A vertical internal high-pressure forming water pressure system

Abstract

This invention belongs to the field of internal high-pressure molding technology, specifically disclosing a vertical internal high-pressure molding hydraulic system, including a control unit, a water supply unit, a water purification unit, a molding unit, and a control unit; the water supply unit includes a water supply tank and a water supply level control component; the water purification unit includes a water purification tank, a water purification component, and a water purification level control component; the control unit includes a main controller, a first injection control component, and a second injection control component; the first injection control component includes a low-pressure variable frequency pump set, a first injection main pipe, a first injection branch pipe, and a second injection branch pipe; the second injection control component includes a high-pressure servo pump set and a second injection main pipe. This invention can reduce manufacturing costs, reduce equipment footprint, and reduce environmental burden.

Description

Technical Field

[0001] This invention belongs to the field of internal high-pressure molding technology, and particularly relates to a vertical internal high-pressure molding hydraulic system. Background Technology

[0002] Internal high-pressure forming, also known as hydroforming, is a mainstream plastic forming process for hollow components. This process uses liquid as the forming medium and achieves the integral forming of various hollow tubular parts by precisely controlling the internal pressure and material flow characteristics. It boasts advantages such as high forming accuracy, good part integrity, and minimal subsequent processing. Compared to traditional stamping and welding processes, internal high-pressure forming can significantly improve part rigidity, reduce subsequent processing steps, and achieve significant weight reduction.

[0003] With the rapid development of lightweight technology in the automotive, aerospace, and engineering machinery industries, the application scenarios of hollow lightweight structural parts continue to expand. The internal high-pressure forming process, with its unique forming advantages, has been widely used in the mass production of various irregular-shaped pipes and hollow structural parts. Related forming processes and equipment have also been continuously developed and iterated.

[0004] Currently, horizontal internal high-pressure forming equipment is widely used in industrial production. Its typical operating mode is as follows: a high-pressure hydraulic pump station generates the working medium, which is then injected into the pipe through a complex valve assembly and actuators. Combined with the axial feed of a horizontal cylinder, the part is formed. While this technology is relatively mature, it still exhibits several limitations in practical engineering applications. Firstly, to ensure system stability and corrosion prevention, existing forming media often use specialized hydraulic oil or emulsions, which are costly. Furthermore, the waste liquid disposal process must meet environmental regulations, leading to complex and costly media management and subsequent treatment. Secondly, the horizontal structure of the equipment results in horizontally parted molds, which are not only large and difficult to manufacture, but also require a large overall footprint, placing high demands on the spatial planning of the production workshop. In view of the shortcomings of the existing technology, such as high media cost, heavy environmental treatment burden and large equipment footprint, it is necessary to develop a new type of internal high-pressure forming system to reduce manufacturing costs, reduce equipment footprint and reduce environmental burden. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical internal high-pressure forming hydraulic system that can reduce manufacturing costs, reduce equipment footprint, and reduce environmental burden.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a vertical internal high-pressure forming water pressure system, comprising a control unit, a water supply unit, a water purification unit, a forming unit, and a control unit; The water replenishment unit includes a water replenishment tank and a water replenishment level control component. The water replenishment tank is provided with a first water inlet, a first water outlet, a second water outlet, and a drain outlet. The first water inlet is connected to an external water source and is equipped with an inlet valve. The water replenishment level control component is used to detect the water level data in the water replenishment tank and control the opening and closing of the inlet valve according to the water level data. The drain outlet is equipped with a drain valve. The first water outlet is equipped with a first drain valve. The second water outlet is equipped with a second drain valve. The water purification unit includes a water purification tank, a water purification component, and a water purification level control component. The water purification tank is provided with a second inlet, a third outlet, and a fourth outlet. The inlet and outlet of the water purification component are respectively connected to the first outlet of the water replenishment tank and the second inlet of the water purification tank. The water purification component is used to filter the water discharged from the water replenishment tank and transport the filtered water to the water purification tank. The water purification level control component is used to detect the water level data in the water purification tank and control the opening and closing of the water purification component according to the water level data. A third drain valve is provided at the third outlet. The forming unit includes a first forming device and a second forming device. The first forming device and the second forming device adopt a vertical forming structure. The water used for forming is directly transported to the cavity of the first forming device and the water used for forming is transported to the bladder inside the cavity of the second forming device. The control unit includes a main controller, a first injection control component, and a second injection control component. The first injection control component includes a low-pressure variable frequency pump set, a first injection main pipe, a first injection branch pipe, and a second injection branch pipe. The inlet of the low-pressure variable frequency pump set is connected to the second outlet of the water supply tank, and the outlet of the low-pressure variable frequency pump set is connected to one side of the first injection main pipe. The other side of the first injection main pipe is connected to one side of the first injection branch pipe and one side of the second injection branch pipe. The other side of the first injection branch pipe delivers water to the cavity of the first molding equipment through the lower mold of the first molding equipment. The second injection branch pipe delivers water to the bladder inside the cavity of the second molding equipment through the upper mold of the second molding equipment. The first injection branch pipe and the second injection branch pipe are respectively equipped with a first valve and a second valve. A third valve is connected to the first injection main pipe. A drain pipe is connected to the first injection main pipe, and a fourth drain valve is connected to the drain pipe. The second injection control component includes a high-pressure servo pump group and a second injection main pipe. The inlet and outlet of the high-pressure servo pump group are connected to the third outlet of the water tank and one side of the second injection main pipe, respectively. The other side of the second injection main pipe is connected to one side of the third injection branch pipe and one side of the fourth injection branch pipe. The other side of the third injection branch pipe delivers water to the cavity of the first molding equipment through the upper mold of the first molding equipment. The third injection branch pipe is equipped with a fourth valve and a first pressure detector. The other side of the fourth injection branch pipe is connected to the first injection main pipe, and a fifth valve is connected to the fourth injection branch pipe. The outlet of the high-pressure servo pump group is connected to a first detection pipe, which is connected to the fourth outlet of the water tank. A pressure regulating valve and a first pressure gauge are connected to the first detection pipe. The second injection main pipe is also connected to an exhaust pipe, a second detection pipe, and an overflow pipe. The exhaust pipe is equipped with an exhaust valve and a flow meter, which is used to detect water flow signals. The overflow pipe is equipped with an overflow valve. The second detection pipe is connected to a manual pressure relief valve and a second pressure gauge. The main controller is connected to the water replenishment level control component, the water inlet valve, the water purification component, the water purification level control component, the low-pressure variable frequency pump group, the first drain valve, the second drain valve, the first valve, the second valve, the third valve, the third drain valve, the fourth drain valve, the high-pressure servo pump group, the fourth valve, the first pressure detector, the fifth valve, the exhaust valve, the flow meter, and the overflow valve.

[0007] Furthermore, the water purification assembly includes a filter pump set and a filter. The inlet of the filter pump set is connected to the first outlet of the water supply tank, and the outlet of the filter pump set is connected to the inlet of the filter via a purified water pipe. A first check valve is installed on the purified water pipe. The outlet of the filter is connected to the second inlet of the purified water tank.

[0008] Furthermore, the water replenishment level control component includes a float-type water inlet controller, a water replenishment level gauge, and a water replenishment level control relay; the float-type water inlet controller and the water replenishment level gauge are installed inside the water replenishment tank; the water replenishment level gauge is used to detect the water level data in the water replenishment tank and send it to the water replenishment level control relay; the water replenishment level relay sends a control command to the main controller according to the water level data; the main controller opens and closes the water inlet valve according to the control command; the float-type water inlet controller and the water inlet valve are connected in series.

[0009] Furthermore, the purified water level control component includes a purified water level gauge and a purified water level control relay. The purified water level gauge is used to detect the water level data in the purified water tank and send it to the purified water level control relay. The purified water level control relay sends a signal to the main controller according to the water level data. The main controller opens and closes the purified water component and the first drain valve according to the signal.

[0010] Furthermore, a second check valve is provided between the drainage pipe and the low-pressure variable frequency pump set.

[0011] Furthermore, a second pressure detector is provided at the connection between the fourth injection branch pipe and the first injection main pipe, and the second pressure detector is connected to the main controller.

[0012] Furthermore, the water replenishment tank and the purified water tank are made of stainless steel.

[0013] Furthermore, the water pumps of the high-pressure servo pump set, the low-pressure variable frequency pump set, and the filter pump set are stainless steel centrifugal pumps, which are vertically installed in the pit.

[0014] Furthermore, the overflow valve is controlled by a servo motor.

[0015] The working principle of this technical solution is as follows: The main controller opens the second, third, and first drain valves to fill the low-pressure variable frequency pump group, high-pressure servo pump group, and filter pump group with water. When the water supply level control relay alarms at a low level, the float-type water inlet controller is in a water-allowed state, and the main controller controls the inlet valve to open and fill the water supply tank. When the water supply level control relay alarms at a high level, the float-type water inlet controller is in a water-not-allowed state, and the main controller controls the inlet valve to close, stopping water filling. When the purified water level control relay alarms at a low level, the main controller starts the filter pump group and filter, and water in the water supply tank flows into the purified water tank through the filter pump group, the first check valve, and the filter. When the purified water level control relay alarms at a high level, the main controller shuts down the filter pump group and filter.

[0016] The internal pressure during molding is set to less than 40 MPa, and tap water is not recycled.

[0017] When using the first molding equipment: Fill the water tank and clean water tank with the appropriate amount of water, power on the equipment, and start the system. Step 1: Open the vent valve, start the low-pressure variable frequency pump set and the third valve, and pump water through the first injection main pipe and the first injection branch pipe, through the lower mold of the first molding equipment, into the cavity of the first molding equipment. When the cavity of the first molding equipment is full of water, the flow meter detects water flow and sends a feedback signal to the main controller, which then closes the vent valve. Step 2: Start the high-pressure servo pump set, and pump water through the second injection main pipe and the third injection branch pipe, through the upper mold of the first molding equipment, into the cavity of the first molding equipment. The first pressure detector monitors the pressure data in real time, and the main controller uses product forming pressure feedback to perform closed-loop pressure control of the high-pressure servo pump set, ensuring the product reaches the initial forming requirements. Step 3: The slider of the first molding equipment descends to press the product, while the high-pressure servo pump set continues to pump water through the second injection main pipe and the third injection branch pipe, through the upper mold of the first molding equipment, into the cavity of the first molding equipment, completing the product shaping. Step 4: The slider of the first forming device continues to descend and press the product. Simultaneously, the internal volume of the cavity in the first forming device decreases. Based on the product specifications, the overflow valve passively overflows, precisely controlling the forming pressure within the product cavity to complete the film application process. Once all actions are completed and the set product specifications are achieved, the slider of the first forming device depressurizes, and the main controller opens the third and fourth drain valves to drain the product.

[0018] When using the second molding equipment: Fill the water tank and the clean water tank with the appropriate amount of water, power on the equipment, and start the system. Step 1: The main controller opens the fifth valve, starting the low-pressure variable frequency pump unit to deliver water through the first injection main pipe and the second injection branch pipe, through the upper mold of the second molding equipment, into the bladder inside the mold cavity of the second molding equipment. Based on the detection data or time interval of the second pressure detector, the low-pressure variable frequency pump unit is powered off, and simultaneously the exhaust valve is powered on to exhaust air. This process is repeated. When the mold cavity of the second molding equipment is full of water, the flow meter detects a large flow of water and sends a feedback signal to the main controller, at which point the low-pressure variable frequency pump unit and the exhaust valve are powered off. Step 2: The fifth valve remains open, and the high-pressure servo pump unit is started to deliver water through the fourth injection branch pipe, the first injection main pipe, and through the upper mold of the second molding equipment into the mold cavity of the second molding equipment. The second pressure detector monitors the pressure data in real time. The main controller uses the product forming pressure feedback to perform closed-loop pressure control of the high-pressure servo pump unit, ensuring the product reaches the initial forming requirements. Step 3: The slider of the second molding equipment descends to press the product. Simultaneously, the high-pressure servo pump unit continues to deliver water through the fourth injection branch pipe, the first injection main pipe, and the upper mold of the second molding equipment into the cavity of the second molding equipment, completing product shaping. Step 4: The slider of the second molding equipment continues to descend to press the product. At the same time, the internal volume of the cavity of the second molding equipment decreases. According to the product specifications, the overflow valve passively overflows to precisely control the forming pressure within the product cavity, completing the product lamination process. After all actions are completed and the set product specifications are achieved, the slider of the second molding equipment depressurizes, the fifth valve closes, and the third and fourth drain valves open to drain water.

[0019] The beneficial effects of this technical solution are as follows: ① This invention uses tap water as the forming medium, replacing the specialized hydraulic oil or emulsion commonly used in traditional internal high-pressure forming processes. Tap water is widely available and inexpensive. Furthermore, this invention designates the medium as non-recyclable, eliminating the necessary medium recovery, filtration, purification, and regeneration processes required in traditional processes, fundamentally avoiding environmental treatment costs associated with wastewater discharge. Simultaneously, the forming internal pressure is set to less than 40 MPa. At this pressure level, tap water can meet the forming requirements without the addition of any lubricating or rust-inhibiting additives, further reducing the medium formulation cost.

[0020] ② This invention adopts a vertical forming structure, which differs from existing horizontal internal high-pressure forming equipment. The vertical layout makes the mold parting surface horizontal, greatly simplifies the mold structure, and significantly reduces the processing difficulty; at the same time, the equipment's footprint in the workshop is greatly reduced, which is conducive to the rational layout of the production site and the improvement of space utilization.

[0021] ③ This invention uses a stainless steel water tank, which, compared to traditional carbon steel water tanks, not only has a neater and more aesthetically pleasing appearance but also significantly reduces weight, facilitating manufacturing, transportation, and installation. Stainless steel also possesses excellent corrosion resistance, effectively preventing rust caused by prolonged contact with tap water and extending the equipment's service life.

[0022] ④ This invention uses a servo motor in conjunction with a relief valve to achieve precise control of system pressure, replacing the expensive and complex proportional relief valve or servo valve in traditional hydraulic systems. The servo motor and relief valve combination has a simple structure, fast response speed, and control accuracy that meets the requirements of this process (forming internal pressure <40MPa). At the same time, it significantly reduces the hardware cost and debugging difficulty of the electrical control system, and facilitates maintenance and troubleshooting.

[0023] ⑤ Because this invention uses vertical molding and has a low internal molding pressure (<40MPa), the expansion force on the mold is significantly less than that of traditional high-pressure processes. The mold cavity wall thickness can be reduced, the mold structure complexity is reduced, and there is no need for complex horizontal parting and side core pulling mechanisms. The mold processing cycle is shortened, the manufacturing cost is significantly reduced, and the installation, debugging, and replacement of the mold are also more convenient.

[0024] ⑥ This invention employs a combined control scheme of an inlet valve and a float-type inlet controller in the water supply tank control. When the float-type inlet controller is working normally, the inlet valve opens and closes according to the process sequence. If the float-type inlet controller malfunctions or becomes stuck, the inlet valve can be forcibly shut off based on a preset liquid level signal or time parameter, forming dual redundancy protection to avoid the potential accident hazard of the water tank overflowing and flooding the workshop due to the failure of a single controller. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a vertical internal high-pressure forming hydraulic system according to the present invention. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Water supply tank; 2. First water inlet; 3. First water outlet; 4. Second water outlet; 5. Sewage outlet; 6. Water inlet valve; 7. Sewage outlet valve; 8. First drain valve; 9. Second drain valve; 10. Float-type water inlet controller; 11. Water supply level gauge; 12. Water supply level control relay; 13. Clean water tank; 14. Second water inlet; 15. Third water outlet; 16. Fourth water outlet; 17. Third drain valve; 18. Filter pump set; 19. Filter; 20. Clean water pipeline; 21. First check valve; 22. Clean water level gauge; 23. Clean water level control relay; 24. First molding equipment; 25. Second molding equipment; 26. Cavity of the first molding equipment; 27. Bladder inside the cavity of the second molding equipment; 28. Low-pressure variable frequency pump set; 29. ​​First injection main pipe; 30. First injection branch pipe; 21. Second... Injection pipe 31, lower mold of the first molding equipment 32, upper mold of the second molding equipment 33, third valve 34, drainage pipe 35, fourth drainage valve 36, second check valve 37, high-pressure servo pump set 38, second injection main pipe 39, third injection branch pipe 40, fourth injection branch pipe 41, upper mold of the first molding equipment 42, slider of the first molding equipment 43, first pressure detector 44, fifth valve 45, second pressure detector 46, first detection pipe 47, pressure regulating valve 48, first pressure gauge 49, exhaust pipe 50, second detection pipe 51, overflow pipe 52, exhaust valve 53, flow meter 54, overflow valve 55, servo motor 56, manual pressure relief valve 57, second pressure gauge 58, slider of the second molding equipment 59, third check valve 60.

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The basic implementation examples are as follows: Figure 1 As shown: A vertical internal high-pressure forming hydraulic system includes a control unit, a water supply unit, a water purification unit, a forming unit, and a control unit.

[0029] The water replenishment unit includes a water replenishment tank 1 (a stainless steel square tank) and a water replenishment level control component. The water replenishment tank 1 is equipped with a first inlet 2, a first outlet 3, a second outlet 4, and a drain outlet 5. The first inlet 2 is connected to an external water source and is equipped with an inlet valve 6. The water replenishment level control component is used to detect the liquid level data in the water replenishment tank 1 and control the opening and closing of the inlet valve 6 according to the liquid level data. A drain valve 7 is equipped at the drain outlet 5; a first drain valve 8 is equipped at the first outlet 3; and a second drain valve 9 is equipped at the second outlet 4. The water replenishment level control assembly includes a float-type inlet controller 10, a water replenishment level gauge 11, and a water replenishment level control relay 12. The float-type inlet controller 10 and the water replenishment level gauge 11 are installed inside the water replenishment tank 1. The water replenishment level gauge 11 detects the water level data in the water replenishment tank 1 and sends it to the water replenishment level control relay 12. The water replenishment level relay sends a control command to the main controller based on the water level data. The main controller opens and closes the inlet valve 6 according to the control command. The float-type inlet controller 10 and the inlet valve 6 are connected in series.

[0030] The water purification unit includes a water tank 13 (a stainless steel square tank), a water purification assembly, and a water level control assembly. The water tank 13 has a second inlet 14, a third outlet 15, and a fourth outlet 16. The inlet and outlet of the water purification assembly are connected to the first outlet 3 of the water supply tank 1 and the second inlet 14 of the water tank 13, respectively. The water purification assembly filters the water discharged from the water supply tank 1 and delivers the filtered water to the water tank 13. The water level control assembly detects the water level in the water tank 13 and controls the opening and closing of the water purification assembly based on the water level data. A third drain valve 17 is located at the third outlet 15. The water purification assembly includes a filter pump set 18 and a filter 19. The inlet of the filter pump set 18 is connected to the first outlet 3 of the water supply tank 1, and the outlet of the filter pump set 18 is connected to the inlet of the filter 19 via a purified water pipe 20. A first check valve 21 is installed on the purified water pipe 20. The outlet of the filter 19 is connected to the second inlet 14 of the purified water tank 13. The purified water level control assembly includes a purified water level gauge 22 and a purified water level control relay 23. The purified water level gauge 22 is used to detect the water level data in the purified water tank 13 and send it to the purified water level control relay 23. The purified water level control relay 23 sends a signal to the main controller according to the water level data. The main controller opens and closes the water purification assembly and the first drain valve 8 according to the signal.

[0031] The forming unit includes a first forming device 24 and a second forming device 25. The first forming device 24 and the second forming device 25 adopt a vertical forming structure. The water used for forming is directly transported to the cavity 26 of the first forming device and the water used for forming is transported to the bladder 27 inside the cavity of the second forming device.

[0032] The control unit includes a main controller, a first injection control component, and a second injection control component. The first injection control component includes a low-pressure variable frequency pump set 28, a first injection main pipe 29, a first injection branch pipe 30, and a second injection branch pipe 31. The inlet of the low-pressure variable frequency pump set 28 is connected to the second outlet 4 of the water supply tank 1, and the outlet of the low-pressure variable frequency pump set 28 is connected to one side of the first injection main pipe 29. The other side of the first injection main pipe 29 is connected to one side of the first injection branch pipe 30 and one side of the second injection branch pipe 31, respectively. The other side of the first injection branch pipe 30 delivers water to the cavity 26 of the first molding equipment through the lower mold 32 of the first molding equipment. The second injection branch pipe 31 delivers water to the bladder 27 inside the cavity of the second molding equipment through the upper mold 33 of the second molding equipment. The first injection branch pipe 30 and the second injection branch pipe 31 are respectively equipped with a first valve and a second valve. A third valve 34 is connected to the first injection main pipe 29; a drainage pipe 35 is connected to the first injection main pipe 29; a fourth drainage valve 36 is connected to the drainage pipe 35; the drainage pipe 35 is located between the third valve 34 and the low-pressure variable frequency pump group 28; a second check valve 37 is provided between the drainage pipe 35 and the low-pressure variable frequency pump group 28.

[0033] The second injection control component includes a high-pressure servo pump set 38 and a second injection main pipe 39. The inlet and outlet of the high-pressure servo pump set 38 are connected to the third outlet 15 of the water tank 13 and one side of the second injection main pipe 39, respectively. The other side of the second injection main pipe 39 is connected to one side of the third injection branch pipe 40 and one side of the fourth injection branch pipe 41, respectively. The other side of the third injection branch pipe 40 delivers water to the cavity 26 of the first molding equipment through the upper mold 42 of the first molding equipment. The third injection branch pipe 40 is equipped with a fourth valve and a first pressure detector 44. The other side of the fourth injection branch pipe 41 is connected to the first injection main pipe 29, and a fifth valve 45 is connected to the fourth injection branch pipe 41. A second pressure detector 46 is provided at the connection between the fourth injection branch pipe 41 and the first injection main pipe 29. The outlet of the high-pressure servo pump set 38 is connected to a first detection pipe 47, which is connected to the fourth outlet 16 of the water tank 13. A pressure regulating valve 48 and a first pressure gauge 49 are connected to the first detection pipe 47. The second injection main pipe 39 is equipped with a third check valve 60. The second injection main pipe 39 is also connected to an vent pipe 50, a second detection pipe 51, and an overflow pipe 52. The vent pipe 50 is equipped with an vent valve 53 and a flow meter 54, which is used to detect water flow signals. The overflow pipe 52 is equipped with an overflow valve 55, which is controlled by a servo motor 56, which is controlled by the main controller. Multiple overflow pipes 52 can be installed, and different overflow valves 55 can be selected according to product specifications. The second detection pipe 51 is connected to a manual pressure relief valve 57 (specifically a safety ball valve) and a second pressure gauge 58.

[0034] The main controller is connected to the water replenishment level control component, water inlet valve 6, water purification component, water purification level control component, low-pressure variable frequency pump group 28, first drain valve 8, second drain valve 9, first valve, second valve, third valve 34, third drain valve 17, fourth drain valve 36, high-pressure servo pump group 38, fourth valve, first pressure detector 44, fifth valve 45, second pressure detector 46, exhaust valve 53, flow meter 54 and overflow valve 55 respectively.

[0035] The fourth drain valve 36, the third valve 34, the fifth valve 45, the air vent valve 53, and the water inlet valve 6 are all solenoid valves. Among them, the water inlet valve 6 and the fourth drain valve 36 are low-pressure solenoid valves, while the third valve 34, the fifth valve 45, and the air vent valve 53 are high-pressure solenoid valves.

[0036] The low-pressure variable frequency pump unit 28 consists of a variable frequency motor M1 and a low-pressure centrifugal pump P1. The high-pressure servo pump unit 38 consists of a servo motor M2 and a high-pressure centrifugal pump P2. The filter pump unit 18 consists of an AC motor M3 and a centrifugal pump P3.

[0037] The water pumps of the high-pressure servo pump set 38, the low-pressure variable frequency pump set 28 and the filter pump set 18 are made of stainless steel centrifugal pumps, which are vertically installed in the pit.

[0038] The specific implementation process is as follows: The main controller opens the second drain valve 9, the third drain valve 17, and the first drain valve 8, filling the low-pressure variable frequency pump group 28, the high-pressure servo pump group 38, and the filter pump group 18 with water. When the water supply level control relay 12 alarms for a low level, the float-type water inlet controller 10 is in a water-allowed state, and the main controller controls the water inlet valve 6 to open and fill the water supply tank 1 with water. When the water supply level control relay 12 alarms for a high level, the float-type water inlet controller 10 is in a water-inaccessible state, and the main controller controls the water inlet valve 6 to close, stopping water filling. When the purified water level control relay 23 alarms for a low level, the main controller starts the filter pump group 18 and the filter 19, and the water in the water supply tank 1 flows into the purified water tank 13 through the filter pump group 18, the first check valve 21, and the filter 19. When the purified water level control relay 23 alarms for a high level, the main controller shuts down the filter pump group 18 and the filter 19.

[0039] The internal pressure during molding is set to less than 40 MPa, and tap water is not recycled.

[0040] When using the first molding equipment 24 for molding: Fill the water tank 1 and the clean water tank 1 with the appropriate amount of water, power on the equipment, and start the system. Step 1: Open the exhaust valve 53, start the low-pressure variable frequency pump group 28 and the third valve 34, and pump water through the first injection main pipe 29 and the first injection branch pipe 30, through the lower mold 32 of the first molding equipment, into the cavity 26 of the first molding equipment. When the cavity 26 of the first molding equipment is full of water, the flow meter 54 detects the water flow and sends a feedback signal to the main controller, which then closes the exhaust valve 53. Step 2: Start the high-pressure servo pump group 38, and pump water through the second injection main pipe 39 and the third injection branch pipe 40, through the upper mold 42 of the first molding equipment, into the cavity 26 of the first molding equipment. The first pressure detector 44 monitors the pressure data in real time. The main controller uses product forming pressure feedback to perform closed-loop pressure control of the high-pressure servo pump group 38, ensuring the product reaches the initial forming requirements. Step 3: The slider 43 of the first molding equipment descends to press the product. Simultaneously, the high-pressure servo pump unit 38 continues to pump water through the second injection main pipe 39 and the third injection branch pipe 40, delivering it through the upper mold 42 of the first molding equipment into the cavity 26 of the first molding equipment, completing product shaping. Step 4: The slider 43 of the first molding equipment continues to descend to press the product. Simultaneously, the internal volume of the cavity 26 of the first molding equipment decreases. According to the product specifications, the overflow valve 55 passively overflows, precisely controlling the forming pressure within the product cavity to complete the product lamination process. Once all actions are completed and the set product specifications are achieved, the slider 43 of the first molding equipment depressurizes, and the main controller opens the third valve 34 and the fourth drain valve 36 to drain the water.

[0041] When using the second molding device 25 for molding: Fill the water tank 1 and the clean water tank 1 with the appropriate amount of water, power on the equipment, and start the system. Step 1: The main controller opens the fifth valve 45, starting the low-pressure variable frequency pump group 28. Water is pumped through the first injection main pipe 29 and the second injection branch pipe 31, through the upper mold 33 of the second molding device, into the bladder 27 inside the cavity of the second molding device. Based on the detection data or time interval of the second pressure detector 46, the low-pressure variable frequency pump group 28 is de-energized, and simultaneously the exhaust valve 53 is energized to exhaust air. This process is repeated. When the cavity of the second molding device 25 is full of water, the flow meter 54 detects a large flow of water and sends a feedback signal to the main controller, de-energizing the low-pressure variable frequency pump group 28 and the exhaust valve 53. Step 2: With the fifth valve 45 open, the high-pressure servo pump unit 38 is activated, delivering water through the fourth injection branch pipe 41, the first injection main pipe 29, the second injection branch pipe 31, and the upper mold 33 of the second molding equipment to the air bladder 27 within the cavity of the second molding equipment. The second pressure detector 46 monitors the pressure data in real time. The main controller uses product forming pressure feedback to perform closed-loop pressure control of the high-pressure servo pump unit 38, ensuring the product reaches the initial forming requirements. Step 3: The slider 59 of the second molding equipment descends to press the product. Simultaneously, the high-pressure servo pump unit 38 continues to deliver water through the fourth injection branch pipe 41, the first injection main pipe 29, and the upper mold 33 of the second molding equipment to the air bladder 27 within the cavity of the second molding equipment, completing product shaping. Step 4: The slider 59 of the second molding equipment continues to descend to press the product. Simultaneously, the internal volume of the cavity of the second molding equipment 25 decreases. According to the product specifications, the overflow valve 55 passively overflows, precisely controlling the forming pressure within the product cavity to complete the product lamination process. Once all actions are completed and the set product specifications are achieved, the slider 59 of the second molding equipment is depressurized, the fifth valve 45 is closed, and the third valve 34 and the fourth drain valve 36 are opened to perform the drainage action.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A vertical internal high-pressure forming hydraulic system, characterized in that: It includes a control unit, a water supply unit, a water purification unit, a molding unit, and a control unit; The water replenishment unit includes a water replenishment tank (1) and a water replenishment level control component. The water replenishment tank (1) is provided with a first water inlet (2), a first water outlet (3), a second water outlet (4), and a drain outlet (5). The first water inlet (2) is connected to an external water source. A water inlet valve (6) is provided at the first water inlet (2). The water replenishment level control component is used to detect the liquid level data in the water replenishment tank (1) and control the opening and closing of the water inlet valve (6) according to the liquid level data. A drain valve (7) is provided at the drain outlet (5). A first drain valve (8) is provided at the first water outlet (3). A second drain valve (9) is provided at the second water outlet (4). The water purification unit includes a water purification tank (13), a water purification component, and a water purification level control component. The water purification tank (13) is provided with a second inlet (14), a third outlet (15), and a fourth outlet (16). The inlet and outlet of the water purification component are respectively connected to the first outlet (3) of the water replenishment tank (1) and the second inlet (14) of the water purification tank (13). The water purification component is used to filter the water discharged from the water replenishment tank (1) and transport the filtered water to the water purification tank (13). The water purification level control component is used to detect the liquid level data in the water purification tank (13) and control the opening and closing of the water purification component according to the liquid level data. A third drain valve (17) is provided at the third outlet (15). The forming unit includes a first forming device (24) and a second forming device (25). The first forming device (24) and the second forming device (25) adopt a vertical forming structure. The water for forming is directly transported to the cavity (26) of the first forming device and the water for forming is transported to the bladder (27) inside the cavity of the second forming device. The control unit includes a main controller, a first injection control component, and a second injection control component. The first injection control component includes a low-pressure variable frequency pump set (28), a first injection main pipe (29), a first injection branch pipe (30), and a second injection branch pipe (31). The inlet of the low-pressure variable frequency pump set (28) is connected to the second outlet (4) of the water supply tank (1), and the outlet of the low-pressure variable frequency pump set (28) is connected to one side of the first injection main pipe (29). The other side of the first injection main pipe (29) is connected to one side of the first injection branch pipe (30) and one side of the second injection branch pipe (31), respectively. The other side of the branch pipe (30) delivers water to the cavity (26) of the first molding equipment through the lower mold (32) of the first molding equipment; the second injection branch pipe (31) delivers water to the bladder (27) inside the cavity of the second molding equipment through the upper mold (33) of the second molding equipment; the first injection branch pipe (30) and the second injection branch pipe (31) are respectively provided with a first valve and a second valve; the first injection main pipe (29) is connected to a third valve (34); the first injection main pipe (29) is connected to a drain pipe (35), and the drain pipe (35) is connected to a fourth drain valve (36); The second injection control component includes a high-pressure servo pump group (38) and a second injection main pipe (39). The inlet and outlet of the high-pressure servo pump group (38) are respectively connected to the third outlet (15) of the water tank (13) and one side of the second injection main pipe (39). The other side of the second injection main pipe (39) is respectively connected to one side of the third injection branch pipe (40) and one side of the fourth injection branch pipe (41). The other side of the third injection branch pipe (40) delivers water to the cavity (26) of the first molding equipment through the upper mold (42) of the first molding equipment. The third injection branch pipe (40) is equipped with a fourth valve and a first pressure detector (44). The other side of the fourth injection branch pipe (41) is connected to the first injection main pipe (29). 41) is connected to a fifth valve (45); the outlet of the high-pressure servo pump group (38) is connected to a first detection pipe (47), the first detection pipe (47) is connected to the fourth outlet (16) of the clean water tank (13), the first detection pipe (47) is connected to a pressure regulating valve (48) and a first pressure gauge (49); the second injection main pipe (39) is also connected to an exhaust pipe (50), a second detection pipe (51) and an overflow pipe (52), the exhaust pipe (50) is equipped with an exhaust valve (53) and a flow meter (54), the flow meter (54) is used to detect water flow signals; the overflow pipe (52) is equipped with an overflow valve (55); the second detection pipe (51) is connected to a manual pressure relief valve (57) and a second pressure gauge (58); The main controller is connected to the water replenishment level control component, the water inlet valve (6), the water purification component, the water purification level control component, the low-pressure variable frequency pump group (28), the first drain valve (8), the second drain valve (9), the first valve, the second valve, the third valve (34), the third drain valve (17), the fourth drain valve (36), the high-pressure servo pump group (38), the fourth valve, the first pressure detector (44), the fifth valve (45), the exhaust valve (53), the flow meter (54), and the overflow valve (55).

2. The vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: The water purification assembly includes a filter pump group (18) and a filter (19). The inlet of the filter pump group (18) is connected to the first outlet (3) of the water supply tank (1). The outlet of the filter pump group (18) is connected to the inlet of the filter (19) through a water purification pipe (20). A first check valve (21) is installed on the water purification pipe (20). The outlet of the filter (19) is connected to the second inlet (14) of the water purification tank (13).

3. The vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: The water replenishment level control component includes a float-type water inlet controller (10), a water replenishment level gauge (11), and a water replenishment level control relay (12). The float-type water inlet controller (10) and the water replenishment level gauge (11) are installed in the water replenishment tank (1). The water replenishment level gauge (11) is used to detect the water level data in the water replenishment tank (1) and send it to the water replenishment level control relay (12). The water replenishment level relay sends a control command to the main controller according to the water level data. The main controller opens and closes the water inlet valve (6) according to the control command. The float-type water inlet controller (10) and the water inlet valve (6) are connected in series.

4. The vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: The purified water level control component includes a purified water level gauge (22) and a purified water level control relay (23). The purified water level gauge (22) is used to detect the water level data in the purified water tank (13) and send it to the purified water level control relay (23). The purified water level control relay (23) sends a signal to the main controller according to the water level data. The main controller opens and closes the purified water component and the first drain valve (8) according to the signal.

5. A vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: A second check valve (37) is provided between the drainage pipe (35) and the low-pressure variable frequency pump set (28).

6. The vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: A second pressure detector (46) is provided at the connection between the fourth injection branch pipe (41) and the first injection main pipe (29), and the second pressure detector (46) is connected to the main controller.

7. The vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: The water replenishment tank (1) and the clean water tank (13) are made of stainless steel.

8. A vertical internal high-pressure forming hydraulic system according to claim 2, characterized in that: The pumps of the high-pressure servo pump group (38), the low-pressure variable frequency pump group (28) and the filter pump group (18) are centrifugal pumps made of stainless steel, and the centrifugal pumps are installed vertically in the pit.

9. A vertical internal high-pressure forming hydraulic system according to claim 1, characterized in that: The overflow valve (55) is controlled by a servo motor (56).

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