Confined Space Weld Measurement Device and Measurement Method

Abstract

This invention discloses a confined space weld measurement device and method. The measuring device includes a polygonal ruler plate with a first working surface, a fourth working surface, a second working surface, a third working surface, and other side surfaces connecting the first and third working surfaces along its circumference. The first and second working surfaces are perpendicular to each other, and the third and fourth working surfaces are perpendicular to each other. Each side of the ruler plate has a groove, and each groove contains a sliding ruler. Graduation lines are provided on the sides of both grooves, and the sliding ruler has markings or structures indicating the scale readings. This measuring device and method are used to measure the thickness of fillet welds in confined spaces. Its structure is novel and rationally designed. In use, any two perpendicular working surfaces are placed against the two side walls of a corner. By moving the sliding ruler and observing the scale readings, the weld thickness can be quickly calculated. The measurement is accurate and easy to operate.

Description

Technical Field

[0001] This invention relates to the fields of welding technology and measurement technology, specifically to a confined space weld measurement device and its measurement method. Background Technology

[0002] The Hualong One nuclear island employs a double-layer containment design. The steel liner structure of the containment serves as a barrier to prevent radioactive material leakage, requiring high sealing and leak-proof performance. To meet these requirements, reinforced weld legs are used at the connection between the steel liner cylinder and the angle steel. These reinforced weld legs provide anchorage and support for the steel liner, playing a crucial role in its nuclear leak-proof function. Therefore, there are clear dimensional acceptance standards for the weld throat dimensions at this location. However, due to the confined working space after welding the steel liner cylinder to the angle steel, it is impossible to establish a working surface and measurement benchmark using current conventional measuring tools. If the weld dimensions are not controlled because existing measuring tools are unsuitable for measuring weld dimensions in such a confined space, it is difficult to avoid stress concentration caused by insufficient weld thickness or excessive weld size, leading to the steel liner cylinder detaching from the angle steel. Loss of anchorage and support would then pose a risk of nuclear leakage. Summary of the Invention

[0003] The technical objective of this invention is to provide a confined space weld measurement device and method to address the shortcomings of existing technologies.

[0004] To achieve the above objectives, the present invention has designed the following technical solution: A confined space weld measurement device, comprising a ruler and a sliding ruler, characterized in that: The ruler plate has a polygonal surface, and the side of the ruler plate is provided with a first working surface, a fourth working surface, a second working surface, a third working surface and other side surfaces connecting the first working surface and the third working surface in sequence along the circumference. The other side surfaces include more than one side surface. The first working surface and the second working surface are perpendicular to each other. The third working surface and the fourth working surface are perpendicular to each other; The ruler plate has a straight groove on each of its front and back sides. The front groove extends perpendicularly to the fourth working surface and one end of the front groove is open on the fourth working surface. The back groove extends perpendicularly to the second working surface and one end of the back groove is open on the second working surface. Each groove is equipped with a sliding ruler, which is slidably connected to the corresponding groove. Both grooves have scale lines on their sides, and the sliding ruler has a mark or structure to indicate the scale reading. The length of the slide ruler is not greater than the length of the slide groove to which it is connected. In the idle state, both ends of the slide ruler are stored in the slide groove. When working, the slide ruler is pushed by external force, and the end of it that is close to the second working surface or the fourth working surface extends outward from the slide groove to contact the surface of the weld to be tested.

[0005] Based on the above solutions, further improvements or preferred solutions include: Furthermore, the end of the slide ruler extending out of the slide groove is a tapered structure, and the tip of the tapered structure is used to contact the surface of the weld to be tested.

[0006] Furthermore, the distance from the second working surface to the other side of the ruler and the farthest point therefrom is defined as h1, and the distance from the fourth working surface to the other side of the ruler and the farthest point therefrom is defined as h2, with h1 ≠ h2.

[0007] Furthermore, the included angles between the first working surface and the fourth working surface, the included angles between the fourth working surface and the second working surface, and the included angles between the second working surface and the third working surface are all equal; one end of one of the slide grooves is located at the middle position of the second working surface, and one end of the other slide groove is located at the middle position of the fourth working surface.

[0008] Furthermore, the scale line includes a 0-position reference line. When the slider extends outward to connect with the planes where the two mutually perpendicular working surfaces are located, the markings or structures indicating the scale stop at the 0-position reference line.

[0009] A method for measuring welds in confined spaces, implemented using the confined space weld measuring device described above, is characterized by comprising the following steps: The measurement is performed from the front or back of the measuring device depending on the size of the confined space. The confined space is a groove-shaped structure with one side opening, and is provided with a top plate, a bottom plate and a side plate. The top plate and the bottom plate are parallel to each other, and the side plate is set between the top plate and the bottom plate and is perpendicular to the top plate and the bottom plate. The weld is located at the connection between the side plate and the bottom plate. When using a measuring device to measure from the front, place the first working surface against the side plate and the second working surface against the bottom plate, so that the sliding ruler on the front points towards the weld. When using the measuring device to measure from the reverse side, place the third working surface against the side plate and the fourth working surface against the bottom plate, so that the sliding ruler on the reverse side points towards the weld. When the weld height is 0, the scale reading of the slider is taken as the reference scale. Push the slider pointing to the weld so that its end contacts the surface of the weld. Read the scale reading corresponding to the marking or structure of the indicator scale at this time, and calculate the difference between it and the reference scale to obtain the thickness of the weld.

[0010] The beneficial effects of this invention are: The measuring device and method of this invention are used to measure the thickness (or weld throat) of fillet welds in confined spaces. The device has a novel and reasonable structural design. When in use, any two mutually perpendicular working surfaces are placed against the two side walls of the welding corner. By moving the sliding ruler and observing the change in the scale reading, the weld thickness can be quickly calculated. The measurement is accurate and easy to operate, which can significantly improve work efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the front and back structures of the confined space weld measurement device of the present invention; Figure 2 This is a schematic diagram of the fillet weld throat dimensions in the confined space measured from the front (A) of this invention. Figure 3 This is a schematic diagram of the fillet weld throat dimensions in the confined space measured from the reverse side (B) in this invention. Figure 4 This is a schematic diagram of the large-size weld throat of the fillet weld measured from the reverse side (B) in this invention.

[0012] In the above diagram: 1-ruler plate, 1-1 first working surface, 1-2 second working surface, 1-3 third working surface, 1-4 fourth working surface, 2-1 sliding ruler, 2-2 sliding ruler, 3-1 scale line, 3-2 scale line, 4 steel lining wall panel, 5 angle steel. Implementation

[0013] To clarify the design scheme and working principle of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] The present invention relates to a confined space weld measurement device, which consists of a ruler plate 1, a sliding ruler, and graduation lines.

[0015] like Figure 1 In one embodiment shown, the ruler 1 is a planar plate with a non-regular polygonal octagonal surface, meaning the ruler 1 has eight sides. These eight sides are, in order of circumference, a first working surface 1-1, a fourth working surface 1-4, a second working surface 1-2, a third working surface 1-3, and four other sides connecting the first and third working surfaces 1-1 and 1-3. Furthermore, the surfaces containing the first and second working surfaces 1-1 are perpendicular to each other, and the surfaces containing the third and fourth working surfaces 1-3 are perpendicular to each other. Additionally, the included interior angles between the first and fourth working surfaces 1-1, between the fourth and second working surfaces 1-4, and between the second and third working surfaces 1-2 are all equal.

[0016] The ruler plate 1 has a straight groove on each of its front and back sides. The groove on the front side A extends perpendicularly to the fourth working surface 1-4, and the bottom opening of the groove on the front side A is located at the middle position of the fourth working surface 1-4. The groove on the back side B extends perpendicularly to the second working surface 1-2, and the bottom opening of the groove on the back side B is located on the second working surface 1-2.

[0017] Each groove contains a sliding ruler. Sliding ruler 2-1 on the front side (A) is slidably connected to the groove on the front side (A), and sliding ruler 2-2 on the back side (B) is slidably connected to the groove on the back side (B). Graduation lines are provided on the sides of both grooves, and both sliding rulers are also equipped with markings or structures indicating the scale readings.

[0018] The length of each sliding ruler is no greater than the length of the groove to which it is connected, allowing the sliding rulers to be retracted into the grooves when not in use. When measuring a weld, the sliding ruler is pushed by an external force, and the end of it closest to the second working surface 1-2 or the fourth working surface 1-4 extends outward from the groove to contact the surface of the weld to be measured. Since the corner structure size is smaller the closer to the weld, to ensure that the sliding ruler can smoothly contact the weld surface without being blocked by the sidewall, the end of the sliding ruler extending out of the groove is designed as a tapered structure, so that the tip of the tapered structure contacts the surface of the weld to be measured.

[0019] To enable direct reading of measurement results during the measurement process, a 0-position reference line is set for the scale. When the slider extends outward to meet the planes of the two mutually perpendicular working surfaces, or in other words, when the weld thickness is 0 and the slider moves to its limit position and touches the corner, the marking or structure of the indicating scale stops at the 0-position reference line. Therefore, when the slider contacts a weld with thickness, the current scale value is the measurement result.

[0020] The confined space is a channel-shaped structure with an opening on one side, comprising a top plate, a bottom plate, and a side plate. The top and bottom plates are parallel to each other, and the side plate is positioned between the top and bottom plates, perpendicularly connected to them. The weld is located at the connection between the side plate and the bottom plate. In the steel lining structure of a nuclear power plant containment vessel, the confined space is formed by the steel lining wall panel 4 and angle steel 5 welded to the steel lining wall panel 4, such as... Figure 2 , Figure 3 As shown. Currently, there are two sizes of angle steel structures for the containment steel lining of nuclear power plants: 50mm and 75mm. To make the measuring device applicable to confined spaces of multiple sizes, this embodiment adjusts the distances between the sides of the ruler 1. The distance from the second working surface 1-2 to the farthest point on the other side of the ruler 1 is defined as h1, and the distance from the fourth working surface 1-4 to the farthest point on the other side of the ruler 1 is defined as h2. The design ensures that h1 ≠ h2. Figure 2 , Figure 3As shown in the specific example, the height of the confined space that can be measured using the front side A is approximately 45mm-60mm, and the height of the confined space that can be measured using the back side B is approximately 60mm-75mm, which can satisfy the two types of angle steel structures mentioned above.

[0021] The specific implementation process of the measurement method using the confined space weld measurement device described above is as follows: First, depending on the height of the confined space, choose to use the front or back of the measuring device to perform the measurement; When measuring the front side using the measuring device, the ruler plate is held vertically and perpendicular to the base plate. The first working surface 1-1 is placed against the side plate, and the second working surface 1-2 is placed against the base plate, so that the sliding ruler 2-1 on the front side A points towards the weld. When using the measuring device to measure from the reverse side, the ruler plate is held vertically and perpendicular to the base plate. The third working surface 1-3 is placed against the side plate, and the fourth working surface 1-4 is placed against the base plate, so that the sliding ruler 2-2 on the reverse side B points towards the weld. Push the slider pointing towards the weld until its tip contacts the surface of the weld. Read the scale reading that the indicator mark or structure is aligned with at this time. The difference between this reading and the reference scale 0 is the thickness of the weld.

[0022] It should be noted that terms such as "upper," "lower," "left," "right," "front," "back," "positive," and "negative" used in this invention are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Furthermore, those skilled in the art will understand that the measuring device of this invention can also be used at right-angle welds without top plates to reduce limitations.

[0023] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A confined space weld measuring device, comprising a ruler (1) and a sliding ruler, characterized in that: The ruler plate (1) has a polygonal surface. The side of the ruler plate (1) is provided with a first working surface (1-1), a fourth working surface (1-4), a second working surface (1-2), a third working surface (1-3) and other side surfaces connecting the first working surface (1-1) and the third working surface (1-3) in sequence along the circumference. The other side surfaces include more than one side surface. The first working surface (1-1) and the second working surface (1-2) are perpendicular to each other; The third working surface (1-3) and the fourth working surface (1-4) are perpendicular to each other; The ruler plate (1) has a straight groove on each of its front and back sides. The extension direction of the front groove is perpendicular to the fourth working surface (1-4), and one end of the front groove is set on the fourth working surface (1-4). The extension direction of the back groove is perpendicular to the second working surface (1-2), and one end of the back groove is set on the second working surface (1-2). Each groove is equipped with a sliding ruler, which is slidably connected to the corresponding groove. Both grooves have scale lines on their sides, and the sliding ruler has a mark or structure to indicate the scale reading. The length of the slide ruler is not greater than the length of the slide groove to which it is connected. In the idle state, both ends of the slide ruler are stored in the slide groove. When working, the slide ruler is pushed by external force, and the end of it that is close to the second working surface (1-2) or the fourth working surface (1-4) extends outward from the slide groove and contacts the surface of the weld to be tested. Let h1 be the distance from the second working surface (1-2) to the farthest end of the ruler (1) on the other side, and h2 be the distance from the fourth working surface (1-4) to the farthest end of the ruler (1) on the other side, where h1 ≠ h2; The scale line includes a 0-position reference line. When the slider extends outward to connect with the planes where the two mutually perpendicular working surfaces are located, the markings or structures indicating the scale stop at the 0-position reference line. The confined space is a channel-shaped structure with an opening on one side. The channel-shaped structure has a top plate, a bottom plate, and a side plate. The top plate and the bottom plate are parallel to each other. The side plate is set between the top plate and the bottom plate and is perpendicular to the top plate and the bottom plate. The weld is located at the connection between the side plate and the bottom plate.

2. The confined space weld measurement device according to claim 1, characterized in that: The end of the slide bar that extends out of the slide groove is a tapered structure, and the tip of the tapered structure is used to contact the surface of the weld to be tested.

3. The confined space weld measurement device according to claim 1, characterized in that: The included angles between the first working surface (1-1) and the fourth working surface (1-4), the included angles between the fourth working surface (1-4) and the second working surface (1-2), and the included angles between the second working surface (1-2) and the third working surface (1-3) are all equal. One end of one of the slides is located at the middle position of the second working surface (1-2), and the other end of the slide is located at the middle position of the fourth working surface (1-4).

4. A method of confined space weld measurement, carried out on the basis of a confined space weld measurement device as claimed in any one of claims 1-3, characterized in that, Includes the following steps: Choose to perform the measurement using the front or back of the measuring device based on the size of the confined space; When measuring the front side with a measuring device, place the first working surface (1-1) against the side plate and the second working surface (1-2) against the bottom plate, so that the sliding ruler on the front side points to the weld. When using the measuring device to measure from the reverse side, place the third working surface (1-3) against the side plate and the fourth working surface (1-4) against the bottom plate, so that the sliding ruler on the reverse side points to the weld. When the weld height is 0, the scale reading of the slider is taken as the reference scale. Push the slider pointing to the weld so that its end contacts the surface of the weld. Read the scale reading corresponding to the marking or structure of the indicator scale at this time, and calculate the difference between it and the reference scale to obtain the thickness of the weld.

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