CN103821466B - Clamper - Google Patents

Clamper Download PDF

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Publication number
CN103821466B
CN103821466B CN201310577923.9A CN201310577923A CN103821466B CN 103821466 B CN103821466 B CN 103821466B CN 201310577923 A CN201310577923 A CN 201310577923A CN 103821466 B CN103821466 B CN 103821466B
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China
Prior art keywords
slip spider
slips
nitrogen spring
link
cylinder
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CN201310577923.9A
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CN103821466A (en
Inventor
蒋法文
姚亚峰
黄晖
宋海涛
刘文军
石璐
吴桁
刘亦洋
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Xian Research Institute Co Ltd of CCTEG
Huainan Mining Group Co Ltd
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Xian Research Institute Co Ltd of CCTEG
Huainan Mining Group Co Ltd
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Priority to CN201310577923.9A priority Critical patent/CN103821466B/en
Publication of CN103821466A publication Critical patent/CN103821466A/en
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Abstract

The invention provides a kind of clamper, wherein, comprise left oil cylinder piston, left cylinder body, fore-set, left slip spider, left slips, right slip spider, right slips, slip spider spring, right oil cylinder piston, right cylinder body, guide rail, nitrogen spring seat and nitrogen spring; The left end of nitrogen spring seat is provided with nitrogen spring counterbore, the right-hand member of nitrogen spring seat is connected to the left end of right cylinder body, the end that ejects of right oil cylinder piston is arranged in the centre bore of nitrogen spring seat, the cylinder body of nitrogen spring is inserted in nitrogen spring counterbore, and be fixedly connected with nitrogen spring seat, the external part of the piston of nitrogen spring is connected to the right-hand member of right slip spider.Clamper provided by the invention, meets opening amount large simultaneously, and chucking power is large, and the requirement that size is little, and slips is after Long-Time Service weares and teares, chucking power there will not be heavy losses.

Description

Clamper
Technical field
The present invention relates to rig chucking device technology, particularly relate to a kind of clamper.
Background technology
Clamper is the important ingredient of rig, its objective is for clamping the drilling rod be arranged in clamping hole, preventing the drilling rod slippage in clamping hole, also can coordinate the unloading that gyrator carries out between two drilling rods.
At present, clamper is generally the clamper adopting multiple disk spring as flexible member, primarily of oil cylinder, multiple disk spring, slips, the compositions such as slip spider, when rig stops operation or needs the unloading operation carried out between two drilling rods, slips should be in clamped condition, when slips is in clamped condition, multiple butterfly spring is in its pre-compressed state, its pretightning force produced acts on slips by slip spider, for slips provides the chucking power of clamping drilling rod, the size of pretightning force is the elastic force of the pre compressed magnitude generation of single butterfly spring, the elastic force that chucking power is produced by single butterfly spring pre compressed magnitude determines.When rig carries out bore operation, slips should be in releasing orientation, the hydraulic oil entering oil cylinder promotes cylinder block and slip spider, and then overcome pretightning force, each disk spring is compressed further on the basis of pre compressed magnitude, and then makes slips unclamp drilling rod, the total deformation that multiple butterfly spring compresses further is opening amount, the little meeting of opening amount causes drilling rod and slips to rub mutually, occurs heavy wear.
At least there is following technological deficiency in actual applications in existing normally closed type clamper: when clamper need comparatively big uncork amount time, do not changing chucking power size on the one hand, under namely not changing the prerequisite of pre compressed magnitude of single disk spring, due to single disk spring, on the basis of pre compressed magnitude, the deformable amount of compression is very little further, total deformation can only be increased by the quantity increasing butterfly spring, and then increase opening amount, cause the size of clamper large, the occasion of narrow space can not be applied to, on the other hand, under the prerequisite of size not increasing clamper, namely do not increase the quantity of butterfly spring, can only by reducing the pre compressed magnitude of single disk spring, increase the deformable amount that single disk spring compresses further, and then increase total deformation, and then increase opening amount, cause chucking power not enough, the occasion needing large chucking power can not be applied to, in addition, slips is after Long-Time Service weares and teares, the slips and the slip spider that are in clamped condition move to clamping hole center, the pre compressed magnitude of single disk spring is reduced, because the elastic force of disk spring is large with the size variation of its compress variation, chucking power is caused to occur heavy losses.
Summary of the invention
The invention provides a kind of clamper, solve existing clamper and can not meet opening amount greatly simultaneously, chucking power is large, and the requirement that size is little, and slips is after Long-Time Service weares and teares, there is the problem of heavy losses in chucking power.
The invention provides a kind of clamper, wherein, comprise left oil cylinder piston, left cylinder body, fore-set, left slip spider, left slips, right slip spider, right slips, slip spider spring, right oil cylinder piston, right cylinder body, guide rail, nitrogen spring seat and nitrogen spring;
Described left oil cylinder piston is inserted in described left cylinder body, the inwall of described left oil cylinder piston and the inwall of described left cylinder body form the left oil pocket being used for injection liquid force feed, the end that ejects of described left cylinder body abuts with one end of described fore-set, described fore-set is arranged in described left slip spider, the other end of described fore-set abuts with the left end of described right slip spider, the ejecting to hold of the right-hand member of described right slip spider and described right oil cylinder piston abuts, described right oil cylinder piston is inserted in described right cylinder body, the inwall of described right oil cylinder piston and the inwall of described right cylinder body form the right oil pocket being used for injection liquid force feed, described left cylinder body, described left slip spider, described right slip spider is connected by connector with described right cylinder body,
The bottom of described left slip spider and described right slip spider is slidedly arranged on described guide rail, described left slip spider is fixedly installed described left slips, described right slip spider is fixedly installed described right slips, forms the clamping hole for wearing drilling rod between described left slips and described right slips;
The two ends of described slip spider spring abut with described left slip spider and described right slip spider respectively;
The left end of described nitrogen spring seat is provided with nitrogen spring counterbore, the right-hand member of described nitrogen spring seat is connected to the left end of described right cylinder body, the end that ejects of described right oil cylinder piston is arranged in the centre bore of described nitrogen spring seat, the cylinder body of described nitrogen spring is inserted in described nitrogen spring counterbore, and be fixedly connected with described nitrogen spring seat, the external part of the piston of described nitrogen spring is connected to the right-hand member of described right slip spider.
Clamper as above, wherein, preferably, the outer peripheral face of described nitrogen spring seat is also arranged with nitrogen spring cover, one end of described nitrogen spring cover is connected to the right-hand member of described right slip spider, is formed with the first interval of the piston deflection for limiting described nitrogen spring between the other end of described nitrogen spring cover and the left end of described right cylinder body.
Clamper as above, wherein, preferably, described guide rail is vertically provided with stop screw, be formed with second interval of sliding for limiting described right slip spider between the projection of described stop screw and described right slip spider to the right, the size at described second interval is the half at described first interval.
Clamper as above, wherein, preferably, described connector is screw rod and nut, described screw rod is arranged in the screw hole of described left cylinder body, described left slip spider, described right slip spider and described right cylinder body successively, and described nut is locked in the end of described screw rod.
Clamper as above, wherein, preferably, the two ends of described slip spider spring are connected to the left chuck of described left slip spider and the right chuck of described right slip spider respectively, described left chuck is arranged at the right-hand member aperture place of the screw hole of described left slip spider, described right chuck is arranged at the left end aperture place of the screw hole of described right slip spider, and described slip spider spring housing is located on described screw rod.
Clamper as above, wherein, preferably, described clamper also comprises two slips connectors, and described slips connector comprises inserted link, the first flat key and the second flat key;
Described left slip spider and described left slips are fixed by described slips connector, described inserted link is vertically arranged in the inserted link hole of described left slip spider and described left slips, move along the axis of described clamping hole for limiting described left slips, described first flat key and described second flat key are fixedly installed on described left slip spider, and lay respectively at the top and bottom of described left slips, rotate along the axis of described clamping hole for limiting described left slips;
Described right slip spider and described right slips are fixed by described slips connector, described inserted link is vertically arranged in the inserted link hole of described right slip spider and described right slips, move along the axis of described clamping hole for limiting described right slips, described first flat key and described second flat key are fixedly installed on described right slip spider, and lay respectively at the top and bottom of described right slips, rotate along the axis of described clamping hole for limiting described right slips.
Clamper as above, wherein, preferably, described slips connector also comprises inserted link tightening piece, and the front end of described left slip spider and described right slip spider all offers inserted link tightening hole;
Be equipped with described inserted link tightening piece in the inserted link tightening hole of described left slip spider, described inserted link tightening piece abuts with the described inserted link in the inserted link hole being arranged in described left slip spider;
Be equipped with described inserted link tightening piece in the inserted link tightening hole of described right slip spider, described inserted link tightening piece abuts with the described inserted link in the inserted link hole being arranged in described right slip spider.
Clamper as above, wherein, preferably, described inserted link tightening piece comprises the inserted link tightening post, inserted link tightening spring and the inserted link tightening screw element that set gradually;
The end of described inserted link tightening post abuts with described inserted link, and described inserted link tightening screw element is threaded with described inserted link tightening hole.
Clamper as above, wherein, preferably, also gasket ring is provided with between the piston of described nitrogen spring and the right-hand member of described right slip spider, the one side of described gasket ring abuts with the right-hand member of described right slip spider, and the another side of described gasket ring abuts with the external part of the piston of described nitrogen spring.
Clamper as above, wherein, preferably, the quantity of described nitrogen spring is multiple, the quantity of described nitrogen spring counterbore is multiple, the quantity of described nitrogen spring counterbore is equal with the quantity of described nitrogen spring, and multiple described nitrogen spring is uniformly distributed in and overlaps on the circle that geometric center is the center of circle with described nitrogen spring.
Clamper provided by the invention, adopt nitrogen spring as the flexible member providing elastic force, because the deformable amount of nitrogen spring is large, on the basis of pre compressed magnitude, the deformable amount of compression further has sufficient surplus, when needs comparatively big uncork amount time, only need increase the deflection of compression further, just the large requirement of opening amount can be met, and due to without the need to reducing pre compressed magnitude, also meet the large requirement of chucking power simultaneously, and do not increase due to the clamper size of the deformation direction at nitrogen spring, the size of clamper is little, can be applicable to the occasion of narrow space, in addition, because the elastic force of nitrogen spring is little with the size variation of its compress variation, there are wearing and tearing and cause the elastic force impact of the change of the pre compressed magnitude of nitrogen spring on nitrogen spring little in slips at Long-Time Service, chucking power there will not be heavy losses.
Accompanying drawing explanation
The structural representation of the clamper that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the left view of Fig. 1.
Reference numeral:
The left oil cylinder piston of 1-; The left cylinder body of 2-; 3-fore-set;
The left slip spider of 4-; The left slips of 5-; The right slip spider of 6-;
The right slips of 7-; 8-slip spider spring; The right oil cylinder piston of 9-;
10-right cylinder body 11-guide rail; 12-nitrogen spring seat;
13-nitrogen spring; 14-nitrogen spring cover 15-first interval;
16-stop screw; 17-second interval; 18-screw rod;
19-nut; 20-inserted link; 21-first flat key;
22-second flat key; 23-inserted link tightening post; 24-inserted link tightening spring;
25-inserted link tightening screw element; 26-gasket ring.
Detailed description of the invention
The structural representation of the clamper that Fig. 1 provides for the embodiment of the present invention, Fig. 2 is the left view of Fig. 1.As depicted in figs. 1 and 2, the invention provides a kind of clamper, wherein, left oil cylinder piston 1, left cylinder body 2, fore-set 3, left slip spider 4, left slips 5, right slip spider 6, right slips 7, slip spider spring 8, right oil cylinder piston 9, right cylinder body 10, guide rail 11, nitrogen spring seat 12 and nitrogen spring 13 is comprised, left oil cylinder piston 1 is inserted in left cylinder body 2, the inwall of left oil cylinder piston 1 and the inwall of left cylinder body 2 form the left oil pocket being used for injection liquid force feed, the end that ejects of left cylinder body 2 abuts with one end of fore-set 3, fore-set 3 is arranged in left slip spider 4, the other end of fore-set 3 abuts with the left end of right slip spider 6, the ejecting to hold of the right-hand member of right slip spider 6 and right oil cylinder piston 9 abuts, right oil cylinder piston 9 is inserted in right cylinder body 10, the inwall of right oil cylinder piston 9 and the inwall of right cylinder body 10 form the right oil pocket being used for injection liquid force feed, left cylinder body 2, left slip spider 4, right slip spider 6 is connected by connector with right cylinder body 10, the bottom of left slip spider 4 and right slip spider 6 is slidedly arranged on guide rail 11, and left slip spider 4 is fixedly installed left slips 5, and right slip spider 6 is fixedly installed right slips 7, forms the clamping hole for wearing drilling rod between left slips 5 and right slips 7, the two ends of slip spider spring 8 abut with left slip spider 4 and right slip spider 6 respectively,
The left end of nitrogen spring seat 12 is provided with nitrogen spring counterbore, the right-hand member of nitrogen spring seat 12 is connected to the left end of right cylinder body 10, the end that ejects of right oil cylinder piston 9 is arranged in the centre bore of nitrogen spring seat 12, the cylinder body of nitrogen spring 13 is inserted in nitrogen spring counterbore, and be fixedly connected with nitrogen spring seat 12, the external part of the piston of nitrogen spring 13 is connected to the right-hand member of right slip spider 6.
The clamper that the present embodiment provides in actual applications, when rig stops operation, clamper is in initial closed state, nitrogen spring 13 is in its pre-compressed state, acted on right slip spider 6 by the precommpression elastic force of nitrogen spring 13, and clamp the drilling rod in clamping hole by right slips 7 and left slips 5.
When rig carries out bore operation, clamper need be made to be in open configuration, hydraulic oil is from after the joint be connected to left oil cylinder piston 1 enters left oil pocket, hydraulic oil promotes left cylinder body 2 and moves right, the fore-set 3 abutted with left cylinder body 2 promotes right slip spider 6 and slides to the right along guide rail 11, right slip spider 6 is compressed nitrogen spring 13 further, in the process that right slip spider 6 slides to the right, left slip spider 4 slides left simultaneously under the effect of the elastic force of slip spider spring 8, left slips 5 and right slips 7 open and unclamp drilling rod, when after the hydraulic oil release in left oil pocket, under the elastic force effect of nitrogen spring 13, right slip spider 6 slides left, left slips 5 and right slips 7 clamp drilling rod again, initial closed state got back to by clamper.
When needing the unloading operation carried out between two drilling rods, clamper is in closure state, hydraulic oil is from after the joint be connected to right cylinder body 10 enters right oil pocket, hydraulic oil promotes right oil cylinder piston 9 and is moved to the left and holds out against right slip spider 6, nitrogen spring 13 is in its pre-compressed state, also act on right slip spider 6 by the precommpression elastic force of nitrogen spring 13 simultaneously, jointly clamped the drilling rod in clamping hole by right slips 7 and left slips 5.
In addition, in actual applications, left oil pocket and right oil cylinder can not oil-feeds simultaneously for clamper, can only side oil-feed, ensure that clamper can only be in and open or closure state.
Clamper provided by the invention, adopt nitrogen spring as the flexible member providing elastic force, because the deformable amount of nitrogen spring is large, on the basis of pre compressed magnitude, the deformable amount of compression further has sufficient surplus, when needs comparatively big uncork amount time, only need increase the deflection of compression further, just the large requirement of opening amount can be met, and due to without the need to reducing pre compressed magnitude, also meet the large requirement of chucking power simultaneously, and do not increase due to the clamper size of the deformation direction at nitrogen spring, the size of clamper is little, can be applicable to the occasion of narrow space, in addition, because the elastic force of nitrogen spring is little with the size variation of its compress variation, there are wearing and tearing and cause the elastic force impact of the change of the pre compressed magnitude of nitrogen spring on nitrogen spring little in slips at Long-Time Service, chucking power there will not be heavy losses.
On the basis of the technical scheme of above-described embodiment, preferably, the outer peripheral face of nitrogen spring seat 12 is also arranged with nitrogen spring cover 14, one end of nitrogen spring cover 14 is connected to the right-hand member of right slip spider 6, is formed with the first interval 15 of the piston deflection for limiting nitrogen spring 13 between the other end of nitrogen spring cover 14 and the left end of right cylinder body 10.After the other end of nitrogen spring cover 14 contacts with the left end of right cylinder body 10, the piston deflection of nitrogen spring 13 is maximum, the opening amount of clamper is maximum, the opening amount of clamper is determined by the size at the first interval 15, the size at the first interval 15 should be less than the deformable amount of nitrogen spring 13, namely the opening amount of clamper is determined jointly by the deformable amount of nitrogen spring 13 and the length of nitrogen spring cover 14, and the location utilizing nitrogen spring to overlap 14 can prevent nitrogen spring 13 by conquassation.
On the basis of the technical scheme of above-described embodiment, preferably, guide rail 11 is vertically provided with stop screw 16, the size be formed between the projection of stop screw 16 and right slip spider 6 for limiting the second interval 17, interval 17, second that right slip spider 6 slides to the right is the half at the first interval 15.Spacing by stop screw 16, define the distance that right slip spider 6 slides to the right, the distance that right slip spider 6 slides to the right is determined by the second interval 17, size due to the second interval 17 is the half at the first interval 15, the distance that left slip spider 4 slides left simultaneously under the effect of the elastic force of slip spider spring 8 is also the half at the first interval 15, after clamper opens, the clamping hole center that left slips 4 and right slips 6 are formed is constant, be consistent with under clamper closure state, ensure that the centering of the left slips of clamper 4 and right slips.
On the basis of the technical scheme of above-described embodiment, preferably, connector is screw rod 18 and nut 19, screw rod 18 is arranged in the screw hole of left cylinder body 2, left slip spider 4, right slip spider 6 and right cylinder body 10 successively, nut 19 is locked in the end of screw rod 18, structure is simple, and reliability is high, is convenient to handling.
On the basis of the technical scheme of above-described embodiment, preferably, the two ends of slip spider spring 8 are connected to the left chuck of left slip spider 4 and the right chuck of right slip spider 6 respectively, left chuck and right chuck not shown, left chuck is arranged at the right-hand member aperture place of the screw hole of left slip spider 4, right chuck is arranged at the left end aperture place of the screw hole of right slip spider 6, and slip spider spring 8 is sheathed on screw rod 18.
On the basis of the technical scheme of above-described embodiment, as depicted in figs. 1 and 2, preferably, clamper also comprises two slips connectors, and slips connector comprises inserted link 20, first flat key 21 and the second flat key 22; Left slip spider 4 and left slips 5 are fixed by slips connector, inserted link 20 is vertically arranged in the inserted link hole of left slip spider 4 and left slips 5, move along the axis of clamping hole for limiting left slips 5, first flat key 21 and the second flat key 22 are fixedly installed on left slip spider 4, and lay respectively at the top and bottom of left slips 5, rotate along the axis of clamping hole for limiting left slips 5; Right slip spider 6 and right slips 7 are fixed by slips connector, inserted link 20 is vertically arranged in the inserted link hole of right slip spider 6 and right slips 7, move along the axis of clamping hole for limiting right slips 7, first flat key 21 and the second flat key 22 are fixedly installed on right slip spider 6, and lay respectively at the top and bottom of right slips 7, rotate along the axis of clamping hole for limiting right slips 7.By the fixed form of inserted link 20, first flat key 21 and the second flat key 22, can be convenient to left slips 5 from left slip spider 4 and right slips 7 dismantle from right slip spider 6.
On the basis of the technical scheme of above-described embodiment, preferably, slips connector also comprises inserted link tightening piece, and the front end of left slip spider 4 and right slip spider 6 all offers inserted link tightening hole; Be equipped with inserted link tightening piece in the inserted link tightening hole of left slip spider 4, inserted link tightening piece abuts with the inserted link 20 in the inserted link hole being arranged in left slip spider 4; Be equipped with inserted link tightening piece in the inserted link tightening hole of right slip spider 6, inserted link tightening piece abuts with the inserted link 20 in the inserted link hole being arranged in right slip spider 6.For left slip spider 4 and left slips 5, inserted link tightening piece can be connected on the face of cylinder of inserted link 20, radial load is applied to inserted link 20, inserted link 20 and left slip spider 4 are contacted also stressed mutually with the inserted link hole of left slips 5, ensure axis fixed of left slips 5 along clamping hole, inserted link tightening piece fixedly repeats no more right slip spider 6 and right slips 7.
On the basis of the technical scheme of above-described embodiment, preferably, as shown in Figure 2, inserted link tightening piece comprises the inserted link tightening post 23, inserted link tightening spring 24 and the inserted link tightening screw element 25 that set gradually; The end of inserted link tightening post 23 abuts with inserted link 20, and inserted link tightening screw element 25 is threaded with inserted link tightening hole.
Because inserted link tightening screw element 25 is threaded with inserted link tightening hole, inserted link tightening piece can by tightening or unscrewing inserted link tightening screw element 25, regulate the elastic force of inserted link tightening spring 24, and then regulating action is in the radial load of inserted link 20, the left slips of further guarantee 5 or right slips 7 are along axis fixed of clamping hole, in addition, when dismantling left slips 5 or right slips 7, only need unscrew inserted link tightening screw element 25, remove the radial load acting on inserted link 20, inserted link 20 is extracted out from clamper upper end, left slips 5 or right slips 7 just can be extracted out along the axis of clamping hole, convenient disassembly.
On the basis of the technical scheme of above-described embodiment, preferably, also be provided with gasket ring 26 between the piston of nitrogen spring 13 and the right-hand member of right slip spider 6, the one side of gasket ring 26 abuts with the right-hand member of right slip spider 6, and the another side of gasket ring 26 abuts with the external part of the piston of nitrogen spring 13.Use gasket ring 26 to transmit the elastic force of nitrogen spring 13, can improve stressed.
On the basis of the technical scheme of above-described embodiment, preferably, the quantity of nitrogen spring 13 is multiple, the quantity of nitrogen spring counterbore is multiple, the quantity of nitrogen spring counterbore is equal with the quantity of nitrogen spring 13, and multiple nitrogen spring 13 is uniformly distributed in and overlaps on the circle that 12 geometric centers are the center of circle with nitrogen spring.
When the chucking power that clamper needs is larger, under the prerequisite of the opening amount of the pre compressed magnitude and clamper that do not change single nitrogen spring 13, the quantity of nitrogen spring 13 can be increased to increase the chucking power of clamper, simultaneously because nitrogen spring 13 is even circumferential layout, increase the appearance and size that the quantity of nitrogen spring 13 can not increase clamper, further increase the chucking power of the clamper be applied under narrow space occasion.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (9)

1. a clamper, is characterized in that, comprises left oil cylinder piston, left cylinder body, fore-set, left slip spider, left slips, right slip spider, right slips, slip spider spring, right oil cylinder piston, right cylinder body, guide rail, nitrogen spring seat and nitrogen spring;
Described left oil cylinder piston is inserted in described left cylinder body, the inwall of described left oil cylinder piston and the inwall of described left cylinder body form the left oil pocket being used for injection liquid force feed, the end that ejects of described left cylinder body abuts with one end of described fore-set, described fore-set is arranged in described left slip spider, the other end of described fore-set abuts with the left end of described right slip spider, the ejecting to hold of the right-hand member of described right slip spider and described right oil cylinder piston abuts, described right oil cylinder piston is inserted in described right cylinder body, the inwall of described right oil cylinder piston and the inwall of described right cylinder body form the right oil pocket being used for injection liquid force feed, described left cylinder body, described left slip spider, described right slip spider is connected by connector with described right cylinder body,
The bottom of described left slip spider and described right slip spider is slidedly arranged on described guide rail, described left slip spider is fixedly installed described left slips, described right slip spider is fixedly installed described right slips, forms the clamping hole for wearing drilling rod between described left slips and described right slips;
The two ends of described slip spider spring abut with described left slip spider and described right slip spider respectively;
The left end of described nitrogen spring seat is provided with nitrogen spring counterbore, the right-hand member of described nitrogen spring seat is connected to the left end of described right cylinder body, the end that ejects of described right oil cylinder piston is arranged in the centre bore of described nitrogen spring seat, the cylinder body of described nitrogen spring is inserted in described nitrogen spring counterbore, and be fixedly connected with described nitrogen spring seat, the external part of the piston of described nitrogen spring is connected to the right-hand member of described right slip spider;
Described clamper also comprises two slips connectors, and described slips connector comprises cylindrical inserted link, the first flat key and the second flat key;
Described left slip spider and described left slips are fixed by described slips connector, described cylindrical inserted link is vertically arranged in the inserted link hole of described left slip spider and described left slips, move along the axis of described clamping hole for limiting described left slips, described first flat key and described second flat key are fixedly installed on described left slip spider, and lay respectively at the top and bottom of described left slips, rotate along the axis of described clamping hole for limiting described left slips;
Described right slip spider and described right slips are fixed by described slips connector, described cylindrical inserted link is vertically arranged in the inserted link hole of described right slip spider and described right slips, move along the axis of described clamping hole for limiting described right slips, described first flat key and described second flat key are fixedly installed on described right slip spider, and lay respectively at the top and bottom of described right slips, rotate along the axis of described clamping hole for limiting described right slips.
2. clamper according to claim 1, it is characterized in that, the outer peripheral face of described nitrogen spring seat is also arranged with nitrogen spring cover, one end of described nitrogen spring cover is connected to the right-hand member of described right slip spider, is formed with the first interval of the piston deflection for limiting described nitrogen spring between the other end of described nitrogen spring cover and the left end of described right cylinder body.
3. clamper according to claim 2, it is characterized in that, described guide rail is vertically provided with stop screw, be formed with second interval of sliding for limiting described right slip spider between the projection of described stop screw and described right slip spider to the right, the size at described second interval is the half at described first interval.
4. clamper according to claim 1, it is characterized in that, described connector is screw rod and nut, and described screw rod is arranged in the screw hole of described left cylinder body, described left slip spider, described right slip spider and described right cylinder body successively, and described nut is locked in the end of described screw rod.
5. clamper according to claim 4, it is characterized in that, the two ends of described slip spider spring are connected to the left chuck of described left slip spider and the right chuck of described right slip spider respectively, described left chuck is arranged at the right-hand member aperture place of the screw hole of described left slip spider, described right chuck is arranged at the left end aperture place of the screw hole of described right slip spider, and described slip spider spring housing is located on described screw rod.
6. clamper according to claim 1, is characterized in that, described slips connector also comprises inserted link tightening piece, and the front end of described left slip spider and described right slip spider all offers inserted link tightening hole;
Be equipped with described inserted link tightening piece in the inserted link tightening hole of described left slip spider, described inserted link tightening piece abuts with the described cylindrical inserted link in the inserted link hole being arranged in described left slip spider;
Be equipped with described inserted link tightening piece in the inserted link tightening hole of described right slip spider, described inserted link tightening piece abuts with the described cylindrical inserted link in the inserted link hole being arranged in described right slip spider.
7. clamper according to claim 6, is characterized in that, described inserted link tightening piece comprises the inserted link tightening post, inserted link tightening spring and the inserted link tightening screw element that set gradually;
The end of described inserted link tightening post abuts with described cylindrical inserted link, and described inserted link tightening screw element is threaded with described inserted link tightening hole.
8. according to the arbitrary described clamper of claim 1-7, it is characterized in that, also gasket ring is provided with between the piston of described nitrogen spring and the right-hand member of described right slip spider, the one side of described gasket ring abuts with the right-hand member of described right slip spider, and the another side of described gasket ring abuts with the external part of the piston of described nitrogen spring.
9. according to the arbitrary described clamper of claim 1-7, it is characterized in that, the quantity of described nitrogen spring is multiple, the quantity of described nitrogen spring counterbore is multiple, the quantity of described nitrogen spring counterbore is equal with the quantity of described nitrogen spring, and multiple described nitrogen spring is uniformly distributed in and overlaps on the circle that geometric center is the center of circle with described nitrogen spring.
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CN104989298A (en) * 2015-07-20 2015-10-21 淮南矿业(集团)有限责任公司 Holder
CN107575173B (en) * 2017-10-11 2019-04-30 中煤科工集团西安研究院有限公司 Have the drill-rod clamping erection device and drilling righting method of two-way position compensation function
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