CN211779108U

CN211779108U - High-pressure hard-sealing fixed ball valve

Info

Publication number: CN211779108U
Application number: CN202020438371.9U
Authority: CN
Inventors: 曹小红
Original assignee: Wenzhou Xusen Valve Co ltd
Current assignee: Wenzhou Xusen Valve Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-10-27
Anticipated expiration: 2030-03-31

Abstract

The utility model belongs to the technical field of valves, in particular to a high-pressure hard-sealing fixed ball valve, which comprises a bottom cover, a left body, a right body, a lower fixed shaft, a valve seat, a valve rod, a ball body, a valve body, a bearing, a filler and a turbine; the ball valve is characterized in that a left body and a right body are fixedly arranged on one side of the valve body through double-ended bolts and nuts, a bottom cover is arranged at the bottom of the valve body through inner hexagonal screws, a lower fixing shaft is arranged at the bottom of the valve body through an anti-static cylindrical pin and an anti-static spring, the ball body is arranged inside the valve body, the upper end of the lower fixing shaft is embedded into a shaft sleeve at the bottom of the ball body, and the lower fixing shaft is connected with the ball body through the anti-static. The utility model provides a prevent that sealing surface adhesive tape and high temperature card hinder's phenomenon, two formula high pressure fixed ball valves have adopted the elastic loading structure, have ensured the contact between the sealed face of spheroid and the disk seat is sealed under the normal closed condition, under the high temperature operating mode, can effectively compensate internals thermal expansion, avoid hindering because of the card that the height is turbid and lead to, are suitable for medium and small bore high temperature use occasion.

Description

High-pressure hard-sealing fixed ball valve

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to fixed ball valve of high pressure hard seal.

Background

The surface of a valve body of the hard sealing ball valve is manually cast steel by adopting an advanced spraying technology, the ball body and the valve seat are subjected to matched grinding by processing various working conditions and the sealing surface of the valve seat, and all sealing areas of the whole sealing surface of the ball valve are subjected to precision grinding. It is suitable for high-temp. and high-pressure water, steam, petroleum, coal, fibre, thick and corrosive medium and medium with particles. The metal sealing ball valve has two structures of floating ball and fixed ball, and the metal valve seat ring contacts with the spherical surface and is sealed with the spherical surface by the uniform spring load acting on the valve seat ring.

The contact between the sealing surface of the ball body and the sealing of the valve seat, under the high-temperature working condition, the internal part is heated and expanded, and the blockage is caused by high turbidity; the phenomena of sticking and high-temperature blocking of the sealing surface are prevented.

The medium can pile up in the clearance between valve body and the valve ball in a large number, causes the medium to pile up the coking, and frictional force increases for valve moment of torsion grow, valve locking even causes the valve difficult to open, can cause the damage simultaneously, leads to life weak point at last.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a fixed ball valve of high pressure hard seal has solved the phenomenon that prevents sealing surface adhesive tape and high temperature card and hinder, and two formula high pressure fixed ball valves have adopted the elastic loading structure, have ensured the contact between the sealed face of spheroid and the disk seat seal under the normal closed condition, under the high temperature operating mode, can effectively compensate internals thermal expansion, avoid hindering because of the card that the height is turbid and lead to, are suitable for medium and small bore high temperature use occasion.

In order to achieve the above object, the utility model provides a following technical scheme: a high-pressure hard-seal fixed ball valve comprises a bottom cover, a left body, a right body, a lower fixed shaft, a valve seat, a shaft sleeve, a valve rod, a ball body, a valve body, a bearing, a filler, a support and a turbine; a left body and a right body are fixedly arranged on one side of the valve body through double-headed bolts and nuts, a bottom cover is arranged at the bottom of the valve body through inner hexagonal bolts, a lower fixing shaft is arranged at the bottom in the valve body through an anti-static cylindrical pin and an anti-static spring, the ball body is arranged in the valve body, the upper end of the lower fixing shaft is embedded into a shaft sleeve at the bottom of the ball body and is matched and connected with the ball body through the anti-static cylindrical pin and the anti-static spring, a valve rod is connected and arranged at the top of the ball body, the upper end of the valve rod penetrates through a bearing arranged in the valve body and extends to the outside of the valve body, a sealing sleeve ring is arranged in the upper end of the valve body through the inner hexagonal bolts; the top of the valve body is also fixedly provided with a bracket through a fastening bolt and a nut; the support is provided with a turbine through a hexagon bolt, and the top end of the valve rod is connected with the turbine through a flat key.

Preferably, the valve body and the upper and lower parts of the inner parts of the left body and the right body are provided with valve seats, the valve seats are fixedly provided with valve seat supporting rings, the inner walls of the valve body and the left body and the right body are provided with springs close to the valve seat supporting rings, and valve seat sealing rings are arranged between the valve seats and the valve body and between the valve seats and the left body and between the valve seats and the.

Preferably, the bottom cover, the left body, the right body and the joint of the sealing ferrule and the valve body are all provided with winding gaskets.

Preferably, a hexagonal plug and a plug pad are installed at the side bottom of the valve body.

Preferably, graphite packing sealing rings are arranged at the joints of the lower fixed shaft, the left body, the right body, the sealing ring and the valve body.

Preferably, the valve seat is made of hard materials or hard materials subjected to local surfacing; the surface of the ball body is hardened.

Preferably, the filler is composed of a mixed layer of flexible graphite and metal wires, a mica layer, a flexible graphite layer, a composite fiber braided layer and a ceramic fiber braided layer.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model solves the problems of sticking and high temperature blocking on the sealing surface, the two-piece high-pressure fixed ball valve adopts an elastic loading structure, ensures the contact between the sealing surface of the ball body and the sealing of the valve seat under the normal closing condition, can effectively compensate the thermal expansion of the internal parts under the high temperature working condition, avoids the blocking caused by high turbidity, and is suitable for the high temperature use occasions with medium and small calibers;

2. the utility model discloses outside each item performance index with ordinary ball valve, still possessed high temperature resistant, antifriction and double-flow entry, export self sealss function, wherein two block types have still been equipped with both sides export sealed, have been adjusted the disk seat by stainless steel spring, make the moment of torsion of valve more balanced, the valve is under the condition of high frequency, high temperature difference, high pressure difference, switching performance is stable.

3. The surface of the ball body is subjected to surface hardening treatment, and the valve seat is integrally made of hard materials or partially made of hard materials through surfacing, so that a proper hardness difference is ensured between the sealing rings, and the ball is suitable for solid particles and abrasive media; because the aspect of sealing packing adopts flexible graphite and a metal winding type gasket, the sealing packing can be used in high-temperature and high-pressure working conditions and has the function of fire resistance.

4. Install the disk seat in the fixed ball valve of high pressure hard seal, fixed mounting is provided with the disk seat backup ring on the disk seat, the valve body with control on the internal wall near disk seat backup ring department install the spring, disk seat and valve body with control and be provided with the disk seat sealing ring between the body, can effectually alleviate the impact force that receives through the spring, and can protect through the disk seat backup ring and can not receive the damage, and the effort of disk seat and spheroid when the ball valve is opened is little, disk seat position seal structure that sealing performance is excellent, it does not have the jam to ensure disk seat position spring, it is sealed good, the problem that the hard seal ball valve is not wear-resisting is solved, make disk seat seal face and the difficult wearing and tearing of valve ball, the reliable operation, long service life, use and easy maintenance's hard.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of a high-pressure hard-seal fixed ball valve of the present invention;

fig. 2 is the utility model relates to an inside schematic structure of fixed ball valve of high pressure hard seal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Example 1

Referring to fig. 1-2, the present invention provides the following technical solutions: a high-pressure hard seal fixed ball valve comprises a bottom cover 2, a left body 6, a right body 6, a lower fixed shaft 11, a valve seat 18, a shaft sleeve 19, a valve rod 22, a ball body 23, a valve body 24, a bearing 25, a packing 28, a support 39 and a turbine 43; a left body 6 and a right body 6 are fixedly arranged on one side of the valve body 24 through a stud bolt 8 and a nut 7, a bottom cover 2 is arranged at the bottom of the valve body 24 through an inner hexagon screw 1, a lower fixing shaft 11 is arranged at the bottom in the valve body 24 through an anti-static cylindrical pin 5 and an anti-static spring 4, a ball body 23 is arranged in the valve body 24, the upper end of the lower fixing shaft 11 is embedded in a shaft sleeve 19 at the bottom of the ball body 23, and is matched and connected with a ball body 23 through an anti-static cylindrical pin 5 and an anti-static spring 4, the top of the ball body 23 is connected with a valve rod 22, the upper end of the valve rod 22 passes through a bearing 25 arranged in the valve body 24 and extends to the outside of the valve body 24, a sealing ring 38 is arranged in the upper end of the valve body 24 through an inner hexagon screw 1, the packing 28 is filled on the sealing ferrule 38, the packing pressing sleeve 29 is arranged above the packing 28, and the packing pressing plate 30 is fixedly arranged at the top of the valve body 24 through the stud 8 and the nut 7; a bracket 39 is fixedly arranged on the top of the valve body 24 through a fastening bolt 32 and a nut 7; a worm wheel 43 is mounted on the bracket 39 through a hexagon bolt 40, and the top end of the valve rod 22 is connected with the worm wheel 43 through a flat key 42.

Specifically, the valve body 24 and the upper and lower parts of the inside of the left and right bodies 6 are provided with the valve seats 18, the valve seats 18 are fixedly provided with the valve seat supporting rings 17, the inner walls of the valve body 24 and the left and right bodies 6 are provided with the springs 15 near the valve seat supporting rings 17, and the valve seat sealing rings 16 are arranged between the valve seats 18 and the valve body 24 as well as between the valve seats 18 and the left and right bodies 6; the structure of the spring 15 which is elastically loaded is adopted, the impact force can be effectively relieved through the spring 15, the valve seat supporting ring 17 can protect the valve seat from being damaged, the acting force of the valve seat 18 and the ball 23 when the ball valve is opened is small, the sealing structure of the valve seat 18 part with excellent sealing performance can ensure that the spring at the valve seat 18 part is not blocked and the sealing is good, the problem that the hard sealing ball valve is not wear-resistant is solved, the sealing surface of the valve seat 18 and the valve ball are not easy to wear, the work is reliable, the service life is long, the hard sealing ball valve is convenient to use and maintain, and the high temperature and high pressure resistance and the; the contact between the sealing surface of the ball 23 and the sealing of the valve seat 18 is ensured under the normal closing condition, the thermal expansion of the internal part can be effectively compensated under the high-temperature working condition, the blockage caused by high turbidity is avoided, and the valve is suitable for middle and small-caliber high-temperature use occasions.

Specifically, the bottom cover 2, the left and right bodies 6 and the joints of the sealing collar 38 and the valve body 24 are all provided with winding pads 3.

Specifically, a hexagonal plug 13 and a plug pad 14 are installed at the side bottom of the valve body 24.

Specifically, graphite packing sealing rings 10 are arranged at the joints of the lower fixed shaft 11, the left body 6, the right body 6, the sealing ring 38 and the valve body 24.

Specifically, the valve seat 18 is made of a hard material or a hard material formed by local surfacing; the surface of the sphere 23 is hardened; the surface of the ball 23 is hardened, the valve seat 18 is wholly made of hard materials or made of hard materials through local surfacing, and proper hardness difference between sealing rings is ensured, so that the ball is suitable for solid particles and abrasive media; because flexible graphite and a metal winding type gasket are adopted in the aspect of sealing packing, the gasket can be used in high-temperature and high-pressure working conditions and has a fire-resistant function;

(1) the hardness of the ball surface surfacing hard alloy can reach over 40HRC, the ball surface surfacing hard alloy has complex process and low production efficiency, the large-area surfacing is easy to deform parts, and the current ball surface surfacing process is less in use.

(2) The hard chromium plating on the surface of the sphere has the hardness of 60-65 HRC and the thickness of 0.07-0.10 mm, the chromium plating has high hardness, is wear-resistant and corrosion-resistant, can keep the surface bright for a long time, and has relatively simple process and lower cost. However, the hardness of the hard chrome plating layer is rapidly reduced due to the release of internal stress when the temperature is increased, and the working temperature of the hard chrome plating layer cannot be higher than 427 ℃. In addition, the binding force of the chromium coating is low, and the coating is easy to fall off.

(3) The surface of the sphere is nitrided by plasma, the surface hardness can reach 60-65 HRC, the thickness of a nitrided layer is 0.20-0.40 mm, and the plasma nitriding treatment hardening process cannot be used in the fields of chemical strong corrosion and the like due to poor corrosion resistance after high-temperature nitriding reaction.

(4) The supersonic spraying (HVOF) process for the surface of the sphere has the highest hardness of 70-75 HRC, high collective strength and 0.25-0.4 mm thickness, and the supersonic spraying is also one of the main process means for hardening the surface of the sphere. High viscosity fluids in the fields of thermal power plants, petrochemical systems, and coal chemical industry; the hardening process is mostly used in mixed fluid and highly corrosive fluid media with dust and solid particles.

(5) The plasma spray welding process for the surface of the sphere has the highest hardness of 55-65 HRC (NI55, NI60 and NI65), high integrated strength and 0.40-0.5 mm thickness, and is the most main process means for hardening the surface of the sphere. Spray welding is a process for the thermal spraying treatment of the surface of a metal material. The method comprises heating powder (metal powder, alloy powder, or ceramic powder) to melt or high plasticity by heat source, spraying with air flow, and depositing on the surface of the workpiece to form a coating (welding) layer firmly bonded with the surface (substrate).

Specifically, the filler 28 is composed of a mixed layer of flexible graphite and metal wires, a mica layer, a flexible graphite layer, a composite fiber woven layer, and a ceramic fiber woven layer.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a fixed ball valve of high pressure hard seal which characterized in that: the device comprises a bottom cover (2), a left body, a right body (6), a lower fixed shaft (11), a valve seat (18), a shaft sleeve (19), a valve rod (22), a ball body (23), a valve body (24), a bearing (25), a filler (28), a support (39) and a turbine (43); a left body and a right body (6) are fixedly arranged on one side of the valve body (24) through a stud bolt (8) and a nut (7), a bottom cover (2) is arranged at the bottom of the valve body (24) through an inner hexagon screw (1), a lower fixing shaft (11) is arranged at the inner bottom of the valve body (24) through an anti-static cylindrical pin (5) and an anti-static spring (4), a ball body (23) is arranged inside the valve body (24), the upper end of the lower fixing shaft (11) is embedded into a shaft sleeve (19) at the bottom of the ball body (23), the lower fixing shaft is matched and connected with the ball body (23) through the anti-static cylindrical pin (5) and the anti-static spring (4), a valve rod (22) is connected to the top of the ball body (23), the upper end of the valve rod (22) penetrates through a bearing (25) arranged inside the valve body (24) and extends to the outside of the valve body, the packing (28) is filled on the sealing ferrule (38), the packing pressing sleeve (29) is arranged above the packing (28), and the packing pressing plate (30) is fixedly arranged at the top of the valve body (24) through a stud bolt (8) and a nut (7); a bracket (39) is fixedly arranged on the top of the valve body (24) through a fastening bolt (32) and a nut (7); a turbine (43) is installed on the support (39) through a hexagon bolt (40), and the top end of the valve rod (22) is connected with the turbine (43) through a flat key (42).

2. A high pressure, hard seal, stationary ball valve according to claim 1, wherein: the valve seat (18) is installed on the upper and lower sides of the interior of the valve body (24) and the left and right bodies (6), the valve seat supporting ring (17) is fixedly installed on the valve seat (18), the spring (15) is installed on the inner walls of the valve body (24) and the left and right bodies (6) and is close to the valve seat supporting ring (17), and the valve seat sealing ring (16) is arranged between the valve seat (18) and the valve body (24) and between the left and right bodies (6).

3. A high pressure, hard seal, stationary ball valve according to claim 1, wherein: and winding pads (3) are arranged at the joints of the bottom cover (2), the left and right bodies (6), the sealing ferrule (38) and the valve body (24).

4. A high pressure, hard seal, stationary ball valve according to claim 1, wherein: the side bottom of the valve body (24) is provided with a hexagonal plug screw (13) and a plug screw pad (14).

5. A high pressure, hard seal, stationary ball valve according to claim 1, wherein: and graphite packing sealing rings (10) are arranged at the joints of the lower fixed shaft (11), the left and right bodies (6), the sealing ring (38) and the valve body (24).

6. A high pressure, hard seal, stationary ball valve according to claim 1, wherein: the valve seat (18) is made of hard materials or hard materials formed by local surfacing.

7. A high pressure, hard seal, stationary ball valve according to claim 1, wherein: the filler (28) is composed of a mixed layer of flexible graphite and metal wires, a mica layer, a flexible graphite layer, a composite fiber braided layer and a ceramic fiber braided layer.