A vacuum laser welding device

Abstract

This invention discloses a vacuum laser welding apparatus, relating to the field of vacuum laser welding technology. The invention includes a base frame and a protective chamber disposed on the upper surface of the base frame, and further includes: an adjusting shaft rotatably connected to the lower side of the protective chamber; a welding drive assembly disposed inside the protective chamber, with a rotating mechanism disposed on one side inside the protective chamber; a laser welding assembly fixed to the output end of the welding drive assembly; a base chamber fixed to the lower surface of the base frame, with a lifting assembly disposed inside the base chamber; and a vacuum pump disposed inside the base chamber, with a vacuum port fixed to its output end. This invention allows for adjustment of the position of the protective chamber via the adjusting shaft, enabling sealing of the protective chamber through the cooperation of a sealing groove and a sealing protrusion. Furthermore, the tilt angle of the welding drive assembly can be adjusted via the rotating mechanism, thereby allowing control of the tilt angle of the laser welding assembly according to the different specifications and dimensions of the workpiece.

Description

Technical Field

[0001] This invention belongs to the field of vacuum laser welding technology, and in particular relates to a vacuum laser welding device. Background Technology

[0002] Vacuum brazing refers to the heating of a workpiece within a vacuum chamber, primarily used for welding products requiring high quality and easily oxidized materials. A vacuum brazing furnace comprises a pressure vessel with cylindrical sidewalls and a door, the door's size and position designed to close one end of the cylindrical sidewall. A workpiece handling system, mounted on the pressure vessel door, supports the metal workpiece for heat treatment or brazing. This system includes a device for rotating the workpiece during processing. A vacuum system can be connected to the workpiece, ensuring that the internal pressure is below atmospheric pressure during brazing.

[0003] Laser welding is a welding method that uses a focused laser beam as an energy source to bombard the workpiece and generate heat. It is mainly used for welding metal workpieces with high precision and high sealing requirements, such as aerospace precision components and medical devices. However, in daily use, workpieces of different sizes and shapes are often encountered. Existing vacuum laser welding equipment has difficulty controlling the welding tilt angle according to the different workpieces, and the workpiece clamping and welding path adjustment flexibility is insufficient, making it difficult to quickly clamp and limit the workpiece. As a result, the applicable scope of laser welding equipment is greatly reduced. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a vacuum laser welding device that can effectively solve the problems of the prior art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a vacuum laser welding apparatus, comprising a base frame and a protective chamber disposed on the upper surface of the base frame, and further comprising:

[0007] Adjust the rotating shaft, which is rotatably connected to the lower side of the protective chamber. The protective chamber has a semi-circular cross-section and is rotatably connected to the base frame.

[0008] The welding drive assembly is located inside the protective chamber. A rotating mechanism is located on one side of the protective chamber, and one end of the rotating mechanism is connected to the welding drive assembly.

[0009] The laser welding assembly is fixed at the output end of the welding drive assembly;

[0010] The base compartment is fixed to the lower end of the base frame. The base compartment is equipped with a lifting component, and the upper end of the lifting component is equipped with a locking component for clamping and limiting the workpiece.

[0011] A vacuum pump is arranged inside the base bin. A vacuum port is fixed to the output end of the vacuum pump, and the vacuum port is located on the upper end surface of the base frame on both the left and right sides.

[0012] Furthermore, a protective ring is fixed to the upper end surface of the base frame, and the cross-section of the protective ring is in a "mouth" - shaped structure. A sealing groove is provided on the upper end surface of the protective ring, and a carrier frame is fixed at the central position of the upper end surface of the base frame.

[0013] Furthermore, a sealing convex block is fixed to the lower end of the inner wall of the protective bin, and the sealing convex block is slidably embedded in the sealing groove. An observation bin is provided on the front side of the protective bin, and the center of the observation bin is made of a transparent material. A handle part is fixed to the side of the protective bin away from the adjusting rotating shaft.

[0014] Furthermore, the rotating mechanism includes a servo motor, a worm rod, a worm gear, a connecting rod, a driving disc, and a carrier plate. The servo motor is fixed on one side of the protective bin, the worm rod is fixed to the output end of the servo motor, the worm gear is meshed and connected to the lower end of the worm rod, the connecting rod is fixed to one end of the worm gear, and the connecting rod is rotationally connected to the protective bin. The driving disc is fixed to the end of the connecting rod away from the worm gear, and the carrier plate is fixed to one end of the driving disc.

[0015] Furthermore, positioning sliders are symmetrically fixed to the upper end surface of the carrier plate, and the cross-section of the positioning slider is in a "T" - shaped structure. A positioning chute is provided on the inner wall of the protective bin, and the positioning slider swings left and right along the inside of the positioning chute for adjustment.

[0016] Furthermore, the welding driving component includes a disassembly slider, a disassembly chute, and positioning bolts. The disassembly slider is fixed to the upper end surface of the welding driving component, the disassembly chute is provided on the inner side of the carrier plate, the positioning bolts are symmetrically arranged on both the left and right sides of the disassembly slider, and the positioning bolts pass through the disassembly slider and are connected to the carrier plate.

[0017] Furthermore, the lifting component includes a driving motor, a connecting screw rod, a lifting platform, lifting rods, clamping plates, and clamping chutes. The driving motor is fixed at the central position inside the base bin, the connecting screw rod is fixed to the output end of the driving motor, the lifting platform is threadedly connected to the outer surface of the connecting screw rod, the lifting rods are symmetrically fixed to both the left and right sides of the lifting platform, and the cross-section of the lifting rod is in a quadrilateral structure and penetrates through the upper end surface of the carrier frame. The clamping plates are fixed to the upper ends of the lifting rods, and the clamping chutes are provided on the upper end surfaces of the clamping plates.

[0018] Furthermore, the locking component includes a locking plate, a locking ring, a driving rack, a driving gear, and a driving button. The locking plate is slidably clamped inside the clamping chute, the locking ring is fixed to one end of the locking plate, the driving rack is fixed to one side of the locking plate, the driving gear is meshed and connected to the lower end of the driving rack, and one side of the driving gear is rotationally connected to one end of the clamping plate. The driving button is fixed to one end of the driving gear.

[0019] Furthermore, the locking plate has a "T" shaped cross-section and slides along the inside of the clamping plate. The locking ring is fixed to one end of the locking plate, and the locking ring has an "L" shaped cross-section.

[0020] Furthermore, the vacuum pump includes an elastic tube and a guide tube. The elastic tube is fixed at the output end of the vacuum pump, and the guide tube is connected to the upper end of the elastic tube and connected to the vacuum port.

[0021] The present invention has the following beneficial effects:

[0022] This invention allows for the adjustment of the protective chamber's position via an adjustable rotating shaft. This, combined with a sealing groove and a sealing protrusion, seals the protective chamber. Furthermore, a rotating mechanism adjusts the tilt angle of the welding drive assembly, enabling control over the tilt angle according to the workpiece's dimensions. This expands the equipment's applicability. The drive motor and connecting screw within the base chamber then move the clamping plate up and down, working in conjunction with the locking assembly to quickly lock the workpiece. The adjustable position of the locking plate allows for customization based on the workpiece's dimensions. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. 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 effort.

[0024] Figure 1 This is a top view schematic diagram of the vacuum laser welding device of the present invention;

[0025] Figure 2 This is a bottom view schematic diagram of the vacuum laser welding device of the present invention;

[0026] Figure 3 This is a rear view schematic diagram of the vacuum laser welding device of the present invention;

[0027] Figure 4 This is a top view of the base frame of the present invention;

[0028] Figure 5 This is a bottom view of the protective compartment of the present invention;

[0029] Figure 6 This is a top view of the rotating mechanism of the present invention;

[0030] Figure 7 This is a bottom view of the rotating mechanism of the present invention;

[0031] Figure 8 This is a schematic diagram of the interior of the base compartment of the present invention;

[0032] Figure 9 This is a top view of the locking assembly of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Base frame; 101. Protective ring; 102. Sealing groove; 103. Bearing frame; 2. Protective chamber; 201. Adjusting shaft; 202. Sealing protrusion; 203. Observation chamber; 204. Handle component; 3. Rotating mechanism; 301. Servo motor; 302. Worm gear component; 303. Worm wheel component; 304. Connecting rod; 305. Drive disk; 306. Bearing plate; 307. Positioning slider; 308. Positioning groove; 4. Welding drive assembly; 401. Disassembly slider; 4 02. Positioning slide; 403. Positioning bolt; 5. Laser welding assembly; 6. Base compartment; 601. Drive motor; 602. Connecting screw; 603. Lifting platform; 604. Lifting rod; 605. Clamping plate; 606. Clamping slide; 7. Locking assembly; 701. Locking plate; 702. Locking ring; 703. Drive rack; 704. Drive gear; 705. Drive button; 8. Vacuum pump; 801. Elastic tube; 802. Guide tube; 803. Vacuum port. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Please see Figure 1-9 As shown, the present invention is a vacuum laser welding device, including a base frame 1 and a protective chamber 2 disposed on the upper end surface of the base frame 1, and further comprising:

[0037] Adjust the rotating shaft 201, which is rotatably connected to the lower side of the protective chamber 2. The protective chamber 2 has a semi-circular cross-section and is rotatably connected to the base frame 1. A protective ring 101 is fixed to the upper end face of the base frame 1. The protective ring 101 has a "U"-shaped cross-section and a sealing groove 102 is provided on the upper end face of the protective ring 101. A bearing frame 103 is fixed at the center of the upper end face of the base frame 1. The protective ring 101 can protect the protective chamber 2. Then, the sealing groove 102 can engage with the sealing protrusion 202 on the inner wall of the protective chamber 2, which can prevent the sealing protrusion 202 from shifting or shaking. Since the sealing protrusion 202 can be embedded in the sealing groove 102, it can ensure that the protective chamber 2 The sealing effect between the protective chamber 2 and the base frame 1; a sealing protrusion 202 is fixed at the lower end of the inner wall of the protective chamber 2, and the sealing protrusion 202 slides into the sealing groove 102. An observation chamber 203 is provided on the front side of the protective chamber 2, and the center of the observation chamber 203 is made of transparent material. A handle 204 is fixed on the side of the protective chamber 2 away from the adjustment shaft 201. The transparent material in the center of the observation chamber 203 makes it convenient for workers to observe the welding status of the workpiece. Then, the handle 204 can cooperate with the adjustment shaft 201 to open the protective chamber 2, which makes it convenient for workers to disassemble the workpiece, etc. The semi-circular protective chamber 2 and the sealing groove 102 provide double sealing, and the vacuum maintenance time is ≥2h.

[0038] Welding drive assembly 4 is installed inside the protective chamber 2. A rotating mechanism 3 is located on one side of the protective chamber 2, and one end of the rotating mechanism 3 is connected to the welding drive assembly 4. The rotating mechanism 3 includes a servo motor 301, a worm gear 302, a worm wheel 303, a connecting rod 304, a drive disk 305, and a support plate 306. The servo motor 301 is fixed to one side of the protective chamber 2, the worm gear 302 is fixed to the output end of the servo motor 301, the worm wheel 303 is meshed with the lower end of the worm gear 302, and the connecting rod 304 is fixed to one end of the worm wheel 303. 04 is rotatably connected to the protective chamber 2. The drive disk 305 is fixed to the end of the connecting rod 304 away from the worm gear 303. The bearing plate 306 is fixed to one end of the drive disk 305. The servo motor 301 can drive the worm gear 302 to rotate. When the worm gear 302 rotates, it can drive the worm gear 303 to rotate. When the worm gear 303 rotates, it can drive the drive disk 305 to rotate through the connecting rod 304, thereby driving the bearing plate 306 to swing along the inner side of the protective chamber 2. The upper end surface of the bearing plate 306 is symmetrically fixed with positioning sliders 307, and the positioning sliders are fixed to the upper end surface of the bearing plate 306. The positioning slider 307 has a "T"-shaped cross-section. A positioning groove 308 is provided on the inner wall of the protective chamber 2. The positioning slider 307 swings left and right along the inside of the positioning groove 308. By sliding and engaging the positioning slider 307 within the positioning groove 308, the position of the support plate 306 can be limited, preventing displacement and shaking of the support plate 306, thus ensuring its stability. The welding drive assembly 4 includes a disassembly slider 401, a disassembly groove 402, and positioning bolts 403. The disassembly slider 401 is fixed to the welding drive assembly. On the upper surface of component 4, a disassembly groove 402 is opened on the inner side of the support plate 306. Positioning bolts 403 are symmetrically arranged on the left and right sides of the disassembly slider 401, and the positioning bolts 403 pass through the disassembly slider 401 and are connected to the support plate 306. The disassembly slider 401 can be slidably engaged in the inner side of the disassembly groove 402, so that the welding drive component 4 can be quickly installed and disassembled, so as to facilitate subsequent maintenance and upkeep. Then, the positioning bolts 403 pass through the disassembly slider 401 and are connected to the support plate 306, which can ensure the stability of the support plate 306.

[0039] Laser welding assembly 5 is fixed to the output end of welding drive assembly 4; base chamber 6 is fixed to the lower end face of base frame 1, and a lifting assembly is provided inside the base chamber 6. A locking assembly 7 is provided at the upper end of the lifting assembly for clamping and limiting the workpiece; the lifting assembly includes a drive motor 601, a connecting screw 602, a lifting platform 603, a lifting rod 604, a clamping plate 605, and a clamping slide 606. The drive motor 601 is fixed in the center of the base chamber 6, the connecting screw 602 is fixed to the output end of the drive motor 601, the lifting platform 603 is threaded to the outer surface of the connecting screw 602, and the lifting rod 604... The lifting rod 604 is symmetrically fixed on the left and right sides of the lifting platform 603. The cross-section of the lifting rod 604 is a quadrilateral structure and extends through the upper end face of the support frame 103. The clamping plate 605 is fixed on the upper end face of the lifting rod 604. The clamping groove 606 is opened on the upper end face of the clamping plate 605. The drive motor 601 can drive the connecting screw 602 to rotate. When the connecting screw 602 rotates, it can drive the lifting platform 603 to slide up and down. When the lifting platform 603 is adjusted downward, the clamping plate 605 can be pulled down by the lifting rod 604, so that it can cooperate with the locking component 7 to clamp the workpiece.

[0040] The locking assembly 7 includes a locking plate 701, a locking ring 702, a drive rack 703, a drive gear 704, and a drive button 705. The locking plate 701 is slidably engaged with the inner side of the clamping groove 606. The locking ring 702 is fixed to one end of the locking plate 701. The drive rack 703 is fixed to one side of the locking plate 701. The drive gear 704 is meshed with the lower end of the drive rack 703, and one side of the drive gear 704 is rotatably connected to one end of the clamping plate 605. The drive button 705 is fixed to one end of the drive gear 704. The clamping groove 606 can clamp and limit the locking plate 701, preventing the locking plate 701 from shifting or shaking. The drive button 705 can drive... The drive gear 704 rotates, and when the drive gear 704 rotates, it can mesh with the drive rack 703, which in turn can drive the locking plate 701 to slide left and right. Thus, the workpiece can be locked and constrained by the locking ring 702. The locking ring 702 is suitable for irregularly shaped workpieces, and the clamping time is <30s. The cross-section of the locking plate 701 is a "T" shaped structure and slides along the inside of the clamping plate 605. The locking ring 702 is fixed to one end of the locking plate 701, and the cross-section of the locking ring 702 is an "L" shaped structure. By setting the locking ring 702 to an "L" shaped structure, it can engage with the side of the workpiece, thereby locking the workpiece and preventing the workpiece from shifting or shaking.

[0041] A vacuum pump 8 is installed inside the base chamber 6. The output end of the vacuum pump 8 is fixed with a vacuum port 803, which is located on the left and right sides of the upper end face of the base frame 1. The vacuum pump 8 includes an elastic tube 801 and a guide tube 802. The elastic tube 801 is fixed to the output end of the vacuum pump 8, and the guide tube 802 is connected to the upper end of the elastic tube 801 and is connected to the vacuum port 803. The vacuum pump 8 can extract the air in the protective chamber 2 through the guide tube 802 and the vacuum port 803. It can cooperate with the rotating mechanism 3, the welding drive assembly 4 and the laser welding assembly 5 to weld the workpiece. Since the laser welding assembly 5 supports X / Y / Z three-axis linkage, the path programming error is ≤0.1mm.

[0042] Working principle: First, place the base frame (1) in the designated position. Pull the handle 204 to open the protective chamber 2 by adjusting the rotating shaft 201. Then, place the workpiece on the upper end of the support frame 103 and turn the drive button 705. The drive button 705 can drive the drive gear 704 to rotate. When the drive gear 704 rotates, it can mesh with the drive rack 703, which can drive the locking plate 701 to slide left and right. Thus, the workpiece can be locked and limited by the locking ring 702. The locking ring 702 is suitable for irregularly shaped workpieces. The clamping time is less than 30 seconds. Since the locking ring 702 has an "L" shaped structure, it can remain perpendicular to the side of the workpiece. Then, the drive motor 601 is turned on. When the drive motor 601 is turned on, it can drive the connecting screw 602 to rotate, thereby pulling the lifting platform 603 down. The lifting platform 603 can be adjusted up and down. When the lifting platform 603 is adjusted down, the clamping plate 605 can be pulled down through the lifting rod 604, so that the locking ring 702 can be engaged with the workpiece, thereby locking the workpiece.

[0043] Secondly, after closing the protective chamber 2 by adjusting the rotating shaft 201, the set sealing groove 102 can be engaged with the sealing protrusion 202 on the inner wall of the protective chamber 2, which can prevent the sealing protrusion 202 from shifting or shaking. Since the sealing protrusion 202 can be embedded in the sealing groove 102, the sealing effect between the protective chamber 2 and the base frame 1 can be guaranteed. Then, the vacuum pump 8 is turned on. The set vacuum pump 8 can extract the air in the protective chamber 2 through the guide pipe 802 and the vacuum port 803, so that the protective chamber 2 is in a vacuum state. Since the center of the observation chamber 203 is made of transparent material, it is convenient for the staff to observe the welding of the workpiece.

[0044] Finally, the welding drive assembly 4 is activated. This assembly adjusts the position of the laser welding assembly 5, enabling welding of the workpiece. Then, the servo motor 301 is activated. When the worm gear 302 rotates, it drives the worm wheel 303 to rotate. When the worm wheel 303 rotates, it drives the drive disk 305 to rotate via the connecting rod 304, causing the support plate 306 to swing along the inner side of the protective chamber 2. Because the laser welding assembly 5 supports X / Y / Z three-axis linkage with a path programming error ≤0.1mm, when the support plate... When the 306 swings left and right, the positioning slider 307 can slide and engage inside the positioning groove 308, thus limiting the position of the support plate 306 and preventing it from shifting or shaking, thereby ensuring the stability of the support plate 306. At the same time, the disassembly slider 401 can slide and engage inside the disassembly groove 402, allowing for quick installation and disassembly of the welding drive assembly 4, facilitating subsequent maintenance and upkeep. Then, the positioning bolt 403 passes through the disassembly slider 401 and connects to the support plate 306, ensuring the stability of the support plate 306.

[0045] The above are merely preferred embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present invention.

Claims

1. A vacuum laser welding apparatus, comprising a base frame (1) and a protective chamber (2) disposed on the upper end face of the base frame (1), characterized in that, it further comprises... include: Adjust the rotating shaft (201), which is rotatably connected to the lower end of the protective chamber (2), and the protective chamber (2) has a semi-circular cross-section and is rotatably connected to the base frame (1); Welding drive assembly (4) is set inside the protective chamber (2). A rotating mechanism (3) is set on one side inside the protective chamber (2), and one end of the rotating mechanism (3) is connected to the welding drive assembly (4). Laser welding assembly (5) is fixed at the output end of the welding drive assembly (4). Base chamber (6) is fixed on the lower end face of the base frame (1). A lifting assembly is set inside the base chamber (6). A locking assembly (7) is set at the upper end of the lifting assembly for clamping and limiting the workpiece. Vacuum pump (8) is set inside the base chamber (6). A vacuum port (803) is fixed at the output end of the vacuum pump (8), and the vacuum port (803) is located on the left and right sides of the upper end face of the base frame (1). The rotating mechanism (3) includes a servo motor (301), a worm gear (302), a worm wheel (303), a connecting rod (304), a drive disk (305), and a support plate (306). The servo motor (301) is fixed to one side of the protective chamber (2). The worm gear (302) is fixed to the output end of the servo motor (301). The worm wheel (303) is meshed with the lower end of the worm gear (302). The connecting rod (304) is fixed to one end of the worm wheel (303) and is rotatably connected to the protective chamber (2). The drive disk (305) is fixed to the connecting rod (306). 04) At the end away from the worm gear (303), the bearing plate (306) is fixed to one end of the drive disk (305); the welding drive assembly (4) includes a disassembly slider (401), a disassembly groove (402) and a positioning bolt (403). The disassembly slider (401) is fixed to the upper end face of the welding drive assembly (4), the disassembly groove (402) is opened on the inner side of the bearing plate (306), and the positioning bolt (403) is symmetrically arranged on the left and right sides of the disassembly slider (401), and the positioning bolt (403) passes through the disassembly slider (401) and is connected to the bearing plate (306); The lifting assembly includes a drive motor (601), a connecting screw (602), a lifting platform (603), a lifting rod (604), a clamping plate (605), and a clamping groove (606). The drive motor (601) is fixed in the center of the base chamber (6). The connecting screw (602) is fixed at the output end of the drive motor (601). The lifting platform (603) is threaded to the outer surface of the connecting screw (602). The lifting rod (604) is symmetrically fixed on the left and right sides of the lifting platform (603). The cross-section of the lifting rod (604) is a quadrilateral structure and penetrates through the upper end face of the support frame (103). The clamping plate (605) is fixed on the upper end face of the lifting rod (604). The clamping groove (606) is opened on the upper end face of the clamping plate (605). The locking component (7) includes a locking plate (701), a locking collar (702), a driving rack (703), a driving gear (704) and a driving knob (705). The locking plate (701) is slidably clamped inside the clamping chute (606). The locking collar (702) is fixed at one end of the locking plate (701). The driving rack (703) is fixed on one side of the locking plate (701). The driving gear (704) is meshed and connected to the lower end of the driving rack (703), and one side of the driving gear (704) is rotatably connected to one end of the clamping plate (605). The driving knob (705) is fixed at one end of the driving gear (704).

2. The vacuum laser welding apparatus according to claim 1, characterized in that, A protective ring (101) is fixed on the upper end surface of the base frame (1), and the cross-section of the protective ring (101) is in a "mouth" - shaped structure. A sealing groove (102) is formed on the upper end surface of the protective ring (101). A carrier frame (103) is fixed at the central position of the upper end surface of the base frame (1).

3. The vacuum laser welding apparatus according to claim 2, characterized in that, A sealing protrusion (202) is fixed at the lower end of the inner wall of the protective chamber (2), and the sealing protrusion (202) is slidably inserted into the sealing groove (102). An observation chamber (203) is arranged on the front side of the protective chamber (2), and the center of the observation chamber (203) is made of a transparent material. A handle part (204) is fixed on one side of the protective chamber (2) away from the adjusting rotating shaft (201).

4. The vacuum laser welding apparatus according to claim 1, characterized in that, Positioning sliders (307) are symmetrically fixed on the upper end surface of the carrier plate (306), and the cross-section of the positioning sliders (307) is in a "T" - shaped structure. Positioning chutes (308) are formed on the inner wall of the protective chamber (2), and the positioning sliders (307) swing left and right along the inside of the positioning chutes (308) for adjustment.

5. A vacuum laser welding apparatus according to claim 1, characterized in that, The cross-section of the locking plate (701) is in a "T" - shaped structure and is slidably connected along the inside of the clamping plate (605). The locking collar (702) is fixed at one end of the locking plate (701), and the cross-section of the locking collar (702) is in an "L" - shaped structure.

6. The vacuum laser welding apparatus according to claim 1, characterized in that, The vacuum pump (8) includes an elastic tube (801) and a guiding tube (802). The elastic tube (801) is fixed at the output end of the vacuum pump (8). The guiding tube (802) is connected to the upper end of the elastic tube (801), and the guiding tube (802) is connected to the vacuum port (803).

Images