Ultrahigh-pressure large-drift-diameter movable bend

Abstract

The invention relates to the technical field of high-pressure movable elbows, and discloses an ultrahigh-pressure large-drift-diameter movable elbow which comprises a first elbow body, a second elbow body, a sealing seat, a steel ball, a ball plug and a circlip for a hole, one end of the first elbow body is connected to one end of the second elbow body in a sleeving mode, and the first elbow body is rotationally connected with the second elbow body; the rotating gear drives the outer gear ring to rotate, the outer gear ring drives the first elbow body to synchronously rotate around the axis of the first elbow body, in the rotating process, the fixing frame is in rigid connection with the fixing ring through the connecting assembly, and a fixed supporting path is formed; the fixing frame is equivalent to a coaxial guide rail of the first elbow body, the first elbow body is forced to rotate only along the axis of the first elbow body without radial deviation, it is ensured that the axis of the first elbow body coincides with the axis of the second elbow body all the time, and sealing assembly abrasion and medium leakage caused by axis dislocation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure movable elbows, in particular to an ultra-high-pressure large-diameter movable elbow. Background Art

[0002] Ultra-high-pressure large-diameter flexible bends are core connecting components in industrial scenarios such as oil drilling, high-pressure fluid transportation, and mining hydraulics. They are mainly used to achieve flexible angle adjustment of ultra-high-pressure pipelines. They must not only withstand the impact load of high-pressure fluids, but also ensure the sealing reliability when the pipeline is turning, which directly determines the safe operation and operating efficiency of the entire transportation system.

[0003] In the practical application of ultra-high pressure large-diameter elbows, the angle adjustment of the two elbow bodies is a key operation link. The adjustment method directly affects the sealing life and operating stability of the elbow. When the two elbow bodies are manually bent for angle adjustment, due to the heavy weight and strong structural rigidity of the ultra-high pressure large-diameter movable elbow, it is difficult for the operator to accurately control the direction and strength of the force, which can easily cause the axes of the two elbow bodies to rotate out of alignment, that is, the central axes of the two elbow bodies cannot remain coincident during the adjustment process, but there is a radial offset or angular tilt. This axial rotation will directly act on the sealing assembly between the two elbow bodies: on the one hand, the sealing assembly needs to withstand the pressure of the ultra-high pressure fluid and the additional shear force caused by the axis misalignment at the same time, resulting in local excessive extrusion of the fitting surface between the seal and the sealing groove; on the other hand, the axis misalignment will cause the sealing assembly to produce uneven friction with the inner wall of the sealing groove during the rotation adjustment process, and the friction strength will be greatly increased. The surface of the seal is prone to damage such as scratches and chipping. Based on this, the present invention purposely provides an ultra-high pressure large-diameter movable elbow that can avoid axis misalignment caused by manual adjustment and reduce wear of the sealing assembly. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-high pressure large-diameter movable bend to address the shortcomings of the existing technology and solve the technical problems in the existing technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions: An ultra-high-pressure large-diameter movable elbow comprises a first elbow body, a second elbow body, a sealing seat, a steel ball, a ball plug, and an elastic retaining ring for a hole. One end of the first elbow body is sleeved on one end of the second elbow body, and the first elbow body and the second elbow body are rotatably connected. The first elbow body and the second elbow body are sealed by the sealing seat. A plurality of movable grooves are provided on the outer circumference of the second elbow body, each of which is provided with a steel ball, and a ball plug and an elastic retaining ring for a hole are provided in the movable groove. The ball plug and the elastic retaining ring for the hole are used to limit the steel ball. A fixing ring, the fixing ring is fixedly installed on the outer circular surface of the second elbow body, and the fixing ring is away from the connection between the first elbow body and the second elbow body, a fixing frame is sleeved on the outer circular surface of the first elbow body, the first elbow body is rotatably connected to the fixing frame, a connecting assembly is provided at the bottom of the fixing frame, the fixing frame establishes a rigid connection with the fixing ring through the connecting assembly, an outer gear ring is rotatably installed in the fixing frame, the inner wall of the outer gear ring is fixedly connected to the outer circular surface of the first elbow body, and the outer gear ring rotating shaft is coaxial with the first elbow body rotating shaft, a gear is rotatably installed in the fixing frame, the gear is meshed with the outer gear ring, and the gear rotating shaft is away from the first elbow body, and the gear is driven to rotate by the driving assembly.

[0006] As a further solution of the present invention: a first O-ring is provided on the outer circumference of the sealing seat, and a second O-ring is provided on the outer circumference of the second elbow body. The first O-ring and the second O-ring are used to seal the gap between the first elbow body and the second elbow body.

[0007] As a further solution of the present invention: the number of the connecting components is three, each connecting component includes a support rod, a protrusion, a nut and a reserved hole, the three reserved holes are all opened on the fixing ring, and the three reserved holes are arranged circumferentially, the support rod is fixedly installed on the bottom of the fixing frame, the protrusion is fixedly installed on the support rod, the diameter of the protrusion is larger than the diameter of the reserved hole, the bottom end of the support rod passes through the reserved hole, the nut is threadedly connected to the bottom end of the support rod, and the nut and the protrusion clamp the fixing ring.

[0008] As a further solution of the present invention: the driving assembly includes a cross slot, a straight-line rotating rod and a locking assembly, the cross slot is opened on the gear, the straight-line rotating rod is coaxially arranged with the gear, the top end of the straight-line rotating rod passes through the bottom of the fixed frame, the top end of the straight-line rotating rod is slidably installed in the cross slot, and the straight-line rotating rod is rotatably connected to the fixed frame, the straight-line rotating rod is driven to rotate by the first driving source, the locking assembly is arranged on the fixed frame, and the locking assembly is connected to the gear, when the locking assembly is connected to the gear, the gear is in a locked state.

[0009] As a further solution of the present invention: the locking assembly includes an I-shaped lifting block, a fixed cylinder and an I-shaped groove, the fixed cylinder is fixedly installed on the top of the fixed frame, the I-shaped groove is opened in the fixed cylinder, the I-shaped lifting block is slidably installed in the I-shaped groove, and the bottom end of the I-shaped lifting block is rotatably connected to the top of the I-shaped rotating rod, the I-shaped rotating rod is slidably installed on the fixed frame, and the I-shaped rotating rod is slidably connected to the cross slot. When the I-shaped rotating rod rises, the I-shaped lifting block is completely retracted into the I-shaped groove, and the gear is in an unlocked state. When the first driving source rotates the I-shaped rotating rod so that the cross slot is aligned with the I-shaped groove, the I-shaped rotating rod descends, so that the I-shaped rotating rod partially moves out of the cross slot and the I-shaped lifting block partially slides into the cross slot, and the gear is in a locked state.

[0010] As a further solution of the present invention: a conical ring is fixedly installed on the outer circular surface of the first elbow, and the radius of the conical ring decreases upward along the axial direction of the conical ring; a locking block is slidably sleeved on the outer circular surface of the first elbow, and the locking block is located above the conical ring. The locking block is driven to rise and fall by a second driving source, and a conical groove matching the conical ring is provided at the bottom of the locking block. When the second driving source drives the locking block to descend, the conical groove on the locking block abuts against the conical ring.

[0011] As a further solution of the present invention: an extension rod is fixedly installed on the locking block, and a round block is rotatably installed on the outer circular surface of the I-shaped rotating rod, and the bottom of the round block abuts against the top of the extension rod. When the second driving source drives the locking block to rise away from the conical ring, the extension rod drives the round block and the I-shaped rotating rod to rise synchronously, so that the I-shaped lifting block is completely retracted into the I-shaped groove. When the second driving source drives the locking block to descend, the weight of the I-shaped rotating rod causes the I-shaped rotating rod to descend.

[0012] As a further solution of the present invention: the top of the round block is connected to the bottom of the fixing frame through a spring, and the pre-tightening force of the spring causes the round block to descend, and when the round block rises, the spring is compressed.

[0013] Beneficial effects of the present invention: 1. In the present invention, the outer gear ring is driven to rotate by rotating the gear, and the outer gear ring drives the first elbow body to rotate synchronously around its own axis. During the rotation process, the fixed frame is rigidly connected to the fixed ring through the connecting assembly, forming a fixed support path. The fixed frame is equivalent to the coaxial guide track of the first elbow body, forcing the first elbow body to rotate only along its own axis without radial deviation, ensuring that the axes of the first elbow body and the second elbow body always coincide, avoiding the axis deviation problem caused by uneven force and uncontrolled force when the first elbow body is manually bent in the traditional way. The axis misalignment rate is minimized through rigid constraint and coaxial drive, avoiding wear of the sealing component and medium leakage caused by axis misalignment; 2. In the present invention, when the first elbow body and the second elbow body are plugged in, the bottom end of the support rod can be passed through the reserved hole, and then the protrusion abuts on the fixing ring, and finally the nut is threadedly connected to the bottom end of the support rod, thereby achieving rigid fixation of the support rod and the fixing ring, and then forming a support frame in which the fixing ring is fixedly connected to the fixing frame through the support rod. In this way, the plug-in installation method of the first elbow body and the second elbow body can be adapted, avoiding spatial interference during assembly, simplifying the process, and also having a detachable and separable feature, which is convenient for maintenance and replacement of the first elbow body, the second elbow body and the sealing assembly; 3. In the present invention, after the first elbow body is driven to adjust its angle by rotating the gear, not only can the first elbow body be locked quickly, but the gear can also be locked at the same time, forming multiple safety redundancies. Even if a certain locking link fails, the remaining structures can still ensure the stability of the angles of the first elbow body and the second elbow body, thereby minimizing the risk of accidental rotation under ultra-high pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the first elbow body and the second elbow body in the present invention; Figure 3 It is a structural schematic diagram of the first elbow body in the present invention; Figure 4 It is a schematic structural diagram of a horizontal cross-section of the fixing frame of the present invention; Figure 5 It is a schematic structural diagram of a vertical cross-section of the fixing frame of the present invention; Figure 6 This is a schematic structural diagram of a cross-section of a straight-line lifting block in the present invention; Figure 7 It is a schematic structural diagram of the gear and the straight-shaped rotating rod in the present invention.

[0016] In the figure: 1. First elbow body; 2. Second elbow body; 3. Sealing seat; 4. First O-ring; 5. Second O-ring; 6. Steel ball; 7. Ball plug; 8. Elastic retaining ring for hole; 9. Retaining ring; 10. Fixing frame; 11. Support rod; 12. Bump; 13. Nut; 14. Conical ring; 15. Locking block; 16. Outer gear ring; 17. Gear; 18. Cross groove; 19. I-shaped rotating rod; 20. I-shaped lifting block; 21. Fixing cylinder; 22. I-shaped groove; 23. Round block; 24. Extension rod; 25. Spring; 26. Turntable. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] See also Figures 1-7As shown, the present invention is an ultra-high pressure large-diameter movable bend, comprising a first elbow body 1, a second elbow body 2, a sealing seat 3, a steel ball 6, a ball plug 7 and a hole elastic circlip 8, one end of the first elbow body 1 is sleeved on one end of the second elbow body 2, and the first elbow body 1 and the second elbow body 2 are rotatably connected, the first elbow body 1 and the second elbow body 2 are sealed by the sealing seat 3, the outer circumferential surface of the second elbow body 2 is provided with a plurality of movable grooves, each of the movable grooves is provided with a steel ball 6, and the movable groove is provided with a ball plug 7 and a hole elastic circlip 8, the ball plug 7 and the hole elastic circlip 8 are used to limit the steel ball 6; A fixing ring 9 is fixedly mounted on the outer cylindrical surface of the second elbow body 2, and the fixing ring 9 is away from the connection between the first elbow body 1 and the second elbow body 2. A fixing frame 10 is sleeved on the outer cylindrical surface of the first elbow body 1, and the first elbow body 1 is rotatably connected to the fixing frame 10. A connecting assembly is provided at the bottom of the fixing frame 10, and the fixing frame 10 establishes a rigid connection with the fixing ring 9 through the connecting assembly. An outer gear ring 16 is rotatably mounted in the fixing frame 10, and the inner wall of the outer gear ring 16 is fixedly connected to the outer cylindrical surface of the first elbow body 1, and the rotating shaft of the outer gear ring 16 is coaxial with the rotating shaft of the first elbow body 1. A gear 17 is rotatably mounted in the fixing frame 10, and the gear 17 is meshed with the outer gear ring 16, and the rotating shaft of the gear 17 is away from the first elbow body 1, and the gear 17 is driven to rotate by the driving assembly.

[0019] Specifically, the outer circumference of the sealing seat 3 is covered with a first O-ring 4, and the outer circumference of the second elbow body 2 is covered with a second O-ring 5. The first O-ring 4 and the second O-ring 5 are used to seal the gap between the first elbow body 1 and the second elbow body 2.

[0020] Working principle of the present invention: It should be noted that the sealing seat 3 is installed in the butt gap between the first elbow body 1 and the second elbow body 2, and the first O-ring 4 is sleeved on the outer cylindrical surface of the sealing seat 3. At the same time, the second O-ring 5 is sleeved on the outer cylindrical surface of the second elbow body 2. Through the main sealing effect of the sealing seat 3 and the auxiliary sealing effect of the first O-ring 4 and the second O-ring 5, the gap between the first elbow body 1 and the second elbow body 2 is completely sealed to prevent leakage of ultra-high pressure fluid, and the fixing ring 9 is fixedly installed on the outer cylindrical surface of the second elbow body 2, and the fixing frame 10 is sleeved on the outer cylindrical surface of the first elbow body 1, so as to ensure that the fixing frame 10 can rotate freely relative to the first elbow body 1, and the fixing frame 10 is rigidly connected to the fixing ring 9 through the connecting assembly at the bottom of the fixing frame 10, which preliminarily constrains the alignment of the axes of the first elbow body 1 and the second elbow body 2; Adjust the angle of the first elbow body 1 and the second elbow body 2: First, start the external drive component to drive the gear 17 to rotate. The gear 17 transmits power to the outer ring gear 16 through the meshing relationship. Since the outer ring gear 16 is fixedly connected and coaxial with the first elbow body 1, the outer ring gear 16 drives the first elbow body 1 to rotate synchronously around its own axis. During the rotation process, the fixed frame 10 maintains a rigid connection with the fixed ring 9 through the connecting component, forming a fixed support path. The fixed frame 10 is equivalent to the coaxial guide track of the first elbow body 1, forcing the first elbow body 1 to rotate only along its own axis without radial deviation, ensuring that the axes of the first elbow body 1 and the second elbow body 2 always coincide with each other, and in this process, the steel ball 6, the ball plug 7, and the elastic retaining ring 8 in the movable groove on the outer cylindrical surface of the second elbow body 2 act synchronously, and the steel ball 6 moves slightly along the movable groove. The ball plug 7 and the elastic retaining ring 8 for the hole limit the transition displacement of the steel ball 6 through the limiting structure, buffer the vibration, and further stabilize the axis of the first elbow body 1 and the second elbow body 2. This adjustment method not only completely avoids the axis deviation problem caused by uneven force and uncontrolled force when the first elbow body 1 is manually bent in the traditional way, but also reduces the axis misalignment rate to a minimum through rigid constraint and coaxial drive, avoiding the wear of the sealing components and medium leakage caused by axis misalignment; more importantly, the gear 17, as an intermediate component for power transmission, has a rotational resistance much smaller than directly rotating the first elbow body 1, because the first elbow body 1 needs to bear the overall load of the ultra-high pressure pipeline, and the gear 17 only needs to transmit torque, making the angle adjustment operation more labor-saving, effectively reducing the workload of the operator, and ensuring the smoothness and accuracy of the adjustment process.

[0021] like Figures 1-3 As shown, as a preferred embodiment of the present invention, the number of the connecting components is three, and each connecting component includes a support rod 11, a protrusion 12, a nut 13 and a reserved hole. The three reserved holes are all opened on the fixing ring 9, and the three reserved holes are arranged circumferentially. The support rod 11 is fixedly installed on the bottom of the fixing frame 10, and the protrusion 12 is fixedly installed on the support rod 11. The diameter of the protrusion 12 is larger than the diameter of the reserved hole. The bottom end of the support rod 11 passes through the reserved hole. The nut 13 is threadedly connected to the bottom end of the support rod 11, and the nut 13 and the protrusion 12 clamp the fixing ring 9.

[0022] When the first elbow body 1 and the second elbow body 2 are plugged into each other, the first and second elbow bodies 1 are locked.

[0023] like Figures 1-7 As shown, as a preferred embodiment of the present invention, the driving assembly includes a cross slot 18, a straight rotating rod 19 and a locking assembly, the cross slot 18 is opened on the gear 17, the straight rotating rod 19 is coaxially arranged with the gear 17, the top end of the straight rotating rod 19 passes through the bottom of the fixed frame 10, the top end of the straight rotating rod 19 is slidably installed in the cross slot 18, and the straight rotating rod 19 is rotatably connected to the fixed frame 10, the straight rotating rod 19 is driven to rotate by the first driving source, the locking assembly is arranged on the fixed frame 10, and the locking assembly is connected to the gear 17. When the locking assembly is connected to the gear 17, the gear 17 is in a locked state.

[0024] Specifically, the locking assembly includes an I-shaped lifting block 20, a fixed cylinder 21 and an I-shaped groove 22. The fixed cylinder 21 is fixedly installed on the top of the fixed frame 10, and the I-shaped groove 22 is opened in the fixed cylinder 21. The I-shaped lifting block 20 is slidably installed in the I-shaped groove 22, and the bottom end of the I-shaped lifting block 20 is rotatably connected to the top of the I-shaped rotating rod 19. The I-shaped rotating rod 19 is slidably installed on the fixed frame 10, and the I-shaped rotating rod 19 is slidably connected to the cross groove 18. When the I-shaped rotating rod 19 rises, the I-shaped lifting block 20 is completely retracted into the I-shaped groove 22. At this time, the gear 17 is in an unlocked state. When the first driving source rotates the I-shaped rotating rod 19 so that the cross groove 18 is aligned with the I-shaped groove 22, the I-shaped rotating rod 19 descends, so that the I-shaped rotating rod 19 partially moves out of the cross groove 18 and the I-shaped lifting block 20 partially slides into the cross groove 18. At this time, the gear 17 is in a locked state.

[0025] Specifically, a conical ring 14 is fixedly mounted on the outer circumferential surface of the first elbow body 1, and the radius of the conical ring 14 decreases upward along the axial direction of the conical ring 14. A locking block 15 is slidably sleeved on the outer circumferential surface of the first elbow body 1. The locking block 15 is located above the conical ring 14. The locking block 15 is driven to rise and fall by a second driving source. A conical groove matching the conical ring 14 is provided at the bottom of the locking block 15. When the second driving source drives the locking block 15 to descend, the conical groove on the locking block 15 abuts against the conical ring 14.

[0026] A turntable 26 is coaxially fixedly mounted on the bottom end of the straight-line rotating rod 19 , and the locking block 15 is slidably mounted on the three support rods 11 .

[0027] In one case of this embodiment, the first driving source can be manually rotated. If manual rotation is selected, the turntable 26 can be rotated, and it is more convenient to drive the straight-line rotating rod 19 to rotate through the turntable 26. The second driving source can be an electric cylinder or an electric telescopic rod component. At this time, the electric cylinder can be fixedly installed on the fixed frame 10, and the movable end of the electric cylinder is fixedly connected to the top of the locking block 15. Other mechanisms that can realize lifting and lowering movements can also be selected. This embodiment does not make specific limitations here.

[0028] When this embodiment is actually used, the first step is to unlock the drive assembly and adjust the angle: in the initial state, the locking assembly puts the gear 17 in a locked state, that is, the turntable 26 coaxially fixed at the bottom end of the I-shaped rotating rod 19 remains stationary, the top part of the I-shaped rotating rod 19 descends and moves out of the cross slot 18 on the gear 17, and the I-shaped lifting block 20 partially slides and inserts into the cross slot 18, the I-shaped lifting block 20 is slidably installed in the I-shaped slot 22 of the fixed cylinder 21, and the fixed cylinder 21 is fixed to the top of the fixed frame 10, mainly through the plug-in cooperation of the I-shaped lifting block 20 and the cross slot 18 to limit the rotation of the gear 17; when it is necessary to adjust the angle of the first elbow body 1 and the second elbow body 2, first drive the I-shaped rotating rod 19 to slide upward along the fixed frame 10, here the I-shaped rotating rod 19 is rotatably connected and slides with the fixed frame 10 In coordination, the straight-line rotating rod 19 drives the straight-line lifting block 20 at the top to rise synchronously during the rising process, until the straight-line lifting block 20 is completely retracted into the straight-line groove 22, and at the same time, the top of the straight-line rotating rod 19 completely enters the cross groove 18, releasing the restriction of the straight-line lifting block 20 on the cross groove 18, and the gear 17 is switched to the unlocked state; then the first driving source drives the straight-line rotating rod 19 to rotate, and the straight-line rotating rod 19 drives the gear 17 to rotate through the cooperation between the top and the cross groove 18, and the gear 17 then transmits power to the outer gear ring 16 through the meshing relationship, and finally drives the first elbow body 1 to rotate around its own axis, thereby realizing the angle adjustment of the first elbow body 1 and the second elbow body 2. During the adjustment process, the fixing frame 10 ensures that the axes of the first elbow body 1 and the second elbow body 2 coincide with each other through the rigid connection between the connecting assembly and the fixing ring 9; After the angle adjustment is completed, the drive assembly switches to the locked state: the first drive source is stopped, and the straight-line rotating rod 19 is driven to slide downward along the fixed frame 10. During the descent of the straight-line rotating rod 19, the straight-line lifting block 20 is driven to descend synchronously. When the cross slot 18 is aligned with the straight-line slot 22, the straight-line rotating rod 19 continues to descend until it partially moves out of the cross slot 18. At the same time, the straight-line lifting block 20 partially slides out of the straight-line slot 22 and inserts into the cross slot 18. The rotation of the gear 17 is restricted again by the plug-in limit of the straight-line lifting block 20 and the cross slot 18. , so that the gear 17 remains locked, ensuring that the angles of the first elbow body 1 and the second elbow body 2 are fixed, and preventing the first elbow body 1 from accidentally rotating under ultra-high pressure conditions. In actual production, the common rotation angle of the first elbow body 1 and the second elbow body 2 is ninety degrees, so the cross groove 18 is designed to be cross-shaped, and the straight-line rotating rod 19 and the straight-line lifting block 20 are both straight-line shaped. When rotated ninety degrees, the straight-line groove 22 must be aligned with the cross groove 18, thereby achieving the locking effect, which can meet most actual production scenarios; In order to ensure that the locking effect can be achieved at various rotation angles: the conical ring 14 is fixed to the outer cylindrical surface of the first elbow body 1, and its radius decreases axially upward, and the locking block 15 is slidably sleeved on the outer cylindrical surface of the first elbow body 1 and is located above the conical ring 14; when the angles of the first elbow body 1 and the second elbow body 2 are adjusted to the right position, the second driving source is started, and the second driving source drives the locking block 15 to rise and fall downward along the guidance of the three support rods 11. During the descending process of the locking block 15, the conical groove at its bottom matching the conical ring 14 gradually approaches the conical ring 14 until the conical groove is tightly abutted against the outer surface of the conical ring 14; since the conical structure of the conical ring 14 is adapted to the conical groove of the locking block 15, a radial clamping force is generated by the conical surface cooperation after abutment, which further limits the radial deviation of the first elbow body 1, thus forming a double protection.

[0029] like Figures 1-7 As shown, as a preferred embodiment of the present invention, an extension rod 24 is fixedly mounted on the locking block 15, and a round block 23 is rotatably mounted on the outer circumferential surface of the I-shaped rotating rod 19, and the bottom of the round block 23 abuts against the top of the extension rod 24. When the second driving source drives the locking block 15 to rise away from the conical ring 14, the extension rod 24 drives the round block 23 and the I-shaped rotating rod 19 to rise synchronously, so that the I-shaped lifting block 20 is completely retracted into the I-shaped groove 22. When the second driving source drives the locking block 15 to descend, the weight of the I-shaped rotating rod 19 causes the I-shaped rotating rod 19 to descend.

[0030] Specifically, the top of the round block 23 is connected to the bottom of the fixing frame 10 through a spring 25. The pre-tightening force of the spring 25 causes the round block 23 to descend, and when the round block 23 rises, the spring 25 is compressed.

[0031] When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1 and the second elbow body 2. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the locking block 15 is lowered, the locking block 15 is driven downwards to lock the first elbow body 1. When the cam 22 is aligned with the I-shaped groove 22, the I-shaped rotating rod 19 descends synchronously with the round block 23 under the dual action of its own gravity and the preload force of the spring 25. During the descent of the I-shaped rotating rod 19, the I-shaped lifting block 20 is driven to slide out of the I-shaped groove 22. When the cross groove 18 is aligned with the I-shaped groove 22, the I-shaped lifting block 20 is partially inserted into the cross groove 18 and the I-shaped rotating rod 19 is partially moved out of the cross groove 18, and the gear 17 is locked again; when the rotation angle is not ninety degrees, the I-shaped lifting block 20 abuts against the top of the gear 17, and due to the preload force of the spring 25, the gear 17 cannot rotate, and it can also play the role of locking the gear 17, forming multiple safety redundancies. Even if a locking link fails, the remaining structures can still ensure the stability of the angles of the first elbow body 1 and the second elbow body 2, thereby reducing the risk of accidental rotation under ultra-high pressure conditions to a minimum.

[0032] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An ultra-high pressure large-diameter movable elbow, comprising a first elbow body (1), a second elbow body (2), a sealing seat (3), a steel ball (6), a ball plug (7) and a hole elastic retaining ring (8), characterized in that: One end of the first elbow body (1) is sleeved on one end of the second elbow body (2), and the first elbow body (1) and the second elbow body (2) are rotatably connected. The first elbow body (1) and the second elbow body (2) are sealed by a sealing seat (3). The outer surface of the second elbow body (2) is provided with a plurality of movable grooves, each of which is provided with a steel ball (6), and a ball plug (7) and a hole elastic retaining ring (8) are provided in the movable groove. The ball plug (7) and the hole elastic retaining ring (8) are used to limit the steel ball (6). A fixing ring (9) is fixedly mounted on the outer cylindrical surface of the second elbow body (2), and the fixing ring (9) is away from the connection between the first elbow body (1) and the second elbow body (2). A fixing frame (10) is sleeved on the outer cylindrical surface of the first elbow body (1), and the first elbow body (1) is rotatably connected to the fixing frame (10). A connecting assembly is provided at the bottom of the fixing frame (10), and the fixing frame (10) is rigidly connected to the fixing ring (9) through the connecting assembly. An outer gear ring (16) is rotatably mounted in the fixing frame (10), and the inner wall of the outer gear ring (16) is fixedly connected to the outer cylindrical surface of the first elbow body (1), and the rotating shaft of the outer gear ring (16) is coaxial with the rotating shaft of the first elbow body (1). A gear (17) is rotatably mounted in the fixing frame (10), and the gear (17) is meshed with the outer gear ring (16), and the rotating shaft of the gear (17) is away from the first elbow body (1), and the gear (17) is driven to rotate by the driving assembly.

2. The ultra-high pressure large diameter movable bend according to claim 1, characterized in that: A first O-ring (4) is sleeved on the outer circumference of the sealing seat (3), and a second O-ring (5) is sleeved on the outer circumference of the second elbow body (2). The first O-ring (4) and the second O-ring (5) are used to seal the gap between the first elbow body (1) and the second elbow body (2).

3. The ultra-high pressure large diameter movable bend according to claim 1, characterized in that: The number of the connecting components is three, and each connecting component includes a support rod (11), a protrusion (12), a nut (13) and a reserved hole. The three reserved holes are all opened on the fixing ring (9), and the three reserved holes are arranged circumferentially. The support rod (11) is fixedly mounted on the bottom of the fixing frame (10), and the protrusion (12) is fixedly mounted on the support rod (11). The diameter of the protrusion (12) is larger than the diameter of the reserved hole. The bottom end of the support rod (11) passes through the reserved hole. The nut (13) is threadedly connected to the bottom end of the support rod (11), and the nut (13) and the protrusion (12) clamp the fixing ring (9).

4. The ultra-high pressure large diameter movable bend according to claim 1, characterized in that: The driving assembly comprises a cross slot (18), a straight rotating rod (19) and a locking assembly, wherein the cross slot (18) is provided on the gear (17), the straight rotating rod (19) and the gear (17) are coaxially arranged, the top end of the straight rotating rod (19) passes through the bottom of the fixing frame (10), the top end of the straight rotating rod (19) is slidably mounted in the cross slot (18), and the straight rotating rod (19) is rotationally connected to the fixing frame (10), the straight rotating rod (19) is driven to rotate by a first driving source, the locking assembly is provided on the fixing frame (10), and the locking assembly is connected to the gear (17), and when the locking assembly is connected to the gear (17), the gear (17) is in a locked state.

5. The ultra-high pressure large diameter movable bend according to claim 4, characterized in that: The locking assembly comprises a straight lifting block (20), a fixed cylinder (21) and a straight groove (22), wherein the fixed cylinder (21) is fixedly mounted on the top of the fixed frame (10), the straight groove (22) is opened in the fixed cylinder (21), the straight lifting block (20) is slidably mounted in the straight groove (22), and the bottom end of the straight lifting block (20) is rotatably connected to the top end of the straight rotating rod (19), the straight rotating rod (19) is slidably mounted on the fixed frame (10), and the straight rotating rod (19) is connected to the cross The slot (18) is slidably connected. When the straight-line rotating rod (19) rises, the straight-line lifting block (20) is completely retracted into the straight-line slot (22). At this time, the gear (17) is in an unlocked state. When the first driving source rotates the straight-line rotating rod (19) so that the cross slot (18) is aligned with the straight-line slot (22), the straight-line rotating rod (19) descends, so that the straight-line rotating rod (19) partially moves out of the cross slot (18) and the straight-line lifting block (20) partially slides and inserts into the cross slot (18). At this time, the gear (17) is in a locked state.

6. The ultra-high pressure large diameter movable bend according to claim 5, characterized in that: A conical ring (14) is fixedly mounted on the outer circumferential surface of the first elbow body (1), and the radius of the conical ring (14) decreases upward along the axial direction of the conical ring (14). A locking block (15) is slidably sleeved on the outer circumferential surface of the first elbow body (1), and the locking block (15) is located above the conical ring (14). The locking block (15) is driven to rise and fall by a second driving source. A conical groove matching the conical ring (14) is provided at the bottom of the locking block (15). When the second driving source drives the locking block (15) to descend, the conical groove on the locking block (15) abuts against the conical ring (14).

7. The ultra-high pressure large diameter movable bend according to claim 6, characterized in that: An extension rod (24) is fixedly mounted on the locking block (15), and a round block (23) is rotatably mounted on the outer circumference of the I-shaped rotating rod (19). The bottom of the round block (23) abuts against the top of the extension rod (24). When the second driving source drives the locking block (15) to rise away from the conical ring (14), the extension rod (24) drives the round block (23) and the I-shaped rotating rod (19) to rise synchronously, so that the I-shaped lifting block (20) is completely retracted into the I-shaped groove (22). When the second driving source drives the locking block (15) to descend, the deadweight of the I-shaped rotating rod (19) causes the I-shaped rotating rod (19) to descend.

8. The ultra-high pressure large diameter movable bend according to claim 7, characterized in that: The top of the round block (23) is connected to the bottom of the fixing frame (10) via a spring (25). The pre-tightening force of the spring (25) causes the round block (23) to descend, and when the round block (23) rises, the spring (25) is compressed.

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