WO2012043952A1

WO2012043952A1 - Expansion tank for a gas boiler

Info

Publication number: WO2012043952A1
Application number: PCT/KR2011/002932
Authority: WO
Inventors: 민태식
Original assignee: 주식회사 경동나비엔
Priority date: 2010-10-01
Filing date: 2011-04-22
Publication date: 2012-04-05
Also published as: EP2623882A4; RU2531717C1; EP2623882A1; CN103154632B; KR20120034460A; CN103154632A; KR101189894B1

Abstract

The present invention relates to an expansion tank for a gas boiler, which has a simple internal structure, is easy to manufacture, is capable of reducing costs, and is resistant to the working fluid pressure and corrosion induced by the working fluid. The expansion tank for a gas boiler of the present invention includes: a body having openings at the upper and lower portions thereof, including a grid-type unit which accommodates the working fluid, the interior of which is partitioned by a plurality of partitions so as to accommodate the working fluid, and which is integrally formed with the partitions; and upper and lower inner covers coupled to the body and covering the upper and lower openings.

Description

Expansion tank for gas boiler

The present invention relates to an expansion tank for a gas boiler, and more particularly, the internal structure is simple, making it easy to manufacture and reducing costs, as well as a gas boiler having pressure resistance and corrosion resistance to pressure changes of heating water. It relates to an expansion tank.

In general, gas boilers include an atmospheric open gas boiler and an atmospheric shutoff gas boiler. The atmospheric open gas boiler is made of a structure in which the heating water in the expansion tank is open to the atmosphere, and the atmospheric blocking gas boiler is made of a structure in which the heating water in the expansion tank is blocked from the atmosphere.

1 is a schematic view showing the configuration of a gas boiler equipped with a conventional open expansion tank.

In the atmospheric open gas boiler, the circulation pump 10 for circulating the heating water, the main heat exchanger 20 for transferring the heat energy of the burner 21 to the heating water pumped by the circulation pump 10, heating at the time of heating operation Three-way valve (30) for supplying heating water to the pipe (heating point) and supplying the heating water to the hot water heat exchanger (40) when using hot water, hot water heat exchanger (40) for supplying hot water by heating direct water when using hot water, The heating return is stored therein and is provided with an expansion tank 50 for absorbing the pressure change according to the temperature change of the heating water.

Reference numeral 61 denotes a heating water supply pipe, 62 a heating water return pipe, 63 a direct water pipe, and 64 a hot water pipe.

The open type expansion tank 50 is provided with a water level sensor 51 for detecting whether the heating water in the inside of the predetermined level range, the upper one side overflows to the outside when the heating water exceeds a certain level An overflow pipe 52 is formed so that the heating water is open to the atmosphere.

Such an open air gas boiler has advantages in that its structure is simple and easy to manufacture, and its manufacturing cost is low. However, since the heating water circulation system is open to the atmosphere, it cannot be installed below the boiler's heating piping (heating requirements). Therefore, there is a problem in that the installation position is limited, and since the heating water is exposed to the air, oxygen is introduced into the expansion tank 50, which may cause corrosion in the heating pipe.

Figure 2 is a schematic diagram showing the configuration of a gas boiler with a conventional hermetic expansion tank.

Atmospheric cut-off gas boiler is basically the same as the atmospheric open gas boiler in that the circulation pump 10, the main heat exchanger 20, the burner 21, the three-way valve 30, the hot water heat exchanger 40 is provided. , The expansion tank 70 is distinguished from the atmosphere open type in that the sealed type is isolated from the atmosphere, and the separator (71), the overpressure safety valve (72), the pressure gauge (73) is further installed.

The expansion tank 70 is a sealed structure that is blocked from the outside air, a rubber plate (70a) is installed inside, the gas storage unit filled with a gas (for example, nitrogen) therebetween with the rubber plate (70a) in between. 70b and the heating water storage part 70c which accommodates heating water are formed. The rubber plate 70a is adapted to absorb the pressure change of the heating water by being deformed according to the acting pressure.

Unlike the atmospheric open gas boiler, the above-described atmospheric cut-off gas boiler is not limited to the installation position of the boiler, and the heating water circulation system is blocked from the atmosphere, which has the advantage of preventing oxygen from flowing into the heating water. On the other hand, due to the gas pressure of the gas filled in the gas storage unit (70b) absorbs the pressure change of the heating water, its function is reduced when used for a long time, and the structure is made of a structure that is filled with the gas inside the structure is complicated This is not easy and the manufacturing cost is not only expensive, but also made of a steel material has the disadvantage that there is a risk of corrosion.

As described above, the conventional open type expansion tank 50 has the disadvantage of causing limitations in the installation position and corrosion of the heating pipe, and the conventional closed type expansion tank 70 is not easy to manufacture due to the complicated structure and high manufacturing cost. Since there is a disadvantage, it is required to develop an expansion tank made of a structure that can compensate for the disadvantages of these conventional expansion tanks.

The present invention was devised to solve the above problems, and its purpose is to provide an expansion tank for a gas boiler having a pressure resistance and corrosion resistance to heating water, while being easy to manufacture and reducing costs due to its simple internal structure. have.

Gas boiler expansion tank of the present invention for realizing the object as described above, the upper and lower openings are partitioned by a plurality of diaphragm inside there is provided a lattice type heating water receiving portion receiving the heating water and integral with the diaphragm Body consisting of; It includes; the upper inner cover and the lower inner cover coupled to cover the open upper and lower portions of the body.

An upper outer cover may be attached to an upper portion of the upper inner cover, and a lower outer cover may be attached to a lower portion of the lower inner cover.

In addition, the grid-shaped heating water receiving portion may be configured in a shape in which the outer surface of the body portion partitioned by the diaphragm is convex outward.

In addition, the body including the grid-shaped heating water receiving portion and the upper inner cover and the lower inner cover is made of a plastic material, the upper outer cover and the lower outer cover may be made of a steel material.

In addition, the upper edge of the body and the lower edge of the upper inner cover and the lower edge portion of the upper outer cover is formed with a flange which is projected outwardly stacked up and down, respectively, the upper and lower outer cover of the lower and lower inner cover of the body Edges protrude outwardly to form a vertically stacked flange, a plurality of bolts are penetrated at regular intervals from the flange formed on the upper outer cover to the flange formed on the lower outer cover and the ends of the bolts are fastened with nuts. It can be configured as.

In addition, the upper and lower support plates are installed in the upper and lower portions of the body, respectively, in the transverse direction, and flanges are formed at the upper and lower ends of the lattice-type heating water receiving portion to be inserted into and fixed in the holes formed in the upper and lower support plates. It can be configured as.

In addition, the upper support plate and the lower support plate may be made of a plastic material.

In addition, the upper support plate is installed at a position spaced apart from the upper end of the body by a predetermined interval between the upper support plate and the upper inner cover is provided, the lower support plate is spaced apart from the lower end of the body by a predetermined interval It is installed in the position is provided with a lower communication portion between the lower support plate and the lower inner cover, partitioned space of the grid-shaped heating water receiving portion may be configured to communicate with each other through the upper communication portion and the lower communication portion.

In addition, the lower end of the upper inner cover and the upper end of the lower inner cover may be formed in each of the protrusions in close contact with the inner peripheral surface of the body, the O-ring is interposed between the outer peripheral surface of the protrusion and the inner peripheral surface of the body.

In addition, the upper inner cover and the upper outer cover is formed in a convex shape toward the upper side, the lower inner cover and the lower outer cover may be formed in a convex shape to the lower side.

In addition, the body may be configured to additionally provided with a separator and the water level sensor and the over-pressure safety valve.

According to the gas tank expansion tank according to the present invention, the body and the upper and lower inner cover in contact with the heating water is made of a plastic material to improve the corrosion resistance, the upper and lower outer cover is made of steel material and the body and upper The lower inner cover and upper and lower outer covers are fastened with bolts and nuts, and the body has a lattice type heating water receiving portion made of plastic material to support rapid pressure change of the heating water and prevent breakage due to expansion. There are advantages to it.

In addition, according to the embodiment provided with a separator, a water level sensor and an overpressure safety valve in the expansion tank according to the present invention, the heating water in the expansion tank is made of an open structure below a certain level and when the water level exceeds a certain level in a sealed structure. As a result of the conversion, it is possible to solve the problem of corrosion of the heating pipe caused by the introduction of external oxygen into the expansion tank, and by detecting the water level inside the expansion tank, it is easy to determine whether the heating water is replenished. In case of sudden rise in pressure, it is possible to prevent damage to the device by adjusting to the proper pressure through the overpressure safety valve.

1 is a schematic view showing a configuration of a gas boiler having a conventional open expansion tank,

Figure 2 is a schematic diagram showing the configuration of a gas boiler with a conventional hermetic expansion tank,

3 is a front schematic view of an expansion tank for a gas boiler according to an embodiment of the present invention;

4 is an exploded view of an expansion tank for a gas boiler according to an embodiment of the present invention;

5 is a perspective view of a lattice-type heating water receiving unit provided inside the expansion tank body for the gas boiler shown in FIG. 4;

Figure 6 is a cross-sectional view of the A-A section of the gas tank expansion tank body shown in Figure 4,

7 is a sectional view taken along the line B-B of the expansion tank body for the gas boiler shown in FIG.

8 is a front schematic view of the expansion tank for a gas boiler according to another embodiment of the present invention.

** Explanation of Codes **

10: circulation pump 20: main heat exchanger

21: burner 30: trilateral

40: hot water heat exchanger 50,70,100,200: expansion tank

51 level sensor 52: overflow pipe

61: heating water supply pipe 62: heating water return pipe

63: water pipe 64: hot water pipe

70a: rubber plate 70b: gas storage unit

70c: heating water storage 71: water separator

72: overpressure safety valve 73: pressure gauge

110: body 111,113,121,131,141,151: flange

112, 114, 122, 132, 142, 152: fastener 115: lattice type heating water receiving portion

115a:

Body

115b, 115c: Flange

115d, 115e, 115f, 115g: plate 116: upper support plate

117: lower support plate 118: upper communication portion

119: lower communication portion 120: upper inner cover

124,144: protrusion 125,145: O-ring

130: upper outer cover 140: lower inner cover

150: lower outer cover 161: bolt

162: nut 210: separator

220: water level sensor 230: overpressure safety valve

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a front schematic view of an expansion tank for a gas boiler according to an embodiment of the present invention, FIG. 4 is an exploded view of an expansion tank for a gas boiler according to an embodiment of the present invention, and FIG. 5 is for the gas boiler shown in FIG. A perspective view of the lattice type heating water receiving unit provided inside the expansion tank body, FIG. 6 is a cross-sectional view of the AA part of the expansion tank body for the gas boiler shown in FIG. 4, and FIG. 7 is the BB of the expansion tank body for the gas boiler shown in FIG. 4. It is a section view.

Referring to FIG. 3, the gas boiler expansion tank 100 according to the present invention includes a tubular body 110 having a lattice-shaped heating water accommodating part 115 therein, and an upper portion of the body 110. The upper inner cover 120 is coupled to cover, the upper outer cover 130 is in close contact with the upper portion of the upper inner cover 120 and the lower inner cover 140 is coupled to cover the lower portion of the body 110 And a lower outer cover 150 that is tightly coupled to the lower portion of the lower inner cover 140 and provided with an inlet pipe 171 and an outlet pipe 172 for heating return, and the constituent members are bolts 161. It consists of a structure that is fastened to each other with a nut (162).

Here, the body 110 including the lattice-type heating water receiver 115, the upper inner cover 120, and the lower inner cover 140 are made of plastic, but are in contact with the heating water stored in the expansion tank 100. The structure is free from corrosion.

However, when the components of the expansion tank 100 is composed of only plastic material, when the water pressure of the heating water stored in the expansion tank 100 is increased, the expansion tank 100 may not be able to withstand the water pressure of the heating water and may be damaged. In order to supplement the water resistance of the upper outer cover 130 and the lower outer cover 150 which is not in contact with the heating water is made of a steel material.

Referring to Figure 4 describes the coupling structure of the expansion tank 100 as follows.

Body 110 is formed in a cylindrical shape of the upper and lower open, as shown in Figures 5 to 7 to disperse the water pressure of the heating water in the interior of the body 110 to withstand the pressure rise of the heating water The heating water accommodating part 115 having a lattice shape is provided, and

flanges

111 and 113 protruding outward are formed at upper and lower edges of the body 110.

The upper inner cover 120 and the lower inner cover 140 are formed in the same shape, are coupled to the upper and lower symmetrical shapes of the body 110, the upper outer cover 130 and the lower outer cover 150 also Consists of the same shape is coupled to the upper and lower inner cover 140 of the upper inner cover 120 in a symmetrical shape with each other.

The upper inner cover 120 and the upper outer cover 130 is formed in a cap shape formed with an empty space therein and formed in a convex shape upwards, the lower inner cover 140 and the lower outer cover 150 also the upper inner cover Consisting to the lower side symmetrically with the 120 and the upper outer cover 130.

The lower edges of the upper inner cover 120 and the lower edges of the upper outer cover 130 are formed with

flanges

121 and 131 protruding outwards, and the upper inner cover to the upper side of the flange 111 of the upper body 110. The flange 121 of the 120 and the flange 131 of the upper outer cover 130 are sequentially stacked and stacked.

Similarly,

flanges

141 and 151 protruding outward are formed at the upper edges of the lower inner cover 140 and the upper outer edges of the lower outer cover 150, and are lowered below the flange 113 at the lower end of the body 110. The flange 141 of the inner cover 140 and the flange 151 of the lower outer cover 150 are sequentially stacked to be stacked.

In addition, the lower end of the upper inner cover 120 is formed with a protrusion 124 protruding downwardly and is in close contact with the inner circumferential surface of the upper body 110, the upper protrusion of the upper inner cover 140 protruding upwards 144. ) Is formed to be in close contact with the inner circumferential surface of the lower body (110).

O-

rings

125 and 145 are provided on the outer circumferential surfaces of the

protrusions

124 and 144, and airtightness is maintained between the outer circumferential surfaces of the

protrusions

124 and 144 and the inner circumferential surface of the body 110.

A plurality of

fastening holes

132, 122, 112, 114, 142, and 152 are formed in the

flanges

131, 121, 111, 113, 141, and 151 at regular intervals, respectively, and the bolts 161 are inserted through the fastening holes 132, 122, 112, 114, 142, and 152 sequentially, and ends of the bolts 161 are provided. The nut 162 is fastened to the upper inner cover 120 and the upper outer cover 130 are coupled to the upper side around the body 110, and the lower inner cover 140 is lower than the body 110. And the lower outer cover 150 are combined.

Hereinafter, a configuration of the inside of the body 110 will be described with reference to FIGS. 5 to 7.

The inner space of the body portion 115a is partitioned by a plurality of

diaphragms

115d, 115e, 115f, and 115g so as to disperse the water pressure of the heating water to withstand the increase in the pressure of the heating water. The heating water accommodating part 115 is provided, and

flanges

115b and 115c protruding outwardly are formed at upper and lower ends of the body part 115a, respectively.

The grid-type heating water receiving portion 115 is made of a plastic material, the outer surface of the body portion 115a is formed in a convexly curved shape to the outside, partitioned by the partitions (115d, 115e, 115f, 115g) The pressure of the heating water accommodated in the compartment is uniformly distributed to the outside.

An upper support plate 116 and a lower support plate 117 made of a plastic material are installed in the upper and lower portions of the body 110 in a horizontal direction, and the side surfaces of the upper support plate 116 and the lower support plate 117 are the body 110. It is fixed to the inner circumferential surface of the. The upper support plate 116 and the lower support plate 117 are formed with holes having a size corresponding to the shape of the

flanges

115b and 115c formed at the upper end and the lower end of the lattice type heating water receiving unit 115. The

flanges

115b and 115c of the lattice type heating water receiver 115 are inserted and fixed.

As described above, the upper support plate 116 and the lower support plate 117 are installed in the transverse direction inside the body 110, and the lattice-shaped heating water is accommodated in the vertical direction between the upper support plate 116 and the lower support plate 117. The structure of the unit 115 is combined, so that the body 110 and the upper support plate 116 and the lower support plate 117 and the lattice-type heating water receiving unit 115 are both plastic and mutually supported. It is made of a structure that can withstand the water pressure of the heating water stored in the body (110).

The upper support plate 116 is installed at a position spaced apart from the top of the body 110 by a predetermined interval, and the lower support plate 117 is installed at a position spaced apart from the lower end of the body 110 by a predetermined interval.

Accordingly, in the structure in which the expansion tank 100 is coupled, an upper communication portion 118 is provided between the upper support plate 116 and the upper inner cover 120, and between the lower support plate 117 and the lower inner cover 140. The lower communicating portion 119 is provided, so that the grid type heating water receiving portion 115 has a structure in communication with each other inside the body 110.

In addition, as the upper communication unit 118 and the lower communication unit 119 is formed, the

protrusions

124 and 144 formed on the lower end of the upper inner cover 120 and the upper inner cover 140 as described above, the body 110. Space is provided that can be inserted into the inner circumferential surface of the.

In the present embodiment, the trunk portion 115a of the lattice-type heating water receiving portion 115 has been described as an example in which a part of the cylindrical shape whose outer surface is convex is overlapped adjacent to each other is taken as an example. Is not limited to this shape, and if the internal space is divided into a plurality of partitions to support and distribute the hydraulic pressure may be configured in other shapes, the number of compartments shown in the drawings may also be configured differently. It is self-evident.

8 is a front schematic view of the expansion tank for a gas boiler according to another embodiment of the present invention. Expansion tank 200 according to another embodiment of the present invention is the separator 110, the water level sensor 220 and the overpressure safety valve 230 in the body 110 of the expansion tank 100 according to the above-described embodiment It is further provided.

The water separator 210 is to prevent the problem that the heating pipe is corroded by discharging the air contained in the heating water to the outside of the expansion tank 200, communication with the atmosphere in accordance with the change in the water level inside the expansion tank (200) The air outlet is configured to open and close.

Accordingly, when the heating water stored in the expansion tank 200 is below a predetermined level, the heating structure is formed. When the heating water exceeds the predetermined level, the heating structure is converted into a closed structure.

The water level detection sensor 220 provides a criterion for determining whether to replenish the heating water by making it easy to grasp the level of the heating water stored in the expansion tank 200 from the outside.

The overpressure safety valve 230 has a structure that is automatically opened when the pressure of the heating water rises suddenly in the expansion tank 200, the expansion tank 200 is provided on the upper side of the body 110 By forcibly exhausting the compressed air inside to the outside it is possible to maintain the pressure inside the expansion tank 200 to a suitable level or less.

According to the present embodiment, the water separator 210 and the overpressure safety valve 230 may correspond to the pressure change of the expansion tank 200, and it is possible to easily determine whether the heating water is replenished through the water level sensor 220. Will be.

Claims

A body configured to be integrated with the diaphragm, the upper and lower openings of which are provided with a lattice type heating water receiving unit which is divided by a plurality of diaphragms to receive heating water;

An upper inner cover and a lower inner cover coupled to cover the open upper and lower portions of the body;

Expansion tank for gas boiler comprising a.
The method of claim 1,

An upper outer cover is attached to an upper portion of the upper inner cover, and a lower outer cover is attached to a lower portion of the lower inner cover.
The method of claim 1,

The grid-type heating water receiving portion is an expansion tank for a gas boiler, characterized in that the outer surface of the body portion partitioned by the partition is formed convexly curved outward.
The method of claim 2,

The body including the grid-type heating water receiving portion and the upper inner cover and the lower inner cover is made of a plastic material, the upper outer cover and the lower outer cover is an expansion tank for a gas boiler, characterized in that made of steel.
The method of claim 2,

The upper edge of the body and the lower edge of the upper inner cover and the lower edge portion of the upper outer cover are formed with a flange which projects upwards and is stacked up and down, respectively,

The upper edges of the lower and lower outer cover of the lower body and the lower inner cover are formed with flanges which protrude outward and are stacked up and down, respectively.

And a plurality of bolts penetrated at regular intervals from a flange formed on the upper outer cover to a flange formed on the lower outer cover, and an end of the bolt is fastened by a nut.
The method of claim 1,

An upper support plate and a lower support plate are respectively installed in the upper and lower portions of the body in the transverse direction, and flanges are formed at the upper and lower ends of the lattice-type heating water receiving portion to be inserted into and fixed in the holes formed in the upper support plate and the lower support plate. Expansion tank for gas boiler, characterized in that.
The method of claim 6,

The upper support plate and the lower support plate is an expansion tank for a gas boiler, characterized in that made of a plastic material.
The method of claim 6,

The upper support plate is installed at a position spaced apart from the upper end of the body by a predetermined interval is provided with an upper communication portion between the upper support plate and the upper inner cover, the lower support plate is spaced apart from the lower end of the body by a predetermined interval Is installed in the lower communication plate is provided between the lower support plate and the lower inner cover, the partition space of the grid-shaped heating water receiving portion for the gas boiler characterized in that the structure made in communication with each other through the upper communication portion and the lower communication portion. Expansion tank.
The method of claim 8,

The lower end of the upper inner cover and the upper end of the lower inner cover is formed with a protrusion in close contact with the inner circumferential surface of the body, respectively, an expansion for the gas boiler, characterized in that the O-ring is interposed between the outer circumferential surface of the protrusion and the inner circumferential surface of the body Tank.
The method of claim 2,

The upper inner cover and the upper outer cover is formed in a convex shape to the upper side, the lower inner cover and the lower outer cover is a gas boiler expansion tank, characterized in that formed in a convex shape to the lower side.
The method according to any one of claims 1 to 10,

The body of the gas tank expansion tank characterized in that the separator and the water level sensor and the over-pressure safety valve is further provided.