A kind of external mill AGC displacement sensor detection device

Abstract

The utility model relates to a kind of external mill AGC displacement sensor detection device, belong to sensor detection device technical field.The utility model's technical scheme is: sensor fixed base gland assembly (2) is fixed on test platform (1), AGC displacement sensor has two, while constraint is fixed on sensor fixed base gland assembly (2);Guide sleeve (3) is installed on test platform, the front end of top rod (4) is connected with AGC displacement sensor plunger matching, rear end is connected with guide sleeve (3) matching;Hydraulic jack (6) and top rod (4) pass through synchronous connecting plate (5) power transmission;Hydraulic jack (6) is installed on test platform (1).The utility model has the beneficial effects of: simple structure, easy operation, stable and reliable, and can quickly detect displacement sensor and system module.

Description

Technical Field

[0001] This utility model relates to an external rolling mill AGC displacement sensor detection device, belonging to the technical field of sensor detection devices. Background Technology

[0002] The hydraulic cylinder displacement sensor in the rolling mill AGC (Automatic Thickness Control) system is a key component ensuring the thickness accuracy of the rolled sheet. It primarily monitors the real-time displacement changes of the hydraulic cylinder piston rod and feeds the signal back to the control system for high-precision dynamic adjustment. (See appendix) Figure 7-8 Normally, AGC displacement sensors are installed on both sides of the rolling mill AGC hydraulic cylinder to monitor the displacement of the hydraulic cylinder piston rod with high precision.

[0003] During the production process, the sensor is frequently used and operates under harsh conditions, which can lead to sensor damage. Factors such as water ingress causing internal corrosion and jamming, water ingress causing internal magnetic ring failure, deformation and failure of the guide pointer that cooperates with the magnetic ring, and internal spring failure resulting in slow response speed can all cause sensor failure, affecting its high-precision detection, affecting product quality accuracy, and causing unplanned production line shutdowns that prevent normal production.

[0004] Damaged AGC displacement sensors can be repaired independently by disassembling and cleaning internal components, grinding them, correcting and fitting the guide pointer, and replacing the spring. However, due to the inadequate quality inspection equipment before the repaired AGC displacement sensors are put into operation, it is impossible to use common testing tools such as multimeters for measurement and judgment, to simulate the working conditions of the machine in real time for testing, and to accurately assess their detection accuracy and integrity. Only a simple inspection can be performed before they are put into operation. If a fault occurs after installation, unplanned shutdowns must be carried out again for disassembly and replacement, affecting normal production line operations. This also impacts the testing of new products before they are put into operation, fault diagnosis of control modules connected to AGC displacement sensors, and system optimization and upgrade testing.

[0005] The sensor is installed on both sides of the rolling mill's AGC hydraulic cylinder, with one side located inside the mill stand window. The space for sensor replacement is extremely narrow; personnel can only replace it by crawling into the limited space above the support rolls inside the mill. Online replacement and maintenance involve a heavy workload and long processing time, significantly impacting production line operations. Therefore, efficient pre-installation testing of this sensor is crucial, and a new technical solution is urgently needed to address these challenges. Summary of the Invention

[0006] The purpose of this invention is to provide an external rolling mill AGC displacement sensor detection device. It uses a hydraulic jack and a synchronous connecting plate to drive a push rod and drive two AGC displacement sensors for rapid detection. Simultaneously, it can test the fault conditions of system modules, and is used for system fault diagnosis and system optimization and upgrade testing. It has the advantages of simple structure, convenient operation, and stable reliability. It can quickly detect displacement sensors and system modules, solving the aforementioned problems in the background technology.

[0007] The technical solution of this utility model is: an external rolling mill AGC displacement sensor detection device, comprising a test platform, a sensor fixing base cover assembly, a guide sleeve, a push rod, a synchronous connecting plate, and a hydraulic jack. The sensor fixing base cover assembly is installed and fixed on the test platform. There are two AGC displacement sensors, which are simultaneously constrained and fixed on the sensor fixing base cover assembly. The guide sleeve is installed on the test platform. The front end of the push rod is matched and connected to the plunger of the AGC displacement sensor, and the rear end is matched and connected to the guide sleeve. The hydraulic jack and the push rod transmit power through the synchronous connecting plate. The hydraulic jack is installed on the test platform.

[0008] The test platform includes a rectangular steel plate and four legs, which are located below the rectangular steel plate. A first rectangular groove is provided on one side of the upper part of the rectangular steel plate, and a first internal threaded hole is provided in the first rectangular groove. Two second rectangular grooves with a certain distance are provided in the middle of the upper part of the rectangular steel plate, and second internal threaded holes are evenly distributed in the second rectangular grooves. An arc base is provided on the other side of the upper part of the rectangular steel plate, and an arc surface with the same radius of curvature is provided on the upper part of the arc base. The baffle is a rectangular plate, which is perpendicular to the rectangular steel plate and installed on the outer side of the end of the arc base.

[0009] The sensor mounting base and cover assembly includes a base and a cover, which are connected by external hexagonal bolts and installed and fixed in the first rectangular groove of the test platform; it also has a constraint hole unit, the structure of which is consistent with the original constraint hole unit of the displacement sensor mounting base and cover assembly installed on the AGC hydraulic cylinder, and matches the positioning ring of the AGC displacement sensor. The constraint and fixing method of each AGC displacement sensor is the same as that of its constraint and fixing method on the hydraulic cylinder.

[0010] The guide sleeve includes a sleeve base and a guide sleeve. The sleeve base is bolted and installed in the second rectangular groove of the test platform. There are two guide sleeves, which are tubular structures. The two guide sleeves are spaced apart and parallel. The center lines of the two guide sleeves coincide with the center lines of the two AGC displacement sensors. An observation window with a small scale indicator line is provided at the middle position above the guide sleeve. The observation window is a rectangular slot structure.

[0011] The push rod is a stepped shaft structure. Its front cylindrical part is engaged with the plunger of the AGC displacement sensor, and the engagement method is the same as its installation engagement method on the AGC hydraulic cylinder. Its rear cylindrical part is engaged with the guide sleeve of the guide sleeve, and the push rod slides in the guide sleeve along the common axis of the two. The rear cylindrical part of the push rod is provided with a large scale indicator line.

[0012] The radius of curvature of the arc surface above the arc base of the test platform is the same as the radius of the cylinder of the hydraulic jack. The hydraulic jack is placed on the arc base of the test platform and positioned by the constraint of the baffle.

[0013] The beneficial effects of this utility model are: by using a hydraulic jack and a synchronous connecting plate to drive the push rod and drive two AGC displacement sensors for rapid detection, it can also test the fault status of system modules, and is used for system fault diagnosis and system optimization and upgrade testing. It has the advantages of simple structure, convenient operation, stability and reliability, and can quickly test displacement sensors and system modules. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the testing platform of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the sensor fixing base cover of this utility model; Figure 4 This is a schematic diagram of the structure of the guide sleeve of this utility model; Figure 5 This is a schematic diagram of the structure of the push rod of this utility model; Figure 6 This is a three-dimensional structural diagram of the synchronous connection plate of this utility model from the left side view; Figure 7 This is a three-dimensional structural diagram of the synchronous connection plate of this utility model from the right side view; Figure 8 This is a schematic diagram of the structure of the AGC hydraulic cylinder and displacement sensor in the background technology; Figure 9 yes Figure 8 A magnified view of a portion of X; Figure 10 This is a schematic diagram of the installation position of the AGC hydraulic cylinder and displacement sensor in the rolling mill in the background art; In the diagram: Test platform 1, first rectangular groove 1001, first internal threaded hole 1002, second rectangular groove 1003, second internal threaded hole 1004, arc base 1005, baffle 1006, sensor fixing base pressure cover assembly 2, base 201, pressure cover 202, external hexagonal bolt 203, constraint hole unit 204, circular through hole one 205, guide sleeve 3, sleeve base 301, guide sleeve 302, rectangular boss 303, circular through hole two 304, observation window 305, small scale indicator line 306, top rod 4, front cylinder 401, rear cylinder 402, large scale indicator line 403, internal threaded hole 404, synchronous connecting plate 5, hydraulic jack positioning groove 501, countersunk bolt through hole 502, top rod positioning groove 503, hydraulic jack 6; Normal AGC displacement sensor 001, AGC displacement sensor under test 002, connecting signal line 003, rolling mill AGC hydraulic cylinder 004, original displacement sensor fixing base cover assembly 005, original constraint hole unit 0051, rolling mill frame 006, rolling mill internal support roll 007. Detailed Implementation

[0015] To make the purpose, technical solution, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described implementation cases are only a small part of this utility model, not all of them. All other implementation cases obtained by those skilled in the art based on the implementation cases of this utility model without creative effort are within the protection scope of this utility model.

[0016] An external rolling mill AGC displacement sensor detection device includes a test platform 1, a sensor fixing base cover assembly 2, a guide sleeve 3, a push rod 4, a synchronous connecting plate 5, and a hydraulic jack 6. The sensor fixing base cover assembly 2 is installed and fixed on the test platform 1. There are two AGC displacement sensors, which are simultaneously constrained and fixed on the sensor fixing base cover assembly 2. The guide sleeve 3 is installed on the test platform. The front end of the push rod 4 is matched and connected to the plunger of the AGC displacement sensor, and the rear end is matched and connected to the guide sleeve 3. The hydraulic jack 6 transmits power to the push rod 4 through the synchronous connecting plate 5. The hydraulic jack 6 is installed on the test platform 1.

[0017] The test platform 1 includes a rectangular steel plate and four legs, which are located below the rectangular steel plate. A first rectangular groove 1001 is provided on one side of the upper part of the rectangular steel plate, and a first internal threaded hole 1002 is provided in the first rectangular groove 1001. Two second rectangular grooves 1003 with a certain distance are provided in the middle of the upper part of the rectangular steel plate, and second internal threaded holes 1004 are evenly distributed in the second rectangular grooves 1003. An arc base 1005 is provided on the other side of the upper part of the rectangular steel plate, and an arc surface with the same radius of curvature is provided on its upper part. The baffle 1006 is a rectangular plate, which is perpendicular to the rectangular steel plate and installed on the outer side of the end of the arc base 1005.

[0018] The sensor fixing base cover assembly 2 includes a base 201 and a cover 202. The base 201 and the cover 202 are connected by external hexagonal bolts 203 and are installed and fixed in the first rectangular groove 1001 of the test platform 1. It also has a constraint hole unit 204, whose structure is consistent with the original constraint hole unit 0051 of the original displacement sensor fixing base cover assembly 005 installed on the AGC hydraulic cylinder. It matches the positioning ring of the AGC displacement sensor. The constraint fixing method of each AGC displacement sensor is the same as the constraint fixing method on the hydraulic cylinder.

[0019] The guide sleeve 3 includes a sleeve base 301 and a guide sleeve 302. The sleeve base 301 is installed in the second rectangular groove 1003 of the test platform 1 by bolt connection. There are two guide sleeves 302, which are tubular structures. The two guide sleeves 302 are parallel with a certain distance between them. The center lines of the two guide sleeves 302 coincide with the center lines of the two AGC displacement sensors respectively. An observation window 305 is provided at the middle position above the guide sleeve 302, and a small scale indicator line 306 is provided. The observation window 305 is a rectangular slot structure.

[0020] The push rod 4 is a stepped shaft structure. Its front end cylinder 401 is engaged with the plunger of the AGC displacement sensor, and the engagement method is the same as its installation engagement method on the AGC hydraulic cylinder. Its rear end cylinder 402 is engaged with the guide sleeve 302 of the guide sleeve 3. The push rod 4 is slidably arranged in the guide sleeve 302 along the common axis of the two. A large scale indicator line 403 is provided on the rear end cylinder 402 of the push rod 4.

[0021] The radius of curvature of the arc surface above the arc base 1005 of the test platform 1 is the same as the radius of the cylinder of the hydraulic jack 6. The hydraulic jack 6 is placed on the arc base 1005 of the test platform and is positioned by constraint by the baffle 1006.

[0022] like Figure 1 This utility model mainly includes a test platform 1, a sensor fixing base cover assembly 2, a guide sleeve 3, a top rod 4, a synchronous connecting plate 5, and a hydraulic jack 6.

[0023] like Figure 2 The test platform 1 is mainly composed of a rectangular steel plate and four legs. A first rectangular groove 1001 is provided on one side of the upper part of the rectangular steel plate, and a first internal threaded hole 1002 is provided in the first rectangular groove 1001. Two second rectangular grooves 1003 with a certain distance are provided in the middle of the upper part of the rectangular steel plate, and second internal threaded holes 1004 are evenly distributed in the second rectangular grooves 1003. An arc base 1005 is provided on the other side of the upper part of the rectangular steel plate, and an arc surface with the same radius of curvature is provided on its upper part. The baffle 1006 is a rectangular plate, which is perpendicular to the rectangular steel plate and installed on the outer side of the end of the arc base 1005.

[0024] like Figure 3 and Figure 8 The sensor mounting base cover assembly 2 consists of a base 201 and a cover 202, which are fixedly connected by external hexagonal bolts 203. It is used to constrain and fix two AGC hydraulic cylinder displacement sensors. The constraint and fixing method of each AGC displacement sensor is the same as that on the AGC hydraulic cylinder. The sensor mounting base cover assembly 2 is provided with a constraint hole unit 204, whose structure is consistent with the original constraint hole unit 0051 of the original displacement sensor mounting base cover assembly 005 installed on the AGC hydraulic cylinder. It matches the AGC displacement sensor positioning ring and is used to constrain and fix the AGC hydraulic cylinder displacement sensor.

[0025] The length and width of the bottom surface of the sensor mounting base cover assembly 2 are consistent with the first rectangular groove 1001 of the test platform 1, and circular through holes 205 on both sides are provided to match the first internal thread hole 1002 of the test platform 1. The sensor mounting base cover assembly 2 is installed in the first rectangular groove 1001 of the test platform 1 and is fixedly connected by bolts.

[0026] like Figure 4 The guide sleeve 3 is composed of a sleeve base 301 and a guide sleeve 302. Below the sleeve base 301 are rectangular bosses 303 with a certain spacing. Their length and width are consistent with the second rectangular groove 1003 of the test platform 1, and their spacing is consistent with the spacing between the two second rectangular grooves 1003 of the test platform 1. Each rectangular boss 303 has three circular through holes 304 that match the second internal threaded holes 1004 of the test platform 1.

[0027] Above the sleeve base 301 are two parallel guide sleeves 302 with a certain distance between them. The guide sleeves 302 are tubular structures with an observation window 305 in the middle of their upper part and a small scale indicator line 306. The observation window 305 is a rectangular slot structure.

[0028] The guide sleeve 3 is installed in the second rectangular groove 1003 of the test platform 1 and is fixed and constrained by bolts. The center line of the guide sleeve 302 of the guide sleeve 3 coincides with the constraint hole unit 204 of the sensor fixing base cover assembly 2.

[0029] like Figure 5 The push rod 4 has a stepped shaft structure. Its front cylindrical section 401 is consistent with the original push rod structure of the displacement sensor installed on the AGC hydraulic cylinder, and its end face contacts and engages with the head of the displacement sensor in the AGC hydraulic cylinder. The outer diameter of its rear cylindrical section 402 matches the inner diameter of the guide sleeve 302 of the guide sleeve 3, and the two form a pin engagement. The push rod 4 can slide within the guide sleeve 302 along the common axis of the two. The rear cylindrical section 402 is provided with a large scale indicator line 403, and the end face of the push rod 4 is provided with an internal threaded hole 404.

[0030] The large scale indicator line 403 has 1mm increments per division, and the small scale indicator line 306 has 0.98mm increments per division. The displacement of the push rod 4 relative to the guide sleeve 3 can be read through these two scale indicator lines.

[0031] like Figure 6 The synchronous connecting plate 5 has a hydraulic jack positioning groove 501 and two countersunk bolt through holes 502 on one side, and two push rod positioning grooves 503 on the other side. The hydraulic jack positioning groove 501 has a circular groove with a diameter consistent with the diameter of the plunger of the hydraulic jack 6, and the push rod positioning groove 503 has a circular groove with a diameter consistent with the diameter of the rear cylindrical part 402 of the push rod 4. One side of the synchronous connecting plate 5 cooperates with the hydraulic jack 6, and the other side is fixedly connected to the two push rods 4 by bolts to realize the power transmission between the hydraulic jack 6 and the push rods 4, which is used to uniformly and stably drive the movement of the rolling mill AGC displacement sensor.

[0032] The radius of curvature of the arc surface above the arc base 1005 of the test platform 1 is consistent with the radius of the cylinder of the hydraulic jack 6. The hydraulic jack 6 can be placed on the arc base 1005 of the test platform 1 and positioned by the constraint of the baffle 1006.

[0033] Normal AGC displacement sensor 001 and AGC displacement sensor 002 under test are installed in the sensor fixing base cover assembly 2. Both sensors are simultaneously connected to the same control system module and terminal computer via signal lines 003. A hydraulic jack 6, via a synchronous connecting plate 5, drives the push rod 4 to uniformly and stably drive the two AGC displacement sensors, causing the normal AGC displacement sensor 001 and the AGC displacement sensor 002 under test to move synchronously. This simulates actual working conditions. By analyzing the displacement curves, waveforms, and operational smoothness feedback from the system, and comparing key parameters with those of the normal AGC displacement sensor 001, the AGC displacement sensor 002 under test can be quickly detected and faults identified. Simultaneously, this device can also test the fault conditions of system modules for system fault diagnosis, system optimization and upgrade testing, etc., avoiding downtime caused by online testing that could affect production line operations.

[0034] In practical applications, the following detailed steps should be followed: (1) After installing the normal AGC displacement sensor 001 and the AGC displacement sensor to be tested 002 in place, connect them to the system through the signal line 003.

[0035] (2) Press the hydraulic jack 6 slowly / quickly so that it drives the push rod 4 through the synchronous connecting plate 5 and drives the AGC displacement sensor to generate displacement evenly and stably. The displacement curve, waveform, and smoothness of operation can be fed back by the system, and the key parameters of the normal AGC displacement sensor 001 can be compared to quickly detect the AGC displacement sensor 002 under test and troubleshoot the fault.

[0036] (3) Remove the connecting bolts between the synchronous connecting plate 5 and the push rod 4, slowly / quickly press the hydraulic jack 6 and release the pressure, observe the smoothness of the push rod 4's automatic extension, the change in displacement value and related parameters, and compare them with the relevant parameters of the normal AGC displacement sensor 001 for further testing.

[0037] (4) If system upgrade testing or troubleshooting is required, two normal AGC displacement sensors 001 can be installed and connected to two different control system modules respectively. Test according to the above scheme and observe the operating status of the detection system.

Claims

1. An external rolling mill AGC displacement sensor detection device, characterized in that: The test platform (1), sensor mounting base cover assembly (2), guide sleeve (3), push rod (4), synchronous connecting plate (5), and hydraulic jack (6) are included. The sensor mounting base cover assembly (2) is installed and fixed on the test platform (1). There are two AGC displacement sensors, which are simultaneously constrained and fixed on the sensor mounting base cover assembly (2). The guide sleeve (3) is installed on the test platform. The front end of the push rod (4) is matched and connected to the plunger of the AGC displacement sensor, and the rear end is matched and connected to the guide sleeve (3). The hydraulic jack (6) and the push rod (4) transmit power through the synchronous connecting plate (5). The hydraulic jack (6) is installed on the test platform (1).

2. The external rolling mill AGC displacement sensor detection device according to claim 1, characterized in that: The test platform (1) includes a rectangular steel plate and four legs, which are located below the rectangular steel plate. A first rectangular groove (1001) is provided on one side above the rectangular steel plate, and a first internal thread hole (1002) is provided in the first rectangular groove (1001). Two second rectangular grooves (1003) with a certain distance are provided in the middle of the upper part of the rectangular steel plate, and second internal thread holes (1004) are evenly distributed in the second rectangular grooves (1003). An arc base (1005) is provided on the other side above the rectangular steel plate, and an arc surface with the same radius of curvature is provided on its upper part. The baffle (1006) is a rectangular plate, which is perpendicular to the rectangular steel plate and installed on the outer side of the end of the arc base (1005).

3. The external rolling mill AGC displacement sensor detection device according to claim 2, characterized in that: The sensor fixing base cover assembly (2) includes a base (201) and a cover (202). The base (201) and the cover (202) are connected by external hexagonal bolts (203) and are installed and fixed in the first rectangular groove (1001) of the test platform (1). It also provides a constraint hole unit (204), whose structure is consistent with the original constraint hole unit (0051) of the original displacement sensor fixing base cover assembly (005) installed on the AGC hydraulic cylinder, and matches the positioning ring of the AGC displacement sensor. The constraint fixing method of each AGC displacement sensor is the same as the constraint fixing method on the hydraulic cylinder.

4. The external rolling mill AGC displacement sensor detection device according to claim 2, characterized in that: The guide sleeve (3) includes a sleeve base (301) and a guide sleeve (302). The sleeve base (301) is installed in the second rectangular groove (1003) of the test platform (1) by bolt connection. There are two guide sleeves (302), which are tubular structures. The two guide sleeves (302) are spaced apart and parallel. The center lines of the two guide sleeves (302) coincide with the center lines of the two AGC displacement sensors respectively. An observation window (305) is provided in the middle position above the guide sleeve (302), and a small scale indicator line (306) is provided. The observation window (305) is a rectangular slot structure.

5. The external rolling mill AGC displacement sensor detection device according to claim 4, characterized in that: The push rod (4) is a stepped shaft structure. Its front end cylinder (401) is engaged with the plunger of the AGC displacement sensor, and the engagement method is the same as its installation engagement method on the AGC hydraulic cylinder. Its rear end cylinder (402) is engaged with the guide sleeve (302) of the guide sleeve (3). The push rod (4) slides in the guide sleeve (302) along the common axis of the two. The rear end cylinder (402) of the push rod (4) is provided with a large scale indicator line (403).

6. The external rolling mill AGC displacement sensor detection device according to claim 2, characterized in that: The radius of curvature of the arc surface above the arc base (1005) of the test platform (1) is consistent with the cylinder radius of the hydraulic jack (6). The hydraulic jack (6) is placed on the arc base (1005) of the test platform and positioned by the baffle (1006).

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