Anesthesia gas constant pressure delivery device

Abstract

The application discloses anesthetic gas constant pressure conveying device, relates to the technical field of anesthetic gas conveying devices, and comprises a shell and a mixing assembly, wherein the lower central part of the shell is provided with the mixing assembly; the mixing assembly comprises a mixing pipe arranged in the shell, and a swing stirring shaft is rotationally connected in the mixing pipe; one end of the swing stirring shaft is connected with a transmission gear, and the swing stirring shaft is provided with a reset torsional spring on the side where the transmission gear is located. When the application is used, the pressure can be automatically balanced when pressure fluctuation occurs, so that the pressure balance is maintained, the gas mixing is assisted, the greater the fluctuation, the faster the mixing, the volume of the mixing cavity can be increased while the mixing is assisted, so that the gas residence time is increased, the gas mixing is uniform, and the air intake can be automatically and synchronously adjusted when the pressure fluctuation occurs, so that the device can recover the pressure balance faster and ensure the constant pressure conveying.

Description

Technical Field

[0001] This invention relates to the field of anesthetic gas delivery devices, specifically a constant pressure anesthetic gas delivery device. Background Technology

[0002] Inhalation anesthesia is a widely used method of anesthesia in clinical surgery. It involves a machine that mixes oxygen with evaporated anesthetic gas in a specific ratio and delivers the mixture to a breathing mask, allowing the gas to enter the patient's body through respiration and achieve an anesthetic effect. The stability of the anesthetic gas delivery pressure and the uniformity of the mixing directly affect the precise control of the depth of anesthesia and patient safety, making them core indicators in the design of anesthesia equipment. Current inhalation anesthesia machines typically employ independent pressure regulation and gas mixing units to control the oxygen output pressure and the evaporation rate of the anesthetic gas, respectively.

[0003] For example, patent CN204521867U discloses a constant-pressure delivery device for anesthetic gas, which uses a tubular equalizer with end caps at both ends. A sliding plunger is slidably installed in the inner cavity, and dynamic balance is achieved by the pressure of oxygen and anesthetic gas at both ends of the plunger. However, this device can only achieve pressure balance; gas mixing still relies on a separate mixing unit. When pressure fluctuations occur, the uniformity of the mixed gas is difficult to guarantee, and the mixing intensity decreases significantly under pressure equilibrium, mainly relying on the basic diffusion of gas molecules for mixing. Under steady-state conditions such as low-flow anesthesia or maintenance anesthesia, this passive mixing method is inefficient and easily leads to uneven drug concentration distribution, affecting the precise control of the depth of anesthesia. Summary of the Invention

[0004] The purpose of this invention is to provide a constant pressure delivery device for anesthetic gas to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A constant-pressure anesthetic gas delivery device includes a housing and a mixing assembly. The mixing assembly is located in the lower center of the housing. The mixing assembly includes a mixing tube disposed within the housing, and a oscillating stirring shaft is rotatably connected inside the mixing tube. One end of the oscillating stirring shaft is connected to a transmission gear, and a return torsion spring is disposed on the side of the oscillating stirring shaft where the transmission gear is located. The other end of the oscillating stirring shaft is connected to a pneumatic stirring shaft through a bearing seat and a bearing, and one end of the pneumatic stirring shaft is connected to a pneumatic impeller. An outlet pipe is connected to one side of the mixing tube, and adjusting springs are symmetrically connected to the bottom of the mixing tube. One end of the adjusting spring is connected to a base plate, and a column is connected to the center of the base plate.

[0006] Furthermore, the transmission gear is located on the outer side of the top of the mixing tube, the oscillating stirring shaft is elastically connected to the mixing tube through a reset torsion spring, and the stirring paddles on the oscillating stirring shaft are obliquely distributed on the shaft of the oscillating stirring shaft.

[0007] Furthermore, the pneumatic stirring shaft and pneumatic impeller are rotatably connected to the mixing tube, the base plate is elastically connected to the mixing tube through an adjusting spring, and the column is slidably connected to the mixing tube.

[0008] Furthermore, oxygen inlet pipes and anesthetic gas inlet pipes are symmetrically arranged on both sides of the mixing tube, and diaphragm one and diaphragm two are symmetrically arranged on the side of the oxygen inlet pipe and the anesthetic gas inlet pipe that are close to each other. A ball head is connected to the center of diaphragm one and diaphragm two, and a gas delivery pipe is arranged on the other side of the oxygen inlet pipe and the anesthetic gas inlet pipe.

[0009] Furthermore, both diaphragm one and diaphragm two are composed of a central rigid film and an outer elastic film. The oxygen inlet pipe and the anesthetic gas inlet pipe are both connected to the inside of the mixing pipe through a connecting port. The oxygen inlet pipe and the anesthetic gas inlet pipe are both connected to the inner wall of the outer shell. The gas delivery pipe and the gas outlet pipe penetrate the side wall of the outer shell to the outside.

[0010] Furthermore, a shaft is rotatably connected above the mixing tube via a bearing seat, and a crank handle is provided in the middle of the shaft handle. The crank handle is V-shaped, and both ends of the crank handle are engaged with ball heads.

[0011] Furthermore, the shaft is symmetrically provided with racks on both sides, and a double gear is meshed on one side of the rack at the front of the shaft. A rack is provided on one side of the double gear, and plugs are symmetrically connected to both ends of the rack. A sliding rod is connected between the plugs on the side away from the rack.

[0012] Furthermore, the rack is T-shaped, and the location of the rack teeth is an arc whose center coincides with the axis of the shaft. The rack on the rear side of the shaft meshes with the transmission gear, and the double gear is rotatably connected to the oxygen inlet pipe and the anesthetic gas inlet pipe through a bearing bracket.

[0013] Furthermore, the plug is conical, and the slide rod and rack are slidably connected to the oxygen inlet pipe and the anesthetic gas inlet pipe, and the rack meshes with the gear on the front side of the double gear.

[0014] Furthermore, the shaft is symmetrically connected to two wheels, and a rocker arm is rotatably connected to one side of the wheel. A connecting rod is rotatably connected to the lower end of the rocker arm, and an adjusting plate is connected to the lower end of the connecting rod. The adjusting plate is connected to the column.

[0015] This invention provides a constant-pressure delivery device for anesthetic gases, which has the following beneficial effects: during use, it can automatically balance the pressure when pressure fluctuations occur, thereby maintaining pressure balance and assisting in gas mixing. The greater the fluctuation, the faster the mixing. In addition, while assisting in mixing, it can increase the volume of the mixing chamber, thereby increasing the gas residence time and ensuring uniform gas mixing. Furthermore, when pressure fluctuations occur, it can automatically adjust the gas intake synchronously, thereby allowing the device to restore pressure balance more quickly and ensuring constant-pressure delivery.

[0016] 1. In use, if the pressure between the oxygen inlet pipe and the anesthetic gas inlet pipe is balanced, the oscillating stirring shaft can guide the airflow when the gas enters the mixing pipe, causing the airflow to form a vortex in the mixing pipe to assist in the mixing of the airflow. When the airflow passes through the lower part of the mixing pipe, the airflow velocity increases due to the reduction in the flow area. The pneumatic impeller can drive the pneumatic stirring shaft to rotate in the mixing pipe, stirring the airflow and ensuring that the airflow is mixed evenly in the mixing pipe. Since the pneumatic stirring shaft and the oscillating stirring shaft are connected by a bearing seat and bearing, the rotation of the pneumatic stirring shaft will not affect the oscillating stirring shaft, and the oscillating stirring shaft will not hinder the rotation of the pneumatic stirring shaft. The larger the gas flow rate, the faster the stirring speed, achieving the effect of adaptive adjustment of the stirring rate according to the gas flow rate, thus ensuring the gas mixing effect.

[0017] 2. In this invention, when the pressure inside the oxygen inlet tube increases, the air pressure inside the oxygen inlet tube will compress diaphragm one, thereby compressing diaphragm two via a rocker arm driven by a ball head. This reduces the volume inside the anesthetic gas inlet tube, increases the pressure inside the anesthetic gas inlet tube, and maintains pressure balance between the oxygen inlet tube and the anesthetic gas inlet tube. When the pressure inside the anesthetic gas inlet tube increases, diaphragm one, diaphragm two, and the rocker arm will move in the opposite direction to the above, thereby maintaining pressure balance between the oxygen inlet tube and the anesthetic gas inlet tube. Furthermore, when pressure fluctuations occur, the rocker arm can move synchronously via a shaft and a rack. The gear on the rear side of the shaft can drive the oscillating stirring shaft to rotate inside the mixing tube through the transmission gear and compress the return torsion spring, thereby assisting in the stirring of the airflow entering the mixing tube. The greater the pressure fluctuation, the faster the mixing. The more frequent the pressure fluctuation, the faster the oscillating stirring shaft swings. This achieves the effect of adaptive adjustment of the mixing efficiency of the oscillating stirring shaft to the airflow according to the pressure fluctuation. After the pressure between the oxygen inlet pipe and the anesthetic gas inlet pipe is balanced, the return torsion spring can drive the oscillating stirring shaft to return to its original position. The crank handle is also reset through the transmission gear and gear, allowing the oscillating stirring shaft to continue guiding the airflow.

[0018] 3. In this invention, when the rack on the front side of the crank handle rotates with the crank handle, it drives the plugs on both sides of the rack to move as a whole through a double gear and rack. The direction of movement is towards the side with higher pressure. Due to the conical shape of the plugs, the flow area at the end of the gas pipe can be changed when the plugs move, reducing the gas flow on the side with higher pressure and increasing the gas flow on the side with lower pressure. The greater the pressure difference, the greater the movement distance of the plugs, achieving the effect of adaptive adjustment of gas flow with pressure changes, and accelerating the achievement of pressure balance. When the shaft rotates, it can drive the wheel at both ends to rotate synchronously, so that the wheel passes through the crank handle. The linkage moves, causing the adjusting plate to descend through the column and the base plate inside the mixing tube, compressing the regulating spring to increase the volume inside the mixing tube, prolonging the residence time of the gas inside the mixing tube, allowing the gas to mix fully inside the mixing tube, and maintaining a constant output pressure of the mixed gas inside the mixing tube. After the crank handle is reset, the wheel will also drive the adjusting plate to reset through the crank and the linkage. The column moves with the adjusting plate and drives the base plate to reset with the assistance of the regulating spring, restoring the volume inside the mixing tube and preventing the mixed gas from stagnating inside the mixing tube. While assisting the base plate to reset, the regulating spring can also assist the crank handle to reset through the wheel and the shaft. Attached Figure Description

[0019] Figure 1 This is a three-dimensional exploded cross-sectional view of the mixing tube of a constant-pressure anesthetic gas delivery device according to the present invention. Figure 2 This is a schematic diagram of the overall three-dimensional structure of a constant pressure anesthetic gas delivery device according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a constant pressure anesthetic gas delivery device according to the present invention; Figure 4 This is a three-dimensional cross-sectional view of the anesthetic gas constant pressure delivery device of the present invention; Figure 5 This is a three-dimensional exploded view of the oxygen inlet pipe of a constant pressure anesthetic gas delivery device of the present invention. Figure 6 This is a three-dimensional structural diagram of the wheel of a constant-pressure anesthetic gas delivery device according to the present invention.

[0020] In the diagram: 1. Outer shell; 2. Mixing assembly; 201. Mixing pipe; 202. Oscillating stirring shaft; 203. Transmission gear; 204. Return torsion spring; 205. Pneumatic stirring shaft; 206. Pneumatic impeller; 207. Gas outlet pipe; 208. Adjusting spring; 209. Base plate; 210. Column; 3. Oxygen inlet pipe; 4. Anesthetic gas inlet pipe; 5. Diaphragm 1; 6. Diaphragm 2; 7. Ball head; 8. Gas delivery pipe; 9. Shaft; 10. Handle; 11. Gear rack; 12. Double gear; 13. Rack; 14. Plug; 15. Slide rod; 16. Wheel; 17. Rocker arm; 18. Connecting rod; 19. Adjusting plate. Detailed Implementation

[0021] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Please see Figures 1 to 6 The present invention provides a constant pressure delivery device for anesthetic gas, comprising a housing 1 and a mixing component 2. The mixing component 2 is disposed in the lower center of the housing 1. The mixing component 2 includes a mixing tube 201 disposed in the housing 1, and a swing stirring shaft 202 is rotatably connected inside the mixing tube 201. One end of the swing stirring shaft 202 is connected to a transmission gear 203, and a return torsion spring 204 is disposed on the side of the swing stirring shaft 202 where the transmission gear 203 is located. The other end of the swing stirring shaft 202 is connected to a pneumatic stirring shaft 205 through a bearing seat and a bearing, and one end of the pneumatic stirring shaft 205 is connected to a pneumatic impeller 206. An outlet pipe 207 is connected to one side of the mixing tube 201, and adjusting springs 208 are symmetrically connected to the bottom of the mixing tube 201. One end of the adjusting spring 208 is connected to a base plate 209, and a column 210 is connected to the center of the base plate 209.

[0023] Please see Figures 1 to 4 The transmission gear 203 is located on the outer side of the top of the mixing tube 201. The swing stirring shaft 202 is elastically connected to the mixing tube 201 through the return torsion spring 204. The stirring paddle on the swing stirring shaft 202 is inclinedly distributed on the shaft of the swing stirring shaft 202. The pneumatic stirring shaft 205 and the pneumatic impeller 206 are rotatably connected to the mixing tube 201. The bottom plate 209 is elastically connected to the mixing tube 201 through the adjustment spring 208. The column 210 is slidably connected to the mixing tube 201.

[0024] It should be noted that if the pressure between the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 is balanced, the oscillating stirring shaft 202 will not rotate under the action of the return torsion spring 204 when the gas enters the mixing pipe 201. Instead, it will guide the airflow, causing the airflow to form a vortex in the mixing pipe 201 to assist in mixing. When the airflow passes through the lower part of the mixing pipe 201, the airflow velocity increases due to the reduction in the flow area, thereby driving the pneumatic impeller 206 to rotate rapidly in the mixing pipe 201. This, in turn, drives the pneumatic stirring shaft 205 to rotate in the mixing pipe 201, stirring the airflow and ensuring that the airflow is mixed evenly in the mixing pipe 201. Since the pneumatic stirring shaft 205 and the oscillating stirring shaft 202 are connected by a bearing seat and bearing, the rotation of the pneumatic stirring shaft 205 will not affect the oscillating stirring shaft 202, and the oscillating stirring shaft 202 will not obstruct the rotation of the pneumatic stirring shaft 205.

[0025] Please see Figures 2 to 6 The mixing tube 201 is symmetrically equipped with an oxygen inlet pipe 3 and an anesthetic gas inlet pipe 4 on both sides. A diaphragm 1 5 and a diaphragm 2 6 are symmetrically arranged on the side of the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 that are close to each other. A ball head 7 is connected to the center of each diaphragm 1 5 and the diaphragm 2 6. A gas delivery pipe 8 is provided on the other side of each of the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4. Both the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 are connected to the interior of the mixing tube 201 through a connecting port. Both the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 are connected to the inner wall of the outer shell 1. The gas delivery pipe 8 and the gas outlet pipe 207 penetrate the side wall of the outer shell 1 to the outside. A shaft 9 is rotatably connected to the top of the mixing tube 201 via a bearing seat. A crank handle 10 is provided in the middle of the shaft 9. The crank handle 10 is V-shaped, and both ends of the crank handle 10 are engaged with the ball head 7. Gear racks 11 are symmetrically arranged on both sides of the shaft 9, and a double gear is meshed on one side of the gear rack 11 on the front side of the shaft 9. 12. A rack 13 is provided on one side of the double gear 12, and symmetrical plugs 14 are connected to both ends of the rack 13. A slide rod 15 is connected between the plugs 14 on the side away from the rack 13. The rack 11 is T-shaped, and the teeth of the rack 11 are arcs whose center coincides with the axis of the shaft 9. The rack 11 on the rear side of the shaft 9 meshes with the transmission gear 203. The double gear 12 is connected to the oxygen inlet pipe 3 and the anesthetic gas inlet through the bearing bracket. The tube 4 is rotatably connected, the plug 14 is conical, the slide rod 15 and the rack 13 are engaged and slidably connected with the oxygen inlet tube 3 and the anesthetic gas inlet tube 4, and the rack 13 meshes with the gear on the upper side of the double gear 12. The shaft 9 is symmetrically connected to the two ends of the wheel 16, and the rocker arm 17 is rotatably connected to one side of the wheel 16. The lower end of the rocker arm 17 is rotatably connected to the connecting rod 18, and the lower end of the connecting rod 18 is connected to the adjusting plate 19. The adjusting plate 19 is connected to the column 210.

[0026] In some embodiments, the diaphragm 5 and diaphragm 6 described above are both composed of a central rigid film and an outer elastic film.

[0027] Understandably, when the pressure inside the oxygen inlet tube 3 increases, the air pressure will squeeze the diaphragm 5, causing it to expand to the right, increasing the volume of the oxygen inlet tube 3. This will cause the crank handle 10 to squeeze the diaphragm 6, reducing the volume of the anesthetic gas inlet tube 4 and squeezing the gas inside, thereby increasing the pressure inside the anesthetic gas inlet tube 4 and maintaining a pressure balance between the oxygen inlet tube 3 and the anesthetic gas inlet tube 4.

[0028] When the pressure inside the anesthetic gas inlet tube 4 increases, the first diaphragm 5, the second diaphragm 6, and the rocker arm 17 will move in the opposite direction to the above, thereby maintaining the pressure balance between the oxygen inlet tube 3 and the anesthetic gas inlet tube 4. The engaging connection between the ball head 7 and the rocker arm 17 can ensure that the first diaphragm 5 and the second diaphragm 6 can rotate freely when the rocker arm 17 swings, avoiding jamming. When the rocker arm 17 rotates, it drives the rack 11 to move synchronously. When the rack 11 on the rear side of the shaft 9 moves, it drives the oscillating stirring shaft 202 to rotate inside the mixing tube 201, thereby assisting in the mixing of the gas, enhancing the mixing effect, and ensuring uniform gas mixing. After the pressure between the oxygen inlet tube 3 and the anesthetic gas inlet tube 4 is balanced, the reset torsion spring 204 drives the oscillating stirring shaft 202 to reset, and assists the crank handle 10 to reset. When the rack 10 rotates, the rack 11 on the front side of the crank handle 10 drives the sealing plugs 14 on both sides to move as a whole through the double gear 12 and rack 13. The direction of movement is towards the side with increased pressure, changing the flow area at the end of the gas delivery tube 8, reducing the gas inflow on the side with increased pressure, and increasing the gas inflow on the other side, thereby accelerating the recovery of the oxygen inlet tube 3 and the anesthetic gas inlet tube 4. The pressure balance between the gas inlet pipes 4 and the shaft 9 is maintained. When the shaft 9 rotates, the wheel 16 can drive the base plate 209 to descend in the mixing pipe 201 through the rocker arm 17, connecting rod 18, adjusting plate 19, and column 210, thereby increasing the volume in the mixing pipe 201, prolonging the residence time of the gas in the mixing pipe 201, allowing the gas to be fully mixed in the mixing pipe 201, and maintaining a constant output pressure of the mixed gas in the mixing pipe 201. After the crank handle 10 is reset, the wheel 16 will also drive the adjusting plate 19 to reset through the rocker arm 17 and connecting rod 18. The column 210 moves with the adjusting plate 19 and drives the base plate 209 to reset with the assistance of the regulating spring 208, restoring the volume in the mixing pipe 201. While assisting the base plate 209 to reset, the regulating spring 208 can also assist the crank handle 10 to reset through the wheel 16 and shaft 9.

[0029] When using this constant pressure anesthetic gas delivery device, oxygen and anesthetic gas are first introduced into the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 respectively from the inlet pipe. If the pressure between the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 is balanced, when the gas enters the mixing pipe 201, the oscillating stirring shaft 202 will not rotate under the action of the reset torsion spring 204, and will guide the airflow, so that the airflow forms a vortex in the mixing pipe 201 to assist the airflow in mixing. When the airflow passes through the lower part of the mixing tube 201, the airflow velocity increases due to the reduced flow area, which drives the pneumatic impeller 206 to rotate rapidly inside the mixing tube 201. This, in turn, drives the pneumatic stirring shaft 205 to rotate inside the mixing tube 201, stirring the airflow and ensuring that the airflow is mixed evenly within the mixing tube 201. Furthermore, since the pneumatic stirring shaft 205 and the oscillating stirring shaft 202 are connected by a bearing seat and bearing, the rotation of the pneumatic stirring shaft 205 will not affect the oscillating stirring shaft 202, and the oscillating stirring shaft 202 will not obstruct the rotation of the pneumatic stirring shaft 205. When the pressure inside the oxygen inlet pipe 3 increases, the air pressure inside the oxygen inlet pipe 3 will squeeze the diaphragm 5, causing it to expand to the right, increasing the volume of the oxygen inlet pipe 3. This will cause the rocker arm 10 to rotate around the shaft 9 via the ball head 7, and squeeze the diaphragm 6 via the ball head 7, causing it to protrude to the right, reducing the volume of the anesthetic gas inlet pipe 4 and squeezing the gas inside, thereby increasing the pressure inside the anesthetic gas inlet pipe 4, and maintaining a pressure balance between the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4. When the pressure inside the anesthetic gas inlet tube 4 increases, the first diaphragm 5, the second diaphragm 6, and the rocker arm 17 will move in the opposite direction to the above, thereby maintaining the pressure balance between the oxygen inlet tube 3 and the anesthetic gas inlet tube 4. The engaging connection between the ball head 7 and the rocker arm 17 can ensure that the first diaphragm 5 and the second diaphragm 6 can rotate freely when the rocker arm 17 swings, avoiding jamming. When the rocker arm 17 rotates, it can drive the rack 11 to move synchronously through the shaft 9. When the rack 11 on the rear side of the shaft 9 moves, it can drive the swing stirring shaft 202 to rotate in the mixing tube 201 through the transmission gear 203, thereby assisting in the mixing of the gas, enhancing the mixing effect of the gas, and ensuring that the gas is mixed evenly. When the swing stirring shaft 202 rotates, it will compress the reset torsion spring 204. After the pressure between the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4 is balanced, the reset torsion spring 204 can drive the swing stirring shaft 202 to reset, and assist the rocker arm 10 to reset through the transmission gear 203 and the rack 11. When the gear 11 on the front side of the crank handle 10 rotates with the crank handle 10, it will drive the double gear 12 to rotate, thereby driving the plugs 14 on both sides of the rack 13 to move as a whole, and the direction of movement is towards the side with increased pressure. Because of the conical shape of the plug 14, the plug 14 can change the flow area at the end of the gas delivery pipe 8 when it moves, thereby changing the gas flow rate, reducing the gas inflow on the side with increased pressure and increasing the gas inflow on the other side, thereby accelerating the restoration of pressure balance between the oxygen inlet pipe 3 and the anesthetic gas inlet pipe 4. When the shaft 9 rotates, it can drive the wheel 16 at both ends to rotate synchronously, so that the wheel 16 drives the connecting rod 18 to move downward on both sides of the mixing tube 201 through the rocker arm 17, thereby causing the adjusting plate 19 to drive the base plate 209 to descend in the mixing tube 201 through the column 210 and compress the regulating spring 208, so as to increase the volume in the mixing tube 201, prolong the residence time of the gas in the mixing tube 201, so that the gas can be fully mixed in the mixing tube 201, and maintain the output pressure of the mixed gas in the mixing tube 201 constant; After the crank handle 10 is reset, the wheel 16 will also drive the adjusting plate 19 to reset via the rocker arm 17 and the connecting rod 18. The column 210 moves with the adjusting plate 19 and drives the base plate 209 to reset with the assistance of the regulating spring 208, restoring the volume in the mixing tube 201. While assisting the base plate 209 to reset, the regulating spring 208 can also assist the crank handle 10 to reset via the wheel 16 and the shaft 9.

[0030] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A constant-pressure delivery device for anesthetic gas, characterized in that, The device includes a housing and a mixing assembly. The mixing assembly is located in the lower center of the housing. The mixing assembly includes a mixing tube disposed within the housing, and a oscillating stirring shaft is rotatably connected inside the mixing tube. One end of the oscillating stirring shaft is connected to a transmission gear, and a return torsion spring is disposed on the side of the oscillating stirring shaft where the transmission gear is located. The other end of the oscillating stirring shaft is connected to a pneumatic stirring shaft through a bearing seat and a bearing, and one end of the pneumatic stirring shaft is connected to a pneumatic impeller. An air outlet pipe is connected to one side of the mixing tube, and adjusting springs are symmetrically connected to the bottom of the mixing tube. One end of the adjusting spring is connected to a base plate, and a column is connected to the center of the base plate.

2. The constant pressure delivery device for anesthetic gas according to claim 1, characterized in that, The transmission gear is located on the outer side of the top of the mixing tube, and the oscillating stirring shaft is elastically connected to the mixing tube through a reset torsion spring. The stirring paddles on the oscillating stirring shaft are inclinedly distributed on the shaft of the oscillating stirring shaft.

3. The constant pressure delivery device for anesthetic gas according to claim 2, characterized in that, The pneumatic stirring shaft and pneumatic impeller are rotatably connected to the mixing tube, the base plate is elastically connected to the mixing tube through an adjusting spring, and the column is slidably connected to the mixing tube.

4. The constant pressure delivery device for anesthetic gas according to claim 3, characterized in that, The mixing tube is symmetrically provided with oxygen inlet pipes and anesthetic gas inlet pipes on both sides, and diaphragm one and diaphragm two are symmetrically provided on the side of the oxygen inlet pipe and anesthetic gas inlet pipe that are close to each other. A ball head is connected to the center of diaphragm one and diaphragm two. Gas delivery pipes are provided on the other side of the oxygen inlet pipe and anesthetic gas inlet pipe.

5. The constant pressure delivery device for anesthetic gas according to claim 4, characterized in that, Both diaphragm one and diaphragm two are composed of a central rigid film and an outer elastic film. The oxygen inlet pipe and the anesthetic gas inlet pipe are connected to the inside of the mixing pipe through a connecting port. The oxygen inlet pipe and the anesthetic gas inlet pipe are connected to the inner wall of the outer shell. The gas delivery pipe and the gas outlet pipe penetrate the side wall of the outer shell to the outside.

6. The constant pressure delivery device for anesthetic gas according to claim 5, characterized in that, A shaft is rotatably connected above the mixing pipe via a bearing seat, and a crank handle is provided in the middle of the shaft handle. The crank handle is V-shaped, and both ends of the crank handle are engaged with ball heads.

7. The constant pressure delivery device for anesthetic gas according to claim 6, characterized in that, The shaft is symmetrically arranged with racks on both sides, and a double gear is meshed on one side of the rack at the front of the shaft. A rack is arranged on one side of the double gear, and plugs are symmetrically connected to both ends of the rack. A sliding rod is connected between the plugs on the side away from the rack.

8. The constant pressure delivery device for anesthetic gas according to claim 7, characterized in that, The rack is T-shaped, and the teeth of the rack are located in an arc whose center coincides with the axis of the shaft. The rack on the rear side of the shaft meshes with the transmission gear. The double gear is rotatably connected to the oxygen inlet pipe and the anesthetic gas inlet pipe through a bearing bracket.

9. A constant-pressure anesthetic gas delivery device according to claim 8, characterized in that, The plug is conical, and the slide rod and rack are engaged and slidably connected with the oxygen inlet pipe and the anesthetic gas inlet pipe, and the rack meshes with the gear on the front side of the double gear.

10. A constant-pressure anesthetic gas delivery device according to claim 9, characterized in that, The shaft is symmetrically connected to two wheels, and a rocker arm is rotatably connected to one side of the wheel. A connecting rod is rotatably connected to the lower end of the rocker arm, and an adjustment plate is connected to the lower end of the connecting rod. The adjustment plate is connected to the column.

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