Drainage device with pressure adjusting function

Abstract

The invention relates to the technical field of medical instruments, in particular to a drainage device with a pressure adjusting function, which comprises a negative pressure aspirator and a drainage tube, the output end of the negative pressure aspirator is communicated with a collecting tank for collecting effusion, the drainage tube comprises a contact tube, a first branch tube and a second branch tube, and the contact tube is used for sucking the effusion in the body; the first branch pipe is communicated with the negative pressure aspirator, the second branch pipe is provided with a driving mechanism used for adjusting the drainage amount in the second branch pipe, and the end, away from the contact pipe, of the second branch pipe is communicated with the collecting tank; a first flow velocity sensor used for detecting the first flow velocity in the first branch pipe is communicated with the interior of the first branch pipe, and a second flow velocity sensor used for detecting the second flow velocity in the second branch pipe is communicated with the interior of the second branch pipe. The controller is used for controlling and adjusting the driving mechanism and the negative pressure aspirator based on the first flow rate and the second flow rate; the drainage device is used for guaranteeing continuous adjustment and control of the drainage amount, and replacement of the connection condition of the drainage tube is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a drainage device with a pressure regulation function. Background Art

[0002] A negative pressure drainer is a device that promotes wound healing and prevents infection by using the principle of negative pressure suction to extract liquid or gas from a wound, and is widely used in fields such as breast surgery, trauma care, and thoracic and abdominal drainage.

[0003] During the drainage process, the negative pressure is usually adjusted to create an environment lower than atmospheric pressure to adsorb substances in the body. In clinical applications, the negative pressure is adjusted according to different surgical methods; for example, after breast tumor surgery, high negative pressure is beneficial for the healing of the incision skin flap, and low negative pressure drainage is required for shaping during breast reconstruction surgery; in closed thoracic drainage, if the negative pressure is too high, the lungs may not fully expand after contraction, affecting gas discharge and lung re-expansion; and under normal circumstances, if the pressure is insufficient, it may lead to unsmooth liquid drainage, accumulation in the wound, increasing the risk of infection and delaying wound healing.

[0004] In the prior art, the drainage volume can be intelligently adjusted through digital monitoring. For example, a patent with the Chinese patent publication number CN115957386A discloses a smart drainage device for pleural effusion, which can adjust the gas pressure according to the measurement results of a pressure sensor for different patients due to their different physical conditions and tolerances. However, changes in body position, pressure sensor failures, or damage to the negative pressure regulator of the drainage tube may cause unstable output pressure, affecting actual use and resulting in unsmooth drainage or over-drainage; in addition, when the drainage tube is severely blocked or the collection tank needs to be replaced, the connection to the negative pressure generator or the collection tank needs to be cut off, which is cumbersome to operate and brings inconvenience in use. Therefore, the present invention provides a drainage device with a pressure regulation function to ensure continuous adjustment and control of the drainage volume and facilitate the replacement of the drainage tube connection. Summary of the Invention

[0005] To solve the above problems, the present invention provides a drainage device with a pressure regulation function, which is used to ensure continuous adjustment and control of the drainage volume and facilitate the replacement of the drainage tube connection.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A drainage device with a pressure regulating function, including a negative pressure aspirator and a drainage tube. The output end of the negative pressure aspirator is connected to the drainage tube, and a collection tank for collecting effusion is connected to the output end of the negative pressure aspirator; the negative pressure aspirator is used for continuous negative pressure suction, and the negative pressure aspirator is electrically connected to a controller for regulating the negative pressure suction; the drainage tube includes a contact tube, a first branch tube and a second branch tube. The contact tube is used for sucking the internal effusion of the body, and the contact tube is respectively connected to the first branch tube and the second branch tube;

[0007] One end of the first branch tube away from the contact tube is connected to the negative pressure aspirator. A driving mechanism for regulating the amount of internal drainage in the second branch tube is provided on the second branch tube. The driving mechanism is electrically connected to the controller, and the end of the second branch tube away from the contact tube is connected to the collection tank;

[0008] A first flow rate sensor for detecting the first flow rate in the first branch tube is connected to the first branch tube, and a second flow rate sensor for detecting the second flow rate in the second branch tube is connected to the second branch tube; the controller is used for controlling and regulating the driving mechanism and the negative pressure aspirator based on the first flow rate and the second flow rate.

[0009] Further, the driving mechanism includes a housing and a motor. The motor is fixedly connected to the housing, the output shaft of the motor is rotationally matched with the center of the housing, a placement groove is opened in the housing, and the second branch tube is located in the placement groove;

[0010] A plurality of connecting shafts are fixedly connected to the output shaft of the motor, and a pressing block is rotationally matched on the connecting shaft. The second branch tube is located between the pressing block and the housing.

[0011] Further, a transfer block is provided at the connection of the first branch tube and the second branch tube with the contact tube. A partition is slidably matched in the transfer block. A switch is fixedly connected to the partition. A circuit connecting the power supply is fixedly connected to one side of the transfer block close to the partition. The circuit is electrically connected to the controller, and the positions of the circuit and the switch are on the same straight line; the switch is electrically connected to a first solenoid valve. The first solenoid valve is connected to the first branch tube. The first solenoid valve is electrically connected to the controller and is also electrically connected to the circuit;

[0012] The partition is located above the connection of the first branch tube and the second branch tube with the contact tube. A tension spring for driving the partition to reset is provided at the top of the partition; a shielding plate for closing the second branch tube is fixedly connected to the bottom of the partition, and the side of the partition away from the shielding plate is communicated with the outside atmosphere;

[0013] When the inside of the transfer block is in a negative pressure state, the partition is squeezed by the external atmospheric pressure to close the second branch tube, and the switch is separated from the circuit; when the first branch tube is blocked and the pressure in the transfer block is at normal pressure, the accumulated liquid pressure in the transfer block squeezes and pushes the partition to move upward, the second branch tube is communicated with the transfer block, and the switch is connected to the circuit.

[0014] Further, an adjusting rod is fixedly connected to the top of the partition plate, and the tension spring is sleeved on the pressure regulating rod; one end of the pressure regulating rod away from the partition plate is fixedly connected with a button, and the button is electrically connected to the first electromagnetic valve, and the button is used to control the first electromagnetic valve to work.

[0015] Further, an air pipe communicating with the outside is opened on the adjusting rod, the other end of the air pipe communicates with the inside of the transfer block, and a second electromagnetic valve is communicated with the air pipe, and the second electromagnetic valve is electrically connected to the controller and the button.

[0016] Further, the controller is also used to input and store the execution pressure instruction of the current time. The execution pressure instruction includes the first standard flow rate corresponding to the first branch pipe and the second standard flow rate corresponding to the second branch pipe; compare the first flow rate with the first standard flow rate based on the execution pressure instruction. If the first flow rate at the current time is greater than the first standard flow rate, a power reduction instruction is sent to the negative pressure aspirator, and a standby instruction is sent to the first electromagnetic valve and the second electromagnetic valve;

[0017] If the first flow rate at the current time is less than the first standard flow rate, the flow rate difference before and after the current time is calculated based on the first flow rate before and after the current time, and the flow rate difference is compared with the set rated value. If the flow rate difference is greater than the rated value, a start instruction is sent to the first electromagnetic valve and the second electromagnetic valve, and a start instruction is sent to the drive mechanism based on the second standard flow rate; if the flow rate difference is less than the rated value, a power increase instruction is sent to the negative pressure aspirator, and a standby instruction is sent to the first electromagnetic valve and the second electromagnetic valve.

[0018] Further, it further includes a cleaning tank for storing physiological saline, and the cleaning tank is communicated with a cleaning mechanism for cleaning the accumulated liquid inside the first branch pipe;

[0019] The cleaning mechanism includes a water pump for pumping physiological saline. The water pump is electrically connected to the controller. The output end of the water pump is communicated with a water pipe, and the end of the water pipe away from the water pump is communicated with the first branch pipe; the controller is also used to send a start instruction to the water pump when the flow rate difference is less than the rated value.

[0020] Further, both the first branch pipe and the second branch pipe are deformable hoses, and the cleaning mechanism further includes a fitting block located above the first branch pipe;

[0021] A fitting cavity is opened in the fitting block. An inlet pipe and a return pipe are communicated between the fitting block and the cleaning tank. A central plate for dividing the fitting cavity is fixedly connected to the center of the fitting block; the side of the fitting block away from the inlet pipe is communicated with the water pipe, and a negative pressure pipe is also communicated with the side of the fitting block close to the water pipe. The end of the negative pressure pipe away from the fitting block is communicated with the negative pressure aspirator;

[0022] A through hole is opened at the center of the center plate, a rotating block is arranged in the through hole, both ends of the rotating block are provided with card slots, and a placement slot corresponding to the card slot is opened on the center plate; and the inlet pipe and the return pipe are arranged symmetrically with the center plate, and the water pipe and the negative pressure pipe are arranged symmetrically with the center plate as the center;

[0023] A slider is slidably matched in the matching cavity, the slider is located between the water pipe and the negative pressure pipe, and the slider is located below the rotating block; a spring is also provided between the slider and the negative pressure pipe, one end of the spring is fixedly connected to the slider, and the other end of the spring is fixedly connected to the transfer block;

[0024] When the first branch pipe is in a negative pressure adsorption state, the spring is in a normal state, the slider is located on the side of the center plate close to the water pipe, and the rotating block closes the through hole on the center plate; when the first branch pipe is in a blocked state, the spring is in a compressed state, the slider is located on the side of the center plate close to the negative pressure pipe, the two ends of the rotating block are against the upper and lower sides of the transfer block, the rotating block is used to separate the water pipe from the negative pressure pipe, and the water pipe is connected to the inlet pipe.

[0025] Furthermore, the placement groove on the center plate near the inlet pipe side is used to prevent the rotating block from moving toward the inlet pipe side, and the placement groove on the center plate near the return pipe side is used to prevent the rotating block from moving toward the return pipe side.

[0026] Furthermore, the controller is also used to obtain a first execution flow rate and a second execution flow rate corresponding to the power adjustment when performing power adjustment, the controller sends a start instruction to the solenoid valve, calculates the execution difference between the first flow rate at the current time and the first execution flow rate, and then compares the execution difference with the set stable value;

[0027] If the execution difference is less than the stable value, a direct power adjustment instruction is sent to the negative pressure suction device;

[0028] If the execution difference is greater than the stable value, a start command is first sent to the second solenoid valve, and a start command is sent to the driving mechanism based on the second execution flow rate, and then a power slow adjustment command is sent to the negative pressure suction device, and a start command is sent to the first solenoid valve until the first flow rate is equal to the first execution flow rate; when the first flow rate is equal to the first execution flow rate, a closing command is sent to the first solenoid valve, and a closing command is sent to the driving mechanism.

[0029] The above scheme has the following beneficial effects:

[0030] 1. In this solution, during the drainage process, the first branch pipe and the second branch pipe are connected to facilitate flexible switching during the cleaning of the blocked pipe or the communication of the collection tank for collecting the accumulated fluid, so as to ensure continuous drainage and improve work efficiency.

[0031] 2. In this solution, during the pressure regulation process, when adjusting the pressure based on the connection situation through the first flow rate and the second flow rate, the flexible switching characteristics of the first branch pipe and the second branch pipe are utilized to ensure the stable control of the pressure regulation, thereby improving the stability of the pressure regulation.

[0032] 3. In this solution, through the switching of the first branch pipe and the second branch pipe, during the power regulation process, the inside of the first branch pipe can be cleaned to reduce the possible impurities attached to the inside of the first branch pipe and ensure smoothness; also, whether the flow rate change inside the first branch pipe reaches the predetermined negative pressure regulation control can be used to ensure the stability of the drainage effect.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Isometric view of an embodiment of the drainage device with pressure regulation function of the present invention;

[0035] Figure 2 Top view of an embodiment of the drainage device with pressure regulation function of the present invention;

[0036] Figure 3 Front view of an embodiment of the drainage device with pressure regulation function of the present invention;

[0037] Figure 4 Is Figure 2 Schematic cross-sectional view taken along line A-A in

[0038] Figure 5 Is Figure 2 Schematic cross-sectional view taken along line B-B in

[0039] Figure 6 Is Figure 3 Schematic cross-sectional view taken along line D-D in

[0040] Figure 7 Is Figure 5 Enlarged schematic view of local part E in

[0041] Figure 8 Is Figure 5 Enlarged schematic view of local part F in

[0042] The reference numerals in the accompanying drawings of the specification include: 1, contact pipe; 11, first branch pipe; 12, second branch pipe; 2, mating block; 21, water pipe; 23, inlet pipe; 24, return pipe; 25, negative pressure pipe; 26, check valve; 27, central plate; 3, drive mechanism; 31, motor; 32, connecting shaft; 33, pressing block; 4, transfer block; 41, partition plate; 42, adjusting rod; 43, baffle plate; 44, switch; 46, button; 5, first solenoid valve; 6, slider; 61, spring; 62, rotating block. Detailed implementation manners

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] The following is further detailed through specific implementation manners:

[0047] Embodiment 1:

[0048] As shown in the appendix Figures 1 to 8As shown: A drainage device with a pressure regulating function, including a negative pressure aspirator and a drainage tube. The output end of the negative pressure aspirator is connected to the drainage tube, and a collection tank (not shown in the figure) for collecting effusion is connected to the output end of the negative pressure aspirator; the negative pressure aspirator is used for continuous negative pressure suction, and the negative pressure aspirator is electrically connected to a controller for adjusting the negative pressure suction. Both the negative pressure aspirator and the controller belong to the prior art and will not be elaborated in this embodiment; the drainage tube includes a contact tube 1, a first branch tube 11, and a second branch tube 12. The contact tube 1 is used for sucking the effusion in the body, and the diameter of the contact tube 1 is larger than that of the first branch tube 11 and the second branch tube 12. The contact tube 1 is respectively connected to the first branch tube 11 and the second branch tube 12.

[0049] One end of the first branch tube 11 away from the contact tube 1 is connected to the negative pressure aspirator. A driving mechanism 3 for adjusting the amount of drainage inside the second branch tube 12 is provided on the second branch tube 12. The driving mechanism 3 is electrically connected to the controller. One end of the second branch tube 12 away from the contact tube 1 is connected to the collection tank. The driving mechanism 3 includes a housing and a motor 31. The motor 31 is fixedly connected to the housing. The output shaft of the motor 31 is rotationally matched with the center of the housing. A placement groove is opened inside the housing, and the second branch tube 12 is located in the placement groove; a plurality of connecting shafts 32 are fixedly connected to the output shaft of the motor 31, and a pressing block 33 is rotationally matched on the connecting shaft 32. The second branch tube 12 is located between the pressing block 33 and the housing.

[0050] At the connection of the first branch tube 11 and the second branch tube 12 with the contact tube 1, there is a transfer block 4. A partition 41 is slidably matched inside the transfer block 4. A switch 44 is fixedly connected to the partition 41. One side of the transfer block 4 close to the partition 41 is fixedly connected with a circuit connected to the power supply. The circuit is electrically connected to the controller, and the position of the circuit and the switch 44 is on the same straight line; the switch 44 is electrically connected to a first solenoid valve 5. The first solenoid valve 5 is normally in an open state. The first solenoid valve 5 is connected to the first branch tube 11. The first solenoid valve 5 is electrically connected to the controller and is also electrically connected to the circuit; the partition 41 is located above the connection of the first branch tube 11 and the second branch tube 12 with the contact tube 1. A tension spring for driving the partition 41 to reset is provided at the top of the partition 41, and the other end of the tension spring is fixedly connected to the transfer block 4; a shielding plate 43 for closing the second branch tube 12 is fixedly connected to the bottom of the partition 41. The side of the partition 41 away from the shielding plate 43 is communicated with the outside atmosphere; when the inside of the transfer block 4 is in a negative pressure state, the partition 41 is squeezed by the external atmospheric pressure to close the second branch tube 12, and the switch 44 is separated from the circuit; when the first branch tube 11 is blocked and the pressure inside the transfer block 4 is at normal pressure, the accumulated liquid pressure inside the transfer block 4 squeezes and pushes the partition 41 to move upward, the second branch tube 12 is communicated with the transfer block 4, and the switch 44 is connected to the circuit.

[0051] A first flow velocity sensor (not shown in the figure) for detecting the first flow velocity in the first branch pipe 11 is connected to the inside of the first branch pipe 11, and a second flow velocity sensor (not shown in the figure) for detecting the second flow velocity in the second branch pipe 12 is connected to the inside of the second branch pipe 12; the controller is used to control and adjust the driving mechanism 3 and the negative pressure aspirator based on the first flow velocity and the second flow velocity.

[0052] The specific implementation process is as follows:

[0053] First, connect the first branch pipe 11 to the negative pressure aspirator and connect the second branch pipe 12 to the collection tank. Under normal conditions, the drainage process is carried out by directly adjusting the negative pressure power of the negative pressure aspirator, so that the liquid accumulation in the first branch pipe 11 flows into the collection tank connected to the output end of the negative pressure aspirator. During the drainage process of the second branch pipe 12, the connecting shaft 32 is driven to rotate by the motor 31, so that the pressing block 33 on the connecting shaft 32 continuously moves in the placement groove. When the pressing block 33 abuts against the second branch pipe 12, the continuously rotating pressing block 33 is used to squeeze and push the second branch pipe 12 to increase the liquid pressure inside the second branch pipe 12 during the current contact process, thereby realizing continuous suction of the liquid accumulation.

[0054] During the drainage process, due to the pressure change caused by the blockage condition of the first branch pipe 11, the pressure difference between the pressure inside the transfer block 4 and the external atmospheric pressure changes; when the first branch pipe 11 remains unblocked, the inside of the transfer block 4 is in a low-pressure or negative-pressure state, and the external atmospheric pressure is greater than the pressure inside the transfer block 4. The pressure difference is used to keep pushing the partition plate 41, so that the shielding plate 43 on the partition plate 41 closes the second branch pipe 12.

[0055] When the first branch pipe 11 is blocked, the pressure inside the transfer block 4 gradually increases. At this time, the tension spring is no longer pushed by the external atmospheric pressure, so that the tension spring drives the partition plate 41 to reset. The partition plate 41 drives the shielding plate 43 to open the second branch pipe 12. At the same time, the switch 44 on the partition plate 41 is connected to the circuit, so that the first solenoid valve 5 is connected to the power supply through the circuit to close the first branch pipe 11. At the same time, the driving mechanism 3 is started through the controller to continuously transport the liquid accumulation inside the contact pipe 1 by pushing the inside of the second branch pipe 12 with the pressing block 33 to ensure the continuous progress of the drainage.

[0056] During the pressure adjustment process, in the pressure adjustment of the connection situation through the first flow velocity and the second flow velocity, the characteristics of the flexible switching between the first branch pipe 11 and the second branch pipe 12 are used to ensure the stable control of the pressure adjustment, thereby improving the stability of the pressure adjustment. The switching function of the first branch pipe 11 and the second branch pipe 12 is used to facilitate the replacement of the connection situation of the drainage pipe at the same time.

[0057] Embodiment 2:

[0058] The difference from Embodiment 1 is that an adjusting rod 42 is fixedly connected to the top of the partition plate 41, and the tension spring is sleeved on the pressure regulating rod; one end of the pressure regulating rod away from the partition plate 41 is fixedly connected with a button 46, and the button 46 is electrically connected to the first electromagnetic valve 5. The button 46 is used to control the operation of the first electromagnetic valve 5. In this embodiment, the controller, the button 46 and the switch 44 are on different wire lines.

[0059] An air pipe communicating with the outside is opened on the adjusting rod 42, and the other end of the air pipe is internally communicated with the transfer block 4. A second electromagnetic valve is communicated with the air pipe, and the normal state of the second electromagnetic valve is normally closed. The second electromagnetic valve is electrically connected to the controller and the button 46.

[0060] The specific implementation process is as follows: During use, the partition plate 41 can be manually pushed by the pressure regulating rod to move, so as to independently open the communication between the second branch pipe 12 and the contact pipe 1. At the same time, the first electromagnetic valve 5 is actively controlled to start through the button 46 on the pressure regulating rod, so as to control the communication of the first branch pipe 11, which is convenient for manual adjustment and replacement cleaning of the first branch pipe 11 according to the actual needs during use, so as to improve the convenience during use.

[0061] The opening and closing of the air pipe are controlled by the controller and the button 46. When the air pipe is opened, the outside air actively enters the inside of the transfer block 4, so that the air pressure inside the transfer block 4 is balanced with the outside, so as to quickly drive the partition plate 41 to reset through the tension spring.

[0062] Embodiment 3:

[0063] The difference from Embodiment 2 is that the controller is also used to input and store the execution pressure instruction of the current time. The execution pressure instruction includes the first standard flow rate corresponding to the first branch pipe 11 and the second standard flow rate corresponding to the second branch pipe 12; based on the execution pressure instruction, the first flow rate is compared with the first standard flow rate. If the first flow rate at the current time is greater than the first standard flow rate, a power reduction instruction is sent to the negative pressure aspirator, and a standby instruction is sent to the first electromagnetic valve 5 and the second electromagnetic valve.

[0064] If the first flow rate at the current time is less than the first standard flow rate, the flow rate difference before and after the current time is calculated based on the first flow rate before and after the current time, and the flow rate difference is compared with the set rated value. If the flow rate difference is greater than the rated value, a start instruction is sent to the first electromagnetic valve 5 and the second electromagnetic valve, and a start instruction is sent to the drive mechanism 3 based on the second standard flow rate; if the flow rate difference is less than the rated value, a power increase instruction is sent to the negative pressure aspirator, and a standby instruction is sent to the first electromagnetic valve 5 and the second electromagnetic valve.

[0065] For example, the execution pressure of the current time is input through the controller to obtain corresponding first and second standard flow rates for active adjustment. In the first branch pipe 11, the first flow rate is compared with the first standard flow rate to actively adjust the power of the negative pressure aspirator based on the first flow rate to maintain the stability of the negative pressure. For the first branch pipe 11 where the first flow rate is lower than the first standard flow rate, at this time, blockage may occur in the first branch pipe 11 or there may be impurities such as large tissue masses and blood clots in the accumulated liquid inside the first branch pipe 11. The power of adsorption is increased for the impurities to ensure the smoothness of the first branch pipe 11. For the possible blockage situation, the way of switching the connecting pipe at the current time is adopted, and the second branch pipe 12 is used for continuous pushing to reduce the risk of blockage during transportation and ensure the continuous progress of drainage.

[0066] Embodiment 4:

[0067] The difference from Embodiment 3 is that it further includes a cleaning tank (not shown in the figure) for storing physiological saline, and a cleaning mechanism for cleaning the accumulated liquid inside the first branch pipe 11 is connected to the cleaning tank; the cleaning mechanism includes a water pump for pumping physiological saline, the water pump is electrically connected to the controller, the output end of the water pump is connected to a water pipe 21, and the end of the water pipe 21 far from the water pump is connected to the first branch pipe 11; the controller is further configured to send a start command to the water pump when the flow rate difference is less than the rated value.

[0068] Both the first branch pipe 11 and the second branch pipe 12 are deformable hoses. The cleaning mechanism further includes a fitting block 2, and the fitting block 2 is located above the first branch pipe 11; a fitting cavity is formed in the fitting block 2, and a flow inlet pipe 23 and a return pipe 24 are connected between the fitting block 2 and the cleaning tank. A central plate 27 for dividing the fitting cavity is fixedly connected to the center of the fitting block 2; the side of the fitting block 2 far from the flow inlet pipe 23 is connected to the water pipe 21, and a negative pressure pipe 25 is also connected to the side of the fitting block 2 close to the water pipe 21. The end of the negative pressure pipe 25 far from the fitting block 2 is connected to the negative pressure aspirator. Check valves 26 are provided in both the flow inlet pipe 23 and the return pipe 24.

[0069] A through hole is provided at the center of the central plate 27. A rotating block 62 is arranged in the through hole. Clamping grooves are provided at both ends of the rotating block 62. Placing grooves corresponding to the clamping grooves are formed on the central plate 27. The inlet pipe 23 and the return pipe 24 are symmetrically arranged with respect to the central plate 27, and the water pipe 21 and the negative pressure pipe 25 are symmetrically arranged with respect to the central plate 27. A slider 6 is slidably fitted in the fitting cavity. The slider 6, the central plate 27 and the rotating block 62 form a closed mechanism. The slider 6 is located between the water pipe 21 and the negative pressure pipe 25 and below the rotating block 62. A spring 61 is further arranged between the slider 6 and the negative pressure pipe 25. One end of the spring 61 is fixedly connected to the slider 6, and the other end of the spring 61 is fixedly connected to the intermediate block 4. The placing groove on the central plate 27 near the inlet pipe 23 is used to prevent the rotating block 62 from moving towards the side close to the inlet pipe 23, and the placing groove on the central plate 27 near the return pipe 24 is used to prevent the rotating block 62 from moving towards the side close to the return pipe 24.

[0070] When the first branch pipe 11 is in the negative pressure adsorption state, the spring 61 is in the normal state. The slider 6 is located on the side of the central plate 27 close to the water pipe 21, and the rotating block 62 closes the through hole on the central plate 27. When the first branch pipe 11 is in the blocked state, the spring 61 is in the compressed state. The slider 6 is located on the side of the central plate 27 close to the negative pressure pipe 25. Both ends of the rotating block 62 abut against the upper and lower sides of the intermediate block 4. The rotating block 62 is used to cut off between the water pipe 21 and the negative pressure pipe 25, and the water pipe 21 communicates with the inlet pipe 23.

[0071] The specific implementation process is as follows: Start the water pump through the controller to pump physiological saline to clean the inside of the first branch pipe 11, so as to reduce the blockage inside the first branch pipe 11, maintain the continuous drainage, and thus improve the treatment efficiency.

[0072] In the normal state, both the water pipe 21 and the negative pressure pipe 25 are in the negative pressure state. At this time, the slider 6 is in the natural extension state, and the slider 6 keeps the limit on the rotating block 62, so that the high pressure of the inlet pipe 23 above the central plate 27 and the low pressure of the water pipe 21 below the central plate 27 cannot rotate naturally. When the first branch pipe 11 is in the blocked state, the pressure inside the water pipe 21 communicating with the first branch pipe 11 gradually increases, while the side of the slider 6 close to the negative pressure pipe 25 continues to maintain the negative pressure. The slider 6 moves towards the side close to the negative pressure pipe 25 (the right side in the figure) under the pressure difference between the water pipe 21 and the negative pressure pipe 25. The slider 6 pushes the spring 61 to produce an extrusion effect, which is convenient for the slider 6 to quickly reset when the pressure is restored later. Through the limiting effect of the placing groove, the rotating block 62 can only rotate in one direction, thus ensuring the stability of the movement of the rotating block 62 and ensuring the intermittent rotation of the rotating block 62.

[0073] Meanwhile, during the movement of the slider 6 towards the side of the negative pressure tube 25, when the slider 6 is restricted by the spring 61 and cannot move, at this time, the slider 6 abuts against the side of the rotating block 62 close to the negative pressure tube 25 to limit the flipping of the rotating block 62. The pressure above the slider 6 close to the inflow tube 23 is greater than the pressure below the slider 6 close to the water pipe 21. Utilizing the pressure difference, the rotating block 62 moves downward, enabling the inflow tube 23 to communicate with the water pipe 21 through the through hole on the central plate 27, so as to realize the entry of physiological saline into the first branch tube 11 for flushing to dredge the inside of the first branch tube 11. After the rotating block 62 rotates, it abuts against the upper and lower sides of the transfer block 4 to cut off the connection between the water pipe 21 and the negative pressure tube 25.

[0074] Since the slider 6 abuts against the side of the rotating block 62 close to the negative pressure tube 25 to limit the flipping of the rotating block 62, and the negative pressure tube 25 remains unobstructed under negative pressure. At this time, the lower end of the rotating block 62 abuts against the slider 6, and the side (left side) of the rotating block 62 close to the water pipe 21 is in a high-pressure state, while the side (right side) of the rotating block 62 close to the negative pressure tube 25 is in a low-pressure state. This causes the upper end of the rotating block 62 to rotate to the right due to the pressure difference, and the lower end of the rotating block 62 moves towards the end away from the slider 6. The inflow tube 23 and the water pipe 21 are temporarily connected to the negative pressure tube 25; the compressed spring 61 releases elastic force and pushes the rotating block 62 to move to the left, causing the rotating block 62 to temporarily close the central plate 27. As a result, physiological saline intermittently enters the first branch tube 11, forming an intermittent scouring effect. Compared with continuous scouring, the cleaning effect is improved to ensure the smoothness inside the first branch tube 11.

[0075] Embodiment 5:

[0076] The difference from Embodiment 4 is that when performing power adjustment, the controller is further configured to obtain the first execution flow rate and the second execution flow rate corresponding to the power adjustment. The controller sends a start command to the solenoid valve, calculates the execution difference between the first flow rate at the current time and the first execution flow rate, and then compares the execution difference with the set stable value.

[0077] If the execution difference is less than the stable value, a power direct adjustment command is sent to the negative pressure aspirator; if the execution difference is greater than the stable value, a start command is first sent to the second solenoid valve, and a start command is sent to the drive mechanism 3 based on the second execution flow rate. Then, a power slow adjustment command is sent to the negative pressure aspirator, and a start command is sent to the first solenoid valve 5 until the first flow rate is equal to the first execution flow rate; when the first flow rate is equal to the first execution flow rate, a close command is sent to the first solenoid valve 5, and a close command is sent to the drive mechanism 3.

[0078] For example, during the power adjustment process, through the switching between the first branch pipe 11 and the second branch pipe 12, taking the pipe connected at the current time as the first branch pipe 11 as an example, by converting the connected pipe of the contact pipe 1 to the second branch pipe 12, the power of the first branch pipe 11 is gradually increased, and the negative pressure suction of the second branch pipe 12 is quickly adjusted. It can not only clean the inside of the first branch pipe 11 to reduce the possible impurities attached to the inside of the first branch pipe 11 and ensure smoothness, but also adjust and control whether the flow rate change inside the first branch pipe 11 reaches the predetermined negative pressure to ensure the stability of the drainage effect.

[0079] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A drainage device with a pressure regulating function, comprising a negative pressure suction device and a drainage tube, wherein the output end of the negative pressure suction device is connected to the drainage tube, and the output end of the negative pressure suction device is connected to a collection tank for collecting effusion; the negative pressure suction device is used for continuous negative pressure suction, and the negative pressure suction device is electrically connected to a controller for adjusting the negative pressure suction; characterized in that: The drainage tube comprises a contact tube (1), a first branch tube (11) and a second branch tube (12); the contact tube (1) is used to absorb the accumulated fluid in the body, and the contact tube (1) is connected to the first branch tube (11) and the second branch tube (12) respectively; One end of the first branch tube (11) away from the contact tube (1) is connected to the negative pressure suction device, and the second branch tube (12) is provided with a driving mechanism (3) for adjusting the amount of drainage inside the second branch tube (12), the driving mechanism (3) is electrically connected to the controller, and one end of the second branch tube (12) away from the contact tube (1) is connected to the collection tank; The first branch pipe (11) is connected to a first flow rate sensor for detecting a first flow rate in the first branch pipe (11), and the second branch pipe (12) is connected to a second flow rate sensor for detecting a second flow rate in the second branch pipe (12); the controller is used to control and adjust the driving mechanism (3) and the negative pressure aspirator based on the first flow rate and the second flow rate.

2. The drainage device with pressure regulating function according to claim 1, characterized in that: The driving mechanism (3) comprises a housing and a motor (31), wherein the motor (31) is fixedly connected to the housing, and an output shaft of the motor (31) is rotatably matched with the center of the housing. A placement groove is provided in the housing, and the second branch pipe (12) is located in the placement groove. A plurality of connecting shafts (32) are fixedly connected to the output shaft of the motor (31), a pressing block (33) is rotatably fitted on the connecting shaft (32), and the second branch pipe (12) is located between the pressing block (33) and the housing.

3. The drainage device with pressure regulating function according to claim 2, characterized in that: A transfer block (4) is provided at the connection point between the first branch pipe (11) and the second branch pipe (12) and the contact pipe (1); a partition plate (41) is slidably fitted inside the transfer block (4); a switch (44) is fixedly connected to the partition plate (41); a circuit connected to a power supply is fixedly connected to one side of the transfer block (4) close to the partition plate (41); the circuit is electrically connected to a controller; the circuit and the switch (44) are located on the same straight line; the switch (44) is electrically connected to a first solenoid valve (5); the first solenoid valve (5) is connected to the first branch pipe (11); the first solenoid valve (5) is electrically connected to the controller; and the first solenoid valve (5) is electrically connected to the circuit; The partition (41) is located above the connection point between the first branch pipe (11) and the second branch pipe (12) and the contact pipe (1), and a tension spring for driving the partition (41) to return to its original position is provided at the top of the partition (41); a shielding plate (43) for closing the second branch pipe (12) is fixedly connected to the bottom of the partition (41), and a side of the partition (41) away from the shielding plate (43) is connected to the outside atmosphere; When the interior of the transfer block (4) is in a negative pressure state, the partition (41) is squeezed by the external atmospheric pressure to close the second branch pipe (12), and the switch (44) is separated from the line; when the first branch pipe (11) is blocked and the pressure inside the transfer block (4) is at normal pressure, the accumulated fluid inside the transfer block (4) is squeezed to push the partition (41) upward, the second branch pipe (12) is connected to the transfer block (4), and the switch (44) is connected to the line.

4. The drainage device with pressure regulating function according to claim 3, characterized in that: An adjusting rod (42) is fixedly connected to the top of the partition (41), and a tension spring is sleeved on the pressure adjusting rod; a button (46) is fixedly connected to one end of the pressure adjusting rod away from the partition (41), and the button (46) is electrically connected to the first solenoid valve (5), and the button (46) is used to control the first solenoid valve (5) to work.

5. The drainage device with pressure regulating function according to claim 4, characterized in that: The regulating rod (42) is provided with an air pipe connected to the outside, the other end of the air pipe is connected to the inside of the transfer block (4), the air pipe is connected to a second electromagnetic valve, and the second electromagnetic valve is electrically connected to the controller and the button (46).

6. The drainage device with pressure regulating function according to claim 5, characterized in that: The controller is also used to record and store the execution pressure instruction at the current time, the execution pressure instruction including the first standard flow rate corresponding to the first branch pipe (11) and the second standard flow rate corresponding to the second branch pipe (12); based on the execution pressure instruction, the first flow rate is compared with the first standard flow rate, and if the first flow rate at the current time is greater than the first standard flow rate, a power reduction instruction is sent to the negative pressure aspirator, and a standby instruction is sent to the first solenoid valve (5) and the second solenoid valve; If the first flow rate at the current time is less than the first standard flow rate, the flow rate difference before and after the current time is calculated based on the first flow rates before and after the current time, and the flow rate difference is compared with the set rated value. If the flow rate difference is greater than the rated value, a start instruction is sent to the first solenoid valve (5) and the second solenoid valve, and a start instruction is sent to the drive mechanism (3) based on the second standard flow rate; if the flow rate difference is less than the rated value, a power increase instruction is sent to the negative pressure suction device, and a standby instruction is sent to the first solenoid valve (5) and the second solenoid valve.

7. The drainage device with pressure regulating function according to claim 6, characterized in that: It also includes a cleaning tank for storing physiological saline, the cleaning tank being connected to a cleaning mechanism for cleaning the accumulated liquid inside the first branch pipe (11); The cleaning mechanism comprises a water pump for pumping physiological saline solution, the water pump is electrically connected to a controller, the output end of the water pump is connected to a water pipe (21), and the end of the water pipe (21) away from the water pump is connected to the first branch pipe (11); the controller is also used to send a start instruction to the water pump when the flow rate difference is less than a rated value.

8. The drainage device with pressure regulating function according to claim 7, characterized in that: The first branch pipe (11) and the second branch pipe (12) are both deformable hoses, and the cleaning mechanism further comprises a matching block (2), wherein the matching block (2) is located above the first branch pipe (11); A matching cavity is formed in the matching block (2); an inlet pipe (23) and a return pipe (24) are connected between the matching block (2) and the cleaning tank; a center plate (27) for dividing the matching cavity is fixedly connected at the center of the matching block (2); a side of the matching block (2) away from the inlet pipe (23) is connected to the water pipe (21); a side of the matching block (2) close to the water pipe (21) is also connected to a negative pressure pipe (25); and an end of the negative pressure pipe (25) away from the matching block (2) is connected to a negative pressure suction device; A through hole is formed at the center of the center plate (27), a rotating block (62) is provided in the through hole, both ends of the rotating block (62) are provided with a card slot, and a placement slot corresponding to the card slot is formed on the center plate (27); the inlet pipe (23) and the return pipe (24) are arranged symmetrically with the center plate (27), and the water pipe (21) and the negative pressure pipe (25) are arranged symmetrically with the center plate (27) as the center; A slider (6) is slidably matched in the matching cavity, the slider (6) is located between the water pipe (21) and the negative pressure pipe (25), and the slider (6) is located below the rotating block (62); a spring (61) is also provided between the slider (6) and the negative pressure pipe (25), one end of the spring (61) is fixedly connected to the slider (6), and the other end of the spring (61) is fixedly connected to the transfer block (4); When the first branch pipe (11) is in a negative pressure adsorption state, the spring (61) is in a normal state, the slider (6) is located on the side of the center plate (27) close to the water pipe (21), and the rotating block (62) closes the through hole on the center plate (27); when the first branch pipe (11) is in a blocked state, the spring (61) is in a compressed state, the slider (6) is located on the side of the center plate (27) close to the negative pressure pipe (25), the two ends of the rotating block (62) are against the upper and lower sides of the transfer block (4), the rotating block (62) is used to separate the water pipe (21) from the negative pressure pipe (25), and the water pipe (21) is connected to the inlet pipe (23).

9. The drainage device with pressure regulating function according to claim 8, characterized in that: The placement groove on the side of the center plate (27) close to the inlet pipe (23) is used to prevent the rotating block (62) from moving toward the side close to the inlet pipe (23), and the placement groove on the side of the center plate (27) close to the return pipe (24) is used to prevent the rotating block (62) from moving toward the side close to the return pipe (24).

10. The drainage device with pressure regulating function according to claim 9, characterized in that: The controller is also used to obtain a first execution flow rate and a second execution flow rate corresponding to the power adjustment when performing power adjustment, and the controller sends a start instruction to the solenoid valve, calculates the execution difference between the first flow rate at the current time and the first execution flow rate, and then compares the execution difference with the set stable value; If the execution difference is less than the stable value, a direct power adjustment instruction is sent to the negative pressure suction device; If the execution difference is greater than the stable value, a start command is first sent to the second solenoid valve, and a start command is sent to the drive mechanism (3) based on the second execution flow rate, and then a power slow adjustment command is sent to the negative pressure suction device, and a start command is sent to the first solenoid valve (5) until the first flow rate is equal to the first execution flow rate; when the first flow rate is equal to the first execution flow rate, a closing command is sent to the first solenoid valve (5), and a closing command is sent to the drive mechanism (3).

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