Blockage dredging device and method for pipeline for conveying ore pulp

Abstract

The invention relates to the technical field of pipeline dredging, and provides a pipeline blockage dredging device and method for conveying ore pulp, the pipeline blockage dredging device comprises a clear water pipe, an elbow joint and an ore pulp conveying pipe connected with the elbow joint, and a communicating pipe is arranged between the clear water pipe and the elbow joint for parallel communication; the dredging mechanism comprises a cleaning and scraping head, an axial flow impeller and a transmission connecting piece used for connecting the cleaning and scraping head and the axial flow impeller, the axial flow impeller is installed in the clear water pipe, and the transmission connecting piece extends into the elbow joint along the clear water pipe and the communicating pipe; water flowing in the clean water pipe drives the axial flow impeller, the transmission connecting piece and the scraping head to rotate synchronously. The dredging mechanism is driven to scrape scales on the inner wall while water flow is used for flushing, construction is convenient, and the blockage dredging effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline dredging, and in particular to a device and method for dredging a pipeline blockage for conveying ore slurry. Background Art

[0002] Slurry is a liquid mixture formed by adding water and other auxiliary materials to solid raw materials such as ore and mineral soil in order to extract target elements in industrial production. The slurry pipeline transportation method is a technology that crushes solids into powder particles, mixes them with an appropriate amount of liquid to form a slurry, and transports them over long distances through pipelines. In the process of pipeline transportation of tailings, pipeline blockage is often caused by slurry precipitation. In particular, scaling is easily formed at the elbow due to the reduction of flow rate, causing blockage and difficult to clear.

[0003] In the prior art, the solution to the blockage of pipelines is usually to first find the blockage point, disassemble the pipeline joints or cut the pipeline to clear the blockage. This unblocking method is labor-intensive, has great limitations, and has high safety risks. In addition, the method of cutting the pipeline not only causes irreversible damage to the pipeline, but also increases the difficulty of construction and affects the construction progress. At the same time, it is more difficult for conventional unblockers to clean elbow joints than straight pipe sections. Summary of the invention

[0004] The object of the present invention is to provide a device and method for clearing a pipeline blockage for conveying ore slurry, which can facilitate clearing the blockage without causing damage to the pipeline.

[0005] The present invention is achieved through the following technical solutions: a pipeline blockage unblocking device for conveying ore slurry, comprising a clean water pipe, a bend pipe joint and a ore slurry conveying pipe connected thereto, a connecting pipe is provided between the clean water pipe and the bend pipe joint for parallel communication; a unblocking mechanism, comprising a cleaning head, an axial flow impeller and a transmission connecting piece for connecting the cleaning head and the axial flow impeller, the axial flow impeller is installed in the clean water pipe, and the transmission connecting piece extends into the bend pipe joint along the clean water pipe and the connecting pipe; the water flow flowing in the clean water pipe drives the axial flow impeller, the transmission connecting piece and the cleaning head to rotate synchronously.

[0006] Furthermore, the cleaning and scraping head includes a connecting head, a chain and a scraping ring. The chain is provided with a plurality of chains evenly spaced around the surface of the connecting head, and the scraping ring is installed at one end of the chain.

[0007] Furthermore, the upper and lower ends of the axial flow impeller are rotatably connected to a first bracket and a second bracket respectively; the inner wall of the clean water pipe is provided with a slide opening arranged along its axial direction, and the slide opening is located above the connecting pipe, and the outer edges of the first bracket and the second bracket are adapted to fit into the slide opening, and the axial flow impeller is driven to float by the water flow.

[0008] Furthermore, the clean water pipe is arranged vertically, and a flow rate regulating valve is installed on the clean water pipe.

[0009] Furthermore, a magnetic metal is provided at the top of the first bracket, and an electromagnetic absorber is provided at the outside of the clean water pipe, and the position of the electromagnetic absorber corresponds to the top of the slide opening.

[0010] Furthermore, a plurality of balls are embedded and installed on the inner wall of the elbow joint, and a pressure sensor is installed on the inner wall of the elbow joint.

[0011] Furthermore, a one-way valve plate is provided inside the connecting pipe, and the upper end of the one-way valve plate is hinged to the top end of the connecting pipe. Water flows through the clean water pipe to flush open the one-way valve plate.

[0012] Furthermore, the diameter of the slurry conveying pipe is larger than the diameter of the elbow joint.

[0013] Furthermore, the transmission connecting member is a spring.

[0014] A method for clearing blocked pipes for conveying slurry based on the above-mentioned device comprises the following steps:

[0015] S1: Detect whether the pipeline is blocked. The pressure value at the elbow joint is monitored by the pressure sensor and fed back to the backend. If it is blocked, it means that the flow rate at the elbow joint is reduced and the pressure is increased, and the pressure value exceeds the limit;

[0016] S2: Control and close the slurry conveying pipe, and the slurry stops passing through the elbow joint;

[0017] S3: Lower the dredging mechanism, cut off the power to the electromagnetic absorber, and under the action of gravity, the axial flow impeller moves down to the lower end of the slideway, and the cleaning scraper presses against the valve plate;

[0018] S4: Open the clean water pipe to input water with a certain flow rate and pressure. Part of the water flows into the connecting pipe to flush the one-way valve plate, so that the transmission connector and the cleaning scraper head enter the elbow joint, and the water flow also drives the axial flow impeller to rotate;

[0019] S5: The flow rate of water in the clean water pipe is stabilized by the flow rate regulating valve, and the chain and scraper ring rotate and hit the scale layer on the pipe wall, and the clean water flow input from the connecting pipe is used for flushing and removal;

[0020] S6: The flow rate is adjusted by the flow rate regulating valve, and the flow rate is repeatedly increased and decreased alternately, so that the axial flow impeller moves up and down along the slideway repeatedly, driving the cleaning scraper to move back and forth in the elbow joint to dredge for a period of time;

[0021] S7: Reset, the electromagnetic absorber is energized with magnetic attraction, and the flow rate regulating valve increases the water flow rate again to rush the axial flow impeller to the top of the slideway. The electromagnetic absorber absorbs the axial flow impeller, and the axial flow impeller pulls the transmission connector and the cleaning scraper head back into the communicating vessel;

[0022] S8: Open the slurry conveying pipe and verify the pressure value data of the pressure sensor for re-inspection.

[0023] The technical solution of the present invention has at least the following advantages and beneficial effects:.

[0024] 1. The pressure value is monitored by the pressure sensor, and the dredging is performed autonomously without human intervention;

[0025] 2. The flow of clean water drives the axial flow impeller to provide power for the cleaning and scraping head. At the same time, it can also flush the elbow joints and flush the cleaned impurities down in time. The chain can adapt to the different sizes of the pipe during the swinging process and can fully contact the scale layers at various parts of the pipe wall, so the dredging and cleaning effect is good;

[0026] 3. By adjusting the water flow rate in the clean water pipe, the cleaning position in the elbow joint is changed. When the flow rate is large enough, the dredging mechanism can be automatically retracted into the connecting pipe and the clean water pipe, without adversely affecting the normal material transportation of the slurry conveying pipe and the elbow joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a pipeline blockage dredging device for conveying slurry provided in an embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the dredging mechanism in the present invention;

[0030] Figure 3 It is a cross-sectional schematic diagram of the axial flow impeller in the present invention in the clean water pipe;

[0031] Figure 4 It is a schematic diagram of the structure of the cleaning and scraping head in the present invention;

[0032] Figure 5 It is a schematic diagram of the structure when the dredging mechanism in the present invention is retracted into the connecting pipe and the clean water pipe.

[0033] Icons: 1-clean water pipe, 11-slideway, 2-elbow joint, 3-slurry conveying pipe, 4-dredging mechanism, 41-cleaning scraper head, 411-connecting head, 412-chain, 413-scraper ring, 42-transmission connecting part, 43-axial flow impeller, 431-first bracket, 4311-magnetic metal, 432-second bracket, 5-flow rate regulating valve, 6-electromagnetic adsorber, 7-connecting pipe, 8-one-way valve plate, 9-pressure sensor, 10-ball. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] The following is further described in conjunction with specific embodiments. Figure 1-Figure 5As shown, this embodiment is a pipe blockage dredging device for conveying slurry, comprising a clean water pipe 1, an elbow joint 2 and a slurry conveying pipe 3 connected thereto, a connecting pipe 7 is provided between the clean water pipe 1 and the elbow joint 2 for parallel communication; a dredging mechanism 4, which comprises a cleaning head 41, an axial flow impeller 43 and a transmission connecting member 42 for connecting the cleaning head 41 and the axial flow impeller 43, the axial flow impeller 43 is installed in the clean water pipe 1, and the transmission connecting member 42 extends into the elbow joint 2 along the clean water pipe 1 and the connecting pipe 7; the water flow in the clean water pipe 1 drives the axial flow impeller 43, the transmission connecting member 42 and the cleaning head 41 to rotate synchronously movement; specifically, there is a turning point at the elbow joint 2. When the conveying material usually passes through this place, its flow rate will decrease and the pressure will increase, which will cause scaling on the pipe wall. Therefore, when there is obvious blockage at the elbow joint 2, the continuous flow of water in the clean water pipe 1 will drive the axial flow impeller 43 to rotate, and then the transmission connecting part 42 will transmit this rotation to the front end of the cleaning head 41 to rotate, forming a swing similar to the end of a rope, so that the cleaning head 41 hits the scaling surface of the inner wall of the elbow joint 2 in a rotating state, and the high-pressure clean water entering the elbow joint 2 from the connecting pipe 7 is used to flush the matching part, thereby completing the blockage problem at the elbow joint 2.

[0038] Reference Figure 2 and Figure 4 As shown, the cleaning and scraping head 41 therein includes a connector 411, a chain 412 and a scraping ring 413. The chain 412 is provided with a plurality of chains evenly spaced around the surface of the connector 411, and the scraping ring 413 is installed at one end of the chain 412. Specifically, after scaling of the elbow joint 2, the apertures at various locations are inconsistent, and the flow rates of clean water are different. The chain 412 can be adapted to a wide range when it rotates. The unfolded length of the chain 412 is slightly larger than the radius of the elbow joint 2. The scaling layer is gradually beaten down by the beating and crushing of the scraping ring 413 and the chain 412, and the mixture is discharged along the other end of the elbow joint 2 in combination with high-pressure clean water flushing.

[0039] like Figure 2As shown, the upper and lower ends of the axial flow impeller 43 are rotatably connected with a first bracket 431 and a second bracket 432 respectively; the inner wall of the clean water pipe 1 is provided with a slideway opening 11 arranged along its axial direction, and the slideway opening 11 is located above the connecting pipe 7, and the outer edges of the first bracket 431 and the second bracket 432 are adapted to be snapped into the slideway opening 11 and slidably connected therewith, and the axial flow impeller 43 is driven to float by the water flow; the clean water pipe 1 is vertically arranged, so that the impact force of the water flow is different, and the buoyancy of the axial flow impeller 43 changes according to the gravity, and the clean water pipe 1 is installed with a flow rate regulating valve 5; specifically, by setting the first bracket 431 and the second bracket 432 to slide with the slideway opening 11, the axial flow impeller 43 can perform a linear motion while rotating, so when the flow rate of the water in the clean water pipe 1 changes, the axial flow impeller 43 repeatedly floats along the slideway opening 11, and the axial flow impeller 43 will pull the transmission connection 42, thereby cleaning the blockage of the elbow joint 2 with a wider coverage and a cleaner cleaning.

[0040] like Figure 1 and Figure 5 As shown, a magnetic metal 4311 is provided at the top of the first bracket 431, and an electromagnetic absorber 6 is provided on the outside of the clean water pipe 1, and the position of the electromagnetic absorber 6 corresponds to the top of the slideway opening 11; specifically, when the elbow joint 2 is cleaned, the axial flow impeller 43 moves to the top, so that the electromagnetic absorber 6 is energized to absorb it, and the axial flow impeller 43 drives the transmission connection 42 to pull the cleaning head 41 into the connecting pipe 7, so as to avoid the cleaning head 41 in the slurry conveying pipe 3, which will cause adverse effects on its normal conveying.

[0041] Reference Figure 1 As shown, a plurality of balls 10 are embedded and installed on the inner wall of the elbow joint 2, and a pressure sensor 9 is installed on the inner wall of the elbow joint 2; specifically, when the balls 10 come into contact with the slurry, they rotate to improve the smoothness inside the elbow joint 2, so that when the slurry passes through the elbow joint 2, its flow rate is relatively faster, the pressure here is relatively lower, it is not easy to be blocked, and the scaling speed is slowed down.

[0042] like Figure 5 As shown, a one-way valve plate 8 is provided in the connecting pipe 7, and the upper end of the one-way valve plate 8 is hinged to the top of the connecting pipe 7, and water flows in the clean water pipe 1 to flush the one-way valve plate 8 open; specifically, when the slurry conveying pipe 3 works normally, the slurry is prevented from entering the connecting pipe 7, and the one-way valve plate 8 is blocked. Only when water flows in the clean water pipe 1, a part of the water can flush the one-way valve plate 8 open, driving the cleaning scraper 41 to enter the elbow joint 2.

[0043] In addition, the diameter of the slurry conveying pipe 3 is larger than the diameter of the elbow joint 2. Specifically, the smaller the diameter of the conveying pipe, the flow rate at the elbow joint 2 can be increased to a certain extent, making it less likely to be blocked.

[0044] It should be noted that the transmission connector 42 uses a component with a certain degree of flexibility, such as a spring, so that when the axial flow impeller 43 rotates, it can be used in a bent state with the ability to rotate and deform, and the tail end scraper 41 can achieve the effect of swinging and hitting the scaling layer to clear it. In addition, a transmission connector 42 or a bicycle chain 412 formed by multiple small universal joints in series can also be used.

[0045] A method for clearing blocked pipes for conveying slurry based on the above-mentioned device comprises the following steps:

[0046] S1: Detect whether the pipeline is blocked, monitor the pressure value at the elbow joint 2 through the pressure sensor 9, and feed it back to the background. If it is blocked, it means that the flow rate at the elbow joint 2 is reduced and the pressure is increased, and the pressure value exceeds the limit;

[0047] S2: Control and close the slurry conveying pipe 3, and the slurry stops passing through the elbow joint 2;

[0048] S3: lower the dredging mechanism 4, cut off the power to the electromagnetic absorber 6, and under the action of gravity, the axial flow impeller 43 moves down to the lower end of the slideway opening 11, and the cleaning head 41 abuts against the valve plate;

[0049] S4: Open the clean water pipe 1 to input water with a certain flow rate and pressure. Part of the water flows into the connecting pipe 7 to open the one-way valve plate 8, so that the transmission connector 42 and the cleaning head 41 enter the elbow joint 2, and the water flow also drives the axial flow impeller 43 to rotate;

[0050] S5: The flow rate of water in the clean water pipe 1 is stabilized by the flow rate regulating valve 5, and the chain 412 and the scraper ring 413 are rotated and hit on the scale layer on the pipe wall, and the clean water flow input from the connecting pipe 7 is used for flushing and cleaning;

[0051] S6: The flow rate is adjusted by the flow rate regulating valve 5, and the flow rate is repeatedly increased and decreased alternately, so that the axial flow impeller 43 moves up and down repeatedly along the slideway opening 11, driving the cleaning head 41 to move back and forth in the elbow joint 2 to dredge for a period of time;

[0052] S7: Reset, the electromagnetic absorber 6 is energized with magnetic attraction, and the flow rate regulating valve 5 increases the water flow rate again to rush the axial flow impeller 43 to the top of the slideway opening 11, and the electromagnetic absorber 6 absorbs the axial flow impeller 43, and the axial flow impeller 43 pulls the transmission connector 42 and the cleaning head 41 back into the communicating vessel;

[0053] S8: Open the slurry conveying pipe 3, verify the pressure value data of the pressure sensor 9 and conduct a re-inspection, so as to achieve long-term use.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for clearing blocked pipes for conveying slurry, characterized by: It comprises a clean water pipe (1), an elbow joint (2) and a slurry conveying pipe (3) connected thereto, wherein a connecting pipe (7) is provided between the clean water pipe (1) and the elbow joint (2) for parallel communication; A dredging mechanism (4), comprising a cleaning head (41), an axial flow impeller (43) and a transmission connection member (42) for connecting the cleaning head (41) and the axial flow impeller (43), wherein the axial flow impeller (43) is installed in the clean water pipe (1), and the transmission connection member (42) extends into the elbow joint (2) along the clean water pipe (1) and the connecting pipe (7); The water flowing in the clean water pipe (1) drives the axial flow impeller (43), the transmission connection member (42) and the cleaning and scraping head (41) to rotate synchronously.

2. The device for clearing blocked pipes for conveying slurry according to claim 1, characterized in that: The cleaning and scraping head (41) comprises a connecting head (411), a chain (412) and a scraping ring (413); the chain (412) is provided with a plurality of chains evenly spaced around the surface of the connecting head (411), and the scraping ring (413) is installed at one end of the chain (412).

3. The device for clearing blocked pipes for conveying slurry according to claim 1, characterized in that: The upper and lower ends of the axial flow impeller (43) are rotatably connected to a first bracket (431) and a second bracket (432) respectively; The inner wall of the clean water pipe (1) is provided with a slide opening (11) arranged along its axial direction, and the slide opening (11) is located above the connecting pipe (7), and the outer edges of the first bracket (431) and the second bracket (432) are adapted to fit into the slide opening (11), and the axial flow impeller (43) is driven to float by the water flow.

4. The device for clearing blocked pipes for conveying slurry according to claim 3, characterized in that: The clean water pipe (1) is arranged vertically, and a flow rate regulating valve (5) is installed on the clean water pipe (1).

5. The device for clearing blocked pipes for conveying slurry according to claim 3, characterized in that: A magnetic metal (4311) is provided at the top of the first bracket (431), and an electromagnetic absorber (6) is provided outside the clean water pipe (1), and the position of the electromagnetic absorber (6) corresponds to the top of the slideway opening (11).

6. The device for clearing blocked pipes for conveying slurry according to claim 1, characterized in that: A plurality of balls (10) are embedded and installed on the inner wall of the elbow joint (2), and a pressure sensor (9) is installed on the inner wall of the elbow joint (2).

7. The device for clearing blocked pipes for conveying slurry according to claim 1, characterized in that: A one-way valve plate (8) is provided inside the connecting pipe (7), the upper end of the one-way valve plate (8) is hinged to the top end of the connecting pipe (7), and water flows through the clean water pipe (1) to flush open the one-way valve plate (8).

8. The device for clearing blocked pipes for conveying slurry according to claim 1, characterized in that: The diameter of the slurry conveying pipe (3) is greater than the diameter of the elbow joint (2).

9. The device for clearing blocked pipes for conveying slurry according to claim 1, characterized in that: The transmission connecting member (42) is a spring.

10. A method for clearing blocked pipes for conveying slurry according to any one of claims 1 to 9, the steps of which are as follows: S1: Detect whether the pipeline is blocked, monitor the pressure value at the elbow joint (2) through the pressure sensor (9), and feed it back to the background. If it is blocked, it means that the flow rate at the elbow joint (2) is reduced and the pressure is increased, and the pressure value exceeds the limit value; S2: Control and close the slurry conveying pipe (3), so that the slurry stops passing through the elbow joint (2); S3: lowering the dredging mechanism (4), disconnecting the power supply to the electromagnetic absorber (6), and under the action of gravity, the axial flow impeller (43) moves down to the lower end of the slideway opening (11), and the cleaning scraper (41) abuts against the valve plate; S4: Open the clean water pipe (1) to input water with a certain flow rate and pressure. Part of the water flows into the connecting pipe (7) to flush the one-way valve plate (8), so that the transmission connecting piece (42) and the cleaning scraper head (41) enter the elbow joint (2). The water flow also drives the axial flow impeller (43) to rotate; S5: The flow rate of the water in the clean water pipe (1) is stabilized by the flow rate regulating valve (5), and the chain (412) and the scraper ring (413) are rotated and hit on the scale layer on the pipe wall, and the clean water flow input from the connecting pipe (7) is used to flush and remove; S6: The flow rate is adjusted by the flow rate regulating valve (5), and the flow rate is repeatedly increased and decreased alternately, so that the axial flow impeller (43) moves up and down along the slideway opening (11), driving the cleaning head (41) to move back and forth in the elbow joint (2) to clear the blockage for a period of time; S7: reset, the electromagnetic absorber (6) is energized with magnetic attraction, and the flow rate regulating valve (5) increases the water flow rate again to rush the axial flow impeller (43) to the top of the slideway opening (11), and the electromagnetic absorber (6) absorbs the axial flow impeller (43), and the axial flow impeller (43) pulls the transmission connection member (42) and the cleaning head (41) back into the communicating vessel; S8: Open the slurry conveying pipe (3) and verify the pressure value data of the pressure sensor (9) for re-inspection.

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