RU2267766C1 - Device for sampling loose materials - Google Patents

Abstract

FIELD: investigating or analyzing materials.

SUBSTANCE: device comprises sampler made of a pipe provided with the slot, screw that is made in the sampler and provided with the drive and reduction gear, and accumulating tank. The sampler is made of a housing having nozzle provided with the top charging groove. The nozzle has bottom long discharging groove shifted to the reverse screw whose number of turns decreases in the sampling part. The bottom discharging groove is provided with the gate that controls its sizes. The accumulating tank is made of a sleeve with bent sides to provide slides. The control unit is made of the suspended box that receives electrical units and control circuits.

EFFECT: enhanced reliability.

4 dwg

Description

The invention relates to the field of automation of sampling of bulk materials (raw flour, cement, etc.) from pipelines with a free-falling flow and is used in automated systems for analytical control of the composition and properties of these materials and their laboratory analysis.

A device for sampling bulk material from a freely falling stream, which contains a housing with outlet and inlet openings, a sampling impeller with blades mounted on it on the shaft, and a sampling outlet pipe from the housing (see AS USSR No. 1555642, class G 01 N 1/20, 1990).

The disadvantage of this device is its complexity, bulkiness, the presence in it of two wheels with blades mounted with an axis perpendicular to the direction of material flow, three shafts, bevel gears and a screw. The device does not have reliable sampling.

A known device for sampling from a freely falling stream of bulk material containing a housing with inlet and outlet openings and a sampling impeller with blades mounted in the housing on a hollow shaft for passage through its cavity of a sample to be taken, while the blades are screw-shaped and oriented with sharp cavities angle to the direction of flow of bulk material, and in the shaft holes are made for communication with the pipeline for sampling (see RF patent No. 2118812, CL G 01 N 1/20, 1993).

A disadvantage of the known apparatus is that the device is not intended for sampling moisture-containing bulk materials (cement, gypsum) and does not have reliable sampling.

A device for sampling bulk materials, containing a sampling device with a pneumatic and electric drive, containing a pneumatic cylinder, where at the end of the rod is a sample probe, which represents a tank without a bottom, the role of which is played by the wall of the guide tube. The vertical position is ensured by pins located in the groove of the pipe. At the end of the pipe, the groove goes to the slot. Air enters the left cavity of the pipe. The right cavity of the pipe is connected to the atmosphere. A piston moves the sampler through the pipe from the slot with a rod. With the frontal part of the wall, the sample inlet discharges material into the pipe into estrus. With a reverse stroke, the sample inlet is aligned with the hole in the pipe. The rear wall of the inlet strikes against the drummer, and the sample pours out into a mug (see the USSR Ministry of Construction Materials Industry. Sampler PSS-3. Glavvostokcement and VNPO Soyuzavtomatstrom).

The disadvantages of the existing sampler are that it does not ensure uniformity and uniformity of material sampling, operational information on the operation of the sampler, and sufficient safety for maintenance personnel in difficult production conditions (large temperature fluctuations, inhomogeneity, humidity, etc. of materials).

A device for collecting average samples of bulk materials in a stream is known, including a sampler made in the form of a pipe with several longitudinal slots, a screw and a drive with a reducer placed in it, and the device is equipped with a mixer-divider connected to the sampler pipe and storage capacity (see RF patent No. 1422072, CL G 01 N 1/20, 1987, prototype).

The disadvantage of this device is that it is designed for discrete sampling and is not intended for sampling wet bulk materials. Excess grain must be transported to the stream. Fan required. Loading is only from vertical flow. The complexity and unreliability of the design. It does not provide security. The presence of foreign matter leads to emergency situations.

The purpose of the invention is to increase the reliability of the device and safe, high-quality sampling.

The problem is solved in that the sampling device for sampling bulk materials, including a sampler in the form of a pipe with a slot, an auger with a drive and a reducer placed in it, and a storage tank, has a sampler, which is made in the form of a housing on which a nozzle with a top loading wrap a groove that allows you to move the loading groove within 45 degrees in the frontal plane, ensuring feed perpendicularity and rotation, as well as a stable flow and transportation of material in takan. At the same time, a lower discharge groove is made in the nozzle, which has a large length shifted towards the screwless part of the screw, and the screw is made with a reduced number of turns in the sampling part to prevent thrombosis and inhomogeneous material entering the sampler. Reversible auger creates a separation of the incoming material by specific gravity. The presence of various inclusions leads to accidents. The lower discharge groove is equipped with a shutter, which makes it possible to adjust its size and sampling performance. Travel switches are equipped with wheels that draw the glass runners and exclude the sampler in the absence of a glass. In addition, a sampling device for sampling bulk materials containing a sampler includes a control unit, which is specially designed for cement, raw flour and gypsum, and provides sampling for laboratory analysis based on their production flow chart. Thus, the claimed technical solution meets the criteria of the invention of "novelty."

The sampling device for sampling bulk materials allows you to adjust the nozzle position of the loading groove relative to the direction of flow of the material in the discharge chute. The reduced number of turns on the reversing screw in the sampling part of the nozzle eliminates the ingress of inhomogeneous material with different gravitational forces, since the feed material is separated by specific gravity to remove inclusions that exceed the specific gravity of the sample taken (removal of metal inclusions that damage the housing). The device is characterized by a wide range of regulation of the volume of supplied material, the time of sampling with light and sound alarm, as well as the termination of the supply of the sample in the absence of a sampler cup.

The sampling device for sampling bulk materials holds large fluctuations of minus and plus temperatures, inhomogeneity and humidity of the material in difficult production conditions, and also ensures uniformity and uniformity of sampling of the material and low vibration resistance, timely information about the operation of the sampler, as well as the safety of maintenance personnel.

The analysis of known technical solutions in the studied area, that is, automation of sampling of bulk materials including quick-setting (raw flour, cement, gypsum), and other areas allows us to conclude that there are no signs in them that are similar to the distinctive features in the inventive sampling device for sampling of bulk materials and recognize that the inventive device meets the criteria of the invention "significant differences".

The invention is illustrated by drawings.

Figure 1 shows a General view of the device.

Figure 2 is a side view, view B.

Figure 3 is a top view.

Figure 4 - cooler and view A.

A sampling device for sampling bulk materials consists of two units: a sampler and a control unit, electrically connected to each other. The sampler consists of a housing 1, a nozzle 2, an upper groove 3, a lower groove 4, an unloading chute 5, a locking lock nut 6, a shutter 7, which is fastened with screws 8, a can 9 with curved side walls, a can cover 10, and runners 11 - curved side walls cup 9 (figure 2), which raise the wheels 12 (figure 2), the switch track 13 (figure 2), the strap body 14, stopper 15, the reversing screw 16, the front end of which rests on the front sleeve 17, and the other end it rests on the rear sleeve 18, which is a support for the shaft 19, gearbox 20 (figure 2), electric engine 21 and cooler 22 (Fig. 4), a control unit 23 (not indicated in the drawing), a pin 24, a locking ring 25, a flange of the housing 26, an arm 27, a clamp 28, a flange 29 of the discharge chute 5, an axis of the stopper 30.

The control unit 23 is made in the form of a hanging box (not indicated in the drawing), where electrical elements, control circuits designed for the sampler are located. The sampler supply path is a reversible screw 16 in the nozzle 2. An unloading estrus is a limited space in the form of a pipe through which the flow of material (raw flour, cement, gypsum, etc.) leaves at the end of the process.

The sampler is mounted as follows: it is fixed in the working position to the flange 29, which is welded to the wall of the unloading estrus 5. The seal of the entry point of the sampler with the flange 29 is carried out by laying rubber or asbestos, depending on the temperature of the material being sampled. One-off samples are taken from the material flow passing in the unloading chute 5, which are accumulated in the sample collector - glass 9. As a sample collection, the container included in the sampler kit - glass 9 can be used.

A nozzle 2 is screwed onto the body 1 of the sampler, which makes it possible to adjust the position of the upper groove 3 in the discharge chute 5 relative to the direction of flow. The design of the nozzle 2 with the upper loading groove 3 allows you to move the loading groove 3 within 45 degrees in the frontal plane, providing a stable flow and transportation of material into the glass 9. After installing the upper groove 3 in the desired position, the nozzle 2 is fixed with a lock nut 6 screwed onto the threaded part of the housing 1. The size of the lower groove 4 of the nozzle 2 in comparison with the upper groove 3 is increased and shifted towards the orbit part of the reversing screw 16, which excludes the ingress of inhomogeneous material with different gravitational force in the supply path, as well as cleaning the sampler after taking the sample during reverse operation of the electric motor 21. The lower groove 4 is regulated by the shutter 7 depending on the size of the required volume of material taken per sample per unit time. The damper 7 is fastened with two screws 8, which serve as guides for it when adjusting the size of the lower groove 4.

The sampler kit includes two glasses 9 for alternate replacement. To install the glass 9, it is necessary to rotate the stopper 15 by rotating the axis 30, hang the glass 9 with curved side walls onto the cover 10, while the runners 11 - the curved side machines of the glass 9 (Fig. 2) press the wheels 12 (Fig. 2) of the travel switches 13 (figure 2), fastened with screws to the strips 14 (figure 1) of the housing 1.

Way switches 13 exclude the operation of the sampler in the absence of a glass 9 for sampling.

The stopper 15 eliminates the possibility of dropping the glass 9 from the cover 10 during vibration.

In the housing 1 of the nozzle 2 there is a reversing screw 16 connected to the electric motor 21 by a pin 24, which is fixed by a locking ring 25. The front end of the reversing screw 16 is supported by the front sleeve 17, pressed into the nozzle 2. The other end of the reversing screw 16 is supported by the rear sleeve 18, which is also supporting for the shaft 19, gearbox 20, electric motor 21. The reversing screw 16, leaning on the sleeve 17, 18, during rotation slides along them like bearings.

The electric motor 21 is attached with a sleeve back 18 to the flange 26 of the housing 1 of the sampler.

To install the sampler in the discharge chute 5, a hole is made and a flange 26 with studs is welded.

The sampler is inserted into the unloading chute 5 until it stops, putting the flange of the housing 26 on the pin and fixed with a nut (not indicated in the drawing). Between the flanges of the housing 26 is a gasket. When using the sampler at high temperatures, the gasket is made of asbestos cardboard.

An arm 27 for supporting the motor 21 is welded to the body 1 (in place). The motor 21 is fastened to the arm 27 by a clamp 28 with rubber gaskets. The grooves of the clamp 28 are worn on the eyes of the electric motor 21, fixing it on the bracket 27.

When the electric motor 21 is operating under high temperature and stress conditions (with an increase in the volume of sampled material and the frequency of the electric motor to be switched on), a cooler 22 (Fig. 4) is provided, consisting of two sidewalls (not indicated), covering the cylindrical surface of the electric motor 21. screws. A heat-conducting silicone paste is applied between the electric motor 21 and the sidewalls.

The control unit is a hinged-type box, where the electrical elements of the control circuit are located: 24 V DC motors, step-down transformer, rectifiers, circuit breakers, time relays, intermediate relays, signal lamps and control keys (not marked).

The control unit is designed for cement, gypsum production technology and provides sampling for laboratory analysis based on the production flow chart.

When the sampler is turned on, the motor is turned on by rotating the reversing screw forward. In this case, the sampler supply path is cleaned of the material of the previous sample and other foreign inclusions and released into the unloading estrus. When there are foreign inclusions in the sampler’s supply path, the reversing auger is braked and the motor automatically turns off.

After cleaning is completed, the motor starter is turned on and the screw is reversed, the cup 9 starts loading with a new fresh breakdown. The material loading time is determined by the time relay. After filling the glass 9, the sample is turned off.

If no one came for the breakdown, then sound and light signals are turned on and transmitted to the laboratory. The circuit turns off after removing the glass. When replacing a filled glass with an empty one, the circuit is automatically included in the work.

Claims (1)

A sampling device for sampling bulk materials, including a sampler in the form of a pipe with a slot, an auger with a drive and a reducer placed in it, a storage tank, characterized in that the sampler is made in the form of a housing on which a nozzle with a top loading groove is wound, making it possible to adjust the position it is within 45 ^° , while the nozzle has a lower discharge groove, which has a large length, shifted towards the turn-free part of the reversing screw, where the reversing screw is made crazy a smaller number of turns in the sampling part to prevent ingress of inhomogeneous material with different gravitational forces, in addition, the lower discharge groove is equipped with a shutter that regulates its size, and the storage tank is made in the form of a glass with curved side walls-runners, meanwhile the track switches are equipped with wheels which are pressed by the runners of the glass and exclude the sampler in its absence, and the control unit is made in the form of a hanging box, where the electrical elements are located a control circuit.

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