Spiral push-pull mechanism for generating alkali metal gas

Abstract

The invention provides a spiral push-pull mechanism for generating alkali metal gas, and relates to the technical field of alkali metal gas. The spiral push-pull type mechanism for generating the alkali metal gas comprises a flange, a valve is installed at the top of the flange, a plurality of first bolts are installed between the flange and the valve, and the bottom ends of the outer walls of the first bolts are all in threaded connection with first nuts; and a stopping mechanism is mounted at the top of the valve. By designing the metal sleeve, the internal thread, the placement pipe, the corrugated pipe and the extrusion mechanism, a worker directly places a glass bulb stored with alkali metal gas into the placement pipe, and an operation hand wheel is rotated to enable an extrusion head to extrude the corrugated pipe so as to extrude the glass bulb, so that the alkali metal atom gas is released. And the product is high in reliability and can be repeatedly disassembled, assembled and used, and only the glass bulb in the placing pipe needs to be replaced during replacement, so that the use cost of the device is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of alkali metal gas technology, specifically to a spiral push-pull mechanism for generating alkali metal gas. Background Technology

[0002] Alkali metals refer to the six metallic elements in Group IA of the periodic table, excluding hydrogen (H): lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). According to the IUPAC, alkali metals belong to Group IA of the periodic table. All alkali metals have one outermost electron in the s orbital, thus this group belongs to the s block of the periodic table. The chemical properties of alkali metals exhibit very obvious homologous behavior, making them the best example of periodicity. Although hydrogen (H) belongs to Group IA, its chemical properties are very different from those of alkali metals, so it is not considered an alkali metal. However, alkali metal atomic gases are key media in existing quantum sensing technologies and ultracold atomic physics experiments, and they are widely used in related fields, especially in precision measurement technologies. Among them, cesium-133 is the fundamental atom used to define the second.

[0003] Existing alkali metal atom source products are mainly divided into two categories. The first is an evaporator based on redox reactions. This type of atom source needs to be installed inside a vacuum system and has electrodes. During use, it needs to be heated to the reaction temperature by applying electricity to catalyze the reaction and then release alkali metal atom gas. The main problem with this type of atom source is that the vacuum system needs to have electrodes, which will affect the stability of the vacuum system and may damage the vacuum environment, thus hindering the improvement of product reliability. The second type involves encapsulating alkali metal atoms in a glass bulb, which is then placed in a copper tube and installed on a vacuum system. This solution has a wider range of applications, but when releasing atoms, external force is still needed to deform the copper tube, which may break the glass bulb. The disadvantages of this solution are that the broken glass bulb can easily enter the cavity, contaminating the experimental environment. Also, the operation is irreversible, and the copper tube needs to be reinstalled each time it is replaced, making the operation more complicated and the cost of use higher.

[0004] To address this, we have developed a new type of spiral push-pull mechanism for generating alkali metal gases. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a spiral push-pull mechanism for generating alkali metal gases. This solves the main problem of this type of atomic source: the vacuum system requires reserved electrodes, which affects the stability of the vacuum system and poses a risk of vacuum environment disruption, thus hindering product reliability. The second approach involves encapsulating alkali metal atoms in a glass bulb, which is then placed inside a copper tube and mounted on a vacuum system. This solution has a wider range of applications, but when releasing atoms, external force is still needed to deform the copper tube, potentially breaking the glass bulb. The disadvantages of this approach are that broken glass bulbs can easily enter the cavity, contaminating the experimental environment; the operation is irreversible, requiring reinstallation of the copper tube each time, making the operation complex and costly.

[0007] Technical solution To achieve the above objectives, the present invention is implemented through the following technical solution: a spiral push-pull mechanism for generating alkali metal gas, comprising a flange, a valve installed on the top of the flange, a plurality of first bolts installed between the flange and the valve, and a first nut threadedly connected to the bottom of the outer wall of each of the plurality of first bolts;

[0008] A blocking mechanism is installed on the top of the valve, a third connecting plate is installed on the top of the blocking mechanism, a plurality of third bolts are installed on the top of the third connecting plate, and a third nut is threaded to the bottom of the outer wall of each of the plurality of third bolts. A metal sleeve is fixedly connected to the top of the third connecting plate, and an internal thread is formed on the top of the inner wall of the metal sleeve.

[0009] The metal sleeve has a placement tube inside, and a corrugated pipe is fixedly connected to the top of the placement tube. A limit mechanism is installed at the bottom of the outer wall of the metal sleeve, and a compression mechanism is installed at the top of the metal sleeve.

[0010] Preferably, the bottom ends of the plurality of first bolts pass through the bottom connecting seat and flange of the valve, respectively.

[0011] The above technical solution facilitates the disassembly of multiple first bolts and multiple first nuts by later staff, thereby disassembling the valve. When the valve is used for a long time, it needs to be disassembled, inspected or replaced regularly. The device can be connected to other receiving equipment through flanges, thereby facilitating the reception of alkali metal gases.

[0012] Preferably, the blocking mechanism includes a first connecting plate, which is installed on the top connecting seat of the valve. A connecting sleeve is fixedly connected to the top of the first connecting plate, and a second connecting plate is fixedly connected to the top of the connecting sleeve. A blocking plate is fixedly connected to the bottom of the inner wall of the connecting sleeve. A filter screen is provided on the top of the blocking plate. A plurality of second bolts are installed between the top connecting seat of the valve and the first connecting plate. The top of the outer wall of each of the plurality of second bolts is threaded with a second nut. The plurality of second bolts and the plurality of second nuts facilitate connection with the valve.

[0013] Through the above technical solution, the barrier plate and connecting sleeve serve to store the filter screen, which can block glass fragments, thereby preventing broken glass debris from entering the remaining cavities through the flange and valve.

[0014] Preferably, the tips of the plurality of second bolts all penetrate the top connecting seat and the first connecting plate of the valve.

[0015] The above technical solution facilitates the disassembly of the barrier mechanism and valve by the staff, thereby making it easier to disassemble and replace the valve, and also makes it easier to disassemble and replace the filter screen inside the barrier mechanism, thus improving the reception of alkali metal gases.

[0016] Preferably, the bottom ends of the plurality of third bolts all penetrate the third connecting disc and the second connecting disc.

[0017] With the above technical solution, when the staff needs to replace the filter screen, they can remove multiple third bolts and multiple third nuts to separate the third connecting plate from the second connecting plate. This allows the staff to remove the filter screen from the barrier plate and connecting sleeve, preventing glass fragments from blocking the inside of the filter screen for a long time and thus affecting the delivery of alkali metal gas.

[0018] Preferably, the metal sleeve has a cavity inside, the third connecting plate and the metal sleeve are integrally formed, and the bottom of the third connecting plate has multiple first exhaust holes.

[0019] Through the above technical solution, the cavity inside the metal sleeve is convenient for placing the placement tube and the corrugated tube, thereby facilitating the storage of alkali metal gas in the glass bulb. At the same time, the metal sleeve has strong sealing performance, and its bottom end can prevent broken glass fragments from entering the barrier mechanism, thus providing a certain filtration effect.

[0020] Preferably, the placement tube and the corrugated tube are an integral structure, and the bottom of the placement tube is provided with multiple second vent holes.

[0021] With the above technical solution, workers can directly place a glass bulb containing alkali metal gas into the placement tube. When the corrugated tube is squeezed, the glass bulb inside the placement tube can be squeezed. At the same time, multiple second exhaust holes can effectively transport the alkali metal gas coming out of the glass bulb and also effectively block glass fragments.

[0022] Preferably, the limiting mechanism includes a housing, which is fixedly connected to the bottom of the outer wall of the metal sleeve. The housing has multiple mounting slots, each of which contains a return spring. The inner wall of each mounting slot has two limiting slots. The outer ends of each return spring are fixedly connected to limiting blocks. Limiting strips are slidably connected in every two limiting slots.

[0023] With the above technical solution, when the placement tube is inserted into the metal sleeve, the bottom end of the placement tube presses against multiple limiting blocks, causing the multiple limiting blocks to retract through multiple return springs, thereby bringing the bottom end of the placement tube into contact with the inner surface of the bottom end of the metal sleeve. The multiple limiting blocks, through the elastic force of the multiple return springs, press against the outer wall of the metal sleeve, thereby achieving the limitation and fixation of the metal sleeve, which facilitates the pressing mechanism to press it, thus improving the stability of the glass bulb placement in the placement tube.

[0024] Preferably, in the combined state, all of the limiting blocks are in close contact with the outer wall of the placement tube.

[0025] Through the above technical solution, while multiple limit blocks are sliding, the two limit strips on their outer walls slide with the corresponding limit grooves, thereby improving the stability of the sliding limit blocks.

[0026] Preferably, the extrusion mechanism includes an extrusion head, which is slidably connected to a metal sleeve. A plurality of cones are fixedly connected to the bottom end of the extrusion head, a connecting rod is fixedly connected to the top end of the extrusion head, a threaded disc is fixedly connected to the top end of the connecting rod, and an operating handwheel is fixedly connected to the top end of the threaded disc.

[0027] With the above technical solution, when workers need to crush a glass bulb containing alkali metal gas in a placement tube, they press down and turn the operating handwheel to connect the threaded disc with the internal thread in the metal sleeve. Continuing to turn the operating handwheel causes the bottom end of the extrusion head to squeeze the bellows, compressing the bellows and causing multiple cones at the bottom of the extrusion head to rupture the glass bulb in the placement tube, thus releasing the alkali metal gas inside the glass bulb. This extrusion mechanism, through its purely mechanical structure design, has high reliability and is easy to disassemble and reuse.

[0028] Beneficial effects

[0029] This invention provides a helical push-pull mechanism for generating alkali metal gases. It has the following advantages:

[0030] This spiral push-pull mechanism for generating alkali metal gas features a metal sleeve, internal thread, placement tube, bellows, and extrusion mechanism. Operators directly place a glass bulb containing alkali metal gas into the placement tube, and by rotating the handwheel, the extrusion head squeezes the bellows, thereby releasing the alkali metal gas atoms. The advantage of this mechanism lies in its purely mechanical structure, high product reliability, and ability to be repeatedly disassembled and reused. Replacement only requires replacing the glass bulb in the placement tube, significantly reducing the operating cost of the device.

[0031] This spiral push-pull mechanism for generating alkali metal gas incorporates valves and a blocking mechanism. When collecting alkali metal gas from a glass bulb, the valves regulate the flow of the gas, while the filter in the blocking mechanism prevents broken glass fragments from entering other chambers. The blocking mechanism is secured with bolts and nuts, facilitating filter replacement and improving the effectiveness of blocking glass fragments.

[0032] This spiral push-pull mechanism for generating alkali metal gases features a limiting mechanism that can quickly and effectively limit the inserted placement tube and bellows, facilitating the extrusion mechanism to compress them and thus improving the stability of the glass bulb placement within the placement tube. Attached Figure Description

[0033] Figure 1 This is a first-view view of the present invention; Figure 2 This is a second-view view of the present invention; Figure 3 This is the front view of the present invention; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This is a first-view exploded view of the present invention; Figure 6 This is a second-view exploded view of the present invention; Figure 7 This is a schematic diagram of the limiting mechanism structure of the present invention; Figure 8 for Figure 4 A magnified view of a section at point A in the middle; Figure 9 for Figure 5 A magnified view of a section at point B.

[0034] The components are as follows: 1. Flange; 2. Valve; 3. First bolt; 4. First nut; 5. Barrier mechanism; 501. First connecting plate; 502. Connecting sleeve; 503. Second connecting plate; 504. Barrier plate; 505. Filter screen; 506. Second bolt; 507. Second nut; 6. Third connecting plate; 7. Third bolt; 8. Third nut; 9. Metal sleeve; 10. Internal thread; 11. Placement tube; 12. Bellows; 13. Limiting mechanism; 1301. Housing; 1302. Mounting groove; 1303. Return spring; 1304. Limiting groove; 1305. Limiting block; 1306. Limiting strip; 14. Extrusion mechanism; 1401. Extrusion head; 1402. Cone head; 1403. Connecting rod; 1404. Threaded disc; 1405. Operating handwheel. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example: like Figures 1-9 As shown, this embodiment of the invention provides a spiral push-pull mechanism for generating alkali metal gas, including a flange 1, a valve 2 mounted on the top of the flange 1, and multiple first bolts 3 installed between the flange 1 and the valve 2. Each of the first bolts 3 has a first nut 4 threaded to its outer bottom end. The bottom ends of the first bolts 3 pass through the bottom connecting seat of the valve 2 and the flange 1, facilitating disassembly of the first bolts 3 and the first nuts 4 by personnel. The valve 2 requires periodic disassembly, maintenance, or replacement during long-term use. This device can be connected to other receiving equipment via the flange 1, facilitating the generation of alkali metal gas. The receiving and blocking mechanism 5 has a third connecting plate 6 installed on its top. Multiple third bolts 7 are installed on the top of the third connecting plate 6. Each of the outer bottom of the multiple third bolts 7 is threaded with a third nut 8. The bottom of each of the multiple third bolts 7 penetrates both the third connecting plate 6 and the second connecting plate 503. When the operator needs to replace the filter screen 505, they disassemble the multiple third bolts 7 and the multiple third nuts 8, thereby disassembling the third connecting plate 6 from the second connecting plate 503. This allows the operator to remove the filter screen 505 from the blocking plate 504 and the connecting sleeve 502, preventing glass fragments from blocking the inside of the filter screen 505 for an extended period, thus affecting the transport of alkali metal gas.

[0037] like Figure 4 and Figure 5As shown, a metal sleeve 9 is fixedly connected to the top of the third connecting plate 6. The metal sleeve 9 has a cavity inside. The third connecting plate 6 and the metal sleeve 9 are an integral structure. Multiple first exhaust holes are opened at the bottom of the third connecting plate 6. The cavity inside the metal sleeve 9 facilitates the placement of the placement tube 11 and the corrugated pipe 12, thereby facilitating the storage of alkali metal gas inside the glass bulb. Simultaneously, the metal sleeve 9 has strong sealing properties, and its bottom end can prevent broken glass fragments from entering the blocking mechanism 5, providing a certain filtering effect. An internal thread is opened at the top of the inner wall of the metal sleeve 9. The metal sleeve 9 has a placement tube 11 inside, and a corrugated pipe 12 is fixedly connected to the top of the placement tube 11. The placement tube 11 and the corrugated pipe 12 are an integral structure. The bottom of the placement tube 11 has multiple second exhaust holes. The operator can directly place the glass bulb containing alkali metal gas into the placement tube 11. When the corrugated pipe 12 is squeezed, the glass bulb in the placement tube 11 can be squeezed. At the same time, the multiple second exhaust holes can effectively transport the alkali metal gas coming out of the glass bulb and also effectively block glass fragments.

[0038] like Figure 3 and Figure 9 As shown, a blocking mechanism 5 is installed on the top of valve 2. The blocking mechanism 5 includes a first connecting plate 501, which is installed on the top connecting seat of valve 2. A connecting sleeve 502 is fixedly connected to the top of the first connecting plate 501, and a second connecting plate 503 is fixedly connected to the top of the connecting sleeve 502. A blocking plate 504 is fixedly connected to the bottom of the inner wall of the connecting sleeve 502. A filter screen 505 is provided on the top of the blocking plate 504. Multiple second bolts 506 are installed between the top connecting seat of valve 2 and the first connecting plate 501. The top of the outer wall of each of the multiple second bolts 506 is threaded with a second nut 507. 506 and multiple second nuts 507 facilitate connection with valve 2. The barrier plate 504 and connecting sleeve 502 serve to store the filter screen 505, which can block glass fragments, thereby preventing broken glass debris from entering the remaining cavities through flange 1 and valve 2. The tips of multiple second bolts 506 all penetrate the top connecting seat of valve 2 and the first connecting plate 501, making it easy for operators to disassemble the barrier mechanism 5 from valve 2, thus facilitating the disassembly and replacement of valve 2. It also facilitates the disassembly and replacement of the filter screen 505 inside the barrier mechanism 5, thereby improving the reception of alkali metal gases.

[0039] like Figure 7 and Figure 8As shown, a limiting mechanism 13 is installed at the bottom of the outer wall of the metal sleeve 9. The limiting mechanism 13 includes a housing 1301, which is fixedly connected to the bottom of the outer wall of the metal sleeve 9. Multiple mounting slots 1302 are provided inside the housing 1301, and each mounting slot 1302 is equipped with a return spring 1303. Two limiting slots 1304 are provided on the inner wall of each mounting slot 1302. Limiting blocks 1305 are fixedly connected to the outer ends of each set of return springs 1303. Limiting strips 1306 are slidably connected within each pair of limiting slots 1304. When the placement tube 11 is inserted into the metal sleeve 9, the bottom end of the placement tube 11 presses against the multiple limiting blocks 1305, causing the multiple limiting blocks 1305 to pass through the multiple return springs respectively. Spring 1303 retracts, thereby bringing the bottom end of placement tube 11 into contact with the inner surface of the bottom end of metal sleeve 9. Multiple limiting blocks 1305 press against the outer wall of metal sleeve 9 through the elastic force of multiple return springs 1303, thereby limiting and fixing metal sleeve 9, which facilitates the pressing mechanism 14 to press it, thereby improving the stability of glass bulb placement in placement tube 11. In the combined state, multiple limiting blocks 1305 are tightly fitted to the outer wall of placement tube 11. While multiple limiting blocks 1305 slide, the two limiting strips 1306 on their outer walls slide against the corresponding limiting grooves 1304, thereby improving the stability of sliding limiting blocks 1305.

[0040] like Figure 5 and Figure 6 As shown, a compression mechanism 14 is installed on the top of the metal sleeve 9. The compression mechanism 14 includes a compression head 1401, which is slidably connected inside the metal sleeve 9. Multiple conical heads 1402 are fixedly connected to the bottom end of the compression head 1401, and a connecting rod 1403 is fixedly connected to the top end of the compression head 1401. A threaded disc 1404 is fixedly connected to the top end of the connecting rod 1403, and an operating handwheel 1405 is fixedly connected to the top end of the threaded disc 1404. When the operator needs to compress and break the glass bulb containing alkali metal gas stored in the placement tube 11... At this time, the operator presses down and rotates the operating handwheel 1405, so that the threaded disc 1404 is threadedly connected to the internal thread 10 in the metal sleeve 9. Continuing to rotate the operating handwheel 1405 causes the bottom end of the extrusion head 1401 to extrude the bellows 12. The bellows 12 is compressed, thereby causing the multiple cones 1402 at the bottom of the extrusion head 1401 to rupture the glass bulb in the placement tube 11, thus realizing the emission of alkali metal gas in the glass bulb. This extrusion mechanism 14 has a high reliability due to its purely mechanical structure design and is easy to disassemble and reuse.

[0041] Working principle: The operator places a glass bulb containing alkali metal gas into the placement tube 11, and then inserts the placement tube 11 into the metal sleeve 9. The bottom end of the placement tube 11 presses against multiple limiting blocks 1305, causing the limiting blocks 1305 to contract through multiple return springs 1303. This brings the bottom end of the placement tube 11 into contact with the inner surface of the bottom end of the metal sleeve 9. The multiple limiting blocks 1305, through the elastic force of the multiple return springs 1303, press against the outer wall of the metal sleeve 9, thus limiting and fixing the metal sleeve 9. At this time, the operator presses down and rotates the operating handwheel 1405, causing the threaded disc 1404 to connect with the internal thread 10 inside the metal sleeve 9. Continuing to rotate the operating handwheel 1405 causes the bottom end of the extrusion head 1401 to press against the bellows 12. The bellows 12 is compressed, thereby causing the multiple cones at the bottom of the extrusion head 1401 to... 1402 ruptures the glass bulb inside the placement tube 11, thereby releasing the alkali metal gas inside the glass bulb. The alkali metal gas is released through the bottom of the placement tube 11 to the third connecting plate 6 at the bottom of the metal sleeve 9, then to the valve 2, and then through the flange 1 to the connected receiving device, thus achieving the reception of the alkali metal gas. After receiving the alkali metal gas, the operator removes the placement tube 11 and pours out the broken glass bulb. At the same time, multiple third bolts 7 and multiple third nuts 8 can be disassembled, thereby disassembling the third connecting plate 6 from the second connecting plate 503. This allows the operator to remove and replace the filter screen 505 inside the barrier plate 504 and the connecting sleeve 502. Simultaneously, the operator disassembles multiple first bolts 3 and multiple first nuts 4, thereby disassembling the valve 2, thus enabling the periodic disassembly, maintenance, or replacement of the valve 2.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spiral push-pull mechanism for generating alkali metal gas, comprising a flange (1), characterized in that: A valve (2) is installed on the top of the flange (1), and a plurality of first bolts (3) are installed between the flange (1) and the valve (2). The bottom of the outer wall of the plurality of first bolts (3) is threaded with a first nut (4). The valve (2) is equipped with a blocking mechanism (5) on top, a third connecting plate (6) is installed on top of the blocking mechanism (5), a plurality of third bolts (7) are installed on top of the third connecting plate (6), and a third nut (8) is threaded to the bottom of the outer wall of the plurality of third bolts (7). A metal sleeve (9) is fixedly connected to the top of the third connecting plate (6), and an internal thread (10) is opened on the top of the inner wall of the metal sleeve (9). The metal sleeve (9) has a placement tube (11) inside, and a corrugated pipe (12) is fixedly connected to the top of the placement tube (11). A limiting mechanism (13) is installed at the bottom of the outer wall of the metal sleeve (9), and a pressing mechanism (14) is installed at the top of the metal sleeve (9).

2. The spiral push-pull mechanism for generating alkali metal gas according to claim 1, characterized in that: The bottom ends of the first bolts (3) pass through the bottom connecting seat and flange (1) of the valve (2), respectively.

3. The spiral push-pull mechanism for generating alkali metal gas according to claim 1, characterized in that: The blocking mechanism (5) includes a first connecting plate (501), which is installed on the top connecting seat of the valve (2). A connecting sleeve (502) is fixedly connected to the top of the first connecting plate (501). A second connecting plate (503) is fixedly connected to the top of the connecting sleeve (502). A blocking plate (504) is fixedly connected to the bottom of the inner wall of the connecting sleeve (502). A filter screen (505) is provided on the top of the blocking plate (504). A plurality of second bolts (506) are installed between the top connecting seat of the valve (2) and the first connecting plate (501). A second nut (507) is threaded to the top of the outer wall of each of the plurality of second bolts (506).

4. A spiral push-pull mechanism for generating alkali metal gas according to claim 3, characterized in that: The top ends of multiple second bolts (506) penetrate the top connecting seat of valve (2) and the first connecting plate (501).

5. A spiral push-pull mechanism for generating alkali metal gas according to claim 3, characterized in that: The bottom ends of the plurality of third bolts (7) all penetrate the third connecting disc (6) and the second connecting disc (503).

6. A spiral push-pull mechanism for generating alkali metal gas according to claim 1, characterized in that: The metal sleeve (9) has a cavity inside, the third connecting plate (6) and the metal sleeve (9) are an integral structure, and the bottom of the third connecting plate (6) has multiple first exhaust holes.

7. A spiral push-pull mechanism for generating alkali metal gas according to claim 1, characterized in that: The placement tube (11) and the corrugated tube (12) are an integral structure, and the bottom of the placement tube (11) is provided with multiple second exhaust holes.

8. A spiral push-pull mechanism for generating alkali metal gas according to claim 1, characterized in that: The limiting mechanism (13) includes a housing (1301), which is fixedly connected to the bottom of the outer wall of the metal sleeve (9). The housing (1301) has multiple mounting slots (1302) inside, and a return spring (1303) is installed in each of the multiple mounting slots (1302). Two limiting slots (1304) are opened in the inner wall of each of the multiple mounting slots (1302). A limiting block (1305) is fixedly connected to the outer end of each of the multiple return springs (1303). A limiting strip (1306) is slidably connected in every two of the limiting slots (1304).

9. A spiral push-pull mechanism for generating alkali metal gas according to claim 8, characterized in that: In the combined state, all of the limiting blocks (1305) are tightly fitted to the outer wall of the placement tube (11).

10. A spiral push-pull mechanism for generating alkali metal gas according to claim 1, characterized in that: The extrusion mechanism (14) includes an extrusion head (1401), which is slidably connected to a metal sleeve (9). Multiple cones (1402) are fixedly connected to the bottom end of the extrusion head (1401), and a connecting rod (1403) is fixedly connected to the top end of the extrusion head (1401). A threaded disc (1404) is fixedly connected to the top end of the connecting rod (1403), and an operating handwheel (1405) is fixedly connected to the top end of the threaded disc (1404).

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