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Large-caliber forced sealing ball valve

A forced sealing and large-diameter technology, which is applied in the field of hydraulic valve control, can solve the problems of guide rail pin wear, mating surface wear, and gap enlargement, and achieve the effects of convenient processing and manufacturing, reducing local stress, and improving durability.

Active Publication Date: 2022-04-12
CHENGDU CHENGGAO VALVE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is mostly sliding friction between the guide rail pin and the track groove, the head end contact part of the guide rail pin is severely worn, and the mating surface of the track groove is also severely worn
The gap between the guide rail pin and the track groove becomes larger due to wear, which makes the angular position of the valve stem deviate from the correct limit position when the valve stem rotates to the limit position, which makes it difficult to achieve reliable sealing between the sealing surface of the ball and the valve seat. seal
Moreover, forced sealing ball valves are mostly used in sparsely populated field transportation environments, so real-time detection and maintenance of ball valves cannot be achieved

Method used

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  • Large-caliber forced sealing ball valve
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  • Large-caliber forced sealing ball valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] as attached figure 1 - attached Figure 4 As shown, the present invention provides a large diameter forced sealing ball valve, which includes:

[0042] Valve body 1, bonnet 2, rail pin 3, and valve stem 4; wherein, the upper end of valve body 1 is provided with an opening and a mounting surface, and the mounting surface and the flange at the lower end of bonnet 2 are connected by bolts and nuts; the ball ( (not shown in the figure) can be loaded into the valve body 1 from the opening; a valve stem 4 is arranged in the valve cover 2, a bracket 5 is arranged on the upper side of the valve cover 2, a driving motor 6 is arranged on the upper side of the bracket 5, and a driving motor 6 Drive the valve rod 4 to rotate, and further drive the ball to rotate; wherein, the valve rod 4 includes a threaded section 42, a polished rod section 43, and a driving section 44, and the driving section 44 is connected to the ball in transmission, and at least one track recess is provided ...

Embodiment 2

[0046] as attached figure 1 - attached Figure 4 In the shown guide structure, although the sliding friction between the guide rail pin and the track groove is changed into rolling friction, the end of the first guide rail pin 311 and the track groove are also sliding friction, and there is still wear and tear here. Serious technical problem. Moreover, the track grooves arranged in a rectangle are prone to stress concentration, which may easily cause damage to the valve stem during repeated use. In order to overcome the above-mentioned defects, the present invention further makes the following preferred embodiments.

[0047] as attached Figure 5 - attached Image 6 As shown in , the track groove 41 is an arc-shaped track groove 412, and the second guide rail pin 312 is fitted in the arc-shaped track groove 412, and the first ball 322, the base 332, the spiral Spring 342; wherein, the first sphere 322 is mounted on the base 332, and the other end matches the arc track gro...

Embodiment 3

[0051] attached Figure 5 - attached Image 6 In the shown guide structure, the friction with the arc-shaped track groove is reduced by arranging the first ball at the end of the second guide rail pin. However, since the first ball is in contact with the arc-shaped track groove during the entire use, the wear on the first ball is also relatively serious. In addition, the deviation of the track groove due to machining accuracy may lead to severe local wear between the track groove and the first ball, thereby causing a decrease in sealing performance. In order to solve the above problems, the present invention also provides the following embodiments.

[0052] as attached Figure 7 - attached Figure 9 As shown, the second rail pin 312 of the present invention is provided with a supporting device 35, and a plurality of second spheres 351 are evenly arranged on the supporting device 35, and one end of the second sphere 351 is against the first sphere 322, and the other end is ...

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PUM

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Abstract

The invention relates to a large-caliber forced sealing ball valve which comprises a valve body, a valve cover, a guide rail pin and a valve rod. Wherein the valve rod comprises a threaded section, a polished rod section and a driving section, the driving section is in transmission connection with the ball body, at least one rectangular rail groove is formed in the driving section, a mounting hole corresponding to the rectangular rail groove is formed in the valve cover, a first guide rail pin is mounted in the mounting hole, and the rectangular rail groove is matched with the first guide rail pin; wherein a bearing mounting part is arranged at the end part of the first guide rail pin, and a bearing is mounted on the bearing mounting part.

Description

technical field [0001] The invention belongs to the field of hydraulic valve control, in particular to a large-diameter forced sealing ball valve. Background technique [0002] Forced sealing ball valve is a kind of valve that uses the ball to rotate around the center line of the valve body to achieve opening and closing. Because of its sealing characteristics of forced sealing and frictionless opening and closing, it is widely used in occasions with strict sealing requirements such as metering devices for oil and gas transportation, pump inlets and bypasses, compressor inlets and outlets and bypasses. When the forced sealing ball valve is opened, the drive motor first drives the valve stem to lift to separate the ball from the valve seat, and then the valve stem continues to rise, and under the interaction between the guide pin on the bonnet and the track groove on the valve stem, the drive The ball turns without friction to the open position. When the valve is closed, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/22F16K5/08F16K27/06F16K27/08F16K37/00F16K31/04
Inventor 胥丹红曾和友曾寿平曾品其慕彦云童俊
Owner CHENGDU CHENGGAO VALVE