Particle strength testing system

Abstract

The utility model discloses a particle strength testing system, which belongs to the technical field of strength testing and is designed for solving the problems of high fault risk and the like caused by many connecting parts of the existing testing device. The utility model discloses a particle strength testing system, which comprises a feeding turntable, a feeding device and a testing device, wherein the feeding turntable is used for accommodating a to-be-tested material; the pressure sensor is positioned above the feeding turntable; the vertical ejector rod is used for directly or indirectly abutting the to-be-tested material against the pressure sensor; the servo motor is connected to the vertical ejector rod and used for driving the vertical ejector rod to move in the axis direction of the vertical ejector rod. The particle strength testing system disclosed by the utility model is more accurate in positioning of the vertical ejector rod, and ensures that the vertical ejector rod can accurately move to a target position. The connecting structure between the servo motor and the vertical ejector rod is simpler, the probability of damage of a transition connecting piece is low, the problems that an existing stepping motor driving structure is high in fault risk and the like are solved, and the use experience is better.

Description

Technical Field

[0001] The utility model relates to the technical field of strength testing, in particular to a particle strength testing system. Background Art

[0002] Particle strength refers to the maximum pressure that a granular object can withstand before breaking. The main method to measure this parameter is to apply pressure to the granular object and continuously measure the pressure value. The pressure value measured when the granular object breaks is the particle strength. There are two main criteria for judging the breakage of granular objects. The first is that the weight or volume of the granular object drops to the reference value. For example, when the size of the granular object is reduced to 1 / 10 of the original size, it can be considered to have been broken. The second is that the pressure value measured under continuous pressure begins to drop, at which time it can also be judged that the granular object is broken.

[0003] The commonly used particle strength measurement device currently includes a pressure sensor, a material tray and a push rod. The granular object to be measured is placed in the material tray. The push rod moves upward to push the granular object to be measured to abut against the pressure sensor. After abutment, the push rod continues to apply force, so that the granular object to be measured is strongly squeezed between the push rod and the pressure sensor until the granular object to be measured is crushed. In the above process, the pressure sensor continuously measures the pressure value on the granular object to be measured, and the pressure value that causes the granular object to be measured to be crushed is recorded as the particle strength value.

[0004] The defects of existing particle strength measuring devices include: using a stepper motor to drive the push rod to move, there are many connecting parts, the control accuracy of the travel distance is low, frequent calibration is required, and the risk of failure is high; mechanical magnetic induction positioning is used, there is no self-checking function, and the failure rate is high. Utility Model Content

[0005] The utility model aims to provide a particle strength testing system, which solves the problem of high failure risk caused by multiple connecting components in existing testing devices and provides a better user experience.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The particle strength testing system includes: a feed turntable for accommodating a material to be tested; a pressure sensor located above the feed turntable; a vertical push rod for directly or indirectly abutting the material to be tested against the pressure sensor; and a servo motor connected to the vertical push rod, wherein the servo motor is used to drive the vertical push rod to move along its axial direction.

[0008] In one of the preferred embodiments, a plurality of limiting pits are provided on the feed turntable, and / or a limiting pit is provided on the top end of the vertical push rod, and each of the limiting pits can accommodate one of the materials to be tested.

[0009] In one of the preferred embodiments, the particle strength testing system further includes a connected cleaning brush and a cleaning brush motor, wherein the cleaning brush is used to clean the residues in the limiting pit.

[0010] In one of the preferred embodiments, the particle strength testing system further comprises a baffle, and the baffle is arranged on a side of the cleaning brush.

[0011] In one of the preferred embodiments, the particle strength testing system further comprises an electronic positioning device, and the electronic positioning device is used to determine the rotation angle of the feeding turntable.

[0012] In one of the preferred embodiments, the particle strength testing system further comprises a vibration device, and the vibration device is connected to the feeding turntable.

[0013] In one preferred embodiment, the vibration device is an electromagnetic oscillator, and the electromagnetic oscillator is arranged on the bottom surface of the feeding turntable.

[0014] In one of the preferred embodiments, the particle strength testing system further comprises a material tray rotating motor, and the material tray rotating motor is connected to the feed turntable.

[0015] In one of the preferred embodiments, the particle strength testing system further comprises a waste collection pipe and a waste collection bucket, wherein the inlet end of the waste collection pipe is connected to the residue collection tray, and the outlet end of the waste collection pipe faces the waste collection bucket.

[0016] In one of the preferred embodiments, the particle strength testing system also includes a data transmission interface.

[0017] The particle strength testing system disclosed in the utility model includes a servo motor connected to a vertical push rod, and the servo motor is used to drive the vertical push rod to move along its axis direction, so as to position the vertical push rod more accurately and ensure that the vertical push rod can accurately move to the target position. The connection structure between the servo motor and the vertical push rod is simpler, and the probability of damage to the transition connection is low, which solves the problems of high risk of failure of the existing stepper motor drive structure and provides a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a particle strength testing system provided by a specific embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a particle strength testing system after the shell is removed provided by a specific embodiment of the utility model;

[0020] Figure 3It is a side view of the particle strength testing system after the shell is removed provided by a specific embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of an electromagnetic oscillator provided by a specific implementation method of the utility model.

[0022] In the figure:

[0023] 1. Feed turntable; 2. Pressure sensor; 3. Vertical push rod; 4. Servo motor; 5. Limiting pit; 7. Feed tray rotation motor; 8. Housing; 11. Center shaft; 61. Cleaning brush; 62. Cleaning brush motor; 63. Baffle; 64. Waste collection pipe; 65. Waste collection bucket; 66. Residue collection tray; 67. Through hole; 91. Electromagnet; 92. Electromagnet core. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementation methods disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] This embodiment discloses a particle strength testing system for measuring the particle strength of materials such as carbon black particles, and is particularly suitable for testing the strength of single particles. Figures 1 to 3 As shown, the particle strength testing system includes a feeding turntable 1, a pressure sensor 2, a vertical push rod 3, a servo motor 4 and a power supply module (not shown), wherein the vertical push rod 3, the servo motor 4 and the power supply module and other structures are all arranged in a housing 8, which is safer to use.

[0031] The feed turntable 1 is used to accommodate the material to be tested. The pressure sensor 2 is located above the feed turntable 1. The material to be tested can abut against the pressure sensor 2 when it moves up. The pressure sensor 2 can measure the pressure value on the material to be tested. The specific structure of the pressure sensor 2 is not limited. In this embodiment, a high-precision pressure sensor 2 with a pressure test accuracy of 0.2% is used, which has a wider range of applications and more accurate test results. In order to prevent the material to be tested from accidentally moving when it is under pressure, a groove-shaped limiter (not shown) can be provided on the bottom surface of the pressure sensor 2. When the material to be tested abuts against the pressure sensor 2, the top of the material to be tested is stuck in the limiter, and the edge of the limiter can prevent the material to be tested from moving laterally, without the need for frequent calibration.

[0032] The vertical push rod 3 can directly push up the material to be tested, so that the material to be tested abuts against the pressure sensor 2. The thrust of the vertical push rod 3 can fully act on the material to be tested, reducing energy waste. The vertical push rod 3 can also push up the feed turntable 1, and the material to be tested moves up synchronously with the feed turntable 1, that is, the vertical push rod 3 can indirectly make the material to be tested abut against the pressure sensor 2. The structure of the feed turntable 1 is simpler and more convenient to use.

[0033] The servo motor 4 is connected to the vertical push rod 3, and the vertical push rod 3 can move along its axis under the drive of the servo motor 4. The servo motor 4 is equipped with a feedback device, which can monitor the current position of the vertical push rod 3 in real time and determine how much distance it needs to continue to move according to the current position, so as to position the vertical push rod 3 more accurately and ensure that the vertical push rod 3 can accurately move to the target position. The connection structure between the servo motor 4 and the vertical push rod 3 is simpler, and the small number of transition connectors means that the probability of damage is low, which solves the problem of high risk of failure of the existing stepper motor drive structure.

[0034] The method of using the particle strength test system is as follows: the material to be tested (e.g., a carbon black particle) is placed on the feed turntable 1, and the servo motor 4 drives the vertical push rod 3 to drive the feed turntable 1 to move vertically upward, so that the material to be tested contacts the pressure sensor 2 until it breaks. The pressure sensor 2 records the pressure change value of the material to be tested during the breaking process, and the pressure change value is output through the data transmission interface, realizing the automatic test of the material strength, with high test efficiency and higher test data accuracy.

[0035] In order to make the material to be tested more stable, it is necessary to set a limiting pit 5 to fix the granular material to be tested. The specific setting position of the limiting pit 5 is not limited. Multiple limiting pits 5 can be set on the feeding turntable 1, or a limiting pit 5 can be set at the top of the vertical push rod 3. Each limiting pit 5 can accommodate one material to be tested. It is also possible to set the limiting pit 5 on the feeding turntable 1 and the top of the vertical push rod 3 at the same time. In this structure, the limiting pit 5 on the feeding turntable 1 is a through hole, and the limiting pit 5 at the top of the vertical push rod 3 is an inner concave structure (blind hole).

[0036] After the material to be tested is squeezed and crushed, residues will be formed in the limiting pit 5. In order not to affect subsequent tests, the particle strength test system also includes a connected cleaning brush 61 and a cleaning brush motor 62. The cleaning brush motor 62 can drive the cleaning brush 61 to rotate around the axis of the motor shaft, and the cleaning brush 61 can sweep the residues away from the limiting pit 5 during the rotation process.

[0037] Taking the limiting pit 5 set at the top of the vertical push rod 3 as an example, when in use, the servo motor 4 drives the vertical push rod 3 to move from bottom to top, and the vertical push rod 3 passes through the through hole on the feed turntable 1 and lifts up a particle of suitable size (i.e., the material to be tested). The material to be tested moves up synchronously with the vertical push rod 3 until it abuts against the pressure sensor 2. The servo motor 4 continues to apply force to the vertical push rod 3, and the pressure on the material to be tested continues to increase until the material to be tested breaks and the test is completed. The vertical push rod 3 moves down with the residue in the limiting pit 5, and the cleaning brush motor 62 drives the cleaning brush 61 to rotate. When the rotating cleaning brush 61 contacts the limiting pit 5, it can sweep away the residue to prevent the residue from affecting the strength test of the next material.

[0038] When the cleaning brush 61 rotates, the residue can fly away from the limiting pit 5 at a certain speed, which will cause the residue to splash around and be difficult to clean. In order to solve this problem, the particle strength testing system also includes a baffle 63 and a residue collection tray 66. The baffle 63 is arranged on the side of the cleaning brush 61, and the residue collection tray 66 is arranged below the cleaning brush 61. Baffles 63 can be arranged on both sides of the cleaning brush 61. The baffles 63 are basically parallel to the axis of the cleaning brush 61, which can ensure that the residue will not splash outside the baffle 63, which is convenient for cleaning; or baffles 63 can be arranged only on one side where the residue flies away from the limiting pit 5, which can prevent the residue from continuing to splash, and the manufacturing cost is low. The residue collection tray 66 is a disc-shaped structure with high edges and low centers. A through hole (not shown) is arranged at the lowest point of the residue collection tray 66. The residue falling on the residue collection tray 66 gathers to the lowest point under the action of its own gravity.

[0039] On the basis of the above structure, the particle strength test system further includes a waste collection pipe 64 and a waste collection bucket 65. The inlet end of the waste collection pipe 64 is connected to the residue collection tray 66, and the outlet end of the waste collection pipe 64 faces the waste collection bucket 65. The residue gathered at the lowest point of the residue collection tray 66 can enter the waste collection pipe 64 through the through hole of the residue collection tray 66, and then fall into the waste collection bucket 65, thereby realizing automatic collection of residues, reducing the workload of manual cleaning, and providing a good user experience.

[0040] In order to improve the test efficiency, the particle strength test system also includes a tray rotating motor 7, which is connected to the feed turntable 1. The tray rotating motor 7 can drive the feed turntable 1 to rotate around the central shaft 11, and a plurality of limiting pits 5 are distributed in a ring shape on the feed turntable 1. The vertical push rod 3 only moves in the vertical direction. After the feed turntable 1 rotates a certain angle, different limiting pits 5 can be located above the vertical push rod 3. When the vertical push rod 3 moves upward, the material to be tested in the limiting pit 5 can be lifted.

[0041] In order to accurately control the rotation angle of the feed turntable 1, the particle strength test system also includes an electronic positioning device. Compared with the mechanical magnetic induction positioning in the existing strength test, the electronic positioning device can more accurately measure the rotation angle of the feed turntable 1, without the risk of mechanical failure and positioning errors. Especially when a variety of materials to be tested are stored in the feed turntable 1, the electronic positioning device can accurately control the rotation angle of the feed turntable 1, so that the materials to be tested that meet the user's needs arrive above the vertical push rod 3, which is more convenient to use and has higher measurement efficiency.

[0042] On the basis of the above structure, the particle strength test system further includes a vibration device. The vibration device is connected to the feed turntable 1, which can make the feed turntable 1 vibrate to prevent the granular materials to be tested from squeezing and hanging each other, so that the test results are more accurate and the error is smaller.

[0043] The specific structure of the vibration device is not limited. In this embodiment, the vibration device is an electromagnetic oscillator. The specific structure of the electromagnetic oscillator is not limited. Any device that can generate vibration using electromagnetics in the prior art can be used. The product is mature, easy to use, and low in cost. The specific setting position of the electromagnetic oscillator is not limited, as long as it can generate vibration on the feeding turntable 1.

[0044] In this embodiment, if Figure 4As shown, the electromagnetic oscillator includes an electromagnet 91 and an electromagnet core 92 arranged below the residue collection tray 66. A through hole 67 is provided on the residue collection tray 66, and the diameter of the through hole 67 is larger than the diameter of the top of the electromagnet core 92. When the material to be tested cannot be pushed up during the measurement process, the electromagnet 91 is energized and the electromagnet core 92 extends upward. After the electromagnet core 92 passes through the through hole 67, it hits the bottom surface of the feeding turntable 1, thereby causing the feeding turntable 1 to shake, and the massed material to be tested is shaken again. A reset structure (not shown) is connected to the electromagnet core 92. After the electromagnet 91 is powered off, the reset structure can make the electromagnet core 92 retreat below the residue collection tray 66. The electromagnet 91 and the electromagnet core 92 are arranged on the bottom surface of the feeding turntable 1 to save space; the electromagnet core 92 has a long moving distance and a large thrust, and can produce a larger amplitude of vibration on the feeding turntable 1.

[0045] On the basis of the above structure, the particle strength test system also includes a connected control mechanism and a data transmission interface. The data transmission interface can be connected to a terminal such as a computer to realize human-computer interaction. In this embodiment, the control mechanism can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a distributed multi-chip microcontroller. The control program can be run in the microcontroller to control the pressure sensor 2, the servo motor 4, the cleaning brush motor 62, and the tray rotating motor 7 to realize their functions.

[0046] The particle strength test system is compatible with WIN7 / 10 system, easy to operate, can intuitively display the particle size and particle strength test process, and the test data can be completely stored in a txt file or excel file for easy viewing. Compared with the DOS system used in existing strength test devices, the WIN7 / 10 system has the advantages of being upgradeable, multi-functional, and easy to improve the test plan.

[0047] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, but may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Particle strength testing system, characterized in that, include: A feeding turntable (1), used for accommodating materials to be tested; A pressure sensor (2) is located above the feeding turntable (1); A vertical push rod (3) for directly or indirectly bringing the material to be tested into contact with the pressure sensor (2); a servo motor (4), connected to the vertical push rod (3), the servo motor (4) being used to drive the vertical push rod (3) to move along its axial direction; and A vibration device, the vibration device is connected to the feeding turntable (1); the vibration device is an electromagnetic oscillator, the electromagnetic oscillator is arranged on the bottom surface of the feeding turntable (1); the electromagnetic oscillator comprises an electromagnet (91) and an electromagnet core (92) arranged on the bottom surface of the feeding turntable (1); when it is impossible to push the material to be tested during the measurement process, the electromagnet (91) is energized, and the electromagnet core (92) can extend upward until it hits the bottom surface of the feeding turntable (1), thereby causing the feeding turntable (1) to vibrate; a reset structure is connected to the electromagnet core (92), and after the electromagnet (91) is powered off, the reset structure can reset the electromagnet core (92).

2. The particle strength testing system according to claim 1, characterized in that: A plurality of limiting pits (5) are arranged on the feeding turntable (1), and / or a limiting pit (5) is arranged on the top end of the vertical top rod (3), and each limiting pit (5) can accommodate one of the materials to be tested.

3. The particle strength testing system according to claim 2, characterized in that: The particle strength testing system further comprises a cleaning brush (61) and a cleaning brush motor (62) connected to each other, wherein the cleaning brush (61) is used to clean the residues in the limiting pit (5).

4. The particle strength testing system according to claim 3, characterized in that: The particle strength testing system further comprises a baffle (63), wherein the baffle (63) is arranged on the side of the cleaning brush (61).

5. The particle strength testing system according to claim 1, characterized in that: The particle strength testing system further comprises an electronic positioning device, which is used to determine the rotation angle of the feeding turntable (1).

6. The particle strength testing system according to any one of claims 1 to 5, characterized in that: The particle strength testing system further comprises a material tray rotating motor (7), wherein the material tray rotating motor (7) is connected to the material supply turntable (1).

7. The particle strength testing system according to any one of claims 1 to 5, characterized in that: The particle strength testing system further comprises a waste collection pipe (64) and a waste collection bucket (65), wherein the inlet end of the waste collection pipe (64) is connected to a residue collection tray (66), and the outlet end of the waste collection pipe (64) faces the waste collection bucket (65).

8. The particle strength testing system according to any one of claims 1 to 5, characterized in that: The particle strength testing system also includes a data transmission interface.

Images