CN211924082U - Be used for hydraulic tunnel engineering scarfing cinder device that punches - Google Patents
Be used for hydraulic tunnel engineering scarfing cinder device that punches Download PDFInfo
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- CN211924082U CN211924082U CN202020322235.3U CN202020322235U CN211924082U CN 211924082 U CN211924082 U CN 211924082U CN 202020322235 U CN202020322235 U CN 202020322235U CN 211924082 U CN211924082 U CN 211924082U
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Abstract
The utility model provides a punching and slag-removing device for hydraulic tunnel engineering, which comprises a mounting rack and a motor, wherein the motor is transversely arranged at the rear end of the upper surface of the mounting rack; the rotating shaft is horizontally arranged above the mounting frame, the rotating shaft and the output shaft of the motor are coaxially arranged, and one end of the rotating shaft is fixed on the output shaft of the motor; the drill bit is fixedly connected to the front end of the rotating shaft. The utility model provides a scarfing cinder device for hydraulic tunnel engineering punches, through setting up the axis of rotation, rotate cover and helical blade, in drilling, helical blade carries the dregs to rotating the cover, the helical tooth in the rotation cover drives the dregs rearward movement, discharge from the discharge gate, can clear up the dregs in the hole in step, avoid the dregs to block up the hole and lead to unable normal drilling, the dregs that is difficult for producing great granule remains, can not cause the hindrance to the drill bit, the scarfing cinder effect is better, work efficiency is higher.
Description
Technical Field
The utility model relates to a hydraulic engineering technical field especially relates to a be used for hydraulic tunnel engineering scarfing cinder device that punches.
Background
In water conservancy projects, closed water delivery channels are constructed by excavating through mountains for water delivery or flood discharge, and the closed water delivery channels are called hydraulic tunnels. According to the different tasks, the tunnel can be divided into a water discharge tunnel and a water discharge tunnel. The water discharge tunnel is used for discharging water quantity required by irrigation, power generation, water supply and the like from the reservoir; the drainage tunnel is used for matching with partial flood drainage of a spillway, drainage of tail water of a hydropower station, emptying of a reservoir for overhauling a hub building or due to the needs of combat readiness and the like, sand discharge and the like.
In the work progress of tunnel engineering, often need punch the work, and need the soil sediment of beating down when punching to normally inside punches, and the scarfing cinder effect of a lot of scarfing cinder devices that have now is not good, produces dregs in the hole easily and remains, influences normal drilling work easily, and work efficiency is lower.
Therefore, there is a need to provide a new punching and slag-removing device for hydraulic tunnel engineering to solve the above technical problems.
Disclosure of Invention
The utility model provides a be used for hydraulic tunnel engineering scarfing cinder device that punches, the technical problem of solution is that some a lot of scarfing cinder device scarfing cinder effect is not good, produces dregs easily in the hole and remains, influences normal drilling work easily, and work efficiency is lower.
In order to solve the technical problem, the punching and slag removing device for the hydraulic tunnel engineering, provided by the utility model, comprises a mounting frame and a motor, wherein the motor is transversely arranged at the rear end of the upper surface of the mounting frame; the rotating shaft is horizontally arranged above the mounting frame, the rotating shaft and the output shaft of the motor are coaxially arranged, and one end of the rotating shaft is fixed on the output shaft of the motor; the drill bit is fixedly connected to the front end of the rotating shaft; the front end of the rotating sleeve is open, the rotating sleeve is rotatably sleeved on the rotating shaft, and the length of the rotating sleeve is smaller than that of the rotating shaft; the inner gear ring is fixedly sleeved on the rear end of the surface of the rotating shaft; the outer gear ring is arranged on the inner ring surface of the rotating sleeve, and the inner gear ring and the outer gear ring are concentric circles; the transmission gear is arranged between the inner gear ring and the outer gear ring and is meshed with the inner gear ring and the outer gear ring respectively to realize transmission, a support shaft is rotatably connected to the center of the front surface of the transmission gear along the axial direction of the transmission gear, and the other end of the support shaft is fixedly connected to the front end face of the inner wall surface of the rotating sleeve; the spiral teeth are arranged on the inner wall surface of the rotating sleeve in a surrounding manner along the axial direction of the rotating sleeve, and the spiral teeth are positioned on the front side of the outer gear ring in the rotating sleeve; helical blade, helical blade encircle set up in the front end on axis of rotation surface, helical blade's rear end extends to the front end of rotating the cover inner chamber, helical blade by the diameter of front end to rear end reduce gradually to with helical tooth looks adaptation. The discharge port is formed in the side wall of the rotating sleeve and is positioned between the outer gear ring and the spiral teeth on the rotating sleeve; and the slag discharging hopper is arranged on the mounting frame, and the position of the slag discharging hopper corresponds to that of the discharge port when the discharge port is positioned right below the mounting frame.
Preferably, the surface of the rotating sleeve is rotatably sleeved with a support ring, and the bottom of the support ring is fixedly connected to the mounting frame.
Preferably, the surface of the rotating sleeve is provided with a protective sleeve, the discharge port is rotatably sleeved with the protective sleeve, the bottom of the protective sleeve is provided with an opening corresponding to the discharge port, and the protective sleeve is fixedly connected to the mounting frame.
Preferably, a partition plate is fixedly connected to an inner cavity of the rotating sleeve along a radial direction of the inner cavity, the rotating shaft axially penetrates through the partition plate in a rotating mode, and the partition plate is located between the outer gear ring and the discharge hole in the length direction of the rotating sleeve.
Preferably, the bottom of mounting bracket be provided with one with arrange the bin of sediment fill intercommunication, the upper portion of bin inner chamber is provided with a backup pad, the trailing flank of backup pad with rotationally be provided with first crushing axle and the second crushing axle of mutual meshing between the trailing flank of bin internal face, the top of backup pad with be provided with one by the screen cloth of preceding to the back down-dip between the top of bin inner wall front surface.
Preferably, the rear end of axis of rotation is located the outside of rotating the cover, the fixed cover on the surface of axis of rotation rear end is equipped with a first belt pulley, the fixed cover on the surface of first crushing shaft one end is equipped with the second belt pulley, first belt pulley with connect through a belt transmission between the second belt pulley, the fixed cover on the surface of first crushing shaft one end is equipped with the driving gear, the fixed cover on the surface of second crushing shaft one end is equipped with driven gear, the driving gear with driven gear meshes each other.
Compared with the prior art, the utility model provides a be used for hydraulic tunnel engineering scarfing cinder device that punches has following beneficial effect:
the utility model provides a be used for hydraulic tunnel engineering scarfing cinder device that punches, through setting up the axis of rotation, rotate cover and helical blade, when drilling, helical blade carries the dregs to rotating the cover in, the helical tooth in the rotation cover drives the dregs rearward movement, discharge from the discharge gate, can clear up the dregs in the hole in step, avoid the dregs to block up the hole and lead to unable normal drilling, the dregs that is difficult for producing great granule remain, can not cause the hindrance to the drill bit, the scarfing cinder effect is better, work efficiency is higher.
Drawings
Fig. 1 is a schematic structural view of a preferred embodiment of the punching and slag-removing device for hydraulic tunnel engineering provided by the present invention;
FIG. 2 is a schematic view of the storage case of FIG. 1;
fig. 3 is a schematic structural view of the rotating shaft and the rotating sleeve shown in fig. 1.
Reference numbers in the figures: 1. mounting bracket, 2, motor, 3, axis of rotation, 4, the cover rotates, 5, advance the sediment fill, 6, the drill bit, 7, interior ring gear, 8, outer ring gear, 9, drive gear, 10, the back shaft, 11, the support ring, 12, the discharge gate, 13, the helical tooth, 14, helical blade, 15, baffle, 16, protective sheath, 17, arrange the sediment fill, 18, bin, 19, the backup pad, 20, first crushing shaft, 21, second crushing shaft, 22, first belt pulley, 23, second belt pulley, 24, driving gear, 25, driven gear, 26, screen cloth.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and embodiments.
Please refer to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of the punching and slag-removing device for hydraulic tunnel engineering according to the present invention; FIG. 2 is a schematic view of the storage case of FIG. 1; fig. 3 is a schematic structural view of the rotating shaft and the rotating sleeve shown in fig. 1.
The punching and slag removing device for the hydraulic tunnel engineering comprises an installation frame 1 and a motor 2, wherein the motor 2 is transversely arranged at the rear end of the upper surface of the installation frame 1; the rotating shaft 3 is horizontally arranged above the mounting frame 1, the rotating shaft 3 is coaxially arranged with an output shaft of the motor 2, and one end of the rotating shaft 3 is fixed on the output shaft of the motor 2; and the drill bit 6 is fixedly connected to the front end of the rotating shaft 6.
The front end of the rotating shaft 3 extends to the outer part of the front end of the mounting frame 1, and the motor 2 drives the rotating shaft 3 to rotate so as to drive the drill bit 6 to rotate for drilling.
The rotating sleeve 4 is open at the front end of the rotating sleeve 4, the rotating sleeve 4 is rotatably sleeved on the rotating shaft 3, and the length of the rotating sleeve 4 is smaller than that of the rotating shaft 3.
The outer diameter of the rotating sleeve 4 is smaller than the diameter of the drill bit 6, and the rotating sleeve 4 is not obstructed when extending into the hole. The rotating sleeve 4 can rotate on the surface of the rotating shaft 3.
The inner gear ring 7 is fixedly sleeved on the rear end of the surface of the rotating shaft 3, the outer gear ring 8 is arranged on the inner annular surface of the rotating sleeve 4, and the inner gear ring 7 and the outer gear ring 8 are concentric circles; the transmission gear 9 is arranged between the inner gear ring 7 and the outer gear ring 8, and the transmission gear 9 is meshed with the inner gear ring 7 and the outer gear ring 8 respectively to realize transmission.
When the motor 2 works, the rotating shaft 3 is driven to rotate, so that the inner gear ring 7 is driven to rotate, the inner gear ring 7 rotates to drive the transmission gear 9 to rotate, the transmission gear 9 and the outer gear ring 8 are meshed with each other to drive the outer gear ring 8 to rotate, and therefore the rotating sleeve 4 is driven to rotate in the direction opposite to the rotating direction of the rotating shaft 3.
The center of the front surface of the transmission gear 9 is rotatably connected with a support shaft 10 along the axial direction, and the other end of the support shaft 10 is fixedly connected to the front end face of the inner wall surface of the rotating sleeve 4.
When the transmission gear 9 is driven to rotate by the inner gear ring 7, the transmission gear 9 can drive the rotating sleeve 4 to rotate, the transmission gear 9 can rotate along with the rotating sleeve 7 at the same time, and the transmission gear 9 revolves around the inner gear ring 7 while rotating to form a group of planetary gears.
The helical teeth 13 are arranged on the inner wall surface of the rotating sleeve 4 in a surrounding manner along the axial direction of the rotating sleeve 4, and the helical teeth 13 are positioned on the front side of the outer gear ring 8 in the rotating sleeve 4; helical blade 5, helical blade 5 encircle set up in the front end on axis of rotation 3 surfaces, helical blade 5's rear end extends to the front end of rotating 4 inner chambers of cover, helical blade 5 by the diameter taper of front end to rear end to with helical tooth 13 looks adaptation.
The diameter of the front end of the helical blade 14 is the same as that of the drill 6, the diameter is gradually reduced from the front end to the rear end, the rear end extends into the rotating sleeve 4 and is matched with the inner diameter of a cylinder formed by the helical teeth 13, and the helical direction of the helical blade 14 is opposite to that of the helical teeth 13.
The rotating shaft 3 drives the rotating sleeve 4 to rotate reversely when rotating, and simultaneously drives the helical blade 14 to rotate, the helical blade 14 spirally feeds the soil residues into the rotating sleeve 4, and the rotating sleeve 4 drives the helical teeth 13 inside to rotate when rotating, so that the soil residues are continuously conveyed backwards.
The front end opening of the rotating sleeve 4 is provided with a horn-shaped slag inlet hopper 5, the diameter of the front end opening of the slag inlet hopper 5 is matched with the diameter of the front end of the spiral blade 14, and the spiral blade 14 can convey soil slag into the rotating sleeve 4 along the inner wall of the slag inlet hopper 5 in the rotating process and convey the soil slag backwards through the spiral teeth 13.
The discharge hole 12 is formed in the side wall of the rotating sleeve 4, and the discharge hole 12 is located between the outer gear ring 8 and the spiral teeth 13 on the rotating sleeve 4; and the slag discharging hopper 17 is arranged on the mounting frame 1, and when the discharge hole 12 is positioned right below, the slag discharging hopper 17 corresponds to the discharge hole 12 in position.
In the rotation process of the rotating sleeve 4, the discharge port 12 rotates along with the rotation, when the discharge port 12 is positioned right below, the soil slag falls in and out from the discharge port 12 and falls into the slag discharging hopper 17, and when the discharge port 12 is positioned on the side or above, the soil slag cannot fall downwards.
The surface of the rotating sleeve 4 is rotatably sleeved with a support ring 11, and the bottom of the support ring 11 is fixedly connected to the mounting frame 1. The rotating sleeve 4 is supported and fixed, and the rotating stability of the rotating sleeve 4 is kept.
The rotating sleeve 4 is located on the surface of the discharge port 12 and is rotatably sleeved with a protective sleeve 16, the bottom of the protective sleeve 16 is provided with an opening corresponding to the discharge port 12, and the protective sleeve 16 is fixedly connected to the mounting frame 1.
The opening of protective sheath 16 is downward, when discharge gate 12 rotates to the below, coincides with the opening of protective sheath 16, and the dregs of earth flow out downwards, when rotating cover 4 and continuing to rotate, the dregs of earth that throws away from discharge gate 12 gets into the protective sheath 16 inner chamber, and through the downward landing of the inner wall of protective sheath 16, the opening through protective sheath 16 below falls into in the sediment fill 17.
A partition plate 15 is fixedly connected to the inner cavity of the rotating sleeve 4 along the radial direction of the rotating sleeve, the rotating shaft 3 rotatably and axially penetrates through the partition plate 15, and the partition plate 15 is located between the outer gear ring 8 and the discharge hole 12 in the length direction of the rotating sleeve 4.
The bottom of mounting bracket 1 be provided with one with the bin 18 of scum hopper 17 intercommunication, the upper portion of the inner chamber of bin 18 is provided with a backup pad 19, rotationally be provided with first crushing axle 20 and the second crushing axle 21 of mutual meshing between the trailing flank of backup pad 19 and the trailing flank of bin 18 internal wall face, be provided with one by preceding to the screen cloth 26 that down inclines after to between the top of backup pad 19 with between the top of bin 18 inner wall leading flank.
The surface of the first crushing shaft 20 and the surface of the second crushing shaft 21 are both provided with crushing blades, the crushing blades are meshed with each other, and when soil residues fall between the first crushing shaft 20 and the second crushing shaft 21, the first crushing shaft 20 and the second crushing shaft 21 rotate in opposite directions to crush large-particle soil residues.
The screen cloth 16 is dwindled by the width of front end rear end gradually, the rear end of screen cloth 16 extends to between first crushing axle 20 and the second crushing axle 21, the dregs fall and screen the screen cloth 16 top, the direct whereabouts of tiny particle dregs, the big granule dregs can't fall, roll down along the screen cloth 16 and smash between first crushing axle 20 and the second crushing axle 21, the both sides of screen cloth 16 are provided with the baffle, avoid the dregs to directly drop from the both sides of screen cloth 16, guarantee to fall on the screen cloth 16 from the dregs of sediment fill 17 whereabouts completely.
An outlet is formed in the storage tank 18, so that soil residues can be conveniently cleaned.
The rear end of axis of rotation 3 is located the outside of rotating sleeve 4, the fixed cover on the surface of 3 rear ends of axis of rotation is equipped with a first belt pulley 22, the fixed cover on the surface of first crushing roller 20 one end is equipped with second belt pulley 23, first belt pulley 22 with connect through a belt transmission between the second belt pulley 23, the fixed cover on the surface of first crushing roller 20 one end is equipped with driving gear 24, the fixed cover on the surface of second crushing roller 21 one end is equipped with driven gear 25, driving gear 24 with driven gear 25 meshing each other.
Thereby motor 2 work drives axis of rotation 3 and rotates and drive first belt pulley 22 and rotate, drives second belt pulley 23 through the belt and rotates to drive first crushing roller 20 and rotate, first crushing roller 20 drives driven gear 25 through driving gear 24 and rotates, thereby drives second crushing roller 21 and rotates, first crushing roller 20 and second crushing roller 21 rotate in opposite directions, the extrusion is located the soil sediment between first crushing roller 20 and the second crushing roller 21, smash the soil sediment.
The utility model provides a theory of operation for hydraulic tunnel engineering scarfing cinder device that punches as follows:
in the drilling process, the motor 2 works to drive the rotating shaft 3 to rotate, the drill bit 6 is driven to drill to generate soil residues, the rotating shaft 3 drives the rotating sleeve 4 to reversely rotate when rotating, the helical blade 14 is driven to rotate simultaneously, the helical blade 14 sends the soil residues into the rotating sleeve 4 in a helical manner, the rotating sleeve 4 drives the internal helical teeth 13 to rotate when rotating, the soil residues are conveyed backwards continuously, in the rotating process of the rotating sleeve 4, the discharge port 12 rotates along with the helical blade, when the discharge port 12 is positioned right below, the soil residues drop downwards from the discharge port 12 to enter and exit, fall into the residue discharge hopper 17, when the discharge port 12 is positioned on the side or above, the soil residues cannot drop downwards, the soil residues fall onto the screen 16 to be screened, the small-particle soil residues directly fall, the large-particle soil residues cannot drop, and roll downwards along the screen 16 to the position between the first crushing shaft 20 and the second crushing shaft 21 to be crushed.
Compared with the prior art, the utility model provides a be used for hydraulic tunnel engineering scarfing cinder device that punches has following beneficial effect:
the utility model provides a be used for hydraulic tunnel engineering scarfing cinder device that punches, through setting up axis of rotation 3, rotate cover 4 and helical blade 14, in drilling, helical blade 14 carries the soil cinder to rotating in the cover 4, the spiral tooth in rotating the cover 4 drives the soil cinder to the back motion, discharge gate 12 is discharged, can clear up the soil cinder in the hole in step, avoid the soil cinder to block up the hole and lead to unable normal drilling, the soil cinder that is difficult for producing great granule remains, can not lead to the fact the hindrance to the drill bit, the scarfing cinder effect is better, work efficiency is higher.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a be used for hydraulic tunnel engineering scarfing cinder device that punches, includes a mounting bracket, its characterized in that:
the motor is transversely arranged at the rear end of the upper surface of the mounting rack;
the rotating shaft is horizontally arranged above the mounting frame, the rotating shaft and the output shaft of the motor are coaxially arranged, and one end of the rotating shaft is fixed on the output shaft of the motor;
the drill bit is fixedly connected to the front end of the rotating shaft;
the front end of the rotating sleeve is open, the rotating sleeve is rotatably sleeved on the rotating shaft, and the length of the rotating sleeve is smaller than that of the rotating shaft;
the inner gear ring is fixedly sleeved on the rear end of the surface of the rotating shaft;
the outer gear ring is arranged on the inner ring surface of the rotating sleeve, and the inner gear ring and the outer gear ring are concentric circles;
the transmission gear is arranged between the inner gear ring and the outer gear ring and is meshed with the inner gear ring and the outer gear ring respectively to realize transmission, a support shaft is rotatably connected to the center of the front surface of the transmission gear along the axial direction of the transmission gear, and the other end of the support shaft is fixedly connected to the front end face of the inner wall surface of the rotating sleeve;
the spiral teeth are arranged on the inner wall surface of the rotating sleeve in a surrounding manner along the axial direction of the rotating sleeve, and the spiral teeth are positioned on the front side of the outer gear ring in the rotating sleeve;
the spiral blade is arranged at the front end of the surface of the rotating shaft in a surrounding mode, the rear end of the spiral blade extends to the front end of the inner cavity of the rotating sleeve, and the diameter of the spiral blade is gradually reduced from the front end to the rear end to be matched with the spiral teeth;
the discharge port is formed in the side wall of the rotating sleeve and is positioned between the outer gear ring and the spiral teeth on the rotating sleeve;
and the slag discharging hopper is arranged on the mounting frame, and the position of the slag discharging hopper corresponds to that of the discharge port when the discharge port is positioned right below the mounting frame.
2. The perforating and slag-removing device for hydraulic tunnel engineering as claimed in claim 1, wherein the surface of the rotating sleeve is rotatably sleeved with a support ring, and the bottom of the support ring is fixedly connected to the mounting rack.
3. The punching and slag-removing device for the hydraulic tunnel engineering as claimed in claim 1, wherein a protective sleeve is rotatably sleeved on the surface of the rotary sleeve at the discharge port, an opening corresponding to the discharge port is formed in the bottom of the protective sleeve, and the protective sleeve is fixedly connected to the mounting frame.
4. The punching and slag-removing device for the hydraulic tunnel engineering as claimed in claim 1, wherein a partition is fixedly connected to the inner cavity of the rotating sleeve along the radial direction thereof, the rotating shaft rotatably and axially penetrates through the partition, and the partition is located between the outer toothed ring and the discharge hole in the length direction of the rotating sleeve.
5. The punching and slag-removing device for the hydraulic tunnel engineering as claimed in claim 1, wherein a storage box communicated with the slag-removing hopper is arranged at the bottom of the mounting frame, a supporting plate is arranged at the upper part of the inner cavity of the storage box, a first crushing shaft and a second crushing shaft which are meshed with each other are rotatably arranged between the rear side surface of the supporting plate and the rear side surface of the inner wall surface of the storage box, and a screen which is inclined downwards from front to back is arranged between the top of the supporting plate and the top of the front side surface of the inner wall of the storage box.
6. The punching and slag-removing device for hydraulic tunnel engineering as claimed in claim 5, wherein the rear end of the rotating shaft is located outside the rotating sleeve, a first belt pulley is fixedly sleeved on the surface of the rear end of the rotating shaft, a second belt pulley is fixedly sleeved on the surface of one end of the first crushing shaft, the first belt pulley and the second belt pulley are connected through a belt transmission, a driving gear is fixedly sleeved on the surface of one end of the first crushing shaft, a driven gear is fixedly sleeved on the surface of one end of the second crushing shaft, and the driving gear and the driven gear are meshed with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020322235.3U CN211924082U (en) | 2020-03-16 | 2020-03-16 | Be used for hydraulic tunnel engineering scarfing cinder device that punches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020322235.3U CN211924082U (en) | 2020-03-16 | 2020-03-16 | Be used for hydraulic tunnel engineering scarfing cinder device that punches |
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| Publication Number | Publication Date |
|---|---|
| CN211924082U true CN211924082U (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020322235.3U Active CN211924082U (en) | 2020-03-16 | 2020-03-16 | Be used for hydraulic tunnel engineering scarfing cinder device that punches |
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| CN (1) | CN211924082U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627529A (en) * | 2024-01-26 | 2024-03-01 | 贵州省公路工程集团有限公司 | Tunnel blasting drilling equipment with feeding channel and drilling method |
| CN118166865A (en) * | 2024-05-09 | 2024-06-11 | 厦门赛茵泰科工程研究院有限公司 | A disconnect-type excavation mechanism for excavating plateau frozen soil |
-
2020
- 2020-03-16 CN CN202020322235.3U patent/CN211924082U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627529A (en) * | 2024-01-26 | 2024-03-01 | 贵州省公路工程集团有限公司 | Tunnel blasting drilling equipment with feeding channel and drilling method |
| CN117627529B (en) * | 2024-01-26 | 2024-04-09 | 贵州省公路工程集团有限公司 | Tunnel blasting drilling equipment with feeding channel and drilling method |
| CN118166865A (en) * | 2024-05-09 | 2024-06-11 | 厦门赛茵泰科工程研究院有限公司 | A disconnect-type excavation mechanism for excavating plateau frozen soil |
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