CN118236566A - A negative pressure drainage device for postoperative fluid discharge - Google Patents

Abstract

The application provides a negative pressure drainage device for postoperative effusion discharge, which comprises: the whole drainage case that sets up for sealing, drainage incasement is fixed with the division board, and the division board separates the drainage case inner chamber into stock solution chamber and protection chamber, the intercommunication mouth has been seted up at division board side top, and the interior sealing plug that is provided with it sealedly that just communicates the mouth, the drainage case top is close to the position department of intercommunication mouth and is fixed with the mounting box, and the mounting box side is provided with the elastic locating component to the sealing plug location, drainage case side-mounting has the subassembly of bleeding. This negative pressure drainage device is used in postoperative hydrops emission, internal pressure is adjustable setting, is applicable to the drainage of patient's internal hydrops under the different circumstances, and can prevent that the hydrops from getting into in the subassembly of bleeding and causing the influence to its use by the subassembly adsorption, this drainage device is convenient for medical personnel observe hydrops state or to the hydrops sample after collecting the hydrops simultaneously, the use of this drainage device of being convenient for.

Description

A negative pressure drainage device for postoperative fluid discharge

Technical Field

The invention relates to the technical field of drainage devices, and in particular to a negative pressure drainage device for discharging postoperative effusion.

Background technique

After surgery, patients usually need to drain the accumulated fluid in their bodies to the outside to facilitate their rehabilitation. At present, common drainage devices include drainage bags, drainage bottles, etc. When the drainage device is in use, in order to ensure that the drainage tube effectively drains the accumulated fluid, negative pressure is usually set inside the drainage device. However, the negative pressure inside common drainage devices is usually fixed, which is not convenient to adjust according to usage requirements. In addition, after the common drainage device collects the accumulated fluid, it is not conducive for medical staff to observe or sample the state of the accumulated fluid, resulting in certain deficiencies in the use of the drainage device.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the existing defects and provide a negative pressure drainage device for postoperative fluid discharge. The internal pressure can be adjusted and is suitable for the drainage of fluid in patients under different conditions. It can also prevent the fluid from entering the vacuum component due to adsorption by the vacuum component and affecting its use. At the same time, after the fluid is collected by the drainage device, it is convenient for medical staff to observe the state of the fluid or take samples of the fluid, which facilitates the use of the drainage device and can effectively solve the problems in the background technology.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a negative pressure drainage device for postoperative fluid discharge, comprising: a drainage box that is sealed as a whole, a partition plate is fixed inside the drainage box, and the partition plate divides the inner cavity of the drainage box into a liquid storage cavity and a protective cavity, a connecting port is opened at the top of the side of the partition plate, and a sealing plug is slidably arranged in the connecting port to seal it, an installation box is fixed at a position near the connecting port on the top of the drainage box, and an elastic positioning component for positioning the sealing plug is arranged on the side of the installation box, an exhaust component is installed on the side of the drainage box, and the exhaust component is connected with the protective cavity, a connecting pipe connected with the liquid storage cavity is arranged on the side of the drainage box, and a detachable drainage pipe is installed at the end of the connecting pipe.

As a preferred technical solution of the present invention, a sealing plate is fixed in the installation box, and the elastic positioning assembly includes a guide rod and a spring. The guide rod is slidably connected to the sealing plate, and the end of the guide rod passes through and extends to the outside of the sealing plate. The sealing plug is installed on the end, and the spring is sleeved on the outside of the guide rod and is used to position the guide rod.

As a preferred technical solution of the present invention, an external thread is provided at one end of the guide rod away from the sealing plug, and an adjusting nut is threadedly connected to the outer side of the guide rod, the spring is located between the sealing plate and the adjusting nut, the upper part of the installation box is located at the top of the drainage box, and an adjustment port is provided at the top of the installation box near the elastic positioning component, and a baffle plate for shielding the adjustment port is rotatably arranged on the side of the installation box.

As a preferred technical solution of the present invention, the exhaust assembly includes an exhaust pump installed on the side of the drainage box, and an exhaust pipe is provided at the exhaust port of the exhaust pump. The exhaust pipe is fixed on the side of the drainage box and connected to the upper part of the protective cavity.

As a preferred technical solution of the present invention, a collection box is sealed in the protective cavity, and the collection box is detachable. The top of the collection box is open, and positioning screws for positioning the collection box are installed on the side of the drainage box.

As a preferred technical solution of the present invention, the connecting tube includes a first connecting tube and a second connecting tube, the first connecting tube is fixed to the side of the drainage box and connected to the bottom of the liquid storage chamber, an installation tube is arranged between the first connecting tube and the second connecting tube, and positioning rings are installed at the connection between the installation tube and the first connecting tube and at the connection between the installation tube and the second connecting tube. The inner diameter of the first connecting tube and the inner diameter of the second connecting tube are both smaller than the inner diameter of the installation tube, and both ends of the installation tube are conical structures, a sealing ball is arranged in the installation tube, and the diameter of the sealing ball is smaller than the inner diameter of the installation tube.

As a preferred technical solution of the present invention, a connector connected to the inner cavity of the second connecting tube is fixed at one end away from the mounting tube, and a mounting head connected to the inner cavity of the drainage tube is fixed at the end thereof, and the mounting head is adapted to the connector.

As a preferred technical solution of the present invention, a discharge pipe is installed on the side of the drainage box, and the discharge pipe is connected to the bottom of the liquid storage chamber, and a valve is installed on the discharge pipe.

As a preferred technical solution of the present invention, a mounting shaft is rotatably installed in the drainage box, and a plurality of stirring blades are fixed on the side of the mounting shaft. A motor is installed on the side of the drainage box, and the output shaft of the motor is fixedly connected to the mounting shaft.

As a preferred technical solution of the present invention, a liquid level detection sensor is installed on the upper part of the inner cavity of the liquid storage chamber, the detection end of the liquid level detection sensor is at the same height as the opening on the side of the installation box, and a mounting port connected to the inner cavity of the liquid storage chamber is opened on the side of the drainage box, and a transparent plate is installed in the mounting port.

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

1. Drain the accumulated fluid in the patient's body through the drainage tube arranged on the drainage box. During this process, if negative pressure is required in the drainage box, the suction pump can be controlled by an external controller. The suction pump draws gas in the protective cavity through the suction tube to reduce the air pressure in the protective cavity. Because the air pressure in the liquid storage cavity is greater than the air pressure in the protective cavity, the sealing plug moves out of the connecting port under the action of the air pressure difference. Under the action of the connecting port, the air pressure in the liquid storage cavity and the protective cavity is balanced, so that the liquid storage cavity is in a negative pressure state, which is convenient for the drainage device to drain the accumulated fluid in the patient's body into the liquid storage cavity through the drainage tube and store it in the liquid storage cavity.

2. If there is a blockage in the effusion and the adsorption force of the drainage tube needs to be increased, the adjusting nut on the side of the guide rod is rotated to squeeze the spring to reduce the elastic sensitivity of the spring. At this time, a larger pressure difference is needed to push the sealing plug out of the connecting port, thereby increasing the negative pressure value in the fluid storage chamber and facilitating the drainage of the effusion in the patient's body. The elastic sensitivity of the spring can be adjusted by adjusting the position of the adjusting nut, which is suitable for different drainage needs and convenient for the use of the drainage device.

3. The accumulated fluid discharged from the patient's body is stored in the fluid storage chamber in the drainage box. Medical staff can observe the color, concentration, etc. of the accumulated fluid through the transparent plate. At the same time, they can also open the valve to discharge the accumulated fluid through the discharge pipe, which is convenient for sampling and testing the accumulated fluid in the storage chamber or discharging the accumulated fluid in the storage chamber. When sampling the accumulated fluid, the stirring blade on the outside of the mounting shaft can be driven by a motor to rotate to stir the collected accumulated fluid, which is convenient for the accuracy of the sampling and testing of the accumulated fluid. At the same time, after all the accumulated fluid is discharged, clean water or saline can be injected into the drainage box through the connecting pipe, and the inside of the drainage box can be cleaned under the stirring action of the stirring blade.

4. When the accumulated liquid enters the second connecting tube from the first connecting tube, it passes through the installation tube, and the sealing ball floats on the liquid surface of the accumulated liquid under the action of the buoyancy of the accumulated liquid, ensuring that the accumulated liquid effectively enters the second connecting tube from the first connecting tube. When the accumulated liquid in the drainage box enters the first connecting tube from the second connecting tube, the sealing ball floating on the liquid surface of the accumulated liquid blocks and seals the end of the second connecting tube to prevent the accumulated liquid from flowing back.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the present invention;

FIG2 is a schematic cross-sectional view of the present invention;

FIG3 is a schematic diagram of the enlarged structure of point A in FIG2;

FIG4 is an enlarged schematic diagram of the structure at B in FIG2;

FIG5 is a front view of the structure of FIG2;

FIG6 is a schematic diagram of the structure of the present invention from another viewing angle;

FIG7 is a schematic diagram of the structure of the installation box of the present invention;

FIG8 is a schematic structural diagram of the installation box of the present invention from another viewing angle;

FIG. 9 is a schematic cross-sectional view of the mounting box of the present invention.

In the figure: 1 drainage box, 2 partition plate, 3 installation box, 31 sealing plate, 32 guide rod, 33 spring, 34 adjusting nut, 35 sealing plug, 36 shielding plate, 4 vacuum pump, 41 vacuum pipe, 5 first connecting pipe, 6 second connecting pipe, 61 connecting head, 7 installation cylinder, 71 sealing ball, 72 positioning ring, 8 drainage pipe, 81 installation head, 9 discharge pipe, 91 valve, 10 installation shaft, 11 stirring blade, 12 motor, 13 collection box, 14 positioning screw, 15 transparent plate, 16 liquid level detection sensor.

Detailed ways

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

Please refer to Figures 1-9. The present invention provides a technical solution: a negative pressure drainage device for postoperative fluid discharge, comprising: a drainage box 1 that is sealed as a whole, a partition plate 2 is fixed inside the drainage box 1, and the partition plate 2 divides the inner cavity of the drainage box 1 into a liquid storage cavity and a protective cavity, a connecting port is opened on the top of the side of the partition plate 2, and a sealing plug 35 is slidably provided in the connecting port to seal it. When there is a pressure difference between the liquid storage cavity and the protective cavity, the sealing plug 35 is moved out of the connecting port under the action of air pressure. At this time, the liquid storage cavity and the protective cavity are connected through the connecting port, which is convenient for the air pressure balance in the liquid storage cavity and the protective cavity. A mounting box 3 is fixed at a position near the communicating port on the top of the mounting box 3, and an elastic positioning component for positioning the sealing plug 35 is arranged on the side of the mounting box 3. The elastic sensitivity of the elastic positioning component is adjustable and is used to adjust the negative pressure in the liquid storage cavity and the protective cavity, so as to facilitate drainage of the accumulated fluid in the patient's body according to needs. A suction component is installed on the side of the drainage box 1, and the suction component is connected with the protective cavity. The air pressure in the protective cavity is adjusted by the suction component, so as to facilitate the pressure difference between the liquid storage cavity and the protective cavity. A connecting pipe connected with the liquid storage cavity is arranged on the side of the drainage box 1, and a detachable drainage pipe 8 is installed at the end of the connecting pipe.

A sealing plate 31 is fixed in the installation box 3, and the elastic positioning assembly includes a guide rod 32 and a spring 33. The guide rod 32 is slidably connected to the sealing plate 31, and the end of the guide rod 32 passes through and extends to the outside of the sealing plate 31. The sealing plug 35 is installed on the end. The spring 33 is sleeved on the outside of the guide rod 32 and is used for positioning the guide rod 32. The sealing plate 31 is separated into a sealed space inside the installation box 3, and the elastic positioning assembly is arranged in the sealed space to prevent the accumulation of liquid from affecting the use of the elastic positioning assembly.

The guide rod 32 is provided with an external thread at one end away from the sealing plug 35, and the outer side of the guide rod 32 is threadedly connected to an adjusting nut 34, the spring 33 is located between the sealing plate 31 and the adjusting nut 34, the upper part of the mounting box 3 is located at the top of the drainage box 1, and an adjusting port is provided at the top of the mounting box 3 near the elastic positioning component, the adjusting port is convenient for adjusting the position of the adjusting nut 34, and a baffle plate 36 is rotatably provided on the side of the mounting box 3 to block the adjusting port. If there is a blockage in the effusion and it is necessary to increase the adsorption force of the drainage tube, the adjusting nut 34 on the side of the guide rod 32 is rotated to squeeze the spring 33 to reduce the elastic sensitivity of the spring 33. At this time, a larger pressure difference is required to push the sealing plug 35 out of the connecting port, thereby increasing the negative pressure value in the liquid storage chamber and facilitating the drainage of the effusion in the patient's body. The elastic sensitivity of the spring 33 is adjusted by adjusting the position of the adjusting nut 34, which is suitable for different drainage needs and convenient for the use of the drainage device.

The suction component includes an suction pump 4 installed on the side of the drainage box 1, and an suction pipe 41 is arranged at the suction port of the suction pump 4. The suction pipe 41 is fixed to the side of the drainage box 1 and connected with the upper part of the protective cavity. The fluid accumulated in the patient's body is drained through the drainage pipe 8 arranged on the drainage box 1. During this process, if negative pressure is required in the drainage box 1, the suction pump 4 can be controlled to work through an external controller. The suction pump 4 extracts the gas in the protective cavity through the suction pipe 41 to reduce the air pressure in the protective cavity. Because the air pressure in the liquid storage cavity is greater than the air pressure in the protective cavity, the sealing plug 35 is moved out of the connecting port under the action of the air pressure difference. Under the action of the connecting port, the air pressure in the liquid storage cavity and the protective cavity is balanced, so that the liquid storage cavity is in a negative pressure state, which is convenient for the drainage device to drain the accumulated fluid in the patient's body into the liquid storage cavity through the drainage pipe 8 and store it in the liquid storage cavity.

A collecting box 13 is sealed in the protective cavity, and the collecting box 13 is detachable. The top of the collecting box 13 is opened, and a positioning screw 14 for positioning the collecting box 13 is installed on the side of the drainage box 1. The protective cavity is used to prevent the accumulated liquid from being sucked into the interior by the vacuum component and affecting its use. When there is too much liquid in the liquid storage cavity, the accumulated liquid overflows into the protective cavity through the connecting port. The collecting box 13 arranged in the protective cavity is used to collect the overflowed accumulated liquid.

The connecting pipe includes a first connecting pipe 5 and a second connecting pipe 6. The first connecting pipe 5 is fixed to the side of the drainage box 1 and is connected to the bottom of the liquid storage chamber. A mounting tube 7 is arranged between the first connecting pipe 5 and the second connecting pipe 6. Positioning rings 72 are installed at the connection between the mounting tube 7 and the first connecting pipe 5 and the connection between the mounting tube 7 and the second connecting pipe 6. The inner diameters of the first connecting pipe 5 and the second connecting pipe 6 are both smaller than the inner diameter of the mounting tube 7, and both ends of the mounting tube 7 are conical structures. A sealing ball 71 is arranged in the mounting tube 7, and the diameter of the sealing ball 71 is smaller than the inner diameter of the mounting tube 7. When the accumulated liquid enters the second connecting pipe 6 from the first connecting pipe 5, it passes through the mounting tube 7. The sealing ball 71 floats on the liquid surface of the accumulated liquid under the action of the buoyancy of the accumulated liquid, ensuring that the accumulated liquid effectively enters the second connecting pipe 6 from the first connecting pipe 5. When the accumulated liquid in the drainage box 1 enters the first connecting pipe 5 from the second connecting pipe 6, the sealing ball 71 floating at the liquid surface of the accumulated liquid blocks and seals the end of the second connecting pipe 6 to prevent the accumulated liquid from flowing back.

A connector 61 communicating with the inner cavity of the second connecting tube 6 is fixed at one end away from the mounting tube 7, and a mounting head 81 communicating with the inner cavity of the drainage tube 8 is fixed at the end thereof. The mounting head 81 is adapted to the connector 61 to facilitate the disassembly and assembly of the drainage tube 8 and the connecting tube.

A discharge pipe 9 is installed on the side of the drainage box 1, and the discharge pipe 9 is connected to the bottom of the liquid storage chamber. A valve 91 is installed on the discharge pipe 9. The valve 91 can be opened to discharge the accumulated liquid through the discharge pipe 9, which is convenient for sampling and testing the accumulated liquid in the liquid storage chamber or discharging the accumulated liquid in the liquid storage chamber.

A mounting shaft 10 is rotatably installed in the drainage box 1, and a plurality of stirring blades 11 are fixed to the side of the mounting shaft 10. A motor 12 is installed on the side of the drainage box 1, and the output shaft of the motor 12 is fixedly connected to the mounting shaft 10. When sampling the effusion, the stirring blades 11 on the outside of the mounting shaft 10 can be driven by the motor 12 to rotate and stir the collected effusion, which facilitates the accuracy of the effusion sampling and detection. At the same time, after all the effusion is discharged, clean water or saline can be injected into the drainage box 1 through the connecting pipe, and the inside of the drainage box 1 is cleaned under the stirring action of the stirring blades 11.

A liquid level detection sensor 16 is installed on the upper part of the inner cavity of the liquid storage chamber. The detection end of the liquid level detection sensor 16 is at the same height as the opening on the side of the installation box 3. When the liquid level detection sensor 16 detects that there is too much accumulated fluid, it sends an alarm signal to the external controller, so that medical staff can deal with it at the first time. A mounting port connected to the inner cavity of the liquid storage chamber is opened on the side of the drainage box 1. A transparent plate 15 is installed in the mounting port. The accumulated fluid discharged from the patient's body is stored in the liquid storage chamber in the drainage box 1. Medical staff can observe the color, concentration, etc. of the accumulated fluid through the transparent plate 15. The transparent plate 15 includes but is not limited to a glass plate or a plastic plate.

The vacuum pump 4, motor 12 and liquid level detection sensor 16 used in the present invention are all commonly used electronic components in the prior art. Their working methods and circuit structures are well-known technologies and are not described here. The vacuum pump 4, motor 12 and liquid level detection sensor 16 are all controlled by an external controller.

When using:

The accumulated fluid in the patient's body is drained through the drainage tube 8 provided on the drainage box 1. In this process, if the drainage box 1 needs to be negatively pressurized, the suction pump 4 can be controlled to work through the external controller. The suction pump 4 extracts the gas in the protective cavity through the suction tube 41 to reduce the air pressure in the protective cavity. Because the air pressure in the liquid storage cavity is greater than the air pressure in the protective cavity, the sealing plug 35 is moved out of the connecting port under the action of the air pressure difference. Under the action of the connecting port, the air pressure in the liquid storage cavity and the protective cavity is balanced, so that the liquid storage cavity is in a negative pressure state, which is convenient for the drainage device to drain the accumulated fluid in the patient's body into the liquid storage cavity through the drainage tube 8 and store it in the liquid storage cavity;

If there is a blockage in the effusion and it is necessary to increase the adsorption force of the drainage tube, the adjusting nut 34 on the side of the guide rod 32 is rotated to squeeze the spring 33, so that the elastic sensitivity of the spring 33 is reduced. At this time, a larger pressure difference is required to push the sealing plug 35 out of the connecting port, increase the negative pressure value in the liquid storage cavity, and facilitate the drainage of the effusion in the patient's body. The elastic sensitivity of the spring 33 is adjusted by adjusting the position of the adjusting nut 34, which is suitable for different drainage needs and convenient for the use of the drainage device;

The accumulated fluid discharged from the patient's body is stored in the fluid storage cavity in the drainage box 1. Medical staff can observe the color, concentration, etc. of the accumulated fluid through the transparent plate 15, and can also open the valve 91 to discharge the accumulated fluid through the discharge pipe 9, which is convenient for sampling and testing the accumulated fluid in the fluid storage cavity or discharging the accumulated fluid in the fluid storage cavity. When sampling the accumulated fluid, the stirring blade 11 on the outside of the mounting shaft 10 can be driven by the motor 12 to rotate to stir the collected accumulated fluid, which is convenient for the accuracy of the sampling and testing of the accumulated fluid. At the same time, after all the accumulated fluid is discharged, clean water or physiological saline can be injected into the drainage box 1 through the connecting pipe, and the inside of the drainage box 1 is cleaned under the stirring action of the stirring blade 11;

When the accumulated liquid enters the second connecting tube 6 from the first connecting tube 5, it passes through the installation tube 7. The sealing ball 71 floats on the liquid surface of the accumulated liquid under the action of the buoyancy of the accumulated liquid, ensuring that the accumulated liquid effectively enters the second connecting tube 6 from the first connecting tube 5. When the accumulated liquid in the drainage box 1 enters the first connecting tube 5 from the second connecting tube 6, the sealing ball 71 floating on the liquid surface of the accumulated liquid blocks and seals the end of the second connecting tube 6 to prevent the accumulated liquid from flowing back.

The undisclosed parts in the present invention are all prior art, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims (10)

1. Negative pressure drainage device for postoperative hydrops discharge, characterized by comprising: the drainage box (1) that wholly set up for sealing, drainage box (1) internal fixation has division board (2), and division board (2) are separated drainage box (1) inner chamber into stock solution chamber and protection chamber, the intercommunication mouth has been seted up at division board (2) side top, and the interior sealing plug (35) that are provided with rather than sealed of intercommunication mouth, the position department that is close to the intercommunication mouth in drainage box (1) top is fixed with mounting box (3), and mounting box (3) side is provided with the elastic locating component to sealing plug (35) location, drainage box (1) side-mounting has the subassembly of bleeding, and bleed subassembly and protection chamber intercommunication, drainage box (1) side is provided with communicating pipe with the stock solution chamber intercommunication, communicating pipe tip installs detachable drainage tube (8).

2. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the mounting box (3) is internally fixed with a sealing plate (31), the elastic positioning assembly comprises a guide rod (32) and a spring (33), the guide rod (32) is in sliding connection with the sealing plate (31), the end part of the guide rod (32) penetrates through and extends to the outer side of the sealing plate (31), the sealing plug (35) is used for mounting the end part, and the spring (33) is sleeved on the outer side of the guide rod (32) and is used for positioning the guide rod (32).

3. The negative pressure drainage device for postoperative drainage of effusion according to claim 2, wherein: external screw threads are arranged at one end, far away from the sealing plug (35), of the guide rod (32), an adjusting nut (34) is connected with the external screw threads of the guide rod (32), a spring (33) is located between the sealing plate (31) and the adjusting nut (34), the top of the drainage box (1) is located on the upper portion of the installation box (3), an adjusting opening is arranged at the top of the installation box (3) close to the position of the elastic positioning assembly, and a shielding plate (36) for shielding the adjusting opening is arranged on the side face of the installation box (3) in a rotating mode.

4. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the air extraction assembly comprises an air extraction pump (4) arranged on the side face of the drainage box (1), an air extraction pipe (41) is arranged at an air extraction opening of the air extraction pump (4), and the air extraction pipe (41) is fixed on the side face of the drainage box (1) and is communicated with the upper portion of the protection cavity.

5. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the protection intracavity is sealed to be provided with collecting box (13), and collecting box (13) are for dismantling the setting, collecting box (13) top is the opening setting, set screw (14) to collecting box (13) location are installed to drainage case (1) side.

6. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the utility model discloses a liquid storage device, including drainage tank (1), liquid storage cavity, communicating pipe, including first communicating pipe (5) and second communicating pipe (6), first communicating pipe (5) are fixed in drainage tank (1) side and are communicated with liquid storage cavity bottom, be provided with installation section of thick bamboo (7) between first communicating pipe (5) and second communicating pipe (6), locating ring (72) are all installed in junction, installation section of thick bamboo (7) and the junction of second communicating pipe (6) of installation section of thick bamboo (7) and first communicating pipe (5), first communicating pipe (5) internal diameter, second communicating pipe (6) internal diameter all are less than installation section of thick bamboo (7) internal diameter, and installation section of thick bamboo (7) both ends are the toper structure, be provided with sealing ball (71) in installation section of thick bamboo (7), and sealing ball (71) diameter are less than installation section of thick bamboo (7) internal diameter.

7. The negative pressure drainage device for postoperative drainage of effusion according to claim 6, wherein: one end of the second communicating pipe (6) far away from the mounting cylinder (7) is fixed with a connector (61) communicated with the inner cavity of the second communicating pipe, the end part of the drainage tube (8) is fixed with a mounting head (81) communicated with the inner cavity of the drainage tube, and the mounting head (81) is matched with the connector (61).

8. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the drainage box (1) side-mounting has discharge tube (9), and discharge tube (9) and stock solution chamber bottom intercommunication, install valve (91) on discharge tube (9).

9. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the novel stirring device is characterized in that the installation shaft (10) is rotatably installed in the drainage box (1), a plurality of stirring blades (11) are fixed on the side face of the installation shaft (10), the motor (12) is installed on the side face of the drainage box (1), and an output shaft of the motor (12) is fixedly connected with the installation shaft (10).

10. The negative pressure drainage device for postoperative drainage of effusion according to claim 1, wherein: the liquid level detection sensor (16) is installed on the upper portion of the inner cavity of the liquid storage cavity, the detection end of the liquid level detection sensor (16) and the opening on the side face of the installation box (3) are located at the same height, an installation opening communicated with the inner cavity of the liquid storage cavity is formed in the side face of the drainage box (1), and a transparent plate (15) is installed in the installation opening.