Planet pin roller spiral device, manufacturing method and forced seal ball valve

A planetary roller and screw device technology, applied in the direction of valve devices, cocks including cutting devices, engine components, etc., can solve the problem of affecting bearing capacity and working stability, increasing valve opening and closing operating torque, and reducing thread working life, etc. problems, to achieve the effect of improving operational reliability and working life, reducing friction and improving working life

Active Publication Date: 2018-01-19
ZIBO VOTAISI PETROCHEM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when used in large-diameter high-pressure pipelines, the valve ball needs to withstand high pressure, which will generate huge friction on the contact surface of the thread, resulting in an increase in the operating torque of the valve opening and closing, resulting in difficult operation, and will seriously reduce the working life of the thread.
The use of the planetary roller screw device is the way to solve this technical problem, but due to the limited structural space, the length of the driving thread and the length of the planetary roller of the screw-driven forced sealing ball valve are restricted, which will affect its carrying capacity and work. stability
In addition, since the planetary rollers in the planetary roller screw device need to be in contact with the top protrusion in the track change groove to achieve track change, the frequent friction between the planetary rollers and the top protrusion will cause potential failure risks

Method used

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  • Planet pin roller spiral device, manufacturing method and forced seal ball valve
  • Planet pin roller spiral device, manufacturing method and forced seal ball valve
  • Planet pin roller spiral device, manufacturing method and forced seal ball valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Figure 7 , Figure 8 , a planetary roller screw top pressure forced sealing ball valve. It includes a valve seat 41, a valve ball and a valve stem 42. The valve ball includes a valve ball body 43 and a valve disc 20. The valve ball body is provided with a screw drive wheel 10 that drives the valve disc to lift and retract. The screw drive wheel passes through the planetary The roller screw unit drives the disc. In this embodiment, discs are provided at both the inlet end and the outlet end of the ball valve. The valve stem drives a sealed driving gear to rotate, and at the same time, the valve ball body is driven to rotate by the torsion spring. When the valve ball body rotates to the closed position, the valve stem drives the valve stem gear 44 to continue to rotate, and the valve stem gear drives the screw drive wheel to rotate. The valve clack is pushed out and pressed against the valve seat to realize the sealing and closing of the forced sealing ball va...

Embodiment 2

[0067] Such as Figure 9 , a planetary roller screw top pressure forced sealing ball valve. This embodiment is a structural replacement of the first embodiment.

[0068] In this embodiment, the screw drive wheel 10a is provided with a screw hole, and the valve disc 20a is provided with a stud; the pitch of the stud and the screw hole is the same, and a plurality of planetary rollers 30 are arranged between the stud and the screw hole, and the planetary rollers The column is arranged between the stud and the screw hole through the cage 32, a threaded track changing groove 22 is arranged axially on the stud of the valve disc, and a top protrusion is arranged at the end of the threaded track changing groove.

[0069] The bottom surface of the threaded rail change groove is provided with a spring sheet 15, on which a flattening block 16 is arranged, the flattening block is provided with a counterbore, and a hot-melt gasket and a fastening screw 18 are arranged in the counterbore,...

Embodiment 3

[0071] A planetary roller screw top pressure forced sealing ball valve. This embodiment is a structural extension of Embodiment 1 or Embodiment 2.

[0072] In this embodiment, the stud component is provided with multiple turns of concentric studs, and the screw hole component is provided with multiple turns of concentric screw holes corresponding to the studs. By adopting the structure of this embodiment, the large-diameter forced sealing ball valve can be better adapted to the application of high-pressure pipelines.

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Abstract

The invention relates to a planet pin roller spiral device, a manufacturing method and a forced seal ball valve. The planet pin roller spiral device comprises a stud component provided with a stud anda screw hole component provided with a screw hole. A plurality of planet pin rollers are arranged between the stud and the screw hole and arranged between the stud and the screw hole through a retainer. A thread rail replacing groove is formed in the stud in the axial direction, and a top protrusion is arranged at the end of the thread rail replacing groove. An assembling method comprises the steps that a filling-in block is pressed on a leaf spring through a fastening screw via a hot melting gasket, and the leaf spring is compressed towards the bottom face of the thread rail replacing groove; and after the screw hole component is screwed in place, the thread rail replacing groove and the top protrusion part of the stud component are heated, and the filling-in block is elevated under theaction of the leaf spring. The planet pin roller spiral device, the manufacturing method and the forced seal ball valve have the beneficial effects that the friction force in the thread drive processcan be obviously reduced, the operation torque during valve opening and closing is reduced, and the working life of the forced seal ball valve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of ball valves, and in particular relates to a planetary roller screw device, a manufacturing method and a forced sealing ball valve. Background technique [0002] In the field of fluid control, such as oil and gas production process switching, pipeline shut-off, metering, pressure regulation, molecular sieve switching, compressor inlet and outlet, hydrogen working conditions in oil refining process, air separation of ammonia synthesis equipment, etc., frequent operations and fluid switch control and In the field with strict shut-off tightness, it is required that the valve can produce as little pressure drop as possible in the straight-through state, and can provide a forced torque seal that is not affected by the pressure of the pipeline medium. Positive sealing ball valves are recognized as the ideal solution. The Chinese invention patent (publication number CN105927750A) discloses a forced sealing ball ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/20F16K5/06
Inventor 徐珩
Owner ZIBO VOTAISI PETROCHEM EQUIP CO LTD
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