Connecting and fastening mechanism between pipe fittings

Abstract

The invention discloses a connecting and fastening mechanism between pipe fittings, belongs to the technical field of pipeline connection, and aims to solve the problems that traditional flange connecting bolts are many, installation is slow, spare parts are prone to being lost, and adaptability to a flange without a bolt hole is poor. The flanges are fixed to the ends of the pipe fitting, the hoop fixing plate is fixed to the outer side wall of the pipe fitting, each flange hoop mechanism comprises a flange hoop, and a gap used for containing two butt-joint flanges is formed in each flange hoop. The flange hoop mechanism is movably connected with the hoop fixing plate through a pin shaft so that the flange hoop mechanism can relatively slide and / or rotate, and therefore the flange hoop can be rapidly arranged on the outer side of a flange in a sleeving mode or move away to be stored, and the flange hoop fixing plate and the flange hoop mechanism are provided with connecting parts capable of being in butt joint, or a hoop fixing chain with a lock hook is additionally arranged. The quick connection mechanism has the advantages of being compact in structure, high in integration degree, quick to install, high in adaptability and capable of preventing parts from being lost easily, and is particularly suitable for quick connection of a flange without a bolt hole.

Description

Technical Field

[0001] This invention relates to the field of pipe connection technology, specifically to a pipe fitting connection and fastening mechanism, which is particularly suitable for quick and integrated connection of boltless flanges. Background Technology

[0002] In numerous fields such as petroleum, chemical, water supply and drainage, and steel structures, flange connections between pipes are one of the most widely used connection methods. Traditional flange connections rely on a large number of pre-drilled bolt holes on the flange, using groups of bolts, nuts, and gaskets for through-fastening. This method has significant drawbacks: First, for flanges without pre-designed bolt holes (such as some beveled flanges), the traditional method cannot be directly applied, requiring additional machining of holes or the use of complex third-party fixtures, resulting in poor adaptability and increased costs. Second, the large number of bolts leads to cumbersome and time-consuming installation and disassembly processes, resulting in high labor intensity. Furthermore, the large number of bolts, nuts, gaskets, and special fixtures are easily lost or confused during transportation, storage, and construction, causing management difficulties and affecting assembly efficiency. With the increasing demands for rapid construction, reduced labor costs, and improved reliability in engineering projects, a new type of pipe connection and fastening solution is urgently needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a connection mechanism that is compact in structure, easy to operate, and can realize rapid integrated fastening between pipe fittings, especially suitable for flange connections without bolt holes.

[0004] To solve the aforementioned technical problems, the present invention adopts the following technical solution: a pipe fitting connection and fastening mechanism, including a pipe fitting, a flange fixed to the end of the pipe fitting, a clamp fixing plate fixedly connected to the outer wall of the pipe fitting, and at least one flange clamp mechanism. The flange clamp mechanism includes a flange clamp, which has an internal gap for accommodating two mating flanges. Crucially, the clamp fixing plate is provided with a first connecting portion, and the flange clamp mechanism is provided with a second connecting portion. When the flange clamp mechanism moves to a predetermined installation position, the first connecting portion and the second connecting portion can be connected by a detachable fastener.

[0005] As a further optimization of the present invention: The flange sleeve mechanism is movably connected to the sleeve fixing plate via a pin, allowing it to slide and / or rotate relative to the sleeve fixing plate, thereby causing the flange sleeve to be selectively fitted onto the outside of the flange or moved away from the flange.

[0006] The flange fixing plate is provided with a sliding groove extending radially along the pipe fitting, and the pin is slidably disposed in the sliding groove to guide the movement of the flange clamp mechanism.

[0007] It also includes a clamp fixing chain that is fixedly connected to the outer wall of the pipe fitting, with a locking hook at its free end, which can hook and fix the flange clamp mechanism when not in the installation state.

[0008] The flange is a flange without bolt holes, and its end face facing the mating side is a sloped surface that is higher on the inside and lower on the outside.

[0009] The shape of the gap inside the flange sleeve is adapted to the combined outer contour of the two mating flanges to ensure a tight fit and achieve effective fastening and sealing.

[0010] The outer wall of the flange sleeve is provided with multiple connection holes for fastening bolts to pass through, so that the entire sleeve and flange can be locked with a small number of bolts.

[0011] The flange clamp mechanism also includes an elastic retaining ring installed on the pin shaft, which is used to limit the flange clamp mechanism to the clamp fixing plate and prevent it from accidentally coming off.

[0012] Typically, there are two flange clamping mechanisms, symmetrically arranged on the two pipe fittings to be connected.

[0013] The advantages of this invention compared to existing technologies are as follows: This invention replaces the traditional multi-bolt through-bolt method with an integrated flange clamp mechanism and a small number of through bolts, greatly reducing tightening work and significantly improving installation and disassembly speed. In this invention, the flange clamp mechanism and pipe fitting are integrated into one unit via a clamp fixing plate, and the mechanism itself is a combination of clamp, pin, and retaining ring, significantly reducing the number of independent parts and fundamentally avoiding the problem of lost parts. The flange clamp mechanism of this invention adopts a unique sliding / rotating structure, making the mechanism neat and space-saving in its non-installation state, and easy to access. The flange clamp is specifically adapted to beveled flanges without bolt holes, solving the problem of direct connection using traditional methods. All functional components are arranged around the pipe fitting, resulting in a compact structure, particularly suitable for space-constrained or high-altitude work environments, simplifying operation steps and reducing construction difficulty and labor intensity. Attached Figure Description

[0014] The present invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a front view structural diagram of the present invention.

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 4 This is a schematic diagram of the flange sleeve mechanism in the retracted state in this invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the flange sleeve mechanism in the retracted state in this invention.

[0020] Figure 6 This is a front view schematic diagram of the flange clamping mechanism in this invention.

[0021] Figure 7 This is a side view of the flange clamping mechanism in this invention.

[0022] In the diagram: 1 is a pipe fitting, 2 is a flange, 3 is a flange clamping mechanism, 30 is a flange clamp, 31 is a pin, 32 is an elastic retaining ring, 4 is a clamp fixing plate, and 5 is a clamp fixing chain. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] like Figures 1 to 7 As shown, the present invention provides a pipe fitting connection and fastening mechanism, which mainly includes a pipe fitting 1, a flange 2, a clamp fixing plate 4, a clamp fixing chain 5, and a flange clamp mechanism 3.

[0025] The flange 2 is fixed (e.g., welded) to the end of the pipe fitting 1. It is designed as a beveled flange without bolt holes, and the mating end face is higher on the inside and lower on the outside.

[0026] The clamp fixing plate 4 is welded and fixed to the outer wall of the pipe fitting 1, and a sliding groove extending radially along the pipe fitting 1 is formed on its plate surface. One end of the clamp fixing plate 4 is provided with an upwardly extending connecting plate, which has a fixing hole to form the first connecting part.

[0027] The clamp fixing chain 5 is also fixedly connected to the outer wall of the pipe fitting 1, located near the clamp fixing plate 4, and its end is provided with a locking hook, which can be movably hooked together with the clamp fixing plate 4.

[0028] The flange clamp mechanism 3 is an integrated component, including a flange clamp 30, a pin 31, and an elastic retaining ring 32. The flange clamp 30 has an internal gap that perfectly matches the combined shape of the two mating flanges 2, and four connecting holes are evenly distributed on its outer side. The flange clamp mechanism 3 is connected to the clamp fixing plate 4 via the pin 31 passing through its connecting lug and engaging with the groove. The end of the pin 31 is fitted with an elastic retaining ring 32, thus allowing the entire mechanism to be slidably and rotatably mounted on the clamp fixing plate 4. The flange clamp mechanism 3 also has a connecting plate with fixing holes, forming a second connecting part.

[0029] The working process of this invention is as follows: Storage State: When no connection is required, the flange clamp mechanism 3 can be slid outward along the groove to its end, and then rotated upward by about 90 degrees so that it lies flat above the clamp fixing plate 4. At this time, the second connecting part on the mechanism is aligned with the first connecting part on the clamp fixing plate 4, and a fixing pin (such as a cotter pin or latch pin) can be inserted to securely lock the mechanism in the storage position. Alternatively, without rotation, the locking hook of the clamp fixing chain 5 can be used to hook the appropriate part of the flange clamp mechanism 3 for fixation.

[0030] Operating Procedure: When connecting two pipes, first align and fit the flange 2 ends of the two pipe fittings together. Then, remove the retaining pin or unlock the hook, rotate the flange clamp mechanism 3 back to a direction parallel to the pipe fitting axis, and slide it inward along the groove until the flange clamp 30 completely covers the two mating flanges 2. Finally, pass four high-strength bolts through the four connection holes on the outside of the flange clamp 30, and tighten the nuts symmetrically with a wrench to complete a quick and reliable fastening connection.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pipe fitting connection and fastening mechanism, characterized in that, include: Pipe fitting (1), with a flange (2) fixed at its end; The sleeve fixing plate (4) is fixedly connected to the outer wall of the pipe fitting (1); At least one flange clamp mechanism (3) includes a flange clamp (30) having a cavity inside for accommodating two mating flanges (2); The clamp fixing plate (4) is provided with a first connecting part, and the flange clamp mechanism (3) is provided with a second connecting part. When the flange clamp mechanism (3) moves to the predetermined installation position, the first connecting part and the second connecting part can be connected by a detachable fastener.

2. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, The flange clamp mechanism (3) is movably connected to the clamp fixing plate (4) via a pin (31), so that the flange clamp mechanism (3) can slide and / or rotate relative to the clamp fixing plate (4) so ​​that the flange clamp (30) can be selectively fitted onto the outside of the flange (2) or moved away from the flange (2).

3. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, The sleeve fixing plate (4) is provided with a sliding groove extending radially and obliquely along the pipe fitting (1), and the pin (31) is slidably disposed in the sliding groove.

4. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, It also includes a clamp fixing chain (5) fixedly connected to the outer wall of the pipe fitting (1), and the free end of the clamp fixing chain (5) is provided with a locking hook for hooking and fixing the flange clamp mechanism (3) when not installed.

5. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, The flange (2) is a flange without bolt holes, and its end face facing the mating side is an inclined surface with the inner side higher than the outer side.

6. The pipe fitting connection and fastening mechanism according to claim 5, characterized in that, The shape of the gap inside the flange sleeve (30) is adapted to the combined outer contour of the two mating flanges (2).

7. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, The outer wall of the flange sleeve (30) is provided with multiple connection holes for fastening bolts to pass through.

8. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, The flange clamp mechanism (3) also includes an elastic retaining ring (32), which is installed on the pin (31) and is used to fix the flange clamp mechanism (3) on the clamp fixing plate (4) in conjunction with the pin (31).

9. The pipe fitting connection and fastening mechanism according to claim 1, characterized in that, The flange clamp mechanism (3) consists of two parts, which are symmetrically arranged on the two pipe fittings (1) to be connected.

10. A piping system, characterized in that, It includes at least two pipe fittings (1) connected by a pipe fitting connection fastening mechanism as described in any one of claims 1-9.

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