Vacuum heating degassing pretreatment device and method

Abstract

The invention provides a vacuum heating degassing pretreatment device and method, and relates to the field of heat insulation materials. The vacuum heating degassing pretreatment device comprises a degassing container, wherein a vacuum extraction opening and a material filling opening which are communicated with the interior of the degassing container are formed in the degassing container; heating equipment is arranged in the degassing container; the heating power supply is electrically connected with the heating equipment; the vacuumizing assembly is at least provided with a vacuum gauge arranged on the outer side wall 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 in signal connection with the vacuum gauge; wherein the vacuum controller can control the opening and closing of the vacuum unit according to a vacuum degree signal fed back by the vacuum gauge, so that a stable vacuum degree can be kept in the degassing container; the degassing effect of the pretreatment process can be improved, and the treatment speed and the treatment efficiency of the vacuumizing process of the low-temperature vacuum equipment are improved.

Description

Technical Field

[0001] The invention relates to the field of thermal insulation materials, and in particular to a vacuum heating degassing pretreatment device and method. Background Art

[0002] With the rapid development of the cryogenic insulation storage and transportation industry, the research on various factors affecting the cryogenic insulation storage and transportation process is also booming. At present, cryogenic insulation technologies mainly include: stacking insulation, vacuum powder (fiber) insulation, high vacuum multi-layer insulation and high vacuum multi-screen insulation. Among them, vacuum multi-layer insulation has gained special favor due to its good insulation performance and simple process. It has been widely used in small cryogenic insulation containers, cryogenic tank trucks and other fields, and its application field has a trend of further expansion.

[0003] Among the many factors that affect the performance of multi-layer thermal insulation, the vacuum degree of the vacuum multi-layer thermal insulation material used in high vacuum multi-layer thermal insulation plays a very critical role. Studies have shown that when the vacuum degree is low, that is, P>10Pa, the change in vacuum degree has little effect on the thermal conductivity of the multi-layer material; when the vacuum degree is 10~10 -2 In the prior art, the pretreatment of vacuum multilayer thermal insulation materials usually needs to be carried out by high-temperature baking and other methods, so that the gas adsorbed in the vacuum multilayer thermal insulation materials can be desorbed as much as possible and faster, so as to reduce the degassing rate of the material, so that the vacuum multilayer thermal insulation materials can reach a higher vacuum degree when the system of the low-temperature vacuum equipment is evacuated, and the vacuum degree can be maintained for a longer time. However, the existing high-temperature baking and other methods are not thorough in the pretreatment of vacuum multilayer thermal insulation materials, and there will still be a lot of residual gas that affects the subsequent vacuuming of the low-temperature vacuum equipment, resulting in high cost, low efficiency and slow speed of the vacuum multilayer thermal insulation material evacuation process. Summary of the invention

[0004] The present invention aims to solve the problem that the existing high-temperature baking and other methods in the prior art are not thorough in the pretreatment of vacuum multi-layer insulation materials, and a large amount of residual gas will still affect the subsequent vacuum pumping of low-temperature vacuum equipment, resulting in high cost, low efficiency and slow speed of the vacuum multi-layer insulation material evacuation process. The present invention provides a vacuum heating degassing pretreatment device and method that can improve the degassing effect of the pretreatment process, thereby improving the subsequent vacuum pumping process of the vacuum multi-layer insulation material low-temperature vacuum equipment.

[0005] The technical solution adopted by the present invention is: A vacuum heating degassing pretreatment device, comprising: A degassing container, wherein the degassing container is provided with a vacuum exhaust port and a material filling port communicated with the interior thereof; and a heating device is provided inside the degassing container; a heating power source electrically connected to the heating device; and A vacuum pumping assembly, comprising at least a vacuum gauge disposed on the outer side 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; Among them, the vacuum controller can control the opening and closing of the vacuum unit according to the vacuum signal fed back by the vacuum gauge, so that a stable vacuum degree can be maintained in the degassing container, so as to increase the amount of gas released by the vacuum multi-layer insulation material in the degassing container when the heating equipment heats it.

[0006] Furthermore, the material filling port is arranged at the top of the degassing container; a sealing cover is detachably provided on the material filling port, and the vacuum exhaust port is arranged on the sealing cover.

[0007] Furthermore, the heating power supply is electrically connected to a power supply controller, and the power supply controller can adjust the current of the heating power supply input into the heating device.

[0008] 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 of the heating power input to the heating device according to the temperature signal inside the degassing container fed back by the temperature detection component.

[0009] Furthermore, the degassing container has at least an outer cylinder and an inner cylinder, and the inner cylinder is rotatably arranged inside the outer cylinder; the material filling port includes a plurality of second material filling ports arranged on the outer cylinder and a plurality of third material filling ports arranged on the inner cylinder, and the second material filling ports and the third material filling ports are adapted to each other; and the vacuum exhaust port is arranged on the outer cylinder, and a vacuum connecting port adapted to the vacuum exhaust port is arranged on the inner cylinder; wherein, when the vacuum exhaust port is aligned with the vacuum connecting port, the second material filling port and the third material filling port are offset from each other, so that the interior of the degassing container is sealed.

[0010] Furthermore, an annular groove is provided at the bottom of the outer cylinder; a flange is provided on the outer wall of the inner cylinder, a convex ring is provided on the flange, and the convex ring is slidably embedded in the annular groove, so that the outer cylinder and the inner cylinder can rotate relatively.

[0011] Furthermore, a control box is provided below the outer cylinder; a worm wheel is provided at the bottom of the inner cylinder, and the worm wheel extends into the control box; and a worm is provided inside the control box, and the worm is meshed with the worm wheel; a handwheel is provided at one end of the worm extending outside the control box.

[0012] A vacuum heating degassing pretreatment method, using the vacuum heating degassing pretreatment device as described above, the vacuum heating degassing pretreatment method comprises the following steps: S10. The multilayer insulation material is loaded into the degassing container through the material filling port, and the material filling port is closed; S20. Set the vacuum degree, start the heating power supply, and heat the multilayer insulation material through the heating device to deflate it; S30. Detect the real-time vacuum degree in the degassing container, and control the start and stop of the vacuum unit according to the difference between the real-time vacuum degree and the set vacuum degree.

[0013] Furthermore, the step S20 further includes: setting a heating temperature; The vacuum heating degassing pretreatment method also includes: S40. Detecting the real-time heating temperature in the degassing container, determining the difference between the real-time heating temperature and the set heating temperature, and controlling the current of the heating power input to the heating device according to the difference between the real-time heating temperature and the set heating temperature to adjust the real-time heating temperature in the degassing container; There is no fixed execution order for steps S30 and S40.

[0014] Furthermore, the step S30 also includes: when the real-time vacuum degree is lower than the set vacuum degree, the vacuum controller controls the vacuum unit to start; when the real-time vacuum degree reaches the set vacuum degree, the vacuum controller controls the vacuum unit to shut down.

[0015] The beneficial effects of the present invention are: 1. The pretreatment device of the present invention is provided with a heating power supply and electrically connected to the heating device in the degassing container for heating, so that the thermal insulation material can be fully degassed; and then the vacuum pumping component is used to evacuate the enclosed space in the degassing container to increase the vacuum degree, so that the gas released in the interlayer of the thermal insulation material can be fully removed, and the residual amount of gas in the interlayer is reduced, thereby solving the problem that the pretreatment of the vacuum multi-layer thermal insulation material by high-temperature baking and other methods in the prior art is not thorough, and there will still be a lot of residual gas that affects the subsequent vacuum pumping of the low-temperature vacuum equipment, resulting in high cost, low efficiency and slow speed of the vacuum multi-layer thermal insulation material evacuation process; 2. The pretreatment device of the present invention also controls the temperature in the degassing container within a set range by setting a temperature detection component, and adjusting the heating power supply and the heating tube through the temperature transmitter and the temperature controller. On the one hand, the heating temperature in the degassing container will not be too low to cause insufficient gas release; on the other hand, it also avoids the heating temperature in the degassing container being too high to damage and affect the performance of some materials in the multi-layer composite material, thereby ensuring the service life and stability of the pretreated multi-layer composite material; 3. The pretreatment method of the present invention is to set a heating power supply to electrically connect the heating equipment in the degassing container for heating, so that the thermal insulation material can be fully degassed; then the vacuum pumping component is used to evacuate the enclosed space in the degassing container to increase the vacuum degree, so that the gas released in the interlayer of the thermal insulation material can be fully removed, and the residual amount of gas in the interlayer is reduced. The vacuum degree in the container is maintained stable by detecting and controlling the vacuum degree in the container, thereby solving the problem that the pretreatment of the vacuum multi-layer thermal insulation material by high-temperature baking and other methods in the prior art is not thorough, and a large amount of gas will still remain, affecting the subsequent vacuum pumping of the low-temperature vacuum equipment, resulting in the high cost, low efficiency and slow speed of the vacuum multi-layer thermal insulation material evacuation process; 4. The pretreatment device of the present invention also provides an inner cylinder and an outer cylinder that can rotate relative to each other, and utilizes the alignment of several third material filling ports on the inner cylinder and several second material filling ports on the outer cylinder to perform layered filling of the insulation material, and after the layered filling, the insulation material can be evenly heated by using a multi-layer shelf with a heating device inside; and the interior of the degassing container is sealed by the misalignment of the third material filling port and the second material filling port; and at the same time, when the third material filling port and the second material filling port are misaligned, the vacuum connecting port on the inner cylinder and the vacuum exhaust port on the outer cylinder are aligned and connected, and a vacuum pipe of the vacuum exhaust component required for vacuuming is provided. This solves the problem that the various parts of the vacuum multi-layer insulation material cannot be completely heated evenly in the above-mentioned embodiment, resulting in uneven degassing effects in various parts, which may lead to differences in the insulation performance of some materials and may cause deformation of the multi-layer structure inside the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the pretreatment device of Example 1 of the present invention; Figure 2 is a flow chart of a preprocessing method according to Embodiment 2 of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the degassing container of Example 3 of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the inner cylinder of Example 3 of the present invention; Figure 5 is a top view of a shelf according to Embodiment 3 of the present invention; Figure 6It is a bottom view of the outer cylinder of Example 3 of the present invention; Figure 7 This is a bottom view of the control box of embodiment 3 of the present invention.

[0018] Reference numerals: 100-degassing container, 101-first material filling port, 102-first vacuum measurement interface, 110-sealing cover, 111-vacuum exhaust port, 120-heating tube, 130-inner cylinder, 131-third material filling port, 132-convex ring, 133-shelf, 134-vent, 135-vacuum communication 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 slide groove, 148-second vacuum measurement interface, 149-first temperature measurement interface, 150-control box, 151-worm, 152-handwheel, 153-control panel; 200-heating power supply, 210-power supply controller; 300-temperature detection component, 310-temperature transmitter, 312-measuring end, 320-temperature controller; 400-vacuum pumping assembly, 410-vacuum gauge, 420-vacuum unit, 430-vacuum controller. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0021] The embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] Before the existing vacuum multilayer thermal insulation materials are evacuated by low-temperature vacuum equipment, they usually need to be pretreated. The pretreatment generally needs to be carried out by high-temperature baking and other methods, so that more gas is adsorbed in the vacuum multilayer thermal insulation materials and desorbed faster, so as to reduce the degassing rate of the material when the low-temperature vacuum equipment is evacuated, so that the vacuum multilayer thermal insulation materials can reach a higher vacuum degree when the system of the low-temperature vacuum equipment is evacuated, and the vacuum degree can be maintained for a longer time. However, the existing high-temperature baking and other methods for pretreatment of vacuum multilayer thermal insulation materials are difficult to remove the gas in the interlayer of the vacuum multilayer thermal insulation materials, and only part of the gas will escape at high temperature, while there will still be a lot of gas remaining inside the thermal insulation material, which will affect the subsequent vacuum evacuation of the low-temperature vacuum equipment, resulting in a decrease in the efficiency and speed of the vacuum multilayer thermal insulation material evacuation process, and prolonging the working time, bringing more problems such as high cost.

[0024] In order to solve the above problems in the prior art, this embodiment provides a vacuum heating degassing pretreatment device, which is used to pretreat the vacuum multilayer thermal insulation material before the low-temperature vacuum equipment is evacuated. The vacuum heating degassing pretreatment device can improve the degassing effect of the pretreatment process, thereby improving the processing speed and processing efficiency of the subsequent vacuum multilayer thermal insulation material low-temperature vacuum equipment vacuuming process. Figure 1 The vacuum heating degassing pretreatment device mainly includes: a degassing container 100, a heating power supply 200 outside the degassing container 100, a temperature detection component 300 and a vacuum pumping component 400, etc.

[0025] The degassing container 100 is used to load the vacuum multilayer insulation material for processing, and separate the internal space from the external space to form a closed internal space. Figure 1As shown in , the degassing container 100 is roughly cylindrical in shape, with an open top and a first material filling port 101. The first material filling port 101 is used to load the vacuum multilayer insulation material into the degassing container 100, and a vacuum flange is provided on the first material filling port 101, and a detachable connection is formed between the vacuum flange and the sealing cover 110 above. The sealing cover 110 is roughly circular, and its shape is adapted to the first material filling port 101. When the sealing cover 110 is installed, the top of the degassing container 100 can be closed to keep the inside of the degassing container 100 isolated from the outside. In addition, a vacuum exhaust port 111 is provided on the sealing cover 110, and the vacuum exhaust port 111 is provided through the sealing cover 110. The vacuum exhaust port 111 is provided with an internal thread, which is used to connect the vacuum exhaust pipe of the external vacuum exhaust component 400. Meanwhile, a heating tube 120 is disposed inside the degassing container 100. The main body of the heating tube 120 is disposed along the inner wall of the degassing container 100, has an internal resistance wire and an external insulation layer, and is divided into a plurality of tube sections; two terminals of the heating tube 120 are penetrated through the side wall of the degassing container 100, and are electrically connected to the heating power source 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 may also be replaced by other suitable heating devices.

[0026] The heating power supply 200 is used to energize the resistance wire in the heating tube 120 to provide heat. The heating power supply 200 is electrically connected to both terminals of the heating tube 120, and the heating power supply 200 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 in the heating tube 120 and adjusting the temperature inside the degassing container 100.

[0027] The temperature detection component 300 is used to detect and feedback the temperature inside 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. Among them, the temperature transmitter 310 is an integrated temperature transmitter, which integrates 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 part of the temperature transmitter 310 is affected by temperature to produce resistance or potential effect, and a differential voltage signal is generated after conversion. This signal is amplified by the signal conversion and amplification element part of the temperature transmitter 310, and then converted by voltage and current to output a 4-20mA current signal corresponding to the range. It should be pointed out that the temperature sensing element in this embodiment can be a thermal resistor, a thermocouple or a semiconductor thermistor. In addition, the temperature controller 320 can receive the current signal of 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, a signal can be transmitted to the power controller 210 based on the difference between the current real-time temperature and the set value, and the temperature inside the degassing container 100 is adjusted through the power controller 210.

[0028] The vacuum pumping component 400 is used to perform vacuum pumping in the pre-treatment stage of the degassing container 100, so as to promote the escape of gas in the interlayer of the multilayer material under high temperature environment and reduce the amount of gas remaining in the interlayer. In this embodiment, the vacuum pumping component 400 mainly includes: a vacuum gauge 410, a vacuum unit 420 and a vacuum controller 430, etc. Among them, the vacuum gauge 410 is inserted into the first vacuum measurement interface 102 set on the side wall of the degassing container 100, and is connected to the inside of the degassing container 100. In order to avoid the influence of temperature changes in the degassing container 100 on the measurement accuracy of the vacuum gauge 410, the vacuum gauge 410 of this embodiment adopts a thin film capacitance gauge to infer the vacuum degree by measuring the force of the gas on the film. However, it should be pointed out that the vacuum gauge 410 in this embodiment is also suitable for using other vacuum detection devices that measure the vacuum degree through mechanical elements. The vacuum unit 420 is arranged outside the degassing container 100, and is connected to the vacuum pumping port 111 on the sealing cover 110, and extracts gas from the inside of the degassing container 100 through the vacuum pumping port 111 to increase the vacuum degree. At the same time, the vacuum controller 430 is electrically connected to the vacuum unit 420 and is connected to the vacuum gauge 410 by signal. The vacuum controller 430 can receive the vacuum degree signal detected and fed back by the vacuum gauge 410 in real time, and control the opening and closing of the vacuum unit 420 by comparing the real-time vacuum degree with the vacuum degree setting value, so as to maintain a stable vacuum degree inside the degassing container 100, so as to increase the gas removal amount released by the vacuum multi-layer insulation material in the degassing container 100 when the heating equipment is heated.

[0029] A specific working method of this embodiment is: First, the multi-layer insulation material is loaded into the degassing container 100 through the first material filling port 101, and then the sealing cover 110 is installed to seal the first material filling port 101; after the insulation material is filled, the heating temperature is set, the heating power supply 200 is started, and the insulation material is heated by the heating tube 120 to fully release gas; in this process, the real-time heating temperature in the degassing container 100 is transmitted to the temperature controller 320 through the temperature transmitter 310, and the temperature controller 320 determines the difference between the real-time heating temperature and the set temperature, and then transmits the adjustment signal to the power controller 210, and the power controller 210 controls the current input to the heating tube 120 to stabilize the real-time temperature within the difference range allowed by 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 close, and the heating and degassing pretreatment of the vacuum multi-layer insulation material is completed.

[0030] In this embodiment, the vacuum heating degassing pretreatment device is heated by setting a heating power supply 200 to be electrically connected to the heating equipment in the degassing container 100, so that the insulation material can be fully degassed; and then the vacuum pumping component 400 is used to evacuate the enclosed space in the degassing container 100 to increase the vacuum degree, so that the gas released from the interlayer of the insulation material can be fully removed, and the residual amount of gas in the interlayer is reduced, thereby solving the problem of incomplete pretreatment of the vacuum multi-layer insulation material by high-temperature baking and other methods in the prior art, and still leaving a lot of gas that affects the subsequent vacuum pumping of the low-temperature vacuum equipment, resulting in the problem of high cost, low efficiency and slow speed of the vacuum multi-layer insulation material evacuation process.

[0031] At the same time, in this embodiment, a temperature detection component 300 is provided, and the temperature transmitter 310 and the temperature controller 320 cooperate to adjust the operation of the heating power supply 200 and the heating tube 120 to control the temperature in the degassing container 100 within a set range. On the one hand, the heating temperature in the degassing container 100 will not be too low to cause insufficient gas release; on the other hand, it also avoids the heating temperature in the degassing container 100 being too high to damage and affect the performance of some materials in the multi-layer composite material, thereby ensuring the service life and stability of the pretreated multi-layer composite material.

[0032] In addition, in this embodiment, the first material filling port 101 is a CF flange (Conflat Flange) interface. The CF flange can adapt to the ultra-high vacuum system and is a metal static sealing flange. It deforms the oxygen-free copper gasket (or other soft metal) through the inner blade, thereby achieving a high-tight vacuum seal, and is easy to install and disassemble, regardless of male or female. 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, which can ensure electrical isolation and safety, while preventing electrochemical corrosion and external environmental interference. In addition, in this embodiment, a multi-core socket is provided at the first vacuum measurement interface 102 for transmitting high-speed, high-quality data signals to ensure the timeliness of vacuum adjustment.

[0033] Example 2

[0034] Based on the above embodiments, a method for applying the vacuum heating degassing pretreatment device is further proposed, and a second embodiment is provided below.

[0035] See also Figure 2 In the second embodiment, a vacuum heating degassing pretreatment method is proposed. The vacuum heating degassing pretreatment method mainly uses the vacuum heating degassing pretreatment device in the first embodiment to pretreat the vacuum multilayer thermal insulation material before the low-temperature vacuum equipment is evacuated. The vacuum heating degassing pretreatment method can also improve the degassing effect of the pretreatment process, thereby improving the processing speed and processing efficiency of the subsequent vacuum multilayer thermal insulation material evacuation process. The vacuum heating degassing pretreatment method mainly includes the following steps: S10 . After the multi-layer insulation material is loaded into the degassing container 100 through the first material filling port 101 , the sealing cover 110 is installed to seal the first material filling port 101 .

[0036] S20. After the insulation material is filled, the heating temperature and vacuum degree are set, the heating power supply 200 is started, and the insulation material is heated by the heating tube 120 to fully release air.

[0037] S30. The real-time vacuum degree in the degassing container 100 is detected by the vacuum gauge 410, and the real-time vacuum degree signal in 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 degree and the set vacuum degree.

[0038] S40. Detect the real-time heating temperature in the degassing container 100 through the temperature transmitter, and transmit the signal of the real-time heating temperature to the temperature controller 320; determine the difference between the real-time heating temperature and the set heating temperature through the temperature controller 320, and then transmit the adjustment signal to the power controller 210; control the current of the power input heating tube 120 through the power controller 210, so as to adjust the real-time heating temperature in the degassing container 100.

[0039] 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 may be started first, and then the vacuuming of step S40 may be started; or the vacuuming of step S40 may be started first, and then the temperature control of step S30 may be started; or steps S30 and S40 may be started simultaneously.

[0040] In this embodiment, the vacuum heating degassing pretreatment method is provided with a heating power supply 200 electrically connected to the heating equipment in the degassing container 100 for heating, so that the insulation material can be fully degassed; and then the vacuum pumping component 400 is used to evacuate the enclosed space in the degassing container 100 to increase the vacuum degree, so that the gas released from the interlayer of the insulation material can be fully removed, and the residual amount of gas in the interlayer is reduced. By detecting and controlling the vacuum degree in the degassing container 100, the vacuum degree in the degassing container 100 is maintained stable, thereby solving the problem that the high-temperature baking and other methods in the prior art are not thorough in pretreating the vacuum multi-layer insulation material, and a large amount of residual gas will still affect the subsequent vacuum pumping of the low-temperature vacuum equipment, resulting in the high cost, low efficiency and slow speed of the vacuum multi-layer insulation material evacuation process.

[0041] Furthermore, in step S30 of this embodiment, 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, thereby maintaining the vacuum degree in the degassing container 100 stable.

[0042] In addition, in step S40 of the present embodiment, when the real-time heating temperature is lower than the set heating temperature, the temperature controller 320 sends a temperature increase regulation signal, and adjusts the heating power supply 200 through the power supply controller 210, so that the current input by the heating power supply 200 into the heating tube 120 increases, so that the heating temperature in the degassing container 100 will not be too low to cause insufficient gas release; when the real-time heating temperature is higher than the set heating temperature, the temperature controller 320 sends a temperature decrease regulation signal, and adjusts the heating power supply 200 through the power supply controller 210, so that the current input by the heating power supply 200 into the heating tube 120 decreases, thereby avoiding the heating temperature in the degassing container 100 from being too high to damage and affect the performance of some materials in the multi-layer composite material, thereby ensuring the service life and stability of the pretreated multi-layer composite material.

[0043] Example 3

[0044] In the above embodiment, the heating method adopted by the vacuum heating degassing pretreatment device is that the heating tube 120 heats the interior of the degassing container 100 as a whole. In some cases, the various parts of the vacuum multi-layer insulation material cannot be completely and evenly heated, resulting in uneven degassing effects in various parts, which may cause differences in the insulation performance of some materials and may cause deformation of the multi-layer structure inside the material. In order to further improve the performance of the vacuum heating degassing pretreatment device in terms of heating uniformity on the basis of the first embodiment and to improve the comprehensiveness of the technical solution of the present invention, a third embodiment is provided below.

[0045] See also Figure 3-Figure 7 In the third embodiment, another vacuum heating degassing pretreatment device different from the above-mentioned embodiments is proposed. The vacuum heating degassing pretreatment device is also suitable for pretreatment of vacuum multilayer insulation materials before evacuation of low-temperature vacuum equipment. The vacuum heating degassing pretreatment device also mainly includes a degassing container 100, a heating power supply 200 outside the degassing container 100, a temperature detection component 300 and a vacuum pumping 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 is that the structure of the degassing container 100 is different.

[0046] like Figure 3 As shown in , the degassing container 100 in the third embodiment is mainly composed of an outer cylinder 140, an inner cylinder 130 arranged inside the outer cylinder 140, and a control box 150 arranged below the outer cylinder 140.

[0047] The outer cylinder 140 is roughly cylindrical, with a sealed top. The outer cylinder 140 is not provided with a sealing cover 110, but a vacuum exhaust port 111 connected to the inside of the outer cylinder 140 is directly provided on the top wall. At the same time, a plurality of second material filling ports 141 are provided from top to bottom in parallel on the side of the side wall of the outer cylinder 140 away from the vacuum exhaust port 111, which are used to layer the vacuum multi-layer insulation material from the side of the degassing container 100. In addition, an annular slide groove 142 is provided at the bottom of the outer cylinder 140 for connecting the inner cylinder 130.

[0048] The inner cylinder 130 is also roughly cylindrical, and its interior is hollow. In the inner cavity of the inner cylinder 130, a number of horizontal shelves 133 are arranged in parallel from top to bottom. A number of vent holes 134 are arranged on the shelves 133, and the resistance wires of the heating device (not shown in the figure) are evenly arranged inside the shelves 133. At the same time, on one side of the side wall of the inner cylinder 130, a number of third material filling ports 131 are opened from top to bottom and are parallel to each other. The shape and size of the third material filling port 131 and the second material filling port 141 are adapted. When the third material filling port 131 and the second material filling port 141 are aligned, the vacuum multi-layer insulation material can be layered from the side of the degassing container 100 to the several shelves 133 in the inner cylinder 130. In addition, a vacuum connecting port 135 is provided on the top wall of the inner cylinder 130. The vacuum connecting port 135 can be aligned with the vacuum exhaust port 111 on the outer cylinder 140, and is used to connect the connecting pipeline of the vacuum unit 420 to the interior of the inner cylinder 130. The vacuum connecting port 135 is provided on the side of the top wall of the inner cylinder close to the third material filling port 131, so that when the vacuum connecting port 135 is aligned with the vacuum exhaust port 111, the third material filling port 131 and the second material filling port 141 will be staggered with each other, so that the interior of the degassing container 100 is isolated from the outside, and the vacuum pumping conditions are met. In addition, a flange 136 protruding outward is provided on the outer wall of the inner cylinder 130 near the bottom, and a convex ring 132 is provided on the flange 136. The convex ring 132 is adapted in shape to 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, which is used to cooperate with other mechanisms to control the rotation of the inner cylinder 130 from the outside.

[0049] Meanwhile, the control box 150 is roughly in the shape of a rectangular parallelepiped, and a circular opening is provided on the top wall of the control box 150, and is sleeved on the outer wall of the outer cylinder 140 near the lower end. Meanwhile, the interior of the control box 150 is hollow, and the worm wheel 137 provided below the inner cylinder 130 extends into the interior of the control box 150. In addition, a worm 151 is rotatably provided on the control box 150 through a bearing, and the middle part of the worm 151 penetrates into the interior of the control box 150 and meshes with the worm wheel 137, so as to transmit the power; one end of the worm 151 extends from the front side of the control box 150, and a hand wheel 152 is provided on the end extending outward, so as to facilitate the operator to control the relative rotation angle between the inner cylinder 130 and the outer cylinder 140.

[0050] In addition, in this embodiment, the structures of the heating power supply 200, the temperature detection component 300 and the vacuum component 400 outside the degassing container 100 can be arranged in a manner substantially the same as that of the above-mentioned embodiment, wherein the heating power supply 200 and the power controller 210 are designed inside the control box 150, and a control panel 153 is arranged on the front side of the control box 150, and the control panel 153 is electrically connected to the heating power supply 200 and the power controller 210, so as to enable the operator to start, shut down and adjust the heating power supply 200 from the outside.

[0051] A specific working method of this embodiment is: First, by turning the hand wheel 152 for adjustment, the third material filling ports 131 on the inner cylinder 130 and the second material filling ports 141 on the outer cylinder 140 are aligned one by one; then, the multi-layer insulation material is loaded into the degassing container 100 through the connecting port formed by the third material filling port 131 and the second material filling port 141; after the insulation material is filled, the hand wheel 152 is turned for adjustment, the third material filling ports 131 on the inner cylinder 130 and the second material filling ports 141 on the outer cylinder 140 are staggered with each other, and the vacuum connecting port 135 on the inner cylinder 130 is aligned with the vacuum exhaust port 111 on the outer cylinder 140; then, the vacuum exhaust pipe of the vacuum exhaust component 400 is set through the vacuum exhaust port 111 and the vacuum connecting port 135; then, the heating temperature is set, and the control panel 153 is used to control the heating temperature. The switch on the heating power supply 200 is turned on to heat the insulation material by using the heating tube 120 to fully release gas. In 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 determines 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 make 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, thereby completing the heating and degassing pretreatment of the vacuum multi-layer insulation material.

[0052] In this embodiment, the vacuum heating degassing pretreatment device is provided with an inner cylinder 130 and an outer cylinder 140 that can rotate relative to each other, and the insulation material is filled in layers by aligning a plurality of third material filling ports 131 on the inner cylinder 130 with a plurality of second material filling ports 141 on the outer cylinder 140, and after the layered filling, the insulation material can be evenly heated by using a multi-layer shelf 133 with a heating device inside; and the interior of the degassing container 100 is sealed by the misalignment of the third material filling port 131 and the second material filling port 141; and when the third material filling port 131 and the second material filling port 141 are misaligned, the vacuum connecting port 135 on the inner cylinder 130 is aligned and connected with the vacuum exhaust port 111 on the outer cylinder 140, and the vacuum pipeline of the vacuum exhaust assembly 400 required for vacuuming is provided. Thus, the problem that the vacuum multi-layer insulation material cannot be evenly heated in all parts in the above embodiment, resulting in uneven degassing effect of each part, which may cause the material to have different insulation performance and may cause deformation of the multi-layer structure inside the material.

[0053] At the same time, in this embodiment, the cross-sectional shapes of the annular groove 142 at the bottom of the outer cylinder 140 and the convex ring 132 on the outside of the inner cylinder 130 along the circumferential direction are both T-shaped, and are adapted to each other, so that the convex ring 132 can be stably slidably set in the annular groove 142, making the outer cylinder 140 and the inner cylinder 130 more stable during relative rotation.

[0054] In addition, in this embodiment, a first temperature measuring interface 149 is also 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 connecting port 135 on the inner cylinder 130 is aligned and connected with the vacuum exhaust 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, and are used to insert and set the measuring end 312 of the temperature transmitter 310. At the same time, a second vacuum measuring interface 148 is also 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 connecting port 135 on the inner cylinder 130 is aligned and connected with the vacuum exhaust 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, and are used to insert and set the vacuum gauge 410. In addition, a power socket is provided on the side wall of the outer cylinder 140 and is located between the plurality of second material filling ports 141, and a plurality of wiring terminals for heating equipment are provided on the side wall of the inner cylinder 130 and are located on the side opposite to the plurality of third material filling ports 131. When the vacuum connecting port 135 on the inner cylinder 130 is aligned and connected with the vacuum exhaust port 111 on the outer cylinder 140, the power socket and the wiring terminal can be aligned for connecting the heating power supply 200.

[0055] The above shows and describes 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vacuum heating degassing pretreatment device, characterized in that: Include: A degassing container (100), wherein the degassing container (100) is provided with a vacuum exhaust port (111) and a material filling port which are communicated with the interior of the degassing container (100); and a heating device is provided inside the degassing container (100); A heating power source (200) electrically connected to the heating device; and A vacuum pumping assembly (400) comprising at least a vacuum gauge (410) arranged on the outer wall of the degassing container (100), and a vacuum unit (420) arranged 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) is capable of controlling the opening and closing of the vacuum unit (420) according to the vacuum degree signal fed back by the vacuum gauge (410), so that a stable vacuum degree can be maintained in the degassing container (100), thereby increasing the amount of gas released by the vacuum multilayer insulation material in the degassing container (100) when the heating device heats the degassing container (100).

2. The vacuum heating degassing pretreatment device according to claim 1, characterized in that: The material filling port is arranged at the top of the degassing container (100); a sealing cover (110) is detachably arranged on the material filling port, and the vacuum exhaust port (111) is arranged on the sealing cover (110).

3. The vacuum heating degassing pretreatment device according to claim 1, characterized in that: The heating power source (200) is electrically connected to a power source controller (210), and the power source controller (210) is capable of adjusting the magnitude of the current input from the heating power source (200) to the heating device.

4. The vacuum heating degassing pretreatment device according to claim 3, characterized in that: The invention also comprises: a temperature detection component (300); the temperature detection component (300) at least having a temperature transmitter (310); the temperature transmitter (310) being electrically connected to a temperature controller (320); and the temperature controller (320) being signal-connected to the power supply controller (210); and the temperature controller (320) being capable of adjusting the current input from the heating power supply (200) to the heating device according to a temperature signal inside the degassing container (100) fed back by the temperature detection component (300).

5. The vacuum heating degassing pretreatment device according to claim 1, characterized in that: The degassing container (100) comprises at least an outer cylinder (140) and an inner cylinder (130), wherein the inner cylinder (130) is rotatably arranged inside the outer cylinder (140); the material filling ports comprise a plurality of second material filling ports (141) arranged on the outer cylinder (140) and a plurality of third material filling ports (131) arranged on the inner cylinder (130), wherein the second material filling ports (141) and the third material filling ports (131) are matched with each other; and the vacuum exhaust port (111) is arranged on the outer cylinder (140), and the inner cylinder (130) is provided with a vacuum connecting port (135) matched with the vacuum exhaust port (111); wherein, when the vacuum exhaust port (111) is aligned with the vacuum connecting port (135), the second material filling port (141) and the third material filling port (131) are mutually offset, so that the interior of the degassing container (100) is sealed.

6. The vacuum heating degassing pretreatment device according to claim 5, characterized in that: An annular sliding groove (142) is provided at the bottom of the outer cylinder (140); a flange (136) is provided on the outer wall of the inner cylinder (130); a convex ring (132) is provided on the flange (136); the convex ring (132) is slidably embedded in the annular sliding groove (142), so that the outer cylinder (140) and the inner cylinder (130) can rotate relative to each other.

7. The vacuum heating degassing pretreatment device according to claim 5, characterized in that: A control box (150) is arranged below the outer cylinder (140); a worm wheel (137) is arranged at the bottom of the inner cylinder (130), and the worm wheel (137) extends into the control box (150); a worm (151) is arranged inside the control box (150), and the worm (151) is meshed with the worm wheel (137); and a hand wheel (152) is arranged at one end of the worm (151) extending outside the control box (150).

8. A vacuum heating degassing pretreatment method, characterized in that: Using the vacuum heating degassing pretreatment device according to any one of claims 1 to 7, the vacuum heating degassing pretreatment method comprises the following steps: S10. Loading the multilayer insulation material into the degassing container (100) through the material filling port, and closing the material filling port; S20. Setting the vacuum degree, starting the heating power supply (200), and heating the multi-layer insulation material through the heating device to release air; S30. Detecting the real-time vacuum degree in the degassing container (100), and controlling the start and stop of the vacuum unit (420) according to the difference between the real-time vacuum degree and the set vacuum degree.

9. The vacuum heating degassing pretreatment method according to claim 8, characterized in that: The step S20 further includes: setting a heating temperature; The vacuum heating degassing pretreatment method also includes: S40. detecting the real-time heating temperature in the degassing container (100), determining the difference between the real-time heating temperature and the set heating temperature, and controlling the current inputted into the heating device by the heating power supply (200) according to the difference between the real-time heating temperature and the set heating temperature, so as to adjust the real-time heating temperature in the degassing container (100); There is no fixed execution order for steps S30 and S40.

10. The vacuum heating degassing pretreatment method according to claim 8, characterized in that: The step S30 further comprises: 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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