Precise cutting tool for packing

Abstract

The utility model discloses a packing accurate cutting tool, including cutter and a plurality of annular positioning strips of different lengths, cutter includes support rod and cutting rod, support rod and cutting rod one end are mutually rotatingly connected through hinge joint seat, support rod outer wall facing cutting rod is fixedly connected with cutting plate, and the cutting plate is fixed on the support rod outer wall facing cutting rod. The top face of the cutting plate is fixedly connected with a positioning plate, and a blade is detachably installed on the outer wall, facing the cutting plate, of the cutting rod. When the packing cutting device is used, after the two ends of the annular positioning strip with the needed size are fixed to the cutting plate, the packing surrounds the annular positioning strip by a circle and intersects on the upper surface of the cutting plate, meanwhile, the outer wall of one side of the packing is attached to the outer wall of the positioning plate, then the cutting rod is rotated relative to the supporting rod, the blade is made to cut the packing towards the cutting plate, and the packing is cut off. And the packing can be cut off at the intersection of the packing, so that a packing section with proper size, standard notch gradient and neat notches is obtained, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of packing cutting, in particular to a precise cutting tool for packing Background Technique

[0002] Packing is a sealing filler woven from relatively soft linear materials. Its cross-section is usually square, rectangular or circular, etc. Its main function is to fill the sealing cavity of equipment such as pumps and valves to achieve the sealing of the cavity. During long-term use, the sealing filler may be worn, resulting in poor sealing and leakage of the transported liquid. Therefore, it is necessary to replace the sealing filler regularly.

[0003] When replacing various types of packing, it is usually necessary to accurately measure the length of the packing ring to be cut, and keep the slope of the cut at a specific angle (such as Figure 4 shown), and the cut should be neat, ensuring that the cut surfaces formed by cutting are pieced together to form a complete O-ring and are completely installed in the sealing cavity. The cutting quality of the packing directly affects the sealing effect of the filler. Currently, there are mainly the following several ways to cut the packing:

[0004] One is to use tools such as a craft knife or scissors for manual cutting. Due to the characteristics of manual cutting operations, it is difficult to keep the angles of the cut surfaces of the packing cut twice consistent, the fitting degree is low, and low-strength points are easily generated on the splicing surface after the cut surfaces are pieced together, resulting in the phenomenon of poor sealing of the packing.

[0005] The second is to use special tools for cutting. To solve the above problems, industry experts have proposed various solutions. For example, a certain patent (application number 2016211024409) proposed a limiting device that can accurately shear the filler at a 45° cut, overcoming the influence of the cut end face angle on the sealing performance, but it does not clarify how to control the length of the filler. Other solutions (patent application numbers 2020203666301, 2018218363605, etc.) also pay more attention to the angle and flatness of the cut, and do not fundamentally solve key problems such as whether the filler length accurately matches the sealing shaft parts.

[0006] Therefore, it is necessary to study a precise cutting tool for packing to easily solve the influence on the sealing effect caused by factors such as length measurement error, angle error, and cut neatness. Content of the Utility Model

[0007] The purpose of the utility model is to provide a precise cutting tool for packing to solve the problems raised in the above background technique.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] A precise cutting tool for packing gland, comprising a cutter and a plurality of annular positioning strips with different lengths. The cutter includes a support rod and a cutting rod. One end of the support rod and the cutting rod are rotatably connected to each other through a hinge seat. A cutting plate is fixedly connected to the outer wall of the support rod facing the cutting rod. A positioning plate is fixedly connected to the top surface of the cutting plate. A blade is detachably installed on the outer wall of the cutting rod facing the cutting plate. The two ends of the annular positioning strip are detachably connected to the top surface of the cutting plate, and the two ends of the annular positioning strip are located on both sides of the blade.

[0010] As a further scheme of the present utility model: Two flat head screws are detachably connected to the top of the cutting plate through threaded holes, and tapered holes adapted to the flat head screws are respectively penetrated through both ends of the outer wall of the blade.

[0011] As a further scheme of the present utility model: The connection line of the two flat head screws is perpendicular to the length direction of the support rod, and the length direction of the positioning plate is parallel to the connection line of the two flat head screws.

[0012] As a further scheme of the present utility model: A knife holder is fixedly installed on the outer wall of the cutting rod, and the blade is detachably installed on the knife holder through a plurality of screws.

[0013] As a further scheme of the present utility model: An inclined cutting edge is provided at the bottom end of the blade, a relief groove adapted to the blade is opened at the top of the cutting plate, and the two flat head screws are respectively located on both sides of the relief groove.

[0014] As a further scheme of the present utility model: The included angle between the length direction of the relief groove and the length direction of the support rod is 25-50°.

[0015] As a further scheme of the present utility model: Grips are fixedly connected to one ends of the support rod and the cutting rod away from the hinge seat.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] When the present utility model is in use, after fixing the two ends of the annular positioning strip with the required size to the cutting plate, the packing gland is wound around the annular positioning strip for one week and crosses at the upper surface of the cutting plate. At the same time, one outer wall of the packing gland is attached to the outer wall of the positioning plate. Then, the cutting rod is rotated relative to the support rod to cut the blade towards the cutting plate, and the packing gland can be cut off at the crossing position of the packing gland, so as to obtain a packing section with appropriate size, standard incision slope and neat incision. The operation is simple and convenient. Description of the drawings

[0018] Figure 1 It is a schematic structural diagram of a precise cutting tool for packing gland.

[0019] Figure 2 It is a top view structural schematic diagram of a cutting plate in a precise cutting tool for packing

[0020] Figure 3 It is a structural schematic diagram of an annular positioning strip in a precise cutting tool for packing

[0021] Figure 4 It is a schematic diagram of the cut of the packing

[0022] Among them, there are support rod 1, hinge seat 2, cutting rod 3, cutting plate 4, positioning plate 5, relief groove 6, flat head screw 7, tool holder 8, blade 9, annular positioning strip 10, taper hole 11, and grip 12. Specific embodiments

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation in the specification, and therefore cannot be understood as a limitation to the present utility model.

[0026] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0027] Please refer to Figures 1 to 3, in the embodiment of the present utility model, a precise cutting tool for packing includes a cutter and a plurality of annular positioning strips 10 with different lengths. The cutter includes a support rod 1 and a cutting rod 3. One end of the support rod 1 and the cutting rod 3 are rotatably connected to each other through a hinge seat 2. An outer wall of the support rod 1 facing the cutting rod 3 is fixedly connected with a cutting plate 4. A positioning plate 5 is fixedly connected to a top surface of the cutting plate 4. A blade 9 is detachably installed on an outer wall of the cutting rod 3 facing the cutting plate 4. Two ends of the annular positioning strip 10 are detachably connected to the top surface of the cutting plate 4, and two ends of the annular positioning strip 10 are located on both sides of the blade 9. The annular positioning strip 10 is made of a rigid material and has a certain width. After two ends of the annular positioning strip 10 are fixed on the cutting plate 4, an outer diameter of a circle formed by the combination of the annular positioning strip 10 and the cutting plate 4 is equal to a length dimension of a required packing. Since types and models of equipment sealed by using packing are relatively fixed, only one set of common annular positioning strips 10 with different sizes needs to be customized to meet the use requirements.

[0028] By adopting the above scheme, when in use, after fixing two ends of the annular positioning strip 10 with a required size to the cutting plate 4, winding the packing around the annular positioning strip 10 for one week and crossing at an upper surface of the cutting plate 4, and at the same time, an outer wall of one side of the packing is attached to an outer wall of the positioning plate 5, then rotating the cutting rod 3 relative to the support rod 1 to cut the blade 9 towards the cutting plate 4, the packing can be cut off at the crossing of the packing, so as to obtain a packing section with a proper size, a standard incision slope and a neat incision. The operation is simple and convenient.

[0029] Specifically combined with Figure 2 and Figure 3 , in an embodiment of the present utility model, two flat head screws 7 are detachably connected to a top of the cutting plate 4 through threaded holes, and tapered holes 11 adapted to the flat head screws 7 are respectively penetrated through outer walls of two ends of the blade 9.

[0030] Through the cooperation of the two flat head screws 7 and the tapered holes 11, it is convenient to fix two ends of the annular positioning strips 10 with different lengths on the cutting plate 4, and an end of the flat head screw 7 can be received in the tapered hole 11, so as to avoid damaging the packing.

[0031] Specifically combined with Figure 1 and Figure 2 , in an embodiment of the present utility model, a connection line of the two flat head screws 7 is perpendicular to a length direction of the support rod 1, and a length direction of the positioning plate 5 is parallel to the connection line of the two flat head screws 7.

[0032] Specifically combined with Figure 1, in an embodiment of the present utility model, a tool holder 8 is fixedly installed on the outer wall of the cutting rod 3, and the blade 9 is detachably installed on the tool holder 8 through a plurality of screws, so as to facilitate the installation of the blade 9 on the tool holder 8, and when the blade 9 is blunt, it is convenient to remove and polish.

[0033] Specifically combined with Figure 1 , in an embodiment of the present utility model, an inclined cutting edge is provided at the bottom end of the blade 9, a relief groove 6 adapted to the blade 9 is opened at the top of the cutting plate 4, and the two flat head screws 7 are respectively located on both sides of the relief groove 6.

[0034] During the process of cutting the packing by the inclined cutting edge of the blade 9, the cutting edge can gradually contact the packing, and the part of the packing away from the positioning plate 5 will contact the cutting edge first, so that the cutting edge squeezes the packing towards the positioning plate 5 during the cutting process, thereby improving the cutting effect and ensuring the neatness of the cut with the cooperation of the positioning plate 5.

[0035] The included angle between the length direction of the relief groove 6 and the length direction of the support rod 1 is 25 - 50°, and preferably 30° or 45°.

[0036] Specifically combined with Figure 1 , in an embodiment of the present utility model, grips 12 are fixedly connected to the ends of the support rod 1 and the cutting rod 3 away from the hinge seat 2 to facilitate the gripping and operation of the ends of the support rod 1 and the cutting rod 3.

[0037] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precise cutting tool for packing, characterized in that: It includes a cutter and several annular positioning strips (10) with different lengths. The cutter includes a support rod (1) and a cutting rod (3). One ends of the support rod (1) and the cutting rod (3) are rotatably connected to each other through a hinge seat (2). A cutting plate (4) is fixedly connected to the outer wall of the support rod (1) facing the cutting rod (3). A positioning plate (5) is fixedly connected to the top surface of the cutting plate (4). A blade (9) is detachably installed on the outer wall of the cutting rod (3) facing the cutting plate (4). The two ends of the annular positioning strip (10) are detachably connected to the top surface of the cutting plate (4), and the two ends of the annular positioning strip (10) are located on both sides of the blade (9).

2. The precision cutting tool for packing as claimed in claim 1, wherein: Two flat head screws (7) are detachably connected to the top of the cutting plate (4) through threaded holes. Taper holes (11) adapted to the flat head screws (7) are respectively provided through the outer wall of the blade (9) near both ends.

3. The precision cutting tool for packing as claimed in claim 2, wherein: The connection line of the two flat head screws (7) is perpendicular to the length direction of the support rod (1), and the length direction of the positioning plate (5) is parallel to the connection line of the two flat head screws (7).

4. The precision cutting tool for packing as claimed in claim 1, wherein: A knife holder (8) is fixedly installed on the outer wall of the cutting rod (3), and the blade (9) is detachably installed on the knife holder (8) through a plurality of screws.

5. The precision cutting tool for packing as claimed in claim 2, wherein: An inclined cutting edge is provided at the bottom end of the blade (9), and a relief groove (6) adapted to the blade (9) is provided at the top of the cutting plate (4). The two flat head screws (7) are respectively located on both sides of the relief groove (6).

6. The precision cutting tool for packing as claimed in claim 5, wherein: The included angle between the length direction of the relief groove (6) and the length direction of the support rod (1) is 25-50°.

7. The precision cutting tool for packing as claimed in claim 4, wherein: Grip handles (12) are fixedly connected to one ends of the support rod (1) and the cutting rod (3) far from the hinge seat (2).

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