阅读说明：本技术 一种超低温超高压上装式自密封球阀 (Ultra-low temperature superhigh pressure upper assembling type self-sealing ball valve ) 是由 章文忠 韩龙生 何俊 彭成武 庞媛 李超 邓科 于 2020-07-31 设计创作，主要内容包括：本发明涉及一种超低温超高压上装式自密封球阀,阀体(1)内部装有阀座组合件(2),阀座组合件(2)密封住球体(27)和阀体(1)之间的空间；球体盖(19)下部有一球面结构,与第一密封圈(26)、第二密封圈(25)紧密贴合,实现密封作用；第二密封圈(25)由一四开环(24)限位,四开环(24)由挡块(23)限位,挡块(23)上方装有第二唇形密封圈(22),第二唇形密封圈(22)紧配于阀体(1)和球体盖(19)之间,封住球体盖(19)外侧和阀体(1)中道内侧空间,该结构能有效解决超低温超高压球阀中道难以密封的问题,随着内部压力增高,密封力也相应增大,密封性能优异；避免螺栓拧不均匀而引起的危险,减小球阀中道的面积,减轻了重量,降低了成本。(The invention relates to an ultra-low temperature and ultra-high pressure top-mounted self-sealing ball valve, wherein a valve seat assembly (2) is arranged in a valve body (1), and the valve seat assembly (2) seals a space between a ball body (27) and the valve body (1); the lower part of the spherical cover (19) is provided with a spherical structure which is tightly attached with the first sealing ring (26) and the second sealing ring (25) to realize the sealing function; the second sealing ring (25) is limited by a four-open ring (24), the four-open ring (24) is limited by a stop block (23), a second lip-shaped sealing ring (22) is arranged above the stop block (23), the second lip-shaped sealing ring (22) is tightly matched between the valve body (1) and the ball cover (19) to seal the outer side of the ball cover (19) and the inner space of the middle channel of the valve body (1), the structure can effectively solve the problem that the middle channel of the ultra-low-temperature ultra-high pressure ball valve is difficult to seal, the sealing force is correspondingly increased along with the increase of the internal pressure, and the sealing performance is excellent; the danger caused by uneven bolt screwing is avoided, the area of a middle channel of the ball valve is reduced, the weight is lightened, and the cost is reduced.)

1. The utility model provides an ultra-low temperature superhigh pressure upper assembling self sealss ball valve, includes valve body (1), valve gap (3), gland (13), support (14), executor (15), valve rod (17), first sealing washer (26), second sealing washer (25) and spheroid (27), its characterized in that: the valve seat assembly (2) is arranged in the valve body (1), and the valve seat assembly (2) seals the space between the ball body (27) and the valve body (1); a ball cover (19) is arranged above the ball (27), and a self-lubricating bearing (28) is arranged between the ball (27) and the ball cover (19); the lower part of the spherical cover (19) is provided with a spherical structure which is tightly attached with the first sealing ring (26) and the second sealing ring (25); the second sealing ring (25) is limited by a four-open ring (24), and the four-open ring (24) is limited by a stop block (23); a second lip-shaped sealing ring (22) is arranged above the stop block (23), and the second lip-shaped sealing ring (22) is tightly matched between the valve body (1) and the ball cover (19); be equipped with self-lubricating bearing (20) between spheroid lid (19) and valve rod (17), in valve rod (17) lower extreme inserted spheroid (27), valve rod (17) upper segment cooperatees with uide bushing (9), first lip sealing washer (10), packing gasket (11), graphite packing (12) in valve gap (3) sealing box to pass gland (13), support (14), be connected with executor (15).

2. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 1, wherein: the spherical surface of the lower part of the spherical cover (19) is tightly attached to the first sealing ring (26), the second sealing ring (25) is arranged above the first sealing ring (26), and the spherical surface of the second sealing ring (25) is attached to the spherical surface of the spherical cover (19).

3. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 1, wherein: the four open rings (24) are arranged in the groove of the valve body (1).

4. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 1, wherein: the stop block (23) is arranged at the upper end of the four-open ring (24).

5. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 1, wherein: and an anti-abrasion pad (21) is arranged at the anti-flying step position at the lower part of the valve rod (17).

6. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 5, wherein: and an electrostatic spring (16) is arranged at the contact end of the valve rod (17) and the slotted hole of the ball body (27).

7. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 1, wherein: the valve body (1) is connected with the valve cover (3) through a first nut (4) and a first full-thread stud (5).

8. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 1, wherein: the valve cover (3) and the spherical cover (19) are fixedly connected through a second nut (6) and a second full-thread stud (7).

9. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 8, wherein: a metal winding pad (18) is arranged between the valve cover (3) and the ball cover (19).

10. The ultra-low temperature ultra-high pressure top-loading self-sealing ball valve of claim 9, wherein: and a drip plate (8) is arranged at the middle section of the valve cover (3).

Technical Field

The invention relates to a ball valve, in particular to an ultralow-temperature ultrahigh-pressure upper-assembling type self-sealing ball valve.

Background

The upper-mounted ball valve is widely applied, and is simple and rapid to disassemble on a pipeline and convenient and rapid to maintain. When the valve breaks down on the pipeline and needs to be repaired, the valve does not need to be disassembled from the pipeline, only the middle flange bolt and the nut need to be disassembled, the valve cover and the valve rod assembly are taken out of the valve body together, and then the ball body and the valve seat assembly are taken out. The ball body and the valve seat can be repaired on line, and time is saved.

The utility model discloses a chinese utility model patent that bulletin number is CN209909221U provides a ball valve, it includes actuating mechanism, a valve body, the spheroid, the disk seat, the valve rod, valve rod guide pin subassembly, the valve bonnet, a support, the valve body lower part is provided with inlet and outlet channel, inlet and outlet channel middle part is the cavity, the spheroid sets up in the cavity of valve body, spheroid bottom and valve body cavity lower part hinged joint, the spheroid top passes through the spheroid guide pin with the valve rod and is connected, the disk seat sets up at valve body cavity inner wall, the movably contact disk seat in spheroid one side, the support passes through bolt A fixed connection with the valve body, the valve bonnet sinks inside on the valve body, the valve body adopts pressure self sealedly structure with being connected of valve bonnet down, this ball valve, its valve body and valve bonnet adopt pressure.

The valve cover of the ball valve body is generally connected through bolts, and a middle bolt provides pre-tightening force required by sealing and resists medium force generated by a middle channel. In an ultra-low temperature and ultra-high pressure environment, the design requirement is difficult to meet only by bolt pre-tightening, particularly when the design pressure reaches 1500LB and above, the liquid medium in the middle cavity of the ultra-low temperature ball valve is possible to be gasified, the pressure after gasification is higher, and hidden troubles exist in single bolt pre-tightening.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the ultra-low temperature and ultra-high pressure top-mounted self-sealing ball valve, most of medium pressure of the middle cavity acts on the ball cover, so that the ball cover is tightly attached to the first sealing ring and the second sealing ring, the self-sealing effect is realized, medium force is borne by the four open rings and finally acts on the valve body, and the middle way sealing problem of the top-mounted ball valve in the ultra-low temperature and ultra-high pressure environment is effectively solved. The upper-mounted ball valve can be used in an ultra-low temperature and ultra-high pressure environment, the design pressure reaches more than 1500LB, and the design temperature is as low as-196 ℃.

In order to achieve the above object, the present invention adopts the following technical solutions.

The invention provides an ultralow-temperature ultrahigh-pressure upper-mounted self-sealing ball valve which comprises a valve body, a valve cover, a packing gland, a support, an actuator, a valve rod, a first sealing ring, a second sealing ring and a ball body, wherein the valve cover is arranged on the valve body; the valve body is internally provided with a valve seat assembly which seals the space between the ball body and the valve body; a ball cover is arranged above the ball body, and a self-lubricating bearing is arranged between the ball body and the ball cover; the lower part of the spherical cover is provided with a spherical structure which is tightly attached to the first sealing ring and the second sealing ring; the second sealing ring is limited by a four-open ring, and the four-open ring is limited by a stop block; a second lip-shaped sealing ring is arranged above the stop block and is tightly matched between the valve body and the ball cover; a self-lubricating bearing is arranged between the ball body cover and the valve rod, the lower end of the valve rod is inserted into the ball body, and the upper section of the valve rod is matched with a guide sleeve, a first lip-shaped sealing ring, a packing gasket and graphite packing in a valve cover sealing box, penetrates through the packing gland and the support and is connected with an actuator.

Preferably, the spherical surface of the lower part of the spherical cover is tightly attached to the first sealing ring, the second sealing ring is arranged above the first sealing ring, and the spherical surface of the second sealing ring is attached to the spherical surface of the spherical cover.

In any of the above technical solutions, preferably, the four-open ring is installed in the valve body groove.

In any of the above technical solutions, preferably, the stopper is mounted at an upper end of the four open rings.

In any of the above technical solutions, preferably, an anti-wear pad is disposed at the anti-flying step at the lower portion of the valve rod.

In any of the above technical solutions, preferably, an electrostatic spring is disposed at a contact end of the valve rod and the ball slot.

In any one of the above technical solutions, preferably, the valve body is connected with the valve cover through a first nut and a first full-thread stud.

In any of the above technical solutions, preferably, the valve cover and the ball cover are fixedly connected by a second nut and a second full-thread stud.

In any of the above technical solutions, preferably, a metal winding pad is disposed between the valve cover and the ball cover.

In any of the above technical solutions, preferably, a drip tray is disposed at the middle section of the valve cover.

In the invention, the lower part of the ball cover is provided with a spherical structure which is tightly attached with the first sealing ring and the second sealing ring to realize the sealing function. The four-open ring is arranged in the groove of the valve body to limit the second sealing ring. The stop block is arranged at the upper end of the four-open ring to limit the four-open ring. The second lip-shaped sealing ring is tightly matched with the valve body and the ball cover to seal the space between the outer side of the ball cover and the inner side of the middle channel of the valve body.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

according to the ultralow-temperature ultrahigh-pressure upper-mounting type self-sealing ball valve provided by the invention, most of medium pressure of the middle cavity acts on the ball cover, so that the ball cover is tightly attached to the first sealing ring and the second sealing ring, self-sealing effect is realized, medium force is borne by the four open rings and finally acts on the valve body, and the condition that a middle bolt is difficult to seal under ultralow-temperature ultrahigh pressure is avoided.

The ultralow-temperature ultrahigh-pressure upper-mounting type self-sealing ball valve provided by the invention effectively solves the problem that the middle channel of the ultralow-temperature ultrahigh-pressure ball valve is difficult to seal, and the sealing force is correspondingly increased along with the increase of the internal pressure, so that the sealing performance is excellent. The danger caused by uneven bolt screwing is avoided, the area of the middle channel of the ball valve is reduced, the weight is lightened, and the cost is reduced.

The ultra-low temperature and ultra-high pressure upper-mounted self-sealing ball valve provided by the invention can be used in an ultra-low temperature and ultra-high pressure environment, the design pressure reaches more than 1500LB, and the design temperature is as low as-196 ℃.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and 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 these drawings without creative efforts.

FIG. 1 is a schematic structural view of a preferred embodiment of an ultra-low temperature ultra-high pressure top-loading self-sealing ball valve according to the present invention;

fig. 2 is a schematic view of the middle seal structure of the embodiment shown in fig. 1 of the ultra-low temperature ultra-high pressure top-loading type self-sealing ball valve according to the present invention.

Reference numerals: 1. the valve comprises a valve body, a valve seat assembly, a valve cover, a valve body, a first nut, a second nut, a valve seat assembly, a valve cover, a first full-thread stud, a first nut, a second full-thread stud, a drip plate, a guide sleeve, a first lip-shaped sealing ring, a second lip-shaped sealing ring, a graphite packing, a packing gland, a first lip-shaped sealing ring, a second lip-shaped sealing ring, a stop block, a self-lubricating bearing, a.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to overcome the technical problems that when the design pressure of the upper-mounted self-sealing ball valve reaches 1500LB and above in an ultra-low temperature and ultra-high pressure environment, a liquid medium in a middle cavity of the ultra-low temperature ball valve is likely to be gasified, the pressure is higher after the gasification, hidden dangers exist due to the fact that the upper-mounted self-sealing ball valve is pre-tightened by a bolt alone, and the like, the embodiment of the invention provides the upper-mounted self-sealing ball valve for the ultra-low temperature and ultra-high pressure environment, and the middle way sealing problem.

The structure, characteristics and implementation form of the ultralow temperature ultrahigh pressure top-mounted self-sealing ball valve of the present embodiment are described below with reference to fig. 1 and 2.

The super low temperature superhigh pressure facial make-up formula self sealss ball valve described in this embodiment, including valve body 1, valve gap 3, gland 13, support 14, executor 15, valve rod 17, first sealing washer 26, second sealing washer 25 and spheroid 27, valve seat sub-assembly 2 is equipped with to valve body 1 inside.

In the ultra-low temperature and ultra-high pressure top-mounted self-sealing ball valve of the present embodiment, the valve seat assembly 2 seals the space between the ball body 27 and the valve body 1.

The super low temperature superhigh pressure upper assembling self sealss ball valve of this embodiment is equipped with spheroid lid 19 above spheroid 27, is equipped with self-lubricating bearing 28 between spheroid 27 and the spheroid lid 19. The spherical surface of the lower part of the sphere cover 19 is tightly attached with the first sealing ring 26, the second sealing ring 25 is arranged above the first sealing ring 26, and the spherical surface of the second sealing ring 25 is attached with the spherical surface of the sphere cover 19. The lower part of the sphere cover 19 is provided with a spherical structure which is tightly attached with the first sealing ring 26 and the second sealing ring 25 to realize the sealing function.

The super low temperature superhigh pressure facial make-up formula self sealss ball valve of this embodiment, second sealing washer 25 is spacing by a four-open ring 24, and four-open ring 24 adorns in 1 recess of valve body. The stop block 23 is arranged at the upper end of the four-open ring 24, the four-open ring 24 is limited by the stop block 23, the second lip-shaped sealing ring 22 is arranged above the stop block 23, and the second lip-shaped sealing ring 22 is tightly matched between the valve body 1 and the ball cover 19.

The super-low temperature superhigh pressure upper assembling type self-sealing ball valve of this embodiment is equipped with self-lubricating bearing 20 between spheroid lid 19 and the valve rod 17, and in the valve rod 17 lower extreme inserted spheroid 27, the uide bushing 9, first lip seal 10, packing gasket 11, graphite packing 12 in valve rod 17 upper segment and the sealed letter of valve gap 3 matched with to pass gland 13, support 14, be connected with executor 15.

The super low temperature superhigh pressure upper assembling self sealss ball valve of this embodiment, the step department of preventing flying is equipped with antifriction pad 21 in valve rod 17 lower part.

In the ultra-low temperature and ultra-high pressure top-mounted self-sealing ball valve of the embodiment, the contact end of the valve rod 17 and the groove hole of the ball body 27 is provided with the electrostatic spring 16.

The super low temperature superhigh pressure upper assembling self sealss ball valve of this embodiment, valve body 1 is connected through first nut 4 and first full line double-screw bolt 5 with valve gap 3.

The super low temperature superhigh pressure upper assembling self sealss ball valve of this embodiment, valve gap 3 is connected fixedly through second nut 6 and second full line double-screw bolt 7 with spheroid lid 19.

The super-low temperature superhigh pressure upper assembling type self-sealing ball valve of this embodiment is equipped with metal winding pad 18 between valve gap 3 and spheroid lid 19.

The super low temperature superhigh pressure upper assembling self sealss ball valve of this embodiment, 3 middle sections of valve gap are provided with drip tray 8.

According to the ultralow-temperature ultrahigh-pressure upper-mounting type self-sealing ball valve, the lower part of the ball cover is provided with a spherical structure which is tightly attached to the first sealing ring and the second sealing ring, so that a sealing effect is realized; the four-open ring is arranged in the groove of the valve body to limit the second sealing ring; the stop block is arranged at the upper end of the four-open ring to limit the four-open ring. The second lip-shaped sealing ring is tightly matched with the valve body and the ball cover to seal the space between the outer side of the ball cover and the inner side of the middle channel of the valve body. The most part of medium pressure of the middle cavity acts on the ball cover, so that the ball cover is tightly attached to the first sealing ring and the second sealing ring, self-sealing effect is realized, medium force is borne by the four open rings and finally acts on the valve body, and the condition that the middle bolt is difficult to meet sealing under ultralow temperature and ultrahigh pressure is avoided. The problem that the middle way of the ultralow-temperature ultrahigh-pressure ball valve is difficult to seal is effectively solved, and along with the increase of the internal pressure, the sealing force is correspondingly increased, so that the sealing performance is excellent. The danger caused by uneven bolt screwing is avoided, the area of the middle channel of the ball valve is reduced, the weight is lightened, and the cost is reduced.

In specific implementation, as shown in fig. 1 and 2, the ultra-low temperature and ultra-high pressure top-mounted self-sealing ball valve mainly comprises a valve body 1, a valve seat assembly 2 is mounted inside the valve body 1, the valve seat assembly 2 seals a space between a ball 27 and the valve body 1, a ball cover 19 is arranged above the ball 27, a self-lubricating bearing 20 is arranged between the ball 27 and the ball cover 19, a lower spherical surface of the ball cover 19 is tightly attached to a first sealing ring 26, a second sealing ring 25 is arranged above the first sealing ring 26, a spherical surface of the second sealing ring 25 is attached to a spherical surface of the ball cover 19, the second sealing ring 25 is limited by a four-open ring 24, the four-open ring 24 is mounted in a groove of the valve body 1, the four-open ring 24 is limited by a stopper 23, a second lip-shaped sealing ring 22 is mounted above the stopper 23, the second lip-shaped sealing ring 22 is tightly fitted between the valve body 1 and the ball, a metal winding pad 18 is arranged between the valve cover 3 and the ball cover 19, a self-lubricating bearing 20 is arranged between the ball cover 19 and the valve rod 1, the lower end of the valve rod 17 is inserted into the ball 27, and the upper section of the valve rod 17 is matched with the first lip-shaped sealing ring 10 and the graphite packing 12 in the sealing box of the valve cover 3, penetrates through the packing gland 13 and the support 14 and is connected with the actuator 15.

The ultralow temperature superhigh pressure facial make-up formula self sealss ball valve of this kind of structure, the most function in the medium pressure of lumen are in the spheroid lid, make spheroid lid closely laminate with first sealing washer, second sealing washer, realize the self sealss effect, and the medium power is born by four ring-opening, finally acts on the valve body, effectively solves the sealed problem of centre way of facial make-up ball valve in ultralow temperature superhigh pressure environment. The design pressure of the upper-mounted ball valve used in the ultra-low temperature and ultra-high pressure environment reaches more than 1500LB, and the design temperature is as low as-196 ℃.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention; the above description is only for the specific embodiment of the present invention, and is not intended to limit the scope of the present invention; any modification, equivalent replacement, improvement and the like of the technical solution of the present invention by a person of ordinary skill in the art without departing from the design spirit of the present invention shall fall within the protection scope determined by the claims of the present invention.