CN114506760A - Steel wire rope protective sleeve and application thereof, and hoisting method of steam turbine cylinder body - Google Patents
Steel wire rope protective sleeve and application thereof, and hoisting method of steam turbine cylinder body Download PDFInfo
- Publication number
- CN114506760A CN114506760A CN202110469512.2A CN202110469512A CN114506760A CN 114506760 A CN114506760 A CN 114506760A CN 202110469512 A CN202110469512 A CN 202110469512A CN 114506760 A CN114506760 A CN 114506760A
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- Prior art keywords
- steel wire
- wire rope
- steam turbine
- cylinder body
- arc
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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
- B66C1/122—Sling or load protectors
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Abstract
The invention discloses a steel wire rope protective sleeve, application thereof and a hoisting method of a steam turbine cylinder body, wherein the steel wire rope protective sleeve comprises a protective cylinder body tightly hooped on the periphery of a steel wire rope; and the inner surface of the protection barrel is provided with a thread groove matched with the outer surface of the steel wire rope. The steel wire rope protective sleeve is used for being installed on a steel wire rope to protect the steel wire rope, so that the steel wire rope is prevented from being abraded; the steel wire rope protective sleeve is simple in structure, convenient to install and safe to use.
Description
Technical Field
The invention relates to the technical field of turbine maintenance, in particular to a steel wire rope protective sleeve and application thereof, and a hoisting method of a turbine cylinder body.
Background
In the process of the open-cylinder maintenance of the steam turbine, the high-pressure inner upper cylinder needs to be turned over due to the inspection and replacement of the first-stage inclined stator blade of the high-pressure cylinder or the treatment of the steam-blocking blade. A common high-pressure inner cylinder hoisting rope is a steel wire rope, and the steel wire rope is generally protected in a cloth pad mode in the overturning process.
In actual work, the cloth pad is not wear-resistant, and in the collision and abrasion process of the steel wire rope and the cylinder body, the steel wire rope is scratched due to friction between the steel wire rope and the cylinder body under stress.
Therefore, a main machine professional engineer designs and manufactures the special steel wire rope protective sleeve for turning over the cylinder, which is suitable for the high-pressure inner upper cylinder of the Yangjiang nuclear power turbine, by combining problems occurring on site, and the novel steel wire rope protective sleeve is well applied to overhaul of Yangjiang units, and has the characteristics of simple design, convenience in installation, safety in use, no damage to steel wire ropes and the like.
Disclosure of Invention
The invention aims to solve the technical problems of providing a steel wire rope protective sleeve which is convenient to install and safe to use and avoids abrasion of a steel wire rope, application of the steel wire rope protective sleeve and a method for hoisting a steam turbine cylinder body by using the steel wire rope protective sleeve.
The technical scheme adopted by the invention for solving the technical problems is as follows: the steel wire rope protective sleeve comprises a protective barrel body tightly hooped on the periphery of a steel wire rope; and the inner surface of the protection barrel is provided with a thread groove matched with the outer surface of the steel wire rope.
Preferably, the protective cylinder comprises at least two arc-shaped units; the arc-shaped units are connected in a surrounding manner to form the protection cylinder.
Preferably, the protection cylinder further comprises a plurality of groups of connecting components; the connecting assembly is arranged between the two adjacent arc-shaped units in a penetrating mode and used for fastening the arc-shaped units together.
Preferably, the connection assembly comprises a bolt.
Preferably, the protection cylinder comprises two semicircular arc-shaped units and an array connecting assembly;
a plurality of first connecting holes which extend to the butt joint surface of the arc-shaped unit and penetrate through the butt joint surface are arranged on the peripheral side surface of the arc-shaped unit; a plurality of second connecting holes are formed in the butt joint surface of the other arc-shaped unit, and the second connecting holes are communicated with the first connecting holes oppositely;
the connecting assembly penetrates into the second connecting hole from the first connecting hole and is fastened in the first connecting hole and the second connecting hole, and the two arc-shaped units which are butted are locked into a whole.
Preferably, the connection assembly comprises a bolt;
the screw part of the bolt penetrates into the second connecting hole from the first connecting hole; a step is arranged in the first connecting hole, and the head of the bolt is limited on the step.
Preferably, the wall thickness of the protective cylinder is more than or equal to 20 mm.
Preferably, the protective cylinder is made of aluminum.
The invention also provides application of the steel wire rope protective sleeve, wherein the steel wire rope protective sleeve is tightly hooped on the steel wire rope and is positioned on a rope section of the steel wire rope which is rubbed with a hoisted device.
The invention also provides a hoisting method of a steam turbine cylinder body, the steam turbine cylinder body comprises a high-pressure inner cylinder upper cylinder body and a low-pressure inner cylinder upper cylinder body of a steam turbine, any one of the steel wire rope protective sleeves is used, the hoisting method of the steam turbine cylinder body comprises the following steps of hoisting and overturning the steam turbine cylinder body before overhauling, and hoisting and overturning the steam turbine cylinder body before overhauling comprises the following steps:
s1, mounting a steel wire rope protective sleeve on the friction position of the steel wire rope in advance according to the friction position of the steel wire rope with the cylinder body in the hoisting process;
s2, respectively hanging the steel wire rope of the travelling crane main hook and the steel wire rope of the travelling crane auxiliary hook on hanging lugs at two ends of the middle section of the steam turbine cylinder body, and parallelly hoisting the steam turbine cylinder body;
the friction position on the steel wire rope comprises the end part of the steel wire rope close to the hanger and a rope section of the steel wire rope close to the outer wall of the steam turbine cylinder body;
s3, after the steam turbine cylinder body is lifted to a preset height, the travelling crane auxiliary hook descends to lower one end of the steam turbine cylinder body until the weight of the steam turbine cylinder body is borne by the travelling crane main hook, and a steel wire rope of the travelling crane auxiliary hook is released from the middle dividing surface;
s4, rotating the main hook of the traveling crane by 180 degrees to drive the middle section of the steam turbine cylinder body to face the side where the auxiliary hook of the traveling crane is located, and re-hanging the steel wire rope of the auxiliary hook of the traveling crane on the lug at the downward end of the middle section of the steam turbine cylinder body;
and S5, lifting the auxiliary hook of the traveling crane to lift the cylinder body of the steam turbine towards the lower end until the middle split surface of the cylinder body of the steam turbine is in a horizontal state.
The steel wire rope protective sleeve is used for being installed on a steel wire rope to protect the steel wire rope, so that the steel wire rope is prevented from being abraded; the steel wire rope protective sleeve is simple in structure, convenient to install and safe to use.
In the hoisting process of the steam turbine cylinder body, the steel wire rope protective sleeve is adopted to protect the steel wire rope, the problems of breakage, wire breakage and the like caused by abrasion of a rope section of the steel wire rope in contact with the cylinder body are avoided, the service life of the steel wire rope is prolonged, and the hoisting safety is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a top view of a steel cord protective casing according to an embodiment of the present invention;
FIG. 2 is a side view of a steel cord protective jacket according to one embodiment of the present invention;
FIGS. 3 (1) to (3) are schematic diagrams illustrating a hoisting process of the steam turbine cylinder block before maintenance in the present invention;
fig. 4 (1) to (3) are schematic diagrams of the hoisting process of the steam turbine cylinder body after the overhaul in the invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, a steel cable protective sleeve 1 according to an embodiment of the present invention includes a protective cylinder 10. The protection barrel 10 is tightly hooped on the periphery of the steel wire rope, plays a role in protecting the steel wire rope, and avoids the situation that the steel wire rope is abraded and even broken due to friction when various devices are hoisted.
The inner surface of the protection cylinder 10 is provided with a thread groove 20, and the thread groove 20 is matched with the outer surface of the steel wire rope, so that the protection cylinder 10 can be tightly attached to the periphery of the steel wire rope and cannot freely move on the steel wire rope.
The protective cylinder 10 is preferably made of aluminum material, and has certain structural strength and wear resistance.
Preferably, the wall thickness of the protective cylinder 10 is more than or equal to 20mm, so that the wear resistance of the protective cylinder 10 is improved.
The axial length of the protection cylinder 10 can be, but is not limited to 120mm, a plurality of protection cylinders 10 are arranged on one steel wire rope, and the protection cylinders 10 are arranged at intervals without influencing the bending use of the steel wire rope.
In order to facilitate the installation of the protection cylinder 10 on the steel wire rope, the protection cylinder 10 is arranged in a split manner. For example, the protection cylinder 10 may include at least two arc units 11 and several sets of connection assemblies 12. The inner surface of each arc-shaped unit 11 is provided with a thread groove 20; the arc units 11 are surrounded to form a protection cylinder 10, and the connecting assembly 12 is arranged between two adjacent arc units 11 in a penetrating mode to fasten the arc units 11 together. The connection assembly 12 may include a bolt.
As shown in fig. 1, in the present embodiment, the protective cylinder 10 includes two semicircular arc-shaped units 11. Each arc unit 11 has two abutting surfaces, and the two arc units 11 are abutted against each other through the abutting surfaces and fastened together through the connecting assembly 12.
Specifically, a plurality of first connection holes 13 are provided on the outer peripheral side surface of one arc unit 11, and the plurality of first connection holes 13 are distributed on both sides of the outer peripheral side surface. One side of the peripheral side surface of each arc-shaped unit 11 is provided with at least one first connecting hole 13; with the provision of the plurality of first connection holes 13 having one side or more, the plurality of first connection holes 13 are arranged at intervals along the length direction (axial direction) of the arc-shaped unit 11. The first connection hole 13 extends toward the abutting surface of the arc unit 11 and penetrates the abutting surface.
The abutting surface of the other arc-shaped unit 11 is provided with a plurality of second connecting holes 14, and the second connecting holes 14 are oppositely communicated with the first connecting holes 13. The second connection holes 14 are distributed on two abutting surfaces of the arc-shaped unit 11 and correspond to the first connection holes 13 one by one. The second connection hole 14 may be a blind hole located on the abutting surface, or may penetrate through the outer peripheral side surface of the arc unit 11.
The connecting assembly 12 penetrates into the second connecting hole 14 from the first connecting hole 13, is fastened in the first connecting hole 13 and the second connecting hole 14, and locks the two arc-shaped units 11 which are butted into a whole.
Further, the connecting assembly 12 comprises a bolt, further preferably a socket head cap screw. The second connecting holes 14 are screw holes corresponding to the bolts. The first connection hole 13 may also be a screw hole.
Structurally, the bolt includes a shank portion and a head portion on one end of the shank portion; a step 131 is arranged in the first connecting hole 13 corresponding to the head; the step 131 is formed by expanding inside the first connection hole 13. The screw portion of the bolt penetrates into the second connection hole 14 from the first connection hole 13; the head of the bolt is stopped on the step 131.
In addition, according to the length of the bolt and the depth of the first connection hole 13 and the second connection hole 14, the bolt is installed and then is integrally located in the arc unit 11 without protruding the first connection hole 13 and the second connection hole 14, so that the bolt does not protrude from the outer circumferential surface of the protection cylinder 10 and the outer circumferential surface of the protection cylinder 10 is maintained.
When the steel wire rope protective sleeve 1 is applied, the steel wire rope protective sleeve is tightly hooped on a steel wire rope and is positioned on a rope section where the steel wire rope and a hoisted device rub, the rope section is protected, and the problems that the steel wire rope protective sleeve rubs with the hoisted device to cause abrasion and the like are avoided.
In a nuclear power plant, hoisted equipment comprises a cylinder body of a steam turbine, and the cylinder body comprises a high-pressure cylinder and a low-pressure cylinder.
The steel wire rope protective sleeve 1 is used for hoisting a steam turbine cylinder body, and the steam turbine cylinder body comprises a high-pressure inner cylinder upper cylinder body and a low-pressure inner cylinder upper cylinder body of a steam turbine. With reference to fig. 1-3, the hoisting of the steam turbine cylinder body is realized by using the steel wire rope protective sleeve 1, the hoisting method of the steam turbine cylinder body comprises the following steps of hoisting and overturning the steam turbine cylinder body before overhauling, and hoisting and overturning the steam turbine cylinder body before overhauling comprises the following steps:
s1, mounting the steel cable protective sleeve 1 on the friction position of the steel cable 2, 3 in advance according to the friction position of the steel cable with the cylinder 100 in the hoisting process, as shown in (1) of fig. 3.
Installing the steel wire rope protective sleeve 1, and splitting the steel wire rope protective sleeve 1 into a plurality of arc-shaped units 11 in advance. For the installation of a steel wire rope protective sleeve 1, a plurality of arc-shaped units 11 are arranged around the periphery of a steel wire rope in a surrounding mode and then are matched and butted, the arc-shaped units are tightly attached to the periphery of the steel wire rope, and then a connecting assembly is installed between the arc-shaped units 10 to be fastened, so that an integral protective cylinder 10 is formed.
And S2, respectively hanging the steel wire rope 2 of the main hook of the crane and the steel wire rope 3 of the auxiliary hook of the crane on the hanging lugs at two ends of the middle section 101 of the steam turbine cylinder body 100, and parallelly hoisting the steam turbine cylinder body 100, as shown in (1) in figure 3.
The friction positions on the steel wire ropes 2 and 3 comprise end parts of the steel wire ropes close to the hangers and rope sections of the steel wire ropes close to the outer wall of the cylinder body of the steam turbine.
S3, after the steam turbine cylinder 100 is lifted to a predetermined height, the travelling crane secondary hook descends to lower one end of the steam turbine cylinder 100 until the travelling crane primary hook bears the weight of the steam turbine cylinder 100, the steel cable 3 of the travelling crane secondary hook is released from the middle split surface, and the steel cable 2 of the travelling crane primary hook is left to lift the steam turbine cylinder 100 in a vertical state, as shown in (2) in fig. 3.
S4, rotating the main hook of the traveling crane by 180 degrees to drive the middle section of the steam turbine cylinder body 100 to face the side where the auxiliary hook of the traveling crane is located, and hanging the steel wire rope 3 of the auxiliary hook of the traveling crane on a hanging lug at the downward end of the middle section 101 of the steam turbine cylinder body 100 again.
S5, the crane auxiliary hook is lifted to lift the turbine cylinder 100 toward the lower end until the bisecting plane 101 of the turbine cylinder 100 is horizontal, as shown in (3) of fig. 3.
Through the steps S1 to S5, the steam turbine cylinder block 100 is lifted and turned over, and the inside of the turned-over steam turbine cylinder block 100 faces upward, so that the steam turbine cylinder block can be overhauled.
The hoisting method of the steam turbine cylinder body further comprises the steps of hoisting and overturning the steam turbine cylinder body after overhauling, wherein the operation steps are opposite to the hoisting and overturning before overhauling. Referring to (1) to (3) in fig. 4, hoisting and turning over the steam turbine cylinder after the overhaul may specifically include the following steps:
and S1', according to the friction position between the steel wire rope and the cylinder body 100 in the hoisting process, the steel wire rope protective sleeve 1 is installed on the friction positions of the steel wire ropes 2 and 3 in advance.
The friction positions on the steel wire ropes 2 and 3 comprise the end parts of the steel wire ropes close to the hangers, and the rope sections of the steel wire ropes close to the outer wall of the cylinder body of the steam turbine.
S2', respectively hanging the wire rope 2 of the main hook of the traveling crane and the wire rope 3 of the auxiliary hook of the traveling crane on the hanging lugs at the two ends of the middle section 101 of the steam turbine cylinder body 100, and hoisting the steam turbine cylinder body 100 in parallel, as shown in (1) in fig. 4.
S3', after the steam turbine cylinder 100 is lifted to a predetermined height, the traveling crane auxiliary hook is lowered to lower one end of the steam turbine cylinder 100 until the traveling crane main hook bears the weight of the steam turbine cylinder 100, the wire rope 3 of the traveling crane auxiliary hook is released from the middle split surface, and the wire rope 2 of the traveling crane main hook is left to lift the steam turbine cylinder 100 in a vertical state, as shown in (1) to (2) in fig. 4.
S4', the main hook of the traveling crane rotates 180 degrees to drive the middle section of the steam turbine cylinder body 100 to face the side where the auxiliary hook of the traveling crane is located, and the steel wire rope 3 of the auxiliary hook of the traveling crane is hung on the hanging lug at the downward end of the middle section 101 of the steam turbine cylinder body 100 again.
S5', the auxiliary hook of the traveling crane rises to lift the steam turbine cylinder 100 toward the lower end until the middle section 101 of the steam turbine cylinder 100 is in a horizontal state, as shown in (3) in fig. 4.
Through steps S1 '-S5', the steam turbine cylinder block 100 is lifted and turned over, and the turned-over steam turbine cylinder block 100 is returned to the steam turbine with its inside facing downward.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A steel wire rope protective sleeve is characterized by comprising a protective barrel body tightly hooped on the periphery of a steel wire rope; and the inner surface of the protection barrel is provided with a thread groove matched with the outer surface of the steel wire rope.
2. A steel cord protective casing according to claim 1, wherein said protective cylinder comprises at least two arc shaped units; the arc-shaped units are connected in a surrounding manner to form the protection cylinder.
3. A steel cord protective casing according to claim 2, wherein said protective cylinder further comprises a plurality of sets of connection assemblies; the connecting assembly is arranged between the two adjacent arc-shaped units in a penetrating mode and used for fastening the arc-shaped units together.
4. A steel cable protective casing according to claim 3 wherein the connection assembly comprises a bolt.
5. A steel cord protective casing according to claim 1 wherein the protective cylinder comprises two semicircular arc-shaped units and several sets of connection assemblies;
a plurality of first connecting holes which extend to the butt joint surface of the arc-shaped unit and penetrate through the butt joint surface are arranged on the peripheral side surface of the arc-shaped unit; a plurality of second connecting holes are formed in the butt joint surface of the other arc-shaped unit, and the second connecting holes are communicated with the first connecting holes oppositely;
the connecting assembly penetrates into the second connecting hole from the first connecting hole and is fastened in the first connecting hole and the second connecting hole, and the two arc-shaped units which are butted are locked into a whole.
6. A steel cord protective casing according to claim 5 wherein the connection assembly comprises a bolt;
the screw part of the bolt penetrates into the second connecting hole from the first connecting hole; a step is arranged in the first connecting hole, and the head of the bolt is limited on the step.
7. A steel cord protective casing according to any one of claims 1 to 6 wherein the wall thickness of the protective cylinder is greater than or equal to 20 mm.
8. A steel cord protective casing according to any one of claims 1 to 6 wherein the protective cylinder is made of aluminium.
9. The application of the steel wire rope protective sleeve is characterized in that the steel wire rope protective sleeve is tightly hooped on a steel wire rope and is positioned on a rope section of the steel wire rope, which is rubbed with a hoisted device.
10. A method for hoisting a steam turbine cylinder body, wherein the steam turbine cylinder body comprises a high-pressure inner cylinder upper cylinder body and a low-pressure inner cylinder upper cylinder body of a steam turbine, and the method is characterized in that the steel wire rope protective sleeve according to any one of claims 1 to 8 is used, the method for hoisting the steam turbine cylinder body comprises the following steps of hoisting and turning the steam turbine cylinder body before maintenance, and the method comprises the following steps of:
s1, mounting a steel wire rope protective sleeve on the friction position of the steel wire rope in advance according to the friction position of the steel wire rope with the cylinder body in the hoisting process;
s2, respectively hanging the steel wire rope of the travelling crane main hook and the steel wire rope of the travelling crane auxiliary hook on hanging lugs at two ends of the middle section of the steam turbine cylinder body, and parallelly hoisting the steam turbine cylinder body;
the friction position on the steel wire rope comprises the end part of the steel wire rope close to the hanger and a rope section of the steel wire rope close to the outer wall of the steam turbine cylinder body;
s3, after the steam turbine cylinder body is lifted to a preset height, the travelling crane auxiliary hook descends to lower one end of the steam turbine cylinder body until the weight of the steam turbine cylinder body is borne by the travelling crane main hook, and a steel wire rope of the travelling crane auxiliary hook is released from the middle dividing surface;
s4, rotating the main hook of the traveling crane by 180 degrees to drive the middle section of the steam turbine cylinder body to face the side where the auxiliary hook of the traveling crane is located, and re-hanging the steel wire rope of the auxiliary hook of the traveling crane on the lug at the downward end of the middle section of the steam turbine cylinder body;
and S5, lifting the auxiliary hook of the traveling crane to lift the cylinder body of the steam turbine towards the lower end until the middle split surface of the cylinder body of the steam turbine is in a horizontal state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469512.2A CN114506760A (en) | 2021-04-28 | 2021-04-28 | Steel wire rope protective sleeve and application thereof, and hoisting method of steam turbine cylinder body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110469512.2A CN114506760A (en) | 2021-04-28 | 2021-04-28 | Steel wire rope protective sleeve and application thereof, and hoisting method of steam turbine cylinder body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114506760A true CN114506760A (en) | 2022-05-17 |
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ID=81548782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110469512.2A Pending CN114506760A (en) | 2021-04-28 | 2021-04-28 | Steel wire rope protective sleeve and application thereof, and hoisting method of steam turbine cylinder body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114506760A (en) |
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2021
- 2021-04-28 CN CN202110469512.2A patent/CN114506760A/en active Pending
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