CN213016356U - Quick-opening gate of shield machine - Google Patents
Quick-opening gate of shield machine Download PDFInfo
- Publication number
- CN213016356U CN213016356U CN202022143704.8U CN202022143704U CN213016356U CN 213016356 U CN213016356 U CN 213016356U CN 202022143704 U CN202022143704 U CN 202022143704U CN 213016356 U CN213016356 U CN 213016356U
- Authority
- CN
- China
- Prior art keywords
- gate
- lead screw
- thread
- sliding block
- quick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model provides a quick-opening gate of a shield machine, which relates to the technical field of shield machines and comprises a portal frame, a first gate, a second gate, a first lead screw and a driving piece, wherein the upper part of the portal frame is also provided with a first chute; the top of the first gate is provided with a first sliding block; the top of the second gate is provided with a second sliding block; the first screw rod is rotationally connected to the door frame and used for driving the first gate and the second gate to be opened or closed, and first threads and second threads with opposite rotation directions are arranged on the first screw rod; the driving piece is connected to the first lead screw. The utility model provides a shield constructs quick-opening gate of machine utilizes the driving piece to drive first lead screw rotatory, utilizes to revolve to first screw thread and second screw thread opposite and drive first slider and second slider reverse movement respectively, realizes opening or being closed of first gate and second gate, is convenient for carry out the shutoff fast smoothly to exit and opens, has simplified the drive structure, has improved drive efficiency.
Description
Technical Field
The utility model belongs to the technical field of the shield constructs the machine, more specifically says, relates to a shield constructs quick-open gate of machine.
Background
The shield machine is a special engineering machine for tunnel excavation, has the functions of excavating and cutting soil bodies, conveying soil slag, assembling tunnel linings, measuring, guiding, rectifying deviation and the like, and is widely used for tunnel engineering of subways, railways, highways, municipal works, hydropower and the like.
The basic working principle of the shield tunneling machine is that a cylindrical framework moves along the axis of the tunnel, and soil is excavated while being pushed forwards. The casing of the cylindrical assembly, the shield, acts as a temporary support for the excavated, not yet lined tunnel section, bearing the pressure of the surrounding soil layers and the pressure of the groundwater, and keeps the groundwater out of the shield. The tunnel excavation, dumping, lining and other operations are carried out under the shield of the shield, and the tunnel excavation and dumping and lining construction method has the advantages of high automation degree, labor saving, high construction speed and one-step hole forming. In addition, the shield tunneling is not influenced by weather, the ground settlement can be controlled during the excavation, the influence on ground buildings can be reduced, and the water surface traffic is not influenced during the underwater excavation.
At present, most of existing shield machines adopt a cutter disc rotating cutting mode, a cutter disc at the front end of the shield machine is used for cutting a soil layer, cut soil is transported into the shield machine through a screw conveyor, and the soil is transported to the ground through a muck trolley or a belt conveyor in the shield machine. In the construction, the screw machine can normally work after the shield machine gate is opened, a mode that a plurality of hydraulic cylinders respectively push the right gate and the left gate is adopted at present, the flexibility of opening or closing in the mode is poor, the opening and closing speed is slow, and meanwhile, the manufacturing cost of the device is high, and the economical efficiency is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shield constructs quick-opening gate to solve the shield structure that exists among the prior art and construct quick-opening gate of machine and open and close dumb, the slow technical problem of opening and close speed.
In order to achieve the above object, the utility model adopts the following technical scheme: the quick-opening gate of the shield machine comprises a gate frame, a first gate, a second gate, a first lead screw and a driving piece, wherein the gate frame is provided with an inlet and an outlet for the screw conveyor to pass in and out, and the upper part of the gate frame is also provided with a first sliding groove with a downward opening and communicated with the inlet and the outlet; the first gate is arranged in the door frame and used for plugging the inlet and the outlet, and the top of the first gate is provided with a first sliding block which is in sliding connection with the first sliding chute; the second gate is arranged in the door frame and used for being matched with the first gate to block the inlet and the outlet, and a second sliding block which is in sliding connection with the first sliding groove is arranged at the top of the second gate; the first screw rod is rotatably connected to the door frame in the horizontal direction and located below the first sliding groove, the first screw rod is used for driving the first gate and the second gate to be opened or closed, a first thread matched with the first sliding block and a second thread matched with the second sliding block are arranged on the first screw rod, and the rotating directions of the first thread and the second thread are opposite; the driving piece is connected to the first lead screw and used for driving the first lead screw to rotate.
As another embodiment of the application, the quick-opening gate of the shield tunneling machine further comprises a second chute which is arranged on the portal frame along the horizontal direction and is positioned below the first gate and the second gate; the lower part of the first gate is provided with a third sliding block in sliding fit with the second sliding groove, and the lower part of the second gate is provided with a fourth sliding block in sliding fit with the second sliding groove.
As another embodiment of this application, shield constructs quick-opening gate still includes to rotate along the horizontal direction and connects on the portal, and is located the second lead screw of second spout top, is equipped with respectively on the second lead screw to opposite third screw thread and fourth screw thread of turning round, and the second lead screw passes through third screw thread and third slider threaded connection, and the second lead screw passes through fourth screw thread and fourth slider threaded connection.
As another embodiment of the present application, the direction of rotation of the third thread coincides with the direction of rotation of the first thread, and the direction of rotation of the fourth thread coincides with the direction of rotation of the second thread.
As another embodiment of the application, the first slide block corresponds to the third slide block up and down, and the second slide block corresponds to the fourth slide block up and down.
As another embodiment of the present application, the driving member includes a motor, a first driving member and a second driving member, the motor is disposed on the gantry, and an output shaft of the motor is parallel to the first lead screw; the first transmission piece is used for connecting the output shaft and the first lead screw so as to drive the first lead screw to rotate; the second transmission piece is used for connecting the output shaft and the second lead screw so as to drive the second lead screw to rotate.
As another embodiment of this application, be equipped with two respectively with the both ends of first lead screw rotate the last mount pad of being connected and two respectively with the both ends of second lead screw rotate the lower mount pad of being connected on the portal.
As another embodiment of the application, the side surfaces of the third sliding block and the fourth sliding block are respectively provided with a dust removing brush for cleaning the periphery of the second lead screw.
As another embodiment of the present application, the outer ends of the dust removing brushes are respectively arranged obliquely to the axis of the second lead screw.
As another embodiment of the application, buffering cushions are respectively arranged on the adjacent side surfaces of the first gate and the second gate.
The utility model provides a shield constructs quick-open gate's of machine beneficial effect lies in: compared with the prior art, the quick-opening gate of the shield machine provided by the utility model utilizes the driving piece to drive the first lead screw to rotate, the first thread and the second thread arranged on the first lead screw are respectively matched with the first slider and the second slider by screw threads, under the limit action of the first chute on the first slider and the second slider, the first slider and the second slider are respectively matched with the first thread and the second thread and drive the first gate and the second gate to be opened towards two sides or closed towards the middle, thereby being convenient for rapidly and smoothly plugging and opening the inlet and the outlet, eliminating the tedious problem that a plurality of hydraulic cylinders are required to be arranged to respectively drive the first gate and the second gate in the prior art, and improving the economical efficiency of the device,
drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural view, partially cut away, in front view, of a closed state of an embodiment of a quick-opening gate of a shield tunneling machine provided by the present invention;
fig. 2 is a schematic structural view of the shield tunneling machine provided in fig. 1 in a front view in an open state when a quick-opening gate is used;
FIG. 3 is a schematic view of a portion I of FIG. 2;
fig. 4 is a schematic structural view of a closed state of another embodiment of the quick-opening gate of the shield tunneling machine according to the present invention.
Wherein, in the figures, the respective reference numerals:
1. a first gate; 11. a first slider; 12. a third slider; 2. a second gate; 21. a second slider; 22. a fourth slider; 3. a first lead screw; 31. a first thread; 32. a second thread; 4. a second lead screw; 41. a third thread; 42. a fourth thread; 5. a gantry; 51. a first chute; 52. a second chute; 53. an inlet and an outlet; 54. an upper mounting seat; 55. a lower mounting seat; 56. a dust removal brush; 6. a drive member; 61. a motor; 62. a first transmission member; 63. a second transmission member; 7. a cushion pad.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 4 together, the quick-opening gate of the shield tunneling machine of the present invention will now be described. The quick-opening gate of the shield machine comprises a gate frame 5, a first gate 1, a second gate 2, a first lead screw 3 and a driving piece 6, wherein the gate frame 5 is provided with an inlet and outlet 53 for the screw conveyor to enter and exit, and the upper part of the gate frame 5 is also provided with a first sliding chute 51 with a downward opening and communicated with the inlet and outlet 53; the first gate 1 is arranged in the door frame 5 and used for plugging the inlet and outlet 53, and the top of the first gate 1 is provided with a first sliding block 11 which is in sliding connection with the first sliding groove 51; the second gate 2 is arranged in the door frame 5 and is used for being matched with the first gate 1 to block the inlet and outlet 53, and the top of the second gate 2 is provided with a second sliding block 21 which is in sliding connection with the first sliding groove 51; the first lead screw 3 is rotatably connected to the portal 5 along the horizontal direction and is positioned below the first sliding groove 51, the first lead screw 3 is used for driving the first gate 1 and the second gate 2 to open or close, a first thread 31 matched with the first sliding block 11 and a second thread 32 matched with the second sliding block 21 are arranged on the first lead screw 3, and the rotating directions of the first thread 31 and the second thread 32 are opposite; the driving member 6 is connected to the first lead screw 3 and is used for driving the first lead screw 3 to rotate.
Compared with the prior art, the quick-opening gate of the shield machine provided by the utility model utilizes the driving piece 6 to drive the first lead screw 3 to rotate, the first thread 31 and the second thread 32 arranged on the first lead screw 3 are respectively in thread fit with the first slider 11 and the second slider 21, under the limiting action of the first chute 51 on the first slider 11 and the second slider 21, the first slider 11 and the second slider 21 are respectively in thread fit with the first thread 31 and the second thread 32, and the first gate 1 and the second gate 2 are driven to be opened towards two sides or closed towards the middle, so as to be convenient for quickly and smoothly plugging and opening the inlet and outlet 53, thus the tedious problem that a plurality of hydraulic cylinders are required to be arranged to respectively drive the first gate 1 and the second gate 2 is eliminated, and the economical efficiency of the device is improved,
as a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4, as another embodiment of the present application, the quick-opening gate of the shield machine further includes a second chute 52 disposed on the portal 5 along the horizontal direction and located below the first gate 1 and the second gate 2; the lower part of the first gate 1 is provided with a third slide block 12 in sliding fit with the second slide groove 52, and the lower part of the second gate 2 is provided with a fourth slide block 22 in sliding fit with the second slide groove 52.
In this embodiment, when utilizing first lead screw 3 to carry out reverse drive to first slider 11 and second slider 21, second spout 52 has still been set up in the below of first gate 1 and second gate 2, first gate 1 passes through third slider 12, second gate 2 passes through fourth slider 22 and second spout 52 sliding fit, utilize second spout 52 to realize effectively injecing first gate 1 and 2 lower part traffic direction of second gate, the vibration of first gate 1 and second gate 2 lower part when opening and shutting along the water direction has been avoided rocking, the noise of opening and shutting has been reduced, the life of device has been improved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 4, the quick-opening gate of the shield machine further includes a second lead screw 4 connected to the gantry 5 and located above the second chute 52 along the horizontal direction, the second lead screw 4 is provided with a third thread 41 and a fourth thread 42 with opposite rotation directions, the second lead screw 4 is connected to the third slider 12 through the third thread 41, and the second lead screw 4 is connected to the fourth slider 22 through the fourth thread 42.
In this embodiment, set up second lead screw 4 in first gate 1 and second gate 2 below, can cooperate first lead screw 3 to carry out horizontal drive to first gate 1 and second gate 2, in order to guarantee that the upper and lower position homoenergetic of first gate 1 and second gate 2 can receive effective drive, avoid first gate 1 and second gate 2 to only receive the problem that the top drive power caused the jamming easily, improve the drive and realize the steady smooth and easy of process of opening and shutting, guaranteed the efficiency of opening and shutting.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 4, the turning direction of the third thread 41 is consistent with the turning direction of the first thread 31, and the turning direction of the fourth thread 42 is consistent with the turning direction of the second thread 32.
The first thread 31 and the second thread 32 adopt opposite rotation directions, and when the first lead screw 3 rotates, the first thread 31 and the second thread 32 can be respectively utilized to realize the back driving of the first slider 11 and the second slider 21, so that the rapid opening and closing are realized. Similarly, when the second lead screw 4 drives the third slider 12 and the fourth slider 22, the third thread 41 and the fourth thread 42 with opposite rotation directions are respectively used to assist the first lead screw 3 in driving the first gate 1 and the second gate 2. Furthermore, the first thread 31 and the third thread 41 have the same rotating direction, and the second thread 32 and the fourth thread 42 have the same rotating direction, so that uniform processing is facilitated, and the synchronism of driving is ensured.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 4, the first slider 11 corresponds to the third slider 12 up and down, and the second slider 21 corresponds to the fourth slider 22 up and down.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 4, the driving member 6 includes a motor 61, a first transmission member 62 and a second transmission member 63, the motor 61 is disposed on the gantry 5, and an output shaft of the motor 61 is parallel to the first lead screw 3; the first transmission piece 62 is used for connecting the output shaft and the first lead screw 3 to drive the first lead screw 3 to rotate; the second transmission member 63 is used for connecting the output shaft and the second lead screw 4 to drive the second lead screw 4 to rotate.
In this embodiment, the first transmission member 62 is used to connect the motor 61 and the first lead screw 3 to drive the first lead screw 3, and the second transmission member 63 is used to connect the motor 61 and the second lead screw 4 to effectively drive the second lead screw 4. The first transmission piece 62 and the second transmission piece 63 are respectively driven by the motor 61, so that the first lead screw 3 and the second lead screw 4 are synchronously driven, the number of the driving pieces 6 is greatly reduced, the structure of the device is simplified, and the overall cost of the device is reduced.
Further, the first transmission member 62 may be in the form of a belt drive, a chain drive or a gear drive. Because of the large space occupied by the gear drive, a chain drive or belt drive is preferred.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 4, two upper mounting seats 54 rotatably connected to two ends of the first lead screw 3 and two lower mounting seats 55 rotatably connected to two ends of the second lead screw 4 are disposed on the gantry 5.
First lead screw 3 links to each other with portal 5 through last mount pad 54, and second lead screw 4 links to each other with portal 5 through mount pad 55 down, goes up mount pad 54 and is equipped with at least two, is located the both ends of first lead screw 3 respectively, and same lower mount pad 55 also is equipped with two at least, and is located the both ends of second lead screw 4 respectively, utilizes mount pad 54 and mount pad 55 down to realize the stable installation of first lead screw 3 and second lead screw 4.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 4, the third slider 12 and the fourth slider 22 are respectively provided with a dust removing brush 56 for cleaning the periphery of the second lead screw 4. In the working process of the shield tunneling machine, a large amount of muck can be generated, the muck is easy to fall on the surface of the second screw rod 4 positioned below the first gate 1 and the second gate 2, and in order to clean the muck on the second screw rod 4 and realize the smooth driving of the second screw rod 4 to the third slider 12 and the fourth slider 22, the third slider 12 and the fourth slider 22 are respectively provided with the dust removing brushes 56. The dust removing brush 56 is arranged on both sides of the third slide block 12 and the fourth slide block 22 and used for removing the slag on the periphery of the second lead screw 4.
Further, in order to improve the efficiency of the dust removing brush 56 for cleaning the periphery of the second lead screw 4, the outer end of the dust removing brush 56 is respectively arranged in an inclined manner towards the axis of the second lead screw 4, so that the outer end of the brush hair of the dust removing brush 56 can be effectively contacted with the periphery of the second lead screw 4, the periphery of the second lead screw 4 is comprehensively cleaned, and the blockage between the second lead screw 4 and the third sliding block 12 and the fourth sliding block 22 caused by the muck on the second lead screw 4 is avoided.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1, fig. 2 and fig. 4, the side surfaces of the first gate 1 adjacent to the second gate 2 are respectively provided with a buffer pad 7. When the first gate 1 and the second gate 2 are closed towards the middle part of the inlet 53, the buffer cushion 7 can play a good buffer role, and the first gate 1 and the second gate 2 are prevented from being damaged by collision. The cushion pad 7 has a flexible member with a certain thickness, and has a good impact resistance effect.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Quick-opening gate of shield machine, its characterized in that includes:
the portal frame is provided with an inlet and an outlet for the inlet and the outlet of the screw conveyor, and the upper part of the portal frame is also provided with a first sliding chute with a downward opening and communicated with the inlet and the outlet;
the first gate is arranged in the door frame and used for plugging the inlet and the outlet, and a first sliding block in sliding connection with the first sliding groove is arranged at the top of the first gate;
the second gate is arranged in the door frame and used for being matched with the first gate to block the inlet and the outlet, and a second sliding block which is in sliding connection with the first sliding groove is arranged at the top of the second gate;
the first screw rod is rotatably connected to the door frame in the horizontal direction and located below the first sliding groove, the first screw rod is used for driving the first gate and the second gate to be opened or closed, a first thread matched with the first sliding block and a second thread matched with the second sliding block are arranged on the first screw rod, and the rotating directions of the first thread and the second thread are opposite; and
and the driving piece is connected to the first lead screw and is used for driving the first lead screw to rotate.
2. The shield machine quick-opening gate of claim 1, further comprising a second chute disposed on the portal in a horizontal direction and below the first gate and the second gate; the lower part of the first gate is provided with a third sliding block in sliding fit with the second sliding groove, and the lower part of the second gate is provided with a fourth sliding block in sliding fit with the second sliding groove.
3. The quick-opening gate of the shield machine according to claim 2, further comprising a second lead screw connected to the portal frame in a horizontal direction and located above the second sliding groove, wherein the second lead screw is provided with a third thread and a fourth thread with opposite rotation directions, the second lead screw is in threaded connection with the third slider through the third thread, and the second lead screw is in threaded connection with the fourth slider through the fourth thread.
4. The shield tunneling machine quick-opening gate of claim 3, wherein the third thread has a direction of rotation that is consistent with the direction of rotation of the first thread, and wherein the fourth thread has a direction of rotation that is consistent with the direction of rotation of the second thread.
5. The shield tunneling machine quick-opening gate of claim 3, wherein the first sliding block corresponds to the third sliding block up and down, and the second sliding block corresponds to the fourth sliding block up and down.
6. The shield tunneling machine quick-opening gate of claim 3, wherein the drive comprises:
the motor is arranged on the door frame, and an output shaft of the motor is parallel to the first lead screw;
the first transmission piece is used for connecting the output shaft and the first lead screw so as to drive the first lead screw to rotate; and
and the second transmission part is used for connecting the output shaft and the second lead screw so as to drive the second lead screw to rotate.
7. The shield tunneling machine quick-opening gate of any one of claims 3-6, wherein the portal frame is provided with two upper mounting seats rotatably connected to two ends of the first lead screw, respectively, and two lower mounting seats rotatably connected to two ends of the second lead screw, respectively.
8. The quick-opening gate of the shield tunneling machine according to any one of claims 3-6, wherein dust removing brushes for cleaning the outer periphery of the second lead screw are respectively arranged on the side surfaces of the third sliding block and the fourth sliding block.
9. The quick-opening gate of the shield tunneling machine according to claim 8, wherein the outer ends of the dust removing brushes are respectively arranged obliquely to the axis of the second lead screw.
10. The quick-opening gate of the shield machine according to any one of claims 1 to 6, wherein the first gate and the second gate are provided with cushions on the adjacent sides respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022143704.8U CN213016356U (en) | 2020-09-25 | 2020-09-25 | Quick-opening gate of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022143704.8U CN213016356U (en) | 2020-09-25 | 2020-09-25 | Quick-opening gate of shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213016356U true CN213016356U (en) | 2021-04-20 |
Family
ID=75480088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022143704.8U Expired - Fee Related CN213016356U (en) | 2020-09-25 | 2020-09-25 | Quick-opening gate of shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213016356U (en) |
-
2020
- 2020-09-25 CN CN202022143704.8U patent/CN213016356U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108952748B (en) | Open TBM bottom comprehensive slag removal system | |
| CN201412155Y (en) | Roller jaw type rock loader | |
| CN213016356U (en) | Quick-opening gate of shield machine | |
| CN210370629U (en) | Drill bit device for coal mining and tunneling in coal mine | |
| CN116550705B (en) | Cable calandria pull throughs | |
| CN113464158A (en) | Slag removing device for full-face hard rock heading machine | |
| CN213504917U (en) | A feed mechanism for fertilizer production | |
| CN213333054U (en) | Water conservancy construction drainage device | |
| CN210217725U (en) | Shovel plate of coal mine development machine | |
| CN215565951U (en) | Slag removing device for full-face hard rock heading machine | |
| CN208594583U (en) | A kind of linear running slipping mechanism of mechanical arm | |
| CN112695821A (en) | Excavator bucket with clay stripping function and using method thereof | |
| CN111589817B (en) | Subway shield constructs synchronous slip casting belt cleaning device | |
| CN213836786U (en) | Novel hydraulic excavator for open pit coal mining | |
| CN101580182B (en) | Roll jaw type rock loading machine | |
| CN111576606B (en) | Water conservancy pipeline desilting equipment | |
| CN212389346U (en) | Shield constructs quick-witted quarrying device | |
| CN209308092U (en) | A kind of excavator base fixing device for facilitating installation fixed | |
| CN112065430A (en) | Shield tunneling machine quarrying device and working method | |
| CN215256173U (en) | Cutting device for coal mining of coal mine | |
| CN206737926U (en) | Shoveling formula development machine for push pipe operation | |
| CN212837809U (en) | Receiving frame for dark turning head of shield tunneling machine | |
| CN218931733U (en) | Reverse fishing type fine grid machine for sewage treatment plant | |
| CN217811031U (en) | Construction engineering construction is with clear native equipment in on-spot stake hole | |
| CN212129285U (en) | Ditching device for burying water pipeline underground |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210420 Termination date: 20210925 |