Powder resistivity testing device

Abstract

The utility model relates to a powder resistivity testing device which comprises a base and a vibration seat which is arranged on the base and generates vibration, and a powder sample column used for storing powder is arranged on the vibration seat. An upper copper column electrode abutting against powder in the powder sample column is arranged at the top of the powder sample column, a lower copper column electrode abutting against the powder in the powder sample column is arranged in the vibration base, the upper copper column electrode and the lower copper column electrode are electrically connected with a milliohmmeter, and the powder in the powder sample column is compacted through vibration generated by the vibration base. When the powder is compacted, the powder in the powder sample column can flow and be filled well under the action of vibration force, so that powder particles are rearranged, gaps are filled, and the compactness and the stability of the powder are improved; and the compacted powder is detected through a milliohmmeter, so that the detection precision and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder resistivity detection technical field especially powder resistivity testing device. BACKGROUND

[0002] The main purpose of resistivity testing of electromagnetic shielding materials is to evaluate their shielding effectiveness, optimize material performance, and ensure product quality.

[0003] A kind of insulation resistivity testing device of fireproof cable powder insulating material is disclosed in Chinese patent with publication number CN118549704A, it is related to powder resistivity measurement field.The application includes cylindrical metal shell, the two ends of cylindrical metal shell are respectively provided with insulating first electrode cover and second electrode cover, high-voltage electrode is arranged between first electrode cover and second electrode cover, chamber exists between cylindrical metal shell and high-voltage electrode, annular groove corresponding to chamber is provided on first electrode cover and second electrode cover, first electrode cover is provided with compacting mechanism, compacting mechanism is connected with annular movable pressing block sliding in annular groove, high-voltage electrode is connected with high-voltage direct current power supply, high-voltage direct current power supply generates high-voltage and acts on high-voltage electrode, so that high-voltage electrode, powder insulating material arranged in chamber, cylindrical metal shell and ground form a loop, multi-range signal acquisition circuit acquires electric signal and transmits to controller, controller determines powder insulation resistivity according to electric signal and effective length of powder.In the above technical solution, powder is compacted by compacting mechanism.The degree of compaction of powder is determined by static pressure and static pressure time generated by compacting mechanism, thereby affecting compacting efficiency. SUMMARY

[0004] The utility model aims at providing a kind of powder resistivity testing device, to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model adopts the technical scheme of a kind of powder resistivity testing device, including base and the vibration seat that setting base generates vibration, vibration seat is provided with powder sample column for storing powder;The top of powder sample column is provided with the upper copper column electrode that is in abutment with the powder in powder sample column, lower copper column electrode is provided in vibration seat and is in abutment with the powder in powder sample column, and upper copper column electrode and lower copper column electrode are electrically connected milliohm respectively.

[0006] Compared with prior art, the powder in powder sample column is compacted by vibration generated by vibration seat, in the process of being compacted, under the action of vibration force, powder in powder sample column, powder can be well flowed and filled, so that powder particles are rearranged, voids are filled, and the density and stability of powder are improved;The compacted powder is detected by milliohm, and the precision and accuracy of detection are improved.

[0007] The preferred technical scheme of the application is that the base is provided with an inwardly recessed mounting groove, the vibration seat is arranged in the mounting groove, and a spring is arranged between the bottom surface of the vibration seat and the bottom surface of the mounting groove; the center of the vibration seat is provided with a mounting hole, and the mounting hole and the powder sample column are arranged perpendicularly to each other; and a vibration motor is fixedly mounted in the mounting hole.

[0008] The preferred technical scheme of the application is that the vibration seat is fixedly mounted with a connecting seat above, the top of the connecting seat is provided with a fixing hole matched with the powder sample column, and the bottom of the powder sample column is fixedly mounted in the fixing hole.

[0009] The preferred technical scheme of the application is that the powder sample column is provided with a through storage hole, one end of the lower copper column electrode is fixedly mounted at the bottom of the storage hole, the other end is inserted into the connecting seat, one end of the upper copper column electrode is slidingly connected to the top of the storage hole, and the other end extends out of the powder sample column.

[0010] The preferred technical scheme of the application is that the connecting seat is provided with an insertion hole coaxially arranged with the storage hole, the lower copper column electrode is inserted into the insertion hole, and an insulating layer is arranged between the insertion hole and the lower copper column electrode.

[0011] The preferred technical scheme of the application is that the connecting seat is provided with a wiring hole connected with the insertion hole, a lower wiring column is arranged in the wiring hole, one end of the lower wiring column is fixedly connected with the lower copper column electrode, and the other end of the lower wiring column extends out of the connecting seat.

[0012] The preferred technical scheme of the application is that the top of the upper copper column electrode is fixedly mounted with an upper wiring column, a counterweight ring is arranged below the upper wiring column, and the counterweight ring is fixedly mounted on the upper copper column electrode and located outside the powder sample column.

[0013] In addition to the technical problems solved by the application, the technical features constituting the technical scheme, and the advantages brought by the technical features, other technical problems solved by the application, other technical features included in the technical scheme, and the advantages brought by the technical features will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is the assembly cutaway view of the application.

[0015] Fig. 2 is the assembly perspective view of the application.

[0016] BRIEF DESCRIPTION OF DRAWINGS: 01. Base, 02. Vibration seat, 03. Powder sample column, 04. Upper copper column electrode, 05. Lower copper column electrode, 06. Mounting groove, 07. Mounting hole, 08. Vibration motor, 09. Connecting seat, 10. Fixing hole, 11. Storage hole, 12. Insertion hole, 13. Wiring hole, 14. Lower wiring column, 15. Upper wiring column, 16. Counterweight ring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model.

[0018] Please refer to Figs. 1-2 The utility model discloses a powder resistivity testing device, including base 01 and setting the vibration seat 02 on base 01, be provided with the powder sample column 03 for depositing powder (electromagnetic shielding powder) on the vibration seat 02. The operator places the powder material in the powder sample column 03, then the powder in the powder sample column 03 is vibrated and compacted by the vibration seat 02. Make all the powder particles closely adhere together. The top of the powder sample column 03 is provided with the upper copper column electrode 04 that abuts with the powder in the powder sample column 03, the lower copper column electrode 05 that abuts with the powder in the powder sample column 03 is provided in the vibration seat 02, the resistivity of the powder in the powder sample column 03 can be detected by electrically connecting milliohm meter on the upper copper column electrode 04 and lower copper column electrode 05 respectively.

[0019] The base 01 is provided with the mounting groove 06 that is recessed inward, and the cross-sectional area of the mounting groove 06 is greater than that of the vibration seat 02. The vibration seat 02 is arranged in the mounting groove 06, and a spring is arranged between the bottom surface of the vibration seat 02 and the bottom surface of the mounting groove 06. When the vibration seat 02 is pressed, the vibration seat 02 moves towards the bottom surface of the mounting groove 06, and the spring is compressed. When the pressing force of the vibration seat 02 is removed, the vibration seat 02 moves towards the top surface of the mounting groove 06 under the action of the spring and returns to the initial position. A mounting hole 07 is arranged at the center of the vibration seat 02, and the mounting hole 07 and the powder sample column 03 are arranged perpendicular to each other. The vibration motor 08 is fixedly installed in the mounting hole 07 by interference fit or glue fixing. The vibration motor 08 generates vibration when working and acts on the vibration seat 02, so that the vibration seat 02 and the powder sample column 03 installed thereon vibrate synchronously, the powder in the powder sample column 03 is compacted by vibration, so that each powder particle closely adheres together. At the same time, the vibration seat 02 and the base 01 are connected by the spring, so that the vibration seat 02 and the base 01 do not interfere with each other when the vibration seat 02 vibrates.

[0020] A connecting seat 09 is fixedly installed above the vibration seat 02 by a fastener, a fixing hole 10 adapted to the powder sample column 03 is arranged at the top of the connecting seat 09, and the bottom of the powder sample column 03 is fixedly installed in the fixing hole 10. The bottom of the powder sample column 03 and the fixing hole 10 are preferably fixed by glue, and the setting of the fixing hole 10 is equivalent to embedding the powder sample column 03 in the connecting seat 09. The phenomenon that the powder sample column 03 separates from the connecting seat 09 when the connecting seat 09 vibrates is avoided.

[0021] The powder sample column 03 is provided with a through storage hole 11, and one end of the lower copper column electrode 05 is fixedly installed at the bottom of the storage hole 11. The other end is inserted into the connecting seat 09, and the upper copper column electrode 04 is slidably connected to the top of the storage hole 11. The other end extends out of the powder sample column 03. The one end of the lower copper column electrode 05 is fixed in the storage hole 11. The upper copper column electrode 04 is slidably arranged in the storage hole 11, and the purpose is to provide an auxiliary compacting effect. The vibration of the vibration seat 02 and the gravity of the upper copper column electrode 04 simultaneously act on the powder in the storage hole 11.

[0022] The connecting seat 09 is provided with a through insertion hole 12 coaxially arranged with the storage hole 11, the lower copper column electrode 05 is inserted into the insertion hole 12, and an insulating layer is arranged between the insertion hole 12 and the lower copper column electrode 05. The insulating layer can be formed by filling insulating glue or can be formed by winding insulating tape on the lower copper column electrode 05. At the same time, the insulating layer can fixedly install the lower copper column electrode 05 on the connecting seat 09.

[0023] One side of the connecting seat 09 is provided with a wiring hole 13 connected with the insertion hole 12, and a lower wiring column 14 is arranged in the wiring hole 13. One end of the lower wiring column 14 is fixedly connected with the lower copper column electrode 05 by welding or by arranging a threaded hole on the lower copper column electrode 05 and arranging external threads on the lower wiring column 14. One end of the lower wiring column 14 extends out of the connecting seat 09. It is convenient to electrically connect with the external milliohm meter.

[0024] The top of the upper copper column electrode 04 is fixedly installed with an upper wiring column 15, and a counterweight ring 16 is arranged below the upper wiring column 15. The counterweight ring 16 is fixedly installed on the upper copper column electrode 04 and located outside the powder sample column 03. The overall weight of the upper copper column electrode 04 is increased by arranging the counterweight ring 16, so as to improve the pressing force of the upper copper column electrode 04.

[0025] It should be noted that the powder sample column 03 is made of transparent acrylic, and the transparent acrylic can directly observe whether the powder in the storage hole 11 is compacted.

[0026] In use, the operator connects the connecting line of the milliohm meter to the upper and lower wiring columns, respectively, then takes down the upper copper column electrode 04, then puts the powder sample to be measured into the storage hole 11 from the top of the powder sample column 03, and then inserts the upper copper column electrode 04 into the storage hole 11 again. The vibration motor 08 is started, so that the vibration seat 02 starts to vibrate, and the vibration of the vibration seat 02 and the pressure of the upper copper column electrode 04 compact the powder in the storage hole 11. The vibration motor 08 stops working. The milliohm meter is started to test the resistivity of the powder.

[0027] If the embodiments of the utility model have involved directionality indication (such as up, down, left, right, front, back......), then the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality indication also changes accordingly.

[0028] The above embodiments only describe the preferred embodiments of the utility model, and do not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by the ordinary engineering technicians in the art without departing from the design spirit of the utility model should fall within the protection scope determined by the claims of the utility model.

Claims

1. A powder resistivity testing device, characterized by, The base and the vibration seat are arranged on the base to generate vibration, and the vibration seat is provided with a powder sample column for storing powder; the top of the powder sample column is provided with an upper copper column electrode abutting against the powder in the powder sample column, and the vibration seat is provided with a lower copper column electrode abutting against the powder in the powder sample column; the upper copper column electrode and the lower copper column electrode are respectively electrically connected with a milliohm meter.

2. The powder resistivity testing device of claim 1, wherein: The base is provided with an inwardly recessed mounting groove, the vibration seat is arranged in the mounting groove, and a spring is arranged between the bottom surface of the vibration seat and the bottom surface of the mounting groove; the center of the vibration seat is provided with a mounting hole, and the mounting hole and the powder sample column are arranged vertically to each other; and the vibration motor is fixedly installed in the mounting hole.

3. The powder resistivity testing device of claim 2, wherein: The vibration seat is fixedly installed above the base, the top of the connecting seat is provided with a fixing hole matched with the powder sample column, and the bottom of the powder sample column is fixedly installed in the fixing hole.

4. The powder resistivity testing device of claim 3, wherein: The powder sample column is provided with a through storage hole, one end of the lower copper column electrode is fixedly installed at the bottom of the storage hole, the other end of the lower copper column electrode is inserted into the connecting seat, one end of the upper copper column electrode is slidingly connected to the top of the storage hole, and the other end of the upper copper column electrode extends out of the powder sample column.

5. The powder resistivity testing device of claim 4, wherein: The connecting seat is provided with an insertion hole coaxially arranged with the storage hole, the lower copper column electrode is inserted into the insertion hole, and an insulating layer is arranged between the insertion hole and the lower copper column electrode.

6. The powder resistivity testing device of claim 5, wherein: One side of the connecting seat is provided with a wiring hole connected with the insertion hole, the lower wiring column is arranged in the wiring hole, one end of the lower wiring column is fixedly connected with the lower copper column electrode, and the other end of the lower wiring column extends out of the connecting seat.

7. The powder resistivity testing device of claim 6, wherein: The top of the upper copper column electrode is fixedly installed with the upper wiring column, and the lower wiring column is arranged with a counterweight ring below the upper wiring column; the counterweight ring is fixedly installed on the upper copper column electrode and located outside the powder sample column.

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