Search

CN-224214739-U - Low-torque high-performance ball valve

CN224214739UCN 224214739 UCN224214739 UCN 224214739UCN-224214739-U

Abstract

The utility model discloses a low-torque high-performance ball valve which comprises a left valve body, a middle valve body and a right valve body, wherein a valve cavity is formed after the left valve body, the middle valve body and the right valve body are assembled, a left valve seat, a valve ball and a right valve seat are arranged in the valve cavity, a valve rod installation through hole is formed in the upper end of the middle valve body, a valve rod is arranged in the valve rod installation through hole, the lower end of the valve rod stretches into the valve cavity to be connected with the upper end of the valve ball, the upper end of the valve rod is exposed out of the valve rod installation through hole, a lubrication system is arranged between the valve rod and the middle valve body, the lubrication system comprises a valve rod axial oil hole, a valve rod radial through oil hole, a valve rod circumferential oil groove and a valve rod axial oil groove which are arranged in the valve rod, an oil cup installation groove is formed in the upper end of the valve rod, and the upper end of the valve rod is communicated with the oil cup, the valve rod axial oil hole, the valve rod radial through oil hole and the valve rod circumferential oil groove. Above-mentioned technical scheme, structural design is reasonable, sealing performance is good, long service life and practicality are good.

Inventors

  • HU XUEWEI
  • HU JIANTIAN
  • LIU ZAN

Assignees

  • 欧维克集团有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (7)

  1. 1. The utility model provides a low-torque high-performance ball valve, includes left valve body (1), well valve body (2) and right valve body (3), form a valve pocket (4) after left valve body (1), well valve body (2) and right valve body (3) are assembled, be provided with left disk seat (5), valve ball (6) and right disk seat (7) in valve pocket (4), well valve body (2) upper end is provided with valve rod installation through-hole (21), be provided with valve rod (8) in valve rod installation through-hole (21), valve rod (8) lower extreme stretches into valve pocket (4) and valve ball (6) upper end and is connected, valve rod (8) upper end exposes valve rod installation through-hole (21) and sets up, characterized in that be provided with lubrication system between valve rod (8) and well valve body (2), this lubrication system includes valve rod axial oilhole (81) that set up in valve rod (8), valve rod radial through-hole (82), valve rod circumference oil groove (83) and valve rod axial oil guide groove (84), the upper end of valve rod axial oilhole (81) is provided with an oil cup mounting groove (85), valve rod (8) upper end is provided with oil cup (85) and oil cup (9) are installed in oil cup (9), the lower end of the valve rod axial oil hole (81) is communicated with the valve rod radial through oil hole (82), the valve rod circumferential oil groove (83) is arranged at the outer port position of the valve rod radial through oil hole (82), and the upper end of the valve rod axial oil guide groove (84) is communicated with the valve rod circumferential oil groove (83).
  2. 2. The low-torque high-performance ball valve according to claim 1, wherein a first bearing mounting groove is formed in the lower port position of the middle valve body (2) located in the valve rod mounting through hole (21), a gland mounting groove, a packing groove and a second bearing mounting groove are formed in the inner wall surface of the valve rod mounting through hole (21) from top to bottom in sequence, a first bearing assembly (10) is arranged in the first bearing mounting groove, a gland (11) is arranged in the gland mounting groove, a packing layer (12) is arranged in the packing groove, the lower end surface of the gland (11) presses the upper end surface of the packing layer (12), a second bearing (13) is arranged in the second bearing mounting groove, a gland (11) is aligned with the valve rod mounting through hole, a third bearing (14) is arranged in the third bearing mounting groove, and the inner wall surface of the third bearing (14) is partially communicated with the valve rod axial oil guide groove (84) and the circumferential oil groove (83).
  3. 3. The low-torque high-performance ball valve according to claim 2, wherein an oil cup inner cavity (91) is formed in the oil cup (9), a lubricating oil inlet (92) is formed in the upper end face of the oil cup (9), the lubricating oil inlet (92) is communicated with the oil cup inner cavity (91), a lubricating oil outlet (93) is formed in the lower end face of the oil cup (9), the oil cup inner cavity (91) is communicated with the lubricating oil outlet (93), a reset spring (94) and a ball body (95) are arranged in the oil cup inner cavity (91), and the ball body (95) props against the lower port of the lubricating oil inlet (92) under the elastic force of the reset spring (94).
  4. 4. The low-torque high-performance ball valve of claim 3, wherein the inner wall surface of the oil cup mounting groove (85) is provided with internal threads, the lower end of the oil cup (9) is provided with an external thread connecting part, and the oil cup (9) is fixedly connected with the internal threads in the oil cup mounting groove through the external thread connecting part.
  5. 5. A low torque high performance ball valve according to claim 4, wherein the lower end of the valve rod (8) is integrally provided with a blow-out preventing projection (86), and the upper end surface of the blow-out preventing projection (86) is connected with the lower end surface of the first bearing assembly (10).
  6. 6. The low-torque high-performance ball valve according to claim 5, wherein an annular groove (87) is formed in a part of the valve rod (8), a valve rod O-shaped sealing ring (15) is arranged in the annular groove (87), and the valve rod (8) is sealed with the inner wall surface of the valve rod installation through hole (21) through the valve rod O-shaped sealing ring (15).
  7. 7. The low-torque high-performance ball valve according to claim 1 or 6 is characterized in that a valve body O-shaped sealing ring (16), a metal winding sealing gasket (17) and an all-metal sealing structure (18) are sequentially arranged between the left valve body (1), the middle valve body (2) and the right valve body (3) from inside to outside.

Description

Low-torque high-performance ball valve Technical Field The utility model relates to the technical field of ball valves, in particular to a low-torque high-performance ball valve. Background The small-caliber high-pressure ball valve is widely applied in the petroleum and chemical industries, and the performance and the reliability of the ball valve relate to the safety and the production efficiency of pipelines and devices. The ball valve structure in the prior art has the defects that the structural design is unreasonable, the dynamic seal leakage of the valve rod often occurs after the ball valve is used for a period of time, the static seal leakage between the middle body and the left and right bodies occurs, the moment can be increased in the opening and closing process of the valve, and the like, which have serious influence on the reliability and performance of the product, so that the service life is short and the practicability is poor. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model aims to provide the low-torque high-performance ball valve which is reasonable in structural design, good in sealing performance, long in service life and good in practicability. In order to achieve the purpose, the low-torque high-performance ball valve comprises a left valve body, a middle valve body and a right valve body, wherein a valve cavity is formed after the left valve body, the middle valve body and the right valve body are assembled, a left valve seat, a valve ball and a right valve seat are arranged in the valve cavity, a valve rod installation through hole is formed in the upper end of the middle valve body, a valve rod is arranged in the valve rod installation through hole, the lower end of the valve rod extends into the valve cavity to be connected with the upper end of the valve ball, the upper end of the valve rod is exposed out of the valve rod installation through hole, a lubrication system is arranged between the valve rod and the middle valve body, the lubrication system comprises a valve rod axial oil hole, a valve rod radial through oil hole, a valve rod circumferential oil groove and a valve rod axial oil groove which are arranged in the valve rod, an oil cup installation groove is formed in the upper end of the valve rod axial oil hole, the lower end of the valve rod is arranged in the oil cup installation groove, the oil cup is communicated with the valve rod axial oil hole, the lower end of the valve rod radial through hole is communicated with the valve rod axial oil groove, the valve rod circumferential oil groove is arranged at the radial through hole through the outer port of the valve rod axial oil groove, and the upper end of the valve rod axial oil groove is communicated with the valve rod axial oil groove. The valve is further characterized in that a first bearing mounting groove is formed in the position, located at the lower port of the valve rod mounting through hole, of the middle valve body, a gland mounting groove, a packing groove and a second bearing mounting groove are formed in the inner wall surface of the valve rod mounting through hole in sequence from top to bottom, a first bearing assembly is arranged in the first bearing mounting groove, a gland is arranged in the gland mounting groove, a packing layer is arranged in the packing groove, the lower end surface of the gland presses the upper end surface of the packing layer, a second bearing is arranged in the second bearing mounting groove, a gland valve rod through hole is formed in the position, aligned with the valve rod mounting through hole, of the gland, a third bearing is arranged at the lower end of the inner wall surface of the gland valve rod through hole, and the inner wall surface of the third bearing is partially communicated with the valve rod axial oil guide groove and the valve rod circumferential oil groove. The oil cup is further provided with an oil cup inner cavity, the upper end face of the oil cup is provided with a lubricating oil inlet which is communicated with the oil cup inner cavity, the lower end face of the oil cup is provided with a lubricating oil outlet, the oil cup inner cavity is communicated with the lubricating oil outlet, the oil cup inner cavity is internally provided with a reset spring and a ball body, and the ball body props against the lower port of the lubricating oil inlet under the action of the elasticity of the reset spring. The oil cup mounting groove is further provided with internal threads, the lower end of the oil cup is provided with an external thread connecting part, and the oil cup is fixedly connected with the internal threads in the oil cup mounting groove through the external thread connecting part. The utility model is further characterized in that the lower end of the valve rod is integrally provided with an anti-blowout lug, and the upper end face of the anti-blowout lug is connected with the lower end face of th