CN113695862A - Sleeving method for multilayer spiral tube bundle with special-shaped space bend - Google Patents
Sleeving method for multilayer spiral tube bundle with special-shaped space bend Download PDFInfo
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- CN113695862A CN113695862A CN202111023975.2A CN202111023975A CN113695862A CN 113695862 A CN113695862 A CN 113695862A CN 202111023975 A CN202111023975 A CN 202111023975A CN 113695862 A CN113695862 A CN 113695862A
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- spiral
- sleeving
- spiral tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
A method for sleeving a plurality of layers of spiral tube bundles with special-shaped space bends includes the steps of vertically leveling an inner cylinder, ensuring verticality and levelness, sequentially sleeving the inner cylinder according to the spiral diameter of each layer of spiral tube bundle from small to large and fixing the inner cylinder. The method comprises the following specific steps: 1. spirally sleeving the coiled spiral coil pipe with the special-shaped space bend in a single layer; 2. the method comprises the following steps of (1) installing a plurality of spirally sleeved single-layer spiral tube bundles into a sleeving tool, assembling supporting bars, adjusting and fixing the spiral diameter, the screw pitch and the phase angle of a space bend, and ensuring the dimensional accuracy of the spiral tube bundles; 3. hoisting a spiral tube bundle with the minimum spiral diameter into the inner cylinder and fixing the support bars; 4. the spiral tube bundles of the other layers are sleeved in sequence according to the spiral diameter from small to large. The invention improves the sleeving efficiency of the multilayer spiral tube bundle with the special-shaped space bend and ensures the sleeving precision and quality of the multilayer spiral tube bundle.
Description
Technical Field
The invention belongs to the technical field of thermal engineering, and particularly relates to a sleeving method of a multilayer spiral tube bundle with a special-shaped space bend.
Background
With the increasing global energy shortage, nuclear energy is gaining more and more attention as reliable clean energy. Due to the factors of long construction period, high construction cost, limited construction area and the like of a large-scale commercial reactor, a miniaturized (modularized) reactor becomes a new approach for nuclear energy development. The small reactor has become the mainstream direction of the current nuclear power design because of the advantages of compact volume, low construction cost, good economy and the like, which are widely concerned by various countries.
In order to ensure that the heat transfer pipe of a small reactor achieves the optimal heat exchange efficiency in a limited space, the design of a single branch heat transfer pipe is changed from the U shape of a conventional pressurized water reactor into a spiral shape so as to increase the heat exchange area. The final heat exchange tube structure is composed of a plurality of layers of spiral tube bundles, the spiral diameters of all the layers are different, the spiral tube bundles are sleeved together from small to large to form an integral spiral tube bundle, in addition, the two ends of the spiral tube are usually designed into the shape of a special-shaped space bend for the convenience of connecting a water supply end and an outlet end, the requirements on the manufacture of a heat transfer tube are high, and the difficulty in sleeving the spiral tube bundles is further improved.
The multi-layer spiral tube bundle sleeving device with the special-shaped space bend has high technical index requirements, and the main technical indexes are as follows: the tolerance requires extremely tight spiral diameter, verticality, parallelism and the like, the position degree requires extremely high space bending phase, and meanwhile, the clearance between layers is small, which is also a great difficulty of sleeving. Therefore, a method for sleeving the multilayer spiral tube bundle with the special-shaped space bend is needed to be designed quickly, safely and reliably.
Disclosure of Invention
The invention aims to provide a method for quickly and accurately sleeving a multilayer spiral tube bundle with a special-shaped space bend.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for sleeving a multilayer spiral tube bundle with a special-shaped space bend is characterized by comprising the following steps:
firstly, vertically placing the inner cylinder by using a travelling crane, adjusting the verticality and the levelness of the inner cylinder to be within set values, and after the adjustment is finished, adopting rigid fixation;
secondly, the spiral pipes are spirally sleeved together layer by layer in a way of rotating one by one under the horizontal state of the spiral pipes, and each layer forms an independent spiral pipe bundle;
thirdly, assembling the first layer with the smallest spiral diameter to the sleeving tool; the sleeving tool comprises an upper ring plate and a lower ring plate, and the two ring plates are supported by a plurality of stand columns; the upright column is connected with the upper ring plate and the lower ring plate through a connecting plate; a waist-shaped hole is formed in the connecting plate; the inner side edge of the upper annular plate is detachably provided with a simulation tube plate, and a spatial bent tube hole is formed in the simulation tube plate; the outer side of the spiral tube bundle is tightly attached to the upright post, and the spiral tube bundle is vertically fixed through the supporting bars; positioning the phase position of the pipe end of the special-shaped space bend through the simulation pipe plate;
fourthly, erecting the spiral tube bundle by using a travelling crane hoisting sleeving tool, slowly erecting the spiral tube bundle of the sling tool, adjusting the position of the supporting strip to correspond to the corresponding position of the inner cylinder, and slowly sleeving the spiral tube bundle into the inner cylinder until the spiral tube bundle reaches a set position;
fifthly, supporting bar fixing blocks are assembled at the two ends of the supporting bars and are welded and fixed on the inner cylinder, so that the relative positions of the spiral tube bundle and the inner cylinder are fixed;
sixthly, radially tightening the spiral tube bundle in multiple directions by adopting a flexible tool to keep the diameter of the spiral within a tolerance range, and removing the sleeving tool;
and (seventhly) sleeving and fixing the spiral tube bundles of the rest layers layer by layer according to the steps from the third step to the sixth step.
It is further characterized in that: the supporting strips are slender straight strips with clamping grooves, and each clamping groove is clamped into one spiral pipe during assembly.
It is further characterized in that: : the simulation tube plate is made of nylon materials, holes are drilled in the simulation tube plate, the positions of the holes correspond to the positions of the phase positions of the tube ends one by one, and the diameter of each hole is 0.1-0.2mm larger than the outer diameter of the tube.
Further: the outer diameter of the spiral pipe is 12-22mm, the spiral diameter is 300-1800mm, the size deviation of the spiral diameter is +/-2 mm, the spiral height is 500-10000mm, 4-30 spiral pipes of each layer of spiral pipe bundle are arranged, the number of the sleeved layers is 3-18, and the gap between the layers is not more than 10 mm.
Preferably: in the step (I), the verticality of the inner cylinder is less than or equal to 1mm, and the levelness is less than or equal to 1 mm.
Step (two) in spiral tube bank revolve the cover go on revolving set dolly, revolve set dolly bottom and be furnished with the gyro wheel, can the bulk movement, set up rotatable support on the gyro wheel, rotatory along with the spiral pipe, keep first spiral pipe position motionless, the first spiral pipe of slowly screw in of manual rotatory second spiral pipe, until the spiral section of two spiral pipes imbeds completely, according to this kind of mode with the whole cover of revolving of the spiral pipe of each layer together, constitute solitary spiral tube bank.
And (3) in the step (III), the sleeving tool is used for adjusting the dimensional tolerance of the spiral diameter of the spiral tube bundle to be within +/-2 mm, the dimensional deviation of the space bending phase position is within +/-1 mm, the straightness of the space bending tube section is within +/-1 mm, and the parallelism is within +/-1 mm.
The method can quickly and accurately realize the sleeving of the spiral heat exchange tube bundle steam generator with the special-shaped space bend through a special sleeving tool, and can realize the positioning and sleeving of the spiral tube bundles with different diameters only by one tool, thereby improving the sleeving efficiency of the multilayer spiral tube bundles with the special-shaped space bend and ensuring the sleeving precision and quality of the multilayer spiral tube bundles.
Drawings
FIG. 1 is a schematic view of a single layer spiral pipe spiral casing of the present invention.
FIG. 2 is a schematic view of the present invention for assembling and adjusting a single-layer spiral tube bundle using a sleeving tool.
FIG. 3 is a schematic drawing of the spiral tube bundle nest of the present invention.
Detailed Description
A method for sleeving a multilayer spiral tube bundle with a special-shaped space bend comprises the following steps:
firstly, as shown in figure 3, the inner cylinder 10 is vertically placed on a leveled platform 13 by a travelling crane, the verticality of the inner cylinder 10 is adjusted to be less than or equal to 1mm, the levelness is adjusted to be less than or equal to 1mm, and rigid fixation is adopted after adjustment is finished.
(II) as shown in figure 1, adopt under the horizontal state of spiral pipe to overlap spiral pipe successive layer soon together by the mode of a rotation gradually, it goes on overlapping dolly 3 soon to overlap soon, it is furnished with the gyro wheel to overlap 3 bottoms of dolly soon, can the bulk movement, rotatable support above the gyro wheel, can rotate along with the spiral pipe is rotatory, keep first spiral pipe 1 position motionless, manual rotatory second spiral pipe 2 slowly is close to first spiral pipe 1, then the screw in, until the spiral section of two spiral pipes imbeds completely, overlap the whole cover of spiral pipe of each layer together soon according to this kind of mode, constitute solitary spiral tube bank.
(III) assembling and sleeving the tool, as shown in fig. 2, fixing a connecting plate 4 by bolts and nuts respectively on the vertical columns 5, wherein the four groups are determined according to the number of the supporting bars, then connecting the four groups with two ring plates 6 by bolts and nuts, adjusting the distance between two opposite vertical columns 5 by using the waist-shaped holes on the connecting plates 4, ensuring that the tolerance of the size of the outer diameter of the spiral of the first layer spiral tube bundle 7 to be assembled is within +/-2 mm, and ensuring that the distance between two opposite connecting plates 4 and the edge of the ring plates is within +/-0.5 mm, thereby ensuring the coaxiality of the subsequent spiral tube bundle and the tool.
And (IV) assembling the corresponding spiral tube bundle 7 to the sleeving tool, as shown in fig. 2, tightly attaching the outer side of the spiral tube bundle 7 to the upright post 5, assembling a supporting strip 8, wherein the supporting strip 8 is a long and thin straight strip with clamping grooves, clamping each clamping groove into a spiral tube during assembling, spacing two adjacent tubes, and bundling and fixing the supporting strip 8 and the upright post 5 by using a nylon bundling belt after assembling. And finally, assembling a simulation tube plate 9, wherein the simulation tube plate 9 is a tool designed according to the phase position of the special-shaped space bend of the drawing, assembling the simulation tube plate 9 at the corresponding position of the annular plate 6, adjusting the space bend section of the spiral tube bundle 7, ensuring that the straight tube section can smoothly penetrate into the tube hole of the simulation tube plate 9 and ensuring that the phase position of the special-shaped space bend section meets the requirements of the drawing.
And (V) as shown in fig. 3, hoisting the sleeving tool 11 by using the travelling crane 12 to erect the spiral tube bundle 7, slowly hoisting the spiral tube bundle 7 with the sleeving tool 11, wherein the travelling crane has a stepless speed change function, adjusting the position of the supporting strip 8 to correspond to the corresponding position of the inner cylinder 10, and slowly sleeving the spiral tube bundle 8 into the inner cylinder 10 until the position is specified in the drawing.
And sixthly, supporting bar fixing blocks (marked on the drawing) are assembled at the two ends of the supporting bars 8 and are welded and fixed on the inner cylinder 10, so that the relative positions of the spiral tube bundle 7 and the inner cylinder 10 are fixed.
And (seventhly) radially tightening the spiral tube bundle 7 in multiple directions by adopting a flexible elastic band or other tightening tools to keep the diameter of the spiral within a tolerance range, and dismantling the sleeving tool 11.
And (eighthly), sleeving and fixing the spiral tube bundles 7 of the rest layers layer by layer according to the steps (three) - (seven).
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the present patent claims.
Claims (7)
1. A method for sleeving a multilayer spiral tube bundle with a special-shaped space bend is characterized by comprising the following steps:
firstly, vertically placing the inner cylinder by using a travelling crane, adjusting the verticality and the levelness of the inner cylinder to be within set values, and after the adjustment is finished, adopting rigid fixation;
secondly, the spiral pipes are spirally sleeved together layer by layer in a way of rotating one by one under the horizontal state of the spiral pipes, and each layer forms an independent spiral pipe bundle;
thirdly, assembling the first layer with the smallest spiral diameter to the sleeving tool; the sleeving tool comprises an upper ring plate and a lower ring plate, and the two ring plates are supported by a plurality of stand columns; the upright column is connected with the upper ring plate and the lower ring plate through a connecting plate; a waist-shaped hole is formed in the connecting plate; the inner side edge of the upper annular plate is detachably provided with a simulation tube plate, and a spatial bent tube hole is formed in the simulation tube plate; the outer side of the spiral tube bundle is tightly attached to the upright post, and the spiral tube bundle is vertically fixed through the supporting bars; positioning the phase position of the pipe end of the special-shaped space bend through the simulation pipe plate;
fourthly, erecting the spiral tube bundle by using a travelling crane hoisting sleeving tool, slowly erecting the spiral tube bundle of the sling tool, adjusting the position of the supporting strip to correspond to the corresponding position of the inner cylinder, and slowly sleeving the spiral tube bundle into the inner cylinder until the spiral tube bundle reaches a set position;
fifthly, supporting bar fixing blocks are assembled at the two ends of the supporting bars and are welded and fixed on the inner cylinder, so that the relative positions of the spiral tube bundle and the inner cylinder are fixed;
sixthly, radially tightening the spiral tube bundle in multiple directions by adopting a flexible tool to keep the diameter of the spiral within a tolerance range, and removing the sleeving tool;
and (seventhly) sleeving and fixing the spiral tube bundles of the rest layers layer by layer according to the steps from the third step to the sixth step.
2. The method of claim 1, wherein the method comprises: the supporting strips are slender straight strips with clamping grooves, and each clamping groove is clamped into one spiral pipe during assembly.
3. The method of claim 1, wherein the method comprises: the simulation tube plate is made of nylon materials, holes are drilled in the simulation tube plate, the positions of the holes correspond to the positions of the phase positions of the tube ends one by one, and the diameter of each hole is 0.1-0.2mm larger than the outer diameter of the tube.
4. The method for sleeving a multilayer spiral tube bundle with the special-shaped space bends, as recited in any one of claims 1 to 3, wherein the method comprises the following steps: the outer diameter of the spiral pipe is 12-22mm, the spiral diameter is 300-1800mm, the size deviation of the spiral diameter is +/-2 mm, the spiral height is 500-10000mm, 4-30 spiral pipes of each layer of spiral pipe bundle are arranged, the number of the sleeved layers is 3-18, and the gap between the layers is not more than 10 mm.
5. The method of claim 4, wherein the method comprises the steps of: in the step (I), the verticality of the inner cylinder is less than or equal to 1mm, and the levelness is less than or equal to 1 mm.
6. The method of claim 4, wherein the method comprises the steps of: step (two) in spiral tube bank revolve the cover go on revolving set dolly, revolve set dolly bottom and be furnished with the gyro wheel, can the bulk movement, set up rotatable support on the gyro wheel, rotatory along with the spiral pipe, keep first spiral pipe position motionless, the first spiral pipe of slowly screw in of manual rotatory second spiral pipe, until the spiral section of two spiral pipes imbeds completely, according to this kind of mode with the whole cover of revolving of the spiral pipe of each layer together, constitute solitary spiral tube bank.
7. The method of claim 4, wherein the method comprises the steps of: and (3) in the step (III), the sleeving tool is used for adjusting the dimensional tolerance of the spiral diameter of the spiral tube bundle to be within +/-2 mm, the dimensional deviation of the space bending phase position is within +/-1 mm, the straightness of the space bending tube section is within +/-1 mm, and the parallelism is within +/-1 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111023975.2A CN113695862B (en) | 2021-09-02 | 2021-09-02 | Sleeving method for multilayer spiral tube bundle with special-shaped space bend |
| PCT/CN2022/107058 WO2023029800A1 (en) | 2021-09-02 | 2022-07-21 | Method for sleeving of multi-layer spiral tube bundle having profiled spatial bend |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111023975.2A CN113695862B (en) | 2021-09-02 | 2021-09-02 | Sleeving method for multilayer spiral tube bundle with special-shaped space bend |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113695862A true CN113695862A (en) | 2021-11-26 |
| CN113695862B CN113695862B (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111023975.2A Active CN113695862B (en) | 2021-09-02 | 2021-09-02 | Sleeving method for multilayer spiral tube bundle with special-shaped space bend |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113695862B (en) |
| WO (1) | WO2023029800A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115351540A (en) * | 2022-08-18 | 2022-11-18 | 东方电气集团东方锅炉股份有限公司 | Adjustable spiral pipe ring assembling and correcting tool and method |
| WO2023029800A1 (en) * | 2021-09-02 | 2023-03-09 | 宝银特种钢管有限公司 | Method for sleeving of multi-layer spiral tube bundle having profiled spatial bend |
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| Publication number | Publication date |
|---|---|
| WO2023029800A1 (en) | 2023-03-09 |
| CN113695862B (en) | 2023-03-28 |
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