CN114837430A - Method for installing large-scale steel structure limited space pin shaft - Google Patents
Method for installing large-scale steel structure limited space pin shaft Download PDFInfo
- Publication number
- CN114837430A CN114837430A CN202210469176.6A CN202210469176A CN114837430A CN 114837430 A CN114837430 A CN 114837430A CN 202210469176 A CN202210469176 A CN 202210469176A CN 114837430 A CN114837430 A CN 114837430A
- Authority
- CN
- China
- Prior art keywords
- pin shaft
- pin
- chain
- round
- steel structure
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 70
- 239000010959 steel Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a method for installing a large steel structure pin shaft in a limited space, which specifically comprises the following steps: s1: manufacturing a guide element and a mounting element; s2: arranging an auxiliary plate on the steel structure at a position close to the pin holes, forming through holes in the auxiliary plate, and aligning the through holes with the pin holes; s3: arranging a pulley mechanism on the auxiliary plate, so that a sliding groove on one side of a pulley in the pulley mechanism is aligned with the through hole and the pin hole; s4: hoisting the mounting element to a position close to the pin hole, and inserting the small-diameter end of the mounting element into the pin hole; s5: preparing two chain blocks, namely a first chain block and a second chain block, wherein the hoisting chain block of the first chain block penetrates into the pin hole to be connected with the small-diameter end of the mounting element, and the hoisting chain block of the second chain block is connected with the large-diameter end of the mounting element; s6: pulling the hand chain of the first chain block to pull the mounting element into the pin hole; the invention can very conveniently realize the installation of the large pin shaft of the large steel structure in a high-altitude limited space.
Description
Technical Field
The invention relates to the field of installation of a steel structure pin shaft, in particular to a method for installing a large steel structure pin shaft in a limited space.
Background
With the development of society, especially the continuous development of science and technology, the rapid development of social productivity is greatly promoted; especially, the rapid rise of steel structure buildings injects new vitality for the high-speed development of the building industry.
The pin shaft connection in the steel structure is a node form which is formed by connecting a plurality of lug plates connected with a plurality of adjacent members by using pin shafts respectively, and is a common connection mode in the steel structure. The size of the pin shaft is positively correlated with the force which the pin shaft needs to bear. In the connection structure of the large-scale steel structure pin shaft, the large-scale pin shaft is generally required to be used, and the large-scale pin shaft cannot be directly installed by manual holding due to large weight. Moreover, due to the space limitation of high-altitude operation, part of machinery cannot be used, and the large pin shaft is very troublesome to mount. Therefore, how to simply and conveniently carry out the high-altitude installation of the large pin shaft with larger weight in the large steel structure and reduce the labor cost and the time cost is a topic worthy of research.
Disclosure of Invention
The invention aims to provide a method for installing a large-scale steel structure pin shaft in a limited space, which can simply and conveniently carry out high-altitude installation of a large-scale pin shaft with larger weight in the large-scale steel structure and effectively reduce the labor cost and the time cost for installing the large-scale pin shaft.
The invention is realized by the following steps: a method for installing a large steel structure pin shaft in a limited space specifically comprises the following steps:
s1: manufacturing a guide element and a mounting element, wherein the guide element is a round pipe or a round steel, the outer diameter of the round pipe is smaller than the diameter of the pin shaft, the diameter of the round steel is smaller than the diameter of the pin shaft, the guide element is connected with one end of the pin shaft, the guide element and the pin shaft share the same central axis, and the guide element and the pin shaft are combined to form the mounting element;
s2: arranging an auxiliary plate on the steel structure at a position close to the pin holes, forming through holes in the auxiliary plate, and aligning the through holes with the pin holes;
s3: arranging a pulley mechanism on the auxiliary plate, so that a sliding groove on one side of a pulley in the pulley mechanism is aligned with the through hole and the pin hole;
s4: hoisting the mounting element to a position close to the pin hole, and inserting the small-diameter end of the mounting element into the pin hole;
s5: preparing two inverted chains, namely a first inverted chain and a second inverted chain, wherein the first inverted chain and the second inverted chain are connected with a steel structure and are respectively positioned at two sides of a pin hole;
s6: the hand chain of pulling first chain block draws the installation component to the pinhole, simultaneously, constantly stimulates the hand chain of No. two chain blocks, constantly adjusts the high position of installation component major diameter end for the concentricity of installation component and pinhole keeps unanimous, can install the round pin axle to in the pinhole.
The guide element is a round pipe, and the round pipe is connected with the pin shaft in a welding mode.
The one end internal weld that the round pin axle was kept away from to the pipe has the plectane, be provided with the rotatory knot No. one on the plectane, the terminal jack-up couple of jack-up chain block of chain block links to each other with the rotatory knot No. one.
One end of the pin shaft, which is far away from the round pipe, is provided with a second rotary buckle, and a hoisting hook at the tail end of a hoisting chain block of the second chain block is connected with the second rotary buckle.
The guide element is made of round steel, one end of the round steel, which is connected with the pin shaft, is provided with a connecting screw rod part, and the connecting screw rod part and the round steel share the same central axis; the round pin axle is provided with the round pin axle and links to each other the one end with the round steel and is provided with the screw hole, the screw hole shares the central axis with the round pin axle, the screw thread of the connecting screw rod portion of round steel is installed in the screw hole of round pin axle.
The round steel is kept away from the one end of round pin axle and is provided with rotatory knot No. three, the terminal jack-up couple of jack-up chain block of chain block links to each other with rotatory knot No. three.
One end of the pin shaft, which is far away from the round steel, is provided with a fourth rotating buckle, and a hoisting hook at the tail end of the hoisting chain block of the second chain block is connected with the fourth rotating buckle.
Has the positive and beneficial effects that: 1. the invention can conveniently realize the installation of the large pin shaft of the large steel structure in the high-altitude limited space, and solves the problem of inconvenient installation of the large pin shaft of the large steel structure because large machinery cannot be used in the high-altitude limited space. 2. According to the invention, an operation platform is not required to be arranged, so that the labor cost and the time cost for installing the large pin shaft in the high-altitude limited space are effectively reduced. 3. The tool used by the invention is either a common tool or a tool which has a simple structure and is very conveniently manufactured by using common materials, so that the invention is easy to realize.
Drawings
FIG. 1 is a schematic view of the construction of the present invention;
FIG. 2 is a schematic structural view of a mounting member according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of a guide member according to embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of a mounting member according to embodiment 2 of the present invention;
fig. 5 is a schematic structural view of a guide member according to embodiment 2 of the present invention.
In the figure, the following steps are carried out: the device comprises a circular tube 1, round steel 2, a connecting screw rod part 201, a pin shaft 3, an auxiliary plate 4, a pulley mechanism 5, a first inverted chain 6, a second inverted chain 7, a circular plate 8, a first rotary buckle 9, a second rotary buckle 10, a third rotary buckle 11 and a fourth rotary buckle 12.
Detailed Description
The following further description is made with reference to the accompanying drawings and specific examples:
example 1
As shown in fig. 1, 2 and 3, the method for installing the large steel structure pin shaft in the limited space specifically comprises the following steps:
s1: manufacturing a guide element and a mounting element, wherein the guide element is a round tube 1, the outer diameter of the round tube 1 is smaller than the diameter of the pin shaft 3, the difference value is 2-4cm, two ends of the round tube 1 are polished to be flat, the round tube 1 is placed at one end of the pin shaft 3, the round tube 1 and the pin shaft 3 share the central axis, and then the round tube 1 and the pin shaft 3 are welded together to form the mounting element. A circular plate 8 is welded inside one end, far away from the pin shaft 3, of the circular tube 1, a first rotating buckle 9 is installed on the circular plate 8, and a second rotating buckle 10 is installed at one end, far away from the circular tube 1, of the pin shaft 3.
S2: and welding an auxiliary plate 4 at a position, close to the pin holes, on the steel structure, wherein the auxiliary plate 4 is parallel to the lug plate provided with the pin holes, and a through hole is formed in the auxiliary plate 4 and is aligned with the pin holes.
S3: the auxiliary plate 4 is provided with a pulley mechanism 5, the pulley mechanism 5 comprises two supporting rods, an installation shaft and a pulley, the two supporting rods are welded on the auxiliary plate 4, the installation shaft is arranged on the two supporting rods, the pulley is arranged on the installation shaft, and the position of the pulley is that a sliding groove on one side of the pulley is aligned with the through hole and the pin hole.
S4: and hoisting the mounting element to a position close to the pin hole by using a crane, and plugging the small-diameter end of the mounting element into the pin hole from the side far away from the auxiliary plate 4 to pre-mount the pin shaft 3.
S5: preparing two chain blocks, namely a chain block, a first chain block 6 and a second chain block 7 respectively, wherein the first chain block 6 and the second chain block 7 are connected to a steel structure and are respectively positioned on two sides of the pin hole. The first inverted chain 6 is located on one side of the pin hole close to the auxiliary plate 4, and the second inverted chain 7 is located on one side of the pin hole far away from the auxiliary plate 4. The hoisting chain block of the first chain block 6 sequentially passes through the sliding groove of the pulley and the through hole of the auxiliary plate 4 and penetrates into the pin hole, and the hoisting hook at the tail end of the hoisting chain block of the first chain block 6 is hung on the first rotating buckle 9. And hanging a hoisting hook at the tail end of the hoisting chain block of the second chain block 7 on the second rotating buckle 10.
S6: and pulling the hand-pulled chain of the first chain block 6 to pull the installation element consisting of the circular tube 1 and the pin shaft 3 into the pin hole. Meanwhile, the hand-pulling chain of the second chain block 7 is continuously pulled, the height position of one end, away from the circular tube 1, of the pin shaft 3 is continuously adjusted, the concentricity of the pin shaft 3 and the pin hole is continuously kept consistent, and therefore the pin shaft 3 can be conveniently installed in the pin hole.
After the installation is finished, the round tube 1 is cut off from the pin shaft 3 by using a handheld angle grinder, and the auxiliary plate 4 is cut off from a steel structure.
Example 2
As shown in fig. 1, 4 and 5, the method for installing the large steel structure pin shaft in the limited space specifically comprises the following steps:
s1: and manufacturing a guide element and a mounting element, wherein the guide element is made of round steel 2, the outer diameter of the round steel 2 is smaller than the diameter of the pin shaft 3, and the difference value is 2-4 cm. One end of round steel 2 is provided with connecting screw portion 201, connecting screw portion 201 and round steel 2 coaxial line, and No. three rotatory knots 11 are installed to the other end of round steel 2. One end of the pin shaft 3 is provided with a threaded hole, the threaded hole and the pin shaft 3 share the central axis, the connecting screw rod part 201 of the round steel 2 is installed in the threaded hole of the pin shaft 3 in a threaded mode, then the round steel 2 and the pin shaft 3 are combined into an installation element, and the round steel 2 and the pin shaft 3 share the central axis. The other end of the pin shaft 3 is provided with a number four rotating buckle 12.
S2: and welding an auxiliary plate 4 at a position, close to the pin holes, on the steel structure, wherein the auxiliary plate 4 is parallel to the lug plate provided with the pin holes, and a through hole is formed in the auxiliary plate 4 and is aligned with the pin holes.
S3: the auxiliary plate 4 is provided with a pulley mechanism 5, the pulley mechanism 5 comprises two supporting rods, an installation shaft and a pulley, the two supporting rods are welded on the auxiliary plate 4, the installation shaft is arranged on the two supporting rods, the pulley is arranged on the installation shaft, and the position of the pulley is that a sliding groove on one side of the pulley is aligned with the through hole and the pin hole.
S4: and hoisting the mounting element to a position close to the pin hole by using a crane, and plugging the small-diameter end of the mounting element into the pin hole from the side far away from the auxiliary plate 4 to pre-mount the pin shaft 3.
S5: preparing two chain blocks, namely a chain block, a first chain block 6 and a second chain block 7 respectively, wherein the first chain block 6 and the second chain block 7 are connected to a steel structure and are respectively positioned on two sides of the pin hole. The first inverted chain 6 is located on one side of the pin hole close to the auxiliary plate 4, and the second inverted chain 7 is located on one side of the pin hole far away from the auxiliary plate 4. The hoisting chain block of the first chain block 6 sequentially passes through the sliding groove of the pulley and the through hole of the auxiliary plate 4 and penetrates into the pin hole, and the hoisting hook at the tail end of the hoisting chain block of the first chain block 6 is hung on the third rotating buckle 11. And hanging a hoisting hook at the tail end of the hoisting chain block of the second chain block 7 on the fourth rotating buckle 12.
S6: and pulling the hand chain of the first chain block 6 to pull the mounting element consisting of the round steel 2 and the pin shaft 3 into the pin hole. Meanwhile, the hand-pulling chain of the second chain block 7 is continuously pulled, the height position of one end, away from the round steel 2, of the pin shaft 3 is continuously adjusted, the concentricity of the pin shaft 3 and the pin hole is continuously kept consistent, and therefore the pin shaft 3 can be conveniently installed in the pin hole.
After the installation is finished, the round steel 2 can be removed from the pin shaft 3 by twisting the round steel 2, and the auxiliary plate 4 is cut off from the steel structure by using an angle grinder.
The working principle of the invention is as follows: the concentric circular tube 1 or the concentric round steel 2 with the diameter smaller than that of the pin shaft 3 is added on the pin shaft 3 to serve as a guide element, so that the guide element can be conveniently pre-installed in the pin hole. The lifting hook of the first chain block 6 is connected with the guide element, the first chain block 6 is used for drawing the guide element and the pin shaft 3 into the pin hole, and the guide element can be conveniently drawn into the pin hole completely firstly due to the fact that the diameter of the guide element is smaller than the aperture of the pin hole, and then the pin shaft 3 can be conveniently drawn into the pin hole under the guiding effect of the guide element. The pulling direction of the first chain block 6 is changed through the pulley mechanism 5, so that the pulling direction of the first chain block 6 is basically consistent with the axial direction of the pin hole, deviation pulling can be effectively prevented, the second chain block 7 is used for adjusting the height position of one end, away from the guide element, of the pin shaft 3, the concentricity of the pin shaft 3 and the pin hole is always consistent, and the pin shaft 3 can be accurately and conveniently pulled into the pin hole. And the tools used in the invention are small in size and convenient to use in a small space.
In conclusion, the large pin shaft with the large steel structure can be very conveniently installed in a high-altitude limited space, and the problem that the large pin shaft with the large steel structure is inconvenient to install due to the fact that large machinery cannot be used in the high-altitude limited space is solved. In addition, the invention does not need to arrange an operation platform, thereby effectively reducing the labor cost and the time cost for installing the large pin shaft in the high-altitude limited space.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The installation method of the large steel structure limited space pin shaft is characterized by comprising the following steps:
s1: manufacturing a guide element and a mounting element, wherein the guide element is made of a round pipe or round steel, the outer diameter of the round pipe is smaller than the diameter of the pin shaft, the diameter of the round steel is smaller than the diameter of the pin shaft, the guide element is connected with one end of the pin shaft, the guide element and the pin shaft share the same central axis, and the guide element and the pin shaft are combined to form the mounting element;
s2: arranging an auxiliary plate on the steel structure at a position close to the pin holes, forming through holes in the auxiliary plate, and aligning the through holes with the pin holes;
s3: arranging a pulley mechanism on the auxiliary plate, so that a sliding groove on one side of a pulley in the pulley mechanism is aligned with the through hole and the pin hole;
s4: hoisting the mounting element to a position close to the pin hole, and inserting the small-diameter end of the mounting element into the pin hole;
s5: preparing two inverted chains, namely a first inverted chain and a second inverted chain, wherein the first inverted chain and the second inverted chain are connected with a steel structure and are respectively positioned at two sides of a pin hole;
s6: the hand chain of pulling first chain block draws the installation component to the pinhole, simultaneously, constantly stimulates the hand chain of No. two chain blocks, constantly adjusts the high position of installation component major diameter end for the concentricity of installation component and pinhole keeps unanimous, can install the round pin axle to in the pinhole.
2. The method for installing the pin shaft in the limited space of the large steel structure as claimed in claim 1, wherein the guide element is a circular tube, and the circular tube is welded to the pin shaft.
3. The method for installing the pin shaft in the limited space of the large steel structure according to claim 2, wherein a circular plate is welded inside one end, away from the pin shaft, of the circular pipe, a first rotating buckle is arranged on the circular plate, and a lifting hook at the tail end of a lifting inverted chain of the first inverted chain is connected with the first rotating buckle.
4. The method for installing the pin shaft in the limited space of the large steel structure according to claim 3, wherein one end, away from the circular tube, of the pin shaft is provided with a second rotating buckle, and a hoisting hook at the tail end of a hoisting chain block of the second chain block is connected with the second rotating buckle.
5. The method for installing the pin shaft in the limited space of the large-scale steel structure according to claim 1, wherein the guide element is made of round steel, one end, connected with the pin shaft, of the round steel is provided with a connecting screw rod part, and the connecting screw rod part and the round steel share the same central axis; the round pin axle is provided with the round pin axle and links to each other the one end with the round steel and is provided with the screw hole, the screw hole shares the central axis with the round pin axle, the screw thread of the connecting screw rod portion of round steel is installed in the screw hole of round pin axle.
6. The method for installing the pin shaft in the limited space of the large steel structure according to claim 5, wherein a third rotating buckle is arranged at one end, away from the pin shaft, of the round steel, and a hoisting hook at the tail end of the hoisting chain block of the first chain block is connected with the third rotating buckle.
7. The method for installing the large steel structure pin shaft in the limited space as claimed in claim 6, wherein a fourth rotating buckle is arranged at one end of the pin shaft away from the round steel, and a lifting hook at the tail end of the lifting chain block of the second chain block is connected with the fourth rotating buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469176.6A CN114837430B (en) | 2022-04-30 | 2022-04-30 | Installation method of large-scale steel structure limited space pin shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469176.6A CN114837430B (en) | 2022-04-30 | 2022-04-30 | Installation method of large-scale steel structure limited space pin shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114837430A true CN114837430A (en) | 2022-08-02 |
| CN114837430B CN114837430B (en) | 2023-12-15 |
Family
ID=82568577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210469176.6A Active CN114837430B (en) | 2022-04-30 | 2022-04-30 | Installation method of large-scale steel structure limited space pin shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114837430B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0812249A (en) * | 1994-07-01 | 1996-01-16 | Kawasaki Heavy Ind Ltd | Attaching method in hoisting device |
| CN202200243U (en) * | 2011-08-31 | 2012-04-25 | 中国海洋石油总公司 | Heavy pin shaft mounting device |
| CN102627229A (en) * | 2012-04-11 | 2012-08-08 | 中联重科股份有限公司 | Pin shaft connecting structure, mounting and dismounting method thereof and tower crane |
| CN214942600U (en) * | 2021-07-27 | 2021-11-30 | 上海宝冶集团有限公司 | Laborsaving advancing device suitable for installation of large-scale round pin axle of steel construction engineering |
| CN113997048A (en) * | 2021-11-19 | 2022-02-01 | 徐州建机工程机械有限公司 | Pin shaft installation device suitable for small space and use method |
-
2022
- 2022-04-30 CN CN202210469176.6A patent/CN114837430B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0812249A (en) * | 1994-07-01 | 1996-01-16 | Kawasaki Heavy Ind Ltd | Attaching method in hoisting device |
| CN202200243U (en) * | 2011-08-31 | 2012-04-25 | 中国海洋石油总公司 | Heavy pin shaft mounting device |
| CN102627229A (en) * | 2012-04-11 | 2012-08-08 | 中联重科股份有限公司 | Pin shaft connecting structure, mounting and dismounting method thereof and tower crane |
| CN214942600U (en) * | 2021-07-27 | 2021-11-30 | 上海宝冶集团有限公司 | Laborsaving advancing device suitable for installation of large-scale round pin axle of steel construction engineering |
| CN113997048A (en) * | 2021-11-19 | 2022-02-01 | 徐州建机工程机械有限公司 | Pin shaft installation device suitable for small space and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114837430B (en) | 2023-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202272617U (en) | Adjustable hoisting balance device for engineering machine engine | |
| CN114837430A (en) | Method for installing large-scale steel structure limited space pin shaft | |
| CN103072513A (en) | Multifunctional construction vehicle for high-tension line construction | |
| CN203389957U (en) | Wire drawing device | |
| CN215287725U (en) | Movable pulley block assembling device of bridge crane | |
| CN201946914U (en) | Seat frame used for supporting cable reel to be lifted up | |
| CN201704540U (en) | Composite chuck for creel on beam-dyeing sizing machine | |
| CN212335017U (en) | Cone sintering device in preparation of optical fiber preform powder body | |
| CN210658056U (en) | Bridge steel stand hoist and mount device of turning | |
| CN211283450U (en) | Auxiliary system for rolling large-scale round tiles of thin-wall steel pipes | |
| CN102942104B (en) | Hoisting crane drop in beam and use the hoisting crane of this drop in beam | |
| CN204265302U (en) | One can dismounting loop wheel machine flexibly | |
| CN207139977U (en) | A kind of timber integrally saws the double fixing devices of dual-gripper | |
| CN110921581A (en) | Modular hoisting equipment for high-rise steel structure and construction method | |
| CN218642271U (en) | Universal hoisting tool for stator core with winding | |
| CN220449520U (en) | General crucible hoist and mount frock of casting | |
| CN220664652U (en) | Self-clamping wallboard demolding machine | |
| CN211496546U (en) | Porous formula hoist and mount compensating beam | |
| CN214023117U (en) | Reducing device for pipe blank | |
| CN219863199U (en) | Pipeline supporting and positioning device for municipal construction | |
| CN112387900B (en) | Method for straightening pile head reinforcing steel bar | |
| CN221216788U (en) | Amplitude-variable supporting beam for hoisting operation | |
| CN220300134U (en) | Combined lifting appliance for lifting slender components | |
| CN211221986U (en) | Sizing die for forming aluminum-plastic composite belt | |
| CN218371197U (en) | Hoisting device for preventing orifice deformation of secant pile steel sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |