WO2013032186A1

WO2013032186A1 - Three-way valve

Info

Publication number: WO2013032186A1
Application number: PCT/KR2012/006782
Authority: WO
Inventors: 민태식
Original assignee: 주식회사 경동나비엔
Priority date: 2011-08-26
Filing date: 2012-08-24
Publication date: 2013-03-07
Also published as: KR101303125B1; KR20130022809A

Abstract

The present invention relates to a three-way valve which minimizes a pressure variation between the front and rear sides of a plunger when a fluid supply path is switched, thereby preventing noise and vibration caused by water hammering. To this end, the three-way valve comprises: a valve body (210) having an inlet (201), a first outlet (202), and a second outlet (203); a rotor (270) coupled to a driving shaft (291) of a driving part (290) and rotated at a fixed height; and a vertical movement hole (260) through which one end of the shaft (240) coupled to the plunger (250) passes, wherein the vertical movement hole receives the rotational force of the rotor (270) to be vertically reciprocated together with the shaft (240) and the plunger (250). The plunger (250) may be vertically reciprocated between a first valve sheet (211) formed in the first outlet (202) and a second valve sheet (231) horizontally installed between the inlet (201) and the second outlet (203). Here, when the plunger is moved toward the first valve sheet (211), the movement speed of the plunger may be gradually decreased, and when the plunger is moved toward the second valve sheet (231), the movement speed of the plunger may be gradually increased.

Description

Three way valve

The present invention relates to a three-way valve for selectively switching the supply flow path of the fluid so that the fluid introduced into the inlet is supplied to one of the two outlets, more specifically, before and after the plunger at the time of switching to the supply flow of the fluid. It relates to a three-way valve made of a structure that can prevent the generation of noise and vibration due to water hammering caused by the pressure difference.

In general, a three-way valve has one inlet and two outlets formed in three directions in the valve body, and is used to selectively switch the supply flow path of the fluid introduced into the inlet to one of the two outlets as the plunger moves. Device.

1 and 2 are cross-sectional views showing the structure and operation of the conventional three-way valve.

Conventional three-way valve 100 is provided with a piston-type plunger 140 inside the valve body 110 in which the inlet 101, the first outlet 102 and the second outlet 103 are formed in three directions, As a means for reciprocating the plunger 140 along the inside of the valve body 110, the upper side of the valve body 110, the drive cam 160 and the driven cam 170 and the drive cam 160 are installed in connection with each other. There is provided a driving unit 150 for rotating the upper cover 181 and the upper body 182 for accommodating the driving cam 160 and the driven cam 170 therein.

A first valve seat 111 is formed at the upper end of the first outlet 102 of the valve body 110 to reduce the inner diameter of the valve body 110, and between the inlet 101 and the second outlet 103. In the valve body 110, a second valve seat 112 is provided in a lateral direction.

The plunger 140 is installed to be movable up and down between the first valve seat 111 and the second valve seat 112, and as shown in FIG. 1, the plunger 140 is lifted and lowered to the second valve seat ( When in close contact with 112, fluid communication is established between the inlet 101 and the first outlet 102, and as shown in FIG. 2, when the plunger 140 descends to be in close contact with the first valve seat 111, the inlet ( Fluid communication is achieved between the 101 and the second outlet 103.

The shaft 130 is coupled to the central portion of the plunger 140, the shaft 130 is inserted into the valve body 110, and the guide member 120 is installed to guide the reciprocating motion of the plunger 140. have.

An upper end of the shaft 130 is axially coupled to the driven cam 170 to vertically reciprocate together along the guide rod 125 formed integrally with the guide member 120.

In addition, a spring 128 is interposed between the driven cam 170 and the guide member 120 so that the driven cam 170 is elastically supported toward the driving cam 160 so that the driving cam 160 and the driven cam 170 are connected to each other. Will remain intact.

The driving unit 150 is mounted on the upper case 181, and the driving shaft 151 of the driving unit 150 penetrates the upper case 181 to be coupled to the driving cam 160 to drive the driving shaft 150 when the driving unit 150 is driven. 151 and the drive cam 160 is rotated together.

The drive cam 160 and the driven cam 170 is installed to be in contact with each other, the driven cam 170 is made to linearly reciprocating up and down by the rotation of the drive cam 160 and the restoring force of the spring 128, the drive At the contact surface between the lower end of the cam 160 and the upper end of the driven cam 170, protrusions and recesses corresponding to each other are formed so that the driven cam 170 moves from the top dead center to the bottom dead center whenever the driving cam 160 is rotated by 90 °. Or it moves by one stroke from the bottom dead center to the top dead center.

And a switching means for controlling the operation of the drive unit 150 to stop in the state in which the plunger 140 is in close contact with the first valve seat 111 or the second valve seat 112 on the inner side of the upper body 182. The knob 192 may include a plurality of sensing protrusions 161 formed on the outer circumferential surface of the driving cam 160 at predetermined intervals in a rotational direction, and a knob 192 pressed by the sensing protrusions 161. When is pressed is provided a limit switch 190 to cut off the power.

For example, when the three-way valve 100 having the above configuration is installed in the boiler, the inlet 101 is connected to the main heat exchanger side of the boiler, and the first outlet 102 is connected to the heating water supply pipe. The second outlet 103 may be configured to be connected to the hot water supply heat exchanger side.

When the boiler is in the heating mode, as shown in FIG. 1, the plunger 140 is lifted by the elastic force of the spring 128 to be in close contact with the second valve seat 112, so that the heating water supplied from the main heat exchanger is After flowing through the inlet 101, it is supplied to the heating source through the first outlet 102.

On the other hand, when the boiler is in the hot water mode, as shown in FIG. 2, the plunger 140 is lowered by the power of the driving unit 150 to be in close contact with the first valve seat 111, thereby providing heating from the main heat exchanger. The water is introduced through the inlet 101 and then supplied to the hot water heat exchanger through the second outlet 103.

As such, when the boiler is switched from the heating mode to the hot water mode, the driving cam 160 is rotated by the power of the driving unit 150, and the driven cam 170 connected to the driving cam 160 is pressed down. The shaft 130 and the plunger 140 coupled thereto move toward the first valve seat 111, and the plunger 140 moves downward when the plunger 140 approaches the first valve seat 111. Water hammering occurs as the plunger 140 suddenly closes due to sudden fluctuations in the upper and lower pressures of), which causes severe noise and vibration.

The water hammering phenomenon is instantaneously changed so that the flow of the heating water connected to the inlet 101 and the first outlet 102 in the heating mode is connected to the inlet 101 and the second outlet 103 when the conversion to the hot water mode. When the driving cam 160 and the driven cam 170 is spaced apart by a sudden pressure difference exceeding the elastic force of the spring 128, when the water hammering occurs, severe noise and vibration occurs as well as Accordingly, there is a problem that the valve body 110 of the three-way valve is damaged, causing malfunction and shortening of the life of the three-way valve.

The present invention has been made to solve the above problems, by minimizing the pressure fluctuations before and after the plunger when switching to the supply flow of the fluid to a structure that can prevent the generation of noise and vibration caused by water hammering The purpose is to provide a three-way valve made.

Another object of the present invention is to provide a three-way valve that can be quickly converted to the supply oil while preventing water hammering when the fluid is switched to the supply flow.

Another object of the present invention is to reduce the number of parts inside the three-way valve provided to prevent the occurrence of water hammering, and to simplify the assembly structure between the parts.

The three-way valve of the present invention for achieving the above object, the first outlet 202 and the second outlet 203 by the plunger 250 to reciprocate up and down by receiving the power of the drive unit 290. In the three-way valve 200 to selectively open and close the supply flow path of the fluid introduced into the inlet 201 to any one of the first outlet 202 and the second outlet 203, the inlet 201 and A valve body 210 having a first outlet 202 and a second outlet 203 formed therein; A rotor 270 coupled to the drive shaft 291 of the drive unit 290 and rotating at a predetermined height; And one end of the shaft 240 coupled to the plunger 250 is fixed, and receives the rotational force of the rotor 270 to reciprocate up and down with the shaft 240 and the plunger 250. Shanghai donggu 260; and, the plunger 250 is between the first valve seat 211 and the inlet 201 and the second outlet 203 formed on the upper end of the first outlet (202) While reciprocating up and down between the second valve seat 231 installed in the horizontal direction, the movement speed is gradually reduced when moving toward the first valve seat 211 side, when moving toward the second valve seat 231 side It characterized in that the moving speed is gradually increased.

In this case, a groove 261 is formed on the outer surface of the Shanghai Dong-gu 260 at a 90 ° interval and connected to each other by a wave, and the inner surface of the rotor 270 is formed on the inner surface of the rotor 270. A protrusion 272 is inserted into the groove 261 and slides along the inner surface of the groove 261 when the rotor 270 rotates.

In addition, the protrusion 272 is provided at a position opposite to the inner surface of the rotor 270, the outer surface of the shangdong-dong 260 has a groove 261 and the step 262a and the shangdong-dong ( Is formed downward from the top of the 260 is a projection insertion groove 262 is formed to guide the projection 272 to be seated in the groove 261 when assembling between the shandong Dong 260 and the rotor 270 Can be configured.

In addition, when the protrusion 272 is located at the lowest point 261a of the groove 261, the plunger 250 closes the second outlet 203 to a top dead center opening the first outlet 202. And a bottom dead center for opening the second outlet 203 by closing the first outlet 202 when the protrusion 272 is positioned at the highest point 261b of the groove 261. It can be configured to be located in.

Further, a steep inclined portion 261c is formed in an area proximate to both sides of the lowest point 261a of the groove 261, and a mildly inclined portion 261d is formed in an area proximate to both sides of the highest point 261b of the groove 261. Can be configured.

In addition, the groove 261 may be configured to be gradually inclined gradually from the lowest point 261a to the highest point 261b.

According to the three-way valve according to the present invention, when the plunger descends to approach the first valve seat when switching from the heating mode to the hot water mode, the moving speed of the plunger is gradually reduced to minimize the pressure fluctuation before and after the plunger. Therefore, it is possible to effectively suppress the occurrence of the water hamber caused by the rapid pressure fluctuations can minimize the occurrence of noise and vibration during the operation of the three-way valve.

In addition, according to the present invention, the groove formed in Shanghai Dong-gu is configured to have a steep slope and a mild slope to prevent water hammering by slowing the moving speed of the plunger by the gentle slope at a position where water hammering can occur. In the position where the ring does not occur, the rapid inclination portion increases the moving speed of the plunger, thereby enabling a quick changeover to the fluid supply oil.

In addition, according to the present invention, when the assembly between the Shanghai Dong-gu and the rotor is assembled by sliding the projection of the rotor to the inner side of the projection insertion groove formed on the outer surface of the Shanghai Dong-gu so as to prevent the occurrence of water hammering There is an advantage that can reduce the number of parts inside the three-way valve to be simplified and the assembly structure between the parts.

In addition, according to the present invention, the plunger is lowered when switching from the heating mode to the hot water mode, close to the first valve seat, and even if the pressure difference occurs before and after the plunger, the rotor constrains the Shanghai Dong-gu, It prevents the launcher from closing rapidly and does not generate water hammering.

1 and 2 is a cross-sectional view showing the structure and operation of the conventional three-way valve,

3 is a perspective view of a three-way valve according to the present invention;

4 is an exploded perspective view of FIG. 3;

5 is an exploded view of the groove formed in the shangdong-dong of the three-way valve according to the present invention,

6 is an operating state of the three-way valve when the boiler is in heating mode,

7 is an operating state of the three-way valve when the boiler is switched from the heating mode to the hot water mode,

8 is an operation state diagram of the three-way valve when the boiler is in the hot water mode.

** Explanation of Codes **

100: three-way valve 101: inlet

102: first outlet 103: second outlet

110: valve body 111: the first valve seat

112: second valve seat 120: guide member

125: guide rod 128: spring

130: shaft 140: plunger

150: drive unit 151: drive shaft

160: drive cam 161: detection projection

170: driven cam 181: top cover

182: upper body 190: limit switch

192: knob 200: three-way valve

201: inlet 202: first outlet

203: second outlet 210: valve body

211: first valve seat 220: upper body

230: guide member 231: second valve seat

240: shaft 250: plunger

260: East Shanghai 261: Groove

261a: lowest point 261b: highest point

261c: Steep slope 261d: Mild slope

270: rotor 271: through hole

272: projection 275: limit switch

280: top cover 281: through hole

290: drive unit 291: drive shaft

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

The three-way valve 200 according to the present invention, as shown in Figure 3, the inlet 201, the first outlet 202 and the second outlet 203 is formed in a different direction and the valve body 110, The upper body 220 and the upper cover 280 are sequentially coupled to the upper side, and consists of a structure in which the drive unit 290 is installed on the upper side of the upper cover 280.

In one embodiment, the three-way valve 200 may be applied to a boiler for supplying heating water and hot water, the inlet 201 is connected to the main heat exchanger side of the boiler, the first outlet 202 is heated Heating water is connected to the heating water supply pipe is supplied to the heating source, the second outlet 203 may be configured to be connected to the hot water supply heat exchanger side to heat the direct water with hot water using the heat of the heating water heated in the main heat exchanger. have.

An internal configuration of the three-way valve 200 will be described with reference to FIG. 4.

The plunger which is moved up and down inside the valve body 210 to switch the flow path to supply the fluid introduced through the inlet 201 in either of the first outlet 202 and the second outlet 203 ( 250 and a shaft 240 penetrated vertically through the center portion of the plunger 250 is installed.

The lower portion of the upper body 220 is integrally formed with a guide member 230 for guiding the shaft 240 to move in the vertical direction. The plunger 250 is disposed between the first valve seat 211 (see FIG. 5) provided at the upper end of the first outlet 202 and the second valve seat 231 provided at the lower end of the guide member 230. Will be moved to.

At the top dead center position where the plunger 250 is lifted and close to the second valve seat 231, fluid communication is performed between the inlet 201 and the first outlet 202, and the fluid supply to the second outlet 203 is blocked. Thus, the heating water heated in the main heat exchanger becomes the heating mode supplied to the heating source. On the contrary, at the bottom dead center position where the plunger 205 descends and comes into close contact with the first valve seat 211, fluid communication is made between the inlet 201 and the second outlet 202 and the fluid is supplied to the first outlet 202. Is blocked and the heating water heated in the main heat exchanger is in the hot water mode supplied to the hot water heat exchanger side.

The upper end of the shaft 240 is coupled to the lower end of the Shanghai Dong-gu 260 which is installed to be movable up and down inside the upper body 220. Therefore, when the shangdong-dong 260 is moved up and down by receiving the power of the driving unit 290, the shaft 240 and the plunger 250 coupled thereto are also moved together.

A wavy groove 261 is formed along the circumferential direction on the outer surface of the shanghai donggu 260. Referring to FIG. 5, the grooves 261 are waveform-connected such that the lowest point 261a and the highest point 261b are alternately positioned at 90 ° intervals.

The outer surface of the Shanghai Dong-gu 260 has a groove 261 and a step 262a above the point where the lowest point 261a is formed, and a protrusion insertion groove 262 is formed downward from the upper end of the Shanghai Dong-gu 260. It is. And as a switching means for controlling the operation of the drive unit 290 so that the plunger 250 is stopped in a state in close contact with the first valve seat 211 or the second valve seat 231 on one side of the shangdong dong 260. A limit switch 275 is provided on and off in accordance with the shanghai dong of the shanghai dong 260.

The rotor 270 that is rotated at a constant height is coupled to the upper side of the shangdong-dong 260, and the driving shaft 291 of the driving unit 290 is formed at the center of the upper cover 280. It penetrates the through hole 281 and is coupled to the through hole 271 formed in the upper center portion of the rotor 270.

On the inner side of the rotor 270 is formed a projection 272 is inserted into the groove 261 formed in the shangdong-dong 260 to slide along the inner side of the groove 261 when the rotor 270 rotates. It is.

Coupling between the rotor 270 and the Shanghai Dong-gu 260, the projection 272 of the rotor 270 by pushing the projection 272 of the rotor 270 in the downward direction from the protrusion insertion groove 262 of the Shanghai Dong-gu 260. It is made by seating on the inner side of the groove (261). In this case, since the step 262a is formed at the boundary between the groove 261 and the projection insertion groove 262, the projection 272 is disposed on the step 262a even when the projection 272 is located below the projection insertion groove 262. Since the rotor 272 and the Shanghai Dong-gu 260, even if located at the top dead center will remain coupled to each other without being separated.

Due to the coupling structure, the rotor 270 receives the rotational force of the driving unit 290 and rotates at the same height, but the protrusions 272 of the rotor 270 are grooved 261 of the shangdong-dong 260. While sliding along the Shanghai dong 260 by the relative movement between the rotor 270 and Shanghai dong 260 is a linear movement up and down.

Referring to FIG. 5, a steep inclined portion 261c is formed in an area proximate to both sides of the lowest point 261a of the groove 260, and a mildly inclined portion 261d is formed in an area proximate to both sides of the highest point 261b. . Further, the inclination gradually forms gradually from the lowest point 261a of the groove 261 to the highest point 261b.

Hereinafter, the operation of the three-way valve 200 of the present invention is applied to the boiler with reference to FIGS. 6 to 8.

Referring to FIG. 6, when the boiler is in the heating mode, the plunger 250 is positioned at a top dead center in close contact with the second valve seat 231, and the protrusion 272 of the rotor 270 may be located at Shanghai Dong-gu ( It is located at the lowest point 261a of the groove 261 of 260.

In this case, the heating water introduced from the main heat exchanger through the inlet 201 is discharged to the first outlet 202 to supply the heating water to the heating source.

When switching from the heating mode to the hot water mode, the plunger 250, which is in close contact with the second valve seat 231 by the rotation of the driving unit 290, moves downward toward the first valve seat 211 side. As it moves downward, the flow rate of the heating water discharged through the second outlet 203 increases gradually compared to the flow rate of the heating water discharged through the first outlet 202.

At the beginning of the movement of the plunger 250, the upper and lower portions of the shandong dong 260 according to the rotation of the driving unit 290 by the steep slope 261c formed on both sides of the lowest point 261a of the groove 261 of the shandong dong 260. When the plunger 250 descends quickly because the movement width becomes large, and the plunger 250 descends to a position close to the first valve seat 211, the highest point of the groove 261 of the Shanghai Dong-gu 260 is increased. Due to the mildly inclined portion 261d formed at both sides of the 261b, the width of the shandong east of the shandong dong 260 according to the rotation of the driving unit 290 gradually decreases, so that the descending speed of the plunger 250 is lowered, thereby causing the pressure fluctuation. Since it is possible to minimize the water hammering caused by sudden pressure fluctuations can be prevented.

That is, as shown in FIG. 7, when the plunger 250 descends to a position close to the first valve seat 211, the heating water flowing through the inlet 201 and flowing toward the second outlet 203 is plunger. The pressure difference between the pressure for pressing the 250 in the downward direction and the pressure for heating the water flowing through the inlet 201 and flowing toward the first outlet 203 to press the plunger 250 upwards rapidly. In this case, there is a problem in that water hammering occurs due to a sudden pressure change while the plunger 250 suddenly comes into close contact with the first valve seat 211 due to the pressure difference between the upper and lower plungers 250.

However, according to the present invention, the projection 272 of the rotor 270 is inserted into the groove 261 of the Shanghai Donggu 260 to maintain the coupling state between the rotor 270 and Shanghai Donggu 260, When the plunger 250 descends to a position close to the first valve seat 211 by switching, the descending moving speed gradually decreases, even after the pressure difference before and after the plunger 250 sufficiently decreases. As shown in FIG. 8, the plunger 250 is in close contact with the first valve seat 211, thereby minimizing fluid pressure fluctuations before and after the plunger 250, thereby preventing occurrence of water hammering. You can do it.

In addition, even if there is a pressure difference before and after the plunger 250, the projection 272 of the rotor 270 is inserted into the groove 261 of the Shanghai Dong-gu 260 to constrain the Shanghai Dong-gu 260, so the plunger 250 There is no phenomenon of closing rapidly, thereby suppressing the occurrence of water hammering.

According to the present invention as described above, the water hammer that can occur when switching from the heating mode of the boiler to the hot water mode by the relative movement between the projection 272 of the rotor 270 and the groove 261 of Shanghai Donggu 260. By effectively preventing the ring phenomenon to prevent the occurrence of noise and vibration of the boiler and at the same time has the advantage of extending the life of the three-way valve 200, and in the groove 261 of Shanghai Dong-gu 260 and the inclined portion 261c and There is an advantage that the rapid switching of the flow path is possible by forming the slow slope portion 261d to adjust the moving speed of the Shanghai-dong 260 when switching the heating water flow path.

Claims

The supply passage of the fluid introduced into the inlet 201 by selectively opening and closing the first outlet 202 and the second outlet 203 by the plunger 250 reciprocating up and down by receiving the power of the driving unit 290 In the three-way valve 200 for connecting to any one of the first outlet 202 and the second outlet 203,

A valve body 210 in which the inlet 201, the first outlet 202, and the second outlet 203 are formed;

A rotor 270 coupled to the drive shaft 291 of the drive unit 290 and rotating at a predetermined height; And

One end of the shaft 240 penetrated and coupled to the plunger 250 is fixed, and receives a rotational force of the rotor 270 to reciprocate up and down with the shaft 240 and the plunger 250. Including a pupil (260),

The plunger 250 includes a first valve seat 211 formed at an upper end of the first outlet 202 and a second valve seat 231 horizontally disposed between the inlet 201 and the second outlet 203. Reciprocating up and down between the), the moving speed is gradually reduced when moving toward the first valve seat 211 side, the moving speed is gradually increased when moving toward the second valve seat 231 side. Three way valve.
The method of claim 1,

On the outer surface of the Shanghai Dong-gu 260, the lowest point 261a and the highest point 261b are formed at intervals of 90 degrees, and grooves 261 connected by a wave are formed;

An inner surface of the rotor 270 is formed with a protrusion 272 inserted into the groove 261 to slide along the inner surface of the groove 261 when the rotor 270 rotates; Three way valve.
The method of claim 2,

The protrusion 272 is provided at a position opposite to the inner surface of the rotor 270,

The outer surface of the Shanghai Dong-gu 260 has a groove 261 and a step 262a and is formed downward from the upper end of the Shanghai Dong-gu 260 to assemble between the Shanghai Dong-gu 260 and the rotor 270. Three-way valve, characterized in that the projection insertion groove 262 is formed to guide the projection 272 to be seated in the groove (261).
The method of claim 2,

When the protrusion 272 is located at the lowest point 261a of the groove 261, the plunger 250 is located at a top dead center that closes the second outlet 203 to open the first outlet 202. ;

When the protrusion 272 is located at the highest point 261b of the groove 261, the plunger 250 is located at a bottom dead center which closes the first outlet 202 to open the second outlet 203. Three-way valve characterized in that;
The method of claim 4, wherein

A steep inclined portion 261c is formed in an area proximate to both sides of the lowest point 261a of the groove 261;

Three-way valve, characterized in that the mild inclined portion (261d) is formed in the region close to both sides of the highest point (261b) of the groove (261).
The method of claim 5,

The groove 261 is a three-way valve, characterized in that the inclination gradually formed gradually from the lowest point (261a) to the highest point (261b).