A hydraulic engineering pipeline butt joint device

Abstract

The utility model relates to a hydraulic engineering pipeline butt joint device relates to pipeline butt joint technical field, including support platform, the top of support platform is equipped with two synchronous opposite or relative sliding arrangement of moving plate, and the top of two moving plate is equipped with clamping mechanism respectively, and clamping mechanism includes the fixed ring that sets up horizontally, and the one end of fixed ring is evenly distributed with a plurality of sliding plates along its circumference, and a plurality of sliding plates are synchronous opposite or relative sliding arrangement along the radial direction of fixed ring, and the one end of a plurality of sliding plates in fixed ring is fixedly equipped with the horizontal setting of positioning column, and a plurality of positioning columns synchronous opposite or relative sliding process, and the circle of a plurality of positioning column outer wall tangent all the time with fixed ring coaxial. The utility model solves the problem of the existing hydraulic engineering pipeline butt joint device when adjusting the pipe orifice of two pipelines, and the adjustment process is complicated, and the coaxiality is low, when the pipeline is butted, the pipe orifice of the pipeline is uneven, leading to the problem of poor butt joint effect.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, specifically to a pipeline connection device for water conservancy projects. Background Technology

[0002] Water conservancy projects are engineering projects constructed to control and regulate surface water and groundwater in nature to achieve the goals of mitigating harm and promoting benefits. The construction of water conservancy projects requires the laying of pipelines to transport water resources, control water flow, prevent floods, and regulate and distribute water volume to meet the water needs of people's lives and production. During construction, pipelines need to be connected. Connecting pipelines involves first aligning the ends of the two pipes, and then welding them. There are two main existing methods for connecting pipelines: First, using a hoist to lift two pipes of the same size and then manually aligning the ends; second, using a pipeline connection device to align the ends of the two pipes.

[0003] The two pipe connection methods mentioned above have gradually revealed their shortcomings during use, mainly in the following aspects: First, after the hoist lifts two identical pipes, the adjustment process for the pipe ends by the operators is cumbersome, time-consuming, and labor-intensive, resulting in low pipe welding efficiency. Furthermore, the pipe ends cannot maintain a stable state after being aligned, and the two pipes are prone to movement, causing the pipe ends to be misaligned. This results in low coaxiality of the two pipe ends when welding them, leading to poor pipe welding results.

[0004] Second, a patent with publication number CN211175627U is disclosed in the prior art. This solution includes a connecting half-ring, a movable half-ring, and a pipe. The connecting half-ring and the movable half-ring are located at the top and bottom of the pipe's connection point, respectively. Hollow connecting blocks are fixedly connected to the front and back sides of the connecting half-ring and the movable half-ring on the side closest to each other. Pipe connection devices, including the aforementioned patent, still have the following problems during use: The same docking device can only dock pipes of the same specification. When docking pipes of different specifications, it is necessary to replace the docking device with the corresponding specification, which results in poor practicality of the device. Furthermore, when docking two pipes, it is necessary not only to adjust the pipe ends of the two pipes to be welded, but also to adjust the pipe bodies of the two pipes to make them coaxial. The pipe body adjustment process is cumbersome, which leads to a long pipe welding cycle and reduces the pipe welding efficiency.

[0005] Third, after the pipe ends of the two pipes are aligned, the operator uses a welding torch to weld the pipe ends. However, the pipe ends are more or less uneven, and the aligned pipe ends are not perfectly fitted, but have many gaps, which affects the welding quality of the pipes.

[0006] Fourth, when operators use welding torches to weld the ends of two pipes, they need to weld one side of the pipe end first. After one side is welded, the operator needs to move the welding torch to the other side of the pipe end and weld the other side. The welding process is time-consuming and labor-intensive, increasing the labor intensity of the operators.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a pipe docking device for water conservancy projects. This device can quickly fix two pipes to be welded, and the two pipes are coaxial after fixing. The pipe fixing process is simple, and the coaxiality of the two pipes after fixing is high. The device can also connect pipes of different specifications, which improves the device's practicality; The device can also process the pipe ends of the two pipes to be welded, making the pipe ends flat and ensuring the welding quality of the pipes. The device also enables rapid welding of pipes without the operator moving, improving welding efficiency and reducing the labor intensity of the operator.

[0009] To address the above problems, the present invention provides the following technical solution: A water conservancy project pipeline connection device includes a support platform. Two movable plates, synchronously facing or sliding relative to each other, are horizontally mounted on the top of the support platform. Each of the two movable plates has a clamping mechanism on its top. The clamping mechanism can quickly clamp two pipes to be welded, and the two pipes are coaxial after clamping; the clamping mechanism can also clamp pipes of different specifications. The clamping mechanism includes a horizontally arranged fixed ring. A plurality of sliding plates are evenly distributed along the circumference of one end of the fixed ring. The plurality of sliding plates are synchronously slid relative to each other or towards each other along the radial direction of the fixed ring. A horizontally arranged positioning post is fixed at one end of each sliding plate inside the fixed ring. During the synchronous or relative sliding of the plurality of positioning posts, the circle tangent to the outer wall of the plurality of positioning posts is always coaxial with the fixed ring. The two fixed rings are coaxially arranged, and each fixed ring has a tail centering component on one side, with the two fixed rings located between the two tail centering components; When several positioning posts slide synchronously towards each other until they abut against the outer wall of the pipe, the pipe end to be welded is coaxial with the fixed ring, and the non-welded pipe end of the pipe can be quickly adjusted to be coaxial with the fixed ring through the tail centering component.

[0010] As an optimized solution, the tail centering component includes a horizontally sliding rotating plate, which also rotates along a vertical line. At one end of the rotating plate near the fixed ring, there is a support circular plate coaxially arranged with the fixed ring. Several horizontally arranged top plates are evenly distributed along the circumference of the end of the support circular plate, and these top plates also slide synchronously or relative to each other along the radial direction of the support circular plate. The outer walls of the several top plates are all arc-shaped structures. During the process of the several top plates sliding synchronously towards each other or relative to each other, the circle that is tangent to the arc-shaped ends of the several top plates is always coaxial with the supporting circular plate. Sliding the rotating plate away from the fixed ring facilitates inserting one end of the pipe to be connected into the fixed ring. Sliding the rotating plate away from the fixed ring and rotating it along a vertical line facilitates removing the pipe after welding. When the arc-shaped ends of the top plates slide synchronously relative to each other until they abut against the inner wall of the pipe, the pipe and the supporting circular plate are coaxial.

[0011] As an optimized solution, each of the two fixed rings is coaxially fitted with a rotating ring that is fixedly connected to it. The two rotating rings are synchronously rotated along the axis of the fixed rings. The two supporting circular plates are rotatably connected to the two rotating plates. When the two rotating rings rotate synchronously, they drive the two pipes that have been docked to rotate. The operator can complete the welding work on the pipes by standing on one side of the support platform.

[0012] As an optimized solution, several fixed connecting plates are evenly distributed around the other end of the fixed ring. The number of connecting plates is the same as that of the sliding plates. One end of each connecting plate extends outward from the fixed ring and is fixedly connected to the rotating ring. Each connecting plate is provided with a driven gear that rotates along a horizontal line at its end. Each sliding plate is provided with a driven rack that meshes with the driven gear at its end.

[0013] As an optimized solution, the end of the supporting circular plate is coaxially fixed to a fixed shaft. Several horizontally sliding arc plates are evenly distributed along the circumference of the outer wall of the fixed shaft. The number of sliding arc plates is the same as the number of top plates. Several swing plates are hinged to the outer wall of each sliding arc plate. The swing plates on the sliding arc plates are hinged to the top plates.

[0014] As an optimized solution, each of the movable plates is provided with a horizontally sliding support plate at its top, and a vertically fixed rod is fixedly provided at the top of the support plate. The fixed rod is inserted into the rotating plate and is rotatably connected to the rotating plate.

[0015] As an optimized solution, the top of each movable plate is fixedly provided with a vertically arranged fixing plate, and the end of each fixing plate is provided with a circular groove coaxially arranged with the fixing ring. Each circular groove is provided with an upper rotating tube rotatably connected to the inner wall of the fixing plate. One end of the upper rotating tube extends to the outside of the fixing plate and is coaxially fixed with the rotating ring.

[0016] As an optimized solution, the top of the support platform is provided with a double-threaded screw that rotates along a horizontal line. The two ends of the double-threaded screw extend into two movable plates and are threadedly connected to the two movable plates.

[0017] As an optimized solution, a grinding component is also provided between the two fixed rings, which can grind the pipe openings of the two pipes to be welded flat. The grinding assembly includes a U-shaped plate with its open end facing downward and sliding horizontally. The U-shaped plate is also vertically raised and lowered. Grinding wheels that rotate along a horizontal line are provided on the opposite outer walls of the U-shaped plate. When the U-shaped plate is lowered to its lowest position, both grinding wheels are coaxial with the fixed ring. When the moving plate slides towards each other until the pipe openings of the two pipes are in contact with the two grinding wheels, the grinding wheels grind the pipe openings.

[0018] As an optimized solution, a horizontally sliding bracket is provided above the two fixed rings, and a vertically positioned lifting plate is fixed to the top of the U-shaped plate. The top of the lifting plate extends upward through the sliding bracket and is vertically slidably connected to the sliding bracket.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. The clamping mechanism can quickly fix two pipes to be welded, and the two pipes are coaxial after fixing. The pipe fixing process is simple and the coaxiality of the two pipes after fixing is high. 2. The clamping mechanism can also quickly fix pipes of different specifications, thus enabling pipes of different specifications to be connected, which improves the practicality of the device. 3. The grinding component can grind the ends of the two pipes to be welded, making the ends of the two pipes flat and ensuring the welding quality of the pipes. 4. The clamping mechanism enables rapid welding of pipes without the operator moving, improving welding efficiency and reducing the labor intensity of the operator. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the positioning column of the present invention; Figure 3 This is a schematic diagram of the structure of the tail centering component of the present invention; Figure 4 This is a schematic diagram of the connecting plate of the present invention; Figure 5 This is a schematic diagram of the top plate of the present invention; Figure 6 This is a schematic diagram of the insertion rod of the present invention; Figure 7 This is a schematic diagram of the structure of the double-threaded lead screw of the present invention; Figure 8 This is a schematic diagram of the grinding assembly of the present invention; Figure 9 This is a schematic diagram of the pipe connection structure of the present invention; Figure 10 This is a schematic diagram of the structure of the present invention, showing the separation of the pipe and the clamping mechanism.

[0022] In the diagram: 1-Support platform; 2-Moving plate; 3-Tail centering component; 4-Pipe; 5-Clamping mechanism; 6-Grinding component; 7-Fixing ring; 8-Fixing plate; 9-Positioning column; 10-Drive gear; 11-Sliding plate; 12-Driven gear; 13-Upper rotating tube; 14-Rotating ring; 15-Driven rack; 16-Internal gear ring; 17-Control gear; 18-Transition gear; 19-External gear ring; 20-Connecting plate; 21-Motor base; 22-First drive motor; 23-Fixing shaft; 24-Supporting circular plate; 25-Top plate; 26-Sliding arc plate; 27-Moving circular plate; 28-Second drive motor; 29-Swing plate; 30-Single tooth screw; 31-Grinding wheel; 32- 33-Rotating rod; 34-Pull-out plate; 35-Slide rod; 36-Limiting plate; 37-Transition plate; 38-Sliding bracket; 39-Lifting plate; 40-Telescopic cylinder; 41-Fixed bracket; 42-U-shaped plate; 43-Drive wheel; 44-Control motor; 45-Transmission belt; 46-Driven wheel; 47-Slot; 48-Support plate; 49-Fixed rod; 50-Rotating plate; 51-Tension spring; 52-Insertion rod; 53-Allowing groove; 54-Rotating shaft; 55-Double threaded rod; 56-Circular groove; 57-Upper transmission gear; 58-Limiting bracket; 59-Lower transmission gear; 60-Built-in motor; 61-Third drive motor; 62-Driven shaft; 63-Connecting rod; 64-Lower rotating tube. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0024] like Figures 1 to 10 As shown, a water conservancy project pipeline docking device includes a support platform 1. Two movable plates 2 are horizontally mounted on the top of the support platform 1, sliding synchronously or relative to each other. Clamping mechanisms 5 are respectively mounted on the top of the two movable plates 2. The clamping mechanism 5 can quickly clamp two pipes 4 to be welded, and the two pipes 4 are coaxial after clamping; the clamping mechanism 5 can also clamp pipes 4 of different specifications. The clamping mechanism 5 includes a horizontally arranged fixed ring 7. A plurality of sliding plates 11 are evenly distributed along the circumference of one end of the fixed ring 7. The plurality of sliding plates 11 are synchronously slid relative to each other or towards each other along the radial direction of the fixed ring 7. A horizontally arranged positioning post 9 is fixed at one end of each of the plurality of sliding plates 11 located inside the fixed ring 7. During the process of the plurality of positioning posts 9 sliding synchronously towards each other or relative to each other, the circle tangent to the outer wall of the plurality of positioning posts 9 is always coaxial with the fixed ring 7. Two fixed rings 7 are coaxially arranged, and each fixed ring 7 has a tail centering component 3 on one side, with the two fixed rings 7 located between the two tail centering components 3; When several positioning posts 9 slide synchronously towards each other until they abut against the outer wall of the pipe 4, the pipe end to be welded of the pipe 4 is coaxial with the fixed ring 7, and the non-welded pipe end of the pipe 4 can be quickly adjusted to be coaxial with the fixed ring 7 through the tail centering component 3.

[0025] The rear centering component 3 includes a horizontally sliding rotating plate 50, which also rotates along a vertical line. At one end of the rotating plate 50 near the fixed ring 7, there is a support circular plate 24 coaxially arranged with the fixed ring 7. Several horizontally arranged top plates 25 are evenly distributed along the circumference of the end of the support circular plate 24. These top plates 25 also slide synchronously or relative to each other along the radial direction of the support circular plate 24. The outer walls of several top plates 25 are all arc-shaped structures. During the process of several top plates 25 sliding synchronously towards each other or relative to each other, the circle that is tangent to the arc-shaped ends of several top plates 25 is always coaxial with the supporting circular plate 24. Sliding the rotating plate 50 away from the fixed ring 7 facilitates inserting one end of the pipe 4 to be connected into the fixed ring 7. Sliding the rotating plate 50 towards the fixed ring 7 allows the top plate 25 to be inserted into the other end of the pipe 4 to be connected. Sliding the rotating plate 50 away from the fixed ring 7 and rotating it along the vertical line makes it easier to remove the welded pipe 4. When the arc-shaped ends of several top plates 25 slide synchronously relative to each other until they abut against the inner wall of the pipe 4, the pipe 4 and the supporting circular plate 24 are coaxial.

[0026] Two fixed rings 7 are each coaxially fitted with rotating rings 14 that are fixedly connected to them. The two rotating rings 14 are synchronously rotated along the axis of the fixed rings 7. The two supporting circular plates 24 are rotatably connected to the two rotating plates 50. When the two rotating rings 14 rotate synchronously, they drive the two pipes 4 that have been connected to rotate. The operator can complete the welding work of the pipes 4 by standing on one side of the support platform 1.

[0027] The other end of the fixed ring 7 has several fixed connecting plates 20 evenly distributed along its circumference. The number of connecting plates 20 is the same as that of the sliding plates 11. One end of each connecting plate 20 extends outward from the fixed ring 7 and is fixedly connected to the rotating ring 14. The end of each connecting plate 20 is provided with a driven gear 12 that rotates along the horizontal line. The end of each sliding plate 11 is fixedly provided with a driven rack 15 that meshes with the driven gear 12.

[0028] An internal gear ring 16 is rotatably mounted on the inner wall of the rotating ring 14 and is coaxially arranged therewith. Several driven gears 12 mesh with the internal gear ring 16.

[0029] A motor base 21 is fixedly provided at one end of the rotating ring 14, and a drive gear 10 is provided at one end of the motor base 21, which rotates along the horizontal line. The drive gear 10 meshes with the internal gear ring 16.

[0030] The other end of the motor base 21 is fixedly provided with a first drive motor 22. The output end of the first drive motor 22 passes through the motor base 21 and is fixedly connected to the drive gear 10.

[0031] Several sliding plates 11 are slidably connected to the rotating ring 14. A T-shaped sliding plate is fixed to the other end of each sliding plate 11. The same end of the fixed ring 7 and the rotating ring 14 is provided with a T-shaped groove that cooperates with the T-shaped sliding plate.

[0032] A fixed shaft 23 is coaxially fixed to the end of the supporting circular plate 24. Several horizontally sliding arc plates 26 are evenly distributed along the circumference of the outer wall of the fixed shaft 23. The number of sliding arc plates 26 is the same as the number of top plates 25. Several swing plates 29 are hinged to the outer wall of each sliding arc plate 26. The swing plates 29 on the several sliding arc plates 26 are hinged to the several top plates 25 respectively.

[0033] A movable circular plate 27 is horizontally slidably arranged on one side of the fixed shaft 23 and is coaxially arranged with it. One end of several sliding arc plates 26 extends out of the fixed shaft 23 and is fixedly connected to the movable circular plate 27.

[0034] The movable circular plate 27 is coaxially provided with a single-threaded screw 30 near the end of the fixed shaft 23. One end of the single-threaded screw 30 extends into the fixed shaft 23 and is threadedly connected to the fixed shaft 23.

[0035] A second drive motor 28 is fixedly provided at the other end of the movable circular plate 27. The output end of the second drive motor 28 passes through the movable circular plate 27 and is fixedly connected to the movable circular plate 27.

[0036] T-shaped sliding plates are fixedly provided on the end of the top plate 25 and the inner wall of the sliding arc plate 26, and T-shaped sliding grooves that cooperate with the T-shaped sliding plates are provided on the end of the supporting circular plate 24 and the outer wall of the fixed shaft 23.

[0037] The top of each movable plate 2 is provided with a horizontally sliding support plate 47, and the rotating plate 50 is rotatably connected to the support plate 47.

[0038] A vertically arranged fixing rod 48 is fixedly provided on the top of the support plate 47. The fixing rod 48 is inserted into the rotating plate 50 and is rotatably connected to the rotating plate 50.

[0039] The top of the rotating plate 50 is provided with a vertically arranged insertion rod 52, the bottom of the insertion rod 52 extends downward through the rotating plate 50, and the insertion rod 52 is vertically slidably connected to the rotating plate 50. The top of the support plate 47 is provided with two slots 46 that cooperate with the insertion rod 52.

[0040] A tension spring 51 is fitted on the outer wall of the insert rod 52 outside the rotating plate 50, and the two ends of the tension spring 51 are fixedly connected to the rotating plate 50 and the insert rod 52 respectively.

[0041] The bottom of each support plate 47 is fixed with a T-shaped sliding plate, and the top of each movable plate 2 is provided with a T-shaped groove that matches the T-shaped sliding plate.

[0042] The top of each movable plate 2 is fixedly provided with a vertically arranged fixed plate 8. The ends of each fixed plate 8 are provided with a circular groove 56 coaxially arranged with the fixed ring 7. The circular groove 56 is provided with an upper rotating tube 13 coaxially arranged with the inner wall of the fixed plate 8. One end of the upper rotating tube 13 extends to the outside of the fixed plate 8 and is coaxially fixed with the rotating ring 14.

[0043] The other end of the upper rotating tube 13 extends to the outside of the fixed plate 8 and is fixedly fitted with an external gear ring 19 coaxially arranged therewith. The opposite ends of the two fixed plates 8 are rotatably provided with transition gears 18 that mesh with the external gear ring 19.

[0044] The two fixed plates 8 are respectively provided with a lower rotating tube 64 and a driven shaft 62 that are rotatably arranged along the horizontal line at their opposite ends. One end of the driven shaft 62 extends into the lower rotating tube 64 and is slidably connected to the lower rotating tube 64. The other end of the driven shaft 62 passes through the fixed plate 8 and is fixedly connected to the transition gear 18. One end of the lower rotating tube 64 passes through another fixed plate 8 and the transition gear 18 respectively, and is fixedly connected to the transition gear 18.

[0045] One of the fixed plates 8 has a control gear 17 that meshes with the transition gear 18 at one end, and a third drive motor 61 is fixedly mounted at one end of the fixed plate 8. The output end of the third drive motor 61 passes through the fixed plate and is fixedly connected to the control gear 17.

[0046] Each of the two rotating plates 50 has a rotating rod 49 at its opposite ends that rotates along a horizontal line. The two rotating rods 49 are coaxially fixed to the two supporting circular plates 24.

[0047] The top of the support platform 1 is provided with a double-threaded screw 55 that rotates along the horizontal line. The two ends of the double-threaded screw 55 extend into the two movable plates 2 respectively and are threadedly connected to the two movable plates 2.

[0048] The double-tooth lead screw 55 is fitted with an upper transmission gear 57 that is fixedly connected to it. The top of the support platform 1 is provided with a clearance groove 53. The clearance groove 53 is provided with a rotating shaft 54 ​​that is arranged to rotate horizontally. The rotating shaft 54 ​​is fixedly fitted with a lower transmission gear 59 that meshes with the upper transmission gear 57.

[0049] The support platform 1 is equipped with a built-in motor 60. The output end of the built-in motor 60 extends into the clearance groove 53 and is fixedly connected to one end of the rotating shaft 54.

[0050] The other end of the rotating shaft 54 ​​is rotatably connected to the inner wall of the support platform 1. Limit brackets 58 are fixed on the opposite inner walls of the support platform 1. Both limit brackets 58 are inserted into the double threaded rod 55, and both limit brackets 58 are rotatably connected to the double threaded rod 55.

[0051] A grinding component 6 is also provided between the two fixed rings 7, which can grind the pipe openings of the two pipes 4 to be welded flat. The grinding assembly 6 includes a U-shaped plate 41 with its open end facing downward and sliding horizontally. The U-shaped plate 41 is also vertically raised and lowered. Grinding wheels 31 are provided on the opposite outer walls of the U-shaped plate 41 and rotate along the horizontal line. When the U-shaped plate 41 is lowered to the lowest position, both grinding wheels 31 are coaxial with the fixed ring 7. When the moving plate 2 slides towards each other until the pipe openings of the two pipes 4 are in contact with the two grinding wheels 31, the grinding wheels 31 grind the pipe openings of the pipes 4.

[0052] Inside the U-shaped plate 41, two vertically arranged rotating rods 32 are rotatably mounted along a horizontal line. The two ends of the two rotating rods 32 are rotatably connected to the opposite inner walls of the U-shaped plate 41. The two ends of the lower rotating rod 32 pass through the U-shaped plate 41 and are fixedly connected to the two grinding wheels 31. A drive wheel 42 and a driven wheel 45 are respectively fixedly mounted on the two rotating rods 32. The drive wheel 42 is connected to the driven wheel 45 through a transmission belt 44.

[0053] A control motor 43 is fixedly installed on the outer wall of the U-shaped plate 41. The output end of the control motor 43 passes through the U-shaped plate 41 and is fixedly connected to the rotating rod 32 above.

[0054] A horizontally sliding bracket 37 is provided above the two fixed rings 7. A vertically positioned lifting plate 38 is fixed to the top of the U-shaped plate 41. The top of the lifting plate 38 extends upward through the sliding bracket 37 and is vertically slidably connected to the sliding bracket 37.

[0055] A transition plate 36 is fixedly connected to the top of the lifting plate 38, and fixed brackets 40 are fixedly connected to the opposite side walls of the sliding bracket 37. Vertical telescopic cylinders 39 are fixedly installed on the fixed brackets 40, and the telescopic ends of the two telescopic cylinders 39 are fixedly connected to the transition plate 36.

[0056] One of the fixed plates 8 has a limiting plate 35 fixedly attached to its top. The end of the sliding bracket 37 is fixedly provided with two horizontally arranged sliding rods 34. One end of each sliding rod 34 passes through the limiting plate 35 and is slidably connected to the limiting plate 35. The same pull plate 33 is fixedly attached to the same end of the two sliding rods 34.

[0057] T-shaped sliding plates are fixed to the opposite side walls of the lifting plate 38, and T-shaped sliding grooves that cooperate with the T-shaped sliding plates are provided on the opposite inner walls of the sliding bracket 37.

[0058] Two horizontally arranged connecting rods 63 are fixedly attached to the outer walls of the two movable plates 2. When connecting pipes 4 that exceed the length of the movable plates 2, the movable plates 2 of the corresponding length are inserted into the connecting rods 63.

[0059] The working principle of this device is as follows: When fixing the pipe 4, pull one side of the rotating plate 50 outward. The rotating plate 50 and the support plate 47 slide horizontally until the distance between the fixing plate 8 and the support circular plate 24 is greater than the length of the pipe 4. Insert one end of the pipe 4 into the fixing ring 7, pull the rotating plate 50 inward, and insert the top plate 25 into the pipe 4. The first drive motor 22 drives the drive gear 10, the internal gear ring 16, and several driven gears 12 to rotate, thereby driving several driven racks 15, several sliding plates 11, and several positioning pins 9 to slide towards each other until several positioning pins 9 abut against the outer wall of the pipe 4. At the same time, the second drive motor 28 drives the single-tooth screw 30 to rotate, thereby driving the moving circular plate 27 and several sliding arc plates 26 to move closer to the support. As the circular plate 24 slides in the direction of the swing plate 29, several top plates 25 slide outward synchronously along the radial direction of the supporting circular plate 24 until the arc-shaped ends of several top plates 25 abut against the inner wall of the pipe 4. At this time, the pipe 4 is completely fixed, and both ends of the pipe 4 are coaxial with the fixing ring 7. Similarly, the above operation can be repeated to fix another pipe 4. After the fixation is completed, the two pipes 4 are in a coaxial state, realizing the function of quickly fixing and adjusting the two pipes 4 to a coaxial state. This not only simplifies the fixing process of the pipe 4, but also improves the coaxiality of the two pipes 4. Similarly, the above fixing operation of the pipe 4 can also be repeated to fix pipes 4 of different specifications in a coaxial manner, improving the practicality of the device. When grinding the openings of the two pipes 4, the two telescopic cylinders 39 shorten and drive the transition plate 36 to descend, which in turn drives the lifting plate 38, U-shaped plate 41, and two grinding wheels 31 to descend until the two telescopic cylinders 39 are fully retracted. At this time, the two grinding wheels 31 are coaxial with the openings of the two pipes 4. The control motor 43 drives the upper rotating rod 32 to rotate, which in turn drives the drive wheel 42, transmission belt 44, driven wheel 45, and lower rotating rod 32 to rotate, thereby driving the two grinding wheels 31 to rotate. At this time, the built-in motor 60 drives the rotating shaft 54, lower transmission gear 59, upper transmission gear 57, and double threaded screw 55 to rotate, thereby driving the two... The two moving plates 2 slide towards each other. When the opening of one of the pipes 4 contacts the grinding wheel 31, the two moving plates 2 continue to slide towards each other, thereby driving the grinding wheel 31 to slide horizontally until the opening of the other pipe 4 contacts the grinding wheel 31. The two grinding wheels 31 grind the openings of the two pipes 4. After the openings are ground flat, the telescopic cylinder 39 extends and drives the grinding wheel 31 to rise until the grinding wheel 31 returns to its original position. At this time, the built-in motor 60 rotates and drives the two moving plates 2 to slide towards each other until the openings of the two pipes 4 abut together. The openings of the two pipes 4 fit together tightly, improving the docking effect of the two pipes 4 and thus improving the welding quality of the pipes 4. When welding the two pipes 4, the third drive motor 61 drives the control gear 17 and one of the transition gears 18 to rotate. Under the transmission of the driven shaft 62 and the lower rotating tube 64, the other transition gear 18 rotates synchronously. The two transition gears 18 drive the two external gear rings 19 to rotate, which in turn drives the two upper rotating tubes 13 and the two rotating rings 14 to rotate. Under the clamping of the positioning column 9, the two clamped pipes 4 rotate synchronously. At the same time, the two support circular plates 24 rotate with the cooperation of the two rotating rods 49. The operator can perform complete welding at the joint of the two pipes 4 from one side of the device, which improves the welding efficiency of the pipes 4 and reduces the labor intensity of the operator. After the pipe 4 is welded, the second drive motor 28 rotates in the opposite direction, the top plate 25 separates from the pipe 4, and pulls the rotating plates 50 on both sides outward. The rotating plates 50 and the support plate 47 slide horizontally until the support circular plate 24 slides outside the pipe 4. One of the insert rods 52 is pulled upward, and the rotating plate 50 is rotated to insert the insert rod 52 into the other slot 46. The first drive motor 22 rotates in the opposite direction, the positioning column 9 separates from the pipe 4, and the welded pipe 4 is pulled out of the device.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A pipe connection device for water conservancy projects, characterized in that: The system includes a support platform (1), on which two movable plates (2) are horizontally arranged to slide synchronously or relative to each other. The top of the two movable plates (2) is provided with a clamping mechanism (5). The clamping mechanism (5) includes a horizontally arranged fixed ring (7). A number of sliding plates (11) are evenly distributed along the circumference of one end of the fixed ring (7). The number of sliding plates (11) slide synchronously relative to each other or relative to each other along the radial direction of the fixed ring (7). A horizontally arranged positioning column (9) is fixed at one end of each of the sliding plates (11) located inside the fixed ring (7). During the synchronous sliding of the number of positioning columns (9) relative to each other, the circle tangent to the outer wall of the number of positioning columns (9) is always coaxial with the fixed ring (7). The two fixed rings (7) are coaxially arranged, and each of the fixed rings (7) is provided with a tail centering component (3) on one side. The two fixed rings (7) are located between the two tail centering components (3). Each of the two fixed rings (7) is coaxially fitted with a rotating ring (14) that is fixedly connected to it, and the two rotating rings (14) are synchronously rotated along the axis of the fixed rings (7). The other end of the fixed ring (7) is provided with a number of fixed connecting plates (20) evenly distributed around its circumference. The number of connecting plates (20) is the same as that of the sliding plates (11). One end of each of the connecting plates (20) extends outward from the fixed ring (7) and is fixedly connected to the rotating ring (14). The end of each connecting plate (20) is provided with a driven gear (12) that rotates along the horizontal line. The end of each sliding plate (11) is fixedly provided with a driven rack (15) that meshes with the driven gear (12). An internal gear ring (16) is rotatably provided on the inner wall of the rotating ring (14) and is coaxially arranged therewith. Several driven gears (12) mesh with the internal gear ring (16). The top of each movable plate (2) is fixedly provided with a vertically arranged fixed plate (8). The ends of each fixed plate (8) are provided with a circular groove (56) coaxially arranged with the fixed ring (7). The circular groove (56) is provided with an upper rotating tube (13) rotatably connected to the inner wall of the fixed plate (8). One end of the upper rotating tube (13) extends to the outside of the fixed plate (8) and is coaxially fixed with the rotating ring (14). The other end of the upper rotating tube (13) extends to the outside of the fixed plate (8) and is fixedly fitted with an external toothed ring (19) coaxially arranged therewith. The opposite ends of the two fixed plates (8) are rotatably provided with transition gears (18) that mesh with the external toothed ring (19). The two fixed plates (8) are respectively provided with a lower rotating tube (64) and a driven shaft (62) that are rotatably arranged along the horizontal line at their opposite ends. One end of the driven shaft (62) extends into the lower rotating tube (64) and is slidably connected to the lower rotating tube (64). The other end of the driven shaft (62) passes through the fixed plate (8) and is fixedly connected to the transition gear (18). One end of the lower rotating tube (64) passes through the other fixed plate (8) and the transition gear (18) respectively and is fixedly connected to the transition gear (18). One of the fixed plates (8) has a control gear (17) that meshes with a transition gear (18) at one end, and a third drive motor (61) is fixedly mounted at one end of the fixed plate (8). The output end of the third drive motor (61) passes through the fixed plate (8) and is fixedly connected to the control gear (17).

2. The water conservancy project pipeline connection device according to claim 1, characterized in that: The tail centering component (3) includes a horizontally sliding rotating plate (50), which is also rotatable along a vertical line. At one end of the rotating plate (50) near the fixed ring (7), there is a supporting circular plate (24) coaxially arranged with the fixed ring (7). Several horizontally arranged top plates (25) are evenly distributed along the circumference of the end of the supporting circular plate (24). These top plates (25) are also synchronously or relatively sliding towards each other along the radial direction of the supporting circular plate (24). The outer walls of several top plates (25) are all arc-shaped structures. During the process of several top plates (25) sliding synchronously towards each other or relative to each other, the circle that is tangent to the arc end of several top plates (25) is always coaxial with the supporting circular plate (24).

3. A water conservancy engineering pipeline connection device according to claim 2, characterized in that: The two supporting circular plates (24) are rotatably connected to the two rotating plates (50).

4. A water conservancy project pipeline connection device according to claim 2, characterized in that: The end of the supporting circular plate (24) is coaxially fixed to a fixed shaft (23). A number of horizontally sliding arc plates (26) are evenly distributed along the circumference of the outer wall of the fixed shaft (23). The number of the sliding arc plates (26) is the same as the number of the top plates (25). A number of swing plates (29) are hinged to the outer wall of each sliding arc plate (26). The swing plates (29) on the sliding arc plates (26) are hinged to the top plates (25) respectively.

5. A water conservancy engineering pipeline connection device according to claim 4, characterized in that: The top of each movable plate (2) is provided with a horizontally sliding support plate (47), and the top of the support plate (47) is fixed with a vertically arranged fixing rod (48). The fixing rod (48) is inserted into the rotating plate (50) and is rotatably connected to the rotating plate (50).

6. A water conservancy project pipeline connection device according to claim 1, characterized in that: The top of the support platform (1) is provided with a double-threaded screw (55) that rotates along the horizontal line. The two ends of the double-threaded screw (55) extend into the two movable plates (2) respectively and are threadedly connected to the two movable plates (2).

7. A water conservancy engineering pipeline connection device according to claim 1, characterized in that: A grinding assembly (6) is also provided between the two fixed rings (7). The grinding assembly (6) includes a U-shaped plate (41) with its open end facing downward and sliding horizontally. The U-shaped plate (41) is also vertically raised and lowered. A grinding wheel (31) is provided on the opposite outer wall of the U-shaped plate (41) and rotates along the horizontal line.

8. A water conservancy project pipeline connection device according to claim 7, characterized in that: A horizontally sliding bracket (37) is provided above the two fixed rings (7), and a vertically arranged lifting plate (38) is fixed on the top of the U-shaped plate (41). The top of the lifting plate (38) extends upward through the sliding bracket (37) and is vertically slidably connected to the sliding bracket (37).

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