A negative pressure drainage assembly and a negative pressure drainage device

Abstract

The present application relates to the technical field of negative pressure drainage device, disclose a kind of negative pressure drainage assembly and negative pressure drainage device, the negative pressure drainage assembly includes first plate and second plate, the first plate and second plate are aligned, and the central axis is located in the same straight line, several springs, it equidistantly arranged between first plate and second plate, several groups of telescopic components, it equidistantly arranged between first plate and second plate.The present application provides a rigid guide rail for spring by the pipe wall of telescopic component, when medical staff presses first plate, because there are multiple groups of telescopic components, so that the force is dispersed to multiple groups of telescopic components, and then the force is shared by multiple springs, so that multiple springs are synchronously contracted when stressed, by the setting, when single-handedly pressing negative pressure drainage device, medical staff can also keep multiple springs balanced, avoid negative pressure drainage device slipping and pulling the wound of patient, bring security risk to patient.

Description

Technical Field

[0001] This invention relates to the field of negative pressure drainage technology, and more particularly to a negative pressure drainage component and a negative pressure drainage device. Background Technology

[0002] Disposable negative pressure drainage devices are common medical consumables, mainly used after surgery or during wound treatment. Simply put, it is a closed collection device that uses negative pressure (which can be understood as suction) to drain excess fluid (such as blood, exudate, and pus) from the wound site, with the aim of promoting wound healing and preventing infection.

[0003] When using existing disposable negative pressure drainage devices, medical staff manually press the top and bottom plates of the device, compressing the spring between them. The spring's elasticity creates a negative pressure state inside the drainage device. Since the spring is not restrained between the top and bottom plates, medical staff need to press directly along the central axis of the spring to ensure stable spring contraction. However, in clinical practice, nurses often need to hold the drainage tube with one hand while pressing the negative pressure drainage device with the other. This can easily lead to uneven pressure, causing an imbalance in the spring force and resulting in the drainage device slipping out of their hands. This slippage can pull on the drainage tube connected to the patient, causing pain in the wound and posing a safety hazard to the patient. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a negative pressure drainage component and a negative pressure drainage device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A negative pressure drainage component, comprising: The first plate and the second plate are aligned and their central axes are on the same straight line. Several springs are equidistantly arranged between the first plate and the second plate; Several sets of telescopic components are equidistantly arranged between the first plate and the second plate. The several sets of telescopic components include: a first cylinder, a second cylinder, several third cylinders and a fourth cylinder. The first cylinder is disposed on the lower surface of the first plate, the second cylinder is disposed on the upper surface of the second plate, the fourth cylinder is inserted inside the second cylinder, the first cylinder is sleeved with the second cylinder through a plurality of third cylinders and fourth cylinders, the first cylinder, the second cylinder, the plurality of third cylinders and the fourth cylinder are located on the same axis and can move along the axial direction, and the spring is disposed inside the first cylinder, the second cylinder, the plurality of third cylinders and the fourth cylinder.

[0006] As a further embodiment of the present invention, a flexible film is fixedly connected between the first plate and the second plate, and a receiving cavity is formed between the first plate, the second plate and the flexible film. A plurality of springs are disposed inside the receiving cavity, and a plurality of sets of telescopic components are disposed inside the receiving cavity. Two hose connectors are fixedly disposed on the upper surface of the first plate, and both hose connectors are connected to the receiving cavity.

[0007] As a further embodiment of the present invention, the inner walls of the second cylinder, the third cylinder and the fourth cylinder are provided with a plurality of limiting grooves at equal intervals. The end of the limiting groove near the second plate passes through the end face of the third cylinder, the second cylinder and the fourth cylinder. The outer surfaces of the first cylinder, the third cylinder and the fourth cylinder are provided with a plurality of limiting blocks at equal intervals. The limiting blocks are slidably installed with the inner wall of the limiting groove.

[0008] As a further embodiment of the present invention, a plurality of first grooves are equidistantly provided on the outer circumferential surfaces of the plurality of third and fourth cylinders, and a first locking block is provided between the plurality of first grooves near the inner wall of the second plate. The first locking block is L-shaped, and a connecting block is fixedly provided on the lower surface of the first locking block. The bottom end of the connecting block is fixedly connected to the bottom wall of the first groove.

[0009] As a further embodiment of the present invention, the first locking block has a second protrusion at the end away from the spring, and the first locking block has a third protrusion on the lower surface of the second protrusion, and the connecting block is disposed between the second protrusion and the third protrusion.

[0010] As a further embodiment of the present invention, a plurality of second grooves are equidistantly provided on the outer circumferential surfaces of the plurality of third cylinders and first cylinders, and a second locking block is provided between the inner walls of the plurality of second grooves. The top end of the second locking block is fixedly connected to the top wall of the second groove, and a protrusion is provided on the outer surface of the bottom end of the second locking block near the spring. A fourth protrusion is provided on the outer surface of the top end of the first locking block opposite the spring, and a second oblique angle is provided on the upper surface of the fourth protrusion.

[0011] As a further embodiment of the present invention, a ring is sleeved on the outer surface of the second cylinder, and a plurality of elastic pieces are fixedly arranged at equal intervals on the lower surface of the ring. The bottom end of the elastic pieces abuts against the outer surface of one side of the second locking block. A third plate is arranged inside the receiving cavity, and the ring is fixedly arranged on the lower surface of the third plate. A float is fixedly installed on the lower surface of the third plate.

[0012] As a further embodiment of the present invention, a plurality of fourth grooves are equidistantly provided on the outer circumferential surface of the second cylinder near the bottom end. A third locking block is fixedly installed on the bottom wall of each of the plurality of fourth grooves. A sixth protrusion is provided on the outer surface of the top of the third locking block near the elastic sheet. A fifth protrusion is provided on the outer surface of the top of the third locking block near the spring. A third oblique angle is provided on the upper surface of the fifth protrusion. A first protrusion is provided at the bottom end of the elastic sheet. The first protrusion is disposed inside the fourth groove. A first oblique angle is provided on the top wall of the first groove.

[0013] As a further aspect of the present invention, a plurality of third grooves are formed on the outer circumferential surface of the first cylinder, and the first protrusion is disposed inside the third groove.

[0014] As a further aspect of the present invention, a negative pressure drainage device includes the aforementioned negative pressure drainage component.

[0015] This invention provides a rigid guide track for the springs through the tube wall of the telescopic assembly. The springs are constrained inside the tube wall and can only extend and retract along the axial direction. When medical staff press the first plate, because there are multiple sets of telescopic assemblies, the pressing force is distributed among multiple sets of telescopic assemblies, and thus this force is shared by multiple springs. This allows multiple springs to contract synchronously when under force. Through this design, medical staff can maintain a balanced force on multiple springs when pressing the negative pressure drainage device with one hand, preventing the negative pressure drainage device from slipping and pulling on the patient's wound, thus avoiding safety hazards to the patient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the negative pressure drainage component proposed in this invention; Figure 2 This is a schematic diagram of the internal structure of the negative pressure drainage component proposed in this invention; Figure 3 This is a schematic diagram of the spring in the negative pressure drainage component proposed in this invention; Figure 4 This is a schematic diagram of the telescopic component of the negative pressure drainage component proposed in this invention; Figure 5 This is a cross-sectional schematic diagram of the telescopic component of the negative pressure drainage component proposed in this invention; Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle; Figure 7 This is a schematic diagram of the exploded structure of the telescopic component of the negative pressure drainage component proposed in this invention; Figure 8 for Figure 7 Enlarged view of a portion of point B in the middle; Figure 9This is a schematic diagram of the first cylinder of the negative pressure drainage assembly proposed in this invention; Figure 10 This is a schematic diagram of the third cylinder of the negative pressure drainage assembly proposed in this invention; Figure 11 for Figure 10 Enlarged view of a portion of point C in the middle; Figure 12 This is a schematic diagram of the fourth cylinder of the negative pressure drainage component proposed in this invention; Figure 13 This is a schematic diagram of the annular structure of the negative pressure drainage component proposed in this invention; Figure 14 This is a schematic diagram of the first card block of the negative pressure drainage component proposed in this invention; Figure 15 This is a schematic diagram of the third card block of the negative pressure drainage component proposed in this invention.

[0017] In the picture: 100, First plate; 200, Second plate; 300, Flexible film; 400, Telescopic component; 410, First cylinder; 411, Third groove; 420, Second cylinder; 421, Fourth groove; 430, Third cylinder; 440, Fourth cylinder; 450, First groove; 451, First bevel; 460, Limiting groove; 470, Limiting block; 480, Second groove; 500, Third plate; 510, Float; 600, Ring; 610, Elastic sheet; 620, First protrusion; 700, First locking block; 710, Connecting block; 720, Second protrusion; 730, Third protrusion; 740, Fourth protrusion; 741, Second oblique angle; 800, Second locking block; 900, Third locking block; 910, Fifth protrusion; 911, Third oblique angle; 920, Sixth protrusion; 1000, Spring. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] To prevent medical staff from slipping the disposable negative pressure drainage device from their hands due to uneven pressure when using it, such as... Figure 1 and Figure 2 As shown, this invention proposes a negative pressure drainage assembly, comprising: a first plate 100, a second plate 200, a plurality of springs 1000, and a plurality of telescopic components 400. Specifically, the first plate 100 and the second plate 200 are aligned, as shown... Figure 1 As shown, the first plate 100 and the second plate 200 are vertically aligned and their central axes are on the same straight line. The first plate 100 and the second plate 200 are designed to move closer to or further away from each other along the central axis. Several springs 1000 are equidistantly arranged between the first plate 100 and the second plate 200. In actual production, the two ends of the springs 1000 are fixedly connected to the first plate 100 and the second plate 200 respectively. Then, the elastic force of the springs 1000 keeps the first plate 100 and the second plate 200 in their initial separated state. In use, medical staff place the second plate 200 on a table and then manually press the first plate 100. To ensure that the force is evenly and evenly distributed to each spring 1000 when pressing the first plate 100, several sets of telescopic components 400 are equidistantly arranged between the first plate 100 and the second plate 200. The sets of telescopic components 400 include: a first cylinder 410, a second cylinder 420, several third cylinders 430, and a fourth cylinder 440. Specifically, as shown... Figure 3 and Figure 4 As shown, the first cylinder 410 is disposed on the lower surface of the first plate 100, the second cylinder 420 is disposed on the upper surface of the second plate 200, and the fourth cylinder 440 is inserted into the second cylinder 420. The first cylinder 410 is sleeved with the second cylinder 420 through a plurality of third cylinders 430 and fourth cylinders 440. The first cylinder 410, the second cylinder 420, the plurality of third cylinders 430 and the fourth cylinder 440 are arranged on the same axis and can move along the axial direction. A plurality of springs 1000 are respectively disposed inside the first cylinder 410, the second cylinder 420, the plurality of third cylinders 430 and the fourth cylinder 440. By adjusting the first cylinder 410, the second cylinder 420, the plurality of third cylinders 430 and the fourth cylinder 440 according to... Figure 4As shown, the components are nested together in sequence to form a cylindrical structure that can extend or retract. The tube wall of the telescopic component 400 provides a rigid guide rail for the spring 1000. The spring 1000 is constrained inside the tube wall and can only extend or retract along the axial direction. When medical staff press the first plate 100, because there are multiple sets of telescopic components 400, the pressing force is distributed among multiple sets of telescopic components 400, and thus this force is shared by multiple springs 1000. This allows multiple springs 1000 to contract synchronously when subjected to force. Through this design, medical staff can maintain balanced force on multiple springs 1000 when pressing the negative pressure drainage device with one hand, preventing the negative pressure drainage device from slipping and pulling on the patient's wound, thus avoiding safety hazards to the patient.

[0022] In this embodiment, in order to ensure that the negative pressure drainage device has negative pressure after the first plate 100 is pressed, such as... Figure 1 As shown, a flexible film 300 is fixedly connected between the first plate 100 and the second plate 200. A receiving cavity is formed between the first plate 100, the second plate 200 and the flexible film 300. Several springs 1000 are disposed inside the receiving cavity, and several sets of telescopic components 400 are disposed inside the receiving cavity. Two hose connectors are fixedly disposed on the upper surface of the first plate 100. Both hose connectors are connected to the receiving cavity. In actual use, when medical staff press the first plate 100 to bring it close to the second plate 200, the air in the receiving cavity is discharged through the exhaust valve on one of the hose connectors. Then, the two hose connectors are sealed. At this time, under the elastic force of the springs 1000, a negative pressure is formed inside the receiving cavity until subsequent use, when it is connected to the corresponding connecting tube to drain the pus from the wound of the patient.

[0023] In this embodiment, in order to limit the installation positions of the first cylinder 410, the second cylinder 420, the plurality of third cylinders 430, and the fourth cylinder 440, so that they have a fixed stroke during extension and retraction, and to prevent disengagement between the first cylinder 410, the second cylinder 420, the plurality of third cylinders 430, and the fourth cylinder 440, such as Figure 5 , Figure 7 and Figure 9As shown, the inner walls of the second cylinder 420, the third cylinder 430, and the fourth cylinder 440 are all equidistantly provided with multiple limiting grooves 460. The end of each limiting groove 460 near the second plate 200 penetrates the end face of the third cylinder 430, the second cylinder 420, and the fourth cylinder 440. The outer surfaces of the first cylinder 410, the third cylinder 430, and the fourth cylinder 440 are equidistantly provided with multiple limiting blocks 470. These limiting blocks 470 are slidably installed with the inner walls of the limiting grooves 460. The cooperation between the limiting blocks 470 and the limiting grooves 460 restricts the installation position of the first cylinder 410, the second cylinder 420, and the several third cylinders 430 and fourth cylinders 440, ensuring they can only move along the central axis and cannot rotate. Furthermore, the limiting grooves 460 are through-holes near the bottom but not through-holes at the top. In actual production, the limiting grooves 460 opened on the inner walls of the second cylinder 420, the third cylinder 430 and the fourth cylinder 440, and the limiting blocks 470 set on the outer surfaces of the first cylinder 410, the third cylinder 430 and the fourth cylinder 440 can be completed by integral injection molding. The installation of the first cylinder 410 and the first plate 100, and the installation of the second cylinder 420 and the second plate 200 can be achieved by melt bonding to ensure the firmness of subsequent use.

[0024] In this embodiment, to ensure that medical staff can clearly know whether they have pressed the first plate 100 correctly and to ensure sufficient negative pressure subsequently, such as... Figure 4 and Figure 5 As shown, multiple first grooves 450 are equidistantly provided on the outer circumferential surfaces of several third cylinders 430 and fourth cylinders 440. First locking blocks 700 are provided between each of the multiple first grooves 450 and the inner wall of the second plate 200. Figure 6 and Figure 14 As shown, the first locking block 700 is L-shaped. A connecting block 710 is fixedly mounted on the lower surface of the first locking block 700. The bottom end of the connecting block 710 is fixedly connected to the bottom wall of the first groove 450. A second protrusion 720 is formed at the end of the first locking block 700 away from the spring 1000. A third protrusion 730 is formed on the lower surface of the first locking block 700 opposite to the second protrusion 720. The connecting block 710 is disposed between the second protrusion 720 and the third protrusion 730. Specifically, the first locking block 700 is fused and bonded to the bottom wall of the first groove 450 via the connecting block 710. Before the first plate 100 is pressed down, the second protrusion 720 extends out of the first groove 450, that is, the lower surface of the second protrusion 720 abuts against the top end face of the adjacent second cylinder 420, third cylinder 430 and fourth cylinder 440. At this time, the limiting block 470 also abuts against the top end position of the limiting groove 460. Through this setting, the position of the third cylinder 430 and the fourth cylinder 440 is restricted.

[0025] When the first plate 100 is pressed down, it will cause the first cylinder 410 to move downwards first, and the bottom end of the first cylinder 410 will move to... Figure 6 At the position of spacing D, continue pressing down on the first cylinder 410, so that its bottom end presses against the end of the first locking block 700 near the spring 1000. Because the fixed installation position of the first locking block 700 is the connecting block 710, the connecting block 710 can undergo elastic deformation under force, so the second protrusion 720 will gradually rise up until the third protrusion 730 abuts against the bottom wall of the first groove 450. At this time, the second protrusion 720 completely retracts into the interior of the first groove 450, and the second protrusion 720 no longer limits the third cylinder 430 and the fourth cylinder 440. Through this setting, when the first plate 100 is pressed down, the first cylinder 410, the second cylinder 420, and several third cylinders 430 and fourth cylinders 440 can retract sequentially from top to bottom, section by section. Sequential retraction ensures that each section is completely nested into the next section. Only when the last section retracts in is the spring 1000 truly compressed to its designed limit position, which ensures that a fixed and maximum volume of air is expelled with each press. When you release your hand, the negative pressure generated by the spring 1000 rebound is repeatable and standardized, avoiding insufficient negative pressure caused by incomplete pressing.

[0026] In this embodiment, when the first cylinder 410, the second cylinder 420, several third cylinders 430, and the fourth cylinder 440 are pressed and contracted sequentially by medical personnel, the flexible film 300 is also compressed, causing the scale on its upper surface to be unable to accurately measure the amount of liquid. This is because liquid gradually enters the receiving cavity during subsequent use. At this time, under the force of the spring 1000, the first plate 100 and the second plate 200 will gradually separate, that is, the first cylinder 410, the second cylinder 420, several third cylinders 430, and the fourth cylinder 440 will gradually extend. To ensure that the extension occurs sequentially from the fourth cylinder 440 to the several third cylinders 430 and then back to the first cylinder 410, it is convenient for medical personnel to determine the amount of liquid discharged by the patient based on the number of extended first cylinders 410, several third cylinders 430, and fourth cylinders 440 during subsequent use. Figure 5 , Figure 10 and Figure 11 As shown, multiple second grooves 480 are equidistantly provided on the outer circumferential surfaces of several third cylinders 430 and first cylinders 410. A fourth protrusion 740 is provided on the outer surface of the first locking block 700 on the side opposite to the spring 1000. A second oblique angle 741 is provided on the upper surface of the fourth protrusion 740. When the first cylinder 410 moves down, it will drive the second groove 480 to the position of the fourth protrusion 740. Because the first locking block 700 has a certain elastic deformation capability, the fourth protrusion 740 will slide into the interior of the second groove 480 as the first cylinder 410 continues to move down, thereby hooking the bottom wall of the second groove 480 and pushing inward in sequence, so that the first cylinder 410 and the third cylinder 430 can be limited after gradually moving down.

[0027] In order to allow liquid to enter the flexible film 300, the first cylinder 410 and the third cylinder 430 extend sequentially, as follows: Figure 4 and Figure 9 As shown, a second locking block 800 is provided between the inner walls of multiple second grooves 480. The top of the second locking block 800 is fixedly connected to the top wall of the second groove 480. A protrusion is provided on the outer surface of the bottom end of the second locking block 800 near the spring 1000. A ring 600 is fitted on the outer surface of the second cylinder 420. Multiple elastic plates 610 are fixedly arranged at equal intervals on the lower surface of the ring 600. A third plate 500 is provided inside the receiving cavity. The ring 600 is fixedly arranged on the lower surface of the third plate 500. A float 510 is fixedly installed on the lower surface of the third plate 500. When liquid enters the receiving cavity inside the flexible film 300, the float 510 will slowly rise, such as... Figure 5 As shown, because the fourth cylinder 440 and the second cylinder 420 are limited by the cooperation of the fourth protrusion 740 and the second groove 480, the fourth cylinder 440 will slowly rise under the force of the spring 1000. Because the elastic piece 610 is elastic, when the second cylinder 420 is in position, the bottom end of the elastic piece 610 abuts against the outer surface of the second cylinder 420. As it gradually rises with the float 510 and the third plate 500, the elastic piece 610 slides into the position of the first groove 450. Because at this time, the second locking block 800 is also located in the position of the first groove 450, the bottom end of the elastic piece 610 and the second locking block 800 are in contact. The outer surfaces of one side of block 800 abut against each other, thereby causing the second locking block 800 to undergo elastic deformation, causing the protrusion at its bottom end to press against the fourth protrusion 740, causing the fourth protrusion 740 to slide out of the second groove 480, thereby releasing the restriction of the fourth protrusion 740 and the second groove 480, allowing the next third cylinder 430 to extend as the liquid increases. This setting allows the telescopic component 400 to gradually extend as the liquid in the containment cavity inside the flexible film 300 increases, and to gradually extend from bottom to top section by section. Medical staff can determine how much liquid to discharge based on the number of sections of the telescopic component 400 that have been extended.

[0028] It should be noted that, because the elastic deformation capacity of the elastic sheet 610 is limited, in actual design, the total wall thickness of the first cylinder 410, the second cylinder 420, several third cylinders 430 and the fourth cylinder 440 should be less than the elastic deformation range of the elastic sheet 610, so as to ensure that the elastic sheet 610 can also abut against the surface of the second block 800 at the end.

[0029] In this embodiment, to prevent the ring 600 from sliding arbitrarily along the surface of the telescopic component 400 when not in use, such as Figure 8 , Figure 13 and Figure 15As shown, the second cylinder 420 has multiple fourth grooves 421 evenly spaced through its outer circumferential surface near the bottom. The elastic sheet 610 has a first protrusion 620 at its bottom end, which is located inside the fourth groove 421. The first protrusion 620 hooks onto the top wall of the fourth groove 421, thus restricting the position of the ring 600 and preventing it from sliding freely. To release the restriction of the first protrusion 620 after the telescopic assembly 400 is fully compressed, as... Figure 8 and Figure 15 As shown, a third locking block 900 is fixedly installed on the bottom wall of each of the multiple fourth grooves 421. A sixth protrusion 920 is formed on the outer surface of the top of the third locking block 900 near the elastic sheet 610, and a fifth protrusion 910 is formed on the outer surface of the top of the third locking block 900 near the spring 1000. A third oblique angle 911 is formed on the upper surface of the fifth protrusion 910. When the fourth cylinder 440 moves down, its bottom end will squeeze the third oblique angle 911, thereby causing the third locking block 900 to elastically deform close to the first protrusion 620. The sixth protrusion 920 squeezes the first protrusion 620, causing it to slide out of the fourth groove 421, thereby releasing the limiting position of the ring 600. This setting can prevent the ring 600 from sliding randomly and affecting subsequent use.

[0030] In this embodiment, when the ring 600 slides to the top of the telescopic component 400, that is, when the negative pressure drainage device finishes collecting liquid, in order to prevent subsequent reuse of the negative pressure drainage device, such as Figure 9 As shown, the outer circumferential surface of the first cylinder 410 is provided with a plurality of third grooves 411. The first protrusion 620 is disposed inside the third groove 411. When the use is finished, the first protrusion 620 at the bottom of the elastic sheet 610 will slide into the third groove 411. When someone wants to use the negative pressure drainage device again, because the first protrusion 620 is stuck inside the third groove 411, when the person presses down, the first protrusion 620 blocks the downward movement of the first cylinder 410, so that the telescopic component 400 cannot be compressed, thereby preventing the disposable pressure drainage device from being reused.

[0031] It should be noted that, in order for the first protrusion 620 to slide smoothly out of the first groove 450, as follows: Figure 6 As shown, the top wall of the first groove 450 is provided with a first oblique angle 451 to ensure that the first protrusion 620 can smoothly slide out of the first groove 450 as the ring 600 moves upward.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A negative pressure drainage component, characterized in that, include: The first plate (100) and the second plate (200) are aligned and their central axes are on the same straight line. Several springs (1000) are equidistantly arranged between the first plate (100) and the second plate (200); Several sets of telescopic components (400) are equidistantly arranged between the first plate (100) and the second plate (200). The several sets of telescopic components (400) include: a first cylinder (410), a second cylinder (420), several third cylinders (430) and a fourth cylinder (440). The first cylinder (410) is disposed on the lower surface of the first plate (100), the second cylinder (420) is disposed on the upper surface of the second plate (200), and the fourth cylinder (440) is inserted into the interior of the second cylinder (420). The first cylinder (410) is sleeved with the second cylinder (420) through a plurality of third cylinders (430) and fourth cylinders (440). The first cylinder (410), the second cylinder (420), the plurality of third cylinders (430) and the fourth cylinder (440) are located on the same axis and can move along the axial direction. The spring (1000) is disposed inside the first cylinder (410), the second cylinder (420), the plurality of third cylinders (430) and the fourth cylinder (440).

2. The negative pressure drainage component according to claim 1, characterized in that, A flexible film (300) is fixedly connected between the first plate (100) and the second plate (200). A receiving cavity is formed between the first plate (100), the second plate (200) and the flexible film (300). Several springs (1000) are disposed inside the receiving cavity. Several sets of telescopic components (400) are disposed inside the receiving cavity. Two hose connectors are fixedly disposed on the upper surface of the first plate (100). Both hose connectors are connected to the receiving cavity.

3. The negative pressure drainage component according to claim 1, characterized in that, The inner walls of the second cylinder (420), the third cylinder (430) and the fourth cylinder (440) are provided with multiple limiting grooves (460) at equal intervals. The end of the limiting groove (460) near the second plate (200) passes through the end face of the third cylinder (430), the second cylinder (420) and the fourth cylinder (440). The outer surfaces of the first cylinder (410), the third cylinder (430) and the fourth cylinder (440) are provided with multiple limiting blocks (470) at equal intervals. The limiting blocks (470) are slidably installed with the inner wall of the limiting groove (460).

4. The negative pressure drainage component according to claim 2, characterized in that, A plurality of first grooves (450) are equidistantly provided on the outer circumference of several third cylinders (430) and fourth cylinders (440). A first locking block (700) is provided between the plurality of first grooves (450) and the inner wall of the second plate (200). The first locking block (700) is L-shaped. A connecting block (710) is fixedly provided on the lower surface of the first locking block (700). The bottom end of the connecting block (710) is fixedly connected to the bottom wall of the first groove (450).

5. The negative pressure drainage assembly according to claim 4, characterized in that, The first locking block (700) has a second protrusion (720) at one end away from the spring (1000), and the first locking block (700) has a third protrusion (730) on the lower surface of the second protrusion (720) relative to the first locking block (700). The connecting block (710) is disposed between the second protrusion (720) and the third protrusion (730).

6. The negative pressure drainage assembly according to claim 5, characterized in that, A plurality of second grooves (480) are equidistantly provided on the outer circumferential surfaces of several third cylinders (430) and first cylinders (410). A second locking block (800) is provided between the inner walls of the plurality of second grooves (480). The top of the second locking block (800) is fixedly connected to the top wall of the second groove (480). A protrusion is provided on the outer surface of the bottom end of the second locking block (800) near the spring (1000). A fourth protrusion (740) is provided on the outer surface of the top end of the first locking block (700) opposite the spring (1000). A second oblique angle (741) is provided on the upper surface of the fourth protrusion (740).

7. The negative pressure drainage component according to claim 6, characterized in that, The outer surface of the second cylinder (420) is fitted with a ring (600), and a plurality of elastic pieces (610) are fixedly arranged at equal intervals on the lower surface of the ring (600). The bottom end of the elastic piece (610) abuts against the outer surface of one side of the second locking block (800). The interior of the receiving cavity is provided with a third plate (500), and the ring (600) is fixedly arranged on the lower surface of the third plate (500). A float (510) is fixedly installed on the lower surface of the third plate (500).

8. The negative pressure drainage assembly according to claim 7, characterized in that, The second cylinder (420) has multiple fourth grooves (421) equidistantly through its outer circumference near the bottom end. The bottom walls of the multiple fourth grooves (421) are fixedly installed with third locking blocks (900). The outer surface of the top of the third locking block (900) near the elastic sheet (610) has a sixth protrusion (920). The outer surface of the top of the third locking block (900) near the spring (1000) has a fifth protrusion (910). The upper surface of the fifth protrusion (910) has a third oblique angle (911). The bottom end of the elastic sheet (610) has a first protrusion (620). The first protrusion (620) is located inside the fourth groove (421). The top wall of the first groove (450) has a first oblique angle (451).

9. The negative pressure drainage assembly according to claim 8, characterized in that, The outer circumferential surface of the first cylinder (410) is provided with a plurality of third grooves (411), and the first protrusion (620) is disposed inside the third groove (411).

10. A negative pressure drainage device, characterized in that, Includes the negative pressure drainage component as described in any one of claims 1-9.

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