Diameter measuring device

Abstract

The utility model discloses a diameter measuring device, belongs to the technical field of metal air pipe processing, and aims to solve the problems that after a measuring tape is stretched in the prior art, one end of the measuring tape is attached to the inner wall of a metal air pipe, the other end of the measuring tape needs to be attached to the inner wall of the other side of the metal air pipe, and the measuring tape is bent, so that the two-hand operation is not convenient enough; and the reading is not clear enough. Comprising a measuring rod, a fixing rod, a limiting assembly and a horizontal bubble instrument, a groove is formed in the upper surface of the fixing rod, the horizontal bubble instrument is embedded in the groove, and a holding rod is fixedly installed on the outer wall of the fixing rod and is of an arc-shaped structure; one end of the fixing rod is of an arc-shaped structure, and a rubber pad is bonded outside the fixing rod. According to the diameter measuring device, measurement is convenient, operation is convenient, reading is clear, the diameter of the metal air pipe can be visually seen, when the diameter measuring device is folded, only the holding rod needs to be held, the fixing rod needs to be pulled towards the measuring rod, the whole measuring process can be operated with one hand, and use convenience is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal air duct processing, and particularly relates to a diameter measuring device. Background Art

[0002] Metal air ducts are typically made of metal materials, with common materials including galvanized sheet metal, stainless steel, and aluminum alloy. Depending on the material, metal air ducts can be categorized as galvanized iron, aluminum, or stainless steel. The choice of these materials depends primarily on the intended use environment, cost budget, and required performance characteristics. After processing, the inner wall diameter of the metal air duct needs to be inspected. This inspection typically involves using a tape measure. After stretching the tape, one end of the tape is placed against the inner wall of the metal air duct, while the other end is placed against the inner wall on the other side of the metal air duct and bent. This is inconvenient to operate with two hands, and the readings are often unclear. Therefore, the inventors have proposed a diameter measuring device. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] In response to the shortcomings of the existing technology, the purpose of the present utility model is to provide a diameter measuring device, which aims to solve the problem that in the existing technology, after the tape measure is stretched, one end of the tape measure is attached to the inner wall of the metal air duct, and the other end needs to be attached to the inner wall of the other side of the metal air duct and the tape measure is bent, which is not convenient to operate with both hands and the readings are not clear enough.

[0005] (2) Technical solution

[0006] In order to solve the above technical problems, the present invention provides a diameter measuring device, comprising a measuring rod, a fixed rod, a limit assembly and a bubble level, wherein the upper surface of the fixed rod has a groove, the bubble level is embedded in the groove, a grip rod is fixedly mounted on the outer wall of the fixed rod, and the grip rod is an arc-shaped structure; one end of the fixed rod is an arc-shaped structure and is bonded to the outside with a rubber pad, the end of the fixed rod opposite to the rubber pad is slidably mounted with a measuring rod, and the end of the measuring rod away from the fixed rod is mounted with a support head; the measuring rod slides into the interior of the fixed rod, and a limit assembly is provided on the fixed rod corresponding to the end of the measuring rod, the limit assembly comprises a fixed block, a push block, a drive rod and a clamp, the push block is elastically connected to the fixed block, and the drive rod is fixedly connected to the clamp. The device is convenient to measure, easy to operate, and has clear readings, allowing the diameter of the metal air duct to be intuitively seen. When folding, the user only needs to hold the grip rod and pull the fixed rod toward the measuring rod. The entire measurement process can be performed with one hand, making it highly convenient to use.

[0007] Preferably, the fixing block has a mounting groove, the push block and the mounting groove are engaged with each other, the push block slides toward the inside of the mounting groove, and the fixing block is fixedly mounted on the outer wall of the fixing rod.

[0008] Preferably, a plurality of groups of second springs are fixed in the installation groove, one end of the second spring is fixedly connected to the inner wall of the installation groove, and the other end is fixedly connected to the push block.

[0009] Preferably, the driving rod is fixedly mounted on the upper surface of the push block, and the clamping head is arranged at the other end of the driving rod away from the push block.

[0010] Preferably, a support head is fixedly mounted on one end of the measuring rod away from the fixing rod, and the support head is a semicircular structure made of rubber.

[0011] Preferably, a scale line is provided on the outer wall of the measuring rod facing the gripping rod, a limiting hole is provided on the side of the measuring rod opposite to the scale line, and the clamping head is adapted to be clamped in the limiting hole.

[0012] Preferably, the end of the measuring rod that slides into the interior of the fixed rod is fixedly connected to a slider, and the slider slides along the inner wall of the fixed rod. The end of the slider away from the measuring rod is fixedly connected to a first spring, and the first spring is horizontally arranged, and the other end is fixedly connected to the inner wall of the fixed rod.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Thanks to the pull-out setting of the fixing rod and the measuring rod, the utility model can be quickly displayed inside the metal air duct and the diameter can be measured. By pressing the limit component, the connection between the clamping head and the limit hole is released, and then the measuring rod loses the limit and can slide out along the fixing rod. Through the setting of the rubber pad and the support head, the friction with the inner wall of the metal air duct is improved, and the overall stability of the measuring device is increased. The measuring rod slides out until the support head fits with the other inner wall of the metal air duct. By observing the scale line, the sliding distance of the measuring rod can be obtained. The measurement is convenient, the operation is convenient, the readings are clear, and the diameter of the metal air duct can be intuitively seen. When folding, it is only necessary to hold the grip and pull the fixing rod in the direction of the measuring rod. The entire measurement process can be operated with one hand. It is easy to use and can be widely promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a structural diagram of the measuring rod in the extended state;

[0019] Figure 3 Schematic diagram of the connection structure between the measuring rod and the first spring;

[0020] Figure 4 It is a schematic diagram of the limit component structure.

[0021] The marks in the accompanying drawings are: 1. Fixing rod; 2. Rubber pad; 3. Groove; 4. Level bubble meter; 5. Limit assembly; 6. Measuring rod; 7. Support head; 8. Grip; 9. Scale line; 10. Limit hole; 11. Slider; 12. First spring; 13. Second spring; 14. Push block; 15. Drive rod; 16. Clamp; 17. Fixing block; 18. Mounting slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] This specific embodiment is a diameter measuring device, and its structural diagram is as follows Figure 1 、 Figure 2 As shown, it includes a measuring rod 6, a fixed rod 1, a limit assembly 5 and a level bubble meter 4. The upper surface of the fixed rod 1 has a groove 3, and the level bubble meter 4 is embedded in the groove 3. A grip rod 8 is fixedly installed on the outer wall of the fixed rod 1, and the grip rod 8 is an arc-shaped structure; one end of the fixed rod 1 is an arc-shaped structure, and a rubber pad 2 is bonded to the outside, and a measuring rod 6 is slidably installed on the end of the fixed rod 1 opposite to the rubber pad 2, and a support head 7 is installed on the end of the measuring rod 6 away from the fixed rod 1; the measuring rod 6 slides toward the inside of the fixed rod 1, and a limit assembly 5 is provided on the end of the fixed rod 1 corresponding to the measuring rod 6.

[0024] Reference Figure 2 、 Figure 3The end of the measuring rod 6 away from the fixed rod 1 is fixedly mounted with a support head 7, which is a semicircular structure made of rubber. The outer wall of the measuring rod 6 has scale lines 9 on the side facing the grip 8. The side of the measuring rod 6 opposite the scale lines 9 is provided with a limit hole 10, and the clamping head 16 is adapted to engage with the limit hole 10. The end of the measuring rod 6 that slides into the interior of the fixed rod 1 is fixedly connected to a slider 11, which slides along the inner wall of the fixed rod 1. The end of the slider 11 away from the measuring rod 6 is fixedly connected to a first spring 12. The first spring 12 is arranged horizontally, and the other end is fixedly connected to the inner wall of the fixed rod 1.

[0025] Reference Figure 4 The limiting assembly 5 includes a fixed block 17, a push block 14, a driving rod 15 and a clamp 16. The push block 14 is elastically connected to the fixed block 17, and the driving rod 15 is fixedly connected to the clamp 16. The fixed block 17 has a mounting groove 18. The push block 14 and the mounting groove 18 are engaged with each other. The push block 14 slides toward the inside of the mounting groove 18, and the fixed block 17 is fixedly mounted on the outer wall of the fixed rod 1. Multiple groups of second springs 13 are fixed in the mounting groove 18. One end of the second spring 13 is fixedly connected to the inner wall of the mounting groove 18, and the other end is fixedly connected to the push block 14. The driving rod 15 is fixedly mounted on the upper surface of the push block 14, and the clamp 16 is arranged on the other end of the driving rod 15 away from the push block 14.

[0026] Working principle: When in use, the fixing rod 1 is picked up by the grip 8. When the diameter of the inner wall of the metal air duct needs to be measured, the fixing rod 1 can be placed horizontally into the inside of the air duct. The rubber pad 2 at one end of the fixing rod 1 fits with the inner wall of the air duct. The rubber pad 2 can increase friction and improve the fitting stability of the fixing rod 1. The state of the fixing rod 1 can be adjusted by observing the level bubble meter 4 to avoid the fixing rod 1 from being offset. Then the pressing block 14 is pressed toward the inside of the mounting groove 18. The second spring 13 contracts, and the pressing block 14 drives the driving rod 15 to move synchronously. The driving rod 15 is forced to drive the clamping head 16 to move. The clamping head 16 withdraws from the inside of the limiting hole 10, and then the measuring rod 6 loses its limit. The first spring 12 can be reset and popped out, and the slider 11 is pushed along the inner wall of the fixing rod 1. The measuring rod 6 slides out until the support head 7 fits with the other inner wall of the metal air duct. By observing the scale line 9, the sliding distance of the measuring rod 6 can be obtained. In the original fixed state of the measuring rod 6, the value is fixed. Therefore, the sliding distance plus the fixed value in the original state can be added to the fixed value, and the inner diameter of the metal air duct can be obtained. The measurement is convenient, the operation is convenient, the reading is clear, and the diameter of the metal air duct can be intuitively seen. After the measurement is completed, you only need to hold the grip 8 and pull the fixing rod 1 toward the direction of the measuring rod 6. The measuring rod 6 can be retracted toward the inside of the fixing rod 1. At this time, the first spring 12 is compressed. At this time, the clamping head 16 slides along the outer wall of the measuring rod 6 until it corresponds to the limiting hole 10 again. Then the second spring 13 resets, driving the clamping head 16 to be re-clamped into the limiting hole 10, completing the storage of the measuring rod 6. Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A diameter measuring device, comprising a measuring rod (6), a fixing rod (1), a limit assembly (5) and a bubble level (4), characterized in that: The upper surface of the fixing rod (1) has a groove (3), the bubble level (4) is embedded in the groove (3), and a gripping rod (8) is fixedly mounted on the outer wall of the fixing rod (1), and the gripping rod (8) is an arc-shaped structure; One end of the fixing rod (1) is an arc-shaped structure, and a rubber pad (2) is bonded to the outside; a measuring rod (6) is slidably mounted on the end of the fixing rod (1) opposite to the rubber pad (2); and a support head (7) is mounted on the end of the measuring rod (6) away from the fixing rod (1); The measuring rod (6) slides into the interior of the fixing rod (1); a limiting assembly (5) is provided on the fixing rod (1) at one end corresponding to the measuring rod (6); the limiting assembly (5) comprises a fixing block (17), a pressing block (14), a driving rod (15) and a clamping head (16); the pressing block (14) is elastically connected to the fixing block (17); and the driving rod (15) is fixedly connected to the clamping head (16).

2. A diameter measuring device according to claim 1, characterized in that: The fixed block (17) has a mounting groove (18), the push block (14) and the mounting groove (18) are engaged with each other, the push block (14) slides toward the inside of the mounting groove (18), and the fixed block (17) is fixedly mounted on the outer wall of the fixed rod (1).

3. A diameter measuring device according to claim 2, characterized in that: A plurality of groups of second springs (13) are fixed in the installation groove (18), one end of the second spring (13) is fixedly connected to the inner wall of the installation groove (18), and the other end is fixedly connected to the pressing block (14).

4. A diameter measuring device according to claim 1, characterized in that: The driving rod (15) is fixedly mounted on the upper surface of the pressing block (14), and the clamping head (16) is arranged at the other end of the driving rod (15) away from the pressing block (14).

5. The diameter measuring device according to claim 1, characterized in that: A support head (7) is fixedly mounted on one end of the measuring rod (6) away from the fixing rod (1); the support head (7) is a semicircular structure made of rubber.

6. A diameter measuring device according to claim 5, characterized in that: A scale line (9) is provided on the outer wall of the measuring rod (6) facing the gripping rod (8), and a limiting hole (10) is provided on the side of the measuring rod (6) opposite to the scale line (9), and the clamping head (16) is adapted to be clamped in the limiting hole (10).

7. The diameter measuring device according to claim 1, characterized in that: One end of the measuring rod (6) that slides into the interior of the fixed rod (1) is fixedly connected to a slider (11), and the slider (11) slides in contact with the inner wall of the fixed rod (1). One end of the slider (11) that is away from the measuring rod (6) is fixedly connected to a first spring (12), and the first spring (12) is arranged horizontally, and the other end is fixedly connected to the inner wall of the fixed rod (1).

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