CN220668387U - High-pressure forged stop valve - Google Patents
High-pressure forged stop valve Download PDFInfo
- Publication number
- CN220668387U CN220668387U CN202322229180.8U CN202322229180U CN220668387U CN 220668387 U CN220668387 U CN 220668387U CN 202322229180 U CN202322229180 U CN 202322229180U CN 220668387 U CN220668387 U CN 220668387U
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- China
- Prior art keywords
- valve
- clack
- ring
- valve clack
- valve body
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- 238000007789 sealing Methods 0.000 claims abstract description 47
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 238000005242 forging Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 30
- 238000007906 compression Methods 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 21
- 210000004907 gland Anatomy 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 239000000919 ceramic Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Abstract
The utility model relates to a high-pressure forging stop valve, which comprises a valve body, a valve clack, a valve cover and a valve rod, wherein the valve body, the valve clack and the valve cover are made of forged steel parts, a self-sealing device is arranged between the valve cover and the valve body, a wedging ring is arranged between the valve cover and the valve body and is pressed between the valve cover and the valve body by a pressing ring, and the pressing ring is fixedly arranged in the upper end surface of the valve body by bolts, so that the pressure resistance is good, and the sealing performance of a middle cavity is reliable; the valve rod is flexibly connected with the valve clack, so that the impact force between the valve clack and the valve seat is relieved when the valve clack is closed, the valve clack is prevented from being damaged by impact, and the sealing performance and the service life of the sealing pair are improved.
Description
Technical Field
The utility model belongs to the field of valves, and particularly relates to a forged stop valve. The utility model is suitable for the working condition of high-temperature high-pressure medium.
Background
The forged stop valve is commonly used in high-temperature and high-pressure pipelines of power stations, and the valve body, the valve core and the valve cover are manufactured by adopting a forging process and have high-pressure resistance. The forged high-pressure self-sealing stop valve with the patent number of CN202021009852.4 is characterized in that the cavity is formed by compressing and installing a sealing nut in the valve body by valve cover pressure to form a self-sealing structure. The main disadvantages are: the valve cover is arranged in the middle cavity of the valve body by adopting threads, and under the working condition of high-pressure medium, the threads between the valve cover and the valve body bear great pressure for a long time, so that the fatigue of the threads cannot bear the pressure of the medium, the sealing performance of the middle cavity is reduced, and even the safety accident that the valve cover is beaten out by the high-pressure medium occurs; in addition, the valve clack fixed mounting is in the valve rod lower extreme, and in closing the in-process, valve clack and disk seat rigid contact produce great striking, lead to valve clack sealing surface striking wearing and tearing or damage easily, influence sealing performance and product life.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model provides the high-pressure forging stop valve which has reliable sealing performance of the middle cavity, adopts a flexible matching structure between the valve clack and the valve seat, reduces the impact force when the valve clack and the valve seat are closed, and has reliable sealing performance and long service life.
The technical scheme of the utility model is as follows:
the high-pressure forged stop valve comprises a valve body, a valve clack, a valve cover and a valve rod, wherein the valve body, the valve clack and the valve cover are made of forged steel, the valve body is of a lower-inlet and upper-outlet structure, a valve seat made of hard alloy materials is deposited between inlet and outlet channels of the valve body, the lower end face of the valve clack is provided with a conical sealing surface matched with the valve seat, the upper face of the valve clack is connected with the valve rod, a self-sealing device is arranged between the valve cover and the valve body, the self-sealing device is formed by arranging a wedging ring between the valve cover and the valve body, and an inner conical surface at the lower end of the wedging ring is matched with an outer conical surface of the valve cover; the method is characterized in that: the upper end surface of the wedge ring is installed between the valve cover and the valve body by adopting a compression ring in a compression manner; the valve rod and the valve clack adopt a flexible connection structure, the flexible connection structure is composed of a disc spring arranged between the lower end surface of the valve rod and the bottom surface of the valve clack installation cavity, and a radial shoulder at the lower end of the valve rod is installed in the valve clack installation cavity through a gland.
Preferably, the upper end face of the wedge ring is provided with a pre-tightening device, the pre-tightening device consists of a compression ring and a compression bolt, the compression ring is embedded in an annular space between the outer circular face of the valve cover and the inner hole wall of the compression ring, the lower circular face of the compression ring is pressed on the inner circular face of the upper end of the wedge ring, the compression bolt is arranged in a screw hole of a radial shoulder on the outer circular face of the valve cover, and the lower end of the compression bolt is pressed in the upper circular face of the compression ring.
Preferably, a composite sealing device is adopted between the valve cover and the valve rod, and the composite sealing device is formed by arranging a grease injection sealing ring in the middle of a graphite sealing ring.
Preferably, the valve clack adopts ceramic material, sets up metal link between valve clack and valve rod, and nut and gland external screw thread interconnect in the metal link upper end, valve clack installation cavity center are equipped with the through-hole of terminal surface under the intercommunication, and the cylindric lock that metal link lower extreme was equipped with interior screw stretches into in the through-hole, and the terminal surface sets up the metal sheet under the valve clack, the metal sheet is by the interior screw threaded connection fixed mounting of set screw and metal link lower extreme in the terminal surface under the valve clack.
Compared with the prior art, the utility model has the beneficial effects that: the wedging ring of the self-sealing device is pressed between the valve cover and the valve body by a pressing ring, the pressing ring is fixedly arranged in the upper end surface of the valve body by a bolt, the pressure resistance is good, and the sealing performance of the middle cavity is reliable; the valve rod is flexibly connected with the valve clack, so that the impact force between the valve clack and the valve seat is relieved when the valve clack is closed, the valve clack is prevented from being damaged by impact, and the sealing performance and the service life of the sealing pair are improved.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: the valve comprises a valve body 1, a valve seat 2, a valve clack 3, a disc spring 4, a valve rod 5, a gland 6, a valve cover 7, a wedge ring 8, a compression ring 9, a graphite sealing ring 10, a packing gland 11, a compression bolt 12, a radial shoulder 13, a compression ring 14, a metal connecting frame 15, a metal plate 16 and a fixing screw 17.
Detailed Description
The high-pressure forged stop valve shown in fig. 1 comprises a valve body 1, a valve clack 3, a valve cover 7 and a valve rod 5, wherein the valve body 1, the valve clack 3 and the valve cover 7 are made of forged steel, the high-pressure resistant performance is achieved, the valve body 1 adopts a lower-inlet upper-outlet structure, a valve seat 2 made of hard alloy materials is deposited between inlet and outlet channels of the valve body, a conical sealing surface matched with the valve seat 2 is arranged on the lower end surface of the valve clack 3, an automatic calibration center is arranged on the sealing surface of the valve seat 2 in the closing process of the valve clack 3, the sealing performance between the sealing surface of the valve clack 3 and the sealing surface of the valve seat 2 is improved, the upper surface of the valve clack 3 is connected with the valve rod 5, a self-sealing device is arranged between the valve cover 7 and the valve body 1, a wedge ring 8 is arranged between the valve cover 7 and the valve body 1, the inner conical surface at the lower end of the wedge ring 8 is matched with the outer conical surface of the valve cover 7, the medium pressure pushes the valve cover 7 to move upwards to be wedged and sealed with the wedge ring 8, and the sealing performance is better when the pressure is higher; the method is characterized in that: the upper end surface of the wedge ring 8 is installed between the valve cover 7 and the valve body 1 in a pressing way by adopting a pressing ring 9, the pressing ring 9 is fixedly installed in the upper end surface of the middle cavity of the valve body 1 by adopting a screw, the bearing capacity is strong, and the sealing reliability of the middle cavity is good; adopt flexible connection structure between valve rod 5 and the valve clack 3, flexible connection structure comprises valve rod 5 lower terminal surface and valve clack 3 installation cavity bottom surface between setting up dish spring 4, and the radial step of valve rod 5 lower extreme passes through gland 6 and installs in the installation cavity of valve clack 3, and the hard collision when contact between valve clack 3 and the disk seat 2 is slowed down to the elasticity of dish spring 4 when closing, prevents that valve clack 3 sealed face from receiving the striking damage, improves sealed vice sealing reliability and the life of sealing.
The upper end face of the wedging ring 8 is provided with a pre-tightening device, the pre-tightening device consists of a compression ring 14 and a compression bolt 12, the compression ring 14 is movably embedded in an annular space between the outer circular surface of the valve cover 7 and the inner hole wall of the compression ring 9, the lower circular surface of the compression ring is pressed on the inner circular surface of the upper end of the wedging ring 8, the compression bolt 12 is installed in a screw hole of a radial shoulder 13 on the outer circular surface of the valve cover 7, the lower end of the compression bolt is pressed on the upper circular surface of the compression ring 14, the wedging ring 8 is pressed between the valve cover 7 and the valve body 1 by adjusting the compression screw 12, the pre-tightening sealing of a middle cavity after product assembly is realized, and the radial shoulder 13 is fixedly installed on the outer circular surface of the valve cover 7, so that the product assembly is convenient.
The composite sealing device is adopted between the valve cover 7 and the valve rod 5, the composite sealing device is formed by arranging a grease injection sealing ring in the middle of a graphite sealing ring 10, the sealing performance between the valve rod 5 and the valve cover 7 is improved, and the graphite sealing ring 10 is tightly pressed and installed in a stuffing box between the valve cover 5 and the valve cover 7 by a stuffing gland 11.
The valve clack 3 adopts ceramic material, sets up metal link 15 between valve clack 3 and valve rod 5, and metal link 15 upper end internal nut and gland 6 external screw thread interconnect realize the connection of ceramic valve clack and valve rod 5, and valve clack 3 installation cavity center is equipped with the through-hole of terminal surface under the intercommunication, and metal link 15 lower extreme is equipped with the cylindric lock and stretches into in the through-hole, and the cylindric lock lower part is equipped with interior screw, and valve clack 3 lower terminal surface sets up metal sheet 16, metal sheet 16 is by set screw 17 fixed mounting in valve clack 3 lower terminal surface, set screw 17 and the interior screw threaded connection of metal link 15 lower extreme, with ceramic valve clack whole fixed mounting on metal link 15, ceramic valve clack local atress and damage when avoiding opening and close.
Claims (4)
1. The utility model provides a high-pressure forging stop valve, includes valve body (1), valve clack (3), valve gap (7), valve rod (5), valve body (1), valve clack (3), valve gap (7) adopt forging steel spare, valve body (1) adopt down advance go up out the structure, build up welding carbide material's disk seat (2) between its exit passageway, valve clack (3) lower terminal surface sets up the circular cone sealed face with disk seat (2) mutually supporting, valve clack (3) are connected with valve rod (5) above, set up self sealing device between valve gap (7) and valve body (1), self sealing device adopts to set up wedge ring (8) between valve gap (7) and valve body (1) and constitutes, wedge ring (8) lower extreme inner cone face and valve gap (7) outer cone face mutually supporting; the method is characterized in that: the upper end surface of the wedge ring (8) is installed between the valve cover (7) and the valve body (1) in a pressing way by adopting a pressing ring (9); adopt flexible connection structure between valve rod (5) and valve clack (3), flexible connection structure comprises valve rod (5) lower terminal surface and valve clack (3) installation intracavity bottom surface between setting up dish spring (4), and radial step of valve rod (5) lower extreme passes through gland (6) and installs in the installation intracavity of valve clack (3).
2. The high-pressure forged stop valve according to claim 1, wherein: the upper end face of the wedging ring (8) is provided with a pre-tightening device, the pre-tightening device consists of a compression ring (14) and a compression bolt (12), the compression ring (14) is movably embedded in an annular space between the outer circular face of the valve cover (7) and the inner hole wall of the compression ring (9), the lower circular face of the compression ring is pressed on the inner circular face of the upper end of the wedging ring (8), the compression bolt (12) is installed in a screw hole of a radial shoulder (13) on the outer circular face of the valve cover (7), and the lower end of the compression bolt is pressed in the upper circular face of the compression ring (14).
3. The high-pressure forged stop valve according to claim 2, wherein: a composite sealing device is adopted between the valve cover (7) and the valve rod (5), and the composite sealing device is formed by arranging a grease injection sealing ring in the middle of a graphite sealing ring (10).
4. A high pressure forged stop valve according to claim 1 or 2 or 3, characterized in that: the valve clack (3) adopts ceramic material, sets up metal link (15) between valve clack (3) and valve rod (5), and nut and gland (6) external screw interconnect in metal link (15) upper end, valve clack (3) installation cavity center are equipped with the through-hole of terminal surface under the intercommunication, and metal link (15) lower extreme is equipped with the cylindric lock and stretches into in the through-hole, and cylindric lock lower part is equipped with interior screw, and valve clack (3) lower terminal surface sets up metal sheet (16), metal sheet (16) are by dead screw (17) fixed mounting in valve clack (3) lower terminal surface, and dead screw (17) and the interior screw threaded connection of metal link (15) lower extreme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322229180.8U CN220668387U (en) | 2023-08-18 | 2023-08-18 | High-pressure forged stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322229180.8U CN220668387U (en) | 2023-08-18 | 2023-08-18 | High-pressure forged stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220668387U true CN220668387U (en) | 2024-03-26 |
Family
ID=90339336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322229180.8U Active CN220668387U (en) | 2023-08-18 | 2023-08-18 | High-pressure forged stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220668387U (en) |
-
2023
- 2023-08-18 CN CN202322229180.8U patent/CN220668387U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |