Multifunctional negative pressure drainage ball

Abstract

The application relates to the technical field of drainage devices, and a multifunctional negative pressure drainage ball, which comprises a negative pressure ball body, liquid inlet and liquid outlet arranged at two ends of the negative pressure ball body, a liquid inlet pipeline and a pressure adjusting device, one end of the liquid inlet pipeline is connected with the liquid inlet through a three-way pipe, a pressure gauge is connected to the three-way pipe, the pressure adjusting device is connected to the liquid inlet pipeline, the pressure adjusting device comprises a scale cylinder and a piston rod, the piston rod is slidably connected with the scale cylinder, one end of the scale cylinder away from the piston rod is connected with the liquid inlet pipeline and a cleaning liquid container through a connecting pipe and a cleaning pipe, first and second valves are respectively arranged on the connecting pipe and the cleaning pipe, and third and fourth valves are respectively arranged at two ends of the connecting position of the liquid inlet pipeline and the connecting pipe. The application can effectively improve the stability and smoothness of the drainage operation.

Description

Technical Field

[0001] This application relates to the field of drainage device technology, and in particular to a multifunctional negative pressure drainage ball. Background Technology

[0002] Negative pressure balloons have functions such as draining blood from surgical sites, estimating bleeding volume, venting and draining fluid, preventing infection, and promoting wound healing. They are widely used in postoperative patients in orthopedics, neurosurgery, gastrointestinal surgery, thoracic surgery, and other fields.

[0003] A negative pressure bulb consists of a cavity for holding the liquid, an end cap for sealing the cavity, and an outer sleeve that works in conjunction with the end cap to seal the cavity. Since the negative pressure value of a negative pressure bulb primarily relies on the deformation recovery force of the outer sleeve, the greater the deformation of the outer sleeve, the higher the negative pressure value the bulb can provide. Therefore, in clinical use, the negative pressure value provided by the bulb is generally controlled manually by the doctor, which heavily relies on the doctor's experience and skill. It demands a high level of expertise from the doctor, as inaccurate control of the negative pressure can lead to insufficient drainage or blockage of the bulb's drainage tube, especially when the drainage material is viscous or separated. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, this application provides a multifunctional negative pressure drainage ball.

[0005] The multifunctional negative pressure drainage ball provided in this application adopts the following technical solution:

[0006] A multifunctional negative pressure drainage ball includes a negative pressure ball body with an inlet and an outlet at both ends, an inlet pipe and a pressure regulating device. One end of the inlet pipe is connected to the inlet via a T-junction, and a pressure gauge is connected to the T-junction. The pressure regulating device is connected to the inlet pipe and includes a graduated cylinder and a piston rod, wherein the piston rod is slidably connected to the graduated cylinder. The end of the graduated cylinder away from the piston rod is connected to the inlet pipe and a cleaning fluid container via a connecting pipe and a cleaning pipe, respectively. A first valve and a second valve are installed on the connecting pipe and the cleaning pipe, respectively. A third valve and a fourth valve are installed at the connection between the inlet pipe and the connecting pipe, respectively.

[0007] By adopting the above technical solution, when using this multifunctional negative pressure drainage ball, first open the first valve and the fourth valve, close the second valve and the third valve, and then operate the pressure regulating device. The pressure in the negative pressure ball body and the inlet pipe is adjusted by sliding the piston rod in the graduated cylinder. At this time, the pressure gauge on the three-way pipe can monitor the pressure in real time, thereby improving the accuracy of negative pressure suction in the inlet pipe. Then close the first and second valves, and open the third and fourth valves. Place the free end of the inlet pipe into the drainage area to perform negative pressure suction of the negative pressure drainage ball. The drainage fluid enters the negative pressure ball body through the inlet pipe and the three-way pipe. The pressure gauge on the three-way pipe monitors the pressure in real time and can provide feedback on whether the inlet pipe is properly suctioning the drainage fluid. When the drainage material blocks the inlet of the inlet pipe, it is necessary to clean the inlet pipe. At this time, open the second valve, and use the negative pressure in the graduated cylinder to draw the cleaning fluid from the cleaning fluid container into the graduated cylinder. Then close the second and fourth valves, open the first valve, and operate the piston rod to squeeze the cleaning fluid out of the graduated cylinder. The cleaning fluid enters the inlet pipe through the connecting pipe to perform reverse flushing of the inlet pipe, making it easier to unclog the inlet pipe.

[0008] Preferably, a pipe reinforcement sleeve is fitted at the connection between the liquid inlet pipe and the connecting pipe.

[0009] Preferably, the connecting pipe is inclined toward the negative pressure ball, and the angle between the connecting pipe and the liquid inlet pipe is 10-30°.

[0010] By adopting the above technical solution, the pipe reinforcement sleeve fitted at the connection between the inlet pipe and the connecting pipe greatly enhances the stability of the pipe connection. During the drainage process, it effectively prevents pipe loosening and disconnection caused by factors such as liquid flow impact and external pulling, ensuring the sealing and reliability of the entire drainage system. The connecting pipe is inclined towards the negative pressure ball and forms a 10-30° angle with the inlet pipe. This design improves the continuity of the cleaning fluid flowing from the graduated cylinder to the end of the inlet pipe, reduces the buffering of the cleaning fluid at the connection between the connecting pipe and the inlet pipe, and significantly improves the stability and smoothness of unblocking the inlet pipe.

[0011] Preferably, the negative pressure ball body and the three-way pipe are connected by a connector. One end of the connector is connected to the liquid inlet of the negative pressure ball body by a sealing ring, and the other end of the connector is connected to the threaded pipe at the end of the three-way pipe by a threaded ring.

[0012] By adopting the above technical solution, when assembling this multifunctional negative pressure drainage ball, firstly, the sealing ring at one end of the connector is tightly fitted onto the liquid inlet of the negative pressure ball body. The excellent sealing performance of the sealing ring ensures that there will be no leakage at the connection. Next, the threaded ring at the other end of the connector is aligned with the threaded pipe at the end of the tee tube, and by rotating the threaded ring clockwise, a tight threaded connection is achieved with the threaded pipe. During drainage, the liquid flows smoothly from the liquid inlet pipe through the tee tube, through the securely connected connector, and into the negative pressure ball body. This connection method, both in terms of convenient operation during installation and the guarantee of connection stability and sealing during drainage, lays a solid foundation for the efficient operation of the entire negative pressure drainage system.

[0013] Preferably, the piston rod is located at one end inside the graduated cylinder, where the piston abuts against the inner wall of the graduated cylinder, and the other end passes through the mounting plate at the end of the graduated cylinder. A gap is provided between the mounting plate and the side wall of the piston rod. Several sets of annular locking grooves are spaced apart on the piston rod, and a locking mechanism that cooperates with the annular locking grooves is installed on the mounting plate.

[0014] Preferably, the surface of the mounting plate is provided with a sliding groove, wherein the opening of the sliding groove is provided with limiting stops on both sides to restrict the locking mechanism within the sliding groove, the locking mechanism includes a locking block and a first elastic member located at the end of the locking block away from the piston rod, the other end of the first elastic member is fixedly connected to the end of the sliding groove, the bottom of the locking block is also provided with a positioning groove, and the bottom of the sliding groove is provided with a positioning mechanism adapted to the positioning groove.

[0015] Preferably, the positioning mechanism is located in the longitudinal groove at the bottom of the slide, including a positioning block slidably installed in the longitudinal groove and a second elastic member at the bottom of the positioning block, wherein the top of the positioning block has a right-angled triangular structure, with the inclined surface facing the piston rod side and the right-angled side facing the elastic member side.

[0016] Preferably, the bottom of the positioning block is also connected to a tie rod, which passes through the bottom of the longitudinal groove and has a pull ring installed at its free end.

[0017] By adopting the above technical solution, when operating the pressure regulating device, pushing the piston rod causes the piston at one end inside the graduated cylinder to slide while abutting against the inner wall of the graduated cylinder, thereby adjusting the pressure. When the pressure in the negative pressure body and the inlet pipe is adjusted to the corresponding negative pressure value, the piston rod position needs to be fixed, and the locking mechanism on the mounting plate comes into play. Under the elastic force of the first elastic element, the locking block moves towards the piston rod until it is embedded in the corresponding annular locking groove on the piston rod to achieve locking. When it is necessary to adjust the movable rod, the locking block is unlocked from the annular locking groove by flicking the locking block with a finger, and moves along the slide groove on the mounting plate towards the end away from the piston rod, pressing the first elastic element until the positioning groove at the bottom of the locking block cooperates with the positioning mechanism, and works in conjunction with the limiting stop strip on the slide groove to fix the locking block on the slide groove. Specifically, in the positioning mechanism, the positioning block, supported by the second elastic element, slides towards the bottom of the longitudinal groove when the inclined surface of the top right-angled triangular structure is pressed by the locking block. When the positioning groove moves to align with the positioning block, the positioning block springs into the positioning groove under the action of the second elastic element, thus fixing the locking block. To fix the position of the piston rod after adjustment again, pull the pull ring on the pull rod, causing the positioning block to move downwards and disengage from the positioning groove. At this time, the locking block moves in the slide groove under the elastic force of the first elastic element, thereby engaging and locking with the annular locking groove on the piston rod.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. By setting up a pressure regulating device with a graduated cylinder and piston rod, doctors can intuitively and accurately adjust the infusion pressure according to actual needs, getting rid of the limitations of relying solely on manual control in the past, reducing excessive dependence on doctors' experience and operational skills, ensuring that the negative pressure value can be accurately controlled, and greatly improving the stability of drainage operations.

[0020] 2. This application effectively addresses the risk of blockage, which is prone to occur when the drainage material is viscous or separated. In this application, a pipe reinforcement sleeve is installed at the connection between the inlet pipe and the connecting pipe to enhance the connection stability and prevent pipe loosening due to blockage. Furthermore, a cleaning pipe for connecting the cleaning fluid container is provided on the graduated cylinder, allowing cleaning to be initiated when necessary. Simultaneously, the connecting pipe is inclined towards the negative pressure bulb and forms a 10-30° angle with the inlet pipe. This design improves the continuity of the cleaning fluid flow from the graduated cylinder to the end of the inlet pipe, reduces buffering of the cleaning fluid at the connection between the connecting pipe and the inlet pipe, and significantly enhances the stability and smoothness of unblocking clogged inlet pipes.

[0021] 3. This application connects the negative pressure ball body and the three-way pipe through a specific connector. One end is sealed with a sealing ring, and the other end is connected to the threaded pipe with a threaded ring. This connection method not only ensures the sealing of the connection and prevents liquid leakage, but also makes the installation and disassembly operation convenient, and provides a reliable guarantee for the stable operation of the system during the drainage process.

[0022] 4. In this application, the piston at one end of the piston rod of the pressure regulating device is in close contact with the inner wall of the scale cylinder to ensure the accuracy of pressure regulation; the other end passes through the mounting plate. By setting a locking mechanism that cooperates with the annular locking groove of the piston rod on the mounting plate, as well as a matching positioning mechanism, the piston rod in the adjusted position can be easily locked to ensure the stability of the pressure setting and avoid pressure changes due to accidental contact. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a multifunctional negative pressure drainage ball;

[0024] Figure 2 This is a schematic diagram of the structure of a multifunctional negative pressure drainage ball for removing the negative pressure ball body;

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0026] Explanation of reference numerals in the attached diagram: 1. Negative pressure ball body; 11. Inlet; 12. Outlet; 13. Connector; 131. Sealing ring; 132. Threaded ring; 2. Inlet pipe; 21. Tee; 211. Threaded pipe; 22. Pressure gauge; 23. Pipe reinforcement sleeve; 24. Third valve; 25. Fourth valve; 3. Pressure regulating device; 31. Scale cylinder; 311. Connecting pipe; 312. Cleaning pipe; 313. First valve; 314. Second valve; 32. Piston rod; 321. Piston; 322. Annular locking groove; 33. Mounting plate; 331. Slide groove; 332. Limiting stop bar; 34. Locking mechanism; 341. Locking block; 342. First elastic element; 343. Positioning groove; 35. Positioning mechanism; 351. Longitudinal groove; 352. Positioning block; 353. Second elastic element; 354. Pull rod; 355. Pull ring; 4. Cleaning fluid container. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a multifunctional negative pressure drainage ball.

[0029] Reference Figure 1 , Figure 2 and Figure 3A multifunctional negative pressure drainage ball includes a negative pressure ball body 1, with an inlet 11 and an outlet 12 at both ends of the body 1. It also includes an inlet pipe 2 and a pressure regulating device 3. One end of the inlet pipe 2 is connected to the inlet 11 via a three-way pipe 21, with a pressure gauge 22 connected to the three-way pipe 21. The pressure regulating device 3 is connected to the inlet pipe 2, and includes a graduated cylinder 31 and a piston rod 32. The piston rod 32 is slidably connected to the graduated cylinder 31. The end of the graduated cylinder 31 away from the piston rod 32 is connected to the inlet pipe 2 and a cleaning fluid container 4 via a connecting pipe 311 and a cleaning pipe 312, respectively. A first valve 313 and a second valve 314 are installed on the connecting pipe 311 and the cleaning pipe 312, respectively. A third valve 24 and a fourth valve 25 are installed at both ends of the connection between the inlet pipe 2 and the connecting pipe 311. When using this multifunctional negative pressure drainage ball, first open the first valve 313 and the fourth valve 25, close the second valve 314 and the third valve 24, and then operate the pressure regulating device 3. The pressure in the negative pressure ball body 1 and the liquid inlet pipe 2 is adjusted by sliding the piston rod 32 in the scale cylinder 31. At this time, the pressure gauge 22 on the three-way pipe 21 can monitor the pressure in real time, thereby improving the accuracy of negative pressure suction in the liquid inlet pipe 2. Then close the first valve 313 and the second valve 314, open the third valve 24 and the fourth valve 25, and place the free end of the inlet pipe 2 into the drainage area to perform negative pressure suction of the negative pressure drainage ball. The drainage fluid enters the negative pressure ball body 1 through the inlet pipe 2, through the three-way pipe 21 from the inlet 11. The pressure gauge 22 on the three-way pipe 21 monitors the pressure in real time and can provide feedback on whether the inlet pipe 2 is performing drainage fluid suction normally. When the drainage material blocks the inlet of the inlet pipe 2, it is necessary to clean the inlet pipe 2. At this time, open the second valve 314, and use the negative pressure in the graduated cylinder 31 to draw the cleaning fluid in the cleaning fluid container 4 into the graduated cylinder 31. Then close the second valve 314 and the fourth valve 25, open the first valve 313, and operate the piston rod 32 to squeeze the cleaning fluid out of the graduated cylinder 31. The cleaning fluid enters the inlet pipe 2 through the connecting pipe 311 to perform reverse flushing of the inlet pipe 2, making it easier to unclog the inlet pipe 2.

[0030] Reference Figure 1 and Figure 2A pipe reinforcement sleeve 23 is fitted at the connection between the inlet pipe 2 and the connecting pipe 311. The connecting pipe 311 is inclined towards the negative pressure ball, and the angle between the connecting pipe 311 and the inlet pipe 2 is 30°. The pipe reinforcement sleeve 23 fitted at the connection between the inlet pipe 2 and the connecting pipe 311 greatly enhances the stability of the pipe connection. During the drainage process, it can effectively prevent the pipe from loosening or disengaging due to factors such as liquid flow impact and external pulling, ensuring the sealing and reliability of the entire drainage system. The inclination of the connecting pipe 311 towards the negative pressure ball and the 30° angle with the inlet pipe 2 improves the continuity of the cleaning fluid flowing from the graduated cylinder 31 to the end of the inlet pipe 2, reduces the buffering of the cleaning fluid at the connection between the connecting pipe 311 and the inlet pipe 2, and significantly improves the stability and smoothness of unblocking the clogged inlet pipe 2.

[0031] Reference Figure 1 and Figure 2 The negative pressure ball body 1 and the three-way pipe 21 are connected by a connector 13. One end of the connector 13 is connected to the liquid inlet 11 of the negative pressure ball body 1 via a sealing ring 131, and the other end of the connector 13 is threadedly connected to the threaded pipe 211 at the end of the three-way pipe 21 via a threaded ring 132. When assembling this multifunctional negative pressure drainage ball, first, the sealing ring 131 at one end of the connector 13 is tightly fitted onto the liquid inlet 11 of the negative pressure ball body 1. The good sealing performance of the sealing ring 131 ensures that there will be no leakage at the connection. Next, the threaded ring 132 at the other end of the connector 13 is aligned with the threaded pipe 211 at the end of the three-way pipe 21, and the threaded ring 132 is rotated clockwise to achieve a tight threaded connection with the threaded pipe 211. During drainage, the liquid flows smoothly from the liquid inlet pipe 2 through the three-way pipe 21 and through the securely connected connector 13 into the negative pressure ball body 1. This connection method, with its convenient operation during installation and its guarantee of connection stability and sealing during drainage, lays a solid foundation for the efficient operation of the entire negative pressure drainage system.

[0032] Reference Figure 1 , Figure 2 and Figure 3The piston rod 32 is located inside the scale cylinder 31. One end of the piston rod 32 abuts against the inner wall of the scale cylinder 31, and the other end passes through the mounting plate 33 at the end of the scale cylinder 31. There is a gap between the mounting plate 33 and the side wall of the piston rod 32. Several sets of annular locking grooves 322 are spaced apart on the piston rod 32. A locking mechanism 34 that cooperates with the annular locking grooves 322 is installed on the mounting plate 33. A sliding groove 331 is opened on the surface of the mounting plate 33. Limiting stops 332 that restrict the locking mechanism 34 within the sliding groove 331 are provided on both sides of the opening of the sliding groove 331. The locking mechanism 34 includes a locking block 341 and a first elastic member 342 located at the end of the locking block 341 away from the piston rod 32. The other end of the first elastic member 342 is fixedly connected to the end of the sliding groove 331. A positioning groove 343 is also opened at the bottom of the locking block 341. A positioning mechanism 35 that is adapted to the positioning groove 343 is provided at the bottom of the sliding groove 331. The positioning mechanism 35 is located within the longitudinal groove 351 at the bottom of the slide 331. It includes a positioning block 352 slidably mounted within the longitudinal groove 351 and a second elastic element 353 at the bottom of the positioning block 352. The top of the positioning block 352 has a right-angled triangular cross-section, with the inclined surface facing the piston rod 32 and the right-angled side facing the elastic element. A pull rod 354 is also connected to the bottom of the positioning block 352, passing through the bottom of the longitudinal groove 351, and a pull ring 355 is installed at the free end of the pull rod 354. When operating the pressure regulating device 3, the piston rod 32 is pushed, causing the piston 321 at one end inside the scale cylinder 31 to slide in contact with the inner wall of the scale cylinder 31, thereby adjusting the pressure. When the pressure in the negative pressure body and the inlet pipe 2 is adjusted to the corresponding negative pressure value, the position of the piston rod 32 needs to be fixed, and the locking mechanism 34 on the mounting plate 33 comes into play. Under the elastic force of the first elastic element 342, the locking block 341 moves towards the piston rod 32 until it is locked into the corresponding annular locking groove 322 on the piston rod 32. When it is necessary to adjust the movable rod, the locking block 341 is unlocked from the annular locking groove 322 by flicking the locking block 341 with a finger, and moves along the slide groove 331 on the mounting plate 33 towards the end away from the piston rod 32 and squeezes the first elastic shape until the positioning groove 343 at the bottom of the locking block cooperates with the positioning mechanism 35, and works in conjunction with the limiting stop 332 on the slide groove 331 to fix the locking block on the slide groove 331. Specifically, under the support of the second elastic element 353, the positioning block 352 in the positioning mechanism 35 slides towards the bottom of the longitudinal groove 351 when the inclined surface of the top right-angled triangular structure is squeezed by the locking block 341. When the positioning groove 343 moves to align with the positioning block 352, the positioning block 352 springs into the positioning groove 343 under the action of the second elastic element 353, thereby fixing the locking block 341.To fix the position of the adjusted piston rod 32 again, pull the pull ring 355 on the pull rod 354, causing the positioning block 352 to move downward and disengage from the positioning groove 343. At this time, the locking block 341 moves in the slide groove 331 under the action of the elastic force of the first elastic element 342, thereby engaging and locking with the annular locking groove 322 on the piston rod 32.

[0033] Working principle: When using this multi-functional negative pressure drainage ball, first open the first valve 313 and the fourth valve 25, close the second valve 314 and the third valve 24, and then operate the pressure regulating device 3. The pressure in the negative pressure ball body 1 and the liquid inlet pipe 2 is adjusted by sliding the piston rod 32 in the scale cylinder 31. At this time, the pressure gauge 22 on the three-way pipe 21 can monitor the pressure in real time, thereby improving the accuracy of negative pressure suction in the liquid inlet pipe 2. Then close the first valve 313 and the second valve 314, open the third valve 24 and the fourth valve 25, and place the free end of the inlet pipe 2 into the drainage area to perform negative pressure suction of the negative pressure drainage ball. The drainage fluid enters the negative pressure ball body 1 through the inlet pipe 2, through the three-way pipe 21 from the inlet 11. The pressure gauge 22 on the three-way pipe 21 monitors the pressure in real time and can provide feedback on whether the inlet pipe 2 is performing drainage fluid suction normally. When the drainage material blocks the inlet of the inlet pipe 2, it is necessary to clean the inlet pipe 2. At this time, open the second valve 314, and use the negative pressure in the graduated cylinder 31 to draw the cleaning fluid in the cleaning fluid container 4 into the graduated cylinder 31. Then close the second valve 314 and the fourth valve 25, open the first valve 313, and operate the piston rod 32 to squeeze the cleaning fluid out of the graduated cylinder 31.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multifunctional negative pressure drainage ball, comprising a negative pressure ball body (1), wherein the negative pressure ball body (1) is provided with an inlet (11) and an outlet (12) at both ends, characterized in that: It also includes an inlet pipe (2) and a pressure regulating device (3). One end of the inlet pipe (2) is connected to the inlet port (11) through a three-way pipe (21). A pressure gauge (22) is connected to the three-way pipe (21). The pressure regulating device (3) is connected to the inlet pipe (2). The pressure regulating device (3) includes a graduated cylinder (31) and a piston rod (32). The piston rod (32) is slidably connected to the graduated cylinder (31). The end of the graduated cylinder (31) away from the piston rod (32) is connected to the inlet pipe (2) and the cleaning liquid container (4) through a connecting pipe (311) and a cleaning pipe (312), respectively. A first valve (313) and a second valve (314) are installed on the connecting pipe (311) and the cleaning pipe (312), respectively. A third valve (24) and a fourth valve (25) are installed at both ends of the connection between the inlet pipe (2) and the connecting pipe (311).

2. The multifunctional negative pressure drainage ball according to claim 1, characterized in that: The connection between the liquid inlet pipe (2) and the connecting pipe (311) is fitted with a pipe reinforcement sleeve (23).

3. The multifunctional negative pressure drainage ball according to claim 2, characterized in that: The connecting pipe (311) is inclined toward the negative pressure ball, and the angle between the connecting pipe (311) and the liquid inlet pipe (2) is 10-30°.

4. The multifunctional negative pressure drainage ball according to claim 1, characterized in that: The negative pressure ball body (1) and the three-way pipe (21) are connected by a connector (13). One end of the connector (13) is connected to the liquid inlet (11) of the negative pressure ball body (1) by a sealing ring (131), and the other end of the connector (13) is threaded to the threaded pipe (211) at the end of the three-way pipe (21) by a threaded ring (132).

5. A multifunctional negative pressure drainage ball according to claim 1, characterized in that: The piston rod (32) is located inside the scale cylinder (31). One end of the piston (321) abuts against the inner wall of the scale cylinder (31), and the other end passes through the mounting plate (33) at the end of the scale cylinder (31). There is a gap between the mounting plate (33) and the side wall of the piston rod (32). Several sets of annular locking grooves (322) are spaced apart on the piston rod (32). A locking mechanism (34) that cooperates with the annular locking grooves (322) is installed on the mounting plate (33).

6. A multifunctional negative pressure drainage ball according to claim 5, characterized in that: The mounting plate (33) has a sliding groove (331) on its surface. The opening of the sliding groove (331) has a limiting stop (332) on both sides to restrict the locking mechanism (34) within the sliding groove (331). The locking mechanism (34) includes a locking block (341) and a first elastic member (342) located at the end of the locking block (341) away from the piston rod (32). The other end of the first elastic member (342) is fixedly connected to the end of the sliding groove (331). The bottom of the locking block (341) also has a positioning groove (343). The bottom of the sliding groove (331) has a positioning mechanism (35) that is adapted to the positioning groove (343).

7. A multifunctional negative pressure drainage ball according to claim 6, characterized in that: The positioning mechanism (35) is located in the longitudinal groove (351) at the bottom of the slide (331), and includes a positioning block (352) slidably installed in the longitudinal groove (351) and a second elastic member (353) at the bottom of the positioning block (352). The top of the positioning block (352) has a right-angled triangular structure, with the inclined surface facing the piston rod (32) and the right-angled side facing the elastic member.

8. A multifunctional negative pressure drainage ball according to claim 7, characterized in that: The bottom of the positioning block (352) is also connected to a pull rod (354), which passes through the bottom of the longitudinal groove (351) and has a pull ring (355) installed at the free end of the pull rod (354).

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