A device for flattening the end of a pipe

Abstract

The application relates to the technical field of flattening of a round pipe end, in particular to a round pipe end flattening device, which comprises a round pipe end, the round pipe end is sequentially provided with an inclined part and a horizontal part towards the direction of the end of the round pipe end, the two sides of the inclined part and the horizontal part are fixedly connected with side edge curling parts for increasing rigidity and playing a limiting role, the inner side of the horizontal part is provided with perforations for playing a connecting role, the round pipe end in the application is provided with the inclined part, the horizontal part, the side edge curling part and the perforations, the side edge curling part is hollow inside, the side edge curling part is arranged on the two sides of the perforations, the arrangement of the side edge curling part can play a limiting role on the bolt passing through the inside of the perforations, wherein, because the side edge curling part is hollow inside, the side edge curling part can generate certain deformation after being stressed, the bolt head for connection is embedded in the side edge curling part, and the bolt is prevented from being loosened by stress rotation after long-time use.

Description

Technical Field

[0001] This invention relates to the field of flattening the ends of round tubes, specifically to a flattening device for the ends of round tubes. Background Technology

[0002] Bracing and tie rods, as the main load-bearing and force-transmitting components, have become an important part of the steel structure system. Currently, the commonly used bracing in steel structure design includes angle steel, round steel, H-beams, and round tubes. Round tube cross-section bracing is widely used due to its high lateral stiffness, beautiful shape, and ease of processing, fabrication, and installation. The end connection methods and treatments of steel components have always been an important research topic in the steel structure industry.

[0003] like Figure 1 As shown, the existing round tube flattening structure simply flattens the end of the round tube and opens a groove on its upper side for bolts to pass through for connection.

[0004] In recent years, the application fields of steel structure technology have been continuously expanding, among which the selection of tubular sections as structural components is very common in structural design. However, since tubular section members are connected to other components, the traditional methods generally use two methods: welding end plates or end clamping.

[0005] The welding end plate method is as follows: a groove is cut at the end of the round tube, a steel plate is inserted and welded to form a connecting plate, bolt holes are made on the connecting plate, and it is connected to the main structural component through the bolt holes. The end of the round tube is sealed with a steel plate by welding. This method of welding the end of the round tube pressure rod to form the connecting end is relatively complicated in terms of manufacturing process. It requires three processes: grooving, welding and drilling. The operation is complicated and the production efficiency is not high.

[0006] Flattening the ends will severely reduce the lateral bending stiffness and strength of the pipe ends, making the pipe ends very easy to bend during use.

[0007] Therefore, in order to address the above problems, a flattening device for the end of a round tube is proposed. This invention differs from the traditional method, which simplifies and facilitates the processing of the cut end of the tube, greatly reduces the processing cost, and significantly improves the stiffness and strength of the processed component end, thus avoiding bending. Summary of the Invention

[0008] The purpose of this invention is to provide a flattening device for the end of a round tube, which, unlike traditional methods, simplifies and facilitates the processing of the end of the tube cross section, greatly reduces processing costs, and significantly improves the stiffness and strength of the processed component end, thus preventing bending.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a round tube end flattening device for flattening a round tube flattening structure, the round tube flattening structure including a round tube end, the round tube end having an inclined part and a horizontal part arranged sequentially in the direction of its end, the inclined part and the horizontal part having side curled parts fixedly connected to both sides for increasing rigidity and playing a limiting role, and the horizontal part having a through hole for connecting.

[0010] Under the above configuration, the end of the circular tube in this invention is provided with an inclined portion, a horizontal portion, a side-curled portion, and a through hole. The side-curled portion is hollow inside and is located on both sides of the through hole. The side-curled portion can limit the bolt passing through the through hole. Because the side-curled portion is hollow inside, it can deform under force, which facilitates the bolt head for connection to be embedded in the side-curled portion, preventing the bolt from loosening due to rotation after long-term use and achieving a more stable connection. The side-curled portion increases the thickness of the end of the circular tube to a certain extent and can also increase the lateral bending strength of the end of the circular tube. Preferably, the flattening device includes a base capable of holding a round tube, a gantry frame fixedly connected to the top of the base, a slide plate slidably connected to the outer side of the gantry frame, a first hydraulic rod fixedly connected to the top of the gantry frame, and the movable end of the first hydraulic rod fixedly connected to the top of the slide plate, thereby realizing the lifting and lowering movement of the slide plate by extending and retracting the first hydraulic rod. The bottom end of the slide is fixedly connected to an outer rod, and the bottom end of the outer rod is fixedly connected to a pressure plate. The bottom shape of the pressure plate matches the inclined and horizontal parts of the end of the round tube. The end of the round tube is flattened by pressing down on the pressure plate.

[0011] Under the above settings, when the present invention is used, the round tube is placed under the pressure plate, the movable end of the first hydraulic rod descends, the movable end of the first hydraulic rod drives the slide plate to descend, and the slide plate drives the pressure plate to descend through the outer rod, thereby flattening the round tube. During the process of the pressure plate pressing down, the height of the round tube decreases and the width increases. Preferably, a groove is provided at the middle of the inner side of the front end of the base. Two synchronously moving sliders are slidably connected to the inner side of the groove. A horizontal telescopic rod is fixedly connected to the inner side of both ends of the groove. The movable end of the horizontal telescopic rod is fixedly connected to the slider on the same side. A vertical telescopic rod is fixedly connected to the top of the slider. A solid rod parallel to the surface of the base is fixedly connected to the top of the vertical telescopic rod. The solid rod can be placed inside the round tube.

[0012] Preferably, an inner plate is fixedly connected to each of the two solid rods on the side facing each other, and a horizontal plate is slidably connected to the outer side of the inner plate, with an opening on the horizontal plate.

[0013] Preferably, the transverse telescopic rod includes a first outer cylinder, a first piston is slidably connected to the inner side of the first outer cylinder, a first sliding rod is fixedly connected to one end of the first piston, and a tension spring is provided on the inner side of the first outer cylinder, with the two ends of the tension spring being fixedly connected to one end of the first piston and the inner side of one end of the first outer cylinder, respectively.

[0014] Preferably, the vertical telescopic rod includes a second outer cylinder, a second piston is slidably connected to the inner side of the second outer cylinder, a second slide rod is fixedly connected to the top of the second piston, the top of the second slide rod is fixedly connected to the bottom end of the solid rod, and the inner side of the bottom end of the second outer cylinder is connected to the inner side of the end of the first outer cylinder near the center of the slide groove through a flexible hose.

[0015] Under the above settings, the specific steps of using the present invention are as follows: place the round tube under the pressure plate, place the two solid rods against the tension of the tension spring inside the round tube, and as the solid rods move towards the center, the first piston also moves towards the center. The gas in the first outer cylinder will enter the inner side of the second outer cylinder through the hose. At this time, the top of the second sliding rod will drive the solid rod to move upward. Release the solid rod, and the solid rod will stick to the center diameter of the round tube to limit the round tube. As the pressure plate descends, it flattens the round tube. During the downward pressing process, the height of the round tube decreases and its width increases. The gas in the second outer cylinder will enter the inner side of the first outer cylinder through the hose. At this time, the top of the second sliding rod will drive the solid rod to move downward. The two solid rods move to the sides under the action of the tension spring. As the pressure plate continues to descend, the round tube is flattened under the blocking action of the solid rod and the horizontal plate. At the same time, the side curling part appears, achieving flattening. After the pressure plate is pressed down, the movable end of the second hydraulic rod descends, driving the cutting cylinder downward through the inner rod to punch holes in the end of the round tube, ultimately achieving the flattened structure described above.

[0016] Preferably, an inner rod is slidably connected to the inner side of the outer rod, and a cutting cylinder is fixedly connected to the bottom end of the inner rod. The position of the cutting cylinder corresponds to the opening on the horizontal plate.

[0017] Preferably, a connecting frame is fixedly connected to the top of the slide plate, and a second hydraulic rod is fixedly connected to one side of the connecting frame. The movable end of the second hydraulic rod is fixedly connected to the top of the inner rod, and the cutting cylinder moves up and down by extending and retracting the movable end of the second hydraulic rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention relates to a flattened cylindrical tube structure. The cylindrical tube end of the invention is provided with an inclined portion, a horizontal portion, a side-curled portion, and a through hole. The side-curled portion is hollow inside and is located on both sides of the through hole. The side-curled portion can limit the bolt passing through the through hole. Because the side-curled portion is hollow inside, it can deform under force, which facilitates the bolt head for connection to be embedded in the side-curled portion. This prevents the bolt from loosening due to rotation after long-term use and achieves a more stable connection. The side-curled portion increases the thickness of the cylindrical tube end to a certain extent and also increases the lateral bending strength of the cylindrical tube end.

[0019] 2. The round tube end flattening device places the round tube under the pressure plate, the movable end of the first hydraulic rod descends, the movable end of the first hydraulic rod drives the slide plate to descend, the slide plate drives the pressure plate to descend through the outer rod, thereby flattening the round tube. During the process of the pressure plate pressing down, the height of the round tube decreases and the width increases.

[0020] 3. The specific steps of using this round tube end flattening device are as follows: place the round tube under the pressure plate, place two solid rods against the tension of the tension spring inside the round tube, and as the solid rods move towards the center, the first piston also moves towards the center. The gas in the first outer cylinder will enter the inner side of the second outer cylinder through the hose. At this time, the top of the second sliding rod will drive the solid rod to move upward. Release the solid rod, and the solid rod will stick to the center diameter of the round tube to limit the round tube.

[0021] 4. This is a flattening device for the end of a round tube. The pressure plate descends to flatten the round tube. During the downward pressing of the pressure plate, the height of the round tube decreases and the width increases. The gas in the second outer cylinder will enter the inner side of the first outer cylinder through the hose. At this time, the top of the second sliding rod will drive the solid rod to move downward. The two solid rods move to the sides respectively under the action of the tension spring. As the pressure plate continues to descend, the round tube is flattened under the blocking action of the solid rod and the horizontal plate. At the same time, the side curling part appears, realizing the flattening.

[0022] 5. In this round tube end flattening device, after the pressure plate is pressed down, the movable end of the second hydraulic rod descends, and the inner rod drives the cutting cylinder to move downward, thereby realizing the punching of the round tube end and finally achieving the above-mentioned flattening structure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the existing circular tube end structure.

[0024] Figure 2 This is a schematic diagram of the installation structure after the end of the round tube of the present invention has been flattened; Figure 3 This is a side view of the mounting structure at the end of the circular tube of the present invention; Figure 4 This is a schematic diagram of the installation structure of the flattening device of the present invention; Figure 5 This is a schematic diagram of the external structure of the horizontal plate of the present invention; Figure 6 This is a cross-sectional view of the installation structure at the horizontal plate of the present invention; Figure 7 This is a cross-sectional view of the vertical telescopic rod of the present invention; Figure 8 This is a cross-sectional view of the transverse telescopic rod of the present invention. Figure 9 This is a cross-sectional view of the mounting structure at the pressure plate of the present invention; Figure 10 This is a schematic diagram of the mounting structure at the slider of the present invention; Figure 11 For the present invention Figure 4 The installation structure diagram at point A is shown in the image.

[0025] In the diagram: 1. End of round tube; 1a. Inclined section; 1b. Horizontal section; 1c. Side curled section; 1d. Perforation; 2. Base; 3. Slide groove; 4. Slider; 5. Horizontal plate; 6. Round tube; 7. Gantry frame; 8. First hydraulic rod; 9. Connecting frame; 10. Second hydraulic rod; 11. Outer rod; 12. Slide plate; 13. Pressure plate; 14. Solid rod; 15. Opening; 16. Inner plate; 17. Inner rod; 18. Horizontal telescopic rod; 19. Flexible hose; 20. Vertical telescopic rod; 21. Cutting cylinder 181. First outer cylinder; 182. Tension spring; 183. First sliding rod; 184. First piston; 201. Second outer cylinder; 202. Second piston; 203. Second sliding rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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. Example

[0027] Please see Figure 1-3 The present invention provides a technical solution: A flattening structure for a round tube is provided for flattening the round tube. It includes a round tube end 1, and an inclined part 1a and a horizontal part 1b are arranged sequentially in the direction of the end of the round tube 1. The inclined part 1a and the horizontal part 1b are fixedly connected to the sides of the inclined part 1a and the horizontal part 1b, which are used to increase rigidity and play a limiting role. The horizontal part 1b has a through hole 1d for connecting.

[0028] In the above configuration, the cylindrical tube end 1 of the present invention is provided with an inclined portion 1a, a horizontal portion 1b, a side-curled portion 1c, and a through hole 1d. The side-curled portion 1c is hollow inside and is located on both sides of the through hole 1d. The side-curled portion 1c can limit the bolt passing through the through hole 1d. Since the side-curled portion 1c is hollow inside, it can deform under force, which facilitates the bolt head used for connection to be embedded in the side-curled portion 1c, preventing the bolt from loosening due to rotation after long-term use and achieving a more stable connection. The side-curled portion 1c increases the thickness of the cylindrical tube end 1 to a certain extent and can also increase the lateral bending strength of the cylindrical tube end 1. Example

[0029] Please see Figures 1-11 The tube end flattening device includes a base 2 that can hold a tube 6, a gantry 7 that is fixedly connected to the top of the base 2, a slide plate 12 that is slidably connected to the outside of the gantry 7, a first hydraulic rod 8 that is fixedly connected to the top of the gantry 7, and the movable end of the first hydraulic rod 8 that is fixedly connected to the top of the slide plate 12. The sliding plate 12 is raised and lowered by the extension and retraction of the first hydraulic rod 8. The bottom end of the slide plate 12 is fixedly connected to an outer rod 11, and the bottom end of the outer rod 11 is fixedly connected to a pressure plate 13. The bottom shape of the pressure plate 13 matches the inclined part 1a and the horizontal part 1b of the end of the round tube 1. The end of the round tube 1 is flattened by pressing down the pressure plate 13.

[0030] Under the above settings, when the present invention is used, the round tube 6 is placed under the pressure plate 13, the movable end of the first hydraulic rod 8 descends, the movable end of the first hydraulic rod 8 drives the slide plate 12 to descend, and the slide plate 12 drives the pressure plate 13 to descend through the outer rod 11, thereby flattening the round tube 6. During the process of the pressure plate 13 pressing down, the height of the round tube 6 decreases and the width increases. Specifically, a groove 3 is provided in the middle of the inner side of the front end of the base 2. Two synchronously moving sliders 4 are slidably connected to the inner side of the groove 3. A horizontal telescopic rod 18 is fixedly connected to the inner side of both ends of the groove 3. The movable end of the horizontal telescopic rod 18 is fixedly connected to the slider 4 on the same side. A vertical telescopic rod 20 is fixedly connected to the top of the slider 4. A solid rod 14 parallel to the surface of the base 2 is fixedly connected to the top of the vertical telescopic rod 20. The solid rod 14 can be placed inside the round tube 6.

[0031] Specifically, an inner plate 16 is fixedly connected to the side of each of the two solid rods 14 facing each other, and a horizontal plate 5 is slidably connected to the outside of the inner plate 16. An opening 15 is provided on the horizontal plate 5.

[0032] Specifically, the transverse telescopic rod 18 includes a first outer cylinder 181, a first piston 184 is slidably connected to the inner side of the first outer cylinder 181, a first slide rod 183 is fixedly connected to one end of the first piston 184, and a tension spring 182 is provided on the inner side of the first outer cylinder 181. The two ends of the tension spring 182 are fixedly connected to one end of the first piston 184 and the inner side of one end of the first outer cylinder 181, respectively.

[0033] The vertical telescopic rod 20 includes a second outer cylinder 201, a second piston 202 is slidably connected to the inner side of the second outer cylinder 201, a second slide rod 203 is fixedly connected to the top of the second piston 202, the top of the second slide rod 203 is fixedly connected to the bottom end of the solid rod 14, and the inner side of the bottom end of the second outer cylinder 201 is connected to the inner side of the end of the first outer cylinder 181 near the center of the slide groove 3 through a flexible hose 19.

[0034] Under the above settings, the specific steps of using the present invention are as follows: place the round tube 6 under the pressure plate 13, and place the two solid rods 14 against the tension of the tension spring 182 inside the round tube 6. As the solid rods 14 move towards the center, the first piston 184 also moves towards the center. The gas in the first outer cylinder 181 will enter the inner side of the second outer cylinder 201 through the hose 19. At this time, the top of the second slide rod 203 will drive the solid rods 14 to move upward. Release the solid rods 14, and the solid rods 14 will stick to the center diameter of the round tube 6 to limit the round tube 6. As the pressure plate 13 descends, it flattens the round tube 6. During the downward pressing of the pressure plate 13, the height of the round tube 6 decreases and its width increases. The gas inside the second outer cylinder 201 enters the inner side of the first outer cylinder 181 through the hose 19. At this time, the top of the second slide rod 203 will drive the solid rod 14 to move downward. The two solid rods 14 move to the sides under the action of the tension spring 182. As the pressure plate 13 continues to descend, the round tube 6 is flattened under the blocking action of the solid rod 14 and the horizontal plate 5. At the same time, the side curled part 1c appears, achieving flattening. After the pressure plate 13 is pressed down, the movable end of the second hydraulic rod 10 descends, and the inner rod 17 drives the cutting cylinder 21 to move downward, thereby punching a hole in the end 1 of the round tube and finally achieving the flattened structure described above.

[0035] Specifically, an inner rod 17 is slidably connected to the inner side of the outer rod 11, and a cutting cylinder 21 is fixedly connected to the bottom end of the inner rod 17. The position of the cutting cylinder 21 corresponds to the opening 15 on the horizontal plate 5.

[0036] Specifically, a connecting frame 9 is fixedly connected to the top of the slide plate 12, and a second hydraulic rod 10 is fixedly connected to one side of the connecting frame 9. The movable end of the second hydraulic rod 10 is fixedly connected to the top of the inner rod 17, and the cutting cylinder 21 moves up and down by extending and retracting the movable end of the second hydraulic rod 10.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flattening device for the end of a round tube, used for flattening a round tube structure, characterized in that: The flattened tube structure includes a tube end, with an inclined part and a horizontal part arranged sequentially towards its end. Both sides of the inclined part and the horizontal part are fixedly connected with side curled parts for increasing rigidity and limiting the position. The inner side of the horizontal part is provided with a through hole for connecting. The flattening device includes a base for placing a round tube, a gantry frame fixedly connected to the top of the base, a slide plate slidably connected to the outside of the gantry frame, a first hydraulic rod fixedly connected to the top of the gantry frame, and the movable end of the first hydraulic rod fixedly connected to the top of the slide plate. The sliding plate can be raised or lowered by extending or retracting the first hydraulic rod. The bottom end of the slide is fixedly connected to an outer rod, and the bottom end of the outer rod is fixedly connected to a pressure plate. The shape of the bottom end of the pressure plate matches the inclined and horizontal parts of the end of the round tube. The end of the round tube is flattened by pressing down the pressure plate. A groove is provided in the middle of the inner side of the front end of the base. Two synchronously moving sliders are slidably connected to the inner side of the groove. A horizontal telescopic rod is fixedly connected to the inner side of both ends of the groove. The movable end of the horizontal telescopic rod is fixedly connected to the slider on the same side. A vertical telescopic rod is fixedly connected to the top of the slider. A solid rod parallel to the surface of the base is fixedly connected to the top of the vertical telescopic rod. The solid rod can be placed inside the round tube.

2. The tube end flattening device according to claim 1, characterized in that: Both solid rods are fixedly connected to an inner plate on their opposite sides, and a horizontal plate is slidably connected to the outer side of the inner plate, with an opening on the horizontal plate.

3. The tube end flattening device according to claim 2, characterized in that: The transverse telescopic rod includes a first outer cylinder, a first piston is slidably connected to the inner side of the first outer cylinder, a first sliding rod is fixedly connected to one end of the first piston, and a tension spring is provided on the inner side of the first outer cylinder, with the two ends of the tension spring being fixedly connected to one end of the first piston and the inner side of one end of the first outer cylinder, respectively.

4. The tube end flattening device according to claim 3, characterized in that: The vertical telescopic rod includes a second outer cylinder, a second piston is slidably connected to the inner side of the second outer cylinder, a second slide rod is fixedly connected to the top of the second piston, the top of the second slide rod is fixedly connected to the bottom end of the solid rod, and the inner side of the bottom end of the second outer cylinder is connected to the inner side of the end of the first outer cylinder near the center of the slide groove through a flexible hose.

5. The tube end flattening device according to claim 4, characterized in that: An inner rod is slidably connected to the inner side of the outer rod, and a cutting cylinder is fixedly connected to the bottom end of the inner rod. The position of the cutting cylinder corresponds to the opening on the horizontal plate.

6. The tube end flattening device according to claim 5, characterized in that: A connecting frame is fixedly connected to the top of the slide plate, and a second hydraulic rod is fixedly connected to one side of the connecting frame. The movable end of the second hydraulic rod is fixedly connected to the top of the inner rod. The cutting cylinder moves up and down by extending and retracting the movable end of the second hydraulic rod.

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