Belt conveying automatic sampling device and method thereof

Abstract

The invention discloses a belt conveying automatic sampling device and method, the belt conveying automatic sampling device comprises a concrete foundation mounted right in front of a funnel and a head roller mounted on a headstock, a rotary gear box is mounted on the front wall of the funnel, a sampler is mounted on the rotary gear box, and the rear part of the sampler is connected with a hydraulic cylinder; a material receiving hopper is arranged under a sampling spoon of the sampler, a sample bag is arranged at a discharge port of the material receiving hopper, and a rotary material receiving device is arranged on one side of the material receiving hopper and is driven to rotate through a material receiving stepping motor; the system also comprises a programmable PLC controller, a sensor and an HMI human-machine interface, can control and monitor the operation states of the sampling device in real time, including motor operation parameters and sensor working states, and carries out fault alarm and recording. An automatic standard timing sampling mode is adopted, potential safety hazards of manual sampling are eliminated, the authenticity and stability of sampling are improved, and operation is safe and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of material transportation sampling, and particularly to an automatic sampling device and method for belt transportation. Background Art

[0002] For all enterprises producing and using ores, the quality of ores is crucial, directly affecting the production, operation and efficiency of the enterprises. Most of the transportation of ores is carried out through belt conveyors for efficient transmission. However, due to the particularity of ore products, the problem of sampling representativeness of ores has always restricted the detection quality of ore products, especially prominent in some metallurgical mines. At present, most mines still use manual sampling, and the sampling work cannot achieve standardization, and there is a problem of poor sample stability. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic sampling device and method for belt transportation, which adopts an automated standard timed sampling method to eliminate the safety hazards of manual sampling, improve the authenticity and stability of sampling, and is safe and convenient to operate, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] An automatic sampling device for belt transportation includes a concrete foundation installed directly in front of a funnel, and a head drum installed on a head frame, the head frame being fixed on the concrete foundation surface; a sweeper is installed on the side of the belt of the head drum, and two sweeper are installed directly below the belt; a rotary gearbox is installed on the front wall of the funnel, a sampler is installed on the rotary gearbox, the head of the sampler is inserted into the hollow hole of the rotary gearbox, the rear part of the sampler is connected to the hydraulic rod of a hydraulic cylinder, a supporting wheel is arranged at the lower part of the hydraulic rod, and the hydraulic cylinder is installed on a hydraulic cylinder platform; a receiving hopper is arranged directly below the sampling spoon of the sampler, the receiving hopper is installed on a receiving hopper platform, a sample bag is provided at the discharge port of the receiving hopper, and a rotary receiving device is arranged on one side of the receiving hopper, and the rotary receiving device is driven to rotate by a receiving stepping motor;

[0006] It further includes a programmable PLC controller, sensors and an HMI human-machine interface. The PLC controller is used to control the solenoid valve of the hydraulic cylinder, the start, stop, forward and reverse rotation, step positioning, timing and speed adjustment of the stepping motor according to a preset program; the sensors are proximity switches installed on the front and rear sides of the sampler. When the hydraulic cylinder works, the PLC controller controls the solenoid valve of the hydraulic cylinder to work properly by receiving the feedback signal of the sensors; the HMI human-machine interface uses a touch screen to realize human-machine interaction. The operator sets sampling parameters on the HMI, and real-time monitors the operation status of the sampling device, including motor operation parameters, sensor working status, and conducts fault alarm and recording.

[0007] Further, a hole identical to the hollow hole of the rotary gear in the rotary gearbox is opened at the corresponding position of the front wall of the funnel for the sampler to enter the funnel for sampling.

[0008] Further, a driving gear, a rotary gear and a supporting gear are arranged in the rotary gearbox; the rotary gear is located at the middle position of the rotary gearbox, with retaining rings installed on both sides and fixed by bolts; the driving gear is connected to the driving gear shaft through key A, and bearings are installed at both ends of the driving gear shaft and fixed in the bearing seats of the upper box cover and the lower box cover of the gearbox respectively through bearing caps and bolts; the driving gear is driven to rotate by the turning feed stepping motor, driving the rotary gear to rotate, and the keyway of the rotary gear drives the guiding key at the bottom of the sampler to realize the rotation and turning of the sampler.

[0009] Further, the supporting gear meshes and rotates with the rotary gear, the supporting gear is connected to the supporting gear shaft through key B, and bearings are installed at both ends of the supporting gear shaft and fixed in the bearing seats of the upper box cover and the lower box cover of the gearbox respectively through bearing caps and bolts.

[0010] Further, the connection mode between the sampler and the hydraulic rod is a rotating pair, and the step at the head of the hydraulic rod is pressed by a gland and fixed by bolts.

[0011] Further, the supporting roller consists of an arc-shaped supporting roller, a pin shaft, a stop lock piece, a bracket and bolts, and the bracket is installed on the receiving hopper platform.

[0012] Further, the rotary receiving device consists of a bracket, multi-head receiving cups and bolts. A sample bag is placed in each receiving cup of the multi-head receiving cups, and it is aligned with the material outlet of the receiving hopper for loading the sampled material.

[0013] The present invention provides another technical solution: a sampling method for a belt transportation automatic sampling device, including the following steps:

[0014] S1: After starting the belt transportation automatic sampling device, the PLC controller starts to drive the operation of the belt transportation automatic sampling device through the programmed program;

[0015] S2: The PLC controller sends a signal to the hydraulic cylinder, the forward electromagnetic valve is powered on to work, pushing the hydraulic rod to push the sampling spoon on the sampler into the receiving hopper. When it touches the forward limit sensor, the forward electromagnetic valve of the hydraulic cylinder loses power and stops to start receiving materials. After self-setting the timing, the reverse electromagnetic valve of the hydraulic cylinder is powered on to work, pushing the hydraulic rod to retreat the sampling spoon connected to the sampler filled with materials to the unloading position. When it touches the reverse limit sensor, the reverse electromagnetic valve of the hydraulic cylinder loses power and stops to prepare for unloading;

[0016] S3: After setting the timing by itself, the tipping stepping motor starts to be powered on and work. The tipping stepping motor drives the sampler connected to the slewing gear to rotate 180° for discharging. After setting the timing by itself, the tipping stepping motor drives the sampler connected to the slewing gear to rotate 180° again for resetting;

[0017] S4: After setting the timing by itself, the material receiving stepping motor starts to be powered on and work. The material receiving stepping motor drives the multi-head material receiving cup filled with materials to rotate by one step pitch, rotates the next empty sampling cup to the designated sampling position. After the set time period, the PLC controller sends a signal to the hydraulic system again to repeat the above operation procedure to perform the automatic sampling work of the second sampling cup. In this cycle, the PLC controller presets the daily sampling time period and the number of sampling times to automatically complete the automatic sampling work of belt transportation.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The automatic sampling device and method for belt transportation of the present invention adopt an automated standard timing sampling method, eliminate the safety hazards of manual sampling, improve the authenticity and stability of sampling, are safe and convenient to operate, and solve the instability and labor intensity of dynamic sampling in manual sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the sampler of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the slewing gearbox of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the rotary material receiver of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the hydraulic rod supporting wheel of the present invention;

[0025] Figure 6 It is a schematic diagram of the sampling action of the present invention;

[0026] Figure 7 It is a schematic diagram of the retracting action of the present invention;

[0027] Figure 8 It is a schematic diagram of the dumping action of the present invention;

[0028] Figure 9 It is a block diagram of the control system structure of the present invention.

[0029] In the figure: 1. Head roller; 2. Headstock; 3. Guard; 4. Hopper; 5. Belt; 6. Material; 7. Concrete foundation; 8. First cleaner; 9. Second cleaner; 10. Hydraulic cylinder; 11. Carrier roller; 111. Curved surface carrier roller; 112. Bracket; 113. Pin shaft; 114. Stop lock piece; 115. Bolt; 12. Sampler; 121. Sampling spoon; 122. gland; 123. Bolt; 13. Rotary gearbox; 131. Upper cover of gearbox; 132. Lower cover; 133. Driving gear; 134. Rotary gear; 135. Supporting gear; 136. Bearing; 137. Bearing gland; 138. Driving gear shaft; 139. Supporting gear shaft; 1310. Retaining ring; 1311. O-ring; 1312. Key A; 1313. Key B; 14. Tilting stepping motor; 15. Receiving hopper; 16. Rotary receiving device; 161. Bracket; 162. Multi-head receiving cup; 163. Bolt; 17. Sample bag; 18. Hydraulic cylinder platform; 19. Receiving hopper platform; 20. Receiving stepping motor. Detailed implementation manner

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-8, an automatic sampling device for belt transportation provided by an embodiment of the present invention includes a concrete foundation 7 installed directly in front of a funnel 4, and a head drum 1 installed on a head frame 2. The head frame 2 is fixed on the surface of the concrete foundation 7. A sweeper 8 is installed on the side of the belt 5 of the head drum 1, and a second sweeper 9 is installed directly below the belt 5. A rotary gearbox 13 is installed on the front wall of the funnel 4. A hole identical to the hollow hole of the rotary gear 134 of the rotary gearbox 13 is opened at the corresponding position on the front wall of the funnel 4 for a sampler 12 to enter the funnel 4 for sampling. The sampler 12 is installed on the rotary gearbox 13. The head of the sampler 12 is inserted into the hollow hole of the rotary gearbox 13. The rotary gearbox 13 is provided with a driving gear 133, a rotary gear 134, and a support gear 135. The rotary gear 134 is located in the middle of the rotary gearbox 13, and retaining rings 1310 are installed on both sides and fixed by bolts. The driving gear 133 is connected to a driving gear shaft 138 through a key 1312. Bearings 136 are installed at both ends of the driving gear shaft 138 and fixed in the bearing seats of the upper box cover 131 and the lower box cover 132 of the gearbox respectively through bearing caps 137 and bolts. The driving gear 133 is driven to rotate by a tipping stepping motor 14, driving the rotary gear 134 to rotate. The keyway of the rotary gear 134 drives the guiding key at the bottom of the sampler 12 to realize the rotation and tipping of the sampler 12. The support gear 135 meshes with the rotary gear 134 to rotate. The support gear 135 is connected to a support gear shaft 139 through a key 1313. Bearings 136 are installed at both ends of the support gear shaft 139 and fixed in the bearing seats of the upper box cover 131 and the lower box cover 132 of the gearbox respectively through bearing caps 137 and bolts.

[0032] Among them, the rear part of the sampler 12 is connected to the hydraulic rod of a hydraulic cylinder 10. The connection method between the sampler 12 and the hydraulic rod is a rotating pair. The step at the head of the hydraulic rod is pressed by a gland 122 and fixed by bolts 123. To ensure the stiffness and guiding accuracy of the hydraulic rod, a supporting wheel 11 is arranged at the lower part of the hydraulic rod. The supporting wheel 11 consists of a cambered surface supporting wheel 111, a pin shaft 113, a stop lock piece 114, a bracket 112, and bolts 115. The bracket 112 is installed on a receiving hopper platform 19. The hydraulic cylinder 10 is installed on a hydraulic cylinder platform 18. A receiving hopper 15 is arranged directly below the sampling spoon 121 of the sampler 12. The receiving hopper 15 is installed on the receiving hopper platform 19. A sample bag 17 is provided at the discharge port of the receiving hopper 15. A rotary receiving device 16 is arranged on one side of the receiving hopper 15. The rotary receiving device 16 consists of a bracket 161, a multi-head receiving cup 162, and bolts 163. A sample bag 17 is placed in each receiving cup of the multi-head receiving cup 162, aligned with the material port of the receiving hopper 15 for loading sampled materials. The rotary receiving device 16 is driven to rotate by a receiving stepping motor 20.

[0033] As Figure 9As shown in the figure, the embodiment of the present invention further includes a programmable PLC controller, a sensor, and an HMI human-machine interface. Among them, the PLC controller serves as the core control unit to comprehensively control the operation of the sampling device. The PLC controller has powerful logic operation and data processing capabilities and can receive signals from various sensors. The PLC controller of the present invention controls the solenoid valve to work, the start-stop, forward and reverse rotation, step distance positioning, timing, speed adjustment, etc. of the stepping motor according to a preset program. The sensor selects a proximity switch and is installed on the front and rear sides of the walking mechanism of the hydraulic sampler. When the hydraulic cylinder 10 works, the PLC controller controls the normal operation of the hydraulic cylinder solenoid valve by receiving the limit feedback signal, which is the limit switch when the sampler 12 moves forward and backward during sampling and material collection, ensuring that the sampling spoon 121 on the sampler 12 can accurately run to the specified sampling position and unloading position. Among them, the embodiment of the present invention selects the hydraulic cylinder 10 as the execution unit for the linear reciprocating motion of the sampler 12 during sampling and material collection; two stepping motors are selected, one of which is used for the 180° rotation and turning control of the sampling spoon 121 during the unloading process, and the other is used for the pre-set rotation angle material collection control of the multi-head receiving cup 162. The PLC outputs pulse signals to the stepping motor driver through a preset program, and the driver generates corresponding control signals according to the pulse signals to control the precise movement of the stepping motor. The human-machine interface (HMI) selects a touch screen to achieve human-machine interaction. The operator can set sampling parameters (such as the material collection time of the receiving spoon, the unloading time, the rotation time of the sampling cup, the number of samplings per day, the sampling time period, etc.) on the HMI, and real-time monitor the operation status of the sampling device, including the operation parameters of the motor, the working status of the sensor, etc., and perform fault alarm and recording.

[0034] In order to further better explain the embodiment of the present invention, a sampling method for a belt conveyor automatic sampling device is also provided, including the following steps:

[0035] S1: After starting the belt conveyor automatic sampling device, the PLC controller starts to drive the belt conveyor automatic sampling device to operate through a written program;

[0036] S2: The PLC controller sends a signal to the hydraulic cylinder 10, the forward solenoid valve is powered on and works, pushing the hydraulic rod to push the sampling spoon 121 on the sampler 12 into the receiving hopper 15. When it touches the forward limit sensor, the forward solenoid valve of the hydraulic cylinder 10 loses power and stops to start receiving materials. After self-setting the timing, the backward solenoid valve of the hydraulic cylinder 10 is powered on and works, pushing the hydraulic rod to retreat the sampling spoon 121 connected to the sampler 12 filled with materials to the unloading position. When it touches the backward limit sensor, the backward solenoid valve of the hydraulic cylinder 10 loses power and stops to prepare for unloading;

[0037] S3: After the self-set timing, the tilting stepping motor 14 starts to be powered on and work. The tilting stepping motor 14 drives the sampler 12 connected to the rotary gear 134 to rotate 180° for discharging. After the self-set timing, the tilting stepping motor 14 drives the sampler 12 connected to the rotary gear 134 to rotate 180° again for resetting;

[0038] S4: After the self-set timing, the material receiving stepping motor 20 starts to be powered on and work. The material receiving stepping motor 20 drives the multi-head material receiving cup 162 filled with materials to rotate by one step, rotates the next empty sampling cup to the specified sampling position. After a self-set time period, the PLC controller sends a signal to the hydraulic system again to repeat the above operation program to perform the automatic sampling work of the second sampling cup. In this cycle, the automatic sampling work of belt transportation is automatically completed by presetting the daily sampling time period and sampling times through the PLC controller.

[0039] In summary, an automatic sampling device and method for belt transportation provided by the present invention adopt an automated standard timed sampling method, eliminate the safety hazards of manual sampling, improve the authenticity and stability of sampling, are safe and convenient to operate, and solve the instability and labor intensity of dynamic sampling in manual sampling.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A belt conveyor automatic sampling device, characterized in that: The invention comprises a concrete foundation (7) installed in front of a funnel (4), and a head roller (1) installed on a head frame (2), wherein the head frame (2) is fixed on the surface of the concrete foundation (7); a first sweeper (8) is installed on the side of a belt (5) of the head roller (1), and a second sweeper (9) is installed directly below the belt (5); a rotary gear box (13) is installed on the front wall of the funnel (4), a sampler (12) is installed on the rotary gear box (13), a head of the sampler (12) is inserted into a hollow hole of the rotary gear box (13), and the sampler (12) is inserted into a hollow hole of the rotary gear box (13). 2) The rear portion is connected to the hydraulic rod of the hydraulic cylinder (10), a supporting wheel (11) is provided at the lower portion of the hydraulic rod, and the hydraulic cylinder (10) is mounted on the hydraulic cylinder platform (18); a receiving hopper (15) is provided directly below the sampling spoon (121) of the sampler (12), the receiving hopper (15) is mounted on the receiving hopper platform (19), a sample bag (17) is provided at the discharge port of the receiving hopper (15), a rotating receiving device (16) is provided on one side of the receiving hopper (15), and the rotating receiving device (16) is driven to rotate by a receiving stepping motor (20); It also includes a programmable PLC controller, a sensor and an HMI human-machine interface. The PLC controller is used to control the operation of the solenoid valve of the hydraulic cylinder (10), the start and stop, forward and reverse rotation, step positioning, timing, and speed adjustment of the stepping motor according to a preset program; the sensor is installed on the front and rear sides of the sampler (12) using a proximity switch. When the hydraulic cylinder (10) is working, the PLC controller controls the normal operation of the solenoid valve of the hydraulic cylinder (10) by receiving the sensor feedback signal; the HMI human-machine interface uses a touch screen to realize human-machine interaction. The operator sets the sampling parameters on the HMI to monitor the operating status of the sampling device in real time, including the motor operating parameters and the sensor operating status, and to perform fault alarms and records.

2. A belt conveyor automatic sampling device as claimed in claim 1, characterized in that: A similar hole is opened at a position on the front wall of the funnel (4) corresponding to the hollow hole of the rotary gear (134) of the rotary gear box (13), for the sampler (12) to enter the funnel (4) for sampling.

3. The belt conveyor automatic sampling device according to claim 1, characterized in that: The rotary gear box (13) is provided with a driving gear (133), a rotary gear (134) and a supporting gear (135); the rotary gear (134) is located in the middle of the rotary gear box (13), and retaining rings (1310) are installed on both sides and fixed by bolts; the driving gear (133) is connected to the driving gear shaft (138) through a key A (1312), and bearings (136) are installed at both ends of the driving gear shaft (138) and are fixed in the bearing seats of the upper box cover (131) and the lower box cover (132) of the gear box through bearing pressure covers (137) and bolts respectively; the driving gear (133) is driven to rotate by the material turning stepping motor (14), thereby driving the rotary gear (134) to rotate, and the keyway of the rotary gear (134) drives the guide key at the bottom of the sampler (12) to realize the rotation and material turning of the sampler (12).

4. A belt conveyor automatic sampling device as claimed in claim 3, characterized in that: The support gear (135) meshes and rotates with the rotary gear (134). The support gear (135) is connected to the support gear shaft (139) via a key B (1313). Bearings (136) are installed at both ends of the support gear shaft (139) and are fixed in bearing seats of the upper box cover (131) and the lower box cover (132) of the gear box by bolts through bearing glands (137).

5. The belt conveyor automatic sampling device according to claim 1, characterized in that: The sampler (12) is connected to the hydraulic rod in a revolute pair, and a pressure cover (122) is used to press the step of the hydraulic rod head, and bolts (123) are used to fix it.

6. The belt conveyor automatic sampling device according to claim 1, characterized in that: The supporting wheel (11) is composed of a curved supporting wheel (111), a pin shaft (113), a locking plate (114), a bracket (112) and a bolt (115), and the bracket (112) is installed on the hopper platform (19).

7. The belt conveyor automatic sampling device according to claim 1, characterized in that: The rotary material receiver (16) is composed of a bracket (161), a multi-head material receiving cup (162), and a bolt (163). A sample bag (17) is placed in each material receiving cup of the multi-head material receiving cup (162) and is aligned with the material opening of the material receiving hopper (15) for loading and taking out sample materials.

8. A sampling method for the belt conveyor automatic sampling device according to claim 1, characterized in that: The following steps are involved: S1: After starting the belt conveyor automatic sampling device, the PLC controller starts to drive the belt conveyor automatic sampling device to operate through the programmed program; S2: The PLC controller sends a signal to the hydraulic cylinder (10), the forward solenoid valve is energized and works, and the hydraulic rod is pushed to push the sampling spoon (121) on the sampler (12) into the receiving hopper (15). When the forward limit sensor is hit, the forward solenoid valve of the hydraulic cylinder (10) is de-energized and stops to start receiving materials. After the timing is set by itself, the backward solenoid valve of the hydraulic cylinder (10) is energized and works, and the hydraulic rod is pushed to move the sampling spoon (121) connected to the sampler (12) and filled with materials backward to the unloading position. When the backward limit sensor is hit, the backward solenoid valve of the hydraulic cylinder (10) is de-energized and stops to prepare for unloading. S3: After the timing is set by itself, the material turning stepper motor (14) starts to be powered on and starts to work. The material turning stepper motor (14) drives the sampler (12) connected to the rotary gear (134) to rotate 180° to unload. After the timing is set by itself, the material turning stepper motor (14) drives the sampler (12) connected to the rotary gear (134) to rotate 180° to reset. S4: After the timing is set by itself, the material receiving stepper motor (20) starts to be powered on and drives the multi-head material receiving cup (162) filled with materials to rotate by one step, and rotates the next empty sampling cup to the designated sampling position. After the time period is set by itself, the PLC controller sends a signal to the hydraulic system again to repeat the above operation program, and perform the automatic sampling work of the second sampling cup. In this cycle, the automatic sampling work of the belt conveyor is automatically completed by presetting the sampling time period and sampling frequency of each day through the PLC controller.

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