A gastrointestinal surgical care drainage device and method of use thereof

Abstract

The application belongs to the technical field of medical nursing appliances, and particularly relates to a drainage device for gastrointestinal surgery nursing and a use method thereof. The device comprises drainage tubes I, II and III and a liquid collecting bag connected in sequence, a plug-in mechanism is arranged between the drainage tube I and the drainage tube II, the plug-in mechanism comprises a male connector and a female connector, a conical plunger and a fixed ring are arranged in the female connector and are pressed by an elastic element I, a supporting column is arranged in the male connector, a negative pressure dredging mechanism is arranged between the drainage tube II and the drainage tube III, a sampling mechanism is arranged between the liquid collecting bag and the drainage tube III, the sampling mechanism comprises a plug-in end and a rotating shaft, a vertical through hole and an L-shaped fluid channel are arranged in the rotating shaft, and sealing plates I and II are fixed in the plug-in end and are used for switching the flow direction of the drainage liquid. The device is used for postoperative drainage of gastrointestinal surgery.

Description

Technical Field

[0001] This invention relates to the field of medical care equipment technology, and in particular to a drainage device for gastrointestinal surgical care and its method of use. Background Technology

[0002] In clinical gastrointestinal surgery, drainage devices are commonly used in postoperative care. Their basic components usually include a collection bag and multiple drainage tubes, through which the accumulated fluid in the patient's body is introduced into the collection bag.

[0003] Existing drainage devices have some common problems during use: the sections of the drainage tube are mostly fixed or simply plugged in. When the patient pulls or turns over unconsciously, the tube connection is easily stressed. This pulling force may be directly transmitted to the insertion site in the patient's body, which can easily irritate the wound or tissue. In severe cases, it may even cause the tube to fall out. When the tube is accidentally disconnected, the gastrointestinal fluid in the drainage tube will spill out, contaminating the bed sheets and wound environment.

[0004] During use, drainage tubes may become clogged by blood clots or food residue. Currently, conventional continuous negative pressure drainage methods have limited effectiveness in clearing such blockages and usually require medical staff to use syringes for flushing, which is difficult to achieve at night or when patients are caring for themselves at home.

[0005] Existing drainage devices often use rubber stoppers or three-way valves for their sampling ports. This makes it easy for old liquid stored in the collection bag to mix in during sampling, making it difficult to guarantee that the sample taken is fresh drainage fluid. Furthermore, there is a risk of needle puncture or leakage during the operation. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a drainage device for gastrointestinal surgery and its usage method. This device can automatically separate the connector and physically seal both ends by setting a force threshold during patient movement, preventing tube dislodgement and fluid leakage. It can also quickly clear blockages by releasing a momentary negative pressure shock wave through a pre-compressed corrugated tube without medical intervention. Furthermore, it can directly switch paths from the end of the drainage tube to obtain fresh fluid samples, avoiding interference from stale fluid. Simultaneously, the spiral flow guide and staggered flow obstruction structure within the collection bag reduce splashing and shaking / traction.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A drainage device for gastrointestinal surgical care includes a collection bag, a drainage tube I, a drainage tube II, and a drainage tube III. The drainage tube I is inserted into the patient's body to drain accumulated fluid. The drainage tubes I, II, III, and the collection bag are connected in sequence. Through the cooperation of the drainage tubes I, II, III, and the collection bag, the accumulated fluid can be drained into the collection bag and collected. Valves are provided on both the drainage tubes II and III. A connection mechanism is provided between the drainage tubes I and II to complete the connection between the drainage tubes I and II. The connection mechanism includes a male connector and a female connector. The male connector and the female connector are respectively fixed at the ends of the drainage tubes I and II that are close to each other. The male connector slides into the female connector.

[0009] A negative pressure unblocking mechanism is provided between the drainage pipe III and the drainage pipe II. When the drainage pipe I or the drainage pipe II is blocked, the mechanism releases the pre-compressed corrugated telescopic pipe to make it expand instantaneously and generate a negative pressure shock wave to unblock the drainage pipe I or the drainage pipe II. The negative pressure unblocking mechanism includes a corrugated telescopic pipe and two fixed base plates fixed at both ends of the corrugated telescopic pipe. An elastic element IV is fixed between the two fixed base plates through a spring seat.

[0010] A sampling mechanism is provided between the collection bag and the drainage tube III to extract fresh liquid samples. The sampling mechanism includes a plug-in end fixed to the top of the collection bag and connected to the collection bag. The bottom end of the drainage tube III extends fixedly into the plug-in end.

[0011] In one possible design, the insertion mechanism further includes a fixing ring sleeve fixed inside the female connector. Multiple sliding bases are slidably connected to the inner wall of the female connector. A conical plunger is fixed to one side of each sliding base that is close to the other. The conical plunger cooperates with the fixing ring sleeve to seal the fixing ring sleeve and prevent backflow of fluid in the drainage tube II. An extension rod is fixed to the side of each sliding base near the fixing ring sleeve. An inner core rod is slidably connected inside each extension rod. One end of each inner core rod is fixedly connected to the fixing ring sleeve. Multiple elastic elements I are fixed between the sliding bases and the fixing ring sleeve via spring seats. The elastic elements I are sleeved on the outer walls of the extension rods and inner core rods. A support frame is fixed inside the male connector. A support column is fixed to the side of the support frame near the female connector. The support column cooperates with the conical plunger to drive the conical plunger to move and compress the elastic elements I, releasing the seal on the fixing ring sleeve.

[0012] In one possible design, the insertion mechanism further includes multiple leakage holes I, all arranged in a ring within the support frame. A piston disc is rotatably and sealingly connected within the male connector, positioned on the side of the support frame away from the fixed ring. The piston disc seals the leakage holes I. Multiple leakage holes II are provided within the piston disc, engaging with the leakage holes I to release the seal. The inner wall of the female connector has multiple mounting slots, each containing a spring clip. The outer wall of the male connector has multiple sliding guide grooves, each containing a sliding support plate. Multiple elastic elements II are fixed between the inner walls of the moving guide groove via spring seats to drive the sliding support plate to reset and move. The sides of the multiple elastic snap rings that are close to each other extend into the sliding guide groove and apply a pushing force to the sliding support plate. The sides of the multiple sliding support plates that are close to each other are fixed with guide rods. The outer wall of the piston disc is provided with multiple positioning grooves. The ends of the multiple guide rods that are close to each other are sealed and slide into the positioning grooves. The inner walls of the two sides of the multiple positioning grooves that are far apart from each other are provided with inclined guide grooves. The two sides of the guide rods are fixed with hinge pins, and one end of the hinge pin extends into the inclined guide groove and is clearance-fitted with the inclined guide groove. The hinge pin is slidably connected to the inclined guide groove.

[0013] In one possible design, the fixed ring sleeve has an annular end face on the side near the conical plunger, and the annular end face mates with the protruding end of the conical plunger to increase the sealing between the conical plunger and the fixed ring sleeve. A bellows-type protective sleeve is fixed between each of the multiple sliding bases and the fixed ring sleeve, and the bellows-type protective sleeve is sleeved on the outside of the corresponding elastic element I to protect the elastic element I.

[0014] In one possible design, the negative pressure unblocking mechanism further includes four mounting base plates, which are arranged in pairs. Two mounting base plates in the same pair are fixed to the opposite sides of two fixed base plates. An outer side plate and an inner side plate are fixed to the opposite sides of the two mounting base plates in the same pair. The outer side plate and the inner side plate are slidably connected by a slide groove and a slide rail. The outer side plate has multiple pin holes. The inner side plate has a guide groove on the side away from the corrugated telescopic tube. A plug rod that engages with the pin holes is slidably connected in the guide groove. An elastic element III is fixed between the end of the plug rod away from the outer side plate and the inner wall of the guide groove by a spring seat.

[0015] In one possible design, the end of the connector near the pin hole is rounded.

[0016] In one possible design, the sampling mechanism includes a rotating spindle rotatably connected in a sealed manner within a plug-in end. The rotating spindle has a vertically positioned through-hole. A sealing plate I, located below the rotating spindle, is fixed within the plug-in end and is used to close the vertical through-hole. A sealing plate II, located above the rotating spindle, is also fixed within the plug-in end. The rotating spindle has an L-shaped fluid channel, which is connected by a vertical channel section and a horizontal channel section. The sealing plate II is used to close the vertical channel section. The horizontal channel section mates with the syringe port. One side of the plug-in end has a clearance groove to allow for movement of the syringe. A sealing rubber plug is detachably installed within the clearance groove to close it.

[0017] In one possible design, the collection bag is provided with a spiral guide tube, the top end of which is fixedly connected to the bottom end of the plug-in end, and a negative pressure guide tube is fixedly connected to one side of the top of the collection bag, and the negative pressure guide tube is connected to an external negative pressure suction device.

[0018] In one possible design, the liquid collection bag is provided with multiple flow-blocking strips, which are fixed between the inner walls of the two opposite sides of the liquid collection bag. The flow-blocking strips are provided with multiple flow-throttling holes, and the multiple flow-throttling holes in two adjacent flow-blocking strips are staggered.

[0019] A method of using a drainage device for gastrointestinal surgical care includes the following steps:

[0020] S1. Insert the drainage tube I into the drainage part. After it is in place, align the male connector with the female connector and push it. The support column pushes the conical plunger, causing the sliding base, the outer extension rod and the inner core rod to move. The conical plunger separates from the annular end face of the fixed ring and opens the channel. Continue pushing until the assembly slot and the sliding guide groove are axially aligned. The elastic spring clip pops out and snaps into the sliding guide groove, pushing the sliding support plate to overcome the elastic element II and move the guide slide rod towards the piston disc. The hinge pin slides in the inclined guide groove, forcing the piston disc to rotate. The leakage hole II is aligned with the leakage hole I and connects to the inner cavity. The elastic spring clip snaps in to form an axial lock, completing the docking.

[0021] S2. Open the valves of drainage pipe II and drainage pipe III. Connect the negative pressure guide pipe to the negative pressure equipment. The negative pressure of the collection bag is transmitted to the insertion end of drainage pipe I. The accumulated liquid enters the female connector through the leakage hole I and leakage hole II, and then flows into the insertion end through drainage pipe II and drainage pipe III.

[0022] S3. The vertical through hole of the rotating spindle is opened, and the accumulated liquid flows into the spiral guide tube and enters the bottom of the liquid collection bag. The sloshing energy of the accumulated liquid is dissipated through the throttling holes on the flow-blocking strip. The misalignment of the throttling holes on adjacent flow-blocking strips reduces the sloshing of the liquid surface.

[0023] S4. When sampling, remove the sealing rubber plug in the clearance groove, insert the syringe port into the horizontal channel section of the L-shaped fluid channel through the clearance groove, rotate the rotating spindle to close the vertical through hole with sealing plate I, and open the vertical channel section of the L-shaped fluid channel with the sealing plate II in a misaligned manner. The accumulated liquid flows into the syringe through the vertical channel section. After sampling, reverse the reset, the vertical through hole reopens, the vertical channel section is closed by sealing plate II, and the sealing rubber plug is put back.

[0024] S5. When blocked, close the drain pipe III valve and open the drain pipe II valve. Press the plug rod to overcome the elastic element III and make the round end of the plug rod come out of the pin hole. The fixed base moves in the opposite direction under the elastic element IV to stretch the corrugated telescopic tube. Its internal volume increases suddenly, generating a negative pressure shock wave that is transmitted to the blockage to peel off the blockage and suck in the corrugated telescopic tube. After clearing the blockage, restore the original state.

[0025] S6. When the tensile force exceeds the limit, the male connector slides out from the female connector, the support column moves away from the conical plunger, and the conical plunger resets the sliding base under the elastic element I. Its protruding end fits against the annular end face to close the channel and block the backflow of the drainage tube II. The elastic snap ring disengages from the sliding guide groove, the sliding plate resets under the elastic element II, slides in the opposite direction through the guide slide rod and the hinge pin, drives the piston disc to rotate in the opposite direction, the leakage hole II is misaligned with the leakage hole I, the piston disc closes the leakage hole I, and blocks the outflow of the drainage tube I. After separation, both ends are automatically closed.

[0026] Beneficial effects: In this invention, by setting a plug-in mechanism between drainage tube I and drainage tube II, the male and female connectors in the plug-in mechanism are connected by a spring clip that can be separated. When the drainage tube is subjected to an unexpected pulling force, the male and female connectors automatically separate to release the pulling force. At the same time, the conical plunger automatically closes the fixing ring and the piston disc automatically closes the support frame to prevent gastrointestinal fluid leakage.

[0027] In this invention, a negative pressure unblocking mechanism is set between drainage tube III and drainage tube II. The negative pressure unblocking mechanism includes a corrugated telescopic tube and an elastic element IV. By pressing the plug rod, the corrugated telescopic tube is released to generate an instantaneous strong negative pressure shock wave, which sucks the blood clots or tissue debris blocked in the drainage tube into the corrugated telescopic tube, thereby achieving rapid unblocking without medical intervention.

[0028] In this invention, a sampling mechanism is set between the collection bag and the drainage tube III. The sampling mechanism includes a rotating mandrel, a sealing plate I and a sealing plate II. By rotating the rotating mandrel, the vertical through hole is closed and the L-shaped fluid channel is opened. Fresh accumulated liquid is directly extracted from the end of the drainage tube III, avoiding the impact of extracting old accumulated liquid from the collection bag on the accuracy of the test results.

[0029] In this invention, by setting a spiral guide tube inside the collection bag, the accumulated liquid slowly flows into the bottom of the collection bag along the spiral path, avoiding splashing and air bubbles caused by the dripping of accumulated liquid, making it easier for medical staff to accurately read the amount of accumulated liquid, and at the same time preventing air bubbles from entering the negative pressure guide tube and affecting the negative pressure suction equipment;

[0030] In this invention, by setting multiple flow-blocking barriers inside the collection bag, and staggering flow holes on adjacent flow-blocking barriers, the sloshing kinetic energy of the accumulated liquid is converted into heat energy and dissipated when it passes through the flow holes, thereby reducing the sloshing amplitude of the liquid surface inside the collection bag and reducing the pulling force on the drainage tube caused by the sloshing of the collection bag. Attached Figure Description

[0031] Figure 1 A three-dimensional structural schematic diagram of a drainage device for gastrointestinal surgical care provided by the present invention;

[0032] Figure 2 This is a cross-sectional schematic diagram of the male and female connectors of a drainage device for gastrointestinal surgical care provided by the present invention.

[0033] Figure 3 A three-dimensional exploded structural diagram of the conical plunger, fixing ring, and supporting frame of a drainage device for gastrointestinal surgical care provided by the present invention;

[0034] Figure 4 A three-dimensional exploded view of the guide slide and elastic retaining spring of a drainage device for gastrointestinal surgical care provided by the present invention;

[0035] Figure 5 A three-dimensional exploded structural diagram of the extension rod and accordion-style protective sleeve of a drainage device for gastrointestinal surgical care provided by the present invention;

[0036] Figure 6 A cross-sectional view of the mounting base and corrugated telescopic tube of a drainage device for gastrointestinal surgical care provided by the present invention.

[0037] Figure 7 This is a three-dimensional exploded view of the outer and inner side plates of a drainage device for gastrointestinal surgical care provided by the present invention.

[0038] Figure 8 A three-dimensional cross-sectional view of the collection bag of a drainage device for gastrointestinal surgical care provided by the present invention;

[0039] Figure 9 A three-dimensional exploded structural diagram of the rotating mandrel, mounting base plate and sealing plate II of a drainage device for gastrointestinal surgical care provided by the present invention;

[0040] Figure 10This is a three-dimensional cross-sectional view of the rotating mandrel of a drainage device for gastrointestinal surgical care provided by the present invention.

[0041] In the diagram: 1. Collection bag; 2. Drainage tube I; 3. Drainage tube II; 4. Male connector; 5. Female connector; 6. Support frame; 7. Support column; 8. Fixing ring; 9. Sliding base; 10. Conical plunger; 11. Outer rod; 12. Inner core rod; 13. Elastic element I; 14. Bellows-style protective sleeve; 15. Annular end face; 16. Leakage hole I; 17. Piston disc; 18. Assembly slot; 19. Elastic retaining spring; 20. Sliding guide groove; 21. Sliding support plate; 22. Guide slide rod; 23. Elastic element II; 24. Positioning groove; 25. Angled guide groove; 26. Hinge 27. Connecting pin; 28. Leakage hole II; 29. ​​Corrugated expansion tube; 30. Drainage tube III; 31. Fixed base; 32. Mounting base plate; 33. Outer side plate; 34. Pin hole; 35. Inner side plate; 36. Guide groove; 37. Elastic element III; 38. Insert rod; 39. Insert end; 40. Rotating spindle; 41. Vertical through hole; 42. Sealing plate I; 43. L-shaped fluid channel; 44. Sealing plate II; 45. Clearance groove; 46. Sealing rubber plug; 47. Negative pressure guide tube; 48. Spiral guide tube; 49. Flow barrier; 50. Elastic element IV. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] In one embodiment: Refer to Figures 1-10A drainage device for gastrointestinal surgical care, relating to the field of medical care equipment technology, includes a collection bag 1, a drainage tube I2, a drainage tube II3, and a drainage tube III29. Drainage tube I2 is inserted into the patient's body to collect accumulated fluid. Drainage tubes I2, II3, III29, and the collection bag 1 are sequentially connected. Through the cooperation of drainage tubes I2, II3, III29, and the collection bag 1, accumulated fluid can be drained into the collection bag 1 for collection. Valves are provided on drainage tubes II3 and III29. A connection mechanism is provided between drainage tubes I2 and II3 to connect them. The connection mechanism includes a male connector 4 and a female connector 5, which are respectively fixed to drainage tubes I2 and II3. At the two ends that are close to each other, the male connector 4 slides into the female connector 5. A negative pressure unblocking mechanism is provided between the drainage tube Ⅲ29 and the drainage tube Ⅱ3. When the drainage tube Ⅰ2 or the drainage tube Ⅱ3 is blocked, the negative pressure is used to unblock the drainage tube Ⅰ2 or the drainage tube Ⅱ3. The negative pressure unblocking mechanism includes a corrugated telescopic tube 28 and two fixed base plates 30 fixed at both ends of the corrugated telescopic tube 28. An elastic element Ⅳ50 is fixed between the two fixed base plates 30 through a spring seat. A sampling mechanism is provided between the collection bag 1 and the drainage tube Ⅲ29. It is used to take out fresh liquid samples. The sampling mechanism includes a plug end 38 fixed at the top of the collection bag 1 and connected to the collection bag 1. The bottom end of the drainage tube Ⅲ29 is fixedly extended into the plug end 38.

[0044] Reference Figure 8 The collection bag 1 is equipped with a spiral guide tube 47, the top end of which is fixedly connected to the bottom end of the insertion end 38. The drainage fluid flows down the spiral guide tube 47 under gravity. A negative pressure guide tube 46 is fixedly connected to one side of the top of the collection bag 1, and the negative pressure guide tube 46 is connected to an external negative pressure suction device to generate a stable negative pressure inside the collection bag 1 for suction of the accumulated fluid. All valves in this invention are also manual shut-off valves, and their opening and closing are manually performed by medical personnel according to the clinical situation.

[0045] Reference Figures 1-5The insertion mechanism also includes a fixing ring 8 fixed inside the female connector 5. Multiple sliding bases 9 are slidably connected to the inner wall of the female connector 5. A conical plunger 10 is fixed to one side of each sliding base 9 that is close to the other. The conical plunger 10 cooperates with the fixing ring 8 to seal the fixing ring 8 and prevent backflow of fluid in the drainage tube II 3. An extension rod 11 is fixed to the side of each sliding base 9 near the fixing ring 8. An inner core rod 12 is slidably connected inside each extension rod 11. One end of each inner core rod 12 is fixedly connected to the fixing ring 8. Multiple elastic elements I13 are fixed between the base 9 and the fixed ring 8 via spring seats. The elastic elements I13 are sleeved on the outer wall of the outer extension rod 11 and the inner core rod 12, and are used to apply a thrust to the conical plunger 10 in the direction of the fixed ring 8. A support frame 6 is fixed inside the male connector 4. A support column 7 is fixed on the side of the support frame 6 near the female connector 5. The support column 7 cooperates with the conical plunger 10 and is used to drive the conical plunger 10 to move and compress the elastic elements I13, thereby releasing the closure of the fixed ring 8. The elastic elements I13 are configured as compression springs.

[0046] Reference Figures 2-5 The insertion mechanism also includes multiple leakage holes I16, which are arranged in a ring within the support frame 6. A piston disc 17 is rotatably connected to the male connector 4, and is located on the side of the support frame 6 away from the fixed ring 8. The piston disc 17 seals the leakage holes I16. Multiple leakage holes II27 are provided within the piston disc 17, and these holes cooperate with the leakage holes I16 to release the seal. The inner wall of the female connector 5 has multiple mounting slots 18, each containing a fixed elastic spring clip 19. The claw end of the elastic spring clip 19 has a guide slope. When subjected to axial tension, this guide slope decomposes the axial force into a radial force, thereby forcing the elastic spring clip 19 to undergo radial elastic deformation and disengage from the sliding guide groove 20. The outer wall of the male connector 4 has multiple sliding guide grooves 20. Sliding support plates 21 are slidably connected within the sliding guide groove 20. Multiple elastic elements II 23 are fixed between the sliding support plates 21 and the inner wall of the sliding guide groove 20 via spring seats, which are used to drive the sliding support plates 21 to reset and move. Multiple elastic snap rings 19 extend into the sliding guide groove 20 on the side that is close to each other and apply a pushing force to the sliding support plates 21. Guide rods 22 are fixed on the side that is close to each other of the multiple sliding support plates 21. Multiple positioning grooves 24 are provided on the outer wall of the piston disc 17. Multiple guide rods 22 extend into the positioning grooves 24 with a sealed sliding end on the side that is close to each other. Angled guide grooves 25 are provided on the inner walls of the two sides that are far apart from each other of the multiple positioning grooves 24. Hinged pins 26 are fixed on both sides of the guide rods 22, and one end of the hinge pins 26 extends into the angled guide grooves 25 and is clearance-fitted with the angled guide grooves 25. The hinge pins 26 are slidably connected to the angled guide grooves 25. The elastic element II 23 is set as a compression spring.

[0047] Specifically, when the male connector 4 is inserted into the female connector 5, the supporting column 7 pushes the conical plunger 10 away from the male connector 4, compressing the elastic element I 13 and releasing the conical plunger 10 from the sealing ring 8. Then, when the assembly slot 18 aligns with the sliding guide groove 20, the elastic retaining spring 19 extends into the sliding guide groove 20 and pushes the sliding support plate 21 and guide rod 22 towards the center, compressing the elastic element II 23. When the guide rod 22 drives the hinge pin 26 to move towards the center, the sliding engagement between the hinge pin 26 and the inclined guide groove 25 drives the piston disc 17 to rotate, thereby aligning the leakage hole II 27 with the leakage hole I 16. At this point, the male connector 4 and the female connector 5 are connected and connected. The elastic force of the elastic retaining spring 19 is greater than that of the elastic element II 23. The sum of the elastic forces of 3 and elastic element I13 causes the elastic retaining spring 19 to engage with the sliding guide groove 20, thus completing the engagement of the male connector 4 and the female connector 5. When the drainage tube I2 and drainage tube II3 are subjected to the patient's pulling force, the pulling force overcomes the elastic force of the elastic retaining spring 19, and the male connector 4 and the female connector 5 separate. Under the action of elastic element I13, the conical plunger 10 resets and closes the fixing ring 8. The sliding support plate 21 and the guide slide rod 22 reset under the action of elastic element II23, driving the piston disc 17 to reset and rotate. The leakage hole II27 is misaligned with the leakage hole I16, closing the support frame 6. This structure not only protects the internal wound from being torn by the pulling force of the drainage tube I2 and drainage tube II3, but also achieves automatic physical closure of the disconnected male connector 4 and female connector 5, preventing gastrointestinal fluid from contaminating the bed sheet.

[0048] Reference Figure 3 and Figure 5 The fixed ring sleeve 8 has an annular end face 15 on the side near the conical plunger 10, and the annular end face 15 mates with the protruding end of the conical plunger 10 to increase the sealing between the conical plunger 10 and the fixed ring sleeve 8. Multiple sliding bases 9 are fixed with bellows-type protective sleeves 14 between them and the fixed ring sleeve 8, and the bellows-type protective sleeves 14 are fitted over the corresponding elastic element I 13 to protect the elastic element I 13. Furthermore, to prevent bodily fluids from seeping into the joint gap between the male connector 4 and the female connector 5, the sliding guide grooves, and the pin mating gaps, causing contamination and jamming of internal precision components (such as elastic elements and hinge pins), a sealing gasket (not shown in the figure) is provided at the joint surface between the male connector 4 and the female connector 5, and each sliding guide groove 20 opening is covered with a stretchable flexible sealing membrane.

[0049] Reference Figure 6 and Figure 7The negative pressure unblocking mechanism also includes four mounting base plates 31. The four mounting base plates 31 are arranged in pairs. The two mounting base plates 31 in the same pair are fixed on the opposite sides of the two fixed base plates 30. The opposite sides of the two mounting base plates 31 in the same pair are respectively fixed with an outer plate 32 and an inner plate 34. The outer plate 32 and the inner plate 34 are slidably connected by a slide groove and a slide rail. The outer plate 32 is provided with multiple pin holes 33. The inner plate 34 is provided with a guide slide groove 35 on the side away from the corrugated telescopic tube 28. The guide slide groove 35 is slidably connected with a plug rod 37 that is inserted into the pin hole 33. The end of the plug rod 37 away from the outer plate 32 is fixed with an elastic element III 36 through a spring seat between it and the inner wall of the guide slide groove 35. The elastic element III 36 is a compression spring. The outer wall of the corrugated telescopic tube 28 is provided with an exhaust pipe. The exhaust pipe is provided with a valve for discharging the gas in the corrugated telescopic tube 28 when the two fixed base plates 30 are close to each other.

[0050] Specifically, under normal conditions, when the two fixed base plates 30 are brought close together, the elastic element IV 50 is compressed, and the insertion rod 37 extends into the corresponding pin hole 33 under the elastic force of the elastic element III 36, positioning the outer plate 32 and the inner plate 34. When the patient finds that the drainage tube I 2 or drainage tube II 3 is blocked by stubborn blood clots and no nurse is present, close the valve on the drainage tube III 29 and open the valve on the drainage tube II 3. Simply press the insertion rod 37 manually to insert... The connecting rod 37 disengages from the pin hole 33, and the corrugated telescopic tube 28 and the elastic element IV 50 are released from their restraints. Under the elastic force of the elastic element IV 50, the two fixed base plates 30 move to both sides. The mechanical negative pressure generated instantaneously inside the corrugated telescopic tube 28 acts on the drainage tube I 2 and the drainage tube II 3. This instantaneous negative pressure shock wave can instantly draw the stubborn blood clot stuck in the drainage tube I 2 or the drainage tube II 3 into the corrugated telescopic tube 28 through the suction force, thereby restoring the patency of the pipeline.

[0051] Reference Figure 7 The end of the connector 37 near the pin hole 33 is rounded, which is used to allow the connector 37 to be smoothly inserted into the pin hole 33.

[0052] Reference Figures 8-10The sampling mechanism includes a rotating spindle 39 sealed and rotatably connected within the insertion end 38. The rotating spindle 39 has a vertically placed vertical through hole 40. A sealing plate I 41 is fixed inside the insertion end 38, located below the rotating spindle 39, and the sealing plate I 41 is used to close the vertical through hole 40. A sealing plate II 43 is fixed inside the insertion end 38, located above the rotating spindle 39. An L-shaped fluid channel 42 is provided inside the rotating spindle 39. The L-shaped fluid channel 42 is connected by a vertical channel section and a horizontal channel section. The sealing plate II 43 is used to close the vertical channel section. The horizontal channel section cooperates with the syringe port. A clearance groove 44 is provided on one side of the insertion end 38 to allow the movement of the syringe. A sealing rubber plug 45 is detachably installed in the clearance groove 44 to close the clearance groove 44.

[0053] Specifically, under normal circumstances, sealing plate II 43 closes the vertical channel section of the L-shaped fluid channel 42. At this time, the vertical through hole 40 is misaligned with sealing plate I 41, and the accumulated fluid in the drainage tube III 29 can enter the collection bag 1 through the vertical through hole 40. When it is necessary to collect fresh accumulated fluid, the sealing rubber stopper 45 is removed, the syringe port is inserted into the L-shaped fluid channel 42, and the rotating spindle 39 is rotated by the syringe. Sealing plate I 41 closes the vertical through hole 40, and sealing plate II 43 is misaligned with the vertical channel section of the L-shaped fluid channel 42. At this time, the accumulated fluid can be collected by the syringe through the L-shaped fluid channel 42, and fresh accumulated fluid can be collected for doctors to perform tests.

[0054] In another embodiment: Refer to Figure 8 The collection bag 1 is provided with multiple flow-blocking strips 48, which are fixed between the two inner walls of the collection bag 1 that are far apart from each other. The flow-blocking strips 48 are provided with multiple flow-throttling holes 49. The multiple flow-throttling holes 49 in two adjacent flow-blocking strips 48 are staggered. When the patient walks with the drainage bag, the fluid is forced to squeeze through the staggered flow-throttling holes 49 under the action of inertia. The accumulated fluid is forced to change its flow direction between adjacent flow-blocking strips 48, which produces a damping effect and reduces the sloshing amplitude of the liquid surface in the collection bag 1.

[0055] A method of using a drainage device for gastrointestinal surgical care includes the following steps:

[0056] S1. Medical staff first insert the drainage tube I2 into the patient's body through an incision or puncture site to the area requiring drainage. This area is usually the abdominal or pelvic effusion cavity formed after gastrointestinal surgery. After the drainage tube I2 is in place, the medical staff align the male connector 4 at the end of the drainage tube I2 with the female connector 5 at the front end of the drainage tube II3, and push the male connector 4 towards the female connector 5. During the pushing process, the support column 7 inside the male connector 4 first contacts the conical plunger 10 inside the female connector 5. Under the push of the supporting column 7, the elastic force of the elastic element I13 is overcome, causing the sliding base 9, the outward extension rod 11, and the inner core rod 12 to move away from the male connector 4. The conical plunger 10 separates from the annular end face 15 of the fixing ring sleeve 8, and the channel of the fixing ring sleeve 8 is opened. As the male connector 4 continues to move into the female connector 5, when the assembly slot 18 and the sliding guide groove 20 are aligned in the axial position, the elastic retaining spring 19 fixed in the assembly slot 18 pops out from the assembly slot 18 and locks due to its own elastic deformation. After the elastic retaining spring 19 is inserted into the sliding guide groove 20, it applies a pushing force to the sliding support plate 21 within the sliding guide groove 20. Under the pushing force of the elastic retaining spring 19, the sliding support plate 21 overcomes the elastic force of the elastic element II 23, driving the guide slide rod 22 to move towards the piston disc 17. When the guide slide rod 22 moves, the hinge pins 26 on both sides of the guide slide rod 22 slide within the inclined guide grooves 25 on both sides of the positioning groove 24. Since the inclined guide grooves 25 are inclined relative to the radial direction of the piston disc 17, the hinge pins... The sliding of shaft 26 in inclined guide groove 25 forces piston disc 17 to rotate relative to male connector 4. After piston disc 17 rotates, leakage hole II 27 on piston disc 17 aligns with leakage hole I 16 on support frame 6. At this time, the inner cavity of drainage tube I 2 is connected to the inner cavity of drainage tube II 3 through leakage hole I 16 and leakage hole II 27. At the same time, after elastic snap ring 19 is inserted into sliding guide groove 20, male connector 4 and female connector 5 form a snap lock in the axial direction, completing the docking operation of drainage tube I 2 and drainage tube II 3.

[0057] S2. After the drainage tube I2 and drainage tube II3 are connected, the medical staff open the valve on drainage tube II3 and keep the valve on drainage tube III29 open. The negative pressure guide tube 46 is connected to the external negative pressure suction equipment. After the negative pressure suction equipment is started, a continuous negative pressure is generated in the collection bag 1. The negative pressure in the collection bag 1 is transmitted to the insertion end of drainage tube I2 through drainage tube III29 and drainage tube II3. Under the action of negative pressure, the accumulated fluid in the patient's body enters the drainage tube I2 through the insertion end of drainage tube I2. When the accumulated fluid flows through the male connector 4, it passes through the leakage hole I16 and leakage hole II27 and enters the female connector 5. After passing through the female connector 5, the accumulated fluid flows into the drainage tube II3 and then flows into the drainage tube III29 through the valve on the drainage tube II3. After the accumulated fluid flows out from the bottom end of the drainage tube III29, it enters the insertion end 38.

[0058] S3. Under normal circumstances, the vertical through hole 40 of the rotating mandrel 39 is in the open state, and the sealing plate I 41 does not close the vertical through hole 40. The effluent flows into the spiral guide tube 47 through the vertical through hole 40. The effluent flows downward in a spiral shape along the inner wall of the spiral guide tube 47 and finally enters the bottom space of the collection bag 1. During the storage process, the sloshing energy generated by the patient walking or moving in the collection bag 1 is dissipated when the effluent passes through the throttling hole 49 on the flow-blocking baffle 48. The throttling holes 49 on the adjacent flow-blocking baffles 48 are misaligned with each other. The effluent is forced to change its flow direction between the adjacent flow-blocking baffles 48, which produces a damping effect and reduces the sloshing amplitude of the liquid surface in the collection bag 1.

[0059] S4. When medical staff need to sample and test the patient's drainage fluid, first remove the sealing rubber plug 45 from the relief groove 44 on one side of the insertion end 38. The medical staff then take out a sterile syringe, insert the syringe end from the relief groove 44 into the insertion end 38, and into the transverse channel section of the L-shaped fluid channel 42 of the rotating mandrel 39. The medical staff holds the syringe barrel and uses the syringe to rotate the rotating mandrel 39 relative to the insertion end 38. After the rotating mandrel 39 rotates, the vertical through hole 40, which was originally misaligned with the sealing plate I 41, rotates to a position directly opposite the sealing plate I 41. The sealing plate I 41 closes the vertical through hole 40. At the same time, the vertical channel section of the L-shaped fluid channel 42 rotates to a position misaligned with the sealing plate II 43. The sealing plate II 43 no longer closes the vertical channel section of the L-shaped fluid channel 42. The fluid at the bottom of the drainage tube Ⅲ29 can enter the horizontal channel section through the vertical channel section of the L-shaped fluid channel 42 and flow into the syringe. The medical staff pulls the piston of the syringe, and the negative pressure generated by the syringe draws the fresh fluid in the drainage tube Ⅲ29 into the syringe. After sampling, the syringe drives the rotating spindle 39 to return to the initial position and pulls the syringe out of the L-shaped fluid channel 42. After the rotating spindle 39 returns to the original position, the vertical through hole 40 is misaligned with the sealing plate Ⅰ41, and the fluid in the drainage tube Ⅲ29 flows back into the collection bag 1 through the vertical through hole 40. The vertical channel section of the L-shaped fluid channel 42 is re-closed by the sealing plate Ⅱ43, and the fluid in the collection bag 1 cannot flow out through the L-shaped fluid channel 42. The medical staff reinstalls the sealing rubber stopper 45 into the clearance groove 44 to complete the sampling operation.

[0060] S5. When drainage tube I2 or drainage tube II3 becomes blocked by blood clots, tissue debris, or food residue in the patient's body, the negative pressure value inside the drainage tube will increase significantly, and the accumulated fluid cannot flow normally into the collection bag 1. When the patient or caregiver observes that the fluid level in the drainage tube no longer fluctuates or the amount of accumulated fluid in the collection bag 1 no longer increases, it is determined that the pipeline is blocked. The patient or caregiver first closes the valve on drainage tube III29 and opens the valve on drainage tube II3. Then, the patient or caregiver manually presses the insertion rod 37 on the inner side plate 34 of the negative pressure unblocking mechanism. After being pressed, the insertion rod 37 overcomes the elastic force of the elastic element III36 and moves along the guide groove 35 away from the outer side plate 32. The round end of the insertion rod 37 disengages from the pin hole 33 of the outer side plate 32. After the insertion rod 37 disengages from the pin hole 33, the outer side plate 32 and the inner side plate 32 are connected. With the positioning constraint between points 4 released, the two fixed base plates 30, under the elastic force of the elastic element IV 50, rapidly move to both sides in opposite directions. The two fixed base plates 30 cause the two ends of the corrugated expansion tube 28 to stretch to both sides, instantly increasing the internal volume of the corrugated expansion tube 28. This instantaneous increase in internal volume generates a strong negative pressure shock wave within the inner cavity of the corrugated expansion tube 28. This negative pressure shock wave is transmitted through the drainage tube II 3 to the blockage location of the drainage tube I 2. The negative pressure shock wave exerts an instantaneous and strong suction force on the blockage, peeling it from the wall of the drainage tube I 2 or drainage tube II 3 and sucking it into the drainage tube II 3. The blockage continues to move under the negative pressure and eventually enters the corrugated expansion tube 28. After the pipeline is cleared, the negative pressure in the drainage tube I 2 and drainage tube II 3 returns to normal, and the accumulated fluid begins to flow into the collection bag 1 again.

[0061] S6. When the patient turns over in bed or gets out of bed, the drainage tube I2 or drainage tube II3 may be subjected to unexpected pulling force. When the pulling force exceeds the limit, the male connector 4 will undergo axial displacement. The side wall of its sliding guide groove 20 will be forced to radially contract and disengage from the sliding guide groove 20 through the guide slope on the elastic retaining spring 19, thereby separating the male connector 4 from the female connector 5. During the process of the male connector 4 sliding out of the female connector 5, the supporting column 7 will gradually move away from the conical plunger 10. Under the elastic force of the elastic element I13, the conical plunger 10 will drive the sliding base 9 to move towards the fixed ring 8. The protruding end of the conical plunger 10 will re-fit tightly with the annular end face 15 of the fixed ring 8, sealing the channel of the fixed ring 8 and blocking the backflow of the accumulated fluid in the drainage tube II3 to the female connector. At the same time, the elastic spring clip 19 disengages from the sliding guide groove 20, and the sliding support plate 21 loses the thrust of the elastic spring clip 19. Under the elastic force of the elastic element II 23, the sliding support plate 21 moves away from the piston plate 17 along the sliding guide groove 20. The sliding support plate 21 drives the guide slide rod 22 and the hinge pin 26 to move away from the piston plate 17. The hinge pin 26 slides in the opposite direction in the inclined guide groove 25, driving the piston plate 17 to rotate in the opposite direction and reset. After the piston plate 17 is reset, the leakage hole II 27 is misaligned with the leakage hole I 16. The piston plate 17 closes the leakage hole I 16 on the support frame 6, blocking the liquid in the drainage tube I 2 from flowing out from the male connector 4 end. After the male connector 4 and the female connector 5 are separated, the ports of the drainage tube I 2 and the drainage tube II 3 are automatically closed.

[0062] It is worth noting that this device is preferably a disposable sterile drainage device. If reuse is required, the drainage tubing and connection mechanism should be repeatedly flushed with medical cleaning solution immediately after each use, and the flexibility of each elastic and sliding component should be checked to ensure that there is no contaminant residue or jamming, thus guaranteeing its safety and effectiveness.

[0063] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A drainage device for gastrointestinal surgical care, comprising a collection bag (1), a drainage tube I (2), a drainage tube II (3), and a drainage tube III (29), wherein the drainage tube I (2) is inserted into the patient's body to collect accumulated fluid, the drainage tube I (2), the drainage tube II (3), the drainage tube III (29), and the collection bag (1) are connected in sequence, and the accumulated fluid can be drained into the collection bag (1) and collected through the cooperation of the drainage tube I (2), the drainage tube II (3), the drainage tube III (29), and the collection bag (1), wherein the drainage tube II (3) and the drainage tube III (29) are each provided with a valve, characterized in that, A connector is provided between the drainage tube I (2) and the drainage tube II (3) to complete the docking of the drainage tube I (2) and the drainage tube II (3). The connector includes a male connector (4) and a female connector (5). The male connector (4) and the female connector (5) are respectively fixed at the ends of the drainage tube I (2) and the drainage tube II (3) that are close to each other. The male connector (4) slides into the female connector (5). A negative pressure unblocking mechanism is provided between the drainage pipe Ⅲ (29) and the drainage pipe Ⅱ (3). When the drainage pipe Ⅰ (2) or the drainage pipe Ⅱ (3) is blocked, the mechanism releases the pre-compressed corrugated telescopic pipe (28) to make it expand instantaneously and generate a negative pressure shock wave to unblock the drainage pipe Ⅰ (2) or the drainage pipe Ⅱ (3). The negative pressure unblocking mechanism includes a corrugated telescopic pipe (28) and two fixed base plates (30) fixed at both ends of the corrugated telescopic pipe (28). An elastic element Ⅳ (50) is fixed between the two fixed base plates (30) through a spring seat. A sampling mechanism is provided between the collection bag (1) and the drainage tube III (29) to extract fresh liquid samples. The sampling mechanism includes a plug-in end (38) fixed on the top of the collection bag (1) and connected to the collection bag (1). The bottom end of the drainage tube III (29) extends into the plug-in end (38).

2. The drainage device for gastrointestinal surgical care according to claim 1, characterized in that, The insertion mechanism also includes a fixing ring (8) fixed inside the female connector (5). Multiple sliding bases (9) are slidably connected to the inner wall of the female connector (5). A conical plunger (10) is fixed to one side of each sliding base (9) that is close to the other. The conical plunger (10) cooperates with the fixing ring (8) to close the fixing ring (8) and prevent backflow of fluid in the drainage tube II (3). An extension rod (11) is fixed to the side of each sliding base (9) that is close to the fixing ring (8). An inner core rod (12) is slidably connected to each of the extension rods (11). One end of (12) is fixedly connected to the fixed ring (8). Multiple elastic elements I (13) are fixed between the sliding base (9) and the fixed ring (8) through spring seats. The elastic elements I (13) are sleeved on the outer wall of the extension rod (11) and the inner core rod (12). A support frame (6) is fixed inside the male connector (4). A support column (7) is fixed on the side of the support frame (6) near the female connector (5). The support column (7) cooperates with the conical plunger (10) to drive the conical plunger (10) to move and compress the elastic elements I (13) to release the closure of the fixed ring (8).

3. A drainage device for gastrointestinal surgical care according to claim 2, characterized in that, The insertion mechanism also includes multiple leakage holes I (16), which are arranged in a ring within the support frame (6). A piston disc (17) is rotatably connected to the male connector (4), and the piston disc (17) is located on the side of the support frame (6) away from the fixed ring (8). The piston disc (17) is used to close the leakage holes I (16). Multiple leakage holes II (27) are provided in the piston disc (17), and the leakage holes II (27) cooperate with the leakage holes I (16) to release the closure of the leakage holes I (16). Multiple assembly slots (18) are provided on the inner wall of the female connector (5), and elastic spring clips (19) are fixedly installed in each of the multiple assembly slots (18). Multiple sliding guide grooves (20) are provided on the outer wall of the male connector (4), and sliding support plates (21) are slidably connected in each of the multiple sliding guide grooves (20). The sliding support plates (21) and sliding guide plates are slidably connected in each of the multiple sliding guide grooves (20). Multiple elastic elements II (23) are fixed between the inner walls of the groove (20) by spring seats to drive the sliding plate (21) to reset and move. The side of the multiple elastic snap rings (19) that are close to each other extends into the sliding guide groove (20) and applies a thrust to the sliding plate (21). The side of the multiple sliding plates (21) that are close to each other is fixed with guide rods (22). The outer wall of the piston disc (17) is provided with multiple positioning grooves (24). The end of the multiple guide rods (22) that are close to each other is sealed and slides into the positioning groove (24). The inner walls of the two sides of the multiple positioning grooves (24) that are far apart from each other are provided with inclined guide grooves (25). The two sides of the guide rods (22) are fixed with hinge pins (26), and one end of the hinge pins (26) extends into the inclined guide grooves (25) and is clearance-fitted with the inclined guide grooves (25). The hinge pins (26) and the inclined guide grooves (25) are slidably connected.

4. A drainage device for gastrointestinal surgical care according to claim 3, characterized in that, The fixed ring sleeve (8) has an annular end face (15) on the side near the conical plunger (10), and the annular end face (15) cooperates with the protruding end of the conical plunger (10) to increase the sealing between the conical plunger (10) and the fixed ring sleeve (8). A bellows-type protective sleeve (14) is fixed between the multiple sliding bases (9) and the fixed ring sleeve (8), and the bellows-type protective sleeve (14) is sleeved on the outside of the corresponding elastic element I (13) to protect the elastic element I (13).

5. A drainage device for gastrointestinal surgical care according to claim 4, characterized in that, The negative pressure unblocking mechanism also includes four mounting base plates (31). The four mounting base plates (31) are in pairs. The two mounting base plates (31) in the same group are respectively fixed on the opposite side of the two fixed base plates (30). The opposite side of the two mounting base plates (31) in the same group are respectively fixed with an outer plate (32) and an inner plate (34). The outer plate (32) and the inner plate (34) are slidably connected by a slide groove and a slide rail. The outer plate (32) is provided with multiple pin holes (33). The inner plate (34) is provided with a guide slide groove (35) on the side away from the corrugated telescopic tube (28). The guide slide groove (35) is slidably connected with a plug rod (37) that is inserted into the pin hole (33). The end of the plug rod (37) away from the outer plate (32) is fixed with an elastic element III (36) between the inner wall of the guide slide groove (35) and the inner wall of the guide slide groove (35) by a spring seat.

6. A drainage device for gastrointestinal surgical care according to claim 5, characterized in that, The end of the connector (37) near the pin hole (33) is rounded.

7. A drainage device for gastrointestinal surgical care according to claim 6, characterized in that, The sampling mechanism includes a rotating spindle (39) rotatably connected in a sealed manner within a plug-in end (38). The rotating spindle (39) has a vertically positioned through hole (40). A sealing plate I (41) is fixed inside the plug-in end (38) below the rotating spindle (39), and the sealing plate I (41) is used to close the vertical through hole (40). A sealing plate II (43) is fixed inside the plug-in end (38) above the rotating spindle (39). 39) is provided with an L-shaped fluid channel (42), which is connected by a vertical channel section and a horizontal channel section. The sealing plate II (43) is used to close the vertical channel section. The horizontal channel section is matched with the syringe port. The plug end (38) is provided with a relief groove (44) on one side to allow the movement of the syringe. A sealing rubber plug (45) is detachably installed in the relief groove (44) to close the relief groove (44).

8. A drainage device for gastrointestinal surgical care according to claim 7, characterized in that, The liquid collection bag (1) is provided with a spiral guide tube (47), the top end of the spiral guide tube (47) is fixedly connected to the bottom end of the plug-in end (38), and a negative pressure guide tube (46) is fixedly connected to one side of the top of the liquid collection bag (1), and the negative pressure guide tube (46) is connected to the negative pressure suction device of the outside.

9. A drainage device for gastrointestinal surgical care according to claim 8, characterized in that, The liquid collection bag (1) is provided with multiple flow-blocking strips (48), which are fixed between the two inner walls of the liquid collection bag (1) that are far apart from each other. The flow-blocking strips (48) are provided with multiple flow-throttling holes (49), and the multiple flow-throttling holes (49) in two adjacent flow-blocking strips (48) are staggered.

10. A method of using a drainage device for gastrointestinal surgical care, applied to the drainage device for gastrointestinal surgical care as described in claim 9, characterized in that, Includes the following steps: S1. Insert the end of the drainage tube I (2) into the drainage part. After it is in place, push the male connector (4) to the female connector (5). The support column (7) pushes the conical plunger (10) to move the sliding base (9), the extension rod (11) and the inner core rod (12). The conical plunger (10) separates from the annular end face (15) of the fixed ring sleeve (8) to open the channel. Continue to push until the assembly slot (18) and the sliding guide groove (20) are axially aligned. The elastic spring plate (19) pops out and is inserted into the sliding guide groove (20). Push the sliding plate (21) to overcome the elastic element II (23) so that the guide slide rod (22) moves towards the piston plate (17). The hinge pin (26) slides in the inclined guide groove (25) to force the piston plate (17) to rotate. The leakage hole II (27) is aligned with the leakage hole I (16) to connect the inner cavity. The elastic spring plate (19) is inserted to form an axial lock and complete the docking. S2. Open the valves of drainage pipe II (3) and drainage pipe III (29), connect the negative pressure guide pipe (46) to the negative pressure device, and transfer the negative pressure of the collection bag (1) to the insertion end of drainage pipe I (2). The accumulated liquid enters the female connector (5) through the leakage hole I (16) and leakage hole II (27), and then flows into the plug end (38) through drainage pipe II (3) and drainage pipe III (29). S3. The vertical through hole (40) of the rotating spindle (39) is opened, and the accumulated liquid flows into the spiral guide tube (47) and enters the bottom of the liquid collection bag (1). The sloshing energy of the accumulated liquid is dissipated through the throttling hole (49) on the flow-blocking strip (48). The misalignment of the throttling holes (49) on the adjacent flow-blocking strips (48) reduces the sloshing of the liquid surface. S4. When sampling, remove the sealing rubber plug (45) in the clearance groove (44), insert the syringe port into the horizontal channel section of the L-shaped fluid channel (42) through the clearance groove (44), rotate the rotating spindle (39) so that the vertical through hole (40) is closed by the sealing plate I (41), the vertical channel section of the L-shaped fluid channel (42) and the sealing plate II (43) are misaligned and opened, the accumulated liquid flows into the syringe through the vertical channel section, after sampling, reverse the reset, the vertical through hole (40) reopens, the vertical channel section is closed by the sealing plate II (43), and the sealing rubber plug (45) is put back. S5. When blocked, close the valve of drainage pipe Ⅲ (29) and open the valve of drainage pipe Ⅱ (3). Press the plug rod (37) to overcome the elastic element Ⅲ (36) so that the round end of the plug rod (37) comes out from the pin hole (33). The fixed base (30) moves in the opposite direction under the elastic element Ⅳ (50) to stretch the corrugated telescopic tube (28). Its internal volume increases suddenly, generating a negative pressure shock wave that is transmitted to the blockage to peel off the blockage and suck in the corrugated telescopic tube (28). After clearing, it is restored. S6. When the tensile force exceeds the limit, the male connector (4) slides out from the female connector (5), the support column (7) moves away from the conical plunger (10), the conical plunger (10) resets the sliding base (9) under the elastic element I (13), its protruding end fits the annular end face (15) to close the channel and block the backflow of the drainage tube II (3); the elastic snap ring (19) disengages from the sliding guide groove (20), the sliding plate (21) resets under the elastic element II (23), slides in the opposite direction through the guide slide rod (22) and the hinge pin (26), drives the piston disc (17) to rotate in the opposite direction, the leakage hole II (27) is misaligned with the leakage hole I (16), the piston disc (17) closes the leakage hole I (16), blocks the outflow of the drainage tube I (2), and the two ends are automatically closed after separation.

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