Plastic Steel Pipe Continuous Coating Loading Device and Loading Method

Abstract

The present invention provides a feeding device and a feeding method for continuously coating plastic steel pipes. A plurality of rows of roller assemblies are arranged at intervals on a bracket. Two rubber tires are fixedly arranged on the rotating shaft of the roller assembly and located between two bearings. The distance between the two rubber tires is less than the outer diameter of the plastic steel pipe. The plastic steel pipe is supported by the rubber tires, and the rubber tires and the rotating shaft are driven by a driving system to rotate synchronously to drive the supported plastic steel pipe to move forward. The steps include: inserting the first ring body of the collar into the socket at the tail of the first plastic steel pipe, so that the tail end of the first plastic steel pipe abuts against the annular boss of the first ring body; placing the second plastic steel pipe on the tire behind the collar, so that the front part of the second plastic steel pipe is inserted into the second ring body of the collar, and the front end of the second plastic steel pipe abuts against the annular boss of the second ring body. The present invention can not only greatly improve the feeding efficiency of plastic steel pipes required for continuous coating of plastic steel pipes, but also simplify the operation process, and can also greatly reduce the labor intensity of operators.

Description

Technical Field

[0001] The present invention relates to a continuous coating device for plastic steel pipes, and particularly to a feeding device and a feeding method for continuous coating of plastic steel pipes. Background Art

[0002] Continuous coating of plastic steel pipes means continuously coating multiple plastic steel pipes arranged axially adjacent to each other (i.e., the ends of any two adjacent plastic steel pipes are in contact with each other). The purpose of continuous coating of plastic steel pipes is mainly to improve the production efficiency and quality of coated plastic steel pipes, which is beneficial to reducing a large number of coating joints and avoiding frequent start and stop of coating equipment. After multiple plastic steel pipes are continuously coated, since the ends of adjacent plastic steel pipes are also covered with a coating layer, it is necessary to cut off the coating layer at the ends of adjacent plastic steel pipes.

[0003] Before continuous coating of plastic steel pipes, multiple plastic steel pipes need to be arranged axially adjacent to each other at a specific position. In the existing method, usually, workers cooperate with a hoisting device to lift and place the pipes, and then fix the plastic steel pipes with a positioning tooling before coating. This method has problems such as low feeding efficiency, cumbersome procedures, and high labor intensity. On average, only two plastic steel pipes can be arranged in order every ten minutes, and the operator needs to repeatedly adjust the position of the plastic steel pipes. Therefore, it is necessary to develop a device and a feeding method that can quickly and accurately feed plastic steel pipes continuously. Summary of the Invention

[0004] The purpose of the present invention is to provide a feeding device and a feeding method for continuous coating of plastic steel pipes at least for the problems in the background art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions.

[0006] The feeding device for continuous coating of plastic steel pipes includes a bracket, on which multiple rows of roller assemblies are arranged at intervals. The roller assembly includes a rotating shaft, and all the rotating shafts are arranged in parallel. The two ends of the rotating shaft are connected to the bracket through bearings. On the rotating shaft and between the two bearings, two rubber tires are fixedly arranged. The distances between the two rubber tires on all the rotating shafts are the same, and the distance between the two rubber tires is less than the outer diameter of the plastic steel pipe. The plastic steel pipe is supported by the rubber tires, and the rubber tires and the rotating shaft are driven by a driving system to rotate synchronously to drive the supported plastic steel pipe to move forward.

[0007] In order to feed more accurately, a keyway is axially arranged on the rotating shaft, and a strip key is fitted in the keyway. The rubber tire is fixed on the rotating shaft by the strip key.

[0008] In order to load materials more accurately, stably and quickly, it further includes a detachable collar. The collar includes a first ring body and a second ring body which are coaxial and arranged at intervals. The inner diameters of the first ring body and the second ring body are equal to the inner diameter of the plastic steel pipe. The lengths of the first ring body and the second ring body are not greater than the socket depth of the plastic steel pipe. The first ring body and the second ring body are connected together by rib strips. Annular protrusions are provided on the outer walls of the first ring body and the second ring body and near the rib strips. The outer diameter of the annular protrusion is equal to the outer diameter of the plastic steel pipe.

[0009] In order to facilitate cutting off the film layer in subsequent processes, the distance between the annular protrusion and the inner side end of its ring body does not exceed 20 mm.

[0010] In order to facilitate the installation of the collar, slopes are provided at the outer ends of the first ring body and the second ring body.

[0011] Preferably, the driving system is connected to the rotating shaft at the tail end.

[0012] A plastic steel pipe feeding process using the aforementioned plastic steel pipe continuous coating feeding device, the steps include:

[0013] Step 1, place the first plastic steel pipe on the rubber tire of the feeding device;

[0014] Step 2, start the driving system of the feeding device and move the first plastic steel pipe to the designated position;

[0015] Step 3, take a collar and insert its first ring body into the socket at the tail of the first plastic steel pipe, so that the tail end of the first plastic steel pipe abuts against the annular protrusion of the first ring body;

[0016] Step 4, place the second plastic steel pipe on the tire behind the collar, insert the front part of the second plastic steel pipe onto the second ring body of the collar, so that the front end of the second plastic steel pipe abuts against the annular protrusion of the second ring body;

[0017] Step 5, control the operation of the feeding device, drive the plastic steel pipe and the collar to move forward at a constant speed, and install a collar at all adjacent plastic steel pipe connection parts with reference to Step 3 and Step 4.

[0018] Preferably, in Step 1, each plastic steel pipe is placed on the rubber tire at the tail of the feeding device.

[0019] Beneficial effects: By adopting the solution of the present invention, not only can the feeding efficiency of plastic steel pipes required for continuous coating of plastic steel pipes be greatly improved, and it only takes less than one minute on average to successfully achieve the axial close arrangement of two plastic steel pipes, but also the operation process can be simplified, and the labor intensity of operators can be greatly reduced. During operation, only manual assistance is required to place the plastic steel pipes and insert the sleeve rings, eliminating the process of repeatedly adjusting the position of the plastic steel pipes. More importantly, by adopting the present invention, the plastic steel pipes to be continuously coated can be stably and accurately positioned, and it can be ensured that the coaxiality error of two axially adjacent plastic steel pipes does not exceed 5 mm. Brief Description of the Drawings

[0020] Figure 1 Fig. is a schematic diagram of the feeding state of the plastic steel pipe continuous coating feeding device in the embodiment, and the direction indicated by the arrow represents the forward movement direction of the plastic steel pipe;

[0021] Figure 2 Fig. is a partial schematic diagram of the plastic steel pipe continuous coating feeding device in the embodiment;

[0022] Figure 3 Fig. is a partial schematic diagram when the sleeve ring is installed at the ends of two plastic steel pipes. Detailed Embodiment

[0023] The present invention will be further described below in conjunction with the drawings and specific embodiments. However, the description of the following embodiments is only used to help understand the principle and core idea of the present invention, and does not limit the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, improvements made to the present invention without departing from the principle of the present invention also fall within the protection scope of the claims of the present invention. Embodiment

[0024] First, the plastic steel pipe continuous coating feeding device will be described. As Figures 1 to 3 shown, it includes a bracket 1. The bracket 1 is a rectangular frame. A plurality of rows of roller assemblies are arranged at intervals on the bracket 1. One row of roller assemblies is arranged every 50 cm. The roller assembly includes a rotating shaft 2. All the rotating shafts 2 are arranged in parallel. The two ends of the rotating shaft 2 are connected to the bracket 1 through bearings 3. Two rubber tires 4 are fixedly arranged on the rotating shaft 2 and between the two bearings 3. The distances between the two rubber tires 4 on all the rotating shafts 2 are the same. The distance between the two rubber tires 4 is less than the outer diameter of the plastic steel pipe. The plastic steel pipe is supported by the rubber tires 4, and the rubber tires 4 and the rotating shaft 2 are driven by a drive system 7 to rotate synchronously to drive the supported plastic steel pipe to move forward.

[0025] Among them, a keyway is axially arranged on the rotating shaft 2, and a strip key is fitted in the keyway. The rubber tire 4 is fixed on the rotating shaft 2 by the strip key. The drive system 7 is connected to the rotating shaft 2 at the tail end

[0026] In this example, the continuous coating feeding device for plastic steel pipes further includes a detachable collar 10. The collar 10 includes a first ring body 11 and a second ring body 12 that are coaxially arranged and spaced apart. The inner diameters of the first ring body 11 and the second ring body 12 are equal to the inner diameter of the plastic steel pipe (ignoring the fit tolerance / error). The lengths of the first ring body 11 and the second ring body 12 are not greater than the socket depth of the plastic steel pipe. The first ring body 11 and the second ring body 12 are connected together by rib strips 13. Annular protrusions 14 are provided on the outer walls of the first ring body 11 and the second ring body 12 and near the rib strips 13. The outer diameter of the annular protrusion 14 is equal to the outer diameter of the plastic steel pipe. Among them, the distance between the annular protrusion 14 and the inner end of its ring body does not exceed 20 mm; slopes 15 are provided at the outer ends of the first ring body 11 and the second ring body 12.

[0027] In this example, the bracket 1 is made of steel with a protective layer, the ring bodies of the collar 10 are made of aluminum alloy with a thickness of 5 mm, the diameter of each rib strip 13 is 10 mm, and the thickness of each annular protrusion 14 is 10 mm.

[0028] A plastic steel pipe feeding process using the continuous coating feeding device for plastic steel pipes in this embodiment includes the following steps:

[0029] Step 1: Place the first plastic steel pipe 21 on the rubber tire 4 at the tail of the feeding device.

[0030] Step 2: Turn on the drive system 7 of the feeding device and pause when the first plastic steel pipe 21 is moved to the designated position.

[0031] Step 3: Take a collar 10 and insert its first ring body 11 into the socket at the tail of the first plastic steel pipe 21, so that the tail end of the first plastic steel pipe 21 abuts against the annular protrusion 14 of the first ring body 11.

[0032] Step 4: Place the second plastic steel pipe 22 behind the collar 10, insert the front part of the second plastic steel pipe 22 onto the second ring body 12 of the collar 10, and make the front end of the second plastic steel pipe 22 abut against the annular protrusion 14 of the second ring body 12. Specifically, place the second plastic steel pipe 22 on the rubber tire 4 on the rotating shaft 2 at the tail end, and then drive the rotating shaft 2 at the tail end to run through the drive system 7, move the second plastic steel pipe 22 behind the collar 10 and insert it onto the second ring body 12 of the collar 10. The state at this time is as Figure 1 shown;

[0033] Step 5: Control the operation of the feeding device, drive the plastic steel pipe 21 and the collar 10 to move forward at a constant speed, and install a collar 10 at all adjacent plastic steel pipe connection parts with reference to Step 3 and Step 4, that is, place a plastic steel pipe again every time a collar 10 is installed, so as to achieve continuous feeding.

[0034] In this solution, a collar 10 is cleverly used as a temporary connecting piece for two plastic steel pipes. The rubber tire 4 at the tail of the feeding device is driven to rotate by the driving system 7 to push the plastic steel pipe forward. Since the first ring body 11 and the second ring body 12 of the collar 10 are both inserted into the inner cavity of the end of the plastic steel pipe and there is an annular boss 14 abutting against the end face of the plastic steel pipe, this structure can conduct the thrust very stably. Therefore, only by pushing the plastic steel pipe at the rear can the plastic steel pipe in the front be driven to move smoothly; during the feeding process, installing the collar 10 is convenient and fast. It can not only quickly, stably and smoothly ensure the coaxiality of the plastic steel pipe and the collar 10, but also facilitate the tool to extend into the inner and outer sides of the annular boss 14 or the tool to be abutted against the inner side edge of the annular boss 14, which is convenient for quickly cutting off the film layer in the subsequent process.

[0035] This solution can not only greatly improve the feeding efficiency of plastic steel pipes required for continuous coating of plastic steel pipes. On average, it only takes less than one minute to successfully achieve the axial close arrangement of two plastic steel pipes (for plastic steel pipes with a diameter of DN900mm and a length of 6m, the average time for continuously feeding 20 plastic steel pipes). Moreover, it can simplify the operation process, and can also greatly reduce the labor intensity of operators. During operation, only manual assistance is needed to place the plastic steel pipe and insert the collar 10, eliminating the process of repeatedly adjusting the position of the plastic steel pipe; more importantly, adopting this solution can stably and accurately position the plastic steel pipes required for continuous coating, and can ensure that the coaxiality error of two axially adjacent plastic steel pipes does not exceed 5mm.

Claims

1. Plastic steel pipe continuous coating feeding device, including a bracket (1), Characterized in that: On the bracket (1), multiple rows of roller assemblies are arranged at intervals. The roller assembly includes a rotating shaft (2). All the rotating shafts (2) are arranged in parallel. The two ends of the rotating shaft (2) are connected to the bracket (1) through bearings (3). On the rotating shaft (2) and between the two bearings (3), two rubber tires (4) are fixedly arranged. The distance between the two rubber tires (4) on all the rotating shafts (2) is the same. The distance between the two rubber tires (4) is less than the outer diameter of the plastic steel pipe. The plastic steel pipe is supported by the rubber tires (4), and the rubber tires (4) and the rotating shaft (2) are driven by the drive system (7) to rotate synchronously to drive the supported plastic steel pipe to move forward; A keyway is axially arranged on the rotating shaft (2), and a strip key is fitted in the keyway. The rubber tire (4) is fixed on the rotating shaft (2) by the strip key; It also includes a detachable collar (10). The collar (10) includes a first ring body (11) and a second ring body (12) arranged coaxially and at intervals. The inner diameter of the first ring body (11) and the inner diameter of the second ring body (12) are equal to the inner diameter of the plastic steel pipe. The length of the first ring body (11) and the length of the second ring body (12) are not greater than the socket depth of the plastic steel pipe. The first ring body (11) and the second ring body (12) are connected together by a rib (13). On the outer walls of the first ring body (11) and the second ring body (12) and near the rib (13), annular bosses (14) are arranged. The outer diameter of the annular boss (14) is equal to the outer diameter of the plastic steel pipe.

2. The plastic steel pipe continuous coating feeding device according to claim 1, Characterized in that: The distance between the annular boss (14) and the inner end of its ring body does not exceed 20 mm.

3. The plastic steel pipe continuous coating feeding device according to claim 2, Characterized in that: Slopes (15) are arranged at the outer ends of the first ring body (11) and the second ring body (12).

4. The plastic steel pipe continuous coating feeding device according to claim 3, Characterized in that: The drive system (7) is connected to the rotating shaft (2) at the tail end.

5. A plastic steel pipe feeding process using the plastic steel pipe continuous coating feeding device according to any one of claims 2-4, Characterized in that the steps include: Step 1, place the first plastic steel pipe (21) on the rubber tire (4) of the feeding device; Step 2, turn on the drive system (7) of the feeding device and move the first plastic steel pipe (21) to the designated position; Step 3, take a collar (10), insert its first ring body (11) into the socket at the tail of the first plastic steel pipe (21), so that the tail end of the first plastic steel pipe (21) abuts against the annular boss (14) of the first ring body (11); Step 4, place the second plastic steel pipe (22) behind the collar (10), so that the front part of the second plastic steel pipe (22) is inserted on the second ring body (12) of the collar (10), so that the front end of the second plastic steel pipe (22) abuts against the annular boss (14) of the second ring body (12); Step 5, control the operation of the feeding device, drive the plastic steel pipe (21) and the collar (10) to move forward at a uniform speed, and install a collar (10) at all adjacent connecting parts of the plastic steel pipes with reference to Step 3 and Step 4.

6. The plastic steel pipe feeding process according to claim 5, characterized in that: In Step 1, each plastic steel pipe is placed on the rubber tire (4) at the tail of the feeding device.

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