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External water circulation system having automatic control function and used for TBM and external water circulation method

A circulation system and external circulation technology, applied in household refrigeration equipment, cooling fluid circulation equipment, applications, etc., can solve the problems of difficult water return, large pressure drop of external water, difficult control of internal water temperature, etc., and achieve easy control and operation , Solve the effect that is difficult to control and cleverly designed

Pending Publication Date: 2019-10-18
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an external water circulation system with automatic control and an external water circulation method for TBM, which solves the problems in the prior art that the internal water temperature is difficult to control, the external water pressure drop is large, and the water return is difficult. question

Method used

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  • External water circulation system having automatic control function and used for TBM and external water circulation method

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Embodiment 2

[0028] Embodiment 2, an external water circulation system with automatic control for TBM, the external circulation water outlet system includes a main water outlet pipeline 36, and a fourth pressure sensor 10, a third pneumatic The ball valve 12, the first one-way valve 13 and the first manual gate valve 14, the fourth pressure sensor 10 and the third pressure sensor 8 are located on both sides of the cooler respectively, and are used to monitor the pressure of the water inlet and outlet outside the cooler 31. When the two When the differential pressure exceeds the set value, the system will give an alarm, indicating that the cooler 31 is blocked. A warm water tank 16 is arranged in parallel between the third pneumatic ball valve 12 and the first manual gate valve 14, and a fourth pneumatic ball valve 15 is arranged on the water inlet pipeline of the warm water tank 16. water or not. The warm water tank 16 is provided with a first water outlet system and a second water outlet...

Embodiment 3

[0031] Example 3, such as figure 1 Shown, a kind of TBM uses the external water circulation method with the external water circulation system of automatic control, comprises the steps:

[0032] S1: When the tunnel distance is short, the flow rate of flow meter 1 is relatively large, and the return water distance does not exceed the maximum lift of the external water pump: the external water enters the cooler 31 through the main water inlet pipeline 34 to exchange heat with the internal circulating water, and the third pump is opened. The pneumatic ball valve 12 and the first manual gate valve 14 close the return water pump 18 and the third manual ball valve 29, and the external water returns directly under the action of the external water pump;

[0033] S2: When the tunnel distance is long, the flow rate of flow meter 1 is small, and the return water distance has exceeded the maximum lift of the external water pump, the external water enters the cooler 31 through the main wate...

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Abstract

The invention discloses an external water circulation system having an automatic control function and used for a TBM and an external water circulation method. The external water circulation system andthe external water circulation method solve the problems that in the prior art, internal water temperature is difficult to control, the external water pressure drop is large, and water return is difficult. The external water circulation system comprises a cooler, and an external circulating water inlet system and an external circulating water outlet system are connected to the cooler, and the cooler is connected with an internal circulating water inlet pipe and an internal circulating water outlet pipe. The external water circulation system and the external water circulation method can be used for external water circulation under different working conditions such as short-distance tunnels and long-distance tunnels. When the tunnel distance is short, water return is directly carried out through a water outlet main pipe; when the tunnel distance is long, a warm water tank is used for buffering outlet water, and the problems that under the long-distance tunnel working condition, the external water pressure drop is large and water return is difficult are solved. A first manual gate valve is used for adjusting the flow rate of the external water passing through the cooler, the internalwater temperature is further controlled, the system and method are convenient and easy to control, and the problem that the internal water temperature is difficult to control is effectively solved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an external water circulation system with automatic control for a TBM and an external water circulation method. Background technique [0002] With the needs of social development and the development of roadheaders, the excavation diameter of roadheaders gradually develops in two directions: large diameter and small diameter. For hard rock TBMs, TBMs are generally long-distance excavations, and the excavation length is several kilometers or even dozens of kilometers. , and a large amount of water is needed during the excavation process, mainly for cooling. The existing TBM cooling method is generally to cool the internal water system through the external water system, the external water is directly provided from outside the cave, the internal water system is a closed system, and the external water system is an open system. For long-distance TBMs, the external water sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/11F25D1/02F25D17/02
CPCE21D9/11F25D1/02F25D17/02
Inventor 刘永亮郭付军俞培德朱团辉罗恒星胡燕伟姚晶李东辉赵康峰
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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