CN202108064U - Vertical slot milling machine - Google Patents
Vertical slot milling machine Download PDFInfo
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- CN202108064U CN202108064U CN2011201708404U CN201120170840U CN202108064U CN 202108064 U CN202108064 U CN 202108064U CN 2011201708404 U CN2011201708404 U CN 2011201708404U CN 201120170840 U CN201120170840 U CN 201120170840U CN 202108064 U CN202108064 U CN 202108064U
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Abstract
A vertical slot milling machine comprises a host machine chassis, a pillar, a portal frame, a guiding frame, a milling box, a milling stirring chain, a steel wire rope, a sway rod and a rectifying mechanism, wherein the milling frame adopts a box-type box, and can extend to the set length; the milling stirring chain comprises a chain, a plurality of groups of milling cutter bodies, and a plurality of groups of stirring bodies; the milling cutter bodies are fixedly mounted on the chain in a crossed manner at certain intervals; the chain is mounted on a drive sprocket and a driven sprocket to form a chain transmission mechanism; a gearbox is positioned at the upper part of the milling box; a driving head is fixedly mounted above the gearbox; the driven sprocket is mounted on an output shaft at the lower end of the gearbox; the output shaft is mounted on a supporting station; one end of a tension cylinder is hinged with the lower part of the supporting station; the other end of the tension cylinder is connected with a lower rod piece; a sensor of the rectifying mechanism is arranged in the length direction of the milling frame; a plurality of groups of grouting pipes are arranged inside the milling frame in the direction of the length direction of the milling frame; and the end parts of the grouting pipes are connected with spray nozzles. The utility model is suitable for large building underground facilities and deep foundation excavation and hydraulic dam cut-off wall construction.
Description
Affiliated technical field
The utility model relates to a kind of vertical slotter that in underground deep foundation engineering, bores the layer that picks up, builds the uniform thickness diaphragm wall.
Background technology
At present, building underground installation, Deep Foundation Excavation and the construction of water conservancy permeated-proof walls of dam generally adopt multiaxial type diaphragm wall auger and two kinds of technology of underground continuous digging machine to carry out construction of continuous concrete wall.
Adopt multiaxial type diaphragm wall auger to build colonnade formula diaphragm wall, promptly present widely used SMW worker's method uses multiaxial type diaphragm wall rig to bore pick continuously, stir and promote; Soil and cement paste are mixed stirring in situ; Each is constructed to overlap between the unit to build and bores the pick construction repeatedly, builds up the native mine dam of underground retaining that cement mixes with soil, simultaneously before cement-soil is still uncured; Insert the intensity that shaped steel improves body of wall, treat just to form after cement-soil solidifies fully a colonnade formula diaphragm wall.But there is following problem in this technology: 1) owing to the diaphragm wall body of wall is formed by each unit cylinder overlap joint; Non-overlapping part appears between each cylinder easily; When carrying out the construction of diaphragm wall of the big degree of depth; Dislocation just appears in adjacent overlap joint cylinder, and strength of wall body is affected, and causes body of wall percolating water.2) because colonnade formula diaphragm wall overlap joint forms, and its cross section is the sugarcoated haws string shape that width does not wait, waist paddy place body of wall width dimensions is minimum, intensity is the weakest, is prone to leakage problem.3) since colonnade formula diaphragm wall be through each construction unit brill pick, stir, promote, move and the repeating step of overlap joint is accomplished, therefore, construction technology is complicated, construction speed is slow; Particularly the ultra-deep underground continuous wall construction need add stacks repeatedly, increases constructor's operation intensity greatly, and efficiency of construction is low.4) for improving the diaphragm wall operating efficiency; Avoid the method for spreading drilling rod repeatedly, once bore pick to the job practices that requires the degree of depth, then must use the pile frame of bigger column height and adopt; Therefore job stabilization is poor, and the security incident that pile frame collapses takes place easily.
Adopt underground continuous digging machine to build diaphragm wall; Promptly stir chain, to the continuous digging of horizontal cross, inject soil solidification liquid simultaneously and mix stirring after digging stirring chain is dug in the ground with soil, sand through the digging of drive installation between drive sprocket and driven sprocket; Form the native mine dam of underground retaining that cement mixes with soil; Before cement-soil is still uncured, insert the intensity that shaped steel improves body of wall simultaneously, treat just to form a diaphragm wall after cement-soil solidifies fully.But there is following problem in this technology: 1) because the drive sprocket of chain is stirred in the digging of underground continuous digging machine is installed on the periphery of planetary reducer; Give planetary reducer by prime mover with transmission of power; Pass to drive sprocket through the planetary reducer deceleration, satisfy the construction requirement that drives low-speed big, because the prime mover that rotates at a high speed produces a large amount of heats in the moderating process of the drive sprocket of low speed rotation; The planetary reducer temperature rise is accelerated; Reduce the application life of planetary reducer, and maintaining is complicated, has influenced construction of continuous concrete wall efficient greatly; 2) because the spout of curing compound is positioned at the lower end of guide pillar; The curing compound of ejection only mixes stirring by the stirring rod single direction on the chain; Cause the curing agent content skewness of diaphragm wall body of wall depth direction; Directly cause the body of wall inherent quality after the curing inhomogeneous, influence the intensity and the sealing barrier performance of body of wall; 3) because no deviation correction control system makes the vertical precision of body of wall can't wait until effective correction, the construction precision of body of wall is affected.
Summary of the invention
The purpose of the utility model is according to the deficiency that exists in the prior art, and a kind of vertical slotter of building the uniform thickness diaphragm wall is provided, and can effectively improve body application life, efficiency of construction and security performance, satisfies the homework precision of uniform thickness diaphragm wall.
The utility model is realized through following technical scheme:
A kind of vertical slotter comprises main frame, column, door type framework, leading truck, milling case, milling stirring chain, wire rope, hound and deviation correction mechanism; Wherein: main frame comprises power source, elevator unit; Column comprises guide rail and top pulleys frame; Door type framework comprises frame body, moves horizontally oil cylinder, cross track and guide holder; Leading truck comprises support body, guide runner and vertical jacking cylinder; The milling case comprises driving head, gearbox, drive sprocket, milling frame, tensioning hydro-cylinder, driven sprocket and the grout pipe that contains motor and planetary reducer; The milling frame adopts box-structure, comprises top joint, connecting elements and bottom joint; Milling is stirred chain and is comprised chain, is packed in some groups of end mill bodies and the some groups of stirring bodies on the chain by the certain intervals distance; Deviation correction mechanism comprises some sensors and connecting line; It is characterized in that: said chain is installed on formation chain-drive mechanism in back on drive sprocket and the driven sprocket; Said milling case places in the upper and lower slide rail of leading truck, can under the effect of vertical jacking cylinder, move up and down; Said gearbox is positioned at the top of milling case; The said driving head that contains motor and planetary reducer is installed in the installation site of gearbox top; Installing drive sprocket wheel on the output shaft of said gearbox lower end; Said output shaft is installed on the supporting station that places joint top, top; One end of the bottom of said supporting station and tensioning hydro-cylinder is hinged; The other end of tensioning hydro-cylinder is connected with the bottom rod member of top joint; Said driven sprocket is installed in the joint installation site, bottom of milling frame; Said connecting elements inside is provided with passage along milling frame length direction; Said sensor is arranged in the passage by the certain intervals distance through connecting line; Said grout pipe has many groups, is arranged in parallel in the inside of connecting elements, its end connection shower nozzle along milling frame length direction and deviation correction mechanism; Said shower nozzle has many groups and can be with a plurality of angle atomizing of liquids, and the two sides saved of the connecting elements that is arranged in the milling frame and bottom; The guide runner of said leading truck places in the cross track of type framework, makes the leading truck move left and right under the oil cylinder effect moving horizontally; The guide holder of said door type framework places on the guide rail of column, through promoting with putting down with a wire rope that type framework upper end is connected a type framework is moved up and down; The other end of said wire rope passes the top pulleys frame and is connected with the elevator unit of main frame; Said hound is provided with telescoping mechanism, and the one of which end is packed in the middle part of column, and the other end is packed in the main frame rear portion.
The utility model can be that described driving head can have two groups, is arranged symmetrically in installation site, gearbox top.
The utility model can also be, the cutter head of described every group of end mill body has 2-4, and with the cutter head cross arrangement of adjacent one group of end mill body, end mill body is packed on the chain through bolt.
The utility model can also be, the puddler of described every group of stirring body has 2-4, and with the puddler cross arrangement of adjacent one group of stirring body, stirring body is packed on the chain through bolt.
The utility model can also be that described end mill body and stirring body stir arranged crosswise on the chain in milling.
The utility model can also be, described milling frame can be through being provided with the more piece connecting elements and growing to the length of setting by fastener.
The utility model can also be, the described oil cylinder that moves horizontally has 2 groups, lays respectively at the both sides of leading truck, and one of which end and frame body install, and the other end and support body install.
The utility model can also be, described vertical jacking cylinder has 2 groups, lays respectively at the both sides of milling case, and one of which end and milling frame install, and the other end and support body install.
The vertical slotter of the utility model has following good effect and advantage:
1, according to the utility model; Vertical slotter adopts motor, planetary reducer, the gearbox kind of drive of deceleration step by step to drive sprocket; Effectively improve the application life of motor, planetary reducer, maintaining is simple and convenient, greatly reduces the maintenance cost of unit in charge of construction.
2, according to the utility model, vertical slotter adopts large-scale crawler belt or walking type pile-driving frame chassis as machine-tool, has characteristics such as the high and operation of job stability is reliable, effectively improves the construction of continuous concrete wall security performance.
3, according to the utility model, vertical slotter adopts the milling frame of box-structure, stirs in downward digging of chain and the whipping process in milling the diaphragm wall inwall is played a very good protection, and guarantees that construction thickness, the intensity of body of wall reaches construction requirement.
4, according to the utility model, vertical slotter adopts deviation correction mechanism, through the sensor that is arranged on milling frame side the body of wall precision is monitored in real time and is corrected, and guarantees that effectively the diaphragm wall body of wall reaches the vertical precision of designing requirement.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the structural representation of the utility model;
Fig. 2 is Fig. 1 left view;
Fig. 3 is the partial structurtes sketch map of leading truck and milling frame among Fig. 2;
Fig. 4 is the partial structurtes sketch map of the driven sprocket of milling frame among Fig. 2;
Fig. 5 be among Fig. 4 A-A to sectional view;
Fig. 6 be among Fig. 3 B-B to sectional view.
The specific embodiment
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, a kind of vertical slotter comprises main frame 1, column 2, door type framework 3, leading truck 4, milling case 5, milling stirring chain 6, wire rope 7, hound 8 and deviation correction mechanism 9; Wherein: main frame 1 comprises power source 11, elevator unit 12; Column 2 comprises guide rail 21 and top pulleys frame 22; Door type framework 3 comprises frame body 31, moves horizontally oil cylinder 32, cross track 33 and guide holder 34; Leading truck 4 comprises support body 41, guide runner 42 and vertical jacking cylinder 43; Milling case 5 comprises driving head 51, gearbox 52, drive sprocket 53, milling frame 54, tensioning hydro-cylinder 55, driven sprocket 56 and the grout pipe 57 that contains motor and planetary reducer; Milling frame 54 adopts box-structure, comprises top joint 541, connecting elements 542 and bottom joint 543; Described milling frame 54 can be through being provided with more piece connecting elements 542 and growing to the length of setting by fastener; Milling is stirred chain 6 and is comprised chain 61, is packed in some groups of end mill bodies 62 and the some groups of stirring bodies 63 on the chain 61 by the certain intervals distance; The cutter head 622 of described every group of end mill body 62 has 2-4, and with cutter head 622 cross arrangements of adjacent one group of end mill body 62, end mill body 62 is packed on the chain 61 through bolt; The puddler 633 of said every group of stirring body 63 has 2-4, and with puddler 633 cross arrangements of adjacent one group of stirring body 63, stirring body 63 is packed on the chain 61 through bolt; Said end mill body 62 stirs arranged crosswise on the chain 6 with stirring body 63 in milling; Deviation correction mechanism 9 comprises some sensors 91 and connecting line 93; It is characterized in that: said chain 61 is installed on formation chain-drive mechanism in back on drive sprocket 53 and the driven sprocket 56; Said milling case 5 places in the upper and lower slide rail of leading truck 4, can under the effect of vertical jacking cylinder 43, move up and down; Said vertical jacking cylinder 43 has 2 groups, lays respectively at the both sides of milling case 5, and one of which end and milling frame 54 install, and the other end and support body 41 install; Said gearbox 52 is positioned at the top of milling case 5; Said driving head 51 is installed in the installation site of gearbox 52 tops; Described driving head 51 can have two groups, is arranged symmetrically in installation site, gearbox 52 top; Installing drive sprocket wheel 53 on the output shaft 524 of said gearbox 52 lower ends; Said output shaft 524 is installed and is placed top to save on the supporting station 5411 on 541 tops; One end of the bottom of said supporting station 5411 and tensioning hydro-cylinder 55 is hinged; The other end of tensioning hydro-cylinder 55 is connected with the bottom rod member 5412 of top joint 541; 543 installation sites are saved in the bottom that said driven sprocket 56 is installed in milling frame 54; Said connecting elements 542 inside are provided with passage 92 along milling frame 54 length directions; Said sensor 91 is arranged in the passage 92 by the certain intervals distance through connecting line 93; Said grout pipe 57 has many groups, is arranged in parallel in the inside of connecting elements 532, its end connection shower nozzle 571 along milling frame 53 length directions and deviation correction mechanism 9; Said shower nozzle 571 has many groups and can be with a plurality of angle atomizing of liquids, and is arranged in the two sides of connecting elements 542 with the bottom joint 5343 of milling frame 54; The guide runner 42 of said leading truck 4 places in the cross track of type framework 3 33, makes leading truck 4 move left and right moving horizontally under oil cylinder 32 effect; The said oil cylinder 32 that moves horizontally has 2 groups, lays respectively at the both sides of leading truck 4, and one of which end and frame body 31 install, and the other end and support body 41 install; The guide holder 34 of said door type framework 3 places on the guide rail 21 of column 2, through promoting with putting down with a wire rope 7 that type framework 3 upper ends are connected a type framework 3 is moved up and down; The other end of said wire rope 7 passes top pulleys frame 22 and is connected with the elevator unit 12 of main frame 1; Said hound 8 is provided with telescoping mechanism, and the one of which end is packed in the middle part of column 2, and the other end is packed in main frame 1 rear portion.
When the vertical slotter of the utility model carries out the diaphragm wall operation; Start power source 11 and make main frame 1 construction location of walking; Control elevator unit 12 puts down the wire rope 7 that is connected with door type framework 3 upper ends, and leading truck 4, milling case 5 are descended with door type framework 3; When the driven sprocket 56 following millings of the bottom joint that is positioned at milling frame 54 543 are stirred chain 6 and are contacted with ground; Start the driving head 51 that contains motor and planetary reducer; Transmission of power by planetary reducer slows down is given gearbox 52; Drive drive sprocket 53 low speed rotation on the output shaft 524; Move up and down between drive chain 53 and driven sprocket 56 thereby make at milling stirring chain 6 on the milling frame 54 on the milling case 5, the type framework 3 that makes of handling the wire rope 7 on the elevator unit 12 descends 54 downward feeding milling and the stirrings of milling frame; Manipulation moves horizontally oil cylinder 32 makes milling frame 54 laterally move with leading truck 4, and milling is stirred chain 6 and accomplished traverse feed digging and stirring; In the process that milling frame 54 constantly descends, the end mill body 62 that arranged crosswise on the chain 6 is stirred in milling carries out digging and stirring with 63 pairs of soil of stirring body, forms a continuous wide soil box; Detect control with the tilt fore and aft degree about 92 pairs of milling framves 54 of sensor that can be through being arranged on the inner deviation correction mechanism 9 of connecting elements 542 along milling frame 54 length directions; And in time feed back to operating personnel; Telescoping mechanism through controlling vertical jacking cylinder 43, moving horizontally oil cylinder 32 and hound 8 is rectified a deviation to milling frame 54, to reach the construction precision of designing requirement; In above-mentioned digging and stirring, inject soil solidification liquid through grout pipe 57, the many groups shower nozzle 571 that saves 543 two sides through the connecting elements 542 and the bottom that are arranged in milling frame 54 covers whole digging and stirring region with a plurality of angle atomizing of liquids; Stirring chain 6 through milling fully mixes the native sand in the soil box stirring with soil solidification liquid, is full of soil box; After solidifying after a while, can form a diaphragm wall that uniform thickness is smooth; Before body of wall does not solidify as yet fully, can insert the strength of wall body that shaped steel improves diaphragm wall.
Claims (8)
1. a vertical slotter comprises main frame (1), column (2), door type framework (3), leading truck (4), milling case (5), milling stirring chain (6), wire rope (7), hound (8) and deviation correction mechanism (9); Wherein: main frame (1) comprises power source (11), elevator unit (12); Column (2) comprises guide rail (21) and top pulleys frame (22); Door type framework (3) comprises frame body (31), moves horizontally oil cylinder (32), cross track (33) and guide holder (34); Leading truck (4) comprises support body (41), guide runner (42) and vertical jacking cylinder (43); Milling case (5) comprises driving head (51), gearbox (52), drive sprocket (53), milling frame (54), tensioning hydro-cylinder (55), driven sprocket (56) and the grout pipe (57) that contains motor and planetary reducer; Milling frame (54) adopts box-structure, comprises top joint (541), connecting elements (542) and bottom joint (543); Milling is stirred chain (6) and is comprised chain (61), is packed in some groups of end mill bodies (62) and the some groups of stirring bodies (63) on the chain (61) by the certain intervals distance; Deviation correction mechanism (9) comprises some sensors (91) and connecting line (93); It is characterized in that: said chain (61) is installed on drive sprocket (53) and driven sprocket (56) is gone up back formation chain-drive mechanism; Said milling case (5) places in the upper and lower slide rail of leading truck (4), can under the effect of vertical jacking cylinder (43), move up and down; Said gearbox (52) is positioned at the top of milling case (5); The said driving head (51) that contains motor and planetary reducer is installed in the installation site of gearbox (52) top; The output shaft (524) of said gearbox (52) lower end is gone up installing drive sprocket wheel (53); Said output shaft (524) is installed on the supporting station (5411) that places joint (541) top, top; One end of the bottom of said supporting station (5411) and tensioning hydro-cylinder (55) is hinged; The other end of tensioning hydro-cylinder (55) is connected with the bottom rod member (5412) of top joint (541); Said driven sprocket (56) is installed in joint (543) installation site, bottom of milling frame (54); Said connecting elements (542) is inner to be provided with passage (92) along milling frame (54) length direction; Said sensor (91) is arranged in the passage (92) by the certain intervals distance through connecting line (93); Said grout pipe (57) has many groups, is arranged in parallel in the inside of connecting elements (532), its end connection shower nozzle (571) along milling frame (53) length direction and deviation correction mechanism (9); Said shower nozzle (571) has many groups and can be with a plurality of angle atomizing of liquids, and the two sides of (5343) are saved in the connecting elements (542) that is arranged in milling frame (54) and bottom; The guide runner (42) of said leading truck (4) places in the cross track (33) of a type framework (3), makes leading truck (4) move left and right moving horizontally under oil cylinder (32) effect; The guide holder (34) of said door type framework (3) places on the guide rail (21) of column (2), through promoting with putting down with a wire rope (7) that type framework (3) upper end is connected a type framework (3) is moved up and down; The other end of said wire rope (7) passes top pulleys frame (22) and is connected with the elevator unit (12) of main frame (1); Said hound (8) is provided with telescoping mechanism, and the one of which end is packed in the middle part of column (2), and the other end is packed in main frame (1) rear portion.
2. vertical slotter according to claim 1 is characterized in that described driving head (51) can have two groups, is arranged symmetrically in installation site, gearbox (52) top.
3. vertical slotter according to claim 1; The cutter head (622) that it is characterized in that described every group of end mill body (62) has 2-4; And with cutter head (622) cross arrangement of adjacent one group of end mill body (62), end mill body (62) is packed on the chain (61) through bolt.
4. vertical slotter according to claim 1; The puddler (633) that it is characterized in that described every group of stirring body (63) has 2-4; And with puddler (633) cross arrangement of adjacent one group of stirring body (63), stirring body (63) is packed on the chain (61) through bolt.
5. according to claim 1 or 3 or 4 described vertical slotters, it is characterized in that described end mill body (62) and stirring body (63) stir chain (6) in milling and go up arranged crosswise.
6. vertical slotter according to claim 1 is characterized in that described milling frame (54) can be through being provided with more piece connecting elements (542) and growing to the length of setting by fastener.
7. vertical slotter according to claim 1 is characterized in that the described oil cylinder (32) that moves horizontally has 2 groups, lays respectively at the both sides of leading truck (4), and one of which end and frame body (31) install, and the other end and support body (41) install.
8. vertical slotter according to claim 1 is characterized in that described vertical jacking cylinder (43) has 2 groups, lays respectively at the both sides of milling case (5), and one of which end and milling frame (54) install, and the other end and support body (41) install.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201708404U CN202108064U (en) | 2011-05-26 | 2011-05-26 | Vertical slot milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201708404U CN202108064U (en) | 2011-05-26 | 2011-05-26 | Vertical slot milling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202108064U true CN202108064U (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201708404U Expired - Lifetime CN202108064U (en) | 2011-05-26 | 2011-05-26 | Vertical slot milling machine |
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| CN (1) | CN202108064U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243763A (en) * | 2013-05-10 | 2013-08-14 | 上海工程机械厂有限公司 | Rectification mechanism of slotting machine |
| CN103556622A (en) * | 2013-11-04 | 2014-02-05 | 上海金泰工程机械有限公司 | Wall mending device for continuous wall |
| CN104018537A (en) * | 2014-05-30 | 2014-09-03 | 徐工集团工程机械股份有限公司 | Slot milling machine and correction detection method of mill support of slot milling machine |
| CN109252558A (en) * | 2017-07-13 | 2019-01-22 | 上海广大基础工程有限公司 | A kind of saw chain formula slotter cutting mechanism |
| CN109252556A (en) * | 2017-07-13 | 2019-01-22 | 上海工程机械厂有限公司 | A kind of super strong type saw chain formula slotter cutting mechanism |
| CN109537660A (en) * | 2019-01-04 | 2019-03-29 | 重庆长征重工有限责任公司 | Bar shaped deep trouth foundation excavation equipment |
| GB2578483A (en) * | 2018-10-29 | 2020-05-13 | Mastenbroek Ltd | Trenching apparatus and a method of trenching |
| CN117926875A (en) * | 2024-03-21 | 2024-04-26 | 徐州景安重工机械制造有限公司 | Groove milling system |
-
2011
- 2011-05-26 CN CN2011201708404U patent/CN202108064U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243763A (en) * | 2013-05-10 | 2013-08-14 | 上海工程机械厂有限公司 | Rectification mechanism of slotting machine |
| CN103556622A (en) * | 2013-11-04 | 2014-02-05 | 上海金泰工程机械有限公司 | Wall mending device for continuous wall |
| CN103556622B (en) * | 2013-11-04 | 2018-04-10 | 上海金泰工程机械有限公司 | Diaphragm wall repaiies wall device |
| CN104018537A (en) * | 2014-05-30 | 2014-09-03 | 徐工集团工程机械股份有限公司 | Slot milling machine and correction detection method of mill support of slot milling machine |
| CN104018537B (en) * | 2014-05-30 | 2016-02-24 | 徐工集团工程机械股份有限公司 | The correction detection method of the carriage arbor of slotter and slotter |
| CN109252556A (en) * | 2017-07-13 | 2019-01-22 | 上海工程机械厂有限公司 | A kind of super strong type saw chain formula slotter cutting mechanism |
| CN109252558A (en) * | 2017-07-13 | 2019-01-22 | 上海广大基础工程有限公司 | A kind of saw chain formula slotter cutting mechanism |
| CN109252556B (en) * | 2017-07-13 | 2023-10-20 | 上海工程机械厂有限公司 | Cutting mechanism of super-strong saw chain type slot milling machine |
| GB2578483A (en) * | 2018-10-29 | 2020-05-13 | Mastenbroek Ltd | Trenching apparatus and a method of trenching |
| GB2578483B (en) * | 2018-10-29 | 2022-10-26 | Mastenbroek Ltd | Trenching apparatus and a method of trenching |
| CN109537660A (en) * | 2019-01-04 | 2019-03-29 | 重庆长征重工有限责任公司 | Bar shaped deep trouth foundation excavation equipment |
| CN117926875A (en) * | 2024-03-21 | 2024-04-26 | 徐州景安重工机械制造有限公司 | Groove milling system |
| CN117926875B (en) * | 2024-03-21 | 2024-06-14 | 徐州景安重工机械制造有限公司 | Groove milling system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20141008 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |