CN116398657A

CN116398657A - Plug valve

Info

Publication number: CN116398657A
Application number: CN202310310071.0A
Authority: CN
Inventors: 陈林; 徐翠翠; 施俊杰; 倪凯凯; 袁峰峰
Original assignee: Jiangsu Shentong Nuclear Power Equipment Co ltd
Current assignee: Jiangsu Shentong Nuclear Power Equipment Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-07-07

Abstract

The invention provides a plug valve, and relates to the field of plug valves. The plug valve comprises a shell, flanges are fixedly connected to the two ends of the shell, a fixed cover is fixedly connected to the upper end of the shell, a top cover is fixedly connected to the upper end of the fixed cover, a driving mechanism is arranged in one end of the top cover away from the fixed cover, a rotary lifting mechanism is arranged in the fixed cover, a rotary valve core is rotationally connected to the bottom end in the shell, valve seats are slidably connected to the two sides of the rotary valve core, sealing rings are fixedly connected to the valve seats, fixing grooves are formed in the two sides, close to the sealing rings, of the shell, self-adapting sealing strips are fixedly connected to the fixing grooves, a plurality of springs are fixedly connected to one sides, close to the fixing grooves, of the self-adapting sealing strips, and grooves are formed in one sides, close to the springs. Through the use of the rotary lifting mechanism and the self-adaptive sealing strip, the tightness is maintained even if the valve core and the valve seat are worn under the condition of long-time friction.

Description

Plug valve

Technical Field

The invention relates to the technical field of plug valves, in particular to a plug valve.

Background

The plug valve is a rotary valve in the shape of a closing member or a plunger, a passage opening on the plug valve is the same as or perpendicular to a passage opening on a valve body through rotating by 90 degrees, the shape of the plug valve can be cylindrical or conical, in a cylindrical plug, a passage is generally rectangular, in a conical plug, the passage is trapezoidal, in the plug valve, the valve seat is worn due to the fact that the valve seat is often rubbed with the valve seat when the valve seat is opened or closed, the valve seat cannot be tightly attached to pipelines at two ends of the valve body through extrusion when the valve seat moves downwards in a rotating mode, and the sealing effect of the valve seat on the pipelines is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a plug valve, which solves the problem of sealing performance reduction caused by abrasion of a valve core and a valve seat in the plug valve.

In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a plug valve, includes the shell, the both ends fixedly connected with flange of shell, the upper end fixedly connected with fixed cover of shell, the upper end fixedly connected with top cap of fixed cover, be provided with actuating mechanism in the one end that fixed cover was kept away from to the top cap, be provided with rotatory elevating system in the fixed cover, the bottom rotates in the shell and is connected with the rotation case, the equal sliding connection in both sides of rotation case has the disk seat, fixedly connected with sealing ring on the disk seat, the fixed slot has all been seted up to the both sides that are close to the sealing ring in the shell, fixedly connected with self-adaptation sealing strip in the fixed slot, one side that self-adaptation sealing strip is close to the fixed slot fixedly connected with a plurality of springs, the recess has been seted up to one side that self-adaptation sealing strip is close to the spring, a plurality of micropores have been seted up to one side that self-adaptation sealing strip kept away from the spring, the micropore is linked together with the recess.

Through the technical scheme, even if the valve core and the valve seat are used for a long time, the tightness can be kept through the self-adaptive sealing strip due to friction loss, so that the service life of the valve body is greatly prolonged.

Preferably, the driving mechanism comprises a driving shaft, the top cover is connected with the driving shaft in a penetrating and rotating manner in one end of the top cover, which is far away from the fixed cover, one end of the driving shaft is fixedly connected with a rotating wheel, one end of the driving shaft, which is far away from the rotating wheel, is fixedly connected with a hand crank, a hand crank outer rotating sleeve is provided with a protective sleeve, the upper end of the rotating and lifting mechanism is fixedly connected with a worm wheel, the worm wheel is matched with the worm in a meshed manner, the protective sleeve is made of plastic, and a plurality of anti-skid patterns are fixedly connected on the protective sleeve.

Through above-mentioned technical scheme, can drive the valve through rocking the hand crank and open or close, through the setting of runner and worm gear, can reduce the required strength of opening the valve.

Preferably, the rotary lifting mechanism comprises a rotating shaft, the top end of the rotating shaft is fixedly connected with a worm wheel, one end of the rotating shaft, which is close to the worm wheel, is fixedly connected with a fixing ring, the lower end of the fixing ring is fixedly connected with a limiting block, one end, which is far away from the worm wheel, of the rotating shaft is sleeved with a sleeve, one end, which is close to the sleeve, of the rotating shaft is fixedly connected with a screw rod, and one side of the top cover penetrates through the fixing ring and is fixedly connected with a limiting rod.

Through the technical scheme, the driving mechanism can control the opening and closing of the valve core by driving the rotary lifting mechanism.

Preferably, the screw thread is arranged in the sleeve, the screw rod is matched with the screw thread in a mutually meshed manner, one end of the screw rod, far away from the rotating shaft, is fixedly connected with the connecting rod, a limit groove is formed in the surface of one side of the sleeve, the limit rod is matched with the limit groove in a mutually sliding manner, and the limit groove is in an L-shaped arrangement.

Preferably, the upper end fixedly connected with fixed block of telescopic, the lower extreme of fixed block runs through fixedly connected with fixed pin, the fixed pin runs through fixedly connected transmission shaft, the upper end of transmission shaft runs through sliding connection connecting rod, the one end fixedly connected with rotation case that the telescopic was kept away from to the transmission shaft.

Through the technical scheme, under the cooperation of the sleeve, the screw rod, the limiting rod and the limiting block, the valve core can rotate firstly when being closed, the through hole and the pipeline move downwards after being 90 degrees, the valve seat is extruded to two sides through the conical lower end, the sealing rings on the valve seat extrude the two ends of the valve body to seal, the sealing effect is improved, and when the valve is opened, the valve core can be lifted firstly, so that the rotating friction force of the valve core is reduced, and the valve is opened more conveniently.

Preferably, the rotary valve core bottom is the toper setting, the equal fixedly connected with slider in both sides of rotary valve core, the spout has all been seted up to the inboard of disk seat, spout and the mutual sliding fit of slider, the disk seat is kept away from the equal fixedly connected with sealing ring in one side of rotary valve core, the through-hole has been seted up in the rotary valve core, the sealing ring is made by rubber, the through-hole is trapezoidal, the through-hole corner is the fillet setting.

Through the technical scheme, the rotary valve core can drive the valve seat to rotate, and the rotary valve core and the valve seat relatively slide to extrude the valve seat to move towards two ends, so that the sealing ring on the valve seat is sealed.

Preferably, the transmission shaft is close to telescopic one end overcoat and is equipped with the closing plate, one side that the closing plate is close to the transmission shaft fixedly connected with second sealing washer, one side that the closing plate is close to the fixed cover fixedly connected with first sealing washer, second sealing washer and first sealing washer are made by rubber, the upper surface of closing plate runs through a plurality of fixing bolt of threaded connection, fixing bolt runs through and rotates and connect the fixed cover, the closing plate is made by the stainless steel.

Through above-mentioned technical scheme, can seal the transmission shaft position on the valve, avoid inside liquid to reveal through the transmission shaft.

Preferably, the rotary valve core is made of stainless steel, the rotary valve core and the transmission shaft are integrally arranged, a plurality of round holes are formed in the flange, the shell is made of the stainless steel, and the top cover and the fixed cover are integrally arranged.

Through above-mentioned technical scheme, can make the valve stronger to reduce the risk of revealing.

Working principle: when the valve is opened, the rotating wheel 63 is rotated through the hand crank 64, the rotating wheel 63 is provided with the multifunctional worm 62 through the driving shaft 61, the worm 62 is matched with the worm gear 66 to drive the rotating shaft 71 to rotate, the rotating shaft 71 drives the screw rod 74 to rotate, the sleeve 75 is enabled to move upwards under the matching of the screw rod 74 and the sleeve 75, the sleeve 75 drives the transmission shaft 8 to move upwards through the fixing pin 9, when the limit rod 78 moves to the bottom of the sliding groove 77 and the fixing block 76 clamps the limit block 73, the rotating shaft 71 rotates to drive the sleeve 75 to rotate, thereby driving the rotating valve core 14 to rotate, the rotating valve core 14 drives the valve seat 17 to rotate through the sliding block 16, the through hole 15 is aligned with the openings at the two ends of the valve body, the valve is opened, when the valve is to be closed, the rotating wheel 63 is reversely rotated, the rotating valve core 14 reversely drives the valve seat 17 to return, the through hole 15 and the pipeline form an angle of 90 degrees, and then the sleeve 75 reaches the rightmost side of the sliding groove, the sleeve 75 can not continue to rotate at the moment, the rotating of the sleeve 75, the rotating shaft 71 causes the screw rod 74 to be matched with the sleeve 75 to move downwards, thereby driving the sleeve 75 to move downwards, the rotating valve core 14 downwards, the conical bottom of the rotating core 14 is pushed by the rotating shaft, the rotating core 14, the sealing bar 17 is pushed, the sealing strips 20 are pushed by the sealing strips 20, the sealing strips 20 are pressed by the sealing strips 20, the sealing strips 20 are matched with the sealing strips, and the sealing strips 20 are self-adapting to each other, and the sealing strips are made and the sealing strips.

The invention provides a plug valve. The beneficial effects are as follows:

according to the self-adaptive sealing device, the self-adaptive sealing strip is arranged in the shell, the self-adaptive sealing strip is pushed by the spring to be extruded with the sealing ring, the tightness of the interior of the valve body is improved, and the micro holes and the grooves are formed in the self-adaptive sealing strip, so that liquid in the pipeline can enter the fixing grooves, the liquid pressure at two ends of the self-adaptive sealing strip is equal, the situation that the gap between the self-adaptive sealing strip and the sealing ring is increased due to the fact that the self-adaptive sealing strip is pushed to move into the fixing grooves due to overlarge liquid pressure is avoided, the sealing effect is affected, and no matter what position a valve seat is worn, the self-adaptive sealing strip can be tightly attached to the sealing ring all the time, so that the sealing effect is not reduced.

According to the invention, the valve core is rotated and lifted up when being opened by the rotating lifting mechanism, the pressure on the valve seat is relaxed due to the conical arrangement of the lower end of the valve core, so that the valve is easier to open, and the valve seat is rotated and lowered down when being closed, the valve seats on two sides are extruded, so that the valve seat moves to two sides, and the sealing rings on the valve seat are tightly attached to the inlets and outlets on two ends of the valve body, so that a sealing effect is formed.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a cross-sectional view of the top cover of the present invention;

FIG. 3 is a block diagram of a valve cartridge of the present invention;

FIG. 4 is a cross-sectional view of the interior of the sleeve of the present invention;

FIG. 5 is a perspective view of the adaptive seal structure of the present invention;

fig. 6 is a cross-sectional view of the adaptive seal block diagram of the present invention.

Wherein, 1, the shell; 2. a flange; 3. a round hole; 4. a fixed cover; 5. a top cover; 6. a driving mechanism; 61. a drive shaft; 62. a worm; 63. a rotating wheel; 64. a hand crank; 65. a protective glove; 66. a worm wheel; 7. a rotary lifting mechanism; 71. a rotating shaft; 72. a fixing ring; 73. a limiting block; 74. a screw rod; 75. a sleeve; 76. a fixed block; 77. a limit groove; 78. a limit rod; 79. a connecting rod; 8. a transmission shaft; 9. a fixing pin; 10. a sealing plate; 11. a fixing bolt; 12. a first seal ring; 13. a second seal ring; 14. rotating the valve core; 15. a through hole; 16. a slide block; 17. a valve seat; 18. a seal ring; 19. a chute; 20. self-adaptive sealing strips; 21. micropores; 22. a groove; 23. a spring; 24. a fixing groove.

Description of the embodiments

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples

As shown in fig. 1, fig. 5 and fig. 6, the embodiment of the invention provides a plug valve, which comprises a housing 1, flange 2 is fixedly connected to two ends of housing 1, fixed cover 4 is fixedly connected to the upper end of housing 1, top cover 5 is fixedly connected to the upper end of fixed cover 4, driving mechanism 6 is arranged in one end of top cover 5 far away from fixed cover 4, rotary lifting mechanism 7 is arranged in fixed cover 4, rotary valve core 14 is rotatably connected to the bottom in housing 1, valve seat 17 is slidingly connected to two sides of rotary valve core 14, sealing ring 18 is fixedly connected to valve seat 17, fixed grooves 24 are formed in two sides of housing 1 near sealing ring 18, adaptive sealing strip 20 is fixedly connected to a plurality of springs 23 in one side of adaptive sealing strip 20 near fixed grooves 24, groove 22 is formed in one side of adaptive sealing strip 20 near springs 23, a plurality of micropores 21 are formed in one side of adaptive sealing strip 20 far away from springs 23, micropores 21 are communicated with grooves 22, rotary valve core 14 is made of stainless steel, rotary valve core 14 and 8 are integrally arranged, circular hole 3 is formed in flange 2, housing 1 is integrally made of stainless steel cover 4 and is integrally arranged with top cover 5.

As shown in fig. 2, 3 and 4, the upper end of the sleeve 75 is fixedly connected with a fixed block 76, the lower end of the fixed block 76 is fixedly connected with a fixed pin 9 in a penetrating manner, the fixed pin 9 is fixedly connected with a transmission shaft 8 in a penetrating manner, the upper end of the transmission shaft 8 is connected with a connecting rod 79 in a penetrating manner, one end of the transmission shaft 8 far away from the sleeve 75 is fixedly connected with a rotary valve core 14, the bottom end of the rotary valve core 14 is arranged in a conical manner, both sides of the rotary valve core 14 are fixedly connected with sliding blocks 16, the inner side of the valve seat 17 is provided with sliding grooves 19, the sliding grooves 19 and the sliding blocks 16 are in sliding fit with each other, one side of the valve seat 17 far away from the rotary valve core 14 is fixedly connected with a sealing ring 18, the through hole 15 is formed in the rotary valve core 14, the sealing ring 18 is made of rubber, the through hole 15 is trapezoidal, the corner of the through hole 15 is a round corner, a sealing plate 10 is sleeved outside one end, close to the sleeve 75, of the transmission shaft 8, one side, close to the transmission shaft 8, of the sealing plate 10 is fixedly connected with a second sealing ring 13, one side, close to the fixed cover 4, of the sealing plate 10 is fixedly connected with a first sealing ring 12, the second sealing ring 13 and the first sealing ring 12 are made of rubber, the upper surface of the sealing plate 10 is connected with a plurality of fixing bolts 11 in a penetrating thread mode, the fixing bolts 11 penetrate through the rotary connection fixed cover 4, and the sealing plate 10 is made of stainless steel.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A plug valve comprising a housing (1), characterized in that: the utility model discloses a sealing device for a micro-porous ceramic material, including shell (1), fixed cover (4) is fixed at the both ends fixedly connected with flange (2) of shell (1), fixed cover (4)'s upper end fixedly connected with top cap (5), be provided with actuating mechanism (6) in fixed cover (4) are kept away from to top cap (5), be provided with rotatory elevating system (7) in fixed cover (4), the bottom rotates in shell (1) and is connected with rotation case (14), the equal sliding connection in both sides of rotation case (14) has disk seat (17), fixedly connected with sealing ring (18) on disk seat (17), fixed slot (24) have all been seted up on the both sides that are close to sealing ring (18) in shell (1), fixedly connected with self-adaptation sealing strip (20) in the fixed slot (24), one side fixedly connected with a plurality of springs (23) are close to self-adaptation sealing strip (20), one side that self-adaptation sealing strip (20) is close to spring (23) is seted up recess (22), one side that self-adaptation sealing strip (20) is kept away from spring (23) is equipped with micropore (21), micropore (21) are linked together.

2. A plug valve according to claim 1, wherein: the driving mechanism (6) comprises a driving shaft (61), a driving shaft (61) is connected in a penetrating and rotating manner in one end of a top cover (5) far away from a fixed cover (4), one end of the driving shaft (61) is fixedly connected with a rotating wheel (63), one end of the driving shaft (61) far away from the rotating wheel (63) is fixedly connected with a worm (62), one side of the rotating wheel (63) far away from the driving shaft (61) is fixedly connected with a hand crank (64), a glove (65) is sleeved outside the hand crank (64), the upper end of the rotating and lifting mechanism (7) is fixedly connected with a worm wheel (66), the worm wheel (66) is matched with the worm (62) in a meshed manner, the glove (65) is made of plastics, and a plurality of anti-skid threads are fixedly connected on the glove (65).

3. A plug valve according to claim 1, wherein: the rotary lifting mechanism (7) comprises a rotating shaft (71), a worm wheel (66) is fixedly connected to the top end of the rotating shaft (71), a fixed ring (72) is fixedly connected to one end, close to the worm wheel (66), of the rotating shaft (71), a limiting block (73) is fixedly connected to the lower end of the fixed ring (72), a sleeve (75) is sleeved outside one end, far away from the worm wheel (66), of the rotating shaft (71), a screw rod (74) is fixedly connected to one end, close to the sleeve (75), of the rotating shaft (71), and a limiting rod (78) is fixedly connected to one side of the top cover (5) in a penetrating mode.

4. A plug valve according to claim 3, wherein: be provided with the screw thread in sleeve (75), lead screw (74) and screw thread intermeshing cooperation, one end fixedly connected with connecting rod (79) that pivot (71) were kept away from to lead screw (74), spacing groove (77) have been seted up on one side surface of sleeve (75), spacing rod (78) and spacing groove (77) mutually sliding fit, spacing groove (77) are L type setting.

5. A plug valve according to claim 3, wherein: the upper end fixedly connected with fixed block (76) of sleeve (75), fixed pin (9) are run through fixedly connected with in the lower extreme of fixed block (76), fixed pin (9) run through fixedly connected transmission shaft (8), sliding connection connecting rod (79) are run through to the upper end of transmission shaft (8), one end fixedly connected with rotation case (14) that sleeve (75) were kept away from to transmission shaft (8).

6. A plug valve according to claim 1, wherein: the rotary valve core is characterized in that the bottom end of the rotary valve core (14) is arranged in a conical manner, sliding blocks (16) are fixedly connected to the two sides of the rotary valve core (14), sliding grooves (19) are formed in the inner sides of valve seats (17), the sliding grooves (19) are in sliding fit with the sliding blocks (16), a sealing ring (18) is fixedly connected to one side, far away from the rotary valve core (14), of the valve seats (17), a through hole (15) is formed in the rotary valve core (14), the sealing ring (18) is made of rubber, the through hole (15) is trapezoid, and corner parts of the through hole (15) are round corners.

7. A plug valve according to claim 5, wherein: the one end overcoat that transmission shaft (8) is close to sleeve (75) is equipped with closing plate (10), one side fixedly connected with second sealing washer (13) that closing plate (10) is close to transmission shaft (8), one side fixedly connected with first sealing washer (12) that closing plate (10) is close to fixed lid (4), second sealing washer (13) and first sealing washer (12) are made by rubber, the upper surface of closing plate (10) runs through a plurality of fixing bolt (11) of threaded connection, fixing bolt (11) runs through rotation and connects fixed lid (4), closing plate (10) are made by the stainless steel.

8. A plug valve according to claim 1, wherein: the rotary valve core (14) is made of stainless steel, the rotary valve core (14) and the transmission shaft (8) are integrally arranged, a plurality of round holes (3) are formed in the flange (2), the shell (1) is made of the stainless steel, and the top cover (5) and the fixed cover (4) are integrally arranged.