CN213331190U - Underground reservoir air column eliminating device for abandoned mine - Google Patents
Underground reservoir air column eliminating device for abandoned mine Download PDFInfo
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- CN213331190U CN213331190U CN202022428195.3U CN202022428195U CN213331190U CN 213331190 U CN213331190 U CN 213331190U CN 202022428195 U CN202022428195 U CN 202022428195U CN 213331190 U CN213331190 U CN 213331190U
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- shell
- port
- air column
- floating ball
- underground reservoir
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- 238000007667 floating Methods 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 45
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to an abandonment mine reforms transform technical field, provides an underground reservoir air column remove device for abandonment mine, including tee bend pipe fitting, be equipped with the floater device under the port of tee bend pipe fitting lower part, the floater can block this port when receiving buoyancy, and this port drops after buoyancy is eliminated, the other both ends mouth of tee bend pipe fitting is connected with the breather pipe respectively. The beneficial effects are that: the cost is low, the problem of counteracting the reservoir air column can be effectively solved, and the storage capacity of the underground reservoir of the abandoned mine is ensured.
Description
Technical Field
The utility model relates to a technical field is reformed transform to the abandonment mine, in particular to abandonment mine is with underground reservoir air column remove device.
Background
Coal is a non-renewable resource that is primarily stored underground. Coal is mainly excavated through mines. Coal in the mine can be abandoned to form a waste mine after being emptied, the waste mine causes a large number of underground goafs, and the underground space of only the Chinese goafs reaches 234 billions and cubic meters by 2030, so how to utilize the underground space of the waste mine is a problem to be solved urgently.
At present, a mature scheme for utilizing underground space of abandoned mines is to use the underground space as physical energy storage, and the main approach is to transform the abandoned mines into underground reservoirs of dam-free pumped storage power stations. Because the abandoned mine roadways have complex structures and altitude difference, the internal horizontal height of some roadways is greater than the horizontal height of an inlet, and in the water filling process, along with the rising of the water level, the air in the area with higher internal horizontal height is sealed by water and can not escape, and finally a compressed air column is formed in the area, so that the water storage volume of the underground reservoir is greatly reduced, and the water pumping energy storage power generation efficiency is reduced.
Aiming at the problem of the air column of the underground mine, the problem is mainly solved by two technical means shown in figure 1, the first method is to guide out air from the compressed air column of the roadway 100 by drilling the air through hole 200 on the ground, and the scheme has the problems of long construction period, high budget, house removal, noise disturbance and the like although the scheme has good effect; the second is that the air pipe 300 is laid to the roadway 100 through the mine district return air connecting roadway 400 to lead out air, the scheme does not have a compressed air column when the water is filled for the first time, but the air pipe 300 can be filled with water when the water is filled, and then the water in the mine is pumped out to an above-ground reservoir, accumulated water can be retained in the air pipe, and when the water is filled for the second time, the accumulated water retained in the air pipe can form a water seal and can form the compressed air column again.
Therefore, the two existing technical means can not solve the problem of air columns of the underground reservoirs of the abandoned mines stably for a long time at low cost, and the storage capacity of the underground reservoirs can not be utilized to the maximum extent, so that the utilization efficiency of the abandoned mine resources is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a abandonment underground reservoir air column remove device for mine to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an underground reservoir air column eliminating device for a waste mine comprises a three-way pipe fitting with three ports a, b and c, wherein the port a is a vertically downward port of the three-way pipe fitting, a hollow annular truncated cone-shaped shell is arranged right below the port a, the small end of the shell is hermetically connected with the port a, the large end of the shell is sealed by a netted tray, a floating ball is arranged in the shell, the outer diameter of the floating ball is larger than the inner diameter of the port a, and the floating ball can form a linear sealing structure with the inner wall of the shell or the port a under the action of buoyancy; and two ports b and c of the three-way pipe fitting are respectively connected with a vent pipe.
Preferably, the small end of the shell is connected with the port a in a sealing mode through thread fit.
Preferably, the floating ball is a hollow floating ball, and the inner surface of the shell is provided with a silica gel coating.
Preferably, a silica gel sealing ring is arranged on the inner surface of the shell or the sealing matching position of the port a and the floating ball.
Preferably, the floating ball, the three-way pipe fitting, the shell, the net-shaped tray and the vent pipe are all made of stainless steel, and the surface of the floating ball is a chromium-plated layer.
The working principle is as follows: the underground reservoir air column eliminating method for the abandoned mine comprises the underground reservoir air column eliminating device for the abandoned mine, and comprises the following specific steps: a vent pipe connected with one end of the tee pipe fitting is communicated with a top plate at the highest position of a roadway which can form an air column, a vent pipe connected with the other end of the tee pipe fitting is communicated with a return air connection roadway of a mining area of a waste mine, and the vent pipe has no return bend; the three-way pipe is positioned at the lowest part of the vent pipe, the port of the three-way pipe, which is connected with the shell, is the port at the lowest part and is positioned in the vertical direction, and the shell, the floating ball and the reticular tray are positioned under the port.
Has the advantages that: 1. by combining the process of charging and discharging water of the underground reservoir of the abandoned mine, the underground reservoir is blocked in a water path during water charging by virtue of the buoyancy effect of the hollow floating ball, and the air outlet in the air vent pipe is ensured, so that the air column of the underground reservoir is effectively eliminated, and the problem of reduction of the water storage volume caused by the air column of the underground reservoir is solved.
2. The floating ball falls into the tray under the action of gravity of water in the pipe, the water in the pipe is automatically emptied, the problem that accumulated water in a part of vent pipes laid at a low position cannot be drained is solved, and the smooth elimination of the air column during water refilling is ensured.
3. The construction of the vent hole can be greatly reduced, and the engineering expenditure is saved; the device has the advantages of simple design, convenient manufacture, quick installation and the like; meanwhile, the ventilation condition of the underground reservoir of the abandoned mine is greatly improved, and the controllability of the underground reservoir in the water charging and discharging process and the utilization efficiency of the abandoned mine resources are improved.
Drawings
Fig. 1 is a schematic structural diagram of the prior art.
Fig. 2 is a schematic structural view of the underground reservoir air column eliminating device for the abandoned mine according to the present invention.
Fig. 3 is a schematic view of the floating ball structure.
Fig. 4 is a schematic structural view of a use state of the underground reservoir air column eliminating device for the abandoned mine according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following description of embodiments thereof, which is made for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.
Example 1
Referring to fig. 2 and 3, the underground reservoir air column eliminating device for the abandoned mine comprises a three-way pipe fitting with three ports a, b and c, wherein the port a 1 is a vertically downward port of the three-way pipe fitting, a hollow annular truncated cone-shaped shell 2 is arranged right below the port a, the small end of the shell is hermetically connected with the port a, the large end of the shell is sealed by a mesh tray 3, a floating ball 4 is arranged in the shell, the outer diameter of the floating ball is larger than the inner diameter of the port a, and the floating ball can form a linear sealing structure with the inner wall of the shell or the port a under the action of buoyancy; two ports b and c (5 and 6) of the three-way pipe fitting are respectively connected with a vent pipe 7. In practical application, the bent part can also use a bent pipe structure connecting piece 8.
Preferably, the small end of the shell is connected with the port a in a sealing mode through threaded fit for facilitating disassembly and assembly.
As a preferred scheme, in order to improve the sealing effect and meet the buoyancy requirement, the floating ball is a hollow floating ball, and the inner surface of the shell is provided with a silica gel coating.
Preferably, in order to improve the sealing effect, as shown in fig. 3, a silicone sealing ring 9 is disposed on the inner surface of the housing or a sealing fit position of the port a and the floating ball.
As a preferred scheme, in order to improve the corrosion resistant effect of the parts, the floating ball, the three-way pipe fitting, the shell, the reticular tray and the vent pipe are all made of stainless steel materials, and the surface of the floating ball is a chromium-plated layer.
The principle is as follows: a method for eliminating an air column of an underground reservoir for a abandoned mine, as shown in fig. 4, comprising the underground reservoir air column eliminating apparatus 10 for a abandoned mine disclosed in embodiment 1, the method comprising: a vent pipe 7 connected with one end of the tee pipe fitting is communicated with the highest top plate position of the roadway 100 which can form the air column, a vent pipe connected with the other end of the tee pipe fitting is communicated with a return air connecting roadway 400 of the mining area of the abandoned mine, and the vent pipe 7 has no return bend; the three-way pipe is positioned at the lowest part of the vent pipe, the port of the three-way pipe, which is connected with the shell, is the port at the lowest part and is positioned in the vertical direction, and the shell, the floating ball and the reticular tray are positioned under the port.
The method comprises the following specific steps:
(1) firstly, related physical parameters such as the pipe diameter of the vent pipe and the flow rate of fluid in the vent pipe are determined. According to a head loss formula of fluid flowing in the circular pipeline, corresponding on-way loss and local loss can be calculated, and the total head loss is not more than a critical value A by combining with the highest energy consumption requirement in the pumped storage power generation process. The specific calculation formula is as follows:
in the formula (1), hf-loss of head along the way, m;
hj-local head loss, m;
h-total head loss, m;
l-segment length, m;
d-diameter of the vent pipe, m;
v-average flow velocity of section, m/s;
λ -coefficient of on-way drag;
ζ -local drag coefficient;
a-maximum total head loss, m. Determined according to specific engineering requirements.
Another set of relationships can be determined according to the relationship between the flow rate, the flow velocity and the cross-sectional area:
in formula (2), Q-flow rate of fluid in the vent pipe, m3/h。
The flow rate of the fluid in the vent pipe can be determined according to engineering design, and the diameter and the section average flow rate of the corresponding vent pipe can be obtained by combining two sets of equations. The breather pipe should combine tunnel section size, increases the pipe diameter as far as possible, reduces the windage, reduces energy loss.
(2) Secondly, selecting a proper tee pipe fitting according to the determined pipe diameter of the preset vent pipe, wherein the pipe diameter of the tee pipe fitting is matched with that of the vent pipe; the pipe diameter of the three-way branch pipe is reasonably selected according to engineering requirements on the premise of considering factors such as the size of the section of the roadway, the installation difficulty and the like.
(3) Then, the size of the inner diameter and the outer diameter of the hollow floating ball and the size of the opening angle of the shell are determined according to parameters such as the floating ball buoyancy, the air column pressure, the floating ball gravity, the cross section area of the branch pipe and the like, and the opening angle of the shell is controlled to be about 30 degrees. The hollow floating ball can be quickly and effectively blocked in the water filling process, and can effectively fall into the tray after water pumping. After the floating ball floats upwards, the force of the floating ball is analyzed, and the following conditions are met:
ρgV≥mg+p0S+f (3)
in formula (3), ρ is the density of water, 1g/cm3；
g-gravitational acceleration, is 9.8m/s2；
V-volume of hollow floating ball submerged in water, m3；
m is the mass of the floating ball, kg;
p0-the air column pressure is 0.1 Mpa;
s-area of cross section of lower branch pipe of tee pipe fitting, m2；
f is the downward component of the friction force between the shell and the hollow floating ball, N.
(4) After each part is assembled, the high-pressure water flow can be controlled to test the sealing property of the joint of each part, the sealing property is good, and the high-pressure water flow can be put into use after the high-pressure water flow is qualified in the test. When the air pipe is used, one end of the air pipe is communicated with the air return connection roadway of the mining area of the abandoned mine, and the other end of the air pipe extends into the highest roof of the roadway which can form an air column in the water filling process.
(5) When the underground reservoir is filled with water, the water level reaches a certain elevation, the hollow floating ball floats upwards by means of buoyancy provided by water pressure to block the water path to ensure that the air column is discharged through the preset vent pipe until the water in the pipe is full and the air column in the water storage space is completely eliminated.
(6) After the underground reservoir finishes discharging water, accumulated water retained in the vent pipe can be accumulated at the low-lying position of the pipeline to form water resistance, when the water level of the underground reservoir is lower than the inlet elevation of the vent pipe, the hollow floating ball falls into the tray under the action of gravity, and accumulated water formed in part of the vent pipe laid at the low-lying position is automatically drained, so that the influence of the water resistance formed by the accumulated water at the low-lying position of the vent pipe on secondary water filling is avoided, and the air column can be smoothly eliminated when the underground reservoir is filled with water again.
The present invention has been described above with reference to the accompanying drawings, as long as it is a variety of insubstantial improvements made by using the method concept and technical solutions of the present invention; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (5)
1. The utility model provides an underground reservoir air column remove device for abandoned mine which characterized in that: the three-way pipe fitting comprises a three-way pipe fitting with three ports a, b and c, wherein the port a is a vertically downward port of the three-way pipe fitting, a hollow annular truncated cone-shaped shell is arranged under the port a, the small end of the shell is connected with the port a in a sealing manner, the large end of the shell is sealed through a mesh tray, a floating ball is arranged in the shell, the outer diameter of the floating ball is larger than the inner diameter of the port a, and the floating ball can form a linear sealing structure with the inner wall of the shell or the port a under; and two ports b and c of the three-way pipe fitting are respectively connected with a vent pipe.
2. The underground reservoir air column elimination device for abandoned mine according to claim 1, characterized in that: the small end of the shell is in threaded fit and sealed connection with the port a, and the opening angle of the shell is 30 degrees.
3. The underground reservoir air column elimination device for abandoned mines according to claim 2, wherein: the floater is hollow floater, shell internal surface is equipped with the silica gel coating.
4. The underground reservoir air column elimination device for abandoned mines according to claim 2 or 3, wherein: and a silica gel sealing ring is arranged at the sealing matching position of the inner surface of the shell or the port a and the floating ball.
5. The underground reservoir air column elimination device for abandoned mines according to claim 4, wherein: the floating ball, the three-way pipe fitting, the shell, the net-shaped tray and the vent pipe are all made of stainless steel materials, and the surface of the floating ball is a chromium-plated layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022428195.3U CN213331190U (en) | 2020-10-26 | 2020-10-26 | Underground reservoir air column eliminating device for abandoned mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022428195.3U CN213331190U (en) | 2020-10-26 | 2020-10-26 | Underground reservoir air column eliminating device for abandoned mine |
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| Publication Number | Publication Date |
|---|---|
| CN213331190U true CN213331190U (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022428195.3U Expired - Fee Related CN213331190U (en) | 2020-10-26 | 2020-10-26 | Underground reservoir air column eliminating device for abandoned mine |
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| Country | Link |
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| CN (1) | CN213331190U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253246A (en) * | 2020-10-26 | 2021-01-22 | 河南理工大学 | Underground reservoir air column eliminating device and method for waste mine |
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2020
- 2020-10-26 CN CN202022428195.3U patent/CN213331190U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253246A (en) * | 2020-10-26 | 2021-01-22 | 河南理工大学 | Underground reservoir air column eliminating device and method for waste mine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210601 |