Device for measuring molded line size of flow guide ring of steam turbine

Abstract

The invention relates to the technical field of steam turbine flow guide rings, and discloses a steam turbine flow guide ring profile size measuring device which comprises a chassis, a centering hole is formed in the middle of the chassis, a plurality of reinforcing ribs are fixedly installed on the top of the chassis, a vertical coordinatometer is fixedly installed on the inner side of the top end of each reinforcing rib, and a fixing sleeve is installed on the outer wall of each vertical coordinatometer in a sleeving mode. The top of the fixing sleeve is fixedly provided with a sleeve plate sleeved on the vertical coordinatometer, the inner diameter deviation of the flow guide ring at different circumferential positions on the same axial length can be obtained by rotating the horizontal coordinatometer, and the inner diameter deviation of the flow guide ring at different circumferential lengths can be obtained by raising or lowering the position of the fixing sleeve; in addition, after the measurement of the device is finished, according to the operation, the extension scale can be retracted into the horizontal coordinatometer again, and the water outlet is opened to discharge the counterweight water so as to reduce the weight of the device, so that convenience is provided for the storage and carrying of the device.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine guide rings, in particular to a device for measuring the profile dimensions of a steam turbine guide ring. Background Art

[0002] Guide rings are primarily used in the low-pressure cylinder of a steam turbine. Both the axial length and diameter of the guide ring can affect the aerodynamic performance of the exhaust cylinder. If the diameter is too small, the distance between the end of the guide ring and the guide cone is too small, reducing the diffuser outlet area. This will cause throttling of the exhaust steam as it passes through the diffuser outlet, increasing losses. If the diameter is too large, the exhaust steam will experience flow separation in the diffuser, similarly affecting diffuser performance and increasing losses. If the axial length is too small, the exhaust steam will not be sufficiently decelerated and diffused within the diffuser, resulting in significant residual velocity losses. If the axial length is too large, the distance between the guide ring and the side wall of the exhaust cylinder will be too close, preventing the exhaust steam from turning over in time and contacting the cylinder wall, resulting in significant energy losses. Therefore, the size of the guide ring must be strictly controlled during installation, and accurate measurement is particularly important.

[0003] Prior to welding, guide rings were typically measured using a template to determine the deviation in the profile dimensions. The axial length and diameter of the guide rings required measurement through a process of setting out, tracing points, marking lines, and then measuring the corresponding dimensions. This process was cumbersome and resulted in significant measurement errors. Therefore, a device for measuring the profile dimensions of steam turbine guide rings was proposed to address this issue. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and provide a device for measuring the size of a guide ring profile of a steam turbine.

[0005] The technical solution adopted by the present invention is as follows: a device for measuring the linear dimensions of a guide ring of a steam turbine, comprising a chassis, a centering hole being provided in the middle of the chassis, a plurality of reinforcing ribs being fixedly installed on the top of the chassis, a vertical coordinate ruler being fixedly installed on the inner side of the top end of the reinforcing rib, a fixed sleeve being provided on the outer wall of the vertical coordinate ruler, a sleeve plate being fixedly provided on the top of the fixed sleeve, a No. 1 bearing and a No. 2 bearing being fixedly provided on the upper and lower sides of the outer wall of the sleeve plate, a horizontal coordinate ruler being fixedly provided on the right side of the outer ring of the No. 1 bearing, a No. 1 display slot being provided in the middle of the front wall of the sleeve plate, and a No. 2 display slot being provided on the right side of the front wall of the sleeve plate. A pointer No. 1 pointing to the middle of the No. 1 display slot is provided on the side, a telescopic ruler is installed in a plug-in manner on the right end of the horizontal coordinate ruler, a locking sleeve is fixedly installed on the right side of the top of the horizontal coordinate ruler, a locking block that is clamped on the top of the telescopic ruler is slidably installed on the bottom of the lock sleeve, a fixing seat is fixedly installed below the right end of the telescopic ruler, a deviation ruler is installed in a plug-in manner on the right end of the fixing seat, a rolling ball is rotatably installed on the right end of the deviation ruler, the center line of the rolling ball and the No. 1 pointer are on the same horizontal line, a No. 3 display slot sleeved on the deviation ruler is fixedly installed below the right end of the telescopic ruler, and a No. 3 pointer is fixedly installed above the front wall of the No. 3 display slot.

[0006] In a preferred embodiment of the invention, a circle of counterweight water tanks is fixedly installed on the periphery of the chassis, and a water inlet and a water outlet are respectively provided on the top and below the side wall of the counterweight water tank.

[0007] In a preferred embodiment of the invention, a slot adapted to the vertical coordinate ruler is provided in the middle of the fixing sleeve and the sleeve plate, an extrusion block is slidably installed inside the left side of the fixing sleeve, and a rubber anti-slip pad facing the vertical coordinate ruler is provided on the right side of the extrusion block.

[0008] In a preferred embodiment of the invention, a limiting groove adapted to the extrusion block is provided inside the fixed sleeve, a screw knob is rotatably installed on the left side of the fixed sleeve through a No. 3 bearing, and the right end of the screw knob extends into the fixed sleeve and is threadedly connected to the extrusion block.

[0009] In a preferred embodiment of the invention, a reinforcing support is fixedly installed on the right side of the outer ring of the No. 2 bearing, and the upper right end of the reinforcing support is fixedly connected to the bottom of the horizontal coordinate ruler.

[0010] In a preferred embodiment of the invention, a telescopic slot compatible with the telescopic ruler is provided inside the horizontal coordinate ruler, a No. 2 display slot is provided on the right side of the front wall of the horizontal coordinate ruler, a No. 1 pointer is provided on the right side of the front wall of the horizontal coordinate ruler above the No. 2 display slot, a displacement limit slot compatible with the locking block is provided at the bottom of the lock sleeve, and the top of the locking block is fixedly connected to the displacement limit slot via a No. 1 return spring.

[0011] In a preferred embodiment of the invention, the top of the telescopic ruler is provided with linearly distributed slots, the locking block is snap-fitted into one of the slots, and the top of the locking block is fixedly mounted with a pull rod plugged into the top of the locking sleeve.

[0012] In a preferred embodiment of the invention, an elastic expansion slot adapted to the deviation ruler is provided on the right side of the fixing seat, and the left plug-in end of the deviation ruler is fixedly connected to the elastic expansion slot via a No. 2 return spring.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] In the present invention, through the above design, when using this device, first mark the center point of the guide ring on the horizontal position where the chassis needs to be placed, and then place the chassis at this position by aligning the marked point through the centering hole in the middle of the chassis. Then, open the water inlet on the counterweight water tank to fill water and increase the counterweight to improve the stability of the chassis. Then, according to the height pointed by the No. 1 pointer in the No. 1 display slot, slide the fixing sleeve to the axial height position of the measuring guide ring, that is, the axial length. After the height is determined, rotate the screw knob to drive the extrusion block to move to the right, so that the extrusion The rubber anti-skid pad on the right side of the block abuts against the left wall of the vertical coordinate ruler, so that the fixing sleeve is firmly fixed at the height position of the vertical coordinate ruler. The guide ring diameter is used to pull the telescopic ruler out a certain distance from the right end of the horizontal coordinate ruler to prepare for the diameter deviation measurement. Before the telescopic ruler is pulled out, the pull rod is first pulled upward to drive the lock block to move up and disengage it from the current slot. Then, the telescopic ruler is pulled out to the outside to a suitable distance and the pull rod is released. The lock block is then snapped into the slot at this time under the rebound of the No. 1 reset spring, thereby fixing the extended position of the telescopic ruler. The ball at the right end of the deviation scale below the scale will abut against the inner wall of the guide ring. Since the length of the horizontal coordinate ruler is fixed, the length reading pointed by the No. 1 pointer above the No. 2 display slot is combined with the length reading pointed by the No. 3 pointer on the No. 3 display slot to obtain the horizontal length of the straight line between the center line of the vertical coordinate ruler and the ball abutting against the inner wall of the guide ring. This length is then compared with the standard installation diameter of the guide ring to obtain the difference, and the installation deviation of the guide ring diameter at this height position, i.e., the axial length position, can be obtained. Finally, the installation position of the guide ring can be adjusted based on this deviation. Adjustment can be made. According to this principle, by rotating the horizontal coordinate ruler, the inner diameter deviation of the guide ring at different circumferential positions on the same axial length can be obtained. When the position of the fixed sleeve is raised or lowered, the inner diameter deviation of the guide ring at different circumferential lengths can be obtained, thereby greatly improving the guide ring installation measurement efficiency and measurement accuracy compared with traditional measurements. In addition, after the measurement of this device is completed, according to the above operation, the telescopic ruler can be retracted into the horizontal coordinate ruler, and the drain port on the counterweight water tank can be opened to discharge the counterweight water to reduce the weight of the device, thereby providing convenience for the storage and transportation of this device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural stereogram of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention working when measuring a guide ring;

[0017] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the middle part;

[0018] Figure 4 This is a schematic diagram of the internal structure of the fixing sleeve in the present invention;

[0019] Figure 5 Schematic diagram of the internal structure of the horizontal coordinate ruler in the present invention.

[0020] Figure 6 For the present invention Figure 1 A magnified schematic diagram of the structure of B

[0021] Markings in the figure: 1-chassis, 2-reinforcement rib, 3-counterweight water tank, 4-vertical coordinate ruler, 501-fixing sleeve, 502-extrusion block, 503-screw knob, 601-sleeve plate, 602-bearing No. 1, 603-bearing No. 2, 604-display slot No. 1, 605-pointer No. 1, 7-reinforced support, 801-horizontal coordinate ruler, 802-display slot No. 2, 803-pointer No. 1, 901-telescopic ruler, 902-slot, 101-locking sleeve, 102-locking block, 103-pull rod, 111-fixed seat, 112-deviation ruler, 113-rolling ball, 114-display slot No. 3, 115-pointer No. 3. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The following will be combined Figure 1-Figure 5 A device for measuring the size of a guide ring profile of a steam turbine according to an embodiment of the present invention is described in detail.

[0024] Example:

[0025] Reference Figure 1 、 2, 3, 4, a device for measuring the linear dimensions of a steam turbine guide ring, comprising a chassis 1, a centering hole being provided in the middle of the chassis 1, a plurality of reinforcing ribs 2 being fixedly installed on the top of the chassis 1, a circle of counterweight water tank 3 being fixedly installed on the outer periphery of the chassis 1, a water inlet and a drain outlet being provided on the top and under the side wall of the counterweight water tank 3 respectively, a vertical coordinate ruler 4 being fixedly installed on the inner side of the top of the reinforcing rib 2, a fixed sleeve 501 being sleeved on the outer wall of the vertical coordinate ruler 4, a sleeve plate 601 being sleeved on the top of the fixed sleeve 501 being fixedly installed, a slot being adapted for the vertical coordinate ruler 4 being provided in the middle of the fixed sleeve 501 and the sleeve plate 601, an extrusion block 502 being slidably installed on the inner side of the left side of the fixed sleeve 501, a rubber anti-slip pad facing the vertical coordinate ruler 4 being provided on the right side of the extrusion block 502, and the fixed sleeve 501 A limiting slide groove is provided inside to match the extrusion block 502. A screw knob 503 is rotatably installed on the left side of the fixed sleeve 501 through the No. 3 bearing. The right end of the screw knob 503 extends into the fixed sleeve 501 and is threadedly connected to the extrusion block 502. The outer wall of the sleeve plate 601 is fixedly installed with No. 1 bearing 602 and No. 2 bearing 603 on the upper and lower sides. A horizontal coordinate ruler 801 is fixedly installed on the right side of the outer ring of the No. 1 bearing 602, and a reinforcing support 7 is fixedly installed on the right side of the outer ring of the No. 2 bearing 603. The upper right end of the reinforcing support 7 is fixedly connected to the bottom of the horizontal coordinate ruler 801. A No. 1 display slot 604 is provided in the middle of the front wall of the sleeve plate 601. A No. 1 pointer 605 pointing to the middle of the No. 1 display slot 604 is set on the right side of the front wall of the sleeve plate 601, and a telescopic ruler 901 is plugged into the right end of the horizontal coordinate ruler 801.

[0026] Through the above design, when using this device, first mark the center point of the guide ring on the horizontal plane position where the chassis 1 needs to be placed, and then place the chassis 1 at this position by aligning the marked point through the centering hole in the middle of the chassis 1, then open the water inlet on the counterweight water tank 3 to fill water and increase the counterweight to improve the stability of the chassis 1, and then slide the fixing sleeve 501 to the axial height position of the guide ring, that is, the axial length, according to the height pointed by the No. 1 pointer 605 displayed in the No. 1 display slot 604. After the height is determined, rotate the screw knob 503 to drive the extrusion block 502 to move to the right, so that the rubber anti-slip pad on the right side of the extrusion block 502 abuts against the left wall of the vertical coordinate ruler 4, so that the fixing sleeve 501 is firmly fixed at the height position of the vertical coordinate ruler 4, and the diameter of the guide ring is used to pull the telescopic ruler 901 a certain distance from the right end of the horizontal coordinate ruler 801 to prepare for the diameter deviation measurement.

[0027] Reference Figure 1 、 2, 5, 6, the interior of the horizontal coordinate ruler 801 is provided with a telescopic slot adapted to the telescopic ruler 901, the right side of the front wall of the horizontal coordinate ruler 801 is provided with a second display slot 802, and the right side of the front wall of the horizontal coordinate ruler 801 is provided above the second display slot 802. A number one pointer 803 is provided, and a lock sleeve 101 is fixedly installed on the right side of the top of the horizontal coordinate ruler 801. A lock block 102 that is snap-fitted to the top of the telescopic ruler 901 is slidably installed at the bottom of the lock sleeve 101. A displacement limiting slot adapted to the lock block 102 is provided at the bottom of the lock sleeve 101. The top of the lock block 102 is fixedly connected to the displacement limiting slot by a number one return spring. The top of the telescopic ruler 901 is provided with linearly distributed card slots 902, and the lock block 102 is snap-fitted and installed in one of the card slots 9 02, a pull rod 103 plugged into the top of the lock sleeve 101 is fixedly installed on the top of the locking block 102, a fixed seat 111 is fixedly installed below the right end of the telescopic ruler 901, and a deviation ruler 112 is plugged into the right end of the fixed seat 111. An elastic telescopic groove adapted to the deviation ruler 112 is opened on the right side of the fixed seat 111, and the left plug-in end of the deviation ruler 112 is fixedly connected to the elastic telescopic groove through a No. 2 reset spring, and a ball 113 is rollingly installed on the right end of the deviation ruler 112, and the center line of the ball 113 is on the same horizontal line as the No. 1 pointer 605, and a No. 3 display slot 114 sleeved on the deviation ruler 112 is fixedly installed below the right end of the telescopic ruler 901, and a No. 3 pointer 115 is fixedly installed above the front wall of the No. 3 display slot 114.

[0028] With the above design, before the telescopic ruler 901 is pulled out, the pull rod 103 is first pulled upward to drive the locking block 102 to move up and disengage it from the current slot 902. Then, the telescopic ruler 901 is pulled outward to a suitable distance and the pull rod 103 is released, so that the locking block 102 is engaged into the slot 902 at this time under the rebound of the No. 1 return spring, thereby fixing the extended position of the telescopic ruler 901. At this time, the ball 113 at the right end of the deviation ruler 112 below the telescopic ruler 901 will abut against the inner wall of the guide ring. Since the length of the horizontal coordinate ruler 801 is fixed, the length reading is read by the pointing of the No. 1 pointer 803 above the No. 2 display slot 802, and then combined with the pointing of the No. 3 pointer 115 on the No. 3 display slot 114. The length reading is used to obtain the horizontal length of the straight line between the center line position of the vertical coordinate ruler 4 and the ball 113 abutting against the inner wall of the guide ring at this time. The length is then compared with the standard installation diameter of the guide ring to obtain the difference, and the installation deviation of the guide ring diameter at this height position, that is, the axial length position, can be obtained. Finally, the installation position of the guide ring can be adjusted according to this deviation. According to this principle, by rotating the horizontal coordinate ruler 801, the inner diameter deviation of the guide ring at different circumferential positions on the same axial length can be obtained. When the position of the fixing sleeve 501 is raised or lowered, the inner diameter deviation of the guide ring at different circumferential lengths can be obtained, thereby greatly improving the efficiency and measurement accuracy of the guide ring installation measurement compared with traditional measurements.

[0029] The implementation principle of the embodiment of the steam turbine guide ring dimension measuring device of the present application is as follows:

[0030] When using this device, first mark the center point of the guide ring on the horizontal plane position where the chassis 1 needs to be placed, and then place the chassis 1 at this position by aligning the marked point with the centering hole in the middle of the chassis 1. Then, open the water inlet on the counterweight water tank 3 to fill water and increase the counterweight to improve the stability of the chassis 1. Then, according to the height pointed by the No. 1 pointer 605 displayed in the No. 1 display slot 604, slide the fixing sleeve 501 to the axial height position of the measuring guide ring, that is, the axial length. After the height is determined, rotate the screw knob 503 to drive the extrusion block 502 to move to the right, so that the rubber anti-slip pad on the right side of the extrusion block 502 abuts against the left wall of the vertical coordinate ruler 4, so that the fixing sleeve 501 is firmly fixed at the height position of the vertical coordinate ruler 4, and the diameter of the guide ring is used to pull the telescopic ruler 901 a certain distance from the right end of the horizontal coordinate ruler 801 to prepare for the diameter deviation measurement.

[0031] Before the telescopic ruler 901 is pulled out, the pull rod 103 is first pulled upward to drive the locking block 102 to move up and disengage it from the current slot 902. Then, the telescopic ruler 901 is pulled outward to a suitable distance and the pull rod 103 is released, so that the locking block 102 is engaged in the slot 902 at this time under the rebound of the No. 1 return spring, thereby fixing the extended position of the telescopic ruler 901. At this time, the ball 113 at the right end of the deviation ruler 112 below the telescopic ruler 901 will abut against the inner wall of the guide ring. Since the length of the horizontal coordinate ruler 801 is fixed, the length reading pointed by the No. 1 pointer 803 above the No. 2 display slot 802 is combined with the length reading pointed by the No. 3 pointer 115 on the No. 3 display slot 114 to obtain the horizontal length of the straight line at the center line position of the vertical coordinate ruler 4 and the abutment of the ball 113 on the inner wall of the guide ring at this time. , and then compare the length with the standard installation diameter of the guide ring to get the difference, so as to get the installation deviation of the guide ring diameter at this height position, that is, the axial length position. Finally, the installation position of the guide ring can be adjusted according to this deviation. According to this principle, by rotating the horizontal coordinate ruler 801, the inner diameter deviation of the guide ring at different circumferential positions on the same axial length can be obtained. When the position of the fixed sleeve 501 is raised or lowered, the inner diameter deviation of the guide ring at different circumferential lengths can be obtained, thereby greatly improving the installation measurement efficiency and measurement accuracy of the guide ring compared with traditional measurements. In addition, after the measurement of this device is completed, according to the above operation, the telescopic ruler 901 can be retracted into the horizontal coordinate ruler 801, and the drain port on the counterweight water tank 3 is opened to discharge the counterweight water to reduce the weight of the device, thereby providing convenience for the storage and transportation of the device.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A device for measuring the size of a guide ring profile of a steam turbine, comprising a chassis (1), wherein a centering hole is provided in the middle of the chassis (1), and wherein: A plurality of reinforcing ribs (2) are fixedly mounted on the top of the chassis (1); a vertical coordinate ruler (4) is fixedly mounted on the inner side of the top of the reinforcing rib (2); a fixing sleeve (501) is sleeved on the outer wall of the vertical coordinate ruler (4); a sleeve plate (601) sleeved on the vertical coordinate ruler (4) is fixedly mounted on the top of the fixing sleeve (501); a first bearing (602) and a second bearing (603) are fixedly mounted on the upper and lower outer walls of the sleeve plate (601); a horizontal coordinate ruler (801) is fixedly mounted on the right side of the outer ring of the first bearing (602); a first display slot (604) is provided in the middle of the front wall of the sleeve plate (601); a first pointer (605) pointing to the middle of the first display slot (604) is provided on the right side of the front wall of the sleeve plate (601); and a second pointer (605) pointing to the middle of the first display slot (604) is provided on the right side of the horizontal coordinate ruler (801). A telescopic ruler (901) is plugged and installed at the end, a locking sleeve (101) is fixedly installed on the right side of the top of the horizontal coordinate ruler (801), a locking block (102) which is clamped on the top of the telescopic ruler (901) is slidably installed at the bottom of the locking sleeve (101), a fixing seat (111) is fixedly installed below the right end of the telescopic ruler (901), a deviation ruler (112) is plugged and installed at the right end of the fixing seat (111), a rolling ball (113) is rotatably installed at the right end of the deviation ruler (112), the center line of the rolling ball (113) and the first pointer (605) are located on the same horizontal line, a number three display slot (114) which is sleeved on the deviation ruler (112) is fixedly installed below the right end of the telescopic ruler (901), and a number three pointer (115) is fixedly installed above the front wall of the number three display slot (114).

2. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 1, characterized in that: A circle of counterweight water tanks (3) are fixedly mounted on the outer periphery of the chassis (1), and a water inlet and a water outlet are respectively arranged on the top and below the side wall of the counterweight water tank (3).

3. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 1, characterized in that: The middle parts of the fixing sleeve (501) and the sleeve plate (601) are both provided with slots adapted to the vertical coordinate ruler (4), an extrusion block (502) is slidably mounted inside the left side of the fixing sleeve (501), and a rubber anti-skid pad facing the vertical coordinate ruler (4) is arranged on the right side of the extrusion block (502).

4. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 3, characterized in that: The interior of the fixing sleeve (501) is provided with a limiting sliding groove adapted to the extrusion block (502); a screw knob (503) is rotatably mounted on the left side of the fixing sleeve (501) via a No. 3 bearing; the right end of the screw knob (503) extends into the fixing sleeve (501) and is threadedly connected to the extrusion block (502).

5. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 1, characterized in that: A reinforcing support (7) is fixedly installed on the right side of the outer ring of the second bearing (603), and the upper right end of the reinforcing support (7) is fixedly connected to the bottom of the horizontal coordinate ruler (801).

6. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 1, characterized in that: A telescopic slot adapted to the telescopic ruler (901) is provided inside the horizontal coordinate ruler (801), a second display slot (802) is provided on the right side of the front wall of the horizontal coordinate ruler (801), a first pointer (803) is provided on the right side of the front wall of the horizontal coordinate ruler (801) above the second display slot (802), a displacement limiting slot adapted to the locking block (102) is provided at the bottom of the locking sleeve (101), and a top end of the locking block (102) is fixedly connected to the displacement limiting slot via a first return spring.

7. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 1, characterized in that: The top of the telescopic ruler (901) is provided with linearly distributed card slots (902), the locking block (102) is snap-fitted into one of the card slots (902), and the top of the locking block (102) is fixedly mounted with a pull rod (103) plugged into the top of the locking sleeve (101).

8. A device for measuring the size of a steam turbine guide ring profile as claimed in claim 1, characterized in that: An elastic expansion slot adapted to the deviation ruler (112) is provided on the right side of the fixing seat (111), and a left plug-in end of the deviation ruler (112) is fixedly connected to the elastic expansion slot via a No. 2 return spring.

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