Device for detecting thickness of fixed grinding disc

Abstract

The utility model discloses a device for detecting the thickness of a fixed grinding disc. The device comprises an insulating sleeve, a metal detection block, a constant current source power supply, a small signal processing module, a display module and a controller, the insulating sleeves are sleeved outside the metal detection blocks and are respectively arranged inside the fixed grinding disc; the bottom surfaces, facing the movable grinding disc, of the insulating sleeves and the metal detection blocks are respectively flush with the outer surface of the fixed grinding disc; the constant-current power supply supplies power to the metal detection block; the small signal processing module receives the voltage of the metal detection block and outputs the amplified voltage to the controller; the controller controls the display module to display the thickness information of the fixed grinding disc in real time; the two oppositely arranged metal sheets are clamped between the insulating sleeve and the metal detection block; one ends of the two wires penetrate through the insulation sleeve and then are connected to the bottom end, away from the movable grinding disc, of the metal sheet, and the other ends of the two wires are used for being connected with a constant current source. The device is convenient to install, and solves the problem of how to measure the abrasion thickness of the abrasive disc in the closed space online in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding disc thickness detection, in particular to a device for detecting the thickness of a fixed grinding disc. Background Art

[0002] Grinding discs are commonly used in the fields of graphite carbon pole, papermaking, and tobacco production. The lower dynamic mill and the upper fixed mill are equipped with grinding discs. A complete grinding disc consists of three fan-shaped discs, which are bolted to the corresponding dynamic and fixed mills. The wear of the grinding discs in a closed space is difficult to accurately detect online in real time. If the wear of the grinding discs cannot be detected in time, the particles of the ground products will be too large or even unqualified, affecting economic benefits.

[0003] The application number is CN According to the Chinese utility model patent No. 201220351279.4 entitled "A real-time detection system for the thickness of automobile brake pads", two eddy current sensors are arranged on the brake calipers of the four wheels of the automobile, namely the left front, right front, left rear and right rear wheels. The eddy current sensors are installed on the brake calipers through sensor brackets. The signal sending end of the eddy current sensor is opposite to the position of the brake disc, and the probe surface of the eddy current sensor is on the same vertical plane as the outer side of the brake pad. The eddy current sensor is used to detect the thickness signal of the brake pad in real time; each of the above-mentioned eddy current sensors is connected in series with a sampling resistor RL and a sensor power switch S in sequence and then connected to both sides of the sensor power supply. The current signal collected by the eddy current sensor is converted into a voltage signal through the sampling resistor RL, and the sampling resistor RL is connected to the input end of the signal processing module. The signal processing module is used to calculate the thickness of the brake pad. The power supply end of the signal processing module is provided with a power switch S, and the brake pedal is used as a limit switch S. The signal of the limit switch S is connected to the signal processing module to control whether the signal processing module performs data processing. The display module is connected to the signal processing module to display the thickness information of the brake pad, and the output end of the signal processing module is connected to an audible and visual alarm device. Although the above utility model patent realizes that the signal processing module is used to calculate the thickness of the brake pad according to the voltage signal, it is not easy to install the eddy current sensor in the closed grinding disc area.

[0004] Therefore, there is an urgent need for a device for detecting the thickness of a fixed grinding disc that is suitable for a grinding disc with a closed space and is easy to install. Utility Model Content

[0005] The utility model aims to provide a device for detecting the thickness of a fixed grinding disc which is suitable for a grinding disc with a closed space and is easy to install.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for detecting the thickness of a fixed grinding disc comprises an insulating sleeve, a metal detection block, a constant current source power supply, a small signal processing module, a display module and a controller;

[0008] The insulating sleeve is sleeved on the outside of the metal detection block and is respectively placed inside the fixed grinding disc, and the bottom surfaces of the insulating sleeve and the metal detection block facing the movable grinding disc are respectively flush with the outer surface of the fixed grinding disc;

[0009] The constant current source power supply provides power for the metal detection block;

[0010] The small signal processing module receives the voltage of the metal detection block and outputs the amplified voltage to the controller;

[0011] The controller obtains the thickness information of the current fixed grinding disc according to the amplified voltage and controls the display module to display the thickness information of the fixed grinding disc in real time;

[0012] It also includes two semicircular metal sheets arranged opposite to each other, wherein the metal sheets are clamped between the insulating sleeve and the metal detection block; one end of two wires are respectively connected to the bottom end of the metal sheet away from the moving grinding disc after passing through the insulating sleeve, and the other ends of the two wires are used to connect to a constant current source.

[0013] Furthermore, the metal detection block comprises at least two layers of metal of different materials, and the conductivity of each layer of metal decreases in sequence from close to far away from the moving grinding disc;

[0014] The bottom surface of the metal layer farthest from the moving grinding disc and facing the moving grinding disc is the predetermined prompt position of the fixed grinding disc.

[0015] Furthermore, the metal detection block comprises two layers of metals of different materials, the metal of the top layer away from the moving grinding disc is silver, and the metal of the bottom layer is any one of lead, chromium, iron and aluminum.

[0016] Furthermore, the metal detection block includes five layers of metals, which are lead, chromium, iron, aluminum and silver, in sequence from the direction approaching to the direction away from the moving grinding disc.

[0017] Furthermore, along the direction from approaching to away from the movable grinding disc, the metal thicknesses of the five layers are respectively 36%, 27%, 17%, 12% and 8% of the total thickness of the metal detection block.

[0018] Furthermore, the fixed grinding disc includes three sector-shaped discs, and each sector-shaped disc is respectively provided with a device for detecting the thickness of the fixed grinding disc.

[0019] Furthermore, it also includes a base rotatably connected to the bottom surface of the movable grinding disc, and the display module is arranged on the base.

[0020] Furthermore, it also includes an alarm light, and the amplified voltage change is displayed by the brightness change of the alarm light.

[0021] In the above technical solution, the device for detecting the thickness of the fixed grinding disc of the utility model has the following features:

[0022] Beneficial effects:

[0023] The utility model uses the wear of the grinding disc and the change in resistance of the metal detection block to cause the voltage of the metal detection block to change, and then uses the small signal processing module to amplify the voltage of the metal detection block to a multiple that is easy for the controller to identify, so that the thickness change of the fixed grinding disc can be reflected according to the change in voltage. This avoids the situation that the grinding disc cannot detect the wear of the grinding disc in time, resulting in the grinding product particles being too large or even unqualified, which affects the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A schematic diagram of the structure of the device provided by the utility model;

[0026] Figure 2 A schematic diagram of the top view of the fixed grinding disc provided by the utility model;

[0027] Figure 3 This is a schematic diagram of the assembly structure of the metal detection block and the metal sheet provided by the utility model.

[0028] Description of reference numerals:

[0029] Insulating sleeve 1, metal detection block 2, metal sheet 3. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] It should be noted that the terms "above", "one end", "upper", etc. used in this article indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Similar expressions are only for the purpose of illustration, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "one part", "two parts", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] like Figure 1-3 The device shown is for detecting the thickness of a fixed grinding disc, comprising an insulating sleeve 1, a metal detection block 2, a metal sheet 3, a constant current source power supply, a small signal processing module, a display module and a controller.

[0033] The fixed grinding disc of the grinding disc is above the moving grinding disc. The fixed grinding disc is provided with a blind hole or a through hole for installing an insulating sleeve 1, a metal detection block 2, and a metal sheet 3. The metal detection block 2 is cylindrical.

[0034] The insulating sleeve 1 is sleeved on the outside of the metal detection block 2 and is respectively placed inside the fixed grinding disc. The bottom surfaces of the insulating sleeve 1 and the metal detection block 2 facing the movable grinding disc are respectively flush with the outer surface of the fixed grinding disc.

[0035] Two semicircular metal sheets 3 are arranged opposite to each other, and the metal sheets 3 are sandwiched between the insulating sleeve 1 and the metal detection block 2, and the two metal sheets 3 surround a ring. One end of the two wires passes through the insulating sleeve 1 and is respectively connected to the bottom end of the metal sheet 3 away from the moving grinding disc, and the other end of the two wires is used to connect to the constant current source power supply, so that the constant current source power supply energizes the metal sheet 3 and the metal detection block 2. The two wires are connected to the circumference of the metal sheet 3. If there is no metal sheet, only the insulating sleeve 1 sleeved on the metal detection block 2, the wire needs to be fixed on the metal detection block 2 by direct welding or other methods, and it is not easy to install the metal detection block 2 and the wire. After using two metal sheets, the metal sheet 3 is in the form of a sheet, and the thickness is preferably 1mm, and the effect on the resistance value of the metal detection block 2 is so small that it can be ignored; in addition, the insulating sleeve 1, the corresponding metal sheet 3 and the wire can be installed in the fixed grinding disc first, and then the metal detection block 2 can be installed in the fixed grinding disc. In this way, it is easy to realize the separate installation of the metal detection block 2 and the wire, and the metal detection block 2 and the wire are connected through the metal sheet.

[0036] The constant current source power supply provides power to the metal detection block 2 so that the current passing through both ends of the metal detection block 2 is constant.

[0037] The small signal processing module receives the voltage of the metal detection block 2 and outputs the amplified voltage to the controller. Since the voltage variation at both ends of the metal detection block 2 is small, a small signal processing module of a small signal processing circuit type is required to filter and remove interference signals. Optionally, the small signal processing module amplifies the voltage of the metal detection block 2 to 0-3.3V, 0-5V, or 0-10V.

[0038] The controller obtains the thickness information of the current fixed grinding disc according to the amplified voltage and controls the display module to display the thickness information of the fixed grinding disc in real time. The controller is preferably a single chip microcomputer.

[0039] Preferably, the metal detection block 2 comprises at least two layers of metal of different materials, and the conductivity of each layer of metal decreases successively and the thickness of each layer of metal decreases successively along the direction from approaching to away from the moving grinding disc;

[0040] The bottom surface of the metal layer farthest from the moving grinding disc and facing the moving grinding disc is the predetermined prompt position of the fixed grinding disc.

[0041] The structure of the metal detection block 2 is improved to different layers of metal stacked together, and the electrical conductivity of the metal decreases in the direction from close to far away from the moving grinding disc, that is, from bottom to top. This is conducive to the voltage change at both ends of the metal detection block 2 having a gradient, rather than a uniform decrease as the thickness decreases. This situation is particularly suitable for the device also including a sound alarm component, such as a lamp bead. The voltage of the sound alarm device is the same as the voltage amplified by the small signal processing module, so that the brightness of the lamp bead will change differently in different metal layers.

[0042] Optional, such as Figure 3 As shown, the metal detection block 2 includes two layers of metal of different materials. The metal of the top layer away from the moving grinding disc is silver, and the metal of the bottom layer is any one of lead, chromium, iron, and aluminum. And the thickness of the silver in the top layer is less than that in the bottom layer. This situation is particularly suitable for the device also including a sound alarm component, such as a lamp bead. The voltage of the sound alarm device is the same as the voltage amplified by the small signal processing module, so that the lamp bead is between the two layers of metal. Schematically, when the bottom metal is worn away, the contact surface of the two layers of metal is a predetermined prompt position, and the top metal is connected to a constant current source. The brightness change of the lamp bead will weaken. The effect is similar to grading the brightness of the lamp bead, and using different metal layers to achieve layered alarms, eliminating special programming work.

[0043] Optionally, the metal detection block 2 includes five layers of metals, which are lead, chromium, iron, aluminum and silver, in sequence from the direction approaching to the direction away from the moving grinding disc.

[0044] Specifically, along the direction from close to far from the moving grinding disc, the metal thickness of the five layers is 36%, 27%, 17%, 12%, and 8% of the total thickness of the metal detection block 2. This is conducive to the voltage change at both ends of the metal detection block 2 having a gradient, rather than a uniform decrease as the thickness decreases. After amplification, the voltage of the metal detection block 2 is 10V, 9.2V, 7.9V, 6.2V, 3.9V, and 0V.

[0045] A cylindrical metal detection module is installed on the fixed grinding disc. The cylinder is divided into five layers. From bottom to top, each layer has different metal materials, namely lead, chromium, iron, aluminum, and silver. The thickness of lead is specially set to account for 36% of the total thickness, chromium accounts for 27%, iron accounts for 17%, aluminum accounts for 12%, and silver accounts for 8%. The metal detection block 2 is embedded with an insulating sheath to insulate it from the grinding disc, and then a constant DC current is provided to the detection metal block through an external constant current source power supply. During use, the grinding disc and the metal detection block are worn synchronously, which will cause the cross-section of the metal detection block to become smaller and the resistance to decrease. The voltage at both ends of the metal detection block is detected by detection. At the same time, after the wear of each metal disappears, the resistance value will change significantly. The five metals correspond to five alarm levels, and the wear thickness can also be indirectly reflected. This new device solves the problem of the difficulty of real-time online and accurate detection of grinding disc wear in a closed space, and avoids the problem of excessive or even unqualified particles of the ground products due to the inability to detect the wear of the grinding disc in time, which affects the economic benefits.

[0046] Preferably, the fixed grinding disc comprises three sector-shaped discs, and each sector-shaped disc is respectively provided with a device for detecting the thickness of the fixed grinding disc.

[0047] Preferably, it also includes a base rotatably connected to the bottom surface of the movable grinding disc, and the display module is arranged on the base.

[0048] Preferably, it also includes an alarm light, and the amplified voltage change is displayed by changing the brightness of the alarm light.

[0049] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for detecting the thickness of a fixed grinding disc, characterized in that: It comprises an insulating sleeve (1), a metal detection block (2), a constant current source power supply, a small signal processing module, a display module and a controller; The insulating sleeve (1) is sleeved on the outside of the metal detection block (2) and is placed inside the fixed grinding disc, and the bottom surfaces of the insulating sleeve (1) and the metal detection block (2) facing the movable grinding disc are respectively flush with the outer surface of the fixed grinding disc; The constant current source power supply provides power for the metal detection block (2); The small signal processing module receives the voltage of the metal detection block (2) and outputs the amplified voltage to the controller; The controller obtains the thickness information of the current fixed grinding disc according to the amplified voltage and controls the display module to display the thickness information of the fixed grinding disc in real time; It also comprises two semicircular metal sheets (3) arranged opposite to each other, wherein the metal sheets (3) are sandwiched between the insulating sleeve (1) and the metal detection block (2); one end of two wires are respectively connected to the bottom end of the metal sheet (3) away from the moving grinding disc after passing through the insulating sleeve (1), and the other ends of the two wires are used to be connected to a constant current source.

2. The device for detecting the thickness of a fixed grinding disc according to claim 1, characterized in that: The metal detection block (2) comprises at least two layers of metal of different materials, and the electrical conductivity and thickness of each layer of metal decrease successively from approaching to away from the moving grinding disc; The bottom surface of the metal layer farthest from the moving grinding disc and facing the moving grinding disc is the predetermined prompt position of the fixed grinding disc.

3. The device for detecting the thickness of a fixed grinding disc according to claim 2, characterized in that: The metal detection block (2) comprises two layers of metals of different materials, the metal of the top layer away from the moving grinding disc is silver, and the metal of the bottom layer is any one of lead, chromium, iron and aluminum.

4. The device for detecting the thickness of a fixed grinding disc according to claim 2, characterized in that: The metal detection block (2) comprises five layers of metals, which are lead, chromium, iron, aluminum and silver, respectively, in sequence from the direction approaching to the direction away from the moving grinding disc.

5. The device for detecting the thickness of a fixed grinding disc according to claim 4, characterized in that: Along the direction from approaching to far away from the moving grinding disc, the metal thicknesses of the five layers are respectively 36%, 27%, 17%, 12% and 8% of the total thickness of the metal detection block (2).

6. The device for detecting the thickness of a fixed grinding disc according to claim 1, characterized in that: The fixed grinding disc comprises three sector-shaped discs, and each sector-shaped disc is respectively provided with a device for detecting the thickness of the fixed grinding disc.

7. The device for detecting the thickness of a fixed grinding disc according to claim 1, characterized in that: It also includes a base rotatably connected to the bottom surface of the moving grinding disc, and the display module is arranged on the base.

8. The device for detecting the thickness of a fixed grinding disc according to claim 1, characterized in that: Also included is a warning light, the amplified voltage change is displayed by changing the brightness of the warning light.

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