Vacuum heating and degassing pretreatment device and method

Abstract

The application provides a vacuum heating and degassing pretreatment device and method, and relates to the field of thermal insulation materials. The vacuum heating and degassing pretreatment device comprises: a degassing container, a vacuum degassing port and a material filling port are arranged on the degassing container and communicate with the inside of the degassing container; a heating device is arranged in the degassing container; a heating power supply is electrically connected with the heating device; and a vacuum pumping assembly at least has a vacuum gauge arranged on the outer sidewall of the degassing container and a vacuum unit arranged outside the degassing container; the vacuum unit is electrically connected with a vacuum controller, and the vacuum controller is signal connected with the vacuum gauge; wherein the vacuum controller can control the opening and closing of the vacuum unit according to the vacuum degree signal fed back by the vacuum gauge, so that a stable vacuum degree can be maintained in the degassing container; the application can improve the degassing effect of the pretreatment process and improve the processing speed and efficiency of the low-temperature vacuum equipment vacuum pumping process.

Description

Technical Field

[0001] This invention relates to the field of thermal insulation materials, specifically to a vacuum heating degassing pretreatment device and method. Background Technology

[0002] With the rapid development of the cryogenic insulation storage and transportation industry, research on various factors affecting the cryogenic insulation storage and transportation process is also flourishing. Currently, cryogenic insulation technologies mainly include: stacked insulation, vacuum powder (fiber) insulation, high-vacuum multilayer insulation, and high-vacuum multi-screen insulation. Among these, vacuum multilayer insulation has gained particular favor due to its excellent insulation performance and simple process. It has wide applications in small cryogenic insulation containers and cryogenic tank trucks, and its application areas are showing a trend of further expansion.

[0003] Among the many factors that affect the performance of multilayer insulation, the vacuum level of the vacuum multilayer insulation material used in high-vacuum multilayer insulation plays a crucial role.

[0004] In existing technologies, the pretreatment of vacuum multilayer insulation materials typically involves high-temperature baking to desorb as much of the adsorbed gas as possible and more quickly, thereby reducing the outgassing rate and enabling the vacuum multilayer insulation material to achieve a high vacuum level during evacuation in cryogenic vacuum equipment, which can then be maintained for a longer period. However, existing high-temperature baking methods are not thorough pretreatment methods for vacuum multilayer insulation materials, leaving a significant amount of residual gas that affects subsequent evacuation in cryogenic vacuum equipment. This results in a high-cost, low-efficiency, and slow evacuation process for vacuum multilayer insulation materials. Summary of the Invention

[0005] This invention addresses the problem that existing high-temperature baking and other methods for pre-treating vacuum multilayer insulation materials are incomplete, leaving behind a significant amount of residual gas that affects subsequent low-temperature vacuum equipment evacuation. This results in high costs, low efficiency, and slow speed in the vacuum evacuation process for vacuum multilayer insulation materials. The invention provides a vacuum heating degassing pre-treatment device and method that can improve the degassing effect of the pre-treatment process, thereby improving the subsequent low-temperature vacuum equipment evacuation process for vacuum multilayer insulation materials.

[0006] The technical solution adopted in this invention is:

[0007] A vacuum heating degassing pretreatment device, comprising:

[0008] A degassing container is provided with a vacuum extraction port and a material filling port communicating with its interior; and a heating device is provided inside the degassing container.

[0009] A heating power supply is electrically connected to the heating device; and

[0010] The vacuum assembly includes at least a vacuum gauge disposed on the outer wall of the degassing container and a vacuum unit disposed outside the degassing container; the vacuum unit is electrically connected to a vacuum controller, and the vacuum controller is signal-connected to the vacuum gauge.

[0011] The vacuum controller can control the opening and closing of the vacuum unit based on the vacuum degree signal fed back by the vacuum gauge, so that the vacuum container can maintain a stable vacuum degree, thereby increasing the amount of gas removed by the heating equipment heating the vacuum multilayer insulation material in the degassing container.

[0012] Furthermore, the material filling port is located at the top of the degassing container; a sealing cap is detachably provided on the material filling port, and the vacuum extraction port is located on the sealing cap.

[0013] Furthermore, the heating power supply is electrically connected to a power controller, which can adjust the current input from the heating power supply to the heating device.

[0014] Furthermore, it also includes: a temperature detection component; the temperature detection component has at least a temperature transmitter, the temperature transmitter is electrically connected to a temperature controller, and the temperature controller is signal-connected to the power controller; the temperature controller can adjust the current input of the heating power supply to the heating device according to the temperature signal inside the degassing container fed back by the temperature detection component.

[0015] Furthermore, the degassing container has at least an outer cylinder and an inner cylinder, with the inner cylinder rotatably disposed inside the outer cylinder; the material filling port includes a plurality of second material filling ports disposed on the outer cylinder and a plurality of third material filling ports disposed on the inner cylinder, the second material filling ports and the third material filling ports being adapted to each other; and the vacuum extraction port is disposed on the outer cylinder, and the inner cylinder is provided with a vacuum communication port adapted to the vacuum extraction port; wherein, when the vacuum extraction port and the vacuum communication port are aligned, the second material filling ports and the third material filling ports are misaligned with each other, so that the interior of the degassing container is sealed.

[0016] Furthermore, the bottom of the outer cylinder is provided with an annular groove; the outer side wall of the inner cylinder is provided with a flange, and a convex ring is provided on the flange. The convex ring is slidably embedded in the annular groove, so that the outer cylinder and the inner cylinder can rotate relative to each other.

[0017] Furthermore, a control box is provided below the outer cylinder; a worm gear is provided at the bottom of the inner cylinder, and the worm gear extends into the control box; a worm is provided inside the control box, and the worm meshes with the worm gear; a handwheel is provided at the end of the worm that extends out of the control box.

[0018] A vacuum heating degassing pretreatment method, using the vacuum heating degassing pretreatment device described above, includes the following steps:

[0019] S10. The multi-layer insulation material is loaded into the degassing container through the material filling port, and the material filling port is sealed.

[0020] S20. Set the vacuum level, start the heating power supply, and use the heating device to heat the multi-layer insulation material to release the gas;

[0021] S30. Detect the real-time vacuum level inside the degassing container, and control the start-up and shutdown of the vacuum unit based on the difference between the real-time vacuum level and the set vacuum level.

[0022] Furthermore, step S20 also includes: setting the heating temperature;

[0023] The vacuum heating degassing pretreatment method further includes:

[0024] S40. Detect the real-time heating temperature inside the degassing container, determine the difference between the real-time heating temperature and the set heating temperature, and control the current input of the heating power supply to the heating device according to the difference between the real-time heating temperature and the set heating temperature, so as to adjust the real-time heating temperature inside the degassing container.

[0025] There is no fixed execution order for steps S30 and S40.

[0026] Furthermore, step S30 further includes: when the real-time vacuum level is lower than the set vacuum level, the vacuum controller controls the vacuum unit to start; when the real-time vacuum level reaches the set vacuum level, the vacuum controller controls the vacuum unit to shut down.

[0027] The beneficial effects of this invention are:

[0028] 1. The pretreatment device of the present invention heats the insulation material by electrically connecting a heating power supply to a heating device inside the degassing container, allowing the insulation material to be fully degassed. Then, a vacuum pumping component is used to pump air from the sealed space inside the degassing container to increase the vacuum level, so that the gas released from the insulation material interlayer can be fully removed, reducing the amount of gas remaining in the interlayer. This solves the problem that the pretreatment of vacuum multilayer insulation materials by high-temperature baking and other methods in the prior art is incomplete, and a lot of gas remains, which affects the subsequent low-temperature vacuum pumping, resulting in high cost, low efficiency and slow speed of vacuum multilayer insulation material evacuation process.

[0029] 2. The pretreatment device of the present invention also sets up a temperature detection component, and uses a temperature transmitter and a temperature controller to adjust the operation of the heating power supply and the heating tube to control the temperature in the degassing container within a set range. On the one hand, this prevents the heating temperature in the degassing container from being too low, which would lead to insufficient gas release; on the other hand, it also avoids the heating temperature in the degassing container from being too high, which would damage and affect the performance of some materials in the multilayer composite material, thus ensuring the service life and stability of the pretreated multilayer composite material.

[0030] 3. The pretreatment method of the present invention heats the insulation material by connecting a heating power supply to a heating device inside the degassing container, allowing the insulation material to be fully degassed. Then, a vacuum pumping assembly is used to evacuate the sealed space inside the degassing container to increase the vacuum level, so that the gas released from the insulation material interlayer can be fully removed, reducing the amount of gas remaining in the interlayer. By detecting and controlling the vacuum level inside the container, the vacuum level inside the container is kept stable. This solves the problem that the pretreatment of vacuum multilayer insulation materials by high-temperature baking and other methods in the prior art is incomplete, and a lot of gas remains, which affects the subsequent low-temperature vacuum equipment vacuuming, resulting in high cost, low efficiency and slow speed of vacuum multilayer insulation material evacuation process.

[0031] 4. The pretreatment device of the present invention further utilizes an inner cylinder and an outer cylinder that can rotate relative to each other. Layered filling of the insulation material is achieved by aligning several third material filling ports on the inner cylinder with several second material filling ports on the outer cylinder. After layered filling, uniform heating is achieved using multi-layered shelves equipped with internal heating devices. The misalignment of the third and second material filling ports completes the sealing of the degassing container. Simultaneously, when the third and second material filling ports are misaligned, the vacuum connection port on the inner cylinder connects with the vacuum extraction port on the outer cylinder, providing a vacuum pipeline for the vacuum extraction assembly required for vacuuming. This solves the problem in the above embodiments where uniform heating of all parts of the vacuum multilayer insulation material is not achieved, resulting in uneven degassing effects, potential differences in insulation performance, and possible deformation of the multilayer structure within the material. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the pretreatment device according to Embodiment 1 of the present invention;

[0034] Figure 2 This is a flowchart of the preprocessing method according to Embodiment 2 of the present invention;

[0035] Figure 3 This is a three-dimensional structural schematic diagram of the degassing container of Embodiment 3 of the present invention;

[0036] Figure 4 This is a three-dimensional structural diagram of the inner cylinder of Embodiment 3 of the present invention;

[0037] Figure 5 This is a top view of the shelf in Embodiment 3 of the present invention;

[0038] Figure 6 This is a bottom view of the outer cylinder of Embodiment 3 of the present invention;

[0039] Figure 7 This is a bottom view of the control box in Embodiment 3 of the present invention.

[0040] Reference numerals: 100-Degassing container, 101-First material filling port, 102-First vacuum measurement interface, 110-Sealing cover, 111-Vacuum extraction port, 120-Heating tube, 130-Inner cylinder, 131-Third material filling port, 132-Protruding ring, 133-Shelf, 134-Ventilation hole, 135-Vacuum connection port, 136-Flange, 137-Worm gear, 138-Third vacuum measurement interface, 139-Second temperature measurement interface, 140-Outer cylinder, 141-Second material filling port, 142-Annular groove, 148-Second vacuum measurement interface, 149-First temperature measurement interface, 150-Control box, 151-Worm gear, 152-Handwheel, 153-Control panel;

[0041] 200 - Heating power supply, 210 - Power controller;

[0042] 300 - Temperature detection assembly; 310 - Temperature transmitter; 312 - Measuring terminal; 320 - Temperature controller;

[0043] 400 - Vacuum assembly, 410 - Vacuum gauge, 420 - Vacuum unit, 430 - Vacuum controller. Detailed Implementation

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention.

[0046] The embodiments of the invention will now be described in detail with reference to the accompanying drawings.

[0047] Example 1

[0048] Existing vacuum multilayer insulation materials typically require pretreatment before evacuation in cryogenic vacuum equipment. This pretreatment usually involves high-temperature baking to increase the amount of gas adsorbed within the material and facilitate faster desorption, thus reducing the outgassing rate during evacuation and enabling the material to achieve and maintain a high vacuum level for an extended period. However, existing high-temperature baking methods are insufficient for effectively removing gas from the interlayer of the vacuum multilayer insulation material. Only a portion of the gas escapes at high temperatures, leaving a significant amount remaining inside the insulation. This negatively impacts the subsequent evacuation process, reducing efficiency and speed, extending operating time, and increasing costs.

[0049] To address the aforementioned problems in the prior art, this embodiment provides a vacuum heating degassing pretreatment device. This device is used to pretreat vacuum multilayer insulation materials before evacuation in a cryogenic vacuum equipment. This vacuum heating degassing pretreatment device can improve the degassing effect of the pretreatment process, thereby improving the processing speed and efficiency of the subsequent evacuation process for vacuum multilayer insulation materials in the cryogenic vacuum equipment. Please refer to... Figure 1 The vacuum heating degassing pretreatment device mainly includes: a degassing container 100, a heating power supply 200, a temperature detection component 300, and a vacuum pumping component 400 outside the degassing container 100.

[0050] The degassing container 100 is used to fill with vacuum multilayer insulation material for treatment, while simultaneously separating the internal space from the external space to form a sealed internal space. For example... Figure 1 As shown, the degassing container 100 is generally cylindrical in shape with an open top and a first material filling port 101. The first material filling port 101 is used to fill the interior of the degassing container 100 with vacuum multilayer insulation material. A vacuum flange is provided on the first material filling port 101, forming a detachable connection between the vacuum flange and the upper sealing cover 110. The sealing cover 110 is generally circular, its shape matching the first material filling port 101. When installed, the sealing cover 110 can close the top of the degassing container 100 to maintain the isolation between the interior and exterior of the degassing container 100. Furthermore, a vacuum extraction port 111 is provided on the sealing cover 110, penetrating through the sealing cover 110. The vacuum extraction port 111 has internal threads for connecting to the vacuum pipe of the external vacuum assembly 400. Meanwhile, a heating tube 120 is installed inside the degassing container 100. The main body of the heating tube 120 is arranged along the inner wall of the degassing container 100, has an internal resistance wire and an external insulation layer, and is divided into multiple tube segments. The two terminals of the heating tube 120 are inserted through the side wall of the degassing container 100 and are electrically connected to the heating power supply 200 outside the degassing container 100 through a transmission line. It should be noted that in one or more other embodiments, the heating tube 120 can also be replaced by other suitable heating devices.

[0051] The heating power supply 200 is used to energize the resistance wire inside the heating tube 120 to provide heat. The heating power supply 200 is electrically connected to both terminals of the heating tube 120, and is also electrically connected to the power controller 210. The power controller 210 adjusts the current input from the heating power supply 200 to the heating tube 120, thereby controlling the heat generated by the resistance wire inside the heating tube 120 and adjusting the temperature inside the degassing container 100.

[0052] The temperature detection component 300 is used to detect and provide feedback on the internal temperature of the degassing container 100 in real time. The temperature detection component 300 mainly includes a temperature transmitter 310 and a temperature controller 320 that are electrically connected to each other. The temperature transmitter 310 is an integrated temperature transmitter, combining the temperature sensing element and the signal conversion and amplification element. The measuring end 312 of the temperature transmitter 310 passes through the sealing cover 110 and extends into the degassing container 100. The temperature sensor portion of the temperature transmitter 310 generates a resistance or potential effect due to temperature, which is converted to produce a differential voltage signal. This signal is amplified by the signal conversion and amplification element of the temperature transmitter 310, and then converted from voltage to current to output a 4-20mA current signal corresponding to the measurement range. It should be noted that the temperature sensing element in this embodiment can be a resistance temperature detector (RTD), a thermocouple, or a semiconductor thermistor, etc. In addition, the temperature controller 320 can receive the current signal from the temperature transmitter 310 to determine whether the real-time temperature inside the degassing container 100 meets the set value. When the real-time temperature does not meet the current set value, it can transmit a signal to the power controller 210 based on the difference between the current real-time temperature and the set value, and adjust the temperature inside the degassing container 100 through the power controller 210.

[0053] The vacuum pumping assembly 400 is used to perform vacuuming during the pretreatment stage inside the degassing container 100, thereby promoting the escape of gas from the multilayer material interlayer under high-temperature conditions and reducing the amount of gas remaining in the interlayer. In this embodiment, the vacuum pumping assembly 400 mainly includes: a vacuum gauge 410, a vacuum unit 420, and a vacuum controller 430, etc. The vacuum gauge 410 is inserted into the first vacuum measurement interface 102 located on the side wall of the degassing container 100 and communicates with the interior of the degassing container 100. To avoid the influence of temperature changes inside the degassing container 100 on the measurement accuracy of the vacuum gauge 410, the vacuum gauge 410 in this embodiment uses a thin-film capacitance gauge, calculating the vacuum level by measuring the force of the gas on the thin film. However, it should be noted that the vacuum gauge 410 in this embodiment is also suitable for other vacuum detection devices that measure the vacuum level through mechanical elements. The vacuum unit 420 is located outside the degassing container 100. The vacuum unit 420 is connected to the vacuum extraction port 111 on the sealing cover 110, and draws gas from inside the degassing container 100 through the vacuum extraction port 111 to increase the vacuum level. Simultaneously, the vacuum controller 430 is electrically connected to the vacuum unit 420 and signal-connected to the vacuum gauge 410. The vacuum controller 430 can receive the vacuum level signal detected and fed back by the vacuum gauge 410 in real time. By comparing the real-time vacuum level with the set vacuum level, the controller controls the opening and closing of the vacuum unit 420, thereby maintaining a stable vacuum level inside the degassing container 100. This increases the amount of gas removed from the vacuum multilayer insulation material inside the degassing container 100 by the heating equipment.

[0054] One specific working method of this embodiment is as follows:

[0055] First, the multi-layer insulation material is filled into the degassing container 100 through the first material filling port 101, and then the sealing cap 110 is installed to close the first material filling port 101. After the insulation material is filled, the heating temperature is set, the heating power supply 200 is turned on, and the heating tube 120 is used to heat the insulation material to fully degas it. During this process, the real-time heating temperature in the degassing container 100 is transmitted to the temperature controller 320 through the temperature transmitter 310. The temperature controller 320 judges the difference between the real-time heating temperature and the set temperature, and then transmits the adjustment signal to the power controller 210. The power controller 210 controls the current input to the heating tube 120 to stabilize the real-time temperature within the allowable difference range of the set temperature. At the same time, the vacuum gauge 410 transmits the vacuum degree signal in the container to the vacuum controller 430, and the vacuum controller 430 controls the vacuum unit 420 to start. When the vacuum degree reaches the set value, the vacuum controller 430 controls the vacuum unit 420 to shut down, thus completing the heating and degassing pretreatment of the vacuum multi-layer insulation material.

[0056] In this embodiment, the vacuum heating degassing pretreatment device heats the insulation material by electrically connecting the heating power supply 200 to the heating equipment inside the degassing container 100, allowing the insulation material to be fully degassed. Then, the vacuum pumping component 400 pumps air from the sealed space inside the degassing container 100 to increase the vacuum level, so that the gas released from the insulation material interlayer can be fully removed, reducing the amount of gas remaining in the interlayer. This solves the problem that the pretreatment of vacuum multilayer insulation materials by high-temperature baking and other methods in the prior art is incomplete, and a lot of gas remains, which affects the subsequent low-temperature vacuum pumping, resulting in high cost, low efficiency and slow speed of the vacuum multilayer insulation material evacuation process.

[0057] Meanwhile, in this embodiment, a temperature detection component 300 is also set up. The temperature transmitter 310 and the temperature controller 320 work together to adjust the operation of the heating power supply 200 and the heating tube 120, thereby controlling the temperature inside the degassing container 100 within the set range. On the one hand, this prevents the heating temperature inside the degassing container 100 from being too low, which would result in insufficient gas release. On the other hand, it also avoids the heating temperature inside the degassing container 100 from being too high, which would damage and affect the performance of some materials in the multilayer composite material, thus ensuring the service life and stability of the pretreated multilayer composite material.

[0058] In addition, in this embodiment, the first material filling port 101 is a CF flange (Conflat Flange) interface. The CF flange can adapt to ultra-high vacuum systems and is a metal static sealing flange. It achieves a high-sealing vacuum seal by deforming an oxygen-free copper gasket (or other soft metal) through internal knife-edge compression. It is also easy to install and disassemble, regardless of gender. In this embodiment, an insulating interface is provided at the connection between the outer wall of the degassing container 100 and the transmission line of the heating power supply 200, ensuring electrical isolation and safety while preventing electrochemical corrosion and external environmental interference. Furthermore, in this embodiment, the first vacuum measurement interface 102 is provided with a multi-pin connector for transmitting high-speed, high-quality data signals, ensuring timely vacuum adjustment.

[0059] Example 2

[0060] Based on the above embodiments, a method for using the vacuum heating degassing pretreatment device is further proposed, and a second embodiment is provided below.

[0061] Please see Figure 2 The second embodiment proposes a vacuum heating degassing pretreatment method. This method mainly utilizes the vacuum heating degassing pretreatment device from the first embodiment to pretreat the vacuum multilayer insulation material before evacuation in a low-temperature vacuum device. This vacuum heating degassing pretreatment method can also improve the degassing effect of the pretreatment process, thereby improving the processing speed and efficiency of the subsequent evacuation process of the vacuum multilayer insulation material. The vacuum heating degassing pretreatment method mainly includes the following steps:

[0062] S10. After loading the multi-layer insulation material into the degassing container 100 through the first material filling port 101, install the sealing cap 110 to close the first material filling port 101.

[0063] S20. After the insulation material is filled, set the heating temperature and vacuum level, start the heating power supply 200, and use the heating tube 120 to heat the insulation material to fully release the gas.

[0064] S30. The vacuum level inside the degassing container 100 is detected by the vacuum gauge 410, and the real-time vacuum level signal inside the container is transmitted to the vacuum controller 430. The vacuum controller 430 controls the start and stop of the vacuum unit 420 according to the difference between the real-time vacuum level and the set vacuum level.

[0065] S40. The real-time heating temperature inside the degassing container 100 is detected by the temperature transmitter, and the real-time heating temperature signal is transmitted to the temperature controller 320; the temperature controller 320 determines the difference between the real-time heating temperature and the set heating temperature, and then transmits the adjustment signal to the power controller 210; the power controller 210 controls the current of the power input to the heating tube 120, thereby adjusting the real-time heating temperature inside the degassing container 100.

[0066] It should be noted that there is no fixed execution order for steps S30 and S40 in this embodiment. The temperature control of step S30 can be started first, followed by the vacuuming of step S40; or the vacuuming of step S40 can be started first, followed by the temperature control of step S30; or steps S30 and S40 can be started simultaneously.

[0067] In this embodiment, the vacuum heating degassing pretreatment method uses a heating power supply 200 electrically connected to a heating device inside the degassing container 100 to heat the insulation material, allowing it to fully release gas. Then, a vacuum pumping assembly 400 is used to evacuate the sealed space inside the degassing container 100, increasing the vacuum level. This ensures that the gas released from the insulation material interlayer is fully removed, reducing the amount of residual gas in the interlayer. By detecting and controlling the vacuum level inside the degassing container 100, the vacuum level is kept stable. This solves the problem in existing technologies where high-temperature baking and other methods do not thoroughly pretreat the vacuum multilayer insulation material, leaving a significant amount of residual gas that affects subsequent low-temperature vacuum pumping, resulting in high cost, low efficiency, and slow speed in the vacuum multilayer insulation material evacuation process.

[0068] Furthermore, in step S30 of this embodiment, when the real-time vacuum level is lower than the set vacuum level, the vacuum controller 430 controls the vacuum unit 420 to start; when the real-time vacuum level reaches the set vacuum level, the vacuum controller 430 controls the vacuum unit 420 to shut down, thereby maintaining a stable vacuum level in the degassing container 100.

[0069] In addition, in step S40 of this embodiment, when the real-time heating temperature is lower than the set heating temperature, the temperature controller 320 sends a heating adjustment signal, which adjusts the heating power supply 200 through the power controller 210 to increase the current input to the heating tube 120 of the heating power supply 200, so that the heating temperature in the degassing container 100 will not be too low, resulting in insufficient gas release; when the real-time heating temperature is higher than the set heating temperature, the temperature controller 320 sends a cooling adjustment signal, which adjusts the heating power supply 200 through the power controller 210 to decrease the current input to the heating tube 120 of the heating power supply 200, thereby also avoiding the damage and impact on the performance of some materials in the multilayer composite material due to excessively high heating temperature in the degassing container 100, and ensuring the service life and stability of the pretreated multilayer composite material.

[0070] Example 3

[0071] In the above embodiments, the vacuum heating degassing pretreatment device uses heating tube 120 to heat the entire interior of the degassing container 100. In some cases, it is not possible to completely and uniformly heat all parts of the vacuum multilayer insulation material, resulting in uneven degassing effect in each part. This leads to the problem that the insulation performance of the material may vary and may cause deformation of the multilayer structure inside the material. In order to further improve the performance of the vacuum heating degassing pretreatment device in terms of heating uniformity based on the first embodiment and improve the comprehensiveness of the technical solution of the present invention, a third embodiment is provided below.

[0072] Please see Figures 3-7 The third embodiment proposes another vacuum heating degassing pretreatment device, different from the embodiments described above. This vacuum heating degassing pretreatment device is also suitable for pretreatment of vacuum multilayer insulation materials before evacuation in a low-temperature vacuum device. This vacuum heating degassing pretreatment device also mainly includes a degassing container 100, and external components such as a heating power supply 200, a temperature detection component 300, and a vacuuming component 400. The main difference between the vacuum heating degassing pretreatment device in the third embodiment and the vacuum heating degassing pretreatment device in the first embodiment lies in the structure of the degassing container 100.

[0073] like Figure 3 As shown, the degassing container 100 in the third embodiment mainly consists of an outer cylinder 140, an inner cylinder 130 disposed inside the outer cylinder 140, and a control box 150 disposed below the outer cylinder 140.

[0074] The outer cylinder 140 is roughly cylindrical in shape, sealed at the top, and does not have a sealing cap 110. Instead, a vacuum extraction port 111, communicating with the interior of the outer cylinder 140, is directly provided on its top wall. Simultaneously, on the side wall of the outer cylinder 140 away from the vacuum extraction port 111, several parallel second material filling ports 141 are provided from top to bottom for layering vacuum multilayer insulation material from the side of the degassing container 100. Furthermore, an annular groove 142 is provided at the bottom of the outer cylinder 140 for connecting to the inner cylinder 130.

[0075] The inner cylinder 130 is also roughly cylindrical in shape, hollow inside, and has several horizontal shelves 133 arranged parallel from top to bottom in the inner cavity of the inner cylinder 130. Several vent holes 134 are provided on the shelves 133, and heating resistance wires (not shown in the figure) are evenly arranged inside the shelves 133. At the same time, several parallel third material filling ports 131 are opened from top to bottom on one side of the side wall of the inner cylinder 130. The third material filling ports 131 are adapted to the shape and size of the second material filling ports 141. When the third material filling ports 131 and the second material filling ports 141 are aligned, vacuum multilayer insulation material can be layered and placed from the side of the degassing container 100 onto the shelves 133 inside the inner cylinder 130. Furthermore, a vacuum connection port 135 is provided on the top wall of the inner cylinder 130. The vacuum connection port 135 can be aligned with the vacuum extraction port 111 on the outer cylinder 140 to connect the connecting pipeline of the vacuum unit 420 to the inside of the inner cylinder 130. The vacuum connection port 135 is located on the side of the top wall of the inner cylinder that is close to the third material filling port 131. Thus, when the vacuum connection port 135 is aligned with the vacuum extraction port 111, the third material filling port 131 and the second material filling port 141 will be staggered, isolating the inside of the degassing container 100 from the outside and meeting the conditions for vacuuming. In addition, an outwardly protruding flange 136 is provided on the outer side wall of the inner cylinder 130 near the bottom. A protruding ring 132 is provided on the flange 136. The protruding ring 132 is adapted to the shape of the annular groove 142 at the bottom of the outer cylinder 140 and is slidably embedded in the annular groove 142, so that the inner cylinder 130 and the outer cylinder 140 can rotate relative to each other around their common axis. In this embodiment, a worm gear 137 is also provided below the bottom wall of the inner cylinder 130 to cooperate with other mechanisms to control the rotation of the inner cylinder 130 from the outside.

[0076] Meanwhile, the control box 150 is roughly rectangular in shape. A circular opening is provided on the top wall of the control box 150, and it is fitted onto the outer side wall of the outer cylinder 140 near its lower end. The control box 150 is hollow inside, and a worm gear 137 located below the inner cylinder 130 extends into the interior of the control box 150. Furthermore, a worm 151 is rotatably mounted on the control box 150 via bearings. The middle part of the worm 151 passes into the interior of the control box 150 and meshes with the worm gear 137 for transmission. One end of the worm 151 extends from the front of the control box 150, and a handwheel 152 is provided on this outwardly extending end to facilitate the operator in controlling the relative rotation angle between the inner cylinder 130 and the outer cylinder 140.

[0077] In addition, in this embodiment, the structure of the heating power supply 200, temperature detection component 300, and vacuuming component 400 outside the degassing container 100 can be set in a manner basically the same as in the above embodiment. The heating power supply 200 and the power controller 210 are designed inside the control box 150. At the same time, a control panel 153 is provided on the front side of the control box 150. The control panel 153 is electrically connected to both the heating power supply 200 and the power controller 210, and is used by the operator to start, stop, and adjust the heating power supply 200 from the outside.

[0078] One specific working method of this embodiment is as follows:

[0079] First, by rotating the handwheel 152, the plurality of third material filling ports 131 on the inner cylinder 130 are aligned with the plurality of second material filling ports 141 on the outer cylinder 140. Then, the multi-layer insulation material is loaded into the degassing container 100 through the connecting port formed by the third material filling ports 131 and the second material filling ports 141. After the insulation material is filled, by rotating the handwheel 152, the plurality of third material filling ports 131 on the inner cylinder 130 are staggered with the plurality of second material filling ports 141 on the outer cylinder 140, and the vacuum connecting port 135 on the inner cylinder 130 is aligned with the vacuum extraction port 111 on the outer cylinder 140. Then, the vacuum extraction pipe of the vacuum extraction assembly 400 is set through the vacuum extraction port 111 and the vacuum connecting port 135. Next, the heating temperature is set via the control panel 153. The switch on the heating power supply 200 is turned on, and the heating tube 120 is used to heat the insulation material to fully degas it. During this process, the real-time heating temperature in the degassing container 100 is transmitted to the temperature controller 320 via the temperature transmitter 310. The temperature controller 320 judges the difference between the real-time heating temperature and the set temperature, and then transmits the adjustment signal to the power controller 210. The power controller 210 controls the current input to the heating tube 120 to keep the real-time heating temperature within the allowable error range of the set heating temperature. At the same time, the vacuum gauge 410 transmits the vacuum degree signal in the container to the vacuum controller 430, and the vacuum controller 430 controls the vacuum unit 420 to start. When the vacuum degree reaches the set value, the vacuum controller 430 controls the vacuum unit 420 to shut down, thus completing the heating and degassing pretreatment of the vacuum multilayer insulation material.

[0080] In this embodiment, the vacuum heating degassing pretreatment device uses an inner cylinder 130 and an outer cylinder 140 that can rotate relative to each other. The insulation material is layered and filled using the alignment of several third material filling ports 131 on the inner cylinder 130 and several second material filling ports 141 on the outer cylinder 140. After layered filling, the insulation material is uniformly heated using multi-layer shelves 133 equipped with internal heating devices. The degassing container 100 is sealed by the misalignment of the third material filling ports 131 and the second material filling ports 141. Simultaneously, when the third material filling ports 131 and the second material filling ports 141 are misaligned, the vacuum connection port 135 on the inner cylinder 130 and the vacuum extraction port 111 on the outer cylinder 140 are aligned and connected, providing a vacuum pipe for the vacuum extraction assembly 400 required for vacuuming. This solves the problem in the above embodiment where the various parts of the vacuum multilayer insulation material could not be heated uniformly, resulting in uneven degassing effects, potential differences in insulation performance, and possible deformation of the multi-layer structure within the material.

[0081] Meanwhile, in this embodiment, the annular groove 142 at the bottom of the outer cylinder 140 and the convex ring 132 on the outer side of the inner cylinder 130 are both T-shaped in the circumferential direction and are compatible with each other, so that the convex ring 132 can be stably slidably disposed in the annular groove 142, making the outer cylinder 140 and the inner cylinder 130 more stable during relative rotation.

[0082] In addition, in this embodiment, a first temperature measuring interface 149 is provided on the top wall of the outer cylinder 140, and a second temperature measuring interface 139 is provided on the top wall of the inner cylinder 130. When the vacuum communication port 135 on the inner cylinder 130 is aligned and connected with the vacuum extraction port 111 on the outer cylinder 140, the first temperature measuring interface 149 and the second temperature measuring interface 139 can also be aligned and connected for inserting and setting the measuring end 312 of the temperature transmitter 310. At the same time, a second vacuum measuring interface 148 is provided on the side wall of the outer cylinder 140, and a third vacuum measuring interface 138 is provided on the side wall of the inner cylinder 130. When the vacuum communication port 135 on the inner cylinder 130 is aligned and connected with the vacuum extraction port 111 on the outer cylinder 140, the second vacuum measuring interface 148 and the third vacuum measuring interface 138 can also be aligned and connected for inserting and setting the vacuum gauge 410. Furthermore, a power socket is provided on the side wall of the outer cylinder 140, between several second material filling ports 141, and several heating device terminals are provided on the side wall of the inner cylinder 130, on the opposite side of several third material filling ports 131. When the vacuum connection port 135 on the inner cylinder 130 is aligned and connected with the vacuum extraction port 111 on the outer cylinder 140, the power socket and terminals can be aligned for connecting the heating power supply 200.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum heating degassing pretreatment device, characterized in that, Include: A degassing container (100) is provided with a vacuum extraction port (111) and a material filling port communicating with its interior; and a heating device is provided inside the degassing container (100). Heating power supply (200) is electrically connected to the heating device; and The vacuum assembly (400) has at least a vacuum gauge (410) disposed on the outer wall of the degassing container (100) and a vacuum unit (420) disposed outside the degassing container (100); the vacuum unit (420) is electrically connected to a vacuum controller (430), and the vacuum controller (430) is signal connected to the vacuum gauge (410); The vacuum controller (430) can control the opening and closing of the vacuum unit (420) according to the vacuum degree signal fed back by the vacuum gauge (410), so that the degassing container (100) can maintain a stable vacuum degree, thereby increasing the amount of gas removed by the heating device heating the vacuum multilayer insulation material in the degassing container (100). The degassing container (100) has at least an outer cylinder (140) and an inner cylinder (130), the inner cylinder (130) being rotatably disposed inside the outer cylinder (140); the material filling port includes a plurality of second material filling ports (141) disposed on the outer cylinder (140) and a plurality of third material filling ports (131) disposed on the inner cylinder (130), the second material filling ports (141) and the third material filling ports (131) being adapted to each other; and the vacuum extraction port (111) is disposed on the outer cylinder (140), and the inner cylinder (130) is provided with a vacuum communication port (135) adapted to the vacuum extraction port (111); wherein, when the vacuum extraction port (111) and the vacuum communication port (135) are aligned, the second material filling ports (141) and the third material filling ports (131) are misaligned with each other, so that the interior of the degassing container (100) is sealed.

2. The vacuum heating degassing pretreatment device as described in claim 1, characterized in that, The heating power supply (200) is electrically connected to a power controller (210), which can adjust the current input to the heating device from the heating power supply (200).

3. The vacuum heating degassing pretreatment device as described in claim 2, characterized in that, It also includes: a temperature detection component (300); the temperature detection component (300) has at least a temperature transmitter (310), the temperature transmitter (310) is electrically connected to a temperature controller (320), and the temperature controller (320) is signal-connected to the power controller (210); the temperature controller (320) can adjust the current input of the heating power supply (200) to the heating device according to the temperature signal inside the degassing container (100) fed back by the temperature detection component (300).

4. The vacuum heating degassing pretreatment device as described in claim 1, characterized in that, The outer cylinder (140) has an annular groove (142) at its bottom; the inner cylinder (130) has a flange (136) on its outer side wall, and a protruding ring (132) is provided on the flange (136). The protruding ring (132) is slidably embedded in the annular groove (142), so that the outer cylinder (140) and the inner cylinder (130) can rotate relative to each other.

5. The vacuum heating degassing pretreatment device as described in claim 1, characterized in that, A control box (150) is provided below the outer cylinder (140); a worm gear (137) is provided at the bottom of the inner cylinder (130), and the worm gear (137) extends into the control box (150); and a worm (151) is provided inside the control box (150), and the worm (151) meshes with the worm gear (137); a handwheel (152) is provided at the end of the worm (151) that extends out of the control box (150).

6. A vacuum heating degassing pretreatment method, characterized in that, Using the vacuum heating degassing pretreatment apparatus as described in any one of claims 1-5, the vacuum heating degassing pretreatment method includes the following steps: S10. The multi-layer insulation material is loaded into the degassing container (100) through the material filling port, and the material filling port is sealed. S20. Set the vacuum level, start the heating power supply (200), and heat the multi-layer insulation material through the heating device to release the gas; S30. Detect the real-time vacuum level inside the degassing container (100), and control the start-up and shutdown of the vacuum unit (420) based on the difference between the real-time vacuum level and the set vacuum level.

7. The vacuum heating degassing pretreatment method as described in claim 6, characterized in that, The S20 step further includes: setting the heating temperature; The vacuum heating degassing pretreatment method further includes: S40. Detect the real-time heating temperature inside the degassing container (100), determine the difference between the real-time heating temperature and the set heating temperature, and control the current input to the heating power supply (200) of the heating device according to the difference between the real-time heating temperature and the set heating temperature, so as to adjust the real-time heating temperature inside the degassing container (100). There is no fixed execution order for steps S30 and S40.

8. The vacuum heating degassing pretreatment method as described in claim 6, characterized in that, The S30 step further includes: when the real-time vacuum degree is lower than the set vacuum degree, the vacuum controller (430) controls the vacuum unit (420) to start; when the real-time vacuum degree reaches the set vacuum degree, the vacuum controller (430) controls the vacuum unit (420) to shut down.

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