A manual pipe bender

Abstract

This invention relates to a manual pipe bender, comprising a left bending sleeve and a right bending sleeve. The left bending sleeve has a first pin block fixed at both the front and rear of its right end, and the right bending sleeve has a second pin block fixed at both the front and rear of its left end. The first and second pin blocks at one end are hinged together. The left and right bending sleeves can rotate around the hinge point. A mounting block is fixed to the arc-shaped rear end of each sleeve. A movable channel is formed in the upper part of the mounting block, through which a movable rod movably passes. An arc-shaped movable block is fixedly connected to the front end of the movable rod. An installation cavity is formed in the lower part of the mounting block, within which an adjusting screw is rotatably mounted. The adjusting screw meshes with the movable rod. Bending handles are fixed to the arc-shaped rear ends of both the left and right bending sleeves. This invention can adapt to different pipe diameters, requires less effort during bending, and necessitates less space.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a manual pipe bender. Background Technology

[0002] Conventionally procured pre-buried pipes are mostly straight, requiring secondary processing or the addition of pipe sections to meet the needs of actual construction processes. Currently, commonly used manual pipe benders include... Figure 1 As shown, the manual pipe bender includes a pipe bending disc 01, a pipe holder 02, a working block 03, a positioning handle 04, and an operating handle 05. The pipe bending disc 01 is fixedly connected to the positioning handle 04 via the pipe holder 02 with a U-shaped groove to form a whole. The U-shaped groove can cooperate with the pipe bending groove 06 located on the periphery of the pipe bending disc 01 and the working block 03 to lock the pipe to be bent. A working groove is formed on the working block 03 facing the pipe bending disc 01. This working groove can cooperate with the pipe bending groove 06 to form a cavity to accommodate the pipe to be bent. The working block 03 is connected to the pipe bending disc 01 by a strip-shaped connector 07, and the operating handle 05 is installed on the working block 03. When bending pipes, the worker holds the positioning handle 04 with one hand and the operating handle 05 with the other. First, the worker rotates the operating handle 05 to rotate the working block 03 to a position close to the pipe seat 02. Then, the pipe to be bent is inserted into the U-shaped groove from behind the working block 03. Next, the worker rotates the operating handle 05 clockwise, causing the working block 03 to rotate clockwise around the bending disc 01, thus bending the pipe into a bend. The existing manual pipe bender has the following problems: 1. The width of the working groove and the bending groove 06 is fixed and cannot be adjusted, limiting the applicable pipe diameter; 2. Bending is achieved by rotating only one lever arm of the operating handle 05, resulting in excessive labor intensity for the worker. Additionally, the operating handle 05 requires a large space, restricting the work area; 3. The manual pipe benders currently used on construction sites are often over one meter long, making them too bulky and inconvenient for on-site handling and transport. Summary of the Invention

[0003] The main objective of this invention is to provide a manual pipe bender that can effectively solve the problems in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A manual pipe bender includes a left bend sleeve and a right bend sleeve, both of which are arc-shaped block structures. A first pin block is fixed to the front and rear of the right end of the left bend sleeve, and a second pin block is fixed to the front and rear of the left end of the right bend sleeve. The first and second pin blocks at one end are hinged together. The left and right bend sleeves can rotate around the hinge point. A mounting block is fixed to the rear arc-shaped end of each sleeve. The upper part of the mounting block... An movable channel is provided, through which a movable rod is movably inserted. An arc-shaped movable block is fixedly connected to the front end of the movable rod, which is used to clamp the pipe together with the front ends of the left and right bend sleeves. An installation cavity is provided at the lower part of the installation block, and an adjusting screw is rotatably installed in the installation cavity. The adjusting screw meshes with the movable rod, and rotating the adjusting screw can drive the movable rod to move back and forth. A bend handle is fixed to the arc-shaped rear end of the left and right bend sleeves respectively.

[0006] Preferably, the first pin block and the second pin block are arranged vertically and can abut against each other. The first pin block and the second pin block are provided with a plurality of pin locking holes corresponding to each other along the radial direction of the left and right curved pipe sleeves. By inserting a fixing pin into one of a pair of pin locking holes, the first pin block and the second pin block can be hinged. The left and right curved pipe sleeves can rotate around the fixing pins.

[0007] Preferably, the movable channel is a through trapezoidal groove structure, the movable rod is a trapezoidal block structure that slides with the movable channel, and the bottom of the movable rod has a thread for engaging with the adjusting screw.

[0008] Preferably, the angle between the left and right bend sleeves and the corresponding bend handles is 45°.

[0009] Preferably, the end of the bent tube handle has a through hole.

[0010] This invention provides a manual pipe bender, which has the following beneficial effects;

[0011] 1. By rotating the adjusting screw, the movable rod can be moved back and forth, which in turn moves the movable block back and forth, thus adapting to different pipe diameters.

[0012] 2. When the first and second pin blocks between the two pipe bending handles are hinged, that is, when the first and second pin blocks at the rear end are hinged, the operator holds the two pipe bending handles and rotates them inward to perform pipe bending operations. The included angle between the two pipe bending handles becomes smaller. This operating method uses the two pipe bending handles as the lever arm, which is more labor-saving than existing technology and requires less space. Pipe bending operations can also be performed in narrow areas such as the edge of some floor slabs, increasing the site applicability of the manual pipe bender.

[0013] 3. The fixing pin can be inserted into different pin holes according to the required pipe curvature. The fixing pin insertion point is the center of the pipe bend. After the pipe bending operation is completed, the fixing pin can be removed, thus disassembling the manual pipe bender into two parts, which is convenient for on-site handling and carrying. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of an existing manual pipe bender.

[0015] Figure 2 This is a schematic diagram of the manual pipe bender of the present invention;

[0016] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the mounting block of the present invention;

[0018] Figure 5 This is a schematic diagram of the structure of the movable rod and movable block of the present invention.

[0019] In the diagram: 1. Left bend sleeve; 2. Right bend sleeve; 3. First pin block; 4. Second pin block; 5. Mounting block; 51. Movable channel; 52. Mounting cavity; 6. Movable rod; 7. Movable block; 8. Adjusting screw; 9. Bending handle; 10. Pin locking hole; 11. Through hole. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Examples, such as Figure 2-5 As shown, a manual pipe bender includes a left bend sleeve 1 and a right bend sleeve 2. The left bend sleeve 1 and right bend sleeve 2 are arc-shaped block structures. A first pin block 3 is fixed to both the front and rear of the right end of the left bend sleeve 1, and a second pin block 4 is fixed to both the front and rear of the left end of the right bend sleeve 2. The first pin block 3 and the second pin block 4 at one of the front or rear ends are hinged. The left bend sleeve 1 and right bend sleeve 2 can rotate around the hinge point. A mounting block 5 is fixed to the arc-shaped rear end of the left bend sleeve 1 and right bend sleeve 2. The upper part of the mounting block 5 has an opening... There is an active channel 51, through which an active rod 6 is movably inserted. An arc-shaped active block 7 is fixedly connected to the front end of the active rod 6, which is used to clamp the pipe together with the front ends of the left bend sleeve 1 and the right bend sleeve 2. An installation cavity 52 is opened at the lower part of the installation block 5, and an adjusting screw 8 is rotatably installed in the installation cavity 52. ​​The adjusting screw 8 meshes with the active rod 6. Rotating the adjusting screw 8 can drive the active rod 6 to move back and forth. A bend handle 9 is fixed on the arc-shaped rear end of the left bend sleeve 1 and the right bend sleeve 2, respectively.

[0025] The working principle of this invention is as follows: When working, the pipe is placed in the left bend sleeve 1 and the right bend sleeve 2. By rotating the adjusting screw 8, the movable rod 6 can be moved back and forth, thereby moving the movable block 7 back and forth, which can adapt to different pipe diameters. When the movable block 7 moves forward to clamp the pipe together with the front end of the left bend sleeve 1 and the right bend sleeve 2, the pipe bending operation can be performed. In this invention, there are two operating methods for pipe bending. One method is when the first pin block 3 and the second pin block 4 between the two pipe bending handles 9 are hinged, that is, when the first pin block 3 and the second pin block 4 at the rear end are hinged, the operator holds the two pipe bending handles 9 and rotates them inward to perform the pipe bending operation. The included angle between the two pipe bending handles 9 becomes smaller. This operating method uses the two pipe bending handles 9 as the lever arm, which is more labor-saving than the prior art and requires less space. Pipe bending can also be performed in narrow areas such as the edge of some floor slabs, increasing the site applicability of the manual pipe bender. The other operating method is when the first pin block 3 and the second pin block 4 at the front end are hinged. The operator holds the two pipe bending handles 9 and rotates them outward while pushing the hinged first pin block 3 and the second pin block 4 backward. With the two pipe bending handles 9 as the lever arm, the force point is increased, which can save more effort. However, this operating method also requires more space. The specific operating method can be selected according to actual needs.

[0026] In one specific embodiment, the first pin block 3 and the second pin block 4 are arranged vertically and can abut against each other. The first pin block 3 and the second pin block 4 have a plurality of pin locking holes 10 corresponding to each other along the radial direction of the left bending sleeve 1 and the right bending sleeve 2. By inserting a fixing pin into one pair of pin locking holes 10, the first pin block 3 and the second pin block 4 can be hinged. The left bending sleeve 1 and the right bending sleeve 2 can rotate around the fixing pin as the center. In this embodiment, the fixing pin can be inserted into different pin locking holes 10 according to the required bending curvature. The fixing pin insertion point is the center of the bend. After the bending operation is completed, the fixing pin can be removed, thus disassembling the manual pipe bender into left and right parts for convenient on-site handling and carrying.

[0027] In one specific embodiment, the movable channel 51 is a through trapezoidal groove structure, the movable rod 6 is a trapezoidal block structure that slides in conjunction with the movable channel 51, and the bottom of the movable rod 6 has a thread for engaging with the adjusting screw 8.

[0028] In one specific embodiment, the included angle between the left bend sleeve 1 and the right bend sleeve 2 and the corresponding bend handle 9 is 45°.

[0029] In one specific embodiment, the end of the bent tube handle 9 is provided with a through hole 11 for easy hanging with a rope.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A manual pipe bender, characterized in that: The device includes a left-bend pipe sleeve and a right-bend pipe sleeve, both of which are arc-shaped block structures. A first pin block is fixed to the front and rear of the right end of the left-bend pipe sleeve, and a second pin block is fixed to the front and rear of the left end of the right-bend pipe sleeve. The first and second pin blocks at one end are hinged together, allowing the left and right-bend pipe sleeves to rotate around the hinge point. A mounting block is fixed to the rear arc-shaped end of each sleeve, and the upper part of the mounting block has a movable opening. The movable channel has a movable rod that moves through it. The front end of the movable rod is fixedly connected to an arc-shaped movable block, which is used to clamp the pipe together with the front ends of the left and right bend sleeves. The lower part of the mounting block has an installation cavity, and an adjusting screw is rotatably installed in the installation cavity. The adjusting screw meshes with the movable rod. Rotating the adjusting screw can drive the movable rod to move back and forth. The arc-shaped rear ends of the left and right bend sleeves are respectively fixed with bend handles. The movable channel is a through trapezoidal groove structure, and the movable rod is a trapezoidal block structure that slides in conjunction with the movable channel. The bottom of the movable rod has a thread for engaging with the adjusting screw. The first pin block and the second pin block are arranged vertically and can abut against each other. The first pin block and the second pin block are provided with a plurality of pin holes corresponding to each other along the radial direction of the left and right bend sleeves. By inserting a fixed pin into one of the pin holes, the first pin block and the second pin block can be hinged. The left and right bend sleeves can rotate around the fixed pin.

2. A manual pipe bender according to claim 1, characterized in that: The included angle between the left and right bend sleeves and the corresponding bend handles is 45°.

3. A manual pipe bender according to claim 1, characterized in that: The end of the bending handle is provided with a through hole.

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