CN213598025U - Split pedal tool in low-pressure cylinder of steam turbine - Google Patents

Abstract

The utility model provides a divide face footboard instrument in steam turbine low pressure jar, belongs to steam turbine low pressure jar and overhauls technical field. The utility model discloses a locate the interior jar with outer jar on the fulcrum axial supporting component, lay in on the interior outer jar and the axial supporting component movable cover plate subassembly and fixed apron subassembly. The utility model discloses simple structure, simple to operate can prevent effectively that personnel and article from falling, saves repair time simultaneously.

Description

Split pedal tool in low-pressure cylinder of steam turbine

Technical Field

The utility model relates to a steam turbine low-pressure cylinder overhauls technical field, especially relates to a steam turbine low-pressure cylinder mid-split footboard instrument.

Background

The low-pressure cylinder of the steam turbine is divided into two layers of cylinder bodies of a low-pressure inner cylinder and a low-pressure outer cylinder, and the low-pressure outer cylinder is directly connected with a condenser. The inner cylinder and the outer cylinder are of an upper half cylinder structure and a lower half cylinder structure, a split bolt in the outer cylinder needs to be dismounted during maintenance, the upper half of the outer cylinder needs to be lifted away, and then the low-pressure inner cylinder is disassembled. After the low-pressure outer cylinder is half-removed, discontinuous holes with the span of 2 meters and the length of about 9 meters exist between the two sides of the inner cylinder and the outer cylinder, the falling height can reach 25 meters, and the condenser is located under the holes, so that the condenser heat transfer pipe is easily damaged by being unable to be repaired after falling, and the power of a unit is influenced. In the installation stage of the unit, the scaffold is paved at the hole position, but the scaffold has the following defects: 1. the scaffold needs to be set up from the condenser, and is about 8m high, and set up time is long, and 2, well facet hole is irregular, can not cover completely, and 3, scaffold emergence interference change is comparatively consuming time when overhauing. Therefore, a special tool needs to be developed, and the special tool is laid between the low-pressure inner cylinder and the low-pressure outer cylinder, so that the inner cylinder can be maintained by personnel, the falling of articles and personnel is prevented, and meanwhile, the maintenance project of the inner cylinder is not interfered.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that above-mentioned prior art exists, provide a divide face footboard instrument in steam turbine low-pressure cylinder, its simple structure, simple to operate can prevent effectively that personnel and article from falling, saves repair time simultaneously.

The utility model aims at realizing through the following technical scheme:

the utility model provides a divide face footboard instrument in steam turbine low pressure jar, includes the axial supporting component of locating on interior jar and the outer jar fulcrum, lay on interior outer jar and reach removable cover subassembly and fixed apron subassembly on the axial supporting component.

The utility model discloses mainly cover the hole of interior outer cylinder mesosphere through removable cover subassembly and fixed apron subassembly to set up axial supporting component in necessary position department and provide stable apron strong point, ensure the stability of apron. In addition, the cover plate in the movable cover plate assembly can be turned over as required, so that interference in the cylinder body dismantling process is effectively avoided.

As the utility model discloses it is preferred, the axial supporting component includes the pendant, locates a supporting beam of pendant both sides, the pendant is hung on interior outer jar fulcrum. The axial supporting component is simple in structure and convenient to install, is directly hung on the inner and outer cylinder supporting points through the hanging piece, and provides reliable cover plate supporting points through the supporting beams on the two sides.

As the utility model discloses it is preferred, the removable cover subassembly is including spaning the girder on the cylinder body, rotating respectively and connecting in the first removable cover and the second removable cover of girder both sides, locating the tie-beam on inner casing and the outer casing, locating manhole cover between girder and the tie-beam, rotating and connecting in the third removable cover of manhole cover, locating the fourth removable cover between tie-beam and the inner casing, rotating and connecting in the fifth removable cover of fourth removable cover. The removable cover subassembly mainly sets up in the position department that probably takes place to interfere at the cylinder body in-process of demolising to lift the emergence of avoiding interfering at any time, the manhole apron below is the cat ladder in addition, and the staff of being convenient for gets into half cylinder body down and inspects.

As the utility model discloses it is preferred, manhole cover both sides all are equipped with the fastener, all be equipped with the cooperation on girder and the tie-beam the support piece of fastener. The structure ensures stability in positioning of the manhole cover plate.

As the utility model discloses it is preferred, be equipped with the hoisting point on girder, first removable cover and the second removable cover. The assembly formed by the three components has large mass, so that the assembly is inconvenient to carry manually, and a lifting point is arranged so as to be convenient to carry by using an auxiliary tool.

As the utility model discloses it is preferred, the third removable cover is located between second removable cover and the manhole apron.

As the utility model discloses preferred, the rotation is connected specifically for connecting through the loose-leaf. The rotary connecting structure is stable and reliable and can rotate flexibly.

As the utility model discloses it is preferred, fixed apron subassembly includes the outer jar of apron of polylith inner casing apron and polylith.

The utility model has the advantages that:

1. the split holes in the low-pressure cylinder can be completely covered, so that people and items can be prevented from falling;

2. the use of a large number of scaffolds can be reduced, and the working time of a main line for overhauling the steam turbine is saved;

3. the middle split pedal fulcrum can be fully used after the low-pressure outer cylinder is opened, so that the operation of personnel on the inner cylinder body can be supported, and the inner cylinder opening and buckling cylinder is not interfered;

4. after the low-pressure inner cylinder is opened, an inner cylinder pedal can be laid in the low-pressure inner cylinder hole, so that the falling risk and the personnel operation risk are reduced.

Drawings

FIG. 1 is a schematic diagram of a half-side structure of a split pedal tool in a low pressure cylinder of a steam turbine according to the present invention;

FIG. 2 is a schematic view of an axial support assembly of a split pedal tool for a low-pressure cylinder of a steam turbine according to the present invention;

1. 19-a first removable cover; 2. 18-a main beam; 3. 17-a second removable cover; 4. 15-a third removable cover; 5. 14-manhole cover plate; 6. 16-a connecting beam; 7. 12-a fourth removable cover; 8. 13-a fifth removable cover; 9-a first outer cylinder cover plate; 10-a second outer cylinder cover plate; 11-a third outer cylinder cover plate; 29-a fourth outer cylinder cover plate; 20-a first inner cylinder cover plate; 21-a second inner cylinder cover plate; 22-a third inner cylinder cover plate; 23-a fourth inner cylinder cover plate; 24-a fifth inner cylinder cover plate; 25-a sixth inner cylinder cover plate; 26-a seventh inner cylinder cover plate; 27-an eighth inner cylinder cover plate; 28-ninth inner cylinder cover plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model provides a divide face footboard instrument in steam turbine low pressure jar, includes the axial supporting component of locating on interior jar and the outer jar fulcrum, lay on interior outer jar and reach removable cover subassembly and fixed apron subassembly on the axial supporting component. The axial support assembly is shown in fig. 2 and comprises a hanging member 31 and support beams 32 connected to two sides of the hanging member through bolts 33, wherein the hanging member 31 is hung on the inner cylinder pivot and the outer cylinder pivot.

Specifically, the cylinder body has a left-right symmetrical structure, so the arrangement of the left side and the right side of the pedal tool is the same, fig. 1 shows a structural schematic diagram of a half-side pedal tool, and the half-side pedal tool is also of a symmetrical structure. The movable cover plate assembly comprises a main beam 2 (18) which stretches across the cylinder body, a first movable cover plate 1 (19) and a second movable cover plate 3 (17) which are respectively connected with the two sides of the main beam 2 (18) in a rotating way through hinges, a connecting beam 6 (16) arranged on the inner cylinder and the outer cylinder, a manhole cover plate 5 (14) arranged between the main beam 2 (18) and the connecting beam 6 (16), a third movable cover plate 4 (15) connected with the manhole cover plate 5 (14) in a rotating way through hinges, a fourth movable cover plate 7 (12) arranged between the connecting beam 6 (16) and the inner cylinder, and a fifth movable cover plate 8 (13) connected with the fourth movable cover plate 7 (12) in a rotating way through hinges. Fasteners are arranged on both sides of the manhole cover plate 5 (14), and supporting pieces matched with the fasteners are arranged on the main beam 2 (18) and the connecting beam 6 (16). The main beam 2 (18), the first movable cover plate 1 (19) and the second movable cover plate 3 (17) are provided with hanging points. The third movable cover plate 4 (15) is arranged between the second movable cover plate 3 (17) and the manhole cover plate 5 (14). The fixed cover plate assembly comprises a first outer cylinder cover plate 9, a second outer cylinder cover plate 10, a third outer cylinder cover plate 11, a fourth outer cylinder cover plate 29, a first inner cylinder cover plate 20, a second inner cylinder cover plate 21, a third inner cylinder cover plate 22, a fourth inner cylinder cover plate 23, a fifth inner cylinder cover plate 24, a sixth inner cylinder cover plate 25, a seventh inner cylinder cover plate 26, an eighth inner cylinder cover plate 27 and a ninth inner cylinder cover plate 28.

The installation step:

1. the first movable cover plate 1 and the second movable cover plate 3 are connected with the main beam 2 through hinges, the main beam 2 is supported on the cylinder body in a crossing manner, and the assembly is provided with a lifting point which can be carried by a travelling crane in an auxiliary manner;

2. the connecting beam 6 is lapped on the inner cylinder and the outer cylinder;

3. the manhole cover plate 5 is connected with the third movable cover plate 4 through hinges, and fasteners on two sides of the manhole cover plate 5 are supported at the positions of the main beam 2 and the connecting beam 6 corresponding to the supporting pieces;

4. the fourth movable cover plate 7 is connected with the fifth movable cover plate 8 through hinges, one side of the fourth movable cover plate is supported on the connecting beam 6, and the other side of the fourth movable cover plate is supported on the inner cylinder pivot;

5. assembling the axial support assembly, and hanging the assembly on an inner cylinder fulcrum and an outer cylinder fulcrum;

6. the first outer cylinder cover plate 9 is directly laid on the lower half support of the inner cylinder;

7. the second outer cylinder cover plate 10 and the third outer cylinder cover plate 11 are directly paved on the axial support component;

8. the method for laying the parts 12 to 19 is the same as that for laying the parts 1 to 8, and the arrangement of pedals on the left side and the right side of the cylinder body is the same;

9. the fourth outer cylinder cover plate 29 can be directly laid after the upper half part of the outer cylinder is dismantled;

10. the second movable cover plates 3 and 17 and the fifth movable cover plates 8 and 13 need to be lifted when the upper half of the inner cylinder is not dismounted, so that interference is avoided; the manhole cover plate 5 is a reserved population, a ladder stand is arranged below the manhole cover plate, and the manhole cover plate can be opened temporarily when entering the lower half cylinder body for inspection;

11. after the upper inner cylinder plate is removed, a first inner cylinder cover plate 20, a second inner cylinder cover plate 21, a third inner cylinder cover plate 22, a fourth inner cylinder cover plate 23, a fifth inner cylinder cover plate 24, a sixth inner cylinder cover plate 25, a seventh inner cylinder cover plate 26, an eighth inner cylinder cover plate 27 and a ninth inner cylinder cover plate 28 are laid.

The above description is only the specific embodiment of the preferred embodiment of the present invention, and this specific embodiment is based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. The utility model provides a divide face footboard instrument in steam turbine low-pressure jar which characterized in that, including locate the axial supporting component on inner casing and outer jar fulcrum, lay on the inner and outer jar and movable cover plate subassembly and the fixed apron subassembly on the axial supporting component.

2. The tool of claim 1, wherein the axial support assembly comprises a hanger and support beams disposed on two sides of the hanger, and the hanger is hung on the inner and outer cylinder pivot points.

3. The tool according to claim 1, wherein the removable cover assembly comprises a main beam spanning the cylinder body, a first removable cover and a second removable cover rotatably connected to two sides of the main beam, a connecting beam disposed on the inner cylinder and the outer cylinder, a manhole cover disposed between the main beam and the connecting beam, a third removable cover rotatably connected to the manhole cover, a fourth removable cover disposed between the connecting beam and the inner cylinder, and a fifth removable cover rotatably connected to the fourth removable cover.

4. The tool of claim 3, wherein fasteners are disposed on both sides of the manhole cover plate, and the main beam and the connecting beam are provided with supporting members for engaging the fasteners.

5. The tool of claim 3, wherein the main beam, the first removable cover, and the second removable cover have hanging points.

6. The split pedal tool for a low pressure cylinder of a steam turbine as claimed in claim 3, wherein the third removable cover is disposed between the second removable cover and the manhole cover.

7. The tool of claim 3, wherein the rotational connection is a hinge connection.

8. The split pedal tool for a low pressure steam turbine cylinder as claimed in claim 1, wherein the stationary cover plate assembly includes a plurality of inner cylinder cover plates and a plurality of outer cylinder cover plates.

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