CN216715298U - Flow pressure regulation control distribution valve - Google Patents
Flow pressure regulation control distribution valve Download PDFInfo
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- CN216715298U CN216715298U CN202220166583.5U CN202220166583U CN216715298U CN 216715298 U CN216715298 U CN 216715298U CN 202220166583 U CN202220166583 U CN 202220166583U CN 216715298 U CN216715298 U CN 216715298U
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Abstract
The utility model provides a flow pressure regulation control distribution valve, which comprises a lower valve cover assembly and other components, wherein the upper part of a valve body is fixedly connected with a valve cover, the valve cover is fixedly connected with an actuating mechanism through a support, and the lower part of the valve body is fixedly connected with the lower valve cover assembly; the sleeve is provided with a throttling hole A, the sleeve is internally and slidably connected with an upper valve clack, and the upper valve clack is in matched connection with an upper valve seat; a throttling hole B is formed in the lower valve clack, one end of the valve rod is connected with the executing mechanism, the other end of the valve rod is fixedly connected with the lower valve clack, and the middle position of the valve rod is fixedly connected with the upper valve clack; when the valve stem is moved to place the plurality of orifices a in a fully closed state, the orifices B are in a fully open state. The utility model has the beneficial effects that: the stroke of the upper valve clack and the stroke of the lower valve clack are synchronous, the sleeve plunger with the conical surface seal is in combined throttling, the steam medium entering the shaft seal is subjected to primary pressure reduction, the steam medium entering the condenser is subjected to secondary pressure reduction, and stable adjustment and control of parameters such as pressure, flow and the like of steam for steam seal are realized.
Description
Technical Field
The utility model relates to a regulating valve, in particular to a flow pressure regulating control distribution valve.
Background
The shaft seal steam system has the main functions of providing steam seal for the shaft seal of the steam turbine and reasonably guiding and extracting the leaked steam of each steam seal. In order to prevent steam from leaking outwards and air from leaking inwards. It is important to be able to provide scientifically and reasonably the steam pressure and flow rate for sealing and to achieve a controlled distribution of flow and pressure. If the valve can not ensure the pressure and flow of steam for shaft seal along with the change of working condition parameters, the operation efficiency is low, and the safe operation of the steam turbine is influenced.
Because traditional governing valve can not realize carrying out pressure regulation and flow distribution to entry steam simultaneously, can't realize effectively supplying vapour, influence steam turbine safe operation. Therefore, it is very important to develop a steam flow pressure regulating control distribution valve.
SUMMERY OF THE UTILITY MODEL
In order to meet the requirements of shaft seal steam pressure and flow, the utility model aims to overcome the defects in the prior art and provide a flow pressure regulation control distribution valve.
The object of the present invention is achieved by the following technical means. A flow pressure regulation control distribution valve comprises a lower valve cover assembly, a lower valve clack, a lower valve seat, a valve body, an upper valve seat, an upper valve clack, a sleeve, a valve cover, a valve rod, a support and an actuating mechanism, wherein the upper part of the valve body is fixedly connected with the valve cover which is fixedly connected with the actuating mechanism through the support, and the lower part of the valve body is fixedly connected with the lower valve cover assembly;
the valve body is provided with a medium inflow cavity and a first medium outflow cavity, an upper valve seat is arranged on the valve body at the communication position of the medium inflow cavity and the first medium outflow cavity, a sleeve connected with the upper valve seat is arranged in the medium inflow cavity, a plurality of throttling holes A are formed in the sleeve along the height direction, an upper valve clack is connected in the sleeve in a sliding mode, and the upper valve clack is connected with the upper valve seat in a matching mode;
a second medium outflow cavity is formed in the lower valve cover assembly, a lower valve seat is hermetically connected at the communication position of the first medium outflow cavity and the second medium outflow cavity, a plurality of orifices B are formed in the lower valve clack in the height direction, and the lower valve clack used for opening and closing the orifices B is slidably connected to the lower valve seat;
one end of the valve rod is connected with the actuating mechanism, the other end of the valve rod is fixedly connected with the lower valve clack, and the middle position of the valve rod is fixedly connected with the upper valve clack; the strokes of the upper valve clack and the lower valve clack are synchronous, and when the valve rod moves to enable the plurality of throttling holes A to be in a fully closed state, the throttling holes B are in a fully communicated state.
Furthermore, when the plurality of orifices A are in a completely closed state, the upper valve clack and the upper valve seat form a conical surface sealing structure.
Furthermore, a guide ring is arranged at the matching part of the upper valve clack and the inner wall of the sleeve.
Furthermore, the inlet communicated with the medium inflow cavity and the outlet communicated with the first medium outflow cavity are coaxially arranged.
Furthermore, an inner hole is formed in one end of the lower valve clack, a tapered hole is formed in the other end of the lower valve clack, a step is arranged at the joint of the inner hole and the tapered hole, one end, containing the inner hole, of the lower valve clack is in sliding fit with the bottom hole of the lower valve seat, the inner hole is communicated with the first medium outflow cavity, and the inner hole is communicated with the second medium outflow cavity through a throttling hole B.
The utility model has the beneficial effects that: the sleeve and plunger combined throttling structure with synchronous stroke and conical surface sealing of the upper valve clack and the lower valve clack is developed and designed, the sleeve is provided with a throttling hole A, and the lower valve clack is also provided with a throttling hole B for throttling. And the steam medium entering the shaft seal system is subjected to primary pressure reduction, and the steam medium entering the condenser is subjected to secondary pressure reduction. The steam seal device can be controlled by an electric, pneumatic, hydraulic or electro-hydraulic linkage actuating mechanism, so that stable regulation and control of parameters such as pressure, flow and the like of steam for steam seal are realized.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of fig. 1 at D.
Fig. 3 is a partially enlarged schematic view at E of fig. 1.
Description of reference numerals: the valve comprises a lower valve cover assembly 1, a second medium outflow cavity 1-1, a lower valve clack 2, an orifice B2-1, an inner hole 2-2, a step 2-3, a tapered hole 2-4, a lower valve seat 3, a valve body 4, a medium inflow cavity 4-1, a first medium outflow cavity 4-2, an upper valve seat 5, an upper valve clack 6, a guide ring 7, a sleeve 8, an orifice A8-1, a valve cover 9, a valve rod 10, a support 11 and an actuating mechanism 12.
Detailed Description
The utility model will be described in detail below with reference to the following drawings:
as shown in fig. 1-3, a flow pressure regulating control distribution valve comprises a lower valve cover assembly 1, a lower valve clack 2, a lower valve seat 3, a valve body 4, an upper valve seat 5, an upper valve clack 6, a sleeve 8, a valve cover 9, a valve rod 10, a support 11 and an actuating mechanism 12, wherein the valve body 4 adopts an integral casting full-flow structure, the upper part of the valve body 4 is fixedly connected with the valve cover 9, the valve cover 9 is fixedly connected with the actuating mechanism 12 through the support 11, and the lower part of the valve body 4 is fixedly connected with the lower valve cover assembly 1;
the valve body 4 is provided with a medium inflow cavity 4-1 and a first medium outflow cavity 4-2, and an inlet communicated with the medium inflow cavity 4-1 and an outlet communicated with the first medium outflow cavity 4-2 are coaxially arranged (a main runner horizontally enters and horizontally exits to reduce runner resistance and vibration). An upper valve seat 5 is arranged on a valve body 4 at the communication part of a medium inflow cavity 4-1 and a first medium outflow cavity 4-2, a sleeve 8 connected with the upper valve seat 5 is arranged in the medium inflow cavity 4-1, a plurality of throttling holes A8-1 (a sleeve runner is in a small hole type) are formed in the sleeve 8 along the height direction, an upper valve clack 6 is connected in the sleeve 8 in a sliding manner, a guide ring 7 is arranged at the matching part of the upper valve clack 6 and the inner wall of the sleeve 8, and the upper valve clack 6 is connected with the upper valve seat 5 in a matching manner;
the lower valve cover assembly 1 is provided with a second medium outflow cavity 1-1, the communicating part of the first medium outflow cavity 4-2 and the second medium outflow cavity 1-1 is hermetically connected with a lower valve seat 3, a plurality of throttling holes B2-1 are formed in the lower valve clack 2 along the height direction, and the lower valve clack 2 used for opening and closing the throttling hole B2-1 is connected on the lower valve seat 3 in a sliding manner;
one end of the valve rod 10 is connected with an actuating mechanism 12, the other end of the valve rod 10 is fixedly connected with the lower valve clack 2, and the middle position of the valve rod 10 is fixedly connected with the upper valve clack 6; the upper and lower clapper 6, 2 strokes are synchronized and the orifice B2-1 is in a fully open state when the valve stem 10 is moved to enable the multiple orifices A8-1 to be in a fully closed state. When the plurality of throttle holes A8-1 are in a completely closed state, the upper valve clack 6 and the upper valve seat 5 form a conical sealing structure.
One end of the lower valve clack 2 is provided with an inner hole 2-2, the other end of the lower valve clack 2 is provided with a tapered hole 2-4, a step 2-3 (used for limiting and sealing) is arranged at the joint of the inner hole 2-2 and the tapered hole 2-4, one end of the lower valve clack 2, which comprises the inner hole 2-2, is in sliding fit with the bottom opening of the lower valve seat 3, the inner hole 2-2 is communicated with the first medium outflow cavity 4-2, and the inner hole 2-2 is communicated with the second medium outflow cavity 1-1 through a throttling hole B2-1.
The working principle is as follows:
the primary pressure reduction and flow regulation control are realized through the regulation control of the upper valve clack 6 and the sleeve 8, and a steam medium enters the shaft seal system, namely enters from the medium inflow cavity 4-1 and flows out from the first medium outflow cavity 4-2 to the shaft seal system; the secondary decompression and flow regulation control of the steam medium are realized through the regulation control of the lower valve clack 2 and the lower valve seat 3, and the steam medium subjected to the regulation control enters the condenser, namely enters from the medium inflow cavity 4-1 and flows out from the second medium outflow cavity 1-1 to enter the condenser. When the valve rod 10 is driven to move upwards through the adjustment and control of the actuating mechanism, the opening of the upper valve clack 6 is increased, and the steam flow to the shaft seal system is increased. Meanwhile, the flow area of the lower valve clack is reduced, and the steam flow to the condenser is reduced. As the valve stem moves downward, the steam flow to the shaft seal system decreases and the steam flow to the condenser increases. Shaft seal of outlet BThe steam of the system is realized by moving the upper valve flap and changing the throttling area of the sleeve to realize primary decompression. The steam medium to the condenser is steam from the outlet of the figure C, and the secondary pressure reduction is realized by changing the flow area throttling of the small hole of the lower valve clack. In the figure q1＝q2+q3That is, the inlet flow of the valve is the sum of the two paths of steam flows at the outlet of the valve, when q is1When the valve clack moves upwards, the steam flow to the outlet shaft seal B is increased, and the steam flow to the outlet condenser C is reduced. At this point, the pressure to the B outlet also increases and the pressure to the C outlet decreases.
The utility model has the characteristics that:
(1) the upper valve clack and the upper valve seat adopt a conical surface sealing structure form. The seal pair is used for surfacing STL6 and STL12 hard alloy, the seal pair is provided with 3-5 HRC hardness difference, the scouring resistance is improved, meanwhile, the sealing performance of the valve is improved, and the service life of the valve is prolonged.
(2) The antimony-added graphite guide ring is arranged at the guide part of the upper valve clack and the sleeve, so that the guide effect is improved, the occurrence of the blocking phenomenon during the action of the valve clack is avoided, and the vibration is reduced.
(3) The sleeve pressure reduction runner is in a small hole type, steam uniformly flows around, and noise is reduced while the steam pressure is reduced.
(4) The lower valve clack is provided with a small-hole throttling flow channel, so that secondary decompression and flow regulation control are realized, and reasonable distribution of flow is realized. The noise is further reduced while the flow and pressure are regulated and controlled.
(5) The valve is controlled by an electric, hydraulic, pneumatic or electro-hydraulic linkage actuating mechanism, the strokes of the upper valve clack 6 and the lower valve clack 2 are synchronous, remote control can be realized, and the automation degree is further improved.
It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.
Claims (5)
1. A flow pressure regulating control dispensing valve characterized by: the valve comprises a lower valve cover assembly (1), a lower valve clack (2), a lower valve seat (3), a valve body (4), an upper valve seat (5), an upper valve clack (6), a sleeve (8), a valve cover (9), a valve rod (10), a support (11) and an actuating mechanism (12), wherein the upper part of the valve body (4) is fixedly connected with the valve cover (9), the valve cover (9) is fixedly connected with the actuating mechanism (12) through the support (11), and the lower part of the valve body (4) is fixedly connected with the lower valve cover assembly (1);
the valve body (4) is provided with a medium inflow cavity (4-1) and a first medium outflow cavity (4-2), an upper valve seat (5) is arranged on the valve body (4) at the communication position of the medium inflow cavity (4-1) and the first medium outflow cavity (4-2), a sleeve (8) connected with the upper valve seat (5) is arranged in the medium inflow cavity (4-1), a plurality of throttling holes A (8-1) are formed in the sleeve (8) along the height direction, an upper valve clack (6) is connected in the sleeve (8) in a sliding manner, and the upper valve clack (6) is connected with the upper valve seat (5) in a matching manner;
a second medium outflow cavity (1-1) is arranged on the lower valve cover assembly (1), a lower valve seat (3) is hermetically connected at the communication position of the first medium outflow cavity (4-2) and the second medium outflow cavity (1-1), a plurality of throttling holes B (2-1) are formed in the lower valve clack (2) along the height direction, and the lower valve clack (2) used for opening and closing the throttling holes B (2-1) is slidably connected on the lower valve seat (3);
one end of the valve rod (10) is connected with the actuating mechanism (12), the other end of the valve rod (10) is fixedly connected with the lower valve clack (2), and the middle position of the valve rod (10) is fixedly connected with the upper valve clack (6); the strokes of the upper valve clack (6) and the lower valve clack (2) are synchronous, and when the valve rod (10) moves to enable the plurality of throttling holes A (8-1) to be in a completely closed state, the throttling holes B (2-1) are in a completely communicated state.
2. The flow pressure regulating control distribution valve according to claim 1, wherein: when the plurality of orifices A (8-1) are in a completely closed state, the upper valve clack (6) and the upper valve seat (5) are in a conical surface sealing structure.
3. The flow pressure regulating control distribution valve according to claim 1, wherein: and a guide ring (7) is arranged at the matching position of the upper valve clack (6) and the inner wall of the sleeve (8).
4. The flow pressure regulating control distribution valve according to claim 1, wherein: an inlet communicated with the medium inflow cavity (4-1) and an outlet communicated with the first medium outflow cavity (4-2) are coaxially arranged.
5. The flow pressure regulating control distribution valve according to claim 1, wherein: an inner hole (2-2) is formed in one end of the lower valve clack (2), a tapered hole (2-4) is formed in the other end of the lower valve clack (2), a step (2-3) is arranged at the joint of the inner hole (2-2) and the tapered hole (2-4), one end, containing the inner hole (2-2), of the lower valve clack (2) is in sliding fit with an opening in the bottom surface of the lower valve seat (3), the inner hole (2-2) is communicated with the first medium outflow cavity (4-2), and the inner hole (2-2) is communicated with the second medium outflow cavity (1-1) through a throttling hole B (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220166583.5U CN216715298U (en) | 2022-01-21 | 2022-01-21 | Flow pressure regulation control distribution valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220166583.5U CN216715298U (en) | 2022-01-21 | 2022-01-21 | Flow pressure regulation control distribution valve |
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| Publication Number | Publication Date |
|---|---|
| CN216715298U true CN216715298U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220166583.5U Active CN216715298U (en) | 2022-01-21 | 2022-01-21 | Flow pressure regulation control distribution valve |
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| Country | Link |
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| CN (1) | CN216715298U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386831A (en) * | 2023-12-13 | 2024-01-12 | 哈尔滨滨大阀门制造有限公司 | Modularized wide-load steam regulating valve |
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2022
- 2022-01-21 CN CN202220166583.5U patent/CN216715298U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386831A (en) * | 2023-12-13 | 2024-01-12 | 哈尔滨滨大阀门制造有限公司 | Modularized wide-load steam regulating valve |
| CN117386831B (en) * | 2023-12-13 | 2024-03-12 | 哈尔滨滨大阀门制造有限公司 | Modularized wide-load steam regulating valve |
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