Testing device for detecting magnetic substances in powder

Abstract

The utility model relates to a test device for detecting magnetic substances in powder, and belongs to the technical field of detection tests. The device comprises a base, a lifting support is arranged on the base, an electromagnetic adsorption device and a stirring mechanism are arranged on the lifting support, the electromagnetic adsorption device comprises a cylindrical electromagnet fixed to the lifting support, and the electromagnet is connected with a power source through a control circuit; the stirring mechanism comprises a vertically-arranged stirring shaft, the stirring shaft is rotatably sleeved with an inner hole of the electromagnet, the upper end and the lower end of the stirring shaft extend outwards, the lower end of the stirring shaft is connected with a set of stirring blades, the upper end of the stirring shaft is connected with a rotating motor, and the rotating motor is fixed to the lifting support; the electromagnet can extend into the liquid container through the lifting support to control on-off of a magnetic field. According to the utility model, a magnetic field generated after the electromagnet is electrified can be used for adsorbing magnetic substances in the powder; the magnetic field disappears after power failure, and then magnetic substances on the circumferential surface of the electromagnet are flushed into a clean liquid container, so that the accurate magnetic substance quantity can be obtained, and the measurement precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection tests, in particular to a test device for detecting magnetic substances in powder. Background Art

[0002] Magnetic material detection is a method of identifying and measuring materials by utilizing their magnetic properties. This method is widely used in many fields, including scientific research, industrial production, quality control, etc. However, the general indicators of silicon micropowder on the market require that the magnetic material should not exceed 5ppm. Due to the small amount of samples to be tested and the requirement for precision, general laboratories use a 1.0T magnetic rod to circulate and stir to adsorb the magnetic material in the powder. The magnetic material is then collected and dried, and the weight obtained is divided by the total weight of the sample to be tested, which is the concentration of the magnetic material in the powder. Due to the large controllable range of this method, the results vary from operator to operator and the error is large.

[0003] After searching, it is found that in the prior art, there is a silicon micropowder magnetic material detection device with a publication number of CN216594636U, which includes a collector, an electric lifting rod, an adsorption stirring assembly and an ultrasonic oscillator. A groove for placing the collector is opened on the left side of the upper end of the detection device body, and an electric lifting rod is installed on the right side of the groove. A support frame is installed on the top of the electric lifting rod, one end of the support frame is rotatably connected to the electric lifting rod, and the other end is connected to the adsorption stirring assembly. An ultrasonic oscillator is installed below the adsorption stirring assembly and located at the upper end of the detection device body. The ultrasonic oscillator includes a water tank and a circuit control board electrically connected to the ultrasonic oscillator. In this structure, since the adsorption stirring assembly adopts a structure in which a trumpet-shaped metal adsorption piece is connected to an electromagnetic block, the vertical area of ​​the adsorption stirring piece is small due to the trumpet shape of the metal adsorption piece, resulting in a low efficiency of adsorption of the magnetic material; more importantly, magnetic materials are easily accumulated on the demagnetized metal adsorption piece, which easily causes the amount of concentrated magnetic materials to be small, affecting the measurement accuracy and results. Utility Model Content

[0004] In order to solve the problem of inaccurate detection results of magnetic content in powder, the utility model provides a test device for detecting magnetic content in powder, which has a simple structure and is easy to use, and can improve the detection accuracy of the magnetic content in powder.

[0005] It adopts the following technical solutions:

[0006] A test device for detecting magnetic substances in powders comprises a base, a lifting bracket is arranged on the base, an electromagnetic adsorption device and a stirring mechanism are arranged on the lifting bracket, the electromagnetic adsorption device comprises a cylindrical electromagnet fixed on the lifting bracket, and the electromagnet is connected to a power supply through a control circuit; the stirring mechanism comprises a vertically arranged stirring shaft, the stirring shaft is rotatably sleeved in the inner hole of the electromagnet, and the electromagnets are extended outward at the upper and lower ends thereof, a group of stirring blades are connected to the lower end of the stirring shaft, and a rotating motor is connected to the upper end, and the rotating motor is fixed on the lifting bracket; the electromagnet can be extended into a liquid container through the lifting bracket to control the on and off of the magnetic field.

[0007] Furthermore, the lifting bracket includes an electric lifter connected to the base and a bracket body connected to the telescopic end of the electric lifter.

[0008] Furthermore, the bracket body is provided with a mounting through hole and a group of threaded through holes connected to the mounting through hole. The telescopic end of the electric lifter is a rod body, which is sleeved in the mounting through hole. A locking screw is connected to the threaded through hole, and the end of the locking screw is pressed against the rod body to form a locking fit between the bracket body and the rod body.

[0009] Furthermore, coaxial bearings are respectively provided at both ends of the inner hole of the electromagnet, and the stirring shaft is sleeved in the bearings.

[0010] Furthermore, the liquid container is a beaker.

[0011] Furthermore, the rotation radius of the stirring blade is greater than the radius of the electromagnet.

[0012] Furthermore, a cleaning mechanism is also connected to the lower part of the stirring shaft, and the cleaning mechanism includes a support rod detachably connected to the stirring shaft, and a group of bristles are vertically arranged along the electromagnet on the support rod, and the bristles are in contact with the peripheral side of the electromagnet, and the length of the bristles is adapted to the axial length of the electromagnet.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model utilizes the large magnetic field generated by the electromagnet after being energized to adsorb the magnetic material in the powder; the magnetic field disappears after the power is turned off, and then the magnetic material is washed into a clean liquid container, thereby achieving a fast and easy operation effect; by setting the electromagnet as a cylindrical structure, the magnetic material cannot accumulate on the circumference of the electromagnet after demagnetization, and a more accurate amount of magnetic material can be obtained, thereby improving the measurement accuracy;

[0015] By setting the liquid container as a beaker, the stirring state of the material can be clearly observed;

[0016] By providing a cleaning mechanism and using a brush to contact the peripheral surface of the electromagnet, the accurate amount of magnetic material can be further obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a test device for detecting magnetic substances in powder in an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the connection structure between the bracket body and the electric lifter in the embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the electromagnetic adsorption device and the stirring mechanism in the embodiment of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the cleaning mechanism in the embodiment of the utility model.

[0021] Explanation of the accompanying drawings: 1. Base; 2. Lifting bracket; 21. Electric lifter; 21a. Rod body; 22. Bracket body; 22a. Cross bar; 22b. Longitudinal bar; 23. Mounting through hole; 24. Threaded through hole; 25. Locking screw; 3. Electromagnetic adsorption device; 31. Electromagnet; 4. Stirring mechanism; 41. Stirring shaft; 42. Stirring blade; 43. Rotating motor; 44. Bearing; 5. Control box; 6. Liquid container; 7. Cleaning mechanism; 71. Support rod; 72. Bristles. DETAILED DESCRIPTION

[0022] In order to make the present invention more clear, a test device for detecting magnetic substances in powder of the present invention is further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0023] like Figure 1 , Figure 2 As shown, a test device for detecting magnetic substances in powders includes a base 1, the upper surface of the base 1 is a support plane, one side of the support plane is fixedly connected to a lifting bracket 2, and the lifting bracket 2 is composed of an electric lifter 21 fixed on the base 1 and a bracket body 22 connected to the lifting end of the electric lifter 21. Here, the electric lifter 21 is vertically arranged, preferably using a micro electric cylinder, the telescopic end of which is a cylindrical rod body 21a, which can reciprocate vertically and has an anti-rotation function. An electromagnetic adsorption device 3 and a stirring mechanism 4 are also provided on the lifting bracket 2.

[0024] The bracket body 22 is in a horizontal L-shape as a whole, and has a horizontal crossbar 22a and a vertical longitudinal bar 22b. One end of the crossbar 22a is provided with a mounting through hole 23 and a pair of threaded through holes 24 connected to the mounting through hole 23. The axes of the two threaded through holes 24 are set at 90 degrees. The telescopic end of the electric lifter 21 is gap-sheathed in the mounting through hole 23. A locking screw 25 is connected to each threaded through hole 24. The stud end of the locking screw 25 passes through the threaded through hole 24 and presses against the rod body 21a of the electric lifter 21, so that the crossbar 22a and the rod body 21a form a locking fit; a through hole is provided at the other end of the crossbar 22a, and a longitudinal bar 22b coaxial with the through hole is fixedly connected to the lower side of the end. The longitudinal bar 22b is a tubular structure, and its material is made of non-ferromagnetic material, such as aluminum alloy.

[0025] The electromagnetic adsorption device 3 includes a vertically arranged electromagnet 31, which is a cylindrical structure, that is, it has an inner hole that passes through from top to bottom at its axial position, and its outer side surface is a smooth circumferential surface. The top surface of the electromagnet 31 is coaxially fixedly connected to the bottom surface of the longitudinal rod 22b. The electromagnet 31 is connected to the control circuit through a wire, and the control circuit is connected to the power supply; wherein, the control circuit can be a simple on-off switch, or a control circuit for adjusting the magnetic size. Since the control circuit is a conventional structure, it will not be repeated here.

[0026] Combination Figure 3 As shown, the stirring mechanism 4 includes a vertically arranged stirring shaft 41, the stirring shaft 41 is made of non-ferromagnetic material, such as aluminum alloy, the stirring shaft 41 penetrates from the through hole of the cross bar 22a, and is rotatably sleeved in the inner hole of the electromagnet 31 through the longitudinal rod 22b, the upper end of which extends out of the cross bar 22a and is directly connected to the output end of the rotating motor 43, and the lower end extends out of the electromagnet 31 and is connected to a group of stirring blades 42, the stirring blades 42 are made of non-ferromagnetic material, such as plastic, and the rotation radius is greater than the radius of the electromagnet 31, and each stirring blade 42 has an inclined action surface, when the group of stirring blades rotates, it can produce stirring force to the liquid axially and laterally. The rotating motor 43 preferably adopts a flange motor, and the rotating motor 43 is fixed to the upper surface of the cross bar 22a by the flange structure. The rotating motor 43, the electric lifter 21 and the control circuit are all electrically connected to the control module, and the control circuit and the control module are all arranged in the control box 5 for easy operation and use. Of course, the control of each component can also be achieved by setting a corresponding switch button.

[0027] The rotational connection between the stirring shaft 41 and the electromagnet 31 is preferably structured as follows: coaxial bearing mounting holes are provided on both sides of the inner hole of the electromagnet 31 near the end, and each bearing mounting hole is fixedly connected to the outer ring of the bearing 44. Here, the bearing 44 preferably adopts a rolling bearing, for example, the rolling bearing is a non-ferromagnetic stainless steel bearing, and the outer end sides of the pair of bearings are provided with a sealing cover. The outer peripheral surface of the stirring shaft 41 is fixed in the inner hole of the pair of bearings 44, and the inner and outer rings of the bearings 44 rotate relative to each other to realize the rotational connection between the stirring shaft 41 and the electromagnet 31. Of course, in some embodiments, the bearing 44 can also adopt a sliding bearing made of a copper-based material.

[0028] A liquid container 6 placed on the base 1 is also provided at the lower side of the electromagnet 31. The liquid container 6 is used as a liquid storage container, and preferably a beaker made of glass material is used to more easily observe the liquid condition. Under the effect of the electric lifter 21, the electromagnet 31 can extend into the liquid container 6.

[0029] In some embodiments, Figure 4 As shown, the bottom end of the stirring shaft 41 can also be detachably connected with a cleaning mechanism 7, and the cleaning mechanism 7 includes an L-shaped support rod 71, and a mounting hole is provided on the lower side cross arm of the support rod 71, and the mounting hole is detachably connected to the lower end surface of the stirring shaft 41 by screws, and a group of bristles 72 arranged vertically along the electromagnet 31 are provided on the vertical arm of the support rod 71, and the bristles 72 are in contact with the side surface of the electromagnet 31, and the length of the bristles 72 is adapted to the axial length of the electromagnet 31. Of course, the detachable connection between the support rod 71 and the stirring shaft 41 can also adopt conventional structures such as conventional clamping and sleeve connection. When it is necessary to remove the magnetic material on the electromagnet 31, the support rod 71 with the bristles 72 is connected to the stirring shaft 41, and the cleaning of the magnetic material on the surface of the electromagnet 31 is achieved by rotating the stirring shaft 41.

[0030] When the device is used, a certain weight of powder is first poured into the liquid container 6, and the same weight of water is added. Then the electric lifter 21 is controlled to make the electromagnet 31 extend into the liquid container 6, and the rotating motor 43 is started to make the stirring blade stir the liquid; after half a minute, the electromagnet 31 is controlled to generate a certain magnetic field, and as the liquid with the powder flows, the magnetic substance is adsorbed on the outer peripheral surface of the electromagnet 31; after about 3 minutes, the rotating motor 43 stops working, and the electric lifter 21 is controlled to make the electromagnet 31 move out of the liquid container 6, and then the liquid container 6 is taken out, and a clean beaker is replaced, and the magnetic field of the electromagnet 31 is controlled to disappear and the electromagnet 31 is washed with flushing water for many times until it is clean. Then the content of magnetic substances in the powder can be obtained by drying and weighing. Of course, in the step of removing magnetic substances, the cleaning mechanism 7 can be installed and the rotating motor 43 can be started, and the removal effect of magnetic substances on the electromagnet 31 can be further improved under the joint action of flushing water and the cleaning mechanism 7.

[0031] The above embodiments of the utility model are merely examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the utility model still belong to the protection scope of the utility model.

Claims

1. A test device for detecting magnetic substances in powder, comprising a base (1), a lifting bracket (2) being provided on the base (1), an electromagnetic adsorption device (3) and a stirring mechanism (4) being provided on the lifting bracket (2), characterized in that: The electromagnetic adsorption device (3) comprises a cylindrical electromagnet (31) fixed on the lifting bracket (2), and the electromagnet (31) is connected to a power supply through a control circuit; the stirring mechanism (4) comprises a vertically arranged stirring shaft (41), the stirring shaft (41) is rotatably sleeved in the inner hole of the electromagnet (31), and the upper and lower ends of the stirring shaft (41) extend outward from the electromagnet (31), the lower end of the stirring shaft (41) is connected to a group of stirring blades (42), and the upper end is connected to a rotating motor (43), and the rotating motor (43) is fixed on the lifting bracket (2); the electromagnet (31) can be extended into the liquid container (6) through the lifting bracket (2) to control the on and off of the magnetic field.

2. A test device for detecting magnetic substances in powder according to claim 1, characterized in that: The lifting bracket (2) comprises an electric lifter (21) connected to the base (1) and a bracket body (22) connected to the telescopic end of the electric lifter (21).

3. A test device for detecting magnetic substances in powder according to claim 2, characterized in that: The bracket body (22) is provided with a mounting through hole (23) and a group of threaded through holes (24) connected to the mounting through hole (23); the telescopic end of the electric lifter (21) is a rod body (21a); ​​the rod body (21a) is sleeved in the mounting through hole (23); a locking screw (25) is connected in the threaded through hole (24); the end of the locking screw (25) is pressed against the rod body (21a) so that the bracket body (22) and the rod body (21a) form a locking fit.

4. A test device for detecting magnetic substances in powder according to claim 3, characterized in that: Coaxial bearings (44) are respectively provided at both ends of the inner hole of the electromagnet (31), and the stirring shaft (41) is sleeved in the bearings (44).

5. A test device for detecting magnetic substances in powder according to claim 1 or 4, characterized in that: The liquid container (6) is a beaker.

6. The test device for detecting magnetic substances in powder according to claim 1, characterized in that: The rotation radius of the stirring blade (42) is greater than the radius of the electromagnet (31).

7. The test device for detecting magnetic substances in powder according to claim 1, characterized in that: The lower part of the stirring shaft (41) is also connected to a cleaning mechanism (7), the cleaning mechanism (7) comprising a support rod (71) detachably connected to the stirring shaft (41), the support rod (71) being provided with a group of bristles (72) vertically arranged along the electromagnet (31), the bristles (72) being in contact with the peripheral side surface of the electromagnet (31), and the arrangement length of the bristles (72) being adapted to the axial length of the electromagnet (31).

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