CN223725459U - A recirculation minimum flow valve for a water pump - Google Patents
A recirculation minimum flow valve for a water pumpInfo
- Publication number
- CN223725459U CN223725459U CN202520533546.7U CN202520533546U CN223725459U CN 223725459 U CN223725459 U CN 223725459U CN 202520533546 U CN202520533546 U CN 202520533546U CN 223725459 U CN223725459 U CN 223725459U
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- valve
- valve core
- seat
- fixedly connected
- ring
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Abstract
本实用新型公开了一种给水泵用再循环最小流量阀，包括阀壳，所述阀壳内腔的上端固定连接有阀座，所述阀座内腔的底部固定连接有环形密封座，所述环形密封座的顶部由外至内依次固定连接有第一司太立合金环和第二司太立合金环，所述阀座内腔的上端活动连接有调节柱。本实用新型通过阀杆、阀壳、调节柱、主阀芯、施压弹簧、副阀芯、第二楔形槽、环形密封座、第二司太立合金环、第一楔形槽、第一司太立合金环和阀座之间配合的作用下，能够在关阀的过程中实现双重密封的效果，且由于第一司太立合金环和第二司太立合金环均具备良好的耐磨蚀性能，能够在水流长时间的冲击侵蚀下而避免表面受损，从而确保整体长久使用的密封性能。
This utility model discloses a recirculation minimum flow valve for a water pump, comprising a valve housing, a valve seat fixedly connected to the upper end of the inner cavity of the valve housing, an annular sealing seat fixedly connected to the bottom of the inner cavity of the valve seat, and a first Stellite alloy ring and a second Stellite alloy ring fixedly connected sequentially from the outside to the inside of the top of the annular sealing seat. An adjusting column is movably connected to the upper end of the inner cavity of the valve seat. This utility model achieves a double sealing effect during valve closing through the cooperation of the valve stem, valve housing, adjusting column, main valve core, pressure spring, auxiliary valve core, second wedge groove, annular sealing seat, second Stellite alloy ring, first wedge groove, first Stellite alloy ring, and valve seat. Furthermore, because both the first and second Stellite alloy rings possess excellent wear and corrosion resistance, they can avoid surface damage under prolonged impact and erosion from water flow, thus ensuring the overall sealing performance for long-term use.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a recirculation minimum flow valve for a water supply pump.
Background
The minimum flow valve of the water supply pump recycling is one of important regulating valves applied to a high-pressure water supply system of a power plant, the minimum flow valve used by each large power plant at present is depressurized step by step through a sleeve, meanwhile, the valve sealing is guaranteed through a soft-hard double sealing structure, the soft sealing can achieve good sealing effect in the initial use period, but the soft sealing continuously bears steam-water flushing after the lapse of time, especially a peak shaver set with frequent starting and stopping, the sealing surface is particularly severely flushed, the sealing performance of the soft sealing is greatly reduced, the flushing of the soft sealing is easily accelerated to cause the internal leakage of the valve due to the flushing of the steam-water on the hard sealing, and the valve closing force is easily caused or the internal leakage of the valve in the actual use due to unreasonable design of a balance sealing ring and a valve core sealing surface.
Disclosure of utility model
The utility model aims to provide a recirculation minimum flow valve for a water supply pump, which has the advantages of greatly improving the sealing performance of the valve, effectively enhancing the flushing resistance and reducing the maintenance frequency.
The minimum recirculation flow valve for the water supply pump comprises a valve housing, wherein the upper end of an inner cavity of the valve housing is fixedly connected with a valve seat, the bottom of the inner cavity of the valve seat is fixedly connected with an annular sealing seat, the top of the annular sealing seat is sequentially and fixedly connected with a first stellite ring and a second stellite ring from outside to inside, the upper end of the inner cavity of the valve seat is movably connected with an adjusting column, the top of the adjusting column is sleeved with a valve rod, the surface of the valve rod is in threaded connection with the middle end of the top of the valve housing, the lower end of the adjusting column is fixedly connected with a main valve core, the outer surface of the main valve core is movably connected with the middle end of the inner cavity of the valve seat, the bottom of the main valve core is provided with a first wedge groove, the lower end of the inner cavity of the main valve core is movably connected with a subsidiary valve core, the bottom of the subsidiary valve core is provided with a second wedge groove, and the periphery of the top of the subsidiary valve core and the periphery of the bottom of the adjusting column are fixedly connected with a pressing spring.
As the preferable scheme, the upper end fixed mounting of adjusting post has first piston ring, the surface swing joint of first piston ring is in the upper end of disk seat inner chamber, the upper end of adjusting post just is located the below fixed mounting of first piston ring and has first high temperature fluororubber O shape ring, the surface swing joint of first high temperature fluororubber O shape ring is in the upper end of disk seat inner chamber.
As a preferable scheme, the upper end of the outer surface of the main valve core is fixedly provided with a second high-temperature fluororubber O-shaped ring, the surface of the second high-temperature fluororubber O-shaped ring is movably connected with the middle end of the inner cavity of the valve seat, the lower end of the inner cavity of the valve seat is fixedly provided with a second piston ring, and the outer surface of the main valve core is movably connected with the surface of the second piston ring.
As a preferable scheme, the middle end of the auxiliary valve core is fixedly provided with third high-temperature fluororubber O-shaped rings, the number of the third high-temperature fluororubber O-shaped rings is two, the surface of the third high-temperature fluororubber O-shaped rings is movably connected to the lower end of the inner cavity of the main valve core, the upper end of the auxiliary valve core is fixedly provided with a third piston ring, and the surface of the third piston ring is movably connected to the middle end of the inner cavity of the main valve core.
As a preferable scheme, guide posts are connected to the periphery of the adjusting post in a threaded manner, and the surface of the auxiliary valve core is movably connected to the lower end of the guide post.
As the preferable scheme, the bottom fixedly connected with main pressure regulating sleeve of disk seat surface, first pressure regulating hole has been seted up to main pressure regulating telescopic surface, main pressure regulating telescopic surface fixedly connected with auxiliary pressure regulating sleeve, the second pressure regulating hole has been seted up on auxiliary pressure regulating telescopic surface.
As the preferable scheme, the upper end fixedly connected with inlet tube on valve casing right side, the lower extreme fixedly connected with outlet pipe on valve casing left side.
Compared with the prior art, the utility model has the following beneficial effects:
1. According to the valve, under the action of the valve rod, the valve shell, the adjusting column, the main valve core, the pressing spring, the auxiliary valve core, the second wedge-shaped groove, the annular sealing seat, the second stellite alloy ring, the first wedge-shaped groove, the first stellite alloy ring and the valve seat, the double sealing effect can be achieved in the valve closing process, and as the first stellite alloy ring and the second stellite alloy ring have good abrasion resistance, the surface is prevented from being damaged under the long-time impact erosion of water flow, the sealing performance of the whole valve is ensured for a long time, meanwhile, the first wedge-shaped groove at the bottom of the main valve core adopts the back-off mode relative to the water flow direction, the surface of the first wedge-shaped groove is effectively prevented from being directly washed off by water when the valve is at a small opening degree, the damage probability of the surface of the first wedge-shaped groove is reduced, meanwhile, the stable sealing performance of the back-off sealing mode can be maintained in the long-time use process of the valve, and the maintenance or replacement frequency is reduced.
2. According to the utility model, by arranging the first piston ring and the first high-temperature fluororubber O-shaped ring, a double sealing effect can be formed between the adjusting column and the valve seat, the contact tightness between the adjusting column and the valve seat is effectively improved, the water body is prevented from leaking from the valve seat to the adjusting column in the whole use process, by arranging the second high-temperature fluororubber O-shaped ring and the second piston ring, the double sealing effect can be formed between the main valve core and the valve seat, the contact tightness between the main valve core and the valve seat is effectively improved, the water body is prevented from leaking from the main valve core to the valve seat in the whole use process, the double sealing effect can be formed between the main valve core and the auxiliary valve core by arranging the third high-temperature fluororubber O-shaped ring and the third piston ring, the contact tightness between the main valve core and the auxiliary valve core is effectively improved, the water body is prevented from leaking from the main valve core to the auxiliary valve core in the whole use process, the auxiliary valve core is prevented from falling off in the use process by arranging the guide column.
3. According to the utility model, through the arrangement of the main pressure regulating sleeve, the auxiliary pressure regulating sleeve, the first pressure regulating hole and the second pressure regulating hole, the pressure on the high pressure side can be gradually led to the low pressure side under the action of closing the valve by personnel, and the pressure difference generated on two sides in the valve closing process is effectively reduced, so that the large impact on the main valve core and the auxiliary valve core caused by overlarge pressure difference is avoided, and the water pump pipeline and the water draining pipeline can be respectively connected through the arrangement of the water inlet pipe and the water outlet pipe.
Drawings
FIG. 1 is a perspective view of the present utility model;
FIG. 2 is a schematic cross-sectional view of the valve housing of the present utility model;
FIG. 3 is a schematic cross-sectional view of a main valve core of the present utility model;
fig. 4 is an enlarged view of a portion of fig. 2 according to the present utility model.
The valve comprises a valve shell, a water outlet pipe, a valve rod, a water inlet pipe, a first piston ring, a first high-temperature fluororubber O-shaped ring, a regulating column, a main valve core, a valve seat, a second high-temperature fluororubber O-shaped ring, a second piston ring, a secondary pressure regulating sleeve, a primary pressure regulating sleeve, a first wedge groove, a second wedge groove, a secondary valve core, a third high-temperature fluororubber O-shaped ring, a third piston ring, a guide column, a pressing spring, a first stellite ring, a second stellite ring and an annular sealing seat, wherein the first high-temperature fluororubber O-shaped ring, the second piston ring, the secondary pressure regulating sleeve, the primary pressure regulating sleeve, the second pressure regulating sleeve, the third pressure regulating sleeve, the fourth wedge groove, the third wedge groove, the fourth wedge groove, the fifth valve, the sixth valve core, the fifth valve core, the third high-temperature fluororubber O-shaped ring, the fourth valve core, the fifth valve, the fourth valve, the fifth valve, and the fifth valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Embodiment one:
Referring to fig. 1-4, the utility model provides a recirculation minimum flow valve for a water supply pump, which comprises a valve casing 1, wherein the upper end of the inner cavity of the valve casing 1 is fixedly connected with a valve seat 9, the bottom of the inner cavity of the valve seat 9 is fixedly connected with an annular sealing seat 23, the top of the annular sealing seat 23 is sequentially and fixedly connected with a first stellite alloy ring 21 and a second stellite alloy ring 22 from outside to inside, the upper end of the inner cavity of the valve seat 9 is movably connected with an adjusting column 7, the top of the adjusting column 7 is sleeved with a valve rod 3, the surface of the valve rod 3 is in threaded connection with the middle end of the top of the valve casing 1, the lower end of the adjusting column 7 is fixedly connected with a main valve core 8, the outer surface of the main valve core 8 is movably connected with the middle end of the inner cavity of the valve seat 9, the bottom of the main valve core 8 is provided with a first wedge groove 14, the lower end of the inner cavity of the main valve core 8 is movably connected with a subsidiary valve core 16, the bottom of the subsidiary valve core 16 is provided with a second wedge groove 15, and the periphery of the top of the subsidiary valve core 16 is fixedly connected with a pressing spring 20.
In the technical scheme, through the valve rod 3, the valve shell 1, the adjusting column 7, the main valve core 8, the pressure spring 20, the auxiliary valve core 16, the second wedge-shaped groove 15, the annular sealing seat 23, the second stellite alloy ring 22, the first wedge-shaped groove 14, the first stellite alloy ring 21 and the valve seat 9, under the matched action, the double sealing effect can be realized in the valve closing process, and as the first stellite alloy ring 21 and the second stellite alloy ring 22 have good abrasion resistance, the surface damage can be avoided under the long-time impact erosion of water flow, so that the overall long-time use sealing performance is ensured, and meanwhile, the surface of the first wedge-shaped groove 14 is effectively prevented from being directly washed by the water body in the mode of reversing relative to the water flow direction when the valve is small in opening degree, the probability of damaging the surface of the first wedge-shaped groove 14 is reduced, meanwhile, the stable sealing performance can be kept in the long-term use process of the valve in the sealing mode of reversing, and the maintenance or replacement frequency is reduced.
Embodiment two:
On the basis of the first embodiment, the utility model discloses that as shown in fig. 2 and 3, the upper end of an adjusting column 7 is fixedly provided with a first piston ring 5, the surface of the first piston ring 5 is movably connected with the upper end of an inner cavity of a valve seat 9, the upper end of the adjusting column 7 is fixedly provided with a first high-temperature fluororubber O-shaped ring 6 which is positioned below the first piston ring 5, the surface of the first high-temperature fluororubber O-shaped ring 6 is movably connected with the upper end of the inner cavity of the valve seat 9, the upper end of the outer surface of a main valve core 8 is fixedly provided with a second high-temperature fluororubber O-shaped ring 10, the surface of the second high-temperature fluororubber O-shaped ring 10 is movably connected with the middle end of the inner cavity of the valve seat 9, the lower end of the inner cavity of the valve seat 9 is fixedly provided with a second piston ring 11, the outer surface of the main valve core 8 is movably connected with the surface of the second piston ring 11, the middle end of a subsidiary valve core 16 is fixedly provided with a third high-temperature fluororubber O-shaped ring 17, the number of the subsidiary valve core 16 is two, the surface of the third high-temperature fluororubber O-shaped ring 17 is movably connected with the lower end of the inner cavity of the main valve core 8, the upper end of the subsidiary valve core 16 is fixedly connected with the guide column 18 of the inner cavity 19, and the lower end of the subsidiary valve core 19 is movably connected with the guide column 19, and the lower end of the guide column 19 is movably connected with the inner end of the main valve core 8.
In this technical scheme, through the setting of first piston ring 5 and first high temperature fluororubber O shape ring 6, can form dual seal effect between adjusting post 7 and disk seat 9, the effectual leakproofness of contact between adjusting post 7 and disk seat 9 that has improved, avoid the whole in-process of using water to take place to leak from between disk seat 9 and the adjusting post 7, through the setting of second high temperature fluororubber O shape ring 10 and second piston ring 11, can form dual seal effect between main valve core 8 and disk seat 9, the effectual leakproofness of contact between main valve core 8 and disk seat 9 that has improved, avoid the whole in-process of using water to take place to leak from between main valve core 8 and disk seat 9, through the setting of third high temperature fluororubber O shape ring 17 and third piston ring 18, can form dual seal effect between main valve core 8 and vice case 16, the effectual leakproofness of contact between main valve core 8 and vice case 16 that has improved, avoid the whole in-process of using water to take place to leak from between main valve core 8 and the vice case 16, through the setting up of guide post 19, the purpose of leading vice case 16 to take place to drop in the use of 16 has been reached.
Embodiment III:
On the basis of the first embodiment, as shown in fig. 1 and 2, the utility model discloses a valve seat 9, wherein the bottom of the outer surface of the valve seat is fixedly connected with a main pressure regulating sleeve 13, the surface of the main pressure regulating sleeve 13 is provided with a first pressure regulating hole, the outer surface of the main pressure regulating sleeve 13 is fixedly connected with a secondary pressure regulating sleeve 12, the surface of the secondary pressure regulating sleeve 12 is provided with a second pressure regulating hole, the upper end of the right side of the valve housing 1 is fixedly connected with a water inlet pipe 4, and the lower end of the left side of the valve housing 1 is fixedly connected with a water outlet pipe 2.
In this technical scheme, through the setting of main pressure regulating sleeve 13, vice pressure regulating sleeve 12, first pressure regulating hole and second pressure regulating hole, can be under personnel's close effect for the pressure of high pressure side can be led to the low pressure side gradually, the effectual pressure differential that reduces the in-process both sides of closing the valve produced, thereby avoid pressure differential too big and cause great impact to main valve core 8 and vice case 16, through setting up of inlet tube 4 and outlet pipe 2, can be connected with between water pump pipeline and the drainage pipe respectively.
The working principle of the utility model is as follows: when a person needs to perform valve closing operation, the valve rod 3 is operated to rotate and move downwards along the surface of the valve casing 1, the adjusting column 7, the main valve core 8, the pressure spring 20 and the auxiliary valve core 16 can be driven to move downwards, under the action of continuous movement, the second wedge groove 15 at the bottom of the auxiliary valve core 16 can be contacted between the second stopper standing alloy rings 22 on the annular sealing seat 23 in advance, and under the pushing of compression tension of the pressure spring 20, the second wedge groove 15 can be tightly attached to the surface of the second stopper standing alloy rings 22, water flow conveyed between the valve casing 1 and the valve seat 9 can be stopped initially, and under the action of continuous movement of the main valve core 8, the first wedge groove 14 at the bottom of the main valve core 8 can be tightly attached to the surface of the first stopper standing alloy rings 21 on the annular sealing seat 23, the effect of double sealing can be achieved in advance, and the surface of the stopper standing alloy rings 21 and the valve seat 9 can be prevented from being damaged due to the fact that the surface of the stopper standing alloy rings 21 is tightly pressed by the surface of the second stopper standing alloy rings 22, the surface of the stopper standing alloy rings can be prevented from being damaged by the valve core 8, and the water flow can be prevented from being damaged due to the long-time can be prevented from being damaged due to the fact that the surface of the stopper standing alloy rings 14 is tightly replaced, and the surface of the stopper sealing groove 14 can be kept in the whole sealing groove is kept in the long-time is kept with the effect of the continuous movement.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can 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.
Claims (7)
1. The utility model provides a minimum flow valve of recirculation for feed pump, includes valve casing (1), its characterized in that, the upper end fixedly connected with disk seat (9) of valve casing (1) inner chamber, the bottom fixedly connected with annular seal seat (23) of disk seat (9) inner chamber, the top of annular seal seat (23) is from outside to interior fixedly connected with first stellite ring (21) and second stellite ring (22) in proper order, the upper end swing joint of disk seat (9) inner chamber has adjusting column (7), the top cover of adjusting column (7) is equipped with valve rod (3), the surface threaded connection of valve rod (3) is in the middle-end at valve casing (1) top, the lower extreme fixedly connected with main valve core (8) of adjusting column (7), the surface swing joint of main valve core (8) is in the middle-end of disk seat (9) inner chamber, the bottom of main valve core (8) is provided with first wedge groove (14), the lower extreme swing joint of main valve core (8) inner chamber has vice case (16), the bottom of vice (16) is provided with vice wedge groove (15), all around the bottom of vice valve core (16) is provided with between the fixed valve core (20) of adjusting column (20) all around.
2. The minimum recirculation flow valve for a water supply pump according to claim 1, wherein a first piston ring (5) is fixedly arranged at the upper end of the adjusting column (7), the surface of the first piston ring (5) is movably connected to the upper end of an inner cavity of the valve seat (9), a first high-temperature fluororubber O-shaped ring (6) is fixedly arranged at the upper end of the adjusting column (7) and below the first piston ring (5), and the surface of the first high-temperature fluororubber O-shaped ring (6) is movably connected to the upper end of the inner cavity of the valve seat (9).
3. The minimum recirculation flow valve for a water supply pump according to claim 1, wherein a second high-temperature fluororubber O-shaped ring (10) is fixedly arranged at the upper end of the outer surface of the main valve core (8), the surface of the second high-temperature fluororubber O-shaped ring (10) is movably connected with the middle end of an inner cavity of the valve seat (9), a second piston ring (11) is fixedly arranged at the lower end of the inner cavity of the valve seat (9), and the outer surface of the main valve core (8) is movably connected with the surface of the second piston ring (11).
4. The minimum recirculation flow valve for a water supply pump according to claim 1, wherein a third high-temperature fluororubber O-shaped ring (17) is fixedly arranged at the middle end of the auxiliary valve core (16), the number of the third high-temperature fluororubber O-shaped rings (17) is two, the surface of the third high-temperature fluororubber O-shaped ring (17) is movably connected with the lower end of an inner cavity of the main valve core (8), a third piston ring (18) is fixedly arranged at the upper end of the auxiliary valve core (16), and the surface of the third piston ring (18) is movably connected with the middle end of the inner cavity of the main valve core (8).
5. The recirculation minimum flow valve for a water supply pump according to claim 1, wherein guide posts (19) are connected to the periphery of the adjusting post (7) in a threaded manner, and the surface of the auxiliary valve core (16) is movably connected to the lower end of the guide posts (19).
6. The recirculation minimum flow valve for a water supply pump according to claim 1, wherein a main pressure regulating sleeve (13) is fixedly connected to the bottom of the outer surface of the valve seat (9), a first pressure regulating hole is formed in the surface of the main pressure regulating sleeve (13), an auxiliary pressure regulating sleeve (12) is fixedly connected to the outer surface of the main pressure regulating sleeve (13), and a second pressure regulating hole is formed in the surface of the auxiliary pressure regulating sleeve (12).
7. The recirculation minimum flow valve for a feed pump according to claim 1, wherein the upper end of the right side of the valve housing (1) is fixedly connected with a water inlet pipe (4), and the lower end of the left side of the valve housing (1) is fixedly connected with a water outlet pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520533546.7U CN223725459U (en) | 2025-03-25 | 2025-03-25 | A recirculation minimum flow valve for a water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520533546.7U CN223725459U (en) | 2025-03-25 | 2025-03-25 | A recirculation minimum flow valve for a water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223725459U true CN223725459U (en) | 2025-12-26 |
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ID=98130362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520533546.7U Active CN223725459U (en) | 2025-03-25 | 2025-03-25 | A recirculation minimum flow valve for a water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223725459U (en) |
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2025
- 2025-03-25 CN CN202520533546.7U patent/CN223725459U/en active Active
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