KR101187045B1 - Fluid controlling ball valve - Google Patents

Abstract

According to an embodiment of the present invention, a ball valve for controlling a flow rate includes a valve body having an inlet port, an outlet port, a connection flow path, and an installation hole connected between the connection flow paths, and a fluid that is rotatably installed in the connection flow path and flows along the connection flow path. Ball having a passageway and a coupling groove located on the outer surface, a connecting rod rotatably coupled to the installation hole having a coupling portion inserted into the coupling groove, an adjustment knob coupled to the connecting rod for user operation, and guiding the ball. Between the first ball guide ring and the second ball guide ring, the first ball guide ring and the second ball guide ring having a curved guide surface so as to contact the outer circumferential surface of the ball so as to face each other with the ball interposed therebetween. Disposed between the first O-ring, the inner surface of the valve body and the second ball guide ring to closely contact the outer circumferential surface of the ball. And a second O-ring to contact the second ball guide ring on the outer peripheral surface of the ball.

Description

Flow control ball valve {FLUID CONTROLLING BALL VALVE}

The present invention relates to a flow control ball valve, and more particularly to a flow control ball valve capable of stably adjusting the opening amount of the flow path.

Valves are installed in the fluid line and used to control the flow rate of various fluids. Types of valves include ball valves, globe valves, plug valves, gate valves, check valves, needle valves, and float valves.

The ball valve (Ball Valve) is a ball inserted through the inside of the cylinder of the valve, the ball is rotated by the operation of the handle consists of a structure for opening and closing the flow path. Globe valve is a valve in which the spindle operates up and down by the operation of the handle and the seat blocks the nozzle to block the flow path. The globe valve is characterized by ensuring fluid shutoff and easy flow rate control.

The plug valve is a cock shaped like a cock, and rotates the conical plug by 90 ° around the shaft to open and close the flow path. The gate valve is a valve in which a valve plate installed in the direction perpendicular to the flow path closes the seat and performs a linear motion according to the operation of the handle. The gate valve is characterized by little impact on the fluid since the flow resistance is small and the opening and closing is performed gradually when fully deployed.

In addition, the butterfly valve (Butterfly Valve) is the valve of the simplest structure that can open and close the flow path by rotating the waste on the disc, the flow rate can be adjusted.

Among these, the ball valve has the same flow direction and flow path as the fluid, and the through hole of the ball inside the valve is almost the same as the diameter, there is almost no pressure loss, opening and closing is made at 90 ° has the advantage of quick opening and closing. Such a ball valve is suitable for blocking medium and high pressure piping.

Currently, ball valves having various structures have been developed and used, and various attempts have been made to increase the reliability of products such as durability and operational stability, and to improve convenience of use.

The present invention has been made in view of this point, and an object of the present invention is to provide a flow control ball valve which improves the flow control accuracy of the fluid to improve the reliability of the product and improves the ease of use.

Ball valve for adjusting the flow rate according to an embodiment of the present invention for achieving the above object, the valve body having an inlet and outlet and the connection passage connecting the inlet and the outlet and the installation hole connected in the middle of the connection passage, A ball rotatably installed in the connection channel and having a passage through which fluid flowing along the connection channel passes, and a coupling groove located on an outer surface thereof, the ball having a coupling portion inserted into the coupling groove, and rotatable in the installation hole A connecting rod coupled to each other, an adjustment knob coupled to the connecting rod for user operation, a guide of a curved surface disposed on the connecting flow path so as to face each other with the ball interposed therebetween to guide the ball, and in contact with an outer circumferential surface of the ball. A first ball guide ring and a second ball guide ring having a face, an inner surface of the valve body and the first ball guy A first O-ring disposed between the rings to closely contact the outer circumferential surface of the ball, an inner circumference of the valve body and the second ball guide ring, and the second ball guide ring to be disposed between the outer circumferential surface of the ball And a second o-ring in close contact with the second ring.

Ball valve for flow rate adjustment according to an embodiment of the present invention is disposed in the connecting flow path to be disposed between the inlet and the ball and a plurality of engaging pieces are provided to be inclined on the inner circumferential surface so that the end of the pipe is inserted through the inlet The grip ring may further include.

The ball valve for adjusting the flow rate according to the embodiment of the present invention may further include a support ring and a packing disposed in the connection passage to prevent the grip ring from being separated through the inlet.

Ball valve for adjusting the flow rate according to an embodiment of the present invention is disposed in the connection passage so as to be disposed between the outlet and the ball and a plurality of engaging pieces are provided to be inclined on the inner circumferential surface so that the end of the pipe is inserted through the outlet The grip ring may further include.

The ball valve for adjusting the flow rate according to an embodiment of the present invention may further include a support ring and a packing disposed in the connection flow path to prevent the grip ring from being separated through the outlet.

The valve body includes a housing having the inlet, the outlet, and the connection passage provided therein, and a bushing having a connection hole inserted into the housing and connected to the connection passage, wherein the connection passage includes the inlet around the ball. And an inflow flow path between the ball and an outflow flow path between the outlet and the ball, wherein an inner diameter of at least one of the inflow flow path and the outflow flow path is larger than an outer diameter of the ball, and the bushing is formed in the inflow flow path and the ball. It can be coupled to the larger side of the outflow passage than the outer diameter of the ball.

The ball has an insertion hole connected to the passage, the connecting rod has a through hole connected to the insertion hole, the flow rate ball valve according to an embodiment of the present invention, opening and closing the passage of the ball The control rod may further include a control rod slidably inserted into the through hole of the connection rod and a sub adjustment knob connected to the control rod so that the user can move the control rod.

A female thread is provided on an inner surface of the connecting rod, and a male thread corresponding to the female thread is provided on an outer surface of the adjusting rod, and the adjusting rod may be screwed to the connecting member.

Ball valve for flow rate adjustment according to an embodiment of the present invention further comprises a scale plate having a plurality of scales coupled to the outer surface of the control knob and disposed along the circumference of the sub-control knob to be arranged around the sub-control knob. Can be.

According to one embodiment of the present invention, a flow control ball valve includes a sub adjustment knob connected to the connection rod and a through hole to rotatably support the sub adjustment knob so that a user can move the connection rod. Further comprising a knob support member coupled to the adjustment knob, the coupling groove of the ball is connected to the passage, the coupling portion of the connecting rod is slidably coupled to the coupling groove to open and close the passage of the ball The coupling rod is provided with an insertion groove provided with a female thread, and the sub adjustment knob is provided with a male thread corresponding to the female thread of the connecting rod to be coupled to the connecting rod through a through hole of the knob support member. Protuberances may be provided.

The knob support member includes a support plate to which the sub adjustment knob is rotatably coupled, a support coupled to the adjustment knob to support the support plate to be spaced apart from the adjustment knob, and the indicator rod is coupled to the adjustment rod. The support may be provided with a plurality of scales for checking the height of the indicator member along the moving direction of the adjustment rod.

The flow rate ball valve according to the present invention can stably guide the rotating ball by the ball guide ring is in close contact with the outer peripheral surface of the ball by the O-ring. Therefore, it is possible to stably adjust the opening amount of the connection flow path by the rotation of the ball, thereby increasing the reliability of the product.

In addition, the ball valve for adjusting the flow rate according to the embodiment of the present invention is disposed in the valve body so that the grip ring can be coupled to the end of the pipe, so that the connection of the pipe is easy and convenient to use.

In addition, the flow control ball valve according to the present invention can adjust the opening amount of the flow path by rotating the ball member installed in the connection flow path using the adjustment knob, the control rod coupled to the ball member by the sub-adjustment knob to be slidable The opening amount of the passage of the ball member can be adjusted by moving. Therefore, the flow control accuracy of a fluid can be improved.

1 is a perspective view showing a ball valve for adjusting the flow rate according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing a ball valve for adjusting the flow rate according to an embodiment of the present invention.
3 is a cross-sectional view showing a ball valve for adjusting the flow rate according to an embodiment of the present invention.
Figure 4 is a perspective view showing a ball valve for adjusting the flow rate according to another embodiment of the present invention.
5 is a cross-sectional view showing a ball valve for adjusting the flow rate according to another embodiment of the present invention.
Figure 6 is an exploded perspective view showing a portion of the ball valve for adjusting the flow rate according to another embodiment of the present invention.
7 is for explaining the operation of the ball valve for adjusting the flow rate according to another embodiment of the present invention.
8 is a perspective view showing a ball valve for adjusting the flow rate according to another embodiment of the present invention.
9 is a cross-sectional view showing a ball valve for adjusting the flow rate according to another embodiment of the present invention.
10 is an exploded perspective view showing a portion of a flow control ball valve according to another embodiment of the present invention.
11 is for explaining the operation of the ball valve for adjusting the flow rate according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described in detail with respect to the ball valve for adjusting the flow rate according to the present invention.

In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of description. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

As shown in Figures 1 to 3, the flow control valve 100 according to an embodiment of the present invention, the valve body 110 having the inlet 111 and outlet 112, the valve body 110 of And a ball 132 rotatably installed therein and having a passage 133, a connecting rod 143 for rotating the ball 132, and an adjustment knob 148.

The valve body 110 includes a housing 114 provided with an inlet 111, an outlet 112, and a connection flow passage 113 connecting the inlet 111 and the outlet 112, and a bushing inserted into the housing 114. 115). One end of the housing 114 is provided with a first connection portion 117 on which the male thread 116 is formed, and the other end of the housing 114 is provided with a second connection portion 119 on which the male thread 118 is formed. Pipe connecting members 120 and 121 for connecting the pipes 10 and 11 are screwed to each of the connecting portions 117 and 119, respectively.

As illustrated in FIGS. 2 and 3, an installation part 124 having an installation hole 123 connected to the connection flow passage 113 is provided in the middle portion of the housing 110. The installation hole 123 is connected to the connection flow passage 113 substantially perpendicularly. The male thread 125 is provided on the outer circumferential surface of the installation portion 124.

The connection passage 113 inside the housing 114 is divided into an inflow passage 113a connected to the inlet 111 around the ball 132 and an outlet passage 113b connected to the outlet 112. The inner diameter of the inflow passage 113a is larger than the outer diameter of the ball 132, and the inner diameter of the outflow passage 113b is smaller than the outer diameter of the ball 132. Therefore, when the ball valve 100 is assembled, the ball 132 may be inserted into the valve body 110 through the inflow passage 113a.

After the ball 132 is inserted to a portion where the installation hole 123 of the housing 114 is provided, the bushing 115 is coupled to the inflow passage a. The bushing 115 has a connection hole 127 whose inner diameter is smaller than the outer diameter of the ball 132, thereby preventing the ball 132 from escaping through the inflow passage 113a. The bushing 115 has a male thread 129 corresponding to the female thread 128 provided on the inner circumferential surface of the housing 114 and is screwed to the housing 114. An o-ring 130 is provided between the bushing 115 and the inner surface of the housing 114 for sealing therebetween.

As shown in FIGS. 2 and 3, the ball 132 has a passage 133 and a coupling groove 134 through which fluid flowing along the connection passage 113 of the valve body 110 can pass. The coupling groove 134 is provided on the outer circumferential surface of the ball 132 to be coupled to the connection rod 143 coupled to the installation hole 123. When the ball 132 is inserted into the valve body 110, the coupling groove 134 is disposed coaxially with the installation hole 123. Coupling groove 134 is for coupling with the connecting rod 143 is made of a non-circular.

The connection passage 113 may be opened or closed by the rotation of the ball 132, or the opening amount of the connection passage 113 may be adjusted. That is, when the passage 133 is disposed in parallel with the connection passage 113, the opening amount of the connection passage 113 becomes maximum, and when the passage 133 deviates from the connection passage 113, the connection passage 113 is closed. Is blocked. As the angle between the passage 133 and the connection passage 113 approaches 0 ° to 90 °, the opening amount of the connection passage 113 gradually decreases.

The first ball guide ring 136 and the second ball guide ring 138 for guiding the rotating ball 132 are installed in the middle of the connection passage 113 inside the valve body 110. These ball guide rings 136 and 138 are disposed to face each other with the ball 132 interposed therebetween, and the balls 132 are rotatably disposed between these guide rings 136 and 138. The ball guide rings 136 and 138 have guide faces 137 and 139 that abut the outer surface of the ball 132. Guide surfaces 137 and 139 are made of curved surfaces corresponding to the outer circumferential surface of the ball 132.

The first O-ring 140 is disposed between the first ball guide ring 136 and the valve body 110, and the second O-ring 141 is disposed between the second ball guide ring 138 and the valve body 110. Is placed. The first o-ring 140 and the second o-ring 141 are made of a flexible material having elastic force, thereby providing elastic force toward the ball 132 with respect to the first ball guide ring 136 and the second ball guide ring 138. do. Therefore, the first ball guide ring 136 and the second ball guide ring 138 are in close contact with the outer peripheral surface of the ball 132, the ball 132 is the first ball guide ring 136 and the second ball guide ring ( 138) can be rotated smoothly in contact with the state. And since the rotation of the ball 132 is made smoothly, the opening amount adjustment by the rotation of the ball 132 can be made stable.

As shown in FIGS. 2 and 3, the connecting rod 143 is rotatably coupled to the installation hole 123 of the valve body 110. An O-ring 144 is interposed between the connecting rod 143 and the inner surface of the installation unit 124. The connecting rod 143 connects the ball 132 and the adjustment knob 148. One end of the connecting rod 143 is provided with a first coupling part 145 coupled with the ball 132. The other end of the 143 is provided with a second coupling portion 146 coupled with the adjustment knob 148.

The first coupling part 145 has a non-circular shape corresponding to the shape of the coupling groove 134 of the ball 132 and is inserted into the coupling groove 134. The second coupling portion 146 has a non-circular shape corresponding to the shape of the coupling hole 149 provided in the adjustment knob 148 and is inserted into the coupling hole 149. Thus, the user can rotate the ball 132 by manipulating the adjustment knob 148. The connecting rod 143 is limited by the stopper member 150 coupled to the valve body 110 in the vertical movement and only the rotational movement is possible. The closure member 150 has a through hole 151 through which the connecting rod 143 can penetrate, and a female thread 152 corresponding to the male thread 125 of the mounting portion 124.

As shown in FIGS. 2 and 3, the first grip ring 154 is coupled to the inlet flow passage 113a at the end of the pipe 10 and 11 inserted into the valve body 110 through the inlet 111. ) Is disposed, and a second grip ring 156 to which the ends of the pipes 10 and 11, which are inserted into the valve body 110 through the outlet 112, is coupled to the outlet passage 113b. The first grip ring 154 and the second grip ring 156 are provided with a plurality of locking pieces 155 and 157 inclined on the inner circumferential surface thereof so that the ends of the pipes 10 and 11 can be caught. The plurality of locking pieces 155 and 157 are elastically deformable, and are opened when the pipes 10 and 11 are inserted and then retracted when the ends of the pipes 10 and 11 pass through the pipes 10 ( Fix the end of 11).

The first grip ring 154 is supported by the first support ring 158 and the first packing 159 disposed in the inflow passage 113a and cannot be easily separated from the inflow passage 113a. The second grip ring 156 is supported by the second support ring 160 and the second packing 161 disposed in the outlet flow passage 113b and thus cannot be easily separated from the outlet flow passage 113b. However, when the pipes 10 and 11 are removed, the pipe connecting members 120 and 121 are removed and the pipes 10 and 11 are pulled to draw these grip rings 154 and 156 and the support rings 158 ( 160 and packings 159, 161 can be released from the valve body 110, and they can be easily separated from the pipes 10, 11.

In the present invention, only one grip ring may be installed inside the valve body 110 in the inflow passage 113a or the outflow passage 113b.

As described above, in the flow control ball valve 100 according to an embodiment of the present invention, the ball guide rings 136 and 138 are stably in close contact with the outer circumferential surface of the ball 132 by the O-rings 140 and 141. As a result, the rotating ball 132 can be stably guided. Therefore, the opening amount of the connection passage 113 may be smoothly adjusted by the rotation of the ball 132.

And the ball valve 100 for adjusting the flow rate according to an embodiment of the present invention is the grip ring 154, 156 that can secure the end of the pipe 10, 11 is inserted into the valve body 110 By providing the pipe 10, 11 is easy to connect.

4 to 7 show a ball valve for adjusting the flow rate according to another embodiment of the present invention.

As shown in FIGS. 4 to 6, the ball valve 200 for adjusting the flow rate according to another embodiment of the present invention includes a valve body 211 and a valve body 211 having an inlet 216 and an outlet 217. The ball 235 rotatably installed in the interior of the ball 235, the connecting rod 240 for rotating the ball 235 and the adjustment knob 250, opening and closing the passage 236 of the ball 235 Adjusting rod 260, and a sub adjusting knob 270 for moving the adjusting rod 260.

As shown in FIG. 5, the valve body 211 includes a first body 212 provided with an outlet 217 and a second body 213 provided with an inlet 216. A female thread 223 is provided at one end of the first body 212 and a male thread 224 corresponding to one end of the second body 213 for coupling the first body 212 and the second body 213. ) Is provided. The open portion of the first body 212 is larger than the size of the ball 235 so that the ball 235 can be inserted into the first body 212.

An o-ring 225 is interposed between the first body 212 and the second body 213. The inlet 216 and the outlet 217 are connected through the connecting passage 218. The first body 212 is provided with an installation part 220 having an installation hole 221 connected to the connection flow path 218. The installation hole 221 is connected to the connection flow path 218 substantially perpendicularly. The external thread 222 is provided on the outer circumferential surface of the installation unit 220.

The first ball guide ring 226 and the second ball guide ring 229 for guiding the rotating ball 235 are installed in the middle of the connection flow path 218 inside the valve body 211. These ball guide rings 226 and 229 are disposed to face each other with the ball 235 interposed therebetween, and the balls 235 are rotatably disposed between these guide rings 226 and 229. The ball guide rings 226, 229 have guide faces 227, 230 that abut the outer surface of the ball 235. Guide surfaces 227 and 230 are curved surfaces corresponding to the outer circumferential surface of the ball 235.

The first o-ring 232 is disposed between the first ball guide ring 226 and the valve body 211, and the second o-ring 233 is disposed between the second ball guide ring 229 and the valve body 211. Is placed. The first o-ring 232 and the second o-ring 233 are made of a flexible material having elastic force, providing elastic force toward the ball 235 with respect to the first ball guide ring 226 and the second ball guide ring 229. do. Therefore, the first ball guide ring 226 and the second ball guide ring 229 are in close contact with the outer circumferential surface of the ball 235, the ball 235 is the first ball guide ring 226 and the second ball guide ring ( 229) can be rotated smoothly. And since the rotation of the ball 235 is made smoothly, the opening amount adjustment by the rotation of the ball 235 can be made stable.

The ball 235 may include a passage 236 through which the fluid flowing along the connection flow path 218 of the valve body 211 passes, an insertion hole 237 vertically connected to the passage 236, and an insertion hole 237. ) Has a coupling groove 238 disposed coaxially with. Coupling groove 238 is for coupling with the connecting rod 240 is made of a non-circular. As the ball 235 rotates, the connection flow path 218 may be opened or closed, or the opening amount of the connection flow path 218 may be adjusted. That is, when the passage 236 is disposed in parallel with the connection passage 218, the opening amount of the connection passage 218 becomes the maximum, and when the passage 236 deviates from the connection passage 218, the connection passage 218 Is blocked. As the angle between the passage 236 and the connection passage 218 approaches 0 ° to 90 °, the opening amount of the connection passage 218 decreases.

As shown in FIGS. 5 and 6, the connecting rod 240 is rotatably coupled to the installation hole 221 of the valve body 211. The O-ring 245 is interposed between the connection rod 240 and the inner surface of the installation unit 220. The connection rod 240 connects the ball 235 and the adjustment knob 250. One end of the connection rod 240 is provided with a first coupling part 241 coupled to the ball 235, and the connection rod ( The other end of the 240 is provided with a second coupling portion 242 coupled with the adjustment knob 250. The first coupling portion 241 has a non-circular shape corresponding to the shape of the coupling groove 238 of the ball 235, and the second coupling portion 242 is a coupling hole 251 provided in the adjustment knob 250. ) Is made of a non-circular shape corresponding to the shape. Therefore, when the adjustment knob 250 rotates, the connecting rod 240 and the ball 235 rotate together.

In the center of the connecting rod 240 is formed a through hole 243 in which the adjusting rod 260 is slidably inserted. A portion of the inner surface of the connecting rod 240 is provided with a female thread 244 for screwing with the adjusting rod 260. The connecting rod 240 inserted into the installation hole 221 of the valve body 211 is fixed to the valve body 211 by the cap member 246. The closure member 246 has a through hole 247 through which the connecting rod 240 can penetrate, and a female thread 248 corresponding to the male thread 222 of the mounting portion 220.

The adjustment knob 250 is for user manipulation and is coupled to the end of the connecting rod 240. At the center of the adjustment knob 250 is a non-circular coupling hole 251 to which the second coupling part 242 of the connection rod 240 is coupled, and a receiving groove 252 coaxially with the coupling hole 251. Prepared. The user may manually adjust the opening amount of the connection flow path 218 by rotating the ball 235 by operating the adjustment knob 250. On the outer surface of the adjustment knob 250, a ring-shaped scale plate 255 in which a plurality of scales are marked at regular intervals is coupled. The closure member 246 is received in the adjustment knob 250 when the adjustment knob 250 is coupled to the connecting rod 240.

The adjusting rod 260 is inserted into the insertion hole 237 of the ball 235 through the through hole 243 of the connecting rod 240. An o-ring 265 is interposed between the adjustment rod 260 and the inner surface of the connecting rod 240. The adjustment rod 260 is inserted into the passage 236 of the ball 235 and has a block 261 for opening and closing the passage 236. The passage 236 is blocked when the blocking portion 261 is in contact with the inner surface of the ball 235, and the passage 236 is opened when the end of the blocking portion 261 is spaced apart from the inner surface of the ball 235. In addition, the opening amount of the passage 236 is adjusted according to the separation distance between the end of the blocking portion 261 and the inner surface of the ball 235. The end of the blocking portion 261 is made of a curved surface, which is to more precisely adjust the opening amount of the passage 236.

On the outer circumferential surface side of the adjusting rod 260, a male thread 262 corresponding to the female thread 244 of the connecting rod 240 is provided, and the adjusting rod 260 is screwed to the connecting rod 240. In addition, a non-circular coupling groove 263 is provided at one end of the adjustment rod 260, and the sub adjustment knob 270 for user manipulation is coupled to the coupling groove 263. Accordingly, when the sub adjustment knob 270 rotates, the adjustment rod 260 also rotates, and when the adjustment rod 260 rotates, the female thread 244 of the connection rod 240 and the male thread of the adjustment rod 260 ( The action of 262 causes the adjustment rod 260 to rise or fall.

The sub adjustment knob 270 has a knob body 271 and a coupling protrusion 272 protruding from the knob body 271. Coupling protrusion 272 is made of a non-circular shape corresponding to the shape of the coupling groove 263 to be coupled to the coupling groove 263 of the adjustment rod 260. The coupling protrusion 272 is coupled to the coupling groove 263 of the adjustment rod 260 through the through hole 243 of the connecting rod 240. The knob body 271 is disposed at the center of the scale plate 255 so as to protrude out of the adjustment knob 250. An insertion groove 274 for inserting an operation mechanism such as a driver is provided at the center of the knob body 271. The sub adjustment knob 270 may be protected by a protective cap 275 detachably coupled to the adjustment knob 250.

As shown in FIG. 7, the user can slide the adjusting rod 260 by turning the knob body 271. At this time, the user can appropriately adjust the moving distance of the adjustment rod 260, that is, the opening amount of the passage 236, by checking the scale provided on the scale plate 255.

As such, the ball valve 200 for adjusting the flow rate according to another embodiment of the present invention uses the connection rod 240 and the adjustment knob 250. The ball 235 installed in the connection flow path 218 of the valve body 211. It is possible to adjust the opening amount of the connection flow path 218 by rotating, and the passage of the ball 235 connected to the connection flow path 218 by moving the adjustment rod 260 which is slidably coupled to the ball 235 ( 236) can be adjusted. Therefore, the flow control accuracy of a fluid can be improved.

Although not shown in the drawing, the inside of the valve body 211 for fixing the ends of the pipes 10 and 11 (see FIG. 3) inserted into the valve body 211 through the inlet 216 or the outlet 217. Grip rings 154 and 156 (see FIG. 3) may be disposed.

8 to 11 show a ball valve for adjusting the flow rate according to another embodiment of the present invention.

8 and 9, the ball valve 300 for adjusting the flow rate according to another embodiment of the present invention includes a valve body 311 and a valve body 311 having an inlet 316 and an outlet 317. The ball 335 is rotatably installed in the interior of the ball 335 and the passage 336, the adjustment knob 340 for rotating the ball 335, connects the ball 335 and the adjustment knob 340 and the ball 335 Connection rod 350 for opening and closing the passage 336 of the), the sub adjustment knob 370 for moving the connection rod 350, the knob support member 375 for rotatably supporting the sub adjustment knob 370 It includes.

The valve body 311 includes a first body 312 provided with an outlet 317 and a second body 313 provided with an inlet 316. A female thread 323 is provided at one end of the first body 312 and a male thread 324 corresponding to one end of the second body 313 for coupling the first body 312 and the second body 313. ) Is prepared. An o-ring 325 is interposed between the first body 312 and the second body 313. The inlet 316 and the outlet 317 are connected through a connection flow path 318 inside the valve body 311. The first body 312 is provided with an installation part 320 having an installation hole 321 connected to the connection flow path 318. The installation hole 321 is connected substantially perpendicularly to the connection flow path 318. The external thread 322 is provided on the outer circumferential surface of the installation unit 320.

The first ball guide ring 326 and the second ball guide ring 329 for guiding the rotating ball 335 are installed in the middle of the connection channel 318 inside the valve body 311. These ball guide rings 326 and 329 are disposed to face each other with the ball 335 interposed therebetween, and the ball 335 is rotatably disposed between these guide rings 326 and 329. The ball guide rings 326 and 329 have guide faces 327 and 330 that abut the outer surface of the ball 335. Guide surfaces 327 and 330 are curved surfaces corresponding to the outer circumferential surface of the ball 335.

A first o-ring 332 is disposed between the first ball guide ring 326 and the valve body 311, and a second o-ring 333 between the second ball guide ring 329 and the valve body 311. Is placed. The first o-ring 332 and the second o-ring 333 are made of a flexible material having elastic force to provide elastic force toward the ball 335 with respect to the first ball guide ring 326 and the second ball guide ring 329. do. Therefore, the first ball guide ring 326 and the second ball guide ring 329 are in close contact with the outer peripheral surface of the ball 335, the ball 135 is the first ball guide ring 126 and the second ball guide ring ( 129) can be rotated smoothly. And since the rotation of the ball 135 is made smoothly, the opening amount adjustment by the rotation of the ball 335 can be made stable.

The ball 335 has a passage 336 through which the fluid flowing along the connection flow path 318 of the valve body 311 can pass, and a coupling groove 337 vertically connected to the passage 336. Coupling groove 337 is made of a non-circular. As the ball 335 rotates, the connection flow path 318 may be opened or closed, or the opening amount of the connection flow path 318 may be adjusted. That is, when the passage 336 is disposed in parallel with the connection passage 318, the opening amount of the connection passage 318 becomes the maximum, and when the passage 336 deviates from the connection passage 318, the connection passage 318 Is blocked. As the angle between the passage 336 and the connection passage 318 approaches 0 ° to 90 °, the opening amount of the connection passage 318 decreases.

As shown in FIGS. 9 and 10, the adjustment knob 340 is rotatably coupled to the installation unit 320. The center of the adjustment knob 340 is provided with a through hole 341 for coupling the connecting rod 350 and a receiving groove 342 coaxially with the through hole 341. A female thread 343 and a pair of locking grooves 344 are provided around the receiving groove 342 of the adjustment knob 340 to face each other. The receiving member 345 is inserted into the receiving groove 342 to guide the connecting rod 350.

The guide member 345 has a non-circular guide hole 346 into which the connecting rod 350 is inserted and a pair of locking protrusions 347 inserted into the locking groove 344 of the adjustment knob 340. The adjustment knob 340 and the connecting rod 350 are connected to each other through the guide member 345. Accordingly, when the adjustment knob 340 rotates, the connection rod 350 also rotates. Since the connection rod 350 is also coupled to the ball 335, the user may adjust the opening amount of the connection flow path 318 of the valve body 311 by rotating the adjustment knob 340.

9 and 10, the connecting rod 350 is slidably coupled to the installation hole 321. An O-ring 357 is interposed between the connection rod 350 and the inner surface of the installation part 320. The connecting rod 350 is inserted into the coupling groove 337 of the ball 335 to be slidably coupled to the coupling part 351 for opening and closing the passage 336 and the guide hole 346 of the guide member 345. It has a coupling shaft 352.

The connecting rod 350 inserted into the installation hole 321 may not be completely separated from the installation hole 321 by the plug member 360 coupled to the installation unit 320. The closure member 360 has a through hole 361 into which the coupling shaft 352 is inserted. A female thread 362 corresponding to the male thread 322 of the mounting portion 320 is provided on the inner surface of the closure member 360, and the closure member 360 is screwed to the mounting portion 320.

Coupling portion 351 is made of a non-circular shape corresponding to the shape of the coupling groove 337 so as to be slidably inserted into the coupling groove 337 of the ball 335. Therefore, the engaging portion 351 and the ball 335 can not rotate relative to the slide only. The passage 336 is blocked when the engaging portion 351 is in contact with the inner surface of the ball 335, and the passage 336 is opened when the end of the engaging portion 351 is spaced apart from the inner surface of the ball 335. In addition, the opening amount of the passage 336 is adjusted according to the separation distance between the end of the coupling portion 351 and the inner surface of the ball 335. The end of the coupling portion 351 is made of a curved surface, which is to adjust the opening amount of the passage 336 more precisely.

The coupling shaft 352 has a non-circular shape corresponding to the shape of the guide hole 346 of the guide member 345. Therefore, the coupling shaft 352 and the guide member 345 can not rotate relative to each other and can only slide. An insertion part 353 is provided at the end of the coupling shaft 352, and an insertion groove 354 is formed at the center of the coupling shaft 352. The insertion groove 354 is for coupling with the sub adjustment knob 370, and a female thread 355 is provided around the insertion groove 354. The coupling member 352 is coupled to the coupling shaft 352. The indicator member 365 has a through hole 366 into which the insertion portion 353 can be inserted, and moves along with the connection rod 350 to allow the user to check the moving distance of the connection rod 350.

The sub adjustment knob 370 has a knob body 371 and a coupling protrusion 372 protruding from the knob body 371. An uneven portion 373 for preventing slippage is provided around the knob body 371. A male thread 374 corresponding to the female thread 355 of the connecting rod 350 is provided on the outer circumferential surface of the coupling protrusion 372, and the coupling protrusion 372 is screwed to the connecting rod 350.

The sub adjustment knob 370 is rotatably coupled to the knob support member 375 coupled to the adjustment knob 340. The knob support member 375 includes a support 376 screwed to the adjustment knob 340 and a support plate 377 provided at an end of the support 376 to rotatably support the sub adjustment knob 370.

In the center of the support plate 377 is provided with a through hole 378 into which the engaging projection 372 of the sub adjustment knob 370 is inserted. The male thread 379 corresponding to the female thread 343 of the adjustment knob 340 is provided at one side of the outer circumferential surface of the support 376. The support 376 has a hollow or transparent translucent cylindrical shape. The support 376 is provided with a plurality of scales at regular intervals along the moving direction of the connecting rod 350. The structure of the knob support member 375 is not limited to that shown, and may be changed into various structures capable of rotatably supporting the sub adjustment knob 370.

As illustrated in FIGS. 9 and 11, the user may open or close the passage 336 of the ball 335 or adjust the opening amount of the passage 336 by rotating the sub adjustment knob 370. That is, when the user rotates the sub adjustment knob 370, the connection rod 350 is lowered or raised, so that the coupling portion 351 of the connection rod 350 blocks the passage 336 or opens the passage 336. Since the indicator member 365 also moves together when the connection rod 350 moves, the user can appropriately adjust the moving distance of the connection rod 350 while looking at the scale of the knob support member 375 and the indicator member 365. .

As such, the flow rate control valve 300 according to another embodiment of the present invention uses the adjustment knob 340 to rotate the ball 335 installed in the connection flow path 318 of the valve body 311. The opening amount of the passage 336 of the ball 335 can be adjusted by moving the connecting rod 350 slidably coupled to the ball 335 using the sub adjustment knob 370. Can be adjusted. Therefore, the flow control accuracy of a fluid can be improved.

Although not shown in the drawing, the inside of the valve body 311 for fixing the ends of the pipes 10 and 11 (see FIG. 3) inserted into the valve body 311 through the inlet 316 or the outlet 317. Grip rings 154 and 156 (see FIG. 3) may be disposed.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

100, 200, 300: ball valve for flow control 110, 211, 311: valve body
111, 216, 316: inlet 112, 217, 317: outlet
113, 218, 318: connecting euros 132, 235, 335: balls
133, 236, 336: passage 134, 238, 337: coupling groove
136, 226, 326: first ball guide ring
138, 229, 329: second ball guide ring
140, 232, 332: first o-ring 141, 233, 333: second o-ring
143, 240, 350: Connecting rod 148, 250, 340: Adjustment knob
154, 156: first and second grip ring 155, 157: locking piece
158, 160: 1st, 2nd support ring 159, 161: 1st, 2nd packing

Claims (11)

A valve body having an inlet port, an outlet port, a connection channel connecting the inlet port and the outlet port, and an installation hole connected to the middle of the connection channel;
A ball rotatably installed in the connection flow passage, the ball having a passage through which fluid flowing along the connection flow passage and a coupling groove located on an outer surface thereof;
A connection rod rotatably coupled to the installation hole having a coupling portion inserted into the coupling groove;
An adjustment knob coupled to the connection rod for user operation;
A first ball guide ring and a second ball guide ring disposed in the connection passage so as to face each other with the ball therebetween to guide the ball, and having a curved guide surface to contact the outer circumferential surface of the ball;
A first O-ring disposed between the inner surface of the valve body and the first ball guide ring to closely contact the outer circumferential surface of the ball with the first ball guide ring;
A second O-ring disposed between the inner surface of the valve body and the second ball guide ring to closely contact the outer circumferential surface of the ball with the second ball guide ring; And
And a first grip ring disposed in the connection flow path so as to be disposed between the inlet and the ball, and having a plurality of engaging pieces inclined on an inner circumferential surface thereof so that the end of the pipe inserted through the inlet can be caught. Flow control ball valve.
delete The method of claim 1,
And a support ring and a packing disposed in the connection passage to prevent the first grip ring from being separated through the inlet.
The method of claim 1,
And a second grip ring disposed in the connection flow path so as to be disposed between the outlet and the ball, the second grip ring having a plurality of engaging pieces inclined on an inner circumferential surface thereof so that an end of the pipe inserted through the outlet can be caught. Flow control ball valve.
The method of claim 4, wherein
And a support ring and a packing disposed in the connection passage to prevent the second grip ring from being separated through the outlet.
The method of claim 1,
The valve body includes a housing having the inlet, the outlet and the connection passage, and a bushing having a connection hole inserted into the housing and connected to the connection passage.
The connection passage is divided into an inflow passage between the inlet and the ball and an outlet passage between the outlet and the ball with respect to the ball.
At least one of the inner diameter of the inflow passage and the outflow passage is larger than the outer diameter of the ball,
And the bushing is coupled to a side larger than an outer diameter of the ball among the inflow passage and the outflow passage.
The method of claim 1,
The ball has an insertion hole connected to the passage, and the connection rod has a through hole connected to the insertion hole,
A control rod slidably inserted into the through hole of the connection rod to open and close the passage of the ball; And
And a sub adjustment knob connected to the adjustment rod so that a user can move the adjustment rod.
The method of claim 7, wherein
A female thread is provided on an inner surface of the connecting rod, and a male thread corresponding to the female thread is provided on an outer surface of the adjusting rod, and the adjusting rod is screwed to the connecting rod.
The method of claim 8,
And a scale plate coupled to an outer surface of the control knob to be disposed around the sub control knob, the scale plate having a plurality of scales disposed along the circumference of the sub control knob.
The method of claim 1,
A sub adjustment knob connected to the connection rod so that a user can move the connection rod; And
And a knob support member having a through hole and coupled to the adjustment knob to rotatably support the sub adjustment knob.
The coupling groove of the ball is connected to the passage, the coupling portion of the connection rod is slidably coupled to the coupling groove to open and close the passage of the ball, the connection rod is provided with an insertion groove provided with a female thread ,
The sub-adjustment knob is a flow control ball valve, characterized in that the coupling projection is provided with a male thread corresponding to the female thread of the connecting rod to be coupled to the connecting rod through the through hole of the knob support member.
11. The method of claim 10,
The knob support member includes a support plate to which the sub adjustment knob is rotatably coupled, a support coupled to the adjustment knob to support the support plate to be spaced apart from the adjustment knob,
The connecting member is coupled to the connecting rod,
The support is provided with a plurality of scales for confirming the height of the indicator member along the direction of movement of the connecting rod.

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