KR200309162Y1 - 3-way valve have sealing plate - Google Patents

Abstract

The present invention relates to a three-way flow path switching valve having a sealing plate, the purpose is to improve the through-hole of the sealing plate through which the drive shaft penetrates to prevent the O-ring damage.

To this end, according to the three-way flow path switching valve having a sealed plate according to the present invention, the drive shaft 40 for directly driving the flow path switching member 20 is disposed through the through hole 34 of the sealed plate 30 Here, a metal bush 60 having a seal 62 is forcibly press-fitted in order to prevent frictional damage with the drive shaft 40 O-ring 45. Accordingly, frictional damage of the inner wall of the through hole 34 and the driving shaft 40 of the O-ring 45 of the sealing plate 30 is prevented, thereby improving durability and product reliability of the driving ring 40 of the O-ring 45. It works.

Description

3-way flow path switching valve with hermetic plate {3-WAY VALVE HAVE SEALING PLATE}

The present invention relates to a three-way flow path switching valve, and more particularly, to a three-way flow path switching valve having a sealing plate that is mounted to seal the opening of the flow path switching chamber and the drive shaft penetrates the central portion thereof.

In general, the three-way flow path switching valve is a drive shaft directly connected to the motor rotates the switching member in accordance with the switch signal, which causes the outlet port to be selectively opened and closed. The utility model registration application (Application No. 20-2001-0022016) is registered on October 14, 2001 (Registration No. 20-0250690).

As shown in FIGS. 1 and 2, the 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 outlet ports 1b and 1c communicating with each other. The valve body 1 in which the flow path switching chamber 1d is opened upward, the drive motor 2 disposed above the valve body 1, the motor shaft 2a and the drive shaft of the drive motor 2. (3) is coupled so as to interlock in a straight line 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 (1) The switch ball (4) and the valve body (1) for guiding the fluid introduced into the flow path switching chamber (1d) of the c) through the three-way communication hole (4a) and selectively discharged through the discharge ports (1b) (1c). An elastic packing 5 fixedly coupled to the flow path switching chamber 1d of the valve body 1 to maintain airtightness between the discharge ports 1b and 1c and the switching ball 4, 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 rotating with the elastic packing 5, the driving motor 2 and An installation plate 7 which is coupled to the motor shaft 2a and fixedly coupled to an upper surface of the valve body 1 so that the drive shaft 3 is supported, and is installed between the installation plate 7 and the drive motor 2. The contact switch means 8 which controls the power supply of the drive motor 2 and the rotation direction of the drive shaft 3 is provided.

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. In addition, the center part of the sealing plate 6 is formed so that the rotation fitting hole 6c through which the drive shaft 3 is rotatably fitted. Further, a ring insertion hole 3a into which the rubber ring 3b is inserted is formed in the outer circumference of the drive shaft 3 penetrating the rotation fitting hole 6c. That is, the rubber ring 3b is squeezed between the rotational fitting hole 6c and the drive shaft 3, thereby preventing water leakage.

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 for a long time use, the inner circumference of the rotation fitting hole 6c through which the drive shaft 3 penetrates is frictionally damaged, and thus, the rubber ring 3b made of elastic material is also more easily damaged. have. That is, since the sealing plate 6, in which the rotation fitting hole 6c is formed, is usually formed through a synthetic resin, wear resistance due to continuous friction with the rubber ring 3b is weak. For this reason, the durability of the rubber ring 3b is also lowered, which causes leakage of water between the drive shaft 3 and the rotation fitting hole 6c.

The present invention is to solve this problem, the object of the present invention is to install a metal bush in the center of the sealing plate through which the drive shaft rotatably provided with a sealing plate that can prevent damage to the O-ring disposed on the outer periphery of the drive shaft It is to provide a three-way flow path switching valve.

In addition, another object of the present invention is to provide a three-way flow path switching valve having a sealing plate that can easily and reliably install the metal bush in the center of the sealing plate.

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 according to the present invention.

Figure 4 is an exploded perspective view showing the arrangement of the sealing plate and the drive shaft according to the present invention.

5 is a cross-sectional view taken along the line VV of FIG. 4.

Figure 6 shows the operating state of the three-way flow path switching valve according to the present invention.

Figure 7 shows another embodiment of the present invention.

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

10. Valve housing 20. Euro conversion member

30. Sealed plate 34. Through hole

40. Drive shaft 45. O-ring

60. Metal bush 61. Seal groove

62. Seal 63. Uneven surface

The present invention for achieving this object is;

A valve housing provided with two discharge ports opposed to the inflow port and having a flow path switching chamber communicating with the inflow ports; A flow path switching member rotatably installed in the flow path switching chamber of the valve housing to selectively communicate any one of the inflow port and the two discharge ports; A sealing plate coupled to the upper portion of the valve housing to seal the opening of the flow path switching chamber; A three-way flow path switching valve having a drive shaft provided with an O-ring to engage with a flow path switching member through a through hole formed in the center portion of the hermetic plate and to prevent leakage;

A metal bush is disposed in the through hole of the sealing plate to prevent frictional damage with the drive shaft O-ring;

The outer periphery of the central portion of the metal bush is characterized in that the seal of the elastic material is provided in the seal groove made of a band shape.

In addition, the outer circumference of the metal bush is characterized in that it is knurled in the axial direction is forcibly coupled to the through hole of the sealing plate.

In addition, the sealing plate is molded of synthetic resin;

The metal bush is characterized in that the insert is fixed to the central portion of the sealing plate.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. 3 to 5 show the structure of the three-way flow path switching valve according to the present invention. Figure 6 shows the operating state of the three-way flow path switching valve according to the present invention.

3, the three-way flow path switching valve according to the present invention is installed in a hot water pipe, such as a boiler to change the flow direction of heating or hot water, inlet port 11 and two discharge ports 12, 13 ) Is formed to face the valve housing 10 having a flow path switching chamber 14 for communicating with each other and the flow path switching chamber 14 of the valve housing 10 so as to be rotatable. A flow passage switching member 20 for selectively communicating two discharge ports 12 and 13, a sealing plate 30 coupled to an upper portion of the valve housing 10 to seal an opening of the flow passage switching chamber 14, and The drive shaft 40 penetrates the center portion of the hermetic plate 30 and is coupled to the flow path switching member 20, and the drive motor 50 for directly driving the drive shaft 40 is provided.

The valve housing 10 is formed of a plastic injection molding in which a flow path switching chamber 14 capable of fluid movement is opened upward, and an inflow port 11 through which fluid is introduced is connected to a bottom of the flow path switching chamber 14, and a flow path Both sides of the switching chamber 14 are provided so that the first discharge port 12 and the second discharge port 13 face each other so that the fluid can escape. In addition, a seating portion 15 is formed stepwise in the opening portion of the flow path switching chamber 14 so that the sealing portion 31 of the sealing plate 30 to be described later is seated and coupled.

In addition, the flow path switching member 20 is a kind of ball valve made of a steel sphere, and an outlet hole 21 formed in a horizontal direction and an inlet hole 22 formed perpendicular to the outlet hole 21 are provided. . The outlet hole 21 selectively communicates with any one of the first and second discharge ports 12 and 13 according to the rotation of the flow path switching member 20 by 180 degrees, and the inlet hole 22 is the inlet port 11. ) Is always in communication. In addition, the coupling hole 23 is formed on the upper portion of the flow path switching member 20 so that the lower end of the driving shaft 40 is fitted.

4 and 5, the sealing plate 30 is to seal the opening of the flow path switching chamber 14, in the present invention consists of a square plate made of synthetic resin, that is, plastic and four screws 32 Through solid assembly. A sealing portion 31 seated on the seating portion 15 of the flow path switching chamber 14 is formed on the bottom of the sealing plate 30, and the outer circumference of the sealing portion 31 has a ring-shaped seal (for sealing engagement). 33) is arranged. In addition, a through hole 34 is drilled in the central portion of the hermetic plate 30 so that the drive shaft 40 can be freely penetrated, and is connected to the upper portion of the flow path switching chamber 14.

And the drive shaft 40 is disposed through the through hole 34, the upper end 41 of which is coupled to the rotary shaft 51 and the pin 52 of the drive motor 50, the lower end 42 of the flow path switching member ( 20 is coupled to the coupling hole (23). To this end, a pinhole 43 is drilled in the upper end 41 of the drive shaft 40, and the lower surface 42 of the drive shaft 40 is fitted with a coupling hole 23 to have a key surface 44 to prevent idling. In addition, the O-ring 45 is disposed in two stages in the center of the drive shaft 40 to prevent leakage, and the O-ring seating groove of the second stage is disposed at the outer circumference of the central portion of the drive shaft 40 for the arrangement of the O-ring 45. 46) It consists of a strip shape.

On the other hand, the cylindrical shaft bush 60 is forcibly coupled to the through hole 34 of the sealing plate 30 through which the drive shaft 40 penetrates in order to prevent frictional damage with the O-ring 45 of the drive shaft 40. It is. In the embodiment of the present invention the bush 60 was made of brass. Therefore, the O-ring 45 disposed on the drive shaft 40 is maintained in close contact with the inner circumference of the metal bush 60, the detailed installation structure thereof is as follows.

First, the diameter D1 of the metal bush 60 is configured to be slightly larger than the diameter D2 of the through hole 34 of the sealing plate 30 (D1> D2), and the sealing groove ( 61) It consists of a band. In addition, the sealing groove 61 is provided with an elastic material seal 62 to be in close contact with the inner wall of the through hole 34 to prevent the occurrence of leakage. In addition, the outer circumference of the metal bush 60 is knurling and is axially formed on the uneven surface 63.

Therefore, when the metal bush 60 is forcibly inserted into the through hole 34, the seal 62 is pressed against the inner wall of the through hole 34 to prevent the occurrence of leaks, and at the same time, the metal bush 60 of the sealing plate 30 is closed. It stays firmly assembled at the central part.

Next, the operation of the three-way flow path switching valve according to the present invention configured as described above and the effects thereof will be described.

First, in FIG. 3, the driving shaft 40 is rotated integrally with the flow path switching member 20 by the operation of the driving motor 50, whereby the first discharge port 12 and the outlet hole 21 communicate with each other. It is in a state. In this state, the communication between the second discharge port 13 and the outlet hole 21 is blocked, so that the fluid flowing through the inlet port 11 flows into the inlet hole 22 of the flow path switching member 20. (21) exit through the first discharge port (12).

On the other hand, when the drive motor 50 to change the flow of the fluid to drive as follows. First, when a user drives the driving motor 50 through a control panel (not shown), the driving shaft 40 and the flow path switching member 20 together with the rotating shaft 51 rotate in one direction. At this time, the flow path switching member 20 rotates 180 degrees in the flow path switching chamber 14 because the driving motor 50 is once stopped by the switching means (not shown).

Therefore, as shown in FIG. 6, while the second discharge port 13 and the outlet hole 21 communicate with each other, the communication between the first discharge port 12 and the outlet hole 21 is blocked. As a result, the fluid flowing through the inlet port 11 exits through the inlet hole 22, the outlet hole 21, and the second outlet port 13 of the flow path switching member 20.

Since the drive shaft 40 for rotating the flow path switching member 20 rotates in the metal bush 60, damage to the O-ring 45 of the drive shaft 40 is prevented, and the sealing between them is maintained firmly. do.

That is, since the two-stage O-ring 45 made of an elastic material rotates while rubbing with the inner wall of the metal bush 60 when the driving shaft 40 is rotated due to the driving of the driving motor 50, damage due to mutual friction is caused. Is not generated, and thereby durability of the drive shaft 40 and the O-ring 45 is secured. As a result, the occurrence of leakage between the drive shaft 40 and the metal bush 60 is prevented, and between the through hole 34 and the metal bush 60 is kept in a sealed state by the seal ring 62 of the O-ring type. .

On the other hand, this technical idea has been described as forcibly coupling the metal bush 60 with the seal 62 to the through hole 34, but not limited to this, as shown in FIG. 7, the metal bush 60 is sealed. Of course, even if the insert (fixed) in the central portion of the plate 30 can achieve the desired purpose of the present invention.

That is, in the injection molding of the sealing plate 30 through the synthetic resin, the metal bush 60 having the seal 62 is disposed in advance in the sealing plate injection mold (not shown). In addition, the metal bush 60 is insert-fixed to the central portion of the hermetic plate 60 by injecting a synthetic resin in a molten state into the hermetic mold injection mold in which the metal bush 60 is disposed. At this time, the synthetic resin is usually around 250 ℃ melting while the fluorine or silicon-based seal 62 is 300 ℃ or more, so that even if the insert molding the seal 62 with the metal bush 60 is not damaged.

Accordingly, when the metal bush 60 is firmly inserted and fixed to the central portion thereof during the manufacture of the sealing plate 30, the manufacturing of the sealing plate 30 can be more easily performed, thereby reducing manufacturing costs.

As described in detail above; According to the three-way flow path switching valve having a sealed plate according to the present invention, the drive shaft for directly driving the flow path switching member is disposed through the through-hole of the sealed plate, there is a seal to prevent friction damage with the drive shaft O-ring The metal bush with fitting is fitted. Accordingly, the frictional damage of the inner wall of the through-hole and the drive shaft O-ring of the sealing plate is prevented, thereby improving the durability and product reliability of the drive shaft O-ring.

Claims (3)

Two discharge ports 12 and 13 opposed to the inflow port 11 are provided, and a valve housing 10 formed so that the flow path switching chamber 14 communicating with them is opened upward; A flow path switching member 20 rotatably installed in the flow path switching chamber 14 of the valve housing 10 to selectively communicate any one of the inflow port 11 and the two discharge ports 12 and 13; ; A sealing plate 30 coupled to the upper portion of the valve housing 10 to seal the opening of the flow path switching chamber 14; Three-way flow path switching is provided with a drive shaft 40 is provided with an O-ring 45 to penetrate through the through hole 34 formed in the center portion of the sealing plate 30 to be coupled to the flow path switching member 20 and to prevent leakage In a valve; A metal bush (60) is disposed in the through hole (34) of the sealing plate (30) to prevent frictional damage with the drive shaft (40) or the o-ring (45); The three-way flow path switching valve with a sealing plate, characterized in that the seal 62 of the elastic material is provided in the seal groove (61) made of a band shape on the outer periphery of the central portion of the metal bush (60). The method of claim 1, The outer circumference of the metal bush 60 is knurl processed in the axial direction is forcibly coupled to the through hole 34 of the sealing plate 30, three-way flow path switching valve having a sealing plate. The method of claim 1, The hermetic plate 30 is molded of synthetic resin; The metal bush (60) is a flow path switching valve, characterized in that the insert is fixed to the central portion of the hermetic plate (30).