CN220302175U - Grouting nozzle for preventing thickened slurry from layering after long-distance conveying - Google Patents
Grouting nozzle for preventing thickened slurry from layering after long-distance conveying Download PDFInfo
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- CN220302175U CN220302175U CN202321923809.2U CN202321923809U CN220302175U CN 220302175 U CN220302175 U CN 220302175U CN 202321923809 U CN202321923809 U CN 202321923809U CN 220302175 U CN220302175 U CN 220302175U
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- 239000002002 slurry Substances 0.000 title claims abstract description 129
- 239000002245 particle Substances 0.000 claims abstract description 74
- 239000007787 solid Substances 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 19
- 230000008719 thickening Effects 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000013517 stratification Methods 0.000 claims 3
- 230000032798 delamination Effects 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 11
- 239000003245 coal Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a grouting nozzle for preventing thickened slurry from layering after long-distance conveying, which comprises a premixing device, a turbulent flow impact device and a nozzle main body, wherein the premixing device is arranged on the nozzle main body; when the thickening slurry flows through the premixing device, the spiral guide vane in the premixing device can change the flow direction of the thickening slurry, so that the thickening slurry generates turbulence in the shell, and each solid particle and particle group are uniformly distributed in the slurry; when the thickening slurry reaches the turbulent flow impact device, larger particle clusters enter the diverter main body through larger through holes, partial smaller particle clusters enter the diverter main body through smaller through holes to be diverted, turbulence is generated in the diverter main body at the moment, the smaller particle clusters and the larger particle clusters collide and impact in the diverter main body, and then are dispersed into solid particles, finally, along with the slurry sprayed out from a slurry outlet of the nozzle main body, the problem of sedimentation and layering is effectively solved, and the grouting effect of the thickening slurry after grouting is finally ensured.
Description
Technical Field
The utility model relates to a grouting nozzle, in particular to a grouting nozzle for preventing thickened slurry from layering after long-distance conveying, and belongs to the technical field of slurry mixing and injection.
Background
As the demand for energy increases, which results in the coal mine being exploited in large quantities, the problem of spontaneous combustion of coal is also gaining attention. The spontaneous combustion of coal has the problems of hidden fire sources, spatial three-dimensional distribution of fire areas and large fire passing area, so that stopping agents, thickening slurry and the like are injected into the coal mine fire prevention and extinguishing areas, and the safety of the coal mine is ensured by grouting.
The current grouting method commonly used in China is to uniformly mix solid particles and slurry on the ground to form thickened slurry, and spray the thickened slurry into a goaf through a grouting pipe. For example, the utility model patent with the patent number of CN202021683677.7 adopts a high-pressure grouting machine to drive the slurry into a grouting pipe, so that the slurry is sprayed out from a grouting nozzle; however, as the mining depth of the coal seam increases, the position where the thickened slurry is formed by mixing is far away from the position of the coal seam where grouting is needed, so that in the grouting process of the coal mine, the thickened slurry which is formed by preparation needs to be conveyed for a long distance through a pipeline, the thickened slurry is formed by mixing solid particles with slurry, the phenomenon of sedimentation and layering of the solid particles can occur after long-time transportation (namely, most of the solid particles are settled to the lower part of a conveying pipe, the slurry is positioned at the upper part of the conveying pipe, and layering is formed by relatively separating the solid particles from the slurry, and the settled solid particles can be bonded to form particle clusters with different sizes), so that when the thickened slurry is finally grouted to the needed position, the effect of most of the thickened slurry is reduced (the effect of the thickened slurry is mainly to be evenly injected through the mixing of the slurry and the solid particles, once layering occurs, the effect of the thickened slurry is still in a relatively separated state after grouting, and more thickened slurry needs to be injected, and the grouting efficiency is reduced; in order to solve the problem, some mines need to be provided with a stirrer at the grouting position to mix and stir the conveyed thickened slurry, so that extra stirring equipment is needed, and the whole grouting efficiency is reduced.
Therefore, how to provide a new grouting nozzle, after the thickening slurry is conveyed for a long distance to generate sedimentation and layering, the thickening slurry is mixed again, so that solid particles are dispersed in the slurry as uniformly as possible, the sedimentation and layering problem is effectively solved, the grouting effect of the thickening slurry after grouting is finally ensured, the grouting efficiency is improved, and the grouting nozzle is one of the technical problems to be solved in the industry.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides the grouting nozzle for preventing the thickened slurry from layering after long-distance conveying, which can avoid the problem of sedimentation layering after the thickened slurry is conveyed for a long distance, and can ensure the grouting effect after grouting the thickened slurry and improve the grouting efficiency by mixing the thickened slurry again without additional stirring equipment so that solid particles are uniformly dispersed in the slurry as much as possible.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a grouting spray head for preventing thickened slurry from layering after long-distance conveying comprises a premixing device, a turbulent flow impact device and a spray head main body;
the spray head main body is conical, two ends of the spray head main body are respectively provided with a slurry inlet and a slurry outlet, and the caliber of the slurry outlet is smaller than that of the slurry inlet;
the premixing device comprises a shell and a plurality of spiral guide vanes, wherein the shell is cylindrical, one end of the shell is coaxially and fixedly connected with a slurry inlet of the nozzle main body, and the caliber of a port of the shell is the same as that of the slurry inlet; the spiral guide plates are uniformly distributed in the shell, and when the thickened slurry passes through the shell, the flow direction of the thickened slurry is changed by each spiral guide plate, so that the thickened slurry generates turbulence in the shell, and solid particles and the thickened slurry are mixed through the turbulence effect;
the turbulence impact device comprises a diverter main body and a fixed bracket, wherein the diverter main body is bullet-shaped with one end open, the diverter main body is arranged in the nozzle main body through the fixed bracket, and the axis of the diverter main body is coaxial with the axis of the nozzle main body; the open end of the diverter main body extends into the premixing device towards the slurry outlet and the other end of the diverter main body, a plurality of through holes are distributed on the diverter main body, and the pore sizes of the through holes are gradually decreased from the other end of the diverter main body to the open end of the diverter main body; when the thickening slurry reaches the diverter main body, the larger particle groups move along with the slurry and enter the diverter main body through the through holes close to the other end of the diverter main body, the smaller particle groups enter the diverter main body through the through holes far away from the other end of the diverter main body to be diverted, turbulence is generated in the diverter main body at the moment, the smaller particle groups and the larger particle groups collide and impact in the diverter main body, the smaller particle groups and the larger particle groups are dispersed into solid particles, and finally the solid particles are sprayed out along with the slurry from a slurry outlet of the spray head main body.
Further, the number of the spiral guide vanes is four, and the four spiral guide vanes are all fixed in the shell and are uniformly distributed. By adopting the arrangement mode, the thickened slurry can be further ensured to have better mixing effect on the thickened slurry when flowing through the premixing device, so that each solid particle and each particle group are uniformly distributed in the slurry, and the subsequent turbulent impact effect is improved.
Further, the through holes are at least divided into three types of pore diameters, namely a through hole A, a through hole B and a through hole C, wherein the pore diameter of the through hole A is larger than that of the through hole B, and the pore diameter of the through hole B is larger than that of the through hole C. The three apertures can meet the required requirements, and the turbulent impact device is more convenient to prepare.
Further, the caliber of the slurry inlet is 2 times of that of the slurry outlet. By adopting the aperture ratio, the speed of the slurry sprayed from the slurry outlet can be ensured, so that the grouting effect can reach the required requirement.
Further, the plurality of through holes are distributed in a plurality of circles on the diverter main body, the distances between the through holes on each circle and the other end of the diverter main body are the same, the pore diameters of the through holes on each circle are the same, and the pore diameters of the through holes on different circles are different. By the arrangement of the structure, the particle groups passing through the through holes on each circle are similar in size, and the particle groups passing through the circles are large in size difference, so that the particle groups entering from the circles are impacted in the diverter main body by the diversion and thickening of the slurry through the circles, and are dispersed into solid particles, and the quality of the thickening slurry during grouting is effectively ensured.
Compared with the prior art, the utility model adopts a mode of combining the premixing device, the turbulent flow impact device and the nozzle body, and has the following advantages:
1. according to the pre-mixing device, when thickened slurry flows through the pre-mixing device, the spiral guide vanes in the pre-mixing device can change the flow direction of the thickened slurry, so that the thickened slurry generates turbulence in the shell, solid particles and the thickened slurry are primarily mixed under the action of the turbulence, so that the solid particles and particle clusters are uniformly distributed in the slurry, and the subsequent turbulence impact effect is improved;
2. according to the turbulent flow impact device adopted by the utility model, when the thickened slurry reaches the diverter main body, larger particle clusters enter the diverter main body through the larger through holes, and part of smaller particle clusters enter the diverter main body through the smaller through holes to be diverted, so that turbulence is generated in the diverter main body, the smaller particle clusters and the larger particle clusters collide and impact in the diverter main body, and are further dispersed into solid particles, and finally, along with the slurry sprayed out from a slurry outlet of the nozzle main body, the problems of sedimentation and layering are effectively solved, the grouting effect of the thickened slurry after grouting is finally ensured, and in addition, stirring equipment is not required to be additionally arranged, so that the grouting efficiency is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
FIG. 2 is a schematic view of a portion of the turbulence impact device and the nozzle body of FIG. 1;
FIG. 3 is a schematic partial structural view of the premixing device of FIG. 1.
In the figure: 1-premixing device, 2-turbulent impact device, 3-shell, 4-spiral deflector, 5-diverter main body, 6-shower nozzle main body, 7-through hole, 8-fixed bolster, 9-grout outlet.
Detailed Description
The present utility model will be further described below.
As shown in FIG. 1, the present utility model comprises a premixing device 1, a turbulent impingement device 2 and a nozzle body 6;
the spray head main body 6 is conical, two ends of the spray head main body 6 are respectively provided with a pulp inlet and a pulp outlet 9, and the caliber of the pulp inlet is 2 times of that of the pulp outlet. By adopting the aperture ratio, the speed of the slurry sprayed from the slurry outlet 9 can be ensured, so that the grouting effect can reach the required requirement.
As shown in fig. 3, the premixing device 1 includes a casing 3 and four spiral guide vanes 4, the casing 3 is cylindrical, one end of the casing 3 is fixedly connected with a slurry inlet of the nozzle main body 6 coaxially, and the caliber of a port of the casing 3 is the same as that of the slurry inlet; the four spiral guide vanes 4 are all fixed in the shell 3 and are uniformly distributed. By adopting the arrangement mode, the thickened slurry can be further ensured to have better mixing effect on the thickened slurry when flowing through the premixing device 1 by the spiral guide vane 4, so that each solid particle and each particle group are uniformly distributed in the slurry, and the subsequent turbulent impact effect is improved. When the thickened slurry passes through the shell 3, each spiral guide vane 4 changes the flow direction of the thickened slurry, so that the thickened slurry generates turbulence in the shell 3, and solid particles and the thickened slurry are mixed through the turbulence effect;
the turbulent flow impact device 2 comprises a diverter body 5 and a fixed bracket, wherein the diverter body 5 is bullet-shaped with one end open, the diverter body 5 is arranged in the nozzle body 6 through the fixed bracket 8, and the axis of the diverter body 5 is coaxial with the axis of the nozzle body 6; a gap is reserved between the diverter main body 5 and the inner wall of the nozzle main body 6, so that part of slurry can be conveyed to the slurry outlet 9 through the gap, and the phenomenon that slurry cannot be smoothly injected due to the fact that thickened slurry is accumulated at the diverter main body 5 due to overlarge grouting pressure is prevented. The open end of the diverter main body 5 extends into the premixing device 1 towards the slurry outlet 9, the other end of the diverter main body 5 is provided with a plurality of through holes 7 in a distributed manner, and the pore sizes of the through holes 7 are gradually decreased from the other end of the diverter main body 5 to the open end of the diverter main body 5; as shown in fig. 2, the through holes 7 are at least divided into three types of apertures, namely, a through hole a, a through hole B and a through hole C, wherein the aperture of the through hole a is larger than that of the through hole B, and the aperture of the through hole B is larger than that of the through hole C. The three apertures can meet the required requirements, and the turbulent impact device 2 is more convenient to prepare. When the thickened slurry reaches the diverter main body 5, as the slurry moves, larger particle clusters enter the diverter main body 5 through the through holes near the other end of the diverter main body 5, smaller particle clusters enter the diverter main body 5 through the through holes 7 far away from the other end of the diverter main body 5 to be diverted, turbulence is generated in the diverter main body 5 at the moment, the smaller particle clusters and the larger particle clusters collide in the diverter main body 5 and are dispersed into solid particles, and finally, the solid particles are sprayed out from the slurry outlet 9 of the spray head main body 6 along with the slurry.
As an improvement of the present utility model, the plurality of through holes 7 are distributed on the shunt body 5 in a plurality of circles, the distance between each through hole 7 on each circle and the other end of the shunt body 5 is the same, the pore diameters of each through hole on each circle are the same, and the pore diameters of the through holes on different circles are different. By arranging the structure, the particle groups passing through the through holes 7 on each circle are similar in size, and the particle groups passing through the different circles are large in size difference, so that the particle groups entering from different circles collide and impact each other in the diverter main body 5 through the diversion thickening slurry of different circles, and are dispersed into solid particles, and the quality of the thickening slurry during grouting is effectively ensured.
The spiral guide vane 4, the nozzle body 6, the fixing bracket 8 and the diverter body 5 can be prepared by the existing method or purchased by the market.
When the device is in operation, one end of the premixing device 1 is connected with a grouting pipeline, the grouting pipeline inputs thickened slurry conveyed by a long distance into the premixing device 1, when the thickened slurry passes through the shell 3 of the premixing device 1, each spiral guide vane 4 changes the flow direction of the thickened slurry, so that the thickened slurry generates turbulence in the shell 3, solid particles and the thickened slurry are primarily mixed under the action of the turbulence, so that each solid particle and each particle group are uniformly distributed in the slurry, and the subsequent turbulence impact effect is improved; then, the thickening slurry after preliminary mixing reaches the diverter main body 5, as the pore diameters of the through holes on the diverter main body 5 are different, larger particle groups can only act with slurry pressure through the larger through holes with larger pore diameters, the larger particle groups enter the diverter main body 5 through the larger through holes close to the other end of the diverter main body 5, part of smaller particle groups can also enter the diverter main body 5 through the larger through holes, the other part of smaller particle groups enter the diverter main body 5 through the smaller through holes 7 far away from the other end of the diverter main body 5, and the particle groups with different particle diameters are diverted through a plurality of different pore diameters, turbulence is generated in the diverter main body 5 at the moment, so that the smaller particle groups and the larger particle groups collide and impact in the diverter main body 5, and then, all solid particles adhered are dispersed in slurry, finally, are sprayed out from the slurry outlet 9 of the nozzle main body 6 along with the slurry, the problem of sedimentation and layering is effectively solved, and the grouting effect of the thickening slurry is finally ensured.
The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.
Claims (5)
1. A grouting nozzle for preventing thickened slurry from layering after long-distance conveying, which is characterized by comprising a premixing device, a turbulent flow impact device and a nozzle main body;
the spray head main body is conical, two ends of the spray head main body are respectively provided with a slurry inlet and a slurry outlet, and the caliber of the slurry outlet is smaller than that of the slurry inlet;
the premixing device comprises a cylindrical shell and a plurality of spiral guide vanes, one end of the shell is coaxially and fixedly connected with a slurry inlet of the nozzle body, and the caliber of a port of the shell is the same as that of the slurry inlet; the spiral guide plates are uniformly distributed in the shell, and when the thickened slurry passes through the shell, the flow direction of the thickened slurry is changed by each spiral guide plate, so that the thickened slurry generates turbulence in the shell, and solid particles and the thickened slurry are mixed through the turbulence effect;
the turbulence impact device comprises a diverter main body and a fixed bracket, wherein the diverter main body is bullet-shaped with one end open, the diverter main body is arranged in the nozzle main body through the fixed bracket, and the axis of the diverter main body is coaxial with the axis of the nozzle main body; the open end of the diverter main body extends into the premixing device towards the slurry outlet and the other end of the diverter main body, a plurality of through holes are distributed on the diverter main body, and the pore sizes of the through holes are gradually decreased from the other end of the diverter main body to the open end of the diverter main body; when the thickening slurry reaches the diverter main body, the larger particle groups move along with the slurry and enter the diverter main body through the through holes close to the other end of the diverter main body, the smaller particle groups enter the diverter main body through the through holes far away from the other end of the diverter main body to be diverted, turbulence is generated in the diverter main body at the moment, the smaller particle groups and the larger particle groups collide and impact in the diverter main body, the smaller particle groups and the larger particle groups are dispersed into solid particles, and finally the solid particles are sprayed out along with the slurry from a slurry outlet of the spray head main body.
2. The grouting nozzle for preventing the stratification of thickened slurry after long-distance transportation according to claim 1, wherein the number of the spiral guide vanes is four, and the four spiral guide vanes are all fixed in the shell and uniformly distributed.
3. The grouting nozzle for preventing the stratification of the thickened slurry after long-distance transportation according to claim 1, wherein the through holes are divided into at least three kinds of pore diameters, namely a through hole A, a through hole B and a through hole C, the pore diameter of the through hole A is larger than the pore diameter of the through hole B, and the pore diameter of the through hole B is larger than the pore diameter of the through hole C.
4. The grouting nozzle for preventing delamination of thickened slurry after long distance transportation according to claim 1, wherein the inlet aperture is 2 times the outlet aperture.
5. The grouting nozzle for preventing the stratification of the thickened slurry after long-distance transportation according to claim 1, wherein the plurality of through holes are distributed in a plurality of circles on the diverter body, the distances between the through holes on each circle and the other end of the diverter body are the same, the pore diameters of the through holes on each circle are the same, and the pore diameters of the through holes on different circles are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321923809.2U CN220302175U (en) | 2023-07-21 | 2023-07-21 | Grouting nozzle for preventing thickened slurry from layering after long-distance conveying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321923809.2U CN220302175U (en) | 2023-07-21 | 2023-07-21 | Grouting nozzle for preventing thickened slurry from layering after long-distance conveying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220302175U true CN220302175U (en) | 2024-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321923809.2U Active CN220302175U (en) | 2023-07-21 | 2023-07-21 | Grouting nozzle for preventing thickened slurry from layering after long-distance conveying |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220302175U (en) |
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2023
- 2023-07-21 CN CN202321923809.2U patent/CN220302175U/en active Active
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