CN214172681U - Cooling water circulation system of shield tunnel - Google Patents
Cooling water circulation system of shield tunnel Download PDFInfo
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- CN214172681U CN214172681U CN202120148001.6U CN202120148001U CN214172681U CN 214172681 U CN214172681 U CN 214172681U CN 202120148001 U CN202120148001 U CN 202120148001U CN 214172681 U CN214172681 U CN 214172681U
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Abstract
The utility model provides a shield tunnel cooling water circulation system, including one-level refrigeration return circuit, retaining branch road and second grade refrigeration branch road, retaining branch road and one-level refrigeration return circuit are linked together, and second grade refrigeration branch road is linked together with the forced air cooling system, one-level refrigeration return circuit is linked together with the second grade refrigeration branch road, and the second grade refrigeration branch road is linked together with the retaining branch road, and the retaining branch road is linked together with the water supply branch road through water supply assembly and return water subassembly respectively. The utility model discloses an improve the hole external cooling water circulation system difference in temperature, reduce the output, reached precipitation effect equally, effectively reduced sewage discharge and reduced the pollution to the environment.
Description
Technical Field
The utility model relates to a technical field of tunnel cooling especially relates to a shield tunnel cooling water circulation system.
Background
The existing cooling water circulation systems inside and outside the tunnel need a large amount of cooling water due to small temperature difference; because the unidirectional cooling water outside the tunnel is adopted for water inlet, a large amount of cooling water enters the sewage tank and is discharged together with sewage, and a large amount of water outside the tunnel needs three-stage precipitation and can pollute a surface water source outside the tunnel; for example, in patent application No. 201721519391.3 and a patent name "shield machine refrigeration cooling mechanism used in shield tunnel construction", a cooling water circulation structure is formed by using a water cooling unit and a cooling mechanism, and air is cooled in the cooling mechanism by using cooling water generated by the water cooling unit, so that the working environment in the tunnel is improved; the patent application number of 201811213623.1 and the patent name of 'cooling system and method for shield cooling circulation system under high temperature environment' disclose a method for improving the difference value of water temperature in a water collecting pool at a heat exchanger and water temperature of a shield machine cooling circulation system, more heat in an internal circulation cooling system can be taken away, and the shield cooling effect is improved, but the prior art discloses the technical problem how cooling sewage pollution discharge influences a surface water source outside a tunnel.
SUMMERY OF THE UTILITY MODEL
To the little difference in temperature of present hole external cooling water circulation system, need a large amount of cooling water, cause a large amount of cooling sewage to pollute the technical problem at the outer earth's surface water source in hole, the utility model provides a shield tunnel cooling water circulation system.
In order to solve the above problem, the technical scheme of the utility model is so realized:
the utility model provides a shield tunnel cooling water circulation system, includes one-level refrigeration return circuit, retaining branch road and second grade refrigeration branch road, and retaining branch road and one-level refrigeration return circuit are linked together, and second grade refrigeration branch road is linked together with air cooling system, one-level refrigeration return circuit is linked together with the second grade refrigeration branch road, and the second grade refrigeration branch road is linked together with the retaining branch road, and the retaining branch road is linked together with the water supply branch road through water supply assembly and return water assembly respectively.
Preferably, the water supply branch, the water storage branch, the primary refrigeration loop and the secondary refrigeration branch form a cooling water circulation loop.
Preferably, the primary refrigeration loop comprises an internal circulation water pump, a frequency converter heat exchange device, an internal circulation water tank and a main heat exchanger, the internal circulation water pump is respectively communicated with the internal circulation water tank and the frequency converter heat exchange device, the internal circulation water pump and the frequency converter heat exchange device are both communicated with the main heat exchanger, and the main heat exchanger is respectively communicated with the water storage branch and the secondary refrigeration branch.
Preferably, the water storage branch comprises a hot water tank and a cold water tank, the hot water tank is communicated with the cold water tank, the cold water tank is communicated with a main heat exchanger, the main heat exchanger is communicated with the secondary refrigeration mechanism, and the hot water tank is communicated with the secondary refrigeration branch; the cold water tank is communicated with the water supply branch through the water supply assembly, and the hot water tank is communicated with the water supply branch through the water return assembly.
Preferably, the secondary refrigeration branch comprises a refrigeration unit, and the refrigeration unit is communicated with a main heat exchanger in the primary refrigeration loop through an electronic water treatment instrument; the cold water tank in the water storage branch is communicated with the main heat exchanger through a cold water pump; the water supply branch comprises a cold water supply tank, a three-stage refrigeration cycle loop is installed on the cold water supply tank, and the cold water supply tank is communicated with the cold water tank and the hot water tank through a water supply assembly and a water return assembly respectively.
Preferably, the water supply assembly comprises a water supply air pressure tank, a water supply check valve and a variable frequency water supply pump, and the water supply air pressure tank, the water supply check valve and the variable frequency water supply pump are sequentially arranged on a pipeline between the cold water supply tank and the cold water tank; the pipelines at the two sides of the variable-frequency water supply pump are respectively provided with a water supply pump water outlet pressure sensor and a water supply pump water inlet pressure sensor, and the water outlet pressure sensor, the water inlet pressure sensor and the variable-frequency water supply pump are all connected with an upper computer; be provided with cold water tank pressure sensor in the cold water tank, be provided with electronic ball valve between cold water tank and the water supply atmospheric pressure jar, cold water tank pressure sensor and electronic ball valve all are connected with the host computer.
Preferably, the backwater component comprises a backwater pressure tank, a backwater check valve and a variable-frequency backwater pump, the backwater pressure tank, the backwater check valve and the variable-frequency backwater pump are sequentially arranged on a pipeline between the hot water tank and the cold water supply tank, the pipelines on two sides of the variable-frequency backwater pump are respectively provided with a backwater pump inlet pressure sensor and a backwater pump outlet pressure sensor, and the variable-frequency backwater pump, the backwater pump inlet pressure sensor and the backwater pump outlet pressure sensor are all connected with an upper computer.
Preferably, the three-stage refrigeration cycle loop comprises a cooling tower, a circulation water tank, a first circulation water pump, a first flowmeter, a water-cooling compressor unit, a second flowmeter and a second circulation water pump, the first circulation water pump is respectively communicated with a cold water supply tank and the water-cooling compressor unit, the first flowmeter is arranged between the first circulation water pump and the water-cooling compressor unit, the water-cooling compressor unit is communicated with the cooling tower and the circulation water tank, the cooling tower and the circulation water tank are communicated with the second circulation water pump, the second flowmeter is arranged between the cooling tower and the circulation water tank and the second circulation water pump, the second circulation water pump is communicated with the water-cooling compressor unit, and the water-cooling compressor unit is communicated with the cold water supply tank.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses utilize one-level refrigeration return circuit and second grade refrigeration branch road to improve the cooling water temperature, when second grade refrigeration branch road and air cooling system heat exchange, because the cooling water temperature difference in temperature is big, only need the low discharge cooling water can reach same refrigeration effect, thereby in accomplishing the hole, the outer efficient heat exchange of hole, traditional sewage discharge and sewage treatment pond have been saved simultaneously, the outer construction usable floor area in hole has been reduced, tertiary refrigeration in the hot water circulation discharge cooling water supply box after the heat exchange, be convenient for repeat cycle uses, the water resource has been saved greatly, avoided simultaneously sewage pollution hole foreign surface water and adopt frequency conversion constant voltage water pump, avoid the outer water supply pump of hole to lead to the loss electric energy for a long time invalid operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the working principle of the present invention.
In the figure, 1 is an internal circulation water pump, 2 is a frequency converter heat exchange device, 3 is an internal circulation water tank, 4 is a main heat exchanger, 5 is a return water pressure tank, 6 is a return water one-way valve, 7 is a return water pump water outlet pressure sensor, 8 is a frequency conversion return water pump, 9 is a return water pump water inlet pressure sensor, 10 is a hot water tank, 11 is a cold water tank, 12 is a cold water pump, 13 is a refrigerating unit, 14 is an electronic water treatment instrument, 15 is an air cooler, 16 is a secondary fan, 17 is a middle diameter pipeline, 18 is a large diameter pipeline, 19 is a primary fan, 20 is a water supply pressure tank, 21 is a water supply one-way valve, 22 is a frequency conversion water supply pump water outlet pressure sensor, 23 is a frequency conversion water supply pump, 24 is a frequency conversion water supply pump water inlet pressure sensor, 25 is a cooling tower and a circulation water tank, 26 is a second circulation water pump, 27 is a second flow meter, 28 is a water cooling compressor set, 29 is a first flow meter, 30 is a first circulation water pump, 31 is a protective shed, 32 is a protective shed heat dissipation port, 33 is an electric ball valve, and 34 is a cold water tank pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in figure 1, a cooling water circulation system of a shield tunnel comprises a primary refrigeration loop, a water storage branch and a secondary refrigeration branch, wherein the water storage branch is communicated with the primary refrigeration loop, the secondary refrigeration branch is communicated with an air cooling system, the primary refrigeration loop is communicated with the secondary refrigeration branch, the secondary refrigeration branch is communicated with the water storage branch, the water storage branch is respectively communicated with a water supply branch through a water supply component and a water return component, and the water supply branch, the water storage branch, the primary refrigeration loop and the secondary refrigeration branch form a cooling water circulation loop. Because the temperature difference of the cooling water is large, the same refrigeration effect can be achieved only by small flow of cooling water, so that efficient heat exchange inside and outside the tunnel is completed, the traditional sewage discharge and sewage treatment tank is saved, and the construction use area outside the tunnel is reduced.
The primary refrigeration loop comprises an internal circulation water pump 1, a frequency converter heat exchange device 2, an internal circulation water tank 3 and a main heat exchanger 4, wherein the internal circulation water pump 1 is respectively communicated with the internal circulation water tank 3 and the frequency converter heat exchange device 2, the internal circulation water pump 1 and the frequency converter heat exchange device 2 are respectively communicated with the main heat exchanger 4, and the main heat exchanger 4 is respectively communicated with a water storage branch and a secondary refrigeration branch.
The water storage branch comprises a hot water tank 10 and a cold water tank 11, the hot water tank 10 is communicated with the cold water tank 11, the cold water tank 11 is communicated with a main heat exchanger 4, the main heat exchanger 4 is communicated with a secondary refrigeration mechanism, and the hot water tank 10 is communicated with a secondary refrigeration branch; the cold water tank 11 is communicated with the water supply branch through a water supply assembly, and the hot water tank 10 is communicated with the water supply branch through a water return assembly.
The secondary refrigeration branch comprises a refrigeration unit 13, the refrigeration unit 13 is communicated with the main heat exchanger 4 in the primary refrigeration loop through an electronic water treatment instrument 14, and the electronic water treatment instrument 14 is adopted, so that scale formation of the heat exchanger in the refrigeration unit 13 can be effectively reduced, and efficient heat exchange is ensured; the cold water tank 11 in the water storage branch is communicated with the main heat exchanger 4 through a cold water pump 12; the water supply branch comprises a cold water supply tank, a three-stage refrigeration cycle loop is installed on the cold water supply tank, and the cold water supply tank is communicated with the cold water tank 11 and the hot water tank 10 through a water supply assembly and a water return assembly respectively.
The water supply assembly comprises a water supply air pressure tank 20, a water supply check valve 21 and a variable frequency water supply pump 23, wherein the water supply air pressure tank 20, the water supply check valve 21 and the variable frequency water supply pump 23 are sequentially arranged on a pipeline between the cold water supply tank and the cold water tank 11; the pipelines at the two sides of the variable-frequency water supply pump 23 are respectively provided with a water supply pump water outlet pressure sensor 22 and a water supply pump water inlet pressure sensor 24, and the water supply pump water outlet pressure sensor 22, the water supply pump water inlet pressure sensor 24 and the variable-frequency water supply pump 23 are all connected with an upper computer; a cold water tank pressure sensor 34 is arranged in the cold water tank 11, an electric ball valve 33 is arranged between the cold water tank 11 and the water supply air pressure tank 20, and the cold water tank pressure sensor 34 and the electric ball valve 33 are both connected with an upper computer; when the cold water tank pressure sensor 34 of the cold water tank 11 reflects that the liquid level is too low, the electric ball valve 33 is opened, the pressure of the air pressure tank 20 is reduced, the tunnel water inlet variable frequency water pump 23 is started, the pressure set by the upper computer is maintained until the electric ball valve 33 is closed, the pressure of the pump outlet pressure sensor 22 is maintained stable, the tunnel water inlet variable frequency water pump 23 is closed, the actual meaning is that the control of the frequency converter is related to the pressure, and when the pressure is reduced, the frequency converter is started; the pneumatic tank has the advantages that when a small amount of water leaks from the pipeline, stable pressure of the pipeline can be maintained, and frequent starting of the frequency converter is avoided.
The return water subassembly includes return water atmospheric pressure jar 5, return water check valve 6 and frequency conversion return water pump 8, return water atmospheric pressure jar 5, return water check valve 6 and frequency conversion return water pump 8 set gradually on the pipeline between hot-water tank 10 and cold water supply tank, be provided with return water pump pressure sensor 9 and return water pump play water pressure sensor 7 of intaking respectively on the pipeline of 8 both sides of frequency conversion return water pump, install pressure sensor respectively in frequency conversion return water pump both sides, frequency conversion return water pump 8, return water pump intake pressure sensor 9 and return water pump play water pressure sensor 7 all are connected with the host computer, adopt pump intake pressure sensor 9 to reflect water tank liquid level control: when the liquid level reflected by the pump water inlet pressure sensor 9 is higher than the low liquid level of the hot water tank 10, the variable-frequency water return pump 8 is started; when the liquid level reflected by the pump water inlet pressure sensor 9 is less than the low liquid level of the warm water tank 10, the variable-frequency water return pump 8 is closed.
The three-stage refrigeration circulation loop comprises a cooling tower and circulation water tank 25, a first circulation water pump 30, a first flowmeter 29, a water-cooling compressor set 28, a second flowmeter 27 and a second circulation water pump 26, wherein a cold water supply tank is installed in a protective shed 31, the first circulation water pump 30 is respectively communicated with the cold water supply tank and the water-cooling compressor set 28, the first flowmeter 29 is arranged between the first circulation water pump 30 and the water-cooling compressor set 28, the water-cooling compressor set 28 is communicated with the cooling tower and the circulation water tank 25, the cooling tower and the circulation water tank 25 are communicated with the second circulation water pump 26, the second flowmeter 27 is arranged between the cooling tower and the circulation water tank 25 and the second circulation water pump 26, the second circulation water pump 26 is communicated with the water-cooling compressor set 28, and the water-cooling compressor set 28 is communicated with the cold water supply tank; the first circulating water pump 30 brings the heat of the return water in the cold water tank outside the tunnel to the water-cooling screw compressor unit 28, and once the first flowmeter 29 finds that no flow exists, the first circulating water pump 30 and the water-cooling screw compressor unit 28 are stopped; the second circulating water pump 26 diffuses the heat generated by the circulation of the first circulating water pump 30 from the shelter heat-radiating port 32 to the atmosphere through the cooling tower and the circulating water tank 25.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a shield tunnel cooling water circulation system, includes one-level refrigeration return circuit, retaining branch road and second grade refrigeration branch road, and retaining branch road and one-level refrigeration return circuit are linked together, and second grade refrigeration branch road is linked together with air cooling system, its characterized in that, one-level refrigeration return circuit is linked together with the second grade refrigeration branch road, and the second grade refrigeration branch road is linked together with the retaining branch road, and the retaining branch road is linked together with the water supply branch road through water supply assembly and return water subassembly respectively.
2. The shield tunnel cooling water circulation system according to claim 1, wherein the water supply branch, the water storage branch, the primary refrigeration circuit and the secondary refrigeration branch constitute a cooling water circulation circuit.
3. The shield tunnel cooling water circulation system according to claim 1 or 2, wherein the primary refrigeration loop comprises an internal circulation water pump (1), a frequency converter heat exchange device (2), an internal circulation water tank (3) and a main heat exchanger (4), the internal circulation water pump (1) is respectively communicated with the internal circulation water tank (3) and the frequency converter heat exchange device (2), the internal circulation water pump (1) and the frequency converter heat exchange device (2) are both communicated with the main heat exchanger (4), and the main heat exchanger (4) is respectively communicated with the water storage branch and the secondary refrigeration branch.
4. The shield tunnel cooling water circulation system according to claim 3, wherein the water storage branch comprises a hot water tank (10) and a cold water tank (11), the hot water tank (10) is communicated with the cold water tank (11), the cold water tank (11) is communicated with the main heat exchanger (4), the main heat exchanger (4) is communicated with the secondary refrigeration mechanism, and the hot water tank (10) is communicated with the secondary refrigeration branch; the cold water tank (11) is communicated with the water supply branch through a water supply assembly, and the hot water tank (10) is communicated with the water supply branch through a water return assembly.
5. The shield tunnel cooling water circulation system according to claim 1, 2 or 4, wherein the secondary refrigeration branch comprises a refrigeration unit (13), and the refrigeration unit (13) is communicated with the main heat exchanger (4) in the primary refrigeration loop through an electronic water treatment device (14); the cold water tank (11) in the water storage branch is communicated with the main heat exchanger (4) through a cold water pump (12); the water supply branch comprises a cold water supply tank, a three-stage refrigeration cycle loop is installed on the cold water supply tank, and the cold water supply tank is communicated with the cold water tank (11) and the hot water tank (10) through a water supply assembly and a water return assembly respectively.
6. The shield tunnel cooling water circulation system according to claim 5, wherein the water supply assembly comprises a water supply air pressure tank (20), a water supply check valve (21) and a variable frequency water supply pump (23), the water supply air pressure tank (20), the water supply check valve (21) and the variable frequency water supply pump (23) are sequentially arranged on a pipeline between the cold water supply tank and the cold water tank (11); a water supply pump water outlet pressure sensor (22) and a water supply pump water inlet pressure sensor (24) are respectively arranged on pipelines at two sides of the variable-frequency water supply pump (23), and the water supply pump water outlet pressure sensor (22), the water supply pump water inlet pressure sensor (24) and the variable-frequency water supply pump (23) are all connected with an upper computer; be provided with cold water tank pressure sensor (34) in cold water tank (11), be provided with electric ball valve (33) between cold water tank (11) and water supply atmospheric pressure jar (20), cold water tank pressure sensor (34) and electric ball valve (33) all are connected with the host computer.
7. The shield tunnel cooling water circulation system according to claim 5, wherein the water return component comprises a water return pressure tank (5), a water return check valve (6) and a variable frequency water return pump (8), the water return pressure tank (5), the water return check valve (6) and the variable frequency water return pump (8) are sequentially arranged on a pipeline between the hot water tank (10) and the cold water supply tank, the pipelines on two sides of the variable frequency water return pump (8) are respectively provided with a water return pump water inlet pressure sensor (9) and a water return pump water outlet pressure sensor (7), and the variable frequency water return pump (8), the water return pump water inlet pressure sensor (9) and the water return pump water outlet pressure sensor (7) are all connected with an upper computer.
8. The shield tunnel cooling water circulation system according to claim 5, wherein the three-stage refrigeration circulation circuit comprises a cooling tower and circulation water tank (25), a first circulation water pump (30), a first flow meter (29), a water-cooled compressor unit (28), a second flow meter (27) and a second circulation water pump (26), the first circulation water pump (30) is respectively communicated with a cold water supply tank and the water-cooled compressor unit (28), the first flow meter (29) is arranged between the first circulation water pump (30) and the water-cooled compressor unit (28), the water-cooled compressor unit (28) is communicated with the cooling tower and the circulation water tank (25), the cooling tower and the circulation water tank (25) is communicated with the second circulation water pump (26), the second flow meter (27) is arranged between the cooling tower and the circulation water tank (25) and the second circulation water pump (26), and the second circulation water pump (26) is communicated with the water-cooled compressor unit (28), a water chilling compressor unit (28) communicates with the chilled water supply tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120148001.6U CN214172681U (en) | 2021-01-20 | 2021-01-20 | Cooling water circulation system of shield tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120148001.6U CN214172681U (en) | 2021-01-20 | 2021-01-20 | Cooling water circulation system of shield tunnel |
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| CN214172681U true CN214172681U (en) | 2021-09-10 |
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| CN202120148001.6U Active CN214172681U (en) | 2021-01-20 | 2021-01-20 | Cooling water circulation system of shield tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877595A (en) * | 2022-05-17 | 2022-08-09 | 中铁工程装备集团有限公司 | Tunnel construction temperature control system |
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2021
- 2021-01-20 CN CN202120148001.6U patent/CN214172681U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877595A (en) * | 2022-05-17 | 2022-08-09 | 中铁工程装备集团有限公司 | Tunnel construction temperature control system |
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