A large-diameter natural gas pipeline elbow and its usage method

Abstract

This invention relates to the field of pipeline technology, specifically to a large-diameter natural gas pipeline elbow and its usage method. It includes a first flange and a second flange fixedly installed at the end of the pipeline. The first flange has four first grooves evenly spaced on its upper end, and the second flange has four second grooves evenly spaced on its upper end. A locking mechanism for fixing the second flange is installed at the bottom of each of the four first grooves. Four strip-shaped grooves are evenly spaced on the side wall of the second flange, and a control mechanism for controlling the retraction of the locking mechanism is slidably installed inside each of the four strip-shaped grooves. This invention utilizes a first fixing rod, a first rotating rod, and a first spring. By inserting the first fixing rod and the first rotating rod into the second grooves and rotating them, the first rotating rod is springed open under the elastic force of the first spring, and the locking mechanism of the first rotating rod engages with the strip-shaped grooves, thus fixing the first flange and the second flange.

Description

Technical Field

[0001] This invention relates to the field of pipeline technology, specifically to a large-diameter natural gas pipeline elbow and its usage method. Background Technology

[0002] Natural gas pipelines are pipelines that transport natural gas from extraction sites or processing plants to urban gas distribution centers or industrial users; they are also known as gas transmission pipelines.

[0003] A flange connection is a mechanical assembly that connects two pipes or other equipment together. Each pipe is first fixed to a flange, a gasket is placed between the two flanges, and they are then tightened together with bolts to complete the connection. Some pipe fittings and equipment already have built-in flanges, which also fall under the category of flange connections. Flange connections are an important connection method in pipeline construction. Flange connections are convenient to use and can withstand relatively high pressure.

[0004] Flange connections are widely used in industrial pipelines. In natural gas pipeline bends, flanges are ubiquitous for easy connection between pipes. However, since bolts are typically used to fasten two flanges together, the nuts are susceptible to corrosion and oxidation, resulting in a less than tight connection between the flanges. Furthermore, rusted bolts are difficult to remove, causing problems for construction workers.

[0005] Therefore, a large-diameter natural gas pipeline elbow and its usage method are proposed. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a large-diameter natural gas pipeline elbow and its usage method. The technical problem to be solved by the present invention is that when transporting natural gas, the existing natural gas pipelines will have gaps at the pipe joints due to the compression of the gas, resulting in natural gas leakage.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a large-diameter natural gas pipeline elbow and its usage method, comprising a first flange and a second flange fixedly installed at the end of the pipeline, wherein the upper end of the first flange is provided with four first grooves at equal intervals, and the upper end of the second flange is provided with four second grooves at equal intervals, wherein the bottom of each of the four first grooves is provided with a snap-fit ​​mechanism fixed to the second flange, and the side wall of the second flange is provided with four strip grooves at equal intervals, wherein the interior of each of the four strip grooves is provided with a control mechanism for controlling the retraction of the snap-fit ​​mechanism, wherein the middle part of the first flange is provided with a first interface, and the middle part of the second flange is provided with a second interface, and the first interface and the second interface are snap-fitted by a fixing component;

[0008] The snap-fit ​​mechanism includes a first fixed rod fixedly installed at the bottom of the first groove, a first rotating shaft rotatably installed on the side wall of the first groove, a first rotating rod fixedly installed on the first rotating shaft, a first spring fixedly connected to one side of the first rotating rod, and one end of the first spring fixedly connected to the first fixed rod.

[0009] In a preferred embodiment, the control mechanism includes a control block slidably mounted inside a strip groove. A first sliding groove is formed on one side of the control block. A second rotating shaft is rotatably connected to the side wall of the cavity inside the control block. A second rotating rod is fixedly connected to the second rotating shaft. One end of the second rotating rod passes through the first sliding groove and extends to the outside of the control block. A second spring is fixedly connected to the bottom of the second rotating rod. One end of the second spring is fixedly connected to the bottom of the cavity inside the control block. A locking rod is fixedly mounted on the upper end of the second rotating rod. A second sliding groove is formed on the top of the control block. The top end of the locking rod passes through the second sliding groove and extends to the outside of the control block. A locking groove is formed on the side wall of the strip groove.

[0010] In a preferred embodiment, the fixing component includes a second fixing rod, a third groove is provided on the inner side of the first interface, and one end of the second fixing rod is fixedly installed at the bottom of the third groove. Four L-shaped grooves are provided at equal intervals on the side wall of the second interface.

[0011] In a preferred embodiment, both the first flange and the second flange are made of fiberglass.

[0012] In a preferred embodiment, both the first fixed rod and the first rotating rod are made of Mn steel.

[0013] In a preferred embodiment, the first rotating rod is configured as an L-shaped structure, and the length of the first rotating rod is equal to the depth of the second groove.

[0014] How to use a large-diameter natural gas pipeline elbow:

[0015] S1. After the first fixed rod and the first rotating rod are inserted into the second groove and rotated, the first rotating rod is springed open under the elastic force of the first spring. The buckle of the first rotating rod engages with the strip groove, the second interface is inserted into the interior of the first interface, and the second fixed rod inside the first interface passes through the L-shaped groove on the second interface, so that the first interface and the second interface are tightly engaged.

[0016] S2. Under S1, push the control block to slide, squeeze the first rotating rod, and cause the first rotating rod to retract. Under the elastic force of the second spring, the second rotating rod bounces up and drives the locking rod to insert into the slot to form a fixed position. Press the second rotating rod to make the locking rod disengage from the slot and pull the control block outward, so that the first fixing rod forms a locking position again.

[0017] S3. Finally, the second interface is inserted into the first interface. The second fixing rod inside the first interface passes through the L-shaped groove on the second interface, so that the first interface and the second interface are fixed and sealed.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This invention utilizes a mechanism consisting of a first fixed rod, a first rotating rod, and a first spring. The first fixed rod and the first rotating rod are inserted into the second groove and rotated. Under the elastic force of the first spring, the first rotating rod is springed open, and its latch engages with the strip groove. The second interface is then inserted into the interior of the first interface. The second fixed rod inside the first interface passes through the L-shaped groove on the second interface, ensuring a tight fit between the first and second interfaces. This fixes the first flange and the second flange, preventing them from wobbling and creating a gap between them, which could lead to natural gas leakage.

[0020] 2. This invention utilizes a control block, a first sliding groove, and a second rotating shaft. By pushing the control block to slide, the first rotating rod is compressed, causing it to retract. Under the elastic force of a second spring, the second rotating rod springs up and drives a locking rod to insert into a locking groove for fixation. Pressing the second rotating rod causes the locking rod to disengage from the locking groove and pulls the control block outward, allowing the first fixing rod to engage again. This achieves automatic fitting and fixation at the pipe ends, preventing gaps between pipes and thus gas leaks. Furthermore, by inserting a second interface into the first interface, the second fixing rod inside the first interface passes through an L-shaped groove on the second interface, achieving fixation and sealing between the first and second interfaces. This further ensures a proper fit between the first and second flanges, preventing gaps at the pipe connection ends. Attached Figure Description

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a perspective view of the first flange of the present invention;

[0023] Figure 3 This is a perspective view of the second flange of the present invention;

[0024] Figure 4 This is a top sectional view of the first flange of the present invention;

[0025] Figure 5 This is a top sectional view of the second flange of the present invention;

[0026] Figure 6 This is a front sectional view of the first flange of the present invention;

[0027] Figure 7This is a front sectional view of the second flange of the present invention;

[0028] Figure 8 This is an enlarged view of the structure at point A of the present invention;

[0029] Figure 9 This is an enlarged view of the structure at point B of the present invention.

[0030] In the diagram: 1. First flange; 2. Second flange; 3. First groove; 4. First fixing rod; 5. First rotating shaft; 6. First rotating rod; 7. First spring; 8. Second groove; 9. Strip groove; 10. First interface; 11. Third groove; 12. Second fixing rod; 13. Second interface; 14. L-shaped groove; 15. Control block; 16. First slide groove; 17. Second rotating shaft; 18. Second rotating rod; 19. Second spring; 20. Locking rod; 21. Second slide groove; 22. Locking slot. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The large-diameter natural gas pipeline elbow and its usage method involved in the present invention are not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Reference Figures 1-7 This invention provides a large-diameter natural gas pipeline elbow and its usage method, including a first flange 1 and a second flange 2 fixedly installed at the end of the pipeline. The upper end of the first flange 1 is provided with four first grooves 3 at equal intervals, and the upper end of the second flange 2 is provided with four second grooves 8 at equal intervals. The bottom of each of the four first grooves 3 is provided with a snap-fit ​​mechanism fixed to the second flange 2. The side wall of the second flange 2 is provided with four strip grooves 9 at equal intervals. The inside of each of the four strip grooves 9 is slidably installed with a control mechanism for controlling the retraction of the snap-fit ​​mechanism. The middle part of the first flange 1 is provided with a first interface 10, and the middle part of the second flange 2 is provided with a second interface 13. The first interface 10 and the second interface 13 are snap-fitted by a fixing component.

[0033] The snap-fit ​​mechanism includes a first fixed rod 4 fixedly installed at the bottom of the first groove 3, a first rotating shaft 5 rotatably installed on the side wall of the first groove 3, a first rotating rod 6 fixedly installed on the first rotating shaft 5, a first spring 7 fixedly connected to one side of the first rotating rod 6, and one end of the first spring 7 fixedly connected to the first fixed rod 4.

[0034] Compared with the prior art, the present invention, by setting up a first fixing rod 4, a first rotating rod 6, a first spring 7 and other mechanisms, utilizes the first fixing rod 4 and the first rotating rod 6 to insert into the second groove 8 and rotate them. Under the elastic force of the first spring 7, the first rotating rod 6 is springed open, and the buckle of the first rotating rod 6 engages with the strip groove 9. The second interface 13 is engaged into the interior of the first interface 10. The second fixing rod 12 inside the first interface 10 passes through the L-shaped groove 14 on the second interface 13, so that the first interface 10 and the second interface 13 are tightly engaged, thereby fixing the first flange 1 and the second flange 2 and preventing the first interface 10 and the second interface 13 from shaking, which would cause a gap between the first flange 1 and the second flange 2 and lead to natural gas leakage.

[0035] Reference Figure 8 , Figure 9 The control mechanism includes a control block 15 slidably installed inside the strip groove 9. A first slide groove 16 is provided on one side of the control block 15. A second rotating shaft 17 is rotatably connected to the side wall of the cavity inside the control block 15. A second rotating rod 18 is fixedly connected to the second rotating shaft 17. One end of the second rotating rod 18 passes through the first slide groove 16 and extends to the outside of the control block 15. A second spring 19 is fixedly connected to the bottom of the second rotating rod 18. One end of the second spring 19 is fixedly connected to the bottom of the cavity inside the control block 15. A locking rod 20 is fixedly installed at the upper end of the second rotating rod 18. A second slide groove 21 is provided at the top of the control block 15. The top end of the locking rod 20 passes through the second slide groove 21 and extends to the outside of the control block 15. A locking groove 22 is provided on the side wall of the strip groove 9.

[0036] In this embodiment, the present invention uses a control block 15, a first sliding groove 16, and a second rotating shaft 17 to push the control block 15 to slide, which squeezes the first rotating rod 6, causing the first rotating rod 6 to retract. Under the elastic force of the second spring 19, the second rotating rod 18 springs up and drives the locking rod 20 to insert into the locking groove 22 to form a fixation. Pressing the second rotating rod 18 causes the locking rod 20 to disengage from the locking groove 22 and pulls the control block 15 outward, so that the first fixing rod 4 can be locked again, realizing automatic fitting and fixation at the pipe end, preventing gaps between pipes and causing gas leakage.

[0037] Reference Figure 3 , Figure 5 , Figure 7 The fixing component includes a second fixing rod 12, a third groove 11 is provided on the inner side of the first interface 10, and one end of the second fixing rod 12 is fixedly installed at the bottom of the third groove 11. Four L-shaped grooves 14 are provided at equal intervals on the side wall of the second interface 13.

[0038] In this embodiment of the application, the present invention uses a mechanism such as a second fixing rod 12, a first interface 10, and a third groove 11 to fix and seal the first interface 10 and the second interface 13 by inserting the second interface 13 into the first interface 10 and the second fixing rod 12 inside the first interface 10 passing through the L-shaped groove 14 on the second interface 13. This further ensures the fit between the first flange 1 and the second flange 2 and avoids gaps at the pipe connection ends.

[0039] Reference Figure 1 Both the first flange 1 and the second flange 2 are made of fiberglass.

[0040] In this embodiment of the application, fiberglass, namely reinforced plastic with glass fiber or its products as reinforcing material, is lightweight and hard, non-conductive, stable in performance, high in mechanical strength, low in recyclability, corrosion resistant, can withstand large strain, has viscoelasticity and elastoplasticity, and is a tough material.

[0041] Reference Figure 2 Both the first fixed rod 4 and the first rotating rod 6 are made of 16Mn steel.

[0042] In this embodiment, 16Mn steel is called low-alloy high-strength structural steel, which has good comprehensive performance, good low-temperature performance, good cold stamping performance, good welding performance and machinability, high strength and corrosion resistance.

[0043] Reference Figure 2 , Figure 5 The first rotating rod 6 is designed with an L-shaped structure, and the length of the first rotating rod 6 is equal to the depth of the second groove 8.

[0044] How to use a large-diameter natural gas pipeline elbow:

[0045] S1. After the first fixing rod 4 and the first rotating rod 6 are inserted into the second groove 8 and rotated, the first rotating rod 6 is springed open under the elastic force of the first spring 7. The buckle of the first rotating rod 6 engages with the strip groove 9, and the second interface 13 is inserted into the interior of the first interface 10. The second fixing rod 12 inside the first interface 10 passes through the L-shaped groove 14 on the second interface 13, so that the first interface 10 and the second interface 13 are tightly engaged.

[0046] S2. Under S1, push the sliding of the control block 15 to squeeze the first rotating rod 6, causing the first rotating rod 6 to retract. Under the elastic force of the second spring 19, the second rotating rod 18 springs up and drives the locking rod 20 to insert into the slot 22 to form a fixed position. Press the second rotating rod 18 to make the locking rod 20 disengage from the slot 22 and pull the control block 15 outward, so that the first fixing rod 4 forms a locking position again.

[0047] S3. Finally, the second interface 13 is inserted into the first interface 10. The second fixing rod 12 inside the first interface 10 passes through the L-shaped groove 14 on the second interface 13, so that the first interface 10 and the second interface 13 are fixed and sealed.

[0048] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0049] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0050] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-diameter natural gas pipeline elbow, comprising a first flange (1) and a second flange (2) fixedly installed at the end of the pipeline, characterized in that: The upper end of the first flange (1) is provided with four first grooves (3) at equal intervals, and the upper end of the second flange (2) is provided with four second grooves (8) at equal intervals. The bottom of each of the four first grooves (3) is provided with a snap-fit ​​mechanism that is fixed to the second flange (2). The side wall of the second flange (2) is provided with four strip grooves (9) at equal intervals. The inside of each of the four strip grooves (9) is provided with a control mechanism for controlling the retraction of the snap-fit ​​mechanism. The middle part of the first flange (1) is provided with a first interface (10), and the middle part of the second flange (2) is provided with a second interface (13). The first interface (10) and the second interface (13) are snap-fitted by a fixing component. The snap-fit ​​mechanism includes a first fixed rod (4) fixedly installed at the bottom of the first groove (3), a first rotating shaft (5) rotatably installed on the side wall of the first groove (3), a first rotating rod (6) fixedly installed on the first rotating shaft (5), a first spring (7) fixedly connected to one side of the first rotating rod (6), and one end of the first spring (7) fixedly connected to the first fixed rod (4). The control mechanism includes a control block (15) slidably installed inside the strip groove (9). A first slide groove (16) is provided on one side of the control block (15). A second rotating shaft (17) is rotatably connected to the side wall of the cavity inside the control block (15). A second rotating rod (18) is fixedly connected to the second rotating shaft (17). One end of the second rotating rod (18) passes through the first slide groove (16) and extends to the outside of the control block (15). A second spring (19) is fixedly connected to the bottom of the second rotating rod (18). One end of the second spring (19) is fixedly connected to the bottom of the cavity inside the control block (15). A locking rod (20) is fixedly installed at the upper end of the second rotating rod (18). A second slide groove (21) is provided at the top of the control block (15). The top end of the locking rod (20) passes through the second slide groove (21) and extends to the outside of the control block (15). A locking groove (22) is provided on the side wall of the strip groove (9).

2. The large-diameter natural gas pipeline elbow according to claim 1, characterized in that: The fixing component includes a second fixing rod (12), a third groove (11) is provided on the inner side of the first interface (10), and one end of the second fixing rod (12) is fixedly installed at the bottom of the third groove (11). Four L-shaped grooves (14) are provided at equal intervals on the side wall of the second interface (13).

3. The large-diameter natural gas pipeline elbow according to claim 1, characterized in that: The first flange (1) and the second flange (2) are both made of fiberglass.

4. A large-diameter natural gas pipeline elbow according to claim 1, characterized in that: The first fixed rod (4) and the first rotating rod (6) are both made of 16Mn steel.

5. A large-diameter natural gas pipeline elbow according to claim 1, characterized in that: The first rotating rod (6) is designed as an L-shaped structure, and the length of the first rotating rod (6) is equal to the depth of the second groove (8).

6. The method of using a large-diameter natural gas pipeline elbow according to any one of claims 1 to 5, characterized in that: S1. After the first fixed rod (4) and the first rotating rod (6) are inserted into the second groove (8) and rotated, the first rotating rod (6) is springed open under the elastic force of the first spring (7). The buckle of the first rotating rod (6) engages with the strip groove (9). The second interface (13) is inserted into the interior of the first interface (10). The second fixed rod (12) inside the first interface (10) passes through the L-shaped groove (14) on the second interface (13), so that the first interface (10) and the second interface (13) are tightly engaged. S2. Under S1, push the control block (15) to slide, squeeze the first rotating rod (6), so that the first rotating rod (6) retracts. Under the elastic force of the second spring (19), the second rotating rod (18) springs up and drives the locking rod (20) to insert into the slot (22) to form a fixed position. Press the second rotating rod (18) to make the locking rod (20) disengage from the slot (22) and pull the control block (15) outward, so that the first fixing rod (4) forms a locking position again. S3. Finally, the second interface (13) is inserted into the first interface (10). The second fixing rod (12) inside the first interface (10) passes through the L-shaped groove (14) on the second interface (13), so that the first interface (10) and the second interface (13) are fixed and sealed.

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