KR20000000288U - Gas control valve - Google Patents

Abstract

The present invention discloses a control valve suitable for use in a pre-source supply valve that controls the supply of combustion gas to a gas boiler.

The gas control valve of the present invention is formed in a cup shape in which the valve body is closed with a closing plate at an upper part of a side wall formed of a hollow cylinder by a permeable material. At least one control passage having a slot shape extending in a direction is formed and configured to accurately adjust the gas supply amount by opening and closing the gas passage in a proportional control manner according to the amount of current supplied to the winding body.

Description

Gas control valve

The present invention relates to a gas control valve, and more particularly to a gas control valve suitable for use as a gas supply valve for supplying combustion gas to the burner of the gas boiler.

A boiler is a device that provides heating or hot water by using hot water or steam generated by heating water. These boilers use a variety of fuels, and can be classified into instant heating type and low boiling type according to the heating characteristics of the fuel.

Low-boiling boilers use coal briquettes or oil as fuel to heat water and store it in a hot water storage tank to supply heating or hot water as needed. In contrast, instantaneous heating boilers may be provided with a main heat exchanger and / or a heat exchanger for hot water in the boiler body to immediately supply heating or hot water if necessary. Gas boilers correspond to instantaneous heating boilers, and are widely used as household heating boilers recently because of the ease of supply and use of city gas.

Fig. 1 schematically shows the configuration of such a domestic gas boiler, which shows a dual type boiler employing a dual type heat exchanger which performs heating of heating water and hot water at the same time in a main heat exchanger. The single-type boiler, which is distinguished from this, performs only heat exchange of the heating water with the main heat exchanger, and there is a difference in heating hot water by passing the heated heating water through a separate secondary heat exchanger or a heat exchanger for hot water. There is no big difference in composition and action.

In FIG. 1, a heat exchanger X is installed on a combustion chamber equipped with a burner B, and an exhaust hood H is installed on an upper portion thereof. Symbol F is an exhaust fan of the exhaust hood H and M is its motor. The dual type heat exchanger (X) is provided with a hot water heating tube (11) in the heating water heating tube (12), which is directly heated by the gas flame of the burner (B), and heated by the burner (B). The hot water is heated secondarily by the heating water heat exchange with the hot water. The dual designation means that the heating water and the hot water are heated at once in one heat exchanger (X).

Here, the burner B is supplied with combustion gas such as LNG or LPG from a city gas pipe or a storage container, and a supply valve is used to control and regulate the supply.

Figure 2 shows the configuration of a supply valve generally used in domestic gas boilers.

In Figure 2, the supply valve is basically composed of a plurality of valves (plural) by a plurality of valves to prevent the risk of safety accidents due to gas leakage in the case of some valve abnormalities. As shown in the drawing, a supply valve having three stages is provided with the first and second valves V1 and V2, which are simple on / off valves, and the tertiary valve V3, which is a proportional control valve, in sequence with respect to the gas path G. It consists of. Each valve (V1-V3) is composed of a solenoid valve to be remotely controlled by the main control unit of the boiler, etc. The third valve (V3), which is a proportional control valve, is provided with an elastic membrane such as a diaphragm (D). By adjusting the rotation of the adjustment screw (S) of the opening and closing can be adjusted.

However, the conventional supply valve of such a configuration has a number of problems as follows.

That is, each valve (V1-V3) using the solenoid valve of the general configuration moves in the direction crossing the gas path (G) and opens and closes the gas path (G) so that a plurality of valves (V1-V3) must be complicatedly curved. ) Can be installed. Therefore, the supply resistance of the gas is large, the pressure drop is increased, and the gas path G is not merely a straight pipe or a curved pipe, but can be manufactured as a molded product. Cast iron, aluminum die casting, etc. are used as the moldings, and all of them have problems such as manufacturing cost and high temperature corrosion, which increases the cost of the boiler and shortens the service life.

In addition, since the gas path (G) must form a valve seat that engages each valve (V1-V3) to open and close the gas path (G) as a simple passage for the combustion gas, it is difficult to manufacture a single molding. It is composed of the above-mentioned partitions and then joined to each other. Since the gasket or the O-ring must be inserted in the joint to prevent the leakage of gas, the assembling work becomes very large. Since V1-V3) is also combined by inserting a gasket or O-ring, the assembly labor is increased.

For example, the supply valves of FIGS. 2A and B are formed by combining two separate bodies separately, and then joining two plates to form a gas path G, and then three valves V1-V3. Since it is composed by assembling the structure is very complicated, bulky and has a very large assembly labor.

In addition, the conventional supply valve is bulky compared to the height, causing other additional problems in the structure of the boiler. In other words, a typical domestic boiler is housed in a cuboid-shaped cabinet, which cannot be provided outside the heat exchanger due to high heat in the upper part of the combustion chamber, so that the remaining components, such as a control plate, a pump, or a triangular valve, The lower part of the combustion chamber is provided at a certain interval apart. Therefore, since the volume of the supply valve is large and does not interfere with the arrangement of other components, and its height is low, a separate pipe is required for connection with the supply manifold of the burner B of the combustion chamber. Since it can not support the bracket (bracket) such as a separate support is required.

As a result, the conventional supply valve not only has high manufacturing cost and assembly labor, but also causes a problem of complicated boiler construction and increased volume.

In view of such a conventional problem, the present applicant has created a gas supply valve having a configuration as shown in FIGS. 3 and 4 and filed in 1998 Patent Application No. 14804 of April 25, 1998.

3 and 4, the first source gas supply valve is composed of a valve head 42 for opening and closing the gas path on one side of the stock 43 and an investment material on the other side, and passing through at least one of them. A valve body 40 having a cylindrical core 41 in which a hole 41a is formed, and is supported between the outer plates 11, 21, 31 and the intermediate plates 12, 22, 32 and is provided with a valve body 40. A winding body 50 for accommodating the core 41 of the axially movable element and forming an electromagnet providing a moving force of the core 4l, and the valve head 42 of the valve body 40. A sheet plate 13, 23 having valve seats 13a, 23a, 23b for contacting the gas path to open and close the gas path, and interposed between the intermediate plates 12, 22, 32 and the sheet plates 13, 23; The outer cylinder which forms the gas path opened and closed by the valve head 42 of the valve body 40 and the valve seats 13a, 23a, 23b of the sheet plates 13, 23 by sealing the space of the outside with the outside. A valve assembly having a 60; 20, 30) constitute the primary to tertiary valves (V1-V3). (Refer to the above application for details and unexplained symbols of the remaining configurations.)

Such a prior application gas supply valve has achieved a very large effect of greatly reducing the manufacturing cost and manufacturing labor of the gas supply valve compared to the conventional configuration and further reduce the required size of the gas boiler having the same and simplify the structure.

However, in order to control the gas boiler, the gas supply amount has to be adjusted according to the degree of combustion required by the user. The gas supply valve of the above-described configuration opens and closes the gas path with high reliability. The narrow adjustable range of the cross-sectional area makes it difficult to use as an efficient control valve.

Accordingly, an object of the present invention is to provide a gas control valve that can be used in conjunction with the above-described pre-application gas supply valve to control the amount of gas supply.

1 is a schematic cross-sectional view showing a general configuration of a gas boiler,

Figure 2A and B are side cross-sectional views showing the configuration of a conventional supply valve,

Figure 3 is a side cross-sectional view showing the configuration of the pre-application supply valve of the present applicant,

4 is an exploded perspective view of the main portion thereof;

5A and B are sequential cross-sectional views showing one configuration and operation of the control valve of the present invention;

6 is an exploded perspective view of the main portion thereof;

7 is a cross-sectional view showing another configuration of the subject innovation control valve;

8A to C are sequential cross-sectional views showing the operation of the control valve of FIG.

9 is a cross-sectional view showing another configuration of the control valve of the present invention.

<Description of the code used in the main part of the drawing>

1: valve body

2: sidewall

3: finishing plate

4: adjusting hole

5,6,7: top plate, bottom plate, middle plate

8: boss

50: coil body

60: outer cylinder

70: compression spring

90: tie bar

The gas control valve of the present invention basically uses the members of the first source gas supply valve as it is, and the valve body is formed of a hollow cylinder by the permeable material. It is configured in the form of a closed cap (cap), characterized in that at least one control passage in the form of a slot (slot) extending in the vertical direction on the side wall.

According to such a configuration, the displacement of the valve body changes according to the amount of current supplied to the winding body, and accordingly the flow passage cross-sectional area of the control passage changes, thereby enabling accurate control of the gas supply amount.

Therefore, the gas control valve of the present invention is used in conjunction with the pre-applied gas supply valve to enable a reliable opening and closing of the gas supply, and thus has a great effect in realizing a high quality gas boiler having high reliability and convenience of use.

Example

Such specific features and advantages of the inventive gas control valve will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

Preferably, the gas control valve of the present invention is suitable to be used to replace any one of the primary to tertiary valves V1-V3 in the pre-application gas supply valve of FIGS. 3 to 4. Due to the nature of the control, the gas control valve preferably constitutes a tertiary valve (V3). Then, the primary valve (V1) and the secondary valve (V2) constitute two open / close valves that are fail-safe. The tertiary valve V3 according to the present invention constitutes a control valve for controlling the gas supply amount.

Accordingly, the embodiment shown in Figs. 5A and B also refers to the components of the third valve V3 of Figs. 3 to 4, and if necessary, the names and member numbers are used as they are.

5 to 6, the control valve of the present invention has an upper plate 5 (preferably located at the position of the outer plate 31 of FIGS. 3 and 4) and a lower plate 6 (preferably the sheet plate 23 of FIGS. 3 and 4). Position), and an intermediate plate 7 therebetween (preferably located at the position of the intermediate plate 32 in FIGS. 3 and 4) between the through holes 5a, 6a, and 7a, respectively. Cylindrical winding body in which an inner diameter portion 51 is formed inside, such as a prior application, in any one of the space between the upper plate 5 and the intermediate plate 7 or the lower plate 6 and the intermediate plate 7. 50 is provided and the outer cylinder 60 is provided in the other space to form a valve.

The valve body 1 has a side wall 2 formed of a hollow cylindrical body made of an investment material, for example, a core material, for elevating the inner diameter 51 of the winding body 50, and the side wall ( The upper part of 2) is preferably formed in a cup shape in which the disk-shaped finishing plate 3 is closed and inverted as a whole. The side wall 2 is formed with at least one control passage 4 extending in the form of a slot in the vertical direction.

In this embodiment, the valve body 1 is elastically biased to the upper plate 5 side by the compression spring 70 supported by the intermediate plate 7 to maintain the normally closed state. Preferably, a gasket 9 formed of an elastic material such as heat resistant rubber is provided to be in sealing contact with the through hole 5a of the upper plate 5. For the convenience of coupling the gasket 9, the closing plate 3 of the valve body 1 has a flange portion 3a protruding from the diameter of the side wall 2 and the gasket 9 has a letter “C”. A coupling jaw 9b having a shape is coupled to and supported by the flange portion 3a of the closing plate 3.

In order to completely seal the gasket 9, a valve seat must be provided between the through-hole 5a of the upper plate 5. A ring-shaped sealing jaw 9a is integrally formed on the upper surface of the gasket 9. If the upper plate 5 is formed of a simple flat plate is preferable.

The remaining reference numeral 71 is a spring sheet which transmits the spring force of the compression spring 70 and maintains the coupling state of the gasket 9, and other components such as tie bars 90 which couple the plates 5, 6 and 7. For details, see the configuration of the pre-opening valve of FIGS. 3 to 4.

The control valve of the present invention maintains the normally closed state as shown in FIG. 5 (A) by the compression spring 70, and when the power is supplied to the winding body 50, the valve body 1 moves downward by the magnetic force. Pulled so that the gasket 9 on the closing plate 3 is separated from the through-hole 5a of the upper plate 5 as shown in Fig. 5 (B), and thus between the outer cylinder 60 through the adjusting passage 4; The gas passage is opened to supply gas.

At this time, the amount of movement of the valve body 1 is changed by changing the magnetic force resisting the elastic biasing force of the compression spring 70 in accordance with the power supplied to the winding body 50, and then the gasket of the valve body 1 By changing the interval between the through holes 5a of the upper plate 5 and the upper plate 5, the cross-sectional area of the gas passages between the two changes, and as a result, the proportional control of the gas supply amount becomes possible.

On the other hand, the embodiment of Figure 7 is configured to perform the adjustment of the gas passage through the control passage (4) in order to more accurately perform the control action of the gas supply by the valve of the present invention, for this purpose the valve body (1) is the top plate ( It is elastically biased toward the intermediate plate 7 side by the compression spring 70 supported by 5). According to such a structure, the side wall 2 except the closing plate 3 of the valve body 1 enters the inner diameter part 51 of the winding body 50, and the control passage 4 is closed, so it is always closed. As the state is formed, the sealing jaw 9a of the gasket 9 is formed on the lower surface thereof for sealing with the through hole 7a of the intermediate plate 7.

Unlike the previous embodiment, this embodiment opens and closes the valve by the repulsive force of the valve body 1 and the gunship body 50. For this purpose, the valve body 1 has a polarity in a predetermined direction, that is, up and down NS. Or it is composed of a pair of SN. Then, the movement amount of the valve body 1 can be changed as shown in FIGS. 8A to 8C according to the amount of current supplied to the winding body 50, and according to the movement amount of the valve body 1, the intermediate plate ( Since the size of the control passage 4 exposed on the through hole 7a of 7), that is, the cross-sectional area of the flow passage of the gas passage, is changed, the gas supply amount can be controlled.

That is, FIGS. 8A to 8C expose the control passage 4 of the valve body 1 by 1/3, 1/2, and 1 according to the amount of current supplied to the winding body 50, respectively. An example of controlling the flow path cross-sectional area and thus the gas supply amount to 1/3, 1/2, and 1 of the maximum supply amount is shown, respectively.

Such an embodiment of Figs. 7 to 8 enables accurate proportional control of the gas supply amount, but uses the repulsive force, so the valve body 1 needs to be composed of large magnets, that is, permanent magnets. However, the permanent magnet is gradually decayed over time, especially in a high-temperature, metal-enclosed environment, such as a gas boiler, the magnetic force is remarkable, there is a fear that the control characteristics change.

Accordingly, the embodiment of FIG. 9 discloses a configuration in which the valve body 1 is not composed of permanent magnets while the control passage 4 is used to control the gas supply amount as shown in FIG. 8. In the configuration of FIG. 6, a cylindrical boss portion 8 surrounding the side wall 2 of the valve body 1 extends above the intermediate plate 7. Preferably, the upper end of the boss portion 8 is located at a level lower than the lower end of the control passage 4, so that the valve body 1 is lowered according to the amount of current supplied to the winding body 50. As the degree of exposure of the control passage 4 to the boss portion 8 is changed while being pulled out, the accurate proportional control of the gas supply amount is possible.

As described above, the control valve of the present invention is very simple, while exhibiting the excellent characteristics of the pre-apply supply valve, which is not only very cheap and low in manufacturing cost and assembly labor, but also simplifies and miniaturizes the configuration of the boiler having the same. Providing reliable proportional control function.

Claims (4)

In the gas supply valve which is stored in the inner diameter portion of the cylindrical winding body and moved by its magnetic force to open and close the gas passage, The valve body (1) is formed in a cup shape with a side wall (2) formed of a hollow cylindrical shape by a permeable material and a disk-shaped closing plate (3) for closing the upper portion thereof, and is formed in a cup shape. Gas control valve, characterized in that formed by forming at least one control passage (4) of the slot form extending in the vertical direction. The method of claim 1, The side wall 2 of the valve body 1 is accommodated in the inner diameter part 51 of the winding body 50, and the side wall with respect to the inner diameter part 51 in accordance with the amount of current supplied to the winding body 50. Gas control valve, characterized in that the opening degree of the control passage (4) of (2) is changed. The method of claim 1, A part of the side wall 2 of the valve body 1 is accommodated in the boss portion 8 so that the control passage of the side wall 2 with respect to the boss portion 8 in accordance with the amount of current supplied to the winding body 50. Gas control valve, characterized in that the opening degree of (4) is changed. The method of claim 1, The closing plate 3 of the valve body 1 has a flange portion 3a which is larger than the diameter of the side wall 2, and a sealing jaw 9a for sealing the gas passage to the flange portion 3a is provided. Gas control valve, characterized in that the coupling jaw (9b) of the gasket having a coupling.