Split type tunnel intelligent ventilation refrigeration system

Abstract

The application discloses a split type tunnel intelligent ventilation refrigeration system, which comprises a refrigeration host, a wind cabinet, connecting pipelines and a control system, the refrigeration host is connected with the cold end of a heat exchanger in the wind cabinet through the connecting pipelines, the refrigeration host changes cooling water brought by a shield machine into ice water through heat exchange, and the wind cabinet exchanges heat between the ice water and air to cool the air; the wind cabinet adopts an inner thread copper pipe outer sleeve hydrophilic aluminum foil fin, and adopts a sectional type design. Compared with the prior art, the split type tunnel intelligent ventilation refrigeration system is a professional customized product for special operation conditions of the shield machine, can efficiently provide a cool and comfortable working environment for shield operation personnel, and creates favorable conditions for improving work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of refrigeration, and particularly relates to a split type intelligent ventilation refrigeration system for tunnel shield construction. BACKGROUND

[0002] The tunnel shield construction environment is underground, the working face is high in humidity and heat, and this seriously endangers the health of construction personnel and the safety of equipment. During the construction process, the shield machine generates a large amount of heat, the ambient air circulation is poor, and the tunnel construction has the characteristics of high temperature and high humidity. According to the requirements of the Technical Specification for Safety in Railway Tunnel Engineering Construction (TB10304-2020), the construction environment temperature should not exceed 28℃. However, most shield tunnel constructions cannot meet this requirement. At present, the main methods for cooling the shield construction tunnel are to cool the heat source of the shield machine through external circulating water and to send fresh air into the tunnel through the tunnel ventilation pipe by a fan, but in the hot summer, the temperature of the circulating water and the forced ventilation is above 30 degrees, and combined with the heat source of the shield machine, the construction personnel often work in a humid and hot environment of 40℃ or even higher. The methods currently adopted by construction units are generally to freeze ice blocks outside the tunnel, transport the prepared ice blocks into the tunnel, or increase multiple air blowers to relay the fresh air from the outside of the hole to exhaust the hot air in the hole, but these methods cannot fundamentally solve the problem. SUMMARY

[0003] In order to overcome the problem of high temperature and high humidity in the working area during tunnel construction, the present application provides a split type intelligent ventilation refrigeration system to effectively improve the human comfort of the working environment and improve the work efficiency.

[0004] To solve the above technical problems, the technical scheme of the present application is as follows:

[0005] A split type intelligent ventilation refrigeration system, comprising a refrigeration host, an air cabinet, a connecting pipeline and a control system, the refrigeration host is connected with the cold end of the heat exchanger in the air cabinet through the connecting pipeline, the refrigeration host cools the cooling water of the shield machine into ice water through heat exchange, and the air cabinet exchanges heat between the ice water and the air to cool the air; the air cabinet adopts an inner threaded copper pipe with a hydrophilic aluminum foil fin, and the air cabinet adopts a segmented design.

[0006] Further, the ice water in the air cabinet after heat absorption returns to the evaporator in the refrigeration host, exchanges heat with the refrigerant liquid in the evaporator which has been compressed, condensed, high-pressured and low-temperature, becomes low-temperature ice water, and is sent back to the cold end of the heat exchanger in the air cabinet through the circulating pump arranged on the connecting pipeline to absorb heat, thereby forming a refrigeration cycle.

[0007] Further, a buffer water tank is arranged on the connecting pipeline between the refrigeration host and the air cabinet, and the buffer water tank and the refrigeration host form an inner circulation pipeline, and the buffer water tank and the air cabinet form an outer circulation pipeline; the circulation pump comprises an ice water inner circulation pump arranged in the inner circulation pipeline and an ice water outer circulation pump arranged in the outer circulation pipeline, and the outlets on both sides of the buffer water tank are connected with the ice water inner circulation pump and the ice water outer circulation pump respectively; the outlet of the ice water inner circulation pump is connected with the inlet of the refrigeration host, so as to ensure the flow of the refrigeration host; the outlet of the ice water outer circulation pump is connected with the cold end inlet of the heat exchanger in the air cabinet, so as to provide ice water for heat exchange with air for the air cabinet, so that the air is changed into cold air; the buffer water tank is used for mixing the outer circulation ice water from the air cabinet and the inner circulation ice water from the refrigeration host, so that the outer circulation ice water is lowered to 5 DEG C, and is sent to the air cabinet through the ice water outer circulation pump.

[0008] Further, a temperature sensor is arranged on the air supply pipeline of the air cabinet, and the temperature sensor detects the temperature of the air cooled by the air cabinet; the control system is connected with the temperature sensor and the refrigeration host respectively, and the refrigeration host is controlled to perform staged refrigeration according to the air temperature detected by the temperature sensor: when the air temperature after 1-stage refrigeration operation cannot reach the preset air outlet temperature requirement, 2-stage refrigeration is loaded to perform a refrigeration cycle; if the air temperature still cannot reach the set requirement, 3-stage and 4-stage refrigeration are loaded in turn to perform a refrigeration cycle, so as to meet the preset air outlet temperature; when the air temperature is low, the compressor of the refrigeration host is unloaded in turn, so as to maintain a constant air outlet temperature requirement.

[0009] Further, the refrigeration host and the buffer water tank are installed on one side of the shield machine trolley, and the air cabinet is placed on the top of the shield machine trolley and is connected with the ventilation pipe on the top of the trolley in series.

[0010] Further, the ventilation pipe is connected with a blower, and the air outside the tunnel enters the air cabinet through the ventilation pipe under the driving of the blower.

[0011] Further, the outer circulation pipeline comprises an outer circulation main pipe connected with the buffer water tank and outer circulation branch pipes connected with the air fans respectively, and the outer circulation branch pipes of the air fans are all provided with isolation valves for opening and closing the control pipeline.

[0012] Compared with the prior art, the split type tunnel intelligent ventilation refrigeration system is a professional customized product for the special working condition of the shield machine, and can efficiently provide a cool and comfortable working environment for the shield working personnel, so as to create favorable conditions for improving the working efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure principle diagram of the split type tunnel intelligent ventilation refrigeration system;

[0014] Figure 2The application discloses a mounting diagram of a split type tunnel intelligent ventilation refrigeration system.

[0015] The application discloses a mounting diagram of a split type tunnel intelligent ventilation refrigeration system. DETAILED DESCRIPTION

[0016] The technical solutions of the application will be clearly and completely described below with reference to the drawings, obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0017] The application discloses a split type tunnel intelligent ventilation refrigeration system, which is used for cooling and cooling a shield tunneling area in a shield tunneling construction environment and improving the high-temperature and high-humidity environment of a working interval in tunnel construction.

[0018] Please refer to Figure 1 , in order to overcome the problem of high temperature and high humidity in tunnel construction, the application provides a split type tunnel intelligent ventilation refrigeration system, which comprises a refrigeration host 1, a buffer water tank 2, an air cabinet 3, a circulating pump, a connecting pipeline 6 and a control system (not shown in the figure).

[0019] As shown in Figure 2 , the refrigeration host 1 and the buffer water tank 2 are installed on one side of a shield tunneling vehicle 9, the air cabinet 3 is connected with a ventilation pipe on the top of the shield tunneling vehicle 9 in series, the ventilation pipe is connected with a blower, and air (namely fresh air) outside the tunnel is driven by the blower to pass through the ventilation pipe and enter the air cabinet 3.

[0020] In order to enhance the heat exchange effect, in the embodiment, the air cabinet 3 adopts an inner thread copper pipe with a hydrophilic aluminum foil fin outside to increase the turbulence coefficient. In order to be conveniently placed on the top of the shield tunneling vehicle 9, the air cabinet 3 adopts a sectional design, and the on-site hoisting and installation are facilitated.

[0021] The refrigeration process of the application is that the refrigeration host 1 is connected with a cold end of a heat exchanger in the air cabinet 3 through the connecting pipeline 6, the refrigeration host 1 changes cooling water of the shield tunneling vehicle into ice water through heat exchange, and the air cabinet 3 exchanges heat between the ice water and air to cool the air; the ice water in the air cabinet 3 after absorbing heat returns to an evaporator in the refrigeration host 1, exchanges heat with refrigerant liquid in the evaporator after compression, condensation, high pressure and low temperature, becomes low-temperature ice water, and is sent back to the cold end of the heat exchanger in the air cabinet 3 through the circulating pump arranged on the connecting pipeline 6 to absorb heat, so that a refrigeration cycle is formed.

[0022] The buffer water tank 2 is arranged on the connecting pipeline between the refrigeration host 1 and the air cabinet 3, and forms an inner circulation pipeline between the refrigeration host 1 and the buffer water tank 2 and an outer circulation pipeline between the buffer water tank 2 and the air cabinet 3; the circulation pump comprises an ice water inner circulation pump 4 arranged in the inner circulation pipeline and an ice water outer circulation pump 5 arranged in the outer circulation pipeline, and the outlets on both sides of the buffer water tank 2 are connected with the ice water inner circulation pump 4 and the ice water outer circulation pump 5 respectively; the outlet of the ice water inner circulation pump 4 is connected with the inlet of the refrigeration host 1, and is used for ensuring the flow of the refrigeration host 1; the outlet of the ice water outer circulation pump 5 is connected with the cold end inlet of the heat exchanger in the air cabinet 3, and is used for providing ice water for the air cabinet 3 to exchange heat with air, so that the air is changed into cold air; the buffer water tank 2 is used for mixing the outer circulation ice water from the air cabinet 3 and the inner circulation ice water from the refrigeration host 1, so that the outer circulation ice water is lowered to 5 DEG C, and is sent to the air cabinet 3 by the ice water outer circulation pump 5.

[0023] The outer circulation pipeline comprises an outer circulation main pipeline connected with the buffer water tank and outer circulation branch pipelines connected with the respective air fans, and the outer circulation branch pipelines of the respective air fans are respectively provided with isolation valves (not shown in the figure) for controlling the opening and closing of the pipelines.

[0024] The temperature sensor is arranged on the air feeding pipeline of the air cabinet 3, and is used for detecting the temperature of the air cooled by the air cabinet 3. The control system is respectively connected with the temperature sensor and the refrigeration host 1, and controls the refrigeration host 1 to perform staged refrigeration according to the air temperature detected by the temperature sensor: when the air temperature after the first stage refrigeration operation (the temperature of the air cooled by the air cabinet 3) does not reach the preset air outlet temperature requirement, the second stage refrigeration is loaded to perform the refrigeration cycle; if the air temperature still does not reach the set requirement, the third stage and the fourth stage are sequentially loaded to perform the refrigeration cycle, so as to meet the preset air outlet temperature requirement; when the air temperature is relatively low, the compressor of the refrigeration host is sequentially unloaded, and a constant air outlet temperature requirement is maintained, so that the comfort requirement of the operating personnel is met, and the operation cost of the ventilation refrigeration system is minimized.

[0025] The working mode of the split type tunnel intelligent ventilation refrigeration system is as follows:

[0026] 1) The air (fresh air) outside the tunnel is driven by the air feeding fan to enter the air cabinet 3 through the air feeding pipeline;

[0027] 2) The air is cooled by heat exchange with ice water in the air cabinet 3, and then enters the shield tunneling area through the air feeding pipeline, and cools and lowers the temperature of the area;

[0028] 3) The ice water after heat exchange with the air in the air cabinet 3 returns to the buffer water tank 2 through the outer circulation pipeline, is mixed with the ice water from the refrigeration host 2, is lowered to 5 DEG C after temperature reduction, and is then extracted by the ice water outer circulation pump 5 to enter the outer circulation pipeline to the air cabinet 3, so as to form refrigeration outer circulation;

[0029] 4) the water in the buffer water tank 2 is sent into the evaporator in the refrigeration host 1 by the ice water internal circulation pump 4 through the internal circulation pipeline, exchanges heat with the refrigerant liquid which is compressed, condensed, high pressure and low temperature in the evaporator, becomes low-temperature ice water, and returns to the buffer water tank 2 through the internal circulation pipeline, and is mixed with the ice water from the air cabinet 3, so as to form the refrigeration internal circulation;

[0030] 5) the temperature of the air cooled from the air cabinet 3 is detected by the temperature sensor on the air supply pipeline; when the air outlet temperature after the 1st stage refrigeration operation cannot reach the preset air outlet temperature requirement, the 2nd stage refrigeration is loaded to perform the refrigeration cycle; if the air outlet temperature still cannot reach the set requirement, the 3rd stage and the 4th stage refrigeration are loaded in turn to perform the refrigeration cycle, so as to meet the preset air outlet temperature; when the air outlet temperature is low, the refrigeration compressor will be unloaded in turn to maintain a constant air outlet temperature requirement, which meets the comfort requirement of the operating personnel and maximally reduces the operation cost of the ventilation refrigeration system.

[0031] The split type tunnel intelligent ventilation refrigeration system utilizes the external circulation cooling water of the shield machine and the tunnel ventilation, increases the refrigeration unit and the refrigerated water circulation system to perform secondary cooling on the air entering the tunnel through the ventilation system, and finally sends the cooled cold air to the construction operation surface (segment assembly area) through the secondary air fan. The air temperature after the secondary cooling through the system is 10-12℃ lower than the inlet temperature, so that the construction area is effectively cooled, and the environmental temperature is suitable for the construction operation.

[0032] For those skilled in the art, other various corresponding changes and deformations can be made according to the above-described technical solutions and concepts, and all these changes and deformations should belong to the protection scope of the claims of the present application.

Claims

1. A split type tunnel intelligent ventilation refrigeration system, characterized in that, The refrigeration system comprises a refrigeration host, a wind cabinet, connecting pipelines and a control system, the refrigeration host is connected with the cold end of the heat exchanger in the wind cabinet through the connecting pipelines, the refrigeration host exchanges heat between the cooling water of the shield tunneling machine and the cooling water to make the cooling water into ice water, and the wind cabinet exchanges heat between the ice water and the air to cool the air; the wind cabinet adopts an inner thread copper pipe and a hydrophilic aluminum foil fin, and adopts a sectional design; the ice water in the wind cabinet after heat absorption returns to the evaporator in the refrigeration host, exchanges heat with the refrigerant liquid in the evaporator after compression, condensation, high pressure and low temperature, becomes low-temperature ice water, and is sent back to the cold end of the heat exchanger in the wind cabinet through the circulating pump arranged on the connecting pipeline, so as to form a refrigeration cycle; A buffer water tank is arranged on the connecting pipeline between the refrigeration host and the wind cabinet, an inner circulation pipeline is formed between the buffer water tank and the refrigeration host, and an outer circulation pipeline is formed between the buffer water tank and the wind cabinet; the circulating pump comprises an ice water inner circulating pump arranged in the inner circulation pipeline and an ice water outer circulating pump arranged in the outer circulation pipeline, the outlets on both sides of the buffer water tank are connected with the ice water inner circulating pump and the ice water outer circulating pump respectively, the outlet of the ice water inner circulating pump is connected with the inlet of the refrigeration host, and the ice water outer circulating pump is used for guaranteeing the flow of the refrigeration host; the outlet of the ice water outer circulating pump is connected with the inlet of the cold end of the heat exchanger in the wind cabinet, and the ice water outer circulating pump is used for providing the ice water for heat exchange with the air for the wind cabinet, so that the air is changed into cold air; the buffer water tank is used for mixing the outer circulation ice water from the wind cabinet and the inner circulation ice water from the refrigeration host, so that the outer circulation ice water is lowered to 5 DEG C and is sent to the wind cabinet through the ice water outer circulating pump.

2. The split-type tunnel intelligent ventilation and refrigeration system according to claim 1, characterized in that, A temperature sensor is arranged on the air supply pipeline of the wind cabinet, the temperature sensor detects the temperature of the air cooled by the wind cabinet, the control system is connected with the temperature sensor and the refrigeration host respectively, and the refrigeration host is controlled to perform staged refrigeration according to the air temperature detected by the temperature sensor: when the air temperature after 1-stage refrigeration operation does not reach the preset air outlet temperature requirement, 2-stage refrigeration is loaded to perform the refrigeration cycle; if the air temperature still does not reach the set requirement, 3-stage and 4-stage refrigeration are loaded in sequence to perform the refrigeration cycle, so as to meet the preset air outlet temperature requirement; when the air temperature is low, the compressor of the refrigeration host is unloaded in sequence to maintain a constant air outlet temperature requirement.

3. The split-type tunnel intelligent ventilation and refrigeration system according to claim 1, characterized in that, The refrigeration host and the buffer water tank are installed on one side of the shield tunneling machine trolley, the wind cabinet is placed on the top of the shield tunneling machine trolley and is connected with the ventilation pipe on the top of the trolley in series.

4. The split-type tunnel intelligent ventilation and refrigeration system according to claim 3, characterized in that, The ventilation pipe is connected with an air supply fan, the air outside the tunnel is driven by the air supply fan to pass through the ventilation pipe and enter the wind cabinet.

5. The split-type tunnel intelligent ventilation and refrigeration system according to claim 1, characterized in that, The outer circulation pipeline comprises an outer circulation main pipe connected with the buffer water tank and outer circulation branch pipes connected with the air supply fans respectively, and the outer circulation branch pipes of the air supply fans are all provided with isolation valves for opening and closing the control pipeline.

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