CN219367754U - Closed domestic hot water system - Google Patents
Closed domestic hot water system Download PDFInfo
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- CN219367754U CN219367754U CN202223430496.5U CN202223430496U CN219367754U CN 219367754 U CN219367754 U CN 219367754U CN 202223430496 U CN202223430496 U CN 202223430496U CN 219367754 U CN219367754 U CN 219367754U
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Abstract
The utility model provides a closed domestic hot water system, which comprises a main pipeline part and a plurality of unit type hot water circulating systems; the unit type hot water circulating system comprises a pipeline circulating pump, a unit type water supply pipeline and a unit type water return pipeline; the main pipeline part comprises a pressure-bearing water tank, a boiler hot water pipe and a constant pressure tank; a backwater main pipe and a water supply main pipe; each unit type water supply pipeline is connected with a water supply main pipe; the unit type water return pipeline is connected with the water return main pipe; the upper end of the pressure-bearing water tank is connected with a boiler hot water pipe, and two sides of the lower end of the pressure-bearing water tank are respectively connected with a backwater main pipe and a water supply main pipe; wherein one end of the water supply main pipe is sequentially connected with a first branch pipe and a second branch pipe; the second branch pipe is connected with the constant pressure tank; the first branch pipe is connected with the water supplementing device; the unit type water supply pipeline and the unit type water return pipeline are connected through a pipeline circulating pump; wherein each unit type water supply pipeline is provided with a temperature sensor. The system is not provided with a main circulating pump so as to reduce redundant circulating quantity, and each unit is provided with a circulating pump, so that the problem of unbalanced water quantity possibly caused by the arrangement of the main circulating pump is avoided.
Description
Technical Field
The utility model relates to the field of centralized water supply, in particular to a closed domestic hot water system.
Background
The operation mode of the concentrated domestic hot water supply system is to circulate the water of the whole system by adopting a main pipeline pump, wherein the main pipeline between a heat source end and a domestic hot water end of a plurality of projects reaches hundreds of meters, and the lengths of the main pipeline and the domestic hot water end are even thousands of meters, so that the heat loss in the middle is huge; the traditional centralized domestic hot water supply drives the whole system water to run by the main pipeline pump, so that a great amount of heat is lost in the backwater main pipeline by unused high-temperature hot water, and the hydraulic balance among all buildings at the tail end is difficult to ensure due to the circulation of the main pipeline pump, so that uneven cooling and heating can be caused even if some buildings do not have hot water, and the normal use of a hot water system and the energy-saving running of the hot water system are not facilitated.
Disclosure of Invention
In order to solve the problems, the utility model discloses a closed domestic hot water system, which is not provided with a main pipe circulating pump so as to reduce redundant circulating quantity, and each unit is provided with a circulating pump so as to avoid the problem of unbalanced water quantity possibly caused by the arrangement of the main circulating pump.
A closed domestic hot water system comprises a main pipeline part and a plurality of unit type hot water circulating systems; the unit type hot water circulating system comprises a pipeline circulating pump, a unit type water supply pipeline and a unit type water return pipeline; the main pipeline part comprises a pressure-bearing water tank, a boiler hot water pipe and a constant pressure tank; a backwater main pipe and a water supply main pipe; each unit type water supply pipeline is connected with a water supply main pipe; the unit type water return pipeline is connected with the water return main pipe; the upper end of the pressure-bearing water tank is connected with a boiler hot water pipe, and two sides of the lower end of the pressure-bearing water tank are respectively connected with a backwater main pipe and a water supply main pipe; wherein one end of the water supply main pipe is sequentially connected with a first branch pipe and a second branch pipe; the second branch pipe is connected with the constant pressure tank; the first branch pipe is connected with the water supplementing device; the unit type water supply pipeline and the unit type water return pipeline are connected through a pipeline circulating pump; wherein each unit type water supply pipeline is provided with a temperature sensor.
Further, the water replenishing device comprises a water replenishing pipe, and a filter, a thermometer, a pressure gauge, a flowmeter, a backflow preventer and a butterfly valve which are sequentially arranged on the water replenishing pipe; the water supplementing pipe is connected with tap water for supplementing water; the filter removes impurities of tap water, a thermometer, a pressure gauge and a flowmeter, and the water supplementing condition is observed in real time.
Further, the temperature controller is electrically connected with the temperature sensor and the pipeline circulating pump respectively.
Further, an exhaust valve is arranged on the unit type water supply pipeline; because a certain amount of air is usually dissolved in the water; in this way, the gas is gradually separated from the water in the circulating process and gradually gathered together to form large bubbles or even gas columns, and the gas is often generated because of the replenishment of the water; venting by means of a vent valve is required.
The working principle of the utility model is as follows:
1. in the initial operation stage, the hot water source end supplies water to each unit through the main pipeline, the system water pressure and the temperature reach the high pressure value and the high temperature value set by the pressure-bearing water tank, the water supply to the units is stopped, the system water pressure is reduced to the low pressure value and the low temperature value set by the pressure-bearing water tank, and the system water supply is started; the water in the unit system is self-circulated, and the starting and stopping of the unit pipeline circulating pump are controlled according to the water temperature condition; when the water temperature in the unit pipeline is reduced to a set low temperature value, the unit pipeline circulating pump is started, and when the water temperature in the unit pipeline is up to a set high temperature value, the unit pipeline circulating pump is closed.
2. A pipeline circulating pump and a temperature sensor are arranged on each unit vertical pipe; the system is not provided with a main circulating pump so as to reduce redundant circulating quantity, and each unit is provided with a circulating pump, so that the problem of unbalanced water quantity possibly caused by the arrangement of the main circulating pump is avoided.
3. The main water supply pipeline is connected with a water supplementing pipeline, and when the pressure of the main water supply pipeline is lower than the system design working pressure value (0.5 MPa), a butterfly valve is opened to supplement water; when the system pressure reaches the system design working pressure (0.5 MPa), the butterfly valve is closed to stop water supplementing.
The utility model has the beneficial effects that: the system does not need to be provided with a main pipeline circulating pump, can reduce redundant circulating quantity, and the unit type circulating system can avoid the problem of water conservancy unbalance generated by the main pipeline pump.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2, a partial enlarged view of a in fig. 1;
fig. 3, a partial enlarged view of B in fig. 1;
list of reference numerals:
1-a pipeline circulating pump; 2-unit type water supply pipe; 3-unit return water pipe; 4-a pressure-bearing water tank; 5-boiler hot water pipe; 6-a constant pressure tank; 7-backwater main pipe; 8-a water supply main pipe; 9-a first branch pipe; 10-a second branch pipe; 11-a temperature sensor; 12-a water supplementing pipe; 13-filter, 14-thermometer, 15-pressure gauge, 16-flow meter; 17-a backflow preventer; 18-a temperature controller; 19-an exhaust valve; 20-butterfly valve.
Detailed Description
The present utility model is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the utility model and not limiting the scope of the utility model. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
As shown in fig. 1 and 3, a closed domestic hot water system of the present embodiment includes a main pipe portion and a plurality of unit-type hot water circulation systems; the unit type hot water circulation system comprises a pipeline circulation pump 1, a unit type water supply pipeline 2 and a unit type water return pipeline 3.
The main pipeline part comprises a pressure-bearing water tank 4, a boiler hot water pipe 5 and a constant pressure tank 6; a backwater main pipe 7 and a water supply main pipe 8; each unit type water supply pipeline 2 is connected with a water supply main pipe 8; the unit type water return pipeline 3 is connected with a water return main pipe 7; the upper end of the pressure-bearing water tank 4 is connected with a boiler hot water pipe 5, and two sides of the lower end are respectively connected with a backwater main pipe 7 and a water supply main pipe 8; wherein one end of the main water supply pipe 8 is sequentially connected with a first branch pipe 9 and a second branch pipe 10; the second branch pipe 10 is connected with the constant pressure tank 6; the first branch pipe 9 is connected with a water supplementing device; the unit type water supply pipeline 2 and the unit type water return pipeline 3 are connected through a pipeline circulating pump 1; wherein each of the unit type water supply pipes 2 is provided with a temperature sensor 11; the temperature controller 18 is respectively and electrically connected with the temperature sensor 11 and the pipeline circulating pump 1; an exhaust valve 19 is arranged on the unit type water supply pipeline 2; the unit type water supply pipeline is connected with the service pipeline.
As shown in fig. 2, the water replenishing device comprises a water replenishing pipe 12, and a filter 13, a thermometer 14, a pressure gauge 15, a flowmeter 16, a backflow preventer 17 and a butterfly valve 20 which are sequentially arranged on the water replenishing pipe 12; and observing the water replenishing condition in real time.
At the initial stage of operation, the hot water source end supplies water to each unit through the main pipeline, the system temperature reaches the high temperature value (50 ℃) set by the pressure-bearing water tank, the water supply to the units is stopped, the system water pressure is reduced to the low temperature value (40 ℃) set by the pressure-bearing water tank, and the system water supply is started; the water in the unit system is self-circulated, and the starting and stopping of the unit pipeline circulating pump are controlled according to the water temperature condition; when the water temperature in the unit pipeline is reduced to a set low temperature value, the unit pipeline circulating pump is started, and when the water temperature in the unit pipeline is up to a set high temperature value, the unit pipeline circulating pump is closed.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
Claims (4)
1. A closed domestic hot water system comprises a main pipeline part and a plurality of unit type hot water circulating systems; the unit type hot water circulating system comprises a pipeline circulating pump (1), a unit type water supply pipeline (2) and a unit type water return pipeline (3); the method is characterized in that: the main pipeline part comprises a pressure-bearing water tank (4), a boiler hot water pipe (5) and a constant pressure tank (6); a backwater main pipe (7) and a water supply main pipe (8); each unit type water supply pipeline (2) is connected with a water supply main pipe (8); the unit type backwater pipeline (3) is connected with a backwater main pipe (7); the upper end of the pressure-bearing water tank (4) is connected with a boiler hot water pipe (5), and two sides of the lower end are respectively connected with a backwater main pipe (7) and a water supply main pipe (8); wherein one end of the main water supply pipe (8) is sequentially connected with a first branch pipe (9) and a second branch pipe (10); the second branch pipe (10) is connected with the constant pressure tank (6); the first branch pipe (9) is connected with the water supplementing device; the unit type water supply pipeline (2) and the unit type water return pipeline (3) are connected through a pipeline circulating pump (1); wherein each unit type water supply pipeline (2) is provided with a temperature sensor (11).
2. A closed domestic hot water system according to claim 1, wherein: the water replenishing device comprises a water replenishing pipe (12), and a filter (13), a thermometer (14), a pressure gauge (15), a flowmeter (16), an anti-backflow device (17) and a butterfly valve (20) which are sequentially arranged on the water replenishing pipe (12).
3. A closed domestic hot water system according to claim 1, wherein: the temperature controller (18) is respectively and electrically connected with the temperature sensor (11) and the pipeline circulating pump (1).
4. A closed domestic hot water system according to claim 1, wherein: an exhaust valve (19) is arranged on the unit type water supply pipeline (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223430496.5U CN219367754U (en) | 2022-12-21 | 2022-12-21 | Closed domestic hot water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223430496.5U CN219367754U (en) | 2022-12-21 | 2022-12-21 | Closed domestic hot water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219367754U true CN219367754U (en) | 2023-07-18 |
Family
ID=87142475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223430496.5U Active CN219367754U (en) | 2022-12-21 | 2022-12-21 | Closed domestic hot water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219367754U (en) |
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2022
- 2022-12-21 CN CN202223430496.5U patent/CN219367754U/en active Active
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