Large-diameter shield soil bin cooling circulation system

Abstract

The utility model provides a large-diameter shield soil bin cooling circulation system. The cooling circulation system comprises a cooling circulation pipeline and a cooling liquid storage box arranged on an internal platform of a shield body of the shield tunneling machine. A circulation water pump, a cooling motor, a liquid level sensor and a temperature sensor are arranged in the cooling liquid storage box. The cooling circulation pipeline comprises a cooling liquid circulation pipe arranged in a shield tunneling machine soil bin, a cooling liquid output pipe and a cooling liquid backflow pipe, the cooling liquid output pipe and the cooling liquid backflow pipe are arranged in a shield tunneling machine shield body, the cooling liquid circulation pipe is arranged in the shield tunneling machine soil bin from top to bottom along a shield tunneling machine soil bin partition plate, and the cooling liquid output pipe is located above a shield tunneling machine main drive. The cooling liquid return pipe is positioned below a main drive of the shield tunneling machine; and ball valves and pressure sensors are arranged on the cooling liquid output pipe and the cooling liquid return pipe. The cooling circulation system is installed on shield equipment, the temperature of muck can be reduced, the situation that mud cakes are formed on a cutterhead is reduced, and the situation that main drive sealing fails due to high temperature can also be reduced.

Description

Technical Field

[0001] The utility model belongs to the field of shield construction, and particularly relates to a large-diameter shield soil bin cooling circulation system. Background Art

[0002] The shield tunneling method is a process of cutting rock mass by tools to form debris, transporting the muck outwards through a slurry circulation system or a screw conveyor system, and continuously advancing forward until the distance for segment assembly is met, and then starting to assemble segments to form a formed tunnel. During the construction of large-diameter slurry / earth pressure balance shields, the slurry often solidifies due to the too high temperature in the soil bin, resulting in the formation of mud cakes on the cutter head; when tunneling in some cohesive soil strata, the phenomenon of mud cake formation is more likely to occur, and in addition, the long-term operation of equipment in rock strata will also cause the temperature inside the shield machine soil bin and the main drive equipment to rise, resulting in a high-temperature phenomenon, further exacerbating problems such as muck caking and main drive seal damage, thereby reducing the service life of the equipment and seriously affecting the safety of shield construction. Moreover, after the phenomenon of shield cutter head caking occurs, generally, the equipment needs to be shut down, and then the method of soaking with chemical agents or manual entry into the bin for cleaning is selected through a relatively safe position for treatment, thus prolonging the construction period; in the case of damage to the main drive seal of the shield machine, the equipment also needs to be shut down and repaired and replaced in the tunnel, which will also seriously affect the construction period and increase the safety risk at the same time.

[0003] There is no active protection system for the above situation in the existing shield construction equipment. In view of the above construction phenomena, it is necessary to provide a protection technology for large-diameter shield construction to reduce the temperature of the muck in the soil bin, thereby avoiding the problem of mud cake formation on the cutter head and reducing the risk of equipment damage caused by the failure of the main drive seal due to high temperature. Summary of the Utility Model

[0004] The utility model provides a large-diameter shield soil bin cooling circulation system according to the deficiencies of the prior art. The cooling circulation system is installed in the shield equipment. By monitoring the internal temperature of the excavation chamber and the temperature requirements of equipment operation, the cooling circulation system is started to reduce the temperature of the muck, thereby reducing the situation of mud cake formation on the cutter head and also reducing the occurrence of the situation where the main drive seal fails due to high temperature.

[0005] In order to achieve the above technical objectives, the present utility model provides a large-diameter shield soil bin cooling circulation system. The cooling circulation system includes a cooling system and a cooling circulation pipeline. The cooling system is arranged on the internal platform of the shield body of the shield machine and includes a coolant storage tank, a circulation water pump and a cooling motor installed in the coolant storage tank. A liquid level sensor and a temperature sensor are provided in the coolant storage tank. The cooling circulation pipeline includes a coolant circulation pipe arranged in the soil bin of the shield machine, and a coolant output pipe and a coolant return pipe arranged in the shield body of the shield machine. The coolant circulation pipe is arranged in the soil bin of the shield machine from top to bottom along the soil bin partition of the shield machine. The coolant output pipe is located above the main drive of the shield machine, and its liquid inlet end extends into the coolant storage tank and is connected to the liquid outlet end of the circulation water pump. The discharging end of the coolant output pipe extends into the soil bin of the shield machine from the upper part of the soil bin partition of the shield machine and is connected to the upper port of the coolant circulation pipe. The coolant return pipe is located below the main drive of the shield machine, and its liquid outlet end extends into the coolant storage tank and is connected to the liquid return end of the circulation water pump. The liquid inlet end of the coolant return pipe extends into the soil bin of the shield machine from the lower part of the soil bin partition of the shield machine and is connected to the lower port of the coolant circulation pipe. Ball valves and pressure sensors are provided on the coolant output pipe and the coolant return pipe.

[0006] A preferred technical solution of the present utility model: There are two groups of the cooling circulation pipelines, and the two groups of cooling circulation pipelines are symmetrically arranged with the main drive of the shield machine as the center. The two groups of coolant circulation pipes are symmetrically arranged on the soil bin partition of the shield machine with the main drive of the shield machine as the center, and are supported by pipeline brackets on the side of the soil bin partition of the shield machine adjacent to the soil bin of the shield machine.

[0007] A preferred technical solution of the present utility model: The temperature sensor is arranged at the corner position of the coolant storage tank, and the liquid level sensor is arranged on the side of the coolant storage tank. A pressure sensor is provided on the coolant output pipe, and a second temperature sensor is provided on the coolant return pipe. The signal output ends of the liquid level sensor, the first temperature sensor, the pressure sensor and the second temperature sensor are all communicatively connected to the control system of the shield machine, and the control system of the shield machine is connected to the control ends of the circulation water pump and the cooling motor.

[0008] A preferred technical solution of the present utility model: The outside of the coolant storage tank is provided with a heat insulation layer.

[0009] A preferred technical solution of the present utility model: The connection part between the upper end of the coolant circulation pipe of one group of cooling circulation pipelines and the coolant output pipe is located at the position of 1-2 o'clock above the soil bin partition of the shield machine, and the connection part between the lower end and the coolant return pipe is located at the position of 4-5 o'clock below the soil bin partition of the shield machine; the connection part between the upper end of the coolant circulation pipe of the other group of cooling circulation pipelines and the coolant output pipe is located at the position of 10-11 o'clock above the soil bin partition of the shield machine, and the connection part between the lower end and the coolant return pipe is located at the position of 7-8 o'clock below the soil bin partition of the shield machine.

[0010] A preferred technical solution of the present utility model: Two sets of circulating water pumps are arranged in the coolant storage tank, and the two sets of circulating water pumps are respectively connected to two sets of cooling circulation pipelines to form a complete cooling circulation system.

[0011] A preferred technical solution of the present utility model: Two coolant circulation pipes form a convex shape. The upper end of each coolant circulation pipe is connected to the coolant output pipe through a ball valve, and the lower end is connected to the coolant return pipe through a ball valve. The ball valve is arranged on the side of the shield machine body adjacent to the bulkhead of the shield machine's soil chamber. A pressure sensor is provided on each coolant output pipe, and a second temperature sensor is provided on each coolant return pipe.

[0012] A preferred technical solution of the present utility model: The ball valve is an electromagnetic valve, and each electromagnetic valve is signal-connected to the shield machine control system and is automatically controlled through the shield machine control system.

[0013] In the present utility model, water is added to the cooling water tank to a liquid level of 80%. Circulating cooling is carried out through two sets of cooling systems. The control process of each set of cooling systems is as follows: Start the cooling motor to reduce the water temperature in the cooling water tank to 0 - 15°C. Start the circulating water pump to send the cooled water through the circulating water pump to the coolant delivery pipe, and then to the coolant circulation pipe, and then return to the cooling water tank through the coolant return pipe.

[0014] The cooling circulation system of the present utility model realizes the circulation of cooling water between pipelines through a circulating water pump. The coolant with a lower internal circulation temperature in the pipeline carries the temperature of the muck in the soil chamber outward, reducing the muck temperature and reducing the risk of caking. At the same time, the layout of the cooling circulation pipeline fully considers the position of the main drive of the shield machine and surrounds the main drive in a "convex" shape structure, effectively reducing the temperature of the main drive seal, avoiding the high-temperature failure of the main drive seal, ensuring the safety of the seal, and prolonging the service life of the equipment.

[0015] The beneficial effects of the present utility model:

[0016] (1) The cooling system of the present utility model includes devices such as a water tank, a cooling motor, a circulating water pump, a liquid level sensor, and a water tank temperature sensor, which are arranged on the platform inside the shield machine body. The specific position is arranged based on the principle of not affecting the installation of the components of the shield machine itself. The temperature sensor is arranged at the corner of the water tank and extends into the water tank. The liquid circulation temperature is monitored through the temperature sensor. The liquid level sensor is arranged on the side of the water tank and is connected to the water tank. The liquid height in the water tank is monitored through the liquid level sensor.

[0017] (2) The cooling pipe of the present utility model is connected to the water tank on the side close to the cooling system and to the ball valve arranged on the soil bin wall on the side close to the soil bin wall. The flow rate of the cooling water is controlled by the ball valve. At the same time, a pressure sensor is arranged on the pipeline to monitor the inlet pressure of the cooling water and judge the blockage and leakage conditions of the circulating pipeline. The return pipe is connected to the water tank on the side close to the cooling system and to the ball valve arranged on the soil bin wall on the side close to the soil bin wall. The flow rate of the cooling water is controlled by the ball valve. At the same time, a pipeline temperature sensor is arranged on the pipeline to monitor the return water temperature after the cooling water circulates and judge the change of the temperature of the muck in the soil bin.

[0018] (3) The cooling circulation pipe of the present utility model is arranged in a "convex" shape on the cross section of the soil bin partition. The upper part effectively avoids the personnel access structure and does not affect the opening operation passage. The middle position effectively avoids the main drive equipment of the shield machine and does not affect the rotation of the cutter head bracket. At the same time, the cooling water can be used to reduce the temperature around the main drive of the soil bin and protect the main drive from being damaged. The lower part effectively avoids structures such as the screw conveyor and agitator and does not affect the discharge of muck.

[0019] (4) The cooling circulation pipe of the present utility model is fixed on the cross section of the soil bin partition through pipeline fixed supports, and heat insulation cotton is laid outside the water tank to prevent the water level in the water tank from disappearing with the temperature in the tunnel space, increase the operation time of the cooling motor, and at the same time reduce the cooling effect.

[0020] The cooling circulation system of the present utility model is installed in the shield equipment. By monitoring the internal temperature of the excavation chamber and the temperature requirements of the equipment operation, the cooling circulation system is started to reduce the temperature of the muck, thereby reducing the situation of cutter head mud cake formation and also reducing the occurrence of the main drive seal failure due to high temperature. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the present utility model;

[0022] Figure 2 is the layout diagram of the pipes on the soil bin side of the present utility model;

[0023] Figure 3 and Figure 4 are the layout schematic diagrams of the pipes on the shield body side;

[0024] Figure 5 is the control schematic diagram of the present utility model.

[0025] In the figure: 1 - cooling system, 100 - coolant storage tank, 101 - circulating water pump, 102 - liquid level sensor, 103 - first temperature sensor, 104 - cooling motor, 2 - shield body of the shield machine, 3 - coolant output pipe, 4 - coolant circulation pipe, 5 - coolant return pipe, 6 - main drive of the shield machine, 7 - soil chamber partition of the shield machine, 8 - ball valve, 9 - pressure sensor, 10 - pipe support, 11 - second temperature sensor. Detailed implementation manner

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. The attached Figures 1 to 4 All are the drawings of the embodiments, which are drawn in a simplified manner and are only used to clearly and concisely illustrate the purpose of the embodiments of the present utility model. The technical solutions shown in the drawings below are the specific solutions of the embodiments of the present utility model and are not intended to limit the scope of the present utility model to be protected. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, 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 of the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, terms such as "set", "connect" should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] The embodiment provides a large-diameter shield soil chamber cooling circulation system, as Figures 1 to 4As shown in the figure, the cooling circulation system includes a cooling system 1 and a cooling circulation pipeline. The cooling system 1 is arranged on the internal platform of the shield body 2 of the shield machine, and includes a coolant storage tank 100, a circulation water pump 101 and a cooling motor 104 installed in the coolant storage tank 100. A liquid level sensor 102 and a first temperature sensor 103 are arranged in the coolant storage tank 100. The cooling system 1 is arranged on the premise that it does not affect the installation of the components of the shield machine itself. An insulating layer is provided outside the coolant storage tank 100 to prevent the water temperature in the tank from disappearing with the space temperature in the tunnel, increasing the operation time of the cooling motor and reducing the cooling effect at the same time. The first temperature sensor 103 is arranged at the corner position of the coolant storage tank 100, and the liquid level sensor 102 is arranged on the side of the coolant storage tank 100. The probes of the liquid level sensor 102 and the first temperature sensor 103 are located inside the water tank, and the signal output ends are located outside the coolant storage tank. The liquid circulation temperature is monitored by the first temperature sensor 103, and the liquid height in the coolant storage tank 100 is monitored by the liquid level sensor 102.

[0030] The embodiment provides a large-diameter shield soil bin cooling circulation system, as Figures 1 to 4 shown. There are two groups of cooling circulation pipelines. The two groups of cooling circulation pipelines are symmetrically arranged with the main drive 6 of the shield machine as the center. Each group of cooling circulation pipelines includes a coolant circulation pipe 4 arranged in the soil bin of the shield machine, and a coolant output pipe 3 and a coolant return pipe 5 arranged in the shield body 2 of the shield machine. The coolant circulation pipe 4 is arranged in the soil bin of the shield machine from top to bottom along the partition board 7 of the soil bin of the shield machine, and is installed on the side of the partition board 7 of the soil bin of the shield machine adjacent to the soil bin of the shield machine through a pipeline support 10. The coolant output pipe 3 is located above the main drive 6 of the shield machine. Its liquid inlet end extends into the coolant storage tank 100 and is connected to the liquid outlet end of the circulation water pump 101. The discharge end of the coolant output pipe 3 extends into the soil bin of the shield machine from the upper part of the partition board 7 of the soil bin of the shield machine and is connected to the upper port of the coolant circulation pipe 4. The coolant return pipe 5 is located below the main drive 6 of the shield machine. Its liquid outlet end is connected to the coolant storage tank 100. The liquid inlet end of the coolant return pipe 5 extends into the soil bin of the shield machine from the lower part of the partition board 7 of the soil bin of the shield machine and is connected to the lower port of the coolant circulation pipe 4. Two sets of circulation water pumps 101 are arranged in the coolant storage tank 100. The two sets of circulation water pumps 101 are respectively connected to the two groups of cooling circulation pipelines to form a complete cooling circulation system.

[0031] In the embodiment, as Figure 1 and Figure 2As shown in the figure, two coolant circulation pipes 4 form a convex shape. The upper end of each coolant circulation pipe 4 is connected to the coolant output pipe 3 through a ball valve 8, and the lower end is connected to the coolant return pipe 5 through a ball valve 8. The ball valve 8 is arranged on the side of the shield machine soil chamber partition 7 adjacent to the shield body of the shield machine. The connection part of the upper end of the coolant circulation pipe 4 of one group of cooling circulation pipes with the coolant output pipe 3 is located at the position of 1-2 o'clock above the shield machine soil chamber partition 7, and the connection part of the lower end with the coolant return pipe 5 is located at the position of 4-5 o'clock below the shield machine soil chamber partition 7. The connection part of the upper end of the coolant circulation pipe 4 of the other group of cooling circulation pipes with the coolant output pipe 3 is located at the position of 10-11 o'clock above the shield machine soil chamber partition 7, and the connection part of the lower end with the coolant return pipe 5 is located at the position of 7-8 o'clock below the shield machine soil chamber partition 7. The ball valve 8 adopts an electromagnetic control valve to control the flow rate of the cooling water through the ball valve. A pressure sensor 9 is provided on each coolant output pipe 3 to monitor the inlet pressure of the cooling water and judge the blockage and leakage conditions of the circulation pipeline. A second temperature sensor 11 is provided on each coolant return pipe 5 to monitor the return water temperature after the cooling water circulates and judge the change of the temperature of the muck in the soil chamber.

[0032] In the embodiment, as Figure 5 shown, the signal output ends of the liquid level sensor 102, the first temperature sensor 103, the pressure sensor 9 and the second temperature sensor 11 are all communicatively connected to the control system of the shield machine. The control system of the shield machine is connected to the control ends of the circulation water pump 101, the cooling motor 104 and the ball valve 8. The liquid level sensor 102 and the first temperature sensor 103 transmit signals to the control system of the shield machine, which can reflect the temperature and liquid level in the coolant storage tank 100. Then the data can be displayed through the display screen of the shield machine, and the temperature and liquid level in the coolant storage tank 100 can be monitored to avoid affecting the cooling effect due to insufficient coolant or high temperature. When the temperature is too high, the cooling motor 104 can also be controlled to work to reduce the water temperature in the coolant storage tank 100. The pressure sensor 9 transmits the pressure in the circulation pipeline to the control system of the shield machine, and the control system of the shield machine judges the blockage and leakage conditions of the circulation pipeline, so as to control the stop and start of the circulation system and avoid accidents. The second temperature sensor 11 judges the change of the temperature of the muck in the soil chamber by monitoring the return water temperature after the cooling water circulates. The setting of the ball valve 8 can also facilitate the closing during the pipeline inspection or prevent the mud from entering the pipeline after the cooling circulation pipe is worn and ruptured for a long time, resulting in damage to the cooling system.

[0033] When the utility model works, water is added to the coolant storage tank 100 to a liquid level of 80%. The cooling motor 104 is started to reduce the water temperature in the coolant storage tank 100 to 0-15°C. The circulating water pump 101 is started to pump the cooled coolant into the coolant conveying pipeline 3 through the coolant circulating water pump 101, and then into the coolant circulation pipe 5, and returns to the coolant storage tank 100 through the coolant return pipe 4. The coolant circulation pipe 5 is arranged on the soil bin partition 7 from top to bottom, so as to cool the soil bin, thereby reducing the temperature of the muck in the soil bin and reducing the caking phenomenon. At the same time, the layout of the cooling circulation pipeline fully considers the position of the main drive of the shield machine and surrounds the main drive in a "convex" shape structure, effectively reducing the temperature of the main drive seal, avoiding the high-temperature failure of the main drive seal, ensuring the safety of the seal, and prolonging the service life of the equipment.

[0034] As described above, this is only one embodiment of the utility model, and its description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the appended claims.

Claims

1. A large-diameter shield soil bin cooling circulation system, characterized in that: The cooling circulation system includes a cooling system (1) and a cooling circulation pipeline. The cooling system (1) is arranged on the internal platform of the shield body (2) of the shield machine, and includes a coolant storage tank (100), a circulation water pump (101) and a cooling motor (104) installed in the coolant storage tank (100). A liquid level sensor (102) and a first temperature sensor (103) are arranged in the coolant storage tank (100); the cooling circulation pipeline includes a coolant circulation pipe (4) arranged in the soil bin of the shield machine, and a coolant output pipe (3) and a coolant return pipe (5) arranged in the shield body (2) of the shield machine. The coolant circulation pipe (4) is arranged in the soil bin of the shield machine from top to bottom along the soil bin partition (7) of the shield machine. The coolant output pipe (3) is located above the main drive (6) of the shield machine, and its liquid inlet end extends into the coolant storage tank (100) and is communicated with the liquid outlet end of the circulation water pump (101). The discharge end of the coolant output pipe (3) extends into the soil bin of the shield machine from the upper part of the soil bin partition (7) of the shield machine and is connected to the upper port of the coolant circulation pipe (4). The coolant return pipe (5) is located below the main drive (6) of the shield machine, and its liquid outlet end is communicated with the coolant storage tank (100). The liquid inlet end of the coolant return pipe (5) extends into the soil bin of the shield machine from the lower part of the soil bin partition (7) of the shield machine and is connected to the lower port of the coolant circulation pipe (4); ball valves (8) are arranged on the coolant output pipe (3) and the coolant return pipe (5).

2. The large-diameter shield soil bin cooling circulation system according to claim 1, characterized in that: There are two sets of the cooling circulation pipelines, and the two sets of cooling circulation pipelines are symmetrically arranged with the main drive (6) of the shield machine as the center. The two sets of coolant circulation pipes (4) are symmetrically arranged on the soil bin partition (7) of the shield machine with the main drive (6) of the shield machine as the center, and are erected on the side of the soil bin partition (7) adjacent to the soil bin of the shield machine through a pipeline support (10).

3. A large-diameter shield soil bin cooling circulation system according to claim 1 or 2, characterized in that: The first temperature sensor (103) is arranged at the corner position of the coolant storage tank (100), and the liquid level sensor (102) is arranged on the side of the coolant storage tank (100); a pressure sensor (9) is arranged on the coolant output pipe (3), and a second temperature sensor (11) is arranged on the coolant return pipe (5). The signal output ends of the liquid level sensor (102), the first temperature sensor (103), the pressure sensor (9) and the second temperature sensor (11) are all communicatively connected to the control system of the shield machine, and the control system of the shield machine is connected to the control ends of the circulation water pump (101) and the cooling motor (104).

4. A large-diameter shield soil bin cooling circulation system according to claim 1 or 2, characterized in that: A heat preservation layer is arranged outside the coolant storage tank (100).

5. The large-diameter shield soil bin cooling circulation system according to claim 2, characterized in that: The connection part of the coolant circulation pipe (4) at the upper end of one set of cooling circulation pipes to the coolant output pipe (3) is located at the position of 1 - 2 o'clock above the soil chamber partition (7) of the shield machine, and the connection part of the lower end to the coolant return pipe (5) is located at the position of 4 - 5 o'clock below the soil chamber partition (7) of the shield machine; the connection part of the coolant circulation pipe (4) at the upper end of the other set of cooling circulation pipes to the coolant output pipe (3) is located at the position of 10 - 11 o'clock above the soil chamber partition (7) of the shield machine, and the connection part of the lower end to the coolant return pipe (5) is located at the position of 7 - 8 o'clock below the soil chamber partition (7) of the shield machine.

6. The large-diameter shield soil bin cooling circulation system according to claim 2, characterized in that: Two sets of circulation water pumps (101) are arranged in the coolant storage tank (100), and the two sets of circulation water pumps (101) are respectively connected to the two sets of cooling circulation pipes to form a complete cooling circulation system.

7. A large-diameter shield soil bin cooling circulation system according to claim 2, characterized in that: Two coolant circulation pipes (4) form a convex shape. The upper end of each coolant circulation pipe (4) is connected to the coolant output pipe (3) through a ball valve, and the lower end is connected to the coolant return pipe (5) through a ball valve (8), and the ball valve (8) is arranged on the side of the soil chamber partition (7) of the shield machine adjacent to the shield body of the shield machine; a pressure sensor (9) is arranged on each coolant output pipe (3), and a second temperature sensor (11) is arranged on each coolant return pipe (5).

8. A large-diameter shield soil bin cooling circulation system according to claim 2, characterized in that: The ball valve (8) is a solenoid valve, and each solenoid valve is signal - connected to the shield machine control system and is automatically controlled through the shield machine control system.

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