A fiberglass pipe fitting device

Abstract

This utility model discloses a fiberglass pipe fitting device, relating to the technical field of fiberglass pipe production equipment. It includes two fiberglass pipes and a first connecting pipe positioned between them for connecting the two pipes. A second connecting pipe is provided on one side of the first connecting pipe. A first flange is fixedly connected between the first connecting pipe and one of the fiberglass pipes. Bolt holes distributed circumferentially are provided on the flange surface. This utility model, through the setting of the first positioning bolts, can fix the second sleeve and the second connecting pipe, preventing relative displacement between them. The setting of the anti-corrosion elastic ring can enhance the sealing performance and corrosion resistance of this part. The setting of the reinforcing component can achieve radial sealing, compensating for the minor deformation caused by the thermal expansion and contraction of the fiberglass pipe, and preventing media leakage. Traditional fiberglass pipe connections mostly rely on rigid flange connections without elastic compensation structures, making them prone to gaps when the pipes expand and contract or vibrate, leading to media leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of fiberglass pipe production equipment, and in particular to a fiberglass pipe fitting device. Background Technology

[0002] In the fields of chemical industry, municipal engineering, and energy, fiberglass pipes have become an important alternative to metal pipes due to their advantages such as light weight, corrosion resistance, and low fluid resistance. They are widely used in acid and alkali media transportation, sewage treatment, municipal water supply and drainage and other scenarios. Traditional FRP pipe connections typically use a "rigid flange connection," where the ends of two pipes are fastened together using flanges and bolts. While FRP is strong, it has poor toughness and expands and contracts with temperature changes. The rigid flange connection cannot absorb these minute deformations, which can lead to gaps on the flange sealing surface over time. In addition, in vibrating environments such as near pump units or in areas with vehicle traffic, the pipes will experience high-frequency micro-displacements due to external vibrations. The bolts in traditional flange connections are prone to loosening, which can then cause seal failure. Therefore, these problems need to be addressed. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a fiberglass pipe fitting device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a fiberglass pipe fitting device, comprising two fiberglass pipes and a first connecting pipe disposed between the two fiberglass pipes for connecting the fiberglass pipes, a second connecting pipe provided on one side of the first connecting pipe, a first flange fixedly connected between the first connecting pipe and one fiberglass pipe, and bolt holes distributed circumferentially on the surface of the first flange; a reinforcing component provided at the connection between the first connecting pipe and the second connecting pipe, a first sleeve fitted between the first connecting pipe and the reinforcing component, and a second flange fixedly connected between the second connecting pipe and the other fiberglass pipe.

[0005] Preferably, the reinforcing component includes a second sleeve fitted at the connection between the first connecting pipe and the second connecting pipe. Both the inner and outer rings of one end of the second sleeve are provided with annular mounting grooves, and the first airbag and the second airbag are respectively fitted into the two annular mounting grooves.

[0006] Preferably, the inner circumference of the first airbag abuts against the outer circumference of the second sleeve, the outer circumference of the first airbag abuts against the inner wall of the first sleeve, the outer circumference of the second airbag abuts against the inner circumference of the second sleeve, and the inner circumference of the second airbag abuts against the outer wall of the second connecting tube.

[0007] Preferably, the outer wall of the second sleeve has a plurality of first threaded holes arranged axially on its periphery, the bottom of the first threaded holes being connected to the outer wall of the second connecting pipe, and a first positioning bolt for fixing to the second connecting pipe is screwed into each of the plurality of first threaded holes. The outer wall of the first sleeve has a plurality of second threaded holes arranged axially on its periphery, the bottom of the second threaded holes being connected to the outer wall of the first connecting pipe, and a second positioning bolt for fixing to the first connecting pipe is screwed into each of the plurality of second threaded holes.

[0008] Preferably, a corrosion-resistant elastic ring is provided at the connection between the second connecting pipe and another glass pipe. The corrosion-resistant elastic ring is made of fluororubber and glass fiber composite, and the inner wall of the corrosion-resistant elastic ring is provided with multiple arc-shaped grooves along the circumference. The arc-shaped grooves are filled with polytetrafluoroethylene sealing filler.

[0009] Preferably, the second sleeve has two inflation holes on its side wall that are respectively connected to the interior of the first airbag and the second airbag. Each of the two inflation holes is sealed with a one-way inflation valve. A sealing cap is detachably connected to the outside of the one-way inflation valve. The outer walls of the first airbag and the second airbag are covered with an aging-resistant rubber layer. The surface of the aging-resistant rubber layer is integrally formed with anti-slip texture.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, the second sleeve and the second connecting pipe can be fixed by the cooperation of the first threaded hole and the first positioning bolt, preventing relative displacement between the two and ensuring the positioning stability of the reinforcing component; the cooperation of the second flange and the anti-corrosion elastic ring can enhance the sealing performance and corrosion resistance of this part; the setting of the reinforcing component can achieve double reinforcement, taking into account both structural stability and leak-proof sealing, realizing radial sealing, compensating for the small deformation caused by thermal expansion and contraction of FRP pipes, and preventing media leakage. Traditional FRP pipe connections mostly rely on rigid flange connections without elastic compensation structures, and gaps are easily formed when the pipes expand and contract or vibrate, leading to media leakage. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall first-view structure proposed in this utility model; Figure 2 This is a schematic diagram of the internal second-view structure proposed in this utility model; Figure 3 This is a partially enlarged schematic diagram of the reinforcing component proposed in this utility model. Figure 4This is a schematic diagram of the structure of some parts proposed in this utility model. Figure 5 This is a schematic diagram of the first connecting pipe structure proposed in this utility model; Figure 6 This is a schematic diagram of the reinforcing component structure proposed in this utility model.

[0012] The numbers in the diagram are: 1. Glass pipe; 2. First connecting pipe; 3. First flange; 4. First sleeve; 5. First positioning bolt; 6. Second sleeve; 7. Second connecting pipe; 8. Corrosion-resistant elastic ring; 9. First airbag; 10. Second airbag. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: See Figures 1 to 6 This utility model discloses a fiberglass pipe fitting device, comprising two fiberglass pipes 1 and a first connecting pipe 2 disposed between the two fiberglass pipes 1 for connecting the two fiberglass pipes 1. A second connecting pipe 7 is provided on one side of the first connecting pipe 2, which together with the first connecting pipe 2 forms a transition connection channel between the two fiberglass pipes 1 to achieve continuous transport of the medium. A first flange 3 is fixedly connected between the first connecting pipe 2 and one fiberglass pipe 1, which facilitates a rigid connection between the first connecting pipe 2 and the fiberglass pipe 1 and ensures the structural stability of the connection. Bolt holes distributed circumferentially are provided on the surface of the first flange 3. A reinforcing component is provided at the connection between the first connecting pipe 2 and the second connecting pipe 7. A first sleeve 4 is fitted between the first connecting pipe 2 and the reinforcing component. A second flange is fixedly connected between the second connecting pipe 7 and the other fiberglass pipe 1. The first sleeve 4 and the second sleeve 6 form a double-layer protective structure to enhance the impact resistance of the connection.

[0015] In this utility model, the reinforcing component includes a second sleeve 6 fitted at the connection between the first connecting pipe 2 and the second connecting pipe 7. Both the inner and outer rings of one end of the second sleeve 6 are provided with annular mounting grooves. A first airbag 9 and a second airbag 10 are respectively fitted into the two annular mounting grooves. The reinforcing component facilitates the use of expansion pressure to tightly connect the first sleeve 4 and the second sleeve 6, enhancing the radial sealing and fastening of the connection. The inner circumference of the first airbag 9 abuts against the outer ring of the second sleeve 6, and the outer ring of the first airbag 9 abuts against the inner wall of the first sleeve 4. The outer ring of the second airbag 10... The second sleeve 9 abuts against the inner ring of the second sleeve 6, and the inner ring of the second airbag 10 abuts against the outer wall of the second connecting pipe 7. The second sleeve 6 facilitates the accommodation of the first airbag 9 and the second airbag 10, while simultaneously reinforcing and sealing the connection. Multiple first threaded holes are axially arranged on the outer circumference of the second sleeve 6, with the bottom of each threaded hole connecting to the outer wall of the second connecting pipe 7. Each of the multiple threaded holes is screwed into a first positioning bolt 5 for fixing to the second connecting pipe 7. Multiple second threaded holes are axially arranged on the outer circumference of the first sleeve 4, with the bottom of each threaded hole connecting to the first connecting pipe. 2. On the outer wall, multiple second threaded holes are screwed with second positioning bolts for fixing to the first connecting pipe 2. The first positioning bolts 5 facilitate the fixing of the second sleeve 6 and the second connecting pipe 7, preventing relative displacement between them and ensuring the positioning stability of the reinforced component. A corrosion-resistant elastic ring 8 is provided at the connection between the second connecting pipe 7 and another glass pipe 1. The corrosion-resistant elastic ring 8 is made of fluororubber and glass fiber composite, and the inner wall of the corrosion-resistant elastic ring 8 has multiple arc-shaped grooves along the circumference, filled with polytetrafluoroethylene sealing filler. The anti-corrosion elastic ring 8 enhances the sealing performance and corrosion resistance of this part; the side wall of the second sleeve 6 has two inflation holes that communicate with the interior of the first airbag 9 and the second airbag 10 respectively. One-way inflation valves are sealed and embedded in both inflation holes. A sealing cap is detachably connected to the outside of the one-way inflation valve. The outer walls of the first airbag 9 and the second airbag 10 are covered with an aging-resistant rubber layer. The surface of the aging-resistant rubber layer is integrally formed with anti-slip texture. The second airbag 10 facilitates the tight connection between the second connecting pipe 7 and the second sleeve 6, enhancing the radial sealing and fixation between the two.

[0016] Working Principle: In using this invention, the pre-assembly and position calibration of each component are first completed to lay the foundation for subsequent fixing and sealing. One end of the first flange 3 is fixed to the end of one of the glass pipes 1, and the other end of the first flange 3 is aligned and tightened with one end of the first connecting pipe 2. Similarly, one end of the second flange is fixed to the end of another glass pipe 1, and the other end is pre-aligned with one end of the second connecting pipe 7, but not fully tightened yet, leaving room for fine-tuning. Then, the first sleeve 4 is fitted onto the outer wall of the first connecting pipe 2, ensuring that the second threaded hole on the first sleeve 4 corresponds to the position of the outer wall of the first connecting pipe 2; the second sleeve... The first positioning bolt 5 is screwed into the first threaded hole of the second sleeve 6 and not tightened yet, ensuring that the bottom of the bolt is in slight contact with the outer wall of the second connecting pipe 7 for initial positioning. After pre-assembly, the core connection between the first connecting pipe 2 and the second connecting pipe 7 is performed. The free end of the first connecting pipe 2 is aligned with the free end of the second connecting pipe 7. The axes of the two glass pipes 1, the first connecting pipe 2, and the second connecting pipe 7 are adjusted to ensure that they are coaxial, avoiding uneven sealing gaps caused by axial misalignment. The second sleeve 6 is then slid to cover the first connecting pipe 2 and the second connecting pipe 7. At this point, one end of the second sleeve 6 is fitted onto the outer wall of the first connecting pipe 2, and the other end is fitted onto the outer wall of the second connecting pipe 7. Tighten the first positioning bolt 5 on the second sleeve 6. The axial pressure of the bolt rigidly fixes the second sleeve 6 and the second connecting pipe 7, limiting their relative displacement. Simultaneously, it ensures that the second sleeve 6 and the outer wall of the first connecting pipe 2 are in close contact without gaps. The elastic expansion of the airbag and the rigid fixation of the sleeve work together to achieve sealing and structural reinforcement at the joint. Open the one-way inflation valve sealing cap on the side wall of the second sleeve 6, and use an inflation device to inflate the first airbag 9 and the second airbag 10 respectively. After the first airbag 9 is inflated... The first sleeve 4 expands, with its inner ring tightly abutting against the outer ring of the second sleeve 6, and its outer ring tightly abutting against the inner wall of the first sleeve 4. The expansion pressure fills the gap between the first sleeve 4 and the second sleeve 6. After the second airbag 10 is inflated, its outer ring tightly abutting against the inner ring of the second sleeve 6, and its inner ring tightly abutting against the outer wall of the second connecting pipe 7, filling the gap between the second sleeve 6 and the second connecting pipe 7. After inflation, the one-way inflation valve is closed and the sealing cap is closed to prevent gas leakage. After the core connection and sealing are completed, the device is finally fastened to the flange through anti-corrosion components to improve the overall sealing performance and corrosion resistance. This concludes the use of a fiberglass pipe sleeve device.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fiberglass pipe fitting device, comprising two glass pipes (1) and a first connecting pipe (2) disposed between the two glass pipes (1) for connecting the glass pipes (1), characterized in that: A second connecting pipe (7) is provided on one side of the first connecting pipe (2). A first flange (3) is fixedly connected between the first connecting pipe (2) and a glass pipe (1). Bolt holes distributed circumferentially are opened on the surface of the first flange (3). A reinforcing component is provided at the connection between the first connecting pipe (2) and the second connecting pipe (7). A first sleeve (4) is sleeved between the first connecting pipe (2) and the reinforcing component. A second flange is fixedly connected between the second connecting pipe (7) and another glass pipe (1).

2. The fiberglass pipe fitting device according to claim 1, characterized in that: The reinforcing component includes a second sleeve (6) sleeved at the connection between the first connecting pipe (2) and the second connecting pipe (7). The inner and outer rings of one end of the second sleeve (6) are provided with annular mounting grooves, and the first airbag (9) and the second airbag (10) are respectively sleeved in the two annular mounting grooves.

3. The fiberglass pipe fitting device according to claim 2, characterized in that: The inner circumference of the first airbag (9) abuts against the outer circumference of the second sleeve (6), the outer circumference of the first airbag (9) abuts against the inner wall of the first sleeve (4), the outer circumference of the second airbag (10) abuts against the inner circumference of the second sleeve (6), and the inner circumference of the second airbag (10) abuts against the outer wall of the second connecting tube (7).

4. The fiberglass pipe fitting device according to claim 3, characterized in that: The outer wall of the second sleeve (6) has a plurality of first threaded holes arranged axially on the periphery. The bottom of the first threaded holes is connected to the outer wall of the second connecting pipe (7). Each of the plurality of first threaded holes is screwed into a first positioning bolt (5) for fixing to the second connecting pipe (7). The outer wall of the first sleeve (4) has a plurality of second threaded holes arranged axially on the periphery. The bottom of the second threaded holes is connected to the outer wall of the first connecting pipe (2). Each of the plurality of second threaded holes is screwed into a second positioning bolt for fixing to the first connecting pipe (2).

5. A fiberglass pipe fitting device according to claim 1, characterized in that: The second connecting pipe (7) is provided with a corrosion-resistant elastic ring (8) at the connection point with another glass pipe (1). The corrosion-resistant elastic ring (8) is made of fluororubber and glass fiber composite. The inner wall of the corrosion-resistant elastic ring (8) is provided with multiple arc-shaped grooves along the circumference. The arc-shaped grooves are filled with polytetrafluoroethylene sealing filler.

6. A fiberglass pipe fitting device according to claim 2, characterized in that: The second sleeve (6) has two inflation holes on its side wall that are respectively connected to the inside of the first airbag (9) and the second airbag (10). Each of the two inflation holes is sealed with a one-way inflation valve. The one-way inflation valve is detachably connected to a sealing cap. The outer walls of the first airbag (9) and the second airbag (10) are covered with an aging-resistant rubber layer. The surface of the aging-resistant rubber layer is integrally formed with anti-slip ridges.

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