Postoperative drainage device

Abstract

The invention relates to the technical field of medical instruments, in particular to a postoperative drainage device which is used for solving the problem that an existing drainage device cannot meet various drainage requirements easily. The device comprises a gravity drainage mechanism, a peristaltic drainage mechanism and a negative pressure drainage mechanism, the gravity drainage mechanism comprises a drainage bottle, the drainage bottle is communicated with a drainage tube, and a taper hole is formed in the top wall; the peristaltic drainage mechanism is used for applying pressure to the drainage tube to generate drainage negative pressure; the negative-pressure drainage mechanism comprises a negative-pressure pipe communicated with the drainage bottle and a negative-pressure pump arranged on the negative-pressure pipe, and when the negative-pressure pump operates, the taper hole is in a blocked state; when the gravity drainage mechanism operates, the peristaltic drainage mechanism and the negative pressure drainage mechanism stop operating, and when the gravity drainage mechanism stops operating, the peristaltic drainage mechanism and / or the negative pressure drainage mechanism operate; when the negative pressure in the drainage tube is increased, the peristaltic drainage mechanism and the negative pressure drainage mechanism operate synchronously to generate pulse negative pressure; the device can meet different drainage requirements.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a postoperative drainage device. Background Technology

[0002] In surgical clinical treatment, postoperative drainage is a crucial step in preventing complications such as infection, hematoma, and anastomotic leakage, and ensuring the patient's postoperative recovery. Its core objective is to drain accumulated fluid, blood, pus, and other bodily fluids from the surgical area in a timely and efficient manner through scientific drainage methods, creating favorable conditions for wound healing. Currently, commonly used postoperative drainage devices are mainly divided into three categories: gravity drainage, peristaltic drainage, and negative pressure drainage. Each type of device is adapted to specific scenarios based on different drainage principles, but all have significant technical limitations and cannot meet the complex and ever-changing clinical drainage needs.

[0003] Gravity drainage devices rely on the height difference between the drainage site and the drainage bottle to achieve passive drainage through gravity or siphon effect. They have advantages such as simple structure, convenient operation, low cost, and no additional mechanical damage to the wound, making them suitable for scenarios with little postoperative exudate and shallow wounds. However, the drainage power of this type of device depends entirely on natural force. When dealing with viscous fluids (such as pus or blood clots), the drainage efficiency is extremely low, and tube blockage is prone to occur, leading to residual fluid and increasing the risk of infection. At the same time, they cannot meet the drainage needs of large exudates or deep surgeries, severely limiting their application scenarios.

[0004] Peristaltic drainage devices generate negative pressure or pushing force by squeezing the drainage tube through a peristaltic mechanism, achieving active drainage. Compared to gravity drainage, it has stronger drainage power and can disperse viscous clumps within the tube through squeezing action, alleviating blockage problems to some extent, making it suitable for drainage scenarios involving viscous body fluids. However, most existing peristaltic drainage devices are standalone devices and cannot be adapted to gravity drainage modes; moreover, when the drainage tube is severely blocked, the single peristaltic squeezing force is often insufficient to completely clear the tube, easily resulting in "ineffective squeezing"; in addition, some peristaltic drainage devices are installed in unreasonable positions, with limited relief effect on blockages near the patient's wound, still resulting in incomplete drainage.

[0005] Negative pressure drainage devices create negative pressure within the drainage bottle using a negative pressure pump, actively absorbing surface fluid from the wound. This results in high drainage efficiency and is suitable for scenarios involving large amounts of exudate or deep surgeries. However, existing negative pressure drainage devices have two major drawbacks: First, switching between negative pressure mode and gravity / peristaltic mode requires multiple independent devices, making operation cumbersome. Furthermore, the drainage channel is easily exposed to the outside environment during switching, increasing the risk of fluid backflow and cross-infection. Second, conventional negative pressure drainage uses continuous negative pressure. When encountering viscous fluid or tubing blockage, continuous negative pressure can cause the blockage to adhere more tightly to the tube wall, worsening the blockage. Additionally, excessively high continuous negative pressure can damage fragile wound tissue, leading to secondary bleeding.

[0006] In clinical practice, patients' postoperative drainage needs are dynamically changing: in the early postoperative period, a large amount of thin oozing blood may need to be drained quickly; in the middle period, viscous oozing may occur; and in the later period, as the amount of oozing decreases, gentle gravity drainage can be switched to. Furthermore, tube blockage is a common problem during drainage, requiring targeted unblocking measures. Current technologies not only lack integrated devices that combine gravity, peristalsis, and negative pressure drainage modes, making it impossible to easily switch between different modes to adapt to dynamic drainage needs, but also fail to address the difficulty of unblocking with a single drainage force when blocked. In particular, there is a lack of technical solutions that utilize the combined effects of peristalsis and negative pressure to generate pulsed negative pressure for efficient unblocking and improved drainage of viscous fluids. Summary of the Invention

[0007] This invention provides a postoperative drainage device to solve the problem that existing drainage devices cannot easily meet various drainage needs.

[0008] To alleviate the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0009] A postoperative drainage device includes a gravity drainage mechanism, a peristaltic drainage mechanism, and a negative pressure drainage mechanism;

[0010] The gravity drainage mechanism includes a drainage bottle, which is connected to a drainage tube and has a conical hole on its top wall;

[0011] The peristaltic drainage mechanism is disposed on the drainage bottle and is used to apply pressure to the drainage tube to generate a negative drainage pressure;

[0012] The negative pressure drainage mechanism is disposed on the drainage bottle and includes a negative pressure tube connected to the drainage bottle and a negative pressure pump disposed on the negative pressure tube. When the negative pressure pump is running, the conical hole is in a blocked state.

[0013] When the gravity drainage mechanism is running, the peristaltic drainage mechanism and the negative pressure drainage mechanism stop running; and when the gravity drainage mechanism stops running, the peristaltic drainage mechanism and / or the negative pressure drainage mechanism runs.

[0014] When the negative pressure inside the drainage tube increases, the peristaltic drainage mechanism and the negative pressure drainage mechanism operate synchronously to generate pulsed negative pressure.

[0015] Furthermore, the gravity drainage mechanism includes a rotating shaft that rotates on a fixed axis around the drainage bottle. Three rotating rollers are mounted in a circular array on the rotating shaft. A baffle is mounted on the drainage bottle. The drainage tube is located between the rotating rollers and the baffle. When the rotating shaft rotates, the three rotating rollers alternately apply pressure to the drainage tube, thereby applying negative pressure to the drainage tube.

[0016] Furthermore, a toothed gear is fixedly connected to the end of the rotating shaft, and the toothed gear is provided with three sets of teeth that correspond one-to-one with the three rotating rollers;

[0017] A first electric telescopic rod is fixedly connected to the baffle. A rack is fixedly connected to the output end of the first electric telescopic rod. When the rotating shaft stops rotating, the first electric telescopic rod extends. When one of the rotating rollers applies pressure to the drainage pipe, the rack can engage with the corresponding tooth, so that the rotating roller can avoid the drainage pipe. When the rotating roller stops rotating and all three rotating rollers avoid the drainage pipe, the rack does not engage with any of the teeth when it extends.

[0018] Furthermore, a second electric telescopic rod is fixedly connected to the drainage bottle, and the output end of the second electric telescopic rod is fixedly connected to the baffle. After the first electric telescopic rod is fully extended, the second electric telescopic rod first extends and then shortens, thereby driving the rotating shaft to rotate through the rotating roller, so that the teeth on the toothed gear move away from the rack.

[0019] Furthermore, the negative pressure drainage mechanism also includes a cone head that slides vertically on the upper part of the cone hole. When the cone head is pulled out of the cone hole and the negative pressure pump is not running, the drainage bottle is in a gravity drainage state. When the cone head is inserted into the cone hole and the negative pressure pump is running, the drainage bottle is in a negative pressure drainage state.

[0020] Furthermore, a pressure-transmitting tube is connected to the cone head, and a cylinder is connected to the top of the pressure-transmitting tube. A circular plate is slidably connected inside the cylinder, and a first spring is connected between the circular plate and the bottom wall of the cylinder. When the negative pressure inside the drainage bottle increases, the circular plate moves down, thereby reducing the negative pressure intensity inside the drainage bottle.

[0021] Furthermore, a displacement sensor is installed inside the cylinder. When the displacement sensor detects that the circular plate moves downward while the negative pressure pump is operating alone, the rotational speed of the negative pressure pump decreases, and when the circular plate moves upward, the rotational speed of the negative pressure pump recovers.

[0022] Furthermore, a rod is fixedly connected to the side wall of the cylinder, and a tube is fixedly connected to the top wall of the drainage bottle. When the negative pressure pump is running, the rod can slide into the tube, so that the cone head is inserted into the cone hole.

[0023] Furthermore, a second spring is connected between the insert and the rod, and a pressure pipe is connected between the insert and the negative pressure pipe. When the negative pressure pump is running, it can transmit pressure to the insert through the pressure pipe, so that the rod applies pressure to the second spring.

[0024] Furthermore, a third electric telescopic rod is fixedly connected inside the drainage bottle, and a support cylinder is fixedly connected to the output end of the third electric telescopic rod, with the support cylinder inserted into the drainage tube;

[0025] A pressure sensor is installed on the drainage tube. When the shaft rotates and the negative pressure pump is running, if the negative pressure intensity inside the drainage tube increases, the third electric telescopic rod will reciprocate and extend with the rotation of the shaft, and the support cylinder can avoid the squeezing of the rotating roller and open the pressure-bearing part of the drainage tube.

[0026] The beneficial effects of this invention are analyzed as follows:

[0027] A postoperative drainage device includes a gravity drainage mechanism, a peristaltic drainage mechanism, and a negative pressure drainage mechanism. The gravity drainage mechanism includes a drainage bottle with a drainage tube connected to it and a conical hole in its top wall. The peristaltic drainage mechanism is disposed in the drainage bottle and is used to apply pressure to the drainage tube to generate negative drainage pressure. The negative pressure drainage mechanism is disposed in the drainage bottle and includes a negative pressure tube connected to the drainage bottle and a negative pressure pump disposed in the negative pressure tube. When the negative pressure pump is running, the conical hole is blocked. When the gravity drainage mechanism is running, the peristaltic drainage mechanism and the negative pressure drainage mechanism stop running, and when the gravity drainage mechanism stops running, the peristaltic drainage mechanism and / or the negative pressure drainage mechanism runs. When the negative pressure in the drainage tube increases, the peristaltic drainage mechanism and the negative pressure drainage mechanism operate synchronously to generate pulsed negative pressure.

[0028] When using this device, one end of the drainage tube is placed on the area of ​​the patient's body requiring drainage, and the other end is inserted into the drainage bottle. In cases requiring passive drainage, the conical orifice on the drainage bottle is open, allowing fluid to drain into the bottle via gravity or siphon action. When the fluid to be drained is viscous, relying solely on gravity drainage will be ineffective. In this case, a peristaltic drainage mechanism is activated. When only the peristaltic drainage mechanism is activated, the conical orifice remains open. The peristaltic drainage mechanism is located on the drainage bottle and on the drainage tube near the bottle end. The peristaltic drainage mechanism and the drainage tube work together to form a peristaltic pump structure, subjecting the drainage tube to repeated pressure, thereby generating negative pressure inside the drainage tube, providing the power for the drainage of viscous fluid. Simultaneously, the peristaltic pump structure also allows the fluid near the drainage bottle to drain. The viscous fluid that may have clumps inside the drainage tube is dispersed by pressure. When the negative pressure inside the drainage tube continues to increase, it indicates that the drainage tube may be blocked. At this time, the conical orifice is closed, and the negative pressure drainage mechanism is activated, creating negative pressure inside the drainage bottle. Meanwhile, the peristaltic drainage mechanism is still running, intermittently applying pressure to the drainage tube, allowing it to remain open intermittently. When the drainage tube is open, the negative pressure inside the drainage bottle is released intermittently, generating negative pressure in a pulsed manner to drain the viscous fluid and relieve any blockages in the drainage tube. For cases where fluid needs to be drained quickly and is not viscous, the negative pressure drainage mechanism is activated separately. In this case, the conical orifice is closed, and negative pressure is generated inside the drainage bottle, allowing the fluid to be drained as quickly as possible. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention with the cone block inserted into the cone hole;

[0030] Figure 2 This is a schematic diagram of the structure of the cone block in the cone hole of the present invention;

[0031] Figure 3 This is a cross-sectional view of the present invention;

[0032] Figure 4 This is a schematic diagram of the peristaltic drainage mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the support cylinder of the present invention;

[0034] Figure 6 This is a schematic diagram of the cylindrical part of the present invention.

[0035] In the diagram: 100, Gravity drainage mechanism; 110, Drainage bottle; 111, Drainage tube; 120, Conical hole; 200, Peristaltic drainage mechanism; 210, Rotary seat; 220, Rotating shaft; 230, Support; 240, Rotating roller; 250, Motor; 260, Baffle; 270, Second electric telescopic rod; 280, First electric telescopic rod; 281, Rack; 290, Gear with missing teeth; 300, Negative pressure drainage mechanism; 310, Negative pressure pump; 320, Negative pressure tube; 330, Cylinder; 331, Pressure transmission tube; 332, Conical head; 340, Circular plate; 341, First spring; 350, Displacement sensor; 360, Insert rod; 361, Insert sleeve; 362, Second spring; 363, Pressure tube; 370, Third electric telescopic rod; 380, Support sleeve. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Examples, such as Figures 1-6 As shown, a postoperative drainage device includes a gravity drainage mechanism 100, a peristaltic drainage mechanism 200, and a negative pressure drainage mechanism 300. The gravity drainage mechanism 100 includes a drainage bottle 110, a drainage tube 111 connected to the drainage bottle 110, and a conical hole 120 opened on the top wall. The peristaltic drainage mechanism 200 is disposed on the drainage bottle 110 and is used to apply pressure to the drainage tube 111 to generate negative drainage pressure. The negative pressure drainage mechanism 300 is disposed on the drainage bottle 110 and includes a negative pressure tube 3 connected to the drainage bottle 110. 20 and the negative pressure pump 310 installed in the negative pressure pipe 320. When the negative pressure pump 310 is running, the conical hole 120 is in a blocked state; when the gravity drainage mechanism 100 is running, the peristaltic drainage mechanism 200 and the negative pressure drainage mechanism 300 stop running, and when the gravity drainage mechanism 100 stops running, the peristaltic drainage mechanism 200 and / or the negative pressure drainage mechanism 300 run; when the negative pressure in the drainage pipe 111 increases, the peristaltic drainage mechanism 200 and the negative pressure drainage mechanism 300 run synchronously to generate pulse negative pressure.

[0038] The working mechanism of the postoperative drainage device provided in this embodiment is as follows:

[0039] When using the device, one end of the drainage tube 111 is placed at the part of the patient's body that needs drainage, and the other end is inserted into the drainage bottle 110. When passive drainage is required, the conical hole 120 on the drainage bottle 110 is opened, and the body fluid is discharged into the drainage bottle 110 by gravity or siphon.

[0040] When the body fluid to be drained is relatively viscous, relying solely on the gravity drainage mechanism 100 will not be effective. In this case, the peristaltic drainage mechanism 200 is activated. When only the peristaltic drainage mechanism 200 is activated, the cone orifice 120 is kept open. The peristaltic drainage mechanism 200 is set on the drainage bottle 110 and is located on the drainage tube 111 near the end of the drainage bottle 110. The peristaltic drainage mechanism 200 and the drainage tube 111 cooperate to form a peristaltic pump structure, which makes the drainage tube 111 repeatedly compressed, thereby generating negative pressure inside the drainage tube 111, providing power for the drainage of viscous body fluid. At the same time, the peristaltic pump structure can also press and disperse any viscous body fluid that may have clumped in the drainage tube 111 near the drainage bottle 110.

[0041] When the negative pressure inside the drainage tube 111 continues to increase, it indicates that the drainage tube 111 may be blocked. At this time, the conical hole 120 is closed, and the negative pressure drainage mechanism 300 is activated, which generates negative pressure inside the drainage bottle 110. Meanwhile, the peristaltic drainage mechanism 200 is still in operation. The peristaltic drainage mechanism 200 applies pressure to the drainage tube 111 intermittently, allowing the drainage tube 111 to be unobstructed intermittently. When the drainage tube 111 is unobstructed, the negative pressure inside the drainage bottle 110 is released intermittently, and the negative pressure is generated in a pulse manner to provide drainage for viscous body fluids, while relieving the blockage of the drainage tube 111.

[0042] For cases where bodily fluids need to be drained quickly and are not viscous, the negative pressure drainage mechanism 300 is activated separately. At this time, the conical hole 120 is closed, and negative pressure is generated in the drainage bottle 110, so that the bodily fluids can be drained as quickly as possible.

[0043] Among the optional methods in this embodiment, the more preferred one is:

[0044] The gravity drainage mechanism 100 includes a rotating shaft 220 that rotates on a fixed axis around a drainage bottle 110. Three rotating rollers 240 are mounted in a circular array on the rotating shaft 220. A baffle 260 is mounted on the drainage bottle 110. The drainage tube 111 is located between the rotating rollers 240 and the baffle 260. When the rotating shaft 220 rotates, the three rotating rollers 240 alternately apply pressure to the drainage tube 111, thereby applying negative pressure to the drainage tube 111.

[0045] A motor 250 is installed on the drainage bottle 110. When the motor 250 runs, it drives the rotating shaft 220 to rotate. A rotating seat 210 is installed on the drainage bottle 110 to support the rotating shaft 220. Three supports 230 are connected in a ring array on the rotating shaft 220. Three rotating rollers 240 are rotatably connected to the three supports 230 respectively. When the rotating shaft 220 rotates, it can drive the three rotating rollers 240 to revolve through the three supports 230. At this time, the three rotating rollers 240 alternately press the drainage tube 111 against the baffle 260, thereby forming a peristaltic pump structure to provide negative pressure suction power for the drainage tube 111.

[0046] The baffle 260 is a vertical plate. When the rotating shaft 220 rotates, only one roller 240 completely flattens the drainage tube 111. After a short time interval, the other drainage tube 111 will come into contact with and apply pressure to the drainage tube 111. During this short time interval, the peristaltic drainage mechanism 200 and the negative pressure drainage mechanism 300 operate synchronously, and the negative pressure in the drainage bottle 110 can be released in a pulse manner.

[0047] Among the optional methods in this embodiment, the more preferred one is:

[0048] A toothed gear 290 is fixedly connected to the end of the rotating shaft 220. The toothed gear 290 has three sets of teeth that correspond one-to-one with the three rotating rollers 240. A first electric telescopic rod 280 is fixedly connected to the baffle 260. A rack 281 is fixedly connected to the output end of the first electric telescopic rod 280. When the rotating shaft 220 stops rotating, the first electric telescopic rod 280 extends. When one of the rotating rollers 240 applies pressure to the drainage pipe 111, the rack 281 can mesh with the corresponding teeth, so that the rotating roller 240 can avoid the drainage pipe 111. When the rotating roller 240 stops rotating and all three rotating rollers 240 avoid the drainage pipe 111, the rack 281 does not mesh with any teeth when it extends.

[0049] When the peristaltic drainage mechanism 200 stops operating and the negative pressure drainage mechanism 300 takes over, or when the negative pressure drainage mechanism 300 starts operating directly, the first electric telescopic rod 280 is initially in an extended state, so that the rack 281 at the output end of the first electric telescopic rod 280 extends. If any roller 240 applies pressure to the drainage tube 111 at this time, the teeth on the toothed gear 290 corresponding to this roller 240 can mesh with the rack 281. At this time, the extended rack 281 can drive the toothed gear 290 to rotate. When the toothed gear 290 rotates to the point where the driving roller 240 no longer applies pressure to the drainage tube 111, the teeth on the toothed gear 290 no longer mesh with the toothed gear 290, so that the rack 281 no longer meshes with the toothed gear 290. At this time, all rollers 240 can avoid the drainage tube 111, thereby preventing the drainage tube 111 from being compressed and its inner diameter from shrinking, ensuring the unobstructed flow of the drainage tube 111 in the negative pressure drainage state.

[0050] Among the optional methods in this embodiment, the more preferred one is:

[0051] A second electric telescopic rod 270 is fixedly connected to the drainage bottle 110. The output end of the second electric telescopic rod 270 is fixedly connected to the baffle 260. After the first electric telescopic rod 280 is fully extended, the second electric telescopic rod 270 first extends and then shortens, so that it can drive the rotating shaft 220 to rotate through the rotating roller 240, thereby causing the teeth on the toothed gear 290 to move away from the rack 281.

[0052] Of the three supports 230, the included angle between any two adjacent supports is 120 degrees. After the first electric telescopic rod 280 is fully extended, the second electric telescopic rod 270 extends first. At this time, the baffle 260 moves closer to the rotating shaft 220, so that the baffle 260 can simultaneously push the two closest rotating rollers 240, causing the rotating shaft 220 to rotate at a small angle. At this time, the midline of the included angle between the two supports 230 on the two rotating rollers 240 closest to the baffle 260 can be perpendicular to the baffle 260. At this time, the toothed gear 29... The first electric telescopic rod 270 rotates synchronously with the rotating shaft 220, so that the teeth on the toothed gear 290 completely avoid the teeth on the rack 281. Then the second electric telescopic rod 270 shortens, so that the baffle 260 resets. At this time, the drainage tube 111 will not be reduced in patency due to pressure. When the peristaltic drainage mechanism 200 needs to run again, the first electric telescopic rod 280 shortens. Since the baffle 260 previously drove the teeth of the toothed gear 290 to completely avoid the rack 281, the shortening of the first electric telescopic rod 280 is not interfered with.

[0053] Among the optional methods in this embodiment, the more preferred one is:

[0054] The negative pressure drainage mechanism 300 also includes a cone head 332 that slides vertically on the upper part of the cone hole 120. When the cone head 332 is pulled out of the cone hole 120 and the negative pressure pump 310 is not running, the drainage bottle 110 is in a gravity drainage state. When the cone head 332 is inserted into the cone hole 120 and the negative pressure pump 310 is running, the drainage bottle 110 is in a negative pressure drainage state.

[0055] When negative pressure drainage is needed, the cone head 332 moves toward the cone hole 120 and is inserted into the cone hole 120. At this time, the negative pressure pump 310 runs, so that the negative pressure will not leak from the cone hole 120 but will be released through the drainage tube 111 and the body fluid will be extracted.

[0056] Among the optional methods in this embodiment, the more preferred one is:

[0057] A pressure-transmitting tube 331 is connected to the cone head 332. A cylinder 330 is connected to the top of the pressure-transmitting tube 331. A circular plate 340 is slidably connected inside the cylinder 330. A first spring 341 is connected between the circular plate 340 and the bottom wall of the cylinder 330. When the negative pressure inside the drainage bottle 110 increases, the circular plate 340 moves down, thereby reducing the negative pressure intensity inside the drainage bottle 110.

[0058] During the operation of the negative pressure pump 310, if the negative pressure intensity is too high, the negative pressure is transmitted to the cylinder 330, causing the circular plate 340 to slide down against the negative pressure of the first spring 341, thereby preventing the negative pressure intensity in the drainage bottle 110 from being too high and damaging human tissue.

[0059] Among the optional methods in this embodiment, the more preferred one is:

[0060] A displacement sensor 350 is installed inside the cylinder 330. When the negative pressure pump 310 is running alone, the displacement sensor 350 detects that the speed of the negative pressure pump 310 decreases when the circular plate 340 moves downward, and the speed of the negative pressure pump 310 recovers after the circular plate 340 moves upward.

[0061] The displacement sensor 350 detects the operating status of the circular plate 340. When the circular plate 340 moves downward, it indicates that the negative pressure intensity of the drainage bottle 110 is too high. At this time, the system controls the speed of the negative pressure pump 310 to reduce the speed to prevent the negative pressure intensity from increasing rapidly. When the circular plate 340 moves upward, the system controls the negative pressure pump 310 to resume its speed and continue drainage.

[0062] Among the optional methods in this embodiment, the more preferred one is:

[0063] A rod 360 is fixedly connected to the side wall of the cylinder 330, and a tube 361 is fixedly connected to the top wall of the drainage bottle 110. When the negative pressure pump 310 is running, the rod 360 can slide into the tube 361, so that the cone 332 is inserted into the cone hole 120.

[0064] The cooperation between the insertion rod 360 and the insertion tube 361 allows the cylinder 330 to move only vertically up and down, restricting the trajectory of the cone 332. When the insertion rod 360 slides down onto the insertion tube 361, the cylinder 330 drives the cone 332 to move down synchronously, completing the sealing of the drainage bottle 110.

[0065] Among the optional methods in this embodiment, the more preferred one is:

[0066] A second spring 362 is connected between the insert 361 and the insert rod 360. A pressure pipe 363 is connected between the insert 361 and the negative pressure pipe 320. When the negative pressure pump 310 is running, it can transmit pressure to the insert 361 through the pressure pipe 363, so that the insert rod 360 applies pressure to the second spring 362.

[0067] When the negative pressure pump 310 is running, it can transmit negative pressure to the insert 361 through the pressure tube 363. At this time, the negative pressure acts on the insert rod 360, causing the insert rod 360 to slide down against the elastic force of the second spring 362. Then, the cone head 332 slides down and is inserted into the cone hole 120 at the top of the drainage bottle 110. When the negative pressure pump 310 stops running, the second spring 362 pushes the insert rod 360 upward, causing the cone head 332 to be pulled out of the cone hole 120.

[0068] Among the optional methods in this embodiment, the more preferred one is:

[0069] A third electric telescopic rod 370 is fixedly connected inside the drainage bottle 110. A support cylinder 380 is fixedly connected to the output end of the third electric telescopic rod 370. The support cylinder 380 is inserted into the drainage tube 111. A pressure sensor is installed on the drainage tube 111. When the rotating shaft 220 rotates and the negative pressure pump 310 runs, if the negative pressure intensity inside the drainage tube 111 increases, the third electric telescopic rod 370 will reciprocate and extend with the rotation of the rotating shaft 220. The support cylinder 380 can avoid the squeezing of the rotating roller 240 and open the pressure part of the drainage tube 111.

[0070] When the negative pressure drainage mechanism 300 is running alone, after the second electric telescopic rod 270 extends and then shortens, the third electric telescopic rod 370 extends, so that the support cylinder 380 is pushed into the drainage tube 111, thereby ensuring that the part of the drainage tube 111 pressed by the rotating roller 240 can be supported.

[0071] When the peristaltic drainage mechanism 200 and the negative pressure drainage mechanism 300 operate synchronously to generate pulse negative pressure, the third electric telescopic rod 370 reciprocates as the rotating shaft 220 rotates. When the rotating shaft 220 rotates so that the rotating roller 240 just avoids the drainage tube 111, the third electric telescopic rod 370 quickly extends, and the support cylinder 380 is inserted into the drainage tube 111, causing the drainage tube 111 to be opened. As the rotating shaft 220 rotates, when the rotating roller 240 approaches again and is about to apply pressure to the drainage tube 111, the third electric telescopic rod 370 quickly shortens, and the support cylinder 380 is pulled out of the drainage tube 111, so that the rotating roller 240 can press the drainage tube 111 again to apply pressure.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A post-operative drainage device, characterized by: The gravity drainage mechanism (100), the peristalsis drainage mechanism (200) and the negative pressure drainage mechanism (300) are included. The gravity drainage mechanism (100) includes a drainage bottle (110), the drainage bottle (110) is communicated with a drainage tube (111), and a top wall is provided with a tapered hole (120). The peristalsis drainage mechanism (200) is arranged on the drainage bottle (110) and is used for pressing the drainage tube (111) to generate a drainage negative pressure. The negative pressure drainage mechanism (300) is arranged on the drainage bottle (110) and includes a negative pressure tube (320) communicated with the drainage bottle (110) and a negative pressure pump (310) arranged on the negative pressure tube (320), when the negative pressure pump (310) operates, the tapered hole (120) is in a blocked state. When the gravity drainage mechanism (100) operates, the peristalsis drainage mechanism (200) and the negative pressure drainage mechanism (300) stop operating, and when the gravity drainage mechanism (100) stops operating, the peristalsis drainage mechanism (200) and / or the negative pressure drainage mechanism (300) operates. When the negative pressure in the drainage tube (111) increases, the peristalsis drainage mechanism (200) and the negative pressure drainage mechanism (300) operate synchronously to generate a pulse negative pressure.

2. The post-operative drainage device of claim 1, wherein: The gravity drainage mechanism (100) includes a rotating shaft (220) fixedly rotating on the drainage bottle (110), three rotating rollers (240) are annularly arranged on the rotating shaft (220), a baffle (260) is arranged on the drainage bottle (110), the drainage tube (111) is located between the rotating rollers (240) and the baffle (260), when the rotating shaft (220) rotates, the three rotating rollers (240) alternately press the drainage tube (111) to apply a negative pressure power to the drainage tube (111).

3. The post-operative drainage device of claim 2, wherein: The end of the rotating shaft (220) is fixedly connected with a toothless gear (290), and three sets of teeth corresponding to the three rotating rollers (240) are arranged on the toothless gear (290). The baffle (260) is fixedly connected with a first electric telescopic rod (280), the output end of the first electric telescopic rod (280) is fixedly connected with a rack (281), when the rotating shaft (220) stops rotating, the first electric telescopic rod (280) is elongated, and when one of the rotating rollers (240) presses the drainage tube (111), the rack (281) can be engaged with the corresponding teeth, so that the rotating roller (240) can avoid the drainage tube (111), and when the rotating roller (240) stops rotating and the three rotating rollers (240) all avoid the drainage tube (111), the rack (281) is not engaged with any tooth when it is elongated.

4. The post-operative drainage device of claim 3, wherein: The drainage bottle (110) is fixedly connected with a second electric telescopic rod (270), and an output end of the second electric telescopic rod (270) is fixedly connected to the baffle (260). After the first electric telescopic rod (280) is fully extended, the second electric telescopic rod (270) is first extended and then shortened, so that the rotating roller (240) can push the rotating shaft (220) to rotate, and the teeth on the toothless gear (290) are away from the rack (281).

5. The post-operative drainage device of claim 4, wherein: The negative pressure drainage mechanism (300) further comprises a cone head (332) vertically sliding on the upper part of the taper hole (120). When the cone head (332) is pulled out of the taper hole (120) and the negative pressure pump (310) is not running, the drainage bottle (110) is in a gravity drainage state. When the cone head (332) is inserted into the taper hole (120) and the negative pressure pump (310) is running, the drainage bottle (110) is in a negative pressure drainage state.

6. The post-operative drainage device of claim 5, wherein: The cone head (332) is communicated with a pressure transmission pipe (331), the top of the pressure transmission pipe (331) is communicated with a cylinder (330), the cylinder (330) is slidingly connected with a circular plate (340), the circular plate (340) and the bottom wall of the cylinder (330) are connected with a first spring (341), and when the negative pressure in the drainage bottle (110) increases, the circular plate (340) moves downward, thereby reducing the negative pressure intensity in the drainage bottle (110).

7. The post-operative drainage device of claim 6, wherein: The cylinder (330) is provided with a displacement sensor (350). In the separate running state of the negative pressure pump (310), when the displacement sensor (350) detects that the circular plate (340) moves downward, the rotating speed of the negative pressure pump (310) is reduced, and after the circular plate (340) moves upward, the rotating speed of the negative pressure pump (310) is restored.

8. The post-operative drainage device of claim 7, wherein: The side wall of the cylinder (330) is fixedly connected with a plug rod (360), the top wall of the drainage bottle (110) is fixedly connected with a plug cylinder (361), and when the negative pressure pump (310) is running, the plug rod (360) can slide into the plug cylinder (361), so that the cone head (332) is inserted into the taper hole (120).

9. The post-operative drainage device of claim 8, wherein: The plug cylinder (361) and the plug rod (360) are connected with a second spring (362), the plug cylinder (361) and the negative pressure pipe (320) are communicated with a pressure pipe (363), and the negative pressure pump (310) can transmit pressure to the plug cylinder (361) through the pressure pipe (363) when running, so that the plug rod (360) presses the second spring (362).

10. The post-operative drainage device of claim 9, wherein: A third electric telescopic rod (370) is fixedly connected in the drainage bottle (110), an output end of the third electric telescopic rod (370) is fixedly connected with a supporting cylinder (380), and the supporting cylinder (380) is inserted into the drainage tube (111). The drainage tube (111) is provided with an air pressure sensor. When the rotating shaft (220) rotates and the negative pressure pump (310) operates, if the negative pressure intensity in the drainage tube (111) increases, the third electric telescopic rod (370) reciprocates and telescopes with the rotation of the rotating shaft (220), and the supporting cylinder (380) can avoid the extrusion of the rotating roller (240) and support the compressed part of the drainage tube (111).

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