Vacuum liquid suction device for alkaline battery

Abstract

The utility model relates to the technical field of battery production, in particular to an alkaline battery vacuum liquid suction device which comprises a base, a battery holder and a vacuum pump which are mounted on the base, a support component mounted on the base, a beam frame component mounted on the support component, and a lifting component and a driving component which are mounted on the beam frame component, a transmission assembly is mounted on the beam frame assembly, a channel switching assembly is mounted on the beam frame assembly, and the transmission assembly is used for controlling the channel switching assembly to open or close a channel between the beam frame assembly and the vacuum pump; a gas transmission assembly and a discharging rod are mounted on the support assembly, and the gas transmission assembly is used for controlling the discharging rod to stretch out or retract back in the support assembly; the lifting, opening and closing operation of the vacuum cover is matched with the gas transmission assembly to control the discharging rod to move, the treated alkaline battery can be automatically replaced after vacuum liquid suction, and rapid feeding and discharging are completed in cooperation with an automatic feeding machine, and manual replacement is not needed.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and in particular to a vacuum liquid suction device for alkaline batteries. Background Technology

[0002] During the production of alkaline batteries, after the electrolyte is injected into the battery, it needs to be absorbed by the positive electrode ring and the separator. Since absorption is slow under normal pressure, vacuum is generally used for liquid absorption to enable the injected electrolyte to be absorbed quickly.

[0003] However, existing alkaline battery liquid removal technology generally involves vacuuming one battery at a time, replacing the original battery, and then processing the replacement battery. The entire battery replacement process either uses manual operation, which leads to low production efficiency, or it uses an electrical control method with robots, but this method is unstable and prone to failure. Moreover, the leakage that may occur during battery processing poses a significant threat to electronic signal components.

[0004] Therefore, to address the above issues, a device can be designed that can simultaneously equip two batteries for sequential liquid aspiration, and automatically replace the batteries after liquid aspiration is completed, thereby improving liquid aspiration efficiency and making operation more stable. Utility Model Content

[0005] To overcome the problems of low efficiency in manually replacing alkaline batteries and the susceptibility to malfunctions in robotic gripping and replacement methods.

[0006] The technical solution of this utility model is as follows: an alkaline battery vacuum liquid suction device, including a base, a battery holder mounted on the base, and a vacuum pump, further including a support assembly mounted on the base, a beam frame assembly mounted on the support assembly, a lifting assembly and a drive assembly mounted on the beam frame assembly. The input end of the lifting assembly is connected to the output end of the drive assembly, and the drive assembly is used to drive the lifting assembly to move vertically. The vacuum pump is connected to the beam frame assembly through a pipe, and the vacuum pump extracts gas from the lifting assembly through the beam frame assembly and the pipe. A signal transmission assembly is installed on the lifting assembly, and a transmission assembly is installed on the beam frame assembly. The signal transmission assembly is used to send signals to the transmission assembly. A channel conversion assembly is installed on the beam frame assembly, and the input end of the channel conversion assembly is connected to the output end of the transmission assembly. The transmission assembly is used to control the channel conversion assembly to open or close the channel between the beam frame assembly and the vacuum pump. A gas supply assembly and a discharge rod are installed on the support assembly. The gas supply assembly is used to control the discharge rod to extend or retract within the support assembly. When the lifting assembly moves upward, the discharge rod extends from the support assembly; when the lifting assembly moves downward, the discharge rod retracts into the support assembly.

[0007] Preferably, the support assembly includes a seat chamber mounted on the base, an air chamber mounted on the seat chamber, and an air cylinder; the beam frame assembly includes a connecting frame mounted on the air chamber, a base plate mounted on the connecting frame, a slide cylinder mounted on the base plate, a top plate mounted on the slide cylinder, a crossbeam mounted between adjacent top plates, and an air extraction channel mounted on the top plate. The air extraction channel is connected to the slide cylinder, the slide cylinder is connected to the lifting assembly, and a vacuum pump is connected to the air extraction channel through a pipe.

[0008] Preferably, the lifting assembly includes an air passage movably connected inside the slide cylinder, a vacuum cover and a partition mounted on the air passage, a guide rod and a screw sleeve mounted on the partition, the guide rod being slidably connected to the base plate, the vacuum cover being above the battery holder, and the vacuum cover covering the battery holder when the vacuum cover moves down onto the base; the signal transmission assembly includes a tension spring with one end connected to the screw sleeve, a tension sensor mounted on the other end of the tension spring, the tension sensor being mounted on the top plate, and the tension sensor being used to detect the tension value of the tension spring.

[0009] Preferably, the drive assembly includes a screw movably connected to the top plate at one end, a secondary flat gear fixedly connected to the other end of the screw, a primary motor mounted on the connecting frame, a power bevel gear mounted on the output end of the primary motor, a primary bevel gear meshing with the power bevel gear, a primary flat gear fixedly mounted on the primary bevel gear, and a toothed belt meshing with the primary flat gear and the secondary flat gear. The primary flat gear is movably connected to the air chamber. The primary motor is used to drive the power bevel gear to rotate, the power bevel gear is used to drive the primary bevel gear and the primary flat gear to rotate, the primary flat gear and the toothed belt are used to drive the secondary flat gear and the screw to rotate, and a screw sleeve is threadedly connected to the screw, which is used to drive the screw sleeve to move in the vertical direction.

[0010] Preferably, the gas delivery assembly includes a first inflation pipe connected to the gas chamber at one end, a plunger movably connected to the gas chamber, and a lifting frame mounted on the plunger. The lifting frame is fixedly connected between two adjacent threaded sleeves. A second inflation pipe is connected to the gas cylinder at one end, and a gas cover is fixedly connected to the other end of the second inflation pipe. The gas cover is disposed between the partition and the bottom plate. When the lifting frame moves downward, the plunger moves in the gas chamber and causes the gas in the gas chamber to flow into the gas cylinder. The unloading rod moves along the gas cylinder and extends out of the gas cylinder. When the partition moves upward, the plunger moves in the gas chamber and causes the gas in the gas chamber to flow into the gas cylinder. The unloading rod moves along the gas cylinder and retracts into the gas cylinder.

[0011] Preferably, the transmission assembly includes a second motor mounted on the crossbeam, a primary transmission gear mounted on the output end of the second motor, a connecting rod movably connected to the crossbeam, a secondary transmission gear mounted on the connecting rod, and a primary transmission bevel gear. The second motor is used to drive the primary transmission gear to rotate, the primary transmission gear meshes with the secondary transmission gear, and drives the secondary transmission gear, connecting rod, and primary transmission bevel gear to rotate.

[0012] Preferably, the channel switching assembly includes a ball valve movably connected in the air extraction channel and a secondary transmission bevel gear fixedly mounted on the ball valve. The secondary transmission bevel gear meshes with a corresponding primary transmission bevel gear. The primary transmission bevel gear is used to drive the secondary transmission bevel gear and the ball valve to rotate. The ball valve is used to control the opening or closing of the corresponding air extraction channel. When the ball valve opens the corresponding air extraction channel, the other ball valve closes the corresponding air extraction channel.

[0013] The beneficial effects of this utility model are:

[0014] 1. By controlling the movement of the unloading rod through the lifting and closing operation of the vacuum hood and the gas conveying component, the alkaline batteries that have been processed can be automatically replaced after vacuum liquid suction. With the help of the automatic feeder, the loading and unloading can be completed quickly without the need for manual replacement.

[0015] 2. The movement of the unloading bar is entirely based on a mechanical transmission structure that combines lifting and air supply components. This structure is relatively stable in operation, has low manufacturing costs, and is less prone to failure compared to electrical automation control methods.

[0016] 3. By moving the lifting component, the signal transmission component feeds back a signal to the transmission component, which can simultaneously rotate the ball valves in the two evacuation channels, thereby opening one evacuation channel and closing the other evacuation channel, so that the vacuum pump can sequentially perform evacuation operations on different alkaline batteries. Attached Figure Description

[0017] Figure 1 The diagram shown is a cross-sectional view of the alkaline battery vacuum liquid suction device of this utility model.

[0018] Figure 2 The diagram shown is a three-dimensional structural schematic of the alkaline battery vacuum liquid suction device of this utility model.

[0019] Figure 3 The diagram shown is another three-dimensional structural schematic of the alkaline battery vacuum liquid suction device of this utility model.

[0020] Figure 4 The diagram shown is a schematic representation of the lifting assembly of the alkaline battery vacuum liquid suction device of this utility model.

[0021] Figure 5 The diagram shown is a schematic representation of the drive assembly of the alkaline battery vacuum liquid suction device of this utility model.

[0022] Figure 6 The diagram shown is a schematic representation of the transmission assembly of the alkaline battery vacuum liquid suction device of this utility model.

[0023] Figure 7 This invention relates to a vacuum liquid suction device for alkaline batteries. Figure 1Enlarged structural diagram of point A in the middle;

[0024] Figure 8 This invention relates to a vacuum liquid suction device for alkaline batteries. Figure 1 Enlarged structural diagram of point B in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Base; 2. Battery holder; 301. Seat compartment; 302. Air chamber; 303. Air cylinder; 401. Crossbeam; 402. Top plate; 403. Slide cylinder; 404. Bottom plate; 405. Connecting frame; 406. Air extraction channel; 501. Air passage; 502. Vacuum hood; 503. Partition plate; 504. Guide rod; 505. Screw sleeve; 601. Screw; 602. Secondary spur gear; 603. Main spur gear; 604. Main bevel gear; 605. Toothed belt; 606. Motor No. 1; 607. Power bevel gear; 701. Tension spring; 702. Tension sensor; 801. Lifting frame; 802. Plunger; 803. No. 1 air inlet pipe; 901. Air cover; 902. No. 2 air inlet pipe; 903. Unloading rod; 1001. Motor No. 2; 1002. Primary transmission gear; 1003. Connecting rod; 1004. Secondary transmission gear; 1005. Primary transmission bevel gear; 1101. Ball valve; 1102. Secondary transmission bevel gear. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Please see Figures 1-8This utility model provides an embodiment of an alkaline battery vacuum suction device, comprising a base 1, a battery holder 2 mounted on the base 1, and a vacuum pump. It also includes a support assembly mounted on the base 1, a beam frame assembly mounted on the support assembly, a lifting assembly, and a drive assembly mounted on the beam frame assembly. The input end of the lifting assembly is connected to the output end of the drive assembly, which drives the lifting assembly to move vertically. The vacuum pump is connected to the beam frame assembly via a pipe, and the vacuum pump extracts gas from the lifting assembly through the beam frame assembly and the pipe. A signal transmission assembly is mounted on the lifting assembly, and a transmission assembly is mounted on the beam frame assembly. The signal transmission assembly sends a signal to the transmission assembly. A channel conversion assembly is mounted on the beam frame assembly, with its input end connected to the output end of the transmission assembly. The transmission assembly controls the channel conversion assembly to open or close the channel between the beam frame assembly and the vacuum pump. A gas supply assembly and a discharge rod 903 are mounted on the support assembly. The gas supply assembly controls the discharge rod 903 to extend or retract within the support assembly. When the lifting assembly moves upward, the discharge rod 903... The material rod 903 extends from the support assembly; when the lifting assembly moves downward, the unloading rod 903 retracts into the support assembly. The conveyor (existing technology, not shown in the figure) transports the alkaline batteries to different battery holders 2. Then, the drive assembly is activated to control the lifting assembly to move downward, covering the corresponding battery holder 2 (cooperating with the base 1 to seal the battery holder 2 and the alkaline battery). Then, the vacuum pump (existing technology, not shown in the figure) is activated to extract the gas from the lifting assembly through the beam frame assembly, creating a vacuum environment around the alkaline battery. Under vacuum, after the electrolyte in the battery is completely absorbed, a signal is sent to the transmission assembly through the signal transmission assembly. The control channel conversion assembly opens the beam frame assembly that was originally closed and closes the beam frame assembly that was originally open. The vacuum pump is activated again to perform the above vacuuming operation. After the liquid absorption is completed, the lifting assembly moves upward, and at the same time, the gas supply assembly inputs gas into the support assembly, causing the unloading rod 903 to extend and push the corresponding battery onto another conveyor (existing technology, not shown in the figure).

[0028] Please see Figures 3-5In this embodiment, the support assembly includes a seat 301 mounted on the base 1, an air chamber 302 mounted on the seat 301, and an air cylinder 303; the beam frame assembly includes a connecting frame 405 mounted on the air chamber 302, a base plate 404 mounted on the connecting frame 405, a slide cylinder 403 mounted on the base plate 404, a top plate 402 mounted on the slide cylinder 403, a crossbeam 401 mounted between adjacent top plates 402, and an air extraction channel 406 mounted on the top plate 402. The air extraction channel 406 communicates with the slide cylinder 403, and the slide cylinder 403 communicates with the lifting assembly. A vacuum pump is connected to the air extraction channel 406 through a pipe; the lifting assembly includes The air passage 501 is movably connected within the slide 403, the vacuum cover 502 and the partition 503 are mounted on the air passage 501, and the guide rod 504 and the screw sleeve 505 are mounted on the partition 503. The guide rod 504 is slidably connected to the base plate 404. The vacuum cover 502 is located above the battery holder 2. When the vacuum cover 502 moves downward to the base 1, the vacuum cover 502 covers the battery holder 2. The signal transmission component includes a tension spring 701 with one end connected to the screw sleeve 505, and a tension sensor 702 mounted on the other end of the tension spring 701. The tension sensor 702 is mounted on the top plate 402 and is used to detect the tension value of the tension spring 701.The drive assembly includes a screw 601 movably connected at one end to the top plate 402, a secondary flat gear 602 fixedly connected to the other end of the screw 601, a primary motor 606 mounted on the connecting frame 405, a power bevel gear 607 mounted on the output end of the primary motor 606, a main bevel gear 604 meshing with the power bevel gear 607, a main flat gear 603 fixedly mounted on the main bevel gear 604, and a drive assembly meshing with the main flat gear 603 and the secondary flat gear 602. The toothed belt 605 and the main spur gear 603 are movably connected to the air chamber 302. Motor 606 drives the power bevel gear 607 to rotate. The power bevel gear 607 drives the main bevel gear 604 and the main spur gear 603 to rotate. The main spur gear 603 and the toothed belt 605 drive the auxiliary spur gear 602 and the screw 601 to rotate. A threaded sleeve 505 is threaded onto the screw 601. The screw 601 drives the threaded sleeve 505 to move vertically. After the alkaline batteries are conveyed to the battery holder 2 by the conveyor, the first motor 606 is started. The rotating power bevel gear 607 outputs power to the main bevel gear 604, causing the main spur gear 603, which is fixed to the main bevel gear 604, to rotate. The meshing toothed belt 605 and the auxiliary spur gear 602 meshing with the toothed belt 605 rotate continuously. The auxiliary spur gear 602 then drives the corresponding screw 601 to rotate. Through the threaded transmission principle, the screw sleeve 505 on the screw 601 moves up and down. When the screw sleeve 505 moves upward, the vacuum cover 502 moves away from the base 1. When the screw sleeve 505 moves downward, the vacuum cover 502 moves closer to the base 1 until it covers and seals the battery holder 2 and the alkaline batteries on top. When the screw sleeve 505 moves downward until the vacuum cover 502 touches the base 1, the tension sensor 702 detects that the tension value of the tension spring 701 has reached F1, and sends a signal to the transmission component. The control channel switching component then opens or closes the corresponding vacuum channel 406.

[0029] Please see Figures 1-4 and Figure 8In this embodiment, the gas delivery assembly includes a first inflation pipe 803 connected at one end to the air chamber 302, a plunger 802 movably connected inside the air chamber 302, and a lifting frame 801 mounted on the plunger 802. The lifting frame 801 is fixedly connected between two adjacent threaded sleeves 505. A second inflation pipe 902 is connected at one end to the air cylinder 303, and an air cover 901 is fixedly connected to the other end of the second inflation pipe 902. The air cover 901 is disposed between the partition 503 and the base plate 404. When the lifting frame 801 moves downward, the plunger 802 moves inside the air chamber 302, causing the gas in the air chamber 302 to flow into the air cylinder 303. The unloading rod 903 moves along the air cylinder 303 and extends outside the air cylinder 303. When the partition 503 moves upward, the plunger 802 moves inside the air chamber 302, causing the gas in the air chamber 302 to flow into the air cylinder 303. The unloading rod 903 moves along the air cylinder 303. When the screw sleeve 505 moves upward, the vacuum cover 502 moves away from the base 1. At this time, the partition plate 503, together with the base plate 404, compresses the air cover 901 and inputs the gas in the air cover 901 into the air cylinder 303 through the second air filling pipe 902, causing the plunger 802 to extend from the slide cylinder 403 (at this time, the alkaline battery liquid absorption ends, and after the plunger 802 extends, it pushes away the alkaline battery on the battery holder 2), pushing the alkaline battery on the battery holder 2 into another conveyor for delivery. When the screw sleeve 505 moves downward, the vacuum cover 502 approaches the base 1. At this time, the plunger 802 moves synchronously in the air chamber 302 and inputs the gas in the air chamber 302 into the air cylinder 303 through the second air filling pipe 902, causing the plunger 802 to retract into the slide cylinder 403 (for the next battery loading), pushing the alkaline battery on the battery holder 2 into another conveyor for delivery.

[0030] Please see Figures 1-4 and Figures 6-7In this embodiment, the transmission assembly includes a second motor 1001 mounted on the crossbeam 401, a primary transmission gear 1002 mounted on the output end of the second motor 1001, a connecting rod 1003 movably connected to the crossbeam 401, a secondary transmission gear 1004 mounted on the connecting rod 1003, and a primary transmission bevel gear 1005. The second motor 1001 drives the primary transmission gear 1002 to rotate. The primary transmission gear 1002 meshes with the secondary transmission gear 1004 and drives the secondary transmission gear 1004, connecting rod 1003, and primary transmission bevel gear 1005 to rotate. The channel conversion assembly includes a ball valve 1101 movably connected in the suction channel 406 and a secondary transmission bevel gear 1102 fixedly mounted on the ball valve 1101. The secondary transmission bevel gear 1102 meshes with the corresponding primary transmission bevel gear 1005. The primary transmission bevel gear 1005 drives the secondary transmission bevel gear 1102 and the ball valve 1101 to rotate. Valve 1101 is used to control the opening or closing of the corresponding suction channel 406. When ball valve 1101 opens the corresponding suction channel 406, another ball valve 1101 closes the corresponding suction channel 406. When vacuum chamber 502 abuts against base 1, a closed space is formed between vacuum chamber 502 and base 1. At this time, one suction channel 406 is open and the other suction channel 406 is closed. Vacuum pump starts and pumps away the gas in the closed space through the opened suction channel 406 and the corresponding air pipe. After vacuum liquid suction, motor 1001 outputs power in sequence through primary transmission gear 1002, secondary transmission gear 1004 and primary transmission bevel gear 1005, causing ball valve 1101 to rotate and open the originally closed suction channel 406. At this time, vacuum pump starts again and vacuums the other alkaline battery in vacuum chamber 502 through the switched and opened suction channel 406.

Claims

1. An alkaline battery vacuum liquid aspiration device, comprising a base (1), a battery holder (2) mounted on the base (1), and a vacuum pump; characterized in that: It also includes a support assembly mounted on the base (1), a beam frame assembly mounted on the support assembly, a lifting assembly and a drive assembly mounted on the beam frame assembly. The input end of the lifting assembly is connected to the output end of the drive assembly. The drive assembly is used to drive the lifting assembly to move in the vertical direction. The vacuum pump is connected to the beam frame assembly through a pipe. The vacuum pump extracts the gas in the lifting assembly through the beam frame assembly and the pipe. A signal transmission component is installed on the lifting assembly, and a transmission component is installed on the beam assembly. The signal transmission component is used to send signals to the transmission component. A channel conversion component is installed on the beam assembly. The input end of the channel conversion component is connected to the output end of the transmission component. The transmission component is used to control the channel conversion component to open or close the channel between the beam assembly and the vacuum pump. An air supply assembly and a discharge rod (903) are installed on the support assembly. The air supply assembly is used to control the discharge rod (903) to extend or retract within the support assembly. When the lifting assembly moves upward, the discharge rod (903) extends out of the support assembly; when the lifting assembly moves downward, the discharge rod (903) retracts back into the support assembly.

2. The alkaline battery vacuum liquid aspiration device according to claim 1, characterized in that: The support assembly includes a seat chamber (301) mounted on a base (1), an air chamber (302) mounted on the seat chamber (301), and an air cylinder (303); The beam frame assembly includes a connecting frame (405) mounted on the air chamber (302), a base plate (404) mounted on the connecting frame (405), a slide cylinder (403) mounted on the base plate (404), a top plate (402) mounted on the slide cylinder (403), a crossbeam (401) mounted between adjacent top plates (402), and an air extraction channel (406) mounted on the top plate (402). The air extraction channel (406) is connected to the slide cylinder (403), and the slide cylinder (403) is connected to the lifting assembly. A vacuum pump is connected to the air extraction channel (406) through a pipe.

3. The alkaline battery vacuum liquid aspiration device according to claim 2, characterized in that: The lifting assembly includes an air passage (501) movably connected in the slide (403), a vacuum hood (502) and a partition (503) mounted on the air passage (501), a guide rod (504) and a screw sleeve (505) mounted on the partition (503), the guide rod (504) being slidably connected to the base plate (404), the vacuum hood (502) being above the battery holder (2), and when the vacuum hood (502) moves down onto the base (1), the vacuum hood (502) covers the battery holder (2); The signal transmission component includes a tension spring (701) with one end connected to a threaded sleeve (505), and a tension sensor (702) mounted on the other end of the tension spring (701). The tension sensor (702) is mounted on a top plate (402) and is used to detect the tension value of the tension spring (701).

4. The alkaline battery vacuum liquid aspiration device according to claim 3, characterized in that: The drive assembly includes a screw (601) movably connected at one end to the top plate (402), a secondary flat gear (602) fixedly connected to the other end of the screw (601), a primary motor (606) mounted on the connecting frame (405), a power bevel gear (607) mounted on the output end of the primary motor (606), a main bevel gear (604) meshing with the power bevel gear (607), a main flat gear (603) fixedly mounted on the main bevel gear (604), and a gear meshing with the main flat gear (603) and the secondary flat gear (602). The toothed belt (605) and the main spur gear (603) are movably connected to the air chamber (302). The first motor (606) is used to drive the power bevel gear (607) to rotate. The power bevel gear (607) is used to drive the main bevel gear (604) and the main spur gear (603) to rotate. The main spur gear (603) and the toothed belt (605) are used to drive the secondary spur gear (602) and the screw (601) to rotate. The screw sleeve (505) is threadedly connected to the screw (601). The screw (601) is used to drive the screw sleeve (505) to move in the vertical direction.

5. The alkaline battery vacuum liquid aspiration device according to claim 4, characterized in that: The gas delivery assembly includes a first inflation pipe (803) connected at one end to the air chamber (302), a plunger (802) movably connected in the air chamber (302), and a lifting frame (801) mounted on the plunger (802). The lifting frame (801) is fixedly connected between two adjacent threaded sleeves (505). A second inflation pipe (902) connected at one end to the air cylinder (303) and an air cover (901) fixedly connected to the other end of the second inflation pipe (902) are also included. The air cover (901) is located between the partition plate (503) and the base plate (404). When the lifting frame (801) moves downward, the plunger (802) moves within the air chamber (302) and causes the gas in the air chamber (302) to flow into the air cylinder (303), and the unloading rod (903) moves along the air cylinder (303) and extends outside the air cylinder (303); when the partition (503) moves upward, the plunger (802) moves within the air chamber (302) and causes the gas in the air chamber (302) to flow into the air cylinder (303), and the unloading rod (903) moves along the air cylinder (303) and retracts back into the air cylinder (303).

6. The alkaline battery vacuum liquid aspiration device according to claim 5, characterized in that: The transmission assembly includes a second motor (1001) mounted on a crossbeam (401), a first-stage transmission gear (1002) mounted on the output end of the second motor (1001), a connecting rod (1003) movably connected to the crossbeam (401), a second-stage transmission gear (1004) mounted on the connecting rod (1003), and a first-stage transmission bevel gear (1005). The second motor (1001) is used to drive the first-stage transmission gear (1002) to rotate. The first-stage transmission gear (1002) meshes with the second-stage transmission gear (1004) and drives the second-stage transmission gear (1004), the connecting rod (1003), and the first-stage transmission bevel gear (1005) to rotate.

7. The alkaline battery vacuum liquid suction device according to claim 6, characterized in that: The channel switching assembly includes a ball valve (1101) movably connected in the air extraction channel (406) and a secondary transmission bevel gear (1102) fixedly mounted on the ball valve (1101). The secondary transmission bevel gear (1102) meshes with a corresponding primary transmission bevel gear (1005). The primary transmission bevel gear (1005) drives the secondary transmission bevel gear (1102) and the ball valve (1101) to rotate. The ball valve (1101) controls the opening or closing of the corresponding air extraction channel (406). When the ball valve (1101) opens the corresponding air extraction channel (406), the other ball valve (1101) closes the corresponding air extraction channel (406).

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