A hydraulic conveying device for solid particulate materials

Abstract

A hydraulic conveying device for solid particulate material includes a conveying pipeline and multiple pressure pumps connected to the conveying pipeline at intervals. Multiple guide blocks are provided at the bottom of the inner edge of the conveying pipeline, spaced apart along the length of the conveying pipeline. The guide blocks are wedge-shaped, with their wedge surfaces facing the direction of water flow. This device lifts solid particulate material in the water flowing through the guide blocks and prevents it from settling at the bottom of the inner edge of the conveying pipeline. This device can effectively reduce the accumulation and blockage of solid particulate material in the conveying pipeline and extend the cleaning and maintenance cycle.

Description

Technical Field

[0001] The invention relates to the field of hydraulic transportation, in particular to a hydraulic transportation device for solid particle materials. Background Art

[0002] The core of research into pipeline hydraulic conveying technology for solid particulate materials lies in the study of the dynamic characteristics of the conveying medium and the system's conveying parameters. Pipeline transport has been widely used to transport ores, solid waste, and other materials in numerous fields, including metallurgy, coal, chemical engineering, and water conservancy. Given my country's complex geographical environment and abundant mineral resources, the use of pipeline hydraulic transport for solid particulate materials is both resource-efficient and economical, safe, and environmentally friendly.

[0003] According to the basic principles of fluid mechanics, solid particles are transported in a suspended state within a pipeline. This is primarily due to the self-sedimentation of individual particles within the fluid flow, while being affected by gravity, buoyancy, and resistance. For horizontal transport, smaller solid particles are easier to transport hydraulically, placing specific demands on the hydraulic force. However, currently used DC slurry pipelines often require high flow rates to transport high-concentration materials. This causes high-density particles within solid particulate materials to settle more easily at the bottom of the pipeline. In the case of rough particle surfaces or non-circular, high-friction angles, a sedimentation effect can easily occur at the bottom of the pipeline, reducing the effective transport volume and even causing blockages. Cleaning the sedimented particles from the pipeline is time-consuming and labor-intensive. Summary of the Invention

[0004] The present invention aims to provide a hydraulic conveying device for solid particulate materials, which can effectively reduce the sedimentation and blockage of solid particulate materials in the conveying pipeline and extend the cleaning and maintenance cycle.

[0005] In order to solve the above technical problems, the specific solution adopted by the present invention is: a hydraulic conveying device for solid particulate material, including a conveying pipe and a plurality of pressure pumps connected to the conveying pipe at intervals, a plurality of guide blocks are provided at the bottom of the inner edge of the conveying pipe, and the plurality of guide blocks are distributed at intervals along the length direction of the conveying pipe, the guide blocks are wedge-shaped, and the wedge surfaces of the guide blocks are distributed facing the flow direction of the water body, so as to lift the solid particulate material in the water body flowing through the guide blocks upward and prevent the solid particulate material from being deposited at the bottom of the inner edge of the conveying pipe.

[0006] Preferably, an ejection hole penetrating the wedge surface and the base surface of the guide block is provided in the guide block.

[0007] Preferably, the ejection hole is a tapered hole, with the larger end distributed on the base surface of the guide block and the smaller end distributed on the wedge surface of the guide block.

[0008] Preferably, the small end face of the ejection hole is located on the wedge surface near the intersection of the wedge surface and the base surface.

[0009] Preferably, the end portion of the wedge surface of the guide block close to the base surface is tilted upward to form a terminal acceleration portion.

[0010] In the present invention, a plurality of wedge-shaped guide blocks are provided at intervals at the bottom of the conveying pipe. When the solid particulate materials pass through the guide blocks with the water flow, the water body at the corresponding position and the solid particulate materials in the water body are squeezed by the upper particles or settled under the influence of gravity due to their own large specific gravity. That is, the solid particulate materials obtain an upward component velocity and are lifted upward due to the guiding effect of the wedge surface of the guide block, and the upward component velocity continues to increase due to the flow cross section becoming smaller due to the gradual reduction of the gap between the wedge surface and the upper wall of the conveying pipe, thereby causing the corresponding solid particulate materials to be lifted up at high speed, and finally the present invention makes a On the one hand, by pushing the corresponding particulate materials upward, it is directly avoided that the above-mentioned solid particulate materials fall to the bottom of the conveying pipe quickly, come into contact with the bottom of the conveying pipe, and are deposited in combination with excessive friction or friction angle; on the other hand, the particulate materials that settle in the middle and lower part of the conveying pipe due to excessive specific gravity are easily pushed to fall on the surface of the conveying water flow after their own upward movement and the high-speed upward scouring force of the water flow, thereby being lifted upward by the buoyancy of the particulate materials with smaller specific gravity below, which further makes the particulate materials with excessive specific gravity not easy to settle and deposit at the bottom of the conveying pipe.

[0011] In a preferred embodiment of the present invention, an ejection hole is also provided within the guide block. One end of the ejection hole penetrates the wedge surface, allowing the high-speed water flow at the wedge surface to produce an ejection effect and rapidly extract the material in the ejection hole. The other end of the ejection hole penetrates the base surface, allowing some solid particulate material behind the base surface, which has settled due to the rapid widening of the flow channel and the slowing of the water flow rate caused by the water flowing through the guide block, to be ejected through the ejection hole and repass the guide block at high speed. This reduces the probability of solid particulate material settling and forming deposits behind the guide block base surface, further enhancing the present invention's effectiveness in alleviating or preventing blockages in the conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the cross-sectional structure of a delivery pipeline portion in one embodiment of the present invention;

[0013] Markings in the figure: 1, deceleration zone, 2, acceleration zone, 3, conveying pipeline, 4, wedge surface, 5, terminal acceleration part, 6, guide block, 7, ejection hole, 8, base surface. DETAILED DESCRIPTION

[0014] The hydraulic conveying device for solid particulate material of this embodiment is similar to hydraulic conveying devices in the prior art and includes a conveying pipeline 3 and a pressure pump spaced apart from the conveying pipeline 3. The starting end of the conveying pipeline 3 is connected to the solid material particle bin. The pressure pump pumps water into the conveying pipeline 3, and the flow of water along the conveying pipeline 3 enables long-distance conveyance of the solid material particles.

[0015] Different from conventional water transport devices, Figure 1 The bottom of the delivery pipe 3 of this embodiment is provided with an anti-blocking system, which includes a plurality of guide blocks 6 ( Figure 1 Only two are shown in the figure), and the guide pipes are spaced apart along the length of the conveying pipe 3. The guide blocks 6 lift the flowing water and solid material particles upward to reduce the probability of the solid particulate materials settling and depositing at the bottom of the conveying pipe 3, thereby effectively reducing the deposition and blockage of the solid particulate materials in the conveying pipe 3 and extending the cleaning and maintenance cycle.

[0016] All guide blocks 6 are wedge-shaped blocks of identical shape, each comprising a wedge surface 4, a base surface 8, and a bottom fixing surface. The bottom fixing surfaces of all guide blocks 6 are welded to the bottom of the conveying pipe 3, and the wedge surfaces 4 of all guide blocks 6 are oriented toward the flow direction A of the water within the conveying pipe 3. This arrangement results in the continuous narrowing of the cross-section of the flow channel formed between the wedge surface 4 and the top of the conveying pipe 3, accelerating the flowing water and the solid particulate matter within it. This results in an acceleration zone 2 formed above the wedge surface 4 of each guide block 6. The water flowing through the acceleration zone 2 and the settling solid particulate matter within the height range of the corresponding guide block 6 experience an upward component of velocity along the flow direction B. This component of velocity prevents the solid particulate matter from continuing to settle, directly preventing it from settling too quickly and causing deposition. After passing the end of the guide block 6, the solid particulate matter is flushed to the surface by the water. The upward force exerted by the low-density solid particulate matter prolongs its time and probability of settling to the bottom of the pipe, thereby slowing its deposition.

[0017] In this embodiment, the right end of the inclined surface of the guide block 6 is tilted upward to form an end acceleration portion 5, so that the cross-section of the flow channel at the end of the acceleration zone 2 is further rapidly narrowed, thereby further increasing the speed of flowing through the water body and solid particulate materials, ensuring that the settled solid particulate materials are lifted up and jump to the surface of the water body.

[0018] Figure 1In the embodiment, after the water and solid particles pass over the guide block 6, the cross-section of the flow channel in the conveying pipe 3 is restored, resulting in a deceleration zone 1 on the right side of the base surface 8 of the guide block 6. To prevent some solid particles from settling rapidly due to the reduced water velocity in the deceleration zone 1, this embodiment further provides an ejection hole 7 on the guide block 6. The ejection hole 7 is a conical hole that passes through the wedge surface 4 and the base surface 8 of the guide block 6. Its large end is located on the base surface 8, which facilitates the absorption of more settled solid particles. Its small end is located near the top of the wedge surface 4. The high-speed water flowing through the small end of the ejection hole 7 produces an ejection effect on the water and solid particles in the ejection hole 7, causing them to flow back along the D direction to the tail of the wedge surface 4 of the guide block 6 and rise after being accelerated by the water, thereby preventing the solid particles in the deceleration zone 1 from settling and settling.

Claims

1. A hydraulic conveying device for solid particulate material, comprising a conveying pipe (3) and a plurality of pressure pumps connected to the conveying pipe (3) at intervals, characterized in that: A plurality of guide blocks (6) are provided at the bottom of the inner edge of the conveying pipe (3), and the plurality of guide blocks (6) are spaced apart along the length direction of the conveying pipe (3). The guide blocks (6) are wedge-shaped, and the wedge surfaces (4) of the guide blocks (6) are distributed in the direction of water flow, so as to lift solid particulate materials in the water flowing through the guide blocks (6) upward and prevent the solid particulate materials from being deposited at the bottom of the inner edge of the conveying pipe (3); The guide block (6) is provided with an ejection hole (7) penetrating the wedge surface (4) and the base surface (8) thereof; the ejection hole (7) is a tapered hole, with the larger end distributed on the base surface (8) of the guide block (6) and the smaller end distributed on the wedge surface (4) of the guide block (6); the end of the wedge surface (4) of the guide block (6) close to the base surface (8) is tilted upward to form a terminal acceleration portion (5).

2. The hydraulic conveying device for solid particulate materials according to claim 1, characterized in that: The small end face of the ejection hole (7) is located on the wedge surface (4) near the intersection of the wedge surface (4) and the base surface (8).

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