Auxiliary device for flange assembly

Abstract

The invention relates to the technical field of flange assembly, and discloses an auxiliary device for flange assembly, which comprises a mounting rod and a three-way pipe, a second piston rod is mounted on one side of a second piston, a supporting rod is fixedly connected to one end of the second piston rod, the supporting rod is arranged in a mounting hole, and a mounting seat is fixedly connected to the surface of the mounting rod. A plurality of first air cylinders are uniformly arranged on the surface of the mounting base and located in the three-way pipe, first pistons are slidably connected into the first air cylinders, the purpose of pushing second pistons to slide in the second air cylinders is achieved by increasing air pressure, then second piston rods and supporting rods are driven to move, and therefore the purpose of clamping and fixing a flange plate is achieved; the mounting rod is placed in the three-way pipe, the tension of the third spring is overcome along with continuous increase of air pressure, the first piston is pushed to drive the first piston rod to move, and the purpose of centering and positioning the mounting rod in the three-way pipe is achieved.

Description

Technical Field

[0001] This invention relates to the field of flange assembly technology, specifically to an auxiliary device for flange assembly. Background Technology

[0002] A flange, also called a flange plate or flange, is a component used to connect shafts, connecting pipe ends; flanges are also used on equipment inlets and outlets to connect two pieces of equipment. As a core component in mechanical engineering that enables detachable connections of pipelines, equipment, and components, flanges are widely used in industries such as petrochemicals, water conservancy and hydropower, municipal pipelines, and aerospace. Their assembly quality directly affects the sealing performance, stability, and service life of the connection structure.

[0003] Currently, when assembling and welding flanges and tee pipes, traditional assembly methods, especially for small- and medium-diameter flanges or in on-site construction scenarios, often rely heavily on manual labor. Multiple operators are required to support the flange, visually inspect its alignment with the tee pipe, and adjust its position using pry bars and hammers. This makes it difficult to precisely control the flange's coaxiality and end-face parallelism, thus affecting assembly and welding efficiency. Summary of the Invention

[0004] This invention provides an auxiliary device for flange assembly, which aims to position and clamp the tee pipe and the flange, facilitating the adjustment of the parallelism and gap between the end faces of the flange and the tee pipe, and improving the assembly and welding efficiency between them. It solves the problem mentioned in the background art that the traditional assembly method relies heavily on manual cooperation, requiring multiple operators to support the flange, visually observe whether the flange is aligned with the tee pipe, and correct the position by prying with pry bars, hammering, etc., making it difficult to accurately control the coaxiality and parallelism of the flange, thus affecting the assembly and welding efficiency.

[0005] This invention provides the following technical solution: an auxiliary device for flange assembly, comprising an installation rod and a tee pipe. The installation rod is disposed inside the tee pipe, and a fixing seat is installed on the surface of the installation rod above the tee pipe. A second cylinder is symmetrically arranged on the top of the fixing seat, and a second piston is slidably connected inside the second cylinder. A second piston rod is installed on one side of the second piston, and a support rod is fixedly connected to one end of the second piston rod. A flange is disposed above the tee pipe, and a plurality of installation holes are opened on the surface of the flange. The support rod is disposed inside the installation holes, and an installation seat is fixedly connected to the surface of the installation rod. A plurality of first cylinders are evenly arranged on the surface of the installation seat inside the tee pipe, and a first piston is slidably connected inside the first cylinder. A first piston rod is fixedly connected to one side of the first piston, and a positioning pressure block is fixedly connected to one end of the first piston rod.

[0006] As an optional embodiment of the flange assembly auxiliary device of the present invention, the positioning block is arc-shaped and has an anti-slip pad on the side away from the first cylinder. The mounting rod has an air supply channel inside that coincides with the axis of the mounting rod. The air supply channel is connected to both the second cylinder and the first cylinder through a connecting channel. The surface of the mounting rod is provided with an air inlet pipe that communicates with the air supply channel.

[0007] As an optional embodiment of the flange assembly auxiliary device of the present invention, a third spring is installed inside the first cylinder, one end of the third spring is fixedly connected to one side of the first piston, and the other end is fixedly connected to the end of the first cylinder near the connecting channel.

[0008] As an optional embodiment of the flange assembly auxiliary device of the present invention, wherein: a rotating seat is rotatably connected to the surface of the mounting rod, a limiting block is symmetrically arranged on the surface of the rotating seat, a limiting plate is rotatably connected to one side of the limiting block, and a limiting groove is formed on the side of the limiting plate near the tee pipe.

[0009] As an optional embodiment of the flange assembly auxiliary device of the present invention, wherein: a driven gear is fixedly connected to the top of the rotating seat, a first spring is symmetrically arranged between the driven gear and the limiting plate, the limiting groove is arc-shaped, and the diameter of the limiting groove is the same as the inner diameter of the flange.

[0010] As an optional embodiment of the flange assembly auxiliary device of the present invention, wherein: a connecting rod is fixedly connected to the top of the limiting plate, a connecting block is fixedly connected to the top of the connecting rod, an mounting plate is fixedly connected to the surface of the mounting rod, a plurality of pressure sensors are evenly distributed at the bottom of the mounting plate, and a detection plate is elastically connected to the bottom of the pressure sensors.

[0011] As an optional embodiment of the flange assembly auxiliary device of the present invention, a plurality of the detection plates are connected end to end in a ring arrangement, the connecting block is slidably connected to the detection plates, and the diameter of the connecting block is the same as the radial width of the detection plates.

[0012] As an optional embodiment of the flange assembly auxiliary device of the present invention, a motor is fixedly connected to the top of the mounting plate, and a drive gear is fixedly connected to the output shaft end of the motor, wherein the drive gear meshes with the driven gear.

[0013] As an optional embodiment of the flange assembly auxiliary device of the present invention, wherein: a third cylinder is symmetrically arranged on the surface of the rotating seat, a third piston is slidably connected inside the third cylinder, a third piston rod is fixedly connected to one end of the third piston, an insert block is fixedly connected to one end of the third piston rod, a locking plate is fixedly connected to the top of the limiting plate, and a slot corresponding to the insert block is provided on the locking plate.

[0014] As an optional embodiment of the flange assembly auxiliary device of the present invention, the mounting rod has an internal air pressure chamber communicating with the air supply channel, a sealing plate is slidably connected in the air pressure chamber, a pull rod is fixedly connected to one side of the sealing plate, one end of the pull rod is fixedly connected to a third piston, a second spring is fixedly connected between the sealing plate and the inner wall of the mounting rod, the locking plate is arc-shaped, and the slot is a through slot.

[0015] The present invention has the following beneficial effects:

[0016] 1. In this auxiliary device for flange assembly, a limiting plate is set to limit the flange and keep it perpendicular to the mounting rod. An air inlet pipe is provided, and by introducing gas into the air inlet pipe, the air pressure in the air supply channel and the connecting channel is increased. The increased air pressure pushes the second piston to slide in the second cylinder, thereby driving the second piston rod and the support rod to move, thus clamping and fixing the flange. The mounting rod is placed in the tee pipe. As the air pressure continues to increase, it overcomes the tension of the third spring and pushes the first piston to drive the first piston rod to move, thereby centering the mounting rod in the tee pipe.

[0017] 2. In this auxiliary device for flange assembly, a motor drives a drive gear to rotate. The rotation of the drive gear, in turn, drives a rotating seat to rotate. The rotation of the rotating seat then causes the limiting plate and limiting groove to rotate synchronously. During the rotation of the limiting plate and limiting groove, the surface roughness of the flange is detected. The limiting plate limits the flange, creating a gap between the flange and the top of the tee pipe for subsequent welding. The rotation of the limiting plate causes the connecting rod and connecting block to move synchronously. As the connecting block moves, it presses against the detection plate, transmitting pressure to a pressure sensor. The pressure sensor detects the pressure transmitted from the detection plate, thus enabling the detection of the flange's surface roughness. The detection plate reduces the number of pressure sensors required. By detecting the roughness of the flange top, defective flanges can be identified early, preventing rework due to post-assembly seal failure and improving assembly efficiency.

[0018] 3. This auxiliary device for flange assembly clamps and positions the mounting rod and flange by introducing gas into the inlet pipe. Maintaining pressure in the inlet pipe stabilizes the clamping and positioning of the mounting rod and flange. A second spring prevents the third piston from moving under pressure, ensuring stability of the third piston and its rod. This allows the insert block to be inserted into a slot in the locking plate, stabilizing the locking plate. Limiting the locking plate also stabilizes the limiting plate. The flange is positioned to ensure the parallelism of the end faces between the flange and the tee pipe and to leave a welding gap. By continuing to introduce gas into the air inlet pipe, the air pressure inside the mounting rod is gradually increased. This increase in air pressure overcomes the elastic force of the second spring, pushing the third piston away from the mounting rod. The push of the third piston drives the third piston rod and the insert block to move synchronously, thereby unlocking the insert block from the locking plate. This allows the limit plate to rotate along the limit block, facilitating the detection of the flange surface roughness. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the bottom of the mounting plate of the present invention.

[0021] Figure 3 This is a diagram of the mounting structure of the limiting plate of the present invention.

[0022] Figure 4 Cross-sectional view of the present invention Figure 1 .

[0023] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle.

[0024] Figure 6 Cross-sectional view of the present invention Figure 2 .

[0025] Figure 7 for Figure 6 Enlarged view of section B in the middle.

[0026] Figure 8 for Figure 6 Enlarged view of a section at point C.

[0027] In the diagram: 1. Mounting rod; 2. T-pipe; 3. Mounting seat; 4. First cylinder; 5. First piston; 6. First piston rod; 7. Positioning block; 8. Fixed seat; 9. Second cylinder; 10. Second piston; 11. Second piston rod; 12. Support rod; 13. Third spring; 14. Pull rod; 15. Sealing plate; 17. Rotating seat; 18. Limiting block; 19. Limiting plate; 20. Limiting groove; 21. Driven gear; 22. 23. First spring; 24. Mounting plate; 25. Motor; 26. Drive gear; 27. Connecting rod; 28. Connecting block; 29. ​​Pressure sensor; 20. Detection plate; 31. Third cylinder; 32. Third piston; 33. Third piston rod; 34. Insert block; 35. Locking plate; 36. Air pressure chamber; 37. Air inlet pipe; 38. Air delivery channel; 39. Connecting channel; 40. Second spring; 41. Flange; 42. Mounting hole. Detailed Implementation

[0028] 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.

[0029] Example 1, please refer to Figures 1 to 8 An auxiliary device for flange assembly includes a mounting rod 1 and a tee pipe 2. The mounting rod 1 is disposed inside the tee pipe 2. A fixing seat 8 is mounted on the surface of the mounting rod 1 above the tee pipe 2. A second cylinder 9 is symmetrically arranged on the top of the fixing seat 8. A second piston 10 is slidably connected inside the second cylinder 9. A second piston rod 11 is mounted on one side of the second piston 10. A support rod 12 is fixedly connected to one end of the second piston rod 11. A flange 41 is disposed above the tee pipe 2. A plurality of mounting holes 42 are opened on the surface of the flange 41. The support rod 12 is disposed inside the mounting holes 42. A mounting seat 3 is fixedly connected to the surface of the mounting rod 1. A plurality of first cylinders 4 are evenly arranged on the surface of the mounting seat 3 inside the tee pipe 2. A first piston 5 is slidably connected inside the first cylinder 4. A first piston rod 6 is fixedly connected to one side of the first piston 5. A positioning pressure block 7 is fixedly connected to one end of the first piston rod 6.

[0030] The positioning block 7 is arc-shaped, and the side of the positioning block 7 away from the first cylinder 4 is provided with an anti-slip pad. The mounting rod 1 has an air supply channel 38 that coincides with the axis of the mounting rod 1. The air supply channel 38 is connected to the second cylinder 9 and the first cylinder 4 through a connecting channel 39. The surface of the mounting rod 1 is provided with an air intake pipe 37 that communicates with the air supply channel 38.

[0031] A third spring 13 is installed inside the first cylinder 4. One end of the third spring 13 is fixedly connected to one side of the first piston 5, and the other end is fixedly connected to the end of the first cylinder 4 near the connecting channel 39.

[0032] When assembling and welding between the flange and tee pipe 2, refer to Figure 1 - Figure 4 The support rod 12 is inserted into the mounting hole 42 of the flange 41, so that the flange 41 is in contact with the bottom of the limiting plate 19. By setting the limiting plate 19, the flange 41 is limited. By introducing gas into the air inlet pipe 37, the air pressure in the air supply channel 38 and the connecting channel 39 inside the mounting rod 1 is increased. The increase in air pressure pushes the second piston 10 to slide in the second cylinder 9. The movement of the second piston 10 drives the second piston rod 11 and the support rod 12 to move, thereby clamping and fixing the flange 41.

[0033] After clamping the flange 41, insert the mounting rod 1 into the tee pipe 2. Under the limiting action of the limiting plate 19, a welding gap of 8-10mm is left between the top of the flange 41 and the top of the tee pipe 2 to facilitate welding operations and ensure the sealing effect between the flange 41 and the tee pipe 2. After leaving the welding gap, continue to introduce gas into the air inlet pipe 37. The gas pressure continues to increase, overcoming the pulling force of the third spring 13 on the first piston 5, pushing the first piston 5 to move the first piston rod 6, thus pushing the positioning block 7 towards the inner wall of the tee pipe 2 until the positioning block 7 fits against the inner wall of the tee pipe 2, thereby centering the mounting rod 1 inside the tee pipe 2, making the flange 41 coincide with the axis of the tee pipe 2, and ensuring that the gap between the flange 41 and the tee pipe 2 is consistent. Then, spot weld the connection between the flange 41 and the tee pipe 2. After spot welding, turn off the gas source, remove the mounting rod 1 as a whole from the tee pipe 2, and perform circumferential welding on the connection between the flange 41 and the tee pipe 2 to complete the assembly of the flange 41.

[0034] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 8 The mounting rod 1 is rotatably connected to a rotating seat 17. The rotating seat 17 is symmetrically provided with limit blocks 18. One side of the limit block 18 is rotatably connected to a limit plate 19. The limit plate 19 has a limit groove 20 on the side near the tee pipe 2.

[0035] A driven gear 21 is fixedly connected to the top of the rotating seat 17. A first spring 22 is symmetrically arranged between the driven gear 21 and the limiting plate 19. The limiting groove 20 is arc-shaped and the diameter of the limiting groove 20 is the same as the inner diameter of the flange 41.

[0036] A connecting rod 26 is fixedly connected to the top of the limiting plate 19, a connecting block 27 is fixedly connected to the top of the connecting rod 26, an mounting plate 23 is fixedly connected to the surface of the mounting rod 1, a number of pressure sensors 28 are evenly distributed at the bottom of the mounting plate 23, and a detection plate 29 is elastically connected to the bottom of the pressure sensor 28.

[0037] Several detection plates 29 are connected end to end in a ring, and a connecting block 27 is slidably connected to the detection plates 29. The diameter of the connecting block 27 is the same as the radial width of the detection plates 29.

[0038] To ensure the sealing effect of flange 41, refer to... Figure 2 - Figure 3 After clamping the flange 41, the motor 24 is started. The motor 24 drives the drive gear 25 to rotate. The rotation of the drive gear 25 drives the driven gear 21 to rotate the rotating seat 17. The rotation of the rotating seat 17 drives the limiting plate 19 and the limiting groove 20 to rotate synchronously. When the limiting groove 20 rotates, if it encounters unevenness on the top of the flange 41, it drives the limiting plate 19 to rotate around the limiting block 18. The rotation of the limiting plate 19 drives the connecting rod 26 and the connecting block 27 to move synchronously. When the connecting block 27 moves, it squeezes the detection plate 29. The squeezing of the detection plate 29 transmits the pressure to the pressure sensor 28. The pressure sensor 28 is used to detect the pressure transmitted by the detection plate 29, thereby detecting the surface roughness of the flange 41.

[0039] By setting up the detection plate 29, the number of pressure sensors 28 can be reduced, thus lowering costs. The connecting block 27 rotates with the rotating seat 17, achieving the purpose of comprehensive inspection of the top of the flange 41. By inspecting the roughness of the top of the flange 41, defective flanges can be identified in advance, avoiding rework due to seal failure discovered after assembly, and improving assembly efficiency.

[0040] Example 3 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 8 A motor 24 is fixedly connected to the top of the mounting plate 23, and a drive gear 25 is fixedly connected to the output shaft end of the motor 24. The drive gear 25 meshes with the driven gear 21.

[0041] A third cylinder 30 is symmetrically arranged on the surface of the rotating seat 17. A third piston 31 is slidably connected inside the third cylinder 30. A third piston rod 32 is fixedly connected to one end of the third piston 31. An insert block 34 is fixedly connected to one end of the third piston rod 32. A locking plate 35 is fixedly connected to the top of the limiting plate 19. A slot corresponding to the insert block 34 is opened on the locking plate 35.

[0042] The mounting rod 1 has a pressure chamber 36 that communicates with the air supply channel 38. A sealing plate 15 is slidably connected inside the pressure chamber 36. A pull rod 14 is fixedly connected to one side of the sealing plate 15. One end of the pull rod 14 is fixedly connected to the third piston 31. A second spring 40 is fixedly connected between the sealing plate 15 and the inner wall of the mounting rod 1. The locking plate 35 is arc-shaped, and the slot is a through slot.

[0043] To further improve the positioning of flange 41 and the detection effect of the roughness of the top of flange 41, refer to Figure 6 - Figure 8 By introducing gas into the intake pipe 37, the mounting rod 1 and flange 41 are clamped and positioned. After clamping and positioning the mounting rod 1 and flange 41, the gas in the intake pipe 37 is pressurized to keep the clamping and positioning of the mounting rod 1 and flange 41 stable. A second spring 40 is provided. When the pressure is maintained, the gas pressure cannot overcome the tension of the second spring 40 to move the third piston 31. At this time, under the action of the second spring 40, the third piston 31 and the third piston rod 32 remain stable. At this time, the insert block 34 is inserted into the slot in the locking plate 35 to keep the locking plate 35 stable. By limiting the locking plate 35, the limiting plate 19 is kept stable, which facilitates the positioning of the flange 41, ensures the parallelism of the end faces and the weld gap between the flange 41 and the tee pipe 2, and facilitates the assembly of the flange 41.

[0044] When the roughness of flange 41 needs to be tested, gas continues to be introduced into the air inlet pipe 37. At this time, the air pressure gradually increases, overcoming the elastic force of the second spring 40, and pushing the sealing plate 15 into the air pressure chamber 36. This pushes the third piston 31 away from the mounting rod 1. Through the pushing of the third piston 31, the third piston rod 32 and the insert block 34 move synchronously, thereby allowing the insert block 34 to pass through the slot on the locking plate 35, thus releasing the lock. This allows the limiting plate 19 to rotate along the limiting block 18, avoiding the problem that the limiting plate 19 cannot move up and down when testing the roughness of flange 41, which would prevent the pressure sensor 28 from detecting pressure and roughness.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An auxiliary device for flange assembly comprising a mounting rod (1) and a tee (2), characterized in that: The mounting rod (1) is arranged in the tee pipe (2), a fixed seat (8) is arranged on the surface of the mounting rod (1) above the tee pipe (2), a second air cylinder (9) is symmetrically arranged on the top of the fixed seat (8), a second piston (10) is slidably connected in the second air cylinder (9), a second piston rod (11) is arranged on one side of the second piston (10), a supporting rod (12) is fixedly connected to one end of the second piston rod (11), a flange plate (41) is arranged above the tee pipe (2), a plurality of mounting holes (42) are formed in the surface of the flange plate (41), the supporting rod (12) is arranged in the mounting hole (42), a mounting seat (3) is fixedly connected to the surface of the mounting rod (1), a plurality of first air cylinders (4) are evenly arranged in the tee pipe (2) on the surface of the mounting seat (3), a first piston (5) is slidably connected in the first air cylinder (4), a first piston rod (6) is fixedly connected to one side of the first piston (5), and a positioning pressing block (7) is fixedly connected to one end of the first piston rod (6).

2. A device for assisting in the assembly of flanges according to claim 1, characterized in that: The positioning pressing block (7) is arranged in an arc shape, and an anti-skid pad is arranged on the side, away from the first air cylinder (4), of the positioning pressing block (7), a gas conveying channel (38) coinciding with the axis of the mounting rod (1) is formed in the mounting rod (1), the gas conveying channel (38) is communicated with the second air cylinder (9) and the first air cylinder (4) through a communication channel (39), and an air inlet pipe (37) is arranged on the surface of the mounting rod (1) and communicated with the gas conveying channel (38).

3. A device for assisting in the assembly of flanges according to claim 2, characterised in that: A third spring (13) is arranged in the first air cylinder (4), one end of the third spring (13) is fixedly connected to one side of the first piston (5), and the other end of the third spring (13) is fixedly connected to the first air cylinder (4) near the one end of the communication channel (39).

4. The auxiliary device for assembling flange according to claim 1, characterized in that: A rotating seat (17) is rotatably connected to the surface of the mounting rod (1), limit blocks (18) are symmetrically arranged on the surface of the rotating seat (17), limit plates (19) are rotatably connected to one side of the limit blocks (18), and limit grooves (20) are formed in the side, close to the tee pipe (2), of the limit plates (19).

5. A device for assisting in the assembly of flanges according to claim 4, characterised in that: A driven gear (21) is fixedly connected to the top of the rotating seat (17), first springs (22) are symmetrically arranged between the driven gear (21) and the limit plates (19), and the limit grooves (20) are arranged in an arc shape and have the same diameter as the inner diameter of the flange plate (41).

6. A device for assisting in the assembly of flanges according to claim 5, characterised in that: A connecting rod (26) is fixedly connected to the top of the limit plate (19), a connecting block (27) is fixedly connected to the top of the connecting rod (26), a mounting plate (23) is fixedly connected to the surface of the mounting rod (1), a plurality of pressure sensors (28) are evenly distributed on the bottom of the mounting plate (23), and detection plates (29) are elastically connected to the bottom of the pressure sensors (28).

7. A device according to claim 6, wherein: The detection plates (29) are arranged in a ring shape with the first ends connected to the second ends, the connecting block (27) is slidably connected between the connecting block (27) and the detection plates (29), and the diameter of the connecting block (27) is the same as the radial width of the detection plates (29).

8. The auxiliary device for assembling flange according to claim 6, characterized in that: The top of the mounting plate (23) is fixedly connected with a motor (24), the output shaft end of the motor (24) is fixedly connected with a driving gear (25), and the driving gear (25) is engaged with the driven gear (21).

9. The auxiliary device for assembling flange according to claim 8, characterized in that: The surface of the rotating seat (17) is symmetrically provided with a third cylinder (30), the third cylinder (30) is slidably connected with a third piston (31), one end of the third piston (31) is fixedly connected with a third piston rod (32), one end of the third piston rod (32) is fixedly connected with an insertion block (34), the top of the limiting plate (19) is fixedly connected with a locking plate (35), and the locking plate (35) is provided with a clamping groove corresponding to the insertion block (34).

10. The auxiliary device for assembling flange according to claim 9, characterized in that: The inside of the mounting rod (1) is provided with a gas pressure cavity (36) communicated with the gas conveying channel, the gas pressure cavity (36) is slidably connected with a sealing plate (15), one side of the sealing plate (15) is fixedly connected with a pull rod (14), one end of the pull rod (14) is fixedly connected with the third piston (31), the sealing plate (15) and the inner wall of the mounting rod (1) are fixedly connected with a second spring (40), the locking plate (35) is arc-shaped, and the clamping groove is a through groove.

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