CN211738087U

CN211738087U - Adjusting ball valve

Info

Publication number: CN211738087U
Application number: CN202020045533.2U
Authority: CN
Inventors: 张欣
Original assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Engineering Group Co Ltd; Sinopec Guangzhou Engineering Co Ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-10-23
Anticipated expiration: 2030-01-10

Abstract

The utility model discloses an adjusting ball valve. The adjusting ball valve is provided with a valve body (1), a valve rod (4), a valve core (9), a valve seat (5), a filler (6), a support (7) and an actuating mechanism. A sealing seat (12) and a sealing sleeve (13) are arranged at the inlet of the valve body, and a metal corrugated pipe or a disk spring (16) is arranged in a sealing cavity between a central cylinder of the sealing seat and the sealing sleeve. The valve seat is positioned between the valve core and the metal corrugated pipe or the disk spring, and metal-to-metal elastic hard seal is formed between the valve core and the valve seat. The adjusting ball valve is provided with steam purging connecting pipes, and one steam purging connecting pipe is connected with one steam purging channel. The outlets of the steam purging channels are respectively positioned at the filling position, between the bottom of the valve core bottom supporting position and the inner cavity surface of the valve body, between the part of the central cylinder of the sealing seat close to the flange of the sealing seat and the sealing sleeve and on the inner cavity surface of the valve body. The utility model discloses mainly used oil refinery heavy oil processingequipment's high temperature oil gas pipeline is last.

Description

Adjusting ball valve

Technical Field

The utility model relates to a valve relates to a can adjust the regulation ball valve of oil gas flow and pressure particularly.

Background

In heavy oil processing equipment such as catalytic cracking, delayed coking and the like in an oil refinery, a reaction system and a fractionation system are generally provided with high-temperature oil gas pipelines, and high-temperature oil gas (petroleum gas) often contains coke powder or heavy oil components easy to coke. Taking a delayed coking device as an example, the high-temperature oil gas at the top of the coke tower is generally 500-550 ℃. When the requirements of oil-gas flow regulation and pressure control are met, a regulating valve needs to be arranged, and the regulating valve is easy to coke and block, so that the normal operation of a process device is influenced. In some delayed coking units, an oil and gas annulus valve is provided in the line from the coke drum reactor to the fractionation tower. The control precision of the oil-gas annular valve is not high, and the oil-gas annular valve is only used for warm tower circulation when two adjacent coke tower reactors are switched, and the oil-gas flow and the control pressure do not need to be accurately adjusted. In newly designed delayed coking units, the coke drum reactor needs to regulate the oil gas flow and control the pressure more precisely, and the oil gas ring valve described above has not been able to meet the requirements.

The existing regulating ball valve is used as a regulating valve, has the characteristics of simple flow channel and better self-cleaning performance, and realizes different regulating characteristics by arranging valve ports with different shapes on a valve core. The regulating ball valve is used on a high-temperature oil-gas pipeline of a heavy oil processing device, the requirements of accurately regulating oil-gas flow and controlling pressure can be met, but the problems of poor sealing, large oil-gas leakage amount, easy coking and the like exist.

Disclosure of Invention

The utility model aims at providing an adjust ball valve to solve the sealed not tight, the big, the easy coking scheduling problem of oil gas leakage quantity that exist when current adjust ball valve is used for heavy oil processingequipment's high temperature oil gas pipeline.

In order to solve the above problem, the utility model adopts the following technical scheme: the utility model provides an adjust ball valve is equipped with valve body, valve rod, case, disk seat, filler, support, actuating mechanism, is equipped with valve body entry and valve body export on the valve body, is equipped with valve port, its characterized in that on the case: the inlet of the valve body is provided with a sealing seat and a sealing sleeve, the sealing seat consists of a sealing seat flange and a sealing seat central cylinder, the sealing seat central cylinder is arranged in the sealing sleeve, a gap is reserved between the part of the sealing seat central cylinder close to the sealing seat flange and the sealing sleeve, a sealing cavity is formed between the rest part of the sealing seat central cylinder and the sealing sleeve, a metal corrugated pipe or a disc spring is arranged in the sealing cavity, a valve seat is positioned between a valve core and the metal corrugated pipe or the disc spring, metal-to-metal elastic hard seal is formed between the valve core and the valve seat, the regulating ball valve is provided with a steam sweeping connecting pipe, one steam sweeping connecting pipe is connected with a steam sweeping, the outlets of the steam purging channels are respectively positioned at the filling position, between the bottom of the valve core bottom supporting position and the inner cavity surface of the valve body, between the part of the central cylinder of the sealing seat close to the flange of the sealing seat and the sealing sleeve and on the inner cavity surface of the valve body.

Adopt the utility model discloses, following beneficial effect has: (1) under the action of the elastic force of the metal corrugated pipe or the disk spring and the pressure of oil gas, metal-to-metal elastic hard seal is formed between the valve core and the valve seat, the seal is tight, and a large amount of oil gas can be prevented from leaking. (2) And (3) introducing steam into each steam sweeping connecting pipe, wherein the steam enters between the filler, the bottom of the valve core bottom supporting part and the inner cavity surface of the valve body, the sealing cavity and the inner cavity of the valve body through the steam sweeping channel to sweep, so that the coke powder and the heavy oil component easy to coke are prevented from being coalesced at the parts (see the description of the specific embodiment part of the specification for details). Therefore, the valve rod and the valve core can flexibly rotate, and the metal corrugated pipe or the disc spring keeps good elasticity, so that the adjusting performance and the sealing performance of the adjusting ball valve are ensured, and long-period operation is realized.

The utility model discloses mainly used oil refinery heavy oil processingequipment's high temperature oil gas pipeline is last.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The drawings and detailed description do not limit the scope of the invention as claimed.

Drawings

Fig. 1 is a schematic structural diagram of the adjusting ball valve of the present invention.

Fig. 2 is a sectional view a-a in fig. 1.

The bracket and actuator are shown in fig. 1 without a cross-section. In fig. 1 and 2, the same reference numerals denote the same technical features. The reference numerals denote: 1-a valve body; 21-a first steam purge connection; 22-a second steam purge connection; 23-a third steam purge connection; 24-a fourth steam purge connection; 25-a fifth steam purge connection; 3-a drive pin; 4-a valve stem; 5-valve seat; 6-a filler; 7-a scaffold; 8-an actuator; 9-a valve core; 10-a packing gland; 11-stuffing box; 12-a sealing seat; 13-sealing the sleeve; 14-an end cap; 15-bottom axis; 16-metal bellows or belleville springs; 17-steam distribution groove.

Detailed Description

Referring to fig. 1 and 2, the adjusting ball valve of the present invention is provided with a valve body 1, a valve rod 4, a valve core 9, a valve seat 5, a filler 6, a support 7, and an actuating mechanism 8. The valve core 9 is positioned in the inner cavity of the valve body 1, the bottom of the valve rod 4 is connected with the top supporting part of the valve core 9 through the transmission pin 3, and the support 7 is fixed on the valve body 1 through a bolt. The bottom supporting part of the valve core 9 and the bottom of the valve body 1 are provided with bottom shaft holes, bottom shafts 15 are arranged in the bottom shaft holes, and end covers 14 are arranged below the bottom shaft holes at the bottom of the valve body 1. The valve rod 4 is coaxial with the bottom shaft 15, and the valve core 9 can rotate around the bottom shaft 15. The valve rod 4 penetrates through the center of the stuffing box 11, and the stuffing 6 is arranged outside the valve rod 4 and in the cavity of the stuffing box 11 and is tightly pressed by the stuffing gland 10. The filler 6 is divided into an upper group and a lower group, and a spacing ring is arranged between the two groups. The valve body 1 is provided with a valve body inlet and a valve body outlet, and the valve body inlet and the valve body outlet are generally circular. The valve core 9 is a part spherical valve core, and is provided with a valve port which can be a V-shaped valve port or an arc-shaped valve port and the like.

The inlet of the valve body is provided with a sealing seat 12 and a sealing sleeve 13, and the sealing seat 12 consists of a sealing seat flange and a sealing seat central cylinder. The seal seat central cylinder is arranged in the seal sleeve 13, and a gap is left between the part of the seal seat central cylinder close to the seal seat flange and the seal sleeve 13 and is communicated with a seal cavity chamber which is described below. A sealing cavity with a circular cross section is formed between the rest part of the central cylinder of the sealing seat and the sealing sleeve 13, a metal corrugated pipe or a disc spring 16 is arranged in the sealing cavity, and the metal corrugated pipe or the disc spring 16 can generally resist the high temperature of 500-550 ℃. The valve seat 5 is positioned between the valve core 9 and the metal corrugated pipe or the disc spring 16, one part of the valve seat 5 is positioned in the sealing cavity, and a gap is reserved between the valve seat 5 and the sealing sleeve 13 and the central cylinder of the sealing seat. The valve seat 5 is preferably designed in a scraper type structure, so that coke powder and heavy oil components which are easy to coke on the spherical surface of the valve core 9 can be removed.

The adjusting ball valve is provided with a plurality of steam purging connecting pipes, and one steam purging connecting pipe is connected with one steam purging channel. The outlets of the steam purging channels are respectively positioned at the position of the filler 6, between the bottom of the supporting part at the bottom of the valve core 9 and the surface of the inner cavity of the valve body 1, between the part of the central cylinder of the sealing seat close to the flange of the sealing seat and the sealing sleeve 13 and on the surface of the inner cavity of the valve body 1.

The modulating ball valve shown in fig. 1 and 2 is provided with a first steam purge connection 21, a second steam purge connection 22, a third steam purge connection 23, a fourth steam purge connection 24 and a fifth steam purge connection 25. The purging channel connected with the first steam purging connecting pipe 21 is opened on the stuffing box 11, and the outlet is positioned at the position of the spacer ring between the two groups of stuffing 6. The purging channel connected with the second steam purging connection pipe 22 is opened on the end cover 14 and the bottom shaft 15, and the outlet(s) are positioned between the bottom of the bottom supporting part of the valve core 9 and the inner cavity surface of the valve body 1. The purging channel connected with the third steam purging connecting pipe 23 is arranged on the valve body 1 and the sealing sleeve 13, and the outlet is positioned between the part of the central cylinder of the sealing seat close to the flange of the sealing seat and the sealing sleeve 13. The purging channels connected with the fourth steam purging connecting pipe 24 and the fifth steam purging connecting pipe 25 are all opened on the valve body 1, and the outlets are positioned on the surface of the inner cavity of the valve body 1.

The part of the central cylinder of the surrounding sealing seat, which is close to the flange of the sealing seat, can be provided with a steam distribution groove 17, and the part of the central cylinder of the sealing seat, which is close to the flange of the sealing seat, is communicated with the outlet of the steam sweeping channel between the sealing sleeve 13 and the steam distribution groove 17, so that steam can be better distributed.

The sealing sleeve 13 is generally cylindrical in shape and is divided into two halves along its axial centerline, with the outer sidewall abutting the inner wall of the valve body inlet. The end part of the sealing sleeve 13 close to the sealing seat flange is provided with an annular boss protruding inwards and clamped in a groove on the part of the sealing seat central cylinder close to the sealing seat flange.

The sealing surfaces (spherical surfaces) on the valve core 9 and the valve seat 5 can be provided with chromium coatings or hard alloy layers so as to improve the wear resistance and be beneficial to removing coke powder and heavy oil components which are easy to coke on the sealing surfaces.

The valve body 1 may be a segmented valve body or a unitary valve body. The actuator 8 may be an existing pneumatic, electric or electro-hydraulic actuator, with a spare manual actuator.

The utility model discloses when normal use, actuating mechanism 8 drive valve rod 4, and then through the axis line rotation that valve pin 3 drive plug 9 centers on valve rod 4 and bottom shaft 15. Along with the rotation of the valve core 9 at different angles, the valve port on the valve core 9 exposes opening areas with different sizes at the inlet of the valve body, so that the adjustment of oil gas flow and pressure control are realized. After the valve port area is fully opened, the valve core 9 is rotated to enable the edge of the outer circle of the valve core 9 to cross the inner circular surface of the valve body inlet, so that a larger opening area can be formed, and larger flow regulation can be realized. Under the action of the elastic force of the metal bellows or the disk spring 16 and the oil gas pressure, a metal-to-metal elastic hard seal and a spherical seal are formed between the valve core 9 and the valve seat 5.

During the use process of the adjusting ball valve, steam (water vapor) is introduced into the first steam purging connecting pipe 21, and the steam enters the packing 6 through the spacer ring for purging. And introducing steam into the second steam purging connecting pipe 22, wherein the steam enters between the bottom of the bottom supporting part of the valve core 9 and the inner cavity surface of the valve body 1 for purging. And introducing steam into the third steam purging connecting pipe 23, wherein the steam enters between the part of the central cylinder of the sealing seat close to the flange of the sealing seat and the sealing sleeve 13 through the steam distribution groove 17 and then enters the sealing cavity to purge the metal corrugated pipe or the disc spring 16 and the valve seat 5. And introducing steam into the fourth steam purging connecting pipe 24 and the fifth steam purging connecting pipe 25, and introducing the steam into the inner cavity of the valve body 1 for purging. The blowing of each steam can prevent coke powder and heavy oil components easy to coke from coalescing at the parts, so that the valve rod 4 and the valve core 9 can flexibly rotate, and the metal corrugated pipe or the disc spring 16 keeps good elasticity, thereby ensuring the adjusting performance and the sealing performance of the adjusting ball valve and realizing long-period operation.

And after sweeping the parts, each steam is converged in the inner cavity of the valve body 1. The coke powder and the heavy oil component which is easy to coke are blown away and flow out from the valve body outlet along with the blowing steam and the oil gas.

Claims

1. The utility model provides an adjust ball valve, is equipped with valve body (1), valve rod (4), case (9), disk seat (5), filler (6), support (7), actuating mechanism (8), is equipped with valve body entry and valve body export on valve body (1), is equipped with the valve port on case (9), its characterized in that: a sealing seat (12) and a sealing sleeve (13) are arranged at the inlet of the valve body, the sealing seat (12) consists of a sealing seat flange and a sealing seat central cylinder, the sealing seat central cylinder is arranged in the sealing sleeve (13), a gap is reserved between the part of the sealing seat central cylinder close to the sealing seat flange and the sealing sleeve (13), a sealing cavity is formed between the rest part of the sealing seat central cylinder and the sealing sleeve (13), a metal corrugated pipe or a disc spring (16) is arranged in the sealing cavity, a valve seat (5) is positioned between a valve core (9) and the metal corrugated pipe or the disc spring (16), a metal-to-metal elastic hard seal is formed between the valve core (9) and the valve seat (5), the adjusting ball valve is provided with a steam sweeping connecting pipe, one steam sweeping connecting pipe is connected with one steam sweeping channel, the outlet of each steam sweeping channel is respectively positioned at the position of the filler (6), the bottom of the bottom supporting part of the valve core (9), The part of the central cylinder of the sealing seat, which is close to the flange of the sealing seat, is arranged between the sealing sleeve (13) and the inner cavity surface of the valve body (1).

2. The modulating ball valve of claim 1, wherein: a steam distribution groove (17) is arranged around the part of the central cylinder of the sealing seat, which is close to the flange of the sealing seat, and the outlet of a steam sweeping channel between the part of the central cylinder of the sealing seat, which is close to the flange of the sealing seat, and the sealing sleeve (13) is communicated with the steam distribution groove (17).

3. An adjusting ball valve according to claim 1 or 2, wherein: the sealing sleeve (13) is cylindrical and is divided into two parts along the axial lead.

4. An adjusting ball valve according to claim 1 or 2, wherein: the sealing surfaces of the valve core (9) and the valve seat (5) are provided with chromium coatings or hard alloy layers.

5. An adjusting ball valve according to claim 1 or 2, wherein: the valve body (1) is a sectional valve body or an integral valve body.

6. An adjusting ball valve according to claim 1 or 2, wherein: the actuating mechanism (8) is a pneumatic, electric or electro-hydraulic actuating mechanism.