Hydraulic speed control system and hydraulic press

Abstract

The present invention provides a hydraulic speed control system, which relates to the technical field of hydraulic control systems, including a first oil pipe, a second oil pipe, a first flow regulating valve, a second flow regulating valve and an oil cylinder, wherein the first flow regulating valve is connected to the first oil pipe and the first flow regulating valve is connected to an oil chamber of the oil cylinder, the second flow regulating valve is connected to the second oil pipe and the second flow regulating valve is connected to another oil chamber of the oil cylinder, the first flow regulating valve can regulate the flow of oil flowing from the oil cylinder to the first oil pipe, and the second flow regulating valve can regulate the flow of oil flowing from the second oil pipe to the oil cylinder. The present invention also provides a hydraulic press, including the above-mentioned hydraulic speed control system. The structure is simple, so that the hydraulic system can overcome different load forces for output, has high versatility, is conducive to improving control accuracy and production efficiency, and is conducive to reducing production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control systems, in particular to a hydraulic speed control system and a hydraulic press. Background Art

[0002] With the rapid development of China's current economy, various industrial demands are also increasing day by day, and higher requirements are put forward for industrial equipment. While improving its versatility, efficiency and safety, industrial equipment also needs to be energy-saving and environmentally friendly and reduce production costs. At present, the hydraulic system of most industrial cutting equipment lacks the function of shearing speed adjustment, has low versatility, cannot provide corresponding shearing speeds for materials of different specifications and materials, and cannot guarantee shearing accuracy, which affects production efficiency and increases production costs; the speed during shearing and return is not adjustable, which is prone to vibration and noise, and the equipment failure rate is high, which shortens the service life of the equipment and poses safety hazards. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic speed control system and a hydraulic press to solve the problems existing in the above-mentioned prior art. The structure is simple, so that the hydraulic system can overcome different load forces for output, the versatility is high, it is beneficial to improve control accuracy and production efficiency, and it is beneficial to reduce production costs.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a hydraulic speed control system, comprising a first oil pipe, a second oil pipe, a first flow regulating valve, a second flow regulating valve and an oil cylinder, wherein the first flow regulating valve is connected to the first oil pipe and the first flow regulating valve is connected to an oil chamber of the oil cylinder, the second flow regulating valve is connected to the second oil pipe and the second flow regulating valve is connected to another oil chamber of the oil cylinder, the first flow regulating valve can regulate the flow of oil flowing from the oil cylinder to the first oil pipe, and the second flow regulating valve can regulate the flow of oil flowing from the second oil pipe to the oil cylinder.

[0006] Preferably, the hydraulic speed control system provided by the present invention also includes an oil tank, and the second flow regulating valve includes a first cartridge valve, a second cartridge valve and a control valve, the two working oil ports of the first cartridge valve are respectively connected to the second oil pipe and an oil chamber of the oil cylinder, the two working oil ports of the second cartridge valve are respectively connected to the oil tank and another oil chamber of the oil cylinder, the control valve is connected to the control oil port of the first cartridge valve, the control oil port of the second cartridge valve, the second oil pipe and the oil tank, the control valve can control the oil to enter or flow out of the oil cylinder by controlling the opening and closing of the first cartridge valve and the second cartridge valve, and the first cartridge valve can adjust the flow rate of oil flowing from the second oil pipe to the oil cylinder.

[0007] Preferably, the first flow regulating valve does not regulate the flow of oil flowing from the first oil pipe to the oil cylinder, and the second flow regulating valve does not regulate the flow of oil flowing from the oil cylinder to the oil tank.

[0008] Preferably, the first cartridge valve has a first adjusting handle, and the first adjusting handle can adjust the opening degree of the first cartridge valve.

[0009] Preferably, the first flow regulating valve has a second regulating handle, and the second regulating handle can adjust the opening degree of the first flow regulating valve.

[0010] Preferably, the control valve is a solenoid valve, the oil inlet of the solenoid valve is connected to the second oil pipe, the oil return port of the solenoid valve is connected to the oil tank, and the two working oil ports of the solenoid valve are respectively connected to the control oil port of the first cartridge valve and the control oil port of the second cartridge valve.

[0011] Preferably, the pipeline between the working oil port of the solenoid valve and the first cartridge valve and the pipeline between the working oil port of the solenoid valve and the second cartridge valve are both provided with a damping device, and the damping device can make the pressure of the oil outlet of the damping device lower than the pressure of the oil inlet of the damping device.

[0012] Preferably, the hydraulic speed control system provided by the present invention further comprises a one-way valve, the oil inlet of the one-way valve is connected to the second oil pipe, and the oil outlet of the one-way valve is connected to both the first cartridge valve and the control valve.

[0013] Preferably, the first flow regulating valve is a one-way throttle valve, and the damping device is a damper, a damping hole or a superimposed throttle valve.

[0014] The present invention also provides a hydraulic press, comprising the above-mentioned hydraulic speed control system.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The hydraulic speed control system and hydraulic press provided by the present invention are provided with a first flow regulating valve and a second flow regulating valve, wherein the first flow regulating valve can regulate the flow of oil flowing from the oil cylinder to the first oil pipe, and the second flow regulating valve can regulate the flow of oil flowing from the second oil pipe to the oil cylinder. By regulating the first flow regulating valve and the second flow regulating valve, the pushing speed of the piston rod of the oil cylinder can be adjusted, so that the hydraulic system can overcome different load forces for output, and provide corresponding output speeds for materials of different specifications and different materials, with high versatility, which is conducive to improving shearing accuracy and production efficiency, and is conducive to reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Schematic diagram of the hydraulic speed control system in Embodiment 1;

[0019] Figure 2 This is a schematic diagram of the structure of the hydraulic speed control system in the first position in this embodiment 2;

[0020] Figure 3 This is a schematic diagram of the structure of the hydraulic speed control system in the second embodiment;

[0021] Figure 4 is a schematic structural diagram of the first cartridge valve in this embodiment 1;

[0022] In the figure: 100-hydraulic speed control system, 200-hydraulic press, 1-first oil pipe, 2-second oil pipe, 3-first flow regulating valve, 301-second regulating handle, 4-second flow regulating valve, 401-first cartridge valve, 402-second cartridge valve, 403-control valve, 404-first regulating handle, 405-solenoid valve, 5-oil cylinder, 6-oil tank, 7-damping device, 8-check valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a hydraulic speed control system and a hydraulic press to solve the problems existing in the above-mentioned prior art. The structure is simple, so that the hydraulic system can overcome different load forces for output, the versatility is high, it is beneficial to improve control accuracy and production efficiency, and it is beneficial to reduce production costs.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

[0026] like Figure 1As shown, this embodiment provides a hydraulic speed control system 100, including a first oil pipe 1, a second oil pipe 2, a first flow regulating valve 3, a second flow regulating valve 4 and an oil cylinder 5. Two oil chambers are provided on both sides of the piston of the oil cylinder 5. The first flow regulating valve 3 is connected to the first oil pipe 1 and the first flow regulating valve 3 is connected to one oil chamber of the oil cylinder 5. The second flow regulating valve 4 is connected to the second oil pipe 2 and the second flow regulating valve 4 is connected to the other oil chamber of the oil cylinder 5. The first flow regulating valve 3 can adjust the flow of oil flowing from the oil cylinder 5 to the first oil pipe 1, and the second flow regulating valve 4 can adjust the flow of oil flowing from the second oil pipe 2 to the oil cylinder 5. By adjusting the first flow regulating valve 3 and the second flow regulating valve 4, the pushing speed of the piston rod of the oil cylinder 5 can be adjusted, so that the hydraulic system can overcome different load forces for output, and provide corresponding output speeds for materials of different specifications and different materials. It has high versatility, is conducive to improving shearing accuracy and production efficiency, and is conducive to reducing production costs.

[0027] The hydraulic speed control system 100 provided in this embodiment also includes an oil tank 6, and the second flow regulating valve 4 includes a first cartridge valve 401, a second cartridge valve 402 and a control valve 403. The two working oil ports of the first cartridge valve 401 are respectively connected to the second oil pipe 2 and an oil chamber of the oil cylinder 5, and the two working oil ports of the second cartridge valve 402 are respectively connected to the oil tank 6 and another oil chamber of the oil cylinder 5. The control valve 403 is connected to the control oil port of the first cartridge valve 401, the control oil port of the second cartridge valve 402, the second oil pipe 2 and the oil tank 6. The control valve 403 can control the oil to enter or flow out of the oil cylinder 5 by controlling the opening and closing of the first cartridge valve 401 and the second cartridge valve 402. The first cartridge valve 401 can adjust the flow rate of the oil flowing from the second oil pipe 2 to the oil cylinder 5.

[0028] The first flow regulating valve 3 does not regulate the flow of the oil flowing from the first oil pipe 1 to the oil cylinder 5, and the second flow regulating valve 4 does not regulate the flow of the oil flowing from the oil cylinder 5 to the oil tank 6. Preferably, the first flow regulating valve 3 regulates the outflow speed of the oil in the rod chamber of the oil cylinder 5, and the second flow regulating valve 4 regulates the inflow speed of the oil in the rodless chamber of the oil cylinder 5, so as to adjust the output speed of the hydraulic system and ensure the rapid return of the oil cylinder 5.

[0029] The first cartridge valve 401 has a first adjustment handle 404, which can adjust the opening degree of the first cartridge valve 401. Preferably, the first cartridge valve 401 has a cover plate with a stroke limiting mechanism, and the cover plate with the stroke limiting mechanism is provided with the first adjustment handle 404. The structure is simple and easy to adjust.

[0030] The first flow regulating valve 3 has a second regulating handle 301, and the second regulating handle 301 can adjust the opening degree of the first flow regulating valve 3. Preferably, the first flow regulating valve 3 is a one-way throttle valve, and the one-way throttle valve is provided with the second regulating handle 301.

[0031] The control valve 403 is a solenoid valve 405, which is preferably a two-position four-way solenoid valve. The oil inlet of the solenoid valve 405 is connected to the second oil pipe 2, the oil return port of the solenoid valve 405 is connected to the oil tank 6, and the two working oil ports of the solenoid valve 405 are respectively connected to the control oil port of the first cartridge valve 401 and the control oil port of the second cartridge valve 402.

[0032] The pipeline between the working oil port of the solenoid valve 405 and the first cartridge valve 401 and the pipeline between the working oil port of the solenoid valve 405 and the second cartridge valve 402 are both provided with a damping device 7, and the damping device 7 can make the pressure of the oil outlet of the damping device 7 lower than the pressure of the oil inlet of the damping device 7. Preferably, the damping device 7 is a damper, a damping hole or a superimposed throttle valve. The damping device 7 can offset the vibration and noise generated when the device is opened and closed to a certain extent, thereby protecting the device and extending the service life of the device.

[0033] The hydraulic speed control system 100 provided in this embodiment further includes a one-way valve 8, the oil inlet of the one-way valve 8 is connected to the second oil pipe 2, and the oil outlet of the one-way valve 8 is connected to both the first cartridge valve 401 and the control valve 403. The one-way valve 8 is preferably a cartridge one-way valve. Example 2

[0034] like Figure 2 As shown, this embodiment provides a hydraulic press 200, including the hydraulic speed control system 100 in embodiment 1. By adjusting the first flow regulating valve 3 and the second flow regulating valve 4, the pushing speed of the piston rod of the oil cylinder 5 can be adjusted, so that the hydraulic system can overcome different load forces for output, and provide corresponding output speeds for materials of different specifications and different materials, with high versatility, which is conducive to improving shearing accuracy and production efficiency, and is conducive to reducing production costs.

[0035] The hydraulic speed control system 100 and the hydraulic press 200 provided by the present invention are not limited to application in cutting equipment, but can also be applied to other equipment such as compression packaging machines for power output.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A hydraulic speed control system, characterized in that: The invention comprises a first oil pipe, a second oil pipe, a first flow regulating valve, a second flow regulating valve and an oil cylinder, wherein the first flow regulating valve is in communication with the first oil pipe and the first flow regulating valve is in communication with an oil chamber of the oil cylinder, the second flow regulating valve is in communication with the second oil pipe and the second flow regulating valve is in communication with another oil chamber of the oil cylinder, the first flow regulating valve is capable of regulating the flow of oil flowing from the oil cylinder to the first oil pipe, and the second flow regulating valve is capable of regulating the flow of oil flowing from the second oil pipe to the oil cylinder; It also includes an oil tank, the second flow regulating valve includes a first cartridge valve, a second cartridge valve and a control valve, the two working oil ports of the first cartridge valve are respectively communicated with the second oil pipe and an oil chamber of the oil cylinder, the two working oil ports of the second cartridge valve are respectively communicated with the oil tank and the same oil chamber of the oil cylinder, the control valve is communicated with the control oil port of the first cartridge valve, the control oil port of the second cartridge valve, the second oil pipe and the oil tank, the control valve can control the oil to enter or flow out of the oil cylinder by controlling the opening and closing of the first cartridge valve and the second cartridge valve, and the first cartridge valve can adjust the flow of the oil flowing from the second oil pipe to the oil cylinder; The control valve is a solenoid valve, the oil inlet of the solenoid valve is connected to the second oil pipe, the oil return port of the solenoid valve is connected to the oil tank, and the two working oil ports of the solenoid valve are respectively connected to the control oil port of the first cartridge valve and the control oil port of the second cartridge valve.

2. The hydraulic speed control system according to claim 1, characterized in that: The first flow regulating valve does not regulate the flow of oil flowing from the first oil pipe to the oil cylinder, and the second flow regulating valve does not regulate the flow of oil flowing from the oil cylinder to the oil tank.

3. The hydraulic speed control system according to claim 2, characterized in that: The first cartridge valve has a first adjusting handle, and the first adjusting handle can adjust the opening degree of the first cartridge valve.

4. The hydraulic speed control system according to claim 1, characterized in that: The first flow regulating valve has a second regulating handle, and the second regulating handle can adjust the opening degree of the first flow regulating valve.

5. The hydraulic speed control system according to claim 4, characterized in that: The pipeline between the working oil port of the solenoid valve and the first cartridge valve and the pipeline between the working oil port of the solenoid valve and the second cartridge valve are both provided with a damping device, and the damping device can make the pressure of the oil outlet of the damping device lower than the pressure of the oil inlet of the damping device.

6. The hydraulic speed control system according to claim 2, characterized in that: It also includes a one-way valve, the oil inlet of the one-way valve is connected to the second oil pipe, and the oil outlet of the one-way valve is connected to both the first cartridge valve and the control valve.

7. The hydraulic speed control system according to claim 5, characterized in that: The first flow regulating valve is a one-way throttle valve, and the damping device is a damper, a damping hole or a superimposed throttle valve.

8. A hydraulic press, characterized in that: It includes the hydraulic speed control system described in any one of claims 1 to 7.

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