Safety valve of hydraulic system of bending machine

Abstract

The utility model relates to the technical field of hydraulic systems, in particular to a safety valve of a hydraulic system of a bending machine, which comprises an oil inlet seat, an adjusting cylinder is fixedly connected to the right side of the top of the oil inlet seat, a valve core is slidably connected to the lower portion of the inner wall of the adjusting cylinder, and an oil discharge seat is fixedly connected to the right side of the outer wall of the adjusting cylinder. A buffer cylinder is fixedly connected to the left side of the top of the oil inlet seat, a console is fixedly connected to the front side of the oil inlet seat, an adjusting mechanism is arranged in the adjusting cylinder, and a buffer mechanism is arranged in the buffer cylinder. Adjustment of a pressure threshold value and buffering of hydraulic oil are achieved, and adjustability and stability of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, specifically a safety valve for a hydraulic system of a bending machine. Background Technology

[0002] Hydraulic systems in bending machines typically operate under high pressure, reaching tens of megapascals or even higher. Under such high pressure, a system malfunction, such as pump failure, pipe blockage, or control valve failure, can cause a sudden and rapid pressure surge, far exceeding the system's normal operating pressure. This can severely damage hydraulic components, such as deforming cylinders or rupturing oil pipes, and may also lead to safety accidents, threatening the lives of operators. The function of a safety valve is to quickly open and release pressure when the system pressure exceeds a set value, preventing various dangers caused by excessive pressure.

[0003] Existing devices primarily control hydraulic oil leakage and pressure relief through a spring-assisted valve core. Many existing technologies are similar to safety valves with buffer functions used in hydraulic systems. The structure of CN220415869U includes a valve body with an inlet and outlet channel. One end of the inlet channel is closed, and a base, valve core, and reset component are located within it. The base has an axially interconnected valve channel and a buffer chamber. The valve channel connects the inlet and outlet channels. The valve core is at least partially movable within the buffer chamber, closing the valve channel, and can open the valve channel under hydraulic pressure. This invention effectively buffers the hydraulic medium during compression, preventing valve body vibration, hydraulic shock, and pressure fluctuations caused by excessively rapid valve core return. However, there are still areas for improvement in this device.

[0004] Existing devices mainly place the spring and valve core limiter inside the valve body, making it difficult to adjust the pressure setpoint according to the actual operation of the hydraulic system, thus hindering precise control of the hydraulic system pressure. At the same time, some devices generate certain hydraulic shocks during operation, which can drive the opening and closing of the safety valve, making it difficult to stably control the leakage of the safety valve during normal operation, reducing the working efficiency and practicality of the device. Therefore, in order to solve the above problems, a safety valve for the hydraulic system of a bending machine is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a safety valve for a hydraulic system of a bending machine, in order to solve the problem mentioned in the background art that the existing devices mainly place the spring and valve core limiter inside the valve body, making it difficult for some devices to adjust the pressure setting value according to the actual operation of the hydraulic system, so as to facilitate precise control of the pressure in the hydraulic system. At the same time, some devices will generate a certain hydraulic shock during operation, which will drive the opening and closing of the safety valve, thus making it difficult to stably control the leakage of the safety valve during normal operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety valve for a hydraulic system of a bending machine, including an oil inlet seat, an adjusting cylinder fixedly connected to the top right side of the oil inlet seat, a valve core slidably connected to the lower inner wall of the adjusting cylinder, an oil discharge seat fixedly connected to the right side of the outer wall of the adjusting cylinder, a buffer cylinder fixedly connected to the top left side of the oil inlet seat, and a control console fixedly connected to the front side of the oil inlet seat.

[0007] The adjusting cylinder has an adjusting mechanism inside, which includes a servo motor. The bottom of the servo motor is fixedly connected to the top center of the adjusting cylinder. The buffer cylinder has a buffering mechanism inside, which includes a piston. The outer wall of the piston is slidably connected to the middle of the inner wall of the buffer cylinder.

[0008] Preferably, an adjusting screw is fixedly connected to the bottom center of the servo motor, and the bottom end of the adjusting screw passes through the top of the adjusting cylinder and is fitted with a pushing screw.

[0009] Preferably, a slider is fixedly connected to the bottom end of the pusher cylinder, and the outer wall of the slider is slidably connected to the upper part of the inner wall of the adjusting cylinder.

[0010] Preferably, a telescopic damper is fixedly connected to the bottom center of the slider, and the bottom of the telescopic damper is fixedly connected to the top center of the valve core.

[0011] Preferably, the bottom of the slider is fixedly connected to a spring on the outer ring of the telescopic damper, and the bottom of the spring is fixedly connected to the top of the valve core.

[0012] Preferably, a telescopic rod is fixedly connected to the top of the piston, and the top of the telescopic rod is fixedly connected to the top of the inner wall of the buffer cylinder. The interior of the buffer cylinder, located above the piston, is filled with buffer gas.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the adjustment mechanism including a servo motor, adjusting screw, push screw barrel, slider, telescopic damper, and spring, etc., enables the servo motor to be started by the control console, driving the adjusting screw to rotate at a limit position. The adjusting screw drives the push screw barrel and slider to slide up and down. The slider extends and retracts the telescopic damper and spring, thereby controlling the thrust applied by the spring to the valve core, realizing the adjustment of the pressure threshold. This allows some devices to adjust the pressure set value according to the actual operating conditions of the hydraulic system, facilitating precise control of the pressure in the hydraulic system and improving the adjustability and practicality of the device.

[0015] 2. This utility model utilizes a piston and telescopic rod in its buffer mechanism to generate hydraulic shocks through the sudden closing or opening of valves and the rapid start and stop of cylinders in the hydraulic system. These hydraulic shocks cause the piston to slide up and down and extend and retract the telescopic rod. The piston buffers the oil pressure by compressing or expanding the buffer gas, thus achieving hydraulic oil buffering. This allows some parts of the device to absorb a certain amount of hydraulic shock, facilitating stable control of the leakage of the safety valve during normal operation and improving the stability and practicality of the device. Attached Figure Description

[0016] Figure 1 This is a front side perspective view of the structure of this utility model;

[0017] Figure 2 This is a frontal sectional perspective view of the structure of this utility model;

[0018] Figure 3 This is a front sectional perspective view of a portion of the structure of the adjusting cylinder and adjusting mechanism of this utility model;

[0019] Figure 4 This is a frontal sectional perspective view of a portion of the buffer cylinder and buffer mechanism of this utility model.

[0020] In the diagram: 11. Oil inlet seat; 12. Adjusting cylinder; 13. Valve core; 14. Oil outlet seat; 15. Buffer cylinder; 16. Control console; 2. Adjusting mechanism; 21. Servo motor; 22. Adjusting screw; 23. Pushing screw; 24. Slider; 25. Telescopic damper; 26. Spring; 3. Buffering mechanism; 31. Piston; 32. Telescopic rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4One embodiment provided by this utility model:

[0023] A safety valve for a hydraulic system of a bending machine includes an oil inlet seat 11, an adjusting cylinder 12 fixedly connected to the top right side of the oil inlet seat 11, a valve core 13 slidably connected to the lower inner wall of the adjusting cylinder 12, an oil discharge seat 14 fixedly connected to the outer right side of the adjusting cylinder 12, a buffer cylinder 15 fixedly connected to the top left side of the oil inlet seat 11, and a control console 16 fixedly connected to the front side of the oil inlet seat 11.

[0024] An adjustment mechanism 2 is provided inside the adjustment cylinder 12. The adjustment mechanism 2 includes a servo motor 21. The bottom of the servo motor 21 is fixedly connected to the middle of the top of the adjustment cylinder 12. An adjustment screw 22 is fixedly connected to the middle of the bottom of the servo motor 21. The bottom end of the adjustment screw 22 passes through the top of the adjustment cylinder 12 and is fitted with a push screw 23. Through this design, the servo motor 21 drives the adjustment screw 22 to rotate at a limited position, so that the adjustment screw 22 drives the push screw 23 to slide up and down. A slider 24 is fixedly connected to the bottom end of the push screw 23. The outer wall of the slider 24 slides... The upper inner wall of the regulating cylinder 12 is dynamically connected. Through this design, the push screw 23 drives the slider 24 to slide in a limited position. The bottom middle of the slider 24 is fixedly connected to the telescopic damper 25. The bottom of the telescopic damper 25 is fixedly connected to the top middle of the valve core 13. Through this design, the valve core 13 is limited to slide relative to the slider 24. The bottom of the slider 24 is located on the outer ring of the telescopic damper 25 and is fixedly connected to the spring 26. The bottom of the spring 26 is fixedly connected to the top of the valve core 13. Through this design, the spring 26 applies a thrust to the valve core 13.

[0025] The buffer cylinder 15 is equipped with a buffer mechanism 3 inside. The buffer mechanism 3 includes a piston 31. The outer wall of the piston 31 is slidably connected to the middle of the inner wall of the buffer cylinder 15. A telescopic rod 32 is fixedly connected to the top of the piston 31. The top of the telescopic rod 32 is fixedly connected to the top of the inner wall of the buffer cylinder 15. The interior of the buffer cylinder 15, above the piston 31, is filled with buffer gas. Through this design, the hydraulic oil can be buffered by the piston 31 compressing or expanding the buffer gas to buffer the oil pipe pressure.

[0026] Working principle: When the pressure threshold needs to be adjusted, the servo motor 21 is first started through the control console 16. The servo motor 21 drives the adjusting screw 22 to rotate to the limit. The adjusting screw 22 drives the push screw 23 to slide up and down. The push screw 23 drives the slider 24 to slide to the limit. The slider 24 extends and retracts the extension damper 25 and the spring 26, thereby controlling the thrust applied by the spring 26 to the valve core 13, realizing the adjustment operation of the pressure threshold.

[0027] When it is necessary to buffer the hydraulic oil, the hydraulic system first generates a hydraulic shock by suddenly closing or opening the valve and rapidly starting or stopping the cylinder. The hydraulic shock drives the piston 31 to slide up and down and extend the telescopic rod 32. The piston 31 buffers the oil pipe pressure by compressing or expanding the buffer gas, thus realizing the buffering operation of the hydraulic oil. The operation ends here.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A safety valve for a hydraulic system of a bending machine, comprising an oil inlet seat (11), characterized in that: An adjusting cylinder (12) is fixedly connected to the top right side of the oil inlet seat (11), a valve core (13) is slidably connected to the lower inner wall of the adjusting cylinder (12), an oil drain seat (14) is fixedly connected to the right side of the outer wall of the adjusting cylinder (12), a buffer cylinder (15) is fixedly connected to the top left side of the oil inlet seat (11), and a control console (16) is fixedly connected to the front side of the oil inlet seat (11). The regulating cylinder (12) is provided with an regulating mechanism (2) inside. The regulating mechanism (2) includes a servo motor (21). The bottom of the servo motor (21) is fixedly connected to the middle of the top of the regulating cylinder (12). The buffer cylinder (15) is provided with a buffer mechanism (3) inside. The buffer mechanism (3) includes a piston (31). The outer wall of the piston (31) is slidably connected to the middle of the inner wall of the buffer cylinder (15).

2. The safety valve of the hydraulic system of a bending machine according to claim 1, characterized in that: An adjusting screw (22) is fixedly connected to the bottom center of the servo motor (21). The bottom end of the adjusting screw (22) passes through the top of the adjusting cylinder (12) and is fitted with a pusher cylinder (23).

3. The safety valve of the hydraulic system of a bending machine according to claim 2, characterized in that: The bottom end of the pusher cylinder (23) is fixedly connected to a slider (24), and the outer wall of the slider (24) is slidably connected to the upper part of the inner wall of the adjusting cylinder (12).

4. The safety valve of the hydraulic system of a bending machine according to claim 3, characterized in that: A telescopic damper (25) is fixedly connected to the bottom center of the slider (24), and the bottom of the telescopic damper (25) is fixedly connected to the top center of the valve core (13).

5. A safety valve for a hydraulic system of a bending machine according to claim 4, characterized in that: The bottom of the slider (24) is fixedly connected to the outer ring of the telescopic damper (25) with a spring (26), and the bottom of the spring (26) is fixedly connected to the top of the valve core (13).

6. A safety valve for a hydraulic system of a bending machine according to claim 1, characterized in that: The piston (31) is fixedly connected to a telescopic rod (32), the top of which is fixedly connected to the top of the inner wall of the buffer cylinder (15). The interior of the buffer cylinder (15) above the piston (31) is filled with buffer gas.

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