CN211258686U

CN211258686U - Colliery is refrigerating system in pit

Info

Publication number: CN211258686U
Application number: CN201922277187.0U
Authority: CN
Inventors: 付兴亚
Original assignee: Changshun Anda Hebei Measurement And Control Technology Co ltd; Beijing Changshun Anda Measurement And Control Technology Co ltd
Current assignee: Changshun Anda Hebei Measurement And Control Technology Co ltd; Beijing Changshun Anda Measurement And Control Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-08-14
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a colliery is refrigerating system in pit, include: the oil separator comprises a compressor, two oil separators, a condenser, a drying filter, an expansion valve, an evaporator, an axial flow fan, a first exhaust main pipe, a second exhaust main pipe, an oil return main pipe, two first exhaust branch pipes, two second exhaust branch pipes and two oil return branch pipes, wherein a gas phase balance valve is arranged at the upper part of each oil separator, a liquid phase balance valve is arranged at the lower part of each oil separator, the gas phase balance valves of the oil separators are communicated with one another, and the liquid phase balance valves of the oil separators are communicated with one another. The utility model discloses a two oil separator parallel structure replace an oil separator, can solve the shortcoming that single oil separator volume is too big, high too high, the refrigerating system of being convenient for transportation, installation, maintenance in the colliery in the limited colliery in space.

Description

Colliery is refrigerating system in pit

Technical Field

The utility model belongs to the technical field of the refrigeration and specifically relates to a colliery is refrigerating system in pit who uses in the colliery.

Background

In order to solve the problem of thermal disasters in the underground coal mine and improve the high-temperature working environment of underground mining personnel in the coal mine, a refrigeration system is widely applied to the underground coal mine, the traditional refrigeration system mostly adopts a single compressor and a single oil separation structure, and the installation, the overhaul and the maintenance of the refrigeration system are not facilitated due to the large volume of a single oil separator and the limited space in the underground coal mine.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a colliery is refrigerating system in pit to the not enough of prior art.

In order to achieve the above object, the utility model provides a colliery is refrigerating system in pit, include: the air outlet of the compressor is communicated with the air inlet of the oil separator through the first air exhaust main pipe and the two first air exhaust branch pipes, the air outlets of the two oil separators are communicated with the gaseous refrigerant inflow port of the condenser through the two second air exhaust branch pipes and the second air exhaust main pipe, and the liquid refrigerant outflow port of the condenser is communicated with the drying filter, the drying filter is communicated with the expansion valve, the expansion valve is communicated with the evaporator, the evaporator is communicated with an air suction port of the compressor, and oil outlets of the two oil separators are communicated with an oil return port of the compressor through the two oil return branch pipes and the oil return main pipe.

Further, the compressor is an open screw compressor.

Further, the condenser is a shell-and-tube heat exchanger.

Further, the axial flow fan is an explosion-proof axial flow fan.

Further, the expansion valve is a thermostatic expansion valve.

The utility model has the advantages that: 1) the parallel structure of the two oil separators is adopted to replace one oil separator, so that the defects of overlarge volume and overhigh height of a single oil separator can be overcome, and the refrigeration system is convenient to transport, install, overhaul and maintain under a coal mine with limited space; 2) the two oil separators are provided with gas phase balance valves which are communicated with each other, and liquid phase balance valves which are communicated with each other, so that the top pressure balance and the liquid level of the two oil separators can be respectively ensured to be the same.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Wherein: the system comprises a compressor 1, an oil separator 2, a condenser 3, a drying filter 4, an expansion valve 5, an evaporator 6, an axial flow fan 7, a first exhaust manifold 8, a second exhaust manifold 9, an oil return manifold 10, a gas phase balance valve 201, a liquid phase balance valve 202, a first exhaust branch pipe 801, a second exhaust branch pipe 901 and an oil return branch pipe 101.

Detailed Description

The present invention will be further described with reference to the following drawings and examples, but the present invention is not limited thereto.

Referring to fig. 1, a coal mine underground refrigeration system includes: the system comprises a compressor 1, two oil separators 2, a condenser 3, a drying filter 4, an expansion valve 5, an evaporator 6, an axial flow fan 7, a first exhaust manifold 8, a second exhaust manifold 9, an oil return manifold 10, two first exhaust branch pipes 801, two second exhaust branch pipes 901 and two oil return branch pipes 101, wherein a gas phase balance valve 201 is arranged at the upper part of each oil separator 2, a liquid phase balance valve 202 is arranged at the lower part of each oil separator 2, the gas phase balance valves 201 of each oil separator 2 are communicated with each other, the liquid phase balance valves 202 of each oil separator 2 are communicated with each other, an exhaust port of the compressor 1 is communicated with an air inlet of each oil separator 2 through the first exhaust manifold 8 and the two first exhaust branch pipes 801, exhaust ports of the two oil separators 2 are communicated with a gas-state inlet of the condenser 3 through the two second exhaust branch pipes 901 and the second exhaust manifold 9, the liquid refrigerant outflow port of the condenser 3 is communicated with the dry filter 4, the dry filter 4 is communicated with the expansion valve 5, the expansion valve 5 is communicated with the evaporator 6, the evaporator 6 is communicated with the air suction port of the compressor 1, and the oil outlets of the two oil separators 2 are communicated with the oil return port of the compressor through the two oil return branch pipes 101 and the oil return header pipe 10.

Further, the compressor 1 is an open screw compressor.

Further, the condenser 3 is a shell-and-tube heat exchanger.

Further, the axial flow fan 7 is an explosion-proof axial flow fan.

Further, the expansion valve 5 is a thermostatic expansion valve.

When in use: the compressor 1 compresses sucked refrigerant gas, and after the refrigerant is compressed, the pressure and the temperature are simultaneously increased to form high-temperature and high-pressure refrigerant steam; the high-temperature high-pressure refrigerant steam is mixed with the lubricating oil, enters the oil separator 2 through the first exhaust manifold 8 and the first exhaust branch pipe 801, and is separated into the high-temperature high-pressure refrigerant steam and the liquid lubricating oil through the oil separator 2; the liquid lubricating oil is conveyed into the compressor through an oil return branch pipe 101 and an oil return main pipe 10; refrigerant vapor enters the condenser 3 through the second exhaust branch 901 and the second exhaust manifold 9, is cooled in the condenser 3 by cooling water, and is condensed into high-pressure liquid refrigerant, the high-pressure liquid refrigerant flows into the thermostatic expansion valve 5 through the drying filter 4, is throttled and depressurized through the thermostatic expansion valve 5, the pressure of the high-pressure liquid refrigerant rapidly drops, the high-pressure liquid refrigerant enters the evaporator 6, the liquid refrigerant is evaporated in the evaporator 6, absorbs heat of air flow through the pipe wall, is rapidly evaporated into gas, and is then sucked into the compressor 1, so that the circulating work of the whole system is realized, and the air flowing through the evaporator 6 is reduced in temperature by the heat absorbed by the refrigerant, and is blown to a place needing cooling by the axial flow fan 7.

The above is an embodiment of the present invention, and not therefore limiting the application claims of the present invention, all applications of the equivalent structure changes made by the description and the drawings are all included in the protection scope of the present invention.

Claims

1. A colliery is refrigerating system in pit includes: compressor, two oil separator, condenser, drier-filter, expansion valve, evaporimeter, axial fan, first exhaust manifold, second exhaust manifold, oil return manifold, two first exhaust branch, two second exhaust branch, two oil return branch, its characterized in that: the upper part of the oil separator is provided with a gas phase balance valve, the lower part of the oil separator is provided with a liquid phase balance valve, the gas phase balance valves of the oil separators are communicated with each other, the liquid phase balance valves of the oil separators are communicated with each other, the exhaust ports of the compressor are communicated with the air inlets of the oil separators through the first exhaust manifold and the two first exhaust branch pipes, the exhaust ports of the two oil separators are communicated with the gaseous refrigerant inflow port of the condenser through the two second exhaust branch pipes and the second exhaust manifold, the liquid refrigerant outflow port of the condenser is communicated to the dry filter, the dry filter is communicated to the expansion valve, the expansion valve is communicated to the evaporator, the evaporator is communicated to an air suction port of the compressor, and oil outlets of the two oil separators are communicated with an oil return port of the compressor through the two oil return branch pipes and the oil return header pipe.

2. The coal mine underground refrigeration system according to claim 1, characterized in that: the compressor is an open screw compressor.

3. The coal mine underground refrigeration system according to claim 1, characterized in that: the condenser is a shell-and-tube heat exchanger.

4. The coal mine underground refrigeration system according to claim 1, characterized in that: the expansion valve is a thermostatic expansion valve.