A dynamic detection device for offline maintenance of continuous casting roll rotary joints
By designing a dynamic detection device for the rotary joint of continuous casting rolls, the problems of sealing failure and poor lubrication of continuous casting rolls under high temperature and humidity conditions were solved. Real-time monitoring and early warning of the rotary joints were realized, ensuring production continuity and equipment safety, reducing maintenance costs, and improving product quality and equipment reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BENXI GANGTIEGROUP MASCH MFG CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-30
AI Technical Summary
In the existing technology, when the rotary joint of continuous casting roll is operated under conditions such as high temperature and humidity, rotation and load, it is prone to failures such as sealing failure, poor lubrication, damage or wear of parts, resulting in production interruption and equipment damage. Moreover, offline maintenance cannot simulate actual operating conditions, causing the failure to appear quickly after the machine is put back on.
A dynamic testing device for offline maintenance of continuous casting roll rotary joints was designed, including components such as a fixed base, bearing housing, roll body, rotary joint, flow meter, temperature sensor, pressure sensor, visual camera, infrared thermal imager, and PLC controller. It performs dynamic testing by simulating actual working conditions and monitors the sealing performance, temperature, pressure, and lubrication status of the rotary joint in real time.
It enables timely fault detection and early warning of rotary joints, ensuring production continuity, improving billet quality, reducing maintenance costs, extending equipment service life, avoiding safety accidents, and optimizing equipment operating parameters.
Smart Images
Figure CN224435756U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a dynamic detection device for offline maintenance of continuous casting roll rotary joints. Background Technology
[0002] The cooling water supply inside the continuous casting roll protects the bearings and roll surface from high temperatures, thus protecting the continuous casting roll assembly and ensuring slab quality. Offline maintenance, installation, and commissioning are all conducted under static conditions. However, in actual production operation, the continuous casting roll operates under conditions of high temperature and humidity, rotation, and load. Offline maintenance, even after passing static testing, can easily lead to problems such as seal failure, poor lubrication, and component damage or wear during operation.
[0003] Furthermore, during online use, continuous casting roll rotary joints may malfunction due to various reasons, including misalignment between the hollow shaft and the mating rotating body, low assembly precision leading to excessive vibration, foreign objects easily entering the friction pair contact surface, external pressure, temperature, and speed exceeding the selected range during use, failure to add lubricating grease at the specified time, deformation of the sealing friction pair friction surface, excessive wear of the compensation ring, deformation, aging, cracking, and adhesion of the sealing ring, and damage to the bellows. Therefore, offline dynamic testing of continuous casting roll rotary joints after offline maintenance is crucial and directly affects their service life on the machine. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dynamic detection device for offline maintenance of continuous casting roll rotary joints.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A dynamic testing device for offline maintenance of a continuous casting roll rotary joint includes a fixed platform. The top outer wall of the fixed platform is bolted with equally spaced bearing seats, and a roller body is rotatably mounted between adjacent bearing seats. Rotary joints are rotatably connected to both ends of the roller bodies, and sealing flanges are bolted to the rotary joints. A first conduit is welded to one end of one of the sealing flanges, and a first flow meter is bolted to the end of the first conduit. A second conduit is welded to one end of the other sealing flange, and a second flow meter is bolted to the outer wall of the second conduit. A water inlet pipe is connected to one side of the first flow meter, and a circulation pump is connected to the end of the water inlet pipe away from the first flow meter. A return pipe is bolted between the circulation pump and the second flow meter.
[0007] A driven idler roller is rotatably mounted on one side of the bottom outer wall of the roller body, and an active idler roller is rotatably mounted on the other side of the bottom outer wall of the roller body. A first synchronous pulley is fixed to one end of the active idler roller by screws, and a synchronous belt is engaged with the outer wall of the first synchronous pulley. A second synchronous pulley is engaged with one end of the synchronous belt, and a geared motor is connected to the shaft center of one side of the outer wall of the second synchronous pulley by a coupling. A visual camera is mounted on one side of the bottom of the rotary joint, and an infrared thermal imager is mounted on one side of the outer wall of the rotary joint. A PLC controller is mounted on one side of the top of the fixed base, and the PLC controller is connected to a first flow meter, a second flow meter, a geared motor, a visual camera, and an infrared thermal imager via signal lines.
[0008] As a further embodiment of this utility model: a first pressure sensor is inserted and fixed in the middle of the first conduit, and a second pressure sensor is inserted and fixed in the middle of the second conduit; temperature sensors are installed on the inner walls of both the first and second conduits.
[0009] As a further improvement of this utility model: a pressure gauge is connected to one side of the inner wall of the water inlet pipe through a pipe, and a booster pump is installed on one side of the pressure gauge.
[0010] As a further embodiment of this utility model: a sampling tube is connected to the inner wall of one side of the middle part of the reflux tube, and an electrically controlled valve is fixed to the end of the sampling tube.
[0011] As a further embodiment of this utility model: a support frame is welded to the top of the fixed base on one side of the driven roller, and a mounting seat is slidably inserted into the top of the support frame. An electric telescopic rod is connected to the bottom side of the mounting seat by screws, and a pressure roller is rotatably installed between the two mounting seats.
[0012] As a further embodiment of this invention: the two pressure rollers are located above the roller body, and the distance between the two pressure rollers is less than the inner wall diameter of the roller body.
[0013] As a further embodiment of this utility model: the top outer wall of the fixed platform is fitted with a fixed frame by bolts, and a hydraulic jack is provided on the top of the fixed frame. The bottom piston rod of the hydraulic jack is connected to a counterweight block, and the counterweight block is located directly above the roller.
[0014] As a further embodiment of this utility model: the top two ends of the fixing frame are both through-holes, and the top two ends of the counterweight block are both welded with limit guide posts. The limit guide posts are located directly below the limit holes, and the limit holes and limit guide posts form an insertion fit.
[0015] A dynamic inspection method for offline maintenance of continuous casting roll rotary joints includes the following steps:
[0016] S1: First, the adjacent rollers are rotated and installed on the bearing housings using the bearing housings, and the bearing housings are fixed on the top of the fixed platform. After assembly and splicing, the rotary joints are installed at both ends of the rollers to ensure stable rotation and connection with the test system.
[0017] S2: Next, we will simulate the fluid transport conditions in actual operation. The circulating water pressure and flow rate vary for different steel grades, generally between 0.5 and 1.2 MPa. A suitable circulating pump with a power of 11 kW, a head of 80 meters, and a flow rate of 12.5 m³ / h will be selected. 3 With a capacity of 380V and a flow rate of 380V, it can provide the power for water circulation, ensuring that water flows continuously in the system and meeting the actual water pressure and flow requirements on site.
[0018] S3: The next step is to assemble the remaining parts. Depending on the actual steel grade being produced, the rotation speed of the online continuous casting roll will vary. A three-phase asynchronous motor with a speed of 1400 rpm and a power of 5.5 kW (4-pole) is selected. The output speed of the continuous casting roll is usually 60 rpm, and the reduction ratio is approximately 1400 ÷ 60 ≈ 23.33. A cycloidal pinwheel reduction motor of model XWD5-23-5.5 is selected to match it.
[0019] S4: Simulates different working temperature conditions, mainly controlling the circulating water temperature and the temperature of the test environment. It uses temperature sensors installed on the inner walls of the first and second conduits for temperature feedback and adjusts the water flow rate according to the output signal of the PLC controller, thereby controlling the water temperature.
[0020] S5: In order to detect the sealing condition of the roller body under dynamic conditions, the geared motor is first started to drive the active idler roller to rotate. In conjunction with the cooperation of the driven idler rollers and pressure rollers in the other three directions of the roller body, the roller body can be rotated. In conjunction with the real-time detection of the visual camera, it can be seen whether there is any leakage at the joint of the rotary joint. The infrared thermal imager on the side monitors the temperature of the rotary joint during operation. Abnormally high temperature may indicate increased friction or poor lubrication.
[0021] S6: In addition, in order to further simulate the pressure of the actual slab on the continuous casting roll and the weight of the slab itself, while the roll body is rotating for detection, the top hydraulic jack is used to drive the counterweight block to descend, applying a pressure of 10 to 30 tons to the roll body, thereby simulating the external force applied to the continuous casting rolls of different steel grades and different positions.
[0022] S7: The first and second pressure sensors installed in the middle of the first and second conduits can monitor pressure changes in real time during operation. If the pressure fluctuates abnormally or exceeds the set range, it indicates that there are problems such as leakage or blockage in the rotary joint. For rotary joints that use circulating water media online, samples can be taken periodically for analysis to detect impurities, wear particles, moisture content, etc. in the circulating water media in order to assess the wear condition inside the rotary joint.
[0023] Compared with the prior art, this utility model provides a dynamic detection device for offline maintenance of continuous casting roll rotary joints, which has the following beneficial effects:
[0024] 1. The continuous casting roll of the line inspection device in this design plays a key role in the continuous casting process. If the rotary joint fails, it may lead to production interruption and cause huge economic losses. The dynamic inspection device can detect potential problems in time, carry out maintenance and repair in advance, ensure the continuous production, and ensure production continuity.
[0025] 2. The detection device designed in this paper has a rotary joint that may affect the cooling effect of the continuous casting roll, which may lead to a decrease in the quality of the cast billet, such as cracks and segregation. Real-time detection can ensure the normal operation of the rotary joint, which helps to stabilize the quality of the cast billet and improve the quality of the product.
[0026] 3. If the failure of the rotary joint in the detection device designed in this way is not detected in time, it may lead to more serious equipment damage or even safety accidents. The dynamic detection device can provide early warning and take measures to avoid dangerous situations and prevent safety accidents. Furthermore, by monitoring the operating status of the rotary joint in real time and analyzing the data, its performance change trend can be understood, providing a basis for optimizing equipment design and operating parameters, and improving the efficiency and reliability of the entire continuous casting system.
[0027] 4. The detection device designed in this paper reduces maintenance costs. Regular inspections can help address problems before they become serious, preventing minor issues from developing into major malfunctions. This reduces maintenance costs and complexity. Timely detection and resolution of abnormalities in the rotary joint can reduce wear and fatigue of components and extend the service life of the continuous casting roll and rotary joint.
[0028] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a dynamic detection device for offline maintenance of a continuous casting roll rotary joint proposed in this utility model.
[0030] Figure 2This is a front view of the overall three-dimensional structure of a dynamic detection device for offline maintenance of a continuous casting roll rotary joint proposed in this utility model.
[0031] Figure 3 This is a side view of the overall three-dimensional structure of a dynamic detection device for offline maintenance of a continuous casting roll rotary joint proposed in this utility model.
[0032] Figure 4 This is a first-view structural schematic diagram of a dynamic detection device for offline maintenance of a continuous casting roll rotary joint proposed in this utility model.
[0033] Figure 5 This is a partially enlarged schematic diagram of a dynamic detection device for offline maintenance of a continuous casting roll rotary joint proposed in this utility model.
[0034] Figure 6 This is a partial structural side view of a dynamic detection device for offline maintenance of a continuous casting roll rotary joint proposed in this utility model.
[0035] In the diagram: 1. Fixed platform; 2. Bearing housing; 3. Roller body; 4. Rotary joint; 5. Sealing connection flange; 6. First conduit; 7. First flow meter; 8. Second conduit; 9. Second flow meter; 10. Inlet pipe; 11. Circulation pump; 12. Return pipe; 13. First pressure sensor; 14. Second pressure sensor; 15. Pressure gauge; 16. Booster pump; 17. Sampling tube; 18. Electrically controlled valve; 19. Driven idler roller; 20. Driven idler roller; 21. First synchronous pulley; 22. Synchronous belt; 23. Second synchronous pulley; 24. Gear motor; 25. Support frame; 26. Mounting base; 27. Electric telescopic rod; 28. Pressure roller; 29. Visual camera; 30. Infrared thermal imager; 31. Fixed frame; 32. Hydraulic jack; 33. Counterweight block; 34. Limiting hole; 35. Limiting guide post. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0037] Example 1:
[0038] A dynamic detection device for offline maintenance of continuous casting roll rotary joints, as described in this embodiment, Figure 1-6As shown, the device includes a fixed base 1, with bearing seats 2 evenly distributed on the top outer wall of the fixed base 1 fixed by bolts. Rollers 3 are rotatably installed between adjacent bearing seats 2. Rotary joints 4 are rotatably connected to both ends of the rollers 3. Sealing connection flanges 5 are fixed to the rotary joints 4 by bolts. A first conduit 6 is welded to one end of one of the sealing connection flanges 5, and a first flow meter 7 is fixed to the end of the first conduit 6 by bolts. A second conduit 8 is welded to one end of the other sealing connection flange 5, and a second flow meter 9 is fixed to the outer wall of the second conduit 8 by bolts.
[0039] Reducing maintenance costs and regular inspections can help address problems before they become serious, preventing minor issues from escalating into major malfunctions, thereby reducing maintenance costs and complexity. Timely detection and resolution of abnormalities in the rotary joint 4 can reduce wear and fatigue of components and extend the service life of the continuous casting roll and the rotary joint 4.
[0040] The first flow meter 7 is connected to an inlet pipe 10 on one side, and the end of the inlet pipe 10 away from the first flow meter 7 is connected to a circulation pump 11. The circulation pump 11 and the second flow meter 9 are fixed together by a return pipe 12 with bolts.
[0041] A first pressure sensor 13 is inserted and fixed in the middle of the first conduit 6, and a second pressure sensor 14 is inserted and fixed in the middle of the second conduit 8. Temperature sensors are installed on the inner walls of both the first conduit 6 and the second conduit 8.
[0042] If the failure of the rotary joint 4 is not detected in time, it may lead to more serious equipment damage or even safety accidents. The dynamic detection device can provide early warning and take measures to avoid dangerous situations and prevent safety accidents. Furthermore, by monitoring the operating status of the rotary joint 4 in real time and analyzing the data, we can understand its performance change trend, provide a basis for optimizing equipment design and operating parameters, and improve the efficiency and reliability of the entire continuous casting system.
[0043] A pressure gauge 15 is connected to one side of the inner wall of the inlet pipe 10 via a pipe, and a booster pump 16 is installed on one side of the pressure gauge 15. A sampling pipe 17 is connected to one side of the inner wall of the middle part of the return pipe 12, and an electric control valve 18 is fixed to the end of the sampling pipe 17.
[0044] A driven roller 19 is rotatably mounted on one side of the bottom outer wall of the roller body 3, and an active roller 20 is rotatably mounted on the other side of the bottom outer wall of the roller body 3. A first synchronous pulley 21 is fixed to one end of the outer wall of the active roller 20 by screws, and a synchronous belt 22 is engaged with the outer wall of the first synchronous pulley 21. A second synchronous pulley 23 is engaged with one end of the synchronous belt 22, and a geared motor 24 is connected to the shaft center of one side of the outer wall of the second synchronous pulley 23 by a coupling.
[0045] The top outer wall of the fixed platform 1 is bolted with a fixed frame 31, and a hydraulic jack 32 is provided on the top of the fixed frame 31. The bottom piston rod of the hydraulic jack 32 is connected to a counterweight block 33, and the counterweight block 33 is located directly above the roller body 3.
[0046] Failure of the rotary joint 4 may affect the cooling effect of the continuous casting roll, resulting in a decline in the quality of the cast billet, such as cracks and segregation. Real-time detection can ensure the normal operation of the rotary joint 4, which helps to stabilize the quality of the cast billet and improve product quality.
[0047] The top two ends of the fixing frame 31 are both through-holes 34, and the top two ends of the counterweight block 33 are both welded with limit guide posts 35. The limit guide posts 35 are located directly below the limit holes 34, and the limit holes 34 and the limit guide posts 35 form an insertion fit.
[0048] Example 2:
[0049] A dynamic detection device for offline maintenance of continuous casting roll rotary joints, such as Figure 1-4 As shown, this embodiment makes the following additions based on embodiment 1: a support frame 25 is welded to the top of the fixed base 1 on one side of the driven roller 19, and a mounting seat 26 is slidably inserted into the top of the support frame 25. An electric telescopic rod 27 is connected to the bottom side of the mounting seat 26 by screws, and a pressure roller 28 is rotatably installed between the two mounting seats 26.
[0050] Its continuous casting rolls play a key role in the continuous casting process. If the rotary joint 4 malfunctions, it may lead to production interruption and cause huge economic losses. Through the dynamic detection device, potential problems can be detected in time, maintenance and repair can be carried out in advance, and production can be continued to ensure continuity.
[0051] The two pressure rollers 28 are located above the roller body 3, and the distance between the two pressure rollers 28 is smaller than the inner wall diameter of the roller body 3;
[0052] A visual camera 29 is provided on one side of the bottom of the rotary joint 4, and an infrared thermal imager 30 is provided on one side of the outer wall of the rotary joint 4. A PLC controller is installed on one side of the top of the fixed base 1, and the PLC controller is connected to the first flow meter 7, the second flow meter 9, the geared motor 24, the visual camera 29 and the infrared thermal imager 30 through signal lines.
[0053] A dynamic inspection method for offline maintenance of continuous casting roll rotary joints includes the following steps:
[0054] S1: First, the adjacent roller body 3 is rotated and installed on the bearing seat 2 with the help of the bearing seat 2, and the bearing seat 2 is fixed on the top of the fixed platform 1. After assembly and splicing, the rotary joint 4 is installed at both ends of the roller body 3 to connect it, ensuring that it can rotate stably and connect to the test system.
[0055] S2: Next, the fluid transmission conditions in actual operation will be simulated. The circulating water pressure and flow rate vary depending on the steel grade, generally ranging from 0.5 to 1.2 MPa. A suitable circulating pump 11 will be selected, with a power of 11 kW, a head of 80 meters, and a flow rate of 12.5 m³ / h. 3 With a capacity of 380V and a flow rate of 380V, it can provide the power for water circulation, ensuring that water flows continuously in the system and meeting the actual water pressure and flow requirements on site.
[0056] S3: The next step is to assemble the remaining parts. Depending on the actual steel grade being produced, the rotation speed of the online continuous casting roll will vary. A three-phase asynchronous motor with a speed of 1400 rpm and a power of 5.5 kW (4-pole) is selected. The output speed of the continuous casting roll is usually 60 rpm, and the reduction ratio is approximately 1400 ÷ 60 ≈ 23.33. A cycloidal pinwheel reduction motor of model 24XWD5-23-5.5 is selected to match it.
[0057] S4: Simulates different working temperature conditions, mainly controls the circulating water temperature and the temperature of the test environment, and uses temperature sensors set on the inner walls of the first conduit 6 and the second conduit 8 for temperature feedback, and adjusts the water flow rate according to the output signal of the PLC controller, thereby controlling the water temperature;
[0058] S5: In order to detect the sealing condition of the roller 3 under dynamic conditions, the geared motor 24 is started first to drive the active idler 20 to rotate. In this way, with the cooperation of the driven idler 19 and pressure roller 28 in the other three directions of the roller 3, the roller 3 can be driven to rotate. In this way, with the constant detection of the visual camera 29, it can be seen whether there is any leakage at the connection of the rotary joint 4. The infrared thermal imager 30 on the side monitors the temperature of the rotary joint during operation. Abnormal high temperature may indicate increased friction or poor lubrication.
[0059] S6: In addition, in order to further simulate the pressure of the actual slab on the continuous casting roll and the weight of the slab itself, while the roll body 3 is rotating for detection, the hydraulic jack 32 at the top is used to drive the counterweight block 33 to descend, applying a pressure of 10 to 30 tons to the roll body 3, thereby simulating the external force applied to the continuous casting rolls of different steel grades and different positions.
[0060] S7: The first pressure sensor 13 and the second pressure sensor 14 installed in the middle of the first conduit 6 and the second conduit 8 can monitor the pressure changes in real time during the operation. If the pressure fluctuates abnormally or exceeds the set range, it indicates that there are problems such as leakage or blockage in the rotary joint 4. For the rotary joint 4 that uses circulating water medium online, samples can be taken periodically for analysis to detect impurities, wear particles, moisture content, etc. in the circulating water medium in order to assess the wear condition inside the rotary joint.
[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A dynamic detection device for off-line maintenance of a continuous casting roller rotary joint, comprising a fixed pedestal (1), characterized in that, The top outer wall of the fixed platform (1) is fixed with bearing seats (2) distributed at equal intervals by bolts, and rollers (3) are rotatably installed between adjacent bearing seats (2). Both ends of the rollers (3) are rotatably connected with rotary joints (4), and the rotary joints (4) are fixed with sealing flanges (5) by bolts. One end of one of the sealing flanges (5) is welded with a first conduit (6), and the end of the first conduit (6) is fixed with a first flow meter (7) by bolts. One end of the other sealing flange (5) is welded with a second conduit (8), and the outer wall of the second conduit (8) is fixed with a second flow meter (9) by bolts. One side of the first flow meter (7) is connected with an inlet pipe (10), and the end of the inlet pipe (10) away from the first flow meter (7) is connected with a circulation pump (11). The circulation pump (11) and the second flow meter (9) are fixed with a return pipe (12) by bolts. A driven roller (19) is rotatably mounted on one side of the bottom outer wall of the roller body (3), and an active roller (20) is rotatably mounted on the other side of the bottom outer wall of the roller body (3). A first synchronous pulley (21) is fixed to one end of the active roller (20) by screws, and a synchronous belt (22) is engaged on the outer wall of the first synchronous pulley (21). A second synchronous pulley (23) is engaged at one end of the synchronous belt (22), and a geared motor (24) is connected to the shaft center of one side of the outer wall of the second synchronous pulley (23) by a coupling. A visual camera (29) is mounted on one side of the bottom of the rotary joint (4), and an infrared thermal imager (30) is mounted on one side of the outer wall of the rotary joint (4). A PLC controller is installed on one side of the top of the fixed base (1), and the PLC controller is connected to a first flow meter (7), a second flow meter (9), a geared motor (24), a visual camera (29), and an infrared thermal imager (30) through signal lines.
2. The dynamic detection device for off-line maintenance of a continuous casting roller rotary joint according to claim 1, characterized in that, A first pressure sensor (13) is inserted and fixed in the middle of the first conduit (6), and a second pressure sensor (14) is inserted and fixed in the middle of the second conduit (8). Temperature sensors are installed on the inner walls of both the first conduit (6) and the second conduit (8).
3. The dynamic detection device for off-line maintenance of a continuous casting roller rotary joint according to claim 1, characterized in that, A pressure gauge (15) is connected to one side of the inner wall of the water inlet pipe (10) through a pipe, and a booster pump (16) is installed on one side of the pressure gauge (15).
4. The dynamic detection device for off-line maintenance of a continuous casting roller rotary joint according to claim 1, characterized in that, The inner wall of one side of the middle part of the reflux pipe (12) is connected to a sampling pipe (17), and an electric control valve (18) is fixed at the end of the sampling pipe (17).
5. The dynamic detection device for off-line maintenance of a continuous casting roller rotary joint according to claim 1, characterized in that, The fixed base (1) has a support frame (25) welded to the top of the driven roller (19) on one side, and a mounting seat (26) is slidably inserted into the top of the support frame (25). An electric telescopic rod (27) is connected to the bottom side of the mounting seat (26) by screws, and a pressure roller (28) is rotatably installed between the two mounting seats (26).
6. The dynamic detection device for offline maintenance of continuous casting roll rotary joint according to claim 5, characterized in that, The two pressure rollers (28) are located above the roller body (3), and the distance between the two pressure rollers (28) is less than the inner wall diameter of the roller body (3).
7. The dynamic detection device for offline maintenance of continuous casting roll rotary joint according to claim 6, characterized in that, The top outer wall of the fixed platform (1) is bolted with a fixed frame (31), and a hydraulic jack (32) is provided on the top of the fixed frame (31). The piston rod at the bottom of the hydraulic jack (32) is connected to a counterweight block (33), and the counterweight block (33) is located directly above the roller body (3).
8. The dynamic detection device for offline maintenance of continuous casting roll rotary joint according to claim 7, characterized in that, The top two ends of the fixing frame (31) are both through-holes (34), and the top two ends of the counterweight block (33) are both welded with limit guide posts (35). The limit guide posts (35) are located directly below the limit holes (34), and the limit holes (34) and the limit guide posts (35) form a plug-in fit.