CN113279794B - Anchor rope moves back anchor device - Google Patents
Anchor rope moves back anchor device Download PDFInfo
- Publication number
- CN113279794B CN113279794B CN202110720509.3A CN202110720509A CN113279794B CN 113279794 B CN113279794 B CN 113279794B CN 202110720509 A CN202110720509 A CN 202110720509A CN 113279794 B CN113279794 B CN 113279794B
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- anchor
- block
- tail
- guide rail
- piston rod
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- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 14
- 239000011435 rock Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The utility model provides an anchor rope moves back anchor device, includes the stopper tail and the grabbing mechanism of fixing at the stopper tail, and grabbing mechanism passes through the hydraulic cylinder drive slip and sets up the grabbing device on linear guide rail and snatch the stopper tail, and the piston rod tip of hydraulic cylinder is fixed with the circular cone platform, and the circular cone platform is used for pushing two grip blocks of grabbing device along opposite direction slip in the slider along with the in-process that the piston rod stretches out in order to snatch the stopper tail, is equipped with the blind hole on the circular cone platform, is equipped with on the grip block in the in-process that the circular cone platform withdraws can with the through-hole that the blind hole is just right, through-hole and blind hole are used for inserting the mounting in order to make circular cone platform drive the grip block and lift the stopper from the anchor cup at circular cone platform in-process that the circular cone platform withdraws. The anchor withdrawing device is applied to anchor withdrawing operation without manually removing an anchor plug, so that the safety of the anchor withdrawing operation is improved, the whole anchor withdrawing process is quick and convenient, the operation can be completed by a single person, the labor intensity is reduced, and the anchor withdrawing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of coal mine anchor cable support, in particular to an anchor cable withdrawing device.
Background
Most of coal in China adopts underground mining, a large number of tunnels are required to be tunneled underground, the stability and maintenance of surrounding rocks of the tunnels are directly related to the safety production and economic benefits of mines, and the anchor cable support can obviously improve the stress state of the surrounding rocks and the self-supporting capacity of the surrounding rocks.
Because the anchor rope all distributes the roof in the tunnel, at present, adopt to take the jack to the tunnel top and link to each other with the steel strand wires when moving back the anchor, but, in moving back anchor pressurization in-process, need the manual work to take off the anchor stopper from the anchor cup, move back anchor work and have certain potential safety hazard, in addition, in whole moving back anchor in-process, because the actual environment reason in tunnel, the manual work takes off the anchor stopper from the anchor cup and need many people to accomplish in coordination to move back anchor operation, intensity of labour is big, moves back anchor inefficiency.
Disclosure of Invention
The invention aims to provide an anchor rope withdrawing device which is safe and reliable when applied to anchor rope withdrawing operation, reduces the labor intensity of withdrawing the anchor and improves the anchor withdrawing efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an anchor cable withdrawing device comprises a plug tail fixed at the tail part of an anchor plug along the radial direction of the anchor plug and a grabbing mechanism for grabbing the plug tail and detaching the anchor plug from an anchor cup;
the grabbing mechanism comprises a hydraulic cylinder, a linear guide rail which is parallel to a piston rod of the hydraulic cylinder and is fixed on the hydraulic cylinder, and a grabbing device which is arranged on the linear guide rail in a sliding manner;
the grabbing device comprises a sliding block which is slidably arranged on the linear guide rail, two clamping blocks are relatively slidably arranged in the sliding block perpendicular to the moving direction of the sliding block, and protrusions for grabbing the plug tail are arranged on opposite surfaces of the two clamping blocks;
the end part of a piston rod of the hydraulic cylinder is fixedly provided with a cone frustum, the cone frustum is used for pushing two clamping blocks to slide in opposite directions in a sliding block along with the extension of the piston rod so that the distance between two bulges is larger than the diameter of a stopper tail, a fixed block far away from the clamping blocks is fixedly arranged on the sliding block along the sliding direction of the clamping blocks, an elastic piece is arranged between the clamping blocks and the fixed block, and the elastic piece is used for driving the two clamping blocks to slide relatively in the sliding block along with the retraction of the piston rod so that the distance between the two bulges is smaller than the diameter of the stopper tail;
the cone frustum is provided with a blind hole, the clamping block is provided with a through hole which can be opposite to the blind hole in the retracting process of the cone frustum, and the through hole and the blind hole are used for inserting a fixing piece so that the cone frustum drives the clamping block to detach the anchor plug from the anchor cup in the retracting process of the cone frustum.
Further, the hydraulic cylinder comprises a cylinder body, a piston which divides the cylinder body into a first liquid cavity and a second liquid cavity is arranged in the cylinder body, a first connector with a one-way valve is arranged on the first liquid cavity, a second connector with a one-way valve is arranged on the second liquid cavity, and the piston rod is fixed on the piston and penetrates through the cylinder body to extend outwards.
Further, the elastic pieces are provided with a plurality of elastic pieces and are uniformly distributed between the clamping blocks and the fixing blocks.
Further, the elastic piece is a spring.
Further, the linear guide rail comprises a first guide rail and a second guide rail which are oppositely arranged on two sides of the piston rod, the sliding blocks comprise a first sliding block which is slidably arranged on the first guide rail and a second sliding block which is slidably arranged on the second guide rail, and the two clamping blocks are slidably arranged in the first sliding block and the second sliding block respectively.
Further, the protrusion is located at one end of the clamping block away from the hydraulic cylinder.
Further, a lock nut is arranged on the sliding block.
The invention has the beneficial effects that:
according to the invention, the clamping blocks of the grabbing device are driven by the hydraulic cylinders to grab the tail of the anchor plug, and the cone frustum is arranged on the piston rod, so that the distance between the clamping blocks is adjusted in the telescopic process of the piston rod, the protrusions on the clamping blocks are clamped at the tail of the anchor plug to drive the anchor plug to separate from the anchor cup, the anchor plug is not required to be manually taken down in the whole process, the safety of anchor withdrawing operation is improved, the whole anchor withdrawing process is rapid and convenient, the operation can be completed by a single person, the labor intensity is reduced, and the anchor withdrawing efficiency is improved.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic top view of the linear guide and the gripping device.
The marks in the figure: 1. hydraulic cylinder, 101, end cover, 102, first joint, 103, cylinder body, 104, second joint, 105, piston rod, 106, first liquid chamber, 107, piston, 108, second liquid chamber, 109, baffle, 2, mounting, 3, linear guide, 301, first guide, 302, second guide, 4, cone frustum, 5, slider, 501, lock nut, 6, mounting, 7, clamping block, 701, protrusion, 8, elastic element, 9, fixing block, 10, anchor plug, 1001, plug tail, 11, anchor cup, 12, tray, 13, anchor cable.
Detailed Description
The invention will be further described with reference to the drawings and detailed description, wherein, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 2, an anchor cable withdrawal device includes a tail 1001 radially fixed to the tail of an anchor plug 10 along the anchor plug 10, and a gripping mechanism for gripping the tail 1001 to detach the anchor plug 10 from an anchor cup 11, and in specific implementation, the tail 1001 may be a cylinder coaxially disposed at the tail of the anchor plug 10 and having a diameter larger than that of the anchor plug 10, or may be an annular body sleeved on an outer ring of the tail of the anchor plug 10, that is, only a structure that the anchor plug 10 has a protrusion relative to a main body of the anchor plug 10 in a radial direction is required.
The grabbing mechanism comprises a hydraulic cylinder 1, a linear guide rail 3 which is parallel to a piston rod 105 of the hydraulic cylinder 1 and is fixed on the hydraulic cylinder 1, and a grabbing device which is arranged on the linear guide rail 3 in a sliding manner, wherein the hydraulic cylinder 1 is a power unit and can provide power for grabbing an anchor plug 10 and detaching the anchor plug from an anchor cup 11, and the linear guide rail 3 provides a support for the grabbing device, wherein the support can move along the telescopic direction of the piston rod 105 of the hydraulic cylinder 1.
The grabbing device comprises a sliding block 5 which is slidably mounted on a linear guide rail 3, two clamping blocks 7 are slidably mounted in the sliding block 5 in a direction perpendicular to the moving direction of the sliding block 5, protrusions 701 for grabbing the plug tail 1001 are arranged on opposite faces of the two clamping blocks 7, namely the protrusions 701 can be clamped on an anchor plug 10 to form mutual limiting with the plug tail 1001 through the relative sliding of the two clamping blocks 7, and when the grabbing device is applied specifically, the protrusions 701 can be arranged at one end, far away from the hydraulic cylinder 1, of the clamping blocks 7, so that the plug tail 1001 is convenient to grab, and meanwhile more movable space is reserved for the conical table 4.
The end part of the piston rod 105 of the hydraulic cylinder 1 is fixed with a cone table 4, the cone table 4 is used for pushing two clamping blocks 7 to slide in opposite directions in the sliding block 5 along with the extension of the piston rod 105 so that the distance between the two protrusions 701 is larger than the diameter of the plug tail 1001, when the hydraulic cylinder is implemented, the diameter of the end part of the cone table 4, which is used for pushing the two clamping blocks 7 to slide in opposite directions in the sliding block 5, can be small enough, so that the cone table 4 can be conveniently extended into the middle of the two clamping blocks 7, the cone table 4 can also be directly arranged between the two clamping blocks 7, namely, the cone table 4 is always arranged between the two clamping blocks 7, when the cone table 4 moves along with the piston rod 105, the distance between the two clamping blocks 7 is adjusted through the conical surface of the cone table 4, and when the hydraulic cylinder is implemented, the sliding block 5 can be provided with a locking nut 501, when the hydraulic cylinder is implemented, the hydraulic cylinder is used, the conical table 4 can be conveniently pushed by pushing the two clamping blocks 7 to slide in opposite directions in the sliding block 5 along with the directions, and then the locking nut 501 can be opened after the conical table 4 is slid in place.
The fixed block 9 far away from the fixed block 7 is fixed on the sliding block 5 along the sliding direction of the fixed block 7, the elastic piece 8 is arranged between the fixed block 9 and the fixed block 7, the elastic piece 8 is used for driving the two fixed blocks 7 to slide relatively in the sliding block 5 in the process that the cone frustum 4 retracts along with the piston rod 105, so that the distance between the two protrusions 701 is smaller than the diameter of the stopper tail 1001, the two fixed blocks 7 can clamp the anchor plug 10, and when the sliding block 5 retracts away from the anchor plug 10, the stopper tail 1001 and the fixed block 7 generate interaction force due to limit, and in specific implementation, the elastic piece 8 can be provided with a plurality of elastic pieces and is uniformly distributed between the fixed block 9, so that the fixed block 7 can be pushed to slide in the sliding block 5 smoothly, and the elastic piece 8 can be a spring.
The utility model discloses a fixing device for the anchor plug 10 of the anchor cup 11, including the cone frustum 4, be equipped with the blind hole on the cone frustum 4, be equipped with on the grip block 7 at the in-process that the cone frustum 4 was retracted can with the through-hole that the blind hole just faces, through-hole and blind hole are used for inserting mounting 6 in order to make cone frustum 4 drive grip block 7 lift anchor plug 10 from anchor cup 11 at the in-process that the cone frustum 4 was retracted, and during the concrete implementation, mounting 6 can be the screw rod, and blind hole and through-hole can set up two sets of, and set up with respect to piston rod 105 symmetry, after mounting 6 inserts through-hole and blind hole, can make the fixation between grip block 7 and the cone frustum 4 more firm, and make cone frustum 4 drive grip block 7 lift anchor plug 10's process more stable from anchor cup 11.
The piston rod 105 is driven to extend through the hydraulic cylinder 1, the piston rod 105 drives the cone table 4 to expand the distance between the two clamping blocks 7, meanwhile, the elastic piece 8 is compressed between the clamping blocks 7 and the fixed block 9, the grabbing device moves along with the sliding block 5 to the position that the protrusion 701 extends through the plug tail 1001, the anchor plug 10 extends between the two clamping blocks 7, then the hydraulic cylinder 1 drives the piston rod 105 to retract, the clamping blocks 7 slide relatively under the action of the elastic piece 8, the distance between the two clamping blocks 7 is contracted to the position that the protrusion 701 can enable the plug tail 1001 to move and limit with the protrusion 701 of the clamping block 7 in the moving direction of the piston rod 105, the protrusion 701 finally falls on the anchor plug 10 to be in contact with the main body part of the anchor plug 10, the fixed piece 6 is inserted into a pin hole of the cone table 4 through a through hole in the retracting process of the piston rod 105, the clamping block 7 is fixedly connected with the cone table 4, the hydraulic cylinder 1 continues to drive the piston rod 105 to retract, the protrusion 701 drives the anchor plug 10 to separate from the anchor cup 11, the anchor cable 13 can be rapidly removed, the anchor cable 12 and the anchor cable 13 can be rapidly withdrawn, the whole anchor plug is completely can be manually pulled down, the anchor cable is completely, the whole anchor pulling operation can be rapidly carried out, the anchor pulling efficiency is also can be rapidly achieved, the anchor pulling operation is conveniently and the anchor pulling down is convenient, the anchor pulling operation can be conveniently and fast is improved.
In a specific implementation, the hydraulic cylinder 1 includes a cylinder body 103, an end cover 101 is disposed at one end of the cylinder body 103, a baffle 109 is disposed at the other end of the cylinder body 103, a piston 107 dividing the cylinder body 103 into a first liquid cavity 106 and a second liquid cavity 108 is disposed in the cylinder body 103, a first joint 102 with a check valve is disposed on the first liquid cavity 106, a second joint 104 with a check valve is disposed on the second liquid cavity 108, the piston rod 105 is fixed on the piston 107, and extends out of the cylinder body 103 through the baffle 109.
Further, the linear guide rail 3 includes a first guide rail 301 and a second guide rail 302 that are oppositely disposed at two sides of the piston rod 105, where the first guide rail 301 and the second guide rail 302 may be a single rail or a double rail that is disposed in parallel, the slide block 5 includes a first slide block slidably mounted on the first guide rail 301 and a second slide block slidably mounted on the second guide rail 302, and the two clamping blocks 7 are slidably mounted in the first slide block and the second slide block, respectively.
The linear guide rail 3 may be fixedly connected to the hydraulic cylinder 1 through the fixing member 2, the fixing member 2 may be integrally manufactured with the linear guide rail 3, the fixing member 2 may be fixedly mounted on the cylinder 103 of the hydraulic cylinder 1 through the bolt assembly, and in addition, it should be noted that, in use, the elastic member 8 disposed between the fixing block 9 and the clamping block 7 may be adjusted to provide an initial spacing between the two clamping blocks 7, and when the cone frustum 4 is not always disposed between the two clamping blocks 7, the spacing should be satisfied so that the small diameter end of the cone frustum 4 may enter, and the spacing should be smaller than the diameter of the plug tail 1001, so that when the cone frustum 4 is retracted along with the piston rod 105, the two clamping blocks 7 may effectively grasp the plug tail 1001 when the cone frustum 7 is retracted.
It should be noted that the above embodiments are only for illustrating the present invention, but the present invention is not limited to the above embodiments, and any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention falls within the protection scope of the present invention.
Claims (7)
1. The anchor rope withdrawing device is characterized by comprising a stopper tail (1001) and a grabbing mechanism, wherein the stopper tail (1001) is radially fixed at the tail of the anchor stopper (10) along the anchor stopper (10), and the grabbing mechanism is used for grabbing the stopper tail (1001) and detaching the anchor stopper (10) from an anchor cup (11);
the grabbing mechanism comprises a hydraulic cylinder (1), a linear guide rail (3) which is parallel to a piston rod (105) of the hydraulic cylinder (1) and is fixed on the hydraulic cylinder (1), and a grabbing device which is arranged on the linear guide rail (3) in a sliding manner;
the grabbing device comprises a sliding block (5) which is slidably arranged on the linear guide rail (3), two clamping blocks (7) are relatively slidably arranged in the sliding block (5) perpendicular to the moving direction of the sliding block (5), and protrusions (701) for grabbing the plug tail (1001) are arranged on opposite surfaces of the two clamping blocks (7);
the end part of a piston rod (105) of the hydraulic cylinder (1) is fixedly provided with a cone table (4), the cone table (4) is used for pushing two clamping blocks (7) to slide in opposite directions in a sliding block (5) along with the extension of the piston rod (105) so that the distance between the two protrusions (701) is larger than the diameter of a plug tail (1001), a fixed block (9) far away from the clamping block (7) is fixedly arranged on the sliding block (5) along the sliding direction of the clamping block (7), an elastic piece (8) is arranged between the clamping block (7) and the fixed block (9), and the elastic piece (8) is used for driving the two clamping blocks (7) to slide relatively in the sliding block (5) along with the retraction of the piston rod (105) so that the distance between the two protrusions (701) is smaller than the diameter of the plug tail (1001);
the cone bench (4) is provided with a blind hole, the clamping block (7) is provided with a through hole which can be opposite to the blind hole in the retracting process of the cone bench (4), and the through hole and the blind hole are used for inserting the fixing piece (6) so that the cone bench (4) drives the clamping block (7) to detach the anchor plug (10) from the anchor cup (11) in the retracting process of the cone bench (4).
2. The anchor cable withdrawing device according to claim 1, wherein the hydraulic cylinder (1) comprises a cylinder body (103), a piston (107) dividing the cylinder body (103) into a first liquid cavity (106) and a second liquid cavity (108) is arranged in the cylinder body (103), a first connector (102) with a one-way valve is arranged on the first liquid cavity (106), a second connector (104) with a one-way valve is arranged on the second liquid cavity (108), and the piston rod (105) is fixed on the piston (107) and extends outwards through the cylinder body (103).
3. An anchor line withdrawing device according to claim 1, wherein a plurality of elastic members (8) are provided and are uniformly distributed between the clamping blocks (7) and the fixing blocks (9).
4. A cable withdrawal device according to claim 3, characterized in that the elastic element (8) is a spring.
5. An anchor line withdrawing device according to claim 1, wherein the linear guide rail (3) comprises a first guide rail (301) and a second guide rail (302) which are oppositely arranged at two sides of the piston rod (105), the slide block (5) comprises a first slide block which is slidably arranged on the first guide rail (301) and a second slide block which is slidably arranged on the second guide rail (302), and the two clamping blocks (7) are slidably arranged in the first slide block and the second slide block respectively.
6. An anchor line withdrawal device according to claim 1, characterized in that the projection (701) is located at the end of the clamping block (7) remote from the hydraulic cylinder (1).
7. An anchor line withdrawal device according to claim 1, characterized in that the slide (5) is provided with a lock nut (501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110720509.3A CN113279794B (en) | 2021-06-28 | 2021-06-28 | Anchor rope moves back anchor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110720509.3A CN113279794B (en) | 2021-06-28 | 2021-06-28 | Anchor rope moves back anchor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113279794A CN113279794A (en) | 2021-08-20 |
| CN113279794B true CN113279794B (en) | 2023-09-12 |
Family
ID=77285820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110720509.3A Active CN113279794B (en) | 2021-06-28 | 2021-06-28 | Anchor rope moves back anchor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113279794B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR439047A (en) * | 1911-01-19 | 1912-06-04 | Frederic William Russell | Magazine device for driving screws, which can be attached to an ordinary drill or drill |
| CN2594244Y (en) * | 2002-12-29 | 2003-12-24 | 柳州欧维姆机械有限责任公司 | Front locking tension jack |
| WO2013033760A1 (en) * | 2011-09-05 | 2013-03-14 | Dywidag-Systems International Pty Limited | A tensionable cable bolt assembly |
| CN204714436U (en) * | 2015-06-29 | 2015-10-21 | 北京巧力科技有限责任公司 | A kind of anchor cable reclaims jack |
| CN105332727A (en) * | 2015-10-28 | 2016-02-17 | 天地科技股份有限公司 | Anchor cable withdrawal device |
| CN207131665U (en) * | 2017-07-24 | 2018-03-23 | 宁波亚德客自动化工业有限公司 | One kind holds cylinder structure tightly |
| CN208073527U (en) * | 2018-04-23 | 2018-11-09 | 呼伦贝尔山金矿业有限公司 | A kind of mining bolt mounting device |
| CN210164489U (en) * | 2019-03-25 | 2020-03-20 | 泰州市沿江电子机械制造有限公司 | Anchor cable tensioning machine tool for coal mine |
| CN213418521U (en) * | 2020-09-28 | 2021-06-11 | 常州真友矿山设备有限公司 | Anchor cable stretching machine |
-
2021
- 2021-06-28 CN CN202110720509.3A patent/CN113279794B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR439047A (en) * | 1911-01-19 | 1912-06-04 | Frederic William Russell | Magazine device for driving screws, which can be attached to an ordinary drill or drill |
| CN2594244Y (en) * | 2002-12-29 | 2003-12-24 | 柳州欧维姆机械有限责任公司 | Front locking tension jack |
| WO2013033760A1 (en) * | 2011-09-05 | 2013-03-14 | Dywidag-Systems International Pty Limited | A tensionable cable bolt assembly |
| CN204714436U (en) * | 2015-06-29 | 2015-10-21 | 北京巧力科技有限责任公司 | A kind of anchor cable reclaims jack |
| CN105332727A (en) * | 2015-10-28 | 2016-02-17 | 天地科技股份有限公司 | Anchor cable withdrawal device |
| CN207131665U (en) * | 2017-07-24 | 2018-03-23 | 宁波亚德客自动化工业有限公司 | One kind holds cylinder structure tightly |
| CN208073527U (en) * | 2018-04-23 | 2018-11-09 | 呼伦贝尔山金矿业有限公司 | A kind of mining bolt mounting device |
| CN210164489U (en) * | 2019-03-25 | 2020-03-20 | 泰州市沿江电子机械制造有限公司 | Anchor cable tensioning machine tool for coal mine |
| CN213418521U (en) * | 2020-09-28 | 2021-06-11 | 常州真友矿山设备有限公司 | Anchor cable stretching machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113279794A (en) | 2021-08-20 |
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