CN202790359U - Chain tensioning device - Google Patents
Chain tensioning device Download PDFInfo
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- CN202790359U CN202790359U CN 201220388877 CN201220388877U CN202790359U CN 202790359 U CN202790359 U CN 202790359U CN 201220388877 CN201220388877 CN 201220388877 CN 201220388877 U CN201220388877 U CN 201220388877U CN 202790359 U CN202790359 U CN 202790359U
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- fixed
- chain
- tensioning
- stretching device
- chain stretching
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Abstract
The utility model discloses a chain tensioning device and belongs to the operation technology field of oil field continuous tubes. The chain tensioning device comprises two tensioning hydraulic cylinders, two connection bushes and at least two pairs of guiding mechanisms. Two ends of a sprocket shaft are respectively fixed on the two connection bushes. Each tensioning hydraulic cylinder comprises a cylinder body and piston rods correspondingly connected with each connection bush. Each pair of guiding mechanisms comprises two guiding blocks installed on the cylinder body. A groove is formed in the opposite position of the periphery surface of the each connection bush, wherein each groove is correspondingly snapped on the guiding block in a sliding mode so as to limit motion trails of the corresponding connection bush, and the sprocket shaft is driven to move along the direction which is perpendicular to an axis of the sprocket shaft. Therefore, a chain is guaranteed to be always kept perpendicular, vibrations can not happen, and noises are reduced. In addition, by utilizing stretching of the piston rods of the tension hydraulic cylinders, the sprocket shaft is driven to move to achieve tensioning of the chain. Additional tensioning sprockets are not necessary and boundary dimension of an injection head is reduced.
Description
Technical field
The utility model relates to continuous-tube operation technique field, oil field, then particularly on a kind of continuous tube injection head with the chain stretching device of chain tension.
Background technique
Continuous tube injection head is the equipment that continuous-tube is lowered to and rises producing well, is the critical component of continuous-tube equipment.Continuous tube injection head comprises two chains that drive continuous-tube and be lowered to or trip out, can synchronous positive and negative running ground drives two oil hydraulic motors of corresponding chain and be installed in chain stretching device on the bearing pin of corresponding chain.Chain stretching device when clamping continuous-tube, by the corresponding chain of fluid motor-driven, makes corresponding chain along the continuous-tube axial motion by clamping that fluid cylinder promotes, and chain stretching device drives continuous-tube with frictional force between the continuous-tube and moves with identical speed.During continuous tube injection head work, chain need to have corresponding tension device to carry out tensioning, on the one hand to prevent chain releasing and to become flexible, do not produce abnormal sound; Offset on the other hand the effect of the injection force that produces when injection head injects continuous-tube, prevent the chain accumulation.
The tensioning mode of chain mainly contains two kinds at present: a kind of is outer tensioning mode, and the tensioning fluid cylinder is in the injection head both sides; The complex structure of this outer tensioning mode, and can increase the width of injection head, all more complicated are processed in design and installation.Another is lower tensioning mode, and the tensioning fluid cylinder is in the injection head bottom, the two ends of driven axle.Structure is relatively simple on the whole for this lower tensioning mode.Yet, descending an end of the tensioning fluid cylinder of tensioning mode to be connected casing with injection head by bearing pin at present and connect, the other end is connected with driven axle.Like this, when injection head was worked, driven axle is very easily axial motion in the course of the work, the use of sprocket wheel chain is produced disadvantageous factor, and can send noise.In addition, the tensioning fluid cylinder of lower tensioning mode is directly installed on outside the casing, and it is larger to take up room.And from the intensity aspect when other conditions are identical, the diameter of the longer required axle of driven axle length is also larger, therefore, lower tensioning mode is totally unfavorable concerning injection head external dimension and Weight-optimised aspect.
The model utility content
For the in the course of the work very easily axial motion and affect the problem of the physical dimension of corresponding injection head of the complex structure that solves above-mentioned chain stretching device, driven axle, the utility model embodiment provides a kind of chain stretching device.Technological scheme is as follows:
On the one hand, provide a kind of chain stretching device, it is installed in the casing of continuous tube injection head, and a sprocket wheel that is used for installing chain also is installed in the casing, and sprocket wheel comprises a sprocket shaft; Chain stretching device comprises two tensioning fluid cylinders, two connecting sleeves and at least two pairs of guide mechanisms that are installed in the casing; The two ends of sprocket shaft are separately fixed on two connecting sleeves; Each tensioning fluid cylinder comprises the piston rod that is fixed on the cylinder body in the casing and connects each corresponding connecting sleeve; Every a pair of guide mechanism comprises two guide pads that are installed on the casing, and the relative position of the outer circumferential face of each connecting sleeve is respectively equipped with a groove, and wherein, each groove is slidingly fastened on the guide pad of correspondence.
Further, also be fixed with a plurality of blocks on the casing, each guide pad is provided with a fixedly otch, and each block is fixed in the fixedly otch of each corresponding guide pad.
Further, each block is bolted on the casing.
Further, casing is provided with two shoulder holes, and each shoulder hole is fixed with the fluid cylinder bearing, and the cylinder body of each tensioning fluid cylinder is fixed on the corresponding fluid cylinder bearing.
Further, each shoulder hole place also is fixed with a clamp, and each clamp is supported on the bottom of corresponding cylinder body.
Further, each clamp is bolted on corresponding shoulder hole place.
Further, each connecting sleeve comprises first interface and the second interface, and the center line of first interface is vertical with the center line of the second interface, and the piston rod of corresponding tensioning fluid cylinder is fixed on first interface; The second interface is fixed respectively at the two ends of sprocket shaft.
Further, the bottom surface of each groove is vertical with the axis of corresponding connecting sleeve.
The beneficial effect that the technological scheme that the utility model embodiment provides is brought is: the complex structure, driven axle that has overcome existing chain stretching device be very easily axial motion and affect the problem of the physical dimension of corresponding injection head in the course of the work.Particularly, each tensioning fluid cylinder of chain stretching device of the present utility model links to each other with sprocket shaft, utilize the motion of telescopic band movable sprocket axle of the piston rod of each tensioning fluid cylinder to realize the tensioning of chain, not needing additionally increases tension sprocket, has reduced injection head boundary dimension.And the groove that utilizes each connecting sleeve is slidingly fastened with corresponding guide pad, limits the movement locus of corresponding connecting sleeve, moves along the direction perpendicular to its axis thereby drive sprocket shaft, and can not produce axial motion; Guaranteed that like this chain keeps plumbness always, can not shake, reduced noise.In addition, each tensioning fluid cylinder is installed in the shoulder hole of casing, and it is little to take up room.
Description of drawings
In order to be illustrated more clearly in the technological scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the master of the chain stretching device that provides of the utility model embodiment looks schematic representation;
Fig. 2 is that Fig. 1 is along the cross-sectional schematic of A-A line; And
Fig. 3 is that Fig. 2 is along the cross-sectional schematic of B-B line.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with accompanying drawing the utility model mode of execution is described in further detail.
Referring to Fig. 1, the utility model embodiment provides a kind of chain stretching device, and it is installed on the continuous tube injection head (not shown), is used for the chain (not shown) on the continuous tube injection head is carried out tension.This chain stretching device comprises two tensioning fluid cylinders 1, two connecting sleeve 3 and at least two pairs of guide mechanisms 5 that are fixed on the continuous tube injection head.
Please in conjunction with reference Fig. 2, continuous tube injection head comprises casing 6 and is installed in sprocket wheel 7 in the casing 6.Above-mentioned chain is installed on the corresponding sprocket wheel 7, and sprocket wheel 7 comprises a sprocket shaft 71.Chain stretching device of the present utility model all is fixed in the casing 6.Wherein, two tensioning fluid cylinders 1 lay respectively at the both sides of sprocket shaft 71, and each tensioning fluid cylinder 1 comprises a cylinder body 11 and the piston rod 13 that is connected with cylinder body 11.Preferably, in the present embodiment, offer rectangular two shoulder holes 61 with the level on the casing 6.The large end place of each shoulder hole 61 is fixed with fluid cylinder bearing 611, and the cylinder body 11 of each tensioning fluid cylinder 1 is fixedly mounted on the corresponding fluid cylinder bearing 611.In order to break away from the self-corresponding fluid cylinder bearing 611 of the cylinder body of tensioning fluid cylinder 1, preferably, each shoulder hole 61 place also is fixed with a clamp 633, and each clamp 633 is supported on the bottom of the cylinder body 11 of corresponding tensioning fluid cylinder 1, to support corresponding tensioning fluid cylinder 1.And in this use was novel, each clamp 633 was fixed on the casing 6 by bolt 8.
Each connecting sleeve 3 is installed in the small end place of corresponding shoulder hole 61, and each connecting sleeve 3 comprises first interface 31 and the second interface 33, and wherein the center line of first interface 31 center lines and the second interface 33 is mutually vertical.The piston rod 13 of each tensioning fluid cylinder 1 is fixed on corresponding first interface 31 after passing the small end place of corresponding shoulder hole 61.The two ends of sprocket shaft 71 are separately fixed in the second interface 33 of each connecting sleeve 3.Like this, when the piston rod 13 of tensioning fluid cylinder 1 stretches, drive 3 motions of corresponding connecting sleeve, thereby by 71 motions of connecting sleeve 3 drive sprocket shafts, to realize the tensioning of chain.In the present embodiment, the relative position of the outer circumferential face of each connecting sleeve 3 is respectively equipped with a groove 35, and the bottom surface of each groove 35 is vertical with the axis of corresponding connecting sleeve 3.
Please in conjunction with reference Fig. 3, the every pair of guide mechanism 5 is fixed on small end place or the large end place of corresponding shoulder hole 61 and the jointing place at small end place of corresponding shoulder hole 61.Every pair of guide mechanism 5 comprises two guide pads 51 that structure is identical.Each guide pad 51 correspondence is fastened in the groove 35 of corresponding connecting sleeve 3.Like this, when each tensioning fluid cylinder 1 drove 3 motion of corresponding connecting sleeve, connecting sleeve 3 slided along each guide pad 51, can not produce deflection or swing; And because the effect of keeping out of each guide pad 51, connecting sleeve 3 can't produce transverse movement, moves along the direction perpendicular to its axis thereby drive sprocket shaft 7, and can not produce axial motion.In this city mode of execution, be fixed with some blocks 9 by bolt 8 on the casing 6, each guide pad 51 is provided with a fixedly otch (not label), and each block 9 is fixed in the fixedly otch of each corresponding guide pad 51, thereby the guide pad 51 of correspondence is pressed on the casing 6.
By above-mentioned description as can be known: each tensioning fluid cylinder 1 of chain stretching device of the present utility model links to each other with sprocket shaft 71, utilize the motion of telescopic band movable sprocket axle 71 of the piston rod 13 of each tensioning fluid cylinder 1 to realize the tensioning of chain, do not need additionally to increase tension sprocket, the groove 35 that has reduced injection head boundary dimension and utilized each connecting sleeve 3 is slidingly fastened with corresponding guide pad 51, limit the movement locus of corresponding connecting sleeve 3, move along the direction perpendicular to its axis thereby drive sprocket shaft 7, and can not produce axial motion; Guaranteed that like this chain keeps plumbness always, can not shake, reduced noise.In addition, each tensioning fluid cylinder 1 is installed in the shoulder hole 61 of casing 6, and it is little to take up room.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. chain stretching device, it is installed in the casing (6) of continuous tube injection head, and a sprocket wheel (7) that is used for installing chain also is installed in the described casing (6), and described sprocket wheel (7) comprises a sprocket shaft (71);
It is characterized in that described chain stretching device comprises two tensioning fluid cylinders (1), two connecting sleeves (3) and at least two pairs of guide mechanisms (5) that are installed in the described casing (6);
The two ends of described sprocket shaft (71) are separately fixed on described two connecting sleeves (3);
Each described tensioning fluid cylinder (1) comprises the piston rod (13) that is fixed on the cylinder body (11) in the described casing (6) and connects each corresponding described connecting sleeve (3);
Every a pair of described guide mechanism (5) comprises two guide pads (51) that are installed on the described casing (6), the relative position of the outer circumferential face of each connecting sleeve (3) is respectively equipped with a groove (35), wherein, each groove (35) is slidingly fastened on the guide pad (51) of correspondence.
2. chain stretching device according to claim 1, it is characterized in that, also be fixed with a plurality of blocks (9) on the described casing (6), each guide pad (51) is provided with a fixedly otch, and each described block (9) is fixed in the fixedly otch of corresponding described each guide pad (51).
3. chain stretching device according to claim 2 is characterized in that, each described block (9) is fixed on the described casing (6) by bolt (8).
4. chain stretching device according to claim 1, it is characterized in that, described casing (6) is provided with two shoulder holes (61), each shoulder hole (61) is fixed with fluid cylinder bearing (611), and the cylinder body (11) of each described tensioning fluid cylinder (1) is fixed on the corresponding fluid cylinder bearing (611).
5. chain stretching device according to claim 4 is characterized in that, described each shoulder hole (61) locates also to be fixed with a clamp (633), and described each clamp (633) is supported on the bottom of corresponding cylinder body (11).
6. chain stretching device according to claim 5 is characterized in that, each described clamp (633) is fixed on corresponding shoulder hole (61) by bolt (8) and locates.
7. chain stretching device according to claim 1, it is characterized in that, each described connecting sleeve (3) comprises first interface (31) and the second interface (33), the center line of described first interface (31) is vertical with the center line of described the second interface (33), and the piston rod (13) of the tensioning fluid cylinder (1) of described correspondence is fixed on described first interface (31); Described the second interface (33) is fixed respectively at the two ends of described sprocket shaft (71).
8. chain stretching device according to claim 1 is characterized in that, the bottom surface of described each groove (35) is vertical with the axis of described corresponding connecting sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388877 CN202790359U (en) | 2012-08-07 | 2012-08-07 | Chain tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220388877 CN202790359U (en) | 2012-08-07 | 2012-08-07 | Chain tensioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790359U true CN202790359U (en) | 2013-03-13 |
Family
ID=47817625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220388877 Expired - Fee Related CN202790359U (en) | 2012-08-07 | 2012-08-07 | Chain tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455255A (en) * | 2014-11-26 | 2015-03-25 | 江苏新美星包装机械股份有限公司 | Chain tensioning mechanism |
-
2012
- 2012-08-07 CN CN 201220388877 patent/CN202790359U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455255A (en) * | 2014-11-26 | 2015-03-25 | 江苏新美星包装机械股份有限公司 | Chain tensioning mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20210807 |