CN114562307A - Constant-resistance anchor cable withdrawal device and design method - Google Patents
Constant-resistance anchor cable withdrawal device and design method Download PDFInfo
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- CN114562307A CN114562307A CN202111207900.XA CN202111207900A CN114562307A CN 114562307 A CN114562307 A CN 114562307A CN 202111207900 A CN202111207900 A CN 202111207900A CN 114562307 A CN114562307 A CN 114562307A
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- 239000003245 coal Substances 0.000 description 3
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- 238000011084 recovery Methods 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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Abstract
The invention discloses a constant-resistance anchor cable withdrawal device and a design method thereof. The clamping piece is fixed through the unidirectional rotating wheel structure, so that the anchor cable and the clamping piece are relatively displaced to realize the separation of the anchor cable and the clamping piece, the anchor withdrawing process is completed, the problem that the clamping piece cannot be taken out manually to complete the anchor withdrawing because the constant-resistance anchor cable normally retracts in the working process and the lock enters the sleeve is solved, the principle is simple, the operation is convenient, the labor intensity of workers is reduced, the anchor withdrawing operation efficiency is improved, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of anchor withdrawing devices for underground coal mine anchor rods, in particular to an anchor withdrawing device for a constant-resistance anchor cable and a design method.
Background
The anchor rod cable withdrawing device is a special tool for withdrawing the anchor rod cable in a coal mine, and is mainly used for withdrawing the anchor rod cable before the stoping of a roadway supported by the anchor rod cable so as to realize quick roof caving and lockset recovery. With the increase of the coal mining depth, the underground environment is complex and changeable, and the anchor cable is required to provide constant working resistance and stable deformation, so that the constant-resistance large-deformation anchor cable is widely applied to practical engineering. Because the constant-resistance anchor rope has the contractibility, the retraction in different degrees is realized during the working process, so that the lockset enters the sleeve of the constant-resistance anchor rope, and the recovery by adopting a common anchor withdrawing device is quite difficult. The problem that the stoping roadway suspended ceiling area is large, the goaf roof is not prone to collapse and the like is also caused when the lockset cannot be recycled due to the fact that the constant-resistance anchor cable cannot be timely recycled. Therefore, on the background of solving the problems, a constant-resistance anchor cable withdrawal device which is simple to operate, efficient and economical and a design method are urgently needed.
Disclosure of Invention
In order to achieve the purpose, the invention adopts the following technical scheme:
a constant-resistance anchor cable withdrawing device comprises a top pressing head and a clamping device, wherein the top pressing head is a hollow cylinder, the front end of the top pressing head is provided with a clamping groove, the clamping device is arranged in the clamping groove, and the rear end of the top pressing head is connected with an anchor withdrawing jack;
inside unidirectional rotating wheel and the stop device of being provided with of screens ware, unidirectional rotating wheel includes rigid connection's blade and ratchet, the ratchet is equipped with fin form latch, and the ratchet is fixed at screens ware inner wall through the pivot with the blade, stop device includes blend stop and spring, blend stop one end and ratchet latch contact, the other end is articulated with the screens ware, spring one end and blend stop vertical contact, the other end is connected with the screens ware.
The included angles of the adjacent blades of the unidirectional rotating wheel are equal, and the working range of the blades is not more than the outer wall of the top pressure head.
The number of the clamping grooves at the front end of the jacking head is at least two, and the clamping grooves are distributed at equal intervals in the jacking head in the annular direction.
The outer contour of the clamping device is matched with the clamping groove of the jacking head, and the front end of the jacking head is connected with the clamping device in a detachable connection mode including threaded connection and hook connection.
A design method of the constant-resistance anchor cable withdrawal device of claim 1, comprising the following steps:
s1: acquiring the size of a lockset used by a constant-resistance anchor cable to be withdrawn; the dimensions include: outer diameter of anchor ringAMaximum outer diameter of the clamping pieceaNormal operation of anchor cableThe included angle between the outer surface of the clamping piece and the horizontal direction during operationβAnd the exposed length of the clamping pieceS；
S2: determining ram wall thicknesshAnd circumferential distance between the outer wall of the clamping groovel(ii) a The top pressure head contacts the anchor ring only at the front end, is not in contact with the constant-resistance anchor cable sleeve and the clamping piece, and the outer diameter of the top pressure head is equal to the outer diameter of the anchor ring, so the wall thickness is thickhThe geometrical relationship is satisfied: 0 < (R) >h≤(A－a) 2; the number of the clamping grooves arranged in the circumferential direction of the top pressure head is defined asnThe arc length of the outer wall of a single clamping groove ismThen circumferential spacing of outer wall of the slotlThe geometrical relationship is satisfied:l=(πA－m×n)/n（1）；
s3: determining a reasonable radius of a unidirectional rotating wheelRAnd angle of adjacent bladesθ(ii) a Defining the minimum horizontal distance between the inner wall of the top pressure head and the clamping sheet as an equal;
theoretical radius of unidirectional runnerRThe geometrical relationship is satisfied: Δ <R＜hIn order to ensure that the axis of the unidirectional rotating wheel is positioned near the middle diameter of the wall thickness of the top pressure head cylinder, the radius of the rotating wheel is optimized on the theoretical basisRAccording to the geometric relationship, the value range is reduced as follows: (h+∆)/2≤R≤(h+∆+S/tanβ)/2（2）；
After the specific radius of the runner is determined, the included angle between adjacent bladesθSatisfies the geometrical relationship of the formula (3) and the formula (4),
R+Rcos(θ 1/2)=h+∆（3）
θ 1/2＋β－θ 2/2=π/2（4）
in the formula (I), the compound is shown in the specification,θ 1、θ 2respectively has a radius ofRAngle between adjacent bladesθTo obtain the included angle of adjacent blades at the determined radius of the runnerθHas a value range ofθ 2≤θ＜θ 1。
The invention has the beneficial effects that:
1. the constant-resistance anchor rope clamping device realizes contact with an anchor ring in a constant-resistance anchor rope sleeve through the jacking head, is matched with the anchor withdrawing jack to draw the anchor rope, and utilizes the one-way rotating wheel structure in the clamping device to fix the position of the clamping piece, so that the clamping piece is stripped from the anchor rope during return stroke of the jack, the problem that a lock is difficult to recover when entering the sleeve due to retraction of the constant-resistance anchor rope is solved, the recycling of materials is facilitated, the cost is reduced, and the support is relieved before recovery, so that the management of a top plate is facilitated.
2. The main body structure of the invention is a hollow cylinder, the front end of the top pressure head which needs to contact the working anchor ring is provided with a groove and a clamping device, the assembly and disassembly are easy, the clamping device can be reused only by manually replacing the clamping device when damaged, the principle of the clamping device is simple, the anchor withdrawing process does not need additional manual operation, the labor intensity of workers is reduced, and the anchor withdrawing efficiency is improved.
Drawings
Fig. 1 is a schematic view of a radial section structure of a constant-resistance anchor cable withdrawal device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a top press structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of the ram of an embodiment of the present invention;
FIG. 4 is a left side view of the top ram of an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a card stopper according to an embodiment of the present invention;
FIG. 6 is a left side view of the detent mechanism according to the embodiment of the present invention;
FIG. 7 is a cross-sectional view of a retainer B-B according to an embodiment of the present invention;
FIG. 8 is a schematic view of a barrier strip according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a geometric relationship according to an embodiment of the present invention.
In FIGS. 1 to 9: 1-top pressure head, 2-position retainer, 3-blade, 4-ratchet wheel, 5-rotating shaft, 6-barrier strip, 7-spring, 81-position retainer through hole, 82-top pressure head through hole and 9-clamping groove.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited thereto.
Example 1
As shown in fig. 1 to 9, a constant-resistance anchor cable withdrawal device comprises a top pressure head 1 and a position clamping device 2; the main structure of the top pressing head 1 is a hollow cylinder, the front end of the top pressing head is provided with a clamping groove 9 for installing the clamping device 2, the outer contour of the clamping device 2 is matched with the clamping groove 9, and the outer wall of the top pressing head 1 is not provided with a convex part after the installation is finished; a radial through hole 82 is formed in the clamping groove 9, threads are formed in the inner wall of the through hole 82, the through hole 81 with the same specification are arranged on the clamping device 2, and the clamping device 2 is fixed in the clamping groove 9 of the ejector head 1 through a bolt; the rear end of the jacking head 1 is connected with the anchor withdrawing jack in a threaded connection mode.
The main structure of the clamping device 2 is a shell, a one-way rotating wheel and a limiting device are arranged in the shell, the one-way rotating wheel comprises blades 3 and a ratchet wheel 4, included angles of adjacent blades 3 are equal, the working range of each blade 3 is not larger than the outer wall of the top pressure head 1, and the phenomenon that the blades 3 are clamped or damaged due to the fact that the inner space of the outer sleeve of the top pressure head 1 is narrow is avoided; the ratchet wheel 4 is provided with a fin-shaped latch and is matched with the barrier strip 6 to work so that the rotating wheel can only rotate in one direction; the ratchet wheel 4 is rigidly connected with the blade 3 and fixed on the inner wall of the shell of the position clamping device 2 through the rotating shaft 5, the rotating shaft 5 is a long bolt, a groove is formed in the inner wall of one side of the shell of the position clamping device 2, threads are arranged on the inner wall of the groove, a through hole is formed in the opposite side of the inner wall of the groove, the radius of the through hole is consistent with that of the head of the bolt, the tail of the bolt penetrates through the through hole and is screwed with the groove when the bolt is assembled, the head of the bolt is arranged in the through hole, and the outer wall of the shell of the position clamping device 2 is not provided with a convex part; the limiting device comprises a barrier strip 6 and a spring 7, the side surface of the rigid barrier strip 6 is close to the inner wall of the shell of the clamping device 2, one end of the rigid barrier strip, which is contacted with the clamping teeth of the ratchet 4, is provided with a sharp corner, the other end of the rigid barrier strip is hinged with the shell of the clamping device 2, and the hinged part is exposed out of the outer surface of the shell of the clamping device 2; one end of the spring 7 is fixedly connected with the inner wall of the shell of the position clamping device 2, and the other end vertically extrudes the barrier strip 6.
Example 2
As shown in fig. 9, a method for designing a constant-resistance anchor cable withdrawal device according to an embodiment of the present invention includes the following steps:
the main design content comprises the wall thickness of a top pressure head, the mounting position of a clamping groove, the radius of a rotating wheel and the included angle of adjacent blades; the wall thickness of the jacking head is influenced by the size of a constant-resistance anchor rope lock to be withdrawn, the mounting position of the clamping groove is determined by the size of an anchor ring to be withdrawn and the size of the clamping device, and the radius of the rotating wheel and the included angle of adjacent blades are determined by the geometric relationship of the unidirectional rotating wheel during operation.
S1: acquiring the size of a lockset used by a constant-resistance anchor cable to be withdrawn; according to the factThe values are as follows: outer diameter of anchor ringAIs 68mm, and the maximum outer diameter of the clamping pieceaIs 44mm, and the included angle between the outer surface of the clamping piece and the horizontal direction when the anchor cable normally worksβIs 84 degrees and the exposed length of the clamping pieceSIs 12 mm.
S2: determining ram wall thicknesshAnd circumferential distance between the outer wall of the clamping groovel(ii) a The top pressure head is required to enter the constant-resistance anchor rope sleeve when working, so that the outer diameter is smaller than the inner diameter of the constant-resistance anchor rope sleeve, when the anchor rope is drawn, the top pressure head only supports against the anchor ring, the clamping piece is pulled out of the anchor ring along with the anchor rope, so that the inner diameter is larger than the outer diameter of the maximum end of the clamping piece, and the outer diameter of the top pressure head is equal to the outer diameter of the anchor ringA=68mm, therefore the thickness of the wallhSatisfies the relationship: 0 < (R) >h≤(A－a) 2=12mm, the wall thickness of the top pressure head is 0 <hLess than or equal to 12mm, considering the possible scratch with the clamping piece, takingh=10 mm. Assuming that the number of the clamping grooves arranged in the circumferential direction of the top pressure head is 2, the arc length of the outer wall of a single clamping groove is 50mm, and the circumferential distance between the outer walls of the clamping grooveslThe geometrical relationship is satisfied:l=(πA－m×n)/n=(π×68－40×2)/2=66.76mm。
s3: determining a reasonable radius of a unidirectional rotating wheelRAnd angle of adjacent bladesθ(ii) a Minimum horizontal distance between inner wall of top pressure head and clamping piece =A－a)/2-h=2 mm; the rotating shaft of the unidirectional rotating wheel is arranged in the clamping device, when the unidirectional rotating wheel works, the rotating wheel cannot exceed the outer wall of the jacking head and the notch at the front end of the jacking head, on the other hand, at least one blade is required to contact with the lockset clamping piece, the clamping device can only play a role under the condition that the clamping piece can be contacted, and theoretically, the radius of the unidirectional rotating wheel isRThe geometrical relationship is satisfied: 2mm < (R) >R＜10mm；
In order to facilitate installation, the axis of the unidirectional rotating wheel is positioned near the middle diameter of the wall thickness of the top pressure head cylinder as much as possible, and the radius of the rotating wheel is optimized on the theoretical basisRWhen the center of the one-way rotating wheel shaft is closest to the thickness and the pitch diameter of the wall of the jacking head, the diameter of the rotating wheel is the minimum horizontal distance from the outer wall of the jacking head to the clamping piece; the radius of the runner is determined by the geometric relationship between the maximum diameter of the runner and the exposed length of the clamping pieceRThe value range of (A) is reduced to: (h+∆)/2≤R≤(h+∆+S/tanβ) Per 2, calculating the available wheel radiusThe value range is less than or equal to 6mmRWhen the diameter is less than or equal to 6.63mm, the center of the rotating shaft is closest to the middle diameter of the top pressure head, so that the installation is convenient;
the radius of the trial blade is 6.5mm, and the included angle between the adjacent bladesθSatisfies the geometrical relationship of the formula (1) and the formula (2),
R+Rcos(θ 1/2)=h+∆（1）
θ 1/2＋β－θ 2/2=π/2（2）
to obtain a radius of 6.5mmθ 1=115.59°，θ 2=103.59 degrees, and blade included angle can be obtainedθThe value range is equal to or less than 103.59 degreesR＜115.59°。
Example 3
Exposed length of clamping piece during normal operation of anchor cableSAt 40mm, the wall thickness of the opposite pressing headhAnd circumferential distance between the outer wall of the clamping groovelAll the values of (A) have no influence, so that the wall thickness of the top pressure head is still takenh=10mm, circumferential distance between outer walls of clamping groovesl=66.76mm；
Corresponding radius of wheelRThe reduced value range is less than or equal to 6mmRLess than or equal to 8.10mm, the radius of the trial rotating wheel is 8mm, and the included angle between the adjacent blades isθSatisfies the geometrical relationship of the formula (1) and the formula (2),
R+Rcos(θ 1/2)=h+∆（1）
θ 1/2＋β－θ 2/2=π/2（2）
to obtain a radius of 8mmθ 1=120°，θ 2=108 ° available blade included angleθThe value range is less than or equal to 108 degreesR＜120°。
Claims (5)
1. The utility model provides a constant resistance anchor rope moves back anchor device, includes top pressure head and screens ware, its characterized in that: the jacking head is a hollow cylinder, a clamping groove is formed in the front end of the jacking head, a clamping device is installed in the clamping groove, and the rear end of the jacking head is connected with the anchor withdrawing jack;
the inside one-way runner and the stop device of being provided with of screens ware, one-way runner includes rigid connection's blade and ratchet, the ratchet is equipped with fin form latch, and the ratchet is fixed at screens ware inner wall through the pivot with the blade, stop device includes blend stop and spring, blend stop one end and ratchet latch contact, the other end is articulated with the screens ware, spring one end and blend stop vertical contact, the other end is connected with the screens ware.
2. The constant-resistance anchor cable withdrawal device according to claim 1, wherein: the included angles of the adjacent blades of the unidirectional rotating wheel are equal, and the working range of the blades is not more than the outer wall of the top pressure head.
3. The constant-resistance anchor cable withdrawal device according to claim 1, wherein: the number of the clamping grooves at the front end of the jacking head is at least two, and the clamping grooves are distributed at equal intervals in the jacking head in the annular direction.
4. The constant-resistance anchor cable withdrawal device according to claim 1, wherein: the outer contour of the clamping device is matched with the clamping groove of the jacking head, and the front end of the jacking head is connected with the clamping device in a detachable connection mode including threaded connection and hook connection.
5. A design method of the constant-resistance anchor cable withdrawal device of claim 1, characterized by comprising the following steps:
s1: acquiring the size of a lockset used by a constant-resistance anchor cable to be withdrawn; the dimensions include: outer diameter of anchor ringAMaximum outer diameter of the clamping pieceaThe included angle between the outer surface of the clamping piece and the horizontal direction when the anchor cable normally worksβAnd the exposed length of the clamping pieceS；
S2: determining ram wall thicknesshAnd circumferential distance between the outer wall of the clamping groovel(ii) a The top pressure head contacts the anchor ring only at the front end, is not in contact with the constant-resistance anchor cable sleeve and the clamping piece, and the outer diameter of the top pressure head is equal to the outer diameter of the anchor ring, so the wall thickness is thickhThe geometrical relationship is satisfied: 0 < (R) >h≤(A－a) 2; the number of the clamping grooves arranged in the circumferential direction of the top pressure head is defined asnThe arc length of the outer wall of a single clamping groove ismAnd circumferential spacing of slotslThe geometrical relationship is satisfied:l=(πA－m×n)/n（1）；
s3: determining a reasonable radius of a unidirectional rotating wheelRAnd angle of adjacent bladesθ(ii) a Defining the minimum horizontal distance between the inner wall of the top pressure head and the clamping sheet as an equal;
theoretical radius of unidirectional runnerRThe geometrical relationship is satisfied: Δ <R＜hIn order to ensure that the axis of the unidirectional rotating wheel is positioned near the middle diameter of the wall thickness of the top pressure head cylinder, the radius of the rotating wheel is optimized on the theoretical basisRAccording to the geometric relationship, the value range is reduced as follows: (h+∆)/2≤R≤(h+∆+S/tanβ)/2（2）；
After the specific radius of the runner is determined, the included angle between adjacent bladesθSatisfies the geometrical relationship of the formula (3) and the formula (4),
R+Rcos(θ 1/2)=h+∆（3）
θ 1/2＋β－θ 2/2=π/2（4）
in the formula (I), the compound is shown in the specification,θ 1、θ 2respectively has a radius ofRAngle between adjacent bladesθTo obtain the included angle of adjacent blades at the determined radius of the runnerθHas a value range ofθ 2≤θ＜θ 1。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111207900.XA CN114562307A (en) | 2021-10-18 | 2021-10-18 | Constant-resistance anchor cable withdrawal device and design method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111207900.XA CN114562307A (en) | 2021-10-18 | 2021-10-18 | Constant-resistance anchor cable withdrawal device and design method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140227042A1 (en) * | 2011-06-13 | 2014-08-14 | China University Of Mining & Technology (Beijing) | Constant-resistance and large deformation anchor cable and constant-resistance device |
| CN203822341U (en) * | 2013-11-15 | 2014-09-10 | 徐州恒佳机械科技有限公司 | Anchor hauling-off device |
| CN205422759U (en) * | 2016-03-15 | 2016-08-03 | 中国矿业大学 | Anchor rope that anchor ring was moved back to crisscross knot formula mutually of pre -installation moves back anchor device |
| WO2016150212A1 (en) * | 2015-03-25 | 2016-09-29 | 中国矿业大学 | Impact-type anchor cable anchor-unhooking apparatus having preinstalled anchor-unhooking rings and method therefor |
| CN207960648U (en) * | 2018-03-16 | 2018-10-12 | 霍州煤电集团吕梁山煤电有限公司方山店坪煤矿 | A kind of constant-resistance anchor cable moves back anchor device |
| CN208633852U (en) * | 2018-08-17 | 2019-03-22 | 焦作煤业集团赵固（新乡）能源有限责任公司 | A kind of interior step anchor wire withdrawing device |
| CN210033486U (en) * | 2019-05-09 | 2020-02-07 | 河南理工大学 | Anchor withdrawing device for roadway anchor cable support |
| CN213235097U (en) * | 2020-09-30 | 2021-05-18 | 兖州煤业股份有限公司 | Anchor rope construction specialized tool |
| CN213540441U (en) * | 2020-11-13 | 2021-06-25 | 华亭煤业集团有限责任公司 | Anchor withdrawing device based on tensioning jack |
-
2021
- 2021-10-18 CN CN202111207900.XA patent/CN114562307A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140227042A1 (en) * | 2011-06-13 | 2014-08-14 | China University Of Mining & Technology (Beijing) | Constant-resistance and large deformation anchor cable and constant-resistance device |
| CN203822341U (en) * | 2013-11-15 | 2014-09-10 | 徐州恒佳机械科技有限公司 | Anchor hauling-off device |
| WO2016150212A1 (en) * | 2015-03-25 | 2016-09-29 | 中国矿业大学 | Impact-type anchor cable anchor-unhooking apparatus having preinstalled anchor-unhooking rings and method therefor |
| CN205422759U (en) * | 2016-03-15 | 2016-08-03 | 中国矿业大学 | Anchor rope that anchor ring was moved back to crisscross knot formula mutually of pre -installation moves back anchor device |
| CN207960648U (en) * | 2018-03-16 | 2018-10-12 | 霍州煤电集团吕梁山煤电有限公司方山店坪煤矿 | A kind of constant-resistance anchor cable moves back anchor device |
| CN208633852U (en) * | 2018-08-17 | 2019-03-22 | 焦作煤业集团赵固（新乡）能源有限责任公司 | A kind of interior step anchor wire withdrawing device |
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| CN213540441U (en) * | 2020-11-13 | 2021-06-25 | 华亭煤业集团有限责任公司 | Anchor withdrawing device based on tensioning jack |
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| 张日林;李少华;张建荣;: "退锚索机在综放工作面的应用", 机械管理开发, no. 03, 15 June 2008 (2008-06-15) * |
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Application publication date: 20220531 |