Anesthetic gas scavenging device

Abstract

The application relates to an anesthetic gas purifying device which comprises a bottom tank, an air inlet pipe connected to the left and right sides of the bottom tank respectively, a mounting ring detachably connected to the upper end of the air inlet pipe, a top cover detachably connected to the upper end of the mounting ring, a plurality of mounting mechanisms arranged in the top cover, an air outlet pipe arranged at the upper end of the top cover, and a mounting plate, wherein the lower end of the mounting plate is provided with a mounting cylinder which is slidably connected with the mounting plate, so that the detachable connection between the mounting cylinder and the mounting plate can be realized, and the internal mounting volume of the mounting cylinder can be changed. In actual use, the filter is mounted by the mounting cylinder, the purifying process of the device for anesthetic gas is not limited to specific substances, the device can accurately select suitable filter substances according to the storage period and the storage environment of the anesthetic gas, the purification direction is guaranteed, and the purifying process can be realized by only using the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a kind of anesthetic gas purification device. BACKGROUND

[0002] Anesthesiology is a comprehensive discipline, which contains multi-disciplinary knowledge. It is very wide, not only to meet the requirements of operation, but also to participate in the rescue work of various departments, painless delivery of gynecology, painless abortion, etc.

[0003] Anesthetic gases include inhalation anesthetics such as enflurane and ether. In the process of gas anesthesia medical treatment, the anesthetic gas is usually purified and filtered before being absorbed by the human body to avoid damage to the human body caused by toxic substances in the anesthetic gas. The existing anesthetic gas may be contaminated by the outside world and the storage device during transmission or storage. Therefore, the anesthetic gas needs to be purified to ensure the cleanliness of the anesthetic gas during actual treatment.

[0004] Chinese patent authorization publication number UN202210288183.6 discloses an anesthetic gas purification device. Specifically, it realizes solid-gas separation by setting multiple filter screens with different functions in the middle ring to filter the small solid impurities in the anesthetic gas. However, in actual use, since only filter screens are used to purify the gas, it can only realize solid-gas separation. During storage, not only small solid impurities may be generated, but also other gas impurities such as water vapor and waste gas may be generated. In order to ensure the cleanliness of the anesthetic gas during inhalation and the comfort of the patient, the existing technical device needs to be additionally treated in many cases to meet the actual use requirements. SUMMARY

[0005] In view of the shortcomings of the prior art, the present application provides an anesthetic gas purification device, which has the advantages of flexible adjustment of the filtering scheme according to the actual situation to achieve good filtering of different impurities. The device solves the problem that the existing technical device can only realize solid-gas separation and cannot adjust the filtering scheme according to the actual situation.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] The utility model provides an anaesthetic gas purifying device, including bottom jar, both sides of bottom jar respectively lead to have an air inlet pipe, the upper end of bottom jar is detachably connected with the mounting ring, the upper end of mounting ring is detachably connected with the top cap, the inside of mounting ring is detachably set from top to bottom with a plurality of mounting mechanism, the upper end of top cap is provided with the air outlet pipe, the mounting mechanism includes the mounting plate, the lower end of mounting plate is provided with the mounting cylinder, the mounting plate is provided with the sliding slot I to the mounting cylinder, the upper end of mounting cylinder is open type structure, and the mounting cylinder is slidably connected with the mounting plate, and the mounting cylinder does the linear motion up and down relative to the mounting plate, the cavity formed by mounting cylinder and mounting plate is placed with the filter material for absorbing water vapor and waste gas, the mounting cylinder is equipped with the sealing ring I, the sealing ring I is interference fit with the sliding slot I, a plurality of through holes are provided from top to bottom on the lower end of mounting cylinder and the upper end of mounting plate.

[0008] Preferably, the mounting cylinder is provided with a metering mechanism, the metering mechanism includes a mounting groove, a compression spring is horizontally arranged in the mounting groove, the compression spring is fixedly connected with a fixed block at one end away from the mounting cylinder, the lower end of the mounting plate is fixedly connected with a connecting rod, the number of connecting rods is consistent with that of the fixed blocks, a fixed groove is arranged on the connecting rod for the fixed block, and a plurality of fixed grooves are arranged on each connecting rod from top to bottom.

[0009] Preferably, the upper and lower end faces of the fixed block are arc faces.

[0010] Preferably, a filter screen is arranged on the inner wall above the lower end of the mounting plate and the lower end of the mounting cylinder.

[0011] Preferably, one L-shaped pipe is arranged at one end of each of the two air inlet pipes close to each other, and the two L-shaped pipes are oppositely arranged, the horizontal end of the L-shaped pipe is fixedly connected with the inner wall of the lower end of the bottom jar, and the relative height of the lower end of the air inlet pipe is greater than that of the inner wall of the lower end of the bottom jar.

[0012] Preferably, a plurality of U-shaped plates are nested on the outer side of the mounting plate, the mounting plate is located in the U-shaped opening of the U-shaped plate, the U-shaped plate is slidably connected with the mounting plate, a magnetic plate I is fixedly connected at one end of the U-shaped plate away from the mounting plate, a notch groove is arranged in the mounting ring for the magnetic plate I, a magnetic plate II is embedded in the notch groove, a sealing ring II is fixedly connected on the part of the outer side of the mounting plate not embedded in the U-shaped plate, the sealing ring II is interference fit with the mounting ring, and a sliding slot III is arranged on the mounting cylinder for the U-shaped plate.

[0013] Preferably, the front and rear end faces of the notch groove are inclined faces, and a rotating piece is arranged on the mounting plate.

[0014] Preferably, a limiting rod is fixedly connected in the U-shaped opening of the U-shaped plate, and a sliding slot II is arranged on the mounting plate for the limiting rod.

[0015] Preferably, the mounting ring is provided with a connecting ring I at both ends, the bottom tank and the top cover are respectively provided with a connecting ring II at one end close to the mounting ring, the connecting ring II can be embedded into the connecting ring I, the inner ring of the connecting ring I is provided with a limiting block, the connecting ring II is provided with a limiting groove for the limiting block, and the upper end surface of the limiting groove has a certain inclination, the connecting ring I is provided with a sealing ring III at one end away from the mounting ring, and when the limiting block is located at the relatively lowest point of the upper end surface of the limiting groove, the sealing ring III is in interference fit with the bottom tank and the top cover.

[0016] Compared with the prior art, the present application has the beneficial effects that:

[0017] The present application can accurately select suitable filter material according to the storage period and environment of the anesthetic gas, ensure the accurate purification, and only need the device to realize the complete purification process.

[0018] The present application can help users to know the actual mounting volume in the mounting cylinder through the metering mechanism, and the relative position between the mounting plate and the mounting cylinder can be fixed through the friction resistance and compression force of the sealing ring I on the mounting plate and the mounting cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the connection between the mounting plate and the mounting ring of the present application;

[0021] Figure 3 It is a schematic diagram of the connection between the mounting cylinder and the mounting plate of the present application;

[0022] Figure 4 It is a schematic diagram of the connection between the mounting plate and the rotating part of the present application;

[0023] Figure 5 It is a schematic diagram of the connection between the mounting cylinder and the fixed block of the present application;

[0024] Figure 6 It is a schematic diagram of the connection between the fixed block and the compression spring of the present application;

[0025] Figure 7 It is a schematic diagram of the position relationship between the limiting block and the limiting groove of the present application.

[0026] In the figure: 1, the air pipe; 2, the top cover; 3, the mounting ring; 4, the air inlet pipe; 5, the magnetic plate II; 6, the notch groove; 7, the magnetic plate I; 8, the U-shaped plate; 9, the sealing ring II; 10, the mounting plate; 11, the mounting cylinder; 12, the sealing ring I; 13, the through hole; 14, the sliding groove II; 15, the limiting rod; 16, the filter screen; 17, the rotating piece; 18, the connecting rod; 19, the sliding groove I; 20, the sliding groove III; 21, the fixed block; 22, the fixed groove; 23, the mounting groove; 24, the compression spring; 25, the sealing ring III; 26, the connecting ring I; 27, the bottom tank; 28, the limiting block; 29, the limiting groove; 30, the connecting ring II; 31, the L-shaped pipe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] Please refer to Figures 1-7 A kind of anesthetic gas purification device, including bottom tank 27, the open structure is formed on the upper end of the bottom tank 27.

[0030] The left and right sides of the bottom tank 27 are respectively connected with an air inlet pipe 4, so as to respectively fill oxygen and anesthetic gas into the bottom tank 27 through the air inlet pipe 4, and a flow valve and a quick connection port should be arranged on the air inlet pipe 4, wherein the flow valve is mainly used to control the filling speed of oxygen and anesthetic gas, and the quick connection port is mainly used to ensure the quickness of connecting the oxygen pipe and the anesthetic pipe with the device, wherein the flow valve and the quick connection port are common components on the market, with various models.

[0031] The bottom tank 27 is detachably connected with a mounting ring 3 at the upper end, and the mounting ring 3 is detachably connected with a top cover 2 at the upper end, wherein the mounting ring 3 is open at the upper and lower ends, the top cover 2 is open at the lower end, and the top cover 2, the mounting ring 3 and the bottom tank 27 are integrally formed into a sealed structure by being arranged at the upper and lower ends and ensuring the sealing of the interfaces, so that the gas flowing into the air inlet pipe 4 can escape from the bottom tank 27 into the top cover 2 and cannot overflow.

[0032] The mounting ring 3 is provided with a connecting ring I 26 at each end of the upper end, and the bottom tank 27 and the top cover 2 are respectively provided with a connecting ring II 30 at one end close to the mounting ring 3, and the connecting ring II 30 can be embedded in the connecting ring I 26. By embedding the connecting ring II 30 in the connecting ring I 26, the gas escaping can be hindered, so that the gas must pass through a narrow channel to escape to the outside, which is a one-time sealing process.

[0033] The connecting ring I 26 is provided with a limiting block 28 at the inner ring, and the connecting ring II 30 is provided with a limiting groove 29 for the limiting block 28, and the upper end surface of the limiting groove 29 has a certain inclination. In actual use, when the limiting block 28 is embedded in the limiting groove 29, the limiting block 28 can be rotated in the limiting groove 29 by rotating the mounting ring 3. At this time, the inclination of the limiting groove 29 itself can force the relative distance between the connecting ring I 26 and the connecting ring II 30 to decrease (the inclination of the limiting groove 29 itself will gradually reduce the relative distance between the upper and lower ends of the limiting block 28 and the limiting groove 29, that is, the upper and lower distance of the limiting block 28 in the limiting groove 29 gradually reduces with rotation, so that the limiting block 28 gradually approaches the top cover 2 or the bottom tank 27 with rotation), so that the connecting ring II 30 can be completely embedded in the connecting ring I 26, further improving the narrowness of the gas flow channel. At the same time, two limiting grooves 29 can be provided on each connecting ring II 30, and two limiting blocks 28 can be provided on each connecting ring I 26, and the two limiting grooves 29 are not connected and are symmetrically arranged at the center (that is, the relative height of the front end of one limiting groove 29 is greater than that of the rear end, and the relative height of the rear end of the other limiting groove 29 is greater than that of the front end), so that the relative position between the connecting ring I 26 and the connecting ring II 30 can be limited from two directions in actual use, avoiding the disconnection of the connecting ring I 26 or the connecting ring II 30 due to unilateral stress.

[0034] The sealing ring III 25 is in interference fit with the bottom tank 27 and the top cover 2 when the limiting block 28 is located at the upper end of the limiting groove 29 at the relative lowest point, thereby completely hindering the gas by interference fit, so that the gas in the installation ring 3 cannot flow to the outside through the narrow passage around the sealing ring III 25, ensuring the sealing of the top cover 2, the bottom tank 27 and the installation ring 3. Specifically, a stop block can be arranged at the relatively low end of the limiting groove 29 in actual use, so that the user can be reminded to stop in time when the user cannot make the connecting ring I 26 and the connecting ring II 30 rotate relatively, and know that the sealing effect can be achieved here.

[0035] The top cover 2 is provided with an air outlet pipe 1 at the upper end, through which the filtered and mixed anesthetic gas that can be directly inhaled can be delivered to the designated position. Specifically, a face mask can be arranged at the end of the air outlet pipe 1 away from the top cover 2 to facilitate the patient to inhale the mixture of anesthetic gas and oxygen.

[0036] A plurality of installation mechanisms are detachably arranged in the installation ring 3 from top to bottom, which can be used to install the filter.

[0037] The installation mechanism includes an installation plate 10, and a plurality of U-shaped plates 8 are nested on the outer side of the installation plate 10. The installation plate 10 is located in the U-shaped opening of the U-shaped plate 8, and the U-shaped plate 8 is in sliding connection with the installation plate 10. As shown in the figure, the U-shaped plate 8 moves linearly left and right relative to the installation plate 10.

[0038] The installation ring 3 is provided with a notch groove 6 for the U-shaped plate 8. In actual use, the relative fixing process of the U-shaped plate 8, i.e. the installation plate 10, can be realized by embedding the U-shaped plate 8 in the notch groove 6. At this time, the installation plate 10 and the installation ring 3 keep the same motion state. When the gas flows upward from the bottom tank 27, an upward thrust will be applied to the installation plate 10. At this time, the installation plate 10 can be prevented from moving upward relative to the installation ring 3 by the cooperation of the U-shaped plate 8 and the notch groove 6.

[0039] The U-shaped plate 8 is fixedly connected with a magnetic plate I 7 at the end away from the installation plate 10, and a magnetic plate II 5 is embedded in the notch groove 6. The notch groove 6 cooperates with the magnetic plate I 7. In actual use, the magnetic connection between the magnetic plate I 7 and the magnetic plate II 5 can ensure that the U-shaped plate 8 can be fixed in the notch groove 6, so that the U-shaped plate 8 will not slide relative to the installation plate 10 due to the shaking of the installation ring 3, and the U-shaped plate 8 will not come out of the notch groove 6.

[0040] The inclined surfaces are on both sides of the notch groove 6. When the user rotates the mounting plate 10 to drive the U-shaped plate 8, the U-shaped plate 8 is driven out of the notch groove 6 through the inclined surfaces, i.e., the front and rear end surfaces of the notch groove 6 are inclined surfaces. When the user rotates the mounting plate 10 to drive the U-shaped plate 8 to rotate relative to the mounting ring 3, the inclined surfaces in the notch groove 6 can convert the rotating force into a pushing force towards the central axis of the mounting plate 10, so that the U-shaped plate 8 can slide relative to the mounting plate 10. At this time, the U-shaped plate 8 is separated from the notch groove 6, and the user can slide the mounting plate 10 up and down relative to the mounting ring 3, realizing the detachable connection between the mounting plate 10 and the mounting ring 3.

[0041] The U-shaped plate 8 is fixedly connected with a limiting rod 15 in the U-shaped opening. The mounting plate 10 is provided with a sliding groove II 14 for the limiting rod 15. The limiting rod 15 and the sliding groove II 14 can cooperate with each other to prevent the U-shaped plate 8 from being separated from the mounting plate 10 without hindering the relative sliding between the U-shaped plate 8 and the mounting plate 10, and also enable the U-shaped plate 8 to maintain the same movement state as the mounting plate 10. Rotating the mounting plate 10 can drive the U-shaped plate 8 to rotate.

[0042] The mounting plate 10 is provided with a rotating member 17 to facilitate the user to rotate the mounting plate 10 to drive the U-shaped plate 8 to rotate relative to the mounting ring 3. The rotating member 17 can adopt various forms such as a hand wheel, a rotating rod, etc.

[0043] The part of the mounting plate 10 outside the U-shaped plate 8 is fixedly connected with a sealing ring II 9. The sealing ring II 9 is in interference fit with the mounting ring 3, thereby avoiding the gas in the bottom tank 27 from flowing upward from the gap between the mounting plate 10 and the mounting ring 3 during upward flow.

[0044] The mounting plate 10 is provided with a mounting cylinder 11 at the lower end. The upper end of the mounting cylinder 11 is of an open structure to facilitate adding filter materials to the inside of the mounting cylinder 11 from the upper end of the mounting cylinder 11. The filter materials should include but are not limited to filter screens, reactants, adsorbents, etc. Specifically, polypropylene film folding filter layers or similar filter layers can be placed for small solid impurities to ensure gas permeability, solid sodium hydroxide or activated carbon can be placed for water vapor (the commonly used anesthetic gas is anesthetics, ether, etc., which does not react with sodium hydroxide and activated carbon at room temperature), and metallic sodium can be placed for nitrogen in waste gas (metallic sodium can react with nitrogen at room temperature, 6Li+N2→2Li3N).

[0045] The mounting plate 10 is provided with a sliding groove I 19 for the mounting cylinder 11, the mounting cylinder 11 is connected with the mounting plate 10 through the sliding groove I 19, the mounting cylinder 11 moves up and down relative to the mounting plate 10, so that the mounting volume of the mounting cylinder 11 can be changed by changing the relative distance between the inner wall of the lower end of the mounting cylinder 11 and the lower end surface of the mounting plate 10, so that the effect of fixing, flattening and compressing the filter material can be achieved by changing the mounting volume (the filter screen 16 can normally play a role by fixing and flattening the filter screen 16, and the gas can fully contact with the reactant and the adsorbent by compressing the reactant and the adsorbent).

[0046] The mounting cylinder 11 is provided with a sealing ring I 12, the sealing ring I 12 is interference fit with the sliding groove I 19, the interference fit can not only ensure that the gas does not flow in the gap between the mounting cylinder 11 and the mounting ring 3, but also can fix the relative position between the mounting cylinder 11 and the mounting plate 10, so that the mounting cylinder 11 cannot move randomly relative to the mounting plate 10.

[0047] The sealing ring I 12, the sealing ring II 9 and the sealing ring III 25 are all made of rubber material, so that the deformed and stable properties of the rubber material can be utilized, and the sealing ring I 12, the sealing ring II 9 and the sealing ring III 25 can be made of silicone rubber material, so that the atmospheric aging resistance of the silicone rubber can be utilized.

[0048] A plurality of through holes 13 are provided on the lower end of the mounting cylinder 11 and the upper end of the mounting plate 10 from top to bottom, the gas can flow from the through hole 13 to the top cover 2 from the bottom tank 27, and fully contacts with the filter material during the flowing process.

[0049] A filter screen 16 is arranged on the lower end of the mounting plate 10 and the inner wall above the lower end of the mounting cylinder 11, respectively, so that the small adsorbent or reactant can be prevented from flowing out of the through hole 13.

[0050] A corresponding sliding groove III 20 is arranged on the mounting cylinder 11 for the U-shaped plate 8, the sliding groove III 20 can ensure the integration of the mounting plate 10 and the normal sliding of the mounting cylinder 11 relative to the mounting plate 10, and the lower end of the mounting plate 10 can be further provided with a blocking rod during actual use, so that the sliding groove III 20 on the mounting cylinder 11 is shielded, and the substances in the mounting cylinder 11 cannot flow out of the sliding groove III 20.

[0051] A metering mechanism is arranged on the mounting cylinder 11, so that the user can accurately know the mounting volume in the mounting cylinder 11, and the user can judge whether the mounting volume is suitable for the close contact of the filter material to ensure the filtering effect.

[0052] The metering mechanism comprises a mounting groove 23, a compression spring 24 is horizontally arranged in the mounting groove 23, the compression spring 24 is fixedly connected with a fixed block 21 at one end away from the mounting cylinder 11, the lower end of the mounting plate 10 is fixedly connected with a connecting rod 18, the connecting rod 18 is consistent in number with the fixed block 21, the connecting rod 18 is provided with a fixed groove 22 for the fixed block 21, a plurality of fixed grooves 22 are arranged on each connecting rod 18 from top to bottom, the mounting cylinder 11 can be limited by the cooperation of the fixed block 21 and the fixed groove 22, and the mounting cylinder 11 can have a plurality of relative heights due to the plurality of fixed grooves 22.

[0053] The upper and lower end faces of the fixed block 21 are arc faces, when the user pushes the mounting cylinder 11 upward or downward, the vertical pushing force applied by the user on the mounting cylinder 11 and the fixed block 21 can be converted into a horizontal pushing force through the arc face, so that the compression spring 24 can be compressed to release the cooperation between the fixed block 21 and the fixed groove 22, so that the user can slide the mounting cylinder 11 upward and downward at will without additional adjustment of the fixed block 21, and the stress difference of the fixed block 21 in and out of the fixed groove 22 can be perceived by the user, thereby playing a reminding effect.

[0054] Two L-shaped pipes 31 are arranged at one end of the two air inlet pipes 4 close to each other, and the two L-shaped pipes 31 are oppositely arranged, the horizontal end of the L-shaped pipe 31 is fixedly connected with the inner wall of the lower end of the bottom tank 27, that is, there is a certain distance between the lower end face of the L-shaped pipe 31 and the lower end of the air inlet pipe 4.

[0055] The relative height of the lower end of the air inlet pipe 4 is greater than the relative height of the inner wall of the lower end of the bottom tank 27, so that the bottom tank 27 can be used to load liquid reactants in actual use, and the adaptation range of the device is further improved, and specifically, lime water can be loaded to absorb carbon dioxide in waste gas, and the height difference can also be used to avoid the liquid reactant entering the air inlet pipe 4 as much as possible.

[0056] Working principle: in actual use, the types of impurities in the oxygen and anesthetic gas are roughly judged according to the storage time and position of the oxygen and anesthetic gas, and the appropriate filter is selected according to the types of impurities, and the number of filters is roughly determined to ensure that the filters can always play a role in actual use of the device.

[0057] Afterwards, the first layer of filter screen 16 is laid in the installation cylinder 11, the filter is respectively put into different installation cylinders 11, and the second layer of filter screen 16 is laid on the filter, at this time, a proper number of installation mechanisms should be selected, the relative sliding of the installation cylinder 11 and the installation plate 10 is realized by using the sliding groove I 19, the filter inside the installation cylinder 11 is compressed by using the metering mechanism, and the state thereof is ensured to meet the actual use requirement, and then the U-shaped plate 8 is embedded into the gap groove 6 by using the magnetic connection between the magnetic plate I 7 and the magnetic plate II 5, the relative fixation of the installation plate 10 is realized, and the filter screen 16 is laid on the filter.

[0058] Finally, the connecting ring II 30 is embedded into the connecting ring I 26, the installation ring 3 is rotated, the mutual cooperation between the fixing block 21 and the fixing groove 22 is realized, the compression process of the sealing ring III 25 is realized, at this time, the sealing connection between the installation ring 3 and the top cover 2 and the bottom tank 27 is realized, and the device can start normal work.

[0059] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for purifying anesthetic gases, characterized by: Including bottom tank (27), the bottom tank (27) is respectively connected with an air inlet pipe (4) on both sides, the upper end of bottom tank (27) is detachably connected with mounting ring (3), the upper end of mounting ring (3) is detachably connected with top cover (2), the inside of mounting ring (3) is detachably provided with multiple mounting mechanisms from top to bottom, the upper end of top cover (2) is provided with air outlet pipe (1); The mounting mechanism includes mounting plate (10), the lower end of mounting plate (10) is provided with mounting cylinder (11), the mounting plate (10) is provided with sliding groove I (19) for mounting cylinder (11), the upper end of mounting cylinder (11) is open structure, mounting cylinder (11) is slidably connected with mounting plate (10), mounting cylinder (11) moves up and down linearly relative to mounting plate (10); The cavity formed by mounting cylinder (11) and mounting plate (10) is placed with filter for absorbing water vapor and exhaust gas; The mounting cylinder (11) is provided with sealing ring I (12) outside, the sealing ring I (12) is interference fit with sliding groove I (19); Multiple through holes (13) are provided from top to bottom on the lower end of mounting cylinder (11) and the upper end of mounting plate (10); The mounting cylinder (11) is provided with metering mechanism; The metering mechanism includes mounting groove (23), the inside of mounting groove (23) is horizontally provided with compression spring (24), the end of compression spring (24) away from mounting cylinder (11) is fixedly connected with fixed block (21), the lower end of mounting plate (10) is fixedly connected with connecting rod (18), the number of connecting rod (18) is consistent with the number of fixed block (21), the connecting rod (18) is provided with fixed groove (22) for fixed block (21), multiple fixed grooves (22) are provided on a single connecting rod (18) from top to bottom.

2. An anaesthetic gas scavenging apparatus according to claim 1, wherein: The upper and lower end faces of fixed block (21) are arc faces.

3. An anaesthetic gas scavenging apparatus according to claim 1, wherein: The lower end of mounting plate (10) and the lower end of mounting cylinder (11) are respectively provided with a filter screen (16) above the inner wall.

4. An anesthetic gas scavenging apparatus according to claim 1, wherein: Two air inlet pipes (4) are respectively provided with an L-shaped pipe (31) on the end close to each other, and the two L-shaped pipes (31) are oppositely arranged, and the horizontal end of L-shaped pipe (31) is fixedly connected with the inner wall of the lower end of bottom tank (27); The relative height of the lower end of air inlet pipe (4) is greater than the relative height of the inner wall of the lower end of bottom tank (27).

5. An anesthetic gas scavenging apparatus according to claim 1, wherein: Multiple U-shaped plates (8) are embedded on the outer side of mounting plate (10), and the mounting plate (10) is located in the U-shaped opening of U-shaped plate (8), and the U-shaped plate (8) is slidably connected with the mounting plate (10); The end of U-shaped plate (8) away from mounting plate (10) is fixedly connected with magnetic plate I (7), the mounting ring (3) is provided with notch groove (6) for magnetic plate I (7), and the notch groove (6) is embedded with magnetic plate II (5); The part of mounting plate (10) not embedded in U-shaped plate (8) is fixedly connected with sealing ring II (9), and the sealing ring II (9) is interference fit with mounting ring (3); The mounting cylinder (11) is provided with sliding groove III (20) for U-shaped plate (8).

6. An anaesthetic gas scavenging apparatus as claimed in claim 5, wherein: The front and rear end faces of notch groove (6) are inclined faces. A rotating member (17) is arranged on the mounting plate (10).

7. An anaesthetic gas scavenging apparatus as claimed in claim 5, wherein: A limiting rod (15) is fixedly connected in the U-shaped opening of the U-shaped plate (8), and a sliding groove II (14) is arranged on the mounting plate (10) for the limiting rod (15).

8. An anesthetic gas scavenging apparatus according to claim 1, wherein: A connecting ring I (26) is arranged at each of the upper and lower ends of the mounting ring (3), a connecting ring II (30) is arranged at each of the ends of the bottom tank (27) and the top cover (2) close to the mounting ring (3), and the connecting ring II (30) can be embedded in the connecting ring I (26). A limiting block (28) is arranged in the inner ring of the connecting ring I (26), a limiting groove (29) is arranged on the connecting ring II (30) for the limiting block (28), and the upper end surface of the limiting groove (29) has a certain inclination. A sealing ring III (25) is arranged at each of the ends of the connecting ring I (26) away from the mounting ring (3), when the limiting block (28) is located at the relatively lowest point of the upper end surface of the limiting groove (29), the sealing ring III (25) is in interference fit with the bottom tank (27) and the top cover (2).

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