Internal pipe cutter

Abstract

The utility model discloses an internal pipe cutter, comprising a sleeve body; a push rod that moves left and right is arranged in the left sleeve opening of the sleeve body, a limiter is fixedly arranged in the middle of the push rod, a spring is sleeved on the part located on the right side of the limiter, and the right end face of the push rod is an inclined surface; an internal cutting tube is arranged in the right sleeve opening of the sleeve body, a radial thrust bearing is arranged on the front end of the internal cutting tube, a receiving chamber for receiving the push rod limiter and its right half is arranged on the inner side, a knife holder fixed by a locating pin is arranged in the receiving chamber near the right end thereof, and a cutting knife is fixed on the knife holder. Beneficial effects of the utility model: 1. Simple structure, easy operation, cutting operation can be realized by only pushing the push rod; 2. High cutting precision, the accuracy and stability of cutting can be ensured by setting the radial thrust bearing and the knife holder; 3. Suitable for cutting copper tubes of various heat exchangers, with better application effect.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical components, in particular to an internal pipe cutter. Background Art

[0002] Heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It completes heat exchange through heat transfer, transferring heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. Heat exchangers play an important role and are widely used in chemical, petroleum, power, food and many other industrial production.

[0003] At present, the only way to replace the copper tube of the heat exchanger is to cut the copper tube from the inside and then pull it out for replacement. The existing tube cutting tools are often complicated in structure, inconvenient to operate, and have low cutting accuracy, which cannot meet the needs of users. Therefore, it is of great practical significance to develop an internal tube cutter with simple structure, convenient operation and high cutting accuracy. Utility Model Content

[0004] In order to solve the above existing problems, the utility model provides an internal pipe cutter. The utility model is implemented through the following technical solutions.

[0005] An internal pipe cutter includes a sleeve body;

[0006] A push rod that moves left and right is arranged in the left sleeve opening of the sleeve body, a stopper is fixedly arranged in the middle of the push rod, a spring is sleeved on the part of the push rod located on the right side of the stopper, and the right end face of the push rod is an inclined surface;

[0007] An inner cutting tube is provided in the right sleeve opening of the sleeve body, a radial thrust bearing is provided on the front port of the inner cutting tube, an accommodating cavity for accommodating the push rod limiter and its right half is provided on the inner side thereof, a knife holder fixed by a locating pin is provided in the accommodating cavity near its right end, and a cutting knife is fixed on the knife holder.

[0008] Furthermore, the push rod and the limiting member are both hexagonal structures.

[0009] Furthermore, the tool holder is in a right-angled trapezoidal structure, and its inclined surface is arranged parallel to the inclined surface of the right end of the push rod.

[0010] Beneficial effects of the utility model:

[0011] 1. Simple structure, easy operation, just push the push rod to achieve cutting operation;

[0012] 2. High cutting precision. The setting of the centripetal thrust bearing and the tool holder can ensure the accuracy and stability of cutting;

[0013] 3. Suitable for cutting copper tubes of various heat exchangers, with better application effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural diagram of an internal pipe cutter. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0017] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0019] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] Embodiment: An internal pipe cutter comprises a sleeve body 10;

[0021] A push rod 20 that moves left and right is arranged in the left sleeve opening of the sleeve body 10. A stopper 21 is fixedly arranged in the middle of the push rod 20. A spring 22 is sleeved on the part of the push rod 20 located on the right side of the stopper 21, and the right end surface of the push rod 20 is an inclined surface.

[0022] An inner cutting tube 30 is provided in the right sleeve opening of the sleeve body 10, and a radial thrust bearing 31 is provided on the front end of the inner cutting tube 30, and a receiving cavity 32 for accommodating the push rod limiter 21 and its right half is provided on the inner side thereof, and a knife holder 33 fixed by a locating pin is provided in the accommodating cavity 32 near its right end, and a cutting knife 34 is fixed on the knife holder 33.

[0023] In the embodiment, the push rod 20 and the limit member 21 are both hexagonal structures for easy operation and fixation, and the tool holder 33 is a right-angled trapezoidal structure, whose inclined surface is arranged parallel to the inclined surface of the right end of the push rod 20, so that the push rod 20 can push the tool holder 33 for cutting.

[0024] When in use, the internal pipe cutter is inserted into the pipe to be cut, and then the push rod is pushed forward. The right end face of the push rod contacts the inclined surface of the knife holder and pushes the knife holder to move the cutter out and cut the pipe.

[0025] The internal tube cutter of the present invention has a simple structure, is easy to operate, and has high cutting accuracy. It is used for cutting copper tubes of various heat exchangers, has simple operation and high use efficiency, and has better application effect.

[0026] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An internal pipe cutter, characterized in that: including a sleeve body; A push rod that moves left and right is arranged in the left sleeve opening of the sleeve body, a stopper is fixedly arranged in the middle of the push rod, a spring is sleeved on the part of the push rod located on the right side of the stopper, and the right end face of the push rod is an inclined surface; An inner cutting tube is provided in the right sleeve opening of the sleeve body, a radial thrust bearing is provided on the front port of the inner cutting tube, an accommodating cavity for accommodating the push rod limiter and its right half is provided on the inner side thereof, a knife holder fixed by a locating pin is provided in the accommodating cavity near its right end, and a cutting knife is fixed on the knife holder.

2. An internal pipe cutter according to claim 1, characterized in that: The push rod and the limiting member are both in a hexagonal structure.

3. The internal pipe cutter according to claim 1, characterized in that: The tool holder is in a right-angle trapezoidal structure, and its inclined surface is arranged parallel to the inclined surface at the right end of the push rod.

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