Jet nozzle chamber steam inlet insertion pipe turning clamp tool

Abstract

The utility model discloses a clamp tool for turning a steam inlet insertion pipe of a nozzle chamber, and belongs to the technical field of steam turbine nozzle chambers. The utility model discloses a clamp tool for turning a steam inlet insertion pipe of a nozzle chamber. The clamp tool comprises a bottom plate and a backrest vertically arranged on the bottom plate, a plurality of first cushion blocks are arranged on the backrest, round cushion blocks used for adjusting the perpendicularity of the steam inlet insertion pipe are arranged on the first cushion blocks, a plurality of supporting columns used for supporting the nozzle chamber are arranged below the first cushion blocks, square cushion blocks are arranged on one sides of the supporting columns, the nozzle chamber is attached to the backrest, and the pressing plate is arranged on the other side of the nozzle chamber. The backrest and the pressing plate are locked through a locking device, the nozzle chamber is fixed, and a balancing weight is installed on the side, where the nozzle chamber is not installed, of the bottom plate. The horizontal alignment and perpendicularity of the two sides of the nozzle chamber can be adjusted through the square cushion block and the round cushion block, then the nozzle chamber is fixed, then the device is installed on a lathe, the steam inlet insertion pipe is turned, and the requirements for size precision and form and location tolerance of various nozzle chamber steam inlet insertion pipes can be completely met.

Description

Technical Field

[0001] The utility model relates to the technical field of a turbine nozzle chamber, in particular to a nozzle chamber steam inlet pipe inserting vehicle fixture. Background Art

[0002] The high-pressure nozzle chamber is a horizontal, center-split structure. In a supercritical steam turbine unit, the high-pressure nozzle chamber is a core component, and its quality is directly related to the thermal efficiency of the unit. In the processing of the high-pressure nozzle chamber, the processing of the steam inlet pipe is the most difficult and requires the highest precision. The diameter size accuracy must meet ±0.005mm, the cylindricality ±0.005mm, and the verticality ±0.005mm.

[0003] Since the two steam inlet plugs on the nozzle chamber are eccentric structures, it is impossible to directly machine the nozzle chamber on a lathe. The applicant first used a boring and milling machine for machining. After multiple machining experiments, it was found that due to the vertical head problem of the boring shaft of the boring and milling machine, the machining accuracy of the steam inlet plug could not meet the technical requirements of the drawings. In order to solve this technical problem, the applicant developed a nozzle chamber steam inlet plug turning fixture, which can fix the nozzle chamber and turn the steam inlet plug on a lathe, so that the machined steam inlet plug meets the machining size and shape and position tolerance requirements of the drawings. Utility Model Content

[0004] The utility model aims to provide a nozzle chamber steam inlet pipe turning fixture, through the use of the device to meet the processing requirements of the high-pressure nozzle chamber steam inlet pipe of a supercritical steam turbine unit.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A nozzle chamber steam inlet pipe car fixture tooling comprises a base plate and a backrest vertically arranged on the base plate; a plurality of first pads are arranged on the backrest, a round pad for adjusting the verticality of the steam inlet pipe is arranged on the first pad, a plurality of support columns for supporting the nozzle chamber are arranged below the first pad, a square pad is arranged on one side of the support column, the nozzle chamber is attached to the backrest, a pressure plate is arranged on the other side of the nozzle chamber, and the backrest and the pressure plate are locked by a locking device to fix the nozzle chamber, and a counterweight is installed on the side of the base plate where the nozzle chamber is not installed.

[0007] According to a further technical solution, the circular pads are symmetrically arranged along the vertical center axis of the backrest, so that the verticality of the nozzle chamber can be easily adjusted during clamping.

[0008] According to a further technical solution, a plurality of support plates are provided on the back of the backrest to reinforce and support the backrest.

[0009] In a further technical solution, the square pad is L-shaped. In a further technical solution, the locking device includes a screw and a nut, the screw passes through the first mounting hole on the backrest, the nozzle chamber, and the second mounting hole on the pressure plate in sequence, and is locked by the nut to achieve the fastening of the nozzle chamber.

[0010] According to a further technical solution, a plurality of third mounting holes are provided on the base plate, and the counterweight is fastened by the cooperation of bolts with the third mounting holes. Beneficial Effects

[0011] Compared with the prior art, the utility model has the following significant advantages:

[0012] The utility model has a simple structure and is easy to operate. The device can adjust the horizontal alignment and verticality of the two sides of the nozzle chamber through square pads and round pads and then fix the nozzle chamber. Then the device is installed on a lathe to machine the steam inlet pipe, which can meet the processing of various high, medium and low pressure nozzle chamber steam inlet pipes such as high pressure nozzle chambers, and can fully meet the dimensional accuracy and shape and position tolerance requirements of various nozzle chamber steam inlet pipes. The utility model greatly reduces the cost of tooling and fixtures and improves processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the front view of the utility model (without the pressure plate);

[0014] Figure 2 It is a top view of the utility model (without the pressure plate);

[0015] Figure 3 for Figure 1 AA view in;

[0016] Figure 4 This is a schematic diagram of the structure of the fixed nozzle chamber of the utility model (without a pressure plate);

[0017] Figure 5 It is a top view of the fixed nozzle chamber of the utility model (without the pressure plate);

[0018] Figure 6 for Figure 4 AA view in (with pressure plate);

[0019] Markings in the figure: 1. Base plate, 2. Backrest, 3. First cushion block, 4. Round cushion block, 5. Support column, 6. Square cushion block, 7. Pressure plate, 8. Locking device, 9. Counterweight block, 10. Nozzle chamber, 11. Steam inlet plug, 12. Support plate, 13. Lathe clamping jaws, 14. Screw, 15. Nut, 16. First mounting hole, 17. Second mounting hole, 18. Third mounting hole, 19. Turning tool. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the embodiments and application examples. It should be pointed out that the embodiments are preferred implementations of the utility model, rather than limiting the scope of protection claimed for the utility model, and the application and use method of the utility model are not limited to the application examples. Example

[0021] like Figure 1-6 As shown, a nozzle chamber steam inlet pipe car fixture comprises a base plate 1 and a backrest 2 vertically arranged on the base plate 1; a plurality of first pads 3 are arranged on the backrest 2, and a round pad 4 for adjusting the verticality of the steam inlet pipe 11 entering the nozzle chamber 10 is arranged on the first pad 3, and a plurality of support columns 5 for supporting the nozzle chamber 10 are arranged below the first pad 3, and a square pad 6 is arranged on one side of the support column 5, so that the nozzle chamber 10 is attached to the backrest 2, and a pressure plate 7 is arranged on the other side of the nozzle chamber 10, and the backrest 2 and the pressure plate 7 are locked by a locking device 8 to fix the nozzle chamber 10, and a counterweight 9 is installed on the side of the base plate 1 where the nozzle chamber 10 is not installed.

[0022] The circular pads 4 are symmetrically arranged along the vertical center axis of the backrest 2, so that the verticality of the nozzle chamber 11 can be easily adjusted during clamping.

[0023] A plurality of support plates 12 are provided on the back of the backrest 2 to reinforce and support the backrest 2 .

[0024] The square pad 6 is L-shaped, which is more convenient to engage with the two ends of the nozzle chamber, and facilitates the quick alignment of the backrest and the nozzle chamber. The locking device 8 includes a screw 14 and a nut 15. The screw passes through the first mounting hole 16 on the backrest, the nozzle chamber, and the second mounting hole 17 on the pressure plate 7 in sequence, and is locked by the nut 15 to achieve the fastening of the nozzle chamber 10.

[0025] The bottom plate 1 is provided with a plurality of third mounting holes 18 , and the counterweight 9 is fastened by the cooperation of bolts with the third mounting holes 18 .

[0026] The working method of the utility model is as follows:

[0027] 1. The steam inlet plug end of the high-pressure nozzle chamber faces upward, and then the nozzle chamber is placed on the device, with the horizontal center plane of the nozzle chamber flat on the bottom plate, and the nozzle chamber is supported by a support column, and then the horizontal ends of the nozzle chamber are aligned through square pads. After adjusting the level, slowly push the nozzle chamber with a jack so that the steam outlet side of the nozzle chamber leans against the backrest through the round pad, and ensure that the center line of the steam inlet plug is vertical by grinding the round pad, and then tighten it with a pressure plate, and then tighten the screw and nut to fix the nozzle chamber on the backrest;

[0028] 2. Fix the device on the lathe through the lathe clamp 13, and turn the steam inlet pipe 11 through the turning tool 19;

[0029] 3. After turning the steam inlet pipe on one side, loosen the nut and the pressure plate, and move the steam inlet pipe on the other side of the nozzle chamber horizontally to the center of the backrest. At the same time, move the counterweight to the opposite side of the base plate to prevent the unbalanced centrifugal force generated during turning from affecting the verticality and cylindricity of the steam inlet pipe. Fix the nozzle chamber and then turn the other side.

Claims

1. A nozzle chamber steam inlet pipe clamping tooling, characterized in that: It includes a bottom plate and a backrest vertically arranged on the bottom plate; a plurality of first pads are arranged on the backrest, a round pad for adjusting the verticality of the steam inlet plug is arranged on the first pad, a plurality of support columns for supporting the nozzle chamber are arranged below the first pad, a square pad is arranged on one side of the support column, the nozzle chamber is attached to the backrest, a pressure plate is arranged on the other side of the nozzle chamber, and the backrest and the pressure plate are locked by a locking device to fix the nozzle chamber, and a counterweight is installed on the side of the bottom plate where the nozzle chamber is not installed.

2. A nozzle chamber steam inlet pipe inserting vehicle fixture according to claim 1, characterized in that: The circular cushion blocks are symmetrically arranged along the vertical center axis of the backrest.

3. The nozzle chamber steam inlet pipe inserting fixture according to claim 1 is characterized in that: The back side of the backrest is provided with a plurality of supporting plates.

4. The nozzle chamber steam inlet pipe inserting fixture according to claim 1 is characterized in that: The square pad is L-shaped.

5. The nozzle chamber steam inlet pipe inserting fixture according to claim 1 is characterized in that: The locking device comprises a screw and a nut. The screw passes through the first mounting hole on the backrest, the nozzle chamber, and the second mounting hole on the pressure plate in sequence, and is locked by the nut to achieve fastening of the nozzle chamber.

6. The nozzle chamber steam inlet pipe inserting fixture according to claim 1 is characterized by: The bottom plate is provided with a plurality of third mounting holes, and the counterweight is fastened by the cooperation of bolts with the third mounting holes.

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