A detection device and detection method for tungsten wire rope performance

Abstract

The invention discloses a detection device for the performance of a tungsten wire rope and a detection method thereof, comprising: a measuring back plate, a display mechanism, and a control mechanism, wherein an elastic force detection mechanism is installed at one end of the measuring back plate, and a fixing mechanism matched with the elastic force detection mechanism is installed at the other end; a fixing mechanism for fixing the tungsten wire rope is installed on the elastic force detection mechanism, a slidable displacement detection mechanism is installed below the fixing mechanism, and a measuring mechanism is installed on the displacement detection mechanism; the elastic force detection mechanism and the measuring mechanism are both connected with the display mechanism and the control mechanism, and can simultaneously detect two inspection items, namely, the flexibility detection and the elasticity detection of the tungsten wire rope, and the two parts share a set of sensors and feedback systems, so that the structure of the device is simple. The device of the invention makes up for the lack of a detection method and equipment for the flexibility and resilience of the tungsten wire rope, so that the performance detection of the tungsten wire rope is more objective and accurate, and provides data for the quality detection of the tungsten wire rope.

Description

Technical Field

[0001] The present invention relates to the technical field of tungsten wire rope performance detection, and in particular to a tungsten wire rope performance detection device and a detection method thereof. Background Art

[0002] With the rapid development of the solar photovoltaic industry, the single crystal silicon rods of the current photovoltaic industry are growing and gaining weight. The minimum bending radius of the rope body becomes larger after the diameter of the tungsten wire rope becomes thicker. In order to ensure that the tungsten wire rope can be used normally without enlarging the diameter of the single crystal furnace winding wheel, and to avoid the quality problems of crystal shaking and crystal seeding during the growth of single crystal silicon, crystal shaking refers to the crystal shaking phenomenon that occurs in the practice of producing single crystals by the "Czochralski method", referred to as "crystal shaking". Its essence is a form of movement after the growth system is disturbed by some interference. Shaking will cause changes in the microscopic diffusion layer at the moment of growth, resulting in changes in the effective segregation coefficient, leading to radial inhomogeneity of the microscopic dopant concentration distribution. It causes unstable solution convection, changes in the supercooling of the solid-liquid interface, and produces dendrite growth. This greatly affects the stability of crystal growth, single crystal shape, resistivity and micro defects. Improving the flexibility and resilience of the tungsten wire rope used to pull the single crystal silicon rod during the growth of single crystal silicon has become the main technical direction to effectively solve the problems of crystal bias and crystal shaking without modifying the single crystal furnace equipment. At present, the photovoltaic industry is very aware of the importance of the flexibility and resilience of the tungsten wire rope pulling shaft. However, there is currently no method or detection system in the industry that can effectively detect the flexibility and resilience of the tungsten wire rope through data quantification except for direct manual evaluation. Summary of the invention

[0003] In view of the above defects or shortcomings, the object of the present invention is to provide a detection device and a detection method for the flexibility and resilience of tungsten wire rope, which can measure the flexibility and resilience of tungsten wire rope under certain control variable states.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] A device for detecting the performance of a tungsten wire rope comprises: a measuring back plate, a display mechanism, and a control mechanism, wherein an elastic force detection mechanism is installed at one end of the measuring back plate, and a fixing mechanism matched with the elastic force detection mechanism is installed at the other end; a slidable displacement detection mechanism is installed below the elastic force detection mechanism, and a measuring mechanism is installed on the displacement detection mechanism; the elastic force detection mechanism and the measuring mechanism are both connected to the display mechanism and the control mechanism, and when performing detection, one end of the tungsten wire rope is fixed to the elastic force detection mechanism, and the other end is fixed to the fixing mechanism.

[0006] The elastic force detection mechanism includes an elastic force sensor installed on the measuring back plate, and detects the elasticity of the tungsten wire rope after the tungsten wire rope is deformed and rebounds.

[0007] The displacement detection mechanism comprises a slide groove fixedly mounted on the measuring back plate, a push rod is mounted in the slide groove, and a guide wheel is mounted at the front end of the push rod.

[0008] A first limit switch is installed at the rear end of the push rod.

[0009] The measuring mechanism is a grating ruler.

[0010] The fixing mechanism comprises an electric push rod which is perpendicular to the displacement detection mechanism, and a metal clamp for clamping the tungsten wire rope is installed at the end of the electric push rod.

[0011] An electromagnet is installed at the end of the electric push rod, and the metal clamp is adsorbed by the electromagnet to fix the tail of the tungsten wire rope.

[0012] A second limit switch is installed at the rear end of the electric push rod.

[0013] A detection method for a tungsten wire rope performance detection device, comprising:

[0014] 1) Fix one end of the tungsten wire rope through the elastic force detection mechanism, place the other end naturally, and move the displacement detection mechanism to a horizontal fixed position;

[0015] 2) Pull the free end of the tungsten wire rope along the direction, and pull the tungsten wire rope down in the vertical direction to a fixed position on the measuring back plate, so that the tungsten wire rope is bent and deformed;

[0016] 3) Release the tungsten wire rope and allow it to rebound repeatedly without contacting any object. Collect and record the elastic force data through the elastic force sensor of the elastic force detection mechanism to generate a rebound curve. The rebound performance of the tungsten wire rope is evaluated through the number of round trips, round trip cycle, time from the start of rebound to stability, and the peak value data of the rebound curve.

[0017] 4) Connect the free end of the tungsten wire rope to the fixing mechanism so that the tungsten wire rope is in a bent and deformed state;

[0018] 5) Push the displacement detection mechanism to move toward the tungsten wire rope, and the grating ruler records the moving distance. At the same time, the elastic force detection mechanism records the elastic force data;

[0019] 6) Generate a horizontal coordinate of the grating scale displacement and a vertical coordinate of the elastic force after the single-point elastic force sensor is pulled. The flexibility of this section of tungsten wire rope is determined by the elastic force value, stress-strain curve shape, inclination, curvature, and inflection point position data.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The present invention provides a detection device and a detection method for the performance of a tungsten wire rope. Through the ingenious design of an elastic force detection mechanism and a measuring mechanism, two inspection items, namely, flexibility detection and elasticity detection of the tungsten wire rope can be detected simultaneously, and the two parts share a set of sensors and feedback systems, so that the structure of the device is simple, the detection method is convenient, and the operation is easy. The device of the present invention makes up for the lack of a detection method and equipment for the flexibility and resilience of the tungsten wire rope, so that the performance detection of the tungsten wire rope is more objective and accurate, and provides data for the quality detection of the tungsten wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0023] Figure 2 It is a flowchart of the detection method of the present invention.

[0024] In the figure, 1 is a measuring back plate; 2 is an elastic force detection mechanism; 3 is a tungsten wire rope; 4 is an elastic force sensor; 5 is a displacement detection mechanism; 6 is a control mechanism; 7 is a fixing mechanism; 8 is a display mechanism; 51 is a slide groove; 52 is a push rod; 53 is a guide wheel; 54 is a first limit switch; 71 is a second limit switch; 72 is a metal chuck; 73 is an electromagnet. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0026] like Figure 1 As shown, the present invention provides a device for detecting the performance of a tungsten wire rope, comprising: a measuring back plate 1, a display mechanism 8, and a control mechanism 6, wherein an elastic force detection mechanism 2 is installed at one end of the measuring back plate 1, and a fixing mechanism 7 matched with the elastic force detection mechanism 2 is installed at the other end; a slidable displacement detection mechanism 5 is installed below the elastic force detection mechanism 2, and a measuring mechanism 6 is installed on the displacement detection mechanism 5; the elastic force detection mechanism 2 and the measuring mechanism 6 are both connected to the display mechanism 8 and the control mechanism 6, and when performing detection, one end of the tungsten wire rope 3 is fixed to the elastic force detection mechanism 2, and the other end is fixed to the fixing mechanism 7.

[0027] Specifically, the elastic force detection mechanism 2 includes an elastic force sensor 4 installed on the measuring back plate 1, and when the tungsten wire rope 3 is deformed and rebounded, the elasticity of the tungsten wire rope 3 is detected. It should be noted that the elastic force sensor in the present invention is a single-point elastic force sensor.

[0028] In addition, the displacement detection mechanism 5 includes a slide groove 51 fixedly mounted on the measuring back plate 1, a push rod 52 is mounted in the slide groove 51, and a guide wheel 53 is mounted at the front end of the push rod 52. A first limit switch 54 is mounted at the rear end of the push rod 52. The measuring mechanism 6 is a grating ruler. The push rod 52 can slide freely in the horizontal direction, and the horizontal moving distance of the push rod 52 in the slide groove is measured by the grating ruler; the first limit switch 54 is used to control the push rod 52 to send a signal when it moves to a fixed position.

[0029] Furthermore, the fixing mechanism 7 includes an electric push rod perpendicular to the displacement detection mechanism 5, and a metal clamp 72 for clamping the tungsten wire rope 3 is installed at the end of the electric push rod. An electromagnet 73 is installed at the end of the electric push rod. The metal clamp 72 is adsorbed by the electromagnet 73 to fix the tail of the tungsten wire rope 3.

[0030] Used to pull the tungsten wire rope 3; a second limit switch 71 is installed at the rear end of the electric push rod, which is used to control the electric push rod to stop suddenly after receiving the signal from the first limit switch 54.

[0031] The display mechanism 8 is a display screen for displaying stress-strain curves, and the control mechanism 6 includes an instrument control interface.

[0032] The elastic force detection signal of the single-point elastic force sensor and the displacement detection signal of the grating scale are calculated through the circuit and the sensor control system and fed back as a stress-strain curve on the stress-strain curve display screen A. The instrument control interface B is fixed on the back panel and is responsible for the start and stop, data acquisition, zeroing, feedback, calculation and other electronic control processes of the elastic force sensor, grating scale, electric push rod and limit switch.

[0033] like Figure 2 As shown, the present invention also provides a detection method for a tungsten wire rope performance detection device, comprising:

[0034] 1. Elasticity testing process:

[0035] 1. Fix one end of the tungsten wire rope 3 through the elastic force detection mechanism 2, and place the other end naturally, and move the displacement detection mechanism 5 to a horizontal fixed position;

[0036] Specifically, before testing, a fixed length of tungsten wire rope 3 is cut, one end of which is fixed on the fixing mechanism 4, and the other end is placed naturally, and the push rod 52 is moved to a horizontal fixed position (a certain point a) relative to the slide groove 51;

[0037] 2) Pull the free end of the tungsten wire rope 3 along the direction, and pull the tungsten wire rope 3 down in the vertical direction to a fixed position on the measuring back plate 1, so that the tungsten wire rope 3 is bent and deformed;

[0038] A person manually pulls the free end of the tungsten wire rope 3 in the direction, and pulls the tungsten wire rope 3 down in the vertical direction to a fixed position on the back plate, a point b above and below the back plate, to ensure that the tungsten wire rope 3 just touches the guide wheel 53 of the push rod 52 and reaches point a. At this time, the tungsten wire rope 3 with a fixed length and a fixed upper end position produces a large bending deformation, operates the instrument control system, starts the single-point elastic force sensor and grating ruler and returns them to zero, and starts the stress-strain display screen.

[0039] 3. Release the tungsten wire rope 3, so that the tungsten wire rope 3 rebounds naturally and repeatedly without contacting any object. The elastic force sensor 4 of the elastic force detection mechanism 2 collects and records the elastic force data to generate a back-and-forth rebound curve. The rebound performance of the tungsten wire rope section is evaluated by the number of round trips, the round trip cycle, the time from the start of rebound to the stable state, and the peak value data of the rebound curve.

[0040] Among them, the person suddenly releases the tungsten wire rope 3 by hand. After releasing it, it is ensured that the entire free end of the tungsten wire rope 3 rebounds naturally and repeatedly without contacting any object. At this time, the single-point elastic force sensor has begun to collect and record elastic force data, and generates a rebound curve on the stress-strain curve display screen. After the free end stops rebounding and the image is stable, the detection is ended.

[0041] Alternatively, the tungsten wire rope 3 may be fixed by the metal clamp 72, and then after the electromagnet 73 is released, the end of the rope is allowed to oscillate freely, the number of oscillations is detected, and the rope elasticity data is obtained.

[0042] The rebound performance of this section of tungsten wire rope 3 can be evaluated through the data of the round-trip number, round-trip cycle, time from the start of rebound to stability, peak value of the rebound curve generated on the stress-strain display screen. The more round-trip times, the shorter the cycle, the longer the total rebound time, and the larger the peak value, the better the rebound performance.

[0043] 2. Flexibility testing process:

[0044] 4) Connect the free end of the tungsten wire rope 3 to the fixing mechanism 7, so that the tungsten wire rope 3 is in a bent and deformed state;

[0045] Before measurement, cut a fixed length of tungsten wire rope 3, fix one end on the fixing mechanism 4, and fix the other end on the head of the electric push rod after bending it with a large arc. Use the grating ruler to control the push rod 52 to a horizontal fixed position (a certain point c) relative to the slide 51. At this time, it must be ensured that:

[0046] 1. The tungsten wire rope does not contact the guide wheel of the sliding rod. 2. The tungsten wire rope is bent and deformed with a large arc, and the bending radius is much larger than the minimum bending radius of the rope body that will produce plastic deformation. 3. The guide wheel of the sliding rod should be as close to the tungsten wire rope as possible (as close to the right as possible) to ensure that the sliding rod has a large displacement space to the left horizontally.

[0047] Then operate the instrument control system, start the single-point elastic force sensor and grating scale and reset them to zero, start the stress-strain display screen and two limit switches, where the horizontal axis on the stress-strain curve display screen is the displacement of the grating scale, and the vertical axis is the elastic force after the single-point elastic force sensor is pulled.

[0048] 5) Push the displacement detection mechanism 5 to move toward the tungsten wire rope 3, and the grating ruler records the moving distance. At the same time, the elastic force detection mechanism 2 records the elastic force data;

[0049] Operate the instrument control system to control the electric push rod to pull the tungsten wire rope vertically downward. At this time, the display screen will generate a vertical upward straight line; when the tungsten wire rope contacts the guide wheel of the slide bar, the slide bar moves to the left slide groove under the thrust of the tungsten wire rope, and the grating ruler records the displacement change and gives feedback. At this time, the downward straight line on the display screen will become a curve;

[0050] After the push rod 52 continuously moves to the right, when the push rod 52 contacts the first limit switch (the position of the first limit switch is fixed), a signal is immediately sent out. After receiving the signal, the second limit switch controls the electric push rod to stop pulling. At this time, this detection ends. When the electric push rod stops, the display screen curve stops extending synchronously.

[0051] 6) Generate a horizontal coordinate of the grating scale displacement and a vertical coordinate of the elastic force after the single-point elastic force sensor is pulled. The flexibility of this section of tungsten wire rope is determined by the elastic force value, stress-strain curve shape, inclination, curvature, and inflection point position data.

[0052] Read the elastic force value of the single-point elastic force sensor at this time, and judge the flexibility of this section of tungsten wire rope through the elastic force value, stress-strain curve shape, inclination, curvature, inflection point position and other intuitive data. The smaller the elastic force at the end, the better the softness.

[0053] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred embodiments of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still embody the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. A device for detecting the performance of a tungsten wire rope, characterized in that: include: A measuring back plate (1), a display mechanism (8), and a control mechanism (6), wherein an elastic force detection mechanism (2) is installed at one end of the measuring back plate (1), and a fixing mechanism (7) matched with the elastic force detection mechanism (2) is installed at the other end; a slidable displacement detection mechanism (5) is installed below the elastic force detection mechanism (2); the elastic force detection mechanism (2) and the displacement detection mechanism (5) are both connected to the display mechanism (8) and the control mechanism (6); when performing detection, one end of the tungsten wire rope (3) is fixed to the elastic force detection mechanism (2), and the other end is fixed to the fixing mechanism (7) or placed naturally; the elastic force detection mechanism (2) comprises an elastic force sensor (4) installed on the measuring back plate (1), and when the tungsten wire rope (3) is deformed and rebounded, the elasticity of the tungsten wire rope (3) is detected; the free end of the tungsten wire rope (3) is pulled in a direction, and the tungsten wire rope (3) is pulled down in a vertical direction to a fixed position on the measuring back plate (1). , so that the tungsten wire rope (3) is bent and deformed; the fixing mechanism (7) includes an electric push rod perpendicular to the displacement detection mechanism (5), and the end of the electric push rod is installed with a metal clamp (72) for clamping the tungsten wire rope (3); the displacement detection mechanism (5) includes a slide groove (51) fixedly installed on the measurement back plate (1), a push rod (52) is installed in the slide groove (51), and a guide wheel (53) is installed at the front end of the push rod (52); the push rod (52) slides freely in the horizontal direction; the horizontal movement distance of the push rod (52) in the slide groove is measured by a grating ruler; during the elasticity detection process, the elastic force detection mechanism (2) fixes one end of the tungsten wire rope (3) and the other end is naturally placed, so that the tungsten wire rope (3) naturally rebounds repeatedly without contacting any object; during the flexibility detection process, the elastic force detection mechanism (2) fixes one end of the tungsten wire rope (3) and connects the free end of the tungsten wire rope (3) to the fixing mechanism (7).

2. The device for detecting the performance of tungsten wire rope according to claim 1, characterized in that: A first limit switch (54) is installed at the rear end of the push rod (52).

3. The device for detecting the performance of tungsten wire rope according to claim 1, characterized in that: The displacement detection mechanism (5) is provided with a grating ruler to record the displacement of the push rod (52).

4. The device for detecting the performance of tungsten wire rope according to claim 1, characterized in that: An electromagnet (73) is installed at the end of the electric push rod, and the metal clamp (72) is attracted to the electromagnet (73) to fix the tail of the tungsten wire rope (3).

5. The device for detecting the performance of tungsten wire rope according to claim 1, characterized in that: A second limit switch (71) is installed at the rear end of the electric push rod.

6. A detection method for a tungsten wire rope performance detection device according to any one of claims 1 to 5, characterized in that: include: 1) Fix one end of the tungsten wire rope (3) by means of the elastic force detection mechanism (2), and place the other end naturally, and move the displacement detection mechanism (5) to a horizontal fixed position; before testing, cut a tungsten wire rope (3) of a fixed length, fix one end on the fixing mechanism (7), and place the other end naturally, and move the push rod (52) to a horizontal fixed position a relative to the slide groove (51); 2) Pull the free end of the tungsten wire rope (3) along the direction, and pull the tungsten wire rope (3) down in the vertical direction to a fixed position of the measuring back plate (1), so that the tungsten wire rope (3) is bent and deformed; pull the free end of the tungsten wire rope (3) along the direction, and pull the tungsten wire rope (3) down in the vertical direction to a fixed position b of the back plate, ensuring that the tungsten wire rope (3) and the guide wheel (53) of the push rod (52) just contact to reach point a, at this time, the tungsten wire rope (3) with a fixed length and a fixed upper end position is bent and deformed, operate the instrument control system, start the elastic force sensor and the grating ruler and return them to zero, and start the stress and strain display screen; 3) releasing the tungsten wire rope (3) so that the tungsten wire rope (3) naturally rebounds repeatedly without contacting any object, collecting and recording elastic force data through the elastic force sensor (4) of the elastic force detection mechanism (2), generating a reciprocating rebound curve, and evaluating the rebound performance of the tungsten wire rope section through the number of reciprocating times, the reciprocating cycle, the time from the start of rebound to the stable state, and the peak value data of the rebound curve; 4) Connecting the free end of the tungsten wire rope (3) to the fixing mechanism (7) so that the tungsten wire rope (3) is in a bending deformation state; the tungsten wire rope (3) is in a bending deformation with a large arc, and the bending radius is much larger than the minimum bending radius at which the rope body will produce plastic deformation; before measuring, cutting a fixed length of tungsten wire rope (3), fixing one end on the fixing mechanism (7), and fixing the other end on the head of the electric push rod after bending with a large arc, and using a grating ruler to control the push rod (52) to move to a horizontal fixed position point c relative to the slide groove (51); 5) Push the displacement detection mechanism (5) toward the tungsten wire rope (3), and the grating ruler records the moving distance. At the same time, the elastic force detection mechanism (2) records the elastic force data; operate the instrument control system to control the push rod (52) to pull the tungsten wire rope (3) vertically downward, and the display screen will generate a vertical upward straight line; when the tungsten wire rope contacts the guide wheel (53), the push rod (52) is moved toward the left slide groove (51) by the thrust of the tungsten wire rope (3), and the grating ruler records the displacement change and gives feedback, and the downward straight line on the display screen will become a curve; 6) Generate the horizontal coordinate as the displacement of the grating scale and the vertical coordinate as the elastic force after the elastic force sensor is pulled. The flexibility of this section of tungsten wire rope is determined by the elastic force value, stress-strain curve shape, inclination, curvature, and inflection point position data.

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