CN216741594U - Waste heat recovery device for tunnel rail top air duct of subway station - Google Patents

Abstract

The utility model relates to a waste heat recovery device for a tunnel rail top air duct of a subway station, which is characterized in that: the device comprises an air port panel provided with a plurality of first air grooves and second air grooves, a waste heat recovery structure arranged above the air port panel, an adjusting mechanism used for lifting the waste heat recovery structure, and a recovery pipeline connecting the waste heat recovery structure and an external heat pump system; the waste heat recovery structure comprises a plurality of heat exchange units which are connected into a whole through a support, the heat exchange units are rotatably positioned on the air port panel, a heat exchange tube is arranged in each heat exchange unit, and the heat exchange tubes of all the heat exchange units are communicated with a recovery pipeline; the first air groove is arranged below the heat exchange unit, the heat exchange unit blocks the first air groove when the waste heat recovery structure descends, and the first air groove is opened when the waste heat recovery structure ascends. The device has the characteristics of good heat removal effect and low energy consumption.

Description

Waste heat recovery device for tunnel rail top air duct of subway station

Technical Field

The utility model relates to an energy-saving device for waste heat recovery, in particular to a waste heat recovery device for a tunnel top air duct of a subway station.

Background

With the gradually increasing requirements of rail transit construction on energy conservation and emission reduction, line operation is also exploring how to recycle waste heat generated in line operation and reduce the energy consumption of heat extraction equipment, so as to achieve the effects of energy conservation and emission reduction. There is the heat that a large amount of circuit operation produced in the subway tunnel, and wherein the heat that the station tunnel contains mainly includes train operation heat production, contact net energy loss heat production, piston wind heat transfer volume, platform and tunnel heat transfer volume, country rock soil heat transfer volume etc.. At present, the heat removal mode of the station tunnel is mainly to remove heat through a station tunnel ventilation system (a heat removal air duct at the top and the bottom of a rail in a station tunnel structure). In the urban tunnel in the hot summer and warm winter area, the heat exhausting fan is basically started in the whole operating period of the year so as to prevent the temperature in the tunnel from being overhigh, and therefore, the energy consumption is higher.

It is known that about 60% of the heat of the train in the deceleration stage enters the station tunnel; when the train is stopped, the heat in the train air-conditioning condenser and the carriage is dissipated into the air through the top of the carriage to rapidly heat the periphery, and the station rail top air duct exhausts the dissipated heat to the outside so as to reach the standard that the highest temperature in a tunnel in summer does not exceed 40 ℃; a large part of the heat generated when the train departs is also dissipated in the station tunnel. Considerable heat can be generated, especially when the line runs in dense lots. The heat in the subway station tunnel is a low-grade heat source with high quality and large total amount, waste heat recovery can be carried out for secondary utilization through a heat pump technology, such as regional heating, station living hot water supply and the like, meanwhile, the heat extraction effect in the station tunnel can be improved, and the energy consumption of heat extraction equipment is reduced.

The patent number "a 45 adjustable subway rail top exhaust valve device of built-in type and exhaust system" of patent No. CN 214325095U sets up adjustable subway rail top exhaust valve device through row hot-blast main at the rail top, realizes that the even of rail top heat extraction system is aired exhaust in order to reduce rail top wind channel main pipe ventilation resistance, reduces the operation energy consumption of heat extraction fan. The utility model only considers the improvement of the air exhaust efficiency of the rail top air channel, does not consider the utilization of a waste heat air source in the rail top air channel on the device, and assists in reducing the operation energy consumption of the heat exhausting fan.

The patent No. CN 106052194A discloses a modular subway heat recovery system and a control method thereof, which are characterized in that a plurality of water/air heat pump units are arranged in a tunnel, and heat in piston air and exhaust air is recovered through a heat recovery water supply pipe and a heat recovery water return pipe which are arranged in a rail top air channel. The utility model does not embody the corresponding heat recovery device and the interface relation between the heat recovery device and the subway structure when explaining the heat recovery system and the control method thereof.

The patent No. CN 204830262U discloses a capillary tube wall heat exchanger in a subway tunnel, which is characterized in that the capillary tube heat exchanger is laid in the concrete of the subway tunnel wall to absorb the heat of the tunnel and the soil, and the direction of a four-way valve of a heat pump unit is changed to realize heating in winter and cooling in summer. The utility model needs to be arranged in the tunnel construction stage, has higher construction and installation requirements, is difficult to maintain, and is not suitable for small-scale reconstruction of an operated line.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the background technology and provides a waste heat recovery device for a tunnel top air duct of a subway station, which has the characteristics of good heat extraction effect and low energy consumption.

The technical scheme of the utility model is as follows:

the utility model provides a waste heat recovery device that is used for subway station tunnel rail top wind channel which characterized in that: the device comprises an air port panel provided with a plurality of first air grooves and second air grooves, a waste heat recovery structure arranged above the air port panel, an adjusting mechanism used for lifting the waste heat recovery structure, and a recovery pipeline connecting the waste heat recovery structure and an external heat pump system; the waste heat recovery structure comprises a plurality of heat exchange units which are connected into a whole through a support, the heat exchange units are rotatably positioned on the air port panel, a heat exchange tube is arranged in each heat exchange unit, and the heat exchange tubes of all the heat exchange units are communicated with a recovery pipeline; the first air groove is arranged below the heat exchange unit, the heat exchange unit blocks the first air groove when the waste heat recovery structure descends, and the first air groove is opened when the waste heat recovery structure ascends.

The heat exchange unit comprises a shell provided with a through hole and a heat exchange tube fixed in the shell.

The recovery pipeline comprises a water inlet pipe and a water outlet pipe, and the heat exchange pipes of all the heat exchange units are connected between the water inlet pipe and the water outlet pipe in parallel.

The support comprises a support shaft, a connecting piece for connecting the support shaft with the shells of all the heat exchange units, and a connecting frame fixed with all the heat exchange units.

The support shaft and the connecting piece are of hollow structures, the water inlet pipe and the water outlet pipe extend into the inner cavity of the support shaft, and the two ends of the heat exchange pipe are respectively communicated with the water inlet pipe and the water outlet pipe through butt joint pipes.

The heat exchange tube, the water inlet tube, the water outlet tube and the butt joint tube are flexible tubes; the heat exchange tube is a thin-wall capillary tube.

The first air grooves and the second air grooves are arranged in parallel and are arranged at intervals, and the length of the second air grooves is larger than that of the first air grooves.

The adjusting mechanism comprises a sliding rail fixed with the connecting frame, an electric push rod fixed with the air port panel, and a sliding block which is rotatably positioned at the top end of a telescopic rod of the electric push rod and is slidably positioned on the sliding rail.

The utility model has the beneficial effects that:

the utility model provides a waste heat recovery device for a tunnel top air channel of a subway station tunnel, which can effectively mine and utilize a waste heat air source in the tunnel top air channel of the station tunnel, improve the heat extraction effect and the heat energy recovery utilization rate of the top of the station tunnel, can be used as a new choice of a front-end heat energy acquisition device of a deployed station heat recovery system, assist in realizing energy conservation and emission reduction of the station, and simultaneously can adjust the exhaust volume of smoke and air to deal with emergency situations such as fire and the like of the station tunnel.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the second embodiment of the present invention.

Fig. 3 is a schematic front view of the present invention.

Fig. 4 is a schematic top view of the present invention.

Fig. 5 is a schematic top view of the tuyere panel of the present invention.

Fig. 6 is a schematic perspective view of the exhaust heat recovery structure of the present invention.

Fig. 7 is a schematic perspective view of a heat exchange unit of the present invention.

Fig. 8 is a perspective view of the heat exchange tube of the present invention.

Fig. 9 is a perspective view of the housing of the present invention.

Fig. 10 is a schematic perspective view of the adjusting mechanism of the present invention.

FIG. 11 is a schematic view showing the connection of the recovery line according to the present invention.

Fig. 12 is a schematic view of a station heat recovery system.

Fig. 13 is a third perspective view of the present invention (emergency situation).

FIG. 14 is a schematic diagram of the first embodiment.

FIG. 15 is a schematic view of the second embodiment.

Detailed Description

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

As shown in fig. 1, a waste heat recovery device for a tunnel top air duct of a subway station comprises an air port panel 1, a waste heat recovery structure, an adjusting mechanism and a recovery pipeline.

The air port panel is fixed at the air channel air port position of the subway station tunnel rail top, the rail top exhaust duct is arranged above the air port panel, the train channel is arranged below the air port panel, the waste heat recovery structure is arranged at the top of the air port panel (located in the rail top exhaust duct), the recovery pipeline is connected with the waste heat recovery structure and an external heat pump system, and the adjusting mechanism is used for lifting the waste heat recovery structure to deal with emergency conditions such as fire.

The air port panel is provided with air grooves for communicating the upper rail top exhaust duct with the lower train passage, the air grooves comprise a plurality of first air grooves 1.1 and a plurality of second air grooves 1.2, the first air grooves and the second air grooves are arranged in parallel and are arranged at intervals, the length of each second air groove is greater than that of each first air groove, and the first air grooves and the second air grooves are parallel to the rails.

The tuyere panel is made of a refractory material, such as a galvanized steel plate or a stainless steel plate. The bottom of wind gap panel still sets up a plurality of fixed angle steel 1.4, easily passes through fasteners such as bolt with the civil engineering structure in subway station tunnel rail top wind channel wind gap and fixes, makes things convenient for device's integral erection and maintenance to dismantle.

When the normal heat extraction in station tunnel, only use the second wind groove to ventilate, appear emergent circumstances such as conflagration in station tunnel, first wind groove is also opened simultaneously, has increased the volume of discharging fume of airing exhaust.

The waste heat recovery structure comprises a plurality of heat exchange units 2 and a support, all the heat exchange units are connected into a whole through the support, and the heat exchange units are also rotatably positioned on the air port panel through the support.

The heat exchange unit comprises a housing 2.1 and heat exchange tubes 2.2 arranged in the housing. The shell is the rectangle box body that the perpendicular to wind gap panel was arranged, and the shell all has a plurality of through-holes 2.2 all to make all around and the top surface (guarantee inside heat exchange tube and the abundant contact realization heat transfer of used heat wind source), and the heat exchange tube is two snakelike heat exchange coil of establishing ties, is equipped with the import 2.4 and the export 2.5 with the heat exchange tube both ends intercommunication on the shell, and each heat exchange unit's heat exchange tube all communicates the recovery pipeline. The length direction (vertical direction in figure 5) of the heat exchange units is parallel to the rail, the heat exchange units are arranged in parallel, a certain distance is kept between every two adjacent heat exchange units to form an airflow channel, the second air duct is positioned below the airflow channel, each heat exchange unit is arranged on the first air duct, and the number of the heat exchange units is matched with that of the first air ducts.

The shell can be made of PP materials, PVC materials and PVDF materials, and is easy to customize and process. The heat exchange tube can be made into a thin-wall capillary tube by adopting PTFE (polytetrafluoroethylene) materials, PFA (Polytetrafluoroethylene) materials and FEP (fluorinated ethylene propylene) materials, and has the characteristics of high heat exchange efficiency, small hydraulic loss, high temperature and high pressure resistance and corrosion resistance. The heat exchange tube is fixed to the housing by a rolled strip (not shown).

The support comprises a support shaft 3, a connecting piece 4 and a connecting frame 5. The supporting shaft is horizontally arranged and perpendicular to a rail, the supporting shaft can be rotatably positioned on the air port panel around a horizontal axis through a bearing 9, the supporting shaft and the shells of the heat exchange units are respectively fixed through a plurality of connecting pieces, and the connecting frame is fixed with the shells of all the heat exchange units and all the connecting pieces. The supporting shaft and the connecting piece are both of hollow structures, and the inner cavity of the supporting shaft is communicated with the inner cavity of the connecting piece. The connector encloses the inlet and outlet of the housing.

The recovery pipeline comprises a water inlet pipe 11, a water outlet pipe 12 and a butt joint pipe 13. The water inlet pipe and the water outlet pipe extend into the inner cavity of the supporting shaft from the outside, and the butt joint pipe is arranged in the inner cavity of the connecting piece. The heat exchange tubes of the heat exchange units are connected in parallel, two butt-joint tubes are arranged in each connecting piece, one end of one butt-joint tube penetrates through the tube wall of the supporting shaft and then is communicated with the water inlet tube, the other end of the butt-joint tube is communicated with the inlet of the heat exchange tube, one end of the other butt-joint tube penetrates through the tube wall of the supporting shaft and then is communicated with the water outlet tube, and the other end of the other butt-joint tube is communicated with the outlet of the heat exchange tube. The water inlet pipe and the water outlet pipe are also arranged in the protective sleeve 14 at the same time. The water inlet pipe, the water outlet pipe and the butt joint pipe are all flexible pipes.

The adjusting mechanism comprises a slide rail 6, an electric push rod 7 and a slide block 8. As shown in fig. 3, the electric push rod is fixed on the right side of the bottom surface of the tuyere panel, and the telescopic rod of the electric push rod vertically penetrates through the push rod hole 1.3 of the tuyere panel upwards. The electric push rod adopts an industrial miniature electric direct-current telescopic push rod, 12V/24V/36V direct current can be selected for power supply, and the stroke of the electric push rod is selected according to the overall specification of the waste heat recovery device. The slide rail is fixed with the connecting frame and is perpendicular to the supporting shaft. The sliding block is rotatably positioned at the top end of a telescopic rod of the electric push rod, the rotating axis of the sliding block is parallel to the supporting shaft, and the sliding block is also slidably positioned on the sliding rail. The outside of electric putter is equipped with protective housing 7.1, and the protective housing adopts refractory material to make, for example galvanized steel sheet or stainless steel sheet. The electric push rod is electrically connected with an emergency signal of a station tunnel, so that start and stop control is realized.

During normal conditions, the adjusting mechanism is not started, the heat exchange unit keeps a zero position, the bottom of the shell of the heat exchange unit blocks the first air groove, and the waste heat air source only upwards enters the rail top exhaust duct through the second air groove to exchange heat. During the emergency situation, adjustment mechanism starts, and electric putter's telescopic link upwards stretches out heat transfer unit jack-up take the altitude, and heat transfer unit is the tilt state, and first wind groove is opened, because two wind grooves open simultaneously therefore increased the volume of discharging fume of airing exhaust. After the emergency situation is finished, the adjusting mechanism is started, the telescopic rod of the electric push rod vertically descends to restore the zero position of the heat exchange unit, and the overall structure resets.

As shown in fig. 11, the station heat recovery system includes a cold and heat source, a heat pump system, and a station internal energy supply system. The cold and heat sources comprise a rail top air duct waste heat air source, a tunnel waste heat air source, a station large-scale equipment machine heat source, a soil heat source and the like. The heat pump system comprises key components such as an evaporator, a compressor, a condenser, an expansion valve and the like, and can convert low-temperature heat energy into high-temperature heat energy. The energy supply system inside the station mainly provides heat energy for the heating in the station area and the domestic hot water in the station.

The utility model is used as a front-end heat energy collecting device, a waste heat wind source collected around a rail top air channel is used as a heat source, heat exchange is carried out between a circulating cold water source and air channel waste heat, heat in a water channel circulation is absorbed into a refrigerant through evaporation of the refrigerant in a heat pump unit in a heat pump system, and heat carried by the refrigerant is absorbed by air/water circulation to supply heat through condensation of the refrigerant while the refrigerant is circulating.

It should be noted that the heat source collected by the present invention is only one of the heat sources in the station heat recovery system and is a single heat supply loop, and other collected cold and heat sources can be added with components such as a four-way valve and the like in the heat pump system according to specific needs to form a reversible circulation loop, so as to realize energy supply for cooling in summer and heating in winter in the station.

Fig. 14 and 15 are views showing an embodiment in which the waste heat recovery apparatus is installed in a tunnel overhead air duct of a subway station.

Fig. 14 shows a normal condition, in which the heat exchange unit is maintained at a zero position, the first air duct is closed, the second air duct is opened, and the circulating cooling water exchanges heat with the waste heat air source of the rail top air duct and then is connected to the heat pump system of the station heat recovery system through the recovery pipeline to recycle heat.

Fig. 15 is emergent condition, and adjustment mechanism's power supply line is through inserting station tunnel supply box, station tunnel's emergent signal coordinated control adjustment mechanism's start, and the ascending lifting of heat transfer unit, first wind groove and second wind groove are opened simultaneously and are increaseed two of discharging fume of airing exhaust. After the emergency situation is finished, the adjusting mechanism drives the heat exchange unit to reset, and normal heat extraction recycling is carried out.

It is worth explaining that the installation and the use of the contact net bracket on the outer side of the rail top air duct cannot be influenced by the installation of the utility model, and the installation can be customized on an operated line according to the size of the air port of the rail top air duct of the station tunnel.

Claims (8)

1. The utility model provides a waste heat recovery device that is used for subway station tunnel rail top wind channel which characterized in that: the device comprises a plurality of air port panels (1) of a first air channel (1.1) and a second air channel (1.2), a waste heat recovery structure arranged above the air port panels, an adjusting mechanism used for lifting the waste heat recovery structure, and a recovery pipeline connecting the waste heat recovery structure and an external heat pump system; the waste heat recovery structure comprises a plurality of heat exchange units (2) which are connected into a whole through a support, the heat exchange units are rotatably positioned on the air port panel, a heat exchange tube is arranged in each heat exchange unit, and the heat exchange tubes of all the heat exchange units are communicated with a recovery pipeline; the first air groove is arranged below the heat exchange unit, the heat exchange unit blocks the first air groove when the waste heat recovery structure descends, and the first air groove is opened when the waste heat recovery structure ascends.

2. The waste heat recovery device for the tunnel overhead air duct of the subway station as claimed in claim 1, wherein: the heat exchange unit comprises a shell (2.1) provided with a through hole and a heat exchange pipe (2.2) fixed in the shell.

3. The waste heat recovery device for the tunnel top air duct of the subway station as claimed in claim 2, wherein: the recycling pipeline comprises a water inlet pipe (11) and a water outlet pipe (12), and the heat exchange pipes of all the heat exchange units are connected between the water inlet pipe and the water outlet pipe in parallel.

4. The waste heat recovery device for the tunnel overhead air duct of the subway station as claimed in claim 3, wherein: the support comprises a support shaft (3), a connecting piece (4) for connecting the support shaft with the shells of all the heat exchange units, and a connecting frame (5) fixed with all the heat exchange units.

5. The waste heat recovery device for the tunnel overhead air duct of the subway station as claimed in claim 4, wherein: the support shaft and the connecting piece are of hollow structures, the water inlet pipe and the water outlet pipe extend into the inner cavity of the support shaft, and the two ends of the heat exchange pipe are respectively communicated with the water inlet pipe and the water outlet pipe through butt joint pipes (13).

6. The waste heat recovery device for the tunnel top air duct of the subway station as claimed in claim 5, wherein: the heat exchange tube, the water inlet tube, the water outlet tube and the butt joint tube are flexible tubes; the heat exchange tube is a thin-wall capillary tube.

7. The waste heat recovery device for the tunnel overhead air duct of the subway station as claimed in claim 6, wherein: the first air grooves and the second air grooves are arranged in parallel and are arranged at intervals, and the length of the second air grooves is larger than that of the first air grooves.

8. The waste heat recovery device for the tunnel top air duct of the subway station as claimed in claim 7, wherein: the adjusting mechanism comprises a sliding rail (6) fixed with the connecting frame, an electric push rod (7) fixed with the air port panel, and a sliding block (8) which is rotatably positioned at the top end of a telescopic rod of the electric push rod and is slidably positioned on the sliding rail.

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