Machine barrel inner diameter measuring instrument

Abstract

The utility model discloses a machine barrel inner diameter measuring instrument, which adopts the design of one groove and double mounting surfaces, namely two mounting inclined surfaces which are symmetrically arranged by taking the axis of a measuring main body as a central line are arranged in one mounting groove, so that two sensors with different angles can be assembled in one mounting groove, the structure of the measuring main body is simplified, and the measuring accuracy is improved. Meanwhile, measurement errors caused by asymmetric structures are reduced; secondly, through mutual attraction of the first magnetic attraction assembly and the second magnetic attraction assembly, it is ensured that the sensor fixing block is tightly attached to the installation slope, the magnetic attraction fixing mode is convenient to install, the sensor can be effectively prevented from loosening due to vibration or other external force in the measurement process, and therefore the measurement stability is ensured; furthermore, the first conductive terminal and the second conductive terminal correspond to each other in position and are connected with each other, so that stable and reliable electrical connection between the sensor and the circuit board is ensured, and the problem of signal transmission caused by poor contact or wire loosening in a traditional wire rod connection mode is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of measuring instrument for industrial production, concretely relates to a machine cylinder inner diameter measuring instrument. BACKGROUND

[0002] The double-screw extruder barrel is an important accessory of the extruder, and whether the extruder barrel is worn directly affects the service life of the extruder and the quality of the product. In order to maintain permanent productivity, it is necessary to detect the wear condition of the extruder production line in the early stage. At present, in order to accurately identify and locate the wear condition inside the extruder barrel, most of the barrel inner diameter measuring instruments are used, such as: Chinese patent application (application number: 201710153706.5), which can directly check the condition of the integrated barrel on the extruder production line, and does not need to disassemble the barrel one by one during measurement, and the inside impurities of the barrel do not need to be completely cleaned, so that the inner hole wear condition of the extruder can be quickly analyzed. However, the structure of such a measuring instrument is relatively complex, the symmetry accuracy of the four installation grooves on the measuring body is high, and the sensor is inconvenient to install, especially the sensor with a wire, which is easy to appear poor contact or wear in a complex environment. In addition, although the existing measuring instrument can meet the basic inner diameter measurement requirement, it is usually not suitable for measuring different hole diameters due to the difficulty in replacing sensors with different measurement ranges, and the application range is limited. SUMMARY

[0003] The problem to be solved by the utility model lies in providing a barrel inner diameter measuring instrument with simple structure, convenient sensor installation, removal and replacement, and high measurement accuracy.

[0004] In order to solve the above technical problems, the utility model provides a barrel inner diameter measuring instrument, which comprises a measuring body and a guide wheel set connected to the axial two ends of the measuring body, a circuit board is arranged in the measuring body, two installation grooves symmetrical about the axis of the measuring body are arranged on the measuring body, two installation inclined surfaces are arranged in the installation grooves, and the two installation inclined surfaces are symmetrically arranged with the axis of the measuring body as the center line; a sensor fixing block is arranged on the installation inclined surface, a sensor is installed on the sensor fixing block, a first magnetic attraction assembly and a first conductive terminal electrically connected with the circuit board are arranged on the installation inclined surface, a second magnetic attraction assembly and a second conductive terminal electrically connected with the sensor are arranged on the side where the sensor fixing block is attached to the installation inclined surface; the positions of the first magnetic attraction assembly and the second magnetic attraction assembly correspond to each other and attract each other, and the positions of the first conductive terminal and the second conductive terminal correspond to each other and are connected to each other.

[0005] As a preferred scheme of the utility model, the four sensors under the same radial section are arranged in an "X" shape.

[0006] As the preferred scheme of the utility model, four sensors constituting the "X" shape arrangement are provided with at least two groups along the axis of the measuring main body.

[0007] As the preferred scheme of the utility model, the first magnetic assembly includes at least two first magnets, the second magnetic assembly includes at least two second magnets, and the first magnet and the second magnet attract each other.

[0008] As the preferred scheme of the utility model, at least two first magnets are respectively arranged on both sides of the first conductive terminal, and at least two second magnets are respectively arranged on both sides of the second conductive terminal.

[0009] As the preferred scheme of the utility model, the installation inclined plane is provided with a threaded hole, the sensor fixing block is provided with a bolt hole, and the bolt is screwed through the bolt hole and the threaded hole to be connected in screw thread, so that the sensor fixing block is fixed on the installation inclined plane.

[0010] As the preferred scheme of the utility model, the installation inclined plane and the sensor fixing block are respectively provided with corresponding positioning holes, and the positioning pin is passed through the positioning holes of the sensor fixing block and the installation inclined plane to position the sensor fixing block on the installation inclined plane.

[0011] As the preferred scheme of the utility model, the outer side of the measuring main body is provided with a cover plate covering the installation groove and the sensor.

[0012] As the preferred scheme of the utility model, the cover plate and the measuring main body are fixed through bolts.

[0013] As the preferred scheme of the utility model, the outer side of the measuring main body is provided with an electricity connection socket.

[0014] The barrel inner diameter measuring instrument of the embodiment of the utility model has the following beneficial effects compared with the prior art:

[0015] The machine cylinder inner diameter measuring instrument adopts the design of one groove and double installation surfaces, that is, two installation inclined surfaces which are symmetrically arranged with the axis of the measuring body as the center line are arranged in one installation groove, so that two sensors with different angles can be assembled in one installation groove, the structure of the measuring body is simplified, the space utilization is improved, the overall volume of the measuring instrument is reduced, and the measurement error caused by the asymmetric structure is reduced; secondly, the first magnetic attraction assembly and the second magnetic attraction assembly are attracted to each other, so that the sensor fixing block is tightly attached to the installation inclined surface, the magnetic attraction fixing mode is not only convenient to install, but also can effectively prevent the sensor from loosening due to vibration or other external forces in the measurement process, so as to ensure the stability of measurement; in addition, the first conductive terminal and the second conductive terminal are positionally corresponding and connected with each other, so as to ensure that the electrical connection between the sensor and the circuit board is stable and reliable, and the signal transmission problem caused by poor contact or loose wire in the traditional wire connection mode is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0017] Fig. 1 is the explosion view of the machine cylinder inner diameter measuring instrument of the utility model embodiment;

[0018] Fig. 2 is the structural schematic view of the sensor fixing block and the measuring body when assembled;

[0019] Fig. 3 is the structural schematic view of the measuring body;

[0020] Fig. 4 is the structural schematic view of the sensor fixing block and the sensor.

[0021] Markings in the figure:

[0022] Measuring body 1;Guide wheel set 2;Installation groove 3;Installation inclined surface 4;First magnetic attraction assembly 41;First conductive terminal 42;Screw hole 43;Positioning hole 44;Sensor fixing block 5;Second magnetic attraction assembly 51;Second conductive terminal 52;Bolt hole 53;Positioning hole 54;Sensor 6;Cover plate 7;Electricity connection socket 8. DETAILED DESCRIPTION

[0023] The technical scheme in the utility model embodiment will be clearly and completely described below by combining with the drawings in the utility model embodiment, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] In the description of the utility model, it should be understood that, the utility model adopts the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the utility model indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0025] As Figs. 1 to 4 The preferred embodiment of the utility model.

[0026] A barrel inner diameter measuring instrument, it includes the measuring body 1 and the guide pulley group 2 that is connected to the axial both ends of measuring body 1, the circuit board (not indicated in the drawing) is equipped in the measuring body 1, two installation grooves 3 that are arranged symmetrically around the axis of the measuring body 1 are equipped on the measuring body 1, two installation inclined planes 4 are equipped in the installation groove 3, and the installation inclined plane 4 is arranged symmetrically with the axis of the measuring body 1 as the center line;Sensor fixing block 5 is equipped on the installation inclined plane 4, sensor 6 is installed on the sensor fixing block 5, first magnetic suction assembly 41 and first conductive terminal 42 that are electrically connected with the circuit board are equipped on the installation inclined plane 4, second magnetic suction assembly 51 and second conductive terminal 52 that are electrically connected with the sensor 6 are equipped on the side of the sensor fixing block 5 and the installation inclined plane 4 are pasted;The position of first magnetic suction assembly 41 and second magnetic suction assembly 51 corresponds and is attracted to each other, and the position of first conductive terminal 42 and second conductive terminal 52 corresponds and is connected to each other.

[0027] Therefore, the barrel inner diameter measuring instrument adopts the design of one groove and double installation surfaces, that is, two installation inclined surfaces 4 arranged symmetrically with the axis of the measuring body 1 as the center line are arranged in one installation groove 3, so that two angle-different sensors 6 can be assembled in one installation groove 3, the structure of the measuring body 1 is simplified, the space utilization is improved, the overall volume of the measuring instrument is reduced, and the measurement error caused by the asymmetric structure is reduced; secondly, the first magnetic attraction assembly 41 and the second magnetic attraction assembly 51 attract each other, so that the sensor fixing block 5 is tightly attached to the installation inclined surface 4, the magnetic attraction fixing mode is not only convenient to install, but also can effectively prevent the sensor 6 from loosening due to vibration or other external force in the measurement process, so as to ensure the stability of the measurement; in addition, the first conductive terminal 42 and the second conductive terminal 52 are positionally corresponding and connected with each other, so as to ensure that the electrical connection between the sensor 6 and the circuit board is stable and reliable, so as to avoid the signal transmission problem caused by poor contact or loose wire in the traditional wire connection mode.

[0028] Exemplarily, the four sensors 6 under the same radial section are arranged in an "X" shape, and the layout mode ensures the uniform distribution of the sensors 6 in space, can simultaneously collect data from multiple angles, and improves the measurement accuracy.

[0029] Exemplarily, the four sensors 6 constituting the "X" arrangement are arranged in at least two groups along the axis of the measuring body 1, so that the measuring instrument can simultaneously capture the changes of the barrel inner diameter in the radial direction and the axial direction, further improves the performance and function of the measuring instrument, and makes it can more comprehensively and accurately measure the size and shape changes of the barrel inner diameter.

[0030] Exemplarily, the first magnetic attraction assembly 41 includes at least two first magnets, the second magnetic attraction assembly 51 includes at least two second magnets, and the first magnets and the second magnets attract each other. The multi-magnet design increases the strength and uniformity of the magnetic attraction force, and ensures the close attachment between the sensor fixing block 5 and the installation inclined surface 4.

[0031] Exemplarily, at least two first magnets are arranged on both sides of the first conductive terminal 42; and at least two second magnets are arranged on both sides of the second conductive terminal 52. This layout provides stable mechanical support for the connection between the conductive terminals, so that the connection between the conductive terminals always remains stable during installation and use, reduces the signal transmission problem caused by mechanical loosening, and further improves the integrity and accuracy of the measurement signal.

[0032] Exemplarily, in order to further improve the fixing strength of the sensor fixing block 5, the mounting slope 4 is provided with a threaded hole 43, the sensor fixing block 5 is provided with a bolt hole 53, and a bolt is screwed through the bolt hole 53 and the threaded hole 43, so that the sensor fixing block 5 is fixed on the mounting slope 4.

[0033] Exemplarily, in order to further improve the mounting precision of the sensor fixing block 5, the mounting slope 4 and the sensor fixing block 5 are respectively provided with corresponding positioning holes 44, 54, and a positioning pin is passed through the positioning holes 54, 44 of the sensor fixing block 5 and the mounting slope 4, so that the sensor fixing block 5 is positioned on the mounting slope 4.

[0034] Exemplarily, the outer side of the measuring body 1 is provided with a cover plate 7 covering the mounting groove 3 and the sensor 6, which can effectively prevent the sensor 6 from being affected by external environment such as dust, liquid, corrosive gas, etc. In the embodiment, the cover plate and the measuring body 1 are fixed by bolts, so as to be disassembled and maintained.

[0035] Exemplarily, the outer side of the measuring body 1 is provided with an electrical connection socket 8 to facilitate external power supply or host.

[0036] In the description of the present application, it should be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" used in the present application should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The above disclosure is only the preferred embodiment of the present application, and of course cannot limit the scope of the present application, therefore, the equivalent changes made according to the patent application scope of the present application still belong to the scope covered by the present application.

Claims

1. A barrel inner diameter measuring instrument, comprising a measuring body and guide wheel assembly connected to both axial ends of the measuring body, wherein a circuit board is provided inside the measuring body, characterized in that: The measuring body has two mounting slots symmetrically arranged around its axis. Each mounting slot contains two mounting ramps, which are symmetrically arranged with the axis of the measuring body as their center line. A sensor mounting block is provided on each mounting ramp, and a sensor is mounted on the mounting block. The mounting ramp also has a first magnetic attraction component and a first conductive terminal electrically connected to the circuit board. On the side of the sensor mounting block that contacts the mounting ramp, a second magnetic attraction component and a second conductive terminal electrically connected to the sensor are provided. The first and second magnetic attraction components are positioned correspondingly and attract each other, and the first and second conductive terminals are positioned correspondingly and connected to each other.

2. The barrel inner diameter measuring instrument as described in claim 1, characterized in that: The four sensors in the same radial section are arranged in an "X" shape.

3. The barrel inner diameter measuring instrument as described in claim 2, characterized in that: The four sensors arranged in an "X" shape are arranged in at least two groups at intervals along the axis of the measuring body.

4. The barrel inner diameter measuring instrument as described in claim 1, characterized in that: The first magnetic attraction component includes at least two first magnets, and the second magnetic attraction component includes at least two second magnets, wherein the first magnets and the second magnets are attracted to each other by opposite poles.

5. The barrel inner diameter measuring instrument as described in claim 4, characterized in that: At least two of the first magnets are respectively disposed on both sides of the first conductive terminal; at least two of the second magnets are respectively disposed on both sides of the second conductive terminal.

6. The barrel inner diameter measuring instrument as described in claim 1, characterized in that: The mounting slope is provided with threaded holes, and the sensor fixing block is provided with bolt holes. Bolts are passed through the bolt holes and threadedly connected to the threaded holes, so that the sensor fixing block is fixed on the mounting slope.

7. The barrel inner diameter measuring instrument as described in claim 1, characterized in that: The mounting slope and the sensor fixing block are respectively provided with corresponding positioning holes. A positioning pin is used to pass through the positioning holes of the sensor fixing block and the mounting slope to position the sensor fixing block on the mounting slope.

8. The barrel inner diameter measuring instrument as described in claim 1, characterized in that: The outer side of the measuring body is provided with a cover plate that covers the mounting groove and the sensor.

9. The barrel inner diameter measuring instrument as described in claim 8, characterized in that: The cover plate is fixed to the measuring body by bolts.

10. The barrel inner diameter measuring instrument as described in claim 1, characterized in that: The measuring body has a power socket on its outer side.

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