A mechanical device for quick connection of pipe flanges

Abstract

The present invention discloses a mechanical device for quick connection of pipe flanges, comprising a connecting pipe, a pressure plate pipe, a tensioning mechanism, a cam mechanism, and a locking mechanism. The pressure plate pipe is sleeved on the connecting pipe; the tensioning mechanism comprises a plurality of pull rods evenly distributed in the circumferential direction of the pressure plate pipe, the pull rods being able to freely move along the axial direction of the pressure plate pipe, and the connected flanges mounted on their ends being freely moved to the sealing disk by the pull rods; the cam mechanism is rotatably connected to the pressure plate pipe and is used to drive the tensioning mechanism; and the locking mechanism is used to lock the axially movable position of the pull rods. The present application transforms the traditional flange bolt connection into a tensioning connection between flanges through a mechanical mechanism, transforming the original pre-tightening that required tightening bolts one by one into an integrated tightening operation, greatly improving the working efficiency. At the same time, the mechanical device of the present application does not require any other tools to operate, simplifying the flange connection steps and reducing the working intensity of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline flange connection, and in particular to a mechanical device for quick connection of pipeline flanges. Background Art

[0002] Flanges are common components in hydraulic systems and are currently primarily connected using hexagonal bolts and nuts. While this connection method is reliable, it is labor-intensive, requires a long installation cycle, and requires complex procedures. Traditional bolted connections are particularly inefficient in applications where frequent flange replacement is required, such as screw pump testing. The existing technology lacks a flange quick-connect device that simplifies operation and improves efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a mechanical device for quick connection of pipeline flanges, so as to solve the problems of high labor intensity and low efficiency of traditional bolt connection methods.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A mechanical device for quick connection of pipe flanges, comprising:

[0006] A connecting pipe, one end of which is a flange disc structure, and a sealing disc is provided on the flange disc structure;

[0007] A compression coil pipe is sleeved on the connecting pipe and can freely rotate and / or move along the connecting pipe. A clamp assembly is provided on one end of the compression coil pipe away from the sealing disk for maintaining its sleeve position fixed;

[0008] The tensioning mechanism includes a plurality of tie rods evenly distributed in the circumferential direction of the pressure coil tube, the tie rods being able to freely move along the axial direction of the pressure coil tube, and the connected flanges mounted at their ends being freely moved to the sealing disk through the tie rods;

[0009] The cam mechanism is rotatably connected to the pressure plate tube and is used to drive the tensioning mechanism.

[0010] As a further solution of the present invention, a locking mechanism is also included, and the locking mechanism is used to lock the position of the pull rod that is free to move axially.

[0011] As a further solution of the present invention: the locking mechanism includes a rotating disk that can rotate freely along the radial direction of the pressure plate tube. When the rotating disk rotates, the upper wedge block elastically connected by the limiting compression spring rotates synchronously, and the lower wedge block is fixedly connected to the pressure plate tube. There are inclined surfaces between the upper wedge block and the lower wedge block that guide and contact each other, so that the upper wedge block moves to a height position that contacts the locking railing.

[0012] As a further solution of the present invention: the locking mechanism also includes a pawl and a pawl positioning block, the pawl positioning block is fixedly connected to the outer wall of the pressure plate tube and is rotatably connected to the pawl, and the pawl cooperates with the arc-shaped rack on the outer wall of the rotating disk to lock the rotation position of the rotating disk.

[0013] As a further solution of the present invention: the locking mechanism further includes a rotating disk handle and a pressure plate, the rotating disk handle is arranged on the outer wall of the rotating disk, and the rotating disk is limitedly arranged in the gap between the pressure plate and the pressure disk tube.

[0014] As a further solution of the present invention: the tensioning mechanism includes a cam top plate that can move freely along the axial direction of the pressure plate tube, the cam top plate and the pull rod are guided and connected, and an elastic connection is formed by a butterfly spring sleeved on the end of the pull rod.

[0015] As a further solution of the present invention: the tensioning mechanism further includes a plurality of reset springs, and the two ends of the reset springs are respectively connected to the pressure plate tube and the cam top plate.

[0016] As a further solution of the present invention: the cam mechanism includes a cam block rotatably connected to the pressure plate tube, the cam block is used to resist the cam top block on the cam top plate surface, the end of the cam block away from the pressure plate tube is connected through a cam connecting plate bridge frame, and a cam handle is provided on the top surface of the cam connecting plate.

[0017] As a further solution of the present invention: the cam mechanism also includes a limiting rack and a rack block that are engaged and locked. One end of the limiting rack is rotatably connected to the bottom end surface of the cam connecting plate through a pin shaft, and the rack block is arranged in an open groove of the cam top plate.

[0018] As a further solution of the present invention: the clamp assembly includes an upper clamp and a lower clamp with elastic deformation. When the upper clamp and the lower clamp are tightened by bolts, they are used to clamp and lock the coiled pipe on the connecting pipe.

[0019] Beneficial effects of the present invention:

[0020] (1) The mechanical device of the present application is easy to be installed on the connecting pipe for operation, transforming the traditional flange bolt connection into a tightening connection between flanges through a mechanical mechanism, and transforming the pre-tightening that originally required tightening the bolts one by one into an integrated tightening operation, thereby greatly improving the working efficiency. At the same time, the mechanical device of the present application does not require any other tools to operate, simplifying the flange connection steps and reducing the working intensity of workers;

[0021] (2) This application cleverly combines the design of a cam mechanism and a tensioning mechanism to facilitate the conversion of complex multiple flange bolt connections into a single cam handle to push the flange connection, significantly improving efficiency;

[0022] (3) The present application adopts an ingenious locking mechanism structure design and utilizes the guiding connection function of the upper wedge and the lower wedge to lock the position of the pull rod, prevent it from axial movement, and ensure the reliability of the flange connection;

[0023] (4) The present application solves the problem that multiple pull rods cannot be tightened simultaneously due to uneven flange wall thickness by designing an elastic connection between the pull rod, the cam top plate and the butterfly spring, and adapts to the difference in flange wall thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 It is a side structural schematic diagram of the present invention;

[0026] Figure 2 is another lateral structural schematic diagram of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the cam mechanism of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the tensioning mechanism of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the locking mechanism of the present invention.

[0030] In the figure: 1. Connecting pipe; 2. Sealing plate; 3. Pressure plate tube; 4. Clamp assembly; 5. Cam top plate; 6. Cam top block; 7. Cam block; 8. Cam connecting plate; 9. Cam handle; 10. Limit rack; 11. Rack block; 12. Pin shaft; 13. Rack handle; 14. Pull rod; 15. Opening pad; 16. Butterfly spring; 17. Spring seat; 18. Limit plate; 19. Rotating plate; 20. Upper wedge block; 21. Lower wedge block; 22. Ratchet; 23. Ratchet positioning block; 24. Rotating plate handle; 25. Limit compression spring; 26. Reset tension spring; 27. Pressure plate; 28. Connected flange. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, the meaning of "multiple" and "several" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0033] Example 1

[0034] See also Figure 1 and Figure 2 As shown, the present invention is a mechanical device for quick connection of pipeline flanges, including a connecting pipe 1, a pressure plate tube 3, a tensioning mechanism and a cam mechanism. One end of the connecting pipe 1 is a flange disc structure, and a sealing disc 2 is provided on the flange disc structure; the pressure plate tube 3 is sleeved on the connecting pipe 1, and can rotate and / or move freely along the connecting pipe 1, and a clamp assembly 4 for keeping its sleeve position fixed is provided on the end of the pressure plate tube 3 away from the sealing disc 2; the tensioning mechanism includes a plurality of pull rods 14 evenly distributed in the circumferential direction of the pressure plate tube 3, the pull rods 14 can move freely along the axial direction of the pressure plate tube 3, and the connected flange 28 installed at its end is freely moved to the sealing disc 2 through the pull rods 14; the cam mechanism is rotatably connected to the pressure plate tube 3, and is used to drive the tensioning mechanism.

[0035] The mechanical device of the present application is convenient for being integrally mounted on the connecting pipe 1 for operation and use. The bolt mounting holes of the connected flange 28 are aligned with the pull rod 14, and the connected flange 28 is installed at the end of the pull rod 14, so as to facilitate pushing the connected flange 28 to the position of contacting the sealing disk 2. The operator rotates the cam mechanism to drive the tensioning mechanism to move the pressure plate tube 3 axially horizontally, so that the pull rod 14 on the tensioning mechanism can freely move along the axial direction of the pressure plate tube 3, so that the pull rod 14 drives the connected flange 28 to move onto the sealing disk 2, so as to form a sealed connection between the connected flange 28 and the flange disc structure on the connecting pipe 1, and the sealed connection is stable and reliable.

[0036] The mechanical device of the present application can transform traditional flange bolt connections into a tightening connection between flanges through a mechanical mechanism, transforming the original pre-tightening process that required tightening bolts one by one into an integrated tightening operation, greatly improving work efficiency. Furthermore, the mechanical device of the present application does not require any other tools to operate, simplifying the flange connection steps and reducing the workload of workers. Using the mechanical device of the present application can make connecting flanges simpler, more labor-saving, and more efficient.

[0037] In this example, it should be understood that the number and distribution of the pull rods 14 designed on the tensioning mechanism can be adjusted in a timely manner according to the size of the docking flange and the number of flange holes.

[0038] In this example, it should be understood that for applications where the stiffness requirements of the butt flange connection are not high, the mechanical device of the present application can achieve the butt flange tightening operation simply by driving the tightening mechanism through the cam mechanism.

[0039] In this example, see Figure 1 As shown, when the connected flange 28 is installed at the end of the pull rod 14, an L-shaped open gasket 15 can be used to connect the two pull rods 14. The end of the L-shaped open gasket 15 is snap-connected to the pull rod 14 to facilitate disassembly or assembly, and the L-shaped open gasket 15 is in conflict with the plate surface of the connected flange 28, so that the pull rod 14 drives the connected flange 28 to be tightened and docked in place.

[0040] In this embodiment, O-rings are provided on both the inner and outer sides of the sealing disk 2 to enhance the sealing between the tightening flanges.

[0041] Example 2

[0042] See also Figure 5 As shown, the mechanical device of the present application also includes a locking mechanism, which is used to lock the position of the pull rod 14 that is free to move axially; through the design of the locking mechanism, in application scenarios where the stiffness requirements of the docking flange are relatively high, the designed locking mechanism can lock the position of the pull rod 14 to prevent the pull rod 14 from moving axially, thereby ensuring the connection reliability between the docking flanges.

[0043] When the locking lever 14 is unlocked, the rotating disk 19 drives the upper wedge 20 away from the pull rod 14 through the limiting compression spring 25.

[0044] In this embodiment, the locking mechanism also includes a pawl 22 and a pawl positioning block 23. The pawl positioning block 23 is fixedly connected to the outer wall of the pressure plate tube 3 and is rotatably connected to the pawl 22. The pawl 22 cooperates with the arc-shaped rack on the outer wall of the rotating disk 19 to lock the rotation position of the rotating disk 19; after the rotating disk 19 rotates to the locking position of the pull rod 14, in order to ensure that the rotation position of the rotating disk 19 is constant, the operator rotates the pawl 22 on the pawl positioning block 23 up and down to achieve the engagement and locking or unlocking of the pawl 22 with the arc-shaped rack on the outer wall of the rotating disk 19, which is easy to operate.

[0045] In this embodiment, the locking mechanism also includes a rotating disk handle 24 and a pressure plate 27. The rotating disk handle 24 is arranged on the outer wall of the rotating disk 19, and the rotating disk 19 is limitedly set in the gap between the pressure plate 27 and the pressure disk tube 3; the rotating disk handle 24 is designed to facilitate the rotation of the rotating disk 19, and the rotating disk 19 is limitedly set between the pressure plate 27 and the pressure disk tube 3 to ensure that the rotating disk 19 rotates stably along the radial direction of the pressure disk tube 3; during the assembly process of the pressure plate 27, the pressure disk tube 3 and the rotating disk 19, the pressure plate 27 can be fixedly connected to the pressure disk tube 3 by bolts in the circumferential direction, and a bolt avoidance guide groove can be set on the rotating disk 19 to enable the rotating disk 19 to rotate and lock the pull rod 14.

[0046] Example 3

[0047] See also Figure 4 As shown, the tensioning mechanism includes a cam top plate 5 that can move freely axially along the pressure plate tube 3. The cam top plate 5 is guided and connected to the pull rod 14, and an elastic connection is formed by a butterfly spring 16 sleeved on the end of the pull rod 14. During the design and use of the tensioning mechanism, the cam top plate 5 can be driven by the cam mechanism to move freely axially along the pressure plate tube 3. When the cam top plate 5 moves axially, the cam top plate 5 compresses the butterfly spring 16, thereby elastically resisting the pull rod 14 to move axially synchronously, so that the pull rod 14 drives the connected flange 28 to dock into place.

[0048] In this embodiment, during the elastic connection and assembly process of the pull rod 14, the cam top plate 5 and the butterfly spring 16, the cam top plate 5 and the butterfly spring 16 are both mounted on the end of the pull rod 14 away from the connected flange 28, and a positioning block for limiting the cam top plate 5 is provided on the pull rod 14, and a spring seat 17 for limiting one end of the butterfly spring 16 is provided; the cam top plate 5 moves axially to squeeze the butterfly spring 16, and under the limiting action of the spring seat 17, the pull rod 14 moves axially synchronously; in addition, the elastic connection design of the pull rod 14, the cam top plate 5 and the butterfly spring 16 can solve the problem that multiple pull rods 14 cannot be tightened at the same time due to uneven flange wall thickness.

[0049] In this embodiment, the tensioning mechanism also includes multiple reset springs 26, the two ends of which are respectively connected to the pressure plate tube 3 and the cam top plate 5; during the process of the cam mechanism driving the cam top plate 5 to move axially, the designed reset spring 26 is used to maintain the close fit between the cam block 7 and the cam top block 6, thereby ensuring the driving stability of the cam mechanism.

[0050] In this embodiment, it is necessary to understand that when the cam top plate 5 is installed to move freely axially along the pressure plate tube 3, a guide groove can be provided on the circumferential outer wall of the pressure plate tube 3, and the cam top plate 5 is guided and connected along the guide groove through a protruding block so that the cam top plate 5 can move horizontally and linearly, thereby ensuring the horizontal and linear tensioning action of the pull rod 14.

[0051] Example 4

[0052] See also Figure 3 As shown, the cam mechanism includes a cam block 7 rotatably connected to the pressure plate tube 3, the cam block 7 is used to abut the cam top block 6 on the plate surface of the cam top plate 5, and the end of the cam block 7 away from the pressure plate tube 3 is connected through a cam connecting plate 8 bridge, and a cam handle 9 is provided on the top surface of the cam connecting plate 8; during the design and use of the cam mechanism, the cam block 7 is a non-isocircular structure, and the operator can easily hold the cam handle 9 to rotate the cam block 7 along the pressure plate tube 3. During the rotation of the cam block 7, it fits tightly against the cam top block 6 to make the cam top plate 5 move axially, so that the tensioning mechanism can tighten the connecting flange.

[0053] In this embodiment, the cam mechanism also includes a limit rack 10 and a rack block 11 that are engaged and locked. One end of the limit rack 10 is rotatably connected to the bottom end surface of the cam connecting plate 8 through a pin shaft 12, and the rack block 11 is arranged in the open groove of the cam top plate 5; after the cam mechanism drives the tensioning mechanism to reach the tensioning position of the docking flange, the engagement and locking connection between the limit rack 10 and the rack block 11 is used to lock the rotation angle position of the cam block 7 to ensure the stability of the mechanical device.

[0054] In this embodiment, one end of the limiting rack 10 is rotatably connected to the cam connecting plate 8, and the other end can be snap-connected to the limiting plate 18. The limiting plate 18 can be connected to the ends of the two pull rods 14 to maintain the stable engagement and locking between the limiting rack 10 and the rack block 11 to avoid falling off; in addition, a rack handle 13 can be designed on the limiting rack 10 to facilitate the operation of lifting the limiting rack 10.

[0055] In this embodiment, it should be understood that the cam mechanism can be designed as a hydraulic jacking mechanism, which uses a micro hydraulic cylinder to achieve horizontal movement of the pull rod 14.

[0056] Example 5

[0057] See also Figure 1As shown, the clamp assembly 4 includes an upper clamp and a lower clamp with elastic deformation. When the upper clamp and the lower clamp are tightened by bolts, they are used to clamp and lock the pressure plate tube 3 on the connecting pipe 1; the pressure plate tube 3 in this application is sleeved on the connecting pipe 1 for operation and has the function of free rotation and / or movement. When the pressure plate tube 3 is installed, it can be locked by the clamp assembly 4 to achieve a certain mechanical limiting effect on the free rotation and / or movement function of the pressure plate tube 3, so as to avoid interference and influence on the action of the tensioning mechanism, cam mechanism and locking mechanism.

[0058] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A mechanical device for quick connection of pipe flanges, characterized in that: include: A connecting pipe (1) having a flange disc structure at one end and a sealing disc (2) provided on the flange disc structure; A pressure coil pipe (3) is sleeved on the connecting pipe (1) and can freely rotate and / or move along the connecting pipe (1). A clamp assembly (4) for maintaining the sleeve position of the pressure coil pipe (3) is provided on one end of the pressure coil pipe (3) away from the sealing disc (2); The tensioning mechanism comprises a plurality of pull rods (14) uniformly distributed in the circumferential direction of the pressure coil tube (3), the pull rods (14) being freely movable along the axial direction of the pressure coil tube (3), and the connected flange (28) mounted at its end being freely movable to the sealing disk (2) through the pull rods (14); A cam mechanism is rotatably connected to the pressure plate tube (3) and is used to drive the tensioning mechanism; A locking mechanism is used to lock the position of the pull rod (14) that is free to move axially. The locking mechanism includes a rotating disk (19) that can rotate freely along the radial direction of the pressure plate tube (3). When the rotating disk (19) rotates, the upper wedge block (20) elastically connected by the limit compression spring (25) rotates synchronously. The lower wedge block (21) is fixedly connected to the pressure plate tube (3). There are inclined surfaces between the upper wedge block (20) and the lower wedge block (21) that guide and contact each other, so that the upper wedge block (20) moves to a height position that contacts the locking railing; The locking mechanism further comprises a pawl (22) and a pawl positioning block (23), wherein the pawl positioning block (23) is fixedly connected to the outer wall of the pressure coil tube (3) and is rotatably connected to the pawl (22), and the pawl (22) is locked in cooperation with the arc-shaped rack on the outer wall of the rotating disk (19) to achieve locking of the rotation position of the rotating disk (19).

2. A mechanical device for quick connection of pipe flanges according to claim 1, characterized in that: The locking mechanism further comprises a rotating disk handle (24) and a pressure plate (27), wherein the rotating disk handle (24) is arranged on the outer wall of the rotating disk (19), and the rotating disk (19) is limitedly arranged in the gap between the pressure plate (27) and the pressure disk tube (3).

3. A mechanical device for quick connection of pipe flanges according to claim 1, characterized in that: The tensioning mechanism comprises a cam top plate (5) that can freely move along the axial direction of the pressure coil tube (3), the cam top plate (5) is guided and connected to the pull rod (14), and an elastic connection is formed by a butterfly spring (16) sleeved on the end of the pull rod (14).

4. A mechanical device for quick connection of pipe flanges according to claim 3, characterized in that: The tensioning mechanism further comprises a plurality of reset springs (26), and the two ends of the reset springs (26) are respectively connected to the pressure coil tube (3) and the cam top plate (5).

5. A mechanical device for quick connection of pipe flanges according to claim 1, characterized in that: The cam mechanism comprises a cam block (7) rotatably connected to the pressure plate tube (3), the cam block (7) being used to abut against a cam top block (6) on the plate surface of the cam top plate (5), and the end of the cam block (7) away from the pressure plate tube (3) being connected to a cam connecting plate (8) bridge, and a cam handle (9) being provided on the top surface of the cam connecting plate (8).

6. A mechanical device for quick connection of pipe flanges according to claim 5, characterized in that: The cam mechanism further comprises a limit rack (10) and a rack block (11) which are engaged and locked. One end of the limit rack (10) is rotatably connected to the bottom end surface of the cam connecting plate (8) via a pin shaft (12), and the rack block (11) is arranged in an open groove of the cam top plate (5).

7. A mechanical device for quick connection of pipe flanges according to claim 1, characterized in that: The clamp assembly (4) comprises an upper clamp and a lower clamp with elastic deformation. When the upper clamp and the lower clamp are tightened by bolts, they are used to hold and lock the coiled pipe (3) on the connecting pipe (1).

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