Automatic sampling device and automatic sampling method

Abstract

The invention provides an automatic sampling device and an automatic sampling method. The automatic sampling device comprises a sampling part, a driving part, a force measuring part and a control part, the driving part is connected with the sampling part, and the driving part is assembled to be capable of driving the sampling part to reciprocate in the vertical direction; the force measuring part is used for detecting the tensile force between the sampling part and the driving part; the control part is electrically connected with the force measuring part and the driving part, and the control part is configured to control the driving part to act according to detection data of the force measuring part. The invention provides an automatic sampling device and an automatic sampling method, the automatic sampling device uses a force measuring part to detect the tensile force between a sampling part and a driving part and feeds back the tensile force to a control part, and the control part judges whether the sampling part touches the bottom or not according to the tensile force and performs contact sampling. By using the automatic sampling device, the ascending and descending lengths of the sampling part can be accurately controlled, an upper limit and a lower limit do not need to be mounted, and the automatic sampling device is suitable for more use scenes.

Description

Technical Field

[0001] The invention relates to the field of steel and nonferrous metal smelting production, and in particular to an automatic sampling device and an automatic sampling method. Background Art

[0002] At present, the molten pool sampling methods in the steel and nonferrous metal industries are mostly manual sampling and automatic sampling. The sampling rod is manually controlled to be inserted into the smelting furnace and then lifted up. This method has the problems of high risk, easy interference of measurement results, and long measurement time.

[0003] As for the in-place limit control of the automatic control sampling rod, the common control method is to trigger it through the touch of the limit switch and the induction of the photoelectric switch. After it is in place, the switch is actuated, and the switch signal is fed back to the controller, which outputs a stop action command. Or the entire rise and fall process is detected by the travel limiter to detect the number of winch turns, and the number of turns is used to confirm the rise or fall length of the wire rope. However, upper and lower limits cannot be installed in some scenes or areas. When using the travel limiter control, there is an uneven wire rope code line, which leads to inconsistency between the outgoing line and the incoming line, which can easily cause inconsistent rise and fall lengths. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the present invention provides an automatic sampling device and an automatic sampling method to improve the technical problem of inaccurate control of the rising and falling lengths of the automatic sampling device in the prior art.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides an automatic sampling device, comprising: a sampling part, a driving part, a force measuring part and a control part.

[0006] The driving part is connected to the sampling part, and the driving part is equipped to drive the sampling part to reciprocate in the vertical direction; the force measuring part is used to detect the magnitude of the pulling force between the sampling part and the driving part; the control part is electrically connected to the force measuring part and the driving part, and the control part is configured to control the action of the driving part according to the detection data of the force measuring part.

[0007] In one example of the present invention, the control unit is also used for timing; the control unit counts when the sampling unit descends and uses it as the descending time, the control unit counts when the sampling unit stops descending and uses it as the sampling time, and the control unit counts when the sampling unit rises and uses it as the rising time.

[0008] In one example of the present invention, a counterweight portion for increasing weight is detachably provided on the sampling portion.

[0009] In one example of the present invention, the driving part is fixedly arranged on one side of the molten pool to be sampled, the force measuring part is fixedly arranged on the upper side of the molten pool to be sampled, the sampling part and the driving part are connected by a steel wire, and the steel wire is fixed on the force measuring part by sliding a pulley.

[0010] In one example of the present invention, an automatic sampling method is also provided, which is used in the automatic sampling system as described above; the automatic sampling method comprises:

[0011] The control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold;

[0012] The control unit sends an ascending control instruction to the driving unit after the sampling time reaches a preset sampling time threshold;

[0013] The control unit controls the sampling unit to rise and controls the sampling unit to stop after the pulling force reaches a preset second pulling force threshold.

[0014] In an example of the present invention, the control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold, including:

[0015] The control unit sends a descending control instruction to the driving unit to control the sampling unit to descend, and counts as the descending time;

[0016] The control unit obtains the tensile force of the sampling unit in real time through the force measuring unit;

[0017] When the falling time is greater than or equal to the preset falling time threshold and the pulling force reaches the preset first pulling force threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

[0018] In an example of the present invention, the control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold, and further includes a descent protection:

[0019] When the falling time is greater than a preset protection time threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

[0020] In an example of the present invention, the control unit controls the sampling unit to rise and controls the sampling unit to stop after the tension reaches a preset second tension threshold, including:

[0021] The control unit sends a control instruction of ascending to the driving unit so as to control the ascending of the sampling unit;

[0022] The control unit obtains the tensile force of the sampling unit in real time through the force measuring unit;

[0023] When the pulling force reaches a preset second pulling force threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

[0024] In one example of the present invention, the control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold, and also includes an ascending protection:

[0025] The control unit starts timing when the sampling unit starts to rise and uses the timing as the rising time;

[0026] When the rise time is greater than a preset rise time threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

[0027] In an example of the present invention, the rising time threshold is the sum of the time taken by the sampling portion from the beginning of the decline to the bottoming out and a preset time difference.

[0028] The present invention provides an automatic sampling device and an automatic sampling method. The automatic sampling device uses a force measuring part to detect the pulling force between a sampling part and a driving part, and feeds back the pulling force to a control part. The control part determines whether the sampling part touches the bottom according to the pulling force and performs contact sampling. The automatic sampling device can accurately control the length of the sampling part rising and falling, and does not need to install upper and lower limit stops, which is suitable for more use scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of an automatic sampling device in one embodiment of the present invention;

[0031] Figure 2 A flowchart of an automatic sampling method according to an embodiment of the present invention;

[0032] Figure 3 A flow chart showing the descent of the sampling part in one embodiment of the present invention;

[0033] Figure 4 This is a flow chart of the rise of the sampling unit in one embodiment of the present invention.

[0034] Component number description

[0035] 100, sampling unit; 200, driving unit; 300, force measuring unit; 400, control unit. DETAILED DESCRIPTION

[0036] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0037] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any methods, equipment and materials of the prior art similar or equivalent to the methods, equipment and materials described in the embodiments of the present invention can also be used to implement the present invention.

[0038] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0039] See also Figures 1 to 4 The present invention provides an automatic sampling device and an automatic sampling method. The automatic sampling device uses a force measuring part 300 to detect the pulling force between the sampling part 100 and the driving part 200, and feeds back the pulling force to the control part 400. The control part 400 determines whether the sampling part 100 touches the bottom according to the pulling force and performs contact sampling. The automatic sampling device can accurately control the length of the sampling part 100 to rise and fall, so as to improve the technical problem of inaccurate control of the rising and falling length of the automatic sampling device in the prior art. In addition, the present invention does not need to install upper and lower limit stops, and is suitable for more usage scenarios.

[0040] See also Figure 1 The automatic sampling device includes: a sampling part 100, a driving part 200, a force measuring part 300 and a control part 400.

[0041] The sampling part 100 is used to enter the molten pool and contact the bottom of the molten pool for hanging materials. The shape of the sampling part 100 includes but is not limited to cylindrical, prismatic, etc. The sampling part 100 can also be provided with a detachable counterweight part to increase the total weight of the sampling part 100 so that the sampling part 100 can touch the bottom.

[0042] The driving part 200 is connected to the sampling part 100, and the driving part 200 is configured to drive the sampling part 100 to reciprocate in the vertical direction. The driving part 200 drives the sampling part 100 to move downward into the molten pool for sampling, and drives the sampling part 100 to move upward out of the molten pool after the sampling is completed.

[0043] The force measuring unit 300 is used to detect the magnitude of the pulling force between the sampling unit 100 and the driving unit 200. The force measuring unit 300 sends the detected magnitude of the pulling force to the control unit 400, so that the control unit 400 determines whether the sampling unit 100 has bottomed out according to the magnitude of the pulling force, and then stops the downward movement of the sampling unit 100.

[0044] The control unit 400 is electrically connected to the force measuring unit 300 and the driving unit 200, respectively. The control unit 400 receives the information transmitted by the force measuring unit 300 to obtain the magnitude of the pulling force, and the control unit 400 controls the driving unit 200 to work and complete the movement of the sampling unit 100 rising or falling. The control unit 400 sends a descending instruction to the driving unit 200 to control the driving unit 200 to drive the sampling unit 100 to move downward into the molten pool for sampling. When the sampling unit 100 touches the bottom, the pulling force will decrease. At this time, the control unit 400 sends a stop instruction to the driving unit 200 to control the driving unit 200 to drive the sampling unit 100 to stop and no longer move. After the sampling is completed, the control unit 400 sends an ascending instruction to the driving unit 200 to drive the sampling unit 100 to rise.

[0045] See also Figure 1 In one embodiment of the present invention, the driving part 200 is fixedly arranged on one side of the molten pool to be sampled, the force measuring part 300 is fixedly arranged on the upper side of the molten pool to be sampled, the sampling part 100 is connected to the driving part 200 by a steel wire, and the steel wire is fixed on the force measuring part 300 by sliding a pulley.

[0046] In one embodiment of the present invention, the control unit 400 is also used for timing. The control unit 400 counts when the sampling unit 100 is descending and uses it as the descending time. The control unit 400 counts when the sampling unit 100 stops descending and uses it as the sampling time. The control unit 400 counts when the sampling unit 100 is ascending and uses it as the ascending time. The control unit 400 performs descending protection on the sampling unit 100 according to the descending time to prevent the sampling unit 100 from descending too much. The control unit 400 performs ascending protection on the sampling unit 100 according to the ascending time to prevent the sampling unit 100 from ascending too much.

[0047] See also Figure 2In one embodiment of the present invention, an automatic sampling method is also provided, which is used in any of the automatic sampling systems described above. The automatic sampling method includes steps S1 to S3, which are described in detail as follows:

[0048] In step S1 , the control unit 400 controls the sampling unit 100 to descend and controls the sampling unit 100 to stop when the tension reaches a preset first tension threshold.

[0049] The control unit 400 sends a descending control instruction to the driving unit 200 to control the sampling unit 100 to descend, and counts the time as the descending time.

[0050] The control unit 400 obtains the pulling force of the sampling unit 100 in real time through the force measuring unit 300 .

[0051] When the falling time is greater than or equal to the preset falling time threshold and the pulling force reaches the preset first pulling force threshold, the control unit 400 sends a stop control instruction to the driving unit 200 to control the sampling unit 100 to stop.

[0052] See also Figure 3 In one embodiment of the present invention, the control unit 400 sends a descending control to the driving unit 200 and counts as the descending time when the driving unit 200 is in action. The driving unit 200 receives the command of the control unit 400 and drives the sampling unit 100 to descend and enter the molten pool to take samples. During the whole process, the force measuring unit 300 detects the tension in real time and feeds it back to the control unit 400. The control unit 400 uses the descending time and the tension to determine whether the sampling unit 100 touches the bottom for sampling. The preset first tension threshold is the tension value when the sampling unit 100 touches the bottom. After the sampling unit 100 touches the bottom, the tension between the sampling unit 100 and the force measuring unit 300 will decrease. At this time, the tension reaches the preset first tension threshold. If the descending time also reaches the preset descending time threshold, the controller stops timing and saves the value of the descending time at this time, and sends a stop control command to the driving unit 200. The driving unit receives the command and stops the action, so that the sampling unit 100 no longer descends.

[0053] In one embodiment of the present invention, the control unit 400 controls the sampling unit 100 to descend and controls the sampling unit 100 to stop when the tension reaches a preset first tension threshold, and further includes a descent protection: when the descent time is greater than the preset protection time threshold, the control unit 400 sends a stop control instruction to the driving unit 200 to control the sampling unit 100 to stop, thereby preventing the sampling rod from descending excessively.

[0054] In step S2 , the control unit 400 sends an ascending control instruction to the driving unit 200 after the sampling time reaches a preset sampling time threshold.

[0055] In one embodiment of the present invention, the control unit 400 stops timing the descending time and sends a stop control instruction to the driving unit 200, and then restarts timing as the sampling time. When the sampling time reaches the preset sampling time threshold, the sampling unit 100 has completed the hanging of the material, and the control unit 400 sends an ascending control instruction to the driving unit 200. In this embodiment,

[0056] In step S3 , the control unit 400 controls the sampling unit 100 to rise and controls the sampling unit 100 to stop after the tension reaches a preset second tension threshold.

[0057] The control unit 400 sends a control instruction for ascending to the driving unit 200 so as to control the sampling unit 100 to ascend.

[0058] The control unit 400 obtains the pulling force of the sampling unit 100 in real time through the force measuring unit 300 .

[0059] When the pulling force reaches a preset second pulling force threshold, the control unit 400 sends a stop control instruction to the driving unit 200 to control the sampling unit 100 to stop.

[0060] See also Figure 4 In one embodiment of the present invention, after receiving the control instruction of rising, the control unit 400 drives the sampling unit 100 to rise, and at the same time obtains the tension between the sampling unit 100 and the driving unit 200 in real time through the force measuring unit 300, so as to judge whether the sampling unit 100 has risen to the right position. The preset second tension is the value of the tension between the sampling unit 100 and the driving unit 200 when the sampling unit 100 has not entered the liquid surface of the molten pool. When the tension reaches the preset second tension, the sampling rod has risen out of the molten pool. The control unit 400 sends a stop control instruction to the driving unit 200, and the driving unit 200 stops the action after receiving it, thereby controlling the sampling unit 100 to stop, and then completing the sampling. The process of the sampling part 100 rising also includes rising protection: the control part 400 counts when the sampling part 100 starts to rise and uses it as the rising time; when the rising time is greater than the preset rising time threshold, the control part 400 sends a stop control instruction to the driving part 200 to control the sampling part 100 to stop, so as to prevent the sampling part 100 from rising too much and to prevent the driving part 200 from being damaged. The rising time threshold is the sum of the time taken by the sampling part 100 from starting to fall to touching the bottom and the preset time difference. For example, in one embodiment, the rising time threshold is T1+t, where T1 is the time taken by the sampling part 100 from starting to fall to touching the bottom, and t is the preset time difference. In this embodiment, the preset time difference t is 3 seconds. When the rising time of the sampling part 100 exceeds the time taken by the sampling part 100 from starting to fall to touching the bottom by 3 seconds, the rising protection is performed to prevent the sampling part 100 from rising too much.

[0061] The present invention provides an automatic sampling device and an automatic sampling method, which judges whether the sampling part 100 rises or falls to the right position by the pulling force between the sampling part 100 and the driving part 200 and the time taken for the sampling part 100 to rise or fall. The automatic sampling device also includes rising protection and falling protection. If the falling time of the sampling part 100 is too long, the falling protection is triggered to stop the sampling part 100 from continuing to fall. If the rising time of the sampling part 100 is too long, the rising protection is triggered to stop the sampling part 100 from continuing to rise. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0062] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An automatic sampling device, characterized in that: include: Sampling Department; A driving part connected to the sampling part, and the driving part is configured to drive the sampling part to reciprocate in a vertical direction; A force measuring part, used for detecting the magnitude of the pulling force between the sampling part and the driving part; A control unit is electrically connected to the force measuring unit and the driving unit, and is configured to control the operation of the driving unit according to detection data of the force measuring unit.

2. The automatic sampling device according to claim 1, characterized in that: The control unit is also used for timing; the control unit counts when the sampling unit descends and uses it as the descending time, the control unit counts when the sampling unit stops descending and uses it as the sampling time, and the control unit counts when the sampling unit rises and uses it as the rising time.

3. The automatic sampling device according to claim 1, characterized in that: The sampling part is detachably provided with a counterweight part for increasing weight.

4. The automatic sampling device according to claim 1, characterized in that: The driving part is fixedly arranged on one side of the molten pool to be sampled, the force measuring part is fixedly arranged on the upper side of the molten pool to be sampled, the sampling part is connected to the driving part through a steel wire, and the steel wire is slidably fixed on the force measuring part through a pulley.

5. An automatic sampling method, characterized in that: An automatic sampling system for use in any one of claims 1 to 4; the automatic sampling method comprising: The control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold; The control unit sends an ascending control instruction to the driving unit after the sampling time reaches a preset sampling time threshold; The control unit controls the sampling unit to rise and controls the sampling unit to stop after the pulling force reaches a preset second pulling force threshold.

6. The automatic sampling method according to claim 5, characterized in that: The control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold, including: The control unit sends a descending control instruction to the driving unit to control the sampling unit to descend, and counts as the descending time; The control unit obtains the tension of the sampling unit in real time through the force measuring unit; When the falling time is greater than or equal to a preset falling time threshold and the pulling force reaches a preset first pulling force threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

7. The automatic sampling method according to claim 6, characterized in that: The control unit controls the sampling unit to descend and controls the sampling unit to stop when the pulling force reaches a preset first pulling force threshold, and also includes descending protection: When the falling time is greater than a preset protection time threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

8. The automatic sampling method according to claim 5, characterized in that: The control unit controls the sampling unit to rise and controls the sampling unit to stop after the tension reaches a preset second tension threshold, including: The control unit sends a control instruction for ascending to the driving unit so as to control the sampling unit to ascend; The control unit obtains the tension of the sampling unit in real time through the force measuring unit; When the pulling force reaches a preset second pulling force threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

9. The automatic sampling method according to claim 8, characterized in that: The control unit controls the sampling unit to descend and controls the sampling unit to stop when the tension reaches a preset first tension threshold, and also includes an ascending protection: The control unit counts the time when the sampling unit starts to rise and uses it as the rising time; When the rise time is greater than a preset rise time threshold, the control unit sends a stop control instruction to the driving unit to control the sampling unit to stop.

10. The automatic sampling method according to claim 8, characterized in that: The rising time threshold is the sum of the time taken by the sampling portion from the beginning of the decline to the bottoming out and a preset time difference.

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