Quick assembly structure of plate type butt welded flange and pipe

Abstract

The utility model relates to pipeline connection technical field, concretely to the quick assembly structure of plate type flat welding flange and connecting pipe, including installation pipe and plate type flat welding flan body, one side of plate type flat welding flan body is equipped with the locating ring, one side of locating ring is equipped with threaded tube, one side of locating ring is opened toothed groove, toothed groove is equipped with a plurality of and annular array setting, one end inner wall of installation pipe is opened threaded groove, one end of installation pipe is equipped with sealing ring, be equipped with fastening box on sealing ring, the inside of fastening box is opened fastening groove, one side of fastening box is opened threaded hole, be equipped with threaded column on threaded hole, one end of threaded column is equipped with bearing seat, this structure realizes threaded prepositioning and adds toothed locking double fastening, single group dismouting time is shorter than welding, and the connection strength is promoted, does not need professional tool, adapts the quick installation and maintenance of industry and civilian pipeline.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, specifically a rapid assembly structure for plate-type flat welding flanges and connecting pipes. Background Technology

[0002] As is well known, in pipeline systems such as water supply and drainage, and industrial fluid transportation, the connection between plate-type flat-welded flanges and installation pipes is a crucial link in achieving pipeline extension and equipment docking. Currently, the mainstream connection methods in the industry have several technical drawbacks: First, traditional welding connections rely on specialized welding equipment and technicians, resulting in a cumbersome and time-consuming assembly process (the average time for a single conventional welding connection exceeds 30 minutes). Furthermore, the high welding temperatures can easily cause thermal deformation of the flange and installation pipe materials, reducing the strength and corrosion resistance of the connection. Subsequent maintenance requires destructive cutting, making disassembly extremely difficult. Second, conventional bolted connections require multiple bolts arranged circumferentially along the flange. During installation, each bolt hole must be aligned and tightened individually, resulting in redundant steps. Moreover, the bolts, being exposed for extended periods, are susceptible to media corrosion or environmental rust, leading to jamming during later disassembly. Third, while single-threaded connections eliminate the need for welding and multiple bolt operations, they rely solely on the friction between the thread teeth for fastening. Under conditions such as pipeline vibration and media pressure fluctuations, thread loosening is prone to occur, and the thread gaps can easily create leakage channels, making it difficult to guarantee sealing performance. This makes them particularly unsuitable for high-pressure or high-precision transportation scenarios.

[0003] While some structures allow for rapid installation, disassembly requires significant manpower and resources; others are easy to disassemble but sacrifice robustness and reliability. For scenarios requiring rapid assembly and disassembly, such as pipeline repairs and equipment upgrades, existing technologies have not yet provided effective solutions. Therefore, there is an urgent need for an assembly structure that balances efficiency, sealing, and robustness. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a rapid assembly structure for plate-type flat welding flanges and connecting pipes.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a quick assembly structure for a plate-type flat-welded flange and a connecting pipe, comprising an installation pipe and a plate-type flat-welded flange body. A positioning ring is provided on one side of the plate-type flat-welded flange body, and a threaded pipe is provided on one side of the positioning ring. Multiple toothed grooves are provided on one side of the positioning ring and arranged in a circular array. A threaded groove is provided on the inner wall of one end of the installation pipe, and a sealing ring is provided at one end of the installation pipe. A fastening box is provided on the sealing ring, and a fastening groove is provided inside the fastening box. A threaded hole is provided on one side of the fastening box, and a threaded post is provided on the threaded hole. A bearing seat is provided at one end of the threaded post, and the bearing seat is located in the fastening groove. A push plate is provided at one end of the bearing seat. A fastening hole is provided on the other side of the fastening box, and a toothed post is provided in the fastening hole. The toothed post is fixed to one side of the push plate.

[0008] Furthermore, the inner wall of the fastening groove is provided with a sliding groove, and a slider is provided on one side of the push plate, the slider being slidably connected to the sliding groove.

[0009] Furthermore, both the slide groove and the slider are provided in two sets and are arranged symmetrically.

[0010] Furthermore, one end of the mounting tube is provided with a high and low temperature resistant rubber sealing ring.

[0011] Furthermore, the push plate is adapted to the size of the fastening groove, and the push plate is provided with ventilation holes.

[0012] Furthermore, the threaded column has an integrated knob at the end away from the bearing seat, and the knob has knurled anti-slip texture on its outer periphery.

[0013] Furthermore, the bearing housing is a deep groove ball bearing housing or a sliding bearing housing. The inner ring of the bearing housing is interference-fitted with the threaded post, and the outer ring is fixedly connected to the push plate by countersunk bolts. A rubber dustproof sealing ring is provided on its outer circumference.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a quick assembly structure for plate-type flat welding flanges and connecting pipes, which has the following beneficial effects:

[0016] This plate-type flat-welded flange and pipe assembly structure allows for quick assembly. During assembly, the pre-positioning is completed by screwing the threaded pipe into the threaded groove (taking less than 1 minute). Then, rotating the threaded column drives the toothed column to engage with the toothed groove to lock it in place. During disassembly, rotating the threaded column in the opposite direction disengages the toothed column from the toothed groove, and loosening the thread allows the parts to be separated. The total time for disassembly and assembly of a single set is reduced by more than 90% compared to welding and by more than 70% compared to bolted connections. It is especially suitable for scenarios with high timeliness requirements, such as emergency repairs and equipment replacement.

[0017] The annular array of teeth on the positioning ring forms a rigid meshing with the toothed column, achieving dual locking of circumferential anti-rotation and axial anti-disengagement using the normal constraint force between the teeth. This solves the problem of loosening caused by vibration and pressure fluctuations in single threaded connections. At the same time, the threaded column drives the push plate to slide through the bearing seat, ensuring precise meshing between the toothed column and the toothed groove. This results in a uniform distribution of the fastening force along the circumference, increasing the connection strength by more than 3 times compared to ordinary threaded connections. It can be adapted to complex working conditions such as high pressure (≤10MPa) and vibration (frequency ≤50Hz). Attached Figure Description

[0018] Figure 1 This is a first-view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0020] Figure 3 This utility model Figure 1 Enlarged front half-sectional view of the central mounting tube;

[0021] Figure 4 This utility model Figure 1 Enlarged front half-sectional view of the body of the medium-plate flat welding flange.

[0022] In the diagram: 1. Mounting pipe; 2. Plate-type flat-welded flange body; 3. Locating ring; 4. Threaded pipe; 5. Toothed groove; 6. Threaded groove; 7. Sealing ring; 8. Fastening box; 9. Threaded column; 10. Bearing seat; 11. Push plate; 12. Slide groove; 13. Sliding block; 14. High and low temperature resistant rubber sealing ring; 15. Vent hole; 16. Knob; 17. Toothed column. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4This utility model is a quick assembly structure for a plate-type flat-face flange and a connecting pipe, including an installation pipe 1 and a plate-type flat-face flange body 2. A positioning ring 3 is provided on one side of the plate-type flat-face flange body 2, and a threaded pipe 4 is provided on one side of the positioning ring 3. A toothed groove 5 is provided on one side of the positioning ring 3, and multiple toothed grooves 5 are arranged in a circular array. A threaded groove 6 is provided on the inner wall of one end of the installation pipe 1, and a sealing ring 7 is provided at one end of the installation pipe 1. A fastening box 8 is provided on the sealing ring 7, and a fastening groove is provided inside the fastening box 8. A threaded hole is provided on the side, and a threaded post 9 is provided on the threaded hole. A bearing seat 10 is provided at one end of the threaded post 9. The bearing seat 10 is located in the fastening groove. A push plate 11 is provided at one end of the bearing seat 10. A fastening hole is provided on the other side of the fastening box 8, and a toothed post 17 is provided in the fastening hole. The toothed post 17 is fixed to one side of the push plate 11. In this embodiment, polytetrafluoroethylene sealing tape (existing technology) is wrapped around the outer wall of the threaded pipe 4. Then, the threaded pipe 4 on one side of the plate flat welding flange body 2 is aligned with the threaded groove 6 on the inner wall of one end of the mounting pipe 1. By rotating the plate-type flat welding flange body 2 or the mounting pipe 1, the threaded pipe 4 is screwed into the threaded groove 6, achieving initial connection and axial pre-positioning. At this time, the sealing ring 7 at the end of the mounting pipe 1 is attached to the side of the positioning ring 3 and the fastening hole is aligned with a toothed groove 5, laying the foundation for subsequent sealing and fastening. The operator rotates the threaded column 9 on the fastening box 8, and the threaded column 9 moves axially along the threaded hole. Its end drives the push plate 11 to slide in the fastening groove through the bearing seat 10. The push plate 11 simultaneously pushes the toothed column 17 fixed on one side of it through the fastening hole and gradually approaches the positioning ring. The toothed groove 5 on plate 3 is continuously rotated by the threaded column 9 until the toothed column 17 is fully engaged with the toothed groove 5. The mechanical engagement between the teeth achieves circumferential and axial double locking between the plate flat welding flange body 2 and the mounting pipe 1, completing the assembly and fastening. This allows for the quick assembly of the mounting pipe 1 onto the plate flat welding flange body 2. When disassembly is required later, the threaded column 9 is rotated in the opposite direction to make the toothed column 17 leave the toothed groove 5. Then, the plate flat welding flange body 2 or the mounting pipe 1 is rotated to make the threaded groove 6 leave the threaded pipe 4, achieving quick disassembly of the plate flat welding flange body 2 and the mounting pipe 1.

[0025] In this design, the inner wall of the fastening groove is provided with a sliding groove 12, and a slider 13 is provided on one side of the push plate 11. The slider 13 is slidably connected to the sliding groove 12. The sliding groove 12 provides axial guidance and radial limiting for the slider 13, thus constraining the movement trajectory of the push plate 11 to a straight line parallel to the axes of the toothed column 17 and the toothed groove 5. When the slider 13 slides within the sliding groove 12, it restricts the push plate 11 from radial displacement or circumferential rotation within the fastening groove, ensuring that the push plate 11 moves only along the axial direction of the fastening groove. Both the sliding groove 12 and the slider 13 are provided in two sets and symmetrically arranged. The symmetrical distribution of the two sets of sliding grooves 12 and sliders 13 ensures that the force on both sides of the push plate 11 is balanced. When the threaded column 9 pushes the push plate 11 through the bearing seat 10, the two sets of sliders 13 slide synchronously along the sliding groove 12, forming symmetrical guide support points to counteract the overturning moment generated by the force on one side of the push plate 11.

[0026] In this solution, one end of the mounting tube 1 is provided with a high and low temperature resistant rubber sealing ring 14. Utilizing the elastic deformation characteristics of high and low temperature resistant rubbers such as silicone rubber and fluororubber, the sealing ring is compressed and deformed under the contact pressure of the sealing ring 7 and the positioning ring 3, filling the micro gap between the two. At the same time, the material itself has temperature stability of -60℃ to 200℃ or a wider range, which can resist aging, hardening or softening under extreme temperatures.

[0027] In this design, the push plate 11 is sized to match the fastening groove. The push plate 11 has ventilation holes 15 to reduce wobbling between the push plate 11 and the groove wall. The ventilation holes 15 balance the air pressure within the fastening groove. When the push plate 11 slides, air inside the groove is discharged through the ventilation holes 15, preventing air resistance from hindering the movement of the push plate 11. The sized fit improves the movement accuracy of the push plate 11, and the ventilation holes 15 eliminate air resistance, making the rotation of the threaded column 9 smoother.

[0028] In this design, an integrated knob 16 is provided at the end of the threaded column 9 away from the bearing seat 10. The knob 16 has knurled anti-slip texture on its outer periphery. Based on the lever principle, the integrated knob 16 increases the torque arm of the threaded column 9, allowing the operator to drive the threaded column 9 to rotate with a smaller force. The knurled anti-slip texture on the outer periphery of the knob 16 increases the friction coefficient between the hand and the knob 16, preventing slippage during manual operation.

[0029] In this design, the bearing housing 10 is either a deep groove ball bearing housing or a sliding bearing housing. The inner ring of the bearing housing 10 is interference-fitted with the threaded post 9, and the outer ring is fixedly connected to the push plate 11 by countersunk bolts. A rubber dustproof seal is provided on its outer circumference. The deep groove ball bearing housing can withstand combined radial and axial loads. Torque is transmitted through the interference fit between the inner ring and the threaded post 9, and the fixing of the outer ring to the push plate 11 achieves efficient conversion from rotary motion to linear motion. The sliding bearing housing achieves motion conversion through a low-friction sliding pair such as a PTFE bushing. The countersunk bolt fixing prevents the outer ring protrusion from interfering with the movement of the push plate 11, and the rubber dustproof seal prevents dust and impurities from entering the gap of the bearing housing 10.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick assembly structure for a plate-type flat-face welding flange and a connecting pipe, comprising an installation pipe (1) and a plate-type flat-face welding flange body (2), characterized in that, The plate-type flat welding flange body (2) is provided with a positioning ring (3) on one side, a threaded pipe (4) on one side of the positioning ring (3), a toothed groove (5) on one side of the positioning ring (3), and multiple toothed grooves (5) arranged in a ring array. A threaded groove (6) is provided on the inner wall of one end of the mounting pipe (1), a sealing ring (7) is provided on one end of the mounting pipe (1), a fastening box (8) is provided on the sealing ring (7), a fastening groove is provided inside the fastening box (8), a threaded hole is provided on one side of the fastening box (8), a threaded post (9) is provided on the threaded hole, a bearing seat (10) is provided at one end of the threaded post (9), the bearing seat (10) is located in the fastening groove, a push plate (11) is provided at one end of the bearing seat (10), a fastening hole is provided on the other side of the fastening box (8), a toothed post (17) is provided in the fastening hole, and the toothed post (17) is fixed on one side of the push plate (11).

2. The rapid assembly structure of the plate-type flat welding flange and the connecting pipe according to claim 1, characterized in that, The inner wall of the fastening groove is provided with a sliding groove (12), and a slider (13) is provided on one side of the push plate (11), and the slider (13) is slidably connected to the sliding groove (12).

3. The rapid assembly structure of the plate-type flat welding flange and the connecting pipe according to claim 2, characterized in that, Both the slide groove (12) and the slider (13) are provided in two sets and are arranged symmetrically.

4. The rapid assembly structure of the plate-type flat-welding flange and connecting pipe according to claim 1, characterized in that, One end of the mounting tube (1) is provided with a high and low temperature resistant rubber sealing ring (14).

5. The rapid assembly structure of the plate-type flat-welding flange and connecting pipe according to claim 1, characterized in that, The push plate (11) is adapted to the size of the fastening groove, and the push plate (11) is provided with a vent hole (15).

6. The rapid assembly structure of the plate-type flat welding flange and the connecting pipe according to claim 1, characterized in that, The threaded post (9) is provided with an integrated knob (16) at the end away from the bearing seat (10), and the knob (16) is provided with knurled anti-slip texture on its outer periphery.

7. The rapid assembly structure of the plate-type flat welding flange and the connecting pipe according to claim 1, characterized in that, The bearing housing (10) is a deep groove ball bearing housing or a sliding bearing housing. The inner ring of the bearing housing (10) is interference-fitted with the threaded column (9), and the outer ring is fixedly connected to the push plate (11) by countersunk bolts. A rubber dustproof sealing ring is provided on its outer periphery.

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