CN114183407A - Colliery is frozen water in pit and transports high-low pressure conversion equipment and mine refrigeration cooling system - Google Patents
Colliery is frozen water in pit and transports high-low pressure conversion equipment and mine refrigeration cooling system Download PDFInfo
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- CN114183407A CN114183407A CN202111481209.0A CN202111481209A CN114183407A CN 114183407 A CN114183407 A CN 114183407A CN 202111481209 A CN202111481209 A CN 202111481209A CN 114183407 A CN114183407 A CN 114183407A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 350
- 238000006243 chemical reaction Methods 0.000 title claims description 44
- 238000001816 cooling Methods 0.000 title claims description 32
- 238000005057 refrigeration Methods 0.000 title claims description 23
- 230000032258 transport Effects 0.000 title description 4
- 238000003860 storage Methods 0.000 claims description 226
- 230000007246 mechanism Effects 0.000 claims description 42
- 230000005540 biological transmission Effects 0.000 claims description 39
- 239000003245 coal Substances 0.000 claims description 23
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- 229910000831 Steel Inorganic materials 0.000 claims description 3
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- 230000003685 thermal hair damage Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F13/00—Pressure exchangers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F3/00—Cooling or drying of air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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Abstract
The invention belongs to the technical field of mining, and particularly relates to a high-low pressure conversion device for transporting underground chilled water of a coal mine and a mine refrigeration cooling system. The conversion device comprises a first high-pressure pipeline, a second high-pressure pipeline, a first low-pressure pipeline, a second low-pressure pipeline, a water storage cylinder body group, a first piston, a second piston, a connecting rod, a sine transmission mechanism and a main shaft; the sine transmission mechanism is fixed on the main shaft, and the rotation angular speed of the main shaft is periodically changed; the water storage cylinder group comprises a chilled water storage cylinder and a hot water storage cylinder, the chilled water storage cylinder is selectively communicated with a first high-pressure pipeline or a first low-pressure pipeline, and the hot water storage cylinder is selectively communicated with a second high-pressure pipeline or a second low-pressure pipeline; the first piston and the second piston are both rigidly connected with the sine transmission mechanism through a connecting rod. The conversion device provided by the invention can convert high-pressure chilled water into low-pressure chilled water with pressure meeting the use requirement of the air cooler, and can synchronously convert underground low-pressure hot water into high-pressure hot water.
Description
Technical Field
The invention belongs to the technical field of mining, and particularly relates to a high-low pressure conversion device for transporting underground chilled water of a coal mine and a mine refrigeration cooling system.
Background
In recent years, the problem of high temperature thermal damage of mines is increasingly prominent with the increase of mining depth of the mines. According to the linear distribution mode of the geothermal field of deep mines in China, the original rock temperature is estimated to reach 95 ℃ when the mining depth reaches 3000 meters. When the mine is operated in the high-temperature environment, the physical health of workers is threatened, and the working efficiency is seriously reduced, so that the safety production of the mine is greatly restricted. The conventional ventilation measures such as increasing the air volume and the like are adopted, so that the cooling requirement of the high-temperature deep well cannot be met, and the artificial refrigeration cooling measures are required to be adopted at the same time, namely, an artificial refrigeration cooling system is established to cool down the underground air flow.
Because the problem of difficult heat extraction can be faced when the centralized refrigeration unit is installed underground, most mines usually choose to install the centralized refrigeration unit on the ground and then use a transportation pipeline to transport the chilled water underground. In the process of conveying chilled water to the underground through a conveying pipeline, the static pressure of the water far exceeds the pressure bearing range of an air cooler, so that high-pressure chilled water needs to be converted into low-pressure chilled water and then conveyed to a cold using place. The traditional chilled water pressure reduction mode of building a water storage tank and installing a pressure reducing valve has the problems of large loss of cold energy, difficulty in controlling pipeline pressure fluctuation, difficulty in device equipment management and the like, and greatly restricts the operation effect of a mine refrigeration cooling system.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a high-low pressure conversion device for transporting underground chilled water of a coal mine and a mine refrigeration cooling system, which are used for solving or relieving the problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
a colliery is high low pressure conversion equipment of refrigerated water transport in the pit, the said conversion equipment includes the first high-pressure pipeline, second high-pressure pipeline, first low-pressure pipeline, second low-pressure pipeline, water storage cylinder block, first piston, second piston, tie rod, sine drive mechanism and main axis; the sine transmission mechanism is fixedly arranged on the main shaft, and the rotation angular speed of the main shaft is periodically changed;
the water storage cylinder group comprises a chilled water storage cylinder and a hot water storage cylinder which are arranged on two sides of the main shaft, the chilled water storage cylinder is selectively communicated with the first high-pressure pipeline or the first low-pressure pipeline, and the hot water storage cylinder is selectively communicated with the second high-pressure pipeline or the second low-pressure pipeline;
the first piston and the second piston are respectively arranged in the chilled water storage cylinder body and the hot water storage cylinder body, are rigidly connected with the sine transmission mechanism through connecting rods and can reciprocate in the corresponding water storage cylinder bodies under the driving of the main shaft and the sine transmission mechanism;
the first piston is provided with a first position and a second position in the moving process of the first piston in the chilled water storage cylinder body, when the first piston is at the first position, the chilled water storage cylinder body is communicated with the first high-pressure pipeline, and when the first piston is at the second position, the chilled water storage cylinder body is communicated with the first low-pressure pipeline;
the second piston is provided with a third position and a fourth position in the moving process of the second piston in the hot water storage cylinder body, when the second piston is at the third position, the hot water storage cylinder body is communicated with the second high-pressure pipeline, and when the second piston is at the fourth position, the hot water storage cylinder body is communicated with the second low-pressure pipeline.
Optionally, the conversion device further comprises a first valve element which is an electromagnetic valve and has three ports, and the three ports are respectively connected with the chilled water storage cylinder, the first high-pressure pipeline and the second low-pressure pipeline; when the first piston is at the first position, the electromagnetic valve is communicated with the chilled water storage cylinder body and the first high-pressure pipeline, and when the first piston is at the second position, the electromagnetic valve is communicated with the chilled water storage cylinder body and the first low-pressure pipeline.
Optionally, a sensor is arranged on the main shaft and used for monitoring a rotation phase of the main shaft, and the sensor is in signal connection with the electromagnetic valve through a controller; defining the rotation phase of the main shaft to be A when the first piston is at the first position, and the rotation phase of the main shaft to be B when the first piston is at the second position, wherein the difference between A and B is 180 degrees; when the sensor monitors that the rotation phase of the main shaft is A, the electromagnetic valve is controlled to be communicated with the chilled water storage cylinder body and the first high-pressure pipeline, and when the sensor monitors that the rotation phase of the main shaft is B, the electromagnetic valve is controlled to be communicated with the chilled water storage cylinder body and the first low-pressure pipeline.
Optionally, the first position is one end of the chilled water storage cylinder body far away from the main shaft, and the second position is one end of the chilled water storage cylinder body near the main shaft.
Optionally, the conversion device further includes a second valve element, the second valve element includes a first one-way stop valve and a second one-way stop valve, one port of the first one-way stop valve is connected to the hot water storage cylinder, the other port of the first one-way stop valve is connected to the second high-pressure pipeline, one port of the second one-way stop valve is connected to the hot water storage cylinder, and the other port of the second one-way stop valve is connected to the second low-pressure pipeline; when the second piston is at the third position, the hot water storage cylinder body is communicated with the second high-pressure pipeline through the first one-way stop valve, and is communicated with the second low-pressure pipeline through the second one-way stop valve at the fourth position.
Preferably, when the second piston is at the third position, the water pressure in the hot water storage cylinder is higher than the water pressure in the second high-pressure pipeline, and when the second piston is at the fourth position, the water pressure in the hot water storage cylinder is lower than the water pressure in the second low-pressure pipeline.
Optionally, the sinusoidal drive mechanism comprises:
one end of the crank is fixedly connected to the main shaft and can rotate along with the main shaft at an angular speed which is periodically changed;
the guide piece is fixedly connected with the connecting rod and provided with a guide groove;
the sliding rod is fixedly arranged at the other end of the crank and is positioned in the guide groove, and the sliding rod can slide in the guide groove under the driving of the main shaft and the crank.
Preferably, the connecting rod comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is fixedly connected with the first piston, the other end of the first connecting rod is fixedly connected with the guide piece, one end of the second connecting rod is fixedly connected with the second piston, and the other end of the second connecting rod is connected with the guide piece.
More preferably, the main shaft and the sinusoidal transmission mechanism are both made of wear-resistant steel, and the crank and the main shaft are of an integral structure.
Optionally, the chilled water storage cylinder, the hot water storage cylinder, the first piston, and the second piston are all made of a heat insulating material.
Preferably, the main shaft is further sleeved with a plurality of bearings, and the plurality of bearings are distributed at intervals along the length direction of the main shaft and used for mounting the main shaft.
Optionally, the number of the water storage cylinder groups is multiple, the multiple water storage cylinder groups are distributed at intervals along the length direction of the main shaft, and each water storage cylinder group comprises a chilled water storage cylinder and a hot water storage cylinder which are arranged on two sides of the main shaft; correspondingly, the sine transmission mechanisms are provided with a plurality of sine transmission mechanisms which are fixed on the main shaft at intervals and are rigidly connected with the pistons in the corresponding water storage cylinders through connecting rods.
Preferably, the water storage cylinder groups are three, and included angles between cranks of two adjacent sine transmission mechanisms are 120 degrees.
The invention also provides a mine refrigeration cooling system which comprises the underground coal mine chilled water transportation high-low pressure conversion device.
Optionally, the mine refrigeration cooling system further comprises an aboveground chilled water storage tank, a refrigerating unit, a cooling tower, an underground chilled water storage tank and an underground hot water storage tank; wherein,
the aboveground chilled water storage tank, the refrigerating unit and the cooling tower are sequentially connected, the aboveground chilled water storage tank is connected with a first high-pressure pipeline in the conversion device, and the cooling tower is connected with a second high-pressure pipeline in the conversion device to form a high-pressure water circulating system; the underground chilled water storage tank is connected with a first low-pressure pipeline in the conversion device, and the underground hot water storage tank is connected with a second low-pressure pipeline in the conversion device, so that a low-pressure water circulation system is formed.
Has the advantages that:
(1) the high-low pressure conversion device for transporting the underground chilled water in the coal mine can convert the high-pressure chilled water into the low-pressure chilled water with the pressure meeting the use requirement of the air cooler, simultaneously can synchronously convert the underground low-pressure hot water into the high-pressure hot water, and then conveys the high-pressure hot water to the ground through the high-pressure pipeline, thereby realizing the continuous and stable operation of high-low pressure water circulation in a mine refrigeration cooling system.
(2) The high-low pressure conversion device for transporting the underground chilled water in the coal mine has the advantages of high conversion efficiency, low cold loss, good safety performance and the like, and is beneficial to preventing and treating the heat damage of the coal mine.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a three-dimensional schematic diagram of a high-low pressure conversion device for transporting chilled water in a coal mine according to an embodiment of the invention;
FIG. 2 is a schematic view of the spindle, sinusoidal drive mechanism and link of FIG. 1 after assembly;
FIG. 3 is a schematic structural view of another view angle of the spindle, sine transmission mechanism, connecting rod, chilled water storage cylinder, hot water storage cylinder and valve member of FIG. 1 after assembly;
FIG. 4 is a two-dimensional schematic diagram of a coal mine underground chilled water transportation high-low pressure conversion device according to an embodiment of the invention;
fig. 5 is a schematic system operation diagram of the underground coal mine chilled water transportation high-low pressure conversion device applied to a mine refrigeration cooling system.
Reference numbers in the figures: 01-a first low-pressure line; 02-a second low pressure line; 03-a first high-pressure line; 04-a second high-pressure pipeline; 05-a main shaft; 06-sine transmission mechanism; 06 a-crank; 06 b-a guide; 06 c-sliding bar; 06 d-a guide groove; 07-an electromagnetic valve; 08-connecting rod; 08 a-first link; 08 b-a second link; 09 a-a first piston; 09b — a second piston; 10-a bearing; 11, 13, 15-chilled water storage tank body; 12, 14, 16-hot water storage tank; 17-a refrigeration unit; 18-an aboveground chilled water storage tank; 19-underground chilled water storage pool; 20-underground hot water storage tank; 21-a cooling tower; 22-conveying a high-low pressure conversion device by using underground chilled water of a coal mine; 23-one-way stop valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Aiming at the technical problems in the prior art, the invention provides the underground chilled water transportation high-low pressure conversion device 22 for the coal mine, which has the advantages of small loss of cooling capacity, capability of keeping the pressure and the flow in a transportation pipeline stable, capability of ensuring that the flow of high-pressure water in the device is equal to that of low-pressure water, good safety performance, capability of meeting the underground fireproof and explosion-proof requirements, simplicity in operation, convenience in management and capability of ensuring the continuous and stable operation of a mine refrigeration cooling system.
As shown in fig. 1 to 4, in the embodiment of the present invention, the underground chilled water transportation high-pressure and low-pressure conversion device 22 for a coal mine comprises a first high-pressure pipeline 03, a second high-pressure pipeline 04, a first low-pressure pipeline 01, a second low-pressure pipeline 02, a water storage cylinder group, a first piston 09a, a second piston 09b, a connecting rod 08, a sinusoidal transmission mechanism 06, and a main shaft 05; wherein, the rotation angular velocity of the main shaft 05 is changed periodically, and the sine transmission mechanism 06 is fixedly arranged on the main shaft 05; the water storage cylinder group comprises a chilled water storage cylinder 11 (or 13 or 15) and a hot water storage cylinder 12 (or 14 or 16) which are arranged on two sides of the main shaft 05, the chilled water storage cylinder 11 (or 13 or 15) is selectively communicated with a first high-pressure pipeline 03 or a first low-pressure pipeline 01, and the hot water storage cylinder 12 (or 14 or 16) is selectively communicated with a second high-pressure pipeline 04 or a second low-pressure pipeline 02; the first piston 09a and the second piston 09b are respectively arranged on the chilled water storage cylinder 11 (or 13, or 15) and the hot water storage cylinder 12 (or 14, or 16), the first piston 09a and the second piston 09b are both rigidly connected with the sine transmission mechanism 06 through the connecting rod 08, and can be driven by the main shaft 05 and the sine transmission mechanism 06 to reciprocate in the corresponding water storage cylinders; the first piston 09a has a first position and a second position in the moving process of the chilled water storage cylinder 11 (or 13, or 15), when the first piston 09a is at the first position, the chilled water storage cylinder 11 (or 13, or 15) is communicated with the first high-pressure pipeline 03, and when the first piston 09a is at the second position, the chilled water storage cylinder 11 (or 13, or 15) is communicated with the first low-pressure pipeline 01; the second piston 09b has a third position and a fourth position during the movement of the hot water storage cylinder 12 (or 14, or 16), when the second piston 09b is at the third position, the hot water storage cylinder 12 (or 14, or 16) is communicated with the second high-pressure pipe 04, and when the second piston 09b is at the fourth position, the hot water storage cylinder 12 (or 14, or 16) is communicated with the second low-pressure pipe 02.
The chilled water storage cylinder 11 (or 13 or 15) and the hot water storage cylinder 12 (or 14 or 16) in the water storage cylinder group are separately arranged, so that the cold loss caused by the heat transfer effect between the chilled water and the hot water in the high-low pressure conversion process can be effectively reduced.
When the underground coal mine chilled water transportation high-low pressure conversion device 22 is used, the main shaft 05 rotates, the driving power of the main shaft 05 is usually a driving motor, and the rotation angular speed of the main shaft 05 is changed periodically under the action of the driving motor. Because the crank 06a of the sine transmission mechanism 06 is fixedly connected to the main shaft 05 and rigidly connected to the first piston 09a and the second piston 09b through the connecting rod 08, the sine transmission mechanism 06 rotates along with the main shaft 05, and the rotational angular velocity changes periodically, and the first piston 09a and the second piston 09b both make reciprocating linear movements with periodically changing velocity and direction in the corresponding water storage cylinder under the driving of the main shaft 05 and the sine transmission mechanism 06.
When the first piston 09a moves to the first position, the chilled water storage cylinder 11 (or 13, or 15) is selectively communicated with the first high-pressure pipeline 03 but not communicated with the first low-pressure pipeline 01, and at this time, the chilled water in the first high-pressure pipeline 03 flows into the chilled water storage cylinder 11 (or 13, or 15); when the first piston 09a moves to the second position, the chilled water storage cylinder 11 (or 13, or 15) is selectively communicated with the first low pressure pipe 01 but not communicated with the first high pressure pipe 03, and at this time, the chilled water in the chilled water storage cylinder 11 (or 13, or 15) flows into the first low pressure pipe 01. Therefore, the high-pressure chilled water can be converted into the low-pressure chilled water with the pressure meeting the use requirement of the air cooler.
When the second piston 09b moves to the third position, the hot water storage cylinder 12 (or 14, or 16) selectively communicates with the second high-pressure line 04 but does not communicate with the second low-pressure line 02, and at this time, the hot water in the hot water storage cylinder 12 (or 14, or 16) flows into the second high-pressure line 04; when the second piston 09b moves to the fourth position, the hot water storage cylinder 12 (or 14 or 16) selectively communicates with the second low pressure line 02 and does not communicate with the second high pressure line 04, and at this time, the hot water in the second low pressure line 02 flows into the hot water storage cylinder 12 (or 14 or 16). Therefore, underground low-pressure hot water can be synchronously converted into high-pressure hot water.
Alternatively, one end of the connecting rod 08 penetrates through one side of the chilled water storage cylinder 11 (or 13 or 15) close to the main shaft 05 and is connected to the first piston 09a in the chilled water storage cylinder 11 (or 13 or 15), and the other end penetrates through one side of the hot water storage cylinder 12 (or 14 or 16) close to the main shaft 05 and is connected to the second piston 09b in the hot water storage cylinder 12 (or 14 or 16).
In an optional embodiment of the invention, the electromagnetic valve 07 of the T-shaped three-way valve is adopted to control the inlet and outlet of the chilled water in the chilled water storage cylinder 11 (or 13 or 15), and meanwhile, the chilled water storage cylinder 11 (or 13 or 15) is selectively communicated with the first high-pressure pipeline 03 or the first low-pressure pipeline 01 through the electromagnetic valve 07. The one-way stop valve 23 is used to control the inlet and outlet of the hot water in the hot water storage cylinder 12 (or 14 or 16), and the hot water storage cylinder 12 (or 14 or 16) is selectively communicated with the second high-pressure pipeline 04 or the second low-pressure pipeline 02 through the two one-way stop valves 23.
In the embodiment of the present invention, the switching device 22 further includes a first valve element, which is an electromagnetic valve 07 and has three ports, and the three ports are respectively connected to the chilled water storage cylinder 11 (or 13, or 15), the first high-pressure pipeline 03 and the second low-pressure pipeline 02; when the first piston 09a is at the first position, the electromagnetic valve 07 is communicated with the chilled water storage cylinder 11 (or 13 or 15) and the first high-pressure pipeline 03, and when the first piston 09a is at the second position, the electromagnetic valve 07 is communicated with the chilled water storage cylinder 11 (or 13 or 15) and the first low-pressure pipeline 01.
In an optional embodiment of the present invention, a sensor (not shown) is disposed on the spindle 05, and is configured to monitor a rotation phase of the spindle 05, and the sensor is in signal connection with the electromagnetic valve 07 through a controller; defining the rotation phase of the main shaft 05 as A when the first piston 09a is at the first position, and the rotation phase of the main shaft 05 as B when the first piston 09a is at the second position, so that the difference between A and B is 180 degrees; when the sensor monitors that the rotation phase of the main shaft 05 is A, the control electromagnetic valve 07 is communicated with the chilled water storage cylinder 11 (or 13 or 15) and the first high-pressure pipeline 03, and when the sensor monitors that the rotation phase of the main shaft 05 is B, the control electromagnetic valve 07 is communicated with the chilled water storage cylinder 11 (or 13 or 15) and the first low-pressure pipeline 01.
It should be noted that the sensor is a phase sensor, which can sense the rotation phase of the spindle 05, and the type of the phase sensor is the existing sensor, which can be the type of the existing phase sensor. In the specific process, the sensor uploads a monitored rotation phase signal of the spindle 05 to the controller, and the controller controls the opening or closing of the electromagnetic valve 07 according to the signal. The controller may be disposed on the electromagnetic valve 07, or may be disposed separately, and the signal connection may be a wireless connection through a local area network, or a wired connection through a signal line, which are not limited herein, and are within the protection scope of the present invention.
The first position of the invention is the end of the chilled water storage cylinder 11 (or 13 or 15) far away from the main shaft 05, and the second position is the end of the chilled water storage cylinder 11 (or 13 or 15) near the main shaft 05.
In this embodiment, the opening or closing of the electromagnetic valve 07 is controlled by a sensor on the main shaft 05, specifically, the port of the electromagnetic valve 07 connected to the chilled water storage cylinder 11 (or 13, or 15) is always opened, and the port connected to the first high-pressure pipeline 03 and the port connected to the first low-pressure pipeline 01 are selectively opened or closed, and the opening or closing thereof is controlled by a sensor on the main shaft 05. Specifically, when the main shaft 05 rotates to a rotation phase a, the first piston 09a just moves to a first position (i.e., one end of the chilled water storage cylinder 11 (or 13, or 15) away from the main shaft 05), at this time, the port of the electromagnetic valve 07 connected to the first high-pressure pipeline 03 is opened, and the port connected to the first low-pressure pipeline 01 is closed, so that the first high-pressure pipeline 03 is communicated with the chilled water storage cylinder 11 (or 13, or 15), and chilled water in the first high-pressure pipeline 03 flows into the chilled water storage cylinder 11 (or 13, or 15); when the spindle 05 rotates to a rotation phase B, the first piston 09a just moves to a second position (i.e., one end of the chilled water storage cylinder 11 (or 13, or 15) close to the spindle 05), at this time, the port of the electromagnetic valve 07 connected to the first low-pressure pipeline 01 is opened, and the port connected to the first high-pressure pipeline 03 is closed, so that the first pipeline is communicated with the chilled water storage cylinder 11 (or 13, or 15), and chilled water in the chilled water storage cylinder 11 (or 13, or 15) flows into the first low-pressure pipeline 01. Therefore, the high-pressure chilled water can be converted into low-pressure chilled water with pressure meeting the use requirement of the air cooler.
In an alternative embodiment of the present invention, the switching device 22 further includes a second valve member, the second valve member includes a first one-way stop valve 23 and a second one-way stop valve 23, one port of the first one-way stop valve 23 is connected to the hot water storage cylinder 12 (or 14 or 16), the other port is connected to the second high-pressure pipeline 04, one port of the second one-way stop valve 23 is connected to the hot water storage cylinder 12 (or 14 or 16), and the other port is connected to the second low-pressure pipeline 02; when the second piston 09b is at the third position, the hot water storage cylinder 12 (or 14 or 16) is communicated with the second high-pressure pipeline 04 through the first one-way stop valve 23, and when the second piston 09b is at the fourth position, the hot water storage cylinder 12 (or 14 or 16) is communicated with the second low-pressure pipeline 02 through the second one-way stop valve 23.
In this embodiment, the first one-way stop valve 23 and the second one-way stop valve 23 are in one-way communication, and the opening or closing of the two one-way stop valves is controlled by the fluid pressure difference between the two sides of the valve.
It should be noted that, the third position of the present invention is a position where the water pressure of the hot water storage cylinder 12 (or 14, or 16) is greater than the water pressure in the second high-pressure pipeline 04, the fourth position is a position where the water pressure of the hot water storage cylinder 12 (or 14, or 16) is less than the water pressure in the second low-pressure pipeline 02, that is, when the second piston 09b is at the third position, the water pressure in the hot water storage cylinder 12 (or 14, or 16) is greater than the water pressure in the second high-pressure pipeline 04, and when the second piston 09b is at the fourth position, the water pressure in the hot water storage cylinder 12 (or 14, or 16) is less than the water pressure in the second low-pressure pipeline 02.
Specifically, when the second piston 09b moves to a side away from the main shaft 05 (i.e., the second high-pressure pipeline 04 side), the water pressure in the hot water storage cylinder 12 (or 14, or 16) gradually increases, when the water pressure moving to the hot water storage cylinder 12 (or 14, or 16) is greater than the water pressure in the second high-pressure pipeline 04 (i.e., the third position), the one-way stop valve 23 (i.e., the first one-way stop valve 23) connecting the hot water storage cylinder 12 (or 14, or 16) and the second high-pressure pipeline 04 is automatically opened, the second high-pressure pipeline 04 is communicated with the hot water storage cylinder 12 (or 14, or 16), and the hot water in the hot water storage cylinder 12 (or 14, or 16) flows into the second high-pressure pipeline 04; when the second piston 09b moves towards the side close to the spindle 05, the water pressure in the water storage cylinder body gradually decreases, when the water pressure in the hot water storage cylinder body 12 (or 14 or 16) is lower than the water pressure in the second low-pressure pipeline 02, the one-way stop valve 23 (namely, the second one-way stop valve 23) connecting the hot water storage cylinder body 12 (or 14 or 16) and the second low-pressure pipeline 02 is automatically opened, the second low-pressure pipeline 02 is communicated with the hot water storage cylinder body 12 (or 14 or 16), and hot water in the second low-pressure pipeline 02 flows into the hot water storage cylinder body 12 (or 14 or 16). Therefore, the underground low-pressure hot water can be synchronously converted into the high-pressure hot water.
As shown in fig. 3, in an alternative embodiment of the present invention, the sinusoidal transmission mechanism 06 includes a crank 06a, a guide 06b, and a sliding rod 06c, one end of the crank 06a is fixedly connected to the main shaft 05 and can rotate with the main shaft 05 at an angular velocity that varies periodically; the guide piece 06b is fixedly connected with the connecting rod 08, and the guide piece 06b is provided with a guide groove 06 d; the sliding rod 06c is fixedly arranged at the other end of the crank 06a and is positioned in the guide groove 06d, and the sliding rod 06c can slide in the guide groove 06d under the driving of the main shaft 05 and the crank 06 a.
In this embodiment, the length direction of the sliding rod 06c is perpendicular to the length direction of the crank 06a, the guide piece 06b is substantially in the shape of a long rod, the guide groove 06d extends along the length direction thereof, and is perpendicular to the length direction of the connecting rod 08, and the sliding rod 06c can slide linearly in a reciprocating manner along the length direction thereof in the guide groove 06d under the driving of the main shaft 05 and the crank 06 a.
As shown in fig. 3, the connecting rod 08 preferably includes a first connecting rod 08a and a second connecting rod 08b, the first connecting rod 08a has one end fixedly connected to the first piston 09a and the other end 08b fixedly connected to the guide 06b, and the second connecting rod 08b has one end fixedly connected to the second piston 09b and the other end connected to the guide 06 b. With such an arrangement, the first connecting rod 08a and the second connecting rod 08b and the pistons connected with the first connecting rod 08a and the second connecting rod 08b respectively make reciprocating linear motion with a periodically changing speed under the driving of the main shaft 05 and the sine transmission mechanism 06.
It should be noted that, in order to ensure the reliability of the sliding process of the sliding rod 06c in the guide groove 06d, two cranks 06a are provided, the two cranks 06a are relatively arranged in parallel, the sliding rod 06c is provided between the two cranks 06a, and two ends of the sliding rod 06c are respectively fixedly connected to the two cranks 06 a. Optionally, the ends of the two cranks 06a far away from the main shaft 05 are provided with mounting holes (not marked), the size of the mounting holes is matched with that of the sliding rod 06c, and during assembly, the two ends of the sliding rod 06c are respectively inserted and fixed into the two mounting holes.
In the embodiment of the invention, the main shaft 05 and the sine transmission mechanism 06 are both made of wear-resistant steel, and the crank 06a and the main shaft 06a are of an integral structure, so that the structural firmness of the crank can be ensured, and the service life of the crank is greatly prolonged.
In an optional embodiment of the invention, the chilled water storage cylinder 11 (or 13 or 15), the hot water storage cylinder 12 (or 14 or 16), the first piston 09a and the second piston 09b are all made of heat insulating materials, so that the loss of cold energy caused by heat transfer during the high-low pressure conversion process of the chilled water and the hot water can be greatly reduced.
As shown in fig. 1 to 3, the main shaft 05 is further sleeved with a plurality of bearings 10, and the plurality of bearings 10 are distributed at intervals along the length direction of the main shaft 05 and used for mounting the main shaft 05. During the specific installation, the bearing 10 cover is located the outside of main shaft 05, and the inner circle fixed connection of bearing 10 is in main shaft 05, and the outer lane is with the part fixed connection who is used for installing main shaft 05, can effectively reduce the friction of main shaft 05 rotation in-process like this.
Referring to fig. 1 again, in an alternative embodiment of the present invention, a plurality of water storage cylinder groups are provided, the plurality of water storage cylinder groups are distributed at intervals along the length direction of the main shaft 05, and each water storage cylinder group includes a chilled water storage cylinder 11 (or 13, or 15) and a hot water storage cylinder 12 (or 14, or 16) disposed at both sides of the main shaft 05; correspondingly, a plurality of sine transmission mechanisms 06 are arranged, and the plurality of sine transmission mechanisms 06 are fixed on the main shaft 05 at intervals and are rigidly connected with the pistons 09 in the corresponding water storage cylinders through the connecting rods 08. Preferably, the water storage cylinder groups are three, and the included angles between the cranks of two adjacent sine transmission mechanisms 06 are all 120 degrees.
In this embodiment, three water storage cylinder groups are provided, that is, three pairs of chilled water storage cylinders 11 (or 13, or 15) and hot water storage cylinders 12 (or 14, or 16), where the chilled water storage cylinders 11 and the hot water storage cylinders 12 are paired, the chilled water storage cylinders 13 and the hot water storage cylinders 14 are paired, and the chilled water storage cylinders 15 and the hot water storage cylinders 16 are paired. A first piston 09a is arranged in each chilled water storage cylinder 15 close to the side of the main shaft 05, a second piston 09b is arranged in each hot water storage cylinder 16 close to the side of the main shaft 05, the first piston 09a and the second piston 09b in each pair of water storage cylinders are rigidly connected with the sinusoidal transmission mechanism 06 through the connecting rod 08, an included angle between cranks of two adjacent sinusoidal transmission mechanisms 06 is 120 degrees, the rotational phases of two adjacent sinusoidal transmission mechanisms 06 are different by 120 degrees, the first piston 09a and the second piston 09b in each pair of water storage cylinders perform reciprocating linear motion with periodically changed speed and direction under the driving of the sinusoidal transmission mechanisms 06, and the moving phases of the pistons in each pair of adjacent water storage cylinders are different by 120 degrees.
It should be understood that compared with the operation of a single pair of water storage cylinders, the three pairs of water storage cylinders are set to operate together, on one hand, the pressure relief efficiency of the high-pressure chilled water is effectively improved, but more importantly, the total water volume in the three pairs of water storage cylinders is constant at any moment by combining the setting of the 120-degree difference value of the rotation phase between the adjacent sinusoidal transmission mechanisms 06 and the setting of the periodical change of the rotation angular velocity of the main shaft 05, which also means that the size and the direction of the water flow in each high-low pressure pipeline communicated with the water storage cylinders are invariable all the time, so that the impact effect on the conveying pipeline caused by the change of the fluid flow is avoided, and the key of the device for realizing the continuous and stable operation of the high-low pressure water circulation in the mine refrigeration cooling system is also realized.
The invention also provides a mine refrigeration cooling system which comprises the underground coal mine chilled water transportation high-low pressure conversion device 22.
As shown in fig. 5, in an alternative embodiment of the present invention, the mine refrigeration cooling system further includes an aboveground chilled water storage tank 18, a refrigeration unit 17, a cooling tower 21, an underground chilled water storage tank 19, and an underground hot water storage tank 20; the aboveground chilled water storage tank 18, the refrigerating unit 17 and the cooling tower 21 are sequentially connected, the aboveground chilled water storage tank 18 is connected with a first high-pressure pipeline 03 in the conversion device 22, and the cooling tower 21 is connected with a second high-pressure pipeline 04 in the conversion device 22, so that a high-pressure water circulating system is formed; the underground chilled water storage tank 19 is connected with a first low-pressure pipeline 01 in the conversion device 22, and the underground hot water storage tank 20 is connected with a second low-pressure pipeline 02 in the conversion device 22, so that a low-pressure water circulation system is formed.
It should be noted that water pumps (not shown) are disposed on the pipeline connecting the aboveground chilled water storage tank 18 and the first high-pressure pipeline 03, the pipeline connecting the cooling tower 21 and the refrigerating unit 17, and the pipeline connecting the underground hot water storage tank 20 and the second low-pressure pipeline 02.
The operation of the high-pressure water circulation system will be described in detail below by taking a single pair of water storage cylinders (i.e., the chilled water storage cylinder 11 and the hot water storage cylinder 12) as an example.
The chilled water in the above-well chilled water storage tank 18 is conveyed to the underground through the first high-pressure pipeline 03 under the action of a water pump, and in the process, the potential energy of the water is converted into the static pressure of the water to form high-pressure chilled water. First piston 09a is driven by main shaft 05 and sinusoidal transmission mechanism 06 to make reciprocating linear motion with speed and direction periodically changing, when main shaft 05 rotates to the rotation phase A, first piston 09a moves to the first position just this moment (namely the one end of chilled water storage cylinder 11 far away from main shaft 05), under the control of the sensor on main shaft 05, the port that solenoid valve 07 connects first high-pressure pipeline 03 opens, and the port that connects first low-pressure pipeline 01 closes, first high-pressure pipeline 03 communicates with chilled water storage cylinder 11, the chilled water in first high-pressure pipeline 03 flows into chilled water storage cylinder 11, thereby the pressure relief process of high-pressure chilled water has been realized. Meanwhile, when the second piston 09b is driven by the spindle 05 and the sinusoidal transmission mechanism 06 to move to a side away from the spindle 05 (i.e., the second high-pressure pipeline 04 side), the water pressure in the hot water storage cylinder 12 gradually increases, when the water pressure moving to the hot water storage cylinder 12 is greater than the water pressure in the second high-pressure pipeline 04 (i.e., the third position), the one-way stop valve 23 (i.e., the first one-way stop valve 23) connecting the hot water storage cylinder 12 and the second high-pressure pipeline 04 is automatically opened, the second high-pressure pipeline 04 is communicated with the hot water storage cylinder 12, and the hot water in the hot water storage cylinder 12 flows into the second high-pressure pipeline 04, so that the boosting process of the low-pressure hot water is realized. The high-pressure hot water is sequentially conveyed to a cooling tower 21 and a refrigerating unit 17 on the ground through a second high-pressure pipeline, is changed into chilled water, and is stored in an aboveground chilled water storage tank 18.
The operation of the low pressure water circulation system will be described in detail below by taking a single pair of water storage cylinders (i.e., the chilled water storage cylinder 11 and the hot water storage cylinder 12) as an example.
The first piston 09a is driven by the sine transmission mechanism to continuously move, when the spindle 05 rotates to a rotation phase B, the first piston 09a just moves to a second position (namely, one end of the chilled water storage cylinder 11, which is close to the spindle 05), at the moment, the electromagnetic valve 07 is connected with the port of the first low-pressure pipeline 01 to be opened, the port of the first high-pressure pipeline 03 to be closed, the first pipeline is communicated with the chilled water storage cylinder 11, chilled water in the chilled water storage cylinder 11 formed after pressure relief flows into the first low-pressure pipeline 01, is conveyed to the underground chilled water storage tank 19 through the first low-pressure pipeline 01, and then is conveyed to air coolers at various underground cold-requiring positions. The low-pressure chilled water is changed into low-pressure hot water after heat exchange with a heat source in a cold using place, the low-pressure hot water is stored in the underground hot water storage tank 20 in a centralized mode, the low-pressure hot water in the underground hot water storage tank 20 flows into the second low-pressure pipeline 02 under the action of the water pump, at the moment, when the second piston 09b moves towards one side close to the spindle 05, the water pressure in the water storage cylinder body is gradually reduced, when the water pressure in the hot water storage cylinder body 12 is smaller than the water pressure in the second low-pressure pipeline 02, the one-way stop valve 23 (namely, the second one-way stop valve 23) for connecting the hot water storage cylinder body 12 with the second low-pressure pipeline 02 is automatically opened, the second low-pressure pipeline 02 is communicated with the hot water storage cylinder body 12, and the hot water in the second low-pressure pipeline 02 flows into the hot water storage cylinder body 12.
The three water storage cylinder bodies are arranged to improve the pressure relief efficiency of the device on high-pressure chilled water, and more importantly, the total water amount in the three water storage cylinder bodies is constant at any moment by combining the arrangement of a 120-degree difference value of rotation phases between adjacent sine transmission mechanisms 06 and the arrangement of periodic variation of the rotation angular speed of the main shaft 05, which means that the water flow rate and direction in each high-pressure and low-pressure pipeline communicated with the water storage cylinder bodies are invariable all the time, so that the impact effect on a conveying pipeline caused by the variation of the fluid flow rate is avoided, and the continuous and stable operation of high-pressure and low-pressure water circulation in a refrigeration mine cooling system is further ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The coal mine underground chilled water transportation high-low pressure conversion device is characterized by comprising a first high-pressure pipeline, a second high-pressure pipeline, a first low-pressure pipeline, a second low-pressure pipeline, a water storage cylinder body group, a first piston, a second piston, a connecting rod, a sine transmission mechanism and a main shaft; the sine transmission mechanism is fixedly arranged on the main shaft, and the rotation angular speed of the main shaft is periodically changed;
the water storage cylinder group comprises a chilled water storage cylinder and a hot water storage cylinder which are arranged on two sides of the main shaft, the chilled water storage cylinder is selectively communicated with the first high-pressure pipeline or the first low-pressure pipeline, and the hot water storage cylinder is selectively communicated with the second high-pressure pipeline or the second low-pressure pipeline;
the first piston and the second piston are respectively arranged in the chilled water storage cylinder body and the hot water storage cylinder body, are rigidly connected with the sine transmission mechanism through connecting rods and can reciprocate in the corresponding water storage cylinder bodies under the driving of the main shaft and the sine transmission mechanism;
the first piston is provided with a first position and a second position in the moving process of the first piston in the chilled water storage cylinder body, when the first piston is at the first position, the chilled water storage cylinder body is communicated with the first high-pressure pipeline, and when the first piston is at the second position, the chilled water storage cylinder body is communicated with the first low-pressure pipeline;
the second piston is provided with a third position and a fourth position in the moving process of the second piston in the hot water storage cylinder body, when the second piston is at the third position, the hot water storage cylinder body is communicated with the second high-pressure pipeline, and when the second piston is at the fourth position, the hot water storage cylinder body is communicated with the second low-pressure pipeline.
2. The underground chilled water transportation high-low pressure conversion device for the coal mine according to claim 1, further comprising a first valve, wherein the first valve is an electromagnetic valve and is provided with three ports, and the three ports are respectively connected with the chilled water storage cylinder, the first high-pressure pipeline and the second low-pressure pipeline;
when the first piston is at the first position, the electromagnetic valve is communicated with the chilled water storage cylinder body and the first high-pressure pipeline, and when the first piston is at the second position, the electromagnetic valve is communicated with the chilled water storage cylinder body and the first low-pressure pipeline.
3. The underground chilled water transportation high-low pressure conversion device for the coal mine according to claim 2, wherein a sensor is arranged on the main shaft and used for monitoring the rotation phase of the main shaft, and the sensor is in signal connection with the electromagnetic valve through a controller;
defining the rotation phase of the main shaft to be A when the first piston is at the first position, and the rotation phase of the main shaft to be B when the first piston is at the second position, wherein the difference between A and B is 180 degrees;
when the sensor monitors that the rotation phase of the main shaft is A, the electromagnetic valve is controlled to be communicated with the chilled water storage cylinder body and the first high-pressure pipeline, and when the sensor monitors that the rotation phase of the main shaft is B, the electromagnetic valve is controlled to be communicated with the chilled water storage cylinder body and the first low-pressure pipeline.
4. The underground coal mine chilled water transportation high-low pressure conversion device according to claim 3, wherein the first position is one end of the chilled water storage cylinder body far away from the main shaft, and the second position is one end of the chilled water storage cylinder body close to the main shaft.
5. The underground chilled water transportation high-low pressure conversion device for the coal mine according to claim 1, wherein the conversion device further comprises a second valve element, the second valve element comprises a first one-way stop valve and a second one-way stop valve, one port of the first one-way stop valve is connected with the hot water storage cylinder, the other port of the first one-way stop valve is connected with the second high-pressure pipeline, one port of the second one-way stop valve is connected with the hot water storage cylinder, and the other port of the second one-way stop valve is connected with the second low-pressure pipeline;
when the second piston is at the third position, the hot water storage cylinder body is communicated with the second high-pressure pipeline through the first one-way stop valve, and is communicated with the second low-pressure pipeline through the second one-way stop valve at the fourth position;
preferably, when the second piston is at the third position, the water pressure in the hot water storage cylinder is higher than the water pressure in the second high-pressure pipeline, and when the second piston is at the fourth position, the water pressure in the hot water storage cylinder is lower than the water pressure in the second low-pressure pipeline.
6. The underground coal mine chilled water transportation high-low pressure conversion device according to claim 1, wherein the sine transmission mechanism comprises:
one end of the crank is fixedly connected to the main shaft and can rotate along with the main shaft at an angular speed which is periodically changed;
the guide piece is fixedly connected with the connecting rod and provided with a guide groove;
the sliding rod is fixedly arranged at the other end of the crank and is positioned in the guide groove, and the sliding rod can slide in the guide groove under the driving of the main shaft and the crank;
preferably, the connecting rod comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is fixedly connected with the first piston, the other end of the first connecting rod is fixedly connected with the guide piece, one end of the second connecting rod is fixedly connected with the second piston, and the other end of the second connecting rod is connected with the guide piece;
more preferably, the main shaft and the sinusoidal transmission mechanism are both made of wear-resistant steel, and the crank and the main shaft are of an integral structure.
7. The underground coal mine chilled water transportation high-low pressure conversion device according to claim 1, wherein the chilled water storage cylinder, the hot water storage cylinder, the first piston and the second piston are all made of heat insulating materials;
preferably, the main shaft is further sleeved with a plurality of bearings, and the plurality of bearings are distributed at intervals along the length direction of the main shaft and used for mounting the main shaft.
8. The underground coal mine chilled water transportation high-low pressure conversion device according to any one of claims 1 to 7, wherein a plurality of water storage cylinder groups are arranged, are distributed at intervals along the length direction of the main shaft, and each water storage cylinder group comprises a chilled water storage cylinder and a hot water storage cylinder which are arranged on two sides of the main shaft;
correspondingly, a plurality of sine transmission mechanisms are arranged and fixed on the main shaft at intervals and are rigidly connected with the pistons in the corresponding water storage cylinders through connecting rods;
preferably, the water storage cylinder groups are three, and included angles between cranks of two adjacent sine transmission mechanisms are 120 degrees.
9. A mine refrigeration cooling system, characterized by comprising the underground coal mine chilled water transportation high-low pressure conversion device as claimed in any one of claims 1 to 8.
10. The mine refrigeration cooling system of claim 9, further comprising an above-ground chilled water storage, a refrigeration unit, a cooling tower, a down-ground chilled water storage, and a down-ground hot water storage; wherein,
the aboveground chilled water storage tank, the refrigerating unit and the cooling tower are sequentially connected, the aboveground chilled water storage tank is connected with a first high-pressure pipeline in the conversion device, and the cooling tower is connected with a second high-pressure pipeline in the conversion device to form a high-pressure water circulating system;
the underground chilled water storage tank is connected with a first low-pressure pipeline in the conversion device, and the underground hot water storage tank is connected with a second low-pressure pipeline in the conversion device, so that a low-pressure water circulation system is formed.
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| CN202111481209.0A CN114183407B (en) | 2021-12-06 | 2021-12-06 | Colliery is frozen water in pit and transports high-low pressure conversion equipment and mine refrigeration cooling system |
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| CN202111481209.0A CN114183407B (en) | 2021-12-06 | 2021-12-06 | Colliery is frozen water in pit and transports high-low pressure conversion equipment and mine refrigeration cooling system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2161519A (en) * | 1984-05-22 | 1986-01-15 | Planorg Mernoki Iroda Gm | Apparatus and method for transporting liquid utilising the potential energy of an operating fluid |
| US5078544A (en) * | 1989-08-10 | 1992-01-07 | Siemag Transplan Gmbh | Arrangement for the changeover of liquids when transported by means of a three chamber tube feeder |
| CN104005784A (en) * | 2014-06-12 | 2014-08-27 | 中煤科工集团重庆研究院有限公司 | Cold and hot water pressure exchange system applied to deep heat damage mine |
| CN108915755A (en) * | 2018-08-28 | 2018-11-30 | 平顶山天安煤业股份有限公司 | A kind of double water storage room high-low pressure water converting systems and method for mine cooling |
-
2021
- 2021-12-06 CN CN202111481209.0A patent/CN114183407B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2161519A (en) * | 1984-05-22 | 1986-01-15 | Planorg Mernoki Iroda Gm | Apparatus and method for transporting liquid utilising the potential energy of an operating fluid |
| US5078544A (en) * | 1989-08-10 | 1992-01-07 | Siemag Transplan Gmbh | Arrangement for the changeover of liquids when transported by means of a three chamber tube feeder |
| CN104005784A (en) * | 2014-06-12 | 2014-08-27 | 中煤科工集团重庆研究院有限公司 | Cold and hot water pressure exchange system applied to deep heat damage mine |
| CN108915755A (en) * | 2018-08-28 | 2018-11-30 | 平顶山天安煤业股份有限公司 | A kind of double water storage room high-low pressure water converting systems and method for mine cooling |
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