CN219118280U

CN219118280U - Cavity anti-freezing structure

Info

Publication number: CN219118280U
Application number: CN202120601142.9U
Authority: CN
Inventors: 平志雄; 翟红雨
Original assignee: Changhe Smart Home Jiaxing Co ltd
Current assignee: Changhe Smart Home Jiaxing Co ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2023-06-02
Anticipated expiration: 2031-03-24

Abstract

The utility model discloses a cavity anti-freezing structure, which comprises: the first pipeline part comprises a water inlet, an outer pipe I and an inner pipe I, wherein the water inlet is arranged outside the outer pipe I and is concentrically arranged, the inner pipe I is arranged inside the outer pipe I and is concentrically arranged, and the water inlet is communicated with the inner pipe I; the second pipeline part comprises an outer pipe II, an inner pipe II and a water outlet, wherein the water outlet is arranged outside the outer pipe II and is concentrically arranged, the inner pipe II is arranged inside the outer pipe II and is concentrically arranged, and the inner pipe II is communicated with the water outlet. The beneficial effects of the utility model are as follows: air is stored in a gas-liquid separation chamber formed by surrounding the annular groove I and the annular groove II, when water in the pipeline is frozen, the volume is enlarged, the water is extruded into the air chamber from the position between the inner pipe I and the inner pipe II, and the air is compressed, so that the water is prevented from being excessively extruded into the pipeline to burst.

Description

Cavity anti-freezing structure

Technical Field

The utility model belongs to the field of anti-freezing pipelines, and particularly relates to a cavity anti-freezing structure.

Background

The traditional containers such as a tap water pipe, a water tank, a heater and the like have the phenomenon of frost cracking of the pipeline and the water tank below zero. The normal production and life are not affected conveniently. The scheme aims at adopting a simple, reliable and low-cost scheme to absorb expansion stress during freezing, so that expansion and rupture of a closed pipeline and a container are avoided.

In the instant water heater industry, to avoid damage caused by freezing, there have been two anti-freeze solutions:

1. and a concave rubber diaphragm is arranged at the water inlet end or the water outlet end or both ends of the heater. Under the sealed condition of the water inlet and the water outlet, along with the reduction of the ambient temperature, the water in the heater is gradually iced, the volume is expanded, the pressure is increased, at the moment, the internal pressure can push the rubber membrane outwards, the rubber membrane can be changed from concave into convex, the volume is increased, a part of expansion pressure is absorbed, and the frost crack prevention effect is achieved. The disadvantages are: the volume increase is small during expansion, the anti-freezing effect is not ideal, and the assembly structure of the diaphragm is complex.

2. A section of thin-wall air pipe made of Teflon and other high-temperature resistant materials is arranged in the heater, and a section of air is sealed in the air pipe. When the water in the heater freezes, the volume expands, the pressure increases, the air pipe is compressed inwards, and the expansion pressure is absorbed. The scheme has better antifreezing effect. Disadvantageously, the volume of the air tube of this solution is limited by the internal volume of the heater; on the other hand, the inner air pipe often loses elasticity after being frozen and thawed for many times, and no longer has the antifreezing function.

In summary, in order to solve the existing technical problems, the utility model designs the cavity anti-freezing structure which is simple in structure, not easy to damage and good in anti-freezing effect.

Disclosure of Invention

The utility model aims to solve the existing technical problems, and designs a cavity anti-freezing structure which is simple in structure, not easy to damage and good in anti-freezing effect.

The aim of the utility model can be achieved by the following technical scheme:

a cavity freeze protection structure comprising:

the first pipeline part comprises a water inlet, an outer pipe I and an inner pipe I, wherein the water inlet is arranged outside the outer pipe I and is concentrically arranged, the inner pipe I is arranged inside the outer pipe I and is concentrically arranged, the water inlet is communicated with the inner pipe I, and an annular groove I is formed by encircling the outer pipe I and the inner pipe I;

the second pipeline part comprises an outer pipe II, an inner pipe II and a water outlet, the water outlet is arranged outside the outer pipe II and is concentrically arranged, the inner pipe II is arranged inside the outer pipe II and is concentrically arranged, the inner pipe II is communicated with the water outlet, and an annular groove II is formed by encircling the outer pipe II and the inner pipe II;

one side of the outer tube I, which is close to the inner tube I, is connected with one side of the outer tube II, which is close to the inner tube II, the annular groove I and the annular groove II are closed to form an air chamber, the inner tube I and the inner tube II are arranged at intervals, and a gap reserved between the inner tube I and the inner tube II is a gas-liquid separation chamber.

Further, the inner diameter ratio of the water inlet to the first inner tube is 3:2.

Further, one end of the inner pipe I, which is far away from the water inlet, is provided with a chamfer I facing to the center of the inner pipe I.

Further, a water receiving port is formed in one end, close to the first inner pipe, of the second inner pipe, and a chamfer second far away from the center of the water receiving port is formed in one end, close to the first inner pipe, of the water receiving port.

Further, the first outer tube and the second outer tube are connected with the clamping ring through clamping grooves, the clamping grooves are formed in the section of the first outer tube, and the clamping ring is arranged on the section of the second outer tube.

Compared with the prior art, the utility model has reasonable structural arrangement: 1. air is stored in a gas-liquid separation chamber formed by surrounding the annular groove I and the annular groove II, when water in the pipeline is frozen, the volume is enlarged, the water is extruded into the air chamber from the space between the inner pipe I and the inner pipe II, and the air is compressed, so that the water is prevented from being excessively extruded into the pipeline to burst; 2. because the air chamber is annular, no matter in what direction the cavity anti-freezing structure is installed, the air chamber volume which is larger than 1/10 of the cavity volume to be protected is always stored in the air-liquid separation chamber.

Drawings

FIG. 1 is a schematic structural diagram of the antifreeze structure of the cavity;

FIG. 2 is a schematic diagram of an antifreeze structure of a water pipe;

see fig. 1-2, wherein: 1. a first pipe section; 11. a water inlet; 12. an outer tube I; 121. a clamping groove; 13. an inner pipe I; 131. chamfering I; 14. an annular groove; 2. a second pipe section; 21. an outer tube II; 211. a clasp; 22. an inner pipe II; 221. a water receiving port; 222. chamfering II; 23. a water outlet; 24. annular groove II; 3. a gas-liquid separation chamber; a1, a pipeline air chamber; a2, a gas-liquid separation area; a3, a top cover.

Detailed Description

The technical scheme of the utility model is further described below by combining the embodiments. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiment one:

a cavity freeze protection structure comprising:

the first pipeline part 1 comprises a water inlet 11, an outer pipe I12 and an inner pipe I13, wherein the water inlet 11 is arranged outside the outer pipe I12 and is concentrically arranged, the inner pipe I13 is arranged inside the outer pipe I12 and is concentrically arranged, the water inlet 11 is communicated with the inner pipe I13, and an annular groove I14 is formed between the outer pipe I12 and the inner pipe I13 in a surrounding mode;

the second pipeline part 2 comprises an outer pipe II 21, an inner pipe II 22 and a water outlet 23, wherein the water outlet 23 is arranged outside the outer pipe II 21 and is concentrically arranged, the inner pipe II 22 is arranged inside the outer pipe II 21 and is concentrically arranged, the inner pipe II 22 is communicated with the water outlet 23, and an annular groove II 24 is formed by enclosing the outer pipe II 21 and the inner pipe II 22;

one side of the outer tube I12 near the inner tube I13 is connected with one side of the outer tube II 21 near the inner tube II 22, the annular groove I14 and the annular groove II 24 are closed to form an air chamber, the inner tube I13 and the inner tube II 22 are arranged at intervals, and a gap reserved between the inner tube I13 and the inner tube II 22 is the gas-liquid separation chamber 3.

Specifically, when in use, the water flow rushes into the water inlet 11 to enter the first inner pipe 13, the first inner pipe 13 is not connected with the second inner pipe 22, the lower part of the air chamber formed by closing the first annular groove 14 and the second annular groove 24 is provided with water, the water flow flows out of the first inner pipe 13 and then passes through the gas-liquid separation chamber 3, the water flows into the second inner pipe 22 due to pressure, the upper part of the air chamber is always stored with gas, and the gas cannot be pressed into the second inner pipe 22 due to the fact that the water level in the air chamber is higher than that in the gas-liquid separation chamber 3; when the water in the water pipe is frozen, the volume of the water is expanded, the pressure is increased, the water presses the gas in the gas-liquid separation chamber, the gas is compressed and a space is reserved for the water to flow in, the pressure of the water in the pipeline is reduced, and the pipe wall is prevented from being burst.

Embodiment two:

the difference between the second embodiment and the first embodiment is that the inner diameter ratio of the water inlet 11 to the first inner tube 13 is 3:2.

Specifically, the inner diameter of the water inlet 11 is larger than the inner diameter of the first inner pipe 13 and the ratio is 3:2, so that the flow rate of water flowing into the first inner pipe 13 from the water inlet 11 can be properly increased, the water flow can be quickly injected into the second inner pipe 22, and the impact of the water flow on the gas-liquid separation chamber is reduced.

Embodiment III:

the third embodiment is different from the first embodiment in that a chamfer 131 facing to the center of the inner tube is provided at the end of the inner tube 13 away from the water inlet 11.

Specifically, the first chamfer 131 can concentrate water flow more, and reduce impact of water flow on the port of the second inner pipe 22.

Embodiment four:

the fourth embodiment is different from the third embodiment in that a water receiving port 221 is disposed at an end of the second inner tube 22 close to the first inner tube 13, and a chamfer 222 far from the center of the water receiving port 221 is disposed at an end of the water receiving port 221 close to the first inner tube 13.

Specifically, the water receiving port 221 corresponds to the port of the first inner pipe 13, so that the duty ratio of the gas-liquid separation chamber 3 can be reduced, the water flow is prevented from flowing back from the second inner pipe 22 to the air chamber, the water receiving port 221 can also be used for transition, the flow speed of the water flow in the second inner pipe 22 is slowed down, the second chamfer 222 can gather the water flow emitted from the first inner pipe 13 and is matched with the first chamfer 131, the impact on the port of the second inner pipe 22 is reduced, and meanwhile, the noise of the water flow can be reduced.

Fifth embodiment:

the fifth embodiment is different from the first embodiment in that the first outer tube 12 and the second outer tube 21 are connected with a clamping ring 211 through a clamping groove 121, the clamping groove 121 is arranged on the section of the first outer tube 12, and the clamping ring 211 is arranged on the section of the second outer tube 21.

Specifically, the connection between the clamping groove 121 and the clamping ring 211 can facilitate installation and disassembly, and when the gas amount in the gas-liquid separation chamber is insufficient, the clamping groove 121 and the clamping ring 211 can be disassembled, and the first annular groove 14 and the second annular groove 24 are separated for drainage.

The preferable scheme is as follows:

an upward pipeline air chamber A1 communicated with the inside of the pipeline can be arranged above a water pipe connected with the cavity antifreezing structure, gas is stored in the pipeline air chamber A1, the inner diameter of a communication port of the pipeline air chamber A1 communicated with the pipeline is smaller than that of the pipeline air chamber A1, and a formed gas-liquid separation area A2 can prevent the gas from flowing into the air chamber and exhausting the gas when water flows; the top cover A3 arranged above the pipeline air chamber A1 can be opened for draining and supplementing air when other air in the pipeline air chamber A1 is insufficient; when the water in the water pipe is frozen, the pressure is increased, the water can squeeze the gas in the compressed pipeline gas chamber A1 and flow into the pipeline gas chamber A1, so that the squeezing of the pipeline wall is reduced, and the pipeline is prevented from bursting.

The preferred embodiments of the present utility model are described herein, but the scope of the present utility model is not limited thereto. Modifications, additions, or substitutions of the described embodiments by those skilled in the art are intended to be within the scope of the present utility model.

Claims

1. A cavity freeze protection structure, comprising:

2. The cavity antifreeze structure of claim 1, wherein the ratio of the inner diameter of said water inlet to the inner diameter of said inner tube is 3:2.

3. The antifreeze structure of claim 1, wherein the end of the inner tube away from the water inlet is provided with a chamfer toward the center of the inner tube.

4. The cavity antifreezing structure according to claim 3, wherein the second inner tube has a water receiving opening at one end close to the first inner tube, and a chamfer second far from the center of the water receiving opening is provided at one end close to the first inner tube.

5. The cavity antifreeze structure of claim 1, wherein the first and second outer tubes are connected by a snap ring, the snap ring is disposed on the first cross section of the outer tube, and the snap ring is disposed on the second cross section of the outer tube.