Negative pressure adsorption debridement device

Abstract

The invention relates to the technical field of medical instruments, in particular to a negative pressure adsorption debridement device which comprises an adsorption tank, a dirt storage tank, a negative pressure pipe, a liquid inlet pipe, a debridement handle, a liquid level-negative pressure control mechanism and a flow guide mechanism, the dirt storage tank is coaxially fixed to the bottom of the adsorption tank, and the negative pressure pipe and the liquid inlet pipe are oppositely fixed to the edge of the top of the adsorption tank. The top end of the liquid inlet pipe is connected with a debridement handle through a hose; the top end of the negative pressure pipe is connected with external negative pressure equipment through a hose; the liquid level-negative pressure control mechanism is arranged in the adsorption tank, and the flow guide mechanism is arranged between the adsorption tank and the sewage storage tank. By utilizing the liquid level-negative pressure control mechanism, liquid level control in the adsorption tank and negative pressure value adjustment of the negative pressure pipe are combined, and compared with an existing mechanical liquid level control device with a single cut-off function, liquid level-negative pressure dynamic linkage can be realized, pressure abnormity in the sewage storage tank caused by continuous operation of a negative pressure system is avoided, and the safety of the sewage storage tank is improved. A stable negative-pressure environment of the wound surface is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a negative pressure adsorption debridement device. BACKGROUND

[0002] As one of the core means of surgical wound treatment, the negative pressure adsorption debridement technology can efficiently guide the pollutants such as wound exudate and necrotic tissue fragments into a special waste storage tank through the suction force generated by the negative pressure system, so as to realize the cleaning and infection prevention of the wound. The technology has been widely used in clinical scenarios such as burns, chronic ulcers and postoperative infections. In the technology system, the liquid level control of the waste storage tank directly determines the safety and continuity of the debridement process. If the waste liquid level in the waste storage tank is too high and is not handled in time, the waste liquid is easy to flow back to the negative pressure host or the wound, resulting in equipment failure, secondary infection of the wound, and even endangering the life of the patient. Therefore, the liquid level control mechanism is an indispensable core component of the negative pressure adsorption debridement device.

[0003] At present, in order to realize real-time monitoring of the liquid level, most of the existing devices are provided with electronic liquid level sensors inside the waste storage tank. The electronic liquid level sensors can feed back the liquid level height through electrical signals and trigger an alarm or a cutoff action. However, in the clinical operating room environment, there are strong electromagnetic radiation sources such as high-frequency electrotomes, monitors and magnetic resonance devices. The signal transmission of the electronic liquid level sensor is easy to be disturbed, which leads to a decrease in the liquid level detection accuracy and makes it impossible to accurately reflect the actual liquid level state of the waste storage tank. Moreover, the electronic sensor relies on the power supply system and the signal processing module. If there are problems such as circuit failure, component aging or poor contact, the liquid level monitoring and control function will be directly lost. At this time, if the negative pressure system continues to run, the waste liquid in the waste storage tank will continue to accumulate until it overflows and flows back, which brings serious safety hazards to the clinical operation.

[0004] In order to avoid the reliability problems of electronic components, some devices try to use mechanical liquid level control devices to realize liquid level control through the waste liquid buoyancy driving mechanical structure. Such devices can only realize a single function of "cutoff when the liquid level reaches the set threshold". When the liquid level rises to the set threshold, the mechanical structure triggers the valve to close to prevent the waste liquid from continuing to enter. However, the mechanical structure cannot dynamically adjust the suction strength of the negative pressure system according to the change of the liquid level. After the cutoff action occurs, if the negative pressure system still maintains the original negative pressure value, it is easy to cause the formation of local high pressure or sudden change of negative pressure in the waste storage tank, which may damage the sealing structure of the waste storage tank on the one hand and interrupt the stable negative pressure environment of the wound on the other hand, thereby affecting the debridement effect. If the negative pressure is manually adjusted, the medical staff need to operate in real time, which increases the labor cost and is difficult to ensure the timeliness of the response. SUMMARY

[0005] In order to solve the problems that the electronic liquid level sensor is easy to be interfered by electromagnetic interference and the waste liquid is easy to flow back when the sensor fails in the liquid level control technology of the waste storage tank of the negative pressure adsorption debridement device, and the mechanical liquid level control device is single in function and cannot be dynamically linked with the negative pressure system, the application provides a negative pressure adsorption debridement device.

[0006] The application provides a negative pressure adsorption debridement device. The application provides a negative pressure adsorption debridement device. The bottom of the adsorption tank is coaxially fixed with a waste storage tank, the top edge of the adsorption tank is oppositely fixed with a negative pressure pipe and a liquid inlet pipe respectively, the top end of the liquid inlet pipe is connected with a debridement handle through a hose, and the top end of the negative pressure pipe is connected with an external negative pressure equipment through a hose. A liquid level-negative pressure control mechanism is arranged in the adsorption tank and used for controlling the liquid level in the adsorption tank and the negative pressure value of the negative pressure pipe, and the liquid level-negative pressure control mechanism comprises a supporting seat, a first transmission rod, a sealing disc, a second transmission rod, a driving gear, a driven gear and a liquid level linkage assembly. The supporting seat is fixed on one side of the outer wall of the supporting seat and located in the internal cavity of the adsorption tank, the first transmission rod and the second transmission rod are rotationally connected in the supporting seat, one end of the first transmission rod penetrates through the negative pressure pipe and is rotationally connected with the negative pressure pipe, the sealing disc is fixed on one end of the first transmission rod and located in the negative pressure pipe, the driving gear is coaxially fixed on the second transmission rod, the driven gear is coaxially fixed on the first transmission rod, and the driving gear and the driven gear are meshed with each other. The liquid level linkage assembly is arranged in the adsorption tank and partially connected with the second transmission rod. A flow guide mechanism is arranged between the adsorption tank and the waste storage tank and used for guiding the liquid in the adsorption tank into the waste storage tank, and the flow guide mechanism comprises a flow limiting cylinder, a flow guide pipe and a mounting hole, the flow limiting cylinder is vertically fixed between the adsorption tank and the waste storage tank, the mounting hole is radially arranged on the flow limiting cylinder, one end of the flow guide pipe is fixed in the mounting hole, and the other end of the flow guide pipe is connected with the bottom of the adsorption tank and communicates with the inside of the adsorption tank.

[0007] By adopting the technical scheme, the liquid level inside the adsorption tank is controlled in combination with the negative pressure value adjustment of the negative pressure pipe by using the liquid level-negative pressure control mechanism. Compared with the single cutting function of the existing mechanical liquid level control device, the liquid level-negative pressure dynamic linkage can be realized, the abnormal pressure in the pollution storage tank caused by the continuous operation of the negative pressure system can be avoided, the stable negative pressure environment of the wound can be ensured, the debridement effect can be improved, the bearing seat, the transmission rod, the gear and other pure mechanical structures in the liquid level-negative pressure control mechanism do not need to rely on electronic components, the risk of waste liquid backflow caused by electromagnetic interference of the electronic liquid level sensor and circuit failure is avoided, the reliability and stability of the device in complex clinical environment are improved, and by arranging the flow limiting cylinder and the flow guide pipe in the flow guide mechanism, the liquid in the adsorption tank can be orderly guided into the pollution storage tank, the smoothness of the waste liquid transmission path is ensured, and the disorderly flow of the liquid affecting the operation of the device is avoided.

[0008] Optionally, the liquid level linkage assembly comprises a telescopic rod, a support rod and a sliding disc, the support rod is vertically fixed in the adsorption tank, the sliding disc is coaxially and slidingly connected to the support rod, one end of the telescopic rod is rotationally connected to the edge of the sliding disc, and the other end of the telescopic rod is fixed to the second transmission rod.

[0009] By adopting the technical scheme, the linear sliding of the sliding disc along the support rod can accurately feedback the liquid level height, the second transmission rod is driven to rotate by the telescopic rod, the main gear is then driven to rotate, the main gear drives the driven gear to mesh and link, the sealing disc is deflected in the negative pressure pipe by the first transmission rod, the adjustment of the negative pressure value is realized, there is no signal delay in the transmission process, and the response speed is better than that of the electronic sensor.

[0010] Optionally, the liquid level linkage assembly further comprises a base, a linkage rod, an adjusting rod and a floating ball, the base is fixed to the bottom of the support rod, one end of the linkage rod is rotationally connected to the base, the floating ball is fixed to the other end of the linkage rod, one end of the adjusting rod is rotationally connected to the edge of the sliding disc, and the other end of the adjusting rod is rotationally connected to the linkage rod.

[0011] By adopting the technical scheme, the floating ball is driven to rise and fall with the liquid level, the sliding disc is driven by the linkage rod and the adjusting rod, the closed-loop control of “liquid level change-mechanical transmission-negative pressure adjustment” is formed, compared with the single cutting function of the traditional mechanical device, the negative pressure value can be dynamically adjusted in real time according to the liquid level, the transmission ratio of the mechanical lever structure is stable, is not affected by the environment temperature and humidity, and the reliability is significantly improved.

[0012] Optionally, a first reset member is arranged on the outside of the support rod, one end of the first reset member abuts against the sliding disc, and the other end of the first reset member abuts against the top of the adsorption tank.

[0013] By adopting the technical scheme, the first reset member is used to push the sliding disc to reset downward, so that the negative pressure system can be restored to the suction force in time as the liquid level decreases, and manual adjustment is avoided; and the hysteresis of mechanical transmission is eliminated, and the cycle stability of the liquid level-negative pressure linkage is ensured.

[0014] Optionally, the flow guide mechanism further comprises a first sealing column, a pull rod and a second sealing column, the first sealing column and the second sealing column are both sealingly connected in the internal cavity of the flow limiting barrel, the first sealing column is located above the second sealing column, the pull rod is slidingly connected at the top center of the flow limiting barrel, one end of the pull rod is fixed with the first sealing column, and the other end is fixed with the sliding disc.

[0015] By adopting the technical scheme, the sliding disc drives the first sealing column and the second sealing column to move up and down through the pull rod, so as to block the mounting hole, and when the waste liquid in the adsorption tank reaches a certain value, the first sealing column and the second sealing column are separated, so that the waste liquid in the adsorption tank can flow into the pollution storage tank.

[0016] Optionally, the flow guide mechanism further comprises a clamping jaw and a clamping block, the clamping jaw is rotatably connected in the first sealing column, and the clamping jaw is symmetrically provided with two clamping jaws, and the clamping block is fixed at the top center of the second sealing column and located between the two adjacent clamping jaws.

[0017] By adopting the technical scheme, the clamping jaw clamps the clamping block, so that the first sealing column and the second sealing column can move synchronously, and the blocking effect of the mounting hole is realized.

[0018] Optionally, the top of the internal cavity of the flow limiting barrel is provided with an unlocking groove, the unlocking groove is a tapered structure, the upper half of the clamping jaw is an arc structure, and the arc structure is slidingly abutted in the unlocking groove.

[0019] By adopting the technical scheme, the arc structure of the upper half of the clamping jaw is slidingly abutted with the unlocking groove, and the tapered slope is automatically triggered to unlock, so that the first sealing column and the second sealing column are separated, and the waste liquid in the adsorption tank can flow into the pollution storage tank, and the liquid level is ensured to drop.

[0020] Optionally, the first sealing column is further provided with a second reset member, and the second reset member is connected between the two adjacent clamping jaws.

[0021] By adopting the technical scheme, the second reset member is used to pull the clamping jaw to reset, so as to prevent the function failure caused by the retention of the clamping jaw due to external force, and ensure that the clamping jaw and the clamping block interlocking mechanism can accurately act each time the liquid level fluctuates.

[0022] Optionally, the overall structure composed of the linkage rod, the adjusting rod and the floating ball is at least symmetrically provided with two groups.

[0023] By adopting the technical scheme, the symmetrical structure is used to make the system bear force evenly at different liquid level heights, is suitable for stable control of large-capacity pollution storage tanks, eliminates torque deviation of unilateral transmission, avoids tilting and jamming of the sliding disc, and improves sensitivity and consistency of liquid level monitoring.

[0024] Optionally, the driving gear and the driven gear are both helical tooth structures, and the diameter of the driving gear is greater than that of the driven gear.

[0025] By adopting the technical scheme, the helical tooth engagement is used to make transmission more stable, reduce mechanical noise, reduce transmission gap, improve precision of negative pressure adjustment, and the gear combination with different diameters forms a speed increasing structure, so that a small change in liquid level can trigger rapid response of the negative pressure system, which is better than the lagging adjustment of the traditional mechanical device.

[0026] In summary, the present application has at least one of the following beneficial technical effects: The liquid level-negative pressure control mechanism combines liquid level control in the adsorption tank with negative pressure value adjustment of the negative pressure pipe, can realize liquid level-negative pressure dynamic linkage compared with the single cutting function of the existing mechanical liquid level control device, avoids abnormal pressure in the pollution storage tank caused by continuous operation of the negative pressure system, guarantees a stable negative pressure environment of a wound, improves debridement effect, the bearing seat, transmission rod, gear and other pure mechanical structures in the liquid level-negative pressure control mechanism do not need to rely on electronic components, avoid the risk of waste liquid backflow caused by circuit failure due to electromagnetic interference of the electronic liquid level sensor, improve the reliability and stability of the device in complex clinical environment, and the flow limiting cylinder and the flow guide pipe in the flow guide mechanism can orderly guide the liquid in the adsorption tank into the pollution storage tank, ensure smoothness of the waste liquid transmission path, and avoid disorderly liquid flow affecting device operation. The floating ball is driven by the linkage rod and the adjusting rod to drive the sliding disc as the liquid level rises and falls, forming a closed loop control of "liquid level change-mechanical transmission-negative pressure adjustment", which can dynamically adjust the negative pressure value in real time according to the liquid level compared with the single cutting function of the traditional mechanical device, and the mechanical lever structure transmission ratio is stable and is not affected by environmental temperature and humidity, so that the reliability is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of a negative pressure adsorption debridement device in the embodiment.

[0028] Figure 2 is a schematic diagram of the cross-sectional structure of the adsorption tank and the pollution storage tank in the embodiment.

[0029] Figure 3 is a schematic diagram of the liquid level-negative pressure control mechanism structure in the embodiment.

[0030] Figure 4 is a schematic view of the telescopic rod and the connecting structure thereof in the embodiment.

[0031] Figure 5 is a schematic view of the external connecting structure of the flow-limiting cylinder in the embodiment.

[0032] Figure 6 is a schematic view of the flow guide mechanism structure in the embodiment.

[0033] Legend: 1, adsorption tank; 2, pollution storage tank; 3, negative pressure pipe; 4, liquid inlet pipe; 5, debridement handle; 6, liquid level-negative pressure control mechanism; 61, supporting seat; 62, first transmission rod; 63, sealing disc; 64, second transmission rod; 65, driving gear; 66, driven gear; 67, telescopic rod; 68, supporting rod; 69, sliding disc; 610, base; 611, linkage rod; 612, adjusting rod; 613, floating ball; 614, first reset member; 7, flow guide mechanism; 71, flow-limiting cylinder; 72, flow guide pipe; 73, mounting hole; 74, first sealing column; 75, pull rod; 76, second sealing column; 77, clamping jaw; 78, clamping block; 79, unlocking groove; 710, second reset member. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings. Figures 1-6 The application will be further described in detail.

[0035] The embodiment of the application discloses a negative pressure adsorption debridement device.

[0036] It should be noted that in the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0037] Reference Figure 1 and Figure 2The application discloses a negative pressure adsorption debridement device, which comprises an adsorption tank 1, a waste storage tank 2, a negative pressure pipe 3, a liquid inlet pipe 4, a debridement handle 5, a liquid level-negative pressure control mechanism 6 and a flow guide mechanism 7, the bottom of the adsorption tank 1 is coaxially fixed with the waste storage tank 2, the top edge of the adsorption tank 1 is oppositely fixed with the negative pressure pipe 3 and the liquid inlet pipe 4 respectively, the top end of the liquid inlet pipe 4 is connected with the debridement handle 5 through a hose, and the top end of the negative pressure pipe 3 is connected with external negative pressure equipment through a hose; the liquid level-negative pressure control mechanism 6 is arranged in the adsorption tank 1 and comprises a supporting seat 61, a first transmission rod 62, a sealing disc 63, a second transmission rod 64, a driving gear 65, a driven gear 66 and a liquid level linkage assembly; the flow guide mechanism 7 is arranged between the adsorption tank 1 and the waste storage tank 2 and comprises a flow limiting cylinder 71, a flow guide pipe 72 and a mounting hole 73; the liquid level in the adsorption tank 1 is controlled in combination with the negative pressure value adjustment of the negative pressure pipe 3 by the liquid level-negative pressure control mechanism 6, compared with the single cutting function of the existing mechanical liquid level control device, the liquid level-negative pressure dynamic linkage can be realized, the abnormal pressure in the waste storage tank caused by the continuous operation of the negative pressure system is avoided, the stable negative pressure environment of a wound surface is ensured, the debridement effect is improved, meanwhile, the supporting seat 61, the transmission rod, the gear and other pure mechanical structures in the liquid level-negative pressure control mechanism 6 do not need to rely on electronic elements, the risk that the electronic liquid level sensor is easily interfered by electromagnetic waves and the waste liquid is backflowed due to circuit failure is avoided, the reliability and stability of the device in a complex clinical environment are improved, and the liquid in the adsorption tank 1 can be orderly introduced into the waste storage tank 2 through the arrangement of the flow limiting cylinder 71 and the flow guide pipe 72 in the flow guide mechanism 7, the smoothness of a waste liquid transmission path is ensured, and the disorderly flow of liquid affecting the operation of the device is avoided.

[0038] Specifically, the supporting seat 61 is fixed on one side of the outer wall of the supporting seat 61 and located in the internal cavity of the adsorption tank 1, the first transmission rod 62 and the second transmission rod 64 are rotationally connected in the supporting seat 61, one end of the first transmission rod 62 penetrates through the negative pressure pipe 3 and is rotationally connected with the negative pressure pipe 3, the sealing disc 63 is fixed on one end of the first transmission rod 62 and located in the negative pressure pipe 3, the driving gear 65 is coaxially fixed on the second transmission rod 64, the driven gear 66 is coaxially fixed on the first transmission rod 62, and the driving gear 65 and the driven gear 66 are meshed with each other; the liquid level linkage assembly is arranged in the adsorption tank 1 and partially connected with the second transmission rod 64. The flow limiting cylinder 71 is vertically fixed between the adsorption tank 1 and the waste storage tank 2, the mounting hole 73 is radially arranged on the flow limiting cylinder 71, one end of the flow guide pipe 72 is fixed in the mounting hole 73, and the other end is connected to the bottom of the adsorption tank 1 and communicates with the inside of the adsorption tank 1.

[0039] Reference Figure 3 and Figure 4In this embodiment of the invention, the liquid level linkage component includes a telescopic rod 67, a support rod 68, a sliding plate 69, a base 610, a linkage rod 611, an adjusting rod 612, and a float 613. The sliding plate 69, by sliding linearly along the support rod 68, can accurately reflect the liquid level height. The telescopic rod 67 drives the second transmission rod 64 to rotate, which in turn drives the active gear 65 to rotate. The active gear 65 then drives the driven gear 66 to mesh and engage. Combined with the first transmission rod 62, this causes the sealing plate 63 to deflect within the negative pressure pipe 3, thus adjusting the negative pressure value. The transmission process has no signal delay, and the response speed is superior to electronic sensors. The float 613, rising and falling with the liquid level, drives the sliding plate 69 through the linkage rod 611 and the adjusting rod 612, forming a closed-loop control of "liquid level change - mechanical transmission - negative pressure adjustment." Compared to the single cutoff function of traditional mechanical devices, this component can dynamically adjust the negative pressure value in real time according to the liquid level. Furthermore, the mechanical lever structure has a stable transmission ratio, is unaffected by ambient temperature and humidity, and significantly improves reliability.

[0040] In this embodiment of the invention, the support rod 68 is vertically fixed inside the adsorption tank 1, the sliding disk 69 is coaxially slidably connected to the support rod 68, one end of the telescopic rod 67 is rotatably connected to the edge of the sliding disk 69, and the other end is fixed to the second transmission rod 64, the base 610 is fixed to the bottom of the support rod 68, one end of the linkage rod 611 is rotatably connected to the base 610, the float 613 is fixed to the other end of the linkage rod 611, one end of the adjusting rod 612 is rotatably connected to the edge of the sliding disk 69, and the other end is rotatably connected to the linkage rod 611.

[0041] Specifically, a first reset member 614 is sleeved on the outside of the support rod 68. One end of the first reset member 614 abuts against the sliding plate 69, and the other end abuts against the top of the adsorption tank 1. The first reset member 614 is used to push the sliding plate 69 down to reset, ensuring that the negative pressure system can restore suction in time as the liquid level decreases, avoiding manual adjustment; eliminating the lag of mechanical transmission, and ensuring the stability of the liquid level-negative pressure linkage cycle.

[0042] Reference Figure 5 and Figure 6Specifically, in this embodiment of the invention, the flow guiding mechanism 7 further includes a first sealing column 74, a pull rod 75, a second sealing column 76, a gripper 77, a locking block 78, and an unlocking groove 79. The sliding disc 69, via the pull rod 75, drives the first sealing column 74 and the second sealing column 76 to move up and down, thus sealing the mounting hole 73. When the waste liquid inside the adsorption tank 1 reaches a certain level, the first sealing column 74 and the second sealing column 76 separate, allowing the waste liquid inside the adsorption tank 1 to flow into the storage tank 2. The gripper 77 engages the locking block 78, allowing the first sealing column 74 and the second sealing column 76 to move synchronously, thus sealing the mounting hole 73. Simultaneously, the arc-shaped structure of the upper part of the gripper 77 slides against the unlocking groove 79, automatically triggering unlocking via a conical inclined surface, separating the first sealing column 74 and the second sealing column 76, allowing the waste liquid inside the adsorption tank 1 to flow into the storage tank 2, ensuring a drop in liquid level.

[0043] The first sealing post 74 and the second sealing post 76 are both slidably connected in the internal cavity of the flow-limiting cylinder 71. The first sealing post 74 is located above the second sealing post 76. The pull rod 75 is slidably connected at the top center of the flow-limiting cylinder 71, with one end of the pull rod 75 fixed to the first sealing post 74 and the other end fixed to the sliding plate 69. The gripper 77 is rotatably connected inside the first sealing post 74, and two grippers 77 are symmetrically arranged. The locking block 78 is fixed at the top axis of the second sealing post 76 and is located between two adjacent grippers 77. The top of the internal cavity of the flow-limiting cylinder 71 is provided with an unlocking groove 79, which has a conical structure. The upper half of the gripper 77 has an arc-shaped structure, and the arc-shaped structure slides against the unlocking groove 79.

[0044] In this embodiment of the invention, a second reset member 710 is also provided inside the first sealing column 74. The second reset member 710 is connected between two adjacent grippers 77. The second reset member 710 is used to pull the grippers 77 to reset, preventing the grippers 77 from failing due to external force retention, and ensuring that the interlocking mechanism of the grippers 77 and the locking block 78 can operate accurately every time the liquid level fluctuates.

[0045] The overall structure consisting of linkage rod 611, adjusting rod 612 and float ball 613 is arranged in at least two sets in a symmetrical manner. The symmetrical structure makes the system uniformly stressed at different liquid levels, which is suitable for the stable control of large-capacity sludge storage tanks, eliminates torque deviation of unilateral transmission, avoids tilting and jamming of sliding plate 69, and improves the sensitivity and consistency of liquid level monitoring.

[0046] Specifically, both the driving gear 65 and the driven gear 66 are helical gears, and the diameter of the driving gear 65 is larger than that of the driven gear 66. The helical gear meshing makes the transmission smoother, reduces mechanical noise, and reduces transmission clearance, thereby improving the accuracy of negative pressure regulation. At the same time, the combination of gears with different diameters forms a speed-increasing structure, which allows the negative pressure system to respond quickly to even small changes in liquid level, which is superior to the lag regulation of traditional mechanical devices.

[0047] The implementation principle of a negative pressure adsorption wound cleaning device according to an embodiment of the present invention is as follows: First, the top end of the negative pressure pipe 3 is connected to an external negative pressure device through a hose, and the top end of the liquid inlet pipe 4 is connected to the wound cleaning handle 5 through a hose. At this time, there is no liquid in the adsorption tank 1 and the sludge storage tank 2. The sliding plate 69 in the liquid level-negative pressure control mechanism 6 is located in the initial position under the action of the first reset member 614. The first sealing column 74 and the second sealing column 76 in the flow guiding mechanism 7 are engaged with the clamping block 78 through the claw 77 to form an integral structure and seal the mounting hole 73. Then, the wound is cleaned using the debridement handle 5. Under the negative pressure generated by the external negative pressure device, the wound exudate, necrotic tissue fragments and other contaminants are sucked into the adsorption tank 1 through the liquid inlet pipe 4. As the liquid continuously enters the adsorption tank 1, the liquid level gradually rises. Under the action of buoyancy, the float 613 drives the linkage rod 611 to rotate around the base 610. The linkage rod 611 pushes the sliding plate 69 to slide upward along the support rod 68 through the adjusting rod 612. When the sliding plate 69 slides, it drives the second transmission rod 64 to rotate through the telescopic rod 67. The active gear 65 on the second transmission rod 64 rotates accordingly and meshes with the driven gear 66 to rotate, thereby causing the first transmission rod 62 to rotate, driving the sealing plate 63 to rotate in the negative pressure pipe 3, reducing the flow area of ​​the negative pressure pipe 3, reducing the negative pressure value, and realizing the dynamic linkage adjustment of liquid level and negative pressure. When the liquid level in the adsorption tank 1 reaches the danger threshold, the sliding plate 69 continues to move upward, and the first sealing column 74 is pulled upward by the pull rod 75 within the flow-limiting cylinder 71. The arc-shaped structure of the upper part of the gripper 77 in the first sealing column 74 slides along the unlocking groove 79. When the gripper 77 slides to a specific position, the gripper 77 opens and unlocks the second sealing column 76. At this time, the second sealing column 76 separates from the first sealing column 74 and resets under the action of gravity, so that the mounting hole 73 is located between the first sealing column 74 and the second sealing column 76, opening the passage so that the liquid in the adsorption tank 1 can flow into the sludge storage tank 2.

[0048] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A negative pressure adsorption wound cleaning device, characterized in that, include: An adsorption tank (1) is provided. A sludge storage tank (2) is coaxially fixed at the bottom of the adsorption tank (1). A negative pressure pipe (3) and an inlet pipe (4) are respectively fixed at the top edge of the adsorption tank (1). A wound cleaning handle (5) is connected to the top of the inlet pipe (4) through a hose. The top of the negative pressure pipe (3) is connected to an external negative pressure device through a hose. The liquid level-negative pressure control mechanism (6) is used to control the liquid level inside the adsorption tank (1) and the negative pressure value of the negative pressure pipe (3). The liquid level-negative pressure control mechanism (6) is installed inside the adsorption tank (1) and includes a support seat (61), a first transmission rod (62), a sealing plate (63), a second transmission rod (64), a driving gear (65), a driven gear (66), and a liquid level linkage assembly. The support (61) is fixed to one side of the outer wall of the support (61) and located in the internal cavity of the adsorption tank (1). The first transmission rod (62) and the second transmission rod (64) are rotatably connected to the support (61). One end of the first transmission rod (62) passes through the negative pressure pipe (3) and is rotatably connected to the negative pressure pipe (3). The sealing disc (63) is fixed to one end of the first transmission rod (62) and located inside the negative pressure pipe (3). The driving gear (65) is coaxially fixed on the second transmission rod (64). The driven gear (66) is coaxially fixed on the first transmission rod (62), and the driving gear (65) and the driven gear (66) mesh with each other. The liquid level linkage component is disposed inside the adsorption tank (1) and is partially connected to the second transmission rod (64); A flow guiding mechanism (7) is used to guide the liquid in the adsorption tank (1) into the sludge storage tank (2). The flow guiding mechanism (7) is disposed between the adsorption tank (1) and the sludge storage tank (2), and includes a flow limiting cylinder (71), a flow guiding pipe (72) and a mounting hole (73). The flow limiting cylinder (71) is vertically fixed between the adsorption tank (1) and the sludge storage tank (2). The mounting hole (73) is radially disposed on the flow limiting cylinder (71). One end of the flow guiding pipe (72) is fixed in the mounting hole (73), and the other end is connected to the bottom of the adsorption tank (1) and communicates with the interior of the adsorption tank (1).

2. The negative pressure adsorption wound cleaning device according to claim 1, characterized in that, The liquid level linkage assembly includes a telescopic rod (67), a support rod (68), and a sliding disk (69). The support rod (68) is vertically fixed inside the adsorption tank (1). The sliding disk (69) is slidably connected to the support rod (68) on the same axis. One end of the telescopic rod (67) is rotatably connected to the edge of the sliding disk (69), and the other end is fixed to the second transmission rod (64).

3. The negative pressure adsorption wound cleaning device according to claim 2, characterized in that, The liquid level linkage assembly also includes a base (610), a linkage rod (611), an adjusting rod (612), and a float (613). The base (610) is fixed to the bottom of the support rod (68). One end of the linkage rod (611) is rotatably connected to the base (610). The float (613) is fixed to the other end of the linkage rod (611). One end of the adjusting rod (612) is rotatably connected to the edge of the sliding plate (69), and the other end is rotatably connected to the linkage rod (611).

4. The negative pressure adsorption wound cleaning device according to claim 2, characterized in that, The support rod (68) is fitted with a first reset member (614), one end of which abuts against the sliding disk (69), and the other end abuts against the top of the adsorption tank (1).

5. The negative pressure adsorption wound cleaning device according to claim 2, characterized in that, The flow guiding mechanism (7) further includes a first sealing post (74), a pull rod (75), and a second sealing post (76). The first sealing post (74) and the second sealing post (76) are both slidably connected in the internal cavity of the flow limiting cylinder (71). The first sealing post (74) is located above the second sealing post (76). The pull rod (75) is slidably connected at the top center of the flow limiting cylinder (71). One end of the pull rod (75) is fixed to the first sealing post (74), and the other end is fixed to the sliding plate (69).

6. The negative pressure adsorption wound cleaning device according to claim 5, characterized in that, The flow guiding mechanism (7) further includes a gripper (77) and a locking block (78). The gripper (77) is rotatably connected inside the first sealing column (74), and there are two grippers (77) symmetrically arranged. The locking block (78) is fixed at the top axis of the second sealing column (76) and is located between two adjacent grippers (77).

7. The negative pressure adsorption wound cleaning device according to claim 6, characterized in that, The top of the cavity inside the flow-limiting cylinder (71) is provided with an unlocking groove (79). The unlocking groove (79) has a conical structure, and the upper half of the gripper (77) has an arc-shaped structure, which slides against the unlocking groove (79).

8. The negative pressure adsorption wound cleaning device according to claim 6, characterized in that, The first sealing column (74) is also provided with a second reset member (710), which is connected between two adjacent grippers (77).

9. A negative pressure adsorption wound cleaning device according to claim 3, characterized in that, The overall structure formed by the combination of the linkage rod (611), the adjusting rod (612), and the float (613) is arranged in at least two sets in a symmetrical manner.

10. The negative pressure adsorption wound cleaning device according to claim 1, characterized in that, Both the driving gear (65) and the driven gear (66) are helical gears, and the diameter of the driving gear (65) is larger than that of the driven gear (66).

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