CN111981235A - Damping device of cemented filling slurry conveying pipeline - Google Patents
Damping device of cemented filling slurry conveying pipeline Download PDFInfo
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- CN111981235A CN111981235A CN202010979293.8A CN202010979293A CN111981235A CN 111981235 A CN111981235 A CN 111981235A CN 202010979293 A CN202010979293 A CN 202010979293A CN 111981235 A CN111981235 A CN 111981235A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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Abstract
The invention relates to a damping device of a cemented filling slurry conveying pipeline, which is connected in series on the conveying pipeline and comprises a feed pipeline, a discharge pipeline, an annular closed shell, a water injection pipe, a buffer water storage cavity and an annular water injection channel, and is characterized in that: the feed pipeline constitute by big footpath straight tube section, reducing taper pipe section and path straight tube section concentric match connection in proper order, discharge conduit be the straight tube way, annular seal shell both ends respectively concentric suit and fix on feed pipeline and discharge conduit, constitute the buffering water storage chamber and the annular water injection passageway that communicate each other, water injection pipe and annular seal shell intercommunication, the clamp connection between pipeline and the fairing. The invention has the advantages that: the structure is simple and reasonable, water injection is uniform, the resistance of the pipeline is reduced, the conveying distance is prolonged, and the operation cost is saved; the abrasion of the pipeline is reduced, and the service life is prolonged; the water is injected in the same direction, so that the influence on the stability of the filling slurry is avoided, and the filling effect is ensured; the installation and the disassembly are convenient.
Description
Technical Field
The invention belongs to the technical field of mining filling systems, and particularly relates to a damping device of a cemented filling slurry conveying pipeline for mine filling, which can effectively reduce the resistance of the conveying pipeline, reduce the abrasion of the pipeline, prolong the conveying distance and avoid the damage to the stability of the filling slurry.
Background
The current mine filling system generally adopts high-concentration or pasty fluid cemented filling slurry for filling, and in order to reduce the production and operation cost, the gravity flow conveying is mostly adopted. When the horizontal pipeline is long and the gravitational potential energy generated by the vertical pipeline is not enough to offset the resistance of the filling slurry conveying pipeline, measures such as pressurization conveying by a filling pump or adding a drag reducer in the filling slurry are usually adopted, but the production and operation cost of the mine filling system is invisibly and greatly increased.
The patent that publication is CN 104763877A discloses a tail sand slurry body pipeline fairing, include the slurry body transition pipeline the same with the slurry body pipeline internal diameter and both ends are equipped with the ring flange respectively, slurry body transition pipeline periphery is equipped with annular closed shell, be equipped with annular baffle in the annular closed shell and separate into interior circumference flash chamber and periphery water storage chamber with the shell inner space, annular baffle is extended to the other end and is left the clearance by annular closed shell one end and with interior circumference flash chamber and periphery water storage chamber intercommunication, the water injection hole has been seted up to the position that slurry body transition pipeline corresponds interior circumference flash chamber, the water filling port has been seted up to the position that annular closed shell corresponds periphery water storage chamber, the water filling port passes through the water injection pipe and links to each other with pressure boost water supply system. The patent is suitable for a non-cemented tailing slurry (two-phase flow) conveying pipeline, and if the non-cemented tailing slurry (two-phase flow) conveying pipeline is applied to a cemented filling slurry (Bingham fluid) conveying pipeline, although a certain resistance reduction effect can be achieved, firstly, the center of a water injection port of the pipeline is only slightly lower than an annular partition plate, after water with pressure is injected through the water injection port, part of the water directly enters an inner peripheral flash cavity and does not pass through an outer peripheral water storage cavity, and the water flow is uneven; secondly, a plurality of water injection holes uniformly distributed on the transition pipeline are easily blocked by filling slurry; moreover, the water injection hole will press the water injection transition pipeline of area along the transition pipeline axial, forms the impact to filling the ground paste, and adopts the water injection hole water injection, and the water film of formation is inhomogeneous, seriously influences the stability of filling the ground paste.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the damping device for the cemented filling slurry conveying pipeline, which has simple and reasonable structural design and convenient and reliable use, and has the advantages of prolonging the conveying distance by reducing the conveying resistance, reducing the pipe wall abrasion, improving the conveying efficiency and avoiding damaging the stability of the filling slurry.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a damping device of a cemented filling slurry conveying pipeline, which is connected in series on the conveying pipeline and comprises a feed pipeline, a discharge pipeline, an annular closed shell, a water injection pipe, a buffer water storage cavity and an annular water injection channel, and is characterized in that: the feeding pipeline is formed by sequentially concentrically matching and connecting a large-diameter straight pipe section, a reducing conical pipe section and a small-diameter straight pipe section, the inner diameter of the large-diameter straight pipe section is the same as that of the conveying pipeline, an annular groove I for being connected with the conveying pipeline in a clamping manner is arranged on the outer wall close to the pipe orifice of the receiving end part of the large-diameter straight pipe section, the outer diameter of the small-diameter straight pipe section is smaller than the inner diameter of the conveying pipeline, and the small-diameter straight pipe section; the discharge pipeline is a straight pipeline with the same inner diameter as the conveying pipeline, an annular groove II for being connected with the conveying pipeline in a clamping manner is arranged on the outer wall close to the pipe orifice of the discharge end part of the discharge pipeline, the annular closed shell comprises an annular top plate, an annular bottom plate and a shell pipe, wherein the inner ring of the annular top plate is concentrically sleeved and fixed at the joint part of the small-diameter straight pipe section and the reducing conical pipe section on the feeding pipeline, the inner ring of the annular bottom plate is concentrically sleeved and fixed on the discharging pipeline, one end of the outer shell pipe is concentrically and fixedly connected with the outer ring edge of the annular top plate, the other end of the outer shell pipe is concentrically and fixedly connected with the outer ring edge of the annular bottom plate, a water injection port is arranged on the outer shell pipe close to the annular bottom plate, one end of the water injection pipe is connected with the water injection port, an annular groove III is formed in the outer wall of the pipe orifice at the other end of the water injection pipe and connected with an external water supply system pipeline through the annular groove III in a clamping mode;
the buffer water storage cavity is formed by a space between the inner wall of the shell pipe and the outer wall of the discharge pipeline;
the annular water injection channel is formed by a space between the outer wall of the small-diameter straight pipe section and the inner wall of the discharge pipeline;
a gap is reserved between the annular top plate and the pipe orifice at the feeding end of the discharging pipeline, so that the buffering water storage cavity is communicated with the annular water injection channel.
The groove width W1, the groove depth H1 and the distance L1 between the groove edge and the end of the pipe orifice of the annular groove I and the annular groove II are respectively determined according to the pressure grade of the conveying pipeline in which the annular groove I and the annular groove II are positioned; the groove width W2, the groove depth H2 and the distance L2 between the groove edge and the end of the nozzle of the annular groove III are determined according to the pressure grade of the external water supply system pipeline.
Preferably, the length L of the small-diameter straight pipe section inserted into the discharge pipeline is 50-100 mm.
Preferably, the distance between the annular top plate and the annular bottom plate of the annular closed shell is more than or equal to 4 times of the inner diameter of the water injection pipe, and the distance between the central line of the water injection pipe and the annular bottom plate is 0.5-1.5 times of the inner diameter of the water injection pipe.
Preferably, the width of the annular water injection channel is 1-2 mm.
Preferably, the width of the buffer water storage cavity is 2-4 mm.
Preferably, the gap between the pipe orifices at the inlet and the upper ends of the discharge pipelines of the annular top plate is the thickness of the annular top plate plus 1-2 mm.
Preferably, a filter is further arranged on the water injection pipe, and the filtering precision is 50-100 meshes.
Brief introduction of mechanism for reducing resistance of filling slurry conveying pipeline
1. An annular cavity water film which flows uniformly is formed on the periphery of the inner wall of the discharge pipeline
Water of an external water supply system enters the buffer water storage cavity after passing through the water injection pipe, and overflows to the annular water injection channel through a gap between the annular top plate and the pipe orifice at the upper end of the discharge pipeline to form an annular cavity-shaped water film which uniformly flows along the periphery of the inner wall of the discharge pipeline and the periphery of the outer wall of the small-diameter straight pipe section;
2. the annular water film wrapped filling slurry flows in the conveying pipeline
When the filling slurry flows through the reducing conical pipe section of the feeding pipeline, the filling slurry forms full pipe flow, and is gradually reduced and pressurized, and when the filling slurry enters the discharging pipeline, the space between the filling slurry and the peripheral inner wall of the discharging pipeline is filled with the annular cavity-shaped water film; namely, the annular water film covers the peripheral inner wall of the discharge pipeline, and the filling slurry is not contacted with the peripheral inner wall of the pipeline and is wrapped by the annular water film; and then, the annular cavity-shaped water film wrapping is carried out along with the self-flowing conveying of the cemented filling slurry to the downstream pipeline until the annular water film gradually disappears. Therefore, during the existence of the annular cavity-shaped water film, the friction coefficient between the filling slurry and the pipe wall is reduced, the conveying resistance of the filling slurry is reduced, the conveying distance of the filling slurry is prolonged, and the abrasion degree of the pipeline is reduced.
Compared with the prior art, the invention has the beneficial effects that:
1. the structure is reasonable, the water flow entering the annular water injection channel is ensured to be uniform, and the possibility of blockage of the water injection channel does not exist;
2. the outflow direction of the annular water injection channel is the same as the flow direction of the cemented filling slurry, and under-pressure water does not impact the slurry, so that the stability of the filling slurry is ensured;
3. an even and stable annular water film can be formed, the conveying resistance of the cemented filling slurry is effectively reduced, the pipeline abrasion is reduced, the conveying distance is prolonged, and the operation cost is saved;
4. each mouth of pipe of charge-in pipeline and ejection of compact pipeline all adopts slot type clamp connection, and just the same with pipeline's pipe diameter, and the installation is dismantled conveniently, reduces workman intensity of labour.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is an enlarged view of the annular groove i and an enlarged view of the annular groove ii.
Fig. 4 is an enlarged view of the annular groove iii.
The sequence numbers in the figures illustrate: 1-feeding pipeline, 2-annular water injection channel, 3-buffer water storage cavity, 4-discharging pipeline, 5-water injection pipe, 6-annular closed shell, 11-large diameter straight pipe section, 12-reducing conical pipe section, 13-small diameter straight pipe section, 14-annular groove I, 41-annular groove II, 51-annular groove III, 61-annular top plate, 62-shell pipe and 63-annular bottom plate.
Detailed Description
As shown in fig. 1 to 4, the damping device of the cemented filling slurry conveying pipeline of the invention is connected in series on the conveying pipeline, and comprises a feed pipeline 1, a discharge pipeline 4, an annular closed shell 6, a water injection pipe 5, a buffer water storage cavity 3 and an annular water injection channel 2, and is characterized in that: the feeding pipeline 1 is formed by sequentially concentrically matching and connecting a large-diameter straight pipe section 11, a reducing conical pipe section 12 and a small-diameter straight pipe section 13, the inner diameter of the large-diameter straight pipe section 11 is the same as the inner diameter of a conveying pipeline, an annular groove I14 for being connected with the conveying pipeline in a clamping manner is arranged on the outer wall close to the pipe orifice of the receiving end part of the large-diameter straight pipe section, the outer diameter of the small-diameter straight pipe section 13 is smaller than the inner diameter of the conveying pipeline, and the small-diameter straight; the discharge pipeline 4 is a straight pipeline with the same inner diameter as the inner diameter of the conveying pipeline, an annular groove II 41 used for being connected with the conveying pipeline in a clamping way is arranged on the outer wall close to the pipe orifice position of the discharge end part of the discharge pipeline, the annular closed shell 6 comprises an annular top plate 61, an annular bottom plate 63 and a shell pipe 62, the inner ring of the annular top plate 61 is concentrically sleeved and fixed on the joint part of the small-diameter straight pipe section 13 and the reducing conical pipe section 12 on the feeding pipeline 1, the inner ring of the annular bottom plate 63 is concentrically sleeved and fixed on the discharge pipeline 4, one end of the shell pipe 62 is concentrically fixed with the outer ring edge of the annular top plate 61, the other end of the shell pipe 62 is concentrically fixed with the outer ring edge of the annular bottom plate 63, a water filling port is arranged on the outer shell pipe 62 close to the annular bottom plate 63, one end of the water filling, the water injection pipe is connected with an external water supply system pipeline through an annular groove III 51 in a clamping manner, and a filter with the filtering precision of 100 meshes is arranged on the water injection pipe;
the buffer water storage cavity 3 is formed by a space between the inner wall of the shell pipe 62 and the outer wall of the discharge pipeline 4;
the annular water injection channel 2 is formed by a space between the outer wall of the small-diameter straight pipe section 13 and the inner wall of the discharge pipeline 4; a gap is reserved between the annular top plate 61 and the pipe orifice at the feeding end of the discharging pipeline 4, so that the buffering water storage cavity 3 is communicated with the annular water injection channel 2.
The invention is further described below with reference to specific examples.
Examples
The underground goaf is filled by adopting the gravity flow conveying of high-concentration tailing cemented filling slurry in a certain mine, the vertical filling pipeline is 340m high, and the specific gravity of the filling slurry is 1.835t/m3The filling pipeline has the specification of phi 219 multiplied by 18, the design pressure grade is PN63, and the inner diameter is 183mm, and the drag reduction device for the cemented filling slurry conveying pipeline adopts the drag reduction device for the cemented filling slurry conveying pipeline, wherein the inner diameter of a large-diameter straight pipe section 11 of a feeding pipeline 1 is 183mm, the groove width of an annular groove I14 is W1=11mm, the groove depth is H1=6.5mm, the distance from a groove edge to a pipe orifice end is L1=20.5mm, the outer diameter of a small-diameter straight pipe section 13 is 180mm, and the inner diameter is 152 mm; the inner diameter of the discharge pipeline 4 is 183mm, the outer diameter is 219mm, the groove width of the annular groove II is W1=11mm, the groove depth is H1=6.5mm, and the distance from the groove edge to the end of the pipe orifice is L1=20.5 mm; the length of the small-diameter straight pipe section 13 of the feeding pipeline 1 inserted into the discharging pipeline 4 is L =80mm, and the width of the annular water injection channel 2 is 1.5 mm; the inner diameter of the annular closed shell 6 is 225mm, and the width of the buffer water storage cavity 3 is 3 mm; the thicknesses of the annular top plate 61 and the annular bottom plate 63 of the annular closed shell 6 are both 8mm, and the gap between the annular top plate 61 and the pipe orifice at the upper end of the discharge pipeline 4 is 10 mm; the inner diameter of the water injection pipe 5 is 32mm, the design pressure grade is PN63, the groove width of the annular groove III 51 is W2=8mm, the groove depth is H2=3mm, the distance from the groove edge to the end of the pipe orifice is L2=16mm, and the distance from the annular bottom plate 63 of the central line of the water injection pipe 5 is 40 mm; the distance between the annular top plate 61 and the annular bottom plate 63 is 150 mm.
The drag reduction indices are shown in table 1.
Practice shows that after the damping device of the cemented filling slurry conveying pipeline is adopted, the stability of the filling slurry is ensured, the resistance of the filling slurry conveying pipeline is effectively reduced, the abrasion loss of the pipeline is reduced, the filling multiple line is improved, and the self-flow conveying distance is greatly prolonged.
Claims (8)
1. The utility model provides a cementing fills ground paste pipeline's fairing, fairing establish ties on pipeline, including charge-in pipeline, ejection of compact pipeline, annular closed shell, water injection pipe, buffering water storage chamber and annular water injection passageway, its characterized in that: the feeding pipeline is formed by sequentially concentrically matching and connecting a large-diameter straight pipe section, a reducing conical pipe section and a small-diameter straight pipe section, the inner diameter of the large-diameter straight pipe section is the same as that of the conveying pipeline, an annular groove I for being connected with the conveying pipeline in a clamping manner is arranged on the outer wall close to the pipe orifice of the receiving end part of the large-diameter straight pipe section, the outer diameter of the small-diameter straight pipe section is smaller than the inner diameter of the conveying pipeline, and the small-diameter straight pipe section; the discharge pipeline is a straight pipeline with the same inner diameter as the conveying pipeline, an annular groove II for being connected with the conveying pipeline in a clamping manner is arranged on the outer wall close to the pipe orifice of the discharge end part of the discharge pipeline, the annular closed shell comprises an annular top plate, an annular bottom plate and a shell pipe, wherein the inner ring of the annular top plate is concentrically sleeved and fixed at the joint part of the small-diameter straight pipe section and the reducing conical pipe section on the feeding pipeline, the inner ring of the annular bottom plate is concentrically sleeved and fixed on the discharging pipeline, one end of the outer shell pipe is concentrically and fixedly connected with the outer ring edge of the annular top plate, the other end of the outer shell pipe is concentrically and fixedly connected with the outer ring edge of the annular bottom plate, a water injection port is arranged on the outer shell pipe close to the annular bottom plate, one end of the water injection pipe is connected with the water injection port, an annular groove III is formed in the outer wall of the pipe orifice at the other end of the water injection pipe and connected with an external water supply system pipeline through the annular groove III in a clamping mode;
the buffer water storage cavity is formed by a space between the inner wall of the shell pipe and the outer wall of the discharge pipeline;
the annular water injection channel is formed by a space between the outer wall of the small-diameter straight pipe section and the inner wall of the discharge pipeline;
a gap is reserved between the annular top plate and the pipe orifice at the feeding end of the discharging pipeline, so that the buffering water storage cavity is communicated with the annular water injection channel.
2. The apparatus of claim 1 wherein the apparatus further comprises: the groove width W1, the groove depth H1 and the distance L1 between the groove edge and the end of the pipe orifice of the annular groove I and the annular groove II are respectively determined according to the pressure grade of the conveying pipeline in which the annular groove I and the annular groove II are positioned; the groove width W2, the groove depth H2 and the distance L2 between the groove edge and the end of the nozzle of the annular groove III are determined according to the pressure grade of the external water supply system pipeline.
3. The apparatus of claim 1 wherein the apparatus further comprises: the length L of the small-diameter straight pipe section inserted into the discharge pipeline is 50-100 mm.
4. The apparatus of claim 1 wherein the apparatus further comprises: the distance between the annular top plate and the annular bottom plate of the annular closed shell is not less than 4 times of the inner diameter of the water injection pipe, and the distance between the central line of the water injection pipe and the annular bottom plate is 0.5-1.5 times of the inner diameter of the water injection pipe.
5. The apparatus of claim 1 wherein the apparatus further comprises: the width of annular water injection passageway is 1mm ~2 mm.
6. The apparatus of claim 1 wherein the apparatus further comprises: the width of the buffer water storage cavity is 2 mm-4 mm.
7. The apparatus of claim 1 wherein the apparatus further comprises: the gap between the annular top plate and the upper end pipe orifice of the discharge pipeline is the thickness of the annular top plate plus 1 mm-2 mm.
8. The apparatus of claim 1 wherein the apparatus further comprises: the water injection pipe is also provided with a filter, and the filtering precision is 50-100 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010979293.8A CN111981235A (en) | 2020-09-17 | 2020-09-17 | Damping device of cemented filling slurry conveying pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010979293.8A CN111981235A (en) | 2020-09-17 | 2020-09-17 | Damping device of cemented filling slurry conveying pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076259A (en) * | 2021-11-19 | 2022-02-22 | 湘潭大学 | Material slurry conveying pipeline pressure regulating system |
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2020
- 2020-09-17 CN CN202010979293.8A patent/CN111981235A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114076259A (en) * | 2021-11-19 | 2022-02-22 | 湘潭大学 | Material slurry conveying pipeline pressure regulating system |
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