阅读说明：本技术 一种闭式非承压缓冲水罐 (Closed non-pressure-bearing buffering water tank ) 是由 温青梅 苏士强 袁婉丽 李培伦 苏士民 于 2020-08-13 设计创作，主要内容包括：本发明要解决的问题是提供一种闭式非承压缓冲水罐,代替传统的开式缓冲水箱实现补水以及缓冲的作用,隔绝空气实现闭式无氧运行,同时保证应用在太阳能系统避免超压,其包括罐体,所述罐体包括外壳和容纳水的囊体,所述囊体设在所述外壳内,所述外壳上安装有通气管,所述通气管连通所述外壳与囊体的夹层腔；罐体上还设有补水管、太阳能出水管、太阳能进水管、热水供水管和热水回水管,所述补水管、太阳能出水管、太阳能进水管、热水供水管和热水回水管连通所述囊体的内腔。(The invention provides a closed non-pressure-bearing buffer water tank which replaces a traditional open buffer water tank to realize the functions of water supplement and buffer, isolate air to realize closed anaerobic operation and simultaneously ensure that the tank is applied to a solar energy system to avoid overpressure; the tank body is also provided with a water replenishing pipe, a solar water outlet pipe, a solar water inlet pipe, a hot water supply pipe and a hot water return pipe, and the water replenishing pipe, the solar water outlet pipe, the solar water inlet pipe, the hot water supply pipe and the hot water return pipe are communicated with the inner cavity of the bag body.)

1. A closed non-pressure-bearing buffer water tank comprises a tank body and is characterized in that the tank body comprises a shell and a bag body for containing water, the bag body is arranged in the shell, a vent pipe is arranged on the shell, and the vent pipe is communicated with an interlayer cavity of the shell and the bag body;

the tank body is also provided with a water replenishing pipe, a solar water outlet pipe, a solar water inlet pipe, a hot water supply pipe and a hot water return pipe, and the water replenishing pipe, the solar water outlet pipe, the solar water inlet pipe, the hot water supply pipe and the hot water return pipe are communicated with the inner cavity of the bag body.

2. A closed unpressurized buffer water tank as claimed in claim 1, wherein the upper end and the lower end of the housing are respectively provided with a flange joint, and the upper end and the lower end of the bag body are correspondingly and fixedly connected to the two flange joints.

3. A closed unpressurized buffer water tank as claimed in claim 2, wherein the solar water outlet pipe and the hot water return pipe are mounted on a flange joint at the upper end, and the solar water inlet pipe, the hot water supply pipe and the water replenishing pipe are mounted on a flange joint at the lower end.

4. A closed unpressurized buffer water tank as claimed in claim 3, wherein branch pipes are arranged on the solar water outlet pipe and the hot water return pipe, and automatic exhaust valves are arranged on the branch pipes.

5. A closed unpressurized buffer water tank as claimed in claim 3, wherein a liquid level sensor and a temperature sensor are arranged in the bag body.

6. A closed unpressurized buffer water tank as claimed in any one of claims 1 to 5, wherein the bladder is made of nitrile rubber, and the shell is made of carbon steel or stainless steel and is plated with an anti-corrosive paint.

Technical Field

The invention belongs to the technical field of solar water heating system equipment, can be applied to the solar water heating or heating industry, and particularly relates to a closed non-pressure-bearing buffer water tank.

Background

The centralized solar water heating system is one of the main forms for solving the problems of residential and public building water, the main composition structure of the system is to use an unpressurized vacuum tube type heat collector as a main heat source, and an open buffer water tank and an auxiliary energy source are configured. The solar heat collector is combined with other auxiliary energy sources through the open buffer water tank, wherein the open buffer water tank is important equipment for heat storage, water supplement, air exhaust and pollution discharge in the system, can balance the flow of the heat collecting side and the heat supplying side, and plays a very important role in the stable operation of the system.

But open buffer tank has a shortcoming, and open buffer tank and atmosphere direct contact to lead to system's equipment and pipeline to be in aerobic condition, long-term operation system pipeline scale deposit, corruption, ageing phenomenon are very outstanding, have seriously influenced the life and the user experience of system. Although most projects are equipped with water softeners, and pipelines and equipment are also adopted for cleaning after the system operates for several years, the cleaning effect is not ideal, many pipelines cause irreversible corrosion, and the later maintenance cost is high.

Disclosure of Invention

The invention aims to solve the problem of providing a closed non-pressure-bearing buffer water tank, which replaces a traditional open buffer water tank to realize the functions of water supplement and buffering, isolates air to realize closed anaerobic operation, and simultaneously ensures that the closed non-pressure-bearing buffer water tank is applied to a solar system to avoid overpressure.

The invention is realized by the following technical scheme:

a closed non-pressure-bearing buffer water tank comprises a tank body, wherein the tank body comprises a shell and a bag body for containing water, the bag body is arranged in the shell, a vent pipe is arranged on the shell, and the vent pipe is communicated with interlayer cavities of the shell and the bag body;

the tank body is also provided with a water replenishing pipe, a solar water outlet pipe, a solar water inlet pipe, a hot water supply pipe and a hot water return pipe, and the water replenishing pipe, the solar water outlet pipe, the solar water inlet pipe, the hot water supply pipe and the hot water return pipe are communicated with the inner cavity of the bag body.

Furthermore, the upper end and the lower end of the shell are respectively provided with a flange plate interface, and the upper end and the lower end of the bag body are correspondingly and fixedly connected to the two flange plate interfaces.

Furthermore, the solar water outlet pipe and the hot water return pipe are arranged on a flange plate interface positioned at the upper end, and the solar water inlet pipe, the hot water supply pipe and the water replenishing pipe are arranged on a flange plate interface positioned at the lower end.

Furthermore, the solar water outlet pipe and the hot water return pipe are both provided with branch pipes, and the branch pipes are provided with automatic exhaust valves.

Further, a liquid level sensor and a temperature sensor are arranged in the bag body.

Further, the bag body is made of butadiene-acrylonitrile rubber, and the shell is made of carbon steel or stainless steel and is plated with anti-corrosion paint.

Compared with the prior art, the invention has the following beneficial effects:

1. the closed non-pressure-bearing buffer water tank can solve the problem of aerobic corrosion of an open water tank in a conventional centralized solar water heating system, greatly improves the operation stability and the service life of the system, can meet the requirement of a non-pressure-bearing heat collector on the operation pressure, and can enable the system to be in a closed anaerobic state;

2. the bag body is arranged at the upper end and the lower end of the shell through an upper flange plate interface and a lower flange plate interface, so that a water supplementing pipe, a solar water outlet pipe, a solar water inlet pipe, a hot water supply pipe, a hot water return pipe and the like can be conveniently arranged;

3. the branch pipe is provided with an automatic exhaust valve which can exhaust free gas and soluble gas in the capsule body;

4. the invention has simple structure, safety, reliability and low cost, can completely replace an open buffer water tank and has good popularization and application values.

Drawings

FIG. 1 is a schematic structural diagram of a closed non-pressure-bearing buffer water tank according to the present invention;

FIG. 2 is a schematic diagram of the closed non-pressure-bearing buffer water tank applied to a solar water heating system;

in the figure, the solar water heater comprises a shell 1, a shell 2, a bag body 3, a flange interface 4, a vent pipe 5, a solar water outlet pipe 6, a solar water inlet pipe 7, a hot water supply pipe 8, a hot water return pipe 9, a water replenishing pipe 10 and an automatic exhaust valve.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

As shown in fig. 1, the embodiment discloses a closed non-pressure-bearing buffer water tank, which comprises a tank body, a water replenishing pipe 9, a solar water outlet pipe 5, a solar water inlet pipe 6, a hot water supply pipe 7 and a hot water return pipe 8. The tank is composed of a housing 1 and a bladder 2 containing water. The shell 1 is cylindrical, the top surface and the bottom surface of the shell are arc-shaped bulges so as to improve the overall strength of the shell 1, and the shell 1 is made of carbon steel or stainless steel and is plated with anti-corrosion paint. The outer wall of the shell 1 is provided with an insulating layer, and the outer surface of the shell 1 can be covered with rubber plastic for heat preservation or provided with an interlayer outside the shell 1 and filled with a foaming insulating material, because the heat preservation technology belongs to the conventional means, the details are not described here. The upper end and the lower end of the shell 1 are respectively provided with a flange plate interface 3, the capsule body 2 is arranged in the shell 1, and the upper end and the lower end of the capsule body 2 are correspondingly and fixedly connected on the two flange plate interfaces 3. The capsule body 2 is made of rubber such as butadiene-acrylonitrile rubber, the maximum working temperature is 120 ℃, and the capsule body also has the characteristic of corrosion resistance.

Install breather pipe 4 in the top one side of shell 1, breather pipe 4 intercommunication the shell 1 and the intermediate layer chamber of utricule 2 to guarantee no matter be inflation or shrink, utricule 2 external pressure is atmospheric pressure all the time. The solar water outlet pipe 5 and the hot water return pipe 8 are arranged on the flange plate interface 3 positioned at the upper end, the solar water inlet pipe 6, the hot water supply pipe 7 and the water replenishing pipe 9 are arranged on the flange plate interface 3 positioned at the lower end, and the water replenishing pipe 9, the solar water outlet pipe 5, the solar water inlet pipe 6, the hot water supply pipe 7 and the hot water return pipe 8 are all communicated with the inner cavity of the bag body 2. So design, the end of intaking of utricule 2 all is on the top, need not overcome inside liquid level pressure and do benefit to the exhaust during intaking. All be equipped with the bleeder on solar energy outlet pipe and hot water wet return 8, install automatic exhaust valve 10 on the bleeder, can discharge the free gas and the solubility gas in the utricule 2.

In order to detect the water level and temperature in the capsule 2, a liquid level sensor and a temperature sensor are installed in the capsule 2 according to requirements, and a controller and a display electrically connected with the liquid level sensor and the temperature sensor are installed outside the tank body, so that the water temperature and the liquid level in the capsule can be detected, and the solar energy system belongs to the conventional solar energy system parameter setting, and the water temperature and the liquid level are not described in detail because the water temperature and the liquid level belong to the conventional technical means.

As shown in fig. 2, the closed non-pressure-bearing buffer water tank of the invention is applied to a solar water heating system to replace an open buffer water tank, a water outlet of a solar heat collector is communicated with a solar water outlet pipe 5, a water inlet of the solar heat collector is communicated with a solar water inlet pipe 6, a hot water supply pipe 7 and a hot water return pipe 8 extend to a user end for heat exchange, and a water replenishing pipe 9 is communicated with water replenishing equipment.

Hot water generated by the solar heat collector enters the bag body 2 through the solar water outlet pipe, and then is circulated to the solar heat collector from the solar water inlet pipe 6 by using the heat collecting pump, so that solar heat collecting circulation is formed. On the other side, hot water in the bag body 2 is conveyed to the tail end of a user for heat exchange through a hot water supply pipe 7 by a heat supply pump, and then returns to the bag body 2 through a hot water return pipe 8 to form tail end heat supply circulation. And a water replenishing electromagnetic valve is arranged on the water replenishing pipe 9 and is controlled to be opened and closed according to the liquid level signal. When the water temperature in the solar system rises and expands, the bag body 2 of the buffer water tank expands along with the water temperature to accommodate the water quantity expanded by the system; when the water temperature is reduced and contracted, the bag body 2 is contracted along with the water temperature, and water is supplemented to the solar energy system; when the liquid level in the bag body 2 is lower than a set value, the water replenishing electromagnetic valve is opened to replenish water to a designed liquid level.

The invention replaces the traditional open buffer water tank to realize the functions of water supplement and buffering, isolates air to realize closed anaerobic operation, and simultaneously ensures that the solar energy system avoids overpressure when being applied. The bag body can change along with the expansion and contraction of the system medium, has the function similar to that of an expansion tank, but can not cause the pressure inside the solar system to be increased or reduced when the expansion amount or the supplementary contraction amount of the accommodating system is contained, so that the solar system basically operates under the normal pressure state, and is suitable for an unpressurized solar heat collector system.