Dynamic airtight operation sleevelet system of negative pressure isolation sickbed and use method of dynamic airtight operation sleevelet system

Abstract

The invention discloses a dynamic airtight operation sleevelet system of a negative pressure isolation sickbed and a using method of the dynamic airtight operation sleevelet system, and relates to the technical field of medical isolation protection equipment.The dynamic airtight operation sleevelet system comprises a flexible sleevelet body connected to an isolation bulkhead, and the flexible sleevelet body comprises an arm sleeve section and a hand operation section which are sequentially connected; the dynamic airtight module is arranged on the hand back part of the hand operation section; the inflation expansion cavity is formed in the hand operation section; the sensing unit is arranged on the hand back part of the hand operation section and used for detecting the extraction state of the limbs of the user; the control unit is in signal connection with the sensing unit; inflation expansion is automatically triggered by sensing limb extraction actions, a dynamic sliding sealing interface is formed between an arm and the inner wall of the sleeve, a traditional static sealing mode depending on friction force is changed, the air tightness is guaranteed, meanwhile, the wearing and taking-off resistance is reduced, and operation is smooth and rapid.

Description

Technical Field

[0001] This invention relates to the field of medical isolation and protection equipment technology, specifically to a dynamic airtight operating sleeve system for a negative pressure isolation bed and its usage method. Background Technology

[0002] In fields such as infectious disease control, critical care isolation and treatment, and biosafety laboratories, negative pressure isolation beds are crucial equipment for preventing pathogen leakage and protecting the safety of medical personnel. Medical staff typically perform diagnostic and treatment procedures on patients through fixed operating sleeves (or "glove openings") located in the transparent window of the isolation chamber. These sleeves are generally made of flexible rubber or plastic, with elastic cuffs or adjustable straps at the ends to achieve a basic seal with the user's arm and maintain a negative pressure environment within the isolation chamber.

[0003] However, in practical applications, existing technologies often have openings with significant elasticity or adjustability because the sleeve openings need to fit snugly against the varying arm sizes of medical personnel to achieve a seal. When medical personnel insert or remove their arms from the sleeve, especially in emergency situations or when frequent entry and exit are required, the friction between the sleeve opening and the arm increases significantly, leading to difficulties in donning and doffing and delays in the procedure. More importantly, during the donning and doffing process, the sleeve opening may experience momentary local seal failure due to repeated stretching and friction, causing brief fluctuations in negative pressure within the isolation chamber and posing a risk of aerosol leakage. Summary of the Invention

[0004] The purpose of this invention is to provide a dynamic airtight operating sleeve system for negative pressure isolation beds and its usage method, so as to solve the problem that the existing traditional isolation sleeves rely on the elastic material at the port to fit tightly against the arm and palm to achieve static sealing, which results in high friction and sluggish movement when medical staff put on and take off the sleeves, which is particularly inconvenient in emergency or frequent operation situations.

[0005] Firstly, to achieve the above objectives, the present invention provides the following technical solution: a dynamic airtight operating sleeve system for a negative pressure isolation bed, comprising a flexible sleeve body connected to the isolation chamber wall, characterized in that the flexible sleeve body comprises an arm sleeve section and a hand operating section connected in sequence; the system further includes:

[0006] A dynamic airtight module is installed on the back of the hand in the hand operation section;

[0007] An inflation cavity is formed inside the hand operating section;

[0008] A sensing unit is disposed on the back of the hand in the hand operation section for detecting the withdrawal state of the user's limb;

[0009] The control unit is signal-connected to the sensing unit;

[0010] The gas source device is connected to the dynamic airtight module via a gas supply pipe and is controlled by the control unit;

[0011] The control unit is configured to: when the sensing unit detects that the limb is being withdrawn, control the air source device to expand the inflation chamber to form a dynamic sliding sealing interface between the limb and the flexible sleeve body.

[0012] Furthermore, a static sealing ring made of elastic material is provided on the inner side of the port of the arm sleeve section. An inserting collar is provided on the side of the static sealing ring away from the arm sleeve section. The axial cross section of the inserting collar is tapered, and its opening faces outward and gradually increases in size.

[0013] Furthermore, the hand operating section is made of a more flexible material than the arm sleeve section, the sensing unit includes at least one annular infrared position sensor disposed on the outside of the port of the arm sleeve section, and a pressure sensor disposed on the inner wall of the inflation chamber, and the air supply pipe is made of silicone material.

[0014] Furthermore, the isolation chamber wall is symmetrically provided with operating holes, and an installation retaining ring is provided in the operating hole. The installation retaining ring is a T-shaped ring body, and the outer wall of its T-shaped vertical section is provided with external threads and is detachably connected to the operating hole. The bottom of its T-shaped horizontal section is provided with a first sealing ring. When the installation retaining ring is installed in place, the first sealing ring is tightly attached to the isolation chamber wall.

[0015] Furthermore, the arm sleeve section is provided with a fixedly connected sealing sleeve. The sealing sleeve has a T-shaped cross-section. The mounting ring has a second sealing ring inside. The T-shaped vertical section of the sealing sleeve is inserted into the mounting ring and cooperates with the second sealing ring.

[0016] Furthermore, the outer wall of the T-shaped transverse section of the mounting ring is provided with annularly distributed positioning blocks, and each positioning block is rotatably connected to a buckle via a pin. The outer wall of the sealing sleeve is provided with a groove corresponding to the buckle, and the bottom of the T-shaped transverse section of the sealing sleeve is provided with a third sealing ring. When the sealing sleeve and the mounting ring are installed in place, the buckle rotates and engages in the groove, and the third sealing ring is pressed tightly between the sealing sleeve and the mounting ring.

[0017] Furthermore, it also includes a disinfection module, which includes a disinfection chamber installed on the wall of the isolation chamber. The disinfection chamber is connected to a disinfectant atomizing nozzle through a disinfection pipeline. The disinfectant atomizing nozzle is controlled by the control unit and continues to disinfect when the sensing unit detects that the limb is being pulled out.

[0018] The second aspect: In order to achieve the usage method described in the first aspect above, the following steps are included:

[0019] S1. The user passes his limb through the arm sleeve section and the static sealing ring, and inserts it into the hand operating section to perform operations inside the isolation chamber;

[0020] S2. When it is necessary to withdraw a limb, the sensing unit detects the withdrawal state in which the limb begins to move outward and transmits the signal to the control unit.

[0021] S3. After receiving the signal, the control unit immediately controls the air source device to supply air to the dynamic airtight module, so that the inflation expansion chamber expands, so that the flexible sleeve body is no longer in close contact with the person's palm and arm, forming a low-friction dynamic sliding sealing interface, allowing the limb to be smoothly pulled out.

[0022] S4. After the limb is completely withdrawn, the control unit controls the gas source device to stop supplying gas, and the gas inside the flexible sleeve body is discharged through the arm sleeve section.

[0023] S5. When the sensing unit confirms that the limb is being pulled outward, the control unit automatically activates the disinfectant atomizing nozzle to disinfect the continuously emerging arm and hand.

[0024] Compared with existing technologies, this invention provides a dynamic airtight operating sleeve system for negative pressure isolation beds and its usage method, by changing the traditional static tight-fitting seal to an intelligent responsive dynamic air cushion seal. When the sensing unit detects that the operator's limb begins to withdraw, the control unit immediately triggers the air source device, causing the inflation chamber in the hand operating section to expand rapidly, thereby forming a low-friction dynamic sliding seal interface between the limb and the inner wall of the sleeve. This innovative mechanism fundamentally solves the problem of sluggish movement and inefficient operation caused by high friction during the donning and doffing process. At the same time, it ensures that the seal interface is actively maintained throughout the entire dynamic process of limb movement, effectively preventing the instantaneous gaps that may occur due to repeated stretching of traditional sleeves, eliminating the risk of negative pressure fluctuations and aerosol leakage caused by this, and improving the safety, reliability, and ease of operation of the isolation equipment.

[0025] Furthermore, the entire "testing-inflation-sealing-venting" process is completed automatically by the system without manual intervention or adjustment, achieving intelligent operation. This not only reduces reliance on operator skills and improves response speed in emergencies, but also provides stronger safety guarantees for medical staff by maintaining a more stable internal pressure difference, and enhances the overall utilization efficiency of the isolation beds. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 A schematic diagram of the overall structure of the dynamic airtight operation sleeve system for the negative pressure isolation bed provided in this embodiment of the invention. Figure 1 ;

[0028] Figure 2 A schematic diagram of the overall structure of the dynamic airtight operation sleeve system for the negative pressure isolation bed provided in this embodiment of the invention. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of the flexible sleeve body and the extending collar and other components provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of components such as the hand operation section provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of components such as the arm sleeve section and the sealing sleeve provided in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram showing the disassembled structure of components such as the sealing sleeve and mounting ring provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of components such as the isolation chamber wall and the disinfection chamber provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Isolation chamber wall; 2. Flexible sleeve body; 201. Arm sleeve section; 202. Hand operating section; 3. Dynamic airtight module; 4. Inflatable expansion chamber; 5. Air source device; 6. Static sealing ring; 7. Insertion ring; 8. Annular infrared position sensor; 9. Pressure sensor; 10. Operating hole; 11. Mounting retainer; 12. First sealing ring; 13. Sealing sleeve; 14. Second sealing ring; 15. Positioning block; 16. Pin; 17. Buckle; 18. Slot; 19. Third sealing ring; 20. Disinfection chamber; 21. Disinfectant atomizing nozzle; 22. Disinfection pipeline; 23. Gas supply pipe. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] As attached Figure 1 To be continued Figure 6 As shown:

[0038] Example 1:

[0039] This invention provides a dynamic airtight operating sleeve system for a negative pressure isolation bed, comprising a flexible sleeve body 2 connected to the isolation chamber wall 1, characterized in that the flexible sleeve body 2 comprises an arm sleeve section 201 and a hand operating section 202 connected in sequence; the system further includes:

[0040] The dynamic airtight module 3 is disposed on the back of the hand of the hand operation section 202;

[0041] An inflation cavity 4 is formed inside the hand operation section 202;

[0042] A sensing unit is disposed on the back of the hand of the hand operation section 202 for detecting the withdrawal state of the user's limb;

[0043] The control unit is signal-connected to the sensing unit;

[0044] The gas source device 5 is connected to the dynamic airtight module 3 via the gas supply pipe 23 and is controlled by the control unit;

[0045] The control unit is configured to: when the sensing unit detects that the limb is being withdrawn, control the air source device 5 to inflate the inflation chamber 4 to form a dynamic sliding sealing interface between the limb and the flexible sleeve body 2.

[0046] It should be noted that the traditional static clamp seal has been replaced with a smart, responsive dynamic air cushion seal. When the sensing unit detects that the operator's limb is beginning to withdraw, the control unit immediately triggers the air source device 5, causing the inflation chamber 4 within the hand operating section 202 to rapidly expand, thereby forming a low-friction, dynamic sliding seal interface between the limb and the inner wall of the sleeve. This innovative mechanism fundamentally solves the problem of sluggish movement and inefficient operation caused by high friction during donning and doffing. Simultaneously, it ensures that the seal interface is actively maintained throughout the entire dynamic process of limb movement, effectively preventing instantaneous gaps that may occur due to repeated stretching of traditional sleeves, eliminating the risk of negative pressure fluctuations and aerosol leakage, and improving the safety, reliability, and ease of operation of the isolation equipment.

[0047] Furthermore, the entire "testing-inflation-sealing-venting" process is completed automatically by the system without manual intervention or adjustment, achieving intelligent operation. This not only reduces reliance on operator skills and improves response speed in emergencies, but also provides stronger safety guarantees for medical staff by maintaining a more stable internal pressure difference, and enhances the overall utilization efficiency of the isolation beds.

[0048] Specifically: The dynamic airtight module 3 includes a mesh air-conducting layer embedded in the material of the hand operating section 202 and a miniature one-way air inlet valve. When the air source device 5 supplies air, the gas enters the mesh air-conducting layer through the air supply pipe 23 and the one-way air inlet valve, and diffuses evenly between the inner and outer layers of the entire hand operating section 202 material, thereby causing it to expand evenly as a whole and form an air cushion around the limb.

[0049] The hand operating section 202 is formed by two layers of flexible films, inner and outer, sealed together along the edges. The enclosed space between them is the inflatable cavity 4. This cavity covers the palm, back of the hand, and finger area, and extends a certain length towards the wrist.

[0050] In this embodiment: a static sealing ring 6 made of elastic material is also provided on the inner side of the port of the arm sleeve section 201. An inserting collar 7 is provided on the side of the static sealing ring 6 away from the arm sleeve section 201. The axial cross section of the inserting collar 7 is tapered, and its opening faces outward and gradually increases.

[0051] It should be noted that the static sealing ring 6 constitutes the first basic seal, and the conical insertion collar 7 on it has multiple beneficial effects: First, its flared conical structure provides good guidance when the arm is inserted, facilitating quick and smooth insertion of the sleeve; second, the elastic insertion collar 7 can closely fit arms of different sizes, providing a reliable static seal when the arm is stationary inside the sleeve, maintaining the basic negative pressure of the isolation chamber; finally, this design, together with the subsequent dynamic airtight module 3, forms a "static-dynamic combination" dual sealing guarantee. The static sealing ring 6 is responsible for the normal sealing, while the dynamic module is responsible for the dynamic sealing during the insertion and removal process. The two work together to improve the overall sealing reliability and safety of the system.

[0052] In this embodiment: the hand operation section 202 is made of a flexible material that is softer than the arm sleeve section 201. The sensing unit includes at least one annular infrared position sensor 8 disposed on the outside of the port of the arm sleeve section 201, and a pressure sensor 9 disposed on the inner wall of the inflation chamber 4. The air supply pipe 23 is made of silicone material.

[0053] It should be noted that the hand operation section 202 uses a softer material to enhance the flexibility and tactile feedback of medical staff's hands, making delicate operations (such as injections and dressing changes) more convenient and accurate. The combined design of the sensing units enables precise status perception: the ring infrared position sensor 8 can detect changes in the arm's position relative to the sleeve port non-contactly, accurately identifying the "start withdrawing" action; while the pressure sensor 9, located in the inflation chamber 4, monitors the air pressure value in the chamber in real time, used to control the inflation degree, preventing over-inflation that could cause sleeve damage or under-inflation that could lead to insufficient sealing, ensuring the stable formation of the dynamic sliding sealing interface. The air supply tube 23, made of silicone, has excellent flexibility, extensibility, and biocompatibility, allowing it to bend with the movement of the sleeve and arm without easily falling off or breaking, and will not interfere with the operation, ensuring unobstructed airflow and system reliability.

[0054] Specifically: The ring-shaped infrared position sensor 8 monitors the arm position in real time. When it detects that the arm's movement speed towards the sleeve port continuously exceeds a preset threshold (e.g., greater than 0.1 m / s), it is determined that the limb is being withdrawn. The control unit then activates the air source device 5 (such as a miniature air pump) to supply air to the dynamic airtight module 3. Simultaneously, the pressure sensor 9 provides real-time feedback on the pressure value inside the inflation chamber 4. The control unit adjusts the air supply in a closed-loop control manner to stabilize the pressure inside the chamber within the preset optimal sealing pressure range (e.g., 0.5 kPa to 1.5 kPa). This pressure range is sufficient to form an effective air cushion seal while avoiding excessive pressure that could cause overstretching of the sleeve material or discomfort to the operator. When the infrared position sensor 8 detects that the arm has completely left its sensing area, it determines that the withdrawal is complete. The control unit immediately shuts off the air source device 5 and, preferably, opens a normally closed exhaust solenoid valve located on the dynamic airtight module 3 or the air supply pipe 23, allowing the gas inside the inflation chamber 4 to be quickly discharged, and the sleeve returns to its normal state for the next use.

[0055] In this embodiment: symmetrical operating holes 10 are provided on the isolation chamber wall 1, and an installation retaining ring 11 is provided in the operating hole 10. The installation retaining ring 11 is a T-shaped ring body. The outer wall of its T-shaped vertical section is provided with external threads and is detachably connected to the operating hole 10. The bottom of its T-shaped horizontal section is provided with a first sealing ring 12. When the installation retaining ring 11 is installed in place, the first sealing ring 12 is tightly attached to the isolation chamber wall 1.

[0056] It should be noted that the T-shaped structure and threaded connection of the mounting ring 11 achieve a stable and detachable connection with the isolation bulkhead 1. The external threaded connection facilitates rotational installation and locking, ensuring the robustness of the mechanical connection. The first sealing ring 12 (usually an O-ring or rubber gasket) at the bottom of the T-shaped transverse section is pressed against the surface of the isolation bulkhead 1 when the mounting ring 11 is tightened, forming the first critical static seal between the internal and external environments of the isolation chamber. This effectively prevents gas leakage from installation gaps and is a fundamental structural guarantee for maintaining a negative pressure environment. This design facilitates the overall installation, replacement, or maintenance of the sleeve system.

[0057] In this embodiment: the arm sleeve section 201 is provided with a fixedly connected sealing sleeve 13. The cross-section of the sealing sleeve 13 is T-shaped. The interior of the mounting ring 11 is provided with a second sealing ring 14. The T-shaped vertical section of the sealing sleeve 13 is inserted into the mounting ring 11 and cooperates with the second sealing ring 14.

[0058] It should be noted that this structure achieves a reliable connection and seal between the flexible sleeve body 2 and the rigid mounting ring 11. The sealing sleeve 13 serves as the installation interface for the sleeve, with its T-shaped vertical section inserted into the mounting ring 11. Through an interference fit or compression seal with the pre-set second sealing ring 14 (such as another O-ring) inside the mounting ring 11, a second important static seal is formed between the sleeve and the mounting component. This plug-in sealing structure can compensate for manufacturing and assembly tolerances, ensuring no leakage at the connection even under negative pressure, while allowing the sleeve to swing within a certain range to adapt to the operating posture without affecting the sealing performance.

[0059] In this embodiment: the outer wall of the T-shaped transverse section of the mounting ring 11 is provided with annularly distributed positioning blocks 15, and each positioning block 15 is rotatably connected to a buckle 17 via a pin 16. The outer wall of the sealing sleeve 13 is provided with a groove 18 corresponding to the buckle 17. The bottom of the T-shaped transverse section of the sealing sleeve 13 is provided with a third sealing ring 19. When the sealing sleeve 13 and the mounting ring 11 are installed in place, the buckle 17 rotates and engages in the groove 18, and the third sealing ring 19 is pressed tightly between the sealing sleeve 13 and the mounting ring 11.

[0060] It should be noted that this design provides a fast and reliable locking and sealing mechanism. The engagement of the snap 17 and the slot 18 enables quick locking and unlocking between the sleeve and the mounting base, allowing for tool-free installation or removal, facilitating clinical replacement, cleaning, or maintenance. When the snap 17 rotates and engages with the slot 18, a downward locking force is generated. This force compels the bottom of the T-shaped transverse section of the sealing sleeve 13 to press tightly against the mounting ring 11, thereby pressing the third sealing ring 19 (typically a flat sealing washer) at its bottom between the contact surfaces, forming a third static seal. This design, combining multiple mechanical locking and multi-layer sealing structures, ensures that the entire sleeve system connection on the isolation chamber possesses both extremely high mechanical stability and airtight reliability.

[0061] As attached Figure 1 , 2 As shown in Figure 7:

[0062] Example 2:

[0063] In this embodiment, a disinfection module is also included. The disinfection module includes a disinfection chamber 20 disposed on the isolation chamber wall 1. The disinfection chamber 20 is connected to a disinfectant atomizing nozzle 21 through a disinfection pipeline 22. The disinfectant atomizing nozzle 21 is controlled by the control unit and continues to disinfect during the process when the sensing unit detects that the limb is being pulled out.

[0064] It should be noted that the addition of the disinfection module constitutes another important safety enhancement feature of this system. Its working principle is as follows: when the sensing unit (such as an infrared sensor) detects that the arm is beginning to withdraw, the control unit simultaneously or slightly after activating the dynamic airtight module 3, and simultaneously activates the disinfection module. The disinfectant atomizing nozzle 21 (preferably located near or inside the arm sleeve section 201) sprays micron-level atomized disinfectant (such as hydrogen peroxide, hypochlorous acid, etc.), forming a disinfection fog curtain. Throughout the entire arm withdrawal process, the disinfection fog curtain continuously covers the skin of the arm and the inner wall of the sleeve. The beneficial effects of this design are: it enables real-time "through-and-through" disinfection of potentially contaminated exposed parts of the medical personnel's limbs and the inner cavity of the sleeve, reducing the risk of pathogens being carried out with the limbs and causing cross-contamination outside the isolation area. It provides additional active biosafety protection for the critical step before medical personnel remove their personal protective equipment (PPE), further enhancing the safety level of the entire isolation system.

[0065] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dynamic airtight operating sleeve system for a negative pressure isolation bed, comprising a flexible sleeve body (2) connected to an isolation cabin wall (1), characterized in that, The flexible sleeve body (2) includes an arm sleeve section (201) and a hand operating section (202) connected in sequence; the system also includes: A dynamic airtight module (3) is disposed on the back of the hand of the hand operation section (202); An inflation cavity (4) is formed inside the hand operating section (202); A sensing unit is disposed on the back of the hand in the hand operation section (202) for detecting the withdrawal state of the user's limb; The control unit is signal-connected to the sensing unit; The gas source device (5) is connected to the dynamic airtight module (3) through the gas supply pipe (23) and is controlled by the control unit; The control unit is configured to: when the sensing unit detects that the limb is being withdrawn, control the air source device (5) to inflate the inflation chamber (4) to form a dynamic sliding sealing interface between the limb and the flexible sleeve body (2).

2. A dynamic airtight operating sleeve system for a negative pressure isolation bed according to claim 1, wherein, A static sealing ring (6) made of elastic material is also provided on the inner side of the port of the arm sleeve section (201). The static sealing ring (6) is provided with an insertion ring (7) on the side away from the arm sleeve section (201). The axial cross section of the insertion ring (7) is tapered, and its opening faces outward and gradually increases.

3. The dynamic airtight operating sleeve system for a negative pressure isolation bed according to claim 1, characterized in that, The hand operation section (202) is made of a softer flexible material than the arm sleeve section (201). The sensing unit includes at least one annular infrared position sensor (8) disposed on the outside of the port of the arm sleeve section (201) and a pressure sensor (9) disposed on the inner wall of the inflation chamber (4). The air supply pipe (23) is made of silicone material.

4. The dynamic airtight operating sleeve system for a negative pressure isolation bed according to claim 1, characterized in that, The isolation chamber wall (1) is symmetrically provided with operating holes (10), and an installation retaining ring (11) is provided in the operating hole (10). The installation retaining ring (11) is a T-shaped ring body. The outer wall of its T-shaped vertical section is provided with external threads and is detachably connected to the operating hole (10). The bottom of its T-shaped horizontal section is provided with a first sealing ring (12). When the installation retaining ring (11) is installed in place, the first sealing ring (12) is tightly attached to the isolation chamber wall (1).

5. The dynamic airtight operating sleeve system for a negative pressure isolation bed according to claim 4, characterized in that, The arm sleeve section (201) is provided with a fixedly connected sealing sleeve (13). The cross-section of the sealing sleeve (13) is T-shaped. The interior of the mounting ring (11) is provided with a second sealing ring (14). The T-shaped vertical section of the sealing sleeve (13) is inserted into the mounting ring (11) and cooperates with the second sealing ring (14).

6. The dynamic airtight operating sleeve system for a negative pressure isolation bed according to claim 5, characterized in that, The T-shaped transverse section of the mounting ring (11) is provided with a ring-shaped distribution of positioning blocks (15). Each positioning block (15) is rotatably connected to a buckle (17) via a pin (16). The outer wall of the sealing sleeve (13) is provided with a groove (18) corresponding to the buckle (17). The bottom of the T-shaped transverse section of the sealing sleeve (13) is provided with a third sealing ring (19). When the sealing sleeve (13) and the mounting ring (11) are installed in place, the buckle (17) rotates and engages in the groove (18), and the third sealing ring (19) is pressed tightly between the sealing sleeve (13) and the mounting ring (11).

7. The dynamic airtight operating sleeve system for a negative pressure isolation bed according to claim 1, characterized in that, It also includes a disinfection module, which includes a disinfection chamber (20) set on the isolation chamber wall (1). The disinfection chamber (20) is connected to a disinfectant atomizing nozzle (21) through a disinfection pipeline (22). The disinfectant atomizing nozzle (21) is controlled by the control unit and continues to disinfect during the process when the sensing unit detects that the limb is being pulled out.

8. A method for using a dynamic airtight operating sleeve for a negative pressure isolation bed, applied to the system described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. The user passes his limb through the arm sleeve section (201) and the static sealing ring (6) and inserts it into the hand operation section (202) to perform the operation in the isolation chamber; S2. When it is necessary to withdraw a limb, the sensing unit detects the withdrawal state in which the limb begins to move outward and transmits the signal to the control unit. S3. After receiving the signal, the control unit immediately controls the air source device (5) to supply air to the dynamic airtight module (3), so that the inflation expansion chamber (4) expands, so that the flexible sleeve body (2) is no longer in close contact with the palm and arm of the person, forming a low-friction dynamic sliding sealing interface, allowing the limb to be smoothly pulled out. S4. After the limb is completely withdrawn, the control unit controls the gas source device (5) to stop supplying gas, and the gas inside the flexible sleeve body (2) is discharged through the arm sleeve section (201).

9. The method for using a dynamic airtight operating sleeve for a negative pressure isolation bed according to claim 8, characterized in that, Following step S4, a disinfection step is also included: S5. When the sensing unit confirms that the limb is being pulled outward, the control unit automatically activates the disinfectant atomizing nozzle (21) to disinfect the continuously emerging arm and hand.

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