Drainage tube convenient to dredge

Abstract

The invention relates to the technical field of medical instruments, in particular to a drainage tube convenient to dredge, which comprises a catheter mechanism, a drainage catheter, an in-body catheter arranged at one end of the drainage catheter, and a joint tube and a dredging mechanism which are arranged at one end of the drainage catheter far away from the in-body catheter, the device comprises a shell movably installed on the drainage catheter, and further comprises a supporting assembly arranged in the shell and a dredging assembly rotationally installed on the supporting assembly, and the dredging assembly comprises a sleeve shell part arranged outside the drainage catheter and pressing roller parts rotationally installed in an inner cavity of the sleeve shell part in an annular array; by means of the drainage tube dredging device, the problems that when the drainage tube is blocked, dredging is not easy due to the fact that manual kneading dredging force is small, the drainage tube is easy to seal due to the fact that the force is too large, and therefore a patient is injured are solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a drainage tube which is easy to clear. Background Art

[0002] In the medical field, drainage tubes, as a key therapeutic auxiliary tool, are widely used in various clinical scenarios such as surgical operations, pleural and abdominal effusion drainage, and wound drainage. Their main function is to continuously and effectively drain accumulated fluid, blood, pus or gas from the body to promote wound healing, reduce tissue pressure, prevent infection and monitor changes in the disease.

[0003] During the use of drainage tubes, blockage of drainage tubes is a common problem. Blockage of drainage tubes can be caused by a variety of factors, including but not limited to blood clots, tissue fragments, pus coagulation, drug precipitation, bacterial biofilm formation, etc. Once the drainage tube is blocked, it will not only affect the drainage effect and delay the patient's recovery process, but also may cause local pressure to increase due to poor drainage, causing infection, tissue necrosis and other serious complications. Therefore, it is necessary to clear the drainage tube in a timely and effective manner.

[0004] Commonly used unblocking methods include manual rubbing of the blocked area and flushing with saline. Although manual rubbing can physically cause the blockage to move or deform, and then be sucked away by the negative pressure suction device, this method has significant limitations. First, the operator's strength control is extremely critical. If it is too light, the blockage cannot be effectively loosened. If it is too heavy, the drainage tube will be pinched and blocked, making the negative pressure ineffective, and even causing fluid backflow, increasing the risk of infection. In order to solve this problem, we propose a drainage tube that is easy to dredge. Summary of the invention

[0005] The present invention is proposed in view of the problem that when manually rubbing the drainage tube to clear the blockage, if too little force is used, the blockage is difficult to clear, while if too much force is used, the drainage tube may be easily blocked, thereby causing the liquid in the drainage tube to flow back and increase the risk of infection.

[0006] Therefore, an object of the present invention is to provide a drainage tube that is easy to dredge.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a drainage tube that is easy to clear, including a catheter mechanism, which includes a drainage catheter, an in-body catheter arranged at one end of the drainage catheter, and a connecting tube arranged at the end of the drainage catheter away from the in-body catheter, a clearing mechanism, which includes a shell movably mounted on the drainage catheter, a support assembly arranged in the shell, and a clearing assembly rotatably mounted on the support assembly, the clearing assembly includes a shell member arranged outside the drainage catheter, and a roller member rotatably mounted in the inner cavity of the shell member in an annular array, and the inner diameter of the roller member is smaller than the outer diameter of the drainage catheter.

[0008] As a preferred solution of the drainage tube for easy dredging of the present invention, the shell member is composed of a first shell and a second shell, and the first shell and the second shell are matched to be sleeved on the outside of the drainage catheter in a round tube shape.

[0009] As a preferred solution of the drainage tube that is easy to clear in the present invention, the support assembly includes vertical plates symmetrically arranged in the shell, and two vertical plates are rotatably installed with frustum sleeves on opposite sides, and connecting frustums are matched at both ends of the first shell and the second shell, and the connecting frustum and the frustum sleeve are butt-matched.

[0010] As a preferred solution of the drainage tube that is easy to clear in the present invention, a ejector groove is provided on one side of the first shell close to the second shell, and a compression spring and an ejector are arranged inside the ejector groove.

[0011] As a preferred solution of the drainage tube that is easy to dredge in the present invention, movable grooves are provided on both sides of the bottom end of the shell, and a movable block is movably installed in the movable groove, one end of the movable block is fixedly connected to the bottom end of the vertical plate, and the other end of the movable block passes through the movable groove and extends to the bottom of the shell and is fixedly connected to a driving finger plate, limiting blocks are provided on the upper ends of both sides of the vertical plate, limiting grooves are provided on both sides of the inner cavity of the shell, and the limiting grooves and limiting blocks are slidably matched.

[0012] As a preferred solution of the drainage tube that is easy to clear in the present invention, a first tension spring is arranged on one side of the vertical plate away from the frustum sleeve, and the other end of the first tension spring is fixedly connected to the inner wall of the shell.

[0013] As a preferred solution of the drainage tube that is easy to clear in the present invention, catheter holes are provided at both ends of the shell, and a first clamping ring and a second clamping ring matching the drainage catheter are installed at both ends of the shell through a rotating shaft, and the first clamping ring and the second clamping ring are both provided with raised rubber sheets.

[0014] As a preferred solution of the drainage tube that is easy to dredge in the present invention, a sliding rod is provided on one side of the shell where the first clamping ring and the second clamping ring are fitted, and a sliding groove matching the sliding rod is opened on the shell, a second tension spring is provided in the sliding groove, and the two ends of the second tension spring are respectively connected to the inner wall of the sliding groove and the side wall of the sliding rod.

[0015] As a preferred solution of the drainage tube that is easy to clear in the present invention, one end of the outer wall of the first and second clamping rings away from the rotating shaft is connected to a pull rope, and the other end of the pull rope is fixedly connected to the driving finger plate.

[0016] As a preferred solution of the drainage tube that is easy to dredge in the present invention, cross bars are provided at both ends of the drainage tube, and leads are provided between the cross bars, a plurality of magnetic balls are provided in a linear array on the lead wires, the pressure roller member is composed of a non-magnetic roller and a magnetic roller, and only one magnetic roller is provided, and the magnetic roller and the magnetic ball are magnetically matched.

[0017] The beneficial effects of the drainage tube that is easy to dredge of the present invention are:

[0018] 1. In the present invention, when the drainage catheter does not need to be dredged, the first shell and the second shell are separated under the action of the push rod, and no squeezing force is generated on the drainage catheter. At the same time, the first clamp ring and the second clamp ring are also expanded, so that the entire dredging mechanism can slide in the drainage catheter. When a blockage occurs at a certain position on the drainage catheter, the dredging mechanism can slide along the drainage catheter to the blocked position, and then the first clamp ring and the second clamp ring are annular by pressing the driving finger plate, and friction is generated between the convex rubber sheet and the outer wall of the drainage catheter, thereby fixing the position of the shell, and the dredging component squeezes the drainage catheter, and then the drainage catheter can be rubbed and dredged by rotating the dredging component, thereby achieving dredging of blockage at any position on the drainage catheter.

[0019] 2. The unblocking component of the present invention is provided with a circular array of pressure rollers, so that after the rollers are squeezed on the side wall of the drainage duct, the compressed side wall of the drainage duct presents a circular wave shape, and then the unblocking component is rotated to change the position of the wave deformation of the drainage duct, thereby unblocking the blockage in the drainage duct and avoiding manual rubbing of the drainage tube, which may cause temporary sealing of the drainage tube due to excessive force, thereby causing backflow in the drainage tube.

[0020] 3. In the present invention, a magnetic roller is provided in the pressure roller member of the annular array, and the rest are non-magnetic rollers, so that when the dredging component rotates to rub the drainage catheter, the magnetic roller will attract the magnetic ball on the lead wire, so that the lead wire at the blocked part is pulled and bent, and as the dredging component rotates, the lead wire is stirred in the drainage catheter, thereby improving the dredging effect of the drainage tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 An overall schematic diagram of the drainage tube for easy dredging.

[0023] Figure 2 A schematic diagram of the structure of the dredging mechanism of the drainage tube for easy dredging.

[0024] Figure 3 Schematic diagram of the exploded structure of the dredging component of the drainage tube for easy dredging.

[0025] Figure 4 A schematic diagram of the cross-sectional structure of the movable groove on the shell of the dredging mechanism of the drainage tube for easy dredging.

[0026] Figure 5 A schematic diagram of the position structure of the slide groove, the second tension spring and the slide rod of the drainage tube at one end of the shell for easy dredging.

[0027] Figure 6 for Figure 5 Enlarged structural diagram at A in the middle.

[0028] Figure 7 It is a schematic diagram of the structure of the guide wire and magnetic ball in the drainage catheter.

[0029] Labels: 1. catheter mechanism; 101. drainage catheter; 102. in-body catheter; 103. joint pipe; 2. dredging mechanism; 201. shell; 202. movable groove; 203. limit groove; 204. catheter through hole; 205. slide; 3. support assembly; 301. vertical plate; 302. cone sleeve; 303. movable block; 304. driving finger plate; 305. limit block; 4. dredging assembly; 5. shell member; 501, first shell; 502, second shell; 503, connecting cone; 504, ejector groove; 505, extrusion spring; 506, ejector; 6, pressure roller; 601, non-magnetic roller; 602, magnetic roller; 7, first tension spring; 8, first retaining ring; 9, second retaining ring; 10, raised rubber sheet; 11, sliding rod; 12, second tension spring; 13, pull rope; 14, cross bar; 15, lead wire; 16, magnetic ball. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1, reference Figures 1 to 4 , which is the first embodiment of the present invention, and provides a drainage tube that is easy to dredge, and can achieve standardized kneading of the blocked position of the drainage catheter 101, so as to achieve the purpose of dredging the drainage catheter 101. It includes a catheter mechanism 1, which includes a drainage catheter 101, and also includes an in-body catheter 102 arranged at one end of the drainage catheter 101, and a joint tube 103 arranged at the end of the drainage catheter 101 away from the in-body catheter 102. The in-body catheter 102 is used to be inserted into the human body, and the in-body catheter 102 and the drainage catheter 101 are integrated. A boundary mark is provided at the junction of the in-body catheter 102 and the drainage catheter 101, which is used to indicate that the in-body catheter 102 is completely inserted into the human body without excessive insertion. The joint tube 103 is a Y-shaped branch tube, and is plug-connected with one end of the drainage catheter 101, and the Y-shaped ends of the joint tube 103 are respectively used to connect a drainage bag and sterile saline for injecting and dredging the drainage catheter 101.

[0034] The unblocking mechanism 2 includes a shell 201 movably mounted on the drainage catheter 101, a support assembly 3 arranged in the shell 201, and a unblocking assembly 4 rotatably mounted on the support assembly 3. The unblocking mechanism 2 is movably sleeved on the outside of the drainage catheter 101 and can slide on the outside of the drainage catheter 101, so as to unblock any blocked position on the drainage catheter 101.

[0035] Specifically, catheter holes 204 are provided at both ends of the shell 201, and the diameter of the catheter hole 204 is larger than the outer diameter of the drainage catheter 101, so that it can move smoothly on the drainage catheter 101. Two support components 3 are provided, respectively arranged at the two ends of the shell 201, and then the clearing component 4 can be rotatably installed inside the shell 201 through the two support components 3.

[0036] The dredging component 4 includes a casing member 5 disposed outside the drainage catheter 101, and a pressure roller member 6 rotatably installed in the inner cavity of the casing member 5 in an annular array.

[0037] The shell member 5 is composed of a first shell 501 and a second shell 502 , and the first shell 501 and the second shell 502 match each other in a round tube shape and are sleeved on the outside of the drainage catheter 101 .

[0038] In this embodiment, the first shell 501 and the second shell 502 are split. When they are matched and sleeved on the outside of the drainage catheter 101 in a circular tubular shape, the inner diameter of the pressure roller 6 is smaller than the outer diameter of the drainage catheter 101, thereby squeezing the drainage catheter 101. The drainage catheter 101 is squeezed from a circular tubular shape to a wavy annular tube, so that the blockage inside it is squeezed and deformed. At this time, the shell part 5 is rotated to change the squeezing position of the drainage catheter 101 by the pressure roller 6 in the inner cavity, so that the deformation caused by the squeezing of the internal blockage is constantly changing, and then under the action of negative pressure, the blockage is separated from the blocked position and sucked away, thereby achieving the dredging of the drainage catheter 101.

[0039] Although the inner diameter of the pressing roller 6 is smaller than the outer diameter of the drainage catheter 101 , the drainage catheter 101 cannot be completely squeezed and sealed, so that there is still a gap for the drainage catheter 101 to flow after being squeezed.

[0040] It should be noted that when rotating the shell member 5 for dredging, it should be rotated once, and then the matched first shell 501 and the second shell 502 should be separated, and then the first shell 501 and the second shell 502 should be fitted and matched. This process is to allow the blockage in the drainage catheter 101 to be better dredged, because the first shell 501 and the second shell 502 are always matched, so that the pressure roller member 6 always squeezes the drainage catheter 101 to cause the blockage to deform and slowly be drawn out by negative pressure. However, due to the continuous squeezing of the drainage catheter 101, the diameter of the tube will always be in a small diameter state, which is actually not conducive to dredging, because the first shell 501 and the second shell 502 need to be repeatedly matched and separated to improve the dredging efficiency.

[0041] The support assembly 3 includes vertical plates 301 symmetrically arranged in the shell 201, and a frustum sleeve 302 is rotatably installed on the opposite side of the two vertical plates 301. Both ends of the first shell 501 and the second shell 502 are matched with connecting cones 503, and the connecting cone 503 and the frustum sleeve 302 are docked and matched.

[0042] In this embodiment, the connecting cone 503 is divided into two parts, which are respectively arranged at the axial ends of the first shell 501 and the second shell 502. When the first shell 501 and the second shell 502 are matched, the connecting cone 503 is formed, and the interior of the connecting cone 503 is a penetrating cavity, which is connected with the inner cavities of the first shell 501 and the second shell 502 for the penetration of the drainage catheter 101.

[0043] Furthermore, the large-diameter end of the cone sleeve 302 is away from the vertical plate 301, while the large-diameter end of the connecting cone 503 is fixedly connected to the end of the sleeve shell 5, wherein the width of the two vertical plates 301 is the same as the inner cavity of the shell 201, and the vertical plate 301 can move horizontally along its length direction in the shell 201, thereby adjusting the matching state between the cone sleeve 302 and the connecting cone 503.

[0044] Specifically, when the conical sleeves 302 on the two vertical plates 301 are away from the connecting conical cone 503 on the shell member 5, the first shell 501 and the second shell 502 are pushed to separate from each other by the restoring force of the deformation of the drainage duct 101. When the conical sleeves 302 on the two vertical plates 301 approach the connecting conical cone 503 on the shell member 5, so that the inner wall of the conical sleeve 302 and the outer wall of the connecting conical cone 503 fit together, the first shell 501 and the second shell 502 fit together, thereby squeezing the drainage duct 101 to deform. At this time, the first shell 501 and the second shell 502 can be rotated to fit together, so that the blockage in the drainage duct 101 can be rubbed and cleared by the roller member 6.

[0045] Example 2, reference Figures 1 to 6 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a first clamping ring 8, a second clamping ring 9 and a convex rubber sheet 10 for dredging the drainage tube, which solves the problem that the drainage tube 101 rotates when the shell member 5 rotates to rub and dredge the blockage of the drainage tube 101 through the roller member 6. It includes a first shell 501 with a pin groove 504 on one side close to the second shell 502, and the pin groove 504 is provided with a compression spring 505 and a pin 506.

[0046] In this embodiment, four corners of the first shell 501 and the second shell 502 on one side where they fit together are provided with ejector grooves 504, and the extrusion spring 505 pushes the ejector 506 to protrude, so that the first shell 501 and the second shell 502 can be separated when the cone sleeve 302 is away from the connecting cone 503.

[0047] Although it is mentioned in Example 1 that the drainage catheter 101 is pushed by its restoring force, the deformation restoring force of the drainage catheter 101 in Example 1 is small and recovers slowly. In the operation in which the first shell 501 and the second shell 502 need to be repeatedly separated and matched, and then rotated for unblocking, the separation of the first shell 501 and the second shell 502 only by the restoring force of the deformation of the drainage catheter 101 will result in poor unblocking efficiency. Therefore, an extrusion spring 505 and a ejector pin 506 are provided to assist in the separation.

[0048] Movable grooves 202 are provided on both sides of the bottom end of the shell 201, and a movable block 303 is movably installed in the movable groove 202, one end of the movable block 303 is fixedly connected to the bottom end of the vertical plate 301, and the other end of the movable block 303 passes through the movable groove 202 and extends to the bottom of the shell 201 and is fixedly connected to a driving finger plate 304, limiting blocks 305 are provided on the upper ends of both sides of the vertical plate 301, and limiting grooves 203 are provided on both sides of the inner cavity of the shell 201, and the limiting grooves 203 and the limiting blocks 305 are slidably matched.

[0049] In this embodiment, the length of the movable groove 202 is the maximum distance that the cone sleeve 302 and the connecting cone 503 are matched to the cone sleeve 302 and the connecting cone 503 being away from but not separated (the first shell 501 and the second shell 502 are separated, and the inner diameter of the pressure roller 6 is in contact with the outer wall of the drainage catheter 101). During operation, the driving finger plate 304 is clamped by two fingers that can exert the most force, so that the driving finger plates 304 at both ends are close to each other, thereby achieving the matching of the cone sleeve 302 with the connecting cone 503 and the cone sleeve 302 away from the connecting cone 503, thereby achieving the separation and fitting matching of the first shell 501 and the second shell 502.

[0050] Furthermore, by providing the limiting groove 203 and the limiting block 305 , when the finger plate 304 is controlled to be driven, the vertical plate 301 can move in a straight line without tipping over.

[0051] A first tension spring 7 is provided on one side of the vertical plate 301 away from the cone sleeve 302, and the other end of the first tension spring 7 is fixedly connected to the inner wall of the shell 201. Through the setting of the first tension spring 7, when the driving finger plates 304 at both ends drive the vertical plate 301 to drive the cone sleeve 302 to squeeze and match the connected cone 503, there is a restoring force, so that when the first shell 501 and the second shell 502 need to be separated, they can be directly released to reset.

[0052] A first clamping ring 8 and a second clamping ring 9 matching the drainage catheter 101 are rotatably mounted on both ends of the housing 201 through a rotating shaft, and a convex rubber sheet 10 is provided on the first clamping ring 8 and the second clamping ring 9.

[0053] A slide bar 11 is provided on one side of the first clamping ring 8 and the second clamping ring 9 that are attached to the shell 201, and a slide groove 205 matching the slide bar 11 is opened on the shell 201, a second tension spring 12 is provided in the slide groove 205, and two ends of the second tension spring 12 are respectively connected to the inner wall of the slide groove 205 and the side wall of the slide bar 11.

[0054] In the present embodiment, the rotating openings of the first clamping ring 8 and the second clamping ring 9 are downward. In the initial state, under the action of the second tension spring 12, the first clamping ring 8 and the second clamping ring 9 are expanded outward, so that the raised rubber sheet 10 inside them is located outside the catheter through hole 204, and therefore will not contact the outer wall of the drainage catheter 101. When the first clamping ring 8 and the second clamping ring 9 rotate in a circular shape, the inner diameter of the circle formed by the raised rubber sheet 10 inside them is smaller than the outer wall of the drainage catheter 101, thereby clamping the drainage catheter 101 and avoiding the deflection of the drainage catheter 101 when the dredging component 4 is rotated.

[0055] One end of the outer wall of the first clamping ring 8 and the second clamping ring 9 away from the rotating shaft is connected with a pull rope 13, and the other end of the pull rope 13 is fixedly connected to the driving finger plate 304. Through the setting of the pull rope 13, the driving finger plate 304 drives the vertical plate 301 to approach, so that the first shell 501 and the second shell 502 are fitted together. When the drainage catheter 101 is squeezed by the pressure roller 6, the first clamping ring 8 and the second clamping ring 9 can be driven to rotate, and the drainage catheter 101 is clamped by the convex rubber sheet 10, so as to facilitate the rotation of the dredging component 4 to dredge the blockage.

[0056] The rest of the structure is the same as that of Example 1.

[0057] Example 3, reference Figures 1 to 7 , which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides a lead wire 15 and a magnetic ball 16, which improves the dredging effect of the drainage catheter 101, and includes the drainage tube that is easy to dredge in the above embodiment, which includes a drainage catheter 101 with cross bars 14 at both ends, and a lead wire 15 is arranged between the cross bars 14, and a plurality of magnetic balls 16 are arranged in a linear array on the lead wire 15, and the pressure roller member 6 is composed of a non-magnetic roller 601 and a magnetic roller 602, and only one magnetic roller 602 is provided, and the magnetic roller 602 and the magnetic ball 16 are magnetically matched.

[0058] In this embodiment, the cross bar 14 is made of silicone, and the two ends of the lead 15 are fixedly connected to the middle end of the cross bar 14. When the dredging component 4 rotates to rub the drainage catheter 101, the magnetic roller 602 will attract the magnetic ball 16 on the lead 15, so that the lead 15 at the blocked part is pulled and bent, and as the dredging component 4 rotates, the lead 15 is stirred in the drainage catheter 101, thereby improving the dredging effect of the drainage tube.

[0059] The rest of the structure is the same as that of Example 2.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A drainage tube that is easy to dredge, characterized in that: include, A catheter mechanism (1), comprising a drainage catheter (101), an in-body catheter (102) arranged at one end of the drainage catheter (101), and a connector tube (103) arranged at an end of the drainage catheter (101) away from the in-body catheter (102); A dredging mechanism (2), comprising a housing (201) movably mounted on the drainage catheter (101), a support assembly (3) disposed in the housing (201), and a dredging assembly (4) rotatably mounted on the support assembly (3); The dredging component (4) comprises a casing member (5) arranged outside the drainage catheter (101), and a roller member (6) rotatably mounted in an annular array in the inner cavity of the casing member (5); The inner diameter of the pressure roller member (6) is smaller than the outer diameter of the drainage catheter (101).

2. The drainage tube for dredging as claimed in claim 1, characterized in that: The casing member (5) is composed of a first casing (501) and a second casing (502), and the first casing (501) and the second casing (502) are matched to form a circular tube and are sleeved on the outside of the drainage catheter (101).

3. The drainage tube for dredging as claimed in claim 2, characterized in that: The support assembly (3) comprises vertical plates (301) symmetrically arranged in the housing (201), and two vertical plates (301) are rotatably mounted with frustum sleeves (302) on opposite sides thereof; Both ends of the first shell (501) and the second shell (502) are matched with connecting cones (503), and the connecting cones (503) and the cone sleeves (302) are butt-jointed and matched.

4. The drainage tube for dredging as claimed in claim 3, characterized in that: A pin groove (504) is provided on one side of the first shell (501) close to the second shell (502), and a compression spring (505) and a pin (506) are arranged inside the pin groove (504).

5. The drainage tube for dredging as claimed in claim 4, characterized in that: Both sides of the bottom end of the shell (201) are provided with movable grooves (202), and a movable block (303) is movably installed in the movable groove (202), one end of the movable block (303) is fixedly connected to the bottom end of the vertical plate (301), and the other end of the movable block (303) passes through the movable groove (202) and extends to the bottom of the shell (201) and is fixedly connected to a driving finger plate (304); Limiting blocks (305) are provided at the upper ends of both sides of the vertical plate (301), limiting grooves (203) are provided on both sides of the inner cavity of the shell (201), and the limiting grooves (203) and the limiting blocks (305) are slidably matched.

6. The drainage tube for dredging as claimed in claim 4 or 5, characterized in that: A first tension spring (7) is provided on one side of the vertical plate (301) away from the frustum sleeve (302), and the other end of the first tension spring (7) is fixedly connected to the inner wall of the housing (201).

7. The drainage tube for dredging as claimed in claim 6, characterized in that: Both ends of the shell (201) are provided with catheter through holes (204), and both ends of the shell (201) are rotatably mounted with a first clamping ring (8) and a second clamping ring (9) matching the drainage catheter (101) via a rotating shaft, and both the first clamping ring (8) and the second clamping ring (9) are provided with a convex rubber sheet (10).

8. The drainage tube for dredging as claimed in claim 7, characterized in that: A sliding rod (11) is provided on one side of the first clamping ring (8) and the second clamping ring (9) that are in contact with the housing (201), and a sliding groove (205) matching the sliding rod (11) is provided on the housing (201); A second tension spring (12) is arranged in the slide groove (205), and two ends of the second tension spring (12) are respectively connected to the inner wall of the slide groove (205) and the side wall of the slide rod (11).

9. The drainage tube for dredging as claimed in claim 8, characterized in that: One end of the outer wall of the first clamping ring (8) and the second clamping ring (9) away from the rotating shaft is connected to a pull rope (13), and the other end of the pull rope (13) is fixedly connected to the driving finger plate (304).

10. The drainage tube for dredging as claimed in claim 8 or 9, characterized in that: Both ends of the drainage catheter (101) are provided with cross bars (14), and a lead wire (15) is provided between the cross bars (14), and a plurality of magnetic balls (16) are provided in a linear array on the lead wire (15); The pressure roller member (6) is composed of a non-magnetic roller (601) and a magnetic roller (602), and only one magnetic roller (602) is provided, and the magnetic roller (602) and the magnetic ball (16) are magnetically matched.

Images