CN108842860B - Solar auxiliary power supply network anti-freezing system and three-cavity special-shaped pipe thereof - Google Patents
Solar auxiliary power supply network anti-freezing system and three-cavity special-shaped pipe thereof Download PDFInfo
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- CN108842860B CN108842860B CN201810774987.0A CN201810774987A CN108842860B CN 108842860 B CN108842860 B CN 108842860B CN 201810774987 A CN201810774987 A CN 201810774987A CN 108842860 B CN108842860 B CN 108842860B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/09—Component parts or accessories
- E03B7/10—Devices preventing bursting of pipes by freezing
- E03B7/12—Devices preventing bursting of pipes by freezing by preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
- F16L9/19—Multi-channel pipes or pipe assemblies
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Abstract
The invention relates to an antifreezing facility of a highway tunnel fire water supply network, in particular to a solar auxiliary power supply network antifreezing system and a three-cavity special pipe thereof. The invention solves the problems of large occupied space, low heat exchange efficiency, large later maintenance difficulty and high power consumption of the fire-fighting water supply pipe and anti-freezing facility of the highway tunnel in the cold area. The solar auxiliary power supply network antifreezing system comprises a small special water tank, a water supply tank, a first dual-power supply change-over switch, a second dual-power supply change-over switch, a mains supply, a variable-voltage rectifier, a first temperature sensor, a first temperature controller, a solar photovoltaic power generation device, a three-cavity special pipe, a circulating water pump, a second temperature sensor and a second temperature controller; the three-cavity special-shaped pipe is formed by connecting a plurality of sections of pipe fittings; each pipe fitting comprises a pipe body and an arc-shaped slat; the tube cavity of the tube body is used as a main cavity, and the side wall of the tube body is inwards recessed to form two symmetrical axial grooves; the arc-shaped slat is buckled on the notch of the groove to form an auxiliary cavity. The heat supply anti-freezing device is suitable for heat supply and anti-freezing of fire water supply pipes.
Description
Technical Field
The invention relates to an antifreezing facility of a highway tunnel fire water supply network, in particular to a solar auxiliary power supply network antifreezing system and a three-cavity special pipe thereof.
Background
In order to ensure that the fire water supply pipeline and the fire water pond are not affected by freeze injury in cold areas, a reservoir is usually arranged below a frozen soil layer to prevent freezing; the antifreezing of the water supply pipe connected between the reservoir and the hydrant box adopts two technical schemes, namely, the antifreezing of the main pipe is realized by arranging pipelines filled with media such as steam or hot water outside the water supply pipe in parallel, and the method not only occupies large space, has low heat exchange efficiency, but also has large workload required by later maintenance; secondly, the electric tracing is wound outside the water supply pipe, the heat insulation material is wrapped, and the temperature outside the pipeline is controlled through the high-precision temperature sensor and the temperature controller, so that the antifreezing is realized.
In order to solve the problems of large occupied space, low heat exchange efficiency, large later maintenance difficulty and high power consumption of fire-fighting water supply pipe freezing facilities of highway tunnels in cold areas, the design of the freezing prevention system with reasonable structure and energy saving effect is necessary.
Disclosure of Invention
The invention provides a solar auxiliary power supply network anti-freezing system and a three-cavity special pipe for the system, which are used for solving the problems of large occupied space, low heat exchange efficiency, large later maintenance difficulty and high power consumption of fire water supply pipe anti-freezing facilities of highway tunnels in cold regions.
The solar auxiliary power supply network antifreezing system is realized by adopting the following technical scheme:
a solar auxiliary power supply network anti-freezing system comprises a small special water tank, a water supply tank, a first dual-power supply change-over switch, a second dual-power supply change-over switch, mains supply, a variable-voltage rectifier, a first temperature sensor, a first temperature controller, a solar photovoltaic power generation device, a three-cavity special pipe, a circulating water pump, a second temperature sensor and a second temperature controller;
a high-power electric heating pipe and a low-power electric heating pipe are arranged in the small special water tank; the switching output end of the first dual-power supply switching switch is connected with the mains supply, the main loop terminal of the first dual-power supply switching switch is connected with the input end of the high-power electric heating tube, and the standby loop terminal of the first dual-power supply switching switch is connected with the input end of the transformer rectifier; the standby loop terminal of the second dual-power change-over switch is connected with the output end of the transformation rectifier, the main loop terminal is connected with the output end of the solar photovoltaic power generation device, and the change-over output end of the switch is connected with the input end of the low-power electric heating tube; the first temperature sensor is arranged on the outer side wall of the small special water tank, and the output end of the first temperature sensor is connected with the input end of the first temperature controller; the output end of the first temperature controller is connected with the control end of the first dual-power supply change-over switch;
the three-cavity special-shaped pipe comprises three independent and parallel cavities, and the three cavities are a main cavity and two auxiliary cavities respectively; the main cavity communicates the water supply tank with the hydrant box; the auxiliary cavities are symmetrically distributed on two sides of the main cavity, the auxiliary cavity on one side of the main cavity is a water supply cavity, and the auxiliary cavity on the other side of the main cavity is a water return cavity; the head end of the water supply cavity is communicated with the water outlet of the small special water tank through a pipeline, and the tail end of the water supply cavity is communicated with the inlet of the circulating water pump through a pipeline; the head end of the water return cavity is communicated with the outlet of the circulating water pump through a pipeline, and the tail end of the water return cavity is communicated with the water inlet of the small special water tank through a pipeline; the second temperature sensor is arranged on the outer side wall of the main cavity, and the output end of the second temperature sensor is connected with the input end of the second temperature controller; the output end of the second temperature controller is connected with the control end of the circulating water pump.
Working principle:
the solar auxiliary power supply network anti-freezing system works independently of the main cavity water fire-fighting system.
Water quantity of small-sized special water tank: the small special water tank provides circulating hot water for the water supply cavity and the water return cavity, and the capacity of the water tank is larger than the sum of the minimum water quantity required by the operation of the electric heating device and the water quantity required by the water supply cavity and the water return cavity.
The system is divided into a first heating working condition and a circulating working condition. When the water tank is heated for the first time, the water in the small special water tank is heated by alternating current 380V commercial power and a high-power electric heating pipe so as to save waiting time before the system is put into operation; under the circulation working condition, when the water temperature in the small special water tank is higher, for example, the water temperature t is more than or equal to 5 ℃, the first temperature controller enables a main loop switch (three phases) of the first dual-power switching switch to be disconnected, namely, the high-power electric heating pipe is in a power-off state, meanwhile, a standby loop switch of the first dual-power switching switch is closed, namely, a transformer rectifier has direct-current voltage output, the transformer rectifier and the solar photovoltaic power generation device form two mutually standby power supplies of the second dual-power switching switch, the main loop switch of the second dual-power switching switch is set to be in a normally-closed state, the standby loop switch is set to be in a normally-open state, and when the main loop is in power failure, the main loop switch is disconnected and the standby loop switch is automatically switched to be in a closed state. There are two cases corresponding to the above working process: if the weather is fine or the solar photovoltaic power generation device is in a good working state, the solar photovoltaic power generation device normally outputs voltage to supply power for the low-power electric heating pipe; if the solar photovoltaic power generation device is in a fault state in rainy days, the output voltage of the solar photovoltaic power generation device is zero, the main loop is in power failure, the standby loop switch is automatically switched to a closed state, and the commercial power supplies power to the low-power electric heating pipe through the voltage transformation rectifier.
When the water temperature in the small-sized special water tank is lower, for example, the water temperature t is lower than 5 ℃, the heat of the small-sized electric heating pipe is regarded as insufficient to meet the anti-freezing requirement of the water in the small-sized water tank, the first temperature controller enables the main loop switch (three phases) of the first double-power switch to be closed, namely, the large-sized electric heating pipe is in a power supply state, the voltage transformation rectifier is in a stop working state, and at the moment, no matter whether the solar photovoltaic power generation device can normally output voltage, namely, whether the small-sized electric heating pipe is in a heating state or not, the large-sized electric heating pipe must be put into operation and is in the heating state until the water temperature t is more than or equal to 5 ℃.
The circulating water pump is preferably arranged near the lowest water level of the system. The hot water medium enters the water supply cavity by virtue of the pressure formed by high potential energy, and the water after heat exchange is returned into the small special water tank through the water return cavity by the circulating water pump and is heated again; because the hot water medium in the water supply cavity and the water return cavity is only used for heat exchange, the flow velocity in the pipe is not required to be very high, and the energy conservation is facilitated.
The circulating water pump is operated and stopped by the second temperature controller, when the second temperature sensor detects that the temperature of the outer side wall of the main cavity of the three-cavity special-shaped pipe is higher than the set temperature (for example, the water temperature t is more than or equal to 10 ℃ and can be determined according to actual projects), the water temperature in the main cavity is considered to be high enough at the moment, the circulating water pump can be stopped, and the second temperature controller controls the circulating water pump to stop working; and when the water temperature t is less than 10 ℃, the second temperature controller controls the circulating water pump to recover to a normal working state.
An overhaul switch is arranged between the mains supply and the switching output end of the first dual-power supply switching switch, so that the first dual-power supply switching switch is convenient to overhaul.
The system is used for connecting the water supply cavity with the circulating water pump, and a gate valve is arranged on a pipeline of the small special water tank; and a check valve is arranged on a pipeline for connecting the water return cavity with the circulating water pump and the small special water tank, so that the normal operation, overhaul and maintenance of the water system are facilitated. When the working condition is first heating, the gate valve can be closed first, and the gate valve is opened after circulating water is heated in the small-sized special water tank.
The outer side walls of the small special water tank and the three-cavity special-shaped pipe are covered with heat insulation layers. The loss of heat energy is reduced.
The main circuit of the mains supply and the main circuit of the power supply of the circulating water pump are respectively connected with an intelligent alternating-current voltmeter; an intelligent direct-current voltmeter is respectively connected to an output loop of the transformer rectifier and an output main loop of the solar photovoltaic power generation device; the two intelligent alternating-current voltmeters, the two intelligent direct-current voltmeters, the first temperature controller and the second temperature controller are all connected with the computer through signal transmitters. The management personnel can know the operation condition of the system in time.
The three-cavity special pipe in the solar auxiliary power supply network antifreezing system is realized by adopting the following technical scheme:
a three-cavity special pipe used in an anti-freezing system of a solar auxiliary power supply network is formed by sequentially connecting a plurality of pipe fittings; each pipe fitting comprises a pipe body and an arc-shaped slat; the tube cavity of the tube body is used as a main cavity, and the left side wall and the right side wall of the tube body are respectively recessed inwards to form two symmetrical axial grooves; the number of the arc-shaped strips is two, and the two arc-shaped strips are respectively buckled on the notches of the two axial grooves to form two auxiliary cavities.
The system utilizes the pipe wall shared by the auxiliary cavity and the main cavity to perform heat exchange, increases the heat exchange area, has small heat loss and improves the heat exchange efficiency.
Each section of pipe fitting also comprises a plurality of U-shaped short connecting pipes; the two ends of each auxiliary cavity are respectively covered with an end baffle; two ends of the arc-shaped slat are respectively provided with a connecting hole; the U-shaped connecting short pipe is communicated with the auxiliary cavities of the two adjacent sections of pipe fittings, and the pipe orifice of the U-shaped connecting short pipe is connected with the connecting hole. The auxiliary cavity is connected by the U-shaped connecting short pipe, so that the replacement and the later maintenance are convenient.
The connecting hole is a screw hole, and a threaded joint is connected to the screw hole; the pipe orifice of the U-shaped short connecting pipe is connected with the threaded joint, so that the U-shaped short connecting pipe is convenient to install and replace.
The arc radius of the arc-shaped slat is consistent with that of the pipe body, and the three-cavity special pipe formed by combination maintains the original pipe diameter, so that the installation space is saved, and the pipe can be still connected through a standard universal clamp or flange.
The pipe bodies of the two adjacent sections of pipe fittings are connected through a clamp or a flange, so that replacement and installation are convenient.
The invention has reasonable design, effectively solves the problems of large occupied space, low heat exchange efficiency, large later maintenance difficulty and high power consumption of the fire-fighting water supply pipe freezing prevention facilities of the highway tunnel in the cold area, and is suitable for heat supply freezing prevention of the fire-fighting water supply pipe.
Drawings
Fig. 1 is a solar auxiliary power supply network antifreeze system.
Fig. 2 is a front view of a three-lumen isopipe.
Fig. 3 is a side view of a three-lumen isopipe.
Fig. 4 is a front view of the body of the three-lumen profiled tube.
Fig. 5 is a side view of the body of a three-lumen isopipe.
Fig. 6 is a front view of an arcuate strip of a three-lumen isopipe.
Fig. 7 is a side view of an arcuate strip of a three-lumen isopipe.
Fig. 8 is a front view of the end flap of the three-lumen profiled tube.
Fig. 9 is a side view of the end flap of a three-lumen profiled tube.
Fig. 10 is a front view of the connection hole.
Fig. 11 is a cross-sectional view of the connection hole.
Fig. 12 shows a clip connection of a three-chamber special-shaped tube.
Fig. 13 is a top view of fig. 12.
Fig. 14 shows a flange connection of a three-chamber special-shaped tube.
Fig. 15 is a top view of fig. 14.
In the figure: the intelligent solar energy power generation system comprises a 1-small special water tank, an 11-high-power electric heating pipe, a 12-low-power electric heating pipe, a 2-water supply tank, a 31-first double-power switch, a 32-second double-power switch, 4-mains supply, a 5-variable-voltage rectifier, a 61-first temperature controller, a 62-first temperature sensor, a 63-second temperature controller, a 64-second temperature sensor, a 7-solar photovoltaic power generation device, an 8-three-cavity special pipe, an 81-main cavity, an 82-auxiliary cavity, 821-end baffle plates, 83-arc-shaped strips, 831-connecting holes, an 84-U-shaped connecting short pipe, an 85-clamp, an 86-flange, an 87-gate valve, an 88-check valve, an 89-threaded connector, a 9-fire hydrant box, a 10-circulating water pump, a 13-intelligent alternating-current voltmeter, a 14-intelligent direct-current voltmeter, a 15-signal transmitter, a 16-computer and a 17-single-mode optical cable.
Detailed Description
The detailed description in conjunction with the drawings:
solar auxiliary power supply network anti-freezing system:
the solar auxiliary power supply network antifreezing system comprises a small special water tank 1, a water supply tank 2, a first double-power supply change-over switch 31, a second double-power supply change-over switch 32, a commercial power 4, a voltage transformation rectifier 5, a first temperature sensor 62, a first temperature controller 61, a solar photovoltaic power generation device 7, a three-cavity special pipe 8, a circulating water pump 10, a second temperature sensor 64 and a second temperature controller 63;
a high-power electric heating pipe 11 and a low-power electric heating pipe 12 are arranged in the small special water tank 1; the switching output end of the first dual-power supply switching switch 31 is connected with the commercial power 4, the main loop terminal of the first dual-power supply switching switch is connected with the input end of the high-power electric heating tube 11, and the standby loop terminal of the first dual-power supply switching switch is connected with the input end of the transformer rectifier 5; the standby loop terminal of the second dual-power change-over switch 32 is connected with the output end of the transformation rectifier 5, the main loop terminal is connected with the output end of the solar photovoltaic power generation device 7, and the change-over output end of the switch is connected with the input end of the low-power electric heating tube 12; the first temperature sensor 62 is arranged on the outer side wall of the small-sized special water tank 1, and the output end of the first temperature sensor is connected with the input end of the first temperature controller 61; the output end of the first temperature controller 61 is connected with the control end of the first dual-power change-over switch 31;
the three-cavity special-shaped pipe 8 comprises three independent and parallel cavities, and the three cavities are a main cavity 81 and two auxiliary cavities 82 respectively; the main chamber 81 communicates the water supply tank 2 with the hydrant box 9; the auxiliary cavities 82 are symmetrically distributed on two sides of the main cavity 81, the auxiliary cavity 82 on one side of the main cavity 81 is a water supply cavity, and the auxiliary cavity 82 on the other side of the main cavity 81 is a water return cavity; the head end of the water supply cavity is communicated with the water outlet of the small-sized special water tank 1 through a pipeline, and the tail end of the water supply cavity is communicated with the inlet of the circulating water pump 10 through a pipeline; the head end of the water return cavity is communicated with the outlet of the circulating water pump 10 through a pipeline, and the tail end of the water return cavity is communicated with the water inlet of the small-sized special water tank 1 through a pipeline; the second temperature sensor 64 is arranged on the outer side wall of the main cavity 81, and the output end of the second temperature sensor is connected with the input end of the second temperature controller 63; the output end of the second temperature controller 63 is connected with the control end of the circulating water pump 10.
Further, an overhaul switch is arranged between the commercial power 4 and the switching output end of the first dual-power supply switching switch 31.
Further, gate valves 87 are arranged on the pipelines for connecting the water supply cavity with the circulating water pump 10 and the small-sized special water tank 1; check valves 88 are arranged on the pipelines for connecting the water return cavity with the circulating water pump 10 and the small-sized special water tank 1.
Further, the outer side walls of the small-sized special water tank 1 and the three-cavity special-shaped pipe 8 are covered with heat insulation layers.
Further, an intelligent alternating-current voltmeter 13 is respectively connected to the main circuit of the commercial power 4 and the main circuit of the power supply of the circulating water pump 10; the output loop of the transformation rectifier 5 and the output main loop of the solar photovoltaic power generation device 7 are respectively connected with an intelligent direct current voltmeter 14; the two intelligent alternating-current voltmeters 13, the two intelligent direct-current voltmeters 14, the first temperature controller 61 and the second temperature controller 63 are all connected with the computer 16 through the signal transmitter 15.
Three-cavity special-shaped pipe:
a three-cavity special pipe used in an anti-freezing system of a solar auxiliary power supply network is formed by sequentially connecting a plurality of pipe fittings; each section of pipe comprises a pipe body and an arc-shaped slat 83; the tube cavity of the tube body is used as a main cavity 81, and the left and right side walls of the tube body are respectively recessed inwards to form two symmetrical axial grooves; the number of the arc-shaped strips 83 is two, and the two arc-shaped strips 83 are respectively buckled with the notches of the two axial grooves to form two auxiliary cavities 82.
Further, each length of tubing also includes a plurality of U-shaped junction tubes 84; both ends of each auxiliary cavity 82 are capped with end stop 821; two ends of the arc-shaped slat 83 are respectively provided with a connecting hole 831; the U-shaped short connecting pipe 84 is communicated with the auxiliary cavity 82 of two adjacent sections of pipe fittings, and the pipe orifice of the U-shaped short connecting pipe is connected with the connecting hole 831.
Further, the connecting hole 831 is a screw hole, and a threaded joint 89 is connected to the screw hole; the mouth of the U-shaped junction pipe 84 is connected to a threaded nipple 89.
Further, the arc radius of the arc-shaped slat 83 is consistent with the arc radius of the pipe body.
Further, the pipe bodies of the two adjacent pipe sections are connected through a clamp 85 or a flange 86.
The specific implementation process comprises the following steps:
the selection of the first dual-power change-over switch 31 needs to ensure that the high-power heating wire 11 and the transformation rectifier 5 cannot be connected with the mains supply 4 at the same time; the second dual-power switch 32 needs to ensure that the transformer rectifier 5 and the solar photovoltaic power generation device 7 cannot be connected with the low-power heating wire 12 at the same time.
To ensure the anti-freezing effect, the first temperature sensor 62 and the second temperature sensor 64 are high-precision temperature sensors, and the second temperature sensor 64 may be specifically disposed on the outer side wall of the end of the main cavity 81.
The three-chamber special-shaped tube 8 is made of metal material, and can be steel.
The pipeline connected with the hydrant box 9 can also adopt a three-cavity special-shaped pipe 8 with small caliber, so that the connecting pipeline is prevented from being frozen.
The two intelligent alternating-current voltmeters 13 and the two intelligent direct-current voltmeters 14 are connected into a circuit through a mutual inductor.
The signal connection uses a single-mode optical cable 17.
Claims (9)
1. A solar auxiliary power supply network anti-freezing system is characterized in that: the solar energy power generation device comprises a small special water tank (1), a water supply tank (2), a first double-power supply change-over switch (31), a second double-power supply change-over switch (32), a mains supply (4), a variable-voltage rectifier (5), a first temperature sensor (62), a first temperature controller (61), a solar energy photovoltaic power generation device (7), a three-cavity special pipe (8), a circulating water pump (10), a second temperature sensor (64) and a second temperature controller (63);
a high-power electric heating pipe (11) and a low-power electric heating pipe (12) are arranged in the small special water tank (1); the switching output end of the first dual-power supply switching switch (31) is connected with the mains supply (4), the main loop terminal of the first dual-power supply switching switch is connected with the input end of the high-power electric heating tube (11), and the standby loop terminal of the first dual-power supply switching switch is connected with the input end of the voltage transformation rectifier (5); the standby loop terminal of the second dual-power change-over switch (32) is connected with the output end of the transformation rectifier (5), the main loop terminal is connected with the output end of the solar photovoltaic power generation device (7), and the change-over output end of the switch is connected with the input end of the low-power electric heating tube (12); the first temperature sensor (62) is arranged on the outer side wall of the small special water tank (1), and the output end of the first temperature sensor is connected with the input end of the first temperature controller (61); the output end of the first temperature controller (61) is simultaneously connected with the control end of the first dual-power supply change-over switch (31);
the three-cavity special pipe (8) comprises three independent and parallel cavities, and the three cavities are a main cavity (81) and two auxiliary cavities (82) respectively; the main cavity (81) is used for communicating the water supply tank (2) with the hydrant box (9); the auxiliary cavities (82) are symmetrically distributed on two sides of the main cavity (81), the auxiliary cavity (82) positioned on one side of the main cavity (81) is a water supply cavity, and the auxiliary cavity (82) positioned on the other side of the main cavity (81) is a water return cavity; the head end of the water supply cavity is communicated with the water outlet of the small special water tank (1) through a pipeline, and the tail end of the water supply cavity is communicated with the inlet of the circulating water pump (10) through a pipeline; the head end of the water return cavity is communicated with the outlet of the circulating water pump (10) through a pipeline, and the tail end of the water return cavity is communicated with the water inlet of the small-sized special water tank (1) through a pipeline; the second temperature sensor (64) is arranged on the outer side wall of the main cavity (81), and the output end of the second temperature sensor is connected with the input end of the second temperature controller (63); the output end of the second temperature controller (63) is connected with the control end of the circulating water pump (10);
the three-cavity special-shaped pipe (8) is formed by sequentially connecting a plurality of sections of pipe fittings; each pipe section comprises a pipe body and an arc-shaped slat (83); the tube cavity of the tube body is used as a main cavity (81), and the left side wall and the right side wall of the tube body are respectively recessed inwards to form two symmetrical axial grooves; the number of the arc-shaped strips (83) is two, and the two arc-shaped strips (83) are respectively buckled on the notches of the two axial grooves to form two auxiliary cavities (82).
2. The solar-assisted power supply network antifreeze system according to claim 1, wherein: an overhaul switch is arranged between the mains supply (4) and the switching output end of the first dual-power supply switching switch (31).
3. The solar-assisted power supply network antifreeze system according to claim 2, wherein: gate valves (87) are arranged on pipelines for connecting the water supply cavity with the circulating water pump (10) and the small-sized special water tank (1); and check valves (88) are arranged on pipelines for connecting the water return cavity with the circulating water pump (10) and the small-sized special water tank (1).
4. The solar-assisted power supply network antifreeze system according to claim 1, 2 or 3, wherein: the outer side walls of the small special water tank (1) and the three-cavity special-shaped pipe (8) are covered with heat insulation layers.
5. The solar-assisted power supply network antifreeze system of claim 4, wherein: the main circuit of the mains supply (4) and the main circuit of the power supply of the circulating water pump (10) are respectively connected with an intelligent alternating-current voltmeter (13); an intelligent direct-current voltmeter (14) is respectively connected into an output loop of the voltage transformation rectifier (5) and an output main loop of the solar photovoltaic power generation device (7); the two intelligent alternating-current voltmeters (13), the two intelligent direct-current voltmeters (14), the first temperature controller (61) and the second temperature controller (63) are all connected with the computer (16) through the signal transmitter (15).
6. The solar-assisted power supply network antifreeze system according to claim 1, wherein: each section of pipe also comprises a plurality of U-shaped short connecting pipes (84); both ends of each auxiliary cavity (82) are covered with end blocking pieces (821); two ends of the arc-shaped slat (83) are respectively provided with a connecting hole (831); the U-shaped short connecting pipe (84) is communicated with the auxiliary cavity (82) of the two adjacent sections of pipe fittings, and the pipe orifice of the U-shaped short connecting pipe is connected with the connecting hole (831).
7. The solar-assisted power supply network antifreeze system of claim 6, wherein: the connecting hole (831) is a screw hole, and a threaded joint (89) is connected to the screw hole; the mouth of the U-shaped junction pipe (84) is connected with a threaded joint (89).
8. The solar-assisted power supply network antifreeze system of claim 6, wherein: the arc radius of the arc-shaped slat (83) is consistent with the arc radius of the pipe body.
9. The solar-assisted power supply network antifreeze system of claim 6, wherein: the pipe bodies of the two adjacent sections of pipe fittings are connected through a clamp (85) or a flange (86).
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| CN201810774987.0A CN108842860B (en) | 2018-07-16 | 2018-07-16 | Solar auxiliary power supply network anti-freezing system and three-cavity special-shaped pipe thereof |
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| CN201810774987.0A CN108842860B (en) | 2018-07-16 | 2018-07-16 | Solar auxiliary power supply network anti-freezing system and three-cavity special-shaped pipe thereof |
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| CN108842860B true CN108842860B (en) | 2023-06-02 |
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| KR101811240B1 (en) * | 2017-06-01 | 2017-12-20 | 주식회사 디에이치기술단 | Power supply system of anti-freezing device for fire-fighting water supply pipe |
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| CN108842860A (en) | 2018-11-20 |
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