CN212428611U - Engineering drilling machine - Google Patents
Engineering drilling machine Download PDFInfo
- Publication number
- CN212428611U CN212428611U CN202021011243.2U CN202021011243U CN212428611U CN 212428611 U CN212428611 U CN 212428611U CN 202021011243 U CN202021011243 U CN 202021011243U CN 212428611 U CN212428611 U CN 212428611U
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- frame
- crane
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- 238000005553 drilling Methods 0.000 title claims abstract description 43
- 238000003860 storage Methods 0.000 claims description 18
- 238000005728 strengthening Methods 0.000 claims description 8
- 230000001174 ascending effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000004576 sand Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 241000397426 Centroberyx lineatus Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model relates to an engineering driller relates to drilling equipment's technical field, including frame, track running gear, rig platform and strutting arrangement, strutting arrangement includes first crane, second crane, two first support columns, two second support columns, telescopic link and drive assembly, and first crane and second crane are located the same ascending both ends of frame respectively, and two first support columns are located the ascending both ends of first crane length direction respectively, and two second support columns are located the ascending both ends of second crane length direction. The utility model discloses carry out the probing during operation, move towards ground through the first crane of drive assembly drive and second crane to the effect through first support column and second support column is realized supporting the rig platform, and the telescopic link that the slope set up simultaneously realizes further firm to the both sides of rig platform, thereby has reduced the skew distance of rig, has reduced the influence to the probing, has improved the efficiency of probing.
Description
Technical Field
The utility model belongs to the technical field of drilling equipment's technique and specifically relates to an engineering driller is related to.
Background
The drilling machine is a mechanical device which drives a drilling tool to drill underground to obtain real geological data in exploration or mineral resource (including solid ore, liquid ore, gas ore and the like) development. Also known as a drilling rig. The main function is to drive the drilling tool to break the rock at the bottom of the hole and to put in or put out the drilling tool in the hole. The method can be used for drilling rock cores, ore cores, rock debris, gas samples, liquid samples and the like so as to find underground geology, mineral resources and other conditions.
At present, a patent with publication number CN205840774U discloses a crawler-type oil rig, which comprises a running mechanism and a drilling and production system arranged on the running mechanism, wherein the running mechanism comprises a cab, a frame and a chassis, and the chassis adopts a crawler-type chassis. The utility model discloses a through adopting crawler-type chassis, comparing vehicle chassis, more can adapt to the travel of complicated road conditions such as mire, desert, and can effectively reduce whole car height, reduce whole car size, make whole car arrange compacter.
The technical scheme has the following defects: when the drilling machine works, larger vibration force can be generated, so that the whole frame is vibrated greatly, the whole drilling machine is deviated to a certain extent, especially in the environment with complicated geology, the deviation distance of the drilling machine is increased, and the drilling efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an engineering driller supports the rig platform through first support column and second support column to stabilize rig platform both sides through the telescopic link, reduced the skew distance of rig, thereby reduced the influence to the probing work, improved the efficiency of probing work.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
an engineering drilling machine comprises a machine frame, a crawler traveling mechanism arranged below the machine frame, a drilling machine platform arranged on the machine frame, and a supporting device arranged around the machine frame and used for supporting the drilling machine platform, wherein the supporting device comprises a first lifting frame arranged on the machine frame, a second lifting frame arranged on the machine frame, two first supporting columns arranged on the first lifting frame, two second supporting columns arranged on the second lifting frame, telescopic rods arranged on two sides of the machine frame and in an inclined arrangement, and a driving assembly arranged on the machine frame and used for driving the first lifting frame and the second lifting frame to lift, the first lifting frame and the second lifting frame are respectively positioned at two ends of the machine frame in the same direction, the two first supporting columns are respectively positioned at two ends of the first lifting frame in the length direction, the two second support columns are positioned at two ends of the second lifting frame in the length direction.
Through adopting above-mentioned technical scheme, when carrying out the boring work, move towards ground direction through first crane of drive assembly drive and second crane, make two first support columns and second support column can contact with ground, and realize supporting the rig platform through the effect of first support column and second support column, thereby realize the firm of rig platform, the telescopic link that the slope set up simultaneously realizes further firm to the both sides of rig platform, thereby the offset distance of rig has been reduced, the influence to the boring work has been reduced, the efficiency of boring work has been improved. In addition, the telescopic link that the slope set up can also play the effect of preventing turning on one's side.
The utility model discloses can further configure to in a preferred example, first support column with be provided with the strengthening rib between the first crane, the second support column with be provided with the strengthening rib between the second crane.
Through adopting above-mentioned technical scheme, strengthen being connected between first support column and the first crane through the strengthening rib, second support column and second crane are also connected through the strengthening rib equally, have increased the support intensity of first support column and second support column to a certain extent for the support to the rig platform is more firm.
The utility model discloses can further configure to in a preferred example, first support column, second support column, telescopic link bottom all are provided with the location awl.
By adopting the technical scheme, the positioning cone can be inserted into the ground to provide the limiting on the horizontal direction of the drilling machine, so that the probability of slippage of the drilling machine in the drilling work is reduced.
The utility model discloses can further configure to in a preferred example, first crane and the equal vertical sliding of second crane are installed in the frame, drive assembly is including setting up first hydro-cylinder and second hydro-cylinder in the frame, just the piston rod of first hydro-cylinder with first crane links to each other, the piston rod of second hydro-cylinder with the second crane links to each other, just the piston rod of first hydro-cylinder and second hydro-cylinder all follows vertical direction and stretches out and draws back.
Through adopting above-mentioned technical scheme, the vertical removal of first crane is controlled to first hydro-cylinder, and the vertical removal of second crane is controlled to the second hydro-cylinder, and when rig during operation, first crane and the motion of second crane towards ground for first support column and second support column can support the rig platform. When the drilling machine needs to advance, the first lifting frame and the second lifting frame are driven to move away from the ground, so that the first supporting column and the second supporting column are in contact with the ground, and the drilling machine can advance conveniently.
The utility model discloses can further configure into in a preferred example, the fixed first stopper that is provided with on the first crane, just be provided with in the frame with first stopper slides the first spacing groove of complex, the fixed second stopper that is provided with on the second crane, just be provided with in the frame with the second stopper slides the complex second spacing groove.
Through adopting above-mentioned technical scheme, first crane vertically slides in the frame through the cooperation of first stopper and first spacing groove, and the second crane vertically slides in the frame through the cooperation of second stopper and second spacing groove for first crane and the more stable slip of second crane.
The utility model discloses can further configure to in a preferred example, the transversal swallow-tail form of personally submitting of first stopper and second stopper.
Through adopting above-mentioned technical scheme, the design of dovetail enables that first crane and second crane are more stable vertically to slide in the frame, and is difficult for breaking away from with the spacing groove at the in-process that slides.
The utility model discloses can further configure to in a preferred example, be provided with the control chamber on the rig platform, be provided with the step on the rig platform, just it is provided with the walking board to rotate in the frame, just the walking board is close to ground one side and rotates and be provided with the backup pad.
Through adopting above-mentioned technical scheme, because the frame generally liftoff has certain distance, the staff goes to the control chamber not very convenient, through the carriage plate in the upset frame, makes carriage plate one end conflict ground, provides stable support for the carriage plate under the effect of backup pad simultaneously for the staff can walk from the carriage plate, cooperates the effect of step again, can get into in the control chamber better.
The utility model discloses can further configure to in a preferred example, be provided with the apotheca in the frame, be provided with in the apotheca and be used for storing the cavity of walking board, just the walking board with the cavity slides and connects, cavity one end has the opening, the cavity is close to the fixed connecting rod that is provided with of opening one end, be provided with connecting portion on the walking board, and work as the walking board is followed when pulling out in the cavity, connecting portion with the connecting rod rotates to be connected.
Through adopting above-mentioned technical scheme, when the rig need advance, through rotating the running board, in the cavity with the running board propelling movement apotheca to the realization is to the storage of running board, and when needs use the running board, only need pull out the running board from the cavity, lets connecting portion and connecting rod cooperation, can rotate the running board, again with running board and backup pad support can on ground. Has the advantages of convenient operation and simple structure.
The utility model discloses can further configure to in a preferred example, be provided with a plurality of cell bodies on the running board.
Through adopting above-mentioned technical scheme, increase the frictional force on running board surface through a plurality of cell bodies for the staff can be better walk on the running board.
To sum up, the utility model discloses a following at least one useful technological effect:
1. when drilling work is carried out, the first lifting frame and the second lifting frame are driven by the driving assembly to move towards the ground direction, and the drilling machine platform is supported under the action of the first supporting column and the second supporting column, so that the drilling machine platform is stabilized, and meanwhile, the two sides of the drilling machine platform are further stabilized by the obliquely arranged telescopic rods, so that the offset distance of the drilling machine is reduced, the influence on the drilling work is reduced, and the efficiency of the drilling work is improved;
2. when the rig need advance, through rotating the walking board, in pushing the walking board into the cavity of apotheca to the realization is to the storage of walking board, and when needs used the walking board, only need pull out the walking board from the cavity, let connecting portion and connecting rod cooperation, can rotate the walking board, again with walking board and backup pad support on ground can, have convenient operation, simple structure's advantage.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is an exploded view of a second crane of the present invention;
FIG. 3 is an exploded view of the telescopic tube of the present invention;
fig. 4 is an exploded view of the storage chamber of the present invention.
Reference numerals: 1. a frame; 11. a crawler belt traveling structure; 12. a rig floor; 121. an operation chamber; 122. a step; 13. a support device; 131. a first lifting frame; 1311. a first stopper; 132. a second lifting frame; 1321. a second limiting block; 133. a first support column; 134. a second support column; 135. a telescopic rod; 1351. an inner rod; 1352. an outer rod; 1361. a first cylinder; 1362. a second cylinder; 2. a second limit groove; 3. reinforcing ribs; 4. positioning a cone; 5. a mounting cavity; 51. a chute; 6. a slider; 7. a driving cylinder; 8. a storage chamber; 81. a sand discharge port; 811. a slide rail; 82. closing the plate; 83. an inclined plate; 84. a chamber; 85. a walking board; 851. a connecting portion; 8511. a groove; 852. a trough body; 853. a support plate; 86. a connecting rod; 87. a cover plate; 871. a clamping block; 88. a card slot; 9. a connecting assembly; 91. a bump; 92. fixing the bolt; 10. mounting a plate; 101. and (4) mounting the groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an engineering driller comprises a frame 1, a crawler walking structure, a driller platform 12 and a supporting device 13. Wherein, the crawler traveling mechanism is fixed on the bottom surface of the frame 1, and the crawler traveling mechanism is the prior art and is not described herein again. The drilling platform 12 is fixed on the frame 1, and an operation chamber 121 is fixed on the upper surface of the drilling platform 12. In addition, the drilling platform 12 is further provided with steps 122, and the steps 122 are sequentially arranged from bottom to top in an ascending manner.
Referring to fig. 1 and 2, the supporting device 13 is disposed around the frame 1, and includes a first lifting frame 131, a second lifting frame 132, two first supporting columns 133, two second supporting columns 134, two telescopic rods 135, and a driving assembly for driving the first lifting frame 131 and the second lifting frame 132 to lift. The first lifting frame 131 and the second lifting frame 132 are respectively positioned at two opposite sides of the rack 1, a first limiting block 1311 is fixed on the first lifting frame 131, and a first limiting groove matched with the first limiting block 1311 in a sliding manner is formed in the rack 1; the second crane 132 is fixed with a second limiting block 1321, and the frame 1 is provided with a second limiting groove 2 matched with the second limiting block 1321 in a sliding manner. First spacing groove and second spacing groove 2 all are vertical setting, and set up in the relative both sides of frame 1 to the cross section of first spacing groove and second spacing groove 2 all is the dovetail. Thereby, the first crane 131 and the second crane 132 are vertically slidably installed on the frame 1.
The driving assembly comprises a first oil cylinder 1361 and a second oil cylinder 1362, the cylinder bodies of the first oil cylinder 1361 and the second oil cylinder 1362 are fixed on the drilling machine platform 12, and the first oil cylinder 1361 and the second oil cylinder 1362 are respectively positioned at the positions corresponding to the first lifting frame 131 and the second lifting frame 132. Wherein, the piston rod of the first oil cylinder 1361 is fixedly connected with the first lifting frame 131, the piston rod of the second oil cylinder 1362 is fixedly connected with the second lifting frame 132, and the piston rods of the first oil cylinder 1361 and the second oil cylinder 1362 are all telescopic along the vertical direction.
Referring to fig. 1 and 3, two telescopic rods 135 are disposed on the frame 1 and located at two sides of the middle position of the frame 1, respectively, and the telescopic rods 135 are disposed to be inclined downward in a direction away from the frame 1. The telescopic rod 135 comprises an inner rod 1351 and an outer rod 1352, the outer rod 1352 is fixed on the rack 1, an installation cavity 5 is formed in the outer rod 1352, the installation cavity 5 upwards penetrates through the rack 1, and a sliding groove 51 is formed in the inner wall of the installation cavity 5. A sliding block 6 matched with the sliding groove 51 is fixed on the inner rod 1351, the bottom end of the inner rod 1351 penetrates through the installation cavity 5, and a positioning cone 4 is also fixed on the bottom surface of the inner rod 1351. The top end of the outer rod 1352 is also fixed with a driving cylinder 7, and a piston rod of the driving cylinder 7 extends into the installation cavity 5 and is fixedly connected with the top end of the inner rod 1351.
Referring to fig. 1 and 4, a storage chamber 8 is fixed on the lower surface of the drilling rig platform 12, the storage chamber 8 is located below the step 122, a sand discharge port 81 is formed in the bottom surface of the storage chamber 8, and a sealing plate 82 for covering the sand discharge port 81 is arranged on the storage chamber 8. The sand discharge port 81 is fixed with a slide rail 811, and the outside of the slide rail 811 is provided with a port, and the closing plate 82 is slidably mounted on the slide rail 811 and fixed by bolts. The bottom of the storage chamber 8 is integrally provided with two inclined plates 83, and the two inclined plates 83 are both inclined downwards towards the sand outlet 81.
The storage chamber 8 has a chamber 84 therein, and the chamber 84 has an opening on the outer side. A walking plate 85 is slidably arranged in the cavity 84, a connecting part 851 is fixed at one end of the walking plate 85 close to the interior of the cavity 84, and the connecting part 851 is hook-shaped. A connecting rod 86 is fixed on one side of the chamber 84 close to the opening, the length direction of the connecting rod 86 is parallel to the width direction of the chamber 84, when the walking board 85 slides out of the chamber 84, the connecting part 851 is rotatably connected to the connecting rod 86, and then the walking board 85 is turned downwards, so that the end part of the walking board 85 is abutted against the ground.
Referring to fig. 4, a cover plate 87 used for covering the opening is further arranged on the storage chamber 8, the cover plate 87 is rotatably installed on the storage chamber 8, a clamping block 871 is fixed to one side, close to the opening, of the cover plate 87, a clamping groove 88 matched with the clamping block 871 is formed in the storage chamber 8, therefore, the clamping block 871 on the cover plate 87 is in clamping fit with the clamping groove 88 in the storage chamber 8 by rotating the cover plate 87, the cover plate 87 is closed, and the walking plate 85 is stored.
The walking plate 85 is detachably connected with the connection portion 851, a connection assembly 9 is arranged between the walking plate 85 and the connection portion 851, and the connection assembly 9 comprises a convex block 91, a fixing bolt 92 and a fixing nut. The bump 91 is integrally disposed on the running board 85, and the connecting portion 851 is provided with a groove 8511 matching with the bump 91. The fixing bolt 92 is provided on the running plate 85, and the fixing bolt 92 passes through the running plate 85 and the connecting portion 851 in sequence and has one end penetrating out of the connecting portion 851. The fixing nut is arranged on one end of the fixing bolt 92 penetrating out of the connecting part 851, and is in threaded connection with the fixing bolt 92, and the fixing nut is abutted against the connecting part 851. In addition, a plurality of parallel groove bodies 852 for increasing friction are arranged on the side of the walking plate 85 away from the ground, and the length direction of the groove bodies 852 is consistent with the width direction of the walking plate 85.
Be provided with backup pad 853 on walking plate 85, walking plate 85 bottom surface is fixed and is provided with mounting panel 10, and has seted up mounting groove 101 on the mounting panel 10, and the transversal "L" of personally submitting of mounting groove 101 appears, backup pad 853 rotates and installs on mounting groove 101, when backup pad 853 supports walking plate 85, backup pad 853 is inconsistent with the inner wall of mounting groove 101 for backup pad 853 can be better firm, has further strengthened walking plate 85's steadiness.
The working principle of the embodiment is as follows:
when the drilling work is carried out, the first oil cylinder 1361 and the second oil cylinder 1362 are started, so that the first lifting frame 131 and the second lifting frame 132 are driven to move towards the direction of the ground, the drilling machine platform 12 is supported through the action of the first supporting column 133 and the second supporting column 134, the stability of the drilling machine platform 12 is realized, the driving air cylinder 7 is started simultaneously, the telescopic rod 135 is extended, the positioning cone 4 is inserted into the ground, and the two sides of the drilling machine platform 12 are further stabilized.
When operating personnel need get into control room 121 and control drilling mechanism, pull out walking board 85 from cavity 84, make connecting portion 851 and connecting rod 86 rotate and be connected, overturn walking board 85 downwards after that, make walking board 85 tip contradict with ground, later overturn out backup pad 853 again, let backup pad 853 and ground to contradict equally, and backup pad 853 can be inconsistent with the inner wall of mounting groove 101, make backup pad 853 can better firm, the steadiness of walking board 85 has further been strengthened. The operator then walks up the walking board 85 and into the operator cab 121 through the step 122 on the rig floor 12.
When the walking plate 85 is not needed, the cover plate 87 is rotated, the clamping blocks 871 are in clamping fit with the clamping grooves 88, so that the cover plate 87 can be fixed, the opening of the storage chamber 8 is covered, and the walking plate 85 is protected. When cleaning, the bolts on the sealing plate 82 are screwed off, then the sealing plate 82 is pulled out from the track, and sand and stones in the storage chamber 8 can be discharged from the sand discharge port 81 along with the inclined plates 83 on the two sides, so that the cleaning is convenient.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. The utility model provides an engineering driller, includes frame (1), set up in the crawler travel mechanism of frame (1) below, set up in rig platform (12) on frame (1), and set up in frame (1) is used for supporting all around strutting arrangement (13) of rig platform (12), its characterized in that: the supporting device (13) comprises a first lifting frame (131) arranged on the machine frame (1), a second lifting frame (132) arranged on the machine frame (1), two first supporting columns (133) arranged on the first lifting frame (131), two second supporting columns (134) arranged on the second lifting frame (132), and telescopic rods (135) which are arranged on two sides of the machine frame (1) and are obliquely arranged, and a driving component which is arranged on the machine frame (1) and is used for driving the first lifting frame (131) and the second lifting frame (132) to lift, the first lifting frame (131) and the second lifting frame (132) are respectively located at two ends of the machine frame (1) in the same direction, the first supporting columns (133) are respectively located at two ends of the first lifting frame (131) in the length direction, and the second supporting columns (134) are located at two ends of the second lifting frame (132) in the length direction.
2. An engineering driller according to claim 1, characterized in that: the first support column (133) with be provided with between first crane (131) strengthening rib (3), second support column (134) with be provided with between second crane (132) strengthening rib (3).
3. An engineering driller according to claim 1, characterized in that: and the bottoms of the first supporting column (133), the second supporting column (134) and the telescopic rod (135) are provided with positioning cones (4).
4. An engineering driller according to claim 1, characterized in that: first crane (131) and the equal vertical slip of second crane (132) are installed on frame (1), drive assembly is including setting up first hydro-cylinder (1361) and second hydro-cylinder (1362) on frame (1), just the piston rod of first hydro-cylinder (1361) with first crane (131) link to each other, the piston rod of second hydro-cylinder (1362) with second crane (132) link to each other, just first hydro-cylinder (1361) all stretches out and draws back along vertical direction with the piston rod of second hydro-cylinder (1362).
5. An engineering driller according to claim 1, characterized in that: the lifting device is characterized in that a first limiting block (1311) is fixedly arranged on the first lifting frame (131), a first limiting groove matched with the first limiting block (1311) in a sliding mode is formed in the rack (1), a second limiting block (1321) is fixedly arranged on the second lifting frame (132), and a second limiting groove (2) matched with the second limiting block (1321) in a sliding mode is formed in the rack (1).
6. An engineering driller according to claim 5, characterized in that: the cross sections of the first limiting block (1311) and the second limiting block (1321) are in a dovetail shape.
7. An engineering driller according to claim 1, characterized in that: the drilling machine is characterized in that an operation chamber (121) is arranged on the drilling machine platform (12), steps (122) are arranged on the drilling machine platform (12), a walking plate (85) is arranged on the rack (1) in a rotating mode, and a supporting plate (853) is arranged on one side, close to the ground, of the walking plate (85) in a rotating mode.
8. An engineering driller according to claim 7, characterized in that: the frame (1) is provided with a storage chamber (8), a chamber (84) used for storing the walking plate (85) is arranged in the storage chamber (8), the walking plate (85) is connected with the chamber (84) in a sliding mode, one end of the chamber (84) is provided with an opening, one end, close to the opening, of the chamber (84) is fixedly provided with a connecting rod (86), a connecting portion (851) is arranged on the walking plate (85), and when the walking plate (85) is pulled out of the chamber (84), the connecting portion (851) is connected with the connecting rod (86) in a rotating mode.
9. An engineering driller according to claim 8, characterized in that: the walking plate (85) is provided with a plurality of groove bodies (852).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021011243.2U CN212428611U (en) | 2020-06-04 | 2020-06-04 | Engineering drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021011243.2U CN212428611U (en) | 2020-06-04 | 2020-06-04 | Engineering drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212428611U true CN212428611U (en) | 2021-01-29 |
Family
ID=74271904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021011243.2U Expired - Fee Related CN212428611U (en) | 2020-06-04 | 2020-06-04 | Engineering drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212428611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863868A (en) * | 2021-09-25 | 2021-12-31 | 浙江省浙南综合工程勘察测绘院有限公司 | Balancing and reinforcing structure of drilling machine |
-
2020
- 2020-06-04 CN CN202021011243.2U patent/CN212428611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863868A (en) * | 2021-09-25 | 2021-12-31 | 浙江省浙南综合工程勘察测绘院有限公司 | Balancing and reinforcing structure of drilling machine |
| CN113863868B (en) * | 2021-09-25 | 2024-03-19 | 浙江省浙南综合工程勘察测绘院有限公司 | Balance and reinforcement structure of drilling machine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |