Threaded butt joint assembly for vacuum heat insulation and heat preservation pipe

Abstract

The utility model relates to a vacuum heat insulation pipe thread butt joint assembly which comprises a first connector, a second connector and a connecting cylinder and is characterized in that the first connector and the second connector are symmetrical in structure and respectively comprise an outer ring, an inner ring, a connecting rib set and an annular baffle, a groove is formed in the outer end face of the annular baffle, and a sealing gasket is arranged in the groove. The connecting cylinder is composed of a first connecting ring, a clamping ring arranged on the peripheral face of the first connecting ring and a second connecting ring capable of rotating relative to the first connecting ring, the peripheral face of the first connecting ring is sleeved with the front section of the second connecting ring, and an annular groove corresponding to the clamping ring is formed in the inner wall of the second connecting ring. The inner diameter of the rear section of the second connecting ring is equal to that of the first connecting ring, the second connecting ring and the first connecting ring are respectively provided with internal threads, the internal threads of the first connecting ring are connected with the external threads of the first connector, and the internal threads of the second connecting ring are connected with the external threads of the second connector. The thermal insulation pipe butt joint device solves the problems that time and labor are wasted and sealing performance is poor during thermal insulation pipe butt joint operation, and achieves rapid installation and leakage prevention.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal insulation pipes, in particular to a vacuum thermal insulation pipe threaded butt joint assembly. Background Art

[0002] Vacuum insulated pipes typically consist of an inner and outer tube. The annular cavity between the two tubes is evacuated and then filled with inert gas or insulating material to maintain insulation and prevent condensation of the transported material in cold weather, which could block the pipe. Because the length of a single vacuum insulated pipe is less than the depth of an oil or water well, a docking assembly is required to connect multiple pipes in practice.

[0003] For example, CN 218063975 U discloses a threaded butt joint assembly for a vacuum insulated thermal insulation pipe, which includes a first pair of joints, a second pair of joints, and a threaded butt joint steel ring, all of which are annular and coaxially arranged. The first pair of joints includes a first inner ring, a first outer ring, and a first thermal insulation sealing ring. The second pair of joints includes a second inner ring, a second outer ring, and a second thermal insulation sealing ring. The first outer ring is sleeved on the outside of the first inner ring and the first thermal insulation sealing ring is provided between the first inner ring and the second inner ring. The second outer ring is sleeved on the outside of the second inner ring and the second thermal insulation sealing ring is provided between the second inner ring and the second inner ring. The first inner ring abuts the second inner ring, and the first outer ring abuts the second outer ring. The outer ring side walls of the first and second outer rings are respectively provided with a first butt joint thread and a second butt joint thread. The butt joint assembly is connected to the first and second pair of joints respectively through the threaded butt joint steel ring, which is intended to facilitate fast and effective on-site construction. However, the following problems still exist during use: 1. The threaded butt steel ring is connected to the first pair of joints on one insulation pipe, and then connected to the second pair of joints on another insulation pipe. The insulation pipe needs to be rotated to achieve threaded butt connection, which is time-consuming and labor-intensive; 2. The sealing of the butt joint is poor, which can easily lead to leakage. Utility Model Content

[0004] The purpose of the utility model is to provide a vacuum insulation pipe threaded butt joint assembly with a reasonable structure and reliable use, which solves the problems of time-consuming and labor-intensive butt joint operation and poor sealing of insulation pipes, and realizes rapid installation and leakage prevention while ensuring the insulation performance.

[0005] The technical solution of the utility model is:

[0006] A vacuum insulation pipe threaded docking assembly includes a first joint, a second joint and a connecting tube. The technical points are: the first joint and the second joint are symmetrical in structure, respectively including an outer ring with an external thread, an inner ring concentric with the outer ring, a connecting rib group connected between the outer ring and one end of the inner ring, and an annular baffle connected between the outer ring and the other end of the inner ring, the outer end surface of the annular baffle is provided with a groove and the groove is provided with a sealing gasket, the upper surface of the sealing gasket is higher than the upper edge of the groove, the connecting tube consists of a first connecting ring, a clamping ring provided on the outer peripheral surface of the first connecting ring, and a second connecting ring rotatable relative to the first connecting ring, the front section of the second connecting ring is sleeved on the outer peripheral surface of the first connecting ring and its inner wall is provided with an annular groove corresponding to the clamping ring, the rear section of the second connecting ring has an inner diameter equal to the inner diameter of the first connecting ring and is respectively provided with an internal thread, the internal thread of the first connecting ring is connected to the external thread of the first joint, the internal thread of the second connecting ring is connected to the external thread of the second joint, and the sealing gaskets on the annular baffles of the first joint and the second joint are relative and squeezed together.

[0007] In the above-mentioned vacuum insulation pipe threaded docking assembly, the outer edge of the upper surface of the sealing gasket extends to the edge of the outer ring, and the inner edge of the upper surface of the sealing gasket extends to the inner edge of the annular baffle.

[0008] In the above-mentioned vacuum insulation pipe threaded butt joint assembly, the connecting rib group includes a plurality of connecting ribs, and each connecting rib is evenly distributed around the center line of the outer ring.

[0009] In the above-mentioned vacuum heat-insulating pipe threaded docking assembly, the annular space between the outer ring and the inner ring is connected to the vacuum chamber of the insulation pipe.

[0010] The beneficial effects of the utility model are:

[0011] 1. When in use, the first connecting ring and the second connecting ring of the connecting tube can rotate relative to each other, which is more convenient for connecting with the insulation pipe welded with the first joint and the second joint, solving the problem of time-consuming and labor-intensive docking operation of the insulation pipe, and realizing quick installation. At the same time, the annular space between the outer ring and the inner ring of the first joint and the second joint is connected to the vacuum chamber of the insulation pipe, and can be injected with inert gas or thermal insulation material like the vacuum chamber, thereby ensuring the thermal insulation performance of the docking position.

[0012] 2. The sealing gaskets on the annular baffles of the first joint and the second joint are relative and squeezed together, ensuring the sealing of the docking position, with strong sealing performance, to prevent leakage of the transmission medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the use structure of the utility model;

[0014] Figure 2 yes Figure 1 Middle AA section view.

[0015] In the figure: 1. outer tube, 2. first connecting ring, 3. clamping ring, 4. second connecting ring, 5. outer ring, 6. inner ring, 7. connecting rib group, 8. inner tube, 9. annular baffle, 10. sealing gasket. DETAILED DESCRIPTION

[0016] The utility model is described in detail according to the accompanying drawings.

[0017] like Figure 1 、 Figure 2 As shown, the vacuum insulation pipe threaded butt joint assembly includes a first joint, a second joint and a connecting tube.

[0018] Among them, the first joint and the second joint are symmetrical in structure, and respectively include an outer ring 5 with external threads, an inner ring 6 concentric with the outer ring 5, a connecting rib group 7 connected between one end of the outer ring 5 and the inner ring 6, and an annular baffle 9 connected between the other end of the outer ring 5 and the inner ring 6.

[0019] The outer end surface of the annular baffle 9 is provided with a groove, and the groove is provided with a sealing gasket 10. The upper surface of the sealing gasket 10 is higher than the upper edge of the groove. In this embodiment, the outer edge of the upper surface of the sealing gasket 10 extends to the edge of the outer ring 5, and the inner edge of the upper surface of the sealing gasket 10 extends to the inner edge of the annular baffle 9. The connecting tube is composed of a first connecting ring 2, a retaining ring 3 provided on the outer peripheral surface of the first connecting ring 2, and a second connecting ring 4 that can rotate relative to the first connecting ring 2. The front section of the second connecting ring 4 is sleeved on the outer peripheral surface of the first connecting ring 2, and its inner wall is provided with an annular groove corresponding to the retaining ring 3. The inner diameter of the rear section of the second connecting ring 4 is equal to the inner diameter of the first connecting ring 2 and is provided with an internal thread. The internal thread of the first connecting ring 2 is connected to the external thread of the outer ring 5 of the first joint, and the internal thread of the second connecting ring 4 is connected to the external thread of the outer ring 5 of the second joint. The sealing gaskets 10 on the annular baffles 9 of the first joint and the second joint are opposite and squeezed together.

[0020] In this embodiment, the connecting rib group 7 includes a plurality of connecting ribs, each of which is evenly distributed around the center line of the outer ring. The annular space between the outer ring 5 and the inner ring 6 is connected to the vacuum chamber of the insulation pipe 1.

[0021] Working principle:

[0022] 1. When in use, the first and second joints are welded to the front and rear ends of the outer tube 1 and inner tube 8 of the insulation pipe, respectively, and the annular space between the outer ring 5 and the inner ring 6 is connected to the vacuum chamber of the insulation pipe. The vacuum chamber of the insulation pipe is evacuated and injected with inert gas.

[0023] 2. The connecting tube is screwed and fixed with the outer ring 5 of the second joint of the first insulation pipe using the first connecting ring 2. The second connecting ring 4 of the connecting tube is rotated to rotate and fix it with the outer ring 5 of the first joint of the second insulation pipe. The sealing gaskets 10 on the first joint and the second joint are opposite and squeezed together to achieve sealing.

[0024] The above detailed description of the embodiments of the present invention is intended to be a preferred embodiment of the present invention and should not be construed as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the present invention shall still fall within the scope of this patent.

Claims

1. A vacuum insulation pipe threaded butt joint assembly, comprising a first joint, a second joint and a connecting tube, characterized in that: The first joint and the second joint have symmetrical structures, and respectively include an outer ring with an external thread, an inner ring concentric with the outer ring, a connecting rib group connected between one end of the outer ring and the inner ring, and an annular baffle connected between the other end of the outer ring and the inner ring. The outer end surface of the annular baffle is provided with a groove and the groove is provided with a sealing gasket. The upper surface of the sealing gasket is higher than the upper edge of the groove. The connecting tube consists of a first connecting ring, a clamping ring provided on the outer peripheral surface of the first connecting ring, and a second connecting ring that can rotate relative to the first connecting ring. The front section of the second connecting ring is sleeved on the outer peripheral surface of the first connecting ring and its inner wall is provided with an annular groove corresponding to the clamping ring. The inner diameter of the rear section of the second connecting ring is equal to the inner diameter of the first connecting ring and is respectively provided with an internal thread. The internal thread of the first connecting ring is connected to the external thread of the first joint, and the internal thread of the second connecting ring is connected to the external thread of the second joint. The sealing gaskets on the annular baffles of the first joint and the second joint are relative and squeezed together.

2. The vacuum insulation pipe threaded butt joint assembly according to claim 1, characterized in that: The outer edge of the upper surface of the sealing gasket extends to the edge of the outer ring, and the inner edge of the upper surface of the sealing gasket extends to the inner edge of the annular baffle.

3. The vacuum insulation pipe threaded butt joint assembly according to claim 1, characterized in that: The connecting rib group includes a plurality of connecting ribs, and each connecting rib is evenly distributed around the center line of the outer ring.

4. The vacuum insulation pipe threaded butt joint assembly according to claim 1, characterized in that: The annular space between the outer ring and the inner ring is communicated with the vacuum chamber of the thermal insulation pipe.

Images