Graphite resistivity testing device

Abstract

The utility model relates to a graphite resistivity testing device. The problem of poor graphite resistance detection flexibility in the prior art is solved. The device comprises a detection base, one side of the detection base is provided with a vertically arranged detection plate frame, the detection plate frame is connected with an electrode plate assembly through a lifting mechanism, the detection plate frame is provided with a voltage and current detection mechanism connected with the electrode plate assembly, and the detection base is provided with an elastic contact mechanism. And the elastic contact mechanism is connected with a power supply arranged at the bottom of the detection base. The device has the advantages that the operation is convenient, the use flexibility is good, the electric contact point position can be automatically adjusted according to the graphite specification, and the test precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a graphite resistivity testing device. Background Art

[0002] Among the various parameters of graphite electrodes, resistivity is one of the important parameters for evaluating the quality of graphite electrodes. If the resistivity is large, the resistance heat will increase significantly during use, which will accelerate the oxidation of the electrode, increase power consumption and electrode consumption, increase thermal expansion, and may cause electrode breakage. The value of resistivity is related to the product qualification rate, product grade and economic benefits of the factory. Therefore, resistivity index measurement is an important part of the quality inspection of carbon plant electrodes. Accurate and stable measurement results can guide the correction of process parameters in the previous process and accurately locate the electrodes before leaving the factory.

[0003] At present, the connection between the resistivity meter and the electrode is achieved by setting contact plates at both ends of the electrode. Since the flatness of the electrode end surface varies with the wear of the processing tool, the cumulative tolerance of the machine tool and other factors, the end faces of the same batch of products cannot remain consistent, resulting in point contact between the contact plate and the electrode end surface. The contact resistance changes randomly and is extremely unstable, which can easily affect the test results. Secondly, the change of the contact area between the graphite and the electrode will cause the resistance to change, and the existing contact plates all use a unified electrode plate to contact the detected graphite, which makes it difficult to automatically adjust the electrical contact point according to the graphite specifications, and the detection flexibility is poor.

[0004] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a tester for measuring the resistivity of a graphite electrode [CN202023181254.8], which includes a voltage measuring device, a current measuring device, a power supply and a contact plate. The voltage measuring device includes a power supply output voltmeter and a voltage drop voltmeter. The power supply and the current measuring device are connected in series and then connected in parallel with the power supply output voltmeter, and both ends of the parallel connection are in contact with the two ends of the electrode through the contact plate. At least two elastic contacts are provided between the contact plate and the electrode, and the voltage drop voltmeter contacts the side of the electrode through two probes.

[0005] The above solution solves the problem of poor stability of point contact resistance of graphite resistance detection devices in the prior art to a certain extent, but the solution still has many shortcomings, such as: it is difficult to automatically adjust the electrical contact points according to graphite specifications and the detection flexibility is poor. Summary of the invention

[0006] The purpose of the utility model is to provide a graphite resistivity testing device in view of the above problems.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a graphite resistivity testing device, including a detection base, a vertically arranged detection plate frame is provided on one side of the detection base, an electrode plate assembly is connected to the detection plate frame through a lifting mechanism, a voltage and current detection mechanism connected to the electrode plate assembly is provided on the detection plate frame, and an elastic contact mechanism is provided on the detection base, and the elastic contact mechanism is connected to a power supply arranged at the bottom of the detection base.

[0008] In the above-mentioned graphite resistivity testing device, a loading compartment for loading a power supply is provided at the bottom of the detection base, and a power supply socket is provided circumferentially of the detection base. A loading groove for loading an elastic contact mechanism is provided on the detection base.

[0009] In the above-mentioned graphite resistivity testing device, a contact plate is provided in the detection base and located at the lower side of the loading groove. The contact plate is provided with a plurality of conductive contacts arranged in a matrix, and the contact plate is connected to the power supply and the power socket.

[0010] In the above-mentioned graphite resistivity testing device, the elastic contact mechanism includes a sliding positioning cylinder arranged in a loading groove, and a positioning disc seat is provided at the bottom of the sliding positioning cylinder, a sliding conducting rod is provided in the sliding positioning cylinder for lifting and lowering, and an elastic component is provided between the sliding conducting rod and the sliding positioning cylinder.

[0011] In the above-mentioned graphite resistivity testing device, the elastic component includes an elastic member arranged between the sliding conducting rod and the sliding positioning cylinder, the bottom of the elastic member is in contact with the bottom of the positioning disk seat, and the top of the elastic member is provided with a limiting sleeve which is sleeved on the circumferential outer wall of the sliding conducting rod, and the upper end of the limiting sleeve is provided with a limiting disk body, and the diameter of the limiting disk body is larger than the diameter of the sliding positioning cylinder.

[0012] In the above-mentioned graphite resistivity testing device, a contact electrode sheet is provided on the upper end surface of the sliding conductive rod, and the lower end of the sliding conductive rod is penetrated through the bottom of the loading groove and is arranged one-to-one with the above-mentioned conductive contacts.

[0013] In the above-mentioned graphite resistivity testing device, the electrode plate assembly includes an upper electrode plate, and a plurality of elastic electrode regions arranged in a matrix are provided on the lower side of the upper electrode plate, and an electrode contact point is provided in each elastic electrode region.

[0014] In the above-mentioned graphite resistivity testing device, the voltage and current detection mechanism includes a current detection meter and a voltage detection meter arranged on the detection plate frame, the current detection meter and the voltage detection meter are connected in parallel with the upper electrode plate, and an electrical switch is provided between the current detection meter, the voltage detection meter and the upper electrode plate, and the electrical switch is connected to the main switch.

[0015] In the above-mentioned graphite resistivity testing device, the lifting mechanism includes a lifting motor arranged on the back of the detection plate frame, the output end of the lifting motor is connected to a linkage rod, and the detection plate frame is provided with a movable limit groove for the linkage rod to pass through and for limiting the lifting stroke, and one end of the linkage rod is connected to an insulating plate frame connected to the upper electrode plate.

[0016] In the above-mentioned graphite resistivity testing device, a display screen for displaying detection information and a plurality of switch control buttons are provided on the detection base.

[0017] Compared with the existing technology, the advantages of the utility model are: the operation during detection is simpler and more convenient, the displayed results are intuitive and clear, and the voltage contact point can be automatically adjusted according to the specifications of the graphite to be detected, thereby ensuring that the resistivity is accurately tested according to the graphite specifications, reducing the resistance error during the test, having good flexibility of use, high test accuracy, and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the detection base in the utility model;

[0020] Figure 3 It is a schematic diagram of the elastic contact mechanism structure in the utility model;

[0021] Figure 4 It is a schematic diagram of the lifting mechanism structure in the utility model;

[0022] Figure 5 It is a schematic diagram of the end surface structure of the detection base in the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of the electrode plate assembly in the utility model;

[0024] In the figure: detection base 1, loading bin 11, power socket 12, loading groove 13, contact plate 14, conductive contact 15, display screen 16, switch control button 17, detection plate frame 2, lifting mechanism 3, lifting motor 31, linkage rod 32, movable limit groove 33, insulating plate frame 34, electrode plate assembly 4, upper plate 41, elastic electrode area 42, electrode contact point 43, voltage and current detection mechanism 5, current detection meter 51, voltage detection meter 52, electric switch 53, connection main switch 54, elastic contact mechanism 6, sliding positioning cylinder 61, positioning disk seat 62, sliding conduction rod 63, contact electrode sheet 64, power supply 7, elastic assembly 8, elastic member 81, limit sleeve 82, limit disk body 83. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1-6 As shown, a graphite resistivity testing device includes a detection base 1, a detection plate frame 2 is vertically arranged on one side of the detection base 1, an electrode plate assembly 4 is connected to the detection plate frame 2 through a lifting mechanism 3, a voltage and current detection mechanism 5 connected to the electrode plate assembly 4 is arranged on the detection plate frame 2, and an elastic contact mechanism 6 is arranged on the detection base 1, and the elastic contact mechanism 6 is connected to a power supply 7 arranged at the bottom of the detection base 1.

[0027] The upper end surface of the elastic contact mechanism 6 is used for placing the graphite material to be detected, the voltage and current detection mechanism 5 is used for detecting the current and voltage after power is turned on, and the electrode plate assembly 4 is powered by the power supply 7.

[0028] A loading compartment 11 for loading the power supply 7 is provided at the bottom of the detection base 1 , a power supply socket 12 is provided around the detection base 1 , and a loading groove 13 for loading the elastic contact mechanism 6 is provided on the detection base 1 .

[0029] It can be seen that a contact plate 14 is provided in the detection base 1 and at the lower side of the loading groove 13 . A plurality of conductive contacts 15 arranged in a matrix are provided on the contact plate 14 . The contact plate 14 is connected to the power supply 7 and the power socket 12 .

[0030] When the conductive contacts 15 are connected, an electrical circuit is generated, and the voltage and current detection mechanism 5 is used to monitor the total current and total voltage of all electrical circuits.

[0031] Obviously, the elastic contact mechanism 6 includes a sliding positioning cylinder 61 arranged in the loading groove 13, and a positioning disc seat 62 is provided at the bottom of the sliding positioning cylinder 61, a sliding conducting rod 63 is provided in the sliding positioning cylinder 61 for lifting, and an elastic component 8 is provided between the sliding conducting rod 63 and the sliding positioning cylinder 61.

[0032] Furthermore, the elastic component 8 includes an elastic member 81 arranged between the sliding guide rod 63 and the sliding positioning cylinder 61, the bottom of the elastic member 81 contacts the bottom of the positioning disk seat 62, and the top of the elastic member 81 is provided with a limiting sleeve 82 which is sleeved on the circumferential outer wall of the sliding guide rod 63, and the upper end of the limiting sleeve 82 is provided with a limiting disk body 83, and the diameter of the limiting disk body 83 is larger than the diameter of the sliding positioning cylinder 61.

[0033] Furthermore, a contact electrode sheet 64 is disposed on the upper end surface of the sliding conductive rod 63 , and the lower end of the sliding conductive rod 63 is penetrated through the bottom of the loading groove 13 and is disposed one-to-one with the above-mentioned conductive contacts 15 .

[0034] When the graphite material is placed on the contact electrode sheet 64 , the stressed sliding conductive rod 63 overcomes the force of the elastic component 8 and descends, and the bottom contacts the conductive contact 15 to form a loop, while the unstressed sliding conductive rod 63 is separated from the conductive contact 15 .

[0035] Specifically, the electrode plate assembly 4 includes an upper electrode plate 41 , a plurality of elastic electrode regions 42 arranged in a matrix are disposed on the lower side of the upper electrode plate 41 , and an electrode contact point 43 is disposed in each elastic electrode region 42 .

[0036] After the graphite material is placed on the contact electrode sheet 64, the upper electrode plate 41 is driven down by the lifting mechanism 3, and the electrode contact point 43 contacts the upper end of the graphite material, thereby cooperating with the contact electrode sheet 64 to form electrode points at the upper and lower ends of the graphite material.

[0037] More specifically, the voltage and current detection mechanism 5 includes a current detection meter 51 and a voltage detection meter 52 arranged on the detection plate frame 2. The current detection meter 51 and the voltage detection meter 52 are connected in parallel with the upper electrode plate 41, and an electrical switch 53 is provided between the current detection meter 51, the voltage detection meter 52 and the upper electrode plate 41, and the electrical switch 53 is connected to the main switch 54.

[0038] The electric switch 53 is used to open and close the current detection meter 51 and the voltage detection meter 52 respectively, and the main switch 54 is connected to detect the opening and closing of the circuit.

[0039] In detail, the lifting mechanism 3 includes a lifting motor 31 arranged on the back of the detection plate frame 2, the output end of the lifting motor 31 is connected to a linkage rod 32, and the detection plate frame 2 is provided with a movable limit groove 33 for the linkage rod 32 to pass through and for limiting the lifting stroke, and one end of the linkage rod 32 is connected to an insulating plate frame 34 connected to the upper pole plate 41.

[0040] Preferably, the detection base 1 is provided with a display screen 16 for displaying detection information and a plurality of switch control buttons 17 .

[0041] The display screen 16 is used to display the resistivity information, current information and voltage information of the test, and the switch control button 17 includes a voltage access on / off button and a total circuit on / off button.

[0042] In summary, the principle of this embodiment is that during testing, the graphite material to be tested is placed on the contact electrode sheet 64, the bottom of the sliding conductive rod 63 is forced to descend and contact the conductive contact 15, and the lifting mechanism 3 is used to make the electrode contact point 43 contact the upper end of the graphite material. At this time, the voltage is connected to form a loop, and the current and voltage tests are performed using the current detection meter 51 and the voltage detection meter 52 set in the loop, and the resistivity is calculated according to Ohm's law.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0044] Although this article uses more terms such as installation base 1, control host 2, control module 21, timer 22, information display screen 23, control key 24, detection box 3, sealing cover 31, detection chamber 32, ventilation suction machine 33, suction channel 331, air intake part 332, light heating mechanism 4, rectangular loading slot 41, annular heating lamp group 42, halogen lamp group 43, heat dissipation component 5, liquid cooling chamber 51, heat pipe 52, air intake fan 53, air hole 54, air intake channel 55, detection tray assembly 6, tray body 61, buffer connecting rod 62, induction base 63, pressure sensor 64, vibrating screen disc structure 7, vibrator 71, linkage screen rod 72, contact screen plate 73, lifting mechanism 8, lifting cylinder 81, lifting slide 82, sealing structure 9, sealing protrusion 91, sealing groove 92, sealing part 93, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitations interpreted as these terms are contrary to the spirit of the present invention.

Claims

1. A graphite resistivity testing device, comprising a detection base (1), wherein a detection plate frame (2) is vertically arranged on one side of the detection base (1), characterized in that: The detection plate frame (2) is connected to an electrode plate assembly (4) via a lifting mechanism (3); the detection plate frame (2) is provided with a voltage and current detection mechanism (5) connected to the electrode plate assembly (4); and the detection base (1) is provided with an elastic contact mechanism (6); the elastic contact mechanism (6) is connected to a power supply (7) arranged at the bottom of the detection base (1).

2. A graphite resistivity testing device according to claim 1, characterized in that: The bottom of the detection base (1) is provided with a loading compartment (11) for loading a power supply (7), and the detection base (1) is provided with a power supply socket (12) in the circumferential direction. The detection base (1) is provided with a loading groove (13) for loading an elastic contact mechanism (6).

3. A graphite resistivity testing device according to claim 2, characterized in that: A contact plate (14) is provided inside the detection base (1) and at the lower side of the loading groove (13). The contact plate (14) is provided with a plurality of conductive contacts (15) arranged in a matrix, and the contact plate (14) is connected to a power supply (7) and a power supply socket (12).

4. A graphite resistivity testing device according to claim 3, characterized in that: The elastic contact mechanism (6) comprises a sliding positioning cylinder (61) arranged in a loading groove (13), and a positioning disc seat (62) is provided at the bottom of the sliding positioning cylinder (61), a sliding conduction rod (63) is provided in the sliding positioning cylinder (61) for lifting, and an elastic component (8) is provided between the sliding conduction rod (63) and the sliding positioning cylinder (61).

5. A graphite resistivity testing device according to claim 4, characterized in that: The elastic component (8) comprises an elastic member (81) arranged between the sliding conducting rod (63) and the sliding positioning cylinder (61); the bottom of the elastic member (81) contacts the bottom of the positioning disk seat (62); and the top of the elastic member (81) is provided with a limiting sleeve (82) sleeved on the circumferential outer wall of the sliding conducting rod (63); the upper end of the limiting sleeve (82) is provided with a limiting disk body (83) at the top; and the diameter of the limiting disk body (83) is greater than the diameter of the sliding positioning cylinder (61).

6. A graphite resistivity testing device according to claim 4, characterized in that: The upper end surface of the sliding conductive rod (63) is provided with a contact electrode sheet (64), and the lower end of the sliding conductive rod (63) is inserted into the bottom of the loading groove (13) and is arranged one-to-one with the above-mentioned conductive contact (15).

7. A graphite resistivity testing device according to claim 1, characterized in that: The electrode plate assembly (4) comprises an upper electrode plate (41), a plurality of elastic electrode areas (42) arranged in a matrix are provided on the lower side of the upper electrode plate (41), and an electrode contact point (43) is provided in each elastic electrode area (42).

8. A graphite resistivity testing device according to claim 7, characterized in that: The voltage and current detection mechanism (5) comprises a current detection meter (51) and a voltage detection meter (52) arranged on the detection plate frame (2); the current detection meter (51) and the voltage detection meter (52) are connected in parallel with the upper plate (41); and an electric connection switch (53) is provided between the current detection meter (51), the voltage detection meter (52) and the upper plate (41); and the electric connection switch (53) is connected to a main switch (54).

9. A graphite resistivity testing device according to claim 7, characterized in that: The lifting mechanism (3) comprises a lifting motor (31) arranged on the back of the detection plate frame (2); the output end of the lifting motor (31) is connected to a linkage rod (32); and the detection plate frame (2) is provided with a movable limit groove (33) for the linkage rod (32) to pass through and for limiting the lifting stroke; one end of the linkage rod (32) is connected to an insulating plate frame (34) connected to the upper plate (41).

10. A graphite resistivity testing device according to claim 7, characterized in that: The detection base (1) is provided with a display screen (16) for displaying detection information and a plurality of switch control buttons (17).

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