Detector for measuring fluctuation change of wall thickness of pipe

Abstract

The utility model relates to a detector for measuring the fluctuation change of the wall thickness of a pipe, which is arranged between a pipe vacuum box and a pipe cooling water tank. The detector comprises a temperature sensor used for measuring the temperature of a pipe, a master control circuit board electrically connected with the temperature sensor, and an alarm electrically connected with the master control circuit board, the temperature sensor detects the temperature of the pipe and transmits the temperature information of the pipe to a master control circuit board MCU, and the alarm is electrically connected with the master control circuit board. The master control circuit board MCU controls the alarm according to temperature information of the temperature sensor, the detector is located on the outer side of the pipe outlet section of the vacuum box, the temperature sensor detects the temperature of a pipe after the pipe is subjected to vacuum cooling forming, and when the difference between the detected temperature value of the pipe and the process set temperature value is large, the alarm gives an alarm. After alarming, whether the machine is abnormal or not can be detected manually, or the traction speed of the traction machine and the speed of a vacuum box circulating water pump are adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe production, in particular to a detector used for measuring fluctuations in pipe wall thickness. Background Art

[0002] After the tube is extruded from the extruder, it enters the vacuum box to eliminate the shaping and pre-cooling. If the extrusion traction speed is slow, the outer surface temperature of the tube is low and the tube wall thickness is large. If the extrusion traction speed is fast, the outer surface temperature of the tube is high and the tube wall thickness is small. Therefore, in order to prevent the tube from becoming larger or smaller, the traction speed of the extruder is particularly important. According to the relationship between the tube wall thickness and the outer surface temperature of the tube, the outer surface temperature of the tube can be measured to obtain the fluctuation of the tube wall thickness. To this end, Chinese patent No. ZL 201821086959.1 discloses an infrared temperature-controlled PVC cooling water ring device, comprising a vacuum water tank, a sizing sleeve is arranged in the vacuum water tank, a cooling water ring is arranged on the outer surface of the sizing sleeve, the cooling water ring is connected to a variable speed water pump, the variable speed water pump is connected to an external water tank, an infrared temperature sensor is arranged on the upper end frame of the sizing sleeve, a traction machine is arranged at the outlet end of the vacuum water tank, the infrared temperature sensor is communicatively connected to a temperature controller, and the temperature controller is communicatively connected to the traction machine and the variable speed water pump respectively; the center temperature of the PVC pipe is directly and remotely detected by the infrared temperature sensor and displayed in real time on an LED temperature display, and at the same time, the speed of the variable speed water pump and the traction speed of the traction machine are adjusted in real time according to the change of the center temperature of the PVC pipe, so as to achieve the purpose of controlling the temperature within the set range, realize automatic processing and adjustment of the pipe wall thickness, improve the production rate, reduce labor intensity, and reduce the production of defective products.

[0003] The upper frame of the sizing sleeve of the vacuum water tank is provided with an infrared temperature sensor, through which the center temperature of the PVC pipe is directly and remotely detected. The pipe is detected on the vacuum water tank, and it is also a remote detection. The detected temperature includes the temperature information of the cooling water in the vacuum tank and the pipe, and its detection degree is inaccurate.

[0004] Therefore, further improvement is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a detector for measuring the fluctuation of pipe wall thickness. By arranging the detector at the connection between the vacuum box and the pipe cooling water tank, it can be understood that the detector is on the outside of the pipe outlet section of the vacuum box, so that the temperature of the pipe after vacuum cooling and forming can be truly detected. As the pipe is pulled, the detector can measure the temperature of each section of the pipe. When the temperature value detected by the pipe is greatly different from the process set temperature value, the alarm will sound an alarm. After the alarm, it can be manually detected whether the machine is in an abnormal state, or the traction rate of the traction machine can be adjusted, and the rate of the circulating water pump of the vacuum box can be adjusted.

[0006] The purpose of the utility model is achieved in this way:

[0007] A detector for measuring fluctuations in pipe wall thickness, the detector is arranged between a pipe vacuum box and a pipe cooling water tank, the detector comprises a temperature sensor for measuring pipe temperature, a main control circuit board electrically connected to the temperature sensor, and an alarm electrically connected to the main control circuit board, the temperature sensor detects the pipe temperature and transmits the pipe temperature information to the main control circuit board MCU, the main control circuit board MCU controls the alarm according to the temperature information of the temperature sensor, the detector is located on the outside of the pipe outlet section of the vacuum box, the temperature sensor detects the pipe temperature after the pipe is vacuum cooled and formed, when the temperature value detected by the pipe differs greatly from the process set temperature value, the alarm sounds an alarm, after which the alarm can be manually detected whether the machine is abnormal, or the traction rate of the traction machine can be adjusted, and the rate of the circulating water pump of the vacuum box can be adjusted.

[0008] The temperature sensor is arranged on the support assembly, and the support assembly is movably arranged on the fixed rod up and down; the temperature sensor moves up and down on the fixed rod with the support assembly to adjust the up and down position between the temperature sensor and the fixed rod and / or adjust the up and down position between the support assembly and the fixed rod, and adjust the up and down position between the temperature sensor and the fixed rod according to the outer diameter of the pipe.

[0009] The temperature sensor is elastically and telescopically arranged on the supporting assembly. When the temperature sensor measures the temperature of the pipe, the temperature sensor makes elastic contact with the outer surface of the pipe. When the pipe comes under the temperature sensor from the outlet section of the vacuum box, to ensure that the temperature sensor is in full contact with the pipe, the temperature sensor is in full contact with the pipe under the action of the elastic member, thereby avoiding contact failure between the temperature sensor and the pipe. Alternatively, the temperature sensor is an infrared temperature sensor, and a non-contact temperature measurement distance is provided between the infrared temperature sensor and the outer surface of the pipe.

[0010] The detector also includes a supporting assembly for supporting the temperature sensor and a fixing rod movably connected to the supporting assembly. The main control circuit board is arranged in the electrical cavity of the electric control box. A wire groove for inserting the first wire is provided between the supporting assembly, the fixing rod and the electric control box. The temperature sensor is electrically connected to the main control circuit board through the first wire to ensure that the detection information of the temperature sensor is transmitted to the main control board MCU.

[0011] The main control circuit board is arranged in the electric control box, and the electric control box is provided with an electrical cavity for accommodating and installing the main control circuit board; the electric control box is provided with an opening for installing a display screen, and a second wire is provided between the display screen and the main control circuit board. The display screen is electrically connected to the main control circuit board through the second wire, and the display screen can display the temperature information detected by the temperature sensor.

[0012] The detector also includes a box body for fixing the temperature sensor, the box body is provided with a detection position, and the lower limit position of the pipe is at the detection position when the measuring temperature is measured; a connecting arm is provided on one side of the box body, and the connecting arm is movably arranged on the fixed rod up and down; the box body and the connecting arm form a supporting assembly for supporting the temperature sensor.

[0013] The box body includes a bottom box and a surface cover. Through holes for inserting the temperature sensor are provided on the corresponding detection positions of the bottom box and the surface cover. A limit piece is provided on the temperature sensor. The outer diameter of the limit piece is larger than the inner diameter of the through hole. The temperature sensor is installed on one side of the through hole by the limit piece to prevent the temperature sensor from detaching to the outside of the through hole.

[0014] The bottom box is provided with a fixed sleeve, the fixed sleeve is provided with a spring, one end of the temperature sensor is inserted into the fixed sleeve, one end of the spring abuts against the bottom wall of the fixed sleeve, and the other end of the spring abuts against the temperature sensor, so that the temperature sensor is elastically arranged on the box body.

[0015] One end of the connecting arm is provided with a movable sleeve which is sleeved on the fixed rod, and an adjustment position for inserting a fastener is provided between the movable sleeve and the fixed rod; when the fastener releases the locking force, the movable sleeve of the connecting arm moves up and down on the fixed rod along the adjustment position, and when the movable sleeve of the connecting arm moves to the corresponding position, the fastener fixes the movable sleeve on the fixed rod.

[0016] The fixing rod is fixedly or detachably mounted on the base.

[0017] The beneficial effects of the utility model are as follows:

[0018] The main control circuit board MCU controls the alarm according to the temperature information of the temperature sensor. The detector is located on the outside of the vacuum box pipe outlet section. Its temperature sensor detects the temperature of the pipe after the pipe is vacuum cooled and formed. When the temperature value detected by the pipe is significantly different from the process set temperature value, the alarm will sound. After the alarm, you can manually check whether the machine is abnormal, or adjust the traction rate of the traction machine, and adjust the rate of the vacuum box circulating water pump.

[0019] The detector is installed between the vacuum box sizing and the water tank cooling, and the surface temperature of the online produced pipes is detected by infrared temperature measuring instrument.

[0020] When the surface temperature of the pipe changes slightly within a certain range, the wall thickness of the pipe is consistent.

[0021] When the surface temperature of the pipe fluctuates greatly, it indicates that the wall thickness of the pipe fluctuates, which is manifested as thinner or thicker wall thickness. At this time, the device alarms to alert the operator and handle the abnormal product.

[0022] The device is suitable for abnormal wall thickness detection of PERT&PPR, PE32 and below small diameter pipes.

[0023] At present, the wall thickness of pipes is detected by ultrasonic method, but the overall cost is too high and users cannot use it as standard equipment. This detector can replace the expensive ultrasonic sensor detection alarm and reduce the cost of use for customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of a detector according to an embodiment of the utility model.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of a detector according to an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figure 1 , Figure 2 A detector for measuring fluctuations in pipe wall thickness, the detector is arranged between a pipe vacuum box and a pipe cooling water tank, the detector comprises a temperature sensor 2 for measuring the temperature of a pipe 1, a main control circuit board 3 electrically connected to the temperature sensor 2, and an alarm electrically connected to the main control circuit board 3, the temperature sensor 2 detects the temperature of the pipe 1 and transmits the temperature information of the pipe 1 to the main control circuit board 3 MCU, and the main control circuit board 3 MCU controls the alarm according to the temperature information of the temperature sensor 2.

[0028] In this embodiment, the alarm is a light alarm or a buzzer alarm.

[0029] The temperature sensor 2 is arranged on the support assembly 4, and the support assembly 4 is movably arranged on the fixed rod 5 up and down; the temperature sensor 2 moves up and down on the fixed rod 5 with the support assembly 4 to adjust the up and down position between the temperature sensor 2 and the fixed rod 5 and / or adjust the up and down position between the support assembly 4 and the fixed rod 5.

[0030] The temperature sensor 2 is elastically and telescopically arranged on the support assembly 4 . When the temperature sensor 2 measures the temperature of the pipe 1 , the temperature sensor 2 is in elastic contact with the outer surface of the pipe 1 .

[0031] Alternatively, the temperature sensor 2 is an infrared temperature sensor, and a non-contact temperature measurement distance is provided between the infrared temperature sensor and the outer surface of the pipe 1 .

[0032] The detector also includes a support assembly 4 for supporting the temperature sensor 2, and a fixing rod 5 movably connected to the support assembly 4. The main control circuit board 3 is arranged in the electrical cavity 7 of the electrical control box 6. A wire groove 19 for inserting the first wire is provided between the support assembly 4, the fixing rod 5 and the electrical control box 6; the temperature sensor 2 is electrically connected to the main control circuit board 3 through the first wire.

[0033] The main control circuit board 3 is arranged in the electric control box 6, and the electric control box 6 is provided with an electrical cavity 7 for accommodating and installing the main control circuit board 3; the electric control box 6 is provided with an opening for installing a display screen 8, and a second wire is provided between the display screen 8 and the main control circuit board 3, and the display screen 8 is electrically connected to the main control circuit board 3 through the second wire.

[0034] In this embodiment, the electrical control box 6 is provided with heat dissipation ventilation holes connected to the electrical cavity 7, and the electrical control box 6 is provided with a speaker hole corresponding to the buzzer alarm, or an alarm indicator light is provided on the top of the electrical control box 6. When the temperature sensor 2 detects that the temperature value of the pipe is abnormal, the alarm sounds an alarm.

[0035] The detector also includes a box body 9 for fixedly installing the temperature sensor 2, and a detection position 10 is provided on the box body 9. The pipe 1 is at the detection position 10 at the lower limit position of the measuring temperature; a connecting arm 14 is provided on one side of the box body 9, and the connecting arm 14 is movably arranged on the fixing rod 5 up and down; the box body 9 and the connecting arm 14 form a supporting assembly 4 for supporting the temperature sensor 2.

[0036] The box body 9 includes a bottom box 11 and a surface cover 12. The bottom box 11 and the surface cover 12 are provided with through holes corresponding to the detection position 10 for inserting the temperature sensor 2. The temperature sensor 2 is provided with a limit piece 13. The outer diameter of the limit piece 13 is larger than the inner diameter of the through hole. The temperature sensor 2 is installed on one side of the through hole by the limit piece 13.

[0037] In this embodiment, the surface cover 12 is fixed to the bottom box 11 by screws.

[0038] In this embodiment, the limiting member 13 may be a rubber ring.

[0039] The bottom box 11 is provided with a fixed sleeve 15, on which a spring 16 is provided. One end of the temperature sensor 2 is inserted into the fixed sleeve 15, one end of the spring 16 abuts against the bottom wall of the fixed sleeve 15, and the other end of the spring 16 abuts against the temperature sensor 2, so that the temperature sensor 2 is elastically and movably arranged on the box body 9.

[0040] In this embodiment, an assembly cavity for installing and accommodating a fixed sleeve 15 is provided on the base box 11. During assembly, the spring 16 is first inserted into the fixed sleeve 15, and then the temperature sensor 2 with a limiting member 13 is inserted into the fixed sleeve 15 and then passed through the through hole of the base box 11. Finally, the surface cover 12 is fixed on the base box 11, so that the temperature sensor 2 is encapsulated between the base box 11 and the surface cover 12.

[0041] A movable sleeve 17 is provided at one end of the connecting arm 14 and is sleeved on the fixed rod 5. An adjustment position for inserting a fastener is provided between the movable sleeve 17 and the fixed rod 5. When the fastener releases the locking force, the movable sleeve 17 of the connecting arm 14 moves up and down on the fixed rod 5 along the adjustment position. When the movable sleeve 17 of the connecting arm 14 moves to the corresponding position, the fastener fixes the movable sleeve 17 on the fixed rod 5.

[0042] In this embodiment, the adjustment position may be an elliptical strip groove, or the adjustment position may be a plurality of fixed adjustment holes arranged vertically.

[0043] The fixing rod 5 is fixedly or detachably mounted on the base 18 .

[0044] In this embodiment, the fixing rod 5 is fixed to the base 18 by welding, or a positioning block positioned on the base 18 is provided on the fixing rod 5, and the positioning block is detachably fixed to the base 18 by screws.

[0045] In this embodiment, a bracket supported on a base 18 is provided at the bottom of the electric control box 6 .

[0046] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A detector for measuring fluctuations in pipe wall thickness, characterized in that: The detector is arranged between a pipe vacuum box and a pipe cooling water tank, and comprises a temperature sensor (2) for measuring the temperature of a pipe (1), a main control circuit board (3) electrically connected to the temperature sensor (2), and an alarm electrically connected to the main control circuit board (3); the temperature sensor (2) detects the temperature of the pipe (1) and transmits the temperature information of the pipe (1) to an MCU of the main control circuit board (3); and the MCU of the main control circuit board (3) controls the alarm according to the temperature information of the temperature sensor (2).

2. The detector for measuring the fluctuation of pipe wall thickness according to claim 1, characterized in that: The temperature sensor (2) is arranged on the support assembly (4), and the support assembly (4) is arranged on the fixed rod (5) so as to be movable up and down; the temperature sensor (2) moves up and down on the fixed rod (5) along with the support assembly (4) to adjust the up and down position between the temperature sensor (2) and the fixed rod (5) and / or adjust the up and down position between the support assembly (4) and the fixed rod (5).

3. The detector for measuring the fluctuation of pipe wall thickness according to claim 1, characterized in that: The temperature sensor (2) is elastically and telescopically arranged on the support assembly (4); when the temperature sensor (2) measures the temperature of the pipe (1), the temperature sensor (2) is in elastic contact with the outer surface of the pipe (1); or, the temperature sensor (2) is an infrared temperature sensor, and a non-contact temperature measurement distance is provided between the infrared temperature sensor and the outer surface of the pipe (1).

4. The detector for measuring the fluctuation of pipe wall thickness according to claim 1, characterized in that: It also includes a support assembly (4) for supporting the temperature sensor (2), and a fixing rod (5) movably connected to the support assembly (4); the main control circuit board (3) is arranged in an electrical cavity (7) of an electrical control box (6); a wire groove (19) for inserting a first wire is provided between the support assembly (4), the fixing rod (5) and the electrical control box (6); and the temperature sensor (2) is electrically connected to the main control circuit board (3) via the first wire.

5. The detector for measuring the fluctuation of pipe wall thickness according to claim 1, characterized in that: The main control circuit board (3) is arranged in an electric control box (6), and the electric control box (6) is provided with an electrical cavity (7) for accommodating and installing the main control circuit board (3); an opening for installing a display screen (8) is provided on the electric control box (6), and a second wire is provided between the display screen (8) and the main control circuit board (3), and the display screen (8) is electrically connected to the main control circuit board (3) via the second wire.

6. The detector for measuring the fluctuation of pipe wall thickness according to claim 1, characterized in that: The invention also comprises a box body (9) for fixing and mounting the temperature sensor (2), wherein a detection position (10) is provided on the box body (9), and the pipe (1) is at the detection position (10) at the lower limit position of the measuring temperature; a connecting arm (14) is provided on one side of the box body (9), and the connecting arm (14) is movably arranged on the fixing rod (5) in an up-and-down manner; and the box body (9) and the connecting arm (14) form a supporting assembly (4) for supporting the temperature sensor (2).

7. The detector for measuring the fluctuation of pipe wall thickness according to claim 6, characterized in that: The box body (9) comprises a bottom box (11) and a surface cover (12). A through hole for inserting the temperature sensor (2) is provided on the bottom box (11) and the surface cover (12) corresponding to the detection position (10). A limiting member (13) is provided on the temperature sensor (2). The outer diameter of the limiting member (13) is larger than the inner diameter of the through hole. The temperature sensor (2) is installed on one side of the through hole by limiting the position of the limiting member (13).

8. The detector for measuring the fluctuation of pipe wall thickness according to claim 6, characterized in that: The bottom box (11) is provided with a fixed sleeve (15), and the fixed sleeve (15) is provided with a spring (16). One end of the temperature sensor (2) is inserted into the fixed sleeve (15), one end of the spring (16) abuts against the inner bottom wall of the fixed sleeve (15), and the other end of the spring (16) abuts against the temperature sensor (2), so that the temperature sensor (2) is elastically movably arranged on the box body (9).

9. The detector for measuring the fluctuation of pipe wall thickness according to claim 6, characterized in that: One end of the connecting arm (14) is provided with a movable sleeve (17) sleeved on the fixed rod (5), and an adjustment position for inserting a fastener is provided between the movable sleeve (17) and the fixed rod (5); when the fastener releases the locking force, the movable sleeve (17) of the connecting arm (14) moves up and down on the fixed rod (5) along the adjustment position, and when the movable sleeve (17) of the connecting arm (14) moves to a corresponding position, the fastener fixes the movable sleeve (17) on the fixed rod (5).

10. The detector for measuring the fluctuation of pipe wall thickness according to claim 6, characterized in that: The fixing rod (5) is fixedly or detachably mounted on the base (18).

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