CN110485415A - Cement-soil mixing pile machine drag chain structure - Google Patents
Cement-soil mixing pile machine drag chain structure Download PDFInfo
- Publication number
- CN110485415A CN110485415A CN201810446163.0A CN201810446163A CN110485415A CN 110485415 A CN110485415 A CN 110485415A CN 201810446163 A CN201810446163 A CN 201810446163A CN 110485415 A CN110485415 A CN 110485415A
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- drag chain
- plate
- chain plate
- cement
- clamping position
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a kind of cement-soil mixing pile machine drag chain structures, hold assembly (X) it is characterized by comprising spaced two chains (1) in left and right and the multiple groups being fixed between two chains (1) to the different pipelines of more of firm clamping simultaneously, each hold assembly (X) are arranged along the length direction interval of chain (1).It is fixed between two chains while the hold assembly of the different pipelines of firm more of clamping, pipeline each in this way can be moved together with chain, and the end of each pipeline and chain is connect with wellbore part, pipeline and chain can follow wellbore part to move down together, simultaneously, spaced two chains in left and right are convenient to be connect with sprocket wheel, and sprocket wheel can then be driven by hoisting mechanism and be rotated, and then realize the folding and unfolding of pipeline, and pipeline and chain is allowed to be in certain tensioning state always, avoid pipeline and chain from loosely causing to wind.
Description
Technical field
The present invention relates to a kind of cement-soil mixing pile machine for pile foundation construction more particularly to a kind of cement-soil mixing pile machines
Use drag chain structure.
Background technique
Cement mixing pile foundation is a kind of effective treatment of soft foundation form, is especially carrying out reinforcing and foundation pit branch to soft layer
When shield, usually use cement slurry and soil shear failure method, formed Soil-cement pile body, thus make soft foundation intensity and
Sealing is greatly improved.It is usually using cement as the host agent of curing agent, using cement-soil mixing pile machine by cement jet people
Weak soil and curing agent are simultaneously forced mix on the spot by the soil body, are made cement and soil that a series of physical, chemical reaction occur, are condensed into it
For with globality, water stability is good and the cement stabilization body of higher-strength, being formed with subsoil has the excellent of certain bearing capacity
Then stake is squeezed into processed soft base stratum with piling machine again by matter composite foundation.
Such as application No. is Chinese invention patent one kind five of CN201210014492.0 (notification number CN102535450A)
Axis cement-soil mixing pile device and construction method, disclose such a structure, including walking and crawler type host, hoist engine,
Guide rod, wirerope, stock inlet, power head, gearbox, speed reducer, drilling rod, intermediate support frame, lower support frame, drilling rod winged,
Anchor ear, Multifunctional drill, mouth spray, backstage cement slurry stirring system, the hoist engine and guide rod are fixed on host, described
Power head by wirerope connection guide top pulley, wirerope drives power head oscilaltion, and the power head is successively
Five drilling rods are connected with speed reducer by gearbox, intermediate support frame is equipped in the middle part of five drilling rods, lower part is equipped with lower support frame,
Each drilling rod lower end is respectively connected with drilling rod winged, and the drilling rod winged is equipped with anchor ear, and drilling rod lower end winged connects multi-functional drill
Head, Multifunctional drill are equipped with mouth spray.
Chinese invention patent one kind such as Patent No. 200910069171.9 (notification number CN102535450A) is two-way
Cement-soil mixing pile machine discloses such a structure, including headstock, inside and outside drilling rod and bidirectional rotation drill bit, it is characterised in that
Headstock only includes a motor and a set of transmission system, and transmission system includes retarder, shaft coupling, mud connector and cabinet；
The interior drilling rod concentric locking collar within outer drilling rod, fix with box baseplate, is not able to rotate, under outer drilling rod by outer drilling rod upper surface
End face is fixedly connected with the shell gland of bidirectional rotation drill bit；Interior drilling rod lower end surface is connected with the upper surface of interior drill bit；Interior brill
The top fixing sleeve of head is equipped with upper bevel gear, and upper bevel gear engages with idle wheel；Idle wheel is mounted on on trunnion axis, and trunnion axis is fixed
Portion in the housing, interior drill bit are passed perpendicularly through from the through-hole among trunnion axis；The idle wheel simultaneously be sleeved on interior drill bit lower part
Lower bevel gear engagement；The upper bevel gear, idle wheel and lower bevel gear constitute fixed shaft gear train transmission；Radial equipartition on inside and outside drill bit
It is welded with 2 or 2 or more blades.
Its force control section of conventional soil cement mixing pile machine is divided into ground top, and the stroke of power transmitting is longer, easily goes out
Existing drilling rod can not bore, and drilling difficulty is big, the problem of stability difference, oil pipe involved in this kind of conventional piles machine and electric wire also equal position
In on ground, the applicant's application has a kind of more advanced soil body that type chain broaching is sufficiently stirred, including is located at telescopic
Setting dynamical system in drilling rod lower part can enter soil, can rotate in water and circumferentially the cut vector of head and the tail connection, cut vector
Surface have bulge-structure.Cut vector includes ring chain, and the cut vector includes ring chain, the protrusion
Structure includes the surface that the cutting teeth being fixed on ring chain and cutting teeth protrude from ring chain.
It is set in cut vector because of dynamical system and enters in soil with it, therefore to guarantee oil pipe, mud tube or mortar pipe
And conducting wire will enter in cut vector and downlink therewith, how to ensure oil pipe, mud tube or mortar pipe and conducting wire with cutting
It is those skilled in the art that carrier downlink, oil pipe, mud tube or mortar pipe and conducting wire will not destroy during uplink and downlink
Member's technical issues that need to address.
Summary of the invention
It is a kind of a variety of to fixation the technical problem to be solved by the present invention is to be provided for above-mentioned state of the art
Pipeline simultaneously can be with the cement-soil mixing pile machine drag chain structure of wellbore part downlink and uplink.
The technical scheme of the invention to solve the technical problem is: a kind of cement-soil mixing pile machine drag chain knot
Structure, it is spaced including left and right and two chains of movement and two can be fixed on by the chain wheel drive with driving mechanism
Hold assembly of the multiple groups to the different pipelines of more of firm clamping simultaneously between root chain, length of each hold assembly along chain
The setting of direction interval.
As an improvement, above-mentioned hold assembly include between the upper and lower every to the upper drag chain plate and lower drag chain plate set, upper drag chain plate and
Chain of the left and right ends of lower drag chain plate respectively at corresponding side is fixed, and multiple upper grooves, lower drag chain plate are provided on upper drag chain plate
On be provided with the lower groove that multiple upper grooves are correspondingly arranged, the clamping that pipeline is fixed is formed after upper groove and lower groove pairing
Position.The hold assembly, only need to be by upper and lower drag chain plate by between the upper and lower when to the upper drag chain plate and lower drag chain board group set at, assembling
It is buckled on pipeline and again fixes upper and lower drag chain plate and chain, it is easy to assembly, conducive to the shape and thickness for being directed to different pipelines
The quantity of shape adaptation that can targetedly to groove, groove can also carry out adaptability allotment according to the quantity of pipeline.
It is further improved, one or more is additionally provided in the middle part of above-mentioned upper drag chain plate and lower drag chain plate to make upper drag chain plate
The latch fitting component bringing together with lower drag chain plate, locking member are set between adjacent two clamping position.The setting of lock members can make
What drag chain plate was more firm above and below clasps pipeline, while front and back can also be facilitated to adjust the position of pipeline, connects in each hold assembly
Afterwards, not tighten locking member first, such pipeline can front and back be adjusted, in place after, then with locking member by upper and lower drag chain
Plate locking.
Alternatively, above-mentioned latch fitting component is lock-screw, is provided with perforation on upper drag chain plate, lower drag chain plate is provided with and perforates
The lower threaded hole being correspondingly arranged, the lock-screw are threadedly coupled after passing through perforation with lower threaded hole.
Certainly, above-mentioned latch fitting component can also be screw bolt and nut, be provided on upper drag chain plate and lower drag chain plate one-to-one
Perforation, the bolt are connect after successively going up the perforation on drag chain plate and lower drag chain plate with the nut thread.
It is further improved, above-mentioned hold assembly further includes two pieces of intermediate plates, and one of intermediate plate is fixed on a chain
Inner sidewall, another piece of intermediate plate be fixed on the inner sidewall of another chain, and the left and right ends of the upper drag chain plate are fixed respectively
In the top surface of two pieces of intermediate plates, the left and right ends of the lower drag chain plate are separately fixed at the bottom surface of two pieces of intermediate plates.Because of pipeline
Diameter is thicker, and the left and right ends of such as upper and lower drag chain plate are leaned on too close, and upper and lower drag chain plate is fixed pipeline, can allow upper and lower
The deformation of drag chain plate is excessive, and for this defect, we provide the setting of intermediate plate so that the left and right ends of upper and lower drag chain plate are formed
One fixed spacing, be unlikely to lean on is too close, and upper and lower drag chain plate is unlikely to deform excessive under the premise of lockking pipeline.In addition intermediate plate
Setting, fixed to upper and lower drag chain plate provide suitable fixed position, be affixed directly on chain compared to upper and lower drag chain plate, Gu
It is fixed more convenient.
For convenience of fixing the left and right ends of upper and lower drag chain plate with intermediate plate, it is further improved, a left side for above-mentioned upper drag chain plate
Right two sides are welded with upper mounted plate, and bottom plate is welded at left and right sides of lower drag chain plate, and fixed plate is logical
The top surface that screw is fixed on intermediate plate is crossed, the bottom plate is fixed by screws in the bottom surface of intermediate plate.
Preferably, being followed successively by the first clamping position, the second clamping position, third folder from left to right there are four above-mentioned clamping positions
Hold position and the 4th clamping position, the first clamping position to clamp electric wire and drain mast, the second clamping position to clamp oil inlet pipe,
Third clamps position to clamp mud tube or mortar pipe, and the 4th clamping position is to clamp oil return pipe.
Preferably, above-mentioned upper drag chain plate and lower drag chain plate are that flexible metallic plate punching is formed.
It is set between upper and lower drag chain plate for convenience of by locking member, passes through between adjacent two upper groove in above-mentioned upper drag chain plate
Upper planar section connects, and is connected between adjacent two lower groove by lower plane section in the lower drag chain plate, the latch fitting component setting
Between opposite upper planar section and lower plane section.
Compared with the prior art, the advantages of the present invention are as follows: be fixed between two chains and meanwhile it is firm clamping more
The hold assembly of different pipelines, pipeline each in this way can be moved together with chain, and the end and bore portion of each pipeline and chain
Part connection, pipeline and chain can follow wellbore part to move down together, meanwhile, the spaced two chains convenience in left and right and chain
Wheel connection, and sprocket wheel can then be driven by hoisting mechanism and be rotated, and then realize the folding and unfolding of pipeline, and pipeline and chain is allowed to locate always
In certain tensioning state, pipeline and chain is avoided loosely to cause to wind, realizing each pipeline can advance with chain is gradually lower
Enter the soil body perhaps uplink left from the soil body avoid each pipeline up and down or downlink during be pulled off.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of inventive embodiments；
Fig. 2 is the cross-sectional view of inventive embodiments；
Fig. 3 is the front view of upper drag chain plate in inventive embodiments；
Fig. 4 is the top view of upper drag chain plate in inventive embodiments；
Fig. 5 is the front view of lower drag chain plate in inventive embodiments；
Fig. 6 is the top view of lower drag chain plate in inventive embodiments；
Fig. 7 is the top view of intermediate plate in inventive embodiments；
Fig. 8 is the cross-sectional view of intermediate plate in inventive embodiments.
Appended drawing reference is as follows: X- hold assembly；Y- planar section；1- chain；The upper drag chain plate of 2-；21- upper groove；
22- perforation；Drag chain plate under 3-；31- lower groove；32- threaded hole；4- locking member；5- intermediate plate；6-upper fixations
Plate；7- bottom plate；8- screw；91- first clamps position；92- second clamps position；93- third clamps position；94- the 4th
Clamp position.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown, being a preferred embodiment of the present invention.
A kind of cement-soil mixing pile machine drag chain structure, including spaced two chains 1 in left and right and it is fixed on two
Hold assembly X of the multiple groups to the different pipelines of more of firm clamping simultaneously between chain 1, each hold assembly X is along chain 1
The setting of length direction interval.
Hold assembly X includes between the upper and lower every to the upper drag chain plate 2 and lower drag chain plate 3 set, upper drag chain plate 2 and lower drag chain plate 3
It is formed for flexible metallic plate punching.Chain of the left and right ends of upper drag chain plate 2 and lower drag chain plate 3 respectively at corresponding side
Item 1 is fixed, is provided with multiple upper grooves 21 on upper drag chain plate 2, be provided on lower drag chain plate 3 multiple upper grooves 21 be correspondingly arranged it is recessed
Slot 31 is connected between adjacent two upper groove 21 by upper planar section 23 in upper drag chain plate 2, adjacent two lower groove in lower drag chain plate 3
It is connected between 31 by lower plane section 33, forms the clamping position that pipeline is fixed after upper groove 21 and 31 pairing of lower groove
91,92,93,94.Upper groove 21 and lower groove 31 are arc groove.
There are four clamping positions 91,92,93,94 in the present embodiment, is followed successively by the first clamping position 91, second folder from left to right
Position 92, third clamping position 93 and the 4th clamping position 94 are held, the first clamping position 91 is to clamp electric wire and drain mast, the second folder
Position 92 is held to clamp oil inlet pipe, third clamping position 93 to clamp mud tube or mortar pipe, the 4th clamping position 94 is to press from both sides
Hold oil return pipe.
The middle part of upper drag chain plate 2 and lower drag chain plate 3 is additionally provided with one or more to make upper drag chain plate 2 and lower drag chain plate 3
Latch fitting component 4 bringing together, locking member 4 are set between adjacent two clamping position 91,92,93,94.Locking in the present embodiment
There are two components 4, is located between the second clamping position 92 and third clamping position 93 and third clamping position 93 and the 4th clamps
Between position 94, and latch fitting component 4 is arranged between opposite upper planar section 23 and lower plane section 33.
Latch fitting component 4 in the present embodiment is lock-screw, is provided with perforation 22 on the upper planar section 23 of upper drag chain plate 2, under
The lower plane section 33 of drag chain plate 3 is provided with the lower threaded hole 32 being correspondingly arranged with perforation 22, and lock-screw is after perforation 22 under
Threaded hole 32 is threadedly coupled.
Certain latch fitting component 4 can also be screw bolt and nut, be provided on upper drag chain plate 2 and lower drag chain plate 3 and wear correspondingly
Hole, the bolt are connect after successively going up the perforation on drag chain plate and lower drag chain plate with the nut thread.
It is fixed for convenience of hold assembly X with chain, hold assembly X further includes two pieces of intermediate plates 5, one of intermediate plate 5
It is fixed on the inner sidewall of a chain 1, another piece of intermediate plate 5 is fixed on the inner sidewall of another chain 1, the upper drag chain plate 2
Left and right ends be separately fixed at the top surfaces of two pieces of intermediate plates 5, the left and right ends of lower drag chain plate 3 are separately fixed at two pieces of intermediate plates
5 bottom surface.The left and right sides of upper drag chain plate 2 is welded with upper mounted plate 6, and the left and right sides of lower drag chain plate 3 is welded with
Bottom plate 7, upper mounted plate 6 are fixed on the top surface of intermediate plate 5 by screw 8, and bottom plate 7 is fixed on centre by screw 8
The bottom surface of plate 5.
It is fixed between two chains 1 while the hold assembly X of the different pipelines of firm more of clamping, pipeline each in this way can
To move together with chain 1, and the end of each pipeline and chain 1 is connect with wellbore part, and pipeline and chain 1 can follow drilling
Component moves down together, meanwhile, spaced two chains 1 in left and right are convenient to be connect with sprocket wheel, and sprocket wheel can then pass through hoist engine
Structure driving rotation, and then realize the folding and unfolding of pipeline, and allow pipeline and chain 1 always in certain tensioning state, avoid pipeline
Loosely cause to wind with chain 1.
It should be noted that term " on ", "lower", "inner", "outside", "left", "right" etc. refer in the description of the present embodiment
The orientation or positional relationship shown is to be based on the orientation or positional relationship shown in the drawings, it is only for convenient for description the present invention and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore be not considered as limiting the invention.Term " installation ", " connection ", " connected " shall be understood in a broad sense, example
Such as, it may be fixed connection or may be dismantle connection, or integral connection；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Although the preferred embodiment of the present invention has been described in detail above, it is to be clearly understood that for this field
Technical staff for, the invention may be variously modified and varied.Done within the spirit and principles of the present invention
What modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cement-soil mixing pile machine drag chain structure, it is characterised in that: it is spaced including left and right and can by with drive
The chain wheel drive of motivation structure and two chains (1) of movement and the multiple groups being fixed between two chains (1) are to firm simultaneously
The hold assembly (X) of more different pipelines is clamped, each hold assembly (X) is arranged along the length direction interval of chain (1).
2. cement-soil mixing pile machine drag chain structure according to claim 1, it is characterised in that: the hold assembly (X)
Including between the upper and lower every to the upper drag chain plate (2) and lower drag chain plate (3) set, the left and right ends of upper drag chain plate (2) and lower drag chain plate (3)
Chain (1) respectively at corresponding side is fixed, is provided with multiple upper grooves (21) on upper drag chain plate (2), is provided on lower drag chain plate (3)
It is formed after the lower groove (31) that multiple upper grooves (21) are correspondingly arranged, upper groove (21) and lower groove (31) pairing and pipeline is carried out
Fixed clamping position (91,92,93,94).
3. cement-soil mixing pile machine drag chain structure according to claim 2, it is characterised in that: the upper drag chain plate (2)
It is one or more to make upper drag chain plate (2) and lower drag chain plate (3) lock bringing together with being additionally provided in the middle part of lower drag chain plate (3)
Part component (4), locking member (4) are set between adjacent two clamping position (91,92,93,94).
4. cement-soil mixing pile machine drag chain structure according to claim 3, it is characterised in that: the latch fitting component (4)
It for lock-screw, is provided with perforation (22) on upper drag chain plate (2), lower drag chain plate (3) is provided with the lower spiral shell being correspondingly arranged with perforation (22)
Pit (32), the lock-screw pass through perforation (22) and are threadedly coupled afterwards with lower threaded hole (32).
5. cement-soil mixing pile machine drag chain structure according to claim 3, it is characterised in that: the latch fitting component (4)
For screw bolt and nut, one-to-one perforation is provided on upper drag chain plate and lower drag chain plate, the bolt successively goes up drag chain plate under
It is connect after perforation on drag chain plate with the nut thread.
6. cement-soil mixing pile machine drag chain structure according to claim 2, it is characterised in that: the hold assembly (X)
It further include two pieces of intermediate plates (5), one of intermediate plate (5) is fixed on the inner sidewall of a chain (1), another piece of intermediate plate
(5) it is fixed on the inner sidewall of another chain (1), the left and right ends of the upper drag chain plate (2) are separately fixed at two pieces of intermediate plates
(5) left and right ends of top surface, the lower drag chain plate (3) are separately fixed at the bottom surface of two pieces of intermediate plates (5).
7. cement-soil mixing pile machine drag chain structure according to claim 6, it is characterised in that: the upper drag chain plate (2)
The left and right sides be welded with upper mounted plate (6), be welded with bottom plate (7), institute at left and right sides of lower drag chain plate (3)
The top surface that upper mounted plate (6) are fixed on intermediate plate (5) by screw (8) is stated, the bottom plate (7) is fixed by screw (8)
In the bottom surface of intermediate plate (5).
8. cement-soil mixing pile machine drag chain structure according to claim 2, it is characterised in that: the clamping position (91,
92,93,94) there are four, be followed successively by from left to right the first clamping position (91), the second clamping position (92), third clamping position (93) and
4th clamping position (94), first clamping position (91) is to clamp electric wire and drain mast, and the second clamping position (92) is to clamp
Oil inlet pipe, third clamping position (93) are to clamp mud tube or mortar pipe, and the 4th clamping position (94) is to clamp oil return pipe.
9. cement-soil mixing pile machine drag chain structure according to claim 3, it is characterised in that: the upper drag chain plate (2)
It is formed with lower drag chain plate (3) by flexible metallic plate punching.
10. cement-soil mixing pile machine drag chain structure according to claim 3, it is characterised in that: the upper drag chain plate (2)
In connected by upper planar section (23) between adjacent two upper groove (21), adjacent two lower groove (31) in the lower drag chain plate (3)
Between connected by lower plane section (33), opposite upper planar section (23) and lower plane section is arranged in the latch fitting component (4)
(33) between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446163.0A CN110485415A (en) | 2018-05-11 | 2018-05-11 | Cement-soil mixing pile machine drag chain structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810446163.0A CN110485415A (en) | 2018-05-11 | 2018-05-11 | Cement-soil mixing pile machine drag chain structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110485415A true CN110485415A (en) | 2019-11-22 |
Family
ID=68543229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810446163.0A Pending CN110485415A (en) | 2018-05-11 | 2018-05-11 | Cement-soil mixing pile machine drag chain structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN110485415A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202992024U (en) * | 2012-12-17 | 2013-06-12 | 三明市宏基塑胶有限公司 | Separation-resistant high-strength drag chain |
| CN204664303U (en) * | 2015-04-29 | 2015-09-23 | 东莞市巴顿贝塔机械设备有限公司 | A kind of drag chain structure |
| CN205350203U (en) * | 2015-12-21 | 2016-06-29 | 马鞍山钢铁股份有限公司 | Heavy load tow chain |
| CN205423693U (en) * | 2015-12-21 | 2016-08-03 | 马鞍山钢铁股份有限公司 | Convenient heavily loaded tow chain |
| US9570895B2 (en) * | 2014-11-21 | 2017-02-14 | Hon Hai Precision Industry Co., Ltd. | Cable drag chain and cable drag chain assembly |
-
2018
- 2018-05-11 CN CN201810446163.0A patent/CN110485415A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202992024U (en) * | 2012-12-17 | 2013-06-12 | 三明市宏基塑胶有限公司 | Separation-resistant high-strength drag chain |
| US9570895B2 (en) * | 2014-11-21 | 2017-02-14 | Hon Hai Precision Industry Co., Ltd. | Cable drag chain and cable drag chain assembly |
| CN204664303U (en) * | 2015-04-29 | 2015-09-23 | 东莞市巴顿贝塔机械设备有限公司 | A kind of drag chain structure |
| CN205350203U (en) * | 2015-12-21 | 2016-06-29 | 马鞍山钢铁股份有限公司 | Heavy load tow chain |
| CN205423693U (en) * | 2015-12-21 | 2016-08-03 | 马鞍山钢铁股份有限公司 | Convenient heavily loaded tow chain |
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Application publication date: 20191122 |
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