Device for monitoring temperature of PE-RT (polyethylene of raised temperature resistance) pipe on line

Abstract

The utility model discloses a device for monitoring PE-RT pipe temperature on line, which comprises a cooling water tank, a pair of reversing roller assemblies, at least two lifting support assemblies and a temperature sensor, the cooling water tank is provided with two first side walls and two second side walls, the two first side walls are respectively provided with a pipe inlet and a pipe outlet, and the two second side walls are respectively provided with a pipe inlet and a pipe outlet. The reversing roller assemblies comprise reversing rollers, the two reversing rollers are fixedly installed in the cooling water tank, one reversing roller is close to one second side wall, the other reversing roller is close to the other second side wall, and the multiple supporting and guiding assemblies are distributed between the two reversing rollers. One supporting and guiding assembly is located between the pipe inlet and one reversing roller, the other supporting and guiding assembly is located between the other reversing roller and the pipe outlet, and the temperature sensor is installed on the pipe outlet. According to the device, the offline pipe temperature of the PE-RT pipe is monitored through the temperature sensor at the pipe outlet of the cooling water tank, and the offline pipe temperature of the pipe is controlled according to qualified temperature ranges in different seasons.

Description

Technical Field

[0001] The utility model relates to the technical field of PE-RT pipe production, and particularly relates to a device for on-line monitoring of the temperature of PE-RT pipes. Background Technique

[0002] At present, due to different ambient temperatures in different seasons, the temperature of the PE-RT pipes when they come off the production line is greatly affected. In winter, the ambient temperature is low, and the temperature of the pipes when they come off the production line is relatively low, which may lead to the quality problem that the longitudinal shrinkage rate of the PE-RT pipes is unqualified. In summer, the ambient temperature is high, and the temperature of the pipes when they come off the production line is high, which may lead to the problem that the outer diameter of the PE-RT pipes is small.

[0003] In winter, after the PE-RT pipes are cooled and shaped and placed for 48 hours, the longitudinal shrinkage rate of the PE-RT pipes is detected, and the temperature of the pipes when they come off the production line is adjusted according to the detection result of the longitudinal shrinkage rate. This method has a long feedback time. Once the longitudinal shrinkage rate is unqualified, it will lead to the production of more unqualified products, causing serious waste. In summer, after the PE-RT pipes are coiled, the outer diameter of each coil of pipes is measured, and the temperature of the pipes when they come off the production line is adjusted according to the detection result of the outer diameter. This method cannot monitor in real time, and it will also produce a certain number of unqualified products, causing a certain amount of waste. Moreover, the detection workload is large, which is a waste of manpower. Summary of the Invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a device for on-line monitoring of the temperature of PE-RT pipes. The device has a simple structure. The temperature sensor at the outlet of the cooling water tank for the pipes monitors the temperature of the PE-RT pipes when they come off the production line, and controls the temperature of the pipes when they come off the production line according to the qualified temperature range in different seasons, so as to avoid the quality hidden danger of various unqualified problems of the PE-RT pipes in different seasons.

[0005] The technical solution adopted to achieve the above object of the utility model is as follows:

[0006] An apparatus for online monitoring of the temperature of PE-RT pipes, comprising a cooling water tank, the cooling water tank having two first side walls and two second side walls, the two first side walls being directly opposite each other, the two second side walls being directly opposite each other, further comprising a pair of reversing roller assemblies, at least two lifting and supporting assemblies and a temperature sensor. Pipe inlets and pipe outlets are respectively provided on the two first side walls. The reversing roller assemblies include reversing rollers, the two reversing rollers are respectively fixedly installed in the cooling water tank, the axes of the two reversing rollers are respectively perpendicular to the axis of the pipe inlet, one of the reversing rollers is close to one of the second side walls, and the other reversing roller is close to the other second side wall. A plurality of support and guiding assemblies are distributed between the two reversing rollers, one support and guiding assembly is located between the pipe inlet and one of the reversing rollers, and one support and guiding assembly is located between the other reversing roller and the pipe outlet. The temperature sensor is installed on the pipe outlet.

[0007] The lifting and supporting assembly described above includes a lifting assembly and a support and guiding assembly. The fixed part of the lifting assembly is installed at the corresponding position on the bottom of the cooling water tank. The support and guiding assembly includes a pair of support and guiding rollers symmetrically distributed up and down and a roller bracket. The two support and guiding rollers are respectively movably installed on the roller bracket. The axes of the two support and guiding rollers are respectively parallel to the axis of the pipe inlet. The roller grooves on the two support rollers enclose a guiding channel for the pipe to pass through.

[0008] The lifting assembly described above is an oil cylinder. The housing of the oil cylinder is fixed at the corresponding position on the bottom of the cooling water tank. The piston rod of the oil cylinder is fixedly connected to the first roller bracket.

[0009] The support and guiding assembly further includes two first roller shafts. The roller bracket is U-shaped. The two first roller shafts are both located inside the roller bracket. The two first roller shafts are symmetrically distributed up and down. The two ends of each first roller shaft are respectively installed on both sides of the roller bracket through bearings. The piston rod of the oil cylinder is fixedly connected to the exact middle position at the bottom of the roller bracket.

[0010] The reversing roller assembly described above further includes a support vertical plate and a second roller shaft. The bottom of the support vertical plate is fixed at the corresponding position on the bottom of the cooling water tank. The support vertical plate is perpendicular to the bottom of the cooling water tank. One end of the second roller shaft is installed on the support vertical plate through a bearing, and the second roller shaft is perpendicular to the support vertical plate.

[0011] There are three lifting and supporting assemblies described above. The three lifting and supporting assemblies are linearly distributed. The straight line where the three lifting and supporting assemblies are distributed is perpendicular to the axis of the pipe inlet.

[0012] The temperature sensor described above is annular.

[0013] Compared with the prior art, the beneficial effects and advantages of the present utility model are as follows:

[0014] 1. The device is provided with a commutation roller assembly and a lifting support assembly. The commutation roller assembly and the lifting support assembly can greatly increase the travel of the PE-RT pipe in the cooling water tank, thereby greatly reducing the size of the cooling water tank, the floor area, and the amount of cooling water used, and thus reducing the production cost of the PE-RT pipe.

[0015] 2. The device can set the set lower limit pipe temperature on the controller according to the season (the set lower limit pipe temperature is the lower limit pipe temperature of the PE-RT pipe adapted to this season). The lower limit pipe temperature of the PE-RT pipe is monitored in real time through a temperature sensor. The temperature sensor feeds back the lower limit pipe temperature of the PE-RT pipe monitored in real time to the controller. The controller adjusts the height of the lifting support assembly in real time according to the lower limit pipe temperature of the PE-RT pipe monitored by the temperature sensor in real time. The height of the lifting support assembly can determine the volume of the part of the PE-RT pipe immersed in the cooling water in the cooling water tank. Thus, the lower limit pipe temperature of the PE-RT pipe can be controlled within the set lower limit pipe temperature by adjusting the lifting support assembly in real time.

[0016] 3. The device can detect the lower limit pipe temperature of the PE-RT pipe in real time, which not only greatly reduces the generation of unqualified products, minimizes the waste of pipes, but also does not require manual monitoring, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a device for online monitoring of the temperature of PE-RT pipes.

[0018] Figure 2 It is Figure 1 the sectional view taken along line A-A in

[0019] Figure 3 It is Figure 2 the partial enlarged view of I in

[0020] Among them, 1 - cooling water tank: 101 - first side wall, 102 - second side wall; 2 - pipe inlet; 3 - pipe outlet; 4 - oil cylinder; 5 - support guide roller; 6 - first roller shaft; 7 - roller bracket; 8 - commutation roller; 9 - second roller shaft; 10 - temperature sensor; 11 - controller; 12 - PE-RT pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present invention will be described in detail below with reference to the accompanying drawings.

[0022] The structure of the device for online monitoring of the temperature of PE-RT pipes provided in this embodiment is as Figure 1-2 shown, including the cooling water tank 1, a pair of commutation roller assemblies, three lifting support assemblies, a temperature sensor 10, and a controller 11.

[0023] The cooling water tank 1 has two first side walls 101 and two second side walls 102. The two first side walls 101 face each other directly and are parallel to each other. The two second side walls 102 face each other directly. A pipe inlet 2 and a pipe outlet 3 are respectively provided on the two first side walls 101.

[0024] The two commutation roller assemblies are respectively located inside the two first side walls 101. The two commutation roller assemblies, the pipe inlet 2 and the pipe outlet 3 are respectively close to the four corners of the cooling water tank 1.

[0025] Three lifting support assemblies are located between the two commutation roller assemblies. The three lifting support assemblies are linearly distributed. The lifting support assemblies on both sides are symmetrically distributed with respect to the lifting support assembly in the middle. The lifting support assemblies on both sides are respectively close to the two second side walls 102. The straight lines where the three lifting support assemblies are distributed are respectively parallel to the two first side walls 101. The two first side walls 101 are symmetrically arranged with respect to the straight line where the three lifting support assemblies are distributed. The support and guiding assembly on one side is located between the pipe inlet 2 and one of the commutation roller assemblies, and the support and guiding assembly on the other side is located between the other commutation roller assembly and the pipe outlet 3.

[0026] The lifting support assembly includes a lifting assembly and a support and guiding assembly. The lifting assembly is an oil cylinder 4, and the housing of the oil cylinder 4 is fixed at the corresponding position on the bottom of the cooling water tank 1. The support and guiding assembly includes a pair of support and guiding rollers 5, a pair of first roller shafts 6 and a roller bracket 7. The roller bracket 7 is U-shaped. The two first roller shafts 6 are both located inside the roller bracket 7 and are symmetrically distributed up and down. The two ends of each first roller shaft 6 are respectively installed on both sides of the roller bracket 7 through bearings. The two first roller shafts 6 are respectively parallel to the two first side walls 101. The two support and guiding rollers 5 are symmetrically distributed up and down. The two support and guiding rollers 5 are respectively fixedly sleeved on the two first roller shafts 6. The roller grooves on the two support and guiding rollers 5 enclose to form a guiding channel for the PE-RT pipe 12. The piston rod of the oil cylinder 4 is fixedly connected to the middle position at the bottom of the roller bracket 7. By lifting and lowering the piston rod of the oil cylinder 4, the lifting of the roller bracket 7 is controlled, so as to control the lifting of the two support and guiding rollers 5, and further control the lifting of the PE-RT pipe 12 supported by the two support and guiding rollers 5.

[0027] The commutation roller assembly includes a commutation roller 8, a support vertical plate (not shown) and a second roller shaft 9. The bottom of the support vertical plate is fixed at the corresponding position on the bottom of the cooling water tank 1. The support vertical plate is perpendicular to the bottom of the cooling water tank 1. One end of the second roller shaft 9 is installed on the support vertical plate through a bearing, and the second roller shaft 9 is perpendicular to the support vertical plate. The commutation roller 8 is fixedly sleeved on the second roller shaft 9. Since the PE-RT pipe 12 is a flexible pipe, it can be commuted through the commutation roller 8, thereby greatly increasing the stroke of the PE-RT pipe 12 in the cooling water tank 1.

[0028] AsFigure 3 As shown, the temperature sensor 10 is annular, fixedly installed on the pipe outlet 3, and the temperature sensor 10 is coaxial with the pipe outlet 3. The controller 11 is respectively connected to the temperature sensor 10 and the solenoid valves of the three oil cylinders 4.

[0029] According to different seasons, the offline pipe temperature of the PE-RT pipe 12 (i.e., the set offline pipe temperature) adapted to the season is set on the controller 11. After the PE-RT pipe 12 is extruded and formed, it is pulled by a tractor to the cooling water tank 1, and under the action of the reversing roller assembly and the support and guiding assembly, the stroke of the PE-RT pipe 12 in the cooling water tank 1 is increased.

[0030] After the PE-RT pipe 12 is cooled by the cooling water tank, the offline pipe temperature of the PE-RT pipe 12 is monitored through the induction ring of the temperature sensor 10 located at the pipe outlet 3. The temperature sensor 10 feeds back the monitored offline pipe temperature to the controller 11. If the monitored offline pipe temperature by the temperature sensor 10 is higher than the set offline pipe temperature, the controller 11 controls at least one oil cylinder 4 to start working, and the piston rod of at least one oil cylinder 4 starts to move downward, increasing the volume of the PE-RT pipe 12 immersed in the cooling water. When the monitored offline pipe temperature by the temperature sensor 10 is within the set offline pipe temperature, the controller 11 controls the above-mentioned oil cylinder 4 to stop working. If the monitored offline pipe temperature by the temperature sensor 10 is lower than the set offline pipe temperature, the controller 11 controls at least one oil cylinder 4 to start working, and the piston rod of at least one oil cylinder 4 starts to move upward, reducing the volume of the PE-RT pipe 12 immersed in the cooling water. When the monitored offline pipe temperature by the temperature sensor 10 is within the set offline pipe temperature, the controller 11 controls the above-mentioned oil cylinder to stop working.

Claims

1. A device for online monitoring of the temperature of a PE-RT pipe, comprising a cooling water tank, the cooling water tank having two first side walls and two second side walls, the two first side walls being directly opposite to each other, and the two second side walls being directly opposite to each other, characterized in that: It also includes a pair of reversing roller assemblies, at least two lifting support assemblies and a temperature sensor. A pipe inlet and a pipe outlet are respectively provided on the two first side walls. The reversing roller assembly includes a reversing roller. The two reversing rollers are respectively fixedly installed in the cooling water tank. The axes of the two reversing rollers are respectively perpendicular to the axis of the pipe inlet. One of the reversing rollers is close to one of the second side walls, and the other reversing roller is close to the other second side wall. Multiple support and guide assemblies are distributed between the two reversing rollers, one support and guide assembly is located between the pipe inlet and one of the reversing rollers, and one support and guide assembly is located between the other reversing roller and the pipe outlet. The temperature sensor is installed on the pipe outlet.

2. The device for online monitoring of PE-RT pipe temperature according to claim 1, characterized in that: The lifting support assembly includes a lifting assembly and a support guide assembly. The fixed part of the lifting assembly is installed at a position corresponding to the bottom of the cooling water tank. The support guide assembly includes a pair of support guide rollers and roller brackets symmetrically distributed up and down. The two support guide rollers are movably installed on the roller brackets respectively. The axes of the two support guide rollers are parallel to the axis of the pipe inlet respectively. The roller grooves on the two support rollers enclose a guide channel for the pipe to pass through.

3. The device for online monitoring of PE-RT pipe temperature according to claim 2, characterized in that: The lifting component is an oil cylinder, the shell of the oil cylinder is fixed at a position corresponding to the bottom of the cooling water tank, and the piston rod of the oil cylinder is fixedly connected to the first roller bracket.

4. The device for online monitoring of PE-RT pipe temperature according to claim 2, characterized in that: The support and guide assembly also includes two first roller shafts. The roller bracket is U-shaped. The two first roller shafts are both located in the roller bracket. The two first roller shafts are symmetrically distributed up and down. The two ends of each first roller shaft are respectively installed on both sides of the roller bracket through bearings. The piston rod of the oil cylinder is fixedly connected to the middle position of the bottom of the roller bracket.

5. The device for online monitoring of PE-RT pipe temperature according to claim 1, characterized in that: The reversing roller assembly includes a supporting vertical plate and a second roller shaft. The bottom of the supporting vertical plate is fixed at a position corresponding to the bottom of the cooling water tank. The supporting vertical plate is perpendicular to the bottom of the cooling water tank. One end of the second roller shaft is installed on the supporting vertical plate through a bearing, and the second roller shaft is perpendicular to the supporting vertical plate.

6. The device for online monitoring of PE-RT pipe temperature according to claim 1, characterized in that: There are three lifting support components, which are distributed in a straight line, and the straight line on which the three lifting support components are distributed is perpendicular to the axis of the pipe inlet.

7. The device for online monitoring of PE-RT pipe temperature according to claim 1, characterized in that: The temperature sensor is ring-shaped.

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