Quick connection and separation mechanism for forward and reverse power transmission between vertical shaft and hexagonal rod of drilling rig

Abstract

The present application discloses a connection and separation mechanism for forward and reverse power transmission between a vertical shaft of a drilling rig and a power head, which belongs to the field of core drilling rigs with integrated drilling tower mainframes and is used for power transmission during the lifting and lowering of the drilling tower. The bottom of the vertical shaft sleeve is equipped with a top rod seat, the vertical shaft is installed inside the vertical shaft sleeve, the top of the vertical shaft is connected to the lower joint through a universal coupling, and the lower joint is threaded with the upper joint; the lower joint is provided with a through hole and a clamping block, the reversal pin passes through the through hole and is plugged into the waist groove on the upper joint, and the tail of the reversal pin can be fixed on the clamping block; the upper joint is connected to the outer conical thread of the hexagonal rod through an inner conical thread, and a reversal hexagonal sleeve is sleeved on the outside of the hexagonal rod, the hexagonal hole of the reversal hexagonal sleeve fits the outer surface of the hexagonal rod, and the reversal hexagonal sleeve is fixed on the upper joint. It can realize the rapid connection and separation between the vertical shaft of the drilling rig and the hexagonal rod, and can realize the bidirectional power transmission of forward rotation and reverse rotation, so that the operation of the drilling rig becomes simple and helps to improve the construction efficiency.

Description

Technical Field

[0001] The present application belongs to the field of core drilling rigs with integrated drilling tower and mainframe, and more specifically, relates to a quick connection and separation mechanism for forward and reverse power transmission between a vertical shaft of a drilling rig and a hexagonal rod. Background Art

[0002] The mechanical core drilling rigs with integrated derrick mainframe currently used have two forms of rotary motion transmission from the vertical shaft to the hexagonal rod in the derrick. One is to install a spline telescopic universal coupling between the vertical shaft and the hexagonal rod, connect a screw rod at the lower end of the vertical shaft, and raise and lower the vertical shaft by shaking the screw rod, that is, when the derrick is lowered, the universal coupling is disengaged by shaking the screw rod, and when the derrick is erected, the screw rod is shaken until the spline shaft on the upper part of the universal coupling contacts the inner spline on the lower part, and then the vertical shaft is slowly rotated manually, and after the spline shaft holes are matched, the screw rod is shaken again to make the vertical shaft rise until the inner and outer splines of the universal coupling are fully engaged. Not only is the operation cumbersome, but it is also time-consuming and laborious.

[0003] The second form of rotation transmission is to connect the vertical shaft and the hexagonal rod through flange bolts. When the derrick is erected, the flange at the vertical shaft end is required to be aligned with the flange at the hexagonal rod end, and then the bolts are passed through the aligned flange holes for tightening. The above form is more time-consuming and labor-intensive than the method of using a spline telescopic universal coupling, and requires higher installation accuracy of the derrick.

[0004] During use, if the user encounters shallow hole drilling, frequent machine moving operations are required, and the drilling tower must be lowered and erected each time. The connection structure of the vertical shaft and the hexagonal rod in the above two traditional methods obviously cannot meet the above operation requirements, which not only causes inconvenience to the user during use, but also greatly affects the construction efficiency. Summary of the invention

[0005] The purpose of the present application is to provide a quick connection and separation mechanism for forward and reverse power transmission between the vertical shaft of the drilling rig and the hexagonal rod, which can realize quick connection and separation between the vertical shaft of the drilling rig and the hexagonal rod, and can realize bidirectional power transmission of forward rotation and reverse rotation, making it easier for customers to operate the drilling rig and helping to improve customers' construction efficiency.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] A quick connection and separation mechanism for forward and reverse power transmission between a vertical shaft of a drilling rig and a power head comprises a vertical shaft sleeve, a top rod seat is installed at the bottom of the vertical shaft sleeve, a vertical shaft sliding relative to the vertical shaft sleeve is installed inside the vertical shaft sleeve, one end of a universal coupling is fixed to the top of the vertical shaft, the other end of the universal coupling is connected to a lower joint, and the lower joint is connected to the outer conical thread of an upper joint through an inner conical thread; a through hole for a reversal pin to pass through is also processed on the lower joint, a clamping block is fixedly connected to the corresponding through hole, the reversal pin is inserted into the waist groove on the upper joint after passing through the through hole, and the tail of the reversal pin is fixed to the clamping block; the upper joint is connected to the outer conical thread of a hexagonal rod through an inner conical thread, a reversal hexagonal sleeve is sleeved on the outside of the hexagonal rod, the hexagonal hole of the reversal hexagonal sleeve fits the outer surface of the hexagonal rod, and the reversal hexagonal sleeve is fixed to the upper joint.

[0008] Furthermore, the end of the hexagonal rod described in the present application is fixedly connected with a reinforcing shaft, and the reinforcing shaft is located in an upper joint threadedly connected to the end of the hexagonal rod; a threaded hole is left at the end of the reinforcing shaft, and is connected to the locking plate by bolts through the threaded hole.

[0009] Furthermore, the locking piece described in the present application is located in a square groove reserved at the end of the upper joint.

[0010] Furthermore, the tail of the reversal pin described in the present application is fixed to the clamping block via a transverse pin.

[0011] Furthermore, the vertical shaft described in the present application is internally installed with a push rod sleeve that slides relatively therewith, and a spring is provided between the push rod sleeve and the universal coupling.

[0012] Furthermore, the push rod described in the present application passes through the push rod seat and is connected to the push rod sleeve, and the bottom of the push rod is fixed to the push rod seat by a hexagonal nut.

[0013] Furthermore, the upper joint described in the present application is connected to the outer tapered thread at the end of the hexagonal rod through a right-handed inner tapered thread.

[0014] Furthermore, the hexagonal rod described in the present application is located in a drilling tower, and a power head that transmits power to the hexagonal rod is also provided on the drilling tower.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] 1. This application improves the connection and separation mechanism between the vertical shaft and the hexagonal rod during the erection and lowering of the drilling rig, which can avoid the operation of manually cranking the screw or aligning the flange, making it easier for customers to operate the drilling rig and helping to improve their construction efficiency.

[0017] 2. The present application improves the connection mechanism between the vertical shaft and the hexagonal rod, thereby being able to achieve bidirectional power transmission between the forward rotation and reverse rotation of the drilling rig, and the power transmission has good stability.

[0018] 3. This application cleverly utilizes the high strength and automatic centering characteristics of the tapered thread of the oil drill pipe, and applies it to the connection between the upper joint and the lower joint, and a universal coupling is installed between the lower joint and the vertical shaft, which can greatly reduce the drilling tower's requirements for installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of this application.

[0020] Figure 2 It is a schematic diagram of the connection and separation mechanism between the vertical axis and the hexagonal rod in this application.

[0021] Figure 3 yes Figure 2 Cross-sectional view of part A.

[0022] Figure 4 yes Figure 2 Cross-sectional view of part B.

[0023] Figure 5 yes Figure 2 Cross-sectional view of section C.

[0024] In the figure: 1. Hexagonal nut; 2. Push rod seat; 3. Push rod; 4. Push rod sleeve; 5. Spring; 6. Universal coupling; 7. Block; 8. Reversal pin; 9. Lower joint; 10. Locking plate; 11. Reinforcement shaft; 12. Upper joint; 13. Reversal hexagonal sleeve; 14. Hexagonal rod; 15. Vertical shaft; 16. Power head; 17. Drilling tower; 18. Vertical shaft sleeve. DETAILED DESCRIPTION

[0025] The technical solution described in this application is further described below in conjunction with the embodiments. It should be noted that the directional nouns that may be involved in the following paragraphs, including but not limited to "up, down, left, right, front, back", etc., are based on the visual directions shown in the corresponding drawings of the specification, and they should not and should not be regarded as limiting the scope of protection or technical solution of this application. Their purpose is only to facilitate those skilled in the art to better understand the technical solution created by the present invention.

[0026] In the description of this specification, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example 1

[0027] A quick connection and separation mechanism for forward and reverse power transmission between a vertical shaft and a hexagonal rod of a drilling rig comprises a vertical shaft sleeve 18, a top rod seat 2 is installed at the bottom of the vertical shaft sleeve 18, a vertical shaft 15 sliding relative to the vertical shaft sleeve 18 is installed inside the vertical shaft sleeve 18, one end of a universal coupling 6 is fixed to the top of the vertical shaft 15, and the other end of the universal coupling 6 is connected to a lower joint 9, and the lower joint 9 is connected to the outer conical thread of an upper joint 12 through an inner conical thread; a through hole for a reversing pin 8 to pass through is also processed on the lower joint 9, and a clamping block 7 is fixedly connected to the corresponding through hole, and the reversing pin 8 is inserted into the waist groove on the upper joint 12 after passing through the through hole, and the tail of the reversing pin 8 can be fixed on the clamping block 7; the upper joint 12 is connected to the outer conical thread of a hexagonal rod 14 through an inner conical thread, and a reversing hexagonal sleeve 13 is sleeved on the outside of the hexagonal rod 14, the hexagonal hole of the reversing hexagonal sleeve 13 fits the outer surface of the hexagonal rod 14, and the reversing hexagonal sleeve 13 is fixed on the upper joint 12. Example 2

[0028] A quick connection and separation mechanism for forward and reverse power transmission between a vertical shaft of a drilling rig and a hexagonal rod, wherein the end of the hexagonal rod 14 is fixedly connected with a reinforcing shaft 11, and the reinforcing shaft 11 is located in an upper joint 12 threadedly connected to the end of the hexagonal rod 14; a threaded hole is reserved at the end of the reinforcing shaft 11, and is bolted to a locking plate 10 through the threaded hole. The locking plate 10 is located in a square groove reserved at the end of the upper joint 12. The tail of the reversing pin 8 can be fixed to the clamping block 7 through a cross pin. A push rod sleeve 4 is installed inside the vertical shaft 15 to slide relative to it, and a spring 5 is provided between the push rod sleeve 4 and the universal coupling 6. The push rod 3 is connected to the push rod sleeve 4 after passing through the push rod seat 2, and the push rod 3 is connected to the push rod seat 2 through a hexagonal nut 1; the upper joint 12 is connected to the outer cone thread at the end of the hexagonal rod 14 through a right-handed inner cone thread. The structure and connection relationship of the remaining parts are the same as those described in any one of the above embodiments, and in order to avoid cumbersome text, they are not repeated here. Example 3

[0029] A quick connection and separation mechanism for forward and reverse power transmission between a vertical shaft of a drilling rig and a hexagonal rod, wherein the hexagonal rod 14 is located in a drilling tower 17, and a power head 16 for transmission with the hexagonal rod 14 is also provided on the drilling tower 17. The structure and connection relationship of the remaining parts are the same as those described in any one of the aforementioned embodiments, and will not be described here in order to avoid cumbersome text.

[0030] On the basis of the above embodiments, the present application continues to provide a detailed description of the technical features involved therein and the functions and roles played by the technical features in the present application, so as to help technicians in this field to fully understand the technical solution of the present application and reproduce it.

[0031] The main principle of the present application is that the upper joint 12 and the lower joint 9 are a pair of right-handed external tapered threads and internal tapered threads of the oil drill pipe that cooperate with each other. When the drilling tower 17 is erected and lowered, the connection and separation of the mechanical rotary motion transmitted to the power head 16 on the drilling tower 17 through the vertical shaft 15 is realized by connecting and disconnecting the tapered threads of the upper joint 12 and the lower joint 9. When the drilling tower is erected, the vertical shaft 15 performs positive rotary motion, and the rotating lower joint 9 can be automatically screwed on the upper joint 12 under the action of the elastic auxiliary mechanism, thereby quickly connecting and completing the mechanical rotary motion transmitted to the power head 16 on the drilling tower 17 through the vertical shaft 15.

[0032] When the vertical shaft 15 needs to make a reverse rotation movement, the reverse pin 8 needs to be inserted into the waist groove of the upper joint 12 through the through hole on the lower joint 9, and the tail of the reverse pin 8 is fixed in the clamping block 7 through the cross pin. The reverse rotation movement of the vertical shaft 15 will make the tapered thread connection between the lower joint 9 and the upper joint 12 invalid, and the power needs to be transmitted through the reverse pin 8.

[0033] When the upper joint 12 needs to be separated from the lower joint 9, it is only necessary to remove the reversing pin 8 from the through hole of the lower joint 9, and the vertical shaft 15 performs a reverse rotation movement, so that the taper thread connection between the upper joint 12 and the lower joint 9 fails, and the rotating lower joint 9 can be separated from the upper joint 12. When falling back, it is only necessary to slightly press the elastic auxiliary mechanism where the lower joint 9 is located until it does not affect the separation trajectory of the upper joint 12.

[0034] like Figure 1 , Figure 2 As shown, the present application discloses a connection and separation mechanism for forward and reverse power transmission between the vertical shaft of a drilling rig and a power head, wherein a push rod seat 2 is fixed to the lower end of a vertical shaft sleeve 18 by bolts. A hexagonal nut 1 is welded to the outside of the center hole of the push rod seat 2, and the push rod sleeve 4 can slide freely in the inner cavity of the vertical shaft 15, and can compress the spring 5 installed between the universal coupling 6 and the push rod sleeve 4. The push rod 3 can support the push rod sleeve 4 after being screwed in by the hexagonal nut 1. When in use, it is necessary to pre-adjust the length of the push rod 3 and lock the push rod 3 by the hexagonal nut 1, and there is no need to adjust the push rod 3 later, so that the vertical shaft 15 can extend out of the vertical shaft sleeve 18 under the action of the spring 5, and the vertical shaft 15 can be retracted in the vertical shaft sleeve 18 under the action of an external force.

[0035] The top of the vertical shaft 5 described in the present application is welded with one end of a universal coupling 6, and the other end of the universal coupling 6 is connected to a lower joint 9 by bolts. A through hole for the reversal pin 8 to be inserted is processed on the lower joint 9, and a corresponding clamping block 7 is welded and fixed on the side of the through hole for the reversal pin 8 to be inserted. The number of the clamping block 7 and the through hole for the reversal pin 8 to be inserted described in the present application can be 4. The reversal pin 8 described in the above paragraph can be inserted into the waist groove of the upper joint 12 through the through hole reserved on the lower joint 9, and is firmly clamped and fixed in the clamping block 7 through the cross pin at the tail of the reversal pin 8, thereby effectively preventing the reversal pin 8 from flying out when the drilling rig rotates at high speed. An internal conical thread is processed on the top of the lower joint 9, and the upper joint 12 is screwed together with the internal conical thread of the lower joint 9 through the external conical thread. That is, when the drilling tower 17 is erected, the outer conical thread on the upper joint 12 is pressed against the inner conical thread on the lower joint 9, and when the drilling rig performs a positive rotation motion, the rotating lower joint 9 can be screwed onto the inner conical thread of the upper joint through its own inner conical thread.

[0036] The above paragraphs describe the cooperation between the upper joint 12 and the lower joint 9 when the drilling tower 17 is erected. Specifically, when the drilling tower 17 is erected, only a partial force needs to be applied to the lower joint 9 to retract the vertical shaft 15 connected to it into the vertical shaft sleeve 18. The retraction distance is preferably such that it does not affect the movement path of the upper joint 12 when the drilling tower 17 is erected. When the drilling tower 17 is fully erected, the force applied to the lower joint 9 is removed, and the vertical shaft 15 is extended from the vertical shaft sleeve 18 under the action of the spring 5, thereby driving the lower joint 9 to approach and cling to the upper joint 12. The inner tapered thread on the lower joint 9 and the outer tapered thread on the upper joint 12 are tightened under the positive rotation of the drilling rig to achieve the transmission of the positive rotation force.

[0037] In the present application, the upper joint 12 is connected to the outer conical thread at the end of the hexagonal rod 14 in the drilling tower 17 through the right-handed internal conical thread at the end. In addition, an inverted hexagonal sleeve 13 is sleeved on the hexagonal rod 14. The inner hole of the inverted hexagonal sleeve 13 fits the outer surface of the hexagonal rod 14 and is fixed to the upper joint 12 by bolt connection. The hexagonal rod 14 is a hollow rod, and one end of the reinforcing shaft 11 is welded in the inner hole of the end connected to the upper joint 12. Two threaded holes are left at the other end of the reinforcing shaft 11, and the threaded holes can be flush with the bottom of the square groove reserved in the upper joint 12 after the internal thread in the upper joint 12 and the external thread on the hexagonal rod 14 are tightened. The locking plate 10 is inserted into the square groove reserved at the end of the upper joint 12. The shape of the locking plate 10 corresponds to the square groove, and the locking plate 10 can be fastened to the threaded hole reserved on the reinforcing shaft 11 by bolts.

[0038] It can be seen from the above paragraph that when the drilling machine performs forward rotation, its power can be transmitted through the lower joint 9→upper joint 12→hexagonal rod 14. When the drilling machine performs reverse rotation, due to the failure of the threaded connection between the above three, its power transmission is transmitted through the following two paths: one is through the lower joint 9→reversal pin 8→upper joint 12→reversal hexagonal sleeve 13→hexagonal rod 14, and the other is the lower joint 9→reversal pin 8→upper joint 12→locking plate 10→reinforcement shaft 11→hexagonal rod 14.

[0039] That is, when the forward rotation stops and the drilling machine performs reverse rotation, the reverse pin 8 needs to be inserted into the waist groove of the upper joint 12 through the reserved through hole of the lower joint 9, and the reverse pin 8 is fixed in the clamping block 7 through the cross pin at the tail of the reverse pin 8 to prevent the reverse pin 8 from being thrown out when the drilling machine rotates at high speed. After the reverse pin 8 is pulled out from the reserved through hole of the lower joint 9, when the drilling machine performs reverse rotation again, the right-handed cone thread connection between the upper joint 12 and the lower joint 9 fails, and the rotating lower joint 9 can be detached from the upper joint 12, thereby realizing the separation between the two.

[0040] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A quick connection and separation mechanism for forward and reverse power transmission between a vertical shaft and a hexagonal rod of a drilling rig, comprising a vertical shaft sleeve (18), a top rod seat (2) being installed at the bottom of the vertical shaft sleeve (18), characterized in that: A vertical shaft (15) is installed inside the vertical shaft sleeve (18) so as to slide relative to the vertical shaft sleeve. One end of a universal coupling (6) is fixed to the top of the vertical shaft (15). The other end of the universal coupling (6) is connected to a lower joint (9). The lower joint (9) is connected to the outer conical thread of the upper joint (12) via an inner conical thread. A through hole for a reversing pin (8) to pass through is processed on the lower joint (9). A clamping block (7) is fixedly connected to the corresponding through hole. After passing through the through hole, the reversing pin (8) is plugged into the waist groove on the upper joint (12). The tail of the reversing pin (8) is fixed to the clamping block (7). The upper joint (12) is connected to the outer conical thread of the hexagonal rod (14) via an inner conical thread. An inverted hexagonal sleeve (13) is sleeved on the outside of the hexagonal rod (14). The hexagonal hole of the inverted hexagonal sleeve (13) fits the outer surface of the hexagonal rod (14). The inverted hexagonal sleeve (13) is fixed to the upper joint (12). The end of the hexagonal rod (14) is fixedly connected to a reinforcing shaft (11), and the reinforcing shaft (11) is located in an upper joint (12) threadedly connected to the end of the hexagonal rod (14); a threaded hole is left at the end of the reinforcing shaft (11), and the reinforcing shaft (11) is connected to the locking plate (10) by bolts through the threaded hole; The locking piece (10) is located in a square groove reserved at the end of the upper joint (12); The tail of the reversing pin (8) is fixed to the clamping block (7) via a transverse pin; A push rod sleeve (4) is installed inside the vertical shaft (15) and slides relative to the vertical shaft (15). A spring (5) is provided between the push rod sleeve (4) and the universal coupling (6). The push rod (3) passes through the push rod seat (2) and is connected to the push rod sleeve (4).

2. The quick connection and separation mechanism for forward and reverse power transmission between the vertical shaft of the drilling rig and the hexagonal rod according to claim 1 is characterized by: The bottom of the push rod (3) is fixed on the push rod seat (2) through a hexagonal nut (1).

3. The quick connection and separation mechanism for forward and reverse power transmission between the vertical shaft of the drilling rig and the hexagonal rod according to claim 2 is characterized by: The upper joint (12) is connected to the outer conical thread at the end of the hexagonal rod (14) via a right-handed inner conical thread.

4. The quick connection and separation mechanism for forward and reverse power transmission between the vertical shaft of a drilling rig and a hexagonal rod according to any one of claims 1 to 3, characterized in that: The hexagonal rod (14) is located in a drilling tower (17), and a power head (16) for transmission with the hexagonal rod (14) is also provided on the drilling tower (17).

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