Vacuum carrier roller hydraulic loading device controlled by PLC

Abstract

The utility model discloses a vacuum carrier roller hydraulic loading device controlled by a PLC (Programmable Logic Controller), which comprises a main frame, a cantilever beam frame is fixed on one side of the front of the main frame, a group of rocker arms are rotatably arranged on one side of the cantilever beam frame, a vacuum carrier roller is rotatably arranged between the rocker arms, each group of rocker arms is driven by a group of independent power components, and the vacuum carrier roller is driven by the power components. The power assembly is cooperatively controlled through a PLC and a proportional valve, and the vacuum carrier roller is rotationally arranged between the two rocker arms and limited through a first drawing block. According to the hydraulic loading device for the vacuum carrier roller, through coordinated control of the PLC and the proportional valve, the linear stability of pressurization of the carrier roller of a wide-paper-web high-speed paper machine can be improved, the purpose of rapid dehydration and drying of pressurization of the carrier roller is guaranteed, and the wet paper dehydration efficiency is improved to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of idler roller technology, and in particular to a vacuum idler roller hydraulic loading device controlled by a PLC. Background Technology

[0002] Vacuum idler press section control requirements: The main function of the vacuum idler press section is to reduce the moisture content of the wet end of the paper web through mechanical compression, increase the dryness of the paper web when it enters the drying section, and accelerate the rapid drying of the wet paper. This structure uses vacuum idler press to press the wet paper, and the magnitude of the linear pressure has a significant impact on the press dewatering. Increasing the press linear pressure significantly improves the press dewatering efficiency; however, increasing the linear pressure often leads to increased felt loss, paper breaks, and uneven moisture content, and is also limited by the strength of the wet paper web itself. Therefore, improving the stability of the press section linear pressure is particularly important. In our traditional paper machine equipment, idler press mainly uses pneumatic pressure and simple hydraulic pressure methods. Due to the instability of the pressure circuit, it cannot meet the design requirements of paper machines with wide paper webs and high machine speeds. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model proposes a PLC-controlled vacuum idler hydraulic loading device. This device, through coordinated control of the PLC and proportional valve, can improve the linear stability of idler pressurization on wide-width high-speed paper machines, ensuring the purpose of rapid dewatering and drying through idler pressurization, and to a certain extent improving the dewatering efficiency of wet paper.

[0004] A PLC-controlled vacuum roller hydraulic loading device includes a main frame, a cantilever beam frame fixed to one side of the front of the main frame, a set of rocker arms rotatably mounted on one side of the cantilever beam frame, and a vacuum roller rotatably mounted between the rocker arms. Each set of rocker arms is driven by an independent power component, which is controlled by a PLC and a proportional valve. The vacuum roller is rotatably mounted between two sets of rocker arms and is limited by a pull-out block.

[0005] As a preferred embodiment of the above technical solution, the power assembly includes a loading hydraulic cylinder, the two ends of which are respectively connected to the cantilever beam frame and the rocker arm through a set of hinge seats.

[0006] As a preferred embodiment of the above technical solution, one side of the vacuum roller is also connected to a roller drain outlet.

[0007] As a preferred embodiment of the above technical solution, the main frame is composed of two sets of parallel uprights.

[0008] As a preferred embodiment of the above technical solution, a hydraulic jack for adjusting the height is installed at the bottom of the cantilever beam frame, and the cantilever beam frame and the main frame are limited by a pull-out block two.

[0009] As a preferred embodiment of the above technical solution, an auxiliary positioning frame is also installed on one side of the cantilever beam frame.

[0010] As a preferred embodiment of the above technical solution, the auxiliary positioning frame includes a positioning base, on which a screw is vertically positioned. The screw passes through the cantilever beam frame and is locked at the top by a nut.

[0011] The beneficial effects of this utility model are as follows:

[0012] The vacuum idler roller pressurization control uses a hydraulic control system as the power source. Through coordinated control of PLC and proportional valve, it can improve the linear stability of idler roller pressurization on wide-width high-speed paper machines, ensure the purpose of rapid dewatering and drying of idler roller pressurization, and improve the dewatering efficiency of wet paper to a certain extent. Attached Figure Description

[0013] Figure 1 This is the front view of the device of this utility model.

[0014] Figure 2 This is a side view of the device of this utility model.

[0015] Figure 3 This is a schematic diagram of the present invention.

[0016] The attached diagram is labeled as follows: 1-Main frame, 2-Cantilever beam frame, 3-Rocker arm, 4-Vacuum roller, 5-Power unit, 501-Loading hydraulic cylinder, 502-Hinge seat, 6-Pull-out block one, 7-Roller drain outlet, 8-Hydraulic jack, 9-Pull-out block two, 10-Auxiliary positioning frame, 1001-Positioning base, 1002-Screw, 1003-Nut. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] like Figure 1 , Figure 2 The aforementioned PLC-controlled vacuum roller hydraulic loading device includes a main frame 1, a cantilever beam frame 2 fixed to one side of the front of the main frame 1, a set of rocker arms 3 rotatably mounted on one side of the cantilever beam frame 2, and a vacuum roller 4 rotatably mounted between the rocker arms 3. Each set of rocker arms 3 is driven by an independent power component 5, which is controlled by a PLC and a proportional valve. The vacuum roller 4 is rotatably mounted between two sets of rocker arms 3 and is limited by a pull block 6.

[0019] In this embodiment, the power assembly 5 includes a loading hydraulic cylinder 501, and the two ends of the loading hydraulic cylinder 501 are respectively connected to the cantilever beam frame 2 and the rocker arm 3 through a set of hinge seats 502.

[0020] In this embodiment, a roller drain outlet 7 is also connected to one side of the vacuum roller 4.

[0021] In this embodiment, the main frame 1 is composed of two sets of uprights arranged in parallel.

[0022] In this embodiment, a hydraulic jack 8 for height adjustment is installed at the bottom of the cantilever beam frame 2, and the cantilever beam frame 2 and the main frame 1 are limited by a pull-out block 9.

[0023] In this embodiment, an auxiliary positioning frame 10 is also installed on one side of the cantilever beam frame 2.

[0024] In this embodiment, the auxiliary positioning frame 10 includes a positioning base 1001, on which a screw 1002 is vertically positioned. The screw 1002 passes through the cantilever beam frame 2 and is locked at the top by a nut 1003.

[0025] The working process of pressing the idler roller is as follows Figure 3 As shown:

[0026] The vacuum roller 4 pressurization control adopts advanced PLC-controlled electro-hydraulic proportional closed-loop control technology. It controls two sets of loading hydraulic cylinders 501 to synchronously raise and lower the operating and transmission sides of the pressurization zone, providing zoned pressurization. The pressurization pressure on both sides of the vacuum roller 4 can be adjusted separately according to the working conditions, with the PLC automatically tracking and adjusting accordingly. The pressurization pressure is achieved by a proportional valve automatically controlled by the PLC. The proportional valve body is mounted on the hydraulic control module. The pressure is detected and fed back to the PLC on the control panel by a pressure sensor. During pressurization, the PLC outputs a preset voltage, and the proportional valve outputs a certain oil pressure according to the set voltage. Changing the oil pressure changes the linear pressure value. The pressure sensor measures and provides feedback on the pressure output of the proportional valve. The PLC compares the linear pressure of the press roller with the preset linear pressure curve range value through the feedback data from the pressure sensor, and adjusts it through the proportional valve. This ensures that the linear pressure automatically operates within the set fluctuation range during normal paper machine operation. In case of machine stoppage or emergency failure, the PLC interlocks to quickly disengage the vacuum roller to reduce roller wear and ensure normal paper machine operation. The control panel is made of 304 stainless steel with a piano-style sloping design and includes an emergency release button with a cover. Both release and pressurization send signals to the main drive. The control panel is equipped with alarms for oil pressure, line pressure, liquid level, oil temperature, and blockage. The touchscreen interface features micro-pressure increase and decrease buttons with adjustable steps. It has interface lock and unlock password access functions. The press section operates as follows: rapid lifting, slow contact, stable, low-speed pre-pressing (contact), and pressure holding (with pressure compensation and adjustment by the PLC during operation). In case of machine stoppage or emergency (emergency stop), the MCS interlock quickly disengages.

[0027] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum roll hydraulic loading device controlled by PLC, characterized in that: The main frame is provided with a cantilever beam frame on one side in front of the main frame, a group of rocker arms are rotatably arranged on one side of the cantilever beam frame, and vacuum rollers are rotatably arranged between the rocker arms.

2. The hydraulic loading device for vacuum roll controlled by PLC according to claim 1, characterized in that: The power assembly comprises a loading hydraulic cylinder, and two ends of the loading hydraulic cylinder are connected with the cantilever beam frame and the rocker arms through a group of hinged seats respectively.

3. The hydraulic loading device for vacuum roll controlled by PLC according to claim 1, characterized in that: One side of the vacuum roller is also provided with a roller drainage port.

4. The hydraulic loading device for vacuum roll controlled by PLC according to claim 1, characterized in that: The main frame is composed of two groups of vertical frames arranged in parallel.

5. The hydraulic loading device for vacuum roll controlled by PLC according to claim 4, characterized in that: A hydraulic jack for adjusting the height is arranged at the bottom of the cantilever beam frame, and the cantilever beam frame and the main frame are limited by pull block two.

6. The hydraulic loading device for vacuum roll controlled by PLC according to claim 5, characterized in that: One side of the cantilever beam frame is also provided with an auxiliary positioning frame.

7. The hydraulic loading device for vacuum roll controlled by PLC according to claim 6, characterized in that: The auxiliary positioning frame comprises a positioning base, a screw rod is vertically arranged on the positioning base, the screw rod penetrates through the cantilever beam frame, and the top of the screw rod is locked by a nut.

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