CN214466234U - Cage type pressure reducing valve - Google Patents
Cage type pressure reducing valve Download PDFInfo
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- CN214466234U CN214466234U CN202120323896.2U CN202120323896U CN214466234U CN 214466234 U CN214466234 U CN 214466234U CN 202120323896 U CN202120323896 U CN 202120323896U CN 214466234 U CN214466234 U CN 214466234U
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Abstract
The utility model discloses a cage type pressure reducing valve, which relates to the valve field and comprises a valve body and the like, wherein an actuating mechanism is fixedly arranged on the valve body; a supporting plate is embedded in the top of the valve body, a valve cover penetrates through the supporting plate and extends into the valve body, and a self-tightening sealing ring is arranged between the valve cover and the valve body to ensure that the valve cover and the valve body are attached and sealed; the valve rod penetrates through the valve cover and extends into a sleeve arranged in the valve body, and a valve clack assembly is also arranged in the sleeve; a valve seat is arranged in the valve body and is respectively in contact sealing with the lower part of the sleeve and the lower part of the valve clack assembly; the lower end of the valve rod is fixedly connected with the valve clack assembly so as to drive the valve clack assembly to move up and down along the sleeve; a plurality of sleeve throttling holes are formed in the throttling surface at the lower part of the sleeve at equal intervals along the length direction of the sleeve; the lower part of the valve clack assembly is provided with a plurality of valve clack throttling holes at equal intervals along the length direction of the valve clack assembly. The utility model has the advantages that: the sealing performance is good, the pressure reduction ratio and the flow rate matching are controllable, the main valve flap and the auxiliary valve flap are balanced, the vibration reduction and noise reduction performance is good, the structure is simple, and the cost performance is high.
Description
Technical Field
The utility model relates to a field of valve, concretely relates to cage formula relief pressure valve.
Background
The steam pressure reducing valve is one of the core components of the temperature and pressure reducing device in the heat and power cogeneration project and the heat and steam supply project, and the quality of the steam pressure reducing valve determines whether the temperature and pressure reducing device can stably, safely, economically and continuously operate. With the development of the 'cogeneration engineering and heating and steam supply engineering' in China, such as the construction of a large-capacity generator set, a megaton-level ethylene engineering, a natural gas engineering, a high-energy nuclear power engineering, a large-scale surface naval vessel and other national important major projects and the development of national defense military industry, the requirements on the temperature and pressure reduction device are continuously expanded, and the performance requirements are higher and higher. Along with the use of large-flow high-parameter units, various large-variable working conditions occur everywhere, and especially under the conditions of high temperature and high pressure, large flow change range, large temperature reduction and pressure reduction amplitude change and high adjustment precision, the requirements of the product on energy consumption performance, safety performance, service life, noise and the like are higher and higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, and provide a cage formula relief pressure valve, have the advantage of high performance (accommodation is big, the precision is high, energy-conserving effectual, long service life), high reliability (safe and reliable).
The purpose of the utility model is accomplished through following technical scheme: the cage type pressure reducing valve comprises a valve body, a valve clack assembly, a valve seat, a sleeve, a valve cover, an actuating mechanism and a valve rod; the valve body is fixedly provided with an actuating mechanism bracket, and an actuating mechanism for connecting a movable valve rod is fixedly arranged on the actuating mechanism bracket; the top of the valve body is embedded with a supporting plate, the valve cover penetrates through the supporting plate and extends into the valve body, the supporting plate and the valve cover are fixedly connected through threads, and a self-tightening sealing ring is arranged between the valve cover and the valve body to enable the valve cover and the valve body to be attached and sealed; the valve rod penetrates through the valve cover and extends into a sleeve arranged in the valve body, a valve clack assembly is further arranged in the sleeve, and a plurality of annular grooves are formed in the outer circle of the valve clack assembly and used for being placed into a guide ring to realize sealing and guiding by matching with the inner wall of the sleeve; a groove for placing the lower opening ring is formed in the valve body above the sleeve, a lower positioning ring is sleeved on the outer wall of the sleeve below the lower opening ring, fastening screws are arranged on two sides of the top of the sleeve, the fastening screws on two sides sequentially penetrate through the lower opening ring and the lower positioning ring to lock and position the sleeve, and the two fastening screws are tightened by stainless steel wires; a valve seat is embedded in the valve body and is respectively in contact sealing with the lower part of the sleeve and the lower part of the valve clack assembly; the lower end of the valve rod is fixedly connected with the valve clack assembly and is used for driving the valve clack assembly to move up and down along the inner wall of the sleeve; a plurality of sleeve throttling holes are arranged on the throttling surface at the lower part of the sleeve at equal intervals along the length direction of the sleeve, so that primary adjustable pressure reduction of the valve seat and valve clack assembly is realized; the lower part of the valve clack assembly is provided with a plurality of valve clack orifices at equal intervals along the length direction of the valve clack assembly, and secondary adjustable decompression of the valve clack assembly and the sleeve is realized.
As a further technical scheme, the valve clack assembly comprises a main valve clack and an auxiliary valve clack arranged in the main valve clack, and a butterfly spring is arranged between the main valve clack and the auxiliary valve clack; the valve rod penetrates through the auxiliary valve clack and is fixedly connected with the main valve clack.
As a further technical scheme, a metal winding pad is arranged at the bottom of the valve seat, so that the valve body is attached and sealed with the valve seat.
As a further technical scheme, the guide ring is made of antimony-added hard graphite materials.
As a further technical scheme, an upper four-in-one ring is embedded in the valve body below the supporting plate, a backing ring is connected to the lower portion of the four-in-one ring in a threaded mode, and the bottom of the backing ring abuts against a self-tightening sealing ring, so that the valve body is tightly attached to the valve cover.
As a further technical scheme, a stroke scale is arranged on the actuating mechanism support and used for indicating the stroke of the valve rod.
As a further technical scheme, the output end of the actuating mechanism is connected and locked with the valve rod through an upper opening-closing nut and a lower opening-closing nut.
As a further technical scheme, a packing groove is formed in the valve cover and used for placing packing, the packing is used for being matched with the valve rod to be in contact sealing, and packing gaskets are arranged at the upper end and the lower end of the packing and used for sealing the packing.
As a further technical scheme, the top of the valve cover is fixedly provided with a packing gland and a packing pressing sleeve through threaded connection and used for pressing and fixing packing and a packing pad.
As a further technical scheme, the top of the valve rod is sleeved with an anti-rotation frame, and the end part of the anti-rotation frame is fixedly arranged on the executing mechanism support and used for preventing the valve rod and the executing mechanism from rotating relatively.
The utility model has the advantages that: the sealing performance is good, the pressure reduction ratio and the flow rate are matched and controllable, the main valve flap and the auxiliary valve flap are balanced, the vibration and noise reduction performance is good, the structure is simple, the cost performance is high, and the energy is saved and the consumption is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the valve comprises a valve body 1, a valve clack assembly 2, a main valve clack 2-1, an auxiliary valve clack 2-2, a belleville spring 2-3, a valve seat 3, a metal winding pad 4, a sleeve 5, a guide ring 6, a lower positioning ring 7, a lower opening ring 8, a fastening screw 9, a stainless steel wire 10, a valve cover 11, a self-tightening sealing ring 12, a backing ring 13, a four-in-one ring 14, a support plate 15, a stroke scale 18, an actuator bracket 19, an actuator 23, an upper opening and closing nut 26, a lower opening and closing nut 27, an anti-rotation bracket 28, a packing gland 32, a packing pressure sleeve 33, packing 37, a packing pad 38, a valve rod 39, a sleeve orifice 40 and a throttle orifice valve clack 41.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
example (b): as shown in fig. 1, the cage type pressure reducing valve comprises a valve body 1, a valve clack assembly 2, a valve seat 3, a sleeve 5, a valve cover 11, an actuating mechanism 23 and a valve rod 39; an actuating mechanism bracket 19 is fixedly connected to the valve body 1 through threads, and an actuating mechanism 23 for connecting a movable valve rod 39 is fixedly connected to the actuating mechanism bracket 19 through threads; a supporting plate 15 is embedded in the top of the valve body 1, the valve cover 11 penetrates through the supporting plate 15 and extends into the valve body 1, the supporting plate 15 and the valve cover 11 are fixedly connected through threads, and a self-tightening sealing ring 12 is arranged between the valve cover 11 and the valve body 1 to enable the valve cover 11 and the valve body 1 to be attached and sealed; the valve rod 39 penetrates through the valve cover 11 and extends into a sleeve 5 arranged in the valve body 1, the valve clack assembly 2 is also arranged in the sleeve 5, and a plurality of annular grooves are formed in the outer circle of the valve clack assembly 2 and used for placing a guide ring 6 and matching with the inner wall of the sleeve 5 to realize sealing and guiding; a groove for placing the lower opening ring 8 is formed in the valve body 1 above the sleeve 5, a lower positioning ring 7 is sleeved on the outer wall of the sleeve 5 below the lower opening ring 8, fastening screws 9 are arranged on two sides of the top of the sleeve 5, the fastening screws 9 on two sides sequentially penetrate through the lower opening ring 8 and the lower positioning ring 7 to lock and position the sleeve 5, and the two fastening screws 9 are tightened by stainless steel wires 10; a valve seat 3 is embedded in the valve body 1, and the valve seat 3 is respectively in contact sealing with the lower part of the sleeve 5 and the lower part of the valve clack assembly 2; the lower end of the valve rod 39 is fixedly connected with the valve clack assembly 2 and is used for driving the valve clack assembly 2 to move up and down along the inner wall of the sleeve 5; a plurality of sleeve throttling holes 40 are formed in the throttling surface at the lower part of the sleeve 5 at equal intervals along the length direction of the throttling surface, so that primary adjustable pressure reduction of the valve seat 3 and the valve clack assembly 2 is realized; the lower part of the valve clack assembly 2 is provided with a plurality of valve clack throttling holes 41 at equal intervals along the length direction of the valve clack assembly, and secondary adjustable decompression of the valve clack assembly 2 and the sleeve 5 is realized.
Preferably, the valve clack assembly 2 comprises a main valve clack 2-1 and an auxiliary valve clack 2-2 arranged in the main valve clack 2-1, and a butterfly spring 2-3 is arranged between the main valve clack 2-1 and the auxiliary valve clack 2-2; the valve rod 39 penetrates through the auxiliary valve clack 2-2 and is fixedly connected with the main valve clack 2-1. The unbalanced force of the valve during opening, closing and running is effectively reduced, the power of an actuating mechanism is reduced, and the cost performance of the valve is improved. And a metal winding pad 4 is arranged at the bottom of the valve seat 3, so that the valve body 1 and the valve seat 3 are attached and sealed. The guide ring 6 is made of antimony-added hard graphite material, has the characteristics of small vibration, low noise and the like, and has the overall noise level lower than 85dB (A).
Furthermore, an upper four-in-one ring 14 is embedded in the valve body 1 below the supporting plate 15, a backing ring 13 is connected to the lower portion of the four-in-one ring 14 in a threaded manner, and the bottom of the backing ring 13 abuts against the self-tightening sealing ring 12, so that the valve body 1 is tightly attached to the valve cover 11.
The actuator support 19 is provided with a stroke scale 18 for indicating the stroke of the valve rod 39. The output end of the actuating mechanism 23 is connected and locked with the valve rod 39 through the upper opening and closing nut 26 and the lower opening and closing nut 27. The top of the valve rod 39 is sleeved with an anti-rotation frame 28, and the end part of the anti-rotation frame 28 is fixedly arranged on the executing mechanism bracket 19 and used for preventing the valve rod 39 and the executing mechanism 23 from rotating relatively.
The valve cover 11 is internally provided with a packing groove for placing a packing 37, the packing 37 is used for being matched with a valve rod 39 to be in contact sealing, and packing gaskets 38 are arranged at the upper end and the lower end of the packing 37 and used for sealing the packing 37. The top of the valve cover 11 is fixedly provided with a packing gland 32 and a packing gland 33 through threaded connection, and the packing gland are used for compressing and fixing packing 37 and a packing pad 38.
The utility model discloses a change the mode of the position of valve clack to change runner restriction area, make steam adiabatic expansion finally reduce the control valve of steam pressure in valve runner. When the pressure reducing valve operates, a series of signals are transmitted into the DSC system through the pressure transmitter and the regulator, and then the DSC system operates the actuating mechanism to drive the valve clack, so that the valve clack moves up and down in the valve seat (sleeve) to change the flow area of a medium to change the flow. The new steam enters the upper cavity of the valve through the steam inlet pipe, when the valve clack moves up and down, the steam flows downwards through the sleeve passage and enters the middle and lower steam cavities, the relative position of the steam in the sleeve and the valve seat is adjusted through the valve clack, and the flow area of the sleeve is controlled, so that the flow area of the medium is changed to achieve the purposes of throttling and pressure reduction.
Generally speaking, the utility model discloses following technological effect has:
1. the valve body and the valve cover adopt forged pieces, so that the structure is compact and the pressure resistance is good;
2. the sealing performance is good, namely a single-seat sealing structure is adopted, the leakage rate is low, and the sealing performance is good;
3. the valve can be designed into equal percentage flow characteristic, compared with linear flow characteristic, the valve position is larger with the same flow, and the requirement of regulating performance in small flow can be met;
4. the pressure reduction ratio and the flow rate are matched and controllable, namely, the adjustable pressure reduction of more than two stages in the valve is completed by taking the porous pressure reduction and noise reduction as concepts and combining the throttling stage number of the cage cover, so that the relative low speed of the small pressure reduction ratio under the working condition of high speed and small flow is realized, and the pressure reduction precision and the noise reduction effect of less than +/-0.15 MPa are obtained;
5. the main and auxiliary balance valve clacks are developed according to the balance principle, so that the unbalanced force of the action of the valve during opening, closing and running is effectively reduced, the power of an actuating mechanism is reduced, and the cost performance of the valve is improved;
6. the wood sealing structure is developed and developed metal elastic wood sealing which is used for the combined connection of the body and the cover and can effectively improve the service life and the reliability of the body cover sealing of the valve under the ultrahigh pressure working condition;
7. damping and reducing noise, wherein an NY series pressure reducing valve is adopted to pass through a design concept of a multi-stage cage cover and a small throttling hole, a valve clack guide ring adopts antimony-added hard graphite, and the valve clack guide ring has the characteristics of small vibration, low noise and the like, and the overall noise level is lower than 85dB (A);
8. the structure is simple, the whole set of equipment has simple structure, good processing manufacturability and easy guarantee of processing quality;
9. the structure has good temperature and pressure reduction effect, high working reliability, good sealing performance and low production and manufacturing cost, not only ensures the use effect of the temperature and pressure reduction device, but also has high cost performance;
10. the energy saving and consumption reduction, namely a high-parameter temperature and pressure reduction process technology of reducing pressure and then reducing temperature and a split type temperature and pressure reduction structure thereof are adopted, wherein the temperature and pressure reduction process is stable, the alternating stress level borne by the structure is low, the energy loss in the process is small, and the requirements of safe operation, energy saving and consumption reduction of products under the working condition of high parameter (the pressure is less than or equal to 14MPa and the temperature is less than or equal to 560 ℃) are met;
11. the device has advanced level, adopts a two-stage pressure reduction technology and structure of the sleeve porous throttling mesh enclosure, and has low alternating stress level, large steam flow regulation range, high pressure regulation precision and low noise caused under the condition of large pressure reduction amplitude (pressure reduction ratio). Compared with the existing domestic and foreign pressure reduction technology and structure, the pressure reduction technology and structure all reach or are higher than the advanced level of the similar products at home and abroad.
It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.
Claims (10)
1. A caged pressure relief valve characterized by: the valve comprises a valve body (1), a valve clack assembly (2), a valve seat (3), a sleeve (5), a valve cover (11), an actuating mechanism (23) and a valve rod (39); an actuating mechanism bracket (19) is fixedly arranged on the valve body (1), and an actuating mechanism (23) for connecting a movable valve rod (39) is fixedly arranged on the actuating mechanism bracket (19); a supporting plate (15) is embedded into the top of the valve body (1), the valve cover (11) penetrates through the supporting plate (15) and extends into the valve body (1), the supporting plate (15) and the valve cover (11) are fixedly connected through threads, and a self-tightening sealing ring (12) is arranged between the valve cover (11) and the valve body (1) to enable the valve cover (11) and the valve body (1) to be attached and sealed; the valve rod (39) penetrates through the valve cover (11) and extends into a sleeve (5) arranged in the valve body (1), a valve clack assembly (2) is further arranged in the sleeve (5), a plurality of annular grooves are formed in the outer circle of the valve clack assembly (2) and used for being placed into the guide ring (6), and sealing and guiding are achieved by matching with the inner wall of the sleeve (5); a groove for placing the lower opening ring (8) is formed in the valve body (1) above the sleeve (5), a lower positioning ring (7) is sleeved on the outer wall of the sleeve (5) below the lower opening ring (8), fastening screws (9) are arranged on two sides of the top of the sleeve (5), the fastening screws (9) on two sides sequentially penetrate through the lower opening ring (8) and the lower positioning ring (7) to lock and position the sleeve (5), and the two fastening screws (9) are tightened by stainless steel wires (10); a valve seat (3) is embedded in the valve body (1), and the valve seat (3) is respectively in contact sealing with the lower part of the sleeve (5) and the lower part of the valve clack assembly (2); the lower end of the valve rod (39) is fixedly connected with the valve clack assembly (2) and is used for driving the valve clack assembly (2) to move up and down along the inner wall of the sleeve (5); a plurality of sleeve throttling holes (40) are formed in the throttling surface at the lower part of the sleeve (5) at equal intervals along the length direction of the throttling surface, so that primary adjustable pressure reduction of the valve seat (3) and the valve clack assembly (2) is realized; the lower part of the valve clack assembly (2) is provided with a plurality of valve clack orifices (41) at equal intervals along the length direction of the valve clack assembly, so that two-stage adjustable pressure reduction of the valve clack assembly (2) and the sleeve (5) is realized.
2. The caged pressure relief valve as defined in claim 1 wherein: the valve clack assembly (2) comprises a main valve clack (2-1) and an auxiliary valve clack (2-2) arranged in the main valve clack (2-1), and a butterfly spring (2-3) is arranged between the main valve clack (2-1) and the auxiliary valve clack (2-2); the valve rod (39) penetrates through the auxiliary valve clack (2-2) and is fixedly connected with the main valve clack (2-1).
3. The caged pressure relief valve as defined in claim 1 wherein: and a metal winding pad (4) is arranged at the bottom of the valve seat (3), so that the valve body (1) is attached and sealed with the valve seat (3).
4. The caged pressure relief valve as defined in claim 1 wherein: the guide ring (6) is made of a hard graphite material added with antimony.
5. The caged pressure relief valve as defined in claim 1 wherein: an upper four-in-one ring (14) is embedded in the valve body (1) below the supporting plate (15), a backing ring (13) is connected to the lower portion of the four-in-one ring (14) in a threaded mode, and the bottom of the backing ring (13) abuts against the self-tightening sealing ring (12) so that the valve body (1) is tightly attached to the valve cover (11).
6. The caged pressure relief valve as defined in claim 1 wherein: and a stroke scale (18) is arranged on the actuating mechanism bracket (19) and is used for indicating the stroke of the valve rod (39).
7. The caged pressure relief valve as defined in claim 1 wherein: the output end of the actuating mechanism (23) is connected and locked with the valve rod (39) through an upper opening and closing nut (26) and a lower opening and closing nut (27).
8. The caged pressure relief valve as defined in claim 1 wherein: the valve cover (11) is internally provided with a packing groove for placing packing (37), the packing (37) is used for being matched with a valve rod (39) to be in contact sealing, and packing gaskets (38) are arranged at the upper end and the lower end of the packing (37) and used for sealing the packing (37).
9. The caged pressure relief valve as defined in claim 8 wherein: the top of the valve cover (11) is fixedly provided with a packing gland (32) and a packing gland sleeve (33) through threaded connection and used for compressing and fixing packing (37) and a packing pad (38).
10. The caged pressure relief valve as defined in claim 1 wherein: the top of the valve rod (39) is sleeved with an anti-rotation frame (28), and the end part of the anti-rotation frame (28) is fixedly arranged on the executing mechanism support (19) and used for preventing the valve rod (39) and the executing mechanism (23) from rotating relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120323896.2U CN214466234U (en) | 2021-02-04 | 2021-02-04 | Cage type pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120323896.2U CN214466234U (en) | 2021-02-04 | 2021-02-04 | Cage type pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214466234U true CN214466234U (en) | 2021-10-22 |
Family
ID=78118214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120323896.2U Active CN214466234U (en) | 2021-02-04 | 2021-02-04 | Cage type pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214466234U (en) |
-
2021
- 2021-02-04 CN CN202120323896.2U patent/CN214466234U/en active Active
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