Tool for lifting workpieces with annular grooves in the inner hole

Abstract

The present invention relates to a tool for lifting a workpiece with an annular groove in an inner hole, which is used for locking, lifting, and releasing the workpiece located in a deep hole. The tool comprises: a lifting rod; a separation sleeve, the top of which is threadedly connected to the lower end of the lifting rod, a plurality of bevel grooves being provided on the outer wall of the separation sleeve, the plurality of bevel grooves being circumferentially and evenly arranged around the separation sleeve, and each bevel groove extending along the length direction of the separation sleeve; a main body sleeve being sleeved outside the separation sleeve, a limiting step being provided on the top of the main body sleeve, the bottom of the limiting step abutting against the top of the separation sleeve; an ejection mechanism, wherein the plurality of ejection mechanisms are provided in the wall of the main body sleeve and circumferentially arranged around the main body sleeve; when the ejection mechanism is not ejected, the plurality of ejection mechanisms are arranged in one-to-one correspondence with the bevel grooves; when the lifting rod and the separation sleeve rotate, the ejection mechanism is gradually ejected by the bevel groove and disengaged from the bevel groove, and the ejection mechanism disengaged from the bevel groove is locked with the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of offshore oil production equipment, in particular to a tool for hoisting a workpiece with an annular groove in its inner hole. Background Art

[0002] In the field of offshore oil production equipment technology, some workpieces with annular grooves in the inner hole need to be lifted and placed in a deep hole position, and then the lifting equipment and the workpiece need to be released, or the workpiece needs to be taken out of the deep hole. When the workpiece is in the deep hole, it is impossible for humans to enter the deep hole to install the lifting device, which brings great difficulties to the locking, lifting and unlocking of the workpiece.

[0003] Therefore, it is necessary to design a tool for lifting workpieces with annular grooves in the inner hole. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to provide a tool for lifting workpieces with annular grooves in the inner hole, which can complete the locking and unlocking of the workpiece outside the deep hole, so as to solve the problem that when the workpiece enters the deep hole, it is impossible for humans to enter the deep hole to set up a lifting device.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The tool for lifting a workpiece with an annular groove in the inner hole of the present invention is used for locking, lifting, and releasing the workpiece located in a deep hole, and includes: a lifting rod; a separation sleeve, the top of which is threadedly connected to the lower end of the lifting rod, and a plurality of bevel grooves are provided on the outer wall of the separation sleeve, and the plurality of bevel grooves are circumferentially and evenly arranged around the separation sleeve, and each of the bevel grooves extends along the length direction of the separation sleeve; a main body sleeve, which is sleeved outside the separation sleeve, and a limit position is provided on the top of the main body sleeve Step, the bottom of the limiting step abuts against the top of the separation sleeve; ejection mechanism, a plurality of the ejection mechanisms are arranged in the wall of the main sleeve and circumferentially around the main sleeve; when the ejection mechanism is not ejected, the plurality of the ejection mechanisms are arranged in one-to-one correspondence with the bevel groove; when the lifting rod rotates together with the separation sleeve, the ejection mechanism is gradually ejected by the bevel groove and disengaged from the bevel groove, and the ejection mechanism disengaged from the bevel groove is locked with the workpiece.

[0007] The tool preferably also includes a guide sleeve and a connecting plate, wherein the connecting plate is sleeved outside the whole formed by the lifting rod, the separation sleeve and the main sleeve; the guide sleeve is sleeved outside the connecting plate; a connecting rib is provided in the middle of the guide sleeve, the connecting rib is fixed to the connecting plate by a first connecting piece, and the connecting plate is fixed to the top of the main sleeve by a second connecting piece.

[0008] The tool is preferably provided with an annular groove and a plurality of anti-rotation pin grooves on the inner wall of the workpiece; the plurality of anti-rotation pin grooves are circumferentially arranged around the central axis of the workpiece and are respectively located below the annular groove; the anti-rotation pin groove is a vertical groove, the top of which is connected to the annular groove.

[0009] The tool, preferably, the ejection mechanism includes a locking pin, a first spring and a pressure block; the wall of the main sleeve is provided with a step hole, and the step hole has two step surfaces; the locking pin has a disc-shaped protrusion, and the locking pin with the disc-shaped protrusion is inserted into the step hole, and the rear side of its disc-shaped protrusion abuts against the first step surface; the first spring is sleeved on the locking pin, and the first end of the first spring abuts against the front side of the disc-shaped protrusion; the pressure block is arranged in the step hole and fixedly connected to the step hole, and the rear side of the pressure block abuts against the second step surface, and the pressure block is used to block and limit the second end of the first spring; when the lifting rod rotates together with the separation sleeve, one end of the locking pin disengages from the bevel groove, and the other end thereof extends into the annular groove to achieve locking.

[0010] In the tool, preferably, the end of the locking pin that cooperates with the bevel groove is provided with a chamfer.

[0011] Preferably, the tool also includes a transverse limit screw and a longitudinal limit screw; the transverse limit screw is arranged on the lifting rod and is perpendicular to the lifting rod; the longitudinal limit screw is arranged on the connecting plate and is perpendicular to the top surface of the connecting plate; when the lifting rod drives the separation sleeve to rotate, the transverse limit screw and the longitudinal limit screw interfere with each other to limit the separation sleeve circumferentially.

[0012] Preferably, the tool also includes a device for preventing the lifting rod from rotating; the device for preventing the lifting rod from rotating includes an anti-rotation key, which is arranged parallel to the top of the separation sleeve; an anti-rotation groove is provided on the lifting rod; the anti-rotation key is fixed to the top of the separation sleeve through a third connecting piece, and one end of the anti-rotation key extends into the anti-rotation groove of the lifting rod.

[0013] The tool preferably comprises two devices for preventing the lifting rod from rotating, and the two devices for preventing the lifting rod from rotating are respectively located on both sides of the lifting rod.

[0014] Preferably, the tool also includes several devices for preventing the main sleeve from rotating; each of the devices for preventing the main sleeve from rotating includes an anti-rotation pin, a second spring, a cover plate and a fourth connecting piece; a step groove is provided on the outer wall of the main sleeve; the anti-rotation pin is provided in the first area of ​​the step groove, and the second spring is provided between the anti-rotation pin and the bottom of the first area of ​​the step groove; a part of the cover plate is located in the second area of ​​the step groove, and the other part extends into the first area of ​​the step groove, and the cover plate is used to limit the anti-rotation pin; the cover plate is fixed to the second area of ​​the step groove by the fourth connecting piece; when the second spring is extended, the anti-rotation pin extends into the anti-rotation pin groove to prevent the main sleeve from rotating circumferentially; when the second spring is compressed, the anti-rotation pin disengages from the anti-rotation pin groove.

[0015] The tool is preferably provided with an inverted bevel on the top of the annular groove, and after the anti-rotation pin is disengaged from the anti-rotation pin groove, the inverted bevel serves to guide the anti-rotation pin to disengage from the annular groove.

[0016] The present invention has the following advantages due to the adoption of the above technical solution:

[0017] The present invention can complete the locking and unlocking of the workpiece outside the deep hole;

[0018] The present invention can solve the problem that when a workpiece enters a deep hole, manual labor cannot enter the deep hole to set a lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0020] Figure 1 It is a schematic cross-sectional view of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the separation sleeve of the present invention;

[0023] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure of part B;

[0024] Figure 5 yes Figure 1 Schematic diagram of the cross-sectional structure in CC direction;

[0025] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part D;

[0026] Figure 7 It is a schematic cross-sectional structural diagram of a workpiece of the present invention.

[0027] The symbols in the accompanying drawings represent the following:

[0028] 1-lifting rod; 101-anti-rotation groove; 2-separation sleeve; 201-slope groove; 3-main sleeve; 301-step hole; 302-step groove; 4-ejection mechanism; 401-locking pin; 402-first spring; 403-pressure block; 5-workpiece; 501-annular groove; 502-anti-rotation pin groove; 6-guide sleeve; 7-connecting plate; 8-first connecting piece; 9-second connecting piece; 10-lateral limiting screw; 11-longitudinal limiting screw; 12-device to prevent lifting rod rotation; 1201-anti-rotation key; 1202-third connecting piece; 13-device to prevent main sleeve rotation; 1301-anti-rotation pin; 1302-second spring; 1303-cover plate; 1304-fourth connecting piece. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0030] The present invention provides a tool for lifting a workpiece with an annular groove in the inner hole, which can complete the locking and unlocking of the workpiece outside the deep hole; therefore, it can solve the problem that when the workpiece enters the deep hole, it is impossible for humans to enter the deep hole to set up a lifting device.

[0031] like Figure 1 As shown, the tool for lifting a workpiece with an annular groove in the inner hole provided by the present invention is used for locking, lifting, and releasing a workpiece 5 located in a deep hole, comprising: a lifting rod 1; a separation sleeve 2, the top of which is threadedly connected to the lower end of the lifting rod 1, and a plurality of bevel grooves 201 (see FIG. Figure 3), several bevel grooves 201 are circumferentially and evenly arranged around the separation sleeve 2, and each bevel groove 201 extends along the length direction of the separation sleeve 2; the main sleeve 3 is sleeved outside the separation sleeve 2, and a limiting step is provided on the top of the main sleeve 3, and the bottom of the limiting step abuts against the top of the separation sleeve; the ejection mechanism 4, several ejection mechanisms 4 are arranged in the wall of the main sleeve 3 and circumferentially around the main sleeve 3; when the ejection mechanism 4 is not ejected, several ejection mechanisms 4 are arranged in a one-to-one correspondence with the bevel groove 201; when the lifting rod 1 rotates together with the separation sleeve 2, the ejection mechanism 4 is gradually ejected by the bevel groove 201 and disengaged from the bevel groove 201, and the ejection mechanism 4 disengaged from the bevel groove 201 is locked with the workpiece 5.

[0032] In the above embodiment, preferably, the present invention also includes a guide sleeve 6 and a connecting plate 7, and the connecting plate 7 is sleeved outside the whole formed by the lifting rod 1, the separation sleeve 2 and the main sleeve 3; the guide sleeve 6 is sleeved outside the connecting plate 7; a connecting rib plate is provided in the middle of the guide sleeve 6, and the connecting rib plate is fixed to the connecting plate 7 through a first connecting member 8, and the connecting plate 7 is fixed to the top of the main sleeve 3 through a second connecting member 9.

[0033] In the above embodiment, preferably, Figure 7 As shown, the inner wall of the workpiece 5 is provided with an annular groove 501 and several anti-rotation pin grooves 502; the several anti-rotation pin grooves 502 are circumferentially arranged around the central axis of the workpiece 5, and are respectively located below the annular groove 502; the anti-rotation pin groove 502 is a vertical groove, and its top is connected with the annular groove 501.

[0034] In the above embodiment, preferably, Figure 2 As shown, the ejection mechanism 4 includes a locking pin 401, a first spring 402 and a pressure block 403; the wall of the main sleeve 3 is provided with a step hole 301, and the step hole 301 has two step surfaces; the locking pin 401 has a disc-shaped protrusion, and the locking pin 401 with the disc-shaped protrusion is inserted into the step hole 301, and the rear side of the disc-shaped protrusion abuts against the first step surface; the first spring 402 is sleeved on the locking pin 401, and the first end of the first spring 402 abuts against the disc-shaped protrusion. the front side of the pressing block 403 abuts against the step hole 301; the pressing block 403 is arranged in the step hole 301 and is fixedly connected to the step hole 301, specifically, a threaded connection can be adopted, the rear side of the pressing block 403 abuts against the second step surface, and the pressing block 403 is used to block and limit the second end of the first spring 402; when the lifting rod 1 rotates together with the separation sleeve 2, one end of the locking pin 401 disengages from the bevel groove 201, and the other end thereof extends into the annular groove 501, so as to realize the locking of the ejection mechanism 4 and the workpiece 5.

[0035] In the above embodiment, preferably, the end of the locking pin 401 that cooperates with the bevel groove 201 is provided with a chamfer, and the chamfer is generally 45°, and the slope angle of the bevel groove 201 is also 45°.

[0036] In the above embodiment, preferably, the present invention also includes a transverse limit screw 10 and a longitudinal limit screw 11; the transverse limit screw 10 is arranged on the lifting rod 1 and is perpendicular to the lifting rod 1; the longitudinal limit screw 11 is arranged on the connecting plate 7 and is perpendicular to the top surface of the connecting plate 7; when the lifting rod 1 drives the separation sleeve 2 to rotate, the transverse limit screw 10 and the longitudinal limit screw 11 interfere with each other to perform circumferential limitation on the separation sleeve 2.

[0037] In the above embodiment, preferably, Figure 1 and Figure 4 As shown, the present invention also includes a device 12 for preventing the lifting rod from rotating. The device 12 includes an anti-rotation key 1201, which is arranged parallel to and above the release sleeve 2. The lifting rod 1 is provided with an anti-rotation groove 101. The anti-rotation key 1201 is fixed to the top of the release sleeve 2 via a third connecting member 1202, and one end of the anti-rotation key 1201 extends into the anti-rotation groove 101 of the lifting rod 1. This prevents the lifting rod 1 from rotating independently, thereby causing it to separate from the release sleeve 2.

[0038] In the above embodiment, preferably, there are two lifting rod rotation preventing devices 12 , and the two lifting rod rotation preventing devices 12 are respectively located on both sides of the lifting rod 1 .

[0039] In the above embodiment, preferably, Figure 5 and Figure 6 As shown, the present invention further includes a plurality (three in this embodiment) of devices 13 for preventing the main sleeve from rotating; each device 13 for preventing the main sleeve from rotating includes an anti-rotation pin 1301, a second spring 1302, a cover plate 1303, and a fourth connecting member 1304; a stepped groove 302 is provided on the outer wall of the main sleeve 3; the anti-rotation pin 1301 is provided in the first area of ​​the stepped groove 302, and the second spring 1302 is provided between the anti-rotation pin 1301 and the bottom of the first area of ​​the stepped groove 302; the cover plate 1303 A part of the anti-rotation pin 1301 is located in the second area of ​​the step groove 302, and the other part extends into the first area of ​​the step groove 302, and the cover plate 1303 is used to limit the anti-rotation pin 1301; the cover plate 1303 is fixed to the second area of ​​the step groove 302 through the fourth connecting member 1304, and when the second spring 1302 is extended, the anti-rotation pin 1301 extends into the anti-rotation pin groove 502 to prevent the main sleeve 3 from rotating circumferentially; when the second spring 1302 is compressed, the anti-rotation pin 1301 is disengaged from the anti-rotation pin groove 502.

[0040] In the above embodiment, preferably, an inverted slope is provided on the top of the annular groove 501. When the tool described in the present invention is lifted and the anti-rotation pin 1301 is disengaged from the anti-rotation pin groove 502, the anti-rotation pin 1301 enters the annular groove 501. When the tool is lifted further, the anti-rotation pin 1301 is disengaged from the annular groove 501, and the inverted slope guides the anti-rotation pin 1301 to disengage from the annular groove 501.

[0041] It should be noted that the lower part of the main sleeve 3 of the tool of the present invention is provided with a sleeve step, and the workpiece is provided with a workpiece step. After the tool is lowered, the sleeve step contacts the workpiece step, limiting the position of the tool so that the ejection mechanism just corresponds to the position of the annular groove, and the main sleeve rotation prevention device just corresponds to the position of the anti-rotation pin groove;

[0042] In addition, the first connecting member, the second connecting member, the third connecting member and the fourth connecting member in the present invention are screws respectively;

[0043] Of course, the first spring and the second spring in the present invention may also be replaced by other elastic components.

[0044] The principle of the tool for lifting a workpiece with an annular groove in the inner hole provided by the embodiment of the present invention is:

[0045] The tool of the present invention is placed in a workpiece 5 having an annular groove in its inner hole. The tool is engaged in the anti-rotation pin 1301 by the second spring 1302 into the anti-rotation pin groove 502 of the workpiece 5, completing the locking and positioning of the main sleeve 3 in the tool and the workpiece 5 in the rotational direction. The separation sleeve 2 is then rotated by rotating the lifting rod 1. During the rotation, the locking pin 401 contained in the bevel groove 201 of the separation sleeve 2 is pushed out. The pushed-out locking pin 401 protrudes from the outer diameter of the main sleeve 3 and engages in the annular groove 501 of the workpiece 5, completing the locking of the tool and the workpiece 5. If it is necessary to unlock the tool and the workpiece 5, the lifting rod 1 is rotated, driving the separation sleeve 2 to rotate together until the bevel groove 201 is aligned with the locking pin 401. Under the action of the first spring 402, the locking pin 401 enters the bevel groove 201 and recesses into the outer diameter of the main sleeve 3, thereby unlocking the tool and the workpiece 5.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tool for lifting workpieces with annular grooves in the inner hole, used for locking, lifting, and releasing workpieces in deep holes, characterized in that: include: Lifting rod; A separation sleeve, the top of which is threadedly connected to the lower end of the lifting rod, and the outer wall of the separation sleeve is provided with a plurality of slope grooves, the plurality of slope grooves being evenly arranged around the circumference of the separation sleeve, and each of the slope grooves extending along the length direction of the separation sleeve; A main sleeve is sleeved outside the separation sleeve, and a limiting step is provided on the top of the main sleeve, and the bottom of the limiting step abuts against the top of the separation sleeve; Ejection mechanisms, wherein a plurality of ejection mechanisms are arranged in the wall of the main sleeve and are arranged circumferentially around the main sleeve; When the ejection mechanism is not ejected, a plurality of the ejection mechanisms are arranged in one-to-one correspondence with the ramp grooves; When the lifting rod rotates together with the separation sleeve, the ejection mechanism is gradually ejected by the ramp groove and separated from the ramp groove, and the ejection mechanism separated from the ramp groove is locked with the workpiece; The ejection mechanism includes a lock pin, a first spring and a pressure block; The wall of the main sleeve is provided with a stepped hole, and the stepped hole has two stepped surfaces; The locking pin has a disc-shaped protrusion, and the locking pin with the disc-shaped protrusion is inserted into the step hole, and the rear side of the disc-shaped protrusion abuts against the first step surface; The first spring is sleeved on the lock pin, and the first end of the first spring abuts against the front side of the disc-shaped protrusion; The pressing block is arranged in the step hole and fixedly connected to the step hole, and the rear side of the pressing block abuts against the second step surface. The pressing block is used to block and limit the second end of the first spring; When the lifting rod rotates together with the separation sleeve, one end of the locking pin is separated from the ramp groove, and the other end thereof is used to extend into the annular groove to achieve locking.

2. The tool according to claim 1, characterized in that Also includes a guide sleeve and a connecting plate, The connecting plate is sleeved outside the integral body formed by the lifting rod, the separation sleeve and the main body sleeve; The guide sleeve is sleeved outside the connecting plate; A connecting rib is provided in the middle of the guide sleeve. The connecting rib is fixed to the connecting plate through a first connecting piece, and the connecting plate is fixed to the top of the main sleeve through a second connecting piece.

3. The tool according to claim 2, characterized in that The inner wall of the workpiece is provided with an annular groove and a plurality of anti-rotation pin grooves; A plurality of anti-rotation pin grooves are circumferentially arranged around the central axis of the workpiece and are respectively located below the annular groove; The anti-rotation pin groove is a vertical groove, and the top of the vertical groove is connected with the annular groove.

4. The tool according to claim 1, characterized in that The end of the locking pin that cooperates with the ramp groove is provided with a chamfer.

5. The tool according to claim 2, characterized in that Also included are a transverse limit screw and a longitudinal limit screw; The transverse limit screw is arranged on the lifting rod and is arranged perpendicular to the lifting rod; The longitudinal limit screw is arranged on the connecting plate and is perpendicular to the top surface of the connecting plate; When the lifting rod drives the separation sleeve to rotate, the transverse limiting screw and the longitudinal limiting screw interfere with each other to limit the circumferential position of the separation sleeve.

6. The tool according to claim 1, characterized in that Also includes a device to prevent the lifting rod from rotating; The device for preventing the lifting rod from rotating includes an anti-rotation key, which is arranged parallel to the top of the separation sleeve; The lifting rod is provided with an anti-rotation groove; The anti-rotation key is fixed to the top of the separation sleeve through a third connecting piece, and one end of the anti-rotation key extends into the anti-rotation groove of the lifting rod.

7. The tool according to claim 6, characterized in that There are two devices for preventing the lifting rod from rotating, and the two devices for preventing the lifting rod from rotating are respectively located on both sides of the lifting rod.

8. The tool according to claim 3, characterized in that Also included are several devices for preventing the main body sleeve from rotating; Each of the main sleeve rotation prevention devices includes an anti-rotation pin, a second spring, a cover plate and a fourth connecting member; A step groove is provided on the outer wall of the main sleeve; The anti-rotation pin is arranged in the first area of ​​the step groove, and the second spring is arranged between the anti-rotation pin and the groove bottom of the first area of ​​the step groove; A portion of the cover plate is located in the second area of ​​the step groove, and another portion extends into the first area of ​​the step groove, and the cover plate is used to limit the anti-rotation pin; The cover plate is fixed to the second area of ​​the step groove via a fourth connecting member; When the second spring is extended, the anti-rotation pin extends into the anti-rotation pin groove to prevent the main body sleeve from rotating circumferentially; When the second spring is compressed, the anti-rotation pin is disengaged from the anti-rotation pin groove.

9. The tool according to claim 8, characterized in that The top of the annular groove is provided with an inverted slope, and after the anti-rotation pin is separated from the anti-rotation pin groove, the inverted slope plays a guiding role in the anti-rotation pin being separated from the annular groove.

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