Medical liquid suction negative pressure device capable of monitoring liquid volume in real time
By introducing the liquid level sensing device and the automatic control system of the electronic control box into the medical liquid absorption negative pressure device, the problems of shaking of the liquid absorption tank and liquid overflow are solved, real-time liquid volume monitoring and negative pressure stability are achieved, and the device is improved Portability and safety of use.
Patent Information
- Application Number
- CN202323037358.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-09
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-11-09
AI Technical Summary
The existing medical negative pressure device for absorbing liquid can easily cause the liquid aspiration tank to shake when the patient moves, affecting the air tightness of the interface tube, and failing to monitor the liquid volume in real time, resulting in negative pressure instability and liquid overflow problems.
A medical liquid absorbing negative pressure device for real-time monitoring of liquid volume is designed, and the liquid level sensing device is used to connect it to the electrical control box. The liquid level in the induction liquid absorbing tank is automatically suspended to prevent liquid from overflowing, and through the elastic parts and The limiting parts reduce the shaking of the liquid suction tank to ensure the stability of the device.
It effectively avoids pus overflow, ensures the airtightness and stability of the negative pressure device, facilitates patients to carry and caregivers to monitor the fluid volume, and improves the safety and portability of the device.
Smart Images
Figure CN222150597U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical device products, and more specifically, to a medical liquid suction negative pressure device for real-time monitoring of liquid volume. Background Art
[0002] In the medical field, pus produced in the patient's traumatic tissue needs to be extracted by a negative pressure device. Currently, most of them are electric negative pressure devices and manual extraction devices. However, the electric negative pressure device is large in size and has a large capacity for extracting liquid, which is not convenient for extracting pus from small traumatic tissues when the patient is moving. The manual extraction device is inefficient and is not conducive to timely extraction of pus produced by traumatic tissues. The existing medical suction device urgently needs a device that combines electric extraction and portability to solve the problem of extracting pus from small traumatic tissues and the inconvenience of patients carrying.
[0003] The utility model patent authorized by the applicant with the announcement number CN219646360U provides a medical suction negative pressure device, but there are three problems that need to be improved. First, when the patient moves, although the arc-shaped claws can play a limiting role, the suction tank is still easy to shake, causing relative displacement between the suction tank and the shell, damaging the interface tube, affecting the air tightness of the interface tube, and causing unstable negative pressure. Second, when the patient moves or lies down, the suction tank tilts, and the liquid in the suction tank is easily sucked into the interface tube or even into the negative pressure device, causing a malfunction. Third, when the liquid in the suction tank overflows, the negative pressure device cannot actively stop suction and issue a warning to remind the nursing staff to replace the suction tank. Therefore, it is necessary to add a monitoring module for the amount of liquid in the suction tank. In response to the above problems, the technical solution provided by this application has made many improvements. Utility Model Content
[0004] The utility model aims to overcome at least one of the deficiencies of the above-mentioned prior art and provide a medical liquid suction negative pressure device for real-time monitoring of liquid volume, which is used to solve the problem that the shaking of the liquid suction tank affects the operation of the device and achieve the effect of real-time monitoring of liquid volume.
[0005] The technical solution adopted by the utility model is that the medical liquid suction negative pressure device for real-time monitoring of liquid volume includes a shell, a liquid suction tank and a negative pressure device, the negative pressure device is arranged in the shell, the liquid suction tank is arranged on one side of the shell, the liquid suction tank is movably connected to the shell, the liquid suction tank is provided with a liquid inlet pipe and a negative pressure port, the liquid inlet pipe is used to absorb liquid, the negative pressure device includes a negative pressure pump and an electric control box, the negative pressure pump is used to maintain the negative pressure of the liquid suction tank, and the electric control box is controlled and connected with the negative pressure pump. The medical liquid suction negative pressure device for real-time monitoring of liquid volume also includes an interface tube and a liquid level sensing device, one end of the interface tube is connected to the negative pressure port, and the other end is connected to the negative pressure device, which is used to stabilize the connection between the liquid suction tank and the shell and ensure the air tightness of the negative pressure device; the liquid level sensing device is longitudinally fixed to the side of the shell close to the liquid suction tank, close to the liquid suction tank; the electric control box is used to receive the liquid level information transmitted by the liquid level sensing device and control the negative pressure pump. The effect of setting up the liquid level sensing device is that when the patient moves or lies down, the suction cup tilts, causing the liquid level to rise, or when the suction cup is about to be filled with pus, the liquid level sensing device can sense the high liquid level and send information to the electrical control box to automatically suspend the operation of the negative pressure pump, thereby effectively avoiding pus overflow and making it convenient for the patient to carry the device with them.
[0006] Furthermore, the liquid level sensing device has multiple sensing positions for sensing different liquid levels in the liquid suction tank, so that the nursing staff can monitor the liquid volume and replace the liquid suction tank or pour out the liquid in the tank in time.
[0007] Furthermore, the liquid level sensing device is movably connected to the side wall of the shell through an elastic member and a limit member. In some embodiments, the liquid level sensing device includes a capacitive sensing strip and a support plate, and the capacitive sensing strip covers the outer side of the support plate. The support plate is concave in shape, which is conducive to a close fit with the suction tank. When the suction tank shakes, the elastic member and the limit member provide a buffer, and the supporting effect of the elastic member enables the liquid level sensing device to be close to the suction tank to ensure sensitive sensing, and the limit member is used to limit the elastic member; the combination of the elastic member and the limit member is conducive to reducing the relative displacement between the liquid level sensing device and the suction tank and the shell, and reducing the interference of the shaking of the suction tank on the device.
[0008] Further, the interface tube includes a first tube, a second tube and an elastic buckle, the elastic buckle is arranged at the tube mouth of the second tube, the first tube and the second tube are fixedly connected by the elastic buckle, the first tube is connected to the liquid suction tank, and the second tube is connected to the negative pressure device. The user can separate the first tube and the second tube by pressing the elastic buckle, thereby separating the liquid suction tank from the negative pressure device.
[0009] Further, the first tube includes a base, a neck, a head, and a sealing ring. The base is connected to the negative pressure port. The neck connects the base and the head. The head is surrounded by a sealing ring, and the sealing ring is used to maintain the airtightness of the connection between the first tube and the second tube. The elastic buckle includes an L-shaped metal sheet, a button, a spring, and a button spring. The button is used to be pressed by the base and control the vertical position of the L-shaped metal sheet. The spring is used to bounce up the L-shaped metal sheet. The button spring is used to make the button rebound and reset. The L-shaped metal sheet has a circular hole. The diameter of the base is Ra1, the diameter of the neck is Ra2, the diameter of the head is Ra3, the inner diameter of the orifice of the second tube is Rb1, and the diameter of the circular hole is Rb2. Ra2 < Ra3 < Rb1 < Ra1, and Rb1 ≤ Rb2. The above size relationship makes the head, neck, and base of the first tube form an annular groove. When installing the liquid suction tank, the user holds the liquid suction tank by hand. Just insert the first tube into the second tube, and the base on the first tube can press the button, so that the L-shaped metal sheet is pushed up by the spring, driving the L-shaped metal sheet to insert into the annular groove, thereby locking the first tube. The structural design of the elastic buckle makes the connection between the first tube and the second tube stable, and the installation method is simple.
[0010] Further, the circular hole includes a stepped notch that narrows downward. The stepped notch includes a first-level notch and a second-level notch. The first-level notch is located at the bottom of the circular hole, and the second-level notch is located below the first-level notch. The button passes through the second-level notch and is fixed to the second tube, and includes a button head, a button neck, and a button base. The button base is connected to the button spring. The button neck connects the button base and the button head. The button head faces the base. The diameter of the button base is smaller than the width of the first-level notch. The diameters of the button head and the button base are both larger than the width of the second-level notch. The diameter of the button neck is smaller than the width of the second-level notch. When disassembling the liquid suction tank, the user only needs to press the L-shaped metal sheet with one hand, and the circular hole moves down to coincide with the orifice of the second tube, so that the L-shaped metal sheet disengages from the annular groove. At the same time, the user holds the liquid suction tank tightly with the other hand and pulls it outwards to separate the liquid suction tank. When the circular hole moves down, the button moves from the narrower second-level notch to the wider first-level notch. The button base loses the restriction of the second-level notch and is ejected by the button spring, so that the button is reset. The design of the circular hole and the button makes the connection between the first tube and the second tube stable, and the disassembly method is simple, which is convenient for replacing the liquid suction tank.
[0011] Furthermore, the bottom side of the shell is flush with the bottom side of the suction tank, the side of the shell is connected to the middle of the side of the suction tank through an arc-shaped claw, and the side of the shell is connected to the bottom of the side of the suction tank through a magnetic suction piece. The suction negative pressure device is usually placed in the forward direction, and making the bottom side of the shell flush with the bottom side of the suction tank is beneficial for patients or nurses to place the suction negative pressure device. The arc-shaped claw and the magnetic suction piece are beneficial to strengthen the connection between the suction tank and the shell, reduce the shaking of the suction tank caused by the patient's movement, and thus avoid damage to the interface tube.
[0012] Furthermore, the distance from the surface of the liquid level sensing device facing the liquid suction tank to the inner wall of the liquid suction tank does not exceed 9 mm. This is conducive to maintaining the sensitivity of the liquid level sensing device. Preferably, the distance from the surface of the liquid level sensing device facing the liquid suction tank to the inner wall of the liquid suction tank does not exceed 7 mm.
[0013] Furthermore, the negative pressure port is covered with a hydrophobic membrane for passing gas while blocking liquid, which helps prevent liquid from entering the negative pressure device and causing malfunctions.
[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the connection between the suction tank and the shell is stable, and there is no shaking that affects the operation of the device; the hydrophobic membrane blocks the liquid through gas at the same time, preventing the liquid from entering the negative pressure device and causing malfunctions due to the patient moving or lying down; the liquid level sensing device is connected to the electric control box, and can automatically stop suction by sensing the higher liquid level in the suction tank, effectively preventing pus from overflowing. On the basis of solving the problem of pus extraction from small traumatic tissues, the device can monitor the liquid volume in real time and is easy to disassemble and carry, which is convenient for patients' daily activities and nursing staff's monitoring and management. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of Example 1 of the non-disassembly liquid suction tank of the medical liquid suction negative pressure device for real-time monitoring of liquid volume.
[0016] Figure 2 is a schematic cross-sectional view of the first tube.
[0017] Figure 3 It is a schematic diagram of the structure of the elastic buckle after the suction tank is disassembled.
[0018] Figure 4 It is a schematic diagram of the back side of the medical liquid suction negative pressure device for real-time monitoring of liquid volume after the liquid suction tank is disassembled.
[0019] Figure 5 It is a structural schematic diagram of Example 2 of the medical liquid suction negative pressure device for real-time monitoring of liquid volume without disassembling the liquid suction tank.
[0020] Description of the accompanying drawings: Figure 1, housing 100, liquid suction tank 200, liquid inlet pipe 210, negative pressure port 220, negative pressure device 300, negative pressure pump 320, electric control box 330, interface pipe 400, first pipe 410, second pipe 420, elastic buckle 430, liquid level sensing device 500, capacitive sensing strip 510, support plate 520; Figure 2 , base 411, neck 412, head 413, sealing ring 414; Figure 3 , inverted L-shaped metal sheet 431, primary notch 4311, secondary notch 4312, button 432, button base 4321, button neck 4322, button head 4323, spring 433, button spring 434; Figure 4 , electronic display screen 600, negative pressure adjustment button 700, switch 800; Figure 5 , capacitive sensing sheet 530 . DETAILED DESCRIPTION
[0021] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0022] Example 1
[0023] like Figure 1 As shown, the medical liquid suction negative pressure device for real-time monitoring of liquid volume provided in this embodiment includes a shell 100, a liquid suction tank 200 and a negative pressure device 300, wherein the negative pressure device 300 is arranged in the shell 100, the liquid suction tank 200 is arranged on one side of the shell 100, the liquid suction tank 200 is movably connected to the shell 100, the liquid suction tank 200 is provided with a liquid inlet pipe 210 and a negative pressure port 220, the liquid inlet pipe 210 is used to suck liquid, the negative pressure device 300 includes a negative pressure pump 320 and an electric control box 330, the negative pressure pump 320 is used to maintain the negative pressure of the liquid suction tank 200, and the electric control box 330 is control-connected to the negative pressure pump 320. The medical suction negative pressure device also includes an interface tube 400 and a liquid level sensing device 500. One end of the interface tube 400 is connected to the negative pressure port 220, and the other end is connected to the negative pressure device 300, which is used to stabilize the connection between the suction tank 200 and the housing 100 and ensure the air tightness of the negative pressure device 300; the liquid level sensing device 500 is longitudinally fixed to the side of the housing 100 close to the suction tank 200, and is close to the suction tank 200; the electric control box 330 is used to receive the liquid level information transmitted by the liquid level sensing device 500 and control the negative pressure pump 320. It is beneficial for patients to carry the device with them to absorb pus produced by traumatic tissue.
[0024] The liquid level sensing device 500 has multiple sensing positions for sensing different liquid levels in the suction tank 200. When the patient moves or lies down, the suction tank 200 tilts, causing the liquid level to rise, or when the suction tank 200 is about to be filled with pus, the liquid level sensing device 500 can sense the high liquid level and send information to the electric control box 330 to automatically suspend the operation of the negative pressure pump 320, effectively preventing pus from overflowing.
[0025] The liquid level sensing device 500 is movably connected to the side wall of the housing 100 through elastic parts and limit parts. In this embodiment, the liquid level sensing device 500 includes a capacitive sensing strip 510 and a support plate 520. The support plate 520 is concave in shape, which is conducive to closely fitting the side of the suction tank 200 to ensure sensitive sensing; the two ends of the support plate 520 are mounted on arc claws, the middle part is connected to the side wall of the housing 100 through multiple springs, and the lower end exceeding the arc claw is connected to the side wall of the housing 100 through a limit screw; the capacitive sensing strip covers the outer side of the support plate, one end is located in the middle of the support plate, and the other end extends from the gap below the interface tube 400 into the housing 100 and is connected to the electric control box 330. When the liquid suction cup 200 shakes, the elastic member and the limit member provide buffering. The elastic member prevents the liquid suction cup 200 from approaching and colliding with the shell 100, and the limit member prevents the liquid suction cup 200 from being too far away from the shell 100. The combination of the elastic member and the limit member is conducive to reducing the relative displacement between the liquid suction cup 200 and the shell 100, and reducing the interference of the shaking of the liquid suction cup 200 on the medical liquid suction negative pressure device.
[0026] The interface tube 400 includes a first tube 410, a second tube 420 and an elastic buckle 430, wherein the elastic buckle 430 is disposed at the tube mouth of the second tube 420, the first tube 410 and the second tube 420 are fixedly connected via the elastic buckle 430, the first tube 410 is connected to the liquid suction tank 200, and the second tube 420 is connected to the negative pressure device 300. The user can separate the first tube 410 and the second tube 420 by pressing the elastic buckle 430, thereby separating the liquid suction tank 200 from the negative pressure device 300, and facilitating the replacement of the liquid suction tank 200.
[0027] like Figure 2 As shown, the first tube 410 includes a base 411, a neck 412, a head 413 and a sealing ring 414, the base 411 is connected to the negative pressure port 220, the neck 412 is connected to the base 411 and the head 413, the head 413 is surrounded by a sealing ring 414, and the sealing ring is used to maintain the airtightness of the connection between the first tube 410 and the second tube 420.
[0028] like Figure 3As shown, the elastic buckle 430 includes an inverted L-shaped metal sheet 431, a button 432, a spring 433, and a button spring 434. The button 432 is used to be pressed down by the base 411 of the first tube 410 and control the vertical position of the inverted L-shaped metal sheet 431. The spring 433 is used to bounce up the inverted L-shaped metal sheet 431. The button spring 434 is used to make the button 432 rebound and reset. The inverted L-shaped metal sheet 431 has a circular hole. The diameter of the base 411 of the first tube 410 is Ra1, the diameter of the neck 412 is Ra2, the diameter of the head 413 is Ra3, the inner diameter of the orifice of the second tube 420 is Rb1, and the diameter of the circular hole is Rb2. Ra2 < Ra3 < Rb1 < Ra1, and Rb1 ≤ Rb2. The above size relationship makes the base 411, the neck 412, and the head 413 of the first tube 410 form an annular groove. When installing the liquid suction tank, the user holds the liquid suction tank 200 by hand. Just insert the first tube 410 into the second tube 420, and the base 411 on the first tube 410 can press down the button 432, so that the inverted L-shaped metal sheet 431 is pushed up by the spring 433, and the inverted L-shaped metal sheet 431 is inserted into the annular groove, thereby locking the first tube 410. The structural design of the elastic buckle 430 makes the connection between the first tube 410 and the second tube 420 stable, and the installation method is simple, which is convenient for replacing the liquid suction tank 200.
[0029] The circular hole of the inverted L-shaped metal sheet 431 includes a stepped notch that narrows downward, and the stepped notch includes a primary notch 4311 and a secondary notch 4312. The primary notch 4311 is located at the bottom of the circular hole, and the secondary notch 4312 is located below the primary notch 4311. The button 432 passes through the secondary notch 4312 and is fixed to the second tube 420, including a button base 4321, a button neck 4322 and a button head 4323. The button base 4321 is connected to the button spring 434, the button neck 4322 is connected to the button base 4321 and the button head 4323, the button head 4323 is directly opposite to the base 411 of the first tube 410; the diameter of the button base 4321 is smaller than the width of the primary notch 4311, the diameters of the button head 4323 and the button base 4321 are larger than the width of the secondary notch 4312, and the diameter of the button neck 4322 is smaller than the width of the secondary notch 4312. When disassembling the liquid suction tank 200, the user only needs to press the inverted L-shaped metal sheet 431 with one hand, the circular hole moves down and overlaps with the tube hole of the second tube 420, so that the inverted L-shaped metal sheet 431 is separated from the annular groove, and at the same time, the other hand holds the liquid suction tank 200 tightly and pulls it outward, so that the liquid suction tank 200 can be separated. When the circular hole moves downward, the button 432 moves from the narrow secondary notch 4312 to the wider primary notch 4311, and the button base 4321 loses the restriction of the secondary notch 4312 and is ejected by the button spring 434, thereby resetting the button 432. The design of the circular hole and the button 432 ensures a stable connection between the first tube 410 and the second tube 420, and the disassembly method is simple, which facilitates the replacement of the liquid suction tank 200.
[0030] The bottom side of the shell 100 is flush with the bottom side of the liquid suction tank 200, the side of the shell 100 is connected to the middle of the side of the liquid suction tank 200 through an arc-shaped claw, and the side of the shell 100 is connected to the bottom of the side of the liquid suction tank 200 through a magnetic suction piece. The liquid suction negative pressure device is usually placed in the forward direction, and it is beneficial for patients or nurses to place the liquid suction negative pressure device by making the bottom side of the shell 100 flush with the bottom side of the liquid suction tank 200. The arc-shaped claw and the magnetic suction piece are beneficial to strengthen the connection between the liquid suction tank 200 and the shell 100, reduce the shaking of the liquid suction tank 200 caused by the patient's actions, and thus avoid damage to the interface tube 400.
[0031] The distance between the surface of the liquid level sensing device 500 facing the liquid suction tank 200 and the inner wall of the liquid suction tank 200 is 7 mm, which is conducive to maintaining the sensitivity of the liquid level sensing device 500.
[0032] The negative pressure port 220 is covered with a hydrophobic film for passing gas while blocking liquid, which helps prevent liquid from entering the negative pressure device 300 and causing malfunctions.
[0033] The pressure value of the negative pressure pump 320 is in the range of 10 kPa-40 kPa. The negative pressure in this pressure value range can ensure the timely absorption of pus from small wound tissues while ensuring that the patient is not harmed.
[0034] like Figure 4 As shown, an electronic display screen 600, a negative pressure adjustment button 700 and a switch 800 are provided on one side of the housing 100. The electronic display screen 600 is used to display the pressure value and power of the negative pressure pump 320. When a patient or a nurse uses the suction negative pressure device, the pressure value of the negative pressure pump 320 can be monitored from the electronic display screen 600 to see whether it is within a normal range, and can be adjusted by the negative pressure adjustment button 700. A wireless communication device is provided in the electronic display screen 600, and the wireless communication device is connected to the negative pressure device 300. When the nurse service center receives the signal command sent by the wireless communication device, the suction negative pressure device can be controlled and monitored when the patient is unconscious or unable to operate the suction negative pressure device.
[0035] Example 2
[0036] like Figure 5 As shown, the medical liquid suction negative pressure device for real-time monitoring of liquid volume provided in this embodiment includes a shell 100, a liquid suction tank 200 and a negative pressure device 300, wherein the negative pressure device 300 is arranged in the shell 100, the liquid suction tank 200 is arranged on one side of the shell 100, the liquid suction tank 200 is movably connected to the shell 100, the liquid suction tank 200 is provided with a liquid inlet pipe 210 and a negative pressure port 220, the liquid inlet pipe 210 is used to suck liquid, the negative pressure device 300 includes a negative pressure pump 320 and an electric control box 330, the negative pressure pump 320 is used to maintain the negative pressure of the liquid suction tank 200, and the electric control box 330 is control-connected to the negative pressure pump 320. The medical suction negative pressure device also includes an interface tube 400 and a liquid level sensing device 500. One end of the interface tube 400 is connected to the negative pressure port 220, and the other end is connected to the negative pressure device 300, which is used to stabilize the connection between the suction tank 200 and the housing 100 and ensure the air tightness of the negative pressure device 300; the liquid level sensing device 500 is longitudinally fixed to the side of the housing 100 close to the suction tank 200, and is close to the suction tank 200; the electric control box 330 is used to receive the liquid level information transmitted by the liquid level sensing device 500 and control the negative pressure pump 320. It is beneficial for patients to carry the device with them to absorb pus produced by traumatic tissue.
[0037] The liquid level sensing device 500 includes a capacitive sensing sheet 530 for sensing the high liquid level in the liquid suction tank 200. The capacitive sensing sheet 530 is fixed on the arc-shaped claw and connected to the electric control box 330 through a line. When the patient moves or lies down, the liquid suction tank 200 tilts, causing the liquid level to rise, or when the pus in the liquid suction tank 200 is about to be filled, the liquid level sensing device 500 can sense the high liquid level and send information to the electric control box 330 to automatically suspend the operation of the negative pressure pump 320, effectively preventing pus from overflowing. The capacitive sensing sheet 530 is concave in shape, which is conducive to closely fitting the side of the liquid suction tank 200 to ensure sensitive sensing.
[0038] The interface tube 400 includes a first tube 410, a second tube 420 and an elastic buckle 430, wherein the elastic buckle 430 is disposed at the tube mouth of the second tube 420, the first tube 410 and the second tube 420 are fixedly connected via the elastic buckle 430, the first tube 410 is connected to the liquid suction tank 200, and the second tube 420 is connected to the negative pressure device 300. The user can separate the first tube 410 and the second tube 420 by pressing the elastic buckle 430, thereby separating the liquid suction tank 200 from the negative pressure device 300, and facilitating the replacement of the liquid suction tank 200.
[0039] like Figure 2 As shown, the first tube 410 includes a base 411, a neck 412, a head 413 and a sealing ring 414, the base 411 is connected to the negative pressure port 220, the neck 412 is connected to the base 411 and the head 413, the head 413 is surrounded by a sealing ring 414, and the sealing ring is used to maintain the airtightness of the connection between the first tube 410 and the second tube 420.
[0040] like Figure 3As shown, the elastic buckle 430 includes an inverted L-shaped metal sheet 431, a button 432, a spring 433, and a button spring 434. The button 432 is used to be pressed down by the base 411 of the first tube 410 and control the vertical position of the inverted L-shaped metal sheet 431. The spring 433 is used to bounce up the inverted L-shaped metal sheet 431. The button spring 434 is used to make the button 432 rebound and reset. The inverted L-shaped metal sheet 431 has a circular hole. The diameter of the base 411 of the first tube 410 is Ra1, the diameter of the neck 412 is Ra2, the diameter of the head 413 is Ra3, the inner diameter of the orifice of the second tube 420 is Rb1, and the diameter of the circular hole is Rb2. Ra2 < Ra3 < Rb1 < Ra1, and Rb1 ≤ Rb2. The above size relationship enables the base 411, the neck 412, and the head 413 of the first tube 410 to form an annular groove. When installing the liquid suction tank, the user holds the liquid suction tank 200 by hand and only needs to insert the first tube 410 into the second tube 420. The base 411 on the first tube 410 can press down the button 432, causing the inverted L-shaped metal sheet 431 to be pushed up by the spring 433. The inverted L-shaped metal sheet 431 is inserted into the annular groove, thereby locking the first tube 410. The structural design of the elastic buckle 430 makes the connection between the first tube 410 and the second tube 420 stable, and the installation method is simple, facilitating the replacement of the liquid suction tank 200.
[0041] The circular hole of the inverted L-shaped metal sheet 431 includes a stepped notch that narrows downward, and the stepped notch includes a primary notch 4311 and a secondary notch 4312. The primary notch 4311 is located at the bottom of the circular hole, and the secondary notch 4312 is located below the primary notch 4311. The button 432 passes through the secondary notch 4312 and is fixed to the second tube 420, including a button base 4321, a button neck 4322 and a button head 4323. The button base 4321 is connected to the button spring 434, the button neck 4322 is connected to the button base 4321 and the button head 4323, the button head 4323 is directly opposite to the base 411 of the first tube 410; the diameter of the button base 4321 is smaller than the width of the primary notch 4311, the diameters of the button head 4323 and the button base 4321 are larger than the width of the secondary notch 4312, and the diameter of the button neck 4322 is smaller than the width of the secondary notch 4312. When disassembling the liquid suction tank 200, the user only needs to press the inverted L-shaped metal sheet 431 with one hand, the circular hole moves down and overlaps with the tube hole of the second tube 420, so that the inverted L-shaped metal sheet 431 is separated from the annular groove, and at the same time, the other hand holds the liquid suction tank 200 tightly and pulls it outward, so that the liquid suction tank 200 can be separated. When the circular hole moves downward, the button 432 moves from the narrow secondary notch 4312 to the wider primary notch 4311, and the button base 4321 loses the restriction of the secondary notch 4312 and is ejected by the button spring 434, thereby resetting the button 432. The design of the circular hole and the button 432 ensures a stable connection between the first tube 410 and the second tube 420, and the disassembly method is simple, which facilitates the replacement of the liquid suction tank 200.
[0042] The bottom side of the shell 100 is flush with the bottom side of the liquid suction tank 200, the side of the shell 100 is connected to the middle of the side of the liquid suction tank 200 through an arc-shaped claw, and the side of the shell 100 is connected to the bottom of the side of the liquid suction tank 200 through a magnetic suction piece. The liquid suction negative pressure device is usually placed in the forward direction, and it is beneficial for patients or nurses to place the liquid suction negative pressure device by making the bottom side of the shell 100 flush with the bottom side of the liquid suction tank 200. The arc-shaped claw and the magnetic suction piece are beneficial to strengthen the connection between the liquid suction tank 200 and the shell 100, reduce the shaking of the liquid suction tank 200 caused by the patient's actions, and thus avoid damage to the interface tube 400.
[0043] The distance between the surface of the liquid level sensing device 500 facing the liquid suction tank 200 and the inner wall of the liquid suction tank 200 is 7 mm, which is conducive to maintaining the sensitivity of the liquid level sensing device 500.
[0044] The negative pressure port 220 is covered with a hydrophobic film for passing gas while blocking liquid, which helps prevent liquid from entering the negative pressure device 300 and causing malfunctions.
[0045] The pressure value of the negative pressure pump 320 is in the range of 10 kPa-40 kPa. The negative pressure in this pressure value range can ensure the timely absorption of pus from small wound tissues while ensuring that the patient is not harmed.
[0046] like Figure 4 As shown, an electronic display screen 600, a negative pressure adjustment button 700 and a switch 800 are provided on one side of the housing 100. The electronic display screen 600 is used to display the pressure value and power of the negative pressure pump 320. When a patient or a nurse uses the suction negative pressure device, the pressure value of the negative pressure pump 320 can be monitored from the electronic display screen 600 to see whether it is within a normal range, and can be adjusted by the negative pressure adjustment button 700. A wireless communication device is provided in the electronic display screen 600, and the wireless communication device is connected to the negative pressure device 300. When the nurse service center receives the signal command sent by the wireless communication device, the suction negative pressure device can be controlled and monitored when the patient is unconscious or unable to operate the suction negative pressure device.
[0047] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.
Claims
1. A medical liquid suction negative pressure device for real-time monitoring of liquid volume, comprising a shell, a liquid suction tank and a negative pressure device, wherein the negative pressure device is arranged in the shell, the liquid suction tank is arranged on one side of the shell, the liquid suction tank is movably connected to the shell, the liquid suction tank is provided with a liquid inlet pipe and a negative pressure port, the liquid inlet pipe is used to suck liquid, the negative pressure device comprises a negative pressure pump and an electric control box, the negative pressure pump is used to maintain the negative pressure of the liquid suction tank, and the electric control box is control-connected to the negative pressure pump, characterized in that: The medical liquid suction negative pressure device further includes an interface pipe and a liquid level sensing device. One end of the interface pipe is connected to the negative pressure port, and the other end is connected to the negative pressure device. The liquid level sensing device is longitudinally fixed on one side of the housing close to the liquid suction tank and is in close contact with the liquid suction tank. The electronic control box is used to receive the liquid level information transmitted by the liquid level sensing device and control the negative pressure pump.
2. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to claim 1, characterized in that: The liquid level sensing device has multiple sensing positions for sensing different liquid levels in the liquid suction tank.
3. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to claim 2, characterized in that: The liquid level sensing device is movably connected to the side wall of the housing through an elastic member and a limiting member.
4. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to any one of claims 1 to 3, characterized in that: The interface pipe includes a first pipe, a second pipe, and an elastic buckle. The elastic buckle is arranged at the orifice of the second pipe. The first pipe and the second pipe are fixedly connected through the elastic buckle. The first pipe is connected to the liquid suction tank, and the second pipe is connected to the negative pressure device.
5. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to claim 4, characterized in that: The first pipe includes a base, a neck, a head, and a sealing ring. The base is connected to the negative pressure port. The neck connects the base and the head. The head is surrounded by the sealing ring, and the sealing ring is used to maintain the airtightness of the connection between the first pipe and the second pipe.
6. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to claim 5, characterized in that: The elastic buckle includes an inverted L-shaped metal sheet, a button, a spring, and a button spring. The button is used to be pressed down by the base and control the vertical position of the inverted L-shaped metal sheet. The spring is used to bounce up the inverted L-shaped metal sheet. The button spring is used to make the button rebound and reset. The inverted L-shaped metal sheet has a circular hole. The diameter of the base is Ra1, the diameter of the neck is Ra2, the diameter of the head is Ra3, the inner diameter of the orifice of the second pipe is Rb1, and the aperture of the circular hole is Rb2. Ra2 < Ra3 < Rb1 < Ra1, and Rb1 ≤ Rb2.
7. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to claim 6, characterized in that: The circular hole includes a stepped notch that narrows downward. The stepped notch includes a first-level notch and a second-level notch. The first-level notch is located at the bottom of the circular hole, and the second-level notch is located below the first-level notch. The button passes through the second-level notch and is arranged in the second pipe, including a button base, a button neck, and a button head. The button base is connected to the button spring. The button neck connects the button base and the button head. The button head faces the base. The diameter of the button base is smaller than the width of the first-level notch. The diameters of the button head and the button base are both larger than the width of the second-level notch. The diameter of the button neck is smaller than the width of the second-level notch.
8. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to any one of claims 1 to 3, characterized in that: The bottom side of the housing is flush with the bottom side of the liquid suction tank. The middle part of the side surface of the housing and the side surface of the liquid suction tank are connected by an arc-shaped claw. The bottom part of the side surface of the housing and the side surface of the liquid suction tank are connected by a magnetic component.
9. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to any one of claims 1 to 3, characterized in that: The distance from the surface of the liquid level sensing device facing the liquid suction tank to the inner side wall of the liquid suction tank does not exceed 9 mm.
10. The medical liquid suction negative pressure device for real-time monitoring of liquid volume according to any one of claims 1 to 3, characterized in that: The negative pressure port is covered with a hydrophobic membrane for passing gas while blocking liquid.