Electric control system for controlling hot rolling oil pump

Abstract

The utility model relates to the technical field of electric control systems, and discloses an electric control system for controlling a hot rolling oil pump, which comprises a PLC (Programmable Logic Controller)-controlled hydraulic station starting, stopping and alarming program, a PLC-controlled hydraulic cylinder operation display program, a PLC-controlled hydraulic cylinder piston displacement sensor and a hydraulic pump proportional valve, and an oil pump stop switch connected in parallel with the power supply is arranged in the hydraulic station starting, stopping and alarming program controlled by the PLC. According to the hydraulic oil injection device, the pedal switch is treaded down, the hydraulic pump is started, the hydraulic cylinder piston moves downwards to inject oil, the oil injection is finished when the hydraulic cylinder piston reaches the lowest position, the hydraulic cylinder piston automatically reverses and ascends to the highest position, the oil injection work is finished, and the hydraulic pump stops working. According to the device, the oil injection efficiency of the bearing seat is improved through the quantitative oil injection pump for the working roller bearing seat between the hot rolling grinding rollers, quantitative oil injection can be achieved after testing, unnecessary waste is avoided, and the difficulty of lean management between a hot rolling production line and the grinding rollers can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric control systems, and more specifically to an electric control system for controlling a hot rolling oil pump. Background Art

[0002] The hot rolling oil pump is an important part of the hot rolling hydraulic system. It is mainly responsible for providing pressure oil to the hydraulic system to ensure the normal operation of the hot rolling mill. The hot rolling oil pump generally adopts a high-pressure plunger pump or a gear pump, which has the characteristics of high pressure, large flow and high efficiency. During the hot rolling process, the hydraulic system needs to provide sufficient power for the working rolls, support rolls, and press-down devices to ensure the stability of rolling and product quality. In order to ensure the normal operation of the hot rolling oil pump, it is necessary to regularly maintain and service the hydraulic system, including replacing worn parts, cleaning the oil tank, and replacing the filter element. At the same time, it is also necessary to monitor and adjust the pressure and flow parameters of the hydraulic system to ensure the stability and reliability of the system. In short, the hot rolling oil pump is an important part of the hot rolling hydraulic system, which has an important impact on the normal operation of the hot rolling mill and the quality of the product.

[0003] Generally, a hot rolling oil pump adopts a plunger type oil pump when oiling. This plunger type oil pump has a small plunger diameter and a short stroke. The bearing seat is oiled by the reciprocating motion of the plunger. It takes 10 minutes to oil a bearing seat (about 30 minutes in winter). The oiling time is long. The hot rolling working roll is an open bearing. Since the oil pump has no oil filling amount display, the site requires that the oil filling be based on the oil overflow hole of the bearing seat or the water seal oil overflow at both ends of the bearing seat as the oil filling amount standard. Therefore, it needs to be modified and optimized. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an electronic control system for controlling a hot rolling oil pump, which has the advantages of high efficiency and easy management.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: an electronic control system for hot rolling oil pump control, the electronic control system includes a PLC-controlled hydraulic station start, stop and alarm program, a PLC-controlled hydraulic cylinder operation display program, a PLC-controlled hydraulic cylinder piston displacement sensor and a hydraulic pump proportional valve;

[0006] The PLC-controlled hydraulic station start, stop and alarm program includes an oil pump stop switch connected in parallel with the power supply, an oil pump start switch, a foot switch, an emergency stop switch on the electric cabinet side, an emergency stop switch on the oil cylinder side, a filter, a minimum oil level switch, an oil pump protection switch, an oil cylinder side and an electric cabinet side;

[0007] The PLC-controlled hydraulic cylinder operation display program includes an oil pump stop switch connected in parallel with a power supply, an oil pump start switch, an oil pump, a green light, a yellow light and a red light. The oil pump stop switch and the oil pump start switch are connected in parallel, the oil pump stop switch and the red light are connected in parallel, the red light and the yellow light are connected in parallel, the yellow light and the green light are connected in parallel, and the green light and the oil pump are connected in parallel.

[0008] The PLC-controlled hydraulic cylinder piston displacement sensor and hydraulic pump proportional valve include a displacement sensor and a proportional valve connected in series with a power source, and the displacement sensor and the proportional valve are connected in parallel.

[0009] As a preferred technical solution of the utility model, the oil pump stop switch and the oil pump start switch are connected in parallel, the oil pump start switch and the foot switch are connected in parallel, the foot switch and the switch on the emergency stop power cabinet side are connected in parallel, the switch on the emergency stop power cabinet side and the switch on the emergency stop cylinder side are connected in series, the emergency stop cylinder side switch and the filter are connected in parallel, the filter and the minimum oil level switch are connected in parallel, the minimum oil level switch and the oil pump protection switch are connected in parallel, the oil pump protection switch and the cylinder side are connected in parallel, and the cylinder side and the electric cabinet side are connected in parallel.

[0010] As a preferred technical solution of the utility model, the emergency stop power cabinet side switch and the emergency stop cylinder side switch inside the PLC-controlled hydraulic station start, stop and alarm program are connected in series, and the emergency stop power cabinet side switch and the emergency stop cylinder side switch are connected in parallel with other components inside the PLC-controlled hydraulic station start, stop and alarm program.

[0011] As a preferred technical solution of the utility model, the internal design of the PLC-controlled hydraulic station start, stop and alarm program has two emergency stop programs, namely the emergency stop power cabinet side switch and the emergency stop cylinder side switch. The emergency stop power cabinet side switch and the emergency stop cylinder side switch have the same function, but act on two objects respectively.

[0012] As a preferred technical solution of the utility model, the cylinder side and the electric cabinet side inside the PLC-controlled hydraulic station start, stop and alarm program are connected in series, and the cylinder side and the electric cabinet side are connected in parallel with other components inside the PLC-controlled hydraulic station start, stop and alarm program.

[0013] As a preferred technical solution of the utility model, the internal design of the hydraulic cylinder operation display program controlled by the PLC has three lights, namely a green light, a yellow light and a red light, each having a different function.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model starts the hydraulic pump by stepping on the foot switch, and the hydraulic cylinder piston moves downward to fill oil. When the hydraulic cylinder piston reaches the lowest position, the oil filling is completed, and the hydraulic cylinder piston automatically reverses and rises to the highest position. The oil filling work is completed and the hydraulic pump stops working. Compared with the traditional device, the device improves the oil filling efficiency of the bearing seat through the quantitative oil filling pump of the bearing seat of the working roll in the hot rolling mill roll room. After testing, quantitative oil filling can be achieved to avoid unnecessary waste, and the difficulty of lean management of the hot rolling production line and the mill roll room can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the start, stop and alarm procedures of the hydraulic station controlled by PLC of the utility model;

[0018] Figure 3 This is a schematic diagram of the hydraulic cylinder operation display program controlled by PLC of the utility model;

[0019] Figure 4 This is a schematic diagram of the hydraulic cylinder piston displacement sensor and hydraulic pump proportional valve controlled by PLC in the utility model.

[0020] In the figure: 1. PLC-controlled hydraulic station start, stop and alarm procedures; 2. PLC-controlled hydraulic cylinder operation display program; 3. PLC-controlled hydraulic cylinder piston displacement sensor and hydraulic pump proportional valve; 4. Oil pump stop switch; 5. Oil pump start switch; 6. Foot switch; 7. Emergency stop switch on the cabinet side; 8. Emergency stop switch on the cylinder side; 9. Filter; 10. Minimum oil level switch; 11. Oil pump protection switch; 12. Oil pump; 13. Green light; 14. Yellow light; 15. Red light; 16. Displacement sensor; 17. Proportional valve; 18. Cylinder side; 19. Cabinet side. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1 to 4 As shown, the utility model provides an electronic control system for hot rolling oil pump control, which includes a PLC-controlled hydraulic station start, stop and alarm program 1, a PLC-controlled hydraulic cylinder operation display program 2, a PLC-controlled hydraulic cylinder piston displacement sensor and a hydraulic pump proportional valve 3;

[0023] The PLC-controlled hydraulic station start, stop and alarm program 1 includes an oil pump stop switch 4 connected in parallel with the power supply, an oil pump start switch 5, a foot switch 6, an emergency stop switch on the electric cabinet side 7, an emergency stop switch on the oil cylinder side 8, a filter 9, a minimum oil level switch 10, an oil pump protection switch 11, an oil cylinder side 18 and an electric cabinet side 19;

[0024] The PLC-controlled hydraulic cylinder operation display program 2 includes an oil pump stop switch 4 connected in parallel with a power supply, an oil pump start switch 5, an oil pump 12, a green light 13, a yellow light 14 and a red light 15. The oil pump stop switch 4 and the oil pump start switch 5 are connected in parallel, the oil pump stop switch 4 and the red light 15 are connected in parallel, the red light 15 and the yellow light 14 are connected in parallel, the yellow light 14 and the green light 13 are connected in parallel, and the green light 13 and the oil pump 12 are connected in parallel.

[0025] The PLC-controlled hydraulic cylinder piston displacement sensor and hydraulic pump proportional valve 3 include a displacement sensor 16 and a proportional valve 17 connected in series with a power source, and the displacement sensor 16 and the proportional valve 17 are connected in parallel.

[0026] The PLC setting makes the hydraulic cylinder piston always in the highest position. When the staff steps on the foot switch 6, the hydraulic pump starts, the hydraulic cylinder piston moves downward to fill oil, the hydraulic cylinder piston reaches the lowest position and the filling oil ends, the hydraulic cylinder piston automatically reverses and rises to the highest position, the filling oil work is completed, and the hydraulic pump stops working. In this workflow, when the program edited by the PLC receives the filling oil work instruction from the foot switch 6, it controls the start, reversal and stop of the hydraulic pump. During the operation of the hydraulic cylinder, the displacement sensor 16 feeds back the accurate position information to the PLC, and the circuit is set by the PLC to display as a three-color light. When the hydraulic cylinder piston rises to the position, the yellow light 14 flashes, and when it falls to the position, the green light 13 flashes. Among them, when the three-color light shows that the red light 15 flashes, it is an alarm signal. The output is set by the PLC program to control the opening size of the proportional valve 17, and then control the running speed of the cylinder side 18.

[0027] By stepping on the foot switch 6, the hydraulic pump is started, the hydraulic cylinder piston moves downward to inject oil, the hydraulic cylinder piston reaches the lowest position and the oil injection is completed, the hydraulic cylinder piston automatically reverses and rises to the highest position, the oil injection work is completed, and the hydraulic pump stops working. Compared with the traditional device, the device improves the oil injection efficiency of the bearing seat through the quantitative oil injection pump of the working roll bearing seat in the hot rolling mill roll room. After testing, quantitative oil injection can be achieved to avoid unnecessary waste and reduce the difficulty of lean management of the hot rolling production line and the mill roll room.

[0028] Among them, the oil pump stop switch 4 and the oil pump start switch 5 are connected in parallel, the oil pump start switch 5 and the foot switch 6 are connected in parallel, the foot switch 6 and the emergency stop cabinet side switch 7 are connected in parallel, the emergency stop cabinet side switch 7 and the emergency stop cylinder side switch 8 are connected in series, the emergency stop cylinder side switch 8 and the filter 9 are connected in parallel, the filter 9 and the minimum oil level switch 10 are connected in parallel, the minimum oil level switch 10 and the oil pump protection switch 11 are connected in parallel, the oil pump protection switch 11 and the cylinder side 18 are connected in parallel, and the cylinder side 18 and the electric cabinet side 19 are connected in parallel.

[0029] The oil pump can be started by turning on the oil pump stop switch 4, and the oil pump stop switch 4 will be automatically closed by turning on the oil pump start switch 5, so that the oil pump can be turned off.

[0030] Among them, the emergency stop cabinet side switch 7 and the emergency stop cylinder side switch 8 inside the PLC-controlled hydraulic station start, stop and alarm program 1 are connected in series, and the emergency stop cabinet side switch 7 and the emergency stop cylinder side switch 8 are connected in parallel with other components inside the PLC-controlled hydraulic station start, stop and alarm program 1.

[0031] It can better perform emergency stop on the electric cabinet and oil pump, protect the system and avoid unnecessary damage to the system.

[0032] Among them, the internal design of the PLC-controlled hydraulic station start, stop and alarm program 1 has two emergency stop programs, namely the emergency stop cabinet side switch 7 and the emergency stop cylinder side switch 8. The emergency stop cabinet side switch 7 and the emergency stop cylinder side switch 8 have the same function, but act on two objects respectively.

[0033] Emergency stop is performed on the electric cabinet and the oil pump respectively to protect the oil pump and the electric cabinet, and to facilitate the later use of the entire device.

[0034] Among them, the cylinder side 18 and the electric cabinet side 19 inside the PLC-controlled hydraulic station start, stop and alarm program 1 are connected in series, and the cylinder side 18 and the electric cabinet side 19 are connected in parallel with other components inside the PLC-controlled hydraulic station start, stop and alarm program 1.

[0035] The entire device can be controlled through the electrical cabinet side 19 to regulate the operation of the entire device.

[0036] Among them, the internal design of the hydraulic cylinder operation display program 2 controlled by the PLC is provided with three lights, namely a green light 13, a yellow light 14 and a red light 15, which have different functions respectively.

[0037] The yellow light 14 flashes when the piston rises to the right position, the green light 13 flashes when the piston descends to the right position, and the red light 15 flashes when there is an alarm signal.

[0038] The working principle and use process of this utility model:

[0039] The PLC setting makes the hydraulic cylinder piston always in the highest position. When the staff steps on the foot switch 6, the hydraulic pump starts, the hydraulic cylinder piston moves downward to fill oil, the hydraulic cylinder piston reaches the lowest position and the filling oil ends, the hydraulic cylinder piston automatically reverses and rises to the highest position, the filling oil work is completed, and the hydraulic pump stops working. In this workflow, when the program edited by the PLC receives the filling oil work instruction from the foot switch 6, it controls the start, reversal and stop of the hydraulic pump. During the operation of the hydraulic cylinder, the displacement sensor 16 feeds back the accurate position information to the PLC, and the circuit is set by the PLC to display as a three-color light. When the hydraulic cylinder piston rises to the position, the yellow light 14 flashes, and when it falls to the position, the green light 13 flashes. Among them, when the three-color light shows that the red light 15 flashes, it is an alarm signal. The output is set by the PLC program to control the opening size of the proportional valve 17, and then control the running speed of the cylinder side 18.

[0040] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronic control system for hot rolling oil pump control, characterized in that: The electronic control system includes a PLC-controlled hydraulic station start, stop and alarm program (1), a PLC-controlled hydraulic cylinder operation display program (2), a PLC-controlled hydraulic cylinder piston displacement sensor and a hydraulic pump proportional valve (3); The PLC-controlled hydraulic station start, stop and alarm program (1) includes an oil pump stop switch (4) connected in parallel with a power supply, an oil pump start switch (5), a foot switch (6), an emergency stop switch on the electric cabinet side (7), an emergency stop switch on the oil cylinder side (8), a filter (9), a minimum oil level switch (10), an oil pump protection switch (11), an oil cylinder side (18) and an electric cabinet side (19); The PLC-controlled hydraulic cylinder operation display program (2) includes an oil pump stop switch (4) connected in parallel with a power supply, an oil pump start switch (5), an oil pump (12), a green light (13), a yellow light (14) and a red light (15), wherein the oil pump stop switch (4) and the oil pump start switch (5) are connected in parallel, the oil pump stop switch (4) and the red light (15) are connected in parallel, the red light (15) and the yellow light (14) are connected in parallel, the yellow light (14) and the green light (13) are connected in parallel, and the green light (13) and the oil pump (12) are connected in parallel; The PLC-controlled hydraulic cylinder piston displacement sensor and hydraulic pump proportional valve (3) include a displacement sensor (16) and a proportional valve (17) connected in series with a power source, and the displacement sensor (16) and the proportional valve (17) are connected in parallel.

2. The electronic control system for hot rolling oil pump control according to claim 1, characterized in that: The oil pump stop switch (4) and the oil pump start switch (5) are connected in parallel, the oil pump start switch (5) and the foot switch (6) are connected in parallel, the foot switch (6) and the emergency stop cabinet side switch (7) are connected in parallel, the emergency stop cabinet side switch (7) and the emergency stop cylinder side switch (8) are connected in series, the emergency stop cylinder side switch (8) and the filter (9) are connected in parallel, the filter (9) and the minimum oil level switch (10) are connected in parallel, the minimum oil level switch (10) and the oil pump protection switch (11) are connected in parallel, the oil pump protection switch (11) and the oil cylinder side (18) are connected in parallel, and the oil cylinder side (18) and the cabinet side (19) are connected in parallel.

3. The electronic control system for hot rolling oil pump control according to claim 1, characterized in that: The emergency stop cabinet side switch (7) and the emergency stop cylinder side switch (8) inside the PLC-controlled hydraulic station start, stop and alarm program (1) are connected in series, and the emergency stop cabinet side switch (7) and the emergency stop cylinder side switch (8) are connected in parallel with other components inside the PLC-controlled hydraulic station start, stop and alarm program (1).

4. The electronic control system for hot rolling oil pump control according to claim 1, characterized in that: The PLC-controlled hydraulic station start, stop and alarm program (1) is internally designed with two emergency stop programs, namely, an emergency stop cabinet side switch (7) and an emergency stop cylinder side switch (8). The emergency stop cabinet side switch (7) and the emergency stop cylinder side switch (8) have the same function, but act on two objects respectively.

5. The electronic control system for hot rolling oil pump control according to claim 1, characterized in that: The oil cylinder side (18) and the electric cabinet side (19) inside the PLC-controlled hydraulic station start, stop and alarm program (1) are connected in series, and the oil cylinder side (18) and the electric cabinet side (19) are connected in parallel with other components inside the PLC-controlled hydraulic station start, stop and alarm program (1).

6. The electronic control system for hot rolling oil pump control according to claim 1, characterized in that: The PLC-controlled hydraulic cylinder operation display program (2) is internally designed with three lights, namely a green light (13), a yellow light (14) and a red light (15), each having a different function.

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