Welding seam detection device for heating surface pipe special-shaped supporting block

Abstract

The utility model provides a welding seam detection device for a special-shaped supporting block of a heating surface pipe, which relates to the technical field of welding seam detection and comprises a telescopic mechanism, a control handle, a camera, an electromagnetic detection coil, a spring and a collecting device. Meanwhile, a camera device is additionally arranged at the front end of the detection device and is used for confirming the detection position in real time; the detection device adopts an electromagnetic detection coil as a detection probe, so that a coupling procedure is avoided; the detection coil is subjected to elastic pressing type design by utilizing the spring, so that accurate fitting of the detection part is realized, and the defects that the detection of the defect of the heating surface special-shaped supporting block welding seam is inaccurate and the nondestructive detection cannot be performed on some parts in the prior art are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of weld detection, in particular to a weld detection device for a special-shaped support block of a heating surface pipe. Background Art

[0002] As thermal power units continue to develop towards higher parameters, the service environment of boiler heating surface tubes has become increasingly complex and harsh. The explosion and leakage of the "four boiler tubes" seriously threaten the safe and stable operation of power generation companies. In recent years, due to the frequent peak regulation of thermal power and frequent load increases and decreases, it is easy to cause excessive temperature gradients between adjacent tubes, generate huge thermal stress at the stress concentration point, and eventually the "four boiler tubes" crack and fail.

[0003] There are some problems in the existing technology for defect elimination at locations prone to cracking. For example, there is a lack of defect elimination assessment methods for locations prone to cracking in pipelines, and on-site inspection personnel cannot accurately determine the key areas of non-destructive testing. Existing conventional non-destructive testing methods, such as radiographic testing, cannot achieve imaging of defects at the M-shaped support block and the pipe corner weld, and are not suitable for the detection of such defects. Traditional ultrasonic methods are also not suitable for the detection of such defects due to the special structure of the M-shaped support block and the pipe corner weld, where an ultrasonic detection probe cannot be placed. Detection methods such as magnetic powder and penetration testing can only detect surface and near-surface defects, but cannot detect internal defects at the location, and internal defects often directly lead to leakage accidents.

[0004] The electromagnetic thickness measurement method is used to measure the defective parts, which can accurately determine the defect situation. The electromagnetic thickness measurement detection principle is: when the electromagnetic field passes through the material to be measured, the induced electromagnetic induction signal is proportional to the thickness of the material; at the same time, the propagation speed of the ultrasonic wave inside the material is related to the density and elastic modulus of the material, and these parameters are related to the thickness of the material. Therefore, the utility model can determine the thickness of the material by measuring the electromagnetic induction signal and the ultrasonic signal, determine whether there is a crack defect by measuring the thickness, and can be used for rapid detection of defects at the corner weld of the M-type support block and the pipe. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the prior art in inaccurate detection of weld defects of special-shaped support blocks of heated surfaces and the inability to perform non-destructive detection on certain parts, thereby providing a device for detecting weld defects of special-shaped support blocks of heated surface tubes.

[0006] A device for detecting weld seams of special-shaped support blocks of heated surface tubes, comprising: a control handle, a telescopic mechanism, a collecting device and a detecting mechanism, wherein the telescopic mechanism comprises a first telescopic mechanism and a second telescopic mechanism, the control handle, the first telescopic mechanism, the collecting device, the second telescopic mechanism and the detecting mechanism are connected in sequence transversely, the collecting device is provided with collecting mechanisms for winding power harnesses and data harnesses in pairs inside the collecting device, and a driving device for driving the collecting mechanisms to wind the power harnesses and the data harnesses is provided on the collecting mechanism, a camera, an electromagnetic detection coil and an elastic unit are provided on the detecting mechanism, the electromagnetic detection coil is provided above the elastic unit, and the power harnesses and the data harnesses extend from the electromagnetic detection coil in the detecting mechanism to the control handle.

[0007] Furthermore, the collecting device also includes a fixing bolt, the upper half of the fixing bolt screw rod has a smooth surface, and the lower half of the fixing bolt screw rod has a threaded surface.

[0008] Furthermore, the collecting mechanism is an annular structure, and the upper and lower surfaces of the collecting mechanism are provided with collecting mechanism wire slot baffles in pairs, the collecting mechanism is cooperatively connected with the upper half of the fixing bolt, and the lower half of the fixing bolt is threadedly connected with the shell of the collecting device.

[0009] Furthermore, the driving device is a rocker, which extends from the collecting mechanism to the outside of the collecting device shell, and the collecting device shell is provided with an annular opening corresponding to the rotation trajectory of the rocker.

[0010] Furthermore, a detection switch button, a power button, an emergency stop button and a display screen are arranged in sequence on the control handle in a transverse direction.

[0011] Furthermore, the elastic unit is a spring.

[0012] Furthermore, the first telescopic mechanism is composed of an inner rod and an outer rod, the inner rod is movably installed inside the outer rod, and the diameter of the inner rod is smaller than the diameter of the outer rod.

[0013] Furthermore, the first telescopic mechanism also includes a sealing member, which is mounted on one end of the outer rod and is cooperatively connected with the inner rod.

[0014] Furthermore, the first telescopic mechanism and the second telescopic mechanism have the same shape and size parameters.

[0015] Furthermore, the elastic unit also includes a column, a square cavity is provided on the detection mechanism, the column is installed above the square cavity, and the spring is wound around the column.

[0016] The technical solution of the utility model has the following advantages:

[0017] 1. The utility model provides a weld detection device for special-shaped support blocks of heated surface pipes, which adopts a telescopic mechanism to realize long-distance detection, and at the same time, a camera device is installed at the front end of the detection device to realize real-time confirmation of the detection position; the detection device adopts an electromagnetic detection coil as a detection probe, avoiding the need for coupling procedures; the detection coil is designed with a spring pressure type to achieve accurate fitting of the detection part.

[0018] 2. The technical solution provided by the utility model has the advantages of fast, efficient and accurate detection while detecting special-shaped support blocks, and the detection device has a simple structure, is easy to process, has low cost and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the control handle of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the first telescopic mechanism and the second telescopic mechanism of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the detection mechanism of the utility model;

[0024] Figure 5 It is a top view of the connection between the collecting mechanism and the fixing bolts of the utility model;

[0025] Figure 6 This is a schematic diagram of the connection structure of the collection mechanism, rocker and fixing bolts of the utility model;

[0026] Figure 7 This is a schematic diagram of the wire slot baffle structure of the collection mechanism of the utility model;

[0027] Figure 8 This is a schematic diagram of the fixing bolt structure of the utility model.

[0028] Description of reference numerals:

[0029] 1-first telescopic mechanism; 101-second telescopic mechanism; 2-control handle; 201-display screen; 202-detection switch button; 203-power on button; 204-emergency stop button; 3-detection mechanism; 301-camera; 302-electromagnetic detection coil; 303-spring; 4-collection device; 401-collection mechanism; 402-collection mechanism wire slot baffle; 403-rocker; 404-fixing bolt. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6The device shown is a weld detection device for a special-shaped support block of a heated surface tube, comprising: a control handle 2, a telescopic mechanism, a collecting device 4 and a detection mechanism 3, wherein the telescopic mechanism comprises a first telescopic mechanism 1 and a second telescopic mechanism 101, the control handle 2, the first telescopic mechanism 1, the collecting device 4, the second telescopic mechanism 101 and the detection mechanism 3 are connected in sequence laterally, and a collecting mechanism 401 for winding a power harness and a data harness is installed in pairs inside the collecting device 4, and a driving device for driving the collecting mechanism 401 to wind the power harness and the data harness is installed on the collecting mechanism 401, a camera 301, an electromagnetic detection coil 302 and an elastic unit are installed on the detection mechanism 3, the electromagnetic detection coil 302 is installed above the elastic unit, and the power harness and the data harness extend from the electromagnetic detection coil 302 in the detection mechanism 3 to the control handle 2.

[0035] The above-mentioned device for detecting weld seams of special-shaped support blocks of heated surface tubes adopts a first telescopic mechanism 1 and a second telescopic mechanism 101 to realize long-distance detection; at the same time, a camera 301 is installed at the front end of the detection device to realize real-time confirmation of the detected position; the collecting mechanisms 401 installed in pairs are convenient for winding power harnesses and data harnesses, and the electromagnetic detection coil 302 is used as a probe in the detection mechanism 3, avoiding the need for a coupling process; the electromagnetic detection coil 302 is designed with a spring-pressed design using an elastic unit, which realizes the precise fit of the electromagnetic detection coil 302 in the detection device with the detected part, thereby increasing the accuracy of the detection.

[0036] like Figure 1 and Figure 3 As shown, in this embodiment, the first telescopic mechanism 1 is composed of an inner rod and an outer rod, the inner rod is movably installed inside the outer rod, and the diameter of the inner rod is smaller than the diameter of the outer rod. The first telescopic mechanism 1 also includes a seal, which is installed on one end of the outer rod that is connected to the inner rod to prevent dust, moisture and impurities from entering the interior and affecting use. The shape and size parameters of the first telescopic mechanism 1 and the second telescopic mechanism 101 are the same.

[0037] like Figure 1 , Figure 5 , Figure 6 and Figure 8 As shown, in this embodiment, the collecting device 4 also includes a fixing bolt 404, and the upper half of the screw of the fixing bolt 404 is a smooth surface. The smooth surface is used to reduce the friction at the contact point between the collecting mechanism 401 and the fixing bolt 404 when the collecting mechanism 401 is winding the power harness and the data harness, and to limit the position of the collecting mechanism 401. The lower half of the screw of the fixing bolt 404 is provided with a thread, so that the fixing bolt 404 is threadedly connected to the outer shell of the collecting device 4, thereby fixing the collecting mechanism 401 inside the shell of the collecting device 4.

[0038] like Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in this embodiment, the collecting mechanism 401 is a ring structure, and the upper surface and lower surface of the collecting mechanism 401 are provided with collecting mechanism wire slot baffles 402 in pairs, and the collecting mechanism wire slot baffles 402 are used to make the collecting mechanism 401 more convenient when winding the power harness and the data harness, so that the harness can be better collected on the collecting mechanism 401, and the collecting mechanism 401 is connected with the upper half of the fixing bolt 404, and the lower half of the fixing bolt 404 is threadedly connected with the shell of the collecting device 4.

[0039] like Figure 1 , Figure 5 and Figure 6 As shown, in this embodiment, the driving device is a rocker arm 403, which extends from the collecting mechanism 401 to the outside of the shell of the collecting device 4. The rocker arm 403 is fixedly connected to the collecting mechanism 401. The rocker arm 403 is convenient for driving the collecting mechanism 401 to wind the power harness and the data harness, and an annular opening corresponding to the rotation trajectory of the rocker arm 403 is provided on the shell of the collecting device 4 as a rotation track of the rocker arm 403.

[0040] like Figure 1 and Figure 2 As shown, in this embodiment, a detection switch button 202, a power button 203, an emergency stop button 204 and a display screen 201 are arranged horizontally on the control handle 2 in sequence. The detection switch button 202 is used to turn on and off the detection function of the detection device, the power button 203 is used to realize the power on and off functions of the detection device, the emergency stop button 204 is used for the emergency stop control function when an unexpected situation occurs in the device, and the display screen 201 is used for real-time observation to confirm the detected position and confirm the detection data to determine whether there are defects such as cracks.

[0041] like Figure 1 and Figure 4 As shown, in this embodiment, the elastic unit is a spring 303, and a square cavity is installed in the middle part of the detection mechanism 3. The elastic unit also includes a column, which is installed above the square cavity. The column can move up and down inside and outside the cavity. The electromagnetic detection coil 302 is fixedly installed on the top of the column as a detection probe, and the spring 303 is wound on the column. When the electromagnetic detection coil 302 contacts the detected part, the elastic pressure design composed of the spring 303 and the retractable column can better fit the detected part to achieve accurate measurement.

[0042] like Figure 1 to Figure 8As shown, in this embodiment, the working process of the detection device is as follows: first, during the detection, the detection device is held on site, and the power button 203 is clicked to turn on the detection device; during the detection process, if the detection distance does not meet the detection requirements, the first telescopic mechanism 1 and the second telescopic mechanism 101 can be manually adjusted to achieve access to the detected position, and the power harness and the data harness can also be released at the same time. Through the real-time camera 301, the display screen 201 is observed to confirm the detected position, and the electromagnetic detection coil 302 is tightly fitted to the detected position through the spring 303, and then the detection switch button 202 is clicked to start the detection of the detected position; the display screen 201 is observed to confirm the detection data and determine whether there are defects such as cracks at the detected position. After the detection is completed, the rocker 403 is used to drive the collection mechanism 401 to complete the winding of the power harness and the data harness, and the detection switch button 202 is clicked to turn off the detection function, and the power button 203 is clicked to shut down the detection device.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A device for detecting weld seams of special-shaped support blocks of heating surface tubes, comprising: A control handle (2), a telescopic mechanism, a collecting device (4) and a detection mechanism (3), characterized in that the telescopic mechanism comprises a first telescopic mechanism (1) and a second telescopic mechanism (101), the control handle (2), the first telescopic mechanism (1), the collecting device (4), the second telescopic mechanism (101) and the detection mechanism (3) are connected in sequence in a transverse manner, the collecting device (4) is internally provided with collecting mechanisms (401) for winding power harnesses and data harnesses in pairs, and the collecting mechanisms (401) are provided with a driving device for driving the collecting mechanisms (401) to wind the power harnesses and the data harnesses, the detection mechanism (3) is provided with a camera (301), an electromagnetic detection coil (302) and an elastic unit, the electromagnetic detection coil (302) is provided above the elastic unit, and the power harnesses and the data harnesses extend from the electromagnetic detection coil (302) in the detection mechanism (3) to the control handle (2).

2. A weld detection device for special-shaped support blocks of heated surface tubes according to claim 1, characterized in that: The collecting device (4) further comprises a fixing bolt (404), wherein the upper half of the screw rod of the fixing bolt (404) has a smooth surface, and the lower half of the screw rod of the fixing bolt (404) is provided with a thread.

3. A device for detecting weld seams of special-shaped support blocks of heating surface tubes according to claim 2, characterized in that: The collecting mechanism (401) is an annular structure, and the upper and lower surfaces of the collecting mechanism (401) are provided with collecting mechanism wire slot baffles (402) in pairs. The collecting mechanism (401) is cooperatively connected to the upper half of the fixing bolt (404), and the lower half of the fixing bolt (404) is threadedly connected to the housing of the collecting device (4).

4. A weld detection device for special-shaped support blocks of heated surface tubes according to claim 3, characterized in that: The driving device is a rocker (403), the rocker (403) extending from the collecting mechanism (401) to the outside of the collecting device (4) housing, and the collecting device (4) housing is provided with an annular opening corresponding to the rotation trajectory of the rocker (403).

5. The device for detecting weld seams of special-shaped support blocks of heating surface tubes according to claim 1, characterized in that: The control handle (2) is provided with a detection switch button (202), a power-on button (203), an emergency stop button (204) and a display screen (201) in sequence in a transverse direction.

6. The device for detecting weld seams of special-shaped support blocks of heating surface tubes according to claim 1, characterized in that: The elastic unit is a spring (303).

7. The device for detecting weld seams of special-shaped support blocks of heating surface tubes according to claim 1, characterized in that: The first telescopic mechanism (1) consists of an inner rod and an outer rod, the inner rod is movably mounted inside the outer rod, and the diameter of the inner rod is smaller than the diameter of the outer rod.

8. A device for detecting weld seams of special-shaped support blocks of heating surface tubes according to claim 7, characterized in that: The first telescopic mechanism (1) further comprises a sealing member, which is mounted on one end of the outer rod and is cooperatively connected to the inner rod.

9. A weld detection device for special-shaped support blocks of heating surface tubes according to claim 8, characterized in that: The first telescopic mechanism (1) and the second telescopic mechanism (101) have the same shape and size parameters.

10. The device for detecting weld seams of special-shaped support blocks of heating surface tubes according to claim 6, characterized in that: The elastic unit also includes a column, a square cavity is provided on the detection mechanism (3), the column is installed above the square cavity, and the spring (303) is wound around the column.

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