Gas pipeline connection device

Abstract

The utility model discloses a gas pipeline connection device, including a first gas pipeline and a second gas pipeline, the first gas pipeline and the second gas pipeline are respectively slidably connected with a first center tube and a second center tube with equal inner diameter and outer diameter, the first center tube and the second center tube are both sleeved with a spring on one end outside the gas pipeline, the first center tube and the second center tube are respectively connected with a first funnel-shaped docking plate and a second docking plate with equal diameters on one end outside the gas pipeline, the inner diameter of the first docking plate is larger than the inner diameter of the first center tube; a connecting rod is respectively fixedly installed inside the first gas pipeline and the second gas pipeline, the connecting rod extends outside the gas pipeline, and a sealing plate is fixedly installed on one end of the connecting rod outside the gas pipeline, and the diameter of the sealing plate is equal to the inner diameter of the first center tube. Its purpose is to back-press the gas inside the center tube to achieve a better anti-leakage effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas equipment, and in particular relates to a gas pipeline connecting device. Background Art

[0002] Gas is a general term for gaseous fuels, mainly natural gas, artificial gas, liquefied petroleum gas, biogas and coal-to-gas, etc. The use of gas involves pipeline transportation, and gas is easy to spread, flammable and explosive. During the gas transportation process, sealing measures must be taken to avoid dangers caused by gas leakage.

[0003] The Chinese patent document with publication number CN113864547B discloses a "gas pipeline connection structure", which includes a self-sealing component, which is composed of two central tubes. During the disassembly process, the central tube is pushed out by a spring to block the vent hole on the side of the central tube, thus completing the pipeline self-sealing.

[0004] When the pipeline leaks or needs to be repaired, the connecting device is disassembled, but there is gas inside the center tube. The vent holes on the side are blocked, and the gas inside the center tube cannot be avoided from leaking into the air during the process of disassembling the pipeline. Utility Model Content

[0005] The utility model provides a gas pipeline connecting device, the purpose of which is to back-pressurize the gas inside the central tube to achieve a better anti-leakage effect.

[0006] The utility model is realized by the following technical solutions:

[0007] A gas pipeline connection device comprises a first gas pipeline and a second gas pipeline, wherein a first center tube and a second center tube having equal inner diameter and outer diameter are respectively slidably connected to the first gas pipeline and the second gas pipeline, wherein the first center tube and the second center tube are both sleeved with a spring on one end outside the gas pipeline, wherein the first center tube and the second center tube are respectively connected with a first funnel-shaped docking plate and a second docking plate having equal diameters on one end outside the gas pipeline, wherein the inner diameter of the first docking plate is larger than the inner diameter of the first center tube; wherein a connecting rod is respectively fixedly installed inside the first gas pipeline and the second gas pipeline, wherein the connecting rod extends outside the gas pipeline, and a sealing plate is fixedly installed on one end outside the gas pipeline, wherein the diameter of the sealing plate is equal to the inner diameter of the first center tube; wherein when the first center tube and the second center tube are in a compressed state, the two sealing plates are respectively located in the first docking plate and the second docking plate.

[0008] Furthermore, the first center tube and the second center tube are both connected to a limiting cavity at one end inside the gas pipeline, the limiting cavity is cylindrical, and the outer diameter of the limiting cavity is larger than the outer diameter of the first center tube; and a plurality of connecting ports are arranged on the limiting cavity.

[0009] Furthermore, the communication port is arranged on a surface where the limiting cavity is in communication with the first central tube.

[0010] Furthermore, sealing rings are respectively installed on the outer edges of the first docking plate and the second docking plate.

[0011] It also includes a fixing component, which includes a threaded platform and a connecting platform; the threaded platform is installed at the end of the first gas pipeline, the connecting platform is installed at the end of the second gas pipeline, and a locking ring that can rotate along the circumference of the connecting platform is installed on the outer side of the connecting platform; the locking ring is provided with an internal thread, and the threaded platform is provided with an external thread connected to the locking ring.

[0012] Furthermore, the threaded platform is provided with a through hole, and a plug is clamped in the through hole.

[0013] Furthermore, one end of the connecting rod located inside the gas pipeline is connected to a support plate, and a vent is provided on the support plate.

[0014] The technical solution of the utility model has at least the following beneficial effects:

[0015] During the disassembly of the connection device, the sealing plate is pushed inward from the outermost ends of the first central tube and the second central tube to push the gas back to the inside to avoid leakage. When connected, the inner diameters of the first docking plate and the second docking plate are larger than the outer diameter of the sealing plate, and the gas can be conducted along the outer side of the sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

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

[0018] Figure 2 It is a cross-sectional view of the connection device;

[0019] Figure 3 It is a cross-sectional view of the plugging of the connection device;

[0020] Figure 4 It is a limiting cavity.

[0021] Icons: 1-first gas pipeline, 2-second gas pipeline, 3-first center tube, 4-second center tube, 5-first docking plate, 6-second docking plate, 7-spring, 8-connecting rod, 81-sealing plate, 9-support plate, 10-limiting cavity, 101-connecting port, 11-threaded platform, 12-connecting platform, 13-locking ring, 14-plugging head. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings. Example 1

[0025] A gas pipeline connecting device, such as Figure 1As shown, it includes a first gas pipeline 1 and a second gas pipeline 2, the ends of the first gas pipeline 1 and the second gas pipeline 2 are blocked, and a first center tube 3 and a second center tube 4 are respectively installed on the blocked ends of the first gas pipeline 1 and the second gas pipeline 2, and the inner diameter and outer diameter of the first center tube 3 and the second center tube 4 are equal. The first center tube 3 is slidably connected to the first gas pipeline 1 along the axial direction of the first gas pipeline 1, and the second center tube 4 is slidably connected to the second gas pipeline 2 along the axial direction of the second gas pipeline 2. A spring 7 is sleeved on one end of the first center tube 3 located outside the gas pipeline, one end of the spring 7 is connected to the first center tube 3, and the other end of the spring 7 is connected to the first gas pipeline 1. Another spring 7 is sleeved on one end of the second center tube 4 located outside the gas pipeline, one end of the spring 7 is connected to the second center tube 4, and the other end of the spring 7 is connected to the second gas pipeline 2. The first center tube 3 and the second center tube 4 are respectively connected to a first docking plate 5 and a second docking plate 6 of equal diameters at one end located outside the gas pipeline. The first docking plate 5 and the second docking plate 6 are funnel-shaped, and the inner diameter of the first docking plate 5 is larger than the inner diameter of the first center tube 3. A connecting rod 8 is fixedly installed inside the first gas pipeline 1 and the second gas pipeline 2 through a support plate 9 with a vent, and the connecting rod 8 extends outside the gas pipeline. A sealing plate 81 is fixedly installed on one end of the connecting rod 8 located outside the gas pipeline, and the diameter of the sealing plate 81 is equal to the inner diameter of the first center tube 3; when the first center tube 3 and the second center tube 4 are in a compressed state, the two sealing plates 81 are respectively located in the first docking plate 5 and the second docking plate 6.

[0026] Figure 1 The gas pipeline connection device shown is in a connected state, the spring 7 is compressed, the first center tube 3 and the second center tube 4 are pushed into the first gas pipeline 1 and the second gas pipeline 2 respectively under the condition of being squeezed, and the two sealing plates 81 are respectively located in the first docking plate 5 and the second docking plate 6. The inner diameter of the funnel-shaped first docking plate 5 and the second docking plate 6 is larger than the outer diameter of the sealing plate 81, so the gas can be conducted along the edge of the sealing plate 81. During the dismantling process, the first gas pipeline 1 and the second gas pipeline 2 are separated, the first docking plate 5 and the second docking plate 6 are always in contact with each other under the action of the spring 7, and the sealing plate 81 moves in the opposite direction relative to the first center tube 3 and the second center tube 4, moves to the inside of the first center tube 3 and the second center tube 4, and blocks the first center tube 3 and the second center tube 4. And the sealing plate 81 blocks the first center tube 3 and the second center tube 4 from the outermost end, and the sealing plate 81 pushes the gas in the first center tube 3 and the second center tube 4 inward during the movement process to prevent leakage. When the gas leakage is finally disassembled, it is greatly reduced.

[0027] The first center tube 3 and the second center tube 4 are both connected to a limiting cavity 10 at one end inside the gas pipeline. The limiting cavity 10 is cylindrical, and the outer diameter of the limiting cavity 10 is larger than the outer diameter of the first center tube 3. The limiting cavity 10 is provided with a plurality of connecting ports 101, and the connecting ports 101 are arranged on the side where the limiting cavity 10 is connected to the first center tube 3. The limiting cavity 10 is used to limit the moving distance of the first center tube 3 and the second center tube 4. During the process of the two sealing plates 81 departing from the first docking plate 5 and the second docking plate 6, a negative pressure state will be formed in the space therein. If the negative pressure is too large, it will increase the difficulty of the final disassembly. After the limiting cavity 10 limits the moving distance, the above situation is avoided. Secondly, the connecting port 101 is arranged on the side where the limiting cavity 10 is connected to the first center tube 3. Under the thrust of the spring 7, the limiting cavity 10 finally fits the end of the first gas pipeline 1 or the second gas pipeline 2, so that the connecting port 101 is closed, thereby enhancing the blocking effect.

[0028] Sealing rings are respectively installed on the outer edges of the first docking tray 5 and the second docking tray 6. The sealing rings are used to increase air tightness. Secondly, since negative pressure is formed in the internal space of the first docking tray 5 and the second docking tray 6 during the disassembly process, the sealing rings themselves can produce a certain deformation to adjust the internal space and reduce the negative pressure state.

[0029] Furthermore, it also includes a fixing component installed on the outside of the first gas pipeline 1 and the second gas pipeline 2, and the fixing component includes a threaded platform 11 and a connecting platform 12; the threaded platform 11 is installed at the end of the first gas pipeline 1, and the connecting platform 12 is installed at the end of the second gas pipeline 2, and a locking ring 13 that can rotate circumferentially along the connecting platform 12 is installed on the outside of the connecting platform 12; the locking ring 13 is provided with an internal thread, and the threaded platform 11 is provided with an external thread connected to the locking ring 13. After the first docking plate 5 and the second docking plate 6 are docked, the threaded platform 11 and the connecting platform 12 are aligned to complete the fixation. Secondly, the threaded platform 11 and the connecting platform 12 form a closed space, which wraps the first docking plate 5 and the second docking plate 6 to avoid possible leakage there, and pre-processing can be performed.

[0030] The threaded platform 11 is provided with a through hole, in which a plug 14 is clamped. The through hole is used for detection, and whether leakage has occurred in the confined space before disassembly. If leakage has occurred, the gas in the confined space can be extracted before disassembly to improve safety.

[0031] The side surfaces of the first docking tray 5 and the second docking tray 6 are arc-shaped, and the concave surfaces are located inside the first docking tray 5 and the second docking tray 6 .

[0032] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A gas pipeline connection device, comprising a first gas pipeline (1) and a second gas pipeline (2), wherein a first center tube (3) and a second center tube (4) having the same inner diameter and outer diameter are respectively slidably connected to the first gas pipeline (1) and the second gas pipeline (2), and a spring (7) is sleeved on one end of the first center tube (3) and the second center tube (4) outside the gas pipeline, wherein: The first central tube (3) and the second central tube (4) are located at one end outside the gas pipeline and are respectively connected to a first butt joint plate (5) and a second butt joint plate (6) of equal diameter in a funnel shape, the inner diameter of the first butt joint plate (5) being larger than the inner diameter of the first central tube (3); a connecting rod (8) is fixedly installed inside the first gas pipeline (1) and the second gas pipeline (2), respectively, the connecting rod (8) extending outside the gas pipeline, a sealing plate (81) is fixedly installed on one end of the connecting rod (8) located outside the gas pipeline, the diameter of the sealing plate (81) being equal to the inner diameter of the first central tube (3); when the first central tube (3) and the second central tube (4) are in a compressed state, the two sealing plates (81) are respectively located inside the first butt joint plate (5) and the second butt joint plate (6).

2. A gas pipeline connection device according to claim 1, characterized in that: The first center tube (3) and the second center tube (4) are both connected to a limiting cavity (10) at one end inside the gas pipeline; the limiting cavity (10) is cylindrical, and the outer diameter of the limiting cavity (10) is greater than the outer diameter of the first center tube (3); and a plurality of connecting ports (101) are provided on the limiting cavity (10).

3. A gas pipeline connection device according to claim 2, characterized in that: The communication port (101) is arranged on a surface of the limiting cavity (10) that is in communication with the first central tube (3).

4. A gas pipeline connection device according to claim 1, characterized in that: Sealing rings are respectively installed on the outer edges of the first docking plate (5) and the second docking plate (6).

5. A gas pipeline connection device according to claim 1, characterized in that: The invention also comprises a fixing assembly, wherein the fixing assembly comprises a threaded platform (11) and a connecting platform (12); the threaded platform (11) is installed at the end of the first gas pipeline (1), the connecting platform (12) is installed at the end of the second gas pipeline (2), and a locking ring (13) is installed on the outer side of the connecting platform (12) and can rotate along the circumference of the connecting platform (12); the locking ring (13) is provided with an internal thread, and the threaded platform (11) is provided with an external thread connected to the locking ring (13).

6. A gas pipeline connection device according to claim 5, characterized in that: The threaded platform (11) is provided with a through hole, and a plug (14) is clamped in the through hole.

7. A gas pipeline connection device according to claim 1, characterized in that: The side surfaces of the first docking tray (5) and the second docking tray (6) are arc-shaped, and the concave surfaces are located inside the first docking tray (5) and the second docking tray (6).

8. A gas pipeline connection device according to claim 1, characterized in that: The connecting rod (8) is located at one end inside the gas pipeline and is connected to a support plate (9), and a vent is provided on the support plate (9).

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