Vacuum cup interlayer vacuumizing device and method

Abstract

The invention relates to the technical field of vacuum cup vacuumizing equipment, and discloses a vacuum cup interlayer vacuumizing device and method. The interlayer vacuumizing device comprises a negative pressure cylinder, a fixing sleeve, a scanning welding mechanism and a driving mechanism, a sealing cavity is formed in the negative pressure cylinder in a hollow mode, a transparent sealing plate used for sealing the sealing cavity is fixedly installed at one end of the negative pressure cylinder, and the sealing cavity communicates with an air inlet valve, a pre-vacuumizing system and a high vacuumizing system, the fixing sleeve is used for containing a vacuum cup to be vacuumized, and the scanning and welding mechanism is used for conducting scanning and laser welding on an air exhaust gap in the bottom of the vacuumized vacuum cup. The vacuum cup interlayer is good in vacuum pumping effect, high in vacuum pumping efficiency and short in processing period, sealing components such as an air exhaust tail pipe or a glass bead in the prior art do not need to be arranged at the bottom of the vacuum cup, the collision resistance of the vacuum cup can be effectively improved, the service life of the vacuum cup can be effectively prolonged, and the production cost is reduced. The equipment is low in manufacturing cost and low in energy consumption, and the production cost can be effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuuming equipment for thermos cups, and in particular relates to a vacuuming device and method for an interlayer of a thermos cup. Background Art

[0002] Currently, common thermos cups are generally vacuum thermos cups, which achieve the insulation function by vacuuming the interlayer between the inner liner and the outer shell to prevent heat loss. The insulation performance of the thermos cup is determined by the vacuum degree of the interlayer. The existing vacuuming process for thermos cups is generally divided into tail vacuum process and tailless vacuum process.

[0003] Among them, the tail vacuum process is to reserve a copper exhaust tail pipe at the bottom of the cup body, and extract the air in the interlayer of the thermos cup through this tail pipe. After reaching a certain vacuum degree, the copper tube is deformed and sealed with hydraulic pliers to achieve a sealed state; however, the tail vacuum process is difficult to completely ensure airtightness at the microscopic level. After long-term use, gas will gradually enter the interlayer of the thermos cup and destroy the vacuum state. The exhaust tail is exposed at the bottom of the cup body and is easily damaged by collision, which will also cause air intake, thereby causing the thermos cup to lose its thermal insulation performance.

[0004] The tailless vacuum process is to open a small hole in the center of the bottom of the cup body and place sealing materials such as glass beads. The thermos cup is then placed in a vacuum container such as a vacuum brazing furnace, evacuated and heated to 500-700℃ to melt the sealing material to seal the evacuation hole, thereby completing the evacuation and sealing. However, the sealing materials of the tailless vacuum process are expensive, the equipment is expensive, the processing cycle is long, and the energy consumption is high, resulting in high production costs. In addition, the sealing glass beads are easily broken by collision, which makes the interlayer of the thermos cup lose its thermal insulation performance. Summary of the Invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a vacuum pumping device and method for the interlayer of a thermos cup, which aims to solve the problem that the vacuum pumping equipment and vacuum pumping process of the existing vacuum thermos cup easily cause air to enter the interlayer and lose the thermal insulation performance when the vacuum cup is hit.

[0006] The first aspect of the present application provides a vacuum pumping device for an insulating cup interlayer, comprising: The negative pressure cylinder has a hollow structure with a sealed cavity inside. A transparent sealing plate for sealing the sealed cavity is fixedly installed at one end of the negative pressure cylinder. The sealed cavity is connected to an air inlet valve and a pre-evacuation system and a high-pressure extraction system for evacuating the sealed cavity; A fixed sleeve is detachably fixed to the end of the negative pressure cylinder away from the transparent sealing plate. The fixed sleeve is used to place the vacuum cup to be evacuated. At least one vacuum gap is opened at the bottom of the vacuum cup. The scanning welding mechanism is spaced apart on one side of the negative pressure cylinder where the transparent sealing plate is installed. The scanning welding mechanism is used to scan and laser weld the vacuum gap at the bottom of the vacuum cup through the transparent sealing plate. A driving mechanism, which is used to install the scanning welding mechanism and control the movement of the scanning welding mechanism to complete scanning and laser welding operations; When vacuuming, the thermos cup is placed in a fixed sleeve, the air inlet valve is closed, the bottom of the thermos cup is sealed with the sealed cavity, the interlayer of the thermos cup is connected with the sealed cavity through the vacuum gap, and the pre-vacuum system and the high-vacuum system vacuum the sealed cavity in turn.

[0007] In an optional solution, the negative pressure cylinder is provided with a first negative pressure tube and a second negative pressure tube communicating with the sealed cavity, the first negative pressure tube is communicated with the pre-extraction system, and the second negative pressure tube is communicated with the high-pressure extraction system; The pre-pumping system includes a pre-pumping pump and a pre-pumping valve. The pre-pumping pump is connected to the first negative pressure pipe through a pre-pumping pipe. The pre-pumping valve is connected between the first negative pressure pipe and the pre-pumping pipe. The pre-pumping pipe is connected to a first vacuum gauge. The high-pressure pump system includes a fore-stage pump, a high-pressure pump, a high-pressure negative pressure chamber, and a high-pressure valve. The fore-stage pump is connected to the high-pressure pump through a high-pressure pipe. The high-pressure pipe is connected to a second vacuum gauge. The high-pressure pump is connected to the high-pressure negative pressure chamber. The high-pressure valve is connected between the second negative pressure pipe and the high-pressure negative pressure chamber. The high-pressure negative pressure chamber is connected to a third vacuum gauge.

[0008] In an optional solution, more than two negative pressure cylinders may be provided; The pre-pumping system is provided with pre-pumping valves corresponding to the number of negative pressure cylinders. The first negative pressure pipe of each negative pressure cylinder is connected to a pre-pumping valve, and each pre-pumping valve is connected to the pre-pumping pipe. The high-pressure pump system is provided with high-pressure pump valves corresponding to the number of negative pressure cylinders. The second negative pressure pipe of each negative pressure cylinder is connected to a high-pressure pump valve, and each high-pressure pump valve is connected to the high-pressure negative pressure bin.

[0009] In an optional solution, the driving mechanism is a three-axis linear module composed of a first linear module, a second linear module, and a third linear module installed in sequence; Among them, the first linear module is used to control the scanning welding mechanism to move in the left and right direction, the second linear module is used to control the scanning welding mechanism to move in the up and down direction, and the third linear module is used to control the scanning welding mechanism to move in the front and back direction.

[0010] In an optional scheme, the scanning welding mechanism includes an industrial camera, a laser welding head, and a mounting frame. The mounting frame is fixedly mounted on the slider of the third linear module. The industrial camera and the laser welding head are fixedly mounted on the mounting frame at intervals, wherein the lens of the industrial camera is facing parallel to the axial direction of the negative pressure cylinder and can be directed toward the bottom of the thermos cup. The laser irradiation direction of the laser welding head is arranged at an angle to the axial direction of the negative pressure cylinder, and the laser of the laser welding head can be tilted to pass through the transparent sealing plate and irradiate the bottom of the thermos cup.

[0011] In an optional solution, a fill light source is installed on the mounting bracket corresponding to the lens of the industrial camera.

[0012] In an optional solution, the angle between the laser irradiation direction of the laser welding head and the axis of the negative pressure cylinder is not less than 5°.

[0013] In an optional solution, the vacuum pumping device for the interlayer of the thermos cup further includes: The frame, pre-extraction system and high-extraction system are arranged on the frame, and the driving mechanism is installed on the top of the frame; The bracket is vertically fixed on the top of the frame, and the negative pressure cylinder is fixed on the bracket.

[0014] In an optional solution, the negative pressure cylinder includes a sealing cylinder and a connecting cylinder, and the sealing cavity axially passes through the sealing cylinder and the connecting cylinder; One end of the sealing cylinder is fixedly mounted on the bracket, the transparent sealing plate is fixedly mounted on the end of the sealing cylinder away from the bracket, the connecting cylinder is located at the end of the sealing cylinder away from the transparent sealing plate and passes through the bracket, and the fixing sleeve is detachably fixed on the connecting cylinder.

[0015] In an optional solution, a high-temperature resistant coating is provided on the inner wall of the connecting cylinder.

[0016] In an optional solution, the fixing sleeve includes a sleeve and a sealing ring. The sleeve is generally a cylindrical structure with a hollow interior and open ends. The sleeve is detachably fixed to the outer end of the connecting tube of the negative pressure tube, and the sealing ring is partially embedded in the sleeve. When the sleeve is fixed to the negative pressure cylinder, the fixing sleeve and the negative pressure cylinder press the sealing ring tightly. During the vacuuming process, the outer edge of the bottom of the thermos cup presses the outer end surface of the sealing ring located inside the sleeve.

[0017] In an optional solution, the inner diameter of the sleeve is slightly larger than the outer diameter of the thermos cup. When the thermos cup is placed on the sleeve, the cup mouth of the thermos cup is arranged beyond the outer end of the fixed sleeve.

[0018] In an optional solution, the air intake valve, pre-pump, pre-pump valve, first vacuum gauge, front-stage pump, high-pressure pump, high-pressure valve, second vacuum gauge, third vacuum gauge, scanning welding mechanism, driving mechanism and controller are electrically controlled and connected.

[0019] A second aspect of the present application provides a method for vacuuming the interlayer of a thermos cup, using the aforementioned vacuuming device for the interlayer of the thermos cup. The method for vacuuming the interlayer of the thermos cup comprises at least the following steps: S1: Opening an air extraction gap: Opening at least one air extraction gap at the bottom of the thermos cup shell so that the interlayer of the thermos cup is connected to the outside through the air extraction gap; S2: Fixing the thermos cup: Place the thermos cup with the air extraction slit into the fixing sleeve with the bottom of the cup facing the negative pressure cylinder; S3: Vacuuming the interlayer: The controller closes the air inlet valve, and then the pre-vacuum system and the high-pressure vacuum system vacuum the sealed chamber and the interlayer of the thermos cup. At the same time, the first vacuum gauge, the second vacuum gauge, and the third vacuum gauge monitor the vacuum degree in the sealed chamber in real time, and send the vacuum degree information to the controller; S4: Vacuum gap scanning: When the vacuum degree in the sealed chamber reaches the high vacuum setting value, the controller controls the first linear module in the drive mechanism to drive the industrial camera to scan the vacuum gap at the bottom of the thermos cup and send the position and shape information of the vacuum gap to the controller; S5: Vacuum gap welding: The controller controls the first linear module and the second linear module in the drive mechanism according to the scanning information of the industrial camera in step S4 to drive the laser welding head to perform laser welding on the vacuum gap according to the position and shape of the vacuum gap, so that the interlayer of the thermos cup is sealed under vacuum; S6: Release the thermos cup: After welding is completed, close the pre-extraction valve and the high-extraction valve through the controller, and then open the air intake valve. The sealed chamber is connected to the outside air through the air intake valve to restore normal pressure to release the thermos cup, and then the thermos cup is manually removed from the fixed sleeve.

[0020] In an optional solution, in step S3, when the sealed cavity and the interlayer of the thermos cup are vacuumed, the front pump is started by the controller. When the second vacuum gauge detects that the vacuum degree in the high-vacuum pipe reaches the set value, the pre-vacuum pump and the high-vacuum pump are started by the controller, and the front pump, pre-vacuum pump, and high-vacuum pump are kept running. At the same time, the pre-vacuum valve and the high-vacuum valve are opened to perform pre-vacuuming. When the first vacuum gauge detects that the vacuum degree in the sealed cavity reaches the pre-vacuuming set value, the high-vacuum valve remains open and the pre-vacuum valve is closed to perform high-vacuuming. When the third vacuum gauge detects that the vacuum degree in the sealed chamber reaches the high-pressure pumping set value, the air inlet valve remains closed and the high-pressure pumping valve remains open, and step S5 is sequentially executed while maintaining the vacuum pumping state.

[0021] In an optional solution, in step S3, if the pre-vacuum time of the sealed cavity and the interlayer of the thermos cup exceeds the maximum time required for pre-vacuuming the thermos cup, and the vacuum degree in the sealed cavity still does not reach the pre-vacuum setting value, step S6 is directly executed.

[0022] In an optional solution, when there are more than two negative pressure cylinders, the workstations corresponding to each negative pressure cylinder respectively perform steps S2 to S6 in sequence.

[0023] In an optional solution, when two negative pressure cylinders are provided, the workstations corresponding to the two negative pressure cylinders respectively perform steps S2 to S6 in sequence, and when the workstation corresponding to one negative pressure cylinder performs steps S2 to S3, the workstation corresponding to the other negative pressure cylinder performs steps S4 to S6; When vacuuming the thermos cup on the fixed sleeve corresponding to a negative pressure cylinder, the controller closes the air inlet valve connected to the negative pressure cylinder, and simultaneously opens the pre-vacuum valve and the high-vacuum valve on the first negative pressure pipe and the second negative pressure pipe of the negative pressure cylinder, so that the pre-vacuum system and the high-vacuum system vacuum the sealed cavity of the negative pressure cylinder and the interlayer of the corresponding thermos cup; During this process, the controller controls the driving mechanism to drive the scanning welding mechanism to move to the work station corresponding to another negative pressure cylinder. The air intake valve connected to the other negative pressure cylinder remains closed, the pre-extraction valve is closed, and the high-extraction valve remains open. The scanning welding mechanism scans and welds the exhaust gap of the vacuum-evacuated thermos cup on the fixed sleeve corresponding to the other negative pressure cylinder. After welding is completed, the high-extraction valve is closed by the controller, and then the air intake valve is opened to release the thermos cup.

[0024] In an optional solution, in step S1, the air extraction gap opened at the bottom of the thermos cup shell is in the shape of a long strip or an arc.

[0025] Beneficial effects of this application: The present application sets a fixed sleeve for placing the thermos cup, sets a negative pressure cylinder and seals the sealed cavity constructed in the negative pressure cylinder through a transparent sealing plate, so that the sealed cavity and the thermos cup interlayer can be vacuumed through a pre-vacuum system and a high-vacuum system connected to the sealed cavity. The vacuuming effect of the thermos cup interlayer is good, the vacuuming efficiency is high, the processing cycle is short, the operation is simple, and the production efficiency is high.

[0026] The present application sets up a scanning welding mechanism to scan and laser weld the exhaust gap at the bottom of the thermos cup under a vacuum state, which has a good sealing effect on the exhaust gap. There is no need to set up sealing components such as exhaust tail pipes or glass beads at the bottom of the thermos cup as in the prior art. This avoids the problem that the thermos cup is easily hit by air intake in the interlayer and loses its thermal insulation performance when the exhaust tail pipe or glass beads are set in the prior art. It can effectively improve the anti-collision performance of the thermos cup and effectively extend the service life of the thermos cup. The equipment has low cost and low energy consumption, which can effectively reduce production costs.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of the vacuum pumping device for the interlayer of a thermos cup in one embodiment of the present application; Figure 2 This is a schematic diagram of the connection between the negative pressure cylinder, the pre-extraction system, and the high-extraction system in one embodiment of the present application; Figure 3 This is a schematic diagram of the structure and installation of a scanning welding mechanism and a driving mechanism in one embodiment of the present application; Figure 4 It is a top cross-sectional schematic diagram of the negative pressure cylinder and the fixed sleeve during vacuuming and a schematic diagram of the placement position of the thermos cup in one embodiment of the present application; Figure 5 Schematic diagram of the shape of the air extraction gap at the bottom of the thermos cup shell in one embodiment of the present application; wherein, Figure 5 (a) is a schematic diagram of a long strip of air extraction gap. Figure 5 (b) is a schematic diagram of the arc-shaped air extraction gap; Figure 6 This is a schematic diagram of the vacuuming process of the interlayer of a thermos cup in one embodiment of the present application.

[0030] Reference numerals in the figures: 1-negative pressure cylinder, 100-sealed chamber, 101-first negative pressure tube, 102-second negative pressure tube, 103-sealed cylinder, 104-connecting cylinder; 2-transparent sealing plate; 3-inlet valve; 4- pre-pumping system, 401- pre-pumping pump, 402- pre-pumping valve, 403- pre-pumping pipe, 404- first vacuum gauge; 5- high-pressure pump system, 501- foreline pump, 502- high-pressure pump, 503- high-pressure negative pressure chamber, 504- high-pressure pump valve, 505- high-pressure pump tube, 506- second vacuum gauge, 507- third vacuum gauge; 6-fixed sleeve, 601-sleeve, 602-sealing ring; 7-scanning welding mechanism, 701-industrial camera, 702-laser welding head, 703-mounting frame, 704-fill light source; 8-driving mechanism, 801-first linear module, 802-second linear module, 803-third linear module; 9-thermos cup, 901-exhaust gap; 10-rack; 11-bracket. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application and not all embodiments. All other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0032] 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 to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] In the present invention, the concept of "roughly" describes the main features of an overall structure or shape. When describing the shape of an object, this means that the object mainly presents a certain specific shape, but may differ in non-functional details. These detailed differences do not affect the overall characteristics and can therefore be classified as "roughly" a certain shape. For example, when describing a rectangular object, the expression "roughly rectangular" means that the overall shape of the object is round, but there are differences in certain non-functional details. Similarly, when describing a cube, the expression "roughly cubic" means that the overall shape of the object is a cube, but there are differences in certain non-functional details.

[0036] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0037] In the existing technology, the vacuum equipment and vacuum process of vacuum insulation cups have the problem that the vacuum insulation cup is easily hit by a collision, causing air to enter the interlayer of the vacuum insulation cup and lose its insulation performance. There are also problems such as expensive equipment cost, long processing cycle, high energy consumption and high production cost.

[0038] In response to the above problems, the present application makes improvements and innovations and proposes the following embodiments.

[0039] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown, the first aspect of the present application provides a vacuum extraction device for the interlayer of a thermos cup, comprising a negative pressure cylinder 1, a hollow structure with a sealed cavity 100 inside the negative pressure cylinder 1, a transparent sealing plate 2 for sealing the sealed cavity 100 fixedly installed at one end of the negative pressure cylinder 1, and the sealed cavity 100 is connected to an air inlet valve 3 and a pre-vacuum system 4 and a high-vacuum system 5 for vacuuming the sealed cavity 100; so that the sealed cavity 100 and the interlayer of the thermos cup 9 can be vacuumed by the pre-vacuum system 4 and the high-vacuum system 5, and the sealed cavity 100 can be connected to the outside air by opening the air inlet valve 3 after the vacuuming is completed, thereby releasing the pressure in the sealed cavity 100 to facilitate the removal of the thermos cup 9.

[0040] It includes a fixing sleeve 6, which is detachably fixed on the end of the negative pressure cylinder 1 away from the transparent sealing plate 2. The fixing sleeve 6 is used to place the thermos cup 9 to be vacuumed, and at least one vacuuming gap 901 is provided at the bottom of the thermos cup 9; so that the fixing sleeve 6 can support the thermos cup 9 before and after vacuuming, thereby facilitating accurate and rapid negative pressure adsorption of the thermos cup 9 during vacuuming, and can support the thermos cup 9 after vacuuming to prevent it from falling.

[0041] It includes a scanning welding mechanism 7 and a driving mechanism 8. The scanning welding mechanism 7 is arranged at intervals on one side of the negative pressure cylinder 1 where a transparent sealing plate 2 is installed. The scanning welding mechanism 7 is used to scan and laser weld the vacuum gap 901 at the bottom of the vacuumed thermos cup 9 through the transparent sealing plate 2. The driving mechanism 8 is used to install the scanning welding mechanism 7 and control the movement of the scanning welding mechanism 7 to complete the scanning and laser welding operations; so that the vacuum gap 901 at the bottom of the vacuumed thermos cup 9 can be scanned and laser welded when the sealed cavity 100 and the interlayer of the thermos cup 9 are in a vacuum state.

[0042] Among them, when vacuuming, the thermos cup 9 is placed in the fixed sleeve 6, the air inlet valve 3 is closed, the bottom of the thermos cup 9 is sealed with the sealed cavity 100, and the interlayer of the thermos cup 9 is connected with the sealed cavity 100 through the vacuum gap 901. The pre-vacuum system 4 and the high-vacuum system 5 vacuum the sealed cavity 100 in turn.

[0043] In this embodiment, the vacuum pumping device for the interlayer of the thermos cup also includes a frame 10 and a bracket 11. The pre-vacuum system 4 and the high-vacuum system 5 are arranged on the frame 10, the driving mechanism 8 is installed on the top of the frame 10, the bracket 11 is vertically fixed on the top of the frame 10, and the negative pressure cylinder 1 is fixed on the bracket 11.

[0044] In this way, by setting a fixed sleeve 6 for placing the thermos cup 9, by setting a negative pressure cylinder 1 and closing the sealed cavity 100 constructed in the negative pressure cylinder 1 through the transparent sealing plate 2, the sealed cavity 100 and the interlayer of the thermos cup 9 can be vacuumed through the pre-vacuum system 4 and the high-vacuum system 5 connected to the sealed cavity 100, and the vacuuming effect of the interlayer of the thermos cup 9 is good, the vacuuming efficiency is high, the processing cycle is short, the operation is simple, and the production efficiency is high.

[0045] By scanning and laser welding the exhaust gap 901 at the bottom of the thermos cup 9 under a vacuum state through the scanning welding mechanism 7, the exhaust gap 901 is well sealed, and there is no need to set sealing components such as exhaust tail pipes or glass beads at the bottom of the thermos cup 9 as in the prior art. This avoids the problem that the thermos cup 9 is easily hit by air inflow into the interlayer and loses its thermal insulation performance when the exhaust tail pipe or glass beads are set in the prior art. This can effectively improve the anti-collision performance of the thermos cup 9 and effectively extend the service life of the thermos cup 9. In addition, the equipment cost is low, the energy consumption is low, and the production cost can be effectively reduced.

[0046] In some embodiments, the negative pressure cylinder 1 is provided with a first negative pressure tube 101 and a second negative pressure tube 102 communicating with the sealed cavity 100, the first negative pressure tube 101 is communicated with the pre-pumping system 4, and the second negative pressure tube 102 is communicated with the high-pressure pumping system 5; wherein the pre-pumping system 4 includes a pre-pumping pump 401 and a pre-pumping valve 402, the pre-pumping pump 401 is communicated with the first negative pressure tube 101 through a pre-pumping tube 403, the pre-pumping valve 402 is communicated between the first negative pressure tube 101 and the pre-pumping tube 403, and the pre-pumping tube 403 is connected to the first negative pressure tube 101. It is connected to a first vacuum gauge 404; the high-pressure pump system 5 includes a front-stage pump 501, a high-pressure pump 502, a high-pressure negative pressure chamber 503, and a high-pressure valve 504. The front-stage pump 501 is connected to the high-pressure pump 502 through a high-pressure pipe 505. The high-pressure pipe 505 is connected to a second vacuum gauge 506. The high-pressure pump 502 is connected to a high-pressure negative pressure chamber 503. The high-pressure valve 504 is connected between the second negative pressure pipe 102 and the high-pressure negative pressure chamber 503. The high-pressure negative pressure chamber 503 is connected to a third vacuum gauge 507.

[0047] In this way, when the sealed cavity 100 and the interlayer of the thermos cup 9 are evacuated, pre-vacuuming and high-vacuuming can be performed successively through the pre-vacuuming system 4 and the high-vacuuming system 5 respectively, so that the vacuum degree of the interlayer of the thermos cup 9 meets the design requirements. Specifically, when evacuating, the front pump 501 is started by the controller. When the second vacuum gauge 506 detects that the vacuum degree in the high-evacuation tube 505 reaches the set value, the pre-evacuation pump 401 and the high-evacuation pump 502 are started by the controller, and the front pump 501, the pre-evacuation pump 401 and the high-evacuation pump 502 are kept running. At the same time, the pre-evacuation valve 402 and the high-evacuation valve 504 are opened by the controller to perform pre-evacuation. When the first vacuum gauge 404 detects that the vacuum degree in the sealed chamber 100 reaches the pre-evacuation set value, the high-evacuation valve 504 is controlled by the controller to remain open and the pre-evacuation valve 402 is closed to perform high-evacuation. When the third vacuum gauge 507 detects that the vacuum degree in the sealed chamber 100 reaches the high-evacuation set value, the air inlet valve 3 is controlled by the controller to remain closed and the high-evacuation valve 504 is controlled to remain open. When the sealed chamber 100 and the interlayer of the thermos cup 9 are in a vacuum state, the scanning and laser welding of the vacuum gap 901 at the bottom of the vacuumed thermos cup 9 can be completed.

[0048] It should be noted that the first vacuum gauge 404 is installed on the pre-vacuum pipe 403 and the third vacuum gauge 507 is installed on the high-vacuum negative pressure chamber 503, but since the pre-vacuum pipe 403, the high-vacuum negative pressure chamber 503 and the sealed chamber 100 are connected, the vacuum value detected by the first vacuum gauge 404 and the third vacuum gauge 507 is the real-time vacuum degree of the sealed chamber 100 and the interlayer of the thermos cup 9.

[0049] In some embodiments, more than two negative pressure cylinders 1 may be provided; correspondingly, the pre-pumping system 4 is provided with pre-pumping valves 402 corresponding to the number of negative pressure cylinders 1, and each negative pressure cylinder 1 is connected to a pre-pumping valve 402 on the first negative pressure pipe 101, and each pre-pumping valve 402 is connected to the pre-pumping pipe 403; correspondingly, the high-pumping system 5 is provided with high-pumping valves 504 corresponding to the number of negative pressure cylinders 1, and each negative pressure cylinder 1 is connected to a high-pumping valve 504 on the second negative pressure pipe 102, and each high-pumping valve 504 is connected to the high-pumping negative pressure chamber 503.

[0050] In this embodiment, two negative pressure cylinders 1 are provided. Thus, the pre-evacuation valve 402 and the high-evacuation valve 504 corresponding to the two negative pressure cylinders 1 can be controlled to be on and off respectively, so that the vacuuming process of the thermos cup 9 and the scanning welding process of the evacuation gap 901 on the two negative pressure cylinders 1 can be carried out alternately, thereby effectively improving production efficiency.

[0051] Specifically, when the vacuum cup 9 on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the left is evacuated, the air inlet valve 3 connected to the negative pressure cylinder 1 is closed by the controller, and the pre-evacuation valve 402 and the high-evacuation valve 504 on the first negative pressure tube 101 and the second negative pressure tube 102 of the negative pressure cylinder 1 are opened accordingly, so that the pre-evacuation system 4 and the high-evacuation system 5 evacuate the sealed cavity 100 of the negative pressure cylinder 1 and the interlayer of the corresponding thermos cup 9; in this process, the controller controls the driving mechanism 8 to drive the scanning welding mechanism 7 to move Move to the workstation corresponding to the negative pressure cylinder 1 on the right, control the air inlet valve 3 connected to the negative pressure cylinder 1 on the right to remain closed through the controller, close the pre-evacuation valve 402, and keep the high-evacuation valve 504 open, and use the scanning welding mechanism 7 to scan and weld the vacuum gap 901 of the vacuumed thermos cup 9 on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the right. After welding is completed, close the high-evacuation valve 504 through the controller, and then open the air inlet valve 3 to release the thermos cup 9, and then the welded thermos cup 9 can be manually taken out.

[0052] Subsequently, another vacuum-evacuated thermos cup 9 is placed on the fixed sleeve 6 corresponding to the right negative pressure cylinder 1 for the next round of vacuuming. At this time, the vacuum-evacuated thermos cup 9 on the fixed sleeve 6 corresponding to the left negative pressure cylinder 1 has been completed. The controller controls the driving mechanism 8 to drive the scanning welding mechanism 7 to move to the work station corresponding to the left negative pressure cylinder 1. The scanning welding mechanism 7 scans and welds the vacuuming gap 901 of the vacuum-evacuated thermos cup 9 on the fixed sleeve 6 corresponding to the left negative pressure cylinder 1, and repeats this process. In specific applications, multiple negative pressure cylinders 1 can also be set in one unit according to production needs.

[0053] In some embodiments, the driving mechanism 8 is a three-axis linear module composed of a first linear module 801, a second linear module 802, and a third linear module 803 installed in sequence; specifically, the first linear module 801 is horizontally fixedly installed on the top of the frame 10, the second linear module 802 is vertically fixedly installed on the slider of the first linear module 801, the third linear module 803 is horizontally fixedly installed on the slider of the second linear module 802, and the scanning welding mechanism 7 is fixedly installed on the slider of the third linear module 803.

[0054] Among them, the first linear module 801 is used to control the left-right movement of the scanning welding mechanism 7, the second linear module 802 is used to control the up-down movement of the scanning welding mechanism 7, and the third linear module 803 is used to control the front-back movement of the scanning welding mechanism 7. In this way, the first linear module 801, the second linear module 802, and the third linear module 803 can directly drive the scanning welding mechanism 7 to move flexibly in space. Therefore, the scanning welding mechanism 7, driven by the driving mechanism 8, can adapt to the position and shape of the exhaust slit 901 at the bottom of the thermos cup 9, thereby completing the scanning and laser welding process of the exhaust slit 901 at the bottom of the thermos cup 9.

[0055] In some embodiments, the scanning welding mechanism 7 includes an industrial camera 701, a laser welding head 702, and a mounting frame 703. The mounting frame 703 is fixedly mounted on the slider of the third linear module 803, and the industrial camera 701 and the laser welding head 702 are fixedly mounted on the mounting frame 703 at intervals.

[0056] Among them, the lens of the industrial camera 701 is facing parallel to the axial direction of the negative pressure cylinder 1 and can be directed towards the bottom of the thermos cup 9, so that the position and shape of the exhaust gap 901 at the bottom of the thermos cup 9 can be scanned by the industrial camera 701; in this embodiment, a fill light source 704 is installed on the mounting frame 703 corresponding to the lens of the industrial camera 701, so that the fill light source 704 can be used to fill light the bottom of the thermos cup 9 through the transparent sealing plate 2, so that the industrial camera 701 can clearly and accurately obtain the position and shape information of the exhaust gap 901.

[0057] Among them, the laser irradiation direction of the laser welding head 702 is arranged at an angle to the axial direction of the negative pressure cylinder 1, and the angle between the laser irradiation direction of the laser welding head 702 and the axis of the negative pressure cylinder 1 is not less than 5°. The laser of the laser welding head 702 can be tilted through the transparent sealing plate 2 to irradiate the bottom of the thermos cup 9; in this embodiment, the laser irradiation inclination angle of the laser welding head 702 is 8°. In this way, by making the laser of the laser welding head 702 irradiate the bottom of the thermos cup 9 in an inclined state, the laser of the laser welding head 702 has a certain incident angle and reflection angle, thereby effectively avoiding the reflected laser generated by direct laser irradiation from burning the laser welding head of the laser welding head 702; correspondingly, the transparent sealing plate 2 is made of transparent materials with a low refractive index such as high-purity quartz glass and borosilicate glass, so as to reduce laser reflection loss, improve energy transmittance, and reduce laser beam refraction and deflection, thereby improving welding positioning accuracy.

[0058] In some embodiments, the negative pressure cylinder 1 includes a sealing cylinder 103 and a connecting cylinder 104. The sealing cavity 100 is axially arranged to pass through the sealing cylinder 103 and the connecting cylinder 104. One end of the sealing cylinder 103 is fixedly mounted on the bracket 11. The transparent sealing plate 2 is fixedly mounted on the end of the sealing cylinder 103 facing away from the bracket 11. The connecting cylinder 104 is located at the end of the sealing cylinder 103 facing away from the transparent sealing plate 2 and passes through the bracket 11. The fixing sleeve 6 is detachably fixedly mounted on the connecting cylinder 104. In order to facilitate the horizontal fixed installation of the negative pressure cylinder 1 by installing the sealing cylinder 103 and the bracket 11, by making the fixing sleeve 6 and the connecting cylinder 104 detachable, during the production process, fixing sleeves 6 that can adapt to different specifications of the thermos cup 9 can be prefabricated. Therefore, according to the specifications of different thermos cups 9, the corresponding fixing sleeve 6 can be adaptively selected to place the thermos cup 9 of the corresponding specifications, thereby completing the vacuuming operation for thermos cups 9 of different specifications.

[0059] In some embodiments, a high-temperature resistant coating is provided on the inner wall of the connecting tube 104. Since the inner wall of the connecting tube 104 needs to be in close proximity to the laser of the laser welding head 702, the high-temperature resistant coating can protect the inner wall of the connecting tube 104. Specifically, the high-temperature resistant coating can be a metal oxide coating such as an aluminum oxide coating or a chromium oxide coating, or a metal ceramic coating such as an aluminum oxide-nickel coating or a chromium carbide-nickel chromium coating.

[0060] In some embodiments, the fixed sleeve 6 includes a sleeve 601 and a sealing ring 602. The sleeve 601 is roughly a cylindrical structure with a hollow interior and open ends. The sleeve 601 is detachably fixed to the outer end of the connecting tube 104 of the negative pressure tube 1, and the sealing ring 602 is partially embedded in the sleeve 601; when the sleeve 601 is fixed to the negative pressure tube 1, the fixed sleeve 6 and the negative pressure tube 1 press the sealing ring 602. During the vacuuming process, the outer edge of the bottom of the thermos cup 9 presses the outer end surface of the sealing ring 602 located inside the sleeve 601. In this way, by arranging a sealing ring 602 between the sleeve 601 and the connecting tube 104, on the one hand, the sealing ring 602 is pressed by the fixed sleeve 6 and the negative pressure tube 1, and the connecting gap between the sleeve 601 and the connecting tube 104 can be sealed by the sealing ring 602. On the other hand, during the vacuuming process, the outer edge of the bottom of the thermos cup 9 is pressed against the outer end face of the sealing ring 602 located inside the sleeve 601 through the negative pressure adsorption effect generated by the vacuuming, and the gap between the bottom of the thermos cup 9 and the fixed sleeve 6 can be sealed, thereby ensuring that during the vacuuming process, the sealing cavity 100 of the negative pressure tube 1 and the interlayer of the thermos cup 9 are in a state of isolation from the outside world, thereby effectively ensuring the vacuuming effect of the interlayer of the thermos cup 9.

[0061] In this embodiment, the sleeve 601 of the fixed sleeve 6 is connected to the outer end of the connecting tube 104 of the negative pressure tube 1 through a threaded connection. In this way, a better seal can be formed between the sleeve 601 and the connecting tube 104 through the threaded connection, which can further ensure the sealing between the fixed sleeve 6 and the negative pressure tube 1, and the threaded connection method is convenient for disassembly and assembly, and stable for installation. In specific applications, the installation between the fixed sleeve 6 and the negative pressure tube 1 can also be completed by radially penetrating the sleeve 601 to the connecting tube 104 with a screw.

[0062] In some embodiments, the inner diameter of the sleeve 601 is slightly larger than the outer diameter of the thermos cup 9. When the thermos cup 9 is placed on the sleeve 601, the cup mouth of the thermos cup 9 is positioned beyond the outer end of the fixing sleeve 6. In this way, the fixing sleeve 6 can support the thermos cup 9 before the vacuuming operation begins, so that when the vacuuming operation begins, the thermos cup 9 can be accurately and quickly adsorbed to the outer end surface of the portion of the sealing ring 602 located within the sleeve 601 under the action of the pre-vacuum system 4 and the high-pressure system 5. At the same time, after the vacuuming operation ends, the fixing sleeve 6 can stably support the thermos cup 9 to prevent the thermos cup 9 from falling after the negative pressure adsorption function is lost.

[0063] In some embodiments, the air intake valve 3, the pre-pump 401, the pre-pump valve 402, the first vacuum gauge 404, the front-stage pump 501, the high-pressure pump 502, the high-pressure valve 504, the second vacuum gauge 506, the third vacuum gauge 507, the scanning welding mechanism 7, and the driving mechanism 8 are electrically controlled and connected to the controller. In this way, the start and stop of each component in the vacuum pumping device and the opening and closing of each valve can be automatically controlled by the controller, thereby improving production efficiency.

[0064] The second aspect of the present application provides a vacuuming method for the interlayer of a thermos cup, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown, the above-mentioned vacuuming device for the interlayer of the thermos cup is used, and the vacuuming method for the interlayer of the thermos cup includes at least the following steps: S1: Opening an air extraction gap: Open at least one air extraction gap 901 at the bottom of the shell of the thermos cup 9, so that the interlayer of the thermos cup 9 is connected to the outside world through the air extraction gap 901; in this embodiment, the air extraction gap 901 at the bottom of the shell of the thermos cup 9 is long strip, such as Figure 5 As shown in (a), in specific applications, the air extraction gap 901 can also be in an arc shape, such as Figure 5 (b) S2: Fixing the thermos cup: Place the thermos cup 9 with the air extraction slit 901 into the fixing sleeve 6 with the bottom of the cup facing the negative pressure cylinder 1; S3: Vacuuming the interlayer: The controller closes the air inlet valve 3, and then the pre-vacuum system 4 and the high-pressure vacuum system 5 vacuum the sealed chamber 100 and the interlayer of the thermos cup 9. At the same time, the first vacuum gauge 404, the second vacuum gauge 506, and the third vacuum gauge 507 monitor the vacuum level in the sealed chamber 100 in real time, and send the vacuum level information to the controller; S4: Scanning the vacuum gap: When the vacuum level in the sealed chamber 100 reaches the high vacuum setting value, the controller controls the first linear module 801 in the drive mechanism 8 to drive the industrial camera 701 to scan the vacuum gap 901 at the bottom of the thermos cup 9, and sends the position and shape information of the vacuum gap 901 to the controller; S5: Vacuum gap welding: The controller controls the first linear module 801 and the second linear module 802 in the driving mechanism 8 according to the scanning information of the industrial camera 701 in step S4 to drive the laser welding head 702 to perform laser welding on the vacuum gap 901 according to the position and shape of the vacuum gap 901, so that the interlayer of the thermos cup 9 is sealed under vacuum; S6: Release the thermos cup: After welding is completed, close the pre-extraction valve 402 and the high-extraction valve 504 through the controller, and then open the air intake valve 3. The sealed cavity 100 is connected to the outside air through the air intake valve 3 to restore normal pressure and thereby release the thermos cup 9. Then, manually remove the thermos cup 9 from the fixed sleeve 6.

[0065] In some embodiments, in step S3, when the sealed chamber 100 and the interlayer of the thermos cup 9 are evacuated, the front pump 501 is started by the controller. When the second vacuum gauge 506 detects that the vacuum degree in the high-pressure pump 505 reaches the set value, the pre-pump 401 and the high-pressure pump 502 are started by the controller, and the front pump 501, the pre-pump 401, and the high-pressure pump 502 are kept running. At the same time, the pre-pump valve 402 and the high-pressure pump valve 504 are opened by the controller to perform pre-vacuuming. When the first vacuum gauge 404 detects that the vacuum degree in the high-pressure pump 505 reaches the set value, the pre-pump 401 and the high-pressure pump 502 are started by the controller. When the vacuum degree in the sealed cavity 100 reaches the pre-evacuation set value, the controller controls the high-evacuation valve 504 to remain open and the pre-evacuation valve 402 to close, so as to perform high-evacuation. When the third vacuum gauge 507 detects that the vacuum degree in the sealed cavity 100 reaches the high-evacuation set value, the controller controls the air inlet valve 3 to remain closed and the high-evacuation valve 504 to remain open. In this way, the scanning and laser welding of the evacuation gap 901 at the bottom of the vacuumed thermos cup 9 can be completed while the sealed cavity 100 and the interlayer of the thermos cup 9 are in a vacuum state. In this way, during the vacuuming process of the thermos cup 9, the pre-evacuation system 4 and the high-evacuation system 5 can be used to perform pre-evacuation and high-evacuation in succession, respectively, thereby effectively improving the vacuuming effect of the thermos cup 9 and ensuring that the vacuum degree of the interlayer of the thermos cup 9 meets the design requirements, thereby helping to improve the insulation effect of the thermos cup 9.

[0066] In the specific application, in step S3, the pre-vacuum time of the sealed cavity 100 and the interlayer of the thermos cup 9 is 4-15 seconds, the pre-vacuum setting value is 5×10-1Pa, and the high vacuum time of the sealed cavity 100 and the interlayer of the thermos cup 9 is 3-15 seconds, the high vacuum setting value is 5×10 -3 Pa-5×10 -4 Pa, in step S5, the laser welding time for the vacuum gap 901 of the thermos cup 9 is 3-5 seconds; specifically, for thermos cups 9 of different specifications, the pre-vacuum time, high vacuum time, high vacuum setting value, and laser welding time are adaptively adjusted according to the specifications of the thermos cup 9 and the vacuum requirements.

[0067] In some embodiments, in step S3, if the pre-vacuum time of the sealed cavity 100 and the interlayer of the thermos cup 9 exceeds the maximum time required for pre-vacuuming the thermos cup 9, and the vacuum degree in the sealed cavity 100 still does not reach the pre-vacuum setting value, step S6 is directly executed.

[0068] Specifically, assuming that a certain thermos cup 9 requires 5-6 seconds to pre-vacuum it to a pre-vacuum setting value of 5×10-1Pa, that is, the maximum time required for pre-vacuuming the thermos cup 9 is 6 seconds. Therefore, for the vacuuming operation of the thermos cup 9, in step S3, if the pre-vacuuming time of the sealed cavity 100 and the interlayer of the thermos cup 9 exceeds 6 seconds, and the vacuum degree in the sealed cavity 100 still does not reach the pre-vacuum setting value, it means that the sealing performance of the thermos cup 9 itself is poor and the thermos cup 9 is defective, so step S6 is directly executed to release the thermos cup 9. In this way, the sealing effect of the thermos cup 9 itself can be judged by the pre-vacuuming time, thereby achieving the purpose of testing the quality of the thermos cup 9 and detecting whether the thermos cup 9 is qualified.

[0069] In some embodiments, when there are more than two negative pressure cylinders 1 , the workstations corresponding to each negative pressure cylinder 1 respectively perform steps S2 to S6 in sequence.

[0070] In this embodiment, the vacuuming device is provided with two negative pressure cylinders 1. At this time, the workstations corresponding to the two negative pressure cylinders 1 respectively execute steps S2 to S6 in sequence, and when the workstation corresponding to one negative pressure cylinder 1 executes steps S2 to S3, the workstation corresponding to the other negative pressure cylinder 1 executes steps S4 to S6, so that the vacuuming process of the thermos cup 9 on the two negative pressure cylinders 1 and the scanning welding process of the exhaust gap 901 are performed alternately, thereby effectively improving production efficiency.

[0071] Specifically, when the vacuum cup 9 on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the left is evacuated, that is, when step S3 is executed, the air inlet valve 3 connected to the negative pressure cylinder 1 is closed by the controller, and the pre-evacuation valve 402 and the high-evacuation valve 504 on the first negative pressure tube 101 and the second negative pressure tube 102 of the negative pressure cylinder 1 are opened accordingly, so that the pre-evacuation system 4 and the high-evacuation system 5 evacuate the sealed cavity 100 of the negative pressure cylinder 1 and the interlayer of the corresponding thermos cup 9; in this process, the controller controls the driving mechanism 8 to drive the scanning welding mechanism 7 to move to the negative pressure cylinder 1 on the right side. At the workstation corresponding to the pressure cylinder 1, the controller controls the air inlet valve 3 connected to the negative pressure cylinder 1 on the right to remain closed, the pre-extraction valve 402 is closed, and the high-extraction valve 504 is kept open. The scanning welding mechanism 7 scans and welds the exhaust gap 901 of the vacuum-evacuated thermos cup 9 on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the right, that is, executes steps S4 and S5. After welding is completed, the high-extraction valve 504 is closed by the controller, and then the air inlet valve 3 is opened to release the thermos cup 9. The welded thermos cup 9 can then be manually taken out, that is, executes step S6.

[0072] Subsequently, another thermos cup 9 to be evacuated is placed on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the right side for the next round of vacuuming operation, that is, step S2 is executed. At this time, the thermos cup 9 on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the left side has completed vacuuming, and the controller controls the driving mechanism 8 to drive the scanning welding mechanism 7 to move to the work station corresponding to the negative pressure cylinder 1 on the left side. The scanning welding mechanism 7 scans and welds the vacuum gap 901 of the thermos cup 9 on the fixed sleeve 6 corresponding to the negative pressure cylinder 1 on the left side, and repeats this process.

[0073] Finally, it should be noted that although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention, and all should be included in the scope of protection of this application.

Claims

1. A vacuum pumping device for the interlayer of a thermos cup, characterized in that: include: A negative pressure cylinder (1), wherein the negative pressure cylinder (1) is hollow and has a sealed cavity (100), a transparent sealing plate (2) for sealing the sealed cavity (100) is fixedly mounted on one end of the negative pressure cylinder (1), and the sealed cavity (100) is connected to an air inlet valve (3) and a pre-evacuation system (4) and a high-pressure evacuation system (5) for evacuating the sealed cavity (100); A fixed sleeve (6), the fixed sleeve (6) being detachably fixedly mounted on an end of the negative pressure cylinder (1) facing away from the transparent sealing plate (2), the fixed sleeve (6) being used to place a vacuum-insulated cup (9), the bottom of the vacuum-insulated cup (9) being provided with at least one air extraction slit (901); a scanning welding mechanism (7), the scanning welding mechanism (7) being spaced apart on a side of the negative pressure cylinder (1) on which the transparent sealing plate (2) is installed, the scanning welding mechanism (7) being used to scan and laser weld the vacuum gap (901) at the bottom of the vacuumed thermos cup (9) through the transparent sealing plate (2); A driving mechanism (8), the driving mechanism (8) being used to install the scanning welding mechanism (7) and control the movement of the scanning welding mechanism (7) to complete scanning and laser welding operations; When vacuuming, the thermos cup (9) is placed in the fixed sleeve (6), the air inlet valve (3) is closed, the bottom of the thermos cup (9) and the sealed cavity (100) are sealed, the interlayer of the thermos cup (9) is connected to the sealed cavity (100) through the vacuum gap (901), and the pre-vacuum system (4) and the high-vacuum system (5) vacuumize the sealed cavity (100) in turn.

2. The vacuum pumping device for the interlayer of a thermos cup according to claim 1, characterized in that: The negative pressure cylinder (1) is provided with a first negative pressure tube (101) and a second negative pressure tube (102) which are in communication with the sealed cavity (100); the first negative pressure tube (101) is in communication with the pre-extraction system (4), and the second negative pressure tube (102) is in communication with the high-pressure extraction system (5); The pre-pumping system (4) comprises a pre-pumping pump (401) and a pre-pumping valve (402); the pre-pumping pump (401) is connected to the first negative pressure pipe (101) via a pre-pumping pipe (403); the pre-pumping valve (402) is connected between the first negative pressure pipe (101) and the pre-pumping pipe (403); and the pre-pumping pipe (403) is connected to a first vacuum gauge (404); The high-pressure pump system (5) includes a front-stage pump (501), a high-pressure pump (502), a high-pressure negative pressure chamber (503), and a high-pressure valve (504). The front-stage pump (501) is connected to the high-pressure pump (502) via a high-pressure pipe (505). The high-pressure pipe (505) is connected to a second vacuum gauge (506). The high-pressure pump (502) is connected to the high-pressure negative pressure chamber (503). The high-pressure valve (504) is connected between the second negative pressure pipe (102) and the high-pressure negative pressure chamber (503). The high-pressure negative pressure chamber (503) is connected to a third vacuum gauge (507).

3. The vacuum pumping device for the interlayer of a thermos cup according to claim 2, characterized in that: More than two negative pressure cylinders (1) may be provided; The pre-pumping system (4) is provided with pre-pumping valves (402) corresponding to the number of negative pressure cylinders (1), and the first negative pressure pipe (101) of each negative pressure cylinder (1) is connected to a pre-pumping valve (402), and each pre-pumping valve (402) is connected to a pre-pumping pipe (403). The high-pressure extraction system (5) is provided with high-pressure extraction valves (504) corresponding to the number of negative pressure cylinders (1), and the second negative pressure pipe (102) of each negative pressure cylinder (1) is connected to a high-pressure extraction valve (504), and each high-pressure extraction valve (504) is connected to a high-pressure extraction negative pressure chamber (503).

4. The vacuum pumping device for the interlayer of a thermos cup according to claim 1, characterized in that: The driving mechanism (8) is a three-axis linear module composed of a first linear module (801), a second linear module (802), and a third linear module (803) installed in sequence; The first linear module (801) is used to control the scanning welding mechanism (7) to move in the left-right direction, the second linear module (802) is used to control the scanning welding mechanism (7) to move in the up-down direction, and the third linear module (803) is used to control the scanning welding mechanism (7) to move in the front-back direction.

5. The vacuum pumping device for the interlayer of a thermos cup according to claim 4, characterized in that: The scanning welding mechanism (7) includes an industrial camera (701), a laser welding head (702), and a mounting frame (703), wherein the mounting frame (703) is fixedly mounted on the slider of the third linear module (803), and the industrial camera (701) and the laser welding head (702) are fixedly mounted on the mounting frame (703) at intervals, wherein the lens of the industrial camera (701) is oriented parallel to the axial direction of the negative pressure cylinder (1) and can be directed toward the bottom of the thermos cup (9), the laser irradiation direction of the laser welding head (702) is arranged at an angle to the axial direction of the negative pressure cylinder (1), and the laser of the laser welding head (702) can be tilted through the transparent sealing plate (2) and irradiated on the bottom of the thermos cup (9).

6. The vacuum pumping device for the interlayer of a thermos cup according to claim 5, characterized in that: A fill light source (704) is installed on the mounting frame (703) corresponding to the lens of the industrial camera (701).

7. The vacuum pumping device for the interlayer of a thermos cup according to claim 5, characterized in that: The angle between the laser irradiation direction of the laser welding head (702) and the axis of the negative pressure cylinder (1) is not less than 5°.

8. The vacuum pumping device for the interlayer of a thermos cup according to claim 1, characterized in that: Also includes: A frame (10), the pre-extraction system (4) and the high-extraction system (5) are arranged on the frame (10), and the driving mechanism (8) is installed on the top of the frame (10); A bracket (11), wherein the bracket (11) is vertically fixedly mounted on the top of the frame (10), and the negative pressure cylinder (1) is fixedly mounted on the bracket (11).

9. The vacuum pumping device for the interlayer of a thermos cup according to claim 8, characterized in that: The negative pressure cylinder (1) comprises a sealing cylinder (103) and a connecting cylinder (104), and the sealing cavity (100) is arranged to axially penetrate the sealing cylinder (103) and the connecting cylinder (104); One end of the sealing cylinder (103) is fixedly mounted on the bracket (11); the transparent sealing plate (2) is fixedly mounted on the end of the sealing cylinder (103) facing away from the bracket (11); the connecting cylinder (104) is located at the end of the sealing cylinder (103) facing away from the transparent sealing plate (2) and is arranged to pass through the bracket (11); and the fixing sleeve (6) is detachably fixedly mounted on the connecting cylinder (104).

10. The vacuum pumping device for the interlayer of a thermos cup according to claim 9, characterized in that: A high-temperature resistant coating is provided on the inner wall of the connecting cylinder (104).

11. The vacuum pumping device for the interlayer of a thermos cup according to claim 9, characterized in that: The fixing sleeve (6) comprises a sleeve (601) and a sealing ring (602); the sleeve (601) is generally a cylindrical structure with a hollow interior and open ends; the sleeve (601) is detachably fixedly mounted on the outer end of the connecting tube (104) of the negative pressure tube (1); and the sealing ring (602) is partially embedded in the sleeve (601); When the sleeve (601) is fixed to the negative pressure cylinder (1), the fixing sleeve (6) and the negative pressure cylinder (1) press the sealing ring (602). During the vacuuming process, the outer edge of the bottom of the thermos cup (9) presses the outer end surface of the sealing ring (602) located inside the sleeve (601).

12. The vacuum pumping device for the interlayer of a thermos cup according to claim 11, characterized in that: The inner diameter of the sleeve (601) is slightly larger than the outer diameter of the thermos cup (9). When the thermos cup (9) is placed on the sleeve (601), the cup mouth of the thermos cup (9) is arranged beyond the outer end of the fixed sleeve (6).

13. The vacuum pumping device for the interlayer of a thermos cup according to claim 2, characterized in that: The air inlet valve (3), the pre-pump (401), the pre-pump valve (402), the first vacuum gauge (404), the front-stage pump (501), the high-pump pump (502), the high-pump valve (504), the second vacuum gauge (506), the third vacuum gauge (507), the scanning welding mechanism (7), and the driving mechanism (8) are electrically controlled and connected to the controller.

14. A vacuuming method for the interlayer of a thermos cup, characterized by: The vacuum evacuation device for the interlayer of the thermos cup according to any one of claims 1 to 13 is used, and the vacuum evacuation method for the interlayer of the thermos cup comprises at least the following steps: S1: Opening an air extraction gap: Opening at least one air extraction gap (901) at the bottom of the outer shell of the thermos cup (9), so that the interlayer of the thermos cup (9) is connected to the outside through the air extraction gap (901); S2: Fixing the thermos cup: placing the thermos cup (9) with the air extraction gap (901) into the fixing sleeve (6) with the bottom of the cup facing the negative pressure cylinder (1); S3: Vacuuming the interlayer: the air inlet valve (3) is closed by the controller, and then the sealed cavity (100) and the interlayer of the thermos cup (9) are vacuumed by the pre-vacuum system (4) and the high-vacuum system (5). At the same time, the vacuum degree in the sealed cavity (100) is monitored in real time by the first vacuum gauge (404), the second vacuum gauge (506), and the third vacuum gauge (507), and the vacuum degree information is sent to the controller; S4: Scanning the vacuum gap: When the vacuum degree in the sealed cavity (100) reaches a high vacuum setting value, the controller controls the first linear module (801) in the driving mechanism (8) to move so as to drive the industrial camera (701) to scan the vacuum gap (901) at the bottom of the thermos cup (9), and sends the position and shape information of the vacuum gap (901) to the controller; S5: Vacuum gap welding: The controller controls the first linear module (801) and the second linear module (802) in the driving mechanism (8) to operate according to the scanning information of the industrial camera (701) in step S4, so as to drive the laser welding head (702) to perform laser welding on the vacuum gap (901) according to the position and shape of the vacuum gap (901), so that the interlayer of the thermos cup (9) is sealed in a vacuum state; S6: Release the thermos cup: After welding is completed, the pre-extraction valve (402) and the high-extraction valve (504) are closed by the controller, and then the air inlet valve (3) is opened. The sealed cavity (100) is connected to the outside air through the air inlet valve (3) to restore the normal pressure, thereby releasing the thermos cup (9), and then manually removing the thermos cup (9) from the fixing sleeve (6).

15. The vacuuming method for the interlayer of a thermos cup according to claim 14, characterized in that: In step S3, when the sealed chamber (100) and the interlayer of the thermos cup (9) are vacuumed, the front pump (501) is started by the controller. When the second vacuum gauge (506) detects that the vacuum degree in the high-pressure pump tube (505) reaches the set value, the pre-pump (401) and the high-pressure pump (502) are started by the controller, and the front pump (501), the pre-pump (401), and the high-pressure pump (502) are kept running. At the same time, the pre-pump valve (402) and the high-pressure pump valve (504) are opened to perform pre-vacuuming. When the first vacuum gauge (404) detects that the vacuum degree in the sealed chamber (100) reaches the pre-vacuuming set value, the high-pressure pump valve (504) remains open and the pre-pump valve (402) is closed to perform high-pressure vacuuming. When the third vacuum gauge (507) detects that the vacuum degree in the sealed chamber (100) reaches the high-vacuum setting value, the air inlet valve (3) remains closed and the high-vacuum valve (504) remains open, and step S5 is sequentially executed while maintaining the vacuum state.

16. The vacuuming method for the interlayer of a thermos cup according to claim 15, characterized in that: In step S3, if the pre-vacuuming time of the sealed cavity (100) and the interlayer of the thermos cup (9) exceeds the maximum time required for the pre-vacuuming of the thermos cup (9), and the vacuum degree in the sealed cavity (100) still does not reach the pre-vacuuming set value, step S6 is directly executed.

17. The vacuuming method for the interlayer of a thermos cup according to claim 14, characterized in that: When more than two negative pressure cylinders (1) are provided, the workstation corresponding to each negative pressure cylinder (1) respectively performs steps S2 to S6 in sequence.

18. The vacuuming method for the interlayer of a thermos cup according to claim 17, characterized in that: When two negative pressure cylinders (1) are provided, the workstations corresponding to the two negative pressure cylinders (1) respectively perform steps S2 to S6 in sequence, and when the workstation corresponding to one negative pressure cylinder (1) performs steps S2 to S3, the workstation corresponding to the other negative pressure cylinder (1) performs steps S4 to S6; When vacuuming the thermos cup (9) on the fixed sleeve (6) corresponding to a negative pressure cylinder (1), the air inlet valve (3) connected to the negative pressure cylinder (1) is closed by the controller, and the pre-evacuation valve (402) and the high-evacuation valve (504) on the first negative pressure tube (101) and the second negative pressure tube (102) of the negative pressure cylinder (1) are opened accordingly, so that the pre-evacuation system (4) and the high-evacuation system (5) evacuate the sealed cavity (100) of the negative pressure cylinder (1) and the interlayer of the corresponding thermos cup (9); During this process, the controller controls the driving mechanism (8) to drive the scanning welding mechanism (7) to move to the workstation corresponding to the other negative pressure cylinder (1), the air inlet valve (3) connected to the other negative pressure cylinder (1) remains closed, the pre-evacuation valve (402) is closed, and the high-evacuation valve (504) remains open. The scanning welding mechanism (7) scans and welds the evacuation gap (901) of the vacuum-evacuated thermos cup (9) on the fixed sleeve (6) corresponding to the other negative pressure cylinder (1). After welding is completed, the high-evacuation valve (504) is closed by the controller, and then the air inlet valve (3) is opened to release the thermos cup (9).

19. The vacuuming method for the interlayer of a thermos cup according to claim 14, characterized in that: In step S1, the air extraction gap (901) provided at the bottom of the shell of the thermos cup (9) is in the shape of a long strip or an arc.

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