A tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof

Abstract

The present invention discloses a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof, which relates to the technical field of medical devices, and solves the problem in the prior art that the blocking device is separately provided, and is fixed to the tracheal cannula by a snap-fit ​​connection, which is easy to fall off, resulting in blocking failure, and the tracheal cannula can only be fully blocked, and the tracheal cannula cannot be adjusted and blocked step by step according to the patient's condition. The present invention proposes a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof, wherein an air outlet cylinder body is provided at the lower end of the air inlet pipe, and the air outlet cylinder body is movably connected to the blocking deep hole, and the movable cylinder is rotated to drive the air outlet cylinder body to move up and down, and the air outlet cylinder body is not completely placed in the blocking deep hole, and the air outlet hole exposed outside the blocking deep hole can be used normally, and the snap-fit ​​position of the air outlet cylinder body in the blocking deep hole is controlled to achieve adjustment of the tube blocking area, and the tube can be blocked step by step to meet the needs of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof. Background Art

[0002] At present, in clinical treatment, tracheotomy is a common means of establishing an artificial airway when rescuing critically ill patients. It is mainly aimed at rescuing critically ill patients, such as those with breathing difficulties due to brain trauma, laryngeal obstruction, severe lung infection, etc. Through the tracheotomy tube, the tracheotomy patient is given oxygen inhalation and sputum suction to restore the patency of the airway, improve the lung ventilation function, and facilitate the suction of lower respiratory tract secretions. Before extubation, the tracheotomy patient is clinically replaced with a metal tracheal tube and tested for tube blocking. After the test tube blocking is successful, the tube is extubated. There is currently no supporting material for the tube blocking of the metal tracheal tube. Clinically, the tube is blocked by finding materials by oneself, such as using syringes, corks, infusion bottle stoppers, etc. The above materials are limited in use by the catheter model, are difficult to disinfect, have the risk of inhalation, and fail to block the tube.

[0003] Chinese patent CN208974890U discloses a tracheal tube plugging device, including a large plugging cap and a small plugging cap, the large plugging cap includes an upper stopper and a lower truncated cone-shaped insertion portion, the axial center of the large plugging cap is provided with an air vent that runs through the upper and lower parts, the outer diameter of the stopper is larger than the outer diameter of the tracheal tube, the outer diameter of the bottom end of the insertion portion is smaller than the inner diameter of the tracheal tube, the small plugging cap is used to insert the air vent to plug the air vent, the large plugging cap also includes a cylindrical sealing portion, the upper and lower ends of the sealing portion are respectively connected to the stopper and the insertion portion, when the large plugging cap is inserted into the tracheal tube, the outer surface of the sealing portion is in sealing contact with the inner wall of the tracheal tube, and the lower surface of the stopper is in contact with the upper end surface of the tracheal tube. The utility model of the tracheal tube plugging device ensures the sealing between the sealing portion and the inner wall of the tracheal tube, so that the plugging is relatively tight, so as to prevent or reduce the situation where the plugging device is coughed out and causes the plugging failure.

[0004] Although this application solves the problems in the background technology to a certain extent, the following problems exist in this application: 1. The blocking device is set separately and fixed to the tracheal tube by a snap-fit ​​connection, which is easy to fall off, resulting in blocking failure; 2. The tracheal tube can only be fully blocked, and the tracheal tube cannot be adjusted and blocked step by step according to the patient's condition. Summary of the invention

[0005] The object of the present invention is to provide a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof, wherein a fixed annular blocking block is arranged inside the inner tube of the cannula, the movable cylinder is moved up and down by a first limiting slider and a first inclined slide groove, and the reverse lifting and lowering of the entire air intake pipe is realized by a second limiting slider and a second inclined slide groove, thereby controlling the blocking and opening of the tracheal cannula, which is easy to control and convenient to adjust; an air outlet cylinder body is arranged at the lower end of the air intake pipe, and the air outlet cylinder body is movably connected to the blocking deep hole, and the movable cylinder is rotated to drive the air outlet cylinder body to move up and down, and the air outlet cylinder body is incompletely It is placed in the blocking deep hole, and the air outlet hole exposed outside the blocking deep hole can be used normally. The engaging position of the air outlet cylinder in the blocking deep hole is controlled to achieve the adjustment of the blocking area, and the blocking can be carried out step by step to meet the needs of patients. A blocking cover is set at the port of the connecting pipe, which can be sealed for the second time to improve the blocking effect. At the same time, the barrel-shaped filter net can be covered when not in use to avoid pollution. After blocking the pipe, the second wavy bayonet is engaged with the first wavy bayonet, and the patient's mucus cannot contaminate the barrel-shaped filter net, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tracheal cannula with a tube blocking adjustment structure for medical critical care, comprising a tracheal cannula body and a control sealing sleeve, the tracheal cannula body comprising a cannula outer tube and a cannula inner tube, one end of the cannula outer tube is fixedly connected to one end of the cannula inner tube, a limited movable hole is provided at a position of the cannula outer tube close to the cannula inner tube, a first limited movable hole is provided on the inner wall of the limited movable hole, a control sealing sleeve is movably connected to the first limited sliding block, an annular blocking block is provided inside the cannula inner tube, the control sealing sleeve comprises a movable cylinder, an upper limiting ring and a blocking cover, an upper limiting ring is provided on the upper surface of the movable cylinder, a blocking cover is movably connected between the upper limiting ring and the movable cylinder, an air intake pipe is movably connected inside the movable cylinder, and the air intake pipe is movably connected to the inner tube of the cannula.

[0007] Furthermore, guide rods are symmetrically arranged on the inner wall of the inner tube of the sleeve, and the guide rods are movably connected to the air intake pipe.

[0008] Furthermore, limiting cross bars are symmetrically arranged on both sides of the lower end of the air intake pipe, a guide ring is arranged at one end of the limiting cross bar, the guide ring is sleeved with the guide rod, a connecting slot is opened at the upper end of the air intake pipe, a sealing plate is snap-connected in the connecting slot, and the sealing plate is snap-connected with the inner wall of the inner tube of the sleeve.

[0009] Furthermore, the upper end of the air intake pipe is fixedly connected to a connecting pipe, a filter sleeve is provided at the upper end of the connecting pipe, a second inclined groove is provided on the outer wall of the connecting pipe, and the second inclined groove is movably connected to the control sealing sleeve.

[0010] Furthermore, the filter sleeve includes a locking mounting ring and a barrel-shaped filter screen, the inner ring of the locking mounting ring is fixedly connected to the upper end of the barrel-shaped filter screen, and the locking mounting ring is fixedly connected to the upper end of the air intake pipe through a thread.

[0011] Furthermore, a first wavy bayonet is provided at the lower end of the air inlet pipe, and an air outlet cylinder body is provided at the middle position of the first wavy bayonet. The lower end of the air outlet cylinder body is a sealing structure, and spirally distributed air outlet holes are provided on the side wall of the air outlet cylinder body. The lower end of the air outlet cylinder body extends into the annular sealing block.

[0012] Furthermore, a deep sealing hole is opened in the center of the annular sealing block, which is snap-connected to the air outlet cylinder body. A second wavy bayonet is arranged around the upper end of the annular sealing block, the second wavy bayonet matches the first wavy bayonet, and a rubber sealing pad is arranged on the upper surface of the second wavy bayonet.

[0013] Furthermore, fixed support columns are arranged at equal distances around the lower end of the annular blocking block, and one end of the fixed support column is fixedly connected to the inner wall of the inner tube of the casing.

[0014] Furthermore, a rotating column is symmetrically arranged on the upper end of the movable cylinder, and the movable cylinder is fixedly connected to the lower surface of the upper limiting ring through the rotating column. A rotating block is arranged on one side of the sealing cover, and the rotating block is sleeved on the rotating column. A second limiting slider is arranged on the inner wall of the movable cylinder, and the second limiting slider is movably connected to the air intake pipe. A first inclined groove is arranged on the outer wall of the movable cylinder, and the first inclined groove is movably connected to the first limiting slider.

[0015] Another technical problem to be solved by the present invention is to provide a method for using a tracheal cannula with a tube blocking adjustment structure for medical critical care, comprising the following steps:

[0016] S1: The inner tube of the cannula is connected to the trachea of ​​the patient, the outer tube of the cannula is placed on the neck of the patient, the blocking cap is rotated to the outer position of the movable cylinder, the movable cylinder is rotated to make the movable cylinder sink, the connecting pipe rises, and the upper end of the connecting pipe extends out of the movable cylinder. The upper end of the connecting pipe can be connected to an oxygen device to supply oxygen to the patient;

[0017] S2: When trying to plug the tube, the movable cylinder is screwed upwards, the connecting pipe is sunk, the air outlet cylinder body is not completely placed in the plugged deep hole, and the air outlet holes exposed outside the plugged deep hole can be used normally. The depth of screwing the movable cylinder is controlled to adjust the number of air outlet holes exposed outside the plugged deep hole, and the plugging area of ​​the patient's tracheal cannula is adjusted as needed. The barrel-shaped filter performs air filtering, and when it is not completely blocked, it filters the breathing gas for the patient;

[0018] S3: When completely blocked, the movable cylinder is screwed upward to the maximum value, and the connecting pipe is sunk to the lowest point. At this time, the second wave-shaped bayonet is completely engaged with the first wave-shaped bayonet, and the blocked deep hole completely blocks the spirally distributed air outlet holes opened on the side wall of the air outlet cylinder body;

[0019] S4: The blocking cover rotates to the position between the movable cylinder and the upper limiting ring, and the lower surface of the blocking cover abuts against the upper surface of the filter sleeve, driving the first wavy bayonet at the lower end of the air inlet pipe to squeeze the rubber sealing gasket on the second wavy bayonet, and at the same time the blocking cover blocks the upper end of the connecting pipe.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention proposes a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof. A fixed annular blocking block is arranged inside the inner tube of the cannula. The movable cylinder is moved up and down by a first limiting slider and a first inclined slide groove. The second limiting slider and the second inclined slide groove are used to realize the reverse lifting and lowering of the entire air intake pipe, thereby controlling the blocking and opening of the tracheal cannula, which is easy to control and convenient to adjust.

[0022] 2. The present invention proposes a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof. An air outlet cylinder is arranged at the lower end of the air inlet pipe, and the air outlet cylinder is movably connected to the blocking deep hole. The movable cylinder is rotated to drive the air outlet cylinder to move up and down. The air outlet cylinder is not completely placed in the blocking deep hole, and the air outlet hole exposed outside the blocking deep hole can be used normally. The clamping position of the air outlet cylinder in the blocking deep hole is controlled to adjust the tube blocking area, and the tube can be blocked step by step to meet the needs of patients.

[0023] 3. The present invention proposes a tracheal cannula with a tube blocking adjustment structure for medical critical care and a method thereof. A blocking cover is provided at the port of the connecting pipe, which can perform secondary sealing to improve the tube blocking effect. At the same time, the barrel-shaped filter can be shielded when not in use to avoid contamination. After blocking the tube, the second wavy bayonet is engaged with the first wavy bayonet, and the patient's mucus cannot contaminate the barrel-shaped filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a pipe blocking state diagram of the present invention;

[0025] Figure 2 It is a structural diagram of the outer tube of the casing of the present invention;

[0026] Figure 3 It is a pipe-through state diagram of the present invention;

[0027] Figure 4 It is a structural diagram of the control sealing sleeve of the present invention;

[0028] Figure 5 The structure diagram of the air intake duct of the present invention;

[0029] Figure 6 An exploded view of the air intake duct of the present invention;

[0030] Figure 7 It is a structural diagram of the filter sleeve of the present invention;

[0031] Figure 8 This is a structural diagram of the annular blocking block of the present invention.

[0032] In the figure: 1. tracheal cannula body; 11. cannula outer tube; 111. limiting movable hole; 112. first limiting slider; 12. cannula inner tube; 121. guide rod; 2. control sealing sleeve; 21. movable cylinder; 211. rotating column; 212. second limiting slider; 213. first inclined slide groove; 22. upper limiting ring; 23. blocking cover; 3. annular blocking block; 31. blocking deep hole; 32. second wavy bayonet; 33. rubber sealing pad; 34. fixed support column; 4. air inlet pipe; 41. limiting cross bar; 411. guide ring; 42. connecting slot; 43. sealing plate; 44. connecting pipe; 441. second inclined slide groove; 45. filter sleeve; 451. locking mounting ring; 452. barrel filter; 46. first wavy bayonet; 47. air outlet cylinder body; 471. air outlet hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 3 A tracheal cannula with a tube blocking adjustment structure for medical critical care comprises a tracheal cannula body 1 and a control sealing sleeve 2, the tracheal cannula body 1 comprises a cannula outer tube 11 and a cannula inner tube 12, one end of the cannula outer tube 11 is fixedly connected to one end of the cannula inner tube 12, a limited movable hole 111 is provided at a position of the cannula outer tube 11 close to the cannula inner tube 12, a first limited movable hole 111 is provided on the inner wall of the limited movable hole 111, the control sealing sleeve 2 is movably connected to the first limited movable slide 112, a guide rod 121 is symmetrically provided on the inner wall of the cannula inner tube 12, the guide rod 121 is movably connected to the air intake pipe 4, the guide rod 121 is used to guide the air intake pipe 4, so that the air intake pipe 4 can only move up and down in the direction of the guide rod 121 to prevent the air intake pipe 4 from rotating.

[0035] See also Figure 4The control sealing sleeve 2 includes a movable cylinder 21, an upper limiting ring 22 and a blocking cover 23. The upper surface of the movable cylinder 21 is provided with an upper limiting ring 22, and the blocking cover 23 is movably connected between the upper limiting ring 22 and the movable cylinder 21. The interior of the movable cylinder 21 is movably connected with the air intake pipe 4. The upper end of the movable cylinder 21 is symmetrically provided with a rotating column 211, and the movable cylinder 21 is fixedly connected to the lower surface of the upper limiting ring 22 through the rotating column 211. A rotating block is provided on one side of the blocking cover 23, and the rotating block is sleeved with the rotating column 211. The blocking cover 23 can move between the movable cylinder 21 and the upper limiting ring 22 through the rotating block. When the blocking cover 23 rotates to the position between the movable cylinder 21 and the upper limiting ring 22, the lower surface of the blocking cover 23 abuts against the upper surface of the filter sleeve 45, thereby blocking the air intake pipe 4. When the blocking cover 23 rotates to the movable cylinder 2 1, the filter sleeve 45 is in a smooth state and can perform gas exchange. A second limiting slider 212 is provided on the inner wall of the movable cylinder 21, and the second limiting slider 212 is movably connected to the air intake pipe 4. A first inclined slide groove 213 is provided on the outer wall of the movable cylinder 21, and the first inclined slide groove 213 is movably connected to the first limiting slider 112. Rotating the movable cylinder 21 can drive the movable cylinder 21 to rotate and rise in the limiting movable hole 111, and the connecting pipe 44 can be driven to rise and fall through the second limiting slider 212. When the movable cylinder 21 rises, the connecting pipe 44 descends, and the connecting pipe 44 retracts into the movable cylinder 21. At this time, the connecting pipe 44 can be blocked by the blocking cover 23. When the movable cylinder 21 sinks, the connecting pipe 44 rises, and the upper end of the connecting pipe 44 extends out of the movable cylinder 21, and the upper end of the connecting pipe 44 can be connected to the oxygen device.

[0036] See also Figure 5-Figure 7The air intake pipe 4 is movably connected with the inner tube 12 of the sleeve. Limiting cross bars 41 are symmetrically arranged on both sides of the lower end of the air intake pipe 4. One end of the limiting cross bar 41 is provided with a guide ring 411. The guide ring 411 is sleeved with the guide rod 121. A connecting slot 42 is provided at the upper end of the air intake pipe 4. A sealing plate 43 is snap-connected in the connecting slot 42. The sealing plate 43 is snap-connected with the inner wall of the inner tube 12 of the sleeve. The sealing plate 43 is used for sealing the upper end of the inner tube 12 of the sleeve to prevent oxygen from overflowing from the upper end of the inner tube 12 of the sleeve during oxygen inhalation. A connecting pipe 44 is fixedly connected to the upper end of the air intake pipe 4. A filter sleeve 45 is provided at the upper end of the connecting pipe 44. A second inclined slide groove 441 is provided on the outer wall of the connecting pipe 44. The second inclined slide groove 441 is movably connected with the control sealing sleeve 2. The filter sleeve 45 includes a locking mounting ring 451 and a barrel-shaped filter screen 452. The inner ring of the locking mounting ring 451 is fixedly connected to the upper end of the barrel-shaped filter screen 452. The locking mounting ring 451 is fixedly connected to the upper end of the air intake pipe 4 through a thread, and air is filtered through the barrel-shaped filter screen 452. When it is not completely blocked, the breathing gas is filtered for the patient. The outer wall of the locking mounting ring 451 is an arc surface structure, which acts as a snap to facilitate the connection of the oxygen pipeline. The lower end of the air intake pipe 4 is provided with a first wavy bayonet 46, and an air outlet cylinder body 47 is provided in the middle position of the first wavy bayonet 46. The lower end of the air outlet cylinder body 47 is a sealing structure, and the side wall of the air outlet cylinder body 47 is provided with spirally distributed air outlet holes 471, and the lower end of the air outlet cylinder body 47 extends into the annular blocking block 3.

[0037] See also Figure 8 , an annular blocking block 3 is arranged inside the inner tube 12 of the sleeve, a blocking deep hole 31 is opened in the center of the annular blocking block 3, the blocking deep hole 31 is connected with the gas outlet cylinder body 47 by snapping, a second wavy bayonet 32 ​​is arranged around the upper end of the annular blocking block 3, the second wavy bayonet 32 ​​matches the first wavy bayonet 46, and a rubber sealing pad 33 is arranged on the upper surface of the second wavy bayonet 32, when the second wavy bayonet 32 ​​is snapped with the first wavy bayonet 46, the gas outlet cylinder body 47 is completely placed in the blocking deep hole 31, and the blocking deep hole 31 opens on the side wall of the gas outlet cylinder body 47 The spirally distributed air outlet holes 471 are completely blocked. When the second wavy bayonet 32 ​​is separated from the first wavy bayonet 46, the air outlet cylinder body 47 is not completely placed in the blocked deep hole 31. The air outlet holes 471 exposed outside the blocked deep hole 31 can be used normally. The engagement position of the air outlet cylinder body 47 in the blocked deep hole 31 is controlled to adjust the blocking area of ​​the pipe. Fixed support columns 34 are equidistantly arranged around the lower end of the annular blocking block 3. One end of the fixed support column 34 is fixedly connected to the inner wall of the inner tube 12 of the casing. The fixed support column 34 fixes the position of the annular blocking block 3.

[0038] In order to better demonstrate the implementation process of the tracheal cannula with a tube blocking adjustment structure for medical critical care, this embodiment now proposes a method for using the tracheal cannula with a tube blocking adjustment structure for medical critical care, including the following steps:

[0039] Step 1: connect the inner tube 12 of the cannula to the trachea of ​​the patient, place the outer tube 11 of the cannula at the neck position of the patient, rotate the blocking cover 23 to the outer position of the movable cylinder 21, rotate the movable cylinder 21, so that the position of the movable cylinder 21 sinks, and the connecting pipe 44 rises. The upper end of the connecting pipe 44 extends out of the movable cylinder 21, and the upper end of the connecting pipe 44 can be connected to the oxygen device to supply oxygen to the patient. The guide rod 121 is used to guide the air intake pipe 4, so that the air intake pipe 4 can only move up and down in the direction of the guide rod 121 to prevent the air intake pipe 4 from rotating. Rotating the movable cylinder 21 can drive the movable cylinder 21 to rotate and rise in the limit movable hole 111, and the connecting pipe 44 can be driven to rise and fall through the second limit slider 212;

[0040] Step 2: When trying to plug the tube, the movable cylinder 21 is screwed upward, the connecting pipe 44 is sunk, the air outlet cylinder body 47 is not completely placed in the plugging deep hole 31, and the air outlet holes 471 exposed outside the plugging deep hole 31 can be used normally. The depth of screwing the movable cylinder 21 is controlled to adjust the number of air outlet holes 471 exposed outside the plugging deep hole 31, and the plugging area of ​​the patient's tracheal cannula is adjusted as needed. The barrel-shaped filter 452 performs air filtering, and filters the breathing gas for the patient when it is not completely blocked;

[0041] Step 3: When completely blocked, the movable cylinder 21 is screwed upward to the maximum value, and the connecting pipe 44 sinks to the lowest point. At this time, the second wave-shaped bayonet 32 ​​is completely engaged with the first wave-shaped bayonet 46, and the blocking deep hole 31 completely blocks the spirally distributed air outlet holes 471 opened on the side wall of the air outlet cylinder body 47;

[0042] Step 4: The blocking cover 23 rotates to the position between the movable cylinder 21 and the upper limit ring 22, and the lower surface of the blocking cover 23 abuts against the upper surface of the filter sleeve 45, driving the first wavy bayonet 46 at the lower end of the air intake pipe 4 to squeeze the rubber sealing gasket 33 on the second wavy bayonet 32. The rubber sealing gasket 33 is deformed by the extrusion, which can improve the sealing effect. At the same time, the blocking cover 23 blocks the upper end of the connecting pipe 44, and the double seal can improve the sealing performance.

[0043] In summary, the medical critical care tracheal cannula and method thereof with a tube blocking adjustment structure are provided with a fixed annular blocking block 3 in the inner tube 12 of the cannula, and the movable cylinder 21 is moved up and down by the first limiting slider 112 and the first inclined slide groove 213, and the air intake pipe 4 is reversely lifted as a whole by the second limiting slider 212 and the second inclined slide groove 441, so as to control the blocking and opening of the tracheal cannula, which is easy to control and convenient to adjust; an air outlet cylinder body 47 is provided at the lower end of the air intake pipe 4, and the air outlet cylinder body 47 is movably connected to the blocking deep hole 31, and the movable cylinder 21 is rotated to drive the air outlet cylinder body 47 to move up and down, and the air outlet cylinder body 47 is moved up and down. The air cylinder body 47 is not completely placed in the blocking deep hole 31, and the air outlet hole 471 exposed outside the blocking deep hole 31 can be used normally. The engagement position of the air outlet cylinder body 47 in the blocking deep hole 31 is controlled to adjust the blocking area of ​​the pipe, and the pipe can be blocked step by step to meet the needs of the patient; a blocking cover 23 is provided at the port of the connecting pipe 44, which can perform secondary sealing to improve the blocking effect. At the same time, the barrel-shaped filter screen 452 can be covered when not in use to avoid pollution. After blocking the pipe, the second wavy bayonet 32 ​​is engaged with the first wavy bayonet 46, and the patient's mucus cannot contaminate the barrel-shaped filter screen 452.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tracheal tube with a tube blocking adjustment structure for medical critical care, comprising a tracheal tube body (1) and a control sealing sleeve (2), characterized in that: The tracheal cannula body (1) comprises a cannula outer tube (11) and a cannula inner tube (12); one end of the cannula outer tube (11) is fixedly connected to one end of the cannula inner tube (12); a limit movable hole (111) is provided at a position of the cannula outer tube (11) close to the cannula inner tube (12); a first limit movable slide block (112) is provided on the inner wall of the limit movable hole (111); a control sealing sleeve (2) is movably connected to the first limit movable slide block (112); and the cannula inner tube (111) is fixedly connected to the cannula inner tube (12); 2) is provided with an annular blocking block (3) inside, the control sealing sleeve (2) comprises a movable cylinder (21), an upper limiting ring (22) and a blocking cover (23), the upper limiting ring (22) is provided on the upper surface of the movable cylinder (21), the blocking cover (23) is movably connected between the upper limiting ring (22) and the movable cylinder (21), the interior of the movable cylinder (21) is movably connected with an air intake pipe (4), and the air intake pipe (4) is movably connected to the inner tube (12) of the casing; Guide rods (121) are symmetrically arranged on the inner wall of the sleeve inner tube (12), and the guide rods (121) are movably connected to the air intake pipe (4); Limiting cross bars (41) are symmetrically arranged on both sides of the lower end of the air intake pipe (4), one end of the limiting cross bar (41) is provided with a guide ring (411), the guide ring (411) is sleeved with the guide rod (121), a connecting groove (42) is provided at the upper end of the air intake pipe (4), a sealing plate (43) is snap-connected in the connecting groove (42), and the sealing plate (43) is snap-connected with the inner wall of the sleeve inner tube (12); The upper end of the air intake pipe (4) is fixedly connected to a connecting pipe (44), the upper end of the connecting pipe (44) is provided with a filter sleeve (45), the outer wall of the connecting pipe (44) is provided with a second inclined slide groove (441), and the second inclined slide groove (441) is movably connected to the control sealing sleeve (2); The filter sleeve (45) comprises a locking mounting ring (451) and a barrel-shaped filter screen (452); the inner ring of the locking mounting ring (451) is fixedly connected to the upper end of the barrel-shaped filter screen (452); and the locking mounting ring (451) is fixedly connected to the upper end of the air intake pipe (4) via a thread; The lower end of the air inlet pipe (4) is provided with a first wave-shaped bayonet (46), a gas outlet cylinder (47) is provided in the middle of the first wave-shaped bayonet (46), the lower end of the gas outlet cylinder (47) is a sealing structure, the side wall of the gas outlet cylinder (47) is provided with spirally distributed gas outlet holes (471), and the lower end of the gas outlet cylinder (47) extends into the annular blocking block (3); A deep sealing hole (31) is provided at the center of the annular sealing block (3), the deep sealing hole (31) is connected to the gas outlet cylinder (47) by snapping, a second wave-shaped bayonet (32) is provided around the upper end of the annular sealing block (3), the second wave-shaped bayonet (32) matches the first wave-shaped bayonet (46), and a rubber sealing pad (33) is provided on the upper surface of the second wave-shaped bayonet (32); Fixed support columns (34) are arranged at equal distances around the lower end of the annular blocking block (3), and one end of the fixed support column (34) is fixedly connected to the inner wall of the casing inner tube (12); A rotating column (211) is symmetrically arranged at the upper end of the movable cylinder (21), and the movable cylinder (21) is fixedly connected to the lower surface of the upper limiting ring (22) through the rotating column (211). A rotating block is arranged on one side of the blocking cover (23), and the rotating block is sleeved with the rotating column (211). A second limiting slider (212) is arranged on the inner wall of the movable cylinder (21), and the second limiting slider (212) is movably connected to the air intake pipe (4). A first inclined slide groove (213) is arranged on the outer wall of the movable cylinder (21), and the first inclined slide groove (213) is movably connected to the first limiting slider (112).

Images