A quick connecting clamp for oil production pipe

Abstract

The utility model discloses a kind of quick connection clamp of oil extraction pipe, belong to oil pipe connecting technical field, including first pipe body, the splicing shell of being sleeved in the outer wall of first pipe body, the splicing shell can slip along axial direction, and splicing shell end face is equipped with fixed first connecting surface, and the second pipe body of butt joint with first pipe body;The outer wall of second pipe body is equipped with positioning boss, and the butt joint surface of positioning boss and first pipe body is detachably equipped with compression sealing assembly;Splicing shell inner wall is equipped with main seal ring, and second pipe body is sealedly connected with main seal ring by second connecting surface;Locking clamp between splicing shell and second pipe body, for the quick locking of both;Splicing shell is equipped with rotatable adjusting mechanism in the end portion away from second pipe body, for driving splicing shell to move along axial direction to adjust the compression amount of main seal ring. The application is realized by the splicing shell of axial slippable, adjusting mechanism, compression sealing assembly and sealing state indicating mark, and the adjustment and visual of sealing compression amount.

Description

Technical Field

[0001] This utility model belongs to the field of oil pipe connection technology, specifically relating to a quick-connect clamp for oil production pipes. Background Technology

[0002] At oilfield sites, pipeline connections need to meet requirements for pressure resistance, temperature resistance, and rapid assembly / disassembly. Publication patent CN215173111U discloses a quick-connect fitting for automotive oil lines, achieving rapid connection through a spliced ​​outer shell, elastic sealing ring, locking block, and insertion rod. However, this structure has the following shortcomings: 1. The spliced ​​outer shell is fixed, and the sealing ring cannot compensate for the compression after aging, resulting in sealing failure; 2. The sealing status indication function requires disassembly for inspection, resulting in low maintenance efficiency; 3. Relying solely on the elasticity of the sealing ring, it will experience significant permanent deformation due to compression after long-term use, leading to a high risk of leakage.

[0003] Therefore, there is an urgent need for an oil production pipe connection solution that can adjust the sealing pressure, visually display the sealing status, and is easy to install and disassemble. Summary of the Invention

[0004] To address the aforementioned problems, this utility model discloses a quick-connect clamp for oil production pipes. It has a simple structure and achieves real-time adjustment and visual monitoring of the sealing compression through an axially sliding splicing shell, adjustment mechanism, compression sealing assembly, and sealing status indicator. This solves the problems of unadjustable sealing failure and difficult maintenance in existing technologies.

[0005] To achieve the above objectives, the specific technical solution of this application is as follows: A quick-connect clamp for oil production tubing includes a first tubing body, a splicing outer shell fitted onto the outer wall of the first tubing body, the splicing outer shell being axially slidable, and a fixed first connecting surface on the end face of the splicing outer shell, and a second tubing body that abuts against the first tubing body; a positioning boss on the outer wall of the second tubing body, the mating surface of the positioning boss and the first tubing body being detachably provided with a compression sealing assembly; a main sealing ring on the inner wall of the splicing outer shell, the second tubing body and the main sealing ring being sealed together through a second connecting surface; a locking clamp between the splicing outer shell and the second tubing body for quickly locking the two together; and a rotatable adjustment mechanism at the end of the splicing outer shell away from the second tubing body for driving the splicing outer shell to move axially to adjust the compression of the main sealing ring.

[0006] Based on the above technical features, preferably, the adjustment mechanism includes a threaded sleeve and an adjusting nut, the threaded sleeve is fixed to the outer wall of the first tube, and the adjusting nut is rotatably connected to the spliced ​​outer shell and threadedly engaged with the threaded sleeve.

[0007] Based on the above technical features, preferably, the main sealing ring has a double-layer structure, including an inner fluororubber sealing ring and an outer metal reinforcing ring.

[0008] Based on the above technical features, preferably, the compression sealing assembly includes an elastic pressure ring and a rubber sealing ring, wherein the elastic pressure ring is a wave spring structure that can provide continuous compression force in the axial direction.

[0009] Based on the above technical features, preferably, the locking clamp is a quick-release structure, including two semi-circular retaining rings and a quick-lock buckle. The quick-lock buckle engages with the splicing shell, and the inner side of the retaining ring is provided with a limiting groove that cooperates with the splicing shell and the positioning boss.

[0010] Based on the above technical features, preferably, the outer wall of the first tube is provided with a color strip indicator mark for indicating the sealing status, which is used to show the degree of compression of the compression sealing component.

[0011] Compared with the prior art, the beneficial effects of this application are as follows: This application allows the splicing shell to be moved axially by rotating the adjusting nut, thereby adjusting the compression of the sealing component in real time. It can compensate for the decline in sealing performance caused by aging of the sealing ring, temperature changes, or pressure fluctuations without disassembling the clamps or interrupting pipeline operation. Compared with the traditional fixed structure, it significantly extends the sealing life and system operation cycle, and reduces the frequency of downtime maintenance and labor costs. By pressing the sealing assembly and the first connecting surface together, the main sealing ring and the second connecting surface achieve double redundant sealing protection. When the adjusting nut presses the sealing assembly to the left, the main sealing surface is also compressed by the second connecting surface, further improving the sealing performance. Colored indicator marks are set on the outer wall of the first tube, and the end of the spliced ​​shell is used as a pointer. The degree of sealing compression is displayed intuitively by relative displacement. The inspection personnel do not need to disassemble the connecting parts. They can judge whether the seal has failed or needs adjustment simply by observing the position of the shell, which greatly improves the efficiency and safety of the inspection. It is especially suitable for field or high-altitude work environments where disassembly and assembly are inconvenient. The compression sealing assembly adopts a combination structure of wave spring elastic pressure ring and rubber sealing ring. The wave spring provides continuous axial elastic force throughout the entire life cycle, which can dynamically offset the sealing insufficiency caused by permanent deformation and stress relaxation of the rubber sealing ring or main sealing ring, effectively preventing early leakage and sudden sealing failure. The main sealing ring adopts a double-layer composite structure of inner fluororubber and outer metal reinforcing ring, which takes into account corrosion resistance, high temperature resistance and extrusion resistance. The fluororubber layer is suitable for corrosive media such as oil and sulfur-containing liquids, while the metal ring enhances the structural stability of the sealing ring under high pressure, effectively preventing the sealing ring from being extruded or crushed. It is suitable for harsh working conditions such as high pressure, high temperature and fluids containing impurities. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a quick-connect clamp for oil production pipe according to this utility model; Figure 2 This is a partial structural diagram of the present invention; Figure 3 This is a schematic diagram of part A of the present invention; List of identifiers in attached diagrams: 1. First tube body; 2. Spliced ​​outer shell; 3. Main sealing ring; 4. Second tube body; 41. Positioning boss; 5. Pressing sealing assembly; 51. Elastic pressure ring; 52. Rubber sealing ring; 6. Locking clamp; 61. Snap ring; 62. Quick lock; 7. Adjusting mechanism; 71. Threaded sleeve; 72. Adjusting nut; 8. Colored indicator mark; 9. First connecting surface; 10. Second connecting surface. Detailed Implementation

[0013] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0014] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] like Figure 1 As shown, a quick-connect clamp for oil production tubing includes a first pipe body 1 and a splicing shell 2 fitted onto the outer wall of the first pipe body 1. The end face of the splicing shell is provided with a fixed first connecting surface 9. The splicing shell 2 can slide along the axial direction. Preferably, the splicing shell 2 and the first pipe body 1 are provided with a corresponding sliding groove structure, and the splicing shell 2 can slide away from the interface end along the sliding groove mechanism.

[0016] A second tube 4 is connected to the first tube 1; the outer wall of the second tube 4 is provided with a positioning boss 41, and the mating surface of the positioning boss 4 and the first tube 1 is detachably provided with a pressing and sealing assembly 5, which is sealed to the first connecting surface; the inner wall of the spliced ​​outer shell 2 is provided with a main sealing ring 3, and the second tube 4 and the main sealing ring 3 are sealed to each other through the second connecting surface.

[0017] The locking clamp 6 between the splicing shell 2 and the second tube 4 is used to quickly lock the two together; the splicing shell 2 is provided with a rotatable adjustment mechanism 7 at the end away from the second tube 4, which is used to drive the splicing shell 2 to move axially to adjust the compression of the main sealing ring 3.

[0018] The adjustment mechanism 7 includes a threaded sleeve 71 and an adjusting nut 72. The threaded sleeve 71 is fixed to the outer wall of the first tube 1, and the adjusting nut 72 is rotatably connected to the spliced ​​outer shell 2 and threadedly engaged with the threaded sleeve 71.

[0019] The main sealing ring 3 has a double-layer structure, including an inner fluororubber sealing ring and an outer metal reinforcing ring.

[0020] The compression sealing assembly 5 includes an elastic pressure ring 51 and an adjustable pressure cap 52. The elastic pressure ring 51 is a wave spring structure that can provide continuous compression force in the axial direction.

[0021] The locking clamp 6 is a quick-release structure, including two semi-circular retaining rings 61 and a quick-locking buckle 62. The quick-locking buckle 62 engages with the splicing shell 2. The inner side of the retaining rings 61 is provided with a limiting groove that cooperates with the splicing shell 2 and the positioning boss 41. Figure 3 As shown, the quick-locking buckle 62 is a locking structure formed by a cam locking pin structure. It is equipped with a button for quick contact and locking to complete disassembly. Alternatively, an eccentric rod locking structure can be used.

[0022] The outer wall of the first tube body 1 is provided with a sealing status indicator mark 11 to display the degree of compression of the compression sealing assembly 5. Preferably, three color bands are machined along the axial direction on the outer wall of the first tube body 1: green zone (preferred), yellow zone (warning), and red zone (failure). The end face of the spliced ​​outer shell 2 serves as an indicator arrow. During installation, it is adjusted to the green zone; during operation, the outer shell retracts to the left as the sealing ring ages, and the change in the color band area can intuitively reflect the sealing life, realizing inspection without disassembly.

[0023] In summary, this application has a simple structure and achieves real-time adjustment and visual monitoring of the sealing compression through an axially sliding splicing shell, adjustment mechanism, compression sealing assembly and sealing status indicator, thus solving the problems of unadjustable sealing failure and difficult maintenance in the prior art.

[0024] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A quick-connect clamp for oil production tubing, characterized in that: The system includes a first tube (1), a splicing shell (2) fitted on the outer wall of the first tube (1), the splicing shell (2) being slidable along the axial direction, a fixed first connecting surface (9) on the end face of the splicing shell, and a second tube (4) that is connected to the first tube (1); the outer wall of the second tube (4) is provided with a positioning boss (41), and the mating surface of the positioning boss (41) and the first tube (1) is detachably provided with a compression sealing assembly (5); the inner wall of the splicing shell (2) is provided with a main sealing ring (3), and the second tube (4) and the main sealing ring (3) are sealed together through a second connecting surface (10); a locking clamp (6) between the splicing shell (2) and the second tube (4) is used to quickly lock the two together; the splicing shell (2) is provided with a rotatable adjustment mechanism (7) at the end away from the second tube (4), which is used to drive the splicing shell (2) to move along the axial direction to adjust the compression of the main sealing ring (3).

2. The quick-connect clamp for oil production tubing according to claim 1, characterized in that: The adjustment mechanism (7) includes a threaded sleeve (71) and an adjusting nut (72). The threaded sleeve (71) is fixed to the outer wall of the first tube (1), and the adjusting nut (72) is rotatably connected to the spliced ​​outer shell (2) and threadedly engaged with the threaded sleeve (71).

3. The quick-connect clamp for oil production tubing according to claim 1, characterized in that: The main sealing ring (3) has a double-layer structure, including an inner fluororubber sealing ring and an outer metal reinforcing ring.

4. The quick-connect clamp for oil production tubing according to claim 1, characterized in that: The compression sealing assembly (5) includes an elastic pressure ring (51) and a rubber sealing ring (52). The elastic pressure ring (51) is a wave spring structure that can provide continuous compression force in the axial direction.

5. The quick-connect clamp for oil production tubing according to claim 1, characterized in that: The locking clamp (6) is a quick-release structure, including two semi-circular retaining rings (61) and a quick lock (62). The quick lock (62) engages with the splicing shell (2). The inner side of the retaining ring (61) is provided with a limiting groove that cooperates with the splicing shell (2) and the positioning boss (41).

6. The quick-connect clamp for oil production tubing according to claim 1, characterized in that: The outer wall of the first tube (1) is provided with a color strip indicator (8) to indicate the sealing status, which is used to show the degree of compression of the compression sealing assembly (5).

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