CN211599602U

CN211599602U - Hard sealing ball valve

Info

Publication number: CN211599602U
Application number: CN201922485626.7U
Authority: CN
Inventors: 黄存信; 余珠超
Original assignee: Zhejiang Anchor Control Valve Technologies Co ltd
Current assignee: Zhejiang Anchor Control Valve Technologies Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-29
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a technical field of valve discloses a hard seal ball valve, and it includes the valve body, fixes two disk seats in the valve body inner chamber, the valve ball of butt between two disk seats and the valve rod that one end stretched into the valve ball, the middle part of valve ball is equipped with the through-hole that supplies the medium flow, the valve rod can drive the relative valve body rotation of valve ball, the surface of valve ball is equipped with the fixed slot, the fixed slot is located one side that the disk seat is close to and/or keeps away from the valve rod, when the valve ball rotates, the lateral wall of fixed slot does not contact with disk seat or valve body. The utility model has the effect of saving the raw material of the hard alloy layer.

Description

Hard sealing ball valve

Technical Field

The utility model belongs to the technical field of the technique of valve and specifically relates to a hard seal ball valve is related to.

Background

The ball valve is a valve whose opening and closing piece is driven by valve rod and can make rotary motion around the axis of ball valve, and can be used for regulating and controlling fluid.

In the prior art, as shown in fig. 1, a ball valve includes a valve body 1, two valve seats 2 fixed in an inner cavity of the valve body 1, a valve ball 3 abutting between the two valve seats 2, and a valve rod 4 having one end extending into the valve ball 3, wherein a through hole 31 for medium to flow is provided in the middle of the valve ball 3, and the valve rod 4 can drive the valve ball 3 to rotate relative to the valve body 1. Since the valve ball 3 will rub against the valve seat 2 or the valve body 1 when rotating relative to the valve body 1 to cause abrasion, a hard alloy layer is sprayed on the surface of the valve ball 3 to enhance the surface hardness of the valve ball 3.

The above prior art solutions have the following drawbacks: the surface of the valve ball is smooth and consistent, and workers cannot distinguish the part of the valve ball which is not in contact with the valve seat to be worn by naked eyes, so that the hard alloy layer is usually sprayed in an undifferentiated whole surface mode, and the indiscriminate whole surface spraying mode can cause waste of raw materials of the hard alloy layer and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a not enough to prior art exists, the utility model aims at providing a hard seal ball valve, it has the effect of saving stereoplasm alloy layer raw materials.

The above object of the present invention can be achieved by the following technical solutions: the utility model provides a hard seal ball valve, includes the valve body, fixes two disk seats in the valve body inner chamber, valve ball and the valve rod that one end of butt between two disk seats stretched into the valve ball, the middle part of valve ball is equipped with the through-hole that supplies the medium flow, the valve rod can drive the relative valve body rotation of valve ball, the surface of valve ball is equipped with the fixed slot, the fixed slot is located one side that the disk seat is close to and/or keeps away from the valve rod, when the valve ball rotates, the lateral wall of fixed slot does not contact with valve ball or valve body.

Through adopting above-mentioned technical scheme, when the surface spraying carbide raw materials to the valve ball, because the diapire of fixed slot is recessed for the surface of valve ball, the workman makes things convenient for the naked eye to observe the spraying position on valve ball surface when the spraying, and the valve ball surface is compared in the convex position of fixed slot diapire promptly, and this position can contact with valve body or disk seat when the valve ball rotates, and its surface hardness can be strengthened to the carbide layer. The bottom wall of the fixing groove is not contacted with the valve ball or the valve body when the valve ball rotates, so that abrasion is avoided, and the hard alloy layer is not sprayed on the bottom wall of the fixing groove. In addition, since the surface of the coated hard alloy layer is rough, the part sprayed with the hard alloy layer is usually required to be ground so as not to influence the rotation of the valve ball, and the coverage area of the hard alloy layer on the surface of the valve ball provided with the fixing groove is relatively small, so that the grinding time is shortened, and the processing efficiency is high.

The utility model discloses further set up to: the valve rod comprises a fixing part, a supporting part and an inserting part which are integrally formed and sequentially arranged, wherein the supporting part is positioned between the limiting platform and the valve ball, and the diameter of the supporting part is larger than the inner diameter of the limiting platform.

Through adopting above-mentioned technical scheme, when the valve ball rotated certain angle (if the line of the axis of through-hole and valve body inner chamber axis in the valve ball was 45 degrees), the medium of transmission can flow to between valve ball and the valve body from the clearance of valve ball and disk seat in the valve body to produce ascending impact force to the valve rod, the supporting part shifts up thereupon and contacts with spacing platform, plays sealed effect. The fixing part, the supporting part and the inserting part are integrally formed, so that the connecting strength is high, and the processing is convenient.

The utility model discloses further set up to: the fixed part is sleeved with a thrust washer which is abutted to one side of the limiting table close to the valve ball, and the outer diameter of the thrust washer is equal to the diameter of the supporting part.

Through adopting above-mentioned technical scheme, the thrust washer separates to keep off between supporting part and spacing platform for the supporting part can not strike spacing platform under the impact of medium, has reduced the friction loss of supporting part. When the thrust washer is damaged, the thrust washer only needs to be taken out of the valve body and replaced, and compared with a valve rod replacing mode, the replacement cost is low, and the replacement is convenient. The outer diameter of the thrust washer is equal to that of the supporting part, the contact area of the thrust washer and the supporting part is large, and the stability of the thrust washer is good.

The utility model discloses further set up to: the number of the thrust washers is two and is vertically distributed.

Through adopting above-mentioned technical scheme, the thrust gasket of upside supports when tight spacing platform under the medium impact, and the valve rod can drive the thrust gasket rotation of downside, has reduced the dead probability of valve rod and valve ball card, has ensured the normal use of ball valve.

The utility model discloses further set up to: the middle part of the thrust washer is provided with a through hole for the fixing part to penetrate through, and two openings of the through hole are provided with flaring holes extending outwards.

Through adopting above-mentioned technical scheme, when connecting the thrust gasket, penetrate the through hole with the fixed part, the flaring plays the effect of direction when the fixed part stretches into the thrust gasket, is favorable to the installation of thrust gasket.

The utility model discloses further set up to: and a packing sealing layer is arranged between the inner wall of the abdicating hole and the fixing part, and the packing sealing layer is positioned on one side of the limiting table far away from the valve ball.

By adopting the technical scheme, when the thrust washer is worn after long-term use, the medium can seep outwards from the gap between the thrust washer and the limiting table, the packing sealing layer plays a role in further sealing, and the sealing performance of the ball valve is improved.

The utility model discloses further set up to: the valve body comprises two shells connected through a plurality of groups of fasteners, and two valve seats are respectively fixed in the two shells.

Through adopting above-mentioned technical scheme, during the installation ball valve, install two disk seats respectively earlier and fix in two casings, again with the valve ball embedding in one of them casing and with the disk seat butt in this casing, make the edge of two casings align and utilize the fastener to connect convenient assembling after that.

The utility model discloses further set up to: the fastener comprises a fastening bolt and a fastening nut which are in threaded fit, and the fastening bolt penetrates through the two shells simultaneously.

Through adopting above-mentioned technical scheme, two casings pass through fastening bolt and fastening nut and link to each other, easy dismounting and joint strength are high.

The utility model discloses further set up to: and the upper end of one of the shells is fixedly provided with a mounting block, and the mounting block is provided with a plurality of waist-shaped mounting holes.

Through adopting above-mentioned technical scheme, the installation piece can supply people to install the valve body on other fixed parts, and the mounting hole is waist shape and has the effect that makes things convenient for people to finely tune valve body mounted position.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the surface of the valve ball is provided with a fixed groove which is not contacted with the valve seat or the valve body when the valve ball rotates, so that workers can conveniently distinguish the spraying position when the hard alloy layer is sprayed, compared with a whole spraying mode, the raw material of the hard alloy layer is saved, the time consumption of subsequent grinding is short, and the efficiency is high;

2. the thrust washer and the packing sealing layer improve the sealing performance of the ball valve and play a role in preventing media in the valve body from leaking outwards.

Drawings

FIG. 1 is a schematic partial cross-sectional view of a prior art ball valve;

FIG. 2 is a schematic partial cross-sectional view of the present embodiment;

FIG. 3 is a schematic partial cross-sectional view of the valve stem shown separated from the valve body in this embodiment;

FIG. 4 is a schematic cross-sectional view of a thrust washer according to this embodiment.

Reference numerals: 1. a valve body; 11. mounting blocks; 12. mounting holes; 13. a hole of abdication; 131. a limiting table; 2. a valve seat; 3. a valve ball; 31. a through hole; 32. fixing grooves; 33. a slot; 4. a valve stem; 41. a fixed part; 42. a support portion; 43. a plug-in part; 5. a fastener; 51. fastening a bolt; 52. fastening a nut; 6. a thrust washer; 61. a through hole; 62. flaring; 7. and (5) filling a sealing layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a hard seal ball valve, as shown in fig. 2 and 3, including valve body 1, two disk seats 2 fixed in the inner chamber of valve body 1, valve ball 3 and one end of butt between two disk seats 2 stretch into valve rod 4 of valve ball 3, and valve rod 4 can drive valve ball 3 and rotate relative to valve body 1, and the middle part of valve ball 3 is equipped with the through-hole 31 that extends along the horizontal direction, and the medium can realize the transmission through-hole 31.

As shown in fig. 2 and 3, the surface of the valve ball 3 is provided with two fixing grooves 32, one fixing groove 32 is located on one side of the valve seat 2 close to the valve rod 4, the other fixing groove 32 is located on one side of the valve seat 2 far away from the valve rod 4, and a hard alloy layer is sprayed on other parts of the surface of the valve ball 3. When the valve ball 3 rotates, the convex part of the surface of the valve ball 3 compared with the fixed groove 32 can be in contact friction with the valve seat 2 or the valve body 1, the hard alloy layer increases the surface hardness of the part, and the service life of the valve ball 3 is prolonged. When the hard alloy layer is sprayed, the bottom wall of the fixing groove 32 is sunken relative to the surface of the valve ball 3, so that the indicating function is achieved, the whole surface of the valve ball 3 is not required to be sprayed when workers spray the hard alloy layer, the material consumption of the hard alloy layer is reduced, and resources are saved.

As shown in fig. 2 and 3, the valve body 1 includes two housings oppositely disposed and connected by a plurality of sets of fasteners 5, and two valve seats 2 are respectively fixed in the two housings. The upper end of one of them casing is fixed with installation piece 11, is equipped with a plurality of waist shape mounting hole 12 on the installation piece 11, and installation piece 11 can be used for linking to each other casing and other 41 fixed parts, and the position of casing is finely tuned when mounting hole 12 can supply people to install the casing to with installation environment adaptation.

As shown in fig. 2 and 3, each set of fastening members 5 includes a fastening bolt 51 and a fastening nut 52 which are in threaded fit, the fastening bolt 51 is simultaneously inserted into the two housings and is in threaded connection with the fastening nut 52, and the assembly and disassembly are convenient and the connection strength is high.

As shown in fig. 2 and 3, a relief hole 13 is provided in a side wall of the housing to which the mounting block 11 is fixed, and an annular stopper 131 is provided on an inner wall of the relief hole 13. The valve rod 4 comprises a fixing portion 41, a supporting portion 42 and an inserting portion 43 which are integrally formed, wherein the supporting portion 42 is located between the fixing portion 41 and the inserting portion 43, the upper end of the side wall of the valve ball 3 is provided with a slot 33, the bottom end of the inserting portion 43 is inserted into the slot 33, and two opposite side walls of the inserting portion 43 are respectively abutted to two opposite inner walls of the slot 33. When the valve rod 4 rotates, the part of the insertion part 43 extending into the slot 33 drives the valve ball 3 to rotate, so that the opening and closing of the ball valve are realized.

As shown in fig. 2 and 3, two thrust washers 6 are sleeved on the outer side of the fixing portion 41, the two thrust washers 6 are vertically distributed, the outer diameter of the two thrust washers 6 is equal to the diameter of the supporting portion 42 and is larger than the inner diameter of the limiting table 131, and the thrust washers 6 are located between the limiting table 131 and the valve ball 3. The upper thrust washer 6 abuts against the lower end surface of the stopper 131, and the lower thrust washer 6 abuts against the upper end surface of the support portion 42. When the valve ball 3 rotates to a certain angle and has a gap with the valve seat 2, a medium can flow between the valve ball 3 and the valve body 1 from the gap, so that impact force towards the limiting table 131 is generated on the valve rod 4, the thrust gasket 6 can prevent the medium from seeping from the gap between the valve rod 4 and the limiting table 131 to play a role in sealing, and can also avoid the direct collision between the supporting part 42 and the limiting table 131 to play a role in preventing abrasion.

As shown in fig. 3 and 4, a through hole 61 is formed in the middle of the thrust washer 6, the inner diameter of the through hole 61 is slightly larger than the diameter of the fixing portion 41, a flared opening 62 is formed at each of two openings of the through hole 61, the flared opening 62 is formed by extending the inner wall of the through hole 61 outwards, and the inner diameter of the flared opening gradually increases towards the side away from the through hole 61. When the thrust washer 6 is installed, the fixing portion 41 extends into the through hole 61, and the flared end 62 plays a role in guiding when the fixing portion 41 moves, so that the installation of the thrust washer 6 is facilitated.

As shown in fig. 2 and 3, a plurality of layers of packing sealing layers 7 are arranged between the inner diameter of the relief hole 13 and the fixing portion 41, and the packing sealing layers 7 are positioned on one side of the limiting table 131 far away from the valve ball 3. When the thrust gasket 6 is worn, the filler sealing layer 7 can block the medium flowing between the inner wall of the abdicating hole 13 and the fixing part 41 from seeping out, and further sealing is achieved.

The implementation principle of the embodiment is as follows: the surface of the valve ball 3 is provided with a fixing groove 32 which is not contacted with the valve seat 2 or the valve body 1 when the valve ball rotates, so that a worker can conveniently distinguish a spraying position when spraying the hard alloy layer, compared with a whole spraying mode, the raw material of the hard alloy layer is saved, and the time consumption for subsequently grinding the hard alloy layer is short and the efficiency is high. The thrust washer 6 and the packing sealing layer 7 improve the sealing performance of the ball valve and play a role in preventing the medium in the valve body 1 from leaking outwards.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a hard seal ball valve, includes valve body (1), fixes two disk seats (2) in valve body (1) inner chamber, valve ball (3) and one end of butt between two disk seats (2) stretch into valve rod (4) of valve ball (3), the middle part of valve ball (3) is equipped with through-hole (31) that supply the medium flow, valve rod (4) can drive valve ball (3) and rotate its characterized in that for valve body (1) relatively: the surface of the valve ball (3) is provided with a fixing groove (32), the fixing groove (32) is positioned on one side, close to and/or far away from the valve rod (4), of the valve seat (2), and when the valve ball (3) rotates, the side wall of the fixing groove (32) is not in contact with the valve seat (2) or the valve body (1).

2. A hard seal ball valve as defined in claim 1, wherein: be equipped with hole (13) of stepping down on the lateral wall of valve body (1), be equipped with annular spacing platform (131) on the inner wall of hole (13) of stepping down, valve rod (4) are including integrated into one piece and fixed part (41), supporting part (42) and grafting portion (43) that set gradually, supporting part (42) are located between spacing platform (131) and valve ball (3) and the diameter is greater than the internal diameter of spacing platform (131).

3. A hard seal ball valve as defined in claim 2 wherein: the fixed part (41) is sleeved with a thrust washer (6) which is abutted to one side of the limiting table (131) close to the valve ball (3), and the outer diameter of the thrust washer (6) is equal to the diameter of the supporting part (42).

4. A hard seal ball valve as defined in claim 3 wherein: the number of the thrust washers (6) is two and the thrust washers are vertically distributed.

5. A hard seal ball valve as defined in claim 4 wherein: the middle part of the thrust washer (6) is provided with a through hole (61) for the fixing part (41) to penetrate, and two openings of the through hole (61) are provided with flaring holes (62) extending outwards.

6. A hard seal ball valve as defined in claim 2 wherein: and a packing sealing layer (7) is arranged between the inner wall of the abdicating hole (13) and the fixing part (41), and the packing sealing layer (7) is positioned on one side of the limiting table (131) far away from the valve ball (3).

7. A hard seal ball valve as defined in claim 1, wherein: the valve body (1) comprises two shells connected through a plurality of groups of fasteners (5), and the two valve seats (2) are respectively fixed in the two shells.

8. A hard seal ball valve as defined in claim 7 wherein: the fastening piece (5) comprises a fastening bolt (51) and a fastening nut (52) which are in threaded fit, and the fastening bolt (51) penetrates through the two shells simultaneously.

9. A hard seal ball valve as defined in claim 7 wherein: an installation block (11) is fixed at the upper end of one of the shells, and a plurality of waist-shaped installation holes (12) are formed in the installation block (11).