Vacuum pipeline system and using method thereof

Abstract

The invention provides a vacuum pipeline system and a using method thereof. The vacuum pipeline system comprises a vacuumizing connector, a condensation assembly, a vacuum buffer tank, a vacuum pump and a working condition computer. A solvent concentration detection assembly is arranged at an outlet of the condensation assembly; the vacuum pump is connected to the condensation assembly through a first pipeline and a second pipeline. Wherein the first pipeline is provided with a vacuum electric proportional valve and a first electromagnetic valve, the second pipeline is provided with a second electromagnetic valve, a vacuum degree detection assembly is arranged in the containing cavity, the vacuum degree detection assembly is electrically connected to the vacuum pump, and when the solvent concentration detection assembly detects that the concentration of a solvent in the condensation assembly exceeds a preset threshold value, the vacuum degree detection assembly is started. And the vacuum pipeline system is switched from the first working state to the second working state. According to the invention, the condensation of the volatile solvent generated in the curing molding of the honeycomb core material and the control of the vacuum degree in the curing process of the honeycomb core material can be realized, and the equipment is high in operation stability, low in maintenance cost and environment-friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum equipment, and more specifically, to a vacuum pipeline system and a method for using the same. Background Art

[0002] For some honeycomb sandwich wall composite structural parts with complex surfaces, there are directional requirements for the cells when filling the honeycomb core material, and the upper and lower cross-sectional profiles of the honeycomb core material change with the surface of the part. In order to reduce the impact of the rebound deformation of the honeycomb core material during positioning, it is necessary to use a mold to cure and shape it during the honeycomb curing process. After the prepreg honeycomb core material is packaged with an isolation material, it is placed in a curing furnace with the mold, and the vacuum is evacuated and the curing process is carried out at the same time. After curing and demolding, the formed honeycomb core material is obtained.

[0003] During vacuuming, in order to prevent the honeycomb from being squeezed and deformed, the honeycomb core material needs to be cured according to a specific vacuum pressure history, that is, the corresponding vacuum pressure needs to be selected according to the curing temperature of the honeycomb core material. In the prior art, a vacuum pump is generally used to vacuum the honeycomb core material. During the curing process, the residual solvent in the pre-impregnated honeycomb will be extracted with the vacuum and accumulated in the pipeline after condensation, causing the pressure sensor to lose accuracy and thus leading to the vacuum pressure of the process out of control, reducing the service life of the pressure sensor and increasing the maintenance cost of the vacuum pipeline of the curing equipment, while causing pollution to the environment. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is that the existing honeycomb core material vacuuming equipment has a short service life and high maintenance cost.

[0006] (II) Technical solution

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides a vacuum piping system for evacuating parts in a vacuum bag, comprising a vacuum joint, a condensation component, a vacuum buffer tank, a vacuum pump and a working condition computer; the vacuum joint is used to connect to the vacuum bag; the condensation component is connected to the vacuum joint, the condensation component is used to condense a gaseous solvent into a liquid solvent, and a solvent concentration detection component is provided at the outlet of the condensation component; the vacuum buffer tank has a accommodating cavity, and the accommodating cavity is connected to the condensation component; the vacuum pump is connected to the condensation component through a first pipeline and a second pipeline respectively; the working condition computer is electrically connected to the vacuum pump; wherein the first pipeline is provided with a vacuum electrical proportional valve and a first solenoid valve, the second pipeline is provided with a second solenoid valve, and the second pipeline is sequentially connected to the condensation component, the The vacuum buffer tank and the vacuum pump, a vacuum detection component is provided in the accommodating chamber, the vacuum detection component is electrically connected to the vacuum pump, and the solvent concentration detection component is electrically connected to the first solenoid valve, the second solenoid valve, the working condition computer, the vacuum detection component and the vacuum electrical proportional valve; when the solvent concentration detection component detects that the concentration of the solvent in the condensation component exceeds a preset threshold value, the vacuum pipeline system switches from a first working state to a second working state, in the first working state, the first solenoid valve and the vacuum electrical proportional valve are opened, and the second solenoid valve and the vacuum detection component are closed, and in the second working state, the second solenoid valve and the vacuum detection component are opened, and the first solenoid valve and the vacuum electrical proportional valve are closed.

[0009] Preferably, the condensing assembly includes a water cooling device, an air cooling device and a semiconductor cooling device.

[0010] Preferably, the condensing component is a semiconductor refrigeration device, which includes a shell, a plurality of baffles and a semiconductor refrigeration plate. The shell has a condensation chamber, and the plurality of baffles are arranged at intervals and connected to the shell to divide the condensation chamber into a plurality of condensation areas. Each of the baffles is provided with a plurality of holes, and the shell is provided with the semiconductor refrigeration plate.

[0011] Preferably, the shell has an inlet end and an outlet end connected to the condensation chamber, the inlet end is connected to the vacuum interface, and the outlet end is connected to the vacuum buffer tank. The number of holes on the multiple baffles increases successively along the solvent flow direction, and the solvent flow direction points from the inlet end to the outlet end.

[0012] Preferably, the solvent concentration detection component includes a measuring pipeline, a transparent test piece, a first counter-radiating optical fiber sensor component and a second counter-radiating optical fiber sensor component, one end of the measuring pipeline is connected to the outlet of the condensation component, the other end of the measuring pipeline is connected to the accommodating cavity, the transparent test piece is arranged in the accommodating cavity, and the first counter-radiating optical fiber sensor component and the second counter-radiating optical fiber sensor component are arranged on both sides of the transparent test piece.

[0013] Preferably, the vacuum degree detection component includes a vacuum gauge, a camera and a control module, the vacuum gauge is connected to the vacuum buffer tank, the vacuum gauge is used to detect the vacuum degree of the accommodating cavity, the camera faces the vacuum gauge, and the control module is electrically connected to the camera and the vacuum pump.

[0014] Preferably, it further comprises a third pipe and a filtering device, one end of the third pipe is connected to the first pipe and the second pipe, the other end of the third pipe is connected to the vacuum pump, and the filtering device is arranged on the third pipe.

[0015] Preferably, the condensation component is provided with a first condensate discharge pipe connected to the condensation chamber, and the first condensate discharge pipe is provided with a third valve, and / or the vacuum buffer tank is provided with a second condensate discharge pipe connected to the accommodating chamber, and the second condensate discharge pipe is provided with a fourth valve.

[0016] Preferably, the vacuum buffer tank has a ventilation pipe connecting the accommodating chamber and the atmospheric environment, and the ventilation pipe is provided with a fifth solenoid valve.

[0017] In a second aspect, the present invention further provides a honeycomb core material curing and molding method, wherein the honeycomb core material is vacuumed using the vacuum pipeline system described in any one of the above technical solutions, and the honeycomb core material curing and molding method comprises the following steps:

[0018] Sealing and fixing the honeycomb core material filled with solid solvent between a vacuum bag and a forming mold to form a heat-curing forming assembly, and placing the heat-curing forming assembly into a curing furnace;

[0019] Connecting the vacuum joint to the vacuum bag, setting the corresponding relationship between the honeycomb curing vacuum degree and the honeycomb core material temperature during the honeycomb core material curing molding process on the working condition computer, and generating a temperature-vacuum degree curve;

[0020] The condensation assembly and the vacuum pump are started, the curing furnace heats and cures the honeycomb core material filled with the solid solvent, the solid solvent is heated to become a gaseous solvent, the vacuum pump evacuates the vacuum bag, and pumps the gaseous solvent into the condensation assembly, and the vacuum pipeline system operates in the first working state;

[0021] In the first working state, the first solenoid valve and the vacuum electrical proportional valve are opened, the second solenoid valve and the vacuum degree detection assembly are closed, and the working condition computer adjusts the vacuum electrical proportional valve according to the temperature-vacuum degree curve so that the honeycomb curing vacuum degree matches the corresponding honeycomb core material temperature;

[0022] When the solvent concentration detection component detects that the concentration of the solvent in the condensation component exceeds a preset threshold, the vacuum pipeline system switches from the first working state to the second working state. In the second working state, the two solenoid valves and the vacuum degree detection component are turned on, the first solenoid valve and the vacuum electrical proportional valve are turned off, and the working condition computer adjusts the vacuum pump according to the temperature-vacuum degree curve to match the honeycomb curing vacuum degree with the corresponding honeycomb core material temperature.

[0023] When the solvent concentration detection component detects that the concentration of the solvent in the condensation component is not greater than a preset threshold, the vacuum pipeline system switches from the second working state to the first working state;

[0024] After the honeycomb core material is cured and formed, it is demoulded to obtain a honeycomb core material with a preset shape.

[0025] (III) Beneficial effects

[0026] The above technical solution of the present invention has at least the following advantages:

[0027] 1. In the present invention, the vacuum pipeline system provided by the present invention can realize the condensation of gaseous solvents during the vacuuming process, and can separate the solvent condensation to avoid the solvent condensing and accumulating in the pipeline, affecting the normal operation of other components, and can increase the service life of the equipment and reduce the maintenance cost of the equipment; at the same time, it avoids the discharge of gaseous solvents into the atmosphere, which is environmentally friendly.

[0028] 2. In the present invention, the vacuum pressure of the whole process of honeycomb curing is controlled by parallel control of a vacuum electrical proportional valve and a vacuum detection component for realizing vacuum control based on visual recognition technology. When the volatile solvent affects the pipeline conduction and vacuum sensor measurement of the vacuum pipeline system, it can be switched to the second working state to protect the vacuum electrical proportional valve and improve the reliability of the operation of the vacuum pipeline. The solvent concentration in the condensation component can be detected by the solvent concentration detection component. When it is detected that the concentration of the solvent in the condensation component exceeds the preset threshold, the vacuum pipeline system is switched from the first working state to the second working state, and the vacuum degree is switched from the vacuum electrical proportional valve to the vacuum degree detection component through visual recognition technology to control the vacuum degree, so as to avoid the vacuum electrical proportional valve from being corroded and damaged by working in a high concentration solvent environment for a long time.

[0029] 3. In the present invention, the vacuum pipeline system provided by the present invention can be designed as a movable integrated structure. When it is needed, the device only needs to be moved to a designated position and connected to a curing furnace. There is no need to modify the existing curing furnace, and it is easy to use.

[0030] 4. In the present invention, the curing vacuum at the corresponding honeycomb core material curing temperature can be adjusted according to the preset temperature-vacuum curve to avoid deformation of the honeycomb core material caused by squeezing the honeycomb core material due to excessive vacuum, thereby improving the molding quality of the honeycomb core material.

[0031] 5. In the present invention, it is preferred to use a semiconductor refrigeration device to condense the gaseous solvent. Compared with an air cooling mechanism or a water cooling mechanism, it has a high space utilization rate, is convenient for modular integrated design, and is conducive to reducing the overall volume of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the implementation principle of the vacuum pipeline system provided in an embodiment of the present invention for curing and molding honeycomb core materials.

[0034] Figure 2 Schematic diagram of the structure of the vacuum pipeline system provided by the embodiment of the present invention.

[0035] Figure 3 It is a schematic diagram of the structure of a condensation component provided in an embodiment of the present invention.

[0036] The reference numerals in the figures are:

[0037] 100, vacuum piping system; 110, vacuum piping; 120, insulation layer; 200, honeycomb core material; 300, vacuum bag; 400, curing furnace; 500, forming mold; 1, vacuum joint; 2, condensation component; 3, vacuum buffer tank; 4, vacuum pump; 5, working condition computer; 6, solvent concentration detection component; 7, vacuum electrical proportional valve; 9, vacuum degree detection component; 10, filtering device; 11, joint solenoid valve; 21, shell; 22, baffle; 23, first condensate discharge pipeline; 211, condensation chamber; 212, condensation area; 213, inlet end; 214, outlet end; 221, hole; 31, accommodating chamber; 32, second condensate discharge pipe; 33, ventilation pipe; 41, first pipe; 42, second pipe; 43, third pipe; 61, measuring pipeline; 62, transparent test piece; 63, first counter-radiation optical fiber sensor assembly; 64, second counter-radiation optical fiber sensor assembly; 65 optical fiber amplifier; 81, first solenoid valve; 82, second solenoid valve; 83, third valve; 84, fourth valve; 85, fifth solenoid valve; 86, sixth solenoid valve; 91, vacuum gauge; 92, camera; 93, control module. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention, and do not indicate that a device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments:

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a vacuum piping system 100 for evacuating parts in a vacuum bag 300, including a vacuum joint 1, a condensation component 2, a vacuum buffer tank 3, a vacuum pump 4 and a working condition computer 5; the vacuum joint 1 is used to connect with the vacuum bag; the condensation component 2 is connected to the vacuum joint 1, and a joint solenoid valve 11 is provided on the vacuum joint 1. The condensation component 2 is used to condense a gaseous solvent into a liquid solvent, and a solvent concentration detection component 6 is provided at the outlet of the condensation component 2; the vacuum buffer tank 3 has a accommodating chamber 31, and the accommodating chamber 31 is connected to the condensation component 2; the vacuum pump 4 is connected to the condensation component 2 through a first pipe 41 and a second pipe 42 respectively; the working condition computer 5 is electrically connected to the vacuum pump 4; wherein the first pipe 41 is provided with a vacuum electrical proportional valve 7 and a first solenoid valve 81, and the second pipe 42 is provided with a There is a second solenoid valve 82, the second pipeline 42 is connected to the condensation component 2, the vacuum buffer tank 3 and the vacuum pump 4 in sequence, a vacuum detection component 9 is provided in the accommodating chamber 31, the vacuum detection component 9 is electrically connected to the vacuum pump 4, and the solvent concentration detection component 6 is electrically connected to the first solenoid valve 81, the second solenoid valve 82, the working condition computer 5, the vacuum detection component 9 and the vacuum electrical proportional valve 7; when the solvent concentration detection component 6 detects that the concentration of the solvent in the condensation component 2 exceeds the preset threshold, the vacuum pipeline system switches from the first working state to the second working state. In the first working state, the first solenoid valve 81 and the vacuum electrical proportional valve 7 are opened, and the second solenoid valve 82 and the vacuum detection component 9 are closed. In the second working state, the second solenoid valve 82 and the vacuum detection component 9 are opened, and the first solenoid valve 81 and the vacuum electrical proportional valve 7 are closed. Specifically, in this embodiment, the vacuum pump 4 is preferably an oil-free vacuum pump. Specifically, the condensation component 2 provided in this embodiment is connected to the vacuum pump 4 through the first pipe 41 and the second pipe 42 respectively, and both pipes can realize the vacuum operation. When the structure on one of the pipes fails, the structure on the other pipe can ensure that the equipment can normally control the vacuum degree, thereby ensuring that the equipment can always operate stably and avoid production losses caused by equipment failure. At the same time, since the purchase cost of the vacuum electrical proportional valve 7 is relatively high, when the solvent concentration in the condensation component 2 is high, the vacuum degree detection component 9 is switched to operate to realize the control of the vacuum degree, so as to avoid damage to the vacuum electrical proportional valve 7 when operating in an environment with high solvent concentration, thereby further reducing the probability of equipment failure and reducing the cost required for equipment maintenance.

[0043] Preferably, the condensation assembly 2 includes a water cooling device, an air cooling device and a semiconductor cooling device. Specifically, the water cooling device can cool the gaseous solvent by heat exchange between cold water and the gaseous solvent, and condense the gaseous solvent into a liquid solvent; the air cooling device can cool the gaseous solvent by heat exchange between cold air and the gaseous solvent, and condense the gaseous solvent into a liquid solvent.

[0044] Preferably, the condensation assembly is a semiconductor refrigeration device, which includes a shell 21, a plurality of baffles 22, and a semiconductor cooling sheet (not shown). The shell 21 has a condensation chamber 211, and a plurality of baffles 22 are arranged at intervals and connected to the shell 21 to divide the condensation chamber 211 into a plurality of condensation areas 212. Each baffle 22 is provided with a plurality of holes 221. The shell 21 is provided with a semiconductor cooling sheet. By arranging the semiconductor cooling sheet on the outer wall of the shell, the heat of the baffle 22 is taken away by heat conduction. Specifically, the plurality of baffles 22 are arranged in parallel in the condensation chamber 11. When the vacuum pump is working, the gaseous solvent is drawn in from the vacuum joint, and the gaseous solvent enters the condensation chamber 212. The semiconductor cooling sheet on the shell 21 cools the gaseous solvent, and passes through the holes on the baffle 22 to enter the next condensation area. Each condensation area cools the gaseous solvent in turn, so that the gaseous solvent is condensed into a liquid solvent.

[0045] Preferably, the shell 21 has an inlet end 213 and an outlet end 214 connected to the condensation chamber 211, the inlet end 213 is connected to the vacuum port 1, the outlet end 214 is connected to the vacuum buffer tank 3, and the number of holes 221 on the multiple baffles 22 increases in sequence along the solvent flow direction, and the solvent flow direction points from the inlet end 213 to the outlet end 214. Specifically, the gaseous solvent enters the condensation chamber 212 from the inlet end 213, passes through the holes 221 on the multiple baffles 22 in sequence, and is cooled by the semiconductor cooling sheet on the shell 21, so that the gaseous solvent is condensed into a liquid solvent, and finally the liquid solvent flows out from the outlet end. More specifically, the inlet end 213 and the outlet end 214 are arranged diagonally, and the holes 221 on the multiple baffles 22 are distributed in a stepped manner as shown in 3, that is, the closer to the outlet end 214, the more holes 221 on the baffles 22.

[0046] Preferably, the solvent concentration detection component 6 includes a measuring pipeline 61, a transparent test piece 62, a first optical fiber sensor component 63 and a second optical fiber sensor component 64. One end of the measuring pipeline 61 is connected to the outlet of the condensation component 2, and the other end of the measuring pipeline 61 is connected to the accommodating chamber 31. The transparent test piece 62 is arranged in the accommodating chamber 31. The first optical fiber sensor component 63 and the second optical fiber sensor component 64 are arranged on both sides of the transparent test piece 62. Specifically, when the solvent in the condensation chamber 211 reaches a certain concentration, the volatilized solvent will be adsorbed on the surface of the transparent test piece 62, so that the surface of the transparent test piece 62 is fogged and blurred, and then the laser beam emitted by the first optical fiber sensor component 63 cannot pass through the second optical fiber sensor component 64, and the signal of the solvent concentration detection component 6 is in an interrupted state; on the contrary, when the concentration of the solvent in the condensation chamber 211 is lower than the preset threshold, the laser beam emitted by the first optical fiber sensor component 63 can pass through the transparent test piece 62 and be received by the second optical fiber sensor component, and the signal of the solvent concentration detection component 6 is in a connected state.

[0047] Preferably, the vacuum degree detection component 9 includes a vacuum gauge 91, a camera 92 and a control module 93. The vacuum gauge 91 is connected to the vacuum buffer tank 3. The vacuum gauge 91 is used to detect the vacuum degree of the accommodating chamber 31. The camera 92 faces the vacuum gauge 91. The control module 93 is electrically connected to the camera 92 and the vacuum pump 4. Specifically, the vacuum gauge can detect the vacuum degree of the accommodating chamber 31 and display the vacuum degree value on the dial. The camera 92 is facing the dial of the vacuum gauge 91 and can take real-time photos of the value corresponding to the pointer on the dial of the vacuum gauge 91. The control module 93 has a corresponding visual recognition algorithm built in it, and the vacuum degree value on the photo taken by the camera 92 can be recognized by the visual recognition algorithm. The specific process is as follows: First, the camera 92 takes a photo of the vacuum gauge 91, and the vacuum value Pt at the pointer position of the vacuum gauge is identified through the visual recognition algorithm in the control module 93, and the difference △P between Pt and the set vacuum degree Ps at the current honeycomb curing temperature is calculated. The PID module in the control module 93 controls the second solenoid valve 82 to evacuate or the fifth solenoid valve 85 to connect to the atmosphere to adjust Pt to Ps. The second solenoid valve 82 and the fifth solenoid valve 85 are always in an open-closed state or a fully closed state, and the temperature rise curing process continues. If the laser beam pass rate in the measuring pipeline 61 is greater than the set threshold, the vacuum pipeline system switches from the first working state to the second working state, and the vacuum pipeline system controls the vacuum degree through the vacuum electrical proportional valve 7. Further, in this embodiment, the control module 93 is preferably a programmable logic controller. It should be noted that in this embodiment, the specific visual recognition algorithm is a prior art well known to those skilled in the art, and its principle and specific algorithm content will not be repeated in this embodiment.

[0048] Preferably, the filter 10 further comprises a third pipe 43, one end of the third pipe 43 is connected to the first pipe 41 and the second pipe 42, the other end of the third pipe 43 is connected to the vacuum pump 4, and the filter 10 is arranged on the third pipe 43. Specifically, a filter material is placed in the filter 10, and in this embodiment, the filter material is preferably activated carbon.

[0049] Preferably, the condensation assembly 2 is provided with a first condensate discharge pipe 23 connected to the condensation chamber 211, and a third valve 83 is provided on the first condensate discharge pipe 23; the vacuum buffer tank 3 is provided with a second condensate discharge pipe 32 connected to the accommodating chamber 31, and the second condensate discharge pipe 32 is provided with a fourth valve 84.

[0050] Preferably, the vacuum buffer tank 3 has a ventilation pipe 33 connecting the accommodating chamber 31 and the atmospheric environment, and the ventilation pipe 33 is provided with a fifth solenoid valve 85 .

[0051] Furthermore, the first pipeline 41 is connected to the vacuum buffer tank 3 through a fourth pipeline, and a sixth solenoid valve 86 is provided on the fourth pipeline.

[0052] The present invention also provides a honeycomb core material curing and molding method, wherein the honeycomb core material is vacuumed using any vacuum pipeline system in the embodiments, and the honeycomb core material curing and molding method comprises the following steps:

[0053] The honeycomb core material 200 filled with solid solvent is sealed and fixed between the vacuum bag 300 and the forming mold 500 to form a heat-cured forming assembly, and the heat-cured forming assembly is placed in a curing furnace 400;

[0054] The vacuum joint 1 is connected to the vacuum bag, and the corresponding relationship between the honeycomb curing vacuum degree and the honeycomb core material temperature during the honeycomb core material curing and molding process is set on the working condition computer to generate a temperature-vacuum degree curve; specifically, the vacuum interface and the vacuum bag are connected through the vacuum pipeline 110, and the outer peripheral side of the vacuum pipeline arranged outside the curing furnace 400 is wrapped with an insulation layer 120, and the insulation layer 120 is prepared and formed by an insulation material with good insulation performance. If the temperature of the vacuum pipeline inside the curing furnace 400 is relatively high, it is not necessary to set an insulation layer. For the vacuum pipeline arranged outside the curing furnace 400, an insulation layer needs to be set to prevent the gaseous solvent in the vacuum pipeline from exchanging heat with the external environment at a lower temperature, condensing into a liquid solvent and accumulating in the vacuum pipeline, thereby blocking the vacuum pipeline.

[0055] The condensation assembly 2 and the vacuum pump 4 are started, and the curing furnace 400 heats and cures the honeycomb core material filled with the solid solvent. The solid solvent is heated to become a gaseous solvent. The vacuum pump 4 evacuates the vacuum bag and pumps the gaseous solvent into the condensation assembly 2. The vacuum pipeline system operates in the first working state.

[0056] In the first working state, the first solenoid valve 81 and the vacuum electrical proportional valve 7 are opened, the second solenoid valve 82 and the vacuum detection component 9 are closed, and the working condition computer 5 adjusts the vacuum electrical proportional valve 7 according to the temperature-vacuum curve to match the honeycomb curing vacuum with the corresponding honeycomb core material temperature; further, in the temperature-vacuum curve, for the vacuum between two temperature points, the corresponding temperature is processed using a linear interpolation correspondence relationship.

[0057] When the solvent concentration detection component detects that the concentration of the solvent in the condensation component exceeds the preset threshold, the vacuum pipeline system switches from the first working state to the second working state. In the second working state, the second solenoid valve 82 and the vacuum detection component 9 are opened, the first solenoid valve 81 and the vacuum electrical proportional valve 7 are closed, and the working condition computer 5 adjusts the vacuum pump 4 according to the temperature-vacuum curve to match the honeycomb curing vacuum degree with the corresponding honeycomb core material temperature;

[0058] When the solvent concentration detection component 6 detects that the concentration of the solvent in the condensation component 2 is not greater than the preset threshold, the vacuum pipeline system switches from the second working state to the first working state;

[0059] After the honeycomb core material 200 is cured and formed, it is demoulded to obtain the honeycomb core material 200 having a preset shape. Specifically, the preset shape is determined by the profile of the forming mold 500.

[0060] The following is provided for this application Figures 1 to 3 A specific embodiment shown:

[0061] First, the prepreg honeycomb core material is packaged with auxiliary materials (including isolation materials, air guide materials and vacuum bags, etc.) on the forming mold 500 and then placed in the curing furnace 400. The vacuum pipeline 110 led out of the forming mold 500 is connected to the vacuum pipeline system. The vacuum pipeline 110 outside the curing furnace 400 is coated with a thermal insulation layer 120.

[0062] Then, the vacuum pipeline system is started, and the corresponding relationship between the honeycomb curing vacuum degree and the honeycomb core material temperature during the process is set in the industrial control computer 5, and a temperature-vacuum degree curve is generated. For the vacuum degree between two temperature points, the corresponding temperature is processed using a linear interpolation corresponding relationship;

[0063] Next, the condensation component 2 uses a thermocouple electrically connected to the control module 93 to control the condensation temperature to a set value; the vacuum pump 4 is started, the first vacuum pipeline is opened to evacuate the honeycomb core material, the second solenoid valve 82, the fifth solenoid valve 85, and the sixth solenoid valve 86 are closed, the first solenoid valve 81, and the solenoid valve and vacuum electrical proportional valve 7 on the vacuum joint 1 are opened, and the curing furnace 400 starts to heat up to execute the curing process. The industrial control computer 5 and the control module 93 read the thermocouple value connected to the honeycomb core material, and the vacuum bag pressure is set to be constant at -0.05Mpa during the curing process, and the curing temperature of the honeycomb core material is set to 180°C. During the honeycomb curing process, the first and second optical fiber sensor components 63 and 64 in the measuring pipeline 61 are used to detect the transmittance of the transparent test piece 62. The laser passes through the optical fiber amplifier 65 and is emitted from the first optical fiber sensor component 63. The laser passes through the transparent test piece 62 and is received by the second optical fiber sensor component 64. If the laser beam pass rate is less than the set threshold, the vacuum pipeline system switches from the first working state to the second working state, and the vacuum degree is controlled by the vacuum degree detection component. The first solenoid valve 81 and the vacuum electrical proportional valve 7 are closed, and the second solenoid valve 82 and the sixth solenoid valve 86 are opened. The dial image of the vacuum meter 91 collected by the camera 92 is used to identify the vacuum degree value at the pointer position of the machine vacuum meter 91 through the image processing software of the industrial control computer 5. The second solenoid valve 82 is opened to evacuate or the fifth solenoid valve 85 is opened to connect to the atmosphere through the PID module in the control module 93 at a frequency of 0.25s. The second solenoid valve 82 and the fifth solenoid valve 85 are always in an open-closed state or a fully closed state. If the laser beam passing rate in the measuring pipeline section 61 is greater than the set threshold, the vacuum pipeline system switches from the second working state to the first working state, and the vacuum degree is controlled by the vacuum electrical proportional valve 7 .

[0064] After the curing process and the cooling process are completed, the vacuum pipeline system is separated from the molding mold 500, the vacuum pipeline system is closed, and the third valve 83 on the first condensate discharge pipeline 23 and the fourth valve 84 on the second condensate discharge pipeline 32 are opened to discharge and collect the liquid solvent in the curing process. Finally, the auxiliary materials on the honeycomb core material 200 are removed, and the honeycomb core material 200 with a preset shape is obtained by demolding.

[0065] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum pipeline system, characterized in that: Used to evacuate parts in vacuum bags, including: A vacuum joint, used for connecting with the vacuum bag; A condensation component connected to the vacuum joint, the condensation component is used to condense the gaseous solvent into a liquid solvent, and a solvent concentration detection component is provided at the outlet of the condensation component; A vacuum buffer tank having a containing cavity, wherein the containing cavity is connected to the condensing assembly; A vacuum pump connected to the condensation assembly through a first pipeline and a second pipeline respectively; A working condition computer, electrically connected to the vacuum pump; Among them, the first pipeline is provided with a vacuum electrical proportional valve and a first solenoid valve, the second pipeline is provided with a second solenoid valve, the second pipeline is connected to the condensation component, the vacuum buffer tank and the vacuum pump in sequence, a vacuum detection component is provided in the accommodating chamber, the vacuum detection component is electrically connected to the vacuum pump, and the solvent concentration detection component is electrically connected to the first solenoid valve, the second solenoid valve, the working condition computer, the vacuum detection component and the vacuum electrical proportional valve; when the solvent concentration detection component detects that the concentration of the solvent in the condensation component exceeds a preset threshold, the vacuum pipeline system switches from the first working state to the second working state, in the first working state, the first solenoid valve and the vacuum electrical proportional valve are opened, and the second solenoid valve and the vacuum detection component are closed, and in the second working state, the second solenoid valve and the vacuum detection component are opened, and the first solenoid valve and the vacuum electrical proportional valve are closed.

2. The vacuum pipeline system according to claim 1, characterized in that: The condensing assembly includes a water cooling device, an air cooling device and a semiconductor cooling device.

3. The vacuum pipeline system according to claim 1, characterized in that: The condensing component is a semiconductor refrigeration device, which includes a shell, multiple baffles and a semiconductor refrigeration plate. The shell has a condensation chamber. The multiple baffles are arranged at intervals and connected to the shell to divide the condensation chamber into multiple condensation areas. Each baffle is provided with multiple holes, and the shell is provided with the semiconductor refrigeration plate.

4. The vacuum pipeline system according to claim 3, characterized in that: The shell has an inlet end and an outlet end connected to the condensation chamber, the inlet end is connected to the vacuum port, and the outlet end is connected to the vacuum buffer tank. The number of holes on the baffles increases along the solvent flow direction, and the solvent flow direction points from the inlet end to the outlet end.

5. The vacuum pipeline system according to claim 1, characterized in that: The solvent concentration detection component includes a measuring pipeline, a transparent test piece, a first counter-radiating optical fiber sensor component and a second counter-radiating optical fiber sensor component; one end of the measuring pipeline is connected to the outlet of the condensation component, and the other end of the measuring pipeline is connected to the accommodating cavity, the transparent test piece is arranged in the accommodating cavity, and the first counter-radiating optical fiber sensor component and the second counter-radiating optical fiber sensor component are arranged on both sides of the transparent test piece.

6. The vacuum pipeline system according to claim 1, characterized in that: The vacuum degree detection component includes a vacuum gauge, a camera and a control module. The vacuum gauge is connected to the vacuum buffer tank and is used to detect the vacuum degree of the accommodating cavity. The camera faces the vacuum gauge, and the control module is electrically connected to the camera and the vacuum pump.

7. The vacuum pipeline system according to claim 1, characterized in that: It also includes a third pipeline and a filtering device, one end of the third pipeline is connected to the first pipeline and the second pipeline, the other end of the third pipeline is connected to the vacuum pump, and the filtering device is arranged on the third pipeline.

8. The vacuum pipeline system according to claim 1, characterized in that: The condensation component is provided with a first condensate discharge pipe connected to the condensation chamber, and the first condensate discharge pipe is provided with a third valve, and / or the vacuum buffer tank is provided with a second condensate discharge pipe connected to the accommodating chamber, and the second condensate discharge pipe is provided with a fourth valve.

9. The vacuum pipeline system according to claim 1, characterized in that: The vacuum buffer tank has a ventilation pipeline connecting the accommodating chamber and the atmospheric environment, and the ventilation pipeline is provided with a fifth solenoid valve.

10. A method for curing and molding a honeycomb core material, comprising: vacuumizing the honeycomb core material using the vacuum pipeline system according to any one of claims 1 to 9, wherein: The honeycomb core material curing molding method comprises the following steps: Sealing and fixing the honeycomb core material filled with solid solvent between a vacuum bag and a forming mold to form a heat-curing forming assembly, and placing the heat-curing forming assembly into a curing furnace; Connecting the vacuum joint to the vacuum bag, setting the corresponding relationship between the honeycomb curing vacuum degree and the honeycomb core material temperature during the honeycomb core material curing molding process on the working condition computer, and generating a temperature-vacuum degree curve; The condensation assembly and the vacuum pump are started, the curing furnace heats and cures the honeycomb core material filled with liquid solvent, the solid solvent is heated to become gaseous solvent, the vacuum pump evacuates the vacuum bag and pumps the gaseous solvent into the condensation assembly, and the vacuum pipeline system operates in the first working state; In the first working state, the first solenoid valve and the vacuum electrical proportional valve are opened, the second solenoid valve and the vacuum degree detection assembly are closed, and the working condition computer adjusts the vacuum electrical proportional valve according to the temperature-vacuum degree curve so that the honeycomb curing vacuum degree matches the corresponding honeycomb core material temperature; When the solvent concentration detection component detects that the concentration of the solvent in the condensation component exceeds a preset threshold, the vacuum pipeline system switches from the first working state to the second working state. In the second working state, the two solenoid valves and the vacuum degree detection component are turned on, the first solenoid valve and the vacuum electrical proportional valve are turned off, and the working condition computer adjusts the vacuum pump according to the temperature-vacuum degree curve to match the honeycomb curing vacuum degree with the corresponding honeycomb core material temperature. When the solvent concentration detection component detects that the concentration of the solvent in the condensation component is not greater than a preset threshold, the vacuum pipeline system switches from the second working state to the first working state; After the honeycomb core material is cured and formed, it is demoulded to obtain a honeycomb core material with a preset shape.

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