CN210289833U

CN210289833U - Autonomous depressurization device for deep well filling pipeline

Info

Publication number: CN210289833U
Application number: CN201921300834.9U
Authority: CN
Inventors: 熊有为; 刘福春; 刘恩彦; 刘冰
Original assignee: CINF Engineering Corp Ltd
Current assignee: CINF Engineering Corp Ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-04-10
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses an autonomous depressurization device for a deep well filling pipeline, which comprises a vertically arranged charging barrel and a rotating mechanism arranged inside the charging barrel, wherein the upper part of the charging barrel is communicated with a filling station above the depressurization device through a feeding pipe, and the bottom of the charging barrel is communicated with a downhole goaf through a discharging pipe; the feed pipe is used for conveying the slurry conveyed by the filling station into the charging barrel and pushing the rotating mechanism to rotate. When the deep well is filled, the filling slurry enters the charging barrel through the feeding pipe to push the rotating mechanism to rotate, and on one hand, the blades at the lower end of the rotating mechanism are driven to shear and stir the slurry, so that the slurry is prevented from being separated and precipitated to cause pipeline blockage; on the other hand, the high potential energy of the slurry is converted into kinetic energy, so that the potential energy is reduced, the pressure at the bottom of the pipeline is reduced, and the pipe explosion accident is prevented. The utility model discloses need not the drive of outside power, utilize the ground paste energy independently to step down, it is with low costs, supervisory control is simple.

Description

Autonomous depressurization device for deep well filling pipeline

Technical Field

The utility model belongs to deep well mine fills the equipment field, relates to a deep well fills pipeline and independently steps down device.

Background

Mineral resources are important material bases for survival and development of human society, and more than 95% of energy, more than 80% of industrial raw materials and more than 70% of agricultural production data used by human beings at present are all from the mineral resources. However, as shallow mineral resources are gradually depleted, deep mineral resource mining has become a norm. Because deep well mining faces complex environments such as high ground stress, strong disturbance and the like, and ground pressure disasters such as goaf collapse, roadway deformation damage, rock burst and the like occur frequently, the safe and efficient mining of deep mineral resources is greatly restricted. The filling method mining can effectively process the underground goaf in time to control the surrounding rock movement and deformation, ensure the safety of personnel and equipment in the deep well mining process, and simultaneously can consume the tailing solid waste to the maximum extent, thereby being an advanced technology for realizing green mine construction and circular economy development.

However, in deep well filling, the height difference between the ground surface and the underground working surface is large, the filling multiple line is small, the flow rate of slurry is high, the pipeline is easily abraded rapidly, and the material cost of the pipeline is increased; meanwhile, the high potential energy causes high pipeline pressure, and once the pipeline is blocked, the pipeline explosion accident is easily caused, the underground operation environment is polluted, and the safety of operators is damaged. Therefore, the most critical problem to be solved in deep well filling is how to realize effective and safe depressurization in the slurry pipeline transportation process, and the existing depressurization measures comprise arranging an open stirring station underground or adopting damping orifices, hole-shaped throttle pipes and the like, and although technically feasible, the field application is very few. The reason is that the currently used underground mixing plant needs to be attended by a fixed person, the operation equipment is started and stopped, the energy consumption is high, and the automation control degree is low. And the throttle hole and the throttle pipe are fast worn, the material consumption is large, the replacement and installation are complex, and the pressure reduction effect is limited.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide one kind and need not the independent pressure reduction means of deep well filling pipe that external power drive can realize the dissipation of ground paste energy.

In order to solve the technical problem, the utility model discloses a following technical scheme:

an autonomous depressurization device for a deep well filling pipeline comprises a vertically arranged charging barrel and a rotating mechanism arranged in the charging barrel, wherein the upper part of the charging barrel is communicated with a filling station above the depressurization device through a feeding pipe, and the bottom of the charging barrel is communicated with a goaf in a well through a discharging pipe; the feed pipe is used for conveying the slurry conveyed by the filling station into the charging barrel and pushing the rotating mechanism to rotate.

By means of the structure, when the deep well is filled, the filling slurry enters the charging barrel through the feeding pipe to push the rotating mechanism to rotate, the high potential energy of the slurry is converted into the kinetic energy, and the energy is reduced. On one hand, the blades at the lower end of the rotating mechanism are driven to shear and stir the slurry, so that the slurry is prevented from being isolated and precipitated to cause pipeline blockage; on the other hand, the high potential energy of the slurry is converted into kinetic energy, so that the potential energy is reduced, the pressure at the bottom of the pipeline is reduced, and the pipe explosion accident is prevented.

The utility model discloses need not the drive of outside power, utilize the ground paste energy independently to step down, it is with low costs, supervisory control is simple.

As a further improvement of the above technical solution:

the rotating mechanism comprises a rotating shaft and a plurality of first blades, the rotating shaft and the charging barrel are coaxial, the first blades are connected with the rotating shaft, and the first blades are radially distributed around the axial lead of the rotating shaft; the outlet end of the feed tube passes through the sidewall of the cartridge and is disposed toward the at least one first blade. The kinetic energy of the potential energy conversion of the slurry is blocked by the power blades to be further reduced.

The inlet pipe includes the pan feeding vertical section with filling the station intercommunication, with the pan feeding horizontal segment of feed cylinder intercommunication to and the pan feeding bend section of intercommunication pan feeding vertical section and pan feeding horizontal segment.

The impact surface of the first blade lies in a vertical plane. From this, ensure that the impact force is towards the impact surface, can ensure that ground paste accurately strikes the impact surface of first blade after getting into the feed cylinder on, the maximize dissipates thick liquids kinetic energy and ensures to drive rotary mechanism rotatory.

The first blade is an elliptical plate, the length of the first blade in the major axis direction is 300mm-500mm, and the length of the first blade in the minor axis direction is 100mm-200 mm. The blade quantity is 4, along the axial circumference equipartition.

The outlet end of the feeding horizontal section extends into the charging barrel, and the length of the feeding horizontal section extending into the charging barrel is 300-500 mm.

In the first blade with the outlet end of the feeding horizontal section facing, the outer edge of the first blade closest to the outlet end of the feeding horizontal section is 200-300 mm away from the outlet end of the feeding horizontal section. The jet flow slurry is guaranteed to effectively impact the blades, kinetic energy is converted into mechanical energy to the maximum extent, and the reverse impact of rebound on the outlet slurry after the slurry impacts the blades at a high speed can be avoided, so that the energy of the outlet slurry is consumed.

The rotating mechanism also comprises a plurality of second blades connected with the rotating shaft, and the second blades are radially distributed around the axial lead of the rotating shaft; the second blade is located below the first blade.

The included angle between the second blade and the horizontal plane is 15-45 degrees.

The feed cylinder is communicated with the discharge pipe through an overflow pipe, and the inlet end of the overflow pipe is located below the outlet end of the feed pipe.

The bottom of the charging barrel is connected with a discharge hopper, and the discharge pipe is communicated with the bottom of the discharge hopper.

The discharge pipe comprises an upper vertical section, a U-shaped pipe section and a discharge bent pipe section; the U-shaped pipe section comprises an upper horizontal section, a lower horizontal section and a lower vertical section which is communicated with the upper horizontal section and the lower horizontal section; the upper vertical section is communicated with the discharge hopper, the lower horizontal section is communicated with the underground goaf, and the discharge elbow section is communicated with the upper vertical section and the upper horizontal section.

The utility model discloses a theory of operation does:

when the deep well is filled, the filling slurry enters the charging barrel from the feeding horizontal section through the feeding vertical section and the feeding bent section, high potential energy formed by large height difference of the slurry is converted into kinetic energy to quickly impact the first blade on the upper part of the charging barrel, and the first blade drives the rotating shaft to rotate, so that the second blade fixed on the lower part of the rotating shaft rotates to independently shear the slurry. On one hand, after the slurry enters the open type cylinder space through the pipeline, the pressure is greatly released, on the other hand, the kinetic energy of the slurry is further reduced through the blocking of the upper blades and the shearing of the lower blades, and the slurry enters the lower conical hopper in a relatively moderate state to be collected. The sheared slurry can keep good workability, does not separate and precipitate, and can reduce the residual kinetic energy of the slurry through shearing. The slurry dissipates through energy, is collected into a lower hopper, is conveyed to the goaf through a discharge pipe at the bottom, and is prevented and reduced by the power blade due to the kinetic energy of the slurry, and is dissipated by shearing, so that the water hammer phenomenon cannot occur when the slurry enters the discharge pipe, air cannot be brought into a pipeline, and the full pipe flow is favorably formed. When the slurry liquid level in the upper circular cylinder is too high, which may cause the shearing blade to be pressed too much and rotate difficultly, the slurry flows into the upper horizontal section of the U-shaped pipe section through the overflow recovery pipeline on the cylinder wall and enters the goaf. The resistance of the blade is prevented from increasing due to the ultrahigh liquid level, the blade is difficult to shear, and the safe and reliable operation of the pressure reducing device is ensured.

Compared with the prior art, the utility model has the advantages of:

the utility model has the characteristics of open complete pressure release, need not outside power drive, the ground paste energy conversion independently stirs, prevents that liquid level superelevation independently adjusts etc, can effectively reduce the pressure that the deep well is filled the ground paste transportation process in the pipeline and receives, prevents the pipe explosion, guarantee production safety.

Drawings

Fig. 1 is a schematic view of the autonomous depressurization device for a deep well filling pipeline according to an embodiment of the present invention.

Fig. 2 is an application schematic diagram of the autonomous depressurization device for a deep well filling pipeline according to the embodiment of the present invention.

Fig. 3 is a schematic view of the sectional structure of the autonomous depressurization device for a deep well filling pipeline according to an embodiment of the present invention.

Fig. 4 is a schematic view of the overlooking structure of the autonomous depressurization device for a deep well filling pipeline of the embodiment of the present invention.

Illustration of the drawings: 1. a charging barrel; 11. sealing the material cover; 111. an exhaust hole; 2. a rotation mechanism; 21. a rotating shaft; 22. a first blade; 221. an impact surface; 23. a second blade; 3. a feed pipe; 31. feeding a vertical section; 32. feeding a horizontal section; 33. feeding a bent pipe section; 4. a filling station; 5. a discharge pipe; 51. an upper vertical section; 52. discharging the bent pipe section; 53. an upper horizontal section; 54. a lower horizontal section; 55. a lower vertical section; 6. a downhole goaf; 7. an overflow pipe; 8. a discharge hopper; 9. a support beam.

Detailed Description

The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.

Example 1:

as shown in fig. 1 and 2, the autonomous depressurization device for the deep well filling pipeline of the embodiment comprises a vertically arranged charging barrel 1 and a rotating mechanism 2 arranged inside the charging barrel 1, wherein the upper part of the charging barrel 1 is communicated with a filling station 4 above the depressurization device through a feeding pipe 3, and the bottom of the charging barrel 1 is communicated with a downhole goaf 6 through a discharging pipe 5; the feed pipe 3 is used for conveying the slurry conveyed by the filling station 4 into the barrel 1 and pushing the rotating mechanism 2 to rotate.

As shown in fig. 4, a sealing cover 11 is arranged at the top of the charging barrel 1, the sealing cover 11 is made of a steel plate with a thickness of 50mm, and a square exhaust hole 111 with a side length of 500mm is formed in the sealing cover 11. The vent 111 serves as both a sight glass and a service access. The diameter of the charging barrel 1 is 1000 mm-3000 mm, and the height is 1000 mm-3000 mm.

The bottom of the charging barrel 1 is provided with a conical hopper 8, and a supporting beam 9 is welded at the junction of the charging barrel 1 and the hopper 8 and used as a fixed beam of the rotating mechanism 2.

In the present embodiment, the rotation mechanism 2 includes a rotation shaft 21 coaxial with the barrel 1, and a plurality of first blades 22 connected to an upper portion of the rotation shaft 21 and a plurality of second blades 23 connected to a lower portion of the rotation shaft 21.

The upper end and the lower end of the rotating shaft 21 are respectively connected with the sealing cover 11 and the support beam 9 through bearings.

As shown in fig. 3, the plurality of first blades 22 are radially distributed about the axis of the rotary shaft 21; the first blade is an elliptical plate, the length of the first blade in the major axis direction is 300mm-500mm, and the length of the first blade in the minor axis direction is 100mm-200 mm. The blade quantity is 4, along the axial circumference equipartition. The impact surface 221 of the first blade 22 lies in a vertical plane. The feeding pipe 3 comprises a feeding vertical section 31 communicated with the filling station 4, a feeding horizontal section 32 communicated with the charging barrel 1, and a feeding bent pipe section 33 communicated with the feeding vertical section 31 and the feeding horizontal section 32. The outlet end of the feed horizontal section 32 penetrates the side wall of the barrel 1 and is arranged towards the at least one first blade 22. This directs the impact force to the impact surface, and ensures that the slurry enters the barrel 1 and then precisely impacts the impact surface 221 of the first blade 22.

The length of the feeding horizontal section 32 extending into the charging barrel 1 is 300mm-500 mm. In the first blade 22 facing the outlet end of the feeding horizontal section 32, the outer edge of the first blade 22 closest to the outlet end of the feeding horizontal section 32 is 200mm-300mm away from the outlet end of the feeding horizontal section 32. Therefore, the jet flow slurry is guaranteed to effectively impact the blades, kinetic energy is converted into mechanical energy to the maximum extent, and the reverse impact of rebound on the outlet slurry after the slurry impacts the blades at a high speed can be guaranteed, so that the energy of the outlet slurry is consumed.

The second blade 23 is located 100 mm-300mm above the support beam 9. The plurality of second blades 23 are radially and uniformly distributed around the axial lead of the rotating shaft 21, and the included angle between the second blades 23 and the horizontal plane is 15-45 degrees. The number of the second blades 23 is 3 or 4. The second blade 23 is a rectangular plate with a length of 300mm-500mm and a width of 100mm-200 mm. Can ensure that the slurry is fully sheared and stirred.

In this embodiment, the charging barrel 1 is communicated with the discharging pipe 5 through an overflow pipe 7, and the inlet end of the overflow pipe 7 is positioned below the outlet end of the feeding pipe 3.

The bottom of the charging barrel 1 is connected with a discharging hopper 8, and the discharging pipe 5 is communicated with the bottom of the discharging hopper 8.

Specifically, the discharging pipe 5 comprises an upper vertical section 51, a U-shaped pipe section and a discharging bent pipe section 52; the U-shaped pipe section comprises an upper horizontal section 53, a lower horizontal section 54 and a lower vertical section 55 communicating the upper horizontal section 53 and the lower horizontal section 54; the upper vertical section 51 is communicated with the discharge hopper 8, the lower horizontal section 54 is communicated with the underground goaf 6, and the discharge elbow section 52 is communicated with the upper vertical section 51 and the upper horizontal section 53.

The invention is further illustrated below by way of an example:

as shown in figure 2, the filling system is located at the surface elevation of +50m, the underground filling working surface is-650 m, the height difference reaches 700m, if continuous pipelines are adopted for conveying slurry, the maximum pipeline static pressure exceeds 12Mpa and far exceeds the pressure bearing range of the existing filling pipelines, great pipe explosion risks exist, and personnel safety is seriously threatened. Therefore, a pressure reduction chamber is arranged in the middle section of-300 m, and the pressure reduction device of the utility model is adopted in the chamber. The height difference of the slurry from the surface filling preparation station to the underground depressurization chamber is 350m, the concentration of the filling slurry is 72 percent, and the volume weight of the slurry is 1.6t/m³The diameter of the filling drilling pipeline is 200mm, the pipeline conveying resistance loss coefficient is 1.8kPa/m, and according to energy conservation, after the gravitational potential energy generated when the slurry reaches an outlet from a drilling inlet overcomes the energy loss of the pipeline friction resistance, about 1.5 multiplied by 10 still exists⁶The energy of the coke corresponds to a high head pressure of about 150 m.

The diameter of the charging barrel 1 at the upper part of the pressure reduction device is 2000mm, and the height is 2500 mm. The specification and the size of the sealing cover 11 are consistent with the section of the charging barrel 1, and the sealing cover is made of a steel plate with the thickness of 50 mm. A square vent hole 111 with the side length of 500mm is arranged on the sealing cover 11. The feeding horizontal section 32 is connected with the feeding vertical section 31 through a feeding elbow section 33. The first blade 22 serves as a power blade, and the second blade 23 serves as a shear blade. The outlet end of the feeding horizontal section 32 faces the impact surface 221 of a certain first blade 22 in the barrel 1, so that the slurry is ensured to accurately impact the surface of the first blade 22 after entering the barrel 1. The end part of the outlet of the feeding horizontal section 32 enters the interior of the circular cylinder 1 and exceeds the inner wall by 300 mm. The outlet end of the feeding horizontal section 32 is spaced 250mm from the outer edge of the rotating circumference of the upper first blade 22. The rotating shaft 21 is fixed between the sealing cover 11 and the support beam 9 through a bearing. The position of the upper first blade 22 on the rotating shaft 21 is the same as the height of the feeding horizontal section 32, 4 adjacent blades are respectively arranged at 90 degrees, the surfaces of the blades are not bent, and the normal direction of the blades is 90 degrees with the rotating shaft 21. The upper first vane 22 is elliptical, and has a major axis direction length of 300mm and a minor axis direction length of 150 mm. The lower second vane 23 is positioned 200mm above the abutment beam 9. The angles between every two adjacent 4 vanes are respectively 90 degrees. The lower second vane 23 has a length of 300mm and a width of 150 mm. The lower second vane 23 surface makes an angle of 30 ° with the horizontal. The feeding end of the overflow pipe 7 is connected with the outer wall of the charging barrel 1, and the opening position is 1000mm above the second blade 23 at the lower part. The conical surface angle of the lower cone discharge hopper 8 is 45 degrees, the bottom of the lower cone discharge hopper 8 is connected with the discharge pipe 5, and the upper vertical section 51 is connected with the U-shaped pipe section through a discharge elbow section 52.

The slurry comes out from the feeding horizontal section 32 and quickly impacts the surface of the upper first blade 22, so that the upper power blade can rotate quickly, and the rotating shaft 21 and the lower second blade 23 are driven to rotate quickly to shear and stir the slurry. The ground paste after the stirring can effectively avoid the segregation to deposit, stir the energy that makes the ground paste get into behind the bucket simultaneously and can subdue, is favorable to avoiding the ground paste because get into discharging pipe 5 fast and arouse the water hammer phenomenon, causes the air admission pipeline, forms non-full pipe flow, the wearing and tearing of pipeline with higher speed. When the slurry level in the charging barrel 1 is too high, which may cause the second blade 23 to be pressed too much and rotate difficultly, the slurry is converged into the discharge pipe 5 through the overflow pipe 7 on the barrel wall and enters the goaf. And after filling is finished, supplying water to the ground surface high-level water tank for flushing a filling pipeline, and cleaning the pressure reduction device after the washing water enters the pressure reduction device through a drilling pipeline.

The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.

Claims

1. The automatic depressurization device for the deep well filling pipeline is characterized by comprising a vertically arranged charging barrel (1) and a rotating mechanism (2) arranged in the charging barrel (1), wherein the upper part of the charging barrel (1) is communicated with a filling station (4) above the depressurization device through a feeding pipe (3), and the bottom of the charging barrel (1) is communicated with a downhole goaf (6) through a discharging pipe (5); the feeding pipe (3) is used for conveying the slurry conveyed by the filling station (4) into the charging barrel (1) and pushing the rotating mechanism (2) to rotate.

2. The autonomous depressurization device for a deep well filling pipe according to claim 1, wherein the rotating mechanism (2) comprises a rotating shaft (21) coaxial with the barrel (1), and a plurality of first blades (22) connected to the rotating shaft (21), the plurality of first blades (22) being radially distributed around the axial center of the rotating shaft (21); the outlet end of the feed tube (3) passes through the side wall of the cartridge (1) and is arranged towards the at least one first blade (22).

3. The autonomous depressurization device for deep well filling pipelines according to claim 2 wherein the feed pipe (3) comprises a feed vertical section (31) communicating with the filling station (4), a feed horizontal section (32) communicating with the barrel (1), and a feed elbow section (33) communicating the feed vertical section (31) and the feed horizontal section (32).

4. The autonomous depressurization device of deep well filling pipe according to claim 3 wherein the impact surface (221) of the first blade (22) is in a vertical plane.

5. The autonomous depressurization device for a deep well filling pipe according to claim 4, wherein the outlet end of the feeding horizontal section (32) extends into the barrel (1), and the length of the feeding horizontal section (32) extending into the barrel (1) is 300mm to 500 mm.

6. The autonomous depressurization device for a deep well filling pipe according to claim 5, wherein, in the first blade (22) facing the outlet end of the feeding horizontal section (32), the outer edge of the first blade (22) closest to the outlet end of the feeding horizontal section (32) is 200mm to 300mm from the outlet end of the feeding horizontal section (32).

7. The autonomous depressurization device for a deep well filling pipe according to any one of claims 2 to 6, wherein the rotation mechanism (2) further comprises a plurality of second blades (23) connected to the shaft (21), the plurality of second blades (23) being radially distributed around the axis of the shaft (21); the second blade (23) is located below the first blade (22).

8. The autonomous depressurization device for a deep well filling pipe according to claim 7 wherein the angle between the second blade (23) and the horizontal plane is 15 ° to 45 °.

9. The autonomous depressurization device for a deep well filling pipe according to any one of claims 2 to 6, wherein the charging barrel (1) and the discharging pipe (5) are communicated through an overflow pipe (7), and the inlet end of the overflow pipe (7) is located below the outlet end of the feeding pipe (3).

10. The autonomous depressurization device for a deep well filling pipeline according to any one of claims 2 to 6, wherein a discharge hopper (8) is connected to the bottom of the charging barrel (1), and the discharge pipe (5) is communicated with the bottom of the discharge hopper (8).