Large-range pressure output system and output method

Abstract

The invention belongs to the technical field of pressure output, and particularly relates to a wide-range pressure output system and method. The wide-range pressure output system comprises a plurality of electric proportional valves, the input ends of the electric proportional valves are connected with a gas source, the output ends of the electric proportional valves are correspondingly connected with fluid pressure conversion devices with different gas-liquid pressure conversion ratios, and the output ends of the electric proportional valves are connected with fluid pressure conversion devices with different gas-liquid pressure conversion ratios. The fluid pressure conversion device is connected with a pressure output mechanism, and the output pressure range of the pressure output mechanism is 0-150 KN. According to the invention, the output of larger pressure can be realized, the maximum pressure can reach 150KN, the full range of 0-150KN is controllable, and the corresponding thrust can be stably output only by controlling the gas pressure in the range of 0-0.8 MPa.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure output, and in particular relates to a pressure output system and an output method with a large range. Background Art

[0002] In industrial production, especially in processes such as thermocompression bonding, stamping, and forming, traditional pressure output devices typically operate only within a limited pressure range, making it difficult to meet diverse demands from low to high pressures. For example, some equipment may require pre-pressing at low pressure before completing the final forming or stamping at high pressure. Furthermore, traditional hydraulic systems often require complex hydraulic pump stations and piping systems, which not only increases equipment cost and maintenance difficulties but can also result in bulky systems that take up excessive space.

[0003] Existing devices often operate only within a single pressure range and cannot achieve full-scale pressure output. Furthermore, these devices also have shortcomings in control accuracy and response speed, making it difficult to meet the high-precision and fast-response requirements of modern industrial production.

[0004] Therefore, there is an urgent need for a device that can achieve a wide range of pressure output, which can not only provide precise control in different pressure segments, but also have efficient energy conversion, rapid response and compact structural design. Summary of the Invention

[0005] In view of the above shortcomings of the prior art, an object of the present invention is to provide a pressure output system and output method with a large range.

[0006] In order to achieve the above objectives, the technical solutions adopted are: One of the objects of the present invention is to provide a pressure output system with a large range, including an electric proportional valve, the input end of the electric proportional valve is connected to the gas source, the electric proportional valve is provided in plurality, the output end of each of the electric proportional valves is correspondingly connected to a fluid pressure conversion device with a different gas-liquid pressure conversion ratio, the fluid pressure conversion device is connected to a pressure output mechanism, and the output force range of the pressure output mechanism is 0-150KN.

[0007] The beneficial effect of adopting the above technical solution is that the electric proportional valve is used to control the air pressure going to the fluid pressure conversion device. The fluid pressure conversion device can efficiently convert the low-pressure air source into a high-pressure hydraulic output. Through the combination of multiple fluid pressure conversion devices with different gas-liquid pressure conversion ratios, a wide range of force output from 0 to 150KN is achieved.

[0008] Preferably, the number of the electrical proportional valves is three, and the output ends of the three electrical proportional valves correspond to three fluid pressure conversion devices with different gas-liquid pressure conversion ratios, and the gas-liquid pressure conversion ratios of the three fluid pressure conversion devices are 1:1, 1:3 and 1:12 respectively.

[0009] The beneficial effects of adopting the above-mentioned preferred technical solution are: setting three electrical proportional valves and correspondingly connecting fluid pressure conversion devices with different gas-liquid pressure conversion ratios, so that the system can select the appropriate conversion device according to different pressure requirements, further improving the flexibility and control accuracy of the system. At the same time, by rationally allocating conversion devices in different pressure range segments, the overall performance of the system is optimized, so that it can operate efficiently in different pressure segments; a conversion ratio of 1:1 means that air pressure is directly converted into hydraulic pressure, which is suitable for low pressure ranges (such as 0-14KN), can respond quickly and provide stable output. A gas-liquid pressure conversion ratio of 1:3 is suitable for medium pressure ranges (such as 14-40KN) and can provide moderate output force. A gas-liquid pressure conversion ratio of 1:12 can convert lower air pressure into higher hydraulic pressure, which is suitable for occasions requiring large output force, such as the pressure range of 40-150KN.

[0010] Preferably, the pressure output mechanism comprises a hydraulic cylinder, one end of the hydraulic cylinder is a piston rod, and the piston rod end is the pressure output end.

[0011] Preferably, the other end of the hydraulic cylinder is connected to a lifting cylinder.

[0012] The beneficial effects of adopting the above preferred technical solution are: the hydraulic cylinder, as a pressure output mechanism, can convert hydraulic energy into mechanical energy, achieving stable force output. The piston rod, as the pressure output end, can be directly connected to external equipment, facilitating various mechanical operations such as pressing and pushing, thereby improving the practicality and operational convenience of the system. The hydraulic cylinder piston rod extends under the action of hydraulic oil pressure, but there is no corresponding hydraulic oil circuit to retract the piston rod. Therefore, an air cylinder is added to assist in retracting the hydraulic cylinder piston rod.

[0013] Preferably, the fluid pressure conversion device is an air-oil booster or a gas-liquid converter.

[0014] The beneficial effect of adopting this preferred technical solution is that the fluid pressure conversion device uses either an air-oil booster or a gas-to-liquid converter. These two devices can be selected based on different application scenarios and pressure requirements, providing a diverse solution. The air-oil booster can achieve a high pressure increase and is suitable for applications requiring high-pressure output. The gas-to-liquid converter is suitable for medium and low pressure ranges and features a simple structure and fast response, further enriching the system's functionality and applicability.

[0015] Preferably, the fluid pressure conversion devices with gas-liquid pressure conversion ratios of 1:1, 1:3 and 1:12 respectively are a gas-liquid converter, a first air-oil booster and a second air-oil booster, which are respectively connected to a first electrical proportional valve, a second electrical proportional valve and a third electrical proportional valve, that is, the first electrical proportional valve is connected to the gas-liquid converter, the second electrical proportional valve is connected to the first air-oil booster, and the third electrical proportional valve is connected to the second air-oil booster. The output end of the first air-oil booster is connected to a first pipeline, and the output end of the second air-oil booster is connected to a second pipeline. The first pipeline and the second pipeline are commonly connected to a three-way valve for oil, and the three-way valve for oil is also connected to a third pipeline, and the third pipeline is connected to the pressure output mechanism.

[0016] The beneficial effect of adopting the above preferred technical solution is that the structure of the three-way valve makes it possible to switch different air-oil boosters as needed to achieve outputs in different pressure ranges.

[0017] More preferably, the output end of the gas-liquid converter is connected to an oil manifold, which is respectively connected to the first pipeline and the second pipeline. The gas-liquid converter enters the oil through the oil manifold through the first pipeline or the second pipeline and is connected to the third pipeline through the three-way valve.

[0018] Preferably, the oil manifold is connected to the first pipeline via the output end of the first air-oil supercharger, and the oil manifold is connected to the second pipeline via the output end of the second air-oil supercharger.

[0019] The beneficial effect of adopting the above-mentioned preferred technical solution is that the hydraulic oil output from the output end of the gas-liquid converter only flows through the output end of the air-oil booster through the oil manifold, flows into the oil three-way valve through the first pipeline or the second pipeline, and enters the pressure output mechanism through the third pipeline. The amplifying effect of the air-oil booster is not used. The amplifying effect of the air-oil booster requires the air supply of the electrical proportional valve to be realized. Therefore, in the output from the gas-liquid converter, the air-oil booster only plays the role of providing a pipeline.

[0020] A second object of the present invention is to provide a method for outputting pressure in a large range, using the aforementioned pressure output system in a large range.

[0021] Preferably, the output force range of 0-150KN is divided into three range segments: 0-14KN, 14-40KN, and 40-150KN, and the three range segments are controlled by the first electrical proportional valve, the third electrical proportional valve, and the second electrical proportional valve respectively.

[0022] The beneficial effects of adopting the above-mentioned preferred technical solution are: through segmented control, each electric proportional valve can accurately control the corresponding pressure range, thereby improving the control accuracy of the system; different pressure sections are realized by different electric proportional valve and booster combinations, ensuring that the system can operate efficiently under different pressures; segmented control can avoid excessive load on a single booster at the full range, thereby improving the stability and service life of the system.

[0023] Preferably, the pressure range of the output ends of the first electrical proportional valve, the third electrical proportional valve and the second electrical proportional valve is 0-0.8 MPa.

[0024] Compared with the existing technology, the beneficial effects of the present invention are: the present invention can achieve a larger pressure output, up to a maximum of 150KN, which basically meets the pressure output requirements of all hot pressing bonding aspects; the full range of 0-150KN is controllable, and the corresponding thrust can be stably output by simply controlling the gas pressure in the range of 0-0.8MPa; the segmented control method further improves the control accuracy and operating efficiency of the system, making it suitable for a variety of industrial application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a pressure output system with a large range of the present invention; Figure 2 This is a front view of a pressure output system with a large range of the present invention; Figure 3 This is a structural gas and liquid circuit diagram of a large-range pressure output system of the present invention; The accompanying drawings are marked as follows: 1. lifting cylinder; 2. hydraulic cylinder; 3. three-way valve for oil; 4. oil manifold; 5. second air-oil booster; 6. first electrical proportional valve; 7. second electrical proportional valve; 8. third electrical proportional valve; 9. first air-oil booster; 10. gas-liquid converter; 11. pressure output end; 12. first pipeline; 13. second pipeline; 14. third pipeline. DETAILED DESCRIPTION

[0026] The present invention is described below with reference to examples, which are only used to explain the present invention and are not used to limit the scope of the present invention.

[0027] refer to Figure 1-Figure 3 A large-range pressure output system includes an electric proportional valve, the input end of the electric proportional valve is connected to the gas source, the electric proportional valve is provided in plurality, the output end of each of the electric proportional valves is correspondingly connected to a fluid pressure conversion device with a different gas-liquid pressure conversion ratio, the fluid pressure conversion device is connected to a pressure output mechanism, and the output force range of the pressure output mechanism is 0-150KN.

[0028] In this embodiment, three electrical proportional valves are provided, corresponding to three fluid pressure conversion devices with different gas-liquid pressure conversion ratios. The gas-liquid pressure conversion ratios of the three fluid pressure conversion devices are 1:1, 1:3 and 1:12 respectively.

[0029] As a preferred embodiment, the pressure output mechanism includes a hydraulic cylinder 2 , one end of the hydraulic cylinder 2 is a piston rod, and the piston rod end is the pressure output end 11 .

[0030] As a preferred embodiment, the other end of the hydraulic cylinder 2 is connected to the lifting cylinder 1.

[0031] As a preferred embodiment, the fluid pressure conversion device is an air-oil booster or a gas-liquid converter 10.

[0032] As a preferred embodiment, the fluid pressure conversion devices with gas-liquid pressure conversion ratios of 1:1, 1:3 and 1:12 respectively are a gas-liquid converter 10, a first air-oil booster 9 and a second air-oil booster 5, which are respectively connected to a first electrical proportional valve 6, a second electrical proportional valve 7 and a third electrical proportional valve 8, that is, the first electrical proportional valve 6 is connected to the gas-liquid converter 10, the second electrical proportional valve 7 is connected to the first air-oil booster 9, and the third electrical proportional valve 8 is connected to the second air-oil booster 5. The output end of the first air-oil booster 9 is connected to a first pipeline 12, and the output end of the second air-oil booster 5 is connected to a second pipeline 13. The first pipeline 12 and the second pipeline 13 are jointly connected to an oil three-way valve 3, and the oil three-way valve 3 is also connected to a third pipeline 14, and the third pipeline 14 is connected to the pressure output mechanism.

[0033] As a preferred embodiment, the output end of the gas-liquid converter 10 is connected to the oil manifold 4, and the oil manifold 4 is respectively connected to the first pipeline 12 and the second pipeline 13. The gas-liquid converter 10 enters the oil three-way valve 3 through the oil manifold 4 through the first pipeline 12 or the second pipeline 13 and is connected to the third pipeline 14.

[0034] As a preferred embodiment, the oil manifold 4 is connected to the first pipeline 12 via the output end of the first air-oil booster 9 , and the oil manifold 4 is connected to the second pipeline 13 via the output end of the second air-oil booster 5 .

[0035] The present invention also provides a method for outputting a large-range pressure, which adopts the large-range pressure output system.

[0036] As a preferred embodiment, the output force range of 0-150KN is divided into three range segments: 0-14KN, 14-40KN, and 40-150KN, which are controlled by the first electrical proportional valve 6, the third electrical proportional valve 8, and the second electrical proportional valve 7 respectively.

[0037] In this embodiment, the total pressure range of the output ends of the first electrical proportional valve 6 , the third electrical proportional valve 8 , and the second electrical proportional valve 7 is 0-0.8 MPa.

[0038] During operation, when the pressure output mechanism needs to output a pressure of 10KN, the first electrical proportional valve 6 controls the output of a gas pressure of 0.5MPa to the gas-liquid converter 10. The gas-liquid converter 10 converts the gas pressure into hydraulic oil of corresponding pressure at a ratio of 1:1 for output, and flows through the oil manifold 4 and the second air-oil booster 5 (or the first air-oil booster 9). The oil three-way valve 3 controls the second pipeline 13 corresponding to the second air-oil booster 5 (or the first pipeline 12 corresponding to the first air-oil booster 9) to open the oil circuit, and the hydraulic oil is pressed into the hydraulic cylinder 2 through the third pipeline 14. The inner diameter of the hydraulic cylinder 2 is 160mm. According to F=P*S, where P is pressure, S is the piston area of the hydraulic cylinder 2, and F is thrust, the piston rod end of the pressure output mechanism hydraulic cylinder 2 can output a thrust of about 10KN. The specific calculation process is as follows: When the pressure output mechanism is required to output a pressure of 100KN, the second electrical proportional valve 7 controls the output of a gas pressure of about 0.42MPa to the first air-oil booster 9. The first air-oil booster 9 converts the 0.42MPa pressure of the gas into 5.04MPa pressure hydraulic oil for output at a ratio of 1:12. The oil three-way valve 3 controls the opening of the first pipeline 12 corresponding to the first air-oil booster 9. The hydraulic oil is pressed into the hydraulic cylinder 2 through the third pipeline 14. According to F=P*S, P is 5.04MPa and S is 0.0201m 2 , the piston rod end of the hydraulic cylinder 22 of the pressure output mechanism can output a thrust of about 100KN; Similarly, when the pressure output mechanism is required to output a pressure of 30KN, the third electrical proportional valve 8 controls the output of a gas pressure of about 0.5MPa to the second air-oil booster 5. The second air-oil booster 5 converts the 0.5MPa pressure of the gas into 1.5MPa pressure hydraulic oil for output according to the ratio of 1:3. The oil three-way valve 3 controls the opening of the second pipeline 13 corresponding to the second air-oil booster 5. The hydraulic oil is pressed into the hydraulic cylinder 2 through the third pipeline 14. According to F=P*S, P is 1.5MPa and S is 0.0201m 2 The piston rod end of the hydraulic cylinder 22 of the pressure output mechanism can output a thrust of about 30KN.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure output system with a large range, characterized in that: It includes an electric proportional valve, the input end of which is connected to the air source. The electric proportional valve is provided in multiple numbers, and the output end of each electric proportional valve is correspondingly connected to a fluid pressure conversion device with a different gas-liquid pressure conversion ratio. The fluid pressure conversion device is connected to a pressure output mechanism, and the output force range of the pressure output mechanism is 0-150KN.

2. The large-range pressure output system according to claim 1, characterized in that: There are three electrical proportional valves, and the output ends of the three electrical proportional valves correspond to three fluid pressure conversion devices with different gas-liquid pressure conversion ratios. The gas-liquid pressure conversion ratios of the three fluid pressure conversion devices are 1:1, 1:3 and 1:12 respectively.

3. The large-range pressure output system according to claim 1, characterized in that: The pressure output mechanism comprises a hydraulic cylinder (2), one end of the hydraulic cylinder (2) is a piston rod, and the piston rod end is the pressure output end (11).

4. The large-range pressure output system according to claim 3, characterized in that: The other end of the hydraulic cylinder (2) is connected to the lifting cylinder (1).

5. The large-range pressure output system according to claim 2, characterized in that: The fluid pressure conversion device is an air-oil booster or a gas-liquid converter (10).

6. The large-range pressure output system according to claim 5, characterized in that: The fluid pressure conversion devices with gas-liquid pressure conversion ratios of 1:1, 1:3 and 1:12 respectively comprise a gas-liquid converter (10), a first air-oil booster (9) and a second air-oil booster (5), which are respectively connected to a first electrical proportional valve (6), a second electrical proportional valve (7) and a third electrical proportional valve (8); the output end of the first air-oil booster (9) is connected to a first pipeline (12); the output end of the second air-oil booster (5) is connected to a second pipeline (13); the first pipeline (12) and the second pipeline (13) are commonly connected to an oil three-way valve (3); the oil three-way valve (3) is further connected to a third pipeline (14); and the third pipeline (14) is connected to the pressure output mechanism.

7. The large-range pressure output system according to claim 6, characterized in that: The output end of the gas-liquid converter (10) is connected to an oil manifold (4), and the oil manifold (4) is respectively connected to the first pipeline (12) and the second pipeline (13). The gas-liquid converter (10) enters the oil three-way valve (3) via the oil manifold (4) through the first pipeline (12) or the second pipeline (13), and is connected to the third pipeline (14).

8. A method for outputting pressure over a wide range, characterized in that: A pressure output system with a large range as described in any one of claims 1 to 7 is used.

9. The method for outputting pressure over a wide range according to claim 8, characterized in that: The output force range of 0-150 kN is divided into three range segments: 0-14 kN, 14-40 kN, and 40-150 kN. The three range segments are controlled by the first electrical proportional valve (6), the third electrical proportional valve (8), and the second electrical proportional valve (7) respectively.

10. The method for outputting pressure over a wide range according to claim 9, characterized in that: The pressure range of the output ends of the first electrical proportional valve (6), the third electrical proportional valve (8), and the second electrical proportional valve (7) is 0-0.8 MPa.

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