KR100501255B1 - Apparatus preventing water leakage for ball valve - Google Patents

Abstract

The present invention relates to a leak shutoff device for a ball valve, wherein a rubber seat and a metal material are inserted into both connection portions of the valve chamber of the ball valve so as to be linearly moved at a predetermined interval and are in close contact with the seat of the ball to block leakage. And an elastic means for elastically supporting the sheet assembly such that the rubber sheet is pressed against the seat of the ball. And, when engaging and dismantling the ball to the valve body further comprises a separation means for moving the seat assembly away from the seat of the ball by a predetermined interval. In the present invention, when the rubber seat and the metal inner seat ring of the seat assembly are pressed onto the metal ball seat when the ball valve is closed, the rubber seat is initially pressed, and then the metal inner seat ring is pressed, and the seat assembly is It is squeezed by the piston action due to the cross-sectional area difference between the pressure side and the side to which the hydraulic pressure is applied while being pressed onto the seat surface, and the spring force is added to squeeze, so that the valve can be squeezed by excessive force. It can be used, and the leak is perfected, as well as easy to disassemble and recombine the ball in the valve body.

Description

Leakage blocking device of ball valve {APPARATUS PREVENTING WATER LEAKAGE FOR BALL VALVE}

The present invention is a ball valve widely used for piping such as water supply pipes, oil pipelines, and the like, in particular, for the maintenance or repair of the valve installed in the pipe body without removing the valve body from the pipe body, ball and ball seat The present invention relates to a water shutoff device of a ball valve having a repairable property, in particular, when the rubber seat and the inner seat ring of the seat assembly are pressed onto the metal ball seat when the ball valve is closed, The metal inner seat ring is pressed, the seat assembly is pressed against the seat surface of the ball, and is pressed by the action of the piston by the cross-sectional area difference between the pressure side and the pressure side to which the hydraulic pressure is applied. It can be used stably for a long time without any defect that is damaged by excessive force, and the leakage blocking is perfect. In addition, the present invention relates to a leak off of the ball valve so that the ball valve body in a simple easy to disassembly and reassembly device.

In general, a pipe for transferring various fluids, including water, is equipped with a ball valve as a valve to allow or block the flow of the fluid, the ball valve handle and the opening and closing ball which is rotatably installed inside the valve body and It is configured to allow or block the flow of fluid by opening and closing operation by means of rotating operation as an electric motor.

The ball valve according to the related art has a ball for opening and closing in a valve chamber of a valve body and then screwed a cover, and inserts a stem from the outside of the valve body to be fixed to the government of the opening and closing ball and then opens and closes the stem. It is a structure in which a mechanism is coupled, and a rubber sheet is coupled between an annular jaw formed inside the valve body and the opening / closing ball, and the rubber sheet is elastically in close contact with both sides of the opening / closing ball to leak fluid. It is configured to block.

However, in the above-described ball valve of the prior art, the rubber seat of the valve body is difficult to rotate the ball when the compression is too strong during the initial assembly, the weakening the pressing force has a problem that the leakage preventing force is lowered.

In addition, in a ball valve employing a metal seat, the metal seat suddenly presses against the seat surface of the ball due to the powerful hydraulic pressure acting when the valve is closed, which causes an excessive force on the valve, resulting in a defect that causes the valve to break. Problems are caused, there was a problem that can not be used stably for a long time.

In addition, the conventional ball valve is widely used because of the ease of manufacture and the reason that the price of the product is relatively inexpensive, but it was very inconvenient to continuously supply without interruption of the supply fluid in oil pipes, tap water and the like.

On the other hand, conventional ball valves include a side entry type in which the ball is introduced from the side to the valve body on the center line of the pipe and a top entry type in which the ball is injected from the top of the valve body. There are various structures that separate the body into 2 pieces, 3 pieces, 4 pieces, etc., but the upper insert type is mostly one body, and the special structure is considered as the sealing structure and the method of assembling and releasing the ball are special. Will be needed.

Therefore, it is necessary to improve the above-mentioned conventional problems and to continuously supply or minimize supply interruption of the fluid without interruption of the fluid during maintenance and repair of the ball valve. The main body shall be constructed so that it is not detached from the installed pipe, and second, a suitable leakage device for assembling and disassembling the ball and the seat ring should be provided. Accordingly, the present invention has been made to greatly improve the two structures.

More specifically, the rubber seat and the inner seat ring of the seat assembly are first pressed into the metal ball seat when the ball valve is closed, and then the rubber inner seat ring is pressed and then the seat assembly is pressed. It is squeezed by the action of the piston by the cross-sectional area difference between the side to which the water pressure is applied and the side to which the pressure is pressed while being pressed onto the seat surface of the seat. The purpose of the present invention is to provide a leak shutoff device for a ball valve which can be used as a leak stop and is completely blocked.

Another object of the present invention is to provide a ball shutoff device for a ball valve that can be easily disassembled and recombined ball in the valve body.

In order to achieve the above object, the present invention has a structure in which the body of the valve body is designed in one piece with a structure that does not remove the valve body from the installed pipe, and the assembly of the ball and the assembly of the seat and the seat ring according to this If it is installed in the pipe, it is easy to disassemble the ball from the ball valve.

In addition, when the body of the valve is one-piece, it is difficult to handle a lot of castability and handling, but the development of casting technology, processing advantages and other forms of two-piece, three-piece, four-piece valve body fastening and processing parts There is an advantage of reducing the cost increase due to the increase can be compensated for this, by developing a leakage blocking device suitable for this to ensure complete leakage blocking, it is configured to be easy to assemble and disassemble by the removable device.

More specifically, the present invention is a conventional ball valve for coupling the ball from the upper side to the valve chamber of the valve body, it is inserted into the connection between the both sides of the valve chamber to the left and right by a predetermined interval to be linearly moved in close contact with the seat of the ball And a seat assembly provided with a rubber sheet for blocking leakage and an inner sheet ring of a metal material, and elastic means for elastically supporting the sheet assembly such that the rubber sheet is pressed against the seat of the ball.

In the present invention, when the rubber seat and the inner seat ring of the seat assembly are pressed onto the metal ball seat when the ball valve is closed, the rubber seat is initially pressed, and then the metal inner seat ring is pressed, and the seat assembly of the ball It is squeezed by the piston action due to the cross-sectional area difference between the pressure side and the side to which the hydraulic pressure is applied while being pressed onto the seat surface. Can be used. Therefore, the present invention can be very advantageously applied to various ball valves including side insert ball valves and upper insert ball valves.

In addition, the present invention provides a ball valve further comprises a separation means for moving the seat assembly to be separated from the seat of the ball by a predetermined interval when engaging and disengaging the ball to the valve body.

This spacing means can be very advantageously applied to the upper insertion ball valve for inserting the ball into the valve body by coupling from the top.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail as follows.

1 to 9 is a view showing the configuration and operation of the leakage blocking device of the upper insertion type ball valve according to the present invention, Figures 1, 2, 3 are a plan view, a front view, a side view of the ball valve, respectively, 5 and 6 are cross-sectional views showing the configuration and operation of the leakage blocking device, Figure 9 is a plan view of the removable port.

As shown in the drawing, the leak stop device of the ball valve according to the present invention is a conventional ball valve for coupling the ball 200 to the valve chamber 110 of the valve body 100, the valve chamber 110 The seat assembly 130 is provided with a rubber sheet 320 to be inserted into the connecting portion 112 of the inside of the connection 112 to the left and right by a predetermined distance and in close contact with the seat 203 of the ball 200 to block leakage In addition, the rubber sheet 320 is configured to include an elastic means 350 for elastically supporting the seat assembly 130 so as to be compressed to the seat 203 of the ball 200.

The cup-shaped valve chamber 110 of the valve body 100 is provided with a circular opening 111 at the upper end, the connection portion 112 is formed on both sides of the valve chamber 110 extending along the cylindrical region, both connecting portions ( A flange 113 is formed at the end of 112.

In the ball 200 inserted into the valve body 100, the distribution part 201 and the blocking part 202 are formed in an orthogonal direction, and shafts 204 are formed at upper and lower ends of the ball 200.

The lower shaft 204 of the ball 200 is coupled to the shaft hole 114 of the valve body 100 via the bush 123, and the cover 120 is fixed to the opening 111 of the valve body 100. Fixed through the 122, the upper shaft 204 of the ball 200 is coupled to the shaft hole 121 of the cover 120 via the bush 123.

The sheet assembly 130 is coupled to the sheet 203 of the ball 200 in a configuration in which the rubber sheet 320 is inserted between one end of the metal inner sheet ring 300 and the metal outer ring 310. It is in close contact to maximize the leakage blocking effect.

The seat assembly 130 has the inner seat ring 300 and the outer ring 310 is inserted into the inner side of the connecting portion 112 of the valve body 100, the front end and the outer ring 310 of the inner seat ring 300 Rubber sheet 320 is coupled between the front end engaging portion 311 of the) and the protrusion 322 formed on its outer circumferential surface is fitted into the annular groove 312 formed in the engaging portion 311 of the outer ring 310, , The outer ring 300, 310 is fastened by a boltless wrench 330. Incidentally, inclined surfaces 301 and 321 are formed at the distal ends of the inner sheeting 300 and the rubber sheet 320.

In the step portion 115 of the valve body 100, the rear end portion 302 of the inner seating ring 300 extends by a predetermined length, and a space between the rear end portion and the stepping portion 115 of the inner seating ring 300. A portion 117 is formed, and the space portion 118 formed by the stepped portion 115a of the valve body 100, the rear end portion of the outer ring 310, and the inner seat ring 300 is formed through the seat assembly 130. The O-ring 340 is inserted to seal the moving part so as not to leak, and the elastic means 350 is inserted into the plurality of insertion grooves 313 formed in the outer ring 310 so that the stepped portion 115b of the valve body 100 is inserted. ) Is in elastic contact.

It is preferable to use a compression spring for the elastic means (350).

In addition, the water leakage blocking device of the ball valve according to the present invention, when the ball body 200 is coupled and dismantled to the valve body 100, the seat assembly 130 is predetermined from the seat 203 of the ball 200. It is further configured to include a separation means 140 for moving apart by an interval.

The separation means 140 is formed in the connecting portion 116 of the front and rear circular coupling holes 116 in both connecting portions 112 of the valve body 100, the eccentric pin 401 in each coupling hole 116 of both connecting portions 112 ) And the square protrusion 402 is inserted into the removal hole 400 formed on the inner and outer surfaces, so that the eccentric pins 401 of the respective removal holes 400 are inserted into the grooves 314 formed on the outer ring 310, respectively. The leakage opening 400 is blocked by the leakage blocking and supporting means 150, and is configured to be rotatable and coupled.

The leakage blocking and supporting means 150 is an annular locking groove 403 of the detachable opening 400 in the stepped portion 116a formed in the middle portion of each coupling hole 116 of both connecting portions 112 of the valve body 100. A support ring 410 having an annular protrusion 411 inserted into the support ring 410 is inserted, and the stop ring 420 is inserted into and fixed to the insertion groove 116b formed outside the stepped portion 116a, and the stop ring cover 430. ) And the removable cover 450 is fastened with a screw 460 through the O-ring 440.

In the drawings, reference numeral 125 denotes an O-ring, 126 denotes a shaft cover, 127 an O-ring, 128 denotes a packing bush, and 129 denotes a packing grand.

Hereinafter, the operation of the present invention as described above is as follows.

The detachable opening 400 and the elastic means 350 are an assembly of the inner and outer rings 300 and 310 and the rubber sheet 320, that is, the front and rear seat assembly 130. Coupling the wrench to the square protrusion 402 of the) rotates the removal opening 400, the eccentric pin 401 of the removal opening 400 pushes the groove 314 of the outer ring 310 seat assembly 130 5 is moved to the right in the space 117, 118 range with reference to FIG. 5, and when the removal opening 400 is reversely rotated, the seat assembly 130 is spaced by the restoring elasticity of the elastic means 350 Moving to the left in the range of 117, 118, and the seat assembly 130 is moved to the right to ensure sufficient space for coupling and detaching the ball 200 in the valve chamber (110).

In addition, when dismantling the ball 200 from the valve body 100, the cover fixing ring 122 is disassembled by releasing the screw 124 fastened to the upper end of the valve chamber 110 of the valve body 100 to cover ( Disassemble 120).

Then, when the removal opening 400 is rotated 90 degrees, the seat assembly 130 is pushed into the space parts 117 and 118 to secure a space for separating the ball 200 upward as shown in FIG. 200 may be disassembled and recombined without interfering with the seat assembly 130.

FIG. 7 is a cross-sectional view for describing a leak blocking operation, and FIG. 8 is a partial enlarged view of FIG. 7. Hereinafter, the leak blocking operation will be described with reference to FIGS. 7 and 8.

When the ball 200 is rotated by the opening / closing drive means 160 in a state in which a fluid such as water flows in the pipeline having the ball valve according to the present invention, the water pressure in the pipeline is reduced as shown in FIGS. 7 and 8. It acts in the direction of the arrow shown, and this water pressure causes the seat assembly 130 to be pressed against the seat 203 of the ball 200 to block leakage.

In addition, when the seat assembly 130 is compressed to the seat 203 of the ball 200 by the hydraulic pressure of the pipe line, the rubber sheet 320 of the seat assembly 130 is first seated 203 of the ball 200. In the first step, and then the end of the crimping portion 301a of the metal inner sheeting ring 300 is compressed in two steps. Thus, in the first step, the rubber sheet 320 is attached to the metal ball sheet 203. It is softly pressed by the contact of rubber, and in step 2, the pressing part 301a of the inner seat ring 300 made of metal and the ball seat 203 made of metal are pressed strongly by metal-to-metal contact, so that the pressure is firmly pressed against the valve. do.

In addition, the rubber sheet 320 and the inner seat ring 300 of the seat assembly 130 is pressed against the ball seat 203 as shown in Figs. 7 and 8 (line pressure for the cross-sectional area A of the seat assembly 130) ) Is greater than the cross-sectional area B of the tip inclined surface 301 of the inner seat ring 300, the pressing force is applied to the ball seat 203 by the difference in the cross-sectional area is compressed by the action of the piston, the elasticity of the spring 350 to this pressing force In addition to this, the leak is completely blocked.

In the present invention as described above, the rubber seat of the seat assembly and the inner sheet of metal material are pressed onto the ball seat when the ball valve is closed. Due to the strong compression by the contact, the excessive compression force on the valve does not act suddenly, thereby preventing the defect that the valve is damaged by the excessive force has the advantage that can be used stably for a long time.

In addition, since the rubber sheet of the seat assembly and the inner sheeting of the metal are pressed onto the ball seat, the pressure on the cross-sectional area of the seat assembly is greater than the cross-sectional area of the inclined surface of the tip of the inner seating ring. It is compressed by the action, the spring force is added to this compression force is applied, there is an advantage that the leak is completely blocked.

In addition, when disassembling or recombining the ball from the valve body, the seat assembly is linearly moved by rotating the desorption port having an eccentric pin to separate the ball by a predetermined distance, and then the ball can be easily disassembled and recombined without interference. Therefore, there is an effect that can be used very advantageously in the upper insertion ball valve for coupling the monolithic ball.

1 to 7 is a view showing the configuration and operation of the water leakage blocking device of the ball valve according to the present invention,

1 is a plan view of a ball valve.

2 is a partially cutaway front view of the ball valve.

3 is a partially cutaway side view of the ball valve.

4 is an exploded perspective view of the ball valve.

5 and 6 are cross-sectional view showing the configuration and operation of the leakage blocking device.

7 is a cross-sectional view for explaining the leakage blocking action.

8 is a partially enlarged view of FIG. 7;

9 is a plan view of the removal port.

<Description of reference numerals for main parts of the drawings>

100: main body 110: valve chamber

112: connecting portion 114: shaft hole

115, 115a, 115b: stepped portion 116: coupling hole

116a: step portion 116b: insertion groove

117: space portion 118: space portion

130: seat assembly 140: separation means

150: support means 160: opening and closing drive means

200: ball 201: distribution

202: breaker 203: sheet

204: shaft 300: inner sheeting

301, 321: slope 302: rear end

310: outer ring 311: coupling part

312: coupling groove 313: insertion groove

314: groove 320: rubber sheet

322: doljo 330: boltless wrench

340: O-ring 350: elastic means

400: release port 401: eccentric pin

402: square protrusion 403: annular locking groove

410: support ring 411: annular protrusion

420: stop ring 430: stop ring cover

440: O-ring 450: release cover

460 screw

Claims (7)

A seat assembly having a rubber seat 320 inserted into both connection portions 112 of the valve chamber 110 to the left and right to move linearly at predetermined intervals and in close contact with the seat surface of the ball 200 to block leakage. 130, elastic means 350 for elastically supporting the seat assembly 130 such that the rubber seat 320 is compressed to the seat surface of the ball 200, and the ball 200 is mounted on the valve body 100. ) Is provided with a separation means 140 for moving the seat assembly 130 to be spaced apart from the seat surface of the ball 200 by a predetermined interval when engaging and dismantling the valve chamber 110 of the valve body 100. In the ball valve for coupling the ball 200 at the top, the seat assembly 130 is the rubber seat 320 between the front end portion of the inner seat ring 300 and the front end coupling portion 311 of the outer ring 310. ), The protrusion 322 formed on the outer circumferential surface thereof is fitted into the engaging groove 312 formed in the engaging portion 311 of the outer ring 310. Is coupled, the separation means 140 is formed in the front and rear circular coupling holes 116 in both connecting portions 112 of the valve body 100, respectively, each coupling hole 116 of the connecting portion 112 The eccentric pin 401 and the square protrusion 402 is inserted into the removable opening 400 formed on the inner and outer surfaces, the eccentric pin 401 of each removable opening 400 is formed in the outer ring 310 314) respectively inserted, the leakage opening device of the ball valve, characterized in that the leakage is blocked by the leakage blocking and the support means 150 and rotatably coupled is configured. delete The method of claim 1, wherein the inner, outer ring 300, 310 Leakage blocking device of the ball valve, characterized in that configured by fastening with a boltless wrench (330). [4] The leakage blocking device of the ball valve according to claim 3, wherein the front end portions of the inner seat ring and the rubber seat 320 are formed of inclined surfaces 301 and 321. According to claim 3, The rear end portion 302 of the inner seat ring 300 is inserted into the stepped portion 115 of the valve body 100 so as to be linearly movable left and right while extending over a predetermined length. The O-ring 340 is inserted into the O-ring insertion space 118 formed by the rear end of the seat ring 300 and the outer ring 310 and the inner partial surface of the valve body 100, and the outer ring 310. The compression coil spring of the elastic means 350 is inserted into the plurality of insertion grooves 313 formed at the bottom thereof so that one end of the compression coil spring is elastically contacted with the spring contact surface 115c formed inside the valve body 100. Leakage blocking device of the ball valve, characterized in that configured to be coupled to. The method of claim 5, wherein the separation means 140 is formed in each of the connecting portion 112 of the valve body 100, the circular coupling hole 116 before and after, respectively, each coupling hole of the connecting portion 112 ( The eccentric pin 401 and the square protrusion 402 is inserted into the removal opening 400 formed on the inner and outer surfaces, and the axis of each coupling hole 116 of both connecting portions 112 of the valve body 100 is inserted into the 116. Eccentric pins 401 of each of the detachable openings 400 are inserted into the grooves 314 of the outer ring 310 respectively formed to correspond to the respective coupling portions of both connecting portions 112 of the valve body 100. The ball 116 is a leakage blocking device of the ball valve, characterized in that the leakage block and the support means 150 is configured to be coupled to the rotatable and the rotatable water is blocked. The method of claim 6, wherein the leakage blocking and support means 150 is the outlet 400 in the stepped portion 116a formed in the middle portion of each coupling hole 116 of both connecting portions 112 of the valve body 100 The support ring 410 is provided with an annular projection 411 is inserted into the annular engaging groove 403 of the), and the stop ring 420 is inserted into the insertion groove 116b formed to the outside of the step portion 116a. Is inserted and fixed, through the stop ring cover 430 and the O-ring 440, the removable outlet cover 450 is fastened to the end of each coupling hole 116 by a screw 460, characterized in that the ball valve Leakage blocker.