CN211574312U

CN211574312U - Ball valve

Info

Publication number: CN211574312U
Application number: CN201922455026.6U
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: 2020-09-25
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a technical field of valve discloses a 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 cover is equipped with the thrust gasket that is located between valve ball and the valve body on the valve rod, the thrust gasket has the stereoplasm alloy layer for sheetmetal and surface coating. The utility model discloses have sealing performance good, job stabilization's effect.

Description

Ball valve

Technical Field

The utility model belongs to the technical field of the technique of valve and specifically relates to a 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, a through hole 31 for medium to flow is provided in the middle of the valve ball 3, the valve rod 4 can drive the valve ball 3 to rotate relative to the valve body 1, a thrust washer 5 made of polytetrafluoroethylene material is sleeved on the valve rod 4, and the thrust washer 5 is located between the valve ball 3 and the valve body 1. When the valve ball 3 rotates to a certain angle, a gap exists between the valve ball 3 and the valve seat 2, and a medium can flow into the gap between the valve body 1 and the valve ball 3 from the gap, so that an upward impact force is generated on the valve rod 4, the thrust gasket 5 can avoid direct friction collision between the valve rod 4 and the valve body 1, an anti-friction effect is achieved, the medium can be prevented from flowing out from the gap between the valve rod 4 and the valve body 1, and a sealing effect is achieved.

The above prior art solutions have the following drawbacks: the thrust washer in the ball valve is made of polytetrafluoroethylene materials, the temperature resistance and pressure resistance of the thrust washer are poor, the thrust washer is easily dissolved and softened after a medium is contacted with the thrust washer in a high-temperature and high-pressure state, and the position of a valve rod is deviated, so that the sealing performance of the ball valve is reduced, the normal work of the ball valve is influenced, and the improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ball valve, it has the effect that sealing performance is good, job stabilization to the not enough of prior art existence.

The above object of the present invention can be achieved by the following technical solutions: the utility model provides a ball valve, includes the valve body, fixes two disk seats in the valve body inner chamber, butt valve ball and the valve rod that one end stretched into the valve ball between two disk seats, 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 cover is equipped with the thrust gasket that is located between valve ball and the valve body on the valve rod, the thrust gasket is sheetmetal and surface spraying has the carbide layer.

By adopting the technical scheme, when the valve rod drives the valve ball to rotate to form a gap with the valve seat, the medium transmitted in the valve body flows to the gap between the valve body and the valve ball from the gap, and the medium flowing to the gap between the valve body and the valve ball is contacted with the thrust gasket and generates impact force on the thrust gasket. The thrust washer is made of metal materials, the high-temperature resistance and the wear resistance of the thrust washer are better than those of polytetrafluoroethylene, the thrust washer is not easy to dissolve and soften when contacting with a high-temperature high-pressure medium on the one hand, and particles in the medium enter a gap between a valve ball and a valve body on the other hand, and the particles cannot abrade the thrust washer in the process of opening and closing the ball valve, so that the valve rod cannot generate position deviation due to loss of the thrust washer, the whole sealing performance of the ball valve is good, and the stable work of the ball valve is guaranteed. The hard alloy layer further improves the wear resistance of the surface of the thrust washer, so that the thrust washer is not easily worn by particles in a medium, and the service life of the thrust washer and the service life of the ball valve are prolonged.

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

Through adopting above-mentioned technical scheme, thrust washer establishes to a plurality of ability that have not only improved its anti medium impact, has further improved the leakproofness of ball valve. And the thrust gasket that is located the downside contacts with the valve rod, the thrust gasket that is located the upside contacts with the valve body, when the thrust gasket at upside supports tight valve body and can't rotate, the valve rod still can drive the thrust gasket rotation of the relative upside of thrust gasket of downside, and then makes the relative valve body rotation of valve ball, plays anti-lock effect.

The utility model discloses further set up to: and fillets are arranged at the joints of the two opposite end surfaces of the thrust washer and the circumferential side wall of the thrust washer.

Through adopting above-mentioned technical scheme, the fillet makes thrust washer's surface more smooth, and operating personnel is difficult by thrust washer's edges and corners scratch during the installation, plays the effect of protection staff.

The utility model discloses further set up to: the valve body is characterized in that a yielding hole for the valve rod to penetrate is formed in the side wall of the valve body, an annular limiting table is formed on the inner wall of the yielding hole and integrally formed with the valve body, and a gap exists between the thrust gasket located on the upper side and the lower side of the limiting table and the inner wall of the yielding hole.

By adopting the technical scheme, the thrust washer is abutted against the lower side of the limiting table, so that the medium can be prevented from flowing out of a gap between the valve rod and the valve body, and the sealing and seepage-proofing effects are achieved; spacing platform and valve body integrated into one piece, processing is convenient and stability is high, compressive capacity is good. The thrust washer has a clearance with the inner wall of the abdicating hole, and the thrust washer can not be in contact with the valve body to generate abrasion when the valve rod rotates, so that the service life of the thrust washer is prolonged.

The utility model discloses further set up to: the valve rod comprises a fixing portion, a supporting portion and an inserting portion, the fixing portion, the supporting portion and the inserting portion are sequentially arranged, one end of the inserting portion is inserted into the valve ball, the thrust gasket is sleeved on the outer side of the fixing portion and the lower side of the thrust gasket abuts against the upper portion of the supporting portion, and the diameter of the supporting portion is equal to the outer diameter of the thrust gasket.

Through adopting above-mentioned technical scheme, the supporting part has increased the area of contact of valve rod and thrust washer for thrust washer atress everywhere is relatively impartial, has improved thrust washer's stability.

The utility model discloses further set up to: one end of the valve ball, which is close to the valve rod, is provided with a slot for the insertion part to extend into, and the bottom surface of the slot is a concave cambered surface.

Through adopting above-mentioned technical scheme, during the equipment ball valve, the concave arc surface plays the effect of direction at the in-process that grafting portion stretched into the slot, is favorable to grafting portion to stretch into the bottom to the slot.

The utility model discloses further set up to: a gap exists between the bottom end of the inserting part and the concave cambered surface.

Through adopting above-mentioned technical scheme, the valve rod can not support the valve ball tightly on the disk seat, has reduced the friction loss that produces with the disk seat when the valve ball rotates, helps the valve rod to drive the valve ball and rotates.

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

Through adopting above-mentioned technical scheme, if the thrust gasket produces the loss, then the medium can be followed the outside seepage flow in clearance of spacing platform and valve rod, and the packing sealing layer plays further sealed effect, avoids the medium seepage.

The utility model discloses further set up to: the filler sealing layer is a PTFE layer.

By adopting the technical scheme, the PTFE has softer mechanical property, has the advantages of high temperature resistance, low temperature resistance, corrosion resistance, high lubrication, non-adhesiveness and no toxicity, and the filler sealing layer is made of the material, so that the processing is convenient and the service life is long.

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

1. the thrust washer is a metal sheet, the surface of the thrust washer is coated with the hard alloy layer, the thrust washer has good high-temperature resistance and wear resistance, and cannot be dissolved and softened or abraded by particles in a medium in a high-temperature and high-pressure environment, so that the position of a valve rod is prevented from deviating, the sealing property and the working stability of the ball valve are improved, and the service life of the ball valve is long;

2. the two thrust washers not only increase the pressure resistance, but also have the anti-lock effect, and are beneficial to the valve rod to drive the valve body to rotate; the concave cambered surface plays a role in guiding when the insertion part of the valve rod extends into the slot.

Drawings

FIG. 1 is a schematic structural diagram of a ball valve in the prior art;

FIG. 2 is a schematic structural diagram of the present embodiment;

FIG. 3 is a schematic view of a partial explosion of the present embodiment;

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

Reference numerals: 1. a valve body; 11. a hole of abdication; 12. a limiting table; 2. a valve seat; 3. a valve ball; 31. a through hole; 32. a slot; 321. a concave arc surface; 4. a valve stem; 41. a fixed part; 42. a support portion; 43. a plug-in part; 5. a thrust washer; 51. a hard alloy layer; 52. round corners; 6. 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 ball valve, as shown in fig. 2, 3, include valve body 1, fix two disk seats 2 in the 1 inner chamber of valve body, valve ball 3 and one end of butt between two disk seats 2 stretch into valve rod 4 of valve ball 3, and two disk seats 2 are relative setting and are located the left and right sides of valve ball 3 respectively, and the middle part of valve ball 3 is equipped with the through-hole 31 that extends along the horizontal direction, and valve rod 4 can drive the relative valve body 1 rotation of valve ball 3. When the valve ball 3 is rotated to make the through hole 31 communicate with the inner cavity of the valve body 1, the medium can be transmitted through the through hole 31.

As shown in fig. 2 and 3, a yielding hole 11 extending in the vertical direction is formed in the side wall of the valve body 1, an annular limiting table 12 is arranged on the inner wall of the yielding hole 11, and the limiting table 12 and the valve body 1 are integrally formed. 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 diameter of the fixing portion 41 is smaller than the inner diameter of the yielding hole 11, the diameter of the supporting portion 42 is larger than the inner diameter of the yielding hole 11, the fixing portion 41 penetrates through the yielding hole 11, and the supporting portion 42 is located between the valve ball 3 and the valve body 1.

As shown in fig. 2 and 3, the insertion part 43 includes two opposite planes, the insertion groove 32 is provided at one end of the valve ball 3 close to the valve rod 4, and the two opposite planes of the insertion part 43 are respectively abutted against two opposite inner walls of the insertion groove 32. When the valve rod 4 is rotated, the part of the insertion part 43 extending into the slot 32 drives the valve ball 3 to rotate relative to the valve body 1, so that the opening and closing of the ball valve are realized. The bottom surface of the slot 32 is a concave arc surface 321, a gap exists between the bottom end of the insertion part 43 and the concave arc surface 321, and if the valve rod 4 has an inclined offset in the process of extending into the slot 32, the bottom end of the insertion part 43 contacts with the concave arc surface 321 and returns to a vertical state under the guiding action of the concave arc surface 321, so that the insertion of the valve rod 4 is facilitated.

As shown in fig. 3 and 4, two annular thrust washers 5 are sleeved outside the fixing portion 41, the two thrust washers 5 have the same shape and size, and hard alloy layers 51 are sprayed on the surfaces of the two thrust washers 5. Wherein the thrust washer 5 positioned at the upper side is abutted with the lower end face of the limit table 12, the thrust washer 5 positioned at the lower side is abutted with the upper end face of the supporting part 42, and the diameter of the thrust washer 5 is smaller than the inner diameter of the abdicating hole 11 and is equal to the diameter of the supporting part 42.

As shown in fig. 2 and 3, when the valve ball 3 rotates to have a gap with the valve body 1 under the action of the valve rod 4, the medium flows into the gap between the valve ball 3 and the valve body 1 from the gap, so as to generate an upward impact force on the thrust washer 5, and the thrust washer 5 can block the medium from seeping outwards from the gap between the valve rod 4 and the valve body 1, thereby playing a role of sealing. In addition, the thrust washer 5 is made of metal materials, has good temperature and pressure resistance, can not be dissolved and softened in a high-temperature and high-pressure environment to influence the sealing performance of the ball valve, and ensures the stable work of the ball valve.

As shown in fig. 3 and 4, the two opposite end faces of the thrust washer 5 and the connection part of the circumferential side wall are provided with round corners 52, and when an operator assembles the ball valve, the round corners 52 can protect hands from being damaged by the edges of the thrust washer 5.

As shown in fig. 2 and 3, a packing sealing layer 6 is filled between the fixing portion 41 and the inner wall of the relief hole 11, and the packing sealing layer 6 is made of PTFE material and is located on one side of the limiting table 12 away from the valve ball 3. When the thrust washer 5 is worn, the filler sealing layer 6 plays a role in further sealing, the sealing performance of the ball valve is improved, and the ball valve is temperature-resistant, wear-resistant, non-toxic and environment-friendly.

The implementation principle of the embodiment is as follows: the thrust washer 5 is a metal sheet, the surface of which is coated with the hard alloy layer 51, has good high temperature resistance and wear resistance, can not be dissolved and softened or worn by particles in a medium in a high-temperature and high-pressure environment, avoids the position of the valve rod 4 from deviating, improves the sealing property and the working stability of the ball valve, and has long service life. And the number of the thrust washers 5 is two, when the thrust washer 5 on the upper side compresses the limit table 12, the valve rod 4 can still drive the thrust washer 5 on the lower side to rotate, and the anti-locking effect is achieved.

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 ball valve, includes valve body (1), fixes valve ball (3) and valve rod (4) that one end stretches into valve ball (3) between two disk seats (2), butt in valve body (1) inner chamber two disk seats (2), 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 relative valve body (1), the cover is equipped with thrust washer (5) that are located between valve ball (3) and valve body (1) on valve rod (4), its characterized in that: the thrust washer (5) is a metal sheet, and a hard alloy layer (51) is sprayed on the surface of the thrust washer.

2. A ball valve according to claim 1, wherein: the number of the thrust washers (5) is two.

3. A ball valve according to claim 2, wherein: and fillets (52) are arranged at the joints of the two opposite end surfaces of the thrust washer (5) and the circumferential side wall of the thrust washer.

4. A ball valve according to claim 2, wherein: be equipped with on the lateral wall of valve body (1) and supply hole of stepping down (11) that valve rod (4) penetrated, be equipped with on the inner wall of hole of stepping down (11) and just be annular spacing platform (12) with valve body (1) integrated into one piece, be located thrust washer (5) butt of upside and have the clearance at the downside of spacing platform (12) and with the inner wall of hole of stepping down (11).

5. A ball valve according to claim 4, wherein: the valve rod (4) comprises a fixing portion (41), a supporting portion (42) and an inserting portion (43) which are sequentially arranged, one end of the inserting portion (43) is inserted into the valve ball (3), the thrust washer (5) which is arranged on the outer side of the fixing portion (41) and on the lower side of the fixing portion (41) in an abutting mode is arranged above the supporting portion (42) in the sleeved mode, and the diameter of the supporting portion (42) is equal to the outer diameter of the thrust washer (5).

6. A ball valve according to claim 5, wherein: one end of the valve ball (3) close to the valve rod (4) is provided with a slot (32) for the insertion part (43) to extend into, and the bottom surface of the slot (32) is a concave arc surface (321).

7. A ball valve according to claim 6, wherein: a gap exists between the bottom end of the inserting part (43) and the concave cambered surface (321).

8. A ball valve according to claim 5, wherein: and a packing sealing layer (6) is arranged between the fixing part (41) and the inner wall of the abdicating hole (11), and the packing sealing layer (6) is positioned on one side of the limiting table (12) far away from the valve ball (3).

9. A ball valve according to claim 8, wherein: the filler sealing layer (6) is a PTFE layer.