CN-224214748-U - Kettle bottom discharging ball valve

CN224214748UCN 224214748 UCN224214748 UCN 224214748UCN-224214748-U

Abstract

The application provides a kettle bottom discharging ball valve, which solves the problems of local abrasion and leakage of a valve seat caused by unbalanced acting force between a ball body and an upper valve seat due to inclination of a valve rod of the existing kettle bottom discharging ball valve. The valve comprises a valve body, a kettle bottom flange, an auxiliary valve body, a spherical valve cavity, a spherical core, an inclined valve rod, an upper valve seat assembly and an elastic compensation structure. The upper valve seat assembly comprises a first elastic sealing ring and a rigid backing ring, the elastic compensation structure applies elastic pressure to the rigid backing ring through a plurality of independent elastic pieces, so that the rigid backing ring acts on the elastic sealing ring, a second mounting groove on the auxiliary valve body accommodates the first elastic sealing ring and the rigid backing ring, and the wall of the rigid backing ring is provided with a gap with the wall of the second mounting groove, so that the rigid backing ring can incline, the sealing pressure of different parts is balanced, and the sealing performance and the service life are improved.

Inventors

SHEN WEIGUANG
CHEN SHUANGSHUANG
ZHOU YAQUN
Yu Sunjie
XU TIANCHI
You Tongping

Assignees

浙江新欧自控仪表有限公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (10)

1. The utility model provides a cauldron end blowing ball valve, includes the valve body, installs at the bottom of the cauldron flange on the valve body, installs in the vice valve body of cauldron end flange inner periphery, sets up at the internal spherical valve pocket of valve body and vice valve, installs the ball core in spherical valve pocket to and be the slope downwards setting and be used for driving relative cauldron end flange center pin ball core pivoted valve rod, its characterized in that still includes: An upper valve seat assembly mounted within the secondary valve body and adapted to form a seal with an upper portion of the ball core; the upper valve seat assembly comprises a first elastic sealing ring and a rigid backing ring, and the rigid backing ring is positioned on one side of the first elastic sealing ring away from the ball core; The elastic compensation structure is provided with a plurality of elastic pieces which are arranged independently, and the elastic compensation structure forms a plurality of independent elastic pressures towards the first elastic sealing ring for the rigid backing ring through the plurality of elastic pieces which are arranged independently; The auxiliary valve body is provided with a second mounting groove for accommodating the first elastic sealing ring and the rigid backing ring, and gaps are reserved between the inner periphery and the outer periphery of the rigid backing ring and the groove wall of the second mounting groove, so that the rigid backing ring can incline relative to the mounting groove.
2. The kettle bottom discharging ball valve according to claim 1, wherein the elastic piece comprises a plurality of first springs and a plurality of second springs, the first springs and the second springs are arranged at the upper end of the rigid backing ring, the first springs are distributed at the position, close to the periphery, of the rigid backing ring and the plurality of first springs are uniformly distributed in a ring shape, the second springs are distributed at the position, close to the inner periphery, of the rigid backing ring and the plurality of second springs are uniformly distributed in a ring shape.
3. The kettle bottom discharge ball valve of claim 1, wherein the upper valve seat assembly further comprises a first rigid sealing ring, a lower end surface of the first rigid sealing ring is provided with a first hard sealing surface attached to the outer peripheral surface of the ball core.
4. The kettle bottom discharging ball valve according to claim 3, wherein the first rigid sealing ring is located at the inner periphery of the first elastic sealing ring, a conical surface is arranged on the inner periphery of the first hard sealing surface on the lower end surface of the first rigid sealing ring, and a scraper gap is formed between the conical surface and the outer peripheral surface of the ball core.
5. The kettle bottom discharging ball valve according to claim 3, wherein a second mounting groove in interference fit with the first elastic sealing ring is formed between the periphery of the first rigid sealing ring and the auxiliary valve body, and the rigid backing ring is in clearance fit with the second mounting groove.
6. The still bottom ball valve according to claim 3, further comprising a third elastic member acting on an upper end of the first rigid seal ring to act on the first rigid seal ring to make it fit to an outer peripheral surface of the ball core.
7. The kettle bottom drop ball valve of claim 1, further comprising a lower valve seat assembly mounted within the valve body for forming a seal with a lower portion of the ball core.
8. The kettle bottom discharge ball valve of claim 7, wherein the lower valve seat assembly comprises a second rigid sealing ring and a second elastic sealing ring, the second elastic sealing ring being embedded in an inner periphery of the second rigid sealing ring.
9. The kettle bottom discharging ball valve according to claim 8, wherein a third mounting groove for accommodating the second rigid sealing ring is formed in the valve body, a fourth mounting groove is formed in the inner periphery of the second rigid sealing ring, and the second elastic sealing ring is embedded in the fourth mounting groove.
10. The kettle bottom discharging ball valve according to claim 8 or 9, wherein a second hard sealing surface attached to the outer peripheral surface of the ball core is arranged on the inner periphery of the second rigid sealing ring, a second elastic sealing surface attached to the outer peripheral surface of the ball core is arranged on the inner periphery of the second elastic sealing ring, and a separation belt is formed in the middle of the second hard sealing surface by the second elastic sealing surface.

Description

Kettle bottom discharging ball valve Technical Field The application relates to a ball valve, in particular to a kettle bottom discharging ball valve. Background The Chinese patent CN202320291473.6 discloses a novel pneumatic kettle bottom discharging ball valve, which comprises a valve body, a valve cover and an auxiliary valve body which are arranged on the valve body, spherical valve cavities arranged in the valve body and the auxiliary valve body, a spherical core arranged in the spherical valve cavities, and valve seats which are arranged on the valve body and the auxiliary valve body and are matched with the spherical core, and is characterized by further comprising a valve rod mechanism which is arranged on the valve body and is arranged in a downward inclined manner, wherein the valve rod mechanism comprises a valve rod with one end fixedly connected with the spherical core, and the auxiliary valve body and the valve cover are also provided with downward concave spherical surfaces. According to the utility model, the valve rod mechanism is arranged on the side surface of the valve body and is arranged in a downward inclined manner, so that the actuating mechanism for driving the valve rod to act is obliquely arranged and forms a certain oblique angle with the bottom of the reaction kettle, interference between the actuating mechanism and the heat-insulating interlayer sleeve at the bottom of the reaction kettle is avoided, the overhanging height of the actuating mechanism can be shortened due to the oblique arrangement, the whole structure of the valve is compact, and meanwhile, the structural strength of the valve is improved. The above-mentioned prior art still has the following problems that the ball body forms a sealing effect through a single valve seat member from top to bottom, however, because the ball body is driven to pivot through a valve rod mechanism which is arranged in a downward inclined manner, the interaction force between the ball body and the upper valve seat is unbalanced, the sealing effect is unbalanced, and after long-term use, more local abrasion of the valve seat is easy to occur, so that leakage is easy to occur. Disclosure of utility model Aiming at the defects of the prior art, the application provides a kettle bottom discharging ball valve. The technical scheme is that the kettle bottom discharging ball valve comprises a valve body, a kettle bottom flange, a sub-valve body, a spherical valve cavity, a spherical core and a valve rod, wherein the kettle bottom flange is arranged on the valve body, the sub-valve body is arranged on the inner periphery of the kettle bottom flange, the spherical valve cavity is arranged in the valve body and the sub-valve body, the spherical core is arranged in the spherical valve cavity, the valve rod is obliquely downward arranged relative to the central axis of the kettle bottom flange and used for driving the spherical core to rotate, the valve seat assembly is arranged in the sub-valve body and used for forming sealing with the upper part of the spherical core, the upper valve seat assembly comprises a first elastic sealing ring and a rigid backing ring, the rigid backing ring is positioned on one side, far away from the spherical core, of the first elastic sealing ring, and an elastic compensation structure is provided with a plurality of elastic pieces which are independently arranged, the elastic compensation structure forms a plurality of elastic pressures which are independent and face the first elastic sealing ring, the rigid backing ring is formed by the plurality of elastic pieces, the second elastic sealing ring and the second sealing ring and the rigid backing ring are arranged on the sub-valve body, the second sealing ring is arranged on the side, the mounting ring and the periphery of the rigid backing ring and the rigid backing ring are provided with a gap between the mounting groove and the second sealing ring and the mounting groove. Further, the elastic piece comprises a plurality of first springs and a plurality of second springs, the first springs and the second springs are all arranged at the upper end of the rigid backing ring, the first springs are distributed at the position, close to the periphery, of the rigid backing ring and the plurality of first springs are distributed evenly in a ring shape, and the second springs are distributed at the position, close to the inner periphery, of the rigid backing ring and the plurality of second springs are distributed evenly in a ring shape. Further, the upper valve seat assembly further comprises a first rigid sealing ring, and a first hard sealing surface attached to the outer peripheral surface of the ball core is arranged on the lower end face of the first rigid sealing ring. Further, the first rigid sealing ring is located at the inner periphery of the first elastic sealing ring, a conical surface is arranged on the lower end face of the first rigid sealing ring at the