Ultrasonic thickness measurement auxiliary device for tail flue of power station boiler

Abstract

The invention provides an ultrasonic thickness measurement auxiliary device for a tail flue of a power station boiler. The ultrasonic thickness measurement auxiliary device comprises a sleeve unit, a pressure spring, a pressure applying shaft, an ultrasonic thickness measurement probe and an arc-shaped elastic sheet, the sleeve unit comprises a plurality of sleeves; a preset included angle is formed between the upper end and the lower end of the lowest sleeve; the pressure spring is arranged in the lowermost sleeve and is positioned at the included angle of the lowermost sleeve; the pressure applying shaft is arranged in the sleeve unit; the top of the pressure applying shaft is higher than the top of the uppermost sleeve; the arc-shaped elastic sheet is fixed at one end, far away from the pressure spring, of the ultrasonic thickness measuring probe, and the connecting point of the arc-shaped elastic sheet and the ultrasonic thickness measuring probe is positioned in the center of the convex surface of the arc-shaped elastic sheet. The thickness measuring device has the advantages of being reasonable in design and capable of effectively reaching the thickness measuring position, enlarging the thickness measuring range, achieving full contact between the probe and a pipeline, improving the stability of thickness measuring data, prolonging the service life of the probe and reducing the risk of personnel injury.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler maintenance equipment, and in particular relates to an ultrasonic thickness measurement auxiliary device for a tail flue of a power station boiler. Background Art

[0002] Thermal power generation accounts for a high proportion in the current energy structure. Thermal power plants are the energy supply bases for thermal power generation. Their safe and efficient operation is the key to ensuring a stable supply of energy. As an important component of the boiler, the tail flue of the power station boiler is a key channel for flue gas transportation. It has been in service for a long time in harsh environments such as high temperature, high humidity, corrosion, and soot blowing wear. The thickness of the pipe wall will be thinned due to the harsh service environment, among which soot blowing wear is often the most serious. In the context of long-term operation of the boiler, the pipes close to the upper layer have a higher probability of thinning, and this phenomenon is often more serious near the soot blower. If the thinned pipe section is not discovered and handled in time, it may cause serious accidents such as leakage and pipe burst, endangering the safety of personnel and equipment and causing economic losses. Therefore, regular and efficient and accurate inspection of the pipe wall thickness of the tail flue of the power station boiler is of great significance to ensuring equipment safety and stable operation of the power station.

[0003] At present, there are many thickness measurement methods in the market, such as electromagnetic induction method, X-ray method and mechanical measurement method. Based on the application scenario analysis of the tail flue of the power plant, considering the construction scenario and construction period, the thickness measurement method should have the characteristics of high efficiency, high precision, strong anti-interference ability and easy to carry. Electromagnetic induction thickness measurement has limitations in the application scenario of the tail flue because its accuracy is affected by surface oxides, coatings and edge effects; the X-ray method is difficult to promote on a large scale due to radiation safety issues; the mechanical measurement method is less efficient. The ultrasonic method has the advantages of non-destructive, high measurement accuracy and safety. It is more suitable for the application scenario of the tail flue of the power plant, but the optimized design and application for the specific environment of the tail flue of the power plant still need to be further studied. Traditional ultrasonic thickness measuring devices often have the following problems in the thickness measurement inspection of the tail flue:

[0004] 1. It is difficult for the plane of the traditional ultrasonic probe to completely fit the curved surface of the pipe. During the thickness measurement, the probe surface is often in point contact with the pipe, which causes the thickness measurement data to drift, affects the measurement accuracy, and reduces the inspection efficiency. At the same time, the probe rubs and collides with the pipe surface for a long time, which is easy to cause damage;

[0005] 2. The tail flue pipe has multiple layers from top to bottom, and the intervals between the pipes are narrow, so the thickness measurement space is extremely limited. During inspection, the staff needs to put their arms deep into the narrow gap. Due to the limitations of personnel characteristics and thickness measurement space, it is difficult to accurately locate the ideal thickness measurement position, and it is difficult to effectively measure the pipes close to the lower layer. On the other hand, it also causes problems such as low inspection efficiency and easy injury to personnel. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art and provide a new technical solution for an ultrasonic thickness measurement auxiliary device for a tail flue of a power station boiler.

[0007] According to one aspect of the present invention, there is provided an ultrasonic thickness measurement auxiliary device for a tail flue of a power plant boiler, comprising:

[0008] A sleeve unit and a compression spring, wherein the sleeve unit comprises a plurality of sleeves, and the plurality of sleeves can be detachably mounted together in sequence from bottom to top; a preset angle is formed between the upper end and the lower end of the sleeve located at the bottom; and the compression spring is arranged inside the sleeve located at the bottom and located at the angle;

[0009] A pressure shaft and an ultrasonic thickness measuring probe, wherein the pressure shaft is arranged inside the sleeve unit, and the top of the compression spring is connected to the pressure shaft, and the bottom is connected to the ultrasonic thickness measuring probe; the top of the pressure shaft is higher than the top of the sleeve located at the top;

[0010] An arc-shaped elastic sheet, wherein the end of the ultrasonic thickness measuring probe away from the compression spring fixes the arc-shaped elastic sheet, and the connection point between the arc-shaped elastic sheet and the ultrasonic thickness measuring probe is located at the center of the convex surface of the arc-shaped elastic sheet; wherein the radius of the arc-shaped elastic sheet is smaller than the radius of the pipeline to be measured;

[0011] When the sleeve unit is extended to the vicinity of the pipe to be tested, the pressure shaft is used to apply pressure to the ultrasonic thickness measuring probe through the compression spring, and the ultrasonic thickness measuring probe approaches the pipe to be tested and drives the arc-shaped elastic sheet to deform and adhere to the outer surface of the pipe to be tested.

[0012] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further includes an ultrasonic thickness gauge body and a data transmission line;

[0013] The ultrasonic thickness gauge body is connected to the ultrasonic thickness measuring probe via the data transmission line.

[0014] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further comprises a bakelite pad, and the ultrasonic thickness measurement probe is connected to the compression spring via the bakelite pad.

[0015] Optionally, a notch is provided on a side of the bakelite pad close to the ultrasonic thickness measuring probe, and the notch is used to lead out the data transmission line.

[0016] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further includes a data line buckle;

[0017] A plurality of data cable buckles are arranged along the height direction of the outer side wall of the sleeve unit;

[0018] The data transmission line located outside the sleeve unit is fixed to the sleeve unit through a plurality of data line buckles.

[0019] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further includes a connecting buckle;

[0020] Two adjacent sleeves are fixed together by the connecting buckle.

[0021] Optionally, a wire lead-out hole is provided at a position of the sleeve unit corresponding to the notch.

[0022] Optionally, the arc-shaped elastic sheet is welded to the ultrasonic thickness measuring probe.

[0023] Optionally, the preset angle is 90°-135°.

[0024] Optionally, the arc-shaped elastic sheet is made of spring steel.

[0025] A technical effect of the present invention is:

[0026] In the embodiment of the present application, the ultrasonic thickness measurement auxiliary device for the tail flue of the power plant boiler can be detachably installed together from bottom to top through multiple sleeves, which solves the problems of limited thickness measurement range, easy injury to personnel, low work efficiency, high work intensity, etc. in the traditional thickness measurement process, effectively extends the inspection range of the tail flue of the power plant, improves the inspection efficiency, and reduces the probability of pipeline failure caused by thinning to a certain extent.

[0027] At the same time, the arc-shaped elastic sheet can be deformed and attached to the outer surface of the pipe to be measured under the drive of the ultrasonic thickness gauge probe. On the one hand, it effectively protects the ultrasonic thickness gauge probe. On the other hand, by applying external force, the arc-shaped elastic sheet is gradually and fully fitted to the pipe to be measured, which improves the data drift problem caused by insufficient contact of traditional planar probes in curved surface structures and effectively improves the accuracy of thickness measurement.

[0028] In addition, the length of the casing unit of the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler is adjustable, and the device is easy to carry and small in size. The device can effectively extend into the narrow gap between flues for thickness measurement, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of an ultrasonic thickness measurement auxiliary device for a tail flue of a power station boiler according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic structural diagram of a bakelite pad of an ultrasonic thickness measurement auxiliary device for a tail flue of a power station boiler according to an embodiment of the present invention;

[0031] Figure 3 This is a reference diagram of the use status of an ultrasonic thickness measurement auxiliary device for a tail flue of a power plant boiler according to an embodiment of the present invention.

[0032] 100. Ultrasonic thickness measurement auxiliary device; 1. Ultrasonic thickness gauge body; 2. Data transmission line; 3. Pressure head; 4. Connecting buckle; 5. Transmission line buckle; 6. Casing; 7. Pressure shaft; 8. Compression spring; 9. Bakelite pad; 91. Notch; 10. Ultrasonic thickness measurement probe; 11. Arc-shaped elastic sheet; 12. Pipeline to be measured. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0034] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0035] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] According to one aspect of the present invention, an ultrasonic thickness measurement auxiliary device for a tail flue of a power station boiler is provided, which can be applied to flue anti-wear and explosion-proof inspections. It can effectively reach the thickness measurement position, expand the thickness measurement range, achieve full contact between the probe and the pipeline, improve the stability of the thickness measurement data, increase the service life of the probe, and reduce the risk of personal injury.

[0039] See also Figures 1 to 3 The ultrasonic thickness measurement auxiliary device 100 for the tail flue of a power plant boiler comprises:

[0040] A sleeve 6 unit and a compression spring 8, wherein the sleeve 6 unit comprises a plurality of sleeves 6, and the plurality of sleeves 6 can be detachably mounted together in sequence from bottom to top; a preset angle is formed between the upper end and the lower end of the sleeve 6 located at the bottom; and the compression spring 8 is arranged inside the sleeve 6 located at the bottom and located at the angle;

[0041] A pressure shaft 7 and an ultrasonic thickness measuring probe 10, wherein the pressure shaft 7 is arranged inside the sleeve 6 unit, and the top of the compression spring 8 is connected to the pressure shaft 7, and the bottom is connected to the ultrasonic thickness measuring probe 10; the top of the pressure shaft 7 is higher than the top of the sleeve 6 located at the top;

[0042] An arc-shaped elastic sheet 11, wherein the end of the ultrasonic thickness measuring probe 10 away from the compression spring 8 fixes the arc-shaped elastic sheet 11, and the connection point between the arc-shaped elastic sheet 11 and the ultrasonic thickness measuring probe 10 is located at the convex center of the arc-shaped elastic sheet 11; wherein the radius of the arc-shaped elastic sheet 11 is smaller than the radius of the pipe 12 to be measured;

[0043] When the sleeve 6 unit is extended to the vicinity of the pipe to be measured 12, the pressure shaft 7 is used to apply pressure to the ultrasonic thickness measuring probe 10 through the compression spring 8, and the ultrasonic thickness measuring probe 10 approaches the pipe to be measured 12 and drives the arc-shaped elastic sheet 11 to deform and adhere to the outer surface of the pipe to be measured 12.

[0044] In the embodiment of the present application, the ultrasonic thickness measurement auxiliary device for the tail flue of the power plant boiler can be detachably installed together from bottom to top in sequence through multiple sleeves 6, which solves the problems of limited thickness measurement range, easy injury to personnel, low work efficiency, high work intensity, etc. in the traditional thickness measurement process, effectively extends the inspection range of the tail flue of the power plant, improves the inspection efficiency, and reduces the probability of pipeline failure caused by thinning to a certain extent.

[0045] At the same time, the arc-shaped elastic sheet 11 can be deformed and attached to the outer surface of the pipe 12 to be measured under the drive of the ultrasonic thickness gauge probe 10. On the one hand, it effectively protects the ultrasonic thickness gauge probe 10. On the other hand, by applying external force, the arc-shaped elastic sheet 11 is gradually and fully fitted with the pipe 12 to be measured, thereby improving the data drift problem caused by insufficient contact of the traditional plane probe in the curved surface structure and effectively improving the thickness measurement accuracy.

[0046] In addition, the length of the sleeve 6 unit of the ultrasonic thickness measurement auxiliary device for the tail flue of the power station boiler is adjustable, easy to carry, small in size, can effectively extend into the narrow gap between the flues for thickness measurement, and is easy to operate.

[0047] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further includes an ultrasonic thickness gauge body 1 and a data transmission line 2;

[0048] The ultrasonic thickness gauge body 1 is connected to the ultrasonic thickness measuring probe 10 via the data transmission line 2 .

[0049] In the above embodiment, it is helpful to return the ultrasonic thickness measurement data measured by the ultrasonic thickness measurement probe 10 to the ultrasonic thickness gauge body 1 through the data transmission line 2, so that the staff can read the wall thickness value of the area to be measured.

[0050] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further comprises a bakelite pad 9, and the ultrasonic thickness measurement probe 10 is connected to the compression spring 8 via the bakelite pad 9. This makes the connection mode between the ultrasonic thickness measurement probe 10 and the compression spring 8 more reasonable, which helps to ensure the accuracy and stability of the measurement result of the ultrasonic thickness measurement probe 10.

[0051] Optionally, a notch 91 is provided on one side of the bakelite pad 9 close to the ultrasonic thickness measuring probe 10, and the notch 91 is used to lead out the data transmission line 2. This helps to ensure the stability of the connection between the ultrasonic thickness measuring probe 10 and the data transmission line 2.

[0052] In the above embodiment, the notch 91 of the bakelite pad 9 helps to conveniently lead out the data transmission line 2 , thereby ensuring the stability of the connection between the data transmission line 2 and the ultrasonic thickness measuring probe 10 .

[0053] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further includes a data line buckle;

[0054] A plurality of data line buckles are arranged along the height direction of the outer side wall of the sleeve 6 unit;

[0055] The data transmission line 2 located outside the sleeve 6 unit is fixed to the sleeve 6 unit through a plurality of data line buckles.

[0056] In the above embodiment, the data transmission line 2 can be well fixed by the data line buckle.

[0057] Optionally, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler further includes a connecting buckle 4;

[0058] Two adjacent sleeves 6 are fixed together by the connecting buckle 4 .

[0059] In the above embodiment, the connection relationship between the sleeves 6 is relatively simple and easy to operate.

[0060] Optionally, a wire lead-out hole is provided at a position of the sleeve 6 unit corresponding to the notch 91. This helps the data transmission line 2 to smoothly pass through the sleeve 6 unit through the wire lead-out hole.

[0061] Optionally, the arc-shaped elastic sheet 11 is welded to the ultrasonic thickness measuring probe 10. This makes the connection between the arc-shaped elastic sheet 11 and the ultrasonic thickness measuring probe 10 more firm.

[0062] Optionally, the preset angle is 90°-135°. This helps the ultrasonic thickness measurement auxiliary device 100 to smoothly extend into the gap between the pipes to accurately measure the wall thickness of the pipe 12 to be measured.

[0063] Optionally, the arc-shaped elastic sheet 11 is made of spring steel, which helps to make the arc-shaped elastic sheet 11 fit the outer wall of the pipe 12 to be measured under the action of pressure, and helps to ensure the accuracy of the measurement result.

[0064] Exemplarily, a pressure head 3 is provided at the top of the pressure shaft 7, and pressure is applied to the pressure shaft 7 through the pressure head 3. Moreover, the cross-sectional area of ​​the pressure head 3 is larger than the cross-sectional area of ​​the sleeve 6 to prevent the pressure head 3 from falling into the interior of the sleeve 6.

[0065] In a specific implementation, the on-site implementation process of the ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler is as follows:

[0066] In step 1, a worker uses an electric soldering iron to solder, with the aid of solder paste, an arc-shaped elastic sheet 11 (eg, an arc-shaped high-elastic steel sheet) and an ultrasonic thickness measuring probe 10 .

[0067] Step 2: The staff arrives at the designated location, turns on the ultrasonic thickness gauge body 1 and connects the data transmission line 2 to perform instrument calibration.

[0068] Step 3, determine the thickness measurement height by visual inspection and adjust the casing 6 unit to the appropriate height.

[0069] Step 4, the ultrasonic thickness measuring probe 10 is placed inside the casing 6 located at the bottom; the data transmission line 2 is led out from the wire lead-out hole reserved in the casing 6 through the notch 91 of the bakelite block.

[0070] Step 5, tighten each connection buckle 4 to fix the length of the sleeve 6 unit, and fix the derived data transmission line 2 on the sleeve 6 unit through the transmission line buckle 5.

[0071] Step 6: Extend the ultrasonic thickness measurement auxiliary device 100 through the gap in the pipeline into the area to be measured.

[0072] Step 7, by applying downward pressure at the pressure head 3, the pressure shaft 7 is driven to move downward, and the force is further transmitted to the arc-shaped elastic sheet 11 through the compression spring 8. Since the radius of the pipeline 12 to be tested is greater than the radius of the arc-shaped elastic sheet 11, the arc-shaped elastic sheet 11 always ensures that both ends are in contact with the pipeline 12 to be tested first. As the pressure continues to be applied, the arc-shaped elastic sheet 11 is deformed, and the two ends of the arc-shaped elastic sheet 11 will gradually move outward, and the curvature will increase until it is finally fully fitted with the pipe wall test area of ​​the pipeline 12 to be tested under the action of pressure.

[0073] Step 8: The ultrasonic thickness measurement data is returned to the ultrasonic thickness gauge body 1 through the data transmission line 2 to read the wall thickness value of the area to be measured.

[0074] In the above-mentioned implementation manner, the ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler can realize a thickness measurement process that extends the inspection range, improves thickness measurement stability, and reduces the risk of personal injury.

[0075] Therefore, the ultrasonic thickness measurement auxiliary device for the tail flue of the power plant boiler has a simple structure, easy operation, is independent of the operator's experience and skill level, improves measurement stability and work efficiency, and reduces safety hazards for workers. It has broad application prospects in the context of anti-wear and explosion-proof inspections in power plants.

[0076] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler, characterized in that: include: A sleeve unit and a compression spring, wherein the sleeve unit comprises a plurality of sleeves, and the plurality of sleeves can be detachably mounted together in sequence from bottom to top; a preset angle is formed between the upper end and the lower end of the sleeve located at the bottom; and the compression spring is arranged inside the sleeve located at the bottom and located at the angle; A pressure shaft and an ultrasonic thickness measuring probe, wherein the pressure shaft is arranged inside the sleeve unit, and the top of the compression spring is connected to the pressure shaft, and the bottom is connected to the ultrasonic thickness measuring probe; the top of the pressure shaft is higher than the top of the sleeve located at the top; An arc-shaped elastic sheet, wherein the end of the ultrasonic thickness measuring probe away from the compression spring fixes the arc-shaped elastic sheet, and the connection point between the arc-shaped elastic sheet and the ultrasonic thickness measuring probe is located at the center of the convex surface of the arc-shaped elastic sheet; wherein the radius of the arc-shaped elastic sheet is smaller than the radius of the pipeline to be measured; When the sleeve unit is extended to the vicinity of the pipe to be tested, the pressure shaft is used to apply pressure to the ultrasonic thickness measuring probe through the compression spring, and the ultrasonic thickness measuring probe approaches the pipe to be tested and drives the arc-shaped elastic sheet to deform and adhere to the outer surface of the pipe to be tested.

2. The ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler according to claim 1 is characterized in that: It also includes an ultrasonic thickness gauge body and a data transmission line; The ultrasonic thickness gauge body is connected to the ultrasonic thickness measuring probe via the data transmission line.

3. The ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler according to claim 2 is characterized in that: It also includes a bakelite pad, and the ultrasonic thickness measuring probe is connected to the compression spring via the bakelite pad.

4. The ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler according to claim 3 is characterized in that: A notch is provided on one side of the bakelite pad close to the ultrasonic thickness measuring probe, and the notch is used to lead out the data transmission line.

5. The ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler according to claim 4 is characterized in that: It also includes a data cable clip; A plurality of data line buckles are arranged along the height direction of the outer side wall of the sleeve unit; The data transmission line located outside the sleeve unit is fixed to the sleeve unit through a plurality of data line buckles.

6. The ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler according to claim 1 is characterized in that: Also includes a connection buckle; Two adjacent sleeves are fixed together by the connecting buckle.

7. The ultrasonic thickness measurement auxiliary device for the tail flue of a power plant boiler according to claim 4 is characterized in that: A wire lead-out hole is provided at a position of the sleeve unit corresponding to the notch.

8. The ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler according to claim 1 is characterized in that: The arc-shaped elastic sheet is welded to the ultrasonic thickness measuring probe.

9. The ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler according to claim 1, characterized in that: The preset angle is 90°-135°.

10. The ultrasonic thickness measurement auxiliary device for the tail flue of a power station boiler according to claim 1, characterized in that: The material of the arc-shaped elastic sheet is spring steel.

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