Walking beam double-positioning device control system for highline

Abstract

The utility model discloses a walking beam double-positioning device control system for highlines, which relates to the technical field of metal smelting, solves the problem that a walking beam cannot work due to failure of a unit displacement sensor, and comprises two lifting hydraulic cylinders for driving the walking beam to lift and two displacement sensors, the travel sensors are respectively mounted on the two lifting hydraulic cylinders to detect the travel of the lifting hydraulic cylinders; the analog quantity input module is electrically connected with the two displacement sensors; the identification unit is in communication connection with the analog quantity input module; and the judgment unit is respectively in communication connection with the identification unit and the switching unit. A double-displacement control system is adopted, namely, the two displacement sensors are installed on the lifting hydraulic cylinders on the two sides of the stepping beam respectively and used for measuring the strokes of the two lifting hydraulic cylinders, and when one displacement sensor goes wrong, the other displacement sensor can be rapidly switched to be used for control.

Description

Technical Field

[0001] The utility model relates to the field of metal smelting technology, in particular to a control system for a double-positioning device of a walking beam for high-speed wire. Background Technique

[0002] The walking beam is used for transporting steel billets in a heating furnace. Its components include: a walking mechanical device, a hydraulic driving device, and an electric control device. The action process is: the walking beam rises - the walking beam advances - the walking beam descends - the walking beam retreats. The rising and falling are realized by the electric control of the hydraulic proportional valve. The original design is a single-displacement control system. Specifically, a displacement sensor device is installed on one of the two lifting hydraulic cylinders to detect the stroke of the walking beam and interlock the control of the speed of the hydraulic cylinder driving device. The disadvantage of the single-displacement sensor control system is that once the displacement sensor device fails, the entire walking beam will not move. The control system of the displacement sensing device has a long processing and recovery time. If the processing is improper, the equipment failure will be enlarged, resulting in potential hazards to the equipment and restricting production. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and design a control system for a double-positioning device of a walking beam for high-speed wire, which solves the problem that the single-displacement sensor is prone to failure and causes the walking beam to be unable to work.

[0004] To achieve the above purpose, the technical solution of the utility model is a control system for a double-positioning device of a walking beam for high-speed wire, which includes two lifting hydraulic cylinders located on both sides of the walking beam respectively for driving the walking beam to rise and fall, and further includes:

[0005] Two displacement sensors, which are respectively installed on the two lifting hydraulic cylinders to detect the stroke of the lifting hydraulic cylinders;

[0006] An analog input module, which is electrically connected to the two displacement sensors respectively to receive the displacement signals from the two displacement sensors respectively. The analog input module has a switching unit for switching the displacement signals of the two displacement sensors;

[0007] An identification unit, which is communicatively connected to the analog input module, and the identification unit can identify the displacement signal;

[0008] A judgment unit, which is communicatively connected to the identification unit and the switching unit respectively. The judgment unit can judge whether the displacement signal is normal and feedback the result to the switching unit.

[0009] Preferably, it further includes a monitoring module, which is electrically connected to the analog input module and the driving mechanism respectively. The monitoring module can monitor the signals from the analog input module and feedback the results to the lifting hydraulic cylinder.

[0010] Preferably, the monitoring module has a storage unit. The monitoring module can compare the signals from the analog input module with the pre-stored data in the storage unit and feed back the comparison result to the lifting hydraulic cylinder.

[0011] Preferably, the lifting hydraulic cylinder includes a cylinder body and a telescopic rod located inside the cylinder body. The telescopic rod is fixedly connected to the walking beam.

[0012] Preferably, the displacement sensor used is a pull-rod type displacement sensor. The pull-rod type displacement sensor is located outside and parallel to the lifting hydraulic cylinder. The telescopic end of the pull-rod type displacement sensor is fixedly connected to the walking beam.

[0013] Preferably, the measuring range of the pull-rod type displacement sensor is not less than the stroke of the lifting hydraulic cylinder.

[0014] Compared with the prior art, its beneficial effects are as follows:

[0015] In the present utility model, a dual displacement control system is adopted, that is, two displacement sensors. The two displacement sensors are respectively installed on the lifting hydraulic cylinders on both sides of the walking beam and are respectively used to measure the strokes of the two lifting hydraulic cylinders. When one of the displacement sensors has a problem, the other displacement sensor can be quickly switched for use. The signals of the displacement sensors are connected to the analog input module, and the identification unit and the judgment unit identify and analyze the signals and feed back the analysis result to the switching unit. When there is a problem with the signal, it indicates that the displacement sensor has a fault. At this time, the switching unit will quickly switch to receive the signals of the other displacement sensor, so that the system can detect the stroke changes of the two lifting hydraulic cylinders in real time, and then control the lifting height of the walking beam, so that the production can continue without interruption, eliminating the hidden dangers of the equipment. The faulty system will be restored during weekly or monthly maintenance. The signals of the two displacement sensors are controlled separately, so the failure of one displacement sensor will not affect the other displacement sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the control system of the double-positioning device of the walking beam in the present utility model;

[0017] Figure 2 is a schematic structural diagram of the walking beam in the present utility model.

[0018] In the figure, 1. Displacement sensor; 2. Analog input module; 21. Switching unit; 3. Identification unit; 4. Judgment unit; 5. Monitoring module; 6. Storage unit; 7. Control mechanism; 8. Lifting hydraulic cylinder; 9. Walking beam. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figure 1 shown, a preferred embodiment of the present invention proposes a control system for a double-positioning device of a walking beam for high-speed wire. The control system mainly includes a driving mechanism, two lifting hydraulic cylinders 8, two displacement sensors 1, an analog input module 2, an identification unit 3, a judgment unit 4, and a monitoring unit. The driving mechanism is used to drive the walking beam 9 to move horizontally, and the two lifting hydraulic cylinders 8 are respectively located on both sides of the walking beam 9 and are used to control the rising and falling of the walking beam 9. A displacement sensor 1 is installed outside each lifting hydraulic cylinder 8 to detect the stroke of the two lifting hydraulic cylinders 8 respectively. The two lifting hydraulic cylinders 8 work synchronously, but the two displacement sensors 1 are controlled separately.

[0021] Referring to Figure 2 , the lifting hydraulic cylinder 8 is composed of a cylinder body and a telescopic rod. One end of the telescopic rod is fixedly connected to the bottom of the walking beam 9. Under the action of hydraulic pressure, the telescopic rod can move back and forth along the cylinder body, thereby driving the walking beam 9 to rise or fall. The walking beam 9 slides along an inclined plane. Therefore, when the lifting hydraulic cylinder 8 drives the walking beam 9 to move along the inclined plane, the height and horizontal position of the walking beam 9 will also change, so that the up and down and lateral movement of the walking beam 9 can be controlled.

[0022] In this embodiment, the displacement sensor 1 adopted is a pull-rod type displacement sensor, which has a pull rod that can move back and forth. The pull-rod type displacement sensor as a whole is parallel to the lifting hydraulic cylinder 8, and one end of the pull rod is also fixed to the bottom of the walking beam 9. That is to say, the pull rod of the pull-rod type displacement sensor will move back and forth together with the telescopic rod of the lifting hydraulic cylinder 8, so as to measure the stroke of the telescopic rod, and then obtain the up and down movement distance of the walking beam 9. The telescopic range of the pull rod of the pull-rod type displacement sensor is not less than the telescopic stroke of the telescopic rod of the lifting hydraulic cylinder 8, so that the stroke of the lifting hydraulic cylinder 8 can be measured.

[0023] As Figure 1 shown, the analog input module 2 is electrically connected to the two displacement sensors 1 respectively. The two displacement sensors 1 are controlled separately, and the two displacement sensors 1 will upload the measurement data to the analog input module 2 in real time. Inside the analog input module 2, there is a switching unit 21 for switching to receive the displacement signals of the two displacement sensors 1.

[0024] The above-mentioned recognition unit 3 is communicatively connected to the analog input module 2, and the judgment unit 4 is communicatively connected to the recognition unit 3 and the switching unit 21 respectively. After the analog input module 2 receives the displacement signal of a displacement sensor 1, it will send the displacement signal to the recognition unit 3. The recognition unit 3 will recognize the displacement signal to identify the position of the signal (i.e., which specific displacement sensor 1 the signal is from), and then the judgment unit 4 will analyze and process the signal to determine whether the displacement signal is normal (for example, abnormal data fluctuations, sudden increase or decrease in numerical values, or failure to receive the displacement signal, etc. all belong to abnormal signals). If the displacement signal is abnormal, it indicates that the displacement sensor 1 has a fault. The judgment unit 4 will send an instruction to the switching unit 21, and the switching unit 21 will switch to the displacement signal of another displacement sensor 1 and analyze and process the displacement signal according to the above steps.

[0025] If the analog input module 2 does not receive the signal of the displacement sensor 1, the system will default that the displacement sensor 1 has a fault, and the judgment unit 4 will also send an instruction to the switching unit 21 to switch to the displacement signal of another displacement sensor 1. This can ensure that once a certain displacement sensor 1 fails, it will quickly switch to the displacement signal of another displacement sensor 1 for seamless connection, so that production can continue without interruption. In this way, it will not cause the system to fail to react due to the failure of a displacement sensor 1, and the walking beam 9 will continue to move.

[0026] The monitoring module 5 is electrically connected to the analog input module 2 and the control mechanisms 7 of the two lifting hydraulic cylinders 8 respectively. The control mechanism 7 controls the operation of the lifting hydraulic cylinders 8. Since the signals of the two displacement sensors 1 can be quickly switched, the analog input module 2 will send the normal signal to the monitoring module 5. The monitoring module 5 can monitor the signal from the analog input module 2 and feedback the result to the lifting hydraulic cylinder 8. The monitoring module 5 has a storage unit 6 inside, and the storage unit 6 stores the relevant data of the normal displacement signal. The monitoring module 5 can compare the signal from the analog input module 2 with the pre-stored data in the storage unit 6 to monitor whether the stroke of the lifting hydraulic cylinder 8 reaches the set value and feedback the result to the control mechanism 7 of the lifting hydraulic cylinder 8.

[0027] If neither of the two displacement sensors 1 fails, or one of the displacement sensors 1 fails, the signal sent by the analog input module 2 to the monitoring module 5 is a normal signal. The monitoring module 5 will compare the normal displacement signal with the data in the storage unit 6 to determine whether the stroke of the lifting hydraulic cylinder 8 reaches the set value, so as to obtain the lifting height of the walking beam 9, and then send the result to the control mechanism 7 of the lifting hydraulic cylinder 8. When the height of the walking beam 9 reaches the predetermined height, the control mechanism 7 controls the lifting hydraulic cylinder 8 to stop working, otherwise it works normally.

[0028] If both of the two displacement sensors 1 fail, the analog input module 2 will not receive the displacement signal at this time. Meanwhile, the monitoring module 5 will not receive the signal from the analog input module 2 either. At this time, the monitoring module 5 will feedback a signal to the control mechanism 7 of the lifting hydraulic cylinder 8, and the control mechanism 7 will control the lifting hydraulic cylinder 8 to stop working.

[0029] The above technical solution only reflects the preferred technical solution of the technical solution of the present invention. Some changes that those skilled in the art may make to some parts thereof all reflect the principle of the present invention and fall within the protection scope of the present invention.

Claims

1. A control system for a dual positioning device of a walking beam for a high-speed line, comprising two lifting hydraulic cylinders (8) respectively located on both sides of a walking beam (9) for driving the walking beam (9) to rise and fall, characterized in that: Also includes: Two displacement sensors (1) are respectively mounted on two lifting hydraulic cylinders (8) to detect the stroke of the lifting hydraulic cylinders (8); An analog quantity input module (2) is electrically connected to the two displacement sensors (1) respectively to receive displacement signals from the two displacement sensors (1) respectively, and the analog quantity input module (2) has a switching unit (21) for switching the displacement signals of the two displacement sensors (1); an identification unit (3), the identification unit (3) being communicatively connected to the analog quantity input module (2), and the identification unit (3) being capable of identifying the displacement signal; A judgment unit (4), wherein the judgment unit (4) is respectively connected to the identification unit (3) and the switching unit (21) for communication, and the judgment unit (4) is capable of judging whether the displacement signal is normal and feeding back the result to the switching unit (21).

2. The control system of the high-speed wire walking beam double positioning device according to claim 1 is characterized in that: It also includes a monitoring module (5), which is electrically connected to the analog input module (2) and the driving mechanism respectively, and the monitoring module (5) is capable of monitoring the signal from the analog input module (2) and feeding back the result to the lifting hydraulic cylinder (8).

3. The control system of the high-speed wire walking beam double positioning device according to claim 2 is characterized in that: The monitoring module (5) has a storage unit (6) therein, and the monitoring module (5) is capable of comparing the signal from the analog input module (2) with the pre-stored data in the storage unit (6), and feeding back the comparison result to the lifting hydraulic cylinder (8).

4. The control system of the high-speed wire walking beam double positioning device according to claim 1 is characterized in that: The lifting hydraulic cylinder (8) comprises a cylinder body and a telescopic rod located in the cylinder body, and the telescopic rod is fixedly connected to the walking beam (9).

5. The control system of the high-speed wire walking beam double positioning device according to claim 4 is characterized in that: The displacement sensor (1) is a pull rod type displacement sensor, which is located outside the lifting hydraulic cylinder (8) and parallel to it, and the telescopic end of the pull rod type displacement sensor is fixedly connected to the stepping beam (9).

6. The control system of the high-speed wire walking beam double positioning device according to claim 5 is characterized in that: The measuring range of the pull rod type displacement sensor is not less than the stroke of the lifting hydraulic cylinder (8).

Images