CN214699296U

CN214699296U - Hard-seal wear-resistant floating ball valve capable of being used in high-temperature and high-pressure solid-containing working condition

Info

Publication number: CN214699296U
Application number: CN202022703187.5U
Authority: CN
Inventors: 干瑞彬; 徐兴华; 周晨; 吴小康; 杨雪华; 虞戈; 陈尚书; 朱凌霞
Original assignee: CNNC Sufa Technology Industry Co Ltd
Current assignee: CNNC Sufa Technology Industry Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-11-12
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to an industrial valve field, concretely relates to can be used to high temperature high pressure and contain wear-resisting ball valve that floats of hard seal of solid operating mode. The utility model provides a can be used to high temperature high pressure and contain wear-resisting ball valve that floats of hard seal of solid operating mode which characterized in that includes the valve body, is equipped with the end cover on the left of the valve body, is equipped with the spheroid in the valve body cavity, and the spheroid top is equipped with the valve rod, at spheroid both sides symmetrical arrangement metal valve seat. This novel patent is showing the effect and is: the bidirectional sealing of the floating ball valve is realized through the arrangement of the disc spring load mechanism and the valve seat, the blocking of a ball body and the valve seat of the valve under the high-temperature working condition is solved, the forced sealing structure form of the valve body and the end cover and the special hardening of the surfaces of the ball body and the valve seat parts ensure the sealing performance and the wear resistance of the valve under the high-temperature high-pressure high-solid working condition, the normal opening and closing of the ball valve are ensured to be free of blocking, the ball valve is ensured to realize reliable sealing under the high-temperature high-pressure solid harsh working condition, and the long-period operation of the ball valve is ensured.

Description

Hard-seal wear-resistant floating ball valve capable of being used in high-temperature and high-pressure solid-containing working condition

Technical Field

The utility model relates to an industrial valve field, concretely relates to can be used to high temperature high pressure and contain wear-resisting ball valve that floats of hard seal of solid operating mode.

Background

The ball valve is a valve using a ball body as a closing member, has the main function of cutting off or connecting a fluid channel in a pipeline, and is widely applied to industries such as petrochemical industry, metallurgy, coal chemical industry, thermal power plants and the like. The action principle of the ball valve is that a certain torque is applied to the upper end of a valve rod by a handle or other driving devices and is transmitted to a ball body, so that the ball body rotates by 90 degrees (except for a valve with a special structure), the through hole of the ball body is superposed or vertical to the central line of a channel of a valve body, and the full opening or full closing action of the valve is completed. Compared with a gate valve and a stop valve which move linearly, the ball valve is convenient to open and close, and the valve is convenient to open and close quickly.

The ball body of the floating ball valve is freely supported on the valve seat, and under the action of fluid pressure, the ball body generates displacement in the fluid flowing direction, so that the ball body is attached to the sealing surface of the valve seat behind the valve to realize sealing. Compared with a fixed ball valve, the floating ball valve is simple in structure and suitable for solid particle working conditions, but for a long time, the floating ball valve mainly adopts a one-way soft sealing structure, is influenced by material characteristics and a valve structure, cannot be suitable for high-temperature, high-pressure and abrasion working conditions, and cannot realize two-way sealing. Therefore, the bidirectional hard-sealing floating ball valve which is stable in sealing, reliable in structure, wear-resistant, high-temperature-resistant and high-pressure-resistant, is developed, is suitable for solid-containing working conditions such as coal-to-oil, petroleum mineral deposit collection, polycrystalline silicon manufacturing, electric power systems and the like, is beneficial to prolonging the service life and the period of the valve, reduces the frequency of replacing the valve, and has important significance for promoting the development of energy industry in China.

SUMMERY OF THE UTILITY MODEL

This novel defect to prior art, through carrying out the innovative design to the floating ball valve, realize valve both way seal, can solve the valve and contain wearing and tearing and the valve jamming problem of valve internals when solid harsh operating mode moves at high temperature high pressure, reduce the damage of valve seal position, avoid the medium to leak outward, be favorable to reducing the valve and maintain the frequency, finally reach extension valve life's purpose.

In order to realize the purpose, the novel solar water heater adopts the following technical scheme: the utility model provides a can be used to high temperature high pressure and contain wear-resisting ball valve that floats of hard seal of solid operating mode which characterized in that includes the valve body, is equipped with the end cover on the left of the valve body, is equipped with the spheroid in the valve body cavity, and the spheroid top is equipped with the valve rod, at spheroid both sides symmetrical arrangement metal valve seat.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid working conditions, wherein the valve body and the end cover are provided with convex shoulder sealing surfaces which are attached to the plane sealing surfaces of the valve seat to realize sealing.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid working conditions, wherein the valve body side valve seat adopts the disc spring loading structure to realize the fitting and pre-tightening of a ball body and a valve seat, and the disc spring loading structure has a limiting function and can prevent the disc spring from being crushed and losing efficacy.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid working conditions, wherein the valve body and the end cover realize middle cavity sealing through the isosceles trapezoid sealing gasket with the bevel edge of 23 degrees.

According to the hard-seal wear-resistant floating ball valve capable of being used under the high-temperature and high-pressure solid-containing working condition, STL21 hard alloy is welded on the valve body and the inner wall of the 23-degree chute of the end cover in a surfacing mode, the hardness of the seal ring groove is improved, the compression deformation of the ring groove is reduced, and the service life of the seal is prolonged.

As above, the hard-sealing wear-resistant floating ball valve capable of being used for the high-temperature high-pressure solid working condition is characterized in that the top of the ball body is free of a spherical crown, the top of the ball body is provided with a rectangular groove for connecting a valve rod, hard alloy is welded on the periphery of the ball groove in an overlaying mode, the strength of the ball groove is improved, and the ball groove is prevented from being crushed or cracked due to local stress.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid-containing working conditions, and valve seat structures on two sides of the ball body are consistent and can be used interchangeably.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid-containing working conditions, wherein in order to realize wear resistance of the ball body, the ball body adopts a hardening process of laser cladding NI-WC and vapor deposition TiN, the outer surface of a hardened layer of the ball body has golden yellow gloss, the hardness of the hardened layer is 1600HV-2000HV, the thickness of the hardened layer is more than or equal to 0.5mm, and the bonding strength of the hardened layer and a base material is more than or equal to 480 MPa.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid-containing working conditions, wherein in order to realize wear resistance of the valve seat, the valve seat adopts a hardening process of laser cladding NI-WC and vapor deposition TiN, the outer surface of a hardened layer of the valve seat has golden yellow gloss, the hardness of the hardened layer is 1500HV-1800HV, the thickness of the hardened layer is more than or equal to 0.5mm, and the bonding strength of the hardened layer and a base material is more than or equal to 480 MPa.

The hard-sealing wear-resistant floating ball valve can be used for high-temperature and high-pressure solid-containing working conditions, wherein in order to realize wear resistance of a flow passage area, a hardening process of laser cladding Ni-WC is adopted for flow passages of an end cover and a valve body, the hardness of the flow passage is more than or equal to 750HV, the thickness of a hardened layer is more than or equal to 0.5mm, and the bonding strength of the hardened layer and a base material is more than or equal to 480 MPa.

This novel patent is showing the effect and is: the bidirectional sealing of the floating ball valve is realized through the arrangement of the disc spring load mechanism and the valve seat, the blocking of a ball body and the valve seat of the valve under the high-temperature working condition is solved, the forced sealing structure form of the valve body and the end cover and the special hardening of the surfaces of the ball body and the valve seat parts ensure the sealing performance and the wear resistance of the valve under the high-temperature high-pressure high-solid working condition, the normal opening and closing of the ball valve are ensured to be free of blocking, the ball valve is ensured to realize reliable sealing under the high-temperature high-pressure solid harsh working condition, and the long-period operation of the ball valve is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a hard-sealing wear-resistant floating ball valve under high-temperature and high-pressure solid-containing conditions.

Fig. 2 is a partially enlarged view of the valve seat structure of fig. 1.

Fig. 3 is a schematic diagram of a sphere.

In the figure: 1. the valve comprises a valve body, 2 disc springs, 3 right valve seats, 4 spheres, 5 left valve seats, 6 isosceles trapezoid sealing gaskets, 7 end covers, 8 studs, 9 nuts, 10 fixing plates, 11 screws, 12 driving devices, 13 supports, 14 packing loading mechanisms, 15 pressing sleeves, 16 valve rods, 17 packing, a circular arc sealing surface, b plane sealing surface and the like

Detailed Description

The present application is further described with reference to the following drawings and implementations:

as shown in fig. 1, a hard-sealing wear-resistant floating ball valve for high-temperature and high-pressure solid-containing working conditions mainly comprises a valve body 1, a disc spring 2, a right valve seat 3, a ball body 4, a left valve seat 5, an isosceles trapezoid sealing gasket 6, an end cover 7, a stud 8, a nut 9, a fixing plate 10, a screw 11, a driving device 12, a support 13, a packing load mechanism 14, a pressing sleeve 15, a valve rod 16, a packing 17 and other parts, wherein the isosceles trapezoid sealing gasket 6 is arranged between the valve body 1 and the end cover 7 and is pre-tightened through a fastener stud 8 and the nut 9 to form static sealing of a flange in the valve; the ball body 4 is installed in the cavity of the valve body 1 through lateral translation, a ball groove on the ball body is matched with the valve rod 16, the driving device 12 drives the valve rod 16 to rotate to control the rotation of the ball body 4, a flow guide hole penetrates through the left and right of the inside of the ball body 4, when the flow guide hole and a flow passage of the valve body 1 are on the same plane, the valve is fully opened, and when the flow guide hole is vertical to the flow passage plane of the valve body 1, the valve is closed; the packing 17 is placed in a circumferential gap between the valve rod 16 and the valve body 1, and is fixed and compressed through the pressing sleeve 15 and the packing loading mechanism 14 to form dynamic sealing at the position of the valve rod 16; valve seats are symmetrically distributed on two sides of the sphere 4, wherein the left valve seat 5 is fixed on the end cover 7 through a screw 11 and a fixing plate 10, and the plane of the left valve seat 5 is ensured to be attached to a convex shoulder in the end cover 7; the right valve seat 3 is installed in a cavity of the valve body 1, after the valve body 1 is fixedly connected with the end cover 7, the right valve seat 3 moves to the left side under the action of the disc spring 2 and drives the ball 3 to move synchronously, so that the ball 4 is attached to the arc surface of the left valve seat 5, when the upper plane of the left valve seat 5 is attached to the convex shoulder sealing surface b of the end cover 7, and the arc surface of the left valve seat 5 is attached to the arc surface sealing surface a of the ball 4, the initial sealing of the valve is established;

as shown in figure 2, a gap is reserved between the valve body 1 and the right valve seat 3, the gap is generally controlled to be 0.1-1mm, the specific size of the gap is adjusted according to the service temperature of the valve, and the expansion locking of the ball body 4 and the valve seats on the two sides is mainly prevented. Dish spring 2 is installed in 1 annular of valve body, receives the annular space restriction dish spring 2 and right valve 3 seats to remove and the circumference does not have the removal, and the valve body annular height is greater than dish spring 2 thickness, and after the compression appears in the dish spring atress, the spheroid moved to the right side and promotes right disk seat 3 and valve body 1's laminating sealed.

Referring to fig. 1 and 2, further explaining the sealing manner of the valve seat, when the valve is closed, when the medium in the valve flows from the right side of the disc spring 2 to the left side, the pretightening force direction of the disc spring is consistent with the medium force direction, the right valve seat 3 is separated from the valve body 1, at this time, the left valve seat 5 plays a role in sealing, and the right valve seat 3 does not have a role in sealing; when the medium in the valve flows from the left side to the right side of the disc spring 2 and the pretightening force of the disc spring is larger than the medium force, the left valve seat 5 plays a sealing role and the right valve seat 3 does not play a sealing role; when the medium in the valve flows from the left side to the right side of the disc spring 2 and the medium force overcomes the pretightening force of the disc spring 2, the right valve seat 3 plays a sealing role and the left valve seat 5 does not play a sealing role;

as shown in figure 3, the top of the ball body 4 is not provided with a spherical crown, the rectangular ball groove can ensure that the valve rod is not stressed when the valve is at a closed position, the thickness of a hard alloy which is formed by surfacing welding in the ball groove is more than or equal to 3mm, the strength of the ball groove part is improved, the arc sealing surface a of the ball body and the valve seat is covered with a hardening layer, the hardening layer adopts a composite hardening mode of laser cladding Ni-WC and vapor deposition TiN, the hardness of the hardened ball body is 1600HV-2000HV, the hardness of the valve seat is 1500HV-1800HV, and the hardening layer has the characteristics of high bonding strength, high hardness, good high temperature resistance and the like, and can effectively improve the wear resistance and the sealing performance of the valve under the high-temperature and high-pressure solid-containing working condition.

The foregoing detailed description is intended to be illustrative of the present application and is not intended to be limiting, as any modifications and variations may be made thereto without departing from the scope of the invention.

Claims

1. A hard-sealing wear-resistant floating ball valve for high-temperature and high-pressure solid working conditions is characterized by comprising a valve body, wherein an end cover is arranged at the left side of the valve body, a ball body is arranged in a cavity of the valve body, a valve rod is arranged above the ball body, valve seats are symmetrically arranged at the two sides of the ball body,

the valve body and the end cover are provided with convex shoulder sealing surfaces which are attached to the valve seat plane sealing surface to realize sealing;

the valve seat at the valve body side adopts a disc spring loading structure to realize the joint pre-tightening of the ball body and the valve seat, and the disc spring loading structure has a limiting function and can prevent the disc spring from being crushed and losing efficacy;

the valve body and the end cover realize the sealing of the middle cavity through an isosceles trapezoid sealing gasket with a bevel edge of 23 degrees;

the STL21 hard alloy is welded on the valve body and the inner wall of the 23-degree chute of the end cover, the hardness of the sealing ring groove is improved, the compression deformation of the ring groove is reduced, and the service life of the seal is prolonged.

2. The hard-sealing wear-resistant floating ball valve used for the high-temperature high-pressure solid-containing working condition according to claim 1, wherein the top of the ball body is free of a spherical crown, a rectangular groove is formed in the top of the ball body and used for connecting a valve rod, hard alloy is welded on the periphery of the ball groove in an overlaying mode, the strength of the ball groove is improved, and the ball groove is prevented from being crushed or cracked due to local stress.

3. The hard-sealing abrasion-resistant floating ball valve used in high-temperature and high-pressure solid-containing working conditions as claimed in claim 1, wherein the valve seats on both sides of the ball are consistent in structure and can be used interchangeably.

4. The hard-sealing wear-resistant floating ball valve used in high-temperature and high-pressure solid-containing working conditions as claimed in claim 1, wherein in order to realize wear resistance of the ball body, the ball body adopts a hardening process of laser cladding NI-WC and vapor deposition TiN, the outer surface of a hardened layer of the ball body has golden gloss, the hardness of the hardened layer is 1600HV-2000HV, the thickness of the hardened layer is more than or equal to 0.5mm, and the bonding strength of the hardened layer and a base material is more than or equal to 480 MPa.

5. The hard-sealing wear-resistant floating ball valve used for the high-temperature high-pressure solid-containing working condition as claimed in claim 1, wherein, in order to realize the wear resistance of the valve seat, the hardening process of laser cladding NI-WC and vapor deposition TiN is adopted for the valve seat, the outer surface of the hardened layer of the valve seat has golden gloss, the hardness of the hardened layer is 1500HV-1800HV, the thickness of the hardened layer is more than or equal to 0.5mm, and the bonding strength of the hardened layer and the base material is more than or equal to 480 MPa.

6. The hard-sealing wear-resistant floating ball valve used for the high-temperature high-pressure solid-containing working condition as claimed in claim 1, wherein, in order to realize the wear resistance of the runner area, the runner of the end cover and the valve body adopts the hardening process of laser cladding Ni-WC, the hardness of the runner channel is more than or equal to 750HV, the thickness of the hardened layer is more than or equal to 0.5mm, and the bonding strength of the hardened layer and the base material is more than or equal to 480 MPa.