CN211259685U - Multistage axial flow and cage compound valve core regulating valve - Google Patents
Multistage axial flow and cage compound valve core regulating valve Download PDFInfo
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- CN211259685U CN211259685U CN201922397259.5U CN201922397259U CN211259685U CN 211259685 U CN211259685 U CN 211259685U CN 201922397259 U CN201922397259 U CN 201922397259U CN 211259685 U CN211259685 U CN 211259685U
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Abstract
The utility model relates to a multistage axial flow, cage double entry case governing valve belongs to a governing valve, which comprises a valve body, valve gap and valve rod, be equipped with double entry case subassembly and disk seat in the valve body, double entry case subassembly includes the big valve plug and the little valve plug of inside and outside suit, wherein big valve plug includes big valve plug porous sleeve and big valve plug cage throttle sleeve complex, little valve plug includes little valve plug porous sleeve and multistage axial flow, cage big valve plug complex, during little aperture, little valve plug work, during big aperture, big valve plug and little valve plug simultaneous working, satisfy heavy load operating mode demand, in addition, through the effect of valve plug cis-position spring, make big valve plug open at last when the valve is opened all the time, close at first when the valve is closed, effectual protection valve, the life of governing valve has been prolonged, the adjusting performance of this double entry case governing valve has been improved simultaneously greatly.
Description
Technical Field
The utility model relates to a governing valve, in particular to multistage axial compressor, cage double entry case governing valve.
Background
In the technical field of temperature reduction water regulation of thermal power plants and in the industrial field, when the high pressure difference and the large working condition and the small working condition of liquid or gas are greatly different, a system generally requires two working conditions of large and small working conditions to work, only one large valve is used, the regulation requirement of the small working condition is difficult to achieve, and moreover, in the small working condition, the large valve is in a small opening state, so that the main sealing surface is greatly scoured, and the service life of the valve is greatly influenced; and the requirement of adjusting the flow under large working conditions is difficult to meet only by using a small valve.
At present, most high differential pressure regulating valves in the market sacrifice regulating characteristics and service life to meet regulating requirements in the working process. Not only reduces the adjusting precision, but also greatly improves the cost burden of enterprises.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's defect, the utility model provides a multistage axial compressor, cage double entry case governing valve through the double entry case subassembly that sets up big valve plug and little valve plug and constitute in the valve body, when little operating mode, only little valve plug work, and when big operating mode, big valve plug and little valve plug simultaneous working have not only improved the regulation performance of regulating valve, can also effectively prolong the life of valve.
The technical scheme for realizing the purpose is as follows:
the utility model provides a multistage axial flow and cage compound valve core regulating valve, which comprises a valve body, a valve cover and a valve rod, wherein the lower end of the valve body is provided with an inlet and an outlet, a valve cavity communicated with the inlet and the outlet is arranged in the valve body, a compound valve core assembly is arranged in the valve cavity, the compound valve core assembly comprises a large valve plug and a small valve plug which are sleeved and connected from outside to inside, the large valve plug comprises a large valve plug porous sleeve and a large valve plug cage throttling sleeve combination body which are connected from top to bottom, and the small valve plug comprises a small valve plug porous sleeve and a multistage axial flow and cage large valve plug combination body which are;
a valve seat is integrally arranged at the bottom of the large valve plug cage throttling sleeve combination body, the valve seat is positioned at the bottom of the valve cavity, a guide inclined plane is arranged on the valve seat, and the small valve plug is provided with a first sealing surface matched with the guide inclined plane and used for blocking the communication between an inlet and an outlet through an inner cavity of the large valve plug;
a small valve plug cavity is formed in the small valve plug and is communicated with the valve seat, a small valve plug rod is arranged in the small valve plug cavity, the valve rod penetrates through the valve cover and is integrally connected with the small valve plug rod, the small valve plug rod is provided with a valve rod flange, and the bottom of the small valve plug rod and the small valve plug cavity form a second seal for blocking the communication between the small valve plug cavity and the outlet;
the porous telescopic top of big valve plug is equipped with big valve plug sleeve and accepts the lid, the porous telescopic top of little valve plug is equipped with little valve plug sleeve and accepts the lid, big valve plug sleeve accept the lid with little valve plug sleeve is accepted and is connected with valve plug cis-position spring between the lid, provides the elastic support power for big valve plug, makes big valve plug keep in the bottom of valve pocket, is in the closed condition.
Furthermore, the multi-stage axial flow and cage large valve plug combination is of a multi-stage structure in threaded connection and is suitable for an inclined groove type throttling hole; or the multi-stage axial flow and cage large valve plug combined body is of an integrated structure and is suitable for the annular groove type throttling hole.
Further, the large valve plug cage throttling sleeve combination is a perforated valve cage; or the large valve plug cage throttling sleeve is combined to form a labyrinth valve cage and is used for controlling the opening of a throttling hole and adjusting the flow.
Furthermore, a cobalt-based hard alloy layer is arranged at the first sealing surface, so that the wear resistance of the sealing surface is improved, and the service life of the regulating valve is prolonged.
Furthermore, a multistage throttling chute or an annular groove which is connected in series is arranged in the small valve plug cavity and used for decomposing pressure difference and avoiding flash evaporation and cavitation.
Further, the inlet is obliquely or vertically arranged on one side of the valve body;
the outlet is arranged on the other side of the valve body or at the bottom of the valve body so as to be suitable for different working environment requirements.
Further, the big valve plug porous sleeve is provided with a first pressure reduction flow equalizing hole for reducing pressure difference and equalizing fluid.
Further, the porous sleeve of little valve plug is equipped with the even discharge orifice of second decompression for reduce pressure differential makes the fluid flow equalize.
Has the advantages that: compared with the prior art, the utility model has the difference that the utility model provides a multistage axial flow and cage compound valve core regulating valve, which comprises a valve body, a valve cover and a valve rod, wherein a compound valve core component and a valve seat are arranged in the valve body, the compound valve core component comprises a large valve plug and a small valve plug which are sleeved inside and outside, the large valve plug comprises a large valve plug porous sleeve and a large valve plug cage throttling sleeve combined body, the small valve plug comprises a small valve plug porous sleeve and a multistage axial flow and cage large valve plug combined body, when the opening degree is small, fluid flows in and out through an inlet, the large valve plug porous sleeve, the small valve plug porous sleeve and a small valve plug cavity, only the small valve plug works, when the opening degree is large, the first sealing surface formed by the small valve plug and the valve seat is opened, the fluid flows in and out through the opening, the large valve plug cage throttling sleeve and the first sealing surface, satisfy the heavy load operating mode demand, in addition, through the effect of valve plug cis-position spring, make the big valve plug open at the valve last when opening all the time, close at first when closing, effectual protection valve has prolonged the life of governing valve, has improved the regulation performance of this double entry case governing valve simultaneously greatly.
Drawings
Fig. 1 is a front sectional view of a multi-stage axial flow and cage composite valve element regulating valve according to a preferred embodiment of the present invention.
Fig. 2 is a front sectional view of the inlet port of fig. 1 vertically provided at one side of the valve body.
Fig. 3 is a front sectional view of the outlet of fig. 2 at the bottom of the valve body.
The valve comprises a valve body 1, an inlet 11, an outlet 12, a valve cover 2, a valve rod 3, a large valve plug 4, a large valve plug porous sleeve 41, a large valve plug cage throttling sleeve combination 42, a valve seat 43, a large valve plug sleeve receiving cover 44, a small valve plug 5, a small valve plug porous sleeve 51, a multistage axial flow cage large valve plug combination 52, a first sealing surface 53, a small valve plug rod 54, a valve rod flange 55, a small valve plug sleeve receiving cover 56 and a valve plug cis-position spring 6.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1 to 3, the present invention provides a multi-stage axial flow and cage composite spool regulating valve, which comprises a valve body 1, a valve cover 2 and a valve rod 3, wherein the lower end of the valve body 1 is provided with an inlet 11 and an outlet 12, a valve cavity communicating the inlet 11 with the outlet 12 is arranged in the valve body 1, a composite spool assembly is arranged in the valve cavity, the composite spool assembly comprises a large valve plug 4 and a small valve plug 5 which are sleeved and connected from outside to inside, the large valve plug 4 comprises a large valve plug porous sleeve 41 and a large valve plug cage throttling sleeve combination 42 which are connected from top to bottom, and the small valve plug 5 comprises a small valve plug porous sleeve 51 and a multi-stage axial flow and cage large valve plug combination 52 which are connected from;
a valve seat 43 is integrally arranged at the bottom of the large valve plug cage throttling sleeve combination body 42, the valve seat 43 is positioned at the bottom of the valve cavity, a guide inclined plane is arranged on the valve seat 43, and the small valve plug 5 is provided with a first sealing surface 53 matched with the guide inclined plane and used for blocking the communication between an inlet and an outlet 12 through an inner cavity of the large valve plug 4;
a small valve plug cavity is formed in the small valve plug 5 and is communicated with the valve seat 43, a small valve plug rod 54 is arranged in the small valve plug cavity, the valve rod 3 penetrates through the valve cover 2 and is integrally connected with the small valve plug rod 54, the small valve plug rod 54 is provided with a valve rod flange 55, and the bottom of the small valve plug rod 54 and the small valve plug cavity form a second seal for blocking communication between the small valve plug cavity and the outlet 12;
the top of the big valve plug porous sleeve 41 is provided with a big valve plug sleeve receiving cover 44, the top of the small valve plug porous sleeve 51 is provided with a small valve plug sleeve receiving cover 56, the big valve plug sleeve receiving cover 44 and the small valve plug sleeve receiving cover 56 are connected with a valve plug cis-position spring 6, provide elastic supporting force for the big valve plug 4, and make the big valve plug 4 keep at the bottom of the valve cavity, in a closed state.
Preferably, the multi-stage axial flow cage large valve plug combination 52 is a threaded multi-stage structure suitable for a chute type orifice; alternatively, the multi-stage axial flow, cage and large valve plug combination 52 is an integral structure suitable for an annular groove type orifice.
Preferably, the large plug cage throttling sleeve combination 42 is a perforated cage; alternatively, the large plug cage throttling sleeve combination 42 is a labyrinth type valve cage and is used for controlling the opening degree of a throttling hole and adjusting the flow.
Preferably, a cobalt-based hard alloy layer is arranged at the first sealing surface 51, so that the wear resistance of the sealing surface is improved, and the service life of the regulating valve is prolonged.
Preferably, a three-level throttling chute or an annular groove connected in series is arranged in the small valve plug cavity and used for decomposing pressure difference and avoiding flash evaporation and cavitation.
Preferably, the inlet 11 is obliquely or vertically arranged on one side of the valve body 1; the outlet 12 is arranged at the other side of the valve body 1 or at the bottom of the valve body 1 so as to be suitable for different working environment requirements.
Preferably, the large plug porous sleeve 41 is provided with a first pressure reducing and flow equalizing hole for reducing the pressure difference and equalizing the flow.
Preferably, the small plug porous sleeve 51 is provided with a second pressure reducing and flow equalizing hole for reducing the pressure difference and equalizing the flow.
The working process of the small valve plug is as follows: under the action of an actuator (electric, pneumatic or manual), the valve rod and the small valve plug rod move downwards to close the communication between the small valve plug cavity and the base, and the valve is in a closed state; when the valve is opened, the small valve plug rod moves upwards, the second seal is opened, the fluid flows through the first decompression flow equalizing hole of the large valve plug porous sleeve through the inlet, the second decompression flow equalizing hole of the small valve plug porous sleeve flows into the small valve plug cavity, then the fluid passes through the three-level throttling chute or the annular groove which are connected in series, the fluid enters the outlet through the second seal, the fluid is discharged from the outlet, the fluid passes through the pressure reduction process of the six throttling controls between the inlet and the outlet, along with the upward movement of the small valve plug rod, the throttling holes at different levels are not broken greatly, the flow is increased continuously, and in the process, the small valve plug in the large valve plug inner cavity is under the action of the valve plug cis-position spring and the pressure difference, and the first sealing.
It should be noted that the multi-stage throttling chutes or annular grooves provided in the small valve plug cavity of the present embodiment are preferably three-stage, and obviously, according to actual working requirements, four-stage, five-stage, six-stage, etc. may also be provided, which is not limited herein.
The working process of the large valve plug is as follows: after the small valve plug is completely opened, the pressure difference acting on the inner cavity of the large valve plug is greatly reduced, after the small valve plug is completely opened, the valve rod flange is contacted with the small valve plug sleeve receiving cover under the action of the small valve plug rod to drive the small valve plug to integrally move upwards, so that the first sealing surface formed by the small valve plug and the valve seat is opened, and fluid flowing in from the inlet enters the valve seat through the large valve plug cage throttling sleeve combination body and then flows to the outlet to be discharged from the outlet.
Under the condition of high pressure difference and low flow, the small valve plug works, the throttling stage number of the small valve plug is multiple, the pressure difference is decomposed in multiple stages, flash evaporation and cavitation are avoided, when the large valve plug intervenes, the pressure difference is weakened, the large valve plug and the small valve plug work simultaneously, the requirement of a large-load working condition is met, when the valve is closed, under the action of the valve plug cis-position spring and the pressure difference, the small valve plug moves downwards firstly along with the downward movement of the small valve plug rod, the small valve plug and the valve seat form a first sealing surface, the communication between the inner cavity of the large valve plug and the valve seat is closed, and the large valve plug is; and the small valve plug rod continuously moves downwards, finally the small valve plug rod moves downwards to the bottom of the small valve plug cavity to form a second seal with the small valve plug cavity, the communication between the small valve plug cavity and the valve seat is closed, the small valve plug is closed, and the whole valve is closed.
Therefore, when the valve is opened, the small valve plug is opened firstly, and the large valve plug is opened finally; when the valve is closed, the large valve plug closes first and the small valve plug closes last. The valve can be effectively protected, and the service life is prolonged.
It should be noted that the terms "first" and "second" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying any relative importance, and are to be interpreted as names.
The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.
Claims (10)
1. A multi-stage axial flow and cage compound valve core regulating valve comprises a valve body, a valve cover and a valve rod, wherein an inlet and an outlet are arranged at the lower end of the valve body, and a valve cavity communicated with the inlet and the outlet is arranged in the valve body;
a valve seat is integrally arranged at the bottom of the large valve plug cage throttling sleeve combination body, the valve seat is positioned at the bottom of the valve cavity, a guide inclined plane is arranged on the valve seat, and a first sealing surface matched with the guide inclined plane is arranged on the small valve plug;
a small valve plug cavity is formed in the small valve plug and is communicated with the valve seat, a small valve plug rod is arranged in the small valve plug cavity, the valve rod penetrates through the valve cover and is integrally connected with the small valve plug rod, the small valve plug rod is provided with a valve rod flange, and the bottom of the small valve plug rod and the small valve plug cavity form a second seal;
the porous telescopic top of big valve plug is equipped with big valve plug sleeve and accepts the lid, the porous telescopic top of little valve plug is equipped with little valve plug sleeve and accepts the lid, big valve plug sleeve accept the lid with little valve plug sleeve is accepted and is connected with valve plug cis-position spring between the lid.
2. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the multi-stage axial flow and cage large valve plug combination is of a multi-stage structure in threaded connection.
3. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the multi-stage axial flow cage large valve plug combination body is of an integrated structure.
4. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the large valve plug cage throttling sleeve combination is a perforated valve cage.
5. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the large valve plug cage throttling sleeve combination is a labyrinth type valve cage.
6. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
and a cobalt-based hard alloy layer is arranged at the first sealing surface.
7. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
and a multi-stage serial throttling chute or annular groove is arranged in the small valve plug cavity.
8. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the inlet is obliquely or vertically arranged on one side of the valve body;
the outlet is arranged on the other side of the valve body or at the bottom of the valve body.
9. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the porous sleeve of big valve plug is equipped with the equal discharge orifice of first decompression.
10. The multi-stage axial flow, cage compound spool regulator valve of claim 1, wherein:
the porous sleeve of little valve plug is equipped with the equal discharge orifice of second decompression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922397259.5U CN211259685U (en) | 2019-12-27 | 2019-12-27 | Multistage axial flow and cage compound valve core regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922397259.5U CN211259685U (en) | 2019-12-27 | 2019-12-27 | Multistage axial flow and cage compound valve core regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211259685U true CN211259685U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922397259.5U Active CN211259685U (en) | 2019-12-27 | 2019-12-27 | Multistage axial flow and cage compound valve core regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211259685U (en) |
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2019
- 2019-12-27 CN CN201922397259.5U patent/CN211259685U/en active Active
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