JP2768367B2 - Bulk material hydraulic transport equipment - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates generally to hydraulic means for transporting materials, and more particularly to a bulk material hydraulic transport device.

The present invention is suitable for use in mining, civil engineering, metallurgy and agriculture for the hydraulic transport of bulk material over long distances.

Of particular interest are the hydraulic transport of bulk materials, such as mineral raw materials, beneficiation when excavating sand ore formations by open pit and underground mining, and the construction of hydropower structures.

[Conventional technology and problems]

The purpose of using a bulk material hydraulic transport device is a fundamental problem, namely, to prevent the particles to be transported from contacting the movable member and the flow member of the pressurizing unit and causing the wear thereof, and to replace the low pressure suction dredge pump. This is in resolving the problem of using a powerful water pump.

Long-range bulk material hydraulic transport requires an intermediate pumping station in principle. However, instead of such a station, it is possible to use a series of alternatingly operated bulk material hydraulic transport devices, with several water pumps operating in parallel for each device if necessary.

Thus, the distance over which bulk material is transported using such a device depends primarily on the strength characteristics of the device.

In addition, such devices must accommodate various requirements that are determined by the specificity of their operation and affect their reliability and economy. One of the most important requirements is the reliable operation of the device to prevent blockage or snagging of the solid material being processed in the chamber of the device,
Such an operation depends on the discharge method and discharge direction obtained by the arrangement of the discharge pipe of the apparatus.

That is, the dredge pump is capable of transporting the entire amount of bulk material to be processed with a relatively uniform slurry density, but each component of the device is in principle a so-called "dead zone", i.e. a certain amount of bulk after discharge. This indicates a phenomenon in which material remains in the chamber, or a phenomenon in which a certain amount of treated water is present in the chamber when the chamber is filled with loose material but not completely. If bulk materials of different qualities and compositions are inserted into the chamber during the processing cycle, the ejection of the materials is also carried out non-homogeneously without averaging the materials, which has a negative effect on the operational stability of the device.

Known slime hydraulic transport device (USSR patent invention specification No.
252,208) includes a set of spherical chambers, each chamber comprising a pressure fluid inlet tube, a liquid outlet tube, a bulk material outlet tube, and a slurry outlet tube, each of which is connected to a respective pipeline. Communicate. The pressurized liquid inlet and outlet pipes are located at the top of the chamber, while the other two pipes are located at the bottom of the chamber with a flexible diaphragm interposed between them. It is configured to drain excess liquid as it is filled and to force the slurry down into the respective pipeline.

The spherical chamber of said plant distributes stress evenly in the wall during the rolling operation. However, having four holes in these chambers to hold the pipe and two other holes to attach the flexible diaphragm by flanges greatly affects the safety limits of the chamber. . Deploying a flexible diaphragm in the chamber limits the pressure of the effluent stream due to the low strength characteristics of such a diaphragm, which reduces the slurry transport limit. The very limited possibilities of manufacturing large volume spherical chambers result in local stress concentrations in the places holding the tube and the diaphragm, since they require a large number of switching operations.

Placing bulk feed and slurry drains at the bottom of the chamber determines bulk material loading into the countercurrent zone, which results in extra head loss and power consumption, and also reduces material downstream from the chamber. Draining promotes blockage of the tube.

The presence of a "dead zone" filled with liquid at the top of the chamber after the bulk material has been filled into the chamber affects the operating efficiency of the entire plant.

Another known bulk material hydraulic transport device (SU, a, 912, 612) includes a vertical chamber having a cylindrical side wall, a cover, and a bottom, which chamber is used to load bulk material into the chamber. A pressure liquid inlet pipe discharged from the chamber;
A bulk material inlet tube, and a slurry upflow outlet tube coaxially disposed within said bulk material inlet tube, said tube being positioned coaxially with the longitudinal axis of the chamber and covering the chamber. And some of these tubes are placed in the chamber.

In the above-mentioned apparatus, the pressure liquid inflow pipe and the slurry upward flow discharge pipe are unified into a single pipe acting alternately. In addition, this chamber is a "dead zone" of bulk material at its bottom
And a resilient sphere fixed in the chamber cover for transmitting discharge pressure during discharge of the slurry.

Said chamber configuration shows only low safety limits.
Two holes for attaching the tube and two other holes for securing the bypass tube adversely affect the strength characteristics of the chamber and therefore reduce the slurry transport limit. The deployment of resilient spheres adds to the transfer pressure and thus limits the slurry transport limit. Furthermore, the spheres tend to be sucked into the slurry upflow outlet. Alternatively, deployment of such a sphere creates another type of "dead zone" in the chamber. That is, a certain amount of treated water remains, which reduces the chamber drainage time and thus increases the number of switching operations. This adversely affects the strength characteristics of the chamber. Also, the deployment of the spheres results in a low density of the slurry being transported, which is explained by the structure of the dredge pump and the rapid fluctuation of the density during the working cycle.

Further, the above-mentioned apparatus is complicated in its manufacturing process, assembling and mounting, and its practicality is low, and the insertion of the bulk material to be processed tends to be non-uniform, which is bad for the properties of the slurry. Affect.

[Objects and effects of the invention]

The present invention provides a bottom and cover configuration that increases the safety margin of the apparatus and lengthens the hydraulic transport distance, the arrangement of bulk material charging pipes, pressure liquid inlet pipes, liquid discharge pipes and slurry riser discharge pipes. The present invention provides a bulk material hydraulic transportation device having the following.

[Summary of the Invention]

The object includes a vertical chamber having a cylindrical side wall and a cover and a bottom, the vertical chamber providing a hydraulic fluid flow of a fluid discharged when bulk material to be processed is inserted into the vertical chamber. Having a pressure liquid feed pipe, a bulk material charging pipe, and a slurry rising flow discharge pipe, wherein the slurry rising flow discharge pipe is arranged concentrically inside the charging pipe, A bulk material hydraulic transport device, wherein the tube is disposed coaxially with the longitudinal axis of the vertical chamber and is secured to the cover, and wherein a portion of the tube is disposed within the vertical chamber; The cover and bottom are hemispherical, and the pressurized liquid inlet tube is held against the hemispherical cover and is coaxially arranged between the bulk material inlet tube and the slurry upflow outlet tube. , Also insert the liquid to be treated A liquid discharge pipe for extracting liquid from the vertical chamber when the liquid discharge pipe is fixed to the hemispherical cover and coaxially disposed outside the bulk material charging pipe. And a portion of the pressure fluid inlet tube is housed in the vertical chamber, and the length of the portion of the tube located in the vertical chamber increases from the liquid outlet tube to the slurry riser outlet tube. This is achieved by a bulk material hydraulic transport device characterized by the following:

According to the invention, the inlet opening of the slurry upflow discharge pipe is separated from the hemispherical bottom by a distance equal to at least 0.25d of the diameter d, and the outlet opening of the pressure liquid inlet pipe is the slurry upflow discharge pipe. Desirably, it is located above the inlet opening of the discharge tube and is spaced from the bottom of the hemispherical bottom by a distance not exceeding the length of its radius of curvature.

In the bulk material hydraulic transport device according to the present invention, the bulk material charging pipe includes a sealing element disposed at an upper end thereof outside the vertical chamber, and the introduction opening of the bulk material charging pipe is positioned on a side surface thereof; Desirably, the axis of this opening is offset with respect to the longitudinal axis of the bulk material loading tube to produce tangential feed of bulk material.

The bulk material hydraulic transport device according to the invention features a high safety margin, due to the uniform distribution of the effective stress over the volume of the vertical chamber having cylindrical sides and hemispherical bottoms and covers. Tube holding holes that produce local concentrated stress and are prone to fatigue failure under alternating loads (ie, charging and discharging pressures) are configured as simple holes, and these tubes are arranged symmetrically to each other and have a length The safety margins of the device are extended and the life of the device is extended since it increases from the outer tube to the inner tube, thus reducing the possible zones of dead zones and reducing the adverse effects of these zones. Thus, the increase in the strength characteristics of the device helps to extend the hydraulic transport distance.

Further, the apparatus of the present invention can remove bulk material to be processed from the entire volume of the chamber in a dense slurry without blockage, which means that the slurry is discharged as upflow and that the slurry is discharged as upflow. The inlet opening of the tube is spaced from the hemispherical bottom by a distance equal to at least 0.25d of its diameter d, and the outlet opening of the pressure liquid inlet tube is located above the inlet opening of the slurry riser outlet tube; Structure which is spaced from the bottom of the hemispherical bottom by a distance not exceeding the length of its radius of curvature. The gap between the bottom of the hemispherical bottom and the inlet opening of the slurry upflow discharge pipe is selected based on the requirement of equality of the flow rate through this gap and the flow rate through the slurry upflow discharge pipe. Due to the structure in which the outlet opening of the pressure liquid inlet pipe is arranged above the inlet opening of the slurry rising outlet pipe, most of the input liquid can be sent into the chamber to form a slurry therein, Therefore, the structure is such that the pressure liquid is prevented from being drawn out of the slurry rising flow discharge pipe, and the outlet opening of the pressure liquid supply pipe is separated from the bottom of the hemispherical bottom by a distance not exceeding the length of its radius of curvature. Further, it is possible to prevent the formation of the plug of the bulk material near the introduction opening of the slurry rising flow discharge pipe. Such plugs tend to be created by the diffusion of the pressurized liquid throughout the volume of the chamber past the inlet opening of the slurry upflow outlet.

The relative arrangement of the inlet and outlet openings of each tube prevents the formation of a dead zone in the form of a certain amount of non-dischargeable bulk material at the bottom of the chamber.

In this way, the effective use of the entire volume of the chamber makes it possible to counteract the effects of transitional states, such as discharge-load switching, associated with stress concentrations in the vicinity of the opening of the tube and in the fixed area of the tube.

Further, the apparatus of the present invention can obtain a slurry of stable quality by sending the bulk material tangentially through the annular gap between the bulk material charging pipe and the pressure liquid inlet pipe. Such a tangential feed of material prevents the formation of layers of differing quality and allows the bulk material to be evenly distributed throughout the cross section. This, in combination with the hemispherical shape at the bottom, can make the quality of the bulk material sent to the inlet opening of the slurry upflow discharge pipe uniform. The tangential feed of such slurry-like bulk material also minimizes the loss of bulk material through the drain. In this case, the bulk material is rapidly separated from the carrier liquid due to the centrifugal action and the promotion of sedimentation of the smallest particles of the bulk material. Furthermore, due to the opening angle of the liquid vortex at the outlet of the bulk material charging pipe and the length of the material slurry flow path inside the material charging pipe, the flow velocity of the charged material sharply decreases, And the reduction of entrainment of bulk material in the area.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

〔Example〕

The bulk material hydraulic transport device according to the present invention has a cylindrical side wall,
Vertical chamber 1 with hemispherical bottom 2 and cover 3
(FIG. 1). The vertical chamber 1 is provided with a loading / unloading unit 4 comprising a cover 3.
Comprises four tubes 5, 6, 7, 8 which are coaxially arranged along a longitudinal axis 9 with respect to each other. This pipe 5 is for discharging the processing liquid, that is, the processing water to be exchanged, and is provided at the upper end of the vertical chamber 1 with a sealing element arranged outside the chamber 1.
10 and contains a charging tube 6 of bulk material to be processed. The tube 6 has a sealing element at its outer end outside the chamber 1
11 and accommodates a pipe 7 for pressure fluid inflow. This tube 7 has at its outer end a sealing element 12 outside the chamber 1 and contains a tube 8 for discharging the slurry as an upflow.

In the structure of such a charging-discharging unit 4, the pipe
5, 6, 7 and 8 have different lengths of the portions arranged in the chamber 1, and each tube is configured to be long from the outside to the inside of these tubes so as to occur in a slurry production-hydrodynamic transportation process. Have been.

Pipes 5, 6, 7, and 8 are a discharge pipe 13, a bulk material charging pipe 14,
It communicates with a pressurized water conduit 15 and a main transfer pipeline 16.

In order to obtain a reliable and efficient operation of this bulk material hydraulic transport device, the tubes 7 and 8 are arranged along the practical length of the chamber 1 and the inlet opening of the tube 8 for discharging the slurry upward has a hemispherical bottom 2. from a distance h ₁ is spaced, the distance h _1, when the diameter of the tube 8 is d, equal to 0.25d, is greater than that, the outlet opening of the liquid inlet tube 7 of the tube 8 in the above the introduction opening, is spaced from the semi-spherical bottom part 2 by a distance h _2, the distance h ₂ is the radius of curvature of the hemispherical bottom 2 when the R, equal to R, is smaller than it.

In order to ensure uniform loading of the bulk material and to minimize the amount of bulk material particles discharged by the waste liquid discharge pipe 5, the introduction opening 17 of the bulk material charging pipe 14 is provided on the side of the charging pipe 14. Arranged, the axis 18 (FIG. 2) of this charging tube 14 is offset from the axis of the tube 6 (FIG. 1) which coincides with the longitudinal axis 9 of the chamber 1.

This bulk material hydraulic transport device is, in effect, part of a bulk material hydraulic transport plant. For continuous operation of this device, the plant comprises two or more of the above-mentioned devices, each device having a low lift suction through a bulk material charging pipe 14 equipped with a check valve 19 (FIG. 3). A drain pump 20, a drainage reservoir 22 through a drainage drain 13 with a gate valve 21 to prevent loss of bulk material to be treated, a high-lift pump 24 through a hydraulic fluid conduit 15 with a gate valve 23, and It must be connected to the main transfer pipe 16 equipped with a check valve 24.

〔motion〕

The bulk material hydraulic transport device according to the present invention operates as follows. The bulk material to be treated is in the form of a slurry and is filled with water by means of a low-lift suction dredge pump 20 (FIG. 3) through the bulk material charging pipe 6, respectively.
(Fig.). Under the action of gravity and the centrifugal acceleration action generated in the vortex of the liquid, the solids settle at the bottom of the chamber 1, and excess liquid is discharged through the drain pipe 5 and the drain pipe 13. This charging process continues until the bulk material fills the chamber 1 to the level of the discharge opening of the charging tube 6. At the end of the charging process, pipes 6 and 5 are shut off by check valve 19 (FIG. 3) and gate valve 21, respectively.
Next, the hydraulic fluid flow is sent by the high-lift pump 24 to the lower part of the chamber 1 in which the bulk material is loaded, through the respective hydraulic fluid supply pipes 7 (FIG. 1). As a result of the hydraulic action on the bulk material, the material particles are pulled away from the material mass and enter the slurry upflow discharge pipe 8 under high pressure, and these particles are further converted as slurry into the main transfer pipeline 11.
Will be transported along the required distance. In order to carry out the continuous hydraulic transport of the bulk material, the charging process and the discharging process occur alternately in each device of the plant.

Due to the structure of the pressure liquid inlet pipe 7 and the slurry riser pipe 8 as described above, a slurry forming step occurs near the bottom of the chamber 1,
The formed slurry is withdrawn from the bottom of the hemispherical bottom 2,
In this way, formation of a "dead zone" is prevented. As the evacuation process progresses, the bulk material in the chamber 1 sinks by its own weight without bridging,
It is brought equally into the inlet opening of the tube 8 from all sides. Due to the structure of the tubes 7 and 8 as described above, the hydraulic fluid is divided into three parts at the outlet area of the tube 7, most of the hydraulic fluid is used for slurry formation, and a second small part of the hydraulic fluid is It rises along the inlet pipe 7 to the upper part of the chamber 1 and replaces the bulk material to be discharged, and a third small part of the pressurized liquid is processed along the slurry rising flow discharge pipe 8 and this pipe 8 Rises in this tube 8 with slurry through the entrance of the main transfer pipeline
Since it enters the inside of the tube 16, wear of the end portion of the slurry upflow discharge pipe 8 is prevented.

〔The invention's effect〕

The bulk material hydraulic transport device of the present invention has high reliability and sand-
In the case of gravel material, a long transport distance (for example, 10 km) of a slurry having a density of 1.25 to 1.45 t / m ^{3 at} zero head can be generated. Since the loading and unloading of bulk material into and out of the processing chamber takes place over virtually the entire volume of the processing chamber, a high efficiency of the apparatus is obtained with a small number of switching operations.

In addition, this device can transport bulk material as a homogeneous slurry.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a bulk material hydraulic transport apparatus according to the present invention, and FIG. 2 is a cross sectional view of a bulk material charging pipe or a bulk material charging pipe having an opening for receiving material in a tangential direction. FIG. 3 shows a longitudinal section of a pipe, and FIG. 3 is a flow sheet of a bulk material hydro-transport plant including a two-stage apparatus according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Chamber 2 ... Bottom part 3 ... Cover 4 ... Charging-discharging unit 5 ... Liquid discharging pipe 6 ... Bulk material charging pipe 7 ... Pressure liquid inflow pipe 8 ... Slurry upflow discharge pipe, 16 ... Slurry transfer pipeline, 17 ... Inlet of bulk material charging pipe, 20 ... Drain pump, 22 ... Drainage reservoir, 24
…… High lift water pump.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventors Vladimir, Pavlovic, Dnepropetrovsk, Koval Soviet Union, Prospect, Kirova, 44, Karbe, 56 (72) Inventors Olga, Alexandruna, Luconina Moscow, Soviet Union , Uritsa, Malaya, Kardsskaya, 8, Karbe, 26 (72) Inventors Vladimir, Innokentiewich, Sokolov Dnepropetrovskaya, Soviet Union, Oblast, Bornogorsk, Uritsa, Stroeteley, 6, Karbe, 72) Inventors Bors, Alexandrowich, Martsev Soviet Union Dnepropetrovskaya, Oblast, Bornogorsk, Wu Tzua, Streutelei, 3, Kabea, 2 (56) References Japanese Patent Publication No. Sho 50-6717 (JP, B1) Japanese Patent Publication No. Sho 42-2530 (JP, B1) Real Public Showa No. 57-22794 (JP, Y2) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) B65G 53/00-53/66

Claims (3)

(57) [Claims] 1. A vertical chamber (1) having a cylindrical side wall and a cover (3) and a bottom (2), said vertical chamber being evacuated when the bulk material to be treated is loaded into said vertical chamber. A pressure liquid flow inlet pipe (7) for feeding a pressure liquid flow of the fluid into the vertical chamber, a bulk material charging pipe (6), and a discharge pipe (8) for the upward flow of the slurry. The slurry upflow discharge pipe (8) is arranged concentrically inside the charging pipe (6), said pipes (6,8) being arranged coaxially with the longitudinal axis (9) of the vertical chamber (1). A bulk material hydraulic transport device fixedly attached to the cover (3) so that a part of the pipe (6, 8) is disposed inside the vertical chamber (1); The cover (3) and the bottom (2) are hemispherical, and the pressure liquid flow material charging pipe (6) and the slurry A liquid outlet pipe (5) is arranged coaxially between the outlet pipes (8) and for extracting liquid from the vertical chamber (1) when inserting the liquid to be treated, said pipe (5) being provided. 5) is arranged coaxially outside the bulk material charging pipe (6) fixed to the hemispherical cover (3), and is provided with the liquid discharge pipe (5) and the pressurized liquid inflow pipe (7). The length of the part of the pipe (5,6,7,8) whose part is located in the vertical chamber (1) increases from the liquid discharge pipe (5) to the slurry upflow discharge pipe (8) A bulk material hydraulic transport device, comprising: 2. The introduction opening of the slurry rising flow discharge pipe (8) is
When the diameter is d, it is separated from the hemispherical bottom part (2) by a distance (h1) equal to or larger than 0.25d, and the outlet opening of the pressure liquid inlet pipe (7) is the above-mentioned slurry rising. It is arranged above the inlet opening of the flow discharge pipe (8) and is separated from the bottom of the hemispherical bottom (2) by a distance (h2) not exceeding the length of its radius of curvature (R). Claim 1
The bulk material hydraulic transport device according to claim 1. 3. The bulk material charging tube (6) is provided at its upper end with a sealing element (11) arranged outside the vertical chamber (1), and the inlet opening of the bulk material charging tube (6). 3. The arrangement as claimed in claim 1, wherein the opening is arranged on the side and the axis of the opening is offset with respect to the longitudinal axis of the bulk material charging pipe, resulting in a tangential feed of the bulk material. Rose material hydraulic transport equipment.