A locking structure for a long pipe joint

Abstract

The invention discloses a long tube pipe joint locking structure, which comprises a gear meshing active mechanism, an external hexagonal joint supporting member for supporting an external hexagonal component of a sealing joint, and a movable expansion locking mechanism for locking the external hexagonal pipe joint. The movable expansion locking mechanism has two states, an expansion state and a closing state. When in the expansion state, it has a flared opening with a diameter larger than the diameter of a circumscribed circle of the external hexagonal pipe joint. A pre-connecting member formed by pre-connecting the sealing joint, the external hexagonal pipe joint, and a long tube passes through the flared opening, and the external hexagonal pipe joint is located in the flared opening, or an assembly member formed by assembling the sealing joint, the external hexagonal pipe joint, and the long tube is taken out through the flared opening. When in the closing state, it has a hexagonal locking ring matched with the external hexagonal pipe joint. After the movable expansion locking mechanism is self-locked, the gear meshing active mechanism drives the movable expansion locking mechanism to rotate so that the external hexagonal pipe joint is tightened to a standard torque. The advantage is that it can effectively improve the locking efficiency of the long tube pipe joint.

Description

Technical Field

[0001] The invention relates to a joint locking facility, in particular to a long pipe joint locking structure. Background Art

[0002] Figure 7 A schematic diagram of the exploded structure of the sealing joint and the long pipe (oil pipe) before assembly is given. At present, the long pipe joint locking device used by many manufacturers when connecting the sealing joint 100 and the long pipe 200 usually includes a hydraulic motor, a pinion, a gear, and a hexagonal flange. The output shaft of the hydraulic motor is connected to the pinion, the pinion is meshed with the gear, the hexagonal flange is arranged in the inner hole of the gear, and the hexagonal hole of the hexagonal flange is matched with the pipe joint 300 (i.e., the hexagonal pipe joint) of the outer hexagonal structure. When the sealing joint 100 and the long tube 200 need to be assembled, the pipe joint 300 with an external hexagonal structure is placed in the internal hexagonal hole of the internal hexagonal flange, one end of the pipe joint 300 with an external hexagonal structure is pre-connected with the sealing joint 100, and the other end of the pipe joint 300 with an external hexagonal structure is pre-connected with the threaded connection end 201 of the long tube 200. The hydraulic motor drives the small gear to drive the large gear to rotate to rotate the pipe joint 300 with the external hexagonal structure, and stops after tightening to the standard torque, so that the sealing joint 100 and the long tube 200 are assembled through the pipe joint 300. This long tube pipe joint locking device has a simple structure and is easy to use. However, after the sealing joint 100 and the long tube 200 are assembled through the pipe joint 300, since the hexagons of the outer hexagonal component 101 on the sealing joint 100 and the pipe joint 300 with an outer hexagonal structure are generally not at the same angle, when taking out the assembled long tube 200, the inner hexagonal flange must be removed first, which makes the operation very cumbersome, thereby reducing the locking efficiency of the long tube pipe joint; in addition, the pipe joint 300 with an outer hexagonal structure must first be placed in the inner hexagonal hole of the inner hexagonal flange before pre-connection, which brings inconvenience to the pre-connection operation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a long tube joint locking structure, which can effectively improve the locking efficiency of the long tube joint.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a long tube pipe joint locking structure, including a gear meshing active mechanism, characterized in that it also includes an external hexagonal joint support for supporting the external hexagonal component of the sealing joint and a movable expansion locking mechanism for locking the external hexagonal pipe joint, the movable expansion locking mechanism has two states, an expanded state and a closed state, the movable expansion locking mechanism has a flared opening with a diameter greater than the diameter of the circumscribed circle of the external hexagonal pipe joint when in the expanded state, and has a hexagonal opening adapted to the external hexagonal pipe joint when in the closed state. shaped locking ring, when the movable expansion and locking mechanism is in the expanded state, the pre-connected part formed by the pre-connection of the sealing joint, the external hexagonal pipe joint and the long tube passes through the expanded opening and the external hexagonal pipe joint is located in the expanded opening, or the assembled part formed by the sealing joint, the external hexagonal pipe joint and the long tube is taken out through the expanded opening; when the movable expansion and locking mechanism is in the closed state, the hexagonal locking ring fits with the outer peripheral wall of the external hexagonal pipe joint, and after the movable expansion and locking mechanism is self-locked, the gear meshing active mechanism drives the movable expansion and locking mechanism to rotate so that the external hexagonal pipe joint is tightened to the standard torque.

[0005] The gear meshing active mechanism is composed of a hydraulic motor, a driving gear, and a locking gear. The diameter of the inner hole of the locking gear is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint. The output shaft of the hydraulic motor is connected to the driving gear, and the driving gear is meshed with the locking gear. The hydraulic motor outputs power to drive the driving gear to drive the locking gear to rotate, and the locking gear drives the movable expansion locking mechanism to rotate. It is required that the diameter of the inner hole of the locking gear is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint, so that after assembly, even if the hexagon of the external hexagonal pipe joint and the hexagon of the external hexagonal component of the sealing joint are not at the same angle, the assembled assembly can be easily removed.

[0006] The movable expansion locking mechanism consists of a washer and six locking plates, the diameter of the inner hole of the washer being larger than the diameter of the circumscribed circle of the external hexagonal pipe joint, a connecting pin being fixed on the inner end of the locking plate, the end head of the inner end of the locking plate being designed as a semicircular structure as a locking head, a locking platform being arranged on one side of the locking plate close to the locking head, a locking groove of a semicircular structure being arranged in the middle of the same side of the locking plate, the outer end of the locking plate extending to the middle being provided with a long strip slide groove, six fixing pins being evenly arranged along the circumferential direction on an end face of an axial end of the locking gear, the fixing pins being adapted to the long strip slide groove, six connecting holes being evenly arranged along the circumferential direction on the washer, the six locking plates being centered on the center of the washer and the locking head being evenly distributed radially around the center, the connecting pins being movably connected to the connecting holes one by one, and making the locking head tightly fit against an end face of an axial end of the washer, each The free end of each of the fixing pins passes through one of the elongated slide grooves and is located at the inner end of the elongated slide groove, and the other axial end face of the washer is coaxially and tightly attached to the axial end face opposite to the locking gear; when the locking head faces the center of the washer and the free end of the fixing pin is located at the inner end of the elongated slide groove, the movable expansion locking mechanism is in an expanded state, and at this time, the space surrounded by all the locking heads forms the flared opening; the washer is rotated so that the locking head in one of the two adjacent locking plates is completely embedded in the locking groove in the other locking plate, and the free end of the fixing pin slides from the inner end of the elongated slide groove to the outer end of the elongated slide groove, and at this time, the movable expansion locking mechanism is in a closed state, and all the locking platforms form an inner hexagonal structure and the surfaces of all the locking platforms form the hexagonal locking ring. The movable expansion and locking mechanism has a simple structure, and the expansion state and the closing state can be easily switched. During operation, one of the connecting pins can be manually pushed to rotate the washer from the expansion state to the closing state, and then the washer can be rotated in the opposite direction to switch from the closing state to the expansion state. The diameter of the inner hole of the washer is required to be larger than the diameter of the circumscribed circle of the external hexagonal pipe joint. In this way, after assembly is completed, even if the hexagon of the external hexagonal pipe joint and the hexagon of the external hexagonal component of the sealing joint are not at the same angle, the assembled assembly can be easily taken out.

[0007] A self-locking structure is provided between the washer and any of the locking plates, and the self-locking structure includes a locking pin, six first locking holes uniformly provided on the washer along the circumference of the washer, and a second locking hole provided on any of the locking plates. When the movable expansion locking mechanism is in the closed state, the second locking hole is directly opposite to one of the first locking holes, and the locking pin is inserted into the second locking hole and the first locking hole to realize the self-locking of the movable expansion locking mechanism. The self-locking structure can be used to maintain the movable expansion locking mechanism in the closed state. When the external hexagonal pipe joint is tightened to the standard torque, the locking pin can be pulled out, and then the washer is rotated to disengage the lock head from the lock groove, and the movable expansion locking mechanism is transformed from the closed state to the expanded state. For the convenience of processing, a second locking hole can be provided on each locking plate, so that the locking pin can be inserted into any pair of the second locking holes and the first locking holes directly opposite to each other, and self-locking is more convenient.

[0008] One end of the outer hexagon joint support is provided with an inner hexagon support hole, and the outer hexagon component of the sealing joint is placed in the inner hexagon support hole. The outer hexagon component of the sealing joint is placed in the inner hexagon support hole, so that the sealing joint can be fixed when the outer hexagon joint support is fixed.

[0009] Compared with the prior art, the advantages of the present invention are:

[0010] When the movable expansion and locking mechanism of the locking structure of the long tube joint is in the expansion state, since the diameter of the expansion port is greater than the diameter of the circumscribed circle of the outer hexagonal tube joint, on the one hand, even if the outer hexagonal component of the sealing joint and the hexagonal component of the outer hexagonal tube joint in the pre-connected part formed by the pre-connection of the sealing joint, the outer hexagonal tube joint and the long tube are not at the same angle, the pre-connected part can easily pass through the expansion port, and the pre-connected operation can be performed first, which is more convenient; on the other hand, even if the outer hexagonal component of the sealing joint and the hexagonal component of the outer hexagonal tube joint in the assembly part formed by the assembly of the sealing joint, the outer hexagonal tube joint and the long tube are not at the same angle, the assembly part can also be easily taken out through the expansion port, which is easy to operate and greatly improves the locking efficiency of the long tube joint; when the movable expansion and locking mechanism is in the closed state, since the hexagonal locking ring fits the outer peripheral wall of the outer hexagonal tube joint, the rotation of the movable expansion and locking mechanism can cause the outer hexagonal tube joint to rotate together, and the assembly of the sealing joint, the outer hexagonal tube joint and the long tube is realized after the outer hexagonal tube joint is tightened to the standard torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The structure diagram of the long pipe joint locking structure of the present invention is used to assemble the sealing joint, the outer hexagonal pipe joint and the long pipe. Figure 1 ;

[0012] Figure 2The structure diagram of the long pipe joint locking structure of the present invention is used to assemble the sealing joint, the outer hexagonal pipe joint and the long pipe. Figure 2 ;

[0013] Figure 3 for Figure 1 and Figure 2 The decomposition structure of Figure 1 ;

[0014] Figure 4 for Figure 1 and Figure 2 The decomposition structure of Figure 2 ;

[0015] Figure 5 It is a schematic diagram of the connection structure of all the locking pieces in the movable expansion locking mechanism in the locking structure of the long pipe joint of the present invention in the closed state;

[0016] Figure 6 It is a structural schematic diagram of a washer in a movable expansion locking mechanism in a locking structure of a long pipe joint of the present invention;

[0017] Figure 7 It is a schematic diagram of the exploded structure before the sealing joint and the long pipe (oil pipe) are assembled. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings.

[0019] The present invention provides a long pipe joint locking structure, such as Figures 1 to 6 As shown, it includes a gear meshing active mechanism 1, an outer hexagonal joint support 2 for supporting an outer hexagonal component 101 of a sealing joint 100, and a movable expansion locking mechanism 3 for locking an outer hexagonal pipe joint 300. The movable expansion locking mechanism 3 has two states: an expanded state and a closed state. When the movable expansion locking mechanism 3 is in the expanded state, it has a flared opening (not shown in the figure) with a diameter greater than the diameter of the circumscribed circle of the outer hexagonal pipe joint 300. When the movable expansion locking mechanism 3 is in the closed state, it has a hexagonal locking ring 32 that matches the outer hexagonal pipe joint 300. When the movable expansion locking mechanism 3 is in the expanded state, the sealing joint 1 00, the pre-connected part formed by the pre-connection of the external hexagonal pipe joint 300 and the long tube 200 passes through the flared opening and the external hexagonal pipe joint 300 is located in the flared opening; the movable expansion and locking mechanism 3 is in a closed state, the hexagonal locking ring 32 is in contact with the outer peripheral wall of the external hexagonal pipe joint 300, and after the movable expansion and locking mechanism 3 is self-locked, the gear meshing active mechanism 1 drives the movable expansion and locking mechanism 3 to rotate so that the external hexagonal pipe joint 300 is tightened to the standard torque; the movable expansion and locking mechanism 3 is in an expanded state again, the external hexagonal joint support 2 is removed, and the assembly formed by the sealing joint 100, the external hexagonal pipe joint 300 and the long tube 200 is taken out through the flared opening.

[0020] In this embodiment, the gear meshing active mechanism 1 is composed of a hydraulic motor (not shown in the figure), a driving gear (not shown in the figure), and a locking gear 11. The diameter of the inner hole 12 of the locking gear 11 is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint 300 (generally, the size of the external hexagonal pipe joint 300 is consistent with the size of the external hexagonal component 101 of the sealing joint 100. If the two are inconsistent, the diameter of the inner hole 12 of the locking gear 11 is larger than the diameter of the larger circumscribed circle of the two). The output shaft of the hydraulic motor is connected to the driving gear, and the driving gear is meshed with the locking gear 11. The hydraulic motor outputs power to drive the driving gear to drive the locking gear 11 to rotate, and the locking gear 11 drives the movable expansion locking mechanism 3 to rotate. It is required that the diameter of the inner hole 12 of the locking gear 11 is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint 300, so that after the assembly is completed, even if the hexagons of the external hexagonal pipe joint 300 and the hexagons of the external hexagonal component 101 of the sealing joint 100 are not at the same angle, the assembled assembly can be easily removed.

[0021] In this embodiment, the movable expansion locking mechanism 3 is composed of a washer 33 and six locking plates 34. The diameter of the inner hole 331 of the washer 33 is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint 300. A connecting pin 341 is fixed to the inner end of the locking plate 34. The end of the inner end of the locking plate 34 is designed as a semicircular structure as a locking head 342. A locking platform 343 is provided on one side of the locking plate 34 near the locking head 342. A semicircular locking groove 344 is provided in the middle of the same side of the locking plate 34. The locking plate 34 is 4 is extended to the middle part with a long strip slide groove 345, and six fixing pins 13 are evenly arranged on the upper surface of one shaft end of the locking gear 11 in the circumferential direction, and the fixing pins 13 are adapted to the long strip slide groove 345 and can slide in the long strip slide groove 345, and six connecting holes 332 are evenly arranged on the washer 33 in the circumferential direction, and the six locking pieces 34 are centered on the center of the washer 33 and the lock heads 342 are evenly distributed in a radial shape toward the center, and the connecting pins 341 correspond to the connecting holes 332 one by one. The movable connection is made so that the lock head 342 is in close contact with one axial end face of the washer 33, the free end of each fixing pin 13 passes through an elongated slot 345 and is located at the inner end of the elongated slot 345, and the other axial end face of the washer 33 is coaxially in close contact with the axial end face opposite to the locking gear 11; when the lock head 342 faces the center of the washer 33 and the free end of the fixing pin 13 is located at the inner end of the elongated slot 345, the movable expansion locking mechanism 3 is in an expanded state, at which time all the lock heads 342 The enclosed space forms an expansion mouth; the washer 33 is rotated so that the locking head 342 in one of the two adjacent locking plates 34 is completely embedded in the locking groove 344 in the other locking plate 34, and the free end of the fixing pin 13 slides from the inner end of the long strip slide groove 345 to the outer end of the long strip slide groove 345. At this time, the movable expansion locking mechanism 3 is in a closed state, all the locking platforms 343 form an inner hexagonal structure and the surfaces of all the locking platforms 343 form a hexagonal locking ring 32. The movable expansion locking mechanism 3 has a simple structure, and the expansion state and the closing state can be easily converted to each other. During operation, one of the connecting pins 341 can be manually pushed to rotate the washer 33 from the expansion state to the closing state, and then the washer 33 can be rotated in the opposite direction to convert from the closing state to the expansion state. The structure shown in the figure is that the washer 33 rotates clockwise from the expansion state to the closing state, and the washer 33 rotates counterclockwise from the closing state to the expansion state; the diameter of the inner hole 331 of the washer 33 is required to be larger than the diameter of the circumscribed circle of the external hexagonal pipe joint 300, so that after the assembly is completed, even if the hexagon of the external hexagonal pipe joint 300 and the hexagon of the external hexagonal component 101 of the sealing joint 100 are not at the same angle, the assembled assembly parts can be easily taken out.

[0022] In this embodiment, a self-locking structure 35 is provided between the washer 33 and any one of the locking plates 34. The self-locking structure 35 includes a locking pin 351, six first locking holes 352 uniformly arranged on the washer 33 along the circumference of the washer 33, and a second locking hole 353 arranged on any one of the locking plates 34. When the movable expansion locking mechanism 3 is in a closed state, the second locking hole 353 is opposite to one of the first locking holes 352, and the locking pin 351 is inserted into the second locking hole 353 and the first locking hole 352 to realize the self-locking of the movable expansion locking mechanism 3. The self-locking structure 35 can be used to maintain the movable expansion locking mechanism 3 in a closed state. When the external hexagonal pipe joint 300 is tightened to the standard torque, the locking pin 351 can be pulled out, and then the washer 33 is rotated to disengage the locking head 342 from the locking groove 344, and the movable expansion locking mechanism 3 is transformed from the closed state to the expanded state. For the convenience of processing, a second locking hole 353 can be opened on each locking plate 34, so that the locking pin 351 can be inserted into any pair of the second locking hole 353 and the first locking hole 352 that are opposite to each other, and self-locking is more convenient.

[0023] In this embodiment, an inner hexagonal support hole 21 is formed at one end of the outer hexagonal joint support member 2, and the outer hexagonal component 101 of the sealing joint 100 is placed in the inner hexagonal support hole 21. The outer hexagonal component 101 of the sealing joint 100 is placed in the inner hexagonal support hole 21, so that the sealing joint 100 can be ensured to be fixed when the outer hexagonal joint support member 2 is fixed.

[0024] When using the long tube joint locking structure to assemble the sealing joint 100, the external hexagonal pipe joint 300, and the long tube 200, the locking gear 11 is usually placed vertically, that is, the axis of the locking gear 11 is parallel to the horizontal plane. Regardless of whether the movable expansion locking mechanism 3 is in the expanded state or the closed state, the washer 33 and the locking gear 11 can always be coaxial through the cooperation of the fixing pin 13 and the long strip slide groove 345.

Claims

1. A long pipe joint locking structure, comprising a gear meshing active mechanism, characterized in that: It also includes an external hexagonal joint support for supporting the external hexagonal component of the sealing joint and a movable expansion and locking mechanism for locking the external hexagonal pipe joint. The movable expansion and locking mechanism has two states: an expanded state and a closed state. When the movable expansion and locking mechanism is in the expanded state, it has a flared opening with a diameter greater than the diameter of the circumscribed circle of the external hexagonal pipe joint. When the movable expansion and locking mechanism is in the closed state, it has a hexagonal locking ring that matches the external hexagonal pipe joint. When the movable expansion and locking mechanism is in the expanded state, The pre-connected part formed by the pre-connection of the sealing joint, the external hexagonal pipe joint and the long tube passes through the flared opening, and the external hexagonal pipe joint is located in the flared opening, or the assembly formed by the sealing joint, the external hexagonal pipe joint and the long tube is taken out through the flared opening; when the movable expansion locking mechanism is in a closed state, the hexagonal locking ring fits with the outer peripheral wall of the external hexagonal pipe joint, and after the movable expansion locking mechanism is self-locked, the gear meshing active mechanism drives the movable expansion locking mechanism to rotate so that the external hexagonal pipe joint is tightened to the standard torque; The movable expansion locking mechanism is composed of a washer and six locking plates. The diameter of the inner hole of the washer is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint. A connecting pin is fixed on the inner end of the locking plate. The end head of the inner end of the locking plate is designed as a semicircular structure as a locking head. A locking platform is provided on one side of the locking plate close to the locking head. A locking groove with a semicircular structure is provided in the middle of the same side of the locking plate. Six connecting holes are evenly arranged along the circumferential direction of the washer. The six locking plates are centered on the center of the washer and the locking heads are evenly distributed radially toward the center. The connecting pins are movably connected to the connecting holes one by one, and the locking head is tightly attached to an end face of an axial end of the washer.

2. A long pipe joint locking structure according to claim 1, characterized in that: The gear meshing active mechanism is composed of a hydraulic motor, a driving gear, and a locking gear. The diameter of the inner hole of the locking gear is larger than the diameter of the circumscribed circle of the external hexagonal pipe joint. The output shaft of the hydraulic motor is connected to the driving gear, and the driving gear is meshed with the locking gear. The hydraulic motor outputs power to drive the driving gear to rotate the locking gear, and the locking gear drives the movable expansion locking mechanism to rotate.

3. A long pipe joint locking structure according to claim 2, characterized in that: The outer end of the locking plate extends to the middle part and is provided with a long strip slot. Six fixing pins are evenly arranged on the circumferential direction on the end face of one shaft end of the locking gear. The fixing pins are adapted to the long strip slot. The free end of each fixing pin passes through one of the long strip slots and is located at the inner end of the long strip slot, and the other shaft end face of the washer is coaxially and tightly attached to the shaft end face opposite to the locking gear. When the locking head faces the center of the washer and the free end of the fixing pin is located at the inner end of the long strip slot, the movable expansion The locking mechanism is in an expanded state, at which time the space surrounded by all the locking heads forms the expanded opening; the washer is rotated so that the locking head in one of the two adjacent locking plates is completely embedded in the locking groove in the other locking plate, and the free end of the fixing pin slides from the inner end of the elongated slide groove to the outer end of the elongated slide groove. At this time, the movable expansion locking mechanism is in a closed state, all the locking platforms form an inner hexagonal structure and the surfaces of all the locking platforms form the hexagonal locking ring.

4. A long pipe joint locking structure according to claim 3, characterized in that: A self-locking structure is provided between the washer and any one of the locking plates, and the self-locking structure includes a locking pin, six first locking holes evenly arranged on the washer along the circumference of the washer, and a second locking hole arranged on any one of the locking plates. When the movable expansion locking mechanism is in a closed state, the second locking hole is directly opposite to one of the first locking holes, and the locking pin is inserted into the second locking hole and the first locking hole to realize the self-locking of the movable expansion locking mechanism.

5. A long pipe joint locking structure according to any one of claims 1 to 4, characterized in that: One end of the outer hexagonal joint support piece is provided with an inner hexagonal support hole, and the outer hexagonal component of the sealing joint is placed in the inner hexagonal support hole.

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