Tension monitoring device for geogrid sheet

Abstract

The utility model provides a tension monitoring device for a geogrid sheet, which comprises a tension monitoring mechanism and a monitoring control system, and is characterized in that the tension monitoring mechanism comprises a tension roller, a tension roller bracket and a corner signal monitoring device, the tension roller bracket comprises a rotating roller and two swing arms, and two ends of the two swing arms are respectively connected with two ends of the rotating roller and the tension roller. The tension roller is used for guiding a grating sheet output by a traction roller on the transverse stretching equipment; the rotating roller is used for being arranged on a rack at the output end of the transverse stretching equipment and supporting the tension roller to swing. The corner signal monitoring device is used for monitoring the rotation angle of the roller, and the signal output end is connected with the monitoring control system. And the monitoring control system is used for converting the received rotation angle data into the tension data of the grating sheet passing through the tension roller and controlling the output speed of the transverse stretching equipment. The grating sheet tension monitoring device is reasonable in structural design, easy to install, use and maintain, accurate in grating sheet tension monitoring, long in service life and low in manufacturing cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of geosynthetics detection, in particular to a tension monitoring device for geogrid sheets. Background Art

[0002] Geogrids are usually made of special polypropylene and masterbatch as raw materials, and are made by extrusion, punching and stretching. The production equipment includes transverse stretching equipment and longitudinal stretching equipment. After extrusion and punching, the grid sheet enters the transverse stretching equipment, and the sheet is heated by different roller settings; the grid sheet passes through the upper and lower rollers at the terminal of the transverse stretching equipment, and then enters the longitudinal stretching equipment. During the production process, the grid sheet is in a tensioned state. Whether the grid sheet is tight and the degree of tension is usually monitored by the tension monitoring device set at the terminal of the transverse stretching equipment. The existing tension monitoring device usually sets a monitoring roller under the output roller at the terminal of the transverse stretching equipment, and sets a high-precision tension sensor on the monitoring roller for monitoring. The advantage of this tension sensor is accurate monitoring data, and the disadvantage is that it is expensive (about 100,000 yuan), cumbersome installation and debugging, and short long-term service life in high temperature environment (generally, the design operating temperature of the tension sensor does not exceed 85°C, and the actual production environment temperature is about 100-200°C).

[0003] How to design a geogrid sheet tension monitoring device with reasonable structural design, simple installation, use and maintenance, accurate grid sheet tension monitoring, long service life, and especially the ability to significantly reduce construction costs, is a problem that needs to be urgently solved in this field. Utility Model Content

[0004] The utility model provides a geogrid sheet tension monitoring device to solve the above problems in the prior art. The device has reasonable structural design, simple installation, use and maintenance, accurate grid sheet tension monitoring, long service life and low cost.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A geogrid sheet tension monitoring device comprises a tension monitoring mechanism and a monitoring control system, characterized in that the tension monitoring mechanism comprises a tension roller, a tension roller bracket and an angle signal monitoring device, the tension roller bracket comprises a rotating roller and two swing arms, the two ends of the two swing arms are respectively connected to the two ends of the rotating roller and the tension roller, the tension roller is used to guide the grid sheet output by the traction roller on the transverse stretching equipment, the rotating roller is used to be set on the frame at the output end of the transverse stretching equipment and support the swing of the tension roller, the angle signal monitoring device is used to monitor the rotation angle of the rotating roller, the signal output end of the angle signal monitoring device is connected to the monitoring control system, and the monitoring control system is used to convert the rotation angle data output by the angle signal monitoring device into the grid sheet tension data passing through the tension roller.

[0007] Improvement on the above technical solution: an extension shaft is arranged on one end of the rotating roller, and the end of the extension shaft extends out from the next door of the production workshop where the transverse stretching equipment is located; the corner signal monitoring device comprises a proximity switch fixing plate, a sensor plate and a support frame; the sensor plate is arranged on the end of the extension shaft; a plurality of proximity switches are arranged on the proximity switch fixing plate; the proximity switch fixing plate is arranged on the support frame; a side of the proximity switch fixing plate where the proximity switches are arranged faces the outer side of the sensor plate; the sensor plate rotates with the rotating roller and blocks a certain number of proximity switches on the proximity switch fixing plate; signal lines respectively arranged on one end of each proximity switch are connected to the monitoring and control system for transmitting signals of the number of proximity switches blocked by the sensor plate to the monitoring and control system; the monitoring and control system controls the output speed of the grid sheet of the transverse stretching equipment.

[0008] The above technical solution is further improved: mounting holes are arranged in an arc on the proximity switch fixing plate, the proximity switch is a magnetic induction switch, an external thread is arranged on the outer side surface of the magnetic induction switch, the magnetic induction switch is inserted into the mounting hole, and the two sides are fixedly connected with fixing nuts and gaskets, the front end of the magnetic induction switch faces the induction board, and the signal line is led out from the rear end of the magnetic induction switch, and the induction board is a metal plate or a non-metal plate containing a magnet.

[0009] The above technical solution is further improved as follows: a counterweight is provided at each end of the tension roller.

[0010] The above technical solution is further improved: the support frame includes a triangular base, a supporting straight rod and two diagonal support rods, the proximity switch fixing plate and the sensing plate are both fan-shaped, the upper end of the supporting straight rod is connected to a straight side of the proximity switch fixing plate by a bolt, and one corner of the sensing plate is connected to one end of the extension shaft by a hexagon socket bolt.

[0011] The above technical solution is further improved as follows: the monitoring and control system includes a control display screen, and an emergency stop button is provided on the control display screen.

[0012] The above technical solution is further improved: the tension roller is parallel to the rotating roller, the height of the tension roller is lower than the height of the rotating roller, and the angle between the center line of the swing arm and the vertical line ranges from 10° to 70°.

[0013] The above technical solution is further improved: the monitoring and control system includes an alarm, and when the angle between the center line of the swing arm and the vertical line is less than 10° or the angle between the center line of the swing arm and the vertical line is greater than 70°, the monitoring and control system controls the alarm to sound an alarm.

[0014] The advantages and positive effects of the utility model are:

[0015] 1. The utility model has a reasonable structural design and is easy to install, use and maintain;

[0016] 2. The utility model adopts proximity switches for monitoring, which reduces the cost by more than 90% compared with the use of high-precision tension sensors (the manufacturing cost of the entire tension monitoring device is about 5,000 yuan), and has a long service life.

[0017] 3. The utility model sets the angle signal monitoring device including the proximity switch next to the production workshop where the transverse stretching equipment is located, which is not affected by the high temperature of the workshop, and is conducive to extending the service life of electrical components such as the proximity switch;

[0018] 4. The utility model provides a counterweight at each end of the tension roller. By selecting weights of different weights, the tension control range is wide, and it can be suitable for monitoring grid sheets with different tension ranges.

[0019] 5. The utility model has a high degree of automation and reliable operation. When an abnormal situation occurs in the equipment, an alarm can be sounded, which can effectively improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereoscopic diagram of a rotation angle signal monitoring device in a tension monitoring device for geogrid sheets of the utility model;

[0021] Figure 2 This is an assembly exploded view of a rotation angle signal monitoring device in a tension monitoring device for geogrid sheets of the utility model;

[0022] Figure 3 It is a stereoscopic diagram of a tension monitoring device for geogrid sheets of the utility model;

[0023] Figure 4The utility model is a schematic diagram of a roller rotation angle monitoring process in a tension monitoring device for geogrid sheets.

[0024] In the figure, 1. extension shaft; 1.1. screw hole; 2. proximity switch fixing plate; 2.1. mounting hole; 2.2. fixing screw hole; 3. proximity switch; 3.1. signal line; 4. induction plate; 4.1. fixing hole; 5. fixing nut gasket; 6. support frame; 7. hexagonal bolt; 8. hexagon socket bolt; 9. rotating roller; 10. tension roller; 11. grille sheet; 12. swing arm; 13. bearing with seat (UCF-208); 14. counterweight; 15. bearing with seat (UCP-208); 16. traction roller. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below with reference to the accompanying drawings:

[0026] See also Figure 1-Figure 4 The utility model discloses an embodiment of a tension monitoring device for geogrid sheets, comprising a tension monitoring mechanism and a monitoring control system, wherein the tension monitoring mechanism comprises a tension roller 10, a tension roller bracket and an angle signal monitoring device, wherein the tension roller bracket comprises a rotating roller 9 and two swing arms 12, and the two ends of the two swing arms 12 are respectively connected to the rotating roller 9 and the two ends of the tension roller 10. The tension roller 10 is used to guide the grid sheet 11 output by the traction roller 16 on the transverse stretching device, and the rotating roller 9 is used to be arranged on the frame at the output end of the transverse stretching device and support the swing of the tension roller 10; the angle signal monitoring device is used to monitor the rotation angle of the rotating roller 9; the signal output end of the angle signal monitoring device is connected to the monitoring control system, and the monitoring control system is used to convert the rotation angle data output by the angle signal monitoring device into the tension data of the grid sheet 11 passing through the tension roller 10.

[0027] Furthermore, an extension shaft 1 is arranged on one end of the above-mentioned roller 9, and the end of the extension shaft 1 extends out from the production workshop next to the transverse stretching equipment. The corner signal monitoring device includes a proximity switch fixing plate 2, a sensor plate 4 and a support frame 6. The sensor plate 4 is arranged on the end of the extension shaft 1. A plurality of proximity switches 3 are arranged on the proximity switch fixing plate 2, and the proximity switch fixing plate 2 is arranged on the support frame 6. The side of the proximity switch fixing plate 2 on which the proximity switches 3 are arranged faces the outer side of the sensor plate 4. The sensor plate 4 rotates with the roller and blocks a certain number of proximity switches 3 on the proximity switch fixing plate 2. The signal lines 3.1 respectively arranged at one end of each proximity switch 3 are connected to the monitoring and control system, and are used to transmit the number signal of the proximity switch 3 blocked by the sensor plate 4 to the monitoring and control system. The monitoring and control system controls the output speed of the grid sheet of the transverse stretching equipment.

[0028] Furthermore, the proximity switch fixing plate 2 is provided with mounting holes 2.1 arranged in an arc line, the proximity switch 3 is a magnetic induction switch, an outer surface of the magnetic induction switch is provided with an external thread, the magnetic induction switch is inserted into the mounting hole 2.1, and the two sides are fixedly connected with fixing nuts and gaskets 5. The front end of the magnetic induction switch faces the induction plate 4, and the rear end of the magnetic induction switch leads to a signal line 3.1. The proximity switch 3 can also be a photoelectric sensor or a Hall effect sensor.

[0029] Furthermore, a counterweight 14 is provided at each end of the tension roller 10. By selecting counterweights 14 of different weights, the tension control range is wide, and it can be suitable for monitoring grid sheets 11 with different tension ranges.

[0030] Specifically, the support frame 6 includes a triangular base, a supporting straight rod and two diagonal supporting rods, and the lower ends of the supporting straight rod and the two diagonal supporting rods are respectively connected to the triangular base. The proximity switch fixing plate 2 and the induction plate 4 are both fan-shaped, and two fixing screw holes 2.2 are set on the straight edge of the proximity switch fixing plate 2. The upper end of the supporting straight rod is connected to the proximity switch fixing plate 2 through two hexagon socket bolts 8. A screw hole 1.1 is set on the end face of the extension shaft 1, and a fixing hole 4.1 is set on a corner of the induction plate 4. The induction plate 4 is fixed to the end of the extension shaft 1 with a hexagon socket bolt 7.

[0031] Furthermore, the monitoring and control system includes a control display screen, and an emergency stop button is provided on the control display screen.

[0032] Furthermore, the monitoring control system includes an alarm, and when the sensing plate 4 does not block any proximity switch 3 on the proximity switch fixing plate 2 or the sensing plate 4 blocks all proximity switches on the proximity switch fixing plate 2, the monitoring control system controls the alarm to sound an alarm. Preferably, the monitoring control system adopts a PLC.

[0033] During installation, the tension roller 10 is arranged parallel to the rotating roller 9, the height of the tension roller 10 is lower than the height of the rotating roller 9, and the angle between the center line of the two swing arms 12 and the vertical line is in the range of 10°-70°. The two swing arms 12 are respectively connected to the two ends of the tension roller 10 by a seat bearing (UCF-208) 13, so that the tension roller 10 can be rotated by the seat bearing (UCF-208) 13, and can also swing with the two swing arms 12. The seat bearings (UCP-208) 15 are arranged at both ends of the rotating roller 9 and installed on the frame at the output end of the transverse stretching equipment, so that the rotating roller 9 and the traction roller 16 on the terminal of the output end of the transverse stretching equipment are parallel to each other, and the height is basically the same, and the rotating roller 9 can be rotated by the seat bearing (UCP-208) 15.

[0034] During the manufacturing of the utility model, five proximity switches 3 are arranged on the proximity switch fixing plate 2 to monitor the position information and tension data of the tension roller 10 in real time. More detection positions (proximity switches 3) can be added as needed to further improve the monitoring accuracy. Figure 4 , to provide accurate data support for the monitoring and control system, according to the W1-W2 running track, the length of the tension roller swing radius R ( Figure 4 O is the swing center) and the weight of the counterweight 14, combined with the concept of mechanics, it can be calculated that the force value of the tension roller 10 acting on the grid sheet 11 is different during the up and down swing process. From the actual situation, five states of the induction plate 4 blocking 1-5 proximity switches 3 are calculated, and the corresponding tension roller 10 displays different force values ​​when it is in five positions. The utility model sets a counterweight 14 at each end of the tension roller. By selecting counterweights 14 of different weights, the tension control range is large, which can be suitable for monitoring grid sheets 11 with different tension ranges.

[0035] The tension roller 10 is parallel to the rotating roller 9, and the height of the tension roller 10 is lower than the height of the rotating roller 9. Preferably, the angle between the center line of the swing arm 12 and the vertical line is in the range of 10°-70°.

[0036] The monitoring and control system includes an alarm. When the angle between the center line of the swing arm 12 and the vertical line is less than 10° or the angle between the center line of the swing arm 12 and the vertical line is greater than 70°, the monitoring and control system controls the alarm to sound, reminding the user to stop the machine, check whether the equipment is faulty, or replace the counterweight 14 with a suitable weight.

[0037] During the production and monitoring process of geogrid sheets, the grid sheet 11 is output from the traction roller 16 at the output terminal of the transverse stretching device, and successively clings to the bottom of the rotating roller 9 and the tension roller 10, and then enters the longitudinal stretching device. Under the action of the tension of the grid sheet 11, the tension roller 10 swings with the two swing arms 12. The tension monitoring device of the geogrid sheet of the utility model can monitor the position information of the tension roller 10 in real time through the proximity switch 3, and monitor the tension data of the grid sheet 11.

[0038] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A geogrid sheet tension monitoring device, comprising a tension monitoring mechanism and a monitoring control system, characterized in that: The tension monitoring mechanism includes a tension roller, a tension roller bracket and an angle signal monitoring device. The tension roller bracket includes a rotating roller and two swing arms. The two ends of the two swing arms are respectively connected to the two ends of the rotating roller and the tension roller. The tension roller is used to guide the grid sheet output by the traction roller on the transverse stretching device. The rotating roller is used to be set on the frame at the output end of the transverse stretching device and support the swing of the tension roller. The angle signal monitoring device is used to monitor the rotation angle of the rotating roller. The signal output end of the angle signal monitoring device is connected to the monitoring control system. The monitoring control system is used to convert the rotation angle data received from the output of the angle signal monitoring device into the grid sheet tension data passing through the tension roller.

2. The geogrid sheet tension monitoring device according to claim 1, characterized in that: An extension shaft is arranged on one end of the rotating roller, and the end of the extension shaft extends out from the adjacent production workshop where the transverse stretching equipment is located. The angle signal monitoring device includes a proximity switch fixing plate, a sensor plate and a support frame. The sensor plate is arranged on the end of the extension shaft. A plurality of proximity switches are arranged on the proximity switch fixing plate. The proximity switch fixing plate is arranged on the support frame. The side of the proximity switch fixing plate where the proximity switches are arranged faces the outer side of the sensor plate. The sensor plate rotates with the rotating roller and blocks a certain number of proximity switches on the proximity switch fixing plate. The signal lines respectively arranged at one end of each of the proximity switches are connected to the monitoring and control system for transmitting the number signal of the proximity switch blocked by the sensor plate to the monitoring and control system. The monitoring and control system controls the output speed of the grid sheet of the transverse stretching equipment.

3. The geogrid sheet tension monitoring device according to claim 2, characterized in that: The proximity switch fixing plate is provided with mounting holes arranged in an arc line. The proximity switch is a magnetic induction switch. An external thread is provided on the outer side surface of the magnetic induction switch. The magnetic induction switch is inserted into the mounting hole, and both sides are fixedly connected with fixing nuts and gaskets. The front end of the magnetic induction switch faces the induction board, and the signal line is led out from the rear end of the magnetic induction switch. The induction board is a metal plate or a non-metal plate containing a magnet.

4. The geogrid sheet tension monitoring device according to any one of claims 1 to 3, characterized in that: A counterweight is arranged at each end of the tension roller.

5. The geogrid sheet tension monitoring device according to claim 2 or 3, characterized in that: The support frame includes a triangular base, a supporting straight rod and two diagonal support rods. The proximity switch fixing plate and the sensing plate are both fan-shaped. The upper end of the supporting straight rod is connected to a straight side of the proximity switch fixing plate by a bolt, and one corner of the sensing plate is connected to one end of the extension shaft by a hexagon socket bolt.

6. The geogrid sheet tension monitoring device according to any one of claims 1 to 3, characterized in that: The monitoring and control system comprises a control display screen, on which an emergency stop button is arranged.

7. The geogrid sheet tension monitoring device according to claim 4, characterized in that The monitoring and control system comprises a control display screen, on which an emergency stop button is arranged.

8. The geogrid sheet tension monitoring device according to any one of claims 1 to 3, characterized in that: The tension roller is parallel to the rotating roller, the height of the tension roller is lower than the rotating roller, and the angle between the center line of the swing arm and the vertical line ranges from 10° to 70°.

9. The geogrid sheet tension monitoring device according to claim 7, characterized in that: The tension roller is parallel to the rotating roller, the height of the tension roller is lower than the rotating roller, and the angle between the center line of the swing arm and the vertical line ranges from 10° to 70°.

10. The geogrid sheet tension monitoring device according to any one of claims 1 to 3, characterized in that: The monitoring and control system includes an alarm. When the angle between the center line of the swing arm and the vertical line is less than 10° or the angle between the center line of the swing arm and the vertical line is greater than 70°, the monitoring and control system controls the alarm to sound an alarm.

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