Patch compaction manufacturing device based on double vacuum

Abstract

The utility model relates to a patch compaction manufacturing device based on double vacuum, which comprises an inner vacuum structure, the inner vacuum structure comprises a patch and a film, the device further comprises a pressure control exhaust mechanism, an accessory case, a pressure-bearing side plate and an upper cover, the pressure control exhaust mechanism and the pressure-bearing side plate are arranged in the accessory case, and the upper cover is arranged on the accessory case. The upper cover is installed on the pressure-bearing side plate, the accessory case, the pressure-bearing side plate and the upper cover form an outer vacuum cabin, the patch is installed on the accessory case, the film is installed on the patch and connected with the accessory case, an inner vacuum cabin is formed at the same time, and the pressure control exhaust mechanism is connected with the inner vacuum cabin and the outer vacuum cabin. Different requirements of the inner vacuum degree and the box body vacuum degree are fully considered, the box body exhaust hole and the inner vacuum exhaust hole are arranged, and meanwhile, gas paths of the inner vacuum cabin and the outer vacuum cabin are mutually independent, so that gas and volatile matters are exhausted more thoroughly, and pressure values of the inner vacuum cabin and the outer vacuum cabin can be independently controlled.

Description

Technical Field

[0001] This utility model relates to the field of patch manufacturing technology, and in particular to a patch compaction manufacturing device based on double vacuum. Background Technology

[0002] Currently, dual-vacuum compaction patch fabrication equipment used for repairing advanced composite laminate structures has the following shortcomings. First, the equipment, mostly made of metal, is bulky and has limited usable space, limiting its production to small patches and making it difficult to move. Second, the equipment's venting system is simply designed, requiring manual depressurization and lacking automatic internal pressure adjustment, resulting in low venting efficiency and a tendency for the fabricated patches to have excessive porosity. Furthermore, most of these devices are opaque or lack observation windows, preventing operators from directly and accurately observing the condition of the internal patches, thus affecting their practical effectiveness as repair tools and training demonstration equipment.

[0003] Utility model patent CN220923364U discloses a composite material bonding and repair device. The device includes: a bonding patch applied to the repair area; a porous release liner applied to the part to be repaired and covering the bonding patch; an adhesive-absorbing layer covering the porous release liner, which directs gas from one side of the porous release liner away from the other and absorbs excess resin; a non-porous release liner covering the porous release liner, with the adhesive-absorbing layer partially opposite to the non-porous release liner; an electric blanket applied to the part to be repaired and covering the non-porous release liner; a breathable layer applied to the part to be repaired, covering the bonding patch, the porous release liner, the adhesive-absorbing layer, the non-porous release liner, and the electric blanket; and a vacuum bag film applied to the part to be repaired, forming a sealed cavity with the part to be repaired. The vacuum bag film has a vacuum nozzle communicating with the sealed cavity. This patent does not disclose the air path design of the sealed chamber, but it allows for independent control of the pressure within the sealed chamber.

[0004] Therefore, providing a patch manufacturing device that connects the air passages of different sealed chambers and can perform corresponding control is an urgent problem to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide a patch compaction device based on double vacuum.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of this utility model, a patch compaction fabrication device based on dual vacuum is provided, comprising an inner vacuum structure, the inner vacuum structure including a patch and a film, the device further comprising a pressure control venting mechanism, an accessory box, a pressure-bearing side plate, and a top cover, the pressure control venting mechanism and the pressure-bearing side plate being mounted on the accessory box, the top cover being mounted on the pressure-bearing side plate, the accessory box, the pressure-bearing side plate, and the top cover forming an outer vacuum chamber, the patch being mounted on the accessory box, the film being mounted on the patch and connected to the accessory box, simultaneously forming an inner vacuum chamber, and the pressure control venting mechanism being connected to both the inner and outer vacuum chambers.

[0008] As a preferred technical solution, the pressure control exhaust mechanism includes a housing exhaust port and an inner vacuum exhaust port, wherein the housing exhaust port is connected to the outer vacuum chamber, and the inner vacuum exhaust port is connected to the inner vacuum chamber.

[0009] As a preferred technical solution, the pressure control exhaust mechanism further includes an internal vacuum pipe, an internal vacuum passage valve, and an internal vacuum extraction nozzle. The internal vacuum exhaust port is connected to the internal vacuum pipe, the internal vacuum extraction nozzle is connected to the internal vacuum pipe, and the internal vacuum passage valve is installed on the internal vacuum pipe.

[0010] As a preferred technical solution, the pressure control exhaust mechanism further includes an internal vacuum pressure gauge and an internal vacuum pressure monitoring tube, wherein the internal vacuum pressure gauge and the internal vacuum pressure monitoring tube are connected, and the internal vacuum pressure monitoring tube is connected to the internal vacuum tube.

[0011] As a preferred technical solution, the pressure control exhaust mechanism further includes an internal vacuum pressure control handle, which is connected to the internal vacuum system air passage valve.

[0012] As a preferred technical solution, the pressure control exhaust mechanism further includes a housing air pipe, a housing air passage valve, and a housing air extraction nozzle. The housing exhaust port is connected to the housing air pipe, the housing air extraction nozzle is connected to the housing air pipe, and the housing air passage valve is installed on the housing air pipe.

[0013] As a preferred technical solution, the pressure control exhaust mechanism further includes a chamber pressure gauge and a chamber pressure monitoring air pipe, wherein the chamber pressure gauge and the chamber pressure monitoring air pipe are connected, and the chamber air passage valve is connected to the chamber pressure monitoring air pipe.

[0014] As a preferred technical solution, the pressure control exhaust mechanism further includes a timer and a housing air passage valve control module, wherein the timer and the housing air passage valve control module are communicatively connected, and the housing air passage valve and the housing air passage valve control module are communicatively connected.

[0015] As a preferred technical solution, the pressure control exhaust mechanism further includes a housing pressure control handle, which is communicatively connected to the housing air passage valve.

[0016] As a preferred technical solution, the device further includes a base and a conversion socket, which are mounted on the accessory box, and the exhaust vent of the box is mounted on the conversion socket.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model fully considers the different requirements of internal vacuum degree and chamber vacuum degree, and sets up chamber exhaust port and internal vacuum exhaust port. At the same time, the gas paths of the internal vacuum chamber and the external vacuum chamber are independent of each other, so that the gas and volatiles are discharged more thoroughly, and the pressure values ​​of the internal vacuum chamber and the external vacuum chamber can be controlled independently.

[0019] 2. This utility model places the adapter socket at the edge of the accessory box, which provides more space for the adapter socket's wiring and avoids bending.

[0020] 3. In this utility model, the timer is used to set the pressurization time of the chamber, and the air passage valve of the chamber opens automatically according to the signal given by the timer to release pressure.

[0021] 4. The internal vacuum pressure gauge and housing pressure gauge of this utility model can indicate the sealing failure of the gas circuit through the pressure gauge, which facilitates maintenance.

[0022] 5. The housing of this utility model can be made of materials selected according to the required pressure, and can be made of metal or non-metal materials. Therefore, it is particularly suitable for special occasions with high requirements for temperature and pressure resistance and corrosiveness. Attached Figure Description

[0023] Figure 1 This is an exploded view of the structure of this utility model;

[0024] Figure 2 This is a front view of the present invention.

[0025] 1. Base, 2. Accessory box, 3. Adapter socket, 4. Exhaust vent, 5. Internal vacuum exhaust vent, 6. Internal vacuum pressure gauge, 7. Chamber pressure gauge, 8. Internal vacuum pressure control handle, 9. Chamber pressure control handle, 10. Connection socket, 11. Timer, 12. Internal vacuum air pipe, 13. Chamber air pipe, 14. Internal vacuum pressure monitoring air pipe, 15. Chamber pressure monitoring air pipe, 16. Internal vacuum air passage valve, 17. Chamber air passage valve, 18. Internal vacuum suction nozzle, 19. Chamber air passage valve control module, 20. Pressure-bearing side plate, 21. Top cover, 22. Chamber suction nozzle. Detailed Implementation

[0026] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0027] Currently, dual-vacuum compaction patch fabrication equipment used for repairing advanced composite laminate structures has the following shortcomings. First, the equipment, mostly made of metal, is bulky and has limited usable space, limiting its production to small patches and making it difficult to move. Second, the equipment's venting system is simply designed, requiring manual depressurization and lacking automatic internal pressure adjustment, resulting in low venting efficiency and a tendency for the fabricated patches to have excessive porosity. Furthermore, most of these devices are opaque or lack observation windows, preventing operators from directly and accurately observing the condition of the internal patches, thus affecting their practical effectiveness as repair tools and training demonstration equipment.

[0028] The concept of this invention is as follows: A composite material repair patch is placed within a normal vacuum system, and a second vacuum system is created outside this system using a robust outer casing. Because the outer casing is rigid, the secondary vacuuming operation prevents atmospheric pressure from pressurizing the patch inside the inner bag. This double vacuum operation helps prevent air bubbles from forming within the laminated patch and promotes the removal of gas from the inner bag. The patch is heated using an electric blanket, with the output controlled by a thermocouple, to a predetermined temperature to reduce resin viscosity and further improve the removal of air and volatiles from the patch. Once the degassing cycle is complete, the chamber is ventilated automatically or manually, allowing atmospheric pressure to re-enter the chamber and create positive pressure on the inner vacuum bag, thereby compacting the patch and making its lamination tighter.

[0029] This invention utilizes the good rigidity and high temperature resistance of wood and acrylic sheets, enabling the equipment to operate under high temperature and pressure conditions. A transparent top cover allows visualization of the patch fabrication process inside the chamber, facilitating repair process control and training demonstrations. A convenient exhaust device allows for easy adjustment of the internal pressure, enabling the equipment to operate under higher pressure conditions. The invention also includes a control panel on the outside of the chamber for setting the exhaust time and automatically opening the pressure relief valve. A manual pressure relief knob is also incorporated, allowing for both automatic and manual pressure relief functions.

[0030] This invention provides a patch compaction fabrication device based on dual vacuum. It fully considers the different requirements of internal and chamber vacuum levels, incorporating both chamber exhaust vents and internal vacuum exhaust vents. Furthermore, the gas paths of the inner and outer vacuum chambers are independent, ensuring more thorough gas and volatile matter removal and allowing independent control of their pressure values. The adapter socket is pre-positioned at the edge of the accessory box, providing more space for wiring and preventing bending. A timer is used to set the chamber pressurization time, and the chamber's gas path valves automatically open based on the timer's signal, releasing pressure. The internal vacuum pressure gauge and chamber pressure gauge indicate potential gas path sealing failures, facilitating maintenance. The chamber material can be selected according to the required pressure, using either metallic or non-metallic materials, making it particularly suitable for applications requiring high temperature and pressure resistance, or in corrosive environments.

[0031] Example 1

[0032] like Figure 1 and Figure 2 As shown, a patch compaction fabrication device based on dual vacuum includes an inner vacuum structure comprising a patch and a film. The device also includes a pressure-controlled venting mechanism, an accessory box 2, a pressure-bearing side plate 20, and a top cover 21. The pressure-controlled venting mechanism and the pressure-bearing side plate 20 are mounted on the accessory box 2, and the top cover 21 is mounted on the pressure-bearing side plate 20. The accessory box 2, the pressure-bearing side plate 20, and the top cover 21 form an outer vacuum chamber. The patch is mounted on the accessory box 2, and the film is mounted on the patch and connected to the accessory box 2, thus forming an inner vacuum chamber. The pressure-controlled venting mechanism is connected to both the inner and outer vacuum chambers.

[0033] In this embodiment, the fabrication device mainly consists of an upper cover 21, a pressure-bearing side plate 20, and an accessory box 2 forming an outer vacuum chamber. The upper cover 21 can be made of fully transparent acrylic sheet, and the pressure-bearing side plate 20 can be made of wood. Bolts are used to connect the upper cover 21 and the pressure-bearing side plate 20. The accessory box 2 and the base 1 are made of aluminum alloy profiles, and a groove is pre-reserved on the accessory box 2 for sealing according to the thickness of the pressure-bearing side plate 20. The pressure-bearing side plate 20 and the accessory box 2 do not need to be physically connected. The box body composed of the upper cover 21 and the pressure-bearing side plate 20 can withstand a pressure of 100 kPa.

[0034] When making patches, the pressure in the inner vacuum chamber can reach 90 kPa, and the pressure inside the chamber can also reach the inner vacuum pressure value, so as to minimize the pressure difference between the inner and outer vacuum chambers, thereby helping to remove volatiles and gases; the top cover 21 can be used to inspect the inside of the equipment and for training demonstrations.

[0035] This device also includes a heat exchanger connection socket 10, an adapter socket 3, and a base 1. The base 1 and the adapter socket 3 are mounted on the accessory box 2, and the exhaust vent 4 of the box is mounted on the adapter socket 3. The base 1 is used for dust protection and sealing of the accessory box 2.

[0036] The adapter socket 3, made of thermocouple and electric blanket, is used as an adapter socket 3. The adapter socket 3, along with the housing exhaust port 4, internal vacuum exhaust port 5, internal vacuum pressure gauge 6, housing pressure gauge 7, internal vacuum pressure control handle 8, housing pressure control handle 9, connection socket 10, timer 11, internal vacuum air pipe 12, housing air pipe 13, internal vacuum pressure monitoring air pipe 14, housing pressure monitoring air pipe 15, internal vacuum air passage valve 16, housing air passage valve 17, internal vacuum suction nozzle 18, housing air passage valve control module 19, and housing suction nozzle 22, constitute the accessory box 2. During patch fabrication, the thermocouple and electric blanket adapter socket 3 are sealed inside the housing, and the heat patcher connection socket 10 enables heating control.

[0037] The pressure control exhaust mechanism includes a housing exhaust port 4 and an inner vacuum exhaust port 5. The housing exhaust port 4 is connected to the outer vacuum chamber, and the inner vacuum exhaust port 5 is connected to the inner vacuum chamber.

[0038] The pressure control exhaust mechanism also includes an internal vacuum pipe 12, an internal vacuum passage valve 16, and an internal vacuum suction nozzle 18. The internal vacuum exhaust port 5 is connected to the internal vacuum pipe 12, the internal vacuum suction nozzle 18 is connected to the internal vacuum pipe 12, and the internal vacuum passage valve 16 is installed on the internal vacuum pipe 12.

[0039] The pressure control exhaust mechanism also includes an internal vacuum pressure gauge 6 and an internal vacuum pressure monitoring tube 14, which are connected together, and the internal vacuum pressure monitoring tube 14 is connected to an internal vacuum tube 12.

[0040] The pressure control exhaust mechanism also includes an internal vacuum pressure control handle 8, which is connected to the internal vacuum system air passage valve 16.

[0041] In this embodiment, rotating the inner vacuum pressure control handle 8 selects the inner vacuum exhaust port, and the gas and volatiles in the inner vacuum chamber are discharged through the inner vacuum exhaust port 5, inner vacuum pipe 12, inner vacuum air passage valve 16, and inner vacuum suction nozzle 18 on the accessory box 2; rotating the inner vacuum pressure control handle 8 to control the inner vacuum air passage valve 16 can also manually release the pressure of the inner bag vacuum system.

[0042] The internal vacuum system pressure gauge 6 indicates the pressure of the internal vacuum system via the internal vacuum system pressure monitoring tube 14;

[0043] The pressure control exhaust mechanism also includes a housing air pipe 13, a housing air passage valve 17, and a housing air extraction nozzle 22. The housing exhaust port 4 is connected to the housing air pipe 13, the housing air extraction nozzle 22 is connected to the housing air pipe 13, and the housing air passage valve 17 is installed on the housing air pipe 13.

[0044] The pressure control exhaust mechanism also includes a chamber pressure gauge 7 and a chamber pressure monitoring air pipe 15, the chamber pressure gauge 7 and the chamber pressure monitoring air pipe 15 are connected, and the chamber air passage valve 17 and the chamber pressure monitoring air pipe 15 are connected.

[0045] The pressure control exhaust mechanism also includes a timer 11 and a housing air passage valve control module 19. The timer 11 and the housing air passage valve control module 19 are communicatively connected, and the housing air passage valve 17 and the housing air passage valve control module 19 are communicatively connected.

[0046] The pressure control exhaust mechanism also includes a housing pressure control handle 9, which is communicatively connected to the housing air passage valve 17.

[0047] In this embodiment, rotating the chamber pressure control handle 9 allows air inside the chamber to be discharged through the thermocouple, the chamber exhaust port 4 on the electric blanket adapter socket 3, the chamber air pipe 13, the chamber air passage valve 17, and the chamber air extraction nozzle 22. The chamber pressure gauge 7 indicates the pressure inside the chamber through the chamber pressure monitoring air pipe 15. The timer 11 is used to set the duration of pressure application to the chamber, which can be determined according to the material type of the repair patch. After setting the pressure application duration, the chamber pressure control handle 9 is used to manually release the chamber pressure.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A patch compaction fabrication apparatus based on dual vacuum, comprising an inner vacuum structure, wherein the inner vacuum structure includes a patch and a thin film, characterized in that, The device also includes a pressure-controlled exhaust mechanism, an accessory box (2), a pressure-bearing side plate (20), and a top cover (21). The pressure-controlled exhaust mechanism and the pressure-bearing side plate (20) are installed in the accessory box (2), and the top cover (21) is installed on the pressure-bearing side plate (20). The accessory box (2), the pressure-bearing side plate (20), and the top cover (21) form an outer vacuum chamber. The patch is installed on the accessory box (2), and the diaphragm is installed on the patch and connected to the accessory box (2), thus forming an inner vacuum chamber. The pressure-controlled exhaust mechanism is connected to the inner vacuum chamber and the outer vacuum chamber respectively.

2. The patch compaction fabrication device based on double vacuum according to claim 1, characterized in that, The pressure control exhaust mechanism includes a housing exhaust port (4) and an inner vacuum exhaust port (5). The housing exhaust port (4) is connected to the outer vacuum chamber, and the inner vacuum exhaust port (5) is connected to the inner vacuum chamber.

3. The patch compaction fabrication device based on double vacuum according to claim 2, characterized in that, The pressure control exhaust mechanism also includes an internal vacuum pipe (12), an internal vacuum passage valve (16), and an internal vacuum suction nozzle (18). The internal vacuum exhaust port (5) is connected to the internal vacuum pipe (12), the internal vacuum suction nozzle (18) is connected to the internal vacuum pipe (12), and the internal vacuum passage valve (16) is installed on the internal vacuum pipe (12).

4. The patch compaction fabrication device based on double vacuum according to claim 3, characterized in that, The pressure control exhaust mechanism also includes an internal vacuum pressure gauge (6) and an internal vacuum pressure monitoring tube (14), the internal vacuum pressure gauge (6) and the internal vacuum pressure monitoring tube (14) are connected, and the internal vacuum pressure monitoring tube (14) is connected to the internal vacuum tube (12).

5. The patch compaction fabrication device based on double vacuum according to claim 4, characterized in that, The pressure control exhaust mechanism also includes an internal vacuum pressure control handle (8), which is connected to an internal vacuum air passage valve (16).

6. The patch compaction fabrication device based on double vacuum according to claim 2, characterized in that, The pressure control exhaust mechanism also includes a housing air pipe (13), a housing air passage valve (17), and a housing air extraction nozzle (22). The housing exhaust hole (4) is connected to the housing air pipe (13), the housing air extraction nozzle (22) is connected to the housing air pipe (13), and the housing air passage valve (17) is installed on the housing air pipe (13).

7. The patch compaction fabrication apparatus based on double vacuum according to claim 6, characterized in that, The pressure control exhaust mechanism also includes a housing pressure gauge (7) and a housing pressure monitoring air pipe (15), the housing pressure gauge (7) and the housing pressure monitoring air pipe (15) are connected, and the housing air passage valve (17) and the housing pressure monitoring air pipe (15) are connected.

8. The patch compaction fabrication apparatus based on double vacuum according to claim 7, characterized in that, The pressure control exhaust mechanism also includes a timer (11) and a housing air passage valve control module (19). The timer (11) and the housing air passage valve control module (19) are connected in communication. The housing air passage valve (17) and the housing air passage valve control module (19) are also connected in communication.

9. The patch compaction fabrication apparatus based on double vacuum according to claim 8, characterized in that, The pressure control exhaust mechanism also includes a housing pressure control handle (9), which is communicatively connected to the housing air passage valve (17).

10. The patch compaction fabrication apparatus based on double vacuum according to claim 2, characterized in that, The device also includes a base (1) and a conversion socket (3), which are mounted on an accessory box (2), and the exhaust vent (4) of the box is mounted on the conversion socket (3).

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