Small-pipe-diameter pipe bending device

Abstract

The invention discloses a small-pipe-diameter pipe bending device which comprises a positioning disc and a jacking wheel capable of rotating around the positioning disc in the circumferential direction, the jacking wheel is arranged on a lever, and the lever is rotationally connected with a middle shaft of the positioning disc. The lever is used for controlling the jacking and pressing wheel to rotate around the positioning disc in the circumferential direction so that a pipe body clamped between the positioning disc and the jacking and pressing wheel can be bent, the pipe body is sleeved with the sliding sleeve in a sliding mode, a heating body used for heating the pipe body is arranged on the sliding sleeve, the sleeve is connected with the lever through a connecting rod, and the sleeve is connected with the lever through the connecting rod. And the two ends of the connecting rod are rotationally connected with the sleeve and the lever respectively. By means of the device capable of synchronously moving along with the jacking and pressing wheel, heating and bending of the pipe body are conducted synchronously, and the bent portion is stable.

Description

Technical Field

[0001] The invention relates to the technical field of pipe bending equipment, and in particular to a small-diameter pipe bending device. Background Art

[0002] In construction, bent pipes are often used to be embedded in concrete or used as connectors. Direct bending of pipes by manpower cannot ensure that the inner and outer wall thicknesses of the bent parts of the pipes meet the requirements, and the use of machinery can easily cause the small-diameter pipe body to be deformed or even cut off due to a large impact force. These bending devices usually include a positioning plate and a top pressing wheel that can rotate around the positioning plate. The top pressing wheel is arranged on a lever, and the lever is rotatably connected to the central axis of the positioning plate. The lever is used to control the top pressing wheel to rotate around the positioning plate so that the pipe body sandwiched between the positioning plate and the top pressing wheel is bent. In order to make the pipe body easy to bend and the shape after bending is stable, the bent part is usually heated before bending, and then the bending is performed. The method is to burn or heat the pipe body through a heater, and then insert it into the bending device for bending. However, when bending, the top pressing wheel needs to move forward slowly so that the pipe body is gradually bent, that is, the bent part moves forward gradually, so when bending to the rear section, the temperature of the pipe body in this section has dropped very low. Summary of the invention

[0003] In order to solve the problem of temperature stability during tube bending and heating, the present invention proposes a small-diameter tube bending device, which utilizes a device that can move synchronously with the top pressure wheel to synchronize tube heating and bending, thereby stabilizing the bending portion.

[0004] The technical solution adopted by the present invention is to design a small-diameter pipe bending device, including a positioning plate and a top pressure wheel that can rotate around the positioning plate, the top pressure wheel is arranged on a lever, the lever is rotatably connected to the central axis of the positioning plate, the lever is used to control the top pressure wheel to rotate around the positioning plate so that the pipe body clamped between the positioning plate and the top pressure wheel is bent, and also includes a sliding sleeve that can be slidably sleeved on the pipe body, the sliding sleeve is provided with a heating element for heating the pipe body, the sleeve is connected to the lever by a connecting rod, and the two ends of the connecting rod are rotatably connected to the sleeve and the lever respectively.

[0005] In some embodiments, a support wheel for supporting the positioning plate is disposed at the end of the sliding sleeve.

[0006] In some embodiments, the positioning plate has heat dissipation holes distributed around its circumference.

[0007] In some embodiments, a fan corresponding to the heat dissipation hole is connected to the lever.

[0008] In some embodiments, the lever is connected to a rocker arm, and a power wheel is provided on the rocker arm. After the lever causes the tube body to bend, the power wheel is in frictional contact with the tube body, and the power wheel is controlled to rotate by a power device.

[0009] In some embodiments, a guide wheel is disposed inside the sleeve to radially support the exterior of the tube body.

[0010] In some embodiments, the swing arm is rotatably connected to the central axis, and the swing arm is connected to the lever via a spring.

[0011] In some embodiments, a positioning wheel is further included which is fixed at a position corresponding to the power wheel. After the lever causes the tube to be bent, the tube is clamped between the power wheel and the positioning wheel.

[0012] In some embodiments, the connecting rod is a telescopic rod with variable length.

[0013] In some embodiments, the telescopic rod includes two rod bodies that are slidably nested and connected, and the two rod bodies are connected by a return spring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes a device that can move synchronously with the pressing wheel, so that the heating and bending of the tube body are carried out synchronously, so that the bending part is stable. The lever enables the pressing wheel to rotate relative to the positioning plate to bend the tube body, and the sliding sleeve moves forward in front of the pressing wheel under the action of the connecting rod, and heats the tube body while moving, so that the pressing wheel behind can press the tube body to bend the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is described in detail below in conjunction with specific embodiments and drawings. In order to show details and facilitate understanding of its principles, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Among them: Figure 1 Schematic diagram of a small-diameter pipe bending device according to an embodiment.

[0016] Figure 2 This is a schematic diagram of the tube after being bent.

[0017] Figure 3 It is a schematic diagram of the tube being pushed away from the positioning plate by the power wheel.

[0018] In the figure, 1. positioning plate; 2. top pressure wheel; 3. lever; 4. central axis; 5. tube body; 6. sliding sleeve; 7. heating element; 8. connecting rod; 9. supporting wheel; 10. heat dissipation hole; 11. fan; 12. rocker arm; 13. power wheel; 14. guide wheel; 15. tension spring; 16. positioning wheel; 17. reset spring. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required for the solutions of the invention.

[0020] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments. Example

[0021] like Figure 1 , 2 As shown in Figure 3, a small-diameter pipe bending device comprises a positioning plate 1 and a pressing wheel 2 that can rotate around the positioning plate 1, wherein the pressing wheel 2 is arranged on a lever 3, wherein the lever 3 is rotationally connected to the central axis 4 of the positioning plate 1, and the pressing wheel 2 is controlled by the lever 3 to rotate around the positioning plate 1 so that the pipe body 5 sandwiched between the positioning plate 1 and the pressing wheel 2 is bent, and further comprises a sliding sleeve 6 that can be slidably sleeved on the pipe body 5, wherein the sliding sleeve 6 is provided with a heating element 7 for heating the pipe body 5, wherein the sleeve is connected to the lever 3 through a connecting rod 8, and the two ends of the connecting rod 8 are rotationally connected to the sleeve and the lever 3 respectively. The heating element 7 can be, for example, a spiral heating resistance wire. Thus, when the lever 3 causes the pressing wheel 2 to rotate relative to the positioning plate 1 to bend the pipe body 5, the sliding sleeve 6 moves forward in front of the pressing wheel 2 under the action of the connecting rod 8, and heats the pipe body 5 while moving, so that the pressing wheel 2 behind presses the pipe body 5 to bend the pipe body 5.

[0022] The end of the sliding sleeve 6 is provided with a supporting wheel 9 for supporting the positioning plate 1, so as to facilitate rolling contact support between the end of the sliding sleeve 6 and the positioning plate 1. The positioning plate 1 is circumferentially provided with heat dissipation holes 10 to facilitate heat dissipation at the contact point between the bent tube body 5 and the positioning plate 1.

[0023] The lever 3 is connected to a fan 11 corresponding to the heat dissipation hole 10. The fan 11 is used to strengthen the airflow through the heat dissipation hole 10, thereby improving the heat dissipation performance. The fan 11 rotates with the lever 3, so that the risk heat dissipation position rotates with the lever 3, so as to timely dissipate heat at the contact point between the tube body 5 and the positioning plate 1.

[0024] The lever 3 is connected to the rocker arm 12, and a power wheel 13 is provided on the rocker arm 12. The lever 3 makes the power wheel 13 frictionally contact with the tube body 5 after the tube body 5 is bent. The power wheel 13 is controlled to rotate by a power device, for example, by a motor. When the power wheel 13 frictionally contacts with the tube body 5, the power wheel 13 rotates, so that the friction force is used to move the tube body 5 forward and disengage from the positioning plate 1, so as to realize the unloading of the bent tube body 5, so as to facilitate the bending of the next tube body 5.

[0025] A guide wheel 14 is provided in the sleeve for radially supporting the outside of the tube body 5 . The guide wheel 14 enables the sleeve to move smoothly along the tube body 5 and maintains the distance between the inner wall of the sleeve and the tube body 5 .

[0026] The rocker arm 12 is rotationally connected to the central axis 4, and the rocker arm 12 is connected to the lever 3 via a tension spring 15, so that the angle of the rocker arm 12 relative to the central axis 4 can float within a certain range, so that the power wheel 13 has a better top pressure on the tube body 5.

[0027] It also includes a positioning wheel 16 fixed at a position corresponding to the power wheel 13, so that when the lever 3 bends the tube 5, the tube 5 is clamped between the power wheel 13 and the positioning wheel 16, and then the power wheel 13 rotates to push the tube 5 forward. At the same time, the positioning wheel 16 is also helpful in preventing the tube 5 from tilting up when the tube 5 is bent, that is, the force couple of the positioning wheel 16 and the positioning plate 1 acting on the tube 5 offsets the force couple of the top pressure wheel 2 and the positioning plate 1 on the tube 5.

[0028] The connecting rod 8 is a telescopic rod with variable length. Specifically, the telescopic rod includes two rod bodies that are slidably nested and connected. The two rod bodies are connected by a reset spring 17. The reset spring 17 generates a pulling force on the sleeve toward the positioning plate 1, thereby ensuring that the sleeve is always close to the positioning plate 1.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them in similar ways, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0030] Although some terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention. The execution order of actions, steps, etc. in the devices and methods shown in the specification and the drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar sequential terms (for example, "first", "next", "secondly", "again", "then", etc.) used for the convenience of description do not mean that they must be implemented in such an order.

Claims

1. A small diameter pipe bending device, comprising a positioning plate and a pressing wheel capable of rotating around the positioning plate, wherein the pressing wheel is arranged on a lever, the lever is rotationally connected to the central axis of the positioning plate, and the lever is used to control the pressing wheel to rotate around the positioning plate so that the pipe body sandwiched between the positioning plate and the pressing wheel is bent, characterized in that: It also includes a sliding sleeve which is slidably sleeved on the tube body, the sliding sleeve is provided with a heating element for heating the tube body, the sleeve is connected to the lever through a connecting rod, and the two ends of the connecting rod are respectively rotatably connected to the sleeve and the lever.

2. The small diameter pipe bending device according to claim 1, characterized in that: A supporting wheel for supporting the positioning plate is arranged at the end of the sliding sleeve.

3. The small diameter pipe bending device according to claim 1, characterized in that: The positioning plate is provided with heat dissipation holes distributed in the circumference.

4. The small diameter pipe bending device according to claim 3, characterized in that: The lever is connected with a fan corresponding to the heat dissipation hole.

5. The small diameter pipe bending device according to claim 1, characterized in that: The lever is connected to the swing rod, and a power wheel is arranged on the swing rod. After the tube body is bent by the lever, the power wheel is in frictional contact with the tube body, and the power wheel is controlled to rotate by a power device.

6. The small diameter pipe bending device according to claim 5, characterized in that: A guide wheel is arranged inside the sleeve to radially support the outside of the tube body.

7. The small diameter pipe bending device according to claim 5, characterized in that: The swing rod is rotatably connected to the central axis, and the swing rod is connected to the lever through a spring.

8. The small diameter pipe bending device according to claim 5, characterized in that: It also includes a positioning wheel fixed at a position corresponding to the power wheel. After the lever causes the tube to be bent, the tube is clamped between the power wheel and the positioning wheel.

9. The small diameter pipe bending device according to claim 1, characterized in that: The connecting rod is a telescopic rod with variable length.

10. The small diameter pipe bending device according to claim 9, characterized in that: The telescopic rod comprises two rod bodies which are connected in a sliding nested manner, and the two rod bodies are connected via a return spring.

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