sensor or a proximity switch. The trigger 530 is used to control the start of the blocking mechanism 520.

[0061] For ease of description, this utility model defines the structure in which a steel pipe 700 and a sleeve 800 are connected as an assembly 701. When the assembly 701 is conveyed to the trigger 530 by the feeding conveyor 300, the trigger 530 sends feedback to the controller. Upon receiving the feedback, the controller controls the baffle 521 of the blocking mechanism 520 to descend, thereby connecting the stationary area 501 with the rolling area 502. When the assembly 701 is completely detached from the feeding conveyor 300, the trigger 530 is activated, and the baffle 521 of the blocking mechanism 520 descends, allowing the assembly 701 to roll down the rolling channel 510 to its lower end.

[0062] In addition, the roll-off frame 500 is equipped with a magnetic suction device 540 and a channel notch 511 on both sides of the lower end of the roll-off channel 510. Since the sleeve 800 of the assembly 701 is located downstream of the steel pipe 700, the channel notch 511 is closer to the unloading conveyor 300 than the magnetic suction device 540. When the assembly 701 rolls to the lower end of the roll-off channel 510, the sleeve 800 of the assembly 701 is close to the magnetic suction device 540. The magnetic suction device 540 is energized to attract the sleeve 800. Finally, the steel pipe 700 is pulled out of the roll-off channel 510 through the channel notch 511 by manual dragging or robotic dragging, thereby separating the sleeve 800 from the steel pipe 700.

[0063] Furthermore, the width of the rolling channel 510 is consistent with the length of the assembly 701, and the outer perimeter of the rolling channel 510 is provided with a barrier 512, so that when the assembly 701 rolls to the lower end of the rolling channel 510, the head 800 of the assembly 701 can be attracted by the magnetic attraction device 540.

[0064] Furthermore, the drop frame 500 has a discharge hole 513 near the magnetic suction device 540. The size of the discharge hole 513 is larger than the size of the sleeve 800, so that after the sleeve 800 is separated from the steel pipe 700, once the magnetic suction device 540 is set to the power-off state, even if the sleeve 800 has a certain magnetism, the magnetic force between it and the magnetic suction device 540 is not enough to counteract the weight of the sleeve 800 itself. In the end, the sleeve 800 will fall into the discharge hole 513 to achieve the collection of the sleeve 800.

[0065] Finally, although the steel pipe 700 and the sleeve 800 are separated, some plastic will adhere to the end of the steel pipe 700 during the process of melting the plastic of the sleeve 800. Therefore, in subsequent processes, the excess plastic needs to be cut off, or a longer section can be cut directly from the steel pipe 700 as the standard length of the steel pipe 700.

[0066] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A steel pipe coating and cutting assembly, characterized in that, include: An extruder (100) is provided with an annular extrusion head (110) having a conveying channel through which a steel pipe (700) can pass, and the annular extrusion head (110) extrudes plastic toward the steel pipe (700) that passes through the conveying channel. A feeding conveyor (200) is located upstream of the extruder (100), the feeding conveyor (200) having a first conveying path connected to the conveying channel; A feeding conveyor (300) is provided downstream of the extruder (100), the feeding conveyor (300) has a second conveying path connected to the conveying channel, and the conveying speed of the feeding conveyor (300) is adjustable; A glue removal device (400) is disposed between the extruder (100) and the feeding conveyor (300). The glue removal device (400) is provided with a glue removal module and a sensor (440) for sensing the sleeve (800). When the sensor (440) senses the sleeve (800), the glue removal module removes the plastic wrapped around the sleeve (800). A drop frame (500) is connected downstream of the unloading conveyor (300). The drop frame (500) is provided with a drop channel (510) that is inclined from top to bottom. The drop frame (500) is provided with a magnetic attraction device (540) and a channel notch (511) on both sides of the lower end of the drop channel (510). The channel notch (511) is closer to the unloading conveyor (300) than the magnetic attraction device (540).

2. The steel pipe coating and blanking assembly according to claim 1, characterized in that: The sleeve (800) includes a base (810) and a boss (820). The boss (820) passes through the base (810) and extends to both sides of the base (810). The outer diameter of the base (810) is larger than the inner diameter of the steel pipe (700), and the outer diameter of the boss (820) is not larger than the inner diameter of the steel pipe (700).

3. The steel pipe coating and blanking assembly according to claim 2, characterized in that: The sleeve (800) is a magnetic component, and the sensor (440) is a Hall sensor.

4. The steel pipe coating and blanking assembly according to claim 1 or 3, characterized in that: The adhesive removal module includes a radial motion mechanism (430) and a hot air unit. The radial motion mechanism (430) is provided with at least two movable blocks (431) that move radially along the steel pipe (700). Each movable block (431) is connected to the hot air unit, and the air outlet (451) of the hot air unit faces the axis of the steel pipe (700).

5. The steel pipe coating and blanking assembly according to claim 4, characterized in that: The adhesive removal module also includes an axial motion mechanism (420), which moves along an axis parallel to the steel pipe (700), and a radial motion mechanism (430) is connected to the axial motion mechanism (420).

6. The steel pipe coating and blanking assembly according to claim 1, characterized in that: The upper end of the rolling channel (510) is provided with a blocking mechanism (520). The blocking mechanism (520) is provided with a liftable baffle (521). The baffle (521) divides the rolling channel (510) into a stationary area (501) and a rolling area (502). The stationary area (501) is connected to the feeding conveyor (300). The stationary area (501) is provided with a trigger (530) at a position away from the feeding conveyor (300). The trigger (530) is electrically connected to the blocking mechanism (520).

7. The steel pipe coating and blanking assembly according to claim 1 or 6, characterized in that: One of the steel pipes (700) and one of the sleeves (800) are connected to each other to form a combination (701), and the width of the rolling channel (510) is consistent with the length of the combination (701).

8. The steel pipe coating and blanking assembly according to claim 1, characterized in that: It also includes a cooling water tank (600) disposed between the extruder (100) and the glue removal device (400).

9. The steel pipe coating and blanking assembly according to claim 1, characterized in that: The feeding and conveying device (200) is provided with a first upper conveyor belt (220) and a first lower conveyor belt (230), and the first upper conveyor belt (220) and the first lower conveyor belt (230) form the first conveying path.

10. The steel pipe coating and blanking assembly according to claim 1, characterized in that: The feeding conveying device (300) is provided with a second upper conveyor belt (320) and a second lower conveyor belt (330), and the second conveying path is formed between the second upper conveyor belt (320) and the second lower conveyor belt (330).

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