Automatic sampling system

Abstract

The utility model discloses an automatic sampling system which comprises a conveying belt, a driving device, a sampler, a blanking pipe and a coal sample collecting pool, the conveying belt is horizontal, and the feeding end of the conveying belt is located at the downstream of a discharging opening of the coal storage and transportation system; the sampling device is vertically arranged above the conveying belt, the upper end of the sampling device is connected with the output end of the driving device, and the lower end of the sampling device performs circular motion along with the output end of the driving device so as to perform full-section sampling on the coal on the conveying belt; a discharging pipe is arranged beside the conveying belt, the upper end of the discharging pipe is open and located on the motion trail of the sampler, and the lower end of the discharging pipe is communicated with a coal sample collecting pool. The device has the advantages that convenience and uniformity of sampling are guaranteed, errors caused by manual sampling are avoided, meanwhile, the operation labor amount is reduced, risks in the sampling process are avoided, and personnel can know mass changes of coal conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic sampling, in particular to an automatic sampling system. Background Art

[0002] The methanol production unit uses coal as raw material and clean coal technology as the core. It adopts a four-nozzle opposed water-coal slurry pressurized gasification furnace to achieve energy conservation, emission reduction and clean production.

[0003] When the gasification system is operating normally, it consumes about 4,000 tons of raw coal per day. The raw coal of the gasification furnace of the gasification system is transported from the silo of the coal storage and transportation system to the gasification coal storage hopper via a belt. The coal transportation process is closed, and the gasification operator only takes samples and analyzes them once a day at the weighing feeder. Due to human factors, the sampling time and quantity cannot be guaranteed, making the sampling unrepresentative and unable to truly reflect the quality of the raw coal. There is a large deviation between the analysis of the coal quality entering the furnace and the actual situation. In severe cases, the fluctuation of coal quality may cause production fluctuations, increase the difficulty of process operation and reduce production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic sampling system, so as to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An automatic sampling system comprises a conveyor belt, a driving device, a sampler, a feeding pipe and a coal sample collecting pool; the conveyor belt is horizontal, and the feeding end of the conveyor belt is located downstream of the feeding port of the coal storage and transportation system; the sampler is vertically arranged above the conveyor belt, the upper end of the sampler is connected to the output end of the driving device, and the lower end of the sampler performs a circular motion with the output end of the driving device to sample the coal on the conveyor belt in its entire section; a feeding pipe is arranged on the side of the conveyor belt, the upper end of the feeding pipe is open and located on the movement trajectory of the sampler, and the lower end of the feeding pipe is connected to the coal sample collecting pool.

[0007] Preferably, the sampler comprises a rotating arm shaft and a sampling head; the rotating arm shaft comprises a connecting arm and a sampling arm, the connecting arm is coaxially connected to the output shaft of the driving device in a direction parallel to the conveying belt, the upper end of the sampling arm is vertically connected to the connecting arm, and the sampling head is arranged at the lower end of the sampling arm;

[0008] The rotating arm shaft moves in a circular motion under the drive of the driving device, so that the sampling head contacts the upper surface of the conveying belt to obtain the coal sample, and then delivers the coal sample into the open end of the feeding pipe.

[0009] Preferably, the system further comprises a conversion switch, a start / stop button and a central control room; the start / stop button and the drive device are both connected to the conversion switch; and the drive device is connected to the central control room.

[0010] Preferably, the system further comprises a working indicator light, and the working indicator light is connected to the driving device.

[0011] Preferably, the system further comprises a positioning device, and the positioning device is used to detect whether the sampling head stays on the upper surface of the conveyor belt.

[0012] Preferably, the positioning device includes a position sensor and a relay, the position sensor is arranged above the conveyor belt, and the position sensor is arranged close to the motion track of the sampling head; the position sensor is connected to the relay, and the relay is connected to the driving device.

[0013] Preferably, the driving device is a reduction motor.

[0014] Preferably, a coal bunker is provided below the discharge port of the conveyor belt, and a weighing feeder is provided below the coal bunker.

[0015] The beneficial effect of the utility model is that the gasification operator does not need to go to the conveyor belt or weighing feeder for manual sampling, which ensures the convenience and uniformity of sampling, avoids the error caused by manual sampling, reduces the operating labor, avoids the risk of the sampling process, and facilitates the personnel to understand the quality changes of the coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the sampling system in the embodiment of the utility model.

[0017] 1. Conveyor belt; 2. Driving device; 3. Rotating arm shaft; 4. Sampling head; 5. Position sensor; 6. Relay; 7. Coal bunker; 8. Weighing feeder. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0019] like Figure 1As shown, in this embodiment, an automatic sampling system is provided, including a conveyor belt 1, a driving device 2, a sampler, a feeding pipe and a coal sample collection pool; the conveyor belt 1 is horizontal, and the feeding end of the conveyor belt 1 is located downstream of the discharge port of the coal storage and transportation system; the sampler is vertically arranged above the conveyor belt 1, and the upper end of the sampler is connected to the output end of the driving device 2, and the lower end of the sampler moves in a circle with the output end of the driving device 2 to sample the coal on the conveyor belt 1 in full section; a feeding pipe is arranged on the side of the conveyor belt 1, the upper end of the feeding pipe is open and located on the movement track of the sampler, and the lower end of the feeding pipe is connected to the coal sample collection pool. A coal bunker 7 is arranged below the discharge port of the conveyor belt 1, and a weighing feeder 8 is arranged below the coal bunker 7.

[0020] The driving device 2 drives the sampler to rotate, and the lower end of the sampler gradually approaches the conveyor belt 1 and contacts its upper surface, and then all the coal material at a certain point on the upper surface is dug out horizontally. The sampler gradually leaves the conveyor belt 1 along with the driving device 2, and moves the dug coal material to the open end of the discharge pipe, and the coal sample enters the coal sample collection pool along the discharge pipe. The gasification operator does not need to go to the conveyor belt 1 or the weighing feeder 8 for manual sampling. The convenience and uniformity of sampling are ensured, the errors caused by manual sampling are avoided, the operating labor is reduced, the risks of the sampling process are avoided, and it is convenient for personnel to understand the quality changes of the coal material.

[0021] In this embodiment, the sampler includes a rotating arm shaft 3 and a sampling head 4; the rotating arm shaft 3 includes a connecting arm and a sampling arm, the connecting arm is coaxially connected to the output shaft of the driving device 2 in a direction parallel to the conveying belt 1, the upper end of the sampling arm is vertically connected to the connecting arm, and the sampling head 4 is arranged at the lower end of the sampling arm; the rotating arm shaft 3 performs a circular motion under the drive of the driving device 2, so that the sampling head 4 contacts the upper surface of the conveying belt 1 to obtain coal samples, and delivers the coal samples into the open end of the discharge pipe.

[0022] The shape of the sampling head 4 can be selected according to actual conditions. It can be a circular, semicircular, elliptical spoon-shaped structure, or a flat plate-shaped structure. It is mainly used to transfer all the coal materials at a certain point on the conveyor belt 1 into the discharge pipe along the horizontal direction.

[0023] In this embodiment, the system includes a conversion switch, a start / stop button and a central control room; the start / stop button and the drive device 2 are both connected to the conversion switch; the drive device 2 is connected to the central control room. The system has three modes: manual, automatic and remote automatic.

[0024] Manual mode: turn the on-site conversion switch to manual, press the start-stop button, and the drive device 2 drives the sampler to start working. After continuous sampling, it stops working and waits for the next manual start.

[0025] The automatic mode is: turn the conversion switch to automatic, the sampler enters the state of waiting for the control signal, and the drive device 2 drives the sampler to start working after receiving the signal, and cyclically samples according to the process of "delay-sampling-interval-sampling-interval..."

[0026] Remote automatic mode: drive device 2 receives the start / stop signal from the central control room, and after the system switches to the central control room interlocked automatic start / stop, the switch automatically becomes invalid, and the automatic sampling process is the same as the automatic mode. In the central control room control state, if emergency stop is required, the power supply needs to be disconnected.

[0027] The automatic sampling time setting can set the single sampling time (sampling volume), the interval between two samplings (sampling frequency), etc. The single sampling time can be achieved by adjusting the time relay; the sampling frequency can be set by controlling the delayed start time after power-on and considering the time for the sampling head 4 to rotate one circle.

[0028] The system is also provided with a working indicator light, which is connected to the driving device 2. When the driving device 2 is in operation, the indicator light is on.

[0029] In this embodiment, since the sampling head 4 is in circular motion, it may stop on the upper surface of the conveyor belt 1 when it stops, thereby causing wear or even damage to the conveyor belt 1 and the sampling head 4. The function of the positioning device is to prevent the sampling head 4 from stopping on the conveyor belt 1. The positioning device includes a position sensor 5 and a relay 6. The position sensor 5 is arranged above the conveyor belt 1, and the position sensor 5 is arranged close to the motion track of the sampling head 4; the position sensor 5 is connected to the relay 6, and the relay 6 is connected to the drive device 2.

[0030] The positioning system is not subject to the interlocking control of the conversion switch and the central control room. It only needs to connect the relay 6 to the power supply to start working. When the sampler stops moving, at any time when the position sensor 5 detects that the sampling head 4 is on the conveyor belt 1, the relay 6 controls the drive device 2 to move and drive the sampling head 4 to the outside of the conveyor belt 1 and stop. During the sampling process, the positioning device is in a locked state and will not be triggered. After the sampling stops, the positioning device system is triggered to start working.

[0031] In this embodiment, the driving device 2 is a reduction motor.

[0032] By adopting the above technical solution disclosed in the utility model, the following beneficial effects are obtained:

[0033] The utility model provides a systematic sampling system, and the gasification operator does not need to go to the conveyor belt or weighing feeder for manual sampling. It ensures the convenience and uniformity of sampling, avoids the error caused by manual sampling, reduces the operating labor, avoids the risk of the sampling process, and facilitates personnel to understand the quality changes of coal.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An automatic sampling system, characterized in that: It includes a conveyor belt, a driving device, a sampler, a discharge pipe and a coal sample collecting pool; the conveyor belt is horizontal, and the feeding end of the conveyor belt is located downstream of the discharge port of the coal storage and transportation system; the sampler is vertically arranged above the conveyor belt, the upper end of the sampler is connected to the output end of the driving device, and the lower end of the sampler performs a circular motion with the output end of the driving device to sample the coal on the conveyor belt in full section; a discharge pipe is arranged on the side of the conveyor belt, the upper end of the discharge pipe is open and located on the movement trajectory of the sampler, and the lower end of the discharge pipe is connected to the coal sample collecting pool.

2. The automatic sampling system according to claim 1, characterized in that: The sampler comprises a rotating arm shaft and a sampling head; the rotating arm shaft comprises a connecting arm and a sampling arm, the connecting arm is coaxially connected to the output shaft of the driving device in a direction parallel to the conveying belt, the upper end of the sampling arm is vertically connected to the connecting arm, and the sampling head is arranged at the lower end of the sampling arm; The rotating arm shaft moves in a circular motion under the drive of the driving device, so that the sampling head contacts the upper surface of the conveying belt to obtain the coal sample, and then delivers the coal sample into the open end of the feeding pipe.

3. The automatic sampling system according to claim 2, characterized in that: The system also includes a conversion switch, a start-stop button and a central control room; the start-stop button and the drive device are both connected to the conversion switch; and the drive device is connected to the central control room.

4. The automatic sampling system according to claim 3, characterized in that: The system also includes a working indicator light, which is connected to the driving device.

5. The automatic sampling system according to claim 1, characterized in that: The system also includes a positioning device, which is used to detect whether the sampling head stays on the upper surface of the conveyor belt.

6. The automatic sampling system according to claim 5, characterized in that: The positioning device comprises a position sensor and a relay. The position sensor is arranged above the conveyor belt and close to the motion track of the sampling head. The position sensor is connected to the relay, and the relay is connected to the driving device.

7. The automatic sampling system according to claim 1, characterized in that: The driving device is a reduction motor.

8. The automatic sampling system according to claim 1, characterized in that: A coal bunker is arranged below the discharge port of the conveyor belt, and a weighing feeder is arranged below the coal bunker.

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