CN111331542B

CN111331542B - Screw tightening device

Info

Publication number: CN111331542B
Application number: CN202010005698.1A
Authority: CN
Inventors: 王玉根; 李庚�; 汪琛又; 汪敏; 王灏; 杨永春; 江涛; 程地碧; 郑永; 郑辉; 王勇; 汪春浦; 粟超; 钟思存; 代小川; 张惟玮; 黄继鹏; 刘桦霖; 张琰; 唐翔宇
Original assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Chuanqing Drilling Engineering Co Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2022-09-16
Anticipated expiration: 2040-01-03
Also published as: CN111331542A

Abstract

The invention discloses a screw tightening device, which belongs to the technical field of Christmas tree flange dismounting tools, comprises a body and is characterized in that: still including setting up activity pincers and the twist grip on the body, the body includes the centre gripping section and grips the section, the tip of centre gripping section is "V" font, the section of gripping is the cuboid, it has cuboid recess and "T" shape recess to open in the section of gripping, the turbine has been inlayed to the lower part of T "shape recess, twist grip runs through the turbine, the activity pincers include clamping part and sliding part, the clamping part is" V "font, the sliding part is the cuboid form, the activity pincers pass through sliding part and cuboid recess sliding connection, the sliding part is connected with the rack, the rack passes through the screw thread interlock with the turbine, it has the anticreep round pin to rivet in the section of gripping, the twist grip is connected with the section of gripping through the anticreep round pin. The outer hexagonal nut clamp can clamp test-well flange outer hexagonal nuts with different sizes, can adapt to various different working environments, and is high in disassembly and assembly flexibility, convenient and safe to disassemble and assemble.

Description

Screw tightening device

Technical Field

The invention relates to the technical field of Christmas tree flange dismounting tools, in particular to a screw tightening device.

Background

When dismouting well head flange, at present the universal adoption strikes the spanner and strikes the hammer, needs two people to cooperate when striking the flange screw, wastes time and energy, strikes the back at the screw, and the lower extreme is pieced together and is strikeed the spanner and be difficult to take out, and because of production tree bypass outward appearance top surface is narrow, dismantles the operation and needs two people to cooperate the completion again, and the focus unstability can appear during the staff operation, influences operation and job schedule, and has the tup and skids and hinder the people, the risk that the eminence falls. Therefore, the well testing flange dismounting tool which is convenient to carry and operate and can finish high-altitude dismounting by a single person independently so as to adapt to various different working environments is urgently needed.

Chinese patent documents with publication number CN 208841308U and publication date of 2019, 05 and 10 disclose a wellhead flange bolt dismounting device, which is characterized by comprising a vertical pipe and a fixed support, wherein the lower end of the vertical pipe is fixed with an upper socket wrench; the fixed support is provided with a rotating head, a hoop head and a vertical pipe centering mechanism, the middle upper part and the upper part of an inner bushing of the hoop head thread centering mechanism are clamped by a hydraulic power tong, and the hoop head is connected with a wellhead through a hoop and is fixed outside a shaft sleeve of the vertical pipe centering mechanism through a connecting plate; and (3) penetrating the stand pipe into a hoop head of the stand pipe gate valve for connection.

This well head flange bolt dismouting device that patent document discloses, when can reducing many people operation in the narrow and small space of well head, the hammer strikes the spanner and shakes the safety problem that the departure or the hammer is out of alignment maloperation and leads to, but, can not the outer hexagon nut of not unidimensional test well flange of centre gripping, can't adapt to the operational environment of various differences, the dismouting flexibility is poor.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a screw tightening device which can clamp test flange outer hexagonal nuts with different sizes, can adapt to various different working environments, and is high in disassembly and assembly flexibility, convenient and safe.

The invention is realized by the following technical scheme:

the utility model provides a screw makeup device, includes the body, its characterized in that: still including setting up activity pincers and the twist grip on the body, the body includes the centre gripping section and grips the section, the tip of centre gripping section is "V" font, grips the section and is the cuboid, it has cuboid recess and "T" shape recess to open in the section to grip, and the turbine has been inlayed to the lower part of "T" shape recess, the twist grip runs through the turbine, the activity pincers include clamping part and sliding part, and the clamping part is "V" font, and the sliding part is the cuboid form, the activity pincers pass through sliding part and cuboid recess sliding connection, the end connection of sliding part has the rack, the rack is located the upper portion of T "shape recess, and the rack passes through the screw thread interlock with the turbine.

The last rotation of grip segment is connected with and keeps off the handle, keeps off and is fixed with the bayonet lock on the handle, rotates on the grip segment and is connected with the locking piece, and it has the circular arc groove to open on the locking piece, keeps off the one end of handle and passes through the bayonet lock and rotate the circular arc inslot of connecting at the locking piece.

The stop handle is provided with a through groove, the movable pliers penetrate through the through groove, a limiting screw is fixed on the holding section, and the limiting screw is located above the rack.

And a limiting screw rod for limiting the stop handle is fixed at the lower part of the holding section.

The section of gripping is last to be opened there is the inclined hole, is provided with the internal thread in the inclined hole, and open at the middle part of lock block has the screw rod hole, and the downthehole set screw that is provided with of screw rod has return spring, and set screw passes through threaded connection in the inclined hole on the set screw.

The holding section is riveted with an anti-falling pin, and the rotating handle is connected with the holding section through the anti-falling pin.

The working principle of the invention is as follows:

based on the principle that the rotary motion is changed into the linear motion, namely the clockwise and anticlockwise rotary motion of the turbine is converted into the linear moving motion of the rack.

Before well testing, an opening of the body is placed leftwards, one surface with a cuboid groove faces upwards, the movable clamp is placed into the cuboid groove of the body, a boss with a rack at the lower end of the movable clamp is embedded into a kidney-shaped groove of the cuboid groove, and a limit screw of the movable clamp is screwed with a limit threaded hole of the movable clamp on the body; the turbine is placed into the T-shaped groove by one hand, the rotating handle is penetrated into the longitudinal through hole at the lower end of the body by the other hand, the rotating handle is made to penetrate through the semicircular through hole of the turbine until the front end of the rotating shaft of the rotating handle is inserted into the side hole of the T-shaped groove of the body, and then the anti-falling pin is riveted into the anti-falling pin through hole at the lower end of the body; locking piece return spring set screw twists this body outside inclined hole in, with the locking piece suit on body semicircle boss, make on body and the locking piece respective pivot hole axial align, penetrate locking piece pivot and rivet tightly. Screwing a locking block return spring fixing screw into a corresponding threaded hole of the locking block, rotating the locking block to sleeve one end of the locking block return spring on a locking block return spring fixing screw rod, and sleeving the other end of the locking block return spring on the locking block return spring fixing screw rod; the stop is screwed into the straight-edge threaded hole in the side face of the body by the limit screw, the stop handle is sleeved, the body and the stop on the stop handle are axially aligned with the rotating shaft hole, the stop passes through the body and the stop on the stop handle to rivet the rotating shaft hole, the stop handle is rotated to enable the bayonet lock mounting hole to be located in the hook-shaped arc groove of the locking block, and the bayonet lock passes through the locking block and the bayonet lock mounting hole on the stop handle to be riveted, so that the assembling of the well testing flange screw tightening device is completed.

When the screw cap is screwed down, the blocking handle is separated outwards to be in a locking state and be in a working state; turning a rotating handle anticlockwise to enable a reversed V-shaped opening of the well testing flange screw tightening device to be leftward, retracting a movable clamp, increasing an opening, clamping an end reversed V-shaped surface of a clamping section on a diagonal of a nut at the lower end of a flange when the distance of the opening is larger than the diagonal distance of the flange nut, then turning the rotating handle clockwise, extending the movable clamp, reducing the opening until the flange nut is clamped, sleeving a sleeve knocking wrench with the flat size of the flange nut into the nut at the upper end of the flange, hammering the knocking wrench clockwise, rotating the well testing flange screw tightening device together with a screw until a stop handle is contacted with an adjacent nut, limiting the stop handle to rotate by the nut, pressing a locking block to unlock the stop handle after the nut is tightened by force applied to the sleeve knocking wrench, turning the rotating handle anticlockwise, retracting the movable clamp, increasing the opening, and taking out the well testing flange screw tightening device, the remaining seven flange bolts were fastened diagonally in the same way.

When the screw cap is loosened, the blocking handle is separated outwards to be in a locking state; turning the reverse V-shaped opening of the well testing flange screw tightening device to the right, rotating the rotating handle anticlockwise, retracting the movable clamp, increasing the opening, when the distance is larger than the diagonal distance of the flange screw cap, clamping the end part of the clamping section on the diagonal of the screw cap at the lower end of the flange, then rotating the rotating handle clockwise, extending the movable clamp, reducing the opening until clamping the flange screw cap, sleeving a sleeve knocking wrench with the same flat size as the flange screw cap into the screw cap at the upper end of the flange, hammering the knocking wrench anticlockwise, rotating the well testing flange screw tightening device together with the screw until the stop handle is contacted with the adjacent screw cap, limiting the stop handle to rotate by the screw cap, when the force applied on the sleeve knocking wrench is larger than the tightening force of the screw cap at the upper end of the flange, loosening the screw cap, rotating the rotating handle anticlockwise, retracting the movable clamp, increasing the opening, taking out the well testing flange screw tightening device, the other seven flange bolts are loosened by the same method, and the whole flange mounting and dismounting process is safe and reliable.

The beneficial effects of the invention are mainly shown in the following aspects:

the body comprises a clamping section and a holding section, the end part of the clamping section is in an inverted V shape, the holding section is in a cuboid shape, a cuboid groove and a T-shaped groove are formed in the holding section, a turbine is embedded in the lower part of the T-shaped groove, a rotary handle penetrates through the turbine, the movable pliers comprise a clamping part and a sliding part, the clamping part is in a V shape, the sliding part is in a cuboid shape, the movable pliers are connected with the cuboid groove in a sliding mode through the sliding part, the end part of the sliding part is connected with a rack, the rack is located on the upper part of the T-shaped groove, the rack is meshed with the turbine through threads, and based on the principle that the rotary motion is changed into the linear motion of the rack by converting clockwise and counterclockwise rotary motions of the turbine into the linear motion of the rack, the rotary handle is rotated counterclockwise, the movable pliers retract, and the opening is increased; the rotating handle is rotated clockwise, the movable pliers extend out, and the opening is reduced; compared with the prior art, the outer hexagonal nut of the well testing flange with different sizes can be clamped, the outer hexagonal nut can adapt to various different working environments, the disassembly and assembly flexibility is strong, and the disassembly and assembly are convenient and safe.

The clamping section is rotatably connected with a blocking handle, the blocking handle is fixedly provided with a clamping pin, the holding section is rotatably connected with a locking block, the locking block is provided with an arc groove, one end of the blocking handle is rotatably connected into the arc groove of the locking block through the clamping pin, the locking block is arranged to facilitate locking, and the working stability of the whole well testing flange screw tightening device is improved.

And the stop handle is provided with a through groove, the movable pliers penetrate through the through groove, the holding section is fixedly provided with a limiting screw, and the limiting screw is positioned above the rack and can play a limiting and guiding role in the telescopic movement of the movable pliers.

In the invention, the lower part of the holding section is fixed with the limiting screw rod for limiting the stop handle, so that the return stroke of the stop handle after unlocking can be limited, the body is prevented from being embedded into the stop handle through groove, fingers are prevented from being clamped between the body and the stop handle, and the use safety is improved.

Fifthly, an inclined hole is formed in the holding section, internal threads are arranged in the inclined hole, a screw hole is formed in the middle of the locking block, a fixing screw is arranged in the screw hole, a return spring is sleeved on the fixing screw, the fixing screw is connected into the inclined hole through threads, and when the return spring of the locking block is compressed, the clamping pin can conveniently enter the arc groove of the locking block to unlock the blocking handle; anticlockwise rotation twist grip, the opening increase, the tight device of test well flange screw piece is convenient takes out from the nut, when stopping to press the lock piece, lock piece and fender are under the return spring effect of lock piece, and automatic re-setting has improved the convenient degree of whole locking and unblock process.

According to the invention, the holding section is riveted with the anti-drop pin, and the rotating handle is connected with the holding section through the anti-drop pin, so that the rotating handle can be well fixed, and the working reliability of the rotating handle is ensured.

Drawings

The invention will be further described in detail with reference to the drawings and the detailed description, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a grip segment according to the present invention;

the labels in the figure are: 1. the body, 2, activity pincers, 3, twist grip, 4, centre gripping section, 5, the section of gripping, 6, cuboid recess, 7, "T" shape recess, 8, turbine, 9, clamping part, 10, sliding part, 11, rack, 12, fender handle, 13, bayonet lock, 14, locking piece, 15, circular arc groove, 16, logical groove, 17, stop screw, 18, stop screw, 19, inclined hole, 20, clamping screw, 21, return spring, 22, anticreep round pin.

Detailed Description

Example 1

Referring to fig. 1, a screw splicing device, includes body 1, still includes activity pincers 2 and the twist grip 3 of setting on body 1, body 1 includes centre gripping section 4 and grips section 5, the tip of centre gripping section 4 is "V" font, grips section 5 and is the cuboid, it has cuboid recess 6 and "T" shape recess 7 to open on the section 5 to grip, turbine 8 has been inlayed to the lower part of "T" shape recess 7, twist grip 3 runs through turbine 8, activity pincers 2 includes clamping part 9 and sliding part 10, and clamping part 9 is "V" font, and sliding part 10 is the cuboid form, activity pincers 2 pass through sliding part 10 and cuboid recess 6 sliding connection, the end connection of sliding part 10 has rack 11, rack 11 is located the upper portion of T "shape recess, and rack 11 passes through the screw thread interlock with turbine 8.

The embodiment is the most basic implementation mode, the body 1 comprises a clamping section 4 and a holding section 5, the end of the clamping section 4 is in an inverted ' V ' -shape, the holding section 5 is in a cuboid shape, a cuboid groove 6 and a ' T ' -shaped groove 7 are formed in the holding section 5, a turbine 8 is embedded in the lower portion of the ' T ' -shaped groove 7, the rotating handle 3 penetrates through the turbine 8, the movable pliers 2 comprises a clamping portion 9 and a sliding portion 10, the clamping portion 9 is in a ' V ' -shape, the sliding portion 10 is in a cuboid shape, the movable pliers 2 is in sliding connection with the cuboid groove 6 through the sliding portion 10, the end of the sliding portion 10 is connected with a rack 11, the rack 11 is located at the upper portion of the T ' -shaped groove, the rack 11 is meshed with the turbine 8 through threads, the rotating handle 3 is rotated counterclockwise based on the principle that the clockwise and counterclockwise rotating motions of the turbine 8 are converted into the linear motions of the rack 11, the movable pliers 2 retracts, the opening is enlarged; the rotating handle 3 is rotated clockwise, the movable pliers 2 extend out, and the opening is reduced; compared with the prior art, the outer hexagonal nut of the well testing flange with different sizes can be clamped, the outer hexagonal nut can adapt to various different working environments, the disassembly and assembly flexibility is strong, and the disassembly and assembly are convenient and safe.

Example 2

The clamping section 4 is rotatably connected with a blocking handle 12, the blocking handle 12 is fixedly provided with a clamping pin 13, the holding section 5 is rotatably connected with a locking block 14, the locking block 14 is provided with an arc groove 15, and one end of the blocking handle 12 is rotatably connected in the arc groove 15 of the locking block 14 through the clamping pin 13.

The embodiment is a preferred implementation mode, rotates on the grip section 4 to be connected with and keeps off 12, keeps off and is fixed with bayonet lock 13 on 12, rotates on the grip section 5 to be connected with locking piece 14, and it has circular arc groove 15 to open on the locking piece 14, keeps off that the one end of 12 rotates through bayonet lock 13 to be connected in the circular arc groove 15 of locking piece 14, is convenient for lock through setting up locking piece 14, improves the job stabilization nature of whole test well flange screw piecing together device.

Example 3

Referring to fig. 1 and 2, a screw splicing device, includes body 1, still includes activity pincers 2 and the twist grip 3 of setting on body 1, body 1 includes centre gripping section 4 and grips section 5, the tip of centre gripping section 4 is "V" font, grips section 5 and is the cuboid, it has cuboid recess 6 and "T" shape recess 7 to open on the section 5 to grip, turbine 8 has been inlayed to the lower part of "T" shape recess 7, twist grip 3 runs through turbine 8, activity pincers 2 includes clamping part 9 and sliding part 10, and clamping part 9 is "V" font, and sliding part 10 is the cuboid form, activity pincers 2 pass through sliding part 10 and cuboid recess 6 sliding connection, the end connection of sliding part 10 has rack 11, rack 11 is located the upper portion of T "shape recess, and rack 11 passes through the screw thread interlock with turbine 8.

The stop handle 12 is provided with a through groove 16, the movable pliers 2 penetrates through the through groove 16, a limiting screw 17 is fixed on the holding section 5, and the limiting screw 17 is positioned above the rack 11.

In this embodiment, a through slot 16 is formed in the retaining handle 12, the movable pliers 2 penetrates through the through slot 16, and a limit screw 17 is fixed on the holding section 5, and the limit screw 17 is located above the rack 11 and can play a role in limiting and guiding the telescopic movement of the movable pliers 2.

Example 4

The stop handle 12 is provided with a through groove 16, the movable pliers 2 penetrate through the through groove 16, a limiting screw 17 is fixed on the holding section 5, and the limiting screw 17 is positioned above the rack 11.

A limiting screw 18 for limiting the stop handle 12 is fixed at the lower part of the holding section 5.

In another preferred embodiment, a limiting screw 18 for limiting the handle 12 is fixed at the lower part of the holding section 5, so that the return stroke of the handle 12 after being unlocked can be limited, the body 1 is prevented from being embedded into the through groove 16 of the handle 12, fingers are prevented from being clamped between the body 1 and the handle 12, and the use safety is improved.

Example 5

The rotary connecting device is characterized in that a retaining handle 12 is connected to the clamping section 4 in a rotating mode, a clamping pin 13 is fixed on the retaining handle 12, a locking block 14 is connected to the holding section 5 in a rotating mode, an arc groove 15 is formed in the locking block 14, and one end of the retaining handle 12 is connected to the arc groove 15 of the locking block 14 in a rotating mode through the clamping pin 13.

The holding section 5 is provided with an inclined hole 19, an internal thread is arranged in the inclined hole 19, the middle of the locking block 14 is provided with a screw hole, a fixing screw 20 is arranged in the screw hole, a return spring 21 is sleeved on the fixing screw 20, and the fixing screw 20 is connected in the inclined hole 19 through a thread.

In this embodiment, as another preferred embodiment, the grip section 5 is provided with an inclined hole 19, an internal thread is provided in the inclined hole 19, a screw hole is provided in the middle of the locking block 14, a fixing screw 20 is provided in the screw hole, a return spring 21 is sleeved on the fixing screw 20, the fixing screw 20 is connected in the inclined hole 19 through a thread, and when the return spring 21 of the locking block 14 is compressed, the detent 13 can conveniently enter the arc groove 15 of the locking block 14 to unlock the catch 12; anticlockwise rotation twist grip 3, the opening increase, the convenient nut of following of test well flange screw makeup device takes out, when stopping to press locking piece 14, locking piece 14 and fender 12 under the return spring 21 effect of locking piece 14, automatic re-setting have improved the convenient degree of whole locking and unblock process.

Example 6

The holding section 5 is riveted with a separation-preventing pin 22, and the rotating handle 3 is connected with the holding section 5 through the separation-preventing pin 22.

The embodiment is a best implementation mode, the body 1 comprises a clamping section 4 and a holding section 5, the end of the clamping section 4 is in an inverted ' V ' shape, the holding section 5 is in a cuboid shape, a cuboid groove 6 and a ' T ' -shaped groove 7 are formed in the holding section 5, a turbine 8 is embedded in the lower portion of the ' T ' -shaped groove 7, the rotating handle 3 penetrates through the turbine 8, the movable clamp 2 comprises a clamping portion 9 and a sliding portion 10, the clamping portion 9 is in a ' V ' shape, the sliding portion 10 is in a cuboid shape, the movable clamp 2 is in sliding connection with the cuboid groove 6 through the sliding portion 10, the end of the sliding portion 10 is connected with a rack 11, the rack 11 is located at the upper portion of the T ' -shaped groove, the rack 11 is meshed with the turbine 8 through threads, based on the principle that the rotation motion becomes linear motion, namely, the clockwise and counterclockwise rotation motion of the turbine 8 is converted into the linear motion of the rack 11, the rotating handle 3 is rotated counterclockwise, and the movable clamp 2 retracts, the opening is enlarged; the rotating handle 3 is rotated clockwise, the movable pliers 2 extend out, and the opening is reduced; compared with the prior art, the outer hexagonal nut of the well testing flange with different sizes can be clamped, the outer hexagonal nut can adapt to various different working environments, the disassembly and assembly flexibility is strong, and the disassembly and assembly are convenient and safe.

The section of gripping 5 is last to be riveted with anticreep round pin 22, and twist grip 3 is connected with section of gripping 5 through anticreep round pin 22, and fixed twist grip 3 that can be good ensures twist grip 3's operational reliability.

Claims

1. The utility model provides a screw makeup device, includes body (1), its characterized in that: the clamping device is characterized by further comprising movable pliers (2) and a rotating handle (3) which are arranged on the body (1), wherein the body (1) comprises a clamping section (4) and a holding section (5), the end portion of the clamping section (4) is inverted V-shaped, the holding section (5) is cuboid, the holding section (5) is provided with a cuboid groove (6) and a T-shaped groove (7), a turbine (8) is embedded in the lower portion of the T-shaped groove (7), the rotating handle (3) penetrates through the turbine (8), the movable pliers (2) comprises a clamping portion (9) and a sliding portion (10), the clamping portion (9) is V-shaped, the sliding portion (10) is cuboid, the movable pliers (2) is in sliding connection with the cuboid groove (6) through the sliding portion (10), the end portion of the sliding portion (10) is connected with a rack (11), and the rack (11) is located on the upper portion of the T-shaped groove, the gear rack (11) is meshed with the turbine (8) through threads, the holding section (5) is riveted with an anti-falling pin (22), the rotating handle (3) is connected with the holding section (5) through the anti-falling pin (22), the clamping section (4) is rotatably connected with a blocking handle (12), a clamping pin (13) is fixed on the blocking handle (12), the holding section (5) is rotatably connected with a locking block (14), an arc groove (15) is formed in the locking block (14), and one end of the blocking handle (12) is rotatably connected into the arc groove (15) of the locking block (14) through the clamping pin (13); an inclined hole (19) is formed in the holding section (5), internal threads are arranged in the inclined hole (19), a screw rod hole is formed in the middle of the locking block (14), a fixing screw rod (20) is arranged in the screw rod hole, a return spring (21) is sleeved on the fixing screw rod (20), and the fixing screw rod (20) is connected into the inclined hole (19) through threads; a through groove (16) is formed in the retaining handle (12), the movable pliers (2) penetrate through the through groove (16), a limiting screw (17) is fixed on the holding section (5), and the limiting screw (17) is located above the rack (11); and a limiting screw (18) used for limiting the stop handle (12) is fixed at the lower part of the holding section (5).