A circulating water cooling device in a tunnel boring machine

Abstract

The present invention proposes an internal circulation water cooling device for a tunnel boring machine, including a refrigeration circulation system, the refrigeration circulation system including a compressor, the compressor is connected to a condenser, the condenser is connected to a throttle valve, the throttle valve is connected to an evaporator, the evaporator is in contact with the internal circulation cooling system for heat exchange, and the condenser is in contact with the tunnel air circulation system for heat exchange. The advantages of the present invention are: reducing the amount of external water consumed by the tunnel boring machine, avoiding the generation of a large amount of water at the bottom and excavation surface of a particularly long / downhill tunnel, avoiding high-power drainage pumps and a large number of relay drainage pump stations, reducing the project cost, and ensuring efficient excavation of the tunnel boring machine.

Description

Technical Field

[0001] The invention relates to a tunnel cooling device, in particular to an internal circulating water cooling device for a tunnel boring machine. Background Art

[0002] Tunnel boring machine construction methods are widely used in water diversion tunnels, urban subways and mountain tunnel projects in my country. Extra-long / downhill tunnels are common among them, so a smaller water intake is required to avoid a large amount of water at the bottom of the tunnel and the excavation surface, to avoid high-power drainage pumps and a large number of relay drainage pump stations, to reduce project costs and ensure efficient tunneling of the tunnel boring machine.

[0003] At present, in order to reduce the temperature of the circulating return water in the tunnel boring machine (to cool the main components of the tunnel boring machine), a large amount of external water is used to cool the circulating return water in the tunnel boring machine. A large amount of hot water will accumulate in the hot water tank. Since the hot water needs to be discharged out of the tunnel during the construction of extra-long / downhill tunnels, this requires the configuration of high-power drainage pumps and a large number of relay drainage pump stations, which increases equipment investment and construction costs. A more economical method is needed to bring the heat out of the tunnel. Summary of the invention

[0004] The invention provides a circulating water cooling device in a tunnel boring machine, which solves the problem of multiple equipments and high cost of existing circulating cooling systems for construction of extra-long / downhill tunnels.

[0005] The technical solution of the present invention is implemented as follows: an internal circulation water cooling device for a tunnel boring machine includes a refrigeration circulation system, the refrigeration circulation system includes a compressor, the compressor is connected to a condenser, the condenser is connected to a throttle valve, the throttle valve is connected to an evaporator, the evaporator is in contact with the internal circulation cooling system for heat exchange, and the condenser is in contact with the tunnel air circulation system for heat exchange.

[0006] The internal circulation cooling system comprises a circulating water pipe, which passes through an evaporator, a circulating water tank, a circulating water pump and a device to be cooled.

[0007] The device to be cooled includes a parallel-connected drive device, a gear oil cooler, a hydraulic oil cooler, a frequency converter cooler and / or an air compressor cooler.

[0008] The driving device comprises a main driving motor and a main driving reducer connected in series.

[0009] The circulating water pipe is in contact with the main heat exchanger for heat exchange, and the main heat exchanger is in contact with the cutter head flushing system for heat exchange.

[0010] The cutter head flushing system comprises a water inlet pipe outside the tunnel, which is connected to the cutter head flushing nozzle through a main heat exchanger, a warm water tank and a flushing water pump.

[0011] The water inlet pipe outside the tunnel passes through the electric valve, the cold water tank, the cold water pump, and then passes through the main heat exchanger.

[0012] The tunnel air circulation system comprises a tunnel return air duct, which is connected to the outside of the tunnel through a tunnel fan and a condenser.

[0013] The tunnel air circulation system comprises a dust removal tunnel return air duct, which is connected to the outside of the tunnel through a dust collector, a dust removal fan and a condenser.

[0014] The tunnel air circulation system comprises an air inlet pipe outside the tunnel, and the air inlet pipe outside the tunnel extends into the tunnel through a relay fan.

[0015] An air duct storage device is arranged on the air inlet duct outside the tunnel.

[0016] The advantages of the present invention are: reducing the amount of external water consumed by the tunnel boring machine, avoiding the generation of a large amount of water at the bottom and excavation surface of the extra-long / downhill tunnel, avoiding high-power drainage pumps and a large number of relay drainage pump stations, reducing the project cost, and ensuring efficient excavation of the tunnel boring machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the internal circulation cooling system of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the tunnel air circulation system of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the dust removal tunnel air circulation system of the present invention.

[0021] In the figure: 1-evaporator, 2-compressor, 3-condenser, 4-throttle valve, 5-circulating water pipe, 6-tunnel dust removal return air pipe, 7-tunnel return air pipe, 8-main drive motor, 9-main drive reducer, 10-gear oil cooler, 11-hydraulic oil cooler, 12-inverter cooler, 13-air compressor cooler, 14-circulating water pump, 15-circulating water tank, 16-main heat exchanger, 17-cold water tank, 18-electric valve, 19-cold water pump, 20-warm water tank, 21-flushing water pump, 22-tunnel external water inlet pipe, 23-tunnel external air inlet pipe, 24-air duct storage, 25-relay fan, 26-dust collector, 27-dust removal fan, 28-tunnel fan. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, an internal circulation water cooling device for a tunnel boring machine includes a refrigeration circulation system, the refrigeration circulation system includes a compressor 2, the compressor 2 is connected to a condenser 3, the condenser 3 is connected to a throttle valve 4, the throttle valve 4 is connected to an evaporator 1, forming a heat pump cycle, the evaporator 1 contacts with the internal circulation cooling system to absorb heat, and the condenser 3 contacts with the tunnel air circulation system to release heat, and the heat absorbed by the internal circulation cooling system is discharged to the outside of the tunnel through the tunnel air circulation system, thereby reducing the demand of the internal circulation cooling system for cooling water outside the tunnel, naturally avoiding high-power drainage pumps and a large number of relay drainage pump stations, and saving equipment and costs.

[0024] The internal circulation cooling system includes a circulating water pipe 5, which passes through an evaporator 1, a circulating water tank 15, a circulating water pump 14 and a device to be cooled to form a circulation loop. The device to be cooled includes a parallel driving device, a gear oil cooler 10, a hydraulic oil cooler 11, a frequency converter cooler 12 and / or an air compressor cooler 13, and the driving device includes a main driving motor 8 and a main driving reducer 9 connected in series. The circulating water absorbs the heat in the device to be cooled and then heats up. The refrigerant in the evaporator 1 absorbs the heat in the circulating water. After being cooled, the circulating water exchanges heat with the device to be cooled again to perform circulation cooling.

[0025] The circulating water pipe 5 contacts the main heat exchanger 16 to release heat, and the main heat exchanger 16 contacts the cutter disc flushing system to release heat. The cutter disc flushing system includes an external tunnel water inlet pipe 22, which is connected to the cutter disc flushing nozzle through an electric valve 18, a cold water tank 17, a cold water pump 19, a main heat exchanger 16, a warm water tank 20, and a flushing water pump 21. The cutter disc flushing water is used to absorb the heat in the circulating water, further cool the circulating water, and improve the cooling effect of the circulating water.

[0026] The tunnel air circulation system includes an air inlet duct 23 outside the tunnel and a tunnel return air duct 7. The air inlet duct 23 outside the tunnel extends into the tunnel through a relay fan 25 to provide fresh air for the tunnel. An air duct storage 24 is provided on the air inlet duct 23 outside the tunnel to provide storage space for the air duct, which is convenient for realizing the expansion and extension of the air duct. The tunnel return air duct 7 is connected to the outside of the tunnel through a tunnel fan 28 and a condenser 3. The return air in the tunnel absorbs the heat released by the condenser and is then discharged to the outside of the tunnel to avoid temperature rise in the tunnel and affect the construction environment, and finally realize the transfer of heat to the outside.

[0027] When the excavation dust in the tunnel is large, a dust removal type tunnel air circulation system is used, which includes a dust removal tunnel return air duct 6, which is connected to the outside of the tunnel through a dust collector 26, a dust removal fan 27, and a condenser 3. Dust is removed from the return air in the tunnel to avoid damaging the external environment.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A circulating water cooling device for a roadheader, comprising a refrigeration cycle system, the refrigeration cycle system comprising a compressor (2), the compressor (2) being connected to a condenser (3), the condenser (3) being connected to a throttle valve (4), the throttle valve (4) being connected to an evaporator (1), characterized in that: The evaporator (1) is in contact with the internal circulation cooling system for heat exchange, and the condenser (3) is in contact with the tunnel air circulation system for heat exchange; The internal circulation cooling system comprises a circulating water pipe (5), wherein the circulating water pipe (5) passes through an evaporator (1), a circulating water tank (15), a circulating water pump (14) and a device to be cooled; The circulating water pipe (5) is in contact with the main heat exchanger (16) for heat exchange, and the main heat exchanger (16) is in contact with the blade disc flushing system for heat exchange; the blade disc flushing water is used to absorb the heat in the circulating water, thereby further cooling the circulating water; The tunnel air circulation system comprises a tunnel return air duct (7) and / or a dust removal tunnel return air duct (6); the tunnel return air duct (7) is connected to the outside of the tunnel via a tunnel fan (28) and a condenser (3); the dust removal tunnel return air duct (6) is connected to the outside of the tunnel via a dust collector (26), a dust removal fan (27) and a condenser (3); The heat absorbed by the internal circulation cooling system is discharged to the outside of the tunnel through the tunnel air circulation system, thereby reducing the internal circulation cooling system's demand for cooling water outside the tunnel.

2. The internal circulating water cooling device of the tunnel boring machine according to claim 1, characterized in that: The device to be cooled comprises a parallel-connected drive device, a gear oil cooler (10), a hydraulic oil cooler (11), a frequency converter cooler (12) and / or an air compressor cooler (13).

3. The internal circulating water cooling device of the tunnel boring machine according to claim 2, characterized in that: The driving device comprises a main driving motor (8) and a main driving reducer (9) connected in series.

4. The internal circulating water cooling device of the tunnel boring machine according to claim 1, characterized in that: The cutter head flushing system comprises an external tunnel water inlet pipe (22), which is connected to the cutter head flushing nozzle through a main heat exchanger (16), a warm water tank (20), and a flushing water pump (21).

5. The internal circulating water cooling device of the tunnel boring machine according to claim 4, characterized in that: The tunnel external water inlet pipe (22) passes through the electric valve (18), the cold water tank (17), the cold water pump (19), and then passes through the main heat exchanger (16).

6. The internal circulating water cooling device of the tunnel boring machine according to claim 1, characterized in that: The tunnel air circulation system further comprises an air inlet pipe (23) outside the tunnel, and the air inlet pipe (23) outside the tunnel extends into the tunnel through a relay fan (25).

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