Streamline flexible connection structure of high-pressure high-flow-rate large-diameter fracturing hose

Abstract

The invention discloses a streamline flexible connection structure of a high-pressure high-flow-rate large-diameter fracturing hose, and relates to the technical field of flexible connection of fracturing hoses, the streamline flexible connection structure comprises a first fixing ring, a shell is fixedly connected to one side of the first fixing ring, an outer hose is fixedly connected to the other side of the first fixing ring, and a second fixing ring is arranged at one end of the outer hose; a first fracturing pipe is arranged on one side of the second fixing ring, a plurality of first fixing bolts are arranged on the outer wall of the second fixing ring, and a second fracturing pipe is arranged at one end of the shell. According to the streamline flexible connecting structure of the high-pressure high-flow-speed large-diameter fracturing hose, one end of the steel cable is tightened, so that the inner hose and the outer hose at the position where the steel cable is located are driven to bend inwards, fracturing fluid needs to be conveyed to which direction, and the multiple adjusting mechanisms and the flexible mechanisms are matched, so that the fracturing fluid is conveyed to the outside. The bending direction of the outer hose is changed, and the effect of rapidly adjusting the conveying direction of fracturing fluid is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible connection of fracturing hoses, in particular to a streamlined flexible connection structure of a high-pressure high-flow-rate large-diameter fracturing hose. BACKGROUND

[0002] Large-diameter fracturing hose technology plays an important role in oil and gas exploration, especially in hydraulic fracturing operations. With the increasing demand for oil and gas resource development, the progress of fracturing technology promotes the research and application of large-diameter hoses that can withstand high-pressure and high-flow-rate fracturing fluid, ensuring the safety and effectiveness of fracturing operations. Fracturing fluid is usually composed of water, sand and chemical additives, and its properties include high viscosity, good fluidity and chemical stability, which help to improve the fracture conductivity of rock and thus improve resource exploration efficiency.

[0003] Although large-diameter fracturing hoses have significant advantages in efficient transmission of fracturing fluid, there are some operational deficiencies in actual application. Generally, when the direction of fracturing fluid transmission by the fracturing hose needs to be changed, the connection mechanism must be disassembled. This process is complex and time-consuming and labor-intensive, usually requiring the cooperation of multiple workers, increasing the complexity and safety hazards of the operation. Frequent disassembly and reconnection can cause hose wear, affecting its service life and transmission efficiency. In addition, liquid leakage may occur during disassembly, further reducing work efficiency, which cannot meet the actual needs. SUMMARY

[0004] The present application discloses a streamlined flexible connection structure of a high-pressure high-flow-rate large-diameter fracturing hose, which aims to solve the technical problem that generally, when the direction of fracturing fluid transmission by the fracturing hose needs to be changed, the connection mechanism must be disassembled. This process is complex and time-consuming and labor-intensive, usually requiring the cooperation of multiple workers, increasing the complexity and safety hazards of the operation. Frequent disassembly and reconnection can cause hose wear, affecting its service life and transmission efficiency. In addition, liquid leakage may occur during disassembly, further reducing work efficiency.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A streamlined flexible connection structure of a high-pressure high-flow-rate large-diameter fracturing hose, comprising a first fixed ring, one side of the first fixed ring is fixedly connected with an outer shell, the other side of the first fixed ring is fixedly connected with an outer hose, one end of the outer hose is provided with a second fixed ring, one side of the second fixed ring is provided with a first fracturing pipe, a plurality of first fixed bolts are arranged on the outer wall of the second fixed ring, one end of the outer shell is provided with a second fracturing pipe, and the bottom of the first fixed ring is provided with a base.

[0007] The outer shell and one end of the second fixing ring are respectively provided with a tightening structure, which is used to seal the edges of the outer shell and the second fixing ring by the pressure at the connection between the outer shell, the second fixing ring and the tightening structure, so as to prevent the liquid in the first fixing ring, the outer hose, the second fixing ring, the first fracturing pipe, the second fracturing pipe and the outer shell from leaking;

[0008] The outer hose is internally provided with a flexible mechanism, which is internally provided with an inner hose, and is used to change the bending direction of the outer hose and cooperate with the tightening structure, so as to change the flow direction of the fracturing fluid.

[0009] The outer surface of the outer shell is provided with a plurality of adjusting mechanisms, which work with the flexible mechanism to ensure the stability of the flexible mechanism.

[0010] The tightening structure is internally provided with a sealing mechanism, which cooperates with the tightening structure to seal the edges of the first fracturing pipe and the second fracturing pipe, respectively.

[0011] The tightening structure comprises a mounting ring fixedly connected to one end of the outer shell and the second fixing ring, the inner side surface of the mounting ring is fixedly connected with a plurality of mounting blocks, the mounting blocks are circularly arranged on the inner side surface of the mounting ring, one side of the mounting block is fixedly connected with a bottom plate, the outer side surface of the mounting ring is provided with a plurality of pressing plates, the connection between the pressing plate and the mounting ring is provided with a plurality of second fixing bolts, the wedge-shaped block is provided between the pressing plate and the bottom plate, one side of the wedge-shaped block is respectively rotatably connected with an upper clamping plate and a lower clamping plate.

[0012] One end of the second fracturing pipe is located between the upper clamping plate and the lower clamping plate, one end edge of the pressing plate and the bottom plate is respectively provided with a first recess and a second recess, the first recess is internally provided with an inner sealing ring, and the inner wall of the second recess is provided with an outer sealing ring, the bottom of the pressing plate and the top of the bottom plate are respectively provided with a plurality of fixed teeth near the position of the wedge-shaped block, the lower surface of the upper clamping plate and the upper surface of the lower clamping plate are respectively provided with a plurality of safety teeth, and the upper surface and the lower surface of the wedge-shaped block are respectively provided with a plurality of wedge-shaped teeth.

[0013] In a preferred scheme, the flexible mechanism comprises a plurality of steel wires inserted into the other side of the first fixing ring, the connection between the first fixing ring and the outer hose is respectively fixedly connected with a plurality of first fixing rods and second fixing rods, and a plurality of support rings are slidably connected from one end to the other end of the steel wire.

[0014] Tension springs are respectively arranged between the support rings, the tension springs are sleeved on the steel wires, the plurality of support rings are located between the first fixing ring and the second fixing ring, the outer side edges of the support rings are respectively fixedly connected with outer metal frames, and the inner side edges of the support rings are respectively fixedly connected with inner metal frames.

[0015] In a preferred scheme, the adjusting mechanism comprises a plurality of fixed blocks fixedly connected to the outer wall of the shell, the surface of the fixed blocks is provided with a mounting shell, the inside of the mounting shell is rotatably connected with an adjusting gear, the upper surface of the adjusting gear is fixedly connected with a handle, and the inside of the mounting shell is rotatably connected with an adjusting block at the position close to the adjusting gear.

[0016] The inside of the mounting shell is fixedly connected with a fixed frame at the position close to the adjusting block, the inside of the fixed frame is rotatably connected with a rotating seat, one end of the rotating seat is rotatably connected with a rotating piece, a compression spring is arranged between the rotating piece and the rotating seat, the other end of the rotating seat is fixedly connected with an adjusting rod, and the inside of the mounting shell is slidably connected with an adjusting rack at the position on the other side of the adjusting gear.

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

[0018] When the adjusting gear needs to be reversed, the rotating seat is driven to rotate by one hundred and eighty degrees by rotating the adjusting rod, so that the adjusting block is driven to rotate by one hundred and eighty degrees, the position of the adjusting block is reversed, at this time, the adjusting gear is extruded by the adjusting block and the rotating piece, so that the compression spring is extruded, the adjusting gear is reversed, and when the rotating direction of the adjusting gear needs to be adjusted again, the adjusting rod is rotated again, so that the effect of flexibly adjusting the loosening and tensioning of the steel cable is achieved.

[0019] In a preferred scheme, the sealing mechanism comprises a sealing rack fixedly connected to the other side of the wedge-shaped block, the inside of the mounting block is rotatably connected with an intermediate gear and an incomplete gear, the sealing rack is meshed with the intermediate gear, the intermediate gear is meshed with the incomplete gear, and one side of the incomplete gear is fixedly connected with a sealing plate.

[0020] The lower surface of the sealing plate is in a streamline shape, the upper surface of the sealing plate is tightly attached to the lower surface of the bottom plate, the lower surface of the sealing plate is provided with a sealing sleeve, and the sealing sleeve plays a sealing role at the connecting position of the sealing plate and the mounting block.

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

[0022] 1、Through rotating the handle to drive the adjusting gear to rotate, thereby driving the adjusting rack and the sliding cylinder to pull one of the steel cables, so that one end of the steel cable is tightened, and the plurality of supporting rings are used to press the plurality of tension springs on the steel cable, thereby driving the inner hose and the outer hose at the position of the steel cable to bend inward, and the direction in which the fracturing fluid needs to be delivered is determined, and the plurality of adjusting mechanisms and the flexible mechanism are used in cooperation to change the bending direction of the outer hose, so that the effect of quickly adjusting the delivery direction of the fracturing fluid is achieved.

[0023] 2、After the steel cable is stretched, the steel cable is pulled tight through the rotation of the adjusting gear and the sliding of the adjusting rack, and in the process of rotating the adjusting gear, the adjusting gear drives the adjusting block, the adjusting block rotates and presses the compression spring, and after the steel cable is tightened to the predetermined position, the handle is released, the adjusting gear is reversed under the pulling of the steel cable and the adjusting rack, and due to the design of the adjusting block and the rotating piece, the rotating piece is always attached to the adjusting block, when the adjusting gear is reversed, the adjusting block will stop the adjusting gear, so that the adjusting gear cannot be reversed, the position of the steel cable and the adjusting gear is fixed, and the effect of stabilizing the bending direction of the outer hose is achieved.

[0024] 3、Due to the pressure of the fracturing fluid pressing the outer hose, the first fracturing pipe and the second fracturing pipe, the first fracturing pipe and the second fracturing pipe are subjected to an outward force, which pulls the first fracturing pipe and the second fracturing pipe to move outward, thereby pulling the wedge-shaped block to slide outward, the wedge-shaped block is wedge-shaped, the resistance increases as the wedge-shaped block slides outward, thereby driving the upper clamping plate and the lower clamping plate to rotate relatively to clamp the edges of the first fracturing pipe and the second fracturing pipe, so that the upper clamping plate and the lower clamping plate are tightly connected with the first fracturing pipe and the second fracturing pipe respectively, the design of the wedge-shaped teeth and the fixed teeth makes the wedge-shaped block only slide outward and cannot slide inward, and the effect of tightly connecting the pipes by using the pressure of the fracturing fluid is achieved.

[0025] 4、During the sliding of the wedge-shaped block, the sealing plate is driven to rotate outward, so that the upper surface of the sealing plate presses the lower surface of the bottom plate, eliminating the gap between the sealing plate and the bottom plate, and at the same time, the sealing sleeve is driven to open outward, the diameter of the sealing sleeve becomes larger, and the sealing sleeve is tightly attached to the lower surface of the sealing plate, when the fracturing fluid flows through the sealing sleeve, the streamlined shape of the sealing plate better guides the flow of the fracturing fluid, and the effect of sealing and guiding the fracturing fluid at the connection between the sealing plate and the mounting block is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure is proposed in the present application.

[0027] Figure 2 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure is proposed in the present application.

[0028] Figure 3A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure overall sectional view structure schematic diagram is provided for the present application.

[0029] Figure 4 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure local sectional view structure schematic diagram is provided for the present application.

[0030] Figure 5 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure adjusting gear structure schematic diagram is provided for the present application.

[0031] Figure 6 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure sliding cylinder structure schematic diagram is provided for the present application.

[0032] Figure 7 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure adjusting block structure schematic diagram is provided for the present application.

[0033] Figure 8 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure mounting block structure schematic diagram is provided for the present application.

[0034] Figure 9 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure sealing plate structure schematic diagram is provided for the present application.

[0035] Figure 10 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure inner sealing ring structure schematic diagram is provided for the present application.

[0036] Figure 11 A high-pressure high-flow-rate large-diameter fracturing hose streamline flexible connection structure wedge block structure schematic diagram is provided for the present application.

[0037] In the figure: 1, the first fixed ring; 2, the outer hose; 3, the second fixed ring; 4, the first fracturing pipe; 5, the first fixed bolt; 6, the handle; 7, the mounting shell; 8, the pressing plate; 9, the second fracturing pipe; 10, the shell; 11, the base; 12, the fixed block; 13, the inner hose; 14, the mounting ring; 15, the second fixed bolt; 16, the sealing sleeve; 17, the sliding cylinder; 18, the steel cable; 19, the support ring; 20, the inner metal frame; 21, the outer metal frame; 22, the tension spring; 23, the first fixed rod; 24, the second fixed rod; 25, the mounting cylinder; 26, the buffer spring; 27, the adjusting rod; 28, the adjusting gear; 29, the adjusting rack; 30, the compression spring; 31, the rotating seat; 32, the fixed frame; 33, the rotating piece; 34, the adjusting block; 35, the mounting block; 36, the intermediate gear; 37, the sealing rack; 38, the wedge-shaped block; 39, the upper clamping plate; 40, the bottom plate; 41, the lower clamping plate; 42, the sealing plate; 43, the incomplete gear; 44, the wedge-shaped tooth; 45, the fixed tooth; 46, the safety tooth; 47, the inner sealing ring; 48, the outer sealing ring. DETAILED DESCRIPTION

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

[0039] The disclosed flexible connection structure of the high-pressure high-flow-rate large-diameter fracturing hose is mainly applied to the scene that the connection mechanism must be disassembled when the direction of the fracturing liquid transmission of the fracturing hose needs to be changed. The steps of this process are complex and time-consuming and laborious, and usually require the cooperation of multiple workers to complete, increasing the complexity and safety hazards of the operation. Frequent disassembly and reconnection can cause the hose to wear, thereby affecting its service life and transmission efficiency. In addition, liquid leakage may occur during the disassembly process, further reducing work efficiency.

[0040] REFERENCE Figure 1 Figure 11 The disclosed flexible connection structure of the high-pressure high-flow-rate large-diameter fracturing hose, comprising a first fixed ring 1, one side of the first fixed ring 1 is fixedly connected with a shell 10, the other side of the first fixed ring 1 is fixedly connected with an outer hose 2, one end of the outer hose 2 is provided with a second fixed ring 3, one side of the second fixed ring 3 is provided with a first fracturing pipe 4, a plurality of first fixed bolts 5 are arranged on the outer wall of the second fixed ring 3, one end of the shell 10 is provided with a second fracturing pipe 9, the bottom of the first fixed ring 1 is provided with a base 11.

[0041] ​The outer shell 10 and one end of the second fixing ring 3 are respectively provided with a tightening structure, which is used to seal the edges of the outer shell 10 and the second fixing ring 3 by the pressure at the connection between the outer shell 10 and the second fixing ring 3 and the tightening structure, so as to prevent the liquid in the first fixing ring 1, the outer hose 2, the second fixing ring 3, the first fracturing pipe 4, the second fracturing pipe 9 and the outer shell 10 from leaking;

[0042] The outer hose 2 is internally provided with a flexible mechanism, which is internally provided with an inner hose 13, and is used to change the bending direction of the outer hose 2 and cooperate with the tightening structure, so as to change the flow direction of the fracturing fluid.

[0043] The outer surface of the outer shell 10 is provided with a plurality of adjusting mechanisms, which work with the flexible mechanism to ensure the stability of the flexible mechanism.

[0044] The tightening structure is internally provided with a sealing mechanism, which cooperates with the tightening structure to seal the edges of the first fracturing pipe 4 and the second fracturing pipe 9, respectively.

[0045] The tightening structure comprises a mounting ring 14 fixedly connected to one end of the outer shell 10 and the second fixing ring 3, a plurality of mounting blocks 35 fixedly connected to the inner side surface of the mounting ring 14, the mounting blocks 35 being circularly arranged on the inner side surface of the mounting ring 14, a bottom plate 40 fixedly connected to one side of the mounting block 35, a plurality of pressing plates 8 arranged on the outer side surface of the mounting ring 14, a plurality of second fixing bolts 15 arranged at the connection between the pressing plate 8 and the mounting ring 14, a wedge block 38 arranged between the pressing plate 8 and the bottom plate 40, and an upper clamping plate 39 and a lower clamping plate 41 rotatably connected to one side of the wedge block 38, respectively.

[0046] One end of the second fracturing pipe 9 is located between the upper clamping plate 39 and the lower clamping plate 41, a first recess and a second recess are arranged at the edges of one end of the pressing plate 8 and the bottom plate 40, respectively, an inner sealing ring 47 is arranged in the first recess, an outer sealing ring 48 is arranged on the inner wall of the second recess, a plurality of fixed teeth 45 are arranged at the positions close to the wedge block 38 on the bottom of the pressing plate 8 and the top of the bottom plate 40, respectively, a plurality of safety teeth 46 are arranged on the lower surface of the upper clamping plate 39 and the upper surface of the lower clamping plate 41, respectively, and a plurality of wedge teeth 44 are arranged on the upper surface and the lower surface of the wedge block 38, respectively.

[0047] In this embodiment, the fracturing fluid needs to be transported by 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 inside of the second fracturing pipe 9 through the inner hose 13.

[0048] Wherein, due to the high pressure and fast flow of the fracturing fluid, the fast 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 at the connection between the second fracturing pipe 9 and the first fracturing pipe 4 and the outer hose 2, the pressure inside the fracturing fluid extrudes the outer hose 2, the first fracturing pipe 4 and the second fracturing pipe 9, so that the first fracturing pipe 4 and the second fracturing pipe 9 are subjected to an outward force, which pulls the first fracturing pipe 4 and the second fracturing pipe 9 to move outward, thereby pulling the wedge block 38 to slide outward.

[0049] Further, the wedge block 38 is wedge-shaped, and the more the wedge block 38 slides outward, the greater the resistance, thereby driving the upper clamping plate 39 and the lower clamping plate 41 to rotate relative to each other to clamp the edges of the first fracturing pipe 4 and the second fracturing pipe 9, so that the upper clamping plate 39 and the lower clamping plate 41 are tightly connected with the first fracturing pipe 4 and the second fracturing pipe 9 respectively, and the design of the wedge teeth 44 and the fixed teeth 45 allows the wedge block 38 to only slide outward and not inward, thereby achieving the effect of tightly connecting the pipes by using the pressure of the fracturing fluid.

[0050] Referring to 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 wires 18 inserted into the other side of the first fixed ring 1, a plurality of 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 respectively, and a plurality of support rings 19 are slidingly connected from one end to the other end of the steel wire 18 respectively.

[0051] Tension springs 22 are arranged between the support rings 19 respectively, the tension springs 22 are sleeved on the steel wire 18, the plurality of support rings 19 are located between the first fixed ring 1 and the second fixed ring 3, outer metal frames 21 are fixedly connected to the outer side edges of the support rings 19 respectively, and inner metal frames 20 are fixedly connected to the inner side edges of the support rings 19 respectively.

[0052] In this embodiment, when it is necessary to change the conveying direction of the fracturing fluid, the handle 6 is rotated 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 wires 18, so that one end of the steel wire 18 is tightened, the plurality of tension springs 22 on the steel wire 18 are extruded by the plurality of support rings 19, thereby driving the inner hose 13 and the outer hose 2 at the position of the steel wire 18 to bend inward.

[0053] Further, while the plurality of supporting rings 19 extrude the tension spring 22, the inner metal frame 20 and the outer metal frame 21 are extruded and deformed, the inner metal frame 20 supports the inner hose 13, the inner hose 13 seals the inner fracturing fluid due to the corrosive nature of the fracturing fluid, the outer metal frame 21 supports the outer hose 2, and the outer hose 2 insulates the external environment, so that the bending direction of the outer hose 2 is changed, the bending direction of the outer hose 2 is changed by the cooperation of the plurality of adjusting mechanisms and the flexible mechanism, and the fracturing fluid conveying direction is quickly adjusted.

[0054] With reference to Figure 1 、 Figure 5 、 Figure 6 and Figure 7 In a preferred embodiment, the adjusting mechanism comprises a plurality of fixed blocks 12 fixedly connected to the outer wall of the shell 10, the surface of the fixed block 12 is provided with a mounting shell 7, the inner part of the mounting shell 7 is rotatably connected with an adjusting gear 28, the upper surface of the adjusting gear 28 is fixedly connected with a handle 6, and the inner part of the mounting shell 7 is rotatably connected with an adjusting block 34 at a position close to the adjusting gear 28.

[0055] The inner part of the mounting shell 7 is fixedly connected with a fixed frame 32 at a position close to the adjusting block 34, the inner part of the fixed frame 32 is rotatably connected with a rotating seat 31, one end of the rotating seat 31 is rotatably connected with a rotating piece 33, the rotating piece 33 and the rotating seat 31 are provided with a compression spring 30, the other end of the rotating seat 31 is fixedly connected with an adjusting rod 27, and the inner part of the mounting shell 7 is slidably connected with an adjusting rack 29 at a position away from the adjusting gear 28.

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

[0057] In this embodiment, after the steel cable 18 is stretched, the steel cable 18 is tightened by rotating the adjusting gear 28 and sliding the adjusting rack 29, in the process of rotating the adjusting gear 28, the adjusting gear 28 drives the adjusting block 34 to rotate and extrude the compression spring 30, the handle 6 is released after the steel cable 18 is tightened to a predetermined position, and the adjusting gear 28 is reversed under the pulling of the steel cable 18 and the adjusting rack 29.

[0058] Further, due to the design of the adjusting block 34 and the rotating piece 33, the rotating piece 33 is always in contact with the adjusting block 34, when the adjusting gear 28 is reversed, the adjusting block 34 will block the adjusting gear 28, so that the adjusting gear 28 cannot be reversed, the position of the adjusting gear 28 and the steel cable 18 is fixed, and the effect of stabilizing the bending direction of the outer hose 2 is achieved.

[0059] In the embodiment, when the adjusting gear 28 needs to be reversed, the adjusting rod 27 is rotated to drive the rotating seat 31 to rotate by 180 degrees, so as to drive the adjusting block 34 to rotate by 180 degrees, and the position of the adjusting block 34 is reversed, at this time, the adjusting gear 28 is reversed by extruding the adjusting block 34 and the rotating piece 33, so as to extrude and compress the spring 30, and when the rotating direction of the adjusting gear 28 needs to be adjusted again, the adjusting rod 27 is rotated again, and the effect of flexibly adjusting and loosening the steel cable 18 is achieved.

[0060] Referring to Figure 4 , Figure 9 , Figure 10 and Figure 11 , in a preferred embodiment, the sealing mechanism comprises a sealing rack 37 fixedly connected to the other side of the wedge-shaped block 38, the inner part of the mounting block 35 is rotationally connected with an intermediate gear 36 and an incomplete gear 43 respectively, the sealing rack 37 is in mesh with the intermediate gear 36, the intermediate gear 36 is in mesh with the incomplete gear 43, and one side of the incomplete gear 43 is fixedly connected with a sealing plate 42.

[0061] The lower surface of the sealing plate 42 is streamlined, the upper surface of the sealing plate 42 is tightly attached to the lower surface of the bottom plate 40, and the lower surface of the sealing plate 42 is provided with a sealing sleeve 16, which plays a role in sealing the connection between the sealing plate 42 and the mounting block 35.

[0062] In the embodiment, in the sliding process of the wedge-shaped block 38, the wedge-shaped block 38 drives the sealing rack 37 to slide, 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 extrudes the lower surface of the bottom plate 40, eliminating the gap between the sealing plate 42 and the bottom plate 40, and at the same time, the sealing sleeve 16 is driven to open outward, the diameter of the sealing sleeve 16 becomes larger, the sealing sleeve 16 is tightly attached to the lower surface of the sealing plate 42, the streamlined shape of the sealing plate 42 better guides the flow of the fracturing fluid, and the effect of sealing and guiding the fracturing fluid at the connection between the sealing plate 42 and the mounting block 35 is achieved.

[0063] Working principle: when in use, the fracturing fluid needs to be transported by 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, enters the inside of the second fracturing pipe 9 through the inner hose 13, when the direction of the fracturing fluid transportation needs to be changed, the handle 6 is rotated 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, so that one end of the steel cable 18 is tightened, the plurality of supporting rings 19 are used to press the plurality of tension springs 22 on the steel cable 18, thereby driving the inner hose 13 and the outer hose 2 at the position of the steel cable 18 to bend inward, while the plurality of supporting rings 19 press the tension springs 22, the inner metal frame 20 and the outer metal frame 21 are pressed at the same time, the inner metal frame 20 and the outer metal frame 21 are deformed by being pressed, the inner metal frame 20 plays a supporting role for the inner hose 13, the inner hose 13 plays a sealing role for the inner fracturing fluid due to the corrosive nature of the fracturing fluid, the outer metal frame 21 plays a supporting role for the outer hose 2, and the outer hose 2 plays a role of isolating the external environment, so that the bending direction of the outer hose 2 is changed, the fracturing fluid needs to be transported in which direction, the plurality of adjusting mechanisms and the flexible mechanism are used to change the bending direction of the outer hose 2, so that the effect of quickly adjusting the direction of the fracturing fluid transportation is achieved, 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, in the process of the rotation of the adjusting gear 28, the adjusting gear 28 drives the adjusting block 34,When the handle 6 is loosened after the cable 18 is tightened to the predetermined position, the adjusting gear 28 is reversed under the pulling of the cable 18 and the adjusting rack 29. Due to the design of the adjusting block 34 and the rotating piece 33, the rotating piece 33 is always attached to the adjusting block 34. When the adjusting gear 28 is reversed, the adjusting block 34 will be clamped to the adjusting gear 28, so that the adjusting gear 28 cannot be reversed. The position of the cable 18 and the adjusting gear 28 is fixed, which can stabilize the bending direction of the outer hose 2. When the adjusting gear 28 needs to be reversed, the adjusting rod 27 is rotated by 180 degrees, so that the rotating seat 31 is rotated by 180 degrees, and the adjusting block 34 is rotated by 180 degrees. The position of the adjusting block 34 is reversed. At this time, the adjusting gear 28 is reversed by extruding the adjusting block 34 and the rotating piece 33, so that the spring 30 is compressed and tightened. The adjusting gear 28 is reversed. When the rotating direction of the adjusting gear 28 needs to be adjusted again, the adjusting rod 27 is rotated again, which can flexibly adjust the loosening and tightening of the cable 18. Due to the characteristics of high pressure and fast flow of the fracturing fluid, the fast 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 at the connection between the second fracturing pipe 9 and the first fracturing pipe 4 and the outer hose 2. The pressure inside the fracturing fluid extrudes the outer hose 2, the first fracturing pipe 4 and the second fracturing pipe 9, so that the first fracturing pipe 4 and the second fracturing pipe 9 are subjected to an outward force. The force pulls the first fracturing pipe 4 and the second fracturing pipe 9 to move outward, so that the wedge-shaped block 38 slides outward. The outer shape of the wedge-shaped block 38 is wedge-shaped. The greater the outward sliding of the wedge-shaped block 38, the greater the resistance. Thus, the upper clamping plate 39 and the lower clamping plate 41 are relatively rotated to clamp the edges of the first fracturing pipe 4 and the second fracturing pipe 9, so 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-shaped teeth 44 and the fixed teeth 45 makes the wedge-shaped block 38 only slide outward, not inward, which can tightly connect the pipes by using the pressure of the fracturing fluid. In the sliding process of the wedge-shaped block 38, the wedge-shaped block 38 drives the sealing rack 37 to slide, the sealing rack 37 drives the intermediate gear 36 and the incomplete gear 43 to rotate, so that the sealing plate 42 is rotated outward. The upper surface of the sealing plate 42 extrudes the lower surface of the bottom plate 40, so as to eliminate the gap between the sealing plate 42 and the bottom plate 40. At the same time, the sealing sleeve 16 is opened outward, the diameter of the sealing sleeve 16 is increased, 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 can better guide the flow of the fracturing fluid, which can seal and guide the fracturing fluid at the connection between the sealing plate 42 and the mounting block 35.

[0064] The above merely illustrates the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

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: One side of the first fixing ring (1) is fixedly connected to a housing (10), the other side of the first fixing ring (1) is fixedly connected to an outer hose (2), one end of the outer hose (2) is provided with a second fixing ring (3), one side of the second fixing ring (3) is provided with a first fracturing tube (4), a plurality of first fixing bolts (5) are provided on the outer wall of the second fixing ring (3), one end of the housing (10) is provided with a second fracturing tube (9), and the bottom of the first fixing ring (1) is provided with a base (11); One end of the shell (10) and the second fixing ring (3) are respectively provided with a tensioning structure, and the tensioning structure is used to seal the edges of the shell (10) and the second fixing ring (3) by utilizing the pressure at the connection between the shell (10) and the second fixing ring (3) and the tensioning structure, so as to prevent leakage of liquid inside 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 shell (10); A flexible mechanism is installed inside the outer hose (2), 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, so that the outer hose (2) is used to change the flow direction of the fracturing fluid; A plurality of adjustment mechanisms are installed on the outer surface of the housing (10), and the adjustment mechanisms work in conjunction with the flexible mechanism to ensure the stability of the flexible mechanism; A sealing mechanism is installed inside the tensioning structure, and the sealing mechanism cooperates with the tensioning structure to seal the tensioning structure with the edges of the first fracturing tube (4) and the second fracturing tube (9).

2. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 1 is characterized in that: The tensioning structure includes a mounting ring (14) fixedly connected to the housing (10) and one end of the second fixing ring (3), a plurality of mounting blocks (35) are fixedly connected to the inner surface of the mounting ring (14), and the plurality of mounting blocks (35) are arranged in a circular shape on the inner surface of the mounting ring (14), a bottom plate (40) is fixedly connected to one side of the mounting block (35), a plurality of pressing plates (8) are provided on the outer surface of the mounting ring (14), a plurality of 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 bottom plate (40), and 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), and one end edge of the pressing plate (8) and the bottom plate (40) are respectively provided with a first groove and a second groove, 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, and a plurality of 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), a plurality of 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), and a plurality of wedge-shaped 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 comprises a plurality of steel cables (18) plugged into the other side of the first fixing ring (1); a plurality of first fixing rods (23) and a second fixing rod (24) are fixedly connected to the connection between the first fixing ring (1) and the outer hose (2); and a plurality of support rings (19) are slidably connected from one end to the other end of the steel cables (18).

5. The streamlined flexible connection structure of a high-pressure, high-flow-rate, large-diameter fracturing hose according to claim 4, characterized in that: Tension springs (22) are respectively provided between the support rings (19), and the tension springs (22) are sleeved on the steel cable (18). The plurality of support rings (19) are located between the first fixing ring (1) and the second fixing 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 comprises a plurality of fixed blocks (12) fixedly connected to the outer wall of the housing (10); a mounting shell (7) is provided on the surface of the fixed block (12); an adjusting gear (28) is rotatably connected inside the mounting shell (7); a handle (6) is fixedly connected to the upper surface of the adjusting gear (28); and an adjusting block (34) is rotatably connected to a side of the mounting shell (7) near the adjusting 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 a position on one side of the mounting shell (7) near the adjusting block (34), a rotating seat (31) is rotatably connected to the interior of the fixing frame (32), a rotating piece (33) is rotatably connected to one end of the rotating seat (31), a compression spring (30) is provided between the rotating piece (33) and the rotating seat (31), an adjusting rod (27) is fixedly connected to the other end of the rotating seat (31), and an adjusting rack (29) is slidably connected to the interior of the mounting shell (7) at a position 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 a mounting cylinder (25), and one end of the mounting cylinder (25) is sleeved 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), and an intermediate gear (36) and an incomplete gear (43) are rotatably connected inside the mounting block (35). The sealing rack (37) is meshed with the intermediate gear (36), and the intermediate gear (36) is meshed 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 bottom 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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