A large-diameter pipe inner diameter measurement gauge positioning device

Abstract

The utility model discloses a large diameter pipeline inner diameter measurement dispatches the device of scale positioning, related to pipeline inner diameter inspection technical field, including central support rod, central telescopic rod, main support frame, vice support frame, main support pole and vice support pole, central telescopic rod upper portion telescopic along central support rod lower part inboard, central support rod upper end both sides symmetry articulates main support frame, and the vice support frame is articulated to the main support frame end, be equipped with the main support pole between main support frame and central support rod, be equipped with vice support pole between vice support frame and central support rod, the utility model discloses through to dispatch the scale support, can fast dispatch the scale positioning, make dispatch the scale to stick in the large diameter pipeline inboard, need not many people to assist, can carry out pipeline inner diameter measurement, accurate reading, and the measurement is quick, convenient, efficient, simple operation.

Description

Technical Field

[0001] This utility model relates to the field of pipe inner diameter inspection technology, and in particular to a positioning device for measuring the inner diameter of large-diameter pipes. Background Technology

[0002] Currently, the inner diameter of large-diameter pipes in water transmission pipelines is mainly measured using inside micrometers and inside diameter measuring tapes. While inside micrometers offer high accuracy, they require advanced technical skills, are complex to operate, and take a long time. Multiple measurements of the same cross-section are often necessary, and the data must be averaged to obtain the final measurement. Inside diameter measuring tapes, on the other hand, are convenient, quick, and portable. The tape consists of a high-precision elastic steel strip (available in stainless steel and spring steel), with main and vernier scale segments engraved at both ends. The main scale segment has a graduation of 0.5mm, and the vernier scale segment has a graduation of 0.02mm. Using the vernier reading principle, the average pipe diameter is directly read through circumferential measurement. Because the steel strip is thin and has low internal stress, the reading is unaffected by temperature changes, ensuring stable accuracy and a long service life. The operation is as follows: Place the measuring tape inside the pipe, circle it around the inner wall of the pipe, keep it in the same cross-sectional position, hold both ends of the measuring tape firmly with both hands, apply left and right pushing force, and rub it back and forth a few times. The measuring tape should be in close contact with the inner wall of the pipe without any gaps. Then you can get the reading you want to measure.

[0003] In existing water pipeline construction projects, large-diameter pipes must pass inspection before use. The inspection mainly focuses on the appearance of the pipes, with one aspect being the pipe diameter. This involves verifying that the pipe diameter meets the design requirements. Pipe diameter is measured using a measuring tape. While a single person can operate the tape for small-diameter pipes, two to three people are needed to support the tape against the inner wall of the pipe. For pipes exceeding the support height, a stool or ladder is required. One person holds both ends of the tape at the bottom, adjusting its position to ensure it is straight and without gaps before reading the measurement. Currently, the common method still involves two to four people supporting the tape, with three supporting the tape and one adjusting the reading. For slightly larger pipes, tools are also needed to support the top of the pipe in the measurement area. This method is frequently used, labor-intensive, and time-consuming, making it inconvenient for measuring larger pipes. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of inconvenience in measuring the inner diameter of large-diameter water transmission pipelines during the quality control process of pipeline acceptance, and to provide a positioning device for measuring the inner diameter of large-diameter pipelines.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A positioning device for measuring the inner diameter of a large-diameter pipe includes a central support rod, a central telescopic rod, a main support frame, a secondary support frame, a main support rod, and a secondary support rod. The upper part of the central telescopic rod extends and retracts along the inner side of the lower part of the central support rod. The main support frame is symmetrically hinged to both sides of the upper end of the central support rod, and a secondary support frame is hinged to the end of each main support frame. A main support rod is provided between the main support frame and the central support rod, and a secondary support rod is provided between the secondary support frame and the central support rod.

[0007] Furthermore, a first locking handle is sleeved on the upper outer side of the central support rod, and the main support rod is hinged between the main support frame and the first locking handle.

[0008] Furthermore, the lower end of the central support rod is provided with a second locking handle for positioning the central telescopic rod.

[0009] Furthermore, an inverted U-shaped frame is connected to the lower end of the central telescopic rod.

[0010] Furthermore, a third locking handle is sleeved on the outer side of the middle part of the central support rod, and limit blocks are rotatably connected to the upper two sides of the third locking handle. The upper end of the secondary support rod is hinged to the secondary support frame, and the lower part of the secondary support rod slides through the limit block. A first screw for positioning the secondary support rod is provided on one side wall of the limit block.

[0011] Furthermore, both the main support frame and the secondary support frame are equipped with several magnet blocks.

[0012] Furthermore, both the main support frame and the secondary support frame are made of elastic steel strips.

[0013] Furthermore, both the central support rod and the central telescopic rod are made of steel pipe; both the main support rod and the secondary support rod are made of aluminum alloy.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model is easy to use and operate. The device has a simple structure, is easy to process, has low cost, and is convenient to operate. It can quickly place the inner diameter gauge on the positioning device, so that the inner diameter gauge can be quickly positioned on the inner wall of the pipe to be measured, and the value can be read accurately and efficiently, ensuring the accuracy of water pipeline acceptance inspection. In actual operation, it saves labor and acceptance inspection time. It is convenient to operate and assists in accurate, fast and efficient measurement and positioning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the secondary support rod positioning of this utility model.

[0018] Figure 3This is a schematic diagram of the inverted U-shaped frame of this utility model.

[0019] Figure 4 This is a schematic diagram of the magnet block of this utility model.

[0020] Figure 5 This is a schematic diagram of the second screw of this utility model.

[0021] In the diagram: 1. Central support rod; 2. Central telescopic rod; 3. Third locking handle; 4. First locking handle; 5. Secondary support rod; 6. Secondary support frame; 7. Main support rod; 8. Main support frame; 9. Second locking handle; 10. Inverted U-shaped frame; 11. Magnet block; 12. Limiting block; 13. First screw; 14. Second screw; 15. Inner diameter measuring tape. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] Specific embodiments of the large-diameter pipe inner diameter measuring and positioning device provided by this utility model:

[0024] Please see Figure 1-5 The large-diameter pipe inner diameter measuring and positioning device includes a central support rod 1, a central telescopic rod 2, a main support frame 8, a secondary support frame 6, a main support rod 7, and a secondary support rod 5.

[0025] Both the central support rod 1 and the central telescopic rod 2 are made of steel pipes, preferably stainless steel pipes.

[0026] The upper part of the central telescopic rod 2 extends and retracts along the inner side of the lower part of the central support rod 1. A second locking handle 9 is provided at the lower end of the central support rod 1 to position the central telescopic rod 2. The position of the second locking handle 9 on the central support rod 1 is not adjustable. The second locking handle 9 has a tubular structure, and the central telescopic rod 2 passes through it. A second screw 14 is installed on one side wall of the second locking handle 9. The second screw 14 is threadedly connected to the second locking handle 9, and its inner end abuts against the central telescopic rod 2, thus positioning the extension length of the central telescopic rod 2.

[0027] The lower end of the central telescopic rod 2 is connected to an inverted U-shaped frame 10. After the central telescopic rod 2 extends, the inverted U-shaped frame 10 can abut against the lower end of the inner wall of the pipe; in this way, the central support rod 1 and the central telescopic rod 2 are supported between the upper and lower ends of the pipe. The inverted U-shaped frame 10 allows the inner diameter measuring tape 15 to pass through, making it convenient for the inner diameter measuring tape 15 to measure the inner diameter of the pipe.

[0028] A support block is provided at the upper end of the central support rod 1, which presses the upper part of the inner diameter measuring tape 15 against the upper end of the inner wall of the pipe. The main support frame 8 is symmetrically hinged to both sides of the support block. A main support rod 7 is provided between the middle of the main support frame 8 and the central support rod 1. There are two main support frames 8 and two main support rods 7.

[0029] A first locking handle 4 is sleeved on the outer side of the upper part of the central support rod 1. The first locking handle 4 is a tubular structure and can slide along the outer side of the central support rod 1. The main support rod 7 is hinged between the inner side of the middle part of the main support frame 8 and the first locking handle 4.

[0030] A second screw 14 is inserted through one side wall of the first locking handle 4. The second screw 14 is threadedly connected to the first locking handle 4, and its inner end abuts against the central support rod 1, which can realize the positioning of the first locking handle 4 on the central support rod 1. By adjusting the position of the first locking handle 4, the main support rod 7 can be used to press the main support frame 8 against the inner side of the upper part of the pipe, thereby pressing the inner diameter gauge 15 against the inner side of the upper part of the pipe.

[0031] Each end of the main support frame 8 is hinged to a secondary support frame 6; a secondary support rod 5 is provided between the middle of the secondary support frame 6 and the central support rod 1. Specifically, a third locking handle 3 is sleeved on the outer side of the middle of the central support rod 1, and limit blocks 12 are rotatably connected to the upper two sides of the third locking handle 3. The upper end of the secondary support rod 5 is hinged to the middle of the secondary support frame 6, and the lower part of the secondary support rod 5 slides through the limit block 12; a first screw 13 for positioning the secondary support rod 5 is provided on one side wall of the limit block 12. Tightening the first screw 13 can fix the secondary support rod 5.

[0032] There are two limit blocks 12, which are symmetrically rotated and installed on both sides of the third locking handle 3. There are two first screws 13, which are used to position the two auxiliary support rods 5 at the limit blocks 12.

[0033] The third locking handle 3 is a tubular structure. The third locking handle 3 can slide along the outside of the central support rod 1. A second screw 14 is provided on one side wall of the third locking handle 3. The second screw 14 is connected to the third locking handle 3 by a thread, and its inner end abuts against the central support rod 1, which can realize the positioning of the third locking handle 3 on the central support rod 1.

[0034] The auxiliary support rod 5, which can slide along the inner side of the limiting block 12 outside the third locking handle 3, can support the auxiliary support frame 6, so that the auxiliary support frame 6 is close to the inner wall of the pipe, thereby pressing the inner diameter measuring tape 15 against the inner side of the pipe. The structure of the auxiliary support rod 5 sliding along the limiting block 12 can adapt to the measurement of pipes with different inner diameters.

[0035] In this embodiment, both the main support rod 7 and the auxiliary support rod 5 are made of aluminum alloy. In some other embodiments, the locking handle can be positioned using other structures instead of the second screw 14.

[0036] In order to make the inner diameter gauge 15 fit better with the inner wall of the pipe, the main support frame 8 and the secondary support frame 6 are both elastic steel strips. The main support frame 8 and the secondary support frame 6 are equipped with several magnet blocks 11. Specifically, openings are made on the main support frame 8 and the secondary support frame 6, and then the magnet blocks 11 are fixedly embedded in the holes.

[0037] The magnet 11 can be attracted to the inside of the pipe, so that the main support frame 8 and the secondary support frame 6 made of elastic steel press the inner diameter gauge 15 against the inside of the pipe, so that they fit tightly and measure accurately.

[0038] Before use, place the middle section of the inner diameter gauge 15 on top of the central support rod 1, so that the positioning device is placed vertically inside the pipe being measured, with the top of the central support rod 1 aligned with the center of the top of the pipe. Loosen the second locking handle 9, and the bottom of the central telescopic rod 2 presses against the bottom of the pipe. Fix the second locking handle 9. Then, loosen the third locking handle 3 and the first locking handle 4, and slide the first locking handle 4 upwards, so that the main support rod 7 pushes open the main support frame 8. The main support frame 8 is attracted by the magnet 11, so that the inner diameter gauge 15 is pressed tightly against the inner wall of the pipe. Fix the first locking handle 4. Adjust the auxiliary support frame 6 and the third locking handle 3 to slide up and down, so that the auxiliary support rod 5 pushes the auxiliary support frame 6. The auxiliary support frame 6 is attracted by the magnet 11, so that the inner diameter gauge 15 is pressed tightly against the inner wall of the pipe. Fix the third locking handle 3 and the auxiliary support rod 5, so that the lower part of the inner diameter gauge 15 is in contact with the lower inner wall of the pipe. The reading is completed when the two ends of the inner diameter gauge 15 are aligned with the scale lines.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning device for measuring the inner diameter of a large-diameter pipe, characterized in that, It includes a central support rod (1), a central telescopic rod (2), a main support frame (8), a secondary support frame (6), a main support rod (7), and a secondary support rod (5); the upper part of the central telescopic rod (2) extends and retracts along the lower inner side of the central support rod (1); the main support frame (8) is symmetrically hinged on both sides of the upper end of the central support rod (1), and the secondary support frame (6) is hinged at the end of the main support frame (8); a main support rod (7) is provided between the main support frame (8) and the central support rod (1), and a secondary support rod (5) is provided between the secondary support frame (6) and the central support rod (1).

2. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 1, characterized in that, The upper outer side of the central support rod (1) is fitted with a first locking handle (4), and the main support rod (7) is hinged between the main support frame (8) and the first locking handle (4).

3. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 1, characterized in that, The lower end of the central support rod (1) is provided with a second locking handle (9) for positioning the central telescopic rod (2).

4. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 1 or 3, characterized in that, The lower end of the central telescopic rod (2) is connected to an inverted U-shaped frame (10).

5. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 1, characterized in that, The central support rod (1) is fitted with a third locking handle (3) on the outer side of the middle part. The upper two sides of the third locking handle (3) are rotatably connected to limit blocks (12). The upper end of the secondary support rod (5) is hinged to the secondary support frame (6). The lower part of the secondary support rod (5) slides through the limit block (12). The first screw (13) for positioning the secondary support rod (5) is provided on one side wall of the limit block (12).

6. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 1, characterized in that, Both the main support frame (8) and the secondary support frame (6) are provided with several magnet blocks (11).

7. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 6, characterized in that, Both the main support frame (8) and the secondary support frame (6) are made of elastic steel strips.

8. The positioning device for measuring the inner diameter of a large-diameter pipe according to claim 1, characterized in that, The central support rod (1) and the central telescopic rod (2) are both steel pipes; the main support rod (7) and the auxiliary support rod (5) are both aluminum alloy rods.

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