CN206669301U - A kind of high pressure draining ball valve - Google Patents

Abstract

A kind of high pressure draining ball valve, it includes valve body, spheroid, valve seat I, high temperature disc spring, hole back-up ring, spring seat cushion, filler, filler pressing sleeve, hold-down grid, valve rod, soket head cap screw, drive sleeve, drive link, holding screw, valve rod back-up ring, stud, nut, lock washer, flexible graphite sealing ring, valve seat II；Sealing employs relocatable form sealing between spheroid and valve seat I and valve seat II of the present utility model, under high pressure and the condition of high temperature, ensure that the tightness of sealing, and will not damage spheroid, valve seat I and valve seat II；Transmission valve rod and spheroid use concave-convex connection structure, prevent valve rod from being flown out using process, ensure spheroid non-loosening in the operating condition；Spheroid, valve seat I reduce jam with the contact surface roughness of valve seat II in more than Ra0.8 ranks, opening-closing process, further increase the service life of valve.

Description

A high pressure drain ball valve

technical field

The utility model relates to the field of valves, in particular to a high-pressure drain ball valve.

Background technique

Drain ball valves have been used in various pipelines for a long time. However, due to the long-term use and operation, and the multiple opening and closing processes and high temperature and high pressure conditions, the sealing performance will inevitably be affected, and the ball and the valve seat will be loose and leaky, which will have a great impact on the pipeline and subsequent work. The impact and bring great difficulty to the replacement or maintenance, will produce unnecessary economic losses.

Especially in the current production of power plants, once a failure occurs, the power plant will be partially shut down to replace the ball valves. However, the ball valves in power plants are large in size and heavy in weight. It is difficult and time-consuming to replace the ball valves manually. This will result in huge economic losses.

Therefore, improving the sealing life of the high-pressure drain ball valve in the power plant can achieve better economic benefits in the actual production process of the power plant.

Utility model content

The utility model provides a high-pressure hydrophobic ball valve aiming at the deficiencies of the above-mentioned prior art. The ball and the valve seat are sealed in a floating form to ensure the seal, and because the ball is floating, it will become tighter and tighter under high pressure, ensuring seal.

In order to solve the problems existing in the prior art, the concrete technical scheme adopted is:

A high-pressure hydrophobic ball valve, which includes a valve body, a ball, a valve seat I, a high-temperature disc spring, a retaining ring for a hole, a spring seat cushion, a packing, a packing pressure sleeve, a packing pressure plate, a valve stem, an inner hexagon screw, a transmission sleeve, and a transmission sleeve. Stem, set screw, stem retaining ring, stud, nut, lock washer, flexible graphite sealing ring, valve seat II;

The valve body is an inverted "T" shape, the left end of which is the water inlet, and the right end is the water outlet. From the water inlet to the right end of the water outlet, the cavity of the valve body is sequentially provided with retaining rings for holes, spring seat cushions, high temperature Disc spring, valve seat I, ball, valve seat II; the valve stem is located in the middle of the valve body, which passes through the packing pressure plate, packing gland, packing, and is connected with the ball; the packing pressure plate passes through studs, nuts, and lock washers Connected to the valve body; the transmission sleeve is installed on the valve body through a hexagon socket head screw, the upper end of the valve stem is provided with a square key to connect with the transmission sleeve and fastened by a set screw, and the valve stem and the transmission sleeve are provided with a valve stem retaining ring;

In a preferred solution, the connection between the valve stem and the sphere is concave-convex, the sphere is provided with a rectangular groove, and the valve stem is provided with a rectangular bump;

In a further preferred solution, the sphere is a solid body with a circular flow channel in the middle, and the roughness of the outer surface in contact with the valve seat I and the valve seat II is above Ra0.8;

In a further preferred solution, the compression stroke of the high-temperature disc spring is greater than the expansion strokes of the ball, valve seat I and valve seat II at a pressure below 63MPa and a temperature below 450°C.

The implementation process of a high-pressure drain ball valve is as follows:

The sealing between the ball and the valve seat I and the valve seat II realizes the floating seal through the high-temperature disc spring, and because the ball is floating, under high pressure and high temperature, the expansion of the ball and the valve seat I and the valve seat II will be caused by Compress the high-temperature disc spring to make it tighter and tighter, ensuring the seal without damaging the ball, seat I and seat II; the roughness of the contact surface of the ball, seat I and seat II is above Ra0.8, and the opening The closing process reduces jamming and further improves the service life of the valve.

By adopting the above scheme, a high-pressure drain ball valve of the present invention has the technical effect of:

1. The sealing between the ball and the valve seat I and the valve seat II of the utility model adopts a floating seal, which ensures the tightness of the seal under high pressure and high temperature conditions, and will not damage the ball, the valve seat I and the valve seat II.

2. The transmission valve stem and the ball of the utility model adopt a concave-convex connection structure, which prevents the valve stem from flying out during use, ensures that the ball does not loosen under working conditions, and greatly increases the service life of the valve.

3. The contact surface roughness of the sphere, valve seat I and valve seat II of the utility model is above Ra0.8, which reduces jamming during the opening and closing process and further improves the service life of the valve.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a high-pressure drain ball valve of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in combination with specific examples and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present invention.

As shown in Figure 1: a high-pressure hydrophobic ball valve, which includes a valve body 1, a ball 2, a valve seat I3, a high-temperature disc spring 4, a retaining ring 5 for a hole, a spring seat cushion 6, a packing 7, a packing gland 8, a packing Pressure plate 9, valve stem 10, hexagon socket head screw 11, transmission sleeve 12, transmission rod 13, set screw 14, valve stem retaining ring 15, stud 16, nut 17, lock washer 18, flexible graphite sealing ring 19, valve Block II 20;

The valve body 1 is an inverted "T" shape, the left end of which is the water inlet 111, and the right end is the water outlet 112, and the cavity of the valve body 1 from the water inlet 111 to the right end water outlet 112 is sequentially provided with retaining rings 5 for holes. , spring seat cushion 6, high-temperature disc spring 4, valve seat I3, ball 2, valve seat II20; the valve stem 10 is located in the middle of the valve body 1, and it passes through the packing pressure plate 9, the packing gland 8, and the packing 7, and is connected with The spheres 2 are connected; the packing plate 9 is connected to the valve body 1 through studs 16, nuts 17 and lock washers 18; The square key is connected with the transmission sleeve 12 and fastened by the set screw 14, and the valve stem 10 and the transmission sleeve 12 are provided with a valve stem retaining ring 15;

The valve stem 10 is connected to the sphere 2 in a concave-convex form, the sphere 2 is provided with a rectangular groove, and the valve stem 10 is provided with a rectangular bump;

The sphere 2 is a solid body with a circular flow channel in the middle, and the roughness of the outer surface in contact with the valve seat I3 and the valve seat II20 is above Ra0.8;

The compression stroke of the high-temperature disc spring 4 is greater than the expansion strokes of the ball 2, the valve seat I3 and the valve seat II20 at pressures below 63MPa and temperatures below 450°C.

The implementation process of a high-pressure drain ball valve is as follows:

The sealing between the ball 2 and the valve seat I3 and the valve seat II20 realizes the floating seal through the high-temperature disc spring 4, and because the ball is floating, under high pressure and high temperature conditions, the ball 2 and the valve seat I3 and the valve seat II20 The expansion will be more and more tight due to the compression of the high-temperature disc spring 4, which ensures the seal and will not damage the ball 2, valve seat I3 and valve seat II20; the contact surface roughness of the ball 2, valve seat I3 and valve seat II20 is Ra0 .8 level or above, the opening and closing process reduces jamming and further improves the service life of the valve.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Any modifications and equivalent replacements made within the spirit and principles of the present utility model are included in this utility model. within the scope of protection of utility models.

Claims (4)

1. A kind of 1. high pressure draining ball valve, it is characterised in that：It includes valve body（1）, spheroid（2）, valve seat I（3）, high temperature disc spring（4）、 Hole back-up ring（5）, spring seat cushion（6）, filler（7）, filler pressing sleeve（8）, hold-down grid（9）, valve rod（10）, soket head cap screw （11）, drive sleeve（12）, drive link（13）, holding screw（14）, valve rod back-up ring（15）, stud（16）, nut（17）, locking pad Circle（18）, flexible graphite sealing ring（19）, valve seat II（20）；

   The valve body（1）For inverted T-shape, its left end is water inlet（111）, right-hand member is delivery port（112）, from water inlet （111）To right-hand member delivery port（112）Valve body（1）Inside cavity is disposed with hole back-up ring（5）, spring seat cushion（6）, high temperature Disc spring（4）, valve seat I（3）, spheroid（2）, valve seat II（20）；The valve rod（10）Positioned at valve body（1）Middle part, it passes through filler pressure Plate（9）, filler pressing sleeve（8）, filler（7）, and and spheroid（2）It is connected；Hold-down grid（9）Pass through stud（16）, nut（17）, it is anti- Loose packing ring（18）It is connected to valve body（1）On；The drive sleeve（12）Pass through soket head cap screw（11）Installed in valve body（1）On, valve Bar（10）Upper end is provided with square button and drive sleeve（12）It is connected and passes through holding screw（14）Fastening, valve rod（10）With biography Dynamic set（12）It is provided with valve rod back-up ring（15）.
2. A kind of 2. high pressure draining ball valve according to claim 1, it is characterised in that：The valve rod（10）With spheroid（2）Phase Mode even is concave-convex form, spheroid（2）On be provided with rectangular recess, valve rod（10）On be provided with rectangular cam.
3. A kind of 3. high pressure draining ball valve according to claim 1, it is characterised in that：The spheroid（2）Circle is provided with for centre The solid of shape runner, itself and valve seat I（3）With valve seat II（20）The roughness of the outer surface of contact is in more than Ra0.8 ranks.
4. A kind of 4. high pressure draining ball valve according to claim 1, it is characterised in that：The high temperature disc spring（4）Compressed line Journey is more than spheroid（2）, valve seat I（3）With valve seat II（20）Expansion stroke below pressure 63MPa and below 450 °C of temperature.