CN113526328A - Flue installation device and method - Google Patents
Flue installation device and method Download PDFInfo
- Publication number
- CN113526328A CN113526328A CN202110768000.6A CN202110768000A CN113526328A CN 113526328 A CN113526328 A CN 113526328A CN 202110768000 A CN202110768000 A CN 202110768000A CN 113526328 A CN113526328 A CN 113526328A
- Authority
- CN
- China
- Prior art keywords
- flue
- smoke
- floor
- lifting rope
- support column
- 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.)
- Pending
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/201—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided from above, e.g. by ceilings of buildings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
- B66C23/208—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures with supporting couples provided from the side, e.g. by walls of buildings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/04—Driving gear manually operated
Abstract
The invention relates to a flue installation device which comprises a support frame, a pulley block, a handle and a lifting rope, wherein the pulley block is rotatably arranged on the support frame, the handle is in driving connection with the pulley block, the lifting rope is used for connecting a flue, and the lifting rope is connected with the pulley block and wound on the pulley block in a parallel mode. The invention also relates to a flue installation method applying the flue installation device, wherein the flue installation device is moved to each floor to lift and fix the smoke pipes of each floor, so that the smoke pipes of each floor are connected to form a flue. The flue installation device disclosed by the invention is simple in structure, low in cost and low in energy consumption. When the flue installation method is implemented, the flue can be conveniently conveyed to each floor. When the flue installation device is used in cooperation with the flue installation method, the operation of hoisting the smoke tube is very simple, the operation of workers is labor-saving, and the installation efficiency of the smoke tube is high.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a flue installation device and a flue installation method.
Background
According to building industry standards, it is necessary to provide flues in residential buildings for exhausting fumes from kitchen cooking activities and foul bathroom air. The flue is formed by connecting smoke pipes arranged among floors, and the smoke pipes are usually prefabricated by sandwiching alkali-resistant glass fiber mesh cloth in sulphoaluminate cement or sandwiching steel wire mesh in ordinary silicate cement and other reinforcing materials. The smoke pipes are installed layer by layer from bottom to top and then are butted to form a flue. The flue must be installed at the joint of the floor slab, the joint between the upper and lower smoke pipes is sealed by cement mortar, the gap between the pipeline and the floor slab is filled with fine aggregate concrete, and the concrete ridge is poured. After the flue is installed, the gap between the flue and the wall surface is filled with fine aggregate concrete. The traditional flue has small section size, the corresponding smoke tube has light weight, and when the smoke tube is installed in a building floor, the smoke tube on the floor is lifted up manually for installation. However, as the floors of the building structure are heightened, the size of the mounting section of the flue is increased, the smoke tube which needs to be mounted correspondingly is heavy in weight, the manual lifting and transporting can not meet the construction requirements, and when large-scale lifting equipment is adopted, the transporting work among the floors is troublesome, the moving is inconvenient, and the energy consumption is high.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a flue installation device which is low in installation cost, convenient to move, labor-saving in installation and capable of easily completing flue hoisting work in view of the prior art.
The second technical problem to be solved by the present invention is to provide a flue installation method using the flue installation device in view of the above prior art.
The technical scheme adopted by the invention for solving the first problem is as follows: the utility model provides a flue installation device which characterized in that: the smoke pipe lifting device comprises a support frame, a pulley block, a handle and a lifting rope, wherein the pulley block is rotatably arranged on the support frame, the handle is in driving connection with the pulley block, the lifting rope is used for being connected with a smoke pipe, and the lifting rope is connected with the pulley block and wound on the pulley block.
In order to conveniently realize the connection between the lifting rope and the smoke tube, the free end of the lifting rope is connected with a connecting piece used for connecting the smoke tube.
The structure is simple, the connecting piece is a connecting rod matched with the inner diameter of the smoke tube, pits are correspondingly arranged on the opposite surfaces of the inner wall of the smoke tube respectively to form a hoisting structure, and then the connecting rod is clamped in the pits on the inner wall of the smoke tube, so that the limiting connection of the connecting rod and the smoke tube is realized. During the installation, the connecting rod stretches into to the tobacco pipe in along the axial of tobacco pipe, then resumes to radial extending direction from the below of pit gradually, and then the joint is in the pit. The connecting rod can adopt the reinforcing bar, and the tobacco pipe is made by cement, therefore the reinforcing bar is through putting into the hoisting structure that forms at the pit, and then realizes the hoist and mount work of tobacco pipe.
Simple structure ground, the support frame includes vertical setting in order to support the first support column on the floor board, connects on first support column top and can support the second support column on the wall of tobacco pipe mounting hole one side, still includes the third support column of slope connection between first support column and second support column.
In order to avoid the situation that the second supporting column in the supporting frame slides downwards in the process of lifting the smoke pipe, the supporting frame is connected with a suspension rope, and the free end of the suspension rope is connected with a supporting rod capable of supporting in a smoke pipe mounting hole of an upper floor plate.
Preferably, the suspension cord is attached to the free end of the second support post.
In order to flexibly adjust the position of the lifting rope according to different diameters of the flue mounting opening, the lifting rope can extend out of the middle of the flue mounting opening, and at least two adjusting grooves are formed in the supporting frame;
the pulley block comprises a driving wheel and a driven wheel, the driving wheel is rotatably connected to a fixed position of the support frame and is in transmission connection with the handle, the driven wheel is in transmission connection with the driving wheel through a lifting rope, and the driven wheel is movably limited in an adjusting groove through a rotating shaft.
In order to prevent the smoke tube from falling, the handle is connected with the pulley block through a gear set, the support frame is also elastically provided with a falling protector, and the falling protector elastically abuts against the gear set.
The technical scheme adopted by the invention for solving the second problem is as follows: a flue installation method is characterized in that: the flue installation device is adopted;
conveying the smoke pipes of all floors to installation floors, and placing the flue installation device on the floor of the last floor A +1 of the floor A where the smoke pipes to be installed are located;
the support frame is supported at the position of a smoke pipe mounting port on the floor plate, the handle is operated, and then the lifting rope is lowered to the floor A through the smoke pipe mounting port and is connected with one end of a smoke pipe placed on the floor A;
operating the handle, and further pulling up one end of the smoke pipe through the lifting rope, so that the end of the smoke pipe gradually moves upwards and extends into the smoke pipe mounting port of the floor A + 1;
adjusting the smoke pipe to move to a set position under the auxiliary lifting force action of the flue installation device, and fixing the smoke pipe;
and moving the flue mounting device to each floor to fix the smoke pipes of each floor, so that the smoke pipes of each floor are connected to form a flue.
In order to quickly finish the installation of the smoke pipes in place, the smoke pipes of all floors are placed near the smoke pipe installation port, and one end of each smoke pipe is close to the smoke pipe installation port; the lifting rope is connected with one end of the smoke tube far away from the smoke tube mounting opening.
Compared with the prior art, the invention has the advantages that: the flue installation device disclosed by the invention is simple in structure, low in cost and low in energy consumption. When the flue installation method is implemented, the flue can be conveniently conveyed to each floor. When the flue installation device is used in cooperation with the flue installation method, the operation of hoisting the smoke tube is very simple, the operation of workers is labor-saving, and the installation efficiency of the smoke tube is high.
Drawings
FIG. 1 is a schematic structural diagram of a flue installation apparatus according to an embodiment of the present invention.
Fig. 2 is a structural diagram of the support frame in the embodiment of the invention.
FIG. 3 is a diagram of an application condition of the flue installation device in the embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 3, the flue installation device in this embodiment includes a support frame 1, a pulley block 2, a handle 3, a lifting rope 4, a connecting member 5, a suspension rope 6, and a stay bar 7.
The support frame 1 in this embodiment includes a first support column 11 vertically arranged to be supported on a floor plate, a second support column 12 connected to the top end of the first support column 11 and capable of being supported on a wall surface on one side of a smoke tube mounting hole, and a third support column 13 obliquely connected between the first support column 11 and the second support column 12. First support column 11, second support column 12, third support column 13 all adopt the channel-section steel, and first support column 11, second support column 12, third support column 13 weld together and form the triangle-shaped. The first support column 11 and the second support column 12 are in an inverted L shape, and the second support column 12 is slightly inclined upward with respect to a direction perpendicular to the first support column 11. The smoke tube mounting hole is usually formed at a corner of a floor, that is, the side of the smoke tube mounting hole is usually provided with at least one side wall, when the smoke tube mounting hole is used, the first support column 11 vertically supports against the floor plate, and the second support column 12 supports against the wall surface of the side wall beside the smoke tube mounting hole. Based on the structure of the support frame 1, in order to avoid the situation that the second support column 12 of the support frame 1 slides down due to the downward pulling of the smoke tube when the smoke tube is lifted, the support frame 1 in the embodiment is connected with a suspension rope 6, and the free end of the suspension rope 6 is connected with a support rod 7 which can be supported in the smoke tube mounting hole of the upper floor plate. The support rod 7 penetrates into the smoke pipe mounting hole of the upper floor plate, and then is transversely clamped on the smoke pipe mounting hole of the upper floor plate to play a role in lifting the second support column 12. In particular, the suspension cord 6 is attached to the free end of the second support column 12.
The pulley block 2 and the handle 3 are rotatably arranged on the support frame 1, and one end of the lifting rope 4 is connected to the support frame 1 and wound on the pulley block 2.
In this embodiment, the pulley block 2 includes the action wheel 21 and the driven wheel 22, is provided with the mounting base who is used for installing the action wheel 21 on the rear portion of first support column 11, and then on the action wheel 21 rotates and connects the mounting base to realize the rotation of fixed position on support frame 1 and connect, this action wheel 21 is connected with the transmission of handle 3, and during the use, operating personnel rotates handle 3 and then drives action wheel 21 and rotate. The mounting base is further provided with a gear set, the handle 3 is connected with an input gear in the gear set, an output gear of the gear set is in driving connection with the driving wheel 21, and when the handle 3 is operated, the pulley block 2 is driven to rotate through the action of the gear set, so that the lifting rope 4 is driven to lift.
In order to avoid the problem of falling in the smoke tube lifting process of the lifting rope 4 and ensure the construction safety, the support frame 1 is also elastically provided with a falling protector which elastically supports against the gear set, and the falling protector can avoid the sudden and rapid rotation of the gear set under the action of the gravity of the smoke tube, thereby avoiding the sudden falling of the smoke tube. The fall arrester may take the configuration shown in figure 2.
The driven wheel 22 is in transmission connection with the driving wheel 21 through the lifting rope 4, namely the lifting rope 4 is lapped on the driven wheel 22. The free end of the lifting rope 4 is connected with the connecting piece 5, the connecting piece 5 in the embodiment is a connecting rod matched with the inner diameter of the smoke tube, the free end of the lifting rope 4 naturally droops under the action of the connecting piece 5, and the stability of lapping the lifting rope 4 on the driven wheel 22 can be ensured through the gravity action of the connecting piece 5.
Corresponding to the connecting piece 5, the relative faces of the inner wall of the smoke tube are respectively provided with pits, so that the connecting rod can be clamped in the pits of the inner wall of the smoke tube, and the connecting rod is in limit connection with the smoke tube. During the installation, the connecting rod stretches into to the tobacco pipe in along the axial of tobacco pipe, then resumes to radial extending direction from the below of pit gradually, and then the joint is in the pit. The connecting rod can adopt the reinforcing bar, and the tobacco pipe is made by cement, therefore the reinforcing bar is through putting into the hoisting structure that forms at the pit, and then realizes the hoist and mount work of tobacco pipe. The connection between the connecting piece 5 and the smoke tube is realized through the mode, and then the hoisting work of the smoke tube is carried out. Of course, other connection methods can be adopted to realize the connection between the lifting rope 4 and the smoke tube. The connecting piece 5 in the embodiment has a simple structure and high connection efficiency during construction.
The support frame 1 is provided with at least two adjusting grooves 14, in this embodiment, an angle steel structure is arranged on the upper surface of the first support column 11, a plurality of adjusting grooves 14 are arranged on the angle steel at intervals along the extending direction of the first support column 11, and the number of the adjusting grooves 14 is specifically set as required. Driven wheel 22 is movably spacing in an adjustment tank 14 through the pivot, wears to establish a pivot in driven wheel 22 promptly, according to the concrete position of tobacco pipe mounting hole, with this pivot joint in an adjustment tank 14 for driven wheel 22 is in the middle part position of tobacco pipe mounting hole, and then makes the middle part position that the tobacco pipe mounting hole can be aimed at to flagging free end among the lifting rope 4, more does benefit to the work of lifting by crane of tobacco pipe. The adjusting groove 14 meets the installation construction of the smoke tube under the conditions of smoke tube installation holes with different aperture.
The flue installation method in the embodiment is implemented by adopting the flue installation device. The installation of the flue usually adopts the installation order from bottom to top.
The flue pipes of all floors are firstly conveyed to the installation floors. Then the flue installation device is placed on the floor of the last floor A +1 of the floor A where the smoke pipe to be installed is located. Namely, if the smoke pipe of the first floor needs to be installed, the smoke flue installation device is placed on the second floor.
The support frame 1 is supported at the position of the smoke pipe mounting port on the floor plate, and based on the structure of the support frame 1 in the embodiment, the support frame 1 can be supported in the manner described above. After the support frame 1 is stably supported, if the flue installation device is located on the second floor, the suspension rope 6 supporting rod 7 is clamped in a floor flue pipe installation hole of the third floor so as to avoid the problem of gliding in the construction process.
And (3) shaking the operating handle 3, further lowering the connecting piece 5 at the free end of the lifting rope 4 to the floor A through the smoke pipe mounting port, and connecting the lifting rope 4 with one end of a smoke pipe placed on the floor A through the connecting piece 5. In the embodiment, when the smoke pipes are placed on each floor, the smoke pipes on each floor are placed near the smoke pipe mounting port, and one end of each smoke pipe is close to the smoke pipe mounting port; the lifting rope 4 is connected with one end of the smoke tube far away from the smoke tube mounting opening.
And reversely shaking the operating handle 3, and further pulling up one end of the smoke tube through the lifting rope 4, so that one end of the smoke tube connected with the lifting rope 4 gradually moves upwards and extends into the smoke tube mounting port of the floor A + 1. Usually, the outer diameter of the smoke tube is smaller than the diameter of the smoke tube mounting hole, so that an operation space is provided to make the upper end of the smoke tube extend into the smoke tube mounting hole of the floor A + 1. And the gap between the outer wall of the smoke pipe and the smoke pipe mounting hole is treated in the subsequent process of the building.
And adjusting the smoke pipe to move to a set position under the auxiliary lifting force action of the flue installation device, fixing the smoke pipe, and aligning and connecting the smoke pipe with the smoke pipe below if the smoke pipe which is installed is arranged below the currently installed smoke pipe.
Thus, the flue mounting device is moved to each floor to fix the smoke pipes of each floor, so that the smoke pipes of each floor are connected together to form the flue.
The flue installation device disclosed by the invention is simple in structure, low in cost and low in energy consumption. When the flue installation method is implemented, the flue can be conveniently conveyed to each floor. When the flue installation device is used in cooperation with the flue installation method, the operation of hoisting the smoke tube is very simple, the operation of workers is labor-saving, and the installation efficiency of the smoke tube is high.
Claims (10)
1. The utility model provides a flue installation device which characterized in that: the smoke pipe lifting device comprises a support frame (1), a pulley block (2) rotatably arranged on the support frame (1), a handle (3) in driving connection with the pulley block (2), and a lifting rope (4) used for connecting a smoke pipe, wherein the lifting rope (4) is connected and wound on the pulley block (2).
2. The flue mounting apparatus of claim 1 wherein: the free end of the lifting rope (4) is connected with a connecting piece (5) used for connecting a smoke tube.
3. The flue mounting apparatus of claim 2 wherein: the connecting piece (5) is a connecting rod matched with the inner diameter of the smoke tube.
4. A flue mounting apparatus as claimed in any one of claims 1 to 3 wherein: support frame (1) is including vertical setting with first support column (11) of support on the floor board, connect on first support column (11) top and can support second support column (12) on the wall of tobacco pipe mounting hole one side, still including third support column (13) of slope connection between first support column (11) and second support column (12).
5. The flue mounting apparatus of claim 4 wherein: the support frame (1) is connected with a suspension rope (6), and the free end of the suspension rope (6) is connected with a support rod (7) capable of supporting in a smoke pipe mounting hole of an upper floor plate.
6. The flue mounting apparatus of claim 5 wherein: the suspension rope (6) is connected to the free end of the second support column (12).
7. A flue mounting apparatus as claimed in any one of claims 1 to 3 wherein: at least two adjusting grooves (14) are arranged on the supporting frame (1);
the pulley block (2) comprises a driving wheel (21) and a driven wheel (22), the driving wheel (21) is rotatably connected to the fixed position of the support frame (1) and is in transmission connection with the handle (3), the driven wheel (22) is in transmission connection with the driving wheel (21) through a lifting rope (4), and the driven wheel (22) is movably limited in an adjusting groove (14) through a rotating shaft.
8. A flue mounting apparatus as claimed in any one of claims 1 to 3 wherein: the handle (3) is connected with the pulley block (2) through a gear set, the support frame (1) is also elastically provided with a falling protector, and the falling protector is elastically abutted to the gear set.
9. A flue installation method is characterized in that: use of a flue-mounting device as claimed in any one of claims 1 to 8;
conveying the smoke pipes of all floors to installation floors, and placing the flue installation device on the floor of the last floor A +1 of the floor A where the smoke pipes to be installed are located;
the support frame (1) is supported at the position of a smoke pipe mounting port on a floor plate, the handle (3) is operated, then the lifting rope (4) is placed to the floor A through the smoke pipe mounting port, and the lifting rope (4) is connected with one end of a smoke pipe placed on the floor A;
the handle (3) is operated, and one end of the smoke tube is pulled upwards through the lifting rope (4), so that the end of the smoke tube gradually moves upwards and extends into the smoke tube mounting opening of the floor A + 1;
adjusting the smoke pipe to move to a set position under the auxiliary lifting force action of the flue installation device, and fixing the smoke pipe;
and moving the flue mounting device to each floor to fix the smoke pipes of each floor, so that the smoke pipes of each floor are connected to form a flue.
10. The flue installation method of claim 9, wherein: placing the smoke pipes of all floors near the smoke pipe mounting openings, and enabling one ends of the smoke pipes to be close to the smoke pipe mounting openings; the lifting rope (4) is connected with one end of the smoke tube far away from the smoke tube mounting opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768000.6A CN113526328A (en) | 2021-07-07 | 2021-07-07 | Flue installation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768000.6A CN113526328A (en) | 2021-07-07 | 2021-07-07 | Flue installation device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113526328A true CN113526328A (en) | 2021-10-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110768000.6A Pending CN113526328A (en) | 2021-07-07 | 2021-07-07 | Flue installation device and method |
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| Country | Link |
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| CN (1) | CN113526328A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2620196A (en) * | 2022-07-01 | 2024-01-03 | Clevatech Ltd | Flue mounted hoist system and parts thereof |
-
2021
- 2021-07-07 CN CN202110768000.6A patent/CN113526328A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2620196A (en) * | 2022-07-01 | 2024-01-03 | Clevatech Ltd | Flue mounted hoist system and parts thereof |
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