Low-temperature saline water refrigerating device arranged in tunnel and capable of shortening construction period

Abstract

The utility model relates to a low-temperature saline water refrigerating device which is arranged in a tunnel and can shorten the construction period. The problems that in the background technology, the whole equipment is too wide and too high, construction of other working procedures can be affected in a tunnel, synchronous construction with the other working procedures cannot be achieved, the construction period of a whole project is prolonged, and the construction cost is increased are solved. According to the technical scheme for solving the technical problem, the device is divided into two or more modules, the modules are connected through a plurality of pipelines, and the modules comprise a compressor unit and a compressor, an oil separator, an oil cooler, an economizer and a first throttling valve in accessory equipment of the compressor unit; and the plurality of modules further comprise a condenser, a throttle valve II and an evaporator in a saline water secondary cooling auxiliary machine unit and accessory equipment of the saline water secondary cooling auxiliary machine unit. The method is suitable for stratum freezing construction in the tunnel.

Description

Technical Field

[0001] The utility model belongs to refrigeration technology, in particular to a low-temperature salt water refrigeration device which is placed in a tunnel and can shorten the construction period. Background Art

[0002] At present, the existing ground freezing technologies in the industry are divided into three types: brine freezing, liquid nitrogen freezing and low-temperature carbon dioxide freezing. Among them, brine freezing is the most common and widely used. The problem with conventional brine freezing units is that they are an integral device. Due to the narrow space in the tunnel, the overall width and height of the equipment will affect the construction of other processes in the tunnel and cannot be synchronized with other processes. The ground can only be frozen after other processes in the tunnel are completed. The ground freezing time is generally very long, which will cause the entire project construction period to be extended and the construction cost to increase. Utility Model Content

[0003] The purpose of the utility model is to propose a low-temperature brine refrigeration device placed in a tunnel to shorten the construction period, so as to solve the problems existing in the background technology: because the equipment is too wide and too high, when placed in the tunnel, it will occupy a very wide passage, affecting the construction of other processes and unable to be constructed synchronously with other processes, resulting in the extension of the construction period of the entire project and increased construction costs. The technical solution adopted to solve the technical problem is: a low-temperature brine refrigeration device placed in a tunnel to shorten the construction period, wherein the refrigeration system is: the refrigerant circulation is: the compressor exhaust port is connected to the oil separator, condenser, economizer B port and C port, throttle valve 2, evaporator F port and G port in sequence through a pipeline to return to the compressor suction port, and the A port in the pipeline is connected to the throttle valve 1, economizer D port and E port in sequence through a pipeline to return to the compressor air supply port; the oil circulation is: the oil separator oil outlet is connected to the oil cooler through a pipeline and returns to the compressor oil inlet, and the brine circulation is: the evaporator I port is connected to the brine pump outside the equipment and the terminal freezing device outside the equipment through a pipeline in sequence to return to the evaporator H port; the characteristic is: the device is divided into two or more modules, and the modules are connected by a number of pipelines, and the modules include: the compressor, oil separator, oil cooler, economizer, throttle valve 1 in the compressor unit and its ancillary equipment; the modules also include: the condenser, throttle valve 2, and evaporator in the brine cooling auxiliary machine unit and its ancillary equipment. Each module is 1 to 2 meters wide and 2 to 3 meters high. The evaporator is either a dry evaporator, a siphon evaporator, or a flooded evaporator. The condenser is either a horizontal water-cooled condenser with a siphon tank function, or a conventional water-cooled condenser. The compressor is either a single-stage compressor or a single-machine two-stage compressor. The number of compressors is single or multiple. The economizer is either a dry type, a flooded type, or a flash tank type. When the compressor is a single-machine two-stage compressor, the low-pressure stage is either with an economizer or without an economizer. Each module in this refrigeration device is either arranged left and right in a horizontal shaft, or arranged up and down in a vertical shaft. The refrigerant is either Freon or ammonia.

[0004] The B port of the economizer is the liquid inlet, the C port of the economizer is the liquid outlet, the D port of the economizer is the liquid inlet on the evaporation side, and the E port of the economizer is the gas outlet on the evaporation side. The F port of the evaporator is the refrigerant inlet, the G port of the evaporator is the refrigerant outlet, the I port of the evaporator is located at the liquid outlet of the low-temperature brine, and the H port of the evaporator is located at the liquid inlet of the low-temperature brine.

[0005] Compared with the prior art, the utility model has the following beneficial effects: the above technical solution is used for freezing construction in tunnels. On the one hand, several modules include: compressor, oil separator, oil cooler, economizer and throttle valve 1 in the compressor unit and its ancillary equipment; several modules also include: condenser, throttle valve 2 and evaporator in the brine cooling auxiliary machine unit and its ancillary equipment; several modules are connected by several pipelines, so that the device realizes modularization under the premise of complete equipment, and the width of each module is not more than 2 meters. Because the cross-section of the tunnel is circular, the height of the equipment is also limited when it is placed on one side. Now the overall height of each module is no more than 3 meters. When it is placed on one side of the tunnel, the remaining channel width can reach 3.5 meters, which greatly reduces the size of the equipment on one side of the tunnel. The freezing of the stratum can be carried out simultaneously with other processes in the tunnel without affecting each other, so as to finally achieve the purpose of shortening the construction period of the entire project and reducing the construction cost; on the other hand, On the one hand: when the evaporator adopts a siphon evaporator, the problem of uneven liquid supply of the dry evaporator is solved. Compared with the full liquid evaporator, the refrigerant runs through the shell, which makes the system have higher heat transfer performance; on the other hand: the condenser adopts a horizontal water-cooled condenser with the function of a siphon tank, and the liquid inlet end face of the oil-cooled liquid outlet is lower than the liquid inlet end face of the liquid outlet, ensuring the reliability of the oil-cooled liquid supply; on the other hand: when the compressor selects a single-machine two-stage compressor, it is more energy-saving when the evaporation temperature is below -30℃; on the other hand: when there are two compressors, when one fails, there is still one that can continue to work, and the on-site freezing equipment does not need to be shut down and continues to perform stratum freezing work; on the other hand, when the economizer adopts the flash tank form, the temperature of the refrigerant liquid is lower and the economy of the system is better; on the other hand, this refrigeration device can be used in different fields. According to the actual application occasions and the on-site installation size, it can be arranged either left and right in the horizontal shaft, or arranged up and down in the vertical shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of two modules of the utility model. Figure 2 yes Figure 1 Left view of . Figure 3 It is a schematic diagram of the pipelines of two modules of the utility model. Figure 4 This is a diagram showing the equipment of the utility model in position in a tunnel. DETAILED DESCRIPTION

[0007] Example: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period, wherein the refrigeration system is: the refrigerant cycle is: the exhaust port of the compressor 4 is connected to the oil separator 3, the condenser 1, the B port and the C port of the economizer 6, the throttle valve 2 7, the F port and the G port of the evaporator 8 in sequence through a pipeline to return to the compressor 4 suction port, and the A port in the pipeline is connected to the throttle valve 1 5, the D port and the E port of the economizer 6 in sequence through a pipeline to return to the compressor 4 air supply port; the oil cycle is: the oil outlet of the oil separator 3 is connected to the oil cooler 2 through a pipeline and returns to the oil inlet of the compressor 4, and the brine cycle is: the I port of the evaporator 8 is connected to the brine pump 9 outside the device and the terminal freezing device 10 outside the device in sequence through a pipeline to return to the H port of the evaporator 8; the characteristic is that: the device is divided into two modules, A and B, and the module A contains : The compressor unit and its ancillary equipment include compressor 4, oil separator 3, oil cooler 2, economizer 6, and throttle valve 1 5; module B includes: the condenser 1, throttle valve 2 7, and evaporator 8 of the brine cooling auxiliary unit and its ancillary equipment. Modules A and B are arranged on the left and right in the horizontal shaft and connected by several pipelines, so that the device realizes modularization under the premise of complete equipment; each module is 1.2 meters wide and 2.5 meters high. When placed on one side of the tunnel, the remaining channel width can reach 3.5 meters, and the ground freezing can be carried out simultaneously with other processes in the tunnel without affecting each other; the evaporator 8 is a dry evaporator; the condenser 1 is a conventional water-cooled condenser; the compressor 4 is a single-stage compressor; the number of compressors 4 is single; the economizer 6 is dry; the refrigerant is Freon.

Claims

1. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period, wherein the refrigeration system is: the refrigerant circulation is: the exhaust port of the compressor (4) is connected to the oil separator (3), condenser (1), economizer (6) B port and C port, throttle valve 2 (7), evaporator (8) F port and G port in sequence through a pipeline and returns to the compressor (4) suction port, and the A port in the pipeline is connected to the throttle valve 1 (5), economizer (6) D port and E port in sequence through a pipeline and returns to the compressor (4) air supply port; the oil circulation is: the oil outlet of the oil separator (3) is connected to the oil cooler (2) through a pipeline and returns to the compressor (4) oil inlet, and the brine circulation is: the I port of the evaporator (8) is connected to the brine pump (9) outside the device and the terminal freezing device (10) outside the device through a pipeline and returns to the H port of the evaporator (8); the characteristics are: The device is divided into two or more modules, which are connected by a number of pipelines. The modules include: a compressor (4), an oil separator (3), an oil cooler (2), an economizer (6), and a throttle valve 1 (5) in a compressor unit and its ancillary equipment; the modules also include: a condenser (1), a throttle valve 2 (7), and an evaporator (8) in a brine cooling auxiliary unit and its ancillary equipment.

2. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1, characterized in that: Each module is 1 to 2 meters wide and 2 to 3 meters high.

3. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: The evaporator (8) is either a dry evaporator, a siphon evaporator, or a flooded evaporator.

4. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: The condenser (1) is either a horizontal water-cooled condenser with the function of a siphon tank, or a conventional water-cooled condenser.

5. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: The compressor (4) is either a single-stage compressor or a single-unit two-stage compressor.

6. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: The number of compressors (4) is single or multiple.

7. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: The economizer (6) is either of the dry type, the flooded type, or the flash tank type.

8. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: Compressor (4) When a single two-stage compressor is selected, the low-pressure stage is either provided with an economizer or without an economizer.

9. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: Each module in this refrigeration device is either arranged left and right in a horizontal shaft, or arranged up and down in a vertical shaft.

10. A low-temperature brine refrigeration device placed in a tunnel to shorten the construction period according to claim 1 or 2, characterized in that: The refrigerant is either Freon or ammonia.

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