A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure

Abstract

This invention discloses a streamlined flexible connection structure for a high-pressure, high-flow-rate, large-diameter fracturing hose, relating to the field of flexible connection technology for fracturing hoses. It includes a first fixing ring, with an outer shell fixedly connected to one side of the first fixing ring and an outer hose fixedly connected to the other side. A second fixing ring is located at one end of the outer hose, and a first fracturing tube is located on one side of the second fixing ring. Multiple first fixing bolts are located on the outer wall of the second fixing ring, and a second fracturing tube is located at one end of the outer shell. This streamlined flexible connection structure for a high-pressure, high-flow-rate, large-diameter fracturing hose allows for rapid adjustment of the fracturing fluid delivery direction by tightening one end of the steel cable, thereby bending the inner and outer hoses at the location of the steel cable inwards. Multiple adjusting and flexible mechanisms work together to change the bending direction of the outer hose, achieving the desired fracturing fluid delivery direction.

Description

Technical Field

[0001] This invention relates to the field of flexible connection technology for fracturing hoses, and more particularly to a streamlined flexible connection structure for high-pressure, high-flow-rate, large-diameter fracturing hoses. Background Technology

[0002] Large-diameter fracturing hose technology plays a vital role in oil and gas extraction, especially in hydraulic fracturing operations. With the increasing demand for oil and gas resource development, advancements in fracturing technology have promoted the research and application of large-diameter hoses. These hoses can withstand high pressure and high flow rates of fracturing fluid, ensuring the safety and effectiveness of fracturing operations. Fracturing fluid is typically composed of water, sand, and chemical additives, and its properties include high viscosity, good fluidity, and chemical stability. These characteristics help improve the conductivity of rock fractures, thereby enhancing resource extraction efficiency.

[0003] Although large-diameter fracturing hoses have significant advantages in efficiently transporting fracturing fluid, there are some operational shortcomings in practical applications. Generally, when it is necessary to change the direction of fracturing fluid transport by the fracturing hose, the connection mechanism must be disassembled. This process is complex, time-consuming, and labor-intensive, usually requiring multiple workers to work together, which increases the complexity of the operation and safety hazards. Frequent disassembly and reconnection may cause hose wear, thereby affecting its service life and transmission efficiency. In addition, the possibility of liquid leakage during disassembly further reduces work efficiency and cannot meet actual needs. Summary of the Invention

[0004] This invention discloses a streamlined flexible connection structure for high-pressure, high-flow-rate, large-diameter fracturing hoses. The aim is to solve the problem that, under normal circumstances, when the direction of fracturing fluid transmission through the fracturing hose needs to be changed, the connection mechanism must be disassembled. This process is complex, time-consuming, and labor-intensive, typically requiring multiple workers to collaborate, increasing operational complexity and safety hazards. Frequent disassembly and reconnection can lead to hose wear, affecting its service life and transmission efficiency. Furthermore, potential liquid leakage during disassembly further reduces work efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A streamlined flexible connection structure for a high-pressure, high-flow-rate, large-diameter fracturing hose includes a first fixing ring, a shell fixedly connected to one side of the first fixing ring, an outer hose fixedly connected to the other side of the first fixing ring, a second fixing ring at one end of the outer hose, a first fracturing tube at one side of the second fixing ring, a plurality of first fixing bolts on the outer wall of the second fixing ring, a second fracturing tube at one end of the shell, and a base at the bottom of the first fixing ring.

[0007] One end of the outer shell and the second fixing ring is respectively equipped with a tensioning structure. The tensioning structure is used to seal the edges of the outer shell and the second fixing ring by using the pressure at the connection between the outer shell and the second fixing ring and the tensioning structure, so as to prevent the leakage of liquid from the first fixing ring, the outer hose, the second fixing ring, the first fracturing tube, the second fracturing tube and the inside of the outer shell.

[0008] The outer hose is equipped with a flexible mechanism, and the flexible mechanism is equipped with an inner hose. The flexible mechanism is used to change the bending direction of the outer hose and cooperates with the tensioning structure to change the flow direction of the fracturing fluid.

[0009] The outer surface of the housing is equipped with multiple adjustment mechanisms, which work together with the flexible mechanism to ensure the stability of the flexible mechanism;

[0010] The tensioning structure is equipped with a sealing mechanism inside, which works in conjunction with the tensioning structure to seal the edges of the first fracturing tube and the second fracturing tube respectively.

[0011] The tensioning structure includes a mounting ring fixedly connected to one end of the outer shell and the second fixing ring. Multiple mounting blocks are fixedly connected to the inner surface of the mounting ring. The multiple mounting blocks are arranged in a circular sequence on the inner surface of the mounting ring. A base plate is fixedly connected to one side of each mounting block. Multiple pressing plates are provided on the outer surface of the mounting ring. Multiple second fixing bolts are provided at the connection between the pressing plates and the mounting ring. A wedge block is provided between the pressing plate and the base plate. An upper clamping plate and a lower clamping plate are rotatably connected to one side of each wedge block.

[0012] One end of the second fracturing tube is located between the upper clamping plate and the lower clamping plate. The pressing plate and the bottom plate are respectively provided with a first groove and a second groove on one end edge. An inner sealing ring is provided inside the first groove, and an outer sealing ring is provided on the inner wall of the second groove. Multiple fixing teeth are provided at the bottom of the pressing plate and the top of the bottom plate near the wedge block. Multiple safety teeth are provided on the lower surface of the upper clamping plate and the upper surface of the lower clamping plate. Multiple wedge teeth are provided on the upper surface and the lower surface of the wedge block.

[0013] In a preferred embodiment, the flexible mechanism includes multiple steel cables inserted into the other side of the first fixing ring, multiple first fixing rods and second fixing rods fixedly connected at the connection between the first fixing ring and the outer flexible tube, and multiple support rings slidably connected from one end of the steel cables to the other end.

[0014] Tension springs are respectively installed between the support rings and are sleeved on the steel cable. Multiple support rings are located between the first fixed ring and the second fixed ring. The outer edges of the support rings are respectively fixedly connected to an outer metal frame, and the inner edges of the support rings are respectively fixedly connected to an inner metal frame.

[0015] In a preferred embodiment, the adjustment mechanism includes a plurality of fixed blocks fixedly connected to the outer wall of the housing. The surface of each fixed block is provided with a mounting shell. An adjustment gear is rotatably connected inside the mounting shell. A handle is fixedly connected to the upper surface of the adjustment gear. An adjustment block is rotatably connected inside the mounting shell near the adjustment gear.

[0016] A fixed frame is fixedly connected inside the mounting housing near the adjusting block. A rotating seat is rotatably connected inside the fixed frame. A rotating plate is rotatably connected to one end of the rotating seat. A compression spring is provided between the rotating plate and the rotating seat. An adjusting rod is fixedly connected to the other end of the rotating seat. An adjusting rack is slidably connected inside the mounting housing on the other side of the adjusting gear.

[0017] One end of the adjusting rack is fixedly connected to a sliding cylinder, the sliding cylinder is fixedly connected to one end of the steel cable, one end of the sliding cylinder is slidably connected to an mounting cylinder, and one end of the mounting cylinder is fitted with a buffer spring.

[0018] When the adjustment gear needs to be reversed, rotating the adjustment rod causes the rotating seat to rotate 180 degrees, which in turn causes the adjustment block to rotate 180 degrees, reversing the position of the adjustment block. At this time, the adjustment gear squeezes the adjustment block and the rotating plate, thereby squeezing the compression spring and causing the adjustment gear to reverse. When the rotation direction of the adjustment gear needs to be adjusted again, the adjustment rod is rotated again, which achieves the effect of flexibly adjusting the loosening and tightening of the steel cable.

[0019] In a preferred embodiment, the sealing mechanism includes a sealing rack fixedly connected to the other side of the wedge block, an intermediate gear and an incomplete gear being rotatably connected inside the mounting block, the sealing rack meshing with the intermediate gear, the intermediate gear meshing with the incomplete gear, and a sealing plate fixedly connected to one side of the incomplete gear.

[0020] The lower surface of the sealing plate is streamlined, and the upper surface of the sealing plate is in close contact with the lower surface of the base plate. A sealing sleeve is provided on the lower surface of the sealing plate, which serves to seal the connection between the sealing plate and the mounting block.

[0021] As can be seen from the above, the streamlined flexible connection structure of the high-pressure, high-flow-rate, large-diameter fracturing hose provided by the present invention has the following technical effects:

[0022] 1. By turning the handle, the adjusting gear is rotated, which in turn drives the adjusting rack and sliding cylinder to pull one of the steel cables, tightening one end of the steel cable. Multiple support rings compress multiple tension springs on the steel cable, thereby causing the inner and outer hoses at the location of the steel cable to bend inward. The direction of fracturing fluid delivery is determined by the cooperation of multiple adjusting and flexible mechanisms, which change the bending direction of the outer hose, thus achieving the effect of quickly adjusting the direction of fracturing fluid delivery.

[0023] 2. After the steel cable is stretched, it is tightened by adjusting the rotation of the gear and the sliding of the rack. During the rotation of the gear, the gear moves the adjusting block, which rotates and compresses the spring. After the steel cable is tightened to the predetermined position, the handle is released, and the gear reverses under the pull of the steel cable and the rack. Due to the design of the adjusting block and the rotating plate, the rotating plate is always in contact with the adjusting block. When the gear reverses, the adjusting block will lock the gear, preventing it from reversing and fixing the position of the steel cable and the gear, thus stabilizing the bending direction of the outer hose.

[0024] 3. Due to the pressure inside the fracturing fluid, the outer hose, the first fracturing tube, and the second fracturing tube are squeezed, causing the first and second fracturing tubes to be subjected to an outward force. This force pulls the first and second fracturing tubes outward, thereby pulling the wedge block to slide outward. The wedge block is wedge-shaped, and the further outward the wedge block slides, the greater the resistance. This causes the upper and lower clamping plates to rotate relative to each other and clamp the edges of the first and second fracturing tubes, making the upper and lower clamping plates tightly connected to the first and second fracturing tubes respectively. The design of the wedge teeth and the fixed teeth ensures that the wedge block can only slide outward and cannot slide inward, achieving the effect of using the fracturing fluid pressure to tightly connect the pipelines.

[0025] 4. During the sliding process of the wedge block, the sealing plate is rotated outward, causing the upper surface of the sealing plate to press against the lower surface of the base plate, eliminating the gap between the sealing plate and the base plate. At the same time, the sealing sleeve is opened outward, increasing its diameter and pressing tightly against the lower surface of the sealing plate. As the fracturing fluid flows through the sealing sleeve, the streamlined shape of the sealing plate better guides the flow of the fracturing fluid, effectively sealing and guiding the fracturing fluid at the connection between the sealing plate and the mounting block. Attached Figure Description

[0026] Figure 1 This is an isometric structural diagram of a streamlined flexible connection structure for a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0027] Figure 2 This is a bottom view schematic diagram of the streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0028] Figure 3This is a schematic cross-sectional view of the streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0029] Figure 4 This is a partial cross-sectional schematic diagram of the streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0030] Figure 5 This is a schematic diagram of the streamlined flexible connection structure and adjusting gear structure of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0031] Figure 6 This is a schematic diagram of the streamlined flexible connection structure of the sliding cylinder for a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0032] Figure 7 This is a schematic diagram of the streamlined flexible connection structure adjustment block of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0033] Figure 8 This is a schematic diagram of the streamlined flexible connection structure mounting block for a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0034] Figure 9 This is a schematic diagram of the streamlined flexible connection structure sealing plate of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0035] Figure 10 This is a schematic diagram of the streamlined flexible connection structure and inner sealing ring structure of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0036] Figure 11 This is a schematic diagram of the streamlined flexible connection structure wedge block structure of a high-pressure, high-flow-rate, large-diameter fracturing hose proposed in this invention.

[0037] In the diagram: 1. First fixing ring; 2. Outer hose; 3. Second fixing ring; 4. First fracturing tube; 5. First fixing bolt; 6. Handle; 7. Mounting shell; 8. Pressing plate; 9. Second fracturing tube; 10. Outer shell; 11. Base; 12. Fixing block; 13. Inner hose; 14. Mounting ring; 15. Second fixing bolt; 16. Sealing sleeve; 17. Sliding cylinder; 18. Steel cable; 19. Support ring; 20. Inner metal frame; 21. Outer metal frame; 22. Tension spring; 23. First fixing rod; 24. Second fixing rod 25. Mounting cylinder; 26. Buffer spring; 27. Adjusting rod; 28. Adjusting gear; 29. ​​Adjusting rack; 30. Compression spring; 31. Rotating seat; 32. Fixing frame; 33. Rotating plate; 34. Adjusting block; 35. Mounting block; 36. Intermediate gear; 37. Sealing rack; 38. Wedge block; 39. Upper clamping plate; 40. Base plate; 41. Lower clamping plate; 42. Sealing plate; 43. Incomplete gear; 44. Wedge tooth; 45. Fixing tooth; 46. Safety tooth; 47. Inner sealing ring; 48. Outer sealing ring. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] The streamlined flexible connection structure of the high-pressure, high-flow-rate, large-diameter fracturing hose disclosed in this invention is mainly used in general situations where it is necessary to change the direction of fracturing fluid transmission through the fracturing hose. This process is complex, time-consuming, and labor-intensive, usually requiring multiple workers to work together, which increases the complexity of the operation and safety hazards. Frequent disassembly and reconnection may cause hose wear, thereby affecting its service life and transmission efficiency. In addition, the possibility of liquid leakage during disassembly further reduces work efficiency.

[0040] Reference Figure 1 — Figure 11 A streamlined flexible connection structure for a high-pressure, high-flow-rate, large-diameter fracturing hose includes a first fixing ring 1, a shell 10 fixedly connected to one side of the first fixing ring 1, an outer hose 2 fixedly connected to the other side of the first fixing ring 1, a second fixing ring 3 provided at one end of the outer hose 2, a first fracturing tube 4 provided on one side of the second fixing ring 3, a plurality of first fixing bolts 5 provided on the outer wall of the second fixing ring 3, a second fracturing tube 9 provided at one end of the shell 10, and a base 11 provided at the bottom of the first fixing ring 1;

[0041] Tensioning structures are respectively installed at one end of the outer shell 10 and the second fixing ring 3. The tensioning structures are used to seal the edges of the outer shell 10 and the second fixing ring 3 with the pressure at the connection between the outer shell 10 and the second fixing ring 3 and the tensioning structure, so as to prevent the leakage of liquid from the first fixing ring 1, the outer hose 2, the second fixing ring 3, the first fracturing tube 4, the second fracturing tube 9 and the inside of the outer shell 10.

[0042] The outer hose 2 has a flexible mechanism installed inside, and the inner hose 13 is installed inside the flexible mechanism. The flexible mechanism is used to change the bending direction of the outer hose 2, and at the same time cooperates with the tensioning structure, so that the outer hose 2 can be used to change the flow direction of fracturing fluid.

[0043] Multiple adjustment mechanisms are installed on the outer surface of the outer casing 10. The adjustment mechanisms work together with the flexible mechanism to ensure the stability of the flexible mechanism.

[0044] The tensioning structure is equipped with a sealing mechanism inside. The sealing mechanism works with the tensioning structure to seal the edges of the tensioning structure with the first fracturing tube 4 and the second fracturing tube 9, respectively.

[0045] The tensioning structure includes a mounting ring 14 fixedly connected to one end of the outer shell 10 and the second fixing ring 3. Multiple mounting blocks 35 are fixedly connected to the inner surface of the mounting ring 14. The multiple mounting blocks 35 are arranged in a circular sequence on the inner surface of the mounting ring 14. A base plate 40 is fixedly connected to one side of the mounting block 35. Multiple pressing plates 8 are provided on the outer surface of the mounting ring 14. Multiple second fixing bolts 15 are provided at the connection between the pressing plate 8 and the mounting ring 14. A wedge block 38 is provided between the pressing plate 8 and the base plate 40. An upper clamping plate 39 and a lower clamping plate 41 are rotatably connected to one side of the wedge block 38.

[0046] One end of the second fracturing tube 9 is located between the upper clamping plate 39 and the lower clamping plate 41. The first groove and the second groove are respectively provided on the edge of one end of the pressing plate 8 and the bottom plate 40. An inner sealing ring 47 is provided inside the first groove, and an outer sealing ring 48 is provided on the inner wall of the second groove. Multiple fixing teeth 45 are respectively provided at the bottom of the pressing plate 8 and the top of the bottom plate 40 near the wedge block 38. Multiple safety teeth 46 are respectively provided on the lower surface of the upper clamping plate 39 and the upper surface of the lower clamping plate 41. Multiple wedge teeth 44 are respectively provided on the upper surface and the lower surface of the wedge block 38.

[0047] In this embodiment, the fracturing fluid needs to be transported using a first fracturing pipe 4 and a second fracturing pipe 9. The fracturing fluid enters the inner hose 13 through the first fracturing pipe 4 and then enters the interior of the second fracturing pipe 9 through the inner hose 13.

[0048] As the fracturing fluid has the characteristics of high pressure and high flow rate, at the connection between the second fracturing tube 9 and the first fracturing tube 4 and the outer hose 2, the rapid flow of the fracturing fluid impacts the inner walls of the outer hose 2, the first fracturing tube 4 and the second fracturing tube 9. The pressure inside the fracturing fluid squeezes the outer hose 2, the first fracturing tube 4 and the second fracturing tube 9, causing the first fracturing tube 4 and the second fracturing tube 9 to be subjected to an outward force. This force pulls the first fracturing tube 4 and the second fracturing tube 9 outward, thereby pulling the wedge block 38 to slide outward.

[0049] Furthermore, the wedge block 38 is wedge-shaped, and the resistance increases as the wedge block 38 slides outward, thereby causing the upper clamping plate 39 and the lower clamping plate 41 to rotate relative to each other and clamp the edges of the first fracturing pipe 4 and the second fracturing pipe 9. This ensures that the upper clamping plate 39 and the lower clamping plate 41 are tightly connected to the first fracturing pipe 4 and the second fracturing pipe 9, respectively. The design of the wedge teeth 44 and the fixed teeth 45 ensures that the wedge block 38 can only slide outward and not inward, thus achieving the effect of using the fracturing fluid pressure to tightly connect the pipelines.

[0050] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the flexible mechanism includes a plurality of steel cables 18 inserted into the other side of the first fixing ring 1, a plurality of first fixing rods 23 and second fixing rods 24 fixedly connected to the connection between the first fixing ring 1 and the outer hose 2, and a plurality of support rings 19 slidably connected from one end of the steel cables 18 to the other end.

[0051] Tension springs 22 are respectively provided between the support rings 19. The tension springs 22 are sleeved on the steel cable 18. Multiple support rings 19 are located between the first fixed ring 1 and the second fixed ring 3. The outer metal frame 21 is fixedly connected to the outer edge of the support ring 19, and the inner metal frame 20 is fixedly connected to the inner edge of the support ring 19.

[0052] In this embodiment, when it is necessary to change the delivery direction of the fracturing fluid, the adjustment gear 28 is rotated by turning the handle 6, which in turn drives the adjustment rack 29 and the sliding cylinder 17 to pull one of the steel cables 18, so that one end of the steel cable 18 is tightened. Multiple support rings 19 are used to squeeze multiple tension springs 22 on the steel cable 18, thereby causing the inner hose 13 and the outer hose 2 at the location of the steel cable 18 to bend inward.

[0053] Furthermore, while multiple support rings 19 compress the tension spring 22, they simultaneously compress the inner metal frame 20 and the outer metal frame 21. The inner metal frame 20 and the outer metal frame 21 deform under compression. The inner metal frame 20 supports the inner hose 13. Since the fracturing fluid is corrosive, the inner hose 13 seals the internal fracturing fluid. The outer metal frame 21 supports the outer hose 2, which isolates the external environment. This changes the bending direction of the outer hose 2. By using multiple adjustment mechanisms and flexible mechanisms in coordination, the bending direction of the outer hose 2 can be changed, achieving the effect of quickly adjusting the fracturing fluid delivery direction.

[0054] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 In a preferred embodiment, the adjustment mechanism includes a plurality of fixing blocks 12 fixedly connected to the outer wall of the housing 10. The surface of the fixing block 12 is provided with a mounting shell 7. An adjustment gear 28 is rotatably connected inside the mounting shell 7. A handle 6 is fixedly connected to the upper surface of the adjustment gear 28. An adjustment block 34 is rotatably connected inside the mounting shell 7 near the adjustment gear 28.

[0055] Inside the mounting housing 7, near the adjusting block 34, a fixed frame 32 is fixedly connected. Inside the fixed frame 32, a rotating seat 31 is rotatably connected. One end of the rotating seat 31 is rotatably connected to a rotating plate 33. A compression spring 30 is provided between the rotating plate 33 and the rotating seat 31. The other end of the rotating seat 31 is fixedly connected to an adjusting rod 27. Inside the mounting housing 7, on the other side of the adjusting gear 28, an adjusting rack 29 is slidably connected.

[0056] One end of the adjusting rack 29 is fixedly connected to a sliding cylinder 17, which is fixedly connected to one end of the steel cable 18. One end of the sliding cylinder 17 is slidably connected to an mounting cylinder 25, and one end of the mounting cylinder 25 is fitted with a buffer spring 26.

[0057] In this embodiment, after the steel cable 18 is stretched, the steel cable 18 is tightened by the rotation of the adjusting gear 28 and the sliding of the adjusting rack 29. During the rotation of the adjusting gear 28, the adjusting gear 28 moves the adjusting block 34, and the adjusting block 34 rotates to compress the spring 30. After the steel cable 18 is tightened to the predetermined position, the handle 6 is released, and the adjusting gear 28 reverses under the pull of the steel cable 18 and the adjusting rack 29.

[0058] Furthermore, due to the design of the adjusting block 34 and the rotating plate 33, the rotating plate 33 is always in contact with the adjusting block 34. When the adjusting gear 28 reverses, the adjusting block 34 will lock the adjusting gear 28, preventing the adjusting gear 28 from reversing, thus fixing the position of the steel cable 18 and the adjusting gear 28, and achieving the effect of stabilizing the bending direction of the outer hose 2.

[0059] In this embodiment, when it is necessary to reverse the adjusting gear 28, rotating the adjusting rod 27 drives the rotating seat 31 to rotate 180 degrees, thereby driving the adjusting block 34 to rotate 180 degrees, causing the position of the adjusting block 34 to reverse. At this time, the adjusting gear 28 squeezes the adjusting block 34 and the rotating plate 33, thereby squeezing the compression spring 30, and the adjusting gear 28 reverses. When it is necessary to adjust the rotation direction of the adjusting gear 28 again, the adjusting rod 27 is rotated again, which achieves the effect of flexibly adjusting the loosening and tightening of the steel cable 18.

[0060] Reference Figure 4 , Figure 9 , Figure 10 and Figure 11 In a preferred embodiment, the sealing mechanism includes a sealing rack 37 fixedly connected to the other side of the wedge block 38. An intermediate gear 36 and an incomplete gear 43 are rotatably connected inside the mounting block 35. The sealing rack 37 meshes with the intermediate gear 36, the intermediate gear 36 meshes with the incomplete gear 43, and a sealing plate 42 is fixedly connected to one side of the incomplete gear 43.

[0061] The lower surface of the sealing plate 42 is streamlined, and the upper surface of the sealing plate 42 is in close contact with the lower surface of the base plate 40. A sealing sleeve 16 is provided on the lower surface of the sealing plate 42, which serves to seal the connection between the sealing plate 42 and the mounting block 35.

[0062] In this embodiment, during the sliding of the wedge block 38, the wedge block 38 drives the sealing rack 37 to slide, and the sealing rack 37 drives the intermediate gear 36 and the incomplete gear 43 to rotate, thereby driving the sealing plate 42 to rotate outward, so that the upper surface of the sealing plate 42 presses against the lower surface of the base plate 40, eliminating the gap between the sealing plate 42 and the base plate 40. At the same time, it drives the sealing sleeve 16 to open outward, the diameter of the sealing sleeve 16 increases, and the sealing sleeve 16 is tightly attached to the lower surface of the sealing plate 42. When the fracturing fluid flows through the sealing sleeve 16, the streamlined shape of the sealing plate 42 better guides the flow of fracturing fluid, which achieves the effect of sealing and guiding the fracturing fluid at the connection between the sealing plate 42 and the mounting block 35.

[0063] Working principle: During use, fracturing fluid needs to be delivered through the first fracturing pipe 4 and the second fracturing pipe 9. The fracturing fluid enters the inner hose 13 through the first fracturing pipe 4, and then enters the interior of the second fracturing pipe 9 through the inner hose 13. When it is necessary to change the delivery direction of the fracturing fluid, the handle 6 is turned to drive the adjusting gear 28 to rotate, thereby driving the adjusting rack 29 and the sliding cylinder 17 to pull one of the steel cables 18, tightening one end of the steel cable 18. Multiple support rings 19 compress multiple tension springs 22 on the steel cable 18, thereby causing the inner hose 13 and outer hose 2 at the location of the steel cable 18 to bend inward. While the multiple support rings 19 compress the tension springs 22, they also compress the inner metal frame 20 and the outer metal frame 21. The inner metal frame 20 and outer metal frame 21 deform under compression. The inner metal frame 20 supports the inner hose 13. Due to the corrosive nature of the fracturing fluid, the inner hose 13 seals the internal fracturing fluid. The outer metal frame 21 supports the outer hose 2, which isolates it from the external environment. This changes the bending direction of the outer hose 2, allowing for rapid adjustment of the fracturing fluid delivery direction by utilizing multiple adjusting and flexible mechanisms. After stretching the steel cable 18, the rotation of the adjusting gear 28 and the sliding of the adjusting rack 29 tighten the cable 18. During the rotation of the adjusting gear 28, the adjusting gear 28 actuates the adjusting block 34.When the adjusting block 34 rotates, it compresses the spring 30. After the steel cable 18 is tightened to the predetermined position, the handle 6 is released. The adjusting gear 28 reverses under the pull of the steel cable 18 and the adjusting rack 29. Due to the design of the adjusting block 34 and the rotating plate 33, the rotating plate 33 is always in contact with the adjusting block 34. When the adjusting gear 28 reverses, the adjusting block 34 will lock the adjusting gear 28, preventing it from reversing and fixing the position of the steel cable 18 and the adjusting gear 28. This stabilizes the bending direction of the outer hose 2. When it is necessary to reverse the adjusting gear 28, the adjusting rod 27 is rotated, causing the rotating seat 31 to rotate 180 degrees, thereby driving the adjusting block 34 to rotate. 4. Rotate 180 degrees to reverse the position of the adjusting block 34. At this time, the adjusting gear 28 squeezes the adjusting block 34 and the rotating plate 33, thereby squeezing the compression spring 30. The adjusting gear 28 reverses. When it is necessary to adjust the rotation direction of the adjusting gear 28 again, rotate the adjusting rod 27 again. This achieves the effect of flexibly adjusting the loosening and tightening of the steel cable 18. Due to the high pressure and high flow rate of the fracturing fluid, at the connection between the second fracturing pipe 9 and the first fracturing pipe 4 and the outer hose 2, the rapid flow of the fracturing fluid impacts the inner walls of the outer hose 2, the first fracturing pipe 4 and the second fracturing pipe 9. The internal pressure of the fracturing fluid squeezes the outer hose 2, the first fracturing pipe 4 and the second fracturing pipe 9. The pipe 9 exerts an outward force on the first fracturing pipe 4 and the second fracturing pipe 9. This force pulls the first fracturing pipe 4 and the second fracturing pipe 9 outward, thereby pulling the wedge block 38 to slide outward. The wedge block 38 is wedge-shaped, and the resistance increases as the wedge block 38 slides outward. This causes the upper clamping plate 39 and the lower clamping plate 41 to rotate relative to each other, clamping the edges of the first fracturing pipe 4 and the second fracturing pipe 9. This ensures that the upper clamping plate 39 and the lower clamping plate 41 are tightly connected to the first fracturing pipe 4 and the second fracturing pipe 9, respectively. The design of the wedge teeth 44 and the fixed teeth 45 ensures that the wedge block 38 can only slide outward and not inward, thus utilizing the pressure of the fracturing fluid to tightly connect the pipes. As the wedge block 38 slides, it drives the sealing rack 37 to slide, which in turn drives the intermediate gear 36 and the incomplete gear 43 to rotate. This causes the sealing plate 42 to rotate outward, pressing the upper surface of the sealing plate 42 against the lower surface of the base plate 40, eliminating the gap between the sealing plate 42 and the base plate 40. Simultaneously, it causes the sealing sleeve 16 to open outward, increasing its diameter and allowing it to fit tightly against the lower surface of the sealing plate 42. As the fracturing fluid flows through the sealing sleeve 16, the streamlined shape of the sealing plate 42 better guides the flow of the fracturing fluid, effectively sealing and guiding the fracturing fluid at the connection between the sealing plate 42 and the mounting block 35.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A streamlined flexible connection structure for a high-pressure, high-flow-rate, large-diameter fracturing hose, comprising a first fixing ring (1), characterized in that, A housing (10) is fixedly connected to one side of the first fixing ring (1), and an outer hose (2) is fixedly connected to the other side of the first fixing ring (1). A second fixing ring (3) is provided at one end of the outer hose (2). A first fracturing tube (4) is provided on one side of the second fixing ring (3). A plurality of first fixing bolts (5) are provided on the outer wall of the second fixing ring (3). A second fracturing tube (9) is provided at one end of the housing (10). A base (11) is provided at the bottom of the first fixing ring (1). Tensioning structures are respectively installed at one end of the outer shell (10) and the second fixing ring (3). The tensioning structures are used to seal the edges of the outer shell (10) and the second fixing ring (3) by using the pressure at the connection between the outer shell (10) and the second fixing ring (3) and the tensioning structure, so as to prevent the liquid from leaking from the first fixing ring (1), the outer hose (2), the second fixing ring (3), the first fracturing tube (4), the second fracturing tube (9) and the inside of the outer shell (10). The outer hose (2) is equipped with a flexible mechanism inside, and an inner hose (13) is provided inside the flexible mechanism. The flexible mechanism is used to change the bending direction of the outer hose (2) and cooperates with the tensioning structure to change the flow direction of the fracturing fluid. The outer surface of the outer shell (10) is equipped with multiple adjustment mechanisms, which work together with the flexible mechanism to ensure the stability of the flexible mechanism; The tensioning structure is equipped with a sealing mechanism inside. The sealing mechanism works with the tensioning structure to seal the edges of the tensioning structure with the first fracturing tube (4) and the second fracturing tube (9) respectively.

2. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 1, characterized in that, The tensioning structure includes a mounting ring (14) fixedly connected to one end of the outer shell (10) and the second fixing ring (3). Multiple mounting blocks (35) are fixedly connected to the inner surface of the mounting ring (14). The multiple mounting blocks (35) are arranged in a circular pattern on the inner surface of the mounting ring (14). A base plate (40) is fixedly connected to one side of the mounting block (35). Multiple pressing plates (8) are provided on the outer surface of the mounting ring (14). Multiple second fixing bolts (15) are provided at the connection between the pressing plate (8) and the mounting ring (14). A wedge block (38) is provided between the pressing plate (8) and the base plate (40). An upper clamping plate (39) and a lower clamping plate (41) are rotatably connected to one side of the wedge block (38).

3. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 2, characterized in that, One end of the second fracturing tube (9) is located between the upper clamping plate (39) and the lower clamping plate (41). The first groove and the second groove are respectively provided on the edge of one end of the pressing plate (8) and the bottom plate (40). An inner sealing ring (47) is provided inside the first groove, and an outer sealing ring (48) is provided on the inner wall of the second groove. Multiple fixing teeth (45) are respectively provided at the bottom of the pressing plate (8) and the top of the bottom plate (40) near the wedge block (38). Multiple safety teeth (46) are respectively provided on the lower surface of the upper clamping plate (39) and the upper surface of the lower clamping plate (41). Multiple wedge teeth (44) are respectively provided on the upper surface and the lower surface of the wedge block (38).

4. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 3, characterized in that, The flexible mechanism includes multiple steel cables (18) inserted into the other side of the first fixed ring (1). Multiple first fixed rods (23) and second fixed rods (24) are fixedly connected at the connection between the first fixed ring (1) and the outer hose (2). Multiple support rings (19) are slidably connected from one end of the steel cable (18) to the other end.

5. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 4, characterized in that, Tensioning springs (22) are respectively provided between the support rings (19), and the tensioning springs (22) are sleeved on the steel cable (18). Multiple support rings (19) are located between the first fixed ring (1) and the second fixed ring (3). The outer edges of the support rings (19) are respectively fixedly connected to the outer metal frame (21), and the inner edges of the support rings (19) are respectively fixedly connected to the inner metal frame (20).

6. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 5, characterized in that, The adjustment mechanism includes a plurality of fixed blocks (12) fixedly connected to the outer wall of the housing (10). The surface of the fixed block (12) is provided with a mounting shell (7). An adjustment gear (28) is rotatably connected inside the mounting shell (7). A handle (6) is fixedly connected to the upper surface of the adjustment gear (28). An adjustment block (34) is rotatably connected to the side of the mounting shell (7) near the adjustment gear (28).

7. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 6, characterized in that, A fixing frame (32) is fixedly connected to the inside of the mounting shell (7) near the adjusting block (34). A rotating seat (31) is rotatably connected inside the fixing frame (32). A rotating plate (33) is rotatably connected to one end of the rotating seat (31). A compression spring (30) is provided between the rotating plate (33) and the rotating seat (31). An adjusting rod (27) is fixedly connected to the other end of the rotating seat (31). An adjusting rack (29) is slidably connected inside the mounting shell (7) on the other side of the adjusting gear (28).

8. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 7, characterized in that, One end of the adjusting rack (29) is fixedly connected to a sliding cylinder (17), the sliding cylinder (17) is fixedly connected to one end of the steel cable (18), one end of the sliding cylinder (17) is slidably connected to an mounting cylinder (25), and one end of the mounting cylinder (25) is fitted with a buffer spring (26).

9. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 8, characterized in that, The sealing mechanism includes a sealing rack (37) fixedly connected to the other side of the wedge block (38). An intermediate gear (36) and an incomplete gear (43) are rotatably connected inside the mounting block (35). The sealing rack (37) meshes with the intermediate gear (36), and the intermediate gear (36) meshes with the incomplete gear (43). A sealing plate (42) is fixedly connected to one side of the incomplete gear (43).

10. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 9, characterized in that, The lower surface of the sealing plate (42) is streamlined, and the upper surface of the sealing plate (42) is in close contact with the lower surface of the base plate (40). A sealing sleeve (16) is provided on the lower surface of the sealing plate (42), and the sealing sleeve (16) serves to seal the connection between the sealing plate (42) and the mounting block (35).

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