CN111604636B - Chemical plant pipeline laying connecting device and connecting method thereof - Google Patents
Chemical plant pipeline laying connecting device and connecting method thereof Download PDFInfo
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- CN111604636B CN111604636B CN202010499636.0A CN202010499636A CN111604636B CN 111604636 B CN111604636 B CN 111604636B CN 202010499636 A CN202010499636 A CN 202010499636A CN 111604636 B CN111604636 B CN 111604636B
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- clamping block
- buffer
- chemical plant
- rod
- straight pipe
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/09—Accessories therefor, e.g. anchors for bringing two tubular members closer to each other
Abstract
The invention relates to a pipeline laying and connecting device for a chemical plant and a connecting method thereof. The invention can solve the problems that the traditional chemical plant pipeline laying connecting device adopts a manual auxiliary mode to temporarily fix the pipeline joint and then weld or fix the pipeline joint due to irregular pipeline shape and larger pipeline volume, the method has high labor intensity, low efficiency and manpower and material waste, the joint is difficult to align accurately in the pipeline moving process, and the like.
Description
Technical Field
The invention relates to the technical field of pipeline laying connection, in particular to a pipeline laying connection device and a pipeline laying connection method for a chemical plant.
Background
The pipeline laying connection means that the prefabricated pipe sections are connected into a complete system according to the requirements of different pipeline shapes. In construction, different connection methods should be selected according to the material and shape of the pipeline. The common steel pipes are connected by screw thread, flange, welding, socket joint, pipe bonding, etc.
At present, when the pipeline of a chemical plant is laid and connected, the following defects generally exist: traditional chemical plant pipelaying connecting device because the pipeline shape is irregular, and the pipeline is bulky, adopts artifical supplementary mode usually, carries out temporary fixation with the pipeline junction, carries out welded connection or other fixed connected modes again, and this kind of method is intensity of labour big not only, and is inefficient, extravagant manpower and materials, also hardly makes the accurate alignment of junction in addition at the pipeline removal in-process.
Disclosure of Invention
Technical problem to be solved
The invention can solve the problems that the traditional chemical plant pipeline laying connecting device adopts a manual auxiliary mode to temporarily fix the pipeline joint and then weld or fix the pipeline joint due to irregular pipeline shape and larger pipeline volume, the method has high labor intensity, low efficiency and manpower and material waste, the joint is difficult to align accurately in the pipeline moving process, and the like.
(II) technical scheme
In order to achieve the purpose, the invention adopts the following technical scheme that the chemical plant pipeline laying connecting device comprises a fixed base, a connecting rod and a clamping device, wherein the connecting rod is arranged above the fixed base, and the clamping device is symmetrically arranged at the front end and the rear end of the connecting rod.
The fixed base comprises a fixed base plate, a feeding plate and an air suction mechanism, the feeding plate is symmetrically arranged at the left and right of the upper end of the fixed base plate, and the air suction mechanism is arranged inside the fixed base plate.
The clamping device comprises a first clamping block, a second clamping block, a buffer mechanism, a fixing mechanism and a locking mechanism, wherein the two ends of a connecting rod are symmetrically provided with the second clamping block, the first clamping block is connected with the second clamping block in a sliding fit manner, the lower end of the first clamping block is provided with the buffer mechanism, one end of the fixing mechanism is arranged at the lower end of the buffer mechanism in a sliding fit manner, the other end of the fixing mechanism is arranged in the second clamping block, the locking mechanism is arranged in the first clamping block, during specific work, the lower end of a bent pipe is arranged between the first clamping block and the second clamping block, the position between the first clamping block and the second clamping block is limited through the locking mechanism so as to be locked on the lower end face of the bent pipe, the bent pipe is moved to the upper part of a straight pipe in a lifting manner, the positions of the bent pipe and the straight pipe at the joint are adjusted so as to correspond to each other, the bent pipe and the clamping device are integrally moved downwards, so that the buffer mechanism firstly contacts the straight pipe and moves upwards to drive the fixing mechanism to fix the contact position of the straight pipe and the bent pipe.
The fixing mechanism comprises a linkage frame, a push rod, a limiting plate, a push rack, a fixing claw, a driven rack and a mounting plate, one end of the linkage frame is arranged at the lower end of the buffer mechanism in a sliding fit mode, the other end of the linkage frame is provided with the push rod, the lower end of the push rod is arranged on the limiting plate in a sliding fit mode, the limiting plate is fixedly connected at the lower end of the inner wall of the second clamping block, the push rack is symmetrically arranged at the middle part of the push rod in a left-right mode, the fixing claws are symmetrically arranged on the inner wall of the second clamping block in a left-right mode in a pin shaft connection mode and are meshed with the push rack through the driven rack, the mounting plate is arranged at the upper end of the push rod in a sliding fit mode, the mounting plate is fixedly connected at the upper end of the inner wall of the second clamping block, when the concrete work is carried out, the buffer block firstly contacts with a straight pipe and moves upwards to push the linkage frame to move upwards, and then drive the catch bar and make it inwards to slide at limiting plate and mounting panel, promote rack upward movement this moment and drive driven rack and rotate, and then drive the stationary dog and use the round pin axle as the center of rotation and rotate downwards, fix the contact position of straight tube and return bend.
As a preferred technical scheme of the invention, the air suction mechanism comprises an air pump, an air pump base, a working groove and air suction holes, the air pump is arranged at the lower side of the front end of the fixed bottom plate through the air pump base, the middle part of the fixed bottom plate is provided with the working groove, and the inner walls of the working groove are uniformly provided with the air suction holes.
As a preferred technical scheme of the invention, the buffer mechanism comprises a sliding rod, a buffer block and a buffer spring, the sliding rod is arranged at the lower end of the first clamping block in a sliding fit mode, the buffer block is arranged at the lower end of the sliding rod, and the first clamping block is connected with the buffer block through the buffer spring.
As a preferred technical scheme, the locking mechanism comprises a threaded rod, a working cavity, an extrusion rod, a reset spring, an accommodating cavity, a rotating plate and a compression spring, the threaded rod is mounted on the outer wall of the first clamping block in a threaded connection mode, the working cavity is formed in the first clamping block, the extrusion rod is arranged in the working cavity in a sliding fit mode, the extrusion rod and the threaded rod are correspondingly arranged in a matched mode, the reset spring is mounted between the extrusion rod and the first clamping block, the accommodating cavity is formed in the second clamping block in a left-right symmetrical mode, the rotating plate is uniformly arranged in the accommodating cavity, the rotating plate is mounted in the accommodating cavity in a pin shaft connection mode, and the rotating plate is connected with the second clamping block through the compression spring.
As a preferable technical scheme of the invention, trapezoidal lugs are uniformly distributed on the contact surface of the extrusion end of the extrusion rod and the rotating plate.
As a preferable technical scheme of the invention, the air suction hole is connected with the air pump through an air suction cavity arranged in the fixed bottom plate.
As a preferable technical scheme of the invention, the lower end of the buffer block is in a semi-arc design.
In addition, the invention also provides a connecting method of the chemical plant pipeline laying connecting device, which comprises the following steps:
s1, air suction: placing the straight pipe on the fixed bottom plate, rotating the straight pipe to enable the joint of the straight pipe and the bent pipe to be upward, starting the air suction mechanism, and fixing the rotating position of the straight pipe;
s2, locking: the lower end of the bent pipe is placed between the first clamping block and the second clamping block, and the position between the first clamping block and the second clamping block is limited through a locking mechanism so that the bent pipe is locked on the lower end surface of the bent pipe;
s3, fixing: the bent pipe is moved to the upper part of the straight pipe in a hoisting mode, the positions of the bent pipe and the straight pipe at the joint are adjusted to be mutually corresponding, the bent pipe and the clamping device are integrally moved downwards, the linkage frame is pushed to ascend through the buffer mechanism, the pushing rod is further driven to ascend, the fixing claw is driven to downwards rotate under the action of the pushing rack and the driven rack, the position of the straight pipe is fixed, and therefore the contact position of the straight pipe and the bent pipe is fixed;
s4, welding: and welding the contact position of the straight pipe and the bent pipe, and loosening the locking mechanism to take the clamping device off the bent pipe.
(III) advantageous effects
1. A chemical plant pipeline laying connecting device and a connecting method thereof solve the problem of high labor intensity caused by irregular shape and large volume of chemical plant pipelines through mechanical linkage control, ensure the connecting quality of the chemical plant pipelines, temporarily connect the chemical plant pipelines through machinery, and then fix the chemical plant pipelines, save manpower and material resources and improve efficiency, and simultaneously design a simple detachable device which can be easily taken down and installed next time after the fixation is finished;
2. the invention relates to a pipeline laying and connecting device for a chemical plant and a connecting method thereof, wherein a buffer mechanism and a fixing mechanism are used in a linkage and matching manner, so that after a buffer block is contacted with a straight pipe to move, the fixing mechanism arranged at the lower end of an elbow pipe can temporarily and stably clamp the contact position of the straight pipe and the elbow pipe after a series of transmissions, so as to fix the joint of the straight pipe and the elbow pipe;
3. the invention relates to a pipeline laying and connecting device for a chemical plant and a connecting method thereof.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is a schematic perspective view of the suction mechanism of the present invention;
FIG. 4 is a cross-sectional view of the locking mechanism of the present invention;
FIG. 5 is an enlarged view of the invention in section X of FIG. 2;
FIG. 6 is an enlarged view of the Y-direction portion of FIG. 2 of the present invention;
fig. 7 is a partial enlarged view of fig. 4 taken in the direction Z.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 7, a chemical plant pipe laying connecting device comprises a fixed base 1, a connecting rod 2 and a clamping device 3, wherein the connecting rod 2 is arranged above the fixed base 1, and the clamping device 3 is symmetrically arranged at the front end and the rear end of the connecting rod 2.
The fixed base 1 comprises a fixed base plate 11, a feeding plate 12 and an air suction mechanism 13, the feeding plate 12 is symmetrically arranged at the left and right of the upper end of the fixed base plate 11, and the air suction mechanism 13 is arranged inside the fixed base plate 11.
The clamping device 3 comprises a first clamping block 31, a second clamping block 32, a buffer mechanism 33, a fixing mechanism 34 and a locking mechanism 35, the two ends of the connecting rod 2 are symmetrically provided with the second clamping block 32, the first clamping block 31 and the second clamping block 32 are connected in a sliding fit mode, the lower end of the first clamping block 31 is provided with the buffer mechanism 33, one end of the fixing mechanism 34 is arranged at the lower end of the buffer mechanism 33 in a sliding fit mode, the other end of the fixing mechanism 34 is arranged in the second clamping block 32, the locking mechanism 35 is arranged in the first clamping block 31, when the device works specifically, the lower end of the bent pipe is arranged between the first clamping block 31 and the second clamping block 32, the position between the first clamping block 31 and the second clamping block 32 is limited through the locking mechanism 35, so that the bent pipe is locked at the lower end face of the bent pipe, the bent pipe is moved to the upper part of the straight pipe in a lifting mode, the positions of the connecting parts of the bent pipe and the straight pipe are adjusted to be mutually corresponding, the bent pipe and the clamping device 3 are integrally moved downwards, the buffer mechanism 33 is enabled to firstly contact the straight pipe and move upwards, and the fixing mechanism 34 is driven to fix the contact positions of the straight pipe and the bent pipe.
The fixing mechanism 34 comprises a linkage frame 341, a pushing rod 342, a limiting plate 343, a pushing rack 344, a fixing claw 345, a driven rack 346 and a mounting plate 347, one end of the linkage frame 341 is arranged at the lower end of the buffer mechanism 33 in a sliding fit manner, the pushing rod 342 is arranged at the other end of the linkage frame 341, the lower end of the pushing rod 342 is arranged on the limiting plate 343 in a sliding fit manner, the limiting plate 343 is fixedly connected to the lower end of the inner wall of the second clamping block 32, the pushing racks 344 are symmetrically arranged at the middle part of the pushing rod 342 in a left-right manner, the fixing claws 345 are symmetrically arranged on the inner wall of the second clamping block 32 in a pin shaft connection manner, the fixing claws 345 are meshed with the pushing racks 344 through the driven racks 346, the mounting plate 347 is arranged at the upper end of the pushing rod 342 in a sliding fit manner, and the mounting plate 347 is fixedly connected to the upper end of the inner wall of the second clamping block 32, the buffer block 332 firstly contacts the straight pipe and moves upwards to push the linkage frame 341 to move upwards, so as to drive the push rod 342 to slide upwards in the limiting plate 343 and the mounting plate 347, at this time, the push rack 344 moves upwards to drive the driven rack 346 to rotate, so as to drive the fixing claw 345 to rotate downwards by taking the pin shaft as a rotation center, and thus, the contact position of the straight pipe and the bent pipe is fixed.
The locking mechanism 35 comprises a threaded rod 351, a working cavity 352, an extrusion rod 353, a return spring 354, an accommodating cavity 355, a rotating plate 356 and a compression spring 357, the threaded rod 351 is installed on the outer wall of the first clamping block 31 in a threaded connection mode, the working cavity 352 is formed in the first clamping block 31, the extrusion rod 353 is arranged in the working cavity 352 in a sliding fit mode, the extrusion rod 353 and the threaded rod 351 are arranged in a corresponding fit mode, the return spring 354 is installed between the extrusion rod 353 and the first clamping block 31, the accommodating cavity 355 is symmetrically formed in the second clamping block 32 in the left and right direction, the rotating plates 356 are uniformly arranged in the accommodating cavity 355, the rotating plates 356 are installed in the accommodating cavity 355 in a pin shaft connection mode, the rotating plates 356 are connected with the second clamping block 32 through the compression spring 357, and during specific work, the threaded rod 351 is rotated to move into the working cavity 352, and the extrusion rod 353 and the return spring 354 are pressed, at the moment, the extrusion rod 353 moves towards the working cavity 352, the extrusion end of the extrusion rod 353 enters the accommodating cavity 355, is in contact with the rotating plate 356 and presses the rotating plate 356 to rotate, the compression spring 357 is pressed at the same time, the position of the extrusion rod 353 is locked under the elastic action of the compression spring 357 and the frictional resistance of the trapezoidal convex block, so that the positions of the first clamping block 31 and the second clamping block 32 are locked, after the connection is completed, the threaded rod 351 is rotated to loosen the extrusion of the extrusion rod 353, and the extrusion rod 353 is reset under the elastic action of the return spring 354.
Trapezoidal convex blocks are uniformly distributed on the contact surface between the extrusion end of the extrusion rod 353 and the rotating plate 356.
The air suction hole 134 is connected to the air pump 131 through an air suction chamber formed inside the fixed base plate 11.
The lower end of the buffer block 332 is designed in a semi-arc shape.
In addition, the invention also provides a connecting method of the chemical plant pipeline laying connecting device, which comprises the following steps:
s1, air suction: placing the straight pipe on the fixed bottom plate 11, rotating the straight pipe to enable the joint of the straight pipe and the bent pipe to be upward, starting the air suction mechanism 13, and fixing the rotating position of the straight pipe;
s2, locking: the lower end of the elbow is placed between the first clamping block 31 and the second clamping block 32, and the position between the first clamping block 31 and the second clamping block 32 is limited through the locking mechanism 35, so that the lower end face of the elbow is locked;
s3, fixing: the bent pipe is moved to the upper part of the straight pipe in a hoisting mode, the positions of the bent pipe and the straight pipe at the joint are adjusted to be mutually corresponding, the bent pipe and the clamping device 3 are integrally moved downwards, the linkage frame 341 is pushed to ascend through the buffer mechanism 33, the push rod 342 is further driven to ascend, the fixing claw 345 is driven to downwards rotate under the action of the push rack 344 and the driven rack 346, the position of the straight pipe is fixed, and therefore the contact position of the straight pipe and the bent pipe is fixed;
s4, welding: and welding the contact position of the straight pipe and the bent pipe, and releasing the locking mechanism 35 to take the clamping device 3 off the bent pipe.
The above description 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 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 (8)
1. The utility model provides a chemical plant pipelaying connecting device, includes unable adjustment base (1), connecting rod (2), clamping device (3), its characterized in that: a connecting rod (2) is arranged above the fixed base (1), and clamping devices (3) are symmetrically arranged at the front end and the rear end of the connecting rod (2); wherein:
the fixed base (1) comprises a fixed bottom plate (11), a feeding plate (12) and an air suction mechanism (13), wherein the feeding plate (12) is symmetrically arranged at the left and right of the upper end of the fixed bottom plate (11), and the air suction mechanism (13) is arranged on the fixed bottom plate (11);
the clamping device (3) comprises a first clamping block (31), a second clamping block (32), a buffer mechanism (33), a fixing mechanism (34) and a locking mechanism (35), wherein the second clamping block (32) is symmetrically arranged at two ends of the connecting rod (2), the first clamping block (31) is connected with the second clamping block (32) in a sliding fit mode, the buffer mechanism (33) is arranged at the lower end of the first clamping block (31), one end of the fixing mechanism (34) is arranged at the lower end of the buffer mechanism (33) in a sliding fit mode, the other end of the fixing mechanism (34) is arranged inside the second clamping block (32), and the locking mechanism (35) is arranged inside the first clamping block (31);
the fixing mechanism (34) comprises a linkage frame (341), a push rod (342), a limiting plate (343), a push rack (344), a fixing claw (345), a driven rack (346) and a mounting plate (347), one end of the linkage frame (341) is installed at the lower end of the buffer mechanism (33) in a sliding fit mode, the other end of the linkage frame (341) is provided with the push rod (342), the lower end of the push rod (342) is arranged on the limiting plate (343) in a sliding fit mode, the limiting plate (343) is fixedly connected to the lower end of the inner wall of the second clamping block (32), the push racks (344) are symmetrically installed at the left and right of the middle part of the push rod (342), the fixing claws (345) are symmetrically installed at the left and right of the inner wall of the second clamping block (32) in a pin shaft connection mode, the fixing claws (345) are meshed with the push racks (344) through the driven rack (346), the mounting plate (347) is arranged at the upper end of the push rod (342) in a sliding fit mode, and the mounting plate (347) is fixedly connected to the upper end of the inner wall of the second clamping block (32).
2. A chemical plant pipelaying connection according to claim 1, wherein: the air suction mechanism (13) comprises an air pump (131), an air pump base (132), a working groove (133) and air suction holes (134), the air pump (131) is installed on the lower side of the front end of the fixed bottom plate (11) through the air pump base (132), the working groove (133) is formed in the middle of the fixed bottom plate (11), and the air suction holes (134) are uniformly formed in the inner wall of the working groove (133).
3. A chemical plant pipelaying connection according to claim 1, wherein: buffer gear (33) include slide bar (331), buffer block (332), buffer spring (333), slide bar (331) is installed through sliding fit's mode to the lower extreme of a centre gripping piece (31), buffer block (332) is installed to the lower extreme of slide bar (331), a centre gripping piece (31) is connected through buffer spring (333) with buffer block (332).
4. A chemical plant pipelaying connection according to claim 1, wherein: the locking mechanism (35) comprises a threaded rod (351), a working cavity (352), an extrusion rod (353), a reset spring (354), an accommodating cavity (355), a rotating plate (356) and a compression spring (357), the threaded rod (351) is installed on the outer wall of the first clamping block (31) in a threaded connection mode, the working cavity (352) is formed in the first clamping block (31), the extrusion rod (353) is arranged in the working cavity (352) in a sliding fit mode, the extrusion rod (353) and the threaded rod (351) are arranged in a corresponding fit mode, the reset spring (354) is installed between the extrusion rod (353) and the first clamping block (31), the accommodating cavity (355) is formed in the second clamping block (32) in a left-right symmetrical mode, the rotating plate (356) is evenly arranged in the accommodating cavity (355), and the rotating plate (356) is installed in the accommodating cavity (355) in a pin shaft connection mode, the rotating plate (356) is connected with the second clamping block (32) through a compression spring (357).
5. A chemical plant pipelaying connection according to claim 4, wherein: the contact surfaces of the extrusion end of the extrusion rod (353) and the rotating plate (356) are uniformly distributed with trapezoidal lugs.
6. A chemical plant pipelaying connection according to claim 2, wherein: the air suction hole (134) is connected with the air pump (131) through an air suction cavity arranged in the fixed bottom plate (11).
7. A chemical plant pipelaying connection according to claim 3, wherein: the lower end of the buffer block (332) is in a semi-arc design.
8. A chemical plant pipelaying connection according to any of claims 1-7, wherein: the connecting method of the chemical plant pipeline laying connecting device comprises the following steps:
s1, air suction: putting the straight pipe on a fixed bottom plate (11), rotating the straight pipe to enable the joint of the straight pipe and the bent pipe to be upward, starting an air suction mechanism (13) to fix the rotating position of the straight pipe;
s2, locking: the lower end of the bent pipe is placed between a first clamping block (31) and a second clamping block (32), and the position between the first clamping block (31) and the second clamping block (32) is limited through a locking mechanism (35) so as to be locked on the lower end face of the bent pipe;
s3, fixing: the bent pipe is moved to the upper part of the straight pipe in a hoisting mode, the position of the bent pipe and the position of the straight pipe at the joint are adjusted to be mutually corresponding, the bent pipe and the clamping device (3) are integrally moved downwards, the linkage frame (341) is pushed to ascend through the buffer mechanism (33), the push rod (342) is further driven to ascend, the fixing claw (345) is driven to rotate downwards under the action of the push rack (344) and the driven rack (346), the position of the straight pipe is fixed, and therefore the contact position of the straight pipe and the bent pipe is fixed;
s4, welding: and welding the contact position of the straight pipe and the bent pipe, and loosening the locking mechanism (35) to take the clamping device (3) off the bent pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010499636.0A CN111604636B (en) | 2020-06-04 | 2020-06-04 | Chemical plant pipeline laying connecting device and connecting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010499636.0A CN111604636B (en) | 2020-06-04 | 2020-06-04 | Chemical plant pipeline laying connecting device and connecting method thereof |
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| CN111604636A CN111604636A (en) | 2020-09-01 |
| CN111604636B true CN111604636B (en) | 2021-11-30 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113028138B (en) * | 2021-02-05 | 2023-06-06 | 浙江同济科技职业学院 | Reinforcing device and reinforcing method for water supply and drainage paved pipelines |
| CN113074278B (en) * | 2021-03-25 | 2022-05-24 | 中国水利水电第四工程局有限公司 | Pipeline auxiliary laying device with limiting function for civil engineering construction |
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| CN209954054U (en) * | 2019-05-17 | 2020-01-17 | 乐清市浙南气动焊钳有限公司 | Auxiliary transfer device for steel pipe welding machine tool |
| CN210393489U (en) * | 2019-08-21 | 2020-04-24 | 潍坊长安铁塔股份有限公司 | Gantry crane for hoisting steel pipe |
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| CN2366223Y (en) * | 1998-05-05 | 2000-03-01 | 庞林华 | Device for aligning and clamping ends of pipes for welding them |
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| Publication number | Publication date |
|---|---|
| CN111604636A (en) | 2020-09-01 |
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Effective date of registration: 20211101 Address after: 350000 Huitan, Jiangkou Town, Jianyang District, Nanping City, Fujian Province (business premises):Jianyang Tongyou (Shuiwei) 350000 Huitan, Jiangkou Town, Jianyang District, Nanping City, Fujian Province (business place: Tongyou Shuiwei, Jianyang City) Applicant after: FUJIAN KINGS FLUORIDE INDUSTRY Co.,Ltd. Address before: 241002 Anhui Normal University, Huajin South Road, Yijiang District, Wuhu City, Anhui Province Applicant before: Huang Wei |
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