Strain measuring point positioning device for ship rib web

Abstract

The invention relates to a strain measuring point positioning device for a ship rib web, which comprises a first supporting mechanism and a second supporting mechanism, the first supporting mechanism comprises two first ruler rods hinged to each other, and the second supporting mechanism comprises two second ruler rods hinged to each other. The two ends of the first supporting mechanism are correspondingly hinged to the two ends of the second supporting mechanism through the two ruler shafts, so that the two first ruler rods and the two second ruler rods define a parallelogram structure. A straight ruler is fixed to the end of one ruler shaft, a sliding way is formed in the middle of the end face of the straight ruler, a sliding key is slidably installed in the sliding way, and a scriber used for scribing on the surface of the web is arranged on the sliding key. And a fixed slide block is fixed at the end of the other ruler shaft and is mounted in the slide way in a matched manner. By arranging the first supporting mechanism and the second supporting mechanism, rapid and accurate positioning of the rib web half-height measuring point can be achieved, the positioning process is simplified, the positioning efficiency is improved, and the positioning precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship structure strain measurement test, in particular to a strain measurement point positioning device for ship rib webs. Background Art

[0002] Marine ribs are key components to ensure the strength and stability of ship structures. They can take into account both the weight and stability of the ship. On the basis of slightly increasing the weight of the ship, they can greatly increase the section moment of inertia of the hull plate, thereby improving the stability of the ship structure. Therefore, they are widely used in various types of ships and marine structures such as surface ships, submarines, deep-sea submersibles, and offshore platforms. Rib strength is also the focus of real ship monitoring or model test assessment. The current steel ship classification regulations and submarine structure design calculation methods all give relevant regulations on the allowable value of rib stress, and strain measurement is an effective way to assess the rib stress level. The rib strain measurement points are divided into panel measurement points and web measurement points. The web measurement points include the measurement points at the connection between the top of the web and the panel, the measurement points at the connection between the root of the web and the main shell plate, and the measurement points at the half-height of the web. Strain gauges are arranged along the length of the rib to measure the structural strain in the length direction of the rib.

[0003] In the prior art, when positioning the strain measurement points at the half-height of the rib web, a square is generally used for height measurement and positioning: a normal line perpendicular to the hull plate is drawn on the web, the length of the normal line (i.e. the web height) is measured and taken in the middle, and a vertical line perpendicular to the normal line is drawn at the midpoint to obtain the positioning line. This method of measuring point positioning has the following disadvantages:

[0004] (1) To obtain the normal line, a tool such as a square or angle ruler is required. When the web height is small, it is likely that the tool will not fit in due to its large size.

[0005] (2) When the web height is large, the normal line needs to be extended to obtain the web height, which can easily cause angle deflection and lead to operational errors;

[0006] (3) It is necessary to go through the steps of drawing lines, measuring, centering, and making vertical lines, which is cumbersome and easily leads to error accumulation. Summary of the invention

[0007] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a strain measurement point positioning device for ship rib webs with a reasonable structure. By setting a first supporting mechanism and a second supporting mechanism, it is possible to quickly and accurately position the measuring points at the half height of the rib web, simplify the positioning process, improve the positioning efficiency, and improve the positioning accuracy.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A strain measuring point positioning device for a ship rib web, comprising a first supporting mechanism and a second supporting mechanism, wherein the first supporting mechanism comprises two mutually hinged first ruler rods, and the second supporting mechanism comprises two mutually hinged second ruler rods, and two ends of the first supporting mechanism are respectively hinged to two ends of the second supporting mechanism through two ruler shafts, so that the two first ruler rods and the two second ruler rods are combined to form a parallelogram structure;

[0010] A marking ruler is fixed to the end of a ruler shaft, a slideway is provided in the middle of the end face of the marking ruler, a sliding key is slidably installed in the slideway, and a marking needle for marking on the surface of the web is provided on the sliding key;

[0011] A fixed slider is fixed to the end of the other ruler shaft, and the fixed slider is installed in the slideway;

[0012] By adjusting the installation position of the fixed slider in the slide, the vertical distance between the working end faces of the first support mechanism and the second support mechanism is adjusted, so that the working end face of the first support mechanism is close to the bottom wall surface of the panel, and the working end face of the second support mechanism is close to the top wall surface of the shell plate. The sliding key is moved along the length direction of the slide, so that the positioning line is drawn on the surface of the web by the marking needle.

[0013] As a further improvement of the above technical solution:

[0014] The structure of the first support mechanism is as follows: it includes two first ruler rods, the two first ruler rods are hinged via a first connecting hinge shaft, a support block is fixed on the outer circumferential surface of the first connecting hinge shaft, and the top end surface of the support block corresponds to the working end surface of the first support mechanism.

[0015] The top end surface of the support block is processed by filing.

[0016] Pressing plates are fixed on the two first ruler rods.

[0017] The structure of the second support mechanism is as follows: it includes two second ruler rods, which are hinged via a second connecting hinge shaft, a positioning ruler is fixed on the outer circumferential surface of the second connecting hinge shaft, and the bottom end face of the positioning ruler corresponds to the working end face of the second support mechanism.

[0018] Two slide grooves are arranged on the top end surface of the positioning ruler, and the two slide grooves are respectively installed in cooperation with one end of two support rods, and the other end of the two support rods are respectively hinged with the two second ruler rods.

[0019] The end of a single support rod is mounted in cooperation with a corresponding slide groove through a slide pin.

[0020] Positioning pointers are respectively mounted on the opposite end surfaces of the positioning ruler.

[0021] A torsion spring is installed on the outer circumferential surface of a single ruler shaft, one end of the torsion spring is connected to the corresponding end of the first support mechanism, and the other end of the torsion spring is connected to the corresponding end of the second support mechanism, thereby realizing self-reset between the first support mechanism and the second support mechanism.

[0022] The face plate is arranged in parallel with the shell plate, the web is arranged perpendicular to the face plate, and the web is arranged perpendicular to the shell plate, so that an I-shaped structure is formed between the face plate, the shell plate and the web.

[0023] The beneficial effects of the present invention are as follows:

[0024] The present invention has a compact and reasonable structure and is easy to operate. By setting the first supporting mechanism and the second supporting mechanism, the steps of line drawing, distance measurement and centering in the traditional positioning process can be omitted, and rapid centering and positioning of strain measuring points of marine rib webs at different heights can be achieved. The operation is simple, convenient and fast; at the same time, it can effectively avoid operating errors and error accumulation, and improve positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0027] Figure 3 for Figure 1 Side view of.

[0028] Figure 4 It is a schematic structural diagram of the second supporting mechanism in the present invention.

[0029] Figure 5 The present invention is schematically shown in the working state. Figure 1 .

[0030] Figure 6 The present invention is schematically shown in the working state. Figure 2 .

[0031] Among them: 1. first supporting mechanism; 2. second supporting mechanism; 3. ruler shaft; 4. torsion spring; 5. marking ruler; 6. slideway; 7. sliding key; 8. marking needle; 9. fixed slider; 10. web plate; 11. panel; 12. shell plate;

[0032] 101, first ruler rod; 102, first connecting hinge shaft; 103, support block; 104, pressing plate;

[0033] 201, second ruler rod; 202, second connecting hinge shaft; 203, positioning ruler; 204, positioning pointer; 205, slide groove; 206, support rod. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0035] The structure and function of the present invention are as follows:

[0036] like Figure 1-Figure 6 As shown, a strain measuring point positioning device for a ship rib web comprises a first supporting mechanism 1 and a second supporting mechanism 2, wherein the first supporting mechanism 1 comprises two first ruler rods 101 hinged to each other, and the second supporting mechanism 2 comprises two second ruler rods 201 hinged to each other, and the two ends of the first supporting mechanism 1 are respectively hinged to the two ends of the second supporting mechanism 2 through two ruler shafts 3, so that the two first ruler rods 101 and the two second ruler rods 201 are combined into a parallelogram structure; a marking ruler 5 is fixed at the end of one ruler shaft 3, a slideway 6 is provided in the middle of the end surface of the marking ruler 5, and a sliding key 7 is slidably installed in the slideway 6. , a marking needle 8 for marking on the surface of the web 10 is provided on the sliding key 7; a fixed slider 9 is fixed to the end of the other ruler shaft 3, and the fixed slider 9 is installed in the slideway 6; by adjusting the installation position of the fixed slider 9 in the slideway 6, the vertical distance between the working end surface of the first support mechanism 1 and the working end surface of the second support mechanism 2 is adjusted, so that the working end surface of the first support mechanism 1 is close to the bottom wall surface of the panel 11, and the working end surface of the second support mechanism 2 is close to the top wall surface of the shell plate 12, and the sliding key 7 is moved along the length direction of the slideway 6, so that the positioning line is marked on the surface of the web 10 by the marking needle 8.

[0037] In the present invention, the ship rib is installed on the ship shell 12, and the ship rib includes a panel 11 and a web 10. The panel 11 and the shell 12 are arranged in parallel, and the web 10 and the panel 11 are arranged vertically, and the web 10 and the shell 12 are arranged vertically, so that an I-shaped structure is formed between the panel 11, the shell 12 and the web 10.

[0038] The strain measuring point positioning device of the present invention comprises a first supporting mechanism 1, a second supporting mechanism 2, a ruler shaft 3, a marking ruler 5, a slideway 6, a sliding key 7, a marking needle 8, and a fixed slide block 9; wherein,

[0039] like Figure 1 , Figure 3 As shown, the structure of the first support mechanism 1 is as follows: it includes two first ruler rods 101, the two first ruler rods 101 are hingedly connected by a first connecting hinge shaft 102, a support block 103 is fixed on the outer circumferential surface of the first connecting hinge shaft 102, and the top end surface of the support block 103 corresponds to the working end surface of the first support mechanism 1; the first support mechanism 1 is used to fit with the ship rib panel 11;

[0040] like Figure 1 , Figure 4As shown, the structure of the second support mechanism 2 is as follows: it includes two second ruler rods 201, the two second ruler rods 201 are hingedly connected by a second connecting hinge shaft 202, a positioning ruler 203 is fixed on the outer circumferential surface of the second connecting hinge shaft 202, and the bottom end surface of the positioning ruler 203 corresponds to the working end surface of the second support mechanism 2; the second support mechanism 2 is used to fit with the ship shell plate 12;

[0041] In the present invention, the two first ruler rods 101 and the two second ruler rods 201 are metal rods of equal length, and have high rigidity, which can prevent deformation during the marking process and avoid affecting the marking accuracy;

[0042] like Figure 1-Figure 2 As shown, the end of a single first ruler rod 101 is rotatably mounted on the outer circumferential surface of the corresponding ruler shaft 3, and the end of a single second ruler rod 201 is rotatably mounted on the outer circumferential surface of the corresponding ruler shaft 2; at the same time, a torsion spring 4 is cooperatively mounted on the outer circumferential surface of the single ruler shaft 3, one end of the torsion spring 4 is connected to the corresponding end of the first support mechanism 1, and at the same time, the other end of the torsion spring 4 is connected to the corresponding end of the second support mechanism 2, thereby realizing self-reset between the first support mechanism 1 and the second support mechanism 2; the torsion spring 4 provides supporting force for the corresponding first ruler rod 101 and the corresponding second ruler rod 201, so that the first support mechanism 1 and the second support mechanism 2 have an automatic reset function, which is convenient for measurement.

[0043] The top end surface of the support block 103 is processed by filing, which can increase the friction between the support block 103 and the panel 11, so that the first support mechanism 1 can firmly lock the top end surface of the panel 11 to prevent its displacement from affecting the test accuracy.

[0044] Two slide grooves 205 are provided on the top end surface of the positioning ruler 203, and the two slide grooves 205 are respectively mounted with one end of two support rods 206, and the other ends of the two support rods 206 are respectively hinged with the two second ruler rods 201; the support rods 206 are used to support the corresponding second ruler rods 201, thereby improving the structural stability of the second support mechanism 2;

[0045] The end of a single support rod 206 is installed in cooperation with the corresponding slide groove 205 through a sliding pin; a serrated ridge is provided on the inner bottom wall of the slide groove 205, and the end of the sliding pin can be stuck between two adjacent ridges, thereby limiting and fixing the support rod 206, ensuring that the support rod 206 can provide stable support for the corresponding second ruler rod 201.

[0046] Positioning pointers 204 are respectively installed on the opposite side end faces of the positioning ruler 203; the positioning pointer 204 corresponds to the busbar set on the top end face of the shell plate 12. The busbar on the shell plate 12 is locked by the positioning pointer 204, thereby preliminarily locating the marking position of the strain measurement point positioning device.

[0047] A pressure plate 104 is fixed on each of the two first ruler rods 101, and an anti-slip filing surface is provided on the top end faces of the two pressure plates 104. By providing the pressure plate 104, it is convenient for the operator to press the first support mechanism 1 to adjust the vertical distance between the working end faces of the first support mechanism 1 and the working end faces of the second support mechanism 2.

[0048] The marking ruler 5 is fitted with the end surface of the web 10, and a slideway 6 is provided on it. A sliding key 7 is slidably installed in the slideway 6, and a marking needle 8 is provided on the sliding key 7 for marking on the surface of the web 10; a fixed slider 9 is installed in the slideway 6, and the installation position of the fixed slider 9 in the slideway 6 is adjusted according to the height of the web 10. After the installation position is determined, the fixed slider 9 can be fixed in the slideway 6 by connecting bolts to prevent it from displacement;

[0049] In addition, in order to ensure the stability of the device during operation, the slide 6 can adopt a T-shaped slide or a cross-shaped slide, and the sliding key 7 and the fixed slider 9 both adopt a T-shaped structure or a cross-shaped structure to prevent the sliding key 7 and the fixed slider 9 from falling out of the slide 6.

[0050] The working process of the present invention is as follows:

[0051] The busbar on the shell plate 12 is locked by the positioning pointer 204, thereby determining the placement position of the strain measurement point positioning device as a whole, and the connecting bolts used to fix the fixed slider 9 are removed;

[0052] Press the pressing plate 104 so that the overall height of the strain measuring point positioning device (i.e., the vertical distance between the top end surface of the support block 103 and the bottom end surface of the positioning ruler 203) is smaller than the height of the web 10, thereby placing the strain measuring point positioning device as a whole between the face plate 11 and the shell plate 12;

[0053] The pressure plate 104 is released. Under the action of the torsion spring 4, the top end surface of the support block 103 is in close contact with the bottom end surface of the panel 11, and the bottom end surface of the positioning ruler 203 is in close contact with the top end surface of the shell plate 12. Then, the fixed slider 9 is fixed in the slideway 6 by connecting bolts, so that the overall height of the strain measurement point positioning device remains stable.

[0054] The strain measuring point positioning device is moved integrally along the generatrix on the shell plate 12 so that the marking ruler 5 is closely attached to the end surface of the web 10 , and then the sliding key 7 is moved to draw a positioning line on the surface of the web 10 through the marking needle 8 .

[0055] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A strain measuring point positioning device for ship rib web, characterized in that: The invention comprises a first support mechanism (1) and a second support mechanism (2), wherein the first support mechanism (1) comprises two first ruler rods (101) hinged to each other, and the second support mechanism (2) comprises two second ruler rods (201) hinged to each other, and the two ends of the first support mechanism (1) are respectively hinged to the two ends of the second support mechanism (2) via two ruler shafts (3), so that the two first ruler rods (101) and the two second ruler rods (201) are combined to form a parallelogram structure; A marking ruler (5) is fixed to the end of a ruler shaft (3), a slideway (6) is provided in the middle of the end surface of the marking ruler (5), a sliding key (7) is slidably installed in the slideway (6), and a marking needle (8) for marking on the surface of the web (10) is provided on the sliding key (7); A fixed slider (9) is fixed to the end of the other ruler shaft (3), and the fixed slider (9) is mounted in the slideway (6); By adjusting the installation position of the fixed slider (9) in the slideway (6), the vertical distance between the working end surface of the first support mechanism (1) and the working end surface of the second support mechanism (2) is adjusted, so that the working end surface of the first support mechanism (1) is closely attached to the bottom wall surface of the panel (11), and the working end surface of the second support mechanism (2) is closely attached to the top wall surface of the shell plate (12). The sliding key (7) is moved along the length direction of the slideway (6), so that a positioning line is drawn on the surface of the web (10) by the marking needle (8).

2. A strain measuring point positioning device for a ship rib web as claimed in claim 1, characterized in that: The structure of the first support mechanism (1) is as follows: it comprises two first ruler rods (101), the two first ruler rods (101) are hingedly connected via a first connecting hinge shaft (102), a support block (103) is fixed on the outer circumferential surface of the first connecting hinge shaft (102), and the top end surface of the support block (103) corresponds to the working end surface of the first support mechanism (1).

3. A strain measuring point positioning device for a ship rib web as claimed in claim 2, characterized in that: The top end surface of the support block (103) is processed by filing.

4. The strain measuring point positioning device for a ship rib web as claimed in claim 2, characterized in that: A pressing plate (104) is fixed on each of the two first ruler rods (101).

5. The strain measuring point positioning device for a ship rib web as claimed in claim 1, characterized in that: The structure of the second support mechanism (2) is as follows: it comprises two second ruler rods (201), the two second ruler rods (201) are hingedly connected via a second connecting hinge shaft (202), a positioning ruler (203) is fixed on the outer circumferential surface of the second connecting hinge shaft (202), and the bottom end surface of the positioning ruler (203) corresponds to the working end surface of the second support mechanism (2).

6. A strain measuring point positioning device for a ship rib web as claimed in claim 5, characterized in that: Two slide grooves (205) are provided on the top end surface of the positioning ruler (203), and the two slide grooves (205) are respectively mounted in cooperation with one end of two support rods (206), and the other ends of the two support rods (206) are respectively hinged to the two second ruler rods (201).

7. A strain measuring point positioning device for a ship rib web as claimed in claim 6, characterized in that: The end of a single support rod (206) is mounted in cooperation with the corresponding slide groove (205) via a slide pin.

8. The strain measuring point positioning device for a ship rib web as claimed in claim 5, characterized in that: Positioning pointers (204) are respectively mounted on the opposite side end surfaces of the positioning ruler (203).

9. The strain measuring point positioning device for a ship rib web as claimed in claim 1, characterized in that: A torsion spring (4) is mounted on the outer circumferential surface of the single ruler shaft (3), one end of the torsion spring (4) is connected to the corresponding end of the first support mechanism (1), and the other end of the torsion spring (4) is connected to the corresponding end of the second support mechanism (2), thereby realizing self-reset between the first support mechanism (1) and the second support mechanism (2).

10. The strain measuring point positioning device for ship rib web according to claim 1, characterized in that: The panel (11) and the shell plate (12) are arranged in parallel, the web plate (10) and the panel (11) are arranged perpendicularly, and the web plate (10) and the shell plate (12) are arranged perpendicularly, so that an I-shaped structure is formed between the panel (11), the shell plate (12) and the web plate (10).

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