JPH04116715U - Boiler tube wall thickness automatic measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] Eliminate the need for scaffolding and site workers, and
The aim is to improve economy, efficiency, safety, and accuracy without varying the degree of removal of attached ash, etc. [Structure] In the boiler tube wall thickness measuring means that measures the wall thickness after removing deposits on the outer surface, the upper part of the frame structure 1,
An upper clamp 32 and a lower clamp 33 that are installed at the lower part and are attached to and detached from the outer surface of the boiler tube 20, and a lifting mechanism that lifts and lowers either one of the clamps 32 and 33,
A rotating part ring 16 and a jet hammer are provided on the lifting member 11 which is installed at the upper end of the frame structure 1 and can be inserted into the boiler tube 20, and a rotating part ring 16 and a jet hammer are installed at the lower end of the frame structure 1 and can be inserted into the boiler tube 20. The rotating part ring 17 and the UT sensor 19 are provided on the raising/lowering member 12.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an automatic boiler tube wall thickness measuring device.

0002

[Conventional technology]

For example, as a means of confirming wall thickness deterioration due to aging of boiler water pipes, conventionally, Remove ash and rust from pipes using sandpaper, grinder, shot blast, etc. , After removing oxide scale, etc., the wall thickness of the pipe is measured using an ultrasonic sensor. It is known that

0003 However, such means have the following drawbacks. (1) Work scaffolding is required around multiple test tubes set high in a narrow space. This increases the cost and is therefore uneconomical. (2) The work is done at high places, which makes it difficult to work and there is a risk of workers falling. Efficiency and safety are not sufficient. (3) Removal of adhering ash, etc. from the test tube is done manually, so removal of adhering ash, etc. There are individual differences in the degree of oxidation, which makes quality control difficult.

0004

[Problem that the idea aims to solve]

This invention was proposed in view of these circumstances, and it eliminates the need for scaffolding and workers. Moreover, there is no variation in the degree of removal of attached ash, etc., and therefore it is economical, efficient, safe, and The purpose of this invention is to provide an automatic boiler tube wall thickness measuring device with excellent accuracy.

[0005]

[Means to solve the problem]

To this end, the present invention is designed to measure the wall thickness of boiler tubes after removing deposits on the outer surface. The wall thickness measuring means is installed at the top and bottom of the frame structure and measures the outside surface of the boiler tube. A clamp mechanism that attaches to and detaches from the A lowering mechanism and a lifting mechanism installed at one end of the above frame structure that can be inserted into the boiler tube. A deposit removal mechanism is installed at the other end of the frame structure and can be inserted into the boiler tube. It is characterized by comprising a wall thickness measuring mechanism disposed on the raising and lowering mechanism.

[0006]

[Effect]

With the above configuration, there is no need for scaffolding or workers, and it is easy to remove adhering ash etc. Boiler tube wall thickness automatic, with no sticking and therefore excellent in economy, efficiency, safety and precision A measuring device can be obtained.

[0007]

【Example】

One embodiment of the present invention will be explained with reference to the drawings. First, in the front view of FIG. 3 is a device frame structure with a rectangular outer shape and handles 2 protruding from each side, and 3 is a frame structure. The upper clamp mounting member is loosely fitted to the upper part of 1 so as to be able to slide in the vertical direction, and 4 is the upper part. A vertical motor that is fixed to the center of the clamp mounting member 3 and has a main gear 5 fitted to its upper end. , 6 and 7 are right-handed and left-handed screws whose upper and lower ends are fixed to the upper and lower parts of the frame structure 1, respectively. The center holes of the threaded rods 8 and 9 are screwed into the feed screw rods 6 and 7, respectively, and the outer periphery is a driven gear that meshes with the left and right sides of the main gear 5, and 10 is a lower part fixed to the lower part of the frame structure 1. This is a clamp mounting member. 11 and 12 are respectively pivotally supported at the upper and lower ends of the frame structure 1 via horizontal shafts, and C is located at the center. The raising/lowering members 13 and 14 each having a letter-shaped recessed portion correspond to the raising/lowering members 11 and 12, respectively. A rotary actuator for raising and lowering, 15 is a recessed part of the raising and lowering members 11 and 12 a horizontal motor for rotating a rotating part ring 16, 17 coaxially supported on the Reference numeral 8 denotes a pair of left and right jet handles for removing ash, which are arranged opposite to the rotating ring 16. 19 is a pair of left and right U for wall thickness measurement disposed opposite to the rotating portion ring 17. It is a T sensor.

[0008] Next, in the plan view of FIG. 2, 20 indicates a plurality of established boiler tubes to be tested, In the enlarged plan view and side view of FIG. 4, 21 has a semicircular recess at the tip, and It is a fixed clamp fixed to the upper clamp mounting member 3, and there are A vertical hole 22 is bored in each, and compressed air is supplied and discharged from the outside around the semicircular recess. A flexible air bag 23 made of rubber is provided. 24, a vertical hole 25 at the base is connected to one side of the tip of the fixed clamp 21 via a fixed vertical pin 26. The vertical hole 27 at the end is connected to the tip of the fixed clamp 21 through the vertical pin 28. A semicircular movable clamp that can be fixed on the other side, and its inner circumference has an external A flexible air bag 29 made of rubber is provided to which compressed air is supplied and discharged. 30 is hard A flap is provided on the other side of the fixed clamp 21 and on the other side of the movable clamp 24. This is a locking metal fitting that can fix the hook 31.

[0009] Note that the lower clamp mounting member 10 is also the same as the upper clamp mounting member 3. A fixed clamp 21 and a movable clamp 24 are attached in this manner. Furthermore, in the side view of FIG. 5, 32 indicates the upper clamp mounting member 3 and the fixed clamp 2. 1. Upper clamp formed by movable clamp 24 etc., 33 is lower clamp The lower part formed by the attachment member 10, fixed clamp 21, movable clamp 24, etc. It's a clamp.

0010 In such a device, in order to measure the wall thickness of the boiler tube 20, first, as shown in FIG. As shown in (1), a worker attaches the upper clamp 32 of the equipment to the boiler tube 20 on the floor. Attach the frame structure 1 etc. via the upper and lower clamps 33, and then as shown in the same figure (2). Then, remove the compressed air from the flexible air pipes 23 and 29 of the lower clamp 33 by remote control. Loosen the grip on the clamp 33 and rotate the vertical motor 4 in a fixed direction by remote control. Raise the frame structure 1, lower clamp 33, etc., and then lower the lower part as shown in (3) in the same figure. Compressed air is supplied to the flexible air pipes 23 and 29 of the clamp 33 to grip the lower clamp 33. Tighten the grip, remove the compressed air from the flexible air pipes 23 and 29 of the upper clamp 32, and remove the upper clamp. Loosen the grip on the lamp 33, rotate the vertical motor 4 in a certain direction, and tighten the upper clamp 3. 3, and as shown in (4) in the same figure, perform the operation described in (2) in the same figure. While repeating these operations one after another, the device is raised like an inchworm.

[0011] Then, as shown in the side view of FIG. When the upper clamp 33 is reached, the upper clamp 33 is tightened, and the tilting member 11 is tilted down and rotated. The boiler tube 20 is sandwiched between the partial rings 16 and the rotating partial ring 16 and the jet handle After operating the mer 18 to remove adhering ash, etc., raise the device again and remove the rotating part. Once the minute ring 17 reaches the wall thickness measurement position, tighten the grip of the upper clamp 33. , after tilting the raising member 12 and sandwiching the boiler tube 20 between the rotating part ring 17, The rotation part ring 17 and the UT sensor 19 are activated to measure the pipe thickness. In addition, the device When removing the boiler tube 20 from the boiler tube 20, perform the above procedure in reverse.

0012 According to the apparatus of this embodiment, the following effects can be achieved. (1) The equipment can be moved up and down along the boiler tubes, eliminating the need for work scaffolding. Therefore, economical efficiency is improved. (2) The device automatically removes deposits and measures wall thickness, so the work is stable. This eliminates the risk of workers falling, thus improving work accuracy, efficiency, and safety. Totality improves.

[0013]

[Effect of the idea]

In short, according to the present invention, a boiler whose wall thickness is measured after removing deposits from the outer surface. -In the pipe wall thickness measuring means, the boiler tubes are installed at the top and bottom of the frame structure respectively. A clamp mechanism that attaches to and detaches from the outside surface, and one of the above clamp mechanisms that can be raised or lowered. and a lifting mechanism installed at one end of the above frame structure that can be inserted into the boiler tube. A deposit removal mechanism is installed, and the other end of the frame structure is equipped with a mechanism that can be inserted into the boiler tube. Equipped with a wall thickness measuring mechanism installed in the raising and lowering mechanism of the Noh, it is possible to is not required, and there is no variation in the degree of removal of adhering ash, etc., and therefore it is economical, efficient, and safe. This invention is industrially useful because it provides an automatic boiler tube wall thickness measuring device with excellent integrity and accuracy. It is extremely useful.

[0014]

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a partially enlarged view showing the fixing clamp and the like in FIG. 2;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a side view showing how to raise and lower the device of the present invention.

FIG. 6 is a side view showing a method for removing ash and a method for measuring wall thickness using the device of the present invention.

[0015]

[Explanation of symbols]

1 Frame structure 2 Handle 3 Upper clamp mounting member 4 Vertical motor 5 Main gear 6 Feed screw rod 7 Feed screw rod 8 Follower gear 9 Followed gear 10 Lower clamp mounting member 11 Raising member 12 Raising member 13 Rotary actuator 14 Rotary actuator 15 Horizontal motor 16 Rotating part ring 17 Rotating part ring 18 Jet Hammer 19 UT sensor 20 Boiler tube 21 Fixed clamp 22 Pit 23 Flexible air bag 24 Movable clamp 25 Pit 26 Fixed vertical pin 27 Pit 28 Vertical pin for insertion and removal 29 Flexible air bag 30 Locking metal fittings 31 Hook 32 Upper clamp 33 Lower clamp

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Ken Fujita 2-1-1 Shinhama, Arai-cho, Takasago City, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd. Takasago Research Center (72) Creator Yoshihisa Nishikawa 2-1-1 Shinhama, Arai-cho, Takasago City, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd. Takasago Research Center

Claims (1)

[Scope of utility model registration request] Claim 1: A boiler tube wall thickness measuring means for measuring the wall thickness after removing deposits on the outer surface, the upper part of the frame structure;
A clamp mechanism is installed at the bottom and can be attached to and removed from the outer surface of the boiler tube, an elevating mechanism that raises or lowers one of the above-mentioned clamp mechanisms, and a lifting mechanism that is installed at one end of the frame structure and can be inserted onto the boiler tube. A boiler tube wall thickness characterized by comprising: a deposit removal mechanism installed in the frame structure; and a wall thickness measuring mechanism installed in a tilting mechanism installed at the other end of the frame structure and capable of being externally inserted into the boiler tube. Automatic measuring device.