Secondary pipeline pressure maintaining system of mine cooling system

Abstract

The utility model discloses a secondary pipeline pressure maintaining system of a mine cooling system, and relates to the technical field of mine cooling. Comprising a water supplementing pipe network communicated with a primary high-pressure pipe network, and the end, away from the primary high-pressure pipe network, of the water supplementing pipe network is communicated with a secondary low-pressure pipe network and a pressure relief pipe network through a three-way valve; the water supplementing pipe network comprises a first pipeline, a high-pressure filter, a pressure reducing valve, a safety part, a first adjusting part, a pressure sensor and a flow sensor are sequentially installed on the first pipeline, and the high-pressure filter is arranged close to the primary high-pressure pipe network. The pressure relief pipe network comprises a sixth pipeline, a filter, a second adjusting part and a pressure relief part are sequentially installed on the sixth pipeline, and the filter is arranged close to the three-way valve. Water is taken from a primary high-pressure pipe network side, is decompressed by the pressure reducing valve, is directly supplemented into a low-pressure pipe network by utilizing own pressure difference, has the functions of water supplementing and pressure relief, and is simple in structure, small in occupied area and low in investment.

Description

Technical Field

[0001] The utility model relates to the technical field of mine cooling, in particular to a secondary pipeline pressure maintaining system for a mine cooling system. Background Technique

[0002] With the increasing depth and distance of coal mine exploitation, more and more mines suffer from high-temperature heat damage; moreover, the exploitation depth of metal mines generally exceeds one thousand meters, and the depth of individual mines has reached 2,000 meters, with the temperature of the surrounding rock underground up to 60 °C, so the mine refrigeration system is essential.

[0003] At present, mine refrigeration systems can be divided into local cooling and overall cooling according to different refrigeration areas. Among them, overall cooling is a large-scale refrigeration system, where multiple refrigerators are concentrated on the ground or underground, and the low-temperature cold water produced is then transported and distributed to the air coolers at each working face through pipelines, and water is used as the transport refrigerant. According to the different installation locations of the refrigerators, water is sent from the ground to the underground as cooling water or chilled water, and after heat exchange or pressure exchange, it enters the refrigerator as cooling water or becomes low-pressure chilled water and is sent to the heat exchanger at the working face.

[0004] According to the pressure grade of the water system, the overall cooling system has two loops: a high-pressure circulation loop from the ground to the underground and a low-pressure circulation loop underground. Each loop is relatively isolated and requires its own constant pressure make-up water system.

[0005] The high-pressure circulation from the ground to the underground adopts the method of making up water from the ground. Using a make-up water pump, water is taken from the water tank and replenished into the circulation pipe network; the make-up water for the low-pressure circulation loop underground adopts a make-up water method similar to that on the ground. A water treatment system (or water is released from the primary high-pressure pipe network to the water tank through a pressure reducing valve), a water tank, a make-up water pump, and a pressure sensor are set underground, and make-up water is carried out according to the pressure of the underground pipeline.

[0006] Adopting this method has limitations in coal mines: large floor space occupied by water tanks, water pumps, etc.; high power consumption for making up water through a water pump after pressure reduction; large investment, etc.

[0007] Patent publication number CN221076901U discloses a skid-mounted make-up water device using an expansion tank for make-up water and constant pressure, including an installation base, an expansion tank, a check valve chamber, and a nitrogen gas storage tank. One end of the top of the installation base is installed with an expansion tank, and the other end of the top of the installation base is installed with a nitrogen gas storage tank. A pressure sensor is installed at the top of the end of the expansion tank away from the nitrogen gas storage tank, and a first solenoid valve is installed at the bottom of the end of the expansion tank away from the nitrogen gas storage tank. This patent mainly uses the airbag filled with nitrogen gas in the expansion pipe to form a certain buffer space, which can compensate the pressure in time when the pipeline is short of water and play a certain role in pressure stabilization. This system is mainly used in scenarios with small pipeline network pressure and small compensation volume in ground air conditioning systems or heating systems.

[0008] Patent Publication No. CN220601746U discloses a new type of water replenishing and pressure stabilizing device, including a base, a water storage tank, a water replenishing tank, a solenoid valve, a water pump, etc. Through the cooperation among the water storage tank, the water replenishing tank, the solenoid valve, the water pump and the pressure gauge, the effect of adding water and pressurizing when the pressure of the water replenishing device changes is achieved, solving the problem that existing devices often cannot cope with pressure changes, thereby ensuring that the device will not be damaged.

[0009] Since existing pressure stabilizing and water replenishing devices all adopt a working principle similar to the above, equipped with water tanks, water pumps, pressure monitoring, etc., when the pressure of the monitored pipe network is lower than the set value, the water pump is turned on to replenish pressure into the pipe network; making the existing technology generally only have the function of water replenishment and not have the pressure relief function. Utility Model Content

[0010] The purpose of the present utility model is to provide a secondary pipeline pressure maintaining system for a mine cooling system to solve the problems existing in the above-mentioned prior art.

[0011] To achieve the above purpose, the present utility model provides the following solution: The present utility model provides a secondary pipeline pressure maintaining system for a mine cooling system, including a water replenishing pipe network connected to a primary high-pressure pipe network. One end of the water replenishing pipe network far from the primary high-pressure pipe network is respectively connected to a secondary low-pressure pipe network and a pressure relief pipe network through a three-way valve; the water replenishing pipe network includes a first pipeline, and a high-pressure filter, a pressure reducing valve, a safety part, a first adjusting part, a pressure sensor and a flow sensor are sequentially installed on the first pipeline, and the high-pressure filter is arranged close to the primary high-pressure pipe network; the pressure relief pipe network includes a sixth pipeline, and a filter, a second adjusting part and a pressure relief part are sequentially installed on the sixth pipeline, and the filter is arranged close to the three-way valve.

[0012] Preferably, a high-pressure manual gate valve is arranged on one side of the high-pressure filter facing the primary high-pressure pipe network, and the high-pressure manual gate valve is installed on the first pipeline.

[0013] Preferably, a second pipeline is arranged between the high-pressure manual gate valve and the high-pressure filter, the second pipeline is communicated with the first pipeline, a high-pressure ball valve is installed on the second pipeline, and one end of the second pipeline far from the first pipeline is communicated with a first drainage ditch.

[0014] Preferably, a high-pressure electric ball valve is arranged between the high-pressure filter and the pressure reducing valve, and the high-pressure electric ball valve is installed on the first pipeline.

[0015] Preferably, the safety part includes a third pipeline connected to the first pipeline. A safety valve is installed at one end of the third pipeline away from the first pipeline. One end of the safety valve away from the third pipeline is communicated with a fourth pipeline, and the fourth pipeline is communicated with a second drainage ditch.

[0016] Preferably, the first adjustment part includes a fifth pipeline. Both ends of the fifth pipeline are respectively connected to the first pipeline. An electric control valve is installed on the first pipeline between both ends of the fifth pipeline. First gate valves are respectively arranged on both sides of the electric control valve. A first electric ball valve is installed on the fifth pipeline. Ball valves are respectively arranged on both sides of the first electric ball valve, and the ball valves are installed on the fifth pipeline.

[0017] Preferably, the three-way valve is connected to the secondary low-pressure pipe network through a seventh pipeline, and a second gate valve is installed on the seventh pipeline.

[0018] Preferably, the second adjustment part includes an eighth pipeline. Both ends of the eighth pipeline are respectively connected to the sixth pipeline. A second electric ball valve is installed on the sixth pipeline between both ends of the eighth pipeline. A manual ball valve and a mechanical pressure relief valve are sequentially installed on the eighth pipeline, and the manual ball valve is arranged close to the filter.

[0019] Preferably, the pressure relief part includes a pressure relief tank. The water inlet end of the pressure relief tank is connected to the sixth pipeline, and the water outlet end of the pressure relief tank is communicated with a third drainage ditch through a ninth pipeline.

[0020] The present utility model discloses the following technical effects:

[0021] The present utility model can supplement the water after pressure reduction into the secondary low-pressure pipe network through the make-up water pipe network, detect the pressure of the make-up water point and the pressure of the secondary low-pressure pipe network through the pressure sensor, and monitor the instantaneous make-up water volume and the cumulative make-up water volume of the system through the flow sensor; at the same time, the pressure relief is carried out through the pressure relief pipe network, which can effectively ensure that the pressure of the secondary low-pressure pipe network is within the safe range value.

[0022] The present utility model takes water from the primary high-pressure pipe network side, reduces the pressure through a pressure reducing valve, and directly supplements it into the secondary low-pressure pipe network by using the self-provided pressure difference. At the same time, it has the functions of water supplement and pressure relief, with simple structure, small floor area and less investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 This is a schematic structural diagram of the system of the present utility model;

[0025] Among them, 1. High-pressure manual gate valve; 2. High-pressure ball valve; 3. High-pressure filter; 4. High-pressure electric ball valve; 5. Pressure reducing valve; 6. Safety valve; 7. Electric control valve; 8. First electric ball valve; 9. First gate valve; 10. Ball valve; 11. Pressure sensor; 12. Flow sensor; 13. Filter; 14. Second electric ball valve; 15. Manual ball valve; 16. Mechanical pressure relief valve; 17. Pressure relief tank; 18. Second gate valve; 19. First pipeline; 20. Second pipeline; 21. Third pipeline; 22. Fourth pipeline; 23. Fifth pipeline; 24. Sixth pipeline; 25. Seventh pipeline; 26. Eighth pipeline; 27. Ninth pipeline; 28. Three-way valve; 29. First drainage ditch; 30. Second drainage ditch; 31. Third drainage ditch. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Referring to Figure 1 , the present utility model discloses a secondary pipeline pressure maintaining system for a mine cooling system, which includes a make-up water pipeline network connected to a primary high-pressure pipeline network. One end of the make-up water pipeline network far from the primary high-pressure pipeline network is respectively connected to a secondary low-pressure pipeline network and a pressure relief pipeline network through a three-way valve 28; the make-up water pipeline network includes a first pipeline 19, and a high-pressure filter 3, a pressure reducing valve 5, a safety part, a first adjusting part, a pressure sensor 11, and a flow sensor 12 are sequentially installed on the first pipeline 19, and the high-pressure filter 3 is arranged close to the primary high-pressure pipeline network; the pressure relief pipeline network includes a sixth pipeline 24, and a filter 13, a second adjusting part, and a pressure relief part are sequentially installed on the sixth pipeline 24, and the filter 13 is arranged close to the three-way valve 28.

[0029] According to the pressure detected by the pressure sensor 11, make-up water or pressure relief is carried out through the control system.

[0030] The utility model can supplement the depressurized water into the secondary low-pressure pipe network through the make-up water pipe network, detect the pressure of the make-up water point and the pressure of the secondary low-pressure pipe network through the pressure sensor 11, and monitor the instantaneous make-up water volume and the cumulative make-up water volume of the system through the flow sensor 12; at the same time, the pressure relief pipe network is used for pressure relief, which can effectively ensure that the pressure of the secondary low-pressure pipe network is within the safe range value.

[0031] The utility model takes water from the primary high-pressure pipe network side, after being depressurized by the pressure reducing valve 5, directly supplements it into the secondary low-pressure pipe network by using the self-owned pressure difference, and has the functions of water supplement and pressure relief at the same time, with simple structure, small floor area and less investment.

[0032] In a further optimized scheme, a high-pressure manual gate valve 1 is arranged on one side of the high-pressure filter 3 facing the primary high-pressure pipe network, and the high-pressure manual gate valve 1 is installed on the first pipe 19.

[0033] The high-pressure manual gate valve 1 is used to cut off the water supply of the primary high-pressure pipe network during maintenance.

[0034] In a further optimized scheme, a second pipe 20 is arranged between the high-pressure manual gate valve 1 and the high-pressure filter 3, the second pipe 20 is communicated with the first pipe 19, a high-pressure ball valve 2 is installed on the second pipe 20, and one end of the second pipe 20 far away from the first pipe 19 is communicated with a first drainage ditch 29.

[0035] When cleaning the high-pressure filter 3, the pipe section where the high-pressure filter 3 is located can be drained and depressurized through the high-pressure ball valve 2.

[0036] In a further optimized scheme, a high-pressure electric ball valve 4 is arranged between the high-pressure filter 3 and the pressure reducing valve 5, and the high-pressure electric ball valve 4 is installed on the first pipe 19.

[0037] The high-pressure filter 3 is used to filter impurities in the make-up water and prevent impurities from entering the pressure reducing valve 5 with higher precision; the high-pressure electric ball valve 4 is electrically automatically controlled, and the start and stop of water supply are controlled by the control system; the pressure of the pressure reducing valve 5 is adjustable, the pressure reducing valve 5 mechanically reduces the high-pressure water taken from the primary high-pressure pipe network, the pressure after reduction is higher than the pressure in the secondary pipe, and the secondary low-pressure pipe network can be supplemented with water through the remaining pressure difference.

[0038] In a further optimized scheme, the safety part includes a third pipe 21 communicated with the first pipe 19, a safety valve 6 is installed at one end of the third pipe 21 far away from the first pipe 19, one end of the safety valve 6 far away from the third pipe 21 is communicated with a fourth pipe 22, and the fourth pipe 22 is communicated with a second drainage ditch 30.

[0039] When a fault occurs in the system and the secondary low-pressure pipe network is overpressured, the safety valve 6 automatically opens for pressure relief.

[0040] For a further optimized solution, the first adjustment part includes a fifth pipeline 23. The two ends of the fifth pipeline 23 are respectively communicated with the first pipeline 19. An electric control valve 7 is installed on the first pipeline 19 between the two ends of the fifth pipeline 23. First gate valves 9 are respectively arranged on both sides of the electric control valve 7. A first electric ball valve 8 is installed on the fifth pipeline 23. Ball valves 10 are respectively arranged on both sides of the first electric ball valve 8, and the ball valves 10 are installed on the fifth pipeline 23.

[0041] When the first water injection is carried out in the first pipeline 19, the electric control valve 7 can supply water with a large flow rate. The first gate valves 9 on both sides of it are used to cut off when the electric control valve 7 needs to be repaired.

[0042] When only a small amount of water replenishment is required during the normal operation of the system, the first electric ball valve 8 is used for water replenishment, and the flow rate is small. The ball valves 10 on both sides of it are used to cut off when the first electric ball valve 8 needs to be repaired.

[0043] For a further optimized solution, the three-way valve 28 is communicated with the secondary low-pressure pipe network through a seventh pipeline 25. A second gate valve 18 is installed on the seventh pipeline 25.

[0044] The decompressed water is replenished into the secondary low-pressure pipe network through the second gate valve 18.

[0045] For a further optimized solution, the second adjustment part includes an eighth pipeline 26. The two ends of the eighth pipeline 26 are respectively communicated with the sixth pipeline 24. A second electric ball valve 14 is installed on the sixth pipeline 24 between the two ends of the eighth pipeline 26. A manual ball valve 15 and a mechanical pressure relief valve 16 are successively installed on the eighth pipeline 26, and the manual ball valve 15 is arranged close to the filter 13.

[0046] The filter 13 is used to filter impurities in the water; according to the monitoring value of the pressure sensor 11, after the pressure is higher than the set value, the second electric ball valve 14 is opened for pressure relief.

[0047] The manual ball valve 15 is the repair valve for the mechanical pressure relief valve 16.

[0048] When the second electric ball valve 14 fails, the mechanical pressure relief valve 16 is used as a safety redundancy for pressure relief to ensure the safety of the pressure in the secondary low-pressure pipe network.

[0049] For a further optimized solution, the pressure relief part includes a pressure relief tank 17. The water inlet end of the pressure relief tank 17 is communicated with the sixth pipeline 24, and the water outlet end of the pressure relief tank 17 is communicated with a third drainage ditch 31 through a ninth pipeline 27.

[0050] The pressure relief tank 17 is a hollow tank. After pressure relief, it ensures that the pressurized water enters the pressure relief tank 17 and is discharged into the third drainage ditch 31 after overflow, avoiding the impact of the pressurized water on personnel or the ground and walls.

[0051] The first pipeline 19 and the seventh pipeline 25 adopt DN80 pipes; the third pipeline 21 adopts DN65 pipes; the fourth pipeline 22 adopts DN50 pipes; the second pipeline 20 adopts DN32 pipes; the fifth pipeline 23, the sixth pipeline 24, the eighth pipeline 26, and the ninth pipeline 27 adopt DN20 pipes.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0053] The embodiments described above are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A secondary pipeline pressure maintaining system for a mine cooling system, characterized in that: It includes a make-up water pipe network connected to the primary high-pressure pipe network. One end of the make-up water pipe network far from the primary high-pressure pipe network is respectively connected to a secondary low-pressure pipe network and a pressure relief pipe network through a three-way valve (28). The make-up water pipe network includes a first pipe (19). A high-pressure filter (3), a pressure reducing valve (5), a safety part, a first regulating part, a pressure sensor (11), and a flow sensor (12) are successively installed on the first pipe (19). The high-pressure filter (3) is arranged close to the primary high-pressure pipe network. The pressure relief pipe network includes a sixth pipe (24). A filter (13), a second regulating part, and a pressure relief part are successively installed on the sixth pipe (24). The filter (13) is arranged close to the three-way valve (28).

2. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: A high-pressure manual gate valve (1) is arranged on the side of the high-pressure filter (3) facing the primary high-pressure pipe network. The high-pressure manual gate valve (1) is installed on the first pipe (19).

3. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 2, characterized in that: A second pipe (20) is arranged between the high-pressure manual gate valve (1) and the high-pressure filter (3). The second pipe (20) is connected to the first pipe (19). A high-pressure ball valve (2) is installed on the second pipe (20). One end of the second pipe (20) far from the first pipe (19) is connected to a first drainage ditch (29).

4. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: A high-pressure electric ball valve (4) is arranged between the high-pressure filter (3) and the pressure reducing valve (5). The high-pressure electric ball valve (4) is installed on the first pipe (19).

5. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: The safety part includes a third pipe (21) connected to the first pipe (19). A safety valve (6) is installed at one end of the third pipe (21) far from the first pipe (19). One end of the safety valve (6) far from the third pipe (21) is connected to a fourth pipe (22). The fourth pipe (22) is connected to a second drainage ditch (30).

6. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: The first regulating part includes a fifth pipe (23). Both ends of the fifth pipe (23) are respectively connected to the first pipe (19). An electric regulating valve (7) is installed on the first pipe (19) between both ends of the fifth pipe (23). First gate valves (9) are respectively arranged on both sides of the electric regulating valve (7). A first electric ball valve (8) is installed on the fifth pipe (23). Ball valves (10) are respectively arranged on both sides of the first electric ball valve (8). The ball valves (10) are installed on the fifth pipe (23).

7. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: The three-way valve (28) is connected to the secondary low-pressure pipe network through a seventh pipe (25). A second gate valve (18) is installed on the seventh pipe (25).

8. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: The second regulating part includes an eighth pipe (26). Both ends of the eighth pipe (26) are respectively connected to the sixth pipe (24). A second electric ball valve (14) is installed on the sixth pipe (24) between both ends of the eighth pipe (26). A manual ball valve (15) and a mechanical pressure relief valve (16) are successively installed on the eighth pipe (26). The manual ball valve (15) is arranged close to the filter (13).

9. The secondary pipeline pressure maintaining system of the mine cooling system according to claim 1, characterized in that: The pressure relief part includes a pressure relief tank (17). The water inlet end of the pressure relief tank (17) is communicated with the sixth pipeline (24), and the water outlet end of the pressure relief tank (17) is communicated with a third drainage ditch (31) through a ninth pipeline (27).

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