Negative pressure drainage device

Abstract

The utility model provides a negative pressure drainage device which comprises a drainage ball body, a negative pressure pump is arranged in the drainage ball body, the air inlet end of the negative pressure pump is connected with an air inlet pipe communicated with the interior of the drainage ball body, and the air outlet end of the negative pressure pump is connected with an air outlet pipe communicated with the atmosphere. The pressure adjusting assembly comprises an air supplementing pipe, a threaded sleeve and a pressure adjusting rod, the air supplementing pipe is in a Z shape and comprises a first pipe body, a second pipe body and a third pipe body, the first pipe body is communicated with the air inlet pipe, the second pipe body is communicated between the first pipe body and the second pipe body, and the third pipe body extends out of the drainage ball body; the threaded sleeve is fixed to the inner wall of the drainage ball body, and the pressure adjusting rod penetrates through the threaded sleeve and is in threaded connection with the threaded sleeve. The pressure adjusting rod is perpendicular to the second pipe body, one end of the pressure adjusting rod penetrates into the second pipe body and is in sliding connection with the second pipe body, and the other end of the pressure adjusting rod penetrates out of the drainage ball body. According to the negative pressure drainage device, the negative pressure can be conveniently adjusted, the drainage effect is improved, and the discomfort of a patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a negative pressure drainage device. Background Art

[0002] In recent years, the incidence rate of thyroid cancer has been increasing year by year. An important reason for the increase in the incidence rate of thyroid cancer is that with the improvement of diagnosis and treatment technologies, especially the inclusion of high-resolution color ultrasound in clinical routine physical examinations, it is conducive to early detection of more patients with subclinical stage thyroid cancer. The first choice for the treatment of thyroid cancer is surgery. After surgery, drainage is required in the neck to reduce postoperative bleeding, ensure a clean surgical area, prevent the formation of hematomas, promote the regression of postoperative edema, accelerate postoperative recovery, prevent the formation of postoperative fluid accumulation, ensure a tight fit of the surgical area, help reduce the risk of postoperative infection, and ensure wound healing.

[0003] In recent years, negative pressure drainage technology has been gradually applied to the drainage after neck surgery. However, in the prior art, the pressure of the drainage device is not easy to adjust, which affects the drainage effect. Summary of the Utility Model

[0004] An object of the utility model is to provide a negative pressure drainage device, which is convenient for adjusting the negative pressure, improves the drainage effect, and reduces the discomfort of patients.

[0005] A negative pressure drainage device provided by the present application adopts the following technical solutions:

[0006] The negative pressure drainage device of the embodiment of the utility model includes:

[0007] A drainage ball main body, a drainage tube is arranged at the top of the drainage ball main body, the drainage tube extends into the drainage ball main body, a liquid outlet tube is arranged at the bottom of the drainage ball main body, and one end of the liquid outlet tube extends into the drainage ball main body;

[0008] A negative pressure pump, the negative pressure pump is arranged in the drainage ball, an air inlet end of the negative pressure pump is connected with an air inlet tube, the air inlet tube is communicated with the inside of the drainage ball main body, an air outlet end of the negative pressure pump is connected with an air outlet tube, the air outlet tube extends out of the drainage ball main body and is communicated with the atmosphere, and a pressure relief valve is arranged on the air outlet tube;

[0009] Pressure regulating assembly, the pressure regulating assembly includes a supplementary air pipe, a threaded sleeve, and a pressure regulating rod. The supplementary air pipe is in a "Z" shape. The supplementary air pipe includes a first pipe body, a second pipe body, and a third pipe body that are integrally formed in sequence. The first pipe body is communicated with the intake pipe. The second pipe body is communicated between the first pipe body and the second pipe body. The third pipe body is located below the second pipe body and the third pipe body extends out of the drainage ball main body. The threaded sleeve is fixed on the inner wall of the drainage ball main body. The pressure regulating rod passes through the threaded sleeve and is threadedly connected with the threaded sleeve. The pressure regulating rod is perpendicular to the second pipe body. One end of the pressure regulating rod penetrates into the second pipe body and is slidably connected with the second pipe body. The other end of the pressure regulating rod penetrates out of the drainage ball main body.

[0010] Preferably, a pressure gauge is provided on the third pipe body.

[0011] Preferably, an annular auxiliary wall body is provided on the inner peripheral wall of the second pipe body. The auxiliary wall body is located at the pressure regulating rod. A circulation hole for gas to pass through is opened in the center of the auxiliary wall body. The cross-section of the circulation hole is square. One end of the pressure regulating rod penetrating into the second pipe body is rotatably connected with a square rod. A square hole for the square rod to penetrate out is opened on the outer wall of the second pipe body. The square hole is communicated with the circulation hole. The outer peripheral wall of the square rod fits with the inner peripheral wall of the square hole.

[0012] A receiving groove for the pressure regulating rod to penetrate into is opened on the square rod. A limiting block is provided on the outer peripheral wall of the pressure regulating rod. The limiting blocks are symmetrically arranged along the radial direction of the pressure regulating rod. A limiting ring groove for the limiting block to rotate is provided on the inner peripheral wall of the receiving groove.

[0013] Preferably, one end of the pressure regulating rod penetrating out of the drainage ball main body is coaxially connected with an operation ring. The outer diameter of the operation ring is larger than the outer diameter of the pressure regulating rod.

[0014] Preferably, positioning rods are provided on the outer peripheral wall of the operation ring. A plurality of positioning rods are equidistantly arranged along the circumferential direction of the operation ring. Positioning marks are provided on the outer wall of the drainage ball main body. The positioning rods and the positioning marks are used in cooperation.

[0015] Preferably, five positioning rods are provided. The five positioning rods are sequentially marked with "0 gear", "1 gear", "2 gear", "3 gear", and "4 gear".

[0016] When the positioning rod marked with "0 gear" is located at the positioning mark, the square rod is located outside the circulation hole.

[0017] When the positioning rod marked with "1 gear" is located at the positioning mark, the square rod blocks one-fourth of the volume for gas to flow through at the circulation hole.

[0018] When the positioning rod marked with "second gear" is located at the positioning mark, the square rod blocks two - quarters of the volume for gas flow at the flow - through hole.

[0019] When the positioning rod marked with "third gear" is located at the positioning mark, the square rod blocks three - quarters of the volume for gas flow at the flow - through hole.

[0020] When the positioning rod marked with "fourth gear" is located at the positioning mark, the square rod completely blocks the flow - through hole.

[0021] Preferably, LED lamp beads are arranged on the main body of the drainage ball. A plurality of LED lamp beads are arranged at equal intervals along the circumferential direction of the main body of the drainage ball. The LED lamp beads are electrically connected to a remote controller, and the remote controller is used to simultaneously control the opening and closing and brightness adjustment of all the LED lamp beads.

[0022] Preferably, a label is arranged at the top end of the main body of the drainage ball, and patient information, date, and time are recorded on the label.

[0023] Preferably, scale lines are arranged on the main body of the drainage ball.

[0024] Preferably, one end of the liquid outlet pipe far from the main body of the drainage ball is connected to a liquid storage bag, and pipe clamps are arranged on both the drainage pipe and the liquid outlet pipe.

[0025] In summary, the present application includes the following beneficial technical effects:

[0026] According to the negative - pressure drainage device of the embodiment of the present utility model, by adopting the above - mentioned technical solution, when the pressure - regulating rod is rotated, under the cooperative action of the threaded sleeve, the pressure - regulating rod drives the square rod to slide along the length direction of the square rod, so as to change the flow - through area of the flow - through hole, thereby changing the amount of atmospheric air entering the negative - pressure pump. The gas in the main body of the drainage ball will be simultaneously sucked into the negative - pressure pump. Since the amount of gas sucked by the negative - pressure pump per unit time is constant, the amount of gas in the main body of the drainage ball sucked into the negative - pressure pump is changed. Thus, the pressure - regulating rod can be rotated according to actual needs to adjust the negative - pressure, improve the drainage effect, and reduce the discomfort of the patient.

[0027] Other features and advantages of the present utility model will become clear through the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0029] Figure 1It is a schematic diagram of the overall structure of the negative pressure drainage device in the embodiment of the present application.

[0030] Figure 2 It is a schematic cross-sectional structure diagram for showing the internal structure of the drainage ball main body in the embodiment of the present application.

[0031] Figure 3 is Figure 2 The enlarged schematic diagram of part A in

[0032] Figure 4 It is a schematic cross-sectional structure diagram for showing the second pipe body, the pressure regulating rod and the square rod in the embodiment of the present application.

[0033] Reference numerals:

[0034] 1. Drainage ball main body; 11. Drainage pipe; 12. Liquid outlet pipe; 2. Liquid storage bag; 3. Pipe clamp; 4. Label; 5. Scale line; 6. Negative pressure pump; 61. Intake pipe; 62. Exhaust pipe; 621. Pressure relief valve; 7. Pressure regulating assembly; 71. Supplementary air pipe; 711. First pipe body; 712. Second pipe body; 7121. Square hole; 713. Third pipe body; 7131. Pressure gauge; 72. Threaded sleeve; 73. Pressure regulating rod; 731. Limit block; 74. Auxiliary wall body; 741. Flow hole; 75. Square rod; 751. Accommodating groove; 752. Limit ring groove; 8. Operation ring; 81. Positioning rod; 82. Positioning mark; 9. LED lamp bead. Detailed implementation manners

[0035] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation on the present invention and its application or use.

[0037] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the description.

[0038] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] In the description and claims of the present utility model, features related to the terms "first" and "second" may explicitly or implicitly include one or more such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0041] In the description of the present utility model, it should be understood that for terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] The following specifically describes the negative pressure drainage device according to the embodiments of the present utility model with reference to the drawings.

[0044] Referring to Figures 1-4 , the negative pressure drainage device includes a drainage ball main body 1. A drainage tube 11 is provided at the top of the drainage ball main body 1. The drainage tube 11 extends into the drainage ball main body 1 and is hermetically connected to the drainage ball main body 1. A liquid outlet tube 12 is provided at the bottom of the drainage ball main body 1. One end of the liquid outlet tube 12 extends into the drainage ball main body 1 and is hermetically connected to the drainage ball main body 1.

[0045] A liquid storage bag 2 is connected to the end of the liquid outlet tube 12 away from the drainage ball main body 1. Tube clamps 3 are provided on both the drainage tube 11 and the liquid outlet tube 12. Opening the tube clamp 3 on the drainage tube 11 allows the drainage tube 11 to flow, closing the tube clamp 3 on the drainage tube 11 stops the drainage tube 11 from flowing. Opening the tube clamp 3 on the liquid outlet tube 12 allows the drainage tube 11 to flow, closing the tube clamp 3 on the liquid outlet tube 12 stops the drainage tube 11 from flowing.

[0046] A label 4 is provided at the top of the drainage ball main body 1, and patient information, period, and time are recorded on the label 4.

[0047] Scale lines 5 are provided on the drainage ball main body 1, which is convenient for medical staff to understand the amount of accumulated fluid in the drainage ball main body 1. When the amount of accumulated fluid reaches a certain value, the pipe clamp 3 on the liquid outlet pipe 12 is opened to allow the accumulated fluid to flow into the liquid storage bag 2. A drain pipe 21 is provided below the liquid storage bag 2, and a sealing plug 22 is in interference fit at one end of the drain pipe 21 away from the liquid storage bag 2. After the sealing plug 22 is opened, it is convenient to drain the accumulated fluid.

[0048] A negative pressure pump 6 is provided inside the drainage ball main body 1. The air inlet end of the negative pressure pump 6 is connected to an air inlet pipe 61, and the air inlet pipe 61 communicates with the inside of the drainage ball main body 1. The air outlet end of the negative pressure pump 6 is connected to an air outlet pipe 62, and the air outlet pipe 62 extends out of the drainage ball main body 1 and communicates with the atmosphere. A pressure relief valve 621 is provided on the air outlet pipe 62. Opening the pressure relief valve 621 can restore the drainage ball main body 1 to its original state.

[0049] A pressure regulating assembly 7 is provided inside the drainage ball main body 1. The pressure regulating assembly 7 includes a supplementary air pipe 71, a threaded sleeve 72, and a pressure regulating rod 73. The supplementary air pipe 71 is in a "Z" shape and includes a first pipe body 711, a second pipe body 712, and a third pipe body 713 that are integrally formed in sequence. The first pipe body 711 communicates with the air inlet pipe 61, the second pipe body 712 is connected between the first pipe body 711 and the second pipe body 712, and the third pipe body 713 is located below the second pipe body 712 and the third pipe body 713 extends out of the drainage ball main body 1.

[0050] A pressure gauge 7131 is provided on the third pipe body 713, and the pressure gauge 7131 is used to detect and display the air pressure value of the third pipe body 713, which is convenient for medical staff to understand the negative pressure of the negative pressure pump 6 on the drainage ball main body 1.

[0051] The threaded sleeve 72 is fixed to the inner wall of the drainage ball main body 1. An internal thread is provided on the inner peripheral wall of the threaded sleeve 72, and an external thread section that is used in cooperation with the internal thread is provided on the pressure regulating rod 73. The pressure regulating rod 73 passes through the threaded sleeve 72 and is threadedly connected to the threaded sleeve 72 through the external thread section. The pressure regulating rod 73 is perpendicular to the second pipe body 712. One end of the pressure regulating rod 73 penetrates into the second pipe body 712 and is slidably connected to the second pipe body 712, and the other end of the pressure regulating rod 73 extends out of the drainage ball main body 1.

[0052] An annular auxiliary wall body 74 is provided on the inner peripheral wall of the second pipe body 712. The auxiliary wall body 74 is located at the pressure regulating rod 73. A circulation hole 741 for gas to pass through is opened at the center of the auxiliary wall body 74. The cross-section of the circulation hole 741 is square. One end of the pressure regulating rod 73 passing through the second pipe body 712 is rotatably connected with a square rod 75. A square hole 7121 for the square rod 75 to pass through is opened on the outer wall of the second pipe body 712. The square hole 7121 is communicated with the circulation hole 741. The outer peripheral wall of the square rod 75 is attached to the inner peripheral wall of the square hole 7121.

[0053] A receiving groove 751 for the pressure regulating rod 73 to pass through is opened on the square rod 75. A limiting block 731 is provided on the outer peripheral wall of the pressure regulating rod 73. The limiting blocks 731 are symmetrically arranged along the radial direction of the pressure regulating rod 73. A limiting ring groove 752 for the limiting block 731 to rotate is provided on the inner peripheral wall of the receiving groove 751.

[0054] When the pressure regulating rod 73 is rotated, under the cooperative action of the threaded sleeve 72, the pressure regulating rod 73 drives the square rod 75 to slide along the length direction of the square rod 75, so as to change the circulation area of the circulation hole 741, thereby changing the amount of atmospheric air entering the negative pressure pump 6. The gas in the drainage ball main body 1 will be simultaneously sucked into the negative pressure pump 6. The amount of gas sucked by the negative pressure pump 6 per unit time is constant. Furthermore, the amount of gas in the drainage ball main body 1 sucked into the negative pressure pump 6 is changed. Thus, the pressure regulating rod 73 can be rotated according to actual needs to adjust the negative pressure, improve the drainage effect, and reduce the discomfort of the patient.

[0055] One end of the pressure regulating rod 73 passing through the outside of the drainage ball main body 1 is coaxially connected with an operation ring 8. The outer diameter of the operation ring 8 is larger than the outer diameter of the pressure regulating rod 73. It is more convenient to operate the pressure regulating rod 73 through the operation ring 8.

[0056] Positioning rods 81 are provided on the outer peripheral wall of the operation ring 8. A plurality of positioning rods 81 are equidistantly arranged along the circumferential direction of the operation ring 8. Positioning marks 82 are provided on the outer wall of the drainage ball main body 1. The positioning rods 81 and the positioning marks 82 are used in cooperation.

[0057] Five positioning rods 81 are provided. The five positioning rods 81 are sequentially marked with "gear 0", "gear 1", "gear 2", "gear 3", and "gear 4".

[0058] When the positioning rod 81 marked with "gear 0" is located at the positioning mark 82, the square rod 75 is located outside the circulation hole 741. At this time, the least amount of gas in the drainage ball main body 1 enters the negative pressure pump 6.

[0059] When the positioning rod 81 marked with "gear 1" is located at the positioning mark 82, the square rod 75 blocks one-fourth of the volume for gas to circulate at the circulation hole 741. At this time, the amount of gas in the drainage ball main body 1 entering the negative pressure pump 6 increases.

[0060] When the positioning rod 81 marked with "second gear" is located at the positioning mark 82, the square rod 75 blocks two - quarters of the volume for gas flow at the flow - through hole 741. At this time, the gas entering the negative - pressure pump 6 from the drainage - ball main body 1 further increases.

[0061] When the positioning rod 81 marked with "third gear" is located at the positioning mark 82, the square rod 75 blocks three - quarters of the volume for gas flow at the flow - through hole 741. At this time, the gas entering the negative - pressure pump 6 from the drainage - ball main body 1 further increases.

[0062] When the positioning rod 81 marked with "fourth gear" is located at the positioning mark 82, the square rod 75 completely blocks the flow - through hole 741. At this time, the gas entering the negative - pressure pump 6 from the drainage - ball main body 1 reaches the maximum.

[0063] By using the positioning rod 81 and the positioning mark 82 in cooperation, in the case where the patient is not convenient to adjust by himself / herself, it is convenient for medical staff to adjust the negative pressure according to the pressure gauge 7131 to reduce the discomfort of the patient.

[0064] The drainage - ball main body 1 is provided with LED lamp beads 9. A plurality of LED lamp beads 9 are arranged equidistantly along the circumferential direction of the drainage - ball main body 1. The LED lamp beads 9 are electrically connected to a remote controller, and the remote controller is used to control the opening and closing and brightness adjustment of all the LED lamp beads 9 simultaneously, which is convenient for observing the position and state of the negative - pressure drainage device at night.

[0065] The implementation principle of a negative - pressure drainage device in an embodiment of the present application is as follows:

[0066] When the negative - pressure needs to be adjusted, rotate the pressure - regulating rod 73. Under the cooperative action of the threaded sleeve 72, the pressure - regulating rod 73 drives the square rod 75 to slide along the length direction of the square rod 75 to change the flow - through area of the flow - through hole 741, so as to change the amount of atmospheric air entering the negative - pressure pump 6. The gas in the drainage - ball main body 1 will be simultaneously sucked into the negative - pressure pump 6, and the amount of gas sucked by the negative - pressure pump 6 per unit time is constant. Furthermore, the amount of gas sucked from the drainage - ball main body 1 into the negative - pressure pump 6 is changed. Thus, the pressure - regulating rod 73 can be rotated according to actual needs to adjust the negative - pressure, improve the drainage effect, and reduce the discomfort of the patient.

[0067] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A negative pressure drainage device, characterized in that: include: A drainage ball body (1), wherein a drainage tube (11) is arranged at the top of the drainage ball body (1), and the drainage tube (11) extends into the drainage ball body (1); and a liquid outlet tube (12) is arranged at the bottom of the drainage ball body (1), and one end of the liquid outlet tube (12) extends into the drainage ball body (1); A negative pressure pump (6), the negative pressure pump (6) being arranged in the drainage ball body (1), the air inlet end of the negative pressure pump (6) being connected to an air inlet pipe (61), the air inlet pipe (61) being in communication with the interior of the drainage ball body (1), the air outlet end of the negative pressure pump (6) being connected to an air outlet pipe (62), the air outlet pipe (62) extending out of the drainage ball body (1) and in communication with the atmosphere, the air outlet pipe (62) being provided with a pressure relief valve (621); A pressure regulating assembly (7), the pressure regulating assembly (7) comprising an air supply pipe (71), a threaded sleeve (72), and a pressure regulating rod (73); the air supply pipe (71) is in a "Z" shape; the air supply pipe (71) comprises a first tube body (711), a second tube body (712), and a third tube body (713) which are integrally formed in sequence; the first tube body (711) is connected to the air inlet pipe (61); the second tube body (712) is connected between the first tube body (711) and the second tube body (712); the third tube body (713) is located between the second tube body (711) and the second tube body (712); 12) and the third tube body (713) extends out of the drainage ball body (1); the threaded sleeve (72) is fixed on the inner wall of the drainage ball body (1), and the pressure regulating rod (73) passes through the threaded sleeve (72) and is threadedly connected to the threaded sleeve (72); the pressure regulating rod (73) is perpendicular to the second tube body (712), one end of the pressure regulating rod (73) passes through the second tube body (712) and is slidably connected to the second tube body (712), and the other end of the pressure regulating rod (73) passes out of the drainage ball body (1).

2. The negative pressure drainage device according to claim 1, characterized in that: The third tube body (713) is provided with a pressure gauge (7131).

3. The negative pressure drainage device according to claim 1, characterized in that: An annular auxiliary wall body (74) is provided on the inner circumferential wall of the second tube body (712), the auxiliary wall body (74) is located at the pressure regulating rod (73), a flow hole (741) for gas to pass through is provided at the center of the auxiliary wall body (74), the cross section of the flow hole (741) is square, one end of the pressure regulating rod (73) that penetrates into the second tube body (712) is rotatably connected to a square rod (75), a square hole (7121) for the square rod (75) to pass through is provided on the outer wall of the second tube body (712), the square hole (7121) is communicated with the flow hole (741), and the outer circumferential wall of the square rod (75) is in contact with the inner circumferential wall of the square hole (7121); The square rod (75) is provided with a receiving groove (751) for the pressure regulating rod (73) to penetrate, and a limiting block (731) is arranged on the outer peripheral wall of the pressure regulating rod (73), and the limiting block (731) is symmetrically arranged along the radial direction of the pressure regulating rod (73), and a limiting ring groove (752) for the limiting block (731) to rotate is arranged on the inner peripheral wall of the receiving groove (751).

4. The negative pressure drainage device according to claim 3, characterized in that: One end of the pressure regulating rod (73) that passes through the drainage ball body (1) is coaxially connected to an operating ring (8), and the outer diameter of the operating ring (8) is larger than the outer diameter of the pressure regulating rod (73).

5. The negative pressure drainage device according to claim 4, characterized in that: A positioning rod (81) is arranged on the outer peripheral wall of the operating ring (8), and a plurality of the positioning rods (81) are arranged at equal distances along the circumference of the operating ring (8). A positioning mark (82) is arranged on the outer wall of the drainage ball body (1), and the positioning rod (81) is used in conjunction with the positioning mark (82).

6. The negative pressure drainage device according to claim 5, characterized in that: Five positioning rods (81) are provided, and the five positioning rods (81) are marked with "0 gear", "1 gear", "2 gear", "3 gear", and "4 gear" in sequence; When the positioning rod (81) marked with "0 gear" is located at the positioning mark (82), the square rod (75) is located outside the flow hole (741); When the positioning rod (81) marked with "1st gear" is located at the positioning mark (82), the square rod (75) blocks one quarter of the volume of the flow hole (741) for gas flow; When the positioning rod (81) marked with "2nd gear" is located at the positioning mark (82), the square rod (75) blocks two quarters of the volume of the flow hole (741) for gas flow; When the positioning rod (81) marked with "3rd gear" is located at the positioning mark (82), the square rod (75) blocks three quarters of the volume of the flow hole (741) for gas flow; When the positioning rod (81) marked with "4th gear" is located at the positioning mark (82), the square rod (75) completely blocks the flow hole (741).

7. The negative pressure drainage device according to claim 1, characterized in that: The drainage ball body (1) is provided with LED lamp beads (9), a plurality of LED lamp beads (9) are arranged equidistantly along the circumference of the drainage ball body (1), and the LED lamp beads (9) are electrically connected to a remote controller, which is used to simultaneously control the on / off and brightness adjustment of all the LED lamp beads (9).

8. The negative pressure drainage device according to claim 1, characterized in that: A label (4) is provided at the top of the drainage ball body (1), and the label (4) is used to record patient information, period, and time.

9. The negative pressure drainage device according to claim 1, characterized in that: The drainage ball body (1) is provided with scale lines (5).

10. The negative pressure drainage device according to claim 1, characterized in that: One end of the liquid outlet tube (12) away from the drainage ball body (1) is connected to a liquid storage bag (2), and both the drainage tube (11) and the liquid outlet tube (12) are provided with a tube clamp (3).

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