CN111750123A - Valve core assembly and regulating valve suitable for high-temperature working condition - Google Patents
Valve core assembly and regulating valve suitable for high-temperature working condition Download PDFInfo
- Publication number
- CN111750123A CN111750123A CN201910251156.XA CN201910251156A CN111750123A CN 111750123 A CN111750123 A CN 111750123A CN 201910251156 A CN201910251156 A CN 201910251156A CN 111750123 A CN111750123 A CN 111750123A
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- valve core
- ring
- valve
- graphite
- working condition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
Abstract
The invention belongs to the valve technology, and particularly relates to a valve core assembly suitable for high-temperature working conditions and a regulating valve with the valve core assembly. The valve core comprises a valve core, the section of the valve core is of an inverted convex structure, a through hole with a Y-shaped section is formed in the valve core, two channels at the upper part of the through hole are communicated with the top surface of the valve core, one channel at the lower part of the through hole extends to the bottom surface of the valve core, four parallel annular grooves are formed in the upper half part of the valve core, a graphite ring integral assembly is arranged in each annular groove, and the lower valve core is sleeved on the lower half part of the valve core. The invention has the following remarkable effects: in the working process of the regulating valve, the valve core, the lower valve core and the cage sleeve are arranged in reasonable gaps, the guide ring is in contact with the cage sleeve, the spring provides contact force, the phenomenon that the valve core, the lower valve core, the graphite ring and the cage sleeve are deformed inconsistently to block under the high-temperature working condition is avoided, and dynamic guiding of the valve core and the lower valve core is realized. The valve operating force is reduced, and the adjusting precision is improved.
Description
Technical Field
The invention belongs to the valve technology, and particularly relates to a valve core assembly suitable for high-temperature working conditions and a regulating valve with the valve core assembly.
Background
In industries such as nuclear power, petrochemical industry, coal chemical industry, hydroelectric power and the like, a large number of regulating valves are widely arranged, and the regulating valves have the functions of regulating medium pressure, flow, temperature and the like. The regulation precision, the inherent flow characteristic, the anti-vibration capability and the like are important indexes for evaluating the performance of the regulating valve. The design of the clearance control and guide structure between the valve core and the cage sleeve is closely related to the evaluation indexes. Under the high-temperature working condition of a valve core of a regulating valve in the industry, phenomena of jamming, increase of valve operating force, even breakage of a valve rod and the like often occur due to inconsistent high-temperature expansion amounts of the valve core, a graphite ring and a cage sleeve, and the regulating precision and the service life of the regulating valve are seriously influenced.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a valve core assembly suitable for high-temperature working conditions and a regulating valve with the valve core assembly.
The invention is realized by the following steps: a valve core assembly suitable for high-temperature working conditions is characterized in that the section of a valve core is of an inverted convex structure, a through hole with a Y-shaped section is formed in the valve core, two channels at the upper part of the through hole are communicated with the top surface of the valve core, one channel at the lower part of the through hole extends to the bottom surface of the valve core, four parallel annular grooves are formed in the upper half part of the valve core, a graphite ring integral assembly is arranged in each annular groove, and a lower valve core is sleeved on the lower half part of the valve core.
The valve core assembly suitable for the high-temperature working condition is characterized in that the side wall of the lower valve core is provided with the annular groove b, the annular groove b is provided with the spring supporting hole b, the annular groove b is provided with the guide ring, and the spring is arranged in the spring supporting hole b.
The valve core assembly suitable for the high-temperature working condition is characterized in that the four parallel annular grooves on the valve core are in the following structure, the section of each parallel annular groove is in a laterally arranged convex shape, the top end of each convex shape is a spring support hole a, and the bottom end of each convex shape is an annular groove a.
The valve core assembly suitable for the high-temperature working condition comprises a graphite ring assembly, a spring arranged between the graphite ring assembly and the valve core, a guide ring arranged outside the graphite ring assembly, and a spring support hole a, wherein the guide ring and the graphite ring assembly are arranged in an annular groove a together.
The valve core assembly suitable for the high-temperature working condition is characterized in that the valve rod is arranged at the top end of the valve core, the cage is arranged on the periphery of the upper half part of the valve core, the valve seat is arranged on the periphery of the lower valve core, and the gasket is arranged between the cage and the valve seat.
The valve core assembly suitable for the high-temperature working condition is characterized in that the top end of the valve core is provided with the square groove a.
The valve core assembly suitable for the high-temperature working condition is characterized in that the top end of the lower valve core is provided with a square groove b.
The valve core assembly suitable for the high-temperature working condition is characterized in that the lower valve core is provided with an orifice.
The valve core assembly suitable for the high-temperature working condition is characterized in that the graphite ring assembly is of a two-layer structure which is annularly arranged, the outer layer is a graphite ring, and the inner layer is a support ring.
The valve core assembly suitable for the high-temperature working condition is characterized in that the graphite ring is formed by splicing a plurality of arc-shaped graphite rings a and a plurality of arc-shaped graphite rings b, and the support ring is formed by splicing a plurality of arc-shaped support rings a and a plurality of arc-shaped support rings b.
The valve core assembly suitable for the high-temperature working condition is characterized in that each of the support rings a and b is provided with a spring support hole c.
The valve core assembly suitable for the high-temperature working condition is characterized in that the surface, facing the graphite ring, of each support ring a and the surface, facing the graphite ring, of each support ring b are provided with protrusions, the surface, facing the support ring, of each graphite ring a and the surface, facing the support ring, of each graphite ring b are provided with grooves, and the protrusions and the grooves are matched.
The valve core assembly suitable for the high-temperature working condition is characterized in that the arc included angle of each support ring a is 100 degrees, the arc included angle of each support ring b is 80 degrees, and the two support rings a and the two support rings b are spliced into one support ring.
The valve core assembly suitable for the high-temperature working condition is characterized in that the arc included angle of each graphite ring a is 90 degrees, the arc included angle of each graphite ring b is 90 degrees, and the two graphite rings a and the two graphite rings b are spliced into one graphite ring.
The valve core assembly suitable for the high-temperature working condition is characterized in that the guide ring is formed by splicing four arc-shaped guide ring parts with the same shapes, a plurality of spring support holes d are formed in the inner wall of the guide ring, and the outer surface of the guide ring is a hardened layer.
A valve core suitable for high-temperature working conditions comprises a valve body, wherein a cavity is formed in the valve body, a valve cover is arranged on the valve body, and a valve core assembly as claimed in any one of claims 1 to 15 is arranged in the valve body.
The invention has the following remarkable effects: in the working process of the regulating valve, the valve core, the lower valve core and the cage sleeve are arranged in reasonable gaps, the guide ring is in contact with the cage sleeve, the spring provides contact force, the phenomenon that the valve core, the lower valve core, the graphite ring and the cage sleeve are deformed inconsistently to block under the high-temperature working condition is avoided, and dynamic guiding of the valve core and the lower valve core is realized. The valve operating force is reduced, and the adjusting precision is improved.
Drawings
FIG. 1 is a schematic view of a control valve cartridge assembly of the present invention adapted for use in high temperature conditions.
FIG. 2 is a schematic view of the valve core assembly in cooperation with the cage and the valve seat.
Fig. 2a is a partially enlarged schematic view of the valve core and cage at the mating position.
Fig. 2b is a partially enlarged schematic view of the position where the lower valve core is matched with the cage.
Fig. 3 is an axial side sectional view of the valve cartridge.
Fig. 4 is an axial side sectional view of the lower core.
Figure 5 is a schematic view of a graphite ring assembly.
Figure 5a is a schematic view of a first component of a graphite ring assembly.
Figure 5b is a schematic view of part two of the graphite ring assembly.
Fig. 6 is a schematic view of a guided four-open loop.
Fig. 7 is a front view of the regulator valve.
In the figure: 10. valve core, 11, balance hole, 12, annular groove a, 13, spring support hole a, 14, square groove a, 20, graphite ring assembly, 21 graphite ring a, 22 support ring a, 23 graphite ring b, 24 support ring b, 25 spring support hole c, 201 graphite ring assembly part one, 202 graphite ring assembly part two, 30, spring, 40, guide ring, 41, spring support hole d, 42, hardened layer, 50, lower valve core, 51, orifice hole, 52, annular groove b, 53, spring support hole b, 54, square groove b, 60, valve rod, 70, cage, 80, valve seat, 90, gasket, 100, valve cover, 110, valve body, 120, stud, 130, nut.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1, the valve core assembly suitable for high-temperature operating conditions provided by the invention comprises a valve core 10, a graphite ring assembly 20, a spring 30, a guide ring 40 and a lower valve core 50.
As shown in fig. 1-4, 2a and 2b, the graphite ring assembly 20 is nested in the annular groove a 12 of the valve core 10, and the spring 30 supports the graphite ring assembly 20 such that the graphite ring assembly 20 is in contact with the inner wall of the cage 70. The guide ring 40 is nested in the annular groove a of the valve core 10, and the spring 30 supports the guide ring 40 so that the guide ring 40 is in contact with the inner wall of the cage 70.
As shown in fig. 3, the valve body 10 has a balance hole 11, an annular groove a 12, a spring support hole a 13, and a square groove a 14. The number of the annular grooves a 12 is four, eight spring supporting holes a 13 are uniformly distributed in a single annular groove a 12, and the square grooves a 14 are uniformly distributed along the circumferential direction and are eight in number and are positioned at the guide position of the upper end of the valve core 10. When the diameter D1 of the upper end of the valve core 10 is between 50 mm and 100 mm, the size m of the square groove a 14 is 6 mm; when the D1 is between 100 mm and 200 mm, the size m of the square groove a 14 is 10 mm, and when the D1 is more than 200 mm, the size m of the square groove a 14 is 20 mm.
As shown in fig. 4, the lower valve body 50 has an orifice 51, an annular groove b 53, and a square groove b 54. Eight spring supporting holes b 53 are uniformly distributed in the annular groove b 53, and the square grooves a 54 are positioned at the guide position of the upper end of the lower valve core 50 and are uniformly distributed along the circumferential direction, and the number of the square grooves is eight. When the diameter D2 of the upper end of the lower valve core 50 is between 50 mm and 100 mm, the size n of the square groove b 54 is 6 mm; when the D2 is between 100 mm and 200 mm, the size n of the square groove b 54 is 10 mm, and when the D2 is more than 200 mm, the size n of the square groove b 54 is 20 mm.
As shown in fig. 5, 5a and 5b, the graphite ring assembly 20 is comprised of a graphite ring assembly part one 201 and a graphite ring assembly part one 202.
As shown in fig. 5a, the first graphite ring assembly part 201 is composed of a graphite ring a 21 and a support ring a 22, the angle of the graphite ring a 21 is 90 degrees, the angle of the support ring a 22 is 100 degrees, and three spring support holes c 25 are uniformly distributed in the support ring a 22.
As shown in fig. 5b, the second graphite ring assembly component 202 is composed of a graphite ring b 23 and a support ring b 24, the angle of the graphite ring b 23 is 90 °, the angle of the support ring b 24 is 90 °, and a spring support hole c 25 is located at the central symmetry position inside the support ring b 24.
As shown in FIG. 6, the guide ring is a four-ring equally-divided structure, the inner ring of the guide ring is provided with a spring supporting hole d, the outer peripheral surface of the guide ring is provided with a hardened layer, and the hardness of the hardened layer is more than or equal to 60 HRC.
As shown in fig. 7, the regulating valve mainly comprises a valve core 10, a graphite ring assembly 20, a spring 30, a guide ring 40, a lower valve core 50, a valve rod 60, a cage 70, a valve seat 80, a gasket 90, a valve cover 100, a valve body 110, a stud 120 and a nut 130.
The specific working process of the invention is as follows:
the valve core 10 and the cage 70 are in clearance fit, and the valve core and the cage are ensured not to contact under a high-temperature working condition. The guide ring 40 is supported by the spring 30 so that the outer circumference of the guide ring 40 is in contact fit with the inner circumference of the cage 70, thereby guiding the auxiliary valve element 10. The compressible nature of the spring 30 compensates for the amount of deflection of the guide ring 40 and cage 70 during high temperature conditions.
The lower valve core 50 and the cage 70 are in clearance fit, and the lower valve core and the cage are ensured not to contact under a high-temperature working condition. The guide ring 40 is supported by the spring 30 so that the outer periphery of the guide ring 40 is in contact fit with the inner ring of the cage 70, thereby guiding the lower valve core 50. The compressible nature of the spring 30 compensates for the amount of deflection of the guide ring 40 and cage 70 during high temperature conditions.
The graphite ring assembly 20 is in contact fit with the cage 70, and the compressible characteristic of the spring 30 can compensate the deformation of the graphite ring assembly 20 and the cage 70 under the high-temperature working condition.
Therefore, in the working process of the regulating valve, the guide ring 40, the graphite ring assembly 20 and the cage 70 are in dynamic contact all the time, so that the functions of guiding and sealing are achieved, and the high-temperature expansion blocking condition of the guide ring 40 and the graphite ring assembly is avoided.
The foregoing detailed description is intended to illustrate and not limit the invention, which is intended to be within the spirit and scope of the appended claims, and any changes and modifications that fall within the true spirit and scope of the appended claims.
Claims (16)
1. The utility model provides a case subassembly suitable for high temperature operating mode which characterized in that: the cross section of the valve core (10) is of an inverted convex structure, a through hole with a Y-shaped cross section is formed in the valve core (10), two channels at the upper part of the through hole are communicated with the top surface of the valve core (10), one channel at the lower part of the through hole extends to the bottom surface of the valve core (10), four parallel annular grooves are formed in the upper half part of the valve core (10), a graphite ring integral assembly is arranged in each annular groove, and a lower valve core (50) is sleeved on the lower half part of the valve core (10).
2. The valve core assembly suitable for the high-temperature working condition according to claim 1, wherein: an annular groove b (52) is formed in the side wall of the lower valve core (50), a spring supporting hole b (53) is formed in the annular groove b (52), a guide ring (40) is arranged in the annular groove b (52), and a spring (30) is arranged in the spring supporting hole b (53).
3. The valve core assembly suitable for the high-temperature working condition according to claim 2, wherein: the four parallel annular grooves on the valve core (10) are structurally characterized in that the section of each parallel annular groove is in a laterally-arranged convex shape, the top end of the convex shape is a spring support hole a (13), and the bottom end of the convex shape is an annular groove a (12).
4. The valve core assembly suitable for the high-temperature working condition according to claim 3, wherein: the graphite ring integral assembly comprises a graphite ring assembly (20), a spring (30) arranged between the graphite ring assembly (20) and the valve core (10), wherein the spring (30) is arranged in a spring supporting hole a (13), and a guide ring (40) arranged outside the graphite ring assembly (20), and the guide ring (40) and the graphite ring assembly (20) are jointly arranged in an annular groove a (12).
5. The valve core assembly suitable for the high-temperature working condition according to claim 4, wherein: the top end of the valve core (10) is provided with a valve rod (60), the periphery of the upper half part of the valve core (10) is provided with a cage sleeve (70), the periphery of the lower valve core (50) is provided with a valve seat (80), and a gasket (90) is arranged between the cage sleeve (70) and the valve seat (80).
6. The valve core assembly suitable for the high-temperature working condition according to claim 5, wherein: a square groove a (14) is provided at the tip of the valve element (10).
7. The valve core assembly suitable for the high-temperature working condition according to claim 5, wherein: the top end of the lower valve core (50) is provided with a square groove b (54).
8. The valve core assembly suitable for the high-temperature working condition according to claim 5, wherein: an orifice (51) is opened on the lower valve core (50).
9. The valve core assembly suitable for the high-temperature working condition according to claim 5, wherein: the graphite ring assembly (20) is of a two-layer structure which is annularly arranged, the outer layer is a graphite ring, and the inner layer is a support ring.
10. The valve core assembly suitable for high-temperature working conditions of claim 9, wherein: the graphite ring is formed by splicing a plurality of arc-shaped graphite rings a (21) and b (23), and the support ring is formed by splicing a plurality of arc-shaped support rings a (22) and b (24).
11. The valve core assembly suitable for high-temperature conditions of claim 10, wherein: each of the support rings a (22) and b (24) is provided with a spring support hole c (25).
12. The valve core assembly suitable for high temperature conditions of claim 11, wherein: the surfaces of the support rings a (22) and b (24) facing the graphite ring are provided with protrusions, the surfaces of the graphite rings a (21) and b (23) facing the support rings are provided with grooves, and the protrusions and the grooves are matched.
13. The valve core assembly suitable for high temperature conditions of claim 11, wherein: the arc included angle of each support ring a (22) is 100 degrees, the arc included angle of each support ring b (24) is 80 degrees, and the two support rings a (22) and the two support rings b (24) are spliced into one support ring.
14. The valve core assembly suitable for high temperature conditions of claim 11, wherein: the arc included angle of each graphite ring a (21) is 90 degrees, the arc included angle of each graphite ring b (23) is 90 degrees, and the two graphite rings a (21) and the two graphite rings b (23) are spliced into a graphite ring.
15. The valve core assembly suitable for the high-temperature working condition according to claim 4, wherein: the guide ring (40) is formed by splicing four arc-shaped guide ring parts with the same shape, a plurality of spring support holes d (41) are formed in the inner wall of the guide ring (40), and the outer surface of the guide ring (40) is a hardened layer (42).
16. The utility model provides a case suitable for high temperature operating mode which characterized in that: the valve core assembly comprises a valve body (110), wherein a cavity is formed in the valve body (110), a valve cover (100) is arranged on the valve body (110), and the valve core assembly as claimed in any one of claims 1 to 15 is arranged in the valve body (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251156.XA CN111750123A (en) | 2019-03-29 | 2019-03-29 | Valve core assembly and regulating valve suitable for high-temperature working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251156.XA CN111750123A (en) | 2019-03-29 | 2019-03-29 | Valve core assembly and regulating valve suitable for high-temperature working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111750123A true CN111750123A (en) | 2020-10-09 |
Family
ID=72671714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910251156.XA Pending CN111750123A (en) | 2019-03-29 | 2019-03-29 | Valve core assembly and regulating valve suitable for high-temperature working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111750123A (en) |
-
2019
- 2019-03-29 CN CN201910251156.XA patent/CN111750123A/en active Pending
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