CN219432503U

CN219432503U - High-frequency wear-resistant quick-cutting ball valve

Info

Publication number: CN219432503U
Application number: CN202320262980.7U
Authority: CN
Inventors: 尚海泉; 盛子烨
Original assignee: Wuxi Smart Auto Control Engineering Co Ltd
Current assignee: Wuxi Smart Auto Control Engineering Co Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-28
Anticipated expiration: 2033-02-20

Abstract

The utility model relates to a high-frequency wear-resistant quick-cutting ball valve. The utility model comprises a middle valve body, wherein a rotating cavity and a rotating hole communicated with the rotating cavity are respectively and penetratingly arranged in the middle valve body; the side valve body is connected to two sides of the middle valve body, and a medium flow passage cavity communicated with the rotating cavity is formed in the side valve body in a penetrating mode; the rotating assembly comprises a valve ball rotatably connected to the rotating cavity, and a valve rod and a driven shaft rotatably connected to the rotating hole and respectively connected with the upper end and the lower end of the valve ball, the medium runner cavity forms a fluid inlet channel and a fluid outlet channel at two sides of the valve ball, and the fluid inlet channel and the fluid outlet channel are respectively provided with a valve seat mounting hole at one side of the valve ball; the valve seat assembly arranged between the side valve body and the valve ball comprises a valve seat arranged in the valve seat mounting hole, and a sealing ring, a supporting ring, a spring and a first dustproof assembly which are arranged between the valve seat and the side valve body and are sequentially arranged along the direction away from the valve ball. The utility model can prevent the valve ball and the sealing surface of the valve seat from being damaged by pulling, and ensure the long-term stable operation of the ball valve.

Description

High-frequency wear-resistant quick-cutting ball valve

Technical Field

The utility model relates to the technical field of control valves, in particular to a high-frequency wear-resistant quick-cutting ball valve.

Background

The rapid development of new energy industries such as polysilicon, lithium batteries and photovoltaics leads to the increase of the demand of valves, and particularly, the ball valves with higher technical content requirements in the devices have strict control of production process, higher requirements on sealing performance and great manufacturing difficulty. The polysilicon is mostly manufactured by adopting an improved Siemens method, and the SiHCl3 purification, siCl4 cold hydrogenation and the recovery of silicon powder tail gas generated by a reduction furnace in the production process are all controlled by a control valve. In the production process of the polysilicon technology, the fluid medium contains silicon powder, nitrogen, hydrogen, chloride and the like, and the process temperature is controlled between 65 ℃ and 350 ℃. On one hand, silicon powder particles are tiny, and the silicon powder particles easily enter into the gap between the valve seat cavity and the bushing, so that the valve seat elastic element is blocked or the valve transmission shaft is blocked. On the other hand, the hardness of the silicon powder is very high and reaches HRC 56-65, along with the alternate change of the temperature of reactants, the silicon powder adheres to the surface of the valve ball to form crusts, the silicon powder deposited on the surface of the valve ball is difficult to clean through a conventional scraper, the medium contains chloride and has corrosiveness, the silicon powder is accumulated between the valve seat and the valve ball in the valve opening and closing process, the valve ball or the sealing surface of the valve seat is damaged by pulling, and finally the valve has the defects of blocking, internal leakage and the like. In addition, the silicon powder reversely-purged wear-resistant ball valve is rapid in switching-on and switching-off, the closing time is generally required to be less than 1 second, and frequent and rapid friction has high requirements on the hardness and wear resistance of the surfaces of the valve ball and the valve seat. In addition, the production process of the wear-resistant ball valve requires oil-forbidden and degreasing treatment and dust-free workshop assembly; the detection of the valve needs to be subjected to pressure test by nitrogen; the finished valve is required to be subjected to nitrogen-sealed vacuum packaging. The high-frequency wear-resistant quick-cutting ball valve on the current ten-thousand-ton high-purity silicon project is not limited by imported brands or domestic brands, and meanwhile, valve products meeting the technical requirements are scarce, and the service life of the valve is mostly not up to the requirement of the optimal overhaul period of the device. The silicon energy enterprises have to shorten the maintenance period and solve the safety risk caused by valve failure by timely maintaining or replacing new valves.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the wear-resistant, long-service-life and anti-blocking rapid cutting ball valve which is ingenious in structure and novel in design, is suitable for a polysilicon production device, can effectively prevent silicon powder from entering a valve seat cavity and a bushing gap, can prevent a valve seat elastic element from being blocked or a valve transmission shaft from being blocked, can simultaneously remove silicon powder attached to the surface of the valve ball, can prevent the valve ball and a valve seat sealing surface from being strained caused by silicon powder accumulation and crusting, and can ensure long-term stable operation of the ball valve.

According to the technical scheme provided by the utility model, the high-frequency wear-resistant quick-cutting ball valve comprises:

the middle valve body is respectively provided with a rotating cavity and a rotating hole communicated with the rotating cavity in a penetrating way;

the side valve body is connected to two sides of the middle valve body and is provided with a medium flow passage cavity communicated with the rotating cavity in a penetrating manner;

the rotating assembly comprises a valve ball, a valve rod and a driven shaft, wherein the valve ball is rotatably connected to the rotating cavity, the valve rod and the driven shaft are rotatably connected to the rotating hole and are respectively connected with the upper end and the lower end of the valve ball, the medium flow passage cavity forms a fluid inlet passage and a fluid outlet passage at two sides of the valve ball, and a valve seat mounting hole is respectively arranged at one side of the valve ball;

the valve seat assembly is arranged between the side valve body and the valve ball and comprises a valve seat arranged in the valve seat mounting hole, and a sealing ring, a supporting ring, a spring and a first dustproof assembly, wherein the sealing ring, the supporting ring, the spring and the first dustproof assembly are arranged between the valve seat and the side valve body and are sequentially arranged along the direction away from the valve ball.

In one embodiment of the utility model, the first dust assembly includes a first dust collar and a first metal collar.

In one embodiment of the utility model, the valve stem is connected to the valve ball by a cylindrical pin.

In one embodiment of the utility model, the valve rod is axially provided with a limit step, the middle valve body is connected with an upper cover propped against the upper end of the limit step, the valve rod is sleeved with a bushing, a belleville spring is arranged between the bushing and the lower end of the limit step, and a second dustproof assembly is arranged between the bushing and the middle valve body.

In one embodiment of the utility model, the second dust-proof assembly comprises a second dust-proof ring sleeved on the valve rod and a second metal retainer ring.

In one embodiment of the utility model, the surface of the valve ball and the sealing surface of the valve seat are treated with cemented carbide powder cladding and coated with a PVD coating.

In one embodiment of the utility model, the roughness of the valve ball surface and the valve seat sealing surface is 0.2-0.4 μm.

In one embodiment of the present utility model, the valve ball surface and valve seat sealing surface hardness is HV2800 to HV3500.

In one embodiment of the utility model, a metal winding gasket and a graphite composite gasket are arranged at the joint of the middle valve body and the side valve body.

In one embodiment of the utility model, the side valve body is provided with a blowing channel, the outer side end of the side valve body is provided with a blowing device communicated with one end of the blowing channel, the other end of the blowing channel extends to form a blowing hole communicated with the rotating cavity and the valve seat respectively, a sealing screw plug is arranged in the blowing hole, and the blowing device can be connected with high-pressure nitrogen in the opening and closing process of the valve and can blow silicon powder on the surface of the valve ball and in the valve seat.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

according to the utility model, the valve seats are arranged at the inlet channel and the outlet channel of the medium flow channel cavity of the ball valve, and the dust-proof ring and the 0.2mm ultrathin metal retainer ring are arranged, so that silicon powder particles are effectively restrained from entering the spring cavity of the valve seat, the spring is blocked, the valve seat is prevented from being incapable of realizing a piston effect, and the valve ball is prevented from being locked.

According to the utility model, after the valve ball surface and the valve seat sealing surface are subjected to Ni60+WC alloy powder cladding hardening treatment, PVD coating treatment is performed, so that the hardness of the valve ball surface and the valve seat sealing surface is improved to HV 2800-HV 3500, and the surface roughness is 0.2-0.4 mu m. On one hand, the problem of insufficient hardness of the surfaces of the valve ball and the valve seat is solved, the sealing surface is prevented from being scratched by silicon powder particles in the valve action process, on the other hand, the WC coating is not resistant to corrosion of chlorides, the PVD coating on the surfaces of the valve ball and the valve seat can be selected from TiNC or DLC coatings resistant to corrosion of chlorides, the PVD coating can improve the surface smoothness of the valve ball and the valve seat, friction and abrasion are reduced, and the service life of the valve is prolonged.

According to the utility model, the dust ring and the 0.2mm ultrathin metal check ring are arranged at the bottom of the lower bushing of the valve rod, so that silicon powder is prevented from entering a bushing gap, the valve rod is prevented from being blocked, and in addition, the metal check ring is more wear-resistant and has a good dust-proof effect compared with the dust ring.

According to the valve body provided by the utility model, the purging port is added, silicon powder deposited on the surface of the valve ball is purged in time through high-pressure nitrogen, and the problems of incrustation, action jam or jamming and the like caused by long-term deposition of the silicon powder on the surface of the valve ball are avoided.

The disc spring is arranged at the upper end of the bushing and used for compressing the dust ring at the lower end of the bushing, and real-time compensation is provided at the same time, so that silicon powder is prevented from entering a bushing gap after the dust ring is worn, and the valve rod is prevented from being blocked.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic view of the overall structure of the ball valve of the present utility model.

Fig. 2 is a schematic view of a partial enlarged structure at a in fig. 1.

Fig. 3 is a schematic view of a partial structure at B of fig. 1.

Fig. 4 is a schematic view of a partial structure at C in fig. 1.

Description of the specification reference numerals:

110. a fluid inlet channel; 120. a fluid outlet channel; 1. a middle valve body; 2. a side valve body; 21. a blowing channel; 3. a valve seat assembly; 3a, valve seat; 3b, a sealing ring; 3c, a supporting ring; 3d, a spring; 3e, a first dust ring; 3f, a first metal retainer ring; 4. a valve ball; 5. a valve stem; 51. a limit step; 6. a second dust ring; 7. a second metal retainer ring; 8. a bushing; 9. a belleville spring; 10. an upper cover; 11. a filler assembly; 12. a driven shaft; 13. a purge device; 14. a scraper; 15. a third dust ring; 16. and a third metal retainer ring.

Description of the embodiments

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

In the present utility model, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present utility model, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present utility model, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present utility model, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Referring to fig. 1 to 4, a high frequency wear resistant quick disconnect ball valve of the present utility model comprises:

the middle valve body 1 is respectively provided with a rotating cavity and a rotating hole communicated with the rotating cavity in a penetrating way;

the side valve bodies 2 are connected to two sides of the middle valve body 1, and the side valve bodies 2 are provided with medium flow passage cavities communicated with the rotating cavity in a penetrating manner;

the rotary assembly comprises a valve ball 4 rotatably connected to the rotary cavity, a valve rod 5 and a driven shaft 12 rotatably connected to the rotary hole and respectively connected with two ends of the valve ball 4, the medium flow passage cavity forms a fluid inlet channel 110 and a fluid outlet channel 120 at two sides of the valve ball 4, and the fluid inlet channel 110 and the fluid outlet channel 120 are respectively provided with a valve seat 3a mounting hole at one side of the valve ball 4;

the valve seat assembly 3 is arranged between the side valve body 2 and the valve ball 4, and the valve seat assembly 3 comprises a valve seat 3a arranged in a valve seat 3a mounting hole, a sealing ring 3b, a supporting ring 3c, a spring 3d and a first dust-proof assembly, wherein the sealing ring 3b, the supporting ring 3c, the spring 3d and the first dust-proof assembly are arranged between the valve seat 3a and the side valve body 2 in sequence along the direction away from the valve ball 4.

In this embodiment, the mounting hole of the valve seat 3a is a stepped hole, the first dust-proof component includes a first dust-proof ring 3e and a first metal retainer ring 3f, the first metal retainer rings 3f with the same specification are respectively mounted at two side ends of the first dust-proof ring 3e, and the thickness of the first metal retainer ring 3f is 0.2mm. In addition, a scraper 14 positioned on one side of the valve ball 4 is arranged on the valve seat 3a, so that silicon powder deposited on the surface of the valve ball 4 can be scraped in the opening and closing process of the valve.

A spring 3d mounting cavity for mounting a spring 3d is arranged between the valve seat 3a and the side valve body 2, so that the valve seat 3a has a floating piston effect, and the valve seat 3a is prevented from being blocked due to high-temperature expansion; the first dust-proof assembly can prevent silicon powder from entering the spring 3d installation cavity of the valve seat 3a and from blocking the spring 3d.

In this embodiment, the flanges in the side valve bodies 2 are connected to two sides of the middle valve body 1 through bolts to form a housing cavity for mounting a valve trim, the side valve bodies 2 mounted on two sides of the middle valve body 1 form a fluid inlet channel 110 and a fluid outlet channel 120, the upper end of the valve ball 4 is connected with the valve rod 5, the lower end is connected with the driven shaft 12 to form a fixed ball structure, the valve rod 5 passes through a rotating hole of the middle valve body, and the lower end is inserted into a ball handle of the valve ball 4; the valve seat 3a is arranged in the inner cavity of the side valve body 2 and arranged at two sides of the valve ball 4 and is symmetrical at 180 degrees and coaxially arranged, the valve seat 3a applies initial pretightening force through a spring 3d, and the valve seat 3a and the side valve body form a sealing structure through a graphite sealing ring 3b so as to meet the sealing requirement of the working condition at the maximum 350 ℃. By providing the first dust ring 3e and the first metal retainer ring 3f at the inlet passage and the outlet passage of the side valve body 2, the silicon powder is prevented from entering the spring 3d installation cavity of the valve seat 3 a. The packing system of the ball valve is double-layer packing, the upper part of the packing system is low in leakage, the upper end ring, the lower end ring and the middle flexible graphite ring of the packing system have an elastic compensation function, the lower layer of the packing system is a high-performance graphite ring, and the packing system can resist medium flushing and simultaneously play a role in primary sealing.

Specifically, the valve rod 5 is connected with the valve ball 4 through a cylindrical pin to form a valve transmission chain, so that the requirement of 100 ten thousand high-frequency switch actions can be met.

Specifically, the valve rod 5 is axially provided with a limiting step 51, the middle valve body 1 is connected with an upper cover 10 propped against the upper end of the limiting step 51 to prevent the valve rod 5 from being fleed, the valve rod 5 is sleeved with a bushing 8, a belleville spring 9 is arranged between the bushing 8 and the lower end of the limiting step 51, the limiting step 51 provides initial compression for the belleville spring 9, and a second dustproof assembly is arranged between the bushing 8 and the middle valve body 1. In this embodiment, second dustproof subassembly is including the second dust ring 6 and the second metal retaining ring 7 of cover locating valve rod 5, and second metal retaining ring 7 of the same specification is installed respectively to second dust ring 6 both sides end, second metal retaining ring 7's thickness is 0.2mm, can effectively prevent silica flour entering between bush 8 and the valve rod 5, avoids the valve jam, and the precompressed belleville spring 9 of bush 8 upper portion installation can provide real-time compensation for second dust ring 6 wearing and tearing, strengthens dustproof effect, avoids behind the high frequency action dust ring wearing and tearing inefficacy to cause silica flour to get into bush 8, causes the valve action jam.

Specifically, the surface of the valve ball 4 and the sealing surface of the valve seat 3a are coated with PVD plating layers, the thickness is 0.003mm, the roughness of the surface of the valve ball 4 and the sealing surface of the valve seat 3a is 0.2-0.4 mu m, and the hardness of the surface of the valve ball 4 and the sealing surface of the valve seat 3a is HV 2800-HV 3500.

According to the utility model, after the surface of the valve ball 4 and the sealing surface of the valve seat 3a are subjected to cladding hardening treatment by using Ni60+WC alloy powder, PVD coating treatment is performed, so that the hardness of the surface of the valve ball 4 and the sealing surface of the valve seat 3a is improved to HV 2800-HV 3500, and the surface roughness is 0.2-0.4 mu m. On one hand, the problem of insufficient surface hardness of the valve ball 4 and the valve seat 3a is solved, the sealing surface is prevented from being scratched by silicon powder particles in the valve action process, on the other hand, the WC coating is not resistant to corrosion of chloride, the PVD coating on the surfaces of the valve ball 4 and the valve seat 3a can be a TiNC or DLC coating which is resistant to corrosion of chloride, the PVD coating can improve the surface smoothness of the valve ball 4 and the valve seat 3a, friction and abrasion are reduced, and the service life of the valve is prolonged.

Specifically, the two sides of the middle valve body 1 are connected with the side valve body 2 through flange bolts, and a metal winding gasket and a graphite composite gasket are arranged at the joint of the middle valve body 1 and the side valve body 2, so that the valve is ensured to have no leakage risk by adopting a double redundant sealing structure.

Specifically, a third dust ring 15 and a third metal retainer ring 16 are further arranged between the driven shaft 12 and the valve ball 4.

Specifically, the side valve body 2 is equipped with the passageway of blowing 21, the outside end of side valve body 2 install with the blowing device 13 of passageway of blowing 21 one end intercommunication, the passageway of blowing 21 other end extends and forms respectively with the communicating hole of blowing of rotating chamber and disk seat 3a, set up sealed plug screw in the hole of blowing, the blowing device 13 can insert high-pressure nitrogen gas at the valve in-process of opening and close, and to the surface of valve ball 4 and the silica flour in the disk seat 3a purge the cleanness, can avoid silica flour to pile up valve ball 4 surface in a large number, cause valve action jam.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.

Claims

1. A high frequency wear resistant quick disconnect ball valve, comprising:

the middle valve body (1) is respectively provided with a rotating cavity and a rotating hole communicated with the rotating cavity in a penetrating way;

the side valve body (2), the said side valve body (2) connects to both sides of the middle valve body (1), the said side valve body (2) runs through and has medium runner cavity communicated with rotating cavity;

the rotary assembly comprises a valve ball (4) rotatably connected to the rotary cavity, a valve rod (5) and a driven shaft (12) rotatably connected to the rotary hole and respectively connected with the upper end and the lower end of the valve ball (4), the medium flow passage cavity forms a fluid inlet channel (110) and a fluid outlet channel (120) at two sides of the valve ball (4), and the fluid inlet channel (110) and the fluid outlet channel (120) are respectively provided with a valve seat (3 a) mounting hole at one side of the valve ball (4);

locate disk seat subassembly (3) between side valve body (2) and valve ball (4), disk seat subassembly (3) are including locating disk seat (3 a) in disk seat (3 a) mounting hole and be located between disk seat (3 a) and side valve body (2) and along sealing ring (3 b), support ring (3 c), spring (3 d) and the first dustproof subassembly that keep away from valve ball (4) direction and set gradually.

2. A high frequency wear resistant quick disconnect ball valve in accordance with claim 1 wherein said first dust assembly includes a first dust collar (3 e) and a first metal collar (3 f).

3. A high frequency wear resistant quick disconnect ball valve according to claim 1 wherein said valve stem (5) is connected to the valve ball (4) by a cylindrical pin.

4. The high-frequency wear-resistant quick-cutting ball valve according to claim 1, wherein the valve rod (5) is axially provided with a limit step (51), the middle valve body (1) is connected with an upper cover (10) propped against the upper end of the limit step (51), the valve rod (5) is sleeved with a bushing (8), a disc spring (9) is arranged between the bushing (8) and the lower end of the limit step (51), and a second dustproof assembly is arranged between the bushing (8) and the middle valve body (1).

5. The high-frequency wear-resistant quick-disconnect ball valve of claim 4 wherein said second dust assembly includes a second dust collar (6) and a second metal retainer ring (7) that are sleeved on the valve stem (5).

6. A high frequency wear resistant quick disconnect ball valve according to claim 1, wherein the surface of the valve ball (4) and the sealing surface of the valve seat (3 a) are cemented carbide powder clad and coated with PVD coating.

7. The high-frequency wear-resistant quick-cut-off ball valve according to claim 1, wherein the roughness of the sealing surface of the valve ball (4) and the valve seat (3 a) is 0.2-0.4 μm.

8. The high-frequency wear-resistant quick-cut-off ball valve according to claim 1, wherein the hardness of the sealing surfaces of the valve ball (4) and the valve seat (3 a) is HV 2800-HV 3500.

9. The high-frequency wear-resistant quick-cut-off ball valve according to claim 1, wherein a metal winding gasket and a graphite composite gasket are arranged at the joint of the middle valve body (1) and the side valve body (2).

10. The high-frequency wear-resistant quick-cutting ball valve according to claim 1, wherein the side valve body (2) is provided with a blowing channel (21), a blowing device (13) communicated with one end of the blowing channel (21) is installed at the outer side end of the side valve body (2), the other end of the blowing channel (21) extends to form blowing holes communicated with the rotating cavity and the valve seat (3 a) respectively, a sealing screw plug is arranged in the blowing holes, and the blowing device (13) can be connected with high-pressure nitrogen in the opening and closing process of the valve and can blow silicon powder on the surface of the valve ball (4) and in the valve seat (3 a).