KR20060103697A - Automatic water level control valve and boiler having thereof - Google Patents

Abstract

According to the present invention, a water inlet is formed at one side, a valve body having a water outlet at the other side, a valve assembly installed at an inlet side of the water outlet, and a water inlet is formed, and is introduced through a water inlet of the valve assembly. A water discharge hole for discharging water is formed, and a water inlet side space opposite to the valve assembly is formed with a water pressure difference so that the valve assembly forms an operation space for opening and closing the water discharge port and the expansion tank. Provided therein is an automatic water level control valve including a float assembly for opening and closing the water discharge hole of the tube in accordance with the level of the expansion tank, and a boiler having the same, a boiler having such an automatic water level control valve According to the present invention, a valve is not installed on the path of the heating water circulation pipe and an automatic water level control valve is installed in the water supply pipe. The water level adjustment function is performed irrespective of life, and it does not need the check function even in the single water, and the maintenance is convenient when maintenance is maintained, and the serviceability is remarkably improved. In the case of replacing the whole, the water in the pipe is not drained, so the workability is improved, and the solenoid coil is not used without the solenoid coil, thereby reducing the cost.

Boiler, Level Control Valve, Float, Valve Assembly, Diaphragm

Description

Automatic water level control valve and boiler having

1 is a cross-sectional view of a boiler installed with an automatic water level control valve according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1. FIG.

3 and 4 is an operation of the automatic level control valve according to the invention,

  3 is a state in which the valve is closed,

  4 is a state in which the valve is open.

<Description of Symbols for Main Parts of Drawings>

3; Expansion tank 5; feed pipe

10; Automatic Water Level Control Valve

11; Valve body 12; Water inlet

13; Water outlet 14; Valve assembly

14a; Diaphragm 14b; Diaphragm seat

14a-1,14b-1; Water inlet hole 15; tube

15a-1; Water discharge hole 17; filter

21; Float 22; lever

23; Axis of rotation 24; Disc packing

The present invention relates to an automatic water level control valve for a boiler, and more particularly, a valve assembly operated by a water supply-side water pressure and a water pressure difference inside an expansion tank is operated to interlock with a mechanical level sensing operation of a float to replenish water in an expansion tank. It relates to an automatic water level control valve and a boiler provided with the same.

In general, the boiler is heated by the combustion heat of the combustion device to generate hot water, and the hot water is supplied to the heating line through the circulation pipe to be heated or heat exchanged with the hot water supply coil, the water of the hot water supply coil The temperature is raised to obtain a hot water supply to heat the room or supply hot water.

These boilers are stored in the heat exchanger as much as the volume of the replenishment water increases when it is heated by the combustor, and an expansion tank is installed to return the water by the amount reduced because the volume decreases when the temperature of the heat exchanger decreases. do.

The water supply valve that replenishes the water with the expansion tank supplies water by opening and closing the flow path by a signal of the low water level sensor attached to the expansion tank using an electronic water supply valve having a solenoid valve.

However, the conventional electronic water supply valve is unable to function during power failure, and thus cannot function properly, and in the event of a device defect such as disconnection of the coil of the solenoid valve during use, the supply of supplemental water due to a malfunction is blocked. There is a problem.

In addition, in the case of using a conventional mechanical water supply valve, the buoyancy of the buoy does not overcome the water pressure, the opening and closing action is not smooth, and in order to overcome the water pressure, the volume of the buoy must be excessively large, so that it is not practical to apply to the expansion tank. There is.

The object of the present invention devised in view of such a problem is to open and close the valve by the difference between the inlet water pressure and the supply water pressure, and to automatically perform the water level adjustment by determining the opening and closing time of the valve by the lifting port according to the water level. An automatic water level control valve and a boiler with the same are provided.

Automatic level control valve according to the present invention for achieving the above object is a water inlet is formed on one side, the valve body formed with a water outlet on the other side; A valve assembly installed at an inlet side of the water outlet and having a water inlet hole; A water discharge hole for discharging water introduced through the water inlet hole of the valve assembly is formed, and a water inlet side space opposite to the valve assembly is generated to generate a water pressure difference so that the valve assembly opens and closes the water outlet. And a float assembly installed inside the expansion tank to open and close the water discharge hole of the tube according to the level of the expansion tank.

The float assembly is a float which is elevated according to the water level, the lever is installed on one side to rotate around the rotation axis formed adjacent to the water discharge hole of the tube, and the other side of the lever is provided on the other side of the water discharge of the tube It is preferable to include a disc packing for opening and closing the ball.

It is preferable that the diameter of the water discharge hole of the tube is equal to or larger than the diameter of the water inlet hole of the valve assembly.

In addition, in the boiler having an automatic water level control valve for a boiler according to the present invention, an expansion tank is connected to a heat exchanger installed in a boiler casing, and a circulation pump is connected to the expansion tank by a water circulation pipe. A valve body having a water inlet connected to the water circulation pipe at one side thereof and having a water discharge port opened into the expansion tank at the other side thereof; A valve assembly installed at an inlet side of the water outlet and having a water inlet hole; A water discharge hole is formed through which the water introduced through the water inlet hole of the valve assembly is discharged, and a water pressure difference is generated from an opposite side of the valve assembly to form an operation space for operating the valve assembly to open and close the water outlet. And a float assembly installed inside the expansion tank to open and close the water discharge hole of the tube according to the level of the expansion tank.

The valve assembly is preferably composed of a diaphragm sheet formed with a diaphragm formed with a water inlet hole on one side, and a water inlet hole coupled to the upper surface of the diaphragm and corresponding to the water inlet hole of the diaphragm.

The float assembly is provided with a float which is elevated in accordance with the level of the expansion tank, the float is installed on one side and rotates around a rotation axis formed adjacent to the water discharge hole of the tube, and the other side of the lever is provided It is preferable to include a disk packing for opening and closing the water discharge hole of the tube.

It is preferable that the diameter of the water discharge hole of the tube is equal to or larger than that of the water inlet hole of the valve assembly.

It is preferable that a filter is further provided on the flow path of the water inlet of the valve body.

Hereinafter, the automatic level control valve according to the present invention as described above will be described in more detail with an example of a boiler in which a valve is installed.

1 is a cross-sectional view of a boiler having an automatic water level control valve according to an embodiment of the present invention.

An expansion tank 3 is connected to the heat exchanger 2 installed inside the boiler casing 1, and a circulation pump 4 is connected to the expansion tank 3 so that water is detected through a water circulation pipe. It is configured to supply.

In addition, the water supply pipe (5) connected to the expansion tank (3) is provided with an automatic water level control valve (10) for automatically replenishing water by opening and closing the water supply pipe (5) in accordance with the level of the expansion tank (3). .

As shown in FIG. 2, which is a cross-sectional view taken along line II-II of FIG. 1, the automatic water level control valve 10 has a water inlet 12 to which the water supply pipe 5 is connected. On the other side of the valve body 11, a water discharge port 13 through which the water introduced through the water inlet 12 is discharged is formed. At this time, the water inlet 12 is installed to be exposed to the outside of the expansion tank 3, the water outlet 13 is opened to the inside of the expansion tank (3) to open the water outlet (13) Water discharged through is supplied to the expansion tank (3).

The valve assembly 14 is installed in the flow path of the water outlet 13 to open and close the water outlet 13 by being operated by the water pressure of the inflowing water, and the valve assembly 14 is located above the valve assembly 14. The tube 15 is fixed to both ends of the valve to the valve body 11, the tube 15 is coupled to the valve body 11 by a ring nut (16).

The valve assembly 14 is composed of a diaphragm 14a having a water inlet hole 14a-1 formed at one side thereof, and a diaphragm seat 14b coupled to and coupled to an upper surface of the diaphragm 14a. On one side of the diaphragm sheet 14b, a water inlet hole 14b-1 corresponding to the water inlet hole 14a-1 of the diaphragm 14a is formed.

The space between the valve assembly 14 and the tube 15 forms an operating space A in which the valve assembly 14 opens and closes the inlet of the water outlet 13, and the valve The space B on the water inlet 12 side to the outside of the assembly 14 becomes a space for forming the water pressure of the water introduced in contrast to the working space A.

A conical protrusion 15a is formed at the center of the tube 15, and a water discharge hole 15a-1 penetrating the protrusion 15a is formed. Wherein the diameter of the water discharge hole (15a-1) is formed to the same diameter as the size of the diameter of the water inlet hole (14a-1), 14b-1 of the valve assembly 14, or is formed larger. This is because the pressure decrease in the working space A when the water discharge hole 15a-1 of the tube 15 is opened is introduced through the water inlet holes 14a-1 and 14b-1 of the valve assembly 14. This is because the valve assembly 14 smoothly opens the inlet of the water outlet 13 only when it is greater than the increase in the water pressure.

On the flow path of the water inlet 12, a filter 17 is installed on the other side of the valve assembly 14 in the drawing, and the valve body 11 is provided by a filter fixing port 19 which is airtightly installed by the O-ring 18. It is fixedly installed.

The lever 22 is rotatably coupled around the rotation shaft 23 at a position adjacent to the protruding portion 15a of the tube 15 so that one end of the lever 22 is in accordance with the level of the expansion tank 3. A floating float 21 is provided, and at the other end of the lever 22, a disk packing 24 for opening and closing the water discharge hole 15a-1 formed in the protrusion 15a of the tube 15 is provided. have.

According to the present invention configured as described above will be described the action that the water supplement to the expansion tank of the boiler.

3 is a cross-sectional view showing the flow of water in the valve closed state, Figure 4 is a cross-sectional view showing the flow of water in the valve open state.

As shown in FIG. 3, in the state where the water in the expansion tank 3 is sufficiently stored, the float 21 is raised, so that the disc packing 24 of the lever 22 discharges the water of the tube 15. The ball 15a-1 is shielded. At this time, the water introduced through the water inlet hole (14a-1) (14b-1) of the valve assembly 14 is stored in the working space (A), the internal pressure of the working space (A) is In the working space A, the valve assembly 14 is in the right direction in the drawing, that is, the inlet of the water outlet 13 because it is larger than the pressure of the space B on the water inlet 12 side, which is the outer space of the valve assembly 14. The valve assembly 14 is moved in the direction of blocking the portion to block the flow path of the water outlet (13).

Thus, the expansion tank acting on the working space A by the float 21 rather than the water pressure acting on the space B on the water inlet 12 in the state in which the valve assembly 14 blocks the flow path of the water outlet 13. (3) Since the pressure inside the water is greater, the valve assembly 14 maintains the state of blocking the flow path of the water discharge port 13 stably. Therefore, the water is no longer supplied to the inside of the expansion tank (3) through the water outlet (13).

On the contrary, when the level of the expansion tank 3 is lowered, as shown in FIG. 4, while the float 21 is lowered, the lever 22 is rotated about the rotating shaft 23 and the disk packing 24 is provided. ) Opens the water discharge hole 15a-1 of the tube 15. Therefore, the water stored in the working space (A) is discharged through the water discharge hole (15a-1) while the internal pressure of the working space (A) is reduced, the pressure of the space (B) side of the water inlet 12 The valve assembly 14 is moved to the right side in the drawing from the time when the pressure is greater than the pressure of the working space A, and the flow path of the inlet of the water outlet 13 is opened.

When the flow path of the water outlet 13 is opened in this way, the water supplied through the water supply pipe 5 is supplied from the water inlet 12 to the inside of the expansion tank 3 via the water outlet 13. At this time, since the internal pressure of the working space A is smaller than the pressure of the space B on the water inlet 12 side, the valve assembly 14 stably opens the flow path of the water outlet 13. The water is continuously supplied into the expansion tank 13 until the internal level of the expansion tank 3 reaches the normal level.

When the expansion tank 3 reaches the normal water level, the float 21 is raised by buoyancy so that the disk packing 24 shields the water discharge hole 15a-1 of the tube 15. As described above, the valve assembly 14 blocks the flow path of the water outlet 13, and no more water is supplied into the expansion tank 3 through the water outlet 13.

As described above, the boiler having the automatic water level control valve according to the present invention is installed in the water supply pipe without the water level control valve on the path of the heating water circulation pipe to perform the water level control function regardless of the power outage, It does not need the check function when water is cut off, and it is easy to repair when maintenance is maintained, and the serviceability is remarkably improved. In addition, when the water level control valve is replaced, water in the pipe is not drained. There is an effect to be improved.

In addition, compared to the electronic water supply valve using a solenoid coil, the present invention can eliminate various parts such as part of the controller and supply side piping, thereby reducing the manufacturing part cost.

And the present invention has the advantage that can automatically perform only the water replenishment function according to the level of the expansion tank irrespective of the low water level function linked to the operation of the burner and the circulation pump of the boiler.

Claims (8)

A water inlet is formed at one side and a water outlet is formed at the other side; A valve assembly installed at an inlet side of the water outlet and having a water inlet hole; A water discharge hole for discharging water introduced through the water inlet hole of the valve assembly is formed, and a water inlet side space opposite to the valve assembly is generated to generate a water pressure difference so that the valve assembly opens and closes the water outlet. A tube forming an operating space; and And a float assembly installed inside the expansion tank to open and close the water discharge hole of the tube according to the level of the expansion tank. The method of claim 1, The float assembly Float which is elevated according to the water level, the float is installed on one side and rotates around the rotation axis formed adjacent to the water discharge hole of the tube, and provided on the other side of the lever to open and close the water discharge hole of the tube Automatic level control valve comprising a disk packing.  The method of claim 1, Automatic water level control valve, characterized in that the diameter of the water discharge hole of the tube is greater than or equal to the diameter of the water inlet hole of the valve assembly. In a boiler in which an expansion tank is connected to a heat exchanger installed inside a boiler casing, and a circulation pump is connected to the expansion tank by a water circulation pipe. A valve body having a water inlet connected to the water supply pipe at one side thereof, and a water discharge port opened at the other side of the expansion tank; A valve assembly installed at an inlet side of the water outlet and having a water inlet hole; A water discharge hole for discharging water introduced through the water inlet hole of the valve assembly is formed, and a water inlet side space opposite to the valve assembly is generated to generate a water pressure difference so that the valve assembly opens and closes the water outlet. A tube forming an operating space; and And a float assembly installed inside the expansion tank, the float assembly opening and closing the water discharge hole of the tube according to the level of the expansion tank. The method of claim 4, wherein The valve assembly is A boiler having an automatic water level control valve, comprising a diaphragm having a water inlet hole formed at one side thereof, and a diaphragm sheet coupled to and coupled to an upper surface of the diaphragm and having a water inlet hole corresponding to the water inlet hole of the diaphragm.  The method of claim 4, wherein The float assembly Float which is raised and lowered according to the level of the expansion tank, the float is installed on one side and rotates around a rotating shaft formed adjacent to the water discharge hole of the tube, and the other side of the lever is provided on the water discharge of the tube Boiler equipped with an automatic water level control valve, characterized in that it comprises a disk packing for opening and closing the ball. The method of claim 4, wherein The boiler with an automatic water level control valve, characterized in that the diameter of the water discharge hole of the tube is greater than or equal to the diameter of the water inlet hole of the valve assembly. The method of claim 4, wherein The boiler with an automatic water level control valve, characterized in that the filter is further installed on the flow path of the water inlet of the valve body.

Images