Connecting structure of high-ring-stiffness composite pipe

Abstract

The utility model relates to the related technical field of pipeline connection, and discloses a connecting structure of a high-ring-stiffness composite pipe, which is improved on the basis of a traditional pipeline joint, and a double-end pin and an injector are additionally arranged at the joint, so that when a thread bushing is screwed down, the double-end pin can apply pressure to a constant-pressure baffle under the pressure action of a spring, and the pressure of the constant-pressure baffle is reduced; when the pre-tightening force of the threaded sleeve reaches the standard, the double-end pin can exactly crush the constant-pressure blocking piece, anti-seepage liquid in an injector is injected into a threaded gap between the threaded sleeve and the threaded connector, and therefore multiple effects can be achieved, after the double-end pin crushes the constant-pressure blocking piece and is inserted into the liquid injection groove, the threaded sleeve cannot rotate any more, and the anti-seepage effect is achieved. The pretightening force of the thread bushing can be determined to reach the standard without using a torque wrench; the double-end pin also limits the looseness of the thread bushing, so that the thread bushing cannot rotate reversely, and the ring stiffness of the joint is also enhanced; the double-end pin pushes the injector to inject anti-seepage liquid into a threaded gap between the threaded sleeve and the threaded connector, and leakage at the connector can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field related to pipeline connection, in particular to a connection structure of a high-ring-rigidity composite pipe. Background Art

[0002] Composite pipes are usually made of a stacked combination of two or more different materials and are often used in chemical, marine, sewage treatment and other fields.

[0003] The ring stiffness of traditional composite pipe joints is low, resulting in poor ability of the pipe to resist torsion when subjected to torque, which in turn increases the risk of rupture or leakage in the pipeline system, affecting the normal operation and service life of the pipeline system. Utility Model Content

[0004] The utility model aims to provide a connection structure of a composite pipe with high ring stiffness. The device is adopted to work, thereby solving the problem of low ring stiffness at the existing composite pipe connection joint.

[0005] To achieve the above object, the utility model provides the following technical solution: a connection structure of a high ring stiffness composite pipe, comprising a first pipe connection end and a second pipe connection end, characterized in that: the first pipe connection end is provided with a first threaded sleeve on its outer shell, the second pipe connection end is provided with a second threaded sleeve on its outer shell, a threaded connector is provided between the first pipe connection end and the second pipe connection end, and the first threaded sleeve and the second threaded sleeve are respectively connected to the threaded connector through threads;

[0006] The first threaded sleeve and the second threaded sleeve are respectively movably connected with a rotating circle on the inner side, and multiple groups of double-headed pins are passed through the rotating circle, and a push spring is arranged on one side of the double-headed pin. Multiple groups of spring grooves are arranged around the threaded connector, and pressure springs are arranged in the spring grooves. A group of spring pressure blocks are arranged at each end of the pressure spring. Multiple groups of liquid injection grooves are arranged on the inner side of the first threaded sleeve and the second threaded sleeve, and syringes are inserted into the liquid injection grooves. The end of the liquid injection groove is provided with a liquid injection channel connected to the inner threads of the first threaded sleeve and the second threaded sleeve, and a constant pressure baffle is arranged at the opening of the liquid injection groove.

[0007] Furthermore, the first pipe connection end is provided with a first retaining ring, the diameter of the first retaining ring is larger than the minimum inner diameter of the first threaded sleeve, and the second pipe connection end is provided with a second retaining ring, the diameter of the second retaining ring is larger than the minimum inner diameter of the second threaded sleeve.

[0008] Furthermore, a first sealing ring is provided between the first pipe connection end and the threaded connector, and a second sealing ring is provided between the second pipe connection end and the threaded connector.

[0009] Furthermore, the rotating ring is rotatably connected to the first threaded sleeve and the second threaded sleeve via a rotating clamping block.

[0010] Furthermore, the syringe contains leak-proof glue, the tip of the syringe is inserted inwardly into the injection groove, and the tip opening of the syringe is connected to the injection channel.

[0011] Furthermore, the constant pressure baffle is embedded in the opening of the liquid injection groove, and a center piece is arranged at the center of the constant pressure baffle, and prefabricated rupture lines are processed around the center piece. The diameter of the center piece is smaller than the diameter of the liquid injection groove, and the diameter of the center piece is larger than the diameter of the double-headed pin.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model proposes a connection structure of a high ring stiffness composite pipe, which is improved based on a traditional pipe joint. A double-headed pin and a liquid injection groove are additionally provided at the joint. A syringe filled with an anti-seepage liquid is inserted into the liquid injection groove. At the same time, a constant pressure baffle is provided in the liquid injection groove. In this way, when the threaded sleeve is tightened, the double-headed pin will apply pressure to the constant pressure baffle under the action of the spring pressure. When the pre-tightening force of the threaded sleeve reaches the standard, the double-headed pin can just break the constant pressure baffle, and inject the anti-seepage liquid in the syringe into the thread gap between the threaded sleeve and the threaded connector, thereby achieving multiple effects:

[0014] First, after the double-headed pin breaks the constant pressure baffle and is inserted into the injection groove, the threaded sleeve will no longer be able to rotate, and it can be determined that the preload force of the threaded sleeve meets the standard without using a torque wrench;

[0015] Second, the double-headed pin also limits the loosening of the threaded sleeve, making it impossible to reverse, and also strengthens the ring stiffness of the joint;

[0016] Third, the double-headed pin pushes the syringe to inject the anti-seepage liquid into the thread gap between the threaded sleeve and the threaded connector, which can prevent leakage at the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 This is a schematic diagram of the rotating circle structure of the utility model;

[0022] Figure 6 For the utility model Figure 5 Enlarged structural diagram at B in the middle.

[0023] In the figure: 1, first pipe connection end; 101, first retaining ring; 2, second pipe connection end; 201, second retaining ring; 3, first threaded sleeve; 4, second threaded sleeve; 5, threaded connector; 6, first sealing ring; 7, second sealing ring; 8, rotating block; 9, rotating circle; 10, double-headed pin; 11, pushing spring; 12, spring groove; 13, pressure spring; 14, spring pressure block; 15, injection groove; 16, syringe; 17, injection channel; 18, constant pressure retaining plate; 1801, center plate; 1802, prefabricated rupture line. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0026] Combination Figure 1-Figure 6 A connection structure of a high ring stiffness composite pipe, comprising a first pipe connection end 1 and a second pipe connection end 2, characterized in that: the first pipe connection end 1 is provided with a first threaded sleeve 3, the second pipe connection end 2 is provided with a second threaded sleeve 4, the first pipe connection end 1 is provided with a first retaining ring 101, the diameter of the first retaining ring 101 is greater than the minimum inner diameter of the first threaded sleeve 3, the second pipe connection end 2 is provided with a second retaining ring 201, the diameter of the second retaining ring 201 is greater than the minimum inner diameter of the second threaded sleeve 4, so that the first threaded sleeve 3 and the second threaded sleeve 4 are respectively sleeved on the first pipe When the connection end 1 and the second pipe connection end 2 are on, the first retaining ring 101 and the second retaining ring 201 can limit the first threaded sleeve 3 and the second threaded sleeve 4, so that the first retaining ring 101 and the second retaining ring 201 can be pressed when the first threaded sleeve 3 and the second threaded sleeve 4 are tightened. A first sealing ring 6 is arranged between the first pipe connection end 1 and the threaded connector 5, and a second sealing ring 7 is arranged between the second pipe connection end 2 and the threaded connector 5. Therefore, when the first retaining ring 101 and the second retaining ring 201 are pressed on both ends of the threaded connector 5, a buffer can be formed to prevent leakage.

[0027] A threaded connector 5 is provided between the first pipe connection end 1 and the second pipe connection end 2, and the first threaded sleeve 3 and the second threaded sleeve 4 are respectively connected to the threaded connector 5 through threads;

[0028] The first threaded sleeve 3 and the second threaded sleeve 4 are respectively movably connected with a rotating circle 9 on the inner side, and multiple groups of double-headed pins 10 are passed through the rotating circle 9. A push spring 11 is arranged on one side of the double-headed pin 10. Multiple groups of spring grooves 12 are arranged around the threaded connector 5. Pressure springs 13 are arranged in the spring grooves 12. A group of spring pressure blocks 14 are arranged at each end of the pressure spring 13. Multiple groups of liquid injection grooves 15 are arranged on the inner side of the first threaded sleeve 3 and the second threaded sleeve 4. A syringe 16 is inserted into the liquid injection groove 15. An injection channel 17 connected to the inner thread of the first threaded sleeve 3 and the second threaded sleeve 4 is arranged at the end of the liquid injection groove 15. The syringe 16 contains an anti-seepage liquid. The tip of the syringe 16 is inserted into the liquid injection groove 15 inwardly, and the tip opening of the syringe 16 is connected to the liquid injection channel 17. A constant pressure baffle 18 is arranged at the opening of the liquid injection groove 15.

[0029] Specifically, the rotating ring 9 is rotatably connected to the first threaded sleeve 3 and the second threaded sleeve 4 through the rotating clamping block 8, so that after the double-headed pin 10 is inserted into the spring groove 12, the first threaded sleeve 3 and the second threaded sleeve 4 can continue to be rotated and tightened.

[0030] Specifically, the constant pressure baffle 18 is embedded in the opening of the injection groove 15, and a center piece 1801 is arranged at the center of the constant pressure baffle 18. Prefabricated rupture lines 1802 are processed around the center piece 1801. The pressure required for the rupture of the center piece 1801 is also determined during the processing of the prefabricated rupture lines 1802, so as to facilitate the adjustment of the appropriate preload force. The diameter of the center piece 1801 is smaller than the diameter of the injection groove 15, and the diameter of the center piece 1801 is larger than the diameter of the double-headed pin 10, so that the double-headed pin 10 can break the center piece 1801 and be inserted into the injection groove 15.

[0031] Working principle: During use, the first threaded sleeve 3 and the second threaded sleeve 4 are firstly sleeved on the first pipe connection end 1 and the second pipe connection end 2 respectively, and then the first threaded sleeve 3 and the second threaded sleeve 4 are respectively connected to the threaded connector 5 through threads.

[0032] During the process of tightening the threads, the double-headed pin 10 on one side of the first threaded sleeve 3 and the second threaded sleeve 4 will gradually insert into the spring groove 12 on the threaded connector 5, thereby pushing the spring pressure block 14 to compress the pressure spring 13. When the first threaded sleeve 3 and the second threaded sleeve 4 are tightened to a certain extent and the preload force reaches the standard, the force of the pressure spring 13 to push the double-headed pin 10 to the right will also break through the critical point, and the center plate 1801 on the constant pressure baffle 18 will be crushed along the prefabricated rupture line 1802, so that the double-headed pin 10 is inserted into the injection groove 15, preventing the first threaded sleeve 3 and the second threaded sleeve 4 from continuing to rotate, preventing the preload force from being too large, and at the same time, the double-headed pin 10 can also strengthen the ring stiffness at the joint to avoid loosening of the joint.

[0033] When the double-headed pin 10 is inserted into the injection groove 15, it will also push the piston of the syringe 16, and inject the anti-seepage liquid in the syringe 16 into the threaded gap between the threaded connector 5 and the first threaded sleeve 3 and between the threaded connector 5 and the second threaded sleeve 4 through the injection channel 17 to stop leakage and prevent leakage.

[0034] It should be noted that, in this article, relational terms such as second and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connection structure of a high ring stiffness composite pipe, comprising a first pipe connection end (1) and a second pipe connection end (2), characterized in that: The first pipe connection end (1) is provided with a first threaded sleeve (3) on its outer sleeve, the second pipe connection end (2) is provided with a second threaded sleeve (4) on its outer sleeve, a threaded connector (5) is provided between the first pipe connection end (1) and the second pipe connection end (2), and the first threaded sleeve (3) and the second threaded sleeve (4) are respectively connected to the threaded connector (5) via threads; The first threaded sleeve (3) and the second threaded sleeve (4) are each movably connected to a rotating circle (9), wherein a plurality of double-headed pins (10) are inserted into the rotating circle (9), and a push spring (11) is arranged on one side of the double-headed pin (10). The threaded connector (5) is provided with a plurality of spring grooves (12) around it, and a pressure spring (13) is arranged in the spring groove (12). A group of spring pressure blocks (14) are arranged at each end of the pressure spring (13). The first threaded sleeve (3) and the second threaded sleeve (4) are each provided with a plurality of injection grooves (15), and a syringe (16) is inserted into the injection grooves (15). The ends of the injection grooves (15) are provided with injection channels (17) connected to the inner threads of the first threaded sleeve (3) and the second threaded sleeve (4), and a constant pressure baffle (18) is arranged at the opening of the injection groove (15).

2. The connection structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The first pipe connection end (1) is provided with a first retaining ring (101), the diameter of the first retaining ring (101) is greater than the minimum inner diameter of the first threaded sleeve (3), and the second pipe connection end (2) is provided with a second retaining ring (201), the diameter of the second retaining ring (201) is greater than the minimum inner diameter of the second threaded sleeve (4).

3. The connection structure of a high ring stiffness composite pipe according to claim 1, characterized in that: A first sealing ring (6) is provided between the first pipe connection end (1) and the threaded connection head (5), and a second sealing ring (7) is provided between the second pipe connection end (2) and the threaded connection head (5).

4. The connection structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The rotating ring (9) is rotationally connected to the first threaded sleeve (3) and the second threaded sleeve (4) via a rotating clamping block (8).

5. The connection structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The syringe (16) contains an impermeable liquid, and the tip of the syringe (16) is inserted into the injection groove (15) with the tip facing inward, and the tip opening of the syringe (16) is connected to the injection channel (17).

6. The connection structure of a high ring stiffness composite pipe according to claim 1, characterized in that: The constant pressure baffle (18) is embedded in the opening of the liquid injection groove (15), and a center piece (1801) is arranged at the center of the constant pressure baffle (18), and prefabricated rupture lines (1802) are processed around the center piece (1801). The diameter of the center piece (1801) is smaller than the diameter of the liquid injection groove (15), and the diameter of the center piece (1801) is larger than the diameter of the double-headed pin (10).

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