CN210265979U

CN210265979U - Eccentric full-bore ball valve with asymmetric sealing structure

Info

Publication number: CN210265979U
Application number: CN201921203369.7U
Authority: CN
Inventors: 臧兴华; 李捷; 翟兴学; 柳孝清; 陈礼福; 狄词平
Original assignee: China Valves Technology Changsha Co Ltd
Current assignee: China Valves Technology Changsha Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-04-07
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses an asymmetric seal structure's eccentric full latus rectum ball valve, including valve body, valve, the hard seal structure of portable differential pressure formula metal, fixed soft seal structure, the outer crank arm of valve body and manual lock spindle device, the hard seal structure of portable differential pressure formula metal sets up the department of intaking at the ball valve, fixed soft seal structure sets up the department of water outlet of ball valve, valve shaft central line and the parallel skew certain distance of valve body central line, and the crank arm passes through the valve shaft and links to each other with the valve internal valve to it is rotatory to drive the valve, and when the valve was in full-open or totally closed state, the manual lock spindle device that sets up on the crank arm can extract and drop into in the two stop pin covers that set up on the valve body. Compared with the prior art, the utility model discloses a structure and easy operation, the sealed maintenance of full latus rectum ball valve of eccentricity are fast, make with use cost low, the leakproofness is strong, and can not influence the continuous operation of ball valve when overhauing on line.

Description

Eccentric full-bore ball valve with asymmetric sealing structure

Technical Field

The utility model relates to a valve seal field especially relates to an asymmetric seal structure's eccentric full latus rectum ball valve.

Background

In the full-bore ball valve, the traditional manual and electric ball valve is not provided with eccentricity, the valve adopts a casting or steel plate welding mode, the valve forms a sealing pair (metal-to-metal hard sealing) by installing a valve sealing ring and a moving ring, and the sealing of the valve comprises an upstream working sealing pair and a downstream maintenance sealing pair. The two sets of sealing pairs drive the moving ring to be put in and pulled out through pressure water or pressure oil to realize the opening and closing of the ball valve, the ball valve with the movable differential pressure type metal hard sealing structure which is symmetrically arranged appears in the prior art, and for example, Chinese patents with application numbers of CN201820980822 and CN200420076986.2 disclose the movable differential pressure type metal hard sealing structure of the double-sealing ball valve. However, since the water system or the oil system of the movable differential pressure type metal hard sealing structure is matched with the ball valve, the control mode and the structure are complex, the manufacturing and using cost is high, the metal hard sealing structure is difficult to realize zero leakage, when a manual electric device or a transmission device, the sealing structure and the like have problems, the manual electric device or the transmission device needs to be disassembled and maintained for a long time, the continuous normal working time of the ball valve can not be ensured, and the utilization rate of the ball valve is influenced.

Therefore, it is urgently needed to design a full-diameter ball valve which has simpler structure, easier sealing and maintenance and lower manufacturing and using cost, and can ensure the sealing performance and operability of the valve at the same time.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Based on this, the utility model provides an asymmetric seal structure's eccentric full latus rectum ball valve, this eccentric full latus rectum ball valve's structure and easy operation, sealed maintenance are fast, manufacturing and use cost are low, the leakproofness is strong, and can not influence the continuous work of ball valve when overhauing on line.

(II) technical scheme

For solving the technical problem, the utility model provides an asymmetric seal structure's eccentric full latus rectum ball valve, including valve body, valve, the hard seal structure of portable differential pressure formula metal, fixed soft seal structure, the outer crank arm of valve body and manual lock spindle device, the hard seal structure of portable differential pressure formula metal sets up the department of intaking at the ball valve, fixed soft seal structure sets up the department of water outlet at the ball valve, and valve shaft central line and valve body central line parallel offset certain distance, the crank arm passes through the valve shaft and links to each other with the valve internal valve to it is rotatory to drive the valve, and when the valve was in full-open or totally-closed state, the manual lock spindle device that sets up on the crank arm can be extracted and drop into in two stop pin covers that set up on the valve body.

Furthermore, the movable differential pressure type metal hard sealing structure comprises a valve sealing ring fixed on the valve through a screw, a moving ring doing linear motion and a supporting ring fixed on the valve body, water inlets and water outlets connected to a water system are respectively arranged on the valve body, the moving ring is movably arranged between the valve body and the supporting ring, the valve sealing ring matched with the conical surface of the moving ring, the supporting ring and the valve body form a space for placing the moving ring, and the water inlets and the water outlets respectively arranged on the supporting ring and the valve body are communicated with the space for placing the moving ring.

Furthermore, fixed soft seal structure has included fixed seal seat, the rubber seal who is fixed in on the valve body, fixed seal seat can closely cooperate between fixed seal seat and the rubber seal, forms a pair of work sealing pair.

Further, fixed soft seal structure still includes the clamping ring, rubber seal passes through the clamping ring and the recess of fix with screw on the valve that are located the below, rubber seal can pass through the clamping ring adjustment compression volume to guarantee zero leakage.

Furthermore, the central line of the valve shaft and the central line of the valve body are deviated in parallel in the vertical direction by a certain distance to form an eccentric distance in the vertical direction.

Further, the length of the eccentricity is 1-10 mm.

Furthermore, the fixed seal seat is made of stainless steel, and the rubber seal ring is made of NBR or EPDM.

Further, manual locking spindle device includes the hand wheel, with the lead screw of hand wheel connection, lock nut, bolt, dog, apron and set up the stop pin in the fixing base on the turning arm, the apron passes through the one end of bolt fastening on the fixing base, is equipped with the screw hole on the apron, screw hole and lead screw cooperation constitute a screw-nut structure, and when the valve was in full-open or totally-closed state, the stop pin can be extracted out and drop into in two stop pin covers that set up on the valve body, adopt conical surface structure cooperation between stop pin and the locking pin cover.

Furthermore, the manual ingot locking device further comprises a stop block, the stop block is in threaded fixed connection with an internal thread of a groove formed in the tail portion of the locking pin through an external thread, the tail end of the screw rod is of a truncated cone-shaped structure, the stop block is used for limiting the truncated cone-shaped structure to do linear motion, and the truncated cone-shaped structure can rotate freely in the groove in the tail portion of the locking pin.

Furthermore, manual locking spindle device still includes locating lever and locating lever nut, the locating lever passes through the locating lever nut to be fixed on the fixing base, the side of stop pin be equipped with the one end matched with spacing groove of locating lever, the spacing groove restriction locating lever can only carry out the removal of horizontal direction.

(III) advantageous effects

The utility model discloses compare with prior art, the beneficial effects of the utility model include:

1. the utility model discloses an asymmetric seal structure's eccentric full latus rectum ball valve changes the work seal structure in two portable differential pressure formula metal hard seal structure (ball valve is intake side and is overhauld seal structure and ball valve play water side work seal structure) into fixed soft seal structure, make fixed soft seal structure sealed as the common work that is located the low reaches, thereby need not to use rectilinear movement's metal hard seal structure under normal operating conditions, fixed soft seal structure need not water pressure or oil pressure drive, water system or oil system have been simplified, and water system switch board or oil system switch board need not join in marriage one with ball valve one, can regard as the specialized tool that removes, only need be connected the use with the ball valve when the ball valve needs online maintenance, manufacturing cost is reduced, control mode has been simplified. In addition, when the maintenance is carried out, the maintenance of the sealing structure can be completed only by quickly replacing the rubber sealing ring of the fixed soft sealing structure, and the maintenance operation is simple.

2. The utility model discloses an asymmetric seal structure's full latus rectum ball valve is through cooperation eccentric structure and manual locking spindle device for the valve can be guaranteed to eccentric connecting lever and is in full open or close the position entirely, has increased the moment of switch, and increases eccentric can guarantee that valve sealing washer and rubber seal can break away from fast.

3. Lead screw among the manual lock spindle device on the turning arm promotes the stop pin around passing through the block of dog and coming with the relative rotation of apron, the stop pin adopts conical surface cooperation with the locking pin cover, cooperation lock nut and locating lever to make the stop pin can be in the accurate stable extraction and the input in two upper and lower stop pin covers that correspond the full on-off position of valve, ensure that the valve is full on and the full off position is accurate, and the spacing groove of conical surface cooperation and stop pin one side can make the staff feedback learn whether the stop pin drops into in place.

Drawings

The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:

fig. 1 is a side view of an eccentric full bore ball valve of the asymmetric sealing structure of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

FIG. 3 is an enlarged schematic view of a portion of the movable differential pressure type metal hard seal structure for service in FIG. 1;

FIG. 4 is a schematic illustration of the manually operable mechanical locking pin of FIG. 1 in the C-C orientation in an extracted condition;

fig. 5 is a schematic view showing a state where the manual mechanical lock pin is put in the direction C-C in fig. 1.

Description of reference numerals:

1. the valve comprises a valve body, 2, a valve, 3, a pressing ring, 4, a rubber sealing ring, 5, a fixed sealing seat, 6, a valve sealing ring, 7, a moving ring, 8, a support ring, 9, a crank arm, 10, a locking pin, 11, a hand wheel, 12, a locking pin sleeve, 13, a screw rod, 14, a locking nut, 15, a bolt, 16, a cover plate, 17, a stop dog, 18, a positioning rod, 19 and a positioning rod nut.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

As shown in figures 1-5, the utility model discloses an eccentric full-bore ball valve with asymmetric sealing structure, which comprises a valve body 1 of the eccentric full-bore ball valve, a valve 2, a movable differential pressure type metal hard sealing structure, a fixed soft sealing structure, a crank arm 9 and a manual ingot locking device on the crank arm, wherein the movable differential pressure type metal hard sealing structure is arranged at a water inlet end, the fixed soft sealing structure is arranged at a water outlet end, the fixed soft sealing structure is arranged at the water outlet end of the downstream, so that the fixed soft sealing structure is used as a common working seal, the metal hard sealing structure which can move linearly under the normal working condition is not needed, the fixed soft sealing structure does not need water pressure or oil pressure driving, the operation control system is simplified, and a water system control cabinet or an oil system control cabinet does not need to be matched with the ball valve and can be used as a special moving, the ball valve is connected with the ball valve for use only when needing online maintenance, so that the manufacturing cost is reduced and the control mode is simplified while the online maintainability of the valve is ensured. In addition, when the maintenance is carried out, the maintenance of the sealing structure can be completed only by quickly replacing the rubber sealing ring of the fixed soft sealing structure, and the maintenance operation is simple.

In addition, the crank arm 9 outside the valve body 1 is connected with the valve 2 inside the valve body 1 through the valve shaft, thereby driving the valve 2 to rotate within the range of 90 degrees, thereby achieving the purpose of cutting off or connecting media, the center line of the valve shaft and the center line of the valve body 1 deviate a certain distance, thereby forming an eccentric full-bore ball valve, so that the asymmetric sealing structure ball valve of the utility model is easy to open and close, the zero leakage is ensured by adjusting the compression amount of the comparison sealing ring through the pressing ring so as to finally realize the zero leakage sealing, the eccentricity of the eccentric valve shaft corresponds to the size of the convex part of the rubber sealing ring 4 of the fixed soft sealing structure, because the utility model discloses a ball valve often is the medium and large-scale manual and electric ball valve of ball valve class, and the ball valve chi generally is 300 ~ 3000mm, so the eccentricity is preferred 1-10mm, guarantees that fixed seal seat 5 and rubber seal 4 carry out quick seal and break away from. Preferably, as shown in fig. 1, the valve shaft connected to one end of the crank arm 9 may be vertically offset from the center line of the valve body 1 to form a vertical eccentricity, thereby facilitating manual or electric control of the valve opening by an operator in the vertical direction.

As shown in fig. 2, the fixed soft sealing structure includes a fixed sealing seat 5 fixed on the valve body 1, a rubber sealing ring 4 and a pressing ring 3 fixed on the valve 2, the rubber sealing ring 4 is fixed in a groove on the valve 2 through the pressing ring 3 and a screw located below, the rubber sealing ring adjusts the compression amount by the pressing ring 3, zero leakage can be guaranteed, and finally the fixed sealing seat 5 and the rubber sealing ring 4 can be tightly matched to form a waterproof sealing structure, so as to prevent the medium from leaking from a gap between the valve seat and the valve body, preferably, the fixed sealing seat 5 is made of stainless steel, the sealing ring material of the rubber sealing ring 4 is NBR, EPDM and the like, which can be selected according to the use conditions.

As shown in fig. 3, the movable differential pressure type metal hard sealing structure as the prior art comprises a valve sealing ring 6 fixed on a valve 2 through a screw, a moving ring 7 moving linearly and a support ring 8 on a valve body 1, wherein the valve body is provided with a water inlet and a water outlet connected to a water system, the interfaces of the water inlet and the water outlet are respectively a drawing cavity and a throwing cavity, the moving ring 7 is movably arranged between a right valve body and the support ring 8, the valve sealing ring 6 matched with the conical surface of the moving ring 7, the support ring 8 and the right valve body form a space for placing the moving ring 7, the water inlets and the water outlets respectively arranged on the support ring 8 and the right valve body are communicated with the space for placing the moving ring 7, a high-pressure water conduit on the valve body 1 leads pressure water of the water system or pressure oil of the oil system to two ends of the moving ring 7, and by controlling the water inlet direction, so that the moving ring 7 of the movable differential pressure type metal hard sealing structure moves linearly in the valve body. When water/oil enters the input cavity at the right end, the pressure water/oil pushes the movable ring 7 to move towards the center of the valve to contact with the valve sealing ring 6 on the ball valve and cling to the valve sealing ring to form a sealing surface, at the moment, the extraction cavity at the left end is used as a drainage/oil port to discharge the discharged water/oil, otherwise, when the water/oil enters the extraction cavity at the left end, the pressure water/oil pushes the movable ring 7 to move towards the direction opposite to the center of the valve and separate from the valve sealing ring 6 on the ball valve to leave a gap with a corresponding size, the crank arm 9 is ensured to drive the valve 2 to rotate in the valve body 1, and at the moment, the input cavity at the right end is used as a drainage/oil port to discharge the discharged water/oil. It is worth noting, the utility model discloses a portable differential pressure formula metal seal structure firmly is as overhauing seal structure, and it only drops into work when overhauing, and the event need not every ball valve hydraulic control equipment who is equipped with the shift ring alone under general normal operating conditions.

As shown in the side view from C-C in fig. 4-5, in order to make the valve position of the eccentric full-bore ball valve with asymmetric sealing structure accurate, the present invention further sets a manual locking device at one end of the crank arm 9, specifically, the manual locking device includes a hand wheel 11, a lead screw 13 connected with the hand wheel, a locking nut 14, a bolt 15, a stopper 17, a positioning rod 18, a positioning rod nut 19, a cover plate 16, and a locking pin 10 disposed in a fixed seat on the crank arm, the locking pin 10 can be pulled out and put into two locking pin sleeves 12 (only one locking pin sleeve 12 is shown in fig. 1) on the valve body 1, the locking pin sleeve 12 above one corresponds to the position where the valve is fully opened, the locking pin sleeve 12 below the other position corresponds to the position where the valve is fully closed and the fixed soft sealing structure is sealed, so as to ensure the sealing effect of the fixed soft sealing structure when the valve is closed, make further closely laminating between fixed seal receptacle 5 and the rubber seal 4, guarantee the personnel's safety when overhauing and changing rubber seal 4 to guarantee the aperture position of valve when opening entirely.

Furthermore, the end of the screw 13 is a truncated cone structure, the tail of the locking pin 10 is provided with a groove with threads, the stopper is connected with the inner threads of the groove at the tail of the locking pin 12 through external threads, the stopper 17 is used for clamping the truncated cone structure at the tail of the screw 13 to do linear motion, so as to limit the protruding truncated cone structure at the tail of the screw 13 in the groove at the tail of the locking pin 10, and a certain small gap is left, so that the truncated cone structure of the screw 13 can freely rotate in the groove at the tail of the locking pin 10, so that the screw 13 drives the truncated cone structure at the tail of the screw to move back and forth through the rotation of a hand wheel, and finally the locking pin 12 is pushed to move in the horizontal linear direction, in addition, the cover plate 16 is fixedly installed on a hollow fixed seat on the crank arm through a bolt 15, and the center of the cover plate 16 is provided with a threaded hole which is matched, therefore, when the locking pin 10 is put into or pulled out of place, the locking nut 14 and the cover plate 16 are screwed together to lock the position of the locking pin 10. In a word, the manual spindle locking device on the crank arm 9 pushes the locking pin 10 to move back and forth through the rotating hand wheel 11 and the screw rod 13, the screw rod 13 drives the locking pin 10 back and forth through the clamping of the stop block 17 on the tail end of the screw rod and the relative rotation of the screw rod and the cover plate 16, and finally the locking pin 10 can be accurately and stably pulled out and put into the upper locking pin sleeve 12 and the lower locking pin sleeve 12 corresponding to the full-opening and full-closing positions of the valve.

In addition, as shown in fig. 4, the top end of the upper side of the locking pin 10 is provided with a limiting groove matched with a positioning rod 18 fixed on the fixing seat, the positioning rod 18 is fixed on the fixing seat through a positioning rod nut 19, the limiting groove formed in the upper side of the locking pin 10 limits the positioning rod to move back and forth in the horizontal direction only, so that the locking pin 10 cannot rotate in the axial direction, two ends of the limiting groove can be clamped with the positioning rod 18 on the fixing seat, so that the locking pin sleeve 12 can be further guaranteed to be accurately moved in and out of the locking pin 10, and a worker can feed back to know whether the hand wheel rotates to the limit position. Furthermore, a conical seal can be preferably used between the locking pin 10 and the locking pin sleeve 12, which ensures the accuracy of the locking position.

When a manual device, an electric device or a transmission device in the ball valve has problems and needs to be disassembled for maintenance, the valve is in a fully-opened or fully-closed state by arranging a fully-opened or fully-closed manual mechanical locking device, and the valve can be safely and conveniently maintained under the condition that water exists in a pipeline. The locking pin is operated by the hand wheel to be pulled out, so that the operation is convenient and labor-saving. The taper pin connection ensures that the locking position is accurate.

It is worth mentioning that, the utility model discloses an asymmetric seal structure's eccentric full latus rectum ball valve so do not use bilateral symmetry's low-cost fixed soft seal structure because all use under the condition of fixed soft seal structure at valve inlet outlet both ends, fixed soft seal structure is used simultaneously to both sides, and two soft seal structure will seal simultaneously or overhaul simultaneously, can't satisfy the requirement of a work, an maintenance.

Compared with the prior art, the beneficial effects of the utility model include:

3. Lead screw in the manual lock spindle device on the turning arm passes through the block of dog and with lap between relative rotation promote the stop pin around coming, the stop pin adopts conical surface cooperation with the locking pin cover, cooperation lock nut and locating lever, thereby make the stop pin can be in the upper and lower two stop pin covers of the full on-off position of corresponding valve accurate stable extraction and input, ensure that the valve is full on and the full off position is accurate, and also can make staff's feedback learn through the cooperation that sets up conical surface structure and the spacing groove of stop pin side and put into place whether the stop pin drops into.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. The utility model provides an asymmetric seal structure's eccentric full latus rectum ball valve, its characterized in that, includes valve body, valve, the hard seal structure of portable differential pressure formula metal, fixed soft seal structure, the outer crank arm of valve body and manual locking spindle device, the hard seal structure of portable differential pressure formula metal sets up the inlet end department at the ball valve, fixed soft seal structure sets up the outlet end department at the ball valve, and valve shaft central line and the parallel certain distance of squinting of valve body central line, the crank arm passes through the valve shaft and links to each other with the valve in the valve body to it is rotatory to drive the valve, and when the valve was in full-open or totally-closed state, the manual locking spindle device that sets up on the crank arm can be extracted and drop into respectively in two department's.

2. The eccentric full bore ball valve with asymmetric sealing structure according to claim 1, wherein the movable differential pressure type metal hard sealing structure comprises a valve sealing ring fixed on the valve by a screw, a moving ring moving linearly and a supporting ring fixed on the valve body, the valve body is respectively provided with a water inlet and a water outlet connected to the water system, the moving ring is movably arranged between the valve body and the supporting ring, the valve sealing ring matched with the conical surface of the moving ring, the supporting ring and the valve body form a space for placing the moving ring, and the water inlet and the water outlet respectively arranged on the supporting ring and the valve body are communicated with the space for placing the moving ring.

3. The eccentric full-bore ball valve with the asymmetric sealing structure according to claim 1, wherein the fixed soft sealing structure comprises a fixed sealing seat fixed on the valve body and a rubber sealing ring fixed on the valve body, and the fixed sealing seat and the rubber sealing ring can be tightly matched to form a pair of working sealing pairs.

4. The eccentric full-bore ball valve with the asymmetric sealing structure according to claim 3, wherein the fixed soft sealing structure further comprises a pressing ring, the rubber sealing ring is fixed in a groove on the valve through the pressing ring and a screw which are positioned below the rubber sealing ring, and the compression amount of the rubber sealing ring can be adjusted through the pressing ring to ensure zero leakage.

5. An eccentric full-bore ball valve with an asymmetric sealing structure as claimed in claim 1, wherein the center line of the valve shaft and the center line of the valve body are offset in parallel in the vertical direction by a certain distance to form an eccentricity in the vertical direction.

6. An eccentric full-bore ball valve with an asymmetric sealing structure according to claim 5, wherein the length of the eccentricity is 1-10 mm.

7. The eccentric full-bore ball valve with the asymmetric sealing structure according to claim 3, wherein the fixed sealing seat is made of stainless steel, and the rubber sealing ring is made of NBR or EPDM.

8. The eccentric full-bore ball valve with the asymmetric sealing structure according to claim 1, wherein the manual spindle locking device comprises a hand wheel, a screw rod connected with the hand wheel, a locking nut, a bolt, a stop block, a cover plate and a locking pin arranged in a fixed seat on the crank arm, the cover plate is fixed at one end of the fixed seat through the bolt, the cover plate is provided with a threaded hole, the threaded hole and the screw rod are matched to form a screw rod nut structure, when the valve is in a fully opened or fully closed state, the locking pin can be pulled out of and put into two locking pin sleeves arranged on the valve body, and the locking pin sleeves are matched through a conical surface structure.

9. The eccentric full-bore ball valve with the asymmetric sealing structure according to claim 8, wherein the manual spindle locking device further comprises a stopper, the stopper is in threaded fixed connection with an internal thread of a groove formed in the tail portion of the locking pin through an external thread, the end of the screw rod is in a truncated cone-shaped structure, the stopper is used for limiting the truncated cone-shaped structure to move linearly, and the truncated cone-shaped structure can rotate freely in the groove in the tail portion of the locking pin.

10. The eccentric full-bore ball valve with the asymmetric sealing structure according to claim 8, wherein the manual locking device further comprises a positioning rod and a positioning rod nut, the positioning rod is fixed on the fixing seat through the positioning rod nut, a limiting groove matched with one end of the positioning rod is arranged on the side surface of the locking pin, and the limiting groove limits the positioning rod to move only in the horizontal direction.