A graphite electrode detection device

Abstract

The present application relates to the technical field of graphite electrode detection, and discloses a graphite electrode detection device, which comprises a machining table for synchronously machining internal threads at two ends of a graphite electrode, a clamping seat for positioning the graphite electrode is arranged on the machining table, a detachable mounting seat is arranged on the clamping seat, a swing arm is rotatably arranged on the mounting seat, a plurality of reference arc blocks with equal arc degrees of graphite electrodes with different diameters are arranged, the reference arc blocks are detachably connected with the arc-shaped seat, and the axes of the reference arc blocks and the arc-shaped seat are coaxially arranged after being connected, a rotating cylinder is rotatably arranged on the adjusting cylinder, and a detection assembly for detecting the flatness of the end of the graphite electrode is arranged on the rotating cylinder. The flatness of the end of the graphite electrode after machining can be effectively detected on the machining table, so that the process requirements of detection and the dependence on a special operation table can be reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of graphite electrode detection technology, specifically to a graphite electrode detection device. Background Technology

[0002] Graphite electrodes are high-temperature resistant graphitic conductive materials made from aggregates such as petroleum coke and needle coke, and coal tar pitch as a binder, through a series of processes including calcination, batching, mixing, molding, roasting, graphitization, and machining. In an electric arc furnace, the graphite electrode serves as a conductive element. Clamped by electrode arms, a high-temperature electric arc is generated between the electrode and the scrap steel, using the heat of the arc to melt the scrap steel.

[0003] When using graphite electrodes in an electric arc furnace, multiple electrodes need to be joined together to ensure the required length. This joining is achieved through the threaded holes and external threaded connectors at both ends of the graphite electrode. To ensure the actual contact area between adjacent electrode ends during use and achieve good conductivity, the flatness of the electrode ends needs to be tested. Current methods involve first placing the graphite electrode on a processing table using a sampling hoisting method, then simultaneously machining the internal threaded holes at both ends. After machining, the electrode is then hoisted onto a dedicated operating table capable of rotating around its axis. A dial indicator probe is then placed against the end face of the graphite electrode, and the electrode is rotated. During rotation, the dial indicator reading is observed to ensure it remains within a specified range, thus determining if the flatness of the electrode ends is acceptable.

[0004] The aforementioned method of inspecting the flatness of graphite electrodes requires the use of hoisting to reposition the processed graphite electrodes, and the inspection process also relies on a dedicated operating table. Therefore, there is an urgent need to design a device that can inspect the flatness of the graphite electrode ends on a processing table, thereby reducing the inspection process requirements and the dependence on a dedicated operating table. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned difficulties and provide a device that can directly detect the flatness of the end of a graphite electrode on a processing table.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a graphite electrode detection device, comprising a processing table for simultaneously machining internal threads at both ends of a graphite electrode, a clamping seat for positioning the graphite electrode on the processing table, a detachable mounting seat on the clamping seat, a swing arm rotatably mounted on the mounting seat, a lifting seat vertically sliding at the end of the swing arm, an arc-shaped seat mounted on the lifting seat, and an adjusting cylinder laterally sliding on the lifting seat that coincides with the arc surface axis of the arc-shaped seat, and further comprising a plurality of reference arc-shaped blocks, each having an arc radius equal to that of graphite electrodes of different diameters, wherein the reference arc-shaped blocks are detachably connected to the arc-shaped seats and their axes are aligned after connection;

[0007] The regulating cylinder is equipped with a damped rotating cylinder, the rotating cylinder is equipped with a connecting seat, and a telescopic moving seat is provided on the connecting seat. The moving seat is equipped with a detection component for detecting the flatness of the graphite electrode end, and a fixing component is provided on the swing arm to fix itself to the mounting base.

[0008] As an improvement, the detection assembly includes a fixed seat mounted on a movable seat, a slide rod that slides through the fixed seat and has a spring-loaded function, a seat body on the slide rod and a ball bearing that rotates on the seat body, and a lever dial indicator on the fixed seat, with the probe of the lever dial indicator abutting against the slide rod.

[0009] As an improvement, the seat is provided with a raceway seat for the ball to rotate, the raceway seat including a left raceway seat and a right raceway seat that are used in conjunction with each other and detachably connected to the seat.

[0010] As an improvement, the slide rod is provided with a baffle, and a return spring is sleeved on the slide rod between the baffle and the fixed seat. A groove is opened at the end of the slide rod, and a mating block is provided at the center of the groove to abut against the probe of the lever dial indicator.

[0011] As an improvement, the adjusting cylinder is provided with an outwardly extending protrusion and a sliding abutment seat that abuts against the end of the rotating cylinder. A compression spring is provided between the protrusion and the abutment seat. A limiting seat that abuts against the other end of the rotating cylinder is detachably provided on the end of the adjusting cylinder away from the protrusion.

[0012] As an improvement, the lifting seat is threaded with an adjusting screw that rotates with the boss, and a guide rod that slides with the lifting seat is also fixed on the boss.

[0013] As an improvement, the fixing component includes a cavity formed on the swing arm, a positioning pin slidably passing through the cavity, a pressure plate on the positioning pin, a return spring II sleeved on the positioning pin between the pressure plate and the top wall of the cavity, and pin holes for the positioning pin to be inserted symmetrically at both ends of the mounting base.

[0014] As an improvement, a transition seat is provided between the lifting seat and the arc-shaped seat to fix the two together. An adjusting screw is threaded through the swing arm and rotates with the transition seat. A guide rod is also fixed on the arc-shaped seat and slides with the swing arm.

[0015] The advantages of this invention compared to the prior art are as follows:

[0016] 1. With the combined action of the mounting base, swing arm, lifting base, adjusting cylinder, rotating cylinder and detection component, the mounting base is first fixedly connected to the clamping base. Then, the operator rotates the rotating cylinder, which drives the detection component to rotate on the end face of the stationary graphite electrode to achieve the detection function. This allows for effective detection of the flatness of the graphite electrode end after processing on the processing table, which reduces the requirements of the detection process and the dependence on the special operating table.

[0017] 2. With the help of the sliding rod, ball bearing, and lever dial indicator, the ball bearing is able to abut against the end face of the graphite electrode during testing. As the ball bearing rotates in the circumferential direction of the graphite electrode, when it comes into contact with an uneven area, it will drive the sliding rod to slide back and forth. The sliding motion of the sliding rod is then transmitted to the probe of the lever dial indicator. By observing whether the pointer change of the dial indicator is within the specified range, it can be determined whether the flatness of the end of the graphite electrode is qualified.

[0018] 3. The rotatable swing arm can be used to perform sequential testing on the flat ends of the graphite electrode by adjusting the rotation of the swing arm in a single connection with the mounting base, thereby improving the ease of operation of this device.

[0019] 4. With the addition of multiple detachable reference arc blocks of different specifications, as well as arc seats and adjusting cylinders, the reference arc seats can be selected and connected according to graphite electrodes of different diameters. Then, the reference arc seats are slid down and abut against the outer wall of the graphite electrode. This ensures that the axis of the adjusting cylinder coincides with the axis of the graphite electrode, thereby meeting the flatness detection requirements of the ends of graphite electrodes of different diameters and improving the application range of this device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure when the present invention is used. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure when the present invention is used. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the structure of the present invention.

[0023] Figure 4This is a schematic diagram of the detection component in this invention. Figure 1 .

[0024] Figure 5 This is the present invention. Figure 4 Enlarged view of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the detection component in this invention. Figure 2 .

[0026] Figure 7 This is an internal structural diagram of the cooperation between the adjusting cylinder and the rotating cylinder in this invention.

[0027] Figure 8 This is an internal structural diagram of the fixing component in this invention.

[0028] Figure 9 This is a schematic diagram of the structure of the arc-shaped seat and the reference arc-shaped block in this invention.

[0029] As shown in the figure: 1. Processing table; 111. Clamping seat; 211. Mounting seat; 212. Swing arm; 213. Lifting seat; 214. Arc-shaped seat; 215. Adjusting cylinder; 216. Reference arc-shaped block; 217. Rotating cylinder; 218. Connecting seat; 219. Moving seat; 220. Transition seat; 221. Adjusting screw two; 222. Guide rod two; 3. Detection assembly; 311. Fixed seat; 312. Slide rod; 313. Seat body; 314. Ball bearing; 315. Lever 316. Dial indicator; 317. Raceway seat; 318. Left raceway seat; 319. Right raceway seat; 320. Baffle; 321. Return spring one; 322. Groove; 323. Mating block; 4. Fixing assembly; 411. Cavity; 412. Positioning pin; 413. Pressure plate; 414. Return spring two; 415. Pin hole; 511. Plug; 512. Abutment seat; 513. Compression spring; 514. Limit seat; 6. Graphite electrode; 7. Adjusting screw one; 8. Guide rod one. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] To ensure the mating requirements of graphite electrodes, drilling and internal threading are required at both ends during machining. This application primarily addresses the design of a device that can directly inspect the flatness of the graphite electrode ends on a machining table after internal threading at both ends. The embodiments of this application provide the following technical solutions:

[0032] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 9As shown, a graphite electrode testing device includes a processing table 1 for simultaneously machining internal threads at both ends of a graphite electrode 6. The processing table 1 is provided with a clamping seat 111 for positioning the graphite electrode 6. The clamping seat 111 moves up and down by electric cylinders that move synchronously at both ends, and the two electric cylinders are slidably arranged on the processing table 1. The up and down movement of the clamping seat 111 is used to release or position the graphite electrode 6. The above features belong to the prior art.

[0033] The clamping seat 111 is provided with a detachable mounting seat 211. Positioning rods are located at the four corners of the bottom surface of the mounting seat 211. Positioning holes are provided on the clamping seat 111 for the positioning rods to extend into. When connecting the mounting seat 211, the two are first pre-positioned by the cooperation of the positioning rods and the positioning holes, and then fixedly connected by bolts using existing technology. A swing arm 212 is rotatably mounted on the mounting seat 211. A lifting seat 213 is vertically slidable at the end of the swing arm 212, and an arc-shaped seat 214 is provided on this lifting seat 213. The lowering seat 213 is laterally slidably provided with an adjusting cylinder 215 that coincides with the arc surface axis of the arc seat 214. In order to make the axis of the adjusting cylinder 215 coincide with the axis of the graphite electrodes 6 of different diameters after the lowering seat 213 is slidably adjusted, it also includes a plurality of reference arc blocks 216 that are equal in curvature to the graphite electrodes 6 of different diameters. The reference arc blocks 216 are detachably connected to the arc seat 214 and their axes are coincident after connection. The detachable connection between the reference arc blocks 216 and the arc seat 214 is achieved by the cooperation of a slot and a block.

[0034] The adjusting cylinder 215 is equipped with a damped rotating cylinder 217. The rotating cylinder 217 is equipped with a connecting seat 218, and a telescopic moving seat 219 is provided on the connecting seat 218. The moving seat 219 and the connecting seat 218 are connected by a sliding groove and a slider, and are also positioned by a positioning bolt. The moving seat 219 is equipped with a detection component 3 for detecting the flatness of the end of the graphite electrode 6. The telescopic setting of the moving seat 219 on the connecting seat 218 can adjust the radial position of the detection component 3 at the end of the graphite electrode 6. The swing arm 212 is equipped with a fixing component 4 for fixing itself to the mounting base 211.

[0035] With the above structure, firstly, the clamping seat 111 is moved to one side, then the graphite electrode 6 to be processed is hoisted onto the processing table 1. Next, the clamping seat 111 is moved to the middle of the graphite electrode 6, and the clamping seat 111 is moved downward to position the graphite electrode. Then, the two ends of the graphite electrode are simultaneously threaded. After processing, the reference arc block 216 is selected according to the different diameters of the graphite electrode 6. Then, the reference arc block 216 is installed on the arc seat 214. Then, the mounting seat 211 is connected to the clamping seat 111, and the lifting seat 213 is controlled to slide downward. At this time, the arc seat 214 and the reference arc block 216 are aligned. The arc-shaped block 216 and the adjusting cylinder 215 will also slide downwards, so that the inner wall of the reference arc-shaped block 216 abuts against the outer wall of the graphite electrode 6. At this time, the axis of the reference arc-shaped block 216 will coincide with the axis of the graphite electrode 6, and the axes of the arc-shaped seat 214 and the adjusting cylinder 215 will also coincide with the axis of the graphite electrode 6. The operator first slides the adjusting cylinder 215 so that the detection component 3 abuts against the end of the graphite electrode 6, and then manually rotates the rotating cylinder 217. At the same time, it will drive the detection component 3 to rotate in the circumferential direction at the end of the graphite electrode 6, thereby detecting the flatness of one end of the graphite electrode 6.

[0036] After the inspection is completed, first move the sliding adjustment cylinder 215 away from the end of the graphite electrode 6, then move the lifting seat 213 upward, then release the positioning of the swing arm 212, and rotate the swing arm 212 180 degrees to adjust it so that the inspection component 3 rotates to the other end of the graphite electrode 6. Repeat the above operation steps to inspect the flatness of the other end of the graphite electrode 6. This allows for effective inspection of the flatness of the end of the processed graphite electrode 6 on the processing table 1, which reduces the inspection process requirements and the dependence on a dedicated operating table.

[0037] Combined with appendix Figure 4 Appendix Figure 5 and attached Figure 6As shown, the detection component 3 includes a fixed base 311 mounted on a movable base 219. A sliding rod 312 with a spring-loaded function is slidably inserted through the fixed base 311. The movable base 219 has a clearance groove through which the sliding rod 312 passes. A seat 313 is provided on the sliding rod 312, and a ball bearing 314 is rotatably mounted on the seat 313. A raceway seat 316 for the ball bearing 314 to rotate is provided on the seat 313. The raceway seat 316 includes components that cooperate with each other. The left raceway seat 317 and the right raceway seat 318 are detachably connected to the seat 313. The detachable connection of the left raceway seat 317 and the right raceway seat 318 ensures the installation requirements of the ball 314. The fixed seat 311 is equipped with a lever dial indicator 315. The lever dial indicator 315 is set so that its dial is in a position that is directly in front of the operator, which makes it easy to observe the changes of the pointer on the dial during the testing process. The probe of the lever dial indicator 315 abuts against the slide bar 312.

[0038] In the above-mentioned method of measuring the flatness of the end of the graphite electrode 6 using a lever dial indicator 315, due to the precision transmission design of the internal structure of the lever dial indicator 315, the probe of the lever dial indicator 315 is not allowed to rotate on the end of the graphite electrode 6, but only to swing to the side. This ensures the measurement accuracy requirements of the lever dial indicator 315 during the measurement process. Therefore, since the graphite electrode 6 is in a stationary state, a slide bar 312 with a rebound function is designed in this application. During the measurement process, the sliding action of the slide bar 312 is transmitted to the probe of the lever dial indicator 315 to effectively and accurately measure the flatness of the end of the graphite electrode 6.

[0039] Combined with appendix Figure 4 and attached Figure 5 As shown, the slide rod 312 is provided with a baffle 319. A return spring 320 is sleeved on the slide rod 312 between the baffle 319 and the fixed seat 311. Under the action of the return spring 320, the slide rod 312 has the function of automatic rebound. A groove 321 is opened at the end of the slide rod 312, and a mating block 322 is provided at the center of the groove 321 to abut against the probe of the lever dial indicator 315.

[0040] The working principle of the testing component 3 is as follows: First, the operator slides the adjusting cylinder 215 towards the end of the graphite electrode 6, causing the ball bearing 314 to abut against the end face of the graphite electrode 6. At this time, the return spring 320 will be in a slightly compressed state. Then, the rotating cylinder 217 is rotated, which will cause the ball bearing 314 to rotate in the circumferential direction of the end face of the graphite electrode 6. When the ball bearing 314 comes into contact with an uneven area during rotation, it will cause the slide rod 312 to slide. When the slide rod 312 slides, it will transmit the signal to the probe of the lever dial indicator 315 and cause the probe to move. At this time, the pointer in the lever dial indicator 315 will change. The operator observes whether the change in the pointer in the lever dial indicator 315 is within the specified range, thereby judging whether the flatness of the end of the graphite electrode is qualified.

[0041] Combined with appendix Figure 3 Appendix Figure 6 and attached Figure 7 As shown, the adjusting cylinder 215 is provided with an outwardly extending boss 511, and a sliding abutment seat 512 that abuts against the end of the rotating cylinder 217. A compression spring 513 is provided between the boss 511 and the abutment seat 512. A limiting seat 514 that abuts against the other end of the rotating cylinder 217 is detachably provided on the end of the adjusting cylinder 215 away from the boss 511. A connecting screw is provided on the end of the limiting seat 514. An internal threaded hole that mates with the connecting screw is opened on the adjusting cylinder 215. Friction plates are nested on the end faces of the abutment seat 512, the limiting seat 514, and the rotating cylinder 217. When installing the rotating cylinder 217, the rotating cylinder 217 is first connected to the adjusting cylinder 215 by means of bearing support, and at the same time... The abutment seat 512 is pressed, causing the compression spring 513 to be in a compressed state. At this time, under the reaction force of the compression spring 513, the end of the abutment seat 512 will tightly abut against one side end face of the rotating cylinder 217. Then, the limiting seat 514 is connected to the adjusting cylinder 215 by means of connecting screw and internal thread, and abuts against the other side end of the rotating cylinder 217. This can generate sufficient friction on both sides of the rotating cylinder 217, and the friction is greater than the weight of all the components installed on the rotating cylinder 217, so that the rotating cylinder 217 rotates in a damped manner. This not only enables automatic positioning of the detection component 3, but also maintains a consistent feel during the rotation adjustment of the rotating cylinder 217.

[0042] The lifting seat 213 is threaded with an adjusting screw 7 that rotatably engages with the boss 511. A guide rod 8 that slidably engages with the lifting seat 213 is also fixed on the boss 511. A locking nut is threaded onto the adjusting screw 7. Rotating the adjusting screw 7 will cause the boss 511 and the adjusting cylinder 215 to slide towards the end of the graphite electrode 6, and cause the ball 314 to abut against the end of the graphite electrode 6. After adjustment, the locking nut is rotated to make the end tightly abut against the end face of the lifting seat 213. This can prevent the adjusting screw 7 from loosening during use.

[0043] Combined with appendix Figure 3 and attached Figure 8 As shown, the fixing component 4 includes a cavity 411 formed on the swing arm 212. A positioning pin 412 is slidably inserted in the cavity 411. A pressure plate 413 is provided on the positioning pin 412. A return spring 414 is sleeved on the positioning pin 412 between the pressure plate 413 and the top wall of the cavity 411. The mounting base 211 has pin holes 415 symmetrically formed at both ends for the positioning pin 412 to be inserted. With the cooperation of the positioning pin 412 and the pin holes 415, the swing arm 212 is fixedly connected to the mounting base 211.

[0044] Combined with appendix Figure 3 As shown, a transition seat 220 is provided between the lifting seat 213 and the arc-shaped seat 214 to fix the two together. An adjusting screw 221 that rotates with the transition seat 220 is threaded through the swing arm 212. A guide rod 222 that slides with the swing arm 212 is also fixed on the arc-shaped seat 214. A locking nut 221 is threaded on the adjusting screw 221. Rotating the adjusting screw 221 causes the transition seat 220 to slide up and down, and at the same time causes the lifting seat 213 and the arc-shaped seat 214 to slide up and down.

[0045] In specific implementation of this invention, firstly, according to the detection requirements of graphite electrodes 6 with different diameters, an appropriate reference arc block 216 is selected and connected to the arc seat 214. Then, the mounting seat 211 is connected to the clamping seat 111. In the initial state, there is a certain distance between the reference arc block 216 and the graphite electrode 6. By rotating the adjusting screw 221, the lifting seat 213 and the reference arc block 216 are moved downward, so that the reference arc block 216 abuts against the outer wall of the graphite electrode 6. Then, the adjusting screw 7 is rotated, so that the adjusting cylinder 215, the rotating cylinder 217 and the ball bearing 314 move towards the end of the graphite electrode 6, so that the ball bearing 314 abuts against the end of the graphite electrode 6. On the end face of the graphite electrode 6, the operator manually rotates the rotating cylinder 217, causing the ball bearing 314 to rotate in the circumferential direction of the end face of the graphite electrode 6. When the ball bearing 314 comes into contact with an uneven area during rotation, it causes the slide rod 312 to slide. The sliding of the slide rod 312 is then transmitted to the probe of the lever dial indicator 315. The operator observes whether the pointer change in the lever dial indicator 315 is within the specified range to determine whether the flatness of the graphite electrode end is qualified. This allows for effective detection of the flatness of the graphite electrode end on the processing table 1, reducing the requirements of the detection process and the dependence on a dedicated operating table, thus improving the practicality of the device.

[0046] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A graphite electrode testing device, comprising a processing table (1) for simultaneously machining internal threads at both ends of a graphite electrode (6), wherein the processing table (1) is provided with a clamping seat (111) for positioning the graphite electrode (6), characterized in that: The clamping seat (111) is provided with a detachable mounting seat (211), and a swing arm (212) is rotatably provided on the mounting seat (211). A lifting seat (213) is vertically slidably provided at the end of the swing arm (212), and an arc seat (214) is provided on the lifting seat (213). An adjusting cylinder (215) that coincides with the arc surface axis of the arc seat (214) is slidably provided on the lifting seat (213). It also includes a plurality of reference arc blocks (216) that are equal in curvature to graphite electrodes (6) of different diameters. The reference arc blocks (216) are detachably connected to the arc seat (214), and their axes are coincident after connection. The regulating cylinder (215) is equipped with a damped rotating cylinder (217), the rotating cylinder (217) is equipped with a connecting seat (218), and a telescopic moving seat (219) is provided on the connecting seat (218). The moving seat (219) is equipped with a detection component (3) for detecting the flatness of the end of the graphite electrode (6), and a fixing component (4) is provided on the swing arm (212) to fix itself to the mounting base (211).

2. The graphite electrode detection device according to claim 1, characterized in that: The detection component (3) includes a fixed seat (311) mounted on a movable seat (219). A slide rod (312) with a spring-loaded function is slidably inserted on the fixed seat (311). A seat (313) is provided on the slide rod (312) and a ball bearing (314) is rotatably mounted on the seat (313). A lever dial indicator (315) is provided on the fixed seat (311), and the probe of the lever dial indicator (315) abuts against the slide rod (312).

3. The graphite electrode detection device according to claim 2, characterized in that: The seat (313) is provided with a raceway seat (316) for the ball (314) to rotate. The raceway seat (316) includes a left raceway seat (317) and a right raceway seat (318) that are used in conjunction with each other and detachably connected to the seat (313).

4. The graphite electrode detection device according to claim 2, characterized in that: The slide rod (312) is provided with a baffle (319), and a return spring (320) is sleeved on the slide rod (312) between the baffle (319) and the fixed seat (311). A groove (321) is provided at the end of the slide rod (312), and a mating block (322) is provided at the center of the groove (321) to abut against the probe of the lever dial indicator (315).

5. A graphite electrode detection device according to any one of claims 1-4, characterized in that: The adjusting cylinder (215) is provided with an outwardly extending boss (511) and a sliding abutment seat (512) that abuts against the end of the rotating cylinder (217). A compression spring (513) is provided between the boss (511) and the abutment seat (512). A limiting seat (514) that abuts against the other end of the rotating cylinder (217) is detachably provided on the end of the adjusting cylinder (215) away from the boss (511).

6. The graphite electrode detection device according to claim 5, characterized in that: The lifting seat (213) is threaded with an adjusting screw (7) that rotates with the boss (511), and a guide rod (8) that slides with the lifting seat (213) is also fixed on the boss (511).

7. The graphite electrode detection device according to claim 1, characterized in that: The fixing component (4) includes a cavity (411) opened on the swing arm (212), a positioning pin (412) is slidably inserted in the cavity (411), a pressure plate (413) is provided on the positioning pin (412), a return spring (414) is sleeved on the positioning pin (412) between the pressure plate (413) and the top wall of the cavity (411), and pin holes (415) for the positioning pin (412) to be inserted are symmetrically opened at both ends of the mounting base (211).

8. The graphite electrode detection device according to claim 1, characterized in that: A transition seat (220) is provided between the lifting seat (213) and the arc seat (214) to fix the two together. An adjusting screw (221) is threaded through the swing arm (212) and rotates with the transition seat (220). A guide rod (222) is also fixedly provided on the arc seat (214) and slides with the swing arm (212).

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