A field pipe quick coupling device without fire

Abstract

The utility model relates to the technical field of petroleum pipeline engineering discloses a kind of pipeline quick connecting device of field no fire, it includes cylinder, left side pipeline connecting mechanism and right side pipeline connecting mechanism;The inner wall middle part of cylinder is equipped with pipeline limiting piece in circumference;The left side pipeline connecting mechanism includes left sealing body, left gasket, left propulsion body, left locking block, left locking ring and left locking compression cap connected in sequence;The right side pipeline connecting mechanism includes right sealing body, right gasket, right propulsion body, right locking block, right locking ring and right locking compression cap connected in sequence.The utility model is combined structure by cylinder, left side pipeline connecting mechanism and right side pipeline connecting mechanism, and the two pipelines to be repaired are quickly connected, without fire, eliminate fire formalities expenditure, change high-risk operation into general operation, realize risk degradation, and guarantee oilfield safety production.

Description

Technical Field

[0001] This utility model relates to the field of oil pipeline engineering technology, specifically to a quick pipeline connection device that does not require on-site welding. Background Technology

[0002] Currently, when existing pipelines in gathering and transportation stations, oil well processes, and underground pipelines are damaged or need replacement, the connection methods typically involve fire welding and electric welding. These methods present the following problems during pipeline maintenance: First, if pipeline residue cannot be completely removed during welding, it can easily generate large amounts of smoke and open flames, posing risks of fire and explosion. Second, in small work areas, such as trenches, pits, or troughs, the confined space and poor airflow during welding exacerbate the harmful gases produced, posing a significant risk to workers. Third, on-site welding for pipeline connections in large stations and warehouses requires special-level hot work permits and reporting to fire departments at various levels, impacting operational efficiency.

[0003] Upon investigation, several patents related to oil pipeline connections were found, such as the utility model patent "An Oil Pipeline Connection Device" with publication number CN221402112U and application number CN202323069609.8. This device features an external connection and installation structure, including an oil pipe (first) and an oil pipe (second), as well as a connecting plate (first), a sealing ring gasket, a connecting frame, a threaded sleeve, a tightening screw, a handle, a chuck, a connecting plate (second), and an embedded groove. The right end of the oil pipe (first) is connected to the inner ring side of the left end of the connecting plate (first), and the outer ring side of the right end of the connecting plate (first) is connected to the left side of the sealing ring gasket. A set of connecting frames is connected to the middle of the upper and lower ends of the connecting plate (first). The inner side of the right end of each set of connecting frames is connected to the outer side of a set of threaded sleeves. The inner wall of the threaded sleeve is screwed to the outer wall of the tightening screw. The outer right end of the tightening screw is connected to the inner side of the handle, and the left side of the tightening screw is connected to the middle right side of the chuck. The left end of the oil pipe (second) is connected to the inner ring side of the right end of the connecting plate (second). An embedded groove is provided on the upper and lower sides of the right end of the connecting plate (second). Before installation, both sets of chucks are positioned on the right side within the connecting frame. During installation, connecting plate two is inserted from the front to the back, ensuring that connecting plate one and connecting plate two are completely horizontally aligned and that the chucks correspond to the insertion slots. Then, both sets of levers are turned to rotate the tightening screw. The tightening screw, through its engagement with the threaded sleeve, causes the chuck to rotate and move to the left, thus embedding it into the insertion slot until it is fully tightened. This ensures a sealed fit between connecting plate one and connecting plate two via the sealing ring gasket. Connected by the two sets of connecting frames, and secured by the threaded sleeve and tightening screw threads, an external connection and installation structure is provided. However, this utility model relies on connecting plates and tightening screws for fastening, which cannot effectively withstand pressure, is complex and cumbersome to install, and occupies a significant amount of space. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a quick-connection device for pipelines that does not require on-site welding, the technical solution of which is as follows: A non-flammable, on-site quick-connect pipe device includes a cylinder, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting component is circumferentially located in the middle of the inner wall of the cylinder. The pipe limiting component has a convex cross-section and includes a small limiting ring located inside and a large limiting ring located outside. The left-side pipe connection mechanism includes a left sealing body, a left gasket, a left pushing body, a left locking block, a left locking ring, and a left locking cap connected sequentially. The front end of the left pipe abuts against the left side of the small limiting ring, and the front end of the left sealing body abuts against the left side of the large limiting ring. The right-side pipe connection mechanism includes a right sealing body, a right gasket, a right pushing body, a right locking block, a right locking ring, and a right locking cap connected sequentially. The front end of the right pipe abuts against the right side of the small limiting ring, and the front end of the right sealing body abuts against the right side of the large limiting ring.

[0005] Furthermore, both the left and right sealing bodies are graphite sealing bodies.

[0006] Furthermore, both the left and right gaskets are carbon steel gaskets.

[0007] Furthermore, the left end of the cylinder is provided with a left internal thread, and the right end of the cylinder is provided with a right internal thread.

[0008] Furthermore, the front end of the left locking block is provided with a front external thread of the left locking block that engages with the left internal thread of the cylinder, and the rear end of the left locking block is provided with a rear external thread of the left locking block; the front end of the left locking cap is provided with an internal thread of the left locking cap that engages with the rear external thread of the left locking block.

[0009] Furthermore, the left locking block has a left rear annular groove at its rear end, and the left locking ring is open and has a front end that can extend into the left rear annular groove.

[0010] Furthermore, the front end of the right locking block is provided with a front external thread of the right locking block that engages with the right internal thread of the cylinder, and the rear end of the right locking block is provided with a rear external thread of the right locking block; the front end of the right locking cap is provided with an internal thread of the right locking cap that engages with the rear external thread of the right locking block.

[0011] Furthermore, the rear end of the right locking block is provided with a right rear annular groove, and the right locking ring is open and its front end is provided as a right front cone that can extend into the right rear annular groove.

[0012] Furthermore, both the left and right locking blocks are provided with locking block adjustment holes; Furthermore, both the left and right locking caps are provided with locking cap adjustment holes.

[0013] Compared with the prior art, the present invention mainly has the following beneficial technical effects: 1. This utility model uses a combination structure of a cylinder, a left-side pipe connection mechanism, and a right-side pipe connection mechanism to quickly connect two pipes to be repaired without the need for hot work, eliminating the expense of hot work permits, transforming high-risk operations into general operations, thereby reducing risk and ensuring safe production in the oilfield. 2. This utility model uses a combination structure of a cylinder, a left-side pipe connection mechanism, and a right-side pipe connection mechanism to quickly connect two pipes to be repaired without the need for open flame. This avoids the problems that pipe welding may encounter, such as the inability to remove pipe residues or incomplete removal, which can easily generate a large amount of smoke and open flames, and pose risks of fire and explosion. 3. This utility model uses a combination structure of a cylinder, a left-side pipe connection mechanism, and a right-side pipe connection mechanism to quickly connect two pipes to be repaired without the need for open flame. This avoids construction scenarios with small working surfaces, such as welding in trenches, troughs, or pits, where the confined space and poor airflow can cause harmful gases from welding to injure workers. 4. This utility model uses a combination structure of a cylinder, a left-side pipe connection mechanism, and a right-side pipe connection mechanism to quickly connect two pipes to be repaired without the need for hot work. This reduces the risk level of the direct operation to that of a general operation, avoiding the need for special-level hot work permits and various levels of reporting and fire duty for on-site welding at the collection and transportation station. The cumbersome approval and reporting procedures for pipe welding affect the efficiency of the operation. 5. This utility model uses a combination structure of a cylinder, a left-side pipe connection mechanism, and a right-side pipe connection mechanism to quickly connect two pipes to be repaired. Rotating the left and right locking caps presses the left and right locking rings into the left and right rear annular grooves to achieve a firm connection between the pipe to be repaired and the device. Rotating the left and right locking blocks pushes the left and right propulsion bodies, compressing the left and right sealing bodies to seal the gap between the cylinder and the pipe to be repaired. This avoids the problems of unreliable pipe connections, cumbersome prefabrication and welding processes, complex installation, long curing time, and large space occupation under conventional non-welding conditions. 6. This utility model uses a cold cutting method in pipeline connection operations. The pipe section to be repaired is inserted into the inner cavity of the connection device. The locking block is rotated to push the propulsion body and compress the sealing body to achieve a gap seal between the cylinder and the pipe to be repaired. The locking cap is rotated to press the locking ring into the annular groove to achieve a firm connection between the pipe to be repaired and the device. The device has a simple structure, is easy to operate, and is conducive to promotion. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structural layout of this utility model; In the diagram: 1-Left side pipe, 2-Left locking cap, 3-Left locking ring, 4-Left rear annular groove, 5-Left locking block, 6-Left internal thread of cylinder, 7-Left pusher body, 8-Left gasket, 9-Left sealing body, 10-Cylinder body, 11-Right sealing body, 12-Right gasket, 13-Right pusher body, 14-Right locking block, 15-Right rear annular groove, 16-Right locking ring, 17-Right locking cap, 18-Locking cap adjustment hole, 1 9-Left locking cap internal thread, 20-Left front conical body, 21-Left locking block rear external thread, 22-Locking block adjustment hole, 23-Left locking block front external thread, 24-Pipe limiting component, 24.1-Small limiting ring, 24.2-Large limiting ring, 25-Cylinder body right internal thread, 26-Right locking block front external thread, 27-Right locking block rear external thread, 28-Right front conical body, 29-Right locking cap internal thread, 30-Right side pipe. Detailed Implementation

[0015] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. Example 1

[0016] See Figure 1 A quick-connection device for pipes without on-site flame contact includes a cylindrical body 10, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting member 24 is circumferentially provided in the middle of the inner wall of the cylindrical body 10. The pipe limiting member 24 has a convex cross-section and includes a small limiting ring 24.1 located inside and a large limiting ring 24.2 located outside. The left-side pipe connection mechanism includes a left sealing body 9, a left gasket 8, a left pushing body 7, a left locking block 5, and a left locking ring 3 connected sequentially from front to back. The left locking cap 2 and the front end of the left pipe 1 abut against the left side of the small limit ring 24.1, and the front end of the left sealing body 9 abut against the left side of the large limit ring 24.2; the right pipe connection mechanism includes the right sealing body 11, the right gasket 12, the right push body 13, the right locking block 14, the right locking ring 16 and the right locking cap 17 connected in sequence from front to back, the front end of the right pipe 30 abuts against the right side of the small limit ring 24.1, and the front end of the right sealing body 11 abuts against the right side of the large limit ring 24.2. Example 2

[0017] See Figure 1A quick-connection device for pipes without on-site flame contact includes a cylindrical body 10, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting member 24 is circumferentially provided in the middle of the inner wall of the cylindrical body 10. The pipe limiting member 24 has a convex cross-section and includes a small limiting ring 24.1 located inside and a large limiting ring 24.2 located outside. The left-side pipe connection mechanism includes a left sealing body 9, a left gasket 8, a left pushing body 7, a left locking block 5, and a left locking ring 3 connected sequentially from front to back. The left locking cap 2 and the front end of the left pipe 1 abut against the left side of the small limit ring 24.1, and the front end of the left sealing body 9 abut against the left side of the large limit ring 24.2; the right pipe connection mechanism includes the right sealing body 11, the right gasket 12, the right push body 13, the right locking block 14, the right locking ring 16 and the right locking cap 17 connected in sequence from front to back, the front end of the right pipe 30 abuts against the right side of the small limit ring 24.1, and the front end of the right sealing body 11 abuts against the right side of the large limit ring 24.2.

[0018] Both the left sealing body 9 and the right sealing body 11 are graphite sealing bodies; both the left gasket 8 and the right gasket 12 are carbon steel gaskets. Graphite sealing materials have strong chemical stability and excellent high-temperature resistance and wear resistance, making them the preferred sealing material. Example 3

[0019] See Figure 1 A quick-connection device for pipes without on-site flame contact includes a cylindrical body 10, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting member 24 is circumferentially provided in the middle of the inner wall of the cylindrical body 10. The pipe limiting member 24 has a convex cross-section and includes a small limiting ring 24.1 located inside and a large limiting ring 24.2 located outside. The left-side pipe connection mechanism includes a left sealing body 9, a left gasket 8, a left pushing body 7, a left locking block 5, and a left locking ring 3 connected sequentially from front to back. The left locking cap 2 and the front end of the left pipe 1 abut against the left side of the small limit ring 24.1, and the front end of the left sealing body 9 abut against the left side of the large limit ring 24.2; the right pipe connection mechanism includes the right sealing body 11, the right gasket 12, the right push body 13, the right locking block 14, the right locking ring 16 and the right locking cap 17 connected in sequence from front to back, the front end of the right pipe 30 abuts against the right side of the small limit ring 24.1, and the front end of the right sealing body 11 abuts against the right side of the large limit ring 24.2.

[0020] Both the left sealing body 9 and the right sealing body 11 are graphite sealing bodies; both the left gasket 8 and the right gasket 12 are carbon steel gaskets. Graphite sealing materials have strong chemical stability and excellent high-temperature resistance and wear resistance, making them the preferred sealing material.

[0021] The left end of the cylinder 10 is provided with a left internal thread 6, and the right end of the cylinder 10 is provided with a right internal thread 25; the front end of the left locking block 5 is provided with a left locking block front external thread 23 that engages with the left internal thread 6, and the rear end of the left locking block 5 is provided with a left locking block rear external thread 21; the front end of the left locking cap 2 is provided with a left locking cap internal thread 19 that engages with the left locking block rear external thread 21; the front end of the right locking block 14 is provided with a right locking block front external thread 26 that engages with the right internal thread 25, and the rear end of the right locking block 14 is provided with a right locking block rear external thread 27; the front end of the right locking cap 17 is provided with a right locking cap internal thread 29 that engages with the right locking block rear external thread 27. Example 4

[0022] See Figure 1 A quick-connection device for pipes without on-site flame contact includes a cylindrical body 10, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting member 24 is circumferentially provided in the middle of the inner wall of the cylindrical body 10. The pipe limiting member 24 has a convex cross-section and includes a small limiting ring 24.1 located inside and a large limiting ring 24.2 located outside. The left-side pipe connection mechanism includes a left sealing body 9, a left gasket 8, a left pushing body 7, a left locking block 5, and a left locking ring 3 connected sequentially from front to back. The left locking cap 2 and the front end of the left pipe 1 abut against the left side of the small limit ring 24.1, and the front end of the left sealing body 9 abut against the left side of the large limit ring 24.2; the right pipe connection mechanism includes the right sealing body 11, the right gasket 12, the right push body 13, the right locking block 14, the right locking ring 16 and the right locking cap 17 connected in sequence from front to back, the front end of the right pipe 30 abuts against the right side of the small limit ring 24.1, and the front end of the right sealing body 11 abuts against the right side of the large limit ring 24.2.

[0023] Both the left sealing body 9 and the right sealing body 11 are graphite sealing bodies; both the left gasket 8 and the right gasket 12 are carbon steel gaskets. Graphite sealing materials have strong chemical stability and excellent high-temperature resistance and wear resistance, making them the preferred sealing material.

[0024] The left end of the cylinder 10 is provided with a left internal thread 6, and the right end of the cylinder 10 is provided with a right internal thread 25; the front end of the left locking block 5 is provided with a left locking block front external thread 23 that engages with the left internal thread 6, and the rear end of the left locking block 5 is provided with a left locking block rear external thread 21; the front end of the left locking cap 2 is provided with a left locking cap internal thread 19 that engages with the left locking block rear external thread 21; the front end of the right locking block 14 is provided with a right locking block front external thread 26 that engages with the right internal thread 25, and the rear end of the right locking block 14 is provided with a right locking block rear external thread 27; the front end of the right locking cap 17 is provided with a right locking cap internal thread 29 that engages with the right locking block rear external thread 27.

[0025] The left locking block 5 has a left rear annular groove 4 at its rear end, and the left locking ring 3 is open with a front end that can extend into the left rear annular groove 4. The right locking block 14 has a right rear annular groove 15 at its rear end, and the right locking ring 16 is open with a front end that can extend into the right rear annular groove 15. This design makes the engagement between the left locking block 5 and the left locking ring 3, and between the right locking block 14 and the right locking ring 16, more stable during the pushing process. Example 5

[0026] See Figure 1 A quick-connection device for pipes without on-site flame contact includes a cylindrical body 10, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting member 24 is circumferentially provided in the middle of the inner wall of the cylindrical body 10. The pipe limiting member 24 has a convex cross-section and includes a small limiting ring 24.1 located inside and a large limiting ring 24.2 located outside. The left-side pipe connection mechanism includes a left sealing body 9, a left gasket 8, a left pushing body 7, a left locking block 5, and a left locking ring 3 connected sequentially from front to back. The left locking cap 2 and the front end of the left pipe 1 abut against the left side of the small limit ring 24.1, and the front end of the left sealing body 9 abut against the left side of the large limit ring 24.2; the right pipe connection mechanism includes the right sealing body 11, the right gasket 12, the right push body 13, the right locking block 14, the right locking ring 16 and the right locking cap 17 connected in sequence from front to back, the front end of the right pipe 30 abuts against the right side of the small limit ring 24.1, and the front end of the right sealing body 11 abuts against the right side of the large limit ring 24.2.

[0027] Both the left sealing body 9 and the right sealing body 11 are graphite sealing bodies; both the left gasket 8 and the right gasket 12 are carbon steel gaskets. Graphite sealing materials have strong chemical stability and excellent high-temperature resistance and wear resistance, making them the preferred sealing material.

[0028] The left end of the cylinder 10 is provided with a left internal thread 6, and the right end of the cylinder 10 is provided with a right internal thread 25; the front end of the left locking block 5 is provided with a left locking block front external thread 23 that engages with the left internal thread 6, and the rear end of the left locking block 5 is provided with a left locking block rear external thread 21; the front end of the left locking cap 2 is provided with a left locking cap internal thread 19 that engages with the left locking block rear external thread 21; the front end of the right locking block 14 is provided with a right locking block front external thread 26 that engages with the right internal thread 25, and the rear end of the right locking block 14 is provided with a right locking block rear external thread 27; the front end of the right locking cap 17 is provided with a right locking cap internal thread 29 that engages with the right locking block rear external thread 27.

[0029] The left locking block 5 has a left rear annular groove 4 at its rear end, and the left locking ring 3 is open with a front end that can extend into the left rear annular groove 4. The right locking block 14 has a right rear annular groove 15 at its rear end, and the right locking ring 16 is open with a front end that can extend into the right rear annular groove 15. This design makes the engagement between the left locking block 5 and the left locking ring 3, and between the right locking block 14 and the right locking ring 16, more stable during the pushing process.

[0030] Both the left locking block 5 and the right locking block 14 are provided with locking block adjustment holes 22; both the left locking cap 2 and the right locking cap 17 are provided with locking cap adjustment holes 18. The locking block adjustment holes 22 and the locking cap adjustment holes 18 are designed to facilitate the use of tools to insert into the holes and rotate to adjust the tightness.

[0031] The basic working principle of this utility model is as follows: First, the ends of the left pipe 1 and the right pipe 30 at the connection point are neatly cut using a cold cutting method. The left sealing body 9 (graphite sealing body) is inserted into the cylinder 10, with its front end pressed against the left side of the large limit ring 24.2. The left gasket 8 and the left pusher 7 are then inserted in sequence. The left locking block 5 is rotated to initially engage with the left internal thread 6 of the cylinder. The left pipe 1 is then passed through the left locking cap 2 and the left locking ring 3, and then through the cavities of the left locking block 5, the left pusher 7, the left gasket 8, and the left sealing body 9 (graphite sealing body) before approaching the left side of the small limit ring 24.1, thus limiting the position of the left pipe 1. Insert the right sealing body 11 (graphite sealing body) into the cylinder 10 and place its front end against the right side of the large limit ring 24.2. Then, insert the right gasket 12 and the right pusher 13 in sequence. Rotate the right locking block 14 so that the right locking block 14 initially engages with the right internal thread 25 of the cylinder. Pass the right pipe 30 through the right locking cap 17 and the right locking ring 16, and then through the cavity of the right locking block 14, the right pusher 13, the right gasket 12 and the right sealing body 11 (graphite sealing body) in sequence, and approach the right side of the small limit ring 24.1 to limit the position of the right pipe 30. Continue rotating the left locking block 5 until it is fully engaged with the left internal thread 6 of the cylinder. The left pushing body 7 and the left gasket 8 further compress the left sealing body 9 (graphite sealing body) to achieve a full seal, and the left gasket 8 provides support. Continue rotating the right locking block 14 until it is fully engaged with the right internal thread 25 of the cylinder. The right pushing body 13 and the right gasket 12 further compress the right sealing body 11 (graphite sealing body) to achieve a full seal, and the right gasket 12 provides support. Rotate the left locking cap 2, and the internal thread 19 of the left locking cap engages with the external thread 21 of the left locking block. At the same time, push the left locking ring 3 to close its opening, locking the left pipe 1 and completing the sealing and fastening of the left pipe 1 with this device. Rotate the right locking cap 17, and the internal thread 29 of the right locking cap engages with the external thread 27 of the right locking block. At the same time, push the right locking ring 16 to close its opening, locking the right pipe 30 and completing the sealing and fastening of the right pipe 30 with this device.

Claims

1. A field joint for pipe connections without the use of a torch, characterized in that The device includes a cylindrical body, a left-side pipe connection mechanism, and a right-side pipe connection mechanism. A pipe limiting component is circumferentially located in the middle of the inner wall of the cylindrical body. The pipe limiting component has a convex cross-section and includes a small limiting ring located inside and a large limiting ring located outside. The left-side pipe connection mechanism includes a left sealing body, a left gasket, a left pushing body, a left locking block, a left locking ring, and a left locking cap connected sequentially. The front end of the left-side pipe abuts against the left side of the small limiting ring, and the front end of the left sealing body abuts against the left side of the large limiting ring. The right-side pipe connection mechanism includes a right sealing body, a right gasket, a right pushing body, a right locking block, a right locking ring, and a right locking cap connected sequentially. The front end of the right-side pipe abuts against the right side of the small limiting ring, and the front end of the right sealing body abuts against the right side of the large limiting ring.

2. The on-site non-flammable pipeline quick connection device according to claim 1, characterized in that, Both the left and right sealing bodies are graphite sealing bodies.

3. The on-site non-flammable pipeline quick connection device according to claim 1, characterized in that, Both the left and right gaskets are carbon steel gaskets.

4. The on-site non-flammable pipeline quick connection device according to claim 1, characterized in that, The left end of the cylinder is provided with a left internal thread, and the right end of the cylinder is provided with a right internal thread.

5. A quick-connect pipe connection device without on-site flame contact as described in claim 1, characterized in that, The front end of the left locking block is provided with a front external thread of the left locking block that engages with the left internal thread of the cylinder, and the rear end of the left locking block is provided with a rear external thread of the left locking block; the front end of the left locking cap is provided with an internal thread of the left locking cap that engages with the rear external thread of the left locking block.

6. The on-site non-flammable pipeline quick connection device according to claim 1, characterized in that, The left locking block has a left rear annular groove at its rear end, and the left locking ring is open and has a front end that can extend into the left rear annular groove.

7. The on-site non-flammable pipeline quick connection device according to claim 1, characterized in that, The front end of the right locking block is provided with a front external thread of the right locking block that engages with the right internal thread of the cylinder, and the rear end of the right locking block is provided with a rear external thread of the right locking block; the front end of the right locking cap is provided with an internal thread of the right locking cap that engages with the rear external thread of the right locking block.

8. A quick-connect pipe connection device without on-site flame contact according to claim 1, characterized in that, The rear end of the right locking block is provided with a right rear annular groove, and the right locking ring is open and the front end is a right front cone that can extend into the right rear annular groove.

9. A quick-connect pipe connection device without on-site flame contact according to claim 1, characterized in that, Both the left and right locking blocks are provided with locking block adjustment holes.

10. A quick-connect pipe connection device without on-site flame contact according to claim 1, characterized in that, Both the left and right locking caps are provided with locking cap adjustment holes.

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