Erecting device of dial indicator for steam turbine maintenance

Abstract

The invention discloses an erecting device of a dial indicator for steam turbine maintenance, which is characterized in that the outer surface of an expansion support is movably connected with an expansion sleeve, one end of the expansion support is provided with a second inner concave seat, the center of the second inner concave seat is provided with a long screw hole, the long screw hole is in threaded connection with a locking bolt, the inside of the expansion sleeve is movably connected with an expansion pressing plate, and the expansion pressing plate is in threaded connection with the locking bolt. A through hole is formed in the outer surface of the expansion pressing plate, a locking bolt installed on the expansion support is screwed through a T-shaped socket spanner, the expansion pressing plate is made to continuously get close to the expansion support, the expansion support is fixed, the end, provided with the disc magnetic base, of the supporting and measuring rod is connected with the end of the corresponding side of the expansion support, and then the expansion support is fixed. The rotary sleeve rod is screwed to enable the linkage shifting rod to drive a switch of the disc magnetic base, the disc magnetic base is effectively attracted to the expansion support, the dial indicator is erected on the dial indicator installation rod through the indicator frame, the coupling of the steam turbine is measured, and efficient and convenient erecting of the dial indicator is achieved when the coupling of the steam turbine is overhauled and measured.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment maintenance, in particular to a device for mounting a dial indicator for steam turbine maintenance. Background Art

[0002] Steam turbines are the main equipment in modern thermal power plants. The quality of their operation is directly related to the safe and continuous production level of power plants. At present, with the rapid development of my country's power industry, the number of steam turbines and the capacity of single units are also growing rapidly, and the possibility of problems with the turbine cylinder bearings is also relatively high. Therefore, maintenance often requires disassembly and maintenance of the wheels and measurement of the wheel centers. In order to better find the center during maintenance, it is usually necessary to set up a dial indicator. However, ordinary dial indicator stands are not stable enough and frequently shake during the measurement process, resulting in large errors in the measurement results. In order to solve the above shortcomings and improve the stability and efficiency of the dial indicator when measuring steam turbines, this solution proposes a special dial indicator stand. Summary of the Invention

[0003] The object of the present invention is to at least solve one of the technical problems existing in the prior art and provide a setting device for a dial indicator for steam turbine maintenance. When measuring the pair of wheels of the steam turbine, the expansion support, the expansion pressure plate and the expansion sleeve are placed together in the turning hole of the pair of wheels, and the locking bolt installed on the expansion support is tightened by a T-shaped socket wrench, so that the expansion pressure plate is continuously close to the expansion support, thereby causing the expansion sleeve to expand and fix the expansion support. According to the measuring direction, the end of the supporting measuring rod with the disc magnetic seat is engaged with the end portion on the corresponding side of the expansion support, and the rotating sleeve rod is turned to make the linkage lever drive the switch of the disc magnetic seat, so that the disc magnetic seat is effectively adsorbed on the expansion support, and the dial indicator is set on the dial indicator mounting rod through the meter stand to measure the pair of wheels of the steam turbine, thereby realizing efficient and convenient setting of the dial indicator during the maintenance and measurement of the pair of wheels of the steam turbine.

[0004] The present invention also provides a mounting device for a dial indicator for steam turbine maintenance, comprising: an expansion support, an outer surface of the expansion support being movably connected to an expansion sleeve, one end of the expansion support being provided with a second inner recess, the center of the second inner recess being provided with a long screw hole, the long screw hole being threadedly connected to a locking bolt, the interior of the expansion sleeve being movably connected to an expansion pressure plate, the outer surface of the expansion pressure plate being provided with a through hole, the outer surface of the hexagonal head of the locking bolt being provided with a center connecting hole 1, the outer surface of the hexagonal head of the locking bolt being provided with a positioning hole 2, the other end of the expansion support being provided with a first inner recess, the center of the first inner recess being fixedly connected to a hexagonal clamping joint, the outer surface of the hexagonal clamping joint being provided with a center connecting hole 2, and the outer surface of the hexagonal clamping joint being provided with a positioning hole 1; The outer surface of the rotary table is fixedly connected to the rotary table, and the outer surface of the rotary table is fixedly connected to the rotary table.

[0005] According to the present invention, a device for mounting a dial indicator for steam turbine maintenance is provided. The outer surface of the expansion sleeve is provided with a deformation fracture. The contact surface between the inner wall of the expansion sleeve and the expansion pressure plate is a tapered surface. The outer surface of the expansion pressure plate is also a tapered surface. The deformation fracture effectively expands the expansion sleeve. The contact areas between the expansion pressure plate and the expansion sleeve are each tapered, so that the expansion sleeve can be effectively expanded after mutual compression.

[0006] According to the present invention, a device for mounting a dial indicator for steam turbine maintenance comprises a through-hole located at the center of an expansion platen, and a locking bolt extending through the through-hole connects to the long screw hole. This positioning of the through-hole at the center of the expansion platen ensures easy centering of the entire device after installation. As the locking bolt is continuously screwed into the long screw hole, the expansion platen is driven toward the tensioning support.

[0007] According to the present invention, a mounting device for a dial indicator for steam turbine maintenance is provided. The contact surface between the expansion support and the expansion sleeve is a conical surface. The diameters of the end surfaces of the expansion support and the expansion pressure plate where they approach each other are equal, and the diameters of the end surfaces where they are away from each other are equal. The outer surface of the expansion sleeve is cylindrical and has equal outer diameters at the top and bottom. The conical contact surface between the expansion support and the expansion sleeve allows the expansion sleeve to be effectively expanded by the conical surface structure when it is squeezed by the expansion pressure plate and moved on the expansion support. The diameters of the end surfaces of the expansion support and the expansion pressure plate where they approach each other and are away from each other are equal. This facilitates installation inside the turning hole of the turbine wheel. Secondly, the expansion sleeve is evenly matched when the expansion sleeve is squeezed and expanded by the expansion support, so that the outer diameter changes evenly and synchronously during the expansion process.

[0008] According to the present invention, a mounting device for a turbine maintenance dial indicator comprises a hollow rotating sleeve with a rubber grip fixedly attached to the end surface of the rotating sleeve. The supporting measuring rod and the rotating sleeve are coaxially located. The rubber grip increases friction with the hand, facilitating rotation of the rotating sleeve.

[0009] According to the present invention, a mounting device for a turbine maintenance dial indicator comprises a disc magnetic base movably connected to a first recessed seat and a second recessed seat, a hexagonal recessed clamping seat movably connected to the hexagonal head of the locking bolt and the hexagonal clamping joint, and a positioning pin mutually engaging with positioning hole 1 and positioning hole 2. This allows the support measuring rod to be installed at both ends of the expansion support according to measurement requirements. During installation, the fixed space and the mutually engaging clamping seats enable precise alignment, effectively improving measurement accuracy.

[0010] According to the installation device of a dial indicator for steam turbine maintenance provided by the present invention, the socket head of the T-shaped socket wrench matches the specifications of the hexagonal screw head of the locking bolt, making it convenient to tighten and loosen the locking bolt.

[0011] According to the present invention, a mounting device for a steam turbine maintenance dial indicator comprises a central latch fixedly connected to the inner surface of the hexagonal concave mounting base. The central latch is movably connected to the first and second central connecting holes, respectively. The central latch connects the first and second central connecting holes, respectively, so that the supporting measuring rod is centered during installation, achieving centering and improving measurement accuracy.

[0012] Compared with the prior art, the present invention provides a device for mounting a dial indicator for steam turbine maintenance. When measuring the counter-wheel of the steam turbine, the expansion support, the expansion pressure plate and the expansion sleeve are placed together in the turning hole of the counter-wheel. The locking bolt installed on the expansion support is tightened with a T-shaped socket wrench, so that the expansion pressure plate is continuously approached to the expansion support, thereby causing the expansion sleeve to expand and the expansion support to be fixed.

[0013] Compared with the prior art, the present invention provides a device for mounting a dial indicator for steam turbine maintenance. According to the measuring orientation, one end of the supporting measuring rod with the disc magnetic seat is connected to the end portion on the corresponding side of the expansion support. The rotating sleeve rod is twisted to make the linkage lever drive the switch of the disc magnetic seat, so that the disc magnetic seat is effectively adsorbed on the expansion support. The dial indicator is mounted on the dial indicator mounting rod through the meter stand to measure the turbine's pair of wheels, thereby realizing efficient and convenient mounting of the dial indicator during maintenance and measurement of the turbine's pair of wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples; Figure 1This is an overall structural diagram of a mounting device for a steam turbine maintenance dial indicator according to the present invention; Figure 2 A top view of a mounting device for a steam turbine maintenance dial indicator according to the present invention; Figure 3 A bottom view of a mounting device for a steam turbine maintenance dial indicator according to the present invention; Figure 4 This is an exploded view of a device for mounting a dial indicator for steam turbine maintenance according to the present invention; Figure 5 A cross-sectional view of a device for mounting a dial indicator for steam turbine maintenance according to the present invention; Figure 6 This is a schematic diagram of the bottom structure of a disc magnetic base of a mounting device for a dial indicator for steam turbine maintenance according to the present invention; Figure 7 The present invention is a schematic structural diagram of the hexagonal clamp joint of a mounting device for a dial indicator for steam turbine maintenance.

[0015] Legend: 1. Support measuring rod; 2. Expansion support; 3. Expansion sleeve; 4. Expansion pressure plate; 5. Locking bolt; 6. Dial indicator mounting rod; 7. Hexagonal clamping joint; 8. First recessed seat; 9. Through hole; 10. Long screw hole; 11. Deformation fracture; 12. T-shaped socket wrench; 13. Disc magnetic seat; 14. Rotating seat; 15. Linkage lever; 16. Rotating sleeve; 17. Rubber grip; 18. Meter stand; 19. Dial indicator; 20. Protective cover; 21. Wrench slot; 22. Center connection hole 1; 23. Hexagonal recessed clamping seat; 24. Positioning hole 1; 25. Positioning hole 2; 26. Second recessed seat; 27. Positioning pin; 28. Center connection hole 2; 29. ​​Center pin. DETAILED DESCRIPTION

[0016] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0017] Reference Figure 1-7An embodiment of the present invention provides a mounting device for a turbine maintenance dial gauge, comprising an expansion support 2, which provides both support and fixation. The contact surface between the expansion support 2 and the expansion sleeve 3 is conical. The diameters of the end faces of the expansion support 2 and the expansion plate 4, where they are close to each other, are equal, while the diameters of the end faces of the expansion support 2 and the expansion plate 4, where they are farther apart, are equal. The outer surface of the expansion sleeve 3 is cylindrical, with equal outer diameters at the top and bottom. The outer surface of the expansion support 2 is movably connected to the expansion sleeve 3. When the expansion sleeve 3 is tightened, its outer diameter increases, thereby tightening the expansion sleeve 3 against the inner mounting point of the turbine wheel, effectively preventing its shaking and stabilizing the entire measurement support structure. The outer surface of the expansion sleeve 3 is provided with a deformation fracture 11, which gives the expansion sleeve 3 a cylindrical open structure, providing deformation conditions for its expansion. The inner wall of the expansion sleeve 3 and the contact surface with the expansion plate 4 are conical.

[0018] The outer surface of the expansion pressure plate 4 is a conical surface, and a second inner recess 26 is provided at one end of the expansion support 2. A long screw hole 10 is provided at the center of the second inner recess 26. The long screw hole 10 is provided to ensure that the locking bolt 5 has sufficient locking stroke. The long screw hole 10 is connected to the locking bolt 5 through a threaded connection. The internal movability of the expansion sleeve 3 is connected to the expansion pressure plate 4. A through hole 9 is provided on the outer surface of the expansion pressure plate 4. The through hole 9 is located at the center of the expansion pressure plate 4. The locking bolt 5 passes through the through hole 9 and is connected to the long screw hole 10. A center connecting hole 22 is provided on the outer surface of the hexagonal head of the locking bolt 5, and a positioning hole 25 is provided on the outer surface of the hexagonal head of the locking bolt 5 for positioning, which effectively prevents the support measuring rod 1 from rotating after installation. A first inner recess 8 is provided at the other end of the expansion support 2, and a hexagonal clip joint 7 is fixedly connected to the center of the first inner recess 8. A center connecting hole 28 is provided on the outer surface of the hexagonal clip joint 7, and a positioning hole 24 is provided on the outer surface of the hexagonal clip joint 7, which has the same function as the positioning hole 25, in order to prevent the support measuring rod 1 from rotating after installation.

[0019] The disc magnetic base 13 is an instrument primarily composed of a rotatable magnetic element, two magnetic yoke groups, and a non-magnetic block located between the two magnetic yoke groups. The disc magnetic base 13 has a cylindrical surface. A hexagonal concave retaining seat 23 is provided on its lower surface, with a locating pin 27 fixedly connected to its inner surface. A support measuring rod 1 is fixedly connected to its upper surface, one end of which is fixedly connected to a dial indicator mounting rod 6. A rotating sleeve 16 is rotatably connected to the outer surface of the dial indicator mounting rod 6. A rotating base 14 is fixedly connected to its upper surface, the outer surface of which is fixedly connected to the rotating sleeve 16. A linkage lever 15 is fixedly connected to the outer surface of the rotating sleeve 16, one end of which is movably connected to the switching switch of the disc magnetic base 13.

[0020] The outer surface of the dial indicator mounting rod 6 is detachably connected to a dial stand 18 for mounting a dial indicator 19. One end of the dial stand 18 is detachably connected to a dial indicator 19. The dial indicator 19 is a universal length measuring tool made of a precision rack and pinion mechanism, and is usually composed of a probe, a measuring rod, a shock-absorbing spring, a rack, a gear, a hairspring, a circular dial, and a pointer. The outer surface of the expansion sleeve 3 is detachably connected to a protective sleeve 20, which is used to protect the expansion support 2 and the expansion sleeve 3 when stored to prevent them from being hit, which would cause a change in accuracy during use. The protective sleeve 20 is made of plastic and is divided into two left and right parts. It is opened and closed by a hinged connection, and there is a buckle at the opening and closing point. The outer surface of the protective sleeve 20 is fixedly connected to a wrench slot 21, and the interior of the wrench slot 21 is detachably connected to a T-type socket wrench 12. The socket head of the T-type socket wrench 12 matches the specifications of the hexagonal screw head of the locking bolt 5. The interior of the rotating sleeve rod 16 is hollow, and a rubber grip 17 is fixedly connected to the end surface of the rotating sleeve rod 16 , supporting the measuring rod 1 and the rotating sleeve rod 16 at the same axis.

[0021] The disc magnetic base 13 is movably connected to the first and second recessed seats 8, 26, respectively. The hexagonal recessed retaining seat 23 is movably connected to the hexagonal head of the locking bolt 5 and the hexagonal retaining joint 7, respectively. The positioning pin 27 is respectively engaged with the first and second positioning holes 24, 25. A center latch 29 is fixedly connected to the inner surface of the hexagonal recessed retaining seat 23 and movably connected to the first and second center connection holes 22, 28, respectively.

[0022] Working principle: When in use, open the protective cover 20 and take out the expansion support 2, the expansion sleeve 3 and the expansion pressure plate 4, and put them into the turning hole on the wheel side surface of the turbine. Remove the T-type socket wrench 12 and use the T-type socket wrench 12 to tighten the locking bolt 5. At this time, the expansion pressure plate 4 pushes the expansion sleeve 3 to move, and the distance between the expansion pressure plate 4 and the expansion support 2 is constantly getting closer. Through the tapered structure of the outer surface of the expansion pressure plate 4 and the expansion support 2, and the inner wall of the expansion sleeve 3 The tapered structure causes the expansion sleeve 3 to deform and increase its outer diameter as the expansion plate 4 and the expansion support 2 approach each other, thereby clamping against the inner wall of the turning hole of the turbine counter-wheel. During the expansion of the expansion sleeve 3, the diameters of the expansion support 2 and the expansion plate 4 are equal when the ends approaching and when they are farther apart, so the outer diameter of the expansion sleeve 3 changes evenly and synchronously during expansion. After clamping, the support measuring rod 1 and the dial indicator mounting rod 6 are in the center position inside the turbine counter-wheel. According to the surface to be measured, the support measuring rod 1 is installed. When it is installed at one end of the first concave seat 8 corresponding to the expansion support 2, the disc magnetic seat 13 installed on the support measuring rod 1 is used and placed in the first concave seat 8. The angle is adjusted so that the hexagonal concave card seat 23 is engaged with the hexagonal card joint 7. At this time, the center pin 29 is inserted into the center connection hole 28, and the positioning pin 27 is also inserted into the positioning hole 1 24. The bottom surface of the disc magnetic seat 13 is in contact with the bottom surface of the first concave seat 8. The rotating sleeve rod 16 is twisted to make the linkage lever 15 drive the disc magnetic seat 13 to switch, so that the disc magnetic seat 13 starts magnetic attraction and firmly absorbs the expansion support 2. Finally, the dial indicator 19 is installed on the dial indicator mounting rod 6 through the meter frame 18 for use. When installed at one end of the second recessed seat 26 corresponding to the expansion support 2, use the disc magnetic seat 13 installed on the support measuring rod 1 and place it in the second recessed seat 26, adjust the angle so that the hexagonal recessed seat 23 is engaged with the locking bolt 5, at this time the center pin 29 is inserted into the center connecting hole 1 22, and the positioning pin 27 is also inserted into the positioning hole 2 25, the bottom surface of the disc magnetic seat 13 is fitted with the bottom surface of the second recessed seat 26, turn the rotating sleeve rod 16 to make the linkage lever 15 drive the disc magnetic seat 13 to switch, so that the disc magnetic seat 13 starts magnetically sucking the expansion support 2, and finally the dial indicator 19 is installed on the dial indicator mounting rod 6 through the meter frame 18 for use.

[0023] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A device for mounting a dial indicator for steam turbine maintenance, characterized in that: include: An expansion support (2), wherein the outer surface of the expansion support (2) is movably connected to an expansion sleeve (3), one end of the expansion support (2) is provided with a second inner recess (26), the center of the second inner recess (26) is provided with a long screw hole (10), the long screw hole (10) is threadedly connected to a locking bolt (5), the interior of the expansion sleeve (3) is movably connected to an expansion pressure plate (4), the outer surface of the expansion pressure plate (4) is provided with a through hole (9), the outer surface of the hexagonal head of the locking bolt (5) is provided with a center connection hole (1) (22), the outer surface of the hexagonal head of the locking bolt (5) is provided with a positioning hole (25), the other end of the expansion support (2) is provided with a first inner recess (8), the center of the first inner recess (8) is fixedly connected to a hexagonal clamping joint (7), the outer surface of the hexagonal clamping joint (7) is provided with a center connection hole (28), and the outer surface of the hexagonal clamping joint (7) is provided with a positioning hole (1) (24); A disc magnetic seat (13) is provided on the lower surface of the disc magnetic seat (13), a hexagonal concave card seat (23) is fixedly connected to the inner surface of the hexagonal concave card seat (23) with a positioning pin (27), an upper surface of the disc magnetic seat (13) is fixedly connected to a support measuring rod (1), one end of the support measuring rod (1) is fixedly connected to a dial indicator mounting rod (6), an outer surface of the dial indicator mounting rod (6) is rotatably connected to a rotating sleeve rod (16), an upper surface of the disc magnetic seat (13) is fixedly connected to a rotating seat (14), an outer surface of the rotating seat (14) and a rotating sleeve rod (16) are fixedly connected. ) is fixedly connected, the outer surface of the rotating sleeve rod (16) is fixedly connected to the linkage lever (15), one end of the linkage lever (15) is movably connected to the switching switch of the disc magnetic base (13), the outer surface of the dial indicator mounting rod (6) is detachably connected to the meter frame (18), one end of the meter frame (18) is detachably connected to the dial indicator (19), the outer surface of the expansion sleeve (3) is detachably connected to the protective sleeve (20), the outer surface of the protective sleeve (20) is fixedly connected to the wrench slot (21), and the interior of the wrench slot (21) is detachably connected to the T-shaped socket wrench (12).

2. The installation device for a steam turbine maintenance dial indicator according to claim 1, characterized in that: The outer surface of the expansion sleeve (3) is provided with a deformation fracture (11), the contact surface between the inner wall of the expansion sleeve (3) and the expansion pressure plate (4) is a conical surface, and the outer surface of the expansion pressure plate (4) is a conical surface.

3. The installation device for a steam turbine maintenance dial indicator according to claim 1, characterized in that: The through hole (9) is located at the center of the expansion pressure plate (4), and the locking bolt (5) passes through the through hole (9) and is connected to the long screw hole (10).

4. The installation device for a steam turbine maintenance dial indicator according to claim 1, characterized in that: The contact surface between the expansion support (2) and the expansion sleeve (3) is a conical surface. The diameters of the end faces of the expansion support (2) and the expansion pressure plate (4) that are close to each other are equal. The diameters of the end faces of the expansion support (2) and the expansion pressure plate (4) that are far away from each other are equal. The outer surface of the expansion sleeve (3) is cylindrical and has equal upper and lower outer diameters.

5. The installation device for a steam turbine maintenance dial indicator according to claim 1, characterized in that: The interior of the rotating sleeve rod (16) is hollow, and a rubber grip (17) is fixedly connected to the end surface of the rotating sleeve rod (16). The supporting measuring rod (1) and the rotating sleeve rod (16) are at the same axis.

6. The installation device for a dial indicator for steam turbine maintenance according to claim 1, characterized in that: The disc magnetic seat (13) is movably connected to the first inner recess seat (8) and the second inner recess seat (26), respectively; the hexagonal inner recess seat (23) is movably connected to the hexagonal head of the locking bolt (5) and the hexagonal clamping joint (7), respectively; and the positioning pin (27) is mutually clamped with the positioning hole 1 (24) and the positioning hole 2 (25).

7. The installation device for a steam turbine maintenance dial indicator according to claim 1, characterized in that: The socket head of the T-shaped socket wrench (12) matches the specifications of the hexagonal screw head of the locking bolt (5).

8. The installation device for a steam turbine maintenance dial indicator according to claim 1, characterized in that: The inner surface of the hexagonal concave card seat (23) is fixedly connected with a central latch (29), and the central latch (29) is movably connected to the central connecting hole 1 (22) and the central connecting hole 2 (28).

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