Portable chest drainage device

Abstract

The invention belongs to the technical field of medical instruments, and particularly discloses a portable chest drainage device which comprises a base plate. The water seal tank and the negative pressure adjusting tank are arranged on the chassis; the barrel cover is arranged on the chassis and surrounds the water seal tank and the negative pressure adjusting tank; the autonomous replacement mechanism is rotationally arranged on the outer side of the barrel cover; the driving mechanism is used for driving the autonomous replacement mechanism to rotate; the automatic replacement mechanism comprises an upper connecting ring coaxially arranged at the upper end of the barrel cover in a sleeving mode, a lower connecting ring coaxially arranged at the lower end of the barrel cover in a sleeving mode and a plurality of n-shaped frames which are connected between the upper connecting ring and the lower connecting ring and annularly and evenly distributed, and liquid accumulation boxes are inserted into the n-shaped frames in a sealed mode. A plurality of liquid accumulation boxes are integrated through the annular autonomous replacement mechanism, when it is detected that accumulated liquid reaches a threshold value, the mechanism drives the annular assembly to rotate rapidly and switch to the empty liquid accumulation box, in the switching process, a drainage pipeline and all cavities are automatically closed, the negative pressure of the system is kept constant, and the empty liquid accumulation box is automatically conducted after being in place; therefore, the automatic replacement of the liquid accumulation box is realized.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically referring to a portable chest drainage device. Background Technology

[0002] Thoracic drainage is a crucial step in post-thoracic surgery and chest trauma treatment. Its main purpose is to drain accumulated air and fluid from the pleural cavity, restore negative pressure, and promote lung re-expansion. In current clinical practice, the traditional "three-bottle" water-seal drainage system remains the mainstream portable drainage device. This traditional portable three-bottle drainage system mainly consists of a pleural effusion bottle, a water-seal bottle, and a negative pressure regulating bottle connected in series via tubing. Its working logic is as follows: the drainage tube in the patient's chest cavity is first connected to the pleural effusion bottle to collect and measure the drained fluid; the gas outlet of the pleural effusion bottle is connected to the long tube of the water-seal bottle, utilizing a one-way valve mechanism (i.e., the water seal principle) formed by the water column to prevent backflow of outside air into the pleural cavity; the gas outlet of the water-seal bottle is then connected to the negative pressure regulating bottle, which controls the maximum negative pressure value in the system by adjusting the depth of the pressure regulating tube, which is connected to the atmosphere and inserted below the water surface; finally, it is connected to the hospital's central negative pressure source. However, in terms of practical operation and precise nursing care, the existing three-bottle drainage device has significant technical limitations, specifically in the following aspects: First, existing drainage bottles have a fixed volume. When a patient experiences significant postoperative drainage or active bleeding, the fluid level in the bottle rises rapidly. If not addressed promptly, an excessively high fluid level not only alters the hydrostatic balance of the system and increases drainage resistance, but may even cause fluid to be drawn back into the water-seal bottle, compromising the system's one-way seal. This necessitates frequent bedside rounds and fluid level monitoring by medical staff, significantly increasing the workload of clinical nursing and posing a risk of drainage failure due to human error.

[0003] Secondly, when the drainage bottle is full and needs to be emptied or replaced, a complex disconnection and reconnection procedure must be performed. Medical staff must first use hemostatic forceps to double-clamp the proximal end of the drainage tube to physically isolate the chest cavity from the outside environment, and then shut off the central negative pressure source. Improper clamping can easily lead to pneumothorax or retrograde infection, requiring extremely high levels of procedural precision and airtightness.

[0004] Third, after the accumulated fluid is drained and the tubing is reconnected, the system does not immediately return to its optimal operating state. Medical staff need to restart the negative pressure source and readjust the water column height in the negative pressure regulating bottle to set the target negative pressure value. This requires a rebalancing process, which cannot meet the stringent requirements of modern medicine for continuous and constant drainage. Summary of the Invention

[0005] To address the above issues, this invention provides a portable thoracic drainage device that integrates multiple effusion tanks via a ring-shaped self-changing mechanism. When the detected effusion reaches a threshold, the mechanism drives the ring component to rotate rapidly and switch to an empty effusion tank. During the switching process, the drainage tubing and each chamber are automatically closed to maintain a constant negative pressure in the system. Once the empty effusion tank is in place, the system automatically opens, thus achieving automatic replacement of the effusion tanks. This avoids cumbersome manual operation and pressure fluctuations, enabling portable, efficient, and continuous drainage.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a portable chest drainage device, including a chassis, a water seal box and a negative pressure regulating box disposed on the chassis, a cylindrical cover disposed on the chassis surrounding the water seal box and the negative pressure regulating box, an autonomous replacement mechanism rotatably disposed on the outside of the cylindrical cover, and a drive mechanism for driving the autonomous replacement mechanism to rotate.

[0007] Furthermore, the autonomous replacement mechanism includes an upper connecting ring coaxially sleeved on the upper end of the cylinder cover, a lower connecting ring coaxially sleeved on the lower end of the cylinder cover, and a plurality of C-shaped frames evenly distributed in an annular arrangement connecting the upper connecting ring and the lower connecting ring. A liquid accumulation tank is sealed and inserted inside the C-shaped frame, and a laser beam sensor pointing to the internal liquid accumulation tank is provided on the upper outer side of the C-shaped frame.

[0008] Furthermore, an mounting ring is coaxially fixed on the outer side of the upper end of the cylinder cover. The upper surface of the upper connecting ring is sealed and rotatedly fitted with the lower surface of the mounting ring, and the lower surface of the lower connecting ring is rotatedly fitted with the upper surface of the chassis.

[0009] Furthermore, the open side of the C-shaped frame is positioned away from the axis of the cylindrical cover, the upper end of the liquid collection tank is open and has a sealing layer, the upper end face of the liquid collection tank is sealed and tightly attached to the lower surface of the upper connecting ring, the lower end face of the liquid collection tank is tightly attached to the upper surface of the lower connecting ring, and multiple sets of first through holes and second through holes are arranged in a circumferential array along the axis of the upper connecting ring, with each set of first through holes and second through holes located at the center of the corresponding cross-section of the C-shaped frame.

[0010] Furthermore, the water seal box is provided with a water seal tube, and the mounting ring is provided with a drainage tube for connecting to the patient's chest cavity. One end of the water seal tube and one end of the drainage tube both extend downward to the lower surface of the mounting ring. The second through hole is located outside the first through hole in the radial direction of the upper connecting ring. During the entire rotation of the upper connecting ring, the water seal tube and the drainage tube can be simultaneously aligned and connected with the first and second through holes of each group.

[0011] Furthermore, the outer periphery of the mounting ring is provided with an annular groove with the opening facing downwards, and the outer periphery of the upper connecting ring is provided with a retaining ring extending upwards. The retaining ring is rotatably inserted into the annular groove. The retaining ring is provided with a plurality of third through holes arranged in a circumferential array on the radial side. The number of the third through holes is the same as the number of the first through holes and the second through holes. The annular groove is provided with a fourth through hole that penetrates both of its groove walls on the radial side.

[0012] Furthermore, the negative pressure regulating box is provided with a first negative pressure source pipe, which is connected to a fourth through hole on the inner side wall of the annular groove, and a second negative pressure source pipe is provided on the outer side of the annular groove; one end of the second negative pressure source pipe is connected to the fourth through hole on the outer side wall of the annular groove, and the other end is used to connect to the central negative pressure source; when the upper connecting ring rotates so that the first through hole and the second through hole are connected to the water seal pipe and the drainage pipe respectively, the corresponding third through hole is simultaneously connected to the fourth through hole.

[0013] Furthermore, the drive mechanism includes a servo motor fixed below the chassis, a gear located at the output end of the servo motor, and an outer gear ring fixed to the outer circumference of the lower connecting ring, wherein the gear meshes with the outer gear ring for transmission.

[0014] Furthermore, a handle is provided on the outer side of the liquid collection tank, and a retaining strip is provided at one end of the C-shaped frame to prevent the liquid collection tank from falling out. Both the C-shaped frame and the liquid collection tank are made of transparent material.

[0015] Furthermore, the water seal tank and the negative pressure regulating tank are connected by a connecting pipe, and a pressure regulating pipe is inserted into the negative pressure regulating tank; the upper end of the pressure regulating pipe is connected to the atmosphere, and the lower end is inserted below the liquid surface of the negative pressure regulating tank.

[0016] Furthermore, when the laser beam sensor detects that the liquid in the sump is blocking the optical path, it controls the servo motor to drive the autonomous replacement mechanism to rotate by one station angle, so that the current first through hole, second through hole and third through hole are misaligned and disconnected from the pipeline formed by the water seal pipe, the drainage pipe and the fourth through hole, respectively, until the pipeline formed by the next station is connected and stops.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows: (1) This invention integrates multiple liquid collection tanks through an autonomous replacement mechanism and uses a laser beam sensor for real-time monitoring, which effectively solves the pain points of existing liquid collection bottles with fixed volume and the need for high-frequency manual inspection. When the liquid collection reaches the threshold, the drive mechanism can automatically drive the ring component to rotate quickly and switch the full-load liquid collection tank to an empty position. This design avoids the risk of changing the hydrostatic pressure balance of the system due to excessive liquid level, increasing drainage resistance, or causing liquid to be sucked back into the water seal tank. While significantly reducing the clinical nursing load of medical staff, it also eliminates the safety hazard of drainage failure due to human negligence.

[0018] (2) This invention utilizes the rotational engagement mechanism of the upper connecting ring and the retaining ring to solve the complex disconnection and reconnection procedures in traditional replacement operations. During the rotational switching process of the autonomous replacement mechanism, the physical part of the upper connecting ring automatically double-closes the ports of the drainage tube and the water seal tube, and the retaining ring simultaneously cuts off the connection of the negative pressure source pipeline, realizing the automatic physical isolation and sealing of the pipeline. This mechanism completely eliminates the cumbersome steps of relying on medical staff to clamp the drainage tube with hemostatic forceps and manually shut off the negative pressure source in traditional operations, fundamentally eliminating the risk of pneumothorax and retrograde infection caused by improper human operation or inadequate clamping, and greatly improving the standardization and airtightness of the operation.

[0019] (3) This invention solves the problem of time delay in rebalancing negative pressure after changing the effusion bottle in traditional devices by using a unique pressure-holding switching design. During the switching interval, the air pressure in the water seal box and the negative pressure regulating box is sealed and maintained, and the bottom of the pressure regulating pipe is sealed by the liquid surface to maintain static pressure balance. When the new effusion box is connected, the system does not need to restart the negative pressure source or adjust the water column height to rebuild the vacuum. It can immediately restore to the predetermined constant negative pressure value. This seamless working mode realizes continuous drainage, avoids the potential impact of pressure fluctuations on the patient's pleural cavity, and meets the strict requirements of modern medicine for postoperative drainage stability. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a portable chest drainage device proposed in this invention.

[0021] Figure 2 This is a schematic diagram of the exploded structure of a portable chest drainage device proposed in this invention.

[0022] Figure 3 This is a top view of a portable chest drainage device proposed in this invention.

[0023] Figure 4 for Figure 3 Sectional view of AA.

[0024] Figure 5 This is an exploded structural diagram showing the relationship between the autonomous replacement mechanism and the hood position of a portable chest drainage device proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the water seal box and negative pressure regulating box of a portable chest drainage device proposed in this invention.

[0026] Figure 7 for Figure 4 Enlarged view of section B.

[0027] Figure 8 for Figure 5 Enlarged view of section C.

[0028] Figure 9 This is a schematic diagram showing the structural relationship between the mounting ring and the ring groove of a portable chest drainage device proposed in this invention.

[0029] Figure 10 for Figure 1 Enlarged view of section D.

[0030] The components include: 1. Chassis; 2. Water seal box; 21. Connecting pipe; 22. Water seal pipe; 23. Drainage pipe; 3. Negative pressure regulating box; 31. First negative pressure source pipe; 32. Pressure regulating pipe; 4. Cylinder cover; 41. Mounting ring; 42. Ring groove; 43. Second negative pressure source pipe; 44. Fourth through hole; 5. Self-replacing mechanism; 51. Upper connecting ring; 52. Lower connecting ring; 53. C-shaped frame; 54. Retaining ring; 55. First through hole; 56. Second through hole; 57. Third through hole; 6. Liquid accumulation tank; 61. Handle; 62. Locking strip; 7. Drive mechanism; 71. Servo motor; 72. Gear; 73. External gear ring; 8. Laser beam sensor.

[0031] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10As shown, the present invention proposes a portable chest drainage device, which mainly includes a chassis 1, a tube cover 4 mounted on the chassis 1, a self-replacing mechanism 5 rotatably mounted on the outside of the tube cover 4, and a drive mechanism 7.

[0035] Specifically, a water seal box 2 and a negative pressure regulating box 3 are fixedly installed at the center of the chassis 1. The water seal box 2 and the negative pressure regulating box 3 are connected by a connecting pipe 21 to form a series structure of air passages. The cylinder cover 4 is coaxially fixed on the chassis 1 and surrounds the water seal box 2 and the negative pressure regulating box 3, playing a protective and support role.

[0036] To enable automatic switching and pipeline connection of the liquid collection tank 6, an mounting ring 41 is coaxially fixed on the outer side of the upper end of the casing 4. The self-replacing mechanism 5 includes an upper connecting ring 51 coaxially sleeved on the upper end of the casing 4, a lower connecting ring 52 coaxially sleeved on the lower end of the casing 4, and multiple C-shaped frames 53 connecting the upper connecting ring 51 and the lower connecting ring 52. The upper surface of the upper connecting ring 51 is sealed and rotatedly fitted with the lower surface of the mounting ring 41, and the lower surface of the lower connecting ring 52 is rotatedly fitted with the upper surface of the chassis 1, so that the entire self-replacing mechanism 5 can rotate around the axis of the casing 4. The C-shaped frames 53 are evenly distributed along the circumferential direction, and their open sides are set away from the axial direction of the casing 4 for inserting the liquid collection tank 6.

[0037] The effusion tank 6 is sealed and inserted into the U-shaped frame 53. The upper end of the effusion tank 6 is open and has a sealing layer. When the effusion tank 6 is inserted into place, its upper end face is sealed and tightly attached to the lower surface of the upper connecting ring 51 through the sealing layer, and its lower end face is tightly attached to the upper surface of the lower connecting ring 52. In order to facilitate observation of the liquid level and the characteristics of the effusion, both the U-shaped frame 53 and the effusion tank 6 are made of transparent material. The outer side of the effusion tank 6 is provided with a handle 61 for easy insertion and removal by medical staff. One end of the U-shaped frame 53 is equipped with a locking strip 62 to prevent the effusion tank 6 from falling out and to ensure stability during rotation.

[0038] The core of this embodiment lies in the on / off control method of the gas-liquid pipeline. For each C-shaped frame 53 (i.e., the workstation of each liquid collection tank 6), a set of first through holes 55 and second through holes 56 are provided on the upper connecting ring 51. The first through holes 55 and second through holes 56 of each set are located within the center position range of the cross section of the corresponding C-shaped frame 53, and the second through hole 56 is located outside the first through hole 55 in the radial direction of the upper connecting ring 51.

[0039] Regarding the static interface, the water seal box 2 is equipped with a water seal pipe 22, and the mounting ring 41 is equipped with a drainage tube 23 for connecting to the patient's chest cavity. One end of the water seal pipe 22 and one end of the drainage tube 23 both extend downward to the lower surface of the mounting ring 41. When the upper connecting ring 51 rotates to the working position, the water seal pipe 22 and the drainage tube 23 can be aligned and connected with a set of first through holes 55 and second through holes 56 of the current working position at the same time. At this time, the drainage tube 23 introduces liquid into the sump 6 through the second through hole 56, and the gas in the sump 6 enters the water seal pipe 22 through the first through hole 55.

[0040] To achieve synchronous on / off control of the negative pressure source, the outer periphery of the mounting ring 41 is provided with an annular groove 42 with the slot facing downward. The outer periphery of the upper connecting ring 51 is provided with a retaining ring 54 extending upward. The retaining ring 54 is inserted into the annular groove 42 in a sealed and rotatable manner. The retaining ring 54 has multiple third through holes 57 arranged in a circular array on the radial side. The number of third through holes 57 is the same as the number of sets of first through holes 55 and second through holes 56. The annular groove 42 has a fourth through hole 44 that penetrates the inner and outer groove walls on the radial side.

[0041] The negative pressure regulating box 3 is equipped with a first negative pressure source pipe 31. In this embodiment, the first negative pressure source pipe 31 is set opposite to the drainage pipe 23, and one end of it is connected to the fourth through hole 44 on the inner side wall of the annular groove 42. A second negative pressure source pipe 43 is provided on the outer side of the annular groove 42. One end of the second negative pressure source pipe 43 is connected to the fourth through hole 44 on the outer side wall of the annular groove 42, and the other end is used to connect to the central negative pressure source of the hospital. When the upper connecting ring 51 rotates so that the first through hole 55 and the second through hole 56 are connected to the water seal pipe 22 and the drainage pipe 23 respectively, the corresponding third through hole 57 is simultaneously connected to the inner and outer fourth through holes 44, thereby opening the negative pressure circuit.

[0042] In addition, a pressure regulating pipe 32 is inserted into the negative pressure regulating box 3. The upper end of the pressure regulating pipe 32 is connected to the atmosphere, and the lower end is inserted below the liquid surface of the negative pressure regulating box 3 to regulate the maximum negative pressure value in the system.

[0043] The drive mechanism 7 includes a servo motor 71 fixed below the chassis 1, a gear 72 located at the output end of the servo motor 71, and an outer gear ring 73 fixed on the outer periphery of the lower connecting ring 52. The gear 72 meshes with the outer gear ring 73 for transmission. In order to achieve intelligent control, a laser beam sensor 8 pointing to the internal liquid tank 6 is provided on the upper outer side of the C-shaped frame 53.

[0044] The specific work process is as follows: Initial drainage state: Before use, seal and insert multiple empty effusion tanks 6 into all the C-shaped frames 53, and position the first effusion tank 6 in the working position. At this time, align the drainage tube 23 with the second through hole 56 of this position, align the water seal tube 22 with the first through hole 55, and simultaneously align the third through hole 57 on the retaining ring 54 with the fourth through hole 44 on the ring groove 42. The patient's pleural effusion and gas enter the effusion tank 6 through the drainage tube 23 and the second through hole 56. The liquid remains in the effusion tank 6, and the gas enters the water seal tube 22 through the first through hole 55. The liquid then enters the water seal tank 2, and then through the connecting pipe 21 into the negative pressure regulating tank 3. The central negative pressure source evacuates the negative pressure regulating tank 3 through the second negative pressure source pipe 43, the outer fourth through hole 44, the third through hole 57, the inner fourth through hole 44, and the first negative pressure source pipe 31. The pressure regulating pipe 32 balances the negative pressure according to the depth of insertion into the liquid surface. As the drainage proceeds, if the liquid level in the currently working liquid accumulation tank 6 rises to the preset threshold, the liquid blocks the optical path signal of the laser beam sensor 8, and the laser beam sensor 8 feeds back the signal to the control system.

[0045] Automatic switching and sealing pressure maintenance process: After receiving the signal, the control system controls the servo motor 71 to drive the autonomous changing mechanism 5 to rotate one station angle. During the rotation of the upper connecting ring 51, the originally connected pipeline is misaligned: the solid part of the upper connecting ring 51 blocks the lower port of the drainage tube 23, so that the air pressure from the drainage tube 23 to the patient's pleural cavity is maintained within a constant range, preventing backflow of external air and causing pneumothorax. The solid part of the upper connecting ring 51 blocks the lower port of the water seal tube 22, maintaining the airtightness of the water seal box 2. The solid part of the retaining ring 54 blocks the fourth through hole 44 on the ring groove 42, cutting off the connection between the first negative pressure source pipe 31 and the second negative pressure source pipe 43. At this time, although the central negative pressure source has not stopped, the air pressure inside the negative pressure regulating box 3 and the water seal box 2 is maintained within the previously stable range. Since the negative pressure no longer continuously draws, the part of the pressure regulating pipe 32 that extends into the liquid surface is still air and the bottom end is sealed by the liquid surface. However, no more air bubbles enter the liquid surface from the pressure regulating pipe 32, thus maintaining a constant air pressure state inside the system.

[0046] New workstation connection and continuous drainage: When the autonomous replacement mechanism 5 rotates to the next empty effusion tank 6, a new set of first through holes 55, second through holes 56 and third through holes 57 are instantly aligned and connected with the water seal pipe 22, drainage pipe 23 and fourth through hole 44 respectively. The servo motor 71 stops rotating. Since the system maintains the original negative pressure state during the switching process, once the pipeline is reconnected, the central negative pressure source instantly resumes suction through the second negative pressure source pipe 43. The drainage system does not need to go through the process of re-establishing negative pressure balance (i.e., it does not need to adjust the pressure regulating pipe 32 and wait for the liquid level to stabilize), thus achieving seamless, continuous and stable negative pressure drainage. Medical staff can replace the effusion tank 6 uniformly in the middle of the drainage or after all effusion tanks 6 are full. When replacing, simply pry open the clip 62 to remove the obstruction, take out the full effusion tank 6 through the handle 61, and insert the new effusion tank 6.

[0047] 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.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A portable chest drainage device, comprising a chassis (1), characterized in that: It also includes a water seal box (2) and a negative pressure regulating box (3) on the chassis (1), a cylindrical cover (4) on the chassis (1) that surrounds the water seal box (2) and the negative pressure regulating box (3), an autonomous replacement mechanism (5) that is rotatably located on the outside of the cylindrical cover (4), and a drive mechanism (7) for driving the autonomous replacement mechanism (5) to rotate. The self-replacing mechanism (5) includes an upper connecting ring (51) coaxially sleeved on the upper end of the cylindrical cover (4), a lower connecting ring (52) coaxially sleeved on the lower end of the cylindrical cover (4), and a plurality of i-shaped frames (53) evenly distributed in an annular arrangement between the upper connecting ring (51) and the lower connecting ring (52). A liquid collection tank (6) is sealed and inserted inside the i-shaped frame (53), and a laser beam sensor (8) pointing to the internal liquid collection tank (6) is provided on the upper outer side of the i-shaped frame (53). An mounting ring (41) is coaxially fixed on the outer side of the upper end of the sleeve (4). The upper surface of the upper connecting ring (51) is sealed and rotatedly fitted with the lower surface of the mounting ring (41). The lower surface of the lower connecting ring (52) is rotatedly fitted with the upper surface of the chassis (1).

2. The portable chest drainage device according to claim 1, characterized in that: The open side of the shaped frame (53) is positioned away from the axis of the cylindrical cover (4). The upper end of the liquid collection tank (6) is open and has a sealing layer. The upper end face of the liquid collection tank (6) is sealed and tightly attached to the lower surface of the upper connecting ring (51). The lower end face of the liquid collection tank (6) is tightly attached to the upper surface of the lower connecting ring (52). The upper connecting ring (51) has multiple sets of first through holes (55) and second through holes (56) arranged in a circumferential array along the axis of the upper connecting ring (51). The first through holes (55) and second through holes (56) of each set are located at the center of the cross section of the corresponding shaped frame (53).

3. A portable chest drainage device according to claim 2, characterized in that: The water seal box (2) is provided with a water seal tube (22), and the mounting ring (41) is provided with a drainage tube (23) for connecting to the patient's chest cavity. One end of the water seal tube (22) and one end of the drainage tube (23) both extend downward to the lower surface of the mounting ring (41). The second through hole (56) is located outside the first through hole (55) in the radial direction of the upper connecting ring (51). During the entire rotation process, the water seal tube (22) and the drainage tube (23) can be aligned and connected with the first through hole (55) and the second through hole (56) of each group at the same time.

4. A portable chest drainage device according to claim 3, characterized in that: The mounting ring (41) has an annular groove (42) with the slot facing downward on its outer periphery. The upper connecting ring (51) has a retaining ring (54) extending upward on its outer periphery. The retaining ring (54) is inserted into the annular groove (42) in a sealed and rotatable manner. The retaining ring (54) has multiple third through holes (57) arranged in a circular array on its radial side. The number of the third through holes (57) is the same as the number of the first through holes (55) and the second through holes (56). The annular groove (42) has a fourth through hole (44) that penetrates its two groove walls on its radial side.

5. A portable chest drainage device according to claim 4, characterized in that: The negative pressure regulating box (3) is provided with a first negative pressure source pipe (31), which is connected to the fourth through hole (44) on the inner side wall of the ring groove (42). The ring groove (42) is provided with a second negative pressure source pipe (43) on the outer side. One end of the second negative pressure source pipe (43) is connected to the fourth through hole (44) on the outer side wall of the ring groove (42), and the other end is used to connect to the central negative pressure source. When the upper ring (51) rotates so that the first through hole (55) and the second through hole (56) are connected to the water seal pipe (22) and the drainage pipe (23) respectively, the corresponding third through hole (57) is connected to the fourth through hole (44) at the same time.

6. A portable chest drainage device according to claim 5, characterized in that: The drive mechanism (7) includes a servo motor (71) fixed below the chassis (1), a gear (72) located at the output end of the servo motor (71), and an outer gear ring (73) fixed on the outer periphery of the lower connecting ring (52). The gear (72) meshes with the outer gear ring (73) for transmission.

7. A portable chest drainage device according to claim 6, characterized in that: The outer surface of the liquid collection tank (6) is provided with a handle (61), and one end of the guilloché frame (53) is provided with a locking strip (62) to prevent the liquid collection tank (6) from falling out. Both the guilloché frame (53) and the liquid collection tank (6) are made of transparent material.

8. A portable chest drainage device according to claim 7, characterized in that: The water seal tank (2) and the negative pressure regulating tank (3) are connected by a connecting pipe (21). A pressure regulating pipe (32) is inserted inside the negative pressure regulating tank (3). The upper end of the pressure regulating pipe (32) is connected to the atmosphere, and the lower end is inserted below the liquid surface of the negative pressure regulating tank (3).

9. A portable chest drainage device according to claim 8, characterized in that: When the laser beam sensor (8) detects that the liquid in the liquid tank (6) is blocking the optical path signal, the servo motor (71) is controlled to drive the autonomous replacement mechanism (5) to rotate one station angle, so that the current first through hole (55), second through hole (56) and third through hole (57) are misaligned and disconnected from the pipeline formed by the water seal pipe (22), the drainage pipe (23) and the fourth through hole (44) respectively, until the pipeline formed by the next station is connected and stops.

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