KR20050001716A - 3-way valve for boiler - Google Patents

Abstract

PURPOSE: A three-way passage switch valve for a boiler is provided to switch a passage by opening and closing selectively first and second discharge ports by moving up and down a valve member in a passage switch chamber according to power-supply of a solenoid assembly. CONSTITUTION: A three-way passage switch valve for a boiler is composed of a valve housing(10) having an inlet port(11), first and second discharge ports(12,13) facing each other, and a passage switch chamber(14) communicating with the inlet port and the first and second discharge ports; a valve member(20) disposed in the passage switch chamber of the valve housing to move rectilinearly and vertically and to communicate selectively the inlet port with one of the first and second discharge ports; an armature rod(30) connected rectilinearly with the valve member with penetrating the first discharge port arranged at the upside to drive the valve member and moved downward by self-weight; and a solenoid assembly(40) installed at the upper part of the valve housing to move upward the valve member together with the armature rod according to an electrical signal.

Description

3-way directional valve for boiler {3-WAY VALVE FOR BOILER}

The present invention relates to a three-way flow path switching valve for a boiler, and more particularly to a three-way flow path switching valve for a boiler for operating the flow path switching member through a solenoid.

In general, a boiler is divided into a heating conduit for heating water by burning fuel and heating the heated water while circulating a predetermined heating zone, and a hot water conduit for tapping hot water. Heating water is circulated in the heating pipe by the operation of the circulation pump. At this time, the heating water is heated in the main heat exchanger through the burner in the circulation process and is supplied to the three-way flow path switching valve side, and the heating water passing through the three-way flow path switching valve passes through the heating coil to perform substantial heating function. Return through return piping. In addition, the hot water pipe is configured so that the direct water (tap water) flowing through the hot water pipe passes through the inside of the hot water heat exchanger.

One of the components of the boiler, the three-way flow path switching valve is a drive shaft directly connected to the motor rotates the switching member in response to the switch signal, thereby causing the outlet port to be selectively opened and closed, one of them as of July 20, 2001 A three-way flow path switching valve has been filed a utility model registration application (Application No. 20-2001-0022016) and registered on October 14, 2001 (Registration No. 20-0250690).

As shown in FIGS. 1 and 2, the conventional three-way flow path switching valve disclosed in Korean Utility Model Registration No. 20-0250690 is provided with an inlet port 1a and a plurality of discharge ports 1b and 1c communicating therein. And the valve body 1 having the flow path switching chamber 1d open upward, the drive motor 2 disposed above the valve body 1, the motor shaft 2a of the drive motor 2, It is coupled so as to be interlocked in a straight line by the drive shaft (3) is disposed so as to rotate in the flow path switching chamber (1d) of the valve body 1 and the three-way communication hole (4a) is formed in the three-way communication inside the valve body ( Switching ball (4) and the valve body (1) for guiding the fluid flowing into the flow path switching chamber (1d) of 1) selectively discharged through the three-way communication hole (4a) through the discharge port (1b) (1c) Elastic packing fixedly coupled to the flow path switching chamber 1d of the valve body 1 to maintain the airtightness between the discharge ports 1b and 1c and the switching ball 4 (5), a sealing plate (6) coupled to seal the flow path switching chamber (1d) of the valve body (1) and supporting the switching ball (4) and the drive shaft (3) rotated with the elastic packing (5), and driving An installation plate 7 which is coupled to the motor 2 and the motor shaft 2a and fixedly coupled to an upper surface of the valve body 1 so that the drive shaft 3 is supported, the installation plate 7 and the drive motor 2; It is installed between and has a contact switch means (8) for controlling the rotation direction of the power source and the drive shaft (3) of the drive motor (2).

The sealing plate 6 is formed with a ring fitting hole 6a so that the sealing ring 6b is fitted along the edge to seal the upper portion of the flow path switching chamber 1d of the valve body 1.

Therefore, since the communication direction of the three-way communication hole 4a is switched while the switching ball 4 rotates together with the drive shaft 3 by the drive motor 2, it flows into the flow path switching chamber 1d of the valve body 1. The discharged fluid is selectively discharged through one of the two discharge ports 1b and 1c through the three-way communication hole 4a.

However, in the conventional three-way flow path switching valve, the structure for rotating the switching ball 4 through the rotational force of the driving motor 2 and the structure of the switching ball 4 in which the three-way communication hole 4a is formed are complicated. Of course, there is a problem that the control is also made difficult. In addition, due to such a complicated configuration, the failure rate is high and the manufacturing cost is also a significant disadvantage.

The present invention is to solve this problem, the object of the present invention is to linearly move the valve member in both directions to selectively open and close both outlets to configure their operation structure more compact and at the same time reduce the manufacturing cost It is to provide a three-way flow path switching valve for the boiler.

1 is an exploded perspective view showing the overall structure of a conventional three-way flow path switching valve.

Figure 2 is a cross-sectional view showing the internal structure of a conventional three-way flow path switching valve.

3 is a cross-sectional view showing the internal structure of the three-way flow path switching valve for a boiler according to the first embodiment of the present invention.

4 and 5 show the operating state of the three-way flow path switching valve for the boiler according to the first embodiment of the present invention.

Figure 6 shows a three-way flow path switching valve for a boiler according to a second embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10. Valve housing 11.Inflow port

12,13.Exhaust port 14.Euro switching room

15. Guide bulkhead 20. Valve member

30. Amateur rod 40. Solenoid assembly

42. Elastic member

The present invention for achieving this object is; In the 3-way flow path switching valve for boiler,

The three-way flow path switching valve is provided with first and second discharge ports opposed to the inflow port and has a valve housing in which a flow path switching chamber is formed so as to communicate with them, and a linear movement can be performed vertically in the flow path switching chamber of the valve housing. The valve member which is arranged in such a manner as to selectively communicate one of the first and second discharge ports with the inlet port, and is connected in a straight line with the valve member through the first discharge port provided on the upper side to drive the valve member. And a solenoid assembly installed on an upper portion of the valve housing to move the valve member upward with the armature rod in accordance with an electrical signal.

In addition, the flow path switching chamber of the valve housing is installed on the side opposite to the inflow port to guide the vertical movement of the valve member and at the same time the guide partition wall for guiding the fluid flowing through the inlet port to the first discharge port or the second discharge port side. Characterized in that provided.

In addition, the solenoid assembly is characterized in that the elastic member for elastically supporting the armature rod to the lower side.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

3, the three-way flow path switching valve according to the first embodiment of the present invention is installed in a hot water pipe such as a boiler to change the flow direction of heating or hot water supply, the inlet port 11 and the first, first, Two discharge ports 12 and 13 are formed to face up and down, and the valve housing 10 having a flow path switching chamber 14 for communicating them therebetween and up and down in the flow path switching chamber 14 of the valve housing 10. A valve member 20 arranged to be linearly movable to selectively communicate any one of the first and second discharge ports 12 and 13 with the inlet port 11, and to operate the valve member 20. The armature rod 30 connected to the valve member 20 in a straight line through the first discharge port 12 formed at the upper side thereof, and the valve housing 10 to move the armature rod 30 upward in accordance with an electrical signal. Is equipped with a solenoid assembly 40 disposed on top.

The valve housing 10 is formed of a plastic injection molding formed therein with a flow path switching chamber 14 capable of fluid movement, and an inflow port 11 through which fluid is introduced is provided at a side of the flow path switching chamber 14, and the flow path switching chamber 14 is provided. The first discharge port 12 and the second discharge port 13 are provided to face each other so that the fluid flows out above and below.

Further, a guide partition wall 15 is placed in the flow path switching chamber 14 to guide the vertical movement of the valve member 20 on the side opposite to the inflow port 11. The guide partition wall 15 is formed integrally with the valve housing 10, and upper and lower communication passages 16 and 17 are formed at upper and lower portions thereof so as to communicate with upper and lower spaces of the flow path switching chamber 14. Accordingly, the valve member 20 may facilitate the vertical movement of the valve member 20 through the guide partition wall 15, and the fluid flowing through the inlet port 11 may be the first discharge port 12 or the second discharge port ( 13) will be guided directly to the side.

The valve member 20 is a kind of packing made of an elastic material, which is arranged to move upward and downward in the flow path switching chamber 14. Accordingly, when the valve member 20 moves upward, the first discharge port 12 formed on the upper side is closed. When the valve member 20 descends to the lower side, the second discharge port 13 formed on the lower side of the valve member 20 moves downward. Will be closed.

And the armature rod 30 is for operating the valve member 20, as described above, for this purpose, the lower end of the armature rod 30 passes through the first discharge port 12 and the valve member 20 and It is connected in a straight line, the upper end of which extends above the valve housing 10 and is received in the sleeve 41 of the solenoid assembly 40. In addition, the upper end of the armature rod 30 is elastically supported downward through the elastic member 42 (coil spring) in the sleeve 41 of the solenoid assembly 40. Accordingly, when the power supply to the solenoid assembly 40 is cut off, the valve member 20 together with the armature rod 30 moves downward by the elastic support force of the elastic member 42 and closes the second discharge port 13. Done. {The armature rod 30 and the valve member 20 are closed by their own weight, i.e., close the second discharge port 13 when the power supply to the solenoid assembly 40 is cut off even if it is not the elastic support force of the elastic member 42. Is moved in the direction of

On the other hand, the solenoid assembly 40 is a sleeve 41, the upper end of the armature rod 30 is vertically movable up and down, and arranged to surround the outside of the sleeve 41, the armature rod ( A coil for actuating 30 includes a solenoid 43 wound.

Next, the operation and effects of the three-way flow path switching valve for a boiler according to the first embodiment of the present invention configured as described above will be described with reference to FIGS. 4 and 5.

First, in FIG. 4, power is not applied to the solenoid assembly 40, and the armature rod 30 is moved downward by the elastic member 42 and its own weight. Therefore, the valve member 20 is moved downward with the armature rod 30 in the flow path switching chamber 14 as much as possible. As a result, the second discharge port 13 below the flow path switching chamber 14 is closed. (11) and the first discharge port 12 are in communication with each other.

In this state, as the circulation pump (not shown) of the boiler system is driven, the fluid flows into the flow path switching chamber 14 through the inlet port 11 and then exits through the first discharge port 12 (arrow direction). Reference). At this time, the fluid flowing through the inlet port 11 is guided to the first discharge port 12 side through the upper communication passage 16 of the guide partition wall 15, the fluid flow is more smoothly. In addition, a static pressure acts on the valve member 20 while the fluid is directly guided to the first discharge port 12 side, which causes the valve member 20 to closely contact the second discharge port 13. It remains closed.

On the other hand, when the solenoid assembly 40 is to be driven to change the flow of the fluid as follows. First, the user stops the driving of the circulation pump through the boiler control panel (not shown), so that the pressure on the upper and lower sides of the valve member 20 is constant.

When the power is applied to the solenoid assembly 40, as shown in FIG. 5, the armature rod 30 rises upward while the elastic force of the elastic member 42 is overcome by the electromagnetic force generated by the solenoid 43. . At this time, the valve member 20 also goes upward while being guided through the guide partition wall 15 in the flow path switching chamber 14 together with the armature rod 30, so that the first discharge port 11 is closed while inflow. The port 11 and the second discharge port 13 communicate with each other.

In this state, when the circulating pump of the boiler system is driven, the fluid flows into the flow path switching chamber 14 through the inlet port 11 and continues through the second discharge port 13 (see arrow direction in FIG. 5). ). At this time, the fluid flowing through the inlet port 11 is guided to the second discharge port 13 side through the lower communication passage 17 of the guide partition wall 15, the fluid flow is more smoothly. In addition, since the fluid is directly guided to the second discharge port 13 side, a positive pressure acts on the valve member 20 side, which causes the valve member 20 to keep the first discharge port 12 more closely closed. do.

Meanwhile, in the first embodiment of the present invention, an elastic member for elastically supporting the armature rod is disposed on the sleeve of the solenoid assembly as an example. As shown in FIG. 6, the sleeve 41 of the solenoid assembly 40 is illustrated. Even if the elastic member is removed from the desired object of the present invention can be achieved.

That is, in the three-way flow path switching valve according to the second embodiment of the present invention, the armature rod 30 is installed in the sleeve 41 of the solenoid assembly 40 so as to directly move up and down. Therefore, when the circulation pump of the boiler system is stopped and the power supply to the solenoid assembly 40 is cut off, the pressure is constant on the upper and lower sides of the valve member 20. For this reason, the valve member 20 with the armature rod 30 moves downward in the flow path switching chamber 14 by its own weight, and covers the 2nd discharge port 13. In this state, when the circulation pump is driven again and the fluid is introduced, a positive pressure acts on the valve member 20, so that the valve member 20 is maintained in a state in which the second discharge port 13 is in close contact.

On the other hand, when power is applied to the solenoid assembly 40, the valve member 20 moves upward with the armature rod 30 to close the first discharge port 12.

As described in detail above; According to the three-way flow path switching valve for a boiler according to the present invention, according to whether the power supply of the solenoid assembly, the valve member is moved up and down inside the flow path switching chamber while switching the flow path while selectively opening and closing the first and second discharge port. Accordingly, the operation structure of the valve member is made more compact, as well as the components are simple, there is an advantage that can reduce the manufacturing cost. In addition, there is an effect that the operation of the valve member is more accurate by the guide partition wall formed in the flow path switching chamber.

Claims (3)

A three-way flow path switching valve for a boiler; The three-way flow path switching valve, First and second discharge ports 12 and 13 opposed to the inflow port 11 are provided, and a valve housing 10 having a flow path switching chamber 14 formed therein to communicate with them; It is arranged to move linearly up and down in the flow path switching chamber 14 of the valve housing 10 to selectively communicate any one of the first and second discharge port 12, 13 and the inlet port 11. To the valve member 20, An armature rod 30 connected to the valve member 20 in a straight line through the first discharge port 12 provided at the upper side to drive the valve member 20 and moved downward by its own weight; Three-way boiler, characterized in that it comprises a solenoid assembly 40 installed on top of the valve housing 10 to move the valve member 20 with the armature rod 30 in accordance with an electrical signal. Flow path switching valve. The method of claim 1, The flow path switching chamber 14 of the valve housing 10 is installed on the side opposite to the inflow port 11 to guide the vertical movement of the valve member 20 and flow in through the inflow port 11. A three-way flow path switching valve for a boiler, characterized in that a guide partition wall (15) for guiding fluid to the first discharge port (12) or the second discharge port (13) side is provided. The method of claim 1, The solenoid assembly 40 is a three-way flow path switching valve for a boiler, characterized in that the elastic member 42 for elastically supporting the armature rod (30) to the lower side is provided.