Sampling head grounding rebound detection method

Abstract

The invention discloses a sampling head grounding rebound detection method. Originally designed sampling depth causes that a coal seam at the bottom of the automobile cannot be sampled, a sampling blind area exists, and excessive pressure or damage is caused to the bottom of the automobile when the lifting counting of a sampling rod is wrong. The method comprises the following steps: a sampling head realizes a grounding detection basis; after the sampling head is in contact with the bottom of the carriage, the PLC receives and monitors an output value of the tension sensor in real time, system program control is carried out, descending of the sampling head is stopped before counter-acting force reaches the maximum limit value, and safe full-section sampling is achieved; the sampling head realizes a detection means of grounding rebound; more than two grounding rebound detection means must be provided and used at the same time, so that the reliability of grounding rebound is ensured; the protection measures on the bottom of the automobile compartment during grounding rebound are realized; and a supplement measure for grounding rebound failure is taken. The method is applied to sampling head grounding rebound detection.

Description

Technical Field

[0001] The invention relates to a sampling head bottoming-out detection method. Background Art

[0002] The original design of the coal sampling equipment for fuel trucks entering the factory was defective. First, the original design sampling depth resulted in the coal layer under the truck not being sampled, resulting in a sampling blind spot, leaving room for suppliers to adulterate the bottom. Second, when the sampling rod lifting and counting errors occurred, excessive pressure or damage was caused to the bottom of the truck, which could easily damage the sampling device, sampling head, coal truck compartment and tie rods. This defect seriously affects the safety, accuracy and reliability of sampling. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems, thereby providing a sampling head bottoming rebound detection method.

[0004] The above purpose is achieved through the following technical solutions: A sampling head bottoming rebound detection method, the method comprising the following steps: (1) Detection basis for the sampling head to achieve bottoming; After the sampling head contacts the bottom of the carriage, the PLC receives and monitors the output value of the tension sensor in real time. The system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, so as to achieve safe full-section sampling. (2) Detection method for the sampling head to achieve bottoming out and rebound; Two or more bottoming-out detection methods must be provided and used simultaneously to ensure the reliability of bottoming-out; (3) Protective measures for the bottom of the vehicle compartment when bottoming out; (4) Supplementary measures if bottoming out and rebounding fail.

[0005] After the bottoming rebound fails, the trolley may be lifted up by the sampling head and cause a derailment accident. When the trolley is lifted up, the wheels will also leave the track. Multiple track detection sensor switches should be installed on the trolley to transmit signals to the PLC at the moment the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head and avoid derailment accidents.

[0006] The sampling head bottoming rebound detection method described above, the specific process of step (1) is as follows: after the sampling head contacts the bottom of the carriage, it is necessary to ensure that the sampling head does not damage the bottom of the carriage. As long as the sampling head has not reached the lower limit switch, it will continue to execute the descending process. Since the sampling head is blocked and cannot descend any further at this time, the sampling head transmission mechanism forms a reaction force to lift the sampling head frame and the trolley upward. The magnitude of this force is detected to be 0.8t-1.8t. The PLC receives and monitors the output value of the tension sensor in real time. The system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, thereby achieving safe full-section sampling.

[0007] The specific process of the step (3) is as follows: the protective measure for the bottom of the automobile compartment is mainly that the outer tube of the sampling head is 5 mm longer than the spiral drill rod, and when the sampling head hits the bottom, the outer tube contacts the bottom of the vehicle, and a 5 mm gap is left between the spiral drill rod and the bottom of the vehicle, thereby ensuring the safety of the vehicle. The sampling head provided has a long service life and good sampling efficiency, thereby ensuring the absolute safety of the vehicle during sampling.

[0008] In the sampling head bottoming rebound detection method, the specific process of step (4) is as follows: after the bottoming rebound fails, the trolley may be lifted up by the sampling head, causing a derailment accident. When the trolley is lifted up, the wheels will also be off the track. The equipment manufacturer should install multiple track detection sensor switches on the trolley, and transmit the signal to the PLC at the moment the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head, thereby avoiding a derailment accident. Beneficial Effects

[0009] 1. The present invention installs multiple track detection induction switches on the trolley, and transmits signals to the PLC when the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head, thereby avoiding derailment accidents.

[0010] 2. The protective measure for the bottom of the car compartment of the present invention is mainly that the outer tube of the sampling head is 5mm longer than the spiral drill rod. When the sampling head touches the bottom, the outer tube contacts the bottom of the car, and there is a 5mm gap between the spiral drill rod and the bottom of the car, thereby ensuring the safety of the vehicle. The sampling head provided by the supplier has a long service life and good sampling efficiency, ensuring the absolute safety of the vehicle during sampling.

[0011] 3. After the sampling head of the present invention contacts the bottom of the carriage, the sampling head will continue to descend as long as it has not reached the lower limit switch. Since the sampling head is blocked and cannot descend any further at this time, the transmission mechanism of the sampling head forms a reaction force to lift the sampling head frame and the trolley upward, and detect the size of this force. The PLC receives and monitors the output value of the tension sensor in real time, and the system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, thereby achieving safe full-section sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Attached Figure 1 It is a structural diagram of the protection of the carriage body by bottoming out and rebounding. DETAILED DESCRIPTION

[0013] A sampling head bottoming rebound detection method, the method comprising the following steps: (1) Detection basis for the sampling head to achieve bottoming; After the sampling head contacts the bottom of the carriage, the PLC receives and monitors the output value of the tension sensor in real time. The system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, so as to achieve safe full-section sampling. (2) Detection method for the sampling head to achieve bottoming out and rebound; Two or more bottoming-out detection methods must be provided and used simultaneously to ensure the reliability of bottoming-out; (3) Protective measures for the bottom of the vehicle compartment when bottoming out; (4) Supplementary measures if bottoming out and rebounding fail.

[0014] After the bottoming rebound fails, the trolley may be lifted up by the sampling head and cause a derailment accident. When the trolley is lifted up, the wheels will also leave the track. Multiple track detection sensor switches should be installed on the trolley to transmit signals to the PLC at the moment the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head and avoid derailment accidents.

[0015] The sampling head bottoming rebound detection method described above, the specific process of step (1) is as follows: after the sampling head contacts the bottom of the carriage, it is necessary to ensure that the sampling head does not damage the bottom of the carriage. As long as the sampling head has not reached the lower limit switch, it will continue to execute the descending process. Since the sampling head is blocked and cannot descend any further at this time, the sampling head transmission mechanism forms a reaction force to lift the sampling head frame and the trolley upward. The magnitude of this force is detected to be 0.8t-1.8t. The PLC receives and monitors the output value of the tension sensor in real time. The system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, thereby achieving safe full-section sampling.

[0016] The specific process of the step (3) is as follows: the protective measure for the bottom of the automobile compartment is mainly that the outer tube of the sampling head is 5 mm longer than the spiral drill rod, and when the sampling head hits the bottom, the outer tube contacts the bottom of the vehicle, and a 5 mm gap is left between the spiral drill rod and the bottom of the vehicle, thereby ensuring the safety of the vehicle. The sampling head provided has a long service life and good sampling efficiency, thereby ensuring the absolute safety of the vehicle during sampling.

[0017] In the sampling head bottoming rebound detection method, the specific process of step (4) is as follows: after the bottoming rebound fails, the trolley may be lifted up by the sampling head, causing a derailment accident. When the trolley is lifted up, the wheels will also be off the track. The equipment manufacturer should install multiple track detection sensor switches on the trolley, and transmit the signal to the PLC at the moment the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head, thereby avoiding a derailment accident.

Claims

1. A sampling head bottoming rebound detection method, characterized by: The method comprises the following steps: (1) Detection basis for the sampling head to achieve bottoming; After the sampling head contacts the bottom of the carriage, the PLC receives and monitors the output value of the tension sensor in real time. The system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, so as to achieve safe full-section sampling. (2) Detection method for the sampling head to achieve bottoming out and rebound; Two or more bottoming-out detection methods must be provided and used simultaneously to ensure the reliability of bottoming-out; (3) Protective measures for the bottom of the vehicle compartment when bottoming out; (4) Supplementary measures if bottoming out and rebounding fail.

2. After the bottoming out and rebounding fails, the trolley may be lifted up by the sampling head and cause a derailment accident. When the trolley is lifted up, the wheels will also leave the track. Multiple track detection sensor switches should be installed on the trolley to transmit the signal to the PLC at the moment the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head and avoid derailment accidents.

3. A sampling head bottoming out detection method according to claim 1, characterized in that: The specific process of step (1) is as follows: after the sampling head contacts the bottom of the carriage, it is necessary to ensure that the sampling head does not damage the bottom of the carriage. As long as the sampling head has not reached the lower limit switch, it will continue to execute the descending process. Since the sampling head is blocked and cannot descend any further at this time, the sampling head transmission mechanism forms a reaction force to lift the sampling head frame and the trolley upward. The magnitude of this force is detected to be 0.8t-1.8t. The PLC receives and monitors the output value of the tension sensor in real time. The system program controls the sampling head to stop descending before the reaction force reaches the maximum limit value, thereby achieving safe full-section sampling.

4. A sampling head bottoming out detection method according to claim 1, characterized in that: The specific process of step (3) is as follows: the protective measure for the bottom of the car compartment is mainly that the outer tube of the sampling head is 5 mm longer than the spiral drill rod. When the sampling head touches the bottom, the outer tube contacts the bottom of the car, and a 5 mm gap is left between the spiral drill rod and the bottom of the car, thereby ensuring the safety of the vehicle. The sampling head provided has a long service life and good sampling efficiency, ensuring the absolute safety of the vehicle during sampling.

5. The sampling head bottoming out detection method according to claim 1, characterized in that: The specific process of step (4) is as follows: after the bottoming out fails, the trolley may be lifted up by the sampling head, causing a derailment accident. When the trolley is lifted up, the wheels will also be off the track. The equipment manufacturer should install multiple track detection sensor switches on the trolley, and transmit the signal to the PLC at the moment the trolley is lifted up. The PLC cuts off the power of the sampling head lifting motor to prevent the trolley from being further lifted up by the sampling head, thereby avoiding a derailment accident.

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