CN211919982U - Active conveyer belt of gyro wheel is indulged and is torn protection device - Google Patents

Abstract

The utility model discloses an active conveyer belt of gyro wheel indulges and tears protection device. The device includes the truss, the gyro wheel formula that initial pressure was preset in the shelf location measures the array, gyro wheel formula measures the array and includes a plurality of gyro wheel formula measuring unit, gyro wheel formula measuring unit is arranged along the direction perpendicular with conveyer belt direction of delivery and is installed on the truss, the truss is profile modeling arc structure, gyro wheel formula measuring unit includes gyro wheel mechanism and forced induction mechanism, the gyro wheel of gyro wheel mechanism can rotate under the drive of conveyer belt, forced induction mechanism is used for surveying and exports gyro wheel formula measuring unit's pressure value, when the conveyer belt is indulged and is torn the fracture, 1 of fracture department, 2, 3 or a plurality of pressure values of surveying gyro wheel formula measuring unit are less than original initial pressure value, thereby the initial pressure of gyro wheel formula measurement array loses the uniformity. The utility model overcomes detect among the prior art and indulge the detection difficult point of tearing the trouble, can realize indulging the detection of tearing the trouble to narrow crack effectively.

Description

Active conveyer belt of gyro wheel is indulged and is torn protection device

Technical Field

The utility model belongs to the technical field of automated inspection technique and safety protection, a tear seam measuring device is indulged to the conveyer belt is related to and the conveyer belt is indulged and is torn protection device, especially relates to a indulge the conveyer belt that the detection effect that tears small fissured is obvious to the conveyer belt and indulge and tear protection device.

Background

Modern mining, smelting, power generation, bulk cargo wharf and other occasions largely use conveyer belt conveyors. The conveyer belt conveyer is even provided with a conveyer belt longitudinal tearing fault. Although the frequency of failures is not high, the resulting losses are generally large and production can be delayed. In order to overcome the influence caused by the fault, a conveyor belt longitudinal tearing protection device is developed by a plurality of scientific research institutions and production enterprises in China.

From the utility model patent and the utility model patent that have disclosed at present, the protection device detection method is indulged to current conveyer belt has following five kinds generally:

the first method is a blocking method, wherein a longitudinally torn surface is blocked and hung, and a travel switch with high string pulling sensitivity senses the longitudinally torn surface of the conveyer belt. The method is ineffective in detecting micro cracks without wadding hanging and short hair side hanging.

The second method is a 'slag dropping method', which is divided into an 'upper slag receiving' form and a 'lower slag blocking' form, wherein the upper slag receiving is connected to a longitudinal tearing opening through a 'slag receiving disc' below a conveyer belt to drop slag, so that a rotating shaft at the end part of the slag receiving disc is caused to rotate, and a microswitch is triggered to sense the longitudinal tearing damage of the conveyer belt; the lower slag blocking is to block the falling slag falling on the return belt through a blocking plate arranged above the lower return belt, so that a rotating shaft at the end part of the blocking plate is rotated, and a microswitch is triggered to sense the longitudinal tearing damage. The method needs enough slag to drop to detect the fault, namely the longitudinal tearing opening needs to be large enough to drop enough slag.

The third method is embedding method, and the 'embedding' means that steel wires are used, namely, the conveying belt adopts a steel rope core conveying belt. The inductance type sensor is used for judging whether the embedded steel wire is separated from the uniform distribution state such as 'broken wire', 'thin seam' and the like, so as to judge whether the longitudinal tearing damage occurs to the conveying belt. The method has the main problems that because the sensitivity of the longitudinal arrangement of the steel wires to the tiny cracks is not high, especially when the tiny cracks occur on the conveyer belt, the steel wires in the conveyer belt body are almost at the original position, and the proximity switch can not act as long as only one steel wire is arranged in the measurement range of the proximity switch, the small cracks can not be detected unless the conveyer belt has large cracks in a window opening mode; the detection is indirect measurement, and the false detection rate is high; steel wire conveyor belts are costly and easily damaged.

The fourth method is a carrier roller detection method in which a carrier roller is brought into contact with a conveyor belt and changes in physical quantities of the conveyor belt are detected to determine whether longitudinal tearing or not occurs. The carrier roller of the conveying belt is generally divided into three sections which are in linear contact, and arc sections at two sides are not in contact. Two sections of missing inspection are formed inevitably; although the belt rollers are in contact, the method is difficult to 'extract' the effect caused by the characteristics of longitudinal tearing and transfer the effect out of the carrier roller.

The fifth is a photoelectric sensing conveyor belt longitudinal tear damage represented by laser. By taking a laser detection device as an example, laser beams are continuously irradiated to the back of the conveying belt, and if longitudinal tearing damage occurs, discontinuous 'break points' appear in laser lines, so that the longitudinal tearing damage can be detected. The mode is the only mode capable of detecting the tiny longitudinal tearing damage in the former five modes, but the photoelectric sensor has common diseases, is easily influenced by dust and has higher cost.

In summary, the detection of the longitudinal tearing seam, particularly the detection of the narrow seam, is a difficult point for detection, and if the detection problem of the longitudinal tearing seam and the narrow seam can be well solved, the detection of other medium and large seams can be easily solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough that indulges and tear and decrease the detection, provided an active conveyer belt of gyro wheel indulges and tears and decrease measuring device. Dozens of measuring rollers are arranged on a truss on the back surface of the conveying belt, each roller contacts the conveying belt when being arranged, the consistency of initial pressure is adjusted, the rollers roll along with the movement of the conveying belt, and a pressure sensor is arranged below a roller bracket. Whether the longitudinal tearing damage fault occurs to the conveying belt is judged by judging the pressure difference between the adjacent sensors, and when the fault information occurs, the protection device immediately performs protection operation.

The utility model discloses realize that the technical scheme that above-mentioned purpose adopted is:

a roller active type conveyor belt longitudinal tearing protection device comprises a truss, wherein a roller type measuring array with initial pressure preset is installed on the truss and comprises a plurality of roller type measuring units, the roller type measuring units are arranged and installed on the truss along the direction perpendicular to the conveying direction of a conveyor belt, the truss is of an arc structure, the arc structure is designed according to the lower convex curved surface profile modeling of the conveyor belt, each roller type measuring unit comprises a roller mechanism and a pressure sensing mechanism, each roller mechanism comprises a roller, the roller is abutted against the conveyor belt and can rotate under the driving of the conveyor belt, the pressure sensing mechanism is connected with the roller mechanism and used for detecting and outputting the pressure value of the roller type measuring unit, when the conveyor belt is longitudinally torn and broken, the pressure values of 1, 2, 3 or more detection roller type measuring units at the broken part are lower than the original initial pressure value, so that the initial pressure of the roller-type measurement array is inconsistent.

Furthermore, the roller type measuring array at least comprises 2 rows of roller type measuring units, and the roller type measuring units of adjacent rows are installed in a butt joint mode.

Furthermore, the device also comprises an initial pressure adjusting mechanism, wherein the initial pressure adjusting mechanism comprises an adjusting bolt and a supporting spring, a supporting platform is arranged below the two ends of the truss, the adjusting bolt passes through the two ends of the truss and then is installed on the supporting platform, and the supporting spring is arranged between the end part of the truss and the supporting platform.

Furthermore, the roller mechanism comprises a roller and a shaft bracket, the shaft bracket is provided with a roller shaft, the roller is arranged on the roller shaft, a pressing plate is fixedly arranged below the shaft bracket, the truss is provided with a limiting mechanism, two ends of the pressing plate are matched with the limiting mechanism, so that the roller type measuring unit has a displacement which can move longitudinally relative to the installation surface of the roller type measuring unit, and the lower part of the pressing plate is connected with the pressure sensing mechanism.

Further, clamp plate below fixed mounting has the sensor storehouse, the upper wall in sensor storehouse is equipped with the pressurization arch, the activity cover is equipped with in the sensor storehouse forced induction mechanism, forced induction mechanism including can with the pressure sensor of the protruding contact of pressurization, the pressure that the pressurization arch got off for the follow gyro wheel transmission adds the impetus on the pressure sensor, the spring support plate that is used for loading initial pressure is installed to pressure sensor's below.

Furthermore, the pressure sensing mechanism further comprises a sensor mounting box, the sensor mounting box comprises a shell and an upper cover plate, an upper cover plate hole is formed in the upper cover plate, the pressure sensor is arranged in the sensor mounting box, the spring support plate is fixedly mounted below the sensor mounting box, a longitudinally extending waist-shaped hole is formed in the side wall of the shell, a positioning pin is arranged on the side wall of the sensor mounting box, and the positioning pin is installed in the waist-shaped hole in a matched mode, so that the sensor mounting box and the sensor bin can move relatively.

Furthermore, grooves are formed in two ends of the pressing plate, limiting rods penetrate through the grooves in a movable mode, the lower ends of the limiting rods are fixed on the truss, and top end limiting parts with the size larger than the grooves are installed at the upper ends of the limiting rods.

Furthermore, the roller is provided with a rim made of nitrile rubber, the diameter of the roller is 40-60 mm, and the thickness of the rim of the roller is 6-8 mm.

The utility model has the advantages as follows:

the utility model discloses an active conveyer belt of gyro wheel indulges and tears protection device has overcome among the prior art and has detected and indulge the detection difficult point that tears the trouble, can realize indulging the detection that tears the trouble to narrow crack effectively, the utility model discloses a device and method are accurate reliable, and detection efficiency is high.

Drawings

FIG. 1 is a schematic view of a conveyor belt in normal cross-section;

FIG. 2 is a cross-sectional schematic view of a conveyor belt experiencing a small crack failure;

FIG. 3 is a schematic side view of a roller active conveyor belt longitudinal tear protection device;

FIG. 4 is a top view of a roller active conveyor belt longitudinal tear guard;

FIG. 5 is a front view of the roller-type measuring cell;

FIG. 6 is a side view of the roller-type measuring cell;

FIG. 7 is a top view of the roller-type measuring cell;

FIG. 8 is a front view of the pressure sensing mechanism;

FIG. 9 is a side view of the pressure sensing mechanism;

FIG. 10 is a top view of the pressure sensing mechanism;

FIG. 11 is an initial pressure equalization line for a belt without load;

FIG. 12 is an initial pressure equalization line for delivering a load;

FIG. 13 is a longitudinal tear fault pressure mean line with a narrow crack facing a sensor;

FIG. 14 is a longitudinal tear failure pressure equalization line where a narrow crack occurs between two sensors.

The labels in the figure are: 1. a conveyor belt; 2. material preparation; 3. cracking; 4. a truss; 5. a roller type measuring unit; 6. a support table; 7. a support spring; 8. a roller; 9. a hub; 10. a snap ring; 11. a roller shaft; 12. a pedestal; 13. a pressure sensor; 14. a pressing projection; 15. a sensor bin; 16. pressing a plate; 17. a stop screw; 18. a sensor box is provided with a calibration port; 19. an outlet; 20. a rear positioning hole; 21. a housing; 22. a front positioning hole; 23. installing an alignment mark; 24. leading out wires from the sensor box; 25. a spring carrier plate; 26. an upper cover plate hole; 27. an upper cover plate; 28. a metal positioning plate; 29. a metal lower supporting plate; 30. and a cushion rubber pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The active conveyer belt of gyro wheel of this embodiment is indulged and is torn protection device and be used for the detection of conveyer belt indulge tear seam, and the state that conveyer belt 1 normally carried material 2 is shown in fig. 1, and the fault state that the conveyer belt appears crack 3 is shown in fig. 2. The structure of the roller active type conveyor belt longitudinal tearing protection device is shown in figures 3-4, and comprises a truss 4, a roller type measuring array with preset initial pressure is installed on the truss 4, the roller type measuring array comprises a plurality of roller type measuring units 5, the roller type measuring units 5 are arranged and installed on the truss 4 along the direction vertical to the conveying direction of the conveyor belt, the truss 4 is of an arc structure, the arc structure is designed according to the lower convex curved surface profile of the conveyor belt, the roller type measuring unit 5 comprises a roller mechanism and a pressure sensing mechanism, the roller mechanism comprises a roller 8, the roller 8 is abutted against the conveyor belt and can rotate under the driving of the conveyor belt, the pressure sensing mechanism is connected with the roller mechanism and is used for detecting and outputting the pressure value of the roller type measuring unit 5, when the conveyor belt is longitudinally torn and broken, the pressure values of 1, 2, 3 or more detecting roller type measuring units 5 at the broken part are lower than the original initial, so that the initial pressure of the roller-type measurement array is inconsistent. Each measuring roller is tightly attached to the lower surface of the conveying belt when the truss is installed, certain initial pressure is added, the rollers rotate when the conveying belt moves, each time longitudinal tearing seams appear on the conveying belt, the output pressure values of a plurality of measuring units at the seams are reduced, the output variable of a pressure sensor in each measuring unit is processed into input quantity suitable for a PLC through a transmitting circuit, fault signals of the narrow longitudinal tearing seams of the conveying belt screened out are processed through a PLC program, and an alarm and a conveying belt operation stop are sent.

The installation surface of the copying truss is as close as possible to the curved surface formed on the reverse side of the conveying belt at the installation position, so that the truss needs to be measured on site aiming at the installation position below a certain conveying belt and is produced in a single piece. Due to the requirements of large bearing pressure and measurement accuracy of the truss, the requirement on the rigidity of the truss is high.

The roller type measuring array at least comprises 2 rows of roller type measuring units 5, and the roller type measuring units 5 in adjacent rows are installed in a butt joint mode. In this embodiment, two rows of roller-type measuring units 5 are provided, as shown in fig. 4, and the two rows of roller-type measuring units are installed in a manner of "butt joint" to ensure that the working section of the conveyor belt is fully covered.

As shown in fig. 3, in the present embodiment, an initial pressure adjusting mechanism is designed for adjusting the initial pressure, the initial pressure adjusting mechanism includes an adjusting bolt and a supporting spring 7, a supporting platform 6 is disposed below both ends of the truss 4, the adjusting bolt is installed on the supporting platform 6 after passing through both ends of the truss 4, and the supporting spring 7 is disposed between the end of the truss 4 and the supporting platform 6. The up-and-down adjusting stroke of the supporting tables at the two sides is about 0-150 mm. The supporting platform lifts the truss through 4 pairs of supporting springs, and certain perpendicularity of the truss and the running direction of the conveying belt is guaranteed when the truss is installed.

As shown in fig. 5-7, a preferred structure of the roller mechanism in this embodiment is a preferred structure of the roller mechanism in this embodiment, the roller mechanism includes a roller 8 and a shaft bracket 12, a roller shaft 11 is installed on the shaft bracket 12, the roller 8 is installed on the roller shaft 11, a pressing plate 16 is fixedly installed below the shaft bracket 12, a limiting mechanism is installed on the truss 4, and two ends of the pressing plate 16 are matched with the limiting mechanism, so that the roller type measuring unit 5 has a displacement amount capable of moving longitudinally relative to an installation surface thereof. The pressure sensing mechanism is connected below the pressure plate 16. A sensor bin 15 is fixedly arranged below the pressure plate 16, and the sensor bin 15 comprises a stop screw 17, a sensor box mounting calibration port 18 and a wire outlet 19. The upper wall of sensor storehouse 15 is equipped with pressurization arch 14, and the activity cover is equipped with in the sensor storehouse 15 pressure sensing mechanism, pressure sensing mechanism including can with the pressure sensor 13 of the protruding 14 contact of pressurization, the protruding 14 impetus on adding pressure sensor 13 for the pressure that transfers down from gyro wheel 8 that pressurizes, the spring support plate 25 that is used for loading initial pressure is installed to pressure sensor 13's below. The spring-loaded plate 25 acts to load the initial pressure of each measuring cell, which is actually the respective force exerted on the back of the conveyor belt. If the conveyer belt appears narrow crack and indulges the trouble of tearing, can appear 1 ~ 2 measuring unit's the great reduction of effort, protection device will judge with this that the trouble appears, and the device will react immediately.

In this embodiment, the rim of the roller is made of wear-resistant nitrile rubber, and the hub 9 is provided with a small deep groove ball bearing with end covers at two sides. The roller cannot be too small, so that the rotating speed of the roller is too high, and the roller is not beneficial to long-term work; too small deep groove ball bearings cannot be matched; the roller cannot be too large, because the diameter of the roller is proportional to the thickness of the rim of the roller, the thickness of the large rim of the roller is large, and the sensitivity of measuring the longitudinal tearing narrow cracks is reduced due to the large thickness of the rim; too small a rim thickness can reduce the roller load capacity. Therefore, the diameter of the roller is 40-60 mm and the thickness of the rim of the roller is 6-8 mm.

In this embodiment, the roller shaft is designed to fit a selected deep groove ball bearing. The wheel shaft and the fastener nut side are provided with a snap ring 10 for preventing looseness. The positions of the axle matched with the two bearing holes on the axle frame are tapered to ensure the installation precision and the matching requirement of the axle.

In this embodiment, the axle bracket is one of the key components for ensuring the overall rigidity of the roller. Can be made of cold-rolled steel plate and is surface-galvanized. Reinforcing ribs are stamped on two sides of the shaft bracket to increase rigidity. The axis formed by the two bearing holes on the shaft bracket ensures certain levelness so as to ensure the position precision of the roller. The machining precision of the two bearing holes on the shaft bracket meets the precision requirement of wheel shaft installation.

In the present embodiment, the pressure plate is a member to which the measurement unit main body is attached. The measuring unit main body moves in the vertical direction, and is not pressed by the nut, and the nut only plays a limiting role. The bending moment on the pressure plate is not so great that the steel plate from which the pressure plate is made is not necessarily too thick, but not too thin, which would make the main body of the measuring unit unstable. The thickness of the pressing plate can be 3-5 mm. The working principle of the pressing plate is that the openings at the two ends of the pressing plate and the polished rod part of the mounting screw are used for fixing the roller measuring unit under the guiding action and the nut limiting action. Because the pressure plate has a guiding function, the dimensional tolerance of the openings at the two ends of the pressure plate has certain requirements, and free tolerance can not be adopted.

In this embodiment, the sensor cartridge is configured to accommodate a sensor mounting cartridge. The sensor chamber mainly comprises a chamber and a pressurizing bulge. The bin is punched by a cold-rolled steel plate and is subjected to surface galvanizing treatment. One end baffle and one end opening, the opening side is a channel for installing the sensor box, and the baffle side is a sensor box in-place stop point. The pressing protrusion is a point of application of the pressure transmitted from the roller to the sensor. The sensor cabin can be connected with the shaft bracket and the pressing plate by resistance welding.

The preferable setting structure of the pressure sensor 13 in this embodiment is shown in fig. 8-10, the pressure sensing mechanism further includes a sensor mounting box, the sensor mounting box is provided with a rear positioning hole 20, a mounting alignment mark 23, and a sensor box outlet 24, the sensor mounting box includes a housing 21 and an upper cover plate 27, the upper cover plate 27 is provided with an upper cover plate hole 26, the pressure sensor 13 is disposed in the sensor mounting box, and the sensor mounting box is further provided with a metal positioning plate 28, a metal lower supporting plate 29, and a cushion rubber pad 30. The spring carrier plate 25 is fixedly mounted below the sensor mounting box, a longitudinally extending waist-shaped hole is formed in the side wall of the shell 21, and a positioning pin is arranged on the side wall of the sensor mounting box and is mounted in the waist-shaped hole in a matching manner, so that the sensor mounting box and the sensor cabin 15 have a displacement capable of moving relatively. The sensor measures the initial pressure value and changes the initial pressure value into electric quantity, and the electric quantity value is modulated into a range which can be accepted by the next-stage controller through the transmitter and is processed by the controller.

In this embodiment, the sensor mounting box is used for installing and fixing the sensor in a designed container to form a sensor whole body, so that the measurement, output and mounting work is facilitated. Wherein the core component pressure sensor 13 is pressed against the load cell with T104. The selection of the sensor is mainly determined according to the measurement range, precision and stability of the sensor, whether the sensor is standardized or not, input/output signals (matched transmitters), convenience in connection of an upper computer and a lower computer, installation size and the like. The sensor selected is therefore pressed against the load cell for normalized T104. The measuring range is 0-100N, and the transmitter outputs 4-20 mA; the diameter d of the sensor is 12.85mm, and the height h is approximately equal to 4 mm.

The protection device has the advantages that the working environment is severe, the protection device works under high load for a long time, and real-time monitoring is realized, so that the controller is required to work stably and reliably and has strong anti-interference capability; since the device generally has tens of measuring units, the controller is required to have more input ends and stronger processing capacity. Therefore, the controller in this embodiment selects a PLC with excellent performance as the controller. For convenience of explanation, the present example takes a siemens S7200 SMART S type PLC controller satisfying the above requirements as an example, and one controller can access at most 49 analog input points. If 84 input points exist, two PLCs can meet the requirement of the number of the input points; reliability and processing capacity are also fully satisfactory. The two PLC controllers are connected through an Ethernet port, one is used as a master station, and the other is used as a slave station. The master station is used for master control, system management, data acquisition, data processing field control, execution operation and the like; and the slave station is responsible for tasks such as data acquisition/data transmission, field control, operation execution and the like. When the longitudinal tearing fault of the conveying belt is collected, the controller immediately sends out an instruction to perform the following operations: and sending out an alarm signal, stopping the conveyer belt and uploading information to a control room.

The method of using the roller active conveyor belt longitudinal tearing protection device is shown in fig. 11-14. The roller type measuring array is characterized in that an initial pressure is preset under a conveying belt, the roller type measuring array comprises a plurality of roller type measuring units 5, certain initial pressure exists when the roller type measuring units 5 are installed, a pressure mean value acquired by each measuring unit is used as a discrete point and is arranged in the X direction, a continuous pressure mean line is simulated according to a transverse geometric position, when longitudinal tearing seams appear on the conveying belt, the output values of 1 to a plurality of measuring units on the section of the conveying belt are lower than the original initial pressure values, the original pressure loses consistency, and the longitudinal tearing breakage faults of the conveying belt are judged through abrupt change points on the pressure mean line. Two special sensing modes of the narrow crack longitudinal tearing fault measuring unit are adopted for the conveying belt, wherein a certain roller is over against a crack in figure 13, and the crack is just between two rollers in figure 14. From the two ways, as long as the crack appears in the monitoring range of the measuring unit, the pressure value of at least one unit is sharply reduced (suddenly changed) as shown in the 'pressure average line graph' that the difference value of adjacent measuring units is more than 28N. Therefore, if the difference value of every two adjacent measuring units is extracted and compared, as long as the difference value of the adjacent measuring units is more than or equal to 20N, the longitudinal tearing fault of the conveying belt can be basically judged. On the other hand, because the measuring units are of roller structures, rollers rotate at high speed during measurement, output values of each measuring unit are fluctuated inevitably during operation of the conveying belt, but because the stress of adjacent rollers on the conveying belt does not have 'catastrophe points' when no fault exists, the existing difference value is very limited, and the difference value of the adjacent measuring units is not more than or equal to 20N. The total set of the difference values of the individual differences of the measuring units, the difference values caused by installation and the individual fluctuation is not more than 5N. Namely, when no fault exists, the adjacent measuring units do not have the difference value which is more than or equal to 20N, and the device can not malfunction because of the measurement reason.

To sum up, the utility model discloses active conveyer belt of gyro wheel indulges and tears protection device forms dozens of measuring unit by tens of measuring roller, and pressure sensor (weighing sensor) are installed to every measuring unit bottom, and measuring unit divides two rows of butt joints installation, installs measuring unit's truss curved surface and is similar to conveyer belt lower convex surface, has certain initial pressure during the measuring unit installation to regulated pressure keeps certain uniformity. When the conveyer belt is moving, the roller is driven to rotate, and the rotating direction of the roller is consistent with the moving direction of the conveyer belt. Dozens of measuring units touch the lower surface of the conveying belt actively like dozens of touch hands, so that the measuring units can monitor the integrity of the section of the conveying belt all the time. Due to the integrity of the cross-section of the belt, the roller-type measuring unit can be loaded with sufficient initial pressure, which can be further increased if there is a load on the belt. If a longitudinal tearing seam appears, the section of the conveying belt loses integrity, a part of the pressure of the measuring unit at the fracture is removed, namely the output value of one to a plurality of measuring units is obviously lower than the original initial pressure value, the original pressure loses certain consistency, the fact that the longitudinal tearing seam possibly appears can be judged through the reduction of the initial pressure value, and the protection device immediately makes a response. And taking the pressure mean value acquired by each measuring unit as a discrete point, arranging the discrete points in the X direction, and fitting into a continuous pressure mean line according to the transverse geometric position. If the conveyer belt has the longitudinal tearing damage fault, the pressure of the roller measuring unit at the crack is reduced, so that at least one pressure output value of the measuring unit is reduced, the 'mutation point' on the pressure equalizing line is reflected, the longitudinal tearing damage fault of the conveyer belt can be judged as long as the mutation point appears, and the protective device immediately performs protective actions such as the shutdown of the conveyer belt and the like. If the conveying belt has large cracks, a plurality of measuring units completely lose pressure, so that the large cracks can be detected without any problem as long as the measuring device can effectively measure the small cracks. The utility model discloses can detect the detection difficult point of indulging tearing the trouble effectively-the detection of narrow crack indulges tearing the trouble. The device has the advantages of accurate and reliable principle, accurate detection and high efficiency.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides an active conveyer belt of gyro wheel indulges and tears protection device which characterized in that: the device comprises a truss (4), wherein a roller type measuring array with initial pressure preset is arranged on the truss (4), the roller type measuring array comprises a plurality of roller type measuring units (5), the roller type measuring units (5) are arranged and installed on the truss (4) along the direction vertical to the conveying direction of a conveying belt, the truss (4) is of an arc structure, the arc structure is designed according to the lower convex surface profile modeling of the conveying belt, each roller type measuring unit (5) comprises a roller mechanism and a pressure sensing mechanism, each roller mechanism comprises a roller (8), the rollers (8) are abutted to the conveying belt and can rotate under the driving of the conveying belt, the pressure sensing mechanism is connected with the roller mechanisms and is used for detecting and outputting the pressure value of the roller type measuring units (5), and when the conveying belt is longitudinally torn and broken, the pressure values of 1, 2, 3 or more roller type measuring units (5) at the breakage position are lower than the original pressure values, so that the initial pressure of the roller-type measurement array is inconsistent.

2. The active conveyer belt of roller longitudinal tearing protection device of claim 1, wherein: the roller type measuring array at least comprises 2 rows of roller type measuring units (5), and the roller type measuring units (5) in adjacent rows are installed in a butt joint mode.

3. The active conveyer belt of roller longitudinal tearing protection device of claim 1, wherein: still include initial pressure adjustment mechanism, initial pressure adjustment mechanism includes adjusting bolt, supporting spring (7), the below at the both ends of truss (4) is equipped with brace table (6), adjusting bolt passes the back from the both ends of truss (4) and installs on brace table (6), supporting spring (7) set up between the tip of truss (4) and brace table (6).

4. The active conveyer belt of roller longitudinal tearing protection device of claim 1, wherein: the roller mechanism comprises rollers (8) and a shaft bracket (12), roller shafts (11) are installed on the shaft bracket (12), the rollers (8) are installed on the roller shafts (11), a pressing plate (16) is fixedly installed below the shaft bracket (12), a limiting mechanism is installed on the truss (4), two ends of the pressing plate (16) are matched with the limiting mechanism, so that the roller type measuring unit (5) has displacement capable of moving longitudinally relative to the installation surface of the roller type measuring unit, and the pressing plate (16) is connected below the pressure sensing mechanism.

5. The active conveyer belt of roller longitudinal tearing protection device of claim 4, wherein: pressing plate (16) below fixed mounting has sensor storehouse (15), the upper wall in sensor storehouse (15) is equipped with pressurization arch (14), the activity cover is equipped with in sensor storehouse (15) forced induction mechanism, forced induction mechanism including can with pressure sensor (13) of the protruding (14) contact of pressurization, the pressure that the protruding (14) of pressurization transferred down is added the impetus on pressure sensor (13) for following gyro wheel (8), spring carrier plate (25) that are used for loading initial pressure are installed to the below of pressure sensor (13).

6. The active conveyer belt of roller longitudinal tearing protection device of claim 5, wherein: the forced induction mechanism still includes the sensor mounting box, the sensor mounting box includes casing (21) and upper cover plate (27), be equipped with upper cover plate hole (26) on upper cover plate (27), pressure sensor (13) set up in the sensor mounting box, the below fixed mounting of sensor mounting box spring-loaded board (25), be provided with longitudinal extension's waist type hole on the lateral wall of casing (21), be provided with the locating pin on the lateral wall of sensor mounting box, the locating pin cooperation is installed in waist type hole, but makes the displacement volume that has relative motion between sensor mounting box and sensor storehouse (15).

7. The active conveyer belt of roller longitudinal tearing protection device of claim 4, wherein: the two ends of the pressing plate (16) are provided with grooves, limiting rods are movably arranged in the grooves in a penetrating mode, the lower ends of the limiting rods are fixed on the truss (4), and top end limiting parts with the size larger than the grooves are installed at the upper ends of the limiting rods.

8. The active conveyer belt of roller longitudinal tearing protection device of claim 4, wherein: the roller (8) is provided with a rim made of nitrile rubber, the diameter of the roller is 40-60 mm, and the thickness of the rim of the roller is 6-8 mm.

Images