Carbon block resistivity measuring device

Abstract

The utility model discloses a carbon block resistivity measuring device, and belongs to the technical field of resistivity measurement. The carbon block resistivity measurement accuracy can be improved, and meanwhile the carbon block resistivity measurement efficiency is improved. The carbon block resistivity measuring device comprises a first supporting plate and a second supporting plate which are oppositely arranged, a first current-conducting plate is arranged on the side, facing the second supporting plate, of the first supporting plate, a second current-conducting plate is arranged on the side, facing the first supporting plate, of the second supporting plate, and the first current-conducting plate can move relative to the second current-conducting plate. And the carbon block sample is arranged between the first current-conducting plate and the second current-conducting plate. The voltage drop measuring assembly is used for measuring the voltage drop of the carbon block sample, and the laser range finder is used for measuring the diameter of the carbon block sample.

Description

Technical Field

[0001] This application belongs to the field of resistivity measurement technology, and in particular relates to a carbon block resistivity measuring device. Background Technology

[0002] Carbon blocks for aluminum, including cathode carbon blocks and anode carbon blocks, are important raw materials in the aluminum electrolysis industry. Their conductivity directly affects the electrolysis current consumption. Therefore, it is necessary to measure their conductivity before electrolysis. Resistivity is an indicator of the conductivity of carbon blocks for aluminum; the higher the resistivity, the more electrical energy is consumed.

[0003] like Figure 1 As shown, the resistivity of carbon blocks used for aluminum is typically measured by drilling a sample from the carbon block and then machining it into a cylindrical carbon block sample a. The carbon block sample is then placed between two conductive plates b. When current flows through the conductive plates b through the carbon block sample a, two probes c, at a fixed distance, surround the sample at 90 degrees and successively contact the side of the sample in a direction perpendicular to the central axis of the carbon block sample a. The resistivity of the carbon block sample a is calculated based on the average voltage drop between the four probes c, the diameter of the carbon block sample a, the probe distance, and the magnitude of the current flowing through the carbon block sample a.

[0004] In related technologies, the device for measuring the resistivity of carbon blocks used for aluminum requires manual rotation of the carbon block sample a. During rotation, the conductive plate b needs to be separated from the carbon block sample and then re-contacted. This results in the voltage drop of the probe being measured under different current distributions each time, leading to low accuracy in the resistivity measurement of the carbon block sample. Furthermore, the diameter of the carbon block sample needs to be measured using other devices, resulting in low measurement efficiency. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a carbon block resistivity measuring device that can improve the accuracy and efficiency of carbon block resistivity measurement.

[0006] This application provides a carbon block resistivity measuring device, including: a first support plate, a second support plate, a first conductive plate, and a second conductive plate. The first support plate and the second support plate are arranged opposite to each other. The first conductive plate is disposed on the side of the first support plate facing the second support plate, and the second conductive plate is disposed on the side of the second support plate facing the first support plate. The first conductive plate is movable relative to the second conductive plate. A carbon block sample is disposed between the first conductive plate and the second conductive plate, and the central axis of the carbon block sample coincides with the central axis of the first conductive plate and the second conductive plate.

[0007] The carbon block resistivity measuring device further includes a voltage drop measuring component and at least two laser rangefinders. The voltage drop measuring component is disposed on the side of the second support plate facing the first support plate. The voltage drop measuring component includes at least four sets of probe pairs arranged in an array around the central axis of the carbon block sample. Each probe pair includes two probes and can move radially along the carbon block sample. The laser lines of at least two of the laser rangefinders are coplanar with the central axis of the carbon block sample, and the laser lines of at least two of the laser rangefinders coincide.

[0008] In some embodiments, the carbon block resistivity measuring device further includes a first pushing component, which is disposed on the side of the second support plate opposite to the first support plate. The first pushing component can push the second support plate to move closer to the first support plate, thereby causing the second conductive plate to move closer to the first conductive plate.

[0009] In some embodiments, the carbon block resistivity measuring device further includes a base and at least two support rods, the first pushing component is disposed on the side of the base facing the second support plate, one end of the support rod is connected to the base, the other end of the support rod is connected to the first support plate, and the support rod passes through the second support plate to move the second support plate along the centerline axis of the support rod.

[0010] In some embodiments, the laser rangefinder is mounted on the support rod.

[0011] In some embodiments, the base has at least three foot screws on the side facing away from the second support plate.

[0012] In some embodiments, the voltage drop measurement assembly further includes a fixed base, a slide table, and a probe holder. The fixed base is disposed on the side of the second support plate opposite to the first support plate. The probe holder is disposed on the slide table, and the probe pair is disposed on the side of the probe holder. The slide table can slide on the fixed base to drive the probe pair to move radially along the carbon block sample.

[0013] In some embodiments, the probe holder has at least two probe holes on its side, the probe is disposed in the probe hole and can move along the side wall of the probe hole, and a plunger spring is also disposed in the probe hole, one end of the plunger spring is connected to the bottom of the probe hole, and the other end of the plunger spring is connected to the probe.

[0014] In some embodiments, a first insulating block is provided between the first conductive plate and the first support plate, and / or a second insulating block is provided between the second conductive plate and the second support plate.

[0015] In some embodiments, a pressure sensor is provided between the first conductive plate and the first support plate.

[0016] In some embodiments, the carbon block resistivity measuring device further includes a second pushing component, which is disposed on the side of the first support plate opposite to the second support plate. The second pushing component can push the first support plate to move closer to the second support plate, thereby causing the first conductive plate to move closer to the second conductive plate.

[0017] The carbon block resistivity measuring device of this application includes a first support plate and a second support plate arranged opposite to each other. A first conductive plate is disposed on the side of the first support plate facing the second support plate, and a second conductive plate is disposed on the side of the second support plate facing the first support plate. That is, the first and second conductive plates are also arranged opposite to each other, and the first conductive plate is movable relative to the second conductive plate. A carbon block sample is disposed between the first and second conductive plates. A voltage drop measuring component is used to measure the voltage drop of the carbon block sample, and a laser rangefinder is used to measure the diameter of the carbon block sample.

[0018] When measuring the resistivity of a carbon block, the carbon block sample is placed on either a first or second conductive plate. Then, the first or second support plate is moved so that the first conductive plate moves relative to the second conductive plate, ensuring both plates are in contact with the carbon block sample. Current is then applied, allowing current to flow through the sample. Four sets of probes are then moved radially along the carbon block sample until all four probes are in contact with the sample surface, allowing for the measurement of four sets of voltage drop data under the same current distribution. Simultaneously, two laser rangefinders measure the distance to the carbon block sample surface, and the diameter of the sample can be calculated based on the known installation distance between the two rangefinders. Finally, the carbon block resistivity measuring device of this embodiment can obtain the required data in a single measurement, improving both the accuracy and efficiency of carbon block resistivity measurement. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram illustrating the principle of carbon block resistivity measurement.

[0021] Figure 2 This is a schematic perspective view of a carbon block resistivity measuring device provided in an embodiment of this application;

[0022] Figure 3 This is a schematic side view of a carbon block resistivity measuring device provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram showing the distribution of the four probe pairs on the second support plate according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the distribution of four sets of probe pairs on the second support plate, as provided in another embodiment of this application.

[0025] Figure 6 This is a schematic diagram of the distribution of four sets of probe pairs on the second support plate, as provided in another embodiment of this application.

[0026] Figure 7 This is a schematic diagram illustrating the principle of measuring the diameter of a carbon block sample using a laser rangefinder, as provided in an embodiment of this application.

[0027] Figure 8 This is a schematic side view of another carbon block resistivity measuring device provided in the embodiments of this application;

[0028] Figure 9 This is a schematic top view of the support rod provided in the embodiment of this application;

[0029] Figure 10 This is a schematic cross-sectional view of the probe holder provided in an embodiment of this application;

[0030] Figure 11 This is a schematic cross-sectional view of the probe provided in the embodiments of this application;

[0031] Figure 12 This is a schematic installation diagram of the probe and probe holder provided in the embodiments of this application. Detailed Implementation

[0032] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0033] Unless otherwise specified, the length direction in this application refers to the longitudinal direction of the carbon block resistivity measuring device, i.e., the X direction; the width direction refers to the transverse direction of the carbon block resistivity measuring device, i.e., the Y direction; and the height direction refers to the vertical direction of the carbon block resistivity measuring device, i.e., the Z direction.

[0034] Figure 1 This is a schematic diagram illustrating the principle of carbon block resistivity measurement. (For example...) Figure 1As shown, the resistivity of carbon blocks used for aluminum is typically measured by drilling a sample from the carbon block and then machining it into a cylindrical carbon block sample a. The carbon block sample is then placed between two conductive plates b. When current flows through the conductive plates b through the carbon block sample a, two probes c, at a fixed distance, surround the sample at 90 degrees and successively contact the side of the sample in a direction perpendicular to the central axis of the carbon block sample a. The resistivity of the carbon block sample a is calculated based on the average voltage drop between the four probes c, the diameter of the carbon block sample a, the probe distance, and the magnitude of the current flowing through the carbon block sample a.

[0035] In related technologies, the device for measuring the resistivity of carbon blocks used for aluminum requires manual rotation of the carbon block sample a. During rotation, the conductive plate b needs to be separated from the carbon block sample and then re-contacted. This results in a voltage drop in the probe element for each measurement. Figure 1 The V in the middle is not in the same current ( Figure 1 The data obtained from measurements under the I) distribution in the model result in low accuracy of resistivity measurements for carbon block samples. Furthermore, the diameter of the carbon block sample requires the use of additional equipment for measurement, leading to low measurement efficiency.

[0036] In view of this, the present application provides a carbon block resistivity measuring device that can improve the accuracy and efficiency of carbon block resistivity measurement.

[0037] This application provides a carbon block resistivity measuring device. Figure 2 This is a schematic perspective view of a carbon block resistivity measuring device provided in an embodiment of this application. Figure 3 This is a schematic side view of a carbon block resistivity measuring device provided in an embodiment of this application. The carbon block resistivity measuring device includes a first support plate 10 and a second support plate 20 disposed opposite to each other. Both the first support plate 10 and the second support plate 20 can be planar plates supported by insulating material. Since the embodiment of this application designs a control circuit, the first support plate 10 and the second support plate 20 can also have a receiving cavity inside, which is used to accommodate the control circuit.

[0038] A space for accommodating other devices is formed between the first support plate 10 and the second support plate 20. A first conductive plate 11 is disposed on the side of the first support plate 10 facing the second support plate 20. A second conductive plate 21 is disposed on the side of the second support plate facing the first support plate 10. That is, the first conductive plate 11 and the second conductive plate 21 are also arranged opposite each other. A carbon block sample M is disposed between the first conductive plate 11 and the second conductive plate 21.

[0039] Since the first conductive plate 11 can move relative to the second conductive plate 21, and the central axis of the carbon block sample M coincides with the central axes of the first conductive plate 11 and the second conductive plate 21, if the carbon block sample M is placed on the first conductive plate 11, the first conductive plate 11 can move the carbon block sample M until the other end of the carbon block sample M contacts the second conductive plate 21, or the second conductive plate 21 can move towards the first conductive plate 11, which also allows the other end of the carbon block sample M to contact the second conductive plate 21.

[0040] If the carbon block sample M is placed on the second conductive plate 21, the first conductive plate 11 can move the carbon block sample M to the other end of the carbon block sample M and contact the first conductive plate 11, or the first conductive plate 11 can move towards the second conductive plate 21, which can also make the other end of the carbon block sample M contact the first conductive plate 11.

[0041] In this case, the first support plate 10 can drive the first conductive plate 11 to move, or the second support plate 20 can drive the second conductive plate 21 to move, both of which can achieve the movement of the first conductive plate 11 relative to the second conductive plate 21.

[0042] Specifically, such as Figure 2 As shown, the carbon block sample M can be placed on the second conductive plate 21. The second support plate 20 drives the second conductive plate 21 to move, and at the same time drives the carbon block sample M to move. At this time, the first support plate 10 and the first conductive plate 11 are both stationary. This makes the other end of the carbon block sample M contact the first conductive plate 11, so that current is passed through the first conductive plate 11 and the second conductive plate 21 to the carbon block sample M.

[0043] The carbon block resistivity measuring device of this application embodiment also includes a voltage drop measuring component 30. The voltage drop measuring component 30 is disposed on the side of the second support plate 20 facing the first support plate 10. The voltage drop measuring component 30 includes at least four sets of probe pairs 31 arranged in an array around the central axis of the carbon block sample M, wherein the probe pair 31 includes two probes 311.

[0044] like Figure 2 As shown, four sets of probe pairs 31 are arrayed around the central axis of the carbon block sample M. That is, the four sets of probe pairs 31 are distributed around the carbon block sample M. The four sets of probe pairs 31 can be evenly distributed around the carbon block sample M, such as... Figure 4 As shown, the angles between each pair of probes 31 are equal, and the radial distances from probes 31 to the carbon block sample M are equal.

[0045] The four sets of probes can also exhibit a non-uniform distribution structure. For example... Figure 5 As shown, the angles between any two probe pairs at 31 are not exactly equal. Figure 6As shown, the radial distances from the four sets of probes 31 to the carbon block sample M are not completely equal. This application does not impose restrictions on the distribution structure of the four sets of probes 31. It should be noted that... Figures 4 to 6 This is a simplified diagram showing the distribution of probe pairs.

[0046] The probe pair 31 can move radially along the carbon block sample M. That is, the two probes 311 can move radially along the carbon block sample M until the ends of the probes 311 contact the carbon block sample M, thus achieving the purpose of measuring the voltage drop of the carbon block sample M. Since the four probe pairs 31 contact the carbon block sample M simultaneously, the four sets of voltage drop data are measured simultaneously. Therefore, the four sets of voltage drop data are measured under the same current distribution, thereby improving the accuracy of carbon block resistivity measurement.

[0047] The carbon block resistivity measuring device of this application embodiment further includes at least two laser rangefinders 40. Taking two laser rangefinders 40 as an example, the laser lines of the two laser rangefinders 40 are coplanar with the central axis of the carbon block sample M, and the laser lines of the two laser rangefinders 40 coincide.

[0048] Figure 7 This is a schematic diagram illustrating the principle of measuring the diameter of a carbon block sample using a laser rangefinder provided in this application embodiment. The laser lines of both laser rangefinders 40 are coplanar with the central axis of the carbon block sample M. That is, the laser lines of both laser rangefinders 40 pass through the central axis of the carbon block sample M, and the laser lines of the two laser rangefinders 40 coincide. The distance measured by the two laser rangefinders 40, plus the diameter of the carbon block sample M, is the installation distance between the two laser rangefinders 40. Since the installation distance between the two laser rangefinders 40 is a known distance, subtracting the distance measured by the two laser rangefinders 40 from the installation distance yields the diameter of the carbon block sample M.

[0049] It should be noted that during the movement of the carbon block sample M, the two laser rangefinders 40 can continuously measure the distance to the carbon block sample M, thus obtaining multiple distances measured by the two laser rangefinders 40. Therefore, the average distance measured by the two laser rangefinders 40 can be obtained. Using this average distance to calculate the diameter of the carbon block sample M can improve the accuracy of the diameter measurement of the carbon block sample M, and ultimately improve the accuracy of the carbon block resistivity measurement.

[0050] The carbon block resistivity measuring device of this application includes a first support plate 10 and a second support plate 20 arranged opposite to each other. A first conductive plate 11 is disposed on the side of the first support plate 10 facing the second support plate 20, and a second conductive plate 21 is disposed on the side of the second support plate 20 facing the first support plate 10. That is, the first conductive plate 11 and the second conductive plate 21 are also arranged opposite to each other. A carbon block sample M is disposed between the first conductive plate 11 and the second conductive plate 21. A voltage drop measuring component 30 is used to measure the voltage drop of the carbon block sample M, and a laser rangefinder 40 is used to measure the diameter of the carbon block sample M.

[0051] When measuring the resistivity of a carbon block, the carbon block sample M is placed on the first conductive plate 11 or the second conductive plate 21. Then, the first support plate 10 or the second support plate 20 is moved so that the first conductive plate 11 moves relative to the second conductive plate 21, thereby making both the first conductive plate 11 and the second conductive plate 21 contact the carbon block sample M. After energizing, current flows through the carbon block sample M. Then, four sets of probe pairs 31 are moved radially along the carbon block sample M until all four sets of probe pairs 31 are in contact with the surface of the carbon block sample, allowing four sets of voltage drop data to be measured under the same current distribution. Simultaneously, two laser rangefinders 31 can measure the distance to the surface of the carbon block sample M. Based on the known installation distance of the two laser rangefinders 31, the diameter of the carbon block sample M can be calculated. Finally, using the carbon block resistivity measuring device of this embodiment, the required data can be measured in one measurement, which can improve the accuracy and efficiency of carbon block resistivity measurement.

[0052] In some embodiments, the carbon block resistivity measuring device further includes a first pushing component 50, which is disposed on the side of the second support plate 20 facing away from the first support plate 10. The first pushing component 50 can push the second support plate 20 to move closer to the first support plate 10, thereby causing the second conductive plate 21 to move closer to the first conductive plate 10.

[0053] like Figure 2 and Figure 3 As shown, the first pushing assembly 50 is disposed at the bottom of the second support plate 20. The first pushing assembly 50 may include a hydraulic cylinder and a push rod. The push rod has a telescopic part, one end of which is connected to the hydraulic cylinder, and the other end of which is connected to the bottom of the second support plate 20. The hydraulic cylinder can drive the telescopic part of the push rod to extend or retract, thereby causing the second support plate 20 to move along the Z direction. At this time, both the first support plate 10 and the first conductive plate 11 are stationary. The second support plate 20 can then move along the Z direction along with the second conductive plate 21.

[0054] like Figure 3As shown, the carbon block sample M is placed on the second conductive plate 21, with the other end of the carbon block sample M not in contact with the first conductive plate 11. When it is necessary to measure the resistivity of the carbon block sample M, the first pushing assembly 50 is activated. The push rod of the first pushing assembly 50 pushes the second support plate 20 to move along the Z direction toward the first support plate 10. At the same time, it moves the carbon block sample M toward the first conductive plate 11. Until the carbon block sample M contacts the first conductive plate 11, the first pushing assembly 50 stops operating, finally forming as shown. Figure 8 The state shown.

[0055] exist Figure 8 After the resistivity measurement of the carbon block sample M is completed in the state shown, the first pushing component 50 can drive the second support plate 20 to move away from the first support plate 10 along the Z direction, and at the same time drive the carbon block sample M away from the first conductive plate 11, that is, the carbon block sample M separates from the first conductive plate 11, and finally returns to the state shown. Figure 3 The state shown.

[0056] In some embodiments, the carbon block resistivity measuring device further includes a base 60 and at least two support rods 61. The structure of the support rods 61 is as follows: Figure 9 As shown, the two ends of the support rod 61 can be threaded respectively, and are fixedly connected to the base 60 and the first support plate 10 by threaded bolts. The support rod 61 is a smooth support rod, and the second support plate 20 can move up and down (in the Z direction) along the support rod 61.

[0057] The first pushing assembly 50 is disposed on the side of the base 60 facing the second support plate 20. One end of the support rod 61 is connected to the base 60, and the other end of the support rod 61 is connected to the first support plate 10. The support rod 61 passes through the second support plate 20, so that the second support plate 20 can move along the central axis of the support rod. The two support rods 61 not only support the first support plate 10, but also restrict the movement path of the second support plate 20, so that the second support plate 20 does not deviate during movement. Ultimately, the central axis of the carbon block sample M always coincides with the central axis of the first conductive plate 11, further improving the accuracy of carbon block resistivity measurement.

[0058] In some embodiments, the laser rangefinder 40 may be mounted on the support rod 61. For example... Figure 2 and Figure 3 As shown, two laser rangefinders 40 are respectively mounted on two support rods 61. The two laser rangefinders 40 can be fixedly mounted on the two support rods 61 via connectors. Since the central axes of the two support rods 61 are coplanar with the central axis of the carbon sample M, by aligning the laser beam exit of the laser rangefinder 40 with the center of the carbon sample M, a simple structure can achieve coplanarity between the laser beam of the laser rangefinder 40 and the central axis of the carbon sample M, and simultaneously achieve overlap of the laser beams of the two laser rangefinders 40.

[0059] In some implementations, such as Figure 2 and Figure 3 As shown, at least three leveling screws 62 are provided on the side of the base 60 facing away from the second support plate 20. The levelness of the entire carbon block resistivity measuring device can be adjusted by the at least three leveling screws 62. Specifically, a bubble can be provided on the upper surface of the base 60 to detect the levelness. By adjusting the height of the leveling screws 62, the bubble on the upper surface of the base 60 moves to the exact center of the base 60, indicating that the levelness of the entire carbon block resistivity measuring device is good at this time.

[0060] A bubble can also be set on the upper surface of the second support plate 20 to detect the levelness. By adjusting the height of the foot screw 62, the bubble on the upper surface of the second support plate 20 moves to the center of the second support plate 20, indicating that the levelness of the second support plate 20 is good at this time.

[0061] In some implementations, such as Figure 2 As shown, the voltage drop measurement assembly 30 also includes a fixed base 32, a slide 33, and a probe holder 34. The fixed base 32 is disposed on the side of the second support plate 20 facing away from the first support plate 10. The slide 33 is disposed on the fixed base 32 and can slide on the fixed base 32. The probe holder 34 is disposed on the slide 33, and the probe pair 31 is disposed on the side of the probe holder 34. When the slide 33 slides on the fixed base 32, it drives the probe pair 31 to move radially along the carbon block sample M.

[0062] All four voltage drop measurement components 30 can adopt the above-described structure, allowing the probe 311 to contact the surface of the carbon block sample M and complete the measurement of the voltage drop of the carbon block sample M. Since the measured voltage drop is under the same current condition, the final carbon block resistivity is more accurate. It should be noted that other structures can also be used in this embodiment to achieve contact between the probe 311 and the surface of the carbon block sample M.

[0063] For example, an electromagnetic spring structure can be used to attract the probe holder 34. One end of the spring is connected to an electromagnetic block, and the other end is connected to the probe holder 34. When voltage drop needs to be measured, the electromagnetic block is not energized, the spring is in an extended state, and the probe 311 is pushed to contact the surface of the carbon block sample M. When voltage drop does not need to be measured, the electromagnetic block is energized, the spring is in a compressed state, and the probe 311 is pulled away from contacting the surface of the carbon block sample M.

[0064] In some implementations, such as Figures 9 to 11As shown, the probe holder 34 has at least two probe holes 341 on its side. The probe 311 is disposed within the probe hole 341 and can move along the side wall of the probe hole 341. A plunger spring (not shown in the figure) is also disposed within the probe hole 341. One end of the plunger spring is connected to the bottom of the probe hole 341, and the other end of the plunger spring is connected to the probe 311. In this way, when the probe 311 contacts the surface of the carbon block sample M, the plunger spring forms a clamping force, which avoids poor contact between the probe 311 and the carbon block sample M, and further improves the accuracy of the carbon block resistivity measurement.

[0065] In some implementations, such as Figure 3 As shown, a first insulating block 12 is provided between the first conductive plate 11 and the first support plate 10, and / or a second insulating block 22 is provided between the second conductive plate 21 and the second support plate 20. This can prevent external current from affecting the first conductive plate 11 and the second conductive plate 21, ensure the accuracy of the current data flowing through the carbon block sample M, and further improve the accuracy of carbon block resistivity measurement.

[0066] In some embodiments, a pressure sensor (not shown) is provided between the first conductive plate 11 and the first support plate 10. As the second support plate 20 moves the carbon block sample M towards the first conductive plate 11, the pressure sensor detects a pressure value after the upper end of the carbon block sample M contacts the first conductive plate 11. When the pressure value reaches a pressure threshold, the second support plate 20 is controlled to stop moving. This facilitates control of the movement of the second support plate 20.

[0067] In some embodiments, the carbon block resistivity measuring device may further include a second pushing component (not shown in the figure). The second pushing component is disposed on the side of the first support plate 10 facing away from the second support plate 20. The second pushing component can push the first support plate 10 to move closer to the second support plate 20, thereby causing the first conductive plate 11 to move closer to the second conductive plate 21. That is, the carbon block sample M can remain stationary, and the second pushing component can drive the first support plate 10 and the first conductive plate 11 to move towards the carbon block sample M. Alternatively, the first support plate 10 and the second support plate 20 can move towards each other simultaneously, thereby improving the measurement efficiency of the carbon block resistivity.

[0068] like Figure 2 and Figure 3 As shown in the figure, this embodiment of the application also includes a control cabinet 70, which is equipped with a control panel 71 and a processor (not shown in the figure). Testers can input test-related data through the control panel 71, such as the pressure threshold of the pressure sensor. Test results can also be directly displayed through the control panel 71.

[0069] The processor is electrically connected to the first driving component 50, the voltage drop measuring component 30, the laser rangefinder 40, and other devices to control these devices.

[0070] Specifically, after the tester inputs the start measurement command through the control panel 71, the processor receives the start measurement command and first generates a control signal based on the start measurement command, which is then sent to the drive device corresponding to the first push component 50. The drive device corresponding to the first push component 50 drives the first push component 50 to operate according to the control signal, and the first push component 50 pushes the second support plate 20 towards the first support plate 10.

[0071] After the upper end of the carbon block sample M contacts the first conductive plate 11, the pressure sensor detects the pressure value and continuously feeds back the detected pressure value to the processor. When the processor determines that the pressure value has reached the pressure threshold, the processor sends a stop signal to the drive device corresponding to the first push assembly 50. The drive device corresponding to the first push assembly 50 stops driving the first push assembly 50 according to the stop signal. The first push assembly 50 stops pushing the second support plate 20 towards the first support plate 10.

[0072] While the first pushing component 50 pushes the second support plate 20 towards the first support plate 10, the processor sends a start signal to the driving device of the laser rangefinder 40. Based on the start signal, the driving device of the laser rangefinder 40 sends a laser line to the carbon block sample M, measuring the distances s1 and s2 to the carbon block sample M respectively. Based on the pre-stored installation distance S between the two laser rangefinders 40, the diameter D of the carbon block sample M can be obtained as D = S - (s1 + s).

[0073] After the first pushing component 50 stops pushing the second support plate 20 towards the first support plate 10, the processor sends a start signal to the voltage drop measurement component 30. The driving device of the voltage drop measurement component 30 (e.g., a motor and rack and pinion mechanism) drives the slide 33 to move radially along the carbon block sample M until the probe 311 contacts the surface of the carbon block sample M. This can be determined by detecting a voltage signal to confirm that the probe 311 has contacted the surface of the carbon block sample M. After receiving the voltage signal, the processor sends a stop signal to the driving device corresponding to the voltage drop measurement component 30. Based on the stop signal, the driving device corresponding to the voltage drop measurement component 30 stops driving the voltage drop measurement component 30. The slide 33 stops moving radially along the carbon block sample M.

[0074] After probe 311 contacts the surface of carbon block sample M, it sends the four sets of voltage drop data to the processor. The processor can calculate the resistivity of the carbon block based on the current data between the first conductive plate 11 and the second conductive plate 21, the four sets of voltage drop data, and the diameter of the carbon block sample M.

[0075] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0076] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0077] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0078] In the description of this application, "multiple" means two or more.

[0079] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0080] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A carbon block resistivity measuring device, characterized in that, include: A first support plate, a second support plate, a first conductive plate, and a second conductive plate are provided. The first support plate and the second support plate are arranged opposite to each other. The first conductive plate is located on the side of the first support plate facing the second support plate, and the second conductive plate is located on the side of the second support plate facing the first support plate. The first conductive plate is movable relative to the second conductive plate. A carbon block sample is placed between the first conductive plate and the second conductive plate. The central axis of the carbon block sample coincides with the central axis of the first conductive plate and the second conductive plate. The carbon block resistivity measuring device further includes a voltage drop measuring component and at least two laser rangefinders. The voltage drop measuring component is disposed on the side of the second support plate facing the first support plate. The voltage drop measuring component includes at least four sets of probe pairs arranged in an array around the central axis of the carbon block sample. Each probe pair includes two probes and can move radially along the carbon block sample. The laser lines of at least two of the laser rangefinders are coplanar with the central axis of the carbon block sample, and the laser lines of at least two of the laser rangefinders coincide.

2. The carbon block resistivity measuring device according to claim 1, characterized in that, The carbon block resistivity measuring device further includes a first pushing component, which is disposed on the side of the second support plate opposite to the first support plate. The first pushing component can push the second support plate to move closer to the first support plate, so as to drive the second conductive plate to move closer to the first conductive plate.

3. The carbon block resistivity measuring device according to claim 2, characterized in that, The carbon block resistivity measuring device further includes a base and at least two support rods. The first pushing component is disposed on the side of the base facing the second support plate. One end of the support rod is connected to the base, and the other end of the support rod is connected to the first support plate. The support rod passes through the second support plate so that the second support plate can move along the centerline axis of the support rod.

4. The carbon block resistivity measuring device according to claim 3, characterized in that, The laser rangefinder is mounted on the support rod.

5. The carbon block resistivity measuring device according to claim 3, characterized in that, The base has at least three foot screws on the side facing away from the second support plate.

6. The carbon block resistivity measuring device according to claim 2, characterized in that, The voltage drop measurement assembly further includes a fixed base, a slide table, and a probe holder. The fixed base is disposed on the side of the second support plate facing away from the first support plate. The probe holder is disposed on the slide table, and the probe pair is disposed on the side of the probe holder. The slide table can slide on the fixed base to drive the probe pair to move radially along the carbon block sample.

7. The carbon block resistivity measuring device according to claim 6, characterized in that, The probe holder has at least two probe holes on its side. The probe is disposed in the probe hole and can move along the side wall of the probe hole. A plunger spring is also disposed in the probe hole. One end of the plunger spring is connected to the bottom of the probe hole, and the other end of the plunger spring is connected to the probe.

8. The carbon block resistivity measuring device according to claim 2, characterized in that, A first insulating block is provided between the first conductive plate and the first support plate, and / or a second insulating block is provided between the second conductive plate and the second support plate.

9. The carbon block resistivity measuring device according to claim 2, characterized in that, A pressure sensor is provided between the first conductive plate and the first support plate.

10. The carbon block resistivity measuring device according to claim 1, characterized in that, The carbon block resistivity measuring device further includes a second pushing component, which is disposed on the side of the first support plate opposite to the second support plate. The second pushing component can push the first support plate to move closer to the second support plate, thereby causing the first conductive plate to move closer to the second conductive plate.

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