Measuring instrument for measuring internal and external diameters

Abstract

The utility model discloses a measuring instrument for measuring internal and external diameters. The measuring instrument comprises a screw rod; the first end of the screw rod is connected with a first measuring head; the second end of the screw rod is detachably connected with a second measuring head, and a first measuring range can be measured between the first measuring head and the second measuring head; the support comprises a first supporting arm, a second supporting arm and a connecting part, the first supporting arm is connected with the first end of the connecting part, the second supporting arm is connected with the second end of the connecting part, and the first supporting arm and the second supporting arm are oppositely arranged; the first support arm is detachably connected with a third measuring head, and the third measuring head is arranged towards the direction of the second support arm; when the second measuring head is separated from the second end of the screw rod, the second end of the screw rod can be detachably connected with the second support arm, and a second measuring range can be measured between the first measuring head and the third measuring head. According to the structure of the utility model, through the detachable combination of the support and the screw rod, the same measuring instrument can measure the inner diameter and the outer diameter at the same time.

Description

Technical Field

[0001] The utility model relates to a measuring device, in particular to a measuring instrument used for measuring inner and outer diameters. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] In industrial applications, accurate measurement of tubular structures is essential to ensure the normal operation of the system. Tubular structures are usually used to transport gases, liquids or fluids with solid particles, or they may be used to support mechanical structures. They need to be provided with a lumen column with a specified wall thickness. Therefore, their inner and outer diameter dimensions must meet strict specifications. Traditionally, due to the geometric shape of the tubular structure, the instrument needs to be inserted when measuring the inner diameter and the instrument needs to be covered when measuring the outer diameter. Therefore, the inner and outer diameter measurements of tubular structures are often completed by two different measuring instruments. This not only increases the workload, but also increases the cost.

[0004] There are other measuring instruments that can be disassembled and reassembled to achieve the transition between inner diameter measurement and outer diameter measurement. However, the process of shape transition is complicated, and not only the cost is still high, but also it is not easy to operate, which affects the accuracy of measurement and is difficult to meet the needs.

[0005] Therefore, there is an urgent need to develop a new measuring device that can quickly and accurately measure the inner and outer diameters of tubular structures at the same time. Such a device will simplify the measurement process, improve production efficiency, and reduce the cost and resource waste caused by measurement errors.

[0006] Currently, there is no measuring instrument for measuring inner and outer diameters that can solve the above problems. Utility Model Content

[0007] The utility model aims to provide a measuring instrument for measuring inner and outer diameters, which can realize the measurement of inner and outer diameters by the same measuring instrument through the detachable combination of a bracket and a spiral rod.

[0008] In order to achieve the above-mentioned object, the utility model discloses the following measuring instrument for measuring inner and outer diameters, wherein the measuring instrument for measuring inner and outer diameters comprises:

[0009] A screw rod, the screw rod can be extended and retracted by rotation; a first end of the screw rod is connected to a first probe; a second end of the screw rod is detachably connected to a second probe, so that when the screw rod is extended and retracted by rotation, a first range can be measured between the first probe and the second probe;

[0010] A bracket, the bracket comprising a first arm, a second arm and a connecting portion, the first arm being connected to a first end of the connecting portion, the second arm being connected to a second end of the connecting portion, and the first arm and the second arm being arranged opposite to each other; the first arm being detachably connected to a third probe, and the third probe being arranged toward the direction of the second arm;

[0011] Among them, when the second measuring head is separated from the second end of the spiral rod, the second end of the spiral rod can be detachably connected to the second arm, so that when the spiral rod is extended and retracted by rotation, a second range can be measured between the first measuring head and the third measuring head.

[0012] Furthermore, the spiral rod comprises a rotating portion and a rod portion, and the rotating portion and the rod portion are threadedly connected, so that the distance between the rotating portion and the rod portion can be shortened or moved away by rotation.

[0013] Furthermore, a first scale is printed on the annular wall of the outer periphery of the rotating part, and each time the rotating part rotates one circle, the distance moved by the first probe in the direction from the second probe to the third probe is exactly the maximum range of the first scale.

[0014] Furthermore, a second scale is printed on the rod along the direction from the first probe to the second probe; after the second probe is connected to the second end of the spiral rod, when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the second probe is minimized, the distance between the first probe and the second probe is the minimum range value of the second scale; when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the second probe is maximized, the distance between the first probe and the second probe is the maximum range value of the second scale.

[0015] Furthermore, the rod portion is printed with a third scale along the direction from the first probe to the third probe; after the second end of the spiral rod is connected to the second arm, when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the third probe is minimized, the distance between the first probe and the third probe is the minimum range value of the third scale; when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the third probe is maximized, the distance between the first probe and the third probe is the maximum range value of the third scale.

[0016] Furthermore, it also includes an electronic range meter, which is detachably connected to the second end of the spiral rod, and the electronic range meter can be detachably connected to the second probe or the second arm. When the electronic range meter is connected to the second probe, the electronic range meter displays the current information of the second scale; when the electronic range meter is connected to the second arm, the electronic range meter displays the current information of the third scale.

[0017] Further, the rotating portion is arranged at a first end of the spiral rod, and the rod portion is arranged at a second end of the spiral rod.

[0018] Furthermore, the third probes are provided with a plurality of different lengths, so that the second scale includes a plurality of maximum range values.

[0019] Furthermore, the bracket is configured to be U-shaped.

[0020] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0021] The measuring instrument for measuring inner and outer diameters of the utility model can be detachably combined with a bracket and a spiral rod. When the inner diameter needs to be measured, the spiral rod is connected with a second probe in a default state, and the distance between the first probe and the second probe is the inner diameter. When the outer diameter needs to be measured, the second probe can be detached and the spiral rod can be installed on the bracket, and the other end of the bracket is provided with a third probe, and the distance between the first probe and the third probe is the outer diameter. The whole process only requires detaching the detachable probe, which is indirect and easy to use, and does not lose any measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a schematic diagram of the outer diameter measuring state of a measuring instrument for measuring inner and outer diameters provided in an embodiment of this specification;

[0024] Figure 2 This is a schematic diagram of the inner diameter measuring state of a measuring instrument for measuring inner and outer diameters provided in an embodiment of this specification;

[0025] Figure 3 It is a schematic diagram of the use of an electronic range meter of a measuring instrument for measuring inner and outer diameters provided in an embodiment of this specification;

[0026] In the figure: 1, screw rod; 11, rotating part; 12, rod part; 2, bracket; 21, first arm; 22, second arm; 23, connecting part; 3, electronic range meter; 41, first probe; 42, second probe; 43, third probe. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0029] See also Figure 1-2 , is a measuring instrument for measuring inner and outer diameters of this embodiment, comprising:

[0030] A screw rod 1, which can be extended and retracted by rotating; a first end of the screw rod 1 is connected to a first probe 41; a second end of the screw rod 1 is detachably connected to a second probe 42, so that when the screw rod 1 is extended and retracted by rotating, a first range can be measured between the first probe 41 and the second probe 42;

[0031] The bracket 2 includes a first arm 21, a second arm 22 and a connecting portion 23, wherein the first arm 21 is connected to a first end of the connecting portion 23, the second arm 22 is connected to a second end of the connecting portion 23, and the first arm 21 and the second arm 22 are arranged opposite to each other; the first arm 21 is detachably connected to a third probe 43, and the third probe 43 is arranged toward the direction of the second arm 22;

[0032] Among them, when the second probe 42 is separated from the second end of the screw rod 1, the second end of the screw rod 1 can be detachably connected to the second arm 42, so that when the screw rod 1 is extended and retracted by rotation, the second range can be measured between the first probe 41 and the third probe 43.

[0033] Through the above structure, when in use, if the operator needs to measure the inner diameter of the tubular structure, he only needs to install the second probe 42 that meets the range requirement on the second end of the spiral rod 1, and then put the spiral rod 1 installed with the second probe 42 into the interior of the tubular structure. The operator adjusts the spiral rod 1, and the length of the spiral rod 1 changes until the first probe 41 and the second probe 42 at both ends of the spiral rod 1 respectively contact the two nodes of the inner wall of the tubular structure to be measured, and then the reading can be taken. At this time, the first range is obtained, which is the inner diameter of the tubular structure. If the operator needs to measure the outer diameter of the tubular structure, the second probe 42 originally fixed on the second end of the spiral rod 1 needs to be disassembled, and then the second end of the spiral rod 1 is installed on the second arm 22 of the bracket 2, and at the same time, the third probe 43 that meets the range requirement is installed at the first arm 21 of the bracket 2. After installation, the outer diameter is measured. First, the tubular structure is inserted into the internal area of ​​the bracket 2 between the first probe 41 and the third probe 43. Then the operator adjusts the screw rod 1, and the length of the screw rod 1 changes until the first probe 41 and the third probe 43 at both ends of the screw rod 1 respectively contact the two nodes of the outer wall of the tubular structure to be measured. Then the reading can be taken. At this time, the second range is obtained, which is the outer diameter of the tubular structure.

[0034] In the above process, when the operator needs to switch between the first range and the second range, the operator only needs to remove or reinstall the second probe 42 to the second end of the screw rod 1, and remove or install the second end of the screw rod 1 from the second arm 22, so as to quickly and efficiently complete the switch between the two states. It is worth noting that the second probe 42 and the third probe 43 are both detachable and installable component combinations, that is, the approximate range of the range can be judged according to the actual size of the tubular structure, so that when installing, the prefabricated second probe 42 or third probe 43 with a relatively suitable range can be selected. The process of the bracket 2 is simple and easy to produce, and the cost is low, but it still maintains a high degree of accuracy. In this embodiment, the repeatability of the measurement result of the second range is ≤0.002mm, and according to the difference of the actual mold, the accuracy of the measurement result of the second range is ≤0.005mm, which fully meets the accuracy requirements for measuring the tubular structure.

[0035] Furthermore, the first arm 21 and the second arm 22 are configured as arm-shaped structures protruding according to the position of the connection portion 23, so that the bracket 1 is configured as a U-shaped structure, and the height of the protrusion of the first arm 21 and the second arm 22 is high enough so that the screw rod 1 can be installed on the side of the second arm 22 without hindrance. At the same time, the height of the protrusion of the first arm 21 and the second arm 22 is the same, so that the first probe 41 and the corresponding third probe 43 of the screw rod 1 after being installed on the second arm 22 are on the same axis, so that the measuring instrument for measuring the inner and outer diameters of the utility model has a more precise accuracy.

[0036] Furthermore, if Figure 2 As shown, the screw rod 1 includes a rotating portion 11 and a rod portion 12, and the rotating portion 11 and the rod portion 12 are threadedly connected, so that the distance between the rotating portion 11 and the rod portion 12 can be shortened or moved away by rotation. Specifically, the connection between the rod portion 12 and the rotating portion 11 is connected by a high-precision calibrated internal thread combination, and during production, the pitch of the thread matches the actual range scale, so that when the first scale is printed on the annular wall of the outer periphery of the rotating portion 11, each time the rotating portion 11 rotates one circle, the distance moved in the direction from the first probe 41 to the second probe 42 or the third probe 43 is just the maximum range of the first scale, so that the operator can judge the degree of telescopic change of the screw rod 1 by the change in the size of the first scale on the rotating portion 11 after the rotating portion 11 is rotated.

[0037] Further, the rod 12 is printed with a second scale along the direction from the first probe 41 to the second probe 42; after the second probe 42 is connected to the second end of the spiral rod 1, when the spiral rod 1 is extended and retracted by rotation so that the distance between the first probe 41 and the second probe 42 is the smallest, the distance between the first probe 41 and the second probe 42 is the minimum range value of the second scale; when the spiral rod 1 is extended and retracted by rotation so that the distance between the first probe 41 and the second probe 42 is the largest, the distance between the first probe 41 and the second probe 42 is the maximum range value of the second scale. Specifically, before measuring the inner diameter of the tubular structure, the operator first rotates the spiral rod 1 to the shortest, at which time the second scale points to the minimum inner diameter, and then puts the measuring instrument of this embodiment into the tubular structure, and gradually rotates the spiral rod 1 to the maximum extendable length, at which time the distance between the first probe 41 and the second probe 42 is the inner diameter length. In other words, the longer the spiral rod 1 rotates, the larger the inner diameter represented by the second scale.

[0038] Furthermore, the rod 12 is printed with a third scale along the direction from the first probe 41 to the third probe 43; after the second end of the spiral rod 1 is connected to the second arm 22, when the spiral rod 1 is extended and retracted by rotation so that the distance between the first probe 41 and the third probe 43 is the minimum range value of the third scale; when the spiral rod 1 is extended and retracted by rotation so that the distance between the first probe 41 and the third probe 43 is the maximum range value of the third scale. Specifically, before measuring the outer diameter of the tubular structure, the operator first rotates the spiral rod 1 to the shortest, at which time the third scale points to the minimum inner diameter, and then after the tubular structure is extended between the first probe 41 and the third probe 43, the spiral rod 1 is gradually rotated to the maximum extendable length, at which time the distance between the first probe 41 and the third probe 43 is the outer diameter length. In other words, the longer the spiral rod 1 is rotated, the larger the outer diameter represented by the third scale.

[0039] It is worth noting that the second scale and the third scale mentioned above exist simultaneously to facilitate the measurement of the inner diameter and the outer diameter at the same time, and the second scale and the third scale can share the same scale line to facilitate reading.

[0040] Furthermore, if Figure 3 As shown, the electronic range meter 3 is also included, and the electronic range meter 3 is detachably connected to the second end of the spiral rod 1, and the electronic range meter 3 can be detachably connected to the second probe 42 or the second arm 43. When the electronic range meter 3 is connected to the second probe 42, the electronic range meter 3 displays the current second scale information; when the electronic range meter 3 is connected to the second arm 22, the electronic range meter 3 displays the current third scale information. Through the setting of the electronic range meter 3, compared with directly reading the scale line, the convenience of the degree can be effectively improved, and the detachable connection setting of the electronic range meter 3 has little effect on the method of use.

[0041] Furthermore, if Figure 2 As shown, the rotating part 11 is arranged at the first end of the spiral rod 1, and the rod part 12 is arranged at the second end of the spiral rod 1. The above arrangement can keep the rod part 12 with one end of the scale line from rotating, so as to facilitate reading. Specifically, the outer periphery of the rotating part 11 and the rod part 12 includes regular lines with a certain depth, so as to enhance the friction between the rotating part 11 and the rod part 12 and the operator's hand.

[0042] Furthermore, a plurality of third probes 43 of different lengths are included so that the second scale includes a plurality of maximum range values. Considering the detachable connection design between the third probe 43 and the bracket 2, a larger measurement adaptation range can be easily achieved by replacing the third probes 43 of different lengths.

[0043] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described in the industry standards or embodiments, etc. Some industry standards or slightly modified implementation plans based on the implementation of the custom methods or embodiments can also achieve the same, equivalent or similar, or predictable implementation effects after deformation of the above embodiments. The embodiments of data acquisition, processing, output, judgment methods, etc. after these modifications or deformations can still fall within the scope of the optional implementation plans of this application.

[0044] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and changes to the present application without departing from the spirit of the present application. It is intended that the attached embodiments include these modifications and changes without departing from the present application.

Claims

1. A measuring instrument for measuring inner and outer diameters, characterized in that: The measuring instrument for measuring the inner and outer diameters comprises: A screw rod, the screw rod can be extended and retracted by rotation; a first end of the screw rod is connected to a first probe; a second end of the screw rod is detachably connected to a second probe, so that when the screw rod is extended and retracted by rotation, a first range can be measured between the first probe and the second probe; A bracket, the bracket comprising a first arm, a second arm and a connecting portion, the first arm being connected to a first end of the connecting portion, the second arm being connected to a second end of the connecting portion, and the first arm and the second arm being arranged opposite to each other; the first arm being detachably connected to a third probe, and the third probe being arranged toward the direction of the second arm; Among them, when the second measuring head is separated from the second end of the spiral rod, the second end of the spiral rod can be detachably connected to the second arm, so that when the spiral rod is extended and retracted by rotation, a second range can be measured between the first measuring head and the third measuring head.

2. The measuring instrument for measuring inner and outer diameters according to claim 1, characterized in that: The spiral rod comprises a rotating portion and a rod portion, wherein the rotating portion and the rod portion are threadedly connected, so that the rotating portion can be rotated to shorten or move away from the rod portion.

3. The measuring instrument for measuring inner and outer diameters according to claim 2, characterized in that: A first scale is printed on the annular wall of the outer periphery of the rotating part. Whenever the rotating part rotates one circle, the distance moved by the first probe in the direction from the second probe to the third probe is just the maximum range of the first scale.

4. The measuring instrument for measuring inner and outer diameters according to claim 3, characterized in that: A second scale is printed on the rod along the direction from the first probe to the second probe; after the second probe is connected to the second end of the spiral rod, when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the second probe is minimized, the distance between the first probe and the second probe is the minimum range value of the second scale; when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the second probe is maximized, the distance between the first probe and the second probe is the maximum range value of the second scale.

5. The measuring instrument for measuring inner and outer diameters according to claim 4, characterized in that: A third scale is printed on the rod along the direction from the first probe to the third probe; after the second end of the spiral rod is connected to the second arm, when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the third probe is minimized, the distance between the first probe and the third probe is the minimum range value of the third scale; when the spiral rod is extended and retracted by rotation so that the distance between the first probe and the third probe is maximized, the distance between the first probe and the third probe is the maximum range value of the third scale.

6. The measuring instrument for measuring inner and outer diameters according to claim 5, characterized in that: It also includes an electronic range meter, which is detachably connected to the second end of the spiral rod, and the electronic range meter can be detachably connected to the second probe or the second support arm. When the electronic range meter is connected to the second probe, the electronic range meter displays the current information of the second scale; when the electronic range meter is connected to the second arm, the electronic range meter displays the current information of the third scale.

7. The measuring instrument for measuring inner and outer diameters according to claim 2, characterized in that: The rotating portion is disposed at a first end of the spiral rod, and the rod portion is disposed at a second end of the spiral rod.

8. The measuring instrument for measuring inner and outer diameters according to claim 4, characterized in that: The third probe comprises a plurality of different lengths, so that the second scale comprises a plurality of maximum range values.

9. The measuring instrument for measuring inner and outer diameters according to claim 1, characterized in that: The bracket is configured in a U shape.

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