Hydraulic system for trimming module of paper pulp molding machine

Abstract

The utility model is suitable for the technical field of hydraulic systems, and provides a paper pulp molding machine trimming module hydraulic system which comprises a trimming oil cylinder and a connecting template, and the template is closed with a lower template through downward movement of the trimming oil cylinder to achieve trimming forming of a product. The system further comprises an overflow safety valve, a load balance valve and a third electromagnetic directional valve. The electromagnetic directional valve I is used for controlling the up-and-down movement of the template; the second electromagnetic directional valve, the first cartridge valve and the second cartridge valve work cooperatively to form a differential oil way so as to accelerate the descending speed of the template; the overflow valve is used for limiting the maximum working pressure of the system; the system comprises a servo power and rapid mold lifting control module, an energy storage and control module, a pressure monitoring and display module and an oil management and maintenance module. By integrating the advantages of safety, rapidity, stability, high efficiency, cost control and the like, an advanced hydraulic solution is provided for the edge cutting module of the paper pulp molding machine, and the production efficiency and the operation safety of equipment are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic systems, in particular to a hydraulic system for a trimming module of a pulp molding machine. Background Art

[0002] At present, research and development in the field of domestic pulp molding technology is moving towards multiple optimization goals, aiming to significantly improve the production efficiency of equipment, significantly reduce energy consumption, and enhance the automation and intelligence level of equipment.

[0003] In existing industrial applications, many mechanical devices rely on gravity to lower the mold. This method often poses certain safety risks and requires the addition of a small fuel tank to assist operation, making the overall assembly process more complicated. Other devices use a simple reversing control system to achieve mold movement conversion, but this method results in a longer operation cycle, which in turn affects production efficiency. In addition, there are fully electrically controlled mechanical systems that can achieve efficient energy utilization and faster operation speeds, but their high cost limits their wider application. To address the above problems, a new hydraulic oil circuit system has emerged that integrates safety, speed, stability, and high efficiency. It can improve equipment production efficiency, reduce production energy consumption, and control equipment costs. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic system for a trimming module of a pulp molding machine, aiming to solve the problems raised in the above background technology.

[0005] The embodiment of the utility model is implemented as follows: a hydraulic system for a trimming module of a pulp molding machine includes a trimming oil cylinder, the trimming oil cylinder is connected to a template, and the template is closed with the lower template by the downward movement of the trimming oil cylinder to achieve trimming and molding of the product; and further includes:

[0006] Overflow safety valve, used to limit the pressure in the lower chamber of the trimming cylinder;

[0007] A load balancing valve and a third electromagnetic reversing valve, wherein the load balancing valve is used to open under specific conditions to balance the load; the third electromagnetic reversing valve is used to control the pilot oil of the balancing valve;

[0008] Solenoid reversing valve 1, used to control the up and down movement of the template;

[0009] Solenoid reversing valve 2, cartridge valve 1 and cartridge valve 2 work together to form a differential oil circuit to speed up the template's downward movement;

[0010] The overflow valve, as a system safety valve, is used to limit the maximum working pressure of the system;

[0011] Servo power, as the power source of the system, is used to provide hydraulic energy;

[0012] Rapid mold raising control module, used to realize rapid mold raising of templates;

[0013] Energy storage and control module, used for storing, controlling and charging energy;

[0014] Pressure monitoring and display module, used for real-time monitoring, feedback and display of system pressure and external control oil pressure;

[0015] The oil management and maintenance module is used to manage and maintain the oil in the hydraulic system.

[0016] Furthermore, the rapid mold raising control module includes:

[0017] Solenoid reversing valve 4, used to control the flow direction of oil in the hydraulic system by receiving electrical signals;

[0018] The hydraulically controlled one-way valve and the electromagnetic reversing valve enable the template to rise quickly by opening the hydraulically controlled one-way valve.

[0019] Furthermore, the energy storage and control module includes:

[0020] Accumulator, used to store energy and provide externally controlled pilot oil;

[0021] Cartridge solenoid valve, used to control the discharge of accumulator;

[0022] One-way valve, used by the system to charge the accumulator.

[0023] Furthermore, the pressure monitoring and display module includes:

[0024] Pressure sensor, used to detect and feedback system pressure;

[0025] Pressure gauge 1, used to display system pressure;

[0026] Pressure gauge 2 is used to display the external control oil pressure.

[0027] Furthermore, the oil management and maintenance module includes:

[0028] Cooler, connected to external cooling water, used to cool the hydraulic oil returning to the tank;

[0029] Liquid level gauge, used to display the oil height;

[0030] Oil suction filter, used to filter oil;

[0031] Air filter, used to filter air when the oil level changes.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] The hydraulic system of the pulp molding machine trimming module integrates the advantages of safety, speed, stability, efficiency and cost control, providing an advanced hydraulic solution for the pulp molding machine trimming module, significantly improving the production efficiency and operational safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the hydraulic principle diagram of the hydraulic system of the trimming module of the pulp molding machine.

[0035] In the figure: trimming cylinder 1, template 2, overflow valve V1, check valve V2, solenoid directional valve 1 V3, cartridge valve 1 V4, cartridge valve 2 V5, solenoid directional valve 2 V6, solenoid directional valve 3 V7, load balancing valve V8, overflow safety valve V9, hydraulically controlled check valve V10, solenoid directional valve 4 V11, cartridge solenoid valve V20, pressure gauge 1 B1, pressure gauge 2 B20, oil suction filter F1, air filter F2, liquid level gauge F3, cooler F4, pressure sensor F6, accumulator F20, servo power MTR. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0038] like Figure 1 As shown, a hydraulic system for a trimming module of a pulp molding machine provided by one embodiment of the present invention includes:

[0039] The trimming cylinder 1 is connected to the template 2 (especially the upper template, the same below). The downward movement of the trimming cylinder 1 closes the lower template to achieve the trimming and forming of the product.

[0040] Overflow safety valve V9 is used to limit the pressure in the lower chamber of trimming cylinder 1 to prevent damage to the oil circuit due to excessive pressure and ensure system safety.

[0041] Load balancing valve V8 opens and closes by switching the pilot oil through solenoid reversing valve V7. When closed, it balances the load on formwork 2, preventing it from falling due to gravity when idle, thus increasing the safety and stability of the equipment.

[0042] Solenoid reversing valve V7 controls the pilot oil flow to balancing valve V8. It switches state based on the electrical signal from D104, opening or closing V8. When D104 is energized, solenoid reversing valve V7 switches, opening load balancing valve V8.

[0043] The electromagnetic reversing valve V3 controls the up and down movement of template 2. When D102 is energized, template 2 moves downward, and when D101 is energized, template 2 moves upward.

[0044] The electromagnetic reversing valve 2 V6, the cartridge valve 1 V4 (one-way valve function) and the cartridge valve 2 V5 work together to form a differential oil circuit. When D100 is energized (and D102 is energized at the same time), the template 2 moves downward quickly, thereby increasing the mold closing speed and reducing energy consumption.

[0045] The rapid mold lifting control module includes a solenoid reversing valve V11 and a hydraulically controlled one-way valve V10. V11 controls the pilot oil of V10 through the electrical signal of D103, so that the hydraulically controlled one-way valve V10 opens when the mold plate 2 moves upward, thereby realizing the rapid mold lifting function.

[0046] The overflow valve V1, as a system safety valve, limits the maximum working pressure of the system to prevent the system from overloading.

[0047] Energy storage and control module, including:

[0048] Accumulator F20 is used to store energy and provide external control pilot oil;

[0049] The plug-in solenoid valve V20 is used to control the energy release of the accumulator F20. When D200 is energized, the plug-in solenoid valve V20 is activated to release the energy in the accumulator F20.

[0050] The one-way valve V2 is used by the system to charge the accumulator F20.

[0051] Pressure monitoring and display module, including:

[0052] Pressure sensor F6, used to detect and feedback system pressure;

[0053] Pressure gauge B1, used to display system pressure;

[0054] Pressure gauge 2 B20 is used to display the external control oil pressure.

[0055] Oil management and maintenance module, including:

[0056] Cooler F4, connected to external cooling water, is used to cool the hydraulic oil returning to the tank;

[0057] Liquid level gauge F3, used to display the oil level;

[0058] Oil suction filter F1, used to filter oil;

[0059] Air filter F2 is used to filter air when the oil level changes to prevent excessive pressure difference and contamination caused by debris caused by air entering when the oil level changes.

[0060] The servo-powered MTR, as the power source of the system, provides hydraulic energy.

[0061] In this embodiment of the present invention, after system startup, the servo power MTR begins operating. Hydraulic oil enters the system through suction filter F1, is cooled by cooler F4, and is then pumped to the various hydraulic components by the servo power pump. At this point, the solenoid reversing valves are in their initial state, and mold plate 2 remains stationary. When rapid mold closing is required, D100 and D102 are energized simultaneously, switching solenoid reversing valve 2 (V6). Cartridge valves 1 (V4), 2 (V5), and 2 (V6) work together to form a differential oil circuit, allowing mold plate 2 to rapidly descend. Simultaneously, overflow safety valve V9 monitors the lower chamber pressure to prevent overpressure. After mold plate 2 and the lower mold plate are closed, trimming cylinder 1 activates, achieving trimming and forming of the product. After trimming is complete, D101 is energized, switching solenoid reversing valve 1 (V3), and mold plate 2 ascends. If rapid mold raising is required, D103 is energized simultaneously, activating solenoid reversing valve V11 and opening hydraulically controlled check valve V10, accelerating upward movement.

[0062] Throughout operation, overflow valve V1 monitors system pressure to prevent overload. Load balancing valve V8 and solenoid reversing valve V7 ensure that template 2 does not fall when idle. Accumulator F20 and plug-in solenoid valve V20 provide auxiliary power when needed. Monitoring devices such as pressure sensor F6, pressure gauge 1 B1, and pressure gauge 2 B20 provide real-time system status monitoring and feedback, ensuring safe and stable operation. Simultaneously, cooler F4 continuously circulates and cools the hydraulic oil to maintain a stable system temperature. Auxiliary components such as the level gauge F3 and air filter F2 also participate in the system's daily maintenance and upkeep.

[0063] like Figure 1 As shown in FIG. 1 , as a preferred embodiment of the present invention, D100 , D101 , D102 , D103 , D104 , and D200 represent electromagnet action signals of the electromagnetic reversing valve.

[0064] For example, when D100 is energized, the two-position four-way solenoid directional valve V6 switches to the right function.

[0065] The D100 point indicates that the mold is reduced quickly and is energized at the same time as D102;

[0066] Point D101 indicates that template 2 is rising;

[0067] Point D102 represents the descent of template 2;

[0068] Point D103 represents mold lifting pressure relief, and is energized at the same time as D101;

[0069] Point D104 represents mold reduction and pressure relief, and is energized at the same time as D102;

[0070] Point D200 indicates that accumulator F20 is releasing energy.

[0071] The working principle of this utility model is:

[0072] The hydraulic system of the trimming module of this pulp molding machine begins operation after startup. The hydraulic oil enters the system through suction filter F1, is cooled by cooler F4, and is then pumped to the hydraulic components by the servo pump. At this point, the solenoid directional valves are in their initial state, and platen 2 remains stationary. When rapid mold closing is required, D100 and D102 are energized simultaneously, switching solenoid directional valve 2 (V6). Cartridge valves 1 (V4), 2 (V5), and 2 (V6) work together to form a differential oil circuit, allowing platen 2 to descend rapidly. Simultaneously, overflow safety valve V9 monitors the lower chamber pressure to prevent overpressure. After platen 2 and the lower platen are closed, trimming cylinder 1 activates, completing the trimming and forming of the product. After trimming is complete, D101 is energized, switching solenoid directional valve 1 (V3), allowing platen 2 to ascend. If rapid mold raising is required, D103 is energized simultaneously, activating solenoid directional valve V11 and opening hydraulically controlled check valve V10, accelerating upward movement.

[0073] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A hydraulic system for a trimming module of a pulp molding machine, comprising a trimming cylinder, characterized in that: The trimming oil cylinder is connected to the template, and the template is closed with the lower template through the downward movement of the trimming oil cylinder to achieve trimming and forming of the product; and further comprising: Overflow safety valve, used to limit the pressure in the lower chamber of the trimming cylinder; A load balancing valve and a third electromagnetic reversing valve, wherein the load balancing valve is used to open under specific conditions to balance the load; the third electromagnetic reversing valve is used to control the pilot oil of the balancing valve; Solenoid reversing valve 1, used to control the up and down movement of the template; Solenoid reversing valve 2, cartridge valve 1 and cartridge valve 2 work together to form a differential oil circuit to speed up the template's downward movement; The overflow valve, as a system safety valve, is used to limit the maximum working pressure of the system; Servo power, as the power source of the system, is used to provide hydraulic energy; Rapid mold raising control module, used to realize rapid mold raising of templates; Energy storage and control module, used for storing, controlling and charging energy; Pressure monitoring and display module, used for real-time monitoring, feedback and display of system pressure and external control oil pressure; The oil management and maintenance module is used to manage and maintain the oil in the hydraulic system.

2. The hydraulic system of the trimming module of the pulp molding machine according to claim 1, characterized in that: The rapid mold raising control module includes: Solenoid reversing valve 4, used to control the flow direction of oil in the hydraulic system by receiving electrical signals; The hydraulically controlled one-way valve and the electromagnetic reversing valve enable the template to rise quickly by opening the hydraulically controlled one-way valve.

3. The hydraulic system of the trimming module of the pulp molding machine according to claim 1, characterized in that: The energy storage and control module includes: Accumulator, used to store energy and provide externally controlled pilot oil; Cartridge solenoid valve, used to control the discharge of accumulator; One-way valve, used by the system to charge the accumulator.

4. The hydraulic system of the trimming module of the pulp molding machine according to claim 1, characterized in that: The pressure monitoring and display module includes: Pressure sensor, used to detect and feedback system pressure; Pressure gauge 1, used to display system pressure; Pressure gauge 2 is used to display the external control oil pressure.

5. The hydraulic system of the trimming module of the pulp molding machine according to claim 1, characterized in that: The oil management and maintenance module includes: Cooler, connected to external cooling water, used to cool the hydraulic oil returning to the tank; Liquid level gauge, used to display the oil height; Oil suction filter, used to filter oil; Air filter, used to filter air when the oil level changes.

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