Rapid measuring device for inner diameter of pipe fitting

Abstract

The utility model relates to the technical field of measuring rulers, and discloses a pipe fitting inner diameter rapid measuring device which comprises a first measuring rod, a supplement rod and a second measuring rod, the upper end of the first measuring rod is fixedly connected with a first connector, the lower end of the supplement rod is provided with a screw groove and is in threaded connection with the first connector, and the upper end of the supplement rod is fixedly connected with a second connector. The lower end of the second measuring rod is provided with a connecting groove and is in threaded connection with the second connector or the first connector. The detachable supplementary rod is arranged between the first measuring rod and the second measuring rod, flexible adjustment of the overall length of the measuring device is achieved in a threaded connection mode, the measuring device can meet the requirements for measuring the inner diameters of pipe fittings of different depths and specifications, and meanwhile through a series transmission structure of the first transmission shaft and the second transmission shaft, the shifting block is matched for driving from the outside; the measuring scale can be locked after measurement, so that the whole device can be taken out of the pipe fitting for reading when the measuring scale cannot be horizontally seen, and the measuring efficiency and the operation convenience are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of measuring ruler technology, and in particular to a device for rapid measurement of the inner diameter of pipe fittings. Background Technology

[0002] Pipe fitting inner diameter inspection is the measurement of the inner diameter of tubular parts such as pipes and sleeves. This indicator is related to whether the parts can be assembled with each other and whether the sealing performance meets the standards, so it must be checked in many manufacturing processes.

[0003] When inspecting the inner diameter of pipe fittings, contact measurements are mostly used, such as vernier calipers and inside micrometers. For example, the Chinese utility model patent published under publication number CN222617814U, entitled "A Pipe Inner Diameter Measuring Tool," includes a main scale. One end of the main scale has a depth gauge, and the bottom of the other end has an outer diameter measuring claw. An inner diameter measuring fixing claw is fixedly connected to the top of the other end of the main scale. By loosening or tightening the fixing screw, the sliding block can be moved using the spring-loaded return characteristic. The existing solution uses a movable claw to measure the inner diameter of a pipe, thus achieving the effect of measuring the inner diameter of the pipe. However, when measuring the inner diameter of a pipe with a socket, the fixed claw and movable claw can only contact the edge of the opening because the internal cross-section of the socket gradually narrows from the port inward. It cannot be measured further inward. In addition, the existing general measuring tool is a spiral micrometer, which rotates continuously during measurement, which is time-consuming and laborious, and the standard specifications are not flexible for actual production. Utility Model Content

[0004] The purpose of this invention is to provide a device for quickly measuring the inner diameter of pipe fittings. By setting a threaded connection structure of a first measuring rod, a supplementary rod, and a second measuring rod, the measuring length can be flexibly adjusted. The measuring ruler is driven to extend and retract by a transmission shaft and locked by the meshing of the toothed block and the toothed groove. This device can quickly and accurately measure the inner diameter of pipe fittings and effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A rapid measuring device for the inner diameter of pipe fittings includes a first measuring rod, a supplementary rod, and a second measuring rod. The upper end of the first measuring rod is fixedly connected to a first connector. The lower end of the supplementary rod has a threaded groove and is threadedly connected to the first connector. The upper end of the supplementary rod is fixedly connected to a second connector. The lower end of the second measuring rod has a connecting groove and is threadedly connected to either the second connector or the first connector. A first drive shaft is movably connected inside the first measuring rod and the supplementary rod, respectively. A second drive shaft is movably connected inside the second measuring rod. A measuring ruler is also inserted inside the second measuring rod, and the measuring ruler is sleeved on the outside of the second drive shaft.

[0007] As a further preferred embodiment of this utility model, multiple mounting sleeves are fixedly connected inside the first measuring rod, the supplementary rod, and the second measuring rod, and a shaft bracket is fixedly connected inside the mounting sleeve. The mounting sleeve is inserted into the first measuring rod, the supplementary rod, or the second measuring rod and then fixed by screws. The shaft bracket is used to provide mounting and rotational support for the first drive shaft or the second drive shaft.

[0008] As a further preferred embodiment of this utility model, a plurality of positioning slots are provided on the outer side of the first transmission shaft, and a plurality of positioning slots are also provided on the outer side of the second transmission shaft, and the positioning slots are rotatably connected to the corresponding shaft brackets.

[0009] As a further preferred embodiment of this utility model, a first connecting block is fixedly connected to the lower end of the first drive shaft. The first connecting block has a polygonal cross-section. A connecting groove matching the first connecting block is opened at the upper end of the first drive shaft. A second connecting block matching the connecting groove is fixedly connected to the lower end of the second drive shaft. The first connecting block and the second connecting block are respectively inserted into the corresponding connecting grooves. This structure is used to realize the rotation of the second drive shaft by multiple first drive shafts in series when multiple supplementary rods are set between the first measuring rod and the second measuring rod.

[0010] As a further preferred embodiment of this utility model, a lever is provided on the outer side of the first drive shaft and the second drive shaft respectively. A connecting block is fixedly connected to one side of the lever. The connecting block is fixedly connected to one side of the first drive shaft or the second drive shaft by screws. The side of the lever away from the connecting block extends to the outer side of the first measuring rod, the supplementary rod or the second measuring rod, so as to facilitate the first drive shaft to drive the second drive shaft from any position.

[0011] As a further preferred embodiment of this utility model, two toothed blocks are symmetrically fixedly connected to the outer side of the second transmission shaft.

[0012] As a further preferred embodiment of this utility model, a slide rail is provided inside the measuring scale, and toothed grooves are symmetrically provided on both sides of the slide rail. The shaft frame located inside the second measuring rod also passes through the slide rail. A compression spring is fitted on the outside of the second transmission shaft. The upper end of the compression spring abuts against the lower end of the measuring scale, and the lower end of the compression spring abuts against a lever block on the outside of the second transmission shaft, which is used to provide the pushing kinetic energy for the extension and retraction of the measuring scale. The toothed block is close to the toothed groove side through the second transmission shaft. After the second transmission shaft rotates, the two toothed blocks can engage with the corresponding toothed grooves respectively, thereby fixing the progress of the measuring scale and facilitating the removal of the reading of the entire device.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, a detachable supplementary rod is provided between the first and second measuring rods. The threaded connection enables flexible adjustment of the overall length of the measuring device, which can adapt to the inner diameter measurement needs of pipe fittings of different depths and specifications. At the same time, through the series transmission structure of the first and second transmission shafts, and with the help of the lever, the measuring ruler can be locked after measurement. This makes it easy to remove the entire device from the pipe fitting for reading when the measuring ruler cannot be viewed at eye level, effectively improving measurement efficiency and operational convenience. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the main structure of this utility model;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a cross-sectional view of the first measuring rod of this utility model;

[0019] Figure 5 This is a supplementary sectional view of the rod in this utility model;

[0020] Figure 6 This is a cross-sectional view of the second measuring rod of this utility model;

[0021] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0022] Figure 8 This is a schematic diagram of the disassembled structure of the second transmission shaft of this utility model;

[0023] Figure 9 This is a schematic diagram of the measuring ruler structure of this utility model;

[0024] Figure 10 This is a schematic diagram of the usage state of this utility model.

[0025] In the diagram: 1. First measuring rod; 2. Supplementary rod; 3. Second measuring rod; 4. Pulley; 5. First drive shaft; 6. Second drive shaft; 7. Measuring ruler; 8. Slide rail; 9. Gear groove; 10. First connector; 11. Threaded groove; 12. Second connector; 13. Connecting groove; 14. Mounting sleeve; 15. Shaft bracket; 16. First connecting block; 17. Connecting groove; 18. Positioning slot; 19. Second connecting block; 20. Gear block; 21. Compression spring; 22. Connecting block. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figures 1-10 As shown, the present invention provides a rapid measuring device for the inner diameter of pipe fittings, comprising a first measuring rod 1, a supplementary rod 2, and a second measuring rod 3. The upper end of the first measuring rod 1 is fixedly connected to a first connector 10. The lower end of the supplementary rod 2 is provided with a threaded groove 11 and threadedly connected to the first connector 10. The upper end of the supplementary rod 2 is fixedly connected to a second connector 12. The lower end of the second measuring rod 3 is provided with a connecting groove 13 and threadedly connected to either the second connector 12 or the first connector 10. The first measuring rod 1 and the supplementary rod 2 are respectively movably connected to a first drive shaft 5. The second measuring rod 3 is movably connected to a second drive shaft 6. A measuring ruler 7 is also inserted into the second measuring rod 3, and the measuring ruler 7 is also sleeved on the outside of the second drive shaft 6.

[0028] like Figures 2-7 As shown, multiple mounting sleeves 14 are fixedly connected inside the first measuring rod 1, the supplementary rod 2, and the second measuring rod 3, respectively. A shaft bracket 15 is fixedly connected inside the mounting sleeve 14. The mounting sleeve 14 is inserted into the first measuring rod 1, the supplementary rod 2, or the second measuring rod 3 and then fixed by screws. The shaft bracket 15 is used to provide mounting and rotation support for the first drive shaft 5 or the second drive shaft 6.

[0029] like Figures 2-8As shown, the first drive shaft 5 has multiple positioning slots 18 on its outer side, and the second drive shaft 6 also has multiple positioning slots 18 on its outer side. The positioning slots 18 are rotatably connected to the corresponding shaft brackets 15. A first connecting block 16 is fixedly connected to the lower end of the first drive shaft 5. The transverse cross-section of the first connecting block 16 is polygonal. A connecting groove 17 matching the first connecting block 16 is opened at the upper end of the first drive shaft 5. A second connecting block 19 matching the connecting groove 17 is fixedly connected to the lower end of the second drive shaft 6. The first connecting block 16 and the second connecting block 19 are respectively inserted into the corresponding connecting grooves 17. Do not insert into the corresponding connecting slot 17; this structure is used to realize the rotation of the second drive shaft 6 by multiple first drive shafts 5 in series when multiple supplementary rods 2 are set between the first measuring rod 1 and the second measuring rod 3. The outer sides of the first drive shaft 5 and the second drive shaft 6 are respectively provided with a lever 4. One side of the lever 4 is fixedly connected to a connecting block 22. The connecting block 22 is fixedly connected to one side of the first drive shaft 5 or the second drive shaft 6 by screws. The side of the lever 4 away from the connecting block 22 extends to the outer side of the first measuring rod 1, supplementary rod 2 or second measuring rod 3, so as to facilitate the first drive shaft 5 to drive the second drive shaft 6 from any position.

[0030] like Figures 6-9 As shown, two toothed blocks 20 are symmetrically fixedly connected to the outside of the second drive shaft 6. A slide rail 8 is provided inside the measuring scale 7, and toothed grooves 9 are symmetrically provided on both sides of the slide rail 8. The shaft bracket 15 located inside the second measuring rod 3 also passes through the slide rail 8. A compression spring 21 is fitted on the outside of the second drive shaft 6. The upper end of the compression spring 21 abuts against the lower end of the measuring scale 7, and the lower end of the compression spring 21 abuts against the lever 4 on the outside of the second drive shaft 6. This is used to provide the pushing kinetic energy for the extension and retraction of the measuring scale 7. The toothed blocks 20 are close to the toothed grooves 9 through the second drive shaft 6. After the second drive shaft 6 rotates, the two toothed blocks 20 can mesh with the corresponding toothed grooves 9 respectively, thereby fixing the progress of the measuring scale 7 and making it easier to take out the reading of the whole device.

[0031] It should be noted that this utility model is a quick measuring device for the inner diameter of pipe fittings. When using it, the operator should first adjust the overall length of the measuring device according to the actual depth of the pipe fitting being measured. During the adjustment process, the threaded connection is tightened or loosened by rotating the first measuring rod 1 or the supplementary rod 2, so that the supplementary rod 2 can be installed between the first measuring rod 1 and the second measuring rod 3, or it can be removed, in order to adapt to the measurement needs of different depths.

[0032] During measurement, the measuring ruler 7 is positioned inside the second measuring rod 3. Under the elastic force of the compression spring 21, the measuring ruler 7 maintains an outward extension tendency, with its end abutting against the inner side of the pipe socket. Then, the lower end of the first measuring rod 1 is also placed against the corresponding position inside the socket, causing the measuring ruler 7 to be compressed and retract into the second measuring rod 3, compressing the compression spring 21. After the measuring device is fully inserted into the measured position of the pipe fitting, to ensure the accuracy of the measurement results and prevent the measuring ruler 7 from moving during removal, the measuring ruler 7 contacts the inner wall of the pipe fitting and reaches the measuring position. After setting, the operator needs to push the corresponding lever 4 with one finger. When lever 4 rotates, it will drive the first drive shaft 5 or the second drive shaft 6 connected to it to rotate synchronously. When the second drive shaft 6 rotates, the two toothed blocks 20 fixedly connected to it will also rotate. As the toothed blocks 20 rotate, they will gradually approach the toothed grooves 9 on both sides of the inner slide 8 of the measuring scale 7, and eventually form a meshing connection with the toothed grooves 9. The meshing of the toothed blocks 20 and the toothed grooves 9 will firmly lock the measuring scale 7 in the current position, making it unable to move forward or backward. At this time, the operator will remove the entire measuring device from the pipe being measured. Since the measuring ruler 7 is locked by the meshing structure of the toothed block 20 and the toothed groove 9, the length of the measuring ruler 7 extending will not change during the removal process and will remain in the position during measurement. Finally, the operator can obtain the accurate size data of the inner diameter of the pipe fitting by observing the length of the measuring ruler 7 extending from the second measuring rod 3 (the length of the combined structure of the first measuring rod 1, the second measuring rod 3, or the first measuring rod 1, the supplementary rod 2, and the second measuring rod 3 should be added here) or by reading the scale marks on the measuring ruler 7.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for rapidly measuring the inner diameter of pipe fittings, characterized in that: The device includes a first measuring rod (1), a supplementary rod (2), and a second measuring rod (3). The upper end of the first measuring rod (1) is fixedly connected to a first connector (10). The lower end of the supplementary rod (2) is provided with a screw groove (11) and is threadedly connected to the first connector (10). The upper end of the supplementary rod (2) is fixedly connected to a second connector (12). The lower end of the second measuring rod (3) is provided with a connecting groove (13) and is threadedly connected to the second connector (12) or the first connector (10). The first measuring rod (1) and the supplementary rod (2) are respectively movably connected to a first drive shaft (5). The second measuring rod (3) is movably connected to a second drive shaft (6). The second measuring rod (3) is also inserted into a measuring ruler (7), and the measuring ruler (7) is also sleeved on the outside of the second drive shaft (6).

2. The rapid measuring device for the inner diameter of pipe fittings according to claim 1, characterized in that: Multiple mounting sleeves (14) are fixedly connected inside the first measuring rod (1), the supplementary rod (2) and the second measuring rod (3), and a shaft bracket (15) is fixedly connected inside the mounting sleeve (14).

3. The rapid measuring device for the inner diameter of pipe fittings according to claim 2, characterized in that: The first drive shaft (5) has multiple positioning slots (18) on its outer side, and the second drive shaft (6) also has multiple positioning slots (18) on its outer side, and the positioning slots (18) are rotatably connected to the corresponding shaft brackets (15).

4. The rapid measuring device for the inner diameter of pipe fittings according to claim 3, characterized in that: The first drive shaft (5) is fixedly connected to the lower end of the first connecting block (16). The cross-section of the first connecting block (16) is polygonal. The upper end of the first drive shaft (5) is provided with a connecting groove (17) that matches the first connecting block (16). The lower end of the second drive shaft (6) is fixedly connected to the second connecting block (19) that matches the connecting groove (17). The first connecting block (16) and the second connecting block (19) are respectively inserted into the corresponding connecting groove (17).

5. The rapid measuring device for the inner diameter of pipe fittings according to claim 1, characterized in that: The first drive shaft (5) and the second drive shaft (6) are respectively provided with a lever (4). A connecting block (22) is fixedly connected to one side of the lever (4). The connecting block (22) is fixedly connected to one side of the first drive shaft (5) or the second drive shaft (6) by screws. The side of the lever (4) away from the connecting block (22) extends to the outside of the first measuring rod (1), the supplementary rod (2) or the second measuring rod (3).

6. The rapid measuring device for the inner diameter of a pipe fitting according to claim 5, characterized in that: Two toothed blocks (20) are symmetrically fixedly connected to the outer side of the second drive shaft (6).

7. The rapid measuring device for the inner diameter of pipe fittings according to claim 6, characterized in that: The measuring ruler (7) has a slide (8) inside, and toothed grooves (9) are symmetrically opened on both sides of the slide (8). The shaft frame (15) located in the second measuring rod (3) also passes through the slide (8). A compression spring (21) is fitted on the outside of the second transmission shaft (6). The upper end of the compression spring (21) abuts against the lower end of the measuring ruler (7), and the lower end of the compression spring (21) abuts against the paddle (4) on the outside of the second transmission shaft (6). The toothed block (20) is close to the toothed groove (9) side through the second transmission shaft (6).

Images