Closed negative pressure drainage device and system convenient to wash

Abstract

The invention aims at providing a closed negative pressure drainage device and system convenient to wash, and relates to the technical field of medical instruments. A sealing cover is located in the center of a sealing gasket and is in closed connection with the sealing gasket, a suction ring is in closed connection with the lower portion of the sealing gasket, a filling block is detachably installed on the sealing cover, and a washing ring is embedded in the filling block; the sealing cover, the flushing ring and the suction ring are connected with the first pump, the second pump and the third pump respectively, the wound surface can be flushed through the flushing ring, water flow can be sucked through the suction ring, and therefore flushing and sewage suction are achieved. Through a normal mode, a flushing mode and a transition mode designed by the system, a constant negative pressure value can be kept during flushing to carry out closed negative pressure drainage, and residual water can be sucked out as much as possible through the transition mode; and the washing time point, the washing power and the washing duration can be regularly controlled through the controller.

Description

Technical Field

[0001] The present invention relates to the technical field related to medical devices, and in particular to a closed negative pressure drainage device and system that is easy to flush. Background Art

[0002] Vacuum seal drainage, or VSD, is an innovative medical technology. It utilizes polyurethane film and polyvinyl alcohol-hydrated seaweed salt foam as key materials. Through continuous negative pressure drainage, wound exudate is rapidly expelled through the micropores and drainage tubes within the VSD dressing. This technology not only significantly promotes wound healing but also alleviates the pain of repeated dressing changes associated with persistent wounds.

[0003] Vacuum seal drainage (VSD) technology, through the ingenious application of polyurethane film and polyvinyl alcohol-hydrated seaweed salt foam, combined with continuous negative pressure drainage, can effectively and rapidly drain wound exudate. This technology is significantly effective in alleviating patient pain and promoting wound healing.

[0004] During vacuum sealing drainage, optimal vacuum suction conditions must be adjusted to maintain a constant negative pressure environment. The edges of wounds in closed, negative pressure treatments are often difficult to flush. Accumulation of pus and secretions at the edges of infected wounds can make the infection difficult to control and even spread. Currently, flushing with saline is a common method, but this can easily disrupt the original negative pressure environment, preventing the effective vacuum suction pressure from being maintained, and thus compromising the effectiveness of vacuum sealing drainage. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides the following technical solutions:

[0006] A closed negative pressure drainage device that is easy to flush, includes a sealing cover, a sealing gasket, a filling block, a negative pressure tube and a flushing assembly, the flushing assembly includes pump A, pump B and pump C; the sealing cover is located in the center of the sealing gasket and is tightly connected to the sealing gasket; a suction ring is tightly connected below the sealing gasket, the filling block is detachably mounted on the sealing cover, a placement bin is provided in the filling block, and a flushing ring is provided in the placement bin; the sealing cover, flushing ring and suction ring are respectively connected to pump A, pump B and pump C, and the suction ring is connected to pump C via a fixed suction tube.

[0007] Furthermore, the sealing cover has a negative pressure chamber inside, and a number of fixing hooks are provided under the sealing cover, and the filling block is connected to the sealing cover through the fixing hooks; a number of negative pressure holes are also provided under the sealing cover, which are connected to the negative pressure chamber; the sealing cover is connected to Pump A through a fixed negative pressure tube, and the negative pressure tube is connected to the negative pressure chamber.

[0008] Furthermore, the flushing ring is a spiral disc structure fixedly installed on the bottom of the placement bin, the bottom of the flushing ring is an open structure, the flushing ring is detachably connected to a flushing pipe, the inner end of the flushing ring is connected to the flushing pipe, the bottom of the inner end is a closed structure, and the outer end of the flushing ring is connected to the suction pipe; the flushing ring is connected to pump B through the flushing pipe; the flushing pipe is connected in series with an electromagnetic three-way valve.

[0009] Furthermore, the flushing ring is a deformable structure, and the flushing ring includes a baffle, which is a deformable waterproof structure. The baffle can be deformed into a spiral structure, a circular structure, a snake-shaped structure, and a rectangular structure. The bottom of the baffle is embedded in the bottom of the placement bin, and a cover is provided on the top of the placement bin. The cover is covered above the baffle, and a flushing pipe is detachably connected to the cover; the placement bin is connected to pump B through the flushing pipe; an electromagnetic three-way valve is connected in series on the flushing pipe.

[0010] Furthermore, the attraction ring is located on the periphery of the sealing cover, a suction chamber is provided inside the attraction ring, and the suction tube is connected to the suction chamber; a suction hole is provided on the inner side of the attraction ring and is connected to the suction chamber.

[0011] Furthermore, an adhesive layer is fixedly provided on the periphery of the sealing gasket.

[0012] Furthermore, the flushing assembly also includes a collection box and a flushing box. The pumps A and C are connected to the collection box, and the pump B is connected to the flushing box.

[0013] A closed negative pressure drainage system for easy flushing, comprising a sensor mounted on a negative pressure tube and a controller mounted on a flushing assembly, wherein the controller is used to control different operating modes of the system, including a normal mode, a flushing mode, and a transition mode; and the sensor is used to detect negative pressure values ​​in different operating modes.

[0014] When the flushing time is reached, the controller switches the working mode to the flushing mode; after the flushing time is over, the controller switches the working mode to the transition mode to further absorb the residual liquid in the filling block; after the transition mode time is over, the controller switches the working mode to the normal mode.

[0015] Furthermore, the sensor is used to detect the negative pressure value of the closed negative pressure environment, and the controller includes a control module, a timing module, a delay module, a display module, and an input module;

[0016] The input module is used to input the constant negative pressure value of negative pressure suction in normal mode, the flushing time point and flushing duration in flushing mode, the flushing power, and the duration of transition mode;

[0017] The timing module is used to count time by year, month, day, hour, minute and second;

[0018] The delay module is used to control the end time of transition mode and flushing mode;

[0019] The display module is used to display the data of the timing module, the working mode status and the working time of the working mode;

[0020] The control module is used to receive the data from the sensor and compare it with the input constant negative pressure value, and control the operation of the electromagnetic three-way valve, pump A, pump B, and pump C based on the comparison result.

[0021] Furthermore, in the normal mode, the controller controls the opening and closing of the electromagnetic three-way valve and the operation and stopping of Pump A according to the negative pressure value detected by the sensor; if the detected negative pressure value detected by the sensor reaches a constant negative pressure value, the controller controls the electromagnetic three-way valve to be isolated from the outside world and Pump A to stop working; if the detected negative pressure value is lower than the constant negative pressure value, Pump A stops working, the electromagnetic three-way valve is connected to the outside world, and the internal pressure is increased until the detected negative pressure value reaches the constant negative pressure value, and the controller controls the electromagnetic three-way valve to be isolated from the outside world and Pump A stops working; if the detected negative pressure value is higher than the constant negative pressure value, the electromagnetic three-way valve is controlled to be isolated from the outside world, Pump A starts working negative pressure suction, reducing the internal pressure until the detected negative pressure value reaches the constant negative pressure value, and the controller controls the electromagnetic three-way valve to be isolated from the outside world and Pump A stops working.

[0022] Furthermore, in the flushing mode, the controller controls Pump B to operate according to the input flushing power, and then the controller controls the power of Pump C according to the negative pressure value detected by the sensor; if the detected negative pressure value detected by the sensor reaches a constant negative pressure value, the controller controls Pump B and Pump C to maintain this power for flushing and suction; if the detected negative pressure value is higher than the constant negative pressure value, the suction power of Pump C is increased, and the internal pressure is reduced until the detected negative pressure value reaches the constant negative pressure value, and the controller controls Pump B and Pump C to maintain this power for flushing and suction; if the detected negative pressure value is lower than the constant negative pressure value, the power of Pump C is reduced, and the internal pressure is increased until the detected negative pressure value reaches the constant negative pressure value, and the controller controls Pump B and Pump C to maintain this power for flushing and suction.

[0023] Furthermore, in the transition mode, the controller controls pump B to stop working, and then controls the electromagnetic three-way valve to connect to the outside world; controls the power of pump C according to the negative pressure value detected by the sensor; if the detected negative pressure value detected by the sensor reaches a constant negative pressure value, the controller controls pump C to maintain this power for suction; if the detected negative pressure value is higher than the constant negative pressure value, the power of pump C to attract is increased, and the internal pressure is reduced until the detected negative pressure value reaches a constant negative pressure value, and the controller controls pump C to maintain this power for suction; if the detected negative pressure value is lower than the constant negative pressure value, the power of pump C is reduced, and the internal pressure is increased until the detected negative pressure value reaches a constant negative pressure value, and the controller controls pump C to maintain this power for suction; after the transition mode is completed, the controller controls the electromagnetic three-way valve to be isolated from the outside world, pump C stops working, and enters normal mode.

[0024] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0025] The sealing cover of the present invention is located in the center of the sealing gasket and is tightly connected to the sealing gasket. A suction ring is tightly connected to the bottom of the sealing gasket. The filling block is detachably mounted on the sealing cover. A flushing ring is embedded in the filling block. The sealing cover, the flushing ring and the suction ring are respectively connected to Pump A, Pump B and Pump C. The wound surface can be flushed through the flushing ring, and water can be attracted through the suction ring, thereby achieving flushing and attracting sewage. Through the normal mode, flushing mode and transition mode designed by the system, a constant negative pressure value can be maintained during flushing to perform closed negative pressure drainage, and the transition mode can be used to attract as much residual moisture as possible. The flushing time point, flushing power and flushing duration can be controlled regularly by the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic cross-sectional structural diagram of the device of the present invention;

[0027] Figure 2 This is an enlarged schematic diagram of the cross-sectional structure A of the device of the present invention;

[0028] Figure 3 This is an enlarged schematic diagram of the cross-sectional structure B of the device of the present invention;

[0029] Figure 4 Schematic diagram of the device structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure below the flushing ring of the spiral disc structure of the present invention;

[0031] Figure 6 Schematic diagram of system working mode switching of the present invention;

[0032] Figure 7 This is a logic diagram of the normal mode operation of the system of the present invention;

[0033] Figure 8 This is a logic diagram of the system flushing mode operation of the present invention;

[0034] Figure 9 A schematic diagram of the system transition mode operation logic of the present invention;

[0035] Figure 10 This is a schematic diagram of the installation of the deformable flushing ring of the present invention;

[0036] Figure 11 A schematic diagram of a spiral structure formed by a baffle according to the present invention;

[0037] Figure 12This is a schematic diagram of a rectangular structure formed by the baffles of the present invention;

[0038] Figure 13 This is a schematic diagram of a circular structure formed by the baffle of the present invention;

[0039] Figure 14 This is a schematic diagram of the baffle of the present invention forming a snake-shaped structure.

[0040] In the figure: sealing gasket-1, adhesive layer-2, suction ring-3, sealing cover-4, negative pressure hole-401, fixing hook-402, negative pressure tube-5, sensor-6, electromagnetic three-way valve-7, flushing tube-8, flushing ring-9, filling block-10, suction tube-11, collection box-12, flushing box-13, controller-14, pump A-15, pump B-16, pump C-17, cover plate-18. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] Example 1:

[0043] See also Figure 1-5 In this embodiment, the procedure for vacuum seal drainage (VSD) is as follows: First, thoroughly remove infected tissue from the wound surface to prepare for subsequent treatment. Depending on the size of the wound, trim the appropriate amount of VSD dressing and adhere it tightly to the wound surface, securing it with sutures. Next, gently clean the skin surrounding the wound with sterile gauze to ensure a clean treatment environment. Then, use a biopermeable membrane to seal the entire wound surface and the VSD dressing to ensure a good seal. After sealing, perform vacuum suction. Connect the silicone tube of the VSD dressing to the central vacuum suction device. Maintain a constant negative pressure environment by adjusting the optimal vacuum suction state, typically between -125 and -450 mmHg. When the VSD dressing and film show noticeable collapse, the seal is effective and the vacuum suction is performing satisfactorily. Finally, continue vacuum suction treatment for 7 to 14 days, closely monitoring the wound surface during this period. When a large amount of fresh granulation tissue appears on the wound surface, free skin grafting or flap transplantation can be performed to promote complete wound healing.

[0044] During vacuum sealing drainage, optimal vacuum suction conditions must be adjusted to maintain a constant negative pressure environment. Due to the closed environment, the edges of closed, negative pressure wounds are often difficult to flush. Accumulation of pus and secretions at the edges of infected wounds can make the infection difficult to control and even spread. Currently, flushing with saline is used, but this easily disrupts the original negative pressure environment, failing to maintain vacuum suction pressure and thus compromising the effectiveness of vacuum sealing drainage. Therefore, a closed negative pressure drainage device that is convenient for flushing is designed, including a sealing cover 4, a sealing gasket 1, a filling block 10, a negative pressure tube 5 and a flushing assembly, the flushing assembly including pump A 15, pump B 16, and pump C 17; the sealing cover 4 is located in the center of the sealing gasket 1 and is tightly connected to the sealing gasket 1; a suction ring 3 is tightly connected below the sealing gasket 1, the filling block 10 is detachably mounted on the sealing cover 4, a placement bin is provided in the filling block 10, and a flushing ring 9 is provided in the placement bin; the sealing cover 4, flushing ring 9, and suction ring 3 are respectively connected to pump A 15, pump B 16, and pump C 17, and the suction ring 3 is connected to pump C 17 through a fixed suction tube 11; an adhesive layer 2 is fixedly provided on the periphery of the sealing gasket 1 for tightly adhering the sealing gasket 1 to the skin, the flushing assembly also including a collecting box 12 and a flushing box 13, the pump A 15 and pump C 17 are connected to the collecting box 12 to collect the sucked-out tissue fluid and the sucked-out cleaning sewage, the pump B 16 is connected to the flushing box 13 to flush the wound.

[0045] In this embodiment, the sealing cover 4 has a negative pressure chamber opened inside, and a plurality of fixing hooks 402 are arranged under the sealing cover 4, and the filling block 10 is connected to the sealing cover 4 through the fixing hooks 402; a plurality of negative pressure holes 401 are also opened under the sealing cover 4, which are connected to the negative pressure chamber, and the negative pressure holes 401 are used for negative pressure drainage, which is to attract the liquid absorbed by the filling block 10 to the negative pressure chamber while sealing the negative pressure environment; the sealing cover 4 is connected to the pump A 15 through a fixed negative pressure tube 5, and the negative pressure tube 5 is connected to the negative pressure chamber.

[0046] In this embodiment, the filling block 10 is an existing medical polymer foam material, which is non-toxic, non-immunoreactive, non-irritating to tissues, soft and elastic. Its porous sponge-like structure gives it excellent water permeability and adsorption properties; the sealing cover 4 is made of a material with a certain hardness, and the sealing pad 1 is a bio-semipermeable film.

[0047] In this embodiment, the flushing ring 9 is a spiral disc structure, and a plurality of flushing holes are opened on one side or both sides of the flushing ring 9; the flushing ring 9 is a spiral disc structure fixedly installed on the bottom of the placement bin, and the bottom of the flushing ring 9 is an open structure. The flushing ring 9 is detachably connected to a flushing pipe 8, the inner end of the flushing ring 9 is connected to the flushing pipe 8, and the bottom of the inner end is a closed structure. The outer end of the flushing ring 9 is connected to the suction pipe 11; the flushing ring 9 is connected to pump B 16 through the flushing pipe 8; the flushing pipe 8 is connected in series with an electromagnetic three-way valve 7; the design of the flushing ring 9 can expand the flushing area, so that the flushing liquid flows along the flushing ring 9, and the flushing efficiency is improved. Two channels of the electromagnetic three-way valve 7 are connected to the flushing pipe 8, and the other channel is connected to the outside world.

[0048] In this embodiment, the attraction ring 3 is located on the periphery of the sealing cover 4, a suction chamber is opened inside the attraction ring 3, and a suction tube 11 is fixedly arranged on the attraction ring 3 and connected to the pump C 17, and the suction tube 11 is connected to the suction chamber; a suction hole is opened on the inner side of the attraction ring 3 and is connected to the suction chamber; when the pump A 15, pump B 16, and pump C 17 stop working, the suction tube 11, flushing tube 8, and suction tube 11 can be sealed and blocked.

[0049] Example 2:

[0050] See also Figure 10-11 According to embodiment 1, another way to make the flushing liquid flow in a spiral is provided, that is, another structure of the flushing ring 9; the flushing ring 9 is a deformable structure, the flushing ring 9 includes a baffle, the baffle is a deformable waterproof structure, the baffle can be deformed into a spiral structure, a circular structure, a snake-shaped structure, and a rectangular structure, the bottom of the baffle is embedded in the bottom of the placement bin, and a cover plate 18 is provided on the top of the placement bin, the cover plate 18 is covered on the baffle, and a flushing pipe 8 is detachably connected to the cover plate 18; the placement bin is connected to pump B 16 through the flushing pipe 8; the flushing pipe 8 is connected in series with an electromagnetic three-way valve 7, a flushing ring 9, a flushing ring 9, a suction pipe 11, a flushing pipe 8, a flushing ring 9, a flushing pipe 8, a pump B 16, and a flushing pipe 8, an electromagnetic three-way valve 7; the flushing liquid is input from the cover plate 18 into the placement bin through the action of the baffle forming a spiral structure, and under the action of the spiral baffle, the flushing liquid flows in a spiral, thereby achieving flushing and improving flushing efficiency; the baffle is deformed into structures of different shapes to meet the needs of flushing areas of different shapes.

[0051] Example 3:

[0052] See also Figure 1-11According to Examples 1-2, in order to achieve a constant negative pressure value in a closed negative pressure environment, a closed negative pressure drainage system that is convenient for flushing is designed based on a closed negative pressure drainage device that is convenient for flushing. The system includes a sensor 6 installed on a negative pressure tube 5 and a controller 14 installed on a flushing assembly. The controller 14 is used to control different operating modes of the system, including a normal mode, a flushing mode, and a transition mode. The sensor 6 is used to detect the negative pressure value in different operating modes. The sensor 6 is used to detect the negative pressure value in the closed negative pressure environment. The controller 14 includes a control module, a timing module, a delay module, a display module, and an input module.

[0053] The input module is used to input the constant negative pressure value of negative pressure suction in normal mode, the flushing time point and flushing duration in flushing mode, the flushing power, and the duration of transition mode;

[0054] The timing module is used to count time by year, month, day, hour, minute and second;

[0055] The delay module is used to control the end time of transition mode and flushing mode;

[0056] The display module is used to display the data of the timing module, the working mode status and the working time of the working mode;

[0057] The control module is used to receive the data from the sensor 6 and compare it with the input constant negative pressure value, and according to the comparison result, control the operation of the electromagnetic three-way valve 7, pump A 15, pump B 16, and pump C 17;

[0058] The system operates in normal mode. When the flushing time is reached, the controller 14 switches the operating mode to the flushing mode. After the flushing time is over, the controller 14 switches the operating mode to the transition mode to further aspirate the residual liquid in the filling block 10. After the transition mode time is over, the controller 14 switches the operating mode to the normal mode.

[0059] The following is a specific example of work switching; through the input module, input a constant negative pressure value of -325mmHg, a flushing time of 20:30:00 on January 14, XXXX, a flushing duration of 10 minutes, a flushing power of 40W, and a transition mode duration of 1 minute;

[0060] The time is calculated by the timing module, and when the flushing time is reached at 20:30:00 on January 14, XXXX, the control module is switched to the flushing mode with a flushing power of 40W. After flushing for 10 minutes through the delay module, the control module is switched to the transition mode to absorb the residual moisture. After 1 minute through the delay module, the control module is switched to the normal mode. It should be noted that multiple flushing time points can be set.

[0061] Example 4:

[0062] See also Figure 1-11 According to Examples 1-3, the following describes how the system ensures a constant negative pressure value of the closed negative pressure in normal mode:

[0063] In normal mode, the controller 14 controls the opening and closing of the electromagnetic three-way valve 7 and the operation and stopping of the pump A 15 according to the negative pressure value detected by the sensor 6. If the negative pressure value detected by the sensor 6 reaches the constant negative pressure value of -325 mmHg, the controller 14 controls the electromagnetic three-way valve 7 to be isolated from the outside world and the pump A 15 to stop working.

[0064] If the detected negative pressure value of -500 mmHg is lower than the constant negative pressure value of -325 mmHg, the pump A 15 stops working, and the electromagnetic three-way valve 7 is connected to the outside, increasing the internal pressure until the detected negative pressure value reaches the constant negative pressure value of -325 mmHg. Then the controller 14 controls the electromagnetic three-way valve 7 to be isolated from the outside and the pump A 15 stops working;

[0065] If the detected negative pressure value -200mmHg is higher than the constant negative pressure value -325mmHg, the electromagnetic three-way valve 7 is controlled to be isolated from the outside world, and pump A 15 starts to work with negative pressure suction to reduce the internal pressure until the detected negative pressure value reaches the constant negative pressure value -325mmHg. Then the controller 14 controls the electromagnetic three-way valve 7 to be isolated from the outside world and pump A 15 stops working.

[0066] Example 5:

[0067] See also Figure 1-11 According to Examples 1-4, the following describes how the system ensures a constant negative pressure value of the closed negative pressure in the flushing mode:

[0068] In the flushing mode, the controller 14 controls the pump B 16 to operate at the input flushing power of 40W. Then, the controller 14 controls the power of the pump C 17 according to the negative pressure value detected by the sensor 6. If the negative pressure value detected by the sensor 6 reaches the constant negative pressure value of -325mmHg, the controller 14 controls the pump B 16 to 40W and the pump C 17 to maintain this power for flushing and suction.

[0069] If the detected negative pressure value -200 mmHg is higher than the constant negative pressure value -325 mmHg, the suction power of pump C 17 is increased to reduce the internal pressure until the detected negative pressure value reaches the constant negative pressure value -325 mmHg. Then the controller 14 controls pump B 1640 W and pump C 1750 W to maintain this power for flushing and suction.

[0070] If the detected negative pressure value -500mmHg is lower than the constant negative pressure value -325mmHg, the power of pump C 17 is reduced and the internal pressure is increased until the detected negative pressure value reaches the constant negative pressure value -325mmHg. The controller 14 then controls pump B 1640W and pump C 1720W to maintain this power for flushing and suction.

[0071] Example 6:

[0072] See also Figure 1-11 According to Examples 1-5, the following describes how the system ensures a constant negative pressure value of the closed negative pressure in the transition mode:

[0073] In the transition mode, the controller 14 controls the pump B 16 to stop working, and then controls the electromagnetic three-way valve 7 to connect to the outside world; controls the power of the pump C 17 according to the negative pressure value detected by the sensor 6; if the negative pressure value detected by the sensor 6 reaches the constant negative pressure value of -325 mmHg, the controller 14 controls the pump C 17 to maintain this power for suction;

[0074] If the detected negative pressure value -230 mmHg is higher than the constant negative pressure value -325 mmHg, the suction power of pump C 17 is increased to reduce the internal pressure until the detected negative pressure value reaches the constant negative pressure value -325 mmHg. Then the controller 14 controls pump C 1755W to maintain this power for suction;

[0075] If the detected negative pressure value -400mmHg is lower than the constant negative pressure value -325mmHg, the power of pump C 17 is reduced and the internal pressure is increased until the detected negative pressure value reaches the constant negative pressure value -325mmHg. The controller 14 then controls pump C 1730W to maintain this power for suction. After the transition mode is completed, the controller 14 controls the electromagnetic three-way valve 7 to be isolated from the outside world, pump C 17 stops working, and enters normal mode.

[0076] Example 7:

[0077] See also Figure 1-11 According to Examples 1-6, the controller 14 is provided with a connection module, which can be connected to an external network to transmit real-time data. Specifically, the controller 14 can be connected to a computer to transmit data to the computer. The negative pressure data and mode information can be viewed on the computer, and the negative pressure information can also be viewed on a mobile phone; the pump A 15, pump B 16, and pump C 17 of this application can be replaced by an existing central negative pressure machine.

[0078] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A closed negative pressure drainage device that is easy to flush, characterized in that: It includes a sealing cover, a sealing gasket, a filling block, a negative pressure tube and a flushing assembly. The flushing assembly includes pump A, pump B and pump C. The sealing cover is located in the center of the sealing gasket and is tightly connected to the sealing gasket. A suction ring is tightly connected below the sealing gasket. The filling block is detachably mounted on the sealing cover. A placement bin is provided in the filling block, and a flushing ring is provided in the placement bin. The sealing cover, flushing ring and suction ring are connected to pump A, pump B and pump C respectively, and the suction ring is connected to pump C through a fixed suction tube.

2. A closed negative pressure drainage device and system for easy flushing according to claim 1, characterized in that: A negative pressure chamber is opened inside the sealing cover, and a plurality of fixing hooks are arranged below the sealing cover, and the filling block is connected to the sealing cover through the fixing hooks; a plurality of negative pressure holes are also opened below the sealing cover, which are connected to the negative pressure chamber; a negative pressure pipe is fixed on the sealing cover and connected to Pump A, and the negative pressure pipe is connected to the negative pressure chamber.

3. A closed negative pressure drainage device that is easy to flush according to claim 1, characterized in that: The flushing ring is a spiral disc structure fixedly installed on the bottom of the placement bin, the bottom of the flushing ring is an open structure, the flushing ring is detachably connected to a flushing pipe, the inner end of the flushing ring is connected to the flushing pipe, the bottom of the inner end is a closed structure, the outer end of the flushing ring is connected to the suction pipe; the flushing ring is connected to pump B through the flushing pipe; the flushing pipe is connected in series with an electromagnetic three-way valve.

4. A closed negative pressure drainage device that is easy to flush according to claim 1, characterized in that: The flushing ring is a deformable structure, and the flushing ring includes a baffle. The baffle is a deformable waterproof structure. The baffle can be deformed into a spiral structure, a circular structure, a snake-shaped structure, and a rectangular structure. The bottom of the baffle is embedded in the bottom of the placement bin, and a cover is provided on the top of the placement bin. The cover is covered above the baffle, and a flushing pipe is detachably connected to the cover; the placement bin is connected to pump B through the flushing pipe; an electromagnetic three-way valve is connected in series on the flushing pipe.

5. A closed negative pressure drainage device that is easy to flush according to claim 1, characterized in that: The attraction ring is located on the periphery of the sealing cover, a suction chamber is provided inside the attraction ring, and the suction pipe is connected with the suction chamber; a suction hole is provided on the inner side of the attraction ring and is connected with the suction chamber.

6. A closed negative pressure drainage device that is easy to flush according to claim 1, characterized in that: An adhesive layer is fixedly provided on the periphery of the sealing gasket; the flushing assembly further comprises a collection box and a flushing box, the pumps A and C are connected to the collection box, and the pump B is connected to the flushing box.

7. A closed negative pressure drainage system that is easy to flush, characterized in that: It includes a sensor installed on the negative pressure pipe and a controller installed on the flushing assembly. The controller is used to control different working modes of the system, including normal mode, flushing mode, and transition mode. The sensor is used to detect the negative pressure value in different working modes. When the flushing time is reached, the controller switches the working mode to the flushing mode; after the flushing time is over, the controller switches the working mode to the transition mode to further absorb the residual liquid in the filling block; after the transition mode time is over, the controller switches the working mode to the normal mode.

8. A closed negative pressure drainage system for easy flushing according to claim 7, characterized in that: The sensor is used to detect the negative pressure value of the closed negative pressure environment, and the controller includes a control module, a timing module, a delay module, a display module, and an input module; The input module is used to input the constant negative pressure value of negative pressure suction in normal mode, the flushing time point and flushing duration in flushing mode, the flushing power, and the duration of transition mode; The timing module is used to count time by year, month, day, hour, minute and second; The delay module is used to control the end time of transition mode and flushing mode; The display module is used to display the data of the timing module, the working mode status and the working time of the working mode; The control module is used to receive the data from the sensor and compare it with the input constant negative pressure value, and control the operation of the electromagnetic three-way valve, pump A, pump B, and pump C based on the comparison result.

9. A closed negative pressure drainage system for easy flushing according to claim 7, characterized in that: In the normal mode, the controller controls the opening and closing of the electromagnetic three-way valve and the operation and stopping of Pump A according to the negative pressure value detected by the sensor; if the negative pressure value detected by the sensor reaches a constant negative pressure value, the controller controls the electromagnetic three-way valve to be isolated from the outside world and Pump A stops working; if the negative pressure value detected is lower than the constant negative pressure value, Pump A stops working, the electromagnetic three-way valve is connected to the outside world, and the internal pressure is increased until the negative pressure value detected reaches the constant negative pressure value, then the controller controls the electromagnetic three-way valve to be isolated from the outside world and Pump A stops working; if the negative pressure value detected is higher than the constant negative pressure value, the electromagnetic three-way valve is controlled to be isolated from the outside world, Pump A starts working negative pressure suction, reduces the internal pressure until the negative pressure value detected reaches the constant negative pressure value, then the controller controls the electromagnetic three-way valve to be isolated from the outside world and Pump A stops working; In the flushing mode, the controller controls pump B to operate according to the input flushing power, and then controls the power of pump C according to the negative pressure value detected by the sensor; if the negative pressure value detected by the sensor reaches a constant negative pressure value, the controller controls pump B and pump C to maintain this power for flushing and suction; if the negative pressure value detected is higher than the constant negative pressure value, the suction power of pump C is increased and the internal pressure is reduced until the negative pressure value detected reaches the constant negative pressure value, and the controller controls pump B and pump C to maintain this power for flushing and suction; if the negative pressure value detected is lower than the constant negative pressure value, the power of pump C is reduced and the internal pressure is increased until the negative pressure value detected reaches the constant negative pressure value, and the controller controls pump B and pump C to maintain this power for flushing and suction; In the transition mode, the controller controls pump B to stop working, and then controls the electromagnetic three-way valve to connect with the outside world; controls the power of pump C according to the negative pressure value detected by the sensor; if the negative pressure value detected by the sensor reaches a constant negative pressure value, the controller controls pump C to maintain this power for suction; if the negative pressure value detected is higher than the constant negative pressure value, the power of pump C to suction is increased, and the internal pressure is reduced until the negative pressure value detected reaches a constant negative pressure value, and the controller controls pump C to maintain this power for suction; if the negative pressure value detected is lower than the constant negative pressure value, the power of pump C is reduced, and the internal pressure is increased until the negative pressure value detected reaches a constant negative pressure value, and the controller controls pump C to maintain this power for suction; after the transition mode is completed, the controller controls the electromagnetic three-way valve to be isolated from the outside world, pump C stops working, and enters normal mode.

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