Unlock instant, AI-driven research and patent intelligence for your innovation.

A coaxial locking anti-jamming gate valve switching method and switching device

A switching device, gate valve technology, applied in valve device, valve operation/release device, valve details, etc., can solve problems such as wear and jam, reduce opening force and scratches, etc.

Active Publication Date: 2019-05-17
潘健
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the above method, the traditional single ram sealing method can be changed into an integral two-plate tension seal and the gap slides up and down, which solves the problem of wear and stickiness between the ram and the sealing surface of the valve body, and greatly reduces the gap sliding Opening force and galling defects, while significantly improving the sealing effect of gate valves

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A coaxial locking anti-jamming gate valve switching method and switching device
  • A coaxial locking anti-jamming gate valve switching method and switching device
  • A coaxial locking anti-jamming gate valve switching method and switching device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: with reference to attached Figure 1-10

[0041] The rotary compression mechanism includes an elliptical shaft 18 fixedly provided at the lower end of the valve stem 7 and lugs 19.2 fixedly installed symmetrically on the two gates 19 respectively or lugs 19.2 installed by adjusting pads 19.3 and screws 25. The elliptical The shaft 18 has an elliptical cross-section; the elliptical shaft 18 is provided with an annular groove 27, and the lug 19.2 is placed in the annular groove 27, and the elliptical shaft 18 and the two gates 19 The inner surface is in line contact, and the pressure between the elliptical shaft 18 and the inner surfaces of the two gates 19 gradually increases when it rotates from the short axis side to the long axis side, and the above measures can be used to realize the sealing method through the flexible connection. Integral tension seal, the short axis side of the elliptical shaft 18 realizes the relative change of the position of the r...

Embodiment 2

[0042] Embodiment 2: with reference to attached Figure 11

[0043] The rotary pressing mechanism includes a protrusion 18.1 with an elliptical cross-section and an annular protrusion fixed at the lower end of the valve stem 7 from bottom to top in sequence. The cross-section is an elliptical structure, and the two gates II 19.4 are sequentially provided with grooves corresponding to the protrusion 18.1 and the annular protrusion with an elliptical cross-section from bottom to top. The protrusion 18.1 of the section is in line contact with the bottom surface of the corresponding groove on the two gates II 19.4, and the protrusion 18.1 with an elliptical cross-section is in contact with the two gates when it rotates from the short axis side to the long axis side. The pressure between the bottom surfaces of the grooves below the plate II 19.4 increases gradually. Adopting the above-mentioned measures can realize the sealing method to complete the integral tension-tight seal th...

Embodiment 3

[0044] Embodiment 3: with reference to attached Figure 12

[0045] The rotary compression mechanism includes a circular shaft II 18.2 fixed at the lower end of the valve stem 7 and a follower sleeve 20. The fixation is fixedly connected or disassembled. Threaded fixed connection, the valve stem 7 and the upper opening connection of the follower sleeve 20 are provided with an anti-loosening gasket 21; adopting further optimal measures can improve the connection and anti-loosening effect of the follower sleeve 20 and the valve stem 7, The follower sleeve 20 is a three-way structure, and the two gates III19.5 are provided with protrusions corresponding to the two coaxial openings of the follower sleeve 20. The follower sleeve 20 The inner diameter of the upper opening is greater than the outer diameter of the valve stem located at the opening and less than the length of the long axis of the circular shaft II18.2, which is connected with the two gates placed in the follower slee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a turning-on or turning-off method and device for a coaxial locking anti-blocking gate valve. Two gates are used to carry out turning-on action or turning-off action; when the gate valve is turned off, the two gates fall down, are in position and press to the two sides to complete the turning-off action of the gate valve, and when the gate valve is turned on, the two gates are retracted inwards and move upwards to complete the turning-on action of the gate valve. According to the method, the invention further provides the turning-on or turning-off device for the coaxial locking anti-blocking gate valve; the turning-on or turning-off device comprises a valve rod, a valve body and gates embedded into the valve body, and the two gates are arranged; the turning-on or turning-off device for the gate valve comprises a gate lifting device and a gate pressing and retracting device, the gate lifting device is fixedly connected with the upper end of the valve rod, the lower end of the valve rod is connected with the gates, and the gate pressing and retracting device is connected with the gates. The turning-on or turning-off method and device have the advantages that the jammed gate valve problem, the incompact turning-off problem and the large turning-on force problem which are caused by the large tightening force between the valve gates and the valve body in the working process are solved, and meanwhile on-off failing of the valve can be effectively prevented with the peripheral-shaft-rotating on-off locking mode.

Description

technical field [0001] The invention relates to the technical field of gate valves, in particular to a coaxial locking anti-seize gate valve switching method and a switching device. Background technique [0002] At present, the gate valve is one of the most commonly used shut-off valves. It is mainly used to connect or cut off the medium in the pipeline, and is mainly used in medium and large diameter pipelines. Existing gate valves are closed by wedge-shaped tight force sealing. When the gate valve is opened, due to the large tight force on the sealing surface and the pressure difference between the front and back of the valve, the gate valve is easy to jam and the opening force is increased. At the same time, the sealing surface is prone to scratches. When opening and closing, there is relative sliding between the two sealing surfaces of the valve plate and the valve seat. When there is a tight force, scratches are easy to occur under the opening and closing of the valve, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/122F16K3/02F16K3/30
CPCF16K3/0227F16K3/30F16K31/122
Inventor 潘健
Owner 潘健