1. A sampling drill bit, comprising:

the spiral piece barrel sleeve (1), wherein the outer surface of the spiral piece barrel sleeve (1) is provided with a spiral piece (11);

the electromagnet (2) is arranged in the inner cavity of the spiral piece cylinder sleeve (1);

and the drill bit (3) is arranged at the front end of the spiral piece barrel sleeve (1).

2. The sampling drill according to claim 1, characterized in that the drill (3) is an eccentric drill, the center of the drill (3) not coinciding with the center of rotation of the spiral-plate cartridge (1).

3. The sampling drill according to claim 1, characterized in that the rear end of the spiral blade cartridge (1) is connected with a drill connecting body (4), and the drill connecting body (4) is connected with a rotating shaft of a motor (5).

4. The sampling drill according to claim 1, characterized in that the spiral sheet cartridge (1) is a cartridge made of magnetically conductive material.

5. A sampling method, which is characterized in that the sampling drill bit according to any one of claims 1-4 is used for sampling, and the sampling method comprises the following steps:

the helical-lobe cylinder sleeve (1) and the drill bit (3) rotate together to drill into the sampled object;

when the helical blade cylinder sleeve (1) and the drill bit (3) reach the designated depth, stopping rotating, electrifying the electromagnet (2) in the inner cavity of the helical blade cylinder sleeve (1), generating electromagnetic force on the surface of the helical blade cylinder sleeve (1), and adsorbing a sample substance on the surface of the helical blade cylinder sleeve (1) through the electromagnetic force;

the sampling drill bit is taken out of the sampled object, the electromagnet (2) is powered off after the sampling drill bit reaches the specified unloading position, the spiral piece cylinder sleeve (1) is demagnetized, and the sample substance adsorbed on the surface of the spiral piece cylinder sleeve (1) falls down.

Background

The steel industry is an important support for national economy in China, plays an important role in the aspects of economic construction, social development, financial tax, national defense construction, stable employment and the like, and makes an important contribution to guaranteeing good and fast development of national economy. However, the contradictions accumulated by the long-term extensive development of the domestic steel industry are increasingly prominent, such as the problems of insufficient high-end products, excessive capacity, low industrial concentration ratio, unreasonable regional distribution, environmental protection and the like. With the increasing attention on the aspect of environmental protection, the utilization of scrap steel smelting renewable resources and future domestic steelmaking, the use of scrap steel as a raw material are important trends of technical development and reform of all steel enterprises.

In the scrap steel smelting technology, sampling scrap steel and scrap iron and then evaluating the utilization value of the scrap steel and scrap iron are important links. The existing sampling mode of scrap steel and scrap iron usually adopts the end face of an electromagnetic chuck to generate magnetic force, materials are absorbed through the end face of the chuck, and if a certain material sample amount needs to be absorbed, a chuck with a larger end area is often needed; so that the material can not be sampled inside, if the material is sampled inside, the sampling amount is quite small, and the sampling requirement can not be met. Due to the irregular shapes and inconsistent particle sizes of the scrap iron and the scrap, and the surface sampling mode, the adopted sample has poor representativeness, can not accurately reflect the real condition of the scrap iron, and deviates from the objective evaluation of the value of the whole scrap iron and scrap.

Although the sampling head adopting the spiral drill bit can enter a sampler for deep sampling, when sampling, the sampling head is easy to be clamped and seized by hard materials when encountering massive broken iron or foreign matters, so that the sampling head is damaged or broken. In addition, the traditional sampling is usually a manual mode, the labor intensity is very high, the labor cost is high, and the possibility of fraud exists in manual sampling.

Therefore, there is a need to develop a new sampling device suitable for sampling scrap iron and steel chips to solve the above problems.

Disclosure of Invention

The invention mainly aims to provide a sampling drill bit and a sampling method thereof, and at least solves the technical problems that the existing waste steel scrap iron chip electromagnetic chuck sampling mode cannot enter the material for sampling and the sampling quantity is small.

To achieve the above object, according to one aspect of the present invention, there is provided a sampling drill bit comprising:

the outer surface of the spiral piece cylinder sleeve is provided with a spiral piece;

the electromagnet is arranged in the inner cavity of the spiral sheet cylinder sleeve;

and the drill bit is arranged at the front end of the spiral piece barrel sleeve.

Further, the drill bit is an eccentric drill bit, and the center of the drill bit is not coincident with the rotation center of the spiral piece barrel sleeve.

Furthermore, the rear end of the spiral piece barrel sleeve is connected with a drill bit connector, and the drill bit connector is connected with a rotating shaft of a motor.

Furthermore, the spiral sheet cylinder sleeve is a cylinder sleeve made of magnetic conductive material.

According to another aspect of the present invention, there is provided a sampling method using the sampling drill described above, the sampling method comprising:

the helical-lobe barrel sleeve and the drill bit rotate together to drill into the sampled object;

when the helical blade cylinder sleeve and the drill reach the specified depth, stopping rotating, electrifying the electromagnet in the inner cavity of the helical blade cylinder sleeve, generating electromagnetic force on the surface of the helical blade cylinder sleeve, and adsorbing sample substances on the surface of the helical blade cylinder sleeve through the electromagnetic force;

and taking out the sampling drill bit from the sampled object, powering off the electromagnet after the sampling drill bit reaches the specified unloading position, demagnetizing the spiral piece barrel sleeve, and falling the sample substance adsorbed on the surface of the spiral piece barrel sleeve.

By applying the technical scheme of the invention, the helical blade sleeve is adopted, the electromagnet is arranged in the inner cavity of the helical blade sleeve, and the drill bit is arranged at the front end of the helical blade sleeve; through the helical-lobe barrel casing and the drill bit, deep inside sampling of the material can be easily got into. During sampling, the helical blade cylinder sleeve and the drill bit can rotate together to drill the sampling drill bit into a sampled object, the surface of the helical blade cylinder sleeve generates magnetic force through the electromagnet, and materials are absorbed through the surface of the whole helical blade cylinder sleeve; if the sampling volume that needs is more, only need increase the length of flight barrel casing, need not to increase the diameter of flight barrel casing, can not increase the resistance that the sampling drill bit got into the material inside, the sampling drill bit still can get into the material inside easily and take a sample. The sampling drill bit is simple in structure and convenient to operate, and the problems that an existing electromagnetic chuck sampling mode cannot enter the internal sampling of materials, and the sampling quantity is small are well solved.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a sampling drill according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. a spiral piece sleeve; 2. an electromagnet; 3. a drill bit; 4. a drill bit connector; 5. a motor; 11. a spiral sheet.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of the words "a" or "an" and the like in the description and claims of the present patent application do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Referring to fig. 1, a sampling drill according to an embodiment of the present invention is mainly used for sampling scrap iron, and may also be applied to sampling other magnetic bulk materials. As can be seen from the figure, the sampling drill bit mainly comprises a spiral slice barrel sleeve 1, an electromagnet 2 and a drill bit 3. Wherein, the outer surface of the spiral slice cylinder sleeve 1 is provided with a spiral slice 11, and the interior of the spiral slice cylinder sleeve 1 is provided with a cavity; the electromagnet 2 is arranged in the inner cavity of the spiral slice barrel sleeve 1; the drill bit 3 is arranged at the front end of the spiral piece barrel sleeve 1.

Because the shapes of the scrap iron pieces are irregular and the particle sizes of the scrap iron pieces are inconsistent, if only surface sampling is carried out, the representativeness of the samples is not strong, the real conditions of the scrap iron pieces cannot be accurately reflected, and the value of the scrap iron pieces deviates from the objective evaluation of the value of the whole scrap iron pieces. Furthermore, in order to improve the accuracy of the evaluation result, a large amount of the material sample is generally sucked.

At present, an electromagnetic chuck sampling mode is generally adopted, materials are sucked by magnetic force generated by the end face of the electromagnetic chuck, and if more material samples need to be sucked, a chuck with a larger end area is often needed; thus, the sucker cannot be fed into the material for sampling. Therefore, if the conventional electromagnetic chuck sampling method needs to enter the internal sampling, the end area of the chuck is required to be reduced, and the sampling amount is quite small, so that the sampling requirement cannot be met.

According to the sampling drill bit, the spiral piece barrel sleeve 1 is adopted, the electromagnet 2 is arranged in the inner cavity of the spiral piece barrel sleeve 1, and the drill bit 3 is installed at the front end of the spiral piece barrel sleeve 1; by using the form of the flight sleeve 1 and the drill bit 3, the deep-level interior of the material can be easily sampled. During the sample, can make flight barrel casing 1 and drill bit 3 rotate together and bore into the thing of being sampled with the sampling drill bit, make the surface of flight barrel casing 1 produce magnetic force through electro-magnet 2, absorb the material through the surface of whole flight barrel casing 1.

Adopt above-mentioned structure, if the sample volume of needs is more, only need increase the length of flight barrel casing 1 can, need not to increase the diameter of flight barrel casing 1, can not increase the resistance that the sampling drill bit got into the material inside, the sampling drill bit still can get into the material inside easily and take a sample. After the sample is accomplished, take out the sampling drill bit and shift to appointed discharge position, then cut off the power supply to electro-magnet 2, the sample that adsorbs on flight barrel casing 1 surface can fall down. The sampling drill bit is simple in structure and convenient to operate, and the problems that an existing electromagnetic chuck sampling mode cannot enter the internal sampling of materials, and the sampling quantity is small are well solved.

Preferably, the spiral sheet cartridge 1 is made of a magnetically conductive material (e.g., iron).

Further, through the form that adopts flight barrel casing 1 and drill bit 3, though can get into the inside sample of material, when the sample, meet bold scrap iron or foreign matter, the sampling drill bit is blocked by the hard thing of material easily and the phenomenon of dying appears stinging, leads to the sampling drill bit to appear damaging or breaking phenomenon.

In order to solve the above problem, referring to fig. 1, in the present embodiment, the drill 3 is preferably an eccentric drill, i.e. the center of the drill 3 is not coincident with the rotation center of the spiral piece sleeve 1, and has an offset (see e in fig. 1). So set up, adopt eccentric structural style with drill bit 3, when 3 contact materials of drill bit, can produce certain centrifugal force, prevent that drill bit 3 from appearing being blocked and stinging the dead condition, avoid the sampling drill bit to appear damaging or rupture phenomenon.

Referring to fig. 1, in the present embodiment, a drill bit connector 4 is further connected to the rear end of the flight casing 1, and the drill bit connector 4 is connected to a rotating shaft of a motor 5. In traditional steel scrap iron bits sampling, often sample through artificial mode. The labor intensity is very high, the labor cost is also very high, and the possibility of fraud exists in manual sampling. The invention drives the spiral piece barrel sleeve 1 and the drill bit 3 to rotate through the motor 5, absorbs materials through magnetic force when the electromagnet 2 is electrified, and demagnetizes and unloads when the electromagnet is powered off, thereby completely meeting the requirements of automatic equipment, having short unloading and taking time, being capable of matching with the automatic equipment (for example, the sampling drill bit can be assembled on a sampling lifter), realizing unattended full-automatic operation and replacing the mode of manual sampling. The sampling drill bit can greatly reduce the sampling labor intensity, save the labor cost and improve the sampling efficiency.

The working principle of the sampling drill of the present invention, which is mounted on the sampling lifter (performs up-and-down movement), will be explained as follows:

the sampling drill bit descends along with the sampling lifter, when a sampled object is close to, the motor 5 is used as a driving source, and the drill bit connector 4 drives the drill bit 3 and the spiral piece barrel sleeve 1 to rotate together; due to the spiral structure of the drill bit 3 and the adoption of eccentricity, the sampling drill bit can enter the deep layer of the sampled object and cannot be seized by seizure;

when the drill bit 3 and the spiral piece cylinder sleeve 1 reach the designated depth, the rotation is stopped, the electromagnet 2 in the inner cavity of the spiral piece cylinder sleeve 1 is electrified, magnetic force is generated on the cylindrical surface of the spiral piece cylinder sleeve 1, and a sample substance is adsorbed on the outer surface of the spiral piece cylinder sleeve 1 through the magnetic force;

then, the sampling lifter rises to leave the sampled object, when the sampled object reaches the specified unloading position, the electromagnet 2 is powered off, the helical sheet cylinder sleeve 1 is demagnetized, and the substance adsorbed on the cylindrical surface of the helical sheet cylinder sleeve 1 falls down due to gravity, so that the unloading is completed; and sampling again, and so on until the sampling of all samples is completed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. For example, the surface of the flight cartridge 1 may be not only a cylindrical surface but also a polygonal surface and the like. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.