tube cutter

Abstract

The pipe-cutting wrench includes upper and lower jaws. The upper jaw has a pre-compression block and at least one compression ring. A pipe-cutting knife is located below the upper jaw between the pre-compression block and the compression ring. A spring is located on the side of the compression ring, with one end resting on the compression ring body and the other end resting on the upper jaw. Corresponding to the compression ring, the lower jaw has a pipe-pressing platform for laying the hose. The upper jaw also has a nail cavity for placing nail teeth within the range of the pipe-pressing platform. On the upper surface of the pipe-pressing platform, there is a nail groove for the nail teeth of the upper jaw to bend around the hose body and close the hose. By setting a pre-compression block, compression ring, and pipe-cutting knife in the upper jaw, and cooperating with the pipe-pressing platform in the lower jaw, the residual liquid in the corresponding pipe section is squeezed to both sides of the pipe body during the single closing of the upper and lower jaws, and the hose is cut in the middle. The pipe is closed by the nail teeth on the hose near the cut end. The structure is ingenious, easy to use, and achieves no residual liquid flow after pipe cutting.

Description

Technical Field

[0001] This invention relates to a type of pliers, specifically to pipe cutting pliers. Background Technology

[0002] In clinical practice, there are situations where lymphatic fluid accumulates and needs to be drained. Due to the different locations of the lymph nodes, multiple catheters are often required for drainage. Some of these catheters have branches. After the branch tubes are removed, the main tube is not removed with them. Because the branch tubes are connected to the main tube, the branch tubes can only be clamped and rolled up, which is very inconvenient to use. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problem of inconvenient placement of branch pipes when the main pipe is not removed, and to provide a pipe-cutting wrench that can directly cut the branch pipe and seal the cut end after cutting.

[0004] The technical solution to the problem that this invention aims to solve is as follows:

[0005] A pipe cutting wrench, comprising upper and lower jaws, characterized in that: the upper jaw is provided with a pre-compression block that can retract to the inner side of the upper jaw, at least one compression ring hinged to the jaw body of the upper jaw, and a pipe cutting knife located below the upper jaw between the pre-compression block and the compression ring; a spring is provided on the side of the compression ring, one end of which rests on the compression ring body and the other end rests on the upper jaw, and the compression ring can achieve lateral rotation around the hinge point of the upper jaw through the spring when the upper and lower jaws are closed;

[0006] Corresponding to the compression ring, a pumping platform for laying the hose is provided on the lower jaw, and a nail cavity for placing the nail teeth is provided within the range of the pumping platform of the upper jaw; on the upper surface of the pumping platform, a nail groove is provided for matching the upper jaw when it clamps close to the lower jaw, so that the nail teeth of the upper jaw bend around the hose body to close the hose pipe.

[0007] There are two extrusion rings, symmetrically arranged on both sides of the pre-compression block. The surface of the extrusion ring that contacts the rolling platform is an arc-shaped surface. The ends of the pre-compression block are provided with concave arc-shaped slopes that match the arc-shaped surfaces of the extrusion rings.

[0008] A spring chamber is provided inside the upper jaw. The pre-compression block extends into the spring chamber and is locked inside the spring chamber by the extended edge extending from the periphery. A spring with one end abutting on the extended edge and the other end abutting on the wall of the spring chamber provides elastic resistance to the retraction of the pre-compression block when the upper and lower jaws are closed.

[0009] The extrusion platform is provided with an arc-shaped concave groove, and the extrusion ring body is provided with a convex arc bend that matches the arc-shaped concave groove.

[0010] The masturbation platform is equipped with a positioning spring between the upper and lower jaws to facilitate the matching position of the squeezing ring when the upper and lower jaws are closed.

[0011] A through hole is provided on the upper surface of the upper jaw, which communicates with the nail cavity. A nail holder with nail teeth is fixed to the upper jaw through the through hole, and the nail teeth are exposed from the lower opening of the nail cavity.

[0012] The beneficial effects of this invention are as follows:

[0013] By setting a pre-compression block, a squeezing ring, and a pipe-cutting knife in the upper jaw, and cooperating with the lower jaw to set up a pipe-rolling platform, the residual liquid in the corresponding pipe section is squeezed to both sides of the pipe body during the one-time closing of the upper and lower jaws, and the pipe is cut in the middle. The pipe is then closed by the nail teeth on the side of the pipe near the cut end. The structure is ingenious, easy to use, and ensures that no residual liquid flows out after the pipe is cut. Attached image description:

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is an exploded view of the structure of the present invention;

[0017] Figure 3 This is a diagram showing the state of the lower jaws in contact during the implementation of this invention;

[0018] Figure 4 yes Figure 3 State diagram during further closure;

[0019] Figure 5 This is a cross-sectional schematic diagram of the upper and lower jaws described in this invention.

[0020] Reference numerals: 1. Upper jaw; 11. Pre-compression block; 111. Extension edge; 12. Compression ring; 121. Convex arc bend; 13. Spring; 14. Nail cavity; 15. Spring chamber; 16. Spring; 17. Pipe cutter; 18. Arc-shaped surface; 181. Outer edge; 19. Concave arc-shaped slope; 2. Lower jaw; 20. Nail tooth; 21. Pipe-rolling platform; 22. Nail groove; 23. Arc-shaped concave groove; 24. Alignment spring; 25. Nail holder; 26. Through hole; 3. Upper handle; 4. Lower handle; A. Flexible hose. Detailed implementation method:

[0021] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, that is, to provide numerous specific details in order to offer a more thorough understanding of the present invention. However, those skilled in the art will recognize that the present invention can be practiced without one or more of these details. In these examples, to avoid confusion with the present invention, some technical features well-known in the art have not been described.

[0022] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. Therefore, these are merely examples and should not be used to limit the scope of protection of the present invention.

[0023] Additionally, it should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0024] See Figures 1 to 5 The pipe cutting wrench includes upper and lower jaws 1 and 2, and lower and upper handles 3 and 4 corresponding to the upper and lower jaws 1 and 2. The tail end of the upper jaw 1 extends to form the lower handle 3, and the tail end of the lower jaw 2 extends to form the upper handle 4. The lower and upper handles 3 overlap to form a hinge point. When the lower and upper handles 3 and 4 are pressed by hand, the upper and lower jaws 1 and 2 can be controlled to move closer together.

[0025] The upper jaw 1 is provided with a pre-compression block 11 that can retract to the inner side of the upper jaw 1, at least one compression ring 12 hinged to the jaw body of the upper jaw 1, and a pipe cutter 17 located below the upper jaw 1 between the pre-compression block 11 and the compression ring 12; a spring 13 is provided on the side of the compression ring 12, with one end abutting on the ring body of the compression ring 12 and the other end abutting on the upper jaw 1, and the compression ring 12 can achieve lateral rotation around the hinge point of the upper jaw 1 through the spring 13 when the upper and lower jaws 1 and 2 are closed;

[0026] Corresponding to the compression ring 12, a hose-laying platform 21 for laying the hose is provided on the lower jaw 2. The upper jaw 1 is also provided with a nail cavity 14 for placing the nail teeth 20 within the range of the hose-laying platform 21. The nail cavity 14 is located on one side of the pre-compression block 11 and the compression ring 12 is provided on this side. On the upper surface of the hose-laying platform 21, a nail groove 22 is provided for matching the upper jaw 1 when it clamps close to the lower jaw 2, so that the nail teeth 20 set on the upper jaw 1 bend around the hose body to close the hose pipe.

[0027] The implementation principle of this invention is as follows:

[0028] Pick up the section of the hose branch or main pipe that needs to be cut, and place that section of hose above the masturbation platform 21. At this time, it is best to gently press the hose portions exposed on both sides of the masturbation platform 21 against the side walls of the lower jaw 2.

[0029] At this point, the hands holding the upper and lower jaws 3 and 4 begin to apply force to close the jaws, and the pre-compression block 11 on the upper jaw 1 first contacts the masturbation platform 21. As the angle of the upper and lower jaws 1 and 2 changes, the pre-compression block 11 compacts the hose body and flattens it, causing the liquid inside the hose to be pushed to both sides by the pre-compression block 11. At this time, the lowermost ring wall of the compression ring 12 located on the side of the pre-compression block 11 also abuts against the hose body. As the upper jaw 1 further closes with the lower jaw 2, the pre-compression block 11 retracts to the inside of the upper jaw 1. During the retraction process, the compression ring 12 begins to be gradually subjected to the force of the lower jaw 2, and this reaction force and the resistance of the spring 13 located on the side of the compression ring 12 form a resultant force. Part of the resultant force causes the ring wall below the compression ring 12 to move outward on the masturbation platform 21, squeezing the hose and forcing the liquid inside the hose to be squeezed to the outside of the masturbation platform 21.

[0030] Then, as the upper jaw 1 and lower jaw 2 are about to close, the pre-compression block 11 will retract completely into the upper jaw 1. Between the compression ring 12 and the pre-compression block 11, a section of flexible tubing, squeezed by the compression ring 12 and free of liquid, begins to contact the pipe-cutting knife 17 positioned below the upper jaw 1 between the pre-compression block 11 and the compression ring 12. As the jaws close further, the pipe-cutting knife 17 cuts the tubing. Simultaneously, the nail teeth 20 within the nail cavity 14 have already contacted the nail grooves 22 on the masturbation platform 21. As the upper jaw 1 and lower jaw 2 fully close, the nail teeth 20 are bent by the pressure of the groove wall of the nail groove 22, finally encircling the tubing surface to close the tubing.

[0031] Continue reading Figure 5 Furthermore, as an improvement to the present invention, there are two extrusion rings 12, which are symmetrically arranged on both sides of the pre-compression block 11. The part of the ring surface of the extrusion ring 12 that contacts the masturbation platform 21 is provided with an arc-shaped surface 18. The ends of the pre-compression block 11 are provided with concave arc-shaped slopes 19 that match the arc-shaped surface 18 of the extrusion ring 12.

[0032] In this embodiment, the pre-compression block 11 presses against the hose A. The concave arc-shaped slope 19 matches the arc-shaped surface 18 of the compression ring 12, making the portion of the compression ring 12 and the pre-compression block 11 in contact with the hose A form a whole. In this case, no gap will be generated in the hose A corresponding to the concave arc-shaped slope 19 between the compression ring 12 and the pre-compression block 11, meaning that the liquid in the hose A can be completely squeezed to the outside of the outer edge 181 of the arc-shaped surface 18 of the compression ring 12.

[0033] In addition, when the upper jaw 1 approaches the lower jaw 2 to close, the pre-compression block 11 retracts into the upper jaw 1, and its concave arc-shaped slope 19 can just generate an outward pushing force on the arc-shaped surface 18 of the compression ring 12.

[0034] Furthermore, as an improvement to the present invention, a spring chamber 15 is provided inside the upper jaw 1. The pre-pressing block 11 extends into the spring chamber 15 and is secured in the spring chamber 15 by the extension edge 111 extending from the periphery. The spring 16, with one end abutting against the extension edge 111 and the other end abutting against the wall of the spring chamber 15, provides elastic resistance to the pre-pressing block 11 when the upper and lower jaws 1 and 2 close and retract.

[0035] In this embodiment, the spring 16 can easily and effectively achieve the retraction of the preload block 11 when the upper and lower jaws 1 and 2 are closed, and the ejection when the upper and lower jaws 1 and 2 are opened.

[0036] Furthermore, as an improvement to the present invention, the masturbation platform 21 is provided with an arc-shaped concave groove 23, and the extrusion ring 12 body is provided with a convex arc bend 121 that matches the arc-shaped concave groove 23.

[0037] In this embodiment, the arc-shaped concave groove 23 can easily match the surface of the hose A, so that the upper and lower jaws 1 and 2 can be quickly and effectively positioned when closed, and can also prevent the hose A from shifting when it comes into contact with the predetermined block 11 and the compression ring 12 of the upper jaw 1.

[0038] In addition, setting the compression ring 12 with a matching convex arc bend 121 is beneficial for the compression ring 12 to squeeze the hose A along the pipe body direction, so that the liquid in the hose A is squeezed more fully.

[0039] Furthermore, as an improvement to the present invention, a positioning spring 24 is provided between the masturbation platform 21 and the lower jaw 2 to facilitate the matching position of the squeezing ring when the upper and lower jaws are closed.

[0040] In this embodiment, the alignment spring 24 is partially exposed on the surface of the lower jaw 2, creating a certain height difference between the masturbation platform 21 and the lower jaw 2 after the alignment spring 24 is connected and fixed. This height difference compensates for the problem that the pre-compression block 11 and the compression ring are not properly aligned with the surface of the flexible hose A on the masturbation platform 21 when the upper jaw 1 approaches and closes the lower jaw 2. This avoids the situation where the pre-compression block 11 and the compression ring 12 on the upper jaw 1 come into contact with the surface of the flexible hose A, causing the hose A to slip and shift on the surface of the masturbation platform 21 when the surface of the masturbation platform 21 is flat and the surface of the flexible hose A is smooth and has no fixing means.

[0041] Furthermore, as an improvement to the present invention, a through hole 26 is provided on the upper surface of the upper jaw 1 to communicate with the nail cavity 14, and a nail holder 25 with nail teeth 20 is fixed to the upper jaw 1 through the through hole 26, so that the nail teeth 20 are exposed from the lower cavity opening of the nail cavity 14.

[0042] In implementation, to fix the nail holder 25 to the upper jaw 1, the following solution can be used:

[0043] 1. The pin holder 25 is fastened to the upper jaw 1 by a buckle on the outside of the pin holder 25.

[0044] 2. Alternatively, a pin can be inserted from the side into the upper jaw 1 after the pin holder 25 passes through the through hole 26.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A pipe-cutting wrench, comprising upper and lower jaws, characterized in that: The upper jaw is provided with a pre-compression block that can retract to the inner side of the upper jaw, at least one extrusion ring hinged to the upper jaw body, and a pipe cutter located below the upper jaw between the pre-compression block and the extrusion ring. A spring is provided on the side of the compression ring, with one end resting on the compression ring body and the other end resting on the upper jaw. When the upper and lower jaws are closed, the compression ring can rotate laterally around the hinge point of the upper jaw through the spring. Corresponding to the compression ring, a rolling platform for laying the hose is provided on the lower jaw. The upper jaw is also provided with a nail cavity for placing the nail teeth within the range of the rolling platform. On the upper surface of the rolling platform, there is a nail groove for matching the upper jaw when it clamps close to the lower jaw, so that the nail teeth of the upper jaw bend around the hose body to close the hose pipe. There are two extrusion rings, symmetrically arranged on both sides of the pre-compression block. The surface of the extrusion ring that contacts the rolling platform is an arc-shaped surface. The ends of the pre-compression block are provided with concave arc-shaped slopes that match the arc-shaped surface of the extrusion ring. A spring chamber is provided inside the upper jaw. The pre-compression block extends into the spring chamber and is locked inside the spring chamber by the edge extending from the periphery. A spring with one end abutting the extended edge and the other end abutting the wall of the spring chamber provides elastic resistance to the retraction of the pre-compression block when the upper and lower jaws are closed. An alignment spring is provided between the masturbation platform and the lower jaw to facilitate the matching position of the compression ring when the upper and lower jaws are closed.

2. The pipe-cutting wrench according to claim 1, characterized in that: The extrusion platform is provided with an arc-shaped concave groove, and the extrusion ring body is provided with a convex arc bend that matches the arc-shaped concave groove.

3. The pipe-cutting wrench according to claim 1, characterized in that: A through hole is provided on the upper surface of the upper jaw, which communicates with the nail cavity. A nail holder with nail teeth is fixed to the upper jaw through the through hole, and the nail teeth are exposed from the lower opening of the nail cavity.

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