CN115126927A

CN115126927A - PTA high-pressure angle stop valve

Info

Publication number: CN115126927A
Application number: CN202210728267.7A
Authority: CN
Inventors: 徐其波; 刘铁星
Original assignee: Suzhou Huagen Valve Co ltd
Current assignee: Suzhou Huagen Valve Co ltd
Priority date: 2022-06-25
Filing date: 2022-06-25
Publication date: 2022-09-30
Anticipated expiration: 2042-06-25
Also published as: CN115126927B

Abstract

The invention relates to the technical field of valves, and particularly discloses a PTA high-pressure angle type stop valve which comprises a valve body; a sealing cover is arranged in the valve body; a valve rod is arranged in the sealing cover, and a first groove is formed in the top of the sealing cover; a concave seat is arranged in the first groove; a padding pad is arranged in the concave seat; the top of the packing pad is provided with a pressing sleeve; the top of the valve body is provided with a supporting mechanism which can fix the sealing cover; a cover plate is arranged on the supporting mechanism; a second groove is formed in the side wall, close to the valve rod, of the concave seat; a first sealing ring sleeved outside the valve rod is arranged in the second groove; a first sliding groove is formed in the inner side wall of the top end of the second groove; an extrusion assembly is arranged inside the first sliding groove; the valve has good sealing effect when the filler material is fatigued by arranging the first sealing ring in the concave seat.

Description

PTA high-pressure angle stop valve

Technical Field

The invention relates to the technical field of valves, in particular to a PTA high-pressure angle type stop valve.

Background

The valve is a control part in a fluid conveying system, the valve has the functions of stopping, adjusting, guiding and the like, the variety and the specification of the valve are various, the angle type stop valve is one of a plurality of valves, the opening and closing part of the angle type stop valve is a plug-shaped valve clack, the sealing surface is a plane or a conical surface, the motion form of the valve rod is a lifting rod type or a lifting rotating rod type, the working condition of the valve applied in the PTA industry generally has the characteristic of strong corrosion, and the valve material is made of titanium, nickel base and other more noble metal materials.

Sealing work on the angle stop valve among the prior art only prevents that the valve from taking place to leak through set up the packing group in the valve, and the packing group comprises the stack of multilayer sealing packing, through establish the packing group cover install into the valve after on the valve rod in realize the sealing of valve, easily takes place fatigue after long-term the use when the packing group to make the sealed effect of packing group reduce, influence the sealed effect of valve.

Disclosure of Invention

The application provides PTA high pressure angle formula stop valve has the effect of carrying the whole sealed effect of valve for the valve takes place when tired at the filler material, and the valve is whole still keeps better sealed effect, reduces because the filler material takes place tiredly to the sealed effect of valve and produces the possibility of influence, the life of extension valve.

The application provides a PTA high pressure angle formula stop valve adopts following technical scheme:

the PTA high-pressure angle type stop valve comprises a valve body; the top of the valve body is provided with a placing groove communicated with the interior of the valve body; a sealing cover is arranged in the placing groove; a valve rod is arranged in the sealing cover, and a first groove is formed in the top of the sealing cover; a concave seat sleeved outside the valve rod is arranged in the first groove; a packing pad sleeved outside the valve rod is arranged in the concave seat; the top of the packing pad is provided with a pressing sleeve sleeved outside the valve rod; the top of the valve body is provided with a supporting mechanism which can fix the sealing cover; the supporting mechanism is provided with a cover plate part for driving the pressing sleeve to move downwards to extrude the packing pad; the valve rod is in threaded fit connection with the supporting mechanism; a second groove is formed in the side wall, close to the valve rod, of the concave seat; a first sealing ring sleeved outside the valve rod is arranged in the second groove; a first sliding groove is formed in the inner side wall of the top end of the second groove; the first sliding groove is internally provided with an extrusion assembly which can extrude the first sealing ring to be tightly attached to the valve rod by being driven by the packing pad.

By adopting the technical scheme, the concave seat is placed in the first groove after the sealing cover is arranged in the placing groove, the supporting mechanism is arranged at the top of the valve body, the sealing cover is extruded and fixed through the supporting mechanism to keep stable in the valve body, the packing gasket and the pressing sleeve are sleeved outside the valve rod and are installed in the concave seat, the cover plate is fixed on the supporting mechanism, so that the cover plate pushes the pressing sleeve to move downwards and extrude the packing pad, the packing pad deforms under the extrusion force of the pressing sleeve, the contact part of the packing pad and the valve rod has good sealing property, in the process that the packing pad is extruded to slide downwards, the packing pad pushes the extrusion assembly to extrude the first sealing ring in the concave seat, the first sealing ring is pressed to be tightly attached to the valve rod, so that the contact part of the valve rod and the first sealing ring has good sealing property, when the packing pad is fatigued, the sealing performance of the valve body is not easily affected greatly under the sealing action of the first sealing ring.

Preferably, a first inclined plane is arranged on the outer side wall, away from the valve rod, of the first sealing ring; the extrusion assembly comprises a connecting block; the connecting block is connected to the inner side wall of the first sliding groove in a sliding mode, the top of the connecting block, extending out of the first sliding groove, is in contact with the bottom of the packing pad, and the bottom of the connecting block is fixedly connected with the extrusion block; the extrusion block is in sliding fit with the inner side wall of the second groove, the bottom of the extrusion block is connected with the inner side wall of the bottom end of the second groove through a first spring, and a second inclined surface matched with the first inclined surface is arranged on the inner side wall, close to the first inclined surface, of the extrusion block; the second inclined surface is in contact with the first inclined surface.

Through adopting above-mentioned technical scheme, press the cover extrusion packing pad under the extrusion of pressure plate spare, packing compressive deformation and extrusion connecting block slide down along first spout, packing pad hugs closely the valve rod lateral wall after the compressive deformation, make and have good leakproofness between packing pad and the valve rod, the connecting block gliding in-process drives the first sealing ring of extrusion block extrusion, under the mating reaction on first inclined plane and second inclined plane, the valve rod is hugged closely to the first sealing ring of extrusion block extrusion, make the valve rod have good leakproofness with first sealing ring contact site, thereby promote the holistic leakproofness of valve body.

Preferably, a second sliding groove is formed in the inner side wall, far away from the valve rod, of the first sliding groove; the top of the second sliding chute is provided with a threaded through hole; a circular ring is fixedly connected to the outer side wall of the extrusion block, which is far away from the valve rod; the circular ring is in sliding fit with the inner side wall of the second sliding chute; the threaded through hole is internally threaded with a first threaded rod capable of extruding the circular ring to move downwards along the second sliding groove.

Through adopting above-mentioned technical scheme, rotate first threaded rod and make first threaded rod promote the ring and slide along the second spout gliding, the ring gliding in-process drives connecting block and the first spring of extrusion piece gliding compression, the extrusion piece gliding in-process extrudees first sealing ring, hug closely the valve rod after first sealing ring pressurized deformation, thereby make valve rod and first sealing ring contact site have good leakproofness, when the packing pad takes place fatigue, the leakproofness of valve body is difficult for receiving great influence under the sealed effect of first sealing ring.

Preferably, a first flange is connected to the outer side wall, close to the placing groove, of the valve body in a threaded manner; the support mechanism comprises a second seal ring; the second sealing ring is sleeved outside the sealing cover, and a third inclined plane is arranged on the inner side wall of the second sealing ring, which is in contact with the sealing cover; a fourth inclined plane matched with the third inclined plane is arranged on the outer side wall of the sealing cover contacted with the sealing ring; the top of the second sealing ring is provided with a pressing ring sleeved outside the sealing cover; a second flange is arranged on the top cover of the pressure ring; the second flange is connected with the first flange through bolt pieces.

Through adopting above-mentioned technical scheme, establish second sealing ring and clamping ring in proper order in sealed lid outside, establish the second flange lid in the clamping ring outside again, carry out fixed connection with second flange and first flange through the bolt spare, the second flange promotes the clamping ring gliding, the clamping ring gliding in-process promotes the second sealing ring and hugs closely sealed lid outside, make sealed lid remain stable in the standing groove, when sealed position in the valve body of lid receives the impact of medium, under the cooperation work on third inclined plane and fourth inclined plane, sealed lid extrusion second sealing ring warp and plugs up the gap, and then make second sealing ring and sealed contact site have good leakproofness, reduce the possibility that the valve body took place to leak.

Preferably, a first threaded hole is formed in the top of the second flange; the cover plate comprises a pressing plate; the pressing plate cover is arranged at the top of the pressing sleeve, and a through hole is formed in the top of the pressing plate; the first threaded hole is internally threaded with a stud; the end part of the stud, far away from the second flange, penetrates through the through hole to extend to the top of the pressing plate, and the outer side wall of the stud, extending to the top of the pressing plate, is connected with a first nut in a threaded mode.

Through adopting above-mentioned technical scheme, fix stud one end into first threaded hole, pass the through-hole on the clamp plate again behind the stud lid establish at the pressure cover top, screw up first nut and fix the clamp plate and make the clamp plate promote the pressure cover and move down and squeeze tight packing pad for packing pad pressurized deformation hugs closely the valve rod lateral wall.

Preferably, the top of the second flange is fixedly connected with an upright post; the top of the upright post is fixedly connected with a third flange through a fixing screw; a second threaded hole is formed in the third flange; the second threaded hole is coaxial with the valve rod, and a second threaded rod is connected with the second threaded hole in an internal thread mode; an end cover is fixedly connected to the bottom of the second threaded rod; the end part of the valve rod close to the end cover is inserted into the end cover, the end part of the valve rod far away from the end cover extends into the valve body, and the end part of the valve rod extending into the valve body is fixedly connected with a valve clack; and a fixing piece for fixing the valve rod is arranged in the end cover.

Through adopting above-mentioned technical scheme, with the third flange through the mounting screw make the valve rod keep away from the tip of valve clack insert establish into the end cover inside, advance fixedly to the valve rod through the mounting that sets up in the end cover for the end cover drives the valve rod and moves down when rotating the second threaded rod and move down, realizes closing valve body inside medium passageway through the valve clack of valve rod bottom.

Preferably, an annular groove is formed in the outer side wall of the valve rod extending into the end cover; a pair of placing holes are formed in the inner side wall of the end cover at positions corresponding to the annular groove; a third threaded hole is formed in the inner side wall, far away from the valve rod, of the placing hole; the fixing piece comprises a steel ball; the steel ball is arranged in the placing hole, and the outer side wall of the steel ball is matched with the inner side wall of the annular groove; a set screw is connected with the inner thread of the third threaded hole; the end part of the set screw close to the steel ball can push the steel ball to contact with the inner wall of the annular groove.

Through adopting above-mentioned technical scheme, the tip of keeping away from the valve clack with the valve rod is inserted and is established inside the end cover, and it is downthehole to install into placing the steel ball, again with holding screw in third screw hole in, during holding screw in third screw hole promotes the arc wall on the steel ball embedding valve rod lateral wall, and then realizes the installation of valve rod on the end cover.

Preferably, a clamping block is fixedly connected to the end part, far away from the end cover, of the second threaded rod; a hand wheel is sleeved outside the fixture block, and a third threaded rod is fixedly connected to the top of the fixture block; (ii) a And a second nut is connected to the external thread of the third threaded rod.

By adopting the technical scheme, the hand wheel is sleeved outside the clamping block, the second nut is sleeved outside the third threaded rod and is screwed down, the hand wheel is fixed through the second nut, and the hand wheel is convenient for a worker to rotate to drive the second threaded rod to move downwards.

Preferably, a flat washer is sleeved outside the third threaded rod; the flat washer is located between the second nut and the hand wheel.

Through adopting above-mentioned technical scheme, the setting of plain washer has promoted the fixed effect of second nut to the hand wheel for the difficult emergence of rotation after the fixture block outside is established to the hand wheel cover.

Preferably, the outer side wall of the inlet end of the valve body is in threaded connection with a fourth flange, and the outer side wall of the outlet end of the valve body is in threaded connection with a fifth flange.

Through adopting above-mentioned technical scheme, the setting of fourth flange and fifth flange is convenient for be connected of pipeline and valve body, is connected through the screw thread between fourth flange, fifth flange and valve body, and the installation and the dismantlement of third flange, fourth flange on the valve body of being convenient for.

In summary, the present application has the following beneficial effects:

1. the sealing cover is installed into the valve body, the concave seat is installed into the sealing cover, the packing cushions are sequentially installed inside the concave seat and then are pressed tightly through the pressing sleeve and the pressing plate, the packing cushions are pressed and deformed to be tightly attached to the side wall of the valve rod, so that the contact part of the packing cushions and the valve rod has good sealing performance, when the packing cushions are pressed by the pressing sleeve, the packing cushions extrude the connecting blocks to move downwards, the extruding blocks compress the first spring and extrude the first sealing ring, the first sealing ring is pressed and deformed to be tightly attached to the outer side wall of the valve rod, so that the contact part of the valve rod and the first sealing ring has good sealing performance, the integral sealing performance of the valve body is improved, and the sealing effect of the valve body is not easily influenced greatly when the packing material is fatigued;

2. when the valve rod is not tightly contacted with the first sealing ring, the first threaded rod is rotated to extrude the circular ring to slide downwards along the second sliding groove, the circular ring drives the connecting block and the extruding block to move downwards, the extruding block extrudes the first sealing ring to deform under the cooperation of the first inclined surface and the second inclined surface, so that the first sealing ring is tightly attached to the outer side wall of the valve rod, the contact part of the first sealing ring and the valve rod has better sealing performance, and the first sealing ring is not easy to generate a larger gap with the valve rod after a long time to influence the sealing effect of the valve body;

3. when the part of the sealing cover in the valve body is impacted by a medium, the sealing cover extrudes the second sealing ring to deform to plug the gap under the matching work of the third inclined surface and the fourth inclined surface, so that the contact part of the second sealing ring and the sealing cover has good sealing performance, and the possibility of leakage of the valve body is reduced.

Drawings

FIG. 1 is a schematic structural view of a PTA high pressure angle shutoff valve;

FIG. 2 is a schematic sectional view of a PTA high-pressure angle stop valve;

FIG. 3 is a schematic view of the mating structure of the female socket, the second rubber ring and the deck member of the present application;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is a schematic view of a valve stem, end cap and second threaded rod connection of the present application;

FIG. 6 is a schematic illustration of the mating arrangement of the end cap, valve stem and retainer of the present application;

description of reference numerals: 1. a valve body; 11. a placement groove; 12. a first flange; 13. a fourth flange; 14. a fifth flange; 2. a sealing cover; 21. a first groove; 22. a fourth slope; 3. a valve stem; 31. a valve clack; 32. an annular groove; 4. a concave seat; 41. a second groove; 42. a first seal ring; 421. a first inclined plane; 43. a first chute; 44. an extrusion assembly; 441. connecting blocks; 442. extruding the block; 443. a first spring; 444. a second inclined plane; 445. a circular ring; 45. a second chute; 46. a threaded through hole; 461. a first threaded rod; 5. a filler pad; 51. pressing a sleeve; 52. a deck member; 521. pressing a plate; 522. a through hole; 523. a stud; 524. a first nut; 6. a support mechanism; 61. a second seal ring; 611. a third inclined plane; 62. pressing a ring; 63. a second flange; 631. a first threaded hole; 64. a bolt member; 65. a column; 651. a set screw; 66. a third flange; 661. a second threaded hole; 67. a second threaded rod; 68. an end cap; 681. placing holes; 682. a third threaded hole; 69. a fixing member; 691. a steel ball; 692. tightening the screw; 7. a clamping block; 71. a hand wheel; 72. a third threaded rod; 73. a second nut; 74. a flat washer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that, as used in the following description, the terms "front," "rear," "left," "right," "upper," "lower," "bottom" and "top" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The invention discloses a PTA high-pressure angle type stop valve, which comprises a valve body 1, as shown in figures 1 and 2; the top of the valve body 1 is provided with a placing groove 11 communicated with the interior of the valve body 1; a sealing cover 2 is arranged in the placing groove 11; a valve rod 3 is arranged in the sealing cover 2; a first flange 12 is connected to the outer side wall of the valve body 1 close to the placing groove 11 in a threaded manner; the top of the valve body 1 is provided with a supporting mechanism 6 which can fix the sealing cover 2; the support mechanism 6 comprises a second sealing ring 61, a press ring 62 and a second flange 63; the second sealing ring 61 is sleeved outside the sealing cover 2, and a third inclined surface 611 is arranged on the inner side wall of the second sealing ring 61, which is in contact with the sealing cover 2; a fourth inclined surface 22 matched with the third inclined surface 611 is arranged at the contact part of the sealing cover 2 and the second sealing ring 61; the pressing ring 62 is sleeved outside the sealing cover 2, and the bottom of the pressing ring 62 is in contact with the top of the second sealing ring 61; a second flange 63 is covered on the top of the compression ring 62, and the second flange 63 is tightly connected with the first flange 12 through a group of bolt pieces 64.

When the valve is installed, the first flange 12 is installed on the outer side wall, close to the placing groove 11, of the valve body 1, then the sealing cover 2 provided with the valve rod 3 is inserted into the placing groove 11, then the second sealing ring 61 and the pressing ring 62 are sequentially sleeved outside the sealing cover 2, the second flange 63 is covered on the top of the pressing ring 62, the second flange 63 and the first flange 12 are fastened and connected through the bolt piece 64, the second flange 63 abuts against the pressing ring 62 and extrudes the second sealing ring 61, and the sealing cover 2 is kept stable in the placing groove 11 under the action of extrusion force; when the part of the sealing cover 2 located in the valve body 1 is impacted by a medium, under the matching work of the third inclined surface 611 and the fourth inclined surface 22, the sealing cover 2 extrudes the second sealing ring 61 to deform to block a gap, so that the contact part of the second sealing ring 61 and the sealing cover 2 has good sealing performance, and the possibility of leakage of the valve body 1 is reduced.

As shown in fig. 2 and 3, the top of the sealing cover 2 is provided with a first groove 21; the first groove 21 is internally provided with a concave seat 4 sleeved outside the valve rod 3; a plurality of packing pads 5 sleeved outside the valve rod 3 are arranged in the concave seat 4; the top of the packing pad 5 is provided with a pressing sleeve 51 sleeved outside the valve rod 3; the top of the second flange 63 is provided with a pair of first threaded holes 631; the top of the second flange 63 is provided with a cover plate part 52 which drives the pressing sleeve 51 to move downwards to press the packing pad 5; the cover plate member 52 includes a pressing plate 521 sleeved outside the valve rod 3, a pair of studs 523, and a pair of first nuts 524; the pressing plate 521 is covered on the top of the pressing sleeve 51, and the top of the pressing plate 521 is provided with a pair of through holes 522; one end of the stud 523 penetrates through the through hole 522 and then is connected in the first threaded hole 631 in a threaded manner, and the other end of the stud 523 penetrates through the through hole 522 and extends to the top of the pressure plate 521; a first nut 524 is threaded onto the outer sidewall of the stud 523 that extends to the top of the pressure plate 521.

After the concave seat 4 is placed in the first groove 21, the plurality of packing pads 5 are sequentially sleeved outside the valve rod 3 and then installed inside the concave seat 4, then the pressing sleeve 51 is sleeved on the valve rod 3 and then installed on the top of the packing pad 5, so that the bottom of the pressing sleeve 51 is contacted with the top of the packing pad 5 on the uppermost layer, and then the pressing plate 521 is sleeved on the valve rod 3 and then covered on the top of the pressing sleeve 51; through fixing stud 523 one end into first screw hole 631, tighten first nut 524 again and fix clamp plate 521 and make clamp plate 521 promote the pressure sleeve 51 and move down and crowd tight packing pad 5, packing pad 5 receives the compressive deformation and hugs closely the valve rod 3 lateral wall for packing pad 5 and valve rod 3 contact site have good leakproofness, reduce the possibility that valve body 1 takes place the leakage.

As shown in fig. 3 and 4, a second groove 41 is provided on the side wall of the concave seat 4 close to the valve stem 3; a first sealing ring 42 sleeved outside the valve rod 3 is arranged in the second groove 41; a pair of first sliding grooves 43 are arranged on the inner side wall of the top end of the second groove 41; a pressing assembly 44 which can be driven by the packing pad 5 to press the first sealing ring 42 against the valve rod 3 is arranged in the pair of first sliding grooves 43; the pressing assembly 44 includes a pressing block 442, a pair of connecting blocks 441, and a pair of first springs 443; the pressing block 442 is slidably connected to the inner side wall of the second groove 41; a second inclined plane 444 is arranged on the side wall, close to the first sealing ring 42, of the extrusion block 442, and a first inclined plane 421 matched with the second inclined plane 444 is arranged on the outer side wall, far away from the valve rod 3, of the first sealing ring 42; one end of each of the pair of first springs 443 is fixed to the bottom of the pressing block 442, and the other end of each of the first springs 443 is fixed to the inner sidewall of the bottom end of the second groove 41; the pair of connecting blocks 441 is fixedly connected to the top of the extruding block 442, the connecting blocks 441 are in sliding fit with the inner side wall of the first sliding groove 43, and the top of the connecting blocks 441 extends out of the first sliding groove 43 to be in contact with the bottom of the lowermost packing pad 5.

When the packing pad 5 is pressed by the pressing sleeve 51 to exert an extrusion force, the packing pad 5 at the bottommost layer extrudes the connecting block 441 to slide downwards along the first sliding groove 43, so that the extrusion block 442 at the bottom of the connecting block 441 moves downwards to compress the first spring 443 and extrude the first sealing ring 42, under the cooperation of the first inclined surface 421 and the second inclined surface 444, the extrusion block 442 extrudes the side wall of the first sealing ring 42, the first sealing ring 42 is pressed and deformed to be tightly attached to the outer side wall of the valve rod 3, so that the contact part of the valve rod 3 and the first sealing ring 42 has good sealing performance, and the whole sealing performance of the valve body 1 is improved.

As shown in fig. 3 and 4, a second sliding chute 45 is arranged on the inner side wall of the first sliding chute 43 away from the valve rod 3; the top of the second chute 45 is provided with a pair of threaded through holes 46; the outer side wall of the extrusion block 442 away from the valve rod 3 is fixedly connected with a circular ring 445; the circular ring 445 is in sliding fit with the inner side wall of the second sliding groove 45; a first threaded rod 461 is screwed into the pair of threaded through holes 46, and the first threaded rod can press the annular ring 445 to move down along the second sliding groove 45.

When the valve rod 3 is not tightly contacted with the first sealing ring 42, the first threaded rod 461 is rotated to press the circular ring 445 to slide downwards along the second sliding groove 45, the circular ring 445 drives the connecting block 441 and the pressing block 442 to move downwards, the pressing block 442 presses the first sealing ring 42 in the downward moving process to enable the first sealing ring 42 to be tightly attached to the outer side wall of the valve rod 3, the contact part of the first sealing ring 42 and the valve rod 3 keeps good sealing performance,

as shown in fig. 2 and 5, a pair of columns 65 are fixed on the top of the second flange 63; the pair of upright columns 65 are respectively positioned at two sides of the valve rod 3, and the tops of the upright columns 65 are fixedly connected with third flanges 66 through fixing screws 651; a second threaded hole 661 is formed in the top of the third flange 66 at a position coaxial with the valve rod 3; a second threaded rod 67 is connected with the second threaded hole 661 in an internal thread manner; an end cover 68 is fixedly connected to the bottom of the second threaded rod 67; the end part of the second threaded rod 67 far away from the end cover 68 is fixedly connected with a fixture block 7; a hand wheel 71 is sleeved outside the fixture block 7, and a third threaded rod 72 is fixedly connected to the top of the fixture block 7; a flat washer 74 is sleeved outside the third threaded rod 72, and a second nut 73 is connected to the outer side wall, located at the top of the flat washer 74, of the third threaded rod 72 in a threaded manner; the end part of the valve rod 3 close to the end cover 68 is inserted into the end cover 68, the end part of the valve rod 3 far away from the end cover 68 extends into the valve body 1, and the end part of the valve rod 3 extending into the valve body 1 is fixedly connected with the valve clack 31; the valve flap 31 is integrally formed with the valve rod 3; the end cap 68 is provided internally with a fixing member 69 for fixing the valve stem 3.

The end part of the valve rod 3 far away from the valve clack 31 is inserted into the end cover 68, the valve rod 3 is fixed through the fixing piece 69 arranged in the end cover 68, the end cover 68 drives the valve rod 3 to move downwards when the second threaded rod 67 is rotated to move downwards, the valve clack 31 at the bottom of the valve rod 3 is used for closing a medium channel in the valve body 1, the valve clack 31 and the valve rod 3 are integrally formed, so that the valve rod 3 is more stably connected with the valve clack 31, the possibility that the valve clack 31 and the valve rod 3 fall off due to corrosive media in a long-term use process is reduced, the hand wheel 71 is convenient to rotate the second threaded rod 67, and the flat gasket 74 arranged between the second threaded rod and the hand wheel 71 improves the fixing effect of the second nut 73 on the hand wheel 71.

As shown in fig. 5 and 6, the outer side wall of the valve rod 3 extending into the end cap 68 is provided with a ring-shaped groove 32; a pair of placing holes 681 are formed in the inner side wall of the end cover 68 at positions corresponding to the annular groove 32; a third threaded hole 682 is formed in the inner side wall of the pair of placing holes 681 far away from the valve rod 3; the mount 69 includes a pair of steel balls 691 and a pair of set screws 692; a pair of steel balls 691 are respectively arranged in the pair of placing holes 681, and the outer side walls of the steel balls 691 are matched with the inner side walls of the annular grooves 32; a set screw 692 is attached within third threaded aperture 682; the end of set screw 692 adjacent steel ball 691 pushes steel ball 691 into contact with the inner wall of annular groove 32.

Insert the end of valve rod 3 far away from valve clack 31 and establish inside end cover 68, install steel ball 691 again and place in the hole 681, in then with holding screw 692 screw in third screw hole 682, rotate holding screw 692 and make holding screw 692 promote in the arc wall on steel ball 691 embedding valve rod 3 lateral wall for steel ball 691 carries on spacingly to valve rod 3, realizes being connected of end cover 68 and valve rod 3, makes valve rod 3 be difficult for droing.

As shown in fig. 1, the outer side wall of the inlet end of the valve body 1 is in threaded connection with a fourth flange 13, and the outer side wall of the outlet end of the valve body 1 is in threaded connection with a fifth flange 14; the fourth flange 13 and the fifth flange 14 are arranged to facilitate connection of a pipeline and the valve body 1, and the fourth flange 13, the fifth flange 14 and the valve body 1 are connected through threads to facilitate installation and disassembly of the third flange 66 and the fourth flange 13 on the valve body 1.

The working principle is as follows: when the valve is installed, the first flange 12 is installed on the outer side wall, close to the placing groove 11, of the valve body 1, the sealing cover 2 provided with the valve rod 3 is inserted into the placing groove 11, the second sealing ring 61 and the pressing ring 62 are sequentially sleeved outside the sealing cover 2, the second flange 63 is sleeved outside the sealing cover 2 and covered on the top of the pressing ring 62, the second flange 63 is tightly connected with the first flange 12 through the bolt 64, the second flange 63 tightly abuts against the pressing ring 62 and extrudes the second sealing ring 61, and the sealing cover 2 is further kept stable in the placing groove 11; then, the concave seat 4 is sleeved outside the valve rod 3 and then installed in the first groove 21 at the top of the sealing cover 2, then, a plurality of packing pads 5 are sequentially sleeved outside the valve rod 3 and then installed into the concave seat 4, the pressing sleeve 51 is sleeved at the top of the packing pads 5, then, the pressing plate 521 is sleeved on the valve rod 3 and then covered at the top of the pressing sleeve 51, one end of the stud 523 penetrates through the through hole 522 and then is screwed into the first threaded hole 631, then, the first nut 524 is installed at the other end of the stud 523, the first nut 524 is screwed so that the first nut 524 pushes the pressing plate 521 to slide downwards and presses the pressing sleeve 51 to move downwards, and in the downward moving process of the pressing sleeve 51, the packing pad 5 deforms under the action of the extrusion force and clings to the outer side wall of the valve rod 3, so that the contact part of the valve rod 3 and the packing pad 5 has good sealing performance; when the packing pad 5 is pressed by the pressing sleeve 51, the packing pad 5 presses the connecting block 441 in the first sliding groove 43 to slide downwards along the first sliding groove 43, so that the pressing block 442 at the bottom of the connecting block 441 moves downwards to compress the first spring 443 and press the first sealing ring 42, the first sealing ring 42 is pressed and deformed to be tightly attached to the outer side wall of the valve rod 3, the contact part of the valve rod 3 and the first sealing ring 42 has good sealing performance, and the whole sealing performance of the valve body 1 is improved; then, a third flange 66 provided with a second threaded rod 67 is arranged at the top of the upright post 65, the third flange 66 and the upright post 65 are fastened and connected through a fixing screw 651, the end part, away from the valve clack 31, of the valve rod 3 is inserted into the end cover 68, a steel ball 691 is arranged in the placing hole 681, a set screw 692 is screwed into the third threaded hole 682, and the set screw 692 is screwed into the third threaded hole 682 to push the steel ball 691 to be embedded into an arc-shaped groove on the outer side wall of the valve rod 3, so that the valve rod 3 is arranged on the end cover 68; after the hand wheel 71 is sleeved outside the fixture block 7, a flat washer 74 is sleeved outside the third threaded rod 72, then the second nut 73 is installed outside the third threaded rod 72, the second nut 73 is screwed down to enable the second nut 73 to tightly press the flat washer 74 and then tightly press the hand wheel 71, so that the hand wheel 71 is kept stable, and finally the fourth flange 13 and the fifth flange 14 are respectively installed on the valve body 1, so that the valve body 1 can be conveniently connected with a pipeline; when the packing pad 5 is fatigued, the sealing performance of the valve body 1 is not greatly influenced under the sealing action of the first sealing ring 42; when the valve rod 3 is not tightly contacted with the first sealing ring 42, the first threaded rod 461 is rotated to extrude the circular ring 445 to slide downwards along the second sliding groove 45, the circular ring 445 drives the connecting block 441 and the extruding block 442 to move downwards, the extruding block 442 extrudes the first sealing ring 42 to deform under the matching work of the first inclined surface 421 and the second inclined surface 444, so that the first sealing ring 42 is tightly attached to the outer side wall of the valve rod 3, and the contact part of the first sealing ring 42 and the valve rod 3 has better sealing performance; when the part of the sealing cover 2 located in the valve body 1 is impacted by a medium, under the cooperation of the third inclined surface 611 and the fourth inclined surface 22, the sealing cover 2 extrudes the second sealing ring 61 to deform and block a gap, so that the contact part of the second sealing ring 61 and the sealing cover 2 has good sealing performance, and the possibility of leakage of the valve body 1 is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

The PTA high pressure angle formula stop valve which characterized in that: comprises a valve body (1); the top of the valve body (1) is provided with a placing groove (11) communicated with the interior of the valve body (1); a sealing cover (2) is arranged in the placing groove (11); the valve rod (3) is arranged in the sealing cover (2), and a first groove (21) is formed in the top of the sealing cover (2); a concave seat (4) sleeved outside the valve rod (3) is arranged in the first groove (21); a packing pad (5) sleeved outside the valve rod (3) is arranged in the concave seat (4); the top of the packing pad (5) is provided with a pressing sleeve (51) sleeved outside the valve rod (3); the top of the valve body (1) is provided with a supporting mechanism (6) which can fix the sealing cover (2); the supporting mechanism (6) is provided with a cover plate part (52) which drives the pressing sleeve (51) to move downwards to extrude the packing pad (5); the valve rod (3) is in threaded fit connection with the support mechanism (6); a second groove (41) is formed in the side wall, close to the valve rod (3), of the concave seat (4); a first sealing ring (42) sleeved outside the valve rod (3) is arranged in the second groove (41); a first sliding groove (43) is formed in the inner side wall of the top end of the second groove (41); and a squeezing assembly (44) which can drive the first sealing ring (42) to be squeezed to be tightly attached to the valve rod (3) by the packing pad (5) is arranged in the first sliding groove (43).
2. The PTA high pressure angle stop valve of claim 1, wherein: a first inclined plane (421) is arranged on the outer side wall, away from the valve rod (3), of the first sealing ring (42); the extrusion assembly (44) comprises a connecting block (441); the connecting block (441) is connected to the inner side wall of the first sliding groove (43) in a sliding mode, the connecting block (441) extends out of the top of the first sliding groove (43) to be in contact with the bottom of the packing pad (5), and the bottom of the connecting block (441) is fixedly connected with a squeezing block (442); the extrusion block (442) is in sliding fit with the inner side wall of the second groove (41), the bottom of the extrusion block (442) is connected with the inner side wall of the bottom end of the second groove (41) through a first spring (443), and a second inclined surface (444) matched with the first inclined surface (421) is arranged on the inner side wall, close to the first inclined surface (421), of the extrusion block (442); the second inclined surface (444) is in contact with the first inclined surface (421).
3. The PTA high pressure angle stop valve of claim 2, wherein: a second sliding groove (45) is formed in the inner side wall, far away from the valve rod (3), of the first sliding groove (43); the top of the second sliding chute (45) is provided with a threaded through hole (46); a circular ring (445) is fixedly connected to the outer side wall, far away from the valve rod (3), of the extrusion block (442); the circular ring (445) is in sliding fit with the inner side wall of the second sliding groove (45); the threaded through hole (46) is internally threaded with a first threaded rod (461) which can extrude the circular ring (445) to move downwards along the second sliding groove (45).
4. The PTA high pressure angle stop valve of claim 1, wherein: a first flange (12) is connected to the outer side wall, close to the placing groove (11), of the valve body (1) in a threaded mode; the support mechanism (6) comprises a second sealing ring (61); the second sealing ring (61) is sleeved outside the sealing cover (2), and a third inclined plane (611) is arranged on the inner side wall, in contact with the sealing cover (2), of the second sealing ring (61); a fourth inclined plane (22) matched with the third inclined plane (611) is arranged on the outer side wall of the sealing cover (2) contacted with the sealing ring; the top of the second sealing ring (61) is provided with a pressing ring (62) sleeved outside the sealing cover (2); a second flange (63) is covered at the top of the compression ring (62); the second flange (63) is connected to the first flange (12) by means of screw members (64).
5. The PTA high pressure angle stop valve of claim 4, wherein: a first threaded hole (631) is formed in the top of the second flange (63); the deck member (52) includes a platen (521); the pressing plate (521) is covered on the top of the pressing sleeve (51), and a through hole (522) is formed in the top of the pressing plate (521); a stud bolt (523) is connected with the first threaded hole (631) in an internal thread mode; the end part, far away from the second flange (63), of the stud (523) penetrates through the through hole (522) to extend to the top of the pressing plate (521), and the outer side wall, extending to the top of the pressing plate (521), of the stud (523) is connected with the first nut (524) in a threaded mode.
6. The PTA high pressure angle stop valve of claim 4, wherein: the top of the second flange (63) is fixedly connected with an upright post (65); the top of the upright post (65) is fixedly connected with a third flange (66) through a fixing screw (651); a second threaded hole (661) is formed in the third flange (66); the second threaded hole (661) is coaxial with the valve rod (3), and a second threaded rod (67) is connected with the second threaded hole (661) in an internal thread manner; an end cover (68) is fixedly connected to the bottom of the second threaded rod (67); the end part of the valve rod (3) close to the end cover (68) is inserted into the end cover (68), the end part of the valve rod (3) far away from the end cover (68) extends into the valve body (1), and the end part of the valve rod (3) extending into the valve body (1) is fixedly connected with a valve clack (31); and a fixing piece (69) for fixing the valve rod (3) is arranged in the end cover (68).
7. The PTA high pressure angle shut-off valve of claim 6, wherein: an annular groove (32) is formed in the outer side wall of the valve rod (3) extending into the end cover (68); a pair of placing holes (681) are formed in the inner side wall of the end cover (68) corresponding to the annular groove (32); a third threaded hole (682) is formed in the inner side wall, far away from the valve rod (3), of the placing hole (681); the fixture (69) comprises a steel ball (691); the steel ball (691) is arranged in the placing hole (681), and the outer side wall of the steel ball (691) is matched with the inner side wall of the annular groove (32); a set screw (692) is connected with the third threaded hole (682) in a threaded manner; the end of the set screw (692) close to the steel ball (691) can push the steel ball (691) to be in contact with the inner wall of the annular groove (32).
8. The PTA high pressure angle stop valve of claim 6, wherein: a clamping block (7) is fixedly connected to the end part, far away from the end cover (68), of the second threaded rod (67); a hand wheel (71) is sleeved outside the fixture block (7), and a third threaded rod (72) is fixedly connected to the top of the fixture block (7); and a second nut (73) is connected with the external thread of the third threaded rod (72).
9. The PTA high pressure angle stop valve of claim 8, wherein: a flat washer (74) is sleeved outside the third threaded rod (72); the flat washer (74) is located between the second nut (73) and the hand wheel (71).
10. The PTA high pressure angle stop valve of claim 1, wherein: and the outer side wall of the inlet end of the valve body (1) is in threaded connection with a fourth flange (13), and the outer side wall of the outlet end of the valve body (1) is in threaded connection with a fifth flange (14).