Anti-blocking drainage tube capable of being adjusted universally and retaining bone fragments

Abstract

The utility model belongs to the field of medical instruments, and provides an anti-blocking drainage tube capable of being universally adjusted and retaining bone fragments, which comprises a lower cover and an upper cover which are detachably fixed, the upper part of the upper cover is connected with a first drainage tube through a connecting tube, a metal wire is embedded in the connecting tube, and the connecting tube can be bent and shaped according to needs. The orientation and the direction of the first drainage tube are adjusted and limited; the pressing device is fixedly arranged in the upper cover, the spring is arranged between the inner filter table and the outer filter table, the pressing device downwards compresses the spring after the upper cover and the lower cover are fixed, so that the inner filter table abuts against the top of the outer filter screen, the upper cover is opened when the filter screen needs to be replaced, the spring automatically pops up the inner filter screen, and the defect that the filter screen cannot be replaced due to liquid infiltration in the drainage process is overcome. The problems that resistance exists between the inner filter screen and the outer filter screen due to the small gap, the inner filter screen and the outer filter screen are difficult to pull out, pollution is easily caused by manual taking-out, and adverse effects exist on drainage safety are solved.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically relating to a omnidirectionally adjustable drainage tube that can retain bone fragments and prevent blockage. Background Technology

[0002] In clinical surgery, when blood, pus, or exudate accumulates in a patient's body, drainage can be used to remove the fluid and prevent infection and inflammation.

[0003] During the drainage process, impurities such as blood clots, stones, and human tissue often exist in the drainage fluid. The presence of these impurities will gradually reduce the drainage efficiency. Currently, filters are often installed in the drainage tube to solve this problem. However, if the filter is completely blocked, the drainage tube must be completely replaced, and it is difficult to remove bone fragments for procedures such as autologous bone grafting.

[0004] By setting up inner and outer double-layer filters, bone fragments in the drainage fluid can be trapped, and the inner filter can be replaced when the filter becomes clogged. However, when using it, if it is necessary to remove the inner filter, the small gap between the inner and outer filters and the resistance generated by fluid wetting make it difficult to remove the inner filter, and it needs to be removed manually, which may cause unnecessary risks in the drainage process.

[0005] During the drainage process, the impact and turbulence of the fluid can cause misalignment of the filter holes between the inner and outer filter screens, resulting in obstruction of the drainage channel.

[0006] Due to the different surgical sites, the orientation of the drainage tube needs to be adjusted and limited. Existing drainage tubes are difficult to adjust and limit in terms of position and orientation.

[0007] Therefore, there is an urgent need for a non-clogging drainage tube that can retain bone fragments, facilitate the removal of the filter, and is omnidirectionally adjustable. Summary of the Invention

[0008] To address the inconvenience of removing the filter screen from existing anti-clogging drainage tubes and the misalignment of filter holes during drainage, this invention provides an anti-clogging drainage tube that is omnidirectionally adjustable and can retain bone fragments. By setting corresponding limiting protrusions and grooves on the inner and outer filter screens, misalignment of filter holes during drainage and obstruction of the drainage channel are prevented. A spring is installed on the upper part of the outer filter table of the outer filter screen. After the upper and lower covers are installed, the upper and lower parts of the spring abut against the inner and outer filter tables respectively, overcoming the resistance between the inner and outer filter screens and the difficulty in removing the inner filter screen during drainage.

[0009] This invention further achieves circumferential fixation of the inner and outer filter screens by corresponding limiting grooves, limiting protrusions, and alignment marks on the inner and outer filter screens to avoid misalignment of the filter holes; and sets the filter holes of the inner and outer filter screens to be gradually decreasing in diameter along the direction of liquid flow, which ensures drainage efficiency and can also efficiently retain bone fragments.

[0010] This utility model provides a omnidirectionally adjustable anti-clogging drainage tube that can retain bone fragments, including a lower cover and an upper cover detachably fixed above the lower cover, an outer filter screen disposed inside the lower cover, and an inner filter screen disposed inside the outer filter screen. The inner filter screen has an inner filter platform at its top, and the outer filter screen has an outer filter platform on its outer periphery. A clamping device is fixedly installed inside the upper cover. A spring is installed between the inner and outer filter platforms and on the outer periphery of the outer filter screen. After the upper and lower covers are installed, the upper and lower parts of the spring abut against the inner and outer filter platforms, respectively. The inner filter platform abuts against the top of the outer filter screen. The inner and outer filter screens are respectively provided with inner filter holes and outer filter holes. After the upper and lower covers are fixed, the positions of the inner and outer filter holes correspond one-to-one. An inward limiting protrusion is provided extending from top to bottom inside the outer filter screen, and a limiting groove is provided on the outside of the inner filter screen corresponding to the limiting protrusion.

[0011] The clamping device inside the top cover allows the inner filter platform to be pressed down when the top cover is installed on top of the bottom cover, thereby compressing the spring. After the top and bottom covers are installed, the spring is compressed until the bottom of the inner filter platform is exactly in contact with the top of the outer filter screen, and the positions of the inner and outer filter holes correspond one-to-one. When the inner filter screen needs to be removed during or after the drainage process, the spring gradually returns to its original position when the top cover is opened, and the inner filter screen automatically pops up as the top cover is opened. This overcomes the problem that during the drainage process, the liquid wetting causes resistance between the inner and outer filter screens due to the small gap, making them difficult to pull out, and manual removal is prone to contamination and has an adverse impact on the safety of the drainage process.

[0012] The limiting groove and limiting protrusion work together. When the inner filter screen is placed inside the outer filter screen, the limiting protrusion is engaged in the limiting groove. When the pressing device of the upper cover squeezes the inner filter table, and when the liquid passes through during the drainage process, friction may be generated, causing the inner filter screen and the outer filter screen to rotate relative to each other, resulting in misalignment and misalignment of the inner and outer filter holes. This problem can be overcome by the cooperation between the limiting groove and the limiting protrusion.

[0013] Preferably, the upper part of the upper cover is connected to the first drainage pipe through a connecting pipe, the connecting pipe having an embedded metal wire, one end of the lower cover is connected to the second drainage pipe, a snap-fit ​​platform is provided on the inner side of the lower cover, an outer filter platform is provided on top of the snap-fit ​​platform, and the outer filter extends in a cylindrical shape at the upper part of the outer filter platform.

[0014] The metal wire inside the connecting tube allows for bending and shaping as needed, enabling adjustment and limitation of the orientation and position of the first drainage tube.

[0015] Preferably, the clamping device is a limiting post, which is a hollow cylindrical structure fixedly installed inside the upper cover, and the inner diameter of the limiting post is larger than the inner diameter of the inner filter screen.

[0016] When the upper cover is fixed above the lower cover, the limiting post of the clamping device presses down on the inner filter table and compresses the spring. After the fixation is completed, the lower part of the inner filter table abuts against the upper edge of the outer filter screen. At this time, the positions of the inner filter holes and the outer filter holes are completely aligned and correspond one by one, and the installation of the inner and outer filter screens can be completed.

[0017] Preferably, the inner filter holes and the outer filter holes correspond one-to-one, and their pore diameters gradually decrease from top to bottom.

[0018] If the internal and external filter holes are of uniform diameter, a larger hole diameter will make it difficult to retain bone fragments, while a smaller hole diameter will make the filter more prone to clogging, affecting the drainage effect and making it difficult to balance drainage efficiency and bone fragment retention capacity.

[0019] By setting the filter holes to have a uniformly smaller diameter from top to bottom, it is possible to ensure that the liquid can pass through smoothly and guarantee the drainage efficiency. At the same time, because the lower filter holes have a smaller diameter, impurities such as bone fragments are retained below the filter screen under the impact of the fluid, thus achieving both high drainage efficiency and high bone fragment retention performance.

[0020] Preferably, a first alignment mark and a second alignment mark are respectively provided on the outer filter table and the inner filter table. The first alignment mark and the second alignment mark can be set by means of protrusion, recess, eye-catching color or other easy-to-identify method.

[0021] When placing the inner filter, you can check the alignment marks to see if the inner and outer filters are aligned, ensuring that the filter holes are in the correct positions.

[0022] Preferably, the metal wire is made of stainless steel, and one or more drainage holes can be provided on the front side wall of the first drainage tube to facilitate intraoperative drainage and increase the drainage range of the first drainage tube.

[0023] Preferably, the lower part of the upper cover is provided with an external thread, and the upper part of the inner side of the lower cover is provided with an internal thread. The upper cover and the lower cover are connected by threads, and a sealing ring is provided at the threaded connection between the upper cover and the lower cover.

[0024] As a further preferred embodiment, a groove is provided on the lower part of the inner side of the top cover, and the groove corresponds to the outer edge of the outer filter table.

[0025] When the upper cover is threaded onto the lower cover, the groove on the inner side of the upper cover and the snap-fit ​​platform on the inner side of the lower cover together form a limiting space, which overlaps the outer edge of the outer filter table within the limiting space.

[0026] Alternatively, the top and bottom covers can be fixed together using snap fasteners.

[0027] Preferably, the upper cover has a first protrusion on its outer surface, and the lower cover has an arc-shaped protrusion and a second protrusion on its outer surface;

[0028] The raised areas on the outside of the top and bottom covers improve the grip and increase friction.

[0029] Preferably, a Robert clamp is provided on the second drainage tube.

[0030] During the drainage process, when it is necessary to clean or replace the filter screen, the Robert clamp can be closed to shut off the second drainage tube and prevent liquid backflow.

[0031] Preferably, the side wall of the top cover is provided with a one-way hole. During the drainage process, the one-way hole can be opened to introduce air to adjust the suction pressure. A cap is provided at the one-way hole. When the drainage pressure is too high and adjustment is required, the cap can be opened.

[0032] The method of use is as follows: Install the outer filter, spring, and inner filter inside the lower cover, and then fix the upper cover on top of the lower cover to complete the assembly. Before use, adjust the shape of the connecting tube to ensure that the orientation of the first drainage tube meets the usage requirements. The stainless steel wire inside the connecting tube will keep the connecting tube in its set shape. During drainage, because the lower hole of the filter is small, liquid can flow through, but small bone fragments are retained. After a large number of bone fragments are retained in the filter, close the Robert clamp, open the upper cover, and the inner filter will automatically pop out. Remove the inner filter and spring and place them properly, then close the upper cover and open the Robert clamp. You can continue to use the outer filter for drainage; alternatively, you can replace it with a new spare inner filter and spring and continue drainage.

[0033] The anti-clogging drainage tube provided by this utility model achieves the following beneficial effects:

[0034] 1) The top of the cover is connected to the first drainage tube through a connecting tube. A metal wire is embedded in the connecting tube. The connecting tube can be bent and shaped as needed through the metal wire to adjust and limit the orientation and position of the first drainage tube.

[0035] 2) A spring is installed on the top of the outer filter table, and a clamping device is fixed inside the top cover. When the filter screen needs to be replaced or cleaned, the spring gradually returns to its original position when the top cover is opened. The inner filter screen can be automatically popped out as the top cover is opened. This overcomes the problem that during the drainage process, the liquid wetting causes resistance between the inner and outer filter screens due to the small gap, making them difficult to pull out. Manual removal is also prone to contamination and has an adverse impact on the drainage safety.

[0036] 3) The filter holes of the inner and outer filters are set to gradually decrease in size from top to bottom. This ensures that the liquid can pass through smoothly and guarantees the drainage efficiency. At the same time, because the filter holes at the bottom are smaller, impurities such as bone fragments are retained at the bottom of the filter under the impact of the fluid. This can achieve both high drainage efficiency and high bone fragment retention performance.

[0037] 4) Limiting grooves and limiting protrusions are respectively set on the inner and outer filter screens. The limiting grooves and limiting protrusions work together. When the inner filter screen is placed inside the outer filter screen, the limiting protrusions are engaged in the limiting grooves. When the upper cover squeezes the inner filter platform, and when the liquid passes through during the drainage process, friction may be generated, causing the inner and outer filter screens to rotate relative to each other, resulting in misalignment and misalignment of the inner and outer filter holes. This problem can be overcome by the cooperation between the limiting grooves and limiting protrusions.

[0038] 5) Set alignment marks on the inner and outer filter platforms. During installation, the relative positions of the inner and outer filter screens can be determined by the position of the alignment marks. Attached Figure Description

[0039] Figure 1 A schematic diagram of a omnidirectionally adjustable drainage tube that can retain bone fragments and prevent blockage;

[0040] Figure 2 A schematic diagram of the internal structure of a omnidirectionally adjustable drainage tube that can retain bone fragments and prevent blockage.

[0041] Figure 3 This is a schematic diagram of the internal structure after the upper and lower covers are installed.

[0042] Figure 4 for Figure 3 Enlarged view of section A;

[0043] Figure 5 This is a schematic diagram of the external filter screen;

[0044] Figure 6 This is a schematic diagram of the internal filter screen;

[0045] Figure 7 This is a schematic diagram of the anti-blockage drainage tube structure when the top cover is not installed.

[0046] Wherein: 1 is the first drainage tube; 1-1 is the drainage hole; 2 is the connecting tube; 2-1 is the stainless steel wire; 3 is the upper cover; 3-1 is the first protrusion; 3-2 is the limiting post; 4 is the lower cover; 4-1 is the arc-shaped protrusion; 4-2 is the second protrusion; 4-3 is the snap-fit ​​platform; 5 is the second drainage tube; 6 is the Robert clamp; 7 is the spring; 8 is the sealing ring; 9 is the outer filter screen; 9-1 is the limiting protrusion; 9-2 is the first alignment mark; 9-3 is the outer filter hole; 10 is the inner filter screen; 10-1 is the limiting groove; 10-2 is the second alignment mark; 10-3 is the inner filter hole. Detailed Implementation

[0047] The technical solution of this utility model will be further described below with reference to specific embodiments. These embodiments are only used to illustrate the technical solution of this utility model in more detail and should not be construed as limiting the scope of protection of this utility model. Except for the specific structures described in the embodiments below, other structures of the drainage tube can be directly referred to in the prior application, application number 2024103328295, entitled "An Anti-clogging Filter Suction Drainage Tube".

[0048] Example 1

[0049] A omnidirectionally adjustable drainage tube that can retain bone fragments and prevent blockage, such as Figure 1-3 As shown, it includes a lower cover 4 and an upper cover 3 that is detachably fixed above the lower cover 4. The other end of the lower cover 4 relative to the upper cover 3 is connected to the second drainage tube 5, and the upper part of the upper cover 3 is connected to the first drainage tube 1 through a connecting tube 2.

[0050] The inner side of the lower cover 4 is provided with a snap-fit ​​platform 4-3, such as Figure 5 and Figure 6 As shown, an outer filter platform is provided on the outer periphery of the outer filter screen 9, and the outer filter platform is located on the top of the snap-fit ​​platform 4-3. The outer filter screen 9 extends in a cylindrical shape at the upper part of the outer filter platform, and an inner filter screen 10 is provided inside the outer filter screen 9.

[0051] The connecting tube 2 is embedded with a stainless steel wire 2-1. Through the action of the stainless steel wire 2-1, the connecting tube 2 can be bent and shaped as needed to adjust and limit the orientation and position of the first drainage tube 1.

[0052] The inner filter screen 10 is provided with an inner filter platform at the top. The upper cover 3 is fixedly provided with a limiting post 3-2 as a pressing device. A spring 7 is provided between the inner filter platform and the outer filter platform and on the outer periphery of the outer filter screen 9. After the upper cover 3 and the lower cover 4 are installed, the upper and lower parts of the spring 7 abut against the inner filter platform and the outer filter platform respectively. The inner filter platform abuts against the top of the outer filter screen 9. The inner filter screen 10 and the outer filter screen 9 are respectively provided with inner filter holes 10-3 and outer filter holes 9-3. After the upper cover 3 and the lower cover 4 are fixed, the positions of the inner filter holes 10-3 and the outer filter holes 9-3 correspond one-to-one.

[0053] A limiting post 3-2 is set inside the upper cover 3. The limiting post 3-2 is a hollow cylindrical structure fixed inside the upper cover 3. The inner diameter of the limiting post 3-2 is larger than the inner diameter of the inner filter screen 10. When the upper cover 3 is installed above the lower cover 4, the limiting post 3-2 can press down on the inner filter platform, thereby compressing the spring 7. After the upper cover 3 and the lower cover 4 are installed, the bottom of the inner filter platform is exactly in contact with the top of the outer filter screen 9. The positions of the inner filter hole 10-3 and the outer filter hole 9-3 correspond one-to-one. When the inner filter screen 10 needs to be removed during or after the drainage process, the upper cover 3 is opened to allow the spring 7 to gradually return to its original position. As the upper cover 3 is opened, the inner filter screen 10 automatically pops up. This overcomes the problem that during the drainage process, due to the wetting of the liquid, there is resistance between the inner filter screen 10 and the outer filter screen 9 due to the small gap, making it difficult to pull out. Manual removal is also prone to contamination and has an adverse effect on the safety of drainage.

[0054] One or more drainage holes 1-1 may be provided on the front end sidewall of the first drainage tube 1 to facilitate intraoperative drainage and increase the drainage range of the first drainage tube 1.

[0055] The inner filter hole 10-3 and the outer filter hole 9-3 correspond one-to-one, and their pore diameters gradually decrease from top to bottom.

[0056] By setting the filter holes to have a uniformly smaller diameter from top to bottom, it is possible to ensure that the liquid can pass through smoothly and guarantee the drainage efficiency. At the same time, because the lower filter holes have a smaller diameter, impurities such as bone fragments are retained below the filter screen under the impact of the fluid, thus achieving both high drainage efficiency and high bone fragment retention performance.

[0057] An inwardly extending limiting protrusion 9-1 is provided inside the outer filter screen 9 from top to bottom, and a limiting groove 10-1 is provided on the outside of the inner filter screen 10 corresponding to the limiting protrusion 9-1.

[0058] The limiting groove 10-1 and the limiting protrusion 9-1 work together. When the inner filter screen 10 is placed inside the outer filter screen 9, the limiting protrusion 9-1 is engaged in the limiting groove 10-1. When the limiting post 3-2 of the upper cover 3 squeezes the inner filter platform, and when the liquid passes through during the drainage process, friction may be generated, causing the inner filter screen 10 and the outer filter screen 9 to rotate relative to each other. This results in the inner filter hole 10-3 and the outer filter hole 9-3 being misaligned and unable to be aligned. This problem can be overcome by the cooperation between the limiting groove 10-1 and the limiting protrusion 9-1.

[0059] A first alignment mark 9-2 and a second alignment mark 10-2 are respectively set on the outer filter table and the inner filter table. The first alignment mark 9-2 and the second alignment mark 10-2 can be set by means of protrusion, recess, eye-catching color or other easy-to-identify method.

[0060] When placing the inner filter 10, the alignment mark can be used to determine whether the inner filter 10 and the outer filter 9 are aligned, ensuring that the filter holes are in the correct positions.

[0061] like Figure 4 As shown, the lower part of the upper cover 3 is provided with an external thread, and the upper part of the inner side of the lower cover 4 is provided with an internal thread. The lower cover and the lower cover are connected by threads, and a sealing ring 8 is provided at the threaded connection between the upper cover and the lower cover.

[0062] A groove is provided on the lower inner side of the upper cover 3, and the groove corresponds to the outer edge of the outer filter table.

[0063] When the upper cover 3 is threaded onto the lower cover 4, the groove on the inner side of the upper cover 3 and the snap-fit ​​platform 4-3 on the inner side of the lower cover 4 together form a limiting space, and the outer edge of the outer filter table overlaps in the limiting space.

[0064] Preferably, the upper cover 3 has a first protrusion 3-1 on its outer side, and the lower cover 4 has an arc-shaped protrusion 4-1 and a second protrusion 4-2 on its outer side;

[0065] The raised areas on the outside of the top cover 3 and the bottom cover 4 can improve the grip feel and increase friction.

[0066] A Robert clamp 6 is installed on the second drainage tube 5.

[0067] During the drainage process, when it is necessary to clean or replace the filter screen, the Robert clamp 6 can be closed to shut off the second drainage tube 5 and prevent liquid backflow.

[0068] The side wall of the top cover 3 is provided with a one-way hole. During the drainage process, the one-way hole can be opened to introduce air to adjust the suction pressure. A cap is provided at the one-way hole. When the drainage pressure is too high and adjustment is required, the cap can be opened.

[0069] Figure 7 The diagram shows the inner filter 10 and outer filter 9 inside the lower cover 4 when the upper cover 3 is not installed. At this time, because the spring 7 has a certain elastic modulus, it applies an elastic support force to the inner filter platform of the inner filter 10, causing the inner filter 10 to move upward a distance h relative to the outer filter 9. At this time, the positions of the inner filter hole 10-3 and the outer filter hole 9-3 cannot correspond one-to-one. After the upper cover 3 is installed, the limiting post 3-2 presses down on the inner filter platform and the spring 7. After the upper cover 3 and the lower cover 4 are fixed, the inner filter 10 and the outer filter 9 reach the corresponding positions, so that the positions of the inner filter hole 10-3 and the outer filter hole 9-3 correspond one-to-one.

[0070] The method of use is as follows: Install the outer filter screen 9, spring 7, and inner filter screen 10 inside the lower cover 4. After fixing the upper cover 3 above the lower cover 4, the assembly is complete. Before use, adjust the shape of the connecting tube 2 so that the orientation of the first drainage tube 1 meets the usage requirements. The stainless steel wire 2-1 inside the connecting tube 2 can keep the connecting tube 2 in the set shape. During drainage, because the lower hole of the filter screen is small, the liquid can flow through, but small bone fragments are retained. After a large number of bone fragments are retained in the filter screen, close the Robert clamp 6, open the upper cover 3, and the inner filter screen 10 will pop out automatically. After taking out the inner filter screen 10 and spring 7 and placing them properly, close the upper cover 3 and open the Robert clamp 6 to continue drainage; alternatively, replace with a new spare inner filter screen 10 and spring 7 and continue drainage.

[0071] Using this anti-clogging drainage tube can significantly reduce the time spent due to tube blockage and improve efficiency. After drainage is completed, the inner filter 10 and outer filter 9 can be cleaned directly, and the bone fragments can be picked out and kept for later use.

[0072] Example 2

[0073] The adjustable drainage tube in this embodiment, which can retain bone fragments, has the same structure as that in Embodiment 1. The only difference is that the upper and lower covers are fixedly connected by a snap fastener.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any equivalent substitutions or modifications made by those skilled in the art within the spirit and principle of the present utility model without any creative effort shall be included within the protection scope of the present utility model.

Claims

1. A omnidirectionally adjustable drainage tube capable of retaining bone fragments, comprising a lower cover (4), an upper cover (3) detachably fixed above the lower cover (4), an outer filter (9) disposed within the lower cover (4), and an inner filter (10) disposed within the outer filter (9), characterized in that: The inner filter screen (10) is provided with an inner filter platform at the top, and the outer filter screen (9) is provided with an outer filter platform on its outer periphery. The upper cover (3) is fixedly provided with a pressing device. A spring (7) is provided between the inner filter platform and the outer filter platform and on the outer periphery of the outer filter screen (9). The upper and lower parts of the spring (7) abut against the inner filter platform and the outer filter platform respectively. The inner filter platform abuts against the top of the outer filter screen (9). The inner filter screen (10) and the outer filter screen (9) are respectively provided with inner filter holes (10-3) and outer filter holes (9-3). After the upper cover (3) and the lower cover (4) are fixed, the positions of the inner filter holes (10-3) and the outer filter holes (9-3) correspond one-to-one. An inward limiting protrusion (9-1) is provided inside the outer filter screen (9) from top to bottom. A limiting groove (10-1) is provided outside the inner filter screen (10) corresponding to the limiting protrusion (9-1).

2. The anti-blockage drainage tube according to claim 1, characterized in that, The upper part of the upper cover (3) is connected to the first drainage pipe (1) through the connecting pipe (2), and the connecting pipe (2) is embedded with metal wire; one end of the lower cover (4) is connected to the second drainage pipe (5), and the inner side of the lower cover (4) is provided with a snap-fit ​​platform (4-3); the outer filter platform is set on the top of the snap-fit ​​platform (4-3), and the outer filter screen (9) extends in a cylindrical shape at the upper part of the outer filter platform.

3. The anti-blockage drainage tube according to claim 1, characterized in that, The pressing device is a limiting post (3-2), which is a hollow cylindrical structure fixedly installed inside the upper cover (3). The inner diameter of the limiting post (3-2) is larger than the inner diameter of the inner filter screen (10).

4. The anti-blockage drainage tube according to claim 1, characterized in that, The inner filter holes (10-3) and the outer filter holes (9-3) correspond one-to-one, and their diameters gradually decrease from top to bottom.

5. The anti-blockage drainage tube according to claim 1, characterized in that, A first alignment mark (9-2) and a second alignment mark (10-2) are respectively set on the outer filter table and the inner filter table.

6. The anti-blockage drainage tube according to claim 2, characterized in that, The metal wire is made of stainless steel (2-1); one or more drainage holes (1-1) are provided on the front end side wall of the first drainage tube (1).

7. The anti-blockage drainage tube according to any one of claims 1-6, characterized in that, The upper cover (3) is provided with an external thread at the bottom, and the lower cover (4) is provided with an internal thread at the upper inner side. The upper cover (3) and the lower cover (4) are connected by threads, and a sealing ring (8) is provided at the threaded connection between the upper cover (3) and the lower cover (4).

8. The anti-blockage drainage tube according to claim 7, characterized in that, A groove is provided on the lower inner side of the upper cover (3), and the groove corresponds to the outer edge of the outer filter table. When the upper cover (3) is threaded and fixed above the lower cover (4), the groove on the inner side of the upper cover (3) and the snap-fit ​​platform (4-3) on the inner side of the lower cover (4) together form a limiting space, and the outer edge of the outer filter table overlaps in the limiting space.

9. The anti-blockage drainage tube according to any one of claims 1-6, characterized in that, The upper cover (3) and the lower cover (4) are fixedly connected by snap fasteners.

10. The anti-blockage drainage tube according to claim 2, characterized in that, The upper cover has a first protrusion (3-1) on its exterior, the lower cover (4) has an arc-shaped protrusion (4-1) and a second protrusion (4-2) on its exterior, the second drainage tube (5) has a Robert clip (6), the side wall of the upper cover has a one-way hole, and a hole cap is provided at the one-way hole.

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