CN214838628U

CN214838628U - High-temperature and high-pressure resistant check valve

Info

Publication number: CN214838628U
Application number: CN202120856059.6U
Authority: CN
Inventors: 陈孝凌; 陈圣如
Original assignee: Zhejiang Xinghe Valve Co ltd
Current assignee: Zhejiang Xinghe Valve Co ltd
Priority date: 2021-04-24
Filing date: 2021-04-24
Publication date: 2021-11-23
Anticipated expiration: 2031-04-24

Abstract

The utility model discloses a high temperature and high pressure resistant check valve, which comprises a valve body, a valve cover arranged on the valve body and a valve clack arranged in the valve body, wherein a first flow passage and a second flow passage are respectively arranged at the two ends of the valve body, a flow passage cavity communicated with the first flow passage and the second flow passage is arranged in the middle of the valve body, the valve clack is arranged in the flow passage cavity in a sliding way, and a valve seat which is in sealing fit with the valve clack and a spring which is used for pressing the valve clack on the valve seat are arranged in the flow passage cavity; still include sealed bush and sealing ring, the inner of sealed bush is equipped with the supporting part, and sealed bush runs through the valve gap and makes the supporting part stretch into the overflowing chamber, it is right to be equipped with on the inner wall in overflowing chamber the supporting part constitutes spacing step, the inner of valve gap is equipped with extrusion portion, extrusion portion will seal the ring pressure and establish on the up end of supporting part. The utility model has the characteristics of high temperature resistant and high pressure resistant to guarantee the good leakproofness of valve, make it use safelyr.

Description

High-temperature and high-pressure resistant check valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a high temperature and high pressure resistant check valve.

Background

The check valve is an important accessory for controlling industrial and building pipelines, is a control part in a fluid conveying system, and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. Check valves in the prior art are further classified into cast iron check valves, cast steel check valves, stainless steel check valves, chrome molybdenum vanadium steel check valves, dual-phase steel check valves, plastic check valves, non-standard and other valve materials according to the material.

However, no matter which material is adopted for the check valve in the prior art, the mechanical performance is reduced along with the temperature rise, and the sealing performance is reduced along with the temperature rise, so that when the check valve is used in a harsher working condition (high temperature and high pressure), the performance of most conventional check valves is reduced, and the safety is reduced along with the performance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high temperature and high pressure resistant check valve, the utility model has the characteristics of high temperature resistant and high pressure resistant to guarantee the good leakproofness of valve, make it use safer.

In order to achieve the above object, the utility model provides a following technical scheme: a high-temperature and high-pressure resistant check valve comprises a valve body, a valve cover arranged on the valve body and a valve clack arranged in the valve body, wherein a first flow passage and a second flow passage are respectively arranged at two ends of the valve body; still include sealed bush and sealing ring, the inner of sealed bush is equipped with the supporting part, and sealed bush runs through the valve gap and makes the supporting part stretch into the overflowing chamber, it is right to be equipped with on the inner wall in overflowing chamber the supporting part constitutes spacing step, the inner of valve gap is equipped with extrusion portion, extrusion portion will seal the ring pressure and establish on the up end of supporting part.

Through adopting above-mentioned technical scheme, make the valve have the effect of self sealss, under high temperature high pressure operating mode, the inflation can take place for sealing ring self, under the squeezing action of valve gap extrusion portion, the sealing ring is restricted between valve gap extrusion portion and sealing bush supporting part, and the sealing ring is the inflation more, and the sealed effect that the sealing ring brought is better to show the risk that has reduced the medium and leaked outward, guarantee the security that the valve used.

The utility model discloses further set up to, the outer wall of extrusion portion and the inner wall threaded connection who overflows the chamber.

Through adopting above-mentioned technical scheme, simple structure, the dismouting is very convenient to the valve gap of screwing can realize pressing the effect of sealing ring on the supporting part, and it is very convenient to operate, compresses tightly effectual moreover.

The utility model discloses further set up to, the upper end of supporting part is equipped with that first toper is domatic, the lower extreme of sealing ring is equipped with the second toper domatic with the domatic looks adaptation of first toper.

Through adopting above-mentioned technical scheme, can promote the assembly degree of agreeing with of sealing ring and supporting part, can increase the area of contact of the two simultaneously to the increase hinders the resistance that the medium passed, promotes the leakproofness between the two.

The utility model discloses further set up to, the domatic middle part of first toper is equipped with the first location convex part that sets up along circumference, be equipped with on the sealing ring with the first location concave part that first location convex part agrees with mutually.

Through adopting above-mentioned technical scheme, the location installation of the sealing ring of being convenient for promotes its stability of using simultaneously.

The utility model discloses further set up to, extrusion portion lower extreme middle part is equipped with along the second location convex part that circumference set up, be equipped with on the sealing ring with the second location concave part that second location convex part agrees with to the central diameter of second location concave part equals with the central diameter size of first location concave part.

Through adopting above-mentioned technical scheme, can further promote the steadiness of sealing ring installation, more must go towards inside and outside deformation when making the sealing ring inflation simultaneously, further promote the sealed effect of sealing ring.

The utility model discloses further set up to, downwardly extending's cavity is seted up to the upper end of valve clack, the lower part of valve clack is equipped with and is used for constituting sealed complex toper sealing with the disk seat, the cavity sets up in toper sealing top.

Through adopting above-mentioned technical scheme, can not only save material, can guarantee moreover that the focus of valve clack keeps on the toper sealing, can make the upper and lower displacement of valve clack more steady, reduces the local friction harm of valve clack to promote the life of valve clack.

The utility model discloses further set up to, the valve clack upper end is equipped with first annular positioning groove, the lower extreme of supporting part is equipped with second annular positioning groove, the one end of spring sets up in first annular positioning groove, the other end of spring sets up in second annular positioning groove.

Through adopting above-mentioned technical scheme, the location installation of the spring of being convenient for guarantees the stability when the spring is flexible simultaneously.

The utility model discloses further set up to, the outer end of seal bush is equipped with screw thread portion, threaded connection has bush lock nut on the screw thread portion, bush lock nut supports on the outer terminal surface of valve gap.

Through adopting above-mentioned technical scheme, can lock the seal bush, avoid it to take place axial displacement and influence the sealed effect of valve.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a valve cover; 3. a valve flap; 4. a first flow passage; 5. a second flow passage; 6. a flow-through chamber; 7. a valve seat; 8. a seal bushing; 9. a seal ring; 10. a support portion; 11. a limiting step; 12. a pressing section; 13. a first tapered ramp; 14. a second tapered slope; 15. a first positioning protrusion; 16. a first positioning recess; 17. a second positioning projection; 18. a second positioning recess; 19. a cavity; 20. a tapered seal portion; 21. a first annular positioning groove; 22. a second annular positioning groove; 23. a threaded portion; 24. a bushing lock nut; 25. a spring.

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.

Example (b): the high-temperature and high-pressure resistant check valve shown in the attached

drawings

1 and 2 comprises a valve body 1, a valve cover 2 arranged on the valve body 1 and a valve flap 3 arranged in the valve body 1, wherein a first flow passage 4 and a second flow passage 5 are respectively arranged at two ends of the valve body 1, an overflowing cavity 6 communicated with the first flow passage 4 and the second flow passage 5 is arranged in the middle of the valve body 1, the valve flap 3 is arranged in the overflowing cavity 6 in a sliding manner, a valve seat 7 which is in sealing fit with the valve flap 3 and a spring 25 for pressing the valve flap 3 on the valve seat 7 are arranged in the overflowing cavity 6, the valve seat 7 and the valve body 1 are of an integrated structure, and the processing is very convenient; this check valve still includes sealed bush 8 and sealing ring 9, the inner of sealed bush 8 is equipped with supporting part 10, and supporting part 10 extends to the periphery, and sealed bush 8 runs through valve gap 2 and makes supporting part 10 stretch into in overflowing chamber 6, it is right to be equipped with on the inner wall in overflowing chamber 6 supporting part 10 constitutes spacing step 11, and the outer wall of supporting part 10 is laminated with the inner wall that overflows chamber 6 mutually, the inner of valve gap 2 is equipped with extrusion portion 12, extrusion portion 12 presses sealing ring 9 to be established on the up end of supporting part 10. Under the high temperature high pressure operating mode, the inflation can take place for sealing ring 9 self, under the squeezing action of valve gap 2 extrusion portion 12, sealing ring 9 is restricted between valve gap 2

extrusion portion

12 and 8 supporting parts 10 of sealing bush, and sealing ring 9 is the inflation more, and the sealed effect that sealing ring 9 brought is better to show the risk that has reduced the medium and leaked outward, guarantee the security of valve use.

As shown in the attached drawing 1, the outer wall of the extrusion part 12 is in threaded connection with the inner wall of the overflowing cavity 6, the design structure is simple, the disassembly and the assembly are very convenient, the effect of pressing the sealing ring 9 on the supporting part 10 can be realized by screwing the valve cover 2, the operation is very convenient, and the pressing effect is good.

As shown in fig. 2, the upper end of the supporting portion 10 is provided with a first tapered slope 13, and the lower end of the sealing ring 9 is provided with a second tapered slope 14 adapted to the first tapered slope 13, that is, the upper portion of the supporting portion 10 is convex, and the lower portion of the sealing ring 9 is concave. The design can improve the fitting degree of fit between the sealing ring 9 and the supporting part 10, and simultaneously can increase the contact area of the sealing ring and the supporting part, thereby increasing the resistance for preventing the medium from passing through and improving the sealing property between the sealing ring and the supporting part.

As shown in fig. 2, a first positioning convex portion 15 is disposed at the middle portion of the first tapered slope 13 along the circumferential direction, the cross section of the first positioning convex portion 15 is semicircular, and a first positioning concave portion 16 engaged with the first positioning convex portion 15 is disposed on the sealing ring 9. This design facilitates the location installation of sealing ring 9, promotes its stability of using simultaneously.

As shown in fig. 2, a second positioning protrusion 17 is disposed at the middle of the lower end of the pressing portion 12 along the circumferential direction, the cross section of the second positioning protrusion 17 is semicircular, a second positioning recess 18 matched with the second positioning protrusion 17 is disposed on the sealing ring 9, and the central diameter of the second positioning recess 18 is equal to the central diameter of the first positioning recess 16. This design can further promote the steadiness of sealing ring 9 installation, more must go towards inside and outside deformation when making sealing ring 9 inflation simultaneously, further promotes sealing ring 9's sealed effect.

As shown in fig. 1, the upper end of the valve flap 3 is opened with a cavity 19 extending downward, the lower part of the valve flap 3 is provided with a conical sealing part 20 for forming a sealing fit with the valve seat 7, and the cavity 19 is arranged above the conical sealing part 20. This design can not only save material, can guarantee moreover that the focus of valve clack 3 keeps on toper sealing 20, can make the upper and lower displacement of valve clack 3 more steady, reduces the local friction harm of valve clack 3 to promote valve clack 3's life.

As shown in fig. 1, the upper end of the valve flap 3 is provided with a first annular positioning groove 21, the lower end of the support portion 10 is provided with a second annular positioning groove 22, one end of the spring 25 is disposed in the first annular positioning groove 21, the other end of the spring 25 is disposed in the second annular positioning groove 22, and two ends of the spring 25 can be directly embedded in the corresponding positioning grooves. This design is convenient for the location installation of spring 25, guarantees the stability when spring 25 stretches out and draws back simultaneously.

As shown in fig. 1, the outer end of the sealing bush 8 is provided with a threaded portion 23, a bush locking nut 24 is screwed on the threaded portion 23, and the bush locking nut 24 abuts against the outer end face of the bonnet 2. This design can lock seal bush 8, avoids it to take place axial displacement and influences the sealed effect of valve.

The working principle is as follows: under the high temperature high pressure operating mode, the inflation can take place for sealing ring 9 self, under the squeezing action of valve gap 2 extrusion portion 12, sealing ring 9 is restricted between valve gap 2

extrusion portion

Claims

1. A high-temperature and high-pressure resistant check valve comprises a valve body (1), a valve cover (2) arranged on the valve body (1) and a valve flap (3) arranged in the valve body (1), wherein a first flow passage (4) and a second flow passage (5) are respectively arranged at two ends of the valve body (1), a flow passing cavity (6) communicated with the first flow passage (4) and the second flow passage (5) is arranged in the middle of the valve body (1), the valve flap (3) is arranged in the flow passing cavity (6) in a sliding manner, a valve seat (7) in sealing fit with the valve flap (3) and a spring (25) for pressing the valve flap (3) on the valve seat (7) are arranged in the flow passing cavity (6); the method is characterized in that: still include sealed bush (8) and sealing ring (9), the inner of sealed bush (8) is equipped with supporting part (10), and sealed bush (8) run through valve gap (2) and make supporting part (10) stretch into in overflowing chamber (6), it is right to be equipped with on the inner wall in overflowing chamber (6) supporting part (10) constitute spacing step (11), the inner of valve gap (2) is equipped with extrusion portion (12), extrusion portion (12) are pressed sealing ring (9) and are established on the up end of supporting part (10).

2. A high temperature and high pressure resistant check valve as defined in claim 1, wherein: the outer wall of the extrusion part (12) is in threaded connection with the inner wall of the overflowing cavity (6).

3. A high temperature and high pressure resistant check valve as defined in claim 1, wherein: the upper end of the supporting part (10) is provided with a first tapered slope surface (13), and the lower end of the sealing ring (9) is provided with a second tapered slope surface (14) matched with the first tapered slope surface (13).

4. A high temperature and high pressure resistant check valve as defined in claim 3, wherein: the middle part of the first conical slope surface (13) is provided with a first positioning convex part (15) arranged along the circumferential direction, and the sealing ring (9) is provided with a first positioning concave part (16) matched with the first positioning convex part (15).

5. The high temperature and pressure resistant check valve of claim 4, wherein: and a second positioning convex part (17) arranged along the circumferential direction is arranged in the middle of the lower end of the extrusion part (12), a second positioning concave part (18) matched with the second positioning convex part (17) is arranged on the sealing ring (9), and the central diameter of the second positioning concave part (18) is equal to that of the first positioning concave part (16).

6. A high temperature and high pressure resistant check valve as defined in claim 1, wherein: the valve is characterized in that a cavity (19) extending downwards is formed in the upper end of the valve clack (3), a conical sealing part (20) in sealing fit with the valve seat (7) is arranged on the lower portion of the valve clack (3), and the cavity (19) is arranged above the conical sealing part (20).

7. A high temperature and high pressure resistant check valve as defined in claim 1, wherein: valve clack (3) upper end is equipped with first annular constant head tank (21), the lower extreme of supporting part (10) is equipped with second annular constant head tank (22), the one end of spring (25) sets up in first annular constant head tank (21), the other end of spring (25) sets up in second annular constant head tank (22).

8. A high temperature and high pressure resistant check valve as defined in claim 1, wherein: the outer end of the sealing bush (8) is provided with a threaded portion (23), a bush locking nut (24) is connected to the threaded portion (23) in a threaded mode, and the bush locking nut (24) abuts against the outer end face of the valve cover (2).